The invention belongs to the technical field of rail wagons, and particularly discloses a tilting air cylinder, which solves the problems of difficulty in
machining, inconvenience of mounting, unsmooth work process, relatively lower air pressure
bearing capacity in work, a plurality of
casting defects of castings, and the like of the conventional tilting air cylinder of an automatic dumping vehicle. In the tilting air cylinder, an outer cylinder and a middle cylinder are both formed by assembling and
welding independently-molded components; an outer cylinder body of the outer cylinder has a tubular structure formed by coiling and
welding a board; an inner cylinder
barrel of the middle cylinder also has a tubular structure formed by coiling and
welding the board; a lug is provided with a gas passage; one end of the gas passage is connected with a main air
pipe, and the other end of the gas passage is connected with an inlet
pipe of the outer cylinder body; and the lower end of the inlet
pipe is communicated with an air inlet at the bottom of the outer cylinder body. The tilting air cylinder has the advantages of reducing the
rejection rate and the production cost, avoiding the
casting defects of the original castings, reducing
dead weight, improving the appearance quality, eliminating own swing and avoiding further faults.