EP0268502B1 - Ignition distributor cap comprising at least a hook-shaped cable connection - Google Patents

Ignition distributor cap comprising at least a hook-shaped cable connection Download PDF

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Publication number
EP0268502B1
EP0268502B1 EP87402025A EP87402025A EP0268502B1 EP 0268502 B1 EP0268502 B1 EP 0268502B1 EP 87402025 A EP87402025 A EP 87402025A EP 87402025 A EP87402025 A EP 87402025A EP 0268502 B1 EP0268502 B1 EP 0268502B1
Authority
EP
European Patent Office
Prior art keywords
opening
clamp
lead
slot
distributor
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
EP87402025A
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German (de)
French (fr)
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EP0268502A1 (en
Inventor
Roger Legras
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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Filing date
Publication date
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0268502A1 publication Critical patent/EP0268502A1/en
Application granted granted Critical
Publication of EP0268502B1 publication Critical patent/EP0268502B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors
    • F02P7/022—Details of the distributor rotor or electrode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors
    • F02P7/026—Distributors combined with other ignition devices, e.g. coils, fuel-injectors

Definitions

  • the invention relates to a cover of an ignition distributor of an internal combustion engine comprising means for fixing and connecting the end of at least one cable for high voltage electric current.
  • the internal combustion engine ignition distributors have a cover or head of insulating material receiving the ends of the cables bringing the high voltage electric current from the ignition coil and transmitting the current pulses to each of the spark plugs successively. .
  • Each of these high-voltage electric cables must be connected to a terminal made of conductive material located inside the cover of the distributor. For this, we generally use a metal tip attached to the end of the cable, and electrically connected to the conductive core of the cable. The assembly is then mounted in a socket or on an olive electrically connected to the corresponding terminal arranged inside the cover of the dispenser. It is therefore necessary to provide for the attachment of a metal end piece to the end of the cable, by an operation which is difficult to automate, in its industrial practice.
  • a distributor comprising a distributor body in which are engaged removable studs having a tip-shaped end portion.
  • a distributor cover screwed onto the distributor body allows the ends of electrical cables to be fixed to the distributor and to make an electrical contact between the metallic core of the cables and the pads of the distributor.
  • Such a distributor does not allow the cables to be assembled quickly and automatically and to obtain very secure fixing of the cables on the distributor.
  • the object of the invention is therefore to propose a cover for an ignition distributor of an internal combustion engine comprising means for fixing and connecting the end of at least one cable for high voltage electric current. consisting of a metal core surrounded by an insulator, these fixing means comprising at least one clip allowing the cutting of the cable insulator, distributor cover which allows the assembly of the high voltage cable by a simple and easily automated operation and improve cable fixation.
  • the distributor cover comprises at least one cylindrical housing formed in the cover to receive the end portion of the cable, at least one blind opening of flat shape opening on its internal face, arranged transversely with respect to housing the cable and intersecting it and a clip of conductive material whose shape corresponds to the shape of the opening having a slot over its entire thickness, in its longitudinal direction corresponding to the longitudinal direction of the opening, the width is at most equal to the diameter of the cable core, part bevel end intersected by the end of the slot constituting a means of cutting the insulation of the cable in place in its housing, when the clip is forcefully inserted into the correspondingly shaped opening, the conductive core of the cable then coming into contact with the lateral edges of the slot and a part constituting an electrical contact pad projecting from the interior surface of the cover, when the clip is in place in the opening, at the inside the cover.
  • FIGs 1 and 2 we see a dispenser cover 1 of an insulating plastic material such as a resin, produced by molding.
  • the cover has two fixing lugs 1a and 1b at its periphery and five conduits 2a, 2b, 2c, 2d and 2e whose inlet openings are arranged laterally and which each receive a cable 4 making it possible to supply the distributor or collect from the distributor a high voltage current.
  • Each of the conduits 2a to 2e comprises a housing 3 whose internal diameter is substantially equal to the diameter of the corresponding cable 4.
  • the successive cables arranged in the conduits 2a to 2e will be designated by the references 4a to 4e.
  • Each of these cables is made up of a metallic core, for example made of copper or brass, surrounded by an insulator.
  • the central cable 4c is connected at its end, not shown, opposite the distributor, to the ignition coil of the engine on which the distributor is mounted.
  • the other four cables 4a, 4b, 4d and 4e have their ends, not shown, located opposite the distributor, each connected to a spark plug of the engine.
  • a rotor 6 is mounted on the body of the distributor (not shown), so as to rotate around the axis of the distributor and in the direction of arrow 7.
  • the rotor 6 comprises a conductive element making it possible to successively supply, during its rotation, each of the cables connected to a spark plug from the cable connected to the ignition coil.
  • each of the cables 4 is electrically connected to an electrical contact pad located under the distributor cover 1, that is to say on the side of its internal face 1c.
  • Each of the studs is formed by the end part of a clip 8 obtained by cutting and folding a brass plate.
  • the staples 8 can be formed according to one of the three types shown in Figures 3a, 3b and 3c.
  • the clips 8a and 8b shown respectively in Figures 3a and 3b allow the connection of cables connected to a spark plug and the constitution of a corresponding stud under the cover 1; the clip 8c shown in Figure 3c allows the connection of the cable 4c connected to the ignition coil and the constitution of a stud coming into contact with the rotor 6, along its axis.
  • the clip 8 comprises, over a part of its length, a slot 9 having an end portion 9a of circular shape located substantially mid-length of the clip 8, the second end of the slot 9 opening onto the extreme edge 10 of the 'clip, opposite its part constituting the electrical contact pad.
  • the width d of the slot 9 is preferably slightly less than the diameter of the metal core 14 of the cable 4.
  • the edge 10 of the clip 8 constitutes a cutting edge, the end part 11 of the clip being machined in the form of a bevel. This part 11 is separated into two halves 11a and 11b by the slot 9.
  • a blind opening 18 is provided in the cover 1, so as to open out onto the inner face 1c of this cover.
  • the opening 18 has a flat shape corresponding to the shape of the fixing and connection part of a clip 8, for example as visible in FIG. 4.
  • the flat opening 18 is arranged transversely and perpendicular to the housing 3 of the cable and intersects this housing, the cross section of which is inscribed in the opening 18.
  • the end of the cable is first introduced into the housing 3, until it stops on the bottom of the housing.
  • a clip 8 of suitable shape is introduced into the corresponding opening 18 (arrow 20 in FIGS. 6 and 7), then forcibly engaged until the bottom of the opening 18.
  • the pushing on the clip 8 during its engagement causes the cutting of the cable insulation 4 by the cutting edge 10.
  • the parts 11a and 11b of the clip 8 pass on either side of the conductive core 14 of the cable which is thus introduced inside slot 9.
  • the ends 13 of the cutting edge 10, towards the inside on either side of the slot 9, are rounded so as to avoid deterioration of the conductive core 14 of the cable, at the time of its introduction into the slot 9.
  • the width d of the slot 9 is less than the diameter of the conductive core 14, the latter may undergo a certain deformation inside the slot 9 (figure 4).
  • the slot 9 passing through the clip 8 of flat shape over its entire thickness makes two parallel branches in this clip, on either side of the slot 9, between which the core 14 is inserted.
  • the elasticity of the two branches of the clip and / or the deformation of the core 14 make it possible to make a very good electrical contact between the core 14 and the edges of the slot 9, this slot having a width slightly less than the diameter of l soul 14.
  • the corresponding electrical contact pad remains projecting with respect to the interior surface 1c of the cover 1 of the dispenser.
  • the stud 16 is constituted by a folding of a side portion of the clip 8 having a substantially cylindrical shape. This stud 16 makes it possible to make electrical contact with the conductive part of the rotor 6 at the time of its passage, as it is visible in FIG. 1.
  • the stud 17 is constituted by a cylindrical carbon attached to the end of a spring 14 itself mounted and brought into abutment in a cylindrical folding 12 produced at the end of the clip 8.
  • the carbon 17 and the spring 14 have been shown before their mounting in the cylindrical folding 12 of the clip 8.
  • the flat opening 18 formed in the cover 1 comprises, in its part opening onto the face 1c of the cover of the dispenser, a cylindrical opening which allows the cylindrical part 12 of the clip 8 to be received.
  • the end of the carbon 17 constituting an electrical contact pad protrudes relative to the part 12 of the clip and comes into contact with the upper conductive part of the rotor 6.
  • the end part of the rotor arm comes into contact, as explained above, successively with the studs 16 of type 8a staples and with the studs 16 'of type 8b staples.
  • FIG 8 there is shown an alternative embodiment of the fixing portion and connection of a clip 8 and the corresponding flat opening 18.
  • This opening has, in its blind end part, inside the cover 1, a narrowing 18a whose width is less than the width of the end part of the clip 8.
  • This narrowing 18a is separated from the running part of the opening 8 by inclined surfaces 18b.
  • the clip 8 has an end portion of reduced width, this width being however greater than the width of the narrowed portion 18a of the opening 18.
  • two inclined edges are produced. 21 which come, at the end of engagement of the clip 8 in the opening 18, in abutment on the inclined surfaces 18b of the opening 18. This thus brings the two branches of the clip 8 closer together and effective tightening of the conductive part 14 of the cable, the electrical contact of which is thus improved with the clip 8.
  • the distributor cover according to the invention therefore has the advantage of making it possible to achieve very quickly, very easily and very efficiently, the fixing and connection of the high-voltage cables of the distributor.
  • the cables cannot come loose under the effect of vibrations, the clip being perfectly caught in the cable insulation.
  • the staples may have any shape desired for producing electrical contact pads adapted to their use.
  • the slot in the end portion of the clip may have a width close to the diameter of the conductive core of the cable, this conductive core then being only slightly or not deformed at the time of its introduction into the slot. However, this width must be at most equal to the diameter of the conductive core for an electrical contact to be ensured.
  • the staples can be made of any material having good electrical conductivity and sufficient hardness and elasticity.
  • the invention applies to any distributor of an internal combustion engine regardless of the number of high-voltage cables fixed and connected to the distributor.

Description

L'invention concerne un couvercle d'un distributeur d'allumage d'un moteur à combustion interne comportant des moyens de fixation et de raccordement de l'extrémité d'au moins un câble pour courant électrique à haute tension.The invention relates to a cover of an ignition distributor of an internal combustion engine comprising means for fixing and connecting the end of at least one cable for high voltage electric current.

Les distributeurs d'allumage de moteur à combustion interne comportent un couvercle ou tête en matière isolante recevant les extrémités des câbles amenant le courant électrique à haute tension depuis la bobine d'allumage et transmettant les impulsions de courant à chacune des bougies d'allumage successivement. Chacun de ces câbles électriques à haute tension doit être raccordé à une borne en matériau conducteur située à l'intérieur du couvercle du distributeur. Pour cela, on utilise généralement un embout métallique fixé à l'extrémité du câble, et relié électriquement à l'âme conductrice du câble. L'ensemble est ensuite monté dans une douille ou sur une olive reliée électriquement à la borne correspondante disposée à l'intérieur du couvercle du distributeur. Il est donc nécessaire de prévoir la fixation d'un embout métallique à l'extrémité du câble, par une opération qui est difficilement automatisable, dans sa pratique industrielle.The internal combustion engine ignition distributors have a cover or head of insulating material receiving the ends of the cables bringing the high voltage electric current from the ignition coil and transmitting the current pulses to each of the spark plugs successively. . Each of these high-voltage electric cables must be connected to a terminal made of conductive material located inside the cover of the distributor. For this, we generally use a metal tip attached to the end of the cable, and electrically connected to the conductive core of the cable. The assembly is then mounted in a socket or on an olive electrically connected to the corresponding terminal arranged inside the cover of the dispenser. It is therefore necessary to provide for the attachment of a metal end piece to the end of the cable, by an operation which is difficult to automate, in its industrial practice.

En outre, le maintien en place de l'embout du câble sur la douille ou l'olive du couvercle du distributeur n'est assuré que par engagement en force de ces pièces l'une sur l'autre. Un tel assemblage peut prendre du jeu et, sous l'effet des vibrations, l'un des câbles raccordés au couvercle du distributeur peut se détacher.In addition, the retention in place of the end of the cable on the sleeve or the olive of the distributor cover is only ensured by force engagement of these parts one on the other. Such an assembly can take play and, under the effect of vibrations, one of the cables connected to the cover of the dispenser can come loose.

Dans le FR-A-953.715, on décrit un distributeur comportant un corps de distributeur dans lequel sont engagés des plots amovibles ayant une partie d'extrémité en forme de pointe. Un couvercle de distributeur vissé sur le corps de distributeur permet de fixer les extrémités de câbles électriques sur le distributeur et de réaliser un contact électrique entre l'âme métallique des câbles et les plots du distributeur. Un tel distributeur ne permet pas de réaliser le montage des câbles de manière rapide et automatisable et d'obtenir une fixation très sûre des câbles sur le distributeur.In FR-A-953.715, a distributor is described comprising a distributor body in which are engaged removable studs having a tip-shaped end portion. A distributor cover screwed onto the distributor body allows the ends of electrical cables to be fixed to the distributor and to make an electrical contact between the metallic core of the cables and the pads of the distributor. Such a distributor does not allow the cables to be assembled quickly and automatically and to obtain very secure fixing of the cables on the distributor.

Par le US-A-4.040.701, on connaît un boîtier de connexion de câbles comportant des agrafes et des pièces d'engagement des câbles qui sont montées mobiles les unes par rapport aux autres pour assurer la connexion de chacun des câbles. Des moyens de connexion analogues n'ont jamais été utilisés dans le cas d'un distributeur d'allumage.From US-A-4,040,701, a cable connection box is known comprising clips and cable engagement parts which are mounted movable with respect to each other to ensure the connection of each of the cables. Similar connection means have never been used in the case of an ignition distributor.

Le but de l'invention est donc de proposer un couvercle d'un distributeur d'allumage d'un moteur à combustion interne comportant des moyens de fixation et de raccordement de l'extrémité d'au moins un câble pour courant électrique à haute tension constitué par une âme métallique entourée par un isolant, ces moyens de fixation comportant au moins une agrafe permettant le découpage de l'isolant du câble, couvercle de distributeur qui permette de réaliser le montage du câble haute tension par une opération simple et facilement automatisable et d'améliorer la fixation des câbles.The object of the invention is therefore to propose a cover for an ignition distributor of an internal combustion engine comprising means for fixing and connecting the end of at least one cable for high voltage electric current. consisting of a metal core surrounded by an insulator, these fixing means comprising at least one clip allowing the cutting of the cable insulator, distributor cover which allows the assembly of the high voltage cable by a simple and easily automated operation and improve cable fixation.

Dans ce but, le couvercle de distributeur suivant l'invention comporte au moins un logement cylindrique ménagé dans le couvercle pour recevoir la partie d'extrémité du câble, au moins une ouverture borgne de forme plate débouchant sur sa face interne, disposée transversalement par rapport au logement du câble et recoupant celui-ci et une agrafe en matériau conducteur dont la forme correspond à la forme de l'ouverture présentant une fente sur toute son épaisseur, dans sa direction longitudinale correspondant à la direction longitudinale de l'ouverture, dont la largeur est au plus égale au diamètre de l'âme du câble, une partie d'extrémité en biseau recoupée par l'extrémité de la fente constituant un moyen de coupe de l'isolant du câble en place dans son logement, au moment de l'introduction en force de l'agrafe dans l'ouverture de forme correspondante, l'âme conductrice du câble venant alors en contact avec les bords latéraux de la fente et une partie constituant un plot de contact électrique saillant par rapport à la surface intérieure du couvercle, lorsque l'agrafe est en place dans l'ouverture, à l'intérieur du couvercle.For this purpose, the distributor cover according to the invention comprises at least one cylindrical housing formed in the cover to receive the end portion of the cable, at least one blind opening of flat shape opening on its internal face, arranged transversely with respect to housing the cable and intersecting it and a clip of conductive material whose shape corresponds to the shape of the opening having a slot over its entire thickness, in its longitudinal direction corresponding to the longitudinal direction of the opening, the width is at most equal to the diameter of the cable core, part bevel end intersected by the end of the slot constituting a means of cutting the insulation of the cable in place in its housing, when the clip is forcefully inserted into the correspondingly shaped opening, the conductive core of the cable then coming into contact with the lateral edges of the slot and a part constituting an electrical contact pad projecting from the interior surface of the cover, when the clip is in place in the opening, at the inside the cover.

Afin de bien faire comprendre l'invention, on va maintenant décrire, à titre d'exemple non limitatif, en se référant aux figures jointes en annexe, un mode de réalisation d'un couvercle de distributeur d'allumage suivant l'invention.In order to clearly understand the invention, a description will now be given, by way of nonlimiting example, with reference to the appended figures, an embodiment of an ignition distributor cover according to the invention.

Dans ces figures :

  • la figure 1 est une vue de dessous d'un couvercle de distributeur d'allumage selon l'invention ;
  • la figure 2 est une vue en coupe suivant 2-2 de la figure 1 ;
  • les figures 3a, 3b et 3c sont des vues en perspective d'agrafes de trois types différents destinées à équiper un couvercle de distributeur d'allumage suivant l'invention ;
  • la figure 4 est une vue de face de la partie d'une agrafe venant s'engager dans le couvercle de distributeur ;
  • la figure 5 est une vue de côté suivant 5 de la figure 4 ;
  • la figure 6 est une vue en perspective et en coupe d'une partie d'un couvercle de distributeur suivant l'invention montrant les moyens de fixation d'un câble relié à une bougie d'allumage du moteur ;
  • la figure 7 est une vue en perspective et en coupe d'une partie d'un couvercle de distributeur d'allumage suivant l'invention montrant les moyens de fixation d'un câble relié à la bobine d'allumage du moteur ;
  • la figure 8 est une vue de face de la partie d'une agrafe engagée dans le couvercle de distributeur, analogue à la figure 4, et relative à une variante de réalisation.
In these figures:
  • Figure 1 is a bottom view of an ignition distributor cover according to the invention;
  • Figure 2 is a sectional view along 2-2 of Figure 1;
  • Figures 3a, 3b and 3c are perspective views of staples of three different types intended to equip an ignition distributor cover according to the invention;
  • Figure 4 is a front view of the portion of a staple engaging the dispenser cover;
  • Figure 5 is a side view along 5 of Figure 4;
  • Figure 6 is a perspective view in section of a portion of a distributor cover according to the invention showing the means for fixing a cable connected to a spark plug of the engine;
  • Figure 7 is a perspective view in section of a portion of an ignition distributor cover according to the invention showing the means for fixing a cable connected to the ignition coil of the engine;
  • Figure 8 is a front view of the part of a clip engaged in the dispenser cover, similar to Figure 4, and relating to an alternative embodiment.

Sur les figures 1 et 2, on voit un couvercle de distributeur 1 en une matière plastique isolante telle qu'une résine, réalisé par moulage. Le couvercle comporte deux pattes de fixation 1a et 1b à sa périphérie et cinq conduits 2a, 2b, 2c, 2d et 2e dont les ouvertures d'entrée sont disposées latéralement et qui reçoivent chacun un câble 4 permettant de fournir au distributeur ou de recueillir sur le distributeur un courant à haute tension. Chacun des conduits 2a à 2e comporte un logement 3 dont le diamètre intérieur est sensiblement égal au diamètre du câble 4 correspondant. Les câbles successifs disposés dans les conduits 2a à 2e seront désignés par les repères 4a à 4e. Chacun de ces câbles est constitué par une âme métallique, par exemple en cuivre ou en laiton, entourée par un isolant. Le câble central 4c est relié à son extrémité non représentée, à l'opposé du distributeur, à la bobine d'allumage du moteur sur lequel est monté le distributeur. Les quatre autres câbles 4a, 4b, 4d et 4e ont leurs extrémités non représentées situées à l'opposé du distributeur, reliées chacune à une bougie d'allumage du moteur.In Figures 1 and 2, we see a dispenser cover 1 of an insulating plastic material such as a resin, produced by molding. The cover has two fixing lugs 1a and 1b at its periphery and five conduits 2a, 2b, 2c, 2d and 2e whose inlet openings are arranged laterally and which each receive a cable 4 making it possible to supply the distributor or collect from the distributor a high voltage current. Each of the conduits 2a to 2e comprises a housing 3 whose internal diameter is substantially equal to the diameter of the corresponding cable 4. The successive cables arranged in the conduits 2a to 2e will be designated by the references 4a to 4e. Each of these cables is made up of a metallic core, for example made of copper or brass, surrounded by an insulator. The central cable 4c is connected at its end, not shown, opposite the distributor, to the ignition coil of the engine on which the distributor is mounted. The other four cables 4a, 4b, 4d and 4e have their ends, not shown, located opposite the distributor, each connected to a spark plug of the engine.

Un rotor 6 est monté sur le corps du distributeur (non représenté), de façon à tourner autour de l'axe du distributeur et dans le sens de la flèche 7.A rotor 6 is mounted on the body of the distributor (not shown), so as to rotate around the axis of the distributor and in the direction of arrow 7.

Le rotor 6 comporte un élément conducteur permettant d'alimenter successivement, lors de sa rotation, chacun des câbles reliés à une bougie à partir du câble relié à la bobine d'allumage. Pour cela, chacun des câbles 4 est raccordé électriquement à un plot de contact électrique situé sous le couvercle de distributeur 1, c'est-à-dire du côté de sa face interne 1c. Chacun des plots est constitué par la partie d'extrémité d'une agrafe 8 obtenue par découpage et pliage d'une plaquette en laiton.The rotor 6 comprises a conductive element making it possible to successively supply, during its rotation, each of the cables connected to a spark plug from the cable connected to the ignition coil. For this, each of the cables 4 is electrically connected to an electrical contact pad located under the distributor cover 1, that is to say on the side of its internal face 1c. Each of the studs is formed by the end part of a clip 8 obtained by cutting and folding a brass plate.

Les agrafes 8 peuvent être constituées suivant l'un des trois types représentés sur les figures 3a, 3b et 3c. Les agrafes 8a et 8b représentées respectivement sur les figures 3a et 3b permettent le raccordement des câbles reliés à une bougie d'allumage et la constitution d'un plot correspondant sous le couvercle 1 ; l'agrafe 8c représentée sur la figure 3c permet le raccordement du câble 4c relié à la bobine d'allumage et la constitution d'un plot venant en contact avec le rotor 6, suivant son axe.The staples 8 can be formed according to one of the three types shown in Figures 3a, 3b and 3c. The clips 8a and 8b shown respectively in Figures 3a and 3b allow the connection of cables connected to a spark plug and the constitution of a corresponding stud under the cover 1; the clip 8c shown in Figure 3c allows the connection of the cable 4c connected to the ignition coil and the constitution of a stud coming into contact with the rotor 6, along its axis.

En se référant aux figures 4 et 5, on va maintenant décrire plus en détail la partie d'une agrafe 8 permettant la fixation et le raccordement de l'extrémité d'un câble 4 engagée dans un logement 3 du collecteur 1. L'agrafe 8 comporte, sur une partie de sa longueur, une fente 9 présentant une partie d'extrémité 9a de forme circulaire située sensiblement à mi-longueur de l'agrafe 8, la seconde extrémité de la fente 9 débouchant sur le bord extrême 10 de l'agrafe, opposé à sa partie constituant le plot de contact électrique. La largeur d de la fente 9 est de préférence légèrement inférieure au diamètre de l'âme métallique 14 du câble 4. Le bord 10 de l'agrafe 8 constitue une arête de coupe, la partie d'extrémité 11 de l'agrafe étant usinée sous forme d'un biseau. Cette partie 11 est séparée en deux moitiés 11a et 11b par la fente 9.Referring to Figures 4 and 5, we will now describe in more detail the part of a clip 8 allowing the fixing and connection of the end of a cable 4 engaged in a housing 3 of the collector 1. The clip 8 comprises, over a part of its length, a slot 9 having an end portion 9a of circular shape located substantially mid-length of the clip 8, the second end of the slot 9 opening onto the extreme edge 10 of the 'clip, opposite its part constituting the electrical contact pad. The width d of the slot 9 is preferably slightly less than the diameter of the metal core 14 of the cable 4. The edge 10 of the clip 8 constitutes a cutting edge, the end part 11 of the clip being machined in the form of a bevel. This part 11 is separated into two halves 11a and 11b by the slot 9.

En se reportant aux figures 6 et 7, on va maintenant décrire le mode de fixation et de raccordement d'un câble 4 dans le logement 3 du couvercle 1 du distributeur.Referring to Figures 6 and 7, we will now describe the method of fixing and connecting a cable 4 in the housing 3 of the cover 1 of the distributor.

Une ouverture borgne 18 est prévue dans le couvercle 1, de façon à être débouchante sur la face intérieure 1c de ce couvercle. L'ouverture 18 présente une forme plate correspondant à la forme de la partie de fixation et de raccordement d'une agrafe 8, par exemple telle que visible sur la figure 4. L'ouverture plate 18 est disposée transversalement et perpendiculairement par rapport au logement 3 du câble et recoupe ce logement dont la section transversale est inscrite dans l'ouverture 18.A blind opening 18 is provided in the cover 1, so as to open out onto the inner face 1c of this cover. The opening 18 has a flat shape corresponding to the shape of the fixing and connection part of a clip 8, for example as visible in FIG. 4. The flat opening 18 is arranged transversely and perpendicular to the housing 3 of the cable and intersects this housing, the cross section of which is inscribed in the opening 18.

