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EP0795187A1 - Lock for a low-voltage switch - Google Patents

Lock for a low-voltage switch

Info

Publication number
EP0795187A1
EP0795187A1 EP95939272A EP95939272A EP0795187A1 EP 0795187 A1 EP0795187 A1 EP 0795187A1 EP 95939272 A EP95939272 A EP 95939272A EP 95939272 A EP95939272 A EP 95939272A EP 0795187 A1 EP0795187 A1 EP 0795187A1
Authority
EP
European Patent Office
Prior art keywords
lever
lock
switch
release lever
switching
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
EP95939272A
Other languages
German (de)
French (fr)
Other versions
EP0795187B1 (en
Inventor
Volker Heins
Bogdan Zabrocki
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.)
Eaton Industries GmbH
Original Assignee
Kloeckner Moeller GmbH
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 Kloeckner Moeller GmbH filed Critical Kloeckner Moeller GmbH
Publication of EP0795187A1 publication Critical patent/EP0795187A1/en
Application granted granted Critical
Publication of EP0795187B1 publication Critical patent/EP0795187B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • 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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
    • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms

Definitions

  • the invention relates to a switch lock for a low-voltage switching device, in particular one
  • Circuit breaker or a load break switch with housing with a switching link pivotably mounted in the housing by means of an operating part for switching on and off, with two toggle levers connected to one another via an axis, which can be pivoted counter to the
  • Switch locks of the generic type are known for example from DE 42 27 213 AI.
  • the content of DE 42 27 213 is included in the present application.
  • the invention has for its object to enable a higher contact force without the need for a stronger lock spring.
  • a rotatable about a fixed axis under the action of a bias spring standing release lever is provided which by means of at least one latching stop in the path of movement of the control shaft intervenes and the release of the movement path is carried out by actuating the release lever by means of the control unit, such that when the switch-on operation is carried out by means of the control unit, the movement of the selector shaft for closing the contacts is only released after the theoretical tilt point of the lock spring has been exceeded.
  • a pre-tensioned release lever which locks with a latching surface - latching stop of the selector shaft, which comprises the contact apparatus.
  • This release lever is controlled depending on the position of the control panel, i.e. released, such that the release takes place only after the theoretical tipping point of the lock spring is exceeded.
  • the control shaft is therefore latched beyond the theoretical tipping point and the release takes place only via the movement of the control panel, i.e. with progressive movement of the control panel with the aid of a stop bar coupled with the movement of the control panel, which releases the release lever at the desired time and position of the key switch and permits the contacts to be switched on via the control shaft.
  • the rocker arm of the switching device if this is designed as a toggle switch, or the control handle of a rotary actuator can be used as the control unit in the sense of the invention.
  • the invention enables the tipping point to
  • Stabilizing the switching shaft by coordinating the paths of the shift gate with the release lever, i.e. to be limited to a narrow tolerance level, so that dependent functions, such as auxiliary switches, undervoltage releases can be designed more reliably.
  • the invention enables switching on by moving the tipping point beyond the theoretical tipping point backwards, i.e. the contacts are switched on safely later. In this way, the security is increased that in particular leading auxiliary switches are switched on, which must be switched before the tipping point is reached, since more time is also available for switching on the auxiliary switches.
  • the invention therefore saves time by moving the tipping point backwards, which has a positive effect on the safe switching of auxiliary switches as well as undervoltage releases.
  • Undervoltage release with armature and magnetic field works, there must be enough time, when the voltage at the undervoltage release is present, to build up a magnetic field until the contacts are closed by means of the switching shaft of the key switch to unlock the switch.
  • By moving the tilt point of the key switch to the rear gained so much time, with certainty that an undervoltage release can build up a magnetic field and can unlock it with certainty.
  • the release lever is rotatably arranged in the switching lock about the stationary axis about which the support lever is pivotally mounted. Shifting gate,
  • Support lever, release lever have approximately U-shaped shape and are thus easy to arrange and move against each other.
  • the toggle lever also essentially forms a U-shape through the axis connecting the two levers, which can be inserted and moved in the space enclosed by the shifting gate.
  • the latching surface between the release lever and the selector shaft which is intended to prevent premature movement of the selector shaft and closing of the contacts when switching on, is preferably formed on a cam formed on the selector shaft by means of a radially protruding at least one stop lug, which is connected to the at least one latching stop of the release lever cooperates.
  • the rocker arm serving as the operating part of a rocker arm holder which is firmly connected to the shift gate, is formed with a stop bar which, when the desired release position for the movement of the shift shaft for closing the contacts is reached strikes the release lever and takes it with it, whereby the latching between the release lever and the selector shaft is released and the selector shaft can close the contacts with certainty.
  • Fig. 2 shows a schematic side view of the switch lock of Fig. 1 in the switched-on state
  • Fig. 3 shows a schematic side view of the switch lock according to Fig. 1 in the switched-off state without ratchet lever device
  • Fig. 6a-d schematic representation of the function of the key switch in the different switching positions of off, theoretical tipping point, real tipping point and on
  • Fig. 7a-c representation of the release lever in three views.
  • the switch lock 1 is shown as it is used as part of a circuit breaker in a mold housing, not shown.
  • the switch lock is shown without the switching shaft carrying the movable contacts.
  • the switch lock 1 consists of the two side lock plates 21 with which it is fixed in the mold housing, not shown.
