SE8001459L - CONSTRUCTION MACHINE DRIVER - Google Patents

CONSTRUCTION MACHINE DRIVER

Info

Publication number
SE8001459L
SE8001459L SE8001459A SE8001459A SE8001459L SE 8001459 L SE8001459 L SE 8001459L SE 8001459 A SE8001459 A SE 8001459A SE 8001459 A SE8001459 A SE 8001459A SE 8001459 L SE8001459 L SE 8001459L
Authority
SE
Sweden
Prior art keywords
hydraulic
actuator
actuators
pump
solenoid
Prior art date
Application number
SE8001459A
Other languages
Swedish (sv)
Other versions
SE448762B (en
Inventor
E Izumi
K Honma
K Abe
M Uno
K Nakajima
Original Assignee
Hitachi Construction Machinery
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
Priority claimed from JP2077679A external-priority patent/JPS55115606A/en
Priority claimed from JP8021279A external-priority patent/JPS566901A/en
Priority claimed from JP54134259A external-priority patent/JPS595166B2/en
Application filed by Hitachi Construction Machinery filed Critical Hitachi Construction Machinery
Publication of SE8001459L publication Critical patent/SE8001459L/en
Publication of SE448762B publication Critical patent/SE448762B/en

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
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • 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
    • E02F9/2242—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance including an electronic controller
    • 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

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

A drive system for construction machinery in which a hydraulic circuit is provided with a plurality of variable- displacement hydraulic pumps 1, 2, 3, 4 and a plurality of hydraulic actuators, each pump being connected in closed circuit to one or a plurality of the actuators via a solenoid-operated valve or valves to drive a movable member or members connected to the actuator or respective actuators when pressurized fluid is supplied to the actuator or actuators from the pump. At least one of the selected hydraulic actuators is further connected in closed circuit via a solenoid-operated valve to at least one of the hydraulic pumps other than the hydraulic pump which is connected in closed circuit to the hydraulic actuator. The hydraulic circuit means is controlled such that timing for switching the solenoid- operated valves is controlled in conjunction with the operation of the pump so as to absorb the shock which would otherwise be produced when each actuator is rendered operative and inoperative. The hydraulic circuit means is further controlled such that, when the operation speed of each hydraulic actuator is increased or reduced including the time at which the actuator is rendered operative and inoperative, the speed is adjusted in conformity with the inertia and operation characteristics of a movable member connected to the actuator. <IMAGE>
SE8001459A 1979-02-26 1980-02-25 HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINERY, INCLUDING A MULTIPLE CLOSED HYDRAULIC CIRCUITS SE448762B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2077679A JPS55115606A (en) 1979-02-26 1979-02-26 Closed hydraulic circuit for controlling operation of pump
JP8021279A JPS566901A (en) 1979-06-27 1979-06-27 Hydraulic circuit for construction equipment
JP54134259A JPS595166B2 (en) 1979-10-19 1979-10-19 Control method of pump control hydraulic circuit

Publications (2)

Publication Number Publication Date
SE8001459L true SE8001459L (en) 1980-08-27
SE448762B SE448762B (en) 1987-03-16

Family

ID=27283160

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8001459A SE448762B (en) 1979-02-26 1980-02-25 HYDRAULIC DRIVE DEVICE FOR CONSTRUCTION MACHINERY, INCLUDING A MULTIPLE CLOSED HYDRAULIC CIRCUITS

Country Status (4)

Country Link
DE (1) DE3007011C2 (en)
FR (1) FR2449751A1 (en)
GB (1) GB2045360B (en)
SE (1) SE448762B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197336A (en) * 1981-05-29 1982-12-03 Komatsu Ltd Oil-pressure circuit for turning excavator
JPS5817202A (en) * 1981-07-24 1983-02-01 Hitachi Constr Mach Co Ltd Control unit for hydraulic circuit
JPS5857504A (en) * 1981-10-02 1983-04-05 Hitachi Constr Mach Co Ltd Controller for hydraulic circuit
US4537029A (en) * 1982-09-23 1985-08-27 Vickers, Incorporated Power transmission
US5029067A (en) * 1987-01-30 1991-07-02 Kabushiki Kaisha Komatsu Seisakusho Operation control device
DE3704452A1 (en) * 1987-02-10 1988-08-18 Mannesmann Ag Hydraulic system for an excavator
GB2250108B (en) * 1990-10-31 1995-02-08 Samsung Heavy Ind Control system for automatically controlling actuators of an excavator
JP5572586B2 (en) * 2011-05-19 2014-08-13 日立建機株式会社 Hydraulic drive device for work machine
JP5973979B2 (en) 2013-11-21 2016-08-23 日立建機株式会社 Drive device for work machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2631530A1 (en) * 1976-07-14 1978-01-19 Weserhuette Ag Eisenwerk Control system for hydraulically driven excavator - has minimal number of operating levers for interlocked individual circuits

Also Published As

Publication number Publication date
DE3007011C2 (en) 1987-01-02
FR2449751B1 (en) 1985-04-12
GB2045360B (en) 1982-12-08
DE3007011A1 (en) 1981-01-15
GB2045360A (en) 1980-10-29
SE448762B (en) 1987-03-16
FR2449751A1 (en) 1980-09-19

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