EP1360709A1 - Switching contact arrangement - Google Patents

Switching contact arrangement

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Publication number
EP1360709A1
EP1360709A1 EP02708231A EP02708231A EP1360709A1 EP 1360709 A1 EP1360709 A1 EP 1360709A1 EP 02708231 A EP02708231 A EP 02708231A EP 02708231 A EP02708231 A EP 02708231A EP 1360709 A1 EP1360709 A1 EP 1360709A1
Authority
EP
European Patent Office
Prior art keywords
contact
spring
lever
switching
contact force
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.)
Granted
Application number
EP02708231A
Other languages
German (de)
French (fr)
Other versions
EP1360709B1 (en
Inventor
Günter Seidler
Detlev Schmidt
Sezai TÜRKMEN
Michael Sebekow
Michael Bach
Ingo Thiede
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1360709A1 publication Critical patent/EP1360709A1/en
Application granted granted Critical
Publication of EP1360709B1 publication Critical patent/EP1360709B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • 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
    • H01H1/225—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 the supporting member being pivotable
    • 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 present invention relates to a switching contact arrangement with a contact carrier and a contact lever which is articulated on the contact carrier about a pivot point and with a contact force spring designed as a leaf spring for pressing the contact lever against a mating contact.
  • a switch contact arrangement of this type has become known as part of a low-voltage circuit breaker through US Pat. No. 5,517,164.
  • the contact force acting on the switching contacts of circuit breakers is applied in that the mentioned contact force springs are tensioned during switching on. This is done by means of a drive device belonging to the circuit breaker, the switching path of which is essentially constant over the intended service life of the circuit breaker. In contrast, the travel of the contact lever increases as a result of the erosion of the switching contacts, as a result of which the contact force decreases in accordance with the erosion. If it is to be ensured that a sufficient contact force is achieved even at the end of the service life of a switch contact arrangement, a corresponding dimensioning of the contact force springs can lead to an undesirably high contact force when the switch contact arrangement is new. This results in a correspondingly high energy requirement for the drive device.
  • the present invention has for its object to provide a circuit breaker in which the contact force depends less on the erosion of the contacts.
  • This object is achieved by the invention in a switch contact arrangement of the type mentioned at the outset in that the contact force spring is arranged in a rocker-like manner such that the ends of the contact force spring rest on the contact lever and a pivot bearing of the contact force spring is arranged between the pivot point of the contact lever and its contacting end part ,
  • the contact force of the switch contact arrangement according to the invention does not follow the known characteristic of a helical compression spring or a one-armed leaf spring according to the cited US Pat. No. 5,517,164. Rather, the dependence on contact erosion is largely reduced and can be largely eliminated by optimizing the geometry.
  • the contact force is essentially determined by a suitable choice of the preload. This also eliminates the need to oversize the contact force spring and the drive device, which has a favorable effect on the service life of the circuit breaker.
  • the pivot bearing of the contact force spring can preferably be moved along a sliding surface on the contact carrier without a fixed connection to the contact carrier depending on the respective spring force. Due to the non-stationary storage, the bearing point of the leaf spring arrangement changes depending on the position of the contact lever.
  • the pivot bearing of the contact force spring is formed by a kink of the contact force spring which bears on the essentially flat sliding surface on the contact carrier.
  • one end of the contact force spring is bent to form an abutment of the contact force spring and a recess is arranged on the contact lever for receiving the bent end.
  • the design of a switch contact arrangement according to the invention is particularly suitable for circuit breakers with a high rated current which have a plurality of contact levers in each pole.
  • the manufacture and assembly of the corresponding number of contact force springs can be simplified in that the contact force springs of all contact levers are part of a one-piece leaf spring.
  • FIG. 1 shows a switch contact arrangement with several contact levers, partly in a section II-II in FIG. 2.
  • Figure 2 shows the switching contact arrangement according to Figure 1 with a view of the parallel contact lever.
  • FIG. 3 is a detail of the switch contact arrangement according to FIGS. 1 and 2, shown on an enlarged scale.
  • Figures 4, 5 and 6 show a further embodiment in representations corresponding to Figures 1, 2 and 3.
  • FIG. 7 shows a leaf spring, which has contact force springs for several contact levers, in a perspective view.
  • the switch contact arrangement shown in FIGS. 1, 2 and 3 comprises a contact carrier 1, which is mounted in a pivot bearing (not shown) by means of bearing pins 12.
  • Contact levers 2 are connected to the contact carrier 1 in an articulated manner about a pivot point 11.
  • the contact levers 2 have a contact-making end part 18 and are connected in an electrically conductive manner to a lower connecting bar 4 at the opposite end by only indicated flexible conductors 13.
  • rocker-like contact force springs 8 which are therefor ensure that the contact-making end parts 18 of the contact levers 2, when the switch contact arrangement is switched on, have sufficient contact force against a mating contact 5 which carries an arcing horn 3.
  • the mating contact 5 can be formed by one end of an upper connecting rail arranged parallel to the lower connecting rail 4.
  • FIG. 1 also schematically shows a drive device 6 known per se, which acts on the contact carrier 1 by means of a lever chain 7 and brings it into the on or off position.
  • a drive device 6 known per se, which acts on the contact carrier 1 by means of a lever chain 7 and brings it into the on or off position.
  • the modules mentioned form a low-voltage circuit breaker 22, as is indicated by a dash-dotted frame.
  • the contact force springs 8 of the individual contact levers 2 can be individual parts designed as leaf springs, but are part of a coherent, ie one-part leaf spring. As can be seen in more detail in FIGS. 1 and 3, the contact force springs 8 have an approximately centrally arranged bend 20 which, together with a sliding surface 19 formed on the contact carrier 1, forms a pivot bearing 10. The position of the pivot bearing 10 between the fulcrum 11 of the contact lever 2 and an upper end leg 14 of the contact force spring 8 is essential for the desired function of the switch contact arrangement 14 rests on the opposite end of the contact force spring 8 on the contact lever 2 approximately where the pivot point 11 is located.
  • This arrangement has the property that the contact force between the contacting end part 18 and the mating contact 5 is largely independent. is dependent on the relative position of the contact lever 2 to the contact carrier 1. Accordingly, the influence of the erosion of the interacting contact points on the size of the contact force is small.
  • the position of the upper angled end part 14 of the contact force spring 8 is essential given the dimensions and properties of the interacting parts.
  • a slide connector 9 attached to the contact carrier 2 is provided.
  • the pivot bearing 10 of the leaf spring arrangement 8 can move freely along the sliding surface 19 without a fixed connection to the contact carrier 1 and, depending on the tension of the contact force spring 8, is only limited by the sliding sleeve 9 serving as an abutment.
  • rocker-like contact force spring 8 shown is located in the space between the side of the contact lever 2 facing away from the contacts and the contact carrier 1 and is thereby protected against the effects of switching arcs.
  • FIGS. 4 to 7 differs in the features described below from those of the example shown in FIGS. 1 to 3. With regard to the remaining configuration, reference is made to the description of the embodiment according to FIGS. 1 to 3.
  • the slide 9 serves as a means for positioning the rocker-like contact force spring 8
  • the upper end leg 14 angled in the direction of the contact lever.
  • the contact levers 2 are provided with a recess 15, in which the end leg 14 engages.
  • the contact force springs 8 are aligned with the associated contact levers.
  • the desired contact force is achieved by installing the contact force springs 8 in the switching contact arrangement with a specific pretension.
  • FIGS. 5 and 7. 5 shows that the leaf spring 23 lies behind the contact levers.
  • the assembly is simple and can be carried out, for example, in such a way that the leaf spring 23 is pressed into the intermediate space after the contact carrier 1 and contact levers 2 have been joined until the angled end parts 14 snap into the recesses 25.
  • the contact force is increased to a desired value only shortly before the end position of the contact lever when switching on. To achieve this goal, as can be clearly seen in FIGS. 4 and 6, on the contact carrier 1 and on the contact lever 2
  • Projections 16 and 17 are provided, which are offset from one another and are arranged such that the spring force is increased towards the end of the switch-on movement. LIST OF REFERENCE NUMBERS

