Improvements in disc brakes for vehicles.

摘要

The application of a disc brake is initiated by operation of a pull-rod (21) which is operative to move a pressure plate angularly, in turn to cause the plate to move axially and clamp a rotatable brake disc against a face in a housing. The outer end of the pull-rod (21) is in screw-threaded engagement with a rotatable sleeve (10 min ) which is axially slidable to a limited extent in a further housing (28). The housing (28) is coupled to the hand lever (16 min ), and has an abutment with the sleeve (10 min ). A clutch ring (31) in screw-threaded engagement with the sleeve (10 min ) is spring-loaded so as to be urged into frictional engagement with the housing when the pull-rod (21) is returned to a relatively retracted position following hydraulic application of the brake, with the clutch ring (31) being effective to cause rotation of the sleeve (10 min ) to screw it further onto the pull-rod (21) to compensate for wear of the friction linings.