Quick double-acting hydraulic cylinder

A hydraulic cylinder and double-acting technology, which is applied in the field of hydraulic cylinders, can solve the problems of large structure and increased production costs, and achieve the effects of reducing production costs, prolonging service life and reducing diameter

Active Publication Date: 2013-08-21
FUJIAN LONGYAN SHENGTONG HYDRAULIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing fast hydraulic cylinders have a relatively fast speed when working, and the return stroke is realized by increasing the diameter of the piston rod, so that the structure becomes huge and the production cost is increased.

Method used

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Embodiment Construction

[0009] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

[0010] Such as figure 1 As shown, a double-acting fast hydraulic cylinder includes a cylinder barrel 1, a large piston rod 2, and a small piston rod 3, wherein the large piston rod includes a large piston, and the small piston rod includes a small piston, and the large piston rod 2 is nested in the An oil-free chamber 4 is formed in and between the cylinder 1, omitting the sealing problem of the large piston rod, and its end is fixed on the cylinder 1 by a pressure ring 5, and the small piston rod 3 is nested in the large piston The first oil liquid chamber 11 and the third oil liquid chamber 13 are formed in the rod 2 and between the large piston rod 2, and a guide sleeve 6 is arranged between the two ends of the small piston rod 3 and the large piston rod 2, and the small piston An oil guide tube ...

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Abstract

The invention discloses a quick double-acting hydraulic cylinder which comprises a cylinder barrel, a large piston rod and a small piston rod. The large piston rod is nested in the cylinder barrel, an oil-free cavity is formed between the large piston rod and the cylinder barrel, the tail end of the large piston rod is fixed on the cylinder barrel through a pressing ring, the small piston rod is nested in the large piston rod, a first oil cavity and a third oil cavity are formed between the small piston rod and the large piston rod, a guide sleeve is arranged among two ends of the small piston rod and the large piston rod, an oil conduit is arranged in the small piston rod, a second oil cavity is formed among the large piston rod, the small piston rod and the cylinder barrel, the small piston rod is provided with a first oil inlet and a second oil inlet, a third oil inlet is arranged at the front end of the cylinder barrel, the cylinder barrel is provided with an exhaust port communicated with the oil-free cavity, and a bleed screw is arranged in the exhaust port. Compared with a common oil cylinder, the quick double-acting hydraulic cylinder in the structure is more compact in integral structure, large in pushing force and high in feeding speed and return speed, and normal running rate of mechanical equipment is increased.

Description

technical field [0001] The invention relates to the technical field of hydraulic oil cylinders, in particular to a double-acting fast hydraulic cylinder. Background technique [0002] Fast hydraulic cylinders are often used on mechanical equipment that requires both greater thrust and faster work speed. It is mainly composed of a piston cylinder and a plunger cylinder. The existing high-speed hydraulic cylinder has a relatively fast speed when it is working, and it is realized by increasing the diameter of the piston rod when it is returning, so that the structure becomes huge and the production cost is increased. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings in the prior art, the object of the present invention is to provide a double-acting fast hydraulic cylinder, which drives a large piston cylinder through a small piston cylinder to realize a fast return stroke. Thereby reducing the diameter of the large piston rod and reduci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/16
Inventor 刘达兴郑龙海沈马炳生吴芹兰魏祥祯
Owner FUJIAN LONGYAN SHENGTONG HYDRAULIC
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