Work vehicle
Technical field
[0001]
　The present invention relates to a technique of a work vehicle including an accelerator operating mechanism that adjusts the engine speed according to the operation of an operating member.
Background technology
[0002]
　Conventionally, a technique of a work vehicle including an accelerator operation mechanism for adjusting the engine speed according to the operation of an operation member has been known. For example, as described in Patent Document 1.
[0003]
　The accelerator adjusting mechanism of a work vehicle (tractor) described in Patent Document 1 has a lever-type operating member (throttle lever) that adjusts the engine speed by swinging. The operating member is connected to the throttle valve of the engine via a wire or the like, and is configured to be able to operate the throttle valve by swinging.
[0004]
　The operating member described in Patent Document 1 is arranged on the right side of the cockpit. On the right side of the control seat, many operating tools such as a PTO clutch switch and a plurality of hydraulic operating levers are provided. For this reason, it may be difficult to arrange the operating member with a sufficient distance from other operating tools. In addition, the movement of the hand during operation becomes large due to the convenience of swinging the operating member for operation. Therefore, when operating the operating member, there is a possibility that it becomes easy to touch other operating tools. There was room for improvement in this regard.
Advanced technical literature
Patent documents
[0005]
Patent Document 1: Japanese Unexamined Patent Publication No. 2015-188430
Outline of the invention
Problems to be solved by the invention
[0006]
　The present invention has been made in view of the above circumstances, and the problem to be solved is to provide a work vehicle capable of suppressing contact with other operating tools when operating the operating member. Is.
Means to solve problems
[0007]
　The problem to be solved by the present invention is as described above, and next, the means for solving this problem will be described.
[0008]
　The work vehicle of the present invention has a steering post that supports a steering wheel and a dial-type operating member that is provided on the steering post and is rotated. It is provided with an accelerator operation mechanism for adjusting the number.
[0009]
　Further, the accelerator operation mechanism further includes a detection member for detecting the amount of rotation of the operation member.
[0010]
　Further, the accelerator operating mechanism is arranged on the shaft on which the operating member is fixed, the fixing member fixed to the shaft, and the radial outside of the shaft with respect to the fixing member, and the rotation of the fixing member Further, the detection member detects the rotation amount of the operation member based on the rotation amount of the rotation member, and is coaxial with the rotation member. It is placed on top.
[0011]
　Further, the accelerator operation mechanism further includes a support member that supports the rotating member on one side surface and further supports the detection member on the other side surface opposite to the one side surface.
[0012]
　Further, the detection member has a shaft portion, and the rotation amount of the rotating member is detected by rotating the shaft portion, and the accelerator operating mechanism is fixed to the shaft portion and the rotation is performed. It further has a link member that is engaged with the rotating member so as to be displaceable in the radial direction of the moving member and rotates the shaft portion with the rotation of the rotating member.
[0013]
　Further, the rotating member engages with the link member by a notch formed in the outer edge portion.
[0014]
　Further, the notch portion is formed so as to extend in the radial direction of the rotating member.
[0015]
　Further, the accelerator operating mechanism further has a friction plate that holds the rotational position of the operating member by generating a frictional force with the fixing member.
[0016]
　Further, the accelerator operating mechanism further includes a first urging member that presses the friction plate against the fixing member, and an adjusting mechanism that can adjust the urging force of the first urging member.
[0017]
　Further, the accelerator operation mechanism is connected to the second urging member that urges the rotating member in a direction in which the rotation speed of the engine becomes lower, and the rotating member via a cable, and is stepped on by the driver. It further has an accelerator pedal for rotating the rotating member.
The invention's effect
[0018]
　As the effect of the present invention, the following effects are exhibited.
[0019]
　The work vehicle of the present invention can suppress contact with other operating tools when operating the operating member.
[0020]
　The work vehicle of the present invention can operate the operating member with a small force by adjusting the engine speed based on the detection result of the detecting member.
[0021]
　In the work vehicle of the present invention, the width of the accelerator operating mechanism can be reduced.
[0022]
　In the work vehicle of the present invention, the rotating member and the detecting member can be arranged in a well-balanced manner with the support member interposed therebetween.
[0023]
　In the work vehicle of the present invention, even if the shaft portion of the detection member and the rotating member are misaligned, it is possible to suppress the load on the shaft portion.
[0024]
　The work vehicle of the present invention can simplify the configuration for engaging with the link member.
[0025]
　The work vehicle of the present invention can absorb the misalignment between the shaft portion of the detection member and the rotating member with a notch portion having a simple shape.
[0026]
　The work vehicle of the present invention can improve operability.
[0027]
　The work vehicle of the present invention can easily adjust the frictional force generated between the friction plate and the fixing member.
[0028]
　The work vehicle of the present invention can be provided with an accelerator pedal and a second urging member without complicating the configuration.
A brief description of the drawing
[0029]
FIG. 1 is a side view showing an overall configuration of a tractor according to an embodiment of the present invention.
[Fig. 2] Right rear perspective view showing the internal configuration of the cabin.
[Fig. 3] Similarly, a left front perspective view.
FIG. 4 is a perspective view showing the configuration of an accelerator operation mechanism.
[Fig. 5] Similarly, the front view.
FIG. 6 is a sectional view taken along the line AA.
FIG. 7 is a side view showing a rotating member and a member provided around the rotating member.
FIG. 8 is a side view showing a state in which an operating member is rotated so as to reduce the engine speed.
FIG. 9 is a side view showing a rotating member and a member provided around the rotating member in a low speed state.
FIG. 10 is a side view showing a state in which an operating member is rotated so as to increase the engine speed.
FIG. 11 is an enlarged side view showing a state in which the rotating member and the potentiometer are misaligned.
[Fig. 12] A side view showing a state in which the accelerator pedal is depressed.
FIG. 13 is a perspective view showing a fender, a right operation unit, and a bracket.
FIG. 14 is an enlarged perspective view showing a fender and a bracket.
FIG. 15 is a cross-sectional view showing a fender frame, a first thin plate, and an upper mounting portion.
FIG. 16 is a perspective view showing a right operation unit and a bracket.
[Fig. 17] Similarly, a side view.
FIG. 18 is a plan view showing a right operation unit and a cover member.
FIG. 19 is a plan view showing a cover member.
FIG. 20 is a front perspective view showing the bracket.
[Fig. 21] Similarly, a side view.
[Fig. 22] Similarly, a rear perspective view.
[Fig. 23] Similarly, a plan view.
[Fig. 24] Similarly, the front view.
Mode for carrying out the invention
[0030]
　In the following, the directions indicated by arrows U, D, arrow F, arrow B, arrow L, and arrow R in the figure are defined as upward, downward, forward, backward, leftward, and rightward, respectively. I will explain.
[0031]
　First, the overall configuration of the tractor 1 will be described with reference to FIG.
[0032]
　In the present embodiment, the tractor 1 is illustrated as a work vehicle, but the present invention is not limited to this. That is, the work vehicle may be another agricultural vehicle, construction vehicle, industrial vehicle, or the like.
[0033]
　The tractor 1 mainly includes an airframe frame 2, front wheels 3, rear wheels 4, an engine 5, a bonnet 6, a transmission 7, a steering wheel 8, a fender 10, a seat 21, and a cabin 22.
[0034]
　The airframe frame 2 is arranged with its longitudinal direction facing the front-rear direction. The front portion of the fuselage frame 2 is supported by a pair of left and right front wheels 3 via a front axle mechanism (not shown). A transmission 7 is provided at the rear of the fuselage frame 2. The rear portion of the transmission 7 is supported by a pair of left and right rear wheels 4 via a rear axle mechanism (not shown). An engine 5 is provided at the front of the airframe frame 2. The engine 5 is covered with a bonnet 6.
[0035]
　The power of the engine 5 can be transmitted to the front wheels 3 via the front axle mechanism and to the rear wheels 4 via the rear axle mechanism after the power is changed by the transmission 7. The front wheels 3 and the rear wheels 4 are rotationally driven by the power of the engine 5, and the tractor 1 can travel.
[0036]
　A fender 10 and a cabin 22 that cover the rear wheels 4 are provided behind the engine 5. A living space 22a on which the driver is boarding is formed inside the cabin 22. In the living space 22a, a seat 21 for the driver to sit on and a meter panel 23 (see FIG. 2) capable of displaying various information in front of the seat 21 are arranged.
[0037]
　Further, as shown in FIGS. 2 and 3, a steering wheel 8 for adjusting the turning angle of the front wheels 3 and a steering post 9 for supporting the steering wheel 8 are arranged in the living space 22a. The steering wheel 8 and the steering post 9 are configured to be swingable in the vertical direction by a predetermined tilt mechanism.
