EP0811995A1 - Magnet coil and method for manufacturing the same - Google Patents

Magnet coil and method for manufacturing the same Download PDF

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Publication number
EP0811995A1
EP0811995A1 EP97106396A EP97106396A EP0811995A1 EP 0811995 A1 EP0811995 A1 EP 0811995A1 EP 97106396 A EP97106396 A EP 97106396A EP 97106396 A EP97106396 A EP 97106396A EP 0811995 A1 EP0811995 A1 EP 0811995A1
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EP
European Patent Office
Prior art keywords
coil
contact pins
coil wire
wound
magnetic
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
EP97106396A
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German (de)
French (fr)
Other versions
EP0811995B1 (en
Inventor
Robert Bast
Frank Rieck
Klaus-Dieter Wüstefeld
Werner Leuschner
Horst Grove
Heinrich Rheinländer
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Nass Magnet GmbH
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Nass Magnet GmbH
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Publication date
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Publication of EP0811995A1 publication Critical patent/EP0811995A1/en
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Publication of EP0811995B1 publication Critical patent/EP0811995B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F2007/062—Details of terminals or connectors for electromagnets
    • 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
    • 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
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling

Definitions

  • the invention relates to a magnetic coil and a method for its production.
  • the electrical connection between the contact pins and the coil wire which is usually insulated with lacquer, is produced by suitable mechanical or electrical energy application.
  • the contact pin and the coil wire are excited by coupling vibrations in the ultrasound range, contacting being produced by the friction between the coil wire held under pretension and individual regions of the contact pins that come into contact with the wound coil wire.
  • the connecting tongues are usually welded to the contact pins.
  • the resulting relatively rigid connection leads to a relatively high failure rate in the mass production of such magnetic coils by tearing off the usually very thin coil wire, which may be only 0.04 mm thick. This demolition is caused by the inevitable Relative movements of the connecting tongues to the coil body when inserting and processing in the plastic coating form.
  • the invention is therefore based on the object of improving the magnet coil and the method for its production with a view to a lower failure rate and thereby simplifying the production.
  • connection between the connecting tongue and the contact pin not only permits a relative displacement in the longitudinal direction of the contact pin, but also additionally transversely to this direction. This provides an additional degree of freedom, which ensures an even more flexible connection between the connecting tongue and the contact pin or coil body.
  • the coil wire which is usually coated with an insulating lacquer layer, is contacted with the contact pins by dip soldering.
  • the area of the contact pins, which is wrapped with the coil wire is immersed in a solder bath, the temperature of which is so high that the insulating lacquer dissolves and an electrical connection between the contact pin and the coil wire results from the solder.
  • the magnetic coil shown in FIG. 1 essentially consists of a coil body 1 with a wound coil wire 2, a magnetic core 3 and an armature 4.
  • two contact pins 5, 6 are provided, around each of which one end of the coil wire 2 is wound. These contact pins 5, 6 are inserted at one end into the coil body 1 and are each coupled at their other end to a connecting tongue 7, 8.
  • the two connecting tongues 7, 8 are arranged on a tongue carrier 9 which is held on a magnet yoke 10 of the magnet coil.
  • the connecting tongues 7, 8 have clamping means for coupling to the contact pins 5, 6, which on the one hand ensure an electrical connection and on the other hand a displaceability of the connecting tongues relative to the contact pins in the longitudinal direction thereof.
  • these clamping means also allow the connecting tongues to be displaced relative to the contact pins transversely to the longitudinal direction of the contact pins.
  • these clamping means are designed as slots 11, 12 in the connecting tongues 7, 8, the contact pins 5, 6 being held between the flanks 11a, 11b and 12a, 12b delimiting the slot 11, 12.
  • the two flanks 11a, 11b and 12a, 12b are slightly bent, the resulting slot width being slightly smaller than the width of the contact pins, which are preferably square in cross section.
  • the two flanks of a slot have a resilient effect, so that a secure electrical connection is ensured when plugged onto a contact pin. Even after plugging in, the connecting tongues can be moved in the longitudinal direction of the contact pins (double arrow 13).
  • this type of coupling also enables a relative mobility transversely to the longitudinal direction of the contact pins, as is indicated by the double arrow 14.
  • the contact pins are displaced in the direction of the slots 11, 12.
  • connection carrier 9 shown in FIG. 5, this connection carrier 9 having two snap hooks 15, 16 which can be coupled to the magnetic yoke 10. At the same time, an electrical contact is made between a grounding tongue 17 and the magnetic yoke 10. While the individual connecting tongues consist of electrically conductive material, in particular metal, the connection carrier 9 is made of non-conductive material, preferably plastic.
  • FIG. 6 shows a second exemplary embodiment according to the invention, which differs from the previously described variant only in that the connecting tongues 7, 8 are not arranged on a connecting carrier.
  • the two ends of the coil wire 2 are automatically wound onto one of the two contact pins 5, 6.
  • the contact pins are then pressed deeper into the coil body 1 in order to relieve the wound coil wire.
  • the connecting tongues 7, 8 are plugged onto the contact pins 5, 6.
  • the connecting tongues are held on the connecting carrier, so that the push-on operation for both connecting tongues takes place simultaneously.
  • the holder of the connection carrier is ensured via the snap hooks 15, 16.
  • the magnetic coil is encased in a suitable form with plastic.
  • the type of connection of coil wire 2 and contact pins 5, 6, on the one hand, and the clamping means of the connecting tongues represent means which considerably simplify the manufacturing process itself. A welding process can thus be dispensed with, in particular when contacting the connecting tongues.
  • the magnetic coils according to the invention can be produced not only with less effort but also with a lower reject rate.
  • Solenoid coils of this type are used, for example, in connection with solenoid valve coils with which valves of fluid lines can be controlled.

Abstract

The electromagnet/solenoid has a housing Ä18Ü within which a coil Ä2Ü wound on a former Ä1Ü is located. At the centre of the coil is a core Ä3Ü and armature (4). The ends of the coils are brought out to a pair of metal connector blades Ä7Ü. The blades are embedded in the housing and connect with the ends of round pins Ä5Ü that are connected to the ends of the coils. The coil ends are wound and soldered to the pins. The pins are a press fit into shaped holes in the connector blades.

Description

Die Erfindung betrifft eine Magentspule sowie ein Verfahren zu deren Herstellung.The invention relates to a magnetic coil and a method for its production.

Aus der Praxis sind Magnetspulen bekannt, bestehend aus

  • einem Spulenkörper aus gewickeltem Spulendraht, dessen beide Enden nach außen geführt sind,
  • zwei Kontaktstiften, die jeweils mit einem Ende des Spulendrahts umwickelt sind,
  • zwei mit den Kontaktstiften koppelbare Anschlußzungen sowie
  • einer Kunststoffummantelung.
Magnetic coils consisting of are known from practice
  • a coil body made of wound coil wire, the two ends of which are led outwards,
  • two contact pins, each wrapped with one end of the coil wire,
  • two connecting tongues that can be coupled with the contact pins and
  • a plastic jacket.

