JP2010281346A - One-way clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a one-way clutch which can be produced at reduced cost and can achieve stable operation. <P>SOLUTION: The one-way clutch 1 includes an outer shaft 3, rollers 6, and a torsion coil spring 7. The outer shaft 3 is disposed at an outer circumference side of a shaft member 2. The rollers 6 are disposed between the shaft member 2 and the outer shaft 3 in a radial direction. The torsion coil spring 7 is a member applying pressing force on the rollers 6 utilizing the torsional spring force thereof, and includes a contact section 72 for making contact with the roller 6 in the direction of the rotation of the shaft member 2 and in the direction opposite thereto. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a one-way clutch using an elastic member.

  The conventional one-way clutch includes, for example, an outer shaft, a plurality of rollers, and a plurality of elastic members. The outer shaft is disposed on the outer peripheral side of the shaft member, and has an annular main body portion and a plurality of projecting portions projecting radially inward from the main body portion. A roller and an elastic member are arranged between the rotation directions of adjacent protrusions. The elastic member presses the roller to one side in the rotational direction (see, for example, Patent Document 1).

JP 2003-214461 A

  In the conventional one-way clutch, for example, a coil spring is used as an elastic member. When using a coil spring, it is necessary to provide a cap at the tip of the coil spring, which increases the number of parts. As a result, it is difficult to reduce the manufacturing cost with the conventional one-way clutch.

  Therefore, a one-way clutch using a torsion coil spring as an elastic member has been proposed. If a torsion coil spring is used, the structure can be simplified and the manufacturing cost can be reduced.

  However, depending on the configuration of the portion where the torsion coil spring presses the roller, the elastic force of the torsion coil spring does not act evenly on the roller, and the operation of the roller and torsion coil spring becomes unstable.

  The subject of this invention is providing the one-way clutch which can implement | achieve stabilization of operation | movement, aiming at reduction of manufacturing cost.

  The one-way clutch according to the present invention is provided on a shaft member, and includes an outer shaft, a roller, and a torsion coil spring. The outer shaft is disposed on the outer peripheral side of the shaft member. The roller is disposed between the shaft member and the outer shaft in the radial direction. The torsion coil spring is a member that applies a pressing force to the roller using a torsion spring force, and has a contact portion that contacts the roller in the rotation direction of the shaft member and in the opposite direction.

  In this one-way clutch, since a torsion coil spring is used, unlike the case where a coil spring is used, a cap and a guide are not required. As a result, the structure can be simplified and the manufacturing cost can be reduced.

  Furthermore, since the contact portion of the torsion coil spring contacts the roller in the rotation direction of the shaft member and the opposite direction, the roller and the contact portion move integrally in the rotation direction and the opposite direction. As a result, the attitude of the torsion coil spring with respect to the roller is stabilized, and the elastic force of the torsion coil spring easily acts on the roller evenly. Thereby, the operation of the roller and the torsion coil spring is stabilized, and the operation of the one-way clutch can be stabilized.

  As described above, in the one-way clutch according to the present invention, the operation can be stabilized while the manufacturing cost is reduced.

The top view of a one way clutch. Sectional drawing of a one way clutch. The partial top view of a torsion coil spring and its periphery. FIG. 3 is a partial cross-sectional view of a torsion coil spring and its periphery. (A), (B) Single figure of a torsion coil spring (compression state). (A), (B) Single figure of torsion coil spring (free state). The partial top view of a torsion coil spring and its periphery. The partial top view of a torsion coil spring and its periphery (other embodiment).

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

<Overall configuration of one-way clutch>
The overall configuration of the one-way clutch 1 according to an embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic plan view of the one-way clutch 1. FIG. 2 is a sectional view of the one-way clutch 1 taken along II-II. In FIG. 1, an arrow R1 indicates the rotation direction of the shaft member 2, and an arrow R2 indicates the opposite direction. The OO line shown in FIG. 2 is the rotation axis of the shaft member 2.

  As shown in FIG. 1, a one-way clutch 1 is provided on the outer peripheral side of the shaft member 2 in order to restrict relative rotation in one specific direction between the shaft member 2 and another member (not shown). . Here, the one-way clutch 1 restricts the rotation of another member (not shown) with respect to the shaft member 2 in the R1 direction (an example of the rotation direction), and the R2 direction (rotation direction) of the other member with respect to the shaft member 2. Rotation in an example of the opposite direction) is allowed.

