Rotational speed differential responsive type joint.

摘要

A rotational speed differential type torque transmitting assembly includes a rotor (40) rotatably disposed in a drive housing (30). During rotation speed differential between the rotor and drive housing, hydraulic fluid is discharged out of variable volume chamber (60) on diacharge stroke of the associated piston (50). Orifices are provided to restrict flow of hydraulic fluid discharged, inducing a pressure rise and adiabatic compression of the hydraulic fluid, causing heat build-up in the rotor. In order to prevent excessive rise in temperature of the assembly, a temperature responsive type spool valve (113) is provided to close the orifice means (76) in response to temperature rise of the hydraulic fluid in the rotor.