EP2424047A1 - Female electric contact, connector assembly and manufacturing method - Google Patents

Female electric contact, connector assembly and manufacturing method Download PDF

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Publication number
EP2424047A1
EP2424047A1 EP11177337A EP11177337A EP2424047A1 EP 2424047 A1 EP2424047 A1 EP 2424047A1 EP 11177337 A EP11177337 A EP 11177337A EP 11177337 A EP11177337 A EP 11177337A EP 2424047 A1 EP2424047 A1 EP 2424047A1
Authority
EP
European Patent Office
Prior art keywords
connection end
electrical contact
diameter
annular groove
female
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11177337A
Other languages
German (de)
French (fr)
Other versions
EP2424047B1 (en
Inventor
Pascal Ribeau
Serge Leroyer
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.)
Souriau SAS
Original Assignee
Souriau SAS
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Filing date
Publication date
Application filed by Souriau SAS filed Critical Souriau SAS
Publication of EP2424047A1 publication Critical patent/EP2424047A1/en
Application granted granted Critical
Publication of EP2424047B1 publication Critical patent/EP2424047B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/10—Sockets for co-operation with pins or blades
    • H01R13/11—Resilient sockets
    • H01R13/111—Resilient sockets co-operating with pins having a circular transverse section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/18—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the socket
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/533—Bases, cases made for use in extreme conditions, e.g. high temperature, radiation, vibration, corrosive environment, pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing

Definitions

  • the invention relates to a female electrical contact intended to be provided, around one of its connection ends, with a tightening element able to maintain said connection end in a constrained state in order to reduce its connection diameter. More particularly, the invention relates to a housing formed on the wall of the electrical contact, and for receiving and holding in position said retightening element. The invention also relates to a connector assembly comprising at least one such female electrical contact. The invention also relates to a method for producing such a female electrical contact.
  • connecting elements In the field of connectivity, it is sometimes necessary, especially for aeronautics and automotive applications, to use connecting elements able to maintain their electrical connections in extreme conditions. Indeed, the electrical connections can be subjected to strong vibrations and / or high temperature differentials, tending to deteriorate the electrical connection between two complementary contacts.
  • a connecting end of a female electrical contact, or socket is specifically sized to receive a complementary male or pin contact.
  • the materials used namely copper alloys such as brass or bronze, are chosen for their ability to maintain their mechanical properties in temperature in order to prevent unwanted expansion from eliminating the electrical connection.
  • a female electrical contact, or socket such as a female power contact
  • an annular tightening element in order to tighten the wall of the sleeve around the pin, and thus to favor the maintenance of the electrical connection even in case of strong vibrations and / or temperatures.
  • the characteristics of the materials used for this ring-tightening element are such that their elasticity is maintained for temperatures above 200 ° C.
  • the figure 1 shows a partial longitudinal section of such a female electrical contact 1 at the tightened connection end 6.
  • the sleeve 1 comprises a socket body 2 of generally circular cylindrical shape.
  • Longitudinal slots are provided in the socket body, extending along the longitudinal axis A, from the opening 11 of the connecting end 6, and over a partial length of the socket body 2.
  • at least two longitudinal slots are provided on the connecting end 6.
  • connection diameter DA corresponding to the internal diameter at the opening 11 of said end 6, reduced relative to the internal diameter DB of the rest of the body of sleeve 2.
  • the diameter DA is bordered by the inner surface 9 of the wall 5 of the female contact 1.
  • connection diameters DA and DB are determined according to the diameter D of the pin which must be introduced, so as to have DA ⁇ D ⁇ DB.
  • the inner surface 9 of the wall 5 at the connecting end 6 must be contiguous with a pressure on the outer wall of the spindle, and this pressure must be maintained, in order to guarantee the electrical connection between these two elements.
  • the deformation is such that the connecting end 6 has a frustoconical longitudinal section, the internal diameter of the cavity being increasing from the connection diameter DA at the opening 11 to DB at the bottom of the cavity.
  • An annular groove 3 is dug from the outer surface 4 of the wall 5 of the socket body 2 to receive a retightening ring.
  • the groove 3 extends over an entire outer perimeter of the connecting end 6 of the sleeve 1.
  • Stop lips 8 are formed upstream of the groove 3.
  • the groove 3 is bordered upstream by the lips of stop 8, and downstream by the wall 5 of the non-machined socket body 2. Upstream and downstream means in relation to the direction of the connection at the end considered.
  • a bottom 7 of the groove 3 is inclined at an angle X with respect to a longitudinal axis A of the socket body 2, corresponding to the tightening angle applied to the connection end 6 to obtain the connection diameter DA wish.
  • the tightening ring 10 is housed in the groove 3 so as to surround the connection end 6.
  • the tightening ring 10 is conventionally tubular in shape, and has a cross section with respect to the axis A, so that that it does not rest on all its length on the bottom 7 of the throat 3.
  • said tightening ring 10 is slid along the wall 5 of the socket body 2, from the abutment lips 8 bordering the opening 11.
  • the tightening ring 10 must therefore pass above the stop lips 8 before ending in the groove 3.
  • an external diameter D1 of the connection end 6 at the abutment lips 8 is greater than a diameter.
  • internal diameter is meant the diameter measured from the inner surface of the element considered, while the outer diameter corresponds to the diameter measured from the external surface of the considered element.
  • the tightening ring 10 is generally made of material capable of withstanding high temperatures, while retaining its elastic properties thus giving a spring effect.
  • the invention proposes machining at the connection end of interest a groove against undercut, the angle of the undercut corresponding substantially to the tightening angle to obtain the desired reduced diameter at the level of said connection end.
  • the groove is arranged so that its bottom is inclined longitudinally.
  • the bottom of the undercut groove has, before the tightening of the first connection end, a slope relative to the longitudinal axis of the female electrical contact such that the diameter of the front end of the throat against clearance is greater than the diameter of the rear end of said groove against undercut.
  • front and rear, or upstream and downstream are understood in relation to the direction of the connection at the connection end considered.
  • the diameter of the groove is considered at the bottom of said groove.
  • the groove has a cross section, parallel to the longitudinal axis of the contact.
  • An annular tightening element such as a ring, also having a cross section, can then be used optimally, since its entire surface rests evenly on the bottom of the groove.
  • the diameter of the connection end at the abutment lips is reduced compared to the system of the state of the art described above, making less the spacing to be subjected to the tightening element to pass this stop .
  • the subject of the invention is therefore a female electrical contact of generally cylindrical circular shape comprising two connection ends, at least one first connection end having at least two longitudinal slots, said first connection end being able to present two states, respectively state unstressed, wherein said first connection end has a straight longitudinal section, and stressed state, wherein said first connection end has a frustoconical longitudinal section, an annular groove being hollowed from an outer surface of the wall of the female electrical contact, at the level of first connection end, intended to receive a tightening element, characterized in that the annular groove, when the first connection end is in the unconstrained state, has a frustoconical longitudinal section, so that the diameter of a front end of the annular groove is greater than the diameter of an end. rear of said annular groove, and in that the annular groove has, when the first connection end is in the constrained state, a cross section.
  • the unconstrained state is the state in which the contact is before being tightened to have a reduced connection diameter at one of its two connection ends.
  • connection ends When one of the two connection ends is deformed / tightened, to reduce its opening diameter, the rest of the contact body and the second connection end are not deformed and continues to have a circular cylindrical shape.
  • the deformation / constraint is only local.
  • connection diameter is meant the internal diameter of the contact at the connection end considered.
  • reduced diameter it is meant that the diameter in question is smaller than the diameter of the remainder of the cylindrical circular contact.
  • connection end extends over a certain length of the connection end, sufficient to receive a ring-like tightening element, able to maintain a tightening pressure around said connection end and to allow a maintenance of the reduced connection diameter in all circumstances.
  • Length means the dimension extending parallel to the longitudinal axis of the element in question.
  • the constrained state is obtained mechanically, by tightening the opening diameter at the connection end. Tightening the connection end tends to bring the bottom of the groove parallel to the longitudinal axis of the contact.
  • the inclination of the groove decreases to be almost zero, given that due to manufacturing constraints, a slight inclination relative to the longitudinal axis, in one direction or the other, may be acceptable.
  • Longitudinal section means a section in a longitudinal plane of the female electrical contact.
  • the annular groove has, in the unconstrained state of the first connection end, a slope having an angle with respect to a longitudinal axis of the female electrical contact substantially equal to a tightening angle to be applied to the first end of the connection to go to the constrained state and get a reduced connection diameter.
  • the female electrical contact may comprise a retightening element disposed in the annular groove, and adapted to maintain the first connection end in the constrained state, said retightening element having a right longitudinal section.
  • the annular retightening element is intended to be mounted on the connection end once it is in the constrained / constricted state.
  • the tightening element must be able to maintain the connection end in the constrained state even when large forces are applied, tending to return said connection end in an unconstrained state.
  • the retightening element has mechanical properties such as elasticity, which make it particularly suitable for operation at temperatures above 200 ° C.
  • the front end of the annular groove is bordered by stop lips.
  • abutment lips may for example be obtained by machining the groove downstream of the opening of the connection end, so that said groove is not open at said opening.
  • the underneath wall of the contact upstream of the groove forms the abutment lips.
  • these stop lips can be attached to the connection end and fixed in particular by welding.
  • the groove is thus bordered by two vertical walls and the outer diameter of the contact at said abutment lips, as well as downstream of the groove, is greater than the external diameter of the contact at the bottom of the groove. Likewise, the external diameter at the level of said abutment lips, and downstream of the groove, is greater than the internal diameter of the retightening element, which ensures once it is in place that the retightening element remains in position in the groove.
  • the tightening element may for example be a split cylindrical circular ring.
  • the slot thus facilitates the passage of the stop lips without exerting too much stress on the ring.
  • the tightening element may otherwise be a cylindrical circular helical spring, the manufacturing cost of such a spring is often less.
  • the invention also relates to a connector assembly comprising an insert provided with at least one through cavity, intended to receive two complementary electrical contacts, said connector assembly comprising at least one female electrical contact, or socket, according to the invention, and at least one a male electrical contact, or pin, complementary, adapted to be inserted in at least one through cavity of the insert.
  • the male and female contacts are each introduced into a cavity of the insert considered, by an opposite end, so that a connection area between the two complementary electrical contacts is located inside said cavity.
  • FIG. 2 On the figure 2 is shown an embodiment of a female electrical contact 100 according to the invention.
  • the female electrical contact 100 comprises a sleeve body 101, generally cylindrical in shape with circular section, or circular cylindrical, hollow.
  • the two ends 102, 103 of the cylinder are open and provide connecting ends, each intended to receive a complementary male electrical contact, or pin, or cable.
  • the connection end 102 for receiving a pin is split longitudinally.
  • the two slots 104 make it easier to tighten said end 102 without overlapping material.
  • a wall 105 of the socket body 101 is hollowed from an outer surface 106, so as to provide an annular groove 107 against undercut.
  • a slotted annular sealing member 108 surrounds an outer perimeter of the socket body 101. The tightening ring 108 is more precisely housed in the annular groove 107, in which it is held in position, in particular by virtue of the stop lips 109.
  • FIGS. 3A, 3B and 3C show more precisely the undercut shape of the annular groove 107 ( figure 3A ) in the unconstrained state ( figure 3A ) and the cross-sectional shape of said annular groove 107 in the stressed state ( Figures 3B and 3C ).
  • the annular groove 107 is hollowed out or machined on the socket body 101 at an angle from the external surface 106 of the wall 105, which extends substantially parallel to a longitudinal axis A 'of the socket body 101.
  • an upstream depth p of the annular groove 107 is less than a downstream depth p 'of said groove 107.
  • depth is meant the dimension extending radially with respect to the axis A'.
  • the outer diameter at the upstream level of the annular groove 107 is greater than the outside diameter at the downstream level of the annular groove 107.
  • the bottom 110 of the groove 107 flat, extends along an axis I inclined at an angle X1 with respect to the longitudinal axis A '.
  • An inner diameter D 'of the opening 111 of the connecting end 102 corresponds to the general internal diameter of the socket body 101.
  • the angle X1 is advantageously predetermined as a function of the tightening angle X2 which will then be applied to the connection end 102, so that once the tightening is done, the bottom 110 of the groove 107 extends substantially parallel to the axis A 'of the contact 100.
  • the tightening angle X2 must correspond to the angle to be applied to obtain a reduced connection diameter D "( figure 3B ) adapted to allow the electrical connection with a complementary male contact.
  • the reduced connection diameter D corresponds to the internal diameter of the connection end at the level of the opening 111.
  • the angle X1 is substantially equal to the tightening angle X2.
  • the groove 107 is made at a distance from the opening 111 of the connection end 102, so as to provide stop lips 109 upstream of the groove 107.
  • connection end 102 is then tightened so as to reduce the diameter of the opening 111 until the reduced diameter D "corresponding to the desired diameter is obtained, depending on the dimensions of the pin to be inserted.
  • the wall 105 of the socket body 101 is thus locally inclined by the angle X2, whereas the bottom 110 of the groove 107 is parallel to the axis A.
  • the external diameter at the Annular groove 107 is constant over its entire length.Length means the dimension extending substantially parallel to the longitudinal axis A '.
  • connection end 102 is frustoconical.
  • the inner diameter and the outer diameter of the connecting end are increasing, from the opening 111 having the reduced inside diameter D ", to a partition wall 112 ( figure 4 ) separating the two connection ends 102, 103.
  • the remainder of the socket body 101, as visible on the figure 2 is not deformed by this step of tightening the connection end 102, whose internal diameter remains equal to the initial diameter D '.
  • the connection end 102 has at the stop lips 109 an outer diameter D1 'greater than the internal diameter D2' of the tightening ring 108.
  • the groove 107 having at this time a cross-section, the external diameter D1 'at the abutment lips of the bushing 100 is strictly smaller than the outside diameter D1 at the abutment lips of a bushing 1 ( figure 1 ) of the state of the art of equivalent dimensions.
  • the difference in diameter between D1 'and D2' is between 0.2mm and 0.8mm, whereas for a sleeve 1 of the state of the art, the difference in diameter between D1 and D2 ( figure 1 ) is rather between 1 mm and 1.2mm.
  • This difference in the differences in diameters makes it possible to prevent the tightening ring 108 from being subjected to constraints such that it changes to a penalizing plastic state. It is therefore possible to use for the tightening ring 108, or generally for the tightening element, less elastic materials such as simple brasses ensuring a better holding of the tightening of the connecting end 102 and so the connection between the socket and the associated pin.
  • the tightening ring 108 is then slid along the outer surface 106 of the wall 105 of the socket body 101 until it is completely contained in the groove 107 ( figure 3C ).
  • the upstream and downstream depths p 'of the groove 107 are sufficient to prevent the involuntary withdrawal of the retightening ring 108.
  • the retightening ring 108 being of cross section, it extends along its entire length parallel to the bottom 110. of the groove 107, so that the stresses exerted by said tightening ring 108 on the connecting end 102 are substantially constant.
  • the figure 4 shows a female electrical contact 100 according to the invention, connected at a connection end 102 with a reduced connection diameter to a complementary male electrical contact 200.
  • the outer diameter D1 'at the stop lips 109 is 6.8mm, while the internal diameter D2' of the retightening element 108 (here a cylindrical circular helical spring) is 6.5 mm.
  • connection end 102 of the female contact 100 is forced into the connection end 102 of the female contact 100, and the retightening element 108 ensures that the reduced connection diameter D "is maintained.

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  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The contact has a connection end (102) comprising non-stressed and stressed states in which the end provides straight and truncated longitudinal sections. An annular groove (107) is hollowed out from an external surface (106) of a wall (105) of the contact at the end for receiving an annular tightening ring (108). The groove has a truncated longitudinal section when the end is in the non-stressed state, so that diameter of front end of the groove is greater than that of rear end of the groove. The groove has a cross section when the end is in the stressed state. Independent claims are also included for the following: (1) a connector assembly, comprising a female electric contact (2) a method for producing a female electric contact.

Description

L'invention concerne un contact électrique femelle destiné à être muni, autour d'une de ses extrémités de connexion, d'un élément de resserrage apte à maintenir ladite extrémité de connexion dans un état contraint pour réduire son diamètre de connexion. Plus particulièrement, l'invention concerne un logement ménagé sur la paroi du contact électrique, et destiné à recevoir et maintenir en position ledit élément de resserrage. L'invention concerne également un ensemble connecteur comportant au moins un tel contact électrique femelle. L'invention concerne aussi un procédé de réalisation d'un tel contact électrique femelle.The invention relates to a female electrical contact intended to be provided, around one of its connection ends, with a tightening element able to maintain said connection end in a constrained state in order to reduce its connection diameter. More particularly, the invention relates to a housing formed on the wall of the electrical contact, and for receiving and holding in position said retightening element. The invention also relates to a connector assembly comprising at least one such female electrical contact. The invention also relates to a method for producing such a female electrical contact.

Dans le domaine de la connectique, il est parfois nécessaire, notamment pour des utilisations en aéronautique et dans l'automobile, d'utiliser des éléments de connexion aptes à maintenir leurs connexions électriques dans des conditions extrêmes. En effet, les connexions électriques peuvent être soumises à de fortes vibrations et/ou des différentiels de températures élevés, tendant à détériorer la liaison électrique entre deux contacts complémentaires.In the field of connectivity, it is sometimes necessary, especially for aeronautics and automotive applications, to use connecting elements able to maintain their electrical connections in extreme conditions. Indeed, the electrical connections can be subjected to strong vibrations and / or high temperature differentials, tending to deteriorate the electrical connection between two complementary contacts.

Généralement, une extrémité de connexion d'un contact électrique femelle, ou douille, est spécifiquement dimensionnée pour recevoir un contact mâle, ou broche, complémentaire. Les matériaux utilisés, à savoir des alliages cuivreux comme le laiton ou le bronze, sont choisis pour leur aptitude à maintenir leurs caractéristiques mécaniques en température afin d'éviter que des dilatations intempestives suppriment la liaison électrique.Generally, a connecting end of a female electrical contact, or socket, is specifically sized to receive a complementary male or pin contact. The materials used, namely copper alloys such as brass or bronze, are chosen for their ability to maintain their mechanical properties in temperature in order to prevent unwanted expansion from eliminating the electrical connection.

La plupart de ces matériaux présentent le plus souvent une perte de leur élasticité lorsqu'ils sont soumis à des températures supérieures à 200°C, de sorte que lorsque la broche est introduite dans la douille, il n'y a pas nécessairement un resserrage suffisant de ladite douille autour de ladite broche lorsque la température approche ou dépasse les 200°C.Most of these materials most often have a loss of elasticity when subjected to temperatures above 200 ° C, so that when the pin is inserted into the socket, there is not necessarily sufficient tightening said bushing around said spindle when the temperature approaches or exceeds 200 ° C.

Aussi, il est connu d'utiliser un contact électrique femelle, ou douille, tel qu'un contact femelle de puissance, muni d'un élément de resserrage annulaire afin de venir resserrer la paroi de la douille autour de la broche, et ainsi favoriser le maintien de la connexion électrique même en cas de fortes vibrations et/ou températures.Also, it is known to use a female electrical contact, or socket, such as a female power contact, provided with an annular tightening element in order to tighten the wall of the sleeve around the pin, and thus to favor the maintenance of the electrical connection even in case of strong vibrations and / or temperatures.

Les caractéristiques des matériaux utilisés pour cet élément de resserrage annulaire sont telles, que leur élasticité est maintenue pour des températures supérieures à 200°C.The characteristics of the materials used for this ring-tightening element are such that their elasticity is maintained for temperatures above 200 ° C.

La figure 1 montre une coupe longitudinale partielle d'un tel contact électrique femelle 1 au niveau de l'extrémité de connexion 6 resserrée.The figure 1 shows a partial longitudinal section of such a female electrical contact 1 at the tightened connection end 6.

Plus précisément, la douille 1 comporte un corps de douille 2 de forme générale circulaire cylindrique. Des fentes longitudinales sont ménagées dans le corps de douille, s'étendant selon l'axe longitudinal A, depuis l'ouverture 11 de l'extrémité de connexion 6, et sur une longueur partielle du corps de douille 2. Généralement, au moins deux fentes longitudinales sont ménagées sur l'extrémité de connexion 6.More specifically, the sleeve 1 comprises a socket body 2 of generally circular cylindrical shape. Longitudinal slots are provided in the socket body, extending along the longitudinal axis A, from the opening 11 of the connecting end 6, and over a partial length of the socket body 2. Generally, at least two longitudinal slots are provided on the connecting end 6.

Seule l'extrémité de connexion 6 considérée a été resserrée, de manière à présenter un diamètre de connexion DA, correspondant au diamètre interne au niveau de l'ouverture 11 de ladite extrémité 6, réduit par rapport au diamètre interne DB du reste du corps de douille 2. Le diamètre DA est bordé par la surface interne 9 de la paroi 5 du contact femelle 1.Only the connecting end 6 considered has been tightened, so as to have a connection diameter DA, corresponding to the internal diameter at the opening 11 of said end 6, reduced relative to the internal diameter DB of the rest of the body of sleeve 2. The diameter DA is bordered by the inner surface 9 of the wall 5 of the female contact 1.

Les diamètres de connexion DA et DB sont déterminés en fonction du diamètre D de la broche qui doit être introduite, de manière à avoir DA<D<DB. En effet, la surface interne 9 de la paroi 5 au niveau de l'extrémité de connexion 6 doit être accolée avec une pression à la paroi externe de la broche, et cette pression doit être maintenue, afin de garantir la connexion électrique entre ces deux éléments. Ainsi, la déformation est telle que l'extrémité de connexion 6 présente une section longitudinale tronconique, le diamètre interne de la cavité étant croissant depuis le diamètre de connexion DA au niveau de l'ouverture 11 vers DB au fond de la cavité.The connection diameters DA and DB are determined according to the diameter D of the pin which must be introduced, so as to have DA <D <DB. Indeed, the inner surface 9 of the wall 5 at the connecting end 6 must be contiguous with a pressure on the outer wall of the spindle, and this pressure must be maintained, in order to guarantee the electrical connection between these two elements. Thus, the deformation is such that the connecting end 6 has a frustoconical longitudinal section, the internal diameter of the cavity being increasing from the connection diameter DA at the opening 11 to DB at the bottom of the cavity.

Une gorge 3 annulaire est creusée depuis la surface externe 4 de la paroi 5 du corps de douille 2, pour recevoir un anneau de resserrage. La gorge 3 s'étend sur tout un périmètre externe de l'extrémité de connexion 6 de la douille 1. Des lèvres de butée 8 sont ménagées en amont de la gorge 3. Ainsi, la gorge 3 est bordée en amont par les lèvres de butée 8, et en aval par la paroi 5 du corps de douille 2 non usinée. Par amont et aval, on entend par rapport au sens de la connexion au niveau de l'extrémité considérée.An annular groove 3 is dug from the outer surface 4 of the wall 5 of the socket body 2 to receive a retightening ring. The groove 3 extends over an entire outer perimeter of the connecting end 6 of the sleeve 1. Stop lips 8 are formed upstream of the groove 3. Thus, the groove 3 is bordered upstream by the lips of stop 8, and downstream by the wall 5 of the non-machined socket body 2. Upstream and downstream means in relation to the direction of the connection at the end considered.

Un fond 7 de la gorge 3 se trouve incliné d'un angle X par rapport à un axe longitudinal A du corps de douille 2, correspondant à l'angle de resserrage appliqué à l'extrémité de connexion 6 pour obtenir le diamètre de connexion DA souhaité.A bottom 7 of the groove 3 is inclined at an angle X with respect to a longitudinal axis A of the socket body 2, corresponding to the tightening angle applied to the connection end 6 to obtain the connection diameter DA wish.

L'anneau de resserrage 10 est logé dans la gorge 3 de manière à entourer l'extrémité de connexion 6. L'anneau de resserrage 10 a classiquement une forme tubulaire, et présente une section droite par rapport à l'axe A, de sorte qu'il ne repose pas sur toute sa longueur sur le fond 7 de la gorge 3.The tightening ring 10 is housed in the groove 3 so as to surround the connection end 6. The tightening ring 10 is conventionally tubular in shape, and has a cross section with respect to the axis A, so that that it does not rest on all its length on the bottom 7 of the throat 3.

Pour loger l'anneau de resserrage 10 dans la gorge 3, on fait coulisser ledit anneau de resserrage 10 le long de la paroi 5 du corps de douille 2, depuis les lèvres de butée 8 bordant l'ouverture 11.To accommodate the tightening ring 10 in the groove 3, said tightening ring 10 is slid along the wall 5 of the socket body 2, from the abutment lips 8 bordering the opening 11.

L'anneau de resserrage 10 doit donc passer au dessus des lèvres de butée 8 avant d'aboutir dans la gorge 3. Or, un diamètre externe D1 de l'extrémité de connexion 6 au niveau des lèvres de butée 8 est supérieur à un diamètre interne D2 de l'anneau de resserrage 10, puisque lesdites lèvres de butée doivent interdire le retrait intempestif dudit anneau de resserrage 10. Par diamètre interne, on entend le diamètre mesuré depuis la surface interne de l'élément considéré, tandis que le diamètre externe correspond au diamètre mesuré depuis la surface externe de l'élément considéré.The tightening ring 10 must therefore pass above the stop lips 8 before ending in the groove 3. However, an external diameter D1 of the connection end 6 at the abutment lips 8 is greater than a diameter. internal D2 of the tightening ring 10, since said abutment lips must prohibit the inadvertent withdrawal of said tightening ring 10. By internal diameter is meant the diameter measured from the inner surface of the element considered, while the outer diameter corresponds to the diameter measured from the external surface of the considered element.

L'anneau de resserrage 10 est généralement en matériau apte à supporter des températures élevées, tout en conservant ses propriétés élastiques donnant ainsi un effet ressort.The tightening ring 10 is generally made of material capable of withstanding high temperatures, while retaining its elastic properties thus giving a spring effect.

Il arrive souvent que de tels matériaux présentent des caractéristiques élastiques sur des plages de fonctionnement réduites, et que de fortes déformations liées à des opérations de montage les fassent passer d'un domaine élastique à un domaine plastique, avec pour conséquence la perte de l'effet ressort.It often happens that such materials have elastic characteristics over reduced operating ranges, and that large deformations related to assembly operations cause them to move from an elastic domain to a plastic domain, with the consequence that they are lost. spring effect.

Aussi, il est courant que les contraintes imposées à l'anneau de resserrage 10 lors du passage des lèvres de butée 8, par-dessus le diamètre D1 notamment, le fasse passer à l'état plastique compte tenu de la forte déformation imposée. L'anneau de resserrage 10 n'est alors plus en mesure de remplir correctement sa fonction de resserrage et de maintien du diamètre de connexion DA.Also, it is common that the constraints imposed on the retightening ring 10 during the passage of the abutment lips 8, over the diameter D1 in particular, make it pass to the plastic state given the strong deformation imposed. The tightening ring 10 is then no longer able to properly fulfill its function of retightening and maintaining the connection diameter DA.

Dans l'invention, on cherche à fournir un contact électrique femelle apte à être utilisé même dans des conditions de fortes vibrations et températures, ne présentant pas tout ou partie des inconvénients des contacts électriques femelles de l'état de la technique.In the invention, it is sought to provide a female electrical contact capable of being used even under conditions of high vibrations and temperatures, not having all or part of the disadvantages of female electrical contacts of the state of the art.

Pour cela, l'invention propose d'usiner au niveau de l'extrémité de connexion d'intérêt une gorge en contre dépouille, l'angle de la contre dépouille correspondant sensiblement à l'angle de resserrage pour obtenir le diamètre réduit souhaité au niveau de ladite extrémité de connexion. Par contre dépouille, on entend que la gorge est ménagée de manière à ce que son fond soit incliné longitudinalement. Ainsi, le fond de la gorge en contre dépouille présente, avant le resserrage de la première extrémité de connexion, une pente par rapport à l'axe longitudinal du contact électrique femelle telle, que le diamètre de l'extrémité avant de la gorge en contre dépouille est supérieur au diamètre de l'extrémité arrière de ladite gorge en contre dépouille. D'une manière générale, avant et arrière, ou amont et aval, s'entendent par rapport au sens de la connexion au niveau de l'extrémité de connexion considérée. Le diamètre de la gorge est considéré au niveau du fond de ladite gorge. Une fois le resserrage réalisé, la gorge présente une section droite, parallèle à l'axe longitudinal du contact. Un élément de resserrage annulaire, tel qu'une bague, à section droite également, peut alors être utilisé de manière optimum, puisque toute sa surface repose de manière égale sur le fond la gorge. Le diamètre de l'extrémité de connexion au niveau des lèvres de butée est réduit par rapport au système de l'état de la technique décrit ci-dessus, rendant moindre l'écartement à faire subir à l'élément de resserrage pour passer cette butée.For this, the invention proposes machining at the connection end of interest a groove against undercut, the angle of the undercut corresponding substantially to the tightening angle to obtain the desired reduced diameter at the level of said connection end. On the contrary draft, it is meant that the groove is arranged so that its bottom is inclined longitudinally. Thus, the bottom of the undercut groove has, before the tightening of the first connection end, a slope relative to the longitudinal axis of the female electrical contact such that the diameter of the front end of the throat against clearance is greater than the diameter of the rear end of said groove against undercut. In general, front and rear, or upstream and downstream, are understood in relation to the direction of the connection at the connection end considered. The diameter of the groove is considered at the bottom of said groove. Once the tightening is completed, the groove has a cross section, parallel to the longitudinal axis of the contact. An annular tightening element, such as a ring, also having a cross section, can then be used optimally, since its entire surface rests evenly on the bottom of the groove. The diameter of the connection end at the abutment lips is reduced compared to the system of the state of the art described above, making less the spacing to be subjected to the tightening element to pass this stop .

L'invention a donc pour objet un contact électrique femelle de forme générale circulaire cylindrique comportant deux extrémités de connexion, au moins une première extrémité de connexion présentant au moins deux fentes longitudinales, ladite première extrémité de connexion étant apte à présenter deux états, respectivement état non contraint, dans lequel ladite première extrémité de connexion présente une section longitudinale droite, et état contraint, dans lequel ladite première extrémité de connexion présente une section longitudinale tronconique, une gorge annulaire étant creusée depuis une surface externe de la paroi du contact électrique femelle, au niveau de la première extrémité de connexion, destinée à recevoir un élément de resserrage,
caractérisé en ce que la gorge annulaire présente, lorsque la première extrémité de connexion est dans l'état non contraint, une section longitudinale tronconique, de sorte que le diamètre d'une extrémité avant de la gorge annulaire est supérieur au diamètre d'une extrémité arrière de ladite gorge annulaire, et en ce que la gorge annulaire présente, lorsque la première extrémité de connexion est dans l'état contraint, une section droite.The subject of the invention is therefore a female electrical contact of generally cylindrical circular shape comprising two connection ends, at least one first connection end having at least two longitudinal slots, said first connection end being able to present two states, respectively state unstressed, wherein said first connection end has a straight longitudinal section, and stressed state, wherein said first connection end has a frustoconical longitudinal section, an annular groove being hollowed from an outer surface of the wall of the female electrical contact, at the level of first connection end, intended to receive a tightening element,
characterized in that the annular groove, when the first connection end is in the unconstrained state, has a frustoconical longitudinal section, so that the diameter of a front end of the annular groove is greater than the diameter of an end. rear of said annular groove, and in that the annular groove has, when the first connection end is in the constrained state, a cross section.

L'état non contraint est l'état dans lequel le contact se trouve avant d'être resserré pour avoir un diamètre de connexion réduit au niveau d'une de ses deux extrémités de connexion.The unconstrained state is the state in which the contact is before being tightened to have a reduced connection diameter at one of its two connection ends.

Lorsque l'une des deux extrémités de connexion est déformée/resserrée, pour réduire son diamètre d'ouverture, le reste du corps du contact et la seconde extrémité de connexion ne sont pas déformés et continue d'avoir une forme circulaire cylindrique. La déformation/contrainte n'est que locale.When one of the two connection ends is deformed / tightened, to reduce its opening diameter, the rest of the contact body and the second connection end are not deformed and continues to have a circular cylindrical shape. The deformation / constraint is only local.

