SPEED CHANGE GEAR OF U-CRANK MECHANISM WITH COMBINATION OF EPICYCLIC GEAR AND FREE WHEEL

摘要

PURPOSE: To amplify accelerating magnification by several times compared to an existing speed change gear by merging an external type speed change gear of derailleur system with an internal type speed change gear formed of an epicyclic gear, and making them function simultaneously. ;CONSTITUTION: A carrier 37-9 is rigidly fixed to a hanger shaft A or the free body of a free wheel, and epicyclic gears 36-9 are rigidly fixed to both ends of the carrier 37-9. A sun gear 35-9 is rigidly fixed to a chain ring fitting flange 17-9 or a hub body, and the sun gear 35-9 and the epicyclic gears 36-9 are engaged in the meshed state. According to circumstances, internal gears are engaged in the meshed state with the epicyclic gears. The speed change mechanism of a bicycle or the like equipped with U-crank mechanism is thus formed.;COPYRIGHT: (C)1994,JPO&Japio