| 摘要 |
An electric motor and a speed reduction device for reducing a rotational speed of the motor are contained in a housing composed of a front housing and a rear housing. The motor is positioned in the housing at its rear side, and the speed reduction device at its front side. The speed reduction device is composed of a sun gear rotatably supported on an eccentric portion formed on a rotor shaft, a ring gear having inner teeth engaging with outer teeth of the sun gear, and an output shaft loosely coupled to the sun gear for outputting the rotational torque at a reduced speed. The ring gear made of a magnetic material is positioned in contact with an axial end of a stator core of the motor to provide an additional magnetic flux path and thereby to increase an output torque of the motor.
|