  Specifically, the one-way clutch 1 includes an outer shaft 3, a plurality of rollers 6, and a plurality of torsion coil springs 7. The outer shaft 3 is disposed on the outer peripheral side of the shaft member 2. The roller 6 is disposed between the shaft member 2 and the outer shaft 3 in the radial direction. The torsion coil spring 7 applies a pressing force to the roller 6 generally in the R1 direction.

  The one-way clutch 1 further has a cover 4 and a plate 9 disposed on the side of the outer shaft 3 in the axial direction. As shown in FIG. 2, the cover 4 is disposed so as to cover the first side surface 3 a of the outer shaft 3. The plate 9 is disposed so as to cover the second side surface 3 b of the outer shaft 3.

<Outer shaft and roller>
The outer shaft 3 is disposed on the outer peripheral side of the shaft member 2, and other members (not shown) are fixed thereto. The outer shaft 3 includes a substantially annular main body 31 disposed on the outer peripheral side of the shaft member 2 and a plurality of protrusions 32 that protrude radially inward from the main body 31.

  The main body 31 has an annular protrusion 31b protruding in the axial direction. The cover 4 is fitted on the inner peripheral side of the annular protrusion 31b. The annular protrusion 31b positions the cover 4 in the radial direction.

  The protrusions 32 are arranged at substantially equal pitches in the rotation direction of the shaft member 2. The cover 4 is fixed to the protrusion 32 by a rivet 34. A gap is formed between the protruding portion 32 and the shaft member 2 in the radial direction so that the protruding portion 32 does not contact the outer peripheral surface of the shaft member 2.

  A roller 6 is disposed between the rotation directions of the adjacent protrusions 32 and between the main body 31 and the shaft member 2 in the radial direction. The roller 6 is a columnar member for restricting or allowing relative rotation between the shaft member 2 and the outer shaft 3. The roller 6 is pressed substantially in the R1 direction by a torsion coil spring 7 supported by the outer shaft 3. It can also be said that the roller 6 is disposed between the shaft member 2 and the outer shaft 3 in the radial direction. Furthermore, it can be said that the outer shaft 3 has a pocket 11 as a space in which the roller 6 is disposed. The pocket 11 is formed on the inner side in the radial direction of the main body 31 and between the rotation directions of the adjacent protrusions 32. The roller 6 has an annular groove 6a. The groove 6 a is disposed in the center of the roller 6 in the axial direction (width direction). An end of a torsion coil spring 7 is fitted in the groove 6a (described later).

  Between the rotation directions of the adjacent protrusions 32, the main body 31 has an inclined portion 31a. The inclined portion 31a is substantially flat and is inclined so as to approach the shaft member 2 in the R1 direction. For this reason, the radial clearance formed between the inclined portion 31a and the shaft member 2 is gradually reduced in the R1 direction.

  For example, since the radial gap is set larger than the outer diameter of the roller 6 in the R2 side half of the pocket 11, the roller 6 can rotate between the shaft member 2 and the inclined portion 31a. On the other hand, since the radial gap is set smaller than the outer diameter of the roller 6 in the R1 side half of the pocket 11, the roller 6 is sandwiched between the shaft member 2 and the inclined portion 31a. The relative rotation of the shaft member 2 and the outer shaft 3 is restricted. In this state, a gap is secured between the rotation direction of the roller 6 and the protruding portion 32 on the R1 side of the roller 6. Since the roller 6 is pressed in the R1 direction by the torsion coil spring 7, when the shaft member 2 rotates in the R1 direction with respect to the outer shaft 3, the roller 6 is likely to be sandwiched between the shaft member 2 and the inclined portion 31a.

<Torsion coil spring>
The structure of the torsion coil spring 7 and its surroundings will be described with reference to FIGS. FIG. 3 is a partial plan view of the torsion coil spring 7 and its periphery. FIG. 4 is a partial sectional view of the torsion coil spring 7 and its periphery. FIGS. 5A and 5B are single views (compressed state) of the torsion coil spring 7. FIGS. 6A and 6B are single views (free state) of the torsion coil spring 7.

  As shown in FIGS. 3 to 4, the one-way clutch 1 is provided with a plurality of torsion coil springs 7 in order to press the roller 6 in the R1 direction. As shown in FIGS. 5 (A) to 6 (B), the torsion coil spring 7 is composed of a single wire, and comes into contact with a spring body 73 (an example of an elastic portion), a support portion 71, and a contact portion. Part 72.

