EP3878061A1 - Rear connection with electromagnetic protection - Google Patents

Rear connection with electromagnetic protection

Info

Publication number
EP3878061A1
EP3878061A1 EP19845587.5A EP19845587A EP3878061A1 EP 3878061 A1 EP3878061 A1 EP 3878061A1 EP 19845587 A EP19845587 A EP 19845587A EP 3878061 A1 EP3878061 A1 EP 3878061A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
connector
fixing ring
harness
external
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
EP19845587.5A
Other languages
German (de)
French (fr)
Other versions
EP3878061B1 (en
Inventor
David Thomasse
Jérôme GENOULAZ
Jean-Luc COTTIN
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.)
Safran Electrical and Power SAS
Original Assignee
Safran Electrical and Power SAS
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 Safran Electrical and Power SAS filed Critical Safran Electrical and Power SAS
Publication of EP3878061A1 publication Critical patent/EP3878061A1/en
Application granted granted Critical
Publication of EP3878061B1 publication Critical patent/EP3878061B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/6592—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable

Definitions

  • the invention relates generally to a rear connector. More particularly, the invention relates to a rear connector capable of connecting an armored harness comprising shielded cables to a connector in a reliable manner and so as to minimize the electromagnetic disturbances. The invention also relates to a completed shielding harness and a connection comprising this rear connector.
  • electrical connections are mainly made using electrical harnesses.
  • electrical harnesses In aircraft, electrical connections are mainly made using electrical harnesses.
  • constraints apply directly or indirectly to electrical harnesses, especially in the engine areas. These constraints can be mechanical, electrical or environmental.
  • EMC electromagnetic compatibility
  • the electrical connections generally have a shield which makes it possible to attenuate the disturbances received or emitted.
  • the shields can be on an individual cable (shield) and / or on the whole of the strand / harness (over-shielding).
  • the electromagnetic shielding must cover all the areas of the harness between the boxes containing the equipment. Use of these rear fittings (or “backshells” in English), assembled with the electrical connectors, must be able to meet the electrical and mechanical requirements.
  • Application US-A-5052947 discloses a rear connector (shield termination) for an over-shielded harness having shielded cables.
  • the rear connector includes a sleeve and a fixing ring.
  • the harness armor is connected to a pad at the rear of the sleeve and is secured on the latter by a clamp.
  • the cables pass inside the sleeve.
  • the ends of the cables have their conductive parts exposed.
  • the cable shield terminations pass through the through holes to the outside, and then join a range at the front of the sleeve on which they are secured by means of a cable tie.
  • the rear connector also includes a fixing ring mounted to move in rotation at the front end of the sleeve. The assembly forms a completed shielding harness for connection to a connector.
  • the object of the present invention is therefore to remedy the aforementioned needs and drawbacks by proposing a rear connection (for shielding termination) for connecting an armored harness comprising shielded cables to a connector, the rear connection comprising a sleeve and a ring.
  • the sleeve having a wall of substantially tubular shape defining an internal passage adapted to receive shielded cables, the wall of the sleeve comprising, from its front end towards its rear end, a latching zone adapted to engage on a connector, through holes distributed circumferentially and adapted to receive the terminations of the cable shields from the internal passage, a first external pad adapted to receive the terminations of the shields, an outer shoulder, and a second outer pad adapted to receive the over-armoring of the harness , the fixing ring having a wall of substantially tubular shape defining u n annular passage adapted to receive the sleeve, the wall of the fixing ring comprising, from its front end towards its rear end, a fixing zone suitable for connection to a connector, a first internal pad, and an internal shoulder, the rear connector being arranged so that the fixing ring can slide over the sleeve in a direction from the rear end towards the front end of the sleeve, to a stop position where
  • the wall of the sleeve has at the front end a flared part on which the engagement zone and the through holes are formed.
  • the through holes are located immediately behind the engagement zone, on a part of the wall up to 20% of the length of the sleeve from its front end.
  • the first external area of the sleeve has a larger external diameter than that of the second external area.
  • the wall of the sleeve comprises an intermediate section flared between the first external surface and the second external surface.
  • the outer shoulder of the sleeve and the inner shoulder of the fixing ring are in the form of a ring.
  • the sleeve is in one piece.
  • the rear connector comprises at least one clamp adapted to secure the ends of the shields by tightening them around the sleeve.
  • the present invention also provides a completed shielded harness comprising a rear connector as described above as well as an over-shielded harness comprising shielded cables, the shielded cables being received by the internal passage of the sleeve, the cable shielding ends passing through. towards the outside of the sleeve through through holes and received on the first external surface of the sleeve while the over-armor is received on the second external surface of the sleeve, and the fixing ring being mounted so as to be able to slide over the sleeve.
  • the present invention also provides a connection between a finished shielded harness as described above and a connector, the cables being electrically connected to the connector, the sleeve engagement zone being engaged on a connector engagement zone, and the fixing ring being connected to a connector fixing area, the sleeve and the fixing ring of the rear connector being in a stop position.
  • FIG. 1 shows a (partial) sectional view of a completed shielding harness mounted on a rear connector according to a first embodiment of the invention
  • FIG. 2 shows an exploded perspective view of the rear connector
  • FIG. 3 shows a cross-sectional view of the rear connector.
  • identical references can designate identical or similar elements.
  • the different parts shown in the figures are not necessarily shown on a uniform scale, in order to make the figures more legible.
  • FIG. 1 illustrates a first embodiment of the rear connection 50. It allows the shielding of a harness 16 to be completed, forming together with the latter “a completed shielding harness”, 70, suitable for being connected to an electrical connector 80 to make a connection 100.
  • the connector 80 is of known type, often used in an aircraft.
  • FIGS 2 and 3 illustrate only the main elements of the rear connector 50, namely a sleeve 20 and a fixing ring 40, in perspective and in cross section respectively, to facilitate understanding of the invention.
  • the rear connector 50 is connected to an over-shielded harness 16 comprising shielded cables 12. It comprises a sleeve 20 and a fixing ring 40, illustrated with the fixing ring 40 slipped over the sleeve 20.
  • the sleeve 20 comprises a wall 25 of substantially tubular shape (of circular cross section) extending along a longitudinal axis, and defining an internal passage 27.
  • the wall 25 of the sleeve comprises, from its front end 21 (left side in the figures) towards its rear end 29, an interlocking zone 22, through holes 24 distributed in a circumferential manner, a first external pad 26, an external shoulder 28, an intermediate section 32, a first flange 34, a second pad outer 36, and a second flange 38.
  • the sleeve 20 is in one piece, and made of an electrically conductive material, typically metal.
  • the sleeve 20 is linked to a harness 16.
  • the harness 16 is of known type and comprises individual shielded cables 12 which are grouped in strand, the latter being surrounded by a shield 17 to protect it from EM disturbances.
  • the cables 12 and the harness 16 may also include layers of insulation in a manner known per se.
  • a connector 80 this harness must be prepared.
  • the harness 16 is stripped and shielded towards one end, which consists in locally removing the external insulation and the shield 17 of the harness 16.
  • the shielded cables 12 of the harness 16 are stripped and unshielded in another place closer towards the end so as to expose the conductive part 13 of the cables 12, while keeping the ends of the shields 14 of the de-shielded cables (/ pigtails) attached to the harness 16.
  • shielded cables 12 of the harness 16 are received in the internal passage 27 of the sleeve 20.
  • the conductive parts 13 of the cables 12 visible towards the end of the harness 16 are intended to be inserted into the contacts from connector 80 to electrically connect cables 12 to connector 80.
  • the endings of shields 14 are inserted through the through holes 24 towards the outside of the sleeve, and are then returned towards the rear of the sleeve, and lengthened on the first external area 26 generally aligned substantially with the longitudinal axis.
  • the first area 26 of the sleeve 20 is intended for the resumption of terminations of the shields 14. It has a generally cylindrical external surface extending parallel to the longitudinal axis. The ends of the shields 14 are secured there with an attachment element 33, for example a clamp 33. It is possible that axial grooves are provided to better receive the ends of the shields 14.
  • the outer shoulder 28 Towards the rear of the first track 26 is the outer shoulder 28, which is in the form of a ring, projecting radially from the wall 25 of the sleeve 20. This outer shoulder 28 is intended to come into abutment with the fixing ring 40 to prevent it from exceeding it , as discussed later in the description.
  • the second external area 36 of the sleeve 20 is intended for the recovery of the armor 17 of the harness. Like the first patch, it has a generally cylindrical outer surface on which the armor plating can be received. This second external area 36 also extends parallel to the longitudinal axis, and allows the security of the over-armor 17 with an attachment element, for example a clamp. The over-armoring 17 of the harness 16 is not received in the internal passage 27 of the sleeve 20, but directly on the second external pad 36.
  • the first flange 34 located in front of the second external area 36, is designed mainly as a stop for the over-armor 17, so that it does not exceed it.
  • a second flange 38 is provided behind the second area 36, and more precisely at the rear end 29 of the sleeve 20.
  • the first outer area 26 has a larger outer diameter than that of the second outer area 36.
  • the diameter of the first area 26 is approximately 1.5 times that of the second area 36.
  • the wall 25 of the sleeve comprises a flared intermediate section 32 between the first zone 26 and the second zone 36, increasing in diameter towards the front end 21 of the sleeve 20.
  • the wall 25 of the sleeve 20 comprises another flared part 23 at its front end 21, of increasing diameter from the first outer surface 26 towards the front end 21 of the sleeve 20.
  • the engagement zone 22 as well as the through holes 24 are located on this flared part 23.
  • the through holes 24 being located on the flared part 23 are therefore inclined, facing towards the front and are also at a diameter greater than the first area 26. Consequently, not only is it easier to handle the terminations of the shields 14 during insertion into the through holes 24, which moreover, they elongate more naturally on the first pad 26 in alignment with the longitudinal axis. This therefore allows a more uniform distribution of the endings of the shields 14 on the sleeve 20.
  • the through holes 24 are located just behind the engagement zone 22, that is to say just behind the crown of teeth 22. This is in a region starting at the front end 21 of the sleeve 20 to 20%, even just preferably 10%, of the length of the sleeve 20.
  • the first advantage of being located in this region is that the shields can be left on each cable 12 closer to the connector 80. In other words , only the parts of the cables 12 to be inserted in the connector 80 are unshielded, which limits crosstalk between the conductive parts 13 of the harness 16 ensuring good EMC as much as possible.
  • the second advantage is that the ends of the shields 14 surround the sleeve 20 until it connects with the connector 80, thus improving the EM protection of the cables 12 within the latter. Finally, being closer to the front end 21 of the sleeve 20, the ends of the shields 14 are also easier to see and to handle during the insertion into the through holes 24, compared to the case where the holes are deeper in the muff.
  • the ends of the shields 14 are therefore also uniformly distributed around the sleeve 20.
  • the through holes 24 are advantageously located in the same plane perpendicular to the longitudinal axis. For practical reasons of inserting the ends of the shields 14, a small part of each of these through holes 24 can be formed in the first area 26.
  • crown of teeth 22 is whole, that is to say that it makes a complete circle. No gap is present, and no missing teeth. When this ring of teeth 22 is engaged on that of the connector 80, a good connection is obtained with minimum electrical resistance and uniform electrical continuity.
  • the fixing ring 40 comprises a wall 45 of substantially tubular shape extending along the longitudinal axis, defining an annular passage 47.
  • the wall 45 of the fixing ring 40 comprising, from its front end 41 towards its rear end 49, a fixing zone 43, an internal pad 46, and an internal shoulder 48.
  • the fixing ring 40 is in one piece, and made of an electrically conductive material, typically metal.
  • the fixing ring 40 is mounted around the sleeve 20, the two being oriented in the same direction with the sleeve 20 received in the annular passage 47 of the fixing ring 40.
  • I t is arranged so that it can slide over the sleeve 20, in a direction from the rear end 29 towards the front end 21 of the sleeve, this up to a stop position (illustrated) where the internal shoulder 48 of the fixing ring 40 abuts with the external shoulder 28 of the sleeve 20.
  • the internal shoulder 48 is in the form of a ring, projecting radially from the wall 45 of the fixing ring 40.
  • the ring of fixing 40 is illustrated in front of a connector 80 for its connection to the latter.
  • the internal area 46 of the fixing ring 40 covers the first external area 26 of the sleeve 20. Consequently, the ends of the shields 14 are entirely covered by the fixing ring 40, this which provides protection against EM disturbances. Unlike the prior art, electromagnetic interference cannot enter through openings or through holes in the sleeve.
  • the assembly comprising the internal pad 46, the internal shoulder 48 and the fixing zone 43 of the fixing ring 40 surrounds the ends of the shields 14, and beyond the front end 21 of the sleeve 20.
  • the rear connector 50 is arranged so that a once connected to the connector 80, the fixing ring completely surrounds the terminations of the shields 14, the engagement zone 22 of the sleeve 20 and the engagement zone 82 of the connector 80 as well as its attachment zone 83.
  • the fact that the fixing ring 40 can slide relative to the sleeve 20 allows it to be removed when the ends of the shields 14 are inserted into the through holes 24, then replaced.
  • O-rings 44 are advantageously used. They are provided just next to the internal shoulder 48, and in front of the internal area 46 of the fixing ring 40. If necessary, circumferential internal grooves can be provided to accommodate the O-rings 44. These O-rings 44 are arranged to be interposed between the fixing ring 40 and the sleeve 20, and between the fixing ring 40 and the connector 80. In addition, a protective sheath (boot) 54 can cover the sleeve 20 from its first flange 34, beyond its rear end 29 to a part of the harness 16. The assembly comprising the O-rings 44 and the protective sheath 54 make it possible to seal the connection.
  • the rear connector 50 of the invention is more efficient than the known rear connectors, above all allowing a reliable connection 100 to be made between an armored harness 16 comprising shielded cables and a connector 80.
  • the ends of the shields 14 of the cables 12 are uniformly distributed around the sleeve 20 and arrive very close to the front end 21 of the sleeve 20. Furthermore, they are completely covered by the fixing ring 40 when it is in the stop position.
  • the rear connector 50 is made of two main elements which are each in one piece.
  • the sleeve 20 comprises an entire crown of teeth 22.
  • the overlays of the shield 17 and of the ends of the shields 14 on the sleeve 20 prevent the forces from being applied directly to the conductive parts 13 plugged into the connector 80.
  • the distribution as well as the positioning of the ends of the shields 14 on the rear connector 50 ensure better continuity electrical and reduced transfer impedance. Having only two main elements, the rear connector 50 is easier to install on a harness 16, and less likely to be lost.
  • the connection of the shield 17 and the shields 14 (to the connector) is provided by a single conductive part, having much better electrical continuity than a sleeve made of several parts. As a result, the rear connector 50 is more efficient in terms of EMC.
  • the invention has been described in connection with an over-armored harness comprising shielded cables. However, it is also suitable for other cables, for example an unshielded harness with shielded cables, or even a single shielded cable.
  • the invention can be used at the same time as other known means of protection against EM disturbances.
  • the rear connector of the invention can be retro-adapted (or “retrofitted” in English) to the connections already existing on the aircraft.
  • the intermediate section can be a flange perpendicular to the axis and integrate, if necessary, the outer shoulder of the sleeve.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The invention relates to a rear connection (50) for connecting an over-shielded harness (16) including shielded cables (12) to a connector (80), the rear connection (50) comprising a sleeve (20) having an entire crown of teeth (22), a first outer pad (26) suitable for receiving shielding terminations (14), and a second outer pad (36) suitable for receiving the over-shielding (17) of the harness, the rear connection (50) further comprising a securing ring (40) having a first inner pad (46) and arranged so that it can slide over the sleeve (20) to an abutting position in which it covers the first outer pad (26) of the sleeve (20) in order to thus cover the terminations of the shieldings (14). This rear connection (50) is suitable for forming a harness with terminated shielding (70), as well as a connection protected against EM disturbances (100) between the harness with terminated shielding (70) and a connector (80).

Description

RACCORD ARRIÈRE AVEC PROTECTION ÉLECTROMAGNÉTIQUE REAR CONNECTION WITH ELECTROMAGNETIC PROTECTION
DOMAINE TECHNIQUE TECHNICAL AREA
L'invention concerne de manière générale un raccord arrière. Plus particulièrement, l'invention concerne un raccord arrière capable de raccorder un harnais surblindé comportant des câbles blindés à un connecteur de manière fiable et de sorte à minimiser les perturbations électromagnétiques. L'invention concerne aussi un harnais à blindage terminé ainsi qu'une connexion comprenant ce raccord arrière. The invention relates generally to a rear connector. More particularly, the invention relates to a rear connector capable of connecting an armored harness comprising shielded cables to a connector in a reliable manner and so as to minimize the electromagnetic disturbances. The invention also relates to a completed shielding harness and a connection comprising this rear connector.
ÉTAT DE LA TECHNIQUE ANTÉRIEURE STATE OF THE PRIOR ART
Dans les aéronefs, les raccordements électriques se font essentiellement grâce à des harnais électriques. Durant le vol d'un aéronef, plusieurs contraintes s'appliquent directement ou indirectement aux harnais électriques, notamment dans les zones moteurs. Ces contraintes peuvent être de nature mécanique, électrique ou environnementale. In aircraft, electrical connections are mainly made using electrical harnesses. During the flight of an aircraft, several constraints apply directly or indirectly to electrical harnesses, especially in the engine areas. These constraints can be mechanical, electrical or environmental.
Les contraintes mécaniques (ex. les vibrations) peuvent notamment endommager les extrémités du harnais et/ou entraîner une usure, une coupure ou une détérioration de la connexion susceptible de créer une résistance de contact indésirable. Mechanical stresses (eg vibrations) can in particular damage the ends of the harness and / or cause wear, a break or deterioration of the connection, which could create undesirable contact resistance.
Par ailleurs, l'installation électrique d'un système doit respecter des contraintes de compatibilité électromagnétique (CEM), c'est-à-dire pouvoir fonctionner dans un environnement sans perturber les systèmes qui s'y trouvent déjà, et sans être perturbé par ces systèmes ni par des perturbations externes telles que la foudre, un champ électromagnétique fort (radar), etc. Furthermore, the electrical installation of a system must comply with electromagnetic compatibility (EMC) constraints, that is to say be able to operate in an environment without disturbing the systems already there, and without being disturbed by these systems or by external disturbances such as lightning, a strong electromagnetic field (radar), etc.
A cet effet, les liaisons électriques présentent en général un blindage qui permet d'atténuer les perturbations reçues ou émises. Les blindages peuvent être sur un câble individuel (blindage) et/ou sur l'ensemble du toron/harnais (surblindage). Pour assurer la protection CEM d'un système, le blindage électromagnétique doit couvrir l'ensemble des zones du harnais entre les boîtiers contenant les équipements. L'utilisation de ces raccords arrière (ou « backshells » en anglais), assemblés aux connecteurs électriques, doit pouvoir répondre aux exigences électriques et mécaniques. To this end, the electrical connections generally have a shield which makes it possible to attenuate the disturbances received or emitted. The shields can be on an individual cable (shield) and / or on the whole of the strand / harness (over-shielding). To ensure EMC protection of a system, the electromagnetic shielding must cover all the areas of the harness between the boxes containing the equipment. Use of these rear fittings (or “backshells” in English), assembled with the electrical connectors, must be able to meet the electrical and mechanical requirements.
Ces raccords doivent assurer à la fois des fonctions mécaniques, à savoir être conçus pour supporter les vibrations dans les zones les plus sévères, répondre aux besoins d'intégration tels que l'orientation des harnais, mais aussi assurer des fonctions électriques, telles que la reprise de blindage des câbles, la protection électromagnétique du harnais, une CEM efficace et, ce, avec une impédance de transfert la plus faible possible. These fittings must both provide mechanical functions, i.e. be designed to withstand vibrations in the most severe areas, meet integration needs such as the orientation of harnesses, but also provide electrical functions, such as resumption of cable shielding, electromagnetic protection of the harness, effective EMC and this, with the lowest possible transfer impedance.
La demande US-A-5052947 divulgue un raccord arrière (terminaison de blindage) pour un harnais surblindé comportant des câbles blindés. Le raccord arrière comprend un manchon et un anneau de fixation. Le surblindage du harnais est relié à une plage à l'arrière du manchon et est sécurisé sur ce dernier par un collier de serrage. Les câbles passent à l'intérieur du manchon. Les extrémités des câbles ont leurs parties conductrices exposées. Cependant, les terminaisons de blindage des câbles passent par les trous traversants vers l'extérieur, et rejoignent ensuite une plage à l'avant du manchon sur lequel ils sont sécurisées au moyen d'un collier de serrage. Le raccord arrière comprend également un anneau de fixation monté mobile en rotation à l'extrémité avant du manchon. L'ensemble forme un harnais à blindage terminé pour le raccordement à un connecteur. Application US-A-5052947 discloses a rear connector (shield termination) for an over-shielded harness having shielded cables. The rear connector includes a sleeve and a fixing ring. The harness armor is connected to a pad at the rear of the sleeve and is secured on the latter by a clamp. The cables pass inside the sleeve. The ends of the cables have their conductive parts exposed. However, the cable shield terminations pass through the through holes to the outside, and then join a range at the front of the sleeve on which they are secured by means of a cable tie. The rear connector also includes a fixing ring mounted to move in rotation at the front end of the sleeve. The assembly forms a completed shielding harness for connection to a connector.
Cependant, la surépaisseur locale des terminaisons de blindage laisse des « ouvertures » entre la paroi du raccord arrière et le collier de serrage lors du serrage de ce dernier. Quand ce harnais à blindage terminé est monté sur un connecteur, les perturbations électromagnétiques peuvent passer par ces ouvertures puis dans les trous traversants du manchon et générer des interférences sur les câbles. La gaine de protection (boot) prévue ne permet pas de faire un écran à ses perturbations. Par conséquent, la protection contre les perturbations EM n'est pas satisfaisante, ce raccord arrière n'est pas optimal en termes de CEM et l'impédance de transfert est relativement élevée. However, the local excess thickness of the shielding terminations leaves "openings" between the wall of the rear connector and the clamp when tightening the latter. When this completed shielded harness is mounted on a connector, electromagnetic interference can pass through these openings and then through the through holes of the sleeve and generate interference on the cables. The protective boot (planned) does not make it possible to make a screen to its disturbances. Consequently, the EM interference protection is not satisfactory, this rear connection is not optimal in terms of EMC and the transfer impedance is relatively high.
Qui plus est, sur certains raccords arrière, pour faciliter la reprise des terminaisons des blindages sur le manchon, des fentes sont prévues, s'étendant de la couronne de dents jusqu'aux trous. Il en résulte que la couronne n'est pas entière, impliquant par conséquent, une continuité électrique non uniforme et une résistance de contact élevée. Parfois, le manchon est réalisé en plusieurs pièces, ce qui a également pour conséquence que le raccordement de surblindage et des blindages (au connecteur) ne présente pas l'uniformité de continuité électrique désirée. What is more, on certain rear fittings, to facilitate the recovery of the endings of the shields on the sleeve, slots are provided, extending from the crown of teeth to the holes. As a result, the crown is not whole, implying therefore, non-uniform electrical continuity and resistance of high contact. Sometimes the sleeve is made in several pieces, which also has the consequence that the connection of the shielding and shields (to the connector) does not have the desired uniformity of electrical continuity.
