EP1253329B1 - Pressure fluid actuator with means for preventing rotation - Google Patents
Pressure fluid actuator with means for preventing rotation Download PDFInfo
- Publication number
- EP1253329B1 EP1253329B1 EP02006632A EP02006632A EP1253329B1 EP 1253329 B1 EP1253329 B1 EP 1253329B1 EP 02006632 A EP02006632 A EP 02006632A EP 02006632 A EP02006632 A EP 02006632A EP 1253329 B1 EP1253329 B1 EP 1253329B1
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- EP
- European Patent Office
- Prior art keywords
- pressure cylinder
- adapter ring
- piston
- piston element
- cylinder according
- 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.)
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Classifications
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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
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1414—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston
Definitions
- the invention relates to a pressure cylinder with an anti-rotation device, in Essentially consisting of a pressure medium cylinder tube with a non-circular one Internal cross section in which one end coaxially connected to a piston rod standing piston element is housed.
- Such pressure medium cylinders are used in particular in automation technology applied in many ways to a linear actuating force via a pressurization of the To generate piston element. Both a Hydraulic fluid as well as compressed air can be used.
- a generic pressure cylinder is known from DE 24 31 706 Al.
- the Pressure medium cylinder tube has a polygonal inner cross section, which with a Correspondingly designed pistons to form an anti-rotation device for the same outgoing piston rod cooperates. Due to the polygonal shape ensures that a torque acting on the piston rod does not cause twisting the piston rod guides what is required for certain registration cases.
- the piston rod itself is secured against rotation with a non-circular cross-section to execute, which then to prevent rotation via a corresponding sealing arrangement with a correspondingly designed opening within the cylinder cover of the Pressure cylinder cooperates.
- the pressure medium cylinder tube and the inner one Pistons can then be circular in a conventional manner.
- the piston rod usually has a polygonal or elliptical cross-sectional shape.
- Pressure medium cylinders generally known solution are two circular cross-sectional Piston rods are used, both of which are attached to the piston and spaced in parallel are guided through corresponding openings in the cylinder cover.
- Pressure medium cylinder tube and the internal piston in turn a circular Preserve cross section.
- the pressure medium cylinder tube essentially has one square cross-section and acts with a correspondingly shaped Piston element together.
- a piston rod is coaxial on the piston element by means of a Screw connection fastened. It is disadvantageous that this is secured against rotation Pressure medium cylinder can not be brought into an operating state that is not secured against rotation.
- pressure medium cylinders are usually in a non-rotation-proof as well as in offered a non-rotating variant to get out of it depending on the intended To be able to make an appropriate selection. So these two variants Appropriately trained variant-specific components can be provided required. This is usually the case with the non-rotating variant of a pressure medium cylinder the pressure medium cylinder tube and the corresponding piston are non-circular to design, whereas in the non-rotation-proof variant the conventional one circular cross section is used. There are also the ones used Adjust sealing elements and other small parts accordingly.
- the task is based on a pressure cylinder according to the preamble of Claim 1 solved in conjunction with its characterizing features.
- the dependent Claims reflect advantageous developments of the invention.
- the invention includes the technical teaching that a piston element of the Pressure cylinder has a circular cross-section and one of them connected but rotatable with respect to the piston element adapter ring element corresponding circular inner surface is surrounded, the outer Shell surface in turn corresponds to the non-circular inner cross section of the Pressure medium cylinder tube is shaped, with a means for locking the Adapter ring element is provided on the piston element.
- the anti-rotation lock should be removed are a non-rotation-proof variant of the pressure cylinder
- To provide is the means for locking the adapter ring element on the piston element just to solve.
- the function-integrated design of the invention Pressure cylinder reduces the number of components required for provision both variants considerably.
- the means for locking the adapter ring element to the piston element formed in the manner of a pin which in a radial through the piston element and the Corresponding pin bore extending adapter ring element is pluggable.
- the means for locking the adapter ring element on the piston element according to Art form at least one screw in a threaded bore on the piston element can be screwed in to clamp the adapter ring element.
- the threaded hole can also be attached in an analogous manner on the part of the adapter ring element.
- Others, too Means known to those skilled in the art to act in a positive or non-positive manner Locks can be used at this point.
- the adapter ring element Can be rotated in a form-fitting manner via a groove-shaped outer radial recess on the piston element arranged.
- This positive connection of both components is easy to manufacture and allows good rotation of the adapter ring element, while at the same time a relative axial movement is effectively avoided.
- the piston element can be constructed with two shells, with the separation in the area of groove-shaped recess is provided. Alternatively, it is also conceivable that The adapter ring element must be designed in two parts.
- the adapter ring element is preferably made of plastic and is injection molded manufactured. At least one can be made in the adapter ring element during manufacture Permanent magnet are cast in order to detect the piston position by means of a to ensure the inductive sensor attached to the outside of the pressure cylinder tube.
- at least one on the outside of the pressure medium cylinder tube to be integrally formed axially parallel fastening web, in order to such Sensor or a valve to act on the pressure medium cylinder immediately detachable Fasten.
- the web-like design of the attachment has a groove-like Training has the advantage that dirt is more difficult to attach to it than inside of grooves. This aspect is particularly important when the pressure cylinder is used of importance in the food industry, where strict hygiene regulations must be observed.
- a further measure which improves the invention, is in the range between the Piston element and the inner wall of the pressure medium cylinder tube at least one in Essentially annular sealing element arranged, which is dynamically sealing with the Interacts inner wall of the pressure medium cylinder tube and in this respect one on the non-circular Cross section adapted to the outer contour.
- the sealing element is internal radial circular to allow rotation relative to the piston element.
- there can be exactly two axially spaced apart on the piston element annular sealing elements are provided which axially the adapter ring element include, and together for dynamic sealing a double-sided Form lip seal.
- This arrangement is particularly compact Structure made of, due to the double-sided lip seal excellent dynamic Sealing properties can be achieved. That enables a relative twist and interaction of the sealing element on the piston element which offers a simultaneous hold is advantageously carried out on a circumferential retaining ring or a retaining groove Piston element.
- the pressure medium cylinder shown has a pressure medium cylinder tube 1 in which a Piston element 2 is arranged to be longitudinally displaceable. One goes from the piston element 2 Piston rod 3 from.
- the pressure medium cylinder tube 1 here consists of an extruded one Hollow profile made of metal and has an octagonal inner cross-section.
- the Pressure medium cylinder tube 1 corresponds to the piston element 2 via a rotatable Adapter ring element 4, the outer lateral surface 5 corresponding to the octagonal Inner cross section of the pressure medium cylinder tube 1 is formed.
- the adapter ring element 4 is positively via a groove-shaped outer radial recess on the piston element 2 held rotatable.
- the piston element 2 here consists of two identical half-shells and is one Screw 6 is connected at the end to the piston rod 3.
- a Permanent magnet 7 integrated in the adapter ring element 4 , so that reliable detection of the piston position by means of a sensor attached to the outside of the pressure medium cylinder tube 1 (not shown here) is possible.
- two annular sealing elements 8a, 8b arranged in the area between the piston element 4 on the one hand and the Inner wall of the pressure medium cylinder tube 1, on the other hand.
- the sealing elements 8a, 8b are form-fitting via a circumferential one Retaining ring 9 axially spaced on the piston element 4 rotatably attached.
- the sealing elements 8a, 8b come sealingly against the inner wall of the pressure medium cylinder tube 1 this area molded sealing lips to the system and have a non-circular here Outside cross section on. Both sealing rings 8a, 8b together form one double-sided lip seal.
- a non-rotating variant can block this relative rotatability.
- a pin 10 is provided, which extends radially through the piston element 2 on the one hand and the adapter ring element 4 on the other hand corresponding ones Pin hole is inserted.
- the pressure medium cylinder tube 1 has a plurality of bores 11 on its end face equipped, by means of self-tapping screws the attachment of the - not here shown - cylinder bottom element or the cylinder cover element takes place.
- Farther are on the outside of the pressure cylinder tube 1 two axially parallel to the main axis of the Pressure medium cylinder tube 1 extending mounting webs 12a, 12b formed directly to if necessary, a sensor or a valve or the like can be releasably attached to it can.
- Such fastening webs 12a, 12b can also on other side surfaces of the Pressure medium cylinder tube 1 are provided.
- the pressure medium cylinder itself is fixable here.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Description
Die Erfindung betrifft einen Druckmittelzylinder mit einer Verdrehsicherung, im Wesentlichen bestehend aus einem Druckmittelzylinderrohr mit nicht-kreisförmigem Innenquerschnitt, in dem ein endseitig mit einer Kolbenstange koaxial in Verbindung stehendes Kolbenelement untergebracht ist.The invention relates to a pressure cylinder with an anti-rotation device, in Essentially consisting of a pressure medium cylinder tube with a non-circular one Internal cross section in which one end coaxially connected to a piston rod standing piston element is housed.
Derartige Druckmittelzylinder werden insbesondere in der Automatisierungstechnik in vielfältiger Weise angewendet, um eine lineare Stellkraft über eine Druckbeaufschlagung des Kolbenelements zu erzeugen. Als Druckmittelzylinder kann hier sowohl eine Hydraulikflüssigkeit als auch Druckluft verwendet werden.Such pressure medium cylinders are used in particular in automation technology applied in many ways to a linear actuating force via a pressurization of the To generate piston element. Both a Hydraulic fluid as well as compressed air can be used.
Ein gattungsgemäßer Druckmittelzylinder ist aus der DE 24 31 706 Al bekannt. Das Druckmittelzylinderrohr hat einen mehreckigen Innenquerschnitt, der mit einem korrespondierend ausgestalteten Kolben zur Bildung einer Verdrehsicherung für die hiervon abgehende Kolbenstange zusammenwirkt. Durch die mehreckige Formgebung ist sichergestellt, dass ein an der Kolbenstange angreifendes Moment nicht zu einer Verdrehung der Kolbenstange führt, was für bestimmte Anmeldungsfälle erforderlich ist.A generic pressure cylinder is known from DE 24 31 706 Al. The Pressure medium cylinder tube has a polygonal inner cross section, which with a Correspondingly designed pistons to form an anti-rotation device for the same outgoing piston rod cooperates. Due to the polygonal shape ensures that a torque acting on the piston rod does not cause twisting the piston rod guides what is required for certain registration cases.
Weiterhin ist es im Stand der Technik allgemein bekannt, zum Zwecke einer derartigen Verdrehsicherung die Kolbenstange selbst mit einem nicht-kreisförmigen Querschnitt auszuführen, die dann zur Verdrehsicherung über eine entsprechende Dichtungsanordnung mit einem korrespondierend ausgestalteten Durchbruch innerhalb des Zylinderdeckels des Druckmittelzylinders zusammenwirkt. Das Druckmittelzylinderrohr sowie der innenliegende Kolben können dann in herkömmlicher Weise kreisförmig ausgebildet sein. Die Kolbenstange weist meist eine mehreckige oder elliptische Querschnittsform auf.Furthermore, it is generally known in the prior art for the purpose of such The piston rod itself is secured against rotation with a non-circular cross-section to execute, which then to prevent rotation via a corresponding sealing arrangement with a correspondingly designed opening within the cylinder cover of the Pressure cylinder cooperates. The pressure medium cylinder tube and the inner one Pistons can then be circular in a conventional manner. The piston rod usually has a polygonal or elliptical cross-sectional shape.
Gemäß einer weiteren im Stand der Technik zur Realisierung einer Verdrehsicherung bei Druckmittelzylindern allgemein bekannten Lösung werden zwei kreisquerschnittförmige Kolbenstangen verwendet, die beide parallel beabstandet am Kolben angebracht sind und durch entsprechende Durchbrüche im Zylinderdeckel geführt sind. Auch hier kann das Druckmittelzylinderrohr sowie der innenliegende Kolben wiederum einen kreisförmigen Querschnitt erhalten. According to another in the prior art for implementing an anti-rotation device Pressure medium cylinders generally known solution are two circular cross-sectional Piston rods are used, both of which are attached to the piston and spaced in parallel are guided through corresponding openings in the cylinder cover. Here too it can Pressure medium cylinder tube and the internal piston in turn a circular Preserve cross section.
Aus der JP 56 024 203 geht ein ebenfalls gattungsgemäßer verdrehgesicherter . Druckmittelzylinder hervor. Das Druckmittelzylinderrohr weist einen im Wesentlichen quadratischen Querschnitt auf und wirkt mit einem korrespondierend geformten Kolbenelement zusammen. Koaxial am Kolbenelement ist eine Kolbenstange mittels einer Schraubverbindung befestigt. Es ist von Nachteil, dass dieser verdrehgesicherte Druckmittelzylinder nicht in einem nicht-verdrehgesicherten Betriebszustand bringbar ist.From JP 56 024 203 there is also a generic anti-rotation device. Pressure cylinder. The pressure medium cylinder tube essentially has one square cross-section and acts with a correspondingly shaped Piston element together. A piston rod is coaxial on the piston element by means of a Screw connection fastened. It is disadvantageous that this is secured against rotation Pressure medium cylinder can not be brought into an operating state that is not secured against rotation.
In der Praxis werden Druckmittelzylinder meist in einer nicht-verdrehgesicherten sowie in einer verdrehgesicherten Variante angeboten, um hieraus je nach dem beabsichtigten Einsatzfall eine entsprechende Auswahl treffen zu können. Damit diese beiden Varianten bereitgestellt werden können, sind entsprechend ausgebildete variantenspezifische Bauteile erforderlich. So sind meist bei der verdrehgesicherten Variante eines Druckmittelzylinders das Druckmittelzylinderrohr und der korrespondierende Kolben nicht-kreisförmig auszugestalten, wogegen bei der nicht-verdrehgesicherten Variante der herkömmliche kreisförmige Querschnitt verwendet wird. Hierauf sind zudem die verwendeten Dichtelemente und andere Kleinteile entsprechend abzustimmen.In practice, pressure medium cylinders are usually in a non-rotation-proof as well as in offered a non-rotating variant to get out of it depending on the intended To be able to make an appropriate selection. So these two variants Appropriately trained variant-specific components can be provided required. This is usually the case with the non-rotating variant of a pressure medium cylinder the pressure medium cylinder tube and the corresponding piston are non-circular to design, whereas in the non-rotation-proof variant the conventional one circular cross section is used. There are also the ones used Adjust sealing elements and other small parts accordingly.
Es ist daher die Aufgabe der vorliegenden Erfindung, die in Folge einer verdrehgesicherten sowie nicht-verdrehgesicherten Variante eines Druckmittelzylinders entstehende Bauteilanzahl zu reduzieren.It is therefore the object of the present invention, which as a result of an anti-rotation as well as non-rotation-proof variant of a pressure medium cylinder To reduce the number of components.
Die Aufgabe wird ausgehend von einem Druckmittelzylinder gemäß dem Oberbegriff des
Anspruchs 1 in Verbindung mit dessen kennzeichnenden Merkmalen gelöst. Die abhängigen
Ansprüche geben vorteilhafte Weiterbildungen der Erfindung wieder.The task is based on a pressure cylinder according to the preamble of
Die Erfindung schließt die technische Lehre ein, dass ein Kolbenelement des Druckmittelzylinders einen kreisförmigen Querschnitt besitzt und von einem hiermit verbundenen, jedoch bezüglich des Kolbenelements verdrehbaren Adapterringelement mit korrespondierender kreisförmiger innerer Mantelfläche umgeben ist, dessen äußere Mantelfläche wiederum korrespondierend zum nicht-kreisförmigen Innenquerschnitt des Druckmittelzylinderrohrs geformt ist, wobei ein Mittel zum Arretieren des Adapterringelements am Kolbenelement vorgesehen ist.The invention includes the technical teaching that a piston element of the Pressure cylinder has a circular cross-section and one of them connected but rotatable with respect to the piston element adapter ring element corresponding circular inner surface is surrounded, the outer Shell surface in turn corresponds to the non-circular inner cross section of the Pressure medium cylinder tube is shaped, with a means for locking the Adapter ring element is provided on the piston element.
Der Vorteil einer derartigen Ausbildung eines Druckmittelzylinders liegt darin, dass nunmehr nur eine Baureihe erforderlich ist, um sowohl eine verdrehgesicherte als auch eine nicht-verdrehgesicherte Variante des Druckmittelzylinders zu realisieren. Soll der erfindungsgemäße Druckmittelzylinder eine verdrehgesicherte Eigenschaft haben, so ist lediglich in einfacher Weise das Adapterringelement am Kolbenelement zu arretieren, so dass eine Relativbewegung zwischen beiden Bauteilen nicht mehr möglich ist und infolge des nicht-kreisförmigen Innenquerschnitts des Druckmittelzyinderrohrs, der mit dem korrespondierend ausgebildeten, fest auf dem Kolbenelement sitzenden Adapterringelement zusammenwirkt, die Verdrehsicherung erfolgt. Soll die Verdrehsicherung aufgehoben werden, um insoweit eine nicht-verdrehgesicherte Variante des Druckmittelzylinders bereitzustellen, so ist das Mittel zum Arretieren des Adapterringelementes am Kolbenelement lediglich zu lösen. Die erfindungsgemäße funktionsintegrierte Bauweise des Druckmittelzylinders reduziert die Anzahl der erforderlichen Bauteile zur Bereitstellung beider Varianten erheblich.The advantage of such a design of a pressure medium cylinder is that now only one series is required to include both a non-rotating and a non-rotating Realize variant of the pressure medium cylinder. Should he Pressure fluid cylinders according to the invention have a non-rotating property, is to simply lock the adapter ring element on the piston element, so that a relative movement between the two components is no longer possible and as a result of non-circular inner cross section of the pressure medium cylinder, which with the Correspondingly designed adapter ring element firmly seated on the piston element cooperates, the anti-rotation is done. The anti-rotation lock should be removed are a non-rotation-proof variant of the pressure cylinder To provide, is the means for locking the adapter ring element on the piston element just to solve. The function-integrated design of the invention Pressure cylinder reduces the number of components required for provision both variants considerably.
Vorzugsweise ist das Mittel zum Arretieren des Adapterringelements zum Kolbenelement nach Art eines Stifts ausgebildet, der in eine radial durch das Kolbenelement sowie das Adapterringelement verlaufende korrespondierende Stiftbohrung steckbar ist. Einen optimalen Kompromiss zwischen der Haltbarkeit der Verdrehsicherung gegenüber eines an der Kolbenstange angreifenden Moments einerseits und dem hiermit verbundenen Bauteileaufwand andererseits stellt die Anordnung genau zweier Stifte innerhalb einander beabstandet angeordneter korrespondierender Stiftbohrungen dar. Daneben ist es auch denkbar, das Mittel zum Arretieren des Adapterringelements am Kolbenelement nach Art mindestens einer Schraube auszubilden, die in eine Gewindebohrung am Kolbenelement einschraubbar ist, um das Adapterringelement zu klemmen. Die Gewindebohrung kann auch in analoger Weise seitens des Adapterringelements angebracht sein. Auch andere, dem Fachmann allgemein bekannte formschlüssig oder kraftschlüssig wirkende Mittel zum Arretieren können an dieser Stelle eingesetzt werden.Preferably, the means for locking the adapter ring element to the piston element formed in the manner of a pin which in a radial through the piston element and the Corresponding pin bore extending adapter ring element is pluggable. a optimal compromise between the durability of the anti-rotation device compared to one the torque acting on the piston rod on the one hand and the associated torque Component effort on the other hand, the arrangement of exactly two pins within each other corresponding pin holes spaced apart. It is also next to it conceivable, the means for locking the adapter ring element on the piston element according to Art form at least one screw in a threaded bore on the piston element can be screwed in to clamp the adapter ring element. The threaded hole can also be attached in an analogous manner on the part of the adapter ring element. Others, too Means known to those skilled in the art to act in a positive or non-positive manner Locks can be used at this point.
Gemäß einer weiteren, die Erfindung verbessernden Maßnahme ist das Adapterringelement über eine nutförmige außenradiale Ausnehmung am Kolbenelement formschlüssig verdrehbar angeordnet. Diese formschlüssige Verbindung beider Bauteile ist einfach herzustellen und gestattet eine gute Verdrehbarkeit des Adapterringelementes, wobei gleichzeitig eine relative axiale Bewegung wirkungsvoll vermieden wird. Um eine einfache Montage des Adapterringelements in die nutförmige Ausnehmung am Kolbenelement zu ermöglichen, kann das Kolbenelement zweischalig aufgebaut sein, wobei die Trennung im Bereich der nutförmigen Ausnehmung vorgesehen ist. Alternativ hierzu ist es auch denkbar, das Adapterringelement entsprechend zweiteilig auszuführen.According to a further measure improving the invention, the adapter ring element Can be rotated in a form-fitting manner via a groove-shaped outer radial recess on the piston element arranged. This positive connection of both components is easy to manufacture and allows good rotation of the adapter ring element, while at the same time a relative axial movement is effectively avoided. In order to easily assemble the To enable adapter ring element in the groove-shaped recess on the piston element, The piston element can be constructed with two shells, with the separation in the area of groove-shaped recess is provided. Alternatively, it is also conceivable that The adapter ring element must be designed in two parts.
Das Adapterringelement besteht vorzugsweise aus Kunststoff und ist im Spritzgießverfahren hergestellt. Bei der Herstellung kann in das Adapterringelement mindestens ein Permanentmagnet eingegossen werden, um eine Detektion der Kolbenstellung mittels eines außen am Druckmittelzylinderrohr angebrachten induktiven Sensors zu gewährleisten. Vorteilhafterweise kann außen am Druckmittelzylinderrohr weiterhin mindestens ein achsparallel verlaufender Befestigungssteg angeformt zu sein, um hieran einen solchen Sensor oder ein Ventil zur Beaufschlagung des Druckmittelzylinders unmittelbar lösbar zu befestigen. Die stegartige Ausbildung der Befestigung hat gegenüber einer nutartigen Ausbildung den Vorteil, dass sich Verschmutzungen hieran schwerer festsetzen als innerhalb von Nuten. Dieser Aspekt gewinnt insbesondere bei einem Einsatz des Druckmittelzylinders in der Lebensmittelindustrie an Bedeutung, wo strenge Hygienevorschriften zu beachten sind.The adapter ring element is preferably made of plastic and is injection molded manufactured. At least one can be made in the adapter ring element during manufacture Permanent magnet are cast in order to detect the piston position by means of a to ensure the inductive sensor attached to the outside of the pressure cylinder tube. Advantageously, at least one on the outside of the pressure medium cylinder tube to be integrally formed axially parallel fastening web, in order to such Sensor or a valve to act on the pressure medium cylinder immediately detachable Fasten. The web-like design of the attachment has a groove-like Training has the advantage that dirt is more difficult to attach to it than inside of grooves. This aspect is particularly important when the pressure cylinder is used of importance in the food industry, where strict hygiene regulations must be observed.
Gemäß einer weiteren, die Erfindung verbessernden Maßnahme ist im Bereich zwischen dem Kolbenelement und der Innenwandung des Druckmittelzylinderrohrs mindestens ein im Wesentlichen ringförmiges Dichtelement angeordnet, welches dynamisch dichtend mit der Innenwandung des Druckmittelzylinderrohrs zusammenwirkt und insoweit eine an den nicht-kreisförmigen Querschnitt angepasste Außenkontur besitzt. Innenradial ist das Dichtelement kreisförmig ausgebildet, um eine Verdrehung relativ zum Kolbenelement zu ermöglichen. Speziell können hierfür genau zwei auf dem Kolbenelement axial beabstandet angeordnete ringförmige Dichtelemente vorgesehen werden, die das Adapterringelement axial einschließen, und die zur dynamischen Abdichtung gemeinsam eine doppelseitige Lippendichtung bilden. Diese Anordnung zeichnet sich durch einen besonders kompakten Aufbau aus, wobei infolge der doppelseitigen Lippendichtung hervorragende dynamische Dichtungseigenschaften erzielt werden. Das eine relative Verdrehung ermöglichende und einen gleichzeitigen Halt bietende Zusammenwirken des Dichtelements am Kolbenelement erfolgt vorteilhafterweise über einen umlaufenden Haltering oder eine Haltenut am Kolbenelement.According to a further measure, which improves the invention, is in the range between the Piston element and the inner wall of the pressure medium cylinder tube at least one in Essentially annular sealing element arranged, which is dynamically sealing with the Interacts inner wall of the pressure medium cylinder tube and in this respect one on the non-circular Cross section adapted to the outer contour. The sealing element is internal radial circular to allow rotation relative to the piston element. Specifically, there can be exactly two axially spaced apart on the piston element annular sealing elements are provided which axially the adapter ring element include, and together for dynamic sealing a double-sided Form lip seal. This arrangement is particularly compact Structure made of, due to the double-sided lip seal excellent dynamic Sealing properties can be achieved. That enables a relative twist and interaction of the sealing element on the piston element which offers a simultaneous hold is advantageously carried out on a circumferential retaining ring or a retaining groove Piston element.
Weitere, die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung anhand der Figuren näher dargestellt. Es zeigt:
Figur 1- einen Längsschnitt durch einen erfindungsgemäß ausgebildeten Druckmittelzylinder, und
Figur 2- einen Querschnitt durch den Druckmittelzylinder gemäß
Figur 1 entlang des Schnitts D-D.
- Figure 1
- a longitudinal section through a pressure medium cylinder designed according to the invention, and
- Figure 2
- a cross section through the pressure medium cylinder according to Figure 1 along the section DD.
Der in der Figur 1 größtenteils (ohne Zylinderbodenelement sowie Zylinderdeckelelement)
dargestellte Druckmittelzylinder besitzt ein Druckmittelzylinderrohr 1, in dem ein
Kolbenelement 2 längsverschiebbar angeordnet ist. Vom Kolbenelement 2 geht eine
Kolbenstange 3 ab. Das Druckmittelzylinderrohr 1 besteht hier aus einem extrudierten
Hohlprofil aus Metall und weist einen achteckigen Innenquerschnitt auf. Das
Druckmittelzylinderrohr 1 korrespondiert mit dem Kolbenelement 2 über ein verdrehbares
Adapterringelement 4, dessen äußere Mantelfläche 5 korrespondierend zum achteckigen
Innenquerschnitt des Druckmittelzylinderrohres 1 geformt ist. Das Adapterringelement 4 ist
über eine nutförmige außenradiale Ausnehmung am Kolbenelement 2 formschlüssig
verdrehbar gehalten.For the most part in FIG. 1 (without cylinder base element and cylinder cover element)
The pressure medium cylinder shown has a pressure
Das Kolbenelement 2 besteht hier aus zwei identischen Halbschalen und ist über eine
Schraube 6 endseitig mit der Kolbenstange 3 verbunden. In dem Adapterringelement 4 ist ein
Permanentmagnet 7 integriert, so dass eine zuverlässige Detektion der Kolbenstellung mittels
eines außen am Druckmittelzylinderrohr 1 angebrachten (hier nicht dargestellten) Sensors
möglich ist. Weiterhin sind im Bereich zwischen dem Kolbenelement 4 einerseits und der
Innenwandung des Druckmittelzylinderrohres 1 andererseits zwei ringförmige Dichtelemente
8a, 8b angeordnet. Die Dichtelemente 8a, 8b sind formschlüssig über einen umlaufenden
Haltering 9 axial beabstandet am Kolbenelement 4 verdrehbar befestigt. Die Dichtelemente
8a, 8b kommen dichtend an der Innenwandung des Druckmittelzylinderrohres 1 über in
diesem Bereich angeformte Dichtlippen zur Anlage und weisen insoweit hier einen nicht-kreisförmigen
Außenquerschnitt auf. Beide Dichtringe 8a, 8b bilden gemeinsam eine
doppelseitige Lippendichtung.The
Durch die vorstehend beschriebene bauliche Anordnung ist trotz des nicht-kreisförmigen
Innenquerschnitts des Druckmittelzylinderrohres 1 die Kolbenstange 3 bei einem hieran
angreifenden Moment drehbar, weil eine Relativbewegung zwischen dem Kolbenelement 2
und dem hierauf verdrehbaren Adapterringelement 4 möglich ist. Für eine Umrüstung auf
eine verdrehgesicherte Variante kann diese relative Verdrehbarkeit blockiert werden. Zu
diesem Zwecke ist ein Stift 10 vorgesehen, der in eine radial durch das Kolbenelement 2
einerseits sowie das Adapterringelement 4 andererseits verlaufende korrespondierende
Stiftbohrung gesteckt wird.Due to the structural arrangement described above, despite the non-circular
Inner cross section of the pressure
Gemäß Figur 2 sind hierfür aus Gründen einer optimalen Belastungsverteilung genau zwei
Stifte 10', 10" vorgesehen, welche einander beabstandet gegenüberliegend angeordnet sind.
Das Druckmittelzylinderrohr 1 ist an seiner Stirnfläche mit mehreren Bohrungen 11
ausgestattet, worüber mittels selbstschneidender Schrauben die Befestigung des - hier nicht
dargestellten - Zylinderbodenelements bzw. des Zylinderdeckelelements erfolgt. Weiterhin
sind außen am Druckmittelzylinderrohr 1 zwei achsparallel zur Hauptachse des
Druckmittelzylinderrohres 1 verlaufende Befestigungsstege 12a, 12b direkt angeformt, um
hieran gegebenenfalls einen Sensor oder ein Ventil oder dergleichen lösbar befestigen zu
können. Derartige Befestigungsstege 12a, 12b können auch an anderen Seitenflächen des
Druckmittelzylinderrohres 1 vorgesehen werden. Auch der Druckmittelzylinder selbst ist
hierüber fixierbar.According to FIG. 2, there are exactly two for reasons of optimal
Die Erfindung ist nicht beschränkt auf das vorstehend angegebene bevorzugte Ausführungsbeispiel. Es sind vielmehr auch Abwandlungen hiervon denkbar, welche vom Schutzbereich der nachfolgenden Ansprüche Gebrauch machen. Insbesondere ist die vorliegende Erfindung nicht beschränkt auf den in der Zeichnung dargestellten, doppeltwirkenden Druckmittelzylinder mit einer Kolbenstange. Es ist auch denkbar, beidseitig des Kolbens eine Kolbenstange anzubringen oder den Druckmittelzylinder einfachwirkend auszubilden. The invention is not limited to the preferred one specified above Embodiment. Rather, modifications of this are also conceivable, which of Make use of the scope of protection of the following claims. In particular, the present invention not limited to that shown in the drawing, double-acting pressure medium cylinder with a piston rod. It is also conceivable to attach a piston rod or the pressure medium cylinder on both sides of the piston train single-acting.
- 11
- DruckmittelrohrPressure fluid pipe
- 22
- Kolbenelementpiston element
- 33
- Kolbenstangepiston rod
- 44
- AdapterringelementAdapter ring member
- 55
- Mantelflächelateral surface
- 66
- Schraubescrew
- 77
- Permanentmagnetpermanent magnet
- 88th
- Dichtelementsealing element
- 99
- Halteringretaining ring
- 1010
- Stiftpen
- 1111
- Bohrungdrilling
- 1212
- Befestigungsstegfastening web
Claims (13)
- A pressure cylinder having an anti-rotation safeguard, essentially comprising a pressure medium tube (1) with a non-circular inner cross-section, in which a piston element (2) coaxially connected to a piston rod (3) at its end is accommodated in a sealing relationship,
characterized in that said piston element (2) has a circular cross-section and is surrounded by an adapter ring element (4) connected therewith, however rotatable with respect to the piston element (2), the adapter ring element (4) having a corresponding circular inner lateral surface and having an outer lateral surface (5) formed to as to conform to the non-circular inner cross-section of the pressure cylinder tube (1), wherein a releasable means for locking said adapter ring element (4) on said piston element (2) is provided in order to realize both an anti-rotation secured and a non-anti-rotation secured variant. - The pressure cylinder according to claim 1,
characterized in that said means for locking said adapter ring element (4) on said piston element (2) is configured as a pin (10) which is insertable in a corresponding pin bore radially extending through said piston element (2) and through said adapter ring element (4) in order to prevent a rotation of said adapter ring element (4) relative to said piston element (2). - The pressure cylinder according to claim 2,
characterized in that, for locking said adapter ring element (4) on said piston element (2), exactly two pins (10', 10") are provided with pin bores correspondingly spaced. - The pressure cylinder according to claim 1,
characterized in that said means for locking said adapter ring element (4) on said piston element (2) is configured as a screw which may be screwed in a threaded bore in said piston element (2) in order to clamp said adapter ring element (4). - The pressure cylinder according to claim 1,
characterized in that said adapter ring element (4) is arranged on said piston element (2) rotatable in positive engagement therewith via an outside, radially extending groove-shaped recess. - The pressure cylinder according to claim 1,
characterized in that at least one permanent magnet is integrated within said adapter ring element (4) in order to ensure detection of the position of said piston by means of an inductive sensor mounted on the outside of said pressure cylinder tube (1). - The pressure cylinder according to claim 1,
characterized in that in the area between said piston element (2) and said inner wall of said pressure cylinder tube (1) at least one essentially ring-shaped sealing element (8a, 8b) is positioned which is rotatably held on said piston element (2) and cooperates in a dynamically sealing relationship with the inner wall of said pressure cylinder tube (1). - The pressure cylinder according to claim 7,
characterized in that exactly two ring-shaped sealing elements (8a, 8b) are provided in an axially spaced relationship on said piston element (2) and that said sealing elements (8a, 8b) enclose said adapter ring element (4) and together form a double-sided lip seal for dynamic sealing. - The pressure cylinder according to claim 7,
characterized in that a positive connection of said sealing element (8a, 8b) on said piston element (2) ensuring rotatability is realized by a circumferential retaining ring (9) or a retaining groove on said piston element (2). - The pressure cylinder according to any one of the preceding claims,
characterized in that said pressure cylinder tube (1) is an extruded plastic or metal tubular section. - The pressure cylinder according to claim 10,
characterized in that, on the outside of said pressure cylinder (1), at least one attachment web (12a, 12b) is formed integrally in an axis-parallel relationship, in order to releasably attach a sensor or a valve thereto. - The pressure cylinder according to claim 10,
characterized in that said pressure cylinder tube (1) is equipped with a plurality of through holes (11) at both end faces for the purpose of attaching a cylinder base element or a cylinder cover element, respectively, by means of self-tapping screws. - The pressure cylinder according to any one of the preceding claims,
characterized in that said adapter ring (4) is injection moulded of plastic material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10120026A DE10120026C2 (en) | 2001-04-24 | 2001-04-24 | Pressure cylinder with an anti-rotation device |
| DE10120026 | 2001-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1253329A1 EP1253329A1 (en) | 2002-10-30 |
| EP1253329B1 true EP1253329B1 (en) | 2004-08-25 |
Family
ID=7682514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02006632A Expired - Fee Related EP1253329B1 (en) | 2001-04-24 | 2002-03-25 | Pressure fluid actuator with means for preventing rotation |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6637316B2 (en) |
| EP (1) | EP1253329B1 (en) |
| DE (2) | DE10120026C2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8544699B2 (en) * | 2010-01-12 | 2013-10-01 | Graco Minnesota Inc. | Non-rotating single post ram for inductor pump |
| US8308800B2 (en) | 2010-04-09 | 2012-11-13 | Chu Milton W | Intraocular lenses with high contrast haptics, materials, and methods |
| DE102010024847A1 (en) * | 2010-06-23 | 2011-12-29 | Thyssenkrupp Presta Ag | Rotationally supported steering spindle |
| DE102011080502B4 (en) * | 2011-08-05 | 2015-03-12 | Schunk Gmbh & Co. Kg Spann- Und Greiftechnik | Clamping device and pallet handling system |
| DE102011080504B4 (en) * | 2011-08-05 | 2020-10-15 | Schunk Gmbh & Co. Kg Spann- Und Greiftechnik | Clamping device and pallet handling system |
| US20130180813A1 (en) * | 2012-01-13 | 2013-07-18 | Eustace Moore, JR. | Fluid-filled shock absorber |
| US9277988B1 (en) | 2013-03-15 | 2016-03-08 | Milton W. Chu | Intraocular lenses with quantum dots |
| BR112017006747A2 (en) * | 2014-10-02 | 2018-07-03 | Smc Corporation | fluidic cylinder |
| KR20180086274A (en) | 2015-12-18 | 2018-07-30 | 그라코 미네소타 인크. | Bellows pressure relief valve |
| EP3390824B1 (en) * | 2015-12-18 | 2020-09-30 | Graco Minnesota Inc. | Bellows anti-rotation construction |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3180236A (en) * | 1962-12-20 | 1965-04-27 | Beckett Harcum Co | Fluid motor construction |
| DE2431706A1 (en) * | 1974-07-02 | 1976-01-22 | Festo Maschf Stoll G | WORKING CYLINDERS FOR PNEUMATIC AND HYDRAULIC MEDIA |
| JPS5610804A (en) * | 1979-07-05 | 1981-02-03 | Norioki Kuwabara | Cylinder device |
| JPS5624203A (en) * | 1979-07-31 | 1981-03-07 | Norioki Kuwabara | Cylinder device |
| DE3241233A1 (en) * | 1982-11-09 | 1984-05-10 | Johannes 7953 Bad Schussenried Falkenstein | Drive unit for pressure-medium drives |
| CH674058A5 (en) * | 1986-10-22 | 1990-04-30 | Festo Kg | |
| DE8628149U1 (en) * | 1986-10-22 | 1987-11-05 | Festo KG, 7300 Esslingen | Piston-cylinder unit |
| FR2634256B1 (en) * | 1988-07-13 | 1992-12-31 | Automax | IMPROVED CYLINDER |
| SE9200995L (en) * | 1992-03-31 | 1993-05-24 | Uniroc Ab | BATTERY PISTON FOR PUMP DRILLING MACHINE |
| EP0643002B1 (en) * | 1993-09-06 | 1997-10-29 | Focke & Co. (GmbH & Co.) | Manipulator with telescopic portion |
| DE4403639A1 (en) * | 1994-02-05 | 1995-08-10 | Festo Kg | Fluidically actuated feed unit |
| IT1295050B1 (en) * | 1997-09-23 | 1999-04-27 | Luciano Migliori | DOUBLE ACTING TELESCOPIC PNEUMATIC ACTUATOR |
-
2001
- 2001-04-24 DE DE10120026A patent/DE10120026C2/en not_active Expired - Fee Related
-
2002
- 2002-03-25 DE DE50200884T patent/DE50200884D1/en not_active Expired - Lifetime
- 2002-03-25 EP EP02006632A patent/EP1253329B1/en not_active Expired - Fee Related
- 2002-04-24 US US10/131,514 patent/US6637316B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US20020162447A1 (en) | 2002-11-07 |
| DE50200884D1 (en) | 2004-09-30 |
| EP1253329A1 (en) | 2002-10-30 |
| DE10120026A1 (en) | 2002-12-05 |
| US6637316B2 (en) | 2003-10-28 |
| DE10120026C2 (en) | 2003-04-03 |
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