Balancing cylinder of the dieing machine

The utility model discloses to a balancing cylinder, which comprises a cylinder body, a bed plate, a piston, and an end cover. The piston integrated with a piston rod is arranged in the cylinder body. The motherboard is arranged at the bottom of the cylinder body. The end cover is covered on the cylinder body and is locked by a pull rod. The piston rod passes through the end cover and is connected to a hang block and a capstan nut. The dustproof plate is arranged at the bottom of the bed plate. Compared with the prior art, the utility model has the advantages of gas-proof, well sealed performance, safety and reliability and long service life. The polyurethane oil seal has well wearing resistance for repeatedly use more than ten million times. The piston is contacted with the inner wall of the cylinder body via the wearing belt made of composite material of Teflon and bronze to ensure the whole verticality and the concentricity of the cylinder body.