  The spring body 73 is a portion wound in a coil shape to generate a torsion spring force. As shown in FIG. 4, in the present embodiment, the spring main body 73 is disposed on the side of the outer shaft 3 in the axial direction (on the cover 4 side). The support part 71 and the contact part 72 are elastically connected by the spring body 73.

  As shown in FIGS. 5A to 6B, the support portion 71 is a portion supported by the outer shaft 3, and includes a first support portion 71a and a second support portion 71b. Yes. The first support portion 71a is connected to the first end portion 73a of the spring body 73 (more specifically, the end portion disposed on the outer shaft 3 side), and the first support portion 71a is connected to the first end portion 73a of the outer shaft 3 from the first end portion 73a. It extends along one side surface 3a.

  As shown in FIGS. 3 to 4, the protrusion 32 of the outer shaft 3 has a support hole 35 penetrating in the axial direction. The second support portion 71 b extends in the axial direction from the end portion of the first support portion 71 a and is inserted into the support hole 35. Since the inner diameter of the support hole 35 is larger than the outer diameter of the second support portion 71 b, the second support portion 71 b can rotate within the support hole 35. Thus, the spring body 73 is supported with respect to the outer shaft 3 by the support hole 35 and the support portion 71 of the protrusion 32.

  As shown in FIG. 3, the contact portion 72 is a portion that transmits a pressing force to the roller 6, and contacts the roller 6 in the R1 direction and the R2 direction. Specifically, as shown in FIGS. 5A to 6B, the contact portion 72 includes an intermediate portion 72a and an annular portion 72b.

  The intermediate portion 72a is a portion connected to the second end portion 73b (more specifically, the end portion disposed on the side opposite to the outer shaft 3) of the spring body 73, and is substantially axially extending from the second end portion 73b. It extends to. As shown in FIGS. 5A and 5B, in the compressed state in which the torsion coil spring 7 is set, the intermediate portion 72 a extends in the axial direction and is in contact with the outer peripheral surface of the roller 6. On the other hand, as shown in FIGS. 6A and 6B, in the free state of the torsion coil spring 7, the intermediate portion 72a is slightly inclined with respect to the axial direction. The intermediate portion 72a is inclined with respect to the axial direction so that the spring body 73 is separated from the annular portion 72b. More specifically, as shown in FIG. 6A, the inclination angle of the intermediate portion 72a with respect to the axial direction is an angle α. Therefore, in the set state shown in FIGS. 5A and 5B, the intermediate portion 72 a and its peripheral portion are elastically deformed by the elastic force generated in the spring body 73, and the intermediate portion 72 a is substantially even on the outer peripheral surface of the roller 6. Abut. The end portion of the intermediate portion 72 a is disposed in the vicinity of the groove 6 a of the roller 6.

  As shown in FIG. 3, the annular portion 72b is a portion formed in a generally annular shape, and is provided at the end of the intermediate portion 72a. The annular portion 72b is wound around the roller 6 and disposed in the groove 6a. The annular portion 72b extends in an arc from the end of the intermediate portion 72a in the direction in which the roller 6 rotates when the one-way clutch 1 is locked by the roller 6. Since the annular portion 72 b is wound around the roller 6, the elastic force of the torsion coil spring 7 is reliably transmitted to the roller 6. Furthermore, since the annular portion 72b is fitted in the groove 6a, the torsion coil spring 7 is integrated with the roller 6 in the axial direction. It can be said that the torsion coil spring 7 is supported by the roller 6.

  The state shown in FIG. 3 is a state in which the roller 6 is sandwiched between the inclined portion 31 a of the outer shaft 3 and the shaft member 2. In this state, the torsion coil spring 7 is compressed in the rotational direction between the roller 6 and the support hole 35 of the protrusion 32, so that the roller 6 is always pressed in the R1 direction.

<Cover>
As shown in FIGS. 2 and 4, a cover 4 is arranged on the side of the outer shaft 3 in the axial direction so that the roller 6 and the torsion coil spring 7 do not fall off. Specifically, the cover 4 is a substantially disk-shaped member disposed so as to cover the first side surface 3a of the outer shaft 3, and includes a cover main body 41 and a plurality of fixings extending radially outward from the cover main body 41. Part 42.

