EP0327478A1 - Electrical connection terminal - Google Patents

Electrical connection terminal Download PDF

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Publication number
EP0327478A1
EP0327478A1 EP89420032A EP89420032A EP0327478A1 EP 0327478 A1 EP0327478 A1 EP 0327478A1 EP 89420032 A EP89420032 A EP 89420032A EP 89420032 A EP89420032 A EP 89420032A EP 0327478 A1 EP0327478 A1 EP 0327478A1
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EP
European Patent Office
Prior art keywords
well
sleeve
electrical connection
branch
plug
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.)
Withdrawn
Application number
EP89420032A
Other languages
German (de)
French (fr)
Inventor
Maurice Roger Bianchi-Amoretti
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.)
Electricfil Industrie SARL
Electricfil SA
Original Assignee
Electricfil Industrie SARL
Electricfil SA
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 Electricfil Industrie SARL, Electricfil SA filed Critical Electricfil Industrie SARL
Publication of EP0327478A1 publication Critical patent/EP0327478A1/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/02—Details
    • H01T13/04—Means providing electrical connection to sparking plugs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2101/00—One pole

Definitions

  • the present invention relates to the field of electrical connection between a conductor and an apparatus for producing or using electrical energy.
  • the present invention relates, more particularly, to the means of electrical connection between conductors and organs or accessories for the production or use of electrical energy forming part of heat engines and, more particularly but not exclusively, of heat engines of the type explosion and positive ignition.
  • connection lugs adapted at the end of the conductors and comprising an electrical connection branch able to cooperate with an olive-shaped terminal presented by a production device. or use.
  • connection means involving, in place of the olive-shaped terminal, a terminal in the form of a conductive well delimiting a peripheral groove with which the bosses or the like of a socket cooperate. or tubular plug formed by the electrical connection branch of a connection piece.
  • connection branch is threaded onto the olive-shaped terminal, while, in the second case, the socket or tubular plug is inserted inside the conductive well.
  • connection ends with tubular plug are generally, not to say in all cases, produced by rolling a pre-cut blank.
  • the blank is, generally, made of a metal chosen for its good electrical conductivity and its resistance to corrosion, for example, aluminum alloy, copper alloy or, again, stainless steel.
  • the tubular plug is produced by rolling two wings whose facing edges are kept at a distance to provide an elastic deformation capacity. Generally, in each of the wings, a boss is formed to cooperate with the groove of Wells.
  • the patent FR-A-1 320 252 shows, for example, an end piece or connector for electrical connection comprising a tubular plug composed of a cylindrical metallic ferrule crimped on a conductive electrical cable, in order to establish an electrical connection.
  • the plug is intended to be connected with a conductive well, of cylindrical shape, delimiting an annular groove.
  • the ferrule comprises, in its mass, tongues in the form of curved and projecting ribs intended to come into force in force in the annular groove of the conducting well.
  • Patent application EP-A-0 067 780 discloses an angled connection terminal, crimped on an electrical conductor and comprising connection wings provided with projecting bosses whose mechanical snap-on function is not constant over time.
  • the first function is generally provided by the external peripheral surface of the plug, while the second function results from the cooperation of the bosses with the groove.
  • connection piece of the above type Given the material of a connection piece of the above type, it is understood that the successive plugging and unpicking of the electrical connection branch relative to the well subjects the wings of the tubular plug to stresses inducing a fatigue poorly supported by the constituent material which quickly loses its characteristic of elastic reaction.
  • the wings of the tubular plug then have a tightened state with filling of the interval separating their edges or facing axial edges.
  • the protruding bosses occupy a recessed position and are no longer able to contribute to the establishment of the first surface contact function, nor to provide suitable mechanical support by snap-fastening inside the throat of the well.
  • the object of the invention is to remedy such a drawback by proposing structural modifications to the electrical connection end pieces with tubular plug or socket specifically designed to cooperate with a conductive well internally delimiting a peripheral groove.
  • the constructive proposals according to the present invention aim to improve the mechanical characteristics of the electrical connection end pieces of the tubular plug type, whether these end pieces are straight or bent.
  • the electrical connection tip is characterized in that the branch in the form of a plug or socket has an outside diameter slightly greater than the inside diameter of the well, delimits in its wall at least one window and contains a constrained metal clip, comprising at least one boss engaged in the window and projecting out of the external envelope of the sleeve to locally give it a cross-section greater than the internal diameter of the well.
  • Figs. 1 and 2 show an electrical connection tip 1 intended to establish the connection with a terminal 2 of an apparatus or accessory 3 for producing or using electrical energy.
