KR970001761A - Improved operability of excavators Flow control device - Google Patents
Improved operability of excavators Flow control device Download PDFInfo
- Publication number
- KR970001761A KR970001761A KR1019950017192A KR19950017192A KR970001761A KR 970001761 A KR970001761 A KR 970001761A KR 1019950017192 A KR1019950017192 A KR 1019950017192A KR 19950017192 A KR19950017192 A KR 19950017192A KR 970001761 A KR970001761 A KR 970001761A
- Authority
- KR
- South Korea
- Prior art keywords
- pressure
- control
- line
- electronic controller
- valve
- Prior art date
Links
Classifications
-
- 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
- E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves
- E02F9/2228—Control of flow rate; Load sensing arrangements using pressure-compensating valves including an electronic controller
-
- 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
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
- E02F9/2242—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance including an electronic controller
-
- 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
Abstract
본 발명은 굴삭기의 조작성 향상 유량제어장치에 관한 것으로, 주유압펌프(101,102)의 압유공급라인(L1,L2)이 메인콘트롤밸브(204)를 통해서 네가콘 라인(L7,L8)과 연결되어 이 네가콘라인의 지령압력이 높으면 유량을 감소시키는 반면에 지령압력이 낮으면 유량을 증가시키는 네가콘 유량제어수단과, 작동기 제어스푸울의 절환순간을 압력스위치(214,215)를 매개로 감지해서 상기 네가콘 유량제어수단에 지연제어압력을 인가하여 지연제어를 실시하는 지연제어수단을 갖춤과 더불어,부움조이스틱(117)과 그 제어스푸울(109)사이의 부움상승쪽 파일롯트라인(L10)에 압력스위치(1)가 설치됨과 더불어 상기아암조이스틱(2)과 스윙조이스틱(5)의 각 파일롯트라인(L20,L21;L22,L23)이 셔틀밸브(3,6)를 매개로 서로 연결되면서 각셔틀밸브(3,6)에 압력스위치(4,7)가 연결되는 한편, 상기 각 압력스위치(1,4,7)는 전자제어기(216)와 전기적으로 연결된구조로 되어, 상기 압력스위치(7)로부터 전류신호가 전자제어기(216)에 인가되면, 이 전자제어기(216)가 전자비례감압밸브(209)에 제어전류를 인가시키지 않으므로써 지연제어를 실시하지 않게 되어, 스윙속도를 향상시킬 수 있게 된 것이다.The present invention relates to a flow control device for improving the operability of an excavator, the pressure oil supply line (L1, L2) of the main hydraulic pump (101, 102) is connected to the negative cone line (L7, L8) through the main control valve 204 When the command pressure of the negative cone line is high, the flow rate is reduced, while when the command pressure is low, the switching time of the negative cone flow control means for increasing the flow rate and the actuator control spring is sensed through the pressure switches 214 and 215. It is equipped with a delay control means for applying delay control pressure to the cone flow control means to perform delay control, and the pressure on the boolean rising pilot line L10 between the boom joystick 117 and its control spring 109. In addition to the switch 1 is installed, each pilot line (L20, L21; L22, L23) of the arm joystick (2) and the swing joystick (5) are connected to each other via a shuttle valve (3, 6) each shuttle As long as pressure switches 4 and 7 are connected to valves 3 and 6 Each of the pressure switches 1, 4, and 7 is electrically connected to the electronic controller 216. When the current signal from the pressure switch 7 is applied to the electronic controller 216, the electronic controller 216 By not applying the control current to the electromagnetic proportional pressure reducing valve 209, delay control is not performed and the swing speed can be improved.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명에 따른 유압제어장치의 개략적인 유압회로도, 제2도는 종래 굴삭기에서 채택하고 있는 네가콘 시스템의 유량제어장치를 도시한 유압회로도, 제3도는 유량제어밸브의 스푸울이 개구되는 면적과 이 스푸울의 행정과의 관계를 도시한 그래프, 제4도는 펌프의 토출유량과 네가콘 압력과의 관계를 도시한 그래프, 제5도는 유량제어밸브를 거치지 않고 바이패스통로를 통하여 통과하는 유량과 네가콘 압력과의 상관관계를 도시한 그래프, 제8도는 종래 굴삭기의 조작성 향상 유량제어장치의 개략적인 유압회로도.1 is a schematic hydraulic circuit diagram of a hydraulic control device according to the present invention, Figure 2 is a hydraulic circuit diagram showing a flow control device of the negative-cone system adopted in the conventional excavator, Figure 3 is a sprue of the flow control valve opening A graph showing the relationship between the area and the stroke of this spool, FIG. 4 is a graph showing the relationship between the discharge flow rate of the pump and the negative pressure, and FIG. 5 is the flow rate passing through the bypass passage without passing through the flow control valve. Fig. 8 is a graph showing the correlation between the negative pressure and the negative pressure.
