JP2018155353A - Clutch and motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clutch capable of suppressing generation of noise when starting rotational drive of a drive side rotor.SOLUTION: A rolling element 44 arranged between a driven side rotor to which a rotational driving force from a drive side rotor 42 is transmitted and a clutch housing 41 prevents rotation of the driven side rotor by being pinched between the clutch housing 41 and the driven side rotor when the drive side rotor 42 is not rotationally driving. A support member 43 which holds the rolling element 44 and which can integrally rotate with the drive side rotor 42 includes first and second inclined surfaces 69a, 69b for generating a load which makes it hard for the support member 43 to rotate around a rotation axis line of the drive side rotor 42 when starting rotational drive of the drive side rotor 42. When starting rotational drive of the drive side rotor 42, by the drive side rotor 42 pressing the rolling element 44 via the support member 43 in a rotation direction, the pinching of the rolling element 44 by the clutch housing 41 and the driven side rotor is cancelled.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a clutch and a motor.

  2. Description of the Related Art Conventionally, a motor used as a drive source for a power window device or the like mounted on a vehicle has a motor unit having a rotating shaft that is driven to rotate and a driven shaft that transmits the rotational driving force of the rotating shaft. And an output unit that outputs the rotational driving force transmitted to the motor. For example, as described in Patent Document 1, the rotating shaft and the driven shaft transmit the rotational driving force of the rotating shaft to the driven shaft while not transmitting the rotational force from the driven shaft side to the rotating shaft. It is connected via a clutch that operates on

  The clutch described in Patent Document 1 includes a drive-side rotator that rotates integrally with a rotation shaft, a driven-side rotator that can engage with the drive-side rotator in the rotation direction, and rotates integrally with the driven shaft, and a drive-side rotation. And a cylindrical clutch housing in which the body and the driven side rotating body are inserted. Further, between the inner peripheral surface of the clutch housing and the driven side rotator, the driven shaft is sandwiched between the inner peripheral surface of the clutch housing and the driven side rotator when the rotary shaft is not driven to rotate (becomes a wedge). A rolling element for preventing the rotation of the side rotating body (that is, the rotation of the driven shaft) is interposed. This rolling element is held by a support member inserted inside the clutch housing.

  In such a clutch, at the start of rotational driving of the rotating shaft, the driving-side rotating body contacts the support member from the rotating direction of the driving-side rotating body, and the rolling element is moved in the rotating direction of the driving-side rotating body via the support member. By pressing, the holding of the rolling element by the inner peripheral surface of the clutch housing and the driven rotating body is released. When the rotary shaft is rotationally driven, the support member rotates about the rotational axis of the drive side rotator together with the drive side rotator. Therefore, at the time of rotational driving of the rotating shaft, the rolling element rotates with the driving side rotating body and the driven side rotating body around the rotation axis of the driving side rotating body along the inner peripheral surface of the clutch housing while being held by the support member. .

JP 2012-82952 A

  As described above, at the start of rotational driving of the rotating shaft (driving side rotating body), the driving side rotating body rotates relative to the support member, and the driving side rotating body changes from the rotation direction of the driving side rolling element to the support member. Abut. Then, when the rolling element is pressed in the rotation direction of the driving side rotating body through the support member while the driving side rotating body is in contact with the support member, the rolling element is constituted by the inner peripheral surface of the clutch housing and the driven side rotating body. Is released. In this case, even if the driven-side rotator that has been rotated integrally with the drive-side rotator after the unclamping of the rolling element is about to be sandwiched between the inner peripheral surface of the clutch housing, Since the driving side rotating body keeps pressing against the support member from the rotation direction, the support member holding the rolling element rotates integrally with the driving side rotating body. Therefore, the holding of the rolling element by the inner peripheral surface of the clutch housing and the driven rotating body is immediately released. Therefore, in this case, it is possible to smoothly release the rolling element between the inner peripheral surface of the clutch housing and the driven-side rotating body, and it is difficult for noise to be generated in the clutch at the start of rotational driving of the rotating shaft.

  However, the support member that holds the rolling element is blown in the rotation direction of the driving-side rotating body due to an impact when the driving-side rotating body comes into contact with the support member at the start of rotational driving of the rotating shaft. May rotate ahead of the drive-side rotator. Then, even if the rolling body is once released from the holding by the inner peripheral surface of the clutch housing and the driven side rotating body, the rotational speed increases until the driving side rotating body again comes into contact with the support member. It is clamped again between the inner peripheral surface of the clutch housing by the rotating body. Then, when the driving side rotating body comes into contact with the support member again to release the holding of the rolling body by the inner peripheral surface of the clutch housing and the driven side rotating body, the impact becomes large and noise is generated. . Further, the support member holding the rolling element again rotates before the driving side rotating body due to an impact when the driving side rotating body comes into contact with the support member again, and the above operation may be repeated. is there. In such a case, noise is generated a plurality of times in the clutch before the rolling element is completely held between the inner peripheral surface of the clutch housing and the driven side rotating body.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a clutch and a motor that can suppress the generation of noise at the start of the rotational driving of the driving side rotating body. is there.

  A clutch that solves the above problems includes an annular clutch housing, a drive-side rotator that is rotationally driven, a driven-side rotator that is inserted inside the clutch housing and to which a rotational drive force is transmitted from the drive-side rotator. , Disposed between the inner peripheral surface of the clutch housing and the driven-side rotator, and rotates around the rotation axis of the drive-side rotator together with the drive-side rotator when the drive-side rotator is driven to rotate, A rolling element that prevents rotation of the driven-side rotating body by being sandwiched between the clutch housing and the driven-side rotating body when the driving-side rotating body is not rotated, an inner peripheral surface of the clutch housing, and the A support member that holds the rolling element between the driven-side rotating body and is rotatable about the rotation axis of the driving-side rotating body together with the driving-side rotating body, and the driving-side rotating body At the start of rotational driving, the driving side rotating body abuts on the support member from the rotating direction and presses the rolling body in the rotating direction via the support member, whereby the clutch housing and the driven side rotating body A clutch for releasing the holding of the rolling element, wherein the support member makes it difficult to rotate the support member around the rotation axis of the driving side rotating body at least when the driving side rotating body starts to rotate. The load generation part which generates is provided.

  According to this configuration, since the support member includes the load generation unit, it is difficult for the support member to rotate around the rotation axis of the driving side rotating body at the start of the rotational driving of the driving side rotating body. For this reason, at the start of the rotational drive of the drive-side rotator, the support member is blown in the rotation direction of the drive-side rotator by an impact when the drive-side rotator contacts the support member from the rotation direction of the drive-side rotator. It can suppress rotating ahead of a drive side rotary body. Therefore, after the drive side rotator comes into contact with the support member from the rotation direction of the drive side rotator, the drive side rotator and the support member tend to rotate integrally. Therefore, after the support member is pressed in the rotation direction of the driving side rotating body by the driving side rotating body, the holding of the rolling body by the clutch housing and the driven side rotating body is released, and the driven side rotating body is then Even if the rolling element is tried to be clamped again in the meantime, the clamping of the rolling element by the clutch housing and the driven rotary body is immediately released. As described above, the drive-side rotator can be prevented from being repeatedly separated from or abutted against the support member from the rotation direction of the drive-side rotator at the start of the rotational drive of the drive-side rotator. The generation of noise at the start of the rotational drive can be suppressed.

  In the clutch, the support member has at least one contact portion of a first contact portion that contacts the clutch housing and a second contact portion that contacts the drive-side rotating body, and the load generating portion is Preferably, at least one of the frictional force between the clutch housing and the first contact part and the frictional force between the drive side rotating body and the second contact part is increased. .

  According to this configuration, at least one of the frictional force between the first contact portion and the clutch housing and the frictional force between the second contact portion and the driving side rotating body is caused by the load generating portion. Is increased. This frictional force makes it difficult for the support member to rotate around the rotational axis of the drive side rotator. Therefore, it is possible to easily suppress the support member from rotating in the rotation direction of the driving side rotating body before the driving side rotating body at the start of the rotational driving of the driving side rotating body by the frictional force. As a result, it is possible to easily suppress the generation of noise at the start of the rotational drive of the drive side rotator.

  In the clutch, the load generating portion may be configured such that the first contact portion is pressed against the clutch housing, or the second contact portion is pressed against the drive side rotating body. It is preferable to generate a pressing force that presses the support member toward the rotating body.

  According to this configuration, the first contact portion is pressed against the clutch housing by the pressing force generated by the load generating portion, or the second contact portion is pressed against the drive side rotating body. The frictional force between the clutch housing and the second contact portion and the driving side rotating body is easily increased. The frictional force makes it difficult for the support member to rotate about the rotation axis of the drive side rotator. Accordingly, it is possible to more easily suppress the support member from rotating in the rotation direction of the drive side rotator prior to the drive side rotator at the start of the rotation drive of the drive side rotator. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational drive of the drive side rotator.

  In the clutch, the support member has a portion that overlaps at least one of the clutch housing and the driving-side rotator in the rotation axis direction of the support member, and the load generating portion extends in the rotation axis direction of the support member. It is preferable that the drive-side rotator be inclined with respect to the rotation direction of the drive-side rotator at the start of rotational drive of the drive-side rotator.

  According to this configuration, the inclined surface is inclined with respect to the rotation axis direction of the support member. For this reason, when the drive side rotator comes into contact with the inclined surface from the rotation direction at the start of the rotational drive of the drive side rotator, a component force in the rotation axis direction of the support member is generated from the pressing force by the drive side rotator on the inclined surface. Is done. By this component force, the support member is pressed toward the clutch housing or the driving side rotating body that overlaps in the rotation axis direction of the support member. Thereby, it is possible to further easily prevent the support member from rotating in the rotation direction of the driving side rotating body ahead of the driving side rotating body at the start of the rotation driving of the driving side rotating body. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational drive of the drive side rotator.

  In the clutch, the drive-side rotator is inclined with respect to the rotation axis direction of the drive-side rotator, and faces the inclined surface from the rotation direction of the drive-side rotator at the start of rotational drive of the drive-side rotator. It is preferable to have a drive-side inclined surface that makes contact or line contact.

  According to this configuration, at the start of the rotational drive of the drive side rotator, the drive side inclined surface of the drive side rotator comes into surface contact or line contact with the inclined surface from the rotation direction of the drive side rotator. Therefore, when the drive-side inclined surface comes into contact with the inclined surface, the component force in the rotation axis direction of the support member can be stably and easily generated from the pressing force by the drive-side rotating body. And by this component force, a support member is pressed toward the clutch housing or drive side rotary body which overlaps with the rotating shaft direction of a support member. Accordingly, it is possible to more effectively suppress the support member from rotating in the rotational direction of the drive side rotator prior to the drive side rotator at the start of the rotational drive of the drive side rotator. As a result, it is possible to more effectively suppress the generation of noise at the start of the rotational drive of the drive side rotator.

  In the clutch, the load generating portion may be a resistance protrusion that protrudes from an outer surface of the support member and increases an air resistance that acts on the support member when the support member rotates about the rotation axis of the drive side rotating body. preferable.

  According to this configuration, since the air resistance is increased by the resistance protrusion, it is difficult for the support member to rotate around the rotation axis of the drive side rotating body. Therefore, it is possible to easily suppress the support member from rotating in the rotation direction of the drive-side rotator prior to the drive-side rotator when the drive-side rotator starts to rotate. As a result, it is possible to easily suppress the generation of noise at the start of the rotational drive of the drive side rotator.

  In the clutch, the support member has a portion that overlaps at least one of the clutch housing and the driving-side rotating body in a rotation axis direction of the support member, and the resistance protrusion is axially formed from an outer surface of the support member. It is preferable to have a resistance inclined surface protruding and inclined with respect to the rotation axis direction of the support member.

  According to this configuration, the resistance protrusion that protrudes in the axial direction from the outer surface of the support member has a resistance inclined surface that is inclined with respect to the rotation axis direction of the support member (same as the rotation axis direction of the drive-side rotator). Therefore, when the support member rotates about the rotation axis of the drive side rotator, a component force in the direction of the rotation axis of the support member is generated from the pressing force due to the air resistance acting on the resistance inclined surface. By this component force, the support member is pressed toward the clutch housing or the driving side rotating body that overlaps in the rotation axis direction of the support member. Thereby, it can suppress more effectively that a support member rotates ahead of a drive side rotary body in the rotation direction of a drive side rotary body at the time of the start of the rotational drive of a drive side rotary body. As a result, it is possible to more effectively suppress the generation of noise at the start of the rotational drive of the drive side rotator.