  • the switch lock 1 includes the switching link 11, which is U-shaped and is pivotally mounted with the two U-legs in a bearing 27 of the lock plate 21, and two toggle levers 19, which are firmly connected to one another by means of the toggle lever axis 13, which are helical Lock spring 12 and the latching device with pawl lever 23, pawl spring 24 and pawl 25 and the release lever 16 with biasing spring 17, see FIGS.
  • the switching link 11 is essentially U-shaped with the two lateral legs 11c and 11b, which are pivotally mounted in the recess 27 of the lock plates 1 in the direction of arrow P1.
  • the rocker arm 11a is formed above on the web of the shift link 11 connecting the two legs 11c, 11b.
  • the U-shaped support lever 22 is arranged within the shifting link 11 and is pivotably supported with two lateral legs against the force of the lock spring 12 on two bearing rivets 29 attached to the inside of the lock plates 21, which form a stationary axis 29 for pivoting the support lever 22.
  • the support lever 22 is switched from the triggered to the switched off
  • the two same toggle levers 19 are firmly connected at one end to the toggle lever axis 13 and are kept at a distance.
  • the lock spring engages in the middle of the toggle lever axis 13, see bearing point 12b, and with its other end, see bearing point 12a, in the upper region of the
  • the toggle levers 19, which are spaced apart by the toggle lever axis 13, are guided laterally by a guide cam 33 formed on the lateral legs of the support lever 22.
  • the pawl 25 is pivotally mounted laterally in the lock plates 21.
  • the pawl lever 23 is also pivotally mounted with lateral projections in recesses 26 in the lock plates 21.
  • the helical pawl spring 24 is suspended between pawl 25 and pawl lever 23 under slight tension.
  • the support lever 22 has in the middle an arm 22a projecting from the U-shaped area, on which a locking surface 221 is formed, which in the switched-off and in the switched-on state of the switch lock 1 is in operative connection with the
  • Latching device stands.
  • the latching device is described by way of example in DE 42 27 213 AI.
  • the switching shaft not shown, which carries the contact arms with the movable contact pieces, is rotatably mounted on the housing of the circuit breaker and is guided through the bearing points 28 of the lock plates 21.
  • the release lever 16 with a shape as shown in FIGS. 7a-c is also rotatably mounted on the bearing rivets forming the fixed axis 29, which are attached to the inside of the lock plates 21.
  • the release lever 16 is also under slight bias of the bias spring 17, which has, for example, the second abutment on the housing.
  • the release lever 16 On the side facing away from the biasing spring 17, i.e. the side facing the selector shaft, the release lever 16 has the latching stops 161.
  • the control part of the shifting gate namely the rocker arm 11a is firmly connected to a rocker arm holder 10.
  • the rocker arm holder 10 has on its underside a stop bar 10a with which it comes into operative connection with the release lever, ie with the stop projection 162, in a certain position of the pivoting movement P1 of the shifting link 11.
  • the toggle lever axis 13 is guided in a bearing 30 which is formed on the selector shaft, not shown.
  • This is a storage track, i.e. the toggle lever axis 30 is mounted in a variable position and it moves with the movement of the shifting gate in the cam track, as can also be seen from a comparison of FIGS. 2 and 3.
  • the release lever 16 also has an essentially U-shaped shape with lateral legs 164 which, via a connecting web 162, which at the same time is the stop web for establishing the operative connection with the stop web of the operating part, i.e. Rocker arm holder forms.
  • latching surfaces 161 are formed which abut corresponding locking surfaces or stop lugs which are formed on the selector shaft and block the movement of the selector shaft.
  • 6a-6d the functional sequence of the key switch with release lever and contact system is shown schematically, wherein the parts relating to the latching device including the support lever have been omitted when considering.
  • 6a shows the off position of the key switch.
  • the contact apparatus with the switching shaft 20, the contact arms 71, which support the movable contact pieces 70 and the stationary contact pieces 80 are shown.
  • Two protruding cams 15 are formed on the control shaft 20, each of which is formed with a cam slot 14 which forms the cam track for the toggle lever axis 13 guided therein.
  • the projecting stop lug 151 is formed, which comes into operative connection with the latching stops 161 of the release lever 16. In the shown off position according to FIG.
  • Fig. 6a shows the position when the theoretical tilt point of the lock spring 12 is reached. In this position, the release lever 16 comes into operative connection with the control shaft 20 by the latching stop 161 striking the stop lug 151 of the control shaft and thus blocking movement of the control shaft in the direction of arrow P3.
  • Fig. 6c shows that when the shift gate 11 is moved further by the operating part 11a, 10 in the direction of arrow P2, the theoretical tipping point according to Fig. 6b is exceeded and after a path corresponding to the dimensioning of the release lever 16 and the stop lug 151, the release lever 16 is out the latching with the stop lug 151 of the selector shaft 20 releases and migrates in the direction of arrow P.
  • the migration of the release lever 16 in the direction of arrow P is effected in that the stop bar 10a on the underside of the rocker arm holder 10 of the operating part, when the shifting gate 11 moves in the arrow direction P2, hits the stop bar 162 of the release lever 16 and takes it along, thereby releasing the stop nose 151 at the other end of the
  • Release lever 16 takes place in the area of the web 161. After the release of the control shaft 20, ie after releasing the operative connection between the release lever 16 and the Stop lug 151, the switching shaft 20 can move suddenly in the direction of arrow P3, see FIG. 6, under the action of the lock spring 12 and close the contacts 70, 80, with increased contact pressure.
  • FIGS. 6b and 6c show that there is a difference between the theoretical tipping point and the controlled tipping point (position with respect to the axes X of the lock spring 12) and the difference in the distance between these two tipping point positions includes the shifting of the tipping point to the rear, as a result of which Security of switching the lock is increased.
  • the tipping point to the rear through the locking by means of the release lever 16 at the time of the theoretical tipping point, sufficiently high forces always act on the contacts to close them with certainty, so that a safe switch-on position according to FIG. 6d is reached becomes.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Electronic Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Lock And Its Accessories (AREA)
  • Mechanisms For Operating Contacts (AREA)

