| 摘要 |
Apparatus constituting a driven hub (11) for a bicycle or the like comprising, in combination, hub member (15), drive axle (20) fixed to said hub member, wheel axle (12) passing coaxially through said hub member and said drive axle, a combination of needle roller bearing and needle roller clutch in a common cage (25) working on a smooth cylindrical outer surface of said drive axle and sleeve (27) in which is accommodated said combination of needle roller bearing and needle roller clutch in a common cage, the outer surface of said sleeve being shaped to receive engagement means; said combination of components permitting said driven hub to freewheel silently when not driven or to be driven in rotation via said engagement means with, effectively, no take-up angle in the transition from the freewheeling state to the driven state.
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