AU2012397386B2 - Construction machine with floating function - Google Patents

Construction machine with floating function Download PDF

Info

Publication number
AU2012397386B2
AU2012397386B2 AU2012397386A AU2012397386A AU2012397386B2 AU 2012397386 B2 AU2012397386 B2 AU 2012397386B2 AU 2012397386 A AU2012397386 A AU 2012397386A AU 2012397386 A AU2012397386 A AU 2012397386A AU 2012397386 B2 AU2012397386 B2 AU 2012397386B2
Authority
AU
Australia
Prior art keywords
dozer
floating
flow path
cylinder
check valve
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.)
Ceased
Application number
AU2012397386A
Other languages
English (en)
Other versions
AU2012397386A1 (en
Inventor
Won-Cheol Jeong
Se-Rib Jee
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.)
Volvo Construction Equipment AB
Original Assignee
Volvo Construction Equipment AB
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 Volvo Construction Equipment AB filed Critical Volvo Construction Equipment AB
Publication of AU2012397386A1 publication Critical patent/AU2012397386A1/en
Application granted granted Critical
Publication of AU2012397386B2 publication Critical patent/AU2012397386B2/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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)
AU2012397386A 2012-12-20 2012-12-20 Construction machine with floating function Ceased AU2012397386B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2012/011178 WO2014098284A1 (ko) 2012-12-20 2012-12-20 플로팅 기능이 구비된 건설기계

Publications (2)

Publication Number Publication Date
AU2012397386A1 AU2012397386A1 (en) 2015-07-09
AU2012397386B2 true AU2012397386B2 (en) 2016-05-19

Family

ID=50978579

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2012397386A Ceased AU2012397386B2 (en) 2012-12-20 2012-12-20 Construction machine with floating function

Country Status (5)

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

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
US10407876B2 (en) 2015-06-02 2019-09-10 Doosan Infracore Co., Ltd. Hydraulic system of construction machinery
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系统
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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030230082A1 (en) * 2002-06-14 2003-12-18 Volvo Construction Equipment Holding Sweden Ab Hydraulic circuit for boom cylinder combination having float function
US20080121101A1 (en) * 2006-11-29 2008-05-29 Volvo Construction Equipment Holding Sweden Ab Double check valve having floating function
US20110220231A1 (en) * 2008-11-19 2011-09-15 Doosan Infracore Co., Ltd. Boom cylinder control circuit for construction machine

Family Cites Families (8)

* 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
DE10307346A1 (de) * 2003-02-21 2004-09-02 Deere & Company, Moline Ventilanordnung
CN101220823A (zh) * 2006-11-14 2008-07-16 胡斯可国际股份有限公司 用于液压系统的能量回收与再利用技术

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030230082A1 (en) * 2002-06-14 2003-12-18 Volvo Construction Equipment Holding Sweden Ab Hydraulic circuit for boom cylinder combination having float function
US20080121101A1 (en) * 2006-11-29 2008-05-29 Volvo Construction Equipment Holding Sweden Ab Double check valve having floating function
US20110220231A1 (en) * 2008-11-19 2011-09-15 Doosan Infracore Co., Ltd. Boom cylinder control circuit for construction machine

Also Published As

Publication number Publication date
EP2937472A1 (en) 2015-10-28
EP2937472A4 (en) 2016-09-07
AU2012397386A1 (en) 2015-07-09
KR20150092168A (ko) 2015-08-12
KR101741702B1 (ko) 2017-05-30
WO2014098284A1 (ko) 2014-06-26
US20150315768A1 (en) 2015-11-05

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Legal Events

Date Code Title Description
DA3 Amendments made section 104

Free format text: THE NATURE OF THE AMENDMENT IS: AMEND THE NAME OF THE INVENTOR TO READ JEONG, WONCHEOL AND JEE, SE-RIB

FGA Letters patent sealed or granted (standard patent)
MK14 Patent ceased section 143(a) (annual fees not paid) or expired