Il existe donc un besoin pour un raccord arrière capable de raccorder un harnais surblindé, comportant des câbles blindés, à un connecteur de manière fiable avec une bonne continuité électrique et donc une résistance électrique faible, de manière à minimiser les perturbations électromagnétiques et garantir une faible impédance de transfert. There is therefore a need for a rear connector capable of connecting an over-armored harness, comprising shielded cables, to a connector reliably with good electrical continuity and therefore a low electrical resistance, so as to minimize the electromagnetic disturbances and guarantee a low transfer impedance.
EXPOSÉ DE L'INVENTION STATEMENT OF THE INVENTION
L'objet de la présente invention est par conséquent de remédier aux besoins et inconvénients précités en proposant un raccord arrière (de terminaison de blindage) pour raccorder un harnais surblindé comportant des câbles blindés à un connecteur, le raccord arrière comprenant un manchon et un anneau de fixation, le manchon ayant une paroi de forme sensiblement tubulaire définissant un passage interne adapté à recevoir des câbles blindés, la paroi du manchon comprenant, depuis son extrémité avant vers son extrémité arrière, une zone d'enclenchement adaptée pour engager sur un connecteur, des trous traversants répartis de manière circonférentielle et adaptés à recevoir les terminaisons des blindages des câbles depuis le passage interne, une première plage externe adaptée à recevoir les terminaisons des blindages, une épaule externe, et une deuxième plage externe adaptée à recevoir le surblindage du harnais, l'anneau de fixation ayant une paroi de forme sensiblement tubulaire définissant un passage annulaire adapté à recevoir le manchon, la paroi de l'anneau de fixation comprenant, depuis son extrémité avant vers son extrémité arrière, une zone de fixation adaptée pour la raccordement à un connecteur, une première plage interne, et une épaule interne, le raccord arrière étant agencé de sorte que l'anneau de fixation puisse glisser au- dessus du manchon dans un sens allant de l'extrémité arrière vers l'extrémité avant du manchon, jusqu'à une position en butée où l'épaule interne de l'anneau de fixation vient en butée avec l'épaule externe du manchon, la plage interne de l'anneau de fixation couvrant la première plage externe du manchon dans la position en butée, l'anneau de fixation étant ainsi agencé pour couvrir les terminaisons des blindages, et la zone d'enclenchement du manchon comprenant une couronne entière de dents adaptée pour s'engager sur le connecteur. The object of the present invention is therefore to remedy the aforementioned needs and drawbacks by proposing a rear connection (for shielding termination) for connecting an armored harness comprising shielded cables to a connector, the rear connection comprising a sleeve and a ring. fixing, the sleeve having a wall of substantially tubular shape defining an internal passage adapted to receive shielded cables, the wall of the sleeve comprising, from its front end towards its rear end, a latching zone adapted to engage on a connector, through holes distributed circumferentially and adapted to receive the terminations of the cable shields from the internal passage, a first external pad adapted to receive the terminations of the shields, an outer shoulder, and a second outer pad adapted to receive the over-armoring of the harness , the fixing ring having a wall of substantially tubular shape defining u n annular passage adapted to receive the sleeve, the wall of the fixing ring comprising, from its front end towards its rear end, a fixing zone suitable for connection to a connector, a first internal pad, and an internal shoulder, the rear connector being arranged so that the fixing ring can slide over the sleeve in a direction from the rear end towards the front end of the sleeve, to a stop position where the internal shoulder of the fixing ring abuts with the outer shoulder of the sleeve, the internal range of the fixing ring covering the first external area of the sleeve in the abutment position, the fixing ring being thus arranged to cover the ends of the shields, and the sleeve engagement zone comprising an entire crown of teeth adapted to engage on the connector .
De préférence, la paroi du manchon comporte à l'extrémité avant une partie évasée sur laquelle est formée la zone d'enclenchement et les trous traversants. Preferably, the wall of the sleeve has at the front end a flared part on which the engagement zone and the through holes are formed.
De préférence, les trous traversants sont situés immédiatement derrière la zone d'enclenchement, sur une partie de la paroi jusqu'à 20% de la longueur du manchon depuis son extrémité avant. Preferably, the through holes are located immediately behind the engagement zone, on a part of the wall up to 20% of the length of the sleeve from its front end.
De préférence encore, la première plage externe du manchon présente un diamètre externe plus large que celui de la deuxième plage externe. More preferably, the first external area of the sleeve has a larger external diameter than that of the second external area.
Avantageusement, la paroi du manchon comprend une section intermédiaire évasée entre la première plage externe et la deuxième plage externe. Advantageously, the wall of the sleeve comprises an intermediate section flared between the first external surface and the second external surface.
De préférence, l'épaule externe du manchon et l'épaule interne de l'anneau de fixation sont en forme de bague. Preferably, the outer shoulder of the sleeve and the inner shoulder of the fixing ring are in the form of a ring.
De préférence encore, le manchon est d'un seul tenant. More preferably, the sleeve is in one piece.
De préférence, le raccord arrière comprend au moins un collier de serrage adapté pour sécuriser les terminaisons des blindages en les serrant autour du manchon. Preferably, the rear connector comprises at least one clamp adapted to secure the ends of the shields by tightening them around the sleeve.
La présente invention propose aussi un harnais à blindage terminé comprenant un raccord arrière tel que décrit ci-dessus ainsi qu'un harnais surblindé comportant des câbles blindés, les câbles blindés étant reçus par le passage interne du manchon, les terminaisons des blindages des câbles passant vers l'extérieur du manchon par des trous traversants et reçus sur la première plage externe du manchon tandis que le surblindage est reçu sur la deuxième plage externe du manchon, et l'anneau de fixation étant monté mobile pour glisser au-dessus du manchon. The present invention also provides a completed shielded harness comprising a rear connector as described above as well as an over-shielded harness comprising shielded cables, the shielded cables being received by the internal passage of the sleeve, the cable shielding ends passing through. towards the outside of the sleeve through through holes and received on the first external surface of the sleeve while the over-armor is received on the second external surface of the sleeve, and the fixing ring being mounted so as to be able to slide over the sleeve.
La présente invention propose aussi une connexion entre un harnais à blindage terminé tel que décrit ci-dessus et un connecteur, les câbles étant connectés électriquement au connecteur, la zone d'enclenchement du manchon étant engagée sur une zone d'enclenchement du connecteur, et l'anneau de fixation étant raccordé à une zone de fixation du connecteur, le manchon et l'anneau de fixation du raccord arrière étant dans une position en butée. The present invention also provides a connection between a finished shielded harness as described above and a connector, the cables being electrically connected to the connector, the sleeve engagement zone being engaged on a connector engagement zone, and the fixing ring being connected to a connector fixing area, the sleeve and the fixing ring of the rear connector being in a stop position.
BRÈVE DESCRIPTION DES DESSINS BRIEF DESCRIPTION OF THE DRAWINGS
Il est décrit par la suite, à titre d'exemples non limitatifs, des modes de réalisation de l'invention préférés, en se référant aux dessins annexés, dans lesquels : Preferred embodiments of the invention are described below, by way of non-limiting examples, with reference to the appended drawings, in which:
- la figure 1 présente une vue en coupe (partielle) d'un harnais à blindage terminé monté sur un raccord arrière selon un premier mode de réalisation de l'invention ; - Figure 1 shows a (partial) sectional view of a completed shielding harness mounted on a rear connector according to a first embodiment of the invention;
- la figure 2 présente une vue éclatée en perspective du raccord arrière, et FIG. 2 shows an exploded perspective view of the rear connector, and
- la figure 3 présente une vue en coupe transversale du raccord arrière. Dans toutes ces figures, des références identiques peuvent désigner des éléments identiques ou similaires. En outre, les différentes parties représentées sur les figures ne le sont pas nécessairement selon une échelle uniforme, afin de rendre les figures plus lisibles. - Figure 3 shows a cross-sectional view of the rear connector. In all these figures, identical references can designate identical or similar elements. In addition, the different parts shown in the figures are not necessarily shown on a uniform scale, in order to make the figures more legible.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERS DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS
La figure 1 illustre un premier mode de réalisation du raccord arrière 50. Il permet de terminer le blindage d'un harnais 16, formant ensemble avec ce dernier « un harnais à blindage terminé », 70, adapté à être raccordé à un connecteur électrique 80 pour réaliser une connexion 100. Le connecteur 80 est de type connu, souvent utilisé dans un aéronef. FIG. 1 illustrates a first embodiment of the rear connection 50. It allows the shielding of a harness 16 to be completed, forming together with the latter “a completed shielding harness”, 70, suitable for being connected to an electrical connector 80 to make a connection 100. The connector 80 is of known type, often used in an aircraft.
Les figures 2 et 3 illustrent uniquement les éléments principaux du raccord arrière 50, à savoir un manchon 20 et un anneau de fixation 40, en perspective et en coupe transversale respectivement, pour faciliter la compréhension de l'invention. Figures 2 and 3 illustrate only the main elements of the rear connector 50, namely a sleeve 20 and a fixing ring 40, in perspective and in cross section respectively, to facilitate understanding of the invention.
Le raccord arrière 50 est raccordé à un harnais surblindé 16 comportant des câbles blindés 12. I l comprend un manchon 20 et un anneau de fixation 40, illustré avec l'anneau de fixation 40 glissé au-dessus du manchon 20. Le manchon 20 comprend une paroi 25 de forme sensiblement tubulaire (de section transversale circulaire) s'étendant le long d'un axe longitudinal, et définissant un passage interne 27. La paroi 25 du manchon comprend, depuis son extrémité avant 21 (côté gauche dans les figures) vers son extrémité arrière 29, une zone d'enclenchement 22, des trous traversants 24 répartis de manière circonférentielle, une première plage externe 26, une épaule externe 28, une section intermédiaire 32, un premier rebord 34, une deuxième plage externe 36, et un deuxième rebord 38. Le manchon 20 est d'un seul tenant, et réalisé en un matériau conducteur électrique, typiquement en métal. Le manchon 20 est lié à un harnais 16. The rear connector 50 is connected to an over-shielded harness 16 comprising shielded cables 12. It comprises a sleeve 20 and a fixing ring 40, illustrated with the fixing ring 40 slipped over the sleeve 20. The sleeve 20 comprises a wall 25 of substantially tubular shape (of circular cross section) extending along a longitudinal axis, and defining an internal passage 27. The wall 25 of the sleeve comprises, from its front end 21 (left side in the figures) towards its rear end 29, an interlocking zone 22, through holes 24 distributed in a circumferential manner, a first external pad 26, an external shoulder 28, an intermediate section 32, a first flange 34, a second pad outer 36, and a second flange 38. The sleeve 20 is in one piece, and made of an electrically conductive material, typically metal. The sleeve 20 is linked to a harness 16.
Le harnais 16 est de type connu et comporte des câbles individuels blindés 12 qui sont regroupés en toron, celui-ci étant entouré d'un surblindage 17 pour le protéger des perturbations EM. Les câbles 12 et le harnais 16 peuvent également comprendre des couches d'isolant de manière connue en soi. Pour raccorder un harnais avec un raccord arrière 50, puis un connecteur 80, ce harnais doit être préparé. De manière connue, le harnais 16 est dénudé et déblindé vers une extrémité, ce qui consiste à supprimer localement l'isolant extérieur et le surblindage 17 du harnais 16. Ensuite, les câbles blindés 12 du harnais 16 sont dénudés et déblindés à un endroit encore plus proche vers l'extrémité afin d'exposer alors la partie conductrice 13 des câbles 12, tout en gardant les terminaisons des blindages 14 des câbles déblindés (/queues de cochon) rattachés au harnais 16. The harness 16 is of known type and comprises individual shielded cables 12 which are grouped in strand, the latter being surrounded by a shield 17 to protect it from EM disturbances. The cables 12 and the harness 16 may also include layers of insulation in a manner known per se. To connect a harness with a rear connector 50, then a connector 80, this harness must be prepared. In known manner, the harness 16 is stripped and shielded towards one end, which consists in locally removing the external insulation and the shield 17 of the harness 16. Then, the shielded cables 12 of the harness 16 are stripped and unshielded in another place closer towards the end so as to expose the conductive part 13 of the cables 12, while keeping the ends of the shields 14 of the de-shielded cables (/ pigtails) attached to the harness 16.
Comme on peut voir sur la figure 1, des câbles blindés 12 du harnais 16 sont reçus dans le passage interne 27 du manchon 20. Les parties conductrices 13 des câbles 12 visibles vers l'extrémité du harnais 16 sont destinées à être enfichées dans les contacts du connecteur 80 pour connecter électriquement les câbles 12 au connecteur 80. Cependant, les terminaisons des blindages 14 sont insérées à travers les trous traversants 24 vers l'extérieur du manchon, et sont ensuite retournées vers l'arrière du manchon, et allongées sur la première plage externe 26 de manière généralement alignées sensiblement avec l'axe longitudinal. As can be seen in Figure 1, shielded cables 12 of the harness 16 are received in the internal passage 27 of the sleeve 20. The conductive parts 13 of the cables 12 visible towards the end of the harness 16 are intended to be inserted into the contacts from connector 80 to electrically connect cables 12 to connector 80. However, the endings of shields 14 are inserted through the through holes 24 towards the outside of the sleeve, and are then returned towards the rear of the sleeve, and lengthened on the first external area 26 generally aligned substantially with the longitudinal axis.
La première plage 26 du manchon 20 est destinée à la reprise de terminaisons des blindages 14. Elle présente une surface externe généralement cylindrique s'étendant parallèlement à l'axe longitudinal. Les terminaisons des blindages 14 y sont sécurisées avec un élément d'attache 33, par exemple un collier de serrage 33. Il est envisageable que des rainures axiales soient prévues pour mieux recevoir les terminaisons des blindages 14. Vers l'arrière de la première plage 26 se trouve l'épaule externe 28, qui est en forme de bague, saillante radialement de la paroi 25 du manchon 20. Cette épaule externe 28 est destinée à venir en butée avec l'anneau de fixation 40 pour empêcher qu'il la dépasse, comme exposé plus loin dans la description. The first area 26 of the sleeve 20 is intended for the resumption of terminations of the shields 14. It has a generally cylindrical external surface extending parallel to the longitudinal axis. The ends of the shields 14 are secured there with an attachment element 33, for example a clamp 33. It is possible that axial grooves are provided to better receive the ends of the shields 14. Towards the rear of the first track 26 is the outer shoulder 28, which is in the form of a ring, projecting radially from the wall 25 of the sleeve 20. This outer shoulder 28 is intended to come into abutment with the fixing ring 40 to prevent it from exceeding it , as discussed later in the description.
La deuxième plage externe 36 du manchon 20 est destinée à la reprise de surblindage 17 du harnais. Comme la première plage, elle présente une surface externe généralement cylindrique sur laquelle le surblindage peut être reçu. Cette deuxième plage externe 36 s'étend aussi parallèlement à l'axe longitudinal, et permet la sécurisation de surblindage 17 avec un élément d'attache, par exemple un collier de serrage. Le surblindage 17 du harnais 16 n'est pas reçu dans le passage interne 27 du manchon 20, mais directement sur la deuxième plage externe 36. The second external area 36 of the sleeve 20 is intended for the recovery of the armor 17 of the harness. Like the first patch, it has a generally cylindrical outer surface on which the armor plating can be received. This second external area 36 also extends parallel to the longitudinal axis, and allows the security of the over-armor 17 with an attachment element, for example a clamp. The over-armoring 17 of the harness 16 is not received in the internal passage 27 of the sleeve 20, but directly on the second external pad 36.
