Rotating device and power transmission device

Abstract

The present application provides a rotating device and a power transmission device that suppress generation of contact sound of a centrifugal member with a guide surface. A rotating device (10) includes a first rotating body (2), a second rotating body (3), a centrifugal member (4), and a first rolling member (5). The first rotating body has a housing portion (21) including first and second guide surfaces (211, 212). The first and second guide surfaces face in a circumferential direction. The first rotating body is disposed so as to be rotatable. The second rotating body is disposed so as to be rotatable together with the first rotating body and so as to be rotatable in opposition to the first rotating body. The centrifugal member is disposed in the housing portion. The centrifugal member is disposed so as to be movable in a radial direction by a centrifugal force generated by rotation of the first rotating body or the second rotating body. The centrifugal member is configured to rotate on its own when moving in the radial direction. The first rolling member is disposed between the first guide surface (211) and the centrifugal member. The first rolling member is configured to roll on the first guide surface by rotation on its own of the centrifugal member.

Description

TECHNICAL FIELD

[0001] The present application relates to a rotating device and a power transmission device. BACKGROUND

[0002] A rotating device in which a centrifugal member is attached to a rotating body that rotates around a rotating shaft is known. The rotating device functions by the centrifugal member being subjected to a centrifugal force generated by the rotation of the rotating body. As an example of such a rotating device, there is a torque fluctuation suppression device.

[0003] The torque fluctuation suppression device has an input member and an inertia member. For example, in the torque fluctuation suppression device described in Patent Literature 1, the centrifugal member is disposed in a recess of a hub flange in a manner capable of moving in a radial direction. The centrifugal member is subjected to a centrifugal force generated by the rotation of the hub flange and moves to the radial direction outside in the recess. In addition, in order to enable the centrifugal member to move in the radial direction smoothly, the centrifugal member has a roller. The roller of the centrifugal member rolls on an inner wall surface (guide surface) of the recess.

[0004] Patent Literature 1: Japanese Patent Application Laid-Open No. 2018-132161

[0005] However, in the above-described torque fluctuation suppression device, from the viewpoint of the accuracy of manufacturing, it is difficult to eliminate the gap between the centrifugal member and the guide surface. Therefore, a gap is formed between the centrifugal member and the guide surface. Due to the presence of the gap like this, when the torque fluctuation is switched from the positive direction to the negative direction, there is a problem that a contact sound of the centrifugal member and the inner wall surface occurs. SUMMARY

[0006] Therefore, the technical problem of the present application is to suppress the occurrence of the contact sound of the centrifugal member and the guide surface.

[0007] The rotating device according to a first aspect of the present application has a first rotating body, a second rotating body, a centrifugal member, and a first rolling member. The first rotating body has a housing portion including first and second guide surfaces. The first and second guide surfaces face in a circumferential direction. The first rotating body is disposed in a rotatable manner. The second rotating body is disposed in a manner capable of rotating together with the first rotating body and capable of rotating in opposition to the first rotating body. The centrifugal member is disposed in the housing portion. The centrifugal member is disposed in a manner capable of moving in a radial direction by a centrifugal force generated by the rotation of the first rotating body or the second rotating body. The centrifugal member is configured to rotate on its own when moving in the radial direction. The first rolling member is disposed between the first guide surface and the centrifugal member. The first rolling member is configured to roll on the first guide surface by the rotation on its own of the centrifugal member.

[0008] According to the structure, the first rolling member is arranged between the centrifugal member and the first guide surface. With the first rolling member, the gap between the centrifugal member and the first guide surface can be filled, and as a result, the generation of contact sound between the centrifugal member and the first guide surface can be suppressed. In addition, the centrifugal member rotation is a concept including not only the rotation of the entire centrifugal member but also the rotation of a part of the centrifugal member.

[0009] Preferably, the centrifugal member is configured to roll on the second guide surface.

[0010] Preferably, the centrifugal member and the first rolling member are cylindrical or columnar. The distance between the first guide surface and the second guide surface is smaller than the sum of the diameter of the centrifugal member and the diameter of the first rolling member.

[0011] Preferably, the rotation device further includes a second rolling member. The second rolling member is arranged between the second guide surface and the centrifugal member. The second rolling member rolls on the second guide surface by the rotation of the centrifugal member.

[0012] Preferably, the centrifugal member includes a centrifugal member main body portion, a first rotation portion, and a second rotation portion. The centrifugal member main body portion includes a first end portion and a second end portion in the circumferential direction. The first rotation portion is rotatably attached to the first end portion of the centrifugal member main body portion. The second rotation portion is rotatably attached to the second end portion of the centrifugal member main body portion. The first rolling member is arranged between the first guide surface and the first rotation portion. The first rolling member rolls on the first guide surface by the rotation of the first rotation portion. The second rolling member is arranged between the second guide surface and the second rotation portion. The second rolling member rolls on the second guide surface by the rotation of the second rotation portion.

[0013] Preferably, the rotation device further includes a cam mechanism. The cam mechanism receives a centrifugal force acting on the centrifugal member and converts the centrifugal force into a circumferential force in a direction in which the phase difference in rotation between the first rotation body and the second rotation body is reduced. The cam mechanism includes a cam surface and a cam follower. The cam surface is formed on the centrifugal member. The cam follower is in abutment with the cam surface. The cam follower transmits a force between the centrifugal member and the second rotation body.

[0014] Preferably, the cam follower rolls on the cam surface.

[0015] Preferably, the centrifugal member has a first through-hole that penetrates in the axial direction. The cam surface is constituted by an inner wall surface of the first through-hole.

[0016] Preferably, the cam follower is rotatably attached to the second rotation body.

[0017] Preferably, the second rotation body has a second through-hole. The cam follower rolls on an inner wall surface of the second through-hole.

[0018] Preferably, the cam follower is a cylindrical or columnar roller.

[0019] The rotation device preferably further includes a cam follower that is cylindrical or cylindrical. The centrifugal member has a first through-hole that extends in the axial direction. The second rotating body has a second through-hole that extends in the axial direction. An inner wall surface of the first through-hole constitutes a cam surface. The cam surface faces the radial direction outward and abuts against the cam follower. An inner wall surface of the second through-hole constitutes an abutment surface. The abutment surface faces the radial direction inward and abuts against the cam follower. The cam surface has a first region and a second region. The first region abuts against the cam follower when the centrifugal member rolls on the first guide surface via the first rolling member. The second region abuts against the cam follower when the centrifugal member rolls on the second guide surface. The first region has a different curved surface shape than the second region.

[0020] The first region preferably has a smaller radius of curvature than the second region.

[0021] The abutment surface preferably has a third region and a fourth region. The third region abuts against the cam follower when the centrifugal member rolls on the first guide surface via the first rolling member. The fourth region abuts against the cam follower when the centrifugal member rolls on the second guide surface. The third region has a different curved surface shape than the fourth region.

