EP1642034B1 - Hydraulic accumulator, especially piston-type accumulator - Google Patents

Hydraulic accumulator, especially piston-type accumulator Download PDF

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Publication number
EP1642034B1
EP1642034B1 EP04722164A EP04722164A EP1642034B1 EP 1642034 B1 EP1642034 B1 EP 1642034B1 EP 04722164 A EP04722164 A EP 04722164A EP 04722164 A EP04722164 A EP 04722164A EP 1642034 B1 EP1642034 B1 EP 1642034B1
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EP
European Patent Office
Prior art keywords
store
housing
accumulator
valve block
fluid
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
EP04722164A
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German (de)
French (fr)
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EP1642034A1 (en
Inventor
Norbert Weber
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Hydac Technology GmbH
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Hydac Technology GmbH
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Publication date
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Publication of EP1642034A1 publication Critical patent/EP1642034A1/en
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Publication of EP1642034B1 publication Critical patent/EP1642034B1/en
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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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port constructions
    • 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
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312—Sealings therefor, e.g. piston rings
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3152—Accumulator separating means having flexible separating means the flexible separating means being bladders
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means
    • 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
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports
    • F15B2201/4155—Gas ports having valve means

Definitions

  • the invention relates to a hydraulic accumulator, in particular piston accumulator, with a storage housing and with at least one gas space arranged therein and a fluid space, which are separated by a separating element, in particular in the form of a piston, according to the feature configuration of the preamble of claim 1.
  • hydraulic accumulators One of the main tasks of hydraulic accumulators is, among other things, to absorb certain volumes of pressurized fluids from a hydraulic system and to return these to the system on demand.
  • Piston accumulators, bladder accumulators, diaphragm accumulators, but also weight- and spring-loaded accumulators are used regularly as hydraulic accumulators. With this hydraulic accumulators can perform a variety of tasks, such as energy storage, shock, vibration and pulsation damping, energy recovery, volume flow compensation, etc ..
  • valve control units which are regularly provided with switching or directional control valves for controlling the fluid flow to and from the hydraulic accumulator.
  • the hydraulic accumulator is regularly connected to a piping with fluid lines, which establish the fluid-conducting connection between the memory and the valve control unit.
  • Disadvantages of the known Solution exist in the form of leakage problems by the increased number of connections between hydraulic accumulator piping and valve control unit and can also be seen in the additional costs for the piping to fluid lines. In particular, with tightly dimensioned installation conditions, it also offers problems to accommodate the plurality of said components obvious and to connect fluid carrying together.
  • various manufacturers are responsible for the hydraulic accumulators, the piping and / or the valves of the valve control unit, it comes in particular in places of installation on site to adjustment difficulties.
  • WO 02/40871 A2 is a hydraulic accumulator, in particular piston accumulator, known with a storage housing and arranged therein a gas space and a fluid space, which are separated by a separating element, wherein the fluid space via a switching valve having a valve control unit with a pressure medium be filled or at least partially emptied of this and wherein the switching valve is housed in an associated valve seat, which is movable in the direction of movement of the separating element in the form of the piston from an open position to a closed position and vice versa.
  • the valve control unit is accommodated in the known solution in a housing-independent valve block, wherein the valve block has a further valve receiving a further switching valve, which solves another switching task.
  • the ball valve is arranged as an independent component outside of the hydraulic accumulator housing and, in the open position, has a main fluid direction to be blocked along the longitudinal axis of the accumulator housing.
  • a comparable solution is also through the DE 101 61 475 A demonstrated.
  • the invention has for its object, while maintaining the advantages of the prior art, namely to provide a hydraulic accumulator which requires little overall installation space and allows a favorable fluid management of the fluid streams to be controlled, to further improve this, that it is inexpensive to manufacture and maintain, and that it can function reliably, especially when used in suspension systems on vehicles such as Dredging, tractors, etc ..
  • a related task solves a hydraulic accumulator with the features of claim 1 in its entirety.
  • a free end of the storage housing is closed by a valve block having the ball valve, that the passage direction of the ball valve in its open position extends transversely to the longitudinal axis of the storage housing, that the pivot axis of the Absperrteils of the ball valve eccentrically and arranged parallel to the longitudinal axis of the storage housing, that a part of the fluid-carrying path is arranged parallel and substantially off-center to the longitudinal axis of the storage housing, and that diametrically opposite to this longitudinal axis the shut-off of the ball valve is arranged, the ball valve via the valve block is an integral part of Storage housing and thus space-saving housed within the hydraulic storage solution, which also leads to a reduction of the free fluid paths and thus to savings in the piping.
  • the storage housing is closed by a ball valve having a valve block, which thereby forms part of the pressure-bearing wall of the hydraulic accumulator, resulting in a high-strength connection between said components memory and memory block.
  • the pertinent arrangement can be constructed in the manner of a modular modular system, can be about the components storage housing, valve block and ball valve cover a wide field of applications by the components are identical kit adapted to the fluid streams to be controlled and their pressures.
  • the suspension damping in a work machine such as a wheel loader
  • a work machine such as a wheel loader
  • the suspension accumulator is connected via the ball valve of the hydraulic accumulator. If the ball valve is operated by an operator by hand, eliminates any electrical control components in this area, so that the inventive solution can be realized very cost-effective and long-term reliable in operation.
  • the hydraulic accumulator is designed in the manner of a piston accumulator.
  • This has a storage housing 10 with a gas space 12 arranged therein and a fluid space 14.
  • the gas space 12 is separated from the fluid space 14 by a separating element 16 in the form of a piston, which is guided with its sealing system longitudinally displaceable along the inner circumference of the storage housing 10, so the ratio of gas space 12 to fluid space 14 is kept variable.
  • the piston or separating element 16 is formed as a hollow part and has a corresponding recess 18 in the interior.
  • the gas space 12 is closed to the outside on its right side by a flanged lid portion 20 having a central bore with gas valve body 22 through which the working gas, for example in the form of nitrogen gas, is introduced into the gas space 12 ,
  • the storage enclosure 10 is sealed gas-tight, via the valve 22 from time to time, the amount of gas in the gas chamber 12 verifiable and refillable via a refill (not shown).
  • valve control unit 26 has a ball valve 28, which is given in the figure in its open position again, in which it releases a fluid-carrying path 30 from the interior of the storage housing 10, here in the form of the fluid space 14 to the outside. In contrast, pivoted by 90 ° position it blocks the pertinent fluid-carrying path 30 from fluid-tight.
  • the passage direction of the ball valve 28 shown in the figure in its open position thus extends transversely to the longitudinal axis 34 of the storage housing 10 via the transverse axis 32.
  • the pivot axis 36 of the shut-off member 38 (plug) of the ball valve 28 is arranged off-center and parallel to the longitudinal axis 34 of the storage housing 10.
  • a portion 40 of the fluid-carrying path 30 within the valve block 24 extends parallel and eccentric and seen in the direction of the figure substantially below the longitudinal axis 34 of the storage enclosure 10. Diametrically to this part 40 and relative to the longitudinal axis 34 of the storage housing opposite is then the Absperrteil (Chick) 38 of the ball valve 28 is arranged.
  • Another part 42 of the fluid-carrying path 30 is formed by a screw-44, which is screwed transversely to the longitudinal axis 34 of the storage housing 10 extending into the valve block 24 on the outer peripheral side in the direction of the transverse axis 32.
  • a handle 46 which has an actuating handle 48.
  • the handle 46 also has a pivot pin 50 which engages with its one free end in a groove-shaped recess 52 of the spherical Absperrteils 38.
  • the trunnion 50 is provided with an engagement screw 54 which engages the operating handle 48 on the trunnion 50 rotatably holds, for which the operating handle 48 is provided with a surround 56 which engages around the pivot pin 50 in this area form fit.
  • the pivot pin 50 is pivotally supported by a flange-like widening 58 in the valve block 24 and the pivot pin 50 has between two edge-like segments 60 a ring seal 62, the thus the interior of the valve block 24, in particular with regard to the fluid-carrying path 30, with respect to the environment seals.
  • a stop ring 64 which cooperates with a stop pin 66 which is fixed in the valve block 24 substantially along the longitudinal axis 34 of the accumulator housing 10.
  • the shut-off 38 (chicks) pivot from its open position shown in the figure by 90 ° in a non-illustrated locking position, the pertinent pivoting is limited to the stop ring 64 with stop pin 66 as well the possible pivoting when resetting the Absperrteils 38 from its blocking position into the open position shown in the figure.
  • stop devices are common for ball valves, so that will not be discussed in more detail here at this point.
  • the storage housing 10 is preferably designed in the manner of a cylindrical hollow body and the valve block 24 engages over a cylindrical extension 68 and via a screw-in 70 in the one free end of the storage enclosure 10 a.
  • the pertinent extension 68 widens flange-like and radially outside the storage housing 10, wherein the thus obtained flange-like edge 72 of the valve block 24 forms a contact surface for the front end of the storage housing 10, which is to the edge 72 in the screwed-on state on the valve block 24 is supported.
  • the cylindrical extension 68 tapers in the direction of the fluid space 14 and, in the region of the tapering, has a sealing part 74 which seals the fluid space 14 from the surroundings in this area.
  • the described hydraulic accumulator designed as a piston accumulator may preferably be part of a suspension system not shown in detail with at least one not shown suspension accumulator, for example in the form of a conventional bladder or diaphragm accumulator.
  • the suspension accumulator not shown to this effect is connected via the fluid-carrying path 30 with the screw 44 of the hydraulic accumulator either directly or via another piping from its fluid side.
  • the damping of the suspension is then turned on, in which the fluid chamber 14 of the accumulator housing 10 is in communication with the fluid side of the suspension accumulator and thus pressure surges caused by the damping effect of the gas part of the suspension accumulator.
  • the handle 46 is actuated via the actuating handle 48 and the blocking part 38 (plug) of the ball valve 28 is brought into its fluid-conducting path 30 blocking position.
  • the suspension part of the suspension accumulator is switched off and accordingly blocks the damping device.
  • blocked or blocked damping can then od, for example, with the blade of a wheel loader, for the described hydraulic accumulator is used, in the soil, in bulk, etc. retract, without it unintentionally pitching movements on the vehicle comes in the form of the wheel loader itself. The latter significantly improves working with the blade device of a wheel loader.
  • the hydraulic accumulator according to the invention does not need to be limited to applications in wheel loaders, but can be used anywhere in suspension systems, where possible, waiving a complex control electronics in a simple and reliable manner switching on and off of damping devices, such as suspension accumulator od. Like. Wishes, for example in the field of earthworking devices in agricultural machinery. However, it is still within the scope of the invention to replace the manually operated handle 46 by an electric actuator in the manner of a servo motor, in order od such an automatic control of the hydraulic accumulator, for example, from a driver's cab. Like. Allow. If, in addition to the electrical adjusting device, the handle 46 with actuating handle 48 remains, such an emergency operation would be possible, if the electrical adjusting components should fail once.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Fluid-Damping Devices (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

Hydraulic accumulator, especially a piston-type accumulator, comprises an accumulator housing (10) containing at least one gas space (12) and one fluid space (14) that are separated by a separating element (16), especially in the form of a piston. A free end of the accumulator housing is terminated by a valve block (24) provided with a ball valve (28) which in its open or closed position releases or blocks a fluid-guiding path (30) leading outward from the inside of the accumulator housing. Preferred Features: The blocking part (38) of the ball valve is operated by hand via a handle (46). The valve block is arranged between the handle and the accumulator housing.

Description

Die Erfindung betrifft einen Hydrospeicher, insbesondere Kolbenspeicher, mit einem Speichergehäuse und mit mindestens einem darin angeordneten Gasraum und einem Fluidraum, die über ein Trennelement, insbesondere in Form eines Kolbens, voneinander getrennt sind gemäß der Merkmalsausgestaltung des Oberbegriffes des Patentanspruches 1.The invention relates to a hydraulic accumulator, in particular piston accumulator, with a storage housing and with at least one gas space arranged therein and a fluid space, which are separated by a separating element, in particular in the form of a piston, according to the feature configuration of the preamble of claim 1.

Eine der Hauptaufgaben von Hydrospeichern ist unter anderem, bestimmte Volumen unter Druck stehender Fluide einer hydraulischen Anlage aufzunehmen und diese auf Abruf wieder an die Anlage zurück zu geben. Als Hydrospeicher kommen dabei regelmäßig Kolbenspeicher, Blasenspeicher, Membranspeicher, aber auch gewichts- und federbelastete Speicher zum Einsatz. Mit dahingehenden Hydrospeichern läßt sich eine Vielzahl von Aufgaben realisieren, wie Energiespeicherung, Stoß-, Schwingungs- und Pulsationsdämpfung, Rückgewinnung von Energien, Volumenstromkompensation etc..One of the main tasks of hydraulic accumulators is, among other things, to absorb certain volumes of pressurized fluids from a hydraulic system and to return these to the system on demand. Piston accumulators, bladder accumulators, diaphragm accumulators, but also weight- and spring-loaded accumulators are used regularly as hydraulic accumulators. With this hydraulic accumulators can perform a variety of tasks, such as energy storage, shock, vibration and pulsation damping, energy recovery, volume flow compensation, etc ..

Für den Betrieb der Hydrospeicher und zu deren Ansteuerung dienen Ventilsteuereinheiten, die regelmäßig mit Schalt- oder Wegeventilen versehen sind zur Beherrschung des Fluidstroms vom und zum Hydrospeicher. Der Hydrospeicher ist dabei regelmäßig an eine Verrohrung mit Fluidleitungen angeschlossen, die die fluidführende Verbindung zwischen dem Speicher und der Ventilsteuereinheit herstellen. Nachteile der dahingehend bekannten Lösung, wie sie in einer Vielzahl von Ausführungsformen auf dem Markt frei zu erhalten ist, bestehen in Form von Dichtigkeitsproblemen durch die erhöhte Anzahl von Verbindungen zwischen Hydrospeicher-Verrohrungen und Ventilsteuereinheit und ist auch in den zusätzlichen Kosten für das Leitungsnetz an Fluidleitungen zu sehen. Insbesondere bei eng bemessenen Einbauverhältnissen bietet es darüber hinaus Probleme, die Vielzahl der genannten Komponenten sinnfällig unterzubringen und miteinander fluidführend zu verbinden. Da darüber hinaus verschiedene Hersteller sich verantwortlich zeichnen für die Hydrospeicher, die Verrohrung und/oder die Ventile der Ventilsteuereinheit, kommt es insbesondere an Stellen des Einbaus vor Ort zu Anpassungsschwierigkeiten.For the operation of the hydraulic accumulator and for their control are used valve control units, which are regularly provided with switching or directional control valves for controlling the fluid flow to and from the hydraulic accumulator. The hydraulic accumulator is regularly connected to a piping with fluid lines, which establish the fluid-conducting connection between the memory and the valve control unit. Disadvantages of the known Solution, as it is to be obtained in a variety of embodiments in the market, exist in the form of leakage problems by the increased number of connections between hydraulic accumulator piping and valve control unit and can also be seen in the additional costs for the piping to fluid lines. In particular, with tightly dimensioned installation conditions, it also offers problems to accommodate the plurality of said components obvious and to connect fluid carrying together. In addition, since various manufacturers are responsible for the hydraulic accumulators, the piping and / or the valves of the valve control unit, it comes in particular in places of installation on site to adjustment difficulties.

In der DE-A-39 41 241 ist bereits bei einem Kolbendruckspeicher, insbesondere für antriebsschlupfgeregelte Bremsanlagen, vorgeschlagen worden, ein Schaltventil in Form eines Ladeventils mit seiner Bewegungsrichtung in platzsparender Weise quer zur Bewegungsrichtung eines Druckspeicherkolbens sowie eines diesen umschließenden Formteils als Trennelement des Speichers vorzusehen und diesen über einen Kontrollschalter als Bewegungssensor für das Formteil in einem Ventilblock der Ventilsteuereinheit des Kolbendruckspeichers anzuordnen. Aufgrund der elektrischen Steuerkomponenten dieses bekannten Kolbendruckspeichers ist dieser aufwendig in der Herstellung und damit teuer und bei Ausfall der elektrischen Komponenten kommt es zu Funktionsausfällen.In the DE-A-39 41 241 is already in a piston accumulator, in particular for drive-slip-controlled brake systems, has been proposed to provide a switching valve in the form of a charging valve with its direction of movement in a space-saving manner transverse to the direction of movement of a pressure accumulator piston and a surrounding molding as part of the memory and this via a control switch as a motion sensor for the To arrange molding in a valve block of the valve control unit of the piston accumulator. Due to the electrical control components of this known piston accumulator this is expensive to manufacture and thus expensive and failure of the electrical components it comes to functional failures.

Durch die WO 02/40871 A2 ist ein Hydrospeicher, insbesondere Kolbenspeicher, bekannt mit einem Speichergehäuse und mit einem darin angeordneten Gasraum und einem Fluidraum, die über ein Trennelement voneinander getrennt sind, wobei der Fluidraum über eine ein Schaltventil aufweisende Ventilsteuereinheit mit einem Druckmedium befüllbar oder von diesem zumindest teilweise entleerbar ist und wobei das Schaltventil in einer zugehörigen Ventilaufnahme untergebracht ist, das in Bewegungsrichtung des Trennelementes in Form des Kolbens von einer Öffnungsstellung in eine Schließstellung und umgekehrt bewegbar ist. Die Ventilsteuereinheit ist bei der bekannten Lösung in einem zum Gehäuse eigenständigen Ventilblock aufgenommen, wobei der Ventilblock eine weitere Ventilaufnahme für ein weiteres Schaltventil aufweist, das eine andere Schaltaufgabe löst. Dadurch, dass für einen modularen Einsatz die genannten beiden Schaltventile als Gleichteile ausgebildet sind, ist ein aufwendiges Leitungsnetz zwischen dem Hydrospeicher und der Ventilsteuereinheit vermieden und Dichtigkeits- oder Leckageprobleme, wie im Leitungsnetz üblich, können erst gar nicht auftreten. Auch die dahingehende Hydrospeicherlösung ist aufwendig und somit teuer in der Herstellung und, sofern elektrisch angesteuerte Ventilsysteme zum Einsatz kommen, ist ein aufwendiges Steuerkonzept notwendig, was zu den bereits vorstehend beschriebenen Nachteilen, bezogen auf die Funktionssicherheit, führt.By the WO 02/40871 A2 is a hydraulic accumulator, in particular piston accumulator, known with a storage housing and arranged therein a gas space and a fluid space, which are separated by a separating element, wherein the fluid space via a switching valve having a valve control unit with a pressure medium be filled or at least partially emptied of this and wherein the switching valve is housed in an associated valve seat, which is movable in the direction of movement of the separating element in the form of the piston from an open position to a closed position and vice versa. The valve control unit is accommodated in the known solution in a housing-independent valve block, wherein the valve block has a further valve receiving a further switching valve, which solves another switching task. The fact that for a modular use, the said two switching valves are designed as equal parts, a complex network of lines between the hydraulic accumulator and the valve control unit is avoided and Dichtigkeits- or leakage problems, as usual in the network, can not even occur. The pertinent hydraulic storage solution is complicated and thus expensive to manufacture and, if electrically controlled valve systems are used, a complex control concept is necessary, which leads to the disadvantages already described above, based on the reliability.