Abstract

The invention concerns a lock for a power switch, the lock having a gate, two elbow levers connected to each other by a spindle, a spiral locking spring and a release arm which controls the tipping point and hence the release of the switch shaft.

Description

Beschreibung description
Schaltschloß für ein Niederspannungs-SchaltgerätSwitch lock for a low-voltage switchgear
Die Erfindung betrifft ein Schaltschloß für ein Niederspannungs-Schaltgerät, insbesondere einenThe invention relates to a switch lock for a low-voltage switching device, in particular one
Leistungsschalter oder einen Lasttrennschalter, mit Gehäuse mit einer mittels eines Bedienteiles zwecks Ein- und Ausschalten bewegbaren schwenkbar im Gehäuse gelagerten Schaltkulisse, mit zwei über einer Achse miteinander verbundenen Kniehebeln, die schwenkbar entgegen derCircuit breaker or a load break switch, with housing with a switching link pivotably mounted in the housing by means of an operating part for switching on and off, with two toggle levers connected to one another via an axis, which can be pivoted counter to the
Kraftwirkung einer Schloßfeder gelagert sind, wobei das verschwenkbare, die Kniehebelachse umfassende Ende der Kniehebel an einer im Gehäuse drehbar gelagerten Schaltwelle, die mit bewegbaren Kontaktstücken ausgestattet ist, angelängt ist, und wobei die Schloßfeder zwischen Schaltkulisse und Kniehebelachse angeordnet ist .Force action of a lock spring are mounted, wherein the pivotable end of the toggle lever encompassing the toggle lever is attached to a rotatably mounted switching shaft in the housing, which is equipped with movable contact pieces, and the lock spring is arranged between the switching link and the toggle lever axis.
Schaltschlösser der gattungsgemäßen Art sind beispielsweise aus der DE 42 27 213 AI bekannt. Der Inhalt der DE 42 27 213 wird in die vorliegende Anmeldung mit eingeschlossen.Switch locks of the generic type are known for example from DE 42 27 213 AI. The content of DE 42 27 213 is included in the present application.
In der DE 42 27 213 AI ist ein zuverlässig öffnendes Schaltschloß beschrieben, das Vorteile bei der Herstellung durch eine entsprechende Konstruktion aufweist . Insbesondere bilden die Schaltkulisse, die Kniehebel und die Schloßfeder ein einfaches, jedoch wirksames Kippsprungwerk. Es ist bei Niederspannungs-Schaltgeräten in vielen Fällen anzustreben, die Schalteigenschaften durch Erhöhung der Kontaktkraft zwischen den Kontaktstücken zu verbessern. Dem steht das begrenzte Kraftangebot des Schaltschlosses entgegen.DE 42 27 213 AI describes a reliably opening switch lock which has advantages in the manufacture by means of a corresponding construction. In particular, the shifting gate, the toggle lever and the lock spring form a simple but effective toggle mechanism. With low-voltage switchgear, the aim in many cases is to improve the switching properties by increasing the contact force between the contact pieces. This is countered by the limited power supply of the key switch.
Es wurde auch festgestellt, daß bei Schaltschlössern bekannter Bauweise, wie beispielsweise aus der DE 42 27 213 AI bekannt, der Kippunkt zum Einschalten des Schaltschlosses, bestimmt durch die Schloßfeder, unter deren Krafteinwirkung die Kniehebel am Stützhebel gelagert sind, bedingt durch Reibung und Fertigungstoleranzen streuen kann, und zwar bis hin in unerwünschte Bereiche. Streut der Kippunkt in Richtung "zu früh", so kann es vorkommen, daß die Federvorspannung der Schloßfeder noch nicht ausreichend ist, um die Schaltwelle mit den Kontakten voll durchzuschalten. Dieses wiederum kann zu fehlerhaften Kontaktierungen im Schaltgerät selbst führen und damit zu Fehlern im elektrischen Verhalten der angeschlossenen Systeme. Da auch in Abhängigkeit der Stellung des Kipphebels des Schaltschlosses Hilfseinrichtungen, beispielsweise Hilfsschalter, betätigt werden, erschwert eine starke Streuung des Kippunktes, d.h. die zeitliche und logische Koordinierung der Ansteuerpunkte der Hilfseinrichtungen.It was also found that in switch locks of known design, such as known from DE 42 27 213 AI, the tipping point for switching on the switch lock, determined by the lock spring, under the action of which the toggle levers are mounted on the support lever, due to friction and manufacturing tolerances can, even in undesirable areas. If the tipping point scatters in the direction "too early", it may happen that the spring preload of the lock spring is not yet sufficient to fully switch the selector shaft with the contacts. This in turn can lead to incorrect contacts in the switching device itself and thus to errors in the electrical behavior of the connected systems. Since auxiliary devices, for example auxiliary switches, are also actuated as a function of the position of the rocker arm of the switch lock, a heavy spreading of the tilt point, i.e. the temporal and logical coordination of the control points of the auxiliary facilities.
Wird ein Schaltschloß langsam eingeschaltet, so kann es vorkommen, daß infolge der Reibung die Schaltwelle nicht die dynamische Energie entfaltet, die erforderlich ist, um die Kontakte vollständig zu schließen. Auch dies führt zu Fehler im elektrischen Verhalten des Systems.If a key switch is switched on slowly, it can happen that the switching shaft does not develop the dynamic energy required to fully close the contacts due to the friction. This also leads to errors in the electrical behavior of the system.
Der Erfindung liegt die Aufgabe zugrunde, eine höhere Kontaktkraft zu ermöglichen, ohne dafür eine stärkere Schloßfeder zu benötigen.The invention has for its object to enable a higher contact force without the need for a stronger lock spring.
Diese Aufgabe wird bei einem gattungsgemäßen Schaltschloß dadurch gelöst, daß ein um eine ortsfeste Achse drehbarer unter der Kraf einwirkung einer Vorspannfeder stehender Freigabehebel vorgesehen ist, der mittels mindestens eines Verklinkungsanschlages in die Bewegungsbahn der Schaltwelle eingreift und die Freigabe der Bewegungsbahn durch Ansteuern des Freigabehebels mittels des Bedienteils erfolgt, dergestalt, daß beim Einschaltvorgang mittels des Bedienteils die Bewegung der Schaltwelle zum Schließen der Kontakte erst nach Überschreiten des theoretischen Kippunktes der Schloßfeder freigegeben wird.This object is achieved in a generic switch lock in that a rotatable about a fixed axis under the action of a bias spring standing release lever is provided which by means of at least one latching stop in the path of movement of the control shaft intervenes and the release of the movement path is carried out by actuating the release lever by means of the control unit, such that when the switch-on operation is carried out by means of the control unit, the movement of the selector shaft for closing the contacts is only released after the theoretical tilt point of the lock spring has been exceeded.
