JPS643304A - Driving controller for hydraulic machine - Google Patents

Driving controller for hydraulic machine

Info

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
Application number
JP19373987A
Other languages
Japanese (ja)
Other versions
JPH0826885B2 (en
Inventor
Ichiro Hirami
Masakazu Haga
Masaki Egashira
Toichi Hirata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP62193739A priority Critical patent/JPH0826885B2/en
Publication of JPS643304A publication Critical patent/JPS643304A/en
Publication of JPH0826885B2 publication Critical patent/JPH0826885B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Fluid-Pressure Circuits (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.
JP62193739A 1987-03-27 1987-08-04 Drive controller for hydraulic machine Expired - Fee Related JPH0826885B2 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146605U (en) * 1985-03-05 1986-09-10

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146605U (en) * 1985-03-05 1986-09-10

Cited By (5)

* Cited by examiner, † Cited by third party
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