Durch die DE 101 61 475 A1 ist eine weitere Hydrospeicherlösung bekannt mit einem Speicher-Anschlußblock mit Anschlüssen zum Anschließen eines Speichergefäßes einer Hydraulikpumpe sowie eines Tanks und mit einem 3-Wege-Hahn zum Absperren und Entlasten des Speichergefäßes. Das Absperrorgan des 3-Wege-Hahns ist nach Art einer Kugel ausgebildet, deren Schaltwelle zum ortsfesten Anordnen des Absperrorgans zentrisch gelagert ist und dessen die Bohrungsmündungen aufweisende Umfangsfläche an jeweils einer jedem Abgang zugeordneten Dichtungsanordnung anliegt. Bei dieser bekannten Lösung eines Speicheranschlußblokkes ist ein abgedichteter Sitz des nach Art einer Kugel ausgebildeten Absperrorgans in jeder Stellung des Hahns gewährleistet. Bei der bekannten Lösung ist der Speicher-Anschlußblock vom eigentlichen Hydrospeicher über eine Rohrleitung räumlich getrennt.By the DE 101 61 475 A1 Another hydraulic storage solution is known with a memory connection block with connections for connecting a storage vessel of a hydraulic pump and a tank and with a 3-way stopcock for shutting off and relieving the storage vessel. The obturator of the 3-way stopcock is designed in the manner of a ball, the switching shaft is mounted centrally for the stationary positioning of the obturator and abuts the bore mouths having circumferential surface of each associated with each outlet seal assembly. In this known solution of a Speicheranschlußblokkes a sealed seat of the manner of a ball designed obturator is guaranteed in any position of the cock. In the known Solution is the storage port block from the actual hydraulic accumulator via a pipeline spatially separated.

Durch die DE 196 16 501 C ist eine gattungsgemäße Hydrospeicher-, insbesondere Kolbenspeicherlösung bekannt mit einem Speichergehäuse und mit mindestens einem darin angeordneten Gasraum und einem Fluidraum, die über ein Trennelement, insbesondere in Form eines Kolbens, voneinander getrennt sind, wobei der Hydrospeicher einen Kugelhahn aufweist, der in seiner Öffnungs- oder Schließstellung einen fluidführenden Weg vom Inneren des Speichergehäuses nach außen freigibt bzw. absperrt. Dadurch, dass bei der bekannten Lösung mittels einer Einstellvorrichtung die Lage des Trennkolbens innerhalb des Gehäuses derart vorgebbar ist, dass mindestens in einer Verfahrrichtung zumindest für einen hydraulischen Einstellvorgang ein Anschlag gebildet ist, der das Volumen des zugeordneten Teilraumes begrenzt, ist ein Kolbenspeicher geschaffen, der insbesondere die Vornahme von Einstellvorgängen bei hydraulischen Anlagen für eine Bedienperson erleichtert. Bei der bekannten Lösung ist der Kugelhahn als eigenständiges Bauteil außerhalb des Hydrospeichergehäuses angeordnet und weist in der Öffnungsstellung eine zu sperrende Hauptfluidrichtung entlang der Längsachse des Speichergehäuses auf. Eine vergleichbare Lösung ist auch durch die DE 101 61 475 A aufgezeigt.By the DE 196 16 501 C is a generic Hydrospeicher-, in particular piston accumulator solution known with a storage housing and at least one gas space and a fluid space therein, which are separated by a separating element, in particular in the form of a piston, the hydraulic accumulator having a ball valve in its opening or closed position releases a fluid-carrying path from the interior of the storage enclosure to the outside or shut off. Due to the fact that in the known solution by means of a setting device, the position of the separating piston within the housing can be predetermined such that at least in one direction at least for a hydraulic adjustment a stop is formed, which limits the volume of the associated subspace, a piston accumulator is created in particular facilitates the making of adjustment operations in hydraulic systems for an operator. In the known solution, the ball valve is arranged as an independent component outside of the hydraulic accumulator housing and, in the open position, has a main fluid direction to be blocked along the longitudinal axis of the accumulator housing. A comparable solution is also through the DE 101 61 475 A demonstrated.

Ausgehend von diesem Stand der Technik liegt der Erfindung die Aufgabe zugrunde, unter Beibehalten der Vorteile im Stand der Technik, nämlich einen Hydrospeicher zu schaffen, der insgesamt wenig Einbauraum benötigt und der eine günstige Fluidführung der zu beherrschenden Fluidströme erlaubt, diesen derart weiter zu verbessern, dass er kostengünstig in der Herstellung und in der Wartung ist und einen funktionssicheren Betrieb erlaubt, insbesondere bei Verwendung in Federungssystemen bei Fahrzeugen, wie Baggern, Ackerschleppern etc.. Eine dahingehende Aufgabe löst ein Hydrospeicher mit den Merkmalen des Patentanspruches 1 in seiner Gesamtheit.Based on this prior art, the invention has for its object, while maintaining the advantages of the prior art, namely to provide a hydraulic accumulator which requires little overall installation space and allows a favorable fluid management of the fluid streams to be controlled, to further improve this, that it is inexpensive to manufacture and maintain, and that it can function reliably, especially when used in suspension systems on vehicles such as Dredging, tractors, etc .. A related task solves a hydraulic accumulator with the features of claim 1 in its entirety.

Dadurch, dass gemäß dem kennzeichnenden Teil des Patentanspruches 1 das eine freie Ende des Speichergehäuses über einen Ventilblock abgeschlossen ist, der den Kugelhahn aufweist, dass die Durchlaßrichtung des Kugelhahns in seiner Öffnungsstellung quer zur Längsachse des Speichergehäuses verläuft, dass die Schwenkachse des Absperrteils des Kugelhahns außermittig und parallel zur Längsachse des Speichergehäuses angeordnet ist, dass ein Teil des fluidführenden Weges parallel und im wesentlichen außermittig zur Längsachse des Speichergehäuses angeordnet ist, und dass diametral zu dieser Längsachse gegenüberliegend das Absperrteil des Kugelhahns angeordnet ist, ist der Kugelhahn über den Ventilblock integraler Bestandteil des Speichergehäuses und dergestalt platzsparend innerhalb der Hydrospeicherlösung untergebracht, was auch zu einer Reduzierung der freien Fluidwege und mithin zu Einsparungen bei der Verrohrung führt. Mit der erfindungsgemäßen Lösung wird das Speichergehäuse über einen, einen Kugelhahn aufweisenden Ventilblock abgeschlossen, welcher dadurch einen Teil der drucktragenden Wand des Hydrospeichers bildet, was zu einem hochfesten Anschluß zwischen den genannten Komponenten Speicher und Speicherblock führt.Characterized in that according to the characterizing part of claim 1, a free end of the storage housing is closed by a valve block having the ball valve, that the passage direction of the ball valve in its open position extends transversely to the longitudinal axis of the storage housing, that the pivot axis of the Absperrteils of the ball valve eccentrically and arranged parallel to the longitudinal axis of the storage housing, that a part of the fluid-carrying path is arranged parallel and substantially off-center to the longitudinal axis of the storage housing, and that diametrically opposite to this longitudinal axis the shut-off of the ball valve is arranged, the ball valve via the valve block is an integral part of Storage housing and thus space-saving housed within the hydraulic storage solution, which also leads to a reduction of the free fluid paths and thus to savings in the piping. With the solution according to the invention, the storage housing is closed by a ball valve having a valve block, which thereby forms part of the pressure-bearing wall of the hydraulic accumulator, resulting in a high-strength connection between said components memory and memory block.

