EP0610221B1 - Coil for an electromagnetic relay - Google Patents

Coil for an electromagnetic relay Download PDF

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Publication number
EP0610221B1
EP0610221B1 EP92918638A EP92918638A EP0610221B1 EP 0610221 B1 EP0610221 B1 EP 0610221B1 EP 92918638 A EP92918638 A EP 92918638A EP 92918638 A EP92918638 A EP 92918638A EP 0610221 B1 EP0610221 B1 EP 0610221B1
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EP
European Patent Office
Prior art keywords
coil
winding
coil tube
tube
pct
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 - Lifetime
Application number
EP92918638A
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German (de)
French (fr)
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EP0610221A1 (en
Inventor
Reinhold Lebschy
Josef Kern
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
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0610221A1 publication Critical patent/EP0610221A1/en
Application granted granted Critical
Publication of EP0610221B1 publication Critical patent/EP0610221B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • H01H2050/446—Details of the insulating support of the coil, e.g. spool, bobbin, former

Definitions

  • the invention relates to a coil for an electromagnetic relay with a coil body, which forms a coil tube, which is cylindrical in its basic form as a carrier for a winding package, and two flanges as respective axial boundaries of the winding space.
  • a round magnetic soft iron core is often used for flux guidance within the field winding, which is why the coil former, which is made of insulating material and carries the winding, also has a coil tube in the shape of a cylinder.
  • the winding made of thermoplastic coated copper round wires is applied to this coil tube under tension in the winding space between the two flanges, so that the winding package initially sits firmly and immovably on the coil tube.
  • the winding ends are connected, for example, to connecting wires in the coil flanges, with strain relief usually being provided so that the winding ends under tension do not tear under changes due to temperature or mechanical stress.
  • the winding package on the coil tube is loose and can be moved in the axial and radial directions. Due to additional external forces such as vibrations, shock loads and temperature changes, there is a risk of the winding wire ends between the winding and the connection ends being interrupted, which are, for example, firmly anchored in a coil former flange. Such vibrational stresses occur in particular then when a relay is installed in a moving device, for example in a motor vehicle.
  • the object of the invention is to design a coil of the type mentioned in such a way that such external forces cannot lead to displacements or twists of the winding, even when the winding package shrinks, and thus endanger the winding ends.
  • this object is achieved in that at least one projection engaging in the winding package is formed on the outer circumference of the coil tube.
  • a plurality of nose-shaped or conical projections is preferably arranged in a common radial plane distributed over the circumference of the coil tube. The arrangement of the projections in a single radial plane prevents stresses within the winding package from being caused by the projections.
  • the outer circumference of the coil tube has at least one flattened portion from which a protrusion in the form of a bead protrudes.
  • This bead can be formed, for example, as a continuation of the circular cross section of the other coil tube circumference.
  • the coil shown in FIGS. 1 and 2 has a coil body 1 which has a coil tube 2 and two flanges 3 and 4.
  • the coil tube 2 has a circular cross section and an inner bore for receiving an iron core, not shown.
  • a winding 5 made of thermoplastic coated copper wire is wound on the outer circumference of the coil tube 2. The beginning of the winding 6 is first fastened to a connecting pin 7 which is anchored in the coil flange 3.
  • a compact winding package 5 is formed by baking the wire insulation, which can sit loosely on the coil tube 2 after a certain time.
  • the coil tube 2 has conical knobs 8, which are arranged near the start of the winding 6 on a common radial plane. These knobs 8 already drill into the winding package from the inside when the winding is applied and thus prevent later movement. Since the knobs 8 are in the vicinity of the coil flange 3, the shrinking winding package is pulled in the direction of the end of the winding 6 at risk, so that stress in the longitudinal direction is avoided.
  • FIGS. 3 and 4 A somewhat modified embodiment is shown in FIGS. 3 and 4.
  • a coil former 11 has a coil tube 12 with flanges 13 and 14.
  • a winding 15 is applied to the coil tube, with a winding start 16 being fastened to a connecting pin 17 in the coil flange 13.
  • the coil tube 12 has lateral flats 18, so that the winding package 15, which is adapted to the outer circumference of the coil tube, cannot be rotated on the coil tube even with a certain shrinkage.
  • the flattening 18 is interrupted in each case by a bead 19 in the vicinity of the start of the winding 16, in which case the bead is designed as a continuation of the circular jacket surface of the coil tube 12.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Breakers (AREA)
  • Burglar Alarm Systems (AREA)
  • Magnetic Treatment Devices (AREA)
  • Insulating Of Coils (AREA)
  • Coil Winding Methods And Apparatuses (AREA)

Abstract

PCT No. PCT/DE92/00737 Sec. 371 Date Apr. 28, 1994 Sec. 102(e) Date Apr. 28, 1994 PCT Filed Sep. 3, 1992 PCT Pub. No. WO93/09556 PCT Pub. Date May 13, 1993.The coil has a coil former having an essentially cylindrical coil tube (2) as a support for a winding (5). Arranged on the external circumference of the coil tube are tab-shaped projections (8) which extend into the winding stack (5) and prevent twisting and axial movement in the event of the winding shrinking.

Description

Die Erfindung betrifft eine Spule für ein elektromagnetisches Relais mit einem Spulenkörper, der ein in seiner Grundform zylindrisches Spulenrohr als Träger für ein Wicklungspaket sowie zwei Flansche als jeweilige axiale Begrenzungen des Wickelraumes bildet.The invention relates to a coil for an electromagnetic relay with a coil body, which forms a coil tube, which is cylindrical in its basic form as a carrier for a winding package, and two flanges as respective axial boundaries of the winding space.

Bei elektromagnetischen Relais wird häufig innerhalb der Erregerwicklung ein runder Magnetweicheisen-Kern zur Flußführung eingesetzt, weshalb der aus Isolierstoff bestehende und die Wicklung tragende Spulenkörper ebenfalls ein Spulenrohr in Zylinderform aufweist. Auf dieses Spulenrohr wird in den Wicklungsraum zwischen beiden Flanschen die Wicklung aus thermoplastisch umhüllten Kupfer-Runddrähten unter Zug aufgebracht, so daß das Wicklungspaket zunächst fest und unbeweglich auf dem Spulenrohr sitzt. Die Wicklungsenden werden beispielsweise mit Anschlußdrähten in den Spulenflanschen verbunden, wobei üblicherweise eine Zugentlastung vorgesehen wird, damit die unter Zug stehenden Wicklungsenden bei temperaturbedingten oder durch mechanische Beanspruchung entstehenden Veränderungen nicht reißen.In the case of electromagnetic relays, a round magnetic soft iron core is often used for flux guidance within the field winding, which is why the coil former, which is made of insulating material and carries the winding, also has a coil tube in the shape of a cylinder. The winding made of thermoplastic coated copper round wires is applied to this coil tube under tension in the winding space between the two flanges, so that the winding package initially sits firmly and immovably on the coil tube. The winding ends are connected, for example, to connecting wires in the coil flanges, with strain relief usually being provided so that the winding ends under tension do not tear under changes due to temperature or mechanical stress.

Durch Temperatur- und Zeiteinflüsse schrumpft jedoch die Wicklung als Folge einer Schrumpfung der Drahtisolierung, und das bedeutet, daß der Außendurchmesser und die Länge der Wicklung kleiner, der Innendurchmesser jedoch größer wird. Dadurch wird das Wicklungspaket auf dem Spulenrohr lose und ist in axialer und radialer Richtung bewegbar. Durch zusätzliche Krafteinwirkungen von außen, wie Schwingungen, Schockbeanspruchung und Temperaturwechsel, besteht die Gefahr einer Unterbrechung der Wickeldrahtenden zwischen der Wicklung und den Anschlußenden, die beispielsweise fest in einem Spulenkörperflansch verankert sind. Solche Schwingungsbeanspruchungen treten insbesondere dann auf, wenn ein Relais in einem bewegten Gerät, beispielsweise in einem Kraftfahrzeug, eingebaut ist.However, the winding shrinks due to temperature and time influences as a result of a shrinkage of the wire insulation, and this means that the outside diameter and the length of the winding become smaller, but the inside diameter becomes larger. As a result, the winding package on the coil tube is loose and can be moved in the axial and radial directions. Due to additional external forces such as vibrations, shock loads and temperature changes, there is a risk of the winding wire ends between the winding and the connection ends being interrupted, which are, for example, firmly anchored in a coil former flange. Such vibrational stresses occur in particular then when a relay is installed in a moving device, for example in a motor vehicle.

Aufgabe der Erfindung ist es, eine Spule der eingangs genannten Art so zu gestalten, daß derartige äußere Krafteinwirkungen auch bei einem Schrumpfen des Wicklungspaketes nicht zu Verschiebungen oder Verdrehungen der Wicklung und damit zu einer Gefährdung der Wicklungsenden führen können.The object of the invention is to design a coil of the type mentioned in such a way that such external forces cannot lead to displacements or twists of the winding, even when the winding package shrinks, and thus endanger the winding ends.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß auf dem Außenumfang des Spulenrohres mindestens ein in das Wicklungspaket eingreifender Vorsprung ausgebildet ist. Vorzugsweise wird eine Mehrzahl von nasenförmigen oder kegelförmigen Vorsprüngen in einer gemeinsamen radialen Ebene über den Umfang des Spulenrohres verteilt angeordnet. Durch die Anordnung der Vorsprünge in einer einzigen radialen Ebene wird vermieden, daß Spannungen innerhalb des Wicklungspaketes durch die Vorsprünge hervorgerufen werden. Weiterhin ist es zweckmäßig, den Vorsprung oder die Vorsprünge in der Nähe desjenigen Spulenflansches anzuordnen, an dem die Wicklungsanfänge bzw. -enden befestigt sind. Damit wird sichergestellt, daß eine schrumpfende Wicklung in die Richtung des gefährdeten Wicklungsanfanges gezogen und somit dessen Beanspruchung in Längsrichtung vermieden wird.According to the invention, this object is achieved in that at least one projection engaging in the winding package is formed on the outer circumference of the coil tube. A plurality of nose-shaped or conical projections is preferably arranged in a common radial plane distributed over the circumference of the coil tube. The arrangement of the projections in a single radial plane prevents stresses within the winding package from being caused by the projections. Furthermore, it is expedient to arrange the projection or the projections in the vicinity of the coil flange to which the winding starts or ends are fastened. This ensures that a shrinking winding is pulled in the direction of the end of the winding at risk and thus its stress in the longitudinal direction is avoided.

Anstelle von Vorsprüngen aus einer durchgehend kreisförmigen Mantelfläche heraus kann auch vorgesehen werden, daß der Außenumfang des Spulenrohres mindestens eine Abflachung aufweist, aus der ein Vorsprung in Form einer Wulst hervorsteht. Diese Wulst kann beispielsweise als Fortsetzung des Kreisquerschnittes des sonstigen Spulenrohrumfanges ausgebildet sein.Instead of protrusions from a continuously circular outer surface, it can also be provided that the outer circumference of the coil tube has at least one flattened portion from which a protrusion in the form of a bead protrudes. This bead can be formed, for example, as a continuation of the circular cross section of the other coil tube circumference.

Die Erfindung wird nachfolgend an Ausführungsbeispielen anhand der Zeichnung näher erläutert. Es zeigt

  • Figur 1 und 2 einen Spulenkörper mit angedeuteter Wicklung in teilweise geschnittener Seitenansicht sowie im Querschnitt,
  • Figur 3 und 4 eine weitere Ausführungsform eines Spulenkörpers in perspektivischer Schnittdarstellung sowie in Seitenansicht.
The invention is explained in more detail below using exemplary embodiments with reference to the drawing. It shows
  • 1 and 2 a coil former with indicated winding in a partially sectioned side view and in cross section,
  • Figures 3 and 4, a further embodiment of a coil body in a perspective sectional view and in side view.

Die in den Figuren 1 und 2 gezeigte Spule besitzt einen Spulenkörper 1, der ein Spulenrohr 2 sowie zwei Flansche 3 und 4 besitzt. Das Spulenrohr 2 besitzt einen kreisrunden Querschnitt und eine Innenbohrung zur Aufnahme eines nicht dargestellten Eisenkerns. Auf den Außenumfang des Spulenrohrs 2 wird eine Wicklung 5 aus thermoplastisch umhülltem Kupferdraht gewickelt. Dabei wird der Wicklungsanfang 6 zunächst an einem Anschlußstift 7 befestigt, der in dem Spulenflansch 3 verankert ist.The coil shown in FIGS. 1 and 2 has a coil body 1 which has a coil tube 2 and two flanges 3 and 4. The coil tube 2 has a circular cross section and an inner bore for receiving an iron core, not shown. A winding 5 made of thermoplastic coated copper wire is wound on the outer circumference of the coil tube 2. The beginning of the winding 6 is first fastened to a connecting pin 7 which is anchored in the coil flange 3.

Durch Temperatureinflüsse und Alterung entsteht durch Verbakken der Drahtisolierung ein kompaktes Wicklungspaket 5, das nach einer gewissen Zeit lose auf dem Spulenrohr 2 sitzen kann. Um dabei eine Verdrehung oder eine Axialbewegung zu vermeiden, besitzt das Spulenrohr 2 kegelförmige Noppen 8, die in der Nähe des Wicklungsanfangs 6 auf einer gemeinsamen radialen Ebene angeordnet sind. Diese Noppen 8 bohren sich bereits beim Aufbringen der Wicklung von innen in das Wicklungspaket und verhindern somit eine spätere Bewegung. Da die Noppen 8 in der Nähe des Spulenflansches 3 liegen, wird das schrumpfende Wicklungspaket in die Richtung des gefährdeten Wicklungsanfangs 6 gezogen, so daß eine Beanspruchung in Längsrichtung vermieden wird.Due to temperature influences and aging, a compact winding package 5 is formed by baking the wire insulation, which can sit loosely on the coil tube 2 after a certain time. In order to avoid twisting or axial movement, the coil tube 2 has conical knobs 8, which are arranged near the start of the winding 6 on a common radial plane. These knobs 8 already drill into the winding package from the inside when the winding is applied and thus prevent later movement. Since the knobs 8 are in the vicinity of the coil flange 3, the shrinking winding package is pulled in the direction of the end of the winding 6 at risk, so that stress in the longitudinal direction is avoided.

In den Figuren 3 und 4 ist eine etwas abgewandelte Ausführungsform gezeigt. Ein Spulenkörper 11 besitzt in diesem Fall ein Spulenrohr 12 mit Flanschen 13 und 14. Auf dem Spulenrohr ist eine Wicklung 15 aufgebracht, wobei ein Wicklungsanfang 16 an einem Anschlußstift 17 im Spulenflansch 13 befestigt ist.A somewhat modified embodiment is shown in FIGS. 3 and 4. In this case, a coil former 11 has a coil tube 12 with flanges 13 and 14. A winding 15 is applied to the coil tube, with a winding start 16 being fastened to a connecting pin 17 in the coil flange 13.

Das Spulenrohr 12 besitzt in diesem Fall seitliche Abflachungen 18, so daß das an den Außenumfang des Spulenrohrs angepaßte Wicklungspaket 15 auch bei einer gewissen Schrumpfung nicht auf dem Spulenrohr verdreht werden kann. Um auch eine Axialverschiebung des Wicklungspaketes 15 zu verhindern, ist die Abflachung 18 jeweils durch eine Wulst 19 in der Nähe des Wicklungsanfangs 16 unterbrochen, wobei die Wulst in diesem Fall als Fortsetzung der Kreismantelfläche des Spulenrohres 12 ausgebildet ist.In this case, the coil tube 12 has lateral flats 18, so that the winding package 15, which is adapted to the outer circumference of the coil tube, cannot be rotated on the coil tube even with a certain shrinkage. To an axial shift too to prevent the winding package 15, the flattening 18 is interrupted in each case by a bead 19 in the vicinity of the start of the winding 16, in which case the bead is designed as a continuation of the circular jacket surface of the coil tube 12.

Claims (5)

  1. Coil for an electromagnetic relay having a coil former (1; 11) which forms a coil tube (2; 12), whose basic shape is cylindrical, as a support for a winding stack (5; 15) as well as two flanges (3, 4; 13, 14) as axial boundaries of the winding space in each case, characterized in that at least one projection (8; 19), which engages in the winding stack, is constructed on the external circumference of the coil tube (2; 12).
  2. Coil according to Claim 1, characterized in that a plurality of tab-shaped projections (8) are distributed over the circumference of the coil tube (2) in a common radial plane.
  3. Coil according to Claim 1, characterized in that the external circumference of the coil tube (12) has at least one flat (18), a bead (19) projecting from the flat as a projection.
  4. Coil according to Claim 3, characterized in that the bead (19) is constructed as a continuation of the circular cross-section of the coil tube circumference.
  5. Coil according to one of Claims 1 to 4, characterized in that the projection or the projections (8; 19) are in each case arranged in the vicinity of that flange (3; 13) to which the winding start (6; 16) is attached.
EP92918638A 1991-10-31 1992-09-03 Coil for an electromagnetic relay Expired - Lifetime EP0610221B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4136005A DE4136005C1 (en) 1991-10-31 1991-10-31
DE4136005 1991-10-31
PCT/DE1992/000737 WO1993009556A1 (en) 1991-10-31 1992-09-03 Coil for an electromagnetic relay

Publications (2)

Publication Number Publication Date
EP0610221A1 EP0610221A1 (en) 1994-08-17
EP0610221B1 true EP0610221B1 (en) 1995-11-22

Family

ID=6443884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92918638A Expired - Lifetime EP0610221B1 (en) 1991-10-31 1992-09-03 Coil for an electromagnetic relay

Country Status (8)

Country Link
US (1) US5521574A (en)
EP (1) EP0610221B1 (en)
AT (1) ATE130700T1 (en)
CA (1) CA2122447A1 (en)
DE (2) DE4136005C1 (en)
PT (1) PT101018A (en)
SI (1) SI9200202A (en)
WO (1) WO1993009556A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69625390T3 (en) * 1995-06-19 2009-11-26 DENSO CORPORATION, Kariya-shi Electromagnetic coil
DE19541447A1 (en) * 1995-11-07 1997-05-15 Peter Weiner Bobbin
JP4706736B2 (en) * 2008-08-12 2011-06-22 Ｔｄｋ株式会社 Coil bobbins, coil windings, and coil components
DE102018103304A1 (en) * 2018-02-14 2019-08-14 Aumann Espelkamp Gmbh Device and method for producing a coil winding for a baked-enamel bobbin

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1456108A (en) * 1923-05-22 Coil and spool construction
US1550189A (en) * 1924-02-13 1925-08-18 Gen Electric Spool for magnet coils
NL298206A (en) * 1963-09-20 1900-01-01
US3328736A (en) * 1965-03-12 1967-06-27 Western Electric Co Bobbin and terminal structures for electrical coils
US3480229A (en) * 1967-06-08 1969-11-25 Gen Electric Coil winding form
US3559134A (en) * 1967-08-08 1971-01-26 Westinghouse Electric Corp Random wound encapsulated coil construction
FR2181464B1 (en) * 1972-04-25 1976-08-06 Barthalon Maurice

Also Published As

Publication number Publication date
DE4136005C1 (en) 1992-10-29
WO1993009556A1 (en) 1993-05-13
ATE130700T1 (en) 1995-12-15
DE59204448D1 (en) 1996-01-04
SI9200202A (en) 1993-06-30
US5521574A (en) 1996-05-28
PT101018A (en) 1994-06-30
CA2122447A1 (en) 1993-05-13
EP0610221A1 (en) 1994-08-17

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