EP0710774B1 - Power cylinder - Google Patents

Power cylinder Download PDF

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Publication number
EP0710774B1
EP0710774B1 EP95115386A EP95115386A EP0710774B1 EP 0710774 B1 EP0710774 B1 EP 0710774B1 EP 95115386 A EP95115386 A EP 95115386A EP 95115386 A EP95115386 A EP 95115386A EP 0710774 B1 EP0710774 B1 EP 0710774B1
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EP
European Patent Office
Prior art keywords
pressure medium
cylinder according
operating cylinder
piston
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95115386A
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German (de)
French (fr)
Other versions
EP0710774A3 (en
EP0710774A2 (en
Inventor
Lothar Müller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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Publication date
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Publication of EP0710774A2 publication Critical patent/EP0710774A2/en
Publication of EP0710774A3 publication Critical patent/EP0710774A3/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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1428—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/202—Externally-operated valves mounted in or on the actuator

Definitions

  • the invention relates to a working cylinder, with a housing, in which a piston chamber is formed, in which a piston which can be driven to move by the application of fluid located, and with an as an integral part of the Housing executed and fed from a pressure medium source Pressure fluid accumulator, which has at least one with the Piston chamber in fluid communication and together with the Piston chamber in the housing formed storage chamber, which, like the piston chamber, has a linear longitudinal extension.
  • the Pressure fluid accumulator contains a storage chamber, either in the axial extension of the piston chamber or as the piston chamber coaxial enclosing annular space is formed.
  • a pressure medium storage is also provided, the one has annular storage chamber which coaxial with the piston chamber encloses.
  • US 3 136 220 shows a working cylinder with an integrated Pressure fluid accumulator, the storage chamber and the piston chamber are arranged one behind the other.
  • a cylinder provided that the piston chamber and at least one storage chamber at a distance and parallel to one another with respect to the longitudinal extent arranged side by side are, being in one of an extruded component formed pipe section of the housing are in the they were molded during extrusion.
  • the working cylinder has its own pressure medium reservoir, where the working cylinder and the pressure medium accumulator are united in a compact design.
  • the pressure fluid reservoir places in the immediate vicinity of the piston chamber a volume of pressure medium is available in the working cylinder, the size of which can be easily measured such that the Reliable cylinder function required from case to case can be accessed. Due to the proximity to the piston chamber short fluid paths, so that there is no significant drop in pressure takes place and the working cylinder has a very good response features.
  • the piston chamber has a particularly compact design over an oval cross-section contoured like an ellipse, and the cross section of the storage chamber is rectangular.
  • the pressure medium accumulator to form a fluid spring especially one Air spring, pull the piston into a starting position biases.
  • the back pressure expediently can be adjusted by a pressure relief valve.
  • Fluid connection between the at least one storage chamber and the piston chamber one with regard to the passage cross section controlled connection is where expediently both working chambers of the piston chamber via its own controlled fluid connection with the storage chamber communicate.
  • A can be used as a control element
  • Control valve may be provided, for example in the design as a 3/2-way valve, the control valves in the housing can be integrated to another To contribute to the compactness of the working cylinder.
  • the working cylinder according to the example has a total designated 1 housing, which consists of a middle pipe section 2 and two on the end of this Pipe section 2 attached end caps 3, 4 is composed.
  • a middle pipe section 2 In the pipe section 2 is one over the entire Continuous, linearly extending piston chamber 5 formed, which has a cylindrical cross-sectional contour.
  • the piston chamber 5 opens on both ends of the Pipe section 2 and is there through the attached end cover 3, 4 tightly closed.
  • a piston 6 is axially displaceable in the piston chamber 5 arranged. It works sealingly with the peripheral wall of the Piston chamber 5 together and divides it axially into two working chambers 7, 8.
  • Both working chambers 7, 8 are with one following referred to as pressure medium, pressurized fluid acted upon in order to move the piston 6 into a linear movement to drive one way or the other.
  • compressed air is provided as the pressure medium.
  • the movement of the piston 6 is outside the housing 1 tapped.
  • the piston 6 stands with a piston rod 12 in connection, the at least one end cover 4 penetrates to the outside and the outside Section 13 the connection with an object to be moved allows.
  • the end cover 3 is one with the piston rod 12 cooperating sealing and / or guiding device 15 provided.
  • a pressure medium reservoir 16 In the Housing 1 is the usual housing function and one Storage function combined.
  • the pressure medium accumulator 16 1 to 4 of a storage chamber 17 is formed which, like the piston chamber 5 is designed as a cavity in the pipe section 2.
  • the Storage chamber 17 runs parallel to Longitudinal extension of the piston chamber 5 and that provided in it Piston tread. She is with each other opposite axial end faces 18, 18 'of the pipe section 2 open and there like the piston chamber 5 through the associated end cover 3, 4 completed.
  • the pipe section 2 very simple in the form of an extruded or drawn Manufacture profile part, the piston chamber 5 and the Storage chamber 17 immediately during production in the extrusion process be introduced.
  • the pipe section 2 thus practically represents a double pipe component, whereby at least the wall of the storage chamber 17 after extrusion no further post-processing is required since it no tread forms and no moving parts lead got to.
  • connection opening 22 On the housing 1 and preferably on the pipe section 2 a connection opening 22 is provided, which is from the outside is accessible and opens into the storage chamber 17.
  • the storage chamber 17 is via this connection opening 22 connectable to a pressure medium source P.
  • the connection is made via a rigid or flexible Line 23, which is releasably screwed to the connection opening 22 is.
  • the pressure medium source P is is, for example, a compressor. It needs an external pressure medium storage via its own arranged pressure medium source P is not necessarily to dispose of.
  • the pressure medium source which is preferably constantly present P is always a certain volume of air in the storage chamber 17 made available.
  • the one in the storage chamber 17 prevailing pressure medium pressure is a so-called Pressure reducer or a pressure control valve 24 as required given that in the connection between the Storage chamber 17 and the pressure medium source P switched on is. In this way, compliance can be more constant Guaranteed pressure conditions in the pressure medium accumulator 16 become.
  • the pressure control valve 24 can in the course the line 23 may be arranged, but is preferably in the housing 1 integrated.
  • the storage chamber 17 and the piston chamber 5 protrude at least one channel 25, 25 'in fluid communication. On this way the piston chamber 5 is pressure medium from the Storage chamber 17 can be fed. Since the latter in immediate Located near the piston chamber 5, no occurs significant pressure drop, so that there is a very good Response behavior in relation to the piston movement results. This also applies to the long-stroke version of the working cylinder.
  • both working chambers 7, 8 independently of one another in fluid communication with the storage chamber 17. In both cases Are there connections that with regard to the Pressure medium provided passage cross-section are controllable. Corresponding control devices are indicated in Fig. 1 and 2 at 26 and present formed by control valves 27, 27 '.
  • the two working chambers 7, 8 are each above one of the mentioned Channels 25, 25 'with the storage chamber 17 in connection, and each of these channels 25, 25 'is controlled by a control valve 27, 27 'mastered, expediently in the concerned Channel is interposed.
  • the exemplary control valves 27, 27 ' are to achieve a space-saving design in the housing 1 of Working cylinder integrated.
  • the two control valves 27, 27 'in the embodiment in the two opposite end caps 3, 4 installed, in which they are preferably completely are sunk.
  • the first is the one already mentioned Connection channel 25, 25 'through the control valve 27, 27 'is divided into two channel sections 28, 28', of which one in the storage chamber 17 and the other in the assigned working chamber 7 or 8 opens.
  • Ventilation channel 32 which also on the one hand in connection with the control valve 27, 27 ' stands, but on the other hand is open to the environment and on the outer surface of the associated end cover 3, 4 opens.
  • Lines or silencers can be attached.
  • the exemplary control valves 27, 27 ' are so-called 3/2-way valves executed and see two possible Switch positions.
  • the first switch position the open position, the two channel sections 28, 28 ' interconnected so that the passage through the relevant connection channel 25, 25 'is released.
  • the second switch position the closed position, is the blocked channel section 28 leading into the storage chamber 17, while the second channel section 28 'with the Vent channel 32 is connected so that pressure medium from the assigned working chamber 7 or 8 are displaced can.
  • the pressure medium reservoir 16 serves as internal pressure medium source from which the working chambers 7, 8 are fed as required and depending on the switching position the control valves 27, 27 'a movement of the Piston 6 are caused in a desired direction can.
  • control valves 27, 27 ' are advantageously electrical actuated and can be designed as solenoid valves his. Electrical supply lines are indicated at 33.
  • FIG. 4 Another design of the working cylinder according to the invention is shown in Fig. 4.
  • Fig. 4 In this case it just says one of the working chambers 7 with the storage chamber 17 in Fluid connection, which is an uncontrolled permanent connection, which is in the housing 1 trained connection channel 25 is provided.
  • the pressurized working chamber 7 is expedient the piston rod-side working chamber, so that the prevailing pressure medium pressure the piston-piston rod combination constantly acted upon in the direction of entry.
  • the Compressed air has the function of a fluidic return spring, who always tries the piston 6 in one Starting position on the piston rod 12 facing away Hold cover 3.
  • the second working chamber 8 is located above an intermediate one Control valve 34 with the pressure medium source P in Connection.
  • the associated working chamber 8 In a first switching position of the control valve 34 the associated working chamber 8 is vented, so that the piston 6, caused by the stored Pressure medium, held in the retracted starting position becomes.
  • the control valve 34 in a second switching position passes pressure medium from the Pressure medium source P in the working chamber 8 and moves the piston 6 against the restoring force towards opposite end cover 4.
  • This is the in the Chamber system consisting of the piston rod side Working chamber 7 and the storage chamber 17 existing air compressed so that the piston 6 after switching again of the control valve 34 in the starting position is pushed back.
  • the one presettable pressure rise opens to that mentioned in the Chamber system to limit pressure and to ensure that the piston 6 the maximum possible Hub can run.
  • the pressure medium reservoir 16 is supplied via a Line 23 of the type already described, the one Connection opening 22 of the pressure medium accumulator 16 with the Pressure medium source P connects.
  • a pressure control valve 24 turned on.
  • a check valve in this connection 36, which locks in the direction of the pressure medium source P to To prevent fluid push back.
  • Both the pressure relief valve 35 and the pressure control valve 24 and the check valve 36 can in the Housing 1 can be integrated.
  • piston rod 12 facing away Working chamber 8 instead of a direct connection to Pressure medium source P is also fed via the storage chamber 17 can be by the relevant control valve 34th arranged in the manner described in FIGS. 1 to 3 and is switched.
  • the housing 1 As a material for the housing 1 is expedient Aluminum material used. It is very suitable for the production by extrusion. Integration into the cylinder housing allowed particularly compact designs, since you have the option has, the storage chamber 17 practically any To give cross-sectional shapes and these optimal in Housing cross section to accommodate.
  • the working cylinder has a housing that despite the integration of multiple cavities builds relatively flat.
  • this is achieved in that an elliptical oval contoured piston chamber 5 with a correspondingly contoured piston 6 for use comes and the associated storage chamber 17 one rectangular cross section with a relatively low height.
  • the arrangement is such that the longitudinal axes of the Cross sections of the piston chamber 5 and the arranged above Storage chamber 17 aligned parallel to each other are, so that there is a minimum height.
  • FIG. 5 The one schematically indicated in FIG. 5 would also be possible Design, in which several storage chambers 17, here: two Piece, are formed independently and one have different internal pressures. This can be done for example by realizing that everyone Storage chambers 17 with the same pressure medium source P communicate that each storage chamber 17, however own pressure control valve 24 is assigned, with which the memory pressure can be set as required.
  • This arrangement allows the two working chambers 7, 8 with to apply different fluid pressures, whereby it would easily be possible with each working chamber 7, 8 to connect all the storage chambers 17 in a controlled manner a respective one by actuating the relevant control valve Working chamber with any storage chamber 17 to connect.
  • FIG. 5 are the two existing storage chambers 17 in the longitudinal direction of the Housing 1 shown one behind the other. It goes without saying however, that the multiple storage chambers 17 actually lie side by side and each according to the type of in Fig. 1 to 4 shown storage chambers over the entire length of the Go through pipe section 2 to a simple here To enable production by extrusion.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

Die Erfindung betrifft einen Arbeitszylinder, mit einem Gehäuse, in dem ein Kolbenraum ausgebildet ist, in dem sich ein durch Fluidbeaufschlagung zu einer Bewegung antreibbarer Kolben befindet, und mit einem als integraler Bestandteil des Gehäuses ausgeführten und von einer Druckmittelquelle gespeisten Druckmittelspeicher, der über mindestens eine mit dem Kolbenraum in Fluidverbindung stehende und gemeinsam mit dem Kolbenraum in dem Gehäuse ausgebildete Speicherkammer verfügt, die wie der Kolbenraum eine lineare Längserstreckung aufweist.The invention relates to a working cylinder, with a housing, in which a piston chamber is formed, in which a piston which can be driven to move by the application of fluid located, and with an as an integral part of the Housing executed and fed from a pressure medium source Pressure fluid accumulator, which has at least one with the Piston chamber in fluid communication and together with the Piston chamber in the housing formed storage chamber, which, like the piston chamber, has a linear longitudinal extension.

Verschiedene Varianten eines derartigen Arbeitszylinders gehen aus der DE 32 33 739 A hervor. Dort wird das im Druckspeicher gespeicherte Druckmittel für die Rückstellung des Kolbens nach Beendigung der Arbeitsbewegung herangezogen. Der Druckmittelspeicher enthält eine Speicherkammer, die entweder in axialer Verlängerung des Kolbenraumes oder als den Kolbenraum koaxial umschließender Ringraum ausgebildet ist.Different variants of such a working cylinder go from DE 32 33 739 A. There it is in the pressure accumulator stored pressure medium for resetting the Pistons used after completion of the work movement. The Pressure fluid accumulator contains a storage chamber, either in the axial extension of the piston chamber or as the piston chamber coaxial enclosing annular space is formed.

