Patent ID: 8102138
Filing Date: 2012-01-24
Classification: B62D,F16H,H02K

Abstract:
1. An electric power steering apparatus comprising: a steering column having inserted therein a steering shaft to which steering torque is transmitted; a reduction gear box coupled to the steering column; and an electric motor that transmits a steering assisting force to the steering shaft via a reduction mechanism in the reduction gear box, characterized in that the electric motor and a control unit including a control board mounted with a control circuit that controls to drive the electric motor are provided side by side in the reduction gear box, and a connection terminal of the electric motor is electrically connected to the control unit directly, and the reduction gear box includes at least a worm housing unit that houses a worm coupled to an output shaft of the electric motor, a worm-wheel housing unit that houses a worm wheel coupled to the steering shaft, and a torque-sensor housing unit that is coupled to the work-wheel housing unit to house the torque sensor and coupled to the steering column, and a control-unit mounting section for mounting the control unit is formed in outer peripheral portion of the worm housing unit, the worm-wheel housing unit, and the torque-sensor housing unit.