EP1650442B1 - Control device - Google Patents

Control device Download PDF

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Publication number
EP1650442B1
EP1650442B1 EP05022317A EP05022317A EP1650442B1 EP 1650442 B1 EP1650442 B1 EP 1650442B1 EP 05022317 A EP05022317 A EP 05022317A EP 05022317 A EP05022317 A EP 05022317A EP 1650442 B1 EP1650442 B1 EP 1650442B1
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EP
European Patent Office
Prior art keywords
valve
control device
tools
operating
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05022317A
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German (de)
French (fr)
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EP1650442A1 (en
Inventor
Wolfgang Bertleff
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Lukas Hydraulik GmbH
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Lukas Hydraulik GmbH
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Publication of EP1650442A1 publication Critical patent/EP1650442A1/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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • 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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/001—Double valve requiring the use of both hands simultaneously
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7128—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members

Definitions

  • the invention relates to a control device according to the preamble of patent claim 1.
  • Such control devices are used in particular in rescue technology. They serve by means of a pump, for. As a portable motorized pump to operate several tools needed for the rescue operation. For rescue missions namely often have to use the tools such. As lifting cylinder, scissors, spreader or rescue cylinder especially loads (often several at the same time) are lifted. These are always tools with cylinders without a control attached to the tool. For this reason, it comes z. B. in daily use quite often, that in addition to a lifting cylinder, another lifting cylinder is operated by one and the same pump.
  • the object of the present invention is to provide a novel control device with which the aforementioned problem is avoided. At the same time the controller should have a simple, inexpensive to implement construction.
  • the present object is achieved with the control device according to claim 1.
  • the control device including the so-called deadman function, can be operated by the operator with two hands, i. H. especially easy to use. However, however, the controller ensures increased reliability.
  • the change-over valve and / or control valve can be driven manually or by means of a drive and an operating element (for example push-button) to be operated by the operator.
  • a position is provided in which the resource located in the respective resource line can not, at least but not in significant quantities, flow to the changeover valve. For example, this is made possible by the fact that in the basic position of the control valve, each operating medium line is connected against a check valve. The operating medium can thus not flow away, as a result of which a "load-holding state" is established.
  • control valve is designed such that intermediate positions on the manual actuation of the control valve in the manner of a joystick by the operator can be fixed, such that this can vary the division ratios of the supply of resources to the individual tools accordingly.
  • control valve in that a so-called proportional valve is used as the control valve.
  • the output side of the control valve is expediently connected directly via operating medium lines with the tools, so that the control of the individual tools takes place directly from the control valve.
  • control valve also has means for an automatic return of the control valve to a basic position when the control valve is released by the operator. This is particularly useful when the current operating state of the respective tool should be "frozen” to a risk of failure of the operator due to subsequent tool movements such. As a lowering of the lifting cylinder to prevent widening of a spreader or the like.
  • control element is provided on the control valve as a control lever.
  • the respective return line from the respective tool runs bypassing the control valve in a common collection channel directly to the changeover valve and from there depending on the switching position back into the reservoir of the pump.
  • the basic position of the changeover valve is expediently a position in which a non-pressurized circulation takes place via the pump. In this basic position, no pressure build-up in the area of the tools is possible, although the pump continues to run.
  • control valve and / or changeover valve in the respective basic position is advantageously carried out by means of an elastic bias, for example by using a spring arrangement.
  • an operating element in particular in the form of a preselection lever, is also provided in the case of the changeover valve.
  • control device is provided as a self-contained, manageable unit, which is in each case connected in use with the pump and the tools via appropriate operating lines and return lines.
  • a pressure relief valve which connects the pump to the reservoir. This pressure relief valve serves to deliver the resulting in the basic position of the changeover valve pressure to the reservoir of the pump.
  • control device is in particular for a max.
  • Operating pressure from 300 bar, preferably up to 500 bar, preferably from 330 bar to 430 bar, provided.
  • oil is provided as operating fluid.
  • the tools are in particular those of rescue and rescue technology such.
  • Reference numeral 1 denotes the portable according to the invention, d. H. independently manageable control device whose components are arranged within the dot-dashed area.
  • the control device 1 is connected to a pump 4 as well as to a plurality of tools (in the case of the drawing figure, for example, two hydraulically operated tools). These are z. Example, to a first lifting cylinder 2 and a second lifting cylinder 3, which are to be operated by the single pump 4 simultaneously. In this specific case of an embodiment of the invention, the two lifting cylinders 2, 3 work in the same direction, d. H. in the same direction.
  • the pump 4 is a motor-driven pump or a hand pump.
  • the operating pressure is z. B. at about 350 bar.
  • the control device 1 serves to allow the operator to coordinate the operation of the two tools as needed using a single pump 4.
  • control device 1 comprises a switching valve 5 with which three switching positions can be realized in the example of the drawing figure, namely crossover (retraction of the tools to the initial position), basic position (no operation of the tools) and parallel position (operation of the tools) Tools).
  • crossover retract of the tools to the initial position
  • basic position no operation of the tools
  • parallel position operation of the tools
  • the pressure relief valve 17 provides relief in possibly building up overpressure.
  • the switching valve 5 is designed so that it automatically passes in a release of the selector lever 6 by the operator due to a spring assembly 14 in the center figure shown in the single figure, in which only a non-pressurized circulation of the resource. If the operator thus releases the preselector lever 6 of the changeover valve 5, no return of the operating medium from the changeover valve to the tools occurs due to the return of the changeover valve 5 to the basic position.
  • a resilient bias may be provided, for example in the form of the aforementioned spring assembly 14.
  • the control unit 1 further comprises an additional control module, in particular a control valve 7, which is provided between the switching valve 5 and the tools.
  • the pressure medium line between the changeover valve 5 and the individual tools thus runs via the control valve. 7
  • the control valve 7 is manually operated in its position, expediently also by an operating element 8 z. B. a control lever.
  • the control valve 7 also has an automatic reset function upon release of the operating lever by the operator in a basic position (in drawing figure central position), in which the two Operating medium lines 10, 11 of the tools are each switched to a check valve 20, This can - since resources do not flow to the changeover valve 5 - set a lasthaltender state of the tools. There is thus no change in the respective instantaneous position of the first lifting cylinder 2 or second lifting cylinder 3.
  • a resilient bias for example in the form of a spring assembly 15.
  • the control valve 7 is designed as a so-called proportional valve, with the result that the operator over the control element 8 with one hand share the information about the control valve to be split volume flows from the pump 4 to the individual tools and thus individually control the individual tools.
  • the operator can operate the control valve 7 in the manner of a joystick control with one hand, wherein it determines the function of the switching valve 5 with the other hand.
  • a conventional changeover valve can be used, which can be used without design changes.
  • the control valve 7 and / or switching valve 5 can be driven manually or by motor.
  • a pump can also be a pump with several independent resource circuits such. B. a so-called. Zweistrompumpe be used. In the latter case, two lifting cylinders and a rescue scissors could be operated in parallel with the control unit according to the invention.
  • the present invention ensures the simultaneous operation of multiple tools using a pump with a high operator comfort, a safe "deadman function" and a simple, low-cost realizable design.
  • the invention therefore represents a very special contribution in the relevant field of the prior art.

Abstract

Lifting cylinders (2,3) connect the control device (1) to at least two tools. When an operator lets go of a changeover valve (5), which is operable by hand, then the changeover valve is automatically brought into a basic position in which no pressure build-up in the region of the tools is possible. A control valve (7) is provided between the changeover valve and the tools, and can also be operated by hand by the operator.

Description

Die Erfindung betrifft eine Steuereinrichtung nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a control device according to the preamble of patent claim 1.

Derartige Steuereinrichtungen werden insbesondere in der Rettungstechnik verwendet. Sie dienen dazu, mittels einer Pumpe, z. B. einer tragbaren motorischen Pumpe, mehrere für den Rettungseinsatz benötigte Werkzeuge zu betätigen. Bei Rettungseinsätzen müssen nämlich häufig zum Einsatz der Werkzeuge wie z. B. Hebezylinder, Schere, Spreizer oder Rettungszylinder vor allem auch Lasten (oftmals mehrere gleichzeitig) gehoben werden. Es handelt sich hierbei stets um Werkzeuge mit Zylinder ohne eine am Werkzeug angebrachte Steuerung. Aus diesem Grund kommt es z. B. im täglichen Einsatz durchaus häufig vor, dass neben einem Hebezylinder ein weiterer Hebezylinder von ein und derselben Pumpe betrieben wird.Such control devices are used in particular in rescue technology. They serve by means of a pump, for. As a portable motorized pump to operate several tools needed for the rescue operation. For rescue missions namely often have to use the tools such. As lifting cylinder, scissors, spreader or rescue cylinder especially loads (often several at the same time) are lifted. These are always tools with cylinders without a control attached to the tool. For this reason, it comes z. B. in daily use quite often, that in addition to a lifting cylinder, another lifting cylinder is operated by one and the same pump.