Bei einem aus der GB 1 347 264 hervorgehenden Arbeitszylinder ist ebenfalls ein Druckmittelspeicher vorgesehen, der eine ringförmige Speicherkammer aufweist, die den Kolbenraum koaxial umschließt.With a working cylinder originating from GB 1 347 264 a pressure medium storage is also provided, the one has annular storage chamber which coaxial with the piston chamber encloses.

Die US 3 136 220 zeigt einen Arbeitszylinder mit integriertem Druckmittelspeicher, wobei die Speicherkammer und der Kolbenraum hintereinander angeordnet sind.US 3 136 220 shows a working cylinder with an integrated Pressure fluid accumulator, the storage chamber and the piston chamber are arranged one behind the other.

Es ist die Aufgabe der vorliegenden Erfindung, einen Arbeitszylinder zu schaffen, der über einen kostengünstigen und kompakten Aufbau verfügt. It is the object of the present invention to provide a working cylinder to create one that is inexpensive and compact Construction.

Zur Lösung dieser Aufgabe ist bei einem Arbeitszylinder der eingangs genannten Art vorgesehen, daß der Kolbenraum und mindestens eine Speicherkammer mit Abstand und bezüglich Längserstreckung parallel zueinander seitlich nebeneinanderliegend angeordnet sind, wobei sie sich in einem von einem extrudierten Bauteil gebildeten Rohrabschnitt des Gehäuses befinden, in den sie beim Extrudieren eingeformt wurden.To solve this problem is in a cylinder provided that the piston chamber and at least one storage chamber at a distance and parallel to one another with respect to the longitudinal extent arranged side by side are, being in one of an extruded component formed pipe section of the housing are in the they were molded during extrusion.

Somit verfügt der Arbeitszylinder über einen eigenen Druckmittelspeicher, wobei der Arbeitszylinder und der Druckmittelspeicher in kompakter Bauweise vereinigt sind. Der Druckmittelspeicher stellt in unmittelbarer Nähe des Kolbenraumes des Arbeitszylinders ein Druckmittelvolumen zur Verfügung, dessen Größe sich problemlos derart bemessen läßt, daß die von Fall zu Fall erforderliche Zylinderfunktion zuverlässig abgerufen werden kann. Durch die Nähe zum Kolbenraum ergeben sich kurze Fluidwege, so daß kein nennenswerter Druckabfall stattfindet und der Arbeitszylinder über ein sehr gutes Ansprechverhalten verfügt. Dabei eröffnen sich vielfältige Gestaltungs- und Anwendungsmöglichkeiten, die unter anderem davon abhängig sind, ob die Speicherkammer des Druckmittelspeichers ständig mit wenigstens einer Arbeitskammer des Arbeitszylinders in Verbindung steht, oder ob in die Fluidverbindung Steuerelemente zwischengeschaltet sind, die eine Steuerung des Durchtrittsquerschnittes ermöglichen. Indem man einen Rohrabschnitt des Gehäuses als extrudiertes Bauteil ausführt, in das der Kolbenraum und die Speicherkammer integral eingeformt sind, läßt sich kostengünstig eine kompakte Einheit realisieren.Thus, the working cylinder has its own pressure medium reservoir, where the working cylinder and the pressure medium accumulator are united in a compact design. The pressure fluid reservoir places in the immediate vicinity of the piston chamber a volume of pressure medium is available in the working cylinder, the size of which can be easily measured such that the Reliable cylinder function required from case to case can be accessed. Due to the proximity to the piston chamber short fluid paths, so that there is no significant drop in pressure takes place and the working cylinder has a very good response features. This opens up a variety of design and possible uses, including among them depend on whether the storage chamber of the pressure fluid storage constantly with at least one working chamber of the working cylinder communicates, or whether in the fluid connection Controls are interposed that are a controller of the passage cross section. By one Executes the pipe section of the housing as an extruded component, in which the piston chamber and the storage chamber are integrally molded are, a compact unit can be inexpensively realize.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen aufgeführt.Advantageous developments of the invention are in the subclaims listed.

Bei einer besonders kompakten Bauform verfügt der Kolbenraum über einen ellipsenähnlich konturierten ovalen Querschnitt, und der Querschnitt der Speicherkammer ist rechteckförmig gestaltet. The piston chamber has a particularly compact design over an oval cross-section contoured like an ellipse, and the cross section of the storage chamber is rectangular.

Bei einer Ausgestaltung, bei der die Speicherkammer des Druckmittelspeichers in ständiger Verbindung mit der einen Arbeitskammer des Kolbenraumes steht, läßt sich der Druckmittelspeicher zur Bildung einer Fluidfeder, insbesondere einer Luftfeder, heranziehen, die den Kolben in eine Ausgangslage vorspannt. Beim Verlagern des Kolbens arbeitet dieser somit gegen ein Fluidpolster, wobei der Gegendruck zweckmäßigerweise durch ein Überdruckventil eingestellt werden kann.In an embodiment in which the storage chamber of the Pressure fluid storage in constant connection with one Is the working chamber of the piston chamber, the pressure medium accumulator to form a fluid spring, especially one Air spring, pull the piston into a starting position biases. When the piston is displaced, it therefore works against a fluid cushion, the back pressure expediently can be adjusted by a pressure relief valve.

Eine weitere vorteilhafte Ausgestaltung sieht vor, daß die Fluidverbindung zwischen der mindestens einen Speicherkammer und dem Kolbenraum eine hinsichtlich des Durchtrittsquerschnittes gesteuerte Verbindung ist, wobei zweckmäßigerweise beide Arbeitskammern des Kolbenraumes über eine eigene gesteuerte Fluidverbindung mit der Speicherkammer kommunizieren. Als Steuerelement kann ein Steuerventil vorgesehen sein, beispielsweise in der Ausgestaltung als 3/2-Wegeventil, wobei die Steuerventile in das Gehäuse integriert sein können, um einen weiteren Beitrag zur Kompaktheit des Arbeitszylinders zu liefern.Another advantageous embodiment provides that the Fluid connection between the at least one storage chamber and the piston chamber one with regard to the passage cross section controlled connection is where expediently both working chambers of the piston chamber via its own controlled fluid connection with the storage chamber communicate. A can be used as a control element Control valve may be provided, for example in the design as a 3/2-way valve, the control valves in the housing can be integrated to another To contribute to the compactness of the working cylinder.

