Belleville spring for torque transmission device used for drive train of motor vehicle disc spring used in dual-mass flywheel, has base which is deviated from conical shape of base deformation portion

摘要

The spring (10) has annular base (11) which is provided with a radially inner edge portion (12) and a radially outer edge portion (13), and is formed conical in shape. The base is deviated from the conical shape of the base deformation portion. The annular peripheral deformation portions (14,15) are radially spaced from each other.