EP0919670A4 - Device for reducing a shock at a stroke end of a 2-piece boom type construction machine - Google Patents

Device for reducing a shock at a stroke end of a 2-piece boom type construction machine

Info

Publication number
EP0919670A4
EP0919670A4 EP97930798A EP97930798A EP0919670A4 EP 0919670 A4 EP0919670 A4 EP 0919670A4 EP 97930798 A EP97930798 A EP 97930798A EP 97930798 A EP97930798 A EP 97930798A EP 0919670 A4 EP0919670 A4 EP 0919670A4
Authority
EP
European Patent Office
Prior art keywords
shock
reducing
construction machine
stroke end
type construction
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.)
Withdrawn
Application number
EP97930798A
Other languages
German (de)
French (fr)
Other versions
EP0919670A1 (en
Inventor
Noritaka Nagata
Takeshi Nakamori
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Publication of EP0919670A1 publication Critical patent/EP0919670A1/en
Publication of EP0919670A4 publication Critical patent/EP0919670A4/en
Withdrawn legal-status Critical Current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
    • E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
    • E02F9/2214—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing the shock generated at the stroke end
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/301—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom with more than two arms (boom included), e.g. two-part boom with additional dipper-arm
    • 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
    • E02F9/2025—Particular purposes of control systems not otherwise provided for
    • 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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
EP97930798A 1996-07-19 1997-07-15 Device for reducing a shock at a stroke end of a 2-piece boom type construction machine Withdrawn EP0919670A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP19090196A JP3734189B2 (en) 1996-07-19 1996-07-19 Stroke end shock reduction device for 2-piece boom type construction machinery
JP190901/96 1996-07-19
PCT/JP1997/002450 WO1998003739A1 (en) 1996-07-19 1997-07-15 Device for reducing a shock at a stroke end of a 2-piece boom type construction machine

Publications (2)

Publication Number Publication Date
EP0919670A1 EP0919670A1 (en) 1999-06-02
EP0919670A4 true EP0919670A4 (en) 2000-04-05

Family

ID=16265610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97930798A Withdrawn EP0919670A4 (en) 1996-07-19 1997-07-15 Device for reducing a shock at a stroke end of a 2-piece boom type construction machine

Country Status (4)

Country Link
EP (1) EP0919670A4 (en)
JP (1) JP3734189B2 (en)
KR (1) KR980009676A (en)
WO (1) WO1998003739A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100598111B1 (en) 2004-12-20 2006-07-07 삼성전자주식회사 Regulator and method supplying gas with this
KR100974275B1 (en) 2007-12-17 2010-08-06 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 shock absorption device and method thereof for excavator
KR101911090B1 (en) * 2011-12-27 2018-10-25 두산인프라코어 주식회사 Apparatus of positon calibration for increase of salvage power
CN102591221B (en) * 2012-02-07 2014-07-09 三一汽车制造有限公司 Controller, control system and method of multi-section arm support equipment, and engineering machinery equipment
KR200475536Y1 (en) * 2013-12-30 2014-12-09 두산인프라코어 주식회사 Unlocking device of auto idle of excavator with articulated boom
JP6571679B2 (en) 2014-04-25 2019-09-04 トランスレイト バイオ， インコーポレイテッド Method for purifying messenger RNA
KR102054666B1 (en) * 2017-04-06 2020-01-22 두산인프라코어 주식회사 Method of controlling an oil amount of a construction machine and system for performing the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910673A (en) * 1987-05-29 1990-03-20 Hitachi Construction Machinery Co., Ltd. Apparatus for controlling arm movement of industrial vehicle
WO1995018272A1 (en) * 1993-12-28 1995-07-06 Komatsu Ltd. Working machine control device for a construction
EP0671511A2 (en) * 1994-03-07 1995-09-13 Hitachi Construction Machinery Co., Ltd. Swing type excavator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0257703A (en) * 1988-08-18 1990-02-27 Kobe Steel Ltd Controlling method for hydraulic cylinder
JPH02253002A (en) * 1989-03-27 1990-10-11 Hitachi Constr Mach Co Ltd Hydraulic circuit of working machine
JPH02135779U (en) * 1989-04-15 1990-11-13
JPH02279841A (en) * 1989-04-19 1990-11-15 Yutani Heavy Ind Ltd Hydraulic shock absorbing controller of construction equipment
JPH02279838A (en) * 1989-04-19 1990-11-15 Yutani Heavy Ind Ltd Hydraulic shock absorption-controlling device for construction machine
JPH02292420A (en) * 1989-05-08 1990-12-03 Hitachi Constr Mach Co Ltd Trouble diagnostic device for construction equipment
JPH03257229A (en) * 1990-03-07 1991-11-15 Kubota Corp Controller of backhoe
JP3012461B2 (en) * 1994-09-09 2000-02-21 株式会社クボタ Backhoe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910673A (en) * 1987-05-29 1990-03-20 Hitachi Construction Machinery Co., Ltd. Apparatus for controlling arm movement of industrial vehicle
WO1995018272A1 (en) * 1993-12-28 1995-07-06 Komatsu Ltd. Working machine control device for a construction
EP0671511A2 (en) * 1994-03-07 1995-09-13 Hitachi Construction Machinery Co., Ltd. Swing type excavator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9803739A1 *

Also Published As

Publication number Publication date
KR980009676A (en) 1998-04-30
JPH1037246A (en) 1998-02-10
JP3734189B2 (en) 2006-01-11
EP0919670A1 (en) 1999-06-02
WO1998003739A1 (en) 1998-01-29

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