WO2019163874A1

WO2019163874A1 - Retainer for one-way clutch and sprag-type one-way clutch provided with same

Info

Publication number: WO2019163874A1
Application number: PCT/JP2019/006489
Authority: WO
Inventors: 理之冨加見
Original assignee: Ntn株式会社
Priority date: 2018-02-23
Filing date: 2019-02-21
Publication date: 2019-08-29
Also published as: JP2019143777A

Abstract

The present invention provides a retainer (10) which is for a one-way clutch and is provided with a pocket part (11) accommodating an engager (4) provided in an annular space between an outer ring (2) and an inner ring (3) and which is press-fitted to the outer ring (2), wherein: a convex part provided at the axial center of the retainer (10) is press-fitted to the outer ring (2); one axial side and the other axial side are symmetrical to each other with respect to the convex part; a press-fitting area in which the convex part is press-fitted and a non-press-fitting area in which the convex part is not press-fitted are alternately provided in a circumferential direction; and the non-press-fitting area is provided at a location which faces the press-fitting area with the axis center of the retainer (10) interposed therebetween.

Description

One-way clutch cage and sprag type one-way clutch provided with the same

The present invention relates to a cage for a one-way clutch and a sprag type one-way clutch provided with the same.

Generally, the one-way clutch has a configuration in which various engaging elements are disposed in a space between an inner ring and an outer ring that perform relative rotation. In particular, in the sprag type one-way clutch, the sprag arranged as an engagement member changes its posture depending on the rotation direction of the inner ring and the outer ring, and the relative rotation between the inner ring and the outer ring is allowed. It has a function to switch to a state that prevents general rotation.

This type of sprag type one-way clutch is provided with sprag insertion pockets at regular intervals along the circumferential direction of the annular cage. A sprag having a cross-sectional shape such as a gourd type is disposed in the pocket portion.

Each sprag has an outer ring side cam surface and an inner ring side cam surface formed by one or more curvature radii. The outer ring side cam surface engages with the inner circumferential raceway surface of the outer ring, and the inner ring side cam surface engages with the outer circumferential raceway surface of the inner ring.

Also, in a clutch called a sprag synchronous one-way clutch, the sprag is held at a constant interval in the circumferential direction by a cage, and each sprag is urged in the engagement direction by a ribbon spring.

Patent Document 1 discloses a cage that includes a flange portion projecting in an outer diameter direction at an axial end portion of an annular cylindrical portion, and press-fitting the flange portion into an inner peripheral surface of an outer ring. In the cage of Patent Document 1, a taper is provided in a direction in which the cylindrical portion has a smaller diameter as the distance from the flange portion increases. Then, when the retainer is assembled into the outer ring, the flange portion press-fitted into the outer ring is deformed in the diameter reducing direction, thereby eliminating the taper before assembling and forming a cylindrical shape.

Patent Document 2 discloses a cage having a flange portion that alternately has a large-diameter portion having a larger diameter than the inner peripheral surface of the outer ring and a small-diameter portion having a smaller diameter than the inner peripheral surface of the outer ring along the circumferential direction. Has been. In the cage of Patent Document 2, a notch is provided between the large-diameter portion and the small-diameter portion, and the large-diameter portion is bent by the notch having elasticity when incorporated into the outer ring.

JP 2004-116679 A JP 11-141577 A

In Patent Document 1, the portion of the cage that is press-fitted into the inner peripheral surface of the outer ring is positioned at one end in the axial direction, and the other axial end that is not press-fitted into the inner peripheral surface of the outer ring at the other end in the axial direction. The end of is located. For this reason, the cage is in a cantilever state with respect to the outer ring, and there is a concern that the cross-sectional shape of the cage may be collapsed when a large force exceeding the assumption is applied from the sprag to the cage after being press-fitted into the outer ring.

Similarly, in Patent Document 2, the cage is in a cantilever state with respect to the outer ring, and the press-fitted portion to the inner peripheral surface of the outer ring is only a part of the flange portion in the circumferential direction (large diameter portion). For this reason, if forced press-fitting is performed during the incorporation into the outer ring, a large force may act on the large diameter portion and the cage may be damaged. Moreover, a deformation | transformation arises in the cylinder part connected with the large diameter part by press injection of the large diameter part. At this time, since the diameter of the small diameter portion is smaller than that of the inner peripheral surface of the outer ring, the deformation amount of the cylinder portion connected to the small diameter portion is relatively smaller than the deformation amount of the cylinder portion connected to the large diameter portion. For this reason, there exists a possibility that the shape of a cylinder part may become a wave shape.

