Pressure-balanced single-outlet-rod high-pressure oil cylinder

Abstract

The invention relates to a pressure-balanced single-outlet-rod high-pressure oil cylinder. The pressure-balanced single-outlet-rod high-pressure oil cylinder comprises a cylinder block, a front end cover, a back end cover, an exhaust port, a piston and a piston rod; the cylinder block is of a cylindrical structure; the front end cover is tightly and fixedly mounted at one axial end of the cylinderblock; the back end cover is tightly and fixedly mounted at the other axial end of the cylinder block; the piston is coaxially mounted in the cylinder block in a driving manner; internal space of thecylinder block is divided into two cavities not communicating with each other by the piston; the piston rod is fixedly inserted in the piston; one end of the piston rod coaxially extends out of the front cover, and the other end of the piston rod is in coaxial limiting support in a support hole formed in the back end cover; the back end cover is provided with an oil injecting channel communicating with the internal of the cylinder block; the front end cover is provided with an oil injecting hole communicating with the internal of the cylinder block; and the exhaust port is fixedly mounted atthe middle part of the axial end surface of the back end cover. Cavities on the two sides of the piston are rod cavities, so that the motion flexibility is improved under the precondition of guaranteeing tightness, the service life is long, and the working reliability of elements and total service life are improved.

Description

technical field [0001] The invention is applied to the field of high-pressure oil cylinders, in particular to a pressure-balanced single-rod high-pressure oil cylinder. Background technique [0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has simple structure and reliable operation. When it is used to realize reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is stable, so it is widely used in various mechanical hydraulic systems. At present, the internal structure of the single-rod hydraulic cylinder is that the piston rod is fixed on one side of the piston, and the piston is driven to reciprocate in the cylinder body through the hydraulic oil, but the piston divides the cylinder body into a rod chamber and a rodless chamber. In the rod drive, there will be problems of unbalanced force on both sides and inac...

AI Technical Summary

Problems solved by technology

At present, the internal structure of the single-rod hydraulic cylinder is that the piston rod is fixed on one side of the piston, and the piston is driven to reciprocate in the cylinder body through the hydraulic oil, but the piston divides the cylinder body into a rod chamber and a rodless chamber. In the rod drive, there will be unbalanced force on both sides and inaccurate displacement control, which will affect the output pressure and work stability.

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