Piston body and hydraulic cylinder

Abstract

The invention provides a piston body. The piston body is cylindrical, a sealing body mounting groove is formed on the outer peripheral surface of the piston body along the circumferential direction, guide ring mounting grooves are respectively formed on two sides of the sealing body mounting groove along the circumferential direction, the piston body comprises a rigid framework and an elastic filling material, wherein the elastic filling material is arranged on the rigid framework, and the outer peripheral surface of the piston body which is arranged between the end surfaces of the piston body and the groove edges of the guide ring mounting groove is formed by the elastic filling material. The invention further provides a hydraulic cylinder.. According to the technical scheme disclosed by the invention, the elastic filling material is filled in the piston body, so that the weight of the piston body can be effectively reduced, using occasions of the hydraulic cylinder are optimized and the application limitations of the hydraulic cylinder are reduced; a framework part of the piston body is still of a rigid structure and forms a support for a sealing body part, so that the piston body can effectively ensure that the strength can meet the requirements; in addition, when a fault or unbalanced loading occurs in guide of the piston body, damages on a cylinder barrel can be effectively reduced; and furthermore, the impact can also be reduced during the commutation of the piston body.

Description

technical field [0001] The invention belongs to the field of hydraulic components, and in particular relates to a piston body and a hydraulic cylinder with the piston body. Background technique [0002] Hydraulic cylinder is an actuator that can convert hydraulic energy into mechanical energy and output it. It has a wide range of applications and is receiving more and more attention. Among them, the piston body of the hydraulic cylinder is an important part of the hydraulic cylinder, and its performance has an important influence on the performance of the hydraulic cylinder. [0003] The hydraulic cylinder piston body in the related art is usually made of steel or cast iron materials, such as figure 1 As shown, there is a groove for installing the sealing body 02 on the outer peripheral surface of the middle section of the piston body 01, and grooves for installing the guide ring 03 are opened on the outer peripheral surface of the front and rear ends of the piston 01, and ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that when the guide of the piston body in the hydraulic cylinder fails or when an eccentric load occurs, the edge of the metal piston body will scratch the inner wall of the hydraulic cylinder, which will easily cause the cylinder to be damaged or even scrapped, and the metal piston body It has a large self-weight, so it is not suitable for occasions that are sensitive to the weight of the hydraulic cylinder and problems such as large reversing impact

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