EP0069199A1 - Vérin à fluide - Google Patents

Vérin à fluide Download PDF

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Publication number
EP0069199A1
EP0069199A1 EP82103075A EP82103075A EP0069199A1 EP 0069199 A1 EP0069199 A1 EP 0069199A1 EP 82103075 A EP82103075 A EP 82103075A EP 82103075 A EP82103075 A EP 82103075A EP 0069199 A1 EP0069199 A1 EP 0069199A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
cylinder tube
sealing
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.)
Granted
Application number
EP82103075A
Other languages
German (de)
English (en)
Other versions
EP0069199B1 (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 Prod & Marketing GmbH
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 Prod & Marketing GmbH, Proma Produkt- und Marketing-Gesellschaft Mbh filed Critical Proma Prod & Marketing GmbH
Priority to AT82103075T priority Critical patent/ATE10128T1/de
Publication of EP0069199A1 publication Critical patent/EP0069199A1/fr
Application granted granted Critical
Publication of EP0069199B1 publication Critical patent/EP0069199B1/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 an end-closed, longitudinally slotted cylinder tube, in which a sealed piston is guided so as to be longitudinally displaceable, which carries a force-transmitting element projecting outward through the longitudinal slot, the longitudinal slot of the cylinder tube in the longitudinal direction of the cylinder on both sides of the piston by an arranged in the inside of the cylinder tube, below the sealing band, which is guided through the force transmission element and held in abutment against the inner wall of the cylinder tube, and is covered on the outside of the cylinder tube by a flexible covering band which passes over or through the force transmission element.
  • Hydraulically or pneumatically operated working cylinders of this type have no piston rod and are therefore characterized by a short installation length and the elimination of the disadvantages which are otherwise associated with the piston rod emerging from the cylinder. For example, damage to the surface, buckling of the piston rod etc.
  • the force exerted on the piston by the pressure medium is transmitted to the device to be driven via the force transmission element which is arranged directly on the piston and protrudes outward through the longitudinal slot of the cylinder tube.
  • the pressure chamber located on both sides of the piston is sealed in the axial direction of the cylinder tube by sealing rings or sleeves of the piston, while the longitudinal slot of the cylinder tube is sealed in this area by the sealing tape, which is passed under the force transmission element in the unpressurized area between the piston seals.
  • the sealing strip which has an approximately rectangular cross-sectional shape, lies in a longitudinal groove arranged in the area of the longitudinal slot, which forms flat contact surfaces and lateral guide surfaces for the sealing strip.
  • the sealing tape is pressed against the bearing surfaces by the pressure medium pressure prevailing in the pressure chambers, however, as practical experience has shown, precautions must be taken to prevent the sealing tape from sagging into the pressure chamber when not under pressure, because otherwise A temporary leak occurs when the pressure medium is applied. To this extent, however, no precautions have been taken with this pressure medium cylinder.
  • a pressure medium cylinder known from DE-PS 846 493, in which a sealing strip with an essentially U-shaped cross-sectional shape is used, the flanges of which can enter into corresponding recesses on the inner wall of the cylinder tube, in order to improve the sealing of the pressure spaces and at the same time to increase the resistance of the cylinder tube against expansion.
  • the production of the parallel recesses on the inner wall of the cylinder tube is associated with considerable manufacturing outlay, apart from the fact that the piston requires special training in order to properly insert the sealing tape with its flanges into the recess.
  • the arrangement has already been made in a pressure medium cylinder known from DE-PS 21 62 572 in such a way that the cylinder consists of a non-magnetized material and at least one of the two parallel wall areas delimiting the longitudinal slot magnetic body has, which attract the sealing material of the sealing tape consisting of magnetizable material.
  • a metallic sealing tape is not very suitable for sealing liquids, so that only compressed air is practically possible as a pressure medium.
  • the magnetic body used to hold the sealing tape serve, attract iron shavings, which can lead to considerable interference.
  • the thin metal tape which serves as a sealing tape
  • the magnetic body which entails the risk that the sealing tape can occasionally experience a lateral offset with respect to the longitudinal slot, which can lead to the so-called tape explosions which are feared because of the associated risk of accidents.
  • this pressure medium cylinder it is known to provide on the outside of the cylinder tube another, also covering the longitudinal slot on both sides of the power transmission element, which has the task of keeping the longitudinal slot closed to the outside, so that the penetration of dirt into to prevent the longitudinal slot .
  • This metallic masking tape is also held by a magnetic body. The magnetic holder both inside and outside the cylinder tube and the profile-ground steel strips require a large amount of production.
  • a pressure medium cylinder is known from DD-PS 83 708, in which a relatively thin cylindrical lining of the cylinder interior made of plastic material or metal is provided for sealing the longitudinal slot, the longitudinal edges of which either abut one another or overlap one another, the lining being sealed by self-resilience is pressed against the wall of the cylinder.
  • the longitudinal slot is protected by rubber strips against the ingress of dust or the like are pressed together under the effect of their own elasticity.
  • a lining arranged in the cylinder interior influences the sealing conditions of the pressure chambers through the piston; it is also subject to considerable wear resulting from the piston movement, both of which are undesirable.
  • the object of the invention is therefore to provide a pressure medium cylinder of the type mentioned, which is characterized by a perfect sealing of the pressure chambers located on both sides of the piston with little manufacturing effort.
  • the pressure medium cylinder according to the invention is characterized in that the sealing tape is held in contact with an associated sealing surface in the longitudinal direction of the cylinder on both sides of the piston by the cover tape by means of interacting, detachable connecting elements which project through the longitudinal slot and extend over the length of the tape, and the connecting elements depending on the longitudinal movement of the piston in each case continuously in front of that piston side which is facing the shrinking cylinder space, detached from one another and brought into engagement with each other on the other piston side.
  • the pressure medium cylinder is therefore also suitable for liquid pressure medium excellently suitable. Since the sealing tape is held through the already existing longitudinal slot, there is also no need for separate mounting elements to be arranged on the cylinder, with the result that the production outlay for the new pressure medium cylinder can be kept very small.
  • the connecting elements consist of at least one web, which runs in the longitudinal direction of the cylinder, is arranged on the sealing band or the cover band in the radial direction of the cylinder tube, is profiled in cross section, and an associated web, which likewise runs in the longitudinal direction of the cylinder on the other band, corresponds to the web cross section form-fitting encompassing, also in cross-section profiled longitudinal groove, the side walls of which can be elastically expanded to accommodate the web.
  • the profile cross section of the longitudinal groove and / or of the web can then have a wedge-shaped part facing the respective band, radially parallel to the cylinder, essentially parallel, straight-flanked part, while the web on its, radially to the cylinder valve Directed and facing away from the associated band has a radially converging insertion part, which facilitates the joining of the connecting elements and their interlocking can be improved.
  • the sealing tape expediently has a guide part, which is supported on two bearing surfaces of the cylinder tube on both sides of the longitudinal slot and is laterally guided by radially arranged guide surfaces and on which the associated connecting element is arranged.
  • this guide part in cooperation with the bearing surfaces can effect the entire seal, but an improvement in the sealing conditions can be achieved if the guide part on the side of the guide part facing the interior of the cylinder tube, symmetrically to the plane of symmetry of the sealing tape, has two elastically movable sealing lips are connected, which cooperate with sealing surfaces of the cylinder tube wall which are arranged, if appropriate, recessed in the cylinder tube.
  • sealing lips are advantageously movably held at their roots on the guide part and have a wedge-shaped decreasing cross-sectional shape when directed away from their roots.
  • the surface of the sealing tape facing the cylinder axis can be designed to complement the inner circumferential shape of the interior of the cylinder tube.
  • the force transmission element has a band-expanding part which extends in the longitudinal direction of the cylinder tube on both sides and which lies between the cover band and the sealing band.
  • the force transmission element can be on both sides in the longitudinal direction of the cylinder tube. each have a pressure element that acts on the cover band from the outside and presses it against the outer wall of the cylinder tube, which is arranged in each case in the length region of the piston and, in cooperation with the piston, brings the connecting elements into engagement with one another on the piston side that follows when the piston moves.
  • the masking tape and / or the sealing tape can consist of an elastic plastic material, the properties of which are selected with regard to the mechanical stresses occurring and the pressure medium used. In principle, however, it is also conceivable to alternatively use fabric-reinforced rubber material or the like for this purpose.
  • the pressure medium cylinder shown in Figures 1 to 3 has a cylinder tube 1, which contains an interior 2 in the form of an eccentrically arranged cylinder bore and is formed with a continuous longitudinal slot 3.
  • the cylinder tube 1 is pressure-tightly closed at both ends by end caps 4; in it a piston 5 is slidably guided, which carries a sealing collar at each end at 6 and 7 and is thus sealed against the inner wall of the cylinder bore 2.
  • the piston is designed at 8 with a reduced diameter.
  • a force transmission element 9 is screwed to it, which has a web-like part 10 which is guided outwards through the longitudinal slot 3 to the side and to which a bracket 11, which laterally overlaps the cylinder tube 1, is connected, on which two parallel flanges arranged at a distance from one another 12 sit, which for coupling the power transmission element 9 to a device, not shown, actuated by the pressure medium cylinder serve.
  • the bracket 11, which has an essentially U-shaped cross-sectional shape, is provided in the region of its legs 13 with two guide strips 14 inserted into corresponding longitudinal grooves, which are adjustable by means of set screws 15 and are displaceably guided in corresponding longitudinal grooves 16 of the cylinder tube 1.
  • the two legs 13 can also be extended downwards, as indicated at 17 in FIG. 2, and carry additional guide strips 14a, which interact with corresponding longitudinal grooves 16a.
  • the guide strips 14 result in a parallel guide for the force transmission element 9 and at the same time prevent the cylinder tube 1 from expanding in the region of the longitudinal slot 3.
  • a sealing tape 18 Arranged in the cylinder interior 2 is a sealing tape 18 consisting of a flexible, elastic plastic material, which is anchored at the ends in the two end caps 4.
  • the sealing tape 18 serves to seal the longitudinal slot in the region of the pressure chambers 19, 20 between the piston 5 and the two end caps 4 and the pressure medium cylinder and extends over the entire length of the cylinder tube 1.
  • the sealing tape 18 has a base or guide part 21 of a substantially rectangular cross-sectional shape, which can rest on both sides of the longitudinal slot 3 'on a flat bearing surface 22 arranged at the base of a longitudinal groove and is guided laterally by two guide surfaces 23 formed by the groove side walls.
  • the guide Part two On the side facing the cylinder interior 2 are on the guide Part two arranged in cross section tapering and wedge-shaped elastic sealing lips 24, which at its root - at 250 - the guide part 21 are integrally formed.
  • the sealing lips 24 bear against associated sealing surfaces 25 incorporated into the wall of the cylinder interior 2, the arrangement being such that the sealing tape 18 complements the outline of the cylinder interior 2 without gaps in the manner shown in FIG. 3 in particular.
  • the sealing tape 18 On the upper side of the guide part 21, the sealing tape 18 carries a molded central web 26 forming a connecting element, which projects into the longitudinal slot 3 and is arranged symmetrically to this.
  • the longitudinal slot 3 On the outside of the cylinder tube 1, the longitudinal slot 3 is covered by a flexible cover band 27 consisting of a flexible elastic plastic material, which also extends over the length of the cylinder tube 1 and is anchored in the end caps 4 at both ends.
  • the cover band 27 is approximately rectangular in cross section and lies in a corresponding longitudinal groove 28 of the cylinder tube 1, from the bottom of which the longitudinal slot 3 opens.
  • a second connecting element is arranged in the form of a longitudinal groove 30 delimited by two molded-on parallel legs 29, which has a substantially U-shaped cross section and, like the web 26, extends over the entire length of the cover band 27 or Sealing tape 18 extends.
  • the web 26 is formed at its root with a parallel and straight-flanked part 31, to which a wedge-shaped part that widens outwards ger part 32 connects, followed by a converging, in this case approximately trapezoidal in cross section, but possibly also rounded insertion part 33.
  • the legs 29 delimiting the longitudinal groove 30 carry on their inside wedge-shaped parts 34 which lie opposite one another and converge towards the groove opening.
  • the arrangement is such that the web 26 can be pressed continuously into the longitudinal groove 30 in the manner shown in FIG. 4 with elastic lateral retraction of the legs 29 of the cover band 27, with which a firm connection between the cover band 27 and the Sealing tape 18 results because the wedge surfaces 34, 32 engage behind one another in the assembled state of the connecting elements and produce a positive connection.
  • the chamfered insertion part 33 facilitates the insertion of the web 26 into the longitudinal groove 30, while the straight-sided parts 31 and 34a ensure that the wedge-shaped parts 32, 34 can come into contact with one another without any problems.
  • a plurality of webs and longitudinal grooves arranged parallel to one another could of course also be provided in another embodiment, not shown, as would also be conceivable for the web 26 on the cover band 27 and the longitudinal groove 30 instead to provide on the sealing tape 18.
  • the sealing tape 18 is passed through an opening 35 (FIGS. 1, 2) below the force transmission element 9, which has a tape expansion part 36, which is arranged in the region of the piston part 8 and extends in a wedge-shaped manner on both sides in the longitudinal direction of the cylinder tube, over the top of which the cover tape 27 is guided, such that that the band expansion part 36 lies between the two bands 18, 27.
  • the force transmission element 9 carries, in the region of its two ends, a pressure element 37 which acts on the cover band 27 and presses it against the cylinder tube wall, in the manner of a roller, which - as can be seen from FIG. 1 - is essentially above the sleeve 6 or 7 supporting piston part is arranged.
  • the pressure medium cylinder can be operated with any gaseous or liquid pressure medium.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
EP82103075A 1981-06-25 1982-04-09 Vérin à fluide Expired EP0069199B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82103075T ATE10128T1 (de) 1981-06-25 1982-04-09 Druckmittelzylinder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3124878 1981-06-25
DE3124878A DE3124878C1 (de) 1981-06-25 1981-06-25 Druckmittelzylinder

Publications (2)

Publication Number Publication Date
EP0069199A1 true EP0069199A1 (fr) 1983-01-12
EP0069199B1 EP0069199B1 (fr) 1984-10-31

Family

ID=6135303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103075A Expired EP0069199B1 (fr) 1981-06-25 1982-04-09 Vérin à fluide

Country Status (5)

Country Link
EP (1) EP0069199B1 (fr)
JP (2) JPS5850302A (fr)
AT (1) ATE10128T1 (fr)
DE (1) DE3124878C1 (fr)
ZA (1) ZA823755B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002306A1 (fr) * 1981-12-22 1983-07-07 Mecman Ab Dispositif pour cylindre a fluide pressurise sans bielle de piston
US4617857A (en) * 1983-10-21 1986-10-21 Wabco Westinghouse Steuerungstechnik Gmbh Sealing arrangement for a longitudinally-slotted pressure cylinder closed on the ends
GB2202587A (en) * 1987-03-12 1988-09-28 Ckd Corp Rod-less piston and cylinder assembly
EP0309613A1 (fr) * 1987-10-02 1989-04-05 Höfler & Kobler Handhabungsautomaten Bielle de paralèllogramme pour entrainement linéaire
EP0531131A1 (fr) * 1991-09-06 1993-03-10 Smc Corporation Vérin sans tige
EP0684390A1 (fr) 1994-05-18 1995-11-29 Hygrama Ag Vérin à piston sans tige
EP0976930A3 (fr) * 1998-07-01 2002-04-03 Hygrama Ag Vérin à pression fluidique sans tige
US9061782B2 (en) 2009-03-26 2015-06-23 Nestec S.A. Fitment indexer for a pouch filler

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3429783A1 (de) * 1984-08-13 1986-02-20 Herion-Werke Kg, 7012 Fellbach Kolbenstangenloser zylinder
JPS6158846A (ja) * 1984-08-31 1986-03-26 株式会社竹中工務店 溶融スラグの発泡方法
DE3436977A1 (de) * 1984-10-09 1986-04-10 Antriebs Steuerungstech Ges Linearantrieb
JPS6285704U (fr) * 1985-11-15 1987-06-01
JPH0717410B2 (ja) * 1986-01-13 1995-03-01 日本磁力選鉱株式会社 製鋼スラグの改質方法
DE3609605A1 (de) * 1986-03-21 1987-09-24 Festo Kg Linearmotor
DE3631514A1 (de) * 1986-09-17 1988-03-24 Proma Prod & Marketing Gmbh Druckmittelzylinder
JPH0742966B2 (ja) * 1987-01-30 1995-05-15 豊和工業株式会社 ロツドレスシリンダ
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
JPH0674801B2 (ja) * 1987-01-30 1994-09-21 豊和工業株式会社 ロツドレスシリンダ
JPH02236214A (ja) * 1989-03-10 1990-09-19 Mitsubishi Mining & Cement Co Ltd 製鋼、溶銑予備処理スラグの改質方法
IE920673A1 (en) * 1991-03-04 1992-09-09 Ascolectric Ltd Linear drive
SE468446B (sv) * 1991-10-28 1993-01-18 Leif Gullblom Kopplingsanordning vid sammanstaellning av en kolvcylinder eller kolvstaangsloes cylinder med ett motsvarande arrangemang i form av en cylinder eller en gejdskena
SE9103142L (sv) * 1991-10-28 1993-01-18 Leif Gullblom Kopplingsanordning vid gejdskena
JP3001173U (ja) * 1994-02-18 1994-08-23 有限会社野々川商事 染毛用ブラシ
DE9410393U1 (de) * 1994-06-28 1994-08-18 Festo Kg, 73734 Esslingen Linearantrieb
JP2647036B2 (ja) * 1994-11-04 1997-08-27 豊和工業株式会社 ロッドレスシリンダ
DE19605387C2 (de) * 1996-02-14 1998-01-15 Neff Antriebstech Automation Führungseinrichtung mit Abdeckband
DE202006006447U1 (de) 2006-04-21 2006-07-13 Festo Ag & Co. Fluidbetätigte Linearantriebsvorrichtung
CN108380777B (zh) * 2018-02-12 2024-07-19 珠海格力精密模具有限公司 缸体的安装结构及具有其的模具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1475809A1 (de) * 1964-09-04 1969-03-13 Hermann Rasper Vorrichtung zum Versetzen eines ein Aggregat tragenden Kolbens in jede gewuenschte Lage an einem rohrfoermigen Zylinder entlang
FR2209533A1 (fr) * 1972-12-11 1974-07-05 Hawley Manufacturing Corp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD83708A (fr) *
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
US3893378A (en) * 1973-11-23 1975-07-08 Delbert C Hewitt Double acting fluid cylinder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1475809A1 (de) * 1964-09-04 1969-03-13 Hermann Rasper Vorrichtung zum Versetzen eines ein Aggregat tragenden Kolbens in jede gewuenschte Lage an einem rohrfoermigen Zylinder entlang
FR2209533A1 (fr) * 1972-12-11 1974-07-05 Hawley Manufacturing Corp

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002306A1 (fr) * 1981-12-22 1983-07-07 Mecman Ab Dispositif pour cylindre a fluide pressurise sans bielle de piston
EP0082829B1 (fr) * 1981-12-22 1986-04-02 AB Mecman Dispositif associé à un cylindre à pression de fluide sans tige de piston
US4617857A (en) * 1983-10-21 1986-10-21 Wabco Westinghouse Steuerungstechnik Gmbh Sealing arrangement for a longitudinally-slotted pressure cylinder closed on the ends
EP0142665B1 (fr) * 1983-10-21 1987-01-14 WABCO Westinghouse Steuerungstechnik GmbH & Co. Cylindre à fluide de pression ayant un cylindre fendu fermé aux deux extrémités
GB2202587A (en) * 1987-03-12 1988-09-28 Ckd Corp Rod-less piston and cylinder assembly
GB2202587B (en) * 1987-03-12 1991-06-05 Ckd Corp Rod-less piston and cylinder assembly
EP0309613A1 (fr) * 1987-10-02 1989-04-05 Höfler & Kobler Handhabungsautomaten Bielle de paralèllogramme pour entrainement linéaire
EP0531131A1 (fr) * 1991-09-06 1993-03-10 Smc Corporation Vérin sans tige
EP0684390A1 (fr) 1994-05-18 1995-11-29 Hygrama Ag Vérin à piston sans tige
EP0684390B1 (fr) * 1994-05-18 1998-09-30 Hygrama Ag Vérin à piston sans tige
EP0976930A3 (fr) * 1998-07-01 2002-04-03 Hygrama Ag Vérin à pression fluidique sans tige
US9061782B2 (en) 2009-03-26 2015-06-23 Nestec S.A. Fitment indexer for a pouch filler

Also Published As

Publication number Publication date
ZA823755B (en) 1983-03-30
JPS5850302A (ja) 1983-03-24
JPS6216321B2 (fr) 1987-04-11
JPS6367041B2 (fr) 1988-12-23
JPS62155307A (ja) 1987-07-10
EP0069199B1 (fr) 1984-10-31
ATE10128T1 (de) 1984-11-15
DE3124878C1 (de) 1982-12-09

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