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950017192A KR0162960B1 (en) | 1995-06-23 | 1995-06-23 | Apparatus for controlling flowrate of hydraulic oil to improve handling an excavator |
JP8162733A JP2677983B2 (en) | 1995-06-23 | 1996-06-24 | Excavator flow controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950017192A KR0162960B1 (en) | 1995-06-23 | 1995-06-23 | Apparatus for controlling flowrate of hydraulic oil to improve handling an excavator |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970001761A true KR970001761A (en) | 1997-01-24 |
KR0162960B1 KR0162960B1 (en) | 1999-01-15 |
Family
ID=19418109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950017192A KR0162960B1 (en) | 1995-06-23 | 1995-06-23 | Apparatus for controlling flowrate of hydraulic oil to improve handling an excavator |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2677983B2 (en) |
KR (1) | KR0162960B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100805058B1 (en) * | 2001-07-06 | 2008-02-20 | 두산인프라코어 주식회사 | Hydraulic control system for trenching work mode of an excavator |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101281232B1 (en) * | 2006-09-29 | 2013-07-02 | 두산인프라코어 주식회사 | Apparatus for controlling displacement of variable displacement type of hydraulic pump |
JP2008115989A (en) * | 2006-11-07 | 2008-05-22 | Hitachi Constr Mach Co Ltd | Hydraulic drive mechanism for construction machine |
JP2008115990A (en) * | 2006-11-07 | 2008-05-22 | Hitachi Constr Mach Co Ltd | Hydraulic drive mechanism for construction machine |
KR20130137192A (en) * | 2010-12-27 | 2013-12-16 | 볼보 컨스트럭션 이큅먼트 에이비 | Boom-swivel compound drive hydraulic control system of construction machine |
WO2022209920A1 (en) * | 2021-03-29 | 2022-10-06 | 日立建機株式会社 | Work machine |
CN115030246B (en) * | 2022-05-23 | 2024-01-16 | 中联重科土方机械有限公司 | Positive flow excavator, control method, control device and controller thereof |
-
1995
- 1995-06-23 KR KR1019950017192A patent/KR0162960B1/en not_active IP Right Cessation
-
1996
- 1996-06-24 JP JP8162733A patent/JP2677983B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100805058B1 (en) * | 2001-07-06 | 2008-02-20 | 두산인프라코어 주식회사 | Hydraulic control system for trenching work mode of an excavator |
Also Published As
Publication number | Publication date |
---|---|
JP2677983B2 (en) | 1997-11-17 |
KR0162960B1 (en) | 1999-01-15 |
JPH093977A (en) | 1997-01-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5148676A (en) | Confluence valve circuit of a hydraulic excavator | |
US5852934A (en) | Fluid joining device for power construction vehicles | |
KR970043644A (en) | Hydraulic circuit of hydraulic excavator | |
GB1466605A (en) | Hydraulic controls | |
KR20040110422A (en) | control hydraulic circuit for hydraulic pump discharge flow | |
KR960008078A (en) | Hydraulic circuit for boom cylinder of hydraulic excavator | |
KR970001761A (en) | Improved operability of excavators Flow control device | |
US5493950A (en) | Variable priority device for swing motor in heavy construction equipment | |
KR920701692A (en) | Hydraulic oil supply circuit device to hydraulic cylinder for work machine | |
JPH08105078A (en) | Variable priority device | |
JPH08302752A (en) | Boom-lifting priority hydraulic circuit for hydraulic shovel | |
JP3149974B2 (en) | Hydraulic circuit of excavator | |
JP3513172B2 (en) | Hydraulic control device | |
KR101281232B1 (en) | Apparatus for controlling displacement of variable displacement type of hydraulic pump | |
JP3766972B2 (en) | Hydraulic circuit for construction machinery | |
JPH0914202A (en) | Negative control circuit of construction equipment | |
JPS5939203Y2 (en) | fluid control device | |
KR0166189B1 (en) | Controller for the flowrate of an excavator | |
JP2557047Y2 (en) | Pressure oil supply device | |
JP3738152B2 (en) | Hydraulic control device for power shovel | |
KR960014681A (en) | Improved operability of excavators Flow control device | |
JP2639554B2 (en) | Hydraulic equipment | |
SU1472586A1 (en) | Apf loading earth-moving machine on a test bed | |
KR960031723A (en) | Variable relief pressure control device of heavy duty swing motor | |
JPH07317707A (en) | Hydraulic circuit for construction machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20010702 Year of fee payment: 6 |
|
LAPS | Lapse due to unpaid annual fee |