[0022] The rotation device preferably further includes a cam follower that is cylindrical or cylindrical. The centrifugal member has a first through-hole that extends in the axial direction. The second rotating body has a second through-hole that extends in the axial direction. An inner wall surface of the first through-hole constitutes a cam surface. The cam surface faces the radial direction outward and abuts against the cam follower. An inner wall surface of the second through-hole constitutes an abutment surface. The abutment surface faces the radial direction inward and abuts against the cam follower. The abutment surface has a third region and a fourth region. The third region abuts against the cam follower when the centrifugal member rolls on the first guide surface via the first rolling member. The fourth region abuts against the cam follower when the centrifugal member rolls on the second guide surface. The third region has a different curved surface shape than the fourth region.

[0023] The third region preferably has a larger radius of curvature than the fourth region.

[0024] The rotation device preferably further includes a state maintaining mechanism. The state maintaining mechanism is configured to maintain a state of the centrifugal member in such a manner that a boundary between the first region and the second region contacts the cam follower when the first rotating body and the second rotating body rotate integrally without rotating relative to each other.

[0025] The state maintaining mechanism preferably includes a first engagement portion formed on the first rotating body and a second engagement portion formed on the centrifugal member and engaged with the first engagement portion.

[0026] The second rotating body preferably has a restriction groove. The first rolling member is supported by the restriction groove.

[0027] The housing portion preferably has a bottom surface and a connection surface. The bottom surface faces the radial direction outward. The connection surface connects the first guide surface and the bottom surface.

[0028] The connection surface can be a curved surface or a flat surface.

[0029] The power transmission apparatus according to the second aspect of the present application includes: an input member; an output member to which a torque is transmitted from the input member; and the torque variation suppression device according to any one of the above aspects.

[0030] According to the present application, generation of contact sound of the centrifugal member and the guide surface can be suppressed. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a schematic view of a torque converter.

[0032] Figure 2 is a front view of the torque variation suppression device in a state where an inertia ring on one side is detached.

[0033] Figure 3 is a III-III line sectional view of Figure 2

[0034] Figure 4 is an enlarged front view of the torque variation suppression device.

[0035] Figure 5 is a front view of the torque variation suppression device.

[0036] Figure 6 is an enlarged front view of the torque variation suppression device.

[0037] Figure 7 is a schematic view showing positional relationship of the centrifugal member, the cam follower, the inertia ring, and the first rolling member in a state where a torque variation is not input.

[0038] Figure 8 is a schematic view showing positional relationship of the centrifugal member, the cam follower, the inertia ring, and the first rolling member in a state where a torque variation is input.

[0039] Figure 9 is a graph showing an example of characteristics of the torque variation suppression device.

[0040] Figure 10 is an enlarged view of the torque variation suppression device according to the modified example.

[0041] Figure 11 is a schematic view of a damper device.

[0042] Figure 12 is an enlarged front view of the torque variation suppression device according to the modified example.

[0043] Figure 13 is an enlarged front view of the torque variation suppression device according to the modified example.​

[0044] Figure 14 is an enlarged front view of a torque variation suppression device according to a modification.

[0045] Figure 15 is an enlarged front view of a torque variation suppression device according to a modification.

[0046] Figure 16 is an enlarged front view of a torque variation suppression device according to a modification.

[0047] Figure 17 is an enlarged front view of a torque variation suppression device according to a modification.

[0048] Figure 18 is an enlarged front view of a torque variation suppression device according to a modification.

[0049] Figure 19 is an enlarged front view of a torque variation suppression device according to a modification.

[0050] Figure 20 is an enlarged front view of a torque variation suppression device according to a modification.

[0051] Explanation of Reference Numerals:

[0052] 10: torque variation suppression device; 100: torque converter 2: hub flange; 21: housing portion; 211: first guide surface; 212: second guide surface; 213: bottom surface; 214: connecting surface; 3: inertia ring; 31: second through-hole; 33: restriction groove; 4: centrifugal member; 41: first through-hole; 43: centrifugal member main body portion; 44a: first rotation portion; 44b: second rotation portion; 5: first rolling member; 5a: first rolling member; 5b: second rolling member; 6: cam mechanism; 61: cam surface; 62: cam follower. DETAILED DESCRIPTION

[0053] Hereinafter, a torque variation suppression device (an example of a rotary device) and a torque converter (an example of a power transmission device) according to the present embodiment will be described with reference to the drawings. Figure 1 is a schematic view of the torque converter. In the following description, the axial direction is the direction in which the rotation axis O of the torque variation suppression device extends. In addition, the circumferential direction is the circumference of a circle centered on the rotation axis O, and the radial direction is the diameter direction of the circle centered on the rotation axis O. In addition, the circumferential direction does not need to be completely identical to the circumference of the circle centered on the rotation axis O, and, for example, in Figure 4 , the concept of the left-right direction with the centrifugal member as a reference is also included. In addition, the radial direction does not need to be completely identical to the diameter direction of the circle centered on the rotation axis O, and, for example, in Figure 4The concept also includes the vertical direction based on the centrifugal component.

[0054] [Overall Structure]

[0055] like Figure 1 As shown, the torque converter 100 includes a front cover 11, a torque converter body 12, a locking device 13, and an output hub 14 (an example of an output component). Torque is input from the engine to the front cover 11. The torque converter body 12 has an impeller 121, a turbine 122, and a stator (not shown) connected to the front cover 11. The turbine 122 is connected to the output hub 14. The transmission's input shaft (not shown) is splined into the output hub 14.

[0056] [Locking device 13]

[0057] The locking device 13 includes a clutch section, a piston that operates under hydraulic pressure, and the like, and can be in a lock-up open state and a lock-up closed state. In the lock-up open state, the torque input to the front cover 11 is transmitted to the output hub 14 via the locking device 13 without passing through the torque converter body 12. On the other hand, in the lock-up closed state, the torque input to the front cover 11 is transmitted to the output hub 14 via the torque converter body 12.

[0058] The locking device 13 includes an input-side rotating body 131 (an example of an input component), a damper 132, and a torque variation suppression device 10.

[0059] The input-side rotating body 131 includes a piston that is freely movable in the axial direction, and a friction member 133 is fixed to the side of the front cover 11. The friction member 133 is pressed against the front cover 11, and torque is transmitted from the front cover 11 to the input-side rotating body 131.

[0060] A damper 132 is disposed between the input-side rotating body 131 and the hub flange 2 (described later). The damper 132 has multiple torsion springs that elastically connect the input-side rotating body 131 and the hub flange 2 in the circumferential direction. Through this damper 132, torque is transmitted from the input-side rotating body 131 to the hub flange 2, and torque fluctuations are absorbed and attenuated.

[0061] [Torque Variation Suppression Device 10]

[0062] Figure 2 This is a front view of the torque variation suppression device 10. Figure 3 yes Figure 2 Sectional view along line III-III. Additionally, in Figure 2 In the middle, the inertial ring 3 on one side (the front side) is disassembled.

