Single-action double-graded hydraulic cylinder and engineering machine

A single-acting, hydraulic cylinder technology, applied in the direction of fluid pressure actuating devices, etc., can solve the problems of complex control procedures, difficult two-stage cylinder speed consistency, complicated operation, etc., to achieve simple speed control, low product cost, and simple structure. Effect

Active Publication Date: 2013-03-27
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the above-mentioned single-acting two-stage hydraulic cylinder is that it is difficult to control the consistency of the speed of the two-stage cyli

Method used

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  • Single-action double-graded hydraulic cylinder and engineering machine
  • Single-action double-graded hydraulic cylinder and engineering machine
  • Single-action double-graded hydraulic cylinder and engineering machine

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Embodiment Construction

[0037] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0038] Attached below figure 1 , each preferred embodiment of the present invention will be further described.

[0039] figure 1 It shows the single-acting two-stage hydraulic cylinder provided by Embodiment 1 of the present invention, the single-acting two-stage hydraulic cylinder includes:

[0040] A cylinder 1, one end of which is provided with an oil inlet, and a first chamber 1a communicating with the oil inlet; the other end of the cylinder 1 is provided with a primary guide sleeve 5;

[0041] A primary cylinder 2, which extends into the first chamber 1a and is slidably arranged in the primary guide sleeve 5;

[0042] The primary cylinder 2 includes: a cylinder 22 and a primary piston 21, the primary piston 21 is arranged at one end of the cylinder 22 close to the oil inlet, and the other end of the...

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Abstract

The invention discloses a single-action double-graded hydraulic cylinder and an engineering machine. The single-action double-graded hydraulic cylinder comprises a cylinder body, a primary cylinder barrel, a throttling pore plate and a secondary cylinder rod, wherein a primary guide sleeve is arranged at one end of the cylinder body; the primary cylinder barrel stretches into the cylinder body and can be arranged in the primary guide sleeve in a sliding manner; the primary cylinder barrel comprises a cylinder barrel and a primary piston; the throttling pore plate is fixedly connected with the inner wall of the primary piston; the secondary cylinder rod comprises a cylinder rod and a secondary piston; the secondary cylinder rod stretches into a chamber of the primary cylinder barrel and can be arranged in the secondary guide sleeve in a sliding manner; a piston of the primary cylinder barrel is internally provided with the throttling pore plate by the hydraulic cylinder; and a speed difference between the primary cylinder barrel and the secondary cylinder rod is adjusted by a throttling hole, so that when the primary cylinder barrel moves, the primary cylinder barrel and the secondary cylinder rod are relatively static and can move at the same speed. The single-action double-graded hydraulic cylinder has the advantages that the structure is simple; speed control between the adjacent cylinders can be realized without additionally arranging an auxiliary element; and the speed control is simple and the product cost is low.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a single-acting two-stage hydraulic cylinder and construction machinery. Background technique [0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy. The hydraulic cylinder has the advantages of simple structure and reliable operation. When the hydraulic cylinder is used to realize the reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is stable, so it is widely used in the hydraulic system of various construction machinery. [0003] Most of the existing single-acting two-stage hydraulic cylinders adopt a telescopic sleeve structure. This kind of hydraulic cylinder usually includes: a cylinder body, a primary cylinder barrel arranged in the inner cavity of the cylinder; and a secondary cylinder rod arranged in the primary cylinder barrel. The disadvantage of...

Claims

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Application Information

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IPC IPC(8): F15B15/16F15B15/22
Inventor 王继努王利军陈涛
Owner SANY HEAVY IND CO LTD (CN)
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