EP0327502B1 - Switch latch of a fitted installation switch - Google Patents

Switch latch of a fitted installation switch Download PDF

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Publication number
EP0327502B1
EP0327502B1 EP89810071A EP89810071A EP0327502B1 EP 0327502 B1 EP0327502 B1 EP 0327502B1 EP 89810071 A EP89810071 A EP 89810071A EP 89810071 A EP89810071 A EP 89810071A EP 0327502 B1 EP0327502 B1 EP 0327502B1
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EP
European Patent Office
Prior art keywords
latch
hand
switch
slide
ratchet
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Expired - Lifetime
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EP89810071A
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German (de)
French (fr)
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EP0327502A1 (en
Inventor
Jörg Stamm
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ABB Patent GmbH
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ABB Patent GmbH
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Publication date
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Priority to AT89810071T priority Critical patent/ATE91043T1/en
Publication of EP0327502A1 publication Critical patent/EP0327502A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel

Definitions

  • the invention relates to a key switch in an installation built-in switch of electrical low-voltage distribution networks which switches off in the event of overcurrent, in particular in motor protection switches, with means for manual switching off and automatic triggering arranged between a circuit board and a chamber, with the further features according to the first part of claim 1.
  • all known installation built-in switches can also be switched off manually, by actuating a pivotable or tiltable hand lever or a push button. Manual switching from the off to the on position saves energy. When it is switched off manually or triggered automatically, the stored energy is released and the switch jumps to the off position.
  • Switch locks of known design are designed in such a way that when switching manually from the on to the out position, the contact or the contacts are / are opened continuously in linear motion.
  • the contact pressure of two contacts is initially reduced and then gradually separated from each other.
  • An arc arises between two moving contact plates, which is not only undesirable but also leads to increased material wear and further impairments, in particular of the contacts and the housing made of plastic.
  • the inventor has set himself the task of further developing the switch lock described above for switching installation built-in switches in such a way that, regardless of the speed at which the switch lever is actuated, it generates a rapid shutdown and allows the freewheeling function when triggered automatically.
  • the switch-off force generated manually on a shift lever is transferred to a gradation of a slide hand that can be displaced in the direction of a ratchet hand until a ratchet latch disengages from the pivoting ratchet hand and is opened by stored spring force.
  • An automatically actuable release pawl can also be pivoted until its nose lies next to a ratchet nose and a pawl that is tensioned with spring force allows a pivoting movement corresponding to the nose height, which is transferred to the pawl hand.
  • the latch tab is disengaged from the pivoting latch hand and opened by stored spring force, which causes the electrical contacts of the installation installation switch to open suddenly.
  • a sudden arc is prevented by the sudden opening of the electrical contacts, which leads to the immediate interruption of the current flowing through the built-in switch. Significantly less erosion damage occurs on the contact plates, the surrounding plastic housing parts are not damaged.
  • the latch tab opens due to overcurrent or undervoltage when the switching cam or lever is blocked. the freewheel function is guaranteed.
  • the type of tripping (manual or electrical in the event of overcurrent or undervoltage) is expediently displayed visibly from the outside.
  • the gradation in the sliding surface of the slider hand is approximately rectangular.
  • the pivot pin which swivels with the switch cam, can thus transmit the force to the gradation without essential lateral components and move the pawl hand to disengage the pawl tab.
  • the height of the gradation in the sliding surface of the slide hand preferably corresponds approximately to the diameter of the bearing pin.
  • the slide hand is preferably pulled back into the original position by a tension spring.
  • An articulated connection with the pawl hand means that this too is returned to the original position.
  • This articulated connection is expediently established by appropriately arranged bolts.
  • the functional parts of a key switch 10 are essentially between a chamber 12 and one, not shown Metal board arranged.
  • the chamber which is usually made of plastic, is used as a carrier plate.
  • the parts of this carrier plate which are not essential for the understanding of the invention are neither specified nor discussed, they are readily understandable for the person skilled in the art.
  • a shift axis 14 which is essentially square in cross section, receives a shift lever (not shown).
  • a cam of the shift lever engages in a guide groove 16 when it is attached.
  • a torsion spring for resetting the shift lever is arranged outside the metal plate when the shift lock is working, wrapping around the shift axis 14.
  • Rigidly connected to the switching axis 14 or integrally formed with it is a switching cam 18 which serves to transmit power to other components of the switching lock.
  • the tab group essentially comprises a pawl tab 20, a 5-part tab with three arms pivotally held together by a rivet 22 and a plunger 24.
  • the angled latch tab 20 is pivotable about the axis 26 of a spacer sleeve 28.
  • the spring clip 20 pivots counterclockwise in the absence of counterforce.
  • the 5-part plate transmits the swivel movement or latch plate 20 into a linear movement transmitted to the plunger 24.
  • the first, one-piece arm 30 of the 5-piece tab is connected in an articulated manner to the switching cam 18 via a bearing pin 32, which is elongated in the direction of the viewer.
  • the second arm 34 of the bracket is connected via a rivet 36 in the corner area thereof to the latch bracket 20, likewise in an articulated manner.
  • the third arm 38 which is formed in two parts like the second arm, is connected to the axially movable plunger 24 via an axis 40.
  • the plunger 24 transmits the force generated manually during the switch-on movement to an electrical contact system of a known type, not shown, and possibly additionally to an undervoltage release.
  • the pawl group essentially comprises a pawl 42 and a pawl hand 44.
  • the pawl 42 is - according to the pawl tab 20 - pivotable about an axis 46 arranged in a spacer sleeve 48.
  • a torsion spring not shown, ensures the return of the pawl 42 in a clockwise direction.
  • the pawl 42 and the pawl hand 44 are pivotally connected to one another with a rivet 50.
  • Bolt systems of known design ensure the power transmission within the latch group.
  • the slider hand 52 can be pivoted about an axis 54 within narrow limits.
  • a widely protruding finger 56 of the slider hand lies on the end face on the end of the pawl hand 44 facing away from the rivet 50
  • Tension spring 58 equipped for feedback.
  • the automatic triggering takes place by means of a trigger pawl 60 which can be pivoted a little about an axis 62, in this case 8 °.
  • a torsion spring 64 is used to return the release pawl 60.
  • a compensator acts on a cam 66 of the release pawl 60 to carry out the smooth rotational movement, which compensator is actuated by the thermal release elements, the bimetals, in the event of overcurrent.
  • a trigger or moment slide engages on a further cam 67 to provide the trigger in the event of a strong overcurrent of the electromagnetic release system or an undervoltage release device.
  • the disengagement is initiated by a movement of the slide hand 52, which is directly engaged with the pawl hand 44 (manual release) or by the pawl 42, which transfers its pivoting movement to the pawl hand 44 via the rivet 50 (automatic or electrical release).
  • Fig. 1 the switched-on position of the switch lock 10, the latch tab 20 is latched via its latch 74 on the latch 72 of the latch hand 44. Likewise, the nose 68 of the release pawl 60 engages on the nose 70 of the pawl 42. The second arm 34 and the third arm 38 of the 5-part tab form a practically elongated angle, the plunger 24 is therefore pressed far down. The contacts of the installation built-in switch are closed.
  • the latch tab 20 opens abruptly in the direction of the arrow 82.
  • the switching cam 18 jumps over the step 84 (FIG. 2) in the slide hand 52 and kinks the one formed by the second and third arms 34, 38 Toggle.
  • the plunger 24 is suddenly raised, which means a sudden opening of the contacts of the installation installation switch.
  • the phase shown in FIG. 3 shows the key switch immediately after opening the latch tab 20, FIG. 4 a little later.
  • the automatic release is shown by means of the release pawl 60.
  • the release pawl 60 After pivoting the release pawl 60, in the present case approximately 8 °, the nose 68 of the release pawl 60 and the pawl nose 70 lie next to one another, the pawl 42 can pivot about the nose height in the direction of arrow 88. Because of the pawl hand 44 that has been taken along, the pawl tab 20 disengages and is opened suddenly. The latch group with the latch 42, the latch hand 44 and the release latch 60 is now in the released position.
  • Fig. 6 shows the immediately following switch-off.
  • the latch tab 20 opens suddenly after disengaging in the direction of arrow 82 and lifts the plunger 24 in the direction of arrow 80, which - as with the manual switch-off - a sudden opening of the contacts of the installation switch has the consequence.
  • shift lever (not shown), which is attached to the shift axis 14, is blocked, it can still be switched off; this freewheeling function is guaranteed by the system.