[0038]
　In addition, various operating tools are arranged in the living space 22a. Specifically, on the right side (fender 10) of the living space 22a, a PTO lever 70 for switching whether or not power can be transmitted to the PTO axis (not shown), and a plurality of auxiliary controls for controlling the working machine (not shown). The lever 80 and the like are arranged. Further, in the front portion (steering post 9) of the living space 22a, an operation lever 9a for operating a work light and a blinker, and an operation member 31 for adjusting the rotation speed of the engine 5 are arranged.
[0039]
　Next, the configuration of the accelerator operating mechanism 30 that adjusts the rotation speed of the engine 5 according to the operation of the operating member 31 will be described with reference to FIGS. 1 to 7. In the following, the configuration of the accelerator operation mechanism 30 will be described with reference to a state adjusted so that the rotation speed of the engine 5 becomes the highest (the state shown in FIG. 4, hereinafter referred to as a “high speed state”). ..
[0040]
　As shown in FIG. 3, the accelerator operating mechanism 30 is provided inside the steering post 9 except for the operating member 31, and is configured to be swingable as the steering post 9 swings. As shown in FIGS. 1, 4 and 5, the accelerator operating mechanism 30 includes an operating member 31, a shaft 32, a support member 33, a fixing member 34, a rotating member 35, a link member 36, a potentiometer 37, and a return spring 38. It includes an accelerator pedal 39, a friction plate 40, an adjustment mechanism 50, and the like.
[0041]
　As shown in FIG. 3, the steering wheel 8 and the steering post 9 are inclined rearward, and the accelerator operating mechanism 30 is also inclined rearward along with the inclination. Therefore, in FIGS. 4, 5, and 7 to 12 described later, in order to make it easier to understand the configuration of the accelerator operating mechanism 30, the axial direction (tilt direction) of the steering wheel 8 is set to face the vertical direction of the paper surface. The accelerator operating mechanism 30 is described. Further, the arrow U1 indicates an upward direction in the axial direction of the steering wheel 8. Further, the arrow D1 indicates a downward direction in the axial direction of the steering wheel 8.
[0042]
　The operation member 31 is for adjusting the rotation speed of the engine 5 by a manual operation of the driver. The operating member 31 is composed of a dial-type operating tool that is rotated. As shown in FIG. 6, the operation member 31 includes a hole portion 31a. The hole portion 31a is formed in a substantially semicircular shape in a side view, and opens on the left surface of the operating member 31.
[0043]
　The operating member 31 configured in this way is arranged on the right surface of the steering post 9 as shown in FIG. Further, the operating member 31 is arranged so as to be located near the lower end portion of the meter panel 23 when the driver looks at the meter panel 23. Specifically, the operating member 31 is arranged on a virtual line connecting the position of the driver's eyes seated on the seat 21 and the lower end of the meter panel 23. As a result, the operating member 31 can be arranged at a position as high as possible, and the driver's hand can easily reach the operating member 31 while suppressing the meter panel 23 from becoming difficult to see.
[0044]
　Hereinafter, the configuration of members (shaft 32, etc.) other than the operating member 31 of the accelerator operating mechanism 30 will be described with the arrow U1 direction shown in FIG. 4 upward and the arrow D1 direction downward.
[0045]
　The shaft 32 shown in FIGS. 5 and 6 is for rotatably supporting the operating member 31. The shaft 32 is arranged with its axial direction oriented in the left-right direction. The shaft 32 is formed so that its tip portion 32a (right end portion) has substantially the same shape as the hole portion 31a of the operating member 31. The tip portion 32a is inserted into the hole portion 31a. As a result, the operating member 31 is fixed to the shaft 32.
[0046]
　The support member 33 shown in FIGS. 4 and 5 is a substantially plate-shaped member that supports the shaft 32, the potentiometer 37, and the like. The support member 33 is fixed in the steering post 9 and is arranged with its plate surface facing in the left-right direction. Further, the support member 33 is arranged on the left side of the operation member 31 at intervals. The support member 33 rotatably supports the shaft 32 via a bush 33a attached to the left surface thereof and a bearing 33b (see FIG. 6) provided inside the bush 33a.
[0047]
　The fixing member 34 shown in FIGS. 5 and 6 is for transmitting the rotational power of the shaft 32 (rotational operation of the operating member 31) to the rotating member 35 described later. The fixing member 34 is fixed to the shaft 32 and arranged between the operating member 31 and the support member 33. As shown in FIGS. 5 and 7, the fixing member 34 includes a cylindrical portion 34a, a swing portion 34b, and a pin 34c.
[0048]
　The cylindrical portion 34a is a portion provided on the shaft 32. The cylindrical portion 34a is formed so that its inner diameter is substantially the same as the outer diameter of the shaft 32. The cylindrical portion 34a is fitted onto the shaft 32 and fixed to the shaft 32. The cylindrical portion 34a rotates integrally with the rotation of the shaft 32.
[0049]
　The rocking portion 34b is a plate-shaped portion formed at the rear lower portion on the outer peripheral surface of the cylindrical portion 34a. The swinging portion 34b is formed in a substantially Y-shape in a side view having a portion extending in the circumferential direction of the cylindrical portion 34a and a portion extending rearwardly and downwardly (diameterally outside of the cylindrical portion 34a) from the portion extending in the circumferential direction. Will be done. The swinging portion 34b is fixed to the cylindrical portion 34a and swings in the front-rear direction by the rotation of the cylindrical portion 34a.
[0050]
　The pin 34c is fixed to the rear lower portion of the swing portion 34b and is provided so as to project to the right from the swing portion 34b.
[0051]
　The rotating member 35 rotates in response to the rotation of the fixing member 34. As shown in FIGS. 4 and 7, the rotating member 35 is formed in a substantially plate shape and is arranged below the fixing member 34. The rotating member 35 includes a tubular portion 35a, a swinging portion 35b, a protruding portion 35c, a notch portion 35d, and an elongated hole 35e.
[0052]
　The tubular portion 35a is formed below the rotating member 35. The tubular portion 35a is arranged so that its axial direction is directed to the left-right direction. The tubular portion 35a is rotatably supported by the support member 33 via a bracket (not shown).
[0053]
　The swinging portion 35b is a plate-shaped portion formed on the upper portion of the outer peripheral surface of the tubular portion 35a. The swinging portion 35b is formed in a substantially semicircular shape in a side view. Further, the swinging portion 35b is formed so that its rear end portion protrudes in a circumferential shape centered on the tubular portion 35a.
[0054]
　The protruding portion 35c is a portion that protrudes substantially upward from the swinging portion 35b. The protruding portion 35c is formed in a substantially rectangular shape in a side view. The front portion of the protruding portion 35c comes into contact with the pin 34c of the fixing member 34.
[0055]
　The cutout portion 35d is formed by cutting out the outer edge portion (front upper end portion) of the swing portion 35b. The notch 35d is formed in a substantially U-shape in a lateral view. The cutout portion 35d is formed so as to extend in the radial direction of the tubular portion 35a.
[0056]
　The elongated hole 35e is a hole formed so as to extend in the circumferential direction of the tubular portion 35a. The elongated hole 35e is formed from the rear upper end portion to the rear lower end portion of the swing portion 35b.
[0057]
　The link member 36 shown in FIGS. 5 and 7 is for interlocking the rotating member 35 with the shaft portion 37a of the potentiometer 37 described later. The link member 36 is arranged between the rotating member 35 and the support member 33. The link member 36 includes a main body portion 36a and a pin 36b.
[0058]
　The main body portion 36a is formed in a substantially rectangular shape in a side view with its longitudinal direction directed toward the front upper side (rear lower side). The main body 36a is arranged so that its front upper portion overlaps with the notch 35d of the rotating member 35 in a side view. Further, the main body portion 36a is arranged so that the lower portion thereof overlaps with the tubular portion 35a of the rotating member 35 in a side view. The main body portion 36a is configured to be rotatable around the shaft portion 37a by fixing the lower end portion thereof to the shaft portion 37a of the potentiometer 37.
[0059]
　The pin 36b is fixed to the front upper portion of the main body portion 36a and is provided so as to project to the right from the main body portion 36a. The pin 36b is engaged with the notch 35d of the rotating member 35. Further, the pins 36b are arranged with a gap in the radial direction of the rotating member 35 with respect to the notch portion 35d. As a result, the pin 36b is configured to be displaceable in the radial direction of the rotating member 35.
[0060]
　The potentiometer 37 is for detecting the amount of rotation of the operating member 31. The potentiometer 37 is fixed to the left surface of the support member 33 and is arranged on the left side of the rotating member 35 with the support member 33 interposed therebetween. The potentiometer 37 includes a shaft portion 37a.
