EP0397294B1 - Drive mechanism for a vacuum interrupter with a contact spring - Google Patents

Drive mechanism for a vacuum interrupter with a contact spring Download PDF

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Publication number
EP0397294B1
EP0397294B1 EP90250112A EP90250112A EP0397294B1 EP 0397294 B1 EP0397294 B1 EP 0397294B1 EP 90250112 A EP90250112 A EP 90250112A EP 90250112 A EP90250112 A EP 90250112A EP 0397294 B1 EP0397294 B1 EP 0397294B1
Authority
EP
European Patent Office
Prior art keywords
lever
spring
armed lever
drive
drive device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90250112A
Other languages
German (de)
French (fr)
Other versions
EP0397294A2 (en
EP0397294A3 (en
Inventor
Dietrich Rudolph
Norbert Steinemer
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Siemens AG
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Siemens AG
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Publication date
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Publication of EP0397294A2 publication Critical patent/EP0397294A2/en
Publication of EP0397294A3 publication Critical patent/EP0397294A3/en
Application granted granted Critical
Publication of EP0397294B1 publication Critical patent/EP0397294B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H2033/6667—Details concerning lever type driving rod arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/18944—Link connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/206—Adjustable

Definitions

  • the invention relates to a drive device for switching a vacuum interrupter on and off with a pivotably mounted two-armed lever which transmits a drive force and a spring which acts on the lever and provides the contact force.
  • a drive device of this type is known from EP-B-0 159 960.
  • the invention has for its object to provide a drive device which also consists of as few parts as possible, but which, in contrast to the known drive device, is particularly suitable for actuation by a drive force acting approximately parallel to the longitudinal axis of the vacuum interrupter, and which is easily different strong spring force can be performed.
  • the spring is supported at one end on a stationary abutment and that the lever in its bearing is guided to a limited extent in an approximately parallel to the direction of actuation of the switching tube.
  • the bearing which can expediently be designed as an elongated hole, allows the lever to be pivoted about its articulated connection with the drive plunger of the switching tube. This process occurs when switching on, when the two-armed lever is pivoted until it touches the contact pieces and is then lifted off the bearing by the driving force against the force of the contact force spring and moved in the guide. When switching off, the lever is first pivoted in its bearing until the contact pieces come into contact with each other and the previously specified ones Movements occur.
  • An essential property of the drive device is that it can be adapted to different paths and forces within wide limits.
  • the introduction of the driving force to one end region of the lever and the coupling of the movable plunger of the vacuum interrupter to the other end region of the lever can take place while the spring acts between the pivot bearing and the drive-side end region of the two-armed lever.
  • the spring is arranged to engage one end region of the lever and the pivot bearing of the lever is located between the point of application of the spring and the articulation of the movable plunger of the switching tube on the lever. In both embodiments, there are different lever lengths for the translation from the contact force spring to the contact pieces.
  • a tilt-free attack of the actuating and driving forces can be achieved in that the two-armed lever is formed from two brackets arranged parallel to one another, the distance between which corresponds at least to the diameter of the spring.
  • the spring can then be hung, for example, on a pin or bolt passing through the tabs or partial levers.
  • the lever and the spring can be mounted or arranged in a stationary frame, the side walls of which are arranged at least around the diameter of the spring from the tabs of the lever.
  • a spring or additionally the spring of the basic arrangement can be provided instead of the one spring located between the tabs of the lever in the spaces between the side walls of the frame and the tabs of the lever. This means that three different forces are available regardless of the type of spring provided.
  • a bolt passing through the lever or its parallel tabs and a bolt supported parallel to it in the side walls of the frame can be provided with notches as positional securing means for the optionally provided springs. This ensures that the spring forces act symmetrically on the lever.
  • FIG. 1 and 2 show schematically a basic embodiment of the invention.
  • a vacuum interrupter is shown in FIG. 1 with closed contact pieces and in FIG. 2 open contact pieces.
  • FIGS. 3 and 4 Another basic exemplary embodiment is also illustrated in two switch positions in FIGS. 3 and 4.
  • FIG. 5 shows a side view of a constructional exemplary embodiment which corresponds to the principle of operation according to FIGS. 1 and 2 and which is suitable for the optional use of one to three contact force springs.
