EP0222685B1 - Contact arrangement with contact levers mounted in a holder in pivotal relationship to each other - Google Patents

Contact arrangement with contact levers mounted in a holder in pivotal relationship to each other Download PDF

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Publication number
EP0222685B1
EP0222685B1 EP86730162A EP86730162A EP0222685B1 EP 0222685 B1 EP0222685 B1 EP 0222685B1 EP 86730162 A EP86730162 A EP 86730162A EP 86730162 A EP86730162 A EP 86730162A EP 0222685 B1 EP0222685 B1 EP 0222685B1
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EP
European Patent Office
Prior art keywords
holder
contact
connecting straps
contact arrangement
arrangement according
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
EP86730162A
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German (de)
French (fr)
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EP0222685A1 (en
Inventor
Joachim Dipl.-Ing. Grad. Kroll
Reinhard Dipl.-Ing. Kugler
Bernd Dipl.-Phys. Rambotzki
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Siemens AG
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Siemens AG
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Publication date
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Publication of EP0222685A1 publication Critical patent/EP0222685A1/en
Application granted granted Critical
Publication of EP0222685B1 publication Critical patent/EP0222685B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars

Definitions

  • the invention relates to a contact arrangement with a plurality of contact levers which are pivotally mounted in a holder relative to one another, the holder in turn being movable about a stationary bearing for switching on and off.
  • a contact arrangement of this type is known, for example, from US-A-3 402 274.
  • attractive forces act between adjacent contact levers and therefore current flows through them in the same direction, while the entire movable part of the contact arrangement can be exposed to lateral magnetic forces.
  • these influences lead to a relative displacement of the contact piece supports, which not only causes wear due to friction of the contact surfaces relative to one another, but also leads to scratches and erosion.
  • the invention has for its object to increase the performance of multi-unit contact arrangement in that, despite the series production of such contact arrangements, the bearing tolerance of the movable part of the contact arrangement is reduced as much as possible.
  • the bearing is designed as a bearing bracket encompassing the holder, which is composed of parts connected to one another in an adapted and unchangeable distance to the holder.
  • the bearing bracket receives its final dimensions only when it is assembled with the holder of the contact lever. Regardless of the width of the holder, which can fluctuate due to the tolerance of the semi-finished products used and the tolerance of surface layers as well as of insert parts and similar influences, the same bearing tolerance is always achieved within the bracket.
  • such a bearing bracket can have two mirror-inverted angles, one leg of which is arranged parallel to the side walls of the holder and the other legs of which are arranged one above the other, the further legs being connected at the correct distance by overlying connecting straps.
  • This makes it possible to assemble the bearing bracket from different materials in order to achieve desirable properties, particularly from a magnetic point of view. If, for example, connecting lugs made of a non-magnetic steel or another non-magnetic material are selected, the formation of a magnetic enclosure of the contact levers is avoided.
  • connection of the parts of the bearing bracket at an unchangeable distance can be brought about in that the connecting straps are provided with openings for use as a die, into which material from the further legs of the angle can be pressed by a plastic deformation.
  • a connection of the parts of the bearing bracket is achieved, which can absorb considerable shear forces and which also ensures the cohesion of the parts of the bearing bracket within the scope of a normal, workshop-like handling, until other connecting means are attached in addition to the matrix connection, e.g. B. rivets, screws or a connection method, such as. B. spot welding has been applied.
  • the additional fastening means only have to absorb forces which act in the direction of lifting the parts apart, since the shear forces acting perpendicularly to them are absorbed by the die connection.
  • the angle 1 shown in FIGS. 1, 2 and 3 is used to produce a bearing bracket as shown in FIG 4 and 5 is shown.
  • the angle 1 has a leg 2 which is provided with a through opening 3 for a bearing pin.
  • Another leg 4 standing at right angles to leg 2 likewise contains a through opening 5 which is provided for receiving a screw to be used in the course of the manufacture of the bearing bracket.
  • An extension 6, which also has a through opening 7, is bent out of the plane of the leg 4.
  • the part of the leg 4 located below the extension 6 has a laterally open recess 10 which is used for fastening when the finished bearing bracket is installed in a switching device.
  • a complete bearing bracket 11, as shown in FIGS. 4 and 5, consists of an angle 1 according to FIGS. 1, 2 and 3 as well as a further angle 1 ′ which is completely mirror-inverted to this angle; Furthermore, connecting straps 12 in the form of rectangular pieces of sheet metal are required. These parts, ie the angles 1 and 1 'and the connecting straps 12 are connected in such a way that the distance between the legs 2 and 2' of the angles 1 and 1 'corresponds to the smallest possible tolerance of the width d of a holder 12 used to hold contact levers.
  • a bearing pin 14 which engages in side walls 13 of the holder 12 can be used to position the parts, and the pivoting movement of the holder 12 is provided in later operation for switching the contact arrangement on and off.
  • FIG. 5 shows, the legs 4 and 4 'of the angles 1 and 1' face each other at a distance.
  • connecting tabs 15 in the form of rectangular pieces of sheet metal made of a non-magnetic material are used, which are each provided with two through openings 16 and two further, outer, larger through openings 17. Due to a plastic deformation of the material of the legs 4 and extensions 6, material is now pressed into the openings 16 of the connecting straps 15, whereby a positive connection between the angles 2 and the connecting straps 15 is created. This process can be carried out in different ways, since both hand tools and machine devices can be used.
  • the result of the plastic deformation is a pin of the legs 4 and 4 'and the extensions 6 and 6' which protrude into the openings 16 and which fix the angles 1 and 1 'at a dimensionally correct distance.
  • the through openings 17 of the connecting straps 15 are aligned with the through openings 5 of the legs 4 and 4 'and the through openings 7 of the extensions 6 and 6', respectively.
  • the screws By inserting screws into these aligned openings, the parts of the bearing bracket 11 are permanently connected, the screws merely ensuring the cohesion of the parts, but not taking over the shear forces that occur or determining the dimensional accuracy of the bearing bracket 11.
  • other fasteners can be used, e.g. B. rivets, or spot welding or a similar method can be used.
  • screws have the advantage that the bearing bracket can be dismantled, since the die connection can also be separated by suitable tools.
  • connecting lugs can be used without die extinguisher, and through holes can be made in the correctly positioned position of the parts, into which suitable connecting means, e.g. B. Grooved pins can be inserted.
  • suitable connecting means e.g. B. Grooved pins
  • rivets can be used to create both the temporary and shear link as well as a permanent and permanent connection. In this case, as well as when the parts are welded locally, there is no possibility of disassembling the bearing bracket again if this occurs immediately after the initial connection or later, e.g. B. at a repair of a circuit breaker is desired.
  • a contact arrangement 20 for a low-voltage circuit breaker which comprises a fixed part 21 and a movable part 22.
  • the movable part 21 has an insulating block 23 which carries an upper connecting bar 24 and a lower forked connecting bar 25.
  • a stationary contact body 26 with a contact piece support 27 as well as a burn-off contact body 31 with a further contact piece support 32 and an electric arc 33 are connected to the upper connecting bar in a conductive connection Guide the burn contact lever 36.
  • the two outer contact levers 35 have contact piece supports 37, while the middle contact lever 36 has a movable burn-off contact body 40 with a contact piece support 41.
  • An arcing horn 42 is also connected to the burn-off contact body 40.
  • the contact levers 35 and 36 are pivotable about a hinge pin 43 and are under the influence of compression springs, which are arranged in a known manner between the legs of the current strips 34.
  • the contact levers 35 and 36 are located in a holder 44, which corresponds in its construction to the holder 13 in FIGS. 4 and 5, but has a somewhat different shape of its side parts 45.
  • the side parts 45 receive a bearing pin 46 and a coupling pin 47.
  • the bearing pin 46 serves as a pivot bearing of the movable part 22 of the contact arrangement 1 around the bearing bracket in principle 11 in Figures 5 and 6 corresponding bearing bracket 50 which is attached to the insulating block 23.
  • Insulating coupling members 51 which are connected to a suitable drive device of the circuit breaker, engage on the coupling bolt 47.
  • the side walls 45 of the holder 44 are held by two or more bolts 53 at a distance caused by the contact levers 35 and 36 and between the intermediate layers 52 located between them. Because of the known influences, the width of the lamp can therefore vary.
  • the bearing bracket is adapted to this width dimension in the manner described, so that individual dimensional deviations are always taken into account even in the case of series production of contact arrangements. all contact arrangements thus have a practically achievable lowest possible lateral guiding tolerance.
  • support brackets 54 for the current strips 34 engage between the side walls 45 of the holder 44 and the bearing bracket.
  • these angles have no influence on the interaction of the bearing bracket 50 with the holder 44, since these parts are provided with facing impressions 55 and 56, which serve as guide surfaces. Due to the impressions 55 and 56, there is a distance between the side walls 45 of the holder 44 and the bearing bracket 50, which is in any case greater than the thickness of the support bracket 54.

Landscapes

  • Breakers (AREA)
  • Manufacture Of Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

Die Erfindung betrifft eine Kontaktanordnung mit mehreren Kontakthebeln, die in einem Halter relativ zueinander schwenkbar gelagert sind, wobei der Halter seinerseits um ein ortsfestes Lager zum Ein-und Ausschalten bewegbar ist.The invention relates to a contact arrangement with a plurality of contact levers which are pivotally mounted in a holder relative to one another, the holder in turn being movable about a stationary bearing for switching on and off.

Eine Kontaktanordnung dieser Art ist beispielsweise durch die US-A-3 402 274 bekannt geworden. Für das Verhalten solcher Kontaktanordnung beim Schalten mit einem hohen Strom, wie er im Betrieb von Niederspannungs-Leistungsschaltem auftreten kann, sind nicht nur die kontaktgebenden Eigenschaften der miteinander in Berührung tretenden Schaltstücke, sondern auch mechanische Eigenschaften der Kontaktanordnung von erheblicher Bedeutung. Beispielsweise wirken zwischen benachbarten und daher in gleicher Richtung vom Strom durchflossenen Kontakthebeln anziehende Kräfte, während der gesamte bewegliche Teil der Kontaktanordnung seitlichen magnetischen Kräften ausgesetzt sein kann. Diese Einflüsse führen in Verbindung mit einem unvermeidbaren Lagerspiel zu einer relativen Verschiebung der Schaltstückauflagen, was nicht nur einen Verschleiß durch Reibung der Kontaktflächen relativ zueinander bewirkt, sondern auch zu Spratzerscheinungen und Abbrand führt.A contact arrangement of this type is known, for example, from US-A-3 402 274. For the behavior of such a contact arrangement when switching with a high current, as can occur in the operation of low-voltage power switches, not only the contacting properties of the contacting pieces that come into contact with one another, but also mechanical properties of the contact arrangement are of considerable importance. For example, attractive forces act between adjacent contact levers and therefore current flows through them in the same direction, while the entire movable part of the contact arrangement can be exposed to lateral magnetic forces. In combination with an unavoidable bearing play, these influences lead to a relative displacement of the contact piece supports, which not only causes wear due to friction of the contact surfaces relative to one another, but also leads to scratches and erosion.

Der Erfindung liegt die Aufgabe zugrunde, die Leistungsfähigkeit mehrgliedriger Kontaktanordnung dadurch zu erhöhen, daß trotz serienmäßiger Herstellung solcher Kontaktanordnungen die Lagertoleranz des bewegbaren Teiles der Kontaktanordnung soweit wie möglich verringert wird.The invention has for its object to increase the performance of multi-unit contact arrangement in that, despite the series production of such contact arrangements, the bearing tolerance of the movable part of the contact arrangement is reduced as much as possible.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß das Lager als ein den Halter umgreifender Lagerbügel ausgebildet ist, der aus miteinander in einem dem Halter angepaßten und unveränderbaren Abstand verbundenen Teil zusammengesetzt ist. Der Lagerbügel erhält dabei seine endgültigen Abmessungen erst beim Zusammenfügen mit dem Halter der Kontakthebel. Unabhängig von der Breite des Halters, die bereits aufgrund der Toleranz der verwendeten Halbzeuge sowie der Toleranz von Oberflächenschichten sowie von Beilageteilen und ähnlichen Einflüssen schwanken kann, wird so stets die gleiche Lagertoleranz innerhalb des Bügels erreicht.This object is achieved according to the invention in that the bearing is designed as a bearing bracket encompassing the holder, which is composed of parts connected to one another in an adapted and unchangeable distance to the holder. The bearing bracket receives its final dimensions only when it is assembled with the holder of the contact lever. Regardless of the width of the holder, which can fluctuate due to the tolerance of the semi-finished products used and the tolerance of surface layers as well as of insert parts and similar influences, the same bearing tolerance is always achieved within the bracket.

In vorteilhafter Weise kann ein solcher Lagerbügel zwei spiegelbildlich ausgebildete Winkel aufweisen, deren einer Schenkel parallel zu Seitenwänden des Halters und deren weitere Schenkel aufeinanderweisend angeordnet sind, wobei die weiteren Schenkel durch aufliegende Verbindungslaschen in maßgerechtem Abstand verbunden sind. Dies erlaubt es, den Lagerbügel aus unterschiedlichen Werkstoffen zusammenzusetzen, um insbesondere in magnetischer Hinsicht erwünschte Eigenschaften zu erzielen. Werden beispielsweise Verbindungslaschen aus einem unmagnetischen Stahl oder einem anderen unmagnetischen Werkstoff gewählt, so wird die Bildung eines magnetischen Umschlusses der Kontakthebel vermieden.Advantageously, such a bearing bracket can have two mirror-inverted angles, one leg of which is arranged parallel to the side walls of the holder and the other legs of which are arranged one above the other, the further legs being connected at the correct distance by overlying connecting straps. This makes it possible to assemble the bearing bracket from different materials in order to achieve desirable properties, particularly from a magnetic point of view. If, for example, connecting lugs made of a non-magnetic steel or another non-magnetic material are selected, the formation of a magnetic enclosure of the contact levers is avoided.

