EP1137038B1 - Switching shaft unit for a switch - Google Patents

Switching shaft unit for a switch Download PDF

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Publication number
EP1137038B1
EP1137038B1 EP01106654A EP01106654A EP1137038B1 EP 1137038 B1 EP1137038 B1 EP 1137038B1 EP 01106654 A EP01106654 A EP 01106654A EP 01106654 A EP01106654 A EP 01106654A EP 1137038 B1 EP1137038 B1 EP 1137038B1
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EP
European Patent Office
Prior art keywords
contact element
shaft unit
accordance
switch shaft
tensioning
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
EP01106654A
Other languages
German (de)
French (fr)
Other versions
EP1137038A3 (en
EP1137038A2 (en
Inventor
Rolf-Dieter Bauer
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.)
AEG Niederspannungstechnik GmbH and Co KG
Original Assignee
AEG Niederspannungstechnik GmbH and Co KG
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 AEG Niederspannungstechnik GmbH and Co KG filed Critical AEG Niederspannungstechnik GmbH and Co KG
Publication of EP1137038A2 publication Critical patent/EP1137038A2/en
Publication of EP1137038A3 publication Critical patent/EP1137038A3/en
Application granted granted Critical
Publication of EP1137038B1 publication Critical patent/EP1137038B1/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
    • H01H73/045—Bridging 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
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
    • 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
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
    • H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
    • H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position

Definitions

  • the invention relates to a switching shaft unit for a switch according to the preamble of claim 1.
  • a switching shaft unit which is installed in a switch 1 shown in Fig. 5.
  • This switch 1 has a movable contact 2 which is rotatably mounted on the axis 3 of a switching shaft 4 and together with this forms a switching shaft unit.
  • the shift shaft 4 is mounted even in a pole-track housing, not shown, and has two diametrically opposed satellite axes 5 and 6, which are rotated about the axis 3 at a rotation of the shift shaft 4.
  • the axis 5 is the point of application for a hinge mechanism 7, which is connected to a latch lever 8.
  • the pawl lever 8 is pivotally mounted on an axis 10 positioned on the switch housing 9 and is released by a switching mechanism 11 in the event of an overcurrent or short circuit, in order to enable the separate state of the contact 2 shown in FIG.
  • the switching mechanism 11 is in turn actuated by a pivotable about an axis of rotation 12 trigger lever 13.
  • a switching shaft unit in which an S-shaped contact element is provided.
  • the contact element is acted upon by a biasing member and an actuated by this, acting in the region of the vertex of the contact element hinge element in the closing direction and when exceeding a dead center in the opening direction.
  • a control contour is provided in this known type on the contact element.
  • a switching shaft unit shown in Figures 1 and 2 has a contact element 2 which is mounted on an axis 3 and S-shaped.
  • the contact element 2 is received in a centrally formed in the body 4 of the switching shaft unit slot 15.
  • On the circumference of the switching shaft body 4 two diametrically opposed slots 17 are formed, in which two parallel to each other extending pins 19 are accommodated.
  • the spring are located on the outside of the drum-like switching shaft body 4 and therefore can only be seen in the illustration of FIG.
  • a contact element 2 passing through Articulated axle 21 is provided on which a pair of laterally mounted on the contact element hinge elements or tabs 23 are rotatably mounted with its first end. At their second end, the tabs 23 recesses 22 in which the pins 19 engage.
  • the positions of the mutually tensioned pins 19 and the hinge axes 21 are selected so that the pins 19 can not reach the bottoms of the slots 17 due to a support on the hinge elements 23 in the closed state of the contact element 2 and thereby exert a torque on the contact element 2 , This torque keeps the contact element in the closed state.
  • control contour 25 In the region of the vertex of the contact element 2 symmetrically identical to each other running control contours 25 are formed, which can be brought in certain hereinafter to be explained opening positions of the contact element 2 with the pins 19 in abutment.
  • the control contour 25 is formed by two successive elevation stages. The corresponding imaginary position of the pin 19 is shown in FIG. 1 on these elevation stages for clarification of the mode of operation of the control contour described below.
  • the switching shaft unit is mounted in the housing of a circuit breaker shown in Fig. 5.
  • the body 4 of the switching shaft is substantially immobile, wherein in the closed state of the contacts, as shown in Figures 1 to 3, the contact element 2 is pressed by the mutually tensioned pins 19 with the interposition of the hinge elements 23 against the contact conductor 27.
  • the contact element 2 Under the normal conditions of switching on and off of the circuit breaker, the contact element 2 is rotated by such an angle, which does not go beyond the dead center marked with the line A in Fig. 1. Only under short-circuit conditions, the momentum of the contact element 2 is sufficient to overcome the counteracting torque generated by the above-mentioned springs 18 and thus to exceed the dead center line A.
  • the two-stage control contour 25 causes with the second stage 29, on which the imaginary position of the pin 19 is indicated in Figure 1 by the reference numeral C, that the contact element 2 is braked at too high acceleration beyond the dead center A addition in that the Pins 19 when reaching the second stage slightly be pressed apart.
  • This load on the pins 19 counteracts the rising after exceeding the dead center and acting clockwise torque, so that the contact lever 2 braked and its possible rebound beyond the dead center out back into the closed position of the contacts is avoided.
  • the biasing device consisting of the pins 19, the springs 18 and the hinge elements 23 can be formed only at the one vertex of the S-shaped contact element, in which the other end of the respective spring 18 engaging the pin 19 is firmly fixed to the switch shaft body 4 becomes.
  • the second stage of the control contour 25 can be dispensed with, if the load characteristics of the relevant circuit breaker in which the switching shaft unit is to be installed permit this.
  • a switching shaft unit for a switch has an on an axis (3) rotatably mounted, S-shaped contact element (2) of a substantially perpendicular to the axis (3) acting biasing member (19) and actuated by a, in the area the vertex of the contact element attacking joint element (23) in the closing direction and when exceeding a dead center (A) in the opening direction can be acted upon.
  • the contact element (2) has, on its side facing the pretensioning element, a control contour (25; 28, 29) which can be brought into engagement with the pretensioning element (19) during an opening rotation of the contact element (2) before reaching the dead center (A) (B).

