Novel thin type jack

Abstract

The invention provides a novel thin type jack, which comprises a cylinder body and a piston, and is characterized in that a shut-off valve is arranged on the inlet of the lower end of the cylinder body, and comprises a valve body and a valve core located in the valve body; a linkage piece is arranged between the valve core and the piston. A check ring capable of sliding up and down is arranged on the upper end of the cylinder body. The valve core is connected with the piston through the linkage piece. The linkage piece can be a metallic cable or a chain or a rack. An inner valve core is arranged in the valve core. Compared with the prior art, the stroke of the thin type jack can be greatly increased to be 2.5 times of the original stroke, the production cost is effectively reduced, and the body height is reduced.

Description

technical field [0001] The invention relates to a jack, in particular to a novel thin jack. Background technique [0002] Thin jacks are generally divided into ordinary thin jacks, ultra-thin jacks and ultra-thin jacks according to their size, among which ordinary thin jacks are also called short jacks. The thin jack is a kind of lifting equipment for precise lifting in a limited space. It is generally used for jacking up and short-term support of equipment or buildings in civil engineering and automobile manufacturing industries. Its closing height and maximum stroke are the primary factors affecting its performance index. At present, the stroke of the thin jack is very low, which is greatly restricted in the actual application process. It mainly increases the stroke of the thin jack through multi-section pistons, but there are multi-section pistons. Due to the problems of high cost and small workload, the use is limited. The thin jack is affected by the height of the bod...

AI Technical Summary

Problems solved by technology

Its closing height and maximum stroke are the primary factors affecting its performance index. At present, the stroke of the thin jack is very low, which is greatly restricted in the actual application process. It mainly increases the stroke of the thin jack through multi-section pistons, but there are multi-section pistons. Due to the problems of high cost and small workload, the use is limited

The thin jack is affected by the height of the body, so its stroke is limited, and because the hydraulic pressure in the cylinder is very large, the thickness of the piston (not including the piston rod) and the stop ring is very large, which further limits the stroke of the thin jack

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