JPS5610801A - Double-system confluence circuit device - Google Patents

Double-system confluence circuit device

Info

Publication number
JPS5610801A
JPS5610801A JP8554879A JP8554879A JPS5610801A JP S5610801 A JPS5610801 A JP S5610801A JP 8554879 A JP8554879 A JP 8554879A JP 8554879 A JP8554879 A JP 8554879A JP S5610801 A JPS5610801 A JP S5610801A
Authority
JP
Japan
Prior art keywords
switching
valve
pump
pressurized oil
shut
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
JP8554879A
Other languages
Japanese (ja)
Inventor
Shuji Koiwai
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.)
KYB Corp
Original Assignee
Kayaba 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 Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Priority to JP8554879A priority Critical patent/JPS5610801A/en
Publication of JPS5610801A publication Critical patent/JPS5610801A/en
Pending 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
    • E02F9/2221—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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To permit the confluence of fluids from two pumps by the use of single switching valve in order to reduce the cost by providing a shut-off valve operating upon perceiving a change in oil pressure due to the operation of a switching valve for confluence.
CONSTITUTION: When switching the switching valves 21 or 22, pressurized oil from the pump P1 is supplied to the actuators 31 or 32, and return oil is recycled to the tank circuit 47. Also, when switching the swtiching valves 25W27 likewise, the actuators 35W37 are, respectively, driven by the pressurized oil from the pump P2. Subsequently, in case where the actuator 33, for example, is driven by the confluent fluids from the pumps P1 and P2, the switching valve 24 is situated at neutral position and the shut-off valve 56 is moved to the opened position 56A. And, when switching the switching valve 23, pressurized oil from the pump P1 is flowed into the actuator 33 through the check valve 53 and also the pressurized oil from the pump P2 is flowed into the actuator 33 through the center by-path circuit 42, the check valve 52, and the shut-off valve 56.
COPYRIGHT: (C)1981,JPO&Japio
JP8554879A 1979-07-06 1979-07-06 Double-system confluence circuit device Pending JPS5610801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8554879A JPS5610801A (en) 1979-07-06 1979-07-06 Double-system confluence circuit device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8554879A JPS5610801A (en) 1979-07-06 1979-07-06 Double-system confluence circuit device

Publications (1)

Publication Number Publication Date
JPS5610801A true JPS5610801A (en) 1981-02-03

Family

ID=13861893

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8554879A Pending JPS5610801A (en) 1979-07-06 1979-07-06 Double-system confluence circuit device

Country Status (1)

Country Link
JP (1) JPS5610801A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614475A (en) * 1981-05-02 1986-09-30 Hitachi Construction Machinery Company, Inc. Hydraulic circuit system for civil engineering and architectural machinery
US4961371A (en) * 1987-11-10 1990-10-09 Kubota, Ltd. Hydraulic circuit for a backhoe
JPH0610909A (en) * 1993-03-30 1994-01-21 Kayaba Ind Co Ltd Oil pressure control circuit
JPH08100806A (en) * 1994-11-10 1996-04-16 Kayaba Ind Co Ltd Hydraulic control circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146679A (en) * 1974-10-19 1976-04-21 Uchida Yuatsu Kiki Kogyo Kk 2 ryuryogoryukairosochi

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5146679A (en) * 1974-10-19 1976-04-21 Uchida Yuatsu Kiki Kogyo Kk 2 ryuryogoryukairosochi

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614475A (en) * 1981-05-02 1986-09-30 Hitachi Construction Machinery Company, Inc. Hydraulic circuit system for civil engineering and architectural machinery
US4961371A (en) * 1987-11-10 1990-10-09 Kubota, Ltd. Hydraulic circuit for a backhoe
JPH0610909A (en) * 1993-03-30 1994-01-21 Kayaba Ind Co Ltd Oil pressure control circuit
JPH08100806A (en) * 1994-11-10 1996-04-16 Kayaba Ind Co Ltd Hydraulic control circuit

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