[0061]
　The shaft portion 37a is a portion where the rotation angle is detected by the potentiometer 37. The shaft portion 37a is formed in a substantially hexagonal shape in a side view, and is arranged so as to project to the right from the support member 33. The main body 36a of the link member 36 is fixed to the protruding portion of the shaft portion 37a. Further, the shaft portion 37a is arranged coaxially with the tubular portion 35a of the rotating member 35, and is arranged with a radial gap with respect to the tubular portion 35a.
[0062]
　The return spring 38 is for urging the rotating member 35 in the clockwise direction when viewed from the right side. The front upper end of the return spring 38 is attached to the front end of the swing portion 35b of the rotating member 35. Further, a mounting member 38a fixed to the support member 33 is mounted on the rear lower end portion of the return spring 38. As a result, the return spring 38 pulls the rotating member 35 backward and downward to urge the rotating member 35 in the clockwise direction when viewed from the right side.
[0063]
　The accelerator pedal 39 shown in FIG. 1 is for adjusting the rotation speed of the engine 5 by a stepping operation by the driver. The accelerator pedal 39 is provided at a step where the driver seated in the seat 21 puts his / her foot. The accelerator pedal 39 is connected to the rotating member 35 via the cable 39a, the plate-shaped member 39b, and the pin 39c shown in FIGS. 4 and 7.
[0064]
　One end of the cable 39a is connected to the accelerator pedal 39, and the other end is connected to the plate-shaped member 39b. The plate-shaped member 39b is formed in a substantially rectangular shape in a side view with its longitudinal direction directed in the vertical direction. The plate-shaped member 39b is arranged so as to overlap the elongated hole 35e of the rotating member 35 in a side view. The pin 39c is fixed to the upper end of the plate-shaped member 39b and inserted into the elongated hole 35e.
[0065]
　The friction plate 40 shown in FIGS. 5 and 6 is for generating a frictional force with the fixing member 34. The friction plate 40 is formed in a substantially annular shape. The friction plate 40 is fitted onto the shaft 32 so as not to rotate integrally with the shaft 32. A pair of left and right friction plates 40 are provided so as to sandwich the fixing member 34 (cylindrical portion 34a).
[0066]
　The compression spring 41 is for urging the friction plate 40 to the left. The compression spring 41 is fitted onto the shaft 32 and is arranged between the friction plate 40 on the right side and the operating member 31.
[0067]
　The adjusting mechanism 50 is for adjusting the urging force of the compression spring 41. The adjusting mechanism 50 includes a spring receiving portion 51, a cap 52, a plate 53, a stud 54, and a nut 55.
[0068]
　The spring receiving portion 51 is a substantially plate-shaped member for receiving the compression spring 41. The spring receiving portion 51 is fitted onto the shaft 32 and comes into contact with the left end portion of the compression spring 41. The spring receiving portion 51 is configured so that its front portion is hooked on a stud 54, which will be described later, so that the spring receiving portion 51 does not rotate integrally with the shaft 32.
[0069]
　The cap 52 is a substantially cup-shaped member for receiving the compression spring 41. The cap 52 is fitted onto the shaft 32 and comes into contact with the right end of the compression spring 41.
[0070]
　The plate 53 is a substantially plate-shaped member for supporting the stud 54 described later. The plate 53 is fitted onto the shaft 32 and comes into contact with the right surface of the cap 52. The plate 53 is configured to be slidable in the left-right direction with respect to the shaft 32.
[0071]
　The stud 54 is a member in which screw portions are formed at its left end portion and right end portion (both ends in the axial direction). A pair of studs 54 are provided on the front and rear sides of the shaft 32. The left and right ends of the front and rear studs 54 are inserted into the support member 33 and the plate 53.
[0072]
　The nut 55 is screwed onto the front and rear studs 54 (left end and right end) from the outside in the left-right direction, and is provided so as to sandwich the support member 33 and the plate 53 from the outside in the left-right direction.
[0073]
　Hereinafter, the operation of the accelerator operating mechanism 30 will be described with reference to FIGS. 7 to 10.
[0074]
　First, the operation of the accelerator operating mechanism 30 when the rotation speed of the engine 5 is lowered by the operating member 31 will be described. In the following, the rotation speed of the engine 5 is lowered from the high speed state shown in FIG. 7 to the state adjusted so that the rotation speed of the engine 5 becomes the lowest (hereinafter referred to as "low speed state"). This will be described by taking the case of
[0075]
　As shown in FIG. 8, when the rotation speed of the engine 5 is lowered, the operating member 31 is rotated counterclockwise when viewed from the right side (see arrow A1 shown in FIG. 8). As a result, the shaft 32 and the fixing member 34 (cylindrical portion 34a) are rotated in the counterclockwise direction when viewed from the right side. The swinging portion 34b and the pin 34c swing forward due to the rotation of the fixing member 34 (see arrow A2 shown in FIG. 8). Since the pin 34c is in contact with the front portion of the protruding portion 35c of the rotating member 35, the pin 34c tends to be separated from the protruding portion 35c by the swing.
[0076]
　The rotating member 35 is pulled backward and downward by the return spring 38 (see arrow A3 shown in FIG. 8) and is urged in the clockwise direction when viewed from the right side. Therefore, when the pin 34c swings forward, the rotating member 35 rotates in the clockwise direction when viewed from the right side by the urging force of the return spring 38 (see arrow A4 shown in FIG. 8). As a result, the pin 36b of the link member 36 engaged with the notch 35d of the rotating member 35 is pressed in the clockwise direction when viewed from the right side.
[0077]
　The link member 36 rotates about the shaft portion 37a of the potentiometer 37 in the clockwise direction in the right side view by the pressing. The shaft portion 37a of the potentiometer 37 rotates with the rotation of the link member 36 (see arrow A5 shown in FIG. 8). In this way, as shown in FIG. 9, the fixing member 34, the rotating member 35, the link member 36, and the shaft portion 37a rotate with the rotation of the operating member 31. When the fixing member 34 rotates until the swinging portion 34b comes into contact with the stud 54 on the front side, the rotation of the operating member 31 is restricted and the speed becomes low.
[0078]
　The potentiometer 37 detects the amount of rotation of the rotating member 35 based on the amount of rotation of the shaft portion 37a in the above-mentioned rotation operation of the operating member 31. Then, the potentiometer 37 detects the amount of rotation of the operating member 31 based on the amount of rotation. The accelerator operating mechanism 30 controls the throttle valve of the engine 5 based on the detection result of the operating member 31 to reduce the rotation speed of the engine 5.
[0079]
　Next, the operation of the accelerator operating mechanism 30 when the rotation speed of the engine 5 is increased by the operating member 31 will be described. In the following, a case where the engine speed is increased from the low speed state shown in FIG. 9 will be described as an example.
[0080]
　As shown in FIG. 10, when the rotation speed of the engine 5 is increased, the operating member 31 is rotated in the clockwise direction when viewed from the right side (see arrow B1 shown in FIG. 10). As a result, the shaft 32 and the fixing member 34 (cylindrical portion 34a) rotate in the clockwise direction when viewed from the right side. The swinging portion 34b and the pin 34c swing rearward due to the rotation of the fixing member 34, and press the protruding portion 35c of the rotating member 35 rearward (see arrow B2 shown in FIG. 10).
[0081]
　As a result, the rotating member 35 rotates in the counterclockwise direction when viewed from the right side by transmitting the rotational power of the operating member 31 from the fixing member 34 (see arrow B3 shown in FIG. 10). The shaft portion 37a of the link member 36 and the potentiometer 37 rotates in the counterclockwise direction when viewed from the right side with the rotation (see arrow B4 shown in FIG. 10). The potentiometer 37 detects the rotation amount of the operating member 31 based on the rotation amount of the shaft portion 37a, and increases the rotation speed of the engine 5 based on the detection result.
[0082]
　According to the accelerator operating mechanism 30 according to the present embodiment, it is possible to suppress touching other operating tools when operating the operating member 31. Specifically, as shown in FIGS. 2 and 3, the fender 10 (on the right side of the seat 21) is provided with a PTO lever 70 and a plurality of auxiliary control levers 80. On the other hand, the steering post 9 (right portion) is provided with an operating lever 9a. As described above, if the operating member 31 is provided on the steering post 9 in which the number of operating tools to be installed is relatively small, the operating member 31 can be arranged at a sufficient distance from the other operating tools. Further, according to the dial type operating member 31, the operating member 31 can be operated with a smaller movement than in the case of the lever type. As described above, it is possible to suppress touching other operating tools when operating the operating member 31.
[0083]
　Further, the operating member 31 is arranged so as to be located at a position lower than that of the steering wheel 8 regardless of the tilt operation of the steering wheel 8. As a result, even if the steering wheel 8 is tilted, the relative positional relationship between the steering wheel 8 and the operating member 31 does not change, making it easier to operate the operating member 31.