  A motor that solves the above problems includes a motor unit having a rotary shaft that is rotationally driven, the clutch that has the drive-side rotary body that rotates integrally with the rotary shaft, and a driven shaft that rotates integrally with the driven-side rotary body. And an output unit for outputting the rotational driving force transmitted to the driven shaft.

  According to this configuration, since the motor includes the clutch in which the generation of noise at the start of the rotational drive of the driving side rotating body is suppressed, noise may be generated in the motor at the start of the rotational drive of the rotary shaft. It is suppressed.

  According to the clutch and the motor of the present invention, it is possible to suppress the generation of noise at the start of the rotational driving of the driving side rotating body.

Sectional drawing of the motor of 1st Embodiment. The partial expanded sectional view of the motor of a 1st embodiment. The disassembled perspective view of the clutch in 1st Embodiment. (A) is a side view of the support member holding the rolling element in the clutch of the first embodiment, and (b) is a bottom view of the support member. The side view of the drive side rotary body and support member in 1st Embodiment. The elements on larger scale of the drive side rotary body and support member in 1st Embodiment. (A) is sectional drawing (7a-7a sectional drawing in FIG. 2) of the clutch in 1st Embodiment, (b) is sectional drawing (7b-7b sectional drawing in FIG. 2) of the clutch. (A) And (b) is sectional drawing for demonstrating operation | movement of the clutch in 1st Embodiment. (A) And (b) is sectional drawing for demonstrating operation | movement of the clutch in 1st Embodiment. The side view of the support member and the drive side rotary body which hold | maintained the rolling element in 2nd Embodiment. Sectional drawing of the clutch except the driven side rotary body in 3rd Embodiment. The perspective view of the support member holding the rolling element in the clutch of 3rd Embodiment. (A) is a top view of the support member holding the rolling element in the clutch of 4th Embodiment, (b) is a side view of the support member. (A) And (b) is a schematic diagram which shows a part of clutch of 4th Embodiment. (A) is a top view of the support member holding the rolling element in the clutch of another form, (b) is a side view of the support member. (A) is a top view of the support member holding the rolling element in the clutch of another form, (b) is a side view of the support member.

<First Embodiment>
Hereinafter, a first embodiment of a motor provided with a clutch will be described.
A motor 10 according to this embodiment shown in FIG. 1 is provided in a power window device that lifts and lowers a window glass of a vehicle electrically. The motor 10 is configured by integrally assembling a motor unit 20 that generates rotational force and an output unit 30 that decelerates and outputs rotation output from the motor unit 20. In addition, the motor 10 includes a clutch 40 at a drive connection portion between the motor unit 20 and the output unit 30.

  The motor unit 20 of the present embodiment is a DC motor. A magnet 22 is fixed to an inner peripheral surface of a bottomed cylindrical yoke housing 21 (hereinafter referred to as a yoke 21) constituting the motor unit 20, and an armature 23 is disposed inside the magnet 22. . The armature 23 includes a rotating shaft 24 disposed at the center of the yoke 21. A base end portion (upper end portion in FIG. 1) of the rotating shaft 24 is supported by a bearing 25 provided at the center of the bottom of the yoke 21. A commutator 26 is fixed. Moreover, the front-end | tip part (lower edge part in FIG. 1) of the rotating shaft 24 is the connection part 24a which makes | forms the two-plane width shape chamfered in parallel from the column shape.

  A flange portion 21 a extending outward is formed in the opening portion of the yoke 21, and a brush holder 27 is fitted in the opening portion of the yoke 21. The brush holder 27 has a holder main body 27a having a shape for closing the opening of the yoke 21, and a connector part 27b protruding from the holder main body 27a to the outer side in the radial direction of the yoke 21 and connected to an external connector (not shown). The holder main body 27a holds a plurality of power supply brushes 28 that are electrically connected to the connector portion 27b by wires (not shown) and are in sliding contact with the commutator 26. The holder main body 27a holds a bearing 29 at a substantially central portion thereof, and the bearing 29 pivotally supports a portion of the rotating shaft 24 between the commutator 26 and the connecting portion 24a. When the external power supplied to the brush 28 via the connector portion 27b is supplied to the armature 23 via the commutator 26, the armature 23 (rotating shaft 24) is driven to rotate, that is, the motor portion 20 is It is designed to rotate.

  The output unit 30 is formed by housing a speed reduction mechanism 32 and the like in a resin gear housing 31. The gear housing 31 includes a fixing portion 31 a for fixing the gear housing 31 to the motor portion 20 at a portion (an upper end portion in FIG. 1) facing the motor portion 20 in the axial direction. The fixed portion 31 a has an outer shape similar to the outer shape of the flange portion 21 a of the yoke 21, and an accommodating recess 31 b that opens toward the inside of the yoke 21 is formed in the fixed portion 31 a. Then, in a state where a part of the holder main body 27a of the brush holder 27 is inserted into the housing recess 31b, the flange portion 21a that is in contact with the fixing portion 31a is fixed to the fixing portion 31a by the screw 33, whereby the gear The yoke 21 is fixed to the housing 31, and the motor unit 20 and the output unit 30 are integrated. The brush holder 27 is sandwiched between the yoke 21 and the fixed portion 31a.

  Further, the gear housing 31 is provided with a clutch housing recess 31c in the center of the bottom of the housing recess 31b in the axial direction, and extends from the center of the bottom of the clutch housing recess 31c along the direction of the central axis L1 of the rotary shaft 24. A worm shaft accommodating portion 31d is recessed. Further, the gear housing 31 is provided with a wheel housing portion 31e recessed on the side (right side in FIG. 1) of the worm shaft housing portion 31d. The wheel housing portion 31e and the worm shaft housing portion 31d are connected to each other at a substantially central portion in the axial direction (longitudinal direction) of the worm shaft housing portion 31d.

  A substantially cylindrical worm shaft 34 (driven shaft) is accommodated in the worm shaft accommodating portion 31d. The worm shaft 34 is made of a metal material, and a screw-like worm portion 34a is formed at a substantially central portion in the axial direction. The worm shaft 34 is supported at both ends in the axial direction by a pair of bearings 35 and 36 disposed at both ends in the axial direction of the worm shaft housing portion 31d. The worm shaft 34 disposed in the worm shaft housing portion 31d is supported by bearings 35 and 36 so as to be disposed coaxially with the rotary shaft 24, that is, the central axis L1 of the rotary shaft 24 and the worm shaft 34. The central axis line L2 is arranged on the same straight line.

  A disc-shaped worm wheel 37 that meshes with the worm portion 34a of the worm shaft 34 is rotatably accommodated in the wheel accommodating portion 31e. The worm wheel 37 and the worm shaft 34 constitute a speed reduction mechanism 32. That is, the speed reduction mechanism 32 of the present embodiment is a worm speed reduction mechanism (worm gear). In addition, an output shaft 38 that extends in the axial direction of the worm wheel 37 (in the direction perpendicular to the paper surface in FIG. 1) and rotates together with the worm wheel 37 is provided at the radial center of the worm wheel 37. A window glass of a vehicle is connected to the output shaft 38 via a window regulator (not shown).

Further, the clutch 40 that connects the rotating shaft 24 of the motor unit 20 and the worm shaft 34 of the output unit 30 is housed in the clutch housing recess 31c.
As shown in FIGS. 2 and 3, the clutch 40 includes a clutch housing 41, a driving side rotating body 42, a support member 43, a rolling element 44, and a driven side rotating body 45.

  The clutch housing 41 has a cylindrical shape, and a flange-like flange portion 41 a that extends radially outward is formed at one axial end portion of the clutch housing 41. The outer diameter of the cylindrical portion of the clutch housing 41 is formed substantially equal to the inner diameter of the clutch housing recess 31c, and the outer diameter of the flange portion 41a is formed larger than the inner diameter of the clutch housing recess 31c. In addition, fixed recesses 41b are formed in the flange portion 41a at four locations that are equiangularly spaced in the circumferential direction. Each fixed recess 41b penetrates the flange portion 41a in the axial direction and opens outward in the radial direction.

  As shown in FIG. 2, the clutch housing 41 is inserted into the clutch housing recess 31c until the flange portion 41a contacts the bottom surface of the housing recess 31b, and is fixed to the gear housing 31 at the flange portion 41a. . Specifically, on the outer surface of the opening of the clutch housing recess 31c on the bottom surface of the housing recess 31b, four fixed projections 31f projecting in the axial direction are formed at equiangular intervals in the circumferential direction. These four fixed protrusions 31f are inserted in the four fixed recesses 41b of the flange portion 41a in the axial direction, respectively, and the tip ends of the respective fixed protrusions 31f are processed by heat caulking. Thereby, the clutch housing 41 is fixed to the gear housing 31 so as not to move in the axial direction and to rotate in the circumferential direction. The clutch housing 41 fixed to the gear housing 31 is arranged coaxially with the rotary shaft 24 and the worm shaft 34.

  As shown in FIGS. 2 and 3, the drive-side rotator 42 has a substantially cylindrical shaft coupling portion 51. On the outer peripheral surface of the shaft connecting portion 51, a disc-shaped flange portion 52 that extends outward in the radial direction is integrally formed.

  In the shaft coupling portion 51, a drive shaft insertion hole 53 extending along the axial direction is formed at the axial center of the axial end portion (upper end portion in FIG. 2) on the motor portion 20 side. The drive shaft insertion hole 53 has a two-sided width shape corresponding to the outer shape of the connecting portion 24 a of the rotating shaft 24. Then, when the connecting portion 24 a is press-fitted into the drive shaft insertion hole 53, the drive side rotating body 42 is connected to the rotary shaft 24 so as to be integrally rotatable. The rotating shaft 24 and the drive-side rotating body 42 connected to the rotating shaft 24 are coaxial (that is, their center axes are located on the same straight line).

  Further, in the shaft coupling portion 51, a driven shaft insertion hole 54 extending along the axial direction is formed at the axial center of the axial end portion (lower end portion in FIG. 2) on the output portion 30 side. The center axis of the driven shaft insertion hole 54 coincides with the center axis of the drive shaft insertion hole 53. In this embodiment, the drive shaft insertion hole 53 and the driven shaft insertion hole 54 communicate with each other.

  As shown in FIG. 7B, the inner peripheral surface of the driven shaft insertion hole 54 has a pair of drive side transmission surfaces 54a that are parallel to each other in a planar shape parallel to the axial direction. The shape of the driven shaft insertion hole 54 viewed from the axial direction is a substantially track shape (two directions parallel to the drive-side transmission surface 54a and the short-side direction perpendicular to the drive-side transmission surface 54a). (Width shape). Each drive-side transmission surface 54a is provided with two first elastic members 55 made of an elastic material such as a rubber material. Moreover, the 2nd elastic member 56 which consists of materials which have elasticity, such as a rubber material, is each provided in the both ends of the longitudinal direction of the driven shaft insertion hole 54 seeing axially. The first and second elastic members 55 and 56 slightly protrude inward from the inner peripheral surface of the driven shaft insertion hole 54.

  Further, as shown in FIGS. 3 and 7A, the drive-side rotating body 42 is released from a pair of rolling elements extending from the flange portion 52 to the output portion 30 side (downward in FIG. 3) in the axial direction. Part 57. The rolling element releasing portions 57 are provided on both sides in the longitudinal direction of the driven shaft insertion hole 54 as viewed in the axial direction. Further, the two rolling element releasing portions 57 are provided at positions that are separated from each other by 180 ° in the rotation direction and opposed in the radial direction. In addition, the both ends of the circumferential direction in each rolling element cancellation | release part 57 are comprised by the elastic part 58 which consists of materials which have elasticity, such as a rubber material. Further, both ends in the circumferential direction of each rolling element release portion 57 extend linearly in parallel with the rotation axis of the drive side rotating body 42. Each of the rolling element release portions 57 is disposed inside the clutch housing 41.

  As shown in FIGS. 2 and 3, the support member 43 holds the rolling element 44 between the clutch housing 41 and the driven side rotating body 45 that face each other in the radial direction. The support member 43 of this embodiment is made of resin.

  The support member 43 includes a ring portion 61 that forms an annular shape centering on the central axis L <b> 2 of the worm shaft 34. The outer diameter of the ring portion 61 is larger than the inner diameter of the clutch housing 41. The ring portion 61 is disposed on the motor portion 20 side (the upper side in FIG. 2) with respect to the flange portion 41a of the clutch housing 41, and faces the flange portion 41a in the axial direction. The ring portion 61 is located between the flange portion 41a and the flange portion 52, and overlaps the flange portion 41a and the flange portion 52 in the axial direction.

