EP0038286B1 - Power drive for an electric switching device with elastic transmission of the driving power - Google Patents

Power drive for an electric switching device with elastic transmission of the driving power Download PDF

Info

Publication number
EP0038286B1
EP0038286B1 EP81730034A EP81730034A EP0038286B1 EP 0038286 B1 EP0038286 B1 EP 0038286B1 EP 81730034 A EP81730034 A EP 81730034A EP 81730034 A EP81730034 A EP 81730034A EP 0038286 B1 EP0038286 B1 EP 0038286B1
Authority
EP
European Patent Office
Prior art keywords
leaf spring
power drive
limbs
slide
shaped leaf
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
EP81730034A
Other languages
German (de)
French (fr)
Other versions
EP0038286A1 (en
Inventor
Gerd Dr. Kummerow
Werner Troebel
Bernhard Preuss
Reinhard Zeuke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT81730034T priority Critical patent/ATE10987T1/en
Publication of EP0038286A1 publication Critical patent/EP0038286A1/en
Application granted granted Critical
Publication of EP0038286B1 publication Critical patent/EP0038286B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/18968—Flexible connections

Definitions

  • the invention relates to a power drive for an electrical switching device with elastic transmission of the driving force to an actuating member, in particular an actuating handle, by means of two parallel bending springs which are attached to the latter transversely to the direction of movement of a carrier which overlaps the actuating member with an opening and is acted upon by the driving force.
  • a power drive of this type is known from FR-A-1 275 093.
  • the carrier is a pivoted lever on which two curved spring wire rods are attached. These rest on the actuator of the switching device and cause an elastic coupling.
  • the pivoting movement of the carrier the location of the force application on the actuating element changes in the course of the actuating process, as a result of which locally high stresses and canting forces occur.
  • the invention is based on the object of achieving a linear force application on the actuating member and of being able to implement different spring characteristics despite a reduction in the number of parts.
  • this object is achieved in a power drive of the type mentioned at the outset in that the carrier is designed as a slide and the spiral springs are in the form of a U-shaped leaf spring and that the crank pin of a crank arm which transmits the drive force engages between the legs of the spiral spring.
  • a slide allows linear interaction with the actuator, as is known per se (US-A-3 328 731).
  • This slide drive receives advantageous properties in connection with the U-shaped leaf spring, because it forms a space-saving, easy-to-assemble part and, depending on the mounting or fastening of its ends, also results in a different spring characteristic.
  • both legs act as independent leaf springs, which are supported at both ends.
  • Common attachment is nevertheless possible in that at least the end of one of the legs of the U-shaped leaf spring is angled and can be snapped into a pocket-like recess in the slide.
  • the advantages of arranging two parallel leaf springs also include the possibility of dimensioning the distance between the two leaf springs locally less than the diameter of the crank pin of the crank arm. At a desired point, the resistance to movement for the crank pin can be increased to such an extent that the motor driving it accelerates to a standstill.
  • both legs can also influence the spring characteristic.
  • both legs can also be brought together, i.e. a steeper spring characteristic is achieved.
  • the mounting body can e.g. be a cast body in which the ends of the legs are cast.
  • the leg ends can also be held in slots in the mounting body by a clamp fit. This can be compared to the forces occurring during operation of the power drive by a rivet, a pin, a screw or the like. maintained, which passes through the mounting body and the leg ends.
  • a reliable clamp fit can also be achieved in that displaceable material is arranged at the mouths of the slots of the mounting body on its side facing the crank pin when the leaf spring is inserted.
  • the easiest way to do this is to provide it in one piece with the mounting body as a narrowing of the slots.
  • FIG. 1 shows a top view of a motor drive for a low-voltage circuit breaker with a U-shaped leaf spring of a first embodiment.
  • FIG. 2 shows as an individual part a leaf spring that is shaped differently from FIG. 1.
  • FIG. 3 is another motor drive in section with a further embodiment of a leaf spring and its attachment.
  • FIG. 4 A view of the motor drive in the direction of arrow IV in FIG. 3 is shown in FIG. 4.
  • FIGS. 5 and 6 show two further embodiments of a mounting body shown in FIGS. 3 and 4.
  • the power drive shown in FIG. 1 is designed as a motor drive.
  • the motor drive 1 has a support plate 2 to which a motor gear unit 3 is attached.
  • a gear shaft 4 perpendicular to the support plate 2 carries a crank arm 5 with a crank pin 6.
  • a U-shaped leaf spring 11 is fastened, between the legs 12 and 13 of which the crank pin 6 of the crank arm 5 engages.
  • the slide 7 has an approximately rectangular basic shape and has side walls 14 and 15 for guiding on the front side of the circuit breaker.
  • the side wall 14 has an opening 16 with a subsequent pocket-like recess 17.
  • the opposite side wall 15 has a corresponding opening 20. This is provided for the passage of the closed end of the U-shaped leaf spring 11, while the leg ends of the leaf spring extend through the opening 16.
  • One leg has a rounded bent end 21, for which a correspondingly rounded abutment 22 is provided in the pocket-like recess 17.
  • the leaf spring 11 is first inserted with its closed end through the opening 20; then the leg ends are compressed so far that they can be inserted through the opening 16 into the pocket-like recess 17. When released, the curved end 21 lies against the correspondingly curved abutment 22. The leaf spring is thus connected to the slide 7 sufficiently firmly. An undesired loosening of the leaf spring 11 from the slide 7 can be avoided even with heavy use by a filler piece, which e.g. can be formed by a screw 23 which extends through a hole in the slide.
  • the openings 16 and 20 of the slider 7 act as supports for the legs 12 and 13 of the leaf spring 11, the bending line of each leg corresponding to that of a beam supported on both sides.
  • the leaf spring 24 in FIG. 2 is shaped similarly to the leaf spring 11 in FIG. 1 and accordingly has legs 25 and 26 and a bent end 27 for positive attachment.
  • the leg 25 of the leaf spring 24 is provided with a section 28 bent in the direction of the other leg 26, by means of which the distance between the legs is thus locally reduced.
  • the power drive also provided for a low-voltage circuit breaker according to FIGS. 3 and 4, like the power drive in FIG. 1, is designed as a motor drive 30.
  • the power drive in turn has a support plate 31 which is fastened to the circuit breaker 32 shown at a dash-dot line at a distance from the front side thereof.
  • a slide 33 made of sheet metal is guided on the side facing the front of the circuit breaker 32 in the direction of the double arrow 34 on tabs 38. With a window-like opening 35 and bends 39, the slide 33 engages over a cylindrical body 36 which is placed on the end of an actuating handle 37.
  • This operating handle is connected to a rocker arm of the circuit breaker 32, which can be pivoted about a rotary bearing for switching the circuit breaker 32 on and off.
  • a motor gear unit 42 is fastened on the support plate 31 by screws 40, the gear 43 of which has a shaft 44 which is perpendicular to the support plate 31 and thus to the front of the circuit breaker 32. With this a crank arm 45 is connected, which engages with a crank pin 46 between the legs 47 of a U-shaped leaf spring 50. Details of the leaf spring 50 are shown in FIG. 4, which shows the motor drive in a view in the direction of arrow IV in FIG. 3. It can be seen that the ends 51 of the legs 47 of the leaf spring 50 are fastened in a mounting body 52. The mounting body is in turn fastened to the slide 33 by means of two screws, rivets or molded rivets 53.
  • the mounting body 52 can e.g. be a cast body in which the leg ends are cast.
  • the mounting body can also be a slotted metal block in which the leaf spring is held with its leg ends 51 by clamping. This can be effected in that a narrowing due to material accumulations 57 is provided at the mouth 54 of slots 55 of an assembly body 56 shown as an individual part in FIG. 5. These are displaced or deformed when the leaf spring is inserted, as a result of which inevitable tolerances are rendered ineffective and in any case a tight fit of the leaf spring is achieved. In the direction of insertion of the leaf spring, a similar material accumulation 59 is mounted on the connecting web 58 of the mounting body 56 as a tolerance compensation in height.
  • a rivet or a screw 61 is shown in FIG. 6 for a mounting body 60 which passes through the mounting body and the leg ends of the leaf spring. But you can also use a roll pin and thereby achieve a secure mounting of the leaf spring with a certain relative movement of the leg ends relative to the walls of the slots of the mounting body.
  • the fastening of the leaf spring in a mounting body ensures that the two legs bend together when the drive force is transferred from the crank pin to the actuating handle of the circuit breaker and thus the spring characteristics add.
  • the bending line of the leaf spring is approximately S-shaped.

