Motor non-return structure

The motor non-return structure is characterized in that a convex part is arranged on the surface, facing the end part of a rotating shaft, of a rear outer cover of a motor, and an arc-shaped groove is formed in the radial outer side of the convex part; the rotating shaft and the non-return disc are connected through a key and rotate coaxially; the non-return disc is provided with a radial non-return groove, and the inner side of the non-return groove corresponds to the arc-shaped groove of the protruding part. A non-return ball is arranged in the non-return groove, and a groove plug is arranged on the outer side of the non-return groove. The backstop device has the advantages that the backstop structure and the motor are combined into a whole, the anchoring function of the rear outer cover is ingeniously utilized, and the backstop device is of a mechanical structure and is stable, reliable and better in effect. The size of the non-return structure is effectively reduced, and related manufacturing cost is redu