EP0759109B1 - Systeme hydraulique pour engin de chantier mobile, notamment un chargeur a roues - Google Patents

Systeme hydraulique pour engin de chantier mobile, notamment un chargeur a roues Download PDF

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Publication number
EP0759109B1
EP0759109B1 EP95917954A EP95917954A EP0759109B1 EP 0759109 B1 EP0759109 B1 EP 0759109B1 EP 95917954 A EP95917954 A EP 95917954A EP 95917954 A EP95917954 A EP 95917954A EP 0759109 B1 EP0759109 B1 EP 0759109B1
Authority
EP
European Patent Office
Prior art keywords
valve
directional control
hydraulic
control valve
channel
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.)
Expired - Lifetime
Application number
EP95917954A
Other languages
German (de)
English (en)
Other versions
EP0759109A1 (fr
Inventor
Edwin Harnischfeger
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
Mannesmann 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 Mannesmann Rexroth AG filed Critical Mannesmann Rexroth AG
Publication of EP0759109A1 publication Critical patent/EP0759109A1/fr
Application granted granted Critical
Publication of EP0759109B1 publication Critical patent/EP0759109B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • 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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2271—Actuators and supports therefor and protection therefor

Definitions

  • the invention is based on a hydraulic system for a mobile tool, especially used for a wheel loader is and the features from the preamble of the claim 1 has.
  • DE 39 09 205 C1 shows several directional control valves, one of which is used to move to the Lifting and lowering the loading shovel using hydraulic fluid to supply.
  • this directional valve has also a switch position in which the two pressure chambers each lift cylinder are connected to the tank.
  • this Switch position of the directional valve lies with the loading shovel Weight on the ground and can be leveled over this be pulled or pushed. It floats on the as it were Bottom, which is why the switch position of the directional valve in question is also referred to as the switch position "swimming".
  • the "swimming" function can be found in DE 41 29 509 A1 can also be realized with an additional directional valve, the two pressure chambers each in a switch position Lift cylinder connects with each other and with the tank.
  • the invention has for its object a hydraulic Control arrangement with the features from the preamble of the claim 1 evolve so that a compact and space-saving Construction is possible that the piping effort is reduced and that the production can be inexpensive.
  • a hydraulic system solved the features from the preamble of the claim 1 and in which according to the characterizing part of this claim the shut-off valve in the directional control valve via which the two pressure chambers of the hydraulic cylinder can be pressurized separately and / or can be connected together with the tank, is integrated that the hydraulic accumulator and the first pressure chamber of the hydraulic cylinder with each other via the control spool of the directional valve are connectable.
  • the system is not also one additional shut-off valve available. Rather, one of the Directional control valves also function the shut-off valve. With that the Piping costs less, the design is compact and saves space, and costs are reduced.
  • a first directional valve via the the two pressure chambers of the hydraulic cylinder alternately with one Hydraulic pump and can be connected to the tank, and a second directional valve available, through which the two pressure rooms together with are connectable to the tank, so by the function "Swimming" is feasible.
  • the shut-off valve is now advantageous integrated in the second directional valve, because then none fourth switching position for the first directional valve is necessary.
  • the directional valve 10 serves in addition to two lift cylinders connected in parallel to each other press and lift the loading shovel of a wheel loader and lower.
  • Each lift cylinder 13 contains in a cylinder housing 14 a piston 15 having a piston rod 16, which the inside of the housing 14 in a piston rod side, annular pressure chamber 17 and in a piston rod-side Divides pressure chamber 18.
  • the pressure chambers 17 on the piston rod side the lift cylinders 13 are connected to a consumer line 19 first port 20 of the directional valve 10 connected.
  • the Pressure chambers 18 are connected via a line 21 to a connection 21 of the directional valve 10 connected.
  • This directional valve 10 has a valve housing 25 through which in Direction of alignment with the directional control valve 11 a pressure channel 26, which is connected to the pressure connection of a hydraulic pump 27 and pass through a tank channel 28 into a tank 29 opens.
  • the opening cross sections of these two channels are by the position of the control slide 30 of the directional valve 10 unaffected.
