EP0489306B1 - Piston-cylinder combination for generating and transmitting pressure forces - Google Patents
Piston-cylinder combination for generating and transmitting pressure forces Download PDFInfo
- Publication number
- EP0489306B1 EP0489306B1 EP91119809A EP91119809A EP0489306B1 EP 0489306 B1 EP0489306 B1 EP 0489306B1 EP 91119809 A EP91119809 A EP 91119809A EP 91119809 A EP91119809 A EP 91119809A EP 0489306 B1 EP0489306 B1 EP 0489306B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- skirt
- cylinder unit
- pressure
- sealing ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
- B21B31/32—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis by liquid pressure, e.g. hydromechanical adjusting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/16—Adjusting or positioning rolls
- B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
- B21B31/203—Balancing rolls
Definitions
- the invention relates to a piston-cylinder unit for the generation and transmission of pressure forces on linearly displaceably guided actuating elements with a pressure tappet, which is pivoted transversely to the pressure direction in a pot piston that is open on one side.
- Piston-cylinder units of this type are used, in particular in heavy engineering, to apply a controllable pressure to flat stop surfaces of actuating elements which can be displaced in sliding guides, or to counteract a pressure on these elements.
- the pressure tappets of the piston-cylinder units act on the respective contact surface of the control element without being coupled to it.
- Piston-cylinder units of this type are arranged between the bearing chocks of roll stands with one or more pairs of rolls in order to support the bearing chocks of a pair of rolls against one another under pressure control or else to apply pressure, e.g. apply a bending pressure to partially deform the rollers on their ends.
- the pendulum mounting of the pressure tappet in the pot piston of the generic piston-cylinder units takes into account the fact that the pressure tappet Actuated actuators often perform more or less strong movements transversely to the pressure direction in practical operation, which are due, for example, to inevitable tolerances in the sliding guides of the actuators.
- the pressure tappet absorbs the short transverse movements without changing the pressure contact between the pressure tappet and the contact surface of the actuating elements with a pendulum movement in the pot piston.
- the pressure tappet with its spherically shaped lower end face stands on a spherical cap arranged in the base part of the pot piston.
- the possible pendulum deflection angle of the pressure tappet is narrowly limited by the inner wall of the pot piston, into which it is inserted with a slight play, and an annular seal applied to the pressure tappet near the edge of the pot piston, in order to ensure that the pressure tappet after the pressure transfer to the Control elements returns to the original centering position within the pot piston and is not in an inclined position when a new loading movement begins.
- this form of training of the piston-cylinder unit is not suitable for absorbing larger transverse movement deflections of the adjusting elements, as can be caused, for example, by sliding guides of the adjusting elements knocked out in continuous operation, and that the pendulum deflections only increase with a slight increase Ring seals are pushed beyond their elastic limit and damaged as a result.
- the invention has for its object to improve the generic piston-cylinder units so that significantly larger pendulum deflections of the pressure tappet are made possible without damage to the seal occurring and the pressure tappet continues to be returned to its centering position after completion of the pressure transmission.
- This form of training allows the pressure tappet to be dimensioned such that it is able to exercise considerably larger pendulum deflections within the pot piston, and that when the pressure transfer to the actuating elements of the pressure tappet is ended, the spring elements move it back into the starting centering position.
- the sealing lugs can consist of conical surfaces arranged in the inner wall of the pot piston and on the outer circumference of the pressure tappet, which run in the pot piston on a conical ring which can be inserted and axially fixed therein and on the pressure tappet in a neck-shaped ring incision.
- the pressure plunger 1 stands with its spherical lower end face 1 a on a spherical cap 2 a, which is part of a floating piston 2.
- This floating piston 2 is guided in the pot piston 3, which consists of the piston part 3a and the pot extension 3b.
- the piston part 3a of the pot piston 3 is guided in the cylinder 4, which has a pressure medium supply opening 4a below the piston part 3a and is closed by the piston cover 5.
- the floating piston 2 On the end facing away from the spherical cap 2a, the floating piston 2 has a guide pin 6, which is enclosed by a spring assembly 7, which is arranged in a bottom recess 3c of the piston part 3a.
- the guide pin 6 is used only for centering the plate springs.
- the pressure tappet 1 has a neck-shaped ring cutout 1b with a conical surface 1c, which in the illustrated position of the pressure tappet 1 rests on the conical surface of the conical ring 8.
- the plunger 1 is in this position in its starting position with respect to the adjusting element indicated by 14 and its slightly curved pressure face 1d is at a distance from its flat stop surface 14a.
- the Pressure plunger 1 held under the pressure of the spring assembly 7 by the conical surfaces of the conical ring 8 in the centering position and axially locked.
- the pot piston 3 moves upward in the direction of the arrow A when a pressure medium is supplied through the pressure medium supply opening 4a and takes the pressure tappet 1 with it, without this, or the floating piston 2, its relative position to the pot piston 3 changes.
- a two-part sealing ring sleeve 10 is arranged above the conical ring 8 in the opening area of the pot extension 3b of the pot piston 3.
- This sealing ring sleeve 10 consists of a lower groove ring 10a, which rests on the conical ring 8 or a locking ring 15 inserted above it, and a sealing ring 10b guided in the groove thereof.
- An elastic intermediate ring 11 is inserted into the groove between the two rings 10a and 10b.
- the head 1e of the pressure tappet 1 comprises a counter-sealing ring 12, which is likewise formed from two rings 12a and 12b which are separated from one another by an elastic intermediate ring 13.
- the diameter of this counter-sealing ring 12 is substantially larger than that of the sealing ring 10b of the sealing ring sleeve 10.
- the lower one lies Ring 12b of the counter-sealing ring 12 with a flat radial plate surface facing downward on the upper ring face of the sealing ring 10b of the sealing ring sleeve 10 and thus covers the upper opening of the cup piston 3 in a sealing manner.
- the pot piston is secured in this way in every position of the pressure ram 1 against the ingress of dirt.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Eye Examination Apparatus (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Kolben-Zylinder-Aggregat zur Erzeugung und Übertragung von Druckkräften auf geradlinig verschiebbar geführte Stellelemente mit einem, in einem einseitig offenen Topfkolben, quer zur Druckrichtung pendelbar gelagerten Druckstößel.The invention relates to a piston-cylinder unit for the generation and transmission of pressure forces on linearly displaceably guided actuating elements with a pressure tappet, which is pivoted transversely to the pressure direction in a pot piston that is open on one side.
Kolben-Zylinder-Aggregate dieser Art werden, insb. im Schwermaschinenbau dazu verwendet, auf ebene Anschlagflächen von in Gleitführungen verschiebbaren Stellelementen einen steuerbaren Druck aufzubringen oder einem auf diesen Elementen lastenden Druck entlastend entgegenzuwirken. Die Druckstößel der Kolben-Zylinder-Aggregate beaufschlagen dabei die jeweilige Anlagefläche des Stellelementes, ohne mit diesem gekuppelt zu sein. So werden z.B. Kolben-Zylinder-Aggregate dieser Art zwischen den Lagereinbaustücken von Walzgerüsten mit einem oder mehreren Walzenpaaren angeordnet, um die Lagereinbaustücke eines Walzenpaares, druckgesteuert gegeneinander abzustützen oder auch einen Druck, z.B. einen Biegedruck, zur partiellen Verformung der Walzen auf deren Enden aufzubringen.Piston-cylinder units of this type are used, in particular in heavy engineering, to apply a controllable pressure to flat stop surfaces of actuating elements which can be displaced in sliding guides, or to counteract a pressure on these elements. The pressure tappets of the piston-cylinder units act on the respective contact surface of the control element without being coupled to it. For example, Piston-cylinder units of this type are arranged between the bearing chocks of roll stands with one or more pairs of rolls in order to support the bearing chocks of a pair of rolls against one another under pressure control or else to apply pressure, e.g. apply a bending pressure to partially deform the rollers on their ends.
