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Control valve arrangement for double-acting stick cylinders for operating mobile work machines

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: 2016-04-20
LINDE HYDRAULICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the additional shut-off 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 arrangement for double-acting stick cylinders for operating mobile work machines
  • Control valve arrangement for double-acting stick cylinders for operating mobile work machines

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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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PUM

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Abstract

Control valve arrangement (15) for operating a double-acting stick cylinder (9) of a mobile work machine, in particular an excavator, having a control valve (20) and a regeneration device (R), the control valve controlling the stick cylinder (9) The connection between the first pressure medium pipeline (25a) on the inflow side and the pump (12) and the second pressure medium pipeline (25b) on the return side of the stick cylinder (9) and the container (22), by means of regeneration The device makes it possible to connect the return side of the stick cylinder (9) with the inflow side of the stick cylinder. The regeneration device (R) has a regeneration valve (30), which is arranged in the second pressure medium line (25b) leading from the return side of the stick cylinder (9) to the control valve (20), and the regeneration valve (30) has Regeneration position (30a), in which the regeneration valve (30) at least partially blocks the second pressure medium line (25b) and separates the return side of the stick cylinder (9) from the inflow side of the stick cylinder (9) connect.

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