KR101741702B1 - 플로팅 기능이 구비된 건설기계 - Google Patents

플로팅 기능이 구비된 건설기계 Download PDF

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Publication number
KR101741702B1
KR101741702B1 KR1020157015833A KR20157015833A KR101741702B1 KR 101741702 B1 KR101741702 B1 KR 101741702B1 KR 1020157015833 A KR1020157015833 A KR 1020157015833A KR 20157015833 A KR20157015833 A KR 20157015833A KR 101741702 B1 KR101741702 B1 KR 101741702B1
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KR
South Korea
Prior art keywords
dozer
floating
cylinder
flow path
check valve
Prior art date
Application number
KR1020157015833A
Other languages
English (en)
Korean (ko)
Other versions
KR20150092168A (ko
Inventor
정원철
지세립
Original Assignee
볼보 컨스트럭션 이큅먼트 에이비
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 볼보 컨스트럭션 이큅먼트 에이비 filed Critical 볼보 컨스트럭션 이큅먼트 에이비
Publication of KR20150092168A publication Critical patent/KR20150092168A/ko
Application granted granted Critical
Publication of KR101741702B1 publication Critical patent/KR101741702B1/ko

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Classifications

    • 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
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
    • 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
    • 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
    • E02F9/2285—Pilot-operated systems
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3127—Floating position connecting the working ports and the return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/77—Control of direction of movement of the output member
    • F15B2211/7741—Control of direction of movement of the output member with floating mode, e.g. using a direct connection between both lines of a double-acting cylinder

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
KR1020157015833A 2012-12-20 2012-12-20 플로팅 기능이 구비된 건설기계 KR101741702B1 (ko)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2012/011178 WO2014098284A1 (fr) 2012-12-20 2012-12-20 Engin de chantier à fonction flottante

Publications (2)

Publication Number Publication Date
KR20150092168A KR20150092168A (ko) 2015-08-12
KR101741702B1 true KR101741702B1 (ko) 2017-05-30

Family

ID=50978579

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020157015833A KR101741702B1 (ko) 2012-12-20 2012-12-20 플로팅 기능이 구비된 건설기계

Country Status (5)

Country Link
US (1) US20150315768A1 (fr)
EP (1) EP2937472A4 (fr)
KR (1) KR101741702B1 (fr)
AU (1) AU2012397386B2 (fr)
WO (1) WO2014098284A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112013006501T5 (de) * 2013-01-24 2016-03-31 Volvo Construction Equipment Ab Vorrichtung und Verfahren zum Steuern einer Flussrate bei Baumaschinen
KR101977113B1 (ko) * 2015-06-02 2019-08-28 두산인프라코어 주식회사 건설기계의 유압 시스템
US10641388B2 (en) 2015-12-07 2020-05-05 Kubota Corporation Hydraulic system of work machine and work machine
KR102491222B1 (ko) * 2015-12-11 2023-01-25 주식회사 대동 작업차용 작업기 승강 및 플로팅 구현을 위한 유압회로
CN110158682B (zh) * 2019-05-06 2021-07-02 广西柳工机械股份有限公司 平地机工作装置液压***
CN113323071B (zh) * 2021-05-14 2023-02-24 安徽铜冠机械股份有限公司 地下铲运机铲斗浮动控制单元

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040221714A1 (en) * 2003-02-21 2004-11-11 Marcus Bitter Hydraulic control circuit for a hydraulic lifting cylinder
JP2008121893A (ja) * 2006-11-14 2008-05-29 Husco Internatl Inc 油圧システムのためのエネルギー回収及び再利用技術

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166506A (en) * 1975-06-30 1979-09-04 Kabushiki Kaisha Komatsu Seisakusho Controlling apparatus for bulldozer blade
US4282798A (en) * 1979-10-22 1981-08-11 Ex-Cell-O Corporation Control valve unit for hydraulic linear actuator
US4359931A (en) * 1981-01-19 1982-11-23 The Warner & Swasey Company Regenerative and anticavitation hydraulic system for an excavator
JP3478931B2 (ja) * 1996-09-20 2003-12-15 新キャタピラー三菱株式会社 油圧回路
US6092454A (en) * 1998-07-23 2000-07-25 Caterpillar Inc. Controlled float circuit for an actuator
JP2002088796A (ja) * 2000-09-19 2002-03-27 Kobelco Contstruction Machinery Ltd ドーザ装置
US6892535B2 (en) * 2002-06-14 2005-05-17 Volvo Construction Equipment Holding Sweden Ab Hydraulic circuit for boom cylinder combination having float function
KR100849500B1 (ko) * 2006-11-29 2008-07-31 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 플로팅 기능이 구비된 더블 체크밸브
KR101500744B1 (ko) * 2008-11-19 2015-03-09 두산인프라코어 주식회사 건설기계의 붐 실린더 제어회로

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040221714A1 (en) * 2003-02-21 2004-11-11 Marcus Bitter Hydraulic control circuit for a hydraulic lifting cylinder
JP2008121893A (ja) * 2006-11-14 2008-05-29 Husco Internatl Inc 油圧システムのためのエネルギー回収及び再利用技術

Also Published As

Publication number Publication date
EP2937472A1 (fr) 2015-10-28
KR20150092168A (ko) 2015-08-12
US20150315768A1 (en) 2015-11-05
WO2014098284A1 (fr) 2014-06-26
AU2012397386A1 (en) 2015-07-09
AU2012397386B2 (en) 2016-05-19
EP2937472A4 (fr) 2016-09-07

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E701 Decision to grant or registration of patent right
GRNT Written decision to grant