Die pendelbare Lagerung der Druckstößel im Topfkolben der gattungsgemäßen Kolben-Zylinder-Aggregate trägt dabei dem Umstand Rechnung, daß die von dem Druckstößel beaufschlagten Stellelemente im praktischen Betrieb häufig auch mehr oder weniger starke Bewegungen quer zur Druckrichtung ausführen, die z.B. auf unvermeidliche Toleranzen in den Gleitführungen der Stellelemente zurückzuführen sind. Der Druckstößel nimmt dabei die kurzen Querbewegungen ohne Veränderung des Druckkontaktes zwischen Druckstößel und Anlagefläche der Stellelemente mit einer Pendelbewegung im Topfkolben auf.The pendulum mounting of the pressure tappet in the pot piston of the generic piston-cylinder units takes into account the fact that the pressure tappet Actuated actuators often perform more or less strong movements transversely to the pressure direction in practical operation, which are due, for example, to inevitable tolerances in the sliding guides of the actuators. The pressure tappet absorbs the short transverse movements without changing the pressure contact between the pressure tappet and the contact surface of the actuating elements with a pendulum movement in the pot piston.
Bei einer bekannten Ausbildungsform (vgl. DE-A 2804007) der gattungsgemäßen Kolben-Zylinder-Aggregate für die Druckbeaufschlagung von Lagereinbaustücken von Walzwerkswalzen steht der Druckstößel mit seiner ballig geformten unteren Stirnfläche auf einer im Bodenteil des Topfkolbens angeordneten Kugelkalotte auf. Der mögliche Pendelausschlagswinkel des Druckstößels wird dabei durch die Innenwandung des Topfkolbens, in den er mit leichtem Spiel eingesetzt ist, und eine, in der Nähe des Topfkolbenrandes auf dem Druckstössel aufgebrachte Ringdichtung eng begrenzt, um sicherzustellen, daß der Druckstößel nach Beendigung der Druckübertragung auf die Stellelemente wieder in die ursprüngliche Zentrierposition innerhalb des Topfkolbens zurückkehrt und sich nicht bei Beginn einer neuen Beaufschlagungsbewegung in einer Schrägstellung befindet.In a known embodiment (cf. DE-A 2804007) of the generic piston-cylinder units for pressurizing bearing chocks of rolling mill rollers, the pressure tappet with its spherically shaped lower end face stands on a spherical cap arranged in the base part of the pot piston. The possible pendulum deflection angle of the pressure tappet is narrowly limited by the inner wall of the pot piston, into which it is inserted with a slight play, and an annular seal applied to the pressure tappet near the edge of the pot piston, in order to ensure that the pressure tappet after the pressure transfer to the Control elements returns to the original centering position within the pot piston and is not in an inclined position when a new loading movement begins.
Es hat sich gezeigt, daß diese Ausbildungsform des Kolben-Zylinder-Aggregates nicht geeignet ist, größere Querbewegungsausschläge der Stellelemente, wie sie z.B. infolge von im Dauerbetrieb ausgeschlagenen Gleitführungen der Stellelemente verursacht werden können, aufzunehmen, und daß schon bei nur leichter Vergrößerung der Pendelausschläge die Ringdichtungen über ihre Elastizitätsgrenze hinaus überdrückt und dadurch beschädigt werden.It has been shown that this form of training of the piston-cylinder unit is not suitable for absorbing larger transverse movement deflections of the adjusting elements, as can be caused, for example, by sliding guides of the adjusting elements knocked out in continuous operation, and that the pendulum deflections only increase with a slight increase Ring seals are pushed beyond their elastic limit and damaged as a result.
Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäßen Kolben-Zylinder-Aggregate so zu verbessern, daß erheblich größere Pendelausschläge des Druckstößels möglich gemacht werden, ohne daß hierbei Beschädigungen der Abdichtung auftreten und der Druckstößel auch weiterhin nach Beendigung der Druckübertragung in seine Zentrierstellung zurückgeführt wird.The invention has for its object to improve the generic piston-cylinder units so that significantly larger pendulum deflections of the pressure tappet are made possible without damage to the seal occurring and the pressure tappet continues to be returned to its centering position after completion of the pressure transmission.
Diese Aufgabe wird dadurch gelöst, daß der Druckstößel aus einer, durch aufeinanderliegende Dichtansätze an der Außenwand des Druckstößels und am Innenrand des Topfkolbens bestimmten Zentrierposition entgegen der Wirkung eines am Boden des Topfkolbens angeordneten Federelementes in den Topfkolben hinein, gegen einen in diesem angeordneten Festanschlag in Pendelposition gleitverschiebbar ist.This object is achieved in that the pressure tappet from a centering position determined by superimposed sealing lugs on the outer wall of the pressure tappet and on the inner edge of the pot piston against the action of a spring element arranged on the bottom of the pot piston into the pot piston, against a fixed stop arranged therein in the pendulum position is slidable.
