EP0188482B1 - Switch latch - Google Patents

Switch latch Download PDF

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Publication number
EP0188482B1
EP0188482B1 EP85903288A EP85903288A EP0188482B1 EP 0188482 B1 EP0188482 B1 EP 0188482B1 EP 85903288 A EP85903288 A EP 85903288A EP 85903288 A EP85903288 A EP 85903288A EP 0188482 B1 EP0188482 B1 EP 0188482B1
Authority
EP
European Patent Office
Prior art keywords
lever
switch latch
latch according
pin
switching device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85903288A
Other languages
German (de)
French (fr)
Other versions
EP0188482A1 (en
Inventor
Herbert Hauschildt
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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
Priority claimed from DE19843425996 external-priority patent/DE3425996A1/en
Priority claimed from DE19843439243 external-priority patent/DE3439243A1/en
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of EP0188482A1 publication Critical patent/EP0188482A1/en
Application granted granted Critical
Publication of EP0188482B1 publication Critical patent/EP0188482B1/en
Expired legal-status Critical Current

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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
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • 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
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • 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
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • H01H2071/502—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker with direct contact between manual operator and welded contact structure

Definitions

  • the invention relates to a switch lock according to the preamble of claim 1.
  • a switch lock is such.
  • the known type shows a motor protection switch, the lock mechanism is accommodated in a U-shaped support part made of sheet metal, the base plate being fastened to a support plate.
  • the key switch is attached to the carrier plate by means of screws from the rear of the carrier plate.
  • the carrier plate with the key switch is in turn screwed onto the housing base.
  • the walls and the base plate of this U-shaped support part of the lock mechanism are designed as flat parts.
  • the bearing bolts and the connecting bolts of this known switch lock are designed as simple bolts and the spring elements as simple tension springs.
  • US-A-3 194 922 shows a low-voltage switching device for lighting systems or similar systems with low electrical power, in which the lock mechanism is accommodated between insulating flat side walls.
  • the switch lock is fastened to the bottom of the switch housing with clips that engage in corresponding openings in the side walls.
  • the clips are tightened using screws that are inserted through the bottom of the case.
  • a carrier part for a single-pole miniature auto switch in which the switching mechanism is accommodated between two bearing plates.
  • the bearing plates are provided with feet that engage in slots in the base. By moving the feet in the slots or by means of a clamp acting on the feet, the bearing plates can be attached to the base without screws using the switching mechanism.
  • An insertable cross member ensures that the bearing plates cannot be moved against each other.
  • the invention has for its object to make a switch lock of the type mentioned easier to assemble and thus simplify the manufacture of switching devices.
  • the configuration of the switch lock according to the invention results in the possibility of automatic assembly, in that the switch lock manufactured as a ready-to-assemble unit can be easily installed in a switchgear housing.
  • This installation can e.g. B. done automatically by the fact that the switch lock with the right-angled mounting webs is used in prepared, adapted housing recesses and over a mounting bridge by fasteners, for. B. screws, is attached to housing-fixed parts.
  • the switch lock is thus fastened via three fastening points in the housing, namely once over the two web ends, which are inserted into adapted housing openings. and on the other hand via the fastening means on the assembly bridge. These three attachment points lie approximately in the same attachment level.
  • the two bearing plates which are arranged in the manner of protruding flags and which accommodate all the switching parts between them, extend at right angles to this fastening plane. Since the fasteners of the switch lock are arranged at a single end, the flag-like protruding bearing plates can be fully used for receiving the switch lock parts without the need for fasteners for the switch lock.
  • a switch lock installed in this way in an electrical switching device is integrated in a pole track.
  • the present invention is preferably applied to electrical circuit breakers.
  • the switch lock is advantageously suitable for automatic assembly, since the switch lock introduced into the housing openings for the mounting webs only needs to be fixed at one point, specifically in the area of the mounting bridge, by means of a screw or the like.
  • the bearing plates form fixed pivot bearings for a drive lever and a ratchet lever, the drive lever being connected via at least one tension spring to the hinge pin of a toggle lever, one lever arm of which is articulated on the ratchet lever and the other lever arm for actuating a movable contact piece of the switching device is trained.
  • the drive lever, ratchet lever and toggle lever are thus located on different, mutually parallel planes of movement within the two bearing plates, which run parallel to the planes of movement.
  • the bearing plates are connected to the assembly bridge by plugging them together.
  • the mounting bridge has openings for the locking engagement of lugs of the bearing plates and is provided with holes for receiving screws for the purpose of fastening in a switchgear housing.
  • the basic structure of the frame for the switch lock is thus achieved by simply plugging the two bearing plates together with the transverse mounting bridge.
  • This connection can be detachable or, for. B. by riveting. be firm.
  • FIGS. 1 to 4. each show sectional side views of a switching device with a switch lock according to the invention, wherein different switching positions are provided in each case.
  • 5 shows a top view of the switching device according to FIGS. 1 to 4.
  • FIG. 6 shows a detail. 7a, b, c show three views of the key switch.
  • FIGS. 1 to 4 show a circuit breaker 10 with a plastic housing 11.
  • the circuit breaker has three pole tracks, of which only one can be seen in FIGS. 1 to 4.
  • the housing 11 has three terminals 12, 13 for the supply and discharge lines on the end faces.
  • the connection terminals 12 are connected to a fixed contact piece 14 and the connection terminals 13 are connected to a movable contact piece 17 via a trigger unit 15 and a flexible line 16. 18 with a stack of several individual quenching plates 19 is designated.
  • a switching lock is used to actuate the movable contact piece 17.
  • the switching mechanism 20 has two bearing plates 21, 22 made of flat stamped parts and running parallel to one another, of which only the rear 21 can be seen in FIGS. 1 to 4.
  • Both bearing plates 21, 22 each have a mounting web 23, 24 which is bevelled at the end and are detachably connected to one another by a mounting bridge 25 (FIG. 7).
  • the bearing plates 21, 22 each have a recess 26 with bulges 26a, b, c described below.
  • a drive lever is mounted via a bearing pin 27, which is designed as a double lever and consists of two flat stamped parts 28, 29 arranged at a distance from one another.
  • the stamped parts 28, 29 form a two-armed rotary lever with a long lever arm 28a, 29a and a short lever arm 28b, 29b.
  • a handle 30 is provided at the end of the long lever arm 28a, 29a.
  • the parts 28, 29 are connected by the bolts 27 and 47, 48 (see below).
  • the ratchet lever 32 is designed as a one-armed angle lever.
  • the lock 20 finally has a toggle lever 33 with a lever arm 34 and a lever arm 35, which are connected to one another by a hinge pin 36.
  • the lever arms 34, 35 are each designed as double lever arms 34a, b and 35a, b.
  • the one double-arm lever arm 34a, b is articulated in the angular range of the angle lever 32 via a hinge pin 32a.
  • the double-armed lever arm 35a. b is articulated on a switching shaft 37, which in turn carries the movable contact pieces 17.
  • Two tension springs 38 are seated between the hinge pin 36 and the upper drive lever.
  • Fig. 1 shows the switch in the on state, i. H. with closed contacts 14, 17.
  • the switching lock 20 is latched, d. H. the pawl lever 32 is located with a nose 32b on a half shaft 39 which, in the event of an overcurrent, e.g. B. can be rotated by bimetallic 40.
  • the bearing pin 36 of the toggle lever lies in a bulge 26a of the recess 26.
  • FIG. 2 shows a position in which the switch 10 was switched off manually, the trigger 15 not responding, i. H. the latching between the ratchet lever 32 and the half shaft 39 is not released.
  • the hinge pin 36 now lies on another bulge 26b of the recess 26.
  • the handle 30 has the shown configuration. According to FIG.
  • the contacts 14, 17 were opened by responding to the trigger 15, by releasing the latch between the latch lever 32 and the half-shaft 39 by bending the bimetals 10.
  • the hinge pin 36 of the toggle lever 33 now lies in a bulge 26c of the recess 26.
  • the handle 30 indicates a central position.
  • the tension springs 38 each skip the dead center position.
  • Fig; 4 it can be seen that the short lever arm 28b, 29b of the drive lever 28, 29 is chamfered and is arranged opposite an extension 41 of the selector shaft.
  • This arrangement serves to mechanically break the contacts 14, 17 if they are welded to one another and cannot be separated, although the handle 30 is brought in the direction of the exhibition according to FIG. 2.
  • Such a welded state is shown in FIG. 4.
  • the trigger 15 has triggered, so that the latch 32b / 39 is released. Since the contacts 14, 17 are welded, they could not separate.
  • the handle 30 has the position shown and the bevel 28c bears against the shoulder 41.
  • FIG. 6 shows another embodiment, according to which a projection 51 of this control shaft now serves as the approach to the control shaft 37.
  • the mounting bridge 25 according to FIG. 7 has end openings 42 for receiving projections 43 of the bearing plates 21, 22. Furthermore, the mounting bridge 25 has at least one bore 44 for receiving a fastening screw 45. To fasten the switch lock 20, it is inserted with its mounting webs 23, 24 into the housing receptacles 46 and then screwed into place on the housing via the fastening screw 45.
  • the switching lock composed of the individual parts forms a ready-to-assemble structural unit which is inserted into the prepared housing receptacles 46 by hand or automatically with the mounting webs and is then fixed by means of screws 45 via the mounting bridge 25.
  • the housing 11 can be designed in such a way that the parts of the bearing plates protruding like a flag are secured against lateral displacements by projecting housing parts.
  • the switching lock 20 itself is composed such that the bearing plates 21, 22 are connected to one another by the attached bridge 25. If necessary, the bridge 25 can be firmly connected to the bearing plates 21, 22 by riveting the parts 43.
  • the pawl lever 32 is seated above its bearing pin 31 via stepped ends in the bearing plates 21, 22. The bearing plates are held at a certain desired distance by the settling of the bearing pin. The separated ends of the bearing bolt passing through the bearing plates can be riveted if necessary.
  • the two parts 28, 29 of the drive lever are also connected to one another by a stepped bearing pin 27 which holds the parts 28, 29 at a fixed mutual distance.
  • the stepped ends of the bearing pin 27 penetrate both the parts 28, 29 and the bearing plates 21, 22 at the provided bearing openings.
  • the ends of the bearing pin 27 can be flanged or riveted if necessary.
  • a special spacer bolt can also be provided at the end of the parts of the bearing plates projecting like flags, which can also be flanged at the end if necessary.
  • the springs 38 engage on the one hand on the hinge pin 36 and on the other hand on a spring pin 48 which is simply inserted into semicircular recesses on the outside of the drive lever 28, 29.
  • Spring pin 48 and hinge pin 36 can be constructed identically.
  • the suspended springs 38 give the system consisting of the drive lever 28, 29, the toggle lever 33 and the ratchet lever 32 great stability.
  • the spring bolt 48 is constricted for the engagement of the springs 38 and the holder in the semicircular recesses.
  • a driving pin is designated, which can also be designed as a stepped spacer. It is used for mechanical action on the latch lever 32 in the area of the hinge pin 32a for reclosing after a trip.
  • the drive lever 28, 29 is moved to the right for relocking, the driving pin 47 takes the pawl lever 32 with it. until its nose 32b re-latches at point 39. Then, by moving the drive lever 28, 29 to the left, the movable contacts 17 are switched on. This takes place in that the toggle lever 33 exceeds its dead center position and causes a sudden switch-on.
  • the drive lever 28, 29 is designed in this way. that the bearing pin 31 forms a limitation for the movement of the lever 28, 29 both in the on position according to FIG. 1 and in the off position according to FIG. 2 (see the outer grooves 52 and the spur-shaped projections 49).
  • the hinge pin 36 of the toggle lever 33 can be guided in the recess 26 as in the exemplary embodiment according to FIG. 1. Under certain circumstances, however, this can lead to undesirable friction losses. Such guidance of the pivot pin 36 in the recess 26 is not required for the lock to function.
  • the throat 50 of the drive lever 28, 29 can also serve as a stop for the bolt 36 in the setting.
  • a stop on the parts 26b, 26c for the hinge pin 36 in the off position or in the released position is not absolutely necessary for the function. In these positions, namely, the movable contact lever 17 rests on the fixed bearing pin 27. This also limits the maximum movement of the hinge pin 36, which is connected to the movable contact 17 via the lever 35.
  • the function of the driving pin 47 can also be achieved by the attached handle 30, in that it is provided on the inside with a corresponding extension for acting on the latch lever 32.
  • the handle 30 can also be provided on the inside with corresponding grooves for placement on the parts 28, 29. This particularly simple type of assembly of the handle 30 also stabilizes the double lever consisting of the two parts 28, 29.
  • FIG. 8 shows a longitudinal section through a circuit breaker, in which the switch lock and switching shaft are detachably coupled together.
  • 9 and 10 show two associated assembly steps for producing this connection, each in partial sections and in an enlarged view according to FIG. 8. Otherwise, FIG. 8 essentially corresponds to FIG. 1. Only the bearing plates 21 have in this embodiment Opened at the top recesses which also have no pronounced bulges as in Fig. 1.
  • the free end of the lever arm 35 has an open elongated hole 53 which is undercut. With the slot 53, the lever arm 35 is pushed onto a coupling bolt 54 of the selector shaft 37. With 55 a leaf spring is designated, which presses the lever arm 35 against the coupling bolt 54 in the fully assembled state and thus causes a non-positive connection between the control shaft 37 on the one hand and lever arm 35 or switch lock 20 on the other.
  • the coupling bolt 54 is firmly seated on the movable contact piece 17 and serves to also mount this movable contact piece 17 in a simple manner in an elongated hole 56 of the selector shaft 37.

Abstract

In a switch latch for an electric switching apparatus with a support part for securing the latch mechanism, the support part and the turning parts are, in order to enable an automatic assembly, flat, preferably stamped parts, simple bolts being further provided to be used as positioning and connection bolts as well as traction springs used as spring elements.

Description

Die Erfindung bezieht sich auf ein Schaltschloß gemäß dem Oberbegriff des Anspruchs 1. Ein solches Schaltschloß ist z. B. durch die US-A-2 956 135 bekannt geworden. Die bekannte Bauart zeigt einen Motorschutz-Schalter, dessen Schloßmechanik in einem u-förmigen Trägerteil aus Metallblech aufgenommen ist, wobei die Grundplatte auf einer Trägerplatte befestigt ist. Die Befestigung des Schaltschlosses auf der Trägerplatte erfolgt mittels Schrauben von der Rückseite der Trägerplatte her. Die Trägerplatte mit dem Schaltschloß ist wiederum auf dem Gehäuseboden festgeschraubt. Die Wandungen und die Bodenplatte dieses u-förmigen Trägerteils der Schloßmechanik sind als ebene Teile ausgebildet. Die Lagerbolzen und die Verbindungsbolzen dieses bekannten Schaltschlosses sind als einfache Bolzen und die Federelemente als einfache Zugfedern ausgeführt.The invention relates to a switch lock according to the preamble of claim 1. Such a switch lock is such. B. known from US-A-2 956 135. The known type shows a motor protection switch, the lock mechanism is accommodated in a U-shaped support part made of sheet metal, the base plate being fastened to a support plate. The key switch is attached to the carrier plate by means of screws from the rear of the carrier plate. The carrier plate with the key switch is in turn screwed onto the housing base. The walls and the base plate of this U-shaped support part of the lock mechanism are designed as flat parts. The bearing bolts and the connecting bolts of this known switch lock are designed as simple bolts and the spring elements as simple tension springs.

