EP0374552A2 - Method for making an electromagnetic relay, and relay obtained thereby - Google Patents

Method for making an electromagnetic relay, and relay obtained thereby Download PDF

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Publication number
EP0374552A2
EP0374552A2 EP89122261A EP89122261A EP0374552A2 EP 0374552 A2 EP0374552 A2 EP 0374552A2 EP 89122261 A EP89122261 A EP 89122261A EP 89122261 A EP89122261 A EP 89122261A EP 0374552 A2 EP0374552 A2 EP 0374552A2
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EP
European Patent Office
Prior art keywords
yoke
projection
wall
core
relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89122261A
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German (de)
French (fr)
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EP0374552A3 (en
EP0374552B1 (en
Inventor
Hans Peter Stribel
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Stribel GmbH
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Stribel GmbH
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Publication of EP0374552A3 publication Critical patent/EP0374552A3/en
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Publication of EP0374552B1 publication Critical patent/EP0374552B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H2050/367—Methods for joining separate core and L-shaped yoke
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention relates to a method for producing an electromagnetic relay with the features of the preamble of claim 1 and a relay produced by the method.
  • the magnetic resistance in the magnetic circuit is as small as possible.
  • the magnetic resistance is often unsatisfactorily high, since the connection between the yoke and the coil core is inadequate and, in addition, is subject to considerable temperature and vibration stresses during relay operation.
  • the pole face of the coil core and the abutment for the relay armature are precisely matched to each other in order to keep the magnetic resistance small at this point.
  • the coil core is pressed into the wall of the yoke until the desired dimension is reached.
  • the object of the invention is to develop a method for producing a relay with the features of the preamble of claim 1 in such a way that a magnetically low-resistance, fixed yoke-core connection is achieved with simple means by adjusting the length of the core with little force.
  • An advantageous relay produced by the method is characterized by the features of claim 2.
  • the relay 1 can be installed on a printed circuit board 2, which can have conductor tracks (not shown here) on its lower and / or upper side.
  • the relay 1 has a yoke 3 made of a ferromagnetic material, which has a rear wall 4 and a leg 5 bent at right angles therefrom.
  • a core 7 is provided with a reduced diameter extension 6, which is also made of ferromagnetic material and is at a distance parallel to the leg 5 with its axis 8.
  • the core 7 carries a coil body 9 made of insulating material, which has an end plate 10 and a back plate 11 and carries a coil 12 wound from coil wire.
  • the relay 1 On the underside of the relay 1 can be provided on the yoke wall 4 formed mounting pin 13 and to the normally closed contacts 14, working contacts 15 and coil connecting parts 16 plug pins 17 are provided, which are arranged at a distance from one another in accordance with a hole pattern formed in the printed circuit board 2 are and can be inserted into the holes in the circuit board 2.
  • an upwardly projecting pin 18 can be formed, to which a helical tension spring 19 can be attached.
  • the other end of the coil spring 19 can be fastened to a web 20, which also protrudes upward, of a hinged anchor 21 which is also made of ferromagnetic material.
  • the hinged anchor 21 is pivotally mounted on an abutment 22 formed on the yoke leg 5.
  • a metal braid 23 can be attached, which is contacted with its other end on the hinged anchor 21.
  • a thin contact spring plate 24 can be provided, which can have one or more switching contacts 25 arranged between the normally closed contacts 14 and the working contacts 15.
  • a passage 26 can be formed on the rear wall 4 of the yoke 3, which can have a projection 28 projecting on the inside 27 of the yoke wall 4 and a recess 29 which is formed on the opposite outside 30 of the yoke wall 4 is.
  • the extension 6 of the core 7 can be inserted into the hole 31 determining the inside diameter of the passage 26, so that the core 7 comes to rest with a stop surface 32 on an annular surface 33 delimited by the outside diameter and the inside diameter of the projection 28.
  • the diameter of the core 7 and the outer diameter of the protrusion 28 may preferably be approximately the same.
  • the diameter of the coil core extension 6 expediently be the same or only slightly smaller than the diameter of the pull-through hole 31, so that the extension 6 can be inserted into the projection 28 largely without play during assembly.
  • the width of the circular ring surface 33 which is limited by the inner diameter and the outer diameter of the projection 28, so that it is approximately as wide as the thickness of the yoke wall 4.
  • the passage 26 formed in the yoke wall 4 can advantageously be designed such that the dimension of the rear recess 29 and the length of the projection 28 projecting beyond the yoke wall inside 27 are approximately the same in the axial direction.
  • the dimension of the recess 29 within the yoke wall 4 and / or the length of the projection 28 projecting on the inside 27 in the axial direction such that it is approximately equal to or greater than half the thickness of the yoke wall 4.
  • the axial length of the extension 6 can be somewhat larger than the distance between the bottom of the recess 29 and the annular surface 33, so that the extension 6 protrudes into the recess 29 of the passage 26.
  • the stop surface 32 of the coil core 7 is pressed firmly against the annular surface 33 of the protruding wall projection 28, in such a way that the wall projection 28 is pushed back towards the plane of the yoke wall 4, so that the core stop surface 32 and the annular surface 33 are approximately in or slightly in front of the plane of the inside 27 of the yoke wall 4, as shown in FIG. 3 is shown in the final assembly position.
  • the projection 28 has preferably been pushed back so far that the core pole surface 34 lies in the same plane as the abutment 22.
  • the from FIG. 2 apparent distance 37 between the plane of the abutment 22 and the plane of the pole face 34 is in the preferred embodiment shown in FIG. 1 and 3 no longer, but has essentially been reduced to zero.
  • An advantage of the manufacturing method according to the invention and the relay manufactured according to it is that the core 7 can be connected extremely dimensionally and permanently firmly to the yoke wall 4, wherein there is also a large-area material bond in the connection area of the two parts, so that a small magnetic contact resistance high magnetic force flux can be achieved.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