  • FIG. 6 shows the section VI-VI in FIG. 5, but with the vacuum interrupter omitted.
  • the drive device of a vacuum interrupter 1 which has a fixed connecting pin 2 with a fixed switching piece 3 and a movable drive plunger 4 with a movable switching piece 5.
  • the connecting bolt 2 also serves to fasten the switching tube 1 in a suitable and not shown Wise.
  • the drive plunger 4 is connected at its end by a joint arrangement 6 to a two-armed lever 7, at the opposite end of which the force used to switch on the switching tube 1 is introduced. This is indicated in FIG. 2 by an arrow and the identifier F.
  • the two-armed lever 7 is pivotable about a bearing pin 8, which is displaceable in an elongated hole 9 of a bearing block 10.
  • the elongated hole 9 is aligned approximately parallel to the longitudinal axis of the switching tube 1, ie parallel to the longitudinal axis of the connecting bolt 2 and the drive plunger 4.
  • the driving force F also acts approximately parallel to the longitudinal axis of the switching tube 1.
  • the switched-off state of the switching tube 1 is shown in FIG.
  • the two-armed lever 7 bears against a stop 12 under the influence of a tension spring 11.
  • the tension spring 11 is supported on the one hand on a stationary abutment 13 and on the other hand on a bolt 14 of the lever 7 which is located between the bearing bolt 8 and an end region 15 of the lever 7 provided for the application of the force F.
  • the bearing pin 8 lies against the end of the elongated hole 9.
  • the tension spring 11 determines both the hold-open force acting on the switching tube 1 in the position of the parts according to FIG. 1 and the contact force in the position of FIG. 2.
  • the two-armed lever 7 is likewise pivotably mounted and displaceably guided with a bearing pin 8 in an elongated hole 9.
  • the joint arrangement 6 for connecting the two-armed lever 7 and the switching tube 1 is not located at one end of the lever, but between the end region 15 and the bearing pin 8.
  • the tension spring 11 engages to an end region 16 of the lever 7, which lies opposite the end region 15.
  • a force F is again applied to the end region 15 of the two-armed lever 7, but in the opposite sense to that in the previous exemplary embodiment.
  • the two-armed lever 7 first pivots about its bearing pin 8 until the contact pieces 3 and 5 of the switching tube 1 touch and the joint arrangement 6 on the drive tappet 4 acts as a pivot bearing.
  • the tension spring 11 is tensioned to apply the desired contact force.
  • FIGS. 5 and 6 show a construction example for a lever arrangement according to the principle shown in FIGS. 1 and 2.
  • the two-armed lever 7 here consists of two tab-like partial levers 20 (FIG. 6) which are arranged parallel to one another at such a distance that the tension spring 11 (FIG. 5) can engage between the partial levers 20.
  • the bolt 14 is formed on both sides protruding beyond the partial lever 20, to the extent that additional tension springs can be hooked in if necessary.
  • the distance between the partial levers 20 and side walls 21 and 22 of a frame-like sheet metal part 23 is selected accordingly.
  • a holding bolt 24 serving as a fixed abutment for one or more tension springs is also supported in these side walls. Both the bolt 14 and the bolt 24 are provided with notch-like recesses 25 which prevent the springs from moving laterally.
  • the side walls 21 and 22 of the frame 23 also contain two elongated holes 9 for guiding the bearing pin 8.
  • the joint arrangement 6 comprises a bearing block 26 attached to the end of the drive tappet 3 with parallel surfaces corresponding to the distance between the partial levers 20. Furthermore, the bearing block 26 carries pins 27 on both sides, over which the partial levers 20 engage. A flexible current band 30 connects the drive plunger 4 to a fixed connection piece 31.
  • the frame 23 is fastened on an insulating support plate 32 which can be common for a number of frames corresponding to the number of poles of the switching device.
  • the support plate 32 is in turn attached to a grounded base frame 34 via support insulators 33.
  • the arrangement shown can also be upside down, i. H. be arranged with the base frame 34 above if the switching device is to be attached, for example, to the top wall of a container filled with an insulating gas.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)

Abstract

The drive mechanism of a vacuum interrupter (1) has a two-armed lever (7), supported such that it can pivot, and a spring (11) which engages on the lever and provides the contact force. The two-armed lever (7) is guided in its bearing (oblong hole 9, pivot pin 8) such that it can move in a limited manner in a direction running approximately parallel to the direction of operation of the interrupter (1). On switching on, the two-armed lever (7), with its pivot pin (8), pivots about the end of the pin guide until the switching pieces (3, 5) make contact. Further pivoting of the lever (7) takes place about a hinge arrangement (6) between the two-armed lever (7) and the drive ram (4). The two-armed lever (7) can be formed from two parallel partial levers (20) at such a spacing that the spring (11) can engage between the partial levers. The drive mechanism is suitable for single or multipin vacuum power circuit breakers, for example for use in gas-insulated switching installations. <IMAGE>

