EP0717420A1 - Herstellungsverfahren einer Abschirmungsmantel auf einem elektrische Leiterbündel, und so erhaltener Bündel - Google Patents

Herstellungsverfahren einer Abschirmungsmantel auf einem elektrische Leiterbündel, und so erhaltener Bündel Download PDF

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Publication number
EP0717420A1
EP0717420A1 EP95402611A EP95402611A EP0717420A1 EP 0717420 A1 EP0717420 A1 EP 0717420A1 EP 95402611 A EP95402611 A EP 95402611A EP 95402611 A EP95402611 A EP 95402611A EP 0717420 A1 EP0717420 A1 EP 0717420A1
Authority
EP
European Patent Office
Prior art keywords
sheath
branch
branches
elements
bundle
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
EP95402611A
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English (en)
French (fr)
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EP0717420B1 (de
Inventor
Thierry Jean-Pierre Renaud
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.)
Airbus Helicopters SAS
Original Assignee
Eurocopter France SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eurocopter France SA filed Critical Eurocopter France SA
Publication of EP0717420A1 publication Critical patent/EP0717420A1/de
Application granted granted Critical
Publication of EP0717420B1 publication Critical patent/EP0717420B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/0045—Cable-harnesses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H01B13/2606—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by braiding
    • 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
    • Y10T29/49194—Assembling elongated conductors, e.g., splicing, etc.
    • Y10T29/49201—Assembling elongated conductors, e.g., splicing, etc. with overlapping orienting
    • 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
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/532—Conductor
    • Y10T29/53243—Multiple, independent conductors

