| 摘要 |
PROBLEM TO BE SOLVED: To provide a torsional vibration attenuating device capable of improving durability of a rolling element and a rolling surface.SOLUTION: In a torsional vibration attenuating device, a rolling surface 4 is formed on an outer periphery of a rotor 1 rotating under torque. The torsional vibration attenuating device comprises a rolling element 3 made into contact with the rolling surface 4 by a centrifugal force generated by rotation together with the rotor 1 and moving forward and backward along the rolling surface 4 by varying the torque. The rolling surface 4 comprises: a first rolling surface 4a contacting the rolling element 3 by the centrifugal force and moving forward and backward by varying the torque; and a second rolling surface 4b contacting the rolling element 3 together with the first rolling surface 4a by the centrifugal force, and moving forward and backward by varying the torque when a rotation number of the rotor 1 is larger than a predefined rotation number Nk. |