Le premier rebord 34, situé en avant de la deuxième plage externe 36, est conçu principalement comme butée pour le surblindage 17, afin qu'il ne le dépasse pas. Un deuxième rebord 38 est prévu en arrière de la deuxième plage 36, et plus précisément à l'extrémité arrière 29 du manchon 20. Quand le surblindage 17 est fixé autour de la deuxième plage 36 avec un élément d'attache, ces deux rebords 34, 38 empêchent qu'il ne se désolidarise aisément. The first flange 34, located in front of the second external area 36, is designed mainly as a stop for the over-armor 17, so that it does not exceed it. A second flange 38 is provided behind the second area 36, and more precisely at the rear end 29 of the sleeve 20. When the over-armor 17 is fixed around the second area 36 with an attachment element, these two edges 34 , 38 prevent it from dissociating easily.
La première plage externe 26 présente un diamètre externe plus large que celui de la deuxième plage externe 36. Dans cette réalisation, le diamètre de la première plage 26 est environ 1.5 fois celui de la deuxième plage 36. Afin d'intégrer ces plages externes, la paroi 25 du manchon comprend une section intermédiaire évasée 32 entre la première plage 26 et la deuxième plage 36, augmentant en diamètre vers l'extrémité avant 21 du manchon 20. The first outer area 26 has a larger outer diameter than that of the second outer area 36. In this embodiment, the diameter of the first area 26 is approximately 1.5 times that of the second area 36. In order to integrate these outer areas, the wall 25 of the sleeve comprises a flared intermediate section 32 between the first zone 26 and the second zone 36, increasing in diameter towards the front end 21 of the sleeve 20.
La paroi 25 du manchon 20 comprend une autre partie évasée 23 à son extrémité avant 21, de diamètre croissant depuis la première plage 26 externe vers l'extrémité avant 21 du manchon 20. La zone d'enclenchement 22 ainsi que les trous traversants 24 sont situés sur cette partie évasée 23. Les trous traversants 24 étant situés sur la partie évasée 23 sont donc inclinés, faisant face vers le devant et sont aussi à un diamètre supérieur à la première plage 26. En conséquence, non seulement il est plus facile à manipuler les terminaisons des blindages 14 pendant l'insertion dans les trous traversants 24, qui plus est, elles s'allongent plus naturellement sur la première plage 26 en alignement avec l'axe longitudinal. Cela permet donc une distribution des terminaisons des blindages 14 plus uniforme sur le manchon 20. The wall 25 of the sleeve 20 comprises another flared part 23 at its front end 21, of increasing diameter from the first outer surface 26 towards the front end 21 of the sleeve 20. The engagement zone 22 as well as the through holes 24 are located on this flared part 23. The through holes 24 being located on the flared part 23 are therefore inclined, facing towards the front and are also at a diameter greater than the first area 26. Consequently, not only is it easier to handle the terminations of the shields 14 during insertion into the through holes 24, which moreover, they elongate more naturally on the first pad 26 in alignment with the longitudinal axis. This therefore allows a more uniform distribution of the endings of the shields 14 on the sleeve 20.
Par ailleurs, on constate que les trous traversants 24 sont situés juste derrière la zone d'enclenchement 22, c'est-à-dire juste derrière la couronne de dents 22. Ceci est dans une région commençant à l'extrémité avant 21 du manchon 20 jusqu'à 20%, même juste 10% de préférence, de la longueur du manchon 20. Le premier avantage d'être situé sur cette région est que les blindages peuvent être laissés sur chaque câble 12 plus proche au connecteur 80. Autrement dit, seules les parties des câbles 12 à enficher dans le connecteur 80 sont déblindées, ce qui limite au maximum la diaphonie entre les parties conductrices 13 du harnais 16 assurant une bonne CEM. Furthermore, it can be seen that the through holes 24 are located just behind the engagement zone 22, that is to say just behind the crown of teeth 22. This is in a region starting at the front end 21 of the sleeve 20 to 20%, even just preferably 10%, of the length of the sleeve 20. The first advantage of being located in this region is that the shields can be left on each cable 12 closer to the connector 80. In other words , only the parts of the cables 12 to be inserted in the connector 80 are unshielded, which limits crosstalk between the conductive parts 13 of the harness 16 ensuring good EMC as much as possible.
Le deuxième avantage est que les terminaisons des blindages 14 entourent le manchon 20 jusqu'à sa connexion avec le connecteur 80, améliorant donc la protection EM des câbles 12 au sein de ce dernier. Finalement, étant plus proche de l'extrémité avant 21 du manchon 20 les terminaisons des blindages 14 sont aussi plus faciles à voir et à manipuler pendant l'insertion dans les trous traversants 24, par rapport au cas où les trous sont plus profonds dans le manchon. The second advantage is that the ends of the shields 14 surround the sleeve 20 until it connects with the connector 80, thus improving the EM protection of the cables 12 within the latter. Finally, being closer to the front end 21 of the sleeve 20, the ends of the shields 14 are also easier to see and to handle during the insertion into the through holes 24, compared to the case where the holes are deeper in the muff.
Comme ces trous traversants 24 sont répartis de manière circonférentielle et uniforme sur la paroi 25 du manchon 20, les terminaisons des blindages 14 sont par conséquent également répartis de manière uniforme autour du manchon 20. Bien que ce ne soit pas obligatoire, les trous traversants 24 sont avantageusement situés dans un même plan perpendiculaire à l'axe longitudinal. Pour des raisons pratiques d'insertion des terminaisons des blindages 14, une faible partie de chacun de ces trous traversants 24 peut être formée dans la première plage 26. As these through holes 24 are distributed circumferentially and uniformly on the wall 25 of the sleeve 20, the ends of the shields 14 are therefore also uniformly distributed around the sleeve 20. Although this is not compulsory, the through holes 24 are advantageously located in the same plane perpendicular to the longitudinal axis. For practical reasons of inserting the ends of the shields 14, a small part of each of these through holes 24 can be formed in the first area 26.
Sur l'extrémité avant 21 du manchon 20, se trouve une zone d'enclenchement 22 en forme d'une couronne de dents 22. Les dents permettent un meilleur engagement sur une surface plus large avec le connecteur 80, qui est lui-même pourvu d'une zone d'enclenchement 82 en forme d'une couronne de dents 82. Par ailleurs, cet engagement empêche la rotation entre le manchon 20 (et donc le harnais 16) et le connecteur 80 une fois le raccordement réalisé. On the front end 21 of the sleeve 20, there is an engagement zone 22 in the form of a crown of teeth 22. The teeth allow a better engagement on a larger surface with the connector 80, which is itself provided with an interlocking zone 82 in the form of a crown of teeth 82. Furthermore, this engagement prevents rotation between the sleeve 20 (and therefore the harness 16) and the connector 80 once the connection has been made.
De manière importante, on note que la couronne de dents 22 est entière, c'est-à-dire qu'elle fait un cercle complet. Aucune fente n'est présente, et aucune dent manquante. Quand cette couronne de dents 22 est engagée sur celle du connecteur 80, on obtient une bonne connexion avec une résistance électrique minimale et une continuité électrique uniforme. Importantly, we note that the crown of teeth 22 is whole, that is to say that it makes a complete circle. No gap is present, and no missing teeth. When this ring of teeth 22 is engaged on that of the connector 80, a good connection is obtained with minimum electrical resistance and uniform electrical continuity.
L'anneau de fixation 40 comprend une paroi 45 de forme sensiblement tubulaire s'étendant le long de l'axe longitudinal, définissant un passage annulaire 47. La paroi 45 de l'anneau de fixation 40 comprenant, depuis son extrémité avant 41 vers son extrémité arrière 49, une zone de fixation 43, une plage interne 46, et une épaule interne 48. L'anneau de fixation 40 est d'un seul tenant, et réalisé en un matériau conducteur électrique, typiquement en métal. The fixing ring 40 comprises a wall 45 of substantially tubular shape extending along the longitudinal axis, defining an annular passage 47. The wall 45 of the fixing ring 40 comprising, from its front end 41 towards its rear end 49, a fixing zone 43, an internal pad 46, and an internal shoulder 48. The fixing ring 40 is in one piece, and made of an electrically conductive material, typically metal.
