EP0961037B1 - vérin hydraulique avec verrouillage en position déployée - Google Patents

vérin hydraulique avec verrouillage en position déployée Download PDF

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Publication number
EP0961037B1
EP0961037B1 EP99105840A EP99105840A EP0961037B1 EP 0961037 B1 EP0961037 B1 EP 0961037B1 EP 99105840 A EP99105840 A EP 99105840A EP 99105840 A EP99105840 A EP 99105840A EP 0961037 B1 EP0961037 B1 EP 0961037B1
Authority
EP
European Patent Office
Prior art keywords
locking
piston
cylinder
end position
arrangement
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
EP99105840A
Other languages
German (de)
English (en)
Other versions
EP0961037A1 (fr
Inventor
Josef Büter
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.)
Buemach Engineering International BV
Original Assignee
Buemach Engineering International BV
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 Buemach Engineering International BV filed Critical Buemach Engineering International BV
Publication of EP0961037A1 publication Critical patent/EP0961037A1/fr
Application granted granted Critical
Publication of EP0961037B1 publication Critical patent/EP0961037B1/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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Definitions

  • the invention refers to a hydraulic Working cylinder with an end position lock, in particular plunger and Differential work cylinder with an also guide side Locking in the higher pressure range.
  • the invention can be applied in all areas of fluid technology which in the end positions of the working cylinder a mechanical Lock is necessary.
  • IPC International Patent Classification
  • F15B Pressure-actuated actuators classified in the F15B.
  • the locking of fluid operated devices is specifically classified in the F15B 15/26.
  • Piston rod ratio PHI is hydraulic Working cylinders in the range of 1.6 to 2.5.
  • the commonly used balls therefore have opposite in surface contact pressing locking elements a principle disadvantage at high pressures due to the maximum permissible material load limits.
  • the working piston has transversely mounted locking members, the means of a working piston under the action of the pressure medium axially displaceable locking piston in the End positions of the working piston via expansion rings with annular grooves interact in the cylinder wall.
  • a pressure medium is supplied to the working piston and via channels in this, at the same time on the locking piston acts.
  • the locking piston is moved, so that the locking members by the bias of the Spreader rings are pushed back and the engagement of the Sp Schwarzringe is lifted with the grooves. Because the piston already charged with the pressure medium, the drives Verstellstrebe jerky off.
  • the object of the invention is to realize a on the guide side and / or bottom side usable Endlagenverriegelung a working cylinder that provides a smooth start guaranteed from the locked end positions.
  • basics Aspects provide separate modular detachable locking units and an optional usability of the piston rod for additional system solutions.
  • Another essential Aspect lies in the usability of this realization even for the higher one Pressure range, as well as in the exclusion of function-inhibiting Leakage problems.
  • the essence of the invention lies in the complete integration of the piston and the end position locking required Construction parts, - the locking elements, the prestressed Locking piston and the locking element support - within the annulus between piston rod and cylinders.
  • differential work cylinders is a such arrangement executed flipped on the piston.
  • the locking elements engage in the cylinder inner shell - Preferably in the field of caps - a.
  • the release of the locking elements takes place when pressure builds up in the working space by axial movement of the locking piston against the bias of the locking piston spring.
  • By releasing the interlocking effecting interlocking Forced locking of the locking piston takes place at infinitessimal axial movement of the piston - mediated via axially inclined contact surfaces of the locking element to the recess in the cylinder - the complete impressions the locking elements in the annular space between the piston rod and cylinders.
  • FIG. 1 and FIG. 2 there is a hydraulic working cylinder from a piston 1 on a piston rod 2, which is guided within a cylinder 3.
  • the stroke becomes the position of the piston 1 in the cylinder 3 positively locked by means of locking elements 4.
  • This Endlagenverriegelung needed in addition to the locking elements 4 a advantageously via a locking piston spring 5 - preloaded locking piston 6 and a Locking element support 7, which the locking elements 4 leads in their radial movement and locked axially.
  • the end position lock is together with the piston 1 completely within the annulus between piston rod. 2 and cylinder 3 integrated.
  • the locking elements 4 engage in locking the end position in recesses 8 of Cylinder inner shell, which preferably in a closure piece 9 are introduced.
  • the locking element carrier 7 is connected to the piston 1 and between this and the end position to be locked on the piston rod 2 arranged. He partially contributes to the axial guidance of the piston 1 in the cylinder 3 and includes in corresponding Clear one or more locking piston springs 5, which the compressive bias of the on the piston rod 2 axially movable locking piston 6 generates when the Locking piston 6 - by the pressure of the working fluid on its end-oriented surface - the piston 1 approaches.
  • the locking piston 6 has on its outer jacket a chamfer 10, which the locking elements.
  • the locking elements 4 positively between the recesses 8 and the locking element carrier 7 locked when the end position of the piston 1 is reached by the approach of the piston 1 built-up to the end position bias a radial Displacement to the outside of the locking elements 4 in the Recess 8 forces.
  • the contact surface forms the locking elements 4 with the recess 8 a slight axial slope 11 off.
  • the locking elements 4 are advantageously designed as circular segments, which in the recesses 8 a surface pressure is achieved.
  • Advantageous is the space of the locking piston spring 5 via a thin channel 12 with a valve 13 to each connected to other, pressure-free working space, as well with existing leakage always a relaxation of this space given is.
  • a differential working piston all necessary for end position locking construction elements as shown in FIG. 1, with these advantageous each mirrored at the interface of the piston 1.
  • the thus achievable modular design of Endlagenverriegelung allows one in the production of working cylinders simple functional equipment oriented to customer requirements this with largely uniform construction parts.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Vehicle Body Suspensions (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Chairs Characterized By Structure (AREA)
  • Fluid-Damping Devices (AREA)
  • Soil Working Implements (AREA)

Claims (6)

  1. Vérin hydraulique avec verrouillage en fin de course dans lequel :
    un piston (1) est guidé par une tige de piston (2) à l'intérieur d'un cylindre (3) équipé de pièces de fermeture, et en fm de course, la position du piston (1) dans le cylindre (3) est fixée par des éléments de verrouillage (4) intervenant par combinaison de formes,
    une intégration complète du piston (1), des éléments de verrouillage nécessaires à l'arrêt en fin de course et construits selon le principe modulaire, du piston de verrouillage précontraint (6) et du support des éléments de verrouillage (7) est réalisée à l'intérieur de l'espace annulaire compris entre la tige de piston (2) et le cylindre (3),
    le support des éléments de verrouillage (7) relié au piston (1) est placé sur la tige de piston (2) entre celui-ci et la position de fin de course à verrouiller, de sorte que les éléments de verrouillage (4) sont en interaction avec le piston (1) par l'intermédiaire du support des éléments de verrouillage (7),
    caractérisé en ce que
    dans la position de fin de course, pour libérer les éléments de verrouillage (4), au moins dans une première phase la pression d'un fluide agit d'abord dans une chambre de pression délimitée par la pièce de fermeture (9), la tige de piston (2) et le piston de verrouillage (6), de sorte que ce dernier se rapproche du piston (1).
  2. Vérin hydraulique avec verrouillage en fin de course, selon la revendication 1,
    caractérisé en ce que
    dans le cas de vérins à fonctionnement différentiel, un dispositif constitué des éléments de verrouillage (4), du piston de verrouillage (6) et du support des éléments de verrouillage (7) est réalisé de manière symétrique sur le piston (1) à l'intérieur de l'espace annulaire compris entre la tige de piston (2) et le cylindre (3).
  3. Vérin hydraulique avec verrouillage en fin de course, selon la revendication 1 ou 2,
    caractérisé en ce que
    aucune bille n'est utilisée comme élément de verrouillage (4).
  4. Vérin hydraulique avec verrouillage en fin de course, selon une des revendications 1 à 3,
    caractérisé en ce que
    l'espace du ressort (5) du piston de verrouillage assurant la précontrainte du piston de verrouillage est détendu par un canal (12) et par une soupape (13) qui réalisent un espace de travail opposé.
  5. Vérin hydraulique avec verrouillage en fin de course, selon une des revendications 1 à 4,
    caractérisé en ce que
    les pièces assurant alternativement le guidage axial du support des éléments de verrouillage (7) en mouvement alternatif sont interchangeables avec les pièces du ressort (5) du piston de verrouillage.
  6. Vérin hydraulique avec verrouillage en fin de course, selon une des revendications 1 à 5,
    caractérisé en ce que
    du fait de la conception modulaire des pièces constitutives nécessaires au verrouillage, par rapport au piston (1), il est possible de réaliser le vérin de façon simple, au choix avec ou sans verrouillage.
EP99105840A 1998-05-29 1999-03-23 vérin hydraulique avec verrouillage en position déployée Expired - Lifetime EP0961037B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29809717U 1998-05-29
DE29809717U DE29809717U1 (de) 1998-05-29 1998-05-29 Endlagenverriegelung hydraulischer Arbeitszylinder

Publications (2)

Publication Number Publication Date
EP0961037A1 EP0961037A1 (fr) 1999-12-01
EP0961037B1 true EP0961037B1 (fr) 2005-05-11

Family

ID=8057879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99105840A Expired - Lifetime EP0961037B1 (fr) 1998-05-29 1999-03-23 vérin hydraulique avec verrouillage en position déployée

Country Status (3)

Country Link
EP (1) EP0961037B1 (fr)
AT (1) ATE295483T1 (fr)
DE (2) DE29809717U1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29920657U1 (de) 1999-11-24 2000-02-24 Bümach Engineering International B.V., Emmen Endlagengeber für pneumatisch oder hydraulisch wirkende Arbeitszylinder mit Endlagenverriegelung
DE102010024268A1 (de) * 2010-06-18 2011-12-22 Liebherr-Aerospace Lindenberg Gmbh Zylindereinheit mit Verriegelungseinheit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE719409C (de) * 1937-11-27 1942-04-07 Messerschmitt Boelkow Blohm Verstellstrebe fuer Flugzeuge
FR896839A (fr) * 1942-09-07 1945-03-05 Ver Deutsche Metallwerke Ag Dispositif pour verrouiller les cylindres de travail à bord des avions
CH353428A (de) * 1957-06-04 1961-04-15 Sprecher & Schuh Ag Druckmittelbetätigter Antrieb für elektrische Schaltgeräte
DE2616973C3 (de) * 1976-04-17 1981-02-19 Wabco Fahrzeugbremsen Gmbh, 3000 Hannover Pneumatischer Arbeitszylinder zur Betätigung und stufenlosen Arretierung von Stellgliedern
CA1114753A (fr) 1978-11-27 1981-12-22 James D. Helm Dispositif de verrouillage
DE3730808A1 (de) 1987-09-14 1989-03-23 Heb Hydraulik Elementebau Gmbh Verriegelungsvorrichtung fuer hydraulische oder pneumatische arbeitszylinder
CH673320A5 (fr) * 1987-09-17 1990-02-28 Gerhard Hillen
JPH02292504A (ja) 1989-05-01 1990-12-04 Teijin Seiki Co Ltd ロック機構付液圧アクチュエータ
DE4107980A1 (de) 1991-03-13 1992-09-17 Bosch Gmbh Robert Hydraulisch betaetigte rasteinrichtung

Also Published As

Publication number Publication date
EP0961037A1 (fr) 1999-12-01
ATE295483T1 (de) 2005-05-15
DE59912030D1 (de) 2005-06-16
DE29809717U1 (de) 1998-08-20

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