Patent ID: 6287205
Filing Date: 2001-09-11
Classification: F16D,F16F

Abstract:
A dual mass damping flywheel for coupling an internal combustion engine (100) in rotation to an input member (101) of a transmission system, in particular one intended for a motor vehicle, comprising a primary flywheel (12) having a transverse element (14) which is adapted to be coupled in rotation to the internal combustion engine (100), a secondary flywheel (13) comprising, firstly, a reaction plate (16) with a friction face (17) adapted to be coupled releasably to the input member (101) of the transmission system for rotation therewith, and secondly, an internal hub (18) surrounded by the reaction plate (16) and mounted rotatably on the primary flywheel (12), with resilient members (24, 25) operatively interposed between the transverse element (14) of the primary flywheel (12) and the internal hub (18) of the secondary flywheel (13), and with a torque limiter (19) being interposed operatively between the reaction plate (16) and the internal hub (18), wherein the torque limiter (19) is provided with axially acting resilient means (70) and includes, firstly, a ring portion (160) fixed with respect to the reaction plate (16) and extending radially inwards of the friction face (17) of the reaction plate (16), and secondly, an annular groove (10) for receiving the said ring portion (160), this groove being bounded by a first flank (181) fixed with respect to the internal hub (18), a second flank (281) which is part of a friction ring (280) which is rotatable with the internal hub (18), and a base (183, 283), characterised in that the internal ring portion (160, 160') is carried on the reaction plate (16) and is of a different material.