Self-locking hydraulic cylinder

Abstract

The invention discloses a self-locking hydraulic cylinder. The cylinder comprises a cylinder body, wherein an upper end cover is fixedly arranged at the upper end of a cylinder body, and a lower end cover is fixedly arranged at the lower end of the cylinder body; a piston body is slidably connected in the cylinder body, a piston rod penetrating out of the upper end cover is arranged on the pistonbody, and the piston rod is in sliding connection with the upper end cover; a rod cavity is formed between the upper end cover and the piston body, and a rodless cavity is formed between the lower endcover and the piston body; and a port A communicating with the rod cavity and a port B communicating with the rodless cavity are formed in the side face of the cylinder body, a self-locking mechanismis arranged in the lower end cover, and when the self-locking mechanism can realize locking of the piston rod when the piston rod moves to any position. The self-locking hydraulic cylinder is simplein structure and capable of stopping and self-locking when the piston rod operates to any position.

Description

technical field [0001] The invention belongs to the technical field of hydraulic cylinders, in particular to a self-locking hydraulic cylinder. Background technique [0002] Self-locking hydraulic cylinders are widely demanded in the mechanical field of many lifting equipment such as metallurgy and coal mines. In order to prevent the workpiece from being displaced under the action of external force or self-weight (hydraulic cylinder vertical placement) when the hydraulic components stop working, it is necessary to The hydraulic cylinder is locked. At present, when the hydraulic lock is kept in a certain position for a long time, the accuracy often cannot meet the requirements due to problems such as pressure oil leakage. When an oil circuit failure occurs, the accuracy and reliability cannot be guaranteed; hydraulic locks often require one-way Valves, reversing valves and other auxiliary components cooperate to realize the locking circuit. The use of these components makes ...

AI Technical Summary

Problems solved by technology

At present, when the hydraulic lock is kept in a certain position for a long time, the accuracy often cannot meet the requirements due to pressure oil leakage and other problems. When an oil circuit failure occurs, the accuracy and reliability cannot be guaranteed; hydraulic locks often require one-way Valve, reversing valve and other auxiliary components cooperate to realize the locking circuit. The use of these components makes the whole device take up a lot of space. At the same time, the increase in the oil circuit is prone to leakage, causing inconvenience in maintenance and use.

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