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Control valve device of double-acting arm cylinder for operating mobile working machine

A technology for operating machinery and control valves, which is applied to fluid pressure actuating devices, mechanical equipment, earth movers/shovels, etc., which can solve problems such as structural consumption and achieve the effect of simple manufacturing costs

Inactive Publication Date: 2012-07-18
LINDE HYDRAULICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the additional stop valve of DE 10 2005 059 238 A1 or the regenerative switching position of DE 10 2005 059 239 A1 lead to additional structural complexity

Method used

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  • Control valve device of double-acting arm cylinder for operating mobile working machine
  • Control valve device of double-acting arm cylinder for operating mobile working machine
  • Control valve device of double-acting arm cylinder for operating mobile working machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] exist figure 1 A mobile working machine 1 , such as an excavator, having a control valve arrangement according to the invention is schematically shown in FIG.

[0027] A preferably rotatable upper carriage 4 is arranged on the lower carriage 2 with the travel drive 3 of the working machine 1 , which carries the working equipment 5 . In the exemplary embodiment shown, the working equipment 5 comprises a boom 6 arranged pivotably on the upper carriage 4 and which can be operated by means of a hydraulic boom cylinder 7 . An arm 8 is swingably arranged on the boom 6, and a hydraulic arm cylinder 9 is provided to operate the arm. The stick cylinder 9 is hinged on the boom 6 by means of a cylinder housing 9a and is connected to the arm 8 by means of a piston rod 9b which can be moved out or in to operate the arm. A working tool 10 , for example a bucket, is arranged on the stick 8 , and a hydraulic tool cylinder 11 is arranged on the stick 8 for actuating the working tool. ...

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Abstract

A control valve device (15) of a double-acting arm cylinder (9) for operating a mobile working machine possesses a control valve (20) and a regenerating unit (R). The control valve controls the connection between a first pressure medium line (25a) comprising the inflow side of the arm cylinder (9) and a pump (12), and the connection between a second pressure medium line (25b) comprising the backflow side of the arm cylinder (9) and a container (22). With the regenerating unit, the back side of the arm cylinder (9) and the inflow side of the arm cylinder can be connected. The regenerating unit (R) possesses a regenerating valve (30), the regenerating valve (30) runs from the backflow side of the arm cylinder (9) toward the second pressure medium line (25b) of the control valve (20). The regenerating valve (30) possesses a regenerating position (30a), the regenerating valve (30) at the regenerating position enables at least part of the second pressure medium line (25b) to be stopped and enables the backflow side of the arm cylinder (9) to be connected with the inflow side of the arm cylinder (9).

Description

technical field [0001] The invention relates to a control valve device for operating a double-acting stick cylinder of a mobile working machine, in particular an excavator, having a control valve and a regeneration device, said control valve controlling a second valve constituting the inflow side of said stick cylinder. connection of a pressure medium line to the pump and a second pressure medium line forming the return side of the stick cylinder to the container, the return side of the stick cylinder being able to be connected to the arm cylinder by means of the regeneration device The inflow side of the cylinder is connected. Background technique [0002] Such control valve arrangements are used to control energy consumers in mobile work machines, for example stick cylinders of excavators. In order to prevent cavitation on the inflow side of the stick cylinder and to achieve a high movement speed of the stick cylinder for a given pump delivery flow, such a control valve a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/044F15B13/00E02F9/20
CPCE02F9/2285E02F9/2217F15B11/024
Inventor M·德尔格
Owner LINDE HYDRAULICS
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