Aus der Broschüre LUKAS MSM-2D Mobil-Steuer-Modul ist eine Steuerung gemäß dem Oberbegriff des Anspruchs 1 bekannt. Hierbei rastet das mittels eines Hebels manuell betätigbare Umschaltventil in die jeweilige Schaltposition ein und bleibt in Betrieb solange, bis die Bedienungsperson das Umschaltventil in die Passivstellung zurücksetzt. Fällt die Bedienungsperson aus, laufen daher die Funktionen der Werkzeuge weiter, wodurch eine Gefahrensituation entstehen kann.From the brochure LUKAS MSM-2D mobile control module, a control according to the preamble of claim 1 is known. Here, the manually actuated by means of a lever switching valve engages in the respective switching position and remains in operation until the operator resets the switching valve in the passive position. If the operator fails, the functions of the tools continue to run, which can result in a dangerous situation.

Weiterhin ist auch GB 2 340 486 eine Steuereinrichtung gemäß dem Oberbegriff des Anspruchs 1 bekannt.Continue is also GB 2 340 486 a control device according to the preamble of claim 1 known.

Die Aufgabe der vorliegenden Erfindung besteht darin, eine neuartige Steuereinrichtung zur Verfügung zu stellen, mit der das vorerwähnte Problem vermieden wird. Gleichzeitig soll die Steuereinrichtung einen einfachen, kostengünstig umzusetzenden Aufbau besitzen.The object of the present invention is to provide a novel control device with which the aforementioned problem is avoided. At the same time the controller should have a simple, inexpensive to implement construction.

Die vorliegende Aufgabe wird mit der Steuereinrichtung gemäß Anspruchs 1gelöst.The present object is achieved with the control device according to claim 1.

Fällt die Bedienungsperson aus und lässt das von Hand zu bedienende Umschaltventil los, wird durch die sich selbsttätig einstellende Grundstellung des Umschaltventils ein Druck im Werkzeug (der durch vorangegangene Betätigung schon aufgebaut sein kann) gehalten (Lasthaltefunktion), gleichzeitig aber eine weitere Bewegung unterbunden. Es tritt somit eine unmittelbar erfolgende Unterbrechung der Bewegung der Werkzeuge ein. Die Steuereinrichtung ist inklusive sogenannter Totmannfunktion mit zwei Händen von der Bedienungsperson bedienbar, d. h. besonders bedienungsfreundlich. Gleichwohl aber gewährleistet die Steuereinrichtung eine erhöhte Betriebssicherheit. Das Umschaltventil und/oder Steuerventil kann manuell oder mittels eines Antriebs und eines von der Bedienungsperson zu bedienenden Bedienelements (z. B. Taster) angetrieben werden.If the operator fails and releases the manually operated change-over valve, a pressure in the tool (which can already be established by previous actuation) is maintained by the self-adjusting basic position of the changeover valve (load holding function), but at the same time a further movement is prevented. It thus occurs an immediate interruption of the movement of the tools. The control device, including the so-called deadman function, can be operated by the operator with two hands, i. H. especially easy to use. However, however, the controller ensures increased reliability. The change-over valve and / or control valve can be driven manually or by means of a drive and an operating element (for example push-button) to be operated by the operator.

Auch bei letzterer Ausführung wirkt sich die Idee vorteilhaft aus, da z. B. bei Stromausfall des Systems sich eine Totmannfunktion ergibt.Even with the latter embodiment, the idea has an advantageous effect, since z. B. in case of power failure of the system results in a deadman function.

Als Grundstellung des Steuerventils ist eine Stellung vorgesehen, bei der das in der jeweiligen Betriebsmittelleitung befindliche Betriebsmittel nicht, zumindest aber nicht in wesentlichen Mengen, zum Umschaltventil abfließen kann. Beispielsweise wird dies dadurch ermöglicht, dass in der Grundstellung des Steuerventils jede Betriebsmittelleitung gegen ein Rückschlagventil geschaltet ist. Das Betriebsmittel kann somit nicht abfließen, wodurch sich ein "lasthaltender Zustand" einstellt.As a basic position of the control valve, a position is provided in which the resource located in the respective resource line can not, at least but not in significant quantities, flow to the changeover valve. For example, this is made possible by the fact that in the basic position of the control valve, each operating medium line is connected against a check valve. The operating medium can thus not flow away, as a result of which a "load-holding state" is established.

