| 摘要 |
PURPOSE: An eccentric-wheel electric wheel series with periodical varied speed ratio driven by pedaling is provided to form an electric speed ratio of an active wheel different with a passive wheel because a synchronized electric belt is coupled to an eccentric electric wheel. CONSTITUTION: An eccentric-wheel electric wheel series(1000) with periodical speed ratio driven by pedaling comprises an electric belt(100). The electric belt comprises a chain and a belt with a timing saw-toothed wheel shape or a saw-toothed wheel shape. A circular active wheel, an eccentric passive wheel(413), and an auxiliary wheel(312) are electrically operated each other. The circular active wheel is coupled to an active wheel shaft(111). Both sides of the active wheel shaft are respectively coupled to a first crank(101) and a second crank(201). A first pedal shaft(103) for installing a first pedal(102) is installed on the first crank. A second pedal shaft(203) for installing a second pedal(202) is installed on the second crank. The circular active wheel and the eccentric passive wheel are respectively composed of an unslidable chain wheel or a timing saw-toothed wheel shaped pulley or gear. The eccentric passive wheel is installed in a passive wheel shaft(211). |
