| 摘要 |
A disc brake for a heavy road vehicle has a caliper (1) arranged at a brake disc (2) mounted on a wheel axle of the vehicle. A thrust rod (11) of the disc brake transforms a rotational ingoing movement from a drive means (3) into a linear outgoing movement for transmission to a disc brake pad (12), intended for braking engagement with the brake disc. The thrust rod has a non-rotatable spindle (20), a rotatable nut member (22) in thread engagement with the spindle, and a thrust rod gear (10) for receiving the ingoing rotational movement. A biased roller and ramp arrangement (30, 10', 22') is operationally interposed between the nut member (22) and the thrust rod gear (10) and is intended for rotating the nut member on the spindle at a low counterforce in the spindle and for axially transferring the nut member with the spindle at a high counterforce in the spindle.
|
