EP0068088B1 - Vérin à fluide à cylindre fendu et extrémitées fermées - Google Patents

Vérin à fluide à cylindre fendu et extrémitées fermées Download PDF

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Publication number
EP0068088B1
EP0068088B1 EP82103023A EP82103023A EP0068088B1 EP 0068088 B1 EP0068088 B1 EP 0068088B1 EP 82103023 A EP82103023 A EP 82103023A EP 82103023 A EP82103023 A EP 82103023A EP 0068088 B1 EP0068088 B1 EP 0068088B1
Authority
EP
European Patent Office
Prior art keywords
cylinder tube
piston
longitudinal slot
guideways
longitudinal
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
Application number
EP82103023A
Other languages
German (de)
English (en)
Other versions
EP0068088A1 (fr
Inventor
Siegmund H. Kaiser
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.)
Norgren Martonair Europa GmbH
Original Assignee
Proma Produkt- und Marketing-Gesellschaft Mbh
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 Proma Produkt- und Marketing-Gesellschaft Mbh filed Critical Proma Produkt- und Marketing-Gesellschaft Mbh
Priority to AT82103023T priority Critical patent/ATE11951T1/de
Publication of EP0068088A1 publication Critical patent/EP0068088A1/fr
Application granted granted Critical
Publication of EP0068088B1 publication Critical patent/EP0068088B1/fr
Expired 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
    • F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type