  • Terminal 2 is of the type comprising a conductive cylindrical well 4 having a closed bottom 5 and delimiting, set back from its open inlet edge 6 , a groove 7 .
  • the well 4 is made of a conductive material having good electrical conductivity and good corrosion resistance, for example an alloy of aluminum, copper or, again, stainless steel.
  • the well 4 is surrounded by a ferrule 8 , made of insulating material, rising notably above the inlet edge 6 .
  • the ferrule 8 is carried by the member 3 whether or not it is an integral part of the latter.
  • the electrical connection terminal 1 is shown in the drawing in the form of a straight terminal, but it should be considered that the object of the invention would also apply to a terminal of the angled type, as is known in technical.
  • the electrical connection endpiece comprises a branch 9 for crimping and electrical connection with a conductor 10 .
  • the branch 9 delimits two wings 11 , preferably corrugated or otherwise wavy, intended to establish a strong electrical and mechanical connection after crimping on the conductor 10 .
  • the electrical connection end piece also includes an electrical connection branch 12 intended to cooperate with the well 4 .
  • the branch 12 is secured to the branch 9 by means of a part 13 , called the median, of mechanical connection.
  • the electrical connection branch 12 is produced in the form of a tubular plug or socket obtained by rolling two wings 14 whose edges or edges 15 facing each other are kept at a distance to delimit between them an axial slot 16 .
  • the tubular plug 12 has, in the idle state, a neighboring diameter by excess of the internal diameter of the well 4 .
  • the branch 12 also comprises an end portion 17 of diameter or cross section slightly smaller than that of the tubular plug, so as to facilitate the introduction of the plug into the well 4 from the inlet edge 6 .
  • the end portion 17 is formed in the form of an edge rolled inwardly or alternatively, preferably, by tongues 18 , in the form of petals bent inwardly.
  • At least one and preferably the two wings 14 have, in a transverse straight plane P , each a window 19 of any suitable shape, for example rectangular, formed in the angular part included between the edge 15 and the axial plane P1 perpendicular to an axial plane P2 passing through the slot 16 .
  • the windows 19 are provided to allow passage to bosses 20 which are projecting by an elastic clip 21 arranged constrained inside the tubular plug 12 .
  • the clip 21 is preferably made of a material having a high capacity for elastic reaction relative to that constituting the end piece and, preferably, of steel.
  • the clip 21 is in the form of a cylindrical ring having an axial opening 22 .
  • the bosses 20 are formed near edges 23 delimiting the opening 22 , so that they can be placed in coincidence with the windows 19 , when the opening 22 is aligned with the plane P2 and, consequently, the slot 16 . In this position, the two bosses 20 then protrude simultaneously through the windows 19 by a measurement such that the local cross-section of the tubular plug is then greater than the internal diameter of the well 4 .
  • the clip 21 is placed inside the tubular plug 12 to be kept under permanent stress, so that its reaction to the elastic deformation which is imposed on it tends to urge the wings 14 in relative opening.
  • connection end piece according to the invention can be inserted by the plug 12 inside the well 4 by engagement of the end portion 17 having the effect of gradually urging the wings 14 in radial constriction enabled through slot 16 .
  • This constraint is retransmitted to clip 21 which is thus elastically stressed.
  • the insertion of the tubular plug 12 continues axially in the direction of the arrow f1 with establishment of a surface contact function widely distributed between the outer periphery of the tubular plug and the inner peripheral surface of the well 4 due to the clip reaction 21 .
  • An additional constraint is imposed on the clip 21 during the engagement of the bosses 20 from the entry edge 6 , without however this additional constraint being applied to the wings 14 .
  • the bosses 20 snap automatically into the groove 7 , when the plane P coincides with the plane P3 of the latter, by the simple reaction of the clip 21 .
  • bosses 20 provide mechanical support between the tubular plug and the well 4 due to their engagement in the peripheral groove 7 .
  • These bosses also contribute to firmly pressing the part of the peripheral wall of the plug 12 situated opposite the plane P1 relative to themselves and thus contribute to maintaining the widest possible surface contact for the 'establishment of an electrical connection function.
  • the extraction of the plug 12 is obtained by acting on the end piece 1 by pulling, so as to cause the bosses to be erased through the windows 19 to facilitate the axial sliding of the plug or tubular sleeve relative to the well 4 .
  • the clip 21 After axial release, the clip 21 returns to its initial position by constraining the wings 14 in radial opening.
  • successive plugs and unplugs do not produce, as in the connection fittings currently known, a deflection of the wings at a point such that the outside diameter of the tubular plug or socket becomes less than that internal of the well 4 at the point of n '' establish a random electrical connection, especially in the event of vibrations.
  • the socket is also advantageously made so that the axial distance d , between the transverse straight plane P of the socket passing through the windows 19 and the plane P1 from the extreme edge of the sleeve, delimited by the terminal part 17 , either substantially equal to or slightly less than the axial distance D separating the transverse plane P3 from the groove 7 from the plane defined by the bottom 5 of the well 4 .

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Spark Plugs (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

The electrical connection terminal according to the invention is characterised in that the branch (12), in the form of a plug or a socket, has an external diameter slightly greater than the internal diameter of the borehole, defines at least one window (19) in its wall and contains a stressed metallic clip (21) comprising at least one projection (20) engaged in the window and projecting outside the external casing of the socket in order to impart to it locally a cross-section greater than the internal diameter of the borehole. Application to connection terminals for spark-ignition combustion engines. <IMAGE>

Description

La présente invention est relative au domaine de la connexion électrique entre un conducteur et un appareil de production ou d'utilisation d'énergie électrique.The present invention relates to the field of electrical connection between a conductor and an apparatus for producing or using electrical energy.

La présente invention est, plus particulièrement, relative aux moyens de connexion électrique entre des conducteurs et des organes ou accessoires de production ou d'utilisation d'énergie électrique faisant partie de moteurs thermiques et, plus particulièrement mais non exclusivement, de moteurs thermiques du type à explosion et à allumage commandé.The present invention relates, more particularly, to the means of electrical connection between conductors and organs or accessories for the production or use of electrical energy forming part of heat engines and, more particularly but not exclusively, of heat engines of the type explosion and positive ignition.

Parmi les moyens de connexion électrique dans le domaine ci-dessus, il convient de citer les cosses de raccordement adaptées en bout de conducteurs et comportant une branche de connexion électrique apte à coopérer avec une borne en forme d'olive présentée par un appareil de production ou d'utilisation. Il existe également, depuis quelque temps, des moyens de raccordement faisant intervenir, en lieu et place de la borne en forme d'olive, une borne en forme de puits conducteur délimitant une gorge périphérique avec laquelle coopèrent des bossages ou analogues d'une douille ou fiche tubulaire formée par la branche de connexion électrique d'un embout de raccordement.Among the means of electrical connection in the above field, mention should be made of the connection lugs adapted at the end of the conductors and comprising an electrical connection branch able to cooperate with an olive-shaped terminal presented by a production device. or use. There have also been, for some time, connection means involving, in place of the olive-shaped terminal, a terminal in the form of a conductive well delimiting a peripheral groove with which the bosses or the like of a socket cooperate. or tubular plug formed by the electrical connection branch of a connection piece.

Dans le premier cas, la branche de connexion est enfilée sur la borne en forme d'olive, alors que, dans le second cas, la douille ou fiche tubulaire est enfichée à l'intérieur du puits conducteur.In the first case, the connection branch is threaded onto the olive-shaped terminal, while, in the second case, the socket or tubular plug is inserted inside the conductive well.

Les embouts de raccordement à fiche tubulaire sont généralement, pour ne pas dire dans tous les cas, réalisés par roulage d'un flan prédécoupé. Le flan est, généralement, en un métal choisi pour sa bonne conductivité électrique et sa résistance à la corrosion, par exemple, en alliage d'aluminium, en alliage de cuivre ou, encore, en acier inoxydable.The connection ends with tubular plug are generally, not to say in all cases, produced by rolling a pre-cut blank. The blank is, generally, made of a metal chosen for its good electrical conductivity and its resistance to corrosion, for example, aluminum alloy, copper alloy or, again, stainless steel.

La fiche tubulaire est réalisée par roulage de deux ailes dont les bords se faisant face sont maintenus à distance pour offrir une capacité de déformation élastique. Généralement, dans chacune des ailes, un bossage est formé pour coopérer avec la gorge du puits.The tubular plug is produced by rolling two wings whose facing edges are kept at a distance to provide an elastic deformation capacity. Generally, in each of the wings, a boss is formed to cooperate with the groove of Wells.

Le brevet FR-A-1 320 252 montre, par exemple, un embout ou connecteur de raccordement électrique comprenant une fiche tubulaire composée d'une virole métallique cylindrique sertie sur un câble électrique conducteur, afin d'établir une liaison électrique. La fiche est destinée à être connectée avec un puits conducteur, de forme cylindrique, délimitant une gorge annulaire.The patent FR-A-1 320 252 shows, for example, an end piece or connector for electrical connection comprising a tubular plug composed of a cylindrical metallic ferrule crimped on a conductive electrical cable, in order to establish an electrical connection. The plug is intended to be connected with a conductive well, of cylindrical shape, delimiting an annular groove.