Erfindungsgemäß ist das Steuerventil derart konzipiert, dass Zwischenstellungen über die manuelle Betätigung des Steuerventils nach Art eines Joysticks von der Bedienungsperson festlegbar sind, derart, dass sich hierdurch die Teilungsverhältnisse der Zuführung von Betriebsmittel zu den einzelnen Werkzeugen entsprechend variieren lässt.According to the invention, the control valve is designed such that intermediate positions on the manual actuation of the control valve in the manner of a joystick by the operator can be fixed, such that this can vary the division ratios of the supply of resources to the individual tools accordingly.

Erfindungsgemäß sind bei dem Steuerventil unbegrenzte Zwischenstellungen möglich dadurch, dass als Steuerventil ein sogenanntes Proportionalventil verwendet wird.According to the invention, unlimited intermediate positions are possible in the control valve in that a so-called proportional valve is used as the control valve.

Die Ausgangsseite des Steuerventils ist zweckmäßigerweise unmittelbar über Betriebsmittelleitungen mit den Werkzeugen verbunden, so dass unmittelbar von dem Steuerventil aus die Ansteuerung der einzelnen Werkzeuge erfolgt.The output side of the control valve is expediently connected directly via operating medium lines with the tools, so that the control of the individual tools takes place directly from the control valve.

Zweckmäßigerweise weist auch das Steuerventil Mittel für eine selbsttätige Rückstellung des Steuerventils in eine Grundstellung bei einem Loslassen des Steuerventils durch die Bedienungsperson auf. Dies ist insbesondere dann zweckmäßig, wenn der augenblickliche Betriebszustand des jeweiligen Werkzeuges "eingefroren" werden soll, um bei einem Ausfall der Bedienungsperson eine Gefährdung aufgrund von nachfolgenden Werkzeugbewegungen wie z. B. ein Absenken des Hebezylinders, ein Aufweiten eines Spreizers oder dergleichen zu verhindern.Expediently, the control valve also has means for an automatic return of the control valve to a basic position when the control valve is released by the operator. This is particularly useful when the current operating state of the respective tool should be "frozen" to a risk of failure of the operator due to subsequent tool movements such. As a lowering of the lifting cylinder to prevent widening of a spreader or the like.

Zweckmäßigerweise ist das Bedienelement am Steuerventil als Bedienhebel vorgesehen.Conveniently, the control element is provided on the control valve as a control lever.

Die jeweilige Rückleitung von dem betreffenden Werkzeug verläuft unter Umgehung des Steuerventils in einem gemeinsamen Sammelkanal unmittelbar zum Umschaltventil und von dort abhängig von der Schaltstellung zurück in das Reservoir der Pumpe.The respective return line from the respective tool runs bypassing the control valve in a common collection channel directly to the changeover valve and from there depending on the switching position back into the reservoir of the pump.

Bei der Grundstellung des Umschaltventils handelt es sich zweckmäßigerweise um eine Stellung, bei der ein druckloser Umlauf über die Pumpe erfolgt. In dieser Grundstellung wird kein Druckaufbau im Bereich der Werkzeuge möglich, obwohl die Pumpe weiterläuft.The basic position of the changeover valve is expediently a position in which a non-pressurized circulation takes place via the pump. In this basic position, no pressure build-up in the area of the tools is possible, although the pump continues to run.

Die Rückstellung des Steuerventils und/oder Umschaltventils in die jeweilige Grundstellung erfolgt zweckmäßigerweise mittels einer elastischen Vorspannung beispielsweise durch Verwendung einer Federanordnung.The provision of the control valve and / or changeover valve in the respective basic position is advantageously carried out by means of an elastic bias, for example by using a spring arrangement.

Wie bei dem Steuerventil ist auch bei dem Umschaltventil ein Bedienelement insbesondere in Form eines Vorwahlhebels vorgesehen.As with the control valve, an operating element, in particular in the form of a preselection lever, is also provided in the case of the changeover valve.

Die erfindungsgemäße Steuereinrichtung ist als selbstständige, handhabbare Einheit vorgesehen, die jeweils im Einsatz mit der Pumpe und den Werkzeugen über entsprechende Betriebsmittelleitungen und Rückleitungen verbunden wird.The control device according to the invention is provided as a self-contained, manageable unit, which is in each case connected in use with the pump and the tools via appropriate operating lines and return lines.

Zweckmäßigerweise befindet sich im Zulauf zwischen der Pumpe und dem Umschaltventil ein Überdruckventil, welches die Pumpe mit dem Reservoir verbindet. Dieses Überdruckventil dient dazu, den sich bei der Grundstellung des Umschaltventils ergebenden Überdruck an das Reservoir der Pumpe abzugeben.Conveniently located in the inlet between the pump and the switching valve, a pressure relief valve, which connects the pump to the reservoir. This pressure relief valve serves to deliver the resulting in the basic position of the changeover valve pressure to the reservoir of the pump.

Erfindungsgemäß ist die Steuereinrichtung insbesondere für einen max. Betriebsdruck ab 300 bar, vorzugsweise bis 500 bar, vorzugsweise ab 330 bar bis 430 bar, vorgesehen.According to the invention, the control device is in particular for a max. Operating pressure from 300 bar, preferably up to 500 bar, preferably from 330 bar to 430 bar, provided.

Zweckmäßigerweise ist als Betriebsmittelhydraulik Öl vorgesehen.Expediently, oil is provided as operating fluid.

Bei den Werkzeugen handelt es sich insbesondere um solche der Rettungs- und Bergetechnik wie z. B. Hebezylinder sowie sonstige Werkzeuge, die keine eigene Steuereinrichtung am Gerät haben.The tools are in particular those of rescue and rescue technology such. B. lifting cylinder and other tools that have no own control device on the device.

Die vorliegende Erfindung wird anhand eines vereinfachten Prinzipschaubilds nachstehend näher erläutert.The present invention is explained in more detail below with reference to a simplified schematic diagram.

Bezugsziffer 1 kennzeichnet die erfindungsgemäße tragbare, d. h. selbständig handhabbare Steuereinrichtung, deren Komponenten innerhalb der strichpunktierten Fläche angeordnet sind. Die Steuereinrichtung 1 wird mit einer Pumpe 4 sowie mit mehreren, im Falle der Zeichnungsfigur zwei (z. B. hydraulisch betriebenen) Werkzeugen verbunden. Es handelt sich hierbei z. B. um einen ersten Hebezylinder 2 und einen zweiten Hebezylinder 3, die von der einzigen Pumpe 4 gleichzeitig betrieben werden sollen. In diesem konkreten Fall einer Ausgestaltung der Erfindung arbeiten die beiden Hebezylinder 2, 3 gleichsinnig, d. h. in der gleichen Richtung. Bei der Pumpe 4 handelt es sich um eine motorisch angetriebene Pumpe oder um eine Handpumpe. Der Betriebsdruck liegt z. B. bei etwa 350 bar.Reference numeral 1 denotes the portable according to the invention, d. H. independently manageable control device whose components are arranged within the dot-dashed area. The control device 1 is connected to a pump 4 as well as to a plurality of tools (in the case of the drawing figure, for example, two hydraulically operated tools). These are z. Example, to a first lifting cylinder 2 and a second lifting cylinder 3, which are to be operated by the single pump 4 simultaneously. In this specific case of an embodiment of the invention, the two lifting cylinders 2, 3 work in the same direction, d. H. in the same direction. The pump 4 is a motor-driven pump or a hand pump. The operating pressure is z. B. at about 350 bar.

Die Steuereinrichtung 1 dient dazu, dass die Bedienungsperson den Betrieb der beiden Werkzeuge unter Verwendung einer einzelnen Pumpe 4 bedarfsweise koordinieren kann.The control device 1 serves to allow the operator to coordinate the operation of the two tools as needed using a single pump 4.

Die Steuereinrichtung 1 umfasst hierzu ein Umschaltventil 5, mit dem im Beispiel der Zeichnungsfigur drei Schaltstellungen realisierbar sind, nämlich Überkreuzstellung (Zurückfahren der Werkzeuge in die Ausgangsstellung), Grundstellung (kein Betrieb der Werkzeuge) sowie Parallelstellung (Betrieb der Werkzeuge). Im Zustand der Grundstellung wird das von der Pumpe 4 beförderte Betriebsmittel (insbesondere Hydrauliköl) unmittelbar in die Rücklaufleitung zum Reservoir 18 zurückgefördert. Das Überdruckventil 17 sorgt für Entlastung bei sich ggf. aufbauendem Überdruck.For this purpose, the control device 1 comprises a switching valve 5 with which three switching positions can be realized in the example of the drawing figure, namely crossover (retraction of the tools to the initial position), basic position (no operation of the tools) and parallel position (operation of the tools) Tools). In the state of the basic position, the pumped by the pump 4 operating means (in particular hydraulic oil) is fed back directly into the return line to the reservoir 18. The pressure relief valve 17 provides relief in possibly building up overpressure.

Die Wahl der jeweiligen Umschaltstellung des Umschaltventils 5 erfolgt über einen Vorwahlhebel 6, den die Bedienungsperson manuell betätigen kann. Das Umschaltventil 5 ist derart konzipiert, dass es bei einem Loslassen des Vorwahlhebels 6 durch die Bedienungsperson bedingt durch eine Federanordnung 14 selbsttätig in die in der einzigen Figur mittig dargestellte Grundstellung übergeht, bei der lediglich ein druckloser Umlauf des Betriebsmittels erfolgt. Lässt die Bedienungsperson somit den Vorwahlhebel 6 des Umschaltventils 5 los, erfolgt durch die Rückstellung des Umschaltventils 5 in die Grundstellung keine Förderung des Betriebsmittels vom Umschaltventil zu den Werkzeugen.The choice of the respective switching position of the switching valve 5 via a selector lever 6, which can be operated manually by the operator. The switching valve 5 is designed so that it automatically passes in a release of the selector lever 6 by the operator due to a spring assembly 14 in the center figure shown in the single figure, in which only a non-pressurized circulation of the resource. If the operator thus releases the preselector lever 6 of the changeover valve 5, no return of the operating medium from the changeover valve to the tools occurs due to the return of the changeover valve 5 to the basic position.

Für die selbsttätige Festlegung der Grundstellung kann eine elastische Vorspannung beispielsweise in Form der vorgenannten Federanordnung 14 vorgesehen sein.For the automatic determination of the basic position, a resilient bias may be provided, for example in the form of the aforementioned spring assembly 14.

Die erfindungsgemäße Steuereinheit 1 umfasst des weiteren ein zusätzliches Steuermodul, insbesondere ein Steuerventil 7, welches zwischen dem Umschaltventil 5 und den Werkzeugen vorgesehen ist. Die Druckmittelleitung zwischen Umschaltventil 5 und den einzelnen Werkzeugen verläuft demzufolge über das Steuerventil 7.The control unit 1 according to the invention further comprises an additional control module, in particular a control valve 7, which is provided between the switching valve 5 and the tools. The pressure medium line between the changeover valve 5 and the individual tools thus runs via the control valve. 7

Auch das Steuerventil 7 ist manuell in seiner Stellung bedienbar, zweckmäßigerweise ebenfalls durch ein Bedienelement 8 z. B. einem Bedienhebel. Das Steuerventil 7 besitzt ebenfalls eine selbsttätige Rückstellfunktion bei Loslassen des Bedienhebels durch die Bedienperson in eine Grundstellung (in Zeichnungsfigur mittige Stellung), bei der die beiden Betriebsmittelleitungen 10, 11 der Werkzeuge jeweils gegen ein Rückschlagventil 20 geschaltet werden, Hierdurch kann - da Betriebsmittel nicht zum Umschaltventil 5 abfließen - sich ein lasthaltender Zustand an den Werkzeugen einstellen. Es ergib sich somit keine Veränderung der jeweiligen augenblicklichen Position des ersten Hebezylinders 2 bzw. zweiten Hebezylinders 3.The control valve 7 is manually operated in its position, expediently also by an operating element 8 z. B. a control lever. The control valve 7 also has an automatic reset function upon release of the operating lever by the operator in a basic position (in drawing figure central position), in which the two Operating medium lines 10, 11 of the tools are each switched to a check valve 20, This can - since resources do not flow to the changeover valve 5 - set a lasthaltender state of the tools. There is thus no change in the respective instantaneous position of the first lifting cylinder 2 or second lifting cylinder 3.

Für die selbsttätige Festlegung der Grundstellung des Steuerventils 7 kann ebenfalls eine elastische Vorspannung beispielsweise in Form einer Federanordnung 15 vorgesehen sein.For the automatic determination of the basic position of the control valve 7 may also be provided a resilient bias, for example in the form of a spring assembly 15.

Das Steuerventil 7 ist als sogenanntes Proportionalventil ausgeführt, mit der Folge, dass die Bedienungsperson über das Bedienelement 8 mit einer Hand die über das Steuerventil aufzuteilenden Volumenströme von der Pumpe 4 zu den einzelnen Werkzeugen beliebig teilen und damit die einzelnen Werkzeugen individuell ansteuern kann. Die Bedienungsperson kann das Steuerventil 7 nach Art einer Joystick-Steuerung mit der einen Hand bedienen, wobei sie mit der anderen Hand die Funktion des Umschaltventils 5 festlegt.The control valve 7 is designed as a so-called proportional valve, with the result that the operator over the control element 8 with one hand share the information about the control valve to be split volume flows from the pump 4 to the individual tools and thus individually control the individual tools. The operator can operate the control valve 7 in the manner of a joystick control with one hand, wherein it determines the function of the switching valve 5 with the other hand.

