Technical field
[0001]The present invention, pulleys structures spring accommodation space is formed between the two rotating bodies, and a process for the preparation of the pulley structure.
BACKGROUND
[0002]Alternator or the like driven by the power of the engine of an automobile or the like, the auxiliary drive shaft having a large moment of inertia, in order to absorb the variation of the rotational speed of the crankshaft of the engine, for example, described in Patent Document 1 pulley structure is connected.
[0003]
　Pulley structure described in Patent Document 1 includes an outer rotating member belt is wound, disposed radially inwardly of the outer rotating member, the inner rotary body rotatable relative to the outer rotary member, the two rotation torsional disposed spring receiving space formed between the body comprises a coil spring or the like. The pulley structure via a torsion coil spring, and a clutch mechanism for transmitting or interrupting torque between the outer rotor and inner rotor.
[0004]
　Since the two rotating bodies is made of metal and interposed between the coil spring torsion rusted rotating body, the life function is lowered such as a clutch mechanism may become shorter. Therefore, many parts have been subjected to paint for rust. On the other hand, for example, the spring accommodation space, in a portion or the like that contacts the torsion coil spring, there is a risk of paint peeling, grease containing rust preventive in place of the paint used. More specifically, grease, during assembly of the pulley structure, is introduced into the spring housing space in a state of the paste-like mass. Grease has high viscosity at normal temperature, so difficult to flow, for example, by operation test of the alternator, raising the temperature of the spring accommodating space by rotating the pulley structure, lowering the viscosity by raising the temperature of the grease. By rotating the pulley structure in this state, the centrifugal force or the like, of two rotating bodies, antirust agent diffuses to a portion facing the spring housing space. In this way, compared to the case where one by one attached to the rust inhibitor to all areas facing the spring housing space, time and effort is greatly reduced, and, the amount of the rust inhibitor is suppressed to a minimum.
CITATION
Patent Document
[0005]
Patent Document 1: Japanese Patent 2016-156500 JP
Summary of the Invention
Problems that the Invention is to Solve
[0006]
　If the grease is put into the spring housing space in a state of simple mass, the grease may be a state in contact only unspecified portion of the spring housing space. In this case, for reasons of heat transfer area is small and the like, grease hardly heat is transferred, is hardly lowered viscosity. Therefore, when rotating the pulley structure, it may become difficult to diffuse grease to every corner of the area facing the two spring receiving spaces of the rotor.
[0007]
　An object of the present invention to the entire area facing the spring housing space easily diffused rust inhibitor.
Means for Solving the Problems
[0008]
　A first aspect of the pulley structure of the present invention is connected to the auxiliary machine of the engine, a pulley structure in which the power of the engine is transmitted through the belt, cylindrical outer which the belt is wound a rotating body, provided radially inward of the outer rotary member, an inner rotational member rotatable relative to the outer rotary member, the spring accommodation space formed between the inner rotor and the outer rotary member and a torsion coil spring which is arranged, at least, in a state where the pulley structure has not yet operate even once, the grease containing rust preventive, within said rotating body, an inner periphery of said torsion coil spring It is coated on the opposing surface opposed to a surface.
[0009]
　According to the pulley structure of the present invention, in a state where the pulley structure has not yet operate even once, the grease containing rust preventive, the opposing surface of the rotating body among which faces the inner peripheral surface of the torsion coil spring It has become coated state. Thus, grease compared with when it is put into the spring housing space in a state of simple mass, the contact area between the inner rotary body is increased, heat of the inner rotary body or the like during the operation test of the auxiliary machine become easily transmitted to grease, easy to raise the temperature of the grease, it is likely to fall viscosity. Also, among the faces forming the spring accommodation space, since the grease on the opposing surfaces disposed radially inward it is applied, together with the grease tends spreads on the inner rotating body, the centrifugal force generated by the rotation of the inner rotary body grease because they act on the grease tends to diffuse radially outward. Therefore, it can be the entire area facing the spring housing space easily diffused rust inhibitor.
[0010]
　A second aspect of the pulley structure of the present invention, in the first embodiment, the thickness of the grease in the facing surface is 2mm or less.
[0011]
　The heat of the inner rotating member in order to facilitate propagated throughout grease, it is preferable that the thickness of the grease at the opposing surface is 2mm or less.
[0012]
　A third aspect of the pulley structure of the present invention, in the first or second aspect, the area of ​​the grease adhering to the opposing surface is 4% or more of the area of ​​the facing surface.
[0013]
　In this embodiment, the area of ​​the grease adhering to the opposed surface is 4% or more of the area of ​​the opposing surfaces. That is, since a large heat transfer area of ​​the grease, the heat of the inner rotary body is easily transmitted to the grease.
[0014]
　Pulley structure of the fourth aspect of the present invention, in the first to third one embodiment, in the facing surface, the grease is applied along the rotation axis direction of the inner rotor.
[0015]
　In the radial direction, the operation test or the like of the accessory, but the grease tends to diffuse to the outside for the centrifugal force generated by the rotation of the inner rotary body acts on the grease, in the rotation axis direction, in particular acting large force in the grease because not to, grease is relatively difficult to spread. In this embodiment, the facing surface, because the grease is applied along the rotation axis direction of the inner rotary body, it is possible to easily spread the grease in the rotation axis direction.
[0016]
　Pulley structure of the fifth aspect of the present invention, the in the first to fourth one aspect of the grease of the faces forming the spring accommodation space, the facing surface of the inner rotating member only it has been applied to.
[0017]
　In this embodiment, grease, among the faces forming the spring housing space, and is applied only to the opposite surface of the inner rotor. Thus, while eliminating the troublesome than in the case of applying grease to other locations, it is possible to diffuse the grease by the rotation of the inner rotary body efficiently spring receiving space.
[0018]
　Pulley structure of the sixth aspect of the present invention, in any of the first to fifth, at the end of the rotation axis direction of the outer rotary member, is interposed between the inner rotating member It was provided with a slide bearing.
[0019]
　And an outer rotary body may corrode and rust in the gap between the slide bearing and the outer rotary member is generated, there is a risk that the bearing function is remarkably deteriorated, rust in the sliding bearing surface opposed to the outer rotary member agent it is necessary to diffuse. However, when grease only the outer rotary member, even if the pulley structure by rotational movement without force acts in the radial direction inward in the grease, grease is less likely to diffuse to the inner rotor. Say whether, when applied grease to both the inner rotor and the outer rotary member, time-consuming, the production efficiency is lowered. In this embodiment, the grease has been applied to the opposite surface of the inner rotating body, grease is likely to diffuse in both the inner rotor and the outer rotor. Therefore, even if no grease is applied to the outer rotary member, rust spreads to the end portion in the rotation axis direction of the outer rotary member, rust in the portion is suppressed. Thus, while suppressing the decrease in production efficiency can be maintained over a long period of time bearing function.