Pour réaliser la fixation et le raccordement du câble 4, l'extrémité du câble est tout d'abord introduite dans le logement 3, jusqu'à venir en butée sur le fond du logement. Une agrafe 8 de forme adéquate est introduite dans l'ouverture 18 correspondante (flèche 20 des figures 6 et 7), puis engagée à force jusqu'au fond de l'ouverture 18. La poussée sur l'agrafe 8 pendant son engagement provoque le découpage de l'isolant du câble 4 par l'arête de coupe 10. Les parties 11a et 11b de l'agrafe 8 passent de part et d'autre de l'âme conductrice 14 du câble qui est ainsi introduite à l'intérieur de la fente 9.To fix and connect the cable 4, the end of the cable is first introduced into the housing 3, until it stops on the bottom of the housing. A clip 8 of suitable shape is introduced into the corresponding opening 18 (arrow 20 in FIGS. 6 and 7), then forcibly engaged until the bottom of the opening 18. The pushing on the clip 8 during its engagement causes the cutting of the cable insulation 4 by the cutting edge 10. The parts 11a and 11b of the clip 8 pass on either side of the conductive core 14 of the cable which is thus introduced inside slot 9.

Comme il est visible sur la figure 4, les extrémités 13 de l'arête de coupe 10, vers l'intérieur de part et d'autre de la fente 9, sont arrondies de façon à éviter une détérioration de l'âme conductrice 14 du câble, au moment de son introduction dans la fente 9. Dans le cas où la largeur d de la fente 9 est inférieure au diamètre de l'âme conductrice 14, celle-ci peut subir une certaine déformation à l'intérieur de la fente 9 (figure 4). La fente 9 traversant l'agrafe 8 de forme plate sur toute son épaisseur réalise deux branches parallèles dans cette agrafe, de part et d'autre de la fente 9, entre lesquelles vient s'intercaler l'âme 14. L'élasticité des deux branches de l'agrafe et/ou la déformation de l'âme 14 permettent de réaliser un contact électrique de très bonne qualité entre l'âme 14 et les bords de la fente 9, cette fente ayant une largeur un peu inférieure au diamètre de l'âme 14.As can be seen in FIG. 4, the ends 13 of the cutting edge 10, towards the inside on either side of the slot 9, are rounded so as to avoid deterioration of the conductive core 14 of the cable, at the time of its introduction into the slot 9. In the case where the width d of the slot 9 is less than the diameter of the conductive core 14, the latter may undergo a certain deformation inside the slot 9 (figure 4). The slot 9 passing through the clip 8 of flat shape over its entire thickness makes two parallel branches in this clip, on either side of the slot 9, between which the core 14 is inserted. The elasticity of the two branches of the clip and / or the deformation of the core 14 make it possible to make a very good electrical contact between the core 14 and the edges of the slot 9, this slot having a width slightly less than the diameter of l soul 14.

On a donc réalisé à la fois une très bonne fixation du câble 4 dans son logement 3, en faisant traverser l'isolant du câble par l'agrafe et un très bon contact électrique entre l'âme conductrice du câble et l'agrafe.So we have achieved both a very good fixing of the cable 4 in its housing 3, by passing the cable insulation through the clip and a very good electrical contact between the conductive core of the cable and the clip.

En fin d'introduction de l'agrafe 8, le plot de contact électrique correspondant reste saillant par rapport à la surface intérieure 1c du couvercle 1 du distributeur.At the end of introduction of the clip 8, the corresponding electrical contact pad remains projecting with respect to the interior surface 1c of the cover 1 of the dispenser.

Dans le cas de l'agrafe 8 représenté sur la figure 6 qui est du type 8a représenté sur la figure 3a, le plot 16 est constitué par un pliage d'une partie latérale de l'agrafe 8 ayant une forme sensiblement cylindrique. Ce plot 16 permet de réaliser le contact électrique avec la partie conductrice du rotor 6 au moment de son passage, comme il est visible sur la figure 1.In the case of the clip 8 shown in Figure 6 which is of the type 8a shown in Figure 3a, the stud 16 is constituted by a folding of a side portion of the clip 8 having a substantially cylindrical shape. This stud 16 makes it possible to make electrical contact with the conductive part of the rotor 6 at the time of its passage, as it is visible in FIG. 1.

Dans le cas de l'agrafe 8 représenté sur la figure 7, qui est du type 8c représenté sur la figure 3c, le plot 17 est constitué par un charbon de forme cylindrique fixé à l'extrémité d'une ressort 14 lui-même monté et mis en butée dans un pliage cylindrique 12 réalisé à l'extrémité de l'agrafe 8. Sur la figure 7, le charbon 17 et le ressort 14 ont été représentés avant leur montage dans le pliage cylindrique 12 de l'agrafe 8. L'ouverture plate 18' ménagée dans le couvercle 1 comporte, dans sa partie débouchant sur la face 1c du couvercle du distributeur, un épanouissement de forme cylindrique permettant de recevoir la partie cylindrique 12 de l'agrafe 8.In the case of the clip 8 shown in Figure 7, which is of the type 8c shown in Figure 3c, the stud 17 is constituted by a cylindrical carbon attached to the end of a spring 14 itself mounted and brought into abutment in a cylindrical folding 12 produced at the end of the clip 8. In FIG. 7, the carbon 17 and the spring 14 have been shown before their mounting in the cylindrical folding 12 of the clip 8. L the flat opening 18 formed in the cover 1 comprises, in its part opening onto the face 1c of the cover of the dispenser, a cylindrical opening which allows the cylindrical part 12 of the clip 8 to be received.

Comme il est visible sur la figure 2, l'extrémité du charbon 17 constituant un plot de contact électrique est saillante par rapport à la partie 12 de l'agrafe et vient en contact avec la partie supérieure conductrice du rotor 6.As can be seen in FIG. 2, the end of the carbon 17 constituting an electrical contact pad protrudes relative to the part 12 of the clip and comes into contact with the upper conductive part of the rotor 6.

La partie d'extrémité du bras du rotor, également conductrice, vient en contact, comme on l'a expliqué plus haut, successivement avec les plots 16 des agrafes de type 8a et avec les plots 16' des agrafes de type 8b.The end part of the rotor arm, also conductive, comes into contact, as explained above, successively with the studs 16 of type 8a staples and with the studs 16 'of type 8b staples.

Sur la figure 8, on a représenté une variante de réalisation de la partie de fixation et de raccordement d'une agrafe 8 et de l'ouverture plate 18 correspondante. Cette ouverture comporte, dans sa partie d'extrémité borgne, à l'intérieur du couvercle 1, un rétrécissement 18a dont la largeur est inférieure à la largeur de la partie d'extrémité de l'agrafe 8. Ce rétrécissement 18a est séparé de la partie courante de l'ouverture 8 par des surfaces inclinées 18b. L'agrafe 8 comporte une partie d'extrémité de largeur réduite, cette largeur étant cependant supérieure à la largeur de la partie rétrécie 18a de l'ouverture 18. Dans cette partie de largeur réduite de l'agrafe 8, on réalise deux bords inclinés 21 qui viennent, en fin d'engagement de l'agrafe 8 dans l'ouverture 18, en butée sur les surfaces inclinées 18b de l'ouverture 18. On obtient ainsi un rapprochement des deux branches de l'agrafe 8 et un serrage efficace de la partie conductrice 14 du câble dont on améliore ainsi le contact électrique avec l'agrafe 8.In Figure 8, there is shown an alternative embodiment of the fixing portion and connection of a clip 8 and the corresponding flat opening 18. This opening has, in its blind end part, inside the cover 1, a narrowing 18a whose width is less than the width of the end part of the clip 8. This narrowing 18a is separated from the running part of the opening 8 by inclined surfaces 18b. The clip 8 has an end portion of reduced width, this width being however greater than the width of the narrowed portion 18a of the opening 18. In this portion of reduced width of the clip 8, two inclined edges are produced. 21 which come, at the end of engagement of the clip 8 in the opening 18, in abutment on the inclined surfaces 18b of the opening 18. This thus brings the two branches of the clip 8 closer together and effective tightening of the conductive part 14 of the cable, the electrical contact of which is thus improved with the clip 8.

Le couvercle de distributeur suivant l'invention a donc l'avantage de permettre de réaliser très rapidement, très facilement et de façon très efficace, la fixation et le raccordement des câbles à haute tension du distributeur. En particulier, les câbles ne peuvent se détacher sous l'effet des vibrations, l'agrafe étant parfaitement prise dans l'isolant du câble.The distributor cover according to the invention therefore has the advantage of making it possible to achieve very quickly, very easily and very efficiently, the fixing and connection of the high-voltage cables of the distributor. In particular, the cables cannot come loose under the effect of vibrations, the clip being perfectly caught in the cable insulation.

L'invention ne se limite pas au mode de réalisation qui a été décrit.The invention is not limited to the embodiment which has been described.

C'est ainsi que seule une partie des câbles du distributeur pourra être fixée et raccordée de la façon qui a été décrite.Thus, only a part of the distributor cables can be fixed and connected in the manner which has been described.

Les agrafes pourront avoir toute forme voulue pour réaliser des plots de contact électrique adaptés à leur utilisation.The staples may have any shape desired for producing electrical contact pads adapted to their use.

La fente ménagée dans la partie d'extrémité de l'agrafe peut avoir une largeur voisine du diamètre de l'âme conductrice du câble, cette âme conductrice n'étant alors que peu ou pas déformée au moment de son introduction dans la fente. Cependant, cette largeur doit être au plus égale au diamètre de l'âme conductrice pour qu'un contact électrique soit assuré.The slot in the end portion of the clip may have a width close to the diameter of the conductive core of the cable, this conductive core then being only slightly or not deformed at the time of its introduction into the slot. However, this width must be at most equal to the diameter of the conductive core for an electrical contact to be ensured.

Les agrafes peuvent être réalisées en toute matière possédant une bonne conductibilité électrique et une dureté et une élasticité suffisantes.The staples can be made of any material having good electrical conductivity and sufficient hardness and elasticity.

Enfin, l'invention s'applique à tout distributeur de moteur à combustion interne quel que soit le nombre de câbles à haute tension fixés et raccordés au distributeur.Finally, the invention applies to any distributor of an internal combustion engine regardless of the number of high-voltage cables fixed and connected to the distributor.