Abstract

The unit has an S-shaped contact element rotatably mounted on an axle, operated in the closing direction by a bias element acting essentially perpendicularly to the axle and a joint element actuated by it and engaging near the apex of the contact element and in the opening direction when a dead point has been passed. The contact element has a control contour for engagement with the bias element during opening and before reaching the dead point. The unit has an S-shaped contact element (2) rotatably mounted on an axle (3), operated in the closing direction by a bias element (19) acting essentially perpendicularly to the axle and a joint element (23) actuated by it and engaging near the apex of the contact element and in the opening direction when a dead point (A) has been passed. The contact element has a control contour (25) on the side facing the bias element for engagement with the bias element during opening and before reaching the dead point.

Description

Die Erfindung bezieht sich auf eine Schaltwelleneinheit für einen Schalter gemäß dem Oberbegriff von Anspruch 1.The invention relates to a switching shaft unit for a switch according to the preamble of claim 1.

Aus der früheren Deutschen Patentanmeldung Nr. 19903911.9 ist eine Schaltwelleneinheit bekannt, die in einem in Fig. 5 gezeigten Schalter 1 eingebaut ist. Dieser Schalter 1 hat einen beweglichen Kontakt 2, der drehbar auf der Achse 3 einer Schaltwelle 4 gelagert ist und mit dieser zusammen eine Schaltwelleneinheit bildet. Die Schaltwelle 4 ist selbst in einem nicht dargestellten Polbahngehäuse gelagert und hat zwei diametral gegenüberliegende Satellit-Achsen 5 und 6, die bei einer Drehung der Schaltwelle 4 um die Achse 3 mitgedreht werden. Die Achse 5 ist der Angriffspunkt für einen Gelenkmechanismus 7, der mit einem Klinkenhebel 8 verbunden ist. Der Klinkenhebel 8 ist auf einer am Schaltergehäuse 9 positionierten Achse 10 schwenkbar gelagert und wird bei einem Überstrom bzw. Kurzschluß von einem Schaltschloß 11 freigegeben, um den in Fig. 5 gezeigten getrennten Zustand des Kontaktes 2 zu ermöglichen. Der Schaltschloß 11 ist seinerseits durch einen um eine Drehachse 12 schwenkbaren Auslösehebel 13 betätigbar.From the earlier German Patent Application No. 19903911.9 a switching shaft unit is known, which is installed in a switch 1 shown in Fig. 5. This switch 1 has a movable contact 2 which is rotatably mounted on the axis 3 of a switching shaft 4 and together with this forms a switching shaft unit. The shift shaft 4 is mounted even in a pole-track housing, not shown, and has two diametrically opposed satellite axes 5 and 6, which are rotated about the axis 3 at a rotation of the shift shaft 4. The axis 5 is the point of application for a hinge mechanism 7, which is connected to a latch lever 8. The pawl lever 8 is pivotally mounted on an axis 10 positioned on the switch housing 9 and is released by a switching mechanism 11 in the event of an overcurrent or short circuit, in order to enable the separate state of the contact 2 shown in FIG. The switching mechanism 11 is in turn actuated by a pivotable about an axis of rotation 12 trigger lever 13.

Ferner ist aus der Druckschrift WO 99/62092 A eine Schaltwelleneinheit bekannt, bei der ein S-förmig ausgebildetes Kontaktelement vorgesehen ist. Das Kontaktelement wird dabei von einem Vorspannelement und einem von diesem betätigten, im Bereich der Scheitel des Kontaktelements angreifenden Gelenkelement in Schließrichtung und beim Überschreiten eines Totpunkts in die Öffnungsrichtung beaufschlagt. Außerdem ist bei dieser bekannten Bauart an dem Kontaktelement eine Steuerkontur vorgesehen.Furthermore, from the publication WO 99/62092 A a switching shaft unit is known, in which an S-shaped contact element is provided. The contact element is acted upon by a biasing member and an actuated by this, acting in the region of the vertex of the contact element hinge element in the closing direction and when exceeding a dead center in the opening direction. In addition, a control contour is provided in this known type on the contact element.

Es ist die Aufgabe der Erfindung, eine verbesserte Schaltwelleneinheit zu schaffen, bei der ein mögliches Zurückprallen der Kontakthebel über den Totpunkt hinaus vermieden werden kann.It is the object of the invention to provide an improved control shaft unit, in which a possible rebound of the contact lever beyond the dead center can be avoided.

Die Aufgabe wird durch eine Schaltwelleneinheit mit den Merkmalen von Anspruch 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.The object is achieved by a switching shaft unit having the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels unter Bezugnahme auf Zeichnungen näher erläutert.
Es zeigen:

Fig. 1:
eine isolierte Schnittdarstellung einer Schaltwelleneinheit gemäß der Erfindung;
Fig. 2:
eine perspektivische Darstellung der in Fig. 1 gezeigten Schaltwelleneinheit;
Fig. 3:
eine vereinfachte Schnittdarstellung der in Fig. 1 gezeigten Schaltwelleneinheit im geschlossenen Zustand des Kontakts;
Fig. 4:
eine vereinfachte Schnittdarstellung der in Fig. 1 gezeigten Schaltwelleneinheit im geöffneten Zustand des Kontakts; und
Fig. 5:
einen herkömmlichen Schalter mit einer darin eingebauten Schaltwelleneinheit.
The invention is explained below with reference to an embodiment with reference to drawings.
Show it:
Fig. 1:
an isolated sectional view of a switching shaft unit according to the invention;
Fig. 2:
a perspective view of the switching shaft unit shown in Figure 1;
3:
a simplified sectional view of the switching shaft unit shown in Figure 1 in the closed state of the contact.
4:
a simplified sectional view of the switching shaft unit shown in Figure 1 in the open state of the contact. and
Fig. 5:
a conventional switch with a built-in switching shaft unit.

Eine in den Figuren 1 und 2 gezeigte Schaltwelleneinheit hat ein Kontaktelement 2, das auf einer Achse 3 gelagert und S-förmig ausgebildet ist. Das Kontaktelement 2 ist in einem im Körper 4 der Schaltwelleneinheit mittig ausgebildeten Schlitz 15 aufgenommen. Am Umfang des Schaltwellenkörpers 4 sind zwei diametral zueinander angeordnete Schlitze 17 ausgebildet, in denen sich zwei parallel zueinander erstreckende Stifte 19 aufgenommen sind. An ihren gegenüberliegenden Enden sind die Stifte 19 mit jeweils einer Feder 18 gegeneinander und somit gegen die Böden der Schlitze 17 beaufschlagt. Die Feder befinden sich auf der Außenseite des trommelartigen Schaltwellenkörpers 4 und sind daher nur in der Darstellung der Fig. 2 zu erkennen.A switching shaft unit shown in Figures 1 and 2 has a contact element 2 which is mounted on an axis 3 and S-shaped. The contact element 2 is received in a centrally formed in the body 4 of the switching shaft unit slot 15. On the circumference of the switching shaft body 4 two diametrically opposed slots 17 are formed, in which two parallel to each other extending pins 19 are accommodated. At their opposite ends, the pins 19, each with a spring 18 against each other and thus acted upon against the bottoms of the slots 17. The spring are located on the outside of the drum-like switching shaft body 4 and therefore can only be seen in the illustration of FIG.

