| 摘要 |
An electrically assisted cycle wherein the electrical assistance is provided by an electric drive arrangement carried on the frame of the cycle and powered by a battery also carried by the frame. The output of the drive arrangement is coupled to the driven wheel of the cycle so that operation of the electric drive arrangement can propel the cycle. The drive arrangement is mounted on the frame for limited movement relative to the frame against the action of a resilient bias provided by rubber mounting bushes. An electrical switch is operated by movement of the drive arrangement relative to the frame and the electrical switch is arranged in the energizing circuit of the motor of the electric drive assembly. The switch is operated by movement of the drive arrangement from a rest position to a position wherein the rubber bushes are stressed. Until the switch is so operated the motor cannot be energized. Movement of the drive arrangement relative to the frame is effected by the rider applying driving force to the panel of the cycle. Thus until the rider of the cycle starts to propel the cycle by pedalling the electric motor cannot be energized to aid the rider. Similarly should the rider cease pedalling then immediately the motor will return under the resilient bias to its rest position and the motor will be de-energized by opening of the switch. |