Therefore, an object of the present invention is to prevent the cage from being damaged when it is press-fitted into the outer ring during one-way clutch assembly, and to prevent the cage from being deformed after the press-fitting.

In order to solve the above-described problems, the present invention is a one-way clutch retainer that includes a pocket portion that accommodates an engagement element provided in an annular space between an outer ring and an inner ring, and is press-fitted into the outer ring. A convex portion provided in the center of the cage in the axial direction is press-fitted into the outer ring, the one axial side and the other axial side are symmetrical with respect to the convex portion, and the convex portion is press-fitted. The press-fitted region and the non-press-fitted region where the convex portion is not press-fitted are alternately provided in the circumferential direction, and the non-fitted region is provided at a position facing the press-fitted region across the axis of the cage. Adopted one-way clutch cage.

Further, it is possible to adopt a configuration in which at least three places are set in the circumferential direction for the press-fitting region. Furthermore, it is possible to adopt a configuration in which the axial range in which the pocket portion is set and the axial range in which the convex portion is set overlap in the axial direction.

It is possible to employ a sprag type one-way clutch configuration using a clutch retainer comprising these aspects and using a sprag as the engagement element.

According to this invention, it is possible to prevent the cage from being damaged when it is press-fitted into the outer ring during one-way clutch assembly, and to prevent the cage from being deformed after the press-fitting.

Whole front view of one-way clutch showing one embodiment of this invention The perspective view of the one-way clutch which shows one Embodiment of this invention The perspective view which shows the state which integrated the engagement element in the holder | retainer Perspective view showing details of cage Side view showing details of cage Sectional view showing details of cage Ribbon spring perspective view Sprag perspective view Enlarged view of the main part showing the positional relationship between the outer ring, inner ring, engagement element, cage, etc. The front view which shows the deformation | transformation state of a holder | retainer at the time of providing the press-fitting start part to the outer ring | wheel of a holder | retainer three places The top view which shows the deformation | transformation state of a holder | retainer at the time of providing the press injection start location to the outer ring | wheel of a holder | retainer three places Explanatory drawing which shows the state which inclined the holder | retainer deform | transformed like FIG. 7A and FIG. 7B with respect to the surface orthogonal to the axial center of an outer ring | wheel. Front view showing a state in which the cage is deformed into an oval shape The top view which shows the state which changed the cage into an ellipse Explanatory drawing which shows the state which inclined the holder | retainer deform | transformed like FIG. 9A and FIG. 9B with respect to the surface orthogonal to the axial center of an outer ring | wheel.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment is a sprag type one-way clutch 1 (hereinafter simply referred to as “clutch 1”), and further includes a clutch retainer 10 used for the clutch 1 and the incorporation of the clutch retainer 10 into the clutch 1. It is about the method. In addition, it is assumed that the clutch 1 of this embodiment is used for a torque converter of an automatic transmission of a vehicle equipped with an engine.

As shown in FIGS. 1 and 2, the clutch 1 includes an outer ring 2 having an inner circumferential raceway surface (inner circumferential surface) 2a, an inner ring 3 disposed coaxially within the outer ring 2 and having an outer circumferential raceway surface 3a, Sprags (hereinafter referred to as “sprags 4”) as a plurality of engagement elements 4 disposed in an annular space between the outer ring 2 and the inner ring 3 are provided. The sprag 4 transmits torque between the inner circumferential raceway surface 2a and the outer circumferential raceway surface 3a. The clutch 1 has a state in which the sprag 4 changes its posture according to the rotation directions of the inner ring 3 and the outer ring 2, thereby allowing relative rotation between the inner ring 3 and the outer ring 2 and preventing relative rotation. It has the function to switch to the state to do.

The clutch 1 engages the clutch retainer 10 (hereinafter referred to as “cage 10”) that holds the sprag 4 along the circumferential direction, and the sprag 4 to the inner raceway surface 2a and the outer raceway surface 3a. In order to bias in the direction, a ribbon spring (hereinafter referred to as “ribbon spring 5”) which is an elastic member 5 for sprag biasing disposed between the outer ring 2 and the inner ring 3 is provided. The clutch 1 of this embodiment is in the state of the clutch ASSY (including the outer ring 2, the retainer 10, the sprag 4, and the ribbon spring 5) when incorporated in an actual machine such as a torque converter. For the sake of easy understanding, the outer ring 2 is not shown.

