| 摘要 |
<p>The structure has a driving unit mounted on an axle center between two pedal levers of a bicycle, where the bicycle is driven by human power or electric drive that is provided by the driving unit. An electric unit is linked to a speed reducing unit, and the speed reducing unit is coupled to a ratchet wheel. The ratchet wheel is connected with a gear disk, and a rotor shaft passes through axis of the electric unit, speed reducing unit, ratchet wheel and the gear disk. A power shaft i.e. hollow cylinder, is provided in the electric unit.</p> |
