Kupplungseinheit mit mindestens einer Viskokupplung und einer Reibkupplung

摘要

A coupling unit comprises a viscous coupling A received within a coupling housing 29 of a friction coupling B so that viscous coupling A constitutes a separate closed unit which simplifies maintenance. Housing 29 is connected to an input and hub 12, of the viscous coupling A, is connected to an output. Between an end face 17 of the viscous coupling A and an end face of a pressure plate 28 of the friction coupling B there is provided setting means in the form of balls 42 and opposed ramps (see fig 6) which engage the friction coupling B after a predetermined torque level has been exceeded. Up to the predetermined torque level, torque is transmitted from the coupling housing 29 to the hub 12 solely by the viscous coupling A. Opposed pockets 39, 40 (also see fig 5) in the end face 17 and the pressure plate 28 accommodate return springs 41 which basis the end face 17 and pressure plate 28 into their starting position so that the setting means is capable of achieving different torque transmitting characteristics in two different directions.