Description

Die Erfindung betrifft eine Antriebsvorrichtung zum Ein- und Ausschalten einer Vakuumschaltröhre mit einem eine Antriebskraft übertragenden schwenkbar gelagerten zweiarmigen Hebel und einer an dem Hebel angreifenden, die Kontaktkraft bereitstellenden Feder.The invention relates to a drive device for switching a vacuum interrupter on and off with a pivotably mounted two-armed lever which transmits a drive force and a spring which acts on the lever and provides the contact force.

Eine Antriebsvorrichtung dieser Art ist durch die EP-B-0 159 960 bekannt geworden. Der Erfindung liegt die Aufgabe zugrunde, eine gleichfalls aus möglichst wenigen Teilen bestehende Antriebsvorrichtung zu schaffen, die sich jedoch im Unterschied zu der bekannten Antriebsvorrichtung vor allem für die Betätigung durch eine etwa parallel zur Längsachse der Vakuumschaltröhre wirkende Antriebskraft eignet und die auf einfache Weise mit unterschiedlich starker Federkraft ausgeführt werden kann.A drive device of this type is known from EP-B-0 159 960. The invention has for its object to provide a drive device which also consists of as few parts as possible, but which, in contrast to the known drive device, is particularly suitable for actuation by a drive force acting approximately parallel to the longitudinal axis of the vacuum interrupter, and which is easily different strong spring force can be performed.

Gemäß der Erfindung ist hierzu vorgesehen, daß die Feder mit ihrem einen Ende an einem ortsfesten Widerlager abgestützt ist und daß der Hebel in seinem Lager in einer etwa parallel zur Richtung der Betätigung der Schaltröhre verlaufenden Richtung begrenzt verschiebbar geführt ist. Das Lager, das zweckmäßig als Langloch ausgebildet sein kann, gestattet eine Schwenkung des Hebels um dessen gelenkige Verbindung mit dem Antriebsstößel der Schaltröhre. Dieser Vorgang tritt beim Einschalten auf, wenn der zweiarmige Hebel bis zur Berührung der Schaltstücke geschwenkt und dann durch die Antriebskraft entgegen der Kraft der Kontaktkraftfeder von dem Lager abgehoben und in der Führung verschoben wird. Beim Ausschalten wird der Hebel zunächst in seinem Lager solange geschwenkt, bis die Schaltstücke miteinander in Berührung treten und die zuvor angegebenen Bewegungen auftreten.According to the invention it is provided for this that the spring is supported at one end on a stationary abutment and that the lever in its bearing is guided to a limited extent in an approximately parallel to the direction of actuation of the switching tube. The bearing, which can expediently be designed as an elongated hole, allows the lever to be pivoted about its articulated connection with the drive plunger of the switching tube. This process occurs when switching on, when the two-armed lever is pivoted until it touches the contact pieces and is then lifted off the bearing by the driving force against the force of the contact force spring and moved in the guide. When switching off, the lever is first pivoted in its bearing until the contact pieces come into contact with each other and the previously specified ones Movements occur.

Eine wesentliche Eigenschaft der Antriebsvorrichtung nach der Erfindung besteht darin, daß sie an unterschiedliche Wege und Kräfte innerhalb weiter Grenzen angepaßt werden kann. Bei einer vorteilhaften Ausführungsform der Erfindung kann die Einleitung der Antriebskraft an dem einen Endbereich des Hebels und die Ankopplung des bewegbaren Stößels der Vakuumschaltröhre an dem anderen Endbereich des Hebels erfolgen, während die Feder zwischen dem Schwenklager und dem antriebsseitigen Endbereich des zweiarmigen Hebels angreift. Bei einer anderen Ausführungsform ist die Feder an dem einen Endbereich des Hebels angreifend angeordnet und das Schwenklager des Hebels befindet sich zwischen dem Angriffspunkt der Feder und der Anlenkung des bewegbaren Stößels der Schaltröhre an dem Hebel. Bei beiden Ausführungsformen ergeben sich unterschiedliche Hebellängen für die Übersetzung von der Kontaktkraftfeder auf die Schaltstücke.An essential property of the drive device according to the invention is that it can be adapted to different paths and forces within wide limits. In an advantageous embodiment of the invention, the introduction of the driving force to one end region of the lever and the coupling of the movable plunger of the vacuum interrupter to the other end region of the lever can take place while the spring acts between the pivot bearing and the drive-side end region of the two-armed lever. In another embodiment, the spring is arranged to engage one end region of the lever and the pivot bearing of the lever is located between the point of application of the spring and the articulation of the movable plunger of the switching tube on the lever. In both embodiments, there are different lever lengths for the translation from the contact force spring to the contact pieces.

