CN-121993546-A - Power transmission device

Abstract

The present application relates to a power transmission device for efficiently stabilizing a friction coefficient between a friction plate and a target component. The power transmission device is provided with a first rotating body, a second rotating body, a supporting member, an elastic member, and a first friction plate. The second rotating body is configured to be rotatable relative to the first rotating body. The support member is mounted to the second rotating body. The elastic member elastically connects the first rotating body and the second rotating body. The first friction plate has an outer sliding portion and an inner sliding portion. The outer sliding portion is disposed radially outward of the elastic member. The inner sliding portion is disposed radially inward of the elastic member. The inner sliding portion is disposed between the second rotating body and the support member in the axial direction. The outer sliding portion and the inner sliding portion generate friction force when the first friction plate and the second rotating body relatively rotate.

Inventors

• UEHARA HIROSHI

Assignees

• 爱思帝股份有限公司

Dates

Publication Date

20260508

Application Date

20251027

Priority Date

20241101

Claims (9)

1. 1. A power transmission device is provided with: A first rotating body; A second rotating body configured to be rotatable relative to the first rotating body; A support member attached to the second rotating body; An elastic member elastically connecting the first rotating body and the second rotating body, and A first friction plate having an outer sliding portion disposed radially outward of the elastic member and an inner sliding portion disposed radially inward of the elastic member and axially between the second rotating body and the support member, The outer sliding portion and the inner sliding portion generate friction force when the first friction plate and the second rotating body relatively rotate.
2. 2. The power transmission device according to claim 1, wherein, The power transmission device further includes a first restriction mechanism configured to restrict a range of relative rotation angles of the first friction plate and the first rotating body.
3. 3. The power transmission device according to claim 2, wherein, The first rotating body has a first window portion extending in a circumferential direction, The second rotating body has a second window portion extending in the circumferential direction, The elastic member is disposed in the first window portion and the second window portion, The first restraint mechanism is disposed radially outward of an inner peripheral edge of the first window portion.
4. 4. The power transmission device according to claim 1, wherein the power transmission device further comprises: A friction member disposed between the second rotating body and the support member and contacting the inner sliding portion, and And a biasing member that biases the friction member toward the inner slide portion.
5. 5. The power transmission device according to claim 4, wherein, The friction member is disposed between the first friction plate and the support member in an axial direction, The urging member is disposed between the support member and the friction member in the axial direction.
6. 6. The power transmission device according to claim 1, wherein, The second rotating body has: a first plate disposed on a first side in an axial direction with respect to the first rotating body, and A second plate disposed on a second side in the axial direction with respect to the first rotating body and configured to rotate integrally with the first plate, The first friction plate and the support member are disposed between the first plate and the first rotating body in an axial direction.
7. 7. The power transmission device according to claim 6, wherein the power transmission device further comprises: a side plate; Platen, and And a second friction plate mounted to the second plate and held by the side plate and the pressing plate in an axial direction.
8. 8. The power transmission device according to claim 6, wherein, The power transmission device further includes a friction member disposed between the first rotating body and the second plate in the axial direction, the friction member being configured to rotate integrally with the second plate and to abut against the first rotating body.
9. 9. The power transmission device according to claim 8, wherein, The power transmission device further includes a biasing member that biases the friction member toward the first rotating body.

Description

Power transmission device Technical Field The present invention relates to a power transmission device. Background A vibration damping device as an example of the power transmission device is provided for absorbing vibration of a prime mover such as an internal combustion engine. The power transmission device of patent document 1 absorbs vibration by a torsion spring, and suppresses occurrence of resonance by friction force generated by sliding of a friction plate and a wiper member or the like. Patent document 1 Japanese patent application laid-open No. 2019-203580 Disclosure of Invention In order to stabilize the friction coefficient between the friction plate and the target part, it is necessary to perform a process of relatively rotating the friction plate and the target part to slide against each other before using the power transmission device. The present invention aims to provide a power transmission device capable of efficiently stabilizing the friction coefficient between a friction plate and a target component. The power transmission device according to the first aspect includes a first rotating body, a second rotating body, a support member, an elastic member, and a first friction plate. The second rotating body is configured to be rotatable relative to the first rotating body. The support member is mounted to the second rotating body. The elastic member elastically connects the first rotating body and the second rotating body. The first friction plate has an outer sliding portion and an inner sliding portion. The outer sliding portion is disposed radially outward of the elastic member. The inner sliding portion is disposed radially inward of the elastic member. The inner sliding portion is disposed between the second rotating body and the support member in the axial direction. The outer sliding portion and the inner sliding portion generate friction force when the first friction plate and the second rotating body relatively rotate. According to this configuration, the first friction plate is supported by the second rotating body and the supporting member, and therefore the first friction plate, the second rotating body, and the supporting member subassembly (subsuby) can be made into a unit. Further, the outer sliding portion and the inner sliding portion of the first friction plate generate friction force when rotating relative to the second rotating body. Therefore, the friction force can be generated by rotating the first friction plate in a state of the subassembly in which the first friction plate, the second rotating body, and the support member are assembled. Therefore, the process of stabilizing the friction coefficient between the first friction plate and the target component can be efficiently performed. In the power transmission device according to the first aspect, the power transmission device according to the second aspect further includes a first restraint mechanism. The first constraining mechanism is configured to constrain a range of relative rotation angles of the first friction plate and the first rotating body. In the power transmission device according to the second aspect, the power transmission device according to the third aspect is configured as follows. The first rotating body has a first window portion extending in a circumferential direction. The second rotating body has a second window portion extending in the circumferential direction. The elastic member is disposed in the first window portion and the second window portion. The first restraint mechanism is disposed radially outward of the inner periphery of the first window portion. In the power transmission device according to any one of the first to third aspects, the power transmission device according to the fourth aspect further includes a friction member and a biasing member. The friction member is disposed between the second rotating body and the support member. The friction member is in contact with the inner sliding portion. The urging member urges the friction member toward the inner sliding portion. In the power transmission device according to the fourth aspect, the power transmission device according to the fifth aspect is configured as follows. The friction member is disposed between the first friction plate and the support member in the axial direction. The urging member is disposed between the support member and the friction member in the axial direction. In the power transmission device according to any one of the first to fifth aspects, the power transmission device according to the sixth aspect is configured as follows. The second rotating body has a first plate and a second plate. The first plate is disposed on a first side in the axial direction with respect to the first rotating body. The second plate is disposed on a second side in the axial direction with respect to the first rotating body. The second plate is configured to rotate integrally with the first plate. The first friction plate an