[0063] like Figures 2-3As shown, the torque variation suppression device 10 has a hub flange 2 (an example of a first rotating body), a pair of inertia rings 3 (examples of second rotating bodies), a centrifugal member 4, a first rolling member 5, and a cam mechanism 6.

[0064] <Hub flange 2>

[0065] The hub flange 2 is configured to be rotatable. The hub flange 2 is configured to be opposed to the input-side rotating body 131 in the axial direction. The hub flange 2 is rotatable relative to the input-side rotating body 131. The hub flange 2 is coupled to the output hub 14. That is, the hub flange 2 rotates integrally with the output hub 14. In addition, the hub flange 2 can be configured by one member with the output hub 14.

[0066] The hub flange 2 is formed in a ring shape. The inner peripheral portion of the hub flange 2 is coupled to the output hub 14. The hub flange 2 has a plurality of accommodation portions 21. In the present embodiment, the hub flange 2 has six accommodation portions 21. The plurality of accommodation portions 21 are disposed at intervals from each other in the circumferential direction. Each of the accommodation portions 21 is formed in the outer peripheral portion of the hub flange 2. Each of the accommodation portions 21 is open toward the radially outer side. The accommodation portion 21 has a prescribed depth.

[0067] Figure 4 is an enlarged view of the torque variation suppression device 10. As shown, Figure 4 the inner wall surface that defines the accommodation portion 21 has a first guide surface 211 and a second guide surface 212 and a bottom surface 213.

[0068] The first guide surface 211 and the second guide surface 212 are directed in the circumferential direction (left-right direction). Figure 4 The first guide surface 211 and the second guide surface 212 are directed toward the centrifugal member 4. In the absence of the centrifugal member 4, the first guide surface 211 and the second guide surface 212 are opposed to each other. The first guide surface 211 and the second guide surface 212 extend substantially parallel to each other. The first and second guide surfaces 211, 212 are planar surfaces.

[0069] The bottom surface 213 links the first guide surface 211 and the second guide surface 212. The bottom surface 213 is substantially circular arc-shaped when viewed in the front view (axial view). The bottom surface 213 is directed toward the radially outer side. The bottom surface 213 is opposed to the outer peripheral surface of the centrifugal member 4.

[0070] <Inertia ring 3>

[0071] As shown in Figure 3 and Figure 5 , the inertia ring 3 is a ring-shaped plate. In detail, the inertia ring 3 is formed in a continuous circular ring shape. The inertia ring 3 functions as a mass body of the torque variation suppression device 10.

[0072] A pair of inertia rings 3 are arranged to clamp the hub flange 2 in the axial direction. The pair of inertia rings 3 are arranged on both sides of the hub flange 2 with a predetermined gap in the axial direction. That is, the hub flange 2 and the pair of inertia rings 3 are arranged in the axial direction. The rotation axis of the inertia rings 3 is the same as the rotation axis of the hub flange 2. The inertia rings 3 can rotate together with the hub flange 2 and can rotate relative to the hub flange 2.

[0073] The inertia ring 3 has a plurality of second through holes 31. The second through holes 31 extend axially. The second through holes 31 penetrate the inertia ring 3 axially. The diameter of the second through holes 31 is larger than the diameter of the small diameter portion 622 of the cam follower 62 described later. In addition, the diameter of the second through holes 31 is smaller than the large diameter portion 621 of the cam follower 62.

[0074] A pair of inertial rings 3 are fixed together by a plurality of rivets 32. Therefore, the pair of inertial rings 3 cannot move relative to each other in the axial, radial, or circumferential directions. That is, the pair of inertial rings 3 rotate together as a unit.

[0075] The inertial ring 3 has multiple limiting grooves 33. The limiting grooves 33 are formed in the same shape at the same position in a pair of inertial rings 3. The limiting grooves 33 are formed in an arc shape that bulges outward in a radial direction.

[0076] like Figure 2 As shown, a plurality of inertial blocks 34 are arranged between a pair of inertial rings 3. The plurality of inertial blocks 34 are arranged at intervals between each other in the circumferential direction. For example, in the circumferential direction, the inertial blocks 34 and the centrifugal element 4 are arranged alternately. The inertial blocks 34 are fixed to the pair of inertial rings 3. Specifically, the inertial blocks 34 are fixed to the pair of inertial rings 3 by rivets 32. In addition, the inertial blocks 34 are thicker than the centrifugal element 4.

[0077] <Centrifugal component 4>

[0078] The centrifugal element 4 is disposed within the receiving portion 21. The centrifugal element 4 is configured to be subjected to centrifugal force by the rotation of the hub flange 2. The centrifugal element 4 is capable of radial movement within the receiving portion 21. Furthermore, the centrifugal element 4 is configured to rotate during radial movement. In this embodiment, the centrifugal element 4 rotates as a whole. The axial movement of the centrifugal element 4 is limited by a pair of inertial rings 3.

[0079] like Figure 4 As shown, the centrifugal component 4 is a circular plate with a first through hole 41 in the center. That is, the centrifugal component 4 is cylindrical. The centrifugal component 4 is thicker than the hub flange 2. The centrifugal component 4 can be composed of a single part.

[0080] The centrifugal member 4 is in contact with the second guide surface 212 and the first rolling member 5. Therefore, movement of the centrifugal member 4 in the circumferential direction is restricted. On the other hand, the centrifugal member 4 is able to move in the radial direction. When the centrifugal member 4 moves in the radial direction, the centrifugal member 4 rolls on the second guide surface 212 of the housing portion 21. In addition, when the centrifugal member 4 moves in the radial direction, the centrifugal member 4 rolls on the first guide surface 211 via the first rolling member 5. That is, the centrifugal member 4 rolls on the outer peripheral surface of the first rolling member 5.

[0081] A surface of the outer peripheral surface of the centrifugal member 4 that is in rolling contact with the outer peripheral surface of the first rolling member 5 when the centrifugal member 4 rolls is the first contact surface 42a. In addition, a surface of the outer peripheral surface of the centrifugal member 4 that is in rolling contact with the second guide surface 212 when the centrifugal member 4 rolls is the second contact surface 42b. The first contact surface 42a and the second contact surface 42b are circular arc shapes when viewed in the axial direction.

[0082] The first through-hole 41 extends in the axial direction. The first through-hole 41 penetrates the centrifugal member 4 in the axial direction. The diameter of the first through-hole 41 is larger than the diameter of the cam follower 62. In detail, the diameter of the first through-hole 41 is larger than the diameter of the large-diameter portion 621 of the cam follower 62. A portion of the inner wall surface that defines the first through-hole 41 constitutes the cam surface 61.

[0083] <First Rolling Member 5>

[0084] The first rolling member 5 is disposed between the first guide surface 211 and the centrifugal member 4. In detail, the first rolling member 5 is sandwiched by the first guide surface 211 and the centrifugal member 4. The first rolling member 5 is in contact with the first guide surface 211 and the centrifugal member 4.

