Hollow piston rod assembly capable of preventing pollution of hydraulic oil

A hollow piston rod, pollution prevention technology, applied in the direction of piston rod, engine components, engine sealing, etc., can solve the problems of polluted hydraulic oil, unsatisfactory inner hole size, large hydraulic oil flow resistance, etc., to reduce fluid resistance. , The effect of long positioning length and small flip displacement

CN106195261AInactive Publication Date: 2016-12-07SICHUAN YUEAN HEAVY IND MACHINERY EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-12-07
Estimated Expiration
Not applicable · inactive patent

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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.
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Description

technical field

[0001] The invention belongs to the technical field of piston rod assemblies, and in particular relates to a hollow piston rod assembly for preventing contamination of hydraulic oil. Background technique

[0002] In the production process of hydraulic cylinders, hollow piston rods are often used, and hydraulic oil flows through the hollow part of the hollow piston rods to achieve the use of the next level of hydraulic equipment. At present, the hollow piston rods are produced by using seamless steel pipes for heat treatment and then machining, grinding, electroplating and polishing, and the inner holes of the hollow piston rods are not processed. Since the hollow piston rod is not processed, the internal control size can only be the same as the internal hole size of the seamless steel pipe. Some hollow piston rods that require internal hole size cannot be produced, and the internal control is either too large or too small. .

[0003] And because the inner s...

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Embodiment Construction

[0019] The present invention will be further described below with reference to the embodiments, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, other used embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] With reference to the drawings, the hollow piston rod assembly for preventing contamination of hydraulic oil of the present invention includes a piston rod body 1 having a through hole 2, and the through hole 2 of the piston rod body 1 is a through hole directly machined by deep hole drilling. hole. The invention directly processes the through hole 2 of the piston rod through deep hole drilling. Compared with the prior art, the hollow piston rod is made of seamless steel pipe, and the required inner hole size can be processed according to the needs...