[0020]
　A seventh aspect of the pulley structure of the present invention, in the sixth aspect, wherein the sliding bearing is a polytetramethylene adipamide is formed of a resin composition based on resin, the resin composition and it is characterized in that it comprises a reinforcing material containing aramid fibers.
[0021]
　According to this aspect, at relatively high temperature region, it is possible to enhance the abrasion resistance and strength of the sliding bearing can be maintained for a longer period of time bearing function.
[0022]
　Pulley structure of the eighth aspect of the present invention, in the first to seventh any aspect of the accessory is an alternator whose drive shaft to produce electricity by rotating.
[0023]
　When the pulley structure is rotated is connected to the alternator, a large heat is generated along with the electric power generation by the alternator is driven, it is transmitted to the pulley structure. Therefore, it is possible to raise the temperature of the grease sufficiently.
[0024]
　The method of manufacturing a pulley structure of the ninth aspect of the present invention is connected to the auxiliary machine of the engine, a method for producing a pulley structure in which the power of the engine through the belt is transferred, the pulley structure above, a cylindrical outer rotary member, wherein the belt is wound, disposed radially inwardly of the outer rotary member, an inner rotational member rotatable relative to the outer rotary member, and the outer rotary member a coil torsion spring disposed in the spring receiving space formed between the inner rotating body, which comprises, in said rotating member, the surface facing the inner circumferential surface of the torsion coil spring, anti-corrosion applying the grease containing the agent.
[0025]
　In the production method of the present invention, by applying the opposite surface of the inner rotating body grease, grease than when put into the spring housing space in a state of simply lumps, the contact area between the grease and an inner rotary body growing. Therefore, the heat of the inner rotary body is easily transmitted to the grease when the operation test of the accessory. Also, among the faces forming the spring housing space, by applying grease on the opposing surface of the rotating body within which is disposed radially inward, together with the grease tends spreads on the inner rotating body, by rotation of the inner rotary body since the centrifugal force acts on the grease, also it tends to diffuse into the grease radially outward.
[0026]
　The method of manufacturing a pulley structure of the tenth aspect of the present invention, in the ninth aspect, after application of the grease, connecting the pulley structure to the auxiliary machine, the power of the drive source via the belt the so transmitted to the pulley structure to operate the pulley structure.
[0027]
　In this embodiment, connected to the actual auxiliary machine pulley structure after application of the grease, by transmitting the power of the driving source to the pulley structure through a belt to operate the pulley structure. Accordingly, the temperature rise of the spring housing space due to rotation of the pulley structure, by centrifugal force or the like acting on the grease by the rotation of the inner rotary body can be diffused grease on the surface to form a spring accommodation space.
[0028]
　The method of manufacturing the eleventh aspect of the pulley structure of the present invention, in the ninth or tenth aspect, after mounting the torsion coil spring within said rotating body, the torsion coil spring and the said rotary member the gap in the radial direction between the, by inserting a nozzle for discharging the grease from one side of the rotation axis direction of the inner rotary body, applying the grease on the facing surface.
[0029]
　When applying the grease on the inner rotating body prior to mounting the inner rotating body torsion coil spring, when mounting the torsion coil spring, attached to the coil spring portion of the grease twisting, heat of the inner rotary body is hard to be transmitted fear there is. In this embodiment, twist after mounting the coil springs in the inner rotary body, insert the nozzle into the gap between the torsion coil spring and the inner rotary member, applying grease to the opposing surface. This can suppress from adhering to the coil spring grease torsion.
[0030]
　Method for manufacturing a pulley structure of the twelfth aspect of the present invention, in the eleventh aspect, while the nozzle is the moving to one side from the other side of the rotation axis direction, ejecting the grease from the discharge port make.
[0031]
　In this embodiment, one nozzle from the other side in the rotation axis direction, i.e., the grease while simply pull the nozzle to the nozzle has been inserted side so applied to the opposite surface, it can be easily coated with grease.
[0032]
　Manufacturing method of the thirteenth aspect of the pulley structure of the present invention, in any of the embodiments of the ninth to twelfth, the grease of the faces forming the spring receiving space, of the inner rotary body only applied to the facing surface.
[0033]
　In this embodiment, the grease of the surface to form a spring accommodation space, since only applied to the opposite surface of the inner rotating body, while eliminating the troublesome than in the case of applying grease to other places, the inner rotation grease can be efficiently diffused by the rotation of the body.
BRIEF DESCRIPTION OF THE DRAWINGS
[0034]
Of (a) and FIG. 1 and FIG. 1 (b) is a front view and a side view of a belt transmission mechanism comprising a pulley structure.
FIG. 2 is a sectional view showing the finished product of the pulley structure.
FIG. 3 is a sectional view taken along line III-III in FIG. 2.
[4] FIG. 4 is a sectional view taken along line IV-IV of Figure 2.
[Figure 5] Figure 5 (a) ~ (g) are diagrams showing a manufacturing process of the pulley structure.
FIG. 6 is a side view of the inner rotor.
[7] FIG. 7 is a still cross-sectional view showing a pulley structure of a non-operational state even once.
[Figure 8] Figure 8 (a) and (b) are a front view and a side view of the testing machine.
[9] in FIG. 9 (a) ~ (d) are, in the specimen of Examples and Comparative Examples is an explanatory view showing a dwell position of the grease before the engine start testing.
[10] FIG 10 is a diagram showing a confirmation position of attachment whether rust agent after engine start the test.
DESCRIPTION OF THE INVENTION
[0035]
　Next, embodiments of the present invention will be described with reference to FIGS. 1-10.
[0036]
(Belt transmission schematic configuration of a mechanism)
　First, an example of a belt transmission mechanism the pulley structure 1 to be described later is incorporated, will be described with reference to FIG. (A) of FIG. 1 is a front view of a belt transmission mechanism 100, in FIG. 1 (b) is a side view. Belt transmission mechanism 100, for example, a crank pulley 101 connected to a crankshaft 111 of the engine 110 such as an automobile, an alternator 120 pulley structure 1 which is connected to the drive shaft 121 (the "accessory" of the present invention), comprises an AC pulley 102 coupled to the air conditioner compressor (not shown), and WP pulley 103 connected to a water pump (not shown), these wound between the pulleys over is belt B and (V-ribbed belt), a. Each pulley is rotatably supported, respectively. Further, between the belt span between the crank pulley 101 and the pulley structure 1, auto-tensioners 104 are provided. The output of the engine 110 via the belt B, and the crank pulley 101 in the clockwise direction, is transmitted respectively pulley structure 1, WP pulley 103, AC pulley 102, each accessory is driven.