Definitions

  • the invention relates to a pressure medium cylinder with a longitudinally slotted cylinder tube which is closed at the end, in which a sealed piston is guided so as to be longitudinally displaceable and the longitudinal slot of which is sealed on both sides of the piston by an internal flexible sealing tape, which in the area of the piston and one which projects outwards through the longitudinal slot, with which Piston directly connected to the power transmission element is passed, the power transmission element being guided longitudinally via a parallel guide rigidly connected to the cylinder tube and having at least two guide tracks lying outside the cylinder tube.
  • the actuating force resulting from the pressure medium acting on the piston is transmitted directly through the longitudinal slot of the cylinder tube to the driven device via the force transmission element, with the result that piston rods are eliminated.
  • the longitudinal slot necessarily means a certain weakening of the cylinder tube, so that precautions must be taken under higher loads in order to prevent undesirable expansion of the longitudinal slot. If the longitudinal slot widens, the sealing tape may no longer be able to function properly, which may result in leakages or even the so-called tape explosion associated with a considerable risk of accident. In addition, excessive side forces must not be exerted on the force transmission member by the driven device, because these forces must also be absorbed by the slotted cylinder tube.
  • the sealing strip Since the sealing strip must remain flexible in spite of its U-shaped cross-sectional shape, it can absorb transverse forces acting on its flanges only to a relatively small extent, which also limits its effectiveness in terms of holding the longitudinal slot together. Attempts have also already been made (DE-C-804 632) to remedy the weakening of the cylinder tube resulting from the longitudinal slot in that each longitudinal edge of the slot is delimited by an outwardly projecting longitudinal flange and the two longitudinal flanges are attached by a cross-section C- shaped bracket are held together.
  • the bracket causes quite unfavorable sealing conditions with an external sealing tape and a complicated, with a part penetrating under the bracket, force transmission element, which can only be coupled laterally next to the longitudinal slot to the device driven by it, so that a moment is exerted on the force transmission element when driving becomes what is undesirable.
  • the object of the invention is therefore to provide a pressure medium cylinder with a longitudinally slotted cylinder tube, which is characterized by a simple construction due to a high strength of the cylinder tube against widening in the region of the longitudinal slot and which can also be used for applications in which the drive stroke is directed transversely to the cylinder longitudinal axis Forces act on the power transmission element or it is exposed to the action of moments acting on it.
  • the pressure medium cylinder mentioned at the outset is characterized in that on both sides of the longitudinal slot, at least one guideway of the parallel guide in the area between the outer edge of the longitudinal slot and the one containing the piston axis and at right angles to the one on the outside of the cylinder tube the piston axis and the longitudinal slot extending longitudinal center plane extending transverse plane is arranged, and that the force transmission element has a bow-like guide part which overlaps the cylinder tube up to the height of the guideways and which laterally against the Guideways is supported and by which the cylinder tube is held together in the area of the longitudinal slot.
  • the two guideways lie on both sides of the longitudinal slot, above the transverse plane containing the piston axis, i. H. in more or less immediate vicinity of the longitudinal slot.
  • the cylinder tube is held together in the area of the longitudinal slot by the bow-like guide part of the force transmission element, which significantly increases its resistance to widening of the longitudinal slot.
  • the guideways form a parallel guide for the force transmission element, via which moments or lateral forces acting on the force transmission element, for example, can be perfectly absorbed and can be derived directly into the wall of the cylinder tube without being able to impair the piston or the force transmission element.
  • the cylinder tube carries at least on one side of the longitudinal slot two paired parallel guideways, whereby the number of places which these reaction forces are introduced into the cylinder tube wall is increased accordingly.
  • the two guideways lying one above the other in pairs can each lie above and below the transverse plane containing the piston axis, which is particularly expedient if reaction forces acting on the force transmission element in the circumferential direction of the cylinder tube are to be expected.
  • the guideways lying on both sides of the longitudinal slot lie with their central axis in a plane running through the piston axis, which is at an angle with the longitudinal central plane of the longitudinal slot approx. 45 °.
  • the guideways can be formed by longitudinal grooves arranged on the outside of the cylinder tube or the guide part, which in a preferred embodiment have a prismatic shape.
  • the guide part is expediently supported via guide strips against the longitudinal grooves, which can consist of a wear-resistant, low-friction material, preferably a plastic material.
  • the guide part is supported against the guideways by rolling elements.
  • the guide part is adjustably supported against the guideways in order to ensure an exact play-free guidance of the force transmission element and to be able to compensate for any signs of wear and manufacturing tolerances.
  • the pressure medium cylinder has a cylinder tube 1 which contains a cylindrical cylinder bore 2, the axis 3 of which is arranged eccentrically with respect to the central plane of the cylinder tube 1 indicated at 4.
  • the cylinder tube 1 is delimited at the top and bottom by two parallel surfaces 5, 6 and has a longitudinal slot 7 leading into the cylinder bore 2, which opens into the surface 5.
  • a piston 10 is displaceably guided in the cylinder bore 2 of the cylinder tube 1 closed at the end by two covers 8, 9, which is sealed at the ends at 11 and 12 by means of a sealing sleeve against the inner wall of the cylinder bore 2 and has a central part 13 of smaller diameter.
  • a force transmission element 14 is placed on the part 13, which projects through the longitudinal slot 7 by means of a web-like part 15 and has a bow-shaped guide part 16 connected to the web-like part 15, which in the manner shown in FIG. 2 has an essentially U-shaped cross-sectional shape and partially engages around the cylinder tube 1 from the outside.
  • On the guide member 16, two parallel flanges 17 are placed, which are used to connect the driven device, not shown.
  • the force transmission element 14 is formed in one piece with all of its parts.
  • a multi-part power transmission element 14 is used, the parts (for example 15, 16, 17) of which are screwed or welded together.
  • two prismatic guide grooves 18 of essentially triangular cross-sectional shape are arranged in the outer wall of the cylinder tube 1, which are oriented parallel to one another and extend over the length of the cylinder tube 1 and form guide tracks for the force transmission element 14.
  • the guide grooves 18 interact two prismatic guide strips 19 which are inserted into corresponding grooves on the inside of the legs 20 of the guide member 16 and which consist of a low-friction and ver wear-resistant material, in particular a plastic material such as polytetrafluoroethylene.
  • the guide strips 19, which together with the guide grooves 18 form a parallel guide for the force transmission element 14 and via which the guide part 16 and thus the force transmission element 14 itself is supported against the outer wall of the cylinder tube 1, are by means of set screws 21 on the longitudinal center plane of the longitudinal slot indicated at 22 7 too adjustable.
  • the cylinder tube 1 can also have further guide grooves, two of which are provided at 18a in the present case.
  • the two guide grooves 18a lie below the transverse plane 23 containing the axis 3 of the cylinder bore 2 and thus of the piston 10; corresponding guide strips 19a engage in it, one of which is illustrated in broken lines in FIG. 2 and which can also be adjusted by means of screws 21.
  • the guide strips 19a are in turn each arranged in an extension, for example schematically indicated at 24, of the associated leg 20 of the guide part 16.
  • rolling elements or roller bearings could naturally also be used as support elements, as is also conceivable to arrange the guide grooves 18 in the legs 20 and to provide the guide strips 19 or the mentioned support elements on the outer cylinder tube wall.
  • the two guide grooves 18 each lie with their central axis in a plane running through the piston axis 3, which includes an angle ⁇ of approximately 45 ° with the longitudinal central plane 22 of the longitudinal slot 7. This ensures uniform absorption of a radial load of the force transmission element 14 by both guide grooves 18.
  • a flexible band 25 which is arranged in the cylinder bore 2 and is anchored at the ends in the covers 8, 9 and which is guided under a band-widening part 26 which is double-wedge-shaped in the longitudinal direction of the cylinder and on which a flexible part also extends the covers 8, 9 anchored at the end there is a cover band 27 which is pressed against the outer surface of the cylinder tube by two pressure parts 28 at the ends of the force transmission element 14 above the piston 10.
  • the cover band 27 lies in a longitudinal groove 29 of the surface 5 of the cylinder tube 1 which is symmetrical with the longitudinal slot 7, while the cover band 25 lies outside the piston 10 in a longitudinal groove 30 which is also arranged symmetrically with respect to the longitudinal slot 7 gives him a lateral guide at the same time and the bottom 31 absorbs the pressure medium load.
  • the sealing tape 25 is provided with two wedge-shaped sealing lips or strips 32 which cooperate with corresponding sealing surfaces 33 in the area of the cylinder bore 2.
  • the masking tape 27 holds the sealing tape 25 by means of two releasable connecting links which are formed in the form of a web 34 which is essentially wedge-shaped in cross section and which is provided on the sealing tape 25 and is also provided on the masking tape 27 and has a correspondingly wedge-shaped profiled longitudinal groove 35.
  • the two connecting elements 34, 35 are released from each other during the forward movement of the piston and the spreading of the two bands 25, 27 caused thereby by the band expansion part 26, while they are brought into engagement by the piston 10 and the pressure part 28 on the other side of the piston, so that they assume the state of Figure 3.

Claims (10)

1. Vérin à fluide comprenant un cylindre (1) fendu longitudinalement et fermé à ses extrémités dans lequel un piston (10) se déplace de façon étanche dans le sens de la longueur et dont la fente longitudinale (7) des deux côtés du piston est rendue étanche par une bande d'étanchéité flexible interne (25) qui, dans la zone du piston, se trouve en-dessous d'un élément de transmission (14) faisant saillie à l'extérieur à travers la fente longitudinale (7) et solidaire du piston (10), l'élément de transmission étant guidé dans le sens de la longueur par un guidage parallèle (18-19) rigidement relié au cylindre (1) et comportant au moins deux pistes de guidage (18) situées à l'extérieur du cylindre, caractérisé par le fait que des deux côtés de la fente longitudinale (7) directement sur la face externe du cylindre (1) au moins une piste de guidage (18) du guidage parallèle est respectivement aménagée dans la zone comprise entre les bords externes de la fente longitudinale (7) et le plan transversal (23) contenant l'axe du piston et disposé à angle droit par rapport au plan médian longitudinal (22) passant par l'axe (3) du piston et la fente longitudinale (7), et que l'élément de transmission (14) comporte un organe de guidage (16) en forme d'étrier qui coiffe le cylindre (1) jusqu'à la hauteur des pistes de guidage (18), s'appuie latéralement contre les pistes de guidage (18) et empêche le cylindre (1) de s'écarter dans la zone de la rainure longitudinale (7).
2. Vérin à fluide selon la revendication 1, caractérisé par le fait que le cylindre (1) porte au moins sur un côté de la fente longitudinale (7) deux pistes de guidage parallèles (18, 18a) disposées par paires l'une au-dessus de l'autre.
3. Vérin à fluide selon la revendication 2. caractérisé par le fait que les deux pistes de guidage (18, 18a) disposées par paires l'une au-dessus de l'autre sont respectivement placées au-dessus et au-dessous du plan transversal (23) contenant l'axe du piston.
4. Vérin à fluide selon l'une des revendications précédentes, caractérisé par le fait que les axes médians des pistes de guidage (18, 18a) disposés des deux côtés de la fente longitudinale (7) sont respectivement situés dans un plan qui passe par l'axe (3) du piston et forme un angle (a) d'environ 45° avec le plan médian longitudinal (22) de la fente longitudinale (7).
5. Vérin à fluide selon l'une des revendications précédentes, caractérisé par le fait que les pistes de guidage sont formées par des rainures longitudinales (18, 18a) placées sur la paroi externe du cylindre ou sur l'organe de guidage (16).
6. Vérin à fluide selon la revendication 5, caractérisé par le fait que les rainures longitudinales (18, 18a) ont une forme prismatique.
7. Vérin à fluide selon la revendication 5 ou 6, caractérisé par le fait que l'organe de guidage (16) prend appui dans les rainures longitudinales (18, 18a) par l'intermédiaire de barres de guidage (19, 19a).
8. Vérin à fluide selon la revendication 7, caractérisé par le fait que les barres de guidage (19, 19a) sont réalisées en un matériau résistant à l'usure et à faible coefficient de frottement, de préférence en matière plastique.
9. Vérin à fluide selon l'une des revendications précédentes, caractérisé par le fait que l'organe de guidage (16) est monté réglable dans les pistes de guidage (18, 18a).
10. Vérin à fluide selon l'une des revendications précédentes, caractérisé par le fait que l'organe de guidage (16) prend appui dans les pistes de guidage (18, 18a) par l'intermédiaire d'éléments roulants.
EP82103023A 1981-06-25 1982-04-08 Vérin à fluide à cylindre fendu et extrémitées fermées Expired EP0068088B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82103023T ATE11951T1 (de) 1981-06-25 1982-04-08 Druckmittelzylinder mit einem laengsgeschlitzten endseitig verschlossenen zylinderrohr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3124915A DE3124915C2 (de) 1981-06-25 1981-06-25 Druckmittelzylinder mit einem längsgeschlitzten endseitig verschlossenen Zylinderrohr
DE3124915 1981-06-25

Publications (2)

Publication Number Publication Date
EP0068088A1 EP0068088A1 (fr) 1983-01-05
EP0068088B1 true EP0068088B1 (fr) 1985-02-20

Family

ID=6135322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103023A Expired EP0068088B1 (fr) 1981-06-25 1982-04-08 Vérin à fluide à cylindre fendu et extrémitées fermées

Country Status (4)

Country Link
EP (1) EP0068088B1 (fr)
AT (1) ATE11951T1 (fr)
DE (1) DE3124915C2 (fr)
DK (1) DK151052C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476265A1 (fr) 1990-08-03 1992-03-25 Knorr-Bremse Ag Vérin à fluide avec cylindre fendu
DE4027636A1 (de) * 1990-08-31 1992-04-09 Airtec Pneumatic Gmbh Fluidgetriebener kolbenstangenloser arbeitszylinder
DE4334681A1 (de) * 1993-10-12 1995-04-13 Norgren Martonair Gmbh Bewegungseinheit zur Erzeugung einer Linearbewegung

Families Citing this family (32)

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Publication number Priority date Publication date Assignee Title
SE8107724L (sv) * 1981-12-22 1983-06-23 Mecman Ab Anordning vid en kolvstangslos tryckmediecylinder
DE3205143C2 (de) * 1982-02-13 1984-02-09 Reinhard 7310 Plochingen Lipinski Mechanische Lineareinheit
DE3374707D1 (en) * 1982-08-05 1988-01-07 Knorr Bremse Ag Rodless hydraulic ram
DE3229305A1 (de) * 1982-08-05 1984-02-09 Knorr-Bremse GmbH, 8000 München Bremseinrichtung fuer fluidgetriebene kolbenstangenlose arbeitszylinder
DE3370172D1 (en) * 1983-01-14 1987-04-16 Proma Prod & Marketing Gmbh Pressure cylinder with a longitudinally slotted barrel closed at both ends
CH660513A5 (de) * 1983-05-17 1987-04-30 Sft Ag Spontanfoerdertechnik Antriebsvorrichtung mit einem einer allgemeine bahnbewegung folgenden kraftuebertragung.
DE3328786A1 (de) * 1983-08-10 1985-02-28 Robert Bosch Gmbh, 7000 Stuttgart Kolbenstangenloser arbeitszylinder
DE3330933C2 (de) * 1983-08-27 1995-12-07 Franco Toss Hubzylinder-Einheit
DE3340291A1 (de) * 1983-11-08 1985-05-23 ORIGA GmbH Pneumatik, 7024 Filderstadt Druckmittelzylinder
US4545290A (en) * 1983-12-23 1985-10-08 Tol-O-Matic, Inc. Pressure cylinder
DE3411823A1 (de) * 1984-03-30 1985-10-10 Festo KG, 7300 Esslingen Fuehrungsgehaeuse fuer das zum kraftabgriff dienende, linear bewegte abtriebsteil eines motors
DE3464406D1 (de) * 1984-04-10 1987-07-30 Reinhard Lipinski Linear transporter
DE3436977A1 (de) * 1984-10-09 1986-04-10 Antriebs Steuerungstech Ges Linearantrieb
EP0196572A3 (fr) 1984-11-14 1987-05-27 Knorr-Bremse Ag Dispositif de positionnement pour vérin sans tige
US4724744A (en) * 1985-12-18 1988-02-16 Tol-O-Matic, Inc. Carrier bracket for power cylinder
DE3609605A1 (de) * 1986-03-21 1987-09-24 Festo Kg Linearmotor
DE3619473A1 (de) * 1986-06-10 1987-12-17 Knorr Bremse Ag Druckmittelgetriebener, kolbenstangenloser arbeitszylinder
DE3631514A1 (de) * 1986-09-17 1988-03-24 Proma Prod & Marketing Gmbh Druckmittelzylinder
JPH0765602B2 (ja) * 1987-01-30 1995-07-19 豊和工業株式会社 ロツドレスシリンダ
DE3807786A1 (de) * 1987-03-12 1988-09-22 Ckd Corp Kolbenstangenloser zylinder
US4838147A (en) * 1988-01-26 1989-06-13 Grigory Grishchenko Pressure fluid actuator
SE465787B (sv) * 1990-02-09 1991-10-28 Bo Granbom Fastsaettningsanordning foer fastsaettning av en skena vid en manoevercylinder
US5275088A (en) * 1991-10-11 1994-01-04 Smc Kabushiki Kaisha Rodless cylinder
JP2575245B2 (ja) * 1991-11-01 1997-01-22 エスエムシー株式会社 ロッドレスシリンダ
EP0542211B1 (fr) * 1991-11-11 1997-04-23 Smc Kabushiki Kaisha Vérin sans tige
DE4137789C2 (de) * 1991-11-16 1994-01-20 Festo Kg Linearantrieb
DE4206751A1 (de) * 1992-03-04 1993-09-09 Festo Kg Linearantrieb
US5333535A (en) * 1992-07-21 1994-08-02 Smc Kabushiki Kaisha Rodless cylinder
AT403502B (de) * 1994-11-30 1998-03-25 Hygrama Ag Kolbenstangenloser druckmittelzylinder
US6257123B1 (en) 1997-10-24 2001-07-10 Phd, Inc. Rodless slides
AT2689U1 (de) * 1998-07-01 1999-02-25 Hygrama Ag Kolbenstangenloser druckmittelzylinder
RU2659851C1 (ru) * 2016-11-24 2018-07-04 Федеральное государственное бюджетное учреждение науки Институт проблем управления им. В.А. Трапезникова Российской академии наук Многопозиционный пневматический модуль линейных перемещений

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DE846493C (de) * 1950-10-12 1952-08-14 Brown Brothers & Co Ltd Zylinder- und Kolben-Durchbildung
DE843482C (de) * 1950-12-16 1952-07-10 Brown Brothers & Co Geschlitzter Zylinder
DE2908605A1 (de) * 1979-03-05 1980-09-11 Geb Kotz Rosa Mueller Pneumatische lineareinheit mit zylindern ohne kolbenstange

Non-Patent Citations (1)

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Title
NAVY TECHNICAL DISCLOSURE BULLETIN, Band 4, Nr.11, November 1979, J.A. CYMERMAN: "Dynamic seal for slotted cylinder", Seiten 5 bis 9 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476265A1 (fr) 1990-08-03 1992-03-25 Knorr-Bremse Ag Vérin à fluide avec cylindre fendu
DE4027636A1 (de) * 1990-08-31 1992-04-09 Airtec Pneumatic Gmbh Fluidgetriebener kolbenstangenloser arbeitszylinder
DE4334681A1 (de) * 1993-10-12 1995-04-13 Norgren Martonair Gmbh Bewegungseinheit zur Erzeugung einer Linearbewegung

Also Published As

Publication number Publication date
DK151052B (da) 1987-10-19
EP0068088A1 (fr) 1983-01-05
DE3124915C2 (de) 1984-10-31
DE3124915A1 (de) 1983-01-13
DK151052C (da) 1988-03-14
ATE11951T1 (de) 1985-03-15
DK221782A (da) 1982-12-26

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