Die Verbindung der Teile des Lagerbügels in einem unveränderbaren Abstand kann dadurch herbeigeführt werden, daß die Verbindungslaschen zur Benutzung als Matritze mit Öffnungen versehen sind, in die Material aus den weiteren Schenkeln der Winkel durch eine plastische Verformung eindrückbar ist. Auf diese Weise wird eine Verbindung der Teile des Lagerbügels erreicht, die beträchtliche Scherkräfte aufnehmen kann und die ferner den Zusammenhalt der Teile des Lagerbügels im Rahmen einer üblichen, werkstattmäßigen Handhabung gewährleistet, bis zusätzlich zu der Matritzenverbindung sonstige Verbindungsmittel angebracht werden, z. B. Niete, Schrauben oder ein Verbindungsverfahren, wie z. B. Punktschweißen angewandt worden ist.The connection of the parts of the bearing bracket at an unchangeable distance can be brought about in that the connecting straps are provided with openings for use as a die, into which material from the further legs of the angle can be pressed by a plastic deformation. In this way, a connection of the parts of the bearing bracket is achieved, which can absorb considerable shear forces and which also ensures the cohesion of the parts of the bearing bracket within the scope of a normal, workshop-like handling, until other connecting means are attached in addition to the matrix connection, e.g. B. rivets, screws or a connection method, such as. B. spot welding has been applied.

Es ist zweckmäßig, die Öffnungen für einen zur vollständigen Übertragung von durch Stromkräften hervorgerufenen Beanspruchungen ausreichenden Materialquerschnitt zu bemessen. Die zusätzlichen Verbindungsmittel brauchen dann nur Normalkräfte zu übertragen.It is expedient to dimension the openings for a material cross section sufficient for the complete transmission of stresses caused by current forces. The additional connecting means then only need to transmit normal forces.

Im Rahmen der Erfindung kann eine Kontaktanordnung der beschriebenen Art durch ein Verfahren mit folgenden Schritten hergestellt werden:

  • a) die Winkel werden beidseitig des mit Kontakthebeln versehenen Halters maßgerecht positioniert;
  • b) die Verbindungslaschen werden auf die weiteren Schenkel der Winkel aufgelegt;
  • c) durch Druckanwendung mittels eines Werkzeuges werden die weiteren Schenkel örtlich plastisch soweit verformt, daß Material in die Öffnungen der Verbindunglaschen eintritt und hierdurch die Winkel in einem an den Halter angepaßten Abstand miteinander verbunden werden;
  • d) die Winkel und die Verbindungslaschen werden durch zusätzliche Befestigungselemente dauerhaft verbunden.
In the context of the invention, a contact arrangement of the type described can be produced by a method with the following steps:
  • a) the angles are positioned on both sides of the holder provided with contact levers;
  • b) the connecting straps are placed on the other legs of the angle;
  • c) by applying pressure using a tool, the other legs are locally plastically deformed to such an extent that material enters the openings of the connecting straps and the angles are thereby connected to one another at a distance adapted to the holder;
  • d) the angles and the connecting straps are permanently connected by additional fastening elements.

Die zusätzlichen Befestigungsmittel brauchen nur Kräfte aufzunehmen, die in der Richtung einer Abhebung der Teile voneinander wirken, da die senkrecht hierzu wirkenden Scherkräfte durch die Matritzenverbindung aufgenommen werden.The additional fastening means only have to absorb forces which act in the direction of lifting the parts apart, since the shear forces acting perpendicularly to them are absorbed by the die connection.

Die Erfindung wird im folgenden anhand des in den Figuren dargestellten Ausführungsbeispieles näher erläutert.

  • Die Figuren 1, 2 und 3 zeigen in drei jeweils rechtwinklig zueinander stehenden teilweise geschnittenen Ansichten einen Winkel als Bestandteil eines Lagerbügels.
  • Die Figuren 4 und 5 zeigen gleichfalls in zwei senkrecht zueinander stehenden teilweise geschnittenen Ansichten einen aus zwei spiegelbildlichen Winkeln und Verbindungslaschen zusammengesetzten Lagerbügel mit Teilen eines Halters für mehrere Kontakthebel.
  • Die Figur 6 zeigt eine vollständige Kontaktanordnung eines Niderspannungs-Leistungsschalters in einer Seitenansicht.
  • Die Figur 7 zeigt die Kontaktanordnung gemäß der Figur 7 in einer Frontansicht.
The invention is explained below with reference to the embodiment shown in the figures.
  • FIGS. 1, 2 and 3 show an angle as part of a bearing bracket in three partially sectioned views which are each at right angles to one another.
  • Figures 4 and 5 also show in two mutually perpendicular partially sectioned views a bearing bracket composed of two mirror-image angles and connecting straps with parts of a holder for several contact levers.
  • FIG. 6 shows a complete contact arrangement of a low-voltage circuit breaker in a side view.
  • FIG. 7 shows the contact arrangement according to FIG. 7 in a front view.