Im Bereich der Scheitel des S-förmigen Kontaktelements 2 ist jeweils eine das Kontaktelement 2 durchsetzende Gelenkachse 21 vorgesehen, auf der ein Paar seitlich am Kontaktelement angebrachte Gelenkelemente bzw. Laschen 23 mit ihrem ersten Ende drehbar gelagert sind. An ihrem zweiten Ende weisen die Laschen 23 Ausnehmungen 22 auf, in denen die Stifte 19 eingreifen. Dabei sind die Positionen der zueinander gespannten Stifte 19 und der Gelenkachsen 21 so gewählt, dass die Stifte 19 wegen einer Abstützung auf den Gelenkelementen 23 im geschlossenen Zustand des Kontaktelements 2 die Böden der Schlitze 17 nicht erreichen können und dadurch ein Drehmoment auf das Kontaktelement 2 ausüben. Dieses Drehmoment hält das Kontaktelement im geschlossenen Zustand.In the region of the vertex of the S-shaped contact element 2 is in each case a contact element 2 passing through Articulated axle 21 is provided on which a pair of laterally mounted on the contact element hinge elements or tabs 23 are rotatably mounted with its first end. At their second end, the tabs 23 recesses 22 in which the pins 19 engage. The positions of the mutually tensioned pins 19 and the hinge axes 21 are selected so that the pins 19 can not reach the bottoms of the slots 17 due to a support on the hinge elements 23 in the closed state of the contact element 2 and thereby exert a torque on the contact element 2 , This torque keeps the contact element in the closed state.

Im Bereich der Scheitel des Kontaktelements 2 sind symmetrisch zueinander identisch verlaufende Steuerkonturen 25 ausgebildet, die in bestimmten im folgenden noch zu erläuternden Öffnungspositionen des Kontaktelements 2 mit den Stiften 19 in Anlage bringbar sind. Bei dem in Fig. 1 gezeigten Ausführungsbeispiel ist die Steuerkontur 25 durch zwei aufeinanderfolgende Erhebungsstufen gebildet. Auf diesen Erhebungsstufen ist in Fig. 1 die entsprechende imaginäre Position des Stiftes 19 zur Verdeutlichung der im folgenden beschriebene Funktionsweise der Steuerkontur eingezeichnet.In the region of the vertex of the contact element 2 symmetrically identical to each other running control contours 25 are formed, which can be brought in certain hereinafter to be explained opening positions of the contact element 2 with the pins 19 in abutment. In the embodiment shown in Fig. 1, the control contour 25 is formed by two successive elevation stages. The corresponding imaginary position of the pin 19 is shown in FIG. 1 on these elevation stages for clarification of the mode of operation of the control contour described below.