Die Herstellung der elektrischen Verbindung zwischen den Kontaktstiften und dem meist mit Lack isolierten Spulendraht wird durch geeignete mechanische oder elektrische Energiebeaufschlagung bewirkt. Aus der DE-A-43 13 608 wird hierzu der Kontaktstift und der Spulendraht durch Einkopplung von Schwingungen im Ultraschallbereich angeregt, wobei durch die Reibung zwischen dem unter Vorspannung gehaltenen Spulendraht und einzelnen, den gewickelten Spulendraht berührenden Bereichen der Kontaktstifte Kontaktierungen entstehen. Die Anschlußzungen werden üblicherweise mit den Kontaktstiften verschweißt. Die dabei entstehende relativ starre Verbindung führt bei der Massenherstellung derartiger Magnetspulen zu einer relativ hohen Ausfallquote durch Abriß des meist sehr dünnen Spulendrahts, der u.U. nur 0,04 mm dick ist. Dieser Abriß entsteht durch die unvermeidlichen Relativbewegungen der Anschlußzungen zum Spulenkörper beim Einlegen und Verarbeiten in der Kunststoffummantelungsform.The electrical connection between the contact pins and the coil wire, which is usually insulated with lacquer, is produced by suitable mechanical or electrical energy application. From DE-A-43 13 608, the contact pin and the coil wire are excited by coupling vibrations in the ultrasound range, contacting being produced by the friction between the coil wire held under pretension and individual regions of the contact pins that come into contact with the wound coil wire. The connecting tongues are usually welded to the contact pins. The resulting relatively rigid connection leads to a relatively high failure rate in the mass production of such magnetic coils by tearing off the usually very thin coil wire, which may be only 0.04 mm thick. This demolition is caused by the inevitable Relative movements of the connecting tongues to the coil body when inserting and processing in the plastic coating form.

Der Erfindung liegt daher die Aufgabe zugrunde, die Magnetspule und das Verfahren zu deren Herstellung im Hinblick auf eine geringere Ausfallquote zu verbessern und dabei die Herstellung zu vereinfachen.The invention is therefore based on the object of improving the magnet coil and the method for its production with a view to a lower failure rate and thereby simplifying the production.

Diese Aufgabe wird durch die Merkmale der Ansprüche 1 und 6 gelöst.This object is solved by the features of claims 1 and 6.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.

Indem die Anschlußzungen mit den Kontaktstiften derart gekoppelt werden, daß einerseits eine elektrische Verbindung und andererseits eine Verschiebbarkeit der Anschlußzunge gegenüber dem Kontaktstift in dessen Längsrichtung gewährleistet ist, ergibt sich eine relativ flexible Verbindung zwischen Kontaktstift und Anschlußzungen. Diese Verbindung fängt die unvermeidlichen Relativbewegungen der Anschlußzungen in bezug auf den Spulenkörper auf, ohne daß es dabei zum Abriß des Spulendrahtes am Kontaktstift kommt.By coupling the connecting tongues to the contact pins in such a way that on the one hand an electrical connection and on the other hand a displaceability of the connecting tongue with respect to the contact pin in its longitudinal direction is ensured, a relatively flexible connection between the contact pin and connecting tongues results. This connection catches the inevitable relative movements of the connecting tongues with respect to the coil body, without the coil wire tearing off on the contact pin.

In einer besonders vorteilhaften Ausgestaltung erlaubt die Verbindung zwischen Anschlußzunge und Kontaktstift nicht nur eine Relativerschiebung in Längsrichtung des Kontaktstiftes, sondern auch zusätzlich quer zu dieser Richtung. Dadurch wird ein zusätzlicher Freiheitsgrad bereitgestellt, der eine noch flexiblere Verbindung zwischen Anschlußzunge und Kontaktstift bzw. Spulenkörper gewährleistet.In a particularly advantageous embodiment, the connection between the connecting tongue and the contact pin not only permits a relative displacement in the longitudinal direction of the contact pin, but also additionally transversely to this direction. This provides an additional degree of freedom, which ensures an even more flexible connection between the connecting tongue and the contact pin or coil body.

