Patent ID: 9145947
Filing Date: 2015-09-29
Classification: F16F,F16H

Abstract:
1. A torsional vibration damping device comprising: a rotating body that rotates upon receiving a torque, wherein a first rolling contact surface that is curved with a center of curvature at a location offset from a rotation center of the rotating body is formed along a circumferential direction of the rotating body at a location offset from the rotation center of the rotating body in a radial direction; and a rolling element that is brought into contact with the first rolling contact surface by receiving a centrifugal force resulting from rotation with the rotating body and that rolls along the first rolling contact surface through torsional vibrations of the rotating body, wherein the rolling element includes a first rolling element that rolls along the first rolling contact surface and that is formed in a hollow shape, and a second rolling element that is arranged inside the first rolling element such that the second rolling element rolls along a second rolling contact surface formed inside the first rolling element.