| 摘要 |
<p>A cam freewheeling for an engine of motorcycle is disclosed and characterized by the cylindrical inner surface of a cam body (1) fitting with a bush (2) which is attached to the crankshaft (9) of the motorcycle, a driving sprocket (3) and a cage (5) being attached to the outer surface of the cam body (1); a cover (6) and a damping spring (4) being disposed the outside of the cage, the cage holding a plurality of rollers (7) which are in the arc recesses of the outer surface of the cam body. The driving sprocket (3) could not drive the chain reversely when the crankshaft (9) reverses, so as to protect the chain from breaking due to the sudden shock. The advantages of the cam freewheeling are simple structure, long life, reliable operation and no easiness of malfunction.</p> |