Abstract

In order to switch a switch latch in a fitted installation switch, which switches off in the case of excess current, of electrical low-voltage distribution devices, especially in motor protection switches, means for manually switching off and for automatic tripping are arranged between a board and a chamber (12). For manually switching off, the switching-off force generated on a switch lever is transmitted onto a step (84) of a slide element (52) which can move in the direction of a ratchet element (44), until a ratchet lug (20) unlatches from the pivoting ratchet element (44) and is opened in a sudden manner by means of stored spring force. For automatic tripping, a trip ratchet (60) is pivoted by means of thermal or electromagnetic forces, until its tab (68) rests close to a tab (70) of a ratchet (44), which permits a pivoting movement of the ratchet (42) which is tensioned by spring force. This pivoting movement is transmitted to the ratchet element (44), as a result of which the ratchet lug (20) unlatches. The electrical contacts of the fitted installation switch are opened suddenly in the case of manual and automatic tripping. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Schaltschloss in einem bei Ueberstrom abschaltenden Installationseinbauschalter von elektrischen Niederspannungsverteilnetzen, insbesondere in Motorschutzschaltern, mit zwischen einer Platine und einer Kammer angeordneten Mitteln zum manuellen Abschalten und zur automatischen Auslösung mit dem weiteren Merkmalen gemäss dem ersten Teil des Anspruches 1.The invention relates to a key switch in an installation built-in switch of electrical low-voltage distribution networks which switches off in the event of overcurrent, in particular in motor protection switches, with means for manual switching off and automatic triggering arranged between a circuit board and a chamber, with the further features according to the first part of claim 1.

Alle bekannten Installationseinbauschalter können neben der automatischen Auslösung auch von Hand ausgeschaltet werden, durch Betätigen eines schwenkbaren bzw. kippbaren Handhebels oder eines Druckknopfs. Durch das manuelle Umschalten von der Aus- in die Einschaltposition wird Energie gespeichert. Beim manuellen Ausschalten oder automatischen Auslösen wird die gespeicherte Energie freigesetzt, der Schalter springt in die Ausschaltposition.In addition to the automatic triggering, all known installation built-in switches can also be switched off manually, by actuating a pivotable or tiltable hand lever or a push button. Manual switching from the off to the on position saves energy. When it is switched off manually or triggered automatically, the stored energy is released and the switch jumps to the off position.

Schaltschlösser bekannter Bauart sind so konzipiert, dass beim manuellen Schalten von der Ein- in die Ausposition der Kontakt bzw. die Kontakte in linearer Bewegung kontinuierlich geöffnet wird/werden. Dabei wird die Anpresskraft zweier Kontakte vorerst vermindert und dann diese allmählich voneinander entfernt. Zwischen zwei sich entfernenden Kontaktplättchen entsteht ein Lichtbogen, was nicht nur unerwünscht ist, sondern zu vermehrter Materialabnutzung und weiteren Beeinträchtigungen führt, insbesondere der Kontakte und des Gehäuses aus Kunststoff.Switch locks of known design are designed in such a way that when switching manually from the on to the out position, the contact or the contacts are / are opened continuously in linear motion. The contact pressure of two contacts is initially reduced and then gradually separated from each other. An arc arises between two moving contact plates, which is not only undesirable but also leads to increased material wear and further impairments, in particular of the contacts and the housing made of plastic.

Die sprunghafte Oeffnung von elektrischen Kontaken ganz allgemein wird schon in der GB-A-021800, zu Beginn der Entwicklung von elektrischen Schaltern, mit zwei mittels eines Schaltgriffs gegeneinander verschiebbaren Trommeln beschrieben. Auch nach der EP-A-0062369, welche einen heute üblichen elektrischen Schalter bzw. Strombegrenzer beschreibt, erfolgt das Oeffnen der elektrischen Kontakte sprunghaft und wird mittels eines thermomagnetischen Ausklinkmechanismus und einer Spule ausgelöst.The sudden opening of electrical contacts in general is already described in GB-A-021800, at the beginning of the development of electrical switches, with two drums which can be displaced relative to one another by means of a control handle. Also according to EP-A-0062369, which describes an electrical switch or current limiter customary today, the electrical contacts open suddenly and are triggered by means of a thermomagnetic release mechanism and a coil.

Ein von der Firma CMC Carl Maier + Cie AG, Schaffhausen, hergestelltes Schaltschloss, welches mittels eines Schalthebels manuell betätigbar ist, weist im wesentlichen folgende Baugruppen auf:

  • Eine Laschengruppe mit einem dreiarmig ausgebildeten Kniehebel, wobei ein erster Arm an einem vom Schalthebel betätigten, schwenkbaren Schaltnocken, ein zweiter Arm an einer schwenk- und arretierbaren Klinkenlasche und ein dritter Arm an einem Stössel zur Betätigung des elektrischen Kontaktsystems angelenkt sind. Die sternförmig verteilten Arme sind durch einen zentralen Niet gelenkig zusammengehalten.
  • Eine Klinkengruppe mit einer schwenkbaren Klinke und einer über einen Niet gelenkig mit ihr verbundenen Klinke-Hand, welche eine Rastnase zur Arretierung der Klinkenlasche aufweist.
  • Eine vom Schaltnocken verschiebbare Schieber-Hand mit Mitteln zur Kraftübertragung auf die Klinke-Hand zum manuellen Ausschalten.
  • Eine schwenkbare, mit der Klinke verrastete Auslöseklinke zur automatischen Auslösung. Die Auslöseklinke wird vom Momenten- bzw. Auslöseschieber einer elektromagnetischen Auslösung und allenfalls eines Unterspannungsauslösers oder vom Kompensator eines thermischen Bimetallauslösers betätigt.
A key switch manufactured by CMC Carl Maier + Cie AG, Schaffhausen, which can be operated manually by means of a shift lever, essentially has the following components:
  • A bracket group with a three-armed toggle lever, a first arm being articulated on a pivotable switching cam actuated by the gear lever, a second arm on a pawl latch that can be pivoted and locked, and a third arm on a plunger for actuating the electrical contact system. The arms, which are distributed in a star shape, are held together by a central rivet.
  • A pawl group with a pivotable pawl and a pawl hand articulated to it via a rivet, which has a locking lug for locking the pawl tab.
  • A slider hand that can be moved by the switch cam with means for transmitting power to the ratchet hand for manual switching off.
  • A swiveling release latch for the automatic release. The release pawl is actuated by the moment or release slide of an electromagnetic release and possibly an undervoltage release or by the compensator of a thermal bimetallic release.

Der Erfinder hat sich die Aufgabe gestellt, das vorstehend beschriebene Schaltschloss zum Schalten von Installationseinbauschaltern so weiterzuentwickeln , dass es unabhängig von der Geschwindigkeit der Betätigung des Schalthebels, eine rasche Abschaltung erzeugen und beim automatischen Auslösen die Freilauffunktion erlaubt.The inventor has set himself the task of further developing the switch lock described above for switching installation built-in switches in such a way that, regardless of the speed at which the switch lever is actuated, it generates a rapid shutdown and allows the freewheeling function when triggered automatically.

Die Aufgabe wird erfindungsgemäss nach dem Kennzeichen von Patentanspruch 1 gelöst.The object is achieved according to the characterizing part of claim 1.

Spezielle und weiterbildende Ausführungsformen sind Gegenstand von abhängigen Patentansprüchen.Special and further embodiments are the subject of dependent claims.

Die manuell an einem Schalthebel erzeugte Abschaltkraft wird auf eine Abstufung einer in Richtung einer Klinke-Hand verschiebbaren Schieber-Hand übertragen wird, bis eine Klinkenlasche aus der schwenkenden Klinke-Hand ausrastet und durch gespeicherte Federkraft geöffnet wird. Es kann auch eine automatisch betätigbare Auslöseklinke geschwenkt werden, bis deren Nase neben einer Klinkennase liegt und einer mit Federkraft gespannten Klinke eine der Nasenhöhe entsprechende Schwenkbewegung erlaubt, welche auf die Klinke-Hand übertragen wird. Dadurch wird die Klinkenlasche aus der schwenkenden Klinke-Hand ausrastet und durch gespeicherte Federkraft geöffnet, was eine sprunghafte Oeffnung der elektrischen Kontakte des Installationseinbauschalters bewirkt.The switch-off force generated manually on a shift lever is transferred to a gradation of a slide hand that can be displaced in the direction of a ratchet hand until a ratchet latch disengages from the pivoting ratchet hand and is opened by stored spring force. An automatically actuable release pawl can also be pivoted until its nose lies next to a ratchet nose and a pawl that is tensioned with spring force allows a pivoting movement corresponding to the nose height, which is transferred to the pawl hand. As a result, the latch tab is disengaged from the pivoting latch hand and opened by stored spring force, which causes the electrical contacts of the installation installation switch to open suddenly.