Erfindungsgemäß wird also ein vorgespannter Freigabehebel vorgesehen, der mit einer Verklinkungsfläche - Verklinkungs- anschlag der Schaltwelle, die den Kontaktapparat umfaßt - sperrt. Dieser Freigabehebel wird in Abhängigkeit von der Stellung des Bedienteiles angesteuert, d.h. freigegeben, dergestalt, daß die Freigabe erst nach Überschreiten des theoretischen Kippunktes der Schloßfeder erfolgt. Erfindungsgemäß ist es also möglich, den theoretischen Kippunkt zu überfahren und erst danach einen sogenannten "gesteuerten Kippunkt" zur Auslösung des Einschaltens der Schaltwelle, d.h. der Bewegung der Schaltwelle zum Einschalten der Kontakte zu benutzen. Erfindungsgemäß ist also die Schaltwelle über den theoretischen Kippunkt hinaus verklinkt und die Freigabe erfolgt erst über die Bewegung des Bedienteils, d.h. mit fortschreitender Bewegung des Bedienteils mit Hilfe eines mit der Bewegung des Bedienteils gekoppelten Anschlagsteges, der zu dem gewünschten Zeitpunkt und Stellung des Schaltschlosses den Freigabehebel ausklinkt und das Einschalten der Kontakte über die Schaltwelle zuläßt.According to the invention, a pre-tensioned release lever is thus provided, which locks with a latching surface - latching stop of the selector shaft, which comprises the contact apparatus. This release lever is controlled depending on the position of the control panel, i.e. released, such that the release takes place only after the theoretical tipping point of the lock spring is exceeded. According to the invention, it is therefore possible to pass the theoretical tipping point and only afterwards a so-called "controlled tipping point" to trigger the switching shaft to be switched on, i.e. the movement of the selector shaft to switch on the contacts. According to the invention, the control shaft is therefore latched beyond the theoretical tipping point and the release takes place only via the movement of the control panel, i.e. with progressive movement of the control panel with the aid of a stop bar coupled with the movement of the control panel, which releases the release lever at the desired time and position of the key switch and permits the contacts to be switched on via the control shaft.
Als Bedienteil im Sinne der Erfindung kann beispielsweise der Kipphebel des Schaltgerätes, wenn dieser als Kippschalter ausgebildet ist, oder der Bediengriff eines Drehantriebes verwendet werden.For example, the rocker arm of the switching device, if this is designed as a toggle switch, or the control handle of a rotary actuator can be used as the control unit in the sense of the invention.
Mit der Erfindung werden Durchschaltproble e der Schaltwelle und der Kontakte durch zu frühes Loslaufen, d.h. vorzeitiges Auslösen des Kippunktes der Schloßfeder verhindert. Dadurch, daß die Auslösung des Kippunktes der Schloßfeder nach dem theoretischen Kippunkt verlegt wird, werden die Hebelverhältnisse hinsichtlich der durch die Schloßfeder aufgebrachten Kräfte verbessert, und damit erhöhen sich die Einschaltkräfte, wenn die Schaltwelle freigegeben wird, um die Einschaltbewegung durchführen zu können.With the invention, switching problems of the selector shaft and the contacts are prevented by starting too early, ie prematurely triggering the tilt point of the lock spring. Because the triggering of the tipping point of the lock spring is relocated to the theoretical tipping point, the leverage ratios with respect to those caused by the lock spring applied forces improved, and thus the engagement forces increase when the selector shaft is released in order to be able to perform the engagement movement.
Des weiteren ermöglicht die Erfindung, den Kippunkt zumFurthermore, the invention enables the tipping point to
Einschalten der Schaltwelle durch die Koordinierung der Wege der Schaltkulisse mit dem Freigabehebel zu stabilisieren, d.h. auf ein enges Toleranzmaß einzugrenzen, so daß davon abhängige Funktionen, wie Hilfsschalter, Unterspannungsauslöser zuverlässiger ausgelegt werden können.Stabilizing the switching shaft by coordinating the paths of the shift gate with the release lever, i.e. to be limited to a narrow tolerance level, so that dependent functions, such as auxiliary switches, undervoltage releases can be designed more reliably.
Die Erfindung ermöglicht die Verlegung des Einschaltens durch die Verlegung des Kippunktes über den theoretischen Kippunkt hinaus nach hinten, d.h. das sichere Einschalten der Kontakte erfolgt später. Auf diese Weise wird die Sicherheit, daß inbesondere voreilende Hilfsschalter eingeschaltet sind, die vor Erreichen des Kippunktes geschaltet werden müssen, erhöht, da auch für die Einschaltung der Hilfsschalter mehr Zeit zur Verfügung steht.The invention enables switching on by moving the tipping point beyond the theoretical tipping point backwards, i.e. the contacts are switched on safely later. In this way, the security is increased that in particular leading auxiliary switches are switched on, which must be switched before the tipping point is reached, since more time is also available for switching on the auxiliary switches.
Mit der Erfindung gewinnt man also Zeit durch die Verlegung des Kippunktes nach hinten, die sich sowohl positiv auf das sichere Schalten von Hilfsschaltern als auch Unterspannungslösern auswirkt .The invention therefore saves time by moving the tipping point backwards, which has a positive effect on the safe switching of auxiliary switches as well as undervoltage releases.
In der Aus-Stellung hat der für bestimmte Anwendungsfälle mit einem voreilenden Hilfsschalter gekoppelteIn the off position, it is coupled to a leading auxiliary switch for certain applications
Unterspannungsauslöser keine Spannung, beim Wiedereinschalten wird zuerst der Hilfsschalter eingeschaltet, der Unterspannungsauslöser erhält Spannung und es wird dann die mechanische Sperre aufgehoben, so daß der Unterspannungsauslöser schalten kann. Da derUndervoltage release no voltage, when switching on again the auxiliary switch is switched on, the undervoltage release receives voltage and the mechanical lock is then released so that the undervoltage release can switch. Since the
Unterspannungsauslöser mit Anker und Magnetfeld arbeitet, muß genügend Zeit vorhanden sein, wenn die Spannung am Unterspannungsauslöser anliegt, ein Magnetfeld aufzubauen, bis die Kontakte mittels der Schaltwelle des Schaltschlosses geschlossen sind, um den Schalter zu entriegeln. Durch die Verlegung des Kippunktes des Schaltschlosses nach hinten, wird so viel Zeit gewonnen, und zwar mit Sicherheit, daß ein Unterspannungsauslöser ein Magnetfeld aufbauen kann und mit Sicherheit entriegeln kann.Undervoltage release with armature and magnetic field works, there must be enough time, when the voltage at the undervoltage release is present, to build up a magnetic field until the contacts are closed by means of the switching shaft of the key switch to unlock the switch. By moving the tilt point of the key switch to the rear gained so much time, with certainty that an undervoltage release can build up a magnetic field and can unlock it with certainty.
Vorteilhafte Ausgestaltungen der Erfindung sind den kennzeichnenden Merkmalen der Unteransprüche entnehmbar.Advantageous embodiments of the invention can be found in the characterizing features of the subclaims.
Insbesondere ist vorgesehen, daß der Freigabehebel drehbar um die ortsfeste Achse, um die der Stützhebel schwenkbar gelagert ist, in dem Schaltschloß angeordnet ist. Schaltkulisse,In particular, it is provided that the release lever is rotatably arranged in the switching lock about the stationary axis about which the support lever is pivotally mounted. Shifting gate,
Stützhebel, Freigabehebel weisen etwa U-förmige Gestalt auf und sind damit auf einfache Weise ineinander anzuordnen und gegeneinander zu bewegen. Auch der Kniehebel bildet im wesentlichen durch die beiden Hebel miteinander verbindende Achse eine U-Form, die in dem von der Schaltkulisse umfaßten Raum einsetzbar ist und bewegbar ist.Support lever, release lever have approximately U-shaped shape and are thus easy to arrange and move against each other. The toggle lever also essentially forms a U-shape through the axis connecting the two levers, which can be inserted and moved in the space enclosed by the shifting gate.
Die Verklinkungsflache zwischen Freigabehebel und Schaltwelle, die das vorzeitige Bewegen der Schaltwelle und Schließen der Kontakte beim Einschalten verhindern soll, ist bevorzugt an einem an der Schaltwelle angeformten Nocken mittels einer in radialer Richtung vorstehenden mindestens einer Anschlagnase ausgebildet, die mit dem mindestens einen Verklinkungsanschlag des Freigabehebels zusammenwirkt.The latching surface between the release lever and the selector shaft, which is intended to prevent premature movement of the selector shaft and closing of the contacts when switching on, is preferably formed on a cam formed on the selector shaft by means of a radially protruding at least one stop lug, which is connected to the at least one latching stop of the release lever cooperates.
Für die Freigabe des Kippunktes bei Bewegung der Schaltkulisse ist insbesondere vorgesehen, daß der als Bedienteil eines Kipphebelhalters dienende Kipphebel, der mit der Schaltkulisse fest verbunden ist, ein Anschlagsteg ausgebildet ist, der bei Erreichen der gewünschten Freigabeposition für die Bewegung der Schaltwelle zum Schließen der Kontakte an dem Freigabehebel anschlägt und diesen mitnimmt, wodurch die Verklinkung zwischen Freigabehebel und Schaltwelle gelöst wird und die Schaltwelle die Kontakte mit Sicherheit schließen kann.For the release of the tipping point when the shift gate is moving, it is provided in particular that the rocker arm serving as the operating part of a rocker arm holder, which is firmly connected to the shift gate, is formed with a stop bar which, when the desired release position for the movement of the shift shaft for closing the contacts is reached strikes the release lever and takes it with it, whereby the latching between the release lever and the selector shaft is released and the selector shaft can close the contacts with certainty.
Die Erfindung wird nachfolgend an einem Ausführungsbeispiel in der Zeichnung näher erläutert . Es zeigen Fig. 1 perspektivische Ansicht des Schaltschlosses mit abgehobenem KipphebelhalterThe invention is explained in more detail using an exemplary embodiment in the drawing. Show it Fig. 1 perspective view of the key switch with lifted rocker arm holder
Fig. 2 schematisierte Seitenansicht des Schaltschlosses nach Fig. 1 im eingeschalteten ZustandFig. 2 shows a schematic side view of the switch lock of Fig. 1 in the switched-on state
Fig. 3 schematisierte Seitenansicht des Schaltschlosses nach Fig. 1 im ausgeschalteten Zustand ohne KlinkenhebeleinrichtungFig. 3 shows a schematic side view of the switch lock according to Fig. 1 in the switched-off state without ratchet lever device
Fig. 4 rechte Seitenansicht B von Fig. 34 right side view B of FIG. 3rd
Fig. 5 rechte Seitenansicht A von Fig. 25 right side view A of FIG. 2nd
Fig. 6a-d schematische Darstellung der Funktion des Schaltschlosses in den verschiedenen SchaltStellungen von Aus, theoretischer Kippunkt, reeller Kippunkt und EinFig. 6a-d schematic representation of the function of the key switch in the different switching positions of off, theoretical tipping point, real tipping point and on
Fig. 7a-c Darstellung des Freigabehebels in drei Ansichten.Fig. 7a-c representation of the release lever in three views.
In der Fig. 1 ist das Schaltschloß 1 dargestellt, wie es als Teil eines Leistungsschalters in ein nicht dargestelltes Formgehäuse eingesetzt ist. Das Schaltschloß ist ohne die die beweglichen Kontakte tragende Schaltwelle dargestellt. Das Schaltschloß 1 besteht aus den beiden seitlichen Schloßplatten 21, mit denen es in dem nicht dargestellten Formgehäuse fixiert wird. Des weiteren umfaßt das Schaltschloß 1 die Schaltkulisse 11, die U-förmig ausgebildet und mit den beiden U-Schenkeln in einer Lagerstelle 27 der Schloßplatte 21 schwenkbar gelagert ist, sowie zwei Kniehebel 19, die mittels der Kniehebelachse 13 fest miteinander verbunden sind, die schraubenförmige Schloßfeder 12 sowie die Verklinkungseinrichtung mit Klinkenhebel 23, Klinkenfeder 24 und Klinke 25 sowie den Freigabehebel 16 mit Vorspannfeder 17, siehe Fig. 2 und 3, für die Freigabe der nicht dargestellten Schaltwelle . Wie aus den Fig. 1 bis 5 ersichtlich, ist die Schaltkulisse 11 im wesentlichen U-fόrmig gestaltet mit den beiden seitlichen Schenkeln 11c und 11b, die in der Ausnehmung 27 der Schloßplatten 1 schwenkbar in Pfeilrichtung Pl gelagert sind. An dem die beiden Schenkel 11c, 11b verbindenden Steg der Schaltkulisse 11 ist vorstehend der Kipphebel 11a angeformt.In Fig. 1, the switch lock 1 is shown as it is used as part of a circuit breaker in a mold housing, not shown. The switch lock is shown without the switching shaft carrying the movable contacts. The switch lock 1 consists of the two side lock plates 21 with which it is fixed in the mold housing, not shown. Furthermore, the switch lock 1 includes the switching link 11, which is U-shaped and is pivotally mounted with the two U-legs in a bearing 27 of the lock plate 21, and two toggle levers 19, which are firmly connected to one another by means of the toggle lever axis 13, which are helical Lock spring 12 and the latching device with pawl lever 23, pawl spring 24 and pawl 25 and the release lever 16 with biasing spring 17, see FIGS. 2 and 3, for the release of the control shaft, not shown. As can be seen from FIGS. 1 to 5, the switching link 11 is essentially U-shaped with the two lateral legs 11c and 11b, which are pivotally mounted in the recess 27 of the lock plates 1 in the direction of arrow P1. The rocker arm 11a is formed above on the web of the shift link 11 connecting the two legs 11c, 11b.
Der U-förmige Stützhebel 22 ist innerhalb der Schaltkulisse 11 angeordnet und stützt sich mit zwei seitlichen Schenkeln schwenkbar entgegen der Kraft der Schloßfeder 12 an zwei innenseitig an den Schloßplatten 21 angebrachten Lagernieten 29 ab, die eine ortsfeste Achse 29 zum Schwenken der Stützhebel 22 bilden. Der Stützhebel 22 wird von der Schaltkulisse von der ausgelösten in die ausgeschalteteThe U-shaped support lever 22 is arranged within the shifting link 11 and is pivotably supported with two lateral legs against the force of the lock spring 12 on two bearing rivets 29 attached to the inside of the lock plates 21, which form a stationary axis 29 for pivoting the support lever 22. The support lever 22 is switched from the triggered to the switched off
Stellung bewegt. Die beiden gleichen Kniehebel 19 sind mit ihrem einen Ende mit der Kniehebelachse 13 fest verbunden und im Abstand gehalten. Die Schloßfeder greift in der Mitte der Kniehebelachse 13, siehe Lagerstelle 12b, und mit ihrem anderen Ende, siehe Lagerstelle 12a, im oberen Bereich derPosition moved. The two same toggle levers 19 are firmly connected at one end to the toggle lever axis 13 and are kept at a distance. The lock spring engages in the middle of the toggle lever axis 13, see bearing point 12b, and with its other end, see bearing point 12a, in the upper region of the
