| 摘要 |
A bicycle forward driving apparatus includes a driven sprocket wheel which rotates by receiving a pedal's driving force; an inner sprocket wheel separably coupled to a rear wheel's hub axle; first one-direction rotation means installed between the driven sprocket wheel and inner sprocket wheel so that its rotation force is transmitted to the inner sprocket wheel only during the driven sprocket wheel's forward rotation; a plurality of intermediate gears engaged between the driven sprocket wheel and inner sprocket wheel for transmitting rotation force; a support bracket for rotatably fixing the plurality of intermediate gears; a fixed cylinder inserted into the rear wheel's fixed axle; and second one-direction rotation means installed between the fixed cylinder and support bracket so that only the support bracket rotates forward. Accordingly, the apparatus enables a bicycle to be driven forward even during the pedal's reverse rotation, as well as it is freely shifted forward/backward. |
