EP0388586B1 - Vérin à fluide sous pression - Google Patents

Vérin à fluide sous pression Download PDF

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Publication number
EP0388586B1
EP0388586B1 EP90101128A EP90101128A EP0388586B1 EP 0388586 B1 EP0388586 B1 EP 0388586B1 EP 90101128 A EP90101128 A EP 90101128A EP 90101128 A EP90101128 A EP 90101128A EP 0388586 B1 EP0388586 B1 EP 0388586B1
Authority
EP
European Patent Office
Prior art keywords
support
housing
cylinder
actuated
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.)
Expired - Lifetime
Application number
EP90101128A
Other languages
German (de)
English (en)
Other versions
EP0388586A1 (fr
EP0388586B2 (fr
Inventor
Norbert Fortmann
Rudolf Möller
Helmut Göttling
Gerhard Scharnowski
Hans F. Meyer
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=6376907&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0388586(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
Publication of EP0388586A1 publication Critical patent/EP0388586A1/fr
Publication of EP0388586B1 publication Critical patent/EP0388586B1/fr
Application granted granted Critical
Publication of EP0388586B2 publication Critical patent/EP0388586B2/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
    • Y10T74/18992—Reciprocating to reciprocating

Definitions

  • the invention relates to a pressure-actuated working cylinder with a driver driven by a piston via a flexible tension element according to the preamble of claim 1.
  • Such a working cylinder is known from DE-A-2 830 058.
  • This known working cylinder has guide plates attached to the cylinder housing, each for a deflection device having a deflection element for the tension element.
  • the deflecting elements are designed as deflecting rollers, the deflecting rollers being arranged in the region of the ends of the cylinder housing.
  • Each deflecting roller is arranged on an axis which runs transversely to the longitudinal axis of the cylinder and serves as a support for the deflecting roller and is slidably mounted in a slot-shaped recess of this guide plate which runs parallel to the longitudinal axis of the guide plate and is slidable in the longitudinal direction of the slot-shaped recess.
  • Spring-loaded means are provided, which are supported on the guide plate and load the axis in the direction away from the cylinder, so that the tension element is always kept under tension.
  • the invention has for its object to provide a pressure-actuated working cylinder of the type mentioned, which is compact in its construction and in which a safe guidance of the deflection device and thus the tension element is guaranteed.
  • the invention offers in particular the advantage of being able to form the working cylinder in a space-saving manner by the arrangement of supports for the deflecting elements which are slidably guided in a further housing bore additionally provided in the cylinder housing.
  • each carrier is at least partially designed as a tubular body, into which a spring that acts on the carrier from the cylinder housing extends. This measure considerably reduces the space required for a spring with a large axial extension.
  • an anti-rotation device for the carrier and thus also for the deflection roller is achieved without an additional anti-rotation device having to be provided for this purpose.
  • This anti-rotation device ensures that the tension element is guided securely by means of the deflection element.
  • an anti-rotation device can be achieved by providing a groove running in the longitudinal direction of the housing bore in the wall defining the housing bore, into which a projection provided on the carrier engages.
  • a common housing bore can be provided for both supports, which is divided into two coaxial housing bore parts by an insert.
  • a pressure-actuated working cylinder is shown with a driver driven by a piston via a bendable tension element.
  • the working cylinder has a profiled tube serving as a cylinder housing 1 with a first housing bore 34 running in the direction of the longitudinal axis of the cylinder housing 1.
  • the first housing bore 34 can have a circular cross section, but also a deviating from the circular shape, e.g. have an oval cross-section.
  • a piston 31 is arranged such that it can be displaced in a sealed manner by means of sealing rings 30 and 32.
  • the cross-sectional shape of the piston 31 naturally corresponds to the cross-sectional shape of the first housing bore 34.
  • the first housing bore 34 is closed at both ends by a first cover 2 and a second cover 27.
  • the piston 31 divides the cylinder space into a first working chamber 33 and a second working chamber 29.
  • the first working chamber 33 is connected to a valve device (not shown) via a pressure medium connection 35 and the second working chamber 29 is connected via a second pressure medium connection 28 which the two working chambers 33 and 29 can be connected either to a pressure medium source or to the atmosphere or to a return.