Faisant référence encore à la figure 1, l'anneau de fixation 40 est monté autour du manchon 20, les deux étant orientés dans le même sens avec le manchon 20 reçu dans le passage annulaire 47 de l'anneau de fixation 40. I l est agencé de sorte qu'il puisse glisser au-dessus du manchon 20, dans un sens allant de l'extrémité arrière 29 vers l'extrémité avant 21 du manchon, ce jusqu'à une position en butée (illustrée) où l'épaule interne 48 de l'anneau de fixation 40 vient en butée avec l'épaule externe 28 du manchon 20. L'épaule interne 48 est en forme de bague, saillant radialement de la paroi 45 de l'anneau de fixation 40. L'anneau de fixation 40 est illustré devant un connecteur 80 pour son raccordement à ce dernier. Referring again to Figure 1, the fixing ring 40 is mounted around the sleeve 20, the two being oriented in the same direction with the sleeve 20 received in the annular passage 47 of the fixing ring 40. I t is arranged so that it can slide over the sleeve 20, in a direction from the rear end 29 towards the front end 21 of the sleeve, this up to a stop position (illustrated) where the internal shoulder 48 of the fixing ring 40 abuts with the external shoulder 28 of the sleeve 20. The internal shoulder 48 is in the form of a ring, projecting radially from the wall 45 of the fixing ring 40. The ring of fixing 40 is illustrated in front of a connector 80 for its connection to the latter.
On constate que dans la position en butée, la plage interne 46 de l'anneau de fixation 40 couvre la première plage externe 26 du manchon 20. Par conséquent, les terminaisons des blindages 14 sont entièrement couvertes par l'anneau de fixation 40, ce qui assure une protection contre les perturbations EM. A la différence de l'art antérieur, les perturbations électromagnétiques ne peuvent pas entrer via des ouvertures ou les trous traversants du manchon. L'ensemble comportant la plage interne 46, l'épaule interne 48 et la zone de fixation 43 de l'anneau de fixation 40 entoure les terminaisons des blindages 14, et au-delà de l'extrémité avant 21 du manchon 20. En effet, le raccord arrière 50 est agencé de manière à ce qu'une fois raccordé au connecteur 80, l'anneau de fixation entoure complètement les terminaisons des blindages 14, la zone d'enclenchement 22 du manchon 20 et la zone d'enclenchement 82 du connecteur 80 ainsi que sa zone de fixation 83. It can be seen that in the abutment position, the internal area 46 of the fixing ring 40 covers the first external area 26 of the sleeve 20. Consequently, the ends of the shields 14 are entirely covered by the fixing ring 40, this which provides protection against EM disturbances. Unlike the prior art, electromagnetic interference cannot enter through openings or through holes in the sleeve. The assembly comprising the internal pad 46, the internal shoulder 48 and the fixing zone 43 of the fixing ring 40 surrounds the ends of the shields 14, and beyond the front end 21 of the sleeve 20. In fact, the rear connector 50 is arranged so that a once connected to the connector 80, the fixing ring completely surrounds the terminations of the shields 14, the engagement zone 22 of the sleeve 20 and the engagement zone 82 of the connector 80 as well as its attachment zone 83.
Il faut noter également que le fait que l'anneau de fixation 40 puisse glisser par rapport au manchon 20 lui permet d'être retiré lorsque les terminaisons des blindages 14 sont insérées dans les trous traversants 24, puis remis en place. It should also be noted that the fact that the fixing ring 40 can slide relative to the sleeve 20 allows it to be removed when the ends of the shields 14 are inserted into the through holes 24, then replaced.
Afin d'assurer/ améliorer l'étanchéité, des joints toriques 44 sont avantageusement utilisés. Ils sont prévus juste à côté de l'épaule interne 48, et devant la plage interne 46 de l'anneau de fixation 40. Si nécessaire, des rainures internes circonférentielles peuvent être prévues pour loger les joints toriques 44. Ces joints toriques 44 sont agencés pour être interposés entre l'anneau de fixation 40 et le manchon 20, et entre l'anneau de fixation 40 et le connecteur 80. En supplément, une gaine de protection (boot) 54 peut couvrir le manchon 20 depuis son premier rebord 34, au-delà de son extrémité arrière 29 jusqu'au une partie du harnais 16. L'ensemble comportant les joints toriques 44 et la gaine de protection 54 permettent de rendre la connexion étanche. In order to ensure / improve sealing, O-rings 44 are advantageously used. They are provided just next to the internal shoulder 48, and in front of the internal area 46 of the fixing ring 40. If necessary, circumferential internal grooves can be provided to accommodate the O-rings 44. These O-rings 44 are arranged to be interposed between the fixing ring 40 and the sleeve 20, and between the fixing ring 40 and the connector 80. In addition, a protective sheath (boot) 54 can cover the sleeve 20 from its first flange 34, beyond its rear end 29 to a part of the harness 16. The assembly comprising the O-rings 44 and the protective sheath 54 make it possible to seal the connection.
Le raccord arrière 50 de l'invention est plus performant que les raccords arrière connus, en permettant avant tout de réaliser une connexion 100 fiable entre un harnais surblindé 16 comportant des câbles blindés et un connecteur 80. Les terminaisons des blindages 14 des câbles 12 sont distribuées de manière uniforme autour du manchon 20 et arrivent très près de l'extrémité avant 21 du manchon 20. Qui plus est, elles sont complètement couvertes par l'anneau de fixation 40 quand il est en position de butée. Par ailleurs, le raccord arrière 50 est réalisé en deux éléments principaux qui sont chacun d'un seul tenant. En outre, le manchon 20 comprend une couronne entière de dents 22. The rear connector 50 of the invention is more efficient than the known rear connectors, above all allowing a reliable connection 100 to be made between an armored harness 16 comprising shielded cables and a connector 80. The ends of the shields 14 of the cables 12 are uniformly distributed around the sleeve 20 and arrive very close to the front end 21 of the sleeve 20. Furthermore, they are completely covered by the fixing ring 40 when it is in the stop position. Furthermore, the rear connector 50 is made of two main elements which are each in one piece. In addition, the sleeve 20 comprises an entire crown of teeth 22.
Les reprises de surblindage 17 et des terminaisons des blindages 14 sur le manchon 20 évitent que les efforts ne s'appliquent directement sur les parties conductrices 13 enfichées dans le connecteur 80. La distribution ainsi que le positionnement des terminaisons des blindages 14 sur le raccord arrière 50 assurent une meilleure continuité électrique et une impédance de transfert réduite. N'ayant que deux éléments principaux, le raccord arrière 50 est plus facile à installer sur un harnais 16, et moins susceptible d'être perdu. De surcroît, le raccordement du surblindage 17 et des blindages 14 (au connecteur) est assuré par une seule pièce conductrice, présentant une bien meilleure continuité électrique qu'un manchon en plusieurs pièces. Il en résulte que le raccord arrière 50 est plus performant en termes de CEM. The overlays of the shield 17 and of the ends of the shields 14 on the sleeve 20 prevent the forces from being applied directly to the conductive parts 13 plugged into the connector 80. The distribution as well as the positioning of the ends of the shields 14 on the rear connector 50 ensure better continuity electrical and reduced transfer impedance. Having only two main elements, the rear connector 50 is easier to install on a harness 16, and less likely to be lost. In addition, the connection of the shield 17 and the shields 14 (to the connector) is provided by a single conductive part, having much better electrical continuity than a sleeve made of several parts. As a result, the rear connector 50 is more efficient in terms of EMC.
L'invention a été exposée en relation avec un harnais surblindé comportant des câbles blindés. Toutefois elle est aussi appropriée pour d'autres câbles, par exemple un harnais non surblindé avec des câbles blindés, ou même un seul câble blindé. The invention has been described in connection with an over-armored harness comprising shielded cables. However, it is also suitable for other cables, for example an unshielded harness with shielded cables, or even a single shielded cable.
Bien entendu, l'invention peut être utilisée en même temps que d'autres moyens connus de protection contre les perturbations EM. Egalement, le raccord arrière de l'invention peut être rétro-adapté (ou « retrofitted » en anglais) aux connexions déjà existantes dans l'avion. Of course, the invention can be used at the same time as other known means of protection against EM disturbances. Also, the rear connector of the invention can be retro-adapted (or “retrofitted” in English) to the connections already existing on the aircraft.
Dans une variante, la section intermédiaire peut être une bride perpendiculaire à l'axe et intégrer, le cas échéant, l'épaule externe du manchon. Alternatively, the intermediate section can be a flange perpendicular to the axis and integrate, if necessary, the outer shoulder of the sleeve.

