Hydraulic cylinder for self-locking by spring

Abstract

The invention discloses a hydraulic cylinder for self-locking by a spring. The hydraulic cylinder comprises a cylinder barrel, a cylinder bottom, a cylinder cover, a piston and a piston rod; a blind hole is formed in the piston; a buffer device is arranged in the blind hole; a support column is arranged on the cylinder bottom; when the support column is acted on the buffer device, the moving speed of the piston is forced to slow down, so that quick collision between the piston and the cylinder bottom is prevented, and a certain protecting effect is achieved on a hydraulic system; the spring is arranged on the piston rod, and is provided with a locking rod; an oil inlet pipe and a self-locking groove are arranged in the cylinder barrel; when the piston rod moves to a certain position, the locking rod can be clamped into the self-locking groove due to the effect of the spring, and the piston rod is kept still to realize self-locking; and during unlocking, high-pressure oil enters the self-locking groove through the oil inlet pipe, pressure generated by the hydraulic oil can enable the locking rod to shrink back, and the piston rod can move again.

Description

technical field [0001] The invention relates to a mechanical transmission mechanism, in particular to a hydraulic cylinder which utilizes a spring for self-locking. Background technique [0002] Hydraulic transmission has many outstanding advantages, so it is widely used, such as plastic processing machinery, pressure machinery, machine tools, etc. for general industrial use; engineering machinery, construction machinery, agricultural machinery, automobiles, etc. in walking machinery; Metallurgical machinery, hoisting devices, roll adjustment devices, etc.; flood control gates and dam devices, river bed lifting devices, bridge control mechanisms, etc. for civil and water conservancy projects; turbine speed control devices for power plants, nuclear power plants, etc.; deck lifting machinery for ships (Winch), bow door, bulkhead valve, stern propeller, etc.; giant antenna control device for special technology, measuring buoy, lifting and rotating stage, etc.; artillery control...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that when the piston rod is stabilized at the working position in the traditional way, a hydraulic reversing valve is used to realize the locking of the piston rod, but there is a phenomenon of valve leakage, and the piston cannot be locked stably. Rod, and the buffer method adopted by the traditional buffer piston and the cylinder bottom has an impact on the sealing of the hydraulic cylinder. The purpose is to provide a hydraulic cylinder that uses springs for self-locking to solve the above problems

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