During the production of an electromagnetic relay having a yoke and a core, for fastening and fine adjustment, the core is pressed axially against a protruding yoke wall projection and the wall projection is pressed back towards the plane of the yoke wall. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines elektromagnetischen Relais mit den Merkmalen des Oberbegriffs des Anspruchs 1 und ein nach dem Verfahren hergestelltes Relais.The invention relates to a method for producing an electromagnetic relay with the features of the preamble of claim 1 and a relay produced by the method.

Bei elektromagnetischen Relais dieser Art ist es von wesentlicher Bedeutung, daß der magnetische Widerstand im Magnetkreis so klein wie möglich ist. Insbesondere bei Kleinrelais ist der magnetische Widerstand oftmals unbefriedigend hoch, da die Verbindung zwischen Joch und Spulenkern unzulänglich ist und zusätzlich während des Re­laisbetriebs erheblichen Temperatur- und Schwingungsbean­spruchungen unterliegt. Außerdem ist es wichtig, daß die Polfläche des Spulenkerns und das Widerlager für den Relaisanker genau aufeinander abgestimmt sind, um auch an dieser Stelle den magnetischen Widerstand klein zu halten. Um dies zu erreichen, wird bei einem bekann­ten Relais der Spulenkern in die Wand des Jochs so weit hineingedrückt, bis das gewünschte Maß erreicht ist.With electromagnetic relays of this type, it is essential that the magnetic resistance in the magnetic circuit is as small as possible. In the case of small relays in particular, the magnetic resistance is often unsatisfactorily high, since the connection between the yoke and the coil core is inadequate and, in addition, is subject to considerable temperature and vibration stresses during relay operation. It is also important that the pole face of the coil core and the abutment for the relay armature are precisely matched to each other in order to keep the magnetic resistance small at this point. In order to achieve this, in a known relay the coil core is pressed into the wall of the yoke until the desired dimension is reached.

Hierbei ist es nachteilig, daß beim Hineindrücken des Kerns in die Jochwand verhältnismäßig große Kräfte aufgebracht werden müssen, damit das den Spulenkern im Befestigungsbereich umgebende Jochmaterial fließt. Ein weiterer Nachteil besteht darin, daß für diese Verbin­dung der Spulenkern aus einem harten Werk­stoff hergestellt sein muß, der spanlos nicht bear­beitbar oder verformbar ist, so daß der Kern nicht ver­bogen werden kann, weshalb das bekannte Relais ver­hältnismäßig aufwendig ist.It is disadvantageous here that when the core is pressed into the yoke wall, relatively large forces have to be applied so that the yoke material surrounding the coil core in the fastening area flows. Another disadvantage is that for this connection the coil core must be made of a hard material that is not machinable or deformable so that the core cannot be bent, which is why the known relay is relatively expensive.

Die Aufgabe der Erfindung besteht darin, ein Verfahren zur Herstellung eines Relais mit den Merkmalen des Oberbegriffs des Anspruchs 1 dahingehend weiterzubilden, daß mit einfachen Mitteln eine magnetisch widerstandsarme, feste Joch-Kern-Verbindung durch Längenjustierung des Kerns mit geringer Kraft erzielt wird.The object of the invention is to develop a method for producing a relay with the features of the preamble of claim 1 in such a way that a magnetically low-resistance, fixed yoke-core connection is achieved with simple means by adjusting the length of the core with little force.

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

Ein nach dem Verfahren hergestelltes vorteilhaftes Re­lais ist durch die Merkmale des Anspruchs 2 gekenn­zeichnet.An advantageous relay produced by the method is characterized by the features of claim 2.

Zweckmäßige Ausgestaltungen und Weiterbildungen sowie weitere Vorteile und wesentliche Einzelheiten sind den Merkmalen der Unteransprüche, der nachfolgenden Be­schreibung und der Zeichnung zu entnehmen, die in sche­matischer Darstellung bevorzugte Ausführungsformen als Beispiel zeigt. Es stellen dar:

  • FIG. 1 ein erfingunsgemäßes Relais in vergrößerter Darstellung in Seitenansicht,
  • FIG. 2 einen Teil des erfindungsgemäßen Relais in ver­größerter Darstellung und geschnittener Seiten­ansicht mit in das Joch eingestecktem, aber noch nicht befestigten Spulenkern und
  • FIG. 3 den Teil des Relais gemäß FIG. 2, jedoch mit am Joch endgültig befestigtem Spulenkern.
Expedient refinements and developments as well as further advantages and essential details can be found in the features of the subclaims, the following description and the drawing, which shows preferred embodiments as examples in a schematic representation. They represent:
  • FIG. 1 a relay according to the invention in an enlarged illustration in a side view,
  • FIG. 2 shows a part of the relay according to the invention in an enlarged illustration and a sectional side view with the coil core inserted but not yet fastened into the yoke
  • FIG. 3 the part of the relay according to FIG. 2, but with the coil core finally attached to the yoke.

Das in der Zeichnung dargestellte erfindungsgemäße Re­lais 1 kann an einer Leiterplatte 2 installiert werden, die an ihrer Unter- und/oder Oberseite hier nicht dar­gestellte Leiterbahnen aufweisen kann. Das Relais 1 weist ein aus einem ferromagnetischen Material herge­stelltes Joch 3 auf, das eine rückwärtige Wand 4 und einen von dieser rechtwinklig abgebogenen Schen­kel 5 besitzt. An der Jochwand 4 ist ein mit einem im Durchmesser reduzierten Ansatz 6 versehener Kern 7 be­festigt, der ebenfalls aus ferromagnetischem Material besteht und mit seiner Achse 8 auf Abstand parallel zum Schenkel 5 liegt. Der Kern 7 trägt einen aus Iso­lierstoff bestehenden Spulenkörper 9, der eine Stirn­platte 10 und eine Rückplatte 11 aufweist und eine aus Spulendraht gewickelte Spule 12 trägt.The relay 1 according to the invention shown in the drawing can be installed on a printed circuit board 2, which can have conductor tracks (not shown here) on its lower and / or upper side. The relay 1 has a yoke 3 made of a ferromagnetic material, which has a rear wall 4 and a leg 5 bent at right angles therefrom. On the yoke wall 4 a core 7 is provided with a reduced diameter extension 6, which is also made of ferromagnetic material and is at a distance parallel to the leg 5 with its axis 8. The core 7 carries a coil body 9 made of insulating material, which has an end plate 10 and a back plate 11 and carries a coil 12 wound from coil wire.

An der Unterseite des Relais 1 können an der Joch­wand 4 ausgebildete Befestigungszapfen 13 und zu Ruhe­kontakten 14, Arbeitskontakten 15 und Spulenanschluß­teilen 16 gehörende Steckzapfen 17 vorgesehen sein, die entsprechend einem in der Leiterplatte 2 ausgebil­deten Lochraster auf Abstand zueinander angeordnet sind und in die Löcher der Leiterplatte 2 eingesteckt werden können.On the underside of the relay 1 can be provided on the yoke wall 4 formed mounting pin 13 and to the normally closed contacts 14, working contacts 15 and coil connecting parts 16 plug pins 17 are provided, which are arranged at a distance from one another in accordance with a hole pattern formed in the printed circuit board 2 are and can be inserted into the holes in the circuit board 2.

