EP1687542B1 - Dispositif de commande hydraulique d'un equipement mobile - Google Patents

Dispositif de commande hydraulique d'un equipement mobile Download PDF

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Publication number
EP1687542B1
EP1687542B1 EP04802785A EP04802785A EP1687542B1 EP 1687542 B1 EP1687542 B1 EP 1687542B1 EP 04802785 A EP04802785 A EP 04802785A EP 04802785 A EP04802785 A EP 04802785A EP 1687542 B1 EP1687542 B1 EP 1687542B1
Authority
EP
European Patent Office
Prior art keywords
valve
hydraulic
tank
control
attenuation
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.)
Not-in-force
Application number
EP04802785A
Other languages
German (de)
English (en)
Other versions
EP1687542A1 (fr
Inventor
Wolfgang Kauss
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.)
Bosch Rexroth AG
Original Assignee
Bosch Rexroth AG
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 Bosch Rexroth AG filed Critical Bosch Rexroth AG
Publication of EP1687542A1 publication Critical patent/EP1687542A1/fr
Application granted granted Critical
Publication of EP1687542B1 publication Critical patent/EP1687542B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E02F9/2217—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
    • E02F9/2203—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
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/021—Installations or systems with accumulators used for damping

Definitions

  • the invention relates to a hydraulic control arrangement for a mobile working device according to the preamble of claim 1.
  • the DE 44 16 228 A1 shows a hydraulic control arrangement in which the lifting cylinder of a loading shovel of a wheel loader via a directional control valve and a damping valve with pressure medium can be supplied.
  • the two pressure chambers of each lift cylinder to raise or lower the bucket are connected to a pump or a tank.
  • this directional control valve In a spring-biased center position of this directional control valve, the connections to the pressure chambers are shut off.
  • the damping valve can be in the neutral position of the directional valve, the pressure chambers of the lift cylinder either with a tank (floating position) or in the support direction of a load effective pressure chambers (cylinder chambers) with a hydraulic accumulator and the other pressure chambers (annuli) connect to a tank, so that vibrations the loading shovel can be steamed. These pitching vibrations occur especially when the loading bucket is full and the driving speed is higher.
  • the damping valve can be switched to the "pitching vibration damping" switch position by the driver or automatically as soon as pitching vibrations occur or as soon as the vehicle speed exceeds a predetermined limit.
  • the switching position "swimming" of the damping valve is controlled by the driver, for example, when the loading shovel is to be drawn over this for leveling the soil.
  • the invention has for its object to provide a hydraulic control arrangement for a mobile work unit, in which the functions "swimming" and “pitch vibration damping" are made possible with little effort.
  • the hydraulic control arrangement has a directional control valve, via which the pressure medium flow between the pressure chambers of the hydraulic cylinder and a pump or a tank can be controlled.
  • the directional control valve is associated with a damping valve arrangement, via which both pressure chambers of the hydraulic cylinder can be connected to a hydraulic accumulator in order to switch over to the function "pitching oscillation damping".
  • damping valve assembly must be designed with only one working port, since both in the function "pitching vibration damping” as well as in the function "swimming" both pressure chambers of the hydraulic cylinder with the same pressure, i. the pressure in the hydraulic accumulator or the tank pressure are applied.
  • the damping valve assembly can also be designed with a small nominal diameter, since it is only flowed through by a low pressure medium flow, which corresponds to the volume displaced by the piston rod.
  • the hydraulic control arrangement can be further simplified if the directional control valve in its neutral position connects the supply and discharge lines leading to the two pressure chambers of the hydraulic cylinder, so that the working connection of the damping valve arrangement only has to be connected to the supply or discharge line via a single damping line , so that the Verrohrungsaufwand compared to the conventional solution is further reduced.
  • the damping valve is designed as a 3/3-way valve, wherein the two input terminals are connected to the hydraulic accumulator or the tank and the working port with leading to the drain or flow line damping line. In the neutral position of the damping valve these connections are shut off against each other, while in the two switching positions either the hydraulic accumulator or the tank are connected to the damping line.
  • the 3/3-way valve and two 2/2-way valves can be used, with one of the function "swimming" and the other of the function "pitching vibration damping" is assigned.
  • the control of the damping valve arrangement is preferably carried out electrically, wherein the control signals can be issued by the driver, for example by actuation of switches of a pilot control device.
  • the actuation of the directional control valve is preferably carried out hydraulically via the aforementioned pilot control device.
