Filtering drive device with high reliability and precision

A highly reliable and accurate filter drive means includes a drive motor and a speed reducer, the speed reducer includes an eccentric shaft power input, double-gear, internal gear and the fixed gear power output; double-gear comprising an outer gear and the external gear I and II rotating fitting fitted over the eccentric section power input of the eccentric shaft, the fixed gear and the external gear I composed of small tooth number difference meshing I, the power output gear and the external gear II composed of small tooth number difference meshing II; small tooth number difference meshing I and the difference between the small teeth meshing sub-II are each provided with an elastic slotted filter structure; filtering structure comprises an elastic slotted wheel cogging, cogging wheel wheel gullet includes two curved tooth profile respectively equidistant teeth shape curve and arranged in a line with the wheel gear tooth top two curves wheel cogging cogging intersection; and / or, the resilient slotted filter structure includes a gear groove, the gear groove includes a straight groove gear, and the gear wheel groove filling cogging an elastic member; eccentric power input shaft of the drive motor output shaft rotate synchronously.