  A ring-shaped protrusion along the circumferential direction of the ring portion 61 is formed on the lower surface of the ring portion 61 (an axial end surface facing the flange portion 41a), and a first contact portion that contacts the flange portion 41a from the axial direction. The lower protrusion 61a is provided. Further, a plurality of upper protrusions 61b as second abutting portions having a substantially hemispherical shape protruding in the axial direction are provided on the upper surface of the ring portion 61 (the end surface in the axial direction facing the flange portion 52). . In the present embodiment, the upper protrusions 61b are provided at four locations separated in the circumferential direction. Each upper protrusion 61b has an end abutted against the flange 52 from the output part 30 side in the axial direction.

  In addition, at two locations spaced apart in the circumferential direction on the inner peripheral side of the ring portion 61 (two locations at an interval of 180 ° in the present embodiment), rolling element holdings each holding a rolling element 44 having a columnar shape extending in the axial direction. A portion 62 is formed.

Here, the rolling element 44 held by the rolling element holder 62 will be described in detail.
As shown in FIGS. 4A and 4B, each rolling element 44 is made of resin, and its central axis L3 is parallel to the central axis L1 of the rotating shaft 24 and the central axis L2 of the worm shaft 34. It is arranged to make. As for each rolling element 44 of this embodiment, the shape seen from the axial direction has comprised the double-sided width shape. Therefore, each rolling element 44 has a shape having a longitudinal direction and a lateral direction when viewed from the axial direction. In the state shown in FIG. 4B, the radial direction of the clutch 40 is the longitudinal direction of the rolling element 44, and the circumferential direction of the clutch 40 is the short direction of the rolling element 44. Each rolling element 44 has first and second opposing surfaces 71a that are planar on both sides in the rotational direction X1 of the drive-side rotator 42 (the same as the circumferential direction of the clutch 40, hereinafter referred to as the rotational direction X1). , 71b. Furthermore, each rolling element 44 has first and second arcuate surfaces 72 a and 72 b on both sides in the radial direction of the clutch 40.

  In each rolling element 44, the first and second opposing surfaces 71a and 71b are parallel to the central axis L3 and parallel to each other. In each rolling element 44, the first and second arc surfaces 72a and 72b have an arc shape with the center axis L3 as the center of curvature when viewed from the axial direction. In the present embodiment, the first arc surface 72a and the second arc surface 72b have the same curvature, but may have different curvatures. The first and second arcuate surfaces 72a and 72b are formed in parallel to the central axis L3 without being inclined.

  As shown in FIG. 7A, in each rolling element 44, the first arcuate surface 72a located radially outward is opposed to the cylindrical inner peripheral surface 41c of the clutch housing 41 in the radial direction. It is possible to contact the peripheral surface 41c. On the other hand, in each rolling element 44, the second arcuate surface 72 b located on the radially inner side is opposed to the driven-side rotator 45 in the radial direction and can contact the driven-side rotator 45.

  As shown in FIGS. 3, 4 (a), and 4 (b), each of the rolling element holding portions 62 has an axial support portion 63 that extends radially inward from the ring portion 61. The axial support part 63 faces the rolling element 44 in the axial direction. Moreover, each rolling element holding | maintenance part 62 is opposite to the ring part 61 along the axial direction (center axis line L1, L2 direction) from the both ends of the circumferential direction of the axial direction support part 63 (downward in Fig.4 (a)). A pair of roller supports 64a and 64b. In each rolling element holding portion 62, paired roller supports 64a and 64b are positioned on both sides of the rolling element 44 in the rotation direction X1, and rotate the rolling element 44 so that the central axis L3 is parallel to the central axis L1. Holding from both sides in the direction X1. In addition, regarding the roller supports 64a and 64b forming a pair of the respective rolling element holding portions 62, the clutch 40 is viewed in the axial direction from the motor portion 20 side (that is, the state shown in FIG. The roller support positioned on the counterclockwise side is referred to as a first roller support 64a, and the roller support positioned on the clockwise side with respect to the rolling element 44 is referred to as a second roller support 64b.

  Further, the support member 43 has a connecting portion 66 that connects the tip end portion of the first roller support 64a of one rolling element holding portion 62 and the tip end portion of the second roller support 64b of the other rolling element holding portion 62 to each other. . The connecting portion 66 has an arc shape centered on the central axes L1 and L2 when viewed in the axial direction. Further, a holding claw 67 protruding between the paired first and second roller supports 64a and 64b is provided at the tip of each roller support 64a and 64b. Each holding claw 67 abuts against one end surface of the rolling element 44 in the axial direction from the axial direction, and prevents the rolling element 44 from falling off from the rolling element holding part 62 in the axial direction.

  Further, as shown in FIGS. 4A and 4B, the roller supports 64a and 64b forming a pair in each rolling element holding portion 62 have first and second side surfaces facing each other in the rotational direction X1. Rolling contact surfaces 68a and 68b. The first rolling element contact surface 68a of the first roller support 64a has a planar shape parallel to the central axes L1 and L2, and the rolling elements 44 disposed between the pair of roller supports 64a and 64b. It faces the first facing surface 71a. Further, the second rolling element contact surface 68b provided on the second roller support 64b has a planar shape that is parallel to the central axes L1 and L2, similarly to the first rolling element contact surface 68a. It faces the second facing surface 71b of the rolling element 44 disposed between the pair of roller supports 64a, 64b. The first and second rolling element contact surfaces 68a and 68b facing the rotation direction X1 are parallel to each other.

  As shown in FIG. 4B, the distance between the first and second rolling element contact surfaces 68a, 68b facing each other in each rolling element holding portion 62 is the maximum outer diameter (that is, each rolling element 44). The width in the longitudinal direction of the rolling element 44 as viewed in the axial direction is shorter. Further, the distance between the first and second rolling element contact surfaces 68a and 68b facing each other in each rolling element holding portion 62 is the width of each rolling element 44 in the rotational direction X1 (the first opposing surface 71a and The length between the second facing surface 71b and slightly longer than the width in the short direction of the rolling element 44 when viewed in the axial direction.

  Further, as shown in FIG. 4A, in each rolling element holding portion 62, the paired roller supports 64a and 64b are opposite to the first and second rolling element contact surfaces 68a and 68b facing each other. The first and second inclined surfaces 69a and 69b are provided on the side surfaces in the circumferential direction. The first inclined surface 69a provided on the first roller support 64a is provided in the first roller support 64a between a position slightly closer to the tip than the base end of the first roller support 64a and the connecting portion 66. It has been. The first inclined surface 69a is a planar shape inclined with respect to the rotation axis L4 direction of the support member 43 (same as the rotation axis direction of the drive-side rotator 42 and the same in the central axis L1 direction in the present embodiment). I am doing. That is, the first inclined surface 69a is formed so as not to be parallel to the direction of the rotation axis L4 and to be perpendicular to the direction of the rotation axis L4. Specifically, the first inclined surface 69a is inclined so as to be separated from the first rolling element contact surface 68a from the proximal end side to the distal end side of the first roller support 64a. Therefore, the width of the first roller support 64a in the circumferential direction (the rotation direction of the support member 43 around the rotation axis of the drive-side rotator 42) gradually increases from the proximal end side toward the distal end side.

  The second inclined surface 69b has the same shape as the first inclined surface 69a. In other words, the second inclined surface 69b provided on the second roller support 64b extends between the connecting portion 66 and a position slightly closer to the front end than the base end of the second roller support 64b in the second roller support 64b. Is provided. The second inclined surface 69b is a planar shape inclined with respect to the rotation axis L4 direction of the support member 43 (same as the rotation axis direction of the drive-side rotator 42 and the same in the central axis L1 direction in the present embodiment). I am doing. And the 2nd inclined surface 69b inclines so that it may space apart from the 2nd rolling-element contact surface 68b as it goes to the front end side from the base end side of the 2nd roller support 64b. Therefore, the circumferential width of the second roller support 64b gradually increases from the proximal end side toward the distal end side.

Incidentally, the 1st inclined surface 69a and the 2nd inclined surface 69b incline about 10 degrees with respect to the rotating shaft L4 direction of the support member 43, for example.
As shown in FIGS. 2 and 7 (a), the two rolling elements 44 are held at equal angular intervals (180 ° intervals in the present embodiment) in the rotation direction X1 by being held by the support member 43 having the above-described configuration. Has been placed. Further, since the roller supports 64 a and 64 b holding the rolling elements 44 are inserted and arranged inside the clutch housing 41, each rolling element 44 is radially connected to the clutch housing 41 inside the clutch housing 41. Opposite to. The support member 43 can rotate relative to the clutch housing 41 in the rotation direction X1.

  Further, each rolling element release portion 57 of the drive side rotating body 42 is inserted inside the clutch housing 41 through the inner peripheral side of the ring portion 61 of the support member 43. Furthermore, each rolling element release part 57 is arrange | positioned between the two rolling element holding parts 62, respectively, and adjoins each rolling element holding part 62 in the circumferential direction. Therefore, both end portions (respective elastic portions 58) in the rotation direction X1 of each rolling element release portion 57 are the first roller support 64a of one rolling element holding portion 62 and the second roller support 64b of the other rolling element holding portion 62. And the rotation direction X1. Specifically, one end of each rolling element releasing portion 57 in the rotational direction X1 faces the first inclined surface 69a of the first roller support 64a of one rolling element holding portion 62 in the rotational direction X1, The other end of the rolling element releasing portion 57 in the rotational direction X1 faces the second inclined surface 69b of the second roller support 64b of the other rolling element holding portion 62 in the rotational direction X1. The support member 43 and the drive-side rotator 42 can be rotated relative to each other in the rotation direction X1. When the drive-side rotator 42 rotates, each rolling element release portion 57 is located on the front side in the rotation direction. The first inclined surface 69a of the roller support 64a or the second inclined surface 69b of the second roller support 64b is brought into contact with the rotation side of the drive side rotating body 42.

  As shown in FIGS. 2 and 3, the driven-side rotator 45 is formed integrally with the base end portion (the upper end portion in FIG. 2) of the worm shaft 34, and is made of metal. The driven-side rotating body 45 includes a control unit 81 and a driven-side connecting unit 82 that are arranged in parallel in the axial direction. The driven side connecting portion 82 is provided on the base end side (the upper side in FIG. 2) of the control portion 81.

  The control unit 81 is formed integrally with the worm shaft 34 and has a column shape extending in the axial direction of the worm shaft 34. The central axis of the control unit 81 is coincident with the central axis L2 of the worm shaft 34, and is formed coaxially with the worm shaft 34. Further, as shown in FIG. 7A, when viewed from the direction of the central axis L2, the control unit 81 has a point-symmetric shape with the central axis L2 of the worm shaft 34 as the center of symmetry.

  A pair of control surfaces 83 are formed on the outer peripheral surface of the control unit 81. Each control surface 83 is formed at two locations that are equiangularly spaced in the circumferential direction (180 ° intervals in the present embodiment) on the outer peripheral surface of the control unit 81. Each control surface 83 has a planar shape that is parallel to the axial direction and orthogonal to the radial direction of the driven-side rotator 45. Further, the pair of control surfaces 83 are parallel to each other, and the axial length of each control surface 83 is longer than the axial length of the rolling element 44.

  As shown in FIGS. 2 and 7B, the driven side connecting portion 82 has a column shape extending in the axial direction of the worm shaft 34. The center axis of the driven side connecting portion 82 coincides with the center axis L2 of the worm shaft 34, and is formed coaxially with the worm shaft 34. The driven side connecting portion 82 is formed to be slightly thinner than the driven shaft insertion hole 54. The driven side connecting portion 82 has a substantially elliptical cross-sectional shape orthogonal to the axial direction, and the cross-sectional shape is constant in the axial direction. In addition, when viewed in the axial direction, the longitudinal direction of the driven side connecting portion 82 is a direction parallel to the control surface 83, and the short direction of the driven side connecting portion 82 is a direction orthogonal to the control surface 83. (See also FIG. 7 (a)). As shown in FIG. 7B, when viewed from the direction of the central axis L2, the driven side connecting portion 82 has a point-symmetric shape with the central axis L2 of the worm shaft 34 as the center of symmetry.

  A pair of first driven side transmission surfaces 84 and a pair of second driven side transmission surfaces 85 are formed on the outer peripheral surface of the driven side coupling portion 82. Of the two first driven side transmission surfaces 84 forming a pair, one first driven side transmission surface 84 is formed 180 ° opposite to the other first driven side transmission surface 84. The two first driven side transmission surfaces 84 are each parallel to the axial direction and are parallel to each other. Further, the distance between the two first driven side transmission surfaces 84 is formed to be equal to the distance between the pair of drive side transmission surfaces 54 a provided in the driven shaft insertion hole 54 of the driving side rotating body 42.