Der in den Figuren 1, 2 und 3 gezeigte Winkel 1 dient zur Herstellung eines Lagerbügels, wie er in den Figuren 4 und 5 gezeigt ist. Der Winkel 1 besitzt einen Schenkel 2, der mit einer Durchgangsöffnung 3 für einen Lagerbolzen versehen ist. Ein weiterer, rechtwinklig zu dem Schenkel 2 stehender Schenkel 4 enthält gleichfalls eine Durchgangsöffnung 5, die zur Aufnahme einer im Verlauf der Herstellung des Lagerbügels einzusetzende Schraube vorgesehen ist. Aus der Ebene des Schenkels 4 ist ein Fortsatz 6 herausgebogen, der ebenfalls eine Durchgangsöffnung 7 besitzt. Der unterhalb des Fortsatzes 6 befindliche Teil des Schenkels 4 besitzt eine seitlich offene Ausnehmung 10, die beim Einbau des fertiggestellten Lagerbügels in ein Schaltgerät zur Befestigung dient.The angle 1 shown in FIGS. 1, 2 and 3 is used to produce a bearing bracket as shown in FIG 4 and 5 is shown. The angle 1 has a leg 2 which is provided with a through opening 3 for a bearing pin. Another leg 4 standing at right angles to leg 2 likewise contains a through opening 5 which is provided for receiving a screw to be used in the course of the manufacture of the bearing bracket. An extension 6, which also has a through opening 7, is bent out of the plane of the leg 4. The part of the leg 4 located below the extension 6 has a laterally open recess 10 which is used for fastening when the finished bearing bracket is installed in a switching device.

Ein vollständiger Lagerbügel 11, wie ihn die Figuren 4 und 5 zeigen, besteht aus einem Winkel 1 gemäß den Figuren 1, 2 und 3 sowie einem weiteren, vollkommen spiegelbildlich zu diesem Winkel gestalteten Winkel 1'; ferner werden Verbindungslaschen 12 in der Gestalt rechteckiger Blechstücke benötigt. Diese Teile, d. h. die Winkel 1 und 1' sowie die Verbindungslaschen 12 werden derart verbunden, daß der Abstand der Schenkel 2 und 2' der Winkel 1 und 1' mit möglichst geringer Toleranz der Breite d eines zur Aufnahme von Kontakthebeln dienenden Halters 12 entspricht. Zur Positionierung der Teile kann ein in Seitenwände 13 des Halters 12 eingreifender Lagerbolzen 14 benutzt werden, der im späteren Betrieb die Schwenkbewegung des Halters 12 zum Ein-und Ausschalten der Kontaktanordnung vorgesehen ist.A complete bearing bracket 11, as shown in FIGS. 4 and 5, consists of an angle 1 according to FIGS. 1, 2 and 3 as well as a further angle 1 ′ which is completely mirror-inverted to this angle; Furthermore, connecting straps 12 in the form of rectangular pieces of sheet metal are required. These parts, ie the angles 1 and 1 'and the connecting straps 12 are connected in such a way that the distance between the legs 2 and 2' of the angles 1 and 1 'corresponds to the smallest possible tolerance of the width d of a holder 12 used to hold contact levers. A bearing pin 14 which engages in side walls 13 of the holder 12 can be used to position the parts, and the pivoting movement of the holder 12 is provided in later operation for switching the contact arrangement on and off.

Wie insbesondere die Figur 5 zeigt, stehen sich die Schenkel 4 und 4' der Winkel 1 und 1' mit einem Abstand gegenüber. In sinngemäß der gleichen Stellung befinden sich die Fortsätze 6 und 6'. Zur Überbrückung dieser Teile dienen Verbindungslaschen 15 in Gestalt rechteckiger Blechstücke aus einem unmagnetischen Werkstoff, die mit jeweils zwei Durchgangsöffnungen 16 sowie zwei weiteren, außenliegenden größeren Durchgangsöffnungen 17 versehen sind. Durch eine plastische Verformung des Materials der Schenkel 4 und Fortsätze 6 wird nun Material in die Öffnungen 16 der Verbindungslaschen 15 hineingedrückt, wodurch eine formschlüssige Verbindung der Winkel 2 und der Verbindungslaschen 15 entsteht. Dieser Vorgang kann auf unterschiedliche Weise ausgeführt werden, da sowohl Handwerkzeuge als auch maschinelle Vorrichtungen benutzt werden können. Das Ergebnis der plastischen Verformung ist ein in die Öffnungen 16 hineinragender Zapfen der Schenkel 4 und 4' sowie der Fortsätze 6 und 6', welche die Winkel 1 und 1' in einem maßgerechten Abstand fixieren. Durch eine geeignete Bemessung der Öffnungen 16 und des Grades des plastischen Verformung läßt sich erreichen, daß die gebildeten Zapfen im späteren Betrieb der Kontaktanordnung auftretende Scherungskräfte vollständig aufnehmen können.As FIG. 5 in particular shows, the legs 4 and 4 'of the angles 1 and 1' face each other at a distance. The extensions 6 and 6 'are in the same position. To bridge these parts, connecting tabs 15 in the form of rectangular pieces of sheet metal made of a non-magnetic material are used, which are each provided with two through openings 16 and two further, outer, larger through openings 17. Due to a plastic deformation of the material of the legs 4 and extensions 6, material is now pressed into the openings 16 of the connecting straps 15, whereby a positive connection between the angles 2 and the connecting straps 15 is created. This process can be carried out in different ways, since both hand tools and machine devices can be used. The result of the plastic deformation is a pin of the legs 4 and 4 'and the extensions 6 and 6' which protrude into the openings 16 and which fix the angles 1 and 1 'at a dimensionally correct distance. By suitable dimensioning of the openings 16 and the degree of plastic deformation, it can be achieved that the pegs formed can completely absorb the shear forces that occur during later operation of the contact arrangement.

