Patent ID: 8663021
Filing Date: 2014-03-04
Classification: F16F

Abstract:
1. A torque fluctuation absorber, comprising: a first rotating member arranged to be rotatable; a second rotating member arranged in a rotatable manner relative to the first rotating member; a coil spring for buffering a torsion between the first rotating member and the second rotating member by means of an elastic force; and a cushion member arranged at an inside of the coil spring and buffering the torsion between the first rotating member and the second rotating member by means of an elastic force, wherein the cushion member includes an elastic member formed in a columnar shape, and an abrasion resistant member partly covering a side surface of the elastic member and including a greater abrasion resistance than an abrasion resistance of the elastic member, the abrasion resistant member includes a first abrasion resistant member provided at a first end of the elastic member and a second abrasion resistant member provided at a second end of the elastic member while being apart from the first abrasion resistant member, and the elastic member includes a first recessed portion formed at an outer circumferential surface of an intermediate portion between the first abrasion resistant member and the second abrasion resistant member and the first recessed portion is recessed inwardly continuously along the entire circumference of the elastic member.