| 摘要 |
<p>A bidirectional controlled free-wheeling device for motorcycles comprises a chain wheel (1), a dust cover (3), a roller race (7) fixed to said chain wheel (1), a polygonal disk (5) which is mounted in the inner periphery of said roller race (7) for providing a plurality of bowed spaces and a plurality of annular recesses therebetween, a bush (2) which is rotatably engaged with said polygonal disk (5) through a bearing (6), a plurality of clamping rollers (10) disposed in said bowed spaces, an annular cage (11) which is provided in said bowed spaces and said annular recesses with a plurality of pockets in which said clamping rollers are holded, an annular dust-proof friction plate (13) which is provided between said cage (11) and a check ring (12) locked at said polygonal disk, and a roller stop provided in said polygonal disk.</p> |
