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Annular hydraulic cylinder provided with mechanical self-locking devices

A technology of annular hydraulic cylinder and self-locking device, which is applied in the field of hydraulic cylinders, can solve problems such as leakage and insufficient safety and reliability, and achieve the effects of convenient installation, simple structure, and safe and reliable use

Inactive Publication Date: 2017-01-11
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the traditional technology, the self-locking of the hydraulic cylinder is mostly realized by the hydraulic valve, but due to the leakage of the hydraulic valve, this method is not safe and reliable enough

Method used

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  • Annular hydraulic cylinder provided with mechanical self-locking devices
  • Annular hydraulic cylinder provided with mechanical self-locking devices
  • Annular hydraulic cylinder provided with mechanical self-locking devices

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Embodiment Construction

[0017] In order to fully explain the technical solution of the present invention, it will be described below in conjunction with the accompanying drawings.

[0018] like figure 1 As shown, the embodiment of the present invention provides an annular hydraulic cylinder with a mechanical self-locking device. Including: a cylinder seat (1), an annular cylinder body (2), and an annular piston (3). The annular cylinder (2) is fixed on the cylinder base (1) by screws, the annular piston (3) cooperates with the annular cylinder (2) to form a closed hydraulic chamber, and the annular piston (3) and the annular cylinder (2) A first sealing ring (8) and a second sealing ring (9) are installed respectively, and an oil inlet hole (10) is opened on the annular cylinder body (2).

[0019] In order to enable the hydraulic cylinder to achieve mechanical self-locking, two symmetrically distributed self-locking grooves (12) are opened on the cylinder base (1), and self-locking pins (13) and se...

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PUM

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Abstract

The invention provides an annular hydraulic cylinder provided with mechanical self-locking devices. The annular hydraulic cylinder comprises a cylinder base, an annular cylinder body and an annular piston, wherein the annular cylinder body is fixedly mounted on the cylinder base through screws, the annular piston is matched with the annular cylinder body to form a closed hydraulic cavity, sealing rings are mounted on the annular piston and the annular cylinder body, an oil inlet hole is formed in the annular cylinder body, two symmetrically distributed self-locking grooves are formed in the cylinder base, self-locking pins and self-locking springs are mounted in the self-locking grooves, and the self-locking grooves, the self-locking springs and the self-locking pins form mechanical self-locking devices. The annular hydraulic cylinder is simple in structure and convenient to mount and can realize mechanical self-locking when the hydraulic cylinder jacks a bearing shaft.

Description

technical field [0001] The invention relates to the field of hydraulic cylinders, in particular to an annular hydraulic cylinder with a mechanical self-locking device. Background technique [0002] The jacking piston of the hydraulic jack in the prior art is generally designed as a solid rod, which cannot complete the work in some shaft-shaped load-bearing parts that need to be uniformly stressed. After the jack lifts up the heavy object, in order to prevent accidents in the hydraulic cylinder, it is generally used to add steel columns or sleepers between the lifted heavy object and the ground, but some load-bearing structures do not allow the addition of steel columns, etc. , can only be done through the self-locking of the hydraulic cylinder. [0003] In traditional technology, hydraulic cylinder self-locking is mostly realized by hydraulic valve, but due to the leakage of hydraulic valve, this method is not safe and reliable enough. Contents of the invention [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/26F15B15/14
CPCF15B15/261F15B15/1423F15B15/1428F15B15/1447
Inventor 吴博王山琪王林丁洪正
Owner HARBIN UNIV OF SCI & TECH