| 摘要 |
A drum-type motor combines planet gear and spindle motor. The planet gear is arranged on lateral side of the spindle motor and the axis of the spindle motor is functioned as sun gear. The drum-type motor of the present invention has an inner gear engaged with the planet gear. The inner gear and the sun gear have such tooth ratio that the drum-type motor of the present invention has high torque at low rotation speed.
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