Am oberen Winkeleckbereich des Jochs 3 kann ein nach oben vorstehender Zapfen 18 ausgebildet sein, an dem eine Schraubenzugfeder 19 befestigbar ist. Das andere Ende der Schraubenfeder 19 kann an einem ebenfalls nach oben vorstehenden Steg 20 eines gleichfalls aus ferromagnetischem Material bestehenden Klappankers 21 befestigt sein. Der Klappanker 21 ist an einem am Jochschenkel 5 ausgebildeten Widerlager 22 schwenkbar gelagert. Auf dem Jochschenkel 3 kann eine Metal­litze 23 befestigt sein, die mit ihrem anderen Ende am Klappanker 21 kontaktiert ist. An der Vorderseite des Klappankers 21 kann ein dünnes Kontaktfederblech 24 vorgesehen sein, das einen oder mehrere zwischen den Ruhekontakten 14 und den Arbeitskontakten 15 angeord­nete Schaltkontakte 25 aufweisen kann.At the upper corner corner area of the yoke 3, an upwardly projecting pin 18 can be formed, to which a helical tension spring 19 can be attached. The other end of the coil spring 19 can be fastened to a web 20, which also protrudes upward, of a hinged anchor 21 which is also made of ferromagnetic material. The hinged anchor 21 is pivotally mounted on an abutment 22 formed on the yoke leg 5. On the yoke leg 3, a metal braid 23 can be attached, which is contacted with its other end on the hinged anchor 21. At the front of the hinged armature 21, a thin contact spring plate 24 can be provided, which can have one or more switching contacts 25 arranged between the normally closed contacts 14 and the working contacts 15.

Insbesondere der FIG. 2 ist zu entnehmen, daß an der rückwärtigen Wand 4 des Jochs 3 ein Durchzug 26 ausge­bildet sein kann, der einen an der Innenseite 27 der Jochwand 4 vorstehenden Vorsprung 28 und eine Ver­tiefung 29 aufweisen kann, die an der gegenüberlie­genden Außenseite 30 der Jochwand 4 ausgebildet ist. In das den Innendurchmesser des Durchzugs 26 bestim­mende Loch 31 kann der Ansatz 6 des Kerns 7 einge­steckt werden, so daß der Kern 7 mit einer Anschlag­fläche 32 an einer durch den Außendurchmesser und den Innendurchmesser des Vorsprungs 28 begrenzten Kreis­ringfläche 33 zur Anlage gelangt. Der Durchmesser des Kerns 7 und der Außendurchmesser des Vorsprungs 28 können vorzugsweise ungefähr gleich sein. Ebenso kann der Durchmesser des Spulenkernansatzes 6 zweckmäßig gleich oder nur etwas kleiner sein als der Durchmesser des Durchzugloches 31, so daß der Ansatz 6 bei der Montage weitgehend spielfrei in den Vorsprung 28 ein­gesteckt werden kann.In particular the FIG. 2 it can be seen that a passage 26 can be formed on the rear wall 4 of the yoke 3, which can have a projection 28 projecting on the inside 27 of the yoke wall 4 and a recess 29 which is formed on the opposite outside 30 of the yoke wall 4 is. The extension 6 of the core 7 can be inserted into the hole 31 determining the inside diameter of the passage 26, so that the core 7 comes to rest with a stop surface 32 on an annular surface 33 delimited by the outside diameter and the inside diameter of the projection 28. The diameter of the core 7 and the outer diameter of the protrusion 28 may preferably be approximately the same. Likewise can the diameter of the coil core extension 6 expediently be the same or only slightly smaller than the diameter of the pull-through hole 31, so that the extension 6 can be inserted into the projection 28 largely without play during assembly.

Darüber hinaus kann es günstig sein, die durch den In­nendurchmesser und den Außendurchmesser des Vorsprungs 28 begrenzte Breite der Kreisringfläche 33 so zu ge­stalten, daß sie ungefähr genauso breit ist wie die Dicke der Jochwand 4. Dabei kann es in bevorzugter Ausführung zudem vorteilhaft sein, den durch das Loch 31 bestimmten Innendurchmesser des Vorsprungs 28 und dessen Außendurchmesser so aufeinander abzustimmen, daß der Vorsprungsaußendurchmesser ungefähr doppelt so groß ist wie der Vorsprungsinnendurchmesser beziehungs­weise der Durchmesser des Loches 31. Gemäß der Dar­stellung in FIG. 2 kann der in der Jochwand 4 ausge­bildete Durchzug 26 vorteilhaft so gestaltet sein, daß das Maß der rückseitigen Vertiefung 29 und die Länge des die Jochwandinnenseite 27 überragenden Vorsprungs 28 in axialer Richtung etwa gleich sind. Dazu kann es zweckmäßig sein, das Maß der Vertiefung 29 inner­halb der Jochwand 4 und/oder die Länge des an der In­nenseite 27 vorstehenden Vorsprungs 28 in axialer Richtung so auszulegen, daß sie annähernd gleich oder größer als die halbe Dicke der Jochwand 4 ist. Wie der FIG. 2 außerdem zu entnehmen ist, kann die axiale Länge des Ansatzes 6 etwas größer sein als der Abstand zwischen dem Grund der Vertiefung 29 und der Kreis­ringfläche 33, so daß der Ansatz 6 in die Vertiefung 29 des Durchzugs 26 hineinragt.In addition, it may be expedient to design the width of the circular ring surface 33, which is limited by the inner diameter and the outer diameter of the projection 28, so that it is approximately as wide as the thickness of the yoke wall 4. In a preferred embodiment, it may also be advantageous for the through the hole 31 determined inner diameter of the projection 28 and its outer diameter so that the outer diameter of the projection is approximately twice as large as the inner diameter of the projection or the diameter of the hole 31. As shown in FIG. 2, the passage 26 formed in the yoke wall 4 can advantageously be designed such that the dimension of the rear recess 29 and the length of the projection 28 projecting beyond the yoke wall inside 27 are approximately the same in the axial direction. For this purpose, it may be expedient to design the dimension of the recess 29 within the yoke wall 4 and / or the length of the projection 28 projecting on the inside 27 in the axial direction such that it is approximately equal to or greater than half the thickness of the yoke wall 4. As shown in FIG. 2 can also be seen, the axial length of the extension 6 can be somewhat larger than the distance between the bottom of the recess 29 and the annular surface 33, so that the extension 6 protrudes into the recess 29 of the passage 26.

Bei der in der FIG. 2 gezeigten Montagestellung befin­det sich die dem Ansatz 6 gegenüberliegende Polfläche 34 des Kerns 7 auf Grund des an der Jochwandinnenseite 27 vorstehenden Vorsprungs 28 in einer Ebene vor dem Widerlager 22, so daß die Distanz 35 zwischen der Pol­fläche 34 und der Jochwandinnenseite 27 größer ist als das Vorgabemaß 36 zwischen der Jochwandinnenseite 27 und dem Widerlager 22 und zwischen der Ebene der Pol­fläche 34 und der Ebene des Widerlagers 22 ein Abstand 37 besteht. Bei der Verbindung des Spulenkerns 7 mit dem Joch 3 wird nun so vorgegangen, daß auf die Pol­fläche 34 des Kerns 7 eine in axialer Pfeilrichtung wirkende Druckkraft 38 ausgeübt wird. Dabei wird die Anschlagfläche 32 des Spulenkerns 7 fest gegen die Kreisringfläche 33 des vorstehenden Wandvorsprungs 28 gedrückt, und zwar derart, daß der Wandvorsprung 28 in Richtung zur Ebene der Jochwand 4 zurückgedrückt wird, so daß die Kernanschlagfläche 32 und die Kreis­ringfläche 33 ungefähr in oder geringfügig vor der Ebene der Innenseite 27 der Jochwand 4 sich befinden, wie es in FIG. 3 in der Endmontagestellung dargestellt ist. Der Vorsprung 28 ist dabei vorzugsweise so weit zurückgedrückt worden, daß die Kernpolfäche 34 in der­selben Ebene wie das Widerlager 22 liegt. Der aus FIG. 2 ersichtliche Abstand 37 zwischen der Ebene des Widerlagers 22 und der Ebene der Polfläche 34 besteht beim bevorzugten Ausführungsbeispiel gemäß FIG. 1 und 3 somit nicht mehr, sondern ist im wesentlichen auf Null reduziert worden. Hierbei kann es vorteilhaft sein, die Länge des Spulenkerns 7 von der Polfläche 34 bis zur Anschlagfläche 32 zuzüglich der Länge des gemäß FIG. 3 zurückgedrückten Vorsprungs 28 von der Innenseite 27 bis zur Kernanschlagfläche 32 so zu gestalten, daß die Addition der vorgenannten Teillän­gen gleich dem Vorgabemaß 36 zwischen der Innenseite 27 und dem Widerlager 22 ist. Es liegt jedoch auch im Rahmen der Erfindung, bei der erfindungsgemäßen Be­festigung des Spulenkerns 7 den Vorsprung 28 weniger oder mehr zurückzudrücken, so daß die Distanz 35 zwi­schen der Jochwandinnenseite 27 und der Kernpolfläche 34 etwas kleiner oder größer ist als das Vorgabemaß 36 zwischen der Jochwandinnenseite 27 und dem KLappanker­widerlager 22. Darüber hinaus kann es günstig sein, das freie Ende des Kernansatzes 6 an der Jochwand­außenseite 30 so zu vernieten,daß mindestens ein Teil des Nietbundes 39 in der Vertiefung 29 des Durchzugs 26 liegt.When in the FIG. 2 shown assembly position is the opposite pole face 34 of the core 7 due to the protrusion 28 projecting on the yoke wall inside 27 in a plane in front of the abutment 22, so that the distance 35 between the pole face 34 and the yoke wall inside 27 is greater than that Default dimension 36 is a distance 37 between the inside of the yoke wall 27 and the abutment 22 and between the plane of the pole face 34 and the plane of the abutment 22. When connecting the coil core 7 to the yoke 3, the procedure is now such that a compressive force 38 acting in the axial direction of the arrow is exerted on the pole face 34 of the core 7. The stop surface 32 of the coil core 7 is pressed firmly against the annular surface 33 of the protruding wall projection 28, in such a way that the wall projection 28 is pushed back towards the plane of the yoke wall 4, so that the core stop surface 32 and the annular surface 33 are approximately in or slightly in front of the plane of the inside 27 of the yoke wall 4, as shown in FIG. 3 is shown in the final assembly position. The projection 28 has preferably been pushed back so far that the core pole surface 34 lies in the same plane as the abutment 22. The from FIG. 2 apparent distance 37 between the plane of the abutment 22 and the plane of the pole face 34 is in the preferred embodiment shown in FIG. 1 and 3 no longer, but has essentially been reduced to zero. It can be advantageous here to length the coil core 7 from the pole face 34 to the stop face 32 plus the length of the surface shown in FIG. 3 pushed back projection 28 from the inside 27 to the core stop surface 32 so shape that the addition of the aforementioned partial lengths is equal to the default dimension 36 between the inside 27 and the abutment 22. However, it is also within the scope of the invention to push back the projection 28 less or more when fastening the coil core 7 according to the invention, so that the distance 35 between the yoke wall inside 27 and the core pole face 34 is somewhat smaller or larger than the standard dimension 36 between the yoke wall inside 27 and the KLappanker abutment 22. In addition, it may be favorable to rivet the free end of the core extension 6 on the outside of the yoke wall 30 in such a way that at least part of the rivet collar 39 lies in the recess 29 of the passage 26.

