| 摘要 |
A brake actuator includes an annular housing ( 10 b) having first and second opposite radial faces (A and B). Cavities are formed in the housing ( 10 b), some opening onto face (A) and some onto radial face (B). Two pistons ( 16 ) are disposed in each of the cavities and are movable under the influence of fluid pressure exerted from within the respective cavities to a braking position where the pistons ( 16 ) extend axially away from the cavity. The piston ( 16 ) bear against a backing plate of respective brake pads ( 68 ) forcing the brake pads ( 68 ) against brake discs ( 54 and 56 ). By providing cavities on both faces (A and B) of the housing ( 10 b), an actuator can simultaneously apply brake pads to two spaced apart rotating discs ( 54 and 56 ). A plurality of actuators can be coupled together to act on a plurality of axially spaced apart brake discs to form a multi-pad multi-brake system.
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