Par diamètre de connexion, on entend le diamètre interne du contact au niveau de l'extrémité de connexion considérée.By connection diameter is meant the internal diameter of the contact at the connection end considered.

Par diamètre réduit, on entend que le diamètre considéré est inférieur au diamètre du reste du contact circulaire cylindrique.By reduced diameter, it is meant that the diameter in question is smaller than the diameter of the remainder of the cylindrical circular contact.

La gorge s'étend sur une certaine longueur de l'extrémité de connexion, suffisante pour recevoir un élément de resserrage également annulaire, apte à maintenir une pression de resserrage autour de ladite extrémité de connexion et permettre un maintien du diamètre de connexion réduit dans toutes les circonstances.The groove extends over a certain length of the connection end, sufficient to receive a ring-like tightening element, able to maintain a tightening pressure around said connection end and to allow a maintenance of the reduced connection diameter in all circumstances.

Par longueur, on entend la dimension s'étendant parallèlement à l'axe longitudinal de l'élément considéré.Length means the dimension extending parallel to the longitudinal axis of the element in question.

L'état contraint est obtenu mécaniquement, en resserrant le diamètre d'ouverture au niveau de l'extrémité de connexion. Le resserrage de l'extrémité de connexion tend à ramener le fond de la gorge parallèlement à l'axe longitudinal du contact. L'inclinaison de la gorge diminue pour être quasiment nulle, étant entendu que du fait des contraintes de fabrication, une légère inclinaison par rapport à l'axe longitudinal, dans un sens ou dans l'autre, peut être acceptable.The constrained state is obtained mechanically, by tightening the opening diameter at the connection end. Tightening the connection end tends to bring the bottom of the groove parallel to the longitudinal axis of the contact. The inclination of the groove decreases to be almost zero, given that due to manufacturing constraints, a slight inclination relative to the longitudinal axis, in one direction or the other, may be acceptable.

Par section longitudinale, on entend une section dans un plan longitudinal du contact électrique femelle.Longitudinal section means a section in a longitudinal plane of the female electrical contact.

Avantageusement, la gorge annulaire présente, dans l'état non contraint de la première extrémité de connexion, une pente ayant un angle par rapport à un axe longitudinal du contact électrique femelle sensiblement égal à un angle de resserrage devant être appliqué à la première extrémité de connexion pour passer à l'état contraint et obtenir un diamètre de connexion réduit.Advantageously, the annular groove has, in the unconstrained state of the first connection end, a slope having an angle with respect to a longitudinal axis of the female electrical contact substantially equal to a tightening angle to be applied to the first end of the connection to go to the constrained state and get a reduced connection diameter.

Selon l'invention, le contact électrique femelle peut comporter un élément de resserrage disposé dans la gorge annulaire, et apte à maintenir la première extrémité de connexion dans l'état contraint, ledit élément de resserrage présentant une section longitudinale droite.According to the invention, the female electrical contact may comprise a retightening element disposed in the annular groove, and adapted to maintain the first connection end in the constrained state, said retightening element having a right longitudinal section.

L'élément de resserrage annulaire est destiné à être monté sur l'extrémité de connexion une fois qu'elle est à l'état contraint/resserré. Ainsi, lors du montage, du fait de la forme initiale en contre dépouille de la gorge, il n'y a pas de contraintes excessives exercées sur ledit anneau.The annular retightening element is intended to be mounted on the connection end once it is in the constrained / constricted state. Thus, during assembly, because of the initial shape against the draft of the groove, there is no excessive stress exerted on said ring.

L'élément de resserrage doit être apte à maintenir l'extrémité de connexion dans l'état contraint même lorsque des efforts importants sont appliqués, tendant à faire revenir ladite extrémité de connexion dans un état non contraint.The tightening element must be able to maintain the connection end in the constrained state even when large forces are applied, tending to return said connection end in an unconstrained state.

Préférentiellement, l'élément de resserrage a des propriétés mécaniques telles que l'élasticité, qui le rendent particulièrement adapté au fonctionnement à des températures supérieures à 200 °C.Preferably, the retightening element has mechanical properties such as elasticity, which make it particularly suitable for operation at temperatures above 200 ° C.

Dans un exemple de réalisation, l'extrémité avant de la gorge annulaire est bordée par des lèvres de butée. Ces lèvres de butée peuvent par exemple être obtenues en usinant la gorge en aval de l'ouverture de l'extrémité de connexion, de manière à ce que ladite gorge ne soit pas débouchante au niveau de ladite ouverture. Ainsi, la paroi non creusée du contact, en amont de la gorge forme les lèvres de butée. Autrement, ces lèvres de butée peuvent être rapportées sur l'extrémité de connexion et fixées notamment par soudage.In an exemplary embodiment, the front end of the annular groove is bordered by stop lips. These abutment lips may for example be obtained by machining the groove downstream of the opening of the connection end, so that said groove is not open at said opening. Thus, the underneath wall of the contact upstream of the groove forms the abutment lips. Otherwise, these stop lips can be attached to the connection end and fixed in particular by welding.

La gorge est ainsi bordée par deux parois verticales et le diamètre externe du contact au niveau desdites lèvres de butée, ainsi qu'en aval de la gorge, est supérieur au diamètre externe du contact au niveau du fond de la gorge. De même, le diamètre externe au niveau desdites lèvres de butée, ainsi qu'en aval de la gorge, est supérieur au diamètre interne de l'élément de resserrage, ce qui garantit une fois qu'il est mis en place que l'élément de resserrage reste bien en position dans la gorge.The groove is thus bordered by two vertical walls and the outer diameter of the contact at said abutment lips, as well as downstream of the groove, is greater than the external diameter of the contact at the bottom of the groove. Likewise, the external diameter at the level of said abutment lips, and downstream of the groove, is greater than the internal diameter of the retightening element, which ensures once it is in place that the retightening element remains in position in the groove.

L'élément de resserrage peut par exemple être un anneau circulaire cylindrique fendu.The tightening element may for example be a split cylindrical circular ring.

La fente permet ainsi de faciliter le passage des lèvres de butée sans exercer des contraintes trop importantes sur l'anneau.The slot thus facilitates the passage of the stop lips without exerting too much stress on the ring.

L'élément de resserrage peut autrement être un ressort hélicoïdale circulaire cylindrique, le coût de fabrication d'un tel ressort étant souvent moindre.The tightening element may otherwise be a cylindrical circular helical spring, the manufacturing cost of such a spring is often less.

L'invention concerne également un ensemble connecteur comportant un insert muni d'au moins une cavité traversante, destinée à recevoir deux contacts électriques complémentaires, ledit ensemble connecteur comportant au moins un contact électrique femelle, ou douille, selon l'invention, et au moins un contact électrique mâle, ou broche, complémentaire, aptes à être insérés dans au moins une cavité traversante de l'insert.The invention also relates to a connector assembly comprising an insert provided with at least one through cavity, intended to receive two complementary electrical contacts, said connector assembly comprising at least one female electrical contact, or socket, according to the invention, and at least one a male electrical contact, or pin, complementary, adapted to be inserted in at least one through cavity of the insert.

Les contacts mâle et femelle sont introduits chacun dans une cavité de l'insert considérée, par une extrémité opposée, de sorte qu'une zone de connexion entre les deux contacts électriques complémentaires est située à l'intérieur de ladite cavité.The male and female contacts are each introduced into a cavity of the insert considered, by an opposite end, so that a connection area between the two complementary electrical contacts is located inside said cavity.