Durch das sprunghafte Oeffnen der elektrischen Kontakte, welches zum sofortigen Unterbruch des durch den Installationseinbauschalter fliessenden Stroms führt, wird ein stehender Lichtbogen verhindert. An den Kontaktplättchen treten bedeutend weniger Abbrandschäden auf, die umliegenden Gehäuseteile aus Kunststoff werden nicht beschädigt.A sudden arc is prevented by the sudden opening of the electrical contacts, which leads to the immediate interruption of the current flowing through the built-in switch. Significantly less erosion damage occurs on the contact plates, the surrounding plastic housing parts are not damaged.

Es ist von wesentlicher Bedeutung, dass das sprunghafte Oeffnen der elektrischen Kontakte weder von der Geschwindigkeit der manuellen Abschaltbewegung noch davon abhängig ist, ob der Schalter in einer bestimmten Stellung festgehalten wird.It is essential that the sudden opening of the electrical contacts does not depend on the speed of the manual switch-off movement or whether the switch is held in a certain position.

Während einer automatischen Auslösung öffnet die Klinkenlasche infolge Ueberstroms oder Unterspannung bei blockiertem Schaltnocken bzw. Schalthebel. die Freilauffunktion ist gewährleistet.During an automatic release, the latch tab opens due to overcurrent or undervoltage when the switching cam or lever is blocked. the freewheel function is guaranteed.

Die Auslöseart (manuell oder elektrisch bei Ueberstrom bzw. Unterspannung) wird zweckmässig nach aussen sichtbar angezeigt.The type of tripping (manual or electrical in the event of overcurrent or undervoltage) is expediently displayed visibly from the outside.

Vorzugsweise ist die Abstufung in der Gleitfläche der Schieber-Hand etwa rechtwinklig ausgebildet. Der mit dem Schaltnocken schwenkende Lagerbolzen kann so die Kraft ohne wesentliche seitliche Komponenten auf die Abstufung übertragen und die Klinke-Hand zum Ausrasten der Klinkenlasche verschieben.Preferably, the gradation in the sliding surface of the slider hand is approximately rectangular. The pivot pin, which swivels with the switch cam, can thus transmit the force to the gradation without essential lateral components and move the pawl hand to disengage the pawl tab.

Die Höhe der Abstufung in der Gleitfläche der Schieber-Hand entspricht bevorzugt etwa dem Durchmesser des Lagerbolzens.The height of the gradation in the sliding surface of the slide hand preferably corresponds approximately to the diameter of the bearing pin.

Nach dem Ausrasten der Klinkenlasche wird die Schieber-Hand vorzugsweise durch eine Zugfeder wieder in die ursprüngliche Position zurückgezogen. Eine gelenkige Verbindung mit der Klinke-Hand bewirkt, dass auch diese wieder in die ursprüngliche Stellung zurückgeführt wird. Diese gelenkige Verbindung wird zweckmässig durch entsprechend angeordnete Bolzen hergestellt.After the latch tab has been disengaged, the slide hand is preferably pulled back into the original position by a tension spring. An articulated connection with the pawl hand means that this too is returned to the original position. This articulated connection is expediently established by appropriately arranged bolts.

Die Erfindung wird anhand der in der Zeichnung dargestellten Ausführungsbeispiele näher erläutert. Die schematischen Ansichten zeigen verschiedene Funktionsstufen eines Schaltschlosses mit abgehobener Platine:

  • Fig. 1 in eingeschalteter Stellung,
  • Fig. 2 in ausgeschalteter Stellung, Handausschaltung
  • Fig. 3 eine Momentaufnahme des manuellen Abschaltens, gleich nach dem Ausrasten der Klinkenlasche,
  • Fig. 4 eine unmittelbar auf Fig. 3 folgende Momentaufnahme mit weiter geöffneter Klinkenlasche,
  • Fig. 5 eine Momentaufnahme der automatischen Auslösung über die Auslöseklinke, und
  • Fig. 6 Kontakte in ausgeschalteter Stellung, bei blockiertem Schalthebel.
The invention is explained in more detail using the exemplary embodiments shown in the drawing. The schematic views show different functional levels of a key switch with the board removed:
  • 1 in the switched on position,
  • Fig. 2 in the off position, manual shutdown
  • 3 shows a snapshot of the manual switch-off, immediately after the latch tab has been disengaged,
  • 4 shows a snapshot immediately following FIG. 3 with the latch tab open further,
  • Fig. 5 is a snapshot of the automatic release via the release pawl, and
  • Fig. 6 contacts in the off position, with the shift lever blocked.

Die funktionellen Teile eines Schaltschlosses 10 sind im wesentlichen zwischen einer Kammer 12 und einer nicht dargestellten Metallplatine angeordnet. Die üblicherweise aus Kunststoff bestehende Kammer wird als Trägerplatte verwendet. Die für das Verständnis der Erfindung nicht wesentlichen Teile dieser Trägerplatte werden weder näher bezeichnet noch erörtert, sie sind für den Fachmann ohne weiteres verständlich.The functional parts of a key switch 10 are essentially between a chamber 12 and one, not shown Metal board arranged. The chamber, which is usually made of plastic, is used as a carrier plate. The parts of this carrier plate which are not essential for the understanding of the invention are neither specified nor discussed, they are readily understandable for the person skilled in the art.

