JPS643304A - Driving controller for hydraulic machine - Google Patents
Driving controller for hydraulic machineInfo
- Publication number
- JPS643304A JPS643304A JP19373987A JP19373987A JPS643304A JP S643304 A JPS643304 A JP S643304A JP 19373987 A JP19373987 A JP 19373987A JP 19373987 A JP19373987 A JP 19373987A JP S643304 A JPS643304 A JP S643304A
- Authority
- JP
- Japan
- Prior art keywords
- neutral position
- unexpected
- control unit
- control valve
- signal
- 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
Landscapes
- Component Parts Of Construction Machinery (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
PURPOSE:To avoid any unexpected peril by outputting a fault signal when an operation device is in its neutral position and a signal is output from a control unit to a control valve. CONSTITUTION:A neutral position detector 10 is provided on an operation lever 6, while electric current detectors 11a, 11b are provided on a circuit which connects a control unit 7 to a control valve 5. Signals from these detectors 10, 11a, 11b are connected to an indicator lamp 16 through an AND circuit 13. When the operation lever 6 is in its neutral position, therefore, and a signal is output from the control unit 7 to the control valve 5, failure can be noticed by means of the indicator lamp 16. An operator can acknowledge an unexpected motion of a hydraulic actuator 4 in a neutral position of the operation device, and thereby any unexpected peril can be avoided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193739A JPH0826885B2 (en) | 1987-03-27 | 1987-08-04 | Drive controller for hydraulic machine |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7176087 | 1987-03-27 | ||
JP62-71760 | 1987-03-27 | ||
JP62193739A JPH0826885B2 (en) | 1987-03-27 | 1987-08-04 | Drive controller for hydraulic machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS643304A true JPS643304A (en) | 1989-01-09 |
JPH0826885B2 JPH0826885B2 (en) | 1996-03-21 |
Family
ID=26412859
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62193739A Expired - Fee Related JPH0826885B2 (en) | 1987-03-27 | 1987-08-04 | Drive controller for hydraulic machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0826885B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994027052A1 (en) * | 1993-05-07 | 1994-11-24 | Hitachi Construction Machinery Co., Ltd. | Driving controller of hydraulic machine |
JP2005273894A (en) * | 2004-03-22 | 2005-10-06 | Volvo Construction Equipment Holding Sweden Ab | Operation lever mis-operation prevention system of construction heavy equipment |
KR20200111816A (en) * | 2018-09-27 | 2020-09-29 | 히다치 겡키 가부시키 가이샤 | Working machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61146605U (en) * | 1985-03-05 | 1986-09-10 |
-
1987
- 1987-08-04 JP JP62193739A patent/JPH0826885B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61146605U (en) * | 1985-03-05 | 1986-09-10 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994027052A1 (en) * | 1993-05-07 | 1994-11-24 | Hitachi Construction Machinery Co., Ltd. | Driving controller of hydraulic machine |
US5497805A (en) * | 1993-05-07 | 1996-03-12 | Hitachi Construction Machinery Co., Ltd. | Drive control system for hydraulic machine |
JP2005273894A (en) * | 2004-03-22 | 2005-10-06 | Volvo Construction Equipment Holding Sweden Ab | Operation lever mis-operation prevention system of construction heavy equipment |
KR20200111816A (en) * | 2018-09-27 | 2020-09-29 | 히다치 겡키 가부시키 가이샤 | Working machine |
EP3751059A4 (en) * | 2018-09-27 | 2021-11-24 | Hitachi Construction Machinery Co., Ltd. | Work machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0826885B2 (en) | 1996-03-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |