Stable hydraulic cylinder

Abstract

The invention discloses a stable hydraulic cylinder, which comprises a piston, an oil return chamber, a cylinder head and an oil outlet arranged on the cylinder head, wherein the piston comprises a piston body; the piston body comprises a piston groove, a piston head, a piston oil ring groove, a piston skirt, an oil passing hole and a piston pin hole; the piston pin hole is internally connected with a piston rod; the front end of the piston rod extends out of the piston pin hole to form a boss; the piston body is provided with the piston oil ring groove; the piston oil ring groove is arranged between the piston head and the piston skirt; the shape of the piston skirt is formed by connecting two arcs with two parallel line segments; the oil passing hole is formed in the arc at one side of the piston skirt; the oil passing hole passes through the piston groove, the piston oil ring groove and the piston skirt. The stable hydraulic cylinder has the advantages that the structure is simple, smoothness and high compactness are achieved, the situation that powder is remained in the piston groove to block the oil hole is effectively prevented, the scrap rate of the piston is greatly reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to a stable hydraulic cylinder. Background technique [0002] In the process of hydraulic transmission, in order to prevent the hydraulic cylinder piston from running to the end of the stroke during the return stroke, the speed is too high to hit the cylinder head, causing hydraulic shock and noise, or even damage, it is usually necessary to set up a buffer device, but generally used The buffer device only relies on reducing the oil flow rate and increasing the pressure in the oil return chamber to slow down the piston speed, but it cannot adjust the buffer pressure in a timely manner, which has poor flexibility and narrow application range. [0003] In addition, there are multiple ring groove structures on the piston crown and piston skirt of the traditional piston, which makes this kind of piston complex and high in cost, and research has found that it is unnecessary to have more than one piston ring, because once the upper pist...

AI Technical Summary

Problems solved by technology

[0003] In addition, there are multiple ring groove structures on the piston crown and piston skirt of the traditional piston, which makes this kind of piston complex and high in cost, and research has found that it is unnecessary to have more than one piston ring, because once the upper piston ring fails, Other piston rings cannot play a sealing role

The traditional piston has low smoothness and tightness, low sealing performance, and powder is easy to remain in the groove, blocking the oil hole, affecting air permeability and oil output, thereby shortening the service life of the piston

Images