JP2008164034A - One-way clutch and one-way clutch unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance torque limiter operation torque, and to exert a torque limiter function in a desired opportunity. <P>SOLUTION: In the one-way clutch 8 with the torque limiter function, a thickness of a clutch outer ring part 81a is reduced than a thickness of a clutch inner ring part 72a in a cross section at a shift position of an engagement roller 83 to a roller drop-in groove 77. Thus, mainly the clutch outer ring part 81a is elastically deformed, and the accuracy of the torque limiter operation torque can be improved by controlling the thickness of the clutch outer ring part 81a. Therefore, the torque limiter function can be exerted in the desired opportunity, and damage of an engine auxiliary machine caused by excess torque can be prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a one-way clutch and a one-way clutch unit, and more particularly to a one-way clutch with a torque limiter function, and a one-way clutch unit that integrally includes a support bearing in the one-way clutch.

The one-way clutch is mounted on a pulley unit of an engine accessory that is driven via a belt from a crankshaft such as an automobile engine. Examples of the engine auxiliary machine include a compressor for an air conditioner, an alternator, a water pump, and a cooling fan.

For example, there are various types of compressors for an air conditioner of an automobile, and all of them use a rotational power of a crankshaft of an automobile engine as a drive source. Power transmission from the crankshaft to the rotating shaft of the compressor is performed via a belt.

Since the crankshaft varies in accordance with the combustion cycle of the engine, the variation in rotation is transmitted from the crankshaft to the rotating shaft of the compressor. When this rotational fluctuation increases, the belt tension fluctuation increases, and the belt tension fluctuation cannot be absorbed, causing slippage between the pulley and the contact portion of the belt, which may cause wear or damage to the belt. .

In addition, if the rotating shaft is locked due to the seizure of the compressor, the belt tension is abnormally increased and the belt may be damaged, or other engine accessories driven by the belt may become inoperable. Arise.

In order to eliminate such inconvenience, Patent Document 1 states that when an overload is applied, the wedge member relatively rotates the driving ring and the driven ring and is restricted to a state in which the switching operation is impossible. A power transmission device that operates as a torque limiter is disclosed.

Patent Document 2 discloses a roller-type one-way clutch provided with a roller drop groove as a torque limiter function. In this torque limiter, when an excessive torque is generated, the engaging roller rolls and enters the roller drop groove to cut off the torque.

5A and 5B are a side sectional view and a front sectional view of a conventional one-way clutch unit 200. FIG. The one-way clutch unit 200 includes a row of one-way clutches 108 adjacent in the axial direction and a support bearing 109 formed of a row of ball bearings. The one-way clutch unit 200 includes an integral outer ring 181 and an integral inner ring 172. The integral outer ring 181 is formed by integrating a clutch outer ring portion 181a of the one-way clutch 108 and a bearing outer ring portion 181b of the support bearing 109. It is a thing. The integral inner ring 172 is an integral part of the clutch inner ring portion 172a of the one-way clutch 108 and the bearing inner ring portion 172b of the support bearing 109. The one-way clutch 108 has engaging rollers 183 as a wedge member, the clutch outer ring portion 181a of the integral outer ring 181 has a cylindrical inner peripheral surface, and the clutch inner ring portion 172a of the integral inner ring 172 is an octagonal column. The cam surface 176 has a shape. The cam surface 176 is provided with a roller drop groove 177. The one-way clutch 108 and the support bearing 109 are lubricated with the same grease sealed between the integral outer ring 181 and the integral inner ring 172, and grease is provided at both ends in the axial direction between the integral outer ring 181 and the integral inner ring 172. Sealing members 111 and 112 are disposed for hermetically sealing. The one-way clutch 108 has a cage 182 that holds the engaging roller 183 while urging it in one direction by an urging spring 184 formed of a coil spring. The cage 182 has an engagement roller 183 fitted in the pocket 182a. The support bearing 109 has a crown-shaped cage 117 that holds a ball 116 as a rolling element. When the excessive torque is generated, the one-way clutch 108 rolls the engaging roller 183 and uses the elastic deformation of the integrated inner ring 172, the integrated outer ring 181 and the engaging roller 183 to enter the roller drop groove 177 to generate torque. It is designed to shut off. Hereinafter, such a one-way clutch is referred to as a one-way clutch with a torque limiter function.
JP 2002-106608 A JP 2003-028201 A

In conventional one-way clutches with torque limiter function, when excessive torque is generated, the engaging roller rolls and uses the elastic deformation of the inner ring, outer ring and engaging roller to enter the roller drop groove to cut off the torque. However, if the ratio of dimensional variation of the inner ring, outer ring, engaging roller, etc. is large with respect to the amount of elastic deformation (if the dimensional accuracy is poor), the variation in torque limiter operating torque increases, and when necessary However, there is a problem that the torque limiter function cannot be used.