[0084]
　Further, the accelerator operation mechanism 30 adjusts the rotation speed of the engine 5 based on the detection result of the potentiometer 37. According to this, since it is not necessary to directly operate the throttle valve by connecting the operating member 31 to the throttle valve of the engine 5, the operating member 31 can be operated with a small force.
[0085]
　Further, as shown in FIG. 4, the potentiometer 37 indirectly detects the amount of rotation of the operating member 31 via the rotating member 35. With such a configuration, the operating member 31 and the shaft portion 37a of the potentiometer 37 do not have to be arranged concentrically, so that the width of the accelerator operating mechanism 30 in the left-right direction can be reduced.
[0086]
　Here, if the potentiometer 37 detects the amount of rotation of the rotating member 35, the potentiometer 37 does not link the rotating member 35 and the potentiometer 37 via the link member 36 as in the present embodiment. A configuration is also conceivable in which the shaft portion 37a is directly fixed to the tubular portion 35a of the rotating member 35. In this configuration, if the shaft portion 37a is misaligned with respect to the tubular portion 35a due to the influence of an assembly error or the like, the shaft portion 37a will swing around the tubular portion 35a, and the shaft A load may be applied to the portion 37a.
[0087]
　Therefore, in the present embodiment, the shaft portion 37a of the potentiometer 37 and the rotating member 35 are connected via the link member 36 so as to absorb the misalignment between the shaft portion 37a and the tubular portion 35a.
[0088]
　Specifically, as shown in FIG. 7, in the link member 36, the pin 36b is arranged with a gap in the radial direction of the rotating member 35 with respect to the notch portion 35d. According to such a configuration, as shown in FIG. 11, when the shaft portion 37a and the tubular portion 35a are misaligned, the pin 36b can be displaced in the radial direction with respect to the rotating member 35 ( Refer to the arrow shown by the solid line in FIG. 11 and the shaft portion 37a and the pin 36b when the two-dot chain line is not misaligned). Further, the rotating member 35 can reasonably press the pin 36b while displaced the pin 36b in the radial direction of the tubular portion 35a (longitudinal direction of the notch portion 35d) during rotation. In this way, the rotating member 35 can rotate the link member 36 while shifting the engagement position of the pin 36b with respect to the notch portion 35d, so that the misalignment between the shaft portion 37a and the tubular portion 35a is absorbed. be able to. As a result, even if the shaft portion 37a and the tubular portion 35a are misaligned, it is possible to prevent the shaft portion 37a from being loaded when the rotating member 35 is rotated.
[0089]
　Here, as shown in FIGS. 5 and 6, in the accelerator operating mechanism 30, a friction plate 40 is provided so as to sandwich the fixing member 34, and the friction plate 40 is pressed against the support member 33 by the compression spring 41. There is. In such a configuration, when the operating member 31 is to be rotated, a frictional force is generated between the friction plate 40 and the fixing member 34. As a result, the friction plate 40 can hold the rotation position of the operation member 31 even if the hand is released from the operation member 31, so that other operation tools can be easily operated while the rotation speed of the engine 5 is adjusted. it can. Thereby, the operability of the tractor 1 can be improved.
[0090]
　Further, the frictional force generated between the friction plate 40 and the fixing member 34 varies depending on the amount of compression of the compression spring 41. Therefore, in the present embodiment, the amount of compression of the compression spring 41 can be adjusted by the adjusting mechanism 50.
[0091]
　Specifically, the adjusting mechanism 50 can move the plate 53 to the left by tightening the nut 55 on the right side to narrow the distance (distance in the left-right direction) between the spring receiving portion 51 and the cap 52. it can. As a result, the amount of compression of the compression spring 41 can be increased, and the frictional force generated between the friction plate 40 and the fixing member 34 can be increased. Further, the adjusting mechanism 50 can move the plate 53 to the right and widen the distance between the spring receiving portion 51 and the cap 52 by loosening the nut 55 on the right side. As a result, the amount of compression of the compression spring 41 can be reduced, and the frictional force generated between the friction plate 40 and the fixing member 34 can be reduced.
[0092]
　In this way, the adjusting mechanism 50 can easily adjust the frictional force generated between the friction plate 40 and the fixing member 34 simply by tightening or loosening the nut 55 on the right side.
[0093]
　The adjusting mechanism 50 also functions as a detent for the fixing member 34. Specifically, as shown in FIG. 7, in the low speed state, the rear stud 54 comes into contact with the swinging portion 34b of the fixing member 34 and moves in the clockwise direction (deceleration direction) when viewed from the right side of the fixing member 34. The rotation of is regulated. Further, as shown in FIG. 9, in the high speed state, the stud 54 on the front side comes into contact with the swinging portion 34b of the fixing member 34, and the fixing member 34 rotates in the counterclockwise direction (acceleration direction) when viewed from the right side. Is regulated. In this way, the adjusting mechanism 50 can also serve as a detent for the fixing member 34 (operating member 31) and for adjusting the frictional force of the friction plate 40, so that the number of parts can be reduced.
[0094]
　Next, the operation of the accelerator operation mechanism 30 when the rotation speed of the engine 5 is adjusted by the accelerator pedal 39 will be described. In the following, a case where the engine speed is increased from the case of the low speed state shown in FIG. 9 will be described as an example.
[0095]
　When the number of revolutions of the engine 5 is increased, the accelerator pedal 39 is depressed by the driver. As a result, as shown in FIG. 12, the cable 39a is pulled downward (see arrow C1 shown in FIG. 12). As a result, the pin 39c presses the rotating member 35 downward through the elongated hole 35e (see arrow C2 shown in FIG. 12).
[0096]
　As a result, the rotating member 35 rotates in the counterclockwise direction when viewed from the right side (see arrow C3 shown in FIG. 12). The shaft portion 37a of the link member 36 and the potentiometer 37 rotates in the counterclockwise direction when viewed from the right side (see arrow C4 shown in FIG. 12). The potentiometer 37 detects the amount of depression of the accelerator pedal 39 based on the amount of rotation of the shaft portion 37a, and increases the number of rotations of the engine 5 based on the detection result.
[0097]
　In this way, the accelerator operating mechanism 30 rotates the rotating member 35 when the accelerator pedal 39 is depressed so that the rotation speed of the engine 5 can be adjusted. According to this, since the detection of the rotation operation of the operating member 31 and the detection of the depression operation of the accelerator pedal 39 can be shared by the potentiometer 37, the number of parts can be reduced.
[0098]
　As described above, the tractor 1 (working vehicle) according to the embodiment of the present invention includes a steering post 9 that supports the steering wheel 8 and a dial-type operating member 31 that is provided on the steering post 9 and is rotated. It is provided with an accelerator operation mechanism 30 that adjusts the rotation speed of the engine 5 in response to the rotation operation of the operation member 31.
[0099]
　With this configuration, it is possible to suppress touching other operating tools when operating the operating member 31. Specifically, by providing the operating member 31 on the steering post 9 in which other operating tools are not provided so much, the operating member 31 can be provided at a sufficient distance from the other operating tools. In addition, the operating member 31 can be operated with a smaller movement than in the case of the lever type. As described above, it is possible to suppress touching other operating tools when operating the operating member 31.
[0100]
　Further, the accelerator operation mechanism 30 further includes a potentiometer 37 (detection member) for detecting the amount of rotation of the operation member 31.
[0101]
　With this configuration, if the rotation speed of the engine 5 is adjusted based on the detection result of the potentiometer 37, the operating member 31 can be operated with a small force.
[0102]
　Further, the accelerator operating mechanism 30 is arranged on the shaft 32 to which the operating member 31 is fixed, the fixing member 34 fixed to the shaft 32, and the radial outside of the shaft 32 with respect to the fixing member 34. The potentiometer 37 further includes a rotating member 35 that rotates with the rotation of the fixing member 34, and the potentiometer 37 detects the amount of rotation of the operating member 31 based on the amount of rotation of the rotating member 35. It is arranged coaxially with the rotating member 35.
[0103]
　With this configuration, the operating member 31 and the potentiometer 37 can be arranged so as to be offset in the radial direction of the shaft 32, so that the width of the accelerator operating mechanism 30 (the axial width of the shaft 32) can be reduced. it can.
[0104]
　Further, the accelerator operating mechanism 30 supports the rotating member 35 on one side surface (right surface), and further supports the potentiometer 37 on the other side surface (left surface) opposite to the one side surface. To have.
[0105]
　With this configuration, the rotating member 35 and the potentiometer 37 can be arranged in a well-balanced manner with the support member 33 interposed therebetween.
