Self-energizing disc brakes

摘要

A pressure plate for a self-energizing disc brake of the spreading type is provided with angularly spaced integrally cast ears which project inwardly from the inner peripheral edge of the plate, and a recess or dimple is also cast integrally in each ear in the face of the ear adjacent to the braking face. A region of each ear outwardly of the recess or dimple defines an abutment face forming an anchorage for one end of an anchorage portion of a tension return spring with the recess or dimple accommodating the free end of the anchorage portion. In a modification each abutment face may be machined in the respective ear by turning down the ear over an arcuate area passing through the center of the recess or dimple and using the braking face as a datum.