L'invention concerne aussi un procédé de réalisation d'un élément de contact femelle selon l'invention, comportant les étapes suivantes :

  • on réalise un contact électrique femelle, de forme générale cylindrique circulaire, muni à chacune de ses extrémités d'une extrémité de connexion, pour être connecté à un contact électrique complémentaire ou un câble ;
  • on usine au moins une fente longitudinale au niveau d'une première extrémité de connexion ;
  • on usine une gorge annulaire depuis la surface externe de la paroi du contact électrique femelle, au niveau de la première extrémité de connexion, de manière à ce qu'un fond de la gorge s'étende selon un axe incliné par rapport à un axe longitudinal du contact électrique femelle, de telle sorte que le diamètre d'une extrémité avant de la gorge annulaire est supérieur au diamètre d'une extrémité arrière de ladite gorge annulaire ;
  • on resserre la première extrémité de connexion, de manière à réduire le diamètre de connexion au niveau de ladite première extrémité de connexion, jusqu'à ce que le fond de la gorge s'étende selon un axe parallèle à l'axe longitudinal du contact électrique femelle ;
  • on fait coulisser un élément de resserrage le long de la paroi externe du contact femelle, jusqu'à ce qu'il soit entièrement logé dans la gorge annulaire.
The invention also relates to a method for producing a female contact element according to the invention, comprising the following steps:
  • making a female electrical contact, of circular cylindrical general shape, provided at each of its ends with a connection end, to be connected to a complementary electrical contact or a cable;
  • at least one longitudinal slot is machined at a first connection end;
  • an annular groove is machined from the outer surface of the wall of the female electrical contact, at the first connection end, so that a bottom of the groove extends along an axis inclined with respect to a longitudinal axis female electrical contact, such that the diameter of a front end of the annular groove is greater than the diameter of a rear end of said annular groove;
  • the first connection end is tightened, so as to reduce the connection diameter at said first connection end, until the bottom of the groove extends along an axis parallel to the longitudinal axis of the electrical contact female;
  • a tightening element is slid along the outer wall of the female contact, until it is fully housed in the annular groove.

Selon un exemple de mise en oeuvre du procédé de l'invention, il est possible de prévoir l'étape supplémentaire suivante :

  • on ménage simultanément à la gorge annulaire des lèvres de butée, en amont de ladite gorge annulaire, telle que le diamètre externe du contact électrique femelle au niveau desdites lèvres de butée est supérieur au diamètre externe du contact électrique femelle au niveau du fond de la gorge et supérieur au diamètre interne de l'élément de resserrage.
According to an exemplary implementation of the method of the invention, it is possible to provide the following additional step:
  • simultaneously cleaning the annular groove of the stop lips, upstream of said annular groove, such that the outer diameter of the female electrical contact at said abutment lips is greater than the external diameter of the female electrical contact at the bottom of the throat; and greater than the internal diameter of the retightening element.

L'invention sera mieux comprise à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent. Celles-ci sont présentées à titre indicatif et nullement limitatif de l'invention. Les figures représentent :

  • Figure 1 : une représentation en coupe longitudinale d'une extrémité de connexion d'un contact électrique femelle de l'état de la technique déjà décrit ;
  • Figure 2: une représentation générale d'un contact électrique femelle selon l'invention ;
  • Figures 3A à 3B : des représentations en coupe longitudinale d'une extrémité de connexion d'un contact électrique femelle selon l'invention ;
  • Figure 4 : une représentation en coupe longitudinale d'un contact électrique femelle selon l'invention, connecté à un contact électrique mâle complémentaire.
The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These are presented as an indication and in no way limitative of the invention. The figures represent:
  • Figure 1 : a longitudinal sectional representation of a connection end of a female electrical contact of the state of the art already described;
  • Figure 2 : a general representation of a female electrical contact according to the invention;
  • Figures 3A to 3B : longitudinal sectional representations of a connection end of a female electrical contact according to the invention;
  • Figure 4 : a longitudinal sectional representation of a female electrical contact according to the invention, connected to a complementary male electrical contact.

Dans un but de simplification et de clarification des figures, sur les différentes figures les mêmes références désignent les mêmes éléments.In order to simplify and clarify the figures, in the various figures, the same references designate the same elements.

Sur la figure 2 est représenté un exemple de réalisation d'un contact électrique femelle 100 selon l'invention.On the figure 2 is shown an embodiment of a female electrical contact 100 according to the invention.

Le contact électrique femelle 100, ou douille, comporte un corps de douille 101, de forme générale cylindrique à section circulaire, ou circulaire cylindrique, creux. Les deux extrémités 102, 103 du cylindre sont ouvertes et ménagent des extrémités de connexion, destinées chacune à recevoir un contact électrique mâle complémentaire, ou broche, ou un câble. L'extrémité de connexion 102 destinée à recevoir une broche (à droite sur la figure 2) est fendue longitudinalement. Les deux fentes 104 permettent de faciliter le resserrage de ladite extrémité 102, sans chevauchement de matière.The female electrical contact 100, or socket, comprises a sleeve body 101, generally cylindrical in shape with circular section, or circular cylindrical, hollow. The two ends 102, 103 of the cylinder are open and provide connecting ends, each intended to receive a complementary male electrical contact, or pin, or cable. The connection end 102 for receiving a pin (on the right on the figure 2 ) is split longitudinally. The two slots 104 make it easier to tighten said end 102 without overlapping material.

Une paroi 105 du corps de douille 101 est creusée depuis une surface externe 106, de manière à ménager une gorge annulaire 107 en contre dépouille. Un élément de resserrage annulaire 108 fendu entoure un périmètre externe du corps de douille 101. L'anneau de resserrage 108 est plus précisément logé dans la gorge annulaire 107, dans laquelle il est maintenu en position, notamment grâce à des lèvres de butée 109.A wall 105 of the socket body 101 is hollowed from an outer surface 106, so as to provide an annular groove 107 against undercut. A slotted annular sealing member 108 surrounds an outer perimeter of the socket body 101. The tightening ring 108 is more precisely housed in the annular groove 107, in which it is held in position, in particular by virtue of the stop lips 109.

Les figures 3A, 3B et 3C montrent de manière plus précise la forme en contre dépouille de la gorge annulaire 107 (figure 3A) dans l'état non contraint (figure 3A) et la forme de section droite de ladite gorge annulaire 107 à l'état contraint (figures 3B et 3C).The FIGS. 3A, 3B and 3C show more precisely the undercut shape of the annular groove 107 ( figure 3A ) in the unconstrained state ( figure 3A ) and the cross-sectional shape of said annular groove 107 in the stressed state ( Figures 3B and 3C ).

Dans un premier temps, on creuse ou on usine sur le corps de douille 101 la gorge annulaire 107, en biais depuis la surface externe 106 de la paroi 105, qui elle s'étend sensiblement parallèlement à un axe longitudinal A' du corps de douille 101. Ainsi, une profondeur amont p de la gorge annulaire 107 est inférieure à une profondeur aval p' de ladite gorge 107. Par profondeur, on entend la dimension s'étendant radialement par rapport à l'axe A'. Autrement dit, le diamètre externe au niveau amont de la gorge annulaire 107 est supérieur au diamètre externe au niveau aval de la gorge annulaire 107. Le fond 110 de la gorge 107, plat, s'étend selon un axe I incliné d'un angle X1 par rapport à l'axe longitudinal A'. Un diamètre interne D' de l'ouverture 111 de l'extrémité de connexion 102 correspond au diamètre interne général du corps de douille 101.In a first step, the annular groove 107 is hollowed out or machined on the socket body 101 at an angle from the external surface 106 of the wall 105, which extends substantially parallel to a longitudinal axis A 'of the socket body 101. Thus, an upstream depth p of the annular groove 107 is less than a downstream depth p 'of said groove 107. By depth is meant the dimension extending radially with respect to the axis A'. In other words, the outer diameter at the upstream level of the annular groove 107 is greater than the outside diameter at the downstream level of the annular groove 107. The bottom 110 of the groove 107, flat, extends along an axis I inclined at an angle X1 with respect to the longitudinal axis A '. An inner diameter D 'of the opening 111 of the connecting end 102 corresponds to the general internal diameter of the socket body 101.

