Friction clutch device for robotized gearbox of motor vehicle, has annular coaxial rear activation diaphragm constantly exerting axial prestressing effort towards front on ball bearing by using reaction plate

摘要

The device (10) has a reaction plate (22) mounted in rotation around a rotational axis (B) by using a ball bearing (24). An annular coaxial rear activation diaphragm (56) has flexible elastic fingers (60) displaceable between an extreme front clutch position and an extreme rear clutch position in which the fingers are elastically brought back. The diaphragm axially stresses a pressure plate (46) to lock a clutch plate (52) against the plate (22) in the front clutch position. The diaphragm constantly exerts axial prestressing effort towards the front on the bearing by using the plate (22).