EP0170873A1 - 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

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Publication number
EP0170873A1
EP0170873A1 EP85108122A EP85108122A EP0170873A1 EP 0170873 A1 EP0170873 A1 EP 0170873A1 EP 85108122 A EP85108122 A EP 85108122A EP 85108122 A EP85108122 A EP 85108122A EP 0170873 A1 EP0170873 A1 EP 0170873A1
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EP
European Patent Office
Prior art keywords
piston
cylinder
working piston
balls
locking
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Granted
Application number
EP85108122A
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German (de)
French (fr)
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EP0170873B1 (en
Inventor
Heimo Hübner
Peter Pick
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Knorr Bremse AG
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Knorr Bremse AG
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Publication of EP0170873A1 publication Critical patent/EP0170873A1/en
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    • 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 locking cylinder actuated by pressure means according to the preamble of claim 1.
  • Locking cylinders of the above type are known, but they have the disadvantage that the pistons can only absorb limited forces in the locked end positions. This is mainly due to the fact that the locking is caused by frictional forces that are not high enough for certain applications.
  • the object of the invention is to provide a structurally largely simple and inexpensive to manufacture cylinder of the type mentioned that is able to safely absorb particularly high forces in the locked end positions of the piston. It should be possible to release the lock by hand using a control element or, preferably, in the depressurized state.
  • the air supply to the double-acting cylinder should 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 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 left other 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 mounted on tapered end sections 30, 31 which connect to a central section 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 abutment surfaces 35 and 36 which are curved inwards in the shape of a shell on their radially inner end faces.
  • the locking rings 28 and 29 have inwardly curved abutment surfaces 37 and 38 on their radially outer circumference.
  • the abutment surfaces 35 and 37 are designed such that the piston rod 6 in its one end position located working piston in the axial direction of arrow 39 high forces can act, which are directed to 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 moved into the latched end position shown, the balls 13, 13 'run onto the inclined surface 43 of the locking ring 29 and press it out of the illustrated one Position against 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 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. At the same time, 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 can advantageously be arranged together with the handle 20 at one end of the cylinder housing 2, for example on the cylinder cover.
  • the two pressure medium connections 47, 48 lie opposite one another.
  • One pressure medium connection 47 is to the control cylinder chamber 23 and via the Bores 49 and 50 in the control rod 14 are also connected to the working cylinder space 24.
  • the other pressure medium connection 48 is connected to the control cylinder chamber 22 and to the working cylinder chamber 25.
  • connection 48 with pressure medium e.g. Compressed air, acted upon, and if 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 is released for the left end position of the working piston 3 and the working piston 3 is moved into its right end position and locked as described above.
  • connection 47 is then pressurized and the connection 48 is placed in the atmosphere, 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 working piston 3 is 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.
  • the invention is not limited to double-acting cylinders, it is also suitable for cylinders in which the piston is provided with a detent according to the invention only in one end position.
  • the pressure medium-operated detent cylinder (1) has a working piston (3) with two ring projections (8 and 9) for receiving ball ratchets (12, 12 '; 13, 13'), which are used to latch the piston (3) in its two end positions between radial engage opposite abutment surfaces (35, 37; 36, 38), of which the radially outer abutment surfaces (35, 36) are fixed to the housing and the radially inner abutment surfaces (37, 38) are mounted on a hollow control rod, which is connected to a control piston (21) for monitoring the position of the radially inner abutment surfaces (37, 38), which are each slidably mounted in the release direction against spring forces (40, 41).
  • the control rod serves to guide the pressure medium, as a result of which the pressure medium connections (47, 48) can be arranged opposite one another together with the manual actuation (20) to release the locking at one cylinder end (17).

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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)

Abstract

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 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), characterized 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 worcking 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 one side of the working piston (3) trough 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).

Description

Die Erfindung bezieht sich auf einen drrckmittelbetätigten Rastierungszylinder gemäß dem Oberbegriff des Anspruches 1.The invention relates to a locking cylinder actuated by pressure means according to the preamble of claim 1.