  • first cover 2 there is a passage having a sealing element 3 and in the second cover 27 there is another passage having a sealing element 26, through which a pulling element 25 connected to the piston 31 is sealed and led out of the end faces of the cylinder.
  • a first guide 12 is provided in or on the cylinder housing 1 for a driver 14 guided in the longitudinal direction of the cylinder housing 1.
  • the cylinder housing 1 has a further guide, which is formed in each case by a further housing bore 13 or 16 of the cylinder housing 1, which runs in the direction of the longitudinal axis of the cylinder housing 1.
  • the two further housing bores 13, 16 have a rectangular cross section.
  • the two further housing bores 13 and 16 are formed by a bore which penetrates the cylinder housing 1 in the longitudinal direction and is divided into the two housing bores 13 and 16 by an insert (15) arranged in this bore.
  • One housing bore 13 is referred to below as the first bore section 13 and the other housing bore 16 is referred to below as the second bore section 16.
  • the further guide is arranged in the area between the first housing bore 34 and the first guide 12 provided in or on the cylinder housing 1 for the driver 14, which is also connected to the tension element 25.
  • the longitudinal axis of the first housing bore 34, the longitudinal axis of the further guide 13, 16 and the longitudinal axis of the first guide 12 for the driver 14 run parallel to one another and parallel to the longitudinal axis of the cylinder housing 1.
  • first carrier 11, for a first roller 8 serving as a deflecting element for the tension element 25, which can be displaced in the direction of the longitudinal axis of the second housing bore 13, 16.
  • a second support 17, 21 for a second roller 22 serving as a deflecting element for the tension element 25 is arranged in the second bore section 16 of the further guide so as to be displaceable in the direction of the longitudinal axis of the second housing bore 13, 16.
  • the first carrier 11, 7 and the second carrier 17, 21 also have a rectangular cross section.
  • Each support 11, 7 or 17, 21 with associated deflection element (roller 8 and roller 22) forms a deflection device 11, 7, 8 or 17, 21, 22, respectively.
  • the two supports 11, 7 and 17.21 are designed as tubular bodies 11 and 17 and each have a fork-shaped part 7 and 21 at their end region protruding from the associated bore section 13 and 16, respectively.
  • the fork-shaped part 7 of the first carrier 11, 7 has an axis 9 running transversely to the longitudinal axis of the first carrier 11, 7, on which the first roller 8 is rotatably mounted.
  • the fork-shaped part 21 of the second carrier 17, 21 also has an axis 23 which runs transversely to the longitudinal axis of the second carrier 17, 21 and on which the second roller 22 is rotatably mounted.
  • a first spring 4 is arranged in the tubular body 11 of the first carrier 11, 7, the axial extension of which is greater than the axial extension of the tubular body 11 of the first carrier 11, 7.
  • the first spring 4 is supported at one end by the insert 15 in the further housing bore 13, 16 and acts with its other end on a wall 6 delimiting the tubular body, to which the fork-shaped part 7 of the first carrier 11, 7 connects.
  • a second spring 18 is arranged in the tubular body 17 of the second carrier 17, 21, the axial extension of which is greater than the axial extension of the tubular body 17 of the second carrier 17, 21.
  • the one end of the second spring 18 is supported on the insert 15 in the further housing bore 13, 16 and acts with its other end on a wall 20 delimiting the tubular body, to which the fork-shaped part 21 of the second carrier 17, 21 connects.
  • the first carrier 11, 7 carrying the first roller 8 is loaded in the direction of the longitudinal axis of the cylinder housing 1 in the direction away from the cylinder housing 1.
  • the second carrier 17, 21 carrying the second roller 22 is loaded in the direction of the longitudinal axis of the cylinder housing 1 in the direction away from the cylinder housing 1.
  • the tension element 25 which connects the piston 31 to the driver 14 and is guided over the two rollers 8 and 22, is kept constantly under tension.
  • the first carrier 11, 7 has a stop 5 on its outer lateral surface, which can be brought into contact with the associated end face of the cylinder housing 1 when the first carrier 11, 7 moves in the direction of the cylinder housing 1 and so limits the stroke of the first carrier 11, 7 in the direction of the cylinder housing 1.