[0037]
(Configuration of the pulley structure)
　Next, the pulley structure 1 is finished, that is, the configuration of the pulley structure 1 in the state of the factory will be described. Figure 2 is a cross-sectional view of the pulley structure 1 is finished. Figure 3 is a sectional view taken along line III-III in FIG. 2. Figure 4 is a sectional view taken along line IV-IV of Figure 2. For convenience of explanation, and the left-to-right direction in FIG. 2 the front-back direction ( "rotation axis direction" of the present invention), the paper left is the tip side of the pulley structure 1 forward (in the present invention "the other"), the paper right is the base end side of the pulley structure 1 and rear ( "one" of the present invention). Pulley structure 1 to the direction of rotation as the circumferential direction. Further, the radial direction of the outer rotary member 2 to be described later, and the radial direction.
[0038]
　Pulley structure 1 mainly includes the drive shaft 121 is connected to the alternator 120 to generate electricity for AC by rotating. As shown in FIG. 2, the pulley structure 1, the outer rotary body 2 which the belt B is wound, is provided inside the outer rotary member 2, the inner rotary body 3 is connected to the drive shaft 121 of the alternator When the torsion coil spring disposed between the inner rotor 3 and the outer rotary member 2 4 (hereinafter, simply referred to as "spring 4 ') comprises a like.
[0039]
　Outer rotary body 2 is a substantially cylindrical member having a through hole formed to penetrate in a longitudinal direction, for example S45C is a metallic member made of carbon steel, such as. As shown in FIG. 2, on the outer circumferential surface of the outer rotating body 2 is wound around the belt B. Outer rotating body 2, that given a torque via the belt B, and it is configured to rotate the rotation axis R as the center. The inner periphery of the rear end portion of the outer rotating body 2, pressure surface 21 outer circumferential surface 41 of the rear end portion of the spring 4 to be described later comes into contact is formed. In front of the pressing surface 21, abutment surface 22 is formed which abuts when the spring 4 is expanded deformation. Abutment surface 22 is formed radially outward from the contact face 21. Portion between the pressing surface 21 and contact surface 22 is chamfered. In front of the abutment surface 22, the bearing through 設面 23 slide bearing 7 described below is interposed are formed. Bearing through 設面 23 is formed radially outward from the abutting surface 22. Portion between the abutment surface 22 and the bearing via 設面 23 is chamfered. Further, the front end portion of the outer rotating body 2, the end cap 5 for covering the front of the opening of the outer rotating body 2 is mounted.
[0040]
　The outer peripheral surface of the outer rotary member 2, axial end surfaces, and chamfer are painted for rust (such as cationic electrodeposition coating) is applied. Meanwhile, in order to maximize the functions of the pulley structure 1, portions other than the chamfer of the inner peripheral surface of the through hole of the outer rotary member 2 (pressing surface 21, abutment surface 22 and the bearing via 設面 23 the etc.), paint is not applied.
[0041]
　Incidentally, when the coating, depending on the paint and painting method, the outer peripheral surface of the outer rotary member 2, the dimension of the corner 24 or the like is poor throwing power of the coating (the size of the chamfered) by optimizing the corners 24 it is necessary to consider to enhance the adhesion of the coating to. If insufficient adhesion of the coating film to the corner portion 24, when the rust occurs at the corner portion 24, there is a possibility that the coating film is gradually peeled off the corners 24 as a starting point. Location or by traveling surface rust is a coating film and the base (outer rotary body 2), rust liberated from the corrosion portion, the internal (in particular sliding bearing 7 of the spring accommodating space 8 to be described later is disposed ) to may enter. Therefore, the corner portions 24, the radius of curvature 0.8mm approximately more R plane, or, it is desirable that the C-plane.
[0042]
　The inner rotary body 3 is a substantially cylindrical member made of metal, for example S45C is a metallic member made of carbon steel, such as. As shown in FIG. 2, the inner rotary body 3 is provided radially inwardly of the outer rotating body 2, around the outer rotary member 2 identical rotation axis R, which can rotate relative to the outer rotary member 2 It has a configuration. The inner rotary body 3, not undergone painting described above.
[0043]
　The inner rotor 3 includes a cylindrical body 31, an outer cylinder portion 32 disposed radially outwardly of the front end portion of the cylindrical body 31, the connecting portion 33 or the like connecting the cylindrical body 31 and the outer tube portion 32. Cylindrical body 31 is connected to a drive shaft 121 of the alternator. The rear end portion of the cylindrical body 31, press-fitting surface 38 of press-fitting the rolling bearing 6 to be described later is formed. In front of the press-fitting surface 38, facing surface 34 that faces the inner circumferential surface 42 of the spring 4 to be described later is formed. Facing surface 34 is formed radially outward from the press-fitting surface 38. In front of the opposing surfaces 34, contact surface 35 for contacting an inner peripheral surface of the spring 4 is formed. The contact surface 35 is formed radially outward from the facing surface 34.
[0044]
　The outer cylindrical portion 32 is a cylindrical portion located radially outwardly of the front end portion of the cylindrical body 31. The outer cylindrical portion 32, so as not to interfere with the outer rotary member 2, and extends rearward. The inner diameter of the outer cylindrical portion 32 is larger than the diameter of the outer rotating body 2 of the press-contact surface 21. Connecting portion 33 is formed radially outward of the front end portion of the cylindrical body 31, an annular portion connecting the cylindrical body 31 and the outer tube portion 32.
[0045]
　In the front end of the inner rotary body 3, between the tube main body 31 and the outer cylindrical portion 32, the end face 36 is formed (see FIG. 3). The end face 36 in the circumferential direction, opposite to the front end face 49 of the spring 4 which will be described later. The inner circumferential surface of the outer cylindrical portion 32, projections 37 projecting radially inwardly of the outer tubular portion 32 is formed (see FIG. 3). Protrusion 37, with respect the end face 36, is formed at around 90 ° away in the circumferential direction.
[0046]
　And the inner peripheral surface of the rear end portion of the outer rotating body 2, between the outer peripheral surface of the rear end portion of the cylindrical body 31 of the inner rotary body 3, the rolling bearing 6 is interposed. And the inner surface of the front end portion of the outer rotating body 2, between the outer peripheral surface of the outer cylindrical portion 32 of the inner rotary body 3, the slide bearing 7 is interposed. The rolling bearings 6 and the slide bearing 7, the outer rotary member 2 and the inner rotor 3 is made relatively rotatable.
[0047]
　Rolling bearing 6 is sealed ball bearing, for example the contact seal type. Sliding bearings 7, for example, a resin called polytetramethylene adipamide (nylon 46) is formed of a resin composition based resin (main component), a C-shaped member having elasticity. Further, this resin composition, may contain reinforcement fibrous with aramid fibers. Thus, in a relatively high temperature range (e.g. 90 ℃ ~ 130 ℃), increased abrasion resistance and strength of the slide bearing 7, the bearing function is maintained over a longer period of time. Slide bearing 7 is mounted on the inner rotating body 3 of the outer tube portion 32 while being slightly enlarged, in close contact with the outer cylindrical portion 32 by the self elastic restoring force. Between the slide bearing 7 and the outer rotary member 2 of the bearing through 設面 23, is empty 0.1mm about gaps in the radial direction. This gap is enabled passing air.
