EP1138956B1 - Hydraulischer Schaltkreis zur Ansteuerung mehrerer, hydraulischer Verbraucher - Google Patents

Hydraulischer Schaltkreis zur Ansteuerung mehrerer, hydraulischer Verbraucher Download PDF

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Publication number
EP1138956B1
EP1138956B1 EP01400708A EP01400708A EP1138956B1 EP 1138956 B1 EP1138956 B1 EP 1138956B1 EP 01400708 A EP01400708 A EP 01400708A EP 01400708 A EP01400708 A EP 01400708A EP 1138956 B1 EP1138956 B1 EP 1138956B1
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EP
European Patent Office
Prior art keywords
hydraulic
specific
pressure
receiver
function
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
EP01400708A
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English (en)
French (fr)
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EP1138956A1 (de
Inventor
Philippe Fillon
Patrick Koetzel
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 SAS
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Mannesmann Rexroth SA
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Publication of EP1138956A1 publication Critical patent/EP1138956A1/de
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Classifications

    • 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
    • F15B11/166—Controlling a pilot pressure in response to the load, i.e. supply to at least one user is regulated by adjusting either the system pilot pressure or one or more of the individual pilot command pressures
    • 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
    • F15B11/163—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation
    • 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
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F15B2211/3053—In combination with a pressure compensating valve
    • F15B2211/30555—Inlet and outlet of the pressure compensating valve being connected to the directional control valve
    • 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
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
    • 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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing valve
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5159—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • 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
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • 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
    • F15B2211/78—Control of multiple output members

