EP0504450A1 - Vérin de fluide hydraulique sans tige - Google Patents

Vérin de fluide hydraulique sans tige Download PDF

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Publication number
EP0504450A1
EP0504450A1 EP91104302A EP91104302A EP0504450A1 EP 0504450 A1 EP0504450 A1 EP 0504450A1 EP 91104302 A EP91104302 A EP 91104302A EP 91104302 A EP91104302 A EP 91104302A EP 0504450 A1 EP0504450 A1 EP 0504450A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
drive piston
cylinder tube
pressure medium
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
EP91104302A
Other languages
German (de)
English (en)
Other versions
EP0504450B1 (fr
Inventor
Uwe Albrecht
Falko Diebel
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.)
WAGGONBAU AMMENDORF GmbH
Original Assignee
WAGGONBAU AMMENDORF 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 WAGGONBAU AMMENDORF GmbH filed Critical WAGGONBAU AMMENDORF GmbH
Priority to DE9191104302T priority Critical patent/DE59100122D1/de
Priority to AT91104302T priority patent/ATE89649T1/de
Priority to EP91104302A priority patent/EP0504450B1/fr
Publication of EP0504450A1 publication Critical patent/EP0504450A1/fr
Application granted granted Critical
Publication of EP0504450B1 publication Critical patent/EP0504450B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a rodless pressure medium cylinder, in which a working piston with two end faces corresponding to the hollow profile is displaceably guided in the axial direction by the pressure of a pressure medium in a hollow profile closed at the end and over the circumference, while a driving carriage is arranged on the hollow profile, which is also in is axially displaceable.
  • Rodless pressure medium cylinders can be used in all areas of technology and have the advantage over conventional working cylinders that they only require a small installation length and that the disadvantages associated with a piston rod emerging from the cylinder, such as buckling of the piston rod or the like, are avoided.
  • a large number of solutions for rodless pressure medium cylinders are already known, which are generally referred to in the technical field as band cylinders and, like the pressure medium cylinder disclosed in EP-PS 69 199, essentially consist of an end-closed, longitudinally slotted cylinder tube in which a piston seals is guided longitudinally.
  • a force transmission element connected to the piston protrudes through the longitudinal slot in the cylinder tube, the longitudinal slot of the cylinder tube being sealed on both sides of the piston by a sealing tape which is arranged in the interior of the cylinder tube and is passed under the force transmission element and is held in contact with the cylinder tube inner wall.
  • the longitudinal slot is also covered from the outside by a flexible cover band which is guided on the outside of the cylinder tube over the force transmission element or through it and which is covered by a Band expansion part on the power transmission element is arched wedge-like beyond the cylinder tube surface.
  • the piston movement can then be transmitted to the part to be moved with the cylinder by means of a driver which is longitudinally displaceable and is placed on the cover band and has a wedge-shaped concave counter-shape on its underside.
  • a rodless pressure medium cylinder is the so-called magnetic cylinder, which, like the cylinder known from DE-OS 3 240 105, consists of a cylinder sleeve which is closed at the ends and over the circumference and in which a drive piston is longitudinally displaceable, and there is a driver piston surrounding the cylinder liner. Both the drive piston and the driver piston each have permanent magnets which couple the driver piston to the drive piston by their attractive forces such that any movement of the drive piston caused by pressurization is transmitted to the driver piston.
  • a web-like force transmission element protruding from the longitudinal slot of the cylinder tube is fastened to the drive piston and can be moved within the longitudinal slot in accordance with the piston movement.
  • it is not possible to apply high pressures to the cylinder since this would lead to the bulging of the bellows and thus to malfunctions of the cylinder.
  • the folds of the bellows are subject to high wear when used frequently, which results in a short lifespan for the bellows or the entire cylinder.
  • the build-up of the bellows at the cylinder ends should also be mentioned as disadvantageous, since the stroke length is always considerably smaller compared to the cylinder length, particularly in the case of long cylinders.
  • the object of the invention is therefore to provide a rodless pressure medium cylinder of the type mentioned, which excludes pressure medium leaks with a simple structure and low production costs and can also be used in higher pressure ranges for increased power transmissions and is distinguished by a long service life.
  • the rodless pressure medium cylinder shown in FIGS. 1 to 3 consists, in a known manner, of a hollow profile 1 closed at the end and over the circumference, in which a drive piston 9 with two end faces 12 corresponding to the hollow profile 1; 13 is displaceably guided in the axial direction by the pressure of a pressure medium and from a driver slide 23 arranged on the hollow profile 1, which is also longitudinally displaceable in the axial direction.
  • the drive piston 9 has between its end faces 12; 13 a cross-section deviating from the profile of its central part 18, with which the hollow profile 1, which is made of an elastic material, can be deformed locally in each piston position, the drive piston 9 being permanently positively connected to the driving carriage 23 via this local deformation 2 and at the same time as direct power transmission element is formed. It has proven to be particularly advantageous to design the closed hollow profile 1 of the pressure medium cylinder as a cylinder tube, as shown in FIGS. 1 and 2, and the drive piston 9 from two cylindrical piston ends 10; 11 to form with circular end faces, which via axial piston pin 16; 17 of the same length are connected to the middle part 18 of the drive piston 9.
  • the cross section of the middle part 18 has the shape of an ellipse, the circumferential dimension of which corresponds exactly to the dimension of the inner circumference of the cylinder tube, although other ones, not shown, are also shown.
  • Cross-sectional shapes for the central part 18 of the drive piston 9, for example arc-shaped triangular, eccentric or egg-shaped cross-sections, or also variants of the drive piston 9 are conceivable in which the part with a different cross section is arranged at the beginning or at the end of the drive piston 9.
  • a cylinder tube as a closed hollow profile
  • square, rectangular, triangular or elliptical profiles could of course also be used in embodiments that are not further illustrated, as it would also be conceivable to provide a one-part drive piston instead of a three-part drive piston 9, which fulfills the function described.
  • Both ends of the cylinder tube, as shown in FIG. 1 at least on one side, are sealed at the front end by means of flanges 3 each provided with a pressure medium connection 4, which in a manner known per se by means of tie rods 5 which are fixed at regular intervals on their circumference and run parallel to the cylinder tube; 6; 7; 8 are braced against each other.
  • tie rods 5 each offset by 90 o of the full circle of 360 o has been found ; 6; 7; 8 proved to be advantageous, of which at least two tie rods 5 and 7, which are arranged offset from each other by 180 o of the full circle of 360 o , as can be seen in FIG. 3, are at the same time designed as guide columns and as anti-rotation device for the driving carriage 23. If necessary, however, it is also possible to use two, three or more than four tie rods, any number of which can also be designed as guide columns.
  • the flange-tie rod system also serves to stabilize the entire pressure cylinder. As can be seen in particular from FIG.
  • the central part 18 of the drive piston 9 has in the areas of the greatest positive deviation from the circular cross section of the piston ends 10; 11 additionally friction-reducing bearing elements 21; 22, which ensure that the Set the power transmission primarily rolling friction occurs and sliding friction between the drive piston 9 and the cylinder tube is excluded.
  • these bearing elements 21; 22 designed as a ball bearing with an involute peripheral surface, which within axial longitudinal slots 19; 20 are mounted in the middle part 18 of the drive piston 9 and the peripheral surfaces of which slightly exceed the peripheral surface of the middle part 18 of the drive piston 9.
  • the bearing elements 21; In an alternative embodiment, however, 22 can also be designed as rollers or balls with corresponding bearings on the central part 18 of the drive piston 9.
  • the carrier slide 23, which preferably has a rectangular hollow cross section, is mounted on the cylinder tube on a plurality of translation elements surrounding the cylinder tube, in order to avoid sliding friction between the cylinder tube and the carrier slide 23 here too.
  • the carrier slide 23 there are in the area of the greatest positive deviation of the cylinder tube from the circular cross-section pairs of ball bearings 24; 24 'and 26; 26 ', the individual ball bearings of which are each mounted at the same height and at a distance from one another, and each of which has a ball bearing 24 and 26 in front and a ball bearing 24' and 26 'behind the local deformation 2 of the cylinder tube which is designed as a bulge-like extension .
  • the rodless pressure medium cylinder according to the invention can be operated with any gaseous or liquid pressure medium and can be used both in the fields of technology in which conventional pressure medium cylinders with piston rods have been used up to now and in all known application areas rodless working cylinders.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP91104302A 1991-03-20 1991-03-20 Vérin de fluide hydraulique sans tige Expired - Lifetime EP0504450B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE9191104302T DE59100122D1 (de) 1991-03-20 1991-03-20 Kolbenstangenloser druckmittelzylinder.
AT91104302T ATE89649T1 (de) 1991-03-20 1991-03-20 Kolbenstangenloser druckmittelzylinder.
EP91104302A EP0504450B1 (fr) 1991-03-20 1991-03-20 Vérin de fluide hydraulique sans tige

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91104302A EP0504450B1 (fr) 1991-03-20 1991-03-20 Vérin de fluide hydraulique sans tige

Publications (2)

Publication Number Publication Date
EP0504450A1 true EP0504450A1 (fr) 1992-09-23
EP0504450B1 EP0504450B1 (fr) 1993-05-19

Family

ID=8206544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104302A Expired - Lifetime EP0504450B1 (fr) 1991-03-20 1991-03-20 Vérin de fluide hydraulique sans tige

Country Status (3)

Country Link
EP (1) EP0504450B1 (fr)
AT (1) ATE89649T1 (fr)
DE (1) DE59100122D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0781931A1 (fr) * 1995-12-27 1997-07-02 Howa Machinery, Ltd. Dispositif d'entraînement linéaire
AT407430B (de) * 1999-01-22 2001-03-26 Hygrama Ag Kombiniertes antriebs- und führungssystem für eine zu bewegende last

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018908A1 (fr) * 1979-04-27 1980-11-12 Planet Wattohm Moteur linéaire pneumatique
DE3302444A1 (de) * 1983-01-26 1984-07-26 Rudolf Dipl.-Ing. 3000 Hannover Goldin Pneumatischer oder hydraulischer linearantrieb

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6241407A (ja) * 1985-08-19 1987-02-23 Ckd Corp ロツドレスシリンダ
JPH01108404A (ja) * 1987-10-21 1989-04-25 Akio Matsui ロッドレスシリンダ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018908A1 (fr) * 1979-04-27 1980-11-12 Planet Wattohm Moteur linéaire pneumatique
DE3302444A1 (de) * 1983-01-26 1984-07-26 Rudolf Dipl.-Ing. 3000 Hannover Goldin Pneumatischer oder hydraulischer linearantrieb

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0781931A1 (fr) * 1995-12-27 1997-07-02 Howa Machinery, Ltd. Dispositif d'entraînement linéaire
US5701798A (en) * 1995-12-27 1997-12-30 Howa Machinery, Ltd. Linear actuating device
AT407430B (de) * 1999-01-22 2001-03-26 Hygrama Ag Kombiniertes antriebs- und führungssystem für eine zu bewegende last

Also Published As

Publication number Publication date
EP0504450B1 (fr) 1993-05-19
DE59100122D1 (de) 1993-06-24
ATE89649T1 (de) 1993-06-15

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