Schaltkulisse 11 an. Gegen die Kraftwirkung der Schloßfeder 12 stützen sich die Kniehebel 19 in dem Stützhebel 22 im Bereich der durch eine Ausnehmung gebildeten Lagerstelle 18 ab. Auf diese Weise bilden die Schaltkulisse 11, der Stützhebel 22, die Kniehebel 19 und die Schloßfeder 12 ein einfaches wirksames Kippsprungwerk. Im überstreckten Zustand des Kippsprungwerkes, d.h. bei der größten Ausdehnung der Schloßfeder 12 in einer Zwischenlage zwischen dem ausgeschalteten und dem eingeschalteten Zustand des Schaltschlosses 1 - theoretischer Kippunkt - befinden sich die Berührungspunkte der Kniehebel der Lagerstellen 18 des Stützhebels in einer Ebene mit den Angriffspunkten der Schloßfeder 12 an der Schaltkulisse 11 bzw. der Kniehebelachse 13. Die durch die Kniehebelachse 13 beabstandet gehaltenen Kniehebel 19 werden seitlich von je einer an den seitlichen Schenkeln des Stützhebels 22 angeformten Führungsnocken 33 geführt . Die Klinke 25 ist seitlich in den Schloßplatten 21 schwenkbar gelagert. Der Klinkenhebel 23 ist ebenfalls mit seitlichen Vorsprüngen in Ausnehmungen 26 in den Schloßplatten 21 schwenkbar gelagert . Die schraubenförmige Klinkenfeder 24 ist zwischen Klinke 25 und Klinkenhebel 23 eingehängt unter leichter Zugspannung.Shift gate 11 on. Against the force of the lock spring 12, the toggle levers 19 are supported in the support lever 22 in the region of the bearing point 18 formed by a recess. In this way, the shifting gate 11, the support lever 22, the toggle lever 19 and the lock spring 12 form a simple effective toggle mechanism. In the overstretched state of the toggle mechanism, that is, with the greatest expansion of the lock spring 12 in an intermediate position between the switched-off and the switched-on state of the switching mechanism 1 - theoretical tilting point - the points of contact of the toggle levers of the bearing points 18 of the support lever are in one plane with the points of application of the lock spring 12 on the shifting link 11 or the toggle lever axis 13. The toggle levers 19, which are spaced apart by the toggle lever axis 13, are guided laterally by a guide cam 33 formed on the lateral legs of the support lever 22. The pawl 25 is pivotally mounted laterally in the lock plates 21. The pawl lever 23 is also pivotally mounted with lateral projections in recesses 26 in the lock plates 21. The helical pawl spring 24 is suspended between pawl 25 and pawl lever 23 under slight tension.
Der Stützhebel 22 weist mittig einen aus dem U-förmigen Bereich vorkragenden Arm 22a auf, an dem eine Verriegelungsfläche 221 ausgebildet ist, die im ausgeschalteten und im eingeschalteten Zustand des Schaltschlosses 1 in Wirkverbindung mit derThe support lever 22 has in the middle an arm 22a projecting from the U-shaped area, on which a locking surface 221 is formed, which in the switched-off and in the switched-on state of the switch lock 1 is in operative connection with the
Verklinkungseinrichtung steht. Die Verklinkungseinrichtung ist beispielhaft in der DE 42 27 213 AI beschrieben.Latching device stands. The latching device is described by way of example in DE 42 27 213 AI.
Die nicht näher dargestellte Schaltwelle, die die Kontaktarme mit den beweglichen Kontaktstücken trägt, ist am Gehäuse des Leistungsschalters drehbar gelagert und durch die Lagerstellen 28 der Schloßplatten 21 geführt.The switching shaft, not shown, which carries the contact arms with the movable contact pieces, is rotatably mounted on the housing of the circuit breaker and is guided through the bearing points 28 of the lock plates 21.
Der Freigabehebel 16 mit einer wie in den Fig. 7a-c dargestellten Gestalt ist ebenfalls an den die ortsfeste Achse 29 bildenden Lagernieten, die an den Schloßplatten 21 innenseitig angebracht sind, drehbar gelagert. Der Freigabehebel 16 steht des weiteren unter leichter Vorspannung der Vorspannfeder 17, die beispielsweise am Gehäuse das zweite Widerlager aufweist. Auf der der Vorspannfeder 17 abgewandten Seite, d.h. der Schaltwelle zugewandten Seite, weist der Freigabehebel 16 die Verklinkungsanschläge 161 auf.The release lever 16 with a shape as shown in FIGS. 7a-c is also rotatably mounted on the bearing rivets forming the fixed axis 29, which are attached to the inside of the lock plates 21. The release lever 16 is also under slight bias of the bias spring 17, which has, for example, the second abutment on the housing. On the side facing away from the biasing spring 17, i.e. the side facing the selector shaft, the release lever 16 has the latching stops 161.
Das Bedienteil der Schaltkulisse, nämlich der Kipphebel 11a ist mit einem Kipphebelhalter 10 fest verbunden. Der Kipphebelhalter 10 weist an seiner Unterseite einen Anschlagsteg 10a auf, mit dem er in einer bestimmten Stellung der Schwenkbewegung Pl der Schaltkulisse 11 in Wirkverbindung mit dem Freigabehebel, d.h. mit dem Anschlagvorsprung 162 tritt. Die Achse X der Schloßfeder 12, bestimmt durch deren Lagerpunkte 12a, 12b an der Schaltkulisse bzw. der Kniehebelachse 13 verändert ihre Lage je nach Stellung des Kipphebels 11a, d.h. der Stellung der Schaltkulisse.The control part of the shifting gate, namely the rocker arm 11a is firmly connected to a rocker arm holder 10. The rocker arm holder 10 has on its underside a stop bar 10a with which it comes into operative connection with the release lever, ie with the stop projection 162, in a certain position of the pivoting movement P1 of the shifting link 11. The axis X of the lock spring 12, determined by its bearing points 12a, 12b on the shift link or the toggle lever axis 13, changes its position depending on the position of the rocker arm 11a, ie the position of the shift link.
Die Kniehebelachse 13 ist in einem Lager 30 geführt, das an der nicht dargestellten Schaltwelle ausgebildet ist. Hierbei handelt es sich um eine Lagerbahn, d.h. die Kniehebelachse 30 ist ortsveränderlich gelagert und sie wandert mit der Bewegung der Schaltkulisse in der Kurvenbahn, wie auch aus einem Vergleich der Fig. 2 und 3 ersichtlich.The toggle lever axis 13 is guided in a bearing 30 which is formed on the selector shaft, not shown. This is a storage track, i.e. the toggle lever axis 30 is mounted in a variable position and it moves with the movement of the shifting gate in the cam track, as can also be seen from a comparison of FIGS. 2 and 3.
In den Fig. 7a-c ist der Freigabehebel, wie er in dem in den Fig. 1 bis 5 dargestellten Schloß eingesetzt ist, dargestellt. Auch der Freigabehebel 16 weist eine im wesentlichen U-förmige Gestalt mit seitlichen Schenkeln 164 auf, die über einen Verbindungssteg 162 der zugleich den Anschlagsteg für das Herstellen der Wirkverbindung mit dem Anschlagsteg des Bedienteils, d.h. Kipphebelhalters bildet.7a-c, the release lever, as used in the lock shown in FIGS. 1 to 5, is shown. The release lever 16 also has an essentially U-shaped shape with lateral legs 164 which, via a connecting web 162, which at the same time is the stop web for establishing the operative connection with the stop web of the operating part, i.e. Rocker arm holder forms.