L'angle X1 est avantageusement prédéterminé en fonction de l'angle de resserrage X2 qui sera ensuite appliqué à l'extrémité de connexion 102, de manière à ce qu'une fois le resserrage effectué, le fond 110 de la gorge 107 s'étende sensiblement parallèlement à l'axe A' du contact 100. L'angle de resserrage X2 doit correspondre à l'angle à appliquer pour obtenir un diamètre de connexion réduit D" (figure 3B) apte à permettre la connexion électrique avec un contact mâle complémentaire. Le diamètre de connexion réduit D" correspond au diamètre interne de l'extrémité de connexion au niveau de l'ouverture 111. D'une manière générale, selon l'invention, l'angle X1 est sensiblement égal à l'angle de resserrage X2.The angle X1 is advantageously predetermined as a function of the tightening angle X2 which will then be applied to the connection end 102, so that once the tightening is done, the bottom 110 of the groove 107 extends substantially parallel to the axis A 'of the contact 100. The tightening angle X2 must correspond to the angle to be applied to obtain a reduced connection diameter D "( figure 3B ) adapted to allow the electrical connection with a complementary male contact. The reduced connection diameter D "corresponds to the internal diameter of the connection end at the level of the opening 111. In general, according to the invention, the angle X1 is substantially equal to the tightening angle X2.

On réalise la gorge 107 à distance de l'ouverture 111 de l'extrémité de connexion 102, de manière à ménager des lèvres de butée 109 en amont de la gorge 107.The groove 107 is made at a distance from the opening 111 of the connection end 102, so as to provide stop lips 109 upstream of the groove 107.

On vient ensuite resserrer l'extrémité de connexion 102, de manière à réduire le diamètre de l'ouverture 111, jusqu'à l'obtention du diamètre réduit D" correspondant au diamètre souhaité, en fonction des dimensions de la broche qui doit être insérée. La paroi 105 du corps de douille 101 est ainsi localement inclinée de l'angle X2, tandis que le fond 110 de la gorge 107, lui, se retrouve parallèle à l'axe A'. Aussi, le diamètre externe au niveau de la gorge annulaire 107 est constant sur toute sa longueur. Par longueur, on entend la dimension s'étendant sensiblement parallèlement à l'axe longitudinal A'.The connection end 102 is then tightened so as to reduce the diameter of the opening 111 until the reduced diameter D "corresponding to the desired diameter is obtained, depending on the dimensions of the pin to be inserted. The wall 105 of the socket body 101 is thus locally inclined by the angle X2, whereas the bottom 110 of the groove 107 is parallel to the axis A. As a result, the external diameter at the Annular groove 107 is constant over its entire length.Length means the dimension extending substantially parallel to the longitudinal axis A '.

La section longitudinale de l'extrémité de connexion 102 est alors tronconique. Le diamètre interne comme le diamètre externe de l'extrémité de connexion sont croissants, depuis l'ouverture 111 présentant le diamètre interne réduit D", jusqu'à une cloison de séparation 112 (figure 4) séparant les deux extrémités de connexion 102, 103. Le reste du corps de douille 101, comme cela est visible sur la figure 2, n'est pas déformé par cette étape de resserrage de l'extrémité de connexion 102, dont le diamètre interne reste égal au diamètre D' initial.The longitudinal section of the connection end 102 is frustoconical. The inner diameter and the outer diameter of the connecting end are increasing, from the opening 111 having the reduced inside diameter D ", to a partition wall 112 ( figure 4 ) separating the two connection ends 102, 103. The remainder of the socket body 101, as visible on the figure 2 is not deformed by this step of tightening the connection end 102, whose internal diameter remains equal to the initial diameter D '.

Une fois le diamètre réduit D" obtenu, on amène l'anneau de resserrage 108 en regard de l'ouverture 111 de l'extrémité de connexion 102. On force le passage dudit anneau de resserrage 108 au niveau de l'ouverture 111, afin de lui faire chevaucher les lèvres de butée 109. En effet, l'extrémité de connexion 102 présente au niveau des lèvres de butée 109 un diamètre externe D1' supérieur au diamètre interne D2' de l'anneau de resserrage 108. Cependant, conformément à l'invention, la gorge 107 ayant à ce moment là une section droite, le diamètre externe D1' au niveau des lèvres de butée de la douille 100 est strictement inférieur au diamètre externe D1 au niveau des lèvres de butée d'une douille 1 (figure 1) de l'état de la technique de dimensions équivalentes.Once the reduced diameter D "obtained, it brings the tightening ring 108 opposite the opening 111 of the connection end 102. It forces the passage of said tightening ring 108 at the opening 111, so to make it overlap the stop lips 109. Indeed, the connection end 102 has at the stop lips 109 an outer diameter D1 'greater than the internal diameter D2' of the tightening ring 108. However, in accordance with FIG. the invention, the groove 107 having at this time a cross-section, the external diameter D1 'at the abutment lips of the bushing 100 is strictly smaller than the outside diameter D1 at the abutment lips of a bushing 1 ( figure 1 ) of the state of the art of equivalent dimensions.

Ainsi, d'une manière générale, la différence de diamètre entre D1' et D2' est comprise entre 0.2mm et 0.8mm, alors que pour une douille 1 de l'état de la technique, la différence de diamètre entre D1 et D2 (figure 1) est plutôt comprise entre 1 mm et 1.2mm. Cette différence dans les écarts de diamètres permet d'éviter que l'anneau de resserrage 108 soit soumis à des contraintes telles qu'il passe à un état plastique pénalisant. II est donc possible d'utiliser pour l'anneau de resserrage 108, ou d'une manière générale pour l'élément de resserrage, des matériaux moins élastique tels que des laitons simples assurant une meilleure tenue du resserrage de l'extrémité de connexion 102 et ainsi de la connexion entre la douille et la broche associée.Thus, in general, the difference in diameter between D1 'and D2' is between 0.2mm and 0.8mm, whereas for a sleeve 1 of the state of the art, the difference in diameter between D1 and D2 ( figure 1 ) is rather between 1 mm and 1.2mm. This difference in the differences in diameters makes it possible to prevent the tightening ring 108 from being subjected to constraints such that it changes to a penalizing plastic state. It is therefore possible to use for the tightening ring 108, or generally for the tightening element, less elastic materials such as simple brasses ensuring a better holding of the tightening of the connecting end 102 and so the connection between the socket and the associated pin.

On fait ensuite coulisser l'anneau de resserrage 108 le long de la surface externe 106 de la paroi 105 du corps de douille 101, jusqu'à ce qu'il soit entièrement contenu dans la gorge 107 (figure 3C).The tightening ring 108 is then slid along the outer surface 106 of the wall 105 of the socket body 101 until it is completely contained in the groove 107 ( figure 3C ).

Les profondeurs amont p et aval p' de la gorge 107 sont suffisantes pour empêcher le retrait involontaire de l'anneau de resserrage 108. L'anneau de resserrage 108 étant de section droite, il s'étend sur toute sa longueur parallèlement au fond 110 de la gorge 107, de sorte que les contraintes exercées par ledit anneau de resserrage 108 sur l'extrémité de connexion 102 sont sensiblement constantes.The upstream and downstream depths p 'of the groove 107 are sufficient to prevent the involuntary withdrawal of the retightening ring 108. The retightening ring 108 being of cross section, it extends along its entire length parallel to the bottom 110. of the groove 107, so that the stresses exerted by said tightening ring 108 on the connecting end 102 are substantially constant.

La figure 4 montre un contact électrique femelle 100 selon l'invention, connecté au niveau d'une extrémité de connexion 102 à diamètre de connexion réduit à un contact électrique mâle 200 complémentaire.The figure 4 shows a female electrical contact 100 according to the invention, connected at a connection end 102 with a reduced connection diameter to a complementary male electrical contact 200.

Le plus grand diamètre externe D3 du contact mâle 200, au niveau de l'extrémité de connexion 201 insérée dans l'extrémité de connexion 102 réduite, est de 5,41 mm. Le diamètre externe D1' au niveau des lèvres de butée 109 est de 6,8mm, tandis que le diamètre interne D2' de l'élément de resserrage 108 (ici un ressort hélicoïdale circulaire cylindrique) est de 6.5 mm. Le diamètre de connexion réduit D", correspondant au plus petit diamètre de l'extrémité de connexion 102, situé au niveau de l'ouverture 111 de ladite extrémité de connexion 102, est de 5.4 mm.The largest outside diameter D3 of the male contact 200, at the connection end 201 inserted into the reduced connection end 102, is 5.41 mm. The outer diameter D1 'at the stop lips 109 is 6.8mm, while the internal diameter D2' of the retightening element 108 (here a cylindrical circular helical spring) is 6.5 mm. The reduced connection diameter D ", corresponding to the smallest diameter of the connection end 102, located at the opening 111 of said connection end 102, is 5.4 mm.