  The second driven side transmission surface 85 is formed between the two first driven side transmission surfaces 84, and one second driven side transmission surface 85 is in relation to the other second driven side transmission surface 85. It is formed on the opposite side of 180 °. The two second driven side transmission surfaces 85 each have a planar shape parallel to the axial direction and are parallel to each other. The distance between the two second driven side transmission surfaces 85 is formed to be equal to the distance between the pair of drive side transmission surfaces 54 a provided in the driven shaft insertion hole 54 of the driving side rotating body 42. The first driven side transmission surface 84 and the second driven side transmission surface 85 are formed in the axial direction from one end to the other end of the driven side coupling portion 82 in the axial direction.

  As shown in FIG. 2, the driven side rotating body 45 as described above is inserted into the clutch housing 41 and the support member 43 from the side opposite to the driving side rotating body 42. The driven-side rotator 45 is disposed coaxially with the clutch housing 41, the drive-side rotator 42 and the support member 43.

  Further, as shown in FIG. 7B, the driven side connecting portion 82 is loosely fitted in the driven shaft insertion hole 54 that can rotate integrally with the driving side rotating body 42. The first and second elastic members 55 and 56 are interposed between the outer peripheral surface of the driven side connecting portion 82 loosely fitted in the driven shaft insertion hole 54 and the inner peripheral surface of the driven shaft insertion hole 54. Specifically, the pair of second elastic members 56 are in contact with both ends in the longitudinal direction of the driven side connecting portion 82 when viewed in the axial direction. The four first elastic members 55 are respectively interposed between the two first driven side transmission surfaces 84 and the two second driven side transmission surfaces 85 and the drive side transmission surface 54a.

  When the driving side rotating body 42 rotates around the central axis with respect to the driven side rotating body 45, the driving side transmission surface 54a elastically deforms the first elastic member 55 and the first and second driven side transmission surfaces. It abuts on either one of 84 and 85 in the rotational direction. As a result, the drive-side rotator 42 and the driven-side rotator 45 are engaged in the rotation direction, and the rotational driving force of the drive-side rotator 42 is transmitted to the driven-side rotator 45.

  Further, as shown in FIG. 7A, the control unit 81 of the driven side rotator 45 is arranged such that the rolling elements 44 are interposed between the control surfaces 83 and the inner peripheral surface 41 c of the clutch housing 41. It is inserted inside the support member 43 and faces the clutch housing 41 and the rolling elements 44 in the radial direction. That is, the support member 43 holds the rolling element 44 between the inner peripheral surface 41 c of the clutch housing 41 and each control surface 83 of the driven side rotating body 45.

  The distance between each control surface 83 and the inner peripheral surface 41 c of the clutch housing 41 (interval in the direction orthogonal to the control surface 83) changes in the rotation direction of the driven-side rotator 45. In the present embodiment, the distance between the control surface 83 and the inner peripheral surface 41c of the clutch housing 41 is the longest at the center in the circumferential direction of each control surface 83, and from the center in the circumferential direction of each control surface 83 to the circumferential direction. It gradually shortens as it goes to both ends. Further, the distance between the center in the circumferential direction of each control surface 83 and the inner peripheral surface 41c of the clutch housing 41 is longer than the maximum outer diameter of the rolling element 44 and the circumferential end of each control surface 83. The distance from the inner peripheral surface 41 c of the clutch housing 41 is shorter than the maximum outer diameter of the rolling element 44.

Next, the operation of the motor 10 configured as described above will be described together with its operation, focusing on the operation of the clutch 40.
As shown in FIG. 2 and FIG. 8A, when the motor unit 20 is driven by energizing the motor unit 20, the driving side rotating body 42 rotates together with the rotating shaft 24. That is, the rotational drive of the drive side rotator 42 is started. 8A and 8B illustrate a case where the drive side rotating body 42 is rotationally driven in the first direction R1. And as shown to Fig.8 (a), with the rotation of 1st direction R1 of the drive side rotary body 42, the circumferential direction of the rotation direction front side in each rolling element cancellation | release part 57 of the drive side rotary body 42 The end portion (elastic portion 58) contacts the first inclined surface 69a of the first roller support 64a of each rolling element holding portion 62 in the rotational direction.

  Here, as shown in FIGS. 5 and 6, the circumferential end of each rolling element release portion 57 extends in parallel with the rotation axis of the drive side rotating body 42, while each first inclined surface 69 a The support member 43 is inclined with respect to the rotation axis L4 direction (same as the rotation axis direction of the drive side rotating body 42). Therefore, when the rolling element release portion 57 comes into contact with the first inclined surface 69a in the rotation direction of the driving side rotating body 42 at the start of the rotational driving of the driving side rotating body 42, the driving side rotating body on the first inclined surface 69a. The component force F1a (see FIG. 6) in the direction of the rotation axis L4 of the support member 43 is generated from the pressing force F by 42. By this component force F1a, the support member 43 is pressed toward the clutch housing 41 overlapping in the direction of the rotation axis L4. Therefore, since the lower protrusion 61a of the ring portion 61 is pressed against the flange 41a of the clutch housing 41 in the axial direction, the frictional force between the lower protrusion 61a and the flange 41a is increased. That is, the 1st inclined surface 69a acts so that the frictional force between the lower side protrusion part 61a and the flange part 41a may be increased. And it becomes difficult for the support member 43 to rotate around the rotational axis of the drive-side rotator 42 due to the frictional force between the lower protrusion 61a and the flange 41a. Therefore, at the start of the rotational driving of the driving side rotating body 42, the support member 43 is driven by the impact when the rolling element releasing portion 57 contacts the first roller support 64a from the rotation direction of the driving side rotating body 42. It is suppressed that it is skipped in the rotational direction 42 (the first direction R1 in the example shown in FIG. 7) and rotates ahead of the drive-side rotator 42. Therefore, after the rolling element releasing portion 57 contacts the first roller support 64a from the rotation direction of the driving side rotating body 42, the driving side rotating body 42 and the support member 43 are likely to rotate integrally. Then, each rolling element release portion 57 that is in contact with the first roller support 64a of each rolling element holding portion 62 in the rotational direction is moved through each first roller support 64a by a component force F1b in the circumferential direction of the pressing force F. By pressing the rolling elements 44 in the first direction R1, the holding of each rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the control surface 83 of the driven side rotating body 45 is released.

  Further, as shown in FIG. 8B, in the driving side rotating body 42, each driving side transmission surface 54 a comes into contact with each second driven side transmission surface 85 of the driven side coupling portion 82 from the first direction R <b> 1. Thus, the driven side rotating body 45 is connected so as to be integrally rotatable.

  The support member 43 is pressed in the rotation direction of the drive-side rotator 42 by the drive-side rotator 42, thereby releasing the rolling element 44 from being held by the inner peripheral surface 41 c of the clutch housing 41 and the driven-side rotator 45. After that, the driven rotating body 45 may try to sandwich the rolling element 44 again between the inner peripheral surface 41c of the clutch housing 41 (see FIG. 8A). However, in the present embodiment, the support-side rotating body 42 and the support member 43 are easily rotated integrally by suppressing the support member 43 from rotating before the driving-side rotating body 42. . Therefore, when the driving side rotating body 42 and the support member 43 rotate integrally, the holding of the rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the driven side rotating body 45 is immediately released.

  And while each rolling element release part 57 presses the 1st roller support 64a and rolling element 44 to the 1st direction R1, while the drive side rotating body 42 and the support member 43 rotate integrally, each rolling element 44 is arranged at the center in the circumferential direction of each control surface 83. That is, the rolling element 44 is not clamped between the control surface 83 and the clutch housing 41 (that is, does not hinder the rotation of the driven side rotating body 45), and is unlocked. In this unlocked state, the rotational driving force of the driving side rotating body 42 (rotating shaft 24) is transmitted to the driven side rotating body 45 (worm shaft 34), and the rotating shaft 24 and the worm shaft 34 are moved in the first direction R1. The rotation of the worm shaft 34 in the first direction R <b> 1 is transmitted to the output shaft 38 while being decelerated between the worm wheel 37 and output from the output shaft 38. Then, the window glass of the vehicle is raised and lowered via a window regulator (not shown) according to the rotation direction of the output shaft 38. When the energization of the motor unit 20 is stopped, the rotational drive of the rotary shaft 24, that is, the rotational drive of the drive side rotating body 42 is stopped.

  Incidentally, when the drive-side rotator 42 is rotated in the second direction R2 by driving the motor unit 20, the rotation direction of each member of the clutch 40 is opposite, but the drive-side rotator 42 described above. The rotating shaft 24 and the worm shaft 34 are coupled by the same operation as when the motor is rotated in the first direction R1.

  As shown in FIGS. 9A and 9B, when the driving of the motor unit 20 is stopped, that is, when the rotating shaft 24 (driving side rotating body 42) is not rotated, the load side (this embodiment) is used. Then, when a load is applied to the output shaft 38 from the side of the window regulator), the driven side rotating body 45 tends to rotate due to the load. 9A and 9B show a case where the driven-side rotator 45 attempts to rotate in the second direction R2. Then, each control surface 83 of the driven side rotating body 45 presses the rolling element 44 disposed between each control surface 83 and the inner peripheral surface 41 c of the clutch housing 41 to the outer peripheral side. The rolling element 44 pushed by the control surface 83 has the first arc surface 72a abutting against the inner peripheral surface 41c of the clutch housing 41 between the pair of roller supports 64a and 64b. The second arcuate surface 72b comes into contact with a portion closer to the end in the circumferential direction (the end on the rear side in the second direction R2 in the control surface 83) than the center in the circumferential direction of 83. Each rolling element 44 is sandwiched between a portion of the control surface 83 near the rear end in the second direction R <b> 2 and the inner peripheral surface 41 c of the clutch housing 41. Thereby, the rolling element 44 becomes a wedge, and the rotation (rotation in the second direction R2) of the driven side rotating body 45 is blocked (that is, the rotation of the worm shaft 34 is locked). Therefore, the output shaft 38 is prevented from rotating when the rotary shaft 24 (drive-side rotator 42) is not rotated. In the state (the state shown in FIG. 9A) in which the driven side rotating body 45 is disposed at the locked position (the position where the rolling element 44 is sandwiched between the driven housing 45 and the clutch housing 41), the state shown in FIG. As described above, each second driven side transmission surface 85 of the driven side connecting portion 82 does not come into contact with each driving side transmission surface 54a of the driving side rotating body 42 in the rotational direction (second direction R2).

  Incidentally, even when the driven-side rotating body 45 tries to rotate in the first direction R1 when the motor unit 20 (driving-side rotating body 42) is not driven, the rotation of the driven-side rotating body 45 is similarly prevented. The That is, each rolling element 44 is sandwiched between a portion of the control surface 83 near the rear end in the first direction R1 and the inner peripheral surface 41c of the clutch housing 41, whereby each rolling element 44 is As a wedge, rotation of the driven-side rotator 45 (rotation in the first direction R1) is blocked (that is, rotation of the worm shaft 34 is locked).

Next, the effect of this embodiment will be described.
(1) Since it is possible to suppress the drive-side rotator 42 from being repeatedly separated from or coming into contact with the support member 43 from the rotation direction of the drive-side rotator 42 when the drive-side rotator 42 starts to rotate, Generation of noise at the start of rotational driving of the side rotating body 42 can be suppressed. Since the motor 10 includes the clutch 40 in which the generation of noise at the start of the rotational drive of the drive-side rotator 42 is suppressed, noise is generated in the motor 10 at the start of the rotational drive of the rotary shaft 24. Is suppressed.

