EP0976930A2 - Vérin à pression fluidique sans tige - Google Patents

Vérin à pression fluidique sans tige Download PDF

Info

Publication number
EP0976930A2
EP0976930A2 EP99890131A EP99890131A EP0976930A2 EP 0976930 A2 EP0976930 A2 EP 0976930A2 EP 99890131 A EP99890131 A EP 99890131A EP 99890131 A EP99890131 A EP 99890131A EP 0976930 A2 EP0976930 A2 EP 0976930A2
Authority
EP
European Patent Office
Prior art keywords
sealing
longitudinal slot
holding
sealing tape
strip
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.)
Ceased
Application number
EP99890131A
Other languages
German (de)
English (en)
Other versions
EP0976930A3 (fr
Inventor
Erhard Dr. Fritz
Peter Dipl.-Ing. Rohatschek
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.)
Hygrama AG
Original Assignee
Hygrama AG
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 Hygrama AG filed Critical Hygrama AG
Publication of EP0976930A2 publication Critical patent/EP0976930A2/fr
Publication of EP0976930A3 publication Critical patent/EP0976930A3/fr
Ceased legal-status Critical Current

Links

Images

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 rodless pressure medium cylinder, with a piston movable longitudinally in a cylinder tube and one on it attacking transmission element protruding through a longitudinal slot in the cylinder tube, as well as with a longitudinal slot on both sides of the piston of sealing tape inside, which is in the area of the transmission element is guided by the piston and one with two elongated Sealing areas in the area of the cylinder-side end of the longitudinal slot interacting sealing strips and at least one on the outside of the Sealing strip arranged holding strips with two themselves with respect to the central plane of the longitudinal slot opposite, essentially elongated and has outwardly directed holding elements, and with a longitudinal slot on both sides of the piston from the outside at least partially overlapping Outer band, which holding elements acting on the holding elements of the sealing tape for holding the sealing tape in the longitudinal slot, which Sealing tape apart from the sealing areas against the walls of the longitudinal slot is spaced.
  • Pressure rod cylinders without piston rods are available in a wide variety of designs known and are mostly used as pneumatically operated cylinders used in arrangements where the shorter installation length is opposite Cylinder with piston rod is an advantage.
  • the from the print medium to the The force exerted by the piston is exerted by the side protruding from the longitudinal slot Transfer transmission element to the device to be driven.
  • the pressure chambers on both sides of the piston are sealed on the one hand via sealing rings or sealing sleeves on the piston and on the other hand that from the inside on the elongated sealing areas in the area of end of the longitudinal slot on the cylinder-side sealing tape, which in the unpressurized area between the piston seals on the inside below is passed through the transmission element of the piston.
  • the sealing tape is through the in the pressurized cylinder interior prevailing pressure is pressed against the elongated sealing areas, however, measures must usually be taken to prevent that the sealing tape in the depressurized state of the respective interior in this sags because this leads to at least a temporary leak at the beginning of the Pressure build-up in this previously depressurized interior would result.
  • EP 69 199 B1 a pressure medium cylinder of the type mentioned, in which a the longitudinal slot from the outside to prevent the penetration of foreign bodies, Contaminants and the like covering outer band at the same time is designed to hold the inner sealing tape.
  • the middle of Sealing strips or sealing strips arranged holding strips have for this purpose projections on both sides as elongated holding elements, which of two associated strip-like holding elements of the outer band are overlapped, with which the sealing tape is form-fitting on the outer tape and thus in the longitudinal slot is held even if there is no pressure on the inside Sealing tape works. Since the longitudinal slot itself free of holding grooves or the like can remain, the execution of the cylinder tube is relatively simple, where necessary, the transmission element laterally in the longitudinal slot leads or can be supported.
  • the disadvantage of the known design mentioned is at most the fact that the joining and loosening of the holder of the inner sealing tape on Outer band due to the positive connection but relatively high forces needs what in the construction and construction of the interacting bands must be taken into account, in particular about pulling in the outer band into the longitudinal slot or a lifting of the same from the longitudinal slot to prevent the inner sealing tape.
  • the object of the present invention is it to avoid these disadvantages mentioned and in particular a pressure cylinder to improve the type mentioned so that the hold of the sealing tape is simplified in the safe operation of the arrangement.
  • This task is the one mentioned in a pressure medium cylinder Type solved according to the invention in that the holding elements on sealing tape and the outer band interact purely by friction. It has been surprising emphasized that the lower holding forces to be applied sufficient, the inner sealing tape even in the depressurized state of the underlying cylinder space securely in the slot or sealing to the elongated sealing areas in the area of the cylinder inner end keep the longitudinal slot, so that the described leaks avoided can be without too great forces to be overcome when joining or solve this holding connection to the problems mentioned regarding of the outer band can come.
  • the Outer band is made in one piece and on the inside of the cylinder tube facing side the substantially strip-shaped Holding elements for holding the sealing tape.
  • the outer band is divided in the longitudinal direction and the Holding strip of the sealing tape held clamped between the two parts is. So that the function of covering the longitudinal slot after outside of the split outer band and the inner sealing band clamped between them taken over together.
  • the outside of the cylinder barrel, for example, by clamping Split outer band held in a groove is even more in this variant secured against possible drawing into the longitudinal slot.
  • the sealing tape and preferably also the outer tape can be in another preferred embodiment of the invention made of elastic material, preferably Plastic, for example polyurethane, exist, at least the Sealing strip of the sealing tape inserted or formed linear, in the longitudinal direction aligned reinforcements, preferably made of steel wire or Kevlar threads. This results in the possibility of a practical one Production of the tapes.
  • FIG. 1 shows a longitudinal section through a pressure medium cylinder according to the invention and FIGS. 2 to 4 each show different cross sections of detail in the area of the longitudinal slot.
  • the rodless pressure medium cylinder according to FIG. 1 has an in a cylinder tube 1 longitudinally movable piston 2 and an engaging, through a longitudinal slot 3 in the cylinder tube 1 projecting transmission element 4 on. Furthermore, the longitudinal slot 3 is on both sides of the Piston 2 sealing tape 5 provided from the inside, which in Area of the transmission element 4 guided by this or the piston 2 is. The longitudinal slot 3 is covered on the outside by an outer band 6, which is also guided through this in the area of the transmission element 4. Sealing tape 5 and outer tape 6 are in the area of the cylinder tube 1 on both sides tightly fitting lids 7 attached, these lids 7 also Have supply lines 8 for the pressure medium.
  • the force exerted by the pressure medium on the piston 2 is on the Piston 2 attacking and protruding from the side longitudinal slot 3 Transmission element 4 to be driven not shown here Transfer facility.
  • the seal on both sides of the piston 2 Pressure chambers 9, 10 take place on the one hand via sealing rings 11 on the piston 2 and on the other hand by the sealing tape covering the longitudinal slot 3 from the inside 5, which in the unpressurized area between the sealing rings 11 to the inside to passed under the transmission element 4 or through the piston 2 is.
  • the sealing tape 5 has one with two elongated Sealing areas 12 in the area of the cylinder-side end of the longitudinal slot 3 cooperating sealing strips 13 and one on the outside of the sealing strip 13 arranged holding strip 14 with two with respect to each other the median plane 15 of the longitudinal slot 3 opposite, elongated and outwardly directed holding elements (or holding areas) 16.
  • On the outside of the longitudinal slot 3 is the longitudinal slot 3 according to FIG. 1 outer band at least partially covering both sides of the piston 2 from the outside 6 can be seen, which on the holding elements (or holding areas) 16 of the Sealing tape 5 attacking further holding elements 17 for holding the sealing tape 5 in the longitudinal slot 3, the sealing tape 5 itself apart from the Sealing areas 12 is spaced from the walls of the longitudinal slot 3.
  • the holding elements 16 and 17 on sealing tape 5 and outer tape 6 act through their shape shown in Fig. 2 purely frictionally together, so that this holding connection in the unpressurized area between the sealing rings 11 of the Piston 2 can be opened or joined very easily.
  • Each pressurized Pressure chamber 9 or 10 the inner sealing tape 5 is anyway from Internal pressure in the longitudinal slot 3 or pressed against the sealing areas 12; in the each pressureless pressure chamber 9 or 10 is sufficient by the interacting Holding elements 16 and 17 applied holding force.
  • the outer band 6 is made in one piece according to FIG. 2 and instructs its side facing the inside of the cylinder tube 1 which is essentially here strip-shaped holding elements 17 for holding the sealing tape 5, the dimensioning being such that the holding strip 14 on its holding elements 16 between the holding elements 17 slightly elastic is pinched.
  • the sealing tape 5 and also the outer tape 6 consist of elastic material, preferably plastic, for example polyurethane, wherein here in the sealing strip 13 of the sealing tape 5 inserted or molded linear, longitudinally oriented reinforcements 18, for example Steel wire or Kevlar threads are provided.
  • longitudinal grooves 19 are further provided here on the sealing strip 13, which a separate processing of the inside of the cylinder tube 1 facing Allow areas of the sealing strip 13 to improve the seal or facilitate.
  • the outer band 6 is in the longitudinal direction held divided in groove-shaped recesses 20 next to the longitudinal slot 3, wherein the holding strip 14 of the sealing tape 5 on longitudinal extensions 21st is held clamped between the two parts of the outer band 6. Also here there is a purely frictional interaction of the holding elements (or holding areas) 16, 17 on the sealing tape 5 or outer tape 6.
  • FIG. 4 is similar to that of FIG. 2, but here now the one-piece outer band 6 apart from the cooperating holding elements 16, 17 is exempt from the inner sealing tape.
  • Fig. 4 refers to the above explanations for Fig. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Sealing Devices (AREA)
EP99890131A 1998-07-01 1999-04-21 Vérin à pression fluidique sans tige Ceased EP0976930A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT44198U 1998-07-01
AT0044198U AT2689U1 (de) 1998-07-01 1998-07-01 Kolbenstangenloser druckmittelzylinder

Publications (2)

Publication Number Publication Date
EP0976930A2 true EP0976930A2 (fr) 2000-02-02
EP0976930A3 EP0976930A3 (fr) 2002-04-03

Family

ID=3490703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99890131A Ceased EP0976930A3 (fr) 1998-07-01 1999-04-21 Vérin à pression fluidique sans tige

Country Status (4)

Country Link
US (1) US6283010B1 (fr)
EP (1) EP0976930A3 (fr)
JP (1) JP2000035010A (fr)
AT (1) AT2689U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004003620B4 (de) * 2004-01-16 2011-12-08 Airtec Pneumatic Gmbh Dichtung bei kolbenstangenlosen Zylindern

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1896729A1 (fr) * 2005-06-13 2008-03-12 Norgren, Inc. Bande d etancheite chauffee

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3124915C2 (de) * 1981-06-25 1984-10-31 Kaiser, Siegmund H., Ing.(grad.), 7440 Nürtingen Druckmittelzylinder mit einem längsgeschlitzten endseitig verschlossenen Zylinderrohr
DE3124878C1 (de) * 1981-06-25 1982-12-09 Kaiser, Siegmund H., Ing.(grad.), 7440 Nürtingen Druckmittelzylinder
SE8107724L (sv) * 1981-12-22 1983-06-23 Mecman Ab Anordning vid en kolvstangslos tryckmediecylinder
DE3631514A1 (de) * 1986-09-17 1988-03-24 Proma Prod & Marketing Gmbh Druckmittelzylinder
IT1217812B (it) * 1988-06-08 1990-03-30 Univers S P A Dispositivo di tenuta per cilindri pneumatici senz,asta
DE4400454C2 (de) * 1994-01-11 1996-11-07 Invest Tech Ag Kolbenstangenloser Linearantrieb
DE4400453C2 (de) * 1994-01-11 1996-11-07 Maschimpex Handels & Consulting Ag Linearantrieb
DE9410393U1 (de) * 1994-06-28 1994-08-18 Festo Kg, 73734 Esslingen Linearantrieb

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004003620B4 (de) * 2004-01-16 2011-12-08 Airtec Pneumatic Gmbh Dichtung bei kolbenstangenlosen Zylindern

Also Published As

Publication number Publication date
JP2000035010A (ja) 2000-02-02
AT2689U1 (de) 1999-02-25
EP0976930A3 (fr) 2002-04-03
US6283010B1 (en) 2001-09-04

Similar Documents

Publication Publication Date Title
DE3124878C1 (de) Druckmittelzylinder
DE68902187T2 (de) Dichtungsanordnung fuer kolbenstangenlosen pneumatikzylinder.
CH668629A5 (de) Rohrverschraubung mit beruehrungsdichtung.
DE102016102275A1 (de) Radialpresse
DE3502575A1 (de) Kurzhub-spannelement
DE2644533B2 (de) Starrer und im wesentlichen unverformbarer Kolben insbesondere für Hochdruckverdichter sowie Verfahren zu seiner Herstellung
EP0476795A1 (fr) Vérin sans tige
EP0515715A1 (fr) Entraînement linéaire
DE3920161C2 (de) Spreizkeilvorrichtung, insbesondere für Kraftfahrzeugbremsen
DE2706163C2 (de) Zylinder mit einem darin beweglichen Kolben
DE3111997A1 (de) Flanschverbindungsvorrichtung
DE2718414C2 (de) Dichtungsanordnung an einer Walze
EP0976930A2 (fr) Vérin à pression fluidique sans tige
DE3918891A1 (de) Dichtring
EP0886096B1 (fr) Dispositif de connexion et distributeur de fluide comportant un ou plusieurs de ces dispositifs de connexion
DE102013015895B4 (de) Pressfitting und Verbindungsanordnung mit einem solchen Pressfitting
EP0969213B1 (fr) Vérin à pression fluidique sans tige
DE69906199T2 (de) Kolben-Zylinder-Stellglied für einen Schlittentisch
DE3821873A1 (de) Dichtungsanordnung
EP0472862B1 (fr) Vérin à piston sans tige alimenté par fluide
DD243966A5 (de) Kolbenstangenloser zylinder
DE4220415A1 (de) Zylinder, insbesondere für eine hydraulische Servolenkung
DE19506683A1 (de) Kolbenstangen-Dichtung und Dichtelement für Kolbenstangendichtungen
AT404393B (de) Arbeitszylinder
DE9410393U1 (de) Linearantrieb

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

Kind code of ref document: A2

Designated state(s): AT CH DE ES FR GB IT LI

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HYGRAMA AG

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20020923

AKX Designation fees paid

Free format text: AT CH DE ES FR GB IT LI

RBV Designated contracting states (corrected)

Designated state(s): AT CH DE ES FR GB IT LI NL SE

17Q First examination report despatched

Effective date: 20030514

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HYGRAMA AG

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20040209