La virole comporte, dans sa masse, des languettes en forme de nervures courbes et saillantes destinées à venir s'engager en force dans la gorge annulaire du puits conducteur. Une telle solution soumet les languettes à des efforts répétés induisant une fatigue du matériau, conduisant à une tenue dans le temps non satisfaisante.The ferrule comprises, in its mass, tongues in the form of curved and projecting ribs intended to come into force in force in the annular groove of the conducting well. Such a solution subjects the tongues to repeated forces inducing fatigue of the material, leading to unsatisfactory behavior over time.

La demande de brevet EP-A-0 067 780 divulgue une cosse de raccordement coudée, sertie sur un conducteur électrique et comportant des ailes de connexion munies de bossages saillants dont la fonction mécanique d'encliquetage n'est pas constante dans le temps.Patent application EP-A-0 067 780 discloses an angled connection terminal, crimped on an electrical conductor and comprising connection wings provided with projecting bosses whose mechanical snap-on function is not constant over time.

Pour que la fonction de raccordement électrique intervienne dans des conditions satisfaisantes dans le temps, il importe d'assurer une première fonction de contact de surface entre la fiche et le puits et une seconde fonction de verrouillage contribuant à établir un maintien mécanique convenable entre la fiche enfichée et le puits. La première fonction est généralement assurée par la surface périphérique extérieure de la fiche, alors que la seconde fonction découle de la coopération des bossages avec la gorge.For the electrical connection function to operate under satisfactory conditions over time, it is important to provide a first surface contact function between the plug and the well and a second locking function helping to establish a suitable mechanical hold between the plug plugged in and the well. The first function is generally provided by the external peripheral surface of the plug, while the second function results from the cooperation of the bosses with the groove.

Compte tenu de la matière constitutive d'un embout de raccordement du type ci-dessus, on conçoit que l'enfichage et le défichage successifs de la branche de connexion électrique par rapport au puits soumet les ailes de la fiche tubulaire à des contraintes induisant une fatigue mal supportée par la matière constitutive qui, rapidement, perd sa caractéristique de réaction élastique. Les ailes de la fiche tubulaire présentent, alors, un état resserré avec comblement de l'intervalle séparant leurs rives ou bords axiaux se faisant face. Dans un tel cas, les bossages saillants occupent une position en retrait et ne sont plus à même de contribuer à l'établissement de la première fonction de contact de surface, ni d'assurer un maintien mécanique convenable par encliquetage à l'intérieur de la gorge du puits.Given the material of a connection piece of the above type, it is understood that the successive plugging and unpicking of the electrical connection branch relative to the well subjects the wings of the tubular plug to stresses inducing a fatigue poorly supported by the constituent material which quickly loses its characteristic of elastic reaction. The wings of the tubular plug then have a tightened state with filling of the interval separating their edges or facing axial edges. In such a case, the protruding bosses occupy a recessed position and are no longer able to contribute to the establishment of the first surface contact function, nor to provide suitable mechanical support by snap-fastening inside the throat of the well.

L'objet de l'invention est de porter remède à un tel inconvénient en proposant des modifications structurelles des embouts de raccordement électrique à fiche ou douille tubulaire spécifiquement conçus pour coopérer avec un puits conducteur délimitant intérieurement une gorge périphérique.The object of the invention is to remedy such a drawback by proposing structural modifications to the electrical connection end pieces with tubular plug or socket specifically designed to cooperate with a conductive well internally delimiting a peripheral groove.

Les propositions constructives selon la présente invention visent à améliorer les caractéristiques mécaniques des embouts de raccordement électrique du type à fiche tubulaire, que ces embouts soient droits ou coudés.The constructive proposals according to the present invention aim to improve the mechanical characteristics of the electrical connection end pieces of the tubular plug type, whether these end pieces are straight or bent.

Pour atteindre les objectifs ci-dessus, l'embout de raccordement électrique est caractérisé en ce que la branche en forme de fiche ou douille présente un diamètre extérieur légèrement supérieur au diamètre intérieur du puits, délimite dans sa paroi au moins une fenêtre et contient un clip métallique contraint, comportant au moins un bossage engagé dans la fenêtre et faisant saillie hors de l'enveloppe extérieure de la douille pour lui conférer localement une section droite transversale supérieure au diamètre interne du puits.To achieve the above objectives, the electrical connection tip is characterized in that the branch in the form of a plug or socket has an outside diameter slightly greater than the inside diameter of the well, delimits in its wall at least one window and contains a constrained metal clip, comprising at least one boss engaged in the window and projecting out of the external envelope of the sleeve to locally give it a cross-section greater than the internal diameter of the well.

Diverses autres caractéristiques ressortent de la description faite ci-dessous en référence au dessin annexé qui montre, à titre d'exemple non limitatif, une forme de réalisation de l'objet de l'invention.

  • La fig. 1 est une coupe-élévation illustrant un embout de raccordement électrique conforme à l'invention en relation avec une borne complémentaire du type à puits conducteur.
  • La fig. 2 est une coupe transversale prise selon la ligne II-II de la fig. 1.
  • La fig. 3 est une coupe-élévation analogue à la fig. 1, mais montrant l'objet de l'invention dans une autre position caractéristique.
Various other characteristics will emerge from the description given below with reference to the appended drawing which shows, by way of nonlimiting example, an embodiment of the subject of the invention.
  • Fig. 1 is a sectional elevation illustrating an electrical connection end piece according to the invention in relation to an additional terminal of the conductive well type.
  • Fig. 2 is a cross section taken along line II-II of FIG. 1 .
  • Fig. 3 is a sectional elevation similar to FIG. 1 , but showing the object of the invention in another characteristic position.

Les fig. 1 et 2 montrent un embout de raccordement électrique 1 destiné à établir la connexion avec une borne 2 d'un appareil ou accessoire 3 de production ou d'utilisation d'énergie électrique. Figs. 1 and 2 show an electrical connection tip 1 intended to establish the connection with a terminal 2 of an apparatus or accessory 3 for producing or using electrical energy.

La borne 2 est du type comprenant un puits cylindrique conducteur 4 possédant un fond fermé 5 et délimitant, en retrait de son bord d'entrée ouvert 6, une gorge 7. Le puits 4 est réalisé en un matériau conducteur présentant une bonne conductivité électrique et une bonne résistance à la corrosion, par exemple en un alliage d'aluminium, de cuivre ou, encore, en acier inoxydable. Le puits 4 est entouré par une virole 8, en matière isolante, s'élevant notablement au-dessus du bord d'entrée 6. La virole 8 est portée par l'organe 3 en faisant partie intégrante ou non de ce dernier.Terminal 2 is of the type comprising a conductive cylindrical well 4 having a closed bottom 5 and delimiting, set back from its open inlet edge 6 , a groove 7 . The well 4 is made of a conductive material having good electrical conductivity and good corrosion resistance, for example an alloy of aluminum, copper or, again, stainless steel. The well 4 is surrounded by a ferrule 8 , made of insulating material, rising notably above the inlet edge 6 . The ferrule 8 is carried by the member 3 whether or not it is an integral part of the latter.

L'embout de raccordement électrique 1 est représenté au dessin sous la forme d'une cosse droite, mais il doit être considéré que l'objet de l'invention s'appliquerait également à une cosse du type coudée, comme cela est connu dans la technique.The electrical connection terminal 1 is shown in the drawing in the form of a straight terminal, but it should be considered that the object of the invention would also apply to a terminal of the angled type, as is known in technical.

L'embout de raccordement électrique comprend une branche 9 de sertissage et de liaison électrique avec un conducteur 10. De façon connue, la branche 9 délimite deux ailes 11, de préférence annelées ou autrement ondulées, destinées à établir une liaison électrique et mécanique résistante après sertissage sur le conducteur 10.The electrical connection endpiece comprises a branch 9 for crimping and electrical connection with a conductor 10 . In known manner, the branch 9 delimits two wings 11 , preferably corrugated or otherwise wavy, intended to establish a strong electrical and mechanical connection after crimping on the conductor 10 .

L'embout de raccordement électrique comprend, également, une branche de connexion électrique 12 destinée à coopérer avec le puits 4. La branche 12 est solidarisée avec la branche 9 par l'intermédiaire d'une partie 13, dite médiane, de liaison mécanique.The electrical connection end piece also includes an electrical connection branch 12 intended to cooperate with the well 4 . The branch 12 is secured to the branch 9 by means of a part 13 , called the median, of mechanical connection.

La branche de connexion électrique 12 est réalisée sous la forme d'une fiche ou douille tubulaire obtenue par roulage de deux ailes 14 dont les rives ou bords 15 se faisant face sont maintenus à distance pour délimiter entre eux une fente axiale 16. La fiche tubulaire 12 présente, à l'état de repos, un diamètre voisin par excès du diamètre intérieur du puits 4. La branche 12 comprend, par ailleurs, une partie terminale 17 de diamètre ou section droite transversale légèrement inférieure à celle de la fiche tubulaire, de manière à faciliter l'introduction de la fiche dans le puits 4 à partir du bord d'entrée 6. Généralement, la partie terminale 17 est constituée sous la forme d'un bord roulé vers l'intérieur ou encore, de préférence, par des languettes 18, en forme de pétales infléchis vers l'intérieur.The electrical connection branch 12 is produced in the form of a tubular plug or socket obtained by rolling two wings 14 whose edges or edges 15 facing each other are kept at a distance to delimit between them an axial slot 16 . The tubular plug 12 has, in the idle state, a neighboring diameter by excess of the internal diameter of the well 4 . The branch 12 also comprises an end portion 17 of diameter or cross section slightly smaller than that of the tubular plug, so as to facilitate the introduction of the plug into the well 4 from the inlet edge 6 . Generally, the end portion 17 is formed in the form of an edge rolled inwardly or alternatively, preferably, by tongues 18 , in the form of petals bent inwardly.