[0048]
　Between the outer rotary member 2 and the inner rotor 3, the spring accommodation space 8 for accommodating the spring 4 is formed. In particular, the spring accommodation space 8, and the inner peripheral surface of the outer cylinder portion 32 of the inner peripheral surface and the inner rotary body 3 of the outer rotary member 2, and the outer peripheral surface of the cylindrical body 31, and the rear surface of the connecting portion 33, the rolling a space defined by the front surface of the bearing 6.
[0049]
　From the gap between the outer rotating member 2 and the slide bearing 7, since the air is enabled inflow, in this state, out of the outer rotary member 2 and the inner rotor 3, rust is generated in the portion where the coating is not applied fear there is. This rust, of the outer rotary member 2 and the inner rotor 3, the portion frequently contacting with the spring 4 (e.g. pressing surface 21, abutment surface 22, etc.) or a slide bearing 7 and the like is worn, the pulley structure 1 life there is a fear that is shortened. Therefore, the spring housing space 8 of the pulley structure 1, the grease containing the rust inhibitor is sealed.
[0050]
　Grease is pasty at ambient temperature, containing a base oil is a rust inhibitor, a thickening agent to increase the consistency of the base oil (hardness). The base oil is, for example, ester oil (synthetic oil). The thickeners, for example, excellent urea compound in heat resistance is used. To achieve the full lubrication state while maintaining the state of the grease consistency of grease (the test method JISK2220: 2103 compliant) JIS Classification 2-3 No. corresponds at 25 ° C. is. The content of thickener is from 5 to 40% by weight, based on the grease total amount is preferred. The kinematic viscosity of the grease, 100 mm at 40 ° C. 2 / s (test method ASTM D7042-14: compliant 2014) is preferably about. Specific gravity of grease, about 0.97 is preferred. Although not shown in FIG. 2, the grease is spread throughout the surface to form a spring accommodating space 8. Incidentally, the grease is enclosed in the interior of the rolling bearing 6.
[0051]
　Here, grease, of the outer rotary member 2 and the inner rotor 3, so easily diffuses in the entire surface forming a spring accommodating space 8, in a state where the pulley structure 1 is not yet operating even once, the inner rotation It is coated on the opposite surface 34 of the body 3. It will be described in detail later.
[0052]
　The spring 4 is a torsion coil spring formed by winding a spring wire helically. The wire spring 4, for example, spring oil-tempered wire (JISG3560: compliant 1994) is used. The spring 4 is a left-handed (counterclockwise toward the rear end from the front end). Spring 4, in a state where the outer rotating member 2 and the inner rotor 3 does not rotate, the diameter along the entire length is substantially constant. Spring 4, by being sandwiched between the surface and the front surface of the rolling bearing 6 after the inner rotary body 3 of the connection portion 33 are accommodated in the spring accommodating space 8 while being slightly compressed in the axial direction. The cross-sectional shape of the spring wire of the spring 4 is, for example, a rectangular shape. The outer peripheral surface 41 and the inner circumferential surface of the spring 4 42, are substantially the rotation axis R of the outer rotating body 2 parallel. The spring 4 is, in a state where the outer rotating member 2 and the inner rotor 3 does not rotate, at the rear end, a rear end region 43 outer circumferential surface 41 contacts the pressing surface 21 of the outer rotary member 2, in the front end portion has a front end region 44 of the inner circumferential surface 42 contacts the contact surface 35 of the inner rotary body 3, a.
[0053]
　The rear end region 43 is a region of more than one turn from the rear end of the spring 4 (360 ° or more around the rotation axis). In a state where the outer rotating member 2 and the inner rotor 3 does not rotate, the rear end region 43 is accommodated in the spring accommodating space 8 in a slightly reduced diameter state. The outer peripheral surface 41 of the rear end region 43, by the self elastic restoring force of the enlarged diameter direction of the spring 4, is pressed against the pressing surface 21 (see FIGS. 2 and 4).
[0054]
　Front end region 44 is a region of more than one round from the front end of the spring 4 (360 ° or more around the rotation axis). Front end region 44, in a state where the outer rotating member 2 and the inner rotor 3 does not rotate, are accommodated in the spring accommodating space 8 in a state of being slightly enlarged. The inner peripheral surface 42 of the front end region 44 is pressed against the contact surface 35 (see FIGS. 2 and 3). Further, front end region 44 is comprised of three parts. That is, as shown in FIG. 3, the front end region 44 includes a first portion 46 the inner rotary body 3 of the projection 37 front end of the spring 4 than in the (same direction as the arrow in FIG. 3) in the circumferential direction, the radial direction It has a second portion 47 facing the projection 37, and a third portion 48 of the rear end side of the second portion 47 (arrow opposite to the direction in FIG. 3) in the. 3, a portion sandwiched by two-dot chain line of the spring 4, a second portion 47. Further, the front end portion of the first portion 46, the front end surface 49 facing the end face 36 and the circumferential direction of the inner rotary body 3 is formed.
[0055]
(Operation of the pulley structure)
　Next, the operation of the pulley structure 1. First, when the rotational speed of the outer rotating body 2 is greater than the rotational speed of the inner rotor 3 (i.e., when the outer rotary member 2 is accelerated) will be described. The arrow direction in FIG. 3 and FIG. 4 is the positive direction.
[0056]
　First, the outer rotary member 2 begins to rotate relative to the forward direction relative to the inner rotor 3. Here, the pressing surface 21 of the outer rotating body 2, since the outer peripheral surface 41 of the rear end region 43 of the spring 4 is pressed against (see Fig. 4), with the relative rotation of the outer rotating body 2, the spring the rear end region 43 of 4 moves in the positive direction together with the pressing surface 21, relative rotation in the forward direction relative to the inner rotor 3. Thus, deformation spring 4 is torsion diameter direction (hereinafter, referred to simply enlarged deformation) to. Incidentally, the pressure contact force of the rear end region 43 of the spring 4 for the contact face 21, increases as the torsion angle of the enlarged diameter direction of the spring 4 is increased.
[0057]
　If twist angle of the enlarged diameter direction of the spring 4 is smaller than the predetermined angle (e.g., 3 °), of the spring 4, the greatest torsional stress is controlled so as to generate the second portion 47 of the front end region 44, the second portion 47 is likely the most expanded deformation. Therefore, when the twist angle of the enlarged diameter direction of the spring 4 is increased, the inner circumferential surface 42 of the second portion 47 is initially away from the contact surface 35 by the diameter expansion deformation. Substantially simultaneously with the second portion 47 moves away from the contact surface 35, or, when the twist angle of the diameter expansion direction of the spring 4 is further increased, the outer circumferential surface of the second portion 47 abuts against the projection 37, a second portion 47 diameter expansion deformation of is restricted.
