Hydraulic hoist cylinder rotary locking device

Abstract

The invention relates to an oil cylinder rotation type locking device of a hydraulic opening and closing machine. A fixed plate is rotationally mounted in a main oil cylinder; a through hole is formed in the fixed plate, and is formed by communicating two circular through holes positioned in the same arc; a locking rod penetrates through the through hole to be slidingly connected with the main oil cylinder; the through hole includes a first circular through hole and a second circular through hole; a shaft shoulder is arranged at one end of the locking rod; the radius of the first circular through hole is equal to the radius of the cross section of the locking rod; the radius of the second circular through hole is larger than the radius of the cross section of the shaft shoulder; and the fixed plate is driven to rotate through a rotation driving device. The oil cylinder rotation type locking device of the hydraulic opening and closing machine rotates the fixed plate to perform an arc motion with a pin shaft as circle center, realizes the switching of an unlocking state and a locking state of the locking rod, has an excellent locking function, is simple in operation, long in service life and stable in locking function, can effectively prevent the glide of a hydraulic oil cylinder, improves the safety of the hydraulic oil cylinder, and is low in cost and excellent in commercial prospect.

Description

technical field [0001] The invention relates to the technical field of hydraulic hoist, in particular to a hydraulic hoist oil cylinder rotary locking device. Background technique [0002] The locking device of the existing hydraulic hoist oil cylinder relies on the valve block next to the cylinder of the hydraulic hoist oil cylinder to lock. Realize the unlocking and locking functions of the hydraulic hoist cylinder, but such a locking device has two disadvantages: on the one hand, the valve itself is allowed to have leakage problems, and the valve core is pushed by the compression of the spring. When the spool reciprocates in the valve body, the spool will wear to a certain extent, which will increase the leakage. At the same time, the spring will also be fatigued and deformed, which will cause the spool to not run properly, which will cause the locking device to fail to lock the hydraulic hoist well. Oil cylinder, causing the hydraulic hoist cylinder to slide down. On t...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to overcome the problems of low stability and short service life of the locking device used in the existing hydraulic hoist cylinder, to provide a hydraulic hoist cylinder rotary locking device

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