Zur Aufnahme ihrer Funktion wird die Schaltwelleneinheit in das in Fig. 5 gezeigte Gehäuse eines Leistungsschalters montiert. In diesem Zustand ist der Körper 4 der Schaltwelle im wesentlichen unbeweglich, wobei im geschlossenen Zustand der Kontakte, wie in den Figuren 1 bis 3 gezeigt, das Kontaktelement 2 durch die zueinander gespannten Stifte 19 unter Zwischenschaltung der Gelenkelemente 23 gegen die Kontaktleiter 27 gedrückt wird. Unter den normalen Bedingungen des Ein- und Ausschaltens des Leistungsschalters wird das Kontaktelement 2 um einen solchen Winkel gedreht, der über den mit der Linie A in Fig. 1 gekennzeichneten Totpunkt nicht hinausgeht. Erst unter Kurzschlussbedingungen ist der Schwung des Kontaktelements 2 ausreichend, um das durch die oben genannten Federn 18 erzeugte entgegenwirkende Drehmoment zu überwinden und somit die Totpunktlinie A zu überschreiten. Nach dem Überschreiten der Totpunktlinie A ist eine Rückführung des Kontaktelements 2 in den geschlossenen Kontaktzustand nicht mehr möglich, weil das durch die Feder 18 verursachte Drehmoment nunmehr in die entgegengesetzte Richtung, d.h. in Öffnungsrichtung wirkt. Demzufolge verbleibt das Kontaktelement in der in Fig. 4 gezeigten offenen Stellung.To accommodate their function, the switching shaft unit is mounted in the housing of a circuit breaker shown in Fig. 5. In this state, the body 4 of the switching shaft is substantially immobile, wherein in the closed state of the contacts, as shown in Figures 1 to 3, the contact element 2 is pressed by the mutually tensioned pins 19 with the interposition of the hinge elements 23 against the contact conductor 27. Under the normal conditions of switching on and off of the circuit breaker, the contact element 2 is rotated by such an angle, which does not go beyond the dead center marked with the line A in Fig. 1. Only under short-circuit conditions, the momentum of the contact element 2 is sufficient to overcome the counteracting torque generated by the above-mentioned springs 18 and thus to exceed the dead center line A. After exceeding the dead center line A, a return of the contact element 2 in the closed contact state is no longer possible because the torque caused by the spring 18 now acts in the opposite direction, ie in the opening direction. As a result, the contact element remains in the open position shown in FIG.

Mit der in Fig. 1 und 2 gezeigten Steuerkontur 25 wird außerdem bewirkt, dass das Kontaktelement 2 bereits kurz vor dem Erreichen der Totpunktlinie A mit der ersten Erhebung 28 der Steuerkontur 25 in Anlage mit den Stiften 19 gelangt und dadurch die Funktion des Angriffspunkts für das von den Stiften 19 ausgeübte rückführende Drehmoment übernimmt. Der dadurch plötzlich entstehende längere Hebel am Kontaktelement 2 bewirkt bei gleichbleibender Federkraft ein stark ansteigendes rückführendes Drehmoment und somit eine verstärkte Abbremsung des bei einem stärkeren Überstrom in Richtung des Uhrzeigersinns in Fig. 1 beschleunigten Kontaktelements 2.With the control contour 25 shown in Fig. 1 and 2 is also causes the contact element 2 already passes shortly before reaching the dead center line A with the first survey 28 of the control contour 25 into contact with the pins 19 and thereby the function of the point of attack for the takes over from the pins 19 exerted return torque. The thus resulting suddenly longer lever on the contact element 2 causes a strong increasing return torque and thus an increased deceleration of accelerated at a stronger overcurrent in the clockwise direction in Fig. 1 contact element 2 with constant spring force.

Die zweistufige Steuerkontur 25 bewirkt mit der zweiten Stufe 29, auf der die imaginäre Lage des Stiftes 19 in Fig. 1 mit dem Bezugszeichen C gekennzeichnet ist, dass das Kontaktelement 2 bei einer zu großen Beschleunigung über den Totpunkt A hinaus dadurch abgebremst wird, dass die Stifte 19 beim Erreichen der zweiten Stufe geringfügig auseinandergedrückt werden. Diese Belastung der Stifte 19 wirkt dem nach Überschreitung des Totpunkts ansteigenden und im Uhrzeigersinn wirkenden Drehmoment entgegen, so dass das Kontakthebel 2 abgebremst und sein mögliches Zurückprallen über den Totpunkt hinaus zurück in die Schließstellung der Kontakte vermieden wird.The two-stage control contour 25 causes with the second stage 29, on which the imaginary position of the pin 19 is indicated in Figure 1 by the reference numeral C, that the contact element 2 is braked at too high acceleration beyond the dead center A addition in that the Pins 19 when reaching the second stage slightly be pressed apart. This load on the pins 19 counteracts the rising after exceeding the dead center and acting clockwise torque, so that the contact lever 2 braked and its possible rebound beyond the dead center out back into the closed position of the contacts is avoided.

