EP2385252A1 - Hydraulic assembly - Google Patents

Hydraulic assembly Download PDF

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Publication number
EP2385252A1
EP2385252A1 EP11173668A EP11173668A EP2385252A1 EP 2385252 A1 EP2385252 A1 EP 2385252A1 EP 11173668 A EP11173668 A EP 11173668A EP 11173668 A EP11173668 A EP 11173668A EP 2385252 A1 EP2385252 A1 EP 2385252A1
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EP
European Patent Office
Prior art keywords
reservoir
housing
hydraulic unit
unit according
oil
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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.)
Granted
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EP11173668A
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German (de)
French (fr)
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EP2385252B1 (en
EP2385252B2 (en
Inventor
Günter Andres
Ulf Sittig
Bernd Thelen
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Wagner Vermoegensverwaltungs GmbH and Co KG
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Wagner Vermoegensverwaltungs GmbH and Co KG
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Application filed by Wagner Vermoegensverwaltungs GmbH and Co KG filed Critical Wagner Vermoegensverwaltungs GmbH and Co KG
Priority to PL11173668T priority Critical patent/PL2385252T3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir

Definitions

  • the invention relates to a hydraulic unit with an oil-containing reservoir containing a motor and a pump driven by the motor.
  • a hydraulic unit has as a pressure generator to a pump, which sucks oil from a reservoir and feeds a consumer. From the consumer, a return line leads back to the reservoir.
  • hydraulic units containing the motor as a submersible motor, which is arranged in the reservoir and immersed in the hydraulic fluid. The heat generated in the engine is dissipated by the hydraulic oil.
  • the invention has for its object to provide a hydraulic unit, which is able to provide defined variable volume flows, without the risk of suction of air arises.
  • the hydraulic unit according to the present invention comprises an oil-containing reservoir and contains a multiple-piston pump of distributed individual pumps, wherein the reservoir is connected to an at least partially filled with oil auxiliary reservoir, which refills the reservoir in the event of oil removal by the multi-piston pump and thereby ensures complete immersion of the multiple piston pump.
  • a multi-piston pump is a positive displacement pump that delivers a continuous volume flow that can be varied by changing the speed. If the motor is a synchronous motor, it is possible, with a corresponding motor control, the size of the volume flow as a function of the load of the respective consumer change.
  • a multiple-piston pump in which the individual pumps are arranged distributed in the reservoir, involves the risk that when the oil level drops, the suction inlet of at least one single pump is temporarily no longer immersed, thereby sucking in air. To achieve a defined volume flow, this must be prevented.
  • the auxiliary reservoir ensures that, with a momentarily high removal of oil from the reservoir, a refilling of the reservoir takes place, so that a complete immersion of the multiple piston pump is ensured.
  • the hydraulic unit according to the invention is particularly suitable for those cases in which consumers are connected with different absorption capacity. If a consumer is a hydraulic power screwdriver for turning screws, the load to be overcome by the hydraulic pressure is normally high, so that the delivery rate or the volume flow is small. The situation is different when a connected consumer is, for example, a piston-cylinder unit whose large-volume cylinder contains a piston which is moved against a small load. This results in a fast piston movement with the result of a large volume flow, The large volume flow causes a change in the oil level in the reservoir, it may happen that the upper individual pumps are temporarily no longer immersed. Such a condition is prevented by the auxiliary reservoir.
  • the invention is advantageously applicable to a hydraulic power unit in which the reservoir has a cross-sectional shape in which the width of the reservoir decreases towards the upper end.
  • a cross-sectional shape results, for example, in a reservoir which has a substantially round cross-section.
  • Such a reservoir favors a space-saving housing of motor and pump. It leads to a hydraulic unit of small volume and low weight, so that the hydraulic unit as portable unit can be formed.
  • there is the danger that in the upwardly narrowing cross-section of the upper region, which has a small volume would drain quickly with strong oil extraction without the action of the auxiliary reservoir.
  • the auxiliary reservoir may be located on top of the reservoir, either as an additional container or as a cavity fixedly connected to the reservoir, but of greater width than the upper end of the reservoir.
  • the auxiliary reservoir is hermetically sealed above the oil level and a connecting line connects the auxiliary reservoir below the oil level with a ventilated additional tank.
  • the auxiliary reservoir and the additional tank form a communicating system.
  • the atmospheric pressure drives oil from the aerated additional tank into the auxiliary reservoir as soon as oil is removed from the reservoir from the auxiliary reservoir.
  • the additional tank increases the volume of the auxiliary reservoir, but on the other hand also spatially separated from the auxiliary reservoir.
  • the auxiliary reservoir is located above the reservoir, the auxiliary tank may be mounted below the reservoir. The additional tank can thus form a base for the housing of the reservoir.
  • the auxiliary reservoir can alternatively be used without an additional tank. In this case, a vent above the maximum oil level is required so that oil extraction from the reservoir is not affected.
  • the hydraulic unit has according to FIG. 1 a housing 10, which is a common motor housing of an electric motor.
  • the housing 10 has a cylindrical inner wall 11 and has on its outer side numerous longitudinal ribs 12, which form cooling fins.
  • the housing 10 forms a profile body made of an extruded profile. It is provided at one point of its circumference with an integrally formed longitudinal mounting plate 13 and on the diametrically opposite side is a mounting profile 14 for attachment of components to the housing.
  • the housing 10 contains the electric motor 15. This consists of a stator 16 and a rotor 17.
  • the motor is a permanent magnet-excited synchronous motor whose stator has a rotating field-generating stator winding 18.
  • the rotor 17 consists of the motor shaft 19 and attached thereto Permanent magnets 20.
  • the motor shaft 19 is mounted in bearings 21, 22 in the end walls (not shown) of the housing 10.
  • the stator winding 18 is enclosed with a hoop 25, which forms a closed ring and surrounds the coil winding.
  • spacers 26 are fixed, which protrude radially inward and keep the hoop 25 centered in the housing. In this way, the stator 16 is centered in the housing.
  • the spacers 26 are ledges extending longitudinally of the housing. At least three such ledges are provided, however, in the present embodiment 4.
  • the spacers 26 are shorter than the axial length of the space 27 so as to control the circulation of the hydraulic oil in the space 27 does not hinder.
  • the spacers 26 it is achieved that between the stator 16 and the inner surface 11 of the housing, the annular space 27 is present, which forms the main part of the volume of a reservoir 28.
  • the reservoir is limited by the housing 10.
  • the stator 16 and the rotor 17 are immersed in the hydraulic fluid.
  • the motor shaft 19 of the motor 15 has an eccentric ring 29 which drives a pump.
  • the pump is a multi-piston pump of a plurality of individual pumps, which are arranged in a star shape around the motor shaft 19 around, and whose pistons are driven by the eccentric ring 29 which is eccentrically fixed to the motor shaft.
  • Each of the individual pumps sucks in oil from the reservoir via a non-return valve and delivers it via another check valve to the pump outlet.
  • the multi-piston pump is a volumetric pump.
  • a fan 30 which has a housing 31 which projects radially beyond the housing 10.
  • a fan which has an air flow 32nd generated along the ribs 12.
  • the fan is connected to the motor shaft 19 and is driven by this. Because of the effective heat dissipation results in a good cooling. Due to the low heating of the hydraulic unit also increases the efficiency. Due to the omission of a separate motor housing, the hydraulic unit is of compact design and of low weight.
  • FIG. 2 is the entire hydraulic unit shown. It can be seen the housing 10 with the longitudinal ribs 12. At one end there is the fan 30, which drives an air flow along the outside of the housing. At the opposite end of the housing is the pump part 40 with the pressure port 41 and the return port 42 on the front side. Furthermore, there is a manometer 43 attached, which indicates the pressure.
  • auxiliary tank 45 which consists of a closed box provided with a nozzle 46 for aeration and filling of hydraulic oil.
  • an auxiliary reservoir 47 is mounted, which is connected to the additional tank 45 via a connecting line 48.
  • the motor controller 50 On the auxiliary reservoir is located in a housing, the motor controller 50. This is connected to (not shown) electrical lines to the electric motor 15.
  • the pressure at the pressure port 41 is determined by a (not shown) pressure sensor. This pressure is a measure of the load of the connected consumer.
  • the engine controller 50 controls the electric motor 15 to reduce the engine speed at higher pressure. As soon as the pressure decreases, the engine speed increases again. In this way it is achieved that the engine absorbed power remains substantially constant and is largely independent of the respective load state of the consumer.
  • FIG. 3 shows a schematic representation of the arranged in the space 27 multiple-piston pump 60, which consists of several star-shaped arranged individual pumps 61.
  • Each of the individual pumps 61 is a piston pump whose piston rod 62 is pressed against the circumference of the eccentric ring 29 by a spring (not shown).
  • the piston rods 62 are cyclically actuated by the eccentric ring 29.
  • Each of the individual pumps 61 has an inlet and an outlet (not shown).
  • the outlets are connected to each other and guided to the pressure port 41.
  • the inlets are openings through which oil from the reservoir 28 is sucked into the single pump.
  • the oil that is supplied to the load connected to the hydraulic unit is removed from the reservoir 28. Due to the round shape of the housing 10, a decrease in oil leads to a rapid drop in level. As a result, it could happen that the inlets of the upper individual pumps 61 are no longer submerged. This is avoided by the auxiliary reservoir 47.
  • the auxiliary reservoir 47 has, as out FIG. 3 It can be seen, a width which is greater than that of the upper end of the reservoir 28. It is filled up to a level 65 with oil. Above the level 65, the auxiliary reservoir 47 is hermetically sealed, so that an enclosed air poister 66 is formed. The lower end of the auxiliary reservoir 47 is connected via a passage 67 to the space 27. The auxiliary reservoir 47 thus provides unthrottled oil for refilling the reservoir 28.
  • the connecting line 48 connects the additional tank 45 with the auxiliary reservoir 47. It leads below the level 65 into the auxiliary reservoir.
  • the connecting line is designed as a dip tube that ends just above the ground. If a negative pressure is created in the auxiliary reservoir 47 by the multiple-piston pump 60, oil will pass from the additional tank 45 the connecting line 48 is pushed up. This is done by the atmospheric pressure, which enters through the nozzle 46 in the additional tank. In this way, a very large amount of oil for refilling the reservoir 28 is available.
  • auxiliary reservoir 47 it is also possible to operate the auxiliary reservoir 47 without the additional tank 45. In this case, aeration of the auxiliary reservoir is required.
  • FIG. 4 shows that at the auxiliary reservoir 47, a sight glass 68 is provided, through which the level can be inspected to festzusteflen a proper operation of the auxiliary reservoir.
  • a motor control 50 is mounted above the auxiliary reservoir 47. This consists of the required electrical components, which are not shown here.
  • the motor controller 50 has on its underside a plate 70 with numerous longitudinal cooling ribs 71.
  • the cooling fins 71 cover that part of the housing 10 which is released from the auxiliary reservoir 47.
  • the engine controller 50 is cantilevered over the auxiliary reservoir 47 via.
  • the cooling fins 71 are surrounded by an air guide housing 72 having a plurality of openings with fans 73 which blow cooling air into the air guide housing. Through openings 74, the cooling air exits.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Reciprocating Pumps (AREA)
  • Transplanting Machines (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Lubricants (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

A reservoir (28) links to an auxiliary reservoir that is partly filled with oil. The auxiliary reservoir refills the reservoir if oil drains through a multi-piston pump and, in this way, ensures that the multi-piston pump is completely immersed.

Description

Die Erfindung betrifft ein Hydraulikaggregat mit einem Öl enthaltenden Reservoir, das einen Motor und eine von dem Motor angetriebene Pumpe enthält.The invention relates to a hydraulic unit with an oil-containing reservoir containing a motor and a pump driven by the motor.

Ein Hydraulikaggregat weist als Druckerzeuger eine Pumpe auf, die Öl aus einem Reservoir ansaugt und einem Verbraucher zuführt. Von dem Verbraucher führt eine Rücklaufleitung zu dem Reservoir zurück. Bekannt sind Hydraulikaggregate, die den Motor als Tauchmotor enthalten, welcher in dem Reservoir angeordnet und in die Hydraulikflüssigkeit eingetaucht ist. Die im Motor erzeugte Wärme wird durch das Hydrauliköl abgeführt.A hydraulic unit has as a pressure generator to a pump, which sucks oil from a reservoir and feeds a consumer. From the consumer, a return line leads back to the reservoir. Are known hydraulic units containing the motor as a submersible motor, which is arranged in the reservoir and immersed in the hydraulic fluid. The heat generated in the engine is dissipated by the hydraulic oil.

