Locking oil cylinder

Abstract

The invention discloses a locking oil cylinder. The locking oil cylinder comprises a cylinder body. An upper end cover is arranged at the upper end of the cylinder body, and a lower end cover is arranged at the lower end of the cylinder body. A piston body is slidably connected in the cylinder body in the vertical direction, and a piston rod extending out of the upper end cover is arranged at theupper end of the piston body in the vertical direction. A rodless cavity is formed between the piston body and the lower end cover in the cylinder body, and a rod cavity is formed between the piston body and the upper end cover. A port A communicated with the rodless cavity is formed in the side face of the lower end cover, and a port B communicated with the rod cavity is formed in the side face of the cylinder body. A mounting groove communicated with the rodless cavity is formed in the lower end cover in the vertical direction, a locking rod extending vertically is arranged at the center ofthe bottom of the mounting groove, and a locking block is fixedly mounted at the upper end of the locking rod. A locking groove is formed in the lower end of the piston body. A locking assembly is arranged in the locking groove. An unlocking assembly is arranged in the lower end cover. The locking oil cylinder is simple in structure and capable of automatically locking and unlocking the piston body.

Description

Technical field [0001] The invention belongs to the technical field of oil cylinders, and specifically relates to a locking oil cylinder. Background technique [0002] Self-locking hydraulic cylinders are widely required in the mechanical fields of many take-off and landing 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 work is stopped, hydraulic components need to be The hydraulic cylinder is locked. At present, when the hydraulic lock is kept in a certain position for a long time, the accuracy is often not up to the requirements due to problems such as pressure oil leakage. In the event of an oil circuit failure, the accuracy and reliability cannot be guaranteed; hydraulic locks often require one-way A number of auxiliary components such as valves and reversing valves cooperate to achieve the locking circuit. The use of these c...

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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