3 to 4C, the retainer 10 is formed of an annular member, and includes the same number of pockets 11 as the number of sprags 4 along the circumferential direction. The pocket portions 11 are provided at equal intervals along the circumferential direction. The pocket portion 11 is partitioned along the circumferential direction by a plurality of pillar portions 13 that connect the pair of

annular portions

12, 12 parallel to each other in the axial direction of the clutch 1 in the axial direction. That is, the space between the column parts 13 adjacent to the circumferential direction is a pocket part 11 that penetrates the cage 10 from the inner peripheral surface side to the outer diameter side. The column portion 13 is a convex portion that is provided at the axially central portion of the cage 10 and protrudes radially outward from the outer peripheral edge of the annular portion 12. In the present embodiment, a part of the column portions 13 among the plurality of column portions 13 is a press-fit portion into which the outer ring 2 is press-fitted.

The pillar part 13 has a narrow part 13a and a pair of root parts 13b. The central portion of the column portion 13 in the axial direction, that is, the central portion of the column portion 13 with respect to the axial direction of the clutch 1 is continuous with the annular portion 12 and more than the root portion 13b extending radially outward from the outer peripheral edge of the annular portion 12. A narrow portion 13a having a narrow circumferential width is provided. The narrow portion 13a extends in the axial direction and connects the pair of root portions 13b. The root portion 13b extends from the outer peripheral edge of the annular portion 12 so as to be inclined radially outward and axially inward.

The narrow portion 13a has a rectangular shape when viewed from the radial direction. The outer diameter of the narrow portion 13 a is set to be slightly larger than the inner diameter of the outer ring 2. In other words, the outer diameter of the outer cage 10 a described later is larger than the inner diameter of the outer ring 2. When the column portion 13 is press-fitted into the outer ring 2, the outer peripheral surface 14 of the narrow portion 13 a comes into contact with the inner peripheral surface 2 a of the outer ring 2.

As shown in FIGS. 1 to 3 and 6, the clutch 1 of this embodiment includes an outer retainer 10 a disposed near the outer ring 2 and an inner retainer 10 b disposed near the inner ring 3. It consists of and. The ribbon spring 5 is disposed between the outer cage 10a and the inner cage 10b, and the clutch 1 functions as a sprag synchronous one-way clutch. For this reason, the structure of the said holder | retainer 10 provided with the convex part press-fit in the outer ring | wheel 2 is applied to the outer side holder | retainer 10a. It is also possible to employ a configuration in which the inner cage 10b is omitted and the cage 10 is disposed only on the outer diameter side of the ribbon spring 5.

The outer cage 10a is made of a metal material such as a cold rolled steel plate (SPCC), for example. The inner cage 10b is made of a resin or metal material.

The outer cage 10a is a welded cage having a joint W obtained by rounding a strip-shaped steel plate and joining both ends thereof by welding. In the outer cage 10a, a dummy pocket portion into which the sprag 4 is not inserted may be provided between the pocket portion 11 into which the sprag 4 is inserted and the pocket portion 11. When the dummy pocket portion is provided, the joint portion W may be provided in the dummy pocket portion. Since the sprag 4 is not inserted, the workability of manufacturing the outer cage 10a can be improved by providing the joint portion W in the dummy pocket portion that does not require dimensional management. Further, the outer cage 10a may be a press cage formed by punching a thin plate made of metal in a substantially circular shape, and then plastically deforming it by press working or the like and squeezing it into a cylindrical shape.

The ribbon spring 5 is arranged along the inner peripheral surface side of the outer cage 10a in order to bias the sprag 4 in the direction of engagement with the inner ring 3 and the outer ring 2. As shown in FIG. 5A, the ribbon spring 5 is composed of a strip-shaped member having a ladder shape similar to the cage 10, and a pair of

vertical members

5a and 5a arranged in parallel along the axial direction of the clutch 1, and a vertical member 5a. , 5a are provided at regular intervals along the circumferential direction.

The ribbon spring 5 is composed of an annular member made of a metal material. The ribbon spring 5 of this embodiment is formed in a cylindrical shape by using a band-shaped member obtained by stamping a thin metal plate by press working and welding the longitudinal ends thereof. In addition to the ribbon spring 5, for example, another elastic member 5 such as a coil spring may be employed.