Auf der Grundlage des oben beschriebenen Ausführungsbeispiels sind verschiedene Abwandlungen der erfindungsgemäßen Schaltwelleneinheit möglich. So zum Beispiel kann die aus den Stiften 19, den Federn 18 und den Gelenkelementen 23 bestehende Vorspannvorrichtung nur an dem einen Scheitel des S-förmigen Kontaktelements ausgebildet werden, in dem das andere Ende der jeweiligen am Stift 19 eingreifenden Feder 18 am Schaltwellenkörper 4 fest positioniert wird. Zur Vereinfachung der Fertigung des Kontaktelements kann zum Beispiel auf die zweite Stufe der Steuerkontur 25 verzichtet werden, falls die Belastungscharakteristika des betreffenden Leistungsschalters, in dem die Schaltwelleneinheit einzubauen ist, dies erlauben.On the basis of the embodiment described above, various modifications of the switching shaft unit according to the invention are possible. For example, the biasing device consisting of the pins 19, the springs 18 and the hinge elements 23 can be formed only at the one vertex of the S-shaped contact element, in which the other end of the respective spring 18 engaging the pin 19 is firmly fixed to the switch shaft body 4 becomes. To simplify the manufacture of the contact element, for example, the second stage of the control contour 25 can be dispensed with, if the load characteristics of the relevant circuit breaker in which the switching shaft unit is to be installed permit this.

Eine Schaltwelleneinheit für einen Schalter hat ein auf einer Achse (3) drehbar gelagertes, S-förmig ausgebildetes Kontaktelement (2), das von einem im wesentlichen senkrecht zur Achse (3) wirkenden Vorspannelement (19) und durch ein von diesem betätigtes, im Bereich der Scheitel des Kontaktelements angreifendes Gelenkelement (23) in Schließrichtung und beim Überschreiten eines Totpunkts (A) in die Öffnungsrichtung beaufschlagbar ist. Das Kontaktelement (2) weist auf seiner dem Vorspannelement zugewandten Seite eine Steuerkontur (25; 28, 29) auf, die bei einer öffnenden Drehung des Kontaktelements (2) vor Erreichen des Totpunkts (A) mit dem Vorspannelement (19) in Eingriff bringbar ist (B).
(FIG. 1)A switching shaft unit for a switch has an on an axis (3) rotatably mounted, S-shaped contact element (2) of a substantially perpendicular to the axis (3) acting biasing member (19) and actuated by a, in the area the vertex of the contact element attacking joint element (23) in the closing direction and when exceeding a dead center (A) in the opening direction can be acted upon. The contact element (2) has, on its side facing the pretensioning element, a control contour (25; 28, 29) which can be brought into engagement with the pretensioning element (19) during an opening rotation of the contact element (2) before reaching the dead center (A) (B).
(FIG.1)

Claims (8)

  1. Switch shaft unit for a switch with an S-shaped contact element (2), rotatably mounted on a spindle (3), which can be acted upon by a pre-tensioning element (19) and an articulated element (15) operated by this which acts in the area of the apex of the contact element (2) in the closing direction and, on passing a dead-centre point, in the opening direction,
    whereby the contact element (2) has a control contour (25) on its side facing the pre-tensioning element (19),
    characterised in that
    the pre-tensioning element (19) acts perpendicular to the spindle (3) and the control contour can be brought to engage with the pre-tensioning element (19) before reaching the dead-centre point on an opening rotation of the contact element (2).
  2. Switch shaft unit in accordance with claim 1,
    characterised in that
    the control contour (25) possesses a lifting step (28) which effects an increase in the torque exercised by the pre-tensioning element (19) on the contact element (2).
  3. Switch shaft unit in accordance with claim 2,
    characterised in that
    the lifting step (28) is arranged so that it can be brought to engage with the pre-tensioning element (19) by the contact element (2) immediately before reaching the dead-centre point.
  4. Switch shaft unit in accordance with claim 1,
    characterised in that
    the control contour (25) possesses an additional second lifting step (29) which follows on from the first lifting step (28).
  5. Switch shaft unit in accordance with claim 4,
    characterised in that
    the second lifting step (29) is arranged in such a way that it can only be brought to engage with the pre-tensioning element (19) by the contact element (2) after reaching the dead-centre point.
  6. Switch shaft unit in accordance with one of claims 1 to 5,
    characterised in that
    the pre-tensioning elements (19) are formed as two pins which are pressed together by two springs (18) acting on their ends and, on the side of each apex of the contact element (2), project into the ends of a pair of articulated elements (23) possessing recesses (22), the other ends of which are rotatably attached to both sides of the contact element (2).
  7. Switch shaft unit in accordance with claim 6,
    characterised in that
    the control contour (25) possesses plateau sections after each lifting step (28; 29) which do not cause the pre-tensioning elements (19) to be pressed any further apart.
  8. Switch shaft unit in accordance with claim 4 or 5,
    characterised in that
    the articulated elements (23) are supported in pairs on a spindle (21) passing through the contact element (2).
EP01106654A 2000-03-17 2001-03-16 Switching shaft unit for a switch Expired - Lifetime EP1137038B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10013160 2000-03-17
DE10013160A DE10013160B4 (en) 2000-03-17 2000-03-17 Switch shaft unit for a switch