SUMMARY OF THE INVENTION In view of the above, the object of the present invention is to provide a one-way clutch that can improve the accuracy of the torque limiter operating torque and to use the torque limiter function, and a support bearing in the one-way clutch. It is to provide a one-way clutch unit.

Means for Solving the Problems and Effects of the Invention

The one-way clutch according to claim 1 is a one-way clutch with a torque limiter function including an inner ring, an outer ring, an engaging roller, a cam surface, and a roller dropping groove, wherein the engaging roller is moved to the roller dropping groove. In the cross section, the thickness of the outer ring is smaller than the thickness of the inner ring. According to the one-way clutch of the first aspect, when the engagement roller enters the roller drop groove because the thickness of the outer ring is smaller than the thickness of the inner ring in the cross section of the engagement roller at the transition position to the roller drop groove. In particular, the outer ring is elastically deformed, and the accuracy of the torque limiter operating torque can be improved by controlling the thickness of the outer ring. For this reason, it is possible to use the torque limiter function where it is desired to prevent damage to the engine auxiliary equipment due to excessive torque.

In the one-way clutch according to claim 1, the thickness of the outer ring is 90% or less, preferably 70% or less of the thickness of the inner ring. According to such a one-way clutch, since the thickness of the outer ring is set to 90% or less, preferably 70% or less of the inner ring, the outer ring is more easily elastically deformed than the inner ring, and the thickness of the outer ring is controlled. By doing so, the accuracy of the torque limiter operating torque can be easily improved.

The one-way clutch unit according to claim 2 includes a one-way clutch with a torque limiter function including an inner ring, an outer ring, an engaging roller, a cam surface, and a roller drop groove, and a support bearing is integrated with the support bearing and the one-way clutch unit. A low-rigidity portion is provided on at least one of the inner ring or the outer ring at a position connected to the direction clutch. The one-way clutch unit also requires a support bearing for positioning (centering) the inner and outer rings. Without the support bearing, the wedge angle of the one-way clutch changes, and the torque limiter operating torque of the one-way clutch Will vary. For this reason, some one-way clutch units include a support bearing integrated with the one-way clutch. In such a one-way clutch unit, the rigidity of the one-way clutch is also affected by the rigidity of the support bearing. Therefore, install the support bearing as far away from the one-way clutch as possible so that the influence of the rigidity of the support bearing does not reach the one-way clutch as much as possible, or influence the rigidity between the one-way clutch and the support bearing. It is sufficient to provide a low-rigidity part so as not to reach. According to the one-way clutch unit of the second aspect, since the low rigidity portion is provided in at least one of the inner ring or the outer ring at the position where the support bearing and the one-way clutch are connected, the rigidity between the one-way clutch and the support bearing is determined. The influence of can be cut off. However, even a low-rigidity part requires at least strength and rigidity (thickness) for torque transmission between the one-way clutch and the support bearing.

In the one-way clutch unit according to claim 2, it is preferable that the low-rigidity portion is provided in the outer ring. In a one-way clutch with a torque limiter function, a clutch in which a cam surface is provided on the outer peripheral surface of the inner ring and a circumferential surface is provided on the inner peripheral surface of the outer ring is generally used. Since the circumferential surface is easier to control the thickness accuracy than the cam surface, in such a case, in order to improve the accuracy of the torque limiter operating torque, the outer ring having the circumferential surface on the inner circumferential surface is used. A low rigidity portion may be provided. According to such a one-way clutch unit, since the outer ring is provided with the low rigidity portion, the influence of the support bearing on the thickness of the outer ring for controlling the accuracy of the torque limiter operating torque can be easily cut off. it can.

In the one-way clutch unit according to claim 2, it is desirable that the low rigidity portion is a thin portion. According to such a one-way clutch unit, since the low-rigidity portion is a thin-walled portion, necessary torque transmission can be performed, and the influence of the rigidity of the support bearing can be easily interrupted during an overload. The low-rigidity part may be not only a thin-walled part but also other forms such as a groove, a continuous hole, and a low-rigidity welded part.