  • the second carrier outside of the further housing bore 13, 16 has a stop 19 on its outer lateral surface, which stops when the second carrier 17, 21 moves in the direction of the cylinder the housing 1 can be brought into contact with the associated end face of the cylinder housing 1 and thus limits the stroke of the second carrier 17, 21 in the direction of the cylinder housing 1.
  • a first cap-like cover 10 and a second cap-like cover 24 are attached to the two ends of the cylinder housing 1, which enclose the carriers provided with the rollers 8 and 22 together with the cylinder housing 1 and thus protect these components from contamination.
  • the tension element 25 which partially wraps around the rollers 8 and 22 and the stops 5 and 19 on the carriers 11, 7 and 17, 21 limit the stroke of the carriers 11, 7 and 17, 21 carrying the rollers 8 and 22 in the direction away from the cylinder housing 1 or towards the cylinder housing 1.
  • FIG. 2 shows the cylinder housing 1 with the first housing bore 34 with piston 31, the first bore section 13 with the tubular body 11 of the first carrier 11, and the driver 14 in section along the line A-A according to FIG. It can be clearly seen from this figure that the first housing bore 34, the further housing bores 13, 16 serving as further guidance and the driver 14 are arranged one above the other on a common vertical axis.
  • the further housing bores 13, 16 can be designed as a single through-bore which has an insert 15 serving as a support for both springs 4 and 18 or also two inserts, each insert then being assigned to a spring 4 or 18.
  • two individual bores designed in the manner of a blind bore can also be provided for the supports.
  • an insert can be dispensed with, since the bottom of each blind bore would serve as spring support for the associated spring 4 or 18.
  • the bore or the bores can have a circular cross section, but also any cross section deviating from the circular shape.
  • the further housing bore 13, 16 or the further housing bores for the supports 11, 7 and 17, 21 can also be arranged in the cylinder housing 1 in a slightly oblique manner with respect to the longitudinal axis of the cylinder housing 1.
  • each carrier that carries the roller can be configured cranked.
  • Each support carrying a role can at least partially consist of a tubular body which can serve to receive the associated tension spring for supports with a role.
  • the carrier can also consist of solid material, so that the spring acts on the end face of the carrier facing the further housing bore.
  • each carrier is designed so that it is securely guided in the associated further housing bore.
  • the carrier is designed such that it is adapted to the cross-sectional shape of the further housing bore.
  • Additional stops 5 and 19 to be arranged on the supports 11, 7 and 17, 21 can be dispensed with if the length of the supports 11, 7 or 17, 21 is dimensioned such that the supports 11, 7 or 17, 21 with their end faces located in the further housing bores 13, 16 on the insert 15 or on the inserts or on the bottom of the blind bores come into contact when the carrier (s) 11, 7 or 17, 21 has a predeterminable stroke in the direction of the Have cylinder housing 1 to run.
  • Each spring 4 or 18 itself can also serve as a stop if it is in a fully compressed state (turn to turn) or if the spring is designed to be very strong.
  • the supports 11, 7 and 17, 21 with the rollers 8, 22 are then guided by the tension element 25 against the force of the springs 4 and 18 in the further guidance (Housing bores 13, 16) held that they abut with their stops 5 and 19 on the associated end faces of the cylinder housing 1.
  • the tension element 25 is loaded with tension on its side which partially wraps around the second roller 22, since via the pulling element 25, the driver 14 is moved (pulled) from the piston 31 to the right, in the direction of the second cover 24.
  • the part of the tension element 25 which partially wraps around the first roller 8 (part between the driver 14, the first roller 8 and the piston 31) is relieved in this process, a slight play between the first roller 8 and the tension element 25 being produced.
  • the first carrier 11, 7 Due to the force occurring on the tension element 25, the first carrier 11, 7 is pushed into the further housing bore 13, 16 against the force of the spring 4, namely until the stop 5 of the first carrier 11, 7 on the associated end face of the cylinder housing 1 comes to the plant.
  • the force of the second spring 18 acting on the second carrier 17, 21 displaces the second carrier 17, 21 away from the associated end face of the cylinder housing 1, the stop 19 being released from this end face of the cylinder housing 1.
  • the tension element 25 is held tensioned in the area between the driver 14, the second roller 22 and the piston 31.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Claims (13)

1. Vérin hydraulique actionné par un agent sous pression avec un entraîneur (14) entraîné par un piston (31) par l'intermédiaire d'un élément de traction (25) flexible, avec les éléments suivants :
a) le piston (31) est guidé dans un premier perçage de carter (34) prévu dans un carter de cylindre (1), s'étendant dans le sens longitudinal du carter de cylindre (1),
b) l'entraîneur (14) est guidé dans un premier guidage (12) dans le sens longitudinal du carter de cylindre (1),
c) aux extrémités du carter de cylindre (1) sont disposés des dispositifs de renvoi pour l'élément de traction (25) composés d'un élément de renvoi (8 ou 22) et d'un support (11, 7 ou 17, 21),
d) les dispositifs de renvoi sont respectivement guidés de façon à pouvoir coulisser dans un autre guidage (13,16) et sont actionnés par des forces de ressort de telle façon que l'élément de traction (25) est maintenu constamment tendu,
vérin hydraulique caractérisé en ce que l'autre guidage est formé par un autre perçage de carter (13 ou 16) du carter de cylindre (1), qui sert à recevoir au moins une partie du support (11, 7 ou 17, 21) des dispositifs de renvoi respectifs.
2. Vérin hydraulique pouvant être actionné par un agent sous pression selon la revendication 1, caractérisé en ce que l'actionnement des dispositifs de renvoi par les forces de ressort se produit sensiblement dans le sens de l'axe longitudinal du carter de cylindre.
3. Vérin hydraulique pouvant être actionné par un agent sous pression selon au moins l'une des revendications précédentes, caractérisé en ce que les forces de ressort sont exercées respectivement par un ressort (4 ou 18) qui est disposé dans l'autre perçage de carter (13 ou 16) et s'appuie d'une part sur le carter de cylindre (1) et d'autre part sur le support (11, 7 ou 17, 21).
4. Vérin hydraulique pouvant être actionné par un agent sous pression selon au moins l'une des revendications précédentes, caractérisé en ce que les forces de ressort pour les deux dispositifs de renvoi sont exercées par un ressort commun, qui est disposé dans un perçage de carter commun (13, 16) formant deux autres perçages de carter (13 ou 16) et s'appuient sur les deux supports (11, 77 ou 17, 21) des dispositifs de renvoi.
5. Vérin hydraulique pouvant être actionné par un agent sous pression selon la revendication 3, caractérisé par les éléments caractéristiques suivants:
a) chaque support (11, 7 ou 17, 21) est formé au moins partiellement comme un corps tubulaire (11 ou 17),
b) chaque ressort (4 ou 18) s'étend dans le corps tubulaire correspondant (11 ou 17),
c) chaque ressort (4 ou 18) est dimensionné dans le sens de son étendue axiale de telle façon qu'il fait saillie hors du corps tubulaire correspondant (11 ou 17), le ressort s'appuyant par l'une de ses extrémités sur un insert (15) disposé dans l'autre perçage de carter (13, 16) et actionnant le corps tubulaire correspondant (11 ou 17) dans le sens s'écartant du carter de cylindre (1).
6. Vérin hydraulique pouvant être actionné par un agent sous pression, selon la revendication 4, caractérisé par les éléments caractéristiques suivants:
a) chaque support (11, 7 ou 17, 21) est formé au moins partiellement comme un corps tubulaire (11 ou 17),
b) le ressort commun pour l'actionnement des deux dispositifs de renvoi est disposé dans l'autre perçage de carter (13, 16) et s'étend par ses côtés tournés à l'opposé l'un de l'autre dans le corps de forme tubulaire (11 ou 17) des dispositifs de renvoi,
c) le ressort est dimensionné dans son étendue axiale de telle façon qu'il actionne les deux supports (11, 7) ou (17, 21) dans le sens s'écartant des extrémités du carter de cylindre (1) tournées à l'opposé l'une de l'autre.
7. Vérin hydraulique pouvant être actionné par un agent sous pression selon au moins l'une des revendications précédentes, caractérisé en ce que les autres perçages de carter (13 ou 16) et chaque support (11, 7 ou 17, 21) présentent une section transversale, qui s'écarte de la forme circulaire.
8. Vérin hydraulique pouvant être actionné par un agent sous pression, selon au moins l'une des revendications précédentes, caractérisé en ce que les autres perçages de carter (13 ou 16) et chaque support (11, 7 ou 17, 21) présentent une section transversale rectangulaire.
9. Vérin hydraulique pouvant être actionné par un agent sous pression, selon au moins l'une des revendications précédentes, caractérisé en ce que pour chaque support (11, 7 ou 17, 21), il est prévu une butée (5 ou 19), au moyen de laquelle est limitée une course de support (11, 7 ou 17, 21) dans le sens allant vers le carter de cylindre (1).
10. Vérin hydraulique pouvant être actionné par un agent sous pression, selon la revendication 9, caractérisé en ce que la butée (5 ou 19) de chacun des supports (11, 7 ou 17,21) est disposée en dehors des autres perçages de carter (13 ou 16) sur l'enveloppe du support correspondant (11, 7 ou 17, 21).
11. Vérin hydraulique pouvant être actionné par un agent sous pression, selon au moins l'une des revendications précédentes, caractérisé en ce que l'élément de renvoi consiste en une poulie (8 ou 22) montée sur le support (11, 7 ou 17, 21) de façon à pouvoir tourner.
12. Vérin hydraulique pouvant être actionné par un agent sous pression, selon au moins l'une des revendications précédentes, caractérisé en ce que sur l'enveloppe extérieure de chacun des supports (11, 7 ou 17, 21), il est prévu une saillie s'étendant vers l'extérieur, qui pénètre dans un évidement disposé dans l'enveloppe délimitant les autres alésages de carter (13 ou 16), évidement qui s'étend dans le sens longitudinal des autres perçages de carter (13 ou 16).
13. Vérin hydraulique pouvant être actionné par un agent sous pression, selon au moins l'une des revendications 1 à 4 et 7 à 12, caractérisé par les éléments caractéristiques suivants :
a) chaque support (11, 7 ou 17, 21) consiste en une matière pleine,
b) le côté tourné à l'opposé de l'élément de renvoi correspondant (8 ou 22) de chacun des supports (11, 7 ou 17, 21) est actionné dans le sens de l'axe longitudinal du support (11, 7 ou 17, 21) par le ressort (4 ou 18) associé à ce support (11, 7 ou 17, 21).
EP90101128A 1989-03-22 1990-01-20 Vérin à fluide sous pression Expired - Lifetime EP0388586B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909344A DE3909344A1 (de) 1989-03-22 1989-03-22 Druckmittelbetaetigbarer arbeitszylinder
DE3909344 1989-03-22

Publications (3)

Publication Number Publication Date
EP0388586A1 EP0388586A1 (fr) 1990-09-26
EP0388586B1 true EP0388586B1 (fr) 1992-04-01
EP0388586B2 EP0388586B2 (fr) 1996-10-09

Family

ID=6376907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90101128A Expired - Lifetime EP0388586B2 (fr) 1989-03-22 1990-01-20 Vérin à fluide sous pression

Country Status (4)

Country Link
US (1) US5022311A (fr)
EP (1) EP0388586B2 (fr)
JP (1) JPH02275102A (fr)
DE (2) DE3909344A1 (fr)

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DE4111887C2 (de) * 1991-04-09 1999-10-21 Mannesmann Ag Abdichtung eines druckmittelbetriebenen Arbeitszylinders
DE4300875A1 (de) * 1993-01-15 1994-07-21 Becker Autoradio Verfahren zur Abstimmung eines mobilen Rundfunkempfängers
US5868499A (en) * 1996-09-06 1999-02-09 Deutsche Star Gmbh Linear guiding unit
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DE102009053568A1 (de) * 2009-11-10 2011-06-16 Gas - Automation Gmbh Führungsprofil und Linearmotorantriebseinrichtung
EP3124188B1 (fr) * 2015-07-30 2017-11-29 Magna Steyr Fuel Systems GesmbH Dispositif de coupe

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Also Published As

Publication number Publication date
DE59000074D1 (de) 1992-05-07
JPH02275102A (ja) 1990-11-09
US5022311A (en) 1991-06-11
EP0388586A1 (fr) 1990-09-26
DE3909344A1 (de) 1990-09-27
EP0388586B2 (fr) 1996-10-09

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