EP0142665B1 - Cylindre à fluide de pression ayant un cylindre fendu fermé aux deux extrémités - Google Patents

Cylindre à fluide de pression ayant un cylindre fendu fermé aux deux extrémités Download PDF

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Publication number
EP0142665B1
EP0142665B1 EP84111141A EP84111141A EP0142665B1 EP 0142665 B1 EP0142665 B1 EP 0142665B1 EP 84111141 A EP84111141 A EP 84111141A EP 84111141 A EP84111141 A EP 84111141A EP 0142665 B1 EP0142665 B1 EP 0142665B1
Authority
EP
European Patent Office
Prior art keywords
pressure
longitudinal slot
sealing strip
cylinder according
medium cylinder
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
EP84111141A
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German (de)
English (en)
Other versions
EP0142665A1 (fr
Inventor
Heinrich Dr. Kedzierski
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.)
Wabco Westinghouse Steuerungstechnik and Co GmbH
Original Assignee
Wabco Westinghouse Steuerungstechnik and Co 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 Wabco Westinghouse Steuerungstechnik and Co GmbH filed Critical Wabco Westinghouse Steuerungstechnik and Co GmbH
Priority to AT84111141T priority Critical patent/ATE24952T1/de
Publication of EP0142665A1 publication Critical patent/EP0142665A1/fr
Application granted granted Critical
Publication of EP0142665B1 publication Critical patent/EP0142665B1/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 according to the preamble of patent claim 1.
  • Such a so-called rodless cylinder is previously known from EP-A-0 069199.
  • a cover tape arranged on the outside of the cylinder tube which can be brought into engagement with the sealing tape.
  • a web-shaped extension of the sealing strip projects into a corresponding groove in the cover strip, the extension and the groove forming a clamp connection.
  • the sealing tape and the cover tape are separated from one another, the sealing tape being guided below and the cover tape above a force transmission element forming part of a driver element.
  • a rodless cylinder in which instead of the sealing tape an elastic lining of the cylinder tube is provided, which is slotted in the area of the longitudinal slot of the cylinder tube so that the ends of the lining layer overlap in a sealing manner.
  • the driver member connected to the piston is guided in the non-radial direction through the slot of the elastic lining and then through the longitudinal slot of the cylinder tube.
  • the elastic lining which analogously forms an inner tube in the cylinder tube, is not to be arranged and aligned so precisely that the slot of the lining, the longitudinal slot of the cylinder tube and the driving element are arranged with respect to one another in terms of wear and tightness. Furthermore, an axial prestress of the inner tube in the area of the slot is required for a sufficient seal even with relatively long cylinders.
  • the invention is therefore based on the object of improving a pressure medium cylinder of the type mentioned in such a way that a largely wear-free and easy to manufacture or assemble seal of the cylinder and guidance of the driving member is made possible in a simple manner.
  • the invention has the advantage that for the secure sealing of the longitudinal slot an easy to install and easy, e.g. Plastic sealing tape can be used. By lifting the sealing tape on only one side of the longitudinal slot, the driver member can be easily guided. Another advantage of the invention is that the same sealing tape can be used for different cylinders with different diameters. It is also possible to manufacture the sealing tape and, if necessary, the intermediate piece from a steel tape which has a high wear resistance. If the sealing tape is attached to the cylinder tube continuously or at least several times at comparatively short intervals, e.g. in the event of an undesirable deflection of the cylinder, there is no summation of the changes in length of the sealing tape.
  • an easy to install and easy e.g. Plastic sealing tape can be used. By lifting the sealing tape on only one side of the longitudinal slot, the driver member can be easily guided.
  • Another advantage of the invention is that the same sealing tape can be used for different cylinders with different diameters. It is also possible to manufacture the sealing tape and, if necessary, the intermediate
  • a part of a pressure medium cylinder is shown with an end-closed, longitudinally slotted cylinder tube 1, in which a sealed piston, not shown, is guided in a longitudinally displaceable manner, which carries a driver member projecting outward through the longitudinal slot 11.
  • the longitudinal slot 11 of the cylinder tube 1 formed by the edges 9 and 12 of the cylinder tube 1 is sealed by a flexible sealing tape 4 arranged in the cylinder tube 1 and covering the longitudinal slot 11 on both sides of the piston.
  • a fastening element 7 which is flush with the edge of the cylinder tube is fastened on the outer surface of the cylinder tube 1.
  • the symbolically represented fastening 8 of this fastening element 7 can e.g. be realized by means of a screw, an adhesive connection or a frictional connection.
  • the sealing tape 4 Below the longitudinal slot 11 in the interior of the cylinder tube 1 is the sealing tape 4, the flexible ends 3 and 5 of which lie sealingly on the opposite surfaces 2 and 6 of the inner wall of the cylinder tube 1.
  • the cylinder space below the sealing strip 4 is pressurized, so that the sealing strip is pressed against the inner wall of the cylinder tube 1 in the cylinder space under the influence of the pressure medium.
  • the sealing tape 4 is connected to the fastening element 7 by means of an intermediate piece 10.
  • the intermediate piece 10 engages in the middle or approximately in the middle of the sealing tape 4.
  • the three elements 4, 10 and 7 are each formed as long strips which form an integral part.
