| 摘要 |
PURPOSE: To suppress racing a pedal by interposing between pedal/motor side drive shafts rotating a side gear of a differential gear device a rotation stop means of regulating relative rotation exceeding a prescribed range between both the drive shafts, so as to regulate transmitting an output of a pedal drive system to a motor. CONSTITUTION: Respectively in a pedal/motor side drive shaft 13, 15, a side gear 35 of constituting a differential gear device 16 is mounted, to mesh each side gear 35 with a pinion gear 36 arranged in a case 30. While absorbing a delicate differential rotational speed between the pedal/motor side drive shafts 13, 15 due to a control delay by rotating the pinion gear 36, the case 30 is rotated, to transmit its rotation to a rear wheel 4. Here are provided protrusions 51, 52 mutually engageably with an end face of the drive shafts 13, 15. At motor starting time with rotation not rising and at battery weak time, both the protrusions 51, 52 are united so that the motor side drive shaft 15 follows rotating the pedal side drive shaft 13. |