In den seitlichen Schenkeln 164 des Freigabehebels 16 sind Bohrungen 160 zum Aufsetzen auf die Lagerniete 29, d.h. die ortsfeste Achse 29, ausgebildet. An den Längsseiten der Schenkel 164, die in Richtung auf die Schaltwelle beim Einsetzen in das Schaltschloß bzw. in Richtung auf dieIn the side legs 164 of the release lever 16 there are bores 160 for placement on the bearing rivets 29, i.e. the fixed axis 29, formed. On the long sides of the legs 164, which in the direction of the control shaft when inserted into the switch lock or in the direction of the
Verklinkungseinrichtung zeigen, sind Verklinkungsflachen 161 ausgebildet, die an entsprechenden Verriegelungsflächen bzw. Anschlagnasen, die an der Schaltwelle ausgebildet sind, anschlagen und ein Sperren der Bewegung der Schaltwelle bewirken.Show latching device, latching surfaces 161 are formed which abut corresponding locking surfaces or stop lugs which are formed on the selector shaft and block the movement of the selector shaft.
In den Fig. 6a-6d ist der Funktionsablauf des Schaltschlosses mit Freigabehebel und Kontaktsystem schematisch dargestellt, wobei die die Verklinkungseinrichtung einschließlich Stützhebel betreffenden Teile fortgelassen worden sind bei der Betrachtung. Fig. 6a zeigt die Aus-Stellung des Schaltschlosses. Der Kontaktapparat mit der Schaltwelle 20, den Kontaktarmen 71, die die beweglichen Kontaktstücke 70 tragen sowie die feststehenden stationären Kontaktstücke 80 sind dargestellt. An der Schaltwelle 20 sind zwei vorstehende Nocken 15 ausgebildet, die jeweils mit einem Nockenschlitz 14 ausgebildet sind, der die Kurvenbahn für die darin geführte Kniehebelachse 13 bildet. Am Umfang der Nocken ist einseitig an einer Stelle die vorstehende Anschlagnase 151 ausgebildet, die mit den Verklinkungsanschlägen 161 des Freigabehebels 16 in Wirkverbindung tritt. In der gezeigten Aus-Stellung gemäß Fig. 6a befindet sich der Freigabehebel 16 unter der Vorspannung der Vorspannfeder 17 nicht in Wirkkontakt mit der Schaltwelle 20. Das Bedienteil, der Kipphebel 11a wird nunmehr zum Einschalten der Kontakte in Pfeilrichtung P2 bewegt. Fig. 6b zeigt die Position bei erreichtem theoretischem Kippunkt der Schloßfeder 12. In dieser Position tritt der Freigabehebel 16 mit der Schaltwelle 20 in Wirkverbindung, indem der Verklinkungsanschlag 161 an der Anschlagnase 151 der Schaltwelle anschlägt und damit eine Bewegung der Schaltwelle in Pfeilrichtung P3 sperrt.6a-6d, the functional sequence of the key switch with release lever and contact system is shown schematically, wherein the parts relating to the latching device including the support lever have been omitted when considering. 6a shows the off position of the key switch. The contact apparatus with the switching shaft 20, the contact arms 71, which support the movable contact pieces 70 and the stationary contact pieces 80 are shown. Two protruding cams 15 are formed on the control shaft 20, each of which is formed with a cam slot 14 which forms the cam track for the toggle lever axis 13 guided therein. On one side of the circumference of the cams, the projecting stop lug 151 is formed, which comes into operative connection with the latching stops 161 of the release lever 16. In the shown off position according to FIG. 6a, the release lever 16 is not in operative contact with the selector shaft 20 under the pretension of the pretension spring 17. The operating part, the rocker arm 11a is now moved in the direction of arrow P2 to switch on the contacts. Fig. 6b shows the position when the theoretical tilt point of the lock spring 12 is reached. In this position, the release lever 16 comes into operative connection with the control shaft 20 by the latching stop 161 striking the stop lug 151 of the control shaft and thus blocking movement of the control shaft in the direction of arrow P3.
Fig. 6c zeigt nun, daß bei Weiterbewegung der Schaltkulisse 11 durch das Bedienteil 11a, 10 in Pfeilrichtung P2 der theoretische Kippunkt gemäß Fig. 6b überschritten wird und nach einer entsprechend der Dimensionierung des Freigabehebels 16 und der Anschlagnase 151 vorgegebenen Weg der Freigabehebel 16 sich aus der Verrastung mit der Anschlagnase 151 der Schaltwelle 20 löst und in Pfeilrichtung P auswandert. Das Auswandern des Freigabehebels 16 in Pfeilrichtung P wird dadurch bewirkt, daß der Anschlagsteg 10a an der Unterseite des Kipphebelhalters 10 des Bedienteiles bei Bewegung der Schaltkulisse 11 in Pfeilrichtung P2 auf den Anschlagsteg 162 des Freigabehebels 16 trifft und diesen mitnimmt, wodurch die Freigabe der Anschlagnase 151 am anderen Ende desFig. 6c shows that when the shift gate 11 is moved further by the operating part 11a, 10 in the direction of arrow P2, the theoretical tipping point according to Fig. 6b is exceeded and after a path corresponding to the dimensioning of the release lever 16 and the stop lug 151, the release lever 16 is out the latching with the stop lug 151 of the selector shaft 20 releases and migrates in the direction of arrow P. The migration of the release lever 16 in the direction of arrow P is effected in that the stop bar 10a on the underside of the rocker arm holder 10 of the operating part, when the shifting gate 11 moves in the arrow direction P2, hits the stop bar 162 of the release lever 16 and takes it along, thereby releasing the stop nose 151 at the other end of the
Freigabehebels 16 im Bereich des Steges 161 erfolgt. Nach der Freigabe der Schaltwelle 20, d.h. nach Lösen der Wirkverbindung zwischen dem Freigabehebel 16 und der Anschlagnase 151 kann die Schaltwelle 20 sich in Pfeilrichtung P3, siehe Fig. 6, schlagartig unter der Wirkung der Schloßfeder 12 bewegen und die Kontakte 70, 80 schließen, und zwar mit erhöhtem Kontaktdruck.Release lever 16 takes place in the area of the web 161. After the release of the control shaft 20, ie after releasing the operative connection between the release lever 16 and the Stop lug 151, the switching shaft 20 can move suddenly in the direction of arrow P3, see FIG. 6, under the action of the lock spring 12 and close the contacts 70, 80, with increased contact pressure.
Ein Vergleich der Fig. 6b und 6c zeigt, daß eine Differenz zwischen theoretischem Kippunkt und gesteuertem Kippunkt (Lage bezüglich der Achsen X der Schloßfeder 12) vorhanden ist und die Differenz der Wegstrecke zwischen diesen beiden Kippunktlagen die Verlegung des Kippunktes nach hinten umfaßt, wodurch die Sicherheit des Schaltens des Schlosses erhöht wird. Gleichzeitig wird durch die Verlegung des Kippunktes nach hinten durch die Verriegelung mittels des Freigabehebels 16 zum Zeitpunkt des theoretischen Kippunktes erreicht, daß stets ausreichend hohe Kräfte auf die Kontakte einwirken, um diese mit Sicherheit zu schließen, so daß eine sichere Einschaltposition gemäß Fig. 6d erreicht wird. A comparison of FIGS. 6b and 6c shows that there is a difference between the theoretical tipping point and the controlled tipping point (position with respect to the axes X of the lock spring 12) and the difference in the distance between these two tipping point positions includes the shifting of the tipping point to the rear, as a result of which Security of switching the lock is increased. At the same time, by moving the tipping point to the rear through the locking by means of the release lever 16 at the time of the theoretical tipping point, sufficiently high forces always act on the contacts to close them with certainty, so that a safe switch-on position according to FIG. 6d is reached becomes.