[0058]
　At the same time the second portion 47 abuts against the projection 37, or, when the twist angle of the diameter expansion direction of the spring 4 is further increased, the pressure contact force against the contact surface 35 of the third portion 48 becomes substantially zero. Further twist angle increases, the third portion 48, moves away from the contact surface 35 by the diameter expansion deformation. In this case, expanded deformation of the front end region 44 of the spring 4 are regulated by the projection 37, the front-side region 44 are maintained in easy shape to slide relative to the arc-shaped, i.e. projections 37. Therefore, when the torsion torque is increased to act on the spring 4 the torsion angle further increases, the front-side region 44, the contact pressure of the first portion 46 against the pressing force and the contact surface 35 of the second portion 47 against the projection 37 anti to slides in the circumferential direction with respect to the projection 37 and the contact surface 35. By the front end face 49 of the spring 4 presses the end surface 36 abuts against the end surface 36, ensures the torque is transmitted between the inner rotor 3 and the outer rotary member 2.
[0059]
　When twist angle of the enlarged diameter direction of the spring 4 is further increased, the portion between the front end region 44 and the rear end region 43 of the spring 4 is gradually expanded. Twist angle, for example, be about 45 °, a portion of the outer peripheral surface 41 of the enlarged diameter with spring 4 comes into contact with the abutment surface 22 of the outer rotary member 2, the enlarged diameter of the spring 4 is completely restricted, outer rotary member 2 and the inner rotor 3 rotates integrally.
[0060]
　Then, when the rotational speed of the outer rotary member 2 is smaller than the rotational speed of the inner rotor 3 (i.e., when the outer rotary member 2 is decelerated) will be described. In this case, the outer rotary body 2 is relatively rotated in the reverse direction relative to the inner rotary body 3 (arrow direction opposite to the direction of FIG. 3 and FIG. 4). With the relative rotation of the outer rotating body 2, the rear end region 43 of the spring 4 is moved together with the pressing surface 21, it rotates relative to the inner rotor 3. Thus, the spring 4 is deformed torsion direction of reducing the diameter (hereinafter, simply referred to as shrink deformation).
[0061]
　If twist angle of diameter reduction direction of the spring 4 is smaller than the predetermined angle (e.g. 10 °), contact pressure against the contact face 21 of the rear end region 43, although twist angle slightly lower than that of the zero, the rear end region 43 is in pressure contact with the contact face 21. Also, pressure contact force against the contact surface 35 of the front end region 44, the torsion angle is slightly increased compared to the case of zero. When twist angle of diameter reduction direction of the spring 4 is further increased, the contact pressure against the contact face 21 of the rear end region 43 becomes substantially zero, the circumferential direction of the outer rotary member 2 relative to the rear end region 43 is pressed against surface 21 to slide. Accordingly, the torque between the inner rotor 3 and the outer rotary member 2 is not transmitted. Thus, the spring 4 is between the inner rotor 3 and the outer rotary member 2 to transmit or cut off the torque.
[0062]
(Manufacturing method of the pulley structure)
　Next, a method for manufacturing a pulley structure 1 will be described with reference to FIG.
[0063]
　First, the inner rotor 3 (see (a) of FIG. 5) is mounted by press-fitting the spring 4 from the rear (see FIG. 5 (b)). Next, the bearing 7 sliding to the front end of the inner rotary body 3 is mounted (see FIG. 5 (c)), further, attaching the outer rotary body 2 from the rear inner rotary body 3 (shown in FIG. 5 (d) reference).
[0064]
　In this state, applying a grease to the opposing surface 34 of the inner rotor 3. The application of grease, for example, a dispenser 201 is used. As shown in (e) of FIG. 5, the dispenser 201 includes a main body 202, and a nozzle 203 extending from the body portion 202, and weighed grease, a metered grease that ejected from the nozzle 203, and it is configured to be applied to the object grease. Nozzle 203 has an insertable diameter between the counter surface 34 and the inner peripheral surface 42 of the spring 4 of the rotor 3, at its distal end, a discharge port 204 which grease is discharged is formed ing. Discharge port 204 is inclined obliquely relative to the direction in which the nozzle 203 extends.
[0065]
　First, by using the dispenser 201 and metering grease. The amount of grease required is the outer rotary member 2 and the inner rotor 3, among the surfaces which form the spring receiving space 8, the minimum required to form an oil film on the entire surface of coating is not applied is the amount. For example, in this embodiment, the amount of grease, about 0.2 g (volume about 0.2 cm 3 is).
[0066]
　Next, as shown in FIG. 5 (e) is inserted between the inner peripheral surface 42 of the opposing surface 34 and the spring 4 the nozzle 203 from the rear of the inner rotary body 3 of the rotary member of the dispenser 201. Here, the rear of the facing surface 34 is press-fitting surface 38, the diameter of the press-fitting surface 38 is smaller than the diameter of the opposing surfaces 34, it is possible to easily insert the nozzle 203. Next, in order to prevent damaging the inner rotary body 3, to stop the tip of the nozzle 203 at the rear (e.g. 5mm before) the inclined surface between the contact surface 35 and opposing surface 34. Then, starting from the stop position, is opposed to the inner rotor 3 facing surfaces 34 of the discharge port 204 in the radial direction. Then, by moving to the rear side of the nozzle 203 from the front side, while retracted to the front of the press-fitting surface 38, push the grease 200 substantially uniformly, it is applied to the opposing surface 34. Thus, the grease 200 is in a state where elongated in the front-rear direction (see FIG. 6). Incidentally, like press-fitting surface 38, the portion other than the facing surface 34 does not grease 200. Then, by rotating the inner rotating body slightly, by inserting the nozzle 203 again, to eject the grease 200 while retracting the nozzle 203. Repeat several times above work, applying grease 200 on the opposite surface 34.
[0067]
　Then, during a rear end portion of the rear end portion of the outer rotary member 2 and the inner rotor 3, press-fitting the rolling bearing 6 (see (f) of FIG. 5). At this point, except for the mounting or the like of the end cap 5, the assembly of the pulley structure once finished. The pulley structure 10 at the time the assembly is completed once (see (f) and figures 5 7) of the present invention, still corresponds to a pulley structure in a non-operational state even once. A pulley structure 1 is finished at the time of shipment, yet the difference between the pulley structure 10 that does not work once, grease and whether the end cap 5 is mounted on the surface to form a spring accommodating space 8 There is one state which is applied to the opposing surface 34 of the state or, or grease inner rotary body 3 which has diffused.