Landscapes

  • Contacts (AREA)
  • Tumbler Switches (AREA)
  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)

Abstract

The invention relates to a switching contact, wherein a rocker-type leaf spring is used as a contact force spring (8) in order to produce the contact force required for a contact lever (2), the drag bearing (10) thereof being disposed between the point of rotation (11) of the contact lever (2) on a contact carrier (1) and a contact-making end piece (18) of the contact lever (2). Preferably, the drag bearing (10) is formed by a bend of the contact force spring (8) and a sliding surface (19) disposed on the contact carrier (1). The drag bearing (10) of the contact force spring (8) can be displaced without a fixed link along the sliding surface (19) according to the tension of the contact force spring (8). If the switching contact arrangement has several contact levers (multiple contact arrangement) all of the associated contact force springs can be combined to form a one-piece leaf spring (23).

Description

Beschreibungdescription
SchaltkontaktanordnungSwitching contact arrangement
Die vorliegende Erfindung betrifft eine Schaltkontaktanordnung mit einem Kontaktträger und einem an dem Kontaktträger um einen Drehpunkt gelenkig bewegbaren Kontakthebel sowie mit einer als Blattfeder ausgebildeten Kontaktkraftfeder zum Anpressen des Kontakthebels an einen Gegenkontakt.The present invention relates to a switching contact arrangement with a contact carrier and a contact lever which is articulated on the contact carrier about a pivot point and with a contact force spring designed as a leaf spring for pressing the contact lever against a mating contact.
Eine Schaltkontaktanordnung dieser Art ist als Bestandteil eines Niederspannungs-Leistungsschalters durch die US- Patentschrift 5,517,164 bekannt geworden.A switch contact arrangement of this type has become known as part of a low-voltage circuit breaker through US Pat. No. 5,517,164.
Die auf die Schaltkontakte von Leistungsschaltern wirkende Kontaktkraft wird dadurch aufgebracht, dass die erwähnten Kontaktkraftfedern während des Einschaltens gespannt werden. Dies geschieht durch eine zu dem Leistungsschalter gehörende Antriebsvorrichtung, deren Schaltweg über die vorgesehene Le- bensdauer des Leistungsschalters im wesentlichen konstant ist. Demgegenüber vergrößert sich durch Abbrand der Schalt- kontakte der Weg der Kontakthebel, wodurch die Kontaktkraft entsprechend dem Abbrand abnimmt. Soll sichergestellt sein, dass auch gegen Ende der Lebensdauer einer Schaltkontaktan- Ordnung eine ausreichende Kontaktkraft erzielt wird, so kann eine entsprechende Bemessung der Kontaktkraftfedern zu einer unerwünscht hohen Kontaktkraft im Neuzustand der Schaltkontaktanordnung führen. Dies hat einen entsprechend hohen Energiebedarf der Antriebsvorrichtung zur Folge.The contact force acting on the switching contacts of circuit breakers is applied in that the mentioned contact force springs are tensioned during switching on. This is done by means of a drive device belonging to the circuit breaker, the switching path of which is essentially constant over the intended service life of the circuit breaker. In contrast, the travel of the contact lever increases as a result of the erosion of the switching contacts, as a result of which the contact force decreases in accordance with the erosion. If it is to be ensured that a sufficient contact force is achieved even at the end of the service life of a switch contact arrangement, a corresponding dimensioning of the contact force springs can lead to an undesirably high contact force when the switch contact arrangement is new. This results in a correspondingly high energy requirement for the drive device.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Leistungsschalter anzugeben, bei dem die Kontaktkraft weniger stark vom Abbrand der Kontakte abhängt . Durch die Erfindung wird diese Aufgabe bei einer Schaltkontaktanordnung der eingangs genannten Art dadurch gelöst, dass die Kontaktkraftfeder wippenartig schwenkbar angeordnet ist, derart, dass die Enden der Kontaktkraftfeder am Kontakthebel anliegen und ein Schwenklager der Kontaktkraftfeder zwischen dem Drehpunkt des Kontakthebels und seinem kontaktgebenden Endteil angeordnet ist.The present invention has for its object to provide a circuit breaker in which the contact force depends less on the erosion of the contacts. This object is achieved by the invention in a switch contact arrangement of the type mentioned at the outset in that the contact force spring is arranged in a rocker-like manner such that the ends of the contact force spring rest on the contact lever and a pivot bearing of the contact force spring is arranged between the pivot point of the contact lever and its contacting end part ,
