Claims:CLAIMS
We claim,
1. A blade assembly 100 for a tillage implement, said tillage implement having a frame, and at least one first rotary shaft 124 mounted within said frame, comprising:
at least one first flange 102 coupled to said first rotary shaft 124, said first flange 102 defines a plurality of apertures 106 and a plurality of slots 108 at predetermined locations;
a plurality of first blade 110 and a plurality of second blade 112 coupled to said first flange 102, said first blade 110 and said second blade 112 having a first end F and a second end S;
at least one fastening means to connect said first end F of said first blade 110 and said second blade 112, and said second end S of said first blade 110 to said first flange 102 through said plurality of first apertures 104, and to connect said second end S of said second blade 112 to said first flange 102 through said plurality of slots 108; and
at least one spring 114 disposed between said second end S of said second blade 112 and said first end F of said first blade 110,
wherein,
said plurality of slots 108 are defined such that it allows said second end S of said second blade 112 to slide or move from a first position to a second position during a collision with an obstacle.
2. A blade assembly 100 for a tillage implement, said tillage implement having a frame, and at least one first rotary shaft 124 and at least one second rotary shaft 122 mounted within said frame, comprising:
at least one first flange 102 coupled to said first rotary shaft 124 and at least one second flange 104 coupled to said second rotary shaft 122, said first flange 102 and said second flange 104 defines a plurality of apertures 106 and a plurality of slots 108 at predetermined locations;
a plurality of first blade 110 and a plurality of second blade 112 coupled to said first flange 102 and said second flange 104, said first blade 110 and said second blade 112 having a first end F and a second end S;
at least one fastening means 116 adapted to connect said first end F of said first blade 110 and said second blade 112, and said second end S of said first blade 110 to said first flange 102 and said second flange 104 through said plurality of first apertures 104, and to connect said second end S of said second blade 112 to said first flange 102 and said second flange 104 through said plurality of slots 108; and
at least one spring 114 disposed between said second end S of said second blade 112 and said first end F of said first blade 110,
wherein,
said plurality of slots 108 are defined such that it allows said second end S of said second blade 112 to slide or move from a first position to a second position during a collision with an obstacle.
3. The blade assembly 100 as claimed in claim 1, wherein said first position is a position where said second blade 112 is not deflected (i.e. original position) and said second position is a position where said second blade 112 is deflected from its original position (i.e. moved position).
4. The blade assembly 100 as claimed in claim 1, wherein said at least one first rotary shaft 124 is configured to rotate in forward direction Fd and said at least one second rotary shaft 122 is configured to rotate in reverse direction Rd, said first rotary shaft 124 and said second rotary shaft 122 include a rotational axis A which are parallel to each other.
5. The blade assembly 100 as claimed in claim 1, wherein said first blades 110 includes a blade body 118 bent towards top side and said second blades 112 includes a blade body 120 bent towards bottom side with respect to said rotational axis A.
6. The blade assembly 100 as claimed in claim 1, wherein said spring 114 includes a first end 114a and a second end 114b, said first end 114a of said spring 114 is connected to said second end S of said second blade 112 and said second end 114b of said spring 114 is connected to said first end F of said first blade 110.
7. The blade assembly100 as claimed in claim 1, wherein said spring 114 is a pre-stressed/pretension coil spring having predetermined tension or stress.
8. The blade assembly100 as claimed in claim 1, wherein said spring 114 is configured to expand upon colliding with said obstacle and retract upon surpassing said obstacle.
9. The blade assembly100 as claimed in claim 1, wherein said second end S of said second blade 112 is adapted to deflect or move in upward direction upon colliding with said obstacle and move downward due to tension or stress exerted by said coil spring 114 which holds said second end S of said second blade 112 in said original position.
10. The blade assembly100 as claimed in claim 1, wherein said plurality slots 108 are configured to allow said second end S of said second blade 112 to deflect within a predetermined limit.
11. The blade assembly100 as claimed in claim 1, wherein said second end S of said second blade 112 is configured to move or deflect when a mechanical force acting on said second blade 112 is higher than said tension or stress exerted by said coil spring 114 which holds said second end S of said second blade 112 in said original position, said mechanical force acting on said second blade 112 is collision of said second blade 112 with said obstacle.

, Description:TECHNICAL FIELD
[001] The embodiments herein generally relate to tillage implements. More particularly, but not exclusively to a blade assembly for a tillage implement in which the blades are adapted to turn aside or deflect during a collision with an obstacle.

