JPS5758739A - Construction machinery such as power shovel - Google Patents
Construction machinery such as power shovelInfo
- Publication number
- JPS5758739A JPS5758739A JP55133456A JP13345680A JPS5758739A JP S5758739 A JPS5758739 A JP S5758739A JP 55133456 A JP55133456 A JP 55133456A JP 13345680 A JP13345680 A JP 13345680A JP S5758739 A JPS5758739 A JP S5758739A
- Authority
- JP
- Japan
- Prior art keywords
- discharge amount
- power
- fluid
- horse power
- 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.)
- Pending
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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE:To prevent the overloading of a prime mover for a avoiding the accurrence of disorder by reducing required horse power by reducing discharge amount by supplying fluid to the discharge amount controller of a variable pump when the required horse power of the variable pump is larger than a set horse power. CONSTITUTION:In the power unit 33 of oil-pressure circuit in which fluid is supplied to each actuator of power shovel by valve units 31 and 32, horse power control valves 133a and 133b to be operated by the discharge pressure signals of the pumps 131a and 131b and feedback signal of discharge amount are provided. When the required horse powe of each pump is larger than a set horse power, fluid is supplied through the control valves 133a and 133b to the discharge amount controller of the pumps 131a and 131b in order to reduce its required horse power. Also, in the reverse case, fluid is supplied through power matching valves 132a and 132b to the discharge amount controller to reduce the discharge amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55133456A JPS5758739A (en) | 1980-09-24 | 1980-09-24 | Construction machinery such as power shovel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55133456A JPS5758739A (en) | 1980-09-24 | 1980-09-24 | Construction machinery such as power shovel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5758739A true JPS5758739A (en) | 1982-04-08 |
Family
ID=15105199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55133456A Pending JPS5758739A (en) | 1980-09-24 | 1980-09-24 | Construction machinery such as power shovel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5758739A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5116186A (en) * | 1988-08-02 | 1992-05-26 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling hydraulic cylinders of a power shovel |
| US5996701A (en) * | 1997-12-19 | 1999-12-07 | Komatsu Ltd. | Control method and system for construction machine |
-
1980
- 1980-09-24 JP JP55133456A patent/JPS5758739A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5116186A (en) * | 1988-08-02 | 1992-05-26 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling hydraulic cylinders of a power shovel |
| US5356259A (en) * | 1988-08-02 | 1994-10-18 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling hydraulic cylinders of a power shovel |
| US5996701A (en) * | 1997-12-19 | 1999-12-07 | Komatsu Ltd. | Control method and system for construction machine |
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