Patent ID: 7982347
Filing Date: 2011-07-19
Classification: B60T,B62D,H02K

Abstract:
1. An electric power steering apparatus comprising: a housing having an inside receiving space; a steering gear mechanism which is received in the housing and which includes a worm wheel connected with a steering shaft, and a worm shaft engaged with the worm wheel; a motor which is received in the housing, which includes a rotating member serving as a motor output shaft and being connected with the worm shaft, and which is arranged to provide a steering assist force through the worm shaft and the worm wheel, to the steering shaft for transmitting rotation from a steering wheel toward a steerable wheel; a power system board which is received in the housing, which supports a component of a power supply circuit to supply power to the motor; a control system board which is received in the housing, which supports a component of a control circuit to control the motor, and which extends radially with respect to an axis of the motor output shaft; a rotation sensor which is provided in the housing, which is located, in an axial direction of the motor output shaft, between the motor and the control system board, and which is arranged to sense a rotational position of the motor output shaft; an output terminal which is provided with the rotation sensor, which is connected electrically with the control system board to supply a rotational position signal of the rotation sensor to the control circuit; and wherein the control system board includes a through-hole through which the motor output shaft of the motor extends.