Axle lifting mechanism of metro vehicle wheel set bearing withdrawal machine

The utility model discloses an axle lifting mechanism of a metro vehicle wheel set bearing withdrawal machine, which relates to the technical field of mechanical equipment and comprises a bottom plate, support frames are fixedly connected to two sides of the top of the bottom plate, and a mounting plate is fixedly connected between the two support frames and above the bottom plate. A motor is mounted in the middle of one end of the top of the mounting plate, the output end of the motor is connected with a bidirectional output mechanism, and the two sides of the bidirectional output mechanism are connected with screw lifting mechanisms located on the mounting plate. Electric lifting of the axle is achieved through the two-way output mechanism and the screw lifting mechanism, the requirements of wheels of various models of metro vehicles for the slide size when bearings are withdrawn are met, the surfaces of the bearings cannot be damaged, the surfaces of the bearings are prevented from being pulled, and the se