JPS6474905A - Operation structure for working apparatus of farm tractor - Google Patents

Operation structure for working apparatus of farm tractor

Info

Publication number
JPS6474905A
JPS6474905A JP23034787A JP23034787A JPS6474905A JP S6474905 A JPS6474905 A JP S6474905A JP 23034787 A JP23034787 A JP 23034787A JP 23034787 A JP23034787 A JP 23034787A JP S6474905 A JPS6474905 A JP S6474905A
Authority
JP
Japan
Prior art keywords
speed
working apparatus
oil
flow
discharged
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
Application number
JP23034787A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Katayama
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP23034787A priority Critical patent/JPS6474905A/en
Publication of JPS6474905A publication Critical patent/JPS6474905A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lifting Devices For Agricultural Implements (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To enable the control of speed in a state to cause little change in speed by the change in weight of a coupled working apparatus, by connecting a flow-control port of a flow-priority valve to an oil tank and controlling the quantity of discharged oil from an excess flow port with a speed control valve. CONSTITUTION:The lowering speed of a coupled working apparatus in a low- speed mode is uniformized independent of the change in the weight of the working apparatus by uniforming the quantity of discharged oil by the action of a flow priority valve 9. The discharged oil quantity is controlled by the action of a speed control valve 14 to control the lowering speed and enable the quick and accurate lowering of the coupled working apparatus to the target position. The whole quantity of oil discharged from a hydraulic cylinder can be returned to an oil tank via the speed control valve without passing through the priority valve 9.
JP23034787A 1987-09-14 1987-09-14 Operation structure for working apparatus of farm tractor Pending JPS6474905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23034787A JPS6474905A (en) 1987-09-14 1987-09-14 Operation structure for working apparatus of farm tractor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23034787A JPS6474905A (en) 1987-09-14 1987-09-14 Operation structure for working apparatus of farm tractor

Publications (1)

Publication Number Publication Date
JPS6474905A true JPS6474905A (en) 1989-03-20

Family

ID=16906426

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23034787A Pending JPS6474905A (en) 1987-09-14 1987-09-14 Operation structure for working apparatus of farm tractor

Country Status (1)

Country Link
JP (1) JPS6474905A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011169380A (en) * 2010-02-17 2011-09-01 Kawasaki Heavy Ind Ltd Flow rate control valve with pressure compensation
US9788545B2 (en) 2013-10-22 2017-10-17 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods
US9788546B2 (en) 2013-10-22 2017-10-17 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods
US9801383B2 (en) 2013-10-22 2017-10-31 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods
US9801376B2 (en) 2013-10-22 2017-10-31 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods
US9808008B2 (en) 2013-10-22 2017-11-07 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011169380A (en) * 2010-02-17 2011-09-01 Kawasaki Heavy Ind Ltd Flow rate control valve with pressure compensation
US9788545B2 (en) 2013-10-22 2017-10-17 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods
US9788546B2 (en) 2013-10-22 2017-10-17 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods
US9801383B2 (en) 2013-10-22 2017-10-31 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods
US9801376B2 (en) 2013-10-22 2017-10-31 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods
US9808008B2 (en) 2013-10-22 2017-11-07 Dow Agrosciences Llc Synergistic pesticidal compositions and related methods

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