The one-way clutch unit according to a third aspect is the one-way clutch unit according to the second aspect, wherein the low-rigidity portion is a notch portion that induces bending deformation outward in the radial direction. According to the one-way clutch unit of the third aspect, since the low-rigidity portion is a notch portion that induces bending deformation outward in the radial direction, necessary torque transmission is performed, but the rigidity of the support bearing is excessive during overload. Can be easily cut off.

The one-way clutch unit according to claim 4 is the one-way clutch unit according to claim 2 or 3, wherein the thickness of the outer ring of the one-way clutch is smaller than the thickness of the outer ring of the support bearing at the position of the cross section. It is characterized by. According to the one-way clutch unit of the fourth aspect, since the thickness of the outer ring of the one-way clutch is smaller than the thickness of the outer ring of the support bearing, sufficient rigidity for positioning (centering) the inner ring and the outer ring on the support bearing. On the other hand, the accuracy of the torque limiter operating torque can be improved according to the thickness of the outer ring of the one-way clutch.

If the ratio of dimensional variation to the elastic deformation of the inner ring or outer ring of the one-way clutch is large, the torque limiter operating torque may vary. Was made smaller than the thickness of the inner ring.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side sectional view of a pulley unit in which a one-way clutch unit according to a first embodiment of the present invention is disposed. FIGS. 2A and 2B are a side sectional view and a front sectional view of a one-way clutch. FIG. 3 is a plan development view showing the inside of the pocket of the one-way clutch, and FIG. 4 is a cross-sectional view showing the main part of the one-way clutch. In the figure, 1 is a compressor for an air conditioner as an engine auxiliary machine, 2 is a pulley unit, 3 is a belt, and 100 is a one-way clutch unit.

Although the detailed configuration of the compressor 1 is omitted, it is generally called a known continuously variable capacity type. For example, the stroke of a reciprocating piston is driven by a piston such as a swash plate type or a waffle type. By changing the inclination angle of the swash plate of the mechanism, the compressor discharge capacity is continuously variable between 0 and 100%. Note that the compressor 1 is in an off state in which the compression operation is not performed by setting the swash plate to a neutral posture, and is not equipped with a general electromagnetic clutch of a compressor that is controlled on and off. It has become. In the compressor 1 of this type, when the rotating shaft 4 is locked due to the occurrence of a seizure failure, the torque limiter function of the one-way clutch unit 2 described below works, and the compressor 1 The compressor 1 is protected by interrupting the power transmission.

The pulley unit 2 is attached to the rotating shaft 4 of the compressor 1 and is rotated via a belt 3 from a crankshaft of an automobile engine (not shown). The pulley 5, the hollow shaft 6, the double row rolling bearing 7 , And a one-way clutch unit 100.

The one-way clutch unit 100 uses the one-way clutch 8 and the support bearing 9 to absorb the rotation fluctuation of the pulley 5 due to the tension fluctuation of the belt 3, and from the belt 3 to the compressor 1 in the event of an overload. And a torque limiter function for interrupting power transmission to the rotary shaft 4.

A wave-like groove around which the belt 3 is wound is formed on the outer periphery of the pulley 5.

The hollow shaft 6 is inserted into the inner periphery of the pulley 5 and is fixed to the rotating shaft 4 of the compressor 1.

The double-row rolling bearing 7 is interposed between the pulley 5 and the hollow shaft 6, and includes a single inner ring and outer ring (the same member as an integrated inner ring 72 described later), rolling elements such as a plurality of balls, It is a double row angular contact ball bearing having two cages in which rolling elements are arranged in two rows. The double row rolling bearing 7 is provided with a seal member for preventing a lubricant such as internal grease from leaking.

2A and 2B show a side sectional view and a front sectional view of the one-way clutch unit 100. FIG. The one-way clutch unit 100 includes a row of one-way clutches 8 adjacent in the axial direction and a support bearing 9 formed of a row of ball bearings. The one-way clutch unit 100 includes an integral outer ring 81 and an integral inner ring 72. The integral outer ring 81 is formed by integrating a clutch outer ring portion 81a of the one-way clutch 8 and a bearing outer ring portion 81b of the support bearing 9. It is a thing. Further, the integral inner ring 72 is formed by integrating the clutch inner ring portion 721 a of the one-way clutch 8 and the bearing inner ring portion 72 b of the support bearing 9.

The one-way clutch 8 is disposed in a power transmission path from the pulley 5 to the rotating shaft 4 of the compressor 1. The one-way clutch 8 is a clutch inner ring portion 72 a, a clutch outer ring portion 81 a, and a synthetic resin annular shape. A cage 82, a plurality of engaging rollers 83, and an urging spring 84 formed of a coil spring having an elliptical cross section are provided.

The inner ring 72 also serves as the outer ring of the double-row rolling bearing 7 on which the pulley 5 is integrally fitted and fixed, and a flat cam surface 76 is formed in an octagonal prism shape on the outer peripheral surface of the clutch inner ring portion 72a. Has been. The cam surface 76 and a portion facing the cylindrical inner peripheral surface of the clutch outer ring portion 81a form a wedge-shaped space that narrows toward one side in the circumferential direction. Each cam surface 76 is provided with a roller drop groove 77 having a substantially semicircular cross section for fitting and holding the engaging roller 83 when an overload is applied.

The integral outer ring 81 is fitted and fixed to the inner periphery of the cylindrical portion 10a of the annular plate 10 fixed to the shaft end of the rotary shaft 4 of the compressor 1 to which the hollow shaft 6 is fixed by the cap nut 4a. The clutch outer ring portion 81a of the integrated outer ring 81 has a cylindrical inner peripheral surface.

The cage 82 has an octagonal prism-shaped inner peripheral surface portion, and the octagonal prism-shaped inner peripheral surface portion is fitted to the octagonal prism-shaped cam surface 76 of the clutch inner ring portion 72a. The cage 82 is packaged in a state of being positioned in the circumferential direction and the axial direction with respect to the clutch inner ring portion 72a, and in a region corresponding to the eight cam surfaces 76, a pocket is formed penetratingly formed inside and outside in the radial direction. 82a is provided. As shown in FIGS. 3 and 4, the retainer 82 accommodates an engaging roller 83 as a wedge member in its pocket 82 a so that it can roll while being urged by an urging spring 84.

The engaging rollers 83 are made of steel cylinders, and are accommodated in the respective pockets 82a of the cage 82 so as to be able to roll in the circumferential direction. Although the wedge member is the engaging roller 83, the wedge member may be a ball.

The urging spring 84 is attached to a protrusion 82b projecting from the inner wall surface of each pocket 82a of the cage 82, and the engaging roller 83 is formed by the cam surface 76 and the inner peripheral surface of the clutch outer ring portion 81a. It pushes to the narrow side (lock side) of the wedge-shaped space. Although the urging spring 84 is a coil spring, the urging spring 84 may be a leaf spring or a disc spring.

By the way, in the one-way clutch 8, the thickness of the outer ring portion 81a for the clutch is set to be smaller than the thickness of the inner ring portion 72a for the clutch in the cross section at the transition position of the engaging roller 83 to the roller drop groove 77. For example, the thickness of the clutch outer ring portion 81a is set to 90% or less, preferably 70% or less, of the thickness of the clutch inner ring portion 72a. As a result, the clutch outer ring portion 81a is mainly elastically deformed when the engaging roller 83 enters the roller drop groove 77, and the torque of the one-way clutch 8 is controlled by controlling the thickness of the clutch outer ring portion 81a. The accuracy of the torque limiter operating torque by the limiter function can be improved. Specifically, the torque limiter operating torque in the torque limiter function of the one-way clutch 8 is determined by the thickness of the outer ring portion 81a for the clutch in the cross section at the position where the engaging roller 83 is transferred to the roller drop groove 77 and the length of the engaging roller 83. Assuming that the length of the engaging roller 83 is constant, the accuracy of the torque limiter operating torque is determined by the outer ring portion for clutch in the cross section at the transition position of the engaging roller 83 to the roller drop-off groove 77. The thinner the thickness of 81a, the higher the accuracy. In particular, since the outer peripheral surface of the clutch inner ring portion 721a is the cam surface 76 and the inner peripheral surface of the clutch outer ring portion 81a is the circumferential surface, it is easier to control the thickness of the clutch outer ring portion 81a and the torque limiter. It is easy to increase the accuracy of the operating torque. However, it is necessary to make the thickness of the outer ring portion 81a for the clutch thinner than the thickness of the inner ring portion 721a for the clutch on the condition that the necessary minimum strength of the torque limiter operating torque is ensured.

The support bearing 9 holds a plurality of balls 91 as rolling elements by means of a crown-shaped cage 92 between a bearing outer ring portion 81 b of the integral outer ring 81 and a bearing inner ring portion 72 b of the integral inner ring 72. It is comprised by doing.