  (2) The support member 43 has a lower protrusion 61 a that contacts the flange portion 41 a of the clutch housing 41. The first and second inclined surfaces 69a and 69b act so as to increase the frictional force between the lower protrusion 61a and the flange portion 41a at the start of the rotational drive of the drive side rotating body 42. As described above, the friction force between the lower protrusion 61a and the flange portion 41a is increased by the first and second inclined surfaces 69a and 69b, so that the support member 43 is driven by the friction force. It becomes difficult to rotate around the rotation axis of 42. Accordingly, it is possible to easily suppress the support member 43 from rotating in the rotational direction of the drive side rotating body 42 ahead of the drive side rotating body 42 at the start of the rotational drive of the drive side rotating body 42 by the frictional force. it can. As a result, it is possible to easily suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

  (3) The first and second inclined surfaces 69a and 69b have a pressing force (that is, a component force F1a) that presses the support member 43 toward the clutch housing 41 so that the lower protrusion 61a is pressed against the flange 41a. Is generated. Therefore, the lower projecting portion 61a is pressed against the flange portion 41a by the component force F1a generated by the first and second inclined surfaces 69a and 69b, so that the frictional force between the lower projecting portion 61a and the flange portion 41a is obtained. Is easily increased. The frictional force makes it difficult for the support member 43 to rotate around the rotational axis of the drive-side rotator 42. Therefore, it is possible to more easily suppress the support member 43 from rotating in the rotation direction of the drive side rotating body 42 before the drive side rotating body 42 at the start of the rotational drive of the drive side rotating body 42. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

  (4) The support member 43 has a portion overlapping the clutch housing 41 in the direction of the rotation axis L4 of the support member 43. In addition, the first and second inclined surfaces 69 a and 69 b of the support member 43 are inclined with respect to the direction of the rotation axis L <b> 4 of the support member 43. Therefore, when the drive-side rotator 42 comes into contact with the first inclined surface 69a or the second inclined surface 69b from the rotation direction at the start of the rotational drive of the drive-side rotator 42, the drive-side rotator 42 causes the inclined surface to contact the first inclined surface 69a. A component force F1a in the direction of the rotation axis L4 is generated from the pressing force F. With this component force F1a, the support member 43 is pressed toward the clutch housing 41 that overlaps in the direction of the rotation axis L4 of the support member 43. Thereby, it is possible to further easily prevent the support member 43 from rotating in the rotation direction of the driving side rotating body 42 ahead of the driving side rotating body 42 at the start of the rotational driving of the driving side rotating body 42. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational drive of the drive side rotator 42.

Second Embodiment
Hereinafter, a second embodiment of a motor provided with a clutch will be described. In the present embodiment, the same reference numerals are given to the same configurations as the configurations of the first embodiment and the corresponding configurations, and the description thereof is omitted.

  As shown in FIG. 10, the clutch 100 of the present embodiment is provided in the motor 10 in place of the clutch 40 of the first embodiment. The clutch 100 includes the drive-side rotator 110 instead of the drive-side rotator 42 in the clutch 40 of the first embodiment, and the support member 120 instead of the support member 43.

  The support member 120 includes the first and second inclined surfaces 121a and 121b in place of the first and second inclined surfaces 69a and 69b in the support member 43 of the first embodiment. .

  In each rolling element holding portion 62, the first inclined surface 121a provided on the first roller support 64a side is a side surface on one side (right side in FIG. 10) in the circumferential direction of the axial support portion 63, and the first roller. The support 64 a is provided across the circumferential side surface opposite to the rolling element 44. In each rolling element holding part 62, the first inclined surface 121a extends from the axial base end of the axial support part 63 to the front side of the connecting part 66 on the distal end side of the first roller support 64a. Is provided. The first inclined surface 121a is inclined with respect to the rotation axis L6 direction of the support member 120 (same as the rotation axis L5 direction of the drive side rotating body 110 and the same in the central axis L1 direction in the present embodiment). It has a flat shape. That is, the first inclined surface 121a is formed so as not to be parallel to the direction of the rotation axis L6 and to be perpendicular to the direction of the rotation axis L6. Specifically, the first inclined surface 121a is inclined so as to approach the first rolling element contact surface 68a from the axial base end of the axial support portion 63 toward the distal end side of the first roller support 64a. Yes. Therefore, the width of the first roller support 64a in the circumferential direction (the rotation direction of the support member 120 around the rotation axis L5 of the driving side rotating body 110) is gradually narrowed from the proximal end side toward the distal end side.

  The second inclined surface 121b has the same shape as the first inclined surface 121a. That is, in each rolling element holding portion 62, the second inclined surface 121b provided on the second roller support 64b side is a side surface on one side (left side in FIG. 10) in the circumferential direction of the axial support portion 63, and the second The two-roller support 64b is provided across the circumferential side surface opposite to the rolling element 44. In each rolling element holding portion 62, the second inclined surface 121b extends from the axial base end of the axial support portion 63 to the front side of the connecting portion 66 on the distal end side of the second roller support 64b. Is provided. Further, the second inclined surface 121b has a planar shape inclined with respect to the direction of the rotation axis L6 of the support member 120. Specifically, the second inclined surface 121b is inclined so as to approach the second rolling element contact surface 68b from the proximal end in the axial direction of the axial support portion 63 toward the distal end side of the second roller support 64b. Yes. Therefore, the circumferential width of the second roller support 64b gradually decreases from the base end side toward the tip end side, and the rolling element holding portion 62 extends in the circumferential direction from the base end in the axial direction toward the tip end side. The width of is gradually narrowing.

The drive-side rotator 110 is configured such that, in the drive-side rotator 42 of the first embodiment, each rolling element release portion 57 includes first and second drive-side inclined surfaces 111a and 111b.
The first drive-side inclined surface 111a includes a first inclined surface 121a provided on one of the two rolling-element holding portions 62 and the driving-side rotating body in the rolling-element releasing portion 57. 110 is provided on a side surface facing the rotation direction of 110. The first drive-side inclined surface 111 a is provided from the proximal end to the distal end of the rolling element releasing portion 57. The first drive-side inclined surface 111a is inclined with respect to the direction of the rotation axis L5 of the drive-side rotator 110. That is, the first drive-side inclined surface 111a is formed so as not to be parallel to the direction of the rotation axis L5 and to be perpendicular to the direction of the rotation axis L5. Specifically, when a straight line that passes through the center in the circumferential direction of the rolling element releasing portion 57 and extends in the direction of the rotation axis L5 is the center line of the rolling element releasing portion 57, the first drive-side inclined surface 111a Inclining away from the center line of the rolling element releasing portion 57 in the circumferential direction from the proximal end to the distal end. Therefore, one end portion in the circumferential direction of the rolling element releasing portion 57 has a shape that gradually protrudes in the circumferential direction (the rotating direction of the driving side rotating body 110) from the base end to the distal end of the rolling element releasing portion 57. . The first drive-side inclined surface 111 a can make surface contact with the first inclined surface 121 a facing the rotation direction of the drive-side rotator 110 from the rotation direction of the drive-side rotator 110.

  The second drive side inclined surface 111b has the same shape as the first drive side inclined surface 111a. In other words, the second driving side inclined surface 111b is connected to the second inclined surface 121b provided on one of the two rolling element holding portions 62 in the rolling element releasing portion 57 and the driving side. The rotating body 110 is provided on a side surface facing the rotation direction. Further, the second drive side inclined surface 111 b is provided from the proximal end to the distal end of the rolling element releasing portion 57. The second drive side inclined surface 111b is inclined with respect to the direction of the rotation axis L5 of the drive side rotating body 110. Specifically, the second drive-side inclined surface 111 b is inclined so as to move away from the center line of the rolling element releasing portion 57 in the circumferential direction from the base end to the distal end of the rolling element releasing portion 57. Therefore, the other end portion in the circumferential direction of the rolling element releasing portion 57 has a shape that gradually protrudes in the circumferential direction (the rotation direction of the driving side rotating body 110) from the base end to the distal end of the rolling element releasing portion 57. The rolling element releasing portion 57 has a shape in which the width in the circumferential direction gradually increases from the proximal end toward the distal end. The second drive-side inclined surface 111 b can come into surface contact with the second inclined surface 121 b facing the rotation direction of the drive-side rotating body 110 from the rotation direction of the drive-side rotating body 110.

Next, the operation of this embodiment will be described.
When the rotation drive of the rotary shaft 24 is started by driving the motor unit 20, the drive side rotating body 110 that rotates integrally with the rotary shaft 24 is started to rotate. Along with the rotation of the drive-side rotator 110, the circumferential end on the front side in the rotation direction of each rolling-element releasing portion 57 of the drive-side rotator 110 abuts on each rolling-element holding portion 62 in the rotation direction (see FIG. 8 (a)). That is, according to the rotation direction of the driving side rotating body 110, the first driving side inclined surface 111a is in surface contact with the first inclined surface 121a, or the second driving side inclined surface 111b is changed to the second inclined surface 121b. Surface contact.

  Here, in FIG. 10, the driving-side rotating body 110 rotates in the first direction R <b> 1, and the first driving-side inclined surface 111 a is in surface contact with the first inclined surface 121 a from the rotating direction of the driving-side rotating body 110. The case is shown. The first inclined surface 121a and the first drive-side inclined surface 111a are both inclined in the same direction with respect to the rotation axis L5 direction of the drive-side rotator 110 (same as the rotation axis L6 direction of the support member 120). Yes. Therefore, when the first driving side inclined surface 111a comes into contact with the first inclined surface 121a from the rotation direction of the driving side rotating body 110 at the start of the rotational driving of the driving side rotating body 110, the first inclined surface 121a is driven. A component force F2a in the direction of the rotation axis L6 of the support member 120 is generated from the pressing force F by the side rotating body 110. By this component force F2a, the support member 120 is pressed toward the drive side rotating body 110 that overlaps in the direction of the rotation axis L6 of the support member 120. Accordingly, since the upper protrusion 61b of the ring portion 61 is pressed against the flange 52 in the axial direction, the frictional force between the upper protrusion 61b and the flange 52 is increased. That is, the first inclined surface 121a acts to increase the frictional force between the upper protrusion 61b and the flange 52. And it becomes difficult for the support member 120 to rotate around the rotation axis of the drive side rotating body 110 due to the frictional force between the upper protrusion 61 b and the flange 52. For this reason, at the start of the rotational driving of the driving side rotating body 110, the support member 120 is driven by the impact when the rolling element releasing portion 57 contacts the rolling element holding portion 62 from the rotation direction of the driving side rotating body 110. It is suppressed that it is skipped in the rotation direction of 110 and rotates ahead of the driving side rotating body 110. Therefore, after the rolling element releasing portion 57 contacts the rolling element holding portion 62 from the rotation direction of the driving side rotating body 110, the driving side rotating body 110 and the support member 120 are likely to rotate integrally. Then, each rolling element release part 57 that is in contact with each rolling element holding part 62 in the rotational direction rotates the rolling element 44 via the respective rolling element holding parts 62 by driving side by the circumferential force F2b of the pressing force F. By pressing in the rotation direction of the body 110, the holding of each rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the control surface 83 of the driven side rotating body 45 is released.

  In addition, when the support member 120 is pressed in the rotation direction of the driving side rotating body 110 by the driving side rotating body 110, the holding of the rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the driven side rotating body 45 is released. After that, the driven-side rotating body 45 may try to sandwich the rolling element 44 again between the inner peripheral surface 41 c of the clutch housing 41. However, in the present embodiment, the drive member rotator 110 and the support member 120 are easily rotated integrally by suppressing the support member 120 from rotating before the drive rotator 110. . Therefore, when the driving side rotating body 110 and the support member 120 rotate integrally, the holding of the rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the driven side rotating body 45 is immediately released.

  The same effect can be obtained when the second driving side inclined surface 111b comes into surface contact with the second inclined surface 121b from the rotation direction of the driving side rotating body 110 when the driving side rotating body 110 starts to rotate.

According to the present embodiment, in addition to the same effects as (1) of the first embodiment, the following effects can be achieved.
(1) The support member 120 has an upper protrusion 61b that comes into contact with the flange 52 of the drive-side rotator 110. The first and second inclined surfaces 121a and 121b act so as to increase the frictional force between the upper protrusion 61b and the flange 52 at the start of the rotational drive of the drive-side rotator 110. As described above, the frictional force between the upper protrusion 61b and the flange 52 is increased by the first and second inclined surfaces 121a and 121b, whereby the support member 120 is driven by the frictional force. It becomes difficult to rotate around the rotation axis. Accordingly, it is possible to easily suppress the support member 120 from rotating in the rotational direction of the driving side rotating body 110 prior to the driving side rotating body 110 at the start of the rotational driving of the driving side rotating body 110 by the frictional force. it can. As a result, it is possible to easily suppress the generation of noise at the start of the rotational drive of the drive-side rotator 110.

  (2) The first and second inclined surfaces 121a and 121b have a pressing force (that is, a component force F2a) that presses the support member 120 toward the drive-side rotator 110 so that the upper protrusion 61b is pressed against the flange 52. ). Accordingly, the upper projecting portion 61b is pressed against the flange portion 52 by the component force F2a generated by the first and second inclined surfaces 121a and 121b, thereby facilitating the frictional force between the upper projecting portion 61b and the flange portion 52. Will be increased. The frictional force makes it difficult for the support member 120 to rotate around the rotation axis L5 of the drive-side rotator 110. Therefore, it is possible to more easily prevent the support member 120 from rotating in the rotational direction of the drive side rotating body 110 prior to the drive side rotating body 110 at the start of the rotational drive of the drive side rotating body 110. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational drive of the drive side rotator 110.