Ein Vorteil des erfindungsgemäßen Herstellungsverfah­rens und des danach hergestellten Relais besteht darin, daß der Kern 7 äußerst maßgenau und dauerhaft fest mit der Jochwand 4 verbunden werden kann, wobei zudem ein großflächiger Stoffschluß im Verbindungsbe­reich der beiden Teile gegeben ist, so daß bei kleinem magnetischen Übergangswiderstand ein hoher magneti­scher Kraftlinienfluß erzielt werden kann. Beim Zu­rückdrücken des Wandvorsprungs 28 mittels der Druck­kraft 38 wird die Wandung des Durchzugs 26 durch stauchähnliche Verformung fest gegen den Umfang des Kernansatzes 6 gepreßt und gleichzeitig wird die Kernanschlagfläche 32 gegen die Kreisringfläche 33 des Vorsprungs 28 gepreßt, so daß mit dem Nietbund 39 eine kraft- und formschlüssige Festverbindung gegeben ist, die sowohl im Durchzug 26 als auch an dessen Innen-­und Außenseiten axial und radial druckkraftschlüßig ist.An advantage of the manufacturing method according to the invention and the relay manufactured according to it is that the core 7 can be connected extremely dimensionally and permanently firmly to the yoke wall 4, wherein there is also a large-area material bond in the connection area of the two parts, so that a small magnetic contact resistance high magnetic force flux can be achieved. When the wall projection 28 is pressed back by means of the pressure force 38, the wall of the passage 26 is pressed firmly against the circumference of the core projection 6 by compression-like deformation, and at the same time the core stop surface 32 is pressed against the circular ring surface 33 of the projection 28, so that a force-fit with the rivet collar 39 and a form-fitting fixed connection is provided, which is axially and radially non-positive in the passage 26 as well as on the inner and outer sides thereof.

Claims (11)