Selon une disposition de l'invention, l'une au moins et, de préférence, les deux ailes 14 présentent, dans un plan droit transversal P, chacune une fenêtre 19 de toute forme appropriée, par exemple rectangulaire, ménagée dans la partie angulaire comprise entre le bord 15 et le plan axial P₁ perpendiculaire à un plan axial P₂ passant par la fente 16. Les fenêtres 19 sont prévues pour livrer passage à des bossages 20 qui sont formés en saillie par un clip élastique 21 disposé contraint à l'intérieur de la fiche tubulaire 12. Le clip 21 est, de préférence, réalisé en une matière présentant une grande capacité de réaction élastique par rapport à celle constitutive de l'embout et, de préférence, en acier. Le clip 21 se présente sous la forme d'une bague cylindrique présentant une ouverture axiale 22. Les bossages 20 sont formés à proximité de bords 23 délimitant l'ouverture 22, de façon à pouvoir être placés en coïncidence avec les fenêtres 19, lorsque l'ouverture 22 est alignée avec le plan P₂ et, par conséquent, la fente 16. Dans cette position, les deux bossages 20 font alors saillie simultanément par les fenêtres 19 d'une mesure telle que la section droite transversale locale de la fiche tubulaire soit alors supérieure au diamètre interne du puits 4. Le clip 21 est disposé à l'intérieur de la fiche tubulaire 12 pour être maintenu sous contrainte permanente, de manière que sa réaction à la déformation élastique qui lui est imposée tende à solliciter les ailes 14 en ouverture relative.According to one arrangement of the invention, at least one and preferably the two wings 14 have, in a transverse straight plane P , each a window 19 of any suitable shape, for example rectangular, formed in the angular part included between the edge 15 and the axial plane P₁ perpendicular to an axial plane P₂ passing through the slot 16 . The windows 19 are provided to allow passage to bosses 20 which are projecting by an elastic clip 21 arranged constrained inside the tubular plug 12 . The clip 21 is preferably made of a material having a high capacity for elastic reaction relative to that constituting the end piece and, preferably, of steel. The clip 21 is in the form of a cylindrical ring having an axial opening 22 . The bosses 20 are formed near edges 23 delimiting the opening 22 , so that they can be placed in coincidence with the windows 19 , when the opening 22 is aligned with the plane P₂ and, consequently, the slot 16 . In this position, the two bosses 20 then protrude simultaneously through the windows 19 by a measurement such that the local cross-section of the tubular plug is then greater than the internal diameter of the well 4 . The clip 21 is placed inside the tubular plug 12 to be kept under permanent stress, so that its reaction to the elastic deformation which is imposed on it tends to urge the wings 14 in relative opening.

L'embout de raccordement selon l'invention, tel que décrit ci-dessus, peut être enfiché par la fiche 12 à l'intérieur du puits 4 par engagement de la partie terminale 17 ayant pour effet de solliciter progressivement les ailes 14 en rétreint radial permis par la fente 16. Cette contrainte est retransmise au clip 21 qui est, ainsi, sollicité élastiquement.The connection end piece according to the invention, as described above, can be inserted by the plug 12 inside the well 4 by engagement of the end portion 17 having the effect of gradually urging the wings 14 in radial constriction enabled through slot 16 . This constraint is retransmitted to clip 21 which is thus elastically stressed.

L'introduction de la fiche tubulaire 12 se poursuit axialement dans le sens de la flèche f₁ avec établissement d'une fonction de contact de surface largement répartie entre la périphérie extérieure de la fiche tubulaire et la surface périphérique intérieure du puits 4 en raison de la réaction du clip 21. Une contrainte supplémentaire est imposée au clip 21 lors de l'engagement des bossages 20 à partir du bord d'entrée 6, sans que toutefois cette contrainte supplémentaire ne soit appliquée aux ailes 14. Les bossages 20 s'encliquètent automatiquement dans la gorge 7, lorsque le plan P coïncide avec le plan P₃ de cette dernière, par la simple réaction du clip 21.The insertion of the tubular plug 12 continues axially in the direction of the arrow f₁ with establishment of a surface contact function widely distributed between the outer periphery of the tubular plug and the inner peripheral surface of the well 4 due to the clip reaction 21 . An additional constraint is imposed on the clip 21 during the engagement of the bosses 20 from the entry edge 6 , without however this additional constraint being applied to the wings 14 . The bosses 20 snap automatically into the groove 7 , when the plane P coincides with the plane P₃ of the latter, by the simple reaction of the clip 21 .