Diese Ausbildungsform erlaubt es, den Druckstößel so zu bemessen, daß dieser innerhalb des Topfkolbens erheblich größere Pendelausschläge auszuüben vermag, und daß bei Beendigung der Druckübertragung auf die Stellelemente der Druckstößel durch die Federelemente wieder in die Ausgangs-Zentrierposition zurückbewegt wird.This form of training allows the pressure tappet to be dimensioned such that it is able to exercise considerably larger pendulum deflections within the pot piston, and that when the pressure transfer to the actuating elements of the pressure tappet is ended, the spring elements move it back into the starting centering position.
Wie die Erfindung weiter vorsieht, können die Dichtansätze aus in der Innenwandung des Topfkolbens und auf dem Außenumfang des Druckstößels angeordneten Konusflächen bestehen, die im Topfkolben auf einem, in diesen einschiebbaren und axial festlegbaren Konus-Ring und am Druckstößel in einem halsförmigen Ringeinschnitt verlaufen.As the invention further provides, the sealing lugs can consist of conical surfaces arranged in the inner wall of the pot piston and on the outer circumference of the pressure tappet, which run in the pot piston on a conical ring which can be inserted and axially fixed therein and on the pressure tappet in a neck-shaped ring incision.
Weitere Ausbildungsformen der erfindungsgemäßen Kolben-Zylinder-Aggregate sind in zusätzlichen Unteransprüchen niedergelegt.Further forms of training of the piston-cylinder units according to the invention are laid down in additional subclaims.
Die Erfindung wird anhand des in der Zeichnung dargestellten Ausführungsbeispiels erläutert. In der Zeichnung zeigen
- Fig. 1 bis 4
- das Kolben-Zylinder-Aggregat im Axialschnitt in verschiedenen Arbeitsstellungen und
- Fig. 5
- eine andere Ausbildung des Kolben-Zylinder-Aggregats nach den Fig. 1 b is 4.
- 1 to 4
- the piston-cylinder unit in axial section in various working positions and
- Fig. 5
- another embodiment of the piston-cylinder unit according to FIGS. 1 b to 4.
Wie aus Fig. 1 zu ersehen, steht der Druckstößel 1 mit seiner balligen unteren Stirnfläche 1a auf einer Kugelkalotte 2a auf, die Teil eines schwimmenden Kolbens 2 ist. Dieser schwimmende Kolben 2 ist in dem Topfkolben 3 geführt, der aus dem Kolbenteil 3a und dem Topfansatz 3b besteht. Der Kolbenteil 3a des Topfkolbens 3 ist im Zylinder 4 geführt, der unterhalb des Kolbenteils 3a eine Druckmittelzuführöffnung 4a aufweist und durch den Kolbendeckel 5 verschlossen ist. An der der Kugelkalotte 2a abgewandten Stirnseite weist der schwimmende Kolben 2 einen Führungsstift 6 auf, der von einem Federpaket 7 umschlossen wird, das in einer Bodenausnehmung 3c des Kolbenteils 3a angeordnet ist. Der Führungsstift 6 dient nur zur Zentrierung der Tellerfedern. Im oberen Bereich des Topfansatzes 3b des Topfkolbens 3 ist in diesen ein mit einem Sicherungsring 9 axial gegen Verschieben gesicherter Konusring 8 eingesetzt. Der Druckstößel 1 weist einen halsförmigen Ringausschnitt 1b mit einer Konusfläche 1c auf, die in der dargestellten Position des Druckstößels 1 auf der Konusfläche des Konusrings 8 aufliegt. Der Druckstößel 1 befindet sich in dieser Position in seiner Ausgangsstellung gegenüber dem mit 14 angedeuteten Stellelement und seine leicht gewölbte Druckstirn 1d befindet sich mit Abstand gegenüber dessen ebener Anschlagfläche 14a. Wie ersichtlich, wird der Druckstößel 1 unter dem Druck des Federpaketes 7 durch die Konusflächen des Konusrings 8 in Zentrierposition gehalten und axial arretiert.As can be seen from FIG. 1, the
Wie aus Fig. 2 zu ersehen, bewegt sich der Topfkolben 3 bei Zuführung eines Druckmittels durch die Druckmittelzuführöffnung 4a in Richtung des eingezeichneten Pfeils A nach oben und nimmt dabei den Druckstößel 1 mit, ohne daß dieser, bzw. der schwimmende Kolben 2 seine relative Lage zu dem Topfkolben 3 ändert.As can be seen from FIG. 2, the