Publications (3)

Publication Number Publication Date
EP1137038A2 EP1137038A2 (en) 2001-09-26
EP1137038A3 EP1137038A3 (en) 2003-03-19
EP1137038B1 true EP1137038B1 (en) 2007-05-16

Family

ID=7635199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01106654A Expired - Lifetime EP1137038B1 (en) 2000-03-17 2001-03-16 Switching shaft unit for a switch

Country Status (4)

Country Link
EP (1) EP1137038B1 (en)
AT (1) ATE362645T1 (en)
DE (2) DE10013160B4 (en)
ES (1) ES2286051T3 (en)

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Publication number Priority date Publication date Assignee Title
ITMI20012327A1 (en) 2001-11-06 2003-05-06 Abb Service Srl LOW VOLTAGE SWITCH
DE102005050705B4 (en) * 2005-10-05 2008-07-31 Moeller Gmbh Contact system for a low-voltage switch
DE102006012125B3 (en) * 2006-03-09 2007-11-15 Siemens Ag Electrical switchgear, has coupling unit and multi-coupling rod, where mechanical connections between unit and rod enable movement of unit independent of movement of rod, and drive strand for operating movable contact
DE102007040163A1 (en) 2007-08-21 2009-02-26 Siemens Ag Switching device with a switching shaft for mounting a rotary contact bridge and multi-pole switching device arrangement
DE102008007364A1 (en) 2008-01-30 2009-08-27 Siemens Aktiengesellschaft Rotary contact system for circuit-breaker, has metal strip comprising curved contact end bent to loop such that end piece is plunged into recess, which lies opposite to movable switching contact
DE102008007363A1 (en) 2008-01-30 2009-08-06 Siemens Aktiengesellschaft Rotary contact system for a switching device and switching devices with such a rotary contact system
DE102008007365A1 (en) 2008-01-30 2009-08-06 Siemens Aktiengesellschaft Three-pole switching device i.e. molded case circuit breaker power switching device, has contact spring elements tiltably mounted for purpose of three-point mounting in support point in selector shaft segment and connected with contact arms
DE102008037967A1 (en) 2008-08-13 2010-02-18 Siemens Aktiengesellschaft Rotary contact system for power switching device, has spring gripping molded inner contour of recess in spring loaded condition such that arms are provided with slack point characteristic during rotational motion relative to shaft segments
DE102011081102A1 (en) * 2011-08-17 2013-02-21 Siemens Aktiengesellschaft Electric switch
GB2576338A (en) * 2018-08-15 2020-02-19 Eaton Intelligent Power Ltd Switching device and method for operating a switching device

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FR2688626B1 (en) * 1992-03-13 1994-05-06 Merlin Gerin CIRCUIT BREAKER WITH MOLDED BOX WITH BRIDGE OF BRAKE CONTACTS AT THE END OF PULSE STROKE.
IT1292453B1 (en) * 1997-07-02 1999-02-08 Aeg Niederspannungstech Gmbh ROTATING GROUP OF CONTACTS FOR HIGH FLOW SWITCHES
US6114641A (en) * 1998-05-29 2000-09-05 General Electric Company Rotary contact assembly for high ampere-rated circuit breakers
DE19903911B4 (en) * 1999-02-01 2004-09-23 Ge Power Controls Polska Sp.Z.O.O. Tripping device for switches and switch contact arrangement
US6310307B1 (en) * 1999-12-17 2001-10-30 General Electric Company Circuit breaker rotary contact arm arrangement

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WO2001006530A1 (en) * 1999-07-20 2001-01-25 Aeg Niederspannungstechnik Gmbh & Co. Kg Displaceable contact having low electrical resistance

Also Published As

Publication number Publication date
DE10013160B4 (en) 2006-07-06
EP1137038A3 (en) 2003-03-19
EP1137038A2 (en) 2001-09-26
ES2286051T3 (en) 2007-12-01
DE50112498D1 (en) 2007-06-28
ATE362645T1 (en) 2007-06-15
DE10013160A1 (en) 2001-10-04

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