Erfindungsgemäß wird der Spulendraht, der üblicherweise mit einer isolierenden Lackschicht überzogen ist, durch Tauchlötung mit den Kontaktstiften kontaktiert. Dazu wird der Bereich der Kontaktstifte, der mit dem Spulendraht umwickelt ist, in ein Lotbad eingetaucht, dessen Temperatur so hoch ist, daß sich der Isolierlack auflöst und sich durch das Lot eine elektrische Verbindung zwischen Kontaktstift und Spulendraht ergibt.According to the invention, the coil wire, which is usually coated with an insulating lacquer layer, is contacted with the contact pins by dip soldering. For this purpose, the area of the contact pins, which is wrapped with the coil wire, is immersed in a solder bath, the temperature of which is so high that the insulating lacquer dissolves and an electrical connection between the contact pin and the coil wire results from the solder.

Weitere Vorteile und Ausgestaltungen der Erfindung werden anhand der nachfolgenden Beschreibung eines Ausführungsbeispieles und der Zeichnung näher erläutert.Further advantages and refinements of the invention are explained in more detail on the basis of the following description of an exemplary embodiment and the drawing.

In der Zeichnung zeigen

Fig.1
eine Schnittdarstellung einer erfindungsgemäßen Magnetspule,
Fig.2
eine Schnittdarstellung längs der Linie II-II der Fig.1,
Fig.3
eine vergrößerte Detailansicht im Bereich der Kontaktierung zwischen Anschlußzunge und Kontaktstift,
Fig.4
eine Schnittdarstellung an der Linie IV der Fig.1;
Fig.5
eine Aufsicht auf einen Anschlußzungenträger sowie
Fig.6
eine Schnittdarstellung eines zweiten Ausführungsbeispieles.
Show in the drawing
Fig. 1
2 shows a sectional illustration of a magnetic coil according to the invention,
Fig. 2
2 shows a sectional illustration along the line II-II of FIG. 1,
Fig. 3
an enlarged detail view in the area of contact between the connecting tongue and contact pin,
Fig. 4
a sectional view on the line IV of Figure 1;
Fig. 5
a supervision of a tongue carrier as well
Fig. 6
a sectional view of a second embodiment.

Die in Fig.1 dargestellte Magnetspule besteht im wesentlichen aus einem Spulenkörper 1 mit gewickeltem Spulendraht 2, einem Magnetkern 3 sowie einem Anker 4.The magnetic coil shown in FIG. 1 essentially consists of a coil body 1 with a wound coil wire 2, a magnetic core 3 and an armature 4.

Ferner sind zwei Kontaktstifte 5, 6 vorgesehen, um die jeweils ein Ende des Spulendrahtes 2 gewickelt ist. Diese Kontaktstifte 5, 6 stecken mit ihrem einen Ende im Spulenkörper 1 und sind mit ihrem anderen Ende jeweils mit einer Anschlußzunge 7, 8 gekoppelt.Furthermore, two contact pins 5, 6 are provided, around each of which one end of the coil wire 2 is wound. These contact pins 5, 6 are inserted at one end into the coil body 1 and are each coupled at their other end to a connecting tongue 7, 8.

Die beiden Anschlußzungen 7, 8 sind auf einem Anschlußzungenträger 9 angeordnet, der an einem Magnetjoch 10 der Magnetspule gehaltert ist.The two connecting tongues 7, 8 are arranged on a tongue carrier 9 which is held on a magnet yoke 10 of the magnet coil.

Die Anschlußzungen 7, 8 weisen zur Kopplung mit den Kontaktstiften 5, 6 Klemmittel auf, die einerseits eine elektrische Verbindung und andererseits eine Verschiebbarkeit der Anschlußzungen gegenüber den Kontaktstiften in dessen Längsrichtung gewährleisten. In dem in den Figuren dargestellten bevorzugten Ausführungsbeispiel erlauben diese Klemmittel ferner eine zusätzliche Relativverschiebbarkeit der Anschlußzungen gegenüber den Kontaktstiften quer zur Längsrichtung der Kontaktstifte.The connecting tongues 7, 8 have clamping means for coupling to the contact pins 5, 6, which on the one hand ensure an electrical connection and on the other hand a displaceability of the connecting tongues relative to the contact pins in the longitudinal direction thereof. In the preferred exemplary embodiment shown in the figures, these clamping means also allow the connecting tongues to be displaced relative to the contact pins transversely to the longitudinal direction of the contact pins.