[0106]
　Further, the potentiometer 37 has a shaft portion 37a, and the rotation amount of the rotating member 35 is detected by rotating the shaft portion 37a, and the accelerator operating mechanism 30 is fixed to the shaft portion 37a. The link member 36 is engaged with the rotating member 35 so as to be displaceable in the radial direction of the rotating member 35, and rotates the shaft portion 37a with the rotation of the rotating member 35. Further has.
[0107]
　With this configuration, when the shaft portion 37a of the potentiometer 37 and the rotating member 35 are misaligned, the link member 36 can be displaced to absorb the misalignment. As a result, even if the shaft portion 37a of the potentiometer 37 and the rotating member 35 are misaligned, it is possible to suppress the load from being applied to the shaft portion 37a.
[0108]
　Further, the rotating member 35 engages with the link member 36 by a notch 35d formed in the outer edge portion.
[0109]
　With this configuration, the rotating member 35 can be engaged with the link member 36 by the notch 35d provided in the outer edge portion that is easy to process, so that the rotating member 35 can be engaged with the link member 36. It can be simplified.
[0110]
　Further, the cutout portion 35d is formed so as to extend in the radial direction of the rotating member 35.
[0111]
　With this configuration, the notch 35d having a simple shape can absorb the misalignment between the shaft portion 37a of the potentiometer 37 and the rotating member 35.
[0112]
　Further, the accelerator operating mechanism 30 further has a friction plate 40 that holds the rotational position of the operating member 31 by generating a frictional force with the fixing member 34.
[0113]
　With such a configuration, operability can be improved.
[0114]
　Further, the accelerator operating mechanism 30 includes a compression spring 41 (first urging member) that presses the friction plate 40 against the fixing member 34, and an adjusting mechanism 50 that can adjust the urging force of the compression spring 41. It also has.
[0115]
　With this configuration, if the urging force of the compression spring 41 is adjusted, the frictional force generated between the friction plate 40 and the fixing member 34 can be adjusted. Therefore, the frictional force generated between the friction plate 40 and the fixing member 34 can be easily adjusted.
[0116]
　Further, the accelerator operation mechanism 30 includes a return spring 38 (second urging member) that urges the rotating member 35 in a direction in which the rotation speed of the engine 5 decreases, and the rotating member via a cable 39a. It further has an accelerator pedal 39 which is connected to 35 and rotates the rotating member 35 by a stepping operation by the driver.
[0117]
　With this configuration, the cable 39a and the return spring 38 can be centrally attached to the rotating member 35. As a result, the accelerator pedal 39 and the return spring 38 can be provided without complicating the configuration.
[0118]
　The tractor 1 according to the present embodiment is an embodiment of the work vehicle according to the present invention.
　Further, the potentiometer 37 according to the present embodiment is an embodiment of the detection member according to the present invention.
　Further, the compression spring 41 according to the present embodiment is an embodiment of the first urging member according to the present invention.
　Further, the return spring 38 according to the present embodiment is an embodiment of the second urging member according to the present invention.
[0119]
　Although the operating member 31 is provided on the right side of the steering post 9, the arrangement position of the operating member 31 is not particularly limited. The operating member 31 may be provided, for example, on the left side of the steering post 9.
[0120]
　Further, the accelerator operating mechanism 30 does not necessarily have to include the potentiometer 37 as long as the rotation speed of the engine 5 can be adjusted. The accelerator operating mechanism 30 may, for example, connect the operating member 31 and the throttle valve of the engine 5 with a cable, and directly operate the throttle valve by rotating the operating member 31.
[0121]
　Further, the potentiometer 37 does not necessarily have to be connected to the rotating member 35 via the link member 36 when detecting the amount of rotation of the rotating member 35. In the potentiometer 37, for example, the shaft portion 37a may be fixed to the tubular portion 35a of the rotating member 35.
[0122]
　Further, the potentiometer 37 only needs to be able to detect the amount of rotation of the operating member 31, and does not necessarily have to indirectly detect the amount of rotation of the operating member 31 via the rotating member 35. In the potentiometer 37, for example, the shaft portion 37a may be fixed to the shaft 32 to directly detect the amount of rotation of the operating member 31.
[0123]
　Further, the support member 33 supports the rotating member 35 and the potentiometer 37 on two different side surfaces (left surface and right surface), but is not limited thereto, and for example, on one side surface, the rotation member 33 rotates. The moving member 35 and the potentiometer 37 may be supported.
[0124]
　Further, the rotating member 35 is assumed to engage with the pin 36b of the link member 36 by the notch 35d, but the configuration for engaging with the pin 36b is not limited to this, and for example, the rotating member 35 It may be engaged with the pin 36b by a hole penetrating the plate surface of the above.
[0125]
　Further, the accelerator operating mechanism 30 is designed to hold the rotating position of the operating member 31 by the friction plate 40, but the configuration for holding the rotating position is not limited to this, and various configurations may be used. Can be done.
[0126]
　Further, the adjusting mechanism 50 adjusts the compression amount of the compression spring 41 by utilizing the tightening of the nut 55, but the configuration for adjusting the compression amount of the compression spring 41 is not limited to this, and various types are used. Configuration can be used.
[0127]
　Further, the cable 39a and the return spring 38 of the accelerator pedal 39 are attached to the rotating member 35, but the present invention is not limited to this, and for example, the cable 39a and the return spring 38 may be attached to the fixing member 34. Further, the cable 39a and the return spring 38 do not necessarily have to be attached to the same member, and may be attached to different members.
[0128]
　Next, the configuration of the right portion of the living space 22a shown in FIG. 3 will be described.
[0129]
　As shown in FIGS. 3 and 13, a fender 10 (fender 10 on the right side), an operation unit 60 on the right side, a cover member 90, a bracket 100, and the like are provided on the right side of the living space 22a.
[0130]
　As shown in FIGS. 1 and 13, the fender 10 includes a main body member 11, a fender frame 12, a first thin plate 13 and a second thin plate 14.
[0131]
　The main body member 11 is a portion that covers the rear wheel 4 from above. The main body member 11 is formed so that its rear portion extends in the front-rear direction. Further, the front portion of the main body member 11 is formed in a substantially arc shape in a side view along the rear wheel 4. More specifically, the main body member 11 is formed so as to extend downward as it goes forward, and is formed in a substantially arc shape in a side view that bulges forward and upward.
[0132]
　The fender frame 12 shown in FIG. 13 is formed in a substantially arcuate shape along the front portion of the main body member 11. That is, the fender frame 12 is formed so as to extend downward as it goes forward, and is formed in a substantially arc shape in a side view bulging forward and upward. The main body member 11 is fixed to the lower portion of the fender frame 12. The fender frame 12 is composed of a metal square pipe. As shown in FIGS. 14 and 15, a stay 12a is attached to the fender frame 12.
[0133]
　The stay 12a has a front view having a portion formed so as to extend downward and a portion formed so as to extend to the left (inside the living space 22a in the left-right direction) from the end of the downwardly extending portion. It is formed in a substantially L shape. The upper end of the stay 12a is welded to the front and rear halfway portions on the left surface of the fender frame 12. As a result, the stay 12a is provided so as to project downward from the welded portion with the fender frame 12.
[0134]
　The first thin plate 13 shown in FIG. 13 is formed so as to extend along the fender frame 12. The first thin plate 13 is formed in a curved surface shape that bulges toward the inside of the living space 22a. The first thin plate 13 is provided at the lower part of the fender frame 12 and is arranged to the left of the main body member 11. The first thin plate 13 is formed by forming a resin into a thin plate shape that swells inward in the living space 22a. As shown in FIGS. 14 and 15, the first thin plate 13 includes a recess 13a.
[0135]
　The recess 13a is a recess that is recessed downward. The recess 13a is formed in the front-rear halfway portion of the first thin plate 13, and more specifically, in a portion overlapping the stay 12a in a side view. The recess 13a is formed from the upper right end portion of the first thin plate 13 to the vicinity of the left lower end portion. The stay 12a is arranged inside the recess 13a at the upper right end thereof. The lower left end of the recess 13a is located below the lower left end of the upper mounting portion 110 of the bracket 100, which will be described later.
[0136]
　The second thin plate 14 shown in FIG. 13 is formed in a substantially plate shape with its plate surface oriented in the left-right direction. The second thin plate 14 is formed in a substantially fan shape in a side view, and is provided below the first thin plate 13. The second thin plate 14 is composed of a metal plate-shaped member.
[0137]
　The right side operation unit 60 is an operation tool operated by the driver in the right part of the living space 22a. The right operation unit 60 includes a PTO lever 70 and an auxiliary control lever 80.
[0138]
　The PTO lever 70 is arranged in the middle of the front and rear of the fender 10 (rearward from the stay 12a). The PTO lever 70 shown in FIGS. 16 and 17 includes an operation unit 70a, an elevating unit 70b, and a detected unit 70c.
