| 摘要 |
<p>The present specification discloses a wheel comprising a central hub (1) and an outer rim (3) interconnected by a web (5), with a pair of annular braking discs (7) being mounted one on each side of the web (5) by means of at least two connection assemblies (9). To avoid the problem of thermal stress cracking which occurs after a period of use when braking discs (7) are bolted directly to the web (5), each connection assembly (9) comprises a block member (11) adapted to be bolted to the web (5), the block member (11) having an elongated groove (19) located in one of the side faces of the block member (11), said groove (19) having an arcuate cross-section, with an elongate pin member (39) engaging in said groove (19) and in an elongate groove (33) of arcuate cross-section provided in the braking disc (7), said grooves (19,33) extending generally radially of the braking disc (7) to one side of an aperture (29) provided in the braking disc (7), over which aperture (29) the block member (11) is located. The opposite side face of the block member (11) is also held by the braking disc (7) in a region of the braking disc (7) on the opposite side of the aperture (29). The pin member (39) is preferably a roll pin which is held in the facing grooves (19,33) of the block member (11) and braking disc (7) in a compressed condition.</p> |
