Hub pushing mechanism

The utility model relates to the technical field of automobile hubs, and discloses a hub pushing mechanism which comprises a rodless air cylinder, a first sliding block is connected to the outer side of the rodless air cylinder in a sliding mode, a fixing frame is fixedly connected to the first sliding block, a mounting frame is fixedly connected to the inner side of the fixing frame, and a connecting column is hinged to the inner side of the mounting frame. A push plate is fixedly connected to one end of one side of the connecting column, a protection assembly is arranged on the push plate and comprises an insertion column and a tension spring, a deep groove is formed in the other end of one side of the push plate, and one end of the insertion column is inserted into the deep groove; when the protective pad is abraded, one end of the inserting column is separated from the outer side of the limiting column by pulling the inserting column upwards, at the moment, the limiting column is reset under the action of