[0139]
　The operation unit 70a is a part operated by the driver. The operation portion 70a is formed so as to extend long in the front upper direction (rear lower direction), and the lower end portion thereof is supported by the swing shaft 71 so as to be swingable in the front-rear direction.
[0140]
　The elevating portion 70b is formed so as to project rearward and upward from the rear lower end portion of the operating portion 70a. After that, the upper end of the elevating portion 70b moves up and down (moves in the vertical direction) as the operation portion 70a swings. The elevating portion 70b is then connected to a PTO clutch (not shown) via a cable 72 connected to the upper end portion. Further, the elevating portion 70b is urged downward by attaching a spring 73. As a result, the operating unit 70a is urged rearward, that is, in a direction that cuts off the transmission of power to the PTO shaft that extracts rotational power to the outside.
[0141]
　The detected portion 70c is formed rearward and downward of the operating portion 70a with the swing shaft 71 interposed therebetween. The detected unit 70c swings in the front-rear direction as the operation unit 70a swings. A sensor 74 is provided in front of the detected unit 70c, and the sensor 74 detects the swing of the detected unit 70c and the operation unit 70a.
[0142]
　In such a configuration, the PTO lever 70 raises and lowers the elevating portion 70b by swinging the operating portion 70a in the front-rear direction. As a result, the PTO lever 70 can operate the PTO clutch via the cable 72 to switch whether or not power can be transmitted to the PTO shaft. Further, when the PTO lever 70 is swung in the front-rear direction, the detected portion 70c comes into contact with the sensor 74, or the contact state is released. As a result, the PTO lever 70 can grasp the operation state (swing position) of the operation unit 70a.
[0143]
　The auxiliary control lever 80 is arranged in front of the PTO lever 70 and to the left of the stay 12a. Further, three auxiliary control levers 80 are arranged at intervals in the front-rear direction. The auxiliary control lever 80 is connected to an auxiliary control valve (not shown) for hydraulically controlling the work equipment via the cylindrical member 81, the elevating member 82, and the cable 83 shown in FIG.
[0144]
　The cylindrical member 81 is rotatably supported by a bracket 100 described later. The lower end of the auxiliary control lever 80 is fixed to the outer peripheral surface of the cylindrical member 81. As a result, the auxiliary control lever 80 is configured to be swingable to the front right and the rear left.
[0145]
　The elevating member 82 is formed in a substantially plate shape, and its right front end is fixed to the outer peripheral surface of the cylindrical member 81. As the cylindrical member 81 rotates, the left rear end of the elevating member 82 moves up and down (swings in the vertical direction).
[0146]
　One end of the cable 83 is connected to the left rear end of the elevating member 82, and the other end is connected to the auxiliary control valve.
[0147]
　In such a configuration, the auxiliary control lever 80 is swung to the front right and the rear left to rotate the cylindrical member 81 and raise and lower the elevating member 82. As a result, the auxiliary control lever 80 can operate the auxiliary control valve via the cable 83 and hydraulically operate the working machine.
[0148]
　The cover member 90 shown in FIGS. 3 and 18 is for covering the lower portion of the right operation unit 60 and the like. The cover member 90 is formed so as to extend from the vicinity of the rear end portion of the fender 10 to the front and rear halfway portion (front of the stay 12a). As shown in FIGS. 18 and 19, the cover member 90 includes a first notch 91 and a second notch 92.
[0149]
　The first missing portion 91 is for guiding the PTO lever 70 (operation portion 70a). The first missing portion 91 is formed in a substantially rectangular shape in a plan view. The first completely missing portion 91 is formed in the front and rear halfway portion at the right end portion of the cover member 90.
[0150]
　The second notch 92 is for guiding the auxiliary control lever 80. The second notch 92 is formed by notching the right front end (outer edge) of the cover member 90 to the left rear. Three second notches 92 are formed at intervals in the front-rear direction.
[0151]
　The bracket 100 shown in FIGS. 13 and 16 is for supporting the right operation unit 60. The bracket 100 is provided in the middle of the front and rear of the fender 10. As shown in FIGS. 20 and 21, the bracket 100 includes an upper mounting portion 110, a supporting portion 120, a lower mounting portion 130, a reinforcing portion 140, and a shielding portion 150.
[0152]
　The upper mounting portion 110 is a portion for mounting the bracket 100 to the fender frame 12. As shown in FIGS. 14 and 15, the upper mounting portion 110 is formed in a shape in which the upper right end portion of the plate-shaped member whose longitudinal direction is directed to the upper right (lower left) is bent to the right. Most of the upper mounting portion 110 is arranged inside the recess 13a of the first thin plate 13 (except for the lower left end portion). The upper mounting portion 110 includes a fastened portion 111.
[0153]
　The fastened portion 111 is arranged with its plate surface facing in the vertical direction, and is configured to be able to fasten the bolt 111a. The fastened portion 111 is formed at the right end portion of the upper mounting portion 110. The fastened portion 111 is placed on the stay 12a of the fender frame 12.
[0154]
　The support portion 120 shown in FIGS. 20 and 21 is a portion that supports the right operation portion 60. The support portion 120 is arranged on the left side of the upper mounting portion 110. The support portion 120 includes a first support portion 121 and a second support portion 122.
[0155]
　The first support portion 121 shown in FIGS. 20 and 22 is a portion that supports the PTO lever 70. The first support portion 121 is formed in a shape in which the upper right end portion and the left lower end portion of the plate-shaped member whose plate surface is directed toward the upper left (lower right) are bent downward to the right. The first support portion 121 includes a lever guide portion 121a, a sensor mounting portion 121b, and a swing shaft mounting portion 121c.
[0156]
　The lever guide portion 121a shown in FIGS. 20 and 23 is a hole having a substantially rectangular shape in a plan view with its longitudinal direction directed in the front-rear direction. The lever guide portion 121a is formed at the upper end portion of the first support portion 121. The lever guide portion 121a is formed so that its front end portion and rear end portion project to the right in a plan view so that it can be engaged with the PTO lever 70.
[0157]
　The sensor mounting portion 121b shown in FIGS. 20 and 22 is a partially recessed portion in the lower left front portion of the first support portion 121.
[0158]
　The swing shaft mounting portion 121c is a hole that penetrates the plate surface of the first support portion 121. The swing shaft mounting portion 121c is arranged behind the sensor mounting portion 121b.
[0159]
　The second support portion 122 shown in FIGS. 20 and 21 is a portion that supports the auxiliary control lever 80. The second support portion 122 includes a mounting portion 122a and a lever mounting portion 122b.
[0160]
　The mounting portion 122a is a portion on which the lever mounting portion 122b, which will be described later, is mounted. The mounting portion 122a is formed in a substantially inverted L-shape in front view as if the right end portion of the plate-shaped member whose plate surface is directed in the vertical direction is bent downward. As shown in FIG. 22, the lower left end portion of the upper mounting portion 110 is welded to the right end portion of the mounting portion 122a. Further, in the mounting portion 122a, the first support portion 121 (sensor mounting portion 121b) is welded to the rear end portion via a predetermined plate-shaped member.
[0161]
　The lever mounting portion 122b shown in FIGS. 20 and 22 is for mounting on the mounting portion 122a and rotatably supporting the cylindrical member 81 of the auxiliary control lever 80. The lever mounting portion 122b is formed in a substantially plate shape with its plate surface facing the left front (right rear). Three lever mounting portions 122b are provided on the left front side (right rear side) at intervals from each other. The lever mounting portion 122b is provided with a through hole 122c that penetrates the plate surface.
[0162]
　The lower mounting portion 130 shown in FIGS. 20 and 21 is a portion for mounting the bracket 100 to the second thin plate 14. The lower mounting portion 130 is formed by appropriately bending one elongated longitudinal member. The lower mounting portion 130 includes a first plate portion 131, a second plate portion 132, and a third plate portion 133.
[0163]
　The first plate portion 131 is formed so as to extend substantially in the vertical direction at the rear end portion of the lower mounting portion 130. The upper end of the first plate portion 131 is attached to the lower end of the first support portion 121. The first plate portion 131 is formed so that its upper and lower middle portions are bent forward and downward and extend forward and downward.
[0164]
　The second plate portion 132 is formed so as to extend forward from the lower end portion of the first plate portion 131. The second plate portion 132 is arranged at the lower left of the second support portion 122. The rear end portion of the second plate portion 132 is located rearward of the rear end portion of the second support portion 122 in the front-rear direction. The front end portion of the second plate portion 132 is located at a position similar to that of the front end portion of the second support portion 122 in the front-rear direction. In this way, the second plate portion 132 is formed so as to extend over the space below the second support portion 122. The second plate portion 132 includes a guide portion 132a.