[0085] The center of the first rolling member 5 is located more toward the radially inner side than the center of the centrifugal member 4. The first rolling member 5 is constituted as a cylindrical roller. That is, the first rolling member 5 is not a bearing.

[0086] The first rolling member 5 has a large-diameter portion 51 and a pair of small-diameter portions 52. The centers of the large-diameter portion 51 and the small-diameter portions 52 coincide with each other. The diameter of the large-diameter portion 51 is larger than the small-diameter portions 52. The diameter of the large-diameter portion 51 is larger than the width of the restriction groove 33. Therefore, the first rolling member 5 is supported in the axial direction by the pair of inertial rings 3.

[0087] Each of the small-diameter portions 52 protrudes toward both sides in the axial direction from the large-diameter portion 51. The diameter of the small-diameter portions 52 is smaller than the width of the restriction groove 33. The small-diameter portions 52 are disposed within the restriction groove 33 of the inertial ring 3. A prescribed gap is provided between the small-diameter portions 52 and the inner wall surface of the restriction groove 33, and the small-diameter portions 52 are able to move smoothly within the restriction groove 33. Thus, since the small-diameter portions 52 are disposed within the restriction groove 33, movement of the first rolling member 5 in the radial direction at the time of stoppage is able to be restricted. That is, the first rolling member 5 is supported by the restriction groove 33.

[0088] The first rolling member 5 may be composed of one member. That is, the large-diameter portion 51 and the pair of small-diameter portions 52 of the first rolling member 5 are composed of one member. In addition, the first rolling member 5 may also be a cylindrical shape with a constant diameter. In addition, the first rolling member 5 may also be a cylindrical shape.

[0089] The first rolling member 5 is configured to roll on the first guide surface 211 by the rotation of the centrifugal member 4. That is, by the rotation of the centrifugal member 4, the first rolling member 5 also rotates. In addition, the rotation direction of the centrifugal member 4 is opposite to the rotation direction of the first rolling member 5. In addition, the first rolling member 5 rolls on the first guide surface 211 by its own rotation. Specifically, the large-diameter portion 51 of the first rolling member 5 rolls on the first guide surface 211.

[0090] In a state where there is no relative displacement (rotation phase difference) in the rotation direction between the hub flange 2 and the inertia ring 3, as Figure 5 shown, the small-diameter portion 52 is located approximately at the center in the length direction (circumferential direction) of the restricting groove 33. In addition, when a rotation phase difference occurs between the hub flange 2 and the inertia ring 3, the small-diameter portion 52 moves along the restricting groove 33.

[0091] As Figure 6 shown, the distance H between the first guide surface 211 and the second guide surface 212 is smaller than the sum of the diameter D1 of the centrifugal member 4 and the diameter D2 of the first rolling member 5. That is, the formula H < D1 + D2 holds. Thus, in the operation of the torque fluctuation suppressing device 10, the centrifugal member 4 is always in contact with the second guide surface 212 and the first rolling member 5.

[0092] Since the diameter D2 of the first rolling member 5 is larger than the clearance between the outer peripheral surface of the centrifugal member 4 and the first guide surface 211, the first rolling member 5 is restricted from flying out radially outward.

[0093] <Cam mechanism 6>

[0094] As Figure 4 shown, the cam mechanism 6 is configured to receive the centrifugal force acting on the centrifugal member 4 and convert this centrifugal force into a circumferential force in the direction of reducing the rotation phase difference between the hub flange 2 and the inertia ring 3. In addition, the cam mechanism 6 functions when a rotation phase difference occurs between the hub flange 2 and the inertia ring 3.

[0095] The cam mechanism 6 has a cam surface 61 and a cam follower 62. The cam surface 61 is formed on the centrifugal member 4. Specifically, the cam surface 61 is a part of the inner wall surface of the first through-hole 41 of the centrifugal member 4. The cam surface 61 is a surface with which the cam follower 62 abuts and is an arc shape when observed in the axial direction. The cam surface 61 faces radially outward.

[0096] The cam follower 62 abuts against the cam surface 61. The cam follower 62 is configured to transmit a force between the centrifugal member 4 and the pair of inertia rings 3. In detail, the cam follower 62 extends within the first through-hole 41 and within the second through-hole 31. The cam follower 62 is rotatably mounted on the inertia ring 3.

[0097] The cam follower 62 rolls on the cam surface 61 of the first through-hole 41. In addition, the cam follower 62 rolls on the inner wall surface of the second through-hole 31. In addition, the cam follower 62 abuts against the surface of the inner wall surface of the second through-hole 31 that faces the radially inner side. That is, the cam follower 62 is sandwiched by the cam surface 61 and the inner wall surface of the second through-hole 31.

[0098] In detail, the cam follower 62 abuts against the cam surface 61 on the radially inner side and abuts against the inner wall surface of the second through-hole 31 on the radially outer side. Thereby, the cam follower 62 is positioned. In addition, since the cam follower 62 is sandwiched by the cam surface 61 and the inner wall surface of the second through-hole 31 as such, the cam follower 62 transmits a force between the centrifugal member 4 and the pair of inertia rings 3.

[0099] The cam follower 62 is configured as a cylindrical roller. That is, the cam follower 62 is not a bearing. The cam follower 62 has a large-diameter portion 621 and a pair of small-diameter portions 622. The centers of the large-diameter portion 621 and the small-diameter portions 622 coincide with each other. The diameter of the large-diameter portion 621 is larger than the diameter of the small-diameter portions 622. The diameter of the large-diameter portion 621 is smaller than the diameter of the first through-hole 41 and larger than the diameter of the second through-hole 31. The large-diameter portion 621 rolls on the cam surface 61.

[0100] Each of the small-diameter portions 622 protrudes toward both axial sides from the large-diameter portion 621. The small-diameter portions 622 roll on the inner wall surface of the second through-hole 31. The diameter of the small-diameter portions 622 is smaller than the diameter of the second through-hole 31. The cam follower 62 can be configured by one member. That is, the large-diameter portion 621 and the pair of small-diameter portions 622 of the cam follower 62 are configured by one member. In addition, the cam follower 62 can be a cylindrical shape with a constant diameter. In addition, the cam follower 62 can be a cylindrical shape.

[0101] When a rotational phase difference between the hub flange 2 and the inertia ring 3 is generated due to the contact of the cam follower 62 with the cam surface 61 and the contact of the cam follower 62 with the inner wall surface of the second through-hole 31, the centrifugal force generated on the centrifugal member 4 is converted into a circumferential force that makes the rotational phase difference smaller.

[0102] <Stopper mechanism>

[0103] The torque variation suppression device 10 further has a stopper mechanism 8. The stopper mechanism 8 limits the relative rotation angle range of the hub flange 2 and the inertia ring 3. The stopper mechanism 8 has a protruding portion 81 and a recessed portion 82.

[0104] The protrusion 81 protrudes radially inward from the inertia block 34. The recess 82 is formed on the outer peripheral surface of the hub flange 2. The protrusion 81 is disposed within the recess 82. By abutting against the end face of the protrusion 81 and the recess 82, the range of relative rotation angle between the hub flange 2 and the inertia ring 3 is limited.