Es wäre möglich, den Druckmittelspeicher mit mehreren voneinander unabhängigen Speicherkammern auszustatten, in denen unterschiedliche Fluidmengen und/oder unterschiedliche Fluiddrücke zur Verfügung gestellt werden, um entsprechend der jeweils gewählten Verbindung mit dem Kolbenraum unterschiedliche Betriebsverhalten herbeizuführen. Auf diese Weise ließen sich ohne großen Aufwand die Geschwindigkeit und/oder die Stellkraft variieren.It would be possible to store the pressure medium with several of them independent storage chambers, in which different amounts of fluid and / or different Fluid pressures are provided to match accordingly the selected connection with the piston chamber to bring about different operational behavior. In this way, the speed could be increased without great effort and / or the actuating force vary.

Nachfolgend wird die Erfindung anhand der beiliegenden Zeichnung näher erläutert. In dieser zeigen:

Fig. 1
eine erste Bauform des erfindungsgemäßen Arbeitszylinders in perspektivischer Darstellung,
Fig. 2
einen Längsschnitt durch den Arbeitszylinder aus Fig. 1 gemäß Schnittlinie II-II,
Fig. 3
in schematischer Darstellung ein mehrere der erfindungsgemäßen Arbeitszylinder umfassendes Druckmittelnetz,
Fig. 4
eine weitere Bauform des erfindungsgemäßen Arbeitszylinders im Längsschnitt, analog der Darstellungsweise gemäß Fig. 2,
Fig. 5
ein weiteres Ausführungsbeispiel des erfindungsgemäßen Arbeitszylinders, bei dem ein Druckmittelspeicher in Mehrkammerausführung vorgesehen ist.
The invention is explained in more detail below with reference to the accompanying drawing. In this show:
Fig. 1
a first design of the working cylinder according to the invention in a perspective view,
Fig. 2
2 shows a longitudinal section through the working cylinder from FIG. 1 according to section line II-II,
Fig. 3
a schematic representation of a pressure medium network comprising several of the working cylinders according to the invention,
Fig. 4
another design of the working cylinder according to the invention in longitudinal section, analogous to the representation according to FIG. 2,
Fig. 5
a further embodiment of the working cylinder according to the invention, in which a pressure medium reservoir is provided in a multi-chamber design.

Der beispielsgemäße Arbeitszylinder verfügt über ein insgesamt mit 1 bezeichnetes Gehäuse, das sich aus einem mittleren Rohrabschnitt 2 und zwei stirnseitig an diesen Rohrabschnitt 2 angesetzten Abschlußdeckeln 3, 4 zusammensetzt. In dem Rohrabschnitt 2 ist ein über die gesamte Länge durchgehender, sich linear erstreckender Kolbenraum 5 ausgebildet, der eine zylindrische Querschnittskontur hat. The working cylinder according to the example has a total designated 1 housing, which consists of a middle pipe section 2 and two on the end of this Pipe section 2 attached end caps 3, 4 is composed. In the pipe section 2 is one over the entire Continuous, linearly extending piston chamber 5 formed, which has a cylindrical cross-sectional contour.

Der Kolbenraum 5 öffnet sich zu beiden Stirnseiten des Rohrabschnittes 2 und ist dort durch die angesetzten Abschlußdeckel 3, 4 dicht verschlossen.The piston chamber 5 opens on both ends of the Pipe section 2 and is there through the attached end cover 3, 4 tightly closed.

In dem Kolbenraum 5 ist ein Kolben 6 axial verschiebbar angeordnet. Er arbeitet dichtend mit der Umfangswand des Kolbenraumes 5 zusammen und unterteilt diesen axial in zwei Arbeitskammern 7, 8. Auf noch zu erläuternde Art und Weise sind beide Arbeitskammern 7, 8 mit einem nachfolgend als Druckmittel bezeichneten, unter Druck stehenden Fluid beaufschlagbar, um den Kolben 6 zu einer Linearbewegung in die eine oder andere Richtung anzutreiben. Beim Ausführungsbeispiel ist Druckluft als Druckmittel vorgesehen.A piston 6 is axially displaceable in the piston chamber 5 arranged. It works sealingly with the peripheral wall of the Piston chamber 5 together and divides it axially into two working chambers 7, 8. In a manner still to be explained and Both working chambers 7, 8 are with one following referred to as pressure medium, pressurized fluid acted upon in order to move the piston 6 into a linear movement to drive one way or the other. In the embodiment compressed air is provided as the pressure medium.

Die Bewegung des Kolbens 6 ist außerhalb des Gehäuses 1 abgreifbar. Hierzu steht der Kolben 6 mit einer Kolbenstange 12 in Verbindung, die wenigstens einen Abschlußdeckel 4 zur Außenseite hin durchsetzt und deren äußerer Abschnitt 13 die Verbindung mit einem zu bewegenden Gegenstand ermöglicht. In der entsprechenden Durchbrechung 14 des Abschlußdeckels 3 ist eine mit der Kolbenstange 12 zusammenwirkende Dichtungs- und/oder Führungseinrichtung 15 vorgesehen.The movement of the piston 6 is outside the housing 1 tapped. For this purpose, the piston 6 stands with a piston rod 12 in connection, the at least one end cover 4 penetrates to the outside and the outside Section 13 the connection with an object to be moved allows. In the corresponding opening 14 the end cover 3 is one with the piston rod 12 cooperating sealing and / or guiding device 15 provided.

Integraler Bestandteil des Gehäuses 1 und vorliegend des Rohrabschnittes 2 ist ein Druckmittelspeicher 16. In dem Gehäuse 1 ist also die übliche Gehäusefunktion und eine Speicherfunktion vereinigt. Der Druckmittelspeicher 16 wird bei den Ausführungsbeispielen der Fig. 1 bis 4 von einer Speicherkammer 17 gebildet, die wie der Kolbenraum 5 als Hohlraum in dem Rohrabschnitt 2 ausgeführt ist. Die Speicherkammer 17 verläuft parallel zur Längserstreckung des Kolbenraumes 5 und der in diesem vorgesehenen Kolbenlauffläche. Sie ist zu den beiden einander entgegengesetzten axialen Stirnseiten 18, 18' des Rohrabschnittes 2 offen und dort wie der Kolbenraum 5 durch den zugeordneten Abschlußdeckel 3, 4 abgeschlossen.An integral part of the housing 1 and in the present case the Pipe section 2 is a pressure medium reservoir 16. In the Housing 1 is the usual housing function and one Storage function combined. The pressure medium accumulator 16 1 to 4 of a storage chamber 17 is formed which, like the piston chamber 5 is designed as a cavity in the pipe section 2. The Storage chamber 17 runs parallel to Longitudinal extension of the piston chamber 5 and that provided in it Piston tread. She is with each other opposite axial end faces 18, 18 'of the pipe section 2 open and there like the piston chamber 5 through the associated end cover 3, 4 completed.

