EP1249620B1 - Position sensor for linear actuator - Google Patents

Position sensor for linear actuator Download PDF

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Publication number
EP1249620B1
EP1249620B1 EP02006141A EP02006141A EP1249620B1 EP 1249620 B1 EP1249620 B1 EP 1249620B1 EP 02006141 A EP02006141 A EP 02006141A EP 02006141 A EP02006141 A EP 02006141A EP 1249620 B1 EP1249620 B1 EP 1249620B1
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EP
European Patent Office
Prior art keywords
linear drive
housing
connection device
drive according
housing cover
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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EP02006141A
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German (de)
French (fr)
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EP1249620A1 (en
Inventor
Stephan Demuth
Uwe GRÄFF
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Festo SE and Co KG
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Festo SE and Co KG
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Publication of EP1249620A1 publication Critical patent/EP1249620A1/en
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    • 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
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means

Definitions

  • the invention relates to a linear drive, with a housing, the one tubular middle part and two on the front arranged housing cover contains, arranged in the housing Position detection means and with one in the area placed at least one housing cover, in structural unit electromechanical trained with the position detection means Connection device for releasably connecting a from the side on the outside to a side surface oriented sideways of the housing cover brought up electrical conductor arrangement to the position detection means, the electromechanical Connection device without overhang regarding the side surface oriented completely sunk in a receiving recess open to this outer surface of the housing cover is housed.
  • a fluid-actuated linear drive known from FR-A-2794236 This type contains an elongated housing with a front arranged housing covers and one housed in the housing Piston that acts on a linear motion by fluid can be initiated. The linear movement leaves grab on a force tapping part from the outside to to move any object.
  • the linear drive equipped with position detection means which via a Electrical conductor arrangement with a cable shape external electronic evaluation device can be connected can.
  • position detection means Electromechanical plunging centrally into the housing cover Connection device provided, which is recessed in a open side surface of the housing cover Well, the one with the electrical conductor arrangement plug inserted can be.
  • Linear drives are the position detection means in housed the wall of the housing of the linear drive.
  • the electrical contact is made from the side of the linear drive forth in the area of a housing cover from which one connection unit connected to the position detection means protrudes.
  • the Electromechanical connection device in the area of the sideways oriented outer surface of the housing cover, being arranged flush with this lateral outer surface and that the position detection means starting from the housing cover in a recess in the wall of the Middle part are inserted.
  • the electromechanical connection device is thus still completely embedded in the housing cover, so that the The transverse dimensions of the linear drive remain compact. About that in addition, the ease of cleaning is also improved, so that the linear drive for use in the food industry is well suited.
  • the electromechanical connection device is for the electrical contacting one with the electrical conductor arrangement connected connecting part expediently equipped with plug contacts.
  • the plug contacts are preferred designed as pins, the one to be connected Connection part is designed like a socket.
  • the one for mechanical fixation with the electrical Means arrangement connected connecting part serving means the electromechanical connection device preferably contain a screw thread, being a particularly useful Design provides an internal thread.
  • the latter can be easy to integrate into the housing cover.
  • thread sizes smaller than M8 are relatively easy in this way feasible, for example M6 thread.
  • the position detection means can be, for example, from a Position sensor be formed. An embodiment would also be possible as a position measuring system.
  • the linear drive is preferably a fluid-actuated linear drive, with a through in the housing Fluid power adjustable piston is arranged.
  • the piston is equipped with actuators that are capable of are to operate the position detection means without contact.
  • a fluid-actuated linear drive 1 is shown in the drawing out, which has an elongated housing 2, which a tubular middle part 3 and two end faces on the middle part 3 arranged housing covers 4, 5 contains.
  • housing 2 Inside the housing 2 is one in the direction of Longitudinal axis 6 of the housing 2 extending piston receiving space 7. It is on the side of the middle part 3 and the front of the two housing covers 4, 5 limited.
  • the piston receiving space 7 is arranged by one in it Slidable piston 8 axially divided into two working spaces 9, 10.
  • Each work room is located in the neighboring one Housing cover 4, 5 running fluid channel 12, 13 in connection, over the compressed air or another fluidic actuation medium can be fed or dissipated to the Piston 8 for a linear movement in one or the other Direction.
  • the linear movement of the piston 8 can be outside the housing 2 on a force-tapping member that is motion-coupled to the piston 8 14 can be tapped. In this way, a any component can be moved and / or positioned.
  • the Linear drive 1 of the exemplary embodiment is a working cylinder, wherein the force tap member 14 as with the piston 8th firmly connected piston rod is formed, at least one of the housing cover 4 slidably guided under seal penetrated to the outside.
  • One arranged on the housing cover 4 Guide device and sealing device are schematically indicated at 15.
  • the linear drive is equipped with position detection means 16, that are capable of one or more axial positions to detect the piston 8.
  • position detection means 16 that are capable of one or more axial positions to detect the piston 8.
  • the position detection means 16 could also be so be designed so that they each have several axial positions of the piston 8 can capture, in particular an embodiment can act as a path measuring system with which at least along a certain distance, every momentary position of the piston 8 can be detected.
  • the position detection means 16 are completely inside the housing 2 housed. Are in the embodiment it is formed by a rod-shaped position sensor, which by the end face of the middle part facing the housing cover 4 3 forth in a receiving recess 17 of this middle part 3 is inserted.
  • the position detection means 16 contain in the embodiment specifically a rod-like housing with housed in it Detection means that are not in the drawing are shown in more detail.
  • the detection means can from Piston 8 arranged actuating means 18 actuated without contact be, especially if the latter in one of the detection means reach radially within the opposite position.
  • the actuating means 18 exist in the embodiment from a permanent magnetic ring element, the detection means form a so-called reed switch, the is actuated by the magnetic force.
  • the position detection means 16 and the actuating means 18 possible.
  • the electrical conductor arrangement 22 includes one or more electrical conductors - In the embodiment, two pieces - and is special trained like a cable. In Fig. 1, an end region is the electrical conductor assembly 22 visible, on which an electromechanical Connection part 23 is arranged.
  • connection part 23rd The connection part 23rd
  • a major advantage of the arrangement described is in that the electromechanical connection device 24 without overhang with respect to the sideways oriented outer surface 25 completely sunk in the housing cover 4 is.
  • a flush installation is provided, which has the advantage that there is no deepening, in the later operation, with the connector connected 23, could deposit contaminants.
  • the electromechanical connection device 24 is as a unit with the position detection means 16 trained. Therefore, a common, unified Mount on linear actuator 1. It is special possible the housing of the position detection means 16 and the housing of the electromechanical connection device 24 train in one piece.
  • the electromechanical connection device 24 is in one to the laterally oriented outer surface 25 of the housing cover 4 accommodated open recess 26 of the housing cover 4. This has one pointing towards the middle part 3 Opening 27 through which the position detection means 16 protrude can.
  • the electromechanical connection device 24 has the Embodiment of a in the receiving recess 26th seated socket-like housing part 28, the inner circumference with a screw thread 32 designed as an internal thread Is provided. Compared to a design with an external thread the chosen design enables a simpler one Production and assembly with very compact dimensions.
  • connection part provided on the electrical conductor arrangement 22 23 is equipped with a rotatable screw element 33, which has an external thread with which it can be used the screw thread 32 of the connection device 24 from the outside can be screwed in here to achieve the desired mechanical fastening to obtain.
  • connection of the connection part 23 to the connection device 24 is a combined plug-screw process.
  • the electrical connection is made by a plug-in process, the mechanical connection by a screwing process.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Transmission Devices (AREA)

Description

Die Erfindung betrifft einen Linearantrieb, mit einem Gehäuse, das ein rohrförmiges Mittelteil und zwei stirnseitig daran angeordnete Gehäusedeckel enthält, mit im Gehäuse angeordneten Positionserfassungsmitteln und mit einer im Bereich mindestens eines Gehäusedeckels platzierten, in Baueinheit mit den Positionserfassungsmitteln ausgebildeten elektromechanischen Anschlusseinrichtung zum lösbaren Anschließen einer von seitlich außen her an eine seitwärts orientierte Außenfläche des Gehäusedeckels herangeführten elektrischen Leiteranordnung an die Positionserfassungsmittel, wobei die elektromechanische Anschlusseinrichtung ohne Überstand bezüglich der seitwärts orientierten Außenfläche vollständig versenkt in einer zu dieser Außenfläche hin offenen Aufnahmevertiefung des Gehäusedeckels untergebracht ist.The invention relates to a linear drive, with a housing, the one tubular middle part and two on the front arranged housing cover contains, arranged in the housing Position detection means and with one in the area placed at least one housing cover, in structural unit electromechanical trained with the position detection means Connection device for releasably connecting a from the side on the outside to a side surface oriented sideways of the housing cover brought up electrical conductor arrangement to the position detection means, the electromechanical Connection device without overhang regarding the side surface oriented completely sunk in a receiving recess open to this outer surface of the housing cover is housed.

