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Hydraulic jack

A hydraulic jack and hydraulic cylinder technology, applied in the field of hydraulic jacks, can solve the problems of easy wear of hydraulic pumps, slow jacking speed, and long travel time, and achieve the effects of reducing labor intensity, prolonging service life, and increasing jacking speed

Inactive Publication Date: 2014-03-26
SHANGHAI SHENGANG ELEVATORING TOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to solve the problem that the hydraulic jack in the prior art has a slow lifting speed and a long stroke time under no-load or light load, many times of operation under no-load, and high strength. Low efficiency, easy wear and tear of hydraulic pump, etc.

Method used

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Embodiment Construction

[0012] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0013] It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not intended to limit the present invention Therefore, it has no technical substantive meaning, and any modification of structure, change of proportional relationship ...

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Abstract

The invention relates to the technical filed of jacking devices, particularly to a hydraulic jack. The hydraulic jack comprises a base, a hydraulic pump, a hydraulic cylinder and a piston rod and also comprises a center swing tubing which is fixed on the base; the upper end of the center swing tubing is communicated with the inner chamber of the piston rod and matched with a piston rod joint which is fixedly connected with the lower end of the piston rod in a seal sliding mode; the center swing tubing is communicated with the hydraulic pump through a first check valve which is arranged on an oil rapid feeding oil channel; the base is provided with a pressure regulating assembly. According to the hydraulic jack, the center swing tubing, an oil rapid feeding oil channel pipeline and an oil slow feeding oil channel pipeline are arranged, the pressure regulating assembly is matched with the hydraulic jack to achieve the hydraulic jacking work, and accordingly the jacking speed can be significantly improved under the condition that the long distance light load or no-load is jacked, meanwhile jacking of the overloading load can be achieved well, and accordingly the labor intensity is reduced and the service life of the hydraulic pump is extended.

Description

technical field [0001] The invention relates to the technical field of jacking devices, in particular to a hydraulic jack. Background technique [0002] Existing hydraulic jacks generally adopt a slow-speed lifting method in which hydraulic oil increments are used to increase the top pressure. Hydraulic jacks are generally composed of hydraulic pumps, bases, piston rods, hydraulic cylinders, oil tank sleeves, top caps, and oil return components. Composition, when working, operate the handle of the hydraulic pump to press a certain volume of hydraulic oil into the inner cavity of the hydraulic cylinder, so that the piston rod can be lifted a certain distance. Under no-load or light load, the jacking speed is slow and Long travel time, many operations under no-load, high labor intensity, low efficiency, easy wear and tear of the hydraulic pump, etc. These problems are especially obvious when the long jack is lifted for a long distance without load, which greatly affects the wo...

Claims

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Application Information

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IPC IPC(8): B66F3/42
Inventor 历建平
Owner SHANGHAI SHENGANG ELEVATORING TOOL
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