  • Another through the valve housing 25 Channel 31 is called the circulation channel, which in a middle position of the control slide 30 is open and at a shift of the spool 30 from the spring-centered Center position in one or the other direction until it is completely closed off.
  • the circulation channel 31 also leads through the others on the directional valve section 11 remote side of section 10 arranged
  • Directional valve sections of the valve block 12 is through the Control spool of the other directional valve sections as well can be influenced by the control slide 30 and ultimately with connected to the pressure channel 26.
  • the spool is moved 30 from the middle position become the connection 21 with the pressure channel 26 and the connection 20 with the tank channel 28 connected.
  • the pressure spaces 18 are pressurized and relieves the pressure chambers 17 to the tank.
  • the piston rods 16 extend, the loading shovel of the wheel loader is raised.
  • the pressure spaces 17 are pressurized and relieves the pressure chambers 18 to the tank.
  • the loading shovel Lowers itself.
  • the housing 35 of the directional control valve 11 is largely the same as the housing 25 of the directional valve 10. It has a channel 36 in extension of the pressure channel 26 of the valve 10, a tank channel 38 in the extension of the tank channel 28 and a continuous circulation channel 41, which continues the circulation channel 31 of the directional valve 10.
  • the circulation channel 41 is, as can be seen from the circuit symbol, in each position of the control spool 40 of the directional valve 11 connected to the tank channel 38, so that it is also possible a permanent connection between the circulation channel 31 and the To produce tank channel 28 in the housing 25 of the directional control valve 10 and to dispense with a circulation channel in the housing 35 of the directional control valve 11.
  • the tank channels 28 and 38 are namely open to one another.
  • the channel 36 of the valve housing 35 to the pressure channel 26 the valve housing 25 shut off.
  • This barrier can already be provided in the mold for the valve housing 35, however, only be carried out afterwards.
  • the channel 36 is open. It is connected to a hydraulic accumulator 42.
  • the directional control valve 11 also has two consumer connections 20 and 21, with the consumer connection 20th as the corresponding connection of the directional valve 10 with the pressure chambers 17 and the consumer connection 21 as the corresponding Connection of the directional valve 10 with the pressure chambers 18 of the lift cylinders 13 is connected.
  • the control spool 40 In the spring-centered position of the control spool 40 are the two consumer connections 20 and 21 and channels 36 and 38 against each other cordoned off.
  • the consumer connections are in one side position 20 and 21 with the channel 38 and thus with the tank 29 connected while the channel 36 is blocked. Consequently the lift cylinder 13 prevails in both pressure chambers 17 and 18 Tank pressure.
  • the loading shovel of a wheel loader can be used for leveling of the soil can be pulled over it.
  • the control spool 40 is shifted into this position arbitrarily by the driver or automatically when the wheel loader has reached a certain driving speed. It then becomes an electromagnetically operable pilot valve 50 actuated and a control pressure chamber 51 of the directional valve 11, which in the rest position of the valve 50 is relieved to the tank with a Line 52 connected by the maximum control pressure that for the actuation of the directional control valves of block 12 are available stands, is acted upon.
  • the memory 42 is up to one via a filling valve arrangement 60 adjustable maximum pressure can be charged via the filling valve arrangement 60 with the pressure chambers 18 of the lift cylinders 13 connected.
  • a filling valve arrangement 60 adjustable maximum pressure can be charged via the filling valve arrangement 60 with the pressure chambers 18 of the lift cylinders 13 connected.
  • the connection could also be outside of the valve housing 35 or within the housing 25.
  • the valve assembly 60 includes a pressure reducing valve 61 and a connected between the pressure reducing valve and the hydraulic accumulator 42, check valve 62 opening towards the hydraulic accumulator.
  • the pressure spaces 18 the lift cylinder 13 are pressurized, so the Hydraulic accumulator 42 via the valves 61 and 62 up to that in the Pressure spaces 18 prevailing pressure, provided this pressure does not exceed a value set on the pressure reducing valve.
  • the pressure in the pressure chambers 18 usually remains below of the set value, so that in the hydraulic accumulator 42 occurred maximum pressure, which is due to the check valve 62 is held in the hydraulic accumulator.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Claims (5)