  (3) The support member 120 has a portion that overlaps the drive-side rotator 110 in the direction of the rotation axis L6 of the support member 120. Further, the first and second inclined surfaces 121a and 121b of the support member 120 are inclined with respect to the direction of the rotation axis L6 of the support member 120. Therefore, when the drive-side rotator 110 abuts on the first inclined surface 121a or the second inclined surface 121b from the rotation direction at the start of the rotational drive of the drive-side rotator 110, the drive-side rotator 110 in the inclined surface A component force F2a in the direction of the rotation axis L6 of the support member 120 is generated from the pressing force F. By this component force F2a, the support member 120 is pressed toward the drive side rotating body 110 that overlaps in the direction of the rotation axis L6 of the support member 120. Thereby, it is possible to further easily prevent the support member 120 from rotating in the rotational direction of the drive side rotating body 110 in advance of the drive side rotating body 110 at the start of the rotational driving of the drive side rotating body 110. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational drive of the drive side rotator 110.

  (4) The drive-side rotator 110 includes first and second drive-side inclined surfaces 111a and 111b that are inclined with respect to the direction of the rotation axis L5 of the drive-side rotator 110. Then, at the start of the rotational drive of the drive-side rotator 110, the first and second drive-side inclined surfaces 111a and 111b are changed from the rotation direction of the drive-side rotator 110 to the first and second inclined surfaces 121a and 121b. Surface contact. Therefore, when the first and second drive-side inclined surfaces 111a and 111b come into contact with the first and second inclined surfaces 121a and 121b, the rotation axis L6 of the support member 120 from the pressing force by the drive-side rotating body 110. Directional component force can be generated stably and easily. Then, by this component force, the support member 120 is pressed toward the drive-side rotator 110 that overlaps in the direction of the rotation axis L6 of the support member 120. Therefore, it is possible to more effectively suppress the support member 120 from rotating in the rotational direction of the drive side rotating body 110 in advance of the drive side rotating body 110 at the start of the rotational drive of the drive side rotating body 110. As a result, it is possible to more effectively suppress the generation of noise at the start of the rotational drive of the drive-side rotator 110.

<Third Embodiment>
Hereinafter, a third embodiment of a motor provided with a clutch will be described. In the present embodiment, the same reference numerals are given to the same configurations as the configurations of the first embodiment and the corresponding configurations, and the description thereof is omitted.

  As shown in FIG. 11, the clutch 130 of this embodiment is provided in the motor 10 instead of the clutch 40 of the first embodiment. The clutch 130 is configured to include a support member 140 instead of the support member 43 in the clutch 40 of the first embodiment. And the support member 140 becomes a structure provided with the urging | biasing part 141 in the support member 43 of the said 1st Embodiment. The support member 140 does not include the first and second inclined surfaces 69a and 69b of the first embodiment, and the first and second roller supports 64a and 64b are the rotation axes of the drive-side rotator 42. The width in the circumferential direction (the rotation direction of the drive side rotating body 42) is constant along the direction.

  As shown in FIGS. 11 and 12, the urging portion 141 is integrally provided at the center portion in the circumferential direction (rotating direction of the support member 140) of each connecting portion 66. In each connecting portion 66, the urging portion 141 includes an extending portion 141a extending from the connecting portion 66 along the rotation axis L7 of the support member 140 toward the ring portion 61, and from the distal end portion of the extending portion 141a to the outer peripheral side. And a protruding pressing portion 141b.

  The extending portion 141a is elastically deformable so that the position of the distal end portion changes in the radial direction with respect to the proximal end portion. In a state before the support member 140 is inserted into the clutch housing 41 (that is, the state shown in FIG. 12), the radially outer side surface of the extending portion 141 a is flush with the outer peripheral surface of the connecting portion 66. Yes.

  The pressing portion 141 b protrudes radially outward from the outer peripheral surface of the connecting portion 66. When viewed from the direction of the rotation axis L7 of the support member 140, the slidable contact surface 141c that is the distal end surface (side surface facing the radially outer side) of the pressing portion 141b has an arc shape that swells toward the outer peripheral side. The sliding contact surface 141c is curved with the same curvature as that of the inner peripheral surface 41c of the clutch housing 41, for example. In the state before the support member 140 is inserted inside the clutch housing 41, the sliding contact surface 141 c is located on the radially outer side than the outer peripheral surface of the connecting portion 66. In the same state, the diameter of a circle (not shown) in which the sliding contact surfaces 141c of the two urging portions 141 are inscribed is larger than the inner diameter of the clutch housing 41 when viewed from the direction of the rotation axis L7.

  As shown in FIG. 11, such a support member 140 is inserted inside the clutch housing 41 in a state in which the extending portion 141 a of each urging portion 141 is elastically deformed radially inward. The sliding contact surface 141c of each urging portion 141 is pressed against the inner peripheral surface 41c of the clutch housing 41 by the elastic force of the extending portion 141a. That is, the support member 140 presses the pressing portion 141b toward the inner peripheral surface 41c of the clutch housing 41 so that the sliding contact surface 141c that contacts the inner peripheral surface 41c of the clutch housing 41 is pressed against the inner peripheral surface 41c. It has a biasing part 141 (extension part 141a) that generates a pressing force. The sliding contact surface 141c is in press contact with the inner peripheral surface 41c of the clutch housing 41 so as to be slidable in the rotational direction of the support member 140, and the support member 140 is between the inner peripheral surface 41c and the sliding contact surface 141c. Frictional force (load) is generated that makes it difficult to rotate around the rotation axis of the drive-side rotator 42. That is, the extending portion 141a of the biasing portion 141 acts to increase the frictional force between the inner peripheral surface 41c of the clutch housing 41 and the pressing portion 141b.

Next, the operation of this embodiment will be described.
When the rotational drive of the rotary shaft 24 is started by driving the motor unit 20, the rotational drive of the drive side rotating body 42 that rotates integrally with the rotary shaft 24 is started. Along with the rotation of the drive-side rotator 42, the circumferential end on the front side in the rotation direction of each rolling-element release portion 57 of the drive-side rotator 42 comes into contact with each rolling-element holding portion 62 in the rotation direction (see FIG. 8 (a)).

  At this time, the support member 140 is difficult to rotate around the rotational axis of the drive-side rotator 42 due to the frictional force between the inner peripheral surface 41c of the clutch housing 41 and the sliding contact surface 141c. Therefore, at the start of the rotational drive of the driving side rotating body 42, the support member 140 is driven by the impact when the rolling element releasing portion 57 contacts the rolling element holding portion 62 from the rotation direction of the driving side rotating body 42. It is suppressed that it is skipped in the rotational direction of 42 and rotates ahead of the drive-side rotator 42. Therefore, after the rolling element releasing part 57 contacts the rolling element holding part 62 from the rotational direction of the driving side rotating body 42, the driving side rotating body 42 and the support member 140 are likely to rotate integrally. And each rolling element release part 57 contacted to each rolling element holding part 62 in the rotation direction presses rolling element 44 in the rotation direction of drive side rotating body 42 via each rolling element holding part 62, The holding of each rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the control surface 83 of the driven side rotating body 45 is released.

  The support member 140 is pressed in the rotation direction of the drive-side rotator 42 by the drive-side rotator 42, thereby releasing the rolling element 44 from being held between the inner peripheral surface 41 c of the clutch housing 41 and the driven-side rotator 45. After that, the driven-side rotating body 45 may try to sandwich the rolling element 44 again between the inner peripheral surface 41 c of the clutch housing 41. However, in the present embodiment, the drive side rotating body 42 and the support member 140 are easily rotated integrally by suppressing the support member 140 from rotating before the drive side rotating body 42. . Therefore, when the driving side rotating body 42 and the support member 140 rotate integrally, the holding of the rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the driven side rotating body 45 is immediately released.

According to the present embodiment, in addition to the same effects as (1) of the first embodiment, the following effects can be achieved.
(1) The support member 140 has a pressing portion 141b that comes into contact with and slides on the inner peripheral surface 41c of the clutch housing 41. The extending portion 141 a of the urging portion 141 acts to increase the frictional force between the pressing portion 141 b and the inner peripheral surface 41 c of the clutch housing 41. As described above, the friction force between the pressing portion 141b and the inner peripheral surface 41c of the clutch housing 41 is increased by the extending portion 141a, so that the support member 140 is rotated by the friction force. It becomes difficult to rotate around. Accordingly, it is possible to easily suppress the support member 140 from rotating in the rotational direction of the driving side rotating body 42 ahead of the driving side rotating body 42 at the start of the rotational driving of the driving side rotating body 42 by the frictional force. it can. As a result, it is possible to easily suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

  (2) The support member 140 faces the pressing portion 141b toward the inner peripheral surface 41c of the clutch housing 41 so that the sliding contact surface 141c that contacts the inner peripheral surface 41c of the clutch housing 41 is pressed against the inner peripheral surface 41c. There is an urging portion 141 that generates a pressing force to be pressed. Thus, the pressing portion 141b is pressed against the inner peripheral surface 41c of the clutch housing 41 by the pressing force generated by the urging portion 141, so that the pressing portion 141b (sliding contact surface 141c) and the inner peripheral surface of the clutch housing 41 are pressed. The frictional force with 41c is easily increased. Then, the support member 140 is difficult to rotate around the rotation axis of the drive side rotating body 42 by this frictional force. Therefore, it is possible to more easily prevent the support member 140 from rotating in the rotational direction of the drive side rotating body 42 prior to the drive side rotating body 42 at the start of the rotational drive of the drive side rotating body 42. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

<Fourth embodiment>
Hereinafter, a fourth embodiment of a motor provided with a clutch will be described. In the present embodiment, the same reference numerals are given to the same configurations as the configurations of the first embodiment and the corresponding configurations, and the description thereof is omitted.

  As shown in FIGS. 13A and 13B, the clutch 150 of this embodiment is provided in the motor 10 in place of the clutch 40 of the first embodiment. The clutch 150 is configured to include a support member 160 in place of the support member 43 in the clutch 40 of the first embodiment. The support member 160 does not include the first and second inclined surfaces 69a and 69b of the first embodiment, and the first and second roller supports 64a and 64b are the rotation axes of the drive-side rotator 42. The width in the circumferential direction (the rotation direction of the drive side rotating body 42) is constant along the direction.

  The support member 160 has a configuration in which a plurality of resistance protrusions 161 as load generating portions are provided on the ring portion 61 of the support member 43 of the first embodiment. The plurality of resistance protrusions 161 protrude in the axial direction from one end surface of the ring portion 61 in the axial direction and opposite to the flange portion 52 in the axial direction. In the present embodiment, 24 resistance protrusions 161 are provided on one end face in the axial direction of the ring portion 61 at equal angular intervals (15 ° intervals) in the circumferential direction. In FIG. 13B, only the resistance protrusion 161 provided in the lower half of the ring portion 61 in FIG. 13A is shown and the upper half is provided in order to avoid making the drawing complicated. Illustration of the resistance protrusion 161 is omitted. Each of the resistance protrusions 161 has a substantially flat plate shape. When the ring portion 61 is viewed from the outside in the radial direction, the resistance protrusion 161 protrudes in the axial direction from one end surface of the ring portion 61 in the axial direction, and in the direction of the rotation axis L8 of the support member 160 It is inclined with respect to. In the present embodiment, when the ring portion 61 is viewed from the drive-side rotator 42 side (the state shown in FIG. 13A), each resistance protrusion 161 has its distal end closer to the counterclockwise side than its base end. Inclined to be located. In addition, the height of each resistance protrusion 161 in the direction of the rotation axis L8 is lower than the height of the upper protrusion 61b in the direction of the rotation axis L8. Therefore, in the state in which the support member 160 and the drive-side rotator 42 are assembled, the upper protrusion 61b contacts the flange 52 from the axial direction, but each resistance protrusion 161 does not contact the flange 52.

