| 摘要 |
<p>The present invention relates to disc brake suitable for use on commercial vehicles, the disc brake incorporating a parking brake facility in addition to a service brake facility. In one such disc brake the parking brake facility is operable by moving a lever (27) which is keyed to one end region of an elongate camshaft which is rotatably supported in the brake housing (1). Although this is efficient in operation, it is expensive to manufacture and as the lever (27) is mounted at one end of the camshaft, the bearings tend to be unevenly loaded when the lever (27) is actuated. The disc brake of the present invention comprises a housing (1) within which a brake actuator (3) is arranged, the parking brake facility being operable by a lever (27) connected to a cam member (13) which is eccentrically supported on a pivot pin (11) carried by the housing (1). The cam member (13) is arranged to act on the brake actuator arrangement (3) as the lever (27) is moved, the lever (27) projecting laterally of the cam member, near to the axial mid region of the cam member (13). The present invention thus provides a disc brake incorporating a lever mechanism which is relatively cheap to manufacture and which obviates or at least reduces the effects of the above disadvantages.</p> |