[0165]
　The guide portion 132a is a notch formed in a substantially U-shape in a plan view. The guide portion 132a is formed in the front and rear halfway portion of the second plate portion 132. Three guide portions 132a are formed at intervals in the front-rear direction.
[0166]
　The third plate portion 133 is formed so as to extend downward from the front end portion of the second plate portion 132.
[0167]
　The reinforcing portion 140 shown in FIGS. 21 and 22 is for reinforcing the second support portion 122. The reinforcing portion 140 is formed in a substantially plate shape and is formed so as to extend in the vertical direction. The upper end of the reinforcing portion 140 is welded to the second support portion 122 (mounting portion 122a), and the lower end portion thereof is welded to the lower mounting portion 130 (second plate portion 132).
[0168]
　The shielding portion 150 is for making the inside of the cover member 90 difficult to see from the driver. The shielding portion 150 is formed by appropriately bending a plate-shaped member whose plate surface faces in the vertical direction. The shielding portion 150 includes an overlapping portion 151, a rear bending portion 152, and a front bending portion 153.
[0169]
　The overlapping portion 151 is a portion in which the plate surface is arranged so as to be substantially vertically oriented. As shown in FIGS. 23 and 24, the right end portion of the overlapping portion 151 is welded to the upper and lower intermediate portions of the upper mounting portion 110. As a result, the overlapping portion 151 is provided so as to overlap the left portion (left side of the welded portion) of the upper mounting portion 110 in a plan view.
[0170]
　The posterior bent portion 152 shown in FIGS. 20 and 21 is a portion that is bent upward at the rear end portion of the overlapping portion 151. The upper end of the posterior bent portion 152 is welded to the first support portion 121 via a predetermined plate-shaped member.
[0171]
　The front bent portion 153 is a portion bent downward at the front end portion of the overlapping portion 151. The lower end of the front bent portion 153 is welded to the front end of the second support portion 122 (mounting portion 122a).
[0172]
　As shown in FIG. 14, the bracket 100 configured in this way is attached to the fender frame 12 and the second thin plate 14. Specifically, the bracket 100 is attached to the fender frame 12 by fastening the bolt 111a to the stay 12a and the fastened portion 111 of the upper mounting portion 110. Further, the bracket 100 is attached to the second thin plate 14 by fastening bolts to the first plate portion 131 (lower end portion) and the third plate portion 133 (up and down middle portion) of the lower mounting portion 130.
[0173]
　Further, as shown in FIG. 17, in the first support portion 121, the PTO lever 70 is inserted through the lever guide portion 121a, and the swing shaft 71 is mounted on the swing shaft mounting portion 121c. As a result, the first support portion 121 oscillatingly supports the PTO lever 70. Further, in the first support portion 121, the cable 72 is inserted through the lower left end portion thereof to guide the cable 72. Further, a spring 73 is attached to the left lower end portion (front of the portion through which the cable 72 is inserted) of the first support portion 121. Further, in the first support portion 121, the sensor 74 is mounted on the back surface (lower right lower surface) of the sensor mounting portion 121b.
[0174]
　Further, as shown in FIGS. 16 and 20, in the second support portion 122, a shaft member is inserted into the through hole 122c of the lever mounting portion 122b, and the cylindrical member 81 is rotatably supported via the shaft member. .. As a result, the second support portion 122 supports the auxiliary control lever 80 so as to be swingable. Further, in the lower mounting portion 130, the cable 83 of the auxiliary control lever 80 is inserted through the guide portion 132a. As a result, the lower mounting portion 130 guides the cable 83.
[0175]
　As described above, the bracket 100 is provided on the fender 10 and supports the right operating portion 60. The bracket 100 is covered by a cover member 90, as shown in FIGS. 3 and 18. In this state, the overlapping portion 151 of the shielding portion 150 is arranged to the right of the second notch portion 92 of the cover member 90 in a plan view.
[0176]
　The bracket 100 according to the present embodiment is provided on the fender 10 by being attached to the fender frame 12 and the second thin plate 14, that is, a metal member. According to this, the load acting on the bracket 100 from the right side operation unit 60 (PTO lever 70 and auxiliary control lever 80) can be received by a metal member having higher rigidity than resin. As a result, it is possible to suppress the bracket 100 from wobbling when the right side operation unit 60 is operated (swinged), and the rigidity of the bracket 100 can be ensured. Further, since the upper portion of the bracket 100 is attached to the fender frame 12, most of the load acting on the bracket 100 from the right operating portion 60 is received by the fender frame 12, that is, the member having the highest rigidity in the fender 10. be able to. Therefore, it is possible to easily secure the rigidity of the bracket 100 when the right side operation unit 60 is operated.
[0177]
　Further, in the bracket 100, the upper mounting portion 110, the supporting portion 120 (first supporting portion 121 and the second supporting portion 122), the lower mounting portion 130, the reinforcing portion 140 and the shielding portion 150 are integrally formed by welding. There is. As a result, it is not necessary to fasten a plurality of plate-shaped members with bolts to assemble the bracket 100, so that the variation in the assembly dimensional error can be effectively reduced and the number of parts can be effectively reduced.
[0178]
　Further, as described above, the bracket 100 can receive most of the load acting from the right operation unit 60 by the fender frame 12. In such a configuration, the lower mounting portion 130 is not required to have very high rigidity. Therefore, as shown in FIG. 16, in the present embodiment, the lower mounting portion 130 is formed by appropriately bending one elongated longitudinal member. According to this, the bracket 100 can be attached to the second thin plate 14 by the easily formable lower attachment portion 130, so that the cost can be reduced.
[0179]
　Further, the bracket 100 can reinforce the second support portion 122 by the reinforcing portion 140 welded to the second support portion 122 and the second plate portion 132. Therefore, it is possible to prevent the second support portion from wobbling when the auxiliary control lever 80 is operated.
[0180]
　Further, as shown in FIG. 15, the stay 12a of the fender frame 12 is arranged inside the recess 13a of the first thin plate 13. According to this, the fender frame 12 and the upper mounting portion 110 can be made difficult to see from the driver. As a result, the attachment portion between the fender frame 12 and the bracket 100 can be made inconspicuous. Further, in the present embodiment, the upper end portion of the stay 12a is attached to the fender frame 12, so that most of the stay 12a is arranged inside the recess 13a. As a result, the attachment portion between the fender frame 12 and the bracket 100 can be made less noticeable.
[0181]
　Further, in the present embodiment, by forming the recess 13a up to the vicinity of the left lower end portion of the first thin plate 13, most of the upper mounting portion 110 is arranged inside the recess 13a (excluding the left lower end portion). There is. According to this, the upper mounting portion 110 can be made more difficult to see from the driver.
[0182]
　Further, as shown in FIG. 18, the shielding portion 150 is arranged so as to overlap the left portion of the upper mounting portion 110 in a plan view. Further, the shielding portion 150 is arranged on the right side of the second notch portion 92 of the cover member 90. As a result, the shielding portion 150 is provided so as to fill the gap between the fender 10 and the cover member 90. According to this, it is possible to make it difficult to see the inside of the cover member 90. In particular, when the second cutout portion 92 is formed by cutting out the outer edge portion of the cover member 90 as in the present embodiment, the inside (upper side) of the cover member 90 can be seen by looking into the second cutout portion 92 from above. Where the mounting portion 110) is easily visible, the shielding portion 150 makes it difficult to see the inside of the cover member 90. As a result, it is possible to easily form the second notch 92 and suppress the appearance from being spoiled as much as possible.
[0183]
　Further, the shielding portion 150 is welded to the upper mounting portion 110, the first support portion 121, and the second support portion 122. As a result, the shielding portion 150 can reinforce the first support portion 121 and the second support portion 122.
[0184]
　Further, in the lower mounting portion 130, a plurality of locations (first plate portion 131 and third plate portion 133) are mounted on the second thin plate 14. As a result, the lower mounting portion 130 can be supported in a well-balanced manner, so that it is possible to prevent the right operating portion 60 from wobbling when the right operating portion 60 is operated.
[0185]
　The outline of the present invention is listed below based on the above-described embodiment of the bracket 100.
[0186]
　Conventionally, a technique of a work vehicle provided with an operation unit provided on a fender has been known (see, for example, Japanese Patent Application Laid-Open No. 2015-188430).
[0187]
　In the conventional work vehicle (tractor), the fender is provided with a PTO clutch switch, a plurality of hydraulic operation levers, and the like as an operation unit. The fender includes a main body member (rear fender) that covers the rear wheels, a fender frame to which the main body member is fixed at the lower part, and a thin plate provided at the lower part of the fender frame (the side closer to the cockpit than the main body member). To do. The operation unit is supported by the fender via a bracket. The bracket is attached to, for example, a thin plate of a fender by fastening the fastening member.