  As shown in FIG. 2, the fixing portion 42 is fixed to the outer shaft 3 by a rivet 34. A cover portion 43 is disposed so as to correspond to the protruding portion 32 of the outer shaft 3. The roller 6 and the pocket 11 are disposed between the rotation directions of the adjacent fixing portions 42.

  A cover portion 43 is provided on the R2 side of the fixed portion. The cover portion 43 extends radially outward from the cover main body 41 and is disposed on the side of the roller 6 in the axial direction. The cover portion 43 has a smaller radial dimension than the fixed portion 42. For example, the radial dimension of the cover part 43 is approximately half of the radial dimension of the fixed part 42. The roller 6 can contact the cover portion 43 in the axial direction. Thereby, it is possible to prevent the roller 6 from falling off the pocket 11.

  A restricting portion 44 is provided on the R1 side of the fixed portion 42. The restricting portion 44 is provided so as to cover the support portion 71 (more specifically, the first support portion 71a) of the torsion coil spring 7, and is radially outward from the cover body 41 (from the fixed portion 42 to the R2 direction). ) It extends.

  As shown in FIG. 4, the restricting portion 44 has a recess 44 a that is disposed so as to face the protruding portion 32. The first support portion 71a is accommodated in the recess 44a. The range of the recess 44a is wider than the movable range of the first support portion 71a so that the movement of the torsion coil spring 7 in the rotational direction is not restricted by the cover 4.

  As shown in FIG. 4, the restricting portion 44 has a support surface 44b formed in the recess 44a. The support surface 44b faces the outer shaft 3 in the axial direction. A first support portion 71a is disposed between the first side surface 3a of the outer shaft 3 and the support surface 44b. A gap larger than the diameter of the first support portion 71a is secured between the first side surface 3a and the support surface 44b. Since the support surface 44b can contact the first support portion 71a in the axial direction, the movement of the first support portion 71a in the axial direction is restricted between the first side surface 3a and the support surface 44b in the axial direction.

  The shape of the cover 4 will be described from another viewpoint. Although the cover 4 includes the cover main body 41, the fixing portion 42, the cover portion 43, and the restriction portion 44, it can be considered that the cover 4 includes a plurality of notches 45. Specifically, as shown in FIGS. 1 and 4, the notches 45 are arranged at substantially equal pitches in the rotation direction, and are provided corresponding to the rollers 6 and the torsion coil springs 7. A spring body 73 of the torsion coil spring 7 is disposed in the notch 45. As will be described later, since the spring body 73 moves mainly in the rotational direction, it is necessary to secure a space in which the spring body 73 moves. Here, the movement space of the spring body 73 is secured as the notch 45.

  As shown in FIG. 4, since the axial dimension of the spring body 73 is smaller than the axial dimension (thickness) of the cover 4 (more specifically, the fixed portion 42, the cover portion 43, and the restricting portion 44), the spring body 73. Does not protrude from the cover 4 in the axial direction.

<Plate>
As shown in FIGS. 2 and 4, a plate 9 is arranged on the side of the outer shaft 3 in the axial direction so that the roller 6 does not fall off. Specifically, the plate 9 is an annular member that is fitted into the outer shaft 3 so as to cover the side surface of the outer shaft 3, and includes a disk-shaped plate body 91 and a cylindrical portion 92. Yes. The cylindrical portion 92 extends in the axial direction from the outer peripheral portion of the plate main body 91 and is fitted into the outer peripheral portion of the outer shaft 3. The plate body 91 covers the second side surface 3 b of the outer shaft 3 on the side opposite to the cover 4. Thereby, falling off of the roller 6 can be prevented.

<Operation of one-way clutch>
The operation of the one-way clutch 1 will be described with reference to FIG. FIG. 7 is an explanatory view of the operation of the roller 6 and the torsion coil spring 7.

  In FIG. 1, when the shaft member 2 rotates in the R1 direction with respect to the outer shaft 3, the roller 6 is pressed in the R1 direction by the torsion coil spring 7, so that the inclined portion 31a of the outer shaft 3 and the shaft member 2 A roller 6 is sandwiched between them. As a result, the relative rotation of the shaft member 2 and the outer shaft 3 is restricted by the roller 6, and the outer shaft 3 rotates integrally with the shaft member 2. Thereby, the power in the R1 direction of the shaft member 2 is transmitted to the outer shaft 3 via the roller 6.

