A hollow piston rod assembly preventing contamination of hydraulic oil

Abstract

The invention belongs to the technical field of piston rod assemblies, discloses a hollow piston rod assembly capable of preventing pollution of hydraulic oil, and is used for solving problems of high flow resistance of the hydraulic oil and pollution of the hydraulic oil due to the fact that sizes of inner holes cannot meet requirements and the roughness of the inner holes is poor when hollow piston rods are produced from seamless steel tubes at present. The assembly comprises a piston rod body with a through hole, wherein the through hole of the piston rod body is directly machined through deep hole drilling. The through hole of the piston rod body is directly machined through deep hole drilling, compared with the hollow piston rods produced from the seamless steel tubes in the prior art, the assembly has the advantage that the required inner hole size can be machined according to the requirement of a hydraulic cylinder and the assembly has the characteristic of the smooth surface of the inner hole, the flow resistance of the hydraulic oil in the delivery process can be reduced, and meanwhile, delaminating conditions can be avoided, so that pollution of the hydraulic oil due to stains can be avoided.

Description

technical field [0001] The invention belongs to the technical field of piston rod assemblies, in particular to a hollow piston rod assembly for preventing hydraulic oil from being polluted. Background technique [0002] Hollow piston rods are often used in the production process of hydraulic cylinders, and hydraulic oil flows through the hollow part of the hollow piston rods to reach the next level of hydraulic equipment. At present, the production of hollow piston rods is all made of seamless steel pipes after heat treatment, machining, grinding, electroplating, and polishing, and the inner hole of the hollow piston rods is not processed. Since the hollow piston rod is not processed, the internal control size can only be the same as the inner hole size of the seamless steel pipe. Some hollow piston rods that have requirements for the inner hole size cannot be produced, and the internal control is either too large or too small. . [0003] And because the roughness of the i...

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Problems solved by technology

[0004] In order to solve the existing problems of using seamless steel pipes to make hollow piston rods, the size of the inner hole cannot meet the requirements, the poor roughness of the inner hole causes the flow resistance of the hydraulic oil to be large, and the hydraulic oil is polluted, and provides a method for preventing the hydraulic oil from being polluted. The hollow piston rod assembly can process the required inner hole size according to the needs of the hydraulic cylinder. At the same time, it has the characteristics of a smooth inner hole surface, which reduces the fluid resistance of the hydraulic oil during the delivery process and does not cause delamination. Does not contaminate hydraulic fluid due to stains

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