Definitions

  • the present invention relates to bundles of electrical conductors, in particular those called harnesses, which are hardened, that is to say shielded against electromagnetic disturbances, and which are intended to electrically connect the various devices of a complex electrical installation , the proper functioning of which must be ensured, even in the event of electromagnetic interference.
  • harnesses are, for example, used on board aircraft, ships, tanks, etc.
  • the present invention relates to a method for producing such an armored harness or harness, as well as the beam obtained by the implementation of said method.
  • harnesses consist of a bundle of conductors, stranded or not, distributed in several sub-bundles or branches, from branch nodes arranged along said bundle and connectors arranged at the free ends of said branches.
  • said harnesses are coated with braided metallic sheath elements completely covering said conductors.
  • such metal sheath elements can be produced beforehand in the form of braid portions, then threaded onto said harness branches and finally electrically connected to each other by sleeves, for example heat shrinkable, at said knots. branch line, to ensure mechanical and electrical continuity of said metal sheath.
  • each metal sheath element can be braided directly on each of said branches of the harness and include an extension on another branch serving to ensure the electrical continuity of sheath. For the latter purpose, it is also possible to provide overstressing at the branching nodes.
  • the first of the known methods mentioned above leads to the production of shielding sheaths whose electromagnetic performance is relatively low and whose mechanical resistance, in particular to vibration, is insufficient (which moreover further reduces the electromagnetic performance).
  • the second method (braiding directly on the branches of the bundle) allows excellent electromagnetic performance and mechanical resistance.
  • the ends of the metal strands constituting the braided sheath element straighten orthogonally to the branch carrying said element, so that the insulator of the electrical conductors objects and / or objects coming into contact with said element are perforated and / or damaged by said straightened ends.
  • this second method often requires, so that the braided sheath elements provide sufficient protection, that said branches each carry two such elements, which increases the mass and costs.
  • the object of the present invention is to remedy these drawbacks by avoiding the straightened ends of the weaving strands and by ensuring the best compromise between costs, mass and electromagnetic performance.
  • said rings prevent the ends of the metallic braiding strands from straightening inward and / or outward and injuring objects in contact with them.
  • they make it possible, as will emerge from the description below, to achieve excellent electromagnetic protection, with a single braiding layer on the branches of the bundle.
  • said rings are made of an electrically conductive material, they are flexible and adhesive.
  • the adhesive of said rings is also electrically conductive.
  • these rings can be portions of a thin metallic strip, for example made of copper.
  • said rings participate strongly in the cohesion of the bundle and its shielding sheath, as well as in the electrical and mechanical continuity between the various sheath elements.
  • the bundles of electrical conductors generally comprise nodes each uniting three branches of said bundle.
  • three sheath elements are formed, each of which passes from one of the three branches to one of the other two while being laterally crossed by the other of said two other branches, at least one end of said elements being trapped between said first and second rings, and the pair of branches carrying each of said three sheath elements is different from the pairs of branches carrying the other two sheath elements.
  • said first, second and third sheath elements may cover, respectively, all of said branch having the smallest section, all of said branch having the intermediate section and all of said branch having the largest section and, partially, near said node, said branch having the largest section, said branch having the smallest section and said branch having the intermediate section.
  • one of said sheath elements prefferably start on a branch, in the vicinity of said node, and ends, on another branch, also in the vicinity of said node.
  • an electrical connector is mounted at the free end of a branch of the bundle carrying a metal sheath element
  • the production of said sheath elements is preferably carried out from the branches the finest to the largest branches.
  • the present invention also relates to a bundle of multi-branch electrical conductors coated with a metallic sheath of electromagnetic shielding, formed by sheath elements braided directly on the branches of said bundle, from metallic strands.
  • a metallic sheath of electromagnetic shielding formed by sheath elements braided directly on the branches of said bundle, from metallic strands.
  • at least one of the ends of said sheath elements is trapped between two superimposed rings, enclosing the corresponding branch of said bundle.
  • said bundle is remarkable in that, on the side of a connector, the corresponding sheath element comprises a vacuum braiding tail, which is folded over the portion of sheath surrounding the tip of said connector through which the corresponding branch enters the connector and which is clamped against said tip.
  • Figure 1 shows a portion of a bundle of electrical conductors, in the vicinity of a node connecting three branches.
  • Figure 2 shows, in cross section and on a larger scale than Figure 1, a bundle of electrical conductors, provided with a metal sheath of electromagnetic shielding.
  • FIGS. 3A to 3J schematically illustrate different stages of an example of implementation of the process for producing braided sheath elements at the node of FIG. 1, in accordance with the present invention.
  • FIGS. 4A to 4H illustrate an alternative embodiment of the braided sheath elements.
  • FIG. 5 illustrates the fixing of a sheath element in the vicinity of a connector.
  • FIG. 6 illustrates an exemplary implementation of the present invention for shielding a harness of conductors by the production of protective sheath elements, in accordance with the present invention.
  • FIG. 7 shows another example of harness capable of being shielded in accordance with the invention.
  • FIG. 1 there is shown a portion of a bundle F of electrical conductors C, stranded or not, in the vicinity of a node N connecting three branches B1, B2 and B3 of said bundle F.
  • each branch of the latter is surrounded by an element EG of braided metallic sheath G protecting the corresponding conductors C, against disturbances electromagnetic external.
  • each sheath element EG is produced by direct braiding on the corresponding branch of the bundle F, for example by means of a braiding loom.
  • the production of the sheath elements EG in accordance with the present invention is carried out branch after branch, with partial overlapping of another branch, in order to ensure a satisfactory covering of all N nodes.
  • first ring b1 enclosing the branch of larger section B3 in the vicinity of the node N, at the location provided for the beginning end of a sheath element EG1 (see below).
  • This first ring b1 can consist of a portion of electrically conductive metallic tape, for example of copper.
  • this conductive tape is adhesive, with conductive glue or not, so as to be able to easily adhere to the branch B3 by perfectly matching the periphery of the latter.