Wird somit unter Bezugnahme auf die einzige Zeichnungsfigur die Anordnung bestehend aus ersten Hebezylinders 2 und zweiten Hebezylinder 3 mittels der Steuereinrichtung 1 von einer einzigen Bedienungsperson bedient und fällt diese Bedienungsperson (beispielsweise durch Ohnmächtigwerden) aus, werden die Bedienelemente 6 und 8 losgelassen, woraufhin das Umschaltventil 5 sowie Steuerventil 7 jeweils in ihre Grundstellungen - wie dies in der Zeichnungsfigur dargestellt ist - sich begeben. Die Grundstellung des Umschaltventils 5 bewirkt, dass von der Pumpe Betriebsmittel in einem drucklosen Umlauf gefordert wird. Gleichzeitig gewährleistet die Grundstellung des Steuerventils 7, dass sich die Werkzeuge, d. h. der erste Hebezylinder 2 sowie zweite Hebezylinder 3 in ihrer augenblicklichen Position aufgrund der lasthaltenden Stellung nicht bewegen.Thus, with reference to the single drawing figure, when the assembly consisting of the first lifting cylinder 2 and the second lifting cylinder 3 is operated by the control means 1 by a single operator and if this operator falls (for example, by fainting), the controls 6 and 8 are released, whereupon the changeover valve 5 and control valve 7 each in their basic positions - as shown in the drawing figure - go. The basic position of the switching valve 5 causes the pump in a pressureless circulation is required. At the same time, the basic position of the control valve 7 ensures that the tools, ie the first lifting cylinder 2 and the second lifting cylinder 3, do not move in their current position due to the load-holding position.

Anstelle von zwei Werkzeugen können ebensogut eine größere Anzahl von Werkzeugen vorgesehen sein. Bei dem Umschaltventil 5 kann es sich konzeptionsbedingt in vorteilhafter Weise um ein herkömmliches Umschaltventil handeln, welches ohne konstruktive Änderungen einsetzbar ist. Das Steuerventil 7 und/oder Umschaltventil 5 können manuell oder motorisch angetrieben sein. Als Pumpe kann auch eine Pumpe mit mehreren untereinander unabhängigen Betriebsmittelkreisläufen so z. B. eine sog. Zweistrompumpe eingesetzt werden. In letzterem Fall könnten mit der erfindungsgemäßen Steuereinheit zwei Hebezylinder und eine Rettungsschere parallel betrieben werden.Instead of two tools as well as a larger number of tools may be provided. In the case of the changeover valve 5, due to the design, advantageously a conventional changeover valve can be used, which can be used without design changes. The control valve 7 and / or switching valve 5 can be driven manually or by motor. As a pump can also be a pump with several independent resource circuits such. B. a so-called. Zweistrompumpe be used. In the latter case, two lifting cylinders and a rescue scissors could be operated in parallel with the control unit according to the invention.

Die vorliegende Erfindung gewährleistet den gleichzeitigen Betrieb mehrerer Werkzeuge unter Verwendung einer Pumpe mit hohem Bedienkomfort für die Bedienungsperson, einer sicheren "Totmann-Funktion" und einem einfachen, unter Kostengesichtspunkten günstig realisierbaren Aufbau. Die Erfindung stellt daher einen ganz besonderen Beitrag auf dem einschlägigen Gebiet des Standes der Technik dar.The present invention ensures the simultaneous operation of multiple tools using a pump with a high operator comfort, a safe "deadman function" and a simple, low-cost realizable design. The invention therefore represents a very special contribution in the relevant field of the prior art.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
Steuereinrichtungcontrol device
22
erster Hebezylinderfirst lifting cylinder
33
zweiter Hebezylindersecond lifting cylinder
44
Pumpepump
55
Umschaltventilswitching valve
66
Bedienelementoperating element
77
Steuerventilcontrol valve
88th
Bedienelementoperating element
99
Bedienelementoperating element
1010
BetriebsmittelleitungResource management
1111
BetriebsmittelleitungResource management
1212
Rückleitungreturn
1313
Rückleitungreturn
1414
Federanordnungspring assembly
1515
Federanordnungspring assembly
1616
Reservoirreservoir
1717
ÜberdruckventilPressure relief valve
1818
Reservoirreservoir
1919
ZulaufIntake
2020
Rückschlagventilcheck valve

Claims (14)