Auf Grund der geschilderten Ausgestaltung des Kolbenraumes 5 und der Speicherkammer 17 läßt sich der Rohrabschnitt 2 sehr einfach in Gestalt eines extrudierten bzw. gezogenen Profilteils herstellen, wobei der Kolbenraum 5 und die Speicherkammer 17 unmittelbar bei der Herstellung im Extrudierverfahren eingebracht werden. Der Rohrabschnitt 2 stellt somit praktisch ein Doppelrohr-Bauteil dar, wobei zumindest die Wandung der Speicherkammer 17 nach dem Extrudieren keiner weiteren Nachbearbeitung bedarf, da sie keine Lauffläche bildet und keine bewegten Teile führen muß. Due to the described design of the piston chamber 5 and the storage chamber 17, the pipe section 2 very simple in the form of an extruded or drawn Manufacture profile part, the piston chamber 5 and the Storage chamber 17 immediately during production in the extrusion process be introduced. The pipe section 2 thus practically represents a double pipe component, whereby at least the wall of the storage chamber 17 after extrusion no further post-processing is required since it no tread forms and no moving parts lead got to.

An dem Gehäuse 1 und vorzugsweise an dem Rohrabschnitt 2 ist eine Anschlußöffnung 22 vorgesehen, die von außen her zugänglich ist und in die Speicherkammer 17 ausmündet. Über diese Anschlußöffnung 22 ist die Speicherkammer 17 mit einer Druckmittelquelle P verbindbar. Beispielsgemäß erfolgt die Verbindung über eine starre oder flexible Leitung 23, die an die Anschlußöffnung 22 lösbar anschraubbar ist. Bei der Druckmittelquelle P handelt es sich beispielsgemäß um einen Verdichter bzw. Kompressor. Über einen eigenen Druckmittelspeicher braucht diese extern angeordnete Druckmittelquelle P nicht notwendigerweise zu verfügen.On the housing 1 and preferably on the pipe section 2 a connection opening 22 is provided, which is from the outside is accessible and opens into the storage chamber 17. The storage chamber 17 is via this connection opening 22 connectable to a pressure medium source P. According to the example the connection is made via a rigid or flexible Line 23, which is releasably screwed to the connection opening 22 is. The pressure medium source P is is, for example, a compressor. It needs an external pressure medium storage via its own arranged pressure medium source P is not necessarily to dispose of.

Über die vorzugsweise ständig anliegende Druckmittelquelle P wird in der Speicherkammer 17 stets ein bestimmtes Luftvolumen zur Verfügung gestellt. Der in der Speicherkammer 17 herrschende Druckmitteldruck wird über einen sogenannten Druckminderer bzw. ein Druckregelventil 24 bedarfsgemäß vorgegeben, das in die Verbindung zwischen der Speicherkammer 17 und der Druckmittelquelle P eingeschaltet ist. Auf diese Weise kann die Einhaltung konstanter Druckverhältnisse in dem Druckmittelspeicher 16 gewährleistet werden. Das Druckregelventil 24 kann im Verlauf der Leitung 23 angeordnet sein, ist vorzugsweise jedoch in das Gehäuse 1 integriert. Via the pressure medium source, which is preferably constantly present P is always a certain volume of air in the storage chamber 17 made available. The one in the storage chamber 17 prevailing pressure medium pressure is a so-called Pressure reducer or a pressure control valve 24 as required given that in the connection between the Storage chamber 17 and the pressure medium source P switched on is. In this way, compliance can be more constant Guaranteed pressure conditions in the pressure medium accumulator 16 become. The pressure control valve 24 can in the course the line 23 may be arranged, but is preferably in the housing 1 integrated.

Die Speicherkammer 17 und der Kolbenraum 5 stehen über wenigstens einen Kanal 25, 25' in Fluidverbindung. Auf diese Weise ist dem Kolbenraum 5 Druckmittel aus der Speicherkammer 17 zuführbar. Da sich letztere in unmittelbarer Nähe des Kolbenraumes 5 befindet, tritt kein nennenswerter Druckabfall auf, so daß sich ein sehr gutes Ansprechverhalten in bezug auf die Kolbenbewegung ergibt. Dies auch bei langhubiger Ausführung des Arbeitszylinders.The storage chamber 17 and the piston chamber 5 protrude at least one channel 25, 25 'in fluid communication. On this way the piston chamber 5 is pressure medium from the Storage chamber 17 can be fed. Since the latter in immediate Located near the piston chamber 5, no occurs significant pressure drop, so that there is a very good Response behavior in relation to the piston movement results. This also applies to the long-stroke version of the working cylinder.

Im Falle der Ausführungsform gemäß Fig. 1 bis 3 stehen beide Arbeitskammern 7, 8 unabhängig voneinander in Fluidverbindung mit der Speicherkammer 17. In beiden Fällen handelt es sich um Verbindungen, die hinsichtlich des dem Druckmittel zur Verfügung gestellten Durchtrittsquerschnittes steuerbar sind. Entsprechende Steuereinrichtungen sind in Fig. 1 und 2 bei 26 angedeutet und vorliegend von Steuerventilen 27, 27' gebildet. Die beiden Arbeitskammern 7, 8 stehen jeweils über einen der erwähnten Kanäle 25, 25' mit der Speicherkammer 17 in Verbindung, und jeder dieser Kanäle 25, 25' wird von einem Steuerventil 27, 27' beherrscht, das zweckmäßigerweise in den betreffenden Kanal zwischengeschaltet ist. Die beispielsgemäßen Steuerventile 27, 27' sind Schaltventile, die den Durchgang durch den zugeordneten Kanal 25, 25' wahlweise freigeben oder vollständig absperren. Es versteht sich jedoch, daß ohne weiteres auch Steuerventile vorgesehen werden können, mit denen sich Zwischenstellungen zwischen der Schließstellung und der maximalen Offenstellung vorgeben lassen, wobei insbesondere an sogenannte Proportionalventile gedacht ist.In the case of the embodiment according to FIGS. 1 to 3 both working chambers 7, 8 independently of one another in fluid communication with the storage chamber 17. In both cases Are there connections that with regard to the Pressure medium provided passage cross-section are controllable. Corresponding control devices are indicated in Fig. 1 and 2 at 26 and present formed by control valves 27, 27 '. The two working chambers 7, 8 are each above one of the mentioned Channels 25, 25 'with the storage chamber 17 in connection, and each of these channels 25, 25 'is controlled by a control valve 27, 27 'mastered, expediently in the concerned Channel is interposed. The example Control valves 27, 27 'are switching valves that control the passage optionally through the assigned channel 25, 25 ' or shut off completely. However, it is understood that control valves are readily provided can with which intermediate positions between the Specify the closed position and the maximum open position let, especially on so-called proportional valves is thought.