Die US-A-3 194 922 zeigt ein Niederspannungs-Schaltgerät für Beleuchtungsanlagen oder ähnliche Anlagen mit geringer elektrischer Leistung, bei dem die Schloßmechanik zwischen isolierenden ebenen Seitenwänden aufgenommen ist. Das Schaltschloß wird mit Klammern, die in entsprechende Öffnungen der Seitenwände greifen, am Boden des Schaltgehäuses befestigt. Die Klammern werden mittels Schrauben angezogen, die durch den Gehäuseboden eingeführt werden.US-A-3 194 922 shows a low-voltage switching device for lighting systems or similar systems with low electrical power, in which the lock mechanism is accommodated between insulating flat side walls. The switch lock is fastened to the bottom of the switch housing with clips that engage in corresponding openings in the side walls. The clips are tightened using screws that are inserted through the bottom of the case.

Aus der DE-C-921 878 ist ein Trägerteil für einen einpoligen Kleinselbstschalter bekannt, bei dem zwischen zwei Lagerplatten die Schaltmechanik aufgenommen ist. Die Lagerplatten sind mit Füßen versehen, die in Schlitze des Sockels greifen. Durch Verschieben der Füße in den Schlitzen oder durch eine auf die Füße wirkende Klemmung lassen sich die Lagerplatten mit der Schaltmechanik schraubenlos auf dem Sockel befestigen. Dabei sorgt ein einsetzbares Querteil dafür, daß die Lagerplatten nicht gegeneinander verschoben werden können.From DE-C-921 878 a carrier part for a single-pole miniature auto switch is known, in which the switching mechanism is accommodated between two bearing plates. The bearing plates are provided with feet that engage in slots in the base. By moving the feet in the slots or by means of a clamp acting on the feet, the bearing plates can be attached to the base without screws using the switching mechanism. An insertable cross member ensures that the bearing plates cannot be moved against each other.

Der Erfindung liegt die Aufgabe zugrunde, ein Schaltschloß der eingangs genannten Art montagefreundlicher zu gestalten und damit die Herstellung von Schaltgeräten zu vereinfachen.The invention has for its object to make a switch lock of the type mentioned easier to assemble and thus simplify the manufacture of switching devices.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.

Durch die erfindungsgemäße Ausgestaltung des Schaltschlosses ergibt sich die Möglichkeit einer automatischen Montage, indem das als montagefertige Baueinheit hergestellte Schaltschloß auf einfache Weise in ein Schaltgerätgehäuse eingebaut werden kann. Dieses Einbauen kann z. B. automatisch dadurch erfolgen, daß das Schaltschloß mit den rechtwinklig abstehenden Montagestegen in vorbereitete, angepaßte Gehäuseaussparungen eingesetzt wird und über eine Montagebrücke durch Befestigungsmittel, z. B. Schrauben, an gehäusefesten Teilen befestigt wird. Das Schaltschloß ist somit über drei Befestigungspunkte im Gehäuse befestigt, und zwar einmal über die beiden Stegenden, die in angepaßte Gehäuseöffnungen eingesteckt werden. und zum anderen über die Befestigungsmittel an der Montagebrücke. Diese drei Befestigungspunkte liegen etwa in derselben Befestigungsebene. Rechtwinklig abstehend zu dieser Befestigungsebene verlaufen dabei die beiden Lagerbleche, die nach Art von abstehenden Fahnen angeordnet sind und zwischen sich alle Schaltschloßteile aufnehmen. Da die Befestigungsmittel des Schaltschlosses an einem einzigen Ende angeordnet sind, können die fahnenartig abstehenden Lagerbleche voll zur Aufnahme der Schaltschloßteile ausgenutzt werden, ohne daß Befestigungsmittel für das Schaltschloß im Wege stehen. Ein auf diese Weise in ein elektrisches Schaltgerät eingebautes Schaltschloß ist in eine Polbahn integriert. Die vorliegende Erfindung wird vorzugsweise bei elektrischen Leistungsschaltern angewendet.The configuration of the switch lock according to the invention results in the possibility of automatic assembly, in that the switch lock manufactured as a ready-to-assemble unit can be easily installed in a switchgear housing. This installation can e.g. B. done automatically by the fact that the switch lock with the right-angled mounting webs is used in prepared, adapted housing recesses and over a mounting bridge by fasteners, for. B. screws, is attached to housing-fixed parts. The switch lock is thus fastened via three fastening points in the housing, namely once over the two web ends, which are inserted into adapted housing openings. and on the other hand via the fastening means on the assembly bridge. These three attachment points lie approximately in the same attachment level. The two bearing plates, which are arranged in the manner of protruding flags and which accommodate all the switching parts between them, extend at right angles to this fastening plane. Since the fasteners of the switch lock are arranged at a single end, the flag-like protruding bearing plates can be fully used for receiving the switch lock parts without the need for fasteners for the switch lock. A switch lock installed in this way in an electrical switching device is integrated in a pole track. The present invention is preferably applied to electrical circuit breakers.

Das Schaltschloß eignet sich vorteilhaft für eine automatische Montage, da das in die Gehäuseöffnungen für die Montagestege eingeführte Schaltschloß nur noch an einer Stelle, und zwar im Bereich der Montagebrücke, mittels einer Schraube oder dergleichen festgelegt zu werden braucht.The switch lock is advantageously suitable for automatic assembly, since the switch lock introduced into the housing openings for the mounting webs only needs to be fixed at one point, specifically in the area of the mounting bridge, by means of a screw or the like.

In Ausgestaltung der Erfindung bilden die Lagerbleche ortsfeste Drehlager für einen Antriebshebel und einen Klinkenhebel, wobei der Antriebshebel über mindestens eine Zugfeder mit dem Gelenkbolzen eines Kniehebels verbunden ist, dessen einer Hebelarm an dem Klinkenhebel angelenkt ist und dessen anderer Hebelarm zur Betätigung eines beweglichen Kontaktstückes des Schaltgerätes ausgebildet ist. Damit ergibt sich eine einfache Baueinheit mit zwei Drehlagern für den Antriebshebel einerseits und den Klinkenhebel andererseits, wobei der Kniehebel mit seinem einen freien Hebelarm an dem Klinkenhebel angelenkt ist. Antriebshebel, Klinkenhebel und Kniehebel befinden sich somit auf verschiedenen, einander parallelen Bewegungsebenen innerhalb der beiden Lagerbleche, die zu den Bewegungsebenen parallel verlaufen.In an embodiment of the invention, the bearing plates form fixed pivot bearings for a drive lever and a ratchet lever, the drive lever being connected via at least one tension spring to the hinge pin of a toggle lever, one lever arm of which is articulated on the ratchet lever and the other lever arm for actuating a movable contact piece of the switching device is trained. This results in a simple structural unit with two pivot bearings for the drive lever on the one hand and the ratchet lever on the other hand, the toggle lever being articulated on the ratchet lever with its one free lever arm. The drive lever, ratchet lever and toggle lever are thus located on different, mutually parallel planes of movement within the two bearing plates, which run parallel to the planes of movement.

Für eine automatische Fertigung des Schaltschlosses selbst sind die Lagerbleche mit der Montagebrücke durch Zusammenstecken verbunden. Dabei weist die Montagebrücke Öffnungen zum rastenden Eingreifen von Ansätzen der Lagerbleche auf und ist mit Bohrungen zur Aufnahme von Schrauben zwecks Befestigung in einem Schaltgerätegehäuse versehen. Der Grundaufbau des Rahmens für das Schaltschloß wird also durch einfaches Zusammenstecken der beiden Lagerbleche mit der querverlaufenden Montagebrücke erzielt. Diese Verbindung kann lösbar oder auch, z. B. durch Vernieten. fest sein. Dabei ergibt sich eine Bauart mit fahnenartig abstehenden Montageblechen, zwischen denen die genannten Schaltschloßteile einfach und ohne Behinderung durch Befestigungsmittel angeordnet werden können. Weitere vorteilhafte Ausgestaltungen sind den abhängigen Ansprüchen und der Beschreibung zu entnehmen.For automatic manufacture of the key switch itself, the bearing plates are connected to the assembly bridge by plugging them together. The mounting bridge has openings for the locking engagement of lugs of the bearing plates and is provided with holes for receiving screws for the purpose of fastening in a switchgear housing. The basic structure of the frame for the switch lock is thus achieved by simply plugging the two bearing plates together with the transverse mounting bridge. This connection can be detachable or, for. B. by riveting. be firm. This results in a design with tab-like protruding mounting plates, between which the switch parts mentioned can be arranged easily and without hindrance by fasteners. Another advantageous embodiment are to be found in the dependent claims and the description.

In der Zeichnung ist in den Figuren 1 bis 7 ein Ausführungsbeispiel des Gegenstandes gemäß der Erfindung dargestellt. Fig. 1 bis 4 zeigen jeweils geschnittene Seitenansichten eines Schaltgerätes mit einem erfindungsgemäßen Schaltschloß, wobei jeweils verschiedene Schaltstellungen vorgesehen sind. Fig. 5 zeigt eine Draufsicht auf das Schaltgerät gemäß Fig. 1 bis 4. Fig. 6 zeigt eine Einzelheit. Fig. 7a, b, c zeigen drei Ansichten des Schaltschlosses.In the drawing, an embodiment of the object according to the invention is shown in Figures 1 to 7. 1 to 4 each show sectional side views of a switching device with a switch lock according to the invention, wherein different switching positions are provided in each case. 5 shows a top view of the switching device according to FIGS. 1 to 4. FIG. 6 shows a detail. 7a, b, c show three views of the key switch.

Die Figuren 1 bis 4 zeigen einen Leistungsschalter 10 mit einem Kunststoffgehäuse 11. Der Leistungsschalter besitzt drei Polbahnen, von denen in Fig. 1 bis 4 jeweils nur eine erkennbar ist. Das Gehäuse 11 besitzt an den Stirnseiten jeweils drei Anschlußklemmen 12, 13 für die Zu- bzw. Ableitungen. Die Anschlußklemmen 12 sind mit einem Festkontaktstück 14 und die Anschlußklemmen 13 über eine Auslösereinheit 15 und eine flexible Leitung 16 mit einem beweglichen Kontaktstück 17 verbunden. Mit 18 ist ein aus mehreren einzelnen Löschblechen 19 bestehender Löschblechstapel bezeichnet. Zur Betätigung des beweglichen Kontaktstückes 17 dient ein Schaltschloß. Das Schaltschloß 20 besitzt zwei aus ebenen Stanzteilen gefertigte, parallel zueinander verlaufende Lagerbleche 21, 22, von denen in Fig. 1 bis 4 nur das hintere 21 zu sehen ist. Beide Lagerbleche 21, 22 besitzen je einen am Ende angeschrägten Montagesteg 23, 24 und sind durch eine Montagebrücke 25 lösbar miteinander verbunden (Figur 7). Die Lagerbleche 21, 22 besitzen je eine Ausnehmung 26 mit weiter unten beschriebenen Ausbuchtungen 26a, b, c.FIGS. 1 to 4 show a circuit breaker 10 with a plastic housing 11. The circuit breaker has three pole tracks, of which only one can be seen in FIGS. 1 to 4. The housing 11 has three terminals 12, 13 for the supply and discharge lines on the end faces. The connection terminals 12 are connected to a fixed contact piece 14 and the connection terminals 13 are connected to a movable contact piece 17 via a trigger unit 15 and a flexible line 16. 18 with a stack of several individual quenching plates 19 is designated. A switching lock is used to actuate the movable contact piece 17. The switching mechanism 20 has two bearing plates 21, 22 made of flat stamped parts and running parallel to one another, of which only the rear 21 can be seen in FIGS. 1 to 4. Both bearing plates 21, 22 each have a mounting web 23, 24 which is bevelled at the end and are detachably connected to one another by a mounting bridge 25 (FIG. 7). The bearing plates 21, 22 each have a recess 26 with bulges 26a, b, c described below.

Zwischen den Lagerblechen 21, 22 ist über einen Lagerbolzen 27 ein Antriebshebel gelagert, der als Doppelhebel ausgebildet und aus zwei mit Abstand zueinander angeordneten ebenen Stanzteilen 28, 29 besteht. Die Stanzteile 28, 29 bilden einen zweiarmigen Drehhebel mit einem langen Hebelarm 28a, 29a undeinem kurzen Hebelarm 28b, 29b. Am Ende des langen Hebelarmes 28a, 29a ist eine Handhabe 30 zur Betätigung des Schaltschlosses vorgesehen. Die Teile 28, 29 sind verbunden durch die Bolzen 27 und 47, 48 (s. unten).Between the bearing plates 21, 22, a drive lever is mounted via a bearing pin 27, which is designed as a double lever and consists of two flat stamped parts 28, 29 arranged at a distance from one another. The stamped parts 28, 29 form a two-armed rotary lever with a long lever arm 28a, 29a and a short lever arm 28b, 29b. At the end of the long lever arm 28a, 29a, a handle 30 is provided for actuating the key switch. The parts 28, 29 are connected by the bolts 27 and 47, 48 (see below).

Zwischen den Lagerblechen 21, 22 ist über einen weiteren Lagerbolzen 31 ein ebener, gestanzter Klinkenhebel 32 gelagert. Der Klinkenhebel 32 ist als einarmiger Winkelhebel ausgebildet. Das Schloß 20 besitzt schließlich einen Kniehebel 33 mit einem Hebelarm 34 und einem Hebelarm 35, die durch einen Gelenkbolzen 36 miteinander verbunden sind. Die Hebelarme 34, 35 sind jeweils als Doppelhebelarme 34a, b bzw. 35a, b ausgebildet. Der eine doppelarmige Hebelarm 34a, b ist im Winkelbereich des Winkelhebels 32 über einen Gelenkbolzen 32a angelenkt. Der doppelarmige Hebelarm 35a. b ist an einen Schaltwelle 37 angelenkt, die ihrerseits die beweglichen Kontaktstücke 17 trägt. Zwischen dem Gelenkbolzen 36 und dem oberen Antriebshebel sitzen zwei Zugfedern 38.Between the bearing plates 21, 22, a flat, punched pawl lever 32 is mounted via a further bearing pin 31. The ratchet lever 32 is designed as a one-armed angle lever. The lock 20 finally has a toggle lever 33 with a lever arm 34 and a lever arm 35, which are connected to one another by a hinge pin 36. The lever arms 34, 35 are each designed as double lever arms 34a, b and 35a, b. The one double-arm lever arm 34a, b is articulated in the angular range of the angle lever 32 via a hinge pin 32a. The double-armed lever arm 35a. b is articulated on a switching shaft 37, which in turn carries the movable contact pieces 17. Two tension springs 38 are seated between the hinge pin 36 and the upper drive lever.

Fig. 1 zeigt den Schalter in eingeschaltetem Zustand, d. h. bei geschlossenen Kontakten 14, 17. Das Schaltschloß 20 ist verklinkt, d. h. der Klinkenhebel 32 liegt mit einer Nase 32b an einer Halbwelle 39, die im Falle eines Überstromes, z. B. durch Bimetalle 40 gedreht werden kann. In dieser Stellung liegt der Lagerbolzen 36 des Kniehebels in einer Ausbuchtung 26a der Ausnehmung 26. Fig. 2 zeigt eine Stellung, in der der Schalter 10 von Hand ausgeschaltet wurde, wobei der Auslöser 15 nicht angesprochen hat, d. h. die Verklinkung zwischen dem Klinkenhebel 32 und der Halbwelle 39 ist nicht gelöst. Der Gelenkbolzen 36 liegt jetzt an einer anderen Ausbuchtung 26b der Ausnehmung 26. Die Handhabe 30 hat die gezeigte Ausstellung. Demäß Fig. 3 wurden die Kontakte 14, 17 durch Ansprechen des Auslösers 15 geöffnet, indem durch Ausbiegen der Bimetalle 10 die Verklinkung zwischen dem Klinkenhebel 32 und der Halbwelle 39 gelöst wurde. Der Gelenkbolzen 36 des Kniehebels 33 liegt nunmehr in einer Ausbuchtung 26c der Ausnehmung 26. Die Handhabe 30 zeigt eine Mittelstellung an. Die Zugfedern 38 überspringen jeweils die Totpunktlage.Fig. 1 shows the switch in the on state, i. H. with closed contacts 14, 17. The switching lock 20 is latched, d. H. the pawl lever 32 is located with a nose 32b on a half shaft 39 which, in the event of an overcurrent, e.g. B. can be rotated by bimetallic 40. In this position, the bearing pin 36 of the toggle lever lies in a bulge 26a of the recess 26. FIG. 2 shows a position in which the switch 10 was switched off manually, the trigger 15 not responding, i. H. the latching between the ratchet lever 32 and the half shaft 39 is not released. The hinge pin 36 now lies on another bulge 26b of the recess 26. The handle 30 has the shown configuration. According to FIG. 3, the contacts 14, 17 were opened by responding to the trigger 15, by releasing the latch between the latch lever 32 and the half-shaft 39 by bending the bimetals 10. The hinge pin 36 of the toggle lever 33 now lies in a bulge 26c of the recess 26. The handle 30 indicates a central position. The tension springs 38 each skip the dead center position.

Gemäß Fig ; 4 ist erkennbar, daß der kurze Hebelarm 28b, 29b des Antriebshebels 28, 29 angeschrägt ist und gegenüber einem Ansatz 41 der Schaltwelle angeordnet ist. Diese Anordnung dient dazu, um die Kontakte 14, 17 mechanisch aufzubrechen, falls sie miteinander verschweißt sind und nicht getrennt werden können, obwohl die Handhabe 30 in Richtung der Austellung gemäß Fig. 2 gebracht wird. Einen derartigen verschweißten Zustand zeigt Fig. 4. Dabei hat der Auslöser 15 angesprochen, so daß die Verklinkung 32b/39 gelöst ist. Da die Kontakte 14, 17 verschweißt sind, konnten sie sich nicht trennen. Die Handhabe 30 hat die gezeichnete Lage und die Schräge 28c liegt am Ansatz 41 an. Wird in diesem Fall die Handhabe 30 weiter in Richtung Ausstellung bewegt, so wird durch den Antriebshebel 28, 29 ein Drehmoment auf die Schaltwelle 37 ausgeübt, das in Richtung einer Kontaktöffnung des beweglichen Kontaktes 17 wirkt. Fig. 6 zeigt eine andere Ausführung, wonach als Ansatz der Schaltwelle 37 nunmehr eine Anformung 51 dieser Schaltwelle dient.According to Fig; 4 it can be seen that the short lever arm 28b, 29b of the drive lever 28, 29 is chamfered and is arranged opposite an extension 41 of the selector shaft. This arrangement serves to mechanically break the contacts 14, 17 if they are welded to one another and cannot be separated, although the handle 30 is brought in the direction of the exhibition according to FIG. 2. Such a welded state is shown in FIG. 4. In this case, the trigger 15 has triggered, so that the latch 32b / 39 is released. Since the contacts 14, 17 are welded, they could not separate. The handle 30 has the position shown and the bevel 28c bears against the shoulder 41. If in this case the handle 30 is moved further towards the exhibition, the drive lever 28, 29 exerts a torque on the control shaft 37, which acts in the direction of a contact opening of the movable contact 17. FIG. 6 shows another embodiment, according to which a projection 51 of this control shaft now serves as the approach to the control shaft 37.

Die Montagebrücke 25 gemäß Fig. 7 besitzt endseitige Öffnungen 42 zur Aufnahme von Ansätzen 43 der Lagerbleche 21, 22. Ferner weist die Montagebrücke 25 mindestens eine Bohrung 44 zur Aufnahme einer Befestigungsschraube 45 auf. Zur Befestigung des Schaltschlosses 20 wird dieses mit seinen Montagestegen 23, 24 in Gehäuseaufnahmen 46 eingeführt und sodann über die Befestigungsschraube 45 am Gehäuse ortsfest verschraubt.The mounting bridge 25 according to FIG. 7 has end openings 42 for receiving projections 43 of the bearing plates 21, 22. Furthermore, the mounting bridge 25 has at least one bore 44 for receiving a fastening screw 45. To fasten the switch lock 20, it is inserted with its mounting webs 23, 24 into the housing receptacles 46 and then screwed into place on the housing via the fastening screw 45.

Durch die ebene Ausbildung der Lagerbleche. der Montagebrücke, der Teile des Antriebshebels 28, 29, des Klinkenhebels 32 und des Kniehebels 33 und durch die Verwendung von einfachen Bolzen als Lagerbolzen 27, 31, 36, 32a und Verbindungsbolzen 47, 48 ergibt sich die Möglichkeit einer automatischen Montage, da diese Teile leicht stapelbar und magazinierbar sind. Das aus den Einzelteilen zusammengesetzte Schaltschloß bildet eine montagefertige Baueinheit, die von Hand oder automatisch mit den Montagestegen in die vorbereiteten Gehäuseaufnahmen 46 eingesetzt wird und sodann über die Montagebrücke 25 durch Schrauben 45 festgelegt wird. Dabei kann das Gehäuse 11 derart ausgebildet sein, daß die fahnenartig abstehenden Teile der Lagerbleche durch vorspringende Gehäuseteile gegen seitliche Verschiebungen gesichert sind.Due to the flat design of the bearing plates. the mounting bridge, the parts of the drive lever 28, 29, the ratchet lever 32 and the toggle lever 33 and by using simple bolts as bearing bolts 27, 31, 36, 32a and connecting bolts 47, 48, there is the possibility of automatic assembly, since these parts are easy to stack and store. The switching lock composed of the individual parts forms a ready-to-assemble structural unit which is inserted into the prepared housing receptacles 46 by hand or automatically with the mounting webs and is then fixed by means of screws 45 via the mounting bridge 25. The housing 11 can be designed in such a way that the parts of the bearing plates protruding like a flag are secured against lateral displacements by projecting housing parts.

Das Schaltschloß 20 selbst ist derart zusammengesetzt, daß die Lagerbleche 21. 22 durch die aufgesteckte Brücke 25 miteinander verbunden sind. Bei Bedarf kann die Brücke 25 mit den Lagerblechen 21, 22 durch Vernieten der Teile 43 fest verbunden werden. Der Klinkenhebel 32 sitzt über seinen Lagerbolzen 31 über abgesetzte Enden in den Lagerblechen 21, 22. Durch die Absetzungen des Lagerbolzens werden die Lagerbleche auf einen bestimmten gewünschten Abstand gehalten. Die durch die Lagerbleche hindruchgehenden abgesetzten Enden des Lagerbolzens können bei Bedarf vernietet werden. Die beiden Teile 28, 29 des Antriebshebels sind ebenfalls durch einen abgesetzten Lagerbolzen 27 miteinander verbunden, der die Teile 28, 29 auf einen festen gegenseitigen Abstand hält. Hierbei durchsetzen die abgesetzten Enden des Lagerbolzens 27 sowohl die Teile 28, 29 als auch die Lagerbleche 21, 22 an vorgesehenen Lageröffnungen. Auch hierbei können die Enden des Lagerbolzens 27 bei Bedarf umgebördelt oder vernietet werden. Aus Stabilitätsgründen kann auch am Ende der fahnenartig abstehenden Teile der Lagerbleche ein besonderer Distanzbolzen vorgesehen sein, der bei Bedarf endseitig ebenfalls umgebördelt werden kann.The switching lock 20 itself is composed such that the bearing plates 21, 22 are connected to one another by the attached bridge 25. If necessary, the bridge 25 can be firmly connected to the bearing plates 21, 22 by riveting the parts 43. The pawl lever 32 is seated above its bearing pin 31 via stepped ends in the bearing plates 21, 22. The bearing plates are held at a certain desired distance by the settling of the bearing pin. The separated ends of the bearing bolt passing through the bearing plates can be riveted if necessary. The two parts 28, 29 of the drive lever are also connected to one another by a stepped bearing pin 27 which holds the parts 28, 29 at a fixed mutual distance. Here, the stepped ends of the bearing pin 27 penetrate both the parts 28, 29 and the bearing plates 21, 22 at the provided bearing openings. Here, too, the ends of the bearing pin 27 can be flanged or riveted if necessary. For reasons of stability, a special spacer bolt can also be provided at the end of the parts of the bearing plates projecting like flags, which can also be flanged at the end if necessary.

Die Federn 38 greifen einerseits am Gelenkbolzen 36 und andererseits an einem Federbolzen 48 an, der einfach in halbkreisförmige Ausnehmungen an der Außenseite des Antriebshebels 28, 29 eingelegt ist. Federbolzen 48 und Gelenkbolzen 36 können identisch aufgebaut sein. Die eingehängten Federn 38 verleihen dem aus dem Antriebshebel 28, 29, dem Kniehebel 33 und dem Klinkenhebel 32 bestehenden System eine große Stabilität. Der Federbolzen 48 ist mit Einschnürungen für den Angriff der Federn 38 und die Halterung in den halbkreisförmigen Ausnehmungen versehen.The springs 38 engage on the one hand on the hinge pin 36 and on the other hand on a spring pin 48 which is simply inserted into semicircular recesses on the outside of the drive lever 28, 29. Spring pin 48 and hinge pin 36 can be constructed identically. The suspended springs 38 give the system consisting of the drive lever 28, 29, the toggle lever 33 and the ratchet lever 32 great stability. The spring bolt 48 is constricted for the engagement of the springs 38 and the holder in the semicircular recesses.

Mit 47 ist ein Mitnahmebolzen bezeichnet, der auch als abgesetzter Distanzbolzen ausgebildet sein kann. Er dient zur mechanischen Einwirkung auf den Klinkenhebel 32 im Bereich der Gelenkbolzen 32a zur Wiedereinschaltung nach einer Auslösung. Hierzu wird der Antriebshebel 28, 29 zur Wiederverklinkung nach rechts bewegt, dabei nimmt der Mitnahmebolzen 47 den Klinkenhebel 32 mit. bis dessen Nase 32b an der Stelle 39 wiederverklinkt. Danach erfolgt durch Bewegung des Antriebshebels 28, 29 nach links eine Einschaltung der beweglichen Kontakte 17. Dies erfolgt dadurch, daß der Kniehebel 33 seine Totpunktlage überschreitet und eine schlagartige Einschaltung bewirkt.With 47 a driving pin is designated, which can also be designed as a stepped spacer. It is used for mechanical action on the latch lever 32 in the area of the hinge pin 32a for reclosing after a trip. For this purpose, the drive lever 28, 29 is moved to the right for relocking, the driving pin 47 takes the pawl lever 32 with it. until its nose 32b re-latches at point 39. Then, by moving the drive lever 28, 29 to the left, the movable contacts 17 are switched on. This takes place in that the toggle lever 33 exceeds its dead center position and causes a sudden switch-on.

Der Antriebshebel 28, 29 ist derart ausgebildet. daß der Lagerbolzen 31 sowohl in der Ein-Stellung nach Fig. 1 als auch in der Aus-Stellung nach Fig. 2 eine Begrenzung für die Bewegung des Hebels 28, 29 bildet (siehe die Außenkehlen 52 und die sporenförmigen Ansätze 49).The drive lever 28, 29 is designed in this way. that the bearing pin 31 forms a limitation for the movement of the lever 28, 29 both in the on position according to FIG. 1 and in the off position according to FIG. 2 (see the outer grooves 52 and the spur-shaped projections 49).

Der Gelenkbolzen 36 des Kniehebels 33 kann wie im Ausführungsbeispiel nach Fig. 1 in der Ausnehmung 26 geführt werden. Dies kann jedoch unter Umständen zu unerwünschten Reibungsverlusten führen. Für eine Funktion des Schlosses ist eine derartige Führung des Gelenkbolzens 36 in der Ausnehmung 26 nicht erforderlich. Als Anschlag für den Bolzen 36 in der EinStellung kann auch die Kehle 50 des Antriebshebels 28, 29 dienen. Auch ein Anschlag an den Teilen 26b, 26c für den Gelenkbolzen 36 in der Aus-Stellung bzw. in der Ausgelöst-Stellung ist für die Funktion nicht unbedingt erforderlich. In diesen Stellungen liegt nämlich der bewegliche Kontakthebel 17 an dem ortsfesten Lagerbolzen 27 an. Damit ist auch die maximale Bewegung des Gelenkbolzens 36 begrenzt, der über die Hebel 35 mit dem beweglichen Kontakt 17 verbunden ist.The hinge pin 36 of the toggle lever 33 can be guided in the recess 26 as in the exemplary embodiment according to FIG. 1. Under certain circumstances, however, this can lead to undesirable friction losses. Such guidance of the pivot pin 36 in the recess 26 is not required for the lock to function. The throat 50 of the drive lever 28, 29 can also serve as a stop for the bolt 36 in the setting. A stop on the parts 26b, 26c for the hinge pin 36 in the off position or in the released position is not absolutely necessary for the function. In these positions, namely, the movable contact lever 17 rests on the fixed bearing pin 27. This also limits the maximum movement of the hinge pin 36, which is connected to the movable contact 17 via the lever 35.

Die Funktion des Mitnahmebolzens 47 kann auch durch die aufgesetzte Handhabe 30 erreicht werden, in dem diese an der Innenseite mit einem entsprechenden Ansatz zur Einwirkung auf den Klinkenhebel 32 versehen ist. Die Handhabe 30 kann an der Innenseite auch mit entsprechenden Nuten zum Aufsetzen auf die Teile 28, 29 versehen sein. Durch diese besonders einfache Art der Montage der Handhabe 30 wird außerdem eine Stabilisierung des aus den beiden Teilen 28, 29 bestehenden Doppelhebels bewirkt.The function of the driving pin 47 can also be achieved by the attached handle 30, in that it is provided on the inside with a corresponding extension for acting on the latch lever 32. The handle 30 can also be provided on the inside with corresponding grooves for placement on the parts 28, 29. This particularly simple type of assembly of the handle 30 also stabilizes the double lever consisting of the two parts 28, 29.

Durch die lösbare Verbindung zwischen dem Schaltschloß und der Schaltwelle entsprechend den Ansprüchen 8 bis 16 ist es möglich, die Schaltwelle mit den beweglichen Kontakten und den eventuell damit verbundenen Bimetallen einerseits sowie das Schloß anderseits getrennt voneinander zu montieren. Dabei erfolgt zunächst die Montage der Schaltwelle mit den beweglichen Kontakten und den Bimetallstreifen im Gehäuseunterteil, sodann kann das komplett vormontierte Schaltschloß über das mit einem Langloch versehene freie Ende des Hebelarmes mit der Schaltwelle durch einfaches Zusammenstecken gekuppelt werden. Die getrennte Montage der beiden Baueinheiten bedeutet eine Montageerleichterung und ermöglicht die Montage beider Einheiten von nur einer Montagerichtung her, wodurch eine automatische Montage möglich wird.Due to the detachable connection between the switch lock and the control shaft according to claims 8 to 16, it is possible to mount the control shaft with the movable contacts and the bimetals possibly associated with them on the one hand and the lock on the other hand separately. First the assembly of the selector shaft with the movable contacts and the bimetallic strip in the lower part of the housing, then the completely pre-assembled switch lock can be coupled to the selector shaft by simply plugging it together with the free end of the lever arm provided with an elongated hole. The separate assembly of the two units makes assembly easier and enables the assembly of both units from just one assembly direction, which enables automatic assembly.

Fig. 8 zeigt einen Längsschnitt durch einen Leistungsschalter, bei dem Schaltschloß und Schaltwelle lösbar miteinander gekuppelt sind. Fig. 9 und 10 zeigen zwei zugehörige Montageschritte zur Herstellung dieser Verbindung, jeweils in Teilausschnitten und in vergrößerter Darstellung gemäß Fig. 8. Im übrigen entspricht Fig. 8 im wesentlichen der Fig. 1. Nur die Lagerbleche 21 besitzen bei diesem Ausführungsbeispiel nach oben geöffnet Ausnehmungen, die überdies keine ausgeprägten Ausbuchtungen wie bei Fig. 1 aufweisen.Fig. 8 shows a longitudinal section through a circuit breaker, in which the switch lock and switching shaft are detachably coupled together. 9 and 10 show two associated assembly steps for producing this connection, each in partial sections and in an enlarged view according to FIG. 8. Otherwise, FIG. 8 essentially corresponds to FIG. 1. Only the bearing plates 21 have in this embodiment Opened at the top recesses which also have no pronounced bulges as in Fig. 1.

Das freie Ende des Hebelarmes 35 weist ein offenes Langloch 53 auf, das hinterschnitten ausgebildet ist. Mit dem Langloch 53 ist der Hebelarm 35 auf einen Kupplungsbolzen 54 der Schaltwelle 37 geschoben. Mit 55 ist eine Blattfeder bezeichnet, die im fertigmontierten Zustand den Hebelarm 35 gegen den Kupplungsbolzen 54 preßt und somit eine kraftschlüssige Verbindung zwischen Schaltwelle 37 einerseits und Hebelarm 35 bzw. Schaltschloß 20 andererseits bewirkt. Der Kupplungsbolzen 54 sitzt fest am beweglichen Kontaktstück 17 und dient sazu, dieses bewegliche Kontaktstück 17 ebenfalls auf einfache Weise in einem Langloch 56 der Schaltwelle 37 zu lagern. Im eingesetzten Zustand wird dabei das bewegliche Kontaktstück 17 durch Zugfedern 57, die gleichzeitig als Kontaktkraftfedern dienen, gegen den Grund des offenen Langloches 56 gepreßt. Damit ergibt sich ein elektrodynamisch öffnendes Kontaktsystem. Durch die lösbare Verbindung zwischen Schaltschloß 20 und Schaltwelle 37 ist es jetzt möglich, auch die mit der Schaltwelle 37 verbundenen Bimetalle 40 von innen her zu montieren, und zwar über die jetzt gut zugänglichen Befestigungsschrauben 58. Somit ergibt sich nur eine einzige Montagerichtung und damit die Möglichkeit zu einer automatischen Montage. Mit 59 ist die Montage-Einführrichtung für den Hebelarm 35 bezeichnet. In fig. 10 hat die Blattfeder 55' eine etwas andere Form als in Fig. 9. Hier ist ferner das in Fig. 8 sichtbare vordere Teil der Schaltwelle 37 mit dem einen Langloch 56 für den Bolzen 54 aus Gründen der Übersichtlichkeit nicht eingezeichnet.The free end of the lever arm 35 has an open elongated hole 53 which is undercut. With the slot 53, the lever arm 35 is pushed onto a coupling bolt 54 of the selector shaft 37. With 55 a leaf spring is designated, which presses the lever arm 35 against the coupling bolt 54 in the fully assembled state and thus causes a non-positive connection between the control shaft 37 on the one hand and lever arm 35 or switch lock 20 on the other. The coupling bolt 54 is firmly seated on the movable contact piece 17 and serves to also mount this movable contact piece 17 in a simple manner in an elongated hole 56 of the selector shaft 37. In the inserted state, the movable contact piece 17 is pressed against the bottom of the open elongated hole 56 by tension springs 57, which also serve as contact force springs. This results in an electrodynamically opening contact system. Due to the detachable connection between the switching mechanism 20 and the switching shaft 37, it is now possible to mount the bimetals 40 connected to the switching shaft 37 from the inside, using the now easily accessible fastening screws 58. This results in only one mounting direction and thus the Possibility of automatic assembly. With 59 the assembly insertion direction for the lever arm 35 is designated. In fig. 10, the leaf spring 55 'has a somewhat different shape than in FIG. 9. Furthermore, the front part of the control shaft 37 visible in FIG. 8 with the one elongated hole 56 for the bolt 54 is not shown for reasons of clarity.

Claims (23)

1. Switch latch for integration into a pole path of a switching device (10) with a carrier part which for the mounting of a latch mechanism displays two planar, parallelly arranged metal bearing plates (21, 22), which are connected one with the other by a web, wherein the components (21, 22, 25) of the carrier part and the levers (28, 29, 32, 33) of the latch mechanism are constructed as planar parts and rotatably mounted in the carrier part, wherein furthermore simple pins are provided as bearing pins (27, 31, 36, 32a) and connecting pins (47, 48) and simple tension springs serve as spring elements (38). characterised thereby, that the metal bearing plates (21. 22) are held at a spacing each from the other by stepped spacer pins and in prolongation on each side display a respective mounting web (23. 24). which lies in the plane of the metal bearing plate (21 or 22), projects at a right angle and is detentable in a respective precisely fitting recept- able (46) of the switching device housing (11 and that a mounting bridge (25) at the side lying opposite the web ends forms the web connecting the metal bearing plates (21. 22), in the region of which the switch latch (20) is fastenable by way of fastening means (45) at parts fast with the hous- irig. wherein the three fastening points formed in the region of the mounting bridge (25) of both the mounting webs (23. 24) and housing receptables (46) as well as the fastening means (45) lie in about the same plane.
2. Switch latch according to claim 1, characterised thereby, that the metal bearing plates (21, 22) form locally fixed rotary bearings (bearing pins 27, 31) for a drive lever (28, 29) and a pawl lever (32) and that the drive lever (28, 29) is connected by way of at least one tension spring (38) with the hing pin (36) of a bent lever (33), the one lever arm (34) of which is articulated at the pawl lever (32) and the other lever arm (35) of which is constructed for the actuation of a mov-contact member (17) of the switching device (10).
3. Switch latch according to claim 1 or 2, characterised thereby, that the planar parts are produced by punching. 4. Switch latch according to one of the claims 2 and 3, characterised thereby, that bearing pins (27, 31) ; the ends of which are borned in respective bores of the metal bearing plates (21, 22), are provided for the formation of the rotary bearings of the drive lever (28, 29) and of the pawl lever (32).
5. Switch latch according to one of the claims 1 to 4, characterised thereby, that the metal bearing plates (21, 22) are detachably connected with the mounting bridge (25) and that the mounting bridge (25) displays openings (42) for the detenting engagement of projections (43) of the metal bearing plastes (21, 22) and is provided with at least one bore (44) for the reception of a fastening screw (45) for the purpose of fastening in a switching device housing (11).
6. Switch latch according to one of the claims 2 to 5, characterised thereby, that the bearing pin (27) of the drive lever (28, 29) and/or the bearing pin (31) of the pawl lever (32) are constructed as spacer pins.
7. Switch latch according to one of the claims 2 to 6, characterised thereby, that the drive lever is constructed as double lever and displays two parts (28, 29) each arranged at a spacing from the other and both held together, that both the parts (28, 29) are adjacent the metal bearing plates (21, 22) and that two tension springs (38) engage at the end which is remote from the rotational centre and provided with a handle (30).
8. Switch latch according to one of the claims 2 to 7, characterised thereby, that the drive lever (28, 29) is constructed as two-armed rotary lever with a short (28b. 29b) and a long (28a, 29a) lever arm and that the tension springs (38) engage at the end of the long lever arm (28a, 29a) provided with the handle (30).
9. Switch latch according to one of the claims 2 to 8, characterised thereby, that the pawl lever (32) is constructed as one-armed angle lever ; the free end (32b) of which is constructed for cooperation with a release pawl (39) of the switching device (10) and that the articulation point (32a) for the one bent lever arm (34) lies in the region of the angle.
10. Switch latch according to one of the claims 2 to 9, characterized thereby, that the drive lever (28, 29) displays an entraining pin (47) for action on the pawl lever (32) and a spring pin (48) for articulation of the at least one tension spring (38).
11. Switch latch according to one of the claims 2 to 10. characterised thereby, that the pins (27, 31) are beaded over or riveted at the protruding ends plugged through the metal bearing plates (21, 22).
12. Switch latch according to one of the claims 10 and 11, characterised thereby, that the spring pin (48) is laid into semicircular recesses at the outward side of the drive lever (28. 29) and provided with corresponding annular grooves.
13. Switch latch according to one of the claims 2 to 12, characterised thereby, that the drive lever (28, 29) displays lug-shaped projections (49) and outward throats (52) at the outward side in the region of the bearing pins (31) for the pawl lever (32) and is provided with inward throats (50) at the opposite inward side near the bearing pin (27).
14. Switch latch according to one of the claims 2 to 13, characterised thereby, that the hinge pin (36), which connects both the lever arms (34, 35) of the bent lever (33), is slidingly guided at both its ends in equally shaped recesses (26) of the metal bearing plates (21, 22).
15. Switch latch according to claim 14, characterised thereby, that the recesses (26) are provided with concavities (26a, 26b, 26c) for the detenting reception of the ends of the hinge pin (36).
16. Switch latch according to one of the claims 2 to 15, characterised thereby, that it is integrated into a pole path of a switching device, wherein in the switch latch (20) is detented by its mounting webs (23, 24) in precisely fitting receptables (46) of the switching device housing (11), is fastened in the region of the mounting bridge (25) at parts fast with the housing by way of fastening means (45), is secured against transverse displacement by laterally bearing housing parts and is coupled by way of its bent lever (33, 35) with the movable contact member (17).
17. Switch latch according to the claims 15 and 16, characterised thereby, that the one bent lever arm (35) is articulated at a switching shaft (37) of the switching device (10) and the pawl lever (32) is constructed for interlocking with a tripping device (15) of the switching device (10), that each recess (26) displays two concavities (26a, b), which serve for the limitation of the movement of the hinge pin (36) for the switching-on setting and the switching-off setting, and that a further concavity (26c) is provided, which when the pawl lever (32) is disengaged serves for the limitation of the movement of the hinge pin (36) in this released setting.
18. Switch latch according to claim 16 or 17. characterised thereby, that the two-armed drive lever (28, 29) displays an inclined surface (28c. 29c), which is arranged at the short lever arm (28b, 29b) and which - when the contacts (14. 17) are welded together and on a movement of the drive lever (28, 29) into the off-setting - cooperates with a projection (41) of the switching shaft (37) in the sense of an opening of the movable contact member (17).
19. Switching device according to claim 18, characterised thereby, that the projection is a shaped-on portion (Fig. 6 : 51) consisting of one piece with the switching shaft (37).
20. Switch latch for a switching device according to one of the claims 2 to 19, characterised thereby, that the free end of the other lever arm (35) is pushed by an elongate hole (53) onto a coupling pin (54) of the switching shaft (37) and force-lockingly held in the engaged position by a resilient element (55).
21. Switch latch according to claim 20, characterised thereby, that the elongate hole (53) of the lever arm (35) is provided with an undercut.
22. Switch latch according to claim 20, characterised thereby, that the resilient element is a leaf spring (55, 55'), which gives way on the introduction of the lever arm (35) and - after production of the connection between the lever arm (35) and the switching shaft (37) - presses the lever arm (35) against the coupling pin (54).
23. Switch latch according to claim 20, characterised thereby, that the coupling pin (54) is a pin by which a movable contact member (17) of the switching device (10) is inserted into an open groove (elongate hole 56) of the switching shaft (37) and retained falling-out by a tension spring (57).
EP85903288A 1984-07-14 1985-07-12 Switch latch Expired EP0188482B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19843425996 DE3425996A1 (en) 1984-07-14 1984-07-14 Latching mechanism for a switching apparatus
DE3425996 1984-07-14
DE19843439243 DE3439243A1 (en) 1984-10-26 1984-10-26 Switch lock
DE3439243 1984-10-26

Publications (2)

Publication Number Publication Date
EP0188482A1 EP0188482A1 (en) 1986-07-30
EP0188482B1 true EP0188482B1 (en) 1989-03-15

Family

ID=25822950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85903288A Expired EP0188482B1 (en) 1984-07-14 1985-07-12 Switch latch

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US (1) US4825183A (en)
EP (1) EP0188482B1 (en)
DE (1) DE3568906D1 (en)
WO (1) WO1986000751A1 (en)

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US4913503A (en) * 1988-10-07 1990-04-03 General Electric Company Molded case circuit breaker actuator-accessory unit reset mechanism
US5021819A (en) * 1990-08-06 1991-06-04 General Electric Company Circuit breaker with positive over-center acceleration
DE19637678A1 (en) * 1996-09-05 1998-03-12 Siemens Ag Low voltage circuit breaker with a drive device
DE19919420A1 (en) * 1999-04-28 2000-11-02 Siemens Ag Circuit breaker, for example circuit breaker
ATE357734T1 (en) * 1999-10-26 2007-04-15 Bticino Spa ACTUATING MECHANISM OF A MOVING CONTACT FOR ELECTRICAL CIRCUIT BREAKER
US8542083B2 (en) * 2011-09-23 2013-09-24 Eaton Corporation Collapsible mechanism for circuit breakers

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Also Published As

Publication number Publication date
US4825183A (en) 1989-04-25
EP0188482A1 (en) 1986-07-30
WO1986000751A1 (en) 1986-01-30
DE3568906D1 (en) 1989-04-20

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