Die Kontaktkraft der erfindungsgemäßen Schaltkontaktanordnung folgt nicht der bekannten Charakteristik einer Schrauben- Druckfeder oder einer einarmigen Blattfeder nach der genannten US 5,517,164. Vielmehr ist die Abhängigkeit vom Kontaktabbrand weitgehend reduziert und kann durch optimierte Ausle- gung der Geometrie weitgehend beseitigt werden. Die Festlegung der Kontaktkraft erfolgt im wesentlichen durch geeignete Wahl der Vorspannung. Damit entfällt auch die Notwendigkeit der Überdimensionierung der Kontaktkraftfeder und der Antriebsvorrichtung, was die Lebensdauer des Leistungsschalters günstig beeinflusst.The contact force of the switch contact arrangement according to the invention does not follow the known characteristic of a helical compression spring or a one-armed leaf spring according to the cited US Pat. No. 5,517,164. Rather, the dependence on contact erosion is largely reduced and can be largely eliminated by optimizing the geometry. The contact force is essentially determined by a suitable choice of the preload. This also eliminates the need to oversize the contact force spring and the drive device, which has a favorable effect on the service life of the circuit breaker.
Vorzugsweise ist das Schwenklager der Kontaktkraftfeder ohne feste Verbindung mit dem Kontaktträger in Abhängigkeit von der jeweiligen Federkraft entlang einer am Kontaktträger be- findlichen Gleitfläche beweglich ist. Durch die nicht ortsgebundene Lagerung verändert sich der Lagerpunkt der Blattfederanordnung in Abhängigkeit von der Position des Kontakthebels .The pivot bearing of the contact force spring can preferably be moved along a sliding surface on the contact carrier without a fixed connection to the contact carrier depending on the respective spring force. Due to the non-stationary storage, the bearing point of the leaf spring arrangement changes depending on the position of the contact lever.
Es erweist sich als vorteilhaft, wenn das Schwenklager der Kontaktkraftfeder durch einen an der im wesentlichen ebenen Gleitfläche am Kontaktträger anliegenden Knick der Kontakt- kraftfeder gebildet ist. Um trotz des relativ zum Kontaktträger verschiebbaren Schwenklagers der Kontaktkraftfeder eine definierte Kraftwirkung sicherzustellen, empfiehlt es sich, die relative Bewe- gung der Kontaktkraftfeder zum Kontakthebel einzuschränken oder auf einen bestimmten Punkt zu beziehen. Dies kann dadurch erreicht werden, dass als Widerlager der Kontaktkraftfeder ein am Kontaktträger sitzender Gleitbutzen vorgesehen ist. Gleichfalls als gut geeignet erweist es sich, wenn zur Bildung eines Widerlagers der Kontaktkraftfeder ein Ende derselben abgebogen ist und zur Aufnahme des abgebogenen Endes am Kontakthebel eine Ausnehmung angeordnet ist.It proves to be advantageous if the pivot bearing of the contact force spring is formed by a kink of the contact force spring which bears on the essentially flat sliding surface on the contact carrier. In order to ensure a defined force effect despite the swivel bearing of the contact force spring which can be displaced relative to the contact carrier, it is advisable to restrict the relative movement of the contact force spring to the contact lever or to relate it to a specific point. This can be achieved in that a sliding slug seated on the contact carrier is provided as the abutment of the contact force spring. It also proves to be very suitable if one end of the contact force spring is bent to form an abutment of the contact force spring and a recess is arranged on the contact lever for receiving the bent end.
Wie einleitend erwähnt, gehört es zum Anliegen der Erfindung, den Energiebedarf zur Betätigung der Schaltkontaktanordnung eines Leistungsschalters gering zu halten. Hierzu kann dadurch beigetragen werden, dass am Kontaktträger und am Kontakthebel versetzt einander gegenüberstehende Vorsprünge vorgesehen sind in einer derartigen Anordnung, dass die Feder- kraft beim Einschalten der Schal kontaktanordnung gegen Ende der Einschaltbewegung ansteigt. Dies hat zur Folge, dass die von einer Antriebsvorrichtung zu liefernde Antriebskraft bei der Berührung der Kontakthebel mit ihrem Gegenkontakt weniger steil ansteigt und bereits vorhandene kinetische Energie ge- nutzt werden kann, die benötigte Spannung der Kontaktkraftfedern im eingeschalteten Zustand der Schaltkontaktanordnung zu erreichen.As mentioned in the introduction, it is part of the object of the invention to keep the energy requirement for actuating the switch contact arrangement of a circuit breaker low. This can be contributed to by the fact that mutually opposite projections are provided on the contact carrier and on the contact lever in such an arrangement that the spring force increases when the scarf contact arrangement is turned towards the end of the switch-on movement. The consequence of this is that the drive force to be supplied by a drive device rises less steeply when the contact lever touches its mating contact, and kinetic energy which is already available can be used to achieve the required voltage of the contact force springs when the switch contact arrangement is switched on.