  • the tape must ensure that any straightened ends of the sheath element EG1 cannot injure the conductors C of the harness F.
  • the bundle F is put in place in the braiding loom and there is then produced, starting approximately from the middle of the first ring b1 and in the direction of the node N, the sheath element EG1 which comprises a part P1 covering the branch B3 in the vicinity of the node N and which completely covers the branch B1.
  • This sheath element EG1 is produced so that the branch B2 crosses it laterally, at its connection to the node N.
  • the braiding parameters (number of braided strands, number of coils distributing said strands and no braiding) are adjusted for that said sheath element EG1 and its part P1 cover, without gaps and without overlaps, respectively the entire branch B1 and partially the branch B3. Since it is assumed that the branch B1 has a smaller section than the branch B3, it is seen that it is necessary that the braiding pitch on the branch B3 (part P1) is smaller than on the branch B1.
  • a third ring b3 (similar to the previous ones) is placed, enclosing the sheath element EG1 on the branch B1 in the vicinity of the node N, at the location provided for the beginning end of a EG2 sheath (see below).
  • the ring b3 must ensure that the braiding strands of this sheath element EG2 cannot damage the sheath element EG1 and / or the underlying conductors C.
  • the braiding of the bundle element F is continued by making, starting approximately from the middle of the third ring b3 and in the direction of node N, the sheath element EG2, which includes a part P2 covering the sheath element EG1 (that is to say the branch B1) in the vicinity of said node N and which completely covers the branch B2.
  • the branch B3, partially covered with the braiding part P1 laterally crosses the sheath element EG2, at its connection to the node N.
  • the braiding pitch of the element EG2 is larger on the branch B1 than on the branch B2.
  • the starting end of the sheath element EG2 is blocked on the third ring b3, by a fourth ring b4, which encloses the corresponding end of said sheath element EG2 and which is superimposed on the third ring b3.
  • the fourth ring b4 can be produced in a similar way to the three preceding rings b1, b2 and b3 and it ensures that the ends of the metal strands, forming the sheath element EG2, cannot be straightened, these ends being trapped between said third and fourth rings b3 and b4.
  • a fifth ring b5 (similar to the previous ones) is placed, enclosing the sheath element EG2 on the branch B2 in the vicinity of the node N, at the location provided for the start end of an EG3 sheath element (see below).
  • the ring b5 must ensure that the braiding strands of this sheath element EG3 cannot damage the sheath element EG2 and / or the underlying conductors C.
  • the sheath element EG3 which has a part P3 covering the sheath element EG2 (branch B2) in the vicinity of said node and which completely covers branch B3.
  • the branch B1 covered with the sheath element EG1 and the braiding part P2, laterally crosses the sheath element EG3, at its connection to the node N.
  • the braiding pitch on the branch B2 is greater than on branch B3.
  • the EG3 sheath element covers the first and second rings b1 and b2 of the EG1 sheath element and locks them in position.
  • the starting end of the sheath element EG3 is locked on the fifth ring b5, by a sixth ring b6, which encloses the corresponding end of said sheath element EG3 and which is superimposed to the fifth ring b5.
  • the sixth ring b6 can be produced in a similar manner to the previous five rings b1 to b5 and it ensures that the ends of the metal strands, forming the sheath element EG3, cannot be straightened, these ends being trapped between said fifth and sixth rings b5 and b6.
  • FIGS. 3A to 3J is only one example of braiding among others, which takes into account the differences in section of the branches B1, B2 and B3.
  • rings b1 to b6 made of adhesive conductive tape with conductive glue, is advantageous, since such rings improve electrical continuity and participate in the cohesion of the sheath elements EG1, EG2, EG3 between them.
  • FIG. 5 there is shown the end L of a braided metallic sheath element EG (which can be any one of the elements EG1, EG2, EG3, EG5 or EG6), opposite the node N and it has been assumed that this end L was connected by external fitting on the end piece EB of a connector CN.
  • the branch of the harness F which carries the sheath element EG, penetrates inside the connector CN, through the said end piece EB.
  • the braiding of the sheath element can start with the tail Q and end by imprisonment between said first and second rings (b1, b2; b3, b4; b5, b6; b11, b12), or vice versa start on said rings and terminate with said braiding tail Q.
  • Such a braiding tail is easy to perform when empty, when the bundle F is not in place in the loom to be braided.
  • the harness H shown in FIG. 6, represents a particular case of bundle of conductors F, in which the conductors C form a main trunk, from nodes from which branches are derived.
  • FIG. 6 arrows have been drawn symbolizing the direction of braiding of the various sheath elements: the origin of an arrow marks the start of braiding and the end of an arrow indicates the braided branch and the end point of braiding.
  • the thickness of the lines of the branches of the harness symbolizes the sections of the different branches.
  • the metal sheath is formed on the harness H of FIG. 6 by progressing from the branches of smaller sections towards the branches of larger sections, by implementing the features illustrated by FIGS. 3A to 3J or 4A to 4H, According to the case.
  • sheath element EG11 which begins on the branch B31 (which corresponds to the branch B22 of the node N2) and ends on the terminal branch B11 of smaller section. Then, the sheath element EG21 is produced, which begins on the branch B11 and ends on the branch B21, of section greater than the branch B11 but less than the branch B31.
  • the sheath element EG12 which covers the branch B12 is then produced. and begins on branch B32 (which corresponds to branch B23 of node 3). This optimizes the braiding time and the use of the braiding loom, subsequently producing the sheath elements having the same weaving parameters.
  • the sheath element EG31 is then produced by making it start on the branch B21, cover the entire branch B31 (B22) and stop on the branch B12.
  • the two branches B15 and B25 are assumed to have the same section. We can then make a short sheath element EG5 starting from B14 (B35) near the node N5 and stopping on the branch B15, near N5. The branches of identical section B15 and B25 are then covered by a single sheath element EG15 (EG25), which begins at the end of the branch B15 and stops at the end of the branch B25.
  • FIG. 7 represents a harness H ′ comprising several branches connecting different equipment (not shown) and having variable sections, but having no main axis serving the different directions.
  • harness H 'of FIG. 7 can be coated with a braided protective sheath, just like the harness H of FIG. 6.
  • shielding sheaths for harnesses are easily produced, while benefiting from an excellent compromise between cost, mass and electromagnetic performance.
  • these sheaths have only one layer of braiding.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
EP95402611A 1994-12-13 1995-11-21 Herstellungsverfahren eines Abschirmungsmantels auf einem elektrischen Leiterbündel, und so erhaltener Bündel Expired - Lifetime EP0717420B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414969 1994-12-13
FR9414969A FR2728114A1 (fr) 1994-12-13 1994-12-13 Procede pour la realisation d'une gaine de blindage sur un faisceau de conducteurs electriques et faisceau ainsi obtenu