Da die dahingehende Anordnung in der Art eines modularen Baukastensystems aufbaubar ist, läßt sich über die Komponenten Speichergehäuse, Ventilblock und Kugelhahn ein weites Feld an Anwendungsmöglichkeiten abdecken, indem die jeweiligen Komponenten baukastengleich an die zu beherrschenden Fluidströme und ihre Drücke angepaßt werden.Since the pertinent arrangement can be constructed in the manner of a modular modular system, can be about the components storage housing, valve block and ball valve cover a wide field of applications by the components are identical kit adapted to the fluid streams to be controlled and their pressures.

Sofern für die Betätigung des Kugelhahns auf elektrische Stelleinrichtungen verzichtet wird, ist dergestalt für den Hydrospeicher eine rein mechanische Lösung erreicht, die ausgesprochen funktionssicher ist und in sehr kostengünstiger Weise den Betrieb des Hydrospeichers erlaubt. Findet ein dahingehender Hydrospeicher Einsatz bei einem Federungssystem mit einem Federungsspeicher, der über den fluidführenden Weg mit dem Hydrospeicher verbunden ist, wobei in der Öffnungsstellung der Kugelhahn für eine Federung des Federungsspeichers zugeschaltet und in seiner Sperrstellung derart weggeschaltet ist, dass die Federung blockiert, ist eine sehr einfache kostengünstige Lösung erreicht für die Ansteuerung und Beherrschung eines Federungssystems, wie es insbesondere bei Baggern, Landmaschinen und dergleichen Verwendung findet. So kann beispielsweise die Federungsdämpfung bei einer Arbeitsmaschine, wie einem Radlader, über den integrierten Kugelhahn des Hydrospeichers abgeschaltet werden, sobald mit der Schaufel des Radladers Arbeitsaufgaben, wie Aufnahme einer Last, durchgeführt werden, so dass dergestalt schädliche Aufschwingvorgänge für den Radlader selbst vermieden sind und sobald Transportaufgaben mit oder ohne Last, beispielsweise im Straßenbetrieb, anstehen, wird der Federungsspeicher über den Kugelhahn des Hydrospeichers zugeschaltet. Sofern der Kugelhahn durch eine Bedienperson von Hand betätigt wird, entfallen in diesem Bereich jegliche elektrische Steuerungskomponenten, so dass die erfindungsgemäße Lösung sich sehr kostengünstig realisieren läßt und lang andauernd funktionssicher im Betrieb ist.If the operation of the ball valve is dispensed with electrical adjusting devices, a purely mechanical solution is achieved for the hydraulic accumulator, which is extremely reliable and allows the operation of the hydraulic accumulator in a very cost-effective manner. Finds a pertinent hydraulic accumulator use in a suspension system with a suspension accumulator, which is connected via the fluid-carrying path with the hydraulic accumulator, being switched in the open position of the ball valve for suspension of the suspension accumulator and switched away in its blocking position such that the suspension blocks, is a very simple cost-effective solution achieved for the control and mastery of a suspension system, as it finds particular use in excavators, agricultural machinery and the like. Thus, for example, the suspension damping in a work machine, such as a wheel loader, be switched off via the integrated ball valve of the hydraulic accumulator as soon as with the blade of the wheel loader work tasks, such as recording a load, are performed, so that such harmful Aufschwingvorgänge for the wheel loader itself are avoided and as soon as transport tasks with or without load, for example in road mode, pending, the suspension accumulator is connected via the ball valve of the hydraulic accumulator. If the ball valve is operated by an operator by hand, eliminates any electrical control components in this area, so that the inventive solution can be realized very cost-effective and long-term reliable in operation.

Weitere vorteilhafte Ausführungsformen des erfindungsgemäßen Hydrospeichers sind Gegenstand der Unteransprüche.Further advantageous embodiments of the hydraulic accumulator according to the invention are the subject of the dependent claims.

Im folgenden wird der erfindungsgemäße Hydrospeicher anhand der Zeichnung näher erläutert. Es zeigt in prinzipieller und nicht maßstäblicher Darstellung die einzige Figur teilweise im Schnitt, teilweise in Ansicht, eine Längsdarstellung auf den Hydrospeicher.In the following, the hydraulic accumulator according to the invention will be explained in more detail with reference to the drawing. It shows in a principal and not to scale representation of the only figure partially in section, partly in view, a longitudinal view of the hydraulic accumulator.

Der Hydrospeicher nach der Figur ist in der Art eines Kolbenspeichers ausgebildet. Dieser weist ein Speichergehäuse 10 auf mit einem darin angeordneten Gasraum 12 und einem Fluidraum 14. Der Gasraum 12 ist gegenüber dem Fluidraum 14 über ein Trennelement 16 in Form eines Kolbens getrennt, der mit seinem Dichtsystem längsverschiebbar entlang des Innenumfangs des Speichergehäuses 10 geführt ist, so dass das Verhältnis von Gasraum 12 zu Fluidraum 14 veränderlich gehalten ist. Um eine größere Gasmenge an Arbeitsgas (Stickstoffgas) in dem Gasraum 12 bevorraten zu können, ist das Kolben- oder Trennelement 16 als Hohlteil ausgebildet und weist im Inneren eine entsprechende Ausnehmung 18 auf. In Blickrichtung auf die Figur gesehen ist der Gasraum 12 nach außen hin auf seiner rechten Seite von einem umgebördelten Deckelteil 20 abgeschlossen, das über eine Mittenbohrung mit Gasventilkörper 22 verfügt, über die das Arbeitsgas, beispielsweise in Form von Stickstoffgas, in den Gasraum 12 einbringbar ist. Über den Gasventilkörper 22 ist das Speichergehäuse 10 gasdicht verschlossen, wobei über das Ventil 22 auch von Zeit zu Zeit die Gasmenge im Gasraum 12 nachprüfbar und über eine Nachfülleinrichtung (nicht dargestellt) nachfüllbar ist.The hydraulic accumulator according to the figure is designed in the manner of a piston accumulator. This has a storage housing 10 with a gas space 12 arranged therein and a fluid space 14. The gas space 12 is separated from the fluid space 14 by a separating element 16 in the form of a piston, which is guided with its sealing system longitudinally displaceable along the inner circumference of the storage housing 10, so the ratio of gas space 12 to fluid space 14 is kept variable. In order to store a larger amount of gas at working gas (nitrogen gas) in the gas space 12, the piston or separating element 16 is formed as a hollow part and has a corresponding recess 18 in the interior. Seen in the direction of the figure, the gas space 12 is closed to the outside on its right side by a flanged lid portion 20 having a central bore with gas valve body 22 through which the working gas, for example in the form of nitrogen gas, is introduced into the gas space 12 , About the gas valve body 22, the storage enclosure 10 is sealed gas-tight, via the valve 22 from time to time, the amount of gas in the gas chamber 12 verifiable and refillable via a refill (not shown).