The space between the

column portions

5b and 5b adjacent to each other in the circumferential direction of the ribbon spring 5 is a hole penetrating from the inner diameter side to the outer diameter side. This hole constitutes a sprag accommodating hole 5d for accommodating the sprag 4. Each sprag receiving hole 5d is provided with a tongue piece 5c that protrudes from the column portion 5b arranged near one end of the sprag receiving hole 5d toward the other side toward the inside of the sprag receiving hole 5d. The tongue piece 5c abuts against the side surface 4c of the sprag 4 in the vicinity of the narrow portion 13a, and biases the sprag 4 in the direction of engagement with the outer ring 2 and the inner ring 3.

As shown in FIG. 5B, the sprag 4 has a cam surface 4a, which is an engagement surface with the inner raceway surface 2a of the outer ring 2, on the outer diameter side, and an engagement with the outer raceway surface 3a of the inner ring 3 on the inner diameter side. The cam surface 4b which is a mating surface is provided.

As described above, since the outer cage 10a is a welded cage, as shown in FIG. 4B, an axial range P in which the pocket portion 11 is set and an axial range F in which the narrow portion 13a is set, It is set to overlap in the axial direction. As described above, the outer cage 10a is shaped to be press-fitted into the inner peripheral surface 2a of the outer ring 2 at the axial center portion thereof, so that when the clutch 1 is assembled, the outer cage 10a is protruded. There is a good balance between the force acting on one side in the axial direction of the outer cage 10a and the force acting on the other side in the axial direction across the portion. In particular, in this embodiment, the axial one side and the other axial side are symmetrical with respect to the axial center line (line passing through the axial center of the narrow portion 13a) L as a reference. With reference to the axial center line L, the force acting on one side in the axial direction and the force acting on the other side in the axial direction can be made close to each other. For this reason, the shape of the annular portion 12 and the column portion 13 around the pocket portion 11 does not collapse during press-fitting into the outer ring 2 as compared with a cage having a flange portion at one axial end portion.

Moreover, in this embodiment, since the convex part is set to the pillar part 13 which connects between a pair of

annular parts

12 and 12, there is little damage and deformation | transformation of the member at the time of the press injection to the internal peripheral surface 2a of the outer ring | wheel 2. it can. That is, in the conventional cage, there is a concern that if the force is press-fitted at the time of assembling, a large force acts on the flange portion that is the press-fitting portion and the member is cracked. One of the reasons is that the flange portion is a thin plate-like member that rises in the outer diameter direction. In addition, there is a concern that the cylindrical portion connected to the large diameter portion may be deformed unevenly along the circumferential direction due to the press-fitting of the large diameter portion.

However, if the convex portion is provided on the column portion 13 as in this embodiment, a relatively wide contact surface with respect to the outer ring 2 can be secured in the column portion 13, and therefore the force (surface pressure) generated in the outer cage 10a. As a result, it is possible to expect the effect that damage to the member can be suppressed. In addition, if the width (width in the circumferential direction) of the narrow portion 13a that sets the convex portion is increased, or if the axial range of the convex portion is increased, the force can be further dispersed.

In this embodiment, the outer cage 10a includes a plurality of press-fitting areas A, B, C,... Into which a plurality of convex portions are press-fitted at a predetermined interval M along the circumferential direction.

Specifically, as shown in FIGS. 7A and 7B, the outer cage 10a is a press-fit region A, B, C in which a plurality of convex portions are arranged in parallel before being press-fitted into the inner peripheral surface 2a of the outer ring 2. And a plurality of non-press-fit areas where the convex portions are not press-fitted between the press-fit areas A, B, and C adjacent to each other in the circumferential direction before being pressed into the inner peripheral surface 2a of the outer ring 2. N is set. The non-press-fitted region N is a region where there is a column portion 13 (a narrow portion 13a thereof) facing the inner peripheral surface 2a of the outer ring 2 with a gap in the radial direction.

In the entire outer periphery of the outer cage 10a, the ratio occupied by the non-press-fit area N is larger than the ratio occupied by the press-fit areas A, B, and C.

