Combined connection device for preventing piston from rotating in radial direction and moving in axial direction

Abstract

The invention provides a combined connection device for preventing a piston from rotating in the radial direction and moving in the axial direction. The combined connection device mainly comprises a cylinder barrel, a piston rod, a locking nut, an elastic gasket, an elastic check ring, a sealing ring, a buffer sleeve and the piston. The piston is formed by combining a piston disc A and a piston disc B. The combined connection device is characterized in that the piston is prevented from rotating in the radial direction and moving in the axial direction by means of a shaft shoulder of the piston rod, the locking nut, the elastic gasket with a protrusion, and torsional deformation of the elastic gasket. The weight of the piston is reduced without loss of strength through the hollow cylindrical piston discs provided with supporting columns; the elastic gasket, the protrusion on the elastic gasket, the shaft shoulder of the piston rod and the locking nut prevent the piston from rotating in the radial direction and moving in the axial direction; and the piston discs are prevented from impacting and colliding with each other through the buffer sleeve between the piston discs.

Description

technical field [0001] The invention relates to a combined connecting device for preventing radial rotation and axial movement of a piston, in particular to a hollow cylindrical piston disc containing pillars to achieve weight reduction without loss of strength of the piston; through elastic washers and The protrusion on the circlip, the piston rod shaft shoulder and the lock nut can prevent the radial rotation and axial movement of the piston; the buffer sleeve between the piston discs can prevent them from colliding with each other, which belongs to the technical research and development field of hydraulic cylinders. Background technique [0002] Hydraulic cylinders use the linear reciprocating motion of the piston to convert hydraulic energy into mechanical energy. However, due to the singleness of the current piston structure and connecting device, it is easy to cause radial rotation or axial movement of the piston during use. The radial rotation of the piston will easi...

AI Technical Summary

Problems solved by technology

However, due to the singleness of the current piston structure and connecting device, it is easy to cause radial rotation or axial movement of the piston during use.

The radial rotation of the piston will easily cause smooth agitation inside the hydraulic cylinder, and the agitated fluid will react on the piston and affect the performance of the hydraulic cylinder; in addition, the radial rotation of the piston will easily drive the axial fixing parts of the piston to rotate together, so that the fixed loose parts, causing axial movement of the piston

The axial movement of the piston will cause a gap between the piston and the fastener, which will cause a delay when the piston of the hydraulic cylinder is started, and even the shock and jump of the piston rod.

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