Patent ID: 7377853

Claim:
A torque fluctuation absorbing device comprising: a damping mechanism connected with an input shaft of a transmission and having an approximately annular-shaped frictional member, which is fixed to both surfaces of a disc disposed at an outer peripheral portion of the disc; a flywheel rotated by a driving power source and transmitting driving force from the driving power source to the input shaft through the damping mechanism in order to rotate the input shaft; a first plate rotated with the flywheel and abutting on a first surface of the frictional member; a second plate abutting on a second surface of the frictional member; a coned disk spring for biasing the second plate against the frictional member; a supporting member rotated with the first plate and supporting the coned disk spring; and a plurality of fixation members for fixing the first plate with the supporting member, wherein the first plate includes a reinforcement portion which reinforces rigidity of the first plate at an outer circumference portion located radially outwardly relative to the frictional member; wherein the reinforcement portion is a stepped portion in which opposite surfaces of the first plate are stepped outwardly away from the flywheel, the stepped portion being formed at a region between an outer circumference of the frictional surface of the first plate and the fixation members.