HYDRAULICALLY ACTIVATED ADJUSTABLE PULLEY FOR A TORQUE TRANSMISSION DEVICE

摘要

Hydraulically activated adjustable pulley (50) for a torque transmission device in a vehicular drive line. The pulley (50) is provided with two conical discs (51, 52) on a shaft (53) and with hydraulically activated displacement means (54, 55, 56) for displacing one such disc (52) along such shaft (53) towards the respective other one disc (51). The pulley shaft (53) is provided with an axially oriented channel (58) and with a radially oriented channel (59) branching-off from the axial channel (58) and connecting to the displacement means (54, 55, 56) for allowing hydraulic fluid to flow to and from the displacement means (54, 55, 56). The axial channel (58) either is open towards both axial ends (64, 65) thereof, or is closed-off in the axial direction, with the shaft (53) being provided with a further radially oriented channel (61), likewise branching-off from the axial channel (58).