An gegenüberliegenden Enden des Speichergehäuses 10 schließt sich in der Art eines Steuer- oder Ventilblockes 24 die als Ganzes mit 26 bezeichnete Ventilsteuereinheit an. Die Ventilsteuereinheit 26 verfügt über einen Kugelhahn 28, der in der Figur in seiner Öffnungsstellung wieder gegeben ist, bei der er einen fluidführenden Weg 30 vom Inneren des Speichergehäuses 10, hier in Form des Fluidraumes 14, nach außen freigibt. In seiner demgegenüber um 90° verschwenkten Stellung sperrt er den dahingehenden fluidführenden Weg 30 fluiddicht ab. Die in der Figur gezeigte Durchlaßrichtung des Kugelhahns 28 in seiner Öffnungsstellung verläuft also über die Querachse 32 quer zur Längsachse 34 des Speichergehäuses 10.At opposite ends of the accumulator housing 10 is followed in the manner of a control or valve block 24 to the designated as a whole with 26 valve control unit. The valve control unit 26 has a ball valve 28, which is given in the figure in its open position again, in which it releases a fluid-carrying path 30 from the interior of the storage housing 10, here in the form of the fluid space 14 to the outside. In contrast, pivoted by 90 ° position it blocks the pertinent fluid-carrying path 30 from fluid-tight. The passage direction of the ball valve 28 shown in the figure in its open position thus extends transversely to the longitudinal axis 34 of the storage housing 10 via the transverse axis 32.

Ferner ist die Schwenkachse 36 des Absperrteils 38 (Küken) des Kugelhahns 28 außermittig und parallel zur Längsachse 34 des Speichergehäuses 10 angeordnet. Ein Teil 40 des fluidführenden Weges 30 innerhalb des Ventilblockes 24 verläuft parallel und außermittig sowie in Blickrichtung auf die Figur gesehen im wesentlichen unterhalb zur Längsachse 34 des Speichergehäuses 10. Diametral zu diesem Teil 40 und bezogen auf die Längsachse 34 des Speichergehäuses gegenüberliegend ist dann das Absperrteil (Küken) 38 des Kugelhahns 28 angeordnet. Ein weiterer Teil 42 des fluidführenden Weges 30 ist durch ein Einschraubteil 44 gebildet, das quer zur Längsachse 34 des Speichergehäuses 10 verlaufend in den Ventilblock 24 außenumfangsseitig in Richtung der Querachse 32 eingeschraubt ist.Furthermore, the pivot axis 36 of the shut-off member 38 (plug) of the ball valve 28 is arranged off-center and parallel to the longitudinal axis 34 of the storage housing 10. A portion 40 of the fluid-carrying path 30 within the valve block 24 extends parallel and eccentric and seen in the direction of the figure substantially below the longitudinal axis 34 of the storage enclosure 10. Diametrically to this part 40 and relative to the longitudinal axis 34 of the storage housing opposite is then the Absperrteil (Chick) 38 of the ball valve 28 is arranged. Another part 42 of the fluid-carrying path 30 is formed by a screw-44, which is screwed transversely to the longitudinal axis 34 of the storage housing 10 extending into the valve block 24 on the outer peripheral side in the direction of the transverse axis 32.

Zur Betätigung des Absperrteils 38 des Kugelhahn 28 dient eine Handhabe 46, die einen Betätigungsgriff 48 aufweist. Die Handhabe 46 weist darüber hinaus einen Drehzapfen 50 auf, der mit seinem einen freien Ende in eine nutförmige Ausnehmung 52 des kugelförmigen Absperrteils 38 eingreift. An seinem anderen freien Ende ist der Drehzapfen 50 mit einer Eingriffsschraube 54 versehen, die den Betätigungsgriff 48 dergestalt an dem Drehzapfen 50 drehsicher festhält, wofür der Betätigungsgriff 48 mit einer Umfassung 56 versehen ist, die in diesem Bereich den Drehzapfen 50 formschlüssig umgreift. Ansonsten ist der Drehzapfen 50 über eine flanschartige Verbreiterung 58 im Ventilblock 24 schwenkbar gelagert und der Drehzapfen 50 weist zwischen zwei randartigen Segmenten 60 eine Ringdichtung 62 auf, die dergestalt das Innere des Ventilblockes 24, insbesondere im Hinblick auf den fluidführenden Weg 30, gegenüber der Umgebung abdichtet.To actuate the Absperrteils 38 of the ball valve 28 is a handle 46 which has an actuating handle 48. The handle 46 also has a pivot pin 50 which engages with its one free end in a groove-shaped recess 52 of the spherical Absperrteils 38. At its other free end, the trunnion 50 is provided with an engagement screw 54 which engages the operating handle 48 on the trunnion 50 rotatably holds, for which the operating handle 48 is provided with a surround 56 which engages around the pivot pin 50 in this area form fit. Otherwise, the pivot pin 50 is pivotally supported by a flange-like widening 58 in the valve block 24 and the pivot pin 50 has between two edge-like segments 60 a ring seal 62, the thus the interior of the valve block 24, in particular with regard to the fluid-carrying path 30, with respect to the environment seals.

Des weiteren ist am stirnseitigen Ende des Ventilblockes 24 der Drehzapfen 50 mit einem Anschlagring 64 versehen, der mit einem Anschlagzapfen 66 zusammenwirkt, der im Ventilblock 24 festgelegt im wesentlichen entlang der Längsachse 34 des Speichergehäuses 10 verläuft. Dergestalt läßt sich über den Betätigungsgriff 48 und den Drehzapfen 50 das Absperrteil 38 (Küken) von seiner in der Figur gezeigten Öffnungsstellung um 90° in eine nicht näher dargestellte Sperrstellung verschwenken, wobei der dahingehende Schwenkweg über den Anschlagring 64 mit Anschlagzapfen 66 begrenzt ist ebenso wie der mögliche Schwenkweg bei Rückstellung des Absperrteils 38 von seiner Sperrstellung in die in der Figur gezeigte Öffnungsstellung. Dahingehende Anschlageinrichtungen sind für Kugelhähne üblich, so dass an dieser Stelle hierauf nicht mehr näher eingegangen wird.Furthermore, at the front end of the valve block 24 of the pivot pin 50 is provided with a stop ring 64 which cooperates with a stop pin 66 which is fixed in the valve block 24 substantially along the longitudinal axis 34 of the accumulator housing 10. In this way can be about the operating handle 48 and the pivot pin 50, the shut-off 38 (chicks) pivot from its open position shown in the figure by 90 ° in a non-illustrated locking position, the pertinent pivoting is limited to the stop ring 64 with stop pin 66 as well the possible pivoting when resetting the Absperrteils 38 from its blocking position into the open position shown in the figure. These stop devices are common for ball valves, so that will not be discussed in more detail here at this point.