  • the intermediate piece 10 is S-shaped and so biased that the fastening element 7 and the sealing tape 4 include the side 9 of the cylinder tube 1 in the manner of a resilient clamp. For this reason it is u. U. not necessary to attach the fastener 7 inseparably to the cylinder tube 1.
  • the contour of the sealing tape 4 pointing towards the interior of the cylinder space is designed such that the running and the sealing effect of the piston, not shown, are not significantly impaired.
  • the intermediate piece 10 is elastic and biased.
  • the surface of the bendable, e.g. to provide a non-metallic sealing tape 4 with a wear-free metallic, in particular resilient layer.
  • the sealing tape 4 e.g. advantageously be covered with a thin layer of resilient steel. It is also possible to produce all parts of the sealing device 4, 10 and 7 from steel strips.
  • the fastening element 7 is flush with the front edge 9 of the cylinder tube 1. However, it is also possible to attach the fastening element 7 at another location on the cylinder tube 1, e.g. to be fastened within the longitudinal slot 11.
  • the fastening element 7 and the intermediate piece 10 can be omitted and the sealing tape 4 with one of its end regions, e.g. the end 5 are attached to the cylinder tube 1.
  • an adhesive connection e.g. an adhesive connection.
  • FIG. 1 shows a section through a sealed part of the cylinder
  • FIG. 2 shows a section through the driving member 19 connected to the piston, not shown.
  • the cylinder shown in FIG. 2 has a similar construction with respect to the sealing device for the longitudinal slot 16 as the cylinder according to FIG. 1.
  • the longitudinal slot 16 of the cylinder tube 13, 24 formed by the edges 31 and 25 of the cylinder tube 13, 24 is at the points in front of and behind the driver member 19 by the bendable sealing tape 28 arranged in the cylinder tube 13, 24 and covering the longitudinal slot 16 on both sides of the piston sealed.
  • a fastening element 23 is fastened on one side 25 of the longitudinal slot 16 on the outer surface of the cylinder tube 13, 24.
  • the symbolically represented fastening 22 of this fastening element 23 can e.g. be realized by means of a screw, an adhesive connection or a frictional connection.
  • the sealing tape 28 is connected to the fastening element 23 by means of an intermediate piece 20.
  • the intermediate piece 20 engages approximately in the middle of the sealing tape 28.
  • the three elements 23, 20 and 28 can be designed corresponding to the elements 7, 10 and 4 of the sealing device according to FIG. 1.
  • the intermediate piece 20 is S-shaped and so biased that the fastening element 23 and the sealing tape 28 in the sealed state of the longitudinal slot 16 include the side 25 of the cylinder tube 13, 24 in the manner of a resilient clamp.
  • FIG. 2 shows a state in which the sealing tape 28 is lifted off the cylinder tube 13, 24 by means of the driving element 19.
  • the driver member 19 is attached to the piston, not shown, and transmits the movement of the piston and the forces exerted by the piston to the piston, which is also not shown. parts to be driven.
  • the driver member 19 has a kink within the cylinder tube 13, 24 so that it is guided radially outward in the region of the longitudinal slot 16. In the area of the kink 30, the driver member 19 bears against the part 26 of the sealing tape 28 or the intermediate piece 20 which is lifted from the cylinder tube 13, 24 against the spring force of the intermediate piece 20. Since the arrangement shown in FIG. 2 is located within the piston shown and the piston has seals on both sides of the driving element 19, no pressure medium is lost through the opening of the longitudinal slot 16 forced by the driving element 19.
  • the sealing tape 28 In order to be able to lift the sealing tape 28 off the cylinder tube 13, 24 as frictionlessly as possible by means of the driving element 19, it is advantageous to make the outer surface of the kink 30 of the driving element 19 low-friction. It is also possible to connect a special displacement element upstream and downstream of the driving element 19 so that the sealing tape 28 slides on a kind of sliding curve before and after reaching the driving element 19.
  • the displacement element can in particular be designed in such a way that the sealing strip is deformed and moved essentially only in the tangential direction at the level of the driving element 19.
  • the intermediate piece 20 and the sealing tape 28 are formed and biased so that the Ends 27 and 29 of the sealing tape 28 in the illustrated state do not rest against the inner wall of the cylinder tube 24 or against the driver member 19.
  • the result of this is that the ends 27 and 29 of the sealing tape 28 mentioned are not subject to wear due to the driving member 19 sliding past.
  • the longitudinal slot 16 is widened outwards.
  • the edges 15 and 21 of the longitudinal slot 16 are beveled,
  • a further sealing tape 17 is provided, which is fastened to the edge 31 of the longitudinal slot 16 by means of a fastening means 14.
  • the further sealing tape 17 is formed so that it can be lifted from the longitudinal slot 16 by the driver member 19 so that it abuts only one end 18 of the driver member 19.
  • FIG. 3 shows a special embodiment of the device shown in FIG. 2.
  • the same reference numerals in FIGS. 3 and 2 denote the same components with the same functions.
  • an axle 34 is attached, which carries a wheel 35 rotatably mounted on the axle 34.
  • the wheel 35 is arranged and dimensioned such that its outer circumferential surface 33 comes into contact with the intermediate piece 20 and thus the sealing tape 28 lifts off from the cylinder tube 13, 24 to such an extent that the driving member 19 can slide past the sealing tape 28 and the intermediate piece 20 without contact . In this way, wear of the driver member 19 or the sealing device 20, 28 is largely avoided.

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

Claims (21)

1 - Vérin à fluide sous pression comprenant un tube de cylindre (1; 13, 24) muni d'une fente longitudinale et fermé à ses extrémités, dans lequel est guide mobile en translation longitudinal; un piston monté à joint étanche et portant un organe d'entraînememt (19) qui fait saillie à l'extérieur à travers la fente longitudinale (11, 16), cette fente longitudinale du tube du cylindre étant fermée à joint étanche par une bande d'étanchéité souple (4, 28) disposée dans le tube du cylindre et qui recouvre la fente longitudinale de part et d'autre du piston, caractérisé par les points suivants:
a) la bande d'étanchéité (4, 28) est fixée à l'un des côtés (9, 25) de la fente longitudinale (11, 16) dans la région de cette fente longitudinale (11, 16);
b) l'organe d'entraînement (19) est agencé et conformé de manière à pouvoir se déplacer entre l'autre côté (12,31) de la fente longitudinale (11, 16) et la bande d'étanchéité (4, 28).
2 - Vérin à fluide sous pression selon la revendication 1, caractérisé en ce que la bande d'étanchéité (4, 28) est fixée sur toute sa longueur à l'un des côtés (9, 25) de la fente longitudinale (11, 16).
3 - Vérin à fluide sous pression selon la revendication 1 ou la revendication 2, caractérisé par les points suivants:
a) pour fixer la bande d'étanchéité (4, 28) à l'un des côtés (9, 25) de la fente longitudinale (11, 16), il est prévu un élément de fixation (16, 23) qui est fixé au tube (1, 13,24) du cylindre;
b) une partie intermédiaire souple (10,20) est prévue entre l'élément de fixation (7,23) et la bande d'étanchéité (4, 28).
4 - Vérin à fluide sous pression selon la revendication 3, caractérisé en ce que la bande d'étanchéité (4, 28), l'organe d'entraînement (19) et la partie intermédiaire (10, 20) sont conformés de manière que l'organe d'entraînement (19) n'entre pas en contact avec les parties latérales (3, 5, 27, 29) de la bande d'étanchéité (4, 28).
5 - Vérin à fluide sous pression selon la revendication 3 ou la revendication 4, caractérisé en ce que la partie intermédiaire (10, 20) est de configuration élastique.
6 - Vérin à fluide sous pression selon au moins l'une des revendications 3 à 5, caractérisé en ce que la partie intermédiaire (10,20) est de configuration telle que la bande d'étanchéité (4, 28) soit appuyée contre la paroi intérieure du tube (1, 13,24) du cylindre avec précontrainte lorsque la fente longitudinale (11, 16) est fermée à joint étanche.
7 - Vérin à fluide sous pression selon la revendication 3 et, éventuellement, au moins l'une des revendications 4 à 6, caractérisé en ce que la partie intermédiaire (10, 20) se raccorde au milieu ou à peu près au milieu du côté de la bande d'étanchéité (4,28) qui est dirigé vers la fente longitudinale (11, 16).
8 - Vérin à fluide sous pression selon la revendication 3 et, éventuellement, au moins l'une des revendications 4 et 7, caractérisé en ce que l'élément de fixation (7, 23) est fixé sur la surface externe du tube (1, 13, 24) dans la région de la fente longitudinale (11, 16).
9 - Vérin à fluide sous pression selon la revendication 3 et, éventuellement, au moins l'une des revendications 4 à 8, caractérisé en ce que l'élément de fixation (7, 23) est constitué par une bande allongée qui se termine de niveau avec le bord correspondant (9, 21) de la fente longitudinale (11, 16).
10 - Vérin à fluide sous pression selon la revendication 3 et, éventuellement, au moins l'une des revendications 4 à 9, caractérisé en ce que la bande d'étanchéité (4, 28), la partie intermédiaire (10, 20) et l'élément de fixation (7, 23) sont réalisés en une seule pièce.
11 - Vérin à fluide sous pression selon au moins l'une des revendications précédentes, caractérisé en ce que la bande d'étanchéité (4, 28) est faite d'une matière non métallique et est recouverte d'une couche métallique élastique sur son côté dirigé vers le piston.
12 - Vérin à fluide sous pression selon la revendication 1, caractérisé en ce que la couche métallique élastique est constituée par un feuillard d'acier à ressorts.
13 - Vérin à fluide sous pression selon la revendication 3 et, éventuellement, au moins l'une des revendications 4 à 12, caractérisé en ce que la partie intermédiaire (10, 20) présente une section en S dans la direction transversale à l'axe longitudinal du cylindre.
14 - Vérin à fluide sous pression selon au moins l'une des revendications précédentes, caractérisé en ce que l'organe d'entraînement (19) est disposé et conformé de manière à traverser la fente longitudinale (11, 16) dans une direction non radiale.
15 - Vérin à fluide sous pression selon la revendication 14, caractérisé en ce qu'au moins . l'autre côté de la fente longitudinale est conformé de manière qu'une surface du tube du cylindre qui forme une paroi de la fente longitudinale s'étende parallèlement à la direction longitudinale du cylindre ou à peu près parallèlement à l'organe d'entraînement (19).
16 - Vérin à fluide sous pression selon la revendication 8 et éventuellement, au moins l'une des revendications 9 et 15, caractérisé en ce que la partie intermédiaire (10, 20) est conformée de manière que l'élément de fixation (7,23) et la bande d'étanchéité (4,28) enserrent le tube (1, 13, 24) du cylindre dans la région de la fente longitudinale (11, 16) à la façon d'une pince élastique, en particulier, avec possibilité de déplacement par rapport au tube (1, 13, 24) du cylindre.
17 - Vérin à fluide sous pression selon au moins l'une des revendications précédentes, caractérisé par les points suivants:
a) sur au moins un côté du cylindre, est prévu un élément de déplacement, placé en amont de l'organe d'entraînement (19) et qui sert à déplacer la bande d'étanchéité (4, 28) ou une partie de la bande d'étanchéité (4, 28);
b) l'organe de déplacement est conformé de manière que la bande d'étanchéité (4, 28) se déforme et se déplace sensiblement dans une direction tangentielle au niveau de l'organe d'entraînement (19).
18 - Vérin à fluide sous pression selon au moins l'une des revendications précédentes, caractérisé en ce que l'organe d'entraînement (19) est relié au piston en un point excentré.
19 - Vérin à fluide sous pression selon la revendication 16, caractérisé par les points suivants:
a) l'organe d'entraînement (19) émerge à l'extérieur dans une direction non radiale;
b) l'organe d'entraînement (19) est d'une configuration telle que la partie de l'organe d'entraînement qui est située à l'extérieur du tube (13,24) du cylindre s'étende radialement ou à peu près radialement.
20 - Vérin à fluide sous pression selon au moins l'une des revendications précédentes, caractérisé en ce que la bande d'étanchéité (4, 28) est amincie à ses extrémités latérales (3, 5, 27, 29).
21 - Vérin à fluide sous pression selon au moins l'une des revendications 3 à 20, caractérisé par les points suivants:
a) il est prévu un galet de guidage (35) monté sur l'organe d'entraînement (19) et qui roule sur la partie intermédiaire (20) et sert à abaisser la bande d'étanchéité (28);
b) le galet de guidage (25) est monté et la partie intermédiaire (20) conformée de manière que la bande d'étanchéité (28) abaissée par le galet de guidage (35) ne vienne pas en contact avec le tube (13, 24) du cylindre ni avec l'organe d'entraînement (19).
EP84111141A 1983-10-21 1984-09-19 Cylindre à fluide de pression ayant un cylindre fendu fermé aux deux extrémités Expired EP0142665B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111141T ATE24952T1 (de) 1983-10-21 1984-09-19 Druckmittelzylinder mit einem endseitig verschlossenen, laengsgeschlitzten zylinderrohr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833338305 DE3338305A1 (de) 1983-10-21 1983-10-21 Druckmittelzylinder mit einem endseitig verschlossenen laengsgeschlitzten zylinderrohr
DE3338305 1983-10-21

Publications (2)

Publication Number Publication Date
EP0142665A1 EP0142665A1 (fr) 1985-05-29
EP0142665B1 true EP0142665B1 (fr) 1987-01-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111141A Expired EP0142665B1 (fr) 1983-10-21 1984-09-19 Cylindre à fluide de pression ayant un cylindre fendu fermé aux deux extrémités

Country Status (4)

Country Link
US (1) US4617857A (fr)
EP (1) EP0142665B1 (fr)
AT (1) ATE24952T1 (fr)
DE (2) DE3338305A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3509891A1 (de) * 1985-03-19 1986-09-25 Herion-Werke Kg, 7012 Fellbach Kolbenstangenloser zylinder
DE4141461C1 (en) * 1991-12-12 1993-05-13 Mannesmann Ag, 4000 Duesseldorf, De Slotted cylinder drive system - has cylinder sealed by profiled strip pushed down and to one side to make way for piston attachment
US5845582A (en) * 1997-11-13 1998-12-08 Aeromovel Global Corporation Slot sealing system for a pneumatic transportation system guideway
DE102005045969A1 (de) * 2005-09-26 2007-04-05 Airbus Deutschland Gmbh Wasserabweiser und System mit mehreren derartigen Wasserabweisern
US8544852B2 (en) 2011-06-03 2013-10-01 General Electric Company Torsion seal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD83708A (fr) *
EP0069199A1 (fr) * 1981-06-25 1983-01-12 PROMA Produkt- und Marketing-Gesellschaft m.b.H. Vérin à fluide

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Publication number Priority date Publication date Assignee Title
US2603190A (en) * 1948-06-12 1952-07-15 Brown Brothers & Co Ltd Cylinder and piston construction
SE326376B (fr) * 1968-11-15 1970-07-20 Mecmatic Ab
IT949094B (it) * 1972-02-15 1973-06-11 Pascale B Di Stantuffo scorrente in cilindro senza limitazione di cors
CH602974A5 (fr) * 1974-12-20 1978-08-15 Heidenhain Gmbh Dr Johannes
US4373427A (en) * 1980-01-31 1983-02-15 Tol-O-Matic, Inc. Fluid pressure cylinder
JPS5739307U (fr) * 1980-08-15 1982-03-03
SE8107724L (sv) * 1981-12-22 1983-06-23 Mecman Ab Anordning vid en kolvstangslos tryckmediecylinder
US4481869A (en) * 1982-05-14 1984-11-13 Greenco Corp. Fluid operated device with improved sealing means

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD83708A (fr) *
EP0069199A1 (fr) * 1981-06-25 1983-01-12 PROMA Produkt- und Marketing-Gesellschaft m.b.H. Vérin à fluide

Also Published As

Publication number Publication date
DE3338305A1 (de) 1985-05-02
ATE24952T1 (de) 1987-01-15
DE3462065D1 (en) 1987-02-19
US4617857A (en) 1986-10-21
EP0142665A1 (fr) 1985-05-29

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