Luffing jib maintaining valve for hydraulic shovel

A technology for hydraulic excavators and holding valves, applied to mechanically driven excavators/dredgers, etc., can solve problems such as potential safety hazards, lower booms, accidents, etc., and achieve the effect of reducing the sinking of the boom

Active Publication Date: 2008-10-29
JIANGSU CHANGLING HYDRAULIC CO LTD
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the bucket is full of materials or the hook on the bucket is used to lift heavy objects, the automatic lowering of the working

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Luffing jib maintaining valve for hydraulic shovel
  • Luffing jib maintaining valve for hydraulic shovel
  • Luffing jib maintaining valve for hydraulic shovel

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] As shown in Figures 1-9, the present invention is a boom holding valve for hydraulic excavators, which includes a valve block 1. The valve block 1 is provided with a first valve hole and a second valve hole, the first valve hole and the second valve hole The valve holes are parallel to each other.

[0021] The first valve hole is provided with a piston 4, a valve stem 6, a left spring seat I 8, a spring I 9, a right spring seat I 11, and a holding valve 14 from left to right. The valve stem 6 is connected, the outer edge of the cone core I 20 is provided with an O-ring IV21 and a retaining ring I 22, the right end is provided with an O-ring III19, the outer edge of the piston 4 is provided with a combined sealing ring I 5, and a right spring seat I 11 is provided with a combined sealing ring III10 on the outer edge, a plug I 2 is screwed on the left end of the first valve hole, and an O-ring I 3 is embedded on the outer edge of the plug I 2. The valve hole portion where the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a movable arm maintaining valve used for hydraulic excavators, which is installed between the bottom of a movable arm hydraulic cylinder and a movable arm control valve of a hydraulic excavator and mainly used for controlling the lifting, maintaining and descending of a movable arm. The movable arm maintaining valve comprises a valve block (1) opened therein with a first valve opening and a second valve opening and provided thereon with an overflow valve (44), wherein a piston (4), a valve stem (6), a left spring holder I (8), a spring I (9), a right spring holder (11) and a maintaining valve (14) are sequentially arranged inside the first valve opening from the left to the right, a core I (20) of the maintaining valve (14) is connected with the valve stem (6), the valve opening site where the valve stem (6) locates communicates with the overflow valve (44), a left spring holder II (29), a spring III (28), a right spring holder II (26) and a non-return valve (23) are sequentially arranged at the right side from the left to the right, the core II (25) of the non-return valve (23) are matched with the inner hole of the right spring holder II (26), and the left side of the second valve opening communicates with the rodless cavity of the movable arm hydraulic cylinder of the hydraulic excavator. The inventive movable arm maintaining valve can remarkably reduce the sinkage of the movable arm, so as to be safer and more reliable.

Description

technical field [0001] The invention relates to a holding valve, which is installed between the bottom of the boom hydraulic cylinder and the boom control valve of a hydraulic excavator. It is mainly used to control the lifting, maintaining and lowering of the boom. Suitable for excavators of various tonnages. It belongs to the technical field of hydraulic control components. Background technique [0002] In a conventional hydraulic excavator, the boom hydraulic cylinder is directly connected to the boom control valve, and the boom control valve is directly used to control the rise, fall and maintenance of the boom. After the hydraulic excavator lifts the bucket off the ground, the reversing valve of the boom or stick hydraulic cylinder may be temporarily returned to the neutral position due to various reasons, and the engine is in the idle state at this time. At this time, if the valve of the reversing valve If the gap between the core and the valve body is too large, th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E02F3/43
Inventor 邬逵清张爱军夏泽民陈酉冰潘逸明胡健松
Owner JIANGSU CHANGLING HYDRAULIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap