KR20040024089A - Flow summation system of attachment excavators - Google Patents

Flow summation system of attachment excavators Download PDF

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Publication number
KR20040024089A
KR20040024089A KR1020020055592A KR20020055592A KR20040024089A KR 20040024089 A KR20040024089 A KR 20040024089A KR 1020020055592 A KR1020020055592 A KR 1020020055592A KR 20020055592 A KR20020055592 A KR 20020055592A KR 20040024089 A KR20040024089 A KR 20040024089A
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South Korea
Prior art keywords
spool
control valve
option
pilot
excavator
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KR1020020055592A
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Korean (ko)
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KR100664369B1 (en
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조성면
이민희
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현대중공업 주식회사
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Publication of KR20040024089A publication Critical patent/KR20040024089A/en
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Publication of KR100664369B1 publication Critical patent/KR100664369B1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: A flow joining device of an option device of an excavator is provided to maximize the optimal efficiency of the option device and the space utilization of a main control valve and the excavator by supplying hydraulic oil to the option device by additionally installing an inner passage using a joining spool in the main control valve of an option spool. CONSTITUTION: A hydraulic circuit of an excavator includes first and second main pumps(10,11) and a pilot supplying pump(12) for supplying hydraulic oil; a control valve for controlling the direction of actuating fluid supplied to the main pump; an arm cylinder(50) and an option device(40) operated by the control valve; and a remote control valve(30) for supplying pilot hydraulic oil to the control valve. A flow joining device of the option device of the excavator is composed of a shuttle valve(60) disposed between the remote control valve and the option spool to transmit pilot hydraulic oil from the option device to the arm joining spool; a shuttle valve(61) connected to the shuttle valve and arranged between the remote control valve and the arm joining spool to supply hydraulic oil to the arm joining spool; and a pilot line(28) for connecting the pilot line of the arm joining spool and the option spool.

Description

굴삭기 옵션장치의 유량합류 장치{Flow summation system of attachment excavators}Flow summation system of attachment excavators

본 발명은 굴삭기 옵션장치의 유량합류 장치에 관한 것으로, 보다 상세하게는 옵션스풀의 메인컨트롤밸브 내에 합류용 스풀(붐 또는 암)을 이용한 내부유로를 추가 설치하여 옵션장치에 압유를 공급함으로서 옵션장치의 최적효율 및 메인 컨트롤 밸브와 굴삭기 자체의 공간 활용도를 극대화 할 수 있도록 하는 굴삭기 옵션장치의 유량합류 장치에 관한 것이다.The present invention relates to a flow rate confluence device of an excavator option device, and more particularly, by installing an internal flow path using a joining spool (boom or arm) in the main control valve of the option spool and supplying pressure oil to the option device. It is related to the flow confluence device of the excavator option to maximize the efficiency of the main control valve and the space utilization of the excavator itself.

종래에는 도 2 종래 굴삭기의 유압회로도와 같이 구성되어 굴삭기의 작업장치 중 주로 붐(boom)과 암(arm)은 메인 컨트롤 밸브 내에서 각각의 메인 펌프유량을 합류시킴으로서 각 작업장치의 속도 및 조작성을 향상 시킬 수 있었지만, 다량의 유량이 요구되는 옵션장치에 대해서는 밸브의 제한된 공간으로 인하여 다른 옵션 밸브를 추가하는 등의 방법으로 옵션장치에 요구되는 유량을 공급함으로 인해 장비의 크기가 증가하고, 추가되는 장비로 인하여 제작비용이 증가되는 등 많은 문제점이 있었다.Conventionally, as shown in FIG. 2, the hydraulic circuit diagram of a conventional excavator includes a boom and an arm of the working devices of the excavator, respectively, incorporating respective main pump flow rates in the main control valve. Although it is possible to increase the size of the equipment by supplying the required flow rate to the option device, for example, by adding another option valve due to the limited space of the valve, There are many problems, such as increased manufacturing costs due to the equipment.

본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 안출되는 것으로,The present invention is made to solve the conventional problems as described above,

그 목적은 옵션스풀의 메인컨트롤밸브 내에 합류용 스풀(붐 또는 암)을 이용한 내부유로를 추가 설치하여 옵션장치에 압유를 공급함으로서 옵션장치의 최적효율 및 메인 컨트롤밸브와 굴삭기 자체의 공간 활용도를 극대화 할 수 있도록 하는굴삭기 옵션장치의 유량합류 장치를 제공하는 것이다.The purpose is to install an internal flow path using a joining spool (boom or arm) in the option spool's main control valve to supply pressure to the option device to maximize the optimum efficiency of the option device and the space utilization of the main control valve and the excavator itself. It is to provide a flow confluence device of the excavator optional device to enable.