Die beispielsgemäßen Steuerventile 27, 27' sind zur Erzielung einer platzsparenden Bauform in das Gehäuse 1 des Arbeitszylinders integriert. Zu diesem Zweck sind die beiden Steuerventile 27, 27' beim Ausführungsbeispiel in die beiden einander entgegengesetzt angeordneten Abschlußdeckel 3, 4 eingebaut, in denen sie vorzugsweise vollständig versenkt aufgenommen sind. Dabei kommuniziert jedes Steuerventil 27, 27' mit mehreren Kanälen, die im Innern des zugeordneten Abschlußdeckels 3, 4 verlaufen. Hierbei handelt es sich als erstes um den schon erwähnten Verbindungskanal 25, 25', der durch das Steuerventil 27, 27' in zwei Kanalabschnitte 28, 28' unterteilt wird, wovon der eine in die Speicherkammer 17 und der andere in die zugeordnete Arbeitskammer 7 bzw. 8 mündet. Des weiteren ist ein Entlüftungskanal 32 vorhanden, der ebenfalls einerseits mit dem Steuerventil 27, 27' in Verbindung steht, andererseits jedoch zur Umgebung offen ist und an der Außenfläche des zugeordneten Abschlußdeckels 3, 4 ausmündet. Hier können selbstverständlich weiterführende Leitungen oder Schalldämpfer angebracht werden.The exemplary control valves 27, 27 'are to achieve a space-saving design in the housing 1 of Working cylinder integrated. For this purpose, the two control valves 27, 27 'in the embodiment in the two opposite end caps 3, 4 installed, in which they are preferably completely are sunk. Communicates each control valve 27, 27 'with several channels, which in the Run inside the associated end cover 3, 4. The first is the one already mentioned Connection channel 25, 25 'through the control valve 27, 27 'is divided into two channel sections 28, 28', of which one in the storage chamber 17 and the other in the assigned working chamber 7 or 8 opens. Furthermore there is a ventilation channel 32, which also on the one hand in connection with the control valve 27, 27 ' stands, but on the other hand is open to the environment and on the outer surface of the associated end cover 3, 4 opens. Of course, further courses can be found here Lines or silencers can be attached.

Die beispielsgemäßen Steuerventile 27, 27' sind als sogenannte 3/2-Wegeventile ausgeführt und sehen zwei mögliche Schaltstellungen vor. In der ersten Schaltstellung, der Offenstellung, sind die beiden Kanalabschnitte 28, 28' miteinander verbunden, so daß der Durchgang durch den betreffenden Verbindungskanal 25, 25' freigegeben ist. In der zweiten Schaltstellung, der Schließstellung, ist der in die Speicherkammer 17 führende Kanalabschnitt 28 abgesperrt, während der zweite Kanalabschnitt 28' mit dem Entlüftungskanal 32 verbunden ist, so daß Druckmittel aus der zugeordneten Arbeitskammer 7 bzw. 8 verdrängt werden kann. Auf diese Weise dient der Druckmittelspeicher 16 als interne Druckmittelquelle, von der aus die Arbeitskammern 7, 8 nach Bedarf gespeist werden und wobei je nach Schaltstellung der Steuerventile 27, 27' eine Bewegung des Kolbens 6 in einer gewünschten Richtung verursacht werden kann.The exemplary control valves 27, 27 'are so-called 3/2-way valves executed and see two possible Switch positions. In the first switch position, the open position, the two channel sections 28, 28 ' interconnected so that the passage through the relevant connection channel 25, 25 'is released. In the second switch position, the closed position, is the blocked channel section 28 leading into the storage chamber 17, while the second channel section 28 'with the Vent channel 32 is connected so that pressure medium from the assigned working chamber 7 or 8 are displaced can. In this way, the pressure medium reservoir 16 serves as internal pressure medium source from which the working chambers 7, 8 are fed as required and depending on the switching position the control valves 27, 27 'a movement of the Piston 6 are caused in a desired direction can.

Die Steuerventile 27, 27' sind zweckmäßigerweise elektrisch betätigt und können als Magnetventile ausgeführt sein. Elektrische Zuleitungen sind bei 33 angedeutet.The control valves 27, 27 'are advantageously electrical actuated and can be designed as solenoid valves his. Electrical supply lines are indicated at 33.

Mehrere Arbeitszylinder der in Fig. 1 und 2 gezeigten Art lassen sich im Rahmen eines Druckmittelnetzes miteinander kombinieren, wie es in Fig. 3 schematisch angedeutet ist. Hier sind mehrere Arbeitszylinder über die erwähnten Leitungen 23 an eine gemeinsame Druckluftquelle P angeschlossen, die parallel die Druckmittelspeicher 16 aller Arbeitszylinder gefüllt hält. Da jedem Arbeitszylinder in unmittelbarer Nähe sein eigener Druckmittelspeicher 16 zugeordnet ist, liegt selbst bei gleichzeitiger Betätigung sämtlicher Arbeitszylinder in jedem Kolbenraum ausreichend Druck und Luftvolumen an, um eine sichere Funktion zu gewährleisten.Several working cylinders of those shown in Figs. 1 and 2 Kind can be within the framework of a pressure medium network combine, as indicated schematically in Fig. 3 is. Here are several cylinders about the ones mentioned Lines 23 connected to a common compressed air source P, the parallel the pressure medium storage 16 of all Keep working cylinder filled. Because every working cylinder in in the immediate vicinity of its own pressure medium reservoir 16 is assigned, even when pressed simultaneously all working cylinders in each piston chamber are sufficient Pressure and air volume to ensure a safe function.

Eine weitere Bauform des erfindungsgemäßen Arbeiszylinders ist in Fig. 4 gezeigt. In diesem Falle steht lediglich eine der Arbeitskammern 7 mit der Speicherkammer 17 in Fluidverbindung, wobei es sich um eine ungesteuerte ständige Verbindung handelt, die durch einen im Gehäuse 1 ausgebildeten Verbindungskanal 25 bereitgestellt wird. Dies bewirkt, daß die angeschlossene Arbeitskammer 7 ständig von Druckmittel beaufschlagt wird und unter Druck steht. Die beaufschlagte Arbeitskammer 7 ist zweckmäßigerweise die kolbenstangenseitige Arbeitskammer, so daß der herrschende Druckmitteldruck die Kolben-Kolbenstangen-Kombination ständig im Einfahrsinne beaufschlagt. Die Druckluft hat hier die Funktion einer fluidischen Rückstellfeder, die versucht, den Kolben 6 immer in einer Ausgangsstellung an dem der Kolbenstange 12 abgewandten Abschlußdeckel 3 zu halten.Another design of the working cylinder according to the invention is shown in Fig. 4. In this case it just says one of the working chambers 7 with the storage chamber 17 in Fluid connection, which is an uncontrolled permanent connection, which is in the housing 1 trained connection channel 25 is provided. This causes the connected working chamber 7th is constantly pressurized and under pressure stands. The pressurized working chamber 7 is expedient the piston rod-side working chamber, so that the prevailing pressure medium pressure the piston-piston rod combination constantly acted upon in the direction of entry. The Compressed air has the function of a fluidic return spring, who always tries the piston 6 in one Starting position on the piston rod 12 facing away Hold cover 3.

