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IN2014CN04500A - - Google Patents

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Publication number
IN2014CN04500A
IN2014CN04500A IN4500CHN2014A IN2014CN04500A IN 2014CN04500 A IN2014CN04500 A IN 2014CN04500A IN 4500CHN2014 A IN4500CHN2014 A IN 4500CHN2014A IN 2014CN04500 A IN2014CN04500 A IN 2014CN04500A
Authority
IN
India
Prior art keywords
flow
steering
hydraulic
control valve
cylinders
Prior art date
Application number
Inventor
Makoto Ito
Ryo Yamamoto
Kazuto Fujiyama
Hiroyasu Kodera
Shinichiro Tanaka
Original Assignee
Kawasaki Heavy Ind Ltd
Kcm Kk
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 Kawasaki Heavy Ind Ltd, Kcm Kk filed Critical Kawasaki Heavy Ind Ltd
Publication of IN2014CN04500A publication Critical patent/IN2014CN04500A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
    • B62D5/075—Supply of pressurised fluid for steering also supplying other consumers ; control thereof using priority valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/065—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0841—Articulated frame, i.e. having at least one pivot point between two travelling gear units
    • 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
    • E02F9/225—Control of steering, e.g. for hydraulic motors driving the vehicle tracks
    • 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
    • E02F9/2282—Systems using center bypass type changeover valves
    • 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
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/167—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load using pilot pressure to sense the demand
    • 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
    • F15B2211/35—Directional control combined with flow control
    • F15B2211/351—Flow control by regulating means in feed line, i.e. meter-in control
    • 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
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Power Steering Mechanism (AREA)

Abstract

A hydraulic control device (10) is provided with: a hydraulic pump (30) to which steering cylinders (18L 18R) and boom cylinders (22) are connected in parallel; a steering control valve (34) which controls the direction of hydraulic oil flowing to the steering cylinders (18L 18R); and a boom control valve (44) which when set to a neutral position connects the hydraulic pump (30) to a tank (48) and which when set to an offset position controls the direction of hydraulic oil flowing to the boom cylinders (22). The hydraulic control device (10) is also provided with: a meter in compensator (33) which according to pressures across the variable throttle (37) of the steering control valve (34) increases the rate of flow which is caused to flow to the steering control valve (34); and a bleed off compensator (42) which in response to an increase in the pressure of hydraulic oil caused to flow to the steering cylinders (18L 18R) reduces the rate of flow caused to flow to the boom control valve (44) and maintains hydraulic pressure in the steering control circuit (31) at a predetermined pressure.
IN4500CHN2014 2011-12-08 2012-11-30 IN2014CN04500A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011269293A JP6001846B2 (en) 2011-12-08 2011-12-08 Hydraulic control device and construction machine including the same
PCT/JP2012/007710 WO2013084456A1 (en) 2011-12-08 2012-11-30 Hydraulic control device and construction machine with same

Publications (1)

Publication Number Publication Date
IN2014CN04500A true IN2014CN04500A (en) 2015-09-11

Family

ID=48573847

Family Applications (1)

Application Number Title Priority Date Filing Date
IN4500CHN2014 IN2014CN04500A (en) 2011-12-08 2012-11-30

Country Status (5)

Country Link
US (1) US9821840B2 (en)
JP (1) JP6001846B2 (en)
CN (1) CN103917431B (en)
IN (1) IN2014CN04500A (en)
WO (1) WO2013084456A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5809549B2 (en) * 2011-12-08 2015-11-11 株式会社Kcm Hydraulic drive
JP6134263B2 (en) 2013-12-27 2017-05-24 株式会社Kcm Hydraulic drive system
JP6621130B2 (en) * 2015-02-06 2019-12-18 キャタピラー エス エー アール エル Hydraulic actuator control circuit
CN105201944B (en) * 2015-09-25 2017-10-03 广西柳工机械股份有限公司 Flux amplification valve and steering hydraulic system
JP6730798B2 (en) * 2015-11-17 2020-07-29 ナブテスコ株式会社 Hydraulic drive
ITUB20159570A1 (en) * 2015-12-16 2017-06-16 Walvoil Spa HYDRAULIC VALVE DEVICE WITH MORE WORKING SECTIONS WITH PUMP CONTROL SYSTEM
CN106948404A (en) * 2017-04-12 2017-07-14 管中林 One kind has multi-functional walking excavating machine
JP6858723B2 (en) 2018-03-28 2021-04-14 日立建機株式会社 Wheel loader
CN108953261B (en) * 2018-09-11 2023-07-11 圣邦集团有限公司 Hydraulic control system and control method for crawler-type harvester
JP7106466B2 (en) * 2019-02-05 2022-07-26 株式会社クボタ work vehicle

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5970245A (en) * 1982-10-13 1984-04-20 Daikin Ind Ltd Oil pressure circuit for car
US4463557A (en) * 1983-08-12 1984-08-07 Deere & Company Open center hydraulic system
JP2688493B2 (en) * 1988-07-04 1997-12-10 東芝機械株式会社 Hydraulic circuit
JPH02107802A (en) * 1988-08-31 1990-04-19 Hitachi Constr Mach Co Ltd Hydraulic driving device
JPH02193769A (en) * 1989-01-21 1990-07-31 Yutani Heavy Ind Ltd Steering operating sensitivity change-over device
JPH05164106A (en) * 1991-12-06 1993-06-29 Iseki & Co Ltd Hydraulic circuit for steering combine harvester or the like
DE4304376C2 (en) * 1993-02-13 1997-08-07 Hydraulik Nord Gmbh Load measuring steering system
US6769348B2 (en) * 2001-07-03 2004-08-03 Caterpillar Inc Hydraulic system with flow priority function
JP4279734B2 (en) * 2004-06-22 2009-06-17 カヤバ工業株式会社 Industrial machinery control circuits
JP4446822B2 (en) * 2004-07-13 2010-04-07 日立建機株式会社 Hydraulic drive device for work vehicle
JP2006290236A (en) * 2005-04-13 2006-10-26 Hitachi Constr Mach Co Ltd Hydraulic drive device
WO2008075568A1 (en) * 2006-12-21 2008-06-26 Hitachi Construction Machinery Co., Ltd. Steering system for working vehicle
JP4941928B2 (en) * 2006-12-26 2012-05-30 日立建機株式会社 Steering system for work vehicle
WO2008081843A1 (en) * 2006-12-26 2008-07-10 Hitachi Construction Machinery Co., Ltd. Steering system for working vehicle

Also Published As

Publication number Publication date
US9821840B2 (en) 2017-11-21
CN103917431A (en) 2014-07-09
CN103917431B (en) 2016-03-30
WO2013084456A1 (en) 2013-06-13
US20140318116A1 (en) 2014-10-30
JP2013119358A (en) 2013-06-17
JP6001846B2 (en) 2016-10-05

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