BACKGROUND
[002] Farmers utilize a wide variety of agricultural tillage implements to prepare soil for planting. Some of the implements include two or more sections coupled together to perform multiple functions as they are pulled through the fields by an agricultural vehicle such as a tractor. A conventional agricultural implement includes a driven shaft, on which are mounted a plurality of rotary tillage members having soil engaging blades. The blades erupt the soil from below a seed depth to upwards or ground surface so as to open up the soil and pulverize the soil to a desired condition.
[003] Blades of the rotary tillage members get damaged when they encounter hard objects (for example, stones, rocks, roots, and so on) which are usually present abundantly in fields. The blades when pressed against hard objects they either bend or break or disengage from the rotating shaft or suffer other serious damage which is undesirable. This sequentially affects the life of the tillage members.
[004] Therefore, there exists a need for a blade assembly for a tillage implement in which the blades are adapted to turn aside or deflect during a collision with an obstacle to prevent blade breakage, and which eliminates the aforementioned drawbacks.

OBJECTS
[005] The principal object of the embodiments disclosed herein is to provide a blade assembly for a tillage implement in which the blades are adapted to turn aside or deflect during a collision with an obstacle to prevent blade breakage or blade damage.
[006] Another object of the embodiments disclosed herein is to provide a blade assembly for tillage implement having a first rotary shaft and a second rotary shaft and a plurality of blades coupled to the first rotary shaft and the second rotary shaft, in which the blades of the first rotary shaft and the second rotary shaft are adapted to deflect or move away to increase a gap to surpass the obstacles during a soil operation to prevent blade breakage or blade damage.
[007] These and other objects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.

BRIEF DESCRIPTION OF DRAWINGS
[008] The embodiments herein are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[009] FIG. 1 depicts a schematic of a blade assembly for a tillage implement, according to an embodiment as disclosed herein;
[0010] FIG. 2 depicts a perspective view of a blades coupled to a flange, according to an embodiment as disclosed herein;
[0011] FIG. 3 depicts a perspective view of the blade assembly having plurality of second blades assembled to a flange, according to an embodiment as disclosed herein;
[0012] FIG. 4 depicts a top view of the flange of the blade assembly, according to an embodiment as disclosed herein;
[0013] FIG. 5 depicts a top view of the blade assembly having plurality of second blades assembled to the flange, according to an embodiment as disclosed herein; and
[0014] FIG. 6 depicts a bottom view of the blade assembly having plurality of second blades assembled to the flange, according to an embodiment as disclosed herein.

DETAILED DESCRIPTION
[0015] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0016] The embodiments herein disclose a blade assembly for a tillage implement in which the blades are adapted to turn aside or deflect during a collision with an obstacle to prevent blade breakage or blade damage. Further, the embodiments herein achieve a blade assembly for tillage implement having a first rotary shaft and a second rotary shaft and a plurality of blades coupled to the first rotary shaft and the rotary second shaft, in which the blades of the first rotary shaft and the second rotary shaft are adapted to deflect or move away to increase a gap to surpass the obstacles during a soil operation to prevent blade breakage or blade damage. Referring now to the drawings and more particularly to FIGS. 1 through FIG. 6, where similar reference characters denote corresponding features consistently throughout the figures, there are shown embodiments.
[0017] FIG. 1 depicts a schematic of a blade assembly for a tillage implement, according to an embodiment as disclosed herein. In an embodiment, the blade assembly 100 for a tillage implement includes a frame (not shown), a first rotary shaft 124, a second rotary shaft 122, at least one first flange 102, at least one second flange 104, a plurality of first apertures 106 (as shown in FIG. 4), a plurality of slots 108 (as shown in FIG. 4), a plurality of first blade 110 (as shown in FIG. 2), a plurality of second blade 112 (as shown in FIG. 2), the first blade 110 and the second blade 112 having a first end F and a second end S (as shown in FIG. 3), at least one spring 114 (as shown in FIG. 3), and at least one fastening means 116 (as shown in FIG. 3).
[0018] In an embodiment, the tillage implement (not shown) is pulled by the tractor. The tractor has a conventional power take-off shaft (not shown) extending rearward from its body and a drawbar structure mounted on the underside of the body and extending rearward from the tractor to terminate at its rearward end in a clevis type connection (not shown). These and all other features of the tractor are conventional and consequently details are neither shown nor described relative to those features.