Landscapes

  • Breakers (AREA)
  • Push-Button Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Electronic Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Control Of Electric Motors In General (AREA)
  • Brushes (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

Disclosed is a power drive for electric switchgear in which the driving force is elastically transmitted to an actuating member, for example, a handle. Thereby, tolerance compensation is provided to allow the drive motor to run into the end positions of the drive. A bending-type spring is disclosed as an elastic power transmitting member which is arranged transversely to the direction of motion of a slide which transmits the driving force to the switchgear. The bending-type spring can be connected to the slide. The bending-type spring can be a leaf spring, and more particularly two parallel leaf springs. In the disclosed embodiments, the two parallel leaf springs are provided as a single U-shaped leaf spring having parallel legs. The U-shaped leaf spring can either be supported at both ends thereof in the slide or the legs can be fastened in a mounting body connected to the slide.

Description

Die Erfindung betrifft einen Kraftantrieb für ein elektrisches Schaltgerät mit elastischer Übertragung der Antriebskraft auf ein Betätigungsorgan, insbesondere einen Betätigungshandgriff, mittels zweier parallel angeordneter Biegefedern, die quer zur Bewegungsrichtung eines das Betätigungsorgan mit einer Öffnung übergreifenden und mit der Antriebskraft beaufschlagten Trägers an diesem angebracht sind.The invention relates to a power drive for an electrical switching device with elastic transmission of the driving force to an actuating member, in particular an actuating handle, by means of two parallel bending springs which are attached to the latter transversely to the direction of movement of a carrier which overlaps the actuating member with an opening and is acted upon by the driving force.

