FRICTION CLUTCH WITH WEAR ADJUSTMENT AND CONSTANT LIFT DEVICE

摘要

A constant lift device for a friction clutch comprises a lever (80) pivotally connected to the pressure plate (13) of the clutch. An abutment (82) on the lever contacts the clutch cover (21) during disengagement to limit the lift of the pressure plate (13). The pivotal position of the lever (80) relative to the pressure plate is controlled to maintain the lift of the pressure plate (13) substantially constant over the life of the clutch. The means for controlling the pivotal position of the lever (80) includes a pin (51) mounted for sliding movement relative to the pressure plate (13). The pin (51) contacts the lever and is inhibited from sliding movement towards the flywheel to prevent pivotal movement of the lever towards the flywheel but is able to slide in a direction away from the flywheel as the clutch wears to adjust the angular position of the lever. Due to the lever ratio the pin (51) slides by an amount which is less than the amount of wear.