Ainsi le contact mâle 200 est introduit en force dans l'extrémité de connexion 102 du contact femelle 100, et l'élément de resserrage 108 assure que le diamètre de connexion réduit D" soit maintenu.Thus the male contact 200 is forced into the connection end 102 of the female contact 100, and the retightening element 108 ensures that the reduced connection diameter D "is maintained.

Claims (9)

Contact électrique femelle (100) de forme générale circulaire cylindrique comportant deux extrémités de connexion (102, 103), au moins une première extrémité de connexion présentant au moins deux fentes longitudinales, ladite première extrémité de connexion étant apte à présenter deux états, respectivement état non contraint, dans lequel ladite première extrémité de connexion présente une section longitudinale droite, et état contraint, dans lequel ladite première extrémité de connexion présente une section longitudinale tronconique, une gorge annulaire (107) étant creusée depuis une surface externe (106) de la paroi (105) du contact électrique femelle, au niveau de la première extrémité de connexion, destinée à recevoir un élément de resserrage (108),
caractérisé en ce que la gorge annulaire présente, lorsque la première extrémité de connexion est dans l'état non contraint, une section longitudinale tronconique, de sorte que le diamètre d'une extrémité avant de la gorge annulaire est supérieur au diamètre d'une extrémité arrière de ladite gorge annulaire, et en ce que la gorge annulaire présente, lorsque la première extrémité de connexion est dans l'état contraint, une section droite.Female electrical contact (100) of generally cylindrical circular shape having two connection ends (102, 103), at least a first connection end having at least two longitudinal slots, said first connection end being able to present two states, respectively state non-constrained, wherein said first connection end has a straight longitudinal section, and constrained state, wherein said first connection end has a frustoconical longitudinal section, an annular groove (107) being hollowed from an outer surface (106) of the wall (105) of the female electrical contact, at the first connection end, for receiving a retightening element (108),
characterized in that the annular groove, when the first connection end is in the unconstrained state, has a frustoconical longitudinal section, so that the diameter of a front end of the annular groove is greater than the diameter of an end. rear of said annular groove, and in that the annular groove has, when the first connection end is in the constrained state, a cross section. Contact électrique femelle selon la revendication 1, caractérisé en ce que la gorge annulaire présente, dans l'état non contraint de la première extrémité de connexion, une pente ayant un angle (X1) par rapport à un axe longitudinal (A') du contact électrique femelle sensiblement égal à un angle de resserrage (X2) devant être appliqué à la première extrémité de connexion pour passer à l'état contraint et obtenir un diamètre de connexion réduit (D").Female electrical contact according to claim 1, characterized in that the annular groove has, in the unconstrained state of the first connection end, a slope having an angle (X1) with respect to a longitudinal axis (A ') of the contact electrical female substantially equal to a tightening angle (X2) to be applied to the first connection end to enter the constrained state and obtain a reduced connection diameter (D "). Contact électrique femelle selon l'une des revendications 1 à 2, caractérisé en ce qu'il comporte un élément de resserrage (108) disposé dans la gorge annulaire, et apte à maintenir la première extrémité de connexion dans l'état contraint, ledit élément de resserrage présentant une section droite.Female electrical contact according to one of claims 1 to 2, characterized in that it comprises a retightening element (108) arranged in the annular groove and capable of holding the first connection end in the stressed state, said element retightening having a cross section. Contact électrique femelle selon la revendication 3, caractérisé en ce que l'élément de resserrage comporte un anneau circulaire cylindrique fendu.Female electrical contact according to claim 3, characterized in that the retightening element comprises a split cylindrical circular ring. Contact électrique femelle selon la revendication 3, caractérisé en ce que l'élément de resserrage comporte un ressort hélicoïdale circulaire cylindrique.Female electrical contact according to claim 3, characterized in that the retightening element comprises a cylindrical circular helical spring. Contact électrique femelle selon l'une des revendications 1 à 5, caractérisé en ce que l'extrémité avant de la gorge annulaire est bordée par des lèvres de butée (109).Female electrical contact according to one of claims 1 to 5, characterized in that the front end of the annular groove is bordered by stop lips (109). Ensemble connecteur comportant un insert muni d'au moins une cavité traversante, destinée à recevoir deux contacts électriques complémentaires, ledit ensemble connecteur comportant au moins un contact électrique femelle (100), selon l'une des revendications 1 à 6, et au moins un contact électrique mâle (200) complémentaire, aptes à être insérés dans au moins une cavité traversante de l'insert.Connector assembly comprising an insert provided with at least one through cavity for receiving two complementary electrical contacts, said connector assembly comprising at least one female electrical contact (100) according to one of claims 1 to 6, and at least one male electrical contact (200) complementary, adapted to be inserted into at least one through cavity of the insert. Procédé de réalisation d'un élément de contact femelle selon l'une des revendications 1 à 9, comportant les étapes suivantes : - on réalise un contact électrique femelle (100), de forme générale cylindrique circulaire, muni à chacune de ses extrémités d'une extrémité de connexion (102, 103), pour être connecté à un contact électrique complémentaire ou un câble ; - on usine au moins une fente longitudinale au niveau d'une première extrémité de connexion ; - on usine une gorge annulaire (107) depuis la surface externe (106) de la paroi (105) du contact électrique femelle, au niveau de la première extrémité de connexion (102), de manière à ce qu'un fond (110) de la gorge s'étende selon un axe (1) incliné par rapport à l'axe longitudinal (A') du contact électrique femelle, de telle sorte que le diamètre d'une extrémité avant de la gorge annulaire est supérieur au diamètre d'une extrémité arrière de ladite gorge annulaire ; - on resserre la première extrémité de connexion, de manière à réduire le diamètre de connexion au niveau de ladite première extrémité de connexion, jusqu'à ce que le fond de la gorge s'étende selon un axe parallèle à l'axe longitudinal du contact électrique femelle ; - on fait coulisser un élément de resserrage (108) le long de la paroi externe du contact femelle, jusqu'à ce qu'il soit entièrement logé dans la gorge annulaire. Process for producing a female contact element according to one of Claims 1 to 9, comprising the following steps: - A female electrical contact (100) is made, generally cylindrical circular shape, provided at each of its ends with a connection end (102, 103), to be connected to a complementary electrical contact or a cable; at least one longitudinal slot is machined at a first connection end; an annular groove (107) is machined from the outer surface (106) of the wall (105) of the female electrical contact, at the first connection end (102), so that a bottom (110) of the groove extends along an axis (1) inclined relative to the longitudinal axis (A ') of the female electrical contact, such that the diameter of a front end of the annular groove is greater than the diameter of a rear end of said annular groove; the first connecting end is tightened so as to reduce the connection diameter at the level of said first connection end until the bottom of the groove extends along an axis parallel to the longitudinal axis of the contact; female electric; - A tightening element (108) is slid along the outer wall of the female contact until it is fully housed in the annular groove. Procédé de réalisation d'un élément de contact femelle selon la revendication 8, comportant l'étape supplémentaire suivante : - on ménage simultanément à la gorge des lèvres de butée (109), en amont de la gorge annulaire, telle que le diamètre (D1') du contact électrique femelle au niveau desdites lèvres de butée est supérieur au diamètre (D2') de l'élément de resserrage. A method of making a female contact element according to claim 8, comprising the further step of: the grooves of the abutment lips (109) are simultaneously cleaned upstream of the annular groove, such that the diameter (D1 ') of the female electrical contact at the level of the abutment lips is greater than the diameter (D2') of the tightening element.
EP11177337A 2010-08-27 2011-08-11 Female electric contact, connector assembly and manufacturing method Active EP2424047B1 (en)

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FR1056810A FR2964260B1 (en) 2010-08-27 2010-08-27 FEMALE ELECTRICAL CONTACT, CONNECTOR ASSEMBLY AND METHOD OF MAKING

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US8317552B2 (en) 2012-11-27
US20120052750A1 (en) 2012-03-01
FR2964260A1 (en) 2012-03-02
FR2964260B1 (en) 2012-09-14

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