Ein Kraftantrieb dieser Art ist durch die FR-A-1 275 093 bekannt geworden. Der Träger ist hierbei ein schwenkbar gelagerter Hebel, an dem zwei gebogene Federdrahtstäbe angebracht sind. Diese liegen an dem Betätigungsorgan des Schaltgerätes an und bewirken eine elastische Kupplung. Infolge der Schwenkbewegung des Trägers wechselt dabei im Laufe des Betätigungsvorganges die Stelle des Kraftangriffes an dem Betätigungsorgan, wodurch örtlich hohe Beanspruchungen und Verkantungskräfte auftreten. Der Erfindung liegt in diesem Zusammenhang die Aufgabe zugrunde, einen linienhaften Kraftangriff an dem Betätigungsorgan zu erreichen und trotz einer Verringerung der Anzahl von Teilen unterschiedliche Federkennlinien verwirklichen zu können.A power drive of this type is known from FR-A-1 275 093. The carrier is a pivoted lever on which two curved spring wire rods are attached. These rest on the actuator of the switching device and cause an elastic coupling. As a result of the pivoting movement of the carrier, the location of the force application on the actuating element changes in the course of the actuating process, as a result of which locally high stresses and canting forces occur. In this context, the invention is based on the object of achieving a linear force application on the actuating member and of being able to implement different spring characteristics despite a reduction in the number of parts.

Gemäss der Erfindung wird diese Aufgabe bei einem Kraftantrieb der eingangs genannten Art dadurch gelöst, dass der Träger als Schieber und die Biegefedern als U-förmige Blattfeder ausgebildet sind und dass zwischen die Schenkel der Biegefeder der Kurbelzapfen eines die Antriebskraft übertragenden Kurbelarmes eingreift. Ein Schieber gestattet ohne weiteres ein linienhaftes Zusammenwirken mit dem Betätigungsorgan, wie dies an sich bekannt ist (US-A-3 328 731). Vorteilhafte Eigenschaften erhält dieser Schieberantrieb in Verbindung mit der U-förmigen Blattfeder, weil diese ein raumsparend unterzubringendes und leicht montierbares Teil bildet und darüber hinaus je nach Lagerung bzw. Befestigung ihrer Enden eine unterschiedliche Federcharakteristik ergibt.According to the invention, this object is achieved in a power drive of the type mentioned at the outset in that the carrier is designed as a slide and the spiral springs are in the form of a U-shaped leaf spring and that the crank pin of a crank arm which transmits the drive force engages between the legs of the spiral spring. A slide allows linear interaction with the actuator, as is known per se (US-A-3 328 731). This slide drive receives advantageous properties in connection with the U-shaped leaf spring, because it forms a space-saving, easy-to-assemble part and, depending on the mounting or fastening of its ends, also results in a different spring characteristic.

Es ist auch eine Anordnung zur elastischen Kupplung des Betätigungsorgan eines Schaltgerätes mit einem äusseren Antriebsorgan bekanntgeworden (DE-U-7 018 079), die eine Biegefeder und einen Kurbelarm aufweist. Hierbei verbindet die Biegefeder unmittelbar das Antriebsorgan und das Betätigungsorgan des Schaltgerätes, was mit Verkantungskräften verbunden ist. Diese Anordnung eignet sich nur für Handbetätigung und kurze Betätigungshübe.An arrangement for the elastic coupling of the actuating element of a switching device with an external drive element has also become known (DE-U-7 018 079), which has a spiral spring and a crank arm. Here, the spiral spring directly connects the drive member and the actuating member of the switching device, which is associated with tilting forces. This arrangement is only suitable for manual operation and short actuation strokes.

Wie bereits erwähnt, können unterschiedliche Federkennlinien mit ein und derselben U-förmigen Blattfeder verwirklicht werden.As already mentioned, different spring characteristics can be realized with one and the same U-shaped leaf spring.

Wird z.B. die Anordnung so getroffen, dass die Enden der beiden Schenkel der U-förmigen Blattfeder an Lagerstellen im Schieber abgestützt sind, so wirken beide Schenkel als unabhängige Blattfedern, die an beiden Enden gestützt sind. Eine gemeinsame Befestigung ist dennoch dadurch möglich, dass wenigstens das Ende eines der Schenkel der U-förmigen Blattfeder abgewinkelt ausgebildet und in eine taschenartige Ausnehmung des Schiebers einrastbar ist.E.g. the arrangement is such that the ends of the two legs of the U-shaped leaf spring are supported at bearing points in the slide, both legs act as independent leaf springs, which are supported at both ends. Common attachment is nevertheless possible in that at least the end of one of the legs of the U-shaped leaf spring is angled and can be snapped into a pocket-like recess in the slide.

Für die Aufrechterhaltung dieser formschlüssigen Verbindung auch bei starker Beanspruchung kann durch einen Stützkörper gesorgt werden, der zwischen die Schenkel eingefügt ist.To maintain this positive connection even with heavy use can be ensured by a support body which is inserted between the legs.