[0105] [Operation of torque variation suppression device 10]

[0106] use Figure 7 and Figure 8 The operation of the torque variation suppression device 10 will be explained.

[0107] When the lock is open, the torque transmitted to the front cover 11 is transmitted to the hub flange 2 via the input side rotating body 131 and the damper 132.

[0108] When there is no torque variation during torque transmission, Figure 7 In the indicated state, the hub flange 2 and the inertia ring 3 rotate. In this state, the cam follower 62 of the cam mechanism 6 abuts against the innermost radial position (the central position in the circumferential direction) of the cam surface 61. Furthermore, in this state, the rotational phase difference between the hub flange 2 and the inertia ring 3 is "0".

[0109] As mentioned above, the circumferential relative displacement between the hub flange 2 and the inertia ring 3 is called the "rotational phase difference," but... Figure 7 and Figure 8 In this context, these represent the offset of the circumferential center position of the centrifugal element 4 and the cam surface 61 from the center position of the second through hole 31.

[0110] Here, if there is torque variation during torque transmission, then as follows: Figure 8 As shown, a rotational phase difference θ is generated between the hub flange 2 and the inertial ring 3.

[0111] like Figure 8 As shown, when a rotational phase difference θ occurs between the hub flange 2 and the inertia ring 3, the cam follower 62 of the cam mechanism 6 moves from... Figure 7 Move to the position shown Figure 8 The position is shown. At this time, the cam follower 62 moves relatively to the left while rolling on the cam surface 61. In addition, the cam follower 62 also rolls on the inner wall surface of the second through hole 31. Specifically, the large diameter portion 621 of the cam follower 62 rolls on the cam surface 61, and the small diameter portion 622 of the cam follower 62 rolls on the inner wall surface of the second through hole 31. In addition, the cam follower 62 rotates counterclockwise.

[0112] By moving the cam follower 62 to the left, the cam follower 62, via the cam surface 61, moves the centrifugal member 4 radially inward.Figure 7 and Figure 8 Press down on the lower side to move the centrifugal element 4 radially inward. As a result, the centrifugal element 4 moves from... Figure 7 Move to the position shown Figure 8 The position is shown. At this time, the centrifugal member 4 rolls on the second guide surface 212. The centrifugal member 4 rotates clockwise. In addition, due to the clockwise rotation of the centrifugal member 4, the first rolling member 5 rotates counterclockwise. In addition, the first rolling member 5 rolls on the first guide surface 211 and moves radially inward.

[0113] Thus, due to the centrifugal force acting on the object moving towards... Figure 8 The centrifugal element 4 is positioned on the centrifugal component 4, therefore the centrifugal element 4 is radially outward ( Figure 8 The centrifugal member 4 moves (upper side). Specifically, the centrifugal member 4 rolls on the second guide surface 212 and moves radially outward. In addition, the centrifugal member 4 rotates counterclockwise. Thus, by the counterclockwise rotation of the centrifugal member 4, the first rolling member 5 rotates clockwise. In addition, it rolls on the first guide surface 211 and moves radially outward.

[0114] Furthermore, the cam surface 61 formed on the centrifugal member 4 directs the inertial ring 3 to the centrifugal member 4 via the cam follower 62. Figure 8 Press on the right side to make the inertial ring 3 oriented Figure 7 The cam follower 62 moves to the right. At this time, the large-diameter portion 621 of the cam follower 62 rolls on the cam surface 61, and the small-diameter portion 622 of the cam follower 62 rolls on the inner wall surface of the second through hole 31. Additionally, the cam follower 62 rotates clockwise. As a result, it returns to... Figure 8 The state.

[0115] Furthermore, when a rotational phase difference is generated in the opposite direction, the cam follower 62 moves relative to the cam surface 61. Figure 9 It moves to the right, but the operating principle is the same. At this time, the centrifugal component 4 rolls on the first guide surface 211 via the first rolling component 5.

[0116] As described above, when a rotational phase difference arises between the hub flange 2 and the inertia ring 3 due to torque variation, the hub flange 2 is subjected to a circumferential force that reduces the rotational phase difference between the two components through the centrifugal force acting on the centrifugal member 4 and the action of the cam mechanism 6. This force suppresses torque variation. Furthermore, the force is transmitted between the centrifugal member 4 and the inertia ring 3 via the cam follower 62.

[0117] The force that suppresses the above torque fluctuations varies depending on the centrifugal force, i.e., the rotational speed of the hub flange 2, and also varies depending on the rotational phase difference and the shape of the cam surface 61. Therefore, by appropriately setting the shape of the cam surface 61, the characteristics of the torque fluctuation suppression device 10 can be made to be optimal for engine specifications, etc.

[0118] Furthermore, the centrifugal member 4 moves radially by rolling indirectly or directly on the first guide surface 211 or the second guide surface 212. Therefore, compared to sliding on the first guide surface 211 or the second guide surface 212, the centrifugal member 4 can move radially more smoothly. In addition, the cam follower 62 rolls on the cam surface 61 and the inner wall surface of the second through hole 31. Therefore, force can be transmitted more smoothly between the centrifugal member 4 and the inertia ring 3.

[0119] [Examples of characteristics]

[0120] Figure 9 This is a diagram illustrating an example of the characteristics of the torque variation suppression device 10. The horizontal axis represents rotational speed, and the vertical axis represents torque variation (rotational speed variation). Characteristic Q1 indicates the case where no device for suppressing torque variation is provided, characteristic Q2 indicates the case where a conventional dynamic damper device without a cam mechanism is provided, and characteristic Q3 indicates the case where the torque variation suppression device 10 of this embodiment is provided.

[0121] Depend on Figure 10 It can be seen that in the device with a dynamic damper device that does not have a cam mechanism (characteristic Q2), torque variation can be suppressed only in a specific speed range. On the other hand, in this embodiment with a cam mechanism 6 (characteristic Q3), torque variation can be suppressed in all speed ranges.

[0122] [Variation Example]

[0123] This invention is not limited to the above embodiments, and various modifications or alterations can be made without departing from the scope of this invention.

[0124] <Variation Example 1>

[0125] The centrifugal component 4 may not be circular. For example, the portion of the centrifugal component 4 other than the first and second contact surfaces 42a and 42b may not be arc-shaped when viewed from the main view.

[0126] <Variation Example 2>

[0127] The cam follower 62 can also be mounted on the second through hole 31 via a bearing component.

[0128] <Variation Example 3>

[0129] In the above embodiment, the centrifugal element 4 is configured to rotate as a whole, but the structure of the centrifugal element 4 is not limited to this; it can also be configured so that only a portion of the centrifugal element 4 rotates. For example, as... Figure 11 As shown, the centrifuge component 4 has a centrifuge component main body 43, a plurality of first rotating parts 44a, and a plurality of second rotating parts 44b. Furthermore, in this modified example, the number of first rotating parts 44a and second rotating parts 44b are two each.

