| 摘要 |
An electrically power-assisted steering apparatus comprises resilient torque transmitting means for resiliently transmitting said steering torque from said steering shaft to said rotation shaft, and a switch assembly disposed between a battery and an electric motor which is controlled by a control unit to assist the steering effort of a vehicle driver. The switch assembly is designed to automatically turn off the electric current supplied to the electric motor independently of the control unit when the steering shaft is rotated with respect to a rotation shaft such as a pinion shaft within the range of a predetermined angle. The electric motor can be certainly prevented from being erroneously driven if the control unit controlling the electric motor is damaged or operated in a wrong manner.
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