본 발명은 압유를 공급하는 제 1, 2 메인펌프 및 파일럿 공급펌프와, 상기 메인펌프로 공급되는 작동유의 방향을 제어하는 컨트롤밸브와, 상기 컨트롤밸브에 의해 작동하는 암 실린더 및 옵션장치와, 상기 컨트롤밸브로 파일럿 압유를 공급하는 리모트 컨트롤밸브를 포함하여 구성된 굴삭기의 유압회로에 있어서, 옵션 측으로부터의 파일럿 압유를 암 합류스풀로 보내주도록 리모트 컨트롤밸브와 상기 옵션스풀 사이에 구비된 셔틀밸브와, 상기 셔틀밸브에 연결되어 암 합류스풀에 압유를 보내주도록 리모트 컨트롤밸브와 상기 암 합류스풀 사이에 구비된 셔틀밸브와, 상기 파일럿 공급펌프에서 토출된 압유를 암 합류용 스풀의 파일럿 라인에 인가하여 옵션장치의 작동시 상기 제 1, 2 메인펌프의 유량이 합류 하도록 상기 암 합류 스풀의 파일럿 라인과 옵션스풀을 연결하는 파일럿 라인으로 구성된 것을 특징으로 하는 굴삭기 옵션장치의 유량합류 장치를 제공함으로서 발명이 추구하는 목적을 달성 할 수 있다.The present invention provides a first and second main pump and a pilot supply pump for supplying pressure oil, a control valve for controlling the direction of the hydraulic oil supplied to the main pump, an arm cylinder and an optional device operated by the control valve, An hydraulic circuit of an excavator comprising a remote control valve for supplying pilot pressure oil to a control valve, comprising: a shuttle valve provided between the remote control valve and the option spool to direct pilot pressure oil from an option side to a female confluence spool; Shuttle valve is provided between the remote control valve and the female confluence spool to connect the shuttle valve to the female confluence spool, and the hydraulic oil discharged from the pilot supply pump to the pilot line of the female confluence spool option The pilot line of the female confluence spool so that the flow rates of the first and second main pumps join when the device is operating. It is possible to achieve the object of the present invention by providing a flow rate confluence device of the excavator option device characterized in that the pilot line connecting the option spool.

도 1 은 본 발명 굴삭기의 유압회로도,1 is a hydraulic circuit diagram of the excavator of the present invention,

도 2 는 종래 굴삭기의 유압회로도.2 is a hydraulic circuit diagram of a conventional excavator.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

(10) : 제 1 메인펌프 (11) : 제 2 메인펌프10: first main pump 11 second main pump

(12) : 파일럿 공급펌프 (20) : 메인 컨트롤밸브(12): Pilot supply pump (20): Main control valve

(21) : 암 스풀 (22) : 암 합류스풀21: arm spool 22: arm joining spool

(23) : 옵션스풀 (24)~(28) : 유압관로(23): Option spool (24) ~ (28): Hydraulic line

(30) : 리모트 컨트롤밸브 (40) : 옵션장치(30): remote control valve (40): optional device

(50) : 암 실린더 (60), (61) : 셔틀밸브(50): arm cylinder (60), (61): shuttle valve

상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명의 실시예인 구성과 그 작용을 첨부도면에 연계시켜 상세히 설명하면 다음과 같다.When described in detail with reference to the accompanying drawings, the configuration and the operation of the embodiment of the present invention to achieve the object as described above and to perform the task for eliminating the conventional drawbacks.

도 1 은 본 발명 굴삭기 유압 회로도를 도시한 것으로, 제 1 메인펌프(10)와제 2 메인펌프(11) 및 파일럿 공급펌프(12)로 구성되고 유압탱크(도시없음)에 연결되어 장비에 압유를 공급해주는 메인펌프부와, 옵션장치(40)에 압유를 공급하는 옵션스풀(23)과 암 실린더(50)에 작동유를 공급하는 암 스풀(21) 및 암 합류스풀(22)로 구성된 메인 컨트롤밸브(20)와, 상기 파일럿 공급펌프(12)에 연결되어 메인컨트롤밸브(20)에 유입되는 압유의 공급을 조절하는 리모트 컨트롤밸브(30)로 구성된다.Figure 1 shows the excavator hydraulic circuit diagram of the present invention, which is composed of a first main pump 10, a second main pump 11 and a pilot supply pump 12 and connected to a hydraulic tank (not shown) to pressure the equipment A main control valve comprising a main pump unit for supplying, an option spool 23 for supplying pressure oil to the option device 40, and an arm spool 21 and an arm confluence spool 22 for supplying hydraulic oil to the arm cylinder 50. And a remote control valve 30 connected to the pilot supply pump 12 to control the supply of pressure oil flowing into the main control valve 20.

상기 메인 컨트롤밸브(20)에는 옵션 측으로부터의 파일럿 압유를 암 합류스풀로 보내주도록 리모트 컨트롤밸브(30)와 상기 옵션스풀(23) 사이에 구비된 셔틀밸브(60)와, 상기 셔틀밸브(60)에 연결되어 암 합류스풀에 압유를 보내주도록 리모트 컨트롤밸브(30)와 상기 암 합류스풀(22) 사이에 구비된 셔틀밸브(61)가 구비된다.The main control valve 20 has a shuttle valve 60 provided between the remote control valve 30 and the option spool 23 to send pilot pressure oil from the option side to the female confluence spool, and the shuttle valve 60 A shuttle valve 61 is provided between the remote control valve 30 and the female confluence spool 22 so as to supply pressure to the female confluence spool.

이하, 본 발명의 실시예를 첨부도면과 연계하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

상기 파일럿 공급펌프(12)에서 토출되는 압유가 리모트 컨트롤밸브(30)에 의해 암 스풀(21)의 파일럿 라인에 인가됨과 동시에 암 합류 스풀(22)의 파일럿 라인에도 인가되고, 제 2 메인펌프(11)로부터 토출되는 유량은 메인 컨트롤밸브(20) 내부 유로를 통하여 암 스풀(21)로 흐름과 동시에 제 1 메인펌프(10)로부터 토출되는 유량이 메인컨트롤밸브(20) 내 유로(25), 암 합류스풀(22), (26) 및 (27)을 통하여 암 스풀(21)로 흐르던 제 2 메인펌프(11)의 유량과 합류되어 암 실린더(50)를 작동하게 된다.The pressurized oil discharged from the pilot supply pump 12 is applied to the pilot line of the female spool 21 by the remote control valve 30 and also to the pilot line of the female confluence spool 22, and the second main pump ( 11, the flow rate discharged from the first main pump 10 flows simultaneously with the female spool 21 through the flow path inside the main control valve 20. Through the arm confluence spools 22, 26, and 27, the flow rate of the second main pump 11 that flows into the arm spool 21 is operated to operate the arm cylinder 50.

상기 제 1 메인펌프(10) 및 제 2 메인펌프(11)의 유량을 합류, 즉 다량의 유량이 요구되는 옵션장치를 사용할 경우 파일럿 공급펌프(12)에서 토출되는 압유가 리모트 컨트롤밸브(30)에 의해 옵션스풀(23)의 파일럿 라인에 인가됨과 동시에 셔틀밸브(60)를 통해 옵션 A 측 또는 옵션 B 측으로부터의 파일럿 압유가 셔틀밸브(61)를 거쳐 암 합류스풀(22)의 파일럿 라인에도 인가되어 제 2 메인펌프(11)로부터 토출되는 유량은 메인 컨트롤밸브(20) 내부유로를 통해 옵션스풀(23)로 흐름과 동시에, 제 1 메인펌프(10)로부터 토출되는 유량이 메인 컨트롤밸브(20) 내 유로(25), 암 합류스풀(22), (26) 및 (28)을 통해 옵션 스풀(23)로 흐르던 제 2 메인펌프(11)의 유량과 합류되어 옵션장치(40)를 작동하게 된다.When the flow rate of the first main pump 10 and the second main pump 11 are combined, that is, when an option device requiring a large amount of flow is used, the pressure oil discharged from the pilot supply pump 12 is controlled by the remote control valve 30. Is applied to the pilot line of the option spool 23 and the pilot pressure oil from the option A side or the option B side is transferred to the pilot line of the female confluence spool 22 via the shuttle valve 60 through the shuttle valve 60. The flow rate applied and discharged from the second main pump 11 flows to the option spool 23 through the internal flow path of the main control valve 20, and the flow rate discharged from the first main pump 10 is controlled by the main control valve ( 20) the flow rate of the second main pump 11 flowing into the option spool 23 through the inner flow path 25, the female confluence spools 22, 26 and 28 to operate the option device 40. Done.