[0130] The centrifugal member main body portion 43 includes a first end portion 431 and a second end portion 432 in the circumferential direction. The first end portion 431 is disposed on the first guide surface 211 side, and the second end portion 432 is disposed on the second guide surface 212 side. The centrifugal member main body portion 43 is composed of a pair of plates. The plurality of first rotation portions 44a and the second rotation portion 44b are sandwiched by the pair of plates in the axial direction. It is preferable that the centrifugal member main body portion 43 not contact the hub flange 2.

[0131] The first rotation portion 44a is rotatably mounted on the first end portion 431 of the centrifugal member main body portion 43. That is, the first rotation portion 44a is configured to rotate on its own axis. The first rotation portion 44a is disposed apart from the first guide surface 211.

[0132] The second rotation portion 44b is rotatably mounted on the second end portion 432 of the centrifugal member main body portion 43. That is, the second rotation portion 44b is configured to rotate on its own axis. The second rotation portion 44b is disposed apart from the second guide surface 212.

[0133] The first rolling member 5a is disposed between the first guide surface 211 and the centrifugal member 4. In detail, the first rolling member 5a is disposed between the first guide surface 211 and the first rotation portion 44a. The first rolling member 5a contacts the first guide surface 211 and the first rotation portion 44a. The diameter of the first rolling member 5a is larger than the gap between the first rotation portion 44a and the first guide surface 211.

[0134] The first rolling member 5a rolls on the first guide surface 211 by the rotation of the centrifugal member 4. In detail, the first rolling member 5a rolls on the first guide surface 211 by the rotation of the first rotation portion 44a.

[0135] The second rolling member 5b is disposed between the second guide surface 212 and the centrifugal member 4. In detail, the second rolling member 5b is disposed between the second guide surface 212 and the second rotation portion 44b. The second rolling member 5b contacts the second guide surface 212 and the second rotation portion 44b. The diameter of the second rolling member 5b is larger than the gap between the second rotation portion 44b and the second guide surface 212.

[0136] The second rolling member 5b rolls on the second guide surface 212 by the rotation of the centrifugal member 4. In detail, the second rolling member 5b rolls on the second guide surface 212 by the rotation of the second rotation portion 44b.

[0137] <Modification 4>

[0138] In the above-described embodiment, the centrifugal member 4 is provided on the hub flange 2, but the centrifugal member 4 can be provided on the inertia ring 3. In this case, the inertia ring 3 corresponds to the first rotating body of the present application, and the hub flange 2 corresponds to the second rotating body of the present application.

[0139] <Variation Example 5>

[0140] In the above embodiment, the hub flange 2 is shown as an example of the first rotating body, but the first rotating body is not limited to this. For example, when the torque fluctuation suppression device is installed on the torque converter as in this embodiment, the front cover 11 of the torque converter 100 or the input side rotating body 131 can be used as the first rotating body.

[0141] <Variation Example 6>

[0142] In the above embodiment, the torque variation suppression device 10 is installed on the torque converter 100, but the torque variation suppression device 10 can also be installed on other power transmission devices such as the clutch device.

[0143] For example, such as Figure 12 As shown, a torque fluctuation suppression device 10 can be installed on the damper device 101. This damper device 101 is installed, for example, in a hybrid vehicle. The damper device 101 includes an input component 141, an output component 142, a damper 143, and the torque fluctuation suppression device 10. Torque from the drive source is input to the input component 141. The damper 143 is disposed between the input component 141 and the output component 142. The output component 142 transmits the torque from the input component 141 via the damper 143. The torque fluctuation suppression device 10 is installed, for example, on the output component 142.

[0144] <Variation Example 7>

[0145] Figure 12 This is an enlarged front view of the torque variation suppression device 10 with one side of the inertia ring 3, centrifugal component 4, and first rolling component 5 removed. Figure 13 As shown, the receiving part 21 has a first guide surface 211, a second guide surface 212, a bottom surface 213 and a connecting surface 214.

[0146] Connecting surface 214 connects the first guide surface 211 and the bottom surface 213. Connecting surface 214 is oriented circumferentially and radially. Connecting surface 214 is a curved surface. Specifically, connecting surface 214 is a concave curved surface. Connecting surface 214 is arc-shaped when viewed axially. Preferably, the radius of curvature of connecting surface 214 is greater than the radius of the first rolling member 5. Additionally, as... Figure 14 As shown, the connecting surface 214 can also be a plane.

[0147] Since the connecting surface 214 is located radially inside the first rolling member 5, it is possible to suppress the falling sound when the first rolling member 5 falls radially inward due to its own weight. In addition, in the modified example 7, the limiting groove 33 is not formed on the inertial ring 3.

[0148] <Variation Example 8>

[0149] In the above embodiment, the first through-hole 41 of the centrifugal member 4 is a perfect circle when viewed in the axial direction, but the shape of the first through-hole 41 is not limited thereto. For example, as shown in FIG. 12, the first through-hole 41 of the centrifugal member 4 can also not be a perfect circle when viewed in the axial direction. Hereinafter, a detailed description will be given. Figure 14

[0150] As shown in FIG. 12, the inner wall surface of the first through-hole 41 constitutes a cam surface 61. The cam surface 61 faces toward the radially outer side. When the torque variation suppression device 10 is operating, the cam surface 61 abuts against a cam follower 62 by the centrifugal member 4 moving to the radially outer side. In detail, the cam surface 61 abuts against a large-diameter portion 621 of the cam follower 62. Figure 14

[0151] The cam surface 61 has a first region 611 and a second region 612. The first region 611 is a region that abuts against the cam follower 62 when the centrifugal member 4 rolls on the first guide surface 211 via the first rolling member 5. For example, when the inertia ring 3 relatively rotates clockwise with respect to the hub flange 2, the first region 611 abuts against the cam follower 62. That is, the first region 611 is a region from the most radially inner portion of the cam surface 61 to the right side of the first guide surface 211. Figure 14

[0152] The second region 612 is a region that abuts against the cam follower 62 when the centrifugal member 4 rolls on the second guide surface 212. For example, when the inertia ring 3 relatively rotates counterclockwise with respect to the hub flange 2, the second region 612 abuts against the cam follower 62. That is, the second region 612 is a region from the most radially inner portion of the cam surface 61 to the left side of the second guide surface 212. Figure 15

[0153] The first region 611 has a different curved surface shape from the second region 612. The first region 611 and the second region 612 are circular arc shapes when viewed in the axial direction. In this modification, the first region 611 has a smaller radius of curvature than the radius of curvature of the second region 612.

[0154] In addition, in this modification, the right half of the first through-hole 41 is a semicircular shape when viewed in the axial direction, and the left half of the first through-hole 41 is also a semicircular shape. The semicircle that constitutes the right half of the first through-hole 41 has a smaller radius than the radius of the semicircle that constitutes the left half of the first through-hole 41 when viewed in the axial direction. That is, the first through-hole 41 is constituted by two semicircles having different radii when viewed in the axial direction.

