ATE401464T1 - WORKING MACHINE - Google Patents

WORKING MACHINE

Info

Publication number
ATE401464T1
ATE401464T1 AT06113452T AT06113452T ATE401464T1 AT E401464 T1 ATE401464 T1 AT E401464T1 AT 06113452 T AT06113452 T AT 06113452T AT 06113452 T AT06113452 T AT 06113452T AT E401464 T1 ATE401464 T1 AT E401464T1
Authority
AT
Austria
Prior art keywords
travelling
communication path
pressure
working
during
Prior art date
Application number
AT06113452T
Other languages
German (de)
Inventor
Yutaka Toji
Yoichiro Yamazaki
Hidekazu Oka
Koji Ueda
Original Assignee
Kobelco Constr Machinery 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 Kobelco Constr Machinery Ltd filed Critical Kobelco Constr Machinery Ltd
Application granted granted Critical
Publication of ATE401464T1 publication Critical patent/ATE401464T1/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
    • E02F9/2221—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
    • E02F9/2253—Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump

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)
  • Soil Working Implements (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

A working machine includes a hydraulic control apparatus. In a straight travel valve (32) of the hydraulic control apparatus, a communication path (35) and a control valve (36) that opens and closes the communication path (35) are provided. During a combined operation of travelling operation and working operation, a working pressure (41) and a travelling pressure (42) are taken in as pilot pressures on either side of the control valve (36). During a small travelling operation in which the travelling operation amount is small, the communication path (35) is unconditionally closed. During a large travelling operation in which the travelling operation amount is large, if the working pressure (41) is higher than the travelling pressure (42), the communication path (35) is open, and if the working pressure (41) is lower than the travelling pressure (42), the communication path (35) is closed.
AT06113452T 2005-05-26 2006-05-03 WORKING MACHINE ATE401464T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005154632A JP2006329341A (en) 2005-05-26 2005-05-26 Hydraulic control unit of working machine

Publications (1)

Publication Number Publication Date
ATE401464T1 true ATE401464T1 (en) 2008-08-15

Family

ID=36888907

Family Applications (1)

Application Number Title Priority Date Filing Date
AT06113452T ATE401464T1 (en) 2005-05-26 2006-05-03 WORKING MACHINE

Country Status (6)

Country Link
US (1) US20060265915A1 (en)
EP (1) EP1726723B1 (en)
JP (1) JP2006329341A (en)
CN (1) CN1869344A (en)
AT (1) ATE401464T1 (en)
DE (1) DE602006001783D1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006329248A (en) * 2005-05-24 2006-12-07 Kobelco Contstruction Machinery Ltd Hydraulic pressure supply device for working machine
US7559197B2 (en) * 2005-08-31 2009-07-14 Caterpillar Inc. Combiner valve control system and method
JP4380643B2 (en) * 2006-02-20 2009-12-09 コベルコ建機株式会社 Hydraulic control device for work machine
EP3133211B1 (en) * 2014-04-15 2020-08-19 Volvo Construction Equipment AB Drive control device for a construction machine
JP6282528B2 (en) * 2014-05-20 2018-02-21 住友建機株式会社 Construction machinery
CN106460880B (en) * 2014-12-16 2018-04-24 Ｋｙｂ株式会社 Fluid pressure control device for construction machine
JP6936687B2 (en) 2017-10-05 2021-09-22 ヤンマーパワーテクノロジー株式会社 Work vehicle
JP7141974B2 (en) * 2019-03-25 2022-09-26 日立建機株式会社 wheel loader
JP7342437B2 (en) * 2019-06-10 2023-09-12 コベルコ建機株式会社 working machine
JP7268504B2 (en) 2019-06-28 2023-05-08 コベルコ建機株式会社 hydraulic controller
JP7342456B2 (en) 2019-06-28 2023-09-12 コベルコ建機株式会社 hydraulic control device
US12352011B2 (en) * 2020-08-15 2025-07-08 Kubota Corporation Working machine
CN115823051B (en) * 2022-12-07 2026-02-10 江苏汇智高端工程机械创新中心有限公司 A linear motion system and a fully electrically controlled linear motion valve
JP2025080831A (en) * 2023-11-15 2025-05-27 キャタピラー エス エー アール エル Hydraulic circuits for construction machinery
WO2025178232A1 (en) * 2024-02-21 2025-08-28 볼보 컨스트럭션 이큅먼트 에이비 Hydraulic system for construction machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920006520B1 (en) * 1988-06-17 1992-08-07 가부시끼가이샤 고오베세이꼬오쇼 Powder shovel fluid control mechanism
JPH07122276B2 (en) * 1989-07-07 1995-12-25 油谷重工株式会社 Hydraulic pump control circuit for construction machinery
KR960021784A (en) * 1994-12-28 1996-07-18 김무 Straight line driving device of heavy equipment
JP3013225B2 (en) * 1995-01-11 2000-02-28 新キャタピラー三菱株式会社 Hanging work control device
JP4111286B2 (en) * 1998-06-30 2008-07-02 コベルコ建機株式会社 Construction machine traveling control method and apparatus
JP3491600B2 (en) * 2000-04-13 2004-01-26 コベルコ建機株式会社 Hydraulic control circuit for construction machinery
JP3614121B2 (en) * 2001-08-22 2005-01-26 コベルコ建機株式会社 Hydraulic equipment for construction machinery

Also Published As

Publication number Publication date
US20060265915A1 (en) 2006-11-30
DE602006001783D1 (en) 2008-08-28
EP1726723A2 (en) 2006-11-29
EP1726723B1 (en) 2008-07-16
CN1869344A (en) 2006-11-29
JP2006329341A (en) 2006-12-07
EP1726723A3 (en) 2007-01-31

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Legal Events

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