EP0170873B1 - Cylindre de blocage à fluide sous pression pour commander des plaques de couverture, en particulier des jalousies de ventilation - Google Patents

Cylindre de blocage à fluide sous pression pour commander des plaques de couverture, en particulier des jalousies de ventilation Download PDF

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Publication number
EP0170873B1
EP0170873B1 EP85108122A EP85108122A EP0170873B1 EP 0170873 B1 EP0170873 B1 EP 0170873B1 EP 85108122 A EP85108122 A EP 85108122A EP 85108122 A EP85108122 A EP 85108122A EP 0170873 B1 EP0170873 B1 EP 0170873B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
working piston
balls
piston
locking
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
Application number
EP85108122A
Other languages
German (de)
English (en)
Other versions
EP0170873A1 (fr
Inventor
Heimo Hübner
Peter Pick
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.)
Knorr Bremse AG
Original Assignee
Knorr Bremse 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 Knorr Bremse AG filed Critical Knorr Bremse AG
Publication of EP0170873A1 publication Critical patent/EP0170873A1/fr
Application granted granted Critical
Publication of EP0170873B1 publication Critical patent/EP0170873B1/fr
Expired 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 pressure-operated, double-acting detent cylinder according to the preamble of claim 1.
  • Such a locking cylinder is known from DE-A-1,426,552.
  • the working piston is displaceably penetrated centrally by a housing-fixed tube, which forms the ball cages for the balls of the ball lock at its free end.
  • the control rod Within this tube is the control rod, which has the shoulders assigned to it on the opposite sides of the inner locking rings.
  • the pressure medium connections are located on one end of the cylinder receiving the control piston, the pressure on the connection-side working cylinder space is almost immediate from the one pressure medium connection, and the other-side working cylinder space is connected to the other pressure medium connection by a pressure medium channel running along the outside of the working cylinder.
  • a locking cylinder is known from US Pat. No. 2,887,991, the piston of which carries ring projections on both sides, which are provided with radial bores for receiving the balls of the ball lock and thus serve as ball cages.
  • the FR-A-47260 shows a detent cylinder, which requires a control piston for the ball lock at both ends; it is also equipped with a manual override at each end for the control piston there.
  • the object of the invention is to provide a cylinder of the type mentioned at the outset which is of a structurally largely simple design and which can be produced particularly cost-effectively and which can reliably absorb particularly high forces in the locked end positions of the piston.
  • the lock can also be released by hand, preferably in the depressurized state.
  • the pressure medium feeds to the double-acting cylinder should be able to be arranged together with the manual release at one end of the cylinder.
  • the invention is described and explained in detail using an exemplary embodiment, which is shown schematically in an associated drawing.
  • the drawing shows a longitudinal section through a locking cylinder 1 with a cylinder housing 2, in which a working piston 3 between two flange rings 4 and 5 is displaceable.
  • a piston rod 6 engages on the working cylinder 3 and is passed through the right end 7 of the cylinder housing 2 so that it can be moved in a pressure-tight manner.
  • a ring extension 8 and 9 are provided on both sides, which are integral with the working piston.
  • Both ring lugs 8 each have an even distribution, e.g. three radial holes, of which two holes 10, 10 'and 11, 11' are cut in the sectional drawing.
  • the longitudinal section through the locking cylinder 1 is formed by two cutting planes intersecting in the longitudinal axis, which form an angle of 120 degrees. There are balls in the bores, of which the balls 12, 12 'and 13, 13' are shown.
  • a ball ratchet in a ring extension 8 or 9 of the piston 3 each includes three balls which engage in the bore of the ring extensions with little play.
  • a hollow control rod 14 is guided through the working piston 3 in a pressure-tight manner.
  • the working piston 3 which is designed as an annular piston, has two inner seals 15, 16, which bear tightly against the circumference of the control rod 14 under prestress.
  • the control rod 14 is guided with one end through the other left end 17 of the cylinder housing 1 so that it can be moved in a pressure-tight manner.
  • a handle 20 engages with which the control rod can be moved by hand.
  • the control rod 14 is in fixed connection with a control piston 21, which has a much smaller diameter than the working piston 3.
  • the control piston 21 is displaceable in a control cylinder space, which is divided into the control cylinder spaces 22 and 23 by the control piston 21.
  • the working piston 3 is displaceable in a working cylinder space which is divided into the working cylinder spaces 24 and 25 by the working piston.
  • the two cylinders 3 and 21 are arranged coaxially to one another and the control cylinder chamber 22 connects directly to the working cylinder chamber 25.
  • the hollow control rod 14 is slidably guided in the hollow piston rod 6.
  • radial bolts 27, 27 ' are provided near the right end 26 of the control rod. It is clear that the invention is not limited to such a guide of the control rod 14 within the piston rod 3 and that comparable guides for the control rod 14 within the piston rod 3 are readily available to a person skilled in the art.
  • locking rings 28 and 29 On the control rod 14 there are two locking rings 28 and 29, which are opposite the flange rings 4 and 5 fixed to the housing.
  • the locking rings are held at a fixed minimum distance from one another, and for this purpose the locking rings 28, 29 are on tapered end sections 30, 31 mounted, which connect to a central portion 34 of the control rod 14 via shoulders 32, 33.
  • the identically designed locking rings 28, 29 are supported on the shoulders.
  • the flange rings 4 and 5 have, on their radially inner end faces, abutment surfaces 35 and 36 which are curved inwards in a shell-like manner.
  • the locking rings 28 and 29 have on their radially outer circumference inwardly curved abutment surfaces 37 and 38.
  • the abutment surfaces 35 and 37 are designed such that high forces can act on the piston rod 6 of the working piston located in its one end position in the axial direction of the arrow 39, which forces are directed onto the cylinder housing 2 via the abutment surfaces 35 and 37.
  • the locking rings 28, 29 are each slidably mounted on the control rod 14 against a spring 40 or 41.
  • the spring 41 is supported on the control piston 21 and the spring 40 is supported on the guide bolts 27, 27 '.
  • the locking rings 28, 29 each have a wedge-shaped shape with inclined surfaces 42, 43. If the working piston 3 is displaced into the latched end position shown, the balls 13, 13 'run onto the inclined surface 43 of the locking ring 29 and press it from its illustrated position counter to the spring force of the spring 41 to the left in the direction of the control piston 21 until the balls can snap into the abutment surfaces 37 fixed to the housing on the flange ring 4.
  • the locking ring 29 is then moved back to the right by the spring force of the spring 41 in the starting position shown.
  • the control piston chamber 22 can be pressurized, whereby the control piston 21 is moved to the left with the control rod 14.
  • the locking ring 29, which is fixed on the shoulder 33, is moved to the left together with the control rod, as a result of which a ball lock with the balls 13, 13 'is released. In this way, the locking of the working piston 3 in its illustrated left end position is canceled.
  • the locking ring 28 is shifted from its locked position into the locked position.
  • control piston chamber 23 can be pressurized with compressed air, whereby the control piston 21 is moved to the right with the control rod 14.
  • the locking ring 28 fixed on the shoulder 32 is moved together with the control rod 14 to the right, as a result of which the other ball lock with the balls 12, 12 'is now released.
  • the inclined surfaces 42 and 43 of the locking rings 28 and 29 are designed such that the balls of the two ball ratchets can run up without self-locking.
  • While the piston stroke of the working piston 3 is limited by the flange rings 4 and 5, the piston stroke of the control cylinder 21 is limited by the handle 20 and the inner cylinder housing end wall 44. It is clear that the piston stroke of the control piston 21 can also be limited in other ways.
  • the piston locked in one or the other end position can be released by pulling or pushing the handle 20. So that the ball lock in the end positions of the working piston 3 cannot release itself in the depressurized state, a radially projecting spring ring 45 is provided at the end 26 of the control rod in a groove, behind which a radially inwardly projecting shoulder 46 engages on the piston rod 6.
  • the spring ring 45 In order to be able to release the working piston 3 with the piston rod 6 from its one end position shown, the spring ring 45 must be run over by the shoulder 46. This requires forces that are greater than the max. occurring vibrating forces on the working piston 3 or on the piston rod 6. It is clear that the spring ring 46 also at another point, e.g. can be provided in the region of the handle 20.
  • the control rod 14 is hollow.
  • both pressure medium connections 47, 48 together with the handle 20 at one end of the cylinder housing 2 e.g. be arranged on the cylinder cover.
  • the two pressure medium connections 47, 48 lie opposite one another.
  • One pressure medium connection 47 is connected to the control cylinder chamber 23 and, via the bores 49 and 50 in the control rod 14, also to the working cylinder chamber 24.
  • the other pressure medium connection 48 is connected to the control cylinder chamber 22 and to the working cylinder chamber 25.
  • connection 48 is pressurized with compressed medium, for example compressed air, and the connection 47 is switched to atmosphere, the control piston 21 is moved to the left up to the inner cylinder housing end face 44.
  • the piston lock for the left end position of the working piston 3 is released and the working piston 3 is shifted into its right end position and locked as described above.
  • connection 47 is then pressurized and the connection 48 is exposed to the atmosphere, then the spaces 23 and 24 are pressurized, whereby the control piston is first moved into its position shown in order to release the catch in the right end position of the working piston and at the same time prepare the locking of the working piston in the left end position. Then the work piston 3 moved back to its left end position and locked there as described above.
  • the invention is not limited to piston rod cylinders.
  • the detent according to the invention is also suitable for rodless 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)
  • Fluid-Damping Devices (AREA)

Claims (8)

1. Cylindre de blocage à fluide sous pression à double effet (1) pour commander au moins une plaque de couverture, en particulier des jalousies de ventilation
- avec deux raccords de fluide sous pression (47, 48) disposés à une extrémité du cylindre de blocage (1),
- avec un piston moteur (3) coulissant entre deux positions finales et pouvant être alimenté des deux côtés, et
- avec un dispositif comportant deux verrouillages à bille décalés axialement (billes 12, 12' et 13, 13') pour le verrouillage mécanique du piston moteur (3) dans ses deux positions finales et pour le déverrouillage à commande par le fluide sous pression du piston moteur (3) et son déplacement consécutif d'une position finale à l'autre ou vice versa, où
- les deux positions finales du piston moteur (3) sont déterminées par des fixations (4, 5) solidaires du corps de cylindre et conjuguées avec les verrouillages à billes (billes 12, 12' et 13, 13'), et
- il est prévu une tige de commande centrale (14) actionnée par un piston de commande (21) entre deux butées qui traverse le piston moteur (3) en le déplaçant et sur laquelle sont disposées de façon coulissante des bagues d'arrêt intérieures (28, 29) en face des fixations qui présentent des surfaces de butée intérieures en sens radial (37, 38) du côté billes pour le verrouillage respectif de plusieurs billes (12, 12' et 13, 13') uniformément réparties sur le pourtour d'un verrouillage à billes dans une position finale du piston moteur (3), les bagues d'arrêt intérieures (28, 29) étant comprimées par ressort (ressorts 40, 41 ) en sens opposé l'une par rapport à l'autre, la compression agissant en direction des épaulements (32, 22) disposés sur la tige de commande (14),

caractérisé par le fait
- que des deux côtés du piston moteur (3) se trouve un verrouillage à billes dont les billes (12, 12' et 13,13') sont retenues au piston moteur (3) ;
- que les fixations sont conçues comme colliers extérieurs (4, 5) qui présentent du côté billes des surfaces de butée extérieures en sens radial (35,
36) pour le verrouillage des billes (12, 12' ou 13, 13') d'un verrouillage à billes respectivement dans une position finale d'un piston moteur (3);
- que les épaulements (32, 33) de la tige de commande (14) sont disposés entre les deux bagues d'arrêt intérieures (28, 29);
- que la tige de commande (14) coulisse étanche à la pression dans le piston moteur (3), et
- qu'un raccord de fluide sous pression (47) est relié par la tige de commande à conception creuse (14) à une chambre du cylindre de travail (24) plus éloignée des raccords de fluide sous pression (47, 48) d'un côté du piston moteur (3) et que l'autre raccord de fluide sous pression (48) est relié, comme on sait, à l'autre chambre du cylindre de travail (25) de l'autre côté du piston moteur (3).
2. Cylindre selon la revendication 1, caractérisé par le fait que la tige de commande (14) guidée de façon étanche au fluide sous pression à travers le fond (17) du corps de cylindre (2) est pourvue d'un dispositif d'actionnement manuel (20).
3. Cylindre selon la revendication 1 ou 2, caractérisé par le fait que la tige de commande est munie d'un dispositif de sécurité mécanique contre les vibrations (rondelle élastique 45, interrupteur 46) vers le fond du cylindre ou vers la tige du piston creuse (6) du piston moteur (3).
4. Cylindre selon la revendication 1, 2 ou 3, caractérisé par le fait que le piston moteur (3) présente des talons annulaires cylindriques (8, 9) des deux côtés formant une cage à billes respectivement pour les billes (12,12' ou 13, 13') d'un verrouillage à billes.
5. Cylindre selon la revendication 4, caractérisé par le fait que les talons annulaires (8, 9) présentent des orifices radiaux (10, 10' et 11, 11') en fonction du nombre des billes (12, 12' et 13, 13') d'un verrouillage à billes où les billes (12, 12' et 13, 13') sont retenues, les orifices (10, 10' et 11, 11') étant rétrécis vers l'extérieur à la circonférence extérieure des talons annulaires pour empêcher que les billes (12, 12' et 13, 13') ne sortent des talons annulaires et les billes (12, 12' et 13, 13') s'appuient en dehors des positions de blocage radialement vers l'intérieur sur la surface circonférentielle de la tige de commande (14).
6. Cylindre selon la revendication 2, caractérisé par le fait que les deux raccords de fluide sous pression (47, 48) sont situés l'un en face de l'autre sur le couvercle du cylindre (17) et que le dispositif d'actionnement manuel (20) est monté au centre du couvercle de cylindre (17).
EP85108122A 1984-07-31 1985-07-01 Cylindre de blocage à fluide sous pression pour commander des plaques de couverture, en particulier des jalousies de ventilation Expired EP0170873B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3428228 1984-07-31
DE19843428228 DE3428228A1 (de) 1984-07-31 1984-07-31 Druckmittelbetaetigter rastierungszylinder zur betaetigung von abdeckorganen, insbesondere be- und entlueftungsjalousien

Publications (2)

Publication Number Publication Date
EP0170873A1 EP0170873A1 (fr) 1986-02-12
EP0170873B1 true EP0170873B1 (fr) 1987-09-16

Family

ID=6242030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108122A Expired EP0170873B1 (fr) 1984-07-31 1985-07-01 Cylindre de blocage à fluide sous pression pour commander des plaques de couverture, en particulier des jalousies de ventilation

Country Status (2)

Country Link
EP (1) EP0170873B1 (fr)
DE (2) DE3428228A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005054686A1 (fr) * 2003-12-04 2005-06-16 Razorback Vehicles Corporation Limited Ensemble serrure a cylindre pneumatique ou hydraulique

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3637732C1 (en) * 1986-11-05 1988-04-28 Schmoele Metall R & G Device for shifting domelights, ventilation flaps and the like
DE3816917A1 (de) * 1988-05-18 1989-11-23 Josef Fortmeier Druckmedienzylinder zur betaetigung von lueftungs- und rauchabzugsjalousien
EP0692640A3 (fr) * 1994-06-14 1997-07-30 Rasmussen Kann Ind As Dispositif actionné par un fluide sous, pression pour l'ouverture et la fermature d'une lucarne ou d'une trappe
CN103486108B (zh) * 2013-10-17 2015-09-30 济南夫驰科技有限公司 一种具有双自锁结构的气缸
CN104763706B (zh) * 2015-04-02 2016-08-17 中船重工中南装备有限责任公司 机械自锁液压缸
CA2895679C (fr) * 2015-06-26 2017-12-12 V-Bond Lee Actionneur hydraulique a double blocage destine a un support structurel
EP3109487A1 (fr) * 2015-06-26 2016-12-28 SPP Canada Aircraft, Inc. Actionneur hydraulique à double verrouillage pour renfort structurel
CN108590996B (zh) * 2018-04-13 2020-03-27 台州动林汽车空调压缩机有限公司 空调压缩机
CN109268342B (zh) * 2018-11-23 2020-09-18 北京精密机电控制设备研究所 一种具有两端钢珠机械锁的作动筒
CN116857254B (zh) * 2023-09-01 2023-12-15 常州亿麟电气科技有限公司 一种电气液压系统

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887991A (en) * 1954-03-29 1959-05-26 Haskel Engineering Associates Fluid actuator with locking means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005054686A1 (fr) * 2003-12-04 2005-06-16 Razorback Vehicles Corporation Limited Ensemble serrure a cylindre pneumatique ou hydraulique

Also Published As

Publication number Publication date
DE3560649D1 (en) 1987-10-22
DE3428228A1 (de) 1986-02-13
EP0170873A1 (fr) 1986-02-12

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