Der Erfindung liegt die Aufgabe zugrunde, ein Hydraulikaggregat zu schaffen, das imstande ist, definierte variable Volumenströme zu liefern, ohne dass die Gefahr des Ansaugens von Luft entsteht.The invention has for its object to provide a hydraulic unit, which is able to provide defined variable volume flows, without the risk of suction of air arises.

Das Hydraulikaggregat nach der vorliegenden Erfindung weist ein Öl enthaltendes Reservoir auf und enthält eine Mehrfach-Kolbenpumpe aus verteilt angeordneten Einzelpumpen, wobei mit dem Reservoir ein wenigstens teilweise mit Öl gefülltes Hilfsreservoir verbunden ist, welches das Reservoir im Falle einer Ölabfuhr durch die Mehrfach-Kolbenpumpe nachfüllt und dadurch eine vollständige Tauchung der Mehrfach-Kolbenpumpe sicherstellt.The hydraulic unit according to the present invention comprises an oil-containing reservoir and contains a multiple-piston pump of distributed individual pumps, wherein the reservoir is connected to an at least partially filled with oil auxiliary reservoir, which refills the reservoir in the event of oil removal by the multi-piston pump and thereby ensures complete immersion of the multiple piston pump.

Eine Mehrfach-Kolbenpumpe ist eine Verdrängerpumpe, die einen kontinuierlichen Volumenstrom liefert, welcher durch Änderung der Drehzahl variiert werden kann. Wenn der Motor ein Synchronmotor ist, besteht die Möglichkeit, mit einer entsprechenden Motorsteuerung die Größe des Volumenstroms in Abhängigkeit von der Last des jeweiligen Verbrauchers zu verändern. Eine Mehrfach-Kolbenpumpe, bei der die Einzelpumpen verteilt in dem Reservoir angeordnet sind, birgt die Gefahr, dass bei einem Absinken des Ölstandes der Saugeinlass mindestens einer Einzelpumpe vorübergehend nicht mehr getaucht ist und dadurch Luft einsaugt. Zur Erzielung eines definierten Volumenstroms muss dies verhindert werden.A multi-piston pump is a positive displacement pump that delivers a continuous volume flow that can be varied by changing the speed. If the motor is a synchronous motor, it is possible, with a corresponding motor control, the size of the volume flow as a function of the load of the respective consumer change. A multiple-piston pump, in which the individual pumps are arranged distributed in the reservoir, involves the risk that when the oil level drops, the suction inlet of at least one single pump is temporarily no longer immersed, thereby sucking in air. To achieve a defined volume flow, this must be prevented.

Erfindungsgemäß sorgt das Hilfsreservoir dafür, dass bei einer momentan hohen Ölentnahme aus dem Reservoir eine Nachfüllung des Reservoirs erfolgt, so dass eine vollständige Tauchung der Mehrfach-Kolbenpumpe sichergestellt ist.According to the invention, the auxiliary reservoir ensures that, with a momentarily high removal of oil from the reservoir, a refilling of the reservoir takes place, so that a complete immersion of the multiple piston pump is ensured.

Das erfindungsgemäße Hydraulikaggregat eignet sich insbesondere für solche Fälle, bei denen Verbraucher mit unterschiedlichen Schluckvermögen angeschlossen werden, Wenn ein Verbraucher ein hydraulischer Kraftschrauber zum Drehen von Schrauben ist, ist die Last, die durch den Hydraulikdruck zu überwinden ist, normalerweise hoch, so dass die Förderrate bzw. der Volumenstrom klein ist. Anders verhält es sich, wenn ein angeschlossener Verbraucher beispielsweise eine Kolbenzylindereinheit ist, deren großvolumiger Zylinder einen Kolben enthält, der entgegen einer geringen Last bewegt wird. Hierbei ergibt sich eine schnelle Kolbenbewegung mit der Folge eines großen Volumenstroms, Der große Volumenstrom bewirkt eine Änderung des Ölpegels in dem Reservoir, wobei es vorkommen kann, dass die oberen Einzelpumpen zeitweilig nicht mehr eingetaucht sind. Ein solcher Zustand wird durch das Hilfsreservoir verhindert.The hydraulic unit according to the invention is particularly suitable for those cases in which consumers are connected with different absorption capacity. If a consumer is a hydraulic power screwdriver for turning screws, the load to be overcome by the hydraulic pressure is normally high, so that the delivery rate or the volume flow is small. The situation is different when a connected consumer is, for example, a piston-cylinder unit whose large-volume cylinder contains a piston which is moved against a small load. This results in a fast piston movement with the result of a large volume flow, The large volume flow causes a change in the oil level in the reservoir, it may happen that the upper individual pumps are temporarily no longer immersed. Such a condition is prevented by the auxiliary reservoir.

Die Erfindung ist mit Vorteil bei einem Hydraulikaggregat anwendbar, bei dem das Reservoir eine Querschnittsform aufweist, bei der die Breite des Reservoirs sich zum oberen Ende hin verkleinert. Eine solche Querschnittsform ergibt sich beispielsweise bei einem Reservoir, das einen im Wesentlichen runden Querschnitt hat. Ein derartiges Reservoir begünstigt eine raumsparende Unterbringung von Motor und Pumpe. Es führt zu einem Hydraulikaggregat von kleinem Volumen und geringem Gewicht, so dass das Hydraulikaggregat als tragbare Einheit ausgebildet werden kann. Andererseits besteht die Gefahr, dass bei dem sich nach oben verengenden Querschnitt der obere Bereich, der ein geringes Volumen hat, bei starker Ölentnahme ohne die Wirkung des Hilfsreservoirs schnell leer laufen würde.The invention is advantageously applicable to a hydraulic power unit in which the reservoir has a cross-sectional shape in which the width of the reservoir decreases towards the upper end. Such a cross-sectional shape results, for example, in a reservoir which has a substantially round cross-section. Such a reservoir favors a space-saving housing of motor and pump. It leads to a hydraulic unit of small volume and low weight, so that the hydraulic unit as portable unit can be formed. On the other hand, there is the danger that in the upwardly narrowing cross-section of the upper region, which has a small volume would drain quickly with strong oil extraction without the action of the auxiliary reservoir.

Das Hilfsreservoir kann oben auf dem Reservoir angeordnet sein, und zwar entweder als zusätzlicher Behälter oder als ein Hohlraum, der mit dem Reservoir fest verbunden ist, jedoch eine größere Breite hat als das obere Ende des Reservoirs.The auxiliary reservoir may be located on top of the reservoir, either as an additional container or as a cavity fixedly connected to the reservoir, but of greater width than the upper end of the reservoir.

Gemäß einer bevorzugten Ausgestaltung der Erfindung ist das Hilfsreservoir oberhalb des Ölpegels luftdicht abgeschlossen und eine Verbindungsleitung verbindet das Hilfsreservoir unterhalb des Ölpegels mit einem belüfteten Zusatztank. Hierbei bilden das Hilfsreservoir und der Zusatztank ein kommunizierendes System. Der Atmosphärendruck treibt aus dem belüfteten Zusatztank Öl in das Hilfsreservoir, sobald dem Hilfsreservoir vom Reservoir Öl entnommen wird. Der Zusatztank vergrößert das Volumen des Hilfsreservoirs, ist andererseits aber auch räumlich von dem Hilfsreservoir getrennt. Während das Hilfsreservoir oberhalb des Reservoirs angeordnet ist, kann der Zusatztank unter dem Reservoir montiert sein. Der Zusatztank kann also einen Sockel für das Gehäuse des Reservoirs bilden.According to a preferred embodiment of the invention, the auxiliary reservoir is hermetically sealed above the oil level and a connecting line connects the auxiliary reservoir below the oil level with a ventilated additional tank. Here, the auxiliary reservoir and the additional tank form a communicating system. The atmospheric pressure drives oil from the aerated additional tank into the auxiliary reservoir as soon as oil is removed from the reservoir from the auxiliary reservoir. The additional tank increases the volume of the auxiliary reservoir, but on the other hand also spatially separated from the auxiliary reservoir. While the auxiliary reservoir is located above the reservoir, the auxiliary tank may be mounted below the reservoir. The additional tank can thus form a base for the housing of the reservoir.

Es besteht auch die Möglichkeit, dass mehrere Zusatztanks unterschiedlicher Größe vorgesehen sind, die wahlweise an dem Gehäuse montierbar sind. Auf diese Weise kann der Benutzer die Größe des jeweiligen Zusatztanks auswählen.There is also the possibility that several additional tanks of different sizes are provided, which can be optionally mounted on the housing. In this way, the user can select the size of the respective additional tank.

Das Hilfsreservoir kann alternativ auch ohne einen Zusatztank benutzt werden. In diesem Fall ist eine Belüftungsöffnung oberhalb des maximalen Ölpegels erforderlich, damit die Ölentnahme aus dem Reservoir nicht beeinträchtigt wird.The auxiliary reservoir can alternatively be used without an additional tank. In this case, a vent above the maximum oil level is required so that oil extraction from the reservoir is not affected.

Verschiedene Ausführungsbeispiele der Erfindung sind nachfolgend beschrieben:

Ausführungsbeispiel 1:
Hydraulikaggregat mit einem Öl enthaltenden Reservoir, das einen Motor und eine von dem Motor angetriebene Mehrfach-Kolbenpumpe mit verteilt angeordneten Einzelpumpen enthält, wobei mit dem Reservoir ein wenigstens teilweise mit Öl gefülltes Hilfsreservoir verbunden ist, welches das Reservoir im Falle einer Ölabfuhr durch die Mehrfach-Kolbenpumpe nachfüllt und dadurch eine vollständige Tauchung der Mehrfach-Kolbenpumpe sicherstellt.
Ausführungsbeispiel 2:
Hydraulikaggregat nach Ausführungsbeispiel 1, wobei das Reservoir eine Querschnittsform aufweist, bei der die Breite des Reservoirs sich zum oberen Ende hin verkleinert.
Ausführungsbeispiel 3:
Hydraulikaggregat nach Ausführungsbeispiel 2, wobei das Reservoir einen im Wesentlichen runden Querschnitt hat.
Ausführungsbeispiel 4:
Hydraulikaggregat nach einem der Ausführungsbeispiele 1 bis 3, wobei das Hilfsreservoir oben auf dem Reservoir angeordnet ist.
Ausführungsbeispiel 5:
Hydraulikaggregat nach einem der Ausführungsbeispiele 1 bis 4, wobei das Hilfsreservoir oberhalb des Ölpegels luftdicht abgeschlossen ist und unterhalb des Ölpegels eine Verbindungsleitung das Hilfsreservoir mit einem belüfteten Zusatztank verbindet.
Ausführungsbeispiel 6:
Hydraulikaggregat nach einem der Ausführungsbeispiele 1 bis 4, wobei das Hilfsreservoir oberhalb des maximalen Ölpegels eine Belüftungsöffnung aufweist.
Ausführungsbeispiel 7:
Hydraulikaggregat nach einem der Ausführungsbeispiele 1 bis 6, wobei das Reservoir ein Gehäuse aufweist, welches zugleich das Gehäuse des Motors bildet, und der Rotor des Motors von dem Öl umspült ist.
Ausführungsbeispiel 8:
Hydraulikaggregat nach Ausführungsbeispiel 7, wobei das Gehäuse an seiner Außenseite Rippen aufweist, die in Achsrichtung des Motors verlaufen, und dass an einem Ende des Gehäuses ein Lüfter vorgesehen ist, der radial über das Gehäuse vorsteht und einen Kühlluftstrom entlang der Rippen erzeugt.
Ausführungsbeispiel 9:
Hydraulikaggregat nach Ausführungsbeispiel 7 oder 8, wobei das Gehäuse aus einem Profilkörper besteht, dessen Enden durch Stirnwände verschlossen sind.
Ausführungsbeispiel 10:
Hydraulikaggregat nach einem der Ausführungsbeispiele 7 bis 9, wobei das Gehäuse Mittel zur Befestigung eines Zusatztanks aufweist, der durch die Verbindungsleitung mit dem Hilfsreservoir verbindbar ist.
Ausführungsbeispiel 11:
Hydraulikaggregat nach Ausführungsbeispiel 10, wobei mehrere Zusatztanks unterschiedlicher Größe vorgesehen sind, die wahlweise an dem Gehäuse montierbar sind.
Various embodiments of the invention are described below:
Embodiment 1
Hydraulic unit comprising an oil-containing reservoir containing a motor and a motor-driven multi-piston pump with distributed individual pumps, wherein the reservoir is connected to an at least partially filled with oil auxiliary reservoir, which the reservoir in the event of oil removal by the multiple Refilling piston pump and thereby ensures a complete immersion of the multi-piston pump.
Embodiment 2:
Hydraulic unit according to embodiment 1, wherein the reservoir has a cross-sectional shape in which the width of the reservoir decreases towards the upper end.
Embodiment 3
Hydraulic unit according to embodiment 2, wherein the reservoir has a substantially round cross-section.
Embodiment 4
Hydraulic unit according to one of the embodiments 1 to 3, wherein the auxiliary reservoir is arranged on top of the reservoir.
Embodiment 5:
Hydraulic unit according to one of the embodiments 1 to 4, wherein the auxiliary reservoir is sealed airtight above the oil level and below the oil level, a connecting line connects the auxiliary reservoir with a ventilated additional tank.
Embodiment 6:
Hydraulic unit according to one of the embodiments 1 to 4, wherein the auxiliary reservoir above the maximum oil level has a ventilation opening.
Embodiment 7:
Hydraulic unit according to one of the embodiments 1 to 6, wherein the reservoir has a housing which at the same time forms the housing of the motor, and the rotor of the motor is surrounded by the oil.
Embodiment 8:
Hydraulic assembly according to embodiment 7, wherein the housing has on its outer side ribs extending in the axial direction of the motor, and that at one end of the housing, a fan is provided which projects radially beyond the housing and generates a cooling air flow along the ribs.
Embodiment 9:
Hydraulic unit according to embodiment 7 or 8, wherein the housing consists of a profile body whose ends are closed by end walls.
Embodiment 10:
Hydraulic unit according to one of the embodiments 7 to 9, wherein the housing has means for fixing an additional tank, which is connectable through the connecting line with the auxiliary reservoir.
Embodiment 11:
Hydraulic unit according to embodiment 10, wherein a plurality of additional tanks of different sizes are provided, which are optionally mounted on the housing.

Im Folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.In the following an embodiment of the invention will be explained in more detail with reference to the drawings.

Es zeigen:

Figur 1
eine schematische perspektivische Darstellung des Hydraulikaggregates in aufgeschnittenem Zustand,
Figur 2
eine perspektivische Ansicht des gesamten Hydraulikaggregats mit Hilfsreservoir und Zusatztank.,
Figur 3
einen Schnitt entlang der Linie III-IIIvon Figur 2, und
Figur 4
eine perspektivische Rückansicht des Hydraulikaggregats.
Show it:
FIG. 1
a schematic perspective view of the hydraulic unit in a cut state,
FIG. 2
a perspective view of the entire hydraulic unit with auxiliary reservoir and auxiliary tank.,
FIG. 3
a section along the line III-IIIvon FIG. 2 , and
FIG. 4
a rear perspective view of the hydraulic unit.

Das Hydraulikaggregat weist gemäß Figur 1 ein Gehäuse 10 auf, bei dem es sich um ein übliches Motorgehäuse eines Elektromotors handelt. Das Gehäuse 10 hat eine zylindrische Innenwand 11 und weist an seiner Außenseite zahlreiche längs verlaufende Rippen 12 auf, welche Kühlrippen bilden. Das Gehäuse 10 bildet einen Profilkörper aus einem Strangpressprofil. Es ist an einer Stelle seines Umfangs mit einer angeformten längslaufenden Montageplatte 13 versehen und an der diametral gegenüberliegenden Seite befindet sich ein Befestigungsprofil 14 zur Anbringung von Komponenten an dem Gehäuse.The hydraulic unit has according to FIG. 1 a housing 10, which is a common motor housing of an electric motor. The housing 10 has a cylindrical inner wall 11 and has on its outer side numerous longitudinal ribs 12, which form cooling fins. The housing 10 forms a profile body made of an extruded profile. It is provided at one point of its circumference with an integrally formed longitudinal mounting plate 13 and on the diametrically opposite side is a mounting profile 14 for attachment of components to the housing.

Das Gehäuse 10 enthält den Elektromotor 15. Dieser besteht aus einem Stator 16 und einem Rotor 17. Der Motor ist ein permanentmagnet-erregter Synchronmotor, dessen Stator eine drehfelderzeugende Statorwicklung 18 aufweist. Der Rotor 17 besteht aus der Motorwelle 19 und daran befestigten Permanentmagneten 20. Die Motorwelle 19 ist in Lagern 21, 22 in den (nicht dargestellten) Stirnwänden des Gehäuses 10 gelagert.The housing 10 contains the electric motor 15. This consists of a stator 16 and a rotor 17. The motor is a permanent magnet-excited synchronous motor whose stator has a rotating field-generating stator winding 18. The rotor 17 consists of the motor shaft 19 and attached thereto Permanent magnets 20. The motor shaft 19 is mounted in bearings 21, 22 in the end walls (not shown) of the housing 10.

Die Statorwicklung 18 ist mit einem Reif 25 eingefasst, der einen geschlossenen Ring bildet und die Spulenwicklung umgibt. An der zylindrischen Innenwand 11 des Gehäuses 10 sind Abstandhalter 26 befestigt, welche radial nach innen abstehen und den Reif 25 im Gehäuse zentriert halten. Auf diese Weise wird der Stator 16 im Gehäuse zentriert. Die Abstandhalter 26 sind Leisten, die in Längsrichtung des Gehäuses verlaufen, Mindestens sind drei derartiger Leisten vorgesehen, bei dem vorliegenden Ausführungsbeispiel jedoch 4. Die Abstandhalter 26 sind kürzer als die axiale Länge des Raumes 27, so dass sie die Zirkulation des Hydrauliköls in dem Raum 27 nicht behindern.The stator winding 18 is enclosed with a hoop 25, which forms a closed ring and surrounds the coil winding. On the cylindrical inner wall 11 of the housing 10 spacers 26 are fixed, which protrude radially inward and keep the hoop 25 centered in the housing. In this way, the stator 16 is centered in the housing. The spacers 26 are ledges extending longitudinally of the housing. At least three such ledges are provided, however, in the present embodiment 4. The spacers 26 are shorter than the axial length of the space 27 so as to control the circulation of the hydraulic oil in the space 27 does not hinder.

Durch die Abstandhalter 26 wird erreicht, dass zwischen dem Stator 16 und der Innenfläche 11 des Gehäuses der ringförmige Raum 27 vorhanden ist, der den Hauptteil des Volumens eines Reservoirs 28 bildet. Das Reservoir wird durch das Gehäuse 10 begrenzt. Der Stator 16 und der Rotor 17 befinden sich eingetaucht in der Hydraulikflüssigkeit.By the spacers 26 it is achieved that between the stator 16 and the inner surface 11 of the housing, the annular space 27 is present, which forms the main part of the volume of a reservoir 28. The reservoir is limited by the housing 10. The stator 16 and the rotor 17 are immersed in the hydraulic fluid.

Die Motorwelle 19 des Motors 15 weist einen Exzenterring 29 auf, der eine Pumpe antreibt. Die Pumpe ist eine Mehrfach-Kolbenpumpe aus mehreren Einzelpumpen, die sternförmig um die Motorwelle 19 herum angeordnet sind, und deren Kolben von dem Exzenterring 29, der exzentrisch mit der Motorwelle fest verbunden ist, angetrieben werden. Jede der Einzelpumpen saugt über ein Rückschlagventil Öl aus dem Reservoir an und fördert es über ein weiteres Rückschlagventil zum Pumpenauslass. Die Mehrfach-Kolbenpumpe ist eine volumetrische Pumpe.The motor shaft 19 of the motor 15 has an eccentric ring 29 which drives a pump. The pump is a multi-piston pump of a plurality of individual pumps, which are arranged in a star shape around the motor shaft 19 around, and whose pistons are driven by the eccentric ring 29 which is eccentrically fixed to the motor shaft. Each of the individual pumps sucks in oil from the reservoir via a non-return valve and delivers it via another check valve to the pump outlet. The multi-piston pump is a volumetric pump.

An dem der Pumpe gegenüberliegenden Ende des Gehäuses 10 befindet sich ein Lüfter 30, der ein Gehäuse 31 aufweist, welches radial über das Gehäuse 10 übersteht. In dem Gehäuse 31 rotiert ein Lüfterrad, welches einen Luftstrom 32 entlang der Rippen 12 erzeugt. Das Lüfterrad ist mit der Motorwelle 19 verbunden und wird durch diese angetrieben. Wegen der effektiven Wärmeabfuhr ergibt sich eine gute Kühlung. Infolge der geringen Erwärmung des Hydraulikaggregats erhöht sich auch der Wirkungsgrad. Wegen des Verzichts auf ein separates Motorgehäuse ist das Hydraulikaggregat von kompakter Bauform und von geringem Gewicht.At the opposite end of the pump housing 10 is a fan 30, which has a housing 31 which projects radially beyond the housing 10. In the housing 31 rotates a fan, which has an air flow 32nd generated along the ribs 12. The fan is connected to the motor shaft 19 and is driven by this. Because of the effective heat dissipation results in a good cooling. Due to the low heating of the hydraulic unit also increases the efficiency. Due to the omission of a separate motor housing, the hydraulic unit is of compact design and of low weight.

In Figur 2 ist das gesamte Hydraulikaggregat dargestellt. Man erkennt das Gehäuse 10 mit den längslaufenden Rippen 12. An dem einen Ende befindet sich der Lüfter 30, der einen Luftstrom an der Außenseite des Gehäuses entlang treibt. An dem gegenüberliegenden Ende des Gehäuses befindet sich der Pumpenteil 40 mit dem Druckanschluss 41 und dem Rücklaufanschluss 42 an der Stirnseite. Ferner ist dort ein Manometer 43 angebracht, weiches den Druck anzeigt.In FIG. 2 is the entire hydraulic unit shown. It can be seen the housing 10 with the longitudinal ribs 12. At one end there is the fan 30, which drives an air flow along the outside of the housing. At the opposite end of the housing is the pump part 40 with the pressure port 41 and the return port 42 on the front side. Furthermore, there is a manometer 43 attached, which indicates the pressure.

Unter dem Gehäuse 10 des Reservoirs ist ein Zusatztank 45 montiert, welcher aus einem geschlossenen Kasten besteht, der mit einem Stutzen 46 zur Belüftung und zum Einfüllen von Hydrauliköl versehen ist.Mounted under the housing 10 of the reservoir is an auxiliary tank 45 which consists of a closed box provided with a nozzle 46 for aeration and filling of hydraulic oil.

Auf der Oberseite des Gehäuses ist ein Hilfsreservoir 47 montiert, das mit dem Zusatztank 45 über eine Verbindungsleitung 48 verbunden ist. Auf dem Hilfsreservoir befindet sich in einem Gehäuse die Motorsteuerung 50. Diese ist mit (nicht dargestellten) elektrischen Leitungen mit dem Elektromotor 15 verbunden.On the upper side of the housing, an auxiliary reservoir 47 is mounted, which is connected to the additional tank 45 via a connecting line 48. On the auxiliary reservoir is located in a housing, the motor controller 50. This is connected to (not shown) electrical lines to the electric motor 15.

Der Druck am Druckanschluss 41 wird durch einen (nicht dargestellten) Drucksensor ermittelt. Dieser Druck ist ein Maß für die Last des angeschlossenen Verbrauchers. In Abhängigkeit von dem Druckwert steuert die Motorsteuerung 50 den Elektromotor 15 in der Weise, dass bei höherem Druck die Drehzahl des Motors verringert wird. Sobald sich der Druck verringert, erhöht sich wiederum die Motordrehzahl. Auf diese Weise wird erreicht, dass die vom Motor aufgenommene Leistung im Wesentlichen konstant bleibt und weitgehend unabhängig von dem jeweiligen Lastzustand des Verbrauchers ist.The pressure at the pressure port 41 is determined by a (not shown) pressure sensor. This pressure is a measure of the load of the connected consumer. In response to the pressure value, the engine controller 50 controls the electric motor 15 to reduce the engine speed at higher pressure. As soon as the pressure decreases, the engine speed increases again. In this way it is achieved that the engine absorbed power remains substantially constant and is largely independent of the respective load state of the consumer.

Figur 3 zeigt eine schematische Darstellung der in dem Raum 27 angeordneten Mehrfach-Kolbenpumpe 60, die aus mehreren sternförmig angeordneten Einzelpumpen 61 besteht. Jede der Einzelpumpen 61 ist eine Kolbenpumpe, deren Kolbenstange 62 von einer (nicht dargestellten) Feder gegen den Umfang des Exzenterringes 29 gedrückt wird. Die Kolbenstangen 62 werden von dem Exzenterring 29 zyklisch betätigt. Jede der Einzelpumpen 61 weist einen Einlass und einen Auslass (nicht dargestellt) auf. Die Auslässe sind miteinander verbunden und zu dem Druckanschluss 41 geführt. Die Einlässe sind Öffnungen, durch die Öl aus dem Reservoir 28 in die Einzelpumpe eingesaugt wird. Das Öl, das dem an das Hydraulikaggregat angeschlossenen Verbraucher zugeführt wird, wird dem Reservoir 28 entnommen. Wegen der Rundform des Gehäuses 10 führt eine Ölabnahme zu einem schnellen Pegelabfall. Dadurch könnte es vorkommen, dass die Einlässe der oberen Einzelpumpen 61 nicht mehr getaucht sind. Dies wird durch das Hilfsreservoir 47 vermieden. FIG. 3 shows a schematic representation of the arranged in the space 27 multiple-piston pump 60, which consists of several star-shaped arranged individual pumps 61. Each of the individual pumps 61 is a piston pump whose piston rod 62 is pressed against the circumference of the eccentric ring 29 by a spring (not shown). The piston rods 62 are cyclically actuated by the eccentric ring 29. Each of the individual pumps 61 has an inlet and an outlet (not shown). The outlets are connected to each other and guided to the pressure port 41. The inlets are openings through which oil from the reservoir 28 is sucked into the single pump. The oil that is supplied to the load connected to the hydraulic unit is removed from the reservoir 28. Due to the round shape of the housing 10, a decrease in oil leads to a rapid drop in level. As a result, it could happen that the inlets of the upper individual pumps 61 are no longer submerged. This is avoided by the auxiliary reservoir 47.

Das Hilfsreservoir 47 hat, wie aus Figur 3 hervorgeht, eine Breite, die größer ist als diejenige des oberen Endes des Reservoirs 28. Es ist bis zu einem Füllstand 65 mit Öl gefüllt. Oberhalb des Füllstandes 65 ist das Hilfsreservoir 47 luftdicht verschlossen, so dass sich ein eingeschlossenes Luftpoister 66 bildet. Das untere Ende des Hilfsreservoirs 47 ist über einen Durchlass 67 mit dem Raum 27 verbunden. Das Hilfsreservoir 47 stellt somit ungedrosselt Öl zum Nachfüllen des Reservoirs 28 zur Verfügung.The auxiliary reservoir 47 has, as out FIG. 3 It can be seen, a width which is greater than that of the upper end of the reservoir 28. It is filled up to a level 65 with oil. Above the level 65, the auxiliary reservoir 47 is hermetically sealed, so that an enclosed air poister 66 is formed. The lower end of the auxiliary reservoir 47 is connected via a passage 67 to the space 27. The auxiliary reservoir 47 thus provides unthrottled oil for refilling the reservoir 28.

Die Verbindungsleitung 48 verbindet den Zusatztank 45 mit dem Hilfsreservoir 47. Sie führt unterhalb des Füllstandes 65 in das Hilfsreservoir hinein. In dem Zusatztank 45 ist die Verbindungsleitung als Tauchrohr ausgeführt, das dicht über dem Boden endet. Wenn in dem Hilfsreservoir 47 durch die Mehrfach-Kolbenpumpe 60 ein Unterdruck entsteht, wird aus dem Zusatztank 45 Öl durch die Verbindungsleitung 48 hochgedrückt. Dies geschieht durch den Atmosphärendruck, der durch den Stutzen 46 in den Zusatztank eintritt. Auf diese Weise steht eine sehr große Ölmenge zum Nachfüllen des Reservoirs 28 zur Verfügung.The connecting line 48 connects the additional tank 45 with the auxiliary reservoir 47. It leads below the level 65 into the auxiliary reservoir. In the additional tank 45, the connecting line is designed as a dip tube that ends just above the ground. If a negative pressure is created in the auxiliary reservoir 47 by the multiple-piston pump 60, oil will pass from the additional tank 45 the connecting line 48 is pushed up. This is done by the atmospheric pressure, which enters through the nozzle 46 in the additional tank. In this way, a very large amount of oil for refilling the reservoir 28 is available.

Alternativ besteht auch die Möglichkeit, das Hilfsreservoir 47 ohne den Zusatztank 45 zu betreiben. In diesem Fall ist eine Belüftung des Hilfsreservoirs erforderlich.Alternatively, it is also possible to operate the auxiliary reservoir 47 without the additional tank 45. In this case, aeration of the auxiliary reservoir is required.

Figur 4 zeigt, dass an dem Hilfsreservoir 47 ein Schauglas 68 vorgesehen ist, durch das der Pegelstand inspiziert werden kann, um eine ordnungsgemäße Funktion des Hilfsreservoirs festzusteflen. FIG. 4 shows that at the auxiliary reservoir 47, a sight glass 68 is provided, through which the level can be inspected to festzusteflen a proper operation of the auxiliary reservoir.