Definitions

  • specific hydraulic distributor means we mean not a distributor means having a special structure and / or function (although it may actually be so), but only designate the distributor means included in the hydraulic circuit which is assigned specifically to actuation of said particular hydraulic receiver at high flow consumption.
  • the multiple hydraulic distribution comprising a multiplicity of distributor means having a function of detection of the highest charge pressure, a anti-saturation function and a division function of charge independent flow will be referred to, for simplify, "DDIC distributor device".
  • a common example of a hydraulic receiver requiring a large hydraulic flow is constituted by a large hydraulic hammer supported at the end of a articulated boom and arm system driven by cylinders respective hydraulics controlled by the above device DDIC distribution.
  • a receiver can also be for example a small hydraulic hand hammer, a reversible hydraulic motor driving a mower carried at the end of a system of articulated arms (treatment of roadside slopes), ....
  • the specific distributor means suitable for ordering particular receiver, was connected directly to the hydraulic source, in parallel on the device DDIC distributor. Under these conditions, when the particular receiver was in operation and he then absorbed all or at least the largest part of the flow supplied by the hydraulic source, actuation of another controlled hydraulic receiver by the DDIC distributor device was revealed impossible. For example, to fix ideas, while the hydraulic hammer was in operation it was one or more of the arms / boom cannot be controlled its support system to axially advance this hammer as the hole was dug.
  • the invention therefore aims to remedy, in as far as possible, to the aforementioned drawbacks of current practice and to propose an arrangement improved hydraulic circuit which allows order the above receiver appropriately particular kept in operation.
  • a hydraulic circuit for actuation multiple hydraulic loads as mentioned is characterized in the preamble, being arranged in accordance with the invention, in that the circuit pressure reducer hydraulic control of the specific distributor means is adjustable, thanks to which it is possible to preset the operating speed of said particular receiver and therefore to keep it running in predetermined conditions.
  • the hydraulic circuit of specific dispenser order includes in addition to a pressure limiter calibrated for a value predetermined corresponding to the maximum pressure admissible for the order of said distributor means specific.
  • the circuit hydraulic control of the specific distributor means further includes at least one control solenoid valve On Off.
  • the circuit hydraulic control of the specific distributor means includes two on / off control solenoid valves corresponding respectively to the two possible meanings of operation.
  • a hydraulic circuit which includes a hydraulic distribution device 1 which comprises a plurality of distributor means 2 which are assigned to the control of respective hydraulic receivers and which have a pressure detection function highest load (LS pressure) of all receptors, an anti-saturation function and a flow division independent of the load (means DDIC distributors).
  • the distribution device 1 comprises an input block 3, several distribution blocks 2 (here four blocks 2 1 to 2 4 are shown by way of example), and finally a final block 4.
  • the dispensing device 1 can be formed in the form of a sealed stack, face to face, of the blocks listed above.
  • Each inlet and distribution block is traversed face to face by three conduits, namely a conduit for supplying pressurized fluid P, a conduit for returning the working fluid T to a reservoir and a conduit for control fluid under the highest charge pressure (LS pressure). Because the blocks are stacked against each other, the various conduits follow one another and constitute three continuous lines of fluid circulation passing right through the distribution device 1 (line P, line T and line LS , respectively).
  • the final block 4 seals the terminal ends of the above three lines.
  • the inlet block 3 has an inlet port authorizing the connection of line P to a source S of fluid under pressure.
  • the source S consists of a variable flow pump 6 fitted a power regulator 7 controlled by the LS pressure delivered by the line LS of the distribution device 1; but other types of hydraulic source can be put implemented in the context of the invention.
  • the block inlet 3 has an outlet opening allowing the connection of line T to a tank R.
  • Input block 3 can be fitted with all organs (not shown) traditionally arranged in this location for effective operation and distribution device 1 and which are well known to those skilled in the art.
  • Each distribution block 2 2 to 2 4 can be constituted in a substantially identical manner.
  • a distributor of type DDIC 8 2 to three tracks and three positions (shown in neutral position) which is connected, on the one hand, to the above lines P, T and LS and, on the other hand, to two working orifices A 2 , B 2 to which a hydraulic receiver is connected 10 2 to be ordered by said distributor 8 2 .
  • the movement of the distributor valve 8 2 can for example be controlled hydraulically and in this case, as shown in FIG. 1, the two hydraulic controls associated with the opposite ends of the drawer are respectively connected to two respective control orifices a 2 , b 2 to which is connected an appropriate control member such as for example a manipulator or the like (not shown).
  • a two-way and three-position balance 9 2 receives the working fluid pressure (via the third way of the distributor 8 2 ) and the LS pressure, so that this balance is subjected to the difference between the LS pressure, by side, and the working pressure of the receiver 10 2 , on the other side, and that it establishes a connection with the line LS in the case where the working pressure of the receiver 10 2 becomes higher than the pressure LS.
  • Two pressure relief valves 11 2 are disposed respectively in the starting lines A 2 , B 2 .
  • the hydraulic receivers 10 2 , 10 3 and 10 4 may, for example, be hydraulic jacks animating the arms and boom of a work machine and be in any number.
  • the specific distributor block 2 1 is, for its part, for controlling a particular hydraulic receiver 12.
  • This receiver 12 is assumed, in the context of the invention, to absorb all or at least most of the flow supplied by the hydraulic source S.
  • a receiver can for example be a hydraulic hammer 12 1 carried at the end of the arm / boom system of the machine, or even be a hydraulic hand hammer 12 2 .
  • Such a receiver 12 operates in single-acting mode (spring return) and is therefore connected between only one of the working orifices (B 1 for example) of the block 2 1 and the reservoir. Therefore the other working orifice A 1 is annihilated.
  • the distributor block 2 1 can be identical to the block 2 2 described above, or else (as illustrated) be adapted to its particular control function by having only one pressure relief valve 11 1 associated with the working orifice B 1 and a single control of the distributor drawer 8 1 connected to the control orifice a 1 .
  • a control circuit 13 which incorporates a pressure reducer 14, which is of the adjustable type as shown in FIG. 1 to allow a presetting of the operating speed of the receiver 12.
  • the input from this pressure reducer 14 receives the pump pressure P and at the output is restored a reduced pressure (for example between 0 and 50 bars, against 150 to 250 bars for the pressure P) which is applied to the control input a 1 distributor block 2 1 .
  • a solenoid valve 15 with one channel and two positions ON and OFF respectively.
  • This solenoid valve can be controlled by an electrical switch (not shown) available to the user.
  • the specific distributor block 2 1 suitable for controlling the particular receiver 12 is included in series in the multiple distributor device DDIC 1 and it is subjected to the division of the flow independent of the load which authorizes the maintenance of this particular receiver 12 in operation when another of the receivers 10 2 to 10 4 is put into operation simultaneously.
  • said particular receiver 12 retains, thanks to its own control circuit 13, an appropriate control mode.
  • the slowdown that can occur in the simultaneous operation of the particular receiver and the other receiver due to insufficient flow provided by the source S is not a prohibitive annoyance of the causes the other receiver to operate only sequentially and for short periods of time.
  • Figure 2 shows a hydraulic diagram similar to that of Figure 1, but adapted to control a particular hydraulic receiver with two directions of operation. Therefore, such a circuit retains the possibility of controlling a tool with single-acting operation (large hydraulic hammer 12 1 or small hydraulic hand hammer 12 2 ), but also a double-acting cylinder 12 3 or a reversible hydraulic motor 12 4 .
  • the specific distributor block 2 1 is here arranged in the same way as the distributor block 2 2 described above. Its two outlet ports A 1 and B 1 are functional and two respective pressure relief valves 11 1 are used.
  • the distributor 8 1 is provided with two hydraulic controls respectively for each direction of movement of the slide, which are connected respectively to the control orifices a 1 and b 1 .
  • the control circuit 13 is arranged in the same way as in FIG. 1, except that the single solenoid valve is replaced by two solenoid valves 15 a1 and 15 b1 mounted so as to be activatable in opposition in order to ensure control. a 1 or b 1 , selectively.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Claims (6)

