| 摘要 |
PCT No. PCT/GB90/01897 Sec. 371 Date Aug. 6, 1992 Sec. 102(e) Date Aug. 6, 1992 PCT Filed Dec. 5, 1990 PCT Pub. No. WO91/09235 PCT Pub. Date Jun. 27, 1991.A brake camshaft (22), having a cam (23) at one end for actuation by rotation of the camshaft to expand the brake shoes of a drum brake, has two spaced bearing assemblies (16, 21), preferably both self-aligning, releasably secured on an axle beam (1) at mountings (8, 9). The mountings have apertures, conveniently slots (10, 13), at least one of which is open or openable laterally of the brake camshaft (22) to enable the camshaft (22) to be manoeuvred, with tilting or lateral movement, out of engagement with the apertures when the bearing assemblies (16, 21) have been released from the mountings, to withdraw the camshaft with its bearing assemblies from the mountings. In one example the mounting (9) remote from the cam, a bearing mounting bracket, has an open-ended slot (10) opening to the edge of the mounting for withdrawal of the camshaft, and the other mounting (8) has a slot (13) with which the cam (23) has to be aligned for withdrawal. The arrangement enables the brake camshaft ( 22) to be removed with its bearing assemblies (16, 21) without having to disturb the wheel hub.
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