Self-energising disc brake.

摘要

A self-energising disc brake of the spreading type is adapted to be actuated for normal service braking by an hydraulic actuator (40). The actuator (40) is located between the pressure plates (10, 11) of an expander mechanism (4) in which balls or rollers (16) are housed in pair of complementary recesses (17) in adjacent faces of the plates (10, 11). The actuator (40) is so positioned that the line of action of the applying force from the actuator (40) acts the pressure plates (10, 11) at a position disposed within the radial thickness of each plate between its radially innermost and outermost peripheral edges.