  1. Hydraulischer Schaltkreis zur Ansteuerung mehrerer hydraulischer Verbraucher, enthaltend:
    eine unter Druck stehende, hydraulische Ölquelle (S),
    wenigstens ein mehrfach wirkender hydraulischer Verteiler (1), enthaltend eins Mehrzahl von Verteilungsmitteln (22-24), die von der Ansteuerung der jeweiligen Verbraucher (102-104) beeinflusst werden und die eine Funktion zur Verringerung der höchsten Drucklast (Druck LS) besitzen, eine Funktion der Antisaturierung und eins von der Last unabhängige Funktion der Belastungsteilung,
    wenigstens ein spezifisches hydraulisches Verteilungsmittel (21), das von der Ansteuerung eines bestimmten hydraulischen Verbrauchers (12) beeinflusst wird, das, bei normaler Funktion, wenigstens den größten Teil der von der hydraulischen Quelle gelieferten maximalen Last aufnehmen kann, wobei das spezifische hydraulische Verteilungsmittel (21) seinerseits dergestalt ist, dass es eine Funktion zur Verringerung der höchsten Drucklast besitzt, eine Funktion der Antisaturierung und eine von der Last unabhängige Funktion der Belastungsteilung, und das ferner dergestalt ist, dass es in dem mehrfach wirkenden hydraulischen Verteiler (1) in Serie mit den anderen Verteilungsmitteln (22-24) enthalten ist, und,
    zwischen der hydraulischen Quelle (S) und wenigstens einem den bestimmten Verbraucher (12) ansteuernden Steuerungseingang (a1) des spezifischen hydraulischen Verteilungsmittels (21), einen hydraulischen Befehlsschaltkreis (13), der einen Druckminderer (14) enthält, der geeignet ist, den erhöhten Druck des hydraulischen Fluids vom Ausgang der Quelle bis zu einem Schaltwert zu senken, und zwar derart, dass wenigstens ein anderes Verteilungsmittel angesprochen werden kann, um einen anderen Verbraucher zu betätigen, während das genannte bestimmte Verteilungsmittel im Einsatz ist,
    dadurch gekennzeichnet, dass der Druckminderer (14) des hydraulischen Befehlsschaltkreises (13) des spezifischen hydraulischen Verteilungsmittels (21) regelbar ist, so dass es möglich ist, die Geschwindigkeit der Funktion des bestimmten Verbrauchers vorab festzusetzen.
  2. Hydraulischer Schaltkreis nach Anspruch 1, dadurch gekennzeichnet, dass der hydraulische Befehlsschaltkreis (13) des spezifischen Verteilungsmittels (21) unter anderem ein Mittel zur Druckbegrenzung (16) besitzt, das mit einem vorbestimmten Wert belastet ist, der dem zulässigen Maximaldruck für die Ansteuerung des spezifischen Verteilungsmittels (21) entspricht.
  3. Hydraulischer Schaltkreis nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass der hydraulische Befehlsschaltkreis (13) des spezifischen Verteilungsmittels (21) unter anderem wenigstens ein Elektroventil (15) mit den Befehlsoptionen An/Aus besitzt.
  4. Hydraulischer Schaltkreis nach einem der vorangegangenen Ansprüche, wobei der bestimmte Verbraucher (12) zwei mögliche Funktionsrichtungen aufweist, dadurch gekennzeichnet, dass der hydraulische Befehlsschaltkreis (13) des spezifischen Verteilungsmittels (21) zwei Elektroventile (15a1, 15b1) mit den Befehlsoptionen An/Aus besitzt, die jeweils den beiden möglichen Funktionsrichtungen entsprechen.
  5. Hydraulischer Schaltkreis nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass der bestimmte Verbraucher (12) ein hydraulischer Hammer/Schlagbolzen (121, 122) ist.
  6. Hydraulischer Schaltkreis nach Anspruch 4, dadurch gekennzeichnet, dass der bestimmte Verbraucher ein doppeltwirkendes Stellglied (123) oder ein Hydraulikmotor mit zweifacher Rotationsrichtung (124) ist.
EP01400708A 2000-03-28 2001-03-16 Hydraulischer Schaltkreis zur Ansteuerung mehrerer, hydraulischer Verbraucher Expired - Lifetime EP1138956B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0003900A FR2807118B1 (fr) 2000-03-28 2000-03-28 Circuit hydraulique pour l'actionnement de recepteurs hydrauliques multiples
FR0003900 2000-03-28
US09/817,798 US20020134079A1 (en) 2000-03-28 2001-03-26 Hydraulic circuit for actuating multiple hydraulic receivers