Die erfindungsgemäße Ausbildung eines Schaltkontaktanordnung ist besonders für Leistungsschalter mit hohem Nennstrom geeignet, die in jedem Pol mehrere Kontakthebel aufweisen. Die Herstellung und die Montage der entsprechenden Anzahl von Kontaktkraftfedern können dadurch vereinfacht werden, dass die Kontaktkraftfedern aller Kontakthebel Bestandteil einer einteiligen Blattfeder sind.The design of a switch contact arrangement according to the invention is particularly suitable for circuit breakers with a high rated current which have a plurality of contact levers in each pole. The manufacture and assembly of the corresponding number of contact force springs can be simplified in that the contact force springs of all contact levers are part of a one-piece leaf spring.
Im Folgenden wird die Erfindung anhand in den Figuren darge- stellter Ausführungsbeispiele näher erläutert.The invention is explained in more detail below on the basis of exemplary embodiments illustrated in the figures.
Figur 1 zeigt eine Schaltkontaktanordnung mit mehreren Kontakthebeln teilweise in einem Schnitt II-II in Figur 2.FIG. 1 shows a switch contact arrangement with several contact levers, partly in a section II-II in FIG. 2.
Figur 2 zeigt die Schaltkontaktanordnung gemäß der Figur 1 mit Blick auf die parallelen Kontakthebel.Figure 2 shows the switching contact arrangement according to Figure 1 with a view of the parallel contact lever.
Figur 3 ist eine in vergrößertem Maßstab gezeigte Einzelheit der Schaltkontaktanordnung gemäß den Figuren 1 und 2.FIG. 3 is a detail of the switch contact arrangement according to FIGS. 1 and 2, shown on an enlarged scale.
Die Figuren 4, 5 und 6 zeigen ein weiteres Ausführungsbeispiel in Darstellungen, die den Figuren 1, 2 und 3 entsprechen.Figures 4, 5 and 6 show a further embodiment in representations corresponding to Figures 1, 2 and 3.
Figur 7 zeigt eine Blattfeder, die Kontaktkraftfedern für mehrere Kontakthebel aufweist, in einer perspektivischen Darstellung.FIG. 7 shows a leaf spring, which has contact force springs for several contact levers, in a perspective view.
Der in den Figuren 1, 2 und 3 dargestellte Schaltkontaktan- Ordnung umfasst einen Kontaktträger 1, der in einem nicht dargestellten Schwenklager mittels Lagerzapfen 12 gelagert ist. Kontakthebel 2 sind mit dem Kontaktträger 1 gelenkig um einen Drehpunkt 11 verbunden. Die Kontakthebel 2 besitzen einen kontaktgebenden Endteil 18 und sind am gegenüberliegenden Ende durch lediglich angedeutete biegsame Leiter 13 elektrisch leitend mit einer unteren Anschlussschiene 4 verbunden. Zwischen dem Kontaktträger 1 und den Kontakthebeln 2 befinden sich wippenartig gelagerte Kontaktkraftfedern 8, die dafür sorgen, dass die kontaktgebenden Endteile 18 der Kontakthebel 2 im eingeschalteten Zustand der Schaltkontaktanordnung mit ausreichender Kontaktkraft an einem Gegenkontakt 5 anliegen, der ein Lichtbogenhorn 3 trägt . In bekannter Weise kann der Gegenkontakt 5 durch ein Ende einer parallel zur unteren Anschlussschiene 4 angeordnete obere Anschlussschiene gebildet sein.The switch contact arrangement shown in FIGS. 1, 2 and 3 comprises a contact carrier 1, which is mounted in a pivot bearing (not shown) by means of bearing pins 12. Contact levers 2 are connected to the contact carrier 1 in an articulated manner about a pivot point 11. The contact levers 2 have a contact-making end part 18 and are connected in an electrically conductive manner to a lower connecting bar 4 at the opposite end by only indicated flexible conductors 13. Between the contact carrier 1 and the contact levers 2 there are rocker-like contact force springs 8, which are therefor ensure that the contact-making end parts 18 of the contact levers 2, when the switch contact arrangement is switched on, have sufficient contact force against a mating contact 5 which carries an arcing horn 3. In a known manner, the mating contact 5 can be formed by one end of an upper connecting rail arranged parallel to the lower connecting rail 4.
In der Figur 1 ist ferner schematisch eine an sich bekannte Antriebsvorrichtung 6 gezeigt, die mittels einer Hebelkette 7 auf den Kontaktträger 1 wirkt und diesen in die Ein- bzw. Ausschaltstellung bringt. Zusammen mit nicht gezeigten Schutz- und Steuereinrichtungen bilden die genannten Baugruppen einen Niederspannungs-Leistungsschalter 22, wie durch ei- nen strichpunktierten Rahmen angedeutet ist .FIG. 1 also schematically shows a drive device 6 known per se, which acts on the contact carrier 1 by means of a lever chain 7 and brings it into the on or off position. Together with protection and control devices (not shown), the modules mentioned form a low-voltage circuit breaker 22, as is indicated by a dash-dotted frame.