  Each resistance protrusion 161 has first and second resistance inclined surfaces 162 a and 162 b at both ends in the rotation direction of the support member 160. In each resistance protrusion 161, one side surface in the rotation direction of the support member 160 (a side surface on the counterclockwise side when viewing the ring portion 61 from the drive-side rotating body 42 side and the right side surface in FIG. 13B). The first resistance inclined surface 162a is inclined with respect to the direction of the rotation axis L8 of the support member 160. In the present embodiment, in each resistance protrusion 161, the first resistance inclined surface 162a is inclined with respect to the direction of the rotation axis L8 so as to form an acute angle θ1 with one end surface of the ring portion 61 in the axial direction. . Further, in each resistance protrusion 161, the other side surface in the rotation direction of the support member 160 (the side surface on the clockwise side when viewing the ring portion 61 from the drive side rotating body 42 side, and the left side surface in FIG. 13B). The second resistance inclined surface 162b is inclined with respect to the direction of the rotation axis L8 of the support member 160. In the present embodiment, in each resistance protrusion 161, the second resistance inclined surface 162b is inclined with respect to the direction of the rotation axis L8 so as to form an obtuse angle θ2 with one end surface of the ring portion 61 in the axial direction. .

Next, the operation of this embodiment will be described.
When the rotational drive of the rotary shaft 24 is started by driving the motor unit 20, the rotational drive of the drive side rotating body 42 that rotates integrally with the rotary shaft 24 is started. Along with the rotation of the drive-side rotator 42, the circumferential end on the front side in the rotation direction of each rolling-element release portion 57 of the drive-side rotator 42 comes into contact with each rolling-element holding portion 62 in the rotation direction (see FIG. 8 (a)).

  Here, FIG. 14A illustrates a case where the drive side rotating body 42 rotates counterclockwise (in the direction of the arrow α1 in FIG. 14A) when viewed from the motor unit 20 side. Since the air resistance of the support member 160 is increased by the plurality of resistance protrusions 161, the air resistance is increased compared to a support member that does not include the resistance protrusions 161. Therefore, the support member 160 is difficult to rotate around the rotation axis of the drive side rotating body 42. Further, each of the resistance protrusions 161 protruding in the axial direction from the ring portion 61 has a first resistance inclined surface 162a that is inclined with respect to the direction of the rotation axis L8 of the support member 160. Therefore, when the support member 160 rotates around the rotation axis of the drive-side rotator 42, the pressing force F3 due to air resistance acting on the first resistance inclined surface 162a depends on the inclination direction of the first resistance inclined surface 162a. A component force F3a in the direction of the rotation axis L8 of the support member 160 is generated. In the present embodiment, the component force F3a is a force toward the drive side rotating body 42. By this component force F3a, the support member 160 is pressed toward the drive side rotating body 42 that overlaps in the direction of the rotation axis L8 of the support member 160, and thus the upper protrusion 61b is pressed against the flange portion 52. As a result, the frictional force between the upper protrusion 61b and the flange 52 is increased. That is, the resistance protrusion 161 having the first resistance inclined surface 162a acts to increase the frictional force between the upper protrusion 61b and the flange 52. Therefore, the support member 160 is more difficult to rotate around the rotation axis of the drive side rotating body 42 due to the frictional force between the upper protrusion 61 b and the flange 52. For these reasons, the support member 160 is driven by an impact when the rolling element releasing portion 57 comes into contact with the rolling element holding portion 62 from the rotation direction of the driving side rotating body 42 at the start of the rotational driving of the driving side rotating body 42. It is suppressed that the side rotating body 42 is skipped in the rotation direction and rotates ahead of the driving side rotating body 42. Therefore, after the rolling element releasing portion 57 contacts the rolling element holding portion 62 from the rotation direction of the driving side rotating body 42, the driving side rotating body 42 and the support member 160 are likely to rotate integrally. And each rolling element release part 57 contacted to each rolling element holding part 62 in the rotation direction presses rolling element 44 in the rotation direction of drive side rotating body 42 via each rolling element holding part 62, The holding of each rolling element 44 by the inner peripheral surface of the clutch housing 41 and the control surface 83 of the driven side rotating body 45 is released (see FIG. 8A).

  When the support member 160 is pressed in the rotation direction of the drive-side rotator 42 by the drive-side rotator 42, the holding of the rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the driven-side rotator 45 is released. After that, the driven-side rotating body 45 may try to sandwich the rolling element 44 again between the inner peripheral surface 41 c of the clutch housing 41. However, in the present embodiment, the drive member rotator 42 and the support member 160 are easily rotated integrally by suppressing the support member 160 from rotating before the drive member rotator 42. . Therefore, when the driving side rotating body 42 and the support member 160 rotate integrally, the holding of the rolling element 44 by the inner peripheral surface 41c of the clutch housing 41 and the driven side rotating body 45 is immediately released.

  Further, as shown in FIG. 14B, when the motor unit 20 is driven, the driving side rotating body 42 rotates in the clockwise direction (in the direction of arrow α2 in FIG. 14B) as viewed from the motor unit 20 side. Similar effects can be obtained. That is, since the air resistance of the support member 160 is increased by the plurality of resistance protrusions 161, the air resistance is increased compared to a support member that does not include the resistance protrusions 161. Therefore, the support member 160 is difficult to rotate around the rotation axis of the drive side rotating body 42. Furthermore, each resistance protrusion 161 protruding in the axial direction from the ring portion 61 has a second resistance inclined surface 162b inclined with respect to the direction of the rotation axis L8 of the support member 160. Therefore, when the support member 160 rotates around the rotation axis of the driving side rotating body 42, the pressing force F4 due to the air resistance acting on the second resistance inclined surface 162b depends on the inclination direction of the second resistance inclined surface 162b. A component force F4a in the direction of the rotation axis L8 of the support member 160 is generated. In this case, the component force F4a is a force directed in the direction opposite to the drive-side rotator 42. By this component force F4a, the support member 160 is pressed toward the clutch housing 41 that overlaps in the direction of the rotation axis L8 of the support member 160, so the lower protrusion 61a is pressed against the flange portion 41a. As a result, the frictional force between the lower protrusion 61a and the flange 41a is increased. That is, the resistance protrusion 161 having the second resistance inclined surface 162b acts to increase the frictional force between the lower protrusion 61a and the flange 41a. Therefore, the support member 160 becomes more difficult to rotate around the rotation axis of the drive side rotating body 42 due to the frictional force between the lower protrusion 61a and the flange portion 41a. From these facts, even when the drive-side rotator 42 rotates in the direction of the arrow α2, the rolling element release unit 57 starts from the rotation direction of the drive-side rotator 42 when the drive-side rotator 42 starts rotating. It is suppressed that the support member 160 is blown in the rotation direction of the driving side rotating body 42 by the impact when it comes into contact with the rolling element holding part 62 and rotates ahead of the driving side rotating body 42. Therefore, after the rolling element releasing portion 57 contacts the rolling element holding portion 62 from the rotation direction of the driving side rotating body 42, the driving side rotating body 42 and the support member 160 are likely to rotate integrally.

According to the present embodiment, in addition to the same effects as (1) of the first embodiment, the following effects can be achieved.
(1) The support member 160 includes a lower protrusion 61 a that contacts the flange portion 41 a of the clutch housing 41 and an upper protrusion 61 b that contacts the flange 52 of the drive side rotating body 42. The resistance protrusion 161 is a frictional force between the lower protrusion 61a and the flange 41a or a frictional force between the upper protrusion 61b and the flange 52 at the start of the rotational drive of the drive-side rotator 42. Acts to increase As described above, the frictional force between the lower protrusion 61a and the flange 41a or the frictional force between the upper protrusion 61b and the flange 52 is increased by the resistance protrusion 161. It becomes difficult for the support member 160 to rotate around the rotation axis of the drive-side rotator 42. Therefore, it is possible to easily suppress the support member 160 from rotating in the rotational direction of the driving side rotating body 42 ahead of the driving side rotating body 42 at the start of the rotational driving of the driving side rotating body 42 by the frictional force. it can. As a result, it is possible to easily suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

  (2) The support member 160 has the support member 160 attached to the clutch housing 41 or the driving side rotating body 42 so that the lower protrusion 61a is pressed against the flange 41a or the upper protrusion 61b is pressed against the flange 52. It has a resistance protrusion 161 that generates a pressing force (ie, a component force F3a or a component force F4a) to be pressed. Then, the lower projection 61a is pressed against the flange 41a by the component force F3a generated by the resistance projection 161, so that the frictional force between the lower projection 61a and the flange 41a is easily increased. Further, when the upper protrusion 61b is pressed against the flange 52, the frictional force between the upper protrusion 61b and the flange 52 is easily increased. This frictional force makes it difficult for the support member 160 to rotate about the rotation axis of the drive side rotor 42. Therefore, it is possible to more easily suppress the support member 160 from rotating in the rotational direction of the drive side rotating body 42 prior to the drive side rotating body 42 at the start of the rotational drive of the drive side rotating body 42. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

  (3) When the support member 160 rotates around the rotation axis of the drive side rotating body 42, the air resistance acting on the support member 160 by the resistance protrusion 161 is increased, so that the support member 160 rotates the drive side rotating body 42. It becomes difficult to rotate around the axis. Therefore, the resistance protrusion 161 can easily prevent the support member 160 from rotating in the rotational direction of the driving side rotating body 42 before the driving side rotating body 42 at the start of the rotational driving of the driving side rotating body 42. it can. As a result, it is possible to easily suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

  (4) The resistance protrusion 161 protruding in the axial direction from one end surface of the ring portion 61 in the axial direction is inclined with respect to the rotation axis L8 direction of the support member 160 (same as the rotation axis direction of the drive side rotating body 42). The first and second resistance inclined surfaces 162a and 162b are provided. Therefore, when the support member 160 rotates about the rotation axis of the drive side rotor 42, the pressing force F3 due to the air resistance acting on the first resistance inclined surface 162a or the air resistance acting on the second resistance inclined surface 162b. A component force in the direction of the rotation axis L8 of the support member 160 is generated from the pressure F4. With this component force, the support member 160 is pressed toward the clutch housing 41 or the drive side rotating body 42 that overlaps the direction of the rotation axis L8 of the support member 160. Thereby, it can suppress more effectively that the support member 160 rotates ahead of the drive side rotary body 42 in the rotation direction of the drive side rotary body 42 at the start of the rotational drive of the drive side rotary body 42. . As a result, it is possible to more effectively suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

In addition, you may change each said embodiment as follows.
In the fourth embodiment, each resistance protrusion 161 includes first and second resistance inclined surfaces 162a and 162b that are inclined with respect to the direction of the rotation axis L8 of the support member 160. However, each resistance protrusion 161 does not necessarily have to include the first and second resistance inclined surfaces 162a and 162b. For example, each resistance protrusion 161 may have a configuration including only one of the first and second resistance inclined surfaces 162a and 162b. Further, for example, each resistance protrusion 161 does not include any of the first and second resistance inclined surfaces 162a and 162b, that is, a structure in which both end surfaces in the circumferential direction of each resistance protrusion 161 are parallel to the direction of the rotation axis L8. It may be.

  In the fourth embodiment, each resistance protrusion 161 protrudes in the direction of the rotation axis L8 of the support member 160 from one end surface of the ring portion 61 in the axial direction. However, the resistance protrusion 161 may be provided at a position that protrudes from the outer surface of the support member 160 and increases the air resistance when the support member 160 rotates about the rotation axis of the drive side rotating body 42.

  For example, the support member 170 illustrated in FIGS. 15A and 15B includes a plurality of resistance protrusions 171 that protrude radially outward from the outer peripheral surface of the ring portion 61. The plurality of resistance protrusions 171 have a substantially flat plate shape whose thickness direction is the circumferential direction of the ring portion 61, and are arranged in the circumferential direction of the ring portion 61. In addition, each resistance protrusion 171 is inclined so that the tip thereof is shifted to one side in the circumferential direction with respect to the base end. That is, each resistance protrusion 171 is inclined with respect to the radial direction (direction orthogonal to the rotation axis of the support member 170). If it does in this way, the same effect as (3) of the above-mentioned 4th embodiment can be acquired. Moreover, since each resistance protrusion 171 is inclined with respect to the radial direction, the support member 170 can be made smaller in the radial direction than when each resistance protrusion 171 extends along the radial direction.

  Each resistance protrusion 171 may have a configuration in which the distal end thereof extends along the radial direction without being displaced in the circumferential direction with respect to the proximal end. Even if it does in this way, the effect similar to (3) of the said 4th Embodiment can be acquired. Further, the resistance protrusion 171 may be inclined with respect to the rotation axis direction of the support member 170. If it does in this way, the effect similar to the said 4th Embodiment can be acquired.