Publications (2)

Publication Number Publication Date
EP0717420A1 true EP0717420A1 (de) 1996-06-19
EP0717420B1 EP0717420B1 (de) 1999-06-16

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ID=9469745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95402611A Expired - Lifetime EP0717420B1 (de) 1994-12-13 1995-11-21 Herstellungsverfahren eines Abschirmungsmantels auf einem elektrischen Leiterbündel, und so erhaltener Bündel

Country Status (4)

Country Link
US (2) US5718041A (de)
EP (1) EP0717420B1 (de)
DE (1) DE69510312T2 (de)
FR (1) FR2728114A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104751990A (zh) * 2015-03-18 2015-07-01 芜湖航天特种电缆厂 分支电缆

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6462268B1 (en) 1998-08-06 2002-10-08 Krone, Inc. Cable with twisting filler and shared sheath
JP3786594B2 (ja) * 2001-10-01 2006-06-14 矢崎総業株式会社 電磁波シールド編組
CA2496520C (en) * 2002-08-28 2012-01-17 Federal-Mogul Powertrain, Inc. Cable guide sleeving structure
US7550666B2 (en) * 2005-11-29 2009-06-23 Icore International Limited Electrical-cable shielding
FR2901423B1 (fr) * 2006-05-19 2010-11-26 Hispano Suiza Sa Harnais electrique blinde,en particulier pour moteur d'avion
ATE471582T1 (de) * 2007-02-12 2010-07-15 Alcatel Lucent Verfahren zur kontaktierung eines elektrischen leiters und flexibles element zur herstellung eines elektrischen kontaktes
US9276392B2 (en) * 2010-01-25 2016-03-01 Apple Inc. Compression molded cable structures and methods for making the same
US9936617B2 (en) * 2015-03-24 2018-04-03 Yazaki North America, Inc. Electromagnetic interference splice shield
EP3937321B1 (de) * 2020-07-06 2024-03-27 Niedax GmbH & Co. KG Kanalelement, kanal und verfahren zum installieren eines kabels
DE102021118814A1 (de) 2021-07-21 2023-01-26 Lisa Dräxlmaier GmbH Verfahren zum entflechten eines elektrischen leitungssatzes

Citations (2)

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EP0554158A1 (de) * 1992-01-29 1993-08-04 FILOTEX S.A. dite Mehrzweigige abgeschirmte Verbindung
EP0554159A1 (de) * 1992-01-29 1993-08-04 FILOTEX S.A. dite Abgeschirmte Fischgratverbindung

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FR2566224B1 (fr) * 1984-06-14 1986-09-26 Snecma Dispositif de blindage electromagnetique de cablage electrique constitue de faisceaux de cables comportant des derivations
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Publication number Priority date Publication date Assignee Title
EP0554158A1 (de) * 1992-01-29 1993-08-04 FILOTEX S.A. dite Mehrzweigige abgeschirmte Verbindung
EP0554159A1 (de) * 1992-01-29 1993-08-04 FILOTEX S.A. dite Abgeschirmte Fischgratverbindung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104751990A (zh) * 2015-03-18 2015-07-01 芜湖航天特种电缆厂 分支电缆

Also Published As

Publication number Publication date
FR2728114A1 (fr) 1996-06-14
DE69510312T2 (de) 1999-11-18
US5718041A (en) 1998-02-17
EP0717420B1 (de) 1999-06-16
US6066800A (en) 2000-05-23
FR2728114B1 (de) 1997-02-14
DE69510312D1 (de) 1999-07-22

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