  On the other hand, when the shaft member 2 rotates in the R2 direction with respect to the outer shaft 3, the roller 6 moves in the R2 direction against the pressing force of the torsion coil spring 7. As a result, the roller 6 can rotate between the inclined portion 31 a and the shaft member 2, and the outer shaft 3 can rotate with respect to the shaft member 2. Thereby, the power transmission from the shaft member 2 to the outer shaft 3 is interrupted.

  At this time, as the roller 6 moves in the R2 direction, the contact portion 72 of the torsion coil spring 7 is pushed by the roller 6 and the torsion coil spring 7 is compressed. As a result, as shown in FIG. 7, the support portion 71 rotates in the R2 direction with the second support portion 71b inserted into the support hole 35 as a fulcrum, and the spring body 73 moves outward in the R2 direction and the radial direction. The spring body 73 moves in the notch 45. Since the contact portion 72 is fixed to the roller 6, the state in which the torsion coil spring 7 presses the roller 6 and the posture of the torsion coil spring 7 are stabilized.

  Further, since the first support portion 71 a of the support portion 71 is accommodated in the recess 44 a of the restriction portion 44, the first support portion 71 a is supported by the support surface of the restriction portion 44 even if the torsion coil spring 7 moves in the direction of dropping. 44b. Thereby, the operation of the torsion coil spring 7 is stabilized.

<Features>
The characteristics of the one-way clutch 1 are as follows.

(1)
Since the one-way clutch 1 uses the torsion coil spring 7, unlike the case where the coil spring is used, a cap and a guide are not required. As a result, the structure can be simplified and the manufacturing cost can be reduced.

  Further, since the contact portion 72 of the torsion coil spring 7 is in contact with the roller 6 in the R1 direction and the R2 direction, the posture of the torsion coil spring 7 is stabilized.

  Further, since the annular portion 72b of the abutting portion 72 is disposed in the groove 6a, a configuration in which the torsion coil spring 7 moves integrally with the roller 6 in the axial direction can be realized, and the posture of the torsion coil spring 7 is further stabilized. To do. Therefore, the operation of the one-way clutch 1 can be stabilized. Further, since the torsion coil spring 7 is integrated with the roller 6 in the axial direction, there is no need to provide a portion on the outer shaft 3 to prevent the roller 6 from falling off, and the shape around the pocket 11 of the outer shaft 3 is eliminated. It can be simplified.

(2)
In the one-way clutch 1, the torsion coil spring 7 is rotatably supported by the outer shaft 3. More specifically, since the support portion 71 (more specifically, the second support portion 71b) of the torsion coil spring 7 is inserted into the support hole 35 of the outer shaft 3, it is supported by the protruding portion 32 of the outer shaft 3. The torsion coil spring 7 can be supported only by forming the hole 35. Thereby, the support structure of the torsion coil spring 7 can be simplified.

  In particular, since the second support portion 71b is inserted into the support hole 35, unnecessary torque does not act on the support portion 71, and the operation of the torsion coil spring 7 is stabilized. Thereby, the torsion coil spring 7 can be prevented from being damaged.

(3)
In the one-way clutch 1, since the spring main body 73 is disposed on the axial direction side of the outer shaft 3, it is not necessary to secure a large volume of the pocket 11 in order to accommodate the spring main body 73. Thereby, size reduction can be achieved, ensuring the intensity | strength of the outer shaft 3. FIG.

(4)
In the one-way clutch 1, the spring body 73 is disposed on the outer side in the radial direction than the support hole 35. Therefore, it is easy to secure a space for the spring body 73 to move when the torsion coil spring 7 is elastically deformed. Thereby, the structure which provides the torsion coil spring 7 in the side of the outer shaft 3 is easily realizable.

  In the above-described embodiment, by providing the cover 4 with the notch 45, a space in which the spring body 73 moves can be secured.

(5)
In the one-way clutch 1, since the movement of the support portion 71 in the axial direction is restricted by the restriction portion 44 of the cover 4, the torsion coil spring 7 is prevented from moving in the axial direction when the torsion coil spring 7 is elastically deformed. Can be prevented. Thereby, the operation of the torsion coil spring 7 is stabilized, and the operation of the one-way clutch 1 is also stabilized. Further, the torsion coil spring 7 can be prevented from falling off.

<Other embodiments>
The specific configuration of the present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the spirit of the present invention.