Die Durchgangsöffnungen 17 der Verbindungslaschen 15 fluchten jeweils mit den Durchgangsöffnungen 5 der Schenkel 4 bzw. 4' und der Durchgangsöffnungen 7 der Fortsätze 6 bzw. 6'. Durch das Einsetzen von Schrauben in diese fluchtenden Öffnungen werden die Teile des Lagerbügels 11 dauerhaft verbunden, wobei die Schrauben lediglich den Zusammenhalt der Teile sicherstellen, nicht jedoch die auftretenden Scherungskräfte übemehmen oder die Maßgenauigkeit des Lagerbügels 11 bestimmen. Anstelle der Schrauben können andere Befestigungsmittel eingesetzt werden, z. B. Niete, oder es kann eine Punktschweißung oder ein ähnliches Verfahren benutzt werden. Schrauben haben im vorliegenden Fall den Vorteil, daß der Lagerbügel zerlegbar ist, da auch die Matritzenverbindung durch geeignete Werkzeuge getrennt werden kann.The through openings 17 of the connecting straps 15 are aligned with the through openings 5 of the legs 4 and 4 'and the through openings 7 of the extensions 6 and 6', respectively. By inserting screws into these aligned openings, the parts of the bearing bracket 11 are permanently connected, the screws merely ensuring the cohesion of the parts, but not taking over the shear forces that occur or determining the dimensional accuracy of the bearing bracket 11. Instead of the screws, other fasteners can be used, e.g. B. rivets, or spot welding or a similar method can be used. In the present case, screws have the advantage that the bearing bracket can be dismantled, since the die connection can also be separated by suitable tools.

Es ist auch möglich, anstelle der plastischen Verformung in Verbindung mit den als verlorene Matritze wirkenden Verbindungslaschen 15 andere Verfahren und Hilfsmittel zu benutzen. Beispielsweise können Verbindungslasche ohne Matritzenlöscher verwendet werden, und es können in der maßgerecht positionierten Stellung der Teile Durchgangsbohrungen angebracht werden, in die geeignete Verbindungsmittel, z. B. Kerbstifte eingefügt werden. In ähnlicher Weise können Niete benutzt werden, um sowohl die vorübergehende und die Scherungskräfte übertragende Verbindung als auch eine dauerhafte und unlösbare Verbindung herzustellen. In diesem Fall, ebenso wie bei örtlicher Verschweissung der Teile, besteht jedoch keine Möglichkeit, den Lagerbügel wieder zu zerlegen, falls dies unmittelbar anschließend an die erstmalige Verbindung oder später, z. B. bei einer Reperatur eines Leistungsschalters, erwünscht ist.It is also possible to use other methods and aids instead of the plastic deformation in connection with the connecting straps 15 acting as a lost die. For example, connecting lugs can be used without die extinguisher, and through holes can be made in the correctly positioned position of the parts, into which suitable connecting means, e.g. B. Grooved pins can be inserted. Similarly, rivets can be used to create both the temporary and shear link as well as a permanent and permanent connection. In this case, as well as when the parts are welded locally, there is no possibility of disassembling the bearing bracket again if this occurs immediately after the initial connection or later, e.g. B. at a repair of a circuit breaker is desired.

Die Verwendung der in den Figuren 4 und 5 gezeigten Anordnung wird nun anhand der Figuren 6 und 7 erläutert. In diesen Figuren ist eine Kontaktanordnung 20 für einen Niederspannungs-Leistungsschalter gezeigt, die einen feststehenden Teil 21 und einen bewegbaren Teil 22 umfaßt. Der bewegbare Teil 21 weist einen Isolierstoffblock 23 auf, der eine obere Anschlußschiene 24 und eine untere gegabelte Anschlußschiene 25 trägt. Mit der oberen Anschlußshiene in leitender Verbindung steht ein ortsfester Kontaktkörper 26 mit einer Schaltstückauflage 27 sowie ein Abbrennkontaktkörper 31 mit einer weiteren Schaltstückauflage 32 und einem Lichtbogenhom 33. Mit der unteren Anschlußschiene 25 sind biegsame Strombänder 34 verbunden, die zu zwei außenliegenden Hauptkontakthebeln 35 und einem mittleren Abbrennkontakthebel 36 führen. Die beiden äußeren Kontakthebel 35 besitzen Schaltstückauflagen 37, während der mittlere Kontakthebel 36 einen bewegbaren Abbrennkontaktkörper 40 mit einer Schaltstückauflage 41 besitzt. Femer steht mit dem Abbrennkontaktkörper 40 ein Lichtbogenhorn 42 in Verbindung. Die Kontakthebel 35 und 36 sind um einen Gelenkbolzen 43 schwenkbar und stehen unter dem Einfluß von Druckfedem, die in bekannter Weise zwischen den Schenkeln der Strombänder 34 angeordnet sind.The use of the arrangement shown in FIGS. 4 and 5 will now be explained with reference to FIGS. 6 and 7. In these figures, a contact arrangement 20 for a low-voltage circuit breaker is shown, which comprises a fixed part 21 and a movable part 22. The movable part 21 has an insulating block 23 which carries an upper connecting bar 24 and a lower forked connecting bar 25. A stationary contact body 26 with a contact piece support 27 as well as a burn-off contact body 31 with a further contact piece support 32 and an electric arc 33 are connected to the upper connecting bar in a conductive connection Guide the burn contact lever 36. The two outer contact levers 35 have contact piece supports 37, while the middle contact lever 36 has a movable burn-off contact body 40 with a contact piece support 41. An arcing horn 42 is also connected to the burn-off contact body 40. The contact levers 35 and 36 are pivotable about a hinge pin 43 and are under the influence of compression springs, which are arranged in a known manner between the legs of the current strips 34.

