Self-relieving hydraulic cylinder and steel bar bending machine

Abstract

The invention relates to a hydraulic cylinder, in particular to a self-relieving hydraulic cylinder and a steel bar bending machine. The self-relieving hydraulic cylinder comprises a cylinder barrel and a piston, wherein the internal portion of the piston is provided with a hollow structure, the hollow structure is provided with a left inward convex edge and a right inward convex edge, the internal portion of the hollow structure is further provided with a left conical block and a right conical block, grooves for retaining a spring are formed between the left conical block and the right conical block, and the spring is connected with the left conical block and the right conical block; the back surface of the right conical block is fixedly connected with an ejector rod and the right end of the ejector rod exceeds the right side of the piston; a connecting rod is installed on the left conical block. The steel bar bending machine comprises a bending machine body, wherein the bending machine body is provided with a hydraulic cylinder which is said hydraulic cylinder. The self-relieving hydraulic cylinder has the advantages that the temperature of hydraulic fluid can be prevented from rising, the normal use is guaranteed and the phenomenon of cylinder expansion does not occur, and the operating speed can be further improved; the steel bar bending machine has the advantages that the temperature rise of the hydraulic cylinder is reduced and the service life is guaranteed.

Description

technical field [0001] The present invention relates to a hydraulic cylinder, and also relates to a steel bar bending machine equipped with the hydraulic cylinder. Background technique [0002] The hydraulic cylinder includes a cylinder barrel and a piston, the cylinder barrel has a first inlet and a second inlet and outlet for hydraulic fluid, the piston is installed in the cylinder barrel, the piston is connected with a connecting rod, and the hydraulic fluid is in the first inlet and outlet. It can drive the piston to run, and the piston drives the connecting rod to run, which can realize the external work of the hydraulic cylinder and meet the needs of some actions; in the prior art, the hydraulic cylinder has no parts to prevent the cylinder from expanding. , Continue to fill the hydraulic fluid into the cylinder when the piston is immovable, and the cylinder expansion phenomenon will occur, so that the hydraulic fluid will heat up, affecting the service life of the hyd...

AI Technical Summary

Problems solved by technology

[0002] The hydraulic cylinder includes a cylinder and a piston. The cylinder has a first inlet and outlet for hydraulic fluid and a second inlet and outlet. The piston is installed in the cylinder. The piston is connected to a connecting rod. In and out between the second outlet and the second outlet, it can drive the piston to run, and the piston drives the connecting rod to run, which can realize the hydraulic cylinder's work on the outside and meet the needs of some actions; in the prior art, the hydraulic cylinder does not have components to prevent cylinder expansion , when the piston is immovable, if you continue to fill the hydraulic fluid into it, the phenomenon of cylinder expansion will occur, so that the hydraulic fluid will heat up, affecting the service life of the hydraulic cylinder, or even damaging it.

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