Das Speichergehäuse 10 ist vorzugsweise in der Art eines zylindrischen Hohlkörper ausgebildet und der Ventilblock 24 greift über einen zylindrischen Fortsatz 68 und über eine Einschraubstrecke 70 in das eine freie Ende des Speichergehäuses 10 ein. Der dahingehende Fortsatz 68 verbreitert sich flanschartig und radial außerhalb des Speichergehäuses 10, wobei der dahingehend erhaltene flanschartige Rand 72 des Ventilblockes 24 eine Anlagefläche für das stirnseitige Ende des Speichergehäuses 10 bildet, das sich dahingehend an dem Rand 72 im aufgeschraubten Zustand auf dem Ventilblock 24 abstützt. Ferner verjüngt sich der zylindrische Fortsatz 68 in Richtung des Fluidraumes 14 und weist im Bereich der dahingehenden Verjüngung ein Dichtteil 74 auf, das den Fluidraum 14 gegenüber der Umgebung in diesem Bereich abdichtet.The storage housing 10 is preferably designed in the manner of a cylindrical hollow body and the valve block 24 engages over a cylindrical extension 68 and via a screw-in 70 in the one free end of the storage enclosure 10 a. The pertinent extension 68 widens flange-like and radially outside the storage housing 10, wherein the thus obtained flange-like edge 72 of the valve block 24 forms a contact surface for the front end of the storage housing 10, which is to the edge 72 in the screwed-on state on the valve block 24 is supported. Furthermore, the cylindrical extension 68 tapers in the direction of the fluid space 14 and, in the region of the tapering, has a sealing part 74 which seals the fluid space 14 from the surroundings in this area.

Der beschriebene Hydrospeicher als Kolbenspeicher ausgebildet, kann vorzugsweise Bestandteil eines nicht näher dargestellten Federungssystems sein mit mindestens einem nicht näher dargestellten Federungsspeicher, beispielsweise in Form eines üblichen Blasen- oder Membranspeichers. Der dahingehend nicht näher dargestellte Federungsspeicher ist über den fluidführenden Weg 30 mit dem Einschraubteil 44 des Hydrospeichers entweder direkt oder über eine weitere Verrohrung von seiner Fluidseite her angeschlossen. In der in der Figur gezeigten Öffnungsstellung des Kugelhahns 28 ist dann die Dämpfung der Federung eingeschaltet, bei der der Fluidraum 14 des Speichergehäuses 10 mit der Fluidseite des Federungsspeichers in Verbindung steht und dergestalt werden Druckstöße durch die dämpfende Wirkung des Gasteils des Federungsspeichers bewirkt. Will man nun die dahingehende dämpfende Wirkung des Federungsspeichers eliminieren, wird über den Betätigungsgriff 48 die Handhabe 46 betätigt und dergestalt das Absperrteil 38 (Küken) des Kugelhahns 28 in seine den fluidführenden Weg 30 sperrende Stellung gebracht. Auf diese Art und Weise ist der Federungsteil des Federungsspeichers weggeschaltet und demgemäß die Dämpfungseinrichtung blockiert. Bei blockierter oder gesperrter Dämpfung kann dann beispielsweise mit der Schaufel eines Radladers, für den der beschrieben Hydrospeicher eingesetzt wird, in das Erdreich, in Schüttgut od. dgl. einfahren, ohne dass es ungewollt zu Nickbewegungen am Fahrzeug in Form des Radladers selbst kommt. Letzteres verbessert deutlich das Arbeiten mit der Schaufeleinrichtung eines Radladers. Ist die Last durch die Schaufel dann aufgenommen, kann für einen Abtransport auf einer Straße od. dgl. die Federung wieder zugeschaltet werden, indem in umgekehrter Reihenfolge, wie beschrieben, über den Betätigungsgriff 48 der Kugelhahn 28 in seine in der Figur gezeigte Öffnungsstellung gebracht wird, bei der das Dämpfungsteil des Federungsspeichers über den fluidführenden Weg 30 dann wieder zugeschaltet ist.The described hydraulic accumulator designed as a piston accumulator, may preferably be part of a suspension system not shown in detail with at least one not shown suspension accumulator, for example in the form of a conventional bladder or diaphragm accumulator. The suspension accumulator not shown to this effect is connected via the fluid-carrying path 30 with the screw 44 of the hydraulic accumulator either directly or via another piping from its fluid side. In the open position of the ball valve 28 shown in the figure, the damping of the suspension is then turned on, in which the fluid chamber 14 of the accumulator housing 10 is in communication with the fluid side of the suspension accumulator and thus pressure surges caused by the damping effect of the gas part of the suspension accumulator. If one now wants to eliminate the pertinent damping effect of the suspension accumulator, the handle 46 is actuated via the actuating handle 48 and the blocking part 38 (plug) of the ball valve 28 is brought into its fluid-conducting path 30 blocking position. In this way, the suspension part of the suspension accumulator is switched off and accordingly blocks the damping device. With blocked or blocked damping can then od, for example, with the blade of a wheel loader, for the described hydraulic accumulator is used, in the soil, in bulk, etc. retract, without it unintentionally pitching movements on the vehicle comes in the form of the wheel loader itself. The latter significantly improves working with the blade device of a wheel loader. Is the load through the Shovel then added od for removal on a road or the like. The suspension can be switched on again by the ball valve 28 is brought in its open position shown in the figure in the reverse order, as described, via the operating handle 48, wherein the damping member the suspension accumulator via the fluid-carrying path 30 is then reconnected.

