Inner planet gear drive device

The size of a switch mechanism of the existing valve is big, the structure is not compact, the input torque is large, the output torque is small, and the outer appearance is not beautiful. The aim of the utility model is to improve the defects, the shape of the utility model is similar to a cylinder, the center is an eccentric shaft, and a cover, a gear, an output disk, etc., are arranged on the shaft; the parts are arranged in a cylinder body which is provided with an inner gear ring and an upper and a lower holes, the gear is engaged with the inner gear ring body, and an upper cover, the gear and the output disk are connected together by a pin sleeve. A rotary hand wheel drives the gear and the output disk to reversely rotate, and a valve plate of a rotary valve can be widely used on the valve or other related transmission mechanisms.