Die Kontakthebel 35 und 36 befinden sich in einem Halter 44, der in seinem Aufbau dem Halter 13 in den Figuren 4 und 5 entspricht, jedoch eine etwas andere Formgebung seiner Seitenteile 45 aufweist. Die Seitenteile 45 nehmen außer dem Gelenkbolzen 43 einen Lagerbolzen 46 sowie einen Kupplungsbolzen 47 auf. Hierbei sient der Lagerbolzen 46 als Schwenklager des bewegbaren Teiles 22 der Kontaktanordnung 1 um einem im Prinzip dem Lagerbügel 11 in den Figuren 5 und 6 entsprechenden lagerbügel 50, der an dem isolierstoffblock 23 befestogt ist. An dem Kupplungsbolzen 47 greifen isolierende Koppelorgane 51 an, die mit einer geeigneten Antriebsvorrichtung des Leistungsschalter verbunden sind. Die Seitenwände 45 des Halters 44 werden in dem durch die Kontakthebel 35 und 36 sowie zwischen diesem befindlichen Zwishenlagen 52 bedingten Abstand durch zwei oder mehrere Bolzen 53 gehalten. Aufgrund der bekannten Einflüsse kann die Breite des Hatters daher unterschiedlich sein. An dieses Breitenmasß ist der Lagerbügel in der beschreibenen Weise angepaßt, so daß auch bei serienmäßiger Herstellung von Kontaktanordnungen individuelle Maßabweichungen grundsätzlich berücksichtigt werden. alle Kontaktanordnungen besitzen somit eine praktisch erreichbare geringstmögliche seitliche Führungstoleranz.The contact levers 35 and 36 are located in a holder 44, which corresponds in its construction to the holder 13 in FIGS. 4 and 5, but has a somewhat different shape of its side parts 45. In addition to the hinge pin 43, the side parts 45 receive a bearing pin 46 and a coupling pin 47. Here, the bearing pin 46 serves as a pivot bearing of the movable part 22 of the contact arrangement 1 around the bearing bracket in principle 11 in Figures 5 and 6 corresponding bearing bracket 50 which is attached to the insulating block 23. Insulating coupling members 51, which are connected to a suitable drive device of the circuit breaker, engage on the coupling bolt 47. The side walls 45 of the holder 44 are held by two or more bolts 53 at a distance caused by the contact levers 35 and 36 and between the intermediate layers 52 located between them. Because of the known influences, the width of the hatter can therefore vary. The bearing bracket is adapted to this width dimension in the manner described, so that individual dimensional deviations are always taken into account even in the case of series production of contact arrangements. all contact arrangements thus have a practically achievable lowest possible lateral guiding tolerance.

In dem in den Figuren 6 und 7 gezeigten Beispiel greifen zwischen die Seitenwände 45 des Halters 44 und den Lagerbügel Stützwinkel 54 für die Strombänder 34 ein. Diese Winkel haben jedoch keinen Einfluß auf das Zusammenwirken des Lagerbügels 50 mit dem Halter 44, da diese Teile mit aufeinander zuweisenden Einprägungen 55 bzw. 56 versehen sind, die als Führungsflächen dienen. Aufgrung der Einprägungen 55 und 56 ergibt sich ein Abstand zwischen den Seitenwänden 45 des Halters 44 und dem Lagerbügel 50, der in jedem Fall größer als die Dicke der Stützwinkel 54 ist.In the example shown in FIGS. 6 and 7, support brackets 54 for the current strips 34 engage between the side walls 45 of the holder 44 and the bearing bracket. However, these angles have no influence on the interaction of the bearing bracket 50 with the holder 44, since these parts are provided with facing impressions 55 and 56, which serve as guide surfaces. Due to the impressions 55 and 56, there is a distance between the side walls 45 of the holder 44 and the bearing bracket 50, which is in any case greater than the thickness of the support bracket 54.

