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Control method of main control valve of excavator and device for executing the method

A technology of a main control valve and a control method, which can be applied to earth movers/shovels, fluid pressure actuating devices, motor vehicles, etc., can solve problems such as pressure loss, and achieve the effect of reducing pressure loss

Active Publication Date: 2021-02-19
DOOSAN INFRACORE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As such, when the boom and stick are operated at the same time, there is a possibility of pressure loss as part of the first flow must go through the second arm control spool and part of the second flow must go through the second boom control spool

Method used

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  • Control method of main control valve of excavator and device for executing the method
  • Control method of main control valve of excavator and device for executing the method
  • Control method of main control valve of excavator and device for executing the method

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0037] The present invention can implement various modifications and have various forms, and specific embodiments will be exemplarily shown in the drawings and described in detail. However, the present invention is not limited to the embodiments disclosed hereinafter, and should be construed as including all modifications, equivalents, and replacements within the scope of the inventive concept and technology. In the description with reference to the drawings, similar reference numerals are assigned to similar components.

[0038] Terms such as first and second may be used to describe various constituent elements, but they do not have a limiting meaning, and are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first constituent element may be named a second constituent element, and a similar se...

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PUM

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Abstract

According to the control method of the main control valve of the excavator of the present invention, when the boom cylinder and the arm cylinder are increased by operating the boom control lever and the arm control lever, it is possible to close the first hydraulic pump and the arm cylinder. A second stick between the bodies controls the spool valve. A first arm control spool valve disposed between the first hydraulic pump and the boom cylinder may be opened to supply the first flow generated from the first hydraulic pump to the boom cylinder. A second boom control spool disposed between the hydraulic pump and the boom cylinder may be closed. A first arm control slide valve disposed between the second hydraulic pump and the arm cylinder may be opened to supply the second flow rate generated from the second hydraulic pump to the boom cylinder. Therefore, it is possible to reduce pressure loss caused via the second boom spool and the second arm spool.

Description

technical field [0001] The present invention relates to a control method of a main control valve of an excavator and a device for implementing the method, and in more detail relates to a control method of a main control valve for operating the boom and stick of an excavator, and a device for performing the method device. Background technique [0002] Typically, the boom and stick of an excavator can be operated hydraulically. Hydraulic pressure can be sent from the hydraulic pump to the boom and stick through the main control valve. A recent excavator may include two pumps, a first hydraulic pump and a second hydraulic pump. Therefore, the main control valve may include a first boom control spool, a second boom control spool, a The first stick controls the spool and the second boom controls the spool. [0003] According to the related art, when operating the arm or the arm alone, the first flow generated from the first hydraulic pump and the second flow generated from th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F9/22
CPCE02F9/2264E02F9/2267E02F9/2242F15B2211/3059F15B2211/35F15B2211/6346F15B2211/665F15B2211/6654F15B2211/71F15B2211/75E02F9/2292F15B11/17F15B2211/20576F15B2211/7051E02F9/2221E02F9/2004F15B13/02B60Y2200/412E02F3/425E02F9/2225F15B13/06F15B2211/51F15B2211/523
Inventor 金基龙安玄植郑雨容金昶默
Owner DOOSAN INFRACORE CO LTD