Es sind Rastierungszylinder der vorstehenden Art bekannt, die jedoch den Nachteil haben, daß die Kolben in den verriegelten Endlagen nur begrenzte Kräfte aufnehmen können. Das liegt vor allem daran, daß die Verriegelung durch Reibungskräfte bewirkt wird, die für bestimmte Anwendungsfälle nicht hoch genug ist.Locking cylinders of the above type are known, but they have the disadvantage that the pistons can only absorb limited forces in the locked end positions. This is mainly due to the fact that the locking is caused by frictional forces that are not high enough for certain applications.

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 die Verriegelung durch ein Steuerorgan oder vorzugsweise im drucklosen Zustand auch von Hand gelöst werden können. Die Luftzuführung zu dem doppelt beaufschlagbaren Zylinder soll zusammen mit der Handentriegelung an einem Zylinderende angeordnet werden können.The object of the invention is to provide a structurally largely simple and inexpensive to manufacture cylinder of the type mentioned that is able to safely absorb particularly high forces in the locked end positions of the piston. It should be possible to release the lock by hand using a control element or, preferably, in the depressurized state. The air supply to the double-acting cylinder should 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 with the characterizing features of claim 1.

Vorteilhafte Ausführungen ergeben sich aus den Merkmalen der Unteransprüche oder der nachstehenden Beschreibung.Advantageous embodiments result from the features of the subclaims or the description below.

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 have three balls which engage with little play in the bore of the ring extensions.

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 durckdicht verschieblich 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 left other 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 mounted on tapered end sections 30, 31 which connect to a central section 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 abutment surfaces 35 and 36 which are curved inwards in the shape of a shell on their radially inner end faces. Correspondingly, the locking rings 28 and 29 have inwardly curved abutment surfaces 37 and 38 on their radially outer circumference. 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 the piston rod 6 in its one end position located working piston in the axial direction of arrow 39 high forces can act, which are directed to 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 Endlage verschoben, so laufen die Kugeln 13, 13' auf die Schrägfläche 43 des Sperringes 29 auf und drücken diesen dabei aus seiner dargestellten Stellung entgegen der Federkraft der Feder 41 nach links in Richtung des Steuerkolbens 21, bis die Kugeln in die gehäusefesten 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 moved into the latched end position shown, the balls 13, 13 'run onto the inclined surface 43 of the locking ring 29 and press it out of the illustrated one Position against 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 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 zulösen, 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 blocking 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, both pressure medium connections 47, 48 can advantageously be arranged together with the handle 20 at one end of the cylinder housing 2, for example on the cylinder cover. In the example, the two pressure medium connections 47, 48 lie opposite one another. One pressure medium connection 47 is to the control cylinder chamber 23 and via the Bores 49 and 50 in the control rod 14 are also connected to the working cylinder space 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 with pressure medium e.g. Compressed air, acted upon, and if 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 is released for the left end position of the working piston 3 and the working piston 3 is moved into its right end position and locked as described above. If the connection 47 is then pressurized and the connection 48 is placed in the atmosphere, 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 working piston 3 is 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 kolbenst5angenlose Zylinder geeignet. Schließlich ist die Erfindung nicht auf doppeltwirkende Zylinder beschränkt, sie ist auch für Zylinder geeignet, bei denen der Kolben nur in der einen Endlage mit einer erfindungsgemäßen Rastierung versehen ist.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. Finally, the invention is not limited to double-acting cylinders, it is also suitable for cylinders in which the piston is provided with a detent according to the invention only in one end position.

Kurzfassungshort version

Der druckmittelbetätigte Rastierungszylinder (1) besitzt einen Arbeitskolben (3) mit zwei Ringansätzen (8 und 9) zur Aufnahme von Kugelgesperren (12, 12'; 13, 13'), die zur Rastierung des Kolbens (3) in seinen beiden Endlagen zwischen radial gegenüberliegenden Widerlagerflächen (35, 37; 36, 38) einrasten, von denen die radial äußeren Widerlagerflächen (35, 36) gehäusefest und die radial inneren Widerlagerflächen (37, 38) auf einer hohlen Steuerstange gelagert sind, die mit einem Steuerkolben (21) zur Überwachung der Lage der radial inneren Widerlagerflächen (37, 38) verbunden ist, welche jeweils in Löserichtung entgegen Federkräften (40, 41) verschieblich gelagert sind. Die Steuerstange dient zur Druckmittelführung, wodurch die Druckmittelanschlüsse (47, 48) gegenüberliegend zusammen mit der Handbetätigung (20) zur Lösung der Verriegelung am einen Zylinderende (17) angeordnet werden können.

Figure imgb0001
The pressure medium-operated detent cylinder (1) has a working piston (3) with two ring projections (8 and 9) for receiving ball ratchets (12, 12 '; 13, 13'), which are used to latch the piston (3) in its two end positions between radial engage opposite abutment surfaces (35, 37; 36, 38), of which the radially outer abutment surfaces (35, 36) are fixed to the housing and the radially inner abutment surfaces (37, 38) are mounted on a hollow control rod, which is connected to a control piston (21) for monitoring the position of the radially inner abutment surfaces (37, 38), which are each slidably mounted in the release direction against spring forces (40, 41). The control rod serves to guide the pressure medium, as a result of which the pressure medium connections (47, 48) can be arranged opposite one another together with the manual actuation (20) to release the locking at one cylinder end (17).
Figure imgb0001

BezugszeichenlisteReference symbol list

  • 1 Rastierungszylinder1 locking cylinder
  • 2 Zylindergehäuse2 cylinder housings
  • 3 . Arbeitskolben3rd Working piston
  • 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. lo' Bohrungen im Ringansatz 810 u. lo 'holes in the ring approach 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 Druckmittelanschlüsse47 u. 48 pressure medium connections
  • 49 u. 50 Bohrungen in der Steuerstange 1449 u. 50 holes in the control rod 14

Claims (12)

1. Druckmittelbetätigter Rastierungszylinder zur Betätigung wenigstens eines Abdeckorganes, insbesondere Be- oder Entlüftungsjalousie, - mit einem zwischen zwei Endlagen verschieblichen, beidseitig beaufschlagbaren Arbeitskolben und - mit einer Kugelgesperre umfassenden Vorrichtung zur mechanischen Verriegelung des Arbeitskolbens in seinen beiden Endlagen und zur druckmittelgesteuerten Entriegelung des Arbeitskolbens und seiner anschließenden Verschiebung aus seiner einen Endlage in die andere oder umgekehrt,
dadurch gekennzeichnet,
daß am Arbeitskolben beidseitig je ein aus mehreren über dem Umfang gleichmäßig verteilten Kugeln bestehendes Kugelgesperre gehalten ist, - daß die beiden Endlagen des Arbeitskolbens durch zylindergehäusefeste äußere Sperringe bestimmt sind, die zur Verriegelung der Kugeln eines Kugelgesperres in einer Endlage des Kolbens kugelseitig radial äußere Widerlagerflächen aufweisen,
daß eine von einem Steuerkolben zwischen zwei Anschlägen bewegliche zentrale Steuerstange vorgesehen ist, die durch den Arbeitskolben druckmitteldicht geführt ist, - daß auf der Steuerstange gegenüber den äußeren Sperringen innere Sperringe angeordnet sind, die jeweils zur Verriegelung der Kugeln eines Kugelgesperres in einer Endlage des Kolbens kugelseitig radial innere Widerlagerflächen aufweisen, wobei die inneren Sperringe auf der Steuerstange in einem festen Mindestabstand voneinander gehalten sind. 1. Pressure medium-actuated detent cylinder for actuating at least one covering element, in particular a ventilation blind, - With a working piston which can be moved between two end positions and can be loaded on both sides with a ball ratchet device for mechanical locking of the working piston in its two end positions and for pressure-controlled unlocking of the working piston and its subsequent displacement from one end position to the other or vice versa,
characterized,
that a ball ratchet consisting of several balls evenly distributed over the circumference is held on both sides of the working piston, that the two end positions of the working piston are determined by outer locking rings fixed to the cylinder housing, which have radial outer abutment surfaces on the ball side for locking the balls of a ball lock in an end position of the piston,
that a central control rod which is movable by a control piston between two stops is provided and is guided through the working piston in a pressure-tight manner, - That inner locking rings are arranged on the control rod opposite the outer locking rings, each for locking the Balls of a ball lock in an end position of the piston have radially inner abutment surfaces on the ball side, the inner locking rings on the control rod being held at a fixed minimum distance from one another. 2. Zylinder nach Anspruch 1, dadurch gekennzeichnet, daß die inneren Sperringe zum Eintritt der Kugelgesperre in ihre Sperrstellungen zwischen den äußeren und inneren Widerlagerflächen jeweils in entgegengesetzten Richtungen auf der Steuerstange entgegen Federkräften verschieblich gelagert sind.2. Cylinder according to claim 1, characterized in that the inner locking rings for the entry of the ball lock in their locking positions between the outer and inner abutment surfaces are each slidably mounted in opposite directions on the control rod against spring forces. 3. Zylinder nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der eine Druckmittelanschluß über die hohle ausgebildete Steuerstange des Steuerkolbens an den einen Arbeitszylinderraum zur einen Seite des Arbeitskolbens und der andere Druckmittelanschluß an den anderen Arbeitszylinderraum zur anderen Seite des Arbeitskolbens angeschlossen ist.3. Cylinder according to claim 1 or 2, characterized in that the pressure medium connection is connected via the hollow control rod of the control piston to the one working cylinder space on one side of the working piston and the other pressure medium connection to the other working cylinder space on the other side of the working piston. 4. Zylinder nach Anspruch 3, dadurch gekennzeichnet, daß der eine Druckmittelanschluß zusätzlich an den einen Steuerzylinderraum zur einen Seite des Steuerkolbens und der andere Druckmittelanschluß an den anderen Steuerzylinderraum zur anderen Seite des Steuerkolbens angeschlossen ist, wobei der andere Steuerzylinderraum mit dem anderen Arbeitszylinderraum verbunden ist.4. Cylinder according to claim 3, characterized in that a pressure medium connection is additionally connected to a control cylinder chamber on one side of the control piston and the other pressure medium connection to the other control cylinder chamber on the other side of the control piston, the other control cylinder chamber being connected to the other working cylinder chamber . 5. Zylinder nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß beide Druckmittelanschlüsse am einen Ende des Zylindergehäuses angeordnet sind.5. Cylinder according to claim 3 or 4, characterized in that both pressure medium connections are arranged at one end of the cylinder housing. 6. Zylinder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die druckmitteldicht durch den Boden des Zylindergehäuses geführte Steuerstange mit einer Handbetätigung versehen ist.6. Cylinder according to one of the preceding claims, characterized in that the fluid-tight control rod guided through the bottom of the cylinder housing is provided with a manual actuation. 7. Zylinder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Steuerstange mit einer mechanischen Rüttelsicherung im Zylinderboden oder innerhalb der hohlen Kolbenstange des Arbeitskolbens versehen ist.7. Cylinder according to one of the preceding claims, characterized in that the control rod is provided with a mechanical anti-vibration device in the cylinder base or within the hollow piston rod of the working piston. 8. Zylinder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Kugelgesperre jeweils aus mindestens einer oder mehreren, vorzugsweise drei über dem Kreisumfang gleichmäßig verteilter Kugeln besteht.8. Cylinder according to one of the preceding claims, characterized in that the ball ratchet consists of at least one or more, preferably three balls evenly distributed over the circumference. 9. Zylinder nach Anspruch 8, dadurch gekennzeichnet, daß der Arbeitskolben beidseitig zylindrische Ringansätze aufweist, die jeweils als Kugelkäfig für die Kugeln eines Kugelgesperres ausgebildet sind.9. Cylinder according to claim 8, characterized in that the working piston has cylindrical lugs on both sides, which are each designed as a ball cage for the balls of a ball ratchet. 10. Zylinder nach Anspruch 9, dadurch gekennzeichnet, daß die Ringansätze jeweils entsprechend der Anzahl der Kugeln eines Kugelgesperres radiale Bohrungen aufweisen, in denen die Kugeln gehalten sind.10. Cylinder according to claim 9, characterized in that the ring projections each have radial bores in which the balls are held in accordance with the number of balls of a ball ratchet. 11. Zylinder nach Anspruch 10, dadurch gekennzeichnet, daß die Bohrungen zur Verhinderung eines Austrittes der Kugeln aus den Ringansätzen nach außen am Außenumfang der Ringansätze verengt sind, während die Kugeln innerhalb der Bohrungen und außerhalb der Rastierungen in den Endlagen des Arbeitskolbens sich auf der äußeren Umfangsfläche der Steuerstange abstützen.11. Cylinder according to claim 10, characterized in that the bores for preventing the balls from escaping from the ring attachments are narrowed outwards on the outer circumference of the ring attachments, while the balls inside the bores and outside the detents in the end positions of the working piston are on the outer Support the circumferential surface of the control rod. 12. Zylinder nach Anspruch 5 und 6, dadurch gekennzeichnet, daß die beiden Druckmittelanschlüsse am Zylinderdeckel gegenüberliegend angeordnet sind und daß die Handbetätigung zur Entriegelung des drucklosen Zylinders zentral am Zylinderdeckel angeordnet ist.12. Cylinder according to claim 5 and 6, characterized in that the two pressure medium connections on the cylinder cover are arranged opposite each other and that the manual operation for unlocking the depressurized cylinder is arranged centrally on the cylinder cover.
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 true EP0170873A1 (en) 1986-02-12
EP0170873B1 EP0170873B1 (en) 1987-09-16

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

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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
EP0692640A2 (en) * 1994-06-14 1996-01-17 V. Kann Rasmussen Industri A/S A pressure medium controlled operator device for opening and closing a roof window or a hatch
CN103486108A (en) * 2013-10-17 2014-01-01 济南夫驰科技有限公司 Air cylinder with dual-self-locking structure
CN104763706A (en) * 2015-04-02 2015-07-08 中船重工中南装备有限责任公司 Mechanical self-locking hydraulic cylinder
EP3109487A1 (en) * 2015-06-26 2016-12-28 SPP Canada Aircraft, Inc. Dual locking hydraulic actuator for structural brace
US9944385B2 (en) 2015-06-26 2018-04-17 Spp Canada Aircraft, Inc. Dual locking hydraulic actuator for structural brace
CN108590996A (en) * 2018-04-13 2018-09-28 台州动林汽车空调压缩机有限公司 Compressor of air conditioner
CN116857254A (en) * 2023-09-01 2023-10-10 常州亿麟电气科技有限公司 Electric hydraulic system

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WO2005054686A1 (en) * 2003-12-04 2005-06-16 Razorback Vehicles Corporation Limited A pneumatic or hydraulic cylinder lock assembly
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

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US2887991A (en) * 1954-03-29 1959-05-26 Haskel Engineering Associates Fluid actuator with locking means
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DE1426552A1 (en) * 1963-05-04 1968-11-21 Plessey Uk Ltd Automatic locking device for working piston

Cited By (12)

* 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
EP0692640A2 (en) * 1994-06-14 1996-01-17 V. Kann Rasmussen Industri A/S A pressure medium controlled operator device for opening and closing a roof window or a hatch
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
CN103486108A (en) * 2013-10-17 2014-01-01 济南夫驰科技有限公司 Air cylinder with dual-self-locking structure
CN104763706A (en) * 2015-04-02 2015-07-08 中船重工中南装备有限责任公司 Mechanical self-locking hydraulic cylinder
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
EP3109487A1 (en) * 2015-06-26 2016-12-28 SPP Canada Aircraft, Inc. Dual locking hydraulic actuator for structural brace
US9944385B2 (en) 2015-06-26 2018-04-17 Spp Canada Aircraft, Inc. Dual locking hydraulic actuator for structural brace
CN108590996A (en) * 2018-04-13 2018-09-28 台州动林汽车空调压缩机有限公司 Compressor of air conditioner
CN116857254A (en) * 2023-09-01 2023-10-10 常州亿麟电气科技有限公司 Electric hydraulic system
CN116857254B (en) * 2023-09-01 2023-12-15 常州亿麟电气科技有限公司 Electric hydraulic system

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DE3560649D1 (en) 1987-10-22
EP0170873B1 (en) 1987-09-16
DE3428228A1 (en) 1986-02-13

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