  1. Une installation hydraulique pour un appareil de travail mobile, en particulier pour une pelleteuse, dotée d'un outil de travail pouvant être actionné par au moins un vérin (13) hydraulique, en particulier d'une pelle de chargement, dotée d'un piston (15) séparant l'intérieur du vérin (13) hydraulique en deux chambres (17, 18) de pression, dotée d'une valve d'isolement, grâce à laquelle une première des deux chambres (17, 18) de pression peut être connectée à un accumulateur (42) hydraulique, lequel peut être rechargé au travers d'une tuyauterie de remplissage, et dotée d'un distributeur (11) muni d'un tiroir (40) de commande afin de permettre la mise sous pression séparée et/ou la connexion à un réservoir (29) des deux chambres (17, 18) de pression du vérin (13) hydraulique, caractérisée en ce que la valve d'isolement est intégrée dans le distributeur (11) de telle manière, que l'accumulateur (42) hydraulique et la première chambre (18) de pression du vérin (13) hydraulique peuvent être connectés l'un à l'autre au travers du tiroir (40) de commande du distributeur (11).
  2. Une installation hydraulique conforme à la revendication n° 1, caractérisée en ce que la seconde chambre (17) de pression est connectée au réservoir (29) pendant la durée d'une connexion de la première chambre (18) de pression à l'accumulateur (42) hydraulique.
  3. Une installation hydraulique conforme à la revendication n° 1 ou n° 2, caractérisée en ce que les deux chambres (17, 18) de pression du vérin (13) hydraulique peuvent être connectées alternativement à une pompe (27) hydraulique et au réservoir (29) au travers d'un premier distributeur (10), que les deux chambres (17, 18) de pression peuvent être connectées conjointement au réservoir au travers d'un deuxième distributeur (11) et que la valve d'isolement est intégrée dans le deuxième distributeur (11).
  4. Une installation hydraulique conforme aux revendications n° 2 et n° 3, caractérisée en ce que non seulement la connexion de la première chambre (18) de pression du vérin (13) hydraulique à l'accumulateur (42) hydraulique, mais aussi la connexion de la seconde chambre (17) de pression au réservoir (29), peuvent être obtenues en actionnant le deuxième distributeur (11).
  5. Une installation hydraulique conforme à la revendication n° 3 ou n° 4, caractérisée en ce que le deuxième distributeur (11) et un distributeur (10) supplémentaire constituent des sections voisines d'un bloc (12) de distributeur, que le deuxième distributeur (11) et le distributeur (10) supplémentaire comportent des corps (25, 35) de valve, lesquels de par l'essentiel sont conçus de façon similaire et, dans le sens d'un alignement l'un sur l'autre, présentent un canal (26, 36) qui aboutit dans le canal (36, 26) de l'autre corps (35, 25) de valve, canal à partir duquel existe une connexion avec l'alésage du distributeur contenant le tiroir (30, 40) de distributeur correspondant, que les deux canaux (26, 36) sont fermés l'un par rapport à l'autre et que le canal (36) du deuxième distributeur (11) est raccordé à l'accumulateur (42) hydraulique et le canal (26) du distributeur (10) supplémentaire connecté au raccordement de pression de la pompe (27) hydraulique.
EP95917954A 1994-05-07 1995-04-25 Systeme hydraulique pour engin de chantier mobile, notamment un chargeur a roues Expired - Lifetime EP0759109B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4416228 1994-05-07
DE4416228A DE4416228A1 (de) 1994-05-07 1994-05-07 Hydraulische Anlage für ein mobiles Arbeitsgerät, insbesondere für einen Radlader
PCT/EP1995/001556 WO1995030800A1 (fr) 1994-05-07 1995-04-25 Systeme hydraulique pour engin de chantier mobile, notamment un chargeur a roues

Publications (2)

Publication Number Publication Date
EP0759109A1 EP0759109A1 (fr) 1997-02-26
EP0759109B1 true EP0759109B1 (fr) 1999-01-13

Family

ID=6517607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95917954A Expired - Lifetime EP0759109B1 (fr) 1994-05-07 1995-04-25 Systeme hydraulique pour engin de chantier mobile, notamment un chargeur a roues

Country Status (6)

Country Link
US (1) US5802847A (fr)
EP (1) EP0759109B1 (fr)
JP (1) JPH09512869A (fr)
KR (1) KR970702951A (fr)
DE (2) DE4416228A1 (fr)
WO (1) WO1995030800A1 (fr)

Families Citing this family (25)