Der erfindungsgemäße Hydrospeicher braucht nicht auf Anwendungen bei Radladern beschränkt zu sein, sondern kann überall dort in Federungssystemen eingesetzt werden, wo man nach Möglichkeit unter Verzicht auf eine aufwendige Steuerungs- und Regelungselektronik in einfacher und funktionssicherer Weise ein Zu- und Abschalten von Dämpfungsvorrichtungen, wie Federungsspeicher od. dgl., wünscht, beispielsweise im Bereich von erdbearbeitenden Vorrichtungen bei Landmaschinen. Es liegt aber noch im Bereich der Erfindung, die von Hand zu betätigende Handhabe 46 durch einen elektrischen Stellantrieb in der Art eines Stellmotors zu ersetzen, um dergestalt eine automatische Ansteuerung des Hydrospeichers, beispielsweise von einer Fahrerkabine od. dgl., zu ermöglichen. Sofern neben der elektrischen Stelleinrichtung die Handhabe 46 mit Betätigungsgriff 48 verbleibt, wäre dergestalt eine Notbetätigung möglich, sofern die elektrischen Stellkomponenten einmal ausfallen sollten.The hydraulic accumulator according to the invention does not need to be limited to applications in wheel loaders, but can be used anywhere in suspension systems, where possible, waiving a complex control electronics in a simple and reliable manner switching on and off of damping devices, such as suspension accumulator od. Like. Wishes, for example in the field of earthworking devices in agricultural machinery. However, it is still within the scope of the invention to replace the manually operated handle 46 by an electric actuator in the manner of a servo motor, in order od such an automatic control of the hydraulic accumulator, for example, from a driver's cab. Like. Allow. If, in addition to the electrical adjusting device, the handle 46 with actuating handle 48 remains, such an emergency operation would be possible, if the electrical adjusting components should fail once.

Claims (6)

  1. Hydro store, in particular piston store, with a store housing (10) and with at least one gas chamber (12) located therein and a fluid chamber (14), separated from each other by means of a separating element (16), in particular in the form of a piston, whereby the hydro store comprises a ball cock (28), the same releasing a fluid conveying path (30) towards, e.g. blocking the same against the outside from the interior of the store housing (10) in its opened or closed position, characterised in that the one free end of the store housing (10) is closed across a valve block (24) comprising the ball cock (28), in that the flow direction (32) of the ball cock (28) extends transverse to the longitudinal axis (34) of the store housing (10) in its opened position, in that the tilt axis (36) of the blocking part (38) of the ball cock (28) is off centre and parallel to the longitudinal axis (34) of the store housing (10), in that a part (40) of the fluid conveying path (30) is located parallel and substantially off centre to the longitudinal axis (34) of the store housing (10), and in that the blocking part (38) of the ball cock (28) is located diametrically opposite to this longitudinal axis (34).
  2. Hydro store according to Claim 1, characterised in that a further part (42) of the fluid conveying path (30) is formed by a screw-in part (44) extending transverse to the longitudinal axis (34) of the store housing (10), screwed into the outer circumference of the valve block (24).
  3. Hydro store according to Claim 1 or 2, characterised in that the blocking part (38) of the ball cock (28) can be manually activated by means of a handle (46), and in that the valve block (24) is located between the handle (46) and the store housing (10).
  4. Hydro store according to Claim 3, characterised in that the activating grip (48) of the handle (46) points in the opposite direction to the further part (42) of the fluid conveying path (30) formed by the screw-in part (44) in the opened position of the ball cock (28).
  5. Hydro store according to one of the preceding Claims 1 to 4, characterised in that the valve block (24) can be screwed into the one free end of the store housing (10) by means of a cylindrical extension (68) and by means of a screw-in section (70), in that the said extension (68) radially widens in the way of a flange outside the store housing (10), and in that this flange like edge (72) of the valve block (24) forms an abutment surface for the facing side end of the store housing (10).
  6. Hydro store according to Claim 5, characterised in that the valve block (24) comprises at least one sealing part (74) around its outer circumference in the direction of the free end of the extension (68)
EP04722164A 2003-07-05 2004-03-20 Hydraulic accumulator, especially piston-type accumulator Expired - Lifetime EP1642034B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10330516A DE10330516B3 (en) 2003-07-05 2003-07-05 Hydraulic accumulator, especially a piston-type accumulator, used in a spring system in vehicles comprises an accumulator housing having a free end terminated by a valve block provided with a ball valve
PCT/EP2004/002964 WO2005003570A1 (en) 2003-07-05 2004-03-20 Hydraulic accumulator, especially piston-type accumulator

Publications (2)

Publication Number Publication Date
EP1642034A1 EP1642034A1 (en) 2006-04-05
EP1642034B1 true EP1642034B1 (en) 2008-08-20

Family

ID=33016469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04722164A Expired - Lifetime EP1642034B1 (en) 2003-07-05 2004-03-20 Hydraulic accumulator, especially piston-type accumulator

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US (1) US20060277904A1 (en)
EP (1) EP1642034B1 (en)
JP (1) JP4456111B2 (en)
AT (1) ATE405746T1 (en)
DE (2) DE10330516B3 (en)
WO (1) WO2005003570A1 (en)

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US8056666B2 (en) * 2008-10-10 2011-11-15 GM Global Technology Operations LLC Hydraulic control for a vehicle powertrain
GB2470352B (en) * 2009-05-18 2015-07-01 Fawcett Christie Hydraulics Ltd Bladder accumulator with fluid port valve fixable in open position
DE102009034512A1 (en) * 2009-07-25 2011-01-27 Schaeffler Technologies Gmbh & Co. Kg Device for the variable adjustment of the timing of gas exchange valves of an internal combustion engine
CN102661301B (en) * 2012-05-02 2015-01-21 北京博源兴康科技有限公司 Fast oiling mechanism for hydraulic locking mechanical arm
CN103016428A (en) * 2013-01-06 2013-04-03 辽宁省电力有限公司铁岭供电公司 Air bleeder for accumulator
US9885373B1 (en) 2016-10-11 2018-02-06 Honeywell International Inc. Leak-free piston style accumulator
US11156236B2 (en) * 2016-12-09 2021-10-26 Dril-Quip, Inc. Ball valve with pressure absorbing accumulator
DE102016226304A1 (en) * 2016-12-29 2018-07-05 Robert Bosch Gmbh Hydraulic block for a hydraulic unit of a brake control of a hydraulic vehicle brake system

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US3901474A (en) * 1973-12-27 1975-08-26 Taimei Kinzoku Kogyo Kabushiki Rotary valve
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US6619325B2 (en) * 2001-12-04 2003-09-16 The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency Hydraulic hybrid accumulator shut-off valve

Also Published As

Publication number Publication date
WO2005003570A1 (en) 2005-01-13
JP4456111B2 (en) 2010-04-28
DE10330516B3 (en) 2004-10-21
DE502004007907D1 (en) 2008-10-02
EP1642034A1 (en) 2006-04-05
US20060277904A1 (en) 2006-12-14
ATE405746T1 (en) 2008-09-15
JP2007506914A (en) 2007-03-22

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