Publications (2)

Publication Number Publication Date
EP1138956A1 EP1138956A1 (de) 2001-10-04
EP1138956B1 true EP1138956B1 (de) 2003-05-07

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EP01400708A Expired - Lifetime EP1138956B1 (de) 2000-03-28 2001-03-16 Hydraulischer Schaltkreis zur Ansteuerung mehrerer, hydraulischer Verbraucher

Country Status (4)

Country Link
US (1) US20020134079A1 (de)
EP (1) EP1138956B1 (de)
JP (1) JP2001311405A (de)
FR (1) FR2807118B1 (de)

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KR101005060B1 (ko) * 2007-07-30 2010-12-30 볼보 컨스트럭션 이큅먼트 에이비 가변 제어장치를 갖는 중장비용 유압회로
CN101864786B (zh) * 2010-06-21 2011-10-12 三一重机有限公司 一种液压挖掘机行走减速机
ITUA20162611A1 (it) * 2016-04-14 2017-10-14 Cnh Ind Italia Spa Circuito idraulico di controllo e potenza e veicolo da costruzione comprendente tale circuito
CN111677490B (zh) * 2020-06-19 2023-07-14 中国铁建重工集团股份有限公司 一种水锤与取芯钻两用钻机的控制系统及多功能钻机
CN111691492B (zh) * 2020-06-30 2022-06-28 徐州徐工挖掘机械有限公司 挖掘机的液压系统和挖掘机
CN112695822A (zh) * 2021-02-01 2021-04-23 雷沃工程机械集团有限公司 一种挖掘机破碎锤控制系统

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KR19990087335A (ko) * 1996-02-28 1999-12-27 안자끼 사토루 유압구동기계의 제어장치
JP2000283110A (ja) * 1999-03-31 2000-10-13 Komatsu Ltd 油圧駆動機械の流量調整装置
JP3511500B2 (ja) * 2000-07-10 2004-03-29 新キャタピラー三菱株式会社 建設機械の油圧回路

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FR2807118A1 (fr) 2001-10-05
FR2807118B1 (fr) 2002-07-05
US20020134079A1 (en) 2002-09-26
JP2001311405A (ja) 2001-11-09
EP1138956A1 (de) 2001-10-04

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