Mit Auftreffen der gewölbten Druckstirn 1d des Druckstößels 1 auf die Anschlagfläche 14a des Stellelements 14 wird der Druckstößel 1, wie im linken Teil der Darstellung nach Fig. 3 wiedergegeben, gegen die Wirkung des Federpaketes 7 in Richtung des Pfeils B zusammen mit dem schwimmenden Kolben 2 in den Topfkolben 3 hineinbewegt, bis der schwimmende Kolben 2 auf dem Boden des Topfkolbens 3 aufliegt. Dabei löst sich die Konusfläche 1c des halsförmigen Ringausschnittes 1b von der Konusfläche des Konusrings 8 und hebt damit die Festlegung des Druckstößels 1 in dessen Zentrierstellung gemäß Fig. 1 auf. Der Druckstößel 1 kann jetzt in dieser freien Stellung weiter in Richtung des Pfeils A gegen die Anschlagfläche 14a des Stellelements 14 bewegt werden, wobei sich seine relative Lage zum Topfkolben 3 nicht mehr ändert, wie dies aus der Darstellung rechts in Fig. 3 hervorgeht.When the
Ergeben sich während der Druckkraftübertragung auf das Stellelement 9 nach beiden Darstellungen in Fig. 3 Querbewegungen des Stellelements 14, dann kann der Druckstößel 1, wie in Fig. 4 dargestellt, solche Bewegungen durch Pendeln in der Kugelkalotte 2a des schwimmenden Kolbens 2 innerhalb des in strichpunktierten Linien angedeuteten Winkels frei beweglich in dem Topfkolben 2 aufnehmen. Nach Beendigung der Druckübertragung durch Umsteuerung der Druckmittelbeaufschlagung des Kolbenteils 3a über den Zylinderringraum 4b auf nicht dargestellte Weise, bewegt sich der Topfkolben 3 entgegen der Richtung des Pfeils A wieder in die in Fig. 1 dargestellte Position, wobei der Druckstößel 1 unter der Wirkung des Federpaketes 7 wieder in die durch die Konusfläche 1c und den Konusring 8 bestimmte Zentrierposition gedrückt wird.If there are transverse movements of the actuating
Bei der Ausbildungsform nach Fig. 5 ist im Öffnungsbereich des Topfansatzes 3b des Topfkolbens 3 eine zweiteilige Dichtringhülse 10 oberhalb des Konusrings 8 angeordnet. Diese Dichtringhülse 10 besteht aus einem unteren Nutring 10a, der auf dem Konusring 8 bzw. einem über diesem eingesetzten Sicherungsring 15 aufliegt, und aus einem in dessen Nut geführten Dichtring 10b. Zwischen beide Ringe 10a und 10b ist in die Nut ein elastischer Zwischenring 11 eingesetzt. Den Kopf 1e des Druckstößels 1 umfaßt ein Gegendichtring 12, der ebenfalls aus zwei, durch einen elastischen Zwischenring 13 voneinander getrennten Ringen 12a und 12b gebildet wird. Der Durchmesser dieses Gegendichtungsrings 12 ist, wie ersichtlich, wesentlich größer als der des Dichtungsrings 10b der Dichtringhülse 10. In der rechts in der Zeichnung dargestellten Ausgangsposition des Druckstößels 1, bei der dieser mit der Konusfläche des Ringausschnitts 1b am Dichtungsring 8 anliegt, liegt der untere Ring 12b des Gegendichtungsrings 12 mit einer nach unten weisenden ebenen radialen Tellerfläche auf der oberen Ringstirn des Dichtungsrings 10b der Dichtringhülse 10 auf und deckt damit die obere Öffnung des Topfkolbens 3 dichtend ab. Der Topfkolben ist auf diese Weise in jeder Stellung des Druckstößels 1 gegen das Eindringen von Verschmutzung gesichert.5, a two-part
Claims (6)
- Piston cylinder unit for the generation and transmission of pressure forces to setting elements (14) guided to be rectilinearly displaceable, with a skirt piston (3), which is open at one end and in which a piston ram (1), which projects out of the skirt piston opening by its end acting on the setting element (14) and is sealed off and supported against the inner wall of the skirt piston opening by ring elements and which is supported by its other, spherically-shaped end (1a) against the skirt piston base by a spherical guide seat, is borne inclined to the pressure direction to be pendulating, characterised thereby that the spherical guide seat (2a) is constructed as a piston member (2) which is guided in the skirt piston (3) to be displaceable and is supported against the skirt piston base by a spring (7), and the ring elements consist of cone surfaces (8a and 1c), which are arranged in the inner wall of the skirt piston opening and on the outer circumference of the piston ram (1), respectively, and which can be brought into a mutually loading setting by the pressure of the spring (7) and thus bring the piston ram (1) into and retain it in a centred setting.
