JPS55138523A - Posture control system for slewing excavator - Google Patents
Posture control system for slewing excavatorInfo
- Publication number
- JPS55138523A JPS55138523A JP4428779A JP4428779A JPS55138523A JP S55138523 A JPS55138523 A JP S55138523A JP 4428779 A JP4428779 A JP 4428779A JP 4428779 A JP4428779 A JP 4428779A JP S55138523 A JPS55138523 A JP S55138523A
- Authority
- JP
- Japan
- Prior art keywords
- inclination
- signals
- servo
- cylinders
- valves
- 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
Landscapes
- Operation Control Of Excavators (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
PURPOSE: To prevent various kinds of adverse effects of external-force moments by a method wherein an automatic posture control is conducted so that an upper slewing body always slew horizontally even in a work at an inclined terrain.
CONSTITUTION: When a slewing excavator 1 is moved onto an inclined terrain, a sensor 27 attached to an swing circle support drum detects an inclination in a traveling direction of the vehicle, a sensor 28 attached to an inner drum detects an inclination in a direction perpendicular to the traveling direction, and the inclination signals are input into a decision circuit 29. The circuit 29 compares the inclination signals with set values, and generates difference signals, which are amplified by amplifiers 30, 31 and then input into servo-valves 23, 24. The servo-valves 23, 24 control the flow rates of oil fed to cylinders 18, 14 in accordance with the difference signals. By functions of the cylinders 18 and 14, an upper slewing body is controlled in posture so that it is kept horizontal.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4428779A JPS55138523A (en) | 1979-04-13 | 1979-04-13 | Posture control system for slewing excavator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4428779A JPS55138523A (en) | 1979-04-13 | 1979-04-13 | Posture control system for slewing excavator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55138523A true JPS55138523A (en) | 1980-10-29 |
Family
ID=12687282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4428779A Pending JPS55138523A (en) | 1979-04-13 | 1979-04-13 | Posture control system for slewing excavator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55138523A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60253630A (en) * | 1984-05-29 | 1985-12-14 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for rocking of slewing body of slewing working vehicle |
JPS6176870U (en) * | 1984-10-26 | 1986-05-23 | ||
JPH0379367U (en) * | 1989-12-05 | 1991-08-13 | ||
KR19980041619A (en) * | 1996-11-30 | 1998-08-17 | 이해규 | Horizontal retaining device of construction equipment |
JP2009085002A (en) * | 2007-10-02 | 2009-04-23 | Volvo Construction Equipment Ab | Automatic leveling control system for construction machine, and its control method |
JP2009085003A (en) * | 2007-10-02 | 2009-04-23 | Volvo Construction Equipment Ab | Image display system of construction machine with leveling means |
JP2009114849A (en) * | 2007-11-07 | 2009-05-28 | Volvo Construction Equipment Ab | Forestry machine and leveling apparatus for excavator |
JP2009144504A (en) * | 2007-12-17 | 2009-07-02 | Volvo Construction Equipment Ab | Hydraulic system for leveling apparatus in excavator and forestry machine |
JP2009144503A (en) * | 2007-12-13 | 2009-07-02 | Volvo Construction Equipment Ab | Manual leveling system and method for construction equipment |
JP2009144502A (en) * | 2007-12-12 | 2009-07-02 | Volvo Construction Equipment Ab | Levelling control system and method for construction equipment |
JP2012062684A (en) * | 2010-09-16 | 2012-03-29 | Toa Harbor Works Co Ltd | Posture control device of underwater backhoe |
JP2016000930A (en) * | 2014-06-12 | 2016-01-07 | 東亜建設工業株式会社 | Water bottom ground excavator and water bottom ground excavation system |
JP2019044370A (en) * | 2017-08-30 | 2019-03-22 | 日立建機株式会社 | Construction machine |
WO2020166241A1 (en) * | 2019-02-14 | 2020-08-20 | コベルコ建機株式会社 | Monitoring device and construction machine |
-
1979
- 1979-04-13 JP JP4428779A patent/JPS55138523A/en active Pending
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60253630A (en) * | 1984-05-29 | 1985-12-14 | Hitachi Constr Mach Co Ltd | Oil-pressure circuit for rocking of slewing body of slewing working vehicle |
JPS6176870U (en) * | 1984-10-26 | 1986-05-23 | ||
JPH0379367U (en) * | 1989-12-05 | 1991-08-13 | ||
KR19980041619A (en) * | 1996-11-30 | 1998-08-17 | 이해규 | Horizontal retaining device of construction equipment |
JP2009085002A (en) * | 2007-10-02 | 2009-04-23 | Volvo Construction Equipment Ab | Automatic leveling control system for construction machine, and its control method |
JP2009085003A (en) * | 2007-10-02 | 2009-04-23 | Volvo Construction Equipment Ab | Image display system of construction machine with leveling means |
JP2009114849A (en) * | 2007-11-07 | 2009-05-28 | Volvo Construction Equipment Ab | Forestry machine and leveling apparatus for excavator |
EP2058438A3 (en) * | 2007-11-07 | 2013-03-06 | Volvo Construction Equipment Holding Sweden AB | Leveling apparatus for excavator and forestry machine equipment |
JP2009144502A (en) * | 2007-12-12 | 2009-07-02 | Volvo Construction Equipment Ab | Levelling control system and method for construction equipment |
JP2009144503A (en) * | 2007-12-13 | 2009-07-02 | Volvo Construction Equipment Ab | Manual leveling system and method for construction equipment |
JP2009144504A (en) * | 2007-12-17 | 2009-07-02 | Volvo Construction Equipment Ab | Hydraulic system for leveling apparatus in excavator and forestry machine |
JP2012062684A (en) * | 2010-09-16 | 2012-03-29 | Toa Harbor Works Co Ltd | Posture control device of underwater backhoe |
JP2016000930A (en) * | 2014-06-12 | 2016-01-07 | 東亜建設工業株式会社 | Water bottom ground excavator and water bottom ground excavation system |
JP2019044370A (en) * | 2017-08-30 | 2019-03-22 | 日立建機株式会社 | Construction machine |
WO2020166241A1 (en) * | 2019-02-14 | 2020-08-20 | コベルコ建機株式会社 | Monitoring device and construction machine |
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