Gemäß Figur 4 ist weiterhin über dem Hilfsreservoir 47 eine Motorsteuerung 50 montiert. Diese besteht aus den erforderlichen elektrischen Komponenten, die hier nicht dargestellt sind. Die Motorsteuerung 50 weist an ihrer Unterseite eine Platte 70 mit zahlreichen längslaufenden Kühlrippen 71 auf. Die Kühlrippen 71 überdecken denjenigen Teil des Gehäuses 10, der von dem Hilfsreservoir 47 freigelassen wird. Die Motorsteuerung 50 steht auslegerartig über das Hilfsreservoir 47 über. Die Kühlrippen 71 sind von einem Luftführungsgehäuse 72 umgeben, das mehrere Öffnungen mit Lüftern 73 aufweist, welche Kühlluft in das Luftführungsgehäuse einblasen. Durch Öffnungen 74 tritt die Kühlluft aus.According to FIG. 4 Furthermore, a motor control 50 is mounted above the auxiliary reservoir 47. This consists of the required electrical components, which are not shown here. The motor controller 50 has on its underside a plate 70 with numerous longitudinal cooling ribs 71. The cooling fins 71 cover that part of the housing 10 which is released from the auxiliary reservoir 47. The engine controller 50 is cantilevered over the auxiliary reservoir 47 via. The cooling fins 71 are surrounded by an air guide housing 72 having a plurality of openings with fans 73 which blow cooling air into the air guide housing. Through openings 74, the cooling air exits.

Claims (11)

Hydraulikaggregat mit einem Öl enthaltenden Reservoir (28), das einen Motor (15) und eine von dem Motor angetriebene Mehrfach-Kolbenpumpe (60) mit verteilt angeordneten Einzelpumpen (61) enthält, wobei mit dem Reservoir (28) ein wenigstens teilweise mit Öl gefülltes Hilfsreservoir (47) verbunden ist, welches das Reservoir im Falle einer Ölabfuhr durch die Mehrfach-Kolbenpumpe (60) nachfüllt und dadurch eine vollständige Tauchung der Mehrfach-Kolbenpumpe (60) sicherstellt.Hydraulic assembly comprising an oil reservoir (28) containing a motor (15) and a motor driven multi-piston pump (60) with distributed individual pumps (61), with the reservoir (28) at least partially filled with oil Auxiliary reservoir (47) is connected, which replenishes the reservoir in the event of oil removal by the multi-piston pump (60), thereby ensuring a complete immersion of the multi-piston pump (60). Hydraulikaggregat nach Anspruch 1, wobei das Reservoir (28) eine Querschnittsform aufweist, bei der die Breite des Reservoirs sich zum oberen Ende hin verkleinert.Hydraulic unit according to claim 1, wherein the reservoir (28) has a cross-sectional shape in which the width of the reservoir decreases towards the upper end. Hydraulikaggregat nach Anspruch 2, wobei das Reservoir (28) einen im Wesentlichen runden Querschnitt hat.Hydraulic unit according to claim 2, wherein the reservoir (28) has a substantially circular cross-section. Hydraulikaggregat nach einem der Ansprüche 1 bis 3, wobei das Hilfsreservoir (47) oben auf dem Reservoir (28) angeordnet ist.Hydraulic unit according to one of claims 1 to 3, wherein the auxiliary reservoir (47) is arranged on top of the reservoir (28). Hydraulikaggregat nach einem der Ansprüche 1 bis 4, wobei das Hilfsreservoir (47) oberhalb des Ölpegels (65) luftdicht abgeschlossen ist und unterhalb des Ölpegels (65) eine Verbindungsleitung (48) das Hilfsreservoir mit einem belüfteten Zusatztank (45) verbindet.Hydraulic unit according to one of claims 1 to 4, wherein the auxiliary reservoir (47) above the oil level (65) is hermetically sealed and below the oil level (65) connects a connecting line (48) the auxiliary reservoir with a vented additional tank (45). Hydraulikaggregat nach einem der Ansprüche 1 bis 4, wobei das Hilfsreservoir (47) oberhalb des maximalen Ölpegels eine Belüftungsöffnung aufweist.Hydraulic unit according to one of claims 1 to 4, wherein the auxiliary reservoir (47) above the maximum oil level has a ventilation opening. Hydraulikaggregat nach einem der Ansprüche 1 bis 6, wobei das Reservoir (28) ein Gehäuse (10) aufweist, welches zugleich das Gehäuse des Motors (15) bildet, und der Rotor (17) des Motors von dem Öl umspült ist.Hydraulic unit according to one of claims 1 to 6, wherein the reservoir (28) has a housing (10), which at the same time forms the housing of the motor (15), and the rotor (17) of the engine is surrounded by the oil. Hydraulikaggregat nach Anspruch 7, dadurch gekennzeichnet, dass das Gehäuse (10) an seiner Außenseite Rippen (12) aufweist, die in Achsrichtung des Motors (15) verlaufen, und dass an einem Ende des Gehäuses ein Lüfter (30) vorgesehen ist, der radial über das Gehäuse vorsteht und einen Kühlluftstrom (32) entlang der Rippen (12) erzeugt.Hydraulic unit according to claim 7, characterized in that the housing (10) on its outer side ribs (12) which extend in the axial direction of the motor (15), and that at one end of the housing, a fan (30) is provided which radially projects beyond the housing and generates a cooling air flow (32) along the ribs (12). Hydraulikaggregat nach Anspruch 7 oder 8, wobei das Gehäuse (10) aus einem Profilkörper besteht, dessen Enden durch Stirnwände verschlossen sind.Hydraulic unit according to claim 7 or 8, wherein the housing (10) consists of a profile body whose ends are closed by end walls. Hydraulikaggregat nach einem der Ansprüche 7 bis 9, wobei das Gehäuse (10) Mittel zur Befestigung eines Zusatztanks (45) aufweist, der durch die Verbindungsleitung (48) mit dem Hilfsreservoir (47) verbindbar ist.Hydraulic unit according to one of claims 7 to 9, wherein the housing (10) has means for fastening an additional tank (45), which is connectable by the connecting line (48) with the auxiliary reservoir (47). Hydraulikaggregat nach Anspruch 10, wobei mehrere Zusatztanks (45) unterschiedlicher Größe vorgesehen sind, die wahlweise an dem Gehäuse (10) montierbar sind.Hydraulic unit according to claim 10, wherein a plurality of additional tanks (45) of different sizes are provided, which are selectively mountable to the housing (10).
EP11173668.2A 2005-04-01 2006-03-23 Hydraulic assembly Active EP2385252B2 (en)

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EP1864019B1 (en) 2011-08-03
EP1864019A1 (en) 2007-12-12
PL2385252T3 (en) 2014-03-31
DE202005005165U1 (en) 2006-08-17
DK1864019T3 (en) 2011-11-07
US8220380B2 (en) 2012-07-17
ATE519034T1 (en) 2011-08-15

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