Wheel-drum motor with internal gear and external rotation

The invention relates to an out swinging rotary drum typed motor with inner gear. It effectively realizes lower rotate speed and high pulling torque from high rotate speed. The invention includes motor, planet gear group and end part on the rotating side. Output rotating shaft of the motor is sun gear with homocentric location end. The planet gear group is extended to form a concentric convex part. The end part on the rotating side provides the swivel and inner gear. The planet gear group is fixed on the homocentric location end, and is engaged to the sun gear. The swivel of the end part on the rotating side is put on the concentric convex part and its inner gear enages the planet gear.