The one-way clutch 8 with a torque limiter function requires a support bearing 9 for positioning (centering) the clutch inner ring portion 72a and the clutch outer ring portion 81a. Without the support bearing 9, the wedge angle of the one-way clutch 8 changes, and the torque limiter operating torque of the torque limiter function of the one-way clutch 8 varies. However, since the one-way clutch 8 is also affected by the rigidity of the support bearing 9, the clutch outer ring portion 81 a and the support of the one-way clutch 8 are supported so that the influence of the rigidity of the support bearing 9 does not reach the one-way clutch 8 as much as possible. A low rigidity portion 81c as a thin portion is provided at a position where the bearing 9 is connected to the bearing outer ring portion 81b. Note that the low-rigidity portion 81c may have other forms such as a notch portion, a groove, a continuous hole, and a low-rigidity welded portion that induces bending deformation outward in the radial direction. The low-rigidity portion 81 c may be provided on the inner ring 72 side where the one-way clutch 8 and the support bearing 9 are connected.

The thickness of the outer ring portion 81a for the clutch of the one-way clutch 8 is set to be smaller than the thickness of the outer ring portion 81b for the bearing of the support bearing 9 at the position of the cross section at the transition position of the engaging roller 83 to the roller drop groove 77. Yes. Since the outer ring portion 81b for the bearing is relatively thick, sufficient rigidity for positioning (centering) the inner ring portion 72b for the bearing and the outer ring portion 81b for the bearing on the support bearing 9 can be obtained. Since the thickness of the portion 81a is relatively thin, it is easy to control the thickness of the outer ring portion 81a for the clutch, and the accuracy of the torque limiter operating torque of the torque limiter function of the one-way clutch 8 can be improved.

The one-way clutch 8 and the support bearing 9 are lubricated with the same grease enclosed between the integral outer ring 81 and the integral inner ring 72, and grease is provided at both ends in the axial direction between the integral outer ring 81 and the integral inner ring 72. Sealing members 11 and 12 are arranged for hermetically sealing. The seal member 11 has a base portion having a metal core fixed to an annular step formed on the inner periphery of one end in the axial direction of the integrated outer ring 81, and a lip portion slidably contacting the outer peripheral surface of one end in the axial direction of the integrated inner ring 72. It is like that. On the other hand, the seal member 12 has a base portion having a metal core fixed to an annular step formed on the inner periphery of the other end in the axial direction of the integral outer ring 81, and a lip portion of the outer periphery of the other end in the axial direction of the integral inner ring 72. It comes into sliding contact with the step formed on the surface.

Next, the operation of the one-way clutch unit 100 according to the first embodiment configured as described above will be described together with the operation of the pulley unit 2.

In the pulley unit 2, the pulley 5 is driven to rotate by the belt 3, and power is transmitted from the pulley 5 to the rotating shaft 4 of the compressor 1 through the one-way clutch 8 and the annular plate 10.

Here, when the rotational speed of the pulley 5 becomes relatively faster than the rotational shaft 4 of the compressor 1, the engaging roller 83 of the one-way clutch 8 is rolled to the narrow side of the wedge-shaped space to be locked. Therefore, the three of the pulley 5, the annular plate 10, and the rotating shaft 4 of the compressor 1 are integrated and rotated synchronously.

On the other hand, when the rotation speed of the pulley 5 becomes relatively slower than the rotation shaft 4 of the compressor 1, the engaging roller 83 of the one-way clutch 8 is rolled to the wide side of the wedge-shaped space and becomes free. The transmission of the rotational power from the pulley 5 to the rotary shaft 4 of the compressor 1 is interrupted, and the rotary shaft 4 continues to rotate only with the rotary inertia force. As a result, the rotational fluctuation transmitted from the crankshaft (not shown) to the pulley 5 is absorbed, and the rotation of the rotating shaft 4 is kept substantially constant.

For example, when the load torque reaches a predetermined specified value (for example, 60 Nm) by locking the rotating shaft 4 and the annular plate 10 due to a seizure failure of the compressor 1, the engaging roller 83 is locked in the wedge-shaped space. As a result of being rolled over to a narrower position, the roller falls into the roller drop groove 77 of the cam surface 76. Along with this, the engaging roller 83 is in a non-contact or idling state with respect to the pulley 5, so that only the pulley 5 rotates and power transmission from the pulley 5 to the rotating shaft 4 of the compressor 1 is interrupted. Serves as a torque limiter. Thus, since the pulley 5 continues to rotate even when it is overloaded, the belt 3 can be prevented from slipping on the pulley 5 and can contribute to the improvement of the life of the belt 3, and can be connected through the compressor 1 and the belt 3. It will serve as a fail-safe because it will not adversely affect other engine accessories.

