RAMP SYSTEM FOR ACTUATING A FRICTIONAL CLUTCH

摘要

A ramp system for actuating a frictional clutch, in particular a wet or dry multiple disc clutch, for coupling a drive shaft of a motor vehicle engine to at least one transmission input shaft, having an entrance ramp for introducing an actuating torque, an exit ramp, which is rotatable relative to the entrance ramp, for opening and/or closing the frictional clutch and a reset spring, configured as a leaf spring and connected to the entrance ramp and the exit ramp, for rotating the exit ramp relative to the entrance ramp to a defined starting position. At least one part of the torque transferred to the exit ramp can be transferred via the reset spring, the reset spring extends between a torque initiation point of the entrance ramp and a torque exit point of the exit ramp, substantially in the tangential direction, and extends at a setting angle to a radial plane of the ramp system. The reset spring allows an increase of the actuating force on the exit ramp in the case of an increase of the axial extension of the ramp system. By also using the reset spring, which extends tangentially at an angle to the radial plane, for torque transfer, a pressing force which decreases as the friction linings wear can at least be compensated by a modification of the direction of force of the torque introduced via the reset spring such that a secure closing of a frictional clutch is enabled, requiring only a small amount of design effort, wherein a particularly comfortable coupling of an internal combustion engine to a drive train of a hybrid motor vehicle is in particular simultaneously enabled.

主权项

1. A ramp system for operating a friction clutch, comprising an entrance ramp for introducing an actuating moment, an exit ramp that is rotational in reference to the entrance ramp for at least one of opening or closing the friction clutch, and a reset spring connected to the entrance ramp and the exit ramp and embodied as a leaf spring for rotating the exit ramp in reference to the entrance ramp in a defined starting position, with at least a portion of a torque transmitted to the exit ramp being transmittable via the reset spring, the reset spring extending between a torque initiation point of the entrance ramp and a torque output point of the exit ramp essentially in a tangential direction and diagonal about an angle in reference to a radial plane of the ramp system, with the return spring allowing an increase in actuating force at the exit ramp when an axial extension of the ramp system increases.