Die Kontaktkraftfedern 8 der einzelnen Kontakthebel 2 können zwar einzelne, als Blattfeder ausgebildete Teile sein, sind aber Bestandteil einer zusammenhängenden, d. h. einteiligen Blattfeder. Wie näher den Figuren 1 und 3 zu entnehmen ist, besitzen die Kontaktkraftfedern 8 einen etwa mittig angeordneten Knick 20, der zusammen mit einer am Kontaktträger 1 ausgebildeten Gleitfläche 19 ein Schwenklager 10 bildet. Wesentlich für die gewünschte Funktion der Schaltkontaktanord- nung ist die Lage des Schwenklagers 10 zwischen dem Drehpunkt 11 des Kontakthebels 2 und einem oberen Endschenkel 14 der Kontaktkraftfeder 8. Dieser Endschenkel 14 liegt am kontaktgebenden Endteil 18 des Kontakthebels 2 an, während ein etwa gleich geformter Endschenkel 14 am gegenüberliegenden Ende der Kontaktkraftfeder 8 an dem Kontakthebel 2 etwa dort anliegt, wo sich der Drehpunkt 11 befindet. Diese Anordnung hat die Eigenschaft, dass die Kontaktkraft zwischen dem kontakt- gebenden Endteil 18 und dem Gegenkontakt 5 weitgehend unab- hängig von der relativen Position der Kontakthebel 2 zu dem Kontaktträger 1 ist. Dementsprechend ist der Einfluss des Abbrand der zusammenwirkenden Kontaktstellen auf die Größe der Kontaktkraft gering.The contact force springs 8 of the individual contact levers 2 can be individual parts designed as leaf springs, but are part of a coherent, ie one-part leaf spring. As can be seen in more detail in FIGS. 1 and 3, the contact force springs 8 have an approximately centrally arranged bend 20 which, together with a sliding surface 19 formed on the contact carrier 1, forms a pivot bearing 10. The position of the pivot bearing 10 between the fulcrum 11 of the contact lever 2 and an upper end leg 14 of the contact force spring 8 is essential for the desired function of the switch contact arrangement 14 rests on the opposite end of the contact force spring 8 on the contact lever 2 approximately where the pivot point 11 is located. This arrangement has the property that the contact force between the contacting end part 18 and the mating contact 5 is largely independent. is dependent on the relative position of the contact lever 2 to the contact carrier 1. Accordingly, the influence of the erosion of the interacting contact points on the size of the contact force is small.
Um sicher zu stellen, dass die benötigte Kontaktkraft entsteht, ist bei gegebenen Abmessungen und Eigenschaften der zusammenwirkenden Teile die Position des oberen abgewinkelten Endteiles 14 der Kontaktkraftfeder 8 wesentlich. Hierzu ist ein am Kontaktträger 2 angebrachter Gleitbutzen 9 vorgesehen. Das Schwenklager 10 der Blattfederanordnung 8 ist ohne feste Verbindung mit dem Kontaktträger 1 entlang der Gleitfläche 19 frei beweglich und in Abhängigkeit von der Spannung der Kon- taktkraftfeder 8 lediglich begrenzt durch den als Widerlager dienenden Gleitbutzen 9.In order to ensure that the required contact force arises, the position of the upper angled end part 14 of the contact force spring 8 is essential given the dimensions and properties of the interacting parts. For this purpose, a slide connector 9 attached to the contact carrier 2 is provided. The pivot bearing 10 of the leaf spring arrangement 8 can move freely along the sliding surface 19 without a fixed connection to the contact carrier 1 and, depending on the tension of the contact force spring 8, is only limited by the sliding sleeve 9 serving as an abutment.
Es ist noch zu erwähnen, dass sich die dargestellte Anordnung der wippenartigen Kontaktkraftfeder 8 in dem Raum zwischen der den Kontakten abge5wandten Seite des Kontakthebels 2 und dem Kontaktträger 1 befindet und hierdurch gegen Einflüsse von Schaltlichtbögen geschützt ist.It should also be mentioned that the arrangement of the rocker-like contact force spring 8 shown is located in the space between the side of the contact lever 2 facing away from the contacts and the contact carrier 1 and is thereby protected against the effects of switching arcs.
Die in den Figuren 4 bis 7 dargestellte weitere Ausführungs- form einer Schaltkontaktanordnung mit einer Vielzahl von Kon- takthebeln 2 (Vielfachkontaktsystem) weicht in den im folgenden beschriebenen Merkmalen von denen des in den Figuren 1 bis 3 dargestellten Beispieles ab. Hinsichtlich der übrigen Ausgestaltung wird auf die Beschreibung der Ausführungsform nach den Figuren 1 bis 3 verwiesen.The further embodiment of a switch contact arrangement with a plurality of contact levers 2 (multiple contact system) shown in FIGS. 4 to 7 differs in the features described below from those of the example shown in FIGS. 1 to 3. With regard to the remaining configuration, reference is made to the description of the embodiment according to FIGS. 1 to 3.