Die zweite Arbeitskammer 8 steht über ein zwischengeschaltetes Steuerventil 34 mit der Druckmittelquelle P in Verbindung. In einer ersten Schaltstellung des Steuerventils 34 ist die zugeordnete Arbeitskammer 8 entlüftet, so daß der Kolben 6, verursacht durch das gespeicherte Druckmittel, in der eingefahrenen Ausgangsstellung gehalten wird. Nach dem Umschalten des Steuerventils 34 in eine zweite Schaltstellung gelangt Druckmittel von der Druckmittelquelle P in die Arbeitskammer 8 und verschiebt den Kolben 6 entgegen der Rückstellkraft in Richtung zum gegenüberliegenden Abschlußdeckel 4. Dabei wird die in dem Kammersystem bestehend aus der kolbenstangenseitigen Arbeitskammer 7 und der Speicherkammer 17 vorhandene Luft komprimiert, so daß der Kolben 6 nach dem erneuten Umschalten des Steuerventils 34 in die Ausgangsstellung zurückgedrängt wird.The second working chamber 8 is located above an intermediate one Control valve 34 with the pressure medium source P in Connection. In a first switching position of the control valve 34 the associated working chamber 8 is vented, so that the piston 6, caused by the stored Pressure medium, held in the retracted starting position becomes. After switching the control valve 34 in a second switching position passes pressure medium from the Pressure medium source P in the working chamber 8 and moves the piston 6 against the restoring force towards opposite end cover 4. This is the in the Chamber system consisting of the piston rod side Working chamber 7 and the storage chamber 17 existing air compressed so that the piston 6 after switching again of the control valve 34 in the starting position is pushed back.

Zweckmäßigerweise ist an die Speicherkammer 17 in diesem Falle ein Überdruckventil 35 angeschlossen, das bei einem voreinstellbaren Druckanstieg öffnet, um den in dem erwähnten Kammersystem herrschenden Druck zu begrenzen und zu gewährleisten, daß der Kolben 6 den maximal möglichen Hub ausführen kann.It is expedient for the storage chamber 17 in this Case connected to a pressure relief valve 35, the one presettable pressure rise opens to that mentioned in the Chamber system to limit pressure and to ensure that the piston 6 the maximum possible Hub can run.

Die Speisung des Druckmittelspeichers 16 erfolgt über eine Leitung 23 der bereits oben geschilderten Art, die eine Anschlußöffnung 22 des Druckmittelspeichers 16 mit der Druckmittelquelle P verbindet. Hier ist wiederum zweckmäßigerweise ein Druckregelventil 24 eingeschaltet. Ferner befindet sich in dieser Verbindung ein Rückschlagventil 36, das in Richtung zur Druckmittelquelle P sperrt, um ein Zurückdrängen von Fluid zu verhindern.The pressure medium reservoir 16 is supplied via a Line 23 of the type already described, the one Connection opening 22 of the pressure medium accumulator 16 with the Pressure medium source P connects. Here again is expedient a pressure control valve 24 turned on. Further there is a check valve in this connection 36, which locks in the direction of the pressure medium source P to To prevent fluid push back.

Sowohl das Überdruckventil 35 als auch das Druckregelventil 24 und das Rückschlagventil 36 können in das Gehäuse 1 integriert sein.Both the pressure relief valve 35 and the pressure control valve 24 and the check valve 36 can in the Housing 1 can be integrated.

Es versteht sich, daß die der Kolbenstange 12 abgewandte Arbeitskammer 8 anstelle einer direkten Verbindung zur Druckmittelquelle P auch über die Speicherkammer 17 gespeist werden kann, indem das betreffende Steuerventil 34 in der zu Fig. 1 bis 3 beschriebenen Art und Weise angeordnet und geschaltet wird.It is understood that the piston rod 12 facing away Working chamber 8 instead of a direct connection to Pressure medium source P is also fed via the storage chamber 17 can be by the relevant control valve 34th arranged in the manner described in FIGS. 1 to 3 and is switched.

Als Material für das Gehäuse 1 wird zweckmäßigerweise Aluminiummaterial verwendet. Es eignet sich sehr gut für die Herstellung durch Extrudieren. Die Integration in das Zylindergehäuse gestattet besonders kompakte Bauformen, da man die Möglichkeit hat, der Speicherkammer 17 praktisch beliebige Querschnittsformen zu verleihen und diese optimal im Gehäusequerschnitt unterzubringen.As a material for the housing 1 is expedient Aluminum material used. It is very suitable for the production by extrusion. Integration into the cylinder housing allowed particularly compact designs, since you have the option has, the storage chamber 17 practically any To give cross-sectional shapes and these optimal in Housing cross section to accommodate.

Beim Ausführungsbeispiel verfügt der Arbeitszylinder über ein Gehäuse, das trotz der Integration mehrerer Hohlräume verhältnismäßig flach baut. Erreicht wird dies zum einen dadurch, daß ein ellipsenähnlich oval konturierter Kolbenraum 5 mit entsprechend konturiertem Kolben 6 zur Anwendung kommt und die zugeordnete Speicherkammer 17 einen rechteckquerschnitt mit relativ geringer Höhe aufwéist. Die Anordnung ist so getroffen, daß die Längsachsen der Querschnitte des Kolbenraumes 5 und der darüber angeordneten Speicherkammer 17 parallel zueinander ausgerichtet sind, so daß sich eine minimale Bauhöhe einstellt.In the exemplary embodiment, the working cylinder has a housing that despite the integration of multiple cavities builds relatively flat. On the one hand, this is achieved in that an elliptical oval contoured piston chamber 5 with a correspondingly contoured piston 6 for use comes and the associated storage chamber 17 one rectangular cross section with a relatively low height. The arrangement is such that the longitudinal axes of the Cross sections of the piston chamber 5 and the arranged above Storage chamber 17 aligned parallel to each other are, so that there is a minimum height.

Es wäre denkbar, den Arbeitszylinder mit mehreren Speicherkammern 17 auszustatten. Diese könnten derart miteinander verknüpft sein, daß sich das zur Verfügung gestellte Speichervolumen insgesamt vergrößert. Dies macht es möglich, mehrere Steuerkammern 17 in günstigster Verteilung im Innern der Gehäusewandung vorzusehen.It would be conceivable to have the working cylinder with several storage chambers 17 to equip. These could be so together be linked that the provided Total storage volume increased. This makes it possible several control chambers 17 in the most favorable distribution to be provided inside the housing wall.

Möglich wäre auch die in Fig. 5 schematisch angedeutete Bauform, bei der mehrere Speicherkammern 17, hier: zwei Stück, unabhängig voneinander ausgebildet sind und einen unterschiedlichen Innendruck aufweisen. Dies läßt sich beispielsweise dadurch verwirklichen, daß zwar alle Speicherkammern 17 mit der gleichen Druckmittelquelle P kommunizieren, daß jeder Speicherkammer 17 jedoch ein eigenes Druckregelventil 24 zugeordnet ist, mit dem sich der Speicherdruck nach Bedarf vorgeben läßt. Diese Anordnung ermöglicht es, die beiden Arbeitskammern 7, 8 mit unterschiedlichen Fluiddrücken zu beaufschlagen, wobei es ohne weiteres möglich wäre, jede Arbeitskammer 7, 8 mit sämtlichen Speicherkammern 17 gesteuert zu verbinden, um durch Betätigung des betreffenden Steuerventils eine jeweilige Arbeitskammer mit einer beliebigen Speicherkammer 17 zu verbinden.The one schematically indicated in FIG. 5 would also be possible Design, in which several storage chambers 17, here: two Piece, are formed independently and one have different internal pressures. This can be done for example by realizing that everyone Storage chambers 17 with the same pressure medium source P communicate that each storage chamber 17, however own pressure control valve 24 is assigned, with which the memory pressure can be set as required. This arrangement allows the two working chambers 7, 8 with to apply different fluid pressures, whereby it would easily be possible with each working chamber 7, 8 to connect all the storage chambers 17 in a controlled manner a respective one by actuating the relevant control valve Working chamber with any storage chamber 17 to connect.

In der schematischen Darstellung der Fig. 5 sind die beiden vorhandenen Speicherkammern 17 in Längsrichtung des Gehäuses 1 hintereinanderliegend gezeigt. Es versteht sich jedoch, daß die mehreren Speicherkammern 17 tatsächlich nebeneinanderliegen und jeweils nach Art der in Fig. 1 bis 4 gezeigten Speicherkammern über die gesamte Länge des Rohrabschnittes 2 durchgehen, um auch hier eine einfache Herstellung durch Extrudieren zu ermöglichen.5 are the two existing storage chambers 17 in the longitudinal direction of the Housing 1 shown one behind the other. It goes without saying however, that the multiple storage chambers 17 actually lie side by side and each according to the type of in Fig. 1 to 4 shown storage chambers over the entire length of the Go through pipe section 2 to a simple here To enable production by extrusion.

Claims (18)

  1. Operating cylinder with a housing (1) in which is formed a piston space (5) in which is located a piston (6) capable of being driven to movement by means of fluid pressurisation, and with a pressure medium accumulator (16), designed as an integral part of the housing (1) and supplied from a pressure medium source (P), which has at least one accumulator chamber (17) in fluid connection with the piston space (5) and formed together with the piston space (5) in the housing (1), and having like the piston space (5) a linear longitudinal extent, characterized in that the piston space (5) and one or more of the accumulator chambers (17) are arranged alongside one another, wherein they are located in a tube section (2) of the housing (1) formed by an extruded component, in which they are formed during extrusion.
  2. Operating cylinder according to claim 1, characterized in that the piston space (5) and the accumulator chamber (17) of the pressure medium accumulator (16) each have an elongated cross-section, wherein the longitudinal axes of the cross-sections run parallel to one another.
  3. Operating cylinder according to claim 1 or 2, characterized in that the piston space (5) has an ellipse-like cross-section.
  4. Operating cylinder according to any of claims 1 to 3, characterized in that the accumulator chamber (17) has a rectangular-shaped cross-section.
  5. Operating cylinder according to any of claims 1 to 4, characterized in that the housing is made of aluminium material.
  6. Operating cylinder according to any of claims 1 to 5, characterized in that the accumulator chamber (17) of the pressure medium accumulator (16) is in constant connection with one of the two operating chambers (7, 8) divided off by the piston (6) in the piston space (5).
  7. Operating cylinder according to claim 6, characterized in that there is fitted to the piston (6) a piston rod (12), wherein the operating chamber communicating with the accumulator chamber (17) is the operating chamber (7) on the piston rod side.
  8. Operating cylinder according to claim 6 or 7, characterized in that a relief valve (35) is connected to the accumulator chamber (17).
  9. Operating cylinder according to any of claims 6 to 8, characterized in that the other operating chamber (8) is connected to the pressure medium source (P) via a control valve (34) in the form of a 3/2-way valve.
  10. Operating cylinder according to any of claims 1 to 9, characterized in that the fluid connection between the accumulator chamber or chambers (17) and the piston space (5) is a connection which can be controlled in respect of the passage cross-section.
  11. Operating cylinder according to claim 10, characterized in that at least one control valve (27, 27'), for example a 3/2-way valve, is inserted in the fluid connection.
  12. Operating cylinder according to claim 11, characterized in that one or both of the operating chambers (7, 8) divided off by the piston (6) in the piston space (5) communicates or communicate with the accumulator chamber (17) via a connection duct (25, 25') formed in the housing (1), wherein a control valve (27, 27') is expediently installed in the housing (1).
  13. Operating cylinder according to claim 11 or 12, characterized in that each control valve (27,27') is installed in an end face cover (3, 4) of the housing (1).
  14. Operating cylinder according to any of claims 1 to 13, characterized in that a pressure control valve (24) is inserted between the pressure medium accumulator (16) and the pressure medium source (P).
  15. Operating cylinder according to claim 14, characterized in that a non-return valve (36) is connected to the pressure control valve (24) in series.
  16. Operating cylinder according to claim 14 or 15, characterized in that the relevant valve (24, 36) is installed in the pressure medium accumulator (16) or the housing (1).
  17. Operating cylinder according to any of claims 1 to 16, characterized in that it is part of a multiple arrangement of operating cylinders with pressure medium accumulators (16) connected in parallel, wherein all pressure medium accumulators (16) located in or on the respectively assigned operating cylinder are connected to a common pressure medium source (P).
  18. Operating cylinder according to any of claims 1 to 17, characterized in that the pressure medium accumulator (16) has several accumulator chambers (17) separated from one another and able to provide different fluid quantities and/or different fluid pressures.
EP95115386A 1994-11-07 1995-09-29 Power cylinder Expired - Lifetime EP0710774B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4439667A DE4439667C2 (en) 1994-11-07 1994-11-07 Working cylinder
DE4439667 1994-11-07

Publications (3)

Publication Number Publication Date
EP0710774A2 EP0710774A2 (en) 1996-05-08
EP0710774A3 EP0710774A3 (en) 1998-07-29
EP0710774B1 true EP0710774B1 (en) 2002-01-09

Family

ID=6532639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115386A Expired - Lifetime EP0710774B1 (en) 1994-11-07 1995-09-29 Power cylinder

Country Status (4)

Country Link
US (1) US5638676A (en)
EP (1) EP0710774B1 (en)
KR (1) KR0158761B1 (en)
DE (2) DE4439667C2 (en)

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Also Published As

Publication number Publication date
KR0158761B1 (en) 1998-12-01
KR960018487A (en) 1996-06-17
DE4439667C2 (en) 1998-07-02
EP0710774A3 (en) 1998-07-29
DE59509989D1 (en) 2002-02-14
US5638676A (en) 1997-06-17
DE4439667A1 (en) 1996-05-09
EP0710774A2 (en) 1996-05-08

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