  • the hydraulic accumulator can be designed as a piston accumulator.
  • the hydraulic control device 1 is applied, for example, to two lift cylinders a pressure bucket of a wheel loader or backhoe loader with pressure medium to supply.
  • a pressure bucket of a wheel loader or backhoe loader with pressure medium to supply.
  • the circuit diagram by way of example, only one lift cylinder 2 is shown, whose pressure chambers can be connected via a directional control valve 4 to a pump 6 or a tank T.
  • the control of the directional control valve 4 via a hydraulic pilot unit 8 by operating a joystick 10 by the driver of the mobile implement.
  • the pressure chambers of the lifting cylinders 2 can be connected via a damping valve 12 to a hydraulic accumulator 14 or the tank T.
  • the damping valve 12 is electrically actuated and can be actuated via switches which are arranged on the joystick 10.
  • the loader supporting the lifting cylinder 2 are designed as differential cylinders, wherein in the figure, the weight of the bucket and the load recorded therein are marked with M.
  • the piston bottom side cylinder chamber 16 of the lift cylinder 2 is connected via a feed line 20 with a working port A and an annular space 18 via a drain line 22 to a working port B of the directional control valve 4.
  • control of the directional control valve 4 is hydraulically via control lines 24, 26, via the control surfaces of the spool with a control pressure difference can be applied to move the spool in the desired position.
  • These control pressures are generated by the hydraulic pilot control device 8, via which a system control pressure can be reduced to the desired control pressure by means of pressure reducing valves which can be actuated as a function of the position of the joystick 10 and can be tapped off at the control connections 1, 2 of the pilot control device 8.
  • pressure reducing valves which can be actuated as a function of the position of the joystick 10 and can be tapped off at the control connections 1, 2 of the pilot control device 8.
  • the spool of the directional control valve 4 is biased by springs 28, 30 in a middle position in which the two working ports A, B connected to each other and the two input terminals P and S are shut off. That in this middle position, the two pressure chambers 16, 18 of the lift cylinder 2 are interconnected.
  • the damping valve 12 is designed in the illustrated embodiment as a 3/3-way valve, wherein an output or working port A is connected via a damping line 32 to the drain line 22.
  • a tank connection T of the damping valve 12 is connected to the tank T and a pressure connection P to a hydraulic accumulator 14.
  • the valve spool of the damping valve 12 is about centering springs 33, 34 in biased a neutral position in which the three terminals A, T, P are shut off against each other.
  • the damping valve 12 is electrically actuated, wherein the actuation of the valve slide via electromagnets 36, 38, which are connected via signal lines 40, 42 with switches on the joystick 10.
  • the damping valve 12 is designed as a switching valve, wherein in its marked with (a) switching position of the working port A is connected to the tank port T, so that both the annular space 18 and the pressure chamber 16 are connected to the tank T with unconfirmed directional control valve 4 - with (a) marked switching position thus stands for the function "swimming" in which the loading bucket practically rests only by its own weight and the loaded load on the ground and follows during leveling unevenness of the soil.
  • damping valve 12 In this position, pressure medium between the cylinder chamber 16 and the annular space 18 can be pushed back and forth, wherein on the damping valve 12 only that amount of pressure medium flows, which corresponds to the changing piston rod volume. Because of this comparatively low pressure medium volume flow, the damping valve 12 can be performed with a smaller nominal diameter than in conventional solutions.
  • the damping valve 12 can be - as stated above - switch by pressing a switch in its "pitch vibration damping" function, in principle it is also possible to automatically switch to this function when a certain driving speed is reached or the vibration amplitude exceeds a predetermined maximum value.
  • the damping valve 12 is switched back to its neutral position by the electromagnets 36, 38 are de-energized and the directional control valve 4 is set by means of the Vors Kunststoff réelles 8 in one of its positions "LIFT” or "LOW” to the lift cylinder 2 extend or retract.
  • the damping valve 12 can also be performed by two 2/2-way valves, one of the function "swimming" and the other of the function "pitching vibration damping" is assigned.
  • the hydraulic accumulator 14 is preferably designed as a piston accumulator, since this is particularly well suited for high pressures.
  • damping line 32 can also be connected to the flow line 20.
  • connection of the two pressure chambers 16, 18 can also be integrated into the damping valve 12.
  • a hydraulic control assembly for a mobile implement, such as a backhoe loader or a wheel loader, wherein a Working tool of the implement by means of a hydraulic cylinder is actuated, the pressure chambers for damping of pitch oscillations of the working tool together with a hydraulic accumulator 14 are connected.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lifting Devices For Agricultural Implements (AREA)