- Piston-cylinder unit according to claim 1, characterised thereby that the cone surfaces (8a) in the skirt piston (3) extend on a cone ring (8) pushable into this and axially fixable therein and the cone surfaces (1c) of the piston ram (1) extend in a neck-shaped annular recess (1b).
- Piston-cylinder unit according to claim 1, characterised by a guide pin (6) which is surrounded by the spring (7), is attached to the end face of the piston member (2) and projects into a depression (3d) in the base of the skirt piston (3).
- Piston-cylinder unit according to one or more of claims 1 to 3, characterised by sealing rings (12) and sealing ring sleeves (10) which are arranged additionally to the cone surfaces (8a and 1c) at the end (1e) of the piston ram (1) acting on the setting element (14) and in the skirt piston opening, respectively, surround the end (1e) and fit in the opening, respectively, and are resiliently displaceable and pressable against one another.
- Piston-cylinder unit according to claim 4, characterised thereby that sealing ring (12) and sealing ring sleeve (10) each consist of a pair of rings (10a, 10b or 12a, 12b), between which are arranged resilient intermediate rings (13 or 11).
- Piston-cylinder unit according to claims 4 and/or 5, characterised thereby, that the contact surfaces of the sealing ring (12) arranged at the end (1e) of the piston ram (1) is constructed as a flat plate and the bearing surface of the sealing ring sleeve (10) arranged in the skirt piston (3) is constructed as an annular disc, wherein the diameter of the plate is dimensioned to be substantially larger than the annular disc.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT91119809T ATE103211T1 (en) | 1990-12-06 | 1991-11-21 | PISTON-CYLINDER UNIT FOR GENERATION AND TRANSMISSION OF PRESSURE FORCES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4038950 | 1990-12-06 | ||
DE4038950A DE4038950A1 (en) | 1990-12-06 | 1990-12-06 | PISTON CYLINDER UNIT FOR THE PRODUCTION AND TRANSMISSION OF PRESSURE FORCES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0489306A1 EP0489306A1 (en) | 1992-06-10 |
EP0489306B1 true EP0489306B1 (en) | 1994-03-23 |
Family
ID=6419735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91119809A Expired - Lifetime EP0489306B1 (en) | 1990-12-06 | 1991-11-21 | Piston-cylinder combination for generating and transmitting pressure forces |
Country Status (8)
Country | Link |
---|---|
US (1) | US5301598A (en) |
EP (1) | EP0489306B1 (en) |
KR (1) | KR920012764A (en) |
CN (1) | CN1028894C (en) |
AT (1) | ATE103211T1 (en) |
DE (2) | DE4038950A1 (en) |
ES (1) | ES2051555T3 (en) |
RU (1) | RU2047010C1 (en) |
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US6164188A (en) * | 1998-11-23 | 2000-12-26 | Miser; H T | Reciprocating pump/compressor with self-aligning piston |
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CN102913506B (en) * | 2012-11-09 | 2015-12-09 | 浙江大学 | A kind of ball strand is built in piston rod type oil hydraulic cylinder |
US10107314B2 (en) | 2013-04-12 | 2018-10-23 | Spx Flow, Inc. | Cylinder having a floating piston, low profile swivel cap, and lubricated rod |
US9856892B2 (en) | 2013-04-12 | 2018-01-02 | Spx Flow, Inc. | Cylinder having a floating piston, swivel cap, and lubricated rod |