Ein aus der FR-A-2794236 bekannter fluidbetätigter Linearantrieb dieser Art enthält ein längliches Gehäuse mit stirnseitig angeordneten Gehäusedeckeln und einem im Gehäuse untergebrachten Kolben, der durch Fluidbeaufschlagung zu einer Linearbewegung veranlasst werden kann. Die Linearbewegung lässt sich an einem Kraftabgriffsteil von außen her abgreifen, um einen beliebigen Gegenstand zu bewegen. Zur Erfassung einer oder mehrerer Positionen des Kolbens ist der Linearantrieb mit Positionserfassungsmitteln ausgestattet, die über eine in Kabelform ausgeführte elektrische Leiteranordnung mit einer externen elektronischen Auswerteeinrichtung verbunden werden können. Hierzu ist an den Positionserfassungsmitteln eine zentral in den Gehäusedeckel eintauchende elektromechanische Anschlusseinrichtung vorgesehen, die vertieft in einer zur seitwärts orientierten Außenoberfläche des Gehäusedeckels offenen Aufnahmevertiefung zu liegen kommt, in die ein mit der elektrischen Leiteranordnung versehener Stecker eingesteckt werden kann.A fluid-actuated linear drive known from FR-A-2794236 This type contains an elongated housing with a front arranged housing covers and one housed in the housing Piston that acts on a linear motion by fluid can be initiated. The linear movement leaves grab on a force tapping part from the outside to to move any object. To capture a or several positions of the piston is the linear drive equipped with position detection means, which via a Electrical conductor arrangement with a cable shape external electronic evaluation device can be connected can. For this there is a on the position detection means Electromechanical plunging centrally into the housing cover Connection device provided, which is recessed in a open side surface of the housing cover Well, the one with the electrical conductor arrangement plug inserted can be.

Bei einem aus dem deutschen Gebrauchsmuster DE-U-20014353 bekannten Linearantrieb sind die Positionserfassungsmittel in der Wandung des Gehäuses des Linearantriebes untergebracht. Die elektrische Kontaktierung erfolgt von der Seite des Linearantriebes her im Bereich eines Gehäusedeckels, aus dem eine mit den Positionserfassungsmitteln verbundene Anschlusseinheit herausragt.In a known from the German utility model DE-U-20014353 Linear drives are the position detection means in housed the wall of the housing of the linear drive. The electrical contact is made from the side of the linear drive forth in the area of a housing cover from which one connection unit connected to the position detection means protrudes.

Es ist die Aufgabe der vorliegenden Erfindung, einen Linearantrieb zu schaffen, der über kompakte Abmessungen verfügt und sehr reinigungsfreundlich ist.It is the object of the present invention to provide a linear drive to create, which has compact dimensions and is very easy to clean.

Zur Lösung dieser Aufgabe ist vorgesehen, dass sich die elektromechanische Anschlusseinrichtung im Bereich der seitwärts orientierten Außenfläche des Gehäusedeckels befindet, wobei sie bündig mit dieser seitlichen Außenfläche angeordnet ist, und dass die Positionserfassungsmittel ausgehend vom Gehäusedeckel in eine Aufnahmevertiefung in der Wandung des Mittelteils eingesteckt sind.To solve this task it is provided that the Electromechanical connection device in the area of the sideways oriented outer surface of the housing cover, being arranged flush with this lateral outer surface and that the position detection means starting from the housing cover in a recess in the wall of the Middle part are inserted.

Die elektromechanische Anschlusseinrichtung ist somit weiterhin komplett in den Gehäusedeckel eingelassen, sodass die Querabmessungen des Linearantriebes kompakt bleiben. Darüber hinaus wird aber auch die Reinigungsfreundlichkeit verbessert, sodass der Linearantrieb für Einsätze in der Lebensmittelindustrie gut geeignet ist.The electromechanical connection device is thus still completely embedded in the housing cover, so that the The transverse dimensions of the linear drive remain compact. About that in addition, the ease of cleaning is also improved, so that the linear drive for use in the food industry is well suited.

Vorteilhafte Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor.Advantageous developments of the invention emerge from the subclaims out.

Die elektromechanische Anschlusseinrichtung ist für die elektrische Kontaktierung eines mit der elektrischen Leiteranordnung verbundenen Anschlussteiles zweckmäßigerweise mit Steckkontakten ausgestattet. Die Steckkontakte sind vorzugsweise als Steckstifte ausgebildet, wobei das anzuschließende Anschlussteil buchsenartig ausgeführt ist.The electromechanical connection device is for the electrical contacting one with the electrical conductor arrangement connected connecting part expediently equipped with plug contacts. The plug contacts are preferred designed as pins, the one to be connected Connection part is designed like a socket.

