| 摘要 |
The invention provides a speed-reduction motor, which can be used to stably and accurately maintain the shaft distance of a sensor gear of an angle sensor and a gear of a driving system gear group engaged with the sensor gear. The driving system gear group and the angle sensor are disposed in the speed-reduction motor having a housing formed by an outer cover, an upper housing, and a lower housing. The shaft of the sensor gear of the angle sensor is supported by a supporting hub disposed on a third area of an upper surface of the upper housing. A fourth gear of the driving system gear group engaged with the output shaft of the driving system gear group is supported by the supporting hub of the first area of the upper surface, and can be exposed from the third area of the upper surface through a gap window of a step part between the two areas, and then can be engaged with the sensor gear. Because the sensor gear and the fourth gear are supported by the same upper housing, the shaft distance can be maintained accurately, and the rotation angle of the output shaft detected by the angle sensor can be acquired accurately. |