본 발명은 상술한 특정의 바람직한 실시 예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 고안이 속하는 기술 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

상기와 같은 본 발명은 굴삭기 시장의 최근 추세인 장비의 콤팩트와 및 다기능화에 대응이 가능한 옵션유량의 합류를 셔틀밸브 및 내부관로 등을 이용함으로서 기존밸브 시스템보다 다양하고 사용이 간편하며, 옵션장치의 효율 및 메인 컨트롤밸브와 굴삭기 자체의 공간 활용도를 극대화 할 수 있으며, 제작비용이 감소하는 등 매우 유용한 발명인 것이다.As described above, the present invention utilizes a shuttle valve and an internal pipeline to combine the compactness of the equipment which is a recent trend in the excavator market and an optional flow rate capable of multi-functioning, and is more versatile and easier to use than the existing valve system. The efficiency and space utilization of the main control valve and the excavator itself can be maximized, and the manufacturing cost is very useful invention.

Claims (1)

압유를 공급하는 제 1, 2 메인펌프 및 파일럿 공급펌프와, 상기 메인펌프로 공급되는 작동유의 방향을 제어하는 컨트롤 밸브와, 상기 컨트롤 밸브에 의해 작동하는 암 실린더 및 옵션장치와, 상기 컨트롤밸브로 파일럿 압유를 공급하는 리모트 컨트롤밸브를 포함하여 구성된 굴삭기의 유압회로에 있어서,First and second main pumps and pilot supply pumps for supplying hydraulic oil, control valves for controlling the direction of hydraulic oil supplied to the main pumps, arm cylinders and option devices operated by the control valves, and the control valves. In the hydraulic circuit of an excavator comprising a remote control valve for supplying pilot pressure oil, 옵션 측으로부터의 파일럿 압유를 암 합류스풀로 보내주도록 리모트 컨트롤밸브와 상기 옵션스풀 사이에 구비된 셔틀밸브(60)와,A shuttle valve (60) provided between the remote control valve and the option spool to direct pilot pressure oil from the option side to the female confluence spool; 상기 셔틀밸브(60)에 연결되어 암 합류스풀에 압유를 보내주도록 리모트 컨트롤밸브와 상기 암 합류스풀 사이에 구비된 셔틀밸브(61)와,A shuttle valve 61 connected between the remote control valve and the female confluence spool so as to be connected to the shuttle valve 60 to send pressure oil to the female confluence spool; 상기 암 합류 스풀의 파일럿 라인과 옵션스풀을 연결하는 파일럿 라인(28)으로 구성된 것을 특징으로 하는 굴삭기 옵션장치의 유량합류 장치.And a pilot line (28) for connecting the pilot line of the female joining spool and the option spool.
KR1020020055592A 2002-09-13 2002-09-13 Flow summation system of attachment excavators KR100664369B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100800080B1 (en) * 2006-08-11 2008-02-01 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Hydraulic circuit of construction machine
KR20170130168A (en) * 2016-05-18 2017-11-28 두산인프라코어 주식회사 Hydraulic system of construction equipment

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
KR101500745B1 (en) * 2008-11-21 2015-03-09 두산인프라코어 주식회사 Control circuit for selecting option operation of construction machinery

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Publication number Priority date Publication date Assignee Title
KR960008723Y1 (en) * 1992-05-27 1996-10-07 김연수 Oil-pressure control circuit of excavator
KR970011609B1 (en) * 1994-11-28 1997-07-12 대우중공업 주식회사 Apparatus for controlling a hydraulic pump for option attachment in an excavator
JP3730715B2 (en) * 1996-07-11 2006-01-05 東芝機械株式会社 Hydraulic control valve device
KR100212218B1 (en) * 1996-12-31 1999-08-02 추호석 Multi-purpose hydraulic control device of heavy equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100800080B1 (en) * 2006-08-11 2008-02-01 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Hydraulic circuit of construction machine
KR20170130168A (en) * 2016-05-18 2017-11-28 두산인프라코어 주식회사 Hydraulic system of construction equipment

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