Patent ID: 8562447
Filing Date: 2013-10-22
Classification: F16D,F16F

Abstract:
1. A torsional shock absorbing apparatus, comprising: a first rotation member having spring accommodating windows formed therein, a second rotation member disposed in coaxially rotatable relationship with the first rotation member and having spring accommodating portions positioned in face-to-face relationship with the first rotation member, springs partly disposed in the spring accommodating windows and the spring accommodating portions and compressed in response to the positive and negative torsional movements of the first rotation member with respect to the second rotation member to have the torque transmitted between the first rotation member and the second rotation member, a first seat member and a second seat member respectively disposed between the circumferentially end portions of the springs and the circumferentially end portions of the spring accommodating windows and the coil spring accommodating portions, for supporting circumferentially end surfaces of the springs respectively, the first seat member having an outer peripheral portion movable along the coil spring accommodating portion of the second rotation member in response to the positive torsional movement of the first rotation member with respect to the second rotation member, and the second seat member having an outer peripheral portion movable along the coil spring accommodating portion of the second rotation member in response to the negative torsional movement of the first rotation member with respect to the second rotation member, the first seat member and the coil spring accommodating portion having a sliding resistance to be generated therebetween, and the second seat member and the coil spring accommodating portion having a sliding resistance to be generated therebetween, the sliding resistance of the first seat member and the coil spring accommodating portion being larger than the sliding resistance of the second seat member and the coil spring accommodating portion.