Claims (7)

  1. Dispositif de commande hydraulique pour une machine de travail mobile, comportant un distributeur (4), par l'intermédiaire duquel des chambres de pression (16, 18) d'un vérin hydraulique (2) peuvent être reliées à une cuve (T) ou une pompe hydraulique (6) par l'intermédiaire d'une conduite d'évacuation et d'une conduite d'admission (22, 20), et comportant un dispositif à vanne d'amortissement (12) par l'intermédiaire duquel, en vue d'amortir des vibrations et en vue de régler une position flottante, les chambres de pression (16, 18) peuvent être reliées à la cuve (T) ou à un réservoir hydraulique (14), caractérisé en ce que, dans la position d'amortissement, les chambres de pression (16, 18) du vérin hydraulique (2) sont reliées toutes les deux au réservoir hydraulique (14).
  2. Dispositif de commande selon la revendication 1, dans lequel la conduite d'admission et la conduite d'évacuation (20, 22) sont reliées l'une à l'autre dans une position médiane du distributeur (4), et un raccord de travail (A) du dispositif à vanne d'amortissement (12) est relié via une conduite d'amortissement (32) à la conduite d'admission et à la conduite d'évacuation (20, 22).
  3. Dispositif de commande selon la revendication 2, dans lequel le dispositif à vanne d'amortissement (12) est une vanne à 3/3 voies, comportant une position neutre, dans laquelle le raccord de travail (A) est fermé vers le réservoir hydraulique (14) et vers la cuve (T), et comportant deux positions de commutation (a, b), dans lesquelles le raccord de travail (A) est relié à la cuve (T) ou au réservoir hydraulique (14).
  4. Dispositif de commande selon la revendication 1 ou 2, dans lequel le dispositif à vanne d'amortissement (12) est une vanne à 2/2 voies qui, dans une position d'ouverture, est apte à commander une liaison vers la cuve (T) ou le réservoir hydraulique (14).
  5. Dispositif de commande selon la revendication 3 ou 4, dans lequel le dispositif à vanne d'amortissement (12) peut être actionné électriquement par l'intermédiaire d'un dispositif pilote (8).
  6. Dispositif de commande selon l'une quelconque des revendications précédentes, dans lequel le distributeur (4) peut être actionné par voie hydraulique par l'intermédiaire d'un dispositif pilote (8).
  7. Dispositif de commande selon l'une quelconque des revendications précédentes, dans lequel le réservoir hydraulique (14) est un réservoir à piston.
EP04802785A 2003-11-25 2004-11-22 Dispositif de commande hydraulique d'un equipement mobile Not-in-force EP1687542B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10354959A DE10354959A1 (de) 2003-11-25 2003-11-25 Hydraulische Steueranordnung für ein mobiles Arbeitsgerät
PCT/DE2004/002574 WO2005052380A1 (fr) 2003-11-25 2004-11-22 Dispositif de commande hydraulique d'un equipement mobile

Publications (2)

Publication Number Publication Date
EP1687542A1 EP1687542A1 (fr) 2006-08-09
EP1687542B1 true EP1687542B1 (fr) 2007-10-31

Family

ID=34625229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04802785A Not-in-force EP1687542B1 (fr) 2003-11-25 2004-11-22 Dispositif de commande hydraulique d'un equipement mobile

Country Status (5)

Country Link
US (1) US7383682B2 (fr)
EP (1) EP1687542B1 (fr)
AT (1) ATE377154T1 (fr)
DE (2) DE10354959A1 (fr)
WO (1) WO2005052380A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090057045A1 (en) * 2007-08-29 2009-03-05 Cnh America Llc Hydraulic system to deter lift arm chatter
DE102009016571A1 (de) * 2009-04-06 2010-10-07 Agco Gmbh Hydraulische Steueranordnung
CN103534422B (zh) 2011-03-15 2016-01-20 派克汉尼芬公司 缓冲回转回路
US8858151B2 (en) * 2011-08-16 2014-10-14 Caterpillar Inc. Machine having hydraulically actuated implement system with down force control, and method
US8662277B2 (en) 2011-12-22 2014-03-04 Fairfield Manufacturing Company, Inc. Planetary gearbox with integral service brake
EP2800909A2 (fr) * 2012-01-05 2014-11-12 Parker Hannifin Corp. Système électro-hydraulique avec fonction de flottement
US9429227B2 (en) 2014-02-19 2016-08-30 Fairfield Manufacturing Company, Inc. Planetary gearbox with integral service brake
US10174770B2 (en) 2015-11-09 2019-01-08 Caterpillar Inc. System and method of hydraulic energy recovery for machine start-stop and machine ride control
US10151080B2 (en) 2015-11-30 2018-12-11 The Charles Machine Works, Inc. Valve assembly for work attachment

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1270241A1 (ru) 1985-07-10 1986-11-15 Минское научно-производственное объединение дорожного машиностроения "Дормаш" Гидропривод скрепера
JPH0662269B2 (ja) * 1989-04-21 1994-08-17 株式会社神戸製鋼所 移動式クレーンの変位抑制装置
JPH0815998B2 (ja) * 1989-10-14 1996-02-21 株式会社神戸製鋼所 ホイール式クレーンの振動抑制装置
DE4129509C2 (de) * 1991-09-05 1994-06-16 Rexroth Mannesmann Gmbh Hydraulische Steueranordnung für Baumaschinen
DE4416228A1 (de) * 1994-05-07 1995-11-09 Rexroth Mannesmann Gmbh Hydraulische Anlage für ein mobiles Arbeitsgerät, insbesondere für einen Radlader
AU1043697A (en) * 1996-10-21 1998-05-15 Ab Alo-Maskiner Vibration dampening apparatus for mobile machines
DE19754828C2 (de) * 1997-12-10 1999-10-07 Mannesmann Rexroth Ag Hydraulische Steueranordnung für eine mobile Arbeitsmaschine, insbesondere für einen Radlader, zur Dämpfung von Nickschwingungen
US20040088972A1 (en) * 2000-05-11 2004-05-13 Edwin Harnischfeger Hydraulic control arrangement
GB2418903B (en) * 2004-10-08 2008-06-25 Caterpillar Inc Ride control circuit for a work machine

Also Published As

Publication number Publication date
DE10354959A1 (de) 2005-06-30
US7383682B2 (en) 2008-06-10
ATE377154T1 (de) 2007-11-15
DE502004005397D1 (de) 2007-12-13
US20070051100A1 (en) 2007-03-08
EP1687542A1 (fr) 2006-08-09
WO2005052380A1 (fr) 2005-06-09

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