Eine im Querschnitt im wesentlichen quadratisch ausgebildete Schaltachse 14 nimmt einen nicht gezeichneten Schalthebel auf. Ein Nocken des Schalthebels greift beim Aufsetzen in eine Führungsnut 16 ein. Ausserhalb der Metallplatine ist beim arbeitenden Schaltschloss, die Schaltachse 14 umschlingend, eine Torsionsfeder zur Rückstellung des Schalthebels angeordnet. Starr mit der Schaltachse 14 verbunden oder einstückig mit ihr ausgebildet ist ein Schaltnocken 18, welcher der Kraftübertragung auf weitere Bauteile des Schaltschlosses dient.A shift axis 14, which is essentially square in cross section, receives a shift lever (not shown). A cam of the shift lever engages in a guide groove 16 when it is attached. A torsion spring for resetting the shift lever is arranged outside the metal plate when the shift lock is working, wrapping around the shift axis 14. Rigidly connected to the switching axis 14 or integrally formed with it is a switching cam 18 which serves to transmit power to other components of the switching lock.

Die Laschengruppe umfasst im wesentlichen eine Klinkenlasche 20, eine 5-teilige Lasche mit drei vom einem Niet 22 schwenkbar zusammengehaltenen Armen und einen Stössel 24.The tab group essentially comprises a pawl tab 20, a 5-part tab with three arms pivotally held together by a rivet 22 and a plunger 24.

Die abgewinkelt ausgebildete Klinkenlasche 20 ist um die Achse 26 einer Distanzhülse 28 schwenkbar. Durch Federkraft wird die Klinkenlasche 20 bei fehlender Gegenkraft im Gegenuhrzeigersinn geschwenkt.The angled latch tab 20 is pivotable about the axis 26 of a spacer sleeve 28. The spring clip 20 pivots counterclockwise in the absence of counterforce.

Die 5-teilige Lasche überträgt die Schwenkbewegung oder Klinkenlasche 20 in eine auf den Stössel 24 übertragene lineare Bewegung. Der erste, einteilig ausgebildete Arm 30 der 5-teiligen Lasche ist über einen in Richtung des Betrachters verlängert ausgebildeten Lagerbolzen 32 mit dem Schaltnocken 18 gelenkig verbunden. Der zweite Arm 34 der Lasche ist über einen Niet 36 in deren Eckbereich mit der Klinkenlasche 20, ebenfalls gelenkig, verbunden. Der wie der zweite Arm zweiteilig ausgebildete dritte Arm 38 ist über eine Achse 40 mit dem axial bewegbaren Stössel 24 verbunden.The 5-part plate transmits the swivel movement or latch plate 20 into a linear movement transmitted to the plunger 24. The first, one-piece arm 30 of the 5-piece tab is connected in an articulated manner to the switching cam 18 via a bearing pin 32, which is elongated in the direction of the viewer. The second arm 34 of the bracket is connected via a rivet 36 in the corner area thereof to the latch bracket 20, likewise in an articulated manner. The third arm 38, which is formed in two parts like the second arm, is connected to the axially movable plunger 24 via an axis 40.

Der Stössel 24 überträgt die bei der Einschaltbewegung manuell erzeugte Kraft auf ein nicht dargestelltes elektrisches Kontaktsystem bekannter Bauart und allenfalls zusätzlich auf einen Unterspannungsauslöser.The plunger 24 transmits the force generated manually during the switch-on movement to an electrical contact system of a known type, not shown, and possibly additionally to an undervoltage release.

Die Klinkengruppe umfasst im wesentlichen eine Klinke 42 und eine Klinke-Hand 44.The pawl group essentially comprises a pawl 42 and a pawl hand 44.

Die Klinke 42 ist - entsprechend der Klinkenlasche 20 - um eine in einer Distanzhülse 48 angeordnete Achse 46 schwenkbar. Eine nicht gezeigte Torsionsfeder besorgt die Rückführung der Klinke 42 im Uhrzeigersinn.The pawl 42 is - according to the pawl tab 20 - pivotable about an axis 46 arranged in a spacer sleeve 48. A torsion spring, not shown, ensures the return of the pawl 42 in a clockwise direction.

Die Klinke 42 und die Klinke-Hand 44 sind mit einem Niet 50 gegeneinander schwenkbar miteinander verbunden. Bolzensysteme bekannter Bauart besorgen die Kraftübertragung innerhalb der Klinkengruppe.The pawl 42 and the pawl hand 44 are pivotally connected to one another with a rivet 50. Bolt systems of known design ensure the power transmission within the latch group.

Die Schieber-Hand 52 ist um eine Achse 54 innerhalb enger Grenzen schwenkbar. Ein weit abkragender Finger 56 der Schieber-Hand liegt stirnseitig auf dem von Niet 50 abgewandten Ende der Klinke-Hand 44. Die zur manuellen Auslösung des Schaltschlosses 10 mittels des Schaltnockens 18 in Richtung der Klinke-Hand 44 verschiebbare Schieber-Hand 52 ist mit einer Zugfeder 58 zur Rückführung ausgestattet.The slider hand 52 can be pivoted about an axis 54 within narrow limits. A widely protruding finger 56 of the slider hand lies on the end face on the end of the pawl hand 44 facing away from the rivet 50 Tension spring 58 equipped for feedback.