[0155] ​​​​The boundary between the first region 611 and the second region 612 is a portion located most radially inward. When the hub flange 2 and the inertial ring 3 rotate integrally without rotating relative to each other, that is, when the rotational phase difference θ of the hub flange 2 and the inertial ring 3 is zero, the boundary between the first region 611 and the second region 612 abuts against the cam follower 62.

[0156] In addition, the state of the centrifugal member 4 in which the boundary between the first region 611 and the second region 612 abuts against the cam follower 62 like this is referred to as a neutral state. That is, when the centrifugal member 4 is in the neutral state, the boundary between the first region 611 and the second region 612 abuts against the cam follower 62.

[0157] Figure 15 is a front view of the torque variation suppression device in a state in which the centrifugal member 4, the first rolling member 5, and the cam follower 62 are removed. As shown in Figure 15 , the second through-hole 31 can also be a shape that is not a perfect circle when viewed in the axial direction.

[0158] The inner wall surface of the second through-hole 31 constitutes an abutment surface 30. The abutment surface 30 faces the radially inner side. The abutment surface 30 abuts against the cam follower 62. In addition, the abutment surface 30 abuts against the cam follower 62 when the torque variation suppression device 10 is operating and when the torque variation suppression device 10 is stopped. In detail, the abutment surface 30 abuts against the small-diameter portion 622 of the cam follower 62.

[0159] The abutment surface 30 has a third region 301 and a fourth region 302. The third region 301 is a region that abuts against the cam follower 62 when the centrifugal member 4 rolls on the first guide surface 211 via the first rolling member 5. For example, when the inertial ring 3 rotates relative to the hub flange 2 clockwise, the third region 301 abuts against the cam follower 62. That is, the third region 301 is a region from the portion of the abutment surface 30 that is most radially outward to the left side of the second guide surface 212. Figure 15

[0160] The fourth region 302 is a region that abuts against the cam follower 62 when the centrifugal member 4 rolls on the second guide surface 212. For example, when the inertial ring 3 rotates relative to the hub flange 2 counterclockwise, the fourth region 302 abuts against the cam follower 62. That is, the fourth region 302 is a region from the portion of the abutment surface 30 that is most radially outward to the right side of the first guide surface 211. Figure 14

[0161] The third region 301 has a different curved surface shape than the fourth region 302. The third region 301 and the fourth region 302 are circular arc shapes when viewed in the axial direction. In this modification, the third region 301 has a larger radius of curvature than the radius of curvature of the fourth region 302.

[0162] ​​Furthermore, in this modified example, when viewed axially, the right half of the second through hole 31 is semi-circular, and the left half of the second through hole 31 is also semi-circular. When viewed axially, the semi-circle constituting the right half of the second through hole 31 has a smaller radius than the semi-circle constituting the left half of the second through hole 31. That is, when viewed axially, the second through hole 31 is composed of two semi-circles with different radii.

[0163] The boundaries of the third region 301 and the fourth region 302 are located on the outermost radial side. When the centrifugal component 4 is in a neutral state, the centrifugal component 4 abuts against the boundaries of the third region 301 and the fourth region 302.

[0164] like Figure 16 As shown, the torque variation suppression device 10 includes a state maintenance mechanism 7. When the hub flange 2 and the inertia ring 3 rotate as a unit, that is, when the rotational phase difference θ is zero, the state maintenance mechanism 7 is configured to maintain the neutral state of the centrifugal member 4. Therefore, when the rotational phase difference θ is zero, the boundaries of the first region 611 and the second region 612 are in contact with the cam follower 62.

[0165] The state maintenance mechanism 7 has a first engaging portion 71 and a second engaging portion 72. The first engaging portion 71 is formed on the hub flange 2. The first engaging portion 71 protrudes from the hub flange 2 toward the centrifugal member 4.

[0166] A second engaging portion 72 is formed on the centrifugal member 4. The second engaging portion 72 is a recess formed on the centrifugal member 4. The second engaging portion 72 engages with the first engaging portion 71. Specifically, the first engaging portion 71 is disposed within the second engaging portion 72. Therefore, the first engaging portion 71 and the second engaging portion 72 abut against each other, and as a result, the rotation of the centrifugal member 4 is restricted when the hub flange 2 and the inertia ring 3 are not rotating relative to each other.

[0167] The operation of the torque variation suppression device 10 will now be explained. First, as... Figure 17 As shown, when the hub flange 2 and the inertia ring 3 do not rotate relative to each other, that is, when the rotational phase difference θ is zero, the centrifugal element 4 is in a neutral state. Therefore, the cam follower 62 abuts against the boundaries of the first region 611 and the second region 612. In addition, the cam follower 62 abuts against the boundaries of the third region 301 and the fourth region 302. The centrifugal element 4 does not rotate.

[0168] like Figure 18 As shown, when the inertial ring 3 rotates counterclockwise relative to the hub flange 2, the centrifugal element 4 rolls on the second guide surface 212. Additionally, the centrifugal element 4 rolls clockwise.

[0169] The cam follower 62 rolls on the second region 612 in the cam surface 61. In addition, the cam follower 62 rolls on the fourth region 302 in the abutment surface 30. In this way, the cam follower 62 is sandwiched by the second region 612 and the fourth region 302. In addition, the cam follower 62 rolls counterclockwise.

[0170] As shown in FIG. 6, when the inertia ring 3 relatively rotates clockwise with respect to the hub flange 2, the centrifugal member 4 rolls on the first guide surface 211 via the first rolling member 5. In addition, the centrifugal member 4 rolls clockwise. Figure 19 The cam follower 62 rolls on the first region 611 in the cam surface 61. In addition, the cam follower 62 rolls on the third region 301 in the abutment surface 30. In this way, the cam follower 62 is sandwiched by the first region 611 and the third region 301. In addition, the cam follower 62 rolls clockwise.

[0171] Here, the centrifugal member 4 does not directly roll on the first guide surface 211, but rolls on the first guide surface 211 via the first rolling member 5. Therefore, if the curvature radius of the first region 611 is made the same as the curvature radius of the second region 612, the angle formed by the first tangent and the second tangent can deviate from an appropriate range. As a result, there is a possibility that the cam follower 62 cannot be firmly sandwiched by the abutment surface 30 and the cam surface 61. In addition, the first tangent refers to a tangent at a contact point of the cam follower 62 with the cam surface 61, and the second tangent refers to a tangent at a contact point of the cam follower 62 with the abutment surface 30.

[0172] On the contrary, in the present modified example, since the first region 611 has a different curvature radius from the second region 612, specifically, the curvature radius of the first region 611 is made smaller than the curvature radius of the second region 612, it is possible to make the angle formed by the first tangent and the second tangent within an appropriate range, and firmly sandwich the cam follower 62 by the cam surface 61 and the abutment surface 30.

