| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a torsional vibration attenuation device which can prevent or suppress generation of noise caused by contact of a rolling body and an end if a rolling face due to an increase of an amplitude of the rolling body.SOLUTION: A torsional vibration attenuation device comprises: a rolling body 2 in which a rolling face 4 is formed at an external periphery of a rotating body 1, and which contacts with the rolling face 4 by a centrifugal force generated by rotating together with the rotating body 1, and reciprocates along the rolling face 4 by a variation of torque in a state that the rotating body 1 rotates. At an end side of the rolling face 4 in a circumferential direction of the rotating body 1, there is formed a constraint body 7 for constraining the rolling body 2 and releasing the constraint of the rolling body 2 when a force for moving the rolling body 2 by a centrifugal force generated at the rolling body 2 which is constrained at the end side of the rolling face 4 to a point P0 farthest from the center of the rotating body 1 in the rolling face 4 becomes larger than a force for constraining the rolling body 2.</p> |
