| 摘要 |
<p>The electric bicycle (1) has pedal crank (7) that is provided with a first transmission wheel (21). A driven wheel (4) e.g. rear wheel is provided with second transmission wheel (22). An electric motor (11) is provided with a third transmission wheel (23). The transmission wheels e.g. chain wheels are made to encircle the endless circulating drive unit (15) e.g. chain. A sensor is provided to measure the treading force applied to the third transmission wheel.</p> |