[0173] In addition, in the present modified example, since the third region 301 has a different curvature radius from the fourth region 302, specifically, the curvature radius of the third region 301 is made larger than the curvature radius of the fourth region 302, it is possible to make the angle formed by the first tangent and the second tangent within an appropriate range, and firmly sandwich the cam follower 62 by the cam surface 61 and the abutment surface 30.

[0174] In addition, as shown in FIG. 6, the third region 301 and the fourth region 302 have different curved surface shapes, on the other hand, the first region 611 and the second region 612 can also be the same curved surface shape. In addition, as shown in FIG. 6, the third region 301 and the fourth region 302 have different curved surface shapes, on the other hand, the first region 611 and the second region 612 can also be the same curved surface shape.

[0175] Figure 20 In addition, as shown in FIG. 6, the third region 301 and the fourth region 302 have different curved surface shapes, on the other hand, the first region 611 and the second region 612 can also be the same curved surface shape. In addition, as shown in FIG. 6, the third region 301 and the fourth region 302 have different curved surface shapes, on the other hand, the first region 611 and the second region 612 can also be the same curved surface shape. ​ ​As shown, the first region 611 and the second region 612 have different curved surface shapes, and on the other hand, the third region 301 and the fourth region 302 can also be the same curved surface shape.

Claims

1. A rotating device comprising: a first rotating body having a housing portion including a first guide surface and a second guide surface in a circumferential direction, the first rotating body being disposed in a rotatable manner; a second rotating body disposed so as to be able to rotate together with the first rotating body and be able to rotate in opposition to the first rotating body; a centrifugal member disposed in the housing portion in a manner so as to be able to move in a radial direction due to a centrifugal force generated by rotation of the first rotating body or the second rotating body, and configured to self-rotate when moving in the radial direction; a first rolling member disposed between the first guide surface and the centrifugal member, and configured to roll on the first guide surface by self-rotation of the centrifugal member; and a second rolling member disposed between the second guide surface and the centrifugal member, and configured to roll on the second guide surface by self-rotation of the centrifugal member, wherein the centrifugal member has: a centrifugal member main body portion including a first end portion and a second end portion in the circumferential direction; a first rotating portion rotatably mounted to the first end portion of the centrifugal member main body portion; and a second rotating portion rotatably mounted to the second end portion of the centrifugal member main body portion, wherein the first rolling member is disposed between the first guide surface and the first rotating portion, and rolls on the first guide surface by self-rotation of the first rotating portion, and wherein the second rolling member is disposed between the second guide surface and the second rotating portion, and rolls on the second guide surface by self-rotation of the second rotating portion.

2. The rotating device according to claim 1, wherein the centrifugal member is configured to roll on the second guide surface.

3. The rotating device according to claim 2, wherein the centrifugal member and the first rolling member are cylindrical, and wherein a distance between the first guide surface and the second guide surface is smaller than a sum of a diameter of the centrifugal member and a diameter of the first rolling member.

4. The rotating device according to any one of claims 1 to 3, further comprising a cam mechanism that converts a centrifugal force acting on the centrifugal member into a circumferential force in a direction in which a phase difference in rotation of the first rotating body and the second rotating body is reduced, wherein the cam mechanism has: a cam surface formed on the centrifugal member; and a cam follower that abuts against the cam surface and transmits a force between the centrifugal member and the second rotating body.

5. The rotating device according to claim 4, wherein the cam follower rolls on the cam surface.

6. The rotating device according to claim 4, wherein the centrifugal member has a first through-hole that penetrates in an axial direction, and wherein the cam surface is constituted by an inner wall surface of the first through-hole.

7. The rotating device according to claim 4, wherein the cam follower is rotatably mounted to the second rotating body.

8. The rotating device according to claim 4, wherein the second rotating body has a second through-hole, and wherein the cam follower rolls on an inner wall surface of the second through-hole.

9. The rotating device according to claim 4, wherein the cam follower is a cylindrical or cylindrical roller. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 10. The rotary device according to claim 2, wherein the rotary device further comprises a cam follower that is cylindrical or cylindrical, the centrifugal member has a first through-hole that extends in the axial direction, the second rotary body has a second through-hole that extends in the axial direction, an inner wall surface of the first through-hole constitutes a cam surface that faces the radial direction outward and abuts against the cam follower, an inner wall surface of the second through-hole constitutes an abutment surface that faces the radial direction inward and abuts against the cam follower, the cam surface has: a first region that abuts against the cam follower when the centrifugal member rolls on the first guide surface via the first rolling member; and a second region that abuts against the cam follower when the centrifugal member rolls on the second guide surface, and the first region has a different curved surface shape than the second region.

11. The rotary device according to claim 10, wherein the first region has a smaller radius of curvature than the radius of curvature of the second region.

12. The rotary device according to claim 10 or 11, wherein the abutment surface has: a third region that abuts against the cam follower when the centrifugal member rolls on the first guide surface via the first rolling member; and a fourth region that abuts against the cam follower when the centrifugal member rolls on the second guide surface, and the third region has a different curved surface shape than the fourth region.

13. The rotary device according to claim 2, wherein the rotary device further comprises a cam follower that is cylindrical or cylindrical, the centrifugal member has a first through-hole that extends in the axial direction, the second rotary body has a second through-hole that extends in the axial direction, an inner wall surface of the first through-hole constitutes a cam surface that faces the radial direction outward and abuts against the cam follower, an inner wall surface of the second through-hole constitutes an abutment surface that faces the radial direction inward and abuts against the cam follower, the abutment surface has: a third region that abuts against the cam follower when the centrifugal member rolls on the first guide surface via the first rolling member; and a fourth region that abuts against the cam follower when the centrifugal member rolls on the second guide surface, and the third region has a different curved surface shape than the fourth region.

14. The rotary device according to claim 12, wherein the third region has a larger radius of curvature than the radius of curvature of the fourth region.

15. The rotary device according to claim 10 or 11, wherein the rotary device further comprises a state maintaining mechanism that is configured to maintain a state of the centrifugal member in a manner in which a boundary between the first region and the second region contacts the cam follower when the first rotary body and the second rotary body rotate integrally without rotating relative to each other.

16. The rotary device according to claim 15, wherein the state maintaining mechanism has: a first engagement portion that is formed in the first rotary body; and a second engagement portion that is formed in the centrifugal member and engages with the first engagement portion. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 17. The rotary device according to any one of claims 1 to 3, wherein the second rotary body has a restriction groove, the first rolling member is supported by the restriction groove.

18. The rotary device according to any one of claims 1 to 3, wherein the housing portion has: a bottom surface facing a radially outer side; and a linking surface linking the first guide surface and the bottom surface.

19. The rotary device according to claim 18, wherein the linking surface is a curved surface.

20. The rotary device according to claim 18, wherein the linking surface is a flat surface.

21. A power transmission device, comprising: an input member; an output member to which a torque is transmitted from the input member; the rotary device according to any one of claims 1 to 20.

Images