[0068]
　Immediately after assembly, the state where the pulley structure 10 is not yet operating even once, i.e., in a state not yet connected once the drive shaft 121 of the alternator 120, as shown in FIG. 7, the grease 200, the inner is a state of being applied to the opposing surface 34 of the rotor 3. In other words, the grease 200, as compared with the case where merely thrown into the spring housing space 8, which strongly contact with the opposing surface 34. Grease 200, since it is applied while moving the nozzle 203 as described above in the longitudinal direction, extending long in the longitudinal direction, are arranged discontinuously in the circumferential direction. The amount of the grease 200, the outer rotary member 2 and the inner rotor 3, of the surfaces forming the spring accommodating space 8, a minimum amount necessary for forming an oil film on the entire surface of coating is not applied there are, for example, about 0.2 g (volume about 0.2 cm 3 ) is. The thickness of the grease 200 in the facing surface 34 is preferably equal to or less than 2 mm. The thickness of the grease 200 in the facing surface 34, more preferably about 0.8 mm ~ 1.3 mm. The area of the grease 200 attached to the opposite surface 34, more than 4% of the area of the opposing surfaces 34 are preferred. Area of the grease 200 adheres to the facing surface 34 is about 6% to 10% of the area of the opposing surface 34 is more preferable. Grease 200, of the faces forming the spring accommodation space 8, which is only applied to the opposing surface 34, the other surface not coated.
[0069]
　Next, the manufacturer or the like of the alternator 120, for connecting the pulley structure 10 to the drive shaft 121 of the alternator 120. Then, conduct completion inspection of the alternator 120, performed in conjunction with this, the outer rotary member 2 and the inner rotor 3, the diffusion of the grease 200 to the surface to form a spring accommodating space 8. More specifically, as shown in FIG. 8, using a tester 100a having the same structure as the belt transmission mechanism 100 (see FIG. 1), a pulley structure 10, the engine 110a (driving source of the present invention) etc. of the crank shaft 111a connected to a pulley 101a, wound belt B on the other pulley, starts and stops the engine start at equivalent operating conditions and engine starting test described below, to operate the pulley structure 10. Engine start-up number of times is, for example, five times. Thus, heat or generated along with the rotation of the pulley structure 10, the temperature of the spring housing space 8 increases by heat or the like generated due to the power generation of the alternator 120. For example, the surface temperature of the opposing surface 34, in this completion inspection, up to about 40 ° C.. Then, the temperature rise of the spring accommodating space 8 and, by shearing heat generated by the friction between the grease 200 or between the grease 200 and the facing surface 34, increases the temperature of the grease 200 applied to the opposing surface 34, the viscosity of the grease 200 It tends to flow down. Further, since the centrifugal force acts on the grease 200 by the rotation of the inner rotary body 3, the grease 200 is scattered radially outward diffusing into pressure contact surface 21 of the outer rotary member 2 and the like. A part of the grease 200 per well in the spring 4, and the like running down the spring wire, also diffused in the longitudinal direction. In this way, the grease 200, the outer rotary member 2 and the inner rotor 3, diffuses throughout the surface to form a spring accommodating space 8. Grease is also diffused in the gap between the slide bearing 7 and the outer rotary member 2, not leaving little leak forward from the gap.
[0070]
　Finally, mounting the end caps 5 to the front end of the outer rotary member 2. Thus, the pulley structure 1 is completed (see (g) in FIG. 5).
Example
[0071]
　Next, detailed embodiments of the present invention. The inventors of the present invention, the first embodiment shown in Table 1, using a specimen of the pulley structure of Comparative Example 1-3, a test for verifying the effects of the present invention.
[0072]

[Table 1]

[0073]
Example 1
　specimen of the pulley structure of Example 1 is a pulley structure 10d shown in (d) of FIG. 9, including the retention position and shape of the grease is the same as the pulley structure 10 . The facing surface 34 of the inner rotary body 3, grease 200d is applied to the flat. The amount of grease 200d is about 0.2 g (volume about 0.2 cm 3 is). Dwell position in front of the grease 200d assembling the specimen alternator is a portion ranging rear end from substantially the center in the longitudinal direction of the inner rotor 3 facing surfaces 34. The above is also true for Example 2 to be described later. The thickness of the grease 200d in the facing surface 34 is approximately 1 mm, and the area of grease 200d attached to the facing surface 34 is approximately 8% of the area of the opposing surface 34.
[0074]
　Example 2
　Specimens of the pulley structure of Example 2 is a pulley structure 10e shown in (d) of FIG. 9, in which the grease 200e was coated on the opposite surface 34 of the inner rotor 3. The thickness of the grease 200e in the facing surface 34 is 1.8 mm ~ 2.0 mm, and the area of grease 200e attached to the facing surface 34 is about 4% of the area of the opposing surface 34.
[0075]
Comparative Example 1
　Specimens of the pulley structure of Comparative Example 1 is a pulley structure 10a shown in FIG. 9 (a), except dwell position and shape of the grease has the same configuration as the pulley structure 10. The spring accommodation space 8, the grease 200a is in the state of being about 0.2g turned on with mass. The same applies to Comparative Examples 2 and 3 to be described later. Also, the residence location of the grease 200a are longitudinal direction substantial center of the inner rotor 3 facing surfaces 34.
[0076]
Comparative Example 2
　Specimens of the pulley structure of Comparative Example 2 is a pulley structure 10b shown in FIG. 9 (b), grease 200b is one that is put into the spring housing space 8 in a state of lumps . Dwell position of the grease 200b are the rear end of the inner rotor 3 facing surfaces 34.
[0077]
Comparative Example 3
　Specimens of the pulley structure of Comparative Example 3 is a pulley structure 10c shown in (c) of FIG. 9, the grease 200c is one that is put into the spring housing space 8 in a state of lumps . Dwell position of the grease 200c is the front-rear direction substantially central outer peripheral surface 41 of the spring 4.
[0078]
(Engine start test)
　will be described next engine start test to verify the effects of the present invention. The inventors of the present invention performs engine starting test, the target portion of the outer rotary member 2 and the inner rotor 3 to form a spring accommodating space 8 (painting is not performed, rust preventive site necessary) proof against It confirmed the adhesion state of rust agent.
[0079]
　First, an outline of the engine start-up test. Specimens of the pulley structure evaluated is a five pulley structure 10a ~ 10e described above. Perform engine starting test of each specimen at a predetermined engine start (the number of times from the start to the stop), then decomposing each specimen, the presence or absence of adhesion of the rust preventive check visually by target site, to evaluate the presence or absence of the attachment of the rust inhibitor by criteria which will be described later. Specific target sites, sites shown in Table 1 and FIG. 10, namely the bearing through 設面 23 of the outer rotary member 2, contact face 21, in contact surface 22, facing surface 34 and other parts of the inner rotor 3 is there. Note that the other portions, the outer rotary member 2 and the inner rotor 3, among the surfaces which form the spring receiving space 8, the bearing through 設面 23, contact face 21, other than the abutting surface 22 and opposing surface 34 It is a part, and, refers to a site that painting has not been performed.
