EP1253329B1 - Vérin à pression fluidique avec dispositif anti-rotation - Google Patents

Vérin à pression fluidique avec dispositif anti-rotation Download PDF

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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
Authority
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.)
Expired - Fee Related
Application number
EP02006632A
Other languages
German (de)
English (en)
Other versions
EP1253329A1 (fr
Inventor
Heinz-Jürgen Engelke
Norbert Dipl.-Ing. Fortmann
Thomas Dipl.-Ing. Liesenhoff
Jens Dipl.-Ing. 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.)
Aventics GmbH
Original Assignee
Rexroth Mecman GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rexroth Mecman GmbH filed Critical Rexroth Mecman GmbH
Publication of EP1253329A1 publication Critical patent/EP1253329A1/fr
Application granted granted Critical
Publication of EP1253329B1 publication Critical patent/EP1253329B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • F15B15/08—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.

Landscapes

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

Claims (13)

  1. Vérin à fluide sous pression avec dispositif antirotation, comprenant essentiellement un tube de vérin (1) à section transversale intérieure non circulaire, dans lequel est logé avec étanchement un élément formant piston (2) en liaison coaxiale avec une tige de piston (3) du côté extrémité,
    caractérisé en ce que l'élément formant piston (2) possède une section transversale circulaire et est entouré par un élément formant bague d'adaptation (4) relié à lui-même mais capable de tourner par rapport à l'élément formant piston (2) et présentant une surface enveloppe intérieure correspondante de forme circulaire, dont la surface enveloppe extérieure (5) est formée en correspondance de la section transversale intérieure non circulaire du tube de vérin (1), dans lequel est prévu un moyen libérable pour bloquer l'élément formant bague d'adaptation (4) sur l'élément formant piston (2), afin de réaliser aussi bien une variante avec blocage antirotation, qu'une variante sans blocage antirotation.
  2. Vérin à fluide sous pression selon la revendication 1,
    caractérisé en ce que le moyen pour bloquer l'élément formant bague d'adaptation (4) est réalisé sur l'élément formant piston (2) à la manière d'une tige (10) susceptible d'être enfichée dans un perçage à tige correspondant ménagé radialement à travers l'élément formant piston (2) ainsi qu'à travers l'élément formant bague d'adaptation (4), pour empêcher une rotation relative de l'élément formant bague d'adaptation (4) par rapport à l'élément formant piston (2).
  3. Vérin à fluide sous pression selon la revendication 2,
    caractérisé en ce que pour bloquer l'élément formant bague d'adaptation (4) sur l'élément formant piston (2), il est prévu exactement deux tiges (10', 10") avec des perçages à tige correspondants agencés à distance l'un de l'autre.
  4. Vérin à fluide sous pression selon la revendication 1,
    caractérisé en ce que le moyen pour bloquer l'élément formant bague d'adaptation (4) sur l'élément formant piston (2) est réalisé à la manière d'une vis, que l'on peut visser dans un perçage taraudé sur l'élément formant piston (2), pour coincer l'élément formant bague d'adaptation (4).
  5. Vérin à fluide sous pression selon la revendication 1,
    caractérisé en ce que l'élément formant bague d'adaptation (4) et agencé avec faculté de rotation par coopération de formes via un évidement radial extérieur, en forme de gorge, sur l'élément formant piston (2).
  6. Vérin à fluide sous pression selon la revendication 1,
    caractérisé en ce qu'au moins un aimant permanent (7) est intégré dans l'élément formant bague d'adaptation (4) pour assurer une détection de la position du piston au moyen d'un capteur inductif monté à l'extérieur sur le tube de vérin (1).
  7. Vérin à fluide sous pression selon la revendication 1,
    caractérisé en ce que dans la région entre l'élément formant piston (2) et la paroi intérieure du tube de vérin (1) et agencé au moins un élément d'étanchéité (8a, 8b) sensiblement de forme annulaire, monté avec faculté de rotation sur l'élément formant piston (2), et coopérant de façon dynamique avec étanchement avec la paroi intérieure du tube de vérin (1).
  8. Vérin à fluide sous pression selon la revendication 7,
    caractérisé en ce qu'il est prévu exactement deux éléments d'étanchéité (8a, 8b) annulaires agencés à distance axiale sur l'élément formant piston (2), qui entourent l'élément formant bague d'adaptation (4) et qui forment conjointement un étanchement à lèvres double face pour assurer l'étanchement dynamique.
  9. Vérin à fluide sous pression selon la revendication 7,
    caractérisé en ce qu'une liaison de l'élément d'étanchéité (8a, 8b) avec coopération de formes permettant une faculté de rotation sur l'élément formant piston (2) a lieu au moyen d'une bague de maintien (9) périphérique, ou au moyen d'une gorge de maintien sur l'élément formant piston (2).
  10. Vérin à fluide sous pression selon l'une des revendications précédentes,
    caractérisé en ce que le tube de vérin (1) est constitué par un profilé creux en matière plastique ou en métal.
  11. Vérin à fluide de sous pression selon la revendication 10,
    caractérisé en ce qu'au moins une barrette de fixation (12a, 12b) parallèle à l'axe est conformée à l'extérieur sur le tube de vérin (1), pour fixer sur celui-ci un capteur ou une soupape de façon détachable.
  12. Vérin à fluide sous pression selon la revendication 10,
    caractérisé en ce que le tube de vérin (1) est doté sur ses deux faces frontales terminales de plusieurs perçages (11) au moyen desquels est assurée la fixation d'un élément formant fond de vérin, ou respectivement d'un élément formant couvercle de vérin, au moyen de vis autoforeuses.
  13. Vérin à fluide de sous pression selon l'une des revendications précédentes, caractérisé
    caractérisé en ce que la bague d'adaptation (4) est réalisée en matière plastique suivant un procédé de moulage par injection.
EP02006632A 2001-04-24 2002-03-25 Vérin à pression fluidique avec dispositif anti-rotation Expired - Fee Related EP1253329B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10120026A DE10120026C2 (de) 2001-04-24 2001-04-24 Druckmittelzylinder mit einer Verdrehsicherung
DE10120026 2001-04-24

Publications (2)

Publication Number Publication Date
EP1253329A1 EP1253329A1 (fr) 2002-10-30
EP1253329B1 true EP1253329B1 (fr) 2004-08-25

Family

ID=7682514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02006632A Expired - Fee Related EP1253329B1 (fr) 2001-04-24 2002-03-25 Vérin à pression fluidique avec dispositif anti-rotation

Country Status (3)

Country Link
US (1) US6637316B2 (fr)
EP (1) EP1253329B1 (fr)
DE (2) DE10120026C2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
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 (de) * 2010-06-23 2011-12-29 Thyssenkrupp Presta Ag Rotatorisch abgestützte Lenkspindel
DE102011080502B4 (de) * 2011-08-05 2015-03-12 Schunk Gmbh & Co. Kg Spann- Und Greiftechnik Spannvorrichtung und Palettenhandlingssystem
DE102011080504B4 (de) * 2011-08-05 2020-10-15 Schunk Gmbh & Co. Kg Spann- Und Greiftechnik Spannvorrichtung und Palettenhandlingssystem
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
KR101966074B1 (ko) * 2014-10-02 2019-04-05 에스엠시 가부시키가이샤 유체압 실린더
JP6853823B2 (ja) 2015-12-18 2021-03-31 グラコ ミネソタ インコーポレーテッド 往復動ポンプ
TW201727118A (zh) * 2015-12-18 2017-08-01 葛萊兒明尼蘇達股份有限公司 波紋管防止旋轉結構

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US3180236A (en) * 1962-12-20 1965-04-27 Beckett Harcum Co Fluid motor construction
DE2431706A1 (de) * 1974-07-02 1976-01-22 Festo Maschf Stoll G Arbeitszylinder fuer pneumatische und hydraulische medien
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 (de) * 1982-11-09 1984-05-10 Johannes 7953 Bad Schussenried Falkenstein Antriebsaggregat fuer druckmittelantriebe
DE8628149U1 (fr) * 1986-10-22 1987-11-05 Festo Kg, 7300 Esslingen, De
CH674058A5 (fr) * 1986-10-22 1990-04-30 Festo Kg
FR2634256B1 (fr) * 1988-07-13 1992-12-31 Automax Verin perfectionne
SE469185B (sv) * 1992-03-31 1993-05-24 Uniroc Ab Slagkolv foer saenkborrmaskin
DE59404462D1 (de) * 1993-09-06 1997-12-04 Focke & Co Handhabungsvorrichtung mit Teleskopteil
DE4403639A1 (de) * 1994-02-05 1995-08-10 Festo Kg Fluidisch betätigbare Vorschubeinheit
IT1295050B1 (it) * 1997-09-23 1999-04-27 Luciano Migliori Attuatore pneumatico telescopico a doppio effetto

Also Published As

Publication number Publication date
EP1253329A1 (fr) 2002-10-30
DE50200884D1 (de) 2004-09-30
US20020162447A1 (en) 2002-11-07
DE10120026C2 (de) 2003-04-03
DE10120026A1 (de) 2002-12-05
US6637316B2 (en) 2003-10-28

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