Zu den Vorteilen der Anordnung zweier paralleler Blattfedern gehört ferner die Möglichkeit, den Abstand beider Blattfedern örtlich geringer als den Durchmesser des Kurbelzapfens des Kurbelarmes zu bemessen. An einer gewünschten Stelle kann dadurch der Bewegungswiderstand für den Kurbelzapfen so weit erhöht werden, dass der ihn antreibende Motor beschleunigt zum Stillstand kommt.The advantages of arranging two parallel leaf springs also include the possibility of dimensioning the distance between the two leaf springs locally less than the diameter of the crank pin of the crank arm. At a desired point, the resistance to movement for the crank pin can be increased to such an extent that the motor driving it accelerates to a standstill.

Wie bereits erwähnt, lässt sich durch die Anordnung von zwei parallelen Blattfedern, die durch die Schenkel einer U-förmigen Blattfeder gebildet sind, auch die Federkennlinie beeinflussen. Im Unterschied zu der schon beschriebenen unabhängigen Wirkung beider Federschenkel können auch beide Schenkel gemeinsam zur Wirkung gebracht werden, d.h. es wird eine steilere Federkennlinie erzielt. Dies kann dadurch geschehen, dass die Enden der Schenkel der U-förmigen Blattfeder in einem Montagekörper befestigt sind. Der Montagekörper kann z.B. ein Gusskörper sein, in den die Enden der Schenkel eingegossen sind. Die Schenkelenden können aber auch in Schlitzen des Montagekörpers durch einen Klemmsitz gehalten sein. Dieser lässt sich gegenüber den im Betrieb des Kraftantriebes auftretenden Kräften durch einen Niet, einen Stift, eine Schraube od.dgl. aufrechterhalten, der bzw. die den Montagekörper und die Schenkelenden durchsetzt.As already mentioned, the arrangement of two parallel leaf springs, which are formed by the legs of a U-shaped leaf spring, can also influence the spring characteristic. In contrast to the already described independent effect of both spring legs, both legs can also be brought together, i.e. a steeper spring characteristic is achieved. This can be done in that the ends of the legs of the U-shaped leaf spring are fastened in a mounting body. The mounting body can e.g. be a cast body in which the ends of the legs are cast. The leg ends can also be held in slots in the mounting body by a clamp fit. This can be compared to the forces occurring during operation of the power drive by a rivet, a pin, a screw or the like. maintained, which passes through the mounting body and the leg ends.

Ein zuverlässiger Klemmsitz kann aber auch dadurch erreicht werden, dass an den Mündungen der Schlitze des Montagekörpers an ihrer dem Kurbelzapfen zugewandten Seite beim Einsetzen der Blattfeder verdrängbares Material angeordnet ist. Dieses kann am einfachsten einstückig mit dem Montagekörper als Verengung der Schlitze vorgesehen sein. Beim Einsetzen der Blattfeder in die Schlitze wird die Materialanhäufung verformt bzw. verdrängt, wodurch unabhängig von unvermeidbaren Toleranzen eine feste Einspannung der Blattfeder erzielt wird.However, a reliable clamp fit can also be achieved in that displaceable material is arranged at the mouths of the slots of the mounting body on its side facing the crank pin when the leaf spring is inserted. The easiest way to do this is to provide it in one piece with the mounting body as a narrowing of the slots. When the leaf spring is inserted into the slots, the material accumulation is deformed or displaced, as a result of which the leaf spring is firmly clamped regardless of inevitable tolerances.

Die Erfindung wird in folgenden anhand der in den Figuren dargestellten Ausführungsbeispiele näher erläutert.The invention is explained in more detail below with reference to the exemplary embodiments shown in the figures.

Die Fig. 1 zeigt in einer Draufsicht einen Motorantrieb für einen Niederspannungs-Schutzschalter mit einer U-förmigen Blattfeder einer ersten Ausführungsform.1 shows a top view of a motor drive for a low-voltage circuit breaker with a U-shaped leaf spring of a first embodiment.

Die Fig. 2 zeigt als Einzelteil eine gegenüber der Fig. 1 abweichend geformte Blattfeder.FIG. 2 shows as an individual part a leaf spring that is shaped differently from FIG. 1.

In der Fig. 3 ist im Schnitt ein anderer Motorantrieb mit einer weiteren Ausführungsform einer Blattfeder und ihrer Befestigung.3 is another motor drive in section with a further embodiment of a leaf spring and its attachment.

Eine Ansicht des Motorantriebes in Richtung des Pfeiles IV in Fig. 3 zeigt die Fig. 4.A view of the motor drive in the direction of arrow IV in FIG. 3 is shown in FIG. 4.

Zwei weitere Ausführungsformen eines in den Fig. 3 und 4 gezeigten Montagekörpers zeigen die Fig. 5 und 6.FIGS. 5 and 6 show two further embodiments of a mounting body shown in FIGS. 3 and 4.