Diese Klemmittel sind in dem dargestellten Ausführungsbeispiel als Schlitze 11, 12 in den Anschlußzungen 7, 8 ausgebildet, wobei die Kontaktstifte 5, 6 zwischen den den Schlitz 11, 12 begrenzenden Flanken 11a, 11b bzw. 12a, 12b gehaltert sind. Die beiden Flanken 11a, 11b bzw. 12a, 12b sind etwas aufgebogen, wobei die sich dadurch ergebende Schlitzweite etwas geringer ist als die Breite der vorzugsweise im Querschnitt viereckigen Kontaktstifte. Die beiden Flanken eines Schlitzes haben dabei federnde Wirkung, so daß beim Aufstecken auf einen Kontaktstift eine sichere elektrische Verbindung gewährleistet ist. Auch nach dem Aufstecken ist eine Verschiebbarkeit der Anschlußzungen in Längsrichtung der Kontaktstifte möglich (Doppelpfeil 13).In the exemplary embodiment shown, these clamping means are designed as slots 11, 12 in the connecting tongues 7, 8, the contact pins 5, 6 being held between the flanks 11a, 11b and 12a, 12b delimiting the slot 11, 12. The two flanks 11a, 11b and 12a, 12b are slightly bent, the resulting slot width being slightly smaller than the width of the contact pins, which are preferably square in cross section. The two flanks of a slot have a resilient effect, so that a secure electrical connection is ensured when plugged onto a contact pin. Even after plugging in, the connecting tongues can be moved in the longitudinal direction of the contact pins (double arrow 13).

Wie insbesondere aus Fig.4 zu ersehen ist, ermöglicht diese Art der Kopplung auch eine Relativbeweglichkeit quer zur Längsrichtung der Kontaktstifte, wie das durch den Doppelpfeil 14 angedeutet ist. Dabei findet eine Verschiebung der Kontaktstifte in Richtung der Schlitze 11, 12 statt.As can be seen in particular from FIG. 4, this type of coupling also enables a relative mobility transversely to the longitudinal direction of the contact pins, as is indicated by the double arrow 14. The contact pins are displaced in the direction of the slots 11, 12.

Die beiden Anschlußzungen 7, 8 sind auf dem in Fig.5 gezeigten Anschlußträger 9 angeordnet, wobei dieser Anschlußträger 9 zwei Schnapphaken 15, 16 aufweist, die mit dem Magnetjoch 10 koppelbar sind. Dabei wird gleichzeitig ein elektrischer Kontakt zwischen einer Masseanschlußzunge 17 und dem Magnetjoch 10 hergestellt. Während die einzelnen Anschlußzungen aus elektrisch leitendem Material, insbesondere Metall, bestehen, wird der Anschlußträger 9 aus nicht leitendem Material, vorzugsweise Kunststoff, hergestellt.The two connecting tongues 7, 8 are arranged on the connection carrier 9 shown in FIG. 5, this connection carrier 9 having two snap hooks 15, 16 which can be coupled to the magnetic yoke 10. At the same time, an electrical contact is made between a grounding tongue 17 and the magnetic yoke 10. While the individual connecting tongues consist of electrically conductive material, in particular metal, the connection carrier 9 is made of non-conductive material, preferably plastic.

In Fig.6 ist ein zweites erfindungsgemäßes Ausführungsbeispiel dargestellt, das sich von der bisher beschriebenen Variante lediglich dadurch unterscheidet, daß die Anschlußzungen 7, 8 nicht auf einem Anschlußträger angeordnet sind.6 shows a second exemplary embodiment according to the invention, which differs from the previously described variant only in that the connecting tongues 7, 8 are not arranged on a connecting carrier.

Im folgenden werden die einzelnen Verfahrensschritte bei der Herstellung der erfindungsgemäßen Magnetspulen näher erläutert:The individual process steps in the manufacture of the magnetic coils according to the invention are explained in more detail below:

In einem ersten Verfahrensschritt werden die beiden Enden des Spulendrahts 2 automatisiert auf je einen der beiden Kontaktstifte 5, 6 angewickelt. Anschließend werden die Kontaktstifte zur Entlastung des angewickelten Spulendrahts tiefer in den Spulenkörper 1 eingedrückt.In a first process step, the two ends of the coil wire 2 are automatically wound onto one of the two contact pins 5, 6. The contact pins are then pressed deeper into the coil body 1 in order to relieve the wound coil wire.

Nachdem der Spulendraht üblicherweise mit einer isolierenden Lackschicht überzogen ist, besteht in diesem Stadium der Herstellung noch keine elektrische Verbindung zwischen Spulendraht und Kontaktstift. Diese wird erfindungsgemäß nun dadurch hergestellt, daß das mit dem Spulendraht angewickelte Ende des Kontaktstiftes in ein Lotbad eingetaucht wird, das eine Temperatur von mehr als 350°C, vorzugsweise mehr als 450°C aufweist. Bei dieser Temperatur wird die Isolationsschicht des Spulendrahtes 2 aufgelöst und das Lot stellt eine elektrische Verbindung zwischen dem Spulendraht und dem Kontaktstift her.Since the coil wire is usually covered with an insulating varnish layer, there is still no electrical connection between the coil wire and the contact pin at this stage of manufacture. This is now produced according to the invention in that the end of the contact pin wound with the coil wire is immersed in a solder bath which has a temperature of more than 350 ° C., preferably more than 450 ° C. At this temperature, the insulation layer of the coil wire 2 is dissolved and the solder establishes an electrical connection between the coil wire and the contact pin.

In einem nächsten Arbeitsschritt werden die Anschlußzungen 7, 8 auf die Kontaktstifte 5, 6 aufgesteckt. In dem in den Fig.1 bis 5 beschriebenen Ausführungsbeispiel sind die Anschlußzungen am Anschlußträger gehaltert, so daß der Aufsteckvorgang für beide Anschlußzungen gleichzeitig stattfindet. Die Halterung des Anschlußträgers wird über die Schnapphaken 15, 16 sichergestellt.In a next step, the connecting tongues 7, 8 are plugged onto the contact pins 5, 6. In the exemplary embodiment described in FIGS. 1 to 5, the connecting tongues are held on the connecting carrier, so that the push-on operation for both connecting tongues takes place simultaneously. The holder of the connection carrier is ensured via the snap hooks 15, 16.

In einem letzten Arbeitsgang wird die Magnetspule in einer geeigneten Form mit Kunststoff ummantelt.In a final step, the magnetic coil is encased in a suitable form with plastic.

Die besondere Art der Kopplung von Kontaktstiften 5, 6 und Anschlußzungen 7, 8 ergibt eine relativ flexible Verbindung. Dadurch können die unvermeidlichen Relativbewegungen zwischen Anschlußzungen und Spule stattfinden, ohne daß dabei eine Relativbewegung zwischen Kontaktstift und Spule erfolgt. Diese unvermeidlichen Relativbewegungen treten insbesondere im letzten Verfahrensschritt, nämlich bei der Kunststoffummantelung 18, auf. Der äußerst dünne Spulendraht, der u.U. nur einen Durchmesser von 0,04 mm aufweist, ist somit wesentlich zuverlässiger vor einem Abreißen in diesem Verfahrensstadium geschützt.The special type of coupling of contact pins 5, 6 and connecting tongues 7, 8 results in a relatively flexible connection. As a result, the inevitable relative movements between the connecting tongues and the coil take place without a relative movement between the contact pin and the coil taking place. These inevitable relative movements occur in particular in the last method step, namely in the plastic casing 18. The extremely thin coil wire, which may only has a diameter of 0.04 mm, is thus protected much more reliably against tearing off at this stage of the process.

Zudem stellen die Art der Verbindung von Spulendraht 2 und Kontaktstiften 5, 6 einerseits und die Klemmittel der Anschlußzungen Mittel dar, die den Herstellungsvorgang an sich wesentlich vereinfachen. So kann insbesondere bei der Kontaktierung der Anschlußzungen auf einen Schweißvorgang verzichtet werden. So lassen sich die erfindungsgemäßen Magnetspulen nicht nur mit geringerem Aufwand sondern auch mit einer geringeren Ausschußquote herstellen.In addition, the type of connection of coil wire 2 and contact pins 5, 6, on the one hand, and the clamping means of the connecting tongues represent means which considerably simplify the manufacturing process itself. A welding process can thus be dispensed with, in particular when contacting the connecting tongues. Thus, the magnetic coils according to the invention can be produced not only with less effort but also with a lower reject rate.

Derartige Magnetspulen werden beispielsweise im Zusammenhang mit Magnetventilspulen eingesetzt, mit denen Ventile von Fluidleitungen gesteuert werden können.Solenoid coils of this type are used, for example, in connection with solenoid valve coils with which valves of fluid lines can be controlled.

Claims (7)

Magnetspule, bestehend aus - einem Spulenkörper (1) mit gewickeltem Spulendraht (2), dessen beide Enden nach außen geführt sind, - zwei Kontaktstiften (5, 6), die jeweils mit einem Ende des Spulendrahts (2) umwickelt sind, - zwei mit den Kontaktstiften (5, 6) koppelbare Anschlußzungen (7, 8) sowie - einer Kunststoffummantelung (18),
dadurch gekennzeichnet, daß - der auf den Kontaktstiften (5, 6) angewickelte Spulendraht (2) tauchgelötet ist und - die Anschlußzungen (7, 8) zur Kopplung mit den Kontaktstiften (5, 6) Klemmittel aufweisen, die einerseits eine elektrische Verbindung und andererseits eine Verschiebbarkeit der Anschlußzunge gegenüber dem Kontaktstift in dessen Längsrichtung gewährleisten. Magnetic coil consisting of - a coil former (1) with a wound coil wire (2), the two ends of which are led outwards, - two contact pins (5, 6), each of which is wrapped with one end of the coil wire (2), - Two with the contact pins (5, 6) connectable connecting tongues (7, 8) and - a plastic casing (18),
characterized in that - The coil wire (2) wound on the contact pins (5, 6) is dip-soldered and - The connecting tongues (7, 8) for coupling to the contact pins (5, 6) have clamping means which, on the one hand, ensure an electrical connection and, on the other hand, a displaceability of the connecting tongue with respect to the contact pin in its longitudinal direction. Magnetspule nach Anspruch 1, dadurch gekennzeichnet, daß die Klemmittel ferner eine Verschiebung der Anschlußzungen (7, 8) gegenüber den Kontaktstiften (5, 6) quer zur Längsrichtung der Kontaktstifte erlauben.Magnetic coil according to Claim 1, characterized in that the clamping means also allow the connecting tongues (7, 8) to be displaced with respect to the contact pins (5, 6) transversely to the longitudinal direction of the contact pins. Magnetspule nach Anspruch 1, dadurch gekennzeichnet, daß die Klemmittel durch einen Schlitz (11, 12) in der Anschlußzunge (7, 8) gebildet werden, wobei der Kontaktstift (5, 6) zwischen den den Schlitz begrenzenden Flanken (11a, 11b; 12a, 12b) gehaltert wird.Magnetic coil according to Claim 1, characterized in that the clamping means are formed by a slot (11, 12) in the connecting tongue (7, 8), the contact pin (5, 6) between the flanks (11a, 11b; 12a delimiting the slot) , 12b) is held. Magnetspule nach Anspruch 3, dadurch gekennzeichnet, daß die Flanken (11a, 11b; 12a, 12b) der Schlitze (11; 12) aufgebogen sind.Magnetic coil according to claim 3, characterized in that the flanks (11a, 11b; 12a, 12b) of the slots (11; 12) are bent. Magnetspule nach Anspruch 1, dadurch gekennzeichnet, daß die Anschlußzungen (7, 8) auf einem Anschlußzungenträger (9) vorgesehen sind, der an einem Magnetjoch (10) der Magnetspule mittels Schnapphaken (15, 16) gehaltert wird.Magnetic coil according to Claim 1, characterized in that the connecting tongues (7, 8) are provided on a connecting tongue carrier (9) which is held on a magnetic yoke (10) of the magnetic coil by means of snap hooks (15, 16). Verfahren zur Herstellung einer Magnetspule, gekennzeichnet durch die Kombination folgender Verfahrensschritte: - die Enden eines Spulendrahts (2) eines Spulenkörpers (1) werden automatisch auf je einem Kontaktstift (5, 6) angewickelt, - die Kontaktstifte (5, 6) werden zur Entlastung des angewickelten Spulendrahts (2) tiefer in den Spulenkörper (1) eingedrückt, - der angewickelte Spulendraht (2) wird tauchgelötet, - auf die Kontaktstifte (5, 6) werden Anschlußzungen (7, 8) derart aufgesteckt, daß einerseits eine elektrische Verbindung zwischen Kontaktstift und Anschlußzunge und andererseits eine Relativbeweglichkeit der Anschlußzunge (7, 8) in Längsrichtung des Kontaktstifts (5, 6) gewährleistet ist und - die Magnetspule wird mit Kunststoff ummantelt. Process for producing a magnetic coil, characterized by the combination of the following process steps: - The ends of a coil wire (2) of a coil body (1) are automatically wound onto a contact pin (5, 6), - The contact pins (5, 6) are pressed deeper into the coil body (1) to relieve the wound coil wire (2), - the wound coil wire (2) is dip-soldered, - On the contact pins (5, 6) connecting tongues (7, 8) are plugged in such a way that on the one hand an electrical connection between the contact pin and connecting tongue and on the other hand a relative mobility of the connecting tongue (7, 8) in the longitudinal direction of the contact pin (5, 6) is guaranteed and - The magnetic coil is covered with plastic. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß der angewickelte Spulendraht (2) in einem Lotbad mit einer Temperatur von mehr als 350°C, vorzugsweise mehr als 450°C, tauchgelötet wird.A method according to claim 6, characterized in that the wound coil wire (2) is dip-soldered in a solder bath at a temperature of more than 350 ° C, preferably more than 450 ° C.
EP97106396A 1996-06-05 1997-04-17 Magnet coil and method for manufacturing the same Expired - Lifetime EP0811995B1 (en)

Applications Claiming Priority (2)

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DE19622634 1996-06-05
DE19622634A DE19622634A1 (en) 1996-06-05 1996-06-05 Solenoid coil and process for its manufacture

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WO2001097236A1 (en) * 2000-06-14 2001-12-20 Robert Bosch Gmbh Two-part solenoid and method for the production thereof
EP1699059A2 (en) * 2005-03-03 2006-09-06 Nass Magnet GmbH Solenoid
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TW201019352A (en) * 2008-11-11 2010-05-16 Delta Electronics Inc Conductive winding and manufacturing method thereof
CN105761876B (en) * 2016-03-30 2017-08-01 北京航天发射技术研究所 A kind of sliding electromagnet and preparation method thereof
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DE59702045D1 (en) 2000-08-24
US6233814B1 (en) 2001-05-22
EP0811995B1 (en) 2000-07-19
DE19622634A1 (en) 1997-12-11

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