| 摘要 |
<p>Disclosed about a bicycle' s transmission system consisting of : a section of power input covering of a bicycle crank shaft (1), connected, in use, the pedals (2) of the bicycle through the intermediary of a crank arm (3); and a spiral spring (4) attached to one of the long side of the crankshaft (1) in that operations the spiral spring (4) can be played directly by the torque of the pedal paddle (2) by the crankshaft (1); A section of power output covering of a main sprocket (5) connected in parallel in direct contact with the spiral spring (4) that be paired parallel to the crankshaft (1) between the crank arm (3) and spiral spring (4); a second sprocket (6) smaller than the main sprocket (5) mounted can rotated by interconnection between main sprocket gear and second sprocket gear (5), in order to obtain a more rotation, and a next sprocket (7) paired attached directly to the second sprocket (6), wherein the rotation of a second sprocket (6) caused by the rotation of a main sprocket (5) will be directly lead to the rotation of the next sprocket (7), where the rotation of the next sprocket (7) can be transmitted to drive the motion of a bicycle chain.</p> |