Während bei dem ersten Ausführungsbeispiel der Erfindung der Gleitbutzen 9 als Mittel zur Positionierung der wippenartigen Kontaktkraftfeder 8 dient, ist bei der in- den Figuren 4 bis 7 dargestellten zweiten Ausführungsform der Erfindung der obere Endschenkel 14 in Richtung des Kontakthebels abgewinkelt. Die Kontakthebel 2 sind mit einer Ausnehmung 15 versehen, in welche der Endschenkel 14 eingreift. Hierdurch sind die Kontaktkraftfedern 8 gegenüber den zugeordneten Kontakthebeln ausrichtet. Wie auch in dem Ausführungsbeispiel gemäß den Figuren 1, 2 und 3 wird die gewünschte Kontaktkraft durch den Einbau der Kontaktkraftfedern 8 in die Schaltkontaktanordnung mit einer bestimmten Vorspannung erreicht.While in the first exemplary embodiment of the invention the slide 9 serves as a means for positioning the rocker-like contact force spring 8, in FIGS illustrated second embodiment of the invention the upper end leg 14 angled in the direction of the contact lever. The contact levers 2 are provided with a recess 15, in which the end leg 14 engages. As a result, the contact force springs 8 are aligned with the associated contact levers. As in the exemplary embodiment according to FIGS. 1, 2 and 3, the desired contact force is achieved by installing the contact force springs 8 in the switching contact arrangement with a specific pretension.
Die Ausbildung mehrerer Kontaktkraftfedern 8 als einteilige Blattfeder 23 ist näher aus den Figuren 5 und 7 ersichtlich. Dabei lässt die Figur 5 erkennen, dass die Blattfeder 23 hinter den Kontakthebeln liegt. Die Montage ist einfach und kann beispielsweise so erfolgen, dass die Blattfeder 23 nach dem Zusammenfügen von Kontaktträger 1 und Kontakthebeln 2 in den Zwischenraum hineingedrückt wird, bis die abgewinkelten Endteile 14 in die Ausnehmungen 25 einrasten.The formation of several contact force springs 8 as a one-piece leaf spring 23 can be seen in more detail in FIGS. 5 and 7. 5 shows that the leaf spring 23 lies behind the contact levers. The assembly is simple and can be carried out, for example, in such a way that the leaf spring 23 is pressed into the intermediate space after the contact carrier 1 and contact levers 2 have been joined until the angled end parts 14 snap into the recesses 25.
Zur Verringerung des Energiebedarfs beim Einschalten eines Leistungsschalters kann es erwünscht sein, dass die Kontaktkraft erst kurz vor der Endstellung der Kontakthebel beim Einschalten auf einen gewünschten Wert erhöht wird. Zur Erreichung dieses Ziels sind, wie deutlich in den Fig.4 und Fig. 6 erkennbar, am Kontakt räger 1 und am Kontakthebel 2To reduce the energy requirement when switching on a circuit breaker, it may be desirable that the contact force is increased to a desired value only shortly before the end position of the contact lever when switching on. To achieve this goal, as can be clearly seen in FIGS. 4 and 6, on the contact carrier 1 and on the contact lever 2
Vorsprünge 16 bzw. 17 vorgesehen, die zueinander versetzt gegenüberstehen und derart angeordnet sind, dass die Federkraft gegen Ende der Einschaltbewegung erhöht wird. BezugszeichenlisteProjections 16 and 17 are provided, which are offset from one another and are arranged such that the spring force is increased towards the end of the switch-on movement. LIST OF REFERENCE NUMBERS
1 Kontaktträger1 contact carrier
2 Kontakthebel 3 Lichtbogenhorn am Gegenkontakt 52 contact lever 3 arcing horn on counter contact 5
4 untere Anschlussschiene4 lower connecting rails
5 Gegenkontakt5 counter contact
6 Antriebsvorrichtung6 drive device
7 Hebelkette 8 wippenartige Kontaktkraftfeder7 lever chain 8 rocker-like contact force spring
9 Gleitbutzen9 sliding slugs
10 Schwenklager der Kontaktkraftfeder10 pivot bearing of the contact force spring
11 Drehpunkt des Kontakthebels 211 pivot point of the contact lever 2
12 Zapfen für Schwenklager 13 biegsame Strombänder12 pins for pivot bearings 13 flexible current strips
14 abgewinkelter Endschenkel der Kontaktkraftfeder 814 angled end leg of the contact force spring 8
15 Ausnehmung am Kontakthebel 215 recess on the contact lever 2
16 Vorsprung am Kontaktträger 116 projection on contact carrier 1
17 Vorsprung am Kontakthebel 2 18 kontaktgebender Endteil des Kontakthebels 217 projection on the contact lever 2 18 contacting end part of the contact lever 2
19 Gleitfläche am Kontaktträger 119 sliding surface on contact carrier 1
20 Knick der Kontaktkraftfeder 820 Kink of the contact force spring 8
21 Schaltkontaktanordnung21 switch contact arrangement
22 Leistungsschalter 23 Blattfeder mit mehreren Kontaktkraftfedern 8 22 Circuit breaker 23 Leaf spring with several contact force springs 8