Die zur mechanischen Fixierung eines mit der elektrischen Leiteranordnung verbundenen Anschlussteils dienenden Mittel der elektromechanischen Anschlusseinrichtung enthalten vorzugsweise ein Schraubgewinde, wobei eine besonders zweckmäßige Bauform ein Innengewinde vorsieht. Letzteres lässt sich besonders einfach in den Gehäusedeckel integrieren. Auch Gewindegrößen kleiner als M8 sind auf diese Weise relativ einfach realisierbar, beispielsweise M6-Gewinde.The one for mechanical fixation with the electrical Means arrangement connected connecting part serving means the electromechanical connection device preferably contain a screw thread, being a particularly useful Design provides an internal thread. The latter can be easy to integrate into the housing cover. Also thread sizes smaller than M8 are relatively easy in this way feasible, for example M6 thread.

Die Positionserfassungsmittel können beispielsweise von einem Positionssensor gebildet sein. Möglich wäre auch eine Ausgestaltung als Wegmesssystem.The position detection means can be, for example, from a Position sensor be formed. An embodiment would also be possible as a position measuring system.

Vorzugsweise handelt es sich bei dem Linearantrieb um einen fluidbetätigten Linearantrieb, wobei im Gehäuse ein durch Fluidkraft verstellbarer Kolben angeordnet ist. Der Kolben ist mit Betätigungsmitteln ausgestattet, die in der Lage sind, die Positionserfassungsmittel berührungslos zu betätigen.The linear drive is preferably a fluid-actuated linear drive, with a through in the housing Fluid power adjustable piston is arranged. The piston is equipped with actuators that are capable of are to operate the position detection means without contact.

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

Fig. 1
eine schematische Darstellung des erfindungsgemäßen Linearantriebes in einer Seitenansicht und
Fig. 2
einen Endbereich des Linearantriebes aus Fig. 1 im Längsschnitt gemäß Schnittlinie II-II.
The invention is explained in more detail below with reference to the accompanying drawing. In this show:
Fig. 1
a schematic representation of the linear drive according to the invention in a side view and
Fig. 2
an end portion of the linear actuator of FIG. 1 in longitudinal section along section line II-II.

Aus der Zeichnung geht ein fluidbetätigter Linearantrieb 1 hervor, der ein längliches Gehäuse 2 aufweist, welches ein rohrförmiges Mittelteil 3 und zwei stirnseitig an dem Mittelteil 3 angeordnete Gehäusedeckel 4, 5 enthält.A fluid-actuated linear drive 1 is shown in the drawing out, which has an elongated housing 2, which a tubular middle part 3 and two end faces on the middle part 3 arranged housing covers 4, 5 contains.

Im Innern des Gehäuses 2 befindet sich ein in Richtung der Längsachse 6 des Gehäuses 2 verlaufender Kolbenaufnahmeraum 7. Er wird seitlich vom Mittelteil 3 und stirnseitig von den beiden Gehäusedeckeln 4, 5 begrenzt.Inside the housing 2 is one in the direction of Longitudinal axis 6 of the housing 2 extending piston receiving space 7. It is on the side of the middle part 3 and the front of the two housing covers 4, 5 limited.

Der Kolbenaufnahmeraum 7 wird von einem in ihm angeordneten verschiebbaren Kolben 8 axial in zwei Arbeitsräume 9, 10 unterteilt. Jeder Arbeitsraum steht mit einem im benachbarten Gehäusedeckel 4, 5 verlaufenden Fluidkanal 12, 13 in Verbindung, über den Druckluft oder ein sonstiges fluidisches Betätigungsmedium eingespeist oder abgeführt werden kann, um den Kolben 8 zu einer Linearbewegung in die eine oder andere Richtung zu veranlassen. The piston receiving space 7 is arranged by one in it Slidable piston 8 axially divided into two working spaces 9, 10. Each work room is located in the neighboring one Housing cover 4, 5 running fluid channel 12, 13 in connection, over the compressed air or another fluidic actuation medium can be fed or dissipated to the Piston 8 for a linear movement in one or the other Direction.