1. Verfahren zur Herstellung eines elektromagnetischen Relais, insbesondere Klappankerrelais (1), mit einem ferromagnetischen Joch (3) und einem ferromagnetischen Spulenkern (7), der mit einem in eine Jochwand (4) ein­greifenden Ansatz (6) festlegbar ist, wobei der Kern (7) für einen Toleranzausgleich unter Verformung des Jochmaterials bis zu einem vorgegebenen Maß axial ver­lagert wird, dadurch gekennzeichnet, daß der Kern (7) gegen einen vorstehenden Wandvorsprung (28) gedrückt und der Wandvorsprung (28) in Richtung zur Ebene der Jochwand (4) zurückgedrückt wird.1. A method for producing an electromagnetic relay, in particular folding armature relay (1), with a ferromagnetic yoke (3) and a ferromagnetic coil core (7), which can be fixed with an approach (6) engaging in a yoke wall (4), the core (7) for tolerance compensation while deforming the yoke material to a predetermined extent, characterized in that the core (7) is pressed against a projecting wall projection (28) and the wall projection (28) towards the plane of the yoke wall (4th ) is pushed back. 2. Nach vorstehendem Verfahren hergestelltes Relais, insbesondere Klappankerrelais, dadurch gekennzeichnet, daß der Vorsprung (28) als an der dem Kern (7) zuge­wandten Jochwandinnenseite (27) ausgeprägter Durchzug (26) ausgebildet ist.2. Relay manufactured in accordance with the above method, in particular folding armature relay, characterized in that the projection (28) is designed as a passage (26) which is pronounced on the inside of the yoke wall (27) facing the core (7). 3. Relais nach vorstehendem Anspruch, dadurch gekenn­zeichnet, daß der Durchzug (26) an der der Innenseite (27) gegenüberliegenden Jochwandaußenseite (30) eine Vertiefung (29) aufweist.3. Relay according to the preceding claim, characterized in that the passage (26) on the inside (27) opposite yoke wall outside (30) has a recess (29). 4. Relais nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet,daß das Maß der Ver­ tiefung (29) des Durchzugs (26) in der Jochwand (4) ungefähr gleich oder größer als die halbe Dicke der Jochwand (4) ist.4. Relay according to one or more of the preceding claims, characterized in that the degree of Ver Indentation (29) of the passage (26) in the yoke wall (4) is approximately equal to or greater than half the thickness of the yoke wall (4). 5. Relais nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Vertiefung (29) und der Vorsprung (28) des Jochwanddurchzugs (26) ungefähr gleich sind.5. Relay according to one or more of the preceding claims, characterized in that the recess (29) and the projection (28) of the yoke wall passage (26) are approximately the same. 6. Relais nach einem oder mehreren der vorste­henden Ansprüche, dadurch gekennzeichnet, daß der Vor­sprung (28) des Durchzugs (26) eine Kreisringfläche (33) aufweist, deren Außendurchmesser bevorzugt etwa doppelt so groß ist wie der durch ein Loch (31) gebildete Innendurchmesser, in das der Ansatz (6) des Spulenkerns (7) einsteckbar ist.6. Relay according to one or more of the preceding claims, characterized in that the projection (28) of the passage (26) has an annular surface (33) whose outer diameter is preferably approximately twice as large as the inner diameter formed by a hole (31) , in which the approach (6) of the coil core (7) can be inserted. 7. Relais nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Außendurch­messer des Vorsprungs (28) und der des Spulenkerns (7) etwa gleich sind.7. Relay according to one or more of the preceding claims, characterized in that the outer diameter of the projection (28) and that of the coil core (7) are approximately the same. 8. Relais nach einem oder mehreren der vorstehenden Ansprpüche, dadurch gekennzeichnet, daß die durch den Innen- und Außendurchmesser begrenzte Breite der Kreisringfläche (33) des Vorsprungs (28) ungefähr gleich der Dicke der Jochwand (4) ist.8. Relay according to one or more of the preceding claims, characterized in that the width of the annular surface (33) of the projection (28) limited by the inner and outer diameter is approximately equal to the thickness of the yoke wall (4). 9. Relais nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß eine gegen den zurückgedrückten Vorsprung (28) gepreßte Anschlag­fläche (32) des Spulenkerns (7) ungefähr in oder etwas vor der Ebene der Jochwandinnenseite (27) liegt.9. Relay according to one or more of the preceding claims, characterized in that an abutment surface (32) of the coil core (7) pressed against the pushed-back projection (28) lies approximately in or somewhat in front of the plane of the inner side of the yoke wall (27). 10. Relais nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß an der Außen­seite (30) der Jochwand (4) ein Nietbund (39) des Spulenkernansatzes (6) in der Vertiefung (29) des Durchzugs (26) angeordnet ist.10. Relay according to one or more of the preceding claims, characterized in that on the outside (30) of the yoke wall (4) a rivet collar (39) of the coil core extension (6) is arranged in the recess (29) of the passage (26). 11. Relais nach einem oder mehreren der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Länge des Spulenkerns (7) von einer freien Polfläche (34) bis zur Anschlagfläche ( 32) zuzüglich der Länge des zu­rückgedrückten Vorsprungs (28) von der Kernanschlag­fläche (32) bis zur Innenseite (27) der Jochwand (4) gleich dem Vorgabemaß (36) zwischen der Jochwandinnen­seite (27) und einem Ankerwiderlager (22) eines von der Jochwand (4) rechtwinklig abstrebenden Jochschen­kels (5) ist.11. Relay according to one or more of the preceding claims, characterized in that the length of the coil core (7) from a free pole face (34) to the stop surface (32) plus the length of the recessed projection (28) from the core stop surface (32) up to the inside (27) of the yoke wall (4) is equal to the default dimension (36) between the inside of the yoke wall (27) and an anchor abutment (22) of a yoke leg (5) striving at right angles from the yoke wall (4).
EP89122261A 1988-12-20 1989-12-02 Method for making an electromagnetic relay, and relay obtained thereby Expired - Lifetime EP0374552B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3842815A DE3842815A1 (en) 1988-12-20 1988-12-20 METHOD FOR PRODUCING AN ELECTROMAGNETIC RELAY AND RELATED PRODUCED RELAY
DE3842815 1988-12-20

Publications (3)

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EP0374552A2 true EP0374552A2 (en) 1990-06-27
EP0374552A3 EP0374552A3 (en) 1994-01-19
EP0374552B1 EP0374552B1 (en) 1997-06-18

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EP89122261A Expired - Lifetime EP0374552B1 (en) 1988-12-20 1989-12-02 Method for making an electromagnetic relay, and relay obtained thereby

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US (1) US5051716A (en)
EP (1) EP0374552B1 (en)
AT (1) ATE154723T1 (en)
BR (1) BR8906577A (en)
DE (3) DE3842815A1 (en)
ES (1) ES2104559T3 (en)
IE (1) IE80480B1 (en)
PT (1) PT92632B (en)

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EP0707332A1 (en) * 1994-10-12 1996-04-17 Robert Bosch Gmbh Electromagnetic relay and method of making it

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DE10304675B4 (en) * 2002-02-07 2009-08-20 Tyco Electronics Amp Gmbh Switching relay with a magnetic coil and method for producing a switching relay
ITPC20050005U1 (en) * 2005-03-10 2006-09-11 Electrica Srl VOLTMETRIC RELAY WITH RIGID CONNECTORS TO CONNECT THE BOBBIN WIRE TO THE FASTON TERMINALS
TWI680483B (en) * 2019-07-03 2019-12-21 百容電子股份有限公司 Electromagnetic relay

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DE3210031A1 (en) * 1982-03-19 1982-10-21 Alois Zettler Elektrotechnische Fabrik GmbH, 8000 München Yoke-core connection on electromagnetic relays
EP0082238A1 (en) * 1981-12-18 1983-06-29 Hermann Stribel KG Relay
US4596972A (en) * 1983-10-31 1986-06-24 Amf Incorporated Miniature power switching relays
US4749977A (en) * 1984-11-26 1988-06-07 United Technologies Corporation Coil mounting arrangement and its method of manufacture

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FR1543930A (en) * 1966-10-13 1968-10-31 Soprotekel Method of fixing magnetic cores in relays or pole pieces
US4720909A (en) * 1983-10-31 1988-01-26 Amf Inc. Method of manufacturing miniature power switching relays

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EP0082238A1 (en) * 1981-12-18 1983-06-29 Hermann Stribel KG Relay
DE3210031A1 (en) * 1982-03-19 1982-10-21 Alois Zettler Elektrotechnische Fabrik GmbH, 8000 München Yoke-core connection on electromagnetic relays
US4596972A (en) * 1983-10-31 1986-06-24 Amf Incorporated Miniature power switching relays
US4749977A (en) * 1984-11-26 1988-06-07 United Technologies Corporation Coil mounting arrangement and its method of manufacture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707332A1 (en) * 1994-10-12 1996-04-17 Robert Bosch Gmbh Electromagnetic relay and method of making it
US5689222A (en) * 1994-10-12 1997-11-18 Robert Bosch Gmbh Electromagnetic relay and method for the production thereof

Also Published As

Publication number Publication date
IE80480B1 (en) 1998-08-12
DE8815777U1 (en) 1990-04-26
EP0374552A3 (en) 1994-01-19
DE3842815A1 (en) 1990-06-21
EP0374552B1 (en) 1997-06-18
BR8906577A (en) 1990-09-04
US5051716A (en) 1991-09-24
ES2104559T3 (en) 1997-10-16
DE3842815C2 (en) 1990-12-20
ATE154723T1 (en) 1997-07-15
PT92632B (en) 1995-09-12
DE58909803D1 (en) 1997-07-24
PT92632A (en) 1990-06-29

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