7A and 7B, in the outer cage 10a, the press-fitting regions A, B, and C are set at three locations along the circumferential direction. In the figure, in order to make the shape easy to understand, the curvatures in the press-fitted areas A, B, and C are emphasized and increased (the radius of the curve is reduced) and deformed. The difference in curvature between A, B, and C and the non-press-fitted region N is suppressed to a smaller extent than in FIGS. 7A and 7B. The outer retainer 10a is press-fitted into the inner peripheral surface 2a of the outer ring 2 in a state in which the perfect circle as shown in FIGS. The symbol R in the figure indicates a perfect circle state.

In this way, the press-fitting regions A, B, C to the inner peripheral surface 2a of the outer ring 2 are not provided over the entire outer periphery of the outer cage 10a, but are actually press-fitted into the inner peripheral surface 2a of the outer ring 2. Since the outer cage 10a is press-fitted into the inner peripheral surface 2a of the outer ring 2, the force acting on the outer ring 2 by press-fitting is applied to the press-fitting areas A, Since the light propagates evenly in the circumferential direction around B and C, the inner ring shape of the outer ring 2 is easily deformed. For this reason, generation | occurrence | production of the crack which is easy to occur at the time of the press fit in the outer ring | wheel 2 of the outer side holder | retainer 10a can be prevented.

Further, as shown in FIGS. 7A and 7B, the press-fit areas A, B, and C are set so as to avoid positions facing each other with the shaft center therebetween, and the non-press-fit area N is press-fitted with the shaft center O in between. Opposite areas A, B, and C. When the press-fitting areas A, B, and C are set at approximately equal intervals along the circumferential direction, such setting is possible if the number of the press-fitting areas A, B, and C is an odd number. However, since it is desirable to provide at least three press-fitting regions A, B, and C along the circumferential direction, the press-fitting regions A, B, and C are, for example, five, seven, etc. along the circumferential direction. be able to.

As described above, in the outer cage 10a, the press-fitting regions A, B, and C are at least three, and the non-press-fitting region N is opposed to the press-fitting regions A, B, and C with the axis O interposed therebetween. In the cage 10a, the region opposite to the region 180 ° across the axis O with respect to the region press-fitted into the inner peripheral surface 2a of the outer ring 2 is not in contact with the inner peripheral surface 2a of the outer ring 2 immediately before the press-fitting. That is, as shown in FIG. 8, with the outer cage 10a tilted with respect to the surface direction perpendicular to the axis O, one press-fitted region A is first addressed to the inner peripheral surface 2a of the outer ring 2. In the case where the outer ring 2 is bent, a portion (the other press-fit regions B and C) where the outer diameter of the outer cage 10a is relatively located on the outer diameter side with respect to the inner peripheral surface 2a of the outer ring 2 remains. Therefore, the outer cage 10a does not slip through the inner peripheral surface 2a of the outer ring 2 and go out to the opposite side. Here, the portion where the outer diameter of the outer cage 10a is larger than the inner peripheral surface 2a of the outer ring 2 refers to other press-fitting regions excluding the press-fitting region A that is first addressed to the inner peripheral surface 2a of the outer ring 2. B and C correspond. This is the same not only when the outer cage 10a is press-fitted alone, but also when the press-fitting is performed in the clutch ASSY state including the sprag 4 and the ribbon spring 5.

Here, it is assumed that a cage 10A having an elliptical shape with a major axis X and a minor axis Y is press-fitted into the outer ring 2A as shown in FIGS. 9A and 9B. The symbol R in the figure also shows the state of a perfect circle. In this case, if the major axis X, which is the longest diameter of the elliptical cage 10A, is greatly inclined with respect to the plane orthogonal to the axis O, the plane orthogonal to the axis O is obtained as shown in FIG. The length X ′ of the cage 10A with respect to the direction along the direction is shortened, and the cage 10A is detached. For example, if a locking flange portion that protrudes toward the inner diameter side is provided on the inner peripheral surface of the outer ring, the cage 10A is caught by the locking flange portion, so that it is possible to prevent the outer ring inner peripheral surface from slipping through to the opposite side. However, when the locking flange portion is provided on the inner peripheral surface of the outer ring, there is a problem that once the cage is press-fitted into the inner peripheral surface of the outer ring, it is difficult to disassemble. *

Further, in the outer cage 10a, the press-fitting regions A, B, and C are at least three, and the non-press-fitted region N is opposed to the press-fitting regions A, B, and C with the axis O interposed therebetween. When 10a is press-fitted into the inner peripheral surface 2a of the outer ring 2, the outer diameter shape of the outer cage 10a follows the inner diameter shape of the outer ring 2, and the outer diameter of the outer cage 10a can be easily brought close to a perfect circle. it can.