Claims (5)

  1. Ignition distributor cap for an internal combustion engine, incorporating means for fixing and connecting the end of at least one lead (4) for a high tension electrical current consisting of a metal core (4) surrounded by an insulator, these fixing means incorporating at least one clamp enabling the insulator on the lead to be cut, characterised by the fact that it incorporates at least one cylindrical housing (3) provided in the cap to accommodate the end part of the lead (4), at least one blind opening (18), flat in shape, opening out onto the internal face (1c) of the cap, arranged transversely with respect to the housing (3) for the lead (4) and intersecting it, and a clamp (8) made from conducting material, whose shape corresponds to the shape of the opening (18), having a slot (9) over its entire thickness, in its longitudinal direction corresponding to the longitudinal direction of the opening (18), whose width is at most equal to the diameter of the core (14) of the lead, a bevelled end part (11a, 11b) intersected by the end of the slot (9) constituting a means of cutting the insulator on the lead (4) in place in its housing (3) when the clamp (8) is forcibly inserted into the correspondingly shaped opening (18), the conducting core of the lead (4) then coming into contact with the lateral edges of the slot (9) and a part (16, 16', 12, 17) constituting an electrical contact pin projecting with respect to the internal surface (1c) of the cap (1), when the clamp (8) is in place in the opening (18), inside the cap (1).
  2. Distributor cap according to claim 1, characterised by the fact that the clamp (8) is produced by cutting and bending a metal strip.
  3. Distributor cap according to either of claims 1 and 2, characterised by the fact that the flat opening (18) has, in its blind end, inside the cap (1), a part (18a) with a reduced width separated from the normal part of the opening (18) by sloping edges (18b) and that the clamp (8) has, in its end part, a reduced width and sloping edges (21) designed to interact with the sloping edges (18b) of the opening (18) when the clamp (8) is inserted in the opening (18) to bring the lateral edges of the slot (9) closer together.
  4. Distributor cap according to any one of claims 1 to 3, to which are connected a lead (4c), for connecting to the engine ignition coil and several leads (4a, 4b, 4d, 4e) each connected to an engine spark plug, characterised by the fact that the clamps (8a, 8b) corresponding to the leads connected to the spark plugs incorporate pins (16, 16') formed by a simple bending of the clamp (8a, 8b) and that the clamp (8c) corresponding to the lead connected to the ignition coil incorporates a pin (12, 17) formed by a carbon brush held by a spring (14) in a part (12) of the clamp bent into a cylindrical shape.
  5. Distributor cap according to claim 1, characterised by the fact that the slot (9) in the clamp (S) has a width d less than the diameter of the metal core (14) of the lead (4), this metal core being deformed when the clamp (8) is inserted in the opening (18).
EP87402025A 1986-09-23 1987-09-10 Ignition distributor cap comprising at least a hook-shaped cable connection Expired - Lifetime EP0268502B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8613261 1986-09-23
FR8613261A FR2604221B1 (en) 1986-09-23 1986-09-23 COVER OF AN IGNITION DISTRIBUTOR OF AN INTERNAL COMBUSTION ENGINE COMPRISING FIXING AND CONNECTION MEANS FOR ELECTRICAL CABLES.

Publications (2)

Publication Number Publication Date
EP0268502A1 EP0268502A1 (en) 1988-05-25
EP0268502B1 true EP0268502B1 (en) 1991-11-13

Family

ID=9339180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402025A Expired - Lifetime EP0268502B1 (en) 1986-09-23 1987-09-10 Ignition distributor cap comprising at least a hook-shaped cable connection

Country Status (3)

Country Link
EP (1) EP0268502B1 (en)
DE (1) DE3774537D1 (en)
FR (1) FR2604221B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE193620T1 (en) * 1996-04-13 2000-06-15 Hirschmann Richard Gmbh Co CABLE CONNECTORS

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1745077A (en) * 1924-03-27 1930-01-28 Delco Remy Corp Ignition distributor
US4040701A (en) * 1976-07-30 1977-08-09 Bell Telephone Laboratories, Incorporated Quick connector for service wires
US4333700A (en) * 1980-05-23 1982-06-08 Bell Telephone Laboratories, Incorporated Insulation-penetrating slotted beam contact element
FR2507695A1 (en) * 1981-06-12 1982-12-17 Marchal Equip Auto High tension current distributor for IC engine ignition - has lead connectors lying in plane perpendicular to rotor axis and oriented towards one side of distributor cap

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR953715A (en) * 1947-10-03 1949-12-12 Ducellier Ets Further training in ignition distributors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1745077A (en) * 1924-03-27 1930-01-28 Delco Remy Corp Ignition distributor
US4040701A (en) * 1976-07-30 1977-08-09 Bell Telephone Laboratories, Incorporated Quick connector for service wires
US4333700A (en) * 1980-05-23 1982-06-08 Bell Telephone Laboratories, Incorporated Insulation-penetrating slotted beam contact element
FR2507695A1 (en) * 1981-06-12 1982-12-17 Marchal Equip Auto High tension current distributor for IC engine ignition - has lead connectors lying in plane perpendicular to rotor axis and oriented towards one side of distributor cap

Also Published As

Publication number Publication date
DE3774537D1 (en) 1991-12-19
EP0268502A1 (en) 1988-05-25
FR2604221A1 (en) 1988-03-25
FR2604221B1 (en) 1990-12-21

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