(1)
Although the structure which winds the edge part of the torsion coil spring 7 to the roller 6 is employ | adopted as shown in FIG. 8, the hole 6b is provided in the roller 6, and the edge part 7a (contact part) of the torsion coil spring 7 is provided in the hole 6b. For example) may be inserted. In this case, the end 7a of the torsion coil spring 7 can move integrally with the roller 6 in the rotation direction (direction around the rotation axis of the shaft member 2). Even with such a configuration, the posture of the torsion coil spring 7 is stabilized, and the operation of the one-way clutch 1 can be stabilized.

(2)
The arrangement of the torsion coil spring 7 is not limited to the above-described embodiment. For example, in the above-described embodiment, the spring body 73 of the torsion coil spring 7 is disposed on the side of the outer shaft 3 and is not accommodated in the pocket 11. However, the torsion coil spring 7 may be disposed in the pocket 11. In this case, the axial dimension of the one-way clutch 1 is shortened. When the torsion coil spring 7 is provided in the pocket 11, it is preferable to determine the shape of the pocket 11 in consideration of the space in which the torsion coil spring 7 moves.

(3)
The torsion coil spring 7 may be rotatably supported by the cover 4 or the plate 9.

(4)
The annular portion 72b is formed in a generally annular shape along the outer periphery of the roller 6. If the annular portion 72b is in contact with the roller 6 in the R1 direction and the R2 direction, the annular portion 72b is a circle along more than half of the outer periphery of the roller 6. It may be an arcuate part. Even in this case, the same effect as that of the above-described embodiment can be obtained.

  Conversely, the annular portion 72b may be wound around the roller 6 a plurality of times (for example, once and a half or twice).

(5)
In the above-described embodiment, the torsion coil spring 7 is in a free state, and the intermediate portion 72a is inclined with respect to the axial direction by an angle α, but the intermediate portion 72a extends in the axial direction (angle α = 0). Even so, the operation of the one-way clutch 1 can be stabilized.

(6)
The groove 6a of the roller 6 is disposed at the center in the axial direction, but the groove 6a may be slightly shifted from the center due to a dimensional error or the like. That is, it is only necessary that the groove 6a is arranged at the substantially center in the axial direction of the roller 6.

DESCRIPTION OF SYMBOLS 1 One-way clutch 2 Shaft member 3 Outer shaft 31 Main body part 31a Inclined part 32 Projection part 35 Support hole 4 Cover 41 Cover main body 42 Fixing part 43 Cover part 6 Roller 7 Torsion coil spring 71 Support part 72 Contact part 73 Spring main body ( Example of elastic part)

Claims (10)

A one-way clutch provided on the shaft member,
An outer shaft disposed on the outer peripheral side of the shaft member;
A roller disposed between the shaft member and the outer shaft in a radial direction;
A torsion coil spring that applies a pressing force to the roller using a torsion spring force, and has a contact portion that contacts the roller in the rotation direction of the shaft member and in the opposite direction;
One-way clutch with The contact portion has an annular portion formed in an arc shape or in an annular shape along the outer periphery of the roller.
The one-way clutch according to claim 1. The roller has a groove formed along the outer peripheral surface,
The annular portion is disposed in the groove;
The one-way clutch according to claim 2. The groove is disposed in the center of the roller in the axial direction.
The one-way clutch according to claim 3. The torsion coil spring is rotatably supported on the outer shaft.
The one-way clutch according to any one of claims 1 to 4. The outer shaft has an annular main body portion, and a protrusion having a support hole extending in the axial direction and extending radially inward from the main body portion,
The torsion coil spring includes the contact portion, a second end portion inserted into the support hole, an elastic portion that elastically connects the contact portion and the second end portion and generates the pressing force, have,
The one-way clutch according to claim 5. The elastic portion is disposed on the axial side of the outer shaft.
The one-way clutch according to claim 6. The elastic part is disposed radially outside the support hole,
The one-way clutch according to claim 6 or 7. A cover disposed on the axial direction side of the outer shaft;
The cover has a restricting portion that accommodates the second end portion in an axial direction with respect to the outer shaft and can contact the second end portion in the axial direction.
The one-way clutch according to any one of claims 6 to 8. The roller has a hole extending in the axial direction,
The contact portion is inserted into the hole extending in the axial direction.
The one-way clutch according to claim 1.

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