Patent ID: 7673715

Claim:
A geared motor for an electric wheelchair to drive a wheel shaft of the wheelchair comprising: a motor, the motor having a motor shaft; and a speed reducer for reducing the speed of rotation of the motor shaft; wherein the speed reducer comprises: a hypoid pinion rotated by the motor shaft; a hypoid gear engageable with the hypoid pinion; an output shaft disposed in parallel with a center axis of the hypoid gear to drive the wheel shaft and orthogonal to the motor shaft; a clutch mechanism disposed between the output shaft and the hypoid gear, for connecting and disconnecting power transmission between the output shaft and the hypoid gear wherein the clutch mechanism further includes an external gear fixed on the output shaft; and an internal gear slidably mounted on the output shaft, the internal gear being engageable with the external gear, the internal gear and the external gear being engaged or disengaged with each other by sliding the internal gear along the output shaft.