Die automatische Auslösung erfolgt durch eine Auslöseklinke 60, welche um eine Achse 62 wenig, im vorliegenden Fall 8°, schwenkbar ist. Eine Torsionsfeder 64 dient der Rückführung der Auslöseklinke 60. An einem Nocken 66 der Auslöseklinke 60 greift ein nicht dargestellter Kompensator zur Ausführung der leichtgängigen Rotationsbewegung an, welcher Kompensator von den thermischen Auslöseelementen, den Bimetallen, bei Ueberstrom betätigt wird. An einem weiteren Nocken 67 greift ein nicht dargestellter Auslöse- bzw. Momentenschieber an, der die Auslösung bei starkem Ueberstrom des elektromagnetischen Auslösesystems oder einer Unterspannungs-Auslösevorrichtung besorgt.The automatic triggering takes place by means of a trigger pawl 60 which can be pivoted a little about an axis 62, in this case 8 °. A torsion spring 64 is used to return the release pawl 60. A compensator, not shown, acts on a cam 66 of the release pawl 60 to carry out the smooth rotational movement, which compensator is actuated by the thermal release elements, the bimetals, in the event of overcurrent. A trigger or moment slide, not shown, engages on a further cam 67 to provide the trigger in the event of a strong overcurrent of the electromagnetic release system or an undervoltage release device.

Das Schaltschloss 10 weist zwei Verrastungssysteme auf:

  • Die Klinke-Hand 44 und die Klinkenlasche 20 sind durch Rastnasen 72 bzw. 74 miteinander verrastet. Bei einer ausreichenden Schwenkbewegung der Klinke-Hand 44 rastet die Klinkenlasche 20 sprunghaft aus.
  • Die Auslöseklinke 60 und die Klinke 42 sind durch eine Nase 68 der Auslöseklinke 60 und eine Nase 70 der Klinke 42 miteinander verrastet. Bei einer ausreichenden Schwenkbewegung der Auslöseklinke 60 im Gegenuhrzeigersinn liegen die beiden Nasen 68,70 nebeneinander, die Klinke 42 kann entsprechend der Stufenhöhe der Nasen 68,70 im Uhrzeigersinn um die Achse 46 schwenken. Die Klinke-Hand 44 wird dank der gelenkigen Verbindung mit der Klinke 42, derart verschoben, dass die Rastnasen 72,74 ausrasten und Klinkenlasche 20 sprunghaft öffnet.
The key switch 10 has two latching systems:
  • The pawl hand 44 and the pawl tab 20 are locked together by locking lugs 72 and 74, respectively. With a sufficient pivoting movement of the pawl hand 44, the pawl tab 20 disengages suddenly.
  • The release pawl 60 and the pawl 42 are locked together by a nose 68 of the release pawl 60 and a nose 70 of the pawl 42. With a sufficient pivoting movement of the release pawl 60 in the counterclockwise direction, the two lugs 68, 70 lie side by side, the pawl 42 can pivot clockwise around the axis 46 in accordance with the step height of the lugs 68, 70. Thanks to the articulated connection with the pawl 42, the pawl hand 44 is displaced in such a way that the latching lugs 72, 74 disengage and the pawl tab 20 opens suddenly.

Die Ausrastung wird eingeleitet durch eine Bewegung der Schieber-Hand 52, welcher direkt mit der Klinke-Hand 44 in Eingriff steht (manuelle Auslösung) oder durch die Klinke 42, welche ihre Schwenkbewegung über den Niet 50 auf die Klinke-Hand 44 überträgt (automatische bzw. elektrische Auslösung).The disengagement is initiated by a movement of the slide hand 52, which is directly engaged with the pawl hand 44 (manual release) or by the pawl 42, which transfers its pivoting movement to the pawl hand 44 via the rivet 50 (automatic or electrical release).

In Fig. 1, der eingeschalteten Stellung des Schaltschlosses 10, ist die Klinkenlasche 20 über ihre Rastnase 74 an der Rastnase 72 der Klinke-Hand 44 eingerastet. Ebenso rastet die Nase 68 der Auslöseklinke 60 an der Nase 70 der Klinke 42 ein. Der zweite Arm 34 und der dritte Arm 38 der 5-teiligen Lasche bilden einen praktisch gestreckten Winkel, der Stössel 24 ist deshalb weit nach unten gedrückt. Die Kontakte des Installationseinbauschalters sind geschlossen.In Fig. 1, the switched-on position of the switch lock 10, the latch tab 20 is latched via its latch 74 on the latch 72 of the latch hand 44. Likewise, the nose 68 of the release pawl 60 engages on the nose 70 of the pawl 42. The second arm 34 and the third arm 38 of the 5-part tab form a practically elongated angle, the plunger 24 is therefore pressed far down. The contacts of the installation built-in switch are closed.

In Fig. 2, der von Hand bewirkten Ausschaltstellung des Schaltschlosses 10, ist der Schaltnocken um 90° gedreht, was auch an der Stellung der Führungsnut 16 erkennbar ist. Der erste Arm 30 hat den Niet 22 mitgezogen, der zweite Arm 34 und der dritte Arm 38 bilden nunmehr einen fast rechten Winkel. Der Stössel 24 ist angehoben, weshalb die Kontakte des Installationseinbauschalters zwangsmässig geöffnet sind. Die Rastnase 74 der Klinke 20 liegt nicht mehr an der Rastnase 72 der Klinkenhand an.In Fig. 2, the switch-off position of the Switch lock 10, the switching cam is rotated by 90 °, which can also be seen from the position of the guide groove 16. The first arm 30 has pulled the rivet 22 along, the second arm 34 and the third arm 38 now form an almost right angle. The plunger 24 is raised, which is why the contacts of the installation installation switch are forcibly opened. The detent 74 of the pawl 20 is no longer in contact with the detent 72 of the pawl hand.

