EP0384032B1 - Vérin à fluide sous pression - Google Patents

Vérin à fluide sous pression Download PDF

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Publication number
EP0384032B1
EP0384032B1 EP89123620A EP89123620A EP0384032B1 EP 0384032 B1 EP0384032 B1 EP 0384032B1 EP 89123620 A EP89123620 A EP 89123620A EP 89123620 A EP89123620 A EP 89123620A EP 0384032 B1 EP0384032 B1 EP 0384032B1
Authority
EP
European Patent Office
Prior art keywords
traction
operated
working cylinder
sheath
pressurised 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.)
Expired - Lifetime
Application number
EP89123620A
Other languages
German (de)
English (en)
Other versions
EP0384032B2 (fr
EP0384032A1 (fr
Inventor
Helmut Göttling
Peter Müller
Rudolf Möller
Gerhard Scharnowski
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.)
Aventics GmbH
Original Assignee
Mannesmann Rexroth Pneumatik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6374736&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0384032(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mannesmann Rexroth Pneumatik GmbH filed Critical Mannesmann Rexroth Pneumatik GmbH
Priority to AT89123620T priority Critical patent/ATE69861T1/de
Publication of EP0384032A1 publication Critical patent/EP0384032A1/fr
Application granted granted Critical
Publication of EP0384032B1 publication Critical patent/EP0384032B1/fr
Publication of EP0384032B2 publication Critical patent/EP0384032B2/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
    • F15B15/084—Characterised by the construction of the motor unit the motor being of the rodless piston type, e.g. with cable, belt or chain
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18832—Reciprocating or oscillating to or from alternating rotary including flexible drive connector [e.g., belt, chain, strand, etc.]
    • Y10T74/18848—Reciprocating or oscillating to or from alternating rotary including flexible drive connector [e.g., belt, chain, strand, etc.] with pulley
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20396—Hand operated
    • Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
    • Y10T74/20456—Specific cable or sheath structure

Definitions

  • the invention relates to a pressure-actuated working cylinder according to the preamble of patent claim 1.
  • Such a working cylinder is known from DE-A-2359013.
  • the known design uses a tension element which is formed from a plastic-coated, calibrated steel cable.
  • Such steel cables are subject to a high bending stress during the passage around the deflection roller, so that due to the risk of breakage, the bending stress can only be achieved by a correspondingly large roller diameter.
  • the larger roller diameter necessarily leads to a greater overall height of the working cylinder and is therefore unfavorable for many installation cases. It is of little use, however, that such a steel cable subjected to bending stress can be adequately sealed by the plastic sheathing and by the circular cross-sectional shape. Both the risk of breakage and the necessary larger roll diameter are disadvantageous.
  • Working cylinders are also known which can be provided with smaller reel diameters because a steel band is used instead of the steel cable (DE-A-2404244). In the case of thin steel strips, the bending stress is reduced, but such steel strips must be sealed with lip seals.
  • the lip seals cannot be kept permanently sealed against the media pressure because of the resulting cutting-like edge edges of the rectangular spring steel strip cross section.
  • the thickness of the steel strip cannot be reduced arbitrarily.
  • thinner steel strips are difficult to guide laterally, and on the other hand, the reduced fatigue strength decreases with the reduced thickness.
  • a lateral deflection of the steel band also immediately damages the sealing lips of the seal. This means that thinner steel strips are also prone to breakage and are hardly or only temporarily sealable.
  • a rectangular cross-section of the tension element is subject to the same types of stress and is therefore also prone to breakage, but the tensile and compressive stresses generated are not as high.
  • a rectangular cross-section on the narrow sides can only be sealed for a short time. The narrow side edges of the rectangular cross section also destroy the sealing lips when there is little lateral movement.
  • the invention has for its object to provide a pressure-actuated working cylinder of the type mentioned, which is compact in construction and has a high lifespan, while still reliably sealing the bushing for the tension element.
  • the invention offers in particular the advantage of obtaining a working cylinder which is very flat and whose implementation for the tension element can be sealed very well with simple means. Because the tension element has a cross section with a continuous circumferential line deviating from the circular shape, small rollers can be used as deflection elements. If the tensile element, as specified in the subclaims, is composed of several tensile strands, preferably consisting of a plastic, a particularly high tensile strength of the tensile element is achieved.
  • the tensile cord or the tensile cords is or are surrounded by a jacket made of a plastic material, and the tension element formed from the tensile cord or the tensile cords and the jacket has the cross-sectional shape mentioned above, the combination achieved by high tensile strength of the tensile element and good sealability of the bushings for the tensile element in the covers of the cylinder.
  • a cylinder 10 consisting of a profile tube is shown, which is closed on both ends by a first cover 1 and a second cover 15.
  • a piston 11 is arranged in a sealed, displaceable manner by means of sealing rings 27, 32 mounted in circumferential grooves 28, 33 of the piston 11.
  • the piston 11 divides the cylinder 10 into a first working chamber 40 and a second working chamber 24, 17 located opposite the first working chamber 40, on the other side of the piston 11.
  • the end walls of the cylinder 10 are formed from the covers 1 and 15.
  • the first working chamber 40 can be connected to a pressure medium source or to the atmosphere or to a return via a first pressure medium connection 41 and a valve device (not shown).
  • the second working chamber 24, 17 can be connected to the pressure medium source or to the atmosphere or to the return via a pressure medium connection 16 and the valve device.
  • the first cover 1 has on its side facing the cylinder 10, in the area adjoining the cylinder 10, a running groove 34, in which a groove ring 35 is mounted.
  • the second cover 15 has on its side facing the cylinder 10, in the area adjoining the cylinder 1, a circumferential groove 22 in which a groove ring 23 is mounted.
  • a tubular projection 36 is provided within the first cover 1 and extends in the direction of the first working chamber 40 of the cylinder 10.
  • a tubular projection 18 is provided within the second cover 15, which extends in the direction of the second working chamber 24, 17.
  • a first roller 2 serving as a deflection element is rotatably mounted in the first cover 1 on an axis 3 arranged transversely to the longitudinal axis of the cylinder 10.
  • a second roller 12 serving as a deflection element is also rotatably mounted on an axis 13 arranged transversely to the longitudinal axis of the cylinder 10.
  • the free interior of the tubular molding 36 of the first cover 1 and the free interior of the tubular molding 18 of the second cover 15 serve as a first channel 39 and as a second channel 19, through which a tension element 6 is passed.
  • the pulling element 6 is fastened with its one end 30 on one side of the piston 11 in a holder 31 provided in the piston 11.
  • the traction element 6 is guided through the channel 39 in the first cover 1, partially wraps around the first roller 2, is led out of the first cover 1 through a further channel-like recess 4 in the first cover 1 and runs parallel to the outer lateral surface of the cylinder 10 to the second cover 15 out.
  • the pulling element 6 dips into a channel-like recess 14 of the second cover 15, partially wraps around the second roller 12, emerges from the second channel 19 of the second cover 15 and is at its other end 29 on a holder 26 of the piston 11 on the side attached to the piston 11, which faces the second cover 15.
  • a circumferential groove 37 is provided in the inner wall of the tubular projection 36 of the first cover 1 a sealing ring 38 designed as a groove ring is mounted, which sealingly surrounds the tension element 6 at this point
  • a sealing ring 21 designed as a groove ring is mounted, which at this point surrounds the tension element 6 in a sealing manner, so that no pressure medium from the first working chamber 24, 17 Channel 19, the space for the roller 12 and the second channel 14 in the second cover 15 can escape.
  • the profile tube has a guide 5 for a power take-off 8, which runs in the direction of the longitudinal axis of the cylinder 10.
  • the power take-off 8 is connected to the pulling element 6 in such a way that when the piston 11 is displaced, the power take-off 8 is moved in the longitudinal direction of the cylinder 10 by means of the pulling element 6.
  • the piston 11 has on each of its two end faces a pot-shaped recess 7 and 25, which cooperate with the tubular projections 36 and 18 in such a way that the corresponding tubular projection 36 and 18 into the respective end position of the piston 11 associated recess 7 or 25 of the piston 11 is immersed.
  • cylinder 10 made from a profile tube with a power take-off is shown in section.
  • the cylinder 10 has an oval-shaped cylinder bore, in which the likewise oval piston 11 is slidably arranged.
  • the piston 11 can of course also have any other cross-sectional shape, such as an elliptical or circular cross-sectional shape.
  • the tension element 6 is composed of three tension strands 42, 43 and 44 arranged side by side, which are enclosed by an oval jacket 45 common to all tension strands 42, 43, 44.
  • the jacket 45 can e.g. are made of plastic. Of course, more than three pull strands can also be provided.
  • a single flat ribbon-like tensile strand can be provided, which is surrounded by an oval jacket.
  • the flat strip-like tensile cord can be provided with elevations, depressions or perforations in order to prevent the tensile cord and casing from shifting relative to one another.
  • Openings are provided so that the material of the jacket can pass through the openings during the sheathing process, web-like connecting pieces being formed between the jacket part on one side of the tension cord and the jacket part on the side of the tension cord facing away from this side.
  • the piston 11 and also the tension element 6 are arranged in the cylinder 10 in such a way that the plane of their largest diameter is essentially parallel to the transverse axis of the guide 9 for the force consumer 8 which runs in the direction of the longitudinal axis of the cylinder 10.
  • a pivot point 46 for the tension element 6 on the power take-off 8 is provided at a point on the power take-off 8 which is located inside the guide 5 near the outer circumferential surface of the cylinder 10.
  • the essence of the invention can be seen in the cross-sectional shape of the tension element 6, the tension element 6 having a cross-section with a continuous circumferential line deviating from the circular shape.
  • the extent of the cross section transverse to the plane in which the tension element 6 is guided should be considerably larger than in the direction perpendicular thereto.
  • the pull strands 42, 43, 44 can be made of a metallic material, e.g. Steel, or from a plastic, e.g. Aramid fiber.
  • the sheath 45 surrounding the tension cord or the tension cords 42, 43, 44 preferably consists of a plastic material, such as e.g. Polyurethane.
  • the piston 11 has a cross-sectional shape that deviates from the circular shape, an anti-rotation device for the piston 11 is achieved. At the same time, a flat design of the working cylinder is achieved by this measure.
  • the passage cross section of the sealing rings 38, 21 in the through openings for the tension element 6 is adapted to the profile of the tension element 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Vehicle Body Suspensions (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Claims (10)

1. Vérin de commande actionné par un moyen de pression avec un entraîneur (8) mu par un piston (11) par l'intermédiaire d'un élément de traction (6) flexible guidé par des galets (2, 12) ayant les caractéristiques suivantes :
a) l'élément de traction (6) est guidé de manière étanche par les couvercles (1, 15) du cylindre (10) ;
b) à l'intérieur de la forme de section de l'élément de traction (6), on place au moins une corde de traction (42 ; 43 ; 44) qu'entoure une enveloppe (45) ;
c) on guide l'entraîneur (8) dans un guidage (9) parallèlement à la longueur du cylindre (10) ;
caractérisé en ce que l'élément de traction (6) présente une section dont le périmètre est toujours différent de la forme circulaire avec des transitions adoucies et arrondies, l'extension de la section transversalement au plan dans lequel on guide l'élément de traction (6) est nettement plus grande que celle qui lui est perpendiculaire.
2. Vérin de commande actionné par un moyen de pression selon la revendication 1, caractérisé en ce que l'élément de traction (6) a une section ovale.
3. Vérin de commande actionné par un moyen de pression selon la revendication 1, caractérisé en ce que l'élément de traction (6) présente une section elliptique.
4. Vérin de commande actionné par un moyen de pression selon l'une ou plusieurs des revendications 1 à 3, caractérisé en ce que l'élément de traction (6) se compose de plusieurs cordes de traction (42 ; 43 ; 44) qui sont entourées par une enveloppe (45) commune à toutes ces cordes de traction (42 ; 43 ; 44) englobant ces cordes de traction (42 ; 43 ; 44).
5. Vérin de commande actionné par un moyen de pression selon l'une ou plusieurs des revendications précédentes 1 à 3, caractérisé en ce que l'élément de traction (6) comprend une corde de traction en forme de ruban qui est entourée d'une enveloppe (45).
6. Vérin de commande actionné par un moyen de pression selon la revendication 5, caractérisé en ce que la corde de traction (42 ; 43 ; 44) en forme de ruban présente des surépaisseurs et/ou des creux, qui empêchent un mouvement relatif entre l'enveloppe et la corde de traction.
7. Vérin de commande actionné par un moyen de pression selon la revendication 5, caractérisé en ce que:
a) la corde de traction (42 ; 43 ; 44) présente des interruptions ;
b) par les interruptions passent des pièces d'enveloppe (45) en forme de barreau qui relient la pièce d'enveloppe (45) posée sur une face de la corde de traction (42 ; 43 ; 44) et la pièce d'enveloppe (45) sur la face opposée de la corde de traction (42 ; 43 ; 44).
8. Vérin de commande actionné par un moyen de pression selon l'une ou plusieurs des revendications 1 à 7, caractérisé en ce que la corde de traction, ou les cordes de traction (42,43,44) sont en matériau métallique et l'enveloppe (45) en matière plastique.
9. Vérin de commande actionné selon l'une ou plusieurs des revendications 1 à 8, caractérisé en ce que la corde de traction ou les cordes de traction (42, 43, 44) sont en matière plastique.
10. Vérin de commande actionné par un moyen de pression selon l'une ou plusieurs des revendications 1 à 9, caractérisé en ce que le piston (11) et au moins la zone guidant le piston (11) de la chambre interne du vérin (10), présentent une section avec un périmètre qui diffère toujours de la forme circulaire.
EP89123620A 1989-02-23 1989-12-21 Vérin à fluide sous pression Expired - Lifetime EP0384032B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89123620T ATE69861T1 (de) 1989-02-23 1989-12-21 Druckmittelbetaetigbarer arbeitszylinder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905561 1989-02-23
DE3905561A DE3905561C2 (de) 1989-02-23 1989-02-23 Druckmittelbetätigbarer Arbeitszylinder

Publications (3)

Publication Number Publication Date
EP0384032A1 EP0384032A1 (fr) 1990-08-29
EP0384032B1 true EP0384032B1 (fr) 1991-11-27
EP0384032B2 EP0384032B2 (fr) 1996-08-21

Family

ID=6374736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123620A Expired - Lifetime EP0384032B2 (fr) 1989-02-23 1989-12-21 Vérin à fluide sous pression

Country Status (8)

Country Link
US (1) US5035171A (fr)
EP (1) EP0384032B2 (fr)
JP (1) JPH02240405A (fr)
AT (1) ATE69861T1 (fr)
BR (1) BR9000924A (fr)
CA (1) CA2010624A1 (fr)
DE (2) DE3905561C2 (fr)
ES (1) ES2029111T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636270A1 (de) * 1996-09-06 1998-03-12 Star Gmbh Linearführungseinheit

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FR2670840B1 (fr) * 1990-12-20 1993-03-19 Diebolt Remy Actionneur d'articulation pour la mise en óoeuvre de tous mouvements rectilignes ou rotatifs.
DE4111887C2 (de) * 1991-04-09 1999-10-21 Mannesmann Ag Abdichtung eines druckmittelbetriebenen Arbeitszylinders
DE4139919C2 (de) * 1991-12-04 1994-01-20 Freudenberg Carl Fa Dichtung für einen hin- und hergehenden Körper
SE510396C2 (sv) * 1992-10-08 1999-05-17 Ckd Corp Kolvstångslös cylinder
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DE4345288C2 (de) * 1992-10-08 2000-03-09 Ckd Corp Stangenloser Zylinder
US5303638A (en) * 1993-02-26 1994-04-19 Green Joseph H Rodless piston and cylinder assembly for a reciprocating carriage
EP0735277A3 (fr) * 1995-03-28 1996-10-09 MANNESMANN Aktiengesellschaft Vérin hydraulique fonctionnant au moyen de fluides
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US5806439A (en) * 1997-04-23 1998-09-15 Concept Unlimited Inc. Transport system for automatic teller machines
US5836256A (en) * 1997-07-02 1998-11-17 Concept Unlimited Inc Apparatus for moving automatic teller machines between retracted and extended positions
SE511257C2 (sv) * 1998-01-29 1999-09-06 Vbg Prod Ab Manöveranordning
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DE102005029664B3 (de) * 2005-06-21 2006-08-31 Rud-Kettenfabrik Rieger & Dietz Gmbh U. Co. Gleitschutzvorrichtung
DE202007004693U1 (de) * 2007-03-30 2008-08-14 Robert Bosch Gmbh Lineareinheit
KR101706094B1 (ko) * 2010-01-14 2017-02-14 삼성전자주식회사 로봇용 관절 구동장치 및 이를 포함하는 로봇, 로봇용 관절 구동장치의 케이블 연결방법

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19636270A1 (de) * 1996-09-06 1998-03-12 Star Gmbh Linearführungseinheit

Also Published As

Publication number Publication date
EP0384032B2 (fr) 1996-08-21
DE3905561C2 (de) 1995-04-20
ES2029111T3 (es) 1992-07-16
DE3905561A1 (de) 1990-08-30
US5035171A (en) 1991-07-30
BR9000924A (pt) 1991-02-19
ATE69861T1 (de) 1991-12-15
CA2010624A1 (fr) 1990-08-23
DE58900502D1 (de) 1992-01-09
EP0384032A1 (fr) 1990-08-29
JPH02240405A (ja) 1990-09-25

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