| 摘要 |
To provide a simply-structured vibration damping device having excellent vibration damping capacity. A vibration damping device is configured to damp torsional vibrations of a rotary member of a hydraulic transmission 1, in which the rotary member is rotated integrally with a drive side impeller 2 or with a driven side impeller 5, and in which the drive side impeller 2 and the driven side impeller 5 are connected with a lockup clutch 26 actuated by fluid pressure. The vibration damping device comprises: a holding chamber 24 rotated integrally with the driven side impeller 5; a rolling member 25 held in the holding chamber 24, which is rotated in a rotational direction of the driven side impeller 5 but allowed to rotate relatively with the driven side impeller 5; and a movable member 23 configured to lock the rolling member 25 in the holding chamber 24 when actuated by the fluid pressure for disengaging the lockup clutch 26, and to unlock the rolling member 25 in the holding chamber 24 when actuated by the fluid pressure for engaging the lockup clutch 26. |