  1. A control device (1) with a change-over valve (5), a pump (4), especially a motor-driven pump or a hand pump, which delivers an operating medium, and connecting means for connecting the control device (1) to at least two tools, especially a first lifting cylinder (2) and a second lifting cylinder (3) or the like, wherein the change-over valve (5) can be operated manually, wherein the change-over valve (5), upon release by the operator, is automatically movable into a home position in which a build-up of pressure in the region of the tools is not possible, characterised in that
    a) a control valve (7) is provided between the change-over valve (5) and the tools, wherein the outlet side of the control valve (7) is connected to the tools by operating-medium lines (10, 11), wherein the control valve (7) includes a home position in which the operating medium in the respective operating-medium line (10 or 11) cannot drain off to the change-over valve (5) or cannot drain off in substantial amounts,
    b) the control valve (7) is a proportional valve and can also be operated manually by an operator,
    c) a load-holding state prevails in the home position of the change-over valve (5) and the control valve (7), and
    d) two or more tools are controllable by the control valve (7).
  2. A control device according to claim 1, characterised in that the outlet side of the control valve (7) is directly connected to the tools by operating-medium lines (10, 11).
  3. A control device according to claim 1 or 2, characterised in that the control valve (7) has means for automatically returning the control valve (7) to a home position when the control valve (7) is released by the operator.
  4. A control device according to either one of claims 2 to 3, characterised in that, in the home position of the control valve (7), each operating-medium line (10, 11) is connected against a non-return valve (20).
  5. A control device according to any one of the preceding claims, characterised in that the control valve (7) has an operating member (8), especially an operating lever.
  6. A control device according to any one of the preceding claims, characterised in that the respective return line (12, 13) of the tools leads directly to the change-over valve (5).
  7. A control device according to any one of the preceding claims, characterised in that the home position of the change-over valve (5) is a position in which pressureless circulation is effected via the pump (4).
  8. A control device according to any one of the preceding claims, characterised in that a spring arrangement (15) is provided as a means for returning the control valve (7) to the home position.
  9. A control device according to any one of the preceding claims, characterised in that an operating member (6), especially a preselector lever, is provided for actuating the change-over valve (5).
  10. A control device according to any one of the preceding claims, characterised in that the control device (1) is provided as an independent unit which is connected to the pump (4) and the tools in each case by the operating-medium lines (10, 11) and return lines (12, 13).
  11. A control device according to any one of the preceding claims, characterised in that a pressure relief valve (17) is connected in the feed line (19) between the pump (4) and the change-over valve (5) and is connected to the reservoir (18) of the pump (4).
  12. A control device according to any one of the preceding claims, characterised in that the control device is provided in particular for maximum operating pressures starting from 300 bar, preferably up to 500 bar, preferably from 330 bar to 430 bar.
  13. A control device according to any one of the preceding claims, characterised in that hydraulic oil is provided as an operating medium.
  14. A control device according to any one of the preceding claims, characterised in that the tools are tools used in rescue technology, especially rescue, recovery, protection.
EP05022317A 2004-10-20 2005-10-13 Control device Not-in-force EP1650442B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004051213A DE102004051213B3 (en) 2004-10-20 2004-10-20 control device

Publications (2)

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EP1650442A1 EP1650442A1 (en) 2006-04-26
EP1650442B1 true EP1650442B1 (en) 2008-08-06

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US (1) US7409828B2 (en)
EP (1) EP1650442B1 (en)
JP (1) JP2006118707A (en)
CN (1) CN100478573C (en)
AT (1) ATE403806T1 (en)
AU (1) AU2005225054B2 (en)
DE (2) DE102004051213B3 (en)
ES (1) ES2309636T3 (en)
PT (1) PT1650442E (en)

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EP2268069A2 (en) 2009-06-23 2010-12-29 Swissphone Telecom AG Terminal for a telecommunications network, method for operating such a terminal and method for producing same

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DE102009024886B3 (en) * 2009-06-09 2010-12-02 Lukas Hydraulik Gmbh control device
EP2261512A2 (en) 2009-06-09 2010-12-15 Lukas Hydraulik GmbH Hydraulic control device
EP2268069A2 (en) 2009-06-23 2010-12-29 Swissphone Telecom AG Terminal for a telecommunications network, method for operating such a terminal and method for producing same

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Publication number Publication date
ES2309636T3 (en) 2008-12-16
CN100478573C (en) 2009-04-15
US20060081120A1 (en) 2006-04-20
EP1650442A1 (en) 2006-04-26
DE102004051213B3 (en) 2006-06-01
JP2006118707A (en) 2006-05-11
ATE403806T1 (en) 2008-08-15
AU2005225054B2 (en) 2008-11-20
AU2005225054A1 (en) 2006-05-04
CN1779277A (en) 2006-05-31
US7409828B2 (en) 2008-08-12
DE502005004933D1 (en) 2008-09-18
PT1650442E (en) 2008-10-10

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