[0080]
　Next, details of the engine start testing. For each specimen, using the engine bench test machine having the same configuration as the belt transmission mechanism 100 (see FIG. 1), it was subjected to engine start test. Equivalent engine starting 5 times, to match the surface temperature of the rotating body 3 of the facing surface 34 (approximately 40 ° C.) among reached in the completion inspection of the alternator, when the number of engine start is 5 times, the surface of the opposing surfaces 34 temperature was adjusted to ambient temperature to get about 40 ° C.. Number of starts of the engine is three (5 times, 20 times, 50 times) as was prepared each specimen in correspondence with each engine start times. Repeatedly alternately start and stop the engine, when the starting number of the engine has reached a predetermined number of times, the test was terminated for that specimen. It should be noted that the tension of the belt was set to 1500N. Driving time per engine (the time from start to stop) was 10 seconds. Ambient temperature was adjusted assuming vehicle equivalent temperature. Also, during every engine starting, rotational speed of the crankshaft has been varied between 0 ~ 1800 rpm. Maximum number of revolutions of the drive shaft and the inner rotor 3 of the alternator of this time, reaches about 4000 rpm. The test described above, temperature rises of the spring accommodating space 8, the viscosity decreases up temperature of grease. Further, since the centrifugal force acts on the grease by rotation of the pulley structure 10a ~ 10e, of the outer rotary member 2 and the inner rotor 3, the grease diffuses into the surface to form a spring accommodating space 8.
[0081]
　After the test, to decompose the pulley structure, the adhesion state of the rust preventive Visual inspection for each target site, if the rust inhibitor is attached to the entire target site ○ (pass), the target site at least a If the rust inhibitor is not attached to the part was × (fail). Incidentally, the bearing through 設面 23, contact face 21, the evaluation for a site other than the abutting surface 22 and the opposing surface 34, the evaluation of these four sites was performed only if all ○. Furthermore, for each example or comparative example, when the evaluation of all the sites were ○, it was tested censored.
[0082]
　The test results were as shown in Table 1 above. In Examples 1 and 2 was applied to the opposing surface 34 of the inner rotor 3 the grease 200, the adhesion of rust was observed in all the target site at the end the engine start 5 times. On the other hand, the Comparative Examples 1 to 3 was charged grease in the form of lumps, locations rust agent does not adhere was observed in a part of the target site. Particularly marked tendency, in Comparative Examples 1 and 2 which supplied the mass of grease on the facing surface 34, rust is hard over to go into the bearing through 設面 23 of the front end of the furthest outer rotary member 2 from the opposite surface 34 tended. Further, in Comparative Example 3 was charged mass of grease to the outer peripheral surface 41 of the spring 4, repeated 50 times to start and stop the engine, rust preventive go radially inward of the opposing surfaces 34 than the spring 4 It did not span. These results, when the configuration of Embodiment 1 or 2 pulley structure, it has been found that it is possible to attach the rust inhibitor to all target site with a small engine starting times.
[0083]
(Other tests)
　complex environment cycle test to repeat drying and salt spray (according to JISK5600-7-1) to (1 cycle for 24 hours) was performed on the pulley structures of Examples 1 and 2 and Comparative Example 1. First, the pulley structure 10 (pulley structure 10d, 10e) of Example 1 and 2 in the new pulley structure having the same configuration as, and performed an engine start testing at engine start 5 times, then mixed environment It was performed cycle test. As a result, the pulley structure, even if the test of 90 cycles (2160 hours), the surface forming the outer rotary member 2 and the inner rotor 3 of the spring accommodating space 8, rust was not generated. On the other hand, it was subjected to the same engine start testing and combined environmental cycle test also pulley structure having a structure similar to pulley structure 10a of Comparative Example 1. As a result, the portion where corrosion inhibitor was not adhered (bearing through設面23 and contact face 21) in the above Table 1, with 60 cycles (1440 hours) was observed to occur signs of rust. Incidentally, if not sealed grease spring accommodating space 8, at 60 cycles, the occurrence signs of rust was observed in the entire uncoated region of the outer rotary member 2 and the inner rotor 3 facing the spring housing space 8.
[0084]
　As described above, a state before the pulley structure 10 is connected to a drive shaft 121 of the alternator, i.e., in a state it is not already running even once, the grease 200 is applied to the opposing surface 34 of the inner rotor 3 it is a state. Thus, as compared with the case where the grease 200 is put into the spring housing space 8 in a state of simple mass, the contact area between the inner rotary body 3 is increased, the heat of the inner rotor 3 when the engine is started test become easily transmitted to grease 200, easy to raise the temperature of the grease 200, is likely to fall viscosity. Also, among the faces forming the spring accommodating space 8, since the grease on the opposing surfaces 34 of the rotor 3 is applied among which is disposed radially inward, together with the grease tends spreads to the inner rotor 3, the inner rotation since centrifugal force generated by the rotation of the body 3 acts on the grease 200, grease 200 is easy to diffuse radially outward. Therefore, it is possible to easily diffuse the rust inhibitor in the entire area facing the spring housing space 8.
[0085]
　The thickness of the grease 200 in the facing surface 34 is 2mm or less. Therefore, it is possible to the inner rotary body 3 of the heat easily transmitted to the total of the grease 200, tends to lower the viscosity of the grease 200.
[0086]
　The area of ​​the grease 200 adheres to the facing surface 34 is 4% or more of the area of ​​the opposing surface 34. That is, since a large heat transfer area of ​​the grease 200, the heat of the inner rotor 3 is easily transmitted to the grease 200.
[0087]
　Further, the grease 200 is, for extending along the longitudinal direction, when the pulley structure 10 is rotated, it is possible to grease 200 easily diffuses in the longitudinal direction.
[0088]
　Further, the grease 200 is applied only to the facing surface 34 of the inner rotor 3. Thus, while eliminating the troublesome than in the case of applying the grease 200 also elsewhere, can be diffused grease 200 by the rotation of the inner rotary body 3 efficiently spring accommodating space 8.
[0089]
　Further, the grease 200 is applied to the opposing surface 34 of the inner rotary body 3, the grease 200 is easily diffused throughout the surface to form a spring accommodating space 8. Therefore, even if no grease is applied to the outer rotating body 2 of the pulley structure 10, the grease 200 spreads to the front end portion of the outer rotary member 2 slide bearing 7 is disposed, rust in this portion suppresses are bearing function is maintained for a long time. Thus, while suppressing the decrease in production efficiency, the pulley structure can longer life.
[0090]
　Further, the slide bearing 7, the polytetramethylene adipamide is formed of a resin composition based resin, the resin composition comprises a reinforcement material containing aramid fibers. Thus, it is possible to enhance the abrasion resistance and strength of the bearing 7 sliding even at relatively high temperature range can be maintained for a longer period of time bearing function.
[0091]
　Also, the pulley structure 10 is rotated and is connected to the alternator 120, a large heat is generated along with the electric power generation by the alternator 120 is driven, it is transmitted to the pulley structure 10. Therefore, it is possible to raise the temperature of the grease 200 sufficiently.
[0092]
　Further, after the application of the grease 200, connecting the pulley structure 10 to the alternator 120 via a belt B by transmitting the power of the engine 110a to pulley structure 10, to operate the pulley structure 10. Diffusion Thereby, the temperature rise of the spring receiving space 8 with the rotation of the pulley structure 10, by centrifugal force or the like acting on the grease 200 by the rotation of the inner rotary body 3, the grease on the surface to form a spring accommodating space 8 it can be.
[0093]
　Further, after mounting the spring 4 to the inner rotor 3, by inserting the nozzle 203 into the gap between the inner rotor 3 and the torsion coil spring 4, Apply grease 200 on the opposite surface. Thus, it is possible to suppress the adhering grease 200 spring 4.
[0094]
　The rear nozzle 203 from the front side, i.e., since the grease 200 on the opposing surfaces 34 while simply pull the nozzle 203 on the side where the nozzle 203 is inserted, it is possible to easily apply the grease 200.
[0095]
　Next, a description will be given of a modified example in which changes to the embodiment to the. However, the elements which have the same configuration as the previous embodiments above, the description thereof is omitted as appropriate given the same reference numerals.
[0096]
(1) In the embodiment, it is assumed to discharge grease 200 while pulling the nozzle 203 to the rear, not limited thereto. For example, by discharging the grease 200 while the inner rotary body 3 is relatively rotated with nozzle 203, it may be a grease 200 is applied to the circumferential direction. That is, in the embodiment, the grease 200 extends linearly along the longitudinal direction, has been assumed to be arranged discontinuously in the circumferential direction, for example, grease 200 is continuously also in the circumferential direction it may be applied. Further, the grease 200 may be applied to the entire facing surface 34.
[0097]
(2) In the previous embodiments above, it is assumed to apply grease 200 by a dispenser 201, not limited thereto. For example, before attaching the spring 4 to the inner rotor 3 may be equal to apply grease on the opposite surface 34 with a brush.
[0098]
(3) Thickness of the grease 200 in the facing surface 34 is not necessarily, be not 2mm or less. The area of ​​the grease 200 adheres to the facing surface 34 may not necessarily more than 4% of the area of ​​the opposing surface 34. Further, the grease 200 may not necessarily have been applied only to the facing surface 34, for example, such as a bearing through 設面 23, the grease 200 may be also applied to the places not easily diffused.
[0099]
(4) slide bearing 7 may not necessarily be formed of a resin containing a polytetramethylene adipamide. For example, it may be formed of a synthetic resin such as polyacetal resin.
[0100]
(5) rotation of the pulley structure 10 after grease 200 on the opposite surface 34 is not necessarily performed in a state of being connected to the auxiliary machine such as an alternator 120. For example, in a state of being connected to a dedicated inspection apparatus and the like by operating the pulley structure 10, may be diffused grease 200.
[0101]
(6) tester 100a may not necessarily have the engine 110a as a driving source, for example a motor or the like may be used as a drive source.
[0102]
　The present invention in detail, also has been described with reference to specific embodiments, without departing from the spirit and scope of the present invention, it is possible that various changes and modifications will be apparent to those skilled in the art.
　This application is 2017 March 30 filed Japanese Patent Application 2017-066808, and is based on 2018 February 28 date filed Japanese Patent Application 2018-034232, the contents of which are incorporated herein by reference.
DESCRIPTION OF SYMBOLS
[0103]
　　1 pulley structure
　　2 outside the rotary body
　　3 within the rotary body
　　4 the torsion coil spring
　　7 slide bearing
　　8 spring housing space
　　10 pulley structure
　　34 facing surface
　　within 42 peripheral surface
　　110 Engine
　　110a engine (drive
　　source) 120 alternator
　　(auxiliary) 121 drive axis
　　200 grease
　　203 nozzles
　　B belt

The scope of the claims

[Requested item 1]Is connected to the auxiliary machine of the engine, a pulley structure in which the power of the engine is transmitted through the belt,
　and the outer rotating body cylindrical in which the belt is wound,
　radially inward of the outer rotary member provided, an inner rotary member rotatable relative to the outer rotary member,
　and a torsion coil spring disposed in the spring receiving space formed between the inner rotor and the outer rotary member,
　at least in a state where the pulley structure has not yet operate even once,
　the grease containing rust preventive, within said rotating body, is coated on the opposite surface facing the inner circumferential surface of the torsion coil spring, pulley Structure.
[Requested item 2]
　When the thickness of the grease at the facing surface is 2mm or less, the pulley structure according to claim 1.
[Requested item 3]
　The area of ​​the grease adhering to the opposed surface is 4% or more of the area of ​​the facing surface, the pulley structure according to claim 1 or 2.
[Requested item 4]
　In the facing surface, the grease is applied in the direction of the rotation axis of said rotating body, a pulley structure according to any one of claims 1 to 3.
[Requested item 5]
　The grease out of said surface to form a spring accommodation space, and only be applied to the facing surface of the inner rotating body, a pulley structure according to any one of claims 1-4.
[Requested item 6]
　At the end of the rotation axis direction of the outer rotary member, comprises a sliding bearing which is interposed between the inner rotary member, a pulley structure according to any one of claims 1 to 5.
[Requested item 7]
　The sliding bearing is a polytetramethylene adipamide is formed of a resin composition based on resin,
　the resin composition comprises a reinforcement material containing aramid fibers, a pulley structure according to claim 6 .
[Requested item 8]
　The auxiliary machine is an alternator that generates electricity by the driving shaft is rotated, the pulley structure according to any one of claims 1 to 7.
[Requested item 9]
　Is connected to the auxiliary machine of the engine, a method for producing a pulley structure in which the power of the engine through the belt is transferred,
　the pulley structure includes a cylindrical outer rotary member, wherein the belt is wound, provided radially inward of the outer rotary member, an inner rotational member rotatable relative to the outer rotary member, disposed in the spring accommodating space formed between the inner rotor and the outer rotary member are those provided with a torsion coil spring, the,
　in said rotating member, the surface facing the inner circumferential surface of the torsion coil spring, applying a grease containing a rust inhibitor, a manufacturing method of the pulley structure.
[Requested item 10]
　After application of the grease, the pulley structure connected to said auxiliary device, the power of the drive source via the belt by transmitted to the pulley structure to operate the pulley structure according to claim 9 manufacturing process of the pulley structure.
[Requested item 11]
　After mounting the torsion coil spring within said rotating body, a gap in the radial direction between the torsion coil spring and the inner rotating body, discharging the grease from one side of the rotation axis direction of the inner rotary body insert the nozzle, applying the grease on the facing surface, the manufacturing method of the pulley structure according to claim 9 or 10.
[Requested item 12]
　While the move to one side of the nozzle from the other side of the rotation axis direction, to eject the grease from the nozzle, the manufacturing method of the pulley structure according to claim 11.
[Requested item 13]
　The grease out of said surface to form a spring accommodation space, only applied to the facing surface of the inner rotating member, the manufacturing method of the pulley structure according to any one of claims 9-12.