Die Linearbewegung des Kolbens 8 kann außerhalb des Gehäuses 2 an einem mit dem Kolben 8 bewegungsgekoppelten Kraftabgriffsglied 14 abgegriffen werden. Auf diese Weise kann ein beliebiges Bauteil bewegt und/oder positioniert werden. Der Linearantrieb 1 des Ausführungsbeispiels ist ein Arbeitszylinder, wobei das Kraftabgriffsglied 14 als mit dem Kolben 8 fest verbundene Kolbenstange ausgebildet ist, die zumindest einen der Gehäusedeckel 4 unter Abdichtung verschiebbar geführt nach außen hin durchsetzt. Eine am Gehäusedeckel 4 angeordnete Führungseinrichtung und Abdichteinrichtung sind schematisch bei 15 angedeutet.The linear movement of the piston 8 can be outside the housing 2 on a force-tapping member that is motion-coupled to the piston 8 14 can be tapped. In this way, a any component can be moved and / or positioned. The Linear drive 1 of the exemplary embodiment is a working cylinder, wherein the force tap member 14 as with the piston 8th firmly connected piston rod is formed, at least one of the housing cover 4 slidably guided under seal penetrated to the outside. One arranged on the housing cover 4 Guide device and sealing device are schematically indicated at 15.

Der Linearantrieb ist mit Positionserfassungsmitteln 16 ausgestattet, die in der Lage sind, eine oder mehrere Axialpositionen des Kolbens 8 zu erfassen. Beim Ausführungsbeispiel sind derartige Positionserfassungsmittel 16 zweifach vorhanden und jeweils einem Gehäusedeckel 4, 5 zugeordnet, wobei sie ausgebildet sind, um die dem betreffenden Gehäusedeckel 4, 5 zugeordnete Endlage des Kolbens 8 zu detektieren. Alternativ könnten die Positionserfassungsmittel 16 aber auch so ausgebildet sein, dass sie jeweils mehrere Axialpositionen des Kolbens 8 erfassen können, wobei es sich insbesondere um eine Ausgestaltung als Wegmesssystem handeln kann, mit dem, zumindest entlang einer gewissen Wegstrecke, jede Momentanposition des Kolbens 8 detektiert werden kann.The linear drive is equipped with position detection means 16, that are capable of one or more axial positions to detect the piston 8. In the embodiment there are two such position detection means 16 and each assigned to a housing cover 4, 5, wherein they are designed to cover the relevant housing 4, 5 associated end position of the piston 8 to be detected. alternative the position detection means 16 could also be so be designed so that they each have several axial positions of the piston 8 can capture, in particular an embodiment can act as a path measuring system with which at least along a certain distance, every momentary position of the piston 8 can be detected.

Die weitere Beschreibung der Erfindung erfolgt anhand der dem vom Kraftabgriffsglied 14 durchsetzten Gehäusedeckel 4 zugeordneten Positionserfassungsmittel 16, wobei die dem entgegengesetzten Gehäusedeckel 5 zugeordneten Positionserfassungsmittel 16 vergleichbar ausgebildet und angeordnet sind. The further description of the invention is based on the assigned by the force tapping member 14 through the housing cover 4 Position detection means 16, the opposite of which Housing cover 5 associated position detection means 16 are of comparable design and arrangement.

Es wäre im Übrigen ohne weitere möglich, Positionserfassungsmittel 16 lediglich im Bereich eines Gehäusedeckels 4, 5 anzuordnen.Incidentally, it would be possible without further position detection means 16 only to be arranged in the area of a housing cover 4, 5.

Die Positionserfassungsmittel 16 sind vollständig im Innern des Gehäuses 2 untergebracht. Beim Ausführungsbeispiel sind sie von einem stabförmigen Positionssensor gebildet, der von der dem Gehäusedeckel 4 zugewandten Stirnseite des Mittelteils 3 her in eine Aufnahmevertiefung 17 dieses Mittelteils 3 eingesteckt ist.The position detection means 16 are completely inside the housing 2 housed. Are in the embodiment it is formed by a rod-shaped position sensor, which by the end face of the middle part facing the housing cover 4 3 forth in a receiving recess 17 of this middle part 3 is inserted.

Die Positionserfassungsmittel 16 enthalten beim Ausführungsbeispiel im Einzelnen ein stabähnliches Gehäuse mit darin untergebrachten Detektionsmitteln, die in der Zeichnung nicht näher dargestellt sind. Die Detektionsmittel können von am Kolben 8 angeordneten Betätigungsmitteln 18 berührungslos betätigt werden, insbesondere wenn letztere in eine den Detektionsmitteln radial innerhalb gegenüberliegende Position gelangen.The position detection means 16 contain in the embodiment specifically a rod-like housing with housed in it Detection means that are not in the drawing are shown in more detail. The detection means can from Piston 8 arranged actuating means 18 actuated without contact be, especially if the latter in one of the detection means reach radially within the opposite position.

Die Betätigungsmittel 18 beim Ausführungsbeispiel bestehen aus einem permanentmagnetischen Ringelement, wobei die Detektionsmittel einen so genannten Reed-Schalter bilden, der durch die Magnetkraft betätigt wird. Es sind allerdings auch andere Ausgestaltungen der Positionserfassungsmittel 16 und der Betätigungsmittel 18 möglich.The actuating means 18 exist in the embodiment from a permanent magnetic ring element, the detection means form a so-called reed switch, the is actuated by the magnetic force. However, there are also other configurations of the position detection means 16 and the actuating means 18 possible.

Bei Betätigung der Positionserfassungsmittel 16 werden ein oder mehrere Sensorsignale erzeugt, die über eine elektrische Leiteranordnung 22 einer nicht näher dargestellten elektronischen Auswerteeinheit zugeführt werden. Die elektrische Leiteranordnung 22 enthält einen oder mehrere elektrische Leiter - beim Ausführungsbeispiel zwei Stück - und ist insbesondere kabelartig ausgebildet. In Fig. 1 ist ein Endbereich der elektrischen Leiteranordnung 22 sichtbar, an der ein elektromechanisches Anschlussteil 23 angeordnet ist.When the position detection means 16 are actuated or generates several sensor signals via an electrical Conductor assembly 22 of an electronic, not shown Evaluation unit are supplied. The electrical conductor arrangement 22 includes one or more electrical conductors - In the embodiment, two pieces - and is special trained like a cable. In Fig. 1, an end region is the electrical conductor assembly 22 visible, on which an electromechanical Connection part 23 is arranged.

Die Kontaktierung der elektrischen Leiteranordnung 22 mit den Positionserfassungsmitteln 16 bzw. deren Detektionsmitteln geschieht unter Vermittlung einer den Positionserfassungsmitteln 16 zugeordneten elektromechanischen Anschlusseinrichtung 24. Diese ist im Bereich der seitwärts orientierten Außenfläche 25 des Gehäusedeckels 4 platziert und so ausgebildet, dass die flexible elektrische Leiteranordnung 22 von der Seite des Linearantriebes 1 her daran lösbar angeschlossen werden kann. Das Anschließen erfolgt unter Vermittlung des Anschlussteils 23.The contacting of the electrical conductor arrangement 22 with the Position detection means 16 or their detection means happens with the mediation of one of the position detection means 16 associated electromechanical connection device 24. This is in the area of the side surface oriented sideways 25 of the housing cover 4 placed and designed so that the flexible electrical conductor assembly 22 from the side of the linear drive 1 ago releasably connected to it can. The connection is made through the connection part 23rd

Ein wesentlicher Vorteil der beschriebenen Anordnung besteht darin, dass die elektromechanische Anschlusseinrichtung 24 ohne Überstand bezüglich der seitwärts orientierten Außenfläche 25 vollständig versenkt im Gehäusedeckel 4 untergebracht ist. Dabei ist ein flächenbündiger Einbau vorgesehen, was den Vorteil hat, dass keine Vertiefung entsteht, in der sich im späteren Betrieb, bei angeschlossenem Anschlussteil 23, Verunreinigungen absetzen könnten.A major advantage of the arrangement described is in that the electromechanical connection device 24 without overhang with respect to the sideways oriented outer surface 25 completely sunk in the housing cover 4 is. A flush installation is provided, which has the advantage that there is no deepening, in the later operation, with the connector connected 23, could deposit contaminants.

Die elektromechanische Anschlusseinrichtung 24 ist als Baueinheit mit den Positionserfassungsmitteln 16 ausgebildet. Daher kann eine gemeinsame, einheitliche Montage am Linearantrieb 1 erfolgen. Es ist insbesondere möglich, das Gehäuse der Positionserfassungsmittel 16 und das Gehäuse der elektromechanischen Anschlusseinrichtung 24 einstückig auszubilden.The electromechanical connection device 24 is as a unit with the position detection means 16 trained. Therefore, a common, unified Mount on linear actuator 1. It is special possible the housing of the position detection means 16 and the housing of the electromechanical connection device 24 train in one piece.

Die elektromechanische Anschlusseinrichtung 24 ist in einer zur seitwärts orientierten Außenfläche 25 des Gehäusedeckels 4 hin offenen Aufnahmevertiefung 26 des Gehäusedeckels 4 untergebracht. Diese hat eine zum Mittelteil 3 hin weisende Öffnung 27, durch die die Positionserfassungsmittel 16 hindurchragen können.The electromechanical connection device 24 is in one to the laterally oriented outer surface 25 of the housing cover 4 accommodated open recess 26 of the housing cover 4. This has one pointing towards the middle part 3 Opening 27 through which the position detection means 16 protrude can.

Die elektromechanische Anschlusseinrichtung 24 verfügt beim Ausführungsbeispiel über ein in der Aufnahmevertiefung 26 sitzendes buchsenartiges Gehäuseteil 28, das am Innenumfang mit einem als Innengewinde ausgebildeten Schraubgewinde 32 ausgestattet ist. Im Vergleich zu einer Bauform mit einem Außengewinde ermöglicht die gewählte Ausgestaltung eine einfachere Herstellung und Montage mit sehr kompakten Abmessungen.The electromechanical connection device 24 has the Embodiment of a in the receiving recess 26th seated socket-like housing part 28, the inner circumference with a screw thread 32 designed as an internal thread Is provided. Compared to a design with an external thread the chosen design enables a simpler one Production and assembly with very compact dimensions.

Das an der elektrischen Leiteranordnung 22 vorgesehene Anschlussteil 23 ist mit einem drehbaren Schraubelement 33 ausgestattet, das über ein Außengewinde verfügt, mit dem es in das Schraubgewinde 32 der Anschlusseinrichtung 24 von außen her einschraubbar ist, um die gewünschte mechanische Befestigung zu erhalten.The connection part provided on the electrical conductor arrangement 22 23 is equipped with a rotatable screw element 33, which has an external thread with which it can be used the screw thread 32 of the connection device 24 from the outside can be screwed in here to achieve the desired mechanical fastening to obtain.

Für die elektrische Kontaktierung ist die in den Gehäusedeckel 4 integrierte Anschlusseinrichtung 24 mit innerhalb des Gehäuseteils 29 vorgesehenen Steckkontakten 34 ausgestattet, die mit am Anschlussteil 23 vorgesehenen Steckbuchsen 35 eine Steckverbindung eingehen können. Es versteht sich, dass die Anordnung stiftartiger Steckkontakte 34 und komplementärer Steckbuchsen 35 auch umgekehrt gewählt werden kann.For the electrical contact is in the housing cover 4 integrated connection device 24 with inside the Provided housing part 29 provided plug contacts 34, the sockets 35 provided on the connecting part 23 a Plug connection can enter. It is understood that the Arrangement of pin-like plug contacts 34 and complementary Sockets 35 can also be selected vice versa.

Das Anschließen des Anschlussteils 23 an die Anschlusseinrichtung 24 ist ein kombinierter Steck-Schraub-Vorgang. Die elektrische Verbindung wird durch einen Steckvorgang hergestellt, die mechanische Verbindung durch einen Schraubvorgang.The connection of the connection part 23 to the connection device 24 is a combined plug-screw process. The electrical connection is made by a plug-in process, the mechanical connection by a screwing process.

Anstelle der elektrischen Steckkontakte könnten alternativ auch Berührkontakte eingesetzt werden.Instead of the electrical plug contacts could alternatively touch contacts can also be used.

Die geschilderte Bauweise ermöglicht die Realisierung eines Schraubgewindes 32 der elektromechanischen Anschlusseinrichtung 24 mit Abmessungen kleiner als M8. Beispielsweise kann ein M6-Gewinde verwendet werden. Auf diese Weise besteht die Möglichkeit, auch relativ klein bauende Linearantriebe 1 mit der erfindungsgemäßen Anordnung auszustatten.The construction described allows the realization of a Screw thread 32 of the electromechanical connection device 24 with dimensions smaller than M8. For example an M6 thread can be used. In this way there is Possibility of using also relatively small linear drives 1 to equip the arrangement according to the invention.

Claims (8)

  1. Linear drive with a housing (2) containing a tubular centre section (3) and two housing covers (4, 5) arranged at the end faces, with position detecting means (16) mounted in the housing (2), and with an electro-mechanical connection device (24) forming a unit with the position detecting means (16), located in the area of at least one of the housing covers (4, 5) and provided for the releasable connection to the position detecting means (16) of an electrical conductor array (22) led from the outside to a sideways oriented outer surface (25) of the housing cover (25), wherein the electro-mechanical connection device (24) is accommodated, without overhanging the sideways oriented outer surface (25), completely recessed in a locating recess (26) of the housing cover (4) which is open towards this outer surface (25), characterised in that the electro-mechanical connection device (24) is located in the area of the sideways oriented outer surface (25) of the housing cover (25), wherein it is mounted flush with this side outer surface (25), and that the position detecting means (16) are inserted from the housing cover (4, 5) into a locating recess (17) in the wall of the centre section (3).
  2. Linear drive according to claim 1, characterised in that the electro-mechanical connection device (24) has plug contacts (34) for the electrical contacting of a connection element (23) connected to the electrical conductor array (22).
  3. Linear drive according to claim 1 or 2, characterised in that the electro-mechanical connection device (24) has a screw thread (32) for the mechanical fastening of a connection element (32) connected to the electrical conductor array (22).
  4. Linear drive according to claim 3, characterised in that the screw thread (32) is an internal thread.
  5. Linear drive according to claim 3 or 4, characterised in that the screw thread (32) is a thread smaller than M8, in particular an M6 thread.
  6. Linear drive according to any of claims 1 to 5, characterised in that the position detecting means (16) are formed by a position sensor or a position measuring system.
  7. Linear drive according to any of claims 1 to 6, characterised in that there is accommodated in the housing (2), with linear sliding capability, a piston (8) which has actuating means (18) for activating the position detecting means (16).
  8. Linear drive according to any of claims 1 to 7, characterised by being designed as a fluid-actuated linear drive.
EP02006141A 2001-04-10 2002-03-19 Position sensor for linear actuator Expired - Fee Related EP1249620B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20106298U DE20106298U1 (en) 2001-04-10 2001-04-10 linear actuator
DE20106298U 2001-04-10

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EP1249620A1 EP1249620A1 (en) 2002-10-16
EP1249620B1 true EP1249620B1 (en) 2004-05-12

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EP02006141A Expired - Fee Related EP1249620B1 (en) 2001-04-10 2002-03-19 Position sensor for linear actuator

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US (1) US6533596B2 (en)
EP (1) EP1249620B1 (en)
DE (2) DE20106298U1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20014353U1 (en) 2000-08-19 2000-12-07 Festo AG & Co, 73734 Esslingen linear actuator
DE20116564U1 (en) * 2001-10-09 2002-01-17 Festo Ag & Co Position sensing device
US7552671B2 (en) * 2002-01-04 2009-06-30 Parker-Hannifin Corporation Cylinder with fiber optical position sensing device and method
US6834574B2 (en) * 2002-01-04 2004-12-28 Parker-Hannifin Corporation Cylinder with optical position sensing device and method
DE20205132U1 (en) 2002-04-03 2002-06-27 FESTO AG & Co., 73734 Esslingen Drive device for linear movements and associated position detection means
DE20205485U1 (en) 2002-04-10 2002-07-11 Festo Ag & Co Electronics assembly, especially sensor
DE10329045B4 (en) * 2003-06-27 2006-04-20 Rexroth Mecman Gmbh Means for determining at least one end position of a drive member, in particular a fluid-operated linear or rotary drive
DE102005059984A1 (en) * 2005-12-13 2007-06-14 Zf Friedrichshafen Ag Piston-cylinder assembly, has retainer for sensor device which is component part of housing fixed on outside of cylinder whereby sensor device is supported in housing by swiveling joint
US9182252B2 (en) 2008-05-16 2015-11-10 Parker Hannifin Corporation Probe for determining an absolute position of a rod of a cylinder

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CA1196708A (en) * 1982-05-10 1985-11-12 Eugenio Espiritu Santo Position sensing cylinder
JPH02259403A (en) * 1989-03-30 1990-10-22 Kubota Ltd Capacitance type stroke sensor
DE3923063C3 (en) 1989-04-08 1998-06-10 Festo Ag & Co Piston-cylinder unit
US5378882A (en) * 1992-09-11 1995-01-03 Symbol Technologies, Inc. Bar code symbol reader with locking cable connector assembly
DE29508517U1 (en) * 1995-05-23 1995-08-10 Festo Kg, 73734 Esslingen Rodless linear actuator
DE29816156U1 (en) * 1998-09-09 1998-11-26 Festo AG & Co, 73734 Esslingen linear actuator
FR2794236B1 (en) * 1999-05-26 2006-06-16 Serta DEVICE FOR KNOWING THE POSITION AND FOR MEASURING THE MOVEMENT OF THE PISTON OR PISTON ROD IN THE CHAMBER OF A CYLINDER OF THE TYPE COMPRISING A LINEAR RECTILINE LINEAR POTENTIOMETRY SENSOR
DE20014353U1 (en) 2000-08-19 2000-12-07 Festo AG & Co, 73734 Esslingen linear actuator

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Publication number Publication date
DE20106298U1 (en) 2001-06-21
US6533596B2 (en) 2003-03-18
EP1249620A1 (en) 2002-10-16
US20020146939A1 (en) 2002-10-10
DE50200422D1 (en) 2004-06-17

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