Ein verkantungsfreier Angriff der Betätigungs- und Antriebskräfte kann dadurch erreicht werden, daß der zweiarmige Hebel aus zwei parallel zueinander angeordneten Laschen gebildet ist, deren Abstand wenigstens dem Durchmesser der Feder entspricht. Die Feder kann dann beispielsweise an einem die Laschen bzw. Teilhebel durchsetzenden Stift oder Bolzen eingehängt werden.A tilt-free attack of the actuating and driving forces can be achieved in that the two-armed lever is formed from two brackets arranged parallel to one another, the distance between which corresponds at least to the diameter of the spring. The spring can then be hung, for example, on a pin or bolt passing through the tabs or partial levers.

Es besteht auch die Möglichkeit, unabhängig von der prinzipiellen Zuordnung des Lagers und der Angriffstellen für äußere Antriebskraft, Federkraft und Antriebsstößel der Schaltröhre die Federkraft durch Parallelschaltung von zwei oder mehr Federn zu variieren. Hierzu können der Hebel und die Feder in einem ortsfest abgestützten Rahmen gelagert bzw. angeordnet sein, dessen Seitenwände von den Laschen des Hebels mindestens um den Durchmesser der Feder entfernt angeordnet sind. Auf diese Weise können beispielsweise anstelle der einen, zwischen den Laschen des Hebels befindlichen Feder in den Räumen zwischen den Seitenwänden des Rahmens und den Laschen des Hebels jeweils eine Feder oder zusätzlich auch die Feder der Grundanordnung vorgesehen sein. Damit stehen unabhängig von dem vorgesehenen Federtyp drei unterschiedliche Kräfte zur Verfügung.It is also possible to vary the spring force by connecting two or more springs in parallel, irrespective of the basic assignment of the bearing and the points of application for external driving force, spring force and drive tappet of the switching tube. For this purpose, the lever and the spring can be mounted or arranged in a stationary frame, the side walls of which are arranged at least around the diameter of the spring from the tabs of the lever. In this way, for example, instead of the one spring located between the tabs of the lever in the spaces between the side walls of the frame and the tabs of the lever, respectively a spring or additionally the spring of the basic arrangement can be provided. This means that three different forces are available regardless of the type of spring provided.

Ein den Hebel bzw. dessen parallele Laschen durchsetzender Bolzen und ein parallel hierzu in den Seitenwänden des Rahmens abgestützter Bolzen können mit Einkerbungen als Lagesicherungen für die wahlweise vorgesehenen Federn versehen sein. Auf diese Weise in sichergestellt, daß die Federkräfte an dem Hebel symmetrisch angreifen.A bolt passing through the lever or its parallel tabs and a bolt supported parallel to it in the side walls of the frame can be provided with notches as positional securing means for the optionally provided springs. This ensures that the spring forces act symmetrically on the lever.

Die Erfindung wird im folgenden anhand der Figuren näher erläutert.The invention is explained in more detail below with reference to the figures.

Die Figuren 1 und 2 zeigen schematisch eine prinzipielle Ausführungsform der Erfindung. Hierbei ist eine Vakuumschaltröhre in der Figur 1 mit geschlossenen Schaltstücken und in der Figur 2 geöffneten Schaltstücken gezeigt.Figures 1 and 2 show schematically a basic embodiment of the invention. A vacuum interrupter is shown in FIG. 1 with closed contact pieces and in FIG. 2 open contact pieces.

Ein anderes prinzipielles Ausführungsbeispiel ist gleichfalls in zwei Schaltstellungen in den Figuren 3 und 4 veranschaulicht.Another basic exemplary embodiment is also illustrated in two switch positions in FIGS. 3 and 4.