Claims

REVENDICATIONS
1. Raccord arrière (50) pour raccorder un harnais surblindé (16) comportant des câbles blindés (12) à un connecteur (80), le raccord arrière (50) comprenant un manchon (20) et un anneau de fixation (40), 1. rear connector (50) for connecting an armored harness (16) comprising shielded cables (12) to a connector (80), the rear connector (50) comprising a sleeve (20) and a fixing ring (40),
le manchon (20) ayant une paroi (25) de forme sensiblement tubulaire définissant un passage interne (27) adapté à recevoir des câbles blindés (12), the sleeve (20) having a wall (25) of substantially tubular shape defining an internal passage (27) adapted to receive shielded cables (12),
la paroi (25) du manchon (20) comprenant, depuis son extrémité avant (21) vers son extrémité arrière (29), une zone d'enclenchement (22) adaptée pour engager sur un connecteur (80), des trous traversants (24) répartis de manière circonférentielle et adaptés à recevoir les terminaisons des blindages (14) des câbles depuis le passage interne (27), une première plage externe (26) adaptée à recevoir les terminaisons des blindages (14), une épaule externe (28), et une deuxième plage externe (36) adaptée à recevoir le surblindage (17) du harnais, the wall (25) of the sleeve (20) comprising, from its front end (21) towards its rear end (29), an engagement zone (22) adapted to engage through a connector (80), through holes (24 ) distributed circumferentially and adapted to receive the terminations of the shields (14) of the cables from the internal passage (27), a first external pad (26) adapted to receive the terminations of the shields (14), an external shoulder (28) , and a second external area (36) adapted to receive the over-armoring (17) of the harness,
l'anneau de fixation (40) ayant une paroi (45) de forme sensiblement tubulaire définissant un passage annulaire (47) adapté à recevoir le manchon (20), la paroi (45) de l'anneau de fixation (40) comprenant, depuis son extrémité avant (41) vers son extrémité arrière (49), une zone de fixation (43) adaptée pour le raccordement à un connecteur (80), une première plage interne (46), et une épaule interne (48), the fixing ring (40) having a wall (45) of substantially tubular shape defining an annular passage (47) adapted to receive the sleeve (20), the wall (45) of the fixing ring (40) comprising, from its front end (41) towards its rear end (49), a fixing zone (43) adapted for connection to a connector (80), a first internal pad (46), and an internal shoulder (48),
le raccord arrière (50) étant agencé de sorte que l'anneau de fixation (40) puisse glisser au-dessus du manchon (20) dans un sens allant de l'extrémité arrière (29) vers l'extrémité avant (21) du manchon (20), jusqu'à une position en butée où l'épaule interne (48) de l'anneau de fixation (40) vient en butée avec l'épaule externe (28) du manchon (20), the rear connector (50) being arranged so that the fixing ring (40) can slide over the sleeve (20) in a direction from the rear end (29) towards the front end (21) of the sleeve (20), up to a stop position where the internal shoulder (48) of the fixing ring (40) abuts with the external shoulder (28) of the sleeve (20),
caractérisé en ce que dans la position en butée, la plage interne (46) de l'anneau de fixation (40) couvre la première plage externe (26) du manchon (20), l'anneau de fixation (40) étant ainsi agencé pour couvrir les terminaisons des blindages (14), characterized in that in the abutment position, the internal area (46) of the fixing ring (40) covers the first external area (26) of the sleeve (20), the fixing ring (40) thus being arranged to cover the ends of the shields (14),
et en ce que la zone d'enclenchement (22) du manchon (20) est une couronne entière de dents adaptée pour s'engager sur le connecteur (80). and in that the engagement zone (22) of the sleeve (20) is an entire crown of teeth adapted to engage on the connector (80).
2. Raccord arrière (50) selon la revendication 1, caractérisé en ce que la paroi du manchon (20) comporte à l'extrémité avant une partie évasée sur laquelle est formé la zone d'enclenchement (22) et les trous traversants (24). 2. rear connection (50) according to claim 1, characterized in that the wall of the sleeve (20) comprises at the front end a flared part on which is formed the interlocking zone (22) and the through holes (24 ).
3. Raccord arrière (50) selon la revendication 1 ou 2, caractérisé en ce que les trous traversants (24) sont situés immédiatement derrière la zone d'enclenchement (22), sur une partie de la paroi jusqu'à 20% de la longueur du manchon (20) depuis son extrémité avant. 3. rear connection (50) according to claim 1 or 2, characterized in that the through holes (24) are located immediately behind the engagement zone (22), on a part of the wall up to 20% of the length of the sleeve (20) from its front end.
4. Raccord arrière (50) selon l'une quelconque des revendications précédentes, caractérisé en ce que la première plage externe (26) du manchon (20) présente un diamètre externe plus large que celui de la deuxième plage externe (36). 4. Rear connection (50) according to any one of the preceding claims, characterized in that the first external area (26) of the sleeve (20) has a larger external diameter than that of the second external area (36).
5. Raccord arrière (50) selon la revendication 4, caractérisé en ce que la paroi du manchon (20) comprend une section intermédiaire évasée (32) entre la première plage externe (26) et la deuxième plage externe (36). 5. Rear connection (50) according to claim 4, characterized in that the wall of the sleeve (20) comprises a flared intermediate section (32) between the first external surface (26) and the second external surface (36).
6. Raccord arrière (50) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'épaule externe (28) du manchon (20) et l'épaule interne (48) de l'anneau de fixation (40) sont en forme de bague. 6. Rear connection (50) according to any one of the preceding claims, characterized in that the external shoulder (28) of the sleeve (20) and the internal shoulder (48) of the fixing ring (40) are in the shape of a ring.
7. Raccord arrière (50) selon l'une quelconque des revendications précédentes, caractérisé en ce que le manchon (20) est d'un seul tenant. 7. Rear connector (50) according to any one of the preceding claims, characterized in that the sleeve (20) is in one piece.
8. Raccord arrière (50) selon l'une quelconque des revendications précédentes, caractérisé en ce que le raccord arrière (50) comprend au moins un collier de serrage (33) adapté pour sécuriser les terminaisons des blindage (14) en les serrant autour du manchon (20). 8. Rear connection (50) according to any one of the preceding claims, characterized in that the rear connection (50) comprises at least one clamp (33) adapted to secure the ends of the shields (14) by tightening them around of the sleeve (20).
9. Harnais à blindage terminé (70) comprenant un raccord arrière (50) selon l'une quelconque de revendications précédentes ainsi qu'un harnais surblindé (16) comportant des câbles blindés (12), les câbles blindés (12) étant reçus par le passage interne (27) du manchon (20), les terminaisons des blindages (14) des câbles passant vers l'extérieur du manchon (20) par des trous traversants (24) et reçus sur la première plage externe (26) du manchon (20) tandis que le surblindage (16) est reçu sur la deuxième plage externe (36) du manchon (20), et l'anneau de fixation (40) étant monté mobile pour glisser au-dessus du manchon (20) . 9. Finished armor harness (70) comprising a rear connector (50) according to any one of the preceding claims as well as an armored harness (16) comprising shielded cables (12), the shielded cables (12) being received by the internal passage (27) of the sleeve (20), the ends of the shields (14) of the cables passing towards the outside of the sleeve (20) by through holes (24) and received on the first external surface (26) of the sleeve (20) while the over-armor (16) is received on the second external surface (36) of the sleeve (20), and the fixing ring ( 40) being mounted so that it can slide over the sleeve (20).
10. Une connexion (100) entre un harnais à blindage terminé (70) selon la revendication 9 et un connecteur (80), les câbles (12) étant connectés électriquement aux connecteur (80), la zone d'enclenchement (22) du manchon (20) étant engagée sur une zone d'enclenchement (82) du connecteur (80), et l'anneau de fixation (40) étant raccordé à une zone de fixation (83) du connecteur (80), le manchon (20) et l'anneau de fixation (40) du raccord arrière (50) étant dans une position en butée. 10. A connection (100) between a finished shielded harness (70) according to claim 9 and a connector (80), the cables (12) being electrically connected to the connector (80), the engagement zone (22) of the sleeve (20) being engaged on an engagement zone (82) of the connector (80), and the fixing ring (40) being connected to a fixing zone (83) of the connector (80), the sleeve (20 ) and the fixing ring (40) of the rear connector (50) being in a stop position.
EP19845587.5A 2018-12-17 2019-12-13 Rear connection with electromagnetic protection Active EP3878061B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1873100A FR3090223B1 (en) 2018-12-17 2018-12-17 REAR CONNECTION WITH ELECTROMAGNETIC PROTECTION
PCT/FR2019/053060 WO2020128254A1 (en) 2018-12-17 2019-12-13 Rear connection with electromagnetic protection

Publications (2)

Publication Number Publication Date
EP3878061A1 true EP3878061A1 (en) 2021-09-15
EP3878061B1 EP3878061B1 (en) 2022-10-26

Family

ID=66641051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19845587.5A Active EP3878061B1 (en) 2018-12-17 2019-12-13 Rear connection with electromagnetic protection

Country Status (5)

Country Link
US (1) US11721941B2 (en)
EP (1) EP3878061B1 (en)
CN (1) CN113243062B (en)
FR (1) FR3090223B1 (en)
WO (1) WO2020128254A1 (en)

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Also Published As

Publication number Publication date
US20220052493A1 (en) 2022-02-17
WO2020128254A1 (en) 2020-06-25
EP3878061B1 (en) 2022-10-26
US11721941B2 (en) 2023-08-08
FR3090223B1 (en) 2020-12-11
FR3090223A1 (en) 2020-06-19
CN113243062A (en) 2021-08-10
CN113243062B (en) 2023-01-03

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