JPS56142942A - Hydraulic circuit apparatus in excavator - Google Patents

Hydraulic circuit apparatus in excavator

Info

Publication number
JPS56142942A
JPS56142942A JP4774680A JP4774680A JPS56142942A JP S56142942 A JPS56142942 A JP S56142942A JP 4774680 A JP4774680 A JP 4774680A JP 4774680 A JP4774680 A JP 4774680A JP S56142942 A JPS56142942 A JP S56142942A
Authority
JP
Japan
Prior art keywords
over valve
oil
switch
motor
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.)
Granted
Application number
JP4774680A
Other languages
Japanese (ja)
Other versions
JPS6221095B2 (en
Inventor
Yoichi Origuchi
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.)
Yanmar Agribusiness Co Ltd
Original Assignee
Seirei Industry 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 Seirei Industry Co Ltd filed Critical Seirei Industry Co Ltd
Priority to JP4774680A priority Critical patent/JPS56142942A/en
Publication of JPS56142942A publication Critical patent/JPS56142942A/en
Publication of JPS6221095B2 publication Critical patent/JPS6221095B2/ja
Granted legal-status Critical Current

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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To operate the slewing motion and the elevating motion of an excavating device simultaneously by a method wherein the switch-over valve controlling the slewing motor and the arm switch-over valve controlling the hydraulic cylinder equipped at the intermediate arm of the excavating device, are arranged in series. CONSTITUTION:The pressure oil from an oil pump P1 is supplied through the working oil path 9a of a working circuit 9 to an oil motor 2' for revolution. Further, the pressure oil is circulated through a side-path 9b returning from the motor 2' entered into a slewing switch-over valve 2a, then through a supply path 16 to an arm switch-over valve 5a at downstream. As the pressure oil is supplied through series path 14 to the arm switch-over valve 5a, when the switch-over valve 5a is in the work position, the oil is supplied to a hydraulic cylinder 5' through working circuit 10 and the hydraulic cylinder 5' is functioned. Thus, after driven the motor 2', the returning oil is supplied to the arm switch-over valve 5a and driven the motor 2' and the hydraulic cylinder 5' simultaneously.
JP4774680A 1980-04-09 1980-04-09 Hydraulic circuit apparatus in excavator Granted JPS56142942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4774680A JPS56142942A (en) 1980-04-09 1980-04-09 Hydraulic circuit apparatus in excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4774680A JPS56142942A (en) 1980-04-09 1980-04-09 Hydraulic circuit apparatus in excavator

Publications (2)

Publication Number Publication Date
JPS56142942A true JPS56142942A (en) 1981-11-07
JPS6221095B2 JPS6221095B2 (en) 1987-05-11

Family

ID=12783907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4774680A Granted JPS56142942A (en) 1980-04-09 1980-04-09 Hydraulic circuit apparatus in excavator

Country Status (1)

Country Link
JP (1) JPS56142942A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58118305A (en) * 1981-12-28 1983-07-14 Daikin Ind Ltd Hydraulic circuit
JPS58127206U (en) * 1982-02-23 1983-08-29 株式会社ナブコ pressure fluid circuit
JPS59106705A (en) * 1982-12-13 1984-06-20 Sumitomo Heavy Ind Ltd Hydraulic circuit for hydraulic shovel and the like

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01125387U (en) * 1988-02-18 1989-08-25

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58118305A (en) * 1981-12-28 1983-07-14 Daikin Ind Ltd Hydraulic circuit
JPH0143161B2 (en) * 1981-12-28 1989-09-19 Daikin Kogyo Co Ltd
JPS58127206U (en) * 1982-02-23 1983-08-29 株式会社ナブコ pressure fluid circuit
JPS59106705A (en) * 1982-12-13 1984-06-20 Sumitomo Heavy Ind Ltd Hydraulic circuit for hydraulic shovel and the like

Also Published As

Publication number Publication date
JPS6221095B2 (en) 1987-05-11

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