However, once the engagement roller 83 enters the roller drop groove 77, the engagement roller 83 cannot be separated from the roller drop groove 77 and returned to the locked position. That is, in such a state, the one-way clutch 8 can only be disassembled to return the position of the engaging roller 83, or the one-way clutch unit 100 itself can be replaced.

According to the first embodiment, since the thickness of the outer ring portion 81a for the clutch is smaller than the thickness of the inner ring portion 72a for the clutch in the cross section of the engagement roller 83 at the transition position to the roller drop groove 77, the engagement roller 83 is The clutch outer ring portion 81a is mainly elastically deformed when entering the roller drop groove 77, and the accuracy of the torque limiter operating torque can be improved by controlling the thickness of the clutch outer ring portion 81a. For this reason, it is possible to use the torque limiter function where it is desired to prevent damage to the engine auxiliary equipment due to excessive torque.

Further, according to the first embodiment, since the low rigidity portion 81 c is provided at the connecting position between the support bearing 9 and the one-way clutch 8 of the integrated outer ring 81, the influence of the rigidity between the one-way clutch 8 and the support bearing 9. Can be cut off.

Furthermore, according to the first embodiment, since the thickness of the outer ring portion 81a for the clutch of the one-way clutch 8 is smaller than the thickness of the outer ring portion 81b for the bearing of the support bearing 9, the integral inner ring 72 and the integral outer ring 81 are provided on the support bearing 8. While sufficient rigidity for positioning (centering) can be obtained, the accuracy of the torque limiter operating torque can be improved according to the thickness of the clutch outer ring portion 81a of the one-way clutch 9.

As described above, the first embodiment of the present invention has been described. However, this is merely an example, and the present invention is not limited to this, and the knowledge of those skilled in the art can be obtained without departing from the scope of the claims. Various modifications based on this are possible.

For example, in the first embodiment, the cam surface 76 is formed on the clutch inner ring portion 72a, but a cam surface may be provided on the clutch outer ring portion 81a.

In the first embodiment, the support bearing 9 is disposed on one side of the one-way clutch 8, but the support bearing 9 may be disposed on both sides of the one-way clutch 8.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a pulley unit in which a one-way clutch unit according to Embodiment 1 of the present invention is disposed. (A) And (b) is side sectional drawing and front sectional drawing of a one-way clutch unit. FIG. 3 is a plan development view showing the inside of the one-way clutch pocket of the first embodiment. Sectional drawing which shows the principal part in the one-way clutch of Example 1. FIG. (A) And (b) is side sectional drawing and front sectional drawing of the conventional one-way clutch unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compressor 2 Pulley unit 3 Belt 4 Rotating shaft 5 Pulley 6 Hollow shaft 7 Double row rolling bearing 8 One-way clutch 9 Support bearing 72 Inner ring 72a Inner ring part for clutch (inner ring)
72b Inner ring portion for bearing 76 Cam surface 77 Roller drop groove 81 Outer ring 81a Outer ring portion for clutch (outer ring)
81b Bearing outer ring portion 82 Cage 82a Pocket 83 Engagement roller 84 Biasing spring 100 One-way clutch unit

Claims (4)

In one-way clutch with torque limiter function including inner ring, outer ring, engaging roller, cam surface and roller drop groove,
The one-way clutch characterized in that a thickness of the outer ring is smaller than a thickness of the inner ring in a cross section of the engagement roller at a transition position to the roller drop groove. It has a one-way clutch with a torque limiter function that includes an inner ring, outer ring, engaging roller, cam surface, and roller drop groove.
A one-way clutch unit, wherein a support bearing is integrated, and a low-rigidity portion is provided in at least one of the inner ring or the outer ring at a position where the support bearing and the one-way clutch are connected. The one-way clutch unit according to claim 2, wherein the low-rigidity part is a notch part that induces bending deformation outward in the radial direction. The one-way clutch unit according to claim 2 or 3, wherein a thickness of the outer ring of the one-way clutch is smaller than a thickness of the outer ring of the support bearing at the position of the cross section.

Images