EP1550774A3 - Ram cylinder control system for wheel type excavator - Google Patents

Ram cylinder control system for wheel type excavator Download PDF

Info

Publication number
EP1550774A3
EP1550774A3 EP04030864A EP04030864A EP1550774A3 EP 1550774 A3 EP1550774 A3 EP 1550774A3 EP 04030864 A EP04030864 A EP 04030864A EP 04030864 A EP04030864 A EP 04030864A EP 1550774 A3 EP1550774 A3 EP 1550774A3
Authority
EP
European Patent Office
Prior art keywords
signal
cylinder control
ram cylinder
ram
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.)
Granted
Application number
EP04030864A
Other languages
German (de)
French (fr)
Other versions
EP1550774B1 (en
EP1550774A2 (en
Inventor
Dong Jae Lee
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.)
HD Hyundai Infracore Co Ltd
Original Assignee
Daewoo Heavy Industries and 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 Daewoo Heavy Industries and Machinery Ltd filed Critical Daewoo Heavy Industries and Machinery Ltd
Publication of EP1550774A2 publication Critical patent/EP1550774A2/en
Publication of EP1550774A3 publication Critical patent/EP1550774A3/en
Application granted granted Critical
Publication of EP1550774B1 publication Critical patent/EP1550774B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • E02F9/2207—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing or compensating oscillations
    • 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
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • 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)
  • Operation Control Of Excavators (AREA)

Abstract

A ram cylinder control system for a wheel type hydraulic comprises a pilot hydraulic pump 20, pilot-opened check valves 24b for normally prohibiting discharge of working fluid from the ram cylinders 24 to lock the ram cylinders 24, a ram cylinder control valve 29 adapted to shift from a home position to an operating position 29a in response to a valve control signal for allowing the hydraulic oil from the pilot hydraulic pump 20 to open the check valves so that the hydraulic oil can be discharged from the ram cylinders 24, brake pressure sensor for detecting hydraulic oil pressure supplied to the brakes, joystick position detector for detecting position of the joystick to generate one of a forward position signal, a backward position signal and a neutral signal, and a controller 19 for applying the valve control signal to the ram cylinder control valve 29 if the forward position signal or the backward position signal is received and if the brake pressure is no greater than a set pressure, and for cutting off the valve control signal applied to the ram cylinder control valve 26 if the neutral signal is received and if the brake pressure exceeds the set pressure.
EP04030864A 2003-12-29 2004-12-28 Ram cylinder control system for wheel type excavator Expired - Fee Related EP1550774B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2003098611 2003-12-29
KR1020030098611A KR100988420B1 (en) 2003-12-29 2003-12-29 Ram cylinder control device for wheel type excavator

Publications (3)

Publication Number Publication Date
EP1550774A2 EP1550774A2 (en) 2005-07-06
EP1550774A3 true EP1550774A3 (en) 2005-08-10
EP1550774B1 EP1550774B1 (en) 2008-03-26

Family

ID=34567846

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04030864A Expired - Fee Related EP1550774B1 (en) 2003-12-29 2004-12-28 Ram cylinder control system for wheel type excavator

Country Status (5)

Country Link
EP (1) EP1550774B1 (en)
JP (1) JP2005194870A (en)
KR (1) KR100988420B1 (en)
CN (1) CN100591871C (en)
DE (1) DE602004012700T2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100753988B1 (en) * 2006-06-09 2007-08-31 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 Axle locking cylinder structure for heavy construction equipment
JP4944537B2 (en) * 2006-08-09 2012-06-06 日立建機株式会社 Travel controller for hydraulically driven vehicle
DE102007018405B4 (en) * 2007-04-17 2022-09-15 Alpha Fluid Hydrauliksysteme Müller GmbH Electrohydraulic control
CN102338134B (en) * 2011-10-24 2013-08-21 中联重科股份有限公司 Concrete pumping equipment and reversing control method for pumping oil cylinder of same
KR102042285B1 (en) * 2013-12-26 2019-11-27 두산인프라코어 주식회사 Controlling ram cylnder of wheel type construction equipment and method thereof
US9663335B2 (en) * 2014-08-27 2017-05-30 Caterpillar Inc. Hydraulic winch control system and method
CN105351272B (en) * 2015-12-11 2017-05-24 重庆纳川山隅重工设备有限公司 Self-adaptive valve group for hydraulic rock drill
KR102533655B1 (en) * 2016-09-05 2023-05-17 에이치디현대인프라코어 주식회사 Construction machinery

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4835970A (en) * 1985-08-13 1989-06-06 Nissan Motor Co. Ltd. Pneumatic power brake system
US5919243A (en) * 1995-12-29 1999-07-06 Volvo Construction Equipment Korea Co., Ltd. Work brake apparatus for wheel type excavator
US20030011240A1 (en) * 2001-07-11 2003-01-16 Deere & Company, A Delaware Corporation Secondary brake system with electrohydraulic proportional valve

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55114610A (en) * 1979-02-21 1980-09-04 Kubota Ltd Working car
NL8200556A (en) * 1982-02-13 1983-09-01 Rotterdamsche Droogdok Mij VEHICLE.
JPS6361621A (en) 1986-09-02 1988-03-17 Hitachi Constr Mach Co Ltd Ram lock control device for work-vehicle
JP2937329B2 (en) * 1987-10-26 1999-08-23 日立建機株式会社 Work vehicle ram lock control device
JPH0662269B2 (en) * 1989-04-21 1994-08-17 株式会社神戸製鋼所 Displacement restraint device for mobile crane
KR200315168Y1 (en) 2003-02-19 2003-06-02 정권철 An apparatus for controling a shaft of excavator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4835970A (en) * 1985-08-13 1989-06-06 Nissan Motor Co. Ltd. Pneumatic power brake system
US5919243A (en) * 1995-12-29 1999-07-06 Volvo Construction Equipment Korea Co., Ltd. Work brake apparatus for wheel type excavator
US20030011240A1 (en) * 2001-07-11 2003-01-16 Deere & Company, A Delaware Corporation Secondary brake system with electrohydraulic proportional valve

Also Published As

Publication number Publication date
KR100988420B1 (en) 2010-10-18
CN100591871C (en) 2010-02-24
EP1550774B1 (en) 2008-03-26
JP2005194870A (en) 2005-07-21
KR20050067620A (en) 2005-07-05
DE602004012700T2 (en) 2009-04-16
DE602004012700D1 (en) 2008-05-08
CN1637211A (en) 2005-07-13
EP1550774A2 (en) 2005-07-06

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