| 摘要 |
A two-wheel drive type driving mechanism for a bicycle is provided to remarkably improve driving stability of the bicycle by properly adjusting rotational speeds of right and left driving wheels mounted to one driving shaft according to radiuses of rotation thereof in curve driving or rotation. A driving shaft(30) is horizontally installed on a support frame(100) through a pair of fixing brackets(33) and bearings(35). At least one driven sprocket(15) is installed at a center of the driving shaft to receive power from a driving sprocket(5) through a chain(20). A pair of driving wheels(50) is installed at right and left sides of the driving shaft respectively to relatively rotate through bearings(53). A pair of driving ratchet sprockets(60), each of which includes an inner ring and an outer ring, transmits power in one direction. The inner ring of the driving ratchet sprocket is coupled inside a hub(55) of the driving wheel. Each of a pair of driving plates(70) is rotated with the driving shaft while being coupled inside an inner diameter unit(25) of the driving shaft through a shaft through hole and has a sprocket receiving unit to restrict the outer ring of the driving ratchet sprocket and a plurality of power transmission protrusions(75) formed between saw teeth on the outer ring of the driving ratchet sprocket.
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