[0019] The tillage implement includes the frame (not shown). The frame is composed of a front transverse beam (not shown) extending across the front end of the agricultural implement. In an embodiment, the frame is configured to be connected to the clevis by means of a pin (not shown). In an embodiment, the frame may be adjusted vertically and relative to the ground. The tillage implement includes the drive shaft (not shown). In an embodiment, the drive shaft (not shown) is rotated by the driving means (not shown). The driving means is rotated by a power take-off unit (PTO) of the tractor. The power take-off unit produces a torque T.
[0020] The tillage implement includes at least one first rotary shaft 124. The first rotary shaft 124 is disposed in the frame. The first rotary shaft 124 is driven by the drive shaft (not shown) through the drive shaft gear wheel (not shown). The first rotary shaft 124 includes the at least one first flange 102. In an embodiment, the first rotary shaft 124 may include a plurality of first flanges 102. At least one first blade 110 and at least one second blade 112 is coupled or connected to each of the flanges 102. In an embodiment, each of the flanges 102 may include a plurality of first blades 110 and a plurality of second blades 112. In an embodiment, the plurality of first flanges 102 is rotated in a forward direction Fd. However, it is also within the scope of the invention to provide any rotation direction for the plurality of first flange 102 without otherwise deterring the intended function of the rotation as can be deduced from this description and corresponding drawings. The first flange 102 further includes the plurality of apertures 106 and the plurality of slots 108. The plurality of apertures 106 and the plurality of slots 108 are defined at predetermined locations of the first flange 102 as shown in FIG. 4. Each of the aperture 106 is adapted to receive a fastening means 116 to secure the blade 110 and 112 to the first flange 102. Further, the plurality of slots 108 are formed in such a way that it allows the second end S of the second blade 112 to move or deflect within a predetermined limit defined by the slot 108.
[0021] The tillage implement includes at least one second rotary shaft 122. The second rotary shaft 122 is disposed in the frame. The second rotary shaft 122 is driven by one of the drive shafts (not shown) through the drive shaft gear wheel (not shown) or by the first shaft gear wheel (not shown). At least one second flange 104 is coupled to the second rotary shaft 122. In an embodiment, the second rotary shaft 122 may include a plurality of second flanges 104. The plurality of second flanges 104 includes the plurality of first blades 110 and the plurality of second blades 112 as shown in FIG. 2. The plurality of second flange 104 is rotated in reverse direction Rd. However, it is also within the scope of the embodiments herein to provide any rotation direction for the plurality of second flange 104 without otherwise deterring the intended function of the rotation as can be deduced from this description and corresponding drawings. The second flange 104 further includes the plurality of apertures 106 and the plurality of slots 108. The plurality of apertures 106 and the plurality of slots 108 are defined at predetermined locations of the second flange 104 as shown in FIG. 4. Each of the aperture 106 is adapted to receive a fastening means 116 to secure the blade 110 and 112 to the second flange 104. Further the plurality of slots 108 are formed in such a way that it allows the second end S of the second blade 112 to move or deflect within a predetermined limit defined by the slot 108.
[0022] For the purpose of this description and ease of understanding, the tillage implement is explained herein below with reference to be provided in an agricultural vehicle. However, it is also within the scope of the invention to assemble the blade assembly 100 in a single rotor shaft tillage implement without otherwise deterring the intended function of the tilling the soil as can be deduced from the description and corresponding drawings.
[0023] In an embodiment, the first rotary shaft 124 and the second rotary shaft 122 are configured to rotate in opposite directions. Further, the first rotary shaft 124 and the second rotary shaft 122 includes rotational axis A which are parallel to each other.
[0024] The first blade 110 and the second blade 112 include a first end F and a second end S as shown in FIG. 3. In an embodiment, the blades 110 and 112 are fabricated in a shape selected from a group comprising L shape, C shape and J shape. However, it is also within the scope of the invention to provide any shape of blade for fabricating the blade without otherwise deterring the intended function of the tilling as can be deduced from this description and corresponding drawings. In an embodiment, the first blades 110 of the first flange 102 and the second flange 104 includes a blade body 118 which is bent towards top side (as shown in FIG. 2) of the first and second flanges 102 and 104 with respect to the rotational axis A of the first rotary shaft 124 and the second rotary shaft 122. Similarly, the second blades 112 of the first flange 102 and the second flange 104 includes a blade body 120 which is bent towards bottom side (as shown in FIG. 2) of the first and second flanges 102 and 104 with respect to the rotational axis A of the first rotary shaft 124 and the second rotary shaft 122.