However, even in the portions of the outer cage 10a that are not press-fitted into the inner peripheral surface 2a of the outer ring 2 (portions other than the press-fitting regions A, B, and C), they are press-fitted into the inner peripheral surface 2a of the outer ring 2. Although it is not positive by the deformation, it may be considered that the inner ring 2a of the outer ring 2 is finally brought into contact with the inner peripheral surface 2a with a strong pressure and is pressed. The press-fitting regions A, B, and C in the present invention mean regions that first contact with the inner peripheral surface 2a of the outer ring 2 with pressure at the start of press-fitting of the outer cage 10a into the inner peripheral surface 2a of the outer ring 2. doing.

Also, in order to prevent the outer cage from slipping through, a method of providing a projection such as a locking flange on the inner peripheral surface of the outer ring can be considered. However, if you want to check and check the locking direction and idling direction of a clutch that is a one-way clutch, press the outer cage (or the clutch component unit that includes the cage 10) once and check and check the direction. Again, it is necessary to remove them from the inner peripheral surface of the outer ring. In this case, if there is a projection such as a locking flange on the inner peripheral surface of the outer ring, there arises a problem that it becomes difficult to remove the component from the inner peripheral surface of the outer ring. At this time, it can be considered that the shape of the protrusions such as the locking flange can be easily removed, but there is a problem that the inner peripheral surface of the outer ring becomes complicated and the outer ring for inspection becomes expensive. In this respect, according to the present invention, no projection such as a locking flange is required on the outer ring side, so that such a problem does not occur.

The amount of protrusion of the press-fitted regions A, B, and C to the outer peripheral side of the inner peripheral surface of the outer ring 2 immediately before press-fitting of the cage 10 is maintained at + 1% or less with respect to the dimension W of the inner peripheral surface of the outer ring 2. Immediately before the press fitting of the vessel 10, the reserve amount (gap) to the inner peripheral surface side of the outer ring 2 in the non-press-fitted region N should be 1% or less with respect to the dimension W of the inner peripheral surface of the outer ring 2. Is desirable. That is, it is desirable that the outer diameter of the cage 10 is configured to have a dimension of −1% to + 1% with respect to the dimension W of the inner peripheral surface of the outer ring 2. By setting in this way, when the retainer 10 is press-fitted into the inner peripheral surface of the outer ring 2, the built-in load does not become excessively difficult to be assembled, and the retainer 10 is more circular when assembled. Can be approached.

In this embodiment, the shape of the outer diameter of the outer ring 2 is cylindrical, but other than this, for example, the outer diameter of the outer ring 2 may be provided with irregularities or knurled. . In either case, the outer diameter of the outer ring 2 is integrated with the torque converter stator by press fitting or the like.

In the above embodiment, a sprag type one-way clutch for a torque converter of an automatic transmission using a sprag as the engagement element 4, a clutch retainer 10 used for the sprag type one-way clutch, and the clutch retainer 10 Although the method of incorporating into the clutch 1 has been described, the clutch 1 can be used for various purposes other than the torque converter.

1 Clutch (sprag type one-way clutch)
2 Outer ring 3 Inner ring 4 Engagement (sprag)
10 Cage 11 Pocket 13 Column

Claims

A cage for a one-way clutch comprising a pocket portion for accommodating an engagement element provided in an annular space between an outer ring and an inner ring, and press-fitted into the outer ring,
A convex portion provided in the axial center of the cage is press-fitted into the outer ring,
The axial one side and the other axial side are symmetrical with respect to the convex part,
The press-fitting region where the convex part is press-fitted and the non-press-fitted region where the convex part is not press-fitted are alternately provided in the circumferential direction,
The non-press-fit area is a one-way clutch retainer provided at a position facing the press-fit area across the axial center of the retainer.
The one-way clutch retainer according to claim 1, wherein at least three of the press-fitting regions are set along a circumferential direction.
The one-way clutch retainer according to claim 1 or 2, wherein an axial range in which the pocket portion is set and an axial range in which the convex portion is set overlap in the axial direction.
A sprag type one-way clutch comprising the one-way clutch retainer according to any one of claims 1 to 3 and using a sprag as the engagement element.