Damper device
A damper device includes: a first rotary body including a first plate rotating around a rotation shaft and a second plate disposed facing the first plate and integrally rotating with the first plate; a second rotary body rotating relative to the first rotary body; a control plate disposed between the first plate and the second rotary body in an axial direction and engaged with the second rotary body to rotate integrally therewith; a first thrust member a part of which is disposed between the first plate and the control plate in the axial direction and engaged with the first plate to rotate integrally therewith; and a second thrust member a part of which is disposed between the second plate and the second rotary body and engaged with the second plate to rotate integrally with the first rotary body.
1. A damper device comprising:
a first rotary body including at least a first plate that rotates around a rotation axis and a second plate that is disposed to face the first plate and integrally rotates with the first plate around the rotation axis;
a second rotary body that rotates relative to the first rotary body around the rotation axis;
a control plate that is disposed between the first plate and the second rotary body in an axial direction and is engaged with the second rotary body to rotate integrally with the second rotary body;
a first thrust member at least a part of which is disposed between the first plate and the control plate in the axial direction and that is engaged with the first plate to rotate integrally with the first rotary body around the rotation axis; and
a second thrust member at least a part of which is disposed between the second plate and the second rotary body in the axial direction and that is engaged with the second plate to rotate integrally with the first rotary body around the rotation axis, wherein
the first thrust member is biased by a biasing member supported by the first plate in a direction to be pressed against the control plate to generate a first frictional force between the first thrust member and the control plate,
the control plate is separated from the first plate in a case other than a specific state in which the second rotary body rotates relative to the first rotary body in a predetermined direction by a predetermined twist angle or more and abuts against and slides on the first plate in the specific state to generate a second frictional force between the control plate and the first plate, and
the second thrust member abuts against and slides on the second rotary body to generate a third frictional force between the second thrust member and the second rotary body.
2. The damper device according to claim 1 , wherein
the control plate includes
a claw portion that engages with the second rotary body,
a first sliding portion that abuts against and slides on the first plate to generate the second frictional force in the specific state,
a second sliding portion that abuts against and slides on the first thrust member to generate the first frictional force, and
a coupling portion that couples the claw portion with the first sliding portion.
3. The damper device according to claim 2 , wherein
a gap extending in a radial direction is provided between the second rotary body and the coupling portion.
4. The damper device according to claim 2 , wherein
the first sliding portion is disposed radially outward than the claw portion and the second sliding portion is disposed radially inward than the claw portion.
5. The damper device according to claim 2 , wherein
the first sliding portion has a first concave-convex surface that is uneven in the axial direction, and a second concave-convex surface corresponding to the first concave-convex surface is formed on a surface of the first plate that faces the first sliding portion.
6. The damper device according to claim 5 , wherein
the second concave-convex surface faces the first concave-convex surface and has a concave shape and a convex shape that are paired with a convex shape and a concave shape of the first concave-convex surface.
7. The damper device according to claim 2 , wherein
the second rotary body is formed with a window hole that accommodates an elastic body that elastically couples the first rotary body with the second rotary body, and a groove that guides the claw portion and engages with the control plate.