[0188]
　In such a configuration, the thin plate receives the load acting on the bracket from the operation portion. In this case, for example, if the thin plate is made of resin, the rigidity of the thin plate becomes low, and when the operation unit is operated, the thin plate may be elastically deformed and the bracket may wobble. As described above, in the conventional work vehicle, there is a possibility that the rigidity (rigidity of the bracket) when the operation portion is operated cannot be secured.
[0189]
　The present invention has been made in view of the above circumstances, and an object of the present invention to be solved is to provide a work vehicle capable of ensuring the rigidity of the bracket when the operation unit is operated. To do.
[0190]
　The work vehicle (tractor 1) according to the present embodiment of the present invention has a fender frame 12, a first thin plate 13 provided below the fender frame 12, and a second thin plate 14 provided below the first thin plate 13. It includes a fender 10, an operation unit (right side operation unit 60) provided on the fender 10, and a bracket 100 attached to the fender frame 12 and the second thin plate 14 to support the operation unit. is there.
[0191]
　With this configuration, the load acting on the bracket 100 from the right operation unit 60 can be received at a plurality of locations (fender frame 12 and second thin plate 14), and most of the load can be received by the highly rigid fender frame. You can receive it at 12. As a result, the rigidity of the bracket 100 when the right side operation unit 60 is operated can be ensured.
[0192]
　Further, the operation unit includes a PTO lever 70 for switching whether or not power can be transmitted to a PTO shaft (rotary shaft) for extracting rotational power to the outside, and an auxiliary control lever 80 for controlling a hydraulically operated work machine. The bracket 100 includes a support portion 120 having a first support portion 121 that supports the PTO lever 70 and a second support portion 122 that supports the auxiliary control lever 80. ..
[0193]
　With this configuration, the PTO lever 70 and the auxiliary control lever 80 can be collectively supported by the support portion 120.
[0194]
　Further, the bracket 100 is further provided with a lower mounting portion 130 which is formed by bending one longitudinal member and is mounted on the second thin plate 14.
[0195]
　With this configuration, the bracket 100 can be attached to the second thin plate 14 by the lower attachment portion 130 having a simple shape. As a result, the cost can be reduced.
[0196]
　Further, the first support portion 121 is arranged behind the second support portion 122, and the lower mounting portion 130 is formed so as to extend in the vertical direction and is attached to the first support portion 121. The first plate portion 131, the second plate portion 132 formed so as to extend forward from the lower end portion of the first plate portion 131, and provided so as to extend over the space below the second support portion 122, and the above. It has a third plate portion 133 that is formed so as to extend downward from the front end portion of the second plate portion 132 and is attached to the second thin plate 14.
[0197]
　With this configuration, the bracket 100 can be attached to the second thin plate 14 by the lower attachment portion 130 having a simple shape.
[0198]
　Further, the second plate portion 132 has a guide portion 132a for guiding the cable 83 connected to the auxiliary control lever 80.
[0199]
　With this configuration, the lower mounting portion 130 can be used for both mounting on the second thin plate 14 and guiding the cable 83. As a result, the number of parts can be reduced.
[0200]
　Further, the bracket 100 further includes a reinforcing portion 140 provided so as to extend between the second support portion 122 and the second plate portion 132.
[0201]
　With this configuration, the second support portion 122 can be reinforced by the reinforcing portion 140, so that the rigidity of the second support portion 122 when the right operation portion 60 is operated can be ensured.
[0202]
　Further, the fender frame 12 further includes a stay 12a that supports the bracket 100, and the stay 12a is arranged inside a recess 13a formed in the first thin plate 13.
[0203]
　With this configuration, the attachment portion between the fender frame 12 and the bracket 100 can be made inconspicuous.
[0204]
　Further, the bracket 100 further has an upper mounting portion 110 that is mounted on the stay 12a while being mounted on the stay 12a.
[0205]
　With this configuration, the bracket 100 can be easily attached to the stay 12a.
[0206]
　Further, the bracket 100 is arranged so as to overlap with at least a part of the upper mounting portion 110 in a plan view, and further includes a shielding portion 150 arranged above the upper mounting portion 110. ..
[0207]
　With this configuration, the upper mounting portion 110 can be made difficult to see.
[0208]
　Further, the shielding portion 150 is supported by the first supporting portion 121 and the second supporting portion 122.
[0209]
　With this configuration, the first support portion 121 and the second support portion 122 can be reinforced by the shielding portion 150, so that the first support portion 121 and the second support portion when the right operation portion 60 is operated can be reinforced. The rigidity of 122 can be secured.
[0210]
　The tractor 1 according to the present embodiment is an embodiment of the work vehicle according to the present invention.
　Further, the right side operation unit 60 according to the present embodiment is an embodiment of the operation unit according to the present invention.
[0211]
　The bracket 100 may support the operating tool provided on the fender 10, and does not necessarily support the PTO lever 70 and the auxiliary control lever 80.
[0212]
　Further, the first support portion 121 and the second support portion 122 do not necessarily have to be integrally formed, and may be assembled from a plurality of members by appropriately fastening bolts or the like.
[0213]
　Further, the lower mounting portion 130 may be mounted on the second thin plate 14, and its shape and mounting location on the second thin plate 14 are not limited to the present embodiment.
[0214]
　Further, the stay 12a does not necessarily have to be arranged inside the recess 13a as long as the fender frame 12 and the upper mounting portion 110 can be connected.
[0215]
　Further, the fastened portion 111 does not necessarily have to be mounted on the stay 12a as long as the bolt 111a can be fastened to the stay 12a.
[0216]
　Further, the shielding portion 150 is welded to the upper mounting portion 110, the first support portion 121, and the second supporting portion 122, but the portion to which the shielding portion 150 is welded is not limited to this. It can be appropriately changed according to the shape of the shielding portion 150 and the positional relationship with other members.
Industrial applicability
[0217]
　INDUSTRIAL APPLICABILITY The present invention can be used in the technology of a work vehicle provided with an accelerator operating mechanism that adjusts the engine speed according to the operation of an operating member.
Description of the sign
[0218]
　1 Tractor (work vehicle)
　5 Engine
　8 Steering wheel
　9 Steering post
　30 Accelerator operating mechanism
　31 Operating member
The scope of the claims
[Request item 1]

　An accelerator operating mechanism that has 　a steering post that supports the steering wheel and a dial-type operating member that is provided on the steering post and is operated to rotate, and adjusts the engine speed according to the rotational operation of the operating member. And,
　equipped with a
　work vehicle.
[Request item 2]
　The work vehicle according to claim 1, 　wherein the accelerator operation mechanism
　further includes a detection member for detecting the amount of rotation of the operation member
.
[Request item 3]
　The accelerator operating mechanism,
　a shaft the operating member is fixed,
　a fixed member fixed to the shaft,
　is located radially outwardly of said shaft relative to said stationary member, according to the rotation of the fixing member The 　detection member
　further includes a rotating member that rotates in the same direction, and the
detection member
　detects the amount of rotation of the operating member based on the amount of rotation of the rotating member, and is coaxial with the rotating member.
　The work vehicle according to claim 2 , which is arranged .
[Request item 4]
　The work vehicle according to claim 3, 　wherein the accelerator operating mechanism further includes a
　support member that supports the rotating member on one side surface and further supports the detection member on the other side surface opposite to the one side surface
.
[Request 5]
　The detection member has a
　shaft portion, and the rotation amount of the rotating member is detected by rotating the 　shaft portion,
　and the accelerator operating mechanism is
fixed to the shaft portion and the rotating member.
　3. Or claim 4, further comprising a link member that is engaged with the rotating member so as to be displaceable in the radial direction of the shaft and rotates the shaft portion with the rotation of the rotating member. The listed work vehicle.
[Request item 6]
　The work vehicle according to claim 5, 　wherein the rotating member
　engages with the link member by a notch formed in an outer edge portion
.
[Request 7]
　The work vehicle according to claim 6, 　wherein the cutout portion is
　formed so as to extend in the radial direction of the rotating member
.
[Request 8]
　Any one of claims 3 to 7 　, wherein the accelerator operating mechanism
　further includes a friction plate that holds a rotational position of the operating member by generating a frictional force with the fixing member.
Work vehicle described in.
[Request 9]
　8. The accelerator operating mechanism according
　to 　claim 8, 　further
　comprising a first urging member that presses the friction plate against the fixing member, and an adjusting mechanism that can adjust the urging force of the first urging member. Work vehicle.

[Request item 10]
　The accelerator operating mechanism is 　connected to the rotating member via a cable
　and a second urging member that urges the rotating member in a direction in which the rotation speed of the engine decreases
, and the driver steps on the rotating member. 　The work vehicle according to any one of claims 3 to 9
　, further comprising an accelerator pedal for rotating a rotating member