JPH0175165U - - Google Patents
Info
- Publication number
- JPH0175165U JPH0175165U JP1987172150U JP17215087U JPH0175165U JP H0175165 U JPH0175165 U JP H0175165U JP 1987172150 U JP1987172150 U JP 1987172150U JP 17215087 U JP17215087 U JP 17215087U JP H0175165 U JPH0175165 U JP H0175165U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- multiple valve
- pump
- parallel
- bypass path
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000203 mixture Substances 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
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
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
-
- 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
-
- 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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant capacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check valves
- F15B2211/3051—Cross-check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7135—Combinations of output members of different types, e.g. single-acting cylinders with rotary motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987172150U JPH078601Y2 (ja) | 1987-11-10 | 1987-11-10 | バックホウの油圧回路 |
US07/267,607 US4961371A (en) | 1987-11-10 | 1988-11-07 | Hydraulic circuit for a backhoe |
GB8826154A GB2212250B (en) | 1987-11-10 | 1988-11-08 | Hydraulic circuit for a backhoe |
FR888814593A FR2622936B1 (fr) | 1987-11-10 | 1988-11-08 | Circuit hydraulique pour une pelle retrocaveuse |
DE3838006A DE3838006A1 (de) | 1987-11-10 | 1988-11-09 | Hydraulische steuereinrichtung fuer einen bagger |
KR1019880014798A KR920005500B1 (ko) | 1987-11-10 | 1988-11-10 | 백 호우의 유압회로 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987172150U JPH078601Y2 (ja) | 1987-11-10 | 1987-11-10 | バックホウの油圧回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0175165U true JPH0175165U (US06811534-20041102-M00003.png) | 1989-05-22 |
JPH078601Y2 JPH078601Y2 (ja) | 1995-03-01 |
Family
ID=15936492
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987172150U Expired - Lifetime JPH078601Y2 (ja) | 1987-11-10 | 1987-11-10 | バックホウの油圧回路 |
Country Status (6)
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018071572A (ja) * | 2016-10-25 | 2018-05-10 | 株式会社竹内製作所 | 油圧式走行装置 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0751796B2 (ja) * | 1989-04-18 | 1995-06-05 | 株式会社クボタ | バックホウの油圧回路 |
US5106256A (en) * | 1989-08-07 | 1992-04-21 | Kabushiki Kaisha Kobe Seiko Sho | Step device in miniature shovel car |
US5115835A (en) * | 1990-01-26 | 1992-05-26 | Zexel Corporation | Stacked type hydraulic control valve system |
AU720849B2 (en) * | 1996-03-28 | 2000-06-15 | Clark Equipment Company | Multifunction valve stack |
US6018895A (en) * | 1996-03-28 | 2000-02-01 | Clark Equipment Company | Valve stack in a mini-excavator directing fluid under pressure from multiple pumps to actuable elements |
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 |
KR100804665B1 (ko) * | 2000-09-12 | 2008-02-20 | 얀마 가부시키가이샤 | 굴착선회 작업차의 유압회로 |
JP4569940B2 (ja) * | 2001-06-20 | 2010-10-27 | ヤンマー株式会社 | バックホーの油圧回路 |
EP2157245B1 (en) * | 2008-08-21 | 2021-03-17 | Volvo Construction Equipment AB | Hydraulic system for construction equipment |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2912131A (en) * | 1957-10-01 | 1959-11-10 | Demag Baggerfabrik Gmbh | Hydraulically operated machines |
US3208221A (en) * | 1963-09-30 | 1965-09-28 | Drott Mfg Corp | Hydraulic operating apparatus |
DE1634915C3 (de) * | 1967-03-10 | 1981-02-12 | O & K Orenstein & Koppel Ag | Schaltung für Hydraulikbagger |
US3922855A (en) * | 1971-12-13 | 1975-12-02 | Caterpillar Tractor Co | Hydraulic circuitry for an excavator |
JPS5370285A (en) * | 1976-12-02 | 1978-06-22 | Caterpillar Tractor Co | Device for hydraulic pressure |
US4171054A (en) * | 1976-12-28 | 1979-10-16 | Kubota, Ltd. | Work vehicle with hydraulic circuit for swivel motor and work assembly arm motor |
US4207740A (en) * | 1979-06-12 | 1980-06-17 | Akermans Verkstad Ab | Valve blocks, in particular for hydraulic excavators |
JPS5610801A (en) * | 1979-07-06 | 1981-02-03 | Kayaba Ind Co Ltd | Double-system confluence circuit device |
JPS6129813Y2 (US06811534-20041102-M00003.png) * | 1980-07-07 | 1986-09-02 | ||
US4561824A (en) * | 1981-03-03 | 1985-12-31 | Hitachi, Ltd. | Hydraulic drive system for civil engineering and construction machinery |
KR870000506B1 (ko) * | 1981-05-02 | 1987-03-12 | 니시모도 후미히라(西元文平) | 토목 건설기계의 유압회로 시스템 |
JPS58146630A (ja) * | 1982-02-25 | 1983-09-01 | Hitachi Constr Mach Co Ltd | 油圧作業機械の油圧回路 |
-
1987
- 1987-11-10 JP JP1987172150U patent/JPH078601Y2/ja not_active Expired - Lifetime
-
1988
- 1988-11-07 US US07/267,607 patent/US4961371A/en not_active Expired - Lifetime
- 1988-11-08 GB GB8826154A patent/GB2212250B/en not_active Expired - Lifetime
- 1988-11-08 FR FR888814593A patent/FR2622936B1/fr not_active Expired - Lifetime
- 1988-11-09 DE DE3838006A patent/DE3838006A1/de active Granted
- 1988-11-10 KR KR1019880014798A patent/KR920005500B1/ko not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018071572A (ja) * | 2016-10-25 | 2018-05-10 | 株式会社竹内製作所 | 油圧式走行装置 |
Also Published As
Publication number | Publication date |
---|---|
JPH078601Y2 (ja) | 1995-03-01 |
GB2212250A (en) | 1989-07-19 |
GB8826154D0 (en) | 1988-12-14 |
DE3838006C2 (US06811534-20041102-M00003.png) | 1992-01-09 |
US4961371A (en) | 1990-10-09 |
DE3838006A1 (de) | 1989-05-18 |
FR2622936A1 (fr) | 1989-05-12 |
KR890008407A (ko) | 1989-07-10 |
FR2622936B1 (fr) | 1992-09-04 |
GB2212250B (en) | 1991-02-20 |
KR920005500B1 (ko) | 1992-07-06 |