Der in der Fig. 1 dargestellte Kraftantrieb ist als Motorantrieb ausgebildet. Der Motorantrieb 1 weist eine Tragplatte 2 auf, an der eine Motorgetriebeeinheit 3 befestigt ist. Eine senkrecht zu der Tragplatte 2 stehende Getriebewelle 4 trägt einen Kurbelarm 5 mit einem Kurbelzapfen 6. Unterhalb der Tragplatte 2 und daher im Zwischenraum zwischen dieser und der Frontseite eines nicht dargestellten Niederspannungs-Schutzschalters, z.B. eines Schalters der Kompaktbauart, befindet sich ein Schieber 7, der eine fensterartige Öffnung 10 zum Durchtritt eines Betätigungshandgriffes 8 des erwähnten Schutzschalters besitzt. In dem Schieber 7 ist eine U-förmige Blattfeder 11 befestigt, zwischen deren Schenkel 12 und 13 der Kurbelzapfen 6 des Kurbelarmes 5 eingreift.The power drive shown in FIG. 1 is designed as a motor drive. The motor drive 1 has a support plate 2 to which a motor gear unit 3 is attached. A gear shaft 4 perpendicular to the support plate 2 carries a crank arm 5 with a crank pin 6. Below the support plate 2 and therefore in the space between it and the front of a low-voltage circuit breaker, not shown, e.g. a switch of the compact type, there is a slide 7, which has a window-like opening 10 for the passage of an operating handle 8 of the circuit breaker mentioned. In the slide 7, a U-shaped leaf spring 11 is fastened, between the legs 12 and 13 of which the crank pin 6 of the crank arm 5 engages.

Wie man erkennt, weist der Schieber 7 eine etwa rechteckige Grundform auf und besitzt zur Führung auf der Frontseite des Schutzschalters Seitenwände 14 und 15. Die Seitenwand 14 weist eine Öffnung 16 mit einer anschliessenden taschenartigen Ausnehmung 17 auf. Ferner besitzt die gegenüberliegende Seitenwand 15 eine entsprechende Öffnung 20. Diese ist zum Durchtritt des geschlossenen Endes der U-förmigen Blattfeder 11 vorgesehen, während sich durch die Öffnung 16 die Schenkelenden der Blattfeder erstrekken. Der eine Schenkel besitzt ein abgerundet gebogenes Ende 21, für das in der taschenartigen Ausnehmung 17 ein entsprechend abgerundetes Widerlager 22 vorgesehen ist.As can be seen, the slide 7 has an approximately rectangular basic shape and has side walls 14 and 15 for guiding on the front side of the circuit breaker. The side wall 14 has an opening 16 with a subsequent pocket-like recess 17. Furthermore, the opposite side wall 15 has a corresponding opening 20. This is provided for the passage of the closed end of the U-shaped leaf spring 11, while the leg ends of the leaf spring extend through the opening 16. One leg has a rounded bent end 21, for which a correspondingly rounded abutment 22 is provided in the pocket-like recess 17.

Zur Montage wird die Blattfeder 11 zunächst mit ihrem geschlossenen Ende durch die Öffnung 20 hindurchgesteckt; dann werden die Schenkelenden so weit zusammengedrückt, dass sie sich durch die Öffnung 16 in die taschenartige Ausnehmung 17 einführen lassen. Beim Loslassen legt sich das gebogene Ende 21 gegen das entsprechend gebogene Widerlager 22. Damit ist die Blattfeder ausreichend fest mit dem Schieber 7 verbunden. Ein unerwünschtes Lösen der Blattfeder 11 von dem Schieber 7 kann auch bei starker Beanspruchung durch ein Füllstück vermieden werden, das z.B. durch eine Schraube 23 gebildet sein kann, die sich durch ein Loch des Schiebers erstreckt. Die Öffnungen 16 und 20 des Schiebers 7 wirken als Auflager für die Schenkel 12 und 13 der Blattfeder 11, wobei die Biegelinie jedes Schenkels für sich derjenigen eines beidseitig abgestützen Balkens entspricht.For assembly, the leaf spring 11 is first inserted with its closed end through the opening 20; then the leg ends are compressed so far that they can be inserted through the opening 16 into the pocket-like recess 17. When released, the curved end 21 lies against the correspondingly curved abutment 22. The leaf spring is thus connected to the slide 7 sufficiently firmly. An undesired loosening of the leaf spring 11 from the slide 7 can be avoided even with heavy use by a filler piece, which e.g. can be formed by a screw 23 which extends through a hole in the slide. The openings 16 and 20 of the slider 7 act as supports for the legs 12 and 13 of the leaf spring 11, the bending line of each leg corresponding to that of a beam supported on both sides.

Die Blattfeder 24 in Fig. 2 ist ähnlich wie die Blattfeder 11 in Fig. 1 geformt und besitzt dementsprechend Schenkel 25 und 26 sowie ein abgebogenes Ende 27 zur formschlüssigen Befestigung. Ausserdem ist der Schenkel 25 der Blattfeder 24 mit einem in Richtung des anderen Schenkels 26 gebogenen Abschnitt 28 versehen, durch den der Abstand der Schenkel somit örtlich verringert ist. Beim Durchlaufen des Kurbelzapfens 6 (Fig. 1) tritt daher eine zusätzliche Biegung der Schenkel 25 und 26 auf, durch die eine erwünschte Klemmwirkung auf die Kurbel 5 und damit den nicht gezeigten Motor des Kraftantriebes ausgeübt wird.The leaf spring 24 in FIG. 2 is shaped similarly to the leaf spring 11 in FIG. 1 and accordingly has legs 25 and 26 and a bent end 27 for positive attachment. In addition, the leg 25 of the leaf spring 24 is provided with a section 28 bent in the direction of the other leg 26, by means of which the distance between the legs is thus locally reduced. When passing through the crank pin 6 (FIG. 1), there is therefore an additional bending of the legs 25 and 26, through which a desired clamping effect is exerted on the crank 5 and thus the motor of the power drive, not shown.

