| 摘要 |
A torsional damping mechanism (30, 32) disposed in a two mass flywheel assembly (24) for reducing the effects of driveline torsionals or vibrations. The assembly includes primary and secondary flywheel masses (26, 28), a viscous damper assembly having an annular housing assembly (46c, 50a) integrally formed with the primary flywheel mass, an annular clutch assembly defined by radially inner and outer clutching members (72, 74) disposed in the housing, and nested spiral wound springs (58, 60) disposed between an inner hub portion (46a) of the primary mass and a radially inner portion (28b) of the secondary mass. The inner clutching member (72) is driven by an axially extending hub portion (28c) of the secondary mass and the outer clutching member (74) is driven by the inner clutching member through a lost motion means defined by splines (72c, 74b). Radially outer ends (58b, 60b) of the spiral wound springs are retained against pivotal movement by fastening means (64, 66) to improve stress distribution in the springs and to reduce friction between the spiral coils of the springs. |
