EP0246736B1 - Dispositif pneumatique comportant piston et cylindre à double effet - Google Patents

Dispositif pneumatique comportant piston et cylindre à double effet Download PDF

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Publication number
EP0246736B1
EP0246736B1 EP87302404A EP87302404A EP0246736B1 EP 0246736 B1 EP0246736 B1 EP 0246736B1 EP 87302404 A EP87302404 A EP 87302404A EP 87302404 A EP87302404 A EP 87302404A EP 0246736 B1 EP0246736 B1 EP 0246736B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure fluid
lifting
actuated
unlocking
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
EP87302404A
Other languages
German (de)
English (en)
Other versions
EP0246736A1 (fr
Inventor
Peter Ridderman
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.)
Colt International Holdings AG
Original Assignee
Colt International Holdings AG
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 Colt International Holdings AG filed Critical Colt International Holdings AG
Priority to AT87302404T priority Critical patent/ATE60938T1/de
Publication of EP0246736A1 publication Critical patent/EP0246736A1/fr
Application granted granted Critical
Publication of EP0246736B1 publication Critical patent/EP0246736B1/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 relates to a lifting cylinder which can be actuated by pressure fluid for opening and closing ventilating devices in particular, such as ventilation flaps and the like, having a double-­sided working piston which is disposed on the surface of a longitudinally movable lifting rod and the working pressure chambers of which can each be acted upon by the pressure fluid through a pressure-fluid connection for the stroke movement of the lifting rod, and having detent recesses at the lifting-rod side as well as locking members associated with each working pressure chamber and provided perpendicular to the longitudinal axis of the lifting rod to lock the lifting rod, each of which locking members is disposed for longitudinal movement and in a spring-loaded manner in an unlocking pressure chamber and can be acted upon by the pressure fluid through the pressure-fluid connection of the particular associated working pressure chamber in order to unlock the lifting rod.
  • a lifting cylinder which can be actuated by pressure fluid for opening and closing ventilating devices in particular, such as ventilation flaps and the like, having a double-­sided working piston which is disposed on the
  • a lifting cylinder of this type known from the DE-AS 20 36 716
  • the supply of compressed air to the working pressure chambers is effected through pressure conduits extending along the lifting rod at the cylinder housing side.
  • the particular compressed air supplies to the unlocking pressure chambers are connected to these pressure conduits.
  • the locking member is acted upon by compressed air through the particular compressed-­air connection, the pressure conduit of the working pressure chamber and its compressed-air supply to the unlocking pressure chamber leading into the pressure conduit.
  • the compressed air supplied through the pressure conduit also reaches the working pressure chamber of the working piston at the same time.
  • DE-A-3,018,920 discloses a lifting cylinder having a locking member consisting of locking balls and a sliding locking element at the cylinder housing side and a shut-off valve which when closed prevents the flow of pressure fluid from a first pressure fluid connection to the working pressure chamber of the cylinder.
  • the sliding locking element is displaceable in one direction first to an unlocking position by the supply of pressure fluid to an unlocking chamber through a second pressure fluid connection to provide for unlocking and then to a fully retracted position, with a time delay, a shut-off valve rod of the shut-off valve following the sliding locking element to open the shut-off valve when the locking element reaches its fully retracted position.
  • the lifting cylinder according to the invention is characterised in that the supply of pressure fluid to a working pressure chamber of the working piston can be closed when its locking member is in the locking position and freed when this locking member reaches the unlocking position, the supply of pressure fluid to the working pressure chamber being effected in each case through a flow connection opening into the unlocking pressure chamber of the associated locking member, which flow connection is controlled by a closing member in operational communication with the locking member.
  • the pressure fluid is at first supplied only to the surface of the locking member adapted for the application of pressure, in order to unlock the lifting rod.
  • the supply of pressure fluid to the working pressure chamber of the double-sided working piston responsible for the necessary opening or closing movement is released from the unlocking pressure chamber.
  • the lifting cylinder as a whole is simple and cheap to manufacture and can be equipped not only with a preferably pneumatic unlocking means but also with an additional possibility for manual unlocking. Construction and operation of the lifting cylinder according to the invention will now be explained in more detail with reference to the drawing.
  • the drawing In the drawing:
  • the lifting cylinder which can be actuated by pressure fluid and which is intended to serve for the opening and closing of ventilation flaps in installations for the escape of smoke from buildings, halls and the like is designated in general by the numeral 1.
  • the lifting cylinder 1 consists of a lifting rod 2 which is guided for longitudinal movement in a lifting-cylinder housing 3, 3 ⁇ , 3 ⁇ . Screwed into the free end face 4 of the lifting rod 2 is an articulated eye member 5 for the connection of adjusting members, not illustrated, for opening and closing the ventilation flaps.
  • the lifting rod 2 is constructed with two longitudinal regions having different cross-sectional widths.
  • a double-sided working piston 7 is disposed on the surface of the longitudinally movable lifting rod 2 in the longitudinal region of reduced cross-sectional width 6.
  • the working pressure chambers 8 and 9 of the working piston 7 are constructed inside the housing 3 between the working piston 7 and the end portions 3 ⁇ and 3 ⁇ of the housing.
  • two locking members 11 and 12 are provided perpendicular to the longitudinal axis 10 of the lifting rod to lock the lifting rod in the opening or closing position. These locking members 11 and 12 co-operate with detent recesses 13 and 14 provided on the lifting rod 2.
  • the locking members 11 and 12 are disposed in an unlocking pressure chamber 15 or 16 inside the housing 3 and are each loaded by a compression spring 17 or 18.
  • the compression springs 17 and 18 surround an actuating piston 19 screwed into the locking members 11 and 12 and taken to the outside through the peripheral surface of the housing for the manual activation of the locking members 11 and 12 or to enable the lifting rod 2 to be unlocked manually.
  • the locking members 11 and 12 are each provided with a receiving bore 20 at the top.
  • the locking member 11, on the left in Figure 1, with its associated detent recess 13 serves to lock the lifting rod in the retracted position and the locking member 1, on the right in Figure 1, with its associated detent recess 14 serves to lock the lifting rod in the extended position of the lifting rod 2.
  • the retracted end position of the lifting rod 2 is illustrated, in which the locking member 11 engages with its locking extension 21 in the detent recess 13 and locks the lifting rod.
  • the locking member 12 with its locking extension 22 lies, acted upon by compressed air, against the inner wall of the housing shell, being loaded by spring force so that during the outward movement of the lifting rod 2, when the end position is reached, the locking member 12 engages in the detent recess 14 as a result of the force of the compression spring 18.
  • a pressure-fluid connection 23 is provided on the end housing portion 3 ⁇ for the admission of pressure fluid to the working pressure chamber 8 and to the unlocking pressure chamber 15 and a pressure-fluid connection 24 is provided for admission to the working pressure chamber 9 and to the unlocking pressure chamber 16.
  • the supply of compressed air to the unlocking pressure chamber 15 is effected from the pressure connection 23 via a pressure conduit 25, the longitudinal guide space 26 of the lifting rod 2 and the transverse bore 27.
  • the supply of pressure fluid to the working pressure chamber 8 is effected via the unlocking pressure chamber 15 through a flow connection 28 which opens into an upper region of the unlocking pressure chamber 15 which is sealed, in any position other than the unlocking position of the locking member 11, by a seal 30 secured to the marginal shoulder 29 of the locking member 11, which can be acted upon by pressure.
  • the locking member 11 with its marginal shoulder 29 carrying the seal 30 forms the closing member controlling the flow connection 28 of the working pressure chamber 8.
  • the supply of pressure fluid to the unlocking pressure chamber 16 is effected from the pressure-fluid connection 24, through a connecting conduit, not shown, to the supply conduit 31 and through the pressure conduits 32.
  • the locking member 12 associated with the working pressure chamber 9 is also provided at the top with a marginal shoulder 33 which can be acted upon by pressure and which carries a seal 34 guided on the side walls of the unlocking pressure chamber 16. This seal 34 likewise only frees the flow connection 35 to the working pressure chamber 9 during or after unlocking of the lifting rod 2 by the locking member 12.
  • the locking member 11 moves along its longitudinal axis against the force of the compression spring 17 into the upper unlocking position in which the flow connection 28 is first freed.
  • the region of the unlocking pressure chamber 15 formed at the top of the locking member 11 is vented through the passage for the actuating piston 19 at the housing side during the longitudinal movement of the locking member 11. Since no forces are produced at the working piston 7 until the lifting rod 2 is completely unlocked, the unlocking operation can be completed without hindrance and with little noise with only little pressure.
  • the sealing sleeve 38 sealing the working pressure chambers 8 and 9 is guided on the inner walls of the housing in a manner which protects the material.
  • the detent recesses 13 and 14 of the lifting rod 2 are each formed in annular locking members 39 which are pushed, in an interchangeable manner, onto the lifting-rod region 6 having a reduced cross-sectional width.
  • These annular locking members 39 are disposed one at each side of an annular disc 40 forming the double-sided working piston and likewise slid onto the lifting rod 2.
  • Annular disc 40 and annular locking members 39 are braced to the shoulder 43 of the lifting rod 2 through a screw 42 which can be screwed into the end face 41 of the lifting rod 2 so that annular locking members 39, annular disc 40, seals 36, etc. can be exchanged rapidly if necessary.
  • the locking extensions 21 and 22 of the locking members 11 and 12 engage positively in the detent recesses 13 and 14 so that, because of reduced pressure, the locking components are subjected to only slight wear in comparison with the known pin locking means.
  • the locking members 11 and 12 are also guided for movement in guide bushes 44 which may appropriately consist of a hardened material.
  • One side wall of each of the detent recesses 13 and 14 is formed by a side-wall ring 46 which can be inserted in an annular groove 45 formed on the locking member 39 at the end and which likewise consists of a hardened material and can, if necessary, be exchanged in a simple manner without renewing the annular locking member 39.
  • Annular grooves 47 which form an end holding means for the exchangeable securing of the sliding seals 36, are likewise formed on the opposite end face of the annular locking member 39 to the annular groove 45 in each case.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Claims (10)

1. Vérin élévateur qui peut être actionné par un fluide sous pression, de préférence pour ouvrir et fermer des dispositifs de ventilation, tel que des volets de ventilation et des éléments similaires, comportant un piston de travail à double effet (7) qui est disposé sur la surface périphérique d'une tige d'élévation (2) mobile longitudinalement, un fluide sous pression pouvant être admis, à travers un raccord de fluide sous pression (23, 24), dans chacune des chambres de travail soumises à la pression (8, 9), pour provoquer la course de la tige d'élévation (2), des creux de blocage (13, 14) prévus dans la surface latérale de la tige d'élévation et des organes de verrouillage (11, 12), chacun de ces organes étant associé à l'une des chambres de travail (8, 9) pouvant être mises en pression, étant disposé perpendiculairement à l'axe longitudinal (10) de la tige d'élévation et étant adapté de manière à pouvoir se déplacer longitudinalement, chaque organe de verrouillage étant également soumis à une force d'un ressort de rappel dans une chambre de déverrouillage (15, 16) pouvant être mise en pression et pouvant être actionné par le fluide sous pression, par l'intermédiaire du raccord de fluide sous pression (23, 24) de la chambre de travail (8, 9) qui lui est associée, afin d'assurer le déverrouillage de la tige d'élévation, caractérisé en ce que l'alimentation d'une chambre de travail (8, 9) du piston de travail (7) en fluide sous pression peut être interrompue lorsque son organe de verrouillage (11, 12) se trouve dans la position de verrouillage et par contre autorisée lorsque cet organe de verrouillage (11, 12) atteint la position de déverrouillage, l'alimentation de la chambre de travail (8, 9) en fluide sous pression étant réalisée, dans chaque cas, à travers un passage (28, 35) débouchant dans la chambre de déverrouillage (15, 16) de l'organe de verrouillage associé (11, 12), ce passage étant commandé par un organe de fermeture en communication opérationnelle avec l'organe de verrouillage (11, 12).
2. Vérin élévateur qui peut être actionné par un fluide sous pression suivant la revendication 1 caractérisé en ce que l'organe de fermeture qui est mobile avec l'organe de verrouillage (11, 12) sans toutefois pouvoir se déplacer par rapport à celui-ci, est guidé, avec une action d'étanchéité, sur les parois internes de la chambre de déverrouillage (15, 16) et le passage (28, 35) débouche dans une région de la chambre de déverrouillage (15, 16) qui est rendue étanche par l'organe de fermeture dans n'importe quelle position autre que la position de déverrouillage de l'organe de verrouillage (11, 12).
3. Vérin élévateur qui peut être actionné par un fluide sous pression suivant la revendication 2 caractérisé en ce que l'organe de verrouillage (11, 12) est pourvu d'un épaulement marginal (29, 33) sur lequel peut agir la pression, qui porte un joint d'étanchéité (30, 34) et qui forme l'organe de fermeture.
4. Vérin élévateur qui peut être actionné par un fluide sous pression suivant l'une quelconque des revendications précédentes caractérisé en ce que les organes de verrouillage (11, 12) comportent des prolongements de verrouillage (21, 22) qui s'engagent sensiblement d'une manière positive dans les creux de blocage (13, 14) de la tige d'élévation (2).
5. Vérin élévateur qui peut être actionné par un fluide sous pression suivant l'une quelconque des revendications précédentes caractérisé en ce que les organes de verrouillage (11, 12) sont guidés, dans leurs mouvements, dans des douilles de guidage (44) disposées dans le corps du vérin (3ʹ, 3ʺ).
6. Vérin élévateur qui peut être actionné par un fluide sous pression suivant l'une quelconque des revendications précédentes caractérisé en ce que la tige d'élévation (2) est pourvue d'un joint d'étanchéité glissant (36) qui est disposé entre chacun des creux de blocage (13, 14) et le piston de travail (7).
7. Vérin élévateur qui peut être actionné par un fluide sous pression suivant l'une quelconque des revendications précédentes caractérisé en ce que la tige d'élévation (2) est construite avec une partie (6) de largeur de section transversale plus petite, du côté du corps du vérin, et sur cette partie de largeur réduite sont fixés des manchons de verrouillage (39) pourvu des creux de blocage marginaux (13, 14), ainsi qu'un disque annulaire (40) formant le piston de travail (7) à double effet.
8. Vérin élévateur qui peut être actionné par un fluide sous pression suivant la revendication 7 caractérisé en ce qu'une paroi latérale de chacun des creux de blocage (13, 14) formés dans les manchons de verrouillage (39), est constitué par une bague de paroi latérale durcie (46) qui peut être insérée dans une gorge annulaire (45) prévue dans le manchon de verrouillage ( 39 ).
9. Vérin élévateur qui peut être actionné par un fluide sous pression suivant les revendications 6 et 7 ou les revendications 6 et 8 caractérisé en ce que chacun des manchons de verrouillage (39) est pourvu, à son extrémité, une partie restreinte de retenue (47) pour le montage amovible des joints d'étanchéité glissants (36).
10. Vérin élévateur qui peut être actionné par un fluide sous pression suivant l'une quelconque des revendications (7, 8 ou 9) caractérisé en ce que les manchons de verrouillage (39) et le disque annulaire (40) formant le piston de travail (7) sont rendus solidaire de la tige d'élévation (2) au moyen d'une vis (42) qui peut être vissée dans la face frontale (41) de la partie (6) de plus petite largeur de la tige d'élévation.
EP87302404A 1986-03-22 1987-03-20 Dispositif pneumatique comportant piston et cylindre à double effet Expired - Lifetime EP0246736B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87302404T ATE60938T1 (de) 1986-03-22 1987-03-20 Doppeltwirkende druckluft-kolben- und zylindervorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863609765 DE3609765A1 (de) 1986-03-22 1986-03-22 Druckmittelbetaetigbarer hubzylinder fuer vorzugsweise entlueftungseinrichtungen
DE3609765 1986-03-22

Publications (2)

Publication Number Publication Date
EP0246736A1 EP0246736A1 (fr) 1987-11-25
EP0246736B1 true EP0246736B1 (fr) 1991-02-20

Family

ID=6297062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302404A Expired - Lifetime EP0246736B1 (fr) 1986-03-22 1987-03-20 Dispositif pneumatique comportant piston et cylindre à double effet

Country Status (4)

Country Link
EP (1) EP0246736B1 (fr)
AT (1) ATE60938T1 (fr)
AU (1) AU589505B2 (fr)
DE (2) DE3609765A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3814003A1 (de) * 1988-03-26 1989-10-12 Colt Int Holdings Druckmittelbetaetigbarer hubzylinder fuer vorzugsweise entlueftungseinrichtungen
DE4013953A1 (de) * 1990-04-30 1991-10-31 Knorr Bremse Ag Arbeitszylinder fuer die betaetigung von lueftungs- und brandschutzklappen
DE4221230C1 (fr) * 1992-06-27 1993-07-08 Messerschmitt-Boelkow-Blohm Ag, 8012 Ottobrunn, De
US5365828A (en) * 1992-06-27 1994-11-22 Deutsche Aerospace Ag Pneumatic linear drive comprising a locking mechanism for end positions
DE4323846C1 (de) * 1993-07-16 1994-11-10 Deutsche Aerospace Pneumatischer Linearantrieb mit Endlagenverriegelung
DE19828199C2 (de) * 1998-06-25 2000-04-20 Daimler Chrysler Ag Absperrventil
DE202005018038U1 (de) * 2005-11-18 2006-01-12 Festo Ag & Co. Fluidbetätigter Arbeitszylinder mit Endlagenverriegelung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889576A (en) * 1969-06-13 1975-06-17 Sheffer Corp Locking cylinder with improved locking structure
DE2036716B2 (de) * 1970-07-24 1978-03-09 Grescha-Gesellschaft Grefe & Scharf, 4811 Leopoldshoehe Vorrichtung zum Offnen und Schhessen von Entluftungseinrichtungen, wie Rauch und Feuerentluftungsklappen oder dgl
DE3018920C2 (de) * 1980-05-17 1986-01-09 Rolf 4515 Bad Essen Andexser Verriegelung für Kolben von Druckmittelzylindern
JPS6116411Y2 (fr) * 1981-05-29 1986-05-21
AU557669B2 (en) * 1981-08-04 1987-01-08 Alfarm Australia Limited Hydraulic cylinder with locking mechanism

Also Published As

Publication number Publication date
AU7015987A (en) 1987-09-24
EP0246736A1 (fr) 1987-11-25
DE3768049D1 (de) 1991-03-28
ATE60938T1 (de) 1991-03-15
AU589505B2 (en) 1989-10-12
DE3609765A1 (de) 1987-09-24

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