FREEWHEEL DRIVE DEVICE, PARTICULARLY FOR A BICYCLE

摘要

A bicycle wheel drive device (10) comprising a first sub-assembly (23) having a freewheel (14) and being secured to one of the frame mounting brackets (20), and a second sub-assembly (52) for supporting the hub (12), said second sub-assembly being supported by the other mounting bracket (18) via a tube (76). A first transmission sleeve (44) secured to the freewheel (14) is insertably engageable with a second transmission member (72) attached to the hub (12) for mechanically coupling or uncoupling the freewheel (14) and the hub (12) when the second sub-assembly (52) is mounted or dismantled, respectively. The wheel may thus be replaced without dismantling the driving freewheel (14), the transmission chain and the derailleur.