  Further, as shown in FIGS. 16A and 16B, a resistance protrusion 171 may be further added to the support member 160 of the fourth embodiment. In this case, when the support member 160 rotates around the rotation axis of the drive-side rotator 42, the air resistance acting on the support member 160 not only by the resistance protrusion 161 but also by the resistance protrusion 171 is increased. Is more difficult to rotate around the rotation axis of the drive-side rotator 42. Therefore, it is possible to further suppress the support member 160 from rotating in the rotational direction of the driving side rotating body 42 before the driving side rotating body 42 at the start of the rotational driving of the driving side rotating body 42. As a result, it is possible to further suppress the generation of noise at the start of the rotational drive of the drive side rotator 42.

  In the third embodiment, the support member 140 has two urging portions 141. However, the number of the urging portions 141 included in the support member 140 is not limited to two and may be plural. In order to suppress the rotation axis L7 of the support member 140 from being displaced from the rotation axis of the driven-side rotating body 45 (same as the central axis L2 of the worm shaft 34) due to the pressing force of the plurality of urging portions 141, each urging force is applied. It is preferable that the position and pressing force of the part 141 are adjusted.

  -The shape of the urging | biasing part 141 with which the support member 140 of the said 3rd Embodiment is provided is not restricted to the thing of the said 3rd Embodiment. The urging portion 141 only needs to be in contact with the inner peripheral surface 41 c of the clutch housing 41 and press the inner peripheral surface 41 c toward the radially outer side. For example, the urging portion 141 may be an elastic member provided so as to protrude radially outward from the outer peripheral surface of the axial support portion 63. The elastic member is made of, for example, an elastomer. The urging portion 141 made of an elastic member is disposed in a state of being elastically deformed so as to be crushed in the radial direction between the axial support portion 63 and the inner peripheral surface 41c of the clutch housing 41, and the elastic force causes the urging portion 141 to The peripheral surface 41c is pressed outward in the radial direction. Even if it does in this way, the effect similar to the said 3rd Embodiment can be acquired.

  In the second embodiment, the first driving side inclined surface 111a and the first inclined surface 121a, and the second driving side inclined surface 111b and the second inclined surface 121b are in surface contact with each other. It may be configured to contact.

  In the second embodiment, when the first and second drive-side inclined surfaces 111a and 111b and the first and second inclined surfaces 121a and 121b are in contact with the rotation direction of the drive-side rotating body 110, Then, a pressing force (component force F2a) is generated that presses the support member 120 toward the driving side rotating body 110 so that the upper protrusion 61b is pressed against the flange 52. However, when the first and second drive-side inclined surfaces 111a and 111b and the first and second inclined surfaces 121a and 121b are in contact with the rotation direction of the drive-side rotating body 110, the lower protrusion 61a. May be configured to generate a pressing force that presses the support member 120 toward the clutch housing 41 such that the pressing force is pressed against the flange portion 41a. That is, the direction of inclination of the first and second drive side inclined surfaces 111a and 111b with respect to the direction of the rotation axis L5 and the rotation axis so that a component force in the direction opposite to the component force F2a in the second embodiment is generated. The direction of inclination of the first and second inclined surfaces 121a and 121b with respect to the L6 direction may be opposite to that of the second embodiment. If it does in this way, the frictional force between the lower side protrusion 61a and the flange part 41a will increase easily by the lower side protrusion 61a being pressed on the flange part 41a with the generated pressing force (component force). The The frictional force makes it difficult for the support member 120 to rotate around the rotation axis L5 of the drive-side rotator 110. Therefore, even in this case, the rotation of the support member 120 in the rotational direction of the drive-side rotator 110 prior to the drive-side rotator 110 at the start of the rotation drive of the drive-side rotator 110 is more easily suppressed. can do. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational drive of the drive side rotator 110.

  In the first embodiment, the first and second inclined surfaces 69a and 69b are configured such that the lower protrusion 61a is a flange portion when the rolling element release portion 57 comes into contact with the rotation side of the driving side rotating body 42. A pressing force (component force F1a) for pressing the support member 43 toward the clutch housing 41 is generated so as to be pressed against 41a. However, the first and second inclined surfaces 69a and 69b are arranged such that the upper protrusion 61b is pressed against the flange portion 52 when the rolling element releasing portion 57 comes into contact with the driving side rotating body 42 in the rotational direction. You may be comprised so that the pressing force which presses the support member 43 toward the drive side rotary body 42 may be generated. That is, when the rolling element release portion 57 contacts the first and second inclined surfaces 69a and 69b from the rotational direction of the driving side rotating body 42, the component force in the direction opposite to the component force F1a in the first embodiment. The first and second inclined surfaces 69a and 69b may be inclined in the direction opposite to that in the first embodiment so that the rotation axis L4 is generated. If it does in this way, the frictional force between the upper side protrusion 61b and the collar part 52 will increase easily by the upper side protrusion 61b being pressed on the collar part 52 by the generated pressing force (component force). The frictional force makes it difficult for the support member 43 to rotate around the rotational axis of the drive-side rotator 42. Accordingly, even in this case, the rotation of the support member 43 in the rotational direction of the drive-side rotator 42 prior to the drive-side rotator 42 at the start of the rotational drive of the drive-side rotator 42 is more easily suppressed. can do. As a result, it is possible to more easily suppress the generation of noise at the start of the rotational driving of the driving side rotating body 42.

  In each of the above embodiments, the lower protrusion 61 a forms a protrusion that extends along the circumferential direction of the ring portion 61. However, the shape of the lower protrusion 61a is not limited to this, and may be any shape that protrudes in the axial direction from the ring portion 61 so as to be able to contact the flange 41a from the axial direction. For example, the lower protrusion 61a may be configured by a plurality of protrusions protruding in the axial direction from the ring portion 61 and provided intermittently along the circumferential direction.

  In each of the above embodiments, the upper protrusion 61 b is a substantially hemispherical protrusion that protrudes from the ring portion 61 in the axial direction. However, the shape of the upper protrusion 61b is not limited to this, and may be any shape that protrudes in the axial direction from the ring portion 61 so as to be able to contact the flange 52 in the axial direction. For example, the upper protrusion 61 b may be an annular protrusion that extends along the circumferential direction of the ring portion 61.

  In the first embodiment, the support member 43 has the lower protrusion 61 a that comes into contact with the flange portion 41 a of the clutch housing 41 from the axial direction. However, the support member 43 does not necessarily need to directly contact the flange portion 41a. For example, a member such as a washer may be interposed between the ring portion 61 and the flange portion 41a. The same applies to the support members 120, 140, and 160 of the second to fourth embodiments.

  In the first embodiment, the support member 43 has the upper protrusion 61b that comes into contact with the flange portion 52 of the drive side rotating body 42 from the axial direction. However, the support member 43 does not necessarily have to directly contact the flange portion 52. For example, a member such as a washer may be interposed between the ring portion 61 and the flange portion 52. The same applies to the support members 120, 140, and 160 of the second to fourth embodiments.

  -In the said 1st Embodiment, the shape of the clutch housing 41 which comprises the clutch 40, the drive side rotary body 42, the support member 43, the rolling element 44, and the driven side rotary body 45 is not necessarily the shape of the said 1st Embodiment. May be. For example, the driving side rotating body 42 may be formed integrally with the rotating shaft 24. Further, for example, the driven-side rotator 45 may be provided separately from the worm shaft 34 and assembled so as to be rotatable integrally with the worm shaft 34. Further, the number of rolling elements 44 is not limited to two, and it is sufficient that at least one rolling element 44 is disposed between the inner peripheral surface 41 c of the clutch housing 41 and the driven side rotating body 45. The same applies to the clutches 100, 130, and 150 of the second to fourth embodiments.

-You may implement combining 2 or more embodiment among the said 1st thru | or 4th embodiment.
In each of the above embodiments, the motor 10 is used as a drive source for the power window device, but may be used as a drive source for other devices.

  In each of the above embodiments, the clutches 40, 100, 130, and 150 are provided in the motor 10 and connect the rotating shaft 24 and the worm shaft 34 of the speed reduction mechanism 32. However, the clutches 40, 100, 130, and 150 are provided in devices other than the motor 10, and connect the rotating shaft that is rotationally driven to the driven shaft that transmits the rotational driving force of the rotating shaft. Good.

  DESCRIPTION OF SYMBOLS 10 ... Motor, 20 ... Motor part, 24 ... Rotating shaft, 30 ... Output part, 34 ... Worm shaft as driven shaft, 40, 100, 130, 150 ... Clutch, 41 ... Clutch housing, 41c ... Inner peripheral surface, 42 , 110: Driving side rotating body, 43, 120, 140, 160, 170 ... Support member, 44 ... Rolling body, 45 ... Driven side rotating body, 61a ... Lower projection as the first contact part, 61b ... First 2 upper protrusions as contact parts, 69a, 121a ... load generation part and first inclined surface as an inclined surface, 69b, 121b ... second generation inclined surface as load generation part and inclined surface, 111a ... drive side 1st drive side inclined surface as an inclined surface, 111b ... 2nd drive side inclined surface as a drive side inclined surface, 141 ... Energizing part as a load generation part, 141b ... Pressing part as 1st contact part , 161, 171 ... negative Resistance projections as generating parts, 161a ... first resistance slope as a resistance slope, 161b ... second resistance slope as a resistance slope, F1a, F2a, F3a, F4a ... component force as pressing force, L4, L6, L7, L8 ... rotation axis of the support member, L5 ... rotation axis of the drive side rotating body.

Claims (8)

An annular clutch housing;
A drive-side rotating body that is rotationally driven;
A driven-side rotating body that is inserted inside the clutch housing and to which a rotational driving force is transmitted from the driving-side rotating body;
It is disposed between the inner peripheral surface of the clutch housing and the driven-side rotator, and rotates around the rotational axis of the drive-side rotator together with the drive-side rotator when the drive-side rotator is driven to rotate. A rolling element that prevents rotation of the driven-side rotating body by being sandwiched between the clutch housing and the driven-side rotating body during non-rotating driving of the side rotating body;
A support member that holds the rolling element between an inner peripheral surface of the clutch housing and the driven-side rotator, and that can rotate about the rotation axis of the drive-side rotator together with the drive-side rotator;
With
At the start of the rotational drive of the drive-side rotator, the drive-side rotator contacts the support member from the rotation direction and presses the rolling element in the rotation direction via the support member. A clutch for releasing the holding of the rolling element by a driven rotating body,
The support member includes a load generating unit that generates a load that makes it difficult to rotate the support member around the rotation axis of the drive side rotator at least when the drive side rotator starts to rotate. To clutch. The clutch according to claim 1, wherein
The support member has at least one contact portion of a first contact portion that contacts the clutch housing and a second contact portion that contacts the drive-side rotating body,
The load generating unit is configured to generate at least one of a frictional force between the clutch housing and the first contact part and a frictional force between the drive side rotating body and the second contact part. A clutch characterized by being increased. The clutch according to claim 2,
The load generating portion is directed toward the clutch housing or the driving side rotating body such that the first contacting portion is pressed against the clutch housing or the second contacting portion is pressed against the driving side rotating body. And generating a pressing force for pressing the support member. In the clutch according to claim 2 or claim 3,
The support member has a portion that overlaps at least one of the clutch housing and the driving-side rotator in the rotation axis direction of the support member;
The load generating portion is an inclined surface that is inclined with respect to the rotation axis direction of the support member and is in contact with the driving side rotating body from the rotating direction of the driving side rotating body at the start of rotation driving of the driving side rotating body. A clutch characterized by that. The clutch according to claim 4,
The drive-side rotator is inclined with respect to the rotation axis direction of the drive-side rotator, and surface contact or line contact from the rotation direction of the drive-side rotator to the inclined surface at the start of rotational drive of the drive-side rotator. A clutch having a drive-side inclined surface. The clutch according to any one of claims 1 to 3,
The clutch is characterized in that the load generating portion is a resistance protrusion that protrudes from an outer surface of the support member and increases an air resistance that acts on the support member when the support member rotates about the rotation axis of the drive side rotating body. . The clutch according to claim 6, wherein
The support member has a portion that overlaps at least one of the clutch housing and the driving-side rotator in the rotation axis direction of the support member;
The clutch, wherein the resistance protrusion has a resistance inclined surface protruding in an axial direction from an outer surface of the support member and inclined with respect to a rotation axis direction of the support member. A motor unit having a rotary shaft that is driven to rotate;
The clutch according to any one of claims 1 to 7, comprising the driving-side rotating body that rotates integrally with the rotating shaft.
An output unit that has a driven shaft that rotates integrally with the driven-side rotator, and that outputs a rotational driving force transmitted to the driven shaft;
A motor comprising: