EP0170873B1 - Fluid pressure-operated locking cylinder for controlling cover plates, especially aerating blinds - Google Patents

Fluid pressure-operated locking cylinder for controlling cover plates, especially aerating blinds Download PDF

Info

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)
French (fr)
Other versions
EP0170873A1 (en
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/en
Application granted granted Critical
Publication of EP0170873B1 publication Critical patent/EP0170873B1/en
Expired legal-status Critical Current

Links

Images

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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)

Description

Die Erfindung bezieht sich auf einen druckmittelbetätigten, doppeltwirkenden Rastierungszylinder gemäss dem Oberbegriff des Anspruches 1 .The invention relates to a pressure-operated, double-acting detent cylinder according to the preamble of claim 1.

Ein derartiger Rastierungszylinder ist aus der DE-A-1.426.552 bekannt. Hierbei ist der Arbeitskolben zentral von einem gehäusefesten Rohr verschieblich durchsetzt, welches an seinem freien Ende die Kugelkäfige für die Kugeln der Kugelgesperre bildet. Innerhalb dieses Rohres befindet sich die Steuerstange, welche auf den einander abgewandten Seiten der inneren Sperringe die diesen zugeordneten Schultern aufweist. Die Druckmittelanschlüsse befinden sich an einem den Steuerkolben aufnehmenden Zylinderende, die Beaufschlagung des anschlussseitigen Arbeitszylinderraumes erfolgt nahezu unmittelbar aus dem einen Druckmittelanschluss, und der andersseitige Arbeitszylinderraum ist durch einen aussen am Arbeitszylinder entlanggeführten Druckmittelkanal mit dem anderen Druckmittelanschluss verbunden. Trotz des verschieblichen und komplizierten 1 neinandergreifens dreier Teile - der hohlen Kolbenstange, des Rohres und der Steuerstange- ist also keine innere Druckzuführung zum anschlussfernen Arbeitszylinderraum vorhanden. Auch fehlen eine Handbetätigung und eine rüttelfeste Sicherung gegen ungewollte Verstellungen im drucklosen Zustand.Such a locking cylinder is known from DE-A-1,426,552. Here, 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. 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. Despite the displaceable and complicated interlocking of three parts - the hollow piston rod, the tube and the control rod - there is no internal pressure supply to the working cylinder space remote from the connection. There is also no manual operation and vibration-proof protection against unwanted adjustments in the depressurized state.

Aus der US-A-2.887.991 ist ein Rastierungszylinder bekannt, dessen Kolben beidseitig Ringsansätze trägt, die mit radialen Bohrungen zur Aufnahme der Kugeln der Kugelgesperre versehen sind und so als Kugelkäfige dienen.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.

Die FR-A-47260 zeigt einen Rastierungszylinder, der an beiden Enden je einen Steuerkolben für die Kugelgesperre benötigt; er ist zudem an beiden Enden mit je einer Handbetätigung für den dortigen Steuerkolben ausgestattet.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.

Aufgabe der Erfindung ist es, einen konstruktiv weitgehend einfach aufgebauten und kostenmässig besonders günstig herstellbaren Zylinder der eingangs genannten Art anzugeben, der in den verriegelten Endlagen des Kolbens besonders hohe Kräfte sicher aufzunehmen vermag. Dabei soll eine Ausbildungsmöglichkeit bestehen, dass vorzugsweise im drucklosen Zustand die Verriegelung auch von Hand gelöst werden kann. Die Druckmittelzuführungen zu dem doppelt beaufschlagbaren Zylinder sollen zusammen mit der Handentriegelung an einem Zylinderende angeordnet werden können.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. There should be a training option that 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.

Die Aufgabe wird erfindungsgemäss mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst.The object is achieved according to the invention with the characterizing features of claim 1.

VorteilhafteAusführungen ergeben sich aus den Merkmalen der Unteransprüche.Advantageous designs result from the features of the subclaims.

Die Erfindung wird anhand eines Ausführungsbeispieles im einzelnen beschrieben und erläutert, das in einer zugehörigen Zeichnung schematisch dargestellt ist. Die Zeichnung zeigt einen Längsschnitt durch einen Rastierungszylinder 1 mit einem Zylindergehäuse 2, in dem ein Arbeitskolben 3 zwischen zwei Flanschringen 4 und 5 verschieblich ist. An dem Arbeitszylinder 3 greift eine Kolbenstange 6 an, die durch das rechte eine Ende 7 des Zylindergehäuses 2 druckdicht verschieblich hindurchgeführt ist.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.

Am Arbeitskolben 3 ist beidseitig je ein Ringansatz 8 und 9 vorgesehen, die mit dem Arbeitskolben einstückig sind. Beide Ringansätze 8 weisen jeweils über ihrem Umfang gleichmässig verteilt z.B. drei radiale Bohrungen auf, von denen in der Schnittzeichnung jeweils zwei Bohrungen 10, 10' bzw. 11, 11' geschnitten sind. Der Längsschnitt durch den Rastierungszylinder 1 wird von zwei sich in der Längsachse schneidenden Schnittebenen gebildet, die einen Winkel von 120 Grad bilden. In den Bohrungen befinden sich Kugeln, von denen die Kugeln 12, 12' bzw. 13, 13' dargestellt sind.On the working piston 3, 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.

Es ist klar, dass zu einem Kugelgesperre in einem Ringansatz 8 bzw. 9 des Kolbens 3 jeweils drei Kugeln gehören, die mit geringem Spiel in die Bohrung der Ringansätze eingreifen.It is clear that 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.

Durch den Arbeitskolben 3 ist druckdicht eine hohle Steuerstange 14 geführt. Hierzu besitzt der als Ringkolben ausgebildete Arbeitskolben 3 zwei Innendichtungen 15, 16, die am Umfang der Steuerstange 14 unter Vorspannung dichtend anliegen. Die Steuerstange 14 ist mit ihrem einen Ende durch das linke andere Ende 17 des Zylindergehäuses 1 druckdichtverschieblich geführt. Hierzu befindet sich im linken Gehäuseboden bzw. Gehäusedeckel eine Nut 18 zur Aufnahme eines Dichtungsringes 19, der unter Vorspannung dichtend an der Oberfläche der Steuerstange 14 anliegt. An der durch das Gehäuseende 17 hindurchgeführten Steuerstange 14 greift ein Handgriff 20 fest an, mit dem die Steuerstange von Hand verschieblich ist. Die Steuerstange 14 ist in fester Verbindung mit einem Steuerkolben 21, der einen wesentlich kleineren Durchmesser als der Arbeitskolben 3 aufweist. Der Steuerkolben 21 ist in einem Steuerzylinderraum verschieblich, der durch den Steuerkolben 21 in die Steuerzylinderräume 22 und 23 unterteilt ist.A hollow control rod 14 is guided through the working piston 3 in a pressure-tight manner. For this purpose, 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. For this purpose, there is a groove 18 in the left-hand housing base or housing cover for receiving a sealing ring 19, which bears sealingly against the surface of the control rod 14 under pretension. On the control rod 14 passed through the housing end 17, 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.

Entsprechend ist der Arbeitskolben 3 in einem Arbeitszylinderraum verschieblich, der durch den Arbeitskolben in die Arbeitszylinderräume 24 und 25 unterteilt ist. Die beiden Zylinder 3 und 21 sind koaxial zueinander angeordnet und der Steuerzylinderraum 22 schliesst unmittelbar an den Arbeitszylinderraum 25 an.Correspondingly, 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.

Die hohle Steuerstange 14 ist verschieblich in der hohlen Kolbenstange 6 geführt. Hierzu sind nahe dem rechten Ende 26 der Steuerstange radiale Bolzen 27, 27' vorgesehen. Es ist klar, dass die Erfindung auf eine derartige Führung der Steuerstange 14 innerhalb der Kolbenstange 3 nicht beschränkt ist und dass einem Fachmann sich ohne weiteres vergleichbare Führungen für die Steuerstange 14 innerhalb der Kolbenstange 3 anbieten.The hollow control rod 14 is slidably guided in the hollow piston rod 6. For this purpose, 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.

Auf der Steuerstange 14 befinden sich zwei Sperringe 28 und 29, die den gehäusefesten Flanschringen 4 und 5 gegenüberliegen. Die Sperringe sind in einem festen Mindestabstand voneinander gehalten, und hierzu sind die Sperringe 28, 29 auf verjüngten Endabschnitten 30, 31 gelagert, die über Schultern 32, 33 an einen mittleren Abschnitt 34 der Steuerstange 14 anschliessen. An den Schultern stützen sich die gleich ausgebildeten Sperringe 28, 29 ab.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.

Die Flanschringe 4 und 5 besitzen an ihren radial inneren Stirnflächen schalenförmig nach innen gekrümmte Widerlagerflächen 35 und 36. Entsprechend besitzen die Sperringe 28 und 29 an ihrem radial äusseren Umfang nach innen gekrümmte Widerlagerflächen 37 und 38. Wie die Zeichnung zeigt, sind die Kugeln 13,13' des linken Kugelgesperres im Ringansatz 9 des Arbeitskolbens 3 zwischen den Widerlagerflächen 35 und 37 eingesperrt. Die Widerlagerflächen 35 und 37 sind derart ausgebildet, dass auf die Kolbenstange 6 des in seiner einen Endlage befindlichen Arbeitskolbens in axialer Richtung des Pfeiles 39 hohe Kräfte wirken können, die über die Widerlagerflächen 35 und 37 auf das Zylindergehäuse 2 geleitet werden.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. Correspondingly, the locking rings 28 and 29 have on their radially outer circumference inwardly curved abutment surfaces 37 and 38. As the drawing shows, the balls 13, 13 'of the left ball ratchet locked in the ring shoulder 9 of the working piston 3 between the abutment surfaces 35 and 37. 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.

Damit der Arbeitskolben in seine gesperrten Endlagen gelangen kann, sind die Sperringe 28, 29 jeweils gegen eine Feder 40 bzw. 41 verschieblich auf der Steuerstange 14 gelagert. Die Feder 41 stützt sich an den Steuerkolben 21 und die Feder 40 stützt sich an den Führungsbolzen 27, 27' ab. Die Sperringe 28, 29 besitzen jeweils eine keilförmige Gestalt mit Schrägflächen 42, 43. Wird der Arbeitskolben 3 in die dargestellte rastierte Endlageverschoben, so laufen die Kugeln 13,13'auf die Schrägfläche 43 des Sperringes 29 auf und drükken diesen dabei aus seiner dargestellten Stellung entgegen der Federkraft der Feder 41 nach links in Richtung des Steuerkolbens 21, bis die Kugeln in die gehaüsefesten Widerlagerflächen 37 am Flanschring 4 einschnappen können. Der Sperring 29 wird dann durch die Federkraft der Feder 41 in die dargestellte Ausgangsstellung nach rechts zurückbewegt. Um die dargestellte linke Sperrstellung des Kolbens 3 zu lösen, kann der Steuerkolbenraum 22 mit Druckmittel beaufschlagt werden, wodurch der Steuerkolben 21 mit der Steuerstange 14 nach links bewegt wird. Der an der Schulter 33 festliegende Sperring 29 wird dabei zusammen mit der Steuerstange nach links bewegt, wodurch das eine Kugelgesperre mit den Kugeln 13, 13' freigegeben wird. Auf diese Weise ist die Rastierung des Arbeitskolbens 3 in seiner dargestellten linken Endlage aufgehoben. Gleichzeitig ist der Sperring 28 aus seiner dargestellten sperrfreien Stellung in die Sperrstellung verschoben. Wird nunmehr der Arbeitskolben 3 nach rechte in seine rechte Endlage verschoben, so laufen die Kugeln 12, 12' auf die Schrägfläche 42 des Sperringes 28 auf und verschieben diesen entgegen der Federkraft der Feder 40 soweit nach rechts, bis die Kugeln 12, 12' in die gehäusefesten Widerlagerflächen 36 am Flanschring 4 einschnappen können. Der Sperring 28 wird dann durch die Federkraft der Feder 40 wieder in seine Sperrstellung nach links zurückgedrückt.So that the working piston can reach its locked end positions, 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. In order to release the illustrated left locking position of the piston 3, 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. At the same time, the locking ring 28 is shifted from its locked position into the locked position. If the working piston 3 is now shifted to the right into its right end position, the balls 12, 12 'run onto the inclined surface 42 of the locking ring 28 and move it counter to the spring force of the spring 40 to the right until the balls 12, 12' in the abutment surfaces 36 fixed to the housing can snap onto the flange ring 4. The locking ring 28 is then pushed back into its locking position to the left by the spring force of the spring 40.

Um die rechte Sperrstellung des Kolbens 3 zu lösen, kann der Steuerkolbenraum 23 mit Druckluft beaufschlagt werden, wodurch der Steuerkolben 21 mit der Steuerstange 14 nach rechts bewegt wird. Hierbei wird der an der Schulter 32 festliegende Sperring 28 zusammen mit der Steuerstange 14 nach rechts verschoben, wodurch nunmehr das andere Kugelgesperre mit den Kugeln 12, 12' freigegeben wird. Die Schrägflächen 42 und 43 der Sperringe 28 und 29 sind derart ausgebildet, dass die Kugeln der beiden Kugelgesperre ohne Selbsthemmung auflaufen können.In order to release the right locked position of the piston 3, the 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. Here, 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.

Während der Kolbenhub des Arbeitskolbens 3 durch die Flanschringe 4 und 5 begrenzt ist, ist der Kolbenhub des Steuerzylinders 21 durch den Handgriff 20 und die innere Zylindergehäuse-Stirnwand 44 begrenzt. Es ist klar, dass der Kolbenhub des Steuerkolbens 21 auch auf andere Weise begrenzt werden kann. Im drucklosen Zustand kann der in seiner einen oder anderen Endlage gesperrte Kolben durch Ziehen bzw. Drücken an dem Handgriff 20 gelöst werden. Damit sich die Kugelgesperre in den Endlagen des Arbeitskolbens 3 im drucklosen Zustand nicht von selbst lösen können, ist am Ende 26 der Steuerstange in einer Nut ein radial vorstehender Federring 45 vorgesehen, hinter den eine radial nach innen vorspringende Schulter 46 an der Kolbenstange 6 greift. Um den Arbeitskolben 3 mit der Kolbenstange 6 aus seiner dargestellten einen Endlage lösen zu können, muss der Federring 45 von der Schulter 46 überfahren werden. Hierzu sind Kräfte erforderlich, die grösser sind als die max. auftretenden Rüttelkräfte am Arbeitskolben 3 bzw. an der Kolbenstange 6. Es ist klar, dass der Federring 46 auch an einer anderen Stelle, z.B. im Bereich des Handgriffes 20 vorgesehen sein kann.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. In the depressurized state, 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. 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.

Die Steuerstange 14 ist hohl ausgebildet. Auf diese Weise können vorteilhafterweise beide Druckmittelanschlüsse 47, 48 zusammen mit dem Handgriff 20 am einen Ende des Zylindergehäuses 2, z.B. am Zylinderdeckel, angeordnet sein. Im Beispielsfalle liegen die beiden Druckmittelanschlüsse 47, 48 einander gegenüber. Der eine Druckmittelanschluss 47 ist an den Steuerzylinderraum 23 und über die Bohrungen 49 und 50 in der Steuerstange 14 auch an den Arbeitszylinderraum 24 angeschlossen. Der andere Druckmittelanschluss 48 ist an den Steuerzylinderraum 22 und an den Arbeitszylinderraum 25 angeschlossen.The control rod 14 is hollow. In this way, advantageously 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. In the example, 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.

Wird der Anschluss 48 mit Druckmittel z.B. Druckluft beaufschlagt, und ist der Anschluss 47 an Atmosphäre geschaltet, so wird der Steuerkolben 21 bis zur inneren Zylindergehäuse-Stirnfläche 44 nach links bewegt. Dabei kommt die Kolbenverriegelung für die linke Endlage des Arbeitskolbens 3 frei und der Arbeitskolben 3 wird in seine rechte Endlage verschoben und wie vorstehend beschrieben verriegelt. Wird anschliessend der Anschluss 47 mit Druckmittel beaufschlagt und der Anschluss 48 an Atmosphäre gelegt, dann werden die Räume 23 und 24 mit Druckmittel beaufschlagt, wodurch zunächst der Steuerkolben in seine dargestellte Stellung verfahren wird, um die Rastierung in der rechten Endlage des Arbeitskolbens wieder zu lösen und gleichzeitig die erneute Rastierung des Arbeitskolbens in der linken Endlage vorzubereiten. Anschliessend wird der Arbeitskolben 3 wieder in seine linke Endlage zurückbewegt und dort wie oben beschrieben gesperrt.If the 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. If the 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.

Es ist klar, dass die Erfindung nicht auf Kolbenstangenzylinder beschränkt ist. Die erfindungsgemässe Rastierung ist auch für kolbenstangenlose-Zylinder geeignet.It is clear that the invention is not limited to piston rod cylinders. The detent according to the invention is also suitable for rodless cylinders.

BezugszeichenlisteReference symbol list

  • 1 Rastierungszylinder1 locking cylinder
  • 2 Zylindergehäuse2 cylinder housings
  • 3 Arbeitskolben3 working pistons
  • 4 u. 5 Flanschringe4 u. 5 flange rings
  • 6 Kolbenstange6 piston rod
  • 7 das eine Ende des Zylindergehäuses 27 one end of the cylinder housing 2
  • 8 u. 9 Ringansätze am Arbeitskolben 38 u. 9 lugs on the working piston 3
  • 10 u. 10' Bohrungen im Ringansatz 810 u. 10 'holes in the ring shoulder 8
  • 11 u. 11' Bohrungen im Ringansatz 911 u. 11 'holes in the ring shoulder 9
  • 12 u. 12' Kugeln in den Bohrungen 10 und 10'12 u. 12 'balls in the bores 10 and 10'
  • 13 u. 13' Kugeln in den Bohrungen 11 und 11'13 u. 13 'balls in the bores 11 and 11'
  • 14 Steuerstange14 control rod
  • 15. u. 16 Innendichtungen am Arbeitskolben 315. u. 16 inner seals on the working piston 3
  • 17 das andere Ende des Zylindergehäuses 217 the other end of the cylinder housing 2
  • 18 Nut18 groove
  • 19 Dichtungsring in der Nut 1819 sealing ring in the groove 18
  • 20 Handgriff20 handle
  • 21 Steuerkolben21 control pistons
  • 22 u. 23 Steuerzylinderräume22 u. 23 control cylinder rooms
  • 24 u. 25 Arbeitszylinderräume24 u. 25 working cylinder rooms
  • 26 das eine Ende der Steuerstange26 one end of the control rod
  • 27 u. 27' Bolzen27 u. 27 'bolt
  • 28 u. 29 Sperringe28 u. 29 locking rings
  • 30 u. 31 Endabschnitte der Steuerstange30 u. 31 end sections of the control rod
  • 32 u. 33 Schultern der Endabschnitte 30 und 3132 u. 33 shoulders of end sections 30 and 31
  • 34 mittlerer Abschnitt der Steuerstange 1434 central section of the control rod 14
  • 35 u. 36 radial äussere Widerlagerflächen35 u. 36 radially outer abutment surfaces
  • 37 u. 38 radial innere Widerlagerflächen37 u. 38 radially inner abutment surfaces
  • 39 Pfeil39 arrow
  • 40 u. 41 Federn40 u. 41 springs
  • 42 u. 43 Schrägflächen der Sperringe 28 und 2942 u. 43 inclined surfaces of the locking rings 28 and 29
  • 44 innere Zylindergehäuse-Stirnfläche44 inner cylinder housing face
  • 45 Federring45 spring washer
  • 46 Schulter46 shoulder
  • 47 u. 48 Druckmittelanschlüsse .47 u. 48 pressure medium connections.
  • 49 u. 50 Bohrungen in der Steuerstange 1449 u. 50 holes in the control rod 14

Claims (8)

1. Pressure-means-operated, double-acting locking cylinder (1) for controlling at least one cover means, in particular ventilation shutters, with
- two pressure means connections (47, 48) arranged on one end of the locking cylinder (1),
- one working piston (3), able to be acted upon on both sides, displaceable between two end positions and
- a device containing two axially spaced ball locking mechanisms (balls 12,12' and 13,13') for mechanically locking the working piston (3) in both its end positions and for release of the working piston (3) and its subsequent displacement from one of its end positions to the other or vice versa under the control of pressure means, whereby
- both end positions of the working piston (3) are determined by mountings (4, 5) fixed to the cylinder housing and corresponding to the ball locking mechanisms (balls 12, 12' and 13, 13'),
- and a central control rod (14) is provided passing through the working piston (3) in a displaceable manner, movable by a control piston (21) between two endpoints, on which rod inner locking rings (28, 29) are arranged in a displaceable manner opposite the mountings, which rings have radially inner bearing areas (37, 38) on the ball side, so that each locks one set of balls (12,12' and 13, 13') of a ball locking mechanism distributed uniformly over the periphery in one end position of the working piston (3), the inner locking rings (28, 29) being oppositely spring-loaded (springs 40, 41 ) toward one another and pressed toward shoulders (32, 33) arranged on the control rod (14),

characterised in that
- on each side of the working piston (3) there is arranged a ball locking mechanism the balls of which (12,12' and 13,13') are held on the working piston (3),
- the mountings are constructed as outer flanged rings (4, 5) which for locking the balls (12, 12' or 13, 13') of each ball locking mechanism in one end position of the working piston (3) have radially outer areas (35, 36) on the ball side,
- the shoulders (32,33) of the control rod (14) are arranged between both inner locking rings (28, 29),
- the control rod (14) is guided, in a sealed and displaceable manner, in the working piston (3), and
- one pressure means connection (47) is connected to the working cylinder chamber (24) on the far side of the pressure means connections (47, 48) and on one side of the working piston (3) through the control rod (14), which is hollow, and the other pressure means connection (48) is connected in known manner to the other working cylinder chamber (25) on the other side of the working piston (3).
2. Cylinder according to claim 1, characterised in that the control rod (14), passing through the base (17) of the cylinder housing (2) in such a way that it is impermeable to the pressure means, is provided with a manual operating means (20).
3. Cylinder according to claim 1 or 2, characterised in that the control rod (14) is provided with a mechanical vibration safety fastening device (spring ring 45, shoulder 46) to the cylinder base or to the hollow piston rod (6) of the working piston (3).
4. Cylinder according to claim 1,2 or 3, characterised in that the working piston (3) has on both sides cylindrical ring bosses (8, 9) each of which is designed as a ball cage for the balls (12, 12' or 13,13') of one ball locking mechanism.
5. Cylinder according to claim 4, characterised in that the ring bosses (8, 9) each have radial bores (10,10' and 11,11') corresponding to the number of balls (12, 12' and 13, 13') of a ball locking mechanism in which bores the balls (12, 12' and 13, 13') are held, the bores (10, 10' and 11, 11') narrowing outwards on the outer periphery of the ring bosses (8,9) to hinder exit of the balls (12,12' and 13, 13') from the ring bosses (8, 9), and the balls (12, 12' and 13, 13') are supported radially inwards when not in the locking positions by the outer peripheral surface of the control rod (14).
6. Cylinder according to claim 2, characterised in that both pressure means connections (47, 48) are arranged in an opposing manner on the cylinder cover (17) and that the manual operating means (20) is arranged centrally on the cylinder cover (17).
EP85108122A 1984-07-31 1985-07-01 Fluid pressure-operated locking cylinder for controlling cover plates, especially aerating blinds Expired EP0170873B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843428228 DE3428228A1 (en) 1984-07-31 1984-07-31 PRESSURE-OPERATED LOCKING CYLINDERS FOR THE OPERATION OF COVERING ORGANS, IN PARTICULAR VENTILATION AND VENTILATION BLINDS
DE3428228 1984-07-31

Publications (2)

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

Family

ID=6242030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108122A Expired EP0170873B1 (en) 1984-07-31 1985-07-01 Fluid pressure-operated locking cylinder for controlling cover plates, especially aerating blinds

Country Status (2)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005054686A1 (en) * 2003-12-04 2005-06-16 Razorback Vehicles Corporation Limited A pneumatic or hydraulic cylinder lock assembly

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 (en) * 1988-05-18 1989-11-23 Josef Fortmeier Pressure-medium cylinder for actuating ventilation and smoke-outlet louvres
EP0692640A3 (en) * 1994-06-14 1997-07-30 Rasmussen Kann Ind As A pressure medium controlled operator device for opening and closing a roof window or a hatch
CN103486108B (en) * 2013-10-17 2015-09-30 济南夫驰科技有限公司 A kind of cylinder with two self-locking structure
CN104763706B (en) * 2015-04-02 2016-08-17 中船重工中南装备有限责任公司 Mechanical self-locking hydraulic cylinder
CA2895679C (en) * 2015-06-26 2017-12-12 V-Bond Lee Dual locking hydraulic actuator for structural brace
EP3109487A1 (en) * 2015-06-26 2016-12-28 SPP Canada Aircraft, Inc. Dual locking hydraulic actuator for structural brace
CN108590996B (en) * 2018-04-13 2020-03-27 台州动林汽车空调压缩机有限公司 Air-conditioning compressor
CN109268342B (en) * 2018-11-23 2020-09-18 北京精密机电控制设备研究所 Actuator cylinder with two-end steel ball mechanical lock
CN116857254B (en) * 2023-09-01 2023-12-15 常州亿麟电气科技有限公司 Electric hydraulic system

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 (en) * 2003-12-04 2005-06-16 Razorback Vehicles Corporation Limited A pneumatic or hydraulic cylinder lock assembly

Also Published As

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

Similar Documents

Publication Publication Date Title
AT511833B1 (en) MASTER CONSTRUCTION, ESPECIALLY FOR A AUTOBETON PUMP
EP0170873B1 (en) Fluid pressure-operated locking cylinder for controlling cover plates, especially aerating blinds
DE19950582B9 (en) Actuating device for a rotatable closure part of a valve
DE2823667C2 (en) Air motor
DE2616973C3 (en) Pneumatic working cylinder for actuation and stepless locking of actuators
EP0363575B1 (en) Pneumatic actuator with locking means in the end positions, especially for actuating smoke extractor flues
DE2911071A1 (en) Ram piston locking mechanism - has locking pieces in circle between annular guide and locking slide
DE3138812A1 (en) Eccentric drive with stroke adjustment
DE4128389A1 (en) Double acting cylinder with ring piston and central piston - with dimensioning of effective surfaces to ensure pistons can move to mid-point
DE2425385C3 (en) Pneumatic-mechanical blind riveting tool
DE8507555U1 (en) Clamping body for the mutual alignment and tensioning of the ends of a pipe pair
DE19649178A1 (en) Heavy duty hydraulic or compressed air cylinder
DE1223257B (en) Pneumatic three-position working cylinder
DE2636117A1 (en) PRESSURE MEDIUM DRIVE WITH OPERATING PISTON
DE3137141C2 (en) Working cylinder
DE965127C (en) Slider for steam controls
DE1218812B (en) Pinch roller overrunning clutch
DE2520326A1 (en) MULTI-WAY VALVE
DE1625430A1 (en) Cylinder design
DE2523745A1 (en) ACTUATION DEVICE FOR A HYDRAULIC PRESS
DE3132430C2 (en) Working cylinder for pneumatic or hydraulic working media
DE2006292A1 (en) Sealing arrangement
DES0028929MA (en)
EP0250781A2 (en) Hydraulic force-transmitting element
DE3810183A1 (en) Device for locking a piston rod of a piston/cylinder arrangement

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI NL

17P Request for examination filed

Effective date: 19860507

17Q First examination report despatched

Effective date: 19870128

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19870916

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19870916

REF Corresponds to:

Ref document number: 3560649

Country of ref document: DE

Date of ref document: 19871022

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920525

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19920731

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930731

Ref country code: CH

Effective date: 19930731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19940201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040614

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040621

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20050630

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20