Axle assembly air tightness detector

The utility model relates to the technical field of axle assembly air tightness detection, and discloses an axle assembly air tightness detector which comprises a vacuum box, one side of the vacuum box is fixedly provided with an exhaust pipe, one side of the exhaust pipe is fixedly provided with a third hood, and a vacuum pump is fixedly arranged in the third hood. A pressure gauge is fixedly arranged on the front end face of the vacuum box, an upper cover is arranged at the top end of the vacuum box, a circle of rubber clamping block is fixedly arranged at the bottom end of the upper cover, and a circle of clamping groove is formed in the top end in the vacuum box. According to the utility model, after the car assembly is placed in the vacuum box and the upper cover is covered, gas in the vacuum box can be pumped out through the vacuum pump, the air pressure condition in the vacuum box can be displayed on the pressure gauge in real time, and when the air pressure drops abnormally, the air leakage problem of