Axial positioning device for hub reduction gear

The utility model discloses a hub reduction gear axial positioning device which comprises a rotating shaft, the tail end of the rotating shaft is fixedly connected with a positioning ring, a rotating gear is rotationally connected between the positioning ring and the rotating shaft, and the side end of the positioning ring is fixedly connected with a rotating shaft tail end fixing shell; and the cooling shell is fixedly connected to the rotating shaft shell, a water conveying groove is formed in the cooling shell, the water conveying groove of the cooling shell is communicated with a water conveying pipe, the water conveying pipe is communicated with a cooling water pump, and condensate water circulates in the water conveying pipe. The cooling shell is arranged outside the rotating shaft, the water conveying pipe is connected into the water tank in the cooling shell, cooling water is conveyed into the cooling shell through the cooling water pump and the water conveying pipe, and cooling work on the rotating s