Dans cette position, illustrée par la fig. 3, les bossages 20 assurent un maintien mécanique entre la fiche tubulaire et le puits 4 en raison de leur engagement dans la gorge périphérique 7. Ces bossages contribuent, également, à plaquer fermement la partie de la paroi périphérique de la fiche 12 située à l'opposé du plan P₁ par rapport à eux-mêmes et contribuent, ainsi, à maintenir un contact de surface le plus large possible pour l'établissement d'une fonction de connexion électrique.In this position, illustrated in FIG. 3 , the bosses 20 provide mechanical support between the tubular plug and the well 4 due to their engagement in the peripheral groove 7 . These bosses also contribute to firmly pressing the part of the peripheral wall of the plug 12 situated opposite the plane P₁ relative to themselves and thus contribute to maintaining the widest possible surface contact for the 'establishment of an electrical connection function.

L'extraction de la fiche 12 est obtenue en agissant par traction sur l'embout 1, de manière à provoquer l'effacement des bossages à travers les fenêtres 19 pour faciliter le glissement axial de la fiche ou douille tubulaire par rapport au puits 4.The extraction of the plug 12 is obtained by acting on the end piece 1 by pulling, so as to cause the bosses to be erased through the windows 19 to facilitate the axial sliding of the plug or tubular sleeve relative to the well 4 .

Après dégagement axial, le clip 21 reprend sa position initiale en contraignant les ailes 14 en ouverture radiale. Ainsi, des enfichages et défichages successifs ne produisent pas, comme dans les embouts de raccordement actuellement connus, un fléchissement des ailes à un point tel que le diamètre extérieur de la fiche ou douille tubulaire devienne inférieur à celui interne du puits 4 au point de n'établir qu'une liaison électrique aléatoire, notamment en cas de vibrations.After axial release, the clip 21 returns to its initial position by constraining the wings 14 in radial opening. Thus, successive plugs and unplugs do not produce, as in the connection fittings currently known, a deflection of the wings at a point such that the outside diameter of the tubular plug or socket becomes less than that internal of the well 4 at the point of n '' establish a random electrical connection, especially in the event of vibrations.

La douille est, également, avantageusement réalisée de manière que la distance axiale d, comprise entre le plan droit transversal P de la douille passant par les fenêtres 19 et le plan P₁ du bord extrême de la douille, délimité par la partie terminale 17, soit sensiblement égale ou légèrement inférieure à la distance axiale D séparant le plan transversal P₃ de la gorge 7 du plan défini par le fond 5 du puits 4.The socket is also advantageously made so that the axial distance d , between the transverse straight plane P of the socket passing through the windows 19 and the plane P₁ from the extreme edge of the sleeve, delimited by the terminal part 17 , either substantially equal to or slightly less than the axial distance D separating the transverse plane P₃ from the groove 7 from the plane defined by the bottom 5 of the well 4 .

L'invention n'est pas limitée à l'exemple décrit et représenté, car diverses modifications peuvent y être apportées sans sortir de son cadre.The invention is not limited to the example described and shown, since various modifications can be made thereto without departing from its scope.

Claims (4)

