Patent ID: 8657693

Claim:
A torsional shock absorbing apparatus, comprising: a driving rotation member inputted with a rotational torque; a driven rotation member disposed in coaxial relationship with the driving rotation member to output the rotational torque of the driving rotation member; at least one or more resilient members provided between the driving rotation member and the driven rotation member to be compressed in the circumferential direction of the driving rotation member when the driving rotation member and the driven rotation member are relatively rotated with each other; a cam member having a cam surface formed in an oval shape and provided at one of the driving rotation member and the driven rotation member to be integrally rotated with the one of the driving rotation member and the driven rotation member; and at least one or more torque transmission members each disposed between the cam member and a corresponding one resilient member of the at least one or more resilient members to transmit the rotational torque of the driving rotation member to the driven rotation member, in which each of the at least one or more torque transmission members includes an arm member having one end portion held in contact with the cam surface of the cam member and the other end portion held in engagement with a circumferential one end portion of the corresponding one resilient member, the arm member being swingably supported on and around a swing fulcrum portion provided on another of the driving rotation member and the driven rotation member.