In den Fig. 3 und 4 werden zwei Phasen der manuellen Auslösung dargestellt. Gemäss Fig. 3 ist der Schalthebel, und damit die Schaltachse 14 und der Schaltnocken 18 in Richtung des Pfeils 76 geschwenkt worden. Der Schaltnocken 18 hat die Schieber-Hand 52, wegen des an der Abstufung 84 (Fig. 2) anstehenden Lagerbolzens 32, in Richtung der Klinke-Hand 44 verschoben (Pfeil 78) und dabei die Verrastung zwischen der Rastnase 72 der Klinke-Hand 74 und der Rastnase 74 der Klinke 42 allmählich gelöst. Die Mitnahme des Niets 22 und damit des zweiten und dritten Arms, 34, 38 bewirkt praktisch keine Bewegung des Stössels in Richtung des Pfeils 80.3 and 4, two phases of manual triggering are shown. 3, the shift lever, and thus the shift axis 14 and the shift cam 18, have been pivoted in the direction of arrow 76. The switching cam 18 has moved the slider hand 52, because of the bearing bolt 32 that is present at the step 84 (FIG. 2), in the direction of the pawl hand 44 (arrow 78) and thereby the latching between the latching nose 72 of the pawl hand 74 and the latch 74 of the pawl 42 gradually released. The entrainment of the rivet 22 and thus of the second and third arms, 34, 38 causes practically no movement of the ram in the direction of arrow 80.

Wird die Verrastung gelöst, so öffnet sich die Klinkenlasche 20 sprunghaft in Richtung des Pfeils 82. Gleichzeitig springt der Schaltnocken 18 über die Abstufung 84 (Fig. 2) in der Schieber-Hand 52 und knickt den vom zweiten und dritten Arm 34, 38 gebildeten Kniehebel. Dadurch wird der Stössel 24 schlagartig hochgezogen, was eine sprunghafte Oeffnung der Kontakte des Installationseinbauschalters bedeutet.If the latching is released, the latch tab 20 opens abruptly in the direction of the arrow 82. At the same time, the switching cam 18 jumps over the step 84 (FIG. 2) in the slide hand 52 and kinks the one formed by the second and third arms 34, 38 Toggle. As a result, the plunger 24 is suddenly raised, which means a sudden opening of the contacts of the installation installation switch.

Die in Fig. 3 dargestellte Phase zeigt das Schaltschloss unmittelbar nach dem Oeffnen der Klinkenlasche 20, Fig. 4 wenig später.The phase shown in FIG. 3 shows the key switch immediately after opening the latch tab 20, FIG. 4 a little later.

Bei der in den Fig. 3 und 4 gezeigten manuellen Auslösung des Schaltschlosses 10 tritt die automatische Auslösung mittels der Auslöseklinke 60 nicht in Funktion.In the case of the manual triggering of the switch lock 10 shown in FIGS. 3 and 4, the automatic triggering by means of the trigger pawl 60 does not function.

In Fig. 5 wird die automatische Auslösug mittels der Auslöseklinke 60 dargestellt. Nach dem Schwenken der Auslöseklinke 60, im vorliegenden Fall etwa um 8°, liegen die Nase 68 der Auslöseklinke 60 und die Klinkennase 70 nebeneinander, die Klinke 42 kann um die Nasenhöhe in Richtung des Pfeils 88 schwenken. Wegen der mitgenommenen Klinke-Hand 44 rastet die Klinkenlasche 20 aus und wird sprunghaft geöffnet. Die Klinkengruppe mit der Klinke 42, der Klinke-Hand 44 und der Auslöseklinke 60 ist nun in ausgelöster Stellung.In Fig. 5, the automatic release is shown by means of the release pawl 60. After pivoting the release pawl 60, in the present case approximately 8 °, the nose 68 of the release pawl 60 and the pawl nose 70 lie next to one another, the pawl 42 can pivot about the nose height in the direction of arrow 88. Because of the pawl hand 44 that has been taken along, the pawl tab 20 disengages and is opened suddenly. The latch group with the latch 42, the latch hand 44 and the release latch 60 is now in the released position.

Fig. 6 stellt den unmittelbar anschliessenden Ausschaltvorgang dar. Die Klinkenlasche 20 öffnet sich nach dem Ausrasten schlagartig in Richtung des Pfeils 82 und hebt den Stössel 24 in Richtung des Pfeils 80, was - wie bei der manuellen Ausschaltung - eine sprunghafte Oeffnung der Kontakte des Installationseinbauschalters zur Folge hat.Fig. 6 shows the immediately following switch-off. The latch tab 20 opens suddenly after disengaging in the direction of arrow 82 and lifts the plunger 24 in the direction of arrow 80, which - as with the manual switch-off - a sudden opening of the contacts of the installation switch has the consequence.

Bei blockiertem Schalthebel (nicht dargestellt), der auf der Schaltachse 14 angebracht ist, kann trotzdem ein Ausschalten erfolgen, diese Freilauffunktion ist mit dem System gewährleistet. Eine nicht dargestellte Torsionsfeder um die Schaltachse 14 bringt den Schalthebel in die Aus-Stellung.If the shift lever (not shown), which is attached to the shift axis 14, is blocked, it can still be switched off; this freewheeling function is guaranteed by the system. A torsion spring, not shown, about the shift axis 14 brings the shift lever into the off position.