[0025] FIG. 3 depicts a perspective view of the blade assembly having plurality of second blades assembled to a flange, according to an embodiment as disclosed herein. The tillage implement includes the at least one fastening means 116. In an embodiment, the fastening means 116 is a bolt and nut assembly. However, it is also within the scope of the invention to provide any type of fastening means without otherwise deterring the intended function of coupling as can be deduced from this description and corresponding drawings. The fastening means 116 is configured to connect the first end F of the first blade 110 and the second blade 112, and the second end S of the first blade 110 to the first flange 102. Similarly, the fastening means 116 is configured to connect the first end F of the first blade 110 and the second blade 112, and the second end S of the first blade 110 to the second flange 104. The fastening means 116 is configured to pass through the plurality of first apertures 104 to connect the blades 110 and 112 with the flanges 102 and 104 respectively. Further, the fastening means 116 is configured to connect the second end S of the second blade 112 to the first flange 102 through the plurality of slots 108. Similarly, the fastening means 116 is configured to connect the second end S of the second blade 112 to the second flange 104 through the plurality of slots 108. The plurality of slots 108 are defined such that it allows the second end S of the second blade 112 to slide or move from a first position to a second position during a collision with the obstacle. In an embodiment, the first position is a position where the second blade 112 is not deflected (i.e. original position) and the second position is a position where the second blade 112 is deflected from its original position (i.e. moved position).
[0026] FIGS. 5 and 6 depict a top and bottom views of the blade assembly having plurality of second blades assembled to the flange, according to an embodiment as disclosed herein. The tillage implement includes the at least one pre-stressed/pretension spring 114. The spring 114 is coupled between the second end S of the second blade 112 and the first end F of the first blade 110. In an embodiment, the pre-stressed/pretension spring is a coil spring 114 having a first end 114a and a second end 114b. The coil spring 114 includes at least one of vertical spring axis, horizontal axis and/or may include an inclined axis (not shown) passing concentrically there through. The first end 114a of the spring 114 is connected to the second end S of the second blade 112. Similarly, the second end 114b of the spring 114 is connected to the first end F of the first blade 110. The spring 112 is a pre-stressed/pretension coil spring having predetermined tension or stress. The spring 114 is configured to expand upon colliding with the obstacles and is configured to retract or move to original position upon surpassing the obstacle. The second end S of the second blades 112 are held in their original position by the coil spring 114. In an embodiment, second end S of the second blade 112 is configured to move/displace when a mechanical force acts on second end S of the second blades 112 (due to the impact with the obstacle) which is higher than a predetermined force through which the second end S of the second blades 112 are held in their original position. For example, the force required to deflect the second end S of second blade 112 may range from 1000 N to 4000 N. In an embodiment, the second end S of the second blade 112 is adapted to deflect in upward direction upon colliding with the obstacle. In an embodiment, the movement or deflection of the second blades 112 generates a gap between the blades of the first rotary shaft 124 and the second rotary shaft 122 so that it allows any obstacle to pass through the blades to avoid blade breakage or blade damage. For example, a gap of 14 to 15 mm each side may be generated, i.e. a 30 mm displacement in total may be obtained when the blades in the first rotary shaft 124 and the second rotary shaft 122 moves away during collision with the obstacle. Further, the gap value may be adjusted for different configurations.
[0027] In an embodiment, the coil spring 114 is a high-tension spring. However, it is also within the scope of the embodiments herein to use any type of spring having either high or low tension without otherwise deterring the intended function of expansion and/or compression as can be deduced from the description and corresponding drawings. In an embodiment, the spring 114 is connected between the second end S of the second blade 112 and the first end F of the first blade 110 on both the sides of the first and second flanges 102 and 104.
[0028] The technical advantages disclosed by the embodiments herein are, the tillage implement mixes and pulverizes the tilled soil well resulting in a good clod size distribution. Further, the number of tillage passes required to achieve an acceptable tilt quality, using implement, is also significantly reduced. Furthermore, damage of the rotating shafts and blades due to impact of stones and roots in soil are evaded.
[0029] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.