Damper disc of a long travel type

摘要

A damper disc of a long travel type has a hub adapted to be connected to an output shaft; circumferentially spaced flanges projecting radially outwardly from the outer periphery of the hub; a pair of side plates connected to a torque input portion, disposed at both sides of the flanges and rotatably fitted around the hub; spacers circumferentially spaced to the flanges; sub-plates rigidly holding the spacers and rotatably fitted around portions of the hub between the side plates and the flanges; a first friction member having a small friction force and disposed between the flange and the sub-plate; a second friction member having a large friction force and disposed between the sub-plate and the side plate; a first spring always circumferentially connecting the flange and the side plates; a second spring adapted to circumferentially connect the flange and the spacers in a second torsion operation in which a relative torsion angle between the flange and the side plates is larger than a predetermined value; and a third spring adapted to connect the spacers and the side plate at least in the second torsion operation.