Die Figur 5 zeigt in einer Seitenansicht ein konstruktives Ausführungsbeispiel, das dem Wirkungsprinzip gemäß den Figuren 1 und 2 entspricht und das für die wahlweise Verwendung von ein bis drei Kontaktkraftfedern geeignet ist.FIG. 5 shows a side view of a constructional exemplary embodiment which corresponds to the principle of operation according to FIGS. 1 and 2 and which is suitable for the optional use of one to three contact force springs.

In der Figur 6 ist der Schnitt VI-VI in Figur 5 gezeigt, jedoch mit fortgelassener Vakuumschaltröhre.FIG. 6 shows the section VI-VI in FIG. 5, but with the vacuum interrupter omitted.

In den Figuren 1 und 2 ist die Antriebsvorrichtung einer Vakuumschaltröhre 1 dargestellt, die einen feststehenden Anschlußbolzen 2 mit einem feststehenden Schaltstück 3 sowie einen bewegbaren Antriebsstößel 4 mit einem bewegbaren Schaltstück 5 besitzt. Der Anschlußbolzen 2 dient zugleich zur Befestigung der Schaltröhre 1 in geeigneter und nicht näher gezeigter Weise. Der Antriebsstößel 4 ist an seinem Ende durch eine Gelenkanordnung 6 mit einem zweiarmigen Hebel 7 verbunden, an dessen gegenüberliegendem Ende die zum Einschalten der Schaltröhre 1 dienende Kraft eingeleitet wird. In der Figur 2 ist dies mit einem Pfeil und dem Kennzeichen F angedeutet. Der zweiarmige Hebel 7 ist um einen Lagerbolzen 8 schwenkbar, der in einem Langloch 9 eines Lagerbockes 10 verschiebbar ist. Das Langloch 9 ist dabei etwa parallel zur Längsachse der Schaltröhre 1, d. h. parallel zu der Längsachse des Anschlußbolzens 2 und des Antriebsstößels 4 ausgerichtet. Auch die Antriebskraft F wirkt etwa parallel zur Längsachse der Schaltröhre 1.In Figures 1 and 2, the drive device of a vacuum interrupter 1 is shown, which has a fixed connecting pin 2 with a fixed switching piece 3 and a movable drive plunger 4 with a movable switching piece 5. The connecting bolt 2 also serves to fasten the switching tube 1 in a suitable and not shown Wise. The drive plunger 4 is connected at its end by a joint arrangement 6 to a two-armed lever 7, at the opposite end of which the force used to switch on the switching tube 1 is introduced. This is indicated in FIG. 2 by an arrow and the identifier F. The two-armed lever 7 is pivotable about a bearing pin 8, which is displaceable in an elongated hole 9 of a bearing block 10. The elongated hole 9 is aligned approximately parallel to the longitudinal axis of the switching tube 1, ie parallel to the longitudinal axis of the connecting bolt 2 and the drive plunger 4. The driving force F also acts approximately parallel to the longitudinal axis of the switching tube 1.

In der Figur 1 ist der ausgeschaltete Zustand der Schaltröhre 1 gezeigt. Der zweiarmige Hebel 7 liegt hierbei unter dem Einfluß einer Schraubenzugfeder 11 an einem Anschlag 12 an. Die Zugfeder 11 ist einerseits an einem ortsfesten Widerlager 13 abgestützt und andererseits an einem Bolzen 14 des Hebels 7, der sich zwischen dem Lagerbolzen 8 und einem für den Angriff der Kraft F vorgesehenen Endbereich 15 des Hebels 7 befindet. In diesem Zustand liegt der Lagerbolzen 8 am Ende des Langloches 9 an.The switched-off state of the switching tube 1 is shown in FIG. The two-armed lever 7 bears against a stop 12 under the influence of a tension spring 11. The tension spring 11 is supported on the one hand on a stationary abutment 13 and on the other hand on a bolt 14 of the lever 7 which is located between the bearing bolt 8 and an end region 15 of the lever 7 provided for the application of the force F. In this state, the bearing pin 8 lies against the end of the elongated hole 9.

Wird ausgehend von der in der Figur 1 gezeigten Stellung der Teile die Kraft F auf den Endbereich 15 des Hebels 7 zur Einwirkung gebracht, so führt der zweiarmige Hebel 7 zunächst um seinen Lagerbolzen 8 eine Schwenkbewegung aus, in deren Verlauf die Zugfeder 11 gespannt wird und der Lagerbolzen 8 weiterhin die in der Figur 1 gezeigte Stellung am Ende des Langloches 9 beibehält. Sobald sich die Schaltstücke 3 und 5 der Schaltröhre 1 berühren, wird die Gelenkanordnung 6 zwischen dem zweiarmigen Hebel 7 und dem Antriebsstößel 4 zum Schwenkpunkt des Hebels 7. Dabei wird der Lagerbolzen 8 von dem Ende des Langloches 9 abgehoben, bis nach entsprechender Spannung der Feder 11 das Ende des Antriebshubes unter dem Einfluß der Kraft F erreicht ist. Dieser Zustand ist in der Figur 2 dargestellt.If, starting from the position of the parts shown in FIG. 1, the force F is exerted on the end region 15 of the lever 7, the two-armed lever 7 first performs a pivoting movement about its bearing pin 8, in the course of which the tension spring 11 is tensioned and the bearing pin 8 also maintains the position shown in FIG. 1 at the end of the elongated hole 9. As soon as the contact pieces 3 and 5 of the switching tube 1 touch, the joint arrangement 6 between the two-armed lever 7 and the drive tappet 4 becomes the pivot point of the lever 7. The bearing pin 8 is lifted from the end of the elongated hole 9 until after the spring has been suitably tensioned 11 the end of the drive stroke is reached under the influence of the force F. This state is shown in Figure 2.

Wie man erkennt, bestimmt die Zugfeder 11 sowohl die auf die Schaltröhre 1 wirkende Offenhaltekraft in der Stellung der Teile gemäß der Figur 1 als auch die Kontaktkraft in der Stellung der Figur 2. Durch geeignete Wahl der Hebellängen des zweiarmigen Hebels 7 bezüglich des Lagerbolzens 8 und durch die Lage des Bolzens 14 zwischen dem Endbereich 15 und dem Lagerbolzen 8 können diese Kräfte passend gewählt werden.As can be seen, the tension spring 11 determines both the hold-open force acting on the switching tube 1 in the position of the parts according to FIG. 1 and the contact force in the position of FIG. 2. By a suitable choice of the lever lengths of the two-armed lever 7 with respect to the bearing pin 8 and due to the position of the bolt 14 between the end region 15 and the bearing bolt 8, these forces can be selected appropriately.

In dem Ausführungsbeispiel gemäß den Figuren 3 und 4 ist der zweiarmige Hebel 7 gleichfalls mit einem Lagerbolzen 8 in einem Langloch 9 zugleich schwenkbar gelagert und verschiebbar geführt. Im Unterschied zu dem Ausführungsbeispiel gemäß den Figuren 1 und 2 befindet sich jedoch die Gelenkanordnung 6 für die Verbindung des zweiarmigen Hebels 7 und der Schaltröhre 1 nicht an einem Ende des Hebels, sondern zwischen dem Endbereich 15 und dem Lagerbolzen 8. Ferner greift die Zugfeder 11 an einem Endbereich 16 des Hebels 7 an, der dem Endbereich 15 gegenüberliegt.In the exemplary embodiment according to FIGS. 3 and 4, the two-armed lever 7 is likewise pivotably mounted and displaceably guided with a bearing pin 8 in an elongated hole 9. In contrast to the exemplary embodiment according to FIGS. 1 and 2, however, the joint arrangement 6 for connecting the two-armed lever 7 and the switching tube 1 is not located at one end of the lever, but between the end region 15 and the bearing pin 8. Furthermore, the tension spring 11 engages to an end region 16 of the lever 7, which lies opposite the end region 15.

In der Figur 3 ist die Schaltröhre 1 im ausgeschalteten Zustand gezeigt. Übereinstimmend mit der Figur 1 nimmt dabei der zweiarmige Hebel 7 unter dem Einfluß der Zugfeder 11 eine geneigte Stellung ein, bei welcher der Gelenkbolzen 8 in dem Langloch 9 das Schwenklager darstellt.In Figure 3, the switching tube 1 is shown in the switched-off state. In accordance with FIG. 1, the two-armed lever 7 assumes an inclined position under the influence of the tension spring 11, in which the hinge pin 8 in the slot 9 represents the pivot bearing.

Zum Einschalten wird wiederum auf den Endbereich 15 des zweiarmigen Hebels 7 eine Kraft F zur Einwirkung gebracht, jedoch im umgekehrten Sinn wie in dem vorangegangenen Ausführungsbeispiel. Unter dem Einfluß dieser Kraft führt der zweiarmige Hebel 7 zunächst eine Schwenkung um seinen Lagerbolzen 8 aus, bis sich die Schaltstücke 3 und 5 der Schaltröhre 1 berühren und die Gelenkanordnung 6 an dem Antriebsstößel 4 als Schwenklager wirkt. Bis zum Erreichen der Endstellung unter dem Einfluß der Kraft F wird die Zugfeder 11 zur Aufbringung der gewünschten Kontaktkraft gespannt.To switch on, a force F is again applied to the end region 15 of the two-armed lever 7, but in the opposite sense to that in the previous exemplary embodiment. Under the influence of this force, the two-armed lever 7 first pivots about its bearing pin 8 until the contact pieces 3 and 5 of the switching tube 1 touch and the joint arrangement 6 on the drive tappet 4 acts as a pivot bearing. Until the end position is reached under the influence of the force F, the tension spring 11 is tensioned to apply the desired contact force.

Die Figuren 5 und 6 zeigen ein Konstruktionsbeispiel für eine Hebelanordnung entsprechend dem in den Figuren 1 und 2 gezeigten Prinzip. Der zweiarmige Hebel 7 besteht hierbei aus zwei laschenartigen Teilhebeln 20 (Figur 6), die parallel zueinander in einem solchen Abstand angeordnet sind, daß die Zugfeder 11 (Figur 5) zwischen die Teilhebel 20 eingreifen kann. Für den Angriff der Federkraft an dem zweiarmigen Hebel 7 bzw. den Teilhebeln 20 ist der Bolzen 14 beidseitig über die Teilhebel 20 überstehend ausgebildet, und zwar soweit, daß im Bedarfsfall zusätzliche Zugfedern eingehängt werden können. Hierzu ist der Abstand zwischen den Teilhebeln 20 und Seitenwänden 21 und 22 eines rahmenartigen Blechteiles 23 entsprechend gewählt. In diesen Seitenwänden ist auch ein als ortsfestes Widerlager einer oder mehrerer Zugfedern dienender Haltebolzen 24 abgestützt. Sowohl der Bolzen 14 als auch der Bolzen 24 sind mit kerbenartigen Eindrehungen 25 versehen, die ein seitliches Verschieben der Federn verhindern. Die Seitenwände 21 und 22 des Rahmens 23 enthalten auch zwei Langlöcher 9 zur Führung des Lagerbolzens 8.FIGS. 5 and 6 show a construction example for a lever arrangement according to the principle shown in FIGS. 1 and 2. The two-armed lever 7 here consists of two tab-like partial levers 20 (FIG. 6) which are arranged parallel to one another at such a distance that the tension spring 11 (FIG. 5) can engage between the partial levers 20. For the attack of the spring force on the two-armed lever 7 or the partial levers 20, the bolt 14 is formed on both sides protruding beyond the partial lever 20, to the extent that additional tension springs can be hooked in if necessary. For this purpose, the distance between the partial levers 20 and side walls 21 and 22 of a frame-like sheet metal part 23 is selected accordingly. A holding bolt 24 serving as a fixed abutment for one or more tension springs is also supported in these side walls. Both the bolt 14 and the bolt 24 are provided with notch-like recesses 25 which prevent the springs from moving laterally. The side walls 21 and 22 of the frame 23 also contain two elongated holes 9 for guiding the bearing pin 8.

Wie die Figur 5 ferner zeigt, umfaßt die Gelenkanordnung 6 einen am Ende des Antriebsstößels 3 angebrachten Lagerklotz 26 mit parallelen, dem Abstand der Teilhebel 20 entsprechenden Flächen. Ferner trägt der Lagerklotz 26 beidseitig Zapfen 27, über welche die Teilhebel 20 greifen. Ein biegsames Stromband 30 verbindet den Antriebsstößel 4 mit einem ortsfesten Anschlußstück 31.As FIG. 5 also shows, the joint arrangement 6 comprises a bearing block 26 attached to the end of the drive tappet 3 with parallel surfaces corresponding to the distance between the partial levers 20. Furthermore, the bearing block 26 carries pins 27 on both sides, over which the partial levers 20 engage. A flexible current band 30 connects the drive plunger 4 to a fixed connection piece 31.

Der Rahmen 23 ist auf einer isolierenden Tragplatte 32 befestigt, die für eine der Polzahl des Schaltgerätes entsprechende Anzahl von Rahmen gemeinsam sein kann. Die Tragplatte 32 ist ihrerseits über Stützisolatoren 33 an einem geerdeten Grundrahmen 34 befestigt. Die gezeigte Anordnung kann auch kopfstehend, d. h. mit obenliegendem Grundrahmen 34 angeordnet sein, wenn das Schaltgerät beispielsweise an der Oberwand eines mit einem Isoliergas gefülltem Behälters angebracht werden soll.The frame 23 is fastened on an insulating support plate 32 which can be common for a number of frames corresponding to the number of poles of the switching device. The support plate 32 is in turn attached to a grounded base frame 34 via support insulators 33. The arrangement shown can also be upside down, i. H. be arranged with the base frame 34 above if the switching device is to be attached, for example, to the top wall of a container filled with an insulating gas.

Claims (6)

  1. Drive device for switching on and off a vacuum interrupter (1), having a two-armed lever (7) which is mounted for pivoting and imparts a drive force (F) and a spring (11) which acts on the lever and provides the contact force, characterised in that one end of the spring (11) is supported on a fixed support (13; 24) and in that the lever (7) is guided in its bearing (9, 10) for limited displacement in a direction extending approximately parallel with the direction of actuation of the interrupter (1).
  2. Drive device according to claim 1, characterised in that the drive force (F) is introduced at one end region (15) of the lever (7) and the movable push rod (4) of the vacuum interrupter (1) is connected to the other end region (16) of the lever (7), and in that the spring (11) acts between the pivot bearing (9, 10) and the end region (15) of the two-armed lever (7) on the drive side.
  3. Drive device according to claim 1, characterised in that the spring (11) is arranged for acting on one end region (15) of the lever (7), and in that the pivot bearing (9, 10) of the lever (7) is located between the point of action of the spring (11) and the linkage of the movable push rod (4) of the interrupter (1) to the lever (7).
  4. Drive device according to one of the preceding claims, characterised in that the two-armed lever (7) is formed by two brackets (20) arranged in parallel with each other and with spacing which corresponds at least to the diameter of the spring (11).
  5. Drive device according to claim 4, characterised in that the lever (7) and the spring (11) are supported and/or arranged in a frame (23) which is supported in a fixed manner and the side walls (21, 22) of which are arranged so that they are separated from the brackets (20) of the lever (7) at least by the diameter of the spring (11).
  6. Drive device according to claim 5, characterised in that a pin (14) passing through the lever (7) or the parallel brackets (20) thereof and a pin (24) supported parallel thereto in the side walls (21, 22) of the frame (23) are provided with grooves (25) as a means for selectively securing in position one, two or three springs (11).
EP90250112A 1989-05-11 1990-05-03 Drive mechanism for a vacuum interrupter with a contact spring Expired - Lifetime EP0397294B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3915522 1989-05-11
DE3915522A DE3915522A1 (en) 1989-05-11 1989-05-11 DRIVE DEVICE FOR A VACUUM SWITCH TUBE WITH A CONTACT SPRING

Publications (3)

Publication Number Publication Date
EP0397294A2 EP0397294A2 (en) 1990-11-14
EP0397294A3 EP0397294A3 (en) 1992-06-17
EP0397294B1 true EP0397294B1 (en) 1995-02-15

Family

ID=6380512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250112A Expired - Lifetime EP0397294B1 (en) 1989-05-11 1990-05-03 Drive mechanism for a vacuum interrupter with a contact spring

Country Status (6)

Country Link
US (1) US5069077A (en)
EP (1) EP0397294B1 (en)
JP (1) JP2813032B2 (en)
AT (1) ATE118644T1 (en)
DE (2) DE3915522A1 (en)
ES (1) ES2068330T3 (en)

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Also Published As

Publication number Publication date
EP0397294A2 (en) 1990-11-14
JP2813032B2 (en) 1998-10-22
EP0397294A3 (en) 1992-06-17
DE3915522A1 (en) 1990-11-15
US5069077A (en) 1991-12-03
ATE118644T1 (en) 1995-03-15
ES2068330T3 (en) 1995-04-16
JPH034417A (en) 1991-01-10
DE59008456D1 (en) 1995-03-23

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