Assembly axle box for diesel locomotive

The utility model relates to an assembly axle box for an internal combustion locomotive. Including a base, the bottom of the base is connected with a balancing frame through gaskets; a rubber pad is fixedly mounted at the top of the base; the tops of the rubber pads are connected with axle box springs through lower spring seats; the top of the axle box spring is connected with an upper spring seatmatched with the axle box spring; a pin shaft is arranged in the center of the top of the balancing frame; one side of the outer wall of the pin shaft is connected with a bearing gland; the inner wall of the bearing gland is fixedly connected with an axle box outer cover; one end of the axle box outer cover is connected with a screw extending into the bearing gland; the screw is provided with a self-aligning roller bearing in the length direction of the bearing gland, a J-shaped oil seal cover connected with the bearing gland is installed at one end of the self-aligning roller bearing, the outer portion of the J-shap