Claims (6)

1. Contact arrangement (20) having a plurality of contact levers (35, 36) which are mounted in a holder (44; 12) to be pivotable relatively to one another, the holder (44; 12) itself being movable about a stationary bearing (46; 14) for switching on and switching off, characterised in that the bearing is constructed as a bearing bracket (50; 11) which extends about the holder (44; 12) and which is composed of parts (1, 1', 15) connected to one another at an invariable spacing (d) adapted to the holder (44; 12).
2. Contact arrangement according to claim 1, characterised in that the bearing bracket (50, 11) has two angle elements (1, 1') which are constructed in mirror-image form and one leg (2, 2') of which is arranged parallel to side walls (13) of the holder (12) and further legs (4, 4') of which are directed towards one another, the further legs (4, 4') being connected at a dimensionally correct spacing by applied connecting straps (15) (Figs. 1, 2, 3, 4).
3. Contact arrangement according to claim 2, characterised in that the connecting straps (15) are provided, for use as a matrix, with apertures (16) into which, by plastic deformation, material from the one legs (2) of the angle elements (1, 1') can be pressed.
4. Contact arrangement according to claim 3, characterised in that the apertures (16) of the connecting straps (15) are dimensioned for a material cross-section sufficient for the complete transmission of stresses produced by current forces.
5. Contact arrangement according to claim 2, characterised in that the connecting straps (15) are made of a non-magnetic material.
6. Method of producing a contact arrangement according to one of the preceding claims, characterised by the following steps:
a) the angle elements (1, 1') are positioned in dimensionally true manner at the two sides of the holder;
b) The connecting straps (15) are applied to the further legs (4, 4') of the angle elements;
c) the further legs (4, 4') are plastically deformed locally to such an extent by pressure application by means of a tool that material enters the apertures (16) of the connecting straps, and as a result the angle elements are connected to one another at a spacing adapted to the holder (13);
d) the angle elements (1, 1') and the connecting straps (15) are permanently connected by additional securing elements.
EP86730162A 1985-11-07 1986-10-20 Contact arrangement with contact levers mounted in a holder in pivotal relationship to each other Expired - Lifetime EP0222685B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3539786 1985-11-07
DE19853539786 DE3539786A1 (en) 1985-11-07 1985-11-07 CONTACT ARRANGEMENT WITH CONTACT LEVERS RELATIVELY SWIVELED IN A HOLDER

Publications (2)

Publication Number Publication Date
EP0222685A1 EP0222685A1 (en) 1987-05-20
EP0222685B1 true EP0222685B1 (en) 1990-02-07

Family

ID=6285559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86730162A Expired - Lifetime EP0222685B1 (en) 1985-11-07 1986-10-20 Contact arrangement with contact levers mounted in a holder in pivotal relationship to each other

Country Status (4)

Country Link
US (1) US4719325A (en)
EP (1) EP0222685B1 (en)
JP (1) JPH0746543B2 (en)
DE (2) DE3539786A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29615566U1 (en) 1996-08-28 1998-01-02 Siemens AG, 80333 München Movable switching contact arrangement with a contact lever receiving contact lever carrier
US6005206A (en) * 1998-05-07 1999-12-21 Eaton Corporation Electrical switching apparatus with improved contact arm carrier arrangement
US6072136A (en) * 1998-05-07 2000-06-06 Eaton Corporation Electrical switching apparatus with modular operating mechanism for mounting and controlling large compression close spring
DE10012605A1 (en) 2000-03-09 2001-09-13 Siemens Ag Switch-pole unit for low-voltage (LV) switchgear, such as LV circuit-breakers - includes additional terminal rail running through rear wall of box-shaped housing of switch-pole unit and connecting with hinged contact mounted on shaft
DE10062761A1 (en) * 2000-12-13 2002-06-20 Siemens Ag Movable contact carrier for holding contact levers for low-voltage circuit breakers
US7368677B2 (en) * 2005-12-14 2008-05-06 Eaton Corporation Reverse bias hatchet reset spring

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402274A (en) * 1965-10-01 1968-09-17 Square D Co Contact structure for a power circuit breaker
US3770922A (en) * 1972-07-27 1973-11-06 Ite Imperial Corp Circuit breaker contact structure
JPS5820442B2 (en) * 1976-12-30 1983-04-23 ウエスチングハウス エレクトリック コ−ポレ−ション Shiya disconnector
JPS576140U (en) * 1980-06-10 1982-01-13
JPS58165961U (en) * 1982-04-30 1983-11-05 富士電機株式会社 circuit break

Also Published As

Publication number Publication date
JPH0746543B2 (en) 1995-05-17
DE3539786A1 (en) 1987-05-14
DE3669010D1 (en) 1990-03-15
EP0222685A1 (en) 1987-05-20
US4719325A (en) 1988-01-12
JPS62110209A (en) 1987-05-21

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