Der gleichfalls für einen Niederspannungs-Schutzschalter vorgesehene Kraftantrieb gemäss den Fig. 3 und 4 ist wie der Kraftantrieb in Fig. 1 als Motorantrieb 30 ausgebildet. Der Kraftantrieb besitzt wiederum eine Tragplatte 31, die mit Abstand von der Frontseite eines strichpunktiert gezeigten Schutzschalters 32 an diesem befestigt ist. Ein aus Blech bestehender Schieber 33 ist an der der Frontseite des Schutzschalters 32 zugewandten Seite in Richtung des Doppelpfeiles 34 an Lappen 38 verschiebbar geführt. Mit einer fensterartigen Öffnung 35 und Abwinklungen 39 übergreift der Schieber 33 einen zylindrischen Körper 36, der auf das Ende eines Betätigungshandgriffes 37 aufgesetzt ist. Dieser Betätigungshandgriff ist mit einem Kipphebel des Schutzschalters 32 verbunden, der um ein Drehlager zum Ein- und Ausschalten des Schutzschalters 32 schwenkbar ist.The power drive also provided for a low-voltage circuit breaker according to FIGS. 3 and 4, like the power drive in FIG. 1, is designed as a motor drive 30. The power drive in turn has a support plate 31 which is fastened to the circuit breaker 32 shown at a dash-dot line at a distance from the front side thereof. A slide 33 made of sheet metal is guided on the side facing the front of the circuit breaker 32 in the direction of the double arrow 34 on tabs 38. With a window-like opening 35 and bends 39, the slide 33 engages over a cylindrical body 36 which is placed on the end of an actuating handle 37. This operating handle is connected to a rocker arm of the circuit breaker 32, which can be pivoted about a rotary bearing for switching the circuit breaker 32 on and off.

Auf der Tragplatte 31 ist durch Schrauben 40 eine Motorgetriebeeinheit 42 befestigt, deren Getriebe 43 eine senkrecht zu der Tragplatte 31 und damit zu der Frontseite des Schutzschalters 32 stehende Welle 44 besitzt. Mit dieser ist ein Kurbelarm 45 verbunden, der mit einem Kurbelzapfen 46 zwischen die Schenkel 47 einer U-förmigen Blattfeder 50 eingreift. Einzelheiten der Blattfeder 50 sind der Fig. 4 zu entnehmen, die den Motorantrieb in einer Ansicht in Richtung des Pfeiles IV in der Fig. 3 zeigt. Dabei ist zu erkennen, dass die Enden 51 der Schenkel 47 der Blattfeder 50 in einem Montagekörper 52 befestigt sind. Der Montagekörper ist seinerseits mittels zweier Schrauben, Niete oder angeformter Nietzapfen 53 an dem Schieber 33 befestigt. Der Montagekörper 52 kann z.B. ein Gusskörper sein, in den die Schenkelenden eingegossen sind. Jedoch kann der Montagekörper auch ein mit Schlitzen versehener Metallklotz sein, in dem die Blattfeder mit ihren Schenkelenden 51 durch Klemmung gehalten ist. Diese kann dadurch bewirkt sein, dass an der Mündung 54 von Schlitzen 55 eines in der Fig. 5 als Einzelteil gezeigten Montagekörpers 56 eine Verengung durch Materialanhäufungen 57 vorgesehen ist. Diese werden beim Einsetzen der Blattfeder verdrängt bzw. verformt, wodurch unvermeidliche Toleranzen unwirksam gemacht und in jedem Fall ein fester Sitz der Blattfeder erzielt wird. In Einschubrichtung der Blattfeder ist auf dem Verbindungssteg 58 des Montagekörpers 56 eine gleichartige Materialanhäufung 59 als Toleranzausgleich in der Höhe angebracht.A motor gear unit 42 is fastened on the support plate 31 by screws 40, the gear 43 of which has a shaft 44 which is perpendicular to the support plate 31 and thus to the front of the circuit breaker 32. With this a crank arm 45 is connected, which engages with a crank pin 46 between the legs 47 of a U-shaped leaf spring 50. Details of the leaf spring 50 are shown in FIG. 4, which shows the motor drive in a view in the direction of arrow IV in FIG. 3. It can be seen that the ends 51 of the legs 47 of the leaf spring 50 are fastened in a mounting body 52. The mounting body is in turn fastened to the slide 33 by means of two screws, rivets or molded rivets 53. The mounting body 52 can e.g. be a cast body in which the leg ends are cast. However, the mounting body can also be a slotted metal block in which the leaf spring is held with its leg ends 51 by clamping. This can be effected in that a narrowing due to material accumulations 57 is provided at the mouth 54 of slots 55 of an assembly body 56 shown as an individual part in FIG. 5. These are displaced or deformed when the leaf spring is inserted, as a result of which inevitable tolerances are rendered ineffective and in any case a tight fit of the leaf spring is achieved. In the direction of insertion of the leaf spring, a similar material accumulation 59 is mounted on the connecting web 58 of the mounting body 56 as a tolerance compensation in height.

Als weiteres Mittel zur Erzielung eines festen Klemmsitzes der U-förmigen Blattfeder ist in der Fig. 6 bei einem Montagekörper 60 ein Niet oder eine Schraube 61 gezeigt, der bzw. die den Montagekörper und die Schenkelenden der Blattfeder durchsetzt. Man kann aber auch einen Spannstift verwenden und dadurch eine sichere Halterung der Blattfeder mit einer gewissen Relativbewegung der Schenkelenden gegenüber den Wandungen der Schlitze des Montagekörpers erreichen.As a further means of achieving a firm clamping fit of the U-shaped leaf spring, a rivet or a screw 61 is shown in FIG. 6 for a mounting body 60 which passes through the mounting body and the leg ends of the leaf spring. But you can also use a roll pin and thereby achieve a secure mounting of the leaf spring with a certain relative movement of the leg ends relative to the walls of the slots of the mounting body.

In jedem Fall wird durch die Befestigung der Blattfeder in einem Montagekörper erreicht, dass sich die beiden Schenkel bei der Übertragung der Antriebskraft von dem Kurbelzapfen auf den Betätigungshandgriff des Schutzschalters gemeinsam durchbiegen und sich somit die Federkennlinien addieren. Die Biegelinie der Blattfeder ist dabei etwa S-förmig.In any case, the fastening of the leaf spring in a mounting body ensures that the two legs bend together when the drive force is transferred from the crank pin to the actuating handle of the circuit breaker and thus the spring characteristics add. The bending line of the leaf spring is approximately S-shaped.

Claims (9)

1. A power drive (30) for an electrical switching device (32) with elastic transmission of the driving power to an operating member, in particular an operating handle (37), by means of two parallel bent springs which are arranged on a carrier transversely to the direction of motion of the carrier which engages over the operating element (37) by means of an opening (35) and is supplied with the driving power, characterised in that the carrier is formed as a slide (7; 33) and the bent springs are designed as U-shaped leaf springs (11; 24; 50); and that the crank pin (6; 46) of a crank arm (5; 45), which transmits the driving power, engages between the limbs (12, 13; 25, 26) of the leaf spring (11; 24).
2. A power drive as claimed in Claim 1, characterised in that the ends of the two limbs (12, 13) of the U-shaped leaf spring (11) are supported on bearing points (16, 20) in the slide (7).
3. A power drive as claimed in Claim 2, characterised in that, at least the end (21) of one of the limbs of the U-shaped leaf spring (11) is angled and can engage into a pocket-like recess (17) in the slide (7) in form-locking fashion.
4. A power drive as claimed in Claim 1, characterised in that a supporting body (screw 23) is inserted between the ends of the two limbs (12, 13) of the U-shaped leaf spring (11).
5. A power drive as claimed in Claim 1, characterised in that the distance apart of the two limbs (25, 26) of the leaf spring (24) is locally smaller (section 28) than the diameter of the crank pin (6) of the crank arm (5).
6. A power drive as claimed in Claim 1, characterised in that the ends (51) of the limbs (47) of the U-shaped leaf spring (50) are secured in an assembly body (52; 56; 60).
7. A power drive as claimed in Claim 6, characterised in that the assembly body (52) is a cast body into which the ends (51) of the limbs (47) are cast.
8. A power drive as claimed in Claim 6, characterised in that the ends (51) of the limbs (47) are secured in slots (55) in the assembly body (56) by a clamping fit.
9. A power drive as claimed in Claim 8, characterised in that material (57, 59), which can be displaced when inserting the leaf spring (50), is arranged at the openings (54) of the slots (55) of the assembly body (56) and on the connecting bridge (58) thereof on the side of the openings and the side of the connecting bridge which faces the crank pin (46).
EP81730034A 1980-04-15 1981-03-19 Power drive for an electric switching device with elastic transmission of the driving power Expired EP0038286B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81730034T ATE10987T1 (en) 1980-04-15 1981-03-19 POWER DRIVE FOR AN ELECTRICAL SWITCHING DEVICE WITH ELASTIC TRANSMISSION OF THE DRIVING FORCE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3014825A DE3014825C2 (en) 1980-04-15 1980-04-15 Power drive for electrical switching devices with elastic transmission of the drive force
DE3014825 1980-04-15

Publications (2)

Publication Number Publication Date
EP0038286A1 EP0038286A1 (en) 1981-10-21
EP0038286B1 true EP0038286B1 (en) 1984-12-27

Family

ID=6100321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81730034A Expired EP0038286B1 (en) 1980-04-15 1981-03-19 Power drive for an electric switching device with elastic transmission of the driving power

Country Status (8)

Country Link
US (1) US4468977A (en)
EP (1) EP0038286B1 (en)
JP (1) JPS5734617A (en)
AT (1) ATE10987T1 (en)
BR (1) BR8102278A (en)
CA (1) CA1161888A (en)
DE (1) DE3014825C2 (en)
MX (1) MX149505A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3045568C2 (en) * 1980-11-28 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Motor drive for low-voltage circuit breakers
DE4142854A1 (en) * 1991-12-20 1993-06-24 Siemens Ag POWER DRIVE FOR ELECTRICAL SWITCHGEAR WITH AN OPERATING HANDLE
FR2750791B1 (en) * 1996-07-02 1998-10-09 Schneider Electric Sa ELECTRIC MAGNET LOCKABLE SAFETY SWITCH
FR2770335B1 (en) * 1997-10-28 1999-12-31 Michel Bensadoun RESETTING DEVICE FOR CIRCUIT BREAKER, PARTICULARLY FOR DIFFERENTIAL CIRCUIT BREAKER

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1428821A (en) * 1920-09-06 1922-09-12 Giqtje electriqtre
FR26193E (en) * 1921-12-17 1923-09-05 Metallurg Electr Ultra-fast circuit breaker
US2180561A (en) * 1938-11-21 1939-11-21 William H N Stevens Combined canteen, cooking, and mess kit
US2237530A (en) * 1938-11-23 1941-04-08 Crouse Hinds Co Switch actuating mechanism
ES260872A1 (en) * 1959-10-22 1961-12-16 Westinghouse Electric Corp Electric circuit breaker operating mechanism
US3213234A (en) * 1962-06-11 1965-10-19 Westinghouse Electric Corp Mechanism comprising variable-friction drive means for operating circuit interrupters
NL300256A (en) * 1962-11-08
US3213235A (en) * 1962-11-27 1965-10-19 Westinghouse Electric Corp Friction-clutch type mechanism for operating circuit interrupters
US3328731A (en) * 1965-06-14 1967-06-27 Huska Paul Combined electrical circuit breaker and actuator
US3551921A (en) * 1968-06-28 1971-01-05 Sajar Plastics Inc Mechanical control for liquid drain stopper
US3590648A (en) * 1969-08-19 1971-07-06 De Witt Y Gorman Remote light-switching apparatus
DE7018079U (en) * 1970-05-14 1970-08-13 Bbc Brown Boveri & Cie COUPLING LINK BETWEEN A TAG AND A ROCKER ARM.

Also Published As

Publication number Publication date
MX149505A (en) 1983-11-15
EP0038286A1 (en) 1981-10-21
US4468977A (en) 1984-09-04
DE3014825A1 (en) 1981-10-22
CA1161888A (en) 1984-02-07
DE3014825C2 (en) 1982-10-21
BR8102278A (en) 1981-12-01
ATE10987T1 (en) 1985-01-15
JPS5734617A (en) 1982-02-25

Similar Documents

Publication Publication Date Title
DE3336207C2 (en) Electric switch with stop of the control lever when the contacts are welded together
DE3019149C2 (en) Screwless connector
EP3504756B1 (en) Terminal
EP0038286B1 (en) Power drive for an electric switching device with elastic transmission of the driving power
DE102006015815B3 (en) Magnetic drive for use in relay, has two side walls attached to yoke side pieces or to coil body of magnetic coil, and adjusting unit movably held between side walls, and armature pivotably supported in side walls
DE10148705A1 (en) Brush holder system for electrical drive, has brush holder plate with guide arrangement for guiding brushes or brush sections of flat springs with brushes in radial direction
DE102008039705B4 (en) Contact assembly for a relay, relay with contact assembly and method for mounting a relay
DE1806286C3 (en) Electromagnetic contactor
DE4319615C2 (en) Electrical switch for switching an electric motor, especially in an electric toothbrush
EP0170172B1 (en) Piezoelectric relay
DE2706988A1 (en) Bared wire ends connection system - has slider acting on V=shaped leaf spring which used to retain wire
AT409428B (en) ELECTRICAL INSTALLATION SWITCH
DE3633854A1 (en) SCREW TERMINAL
DE3014827C2 (en) Motor drive for low-voltage circuit breakers
EP0639846B1 (en) Switch spindle for an installation switch
WO1998012436A1 (en) Lock-in device for a straight moving building component
EP0091687A1 (en) Electromagnetic relay
DE3433621A1 (en) ELECTRIC CONTROLLER FOR A KNITTING MACHINE
DE102019112683B3 (en) Switching device with self-cleaning contacts
EP0369221B1 (en) Electrical switch for an electrical hand-held tool
DE4204465A1 (en) Ratcheted system for rotary switch - has different turning resistances within programs or switching steps, used e.g. for washing machine
DE69614554T2 (en) Device for controlling the flow of steam in household appliances using electrical steam
DE3030911A1 (en) Vehicle steering column mounted switch - has arm swung above spring-loaded contact strip to operate window washers and wiper
DE909948C (en) Relays for telecommunications, especially telephone systems
DE2504228C2 (en) Contact spring set for electromagnetic relays

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT FR GB IT

17P Request for examination filed

Effective date: 19820322

RBV Designated contracting states (corrected)

Designated state(s): AT FR GB IT

ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT FR GB IT

REF Corresponds to:

Ref document number: 10987

Country of ref document: AT

Date of ref document: 19850115

Kind code of ref document: T

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19860228

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19870319

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920323

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19931130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST