EP0143023B1 - Casing for the magnetic circuit of ignition transformers for vehicles and method for manufacturing the same - Google Patents

Casing for the magnetic circuit of ignition transformers for vehicles and method for manufacturing the same Download PDF

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Publication number
EP0143023B1
EP0143023B1 EP19840401999 EP84401999A EP0143023B1 EP 0143023 B1 EP0143023 B1 EP 0143023B1 EP 19840401999 EP19840401999 EP 19840401999 EP 84401999 A EP84401999 A EP 84401999A EP 0143023 B1 EP0143023 B1 EP 0143023B1
Authority
EP
European Patent Office
Prior art keywords
magnetic circuit
tongue
lugs
strap
sheets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19840401999
Other languages
German (de)
French (fr)
Other versions
EP0143023A1 (en
Inventor
Jean Claude Bonnefoy
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.)
Ducellier et Cie
Original Assignee
Ducellier et Cie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ducellier et Cie filed Critical Ducellier et Cie
Publication of EP0143023A1 publication Critical patent/EP0143023A1/en
Application granted granted Critical
Publication of EP0143023B1 publication Critical patent/EP0143023B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together

Definitions

  • the present invention relates to a clamp for holding the magnetic circuit of an ignition coil, in particular for a motor vehicle of the type known as a closed circuit generally constituted by two packs of stacked exposed sheets, of complementary shapes and held face to face by mechanical means. of connection and maintenance.
  • Such magnetic circuits may have a rectangular parallelepiped external shape, the apparent outline of which is defined by the four edges of the parallelepiped must be protected from the action of shocks and external aggressive agents.
  • the object of the present invention is to avoid these drawbacks while ensuring positive protection of the magnetic circuit.
  • the means for protecting the sheets simultaneously maintain them also.
  • These means are constituted by a metal band enveloping the four edges of the magnetic circuit and comprising two symmetrical and complementary flanges 3 and 4 obtained from a blank of galvanized sheet.
  • flanges 3 and 4 are each obtained during a same cutting operation with complementary locking means formed at one end by a tongue 5 and at the other end a clip constituted by two legs 6 separated by a recess 7 correspond cutting and spacing the legs 6.
  • the flanges 3 and 4 are folded longitudinally in the form of a gutter according to the thickness of the sheet metal packages 1 and 2 then the ends are folded down substantially at right angles to different lengths so as to define between them a length corresponding to that of one side of the parallelogram.
  • each flange 3,4 thus formed is then slipped one of the packets of sheets 1, 2.
  • the two sets 1, 3 and 2,4 formed by a flange and a packet of sheets are presented face to face, the tongue 5 a flange slid between the tabs 6 of the clip of the other flange.
  • the tabs 6 are then folded down and stamp the corresponding part of the tongue 5 in the recess 7.
  • the strapping to a spreader limited to two flange sheet thicknessers.
  • the cheeks 3a and 4c of the gutters are well pressed against the sides of the outer sheets of the packets of sheets 1 and 2.
  • the embodiment shown in Figure 4 differs essentially from the previous in that the strapping is obtained from a single flange 9 obtained as previously by cutting a metal blank, subsequently shaped around the packets of sheets 1 and 2 to be assembled, months of which the locking means, identical in the foregoing, are arranged at each end and 9b of the single flange 9 to close it on itself, preferably on top of the magnetic circuit, for a single locking operation.
  • tongue 5 can be straight in shape as shown, but can also end in T.
  • an effective clamping and tightening of the sheets is thus obtained so as to suppress the noise of the magnetic circuit, a mechanical protection of the sheet edges against corrosion and oxidation, with a space requirement at the level of the stapling limited to two thicknesses of flange plate.
  • Such a realization also has the advantage of requiring only a single cutting tool in both cases and of ensuring significant guidance of the sheet metal packages during assembly thanks to more contact plane.
  • stapling means are given by way of example but that they could be replaced, if necessary, by hinges or dovetail systems, for example each flange comprising the complementary locking means of in addition, the material used could be bichromated zinc-plated sheet or material with equivalent properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Package Frames And Binding Bands (AREA)
  • Clamps And Clips (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Non-Reversible Transmitting Devices (AREA)
  • Connection Of Plates (AREA)

Description

La présente invention concerne une bride de maintien du circuit magnétique d'une bobine d'allumage notamment pour véhicule automobile du type dit à circuit fermé généralement constitué par deux paquets de tôles apparentes empilées, de formes complémentaires et maintenus face à face par des moyens mécaniques de liaison et de maintien.The present invention relates to a clamp for holding the magnetic circuit of an ignition coil, in particular for a motor vehicle of the type known as a closed circuit generally constituted by two packs of stacked exposed sheets, of complementary shapes and held face to face by mechanical means. of connection and maintenance.

De tels circuits magnétiques peuvent avoir une forme extérieure parallélépipédique rectangulaire dont il est nécessaire d'en protéger le contour apparent défini par les quatre chants du parallélépipède, contre l'action des chocs et des agents agressifs extérieurs.Such magnetic circuits may have a rectangular parallelepiped external shape, the apparent outline of which is defined by the four edges of the parallelepiped must be protected from the action of shocks and external aggressive agents.

Cette protection des chants pourrait être obtenue de manière évidente et connue par l'application d'une couche de peinture protectrice, mais cette technique entraînerait des manipulations jugées onéreuses et de plus ne serait pas efficace contre l'action des chocs mécaniques.This edge protection could be obtained in an obvious and known manner by the application of a layer of protective paint, but this technique would involve manipulations deemed expensive and moreover would not be effective against the action of mechanical shock.

La présente invention a pour but d'éviter ces inconvénients tout en assurant une protection positive du circuit magnétique.The object of the present invention is to avoid these drawbacks while ensuring positive protection of the magnetic circuit.

Elle concerne à cet effet une bride de maintien du circuit magnétique d'une bobine d'allumage, notamment pour véhicule automobile du type dit à circuit fermé constitué par deux paquets de tôles, caractérisé en ce qu'elle se présente sous la forme d'une gouttière périphérique dont les joues latérales parallèles entourent et chevauchent les chants des paquets de tôles constituant le circuit magnétique, laquelle bride comporte des moyens de verrouillage qui lui sont propres constitués par au moins une languette et une agrafe correspondante entre les pattes rabattables de laquelle est disposée et verrouillée ladite languette. Selon une autre caractéristique de l'invention le procédé d'obtention de la bride consiste à découper la bride dans un flan métallique, dans la même opération de découpe duquel sont réalisés les moyens de verrouillage, puis ultérieurement à conformer le flan métallique autour des paquets de tôles de manière à les chevaucher par des joues latérales parallèles et enfin, après avoir disposé la languette entre les pattes de l'agrafe, à rabattre lesdites pattes sur la languette de manière à la déformer par estompage dans le logement résultant de la découpe et du rabat desdites pattes. La description qui va suivre en regard des figures annexées fera mieux comprendre comment l'invention peut être réalisée.

  • La figure 1 est une vue en perspective d'un circuit magnétique assemblé par deux brides complémentaires conformement à l'invention.
  • La figure 2 représente en perspective le système d'agrafage avant assemblage.
  • La figure 3 représente le système d'agrafage en coupe après assemblage.
  • La figure 4 est une vue en perspective d'un circuit magnétique assemblé par une bride unique selon un autre mode de réalisation A titre d'exemple le circuit magnétique est constitué de deux paquets de tôles similaires aux tolérances près quant au nombre de tôles constituant chaque paquet. Chaque tôle est découpée en forme de E dont la branche centrale est un peu plus courte afin qu'après assemblage reste un entrefer dans le noyau créé por les deux branches centrales. Les autres parties du E définissent une farme extérieure parallélépipédique rectangulaire dont les chants des tôles découpées sont apparents, et doivent être protégés notamment contre la corrosion et l'oxydation.
To this end, it relates to a flange for holding the magnetic circuit of an ignition coil, in particular for a motor vehicle of the so-called closed circuit type consisting of two packets of sheets, characterized in that it is in the form of a peripheral gutter whose parallel side cheeks surround and overlap the edges of the sheet metal bundles constituting the magnetic circuit, which flange comprises locking means which are specific to it constituted by at least one tongue and a corresponding clip between the folding tabs of which is disposed and locked said tab. According to another characteristic of the invention, the method for obtaining the flange consists in cutting the flange in a metal blank, in the same cutting operation from which the locking means are produced, then subsequently in shaping the metal blank around the packages. sheets so as to overlap them by parallel lateral cheeks and finally, after having placed the tongue between the tabs of the clip, folding said tabs onto the tongue so as to deform it by blurring in the housing resulting from the cutting and of the flap of said legs. The description which follows with reference to the appended figures will make it easier to understand how the invention can be implemented.
  • Figure 1 is a perspective view of a magnetic circuit assembled by two complementary flanges according to the invention.
  • Figure 2 shows in perspective the stapling system before assembly.
  • Figure 3 shows the stapling system in section after assembly.
  • FIG. 4 is a perspective view of a magnetic circuit assembled by a single flange according to another embodiment. For example, the magnetic circuit consists of two bundles of sheets similar to the tolerances close to the number of sheets constituting each package. Each sheet is cut into an E shape, the central branch of which is a little shorter so that after assembly there remains an air gap in the core created by the two central branches. The other parts of the E define a rectangular parallelepiped external shell whose edges of the cut sheets are visible, and must be protected in particular against corrosion and oxidation.

Conformément à l'invention les moyens de protection des tôles assurent simultanément leur maintien également. Ces moyens somt constitués par un cerclage métallique enveloppant les quatre chants du circuit magnétique et comportant deux brides 3 et 4 symétriques et complémentaires obtenues à partir d'un flan de tôle galvanisée.In accordance with the invention, the means for protecting the sheets simultaneously maintain them also. These means are constituted by a metal band enveloping the four edges of the magnetic circuit and comprising two symmetrical and complementary flanges 3 and 4 obtained from a blank of galvanized sheet.

Ces brides 3 et 4 sont obtenues chacune au cours d'une même opération de découpe avec des moyens de verrouillage complémentaires formés à une extrémité par une languette 5 et à l'autre extrémité une agrafe constituée par deux pattes 6 séparées par un évidement 7 correspondont au découpage et à l'écartement des pattes 6. Après cette unique opération de découpe les brides 3 et 4 sont pliées longitudinalement en forme de gouttière selon l'épaisseur des paquets de tôles 1 et 2 puis les extrémités sont rabattues sensiblement à angle droit selon des longueurs différentes de façon à définir entre elles une longueur correspondante à celle d'un côté du parallélogramme.These flanges 3 and 4 are each obtained during a same cutting operation with complementary locking means formed at one end by a tongue 5 and at the other end a clip constituted by two legs 6 separated by a recess 7 correspond cutting and spacing the legs 6. After this single cutting operation the flanges 3 and 4 are folded longitudinally in the form of a gutter according to the thickness of the sheet metal packages 1 and 2 then the ends are folded down substantially at right angles to different lengths so as to define between them a length corresponding to that of one side of the parallelogram.

Dans chaque bride 3,4 ainsi formée est ensuite glissé un des paquets de tôles 1, 2. Ainsi équipés les deux ensembles 1, 3 et 2,4 formés par une bride et un paquet de tôles sont présentés face à face, la languette 5 d'une bride glissée entre les pattes 6 de l'agrafe de l'autre bride. Les pattes 6 sont ensuite rabattues et estampent la partie correspondante de la languette 5 dans l'évidement 7. Ainsi au niveau de l'agrafage, le cerclage à une épasseur limitée à deux épasseurs de tôle de bride. Les joues 3a et 4c des gouttières sont bien plaquées contre les flancs des tôles extérieures des paquets de tôles 1 et 2.In each flange 3,4 thus formed is then slipped one of the packets of sheets 1, 2. Thus equipped the two sets 1, 3 and 2,4 formed by a flange and a packet of sheets are presented face to face, the tongue 5 a flange slid between the tabs 6 of the clip of the other flange. The tabs 6 are then folded down and stamp the corresponding part of the tongue 5 in the recess 7. Thus at the stapling, the strapping to a spreader limited to two flange sheet thicknessers. The cheeks 3a and 4c of the gutters are well pressed against the sides of the outer sheets of the packets of sheets 1 and 2.

Afin que le serrage des paquets de tôles soit effectif lors du plaquage des joues 3a et 4a, en tenant compte des différences d'épaisseurs tolérées entre les deux paquets de tôles 1 et 2 les branches portant les languettes 5 de chaque bride comportent dans leurs joues une fente 8 qui se trouve située, après assemblage, au niveau de la jonction des branches des paquets de tôles 1 et 2. Le mode de réalisation représenté à la figure 4 diffère essentiellement du précédent en ce que le cerclage est obtenu à partir d'une bride unique 9 obtenue comme précedemment par découpe d'un flan métallique, ultérieurement conformé autour des paquets de tôles 1 et 2 à assembler, mois dont les moyens de verrouillage, identiques aux précedents, sont disposés à chaque extrémité et 9b de la bride unique 9 pour la fermer sur elle même, de préférence sur le dessus du circuit magnétique, por une seule opération de verrouillage.So that the tightening of the packets of sheets is effective during the plating of the cheeks 3a and 4a, taking into account the differences in thickness tolerated between the two packets of sheets 1 and 2 the branches carrying the tongues 5 of each flange have in their cheeks a slot 8 which is located, after assembly, at the junction of the branches of the packets of sheets 1 and 2. The embodiment shown in Figure 4 differs essentially from the previous in that the strapping is obtained from a single flange 9 obtained as previously by cutting a metal blank, subsequently shaped around the packets of sheets 1 and 2 to be assembled, months of which the locking means, identical in the foregoing, are arranged at each end and 9b of the single flange 9 to close it on itself, preferably on top of the magnetic circuit, for a single locking operation.

Il est évident que la languette 5 peut être de forme droite comme représentée, mais également se terminer en T.It is obvious that the tongue 5 can be straight in shape as shown, but can also end in T.

Dans ces deux modes de réalisation il est ainsi obtenu un bridage effectif et un serrage des tôles tel à supprimer le bruit du circuit magnétique, une protection mécanique des chants de tôle contre la corrosion et l'oxydation, avec un encombrement au niveau de l'agrafage limité à deux épaisseurs de tôle de bride.In these two embodiments, an effective clamping and tightening of the sheets is thus obtained so as to suppress the noise of the magnetic circuit, a mechanical protection of the sheet edges against corrosion and oxidation, with a space requirement at the level of the stapling limited to two thicknesses of flange plate.

Une telle réalisotion a aussi l'avantage de ne nécessiter que d'un seul outil de découpe dans les deux cas et d'assurer un guidage important des paquets de tôles pendant l'assemblage grâce à plus de plan de contact.Such a realization also has the advantage of requiring only a single cutting tool in both cases and of ensuring significant guidance of the sheet metal packages during assembly thanks to more contact plane.

Il est bien évident que les moyens d'agrafage sont données à titre d'exemple mais qu'ils pourraient être remplacés, si nécessaire, par des charnières ou des systèmes à queue d'aronde par exemple chaque bride comportant les moyens de verrouillage complémentaires de l'outre de plus le matériau utilisé pourrait être en tôle zinquée bichromatée ou en matériau aux propriétés équivalentes.It is obvious that the stapling means are given by way of example but that they could be replaced, if necessary, by hinges or dovetail systems, for example each flange comprising the complementary locking means of in addition, the material used could be bichromated zinc-plated sheet or material with equivalent properties.

Claims (2)

1. Strap for maintaining the magnetic circuit of an ignition coil, especially for an automobile vehicle, of the type referred to as including a closed loop formed by two sets of metal sheets (1 and 2), characterised in that it is provided in the form of a peripheral channel, the parallel lateral cheeks (3a, 4a) of which surround and straddle the edges of the sets of metal sheets (1 and 2) forming the magnetic circuit, which strap comprises locking means which are formed therewith and which comprise at least one tongue (5) and a corresponding clip, between the foldable lugs (6) of which the said tongue (5) is disposed and locked.
2. Process for obtaining the maintaining strap according to claim 1, which consists in cutting out the strap (3-4, 9) in a metal blank, the locking means (5, 6 and 7) being formed in the same operation of cutting out the said blank, and then in subsequently shaping the metal blank around the sets of metal sheets (1 and 2) in such a manner as to straddle them by parallel lateral cheeks (3a,4a) and finally, after having located the tongue (5) between the lugs (6) of the clip, in folding over the said lugs (6) onto the tongue in such a manner as to deform the latter by merging into the recess (7) resulting from the cutting-out and the folding-over of the said lugs (6).
EP19840401999 1983-11-24 1984-10-05 Casing for the magnetic circuit of ignition transformers for vehicles and method for manufacturing the same Expired EP0143023B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8318703A FR2555671B1 (en) 1983-11-24 1983-11-24 MAGNETIC CIRCUIT FOR IGNITION COIL
FR8318703 1983-11-24

Publications (2)

Publication Number Publication Date
EP0143023A1 EP0143023A1 (en) 1985-05-29
EP0143023B1 true EP0143023B1 (en) 1987-09-23

Family

ID=9294465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840401999 Expired EP0143023B1 (en) 1983-11-24 1984-10-05 Casing for the magnetic circuit of ignition transformers for vehicles and method for manufacturing the same

Country Status (9)

Country Link
EP (1) EP0143023B1 (en)
BG (1) BG41479A3 (en)
DE (1) DE3466449D1 (en)
ES (1) ES288115Y (en)
FR (1) FR2555671B1 (en)
HU (1) HU190656B (en)
PT (1) PT79401B (en)
RO (1) RO91030B (en)
YU (1) YU196584A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3727458A1 (en) * 1987-08-18 1989-03-02 Bayerische Motoren Werke Ag IGNITION UNIT FOR COMBUSTION ENGINES
US5861792A (en) * 1993-02-19 1999-01-19 Matsushita Electric Industrial Co., Ltd. Coil component and method of stamping iron core used therefor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959033C (en) * 1952-05-16 1957-02-28 Gen Electric Choke coil with a jacket core
FR1180873A (en) * 1956-08-06 1959-06-10 American Mach & Foundry Electromagnetic inductor
DE1192759B (en) * 1958-07-24 1965-05-13 Siemens Ag Cut ribbon core made of several partial cores
US3348276A (en) * 1965-10-01 1967-10-24 Automatic Elect Lab Core cup retaining device
US4024486A (en) * 1975-07-14 1977-05-17 General Electric Company Outer locking turn for precut core
FR2438327A1 (en) * 1978-07-03 1980-04-30 Gantar Janez Transformer cores mounting assembly - has two U=shaped brackets bolted together and with dimples for securing cores in position

Also Published As

Publication number Publication date
HU190656B (en) 1986-10-28
HUT36900A (en) 1985-10-28
ES288115U (en) 1986-01-01
BG41479A3 (en) 1987-06-15
DE3466449D1 (en) 1987-10-29
PT79401A (en) 1984-11-01
PT79401B (en) 1986-08-28
FR2555671B1 (en) 1986-04-25
EP0143023A1 (en) 1985-05-29
ES288115Y (en) 1986-08-01
RO91030A (en) 1987-04-30
FR2555671A1 (en) 1985-05-31
RO91030B (en) 1987-05-01
YU196584A (en) 1986-10-31

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