PL2984351T3 (en) * | 2013-04-12 | 2021-04-06 | Spx Flow, Inc. | Actuator with swivel cap |
EP2824359B1 (en) | 2013-07-08 | 2015-07-01 | Bordignon Silvano S.r.l. | Compensator for unbalanced compression forces for press machines |
US10100928B2 (en) | 2014-07-22 | 2018-10-16 | Spx Flow, Inc. | Floating piston |
CN105805083A (en) * | 2016-05-16 | 2016-07-27 | 南京晨光集团有限责任公司 | Integrally-designed actuator execution mechanism with spherical hinges internally arranged in piston rod |
CN107781255B (en) * | 2017-10-11 | 2019-11-15 | 中国航发西安动力控制科技有限公司 | A kind of resilient push structure |
US10954974B2 (en) * | 2017-10-20 | 2021-03-23 | Hamilton Sunstrand Corporation | Actuator assembly with lost motion device |
US20230213058A1 (en) * | 2022-01-05 | 2023-07-06 | Jeffery L. Johnson | Joint for connecting an attachment to a hydraulic ram |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1057666A (en) * | 1952-08-20 | 1954-03-10 | Stabeg Appbau Gmbh | Brake cylinder |
DE955132C (en) * | 1954-02-03 | 1956-12-27 | Moeller & Neumann Gmbh | Device for pressing the work rolls on roll stands |
GB1029134A (en) * | 1962-07-10 | 1966-05-11 | Automotive Prod Co Ltd | Improvements in and relating to fluid pressure operated servo-devices |
US3352143A (en) * | 1965-04-02 | 1967-11-14 | Leo C Bollar | Impact apparatus |
DE1527642A1 (en) * | 1966-01-26 | 1970-04-09 | Hoestemberghe & Kluetsch Gmbh | Hydraulic adjusting device to keep the roll gap constant in roll stands, especially in block and slab rolling mills |
US3878769A (en) * | 1973-06-07 | 1975-04-22 | Cascade Corp | Load clamping mechanism with limited play in arms |
DE2650529A1 (en) * | 1976-11-04 | 1978-05-18 | Bosch Gmbh Robert | Emergency spring brake cylinder - has shoulder for brake rod formed directly in hollow piston rod by compression |
DE2804007A1 (en) * | 1978-01-31 | 1979-08-02 | Schloemann Siemag Ag | Balancing device for polling mill - with swivelling support pin to prevent premature leakage |
DE2818410A1 (en) * | 1978-04-27 | 1979-11-08 | Bosch Gmbh Robert | SPRING BRAKE CYLINDER |
GB8528848D0 (en) * | 1985-11-22 | 1985-12-24 | Davy Mckee Poole | Rolling mills |
-
1990
- 1990-12-06 DE DE4038950A patent/DE4038950A1/en not_active Withdrawn
-
1991
- 1991-11-21 AT AT91119809T patent/ATE103211T1/en not_active IP Right Cessation
- 1991-11-21 EP EP91119809A patent/EP0489306B1/en not_active Expired - Lifetime
- 1991-11-21 ES ES91119809T patent/ES2051555T3/en not_active Expired - Lifetime
- 1991-11-21 DE DE91119809T patent/DE59101237D1/en not_active Expired - Fee Related
- 1991-12-03 US US07/802,129 patent/US5301598A/en not_active Expired - Fee Related
- 1991-12-05 RU SU915010182A patent/RU2047010C1/en active
- 1991-12-06 CN CN91111460A patent/CN1028894C/en not_active Expired - Fee Related
- 1991-12-06 KR KR1019910022331A patent/KR920012764A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
ES2051555T3 (en) | 1994-06-16 |
EP0489306A1 (en) | 1992-06-10 |
ATE103211T1 (en) | 1994-04-15 |
RU2047010C1 (en) | 1995-10-27 |
DE59101237D1 (en) | 1994-04-28 |
CN1062021A (en) | 1992-06-17 |
US5301598A (en) | 1994-04-12 |
CN1028894C (en) | 1995-06-14 |
KR920012764A (en) | 1992-07-27 |
DE4038950A1 (en) | 1992-06-11 |
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