JPS57197333A - Oil-pressure circuit for oil-pressure shovel - Google Patents
Oil-pressure circuit for oil-pressure shovelInfo
- Publication number
- JPS57197333A JPS57197333A JP7935081A JP7935081A JPS57197333A JP S57197333 A JPS57197333 A JP S57197333A JP 7935081 A JP7935081 A JP 7935081A JP 7935081 A JP7935081 A JP 7935081A JP S57197333 A JPS57197333 A JP S57197333A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pressure
- handed
- motor
- supplied
- 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
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
- E02F9/2278—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
- 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)
- Operation Control Of Excavators (AREA)
Abstract
PURPOSE:To prevent the meandering running of an oil-pressure shovel by using a system in which left and right-handed running motors are connected in parallel with independent oil-pressure pumps, the discharge pipeline of each oil-pressure pump is connected to the other through an electromagnetic communication valve, and the valve is opened or closed by a switching valve. CONSTITUTION:Since an electromagnetic communication valve 23 is closed when operating left and right-handed running switch valves 14 and 18, the pressure oils of oil- pressure pumps 12 and 13 are supplied to each of left and right-handed running motors 6 and 7, whereupon the speeds of the left and right-handed motors 6 and 7 become values corresponding to the operation amounts of the valves 14 and 18. Under the condition, when operating a turning switch valve 16, for example, the communication valve 23 is opened. Therefore, part of the pressure oil of the oil-pressure pump 12 is supplied to the turning motor 8 and part of the pressure oil of the pump 13 is supplied to the left-handed motor 6 through the communication valve 23 even when the amount of pressure oil to be supplied to the left-handed motor 6 is reduced. By this, the reduction rate of the speed of the left-handed motor 6 is lessened, the amount of pressure oil to be supplied from the pump 13 to the right-handed motor 7 is reduced, and the speed of the right-haded motor 7 is also reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7935081A JPS57197333A (en) | 1981-05-27 | 1981-05-27 | Oil-pressure circuit for oil-pressure shovel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7935081A JPS57197333A (en) | 1981-05-27 | 1981-05-27 | Oil-pressure circuit for oil-pressure shovel |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57197333A true JPS57197333A (en) | 1982-12-03 |
JPH0128174B2 JPH0128174B2 (en) | 1989-06-01 |
Family
ID=13687447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7935081A Granted JPS57197333A (en) | 1981-05-27 | 1981-05-27 | Oil-pressure circuit for oil-pressure shovel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57197333A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61165429A (en) * | 1985-01-17 | 1986-07-26 | Yutani Juko Kk | Hydraulic circuit for construction machine |
JPS61165428A (en) * | 1985-01-17 | 1986-07-26 | Yutani Juko Kk | Hydraulic circuit for construction machine |
JPS6272356U (en) * | 1985-10-16 | 1987-05-09 | ||
JPS62117923A (en) * | 1985-11-15 | 1987-05-29 | Kobe Steel Ltd | Control circuit for traveling of construction machine |
JPH03144024A (en) * | 1989-10-31 | 1991-06-19 | Komatsu Ltd | Hydraulic circuit of hydraulic drilling machine |
EP2431538A1 (en) * | 2010-09-21 | 2012-03-21 | Kubota Corporation | Hydraulic system for working machine |
JP2014522465A (en) * | 2011-06-09 | 2014-09-04 | ボルボ コンストラクション イクイップメント アーベー | Hydraulic system for construction machinery |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5152190U (en) * | 1974-10-19 | 1976-04-20 | ||
JPS5323916U (en) * | 1976-08-06 | 1978-02-28 | ||
JPS5437036U (en) * | 1977-08-19 | 1979-03-10 | ||
JPS5437038U (en) * | 1977-08-18 | 1979-03-10 | ||
JPS5477501U (en) * | 1977-11-11 | 1979-06-01 | ||
JPS54106602U (en) * | 1978-01-12 | 1979-07-27 |
-
1981
- 1981-05-27 JP JP7935081A patent/JPS57197333A/en active Granted
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5152190U (en) * | 1974-10-19 | 1976-04-20 | ||
JPS5323916U (en) * | 1976-08-06 | 1978-02-28 | ||
JPS5437038U (en) * | 1977-08-18 | 1979-03-10 | ||
JPS5437036U (en) * | 1977-08-19 | 1979-03-10 | ||
JPS5477501U (en) * | 1977-11-11 | 1979-06-01 | ||
JPS54106602U (en) * | 1978-01-12 | 1979-07-27 |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61165429A (en) * | 1985-01-17 | 1986-07-26 | Yutani Juko Kk | Hydraulic circuit for construction machine |
JPS61165428A (en) * | 1985-01-17 | 1986-07-26 | Yutani Juko Kk | Hydraulic circuit for construction machine |
JPH0372769B2 (en) * | 1985-01-17 | 1991-11-19 | Yutani Juko Kk | |
JPH0577813B2 (en) * | 1985-01-17 | 1993-10-27 | Yutani Juko Kk | |
JPS6272356U (en) * | 1985-10-16 | 1987-05-09 | ||
JPH0352275Y2 (en) * | 1985-10-16 | 1991-11-12 | ||
JPS62117923A (en) * | 1985-11-15 | 1987-05-29 | Kobe Steel Ltd | Control circuit for traveling of construction machine |
JPH03144024A (en) * | 1989-10-31 | 1991-06-19 | Komatsu Ltd | Hydraulic circuit of hydraulic drilling machine |
EP2431538A1 (en) * | 2010-09-21 | 2012-03-21 | Kubota Corporation | Hydraulic system for working machine |
US8701399B2 (en) | 2010-09-21 | 2014-04-22 | Kubota Corporation | Hydraulic system for working machine |
JP2014522465A (en) * | 2011-06-09 | 2014-09-04 | ボルボ コンストラクション イクイップメント アーベー | Hydraulic system for construction machinery |
Also Published As
Publication number | Publication date |
---|---|
JPH0128174B2 (en) | 1989-06-01 |
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