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Publication number Priority date Publication date Assignee Title
DE19609787A1 (de) * 1996-03-13 1997-09-18 Bosch Gmbh Robert Hydrauliknotsteuerung für ein stufenloses Umschlingungsgetriebe mit erweitertem Handschaltventil
US5733095A (en) * 1996-10-01 1998-03-31 Caterpillar Inc. Ride control system
DE19711769C2 (de) * 1997-03-21 1999-06-02 Mannesmann Rexroth Ag Hydraulische Steueranordnung für eine mobile Arbeitsmaschine insbesondere für einen Radlader
DE19734658A1 (de) * 1997-08-11 1999-02-18 Mannesmann Rexroth Ag Hydraulische Steueranordnung für eine mobile Arbeitsmaschine, insbesondere für einen Radlader
DE19751357B4 (de) * 1997-11-20 2007-01-25 Bosch Rexroth Aktiengesellschaft Hydraulische Steueranordnung für eine mobile Arbeitsmaschine, insbesondere für einen Radlader, zur Dämpfung von Nickschwingungen
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
DE19823347A1 (de) * 1998-05-13 1999-11-18 Claas Ohg Einrichtung zur Steuerung und Einstellung von Arbeitszylindern
JP3622142B2 (ja) * 1999-08-04 2005-02-23 新キャタピラー三菱株式会社 作業機械の作業腕制御装置
US6357230B1 (en) * 1999-12-16 2002-03-19 Caterpillar Inc. Hydraulic ride control system
DE10133616A1 (de) * 2001-07-13 2003-01-30 Bosch Rexroth Ag Hydraulische Steueranordnung
US6655136B2 (en) 2001-12-21 2003-12-02 Caterpillar Inc System and method for accumulating hydraulic fluid
US6843489B2 (en) 2002-02-13 2005-01-18 Caterpillar Inc. Axle damping system and method
DE112004001897B4 (de) * 2003-10-10 2015-02-26 Komatsu Ltd. Fahrschwingungsunterdrückungsvorrichtung für ein Arbeitsfahrzeug
DE10354959A1 (de) 2003-11-25 2005-06-30 Bosch Rexroth Ag Hydraulische Steueranordnung für ein mobiles Arbeitsgerät
DE102004012945A1 (de) * 2004-03-17 2005-10-13 Cnh Baumaschinen Gmbh Vorrichtung und Verfahren zur Bewegungstilgung bei Baumaschinen
US7621124B2 (en) 2004-10-07 2009-11-24 Komatsu Ltd. Travel vibration suppressing device for working vehicle
JP4685417B2 (ja) * 2004-11-16 2011-05-18 日立建機株式会社 作業車両用液圧制御装置
EP1964982A1 (fr) * 2007-03-01 2008-09-03 Caterpillar, Inc. Système fluidique et méthode l'utilisant.
US20090057045A1 (en) * 2007-08-29 2009-03-05 Cnh America Llc Hydraulic system to deter lift arm chatter
CN102947599B (zh) * 2010-06-22 2015-03-11 日立建机株式会社 作业车辆的液压控制装置
US8858151B2 (en) * 2011-08-16 2014-10-14 Caterpillar Inc. Machine having hydraulically actuated implement system with down force control, and method
US10151080B2 (en) 2015-11-30 2018-12-11 The Charles Machine Works, Inc. Valve assembly for work attachment
JP6858629B2 (ja) * 2017-04-27 2021-04-14 川崎重工業株式会社 制振制御回路
US11781573B2 (en) * 2020-07-23 2023-10-10 Parker-Hannifin Corporation System, valve assembly, and methods for oscillation control of a hydraulic machine
JP2024126890A (ja) * 2023-03-08 2024-09-20 株式会社小松製作所 作業機械、作業機械の制御方法及び制御弁装置

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US5520499A (en) * 1994-07-12 1996-05-28 Caterpillar Inc. Programmable ride control

Also Published As

Publication number Publication date
US5802847A (en) 1998-09-08
DE59504825D1 (de) 1999-02-25
KR970702951A (ko) 1997-06-10
DE4416228A1 (de) 1995-11-09
EP0759109A1 (fr) 1997-02-26
WO1995030800A1 (fr) 1995-11-16
JPH09512869A (ja) 1997-12-22

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