1 - Embout de raccordement électrique, du type comprenant une branche (9) de sertissage et de liaison électrique avec un conducteur, une branche (12) sensiblement tubulaire en forme de douille ou fiche, déformable élastiquement pour la connexion avec une borne complémentaire (2) constituée par un puits conducteur (4), de forme générale cylindrique, délimitant une gorge annulaire (7), et une partie médiane (13) de liaison mécanique desdites branches,
caractérisé en ce que la branche (12), en forme de fiche ou douille, présente un diamètre extérieur légèrement supérieur au diamètre intérieur du puits, délimite dans sa paroi au moins une fenêtre (19) et contient un clip métallique (21) contraint, comportant au moins un bossage (20) engagé dans la fenêtre et faisant saillie hors de l'enveloppe extérieure de la douille pour lui conférer localement une section droite transversale supérieure au diamètre interne du puits. 1 - Electrical connection end piece, of the type comprising a branch (9) for crimping and electrical connection with a conductor, a branch (12) substantially tubular in the form of a socket or plug, elastically deformable for connection with an additional terminal (2 ) constituted by a conductive well (4) , of generally cylindrical shape, delimiting an annular groove (7) , and a median part (13) of mechanical connection of said branches,
characterized in that the branch (12) , in the form of a plug or socket, has an outside diameter slightly greater than the inside diameter of the well, delimits in its wall at least one window (19) and contains a constrained metal clip (21) , comprising at least one boss (20) engaged in the window and projecting out of the outer casing of the sleeve to locally give it a cross section greater than the internal diameter of the well. 2 - Embout de raccordement selon la revendication 1, caractérisé en ce que la douille contient un clip (21) constitué par une bague présentant une ouverture axiale (22) et comportant deux bossages (20) formés à proximité des bords de l'ouverture. 2 - connecting piece according to claim 1 , characterized in that the sleeve contains a clip (21) consisting of a ring having an axial opening (22) and comprising two bosses (20) formed near the edges of the opening. 3 - Embout de raccordement selon la revendication 1 ou 2, caractérisé en ce que la douille présente une fente axiale (16) et comporte des fenêtres (19) situées à proximité des bords de ladite fente. 3 - connecting piece according to claim 1 or 2, characterized in that the sleeve has an axial slot (16) and has windows (19) located near the edges of said slot. 4 - Embout de raccordement selon l'une des revendications 1 à 3, caractérisé en ce que la douille est réalisée de manière que la distance axiale, comprise entre le plan droit transversal (P) de la douille passant par les fenêtres (19) et le plan du bord extrême de la douille, soit sensiblement égale ou légèrement inférieure à la distance axiale séparant le plan transversal (P₃) de la gorge (7) du fond (5) du puits (4). 4 - Connection end piece according to one of claims 1 to 3, characterized in that the sleeve is produced so that the axial distance, comprised between the transverse straight plane (P) of the sleeve passing through the windows (19) and the plane of the extreme edge of the sleeve, either substantially equal to or slightly less than the axial distance separating the transverse plane (P₃) of the groove (7) of the bottom (5) of the well (4) .
EP89420032A 1988-02-04 1989-02-03 Electrical connection terminal Withdrawn EP0327478A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8801478 1988-02-04
FR8801478A FR2627018B1 (en) 1988-02-04 1988-02-04 ELECTRICAL CONNECTION PLUG

Publications (1)

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EP0327478A1 true EP0327478A1 (en) 1989-08-09

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EP89420032A Withdrawn EP0327478A1 (en) 1988-02-04 1989-02-03 Electrical connection terminal

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EP (1) EP0327478A1 (en)
FR (1) FR2627018B1 (en)
PT (1) PT89644B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU640573B2 (en) * 1991-09-03 1993-08-26 General Motors Corporation Spark plug connector and terminal assembly therefor
EP0660474A1 (en) * 1993-12-23 1995-06-28 General Motors Corporation Ignition cable assembly
EP0718927A1 (en) * 1993-10-29 1996-06-26 INTERLOCK CORPORATION (a Michigan corporation) Low insertion force terminal assembly
EP2112721A1 (en) * 2008-04-23 2009-10-28 Satrotec AG Tight plug-connetion for high voltage wires in automobile manufacturing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1320252A (en) * 1961-02-27 1963-03-08 Amp Inc Electrical connectors
US3689866A (en) * 1970-09-11 1972-09-05 William Kelly Heavy duty cable connector
EP0067780A1 (en) * 1981-06-11 1982-12-22 Société à Responsabilité Limitée L'ELECTRICFIL INDUSTRIE Bent end piece for electrical connections

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1320252A (en) * 1961-02-27 1963-03-08 Amp Inc Electrical connectors
US3689866A (en) * 1970-09-11 1972-09-05 William Kelly Heavy duty cable connector
EP0067780A1 (en) * 1981-06-11 1982-12-22 Société à Responsabilité Limitée L'ELECTRICFIL INDUSTRIE Bent end piece for electrical connections

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU640573B2 (en) * 1991-09-03 1993-08-26 General Motors Corporation Spark plug connector and terminal assembly therefor
EP0718927A1 (en) * 1993-10-29 1996-06-26 INTERLOCK CORPORATION (a Michigan corporation) Low insertion force terminal assembly
EP0660474A1 (en) * 1993-12-23 1995-06-28 General Motors Corporation Ignition cable assembly
EP2112721A1 (en) * 2008-04-23 2009-10-28 Satrotec AG Tight plug-connetion for high voltage wires in automobile manufacturing

Also Published As

Publication number Publication date
FR2627018B1 (en) 1990-08-03
PT89644A (en) 1989-10-04
PT89644B (en) 1994-10-31
FR2627018A1 (en) 1989-08-11

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