Claims

Patentansprüche claims
1. Schaltkontaktanordnung mit einem Kontaktträger (1) und einem an dem Kontaktträger (1) um einen Drehpunkt (11) gelenkig bewegbaren Kontakthebel (2) sowie mit einer als Blattfeder ausgebildeten Kontaktkraftfeder (8) zum Anpressen des Kontakthebels (2) an einen Gegenkontakt, (5), d a d u r c h g e k e n n z e i c h n e t , dass die Kontaktkraftfeder (8) wippenartig schwenkbar ange- ordnet ist, derart, dass die Enden (14) der Kontaktkraftfeder (8) am Kontakthebel (2) anliegen und ein Schwenklager (10) der Kontaktkraftfeder (8) zwischen dem Drehpunkt (11) des Kontakthebels (2) und seinem kontaktgebenden Endteil (18) angeordnet ist.1. Switching contact arrangement with a contact carrier (1) and a contact lever (2) which can be articulated on the contact carrier (1) about a pivot point (11) and with a contact force spring (8) designed as a leaf spring for pressing the contact lever (2) against a mating contact, (5), characterized in that the contact force spring (8) is arranged in a rocker-like manner such that the ends (14) of the contact force spring (8) rest on the contact lever (2) and a pivot bearing (10) of the contact force spring (8) between them the pivot point (11) of the contact lever (2) and its contacting end part (18) is arranged.
2. Schal tkontaktanordnung nach Patentanspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass das Schwenklager (10) der Kontaktkraftfeder (8) ohne feste Verbindung mit dem Kontaktträger (1) in Abhängigkeit von der jeweiligen Federkraft entlang einer am Kontaktträger (1) befindlichen Gleitfläche (19) beweglich ist.2. scarf tkontaktanordnung according to claim 1, characterized in that the pivot bearing (10) of the contact force spring (8) without fixed connection with the contact carrier (1) depending on the respective spring force along a contact surface (1) located sliding surface (19) is movable ,
3. Schaltkontaktanordnung nach einem der vorangehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass das Schwenklager (10) der Kontaktkraftfeder (8) durch einen an der im wesentlichen ebenen Gleitfläche (19) am Kontaktträger (1) anliegenden Knick (20) der Kontaktkraftfeder (8) gebildet ist. 3. Switching contact arrangement according to one of the preceding claims, characterized in that the pivot bearing (10) of the contact force spring (8) is formed by a bend (20) of the contact force spring (8) resting on the substantially flat sliding surface (19) on the contact carrier (1) ,
4. Schaltkontaktanordnung nach einem der vorangehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass als Widerlager der Kontaktkraftfeder (8) ein am Kontaktträger (2) sitzender Gleitbutzen (9) vorgesehen ist. (Fig.2 und Fig.3)4. Switching contact arrangement according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that is provided as an abutment of the contact force spring (8) on the contact carrier (2) sliding sleeve (9). (Fig. 2 and Fig. 3)
5. Schaltkontaktanordnung nach einem oder mehreren der Ansprüche 1 - 4 , d a d u r c h g e k e n n z e i c h n e t , dass zur Bildung eines Widerlagers der Kontaktkraftfeder (8) ein Ende (14) derselben abgebogen ist und zur Aufnahme des abgebogenen Endes (14) am Kontakthebel (2) eine Ausnehmung (15) angeordnet ist. (Fig. 4, 6, 7)5. Switching contact arrangement according to one or more of claims 1-4, characterized in that one end (14) is bent to form an abutment of the contact force spring (8) and for receiving the bent end (14) on the contact lever (2) has a recess ( 15) is arranged. (Fig. 4, 6, 7)
6. Schaltkontaktanordnung nach einem der Ansprüche 1 - 5, d a d u r c h g e k e n n z e i c h n e t , dass am Kontaktträger (1) und am Kontakthebel (2) versetzt einander gegenüberstehende Vorsprünge (16, 17) vorgesehen sind in einer derartigen Anordnung, dass die Federkraft beim Einschalten der Schaltkontaktanordnung gegen Ende der Einschaltbewegung ansteigt. (Fig. 4 und Fig. 5)6. Switching contact arrangement according to one of claims 1-5, characterized in that on the contact carrier (1) and on the contact lever (2) offset projections (16, 17) are provided in such an arrangement that the spring force when switching on the switching contact arrangement towards the end the switch-on movement increases. (Fig. 4 and Fig. 5)
7. Schaltkontaktanordnung nach einem der vorangehenden Patentansprüche, d a d u r c h g e k e n n z e i c h n e t , dass bei einer Ausbildung der Schaltkontaktanordnung (20) als Vielfachkontaktanordnung die Kontaktkraftfedern (8) aller Kontakthebel (2) Bestandteil einer einteiligen Blattfeder (23) sind. 7. Switching contact arrangement according to one of the preceding claims, d a d u r c h g e k e n n z e i c h n e t that when the switching contact arrangement (20) is designed as a multiple contact arrangement, the contact force springs (8) of all contact levers (2) are part of a one-piece leaf spring (23).
EP02708231A 2001-02-14 2002-02-07 Switching contact arrangement Expired - Lifetime EP1360709B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10108858 2001-02-14
DE10108858A DE10108858B4 (en) 2001-02-14 2001-02-14 Switching contact arrangement
PCT/DE2002/000485 WO2002065494A1 (en) 2001-02-14 2002-02-07 Switching contact arrangement

Publications (2)

Publication Number Publication Date
EP1360709A1 true EP1360709A1 (en) 2003-11-12
EP1360709B1 EP1360709B1 (en) 2008-05-07

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EP02708231A Expired - Lifetime EP1360709B1 (en) 2001-02-14 2002-02-07 Switching contact arrangement

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US (1) US6879227B2 (en)
EP (1) EP1360709B1 (en)
JP (1) JP4173006B2 (en)
CN (1) CN1288683C (en)
DE (2) DE10108858B4 (en)
HK (1) HK1060209A1 (en)
WO (1) WO2002065494A1 (en)

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KR100817118B1 (en) * 2006-10-17 2008-03-27 엘에스산전 주식회사 Moving conductor of air circuit breaker
DE102006059466A1 (en) 2006-12-14 2008-06-19 Krütten, Viktor Electric switch with rotatably mounted contact element
EP3051550B1 (en) * 2013-09-24 2018-11-14 Siemens Aktiengesellschaft Heart-shaped self-locking button
US9406470B2 (en) 2014-02-18 2016-08-02 General Electric Company Tri-stable flexure mechanism
CN107068466A (en) * 2017-06-05 2017-08-18 泰豪科技股份有限公司 A kind of three-phase apparatus for fast switching suitable for high current
CN109411247A (en) * 2017-08-18 2019-03-01 日立电梯（中国）有限公司 A kind of switch resilience-proof device
CN114503231A (en) * 2019-06-21 2022-05-13 康明斯发电Ip公司 Flat force power-on inductive switch

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JPS63114018A (en) * 1986-10-29 1988-05-18 富士電機株式会社 Contactor
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Also Published As

Publication number Publication date
US20040066257A1 (en) 2004-04-08
WO2002065494A1 (en) 2002-08-22
DE10108858A1 (en) 2002-09-05
DE50212223D1 (en) 2008-06-19
JP2004522260A (en) 2004-07-22
JP4173006B2 (en) 2008-10-29
CN1484843A (en) 2004-03-24
US6879227B2 (en) 2005-04-12
HK1060209A1 (en) 2004-07-30
EP1360709B1 (en) 2008-05-07
CN1288683C (en) 2006-12-06
DE10108858B4 (en) 2009-11-19

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