The utility model provides an oil cylinder for an energy-saving hydraulic system of a hollow blow molding machine, comprising a piston rod, a cylinder bottom, an inner cylinder body and an outer cylinder body. The inner cylinder body is located in the outer cylinder body and connected with the cylinder bottom, the piston rod is sleeved between the outer cylinder body and the inner cylinder body, the inner cylinder body and the piston rod are of a hollow structure and communicated with each other, the cylinder bottom is provided with a first oil inlet communicating with the inner cylinder body, the cylinder bottom is also provided with a second oil inlet communicating between the inner cylinder body and the outer cylinder body, and the outer cylinder body is provided with an oil outlet. On the premise that the moving speed, pressure and other aspects of the utility model are not affected, a small pump station and a low-power motor can be used to meet various requirements of users, and even higher requirements can be achieved, thus reducing the production cost of users and achieving remarkable results in energy conservation and efficiency improvement.
Country Code: CN
Application Number: CN201821196721.4
