KR900016555A - 백호우용 유압회로 - Google Patents
백호우용 유압회로 Download PDFInfo
- Publication number
- KR900016555A KR900016555A KR1019900003649A KR900003649A KR900016555A KR 900016555 A KR900016555 A KR 900016555A KR 1019900003649 A KR1019900003649 A KR 1019900003649A KR 900003649 A KR900003649 A KR 900003649A KR 900016555 A KR900016555 A KR 900016555A
- Authority
- KR
- South Korea
- Prior art keywords
- control
- pump
- control valve
- hydraulic circuit
- control member
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
-
- 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
-
- 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
-
- 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
Landscapes
- 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)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
내용 없음.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
첨부된 도면은 본발명과 관련한 유압회로의 바람직한 실시예를 예시하는 것으로서,
제1도는 도우저를 장착한 배호우 작업차량을 도시한 측면도.
제2도는 본발명의 유압회로의 다이어그램.
Claims (2)
- 작업차량의 백호우 기구와 함께 사용되는 유압회로에 있어서, a) 엔진, b) 제1펌프는 제1급송오일통로를 통해서 제1제어부재와 좌우측 추진제어 밸브의 하나에 연결되어 있고, 제2펌프는 제2급송오일통로를 통해서 제2제어부재와 추진 제어밸브쌍의 다른 하나에 연결되어 있으며, 제3펌프는 선회제어밸브와 제3제어부재에 연결되어 있는 엔진에 의해 구동되는 상기 제1내지 제3펌프, c) 상기 좌우측 추진제어밸브, 상기 선회제어밸브, 그리고 상기 제1내지 제3제어부재에 각각 연결된 복수의 액츄에이터부재, d) 상기 제1 및 제2급송오일통로에 낮은 릴리프 압력을 실현하기 위한 제1모우드와 높은 릴리프 압력을 실현하기 위한 제2모우드를 선택적으로 제공하기 위한 릴리프 압력 전환부재, e) 제3펌프가 로딩될때 제1모우드를 자동으로 제공하도록 상기 릴리프 압력 전환부재를 야기하며 제3펌프가 언로딩될때 상기 제2모우드를 자동으로 제공하도록 상기 전환부재를 야기하기 위한 릴리프 압력 제어부재로 구성되어있는 것을 특징으로 하는 백호우기구용 유압회로.
- 제1항에 있어서, 상기 제1제어부재는 아암 제어밸브로 구성되어 있으며, 상기 제2제어부재는 부움제어밸브와 버킷 제어밸브로 구성되어 있고, 상기 제3제어부재는 스윙 제어밸브와 도우저 제어밸브로 각각 구성되어 있는 것을 특징으로 하는 백호우기구용 유압회로.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1-99072 | 1989-04-18 | ||
JP1099072A JPH0751796B2 (ja) | 1989-04-18 | 1989-04-18 | バックホウの油圧回路 |
JP99072 | 1989-04-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR900016555A true KR900016555A (ko) | 1990-11-13 |
KR940008634B1 KR940008634B1 (ko) | 1994-09-24 |
Family
ID=14237686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019900003649A KR940008634B1 (ko) | 1989-04-18 | 1990-03-19 | 백호우용 유압회로 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5136846A (ko) |
EP (1) | EP0393342B1 (ko) |
JP (1) | JPH0751796B2 (ko) |
KR (1) | KR940008634B1 (ko) |
DE (1) | DE69013556T2 (ko) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9425273D0 (en) * | 1994-12-14 | 1995-02-08 | Trinova Ltd | Hydraulic control system |
JP3681833B2 (ja) * | 1996-09-19 | 2005-08-10 | ヤンマー株式会社 | 掘削旋回作業機の油圧回路 |
US6408676B1 (en) | 1999-03-31 | 2002-06-25 | Caterpillar Inc. | Method and apparatus for determining the status of a relief valve |
US6430850B1 (en) * | 2000-07-25 | 2002-08-13 | Deere & Company | Seat switch activated pump |
JP3992612B2 (ja) * | 2002-12-26 | 2007-10-17 | 株式会社クボタ | バックホウの油圧回路構造 |
US7047735B2 (en) * | 2004-07-30 | 2006-05-23 | Deere & Company | Increasing hydraulic flow to tractor attachments |
US8051651B2 (en) * | 2007-08-30 | 2011-11-08 | Coneqtec Corp. | Hydraulic flow control system |
US8001751B2 (en) * | 2007-09-14 | 2011-08-23 | Cnh America Llc | Method for gradually relieving pressure in a hydraulic system utilizing reverse fluid flow through a pump of the system |
CN112969869B (zh) * | 2018-11-01 | 2022-08-05 | Kyb株式会社 | 工作流体供给装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2003740C3 (de) * | 1970-01-28 | 1981-05-07 | Robert Bosch Gmbh, 7000 Stuttgart | Hydraulikanlage mit wenigstens zwei Pumpen |
US3922855A (en) * | 1971-12-13 | 1975-12-02 | Caterpillar Tractor Co | Hydraulic circuitry for an excavator |
US3910044A (en) * | 1973-08-24 | 1975-10-07 | Case Co J I | Hydraulic summating system |
FR2250908B3 (ko) * | 1973-11-14 | 1977-08-12 | Massey Ferguson Services Nv | |
US4024797A (en) * | 1975-10-28 | 1977-05-24 | Caterpillar Tractor Co. | Spring centered balanced resolver valve |
JPS5831485B2 (ja) * | 1978-08-23 | 1983-07-06 | 株式会社神戸製鋼所 | 合流ポンプ方式の油圧回路におけるアンロ−ド機構 |
JPS5965607A (ja) * | 1982-10-06 | 1984-04-13 | Hitachi Constr Mach Co Ltd | 油圧駆動装置 |
DE3245728A1 (de) * | 1982-12-10 | 1984-06-14 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Gleichlaufsteuerung, insbesondere fuer die hauptstationszylinder einer rohrvorpresseinrichtung |
JPS6231166A (ja) * | 1985-08-01 | 1987-02-10 | Res Dev Corp Of Japan | ゲ−ト埋込形半導体素子 |
EP0235545B1 (en) * | 1986-01-25 | 1990-09-12 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system |
JPH078601Y2 (ja) * | 1987-11-10 | 1995-03-01 | 株式会社クボタ | バックホウの油圧回路 |
US4986075A (en) * | 1988-07-26 | 1991-01-22 | Kubota, Ltd. | Hydraulic circuit for backhoe |
-
1989
- 1989-04-18 JP JP1099072A patent/JPH0751796B2/ja not_active Expired - Lifetime
-
1990
- 1990-03-09 EP EP90104542A patent/EP0393342B1/en not_active Expired - Lifetime
- 1990-03-09 DE DE69013556T patent/DE69013556T2/de not_active Expired - Fee Related
- 1990-03-16 US US07/495,270 patent/US5136846A/en not_active Expired - Lifetime
- 1990-03-19 KR KR1019900003649A patent/KR940008634B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPH02279830A (ja) | 1990-11-15 |
JPH0751796B2 (ja) | 1995-06-05 |
EP0393342B1 (en) | 1994-10-26 |
US5136846A (en) | 1992-08-11 |
EP0393342A2 (en) | 1990-10-24 |
EP0393342A3 (en) | 1991-06-12 |
KR940008634B1 (ko) | 1994-09-24 |
DE69013556T2 (de) | 1995-03-02 |
DE69013556D1 (de) | 1994-12-01 |
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A201 | Request for examination | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
LAPS | Lapse due to unpaid annual fee |