摘要 |
A self-energising brake assembly, particularly for braking a drive shaft of a heavy tracked vehicle such as a tank, has a pair of discs (26, 27) carr ying friction pads (12) borne to rotate with the shaft. These friction discs are located to either side of a central non-rotating water-cooled disc asse mbly (9). A control brake disc (13) is also borne to rotate with the shaft b ut capable of turning relative to the same via a ball screw assembly (32). T o apply the brake the control disc (13) is retarded relative to the shaft by means of an associated calliper (not shown), which causes relative axial mo vement between the inner and outer rings (35, 36) of the ball screw. This mo vement drives the friction disc (27) axially along the shaft, on a ball spli ne (29-31) , towards the friction disc (26), thus clamping the non-rotating disc (9) between the two friction discs and braking the shaft.
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