Nach erfolgtem Ausschaltvorgang gehen alle Teile der Klinkengruppen wieder in ihre Ausgangsposition nach Fig. 2 zurück, angedeutet durch die Pfeile 90, 92; der Schalter ist für ein Wiedereinschalten bereit.After the switch-off process has taken place, all parts of the latch groups return to their starting position according to FIG. 2, indicated by the arrows 90, 92; the switch is ready to be switched on again.

Claims (6)

  1. Latching mechanism in a flush-mounted installation circuit breaker, which switches off in the event of overcurrent, of electrical low-voltage distribution systems, especially in motor-protection circuit breakers, having means which are arranged between a board and a chamber (12) for manual disconnection and for automatic tripping, which latching mechanism (10) comprises:
    - a switching cam (18) which can be pivoted by means of a switching lever,
    - a lug group having a toggle lever which is constructed with three arms, a first arm (30) being articulated on the switching cam (18), a second arm (34) being articulated on a latching lug (20) which can be pivoted and can be locked, and a third arm (38) being articulated on a plunger (24) for operating the electrical contact system, and the three arms being held together in an articulated manner by means of a central rivet (22),
    - a latch group having a latch (42) which can be pivoted and having a latch hand (44) which is connected to said latch (42) via a rivet (50) such that it can pivot and has a latching tab (72) for locking the latching lug (20),
    - a slide hand (52), which can be displaced by the switching cam (18) and has means for transmitting force to the latch hand (44) for manual switching off, and
    - a tripping latch (60), which can be pivoted by means of a moment slide of an electromagnetic trip device or of a compensator of a thermal bimetallic trip device and is latched with the latch (42), for automatic tripping,
    characterised in that
    a bearing bolt (32) of the first arm (30) of the lug group is constructed in an extended manner in the switching cam (18), the slide hand (52) has a sliding surface with a step (84) on which the bearing bolt (32) rests such that it can displace the slide hand (52) in the direction of the latch hand (44) during manual switching off, and the tripping latch (60) and latch (42) have tabs (68, 70) which can latch and, while unlatching, allow a pivoting movement of the latch (42) with the latch hand (44).
  2. Latching mechanism according to Claim 1, characterised in that the step (84) is constructed approximately at right angles in the sliding surface of the slide hand (52), and the height of the step (84) in the sliding surface of the slide hand (52) preferably corresponds approximately to the diameter of the bearing bolt (32).
  3. Latching mechanism according to Claim 1 or 2, characterised in that the slide hand (52) has a tension spring (58) for return guidance and, in the direction of the latch hand (44), preferably has a bevelled finger (56).
  4. Latching mechanism according to one of Claims 1 - 3, characterised in that the slide hand (52) can be pivoted to a small extent, limited on both sides, and preferably has a bolt for return guidance of the latch hand (44) and of the latch (42).
  5. Latching mechanism according to one of Claims 1 - 4, characterised in that the extended bearing bolt (32) and the slide hand (52) are composed of plastic.
  6. Latching mechanism according to one of Claims 1 - 5, characterised in that it is equipped with means, preferably a signal contact, for externally visible display of the type of tripping.
EP89810071A 1988-02-05 1989-01-26 Switch latch of a fitted installation switch Expired - Lifetime EP0327502B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810071T ATE91043T1 (en) 1988-02-05 1989-01-26 SWITCH LOCK IN AN INSTALLATION BUILT-IN SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH41688 1988-02-05
CH416/88 1988-02-05

Publications (2)

Publication Number Publication Date
EP0327502A1 EP0327502A1 (en) 1989-08-09
EP0327502B1 true EP0327502B1 (en) 1993-06-23

Family

ID=4186537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810071A Expired - Lifetime EP0327502B1 (en) 1988-02-05 1989-01-26 Switch latch of a fitted installation switch

Country Status (4)

Country Link
EP (1) EP0327502B1 (en)
AT (1) ATE91043T1 (en)
DE (1) DE58904757D1 (en)
ES (1) ES2043088T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104993368A (en) * 2015-07-21 2015-10-21 湖北捷讯光电有限公司 Femtosecond laser toggle light outlet switch

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10139917A1 (en) 2001-08-14 2003-02-27 Abb Patent Gmbh Switch lock for an electrical switching device, in particular for a motor protection switch
DE102005044540A1 (en) * 2005-09-17 2007-03-22 Abb Patent Gmbh Electrical service switching device
DE102015116493B4 (en) 2015-09-29 2021-10-07 Eaton Intelligent Power Limited Circuit breaker

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191121800A (en) * 1911-10-03 1912-08-08 William Brabiner Bennitt Improvements in Controllers for Electric Motors.
GB224980A (en) * 1923-08-29 1924-11-27 English Electric Co Ltd Improvements in electric circuit breakers
DE468987C (en) * 1925-01-31 1928-12-04 Otto Dreyer Dipl Ing Automatic switch with free release
CH358498A (en) * 1958-06-05 1961-11-30 Maier & Cie C Electric switch
DE1254219B (en) * 1964-02-06 1967-11-16 Continental Elektro Ind Ag Snap switch mechanism for electrical switches
IT1137121B (en) * 1981-04-02 1986-09-03 Sace Spa ELECTRIC SWITCH, PARTICULARLY CURRENT LIMITER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104993368A (en) * 2015-07-21 2015-10-21 湖北捷讯光电有限公司 Femtosecond laser toggle light outlet switch
CN104993368B (en) * 2015-07-21 2018-01-09 湖北捷讯光电有限公司 A kind of femto-second laser dial type goes out photoswitch

Also Published As

Publication number Publication date
ATE91043T1 (en) 1993-07-15
ES2043088T3 (en) 1993-12-16
DE58904757D1 (en) 1993-07-29
EP0327502A1 (en) 1989-08-09

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