Claims

Patentansprüche claims
1. Schaltschloß für ein Niederspannungs-Schaltgerät, insbesondere einen Leistungsschalter oder einen Lasttrennschalter, mit Gehäuse mit einer mittels eines Bedienteiles zwecks Ein- und Ausschalten bewegbaren schwenkbar im Gehäuse gelagerten Schaltkulisse, mit zwei über einer Achse miteinander verbundenen Kniehebeln, die schwenkbar entgegen der Kraftwirkung einer Schloßfeder gelagert sind, wobei das verschwenkbare, die1.Switch lock for a low-voltage switching device, in particular a circuit breaker or a load break switch, with housing with a switching link pivotably mounted in the housing by means of an operating part for switching on and off, with two toggle levers connected to one another via an axis, which can be pivoted counter to the force of one Lock spring are mounted, the pivotable, the
Kniehebelachse umfassende Ende der Kniehebel an einer im Gehäuse drehbar gelagerten Schaltwelle, die mit bewegbaren Kontaktstücken ausgestattet ist, angelängt ist, und wobei die Schloßfeder zwischen Schaltkulisse und Kniehebelachse angeordnet ist, dadurch gekennzeichnet, daß ein um eine ortsfeste Achse (29) drehbarer unter der Krafteinwirkung einer Vorspannfeder (17) stehender Freigabehebel (16) vorgesehen ist, der mittels mindestens eines Verklinkungsanschlages (161) in die Bewegungsbahn der Schaltwelle (20) eingreift und die Freigabe derEnd of the toggle lever axis comprising the toggle lever is attached to a shift shaft which is rotatably mounted in the housing and is equipped with movable contact pieces, and the lock spring is arranged between the shifting link and the toggle lever axis, characterized in that a rotatable about a fixed axis (29) under the action of force a pre-tensioning spring (17) is provided with a release lever (16) which engages in the movement path of the selector shaft (20) by means of at least one latching stop (161) and the release of the
Bewegungsbahn durch Ansteuern des Freigabehebels (16) mittels des Bedienteils (11a) erfolgt, dergestalt, daß beim Einschaltvorgang mittels des Bedienteils (11a) die Bewegung der Schaltwelle (20) zum Schließen der Kontakte (70,80) erst nach Überschreiten des theoretischen Kippunktes der Schloßfeder (12) freigegeben wird.Movement path by controlling the release lever (16) by means of the control part (11a), such that when the switch-on process by means of the control part (11a), the movement of the control shaft (20) to close the contacts (70, 80) only after the theoretical tipping point has been exceeded Lock spring (12) is released.
2. Schaltschloß nach Anspruch 1, dadurch gekennzeichnet, daß der Freigabehebel (16) drehbar um die ortsfeste Achse (29) , um die ein durch die2. Switch lock according to claim 1, characterized in that the release lever (16) rotatable about the fixed axis (29) around which one through the
Schaltkulisse (11) mitnehmbarer und mit seinem freien Ende (221) mit einer Verklinkungseinrichtung (22, 23, 24) zusammenwirkender Stützhebel (22) schwenkbar gelagert ist, angeordnet ist.Switching gate (11) removable and with its free end (221) with a latching device (22, 23, 24) cooperating support lever (22) is pivotally mounted, is arranged.
3. Schaltschloß nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß an mindestens einem an der Schaltwelle (20) angeformten Nocken (15) in radialer Richtung vorstehend eine Anschlagnase (151) ausgebildet ist, die mit dem Verklinkungsanschlag (161) des Freigabehebels (16) zusammenwirkt.3. Switch lock according to one of claims 1 or 2, characterized in that on at least one on the switching shaft (20) molded cam (15) in the radial direction above a stop lug (151) is formed, which with the latching stop (161) of the release lever (16) interacts.
4. Schaltschloß nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Kipphebel (11a) der Schaltkulisse (11) mit einem Kipphebelhalter (10) fest verbunden ist, der an seiner Unterseite einen vorstehenden Anschlagsteg (10a) aufweist, der bei Erreichen der gewünschten Freigabeposition der Bewegungsbahn der Schaltwelle (20) zum Schließen der Kontakte (70, 80) an dem Freigabehebel (16) anschlägt und diesen mitnimmt, wodurch die Verklinkung zwischen Freigabehebel (16) und Schaltwelle (20) gelöst wird. 4. Switch lock according to one of claims 1 to 3, characterized in that the rocker arm (11a) of the shift gate (11) with a rocker arm holder (10) is fixedly connected, which has a projecting stop web (10a) on its underside, which when reached the desired release position of the movement path of the selector shaft (20) for closing the contacts (70, 80) strikes the release lever (16) and takes it with it, whereby the latching between the release lever (16) and the selector shaft (20) is released.
EP95939272A 1994-11-29 1995-11-14 Lock mechanisme for a low voltage switch Expired - Lifetime EP0795187B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4442417 1994-11-29
DE4442417A DE4442417C1 (en) 1994-11-29 1994-11-29 Toggle action mechanism for use with LV electrical power switch
PCT/EP1995/004461 WO1996017368A1 (en) 1994-11-29 1995-11-14 Lock for a low-voltage switch

Publications (2)

Publication Number Publication Date
EP0795187A1 true EP0795187A1 (en) 1997-09-17
EP0795187B1 EP0795187B1 (en) 1998-07-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95939272A Expired - Lifetime EP0795187B1 (en) 1994-11-29 1995-11-14 Lock mechanisme for a low voltage switch

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EP (1) EP0795187B1 (en)
JP (1) JPH10508150A (en)
CN (1) CN1047685C (en)
AT (1) ATE168222T1 (en)
DE (2) DE4442417C1 (en)
ES (1) ES2121434T3 (en)
HK (1) HK1004841A1 (en)
WO (1) WO1996017368A1 (en)

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ITMI20011066A1 (en) * 2001-05-22 2002-11-22 Gewiss Spa BOXED MAGNETOTHERMAL ELECTRIC SWITCH
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ITMI20090010A1 (en) 2009-01-08 2010-07-09 Abb Spa INTERRUPTION DEVICE FOR LOW VOLTAGE SYSTEMS
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CN104916479B (en) * 2015-06-30 2017-05-31 重庆长安汽车股份有限公司 A kind of safety switch used for electric vehicle
CN106935451B (en) * 2015-12-30 2019-04-30 三信国际电器上海有限公司 A kind of closing device and the residual current action breaker with the device
DE102016217106A1 (en) * 2016-09-08 2018-03-08 Siemens Aktiengesellschaft Switch lock for an electrical switch and electrical switch with such a switch lock
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Also Published As

Publication number Publication date
CN1047685C (en) 1999-12-22
EP0795187B1 (en) 1998-07-08
HK1004841A1 (en) 1998-12-11
DE4442417C1 (en) 1996-02-15
CN1166889A (en) 1997-12-03
DE59502785D1 (en) 1998-08-13
ES2121434T3 (en) 1998-11-16
JPH10508150A (en) 1998-08-04
ATE168222T1 (en) 1998-07-15
WO1996017368A1 (en) 1996-06-06

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