Interface for fastening a bundle of electric cables mounted in a tube, which is configured to provide the interface between said tube and a tube fastening member

Abstract

Interface (10) for fastening at least one electric cable, comprising a main body (12) extending along a first elevation axis (X1-X1') and circumferentially delimited by first and second end portions (13, 15) each comprising a free end (13a, 15a), the free ends (13a, 15a) of the first and second end portions (13, 15) being angularly offset with respect to each other so as to define an overlap zone (Z) of the first and second end portions (13, 15). Said first and second end portions (13, 15) are elastically deformable and radially movable between an initial position, in which they are radially spaced apart from each other by a radial clearance at the overlap zone (Z), and a mounted position, in which they are in radial contact with each other at least over a portion of the overlap zone (Z).

Description

[0001] DESCRIPTION

[0002] TITLE: Interface for fixing an electrical cable harness mounted in a tube configured to provide the interface between said tube and a tube fixing member

[0003] Technical field of the invention

[0004] The present invention relates to the field of fixing electrical components and in particular the mounting and fixing of one or more cables, wires and / or electrical cable bundles on a fixing support or lyre.

[0005] More particularly, the invention relates to interfaces for fixing electrical cable bundles on a fixing support or lyre.

[0006] The present invention finds a preferred use in industrial fields which require great control of positioning and retention while reducing the weight and size of the on-board components. Among these industrial fields, we can cite, in a non-limiting manner, aeronautics, automobiles or railways.

[0007] The invention is of particularly advantageous application for aeronautical electrical components intended for use in harsh environments, in particular extreme temperatures, dimensional constraints, etc.

[0008] State of the prior art

[0009] Climate change is a major concern for many legislative and regulatory bodies around the world. Indeed, various restrictions on carbon emissions have been, are being, or will be adopted by various states. Particularly in the aviation sector, an ambitious standard applies both to new types of aircraft and those currently in operation, requiring the implementation of technological solutions to make them compliant with current regulations. Civil aviation has been mobilizing for several years now to make a contribution to the fight against climate change.

[0010] Technological research efforts have already led to very significant improvements in the environmental performance of aircraft. Reducing the climate impact of aircraft requires the use of methods and the exploitation of virtuous development and manufacturing processes that minimize greenhouse gas emissions to the minimum possible, in order to reduce the environmental footprint of their activity.

[0011] This sustained research and development work focuses on new generations of aircraft engines, the weight reduction of aircraft, particularly through the materials used and lighter on-board equipment, the development of the use of electrical technologies, and finally aeronautical biofuels.

[0012] With respect to electrical components used in aircraft electrification, electrical cable bundles or electrical harnesses are generally mounted in a tube fixed to a mounting bracket or lyre by means of a generally cylindrical mounting interface.

[0013] The fixing interface provides a mechanical connection between the electrical cable harnesses and the fixing bracket, so as to prevent damage to the cables and to keep them in a predefined orientation.

[0014] The fixing interface is usually made of heat-shrinkable elastomer material and is assembled onto the tube during harness manufacturing. Such fixing interfaces cannot be subsequently assembled onto the tube containing the electrical cable harness. This is particularly disadvantageous in the event of damage to a fixing interface requiring its replacement.

[0015] The assembly of such fixing interfaces requires the use of a hot air gun to shape them onto the tube, which complicates their implementation and increases the assembly time.

[0016] Furthermore, the outer diameter of such interfaces is dependent on the diameter of the tube surrounding the electrical cable bundle and the shaping or shrinking coefficient.

[0017] Cable fixing systems are also known comprising a body delimiting a cylindrical passage for the passage of a cable, the body radially surrounding said cable in a mounted position.

[0018] Reference may be made in particular to document FR-A 1-3 089 592 which describes a system for fixing a cable comprising a body in the form of a strap closed on itself in an initial rest position. The body delimits a cylindrical passage for the passage of the cable and comprises clamping means configured to reduce the circumference of said passage and to maintain the body in a position mounted around the cable. The body further comprises a fixing finger cooperating with a hole provided on a support.

[0019] However, such a solution is complex and requires manual adjustment of the circumference of the cable passage, which increases the time required to install the fastening system on the cable.

[0020] Furthermore, the fastening system is assembled on the cable during the manufacture of the harness and cannot be assembled on the cable later.

[0021] There is a need to improve the interfaces for fixing electrical cable harnesses to a fixing support, for example by clipping such as a lyre or by clamping such as a collar.

[0022] Statement of the invention

[0023] The present invention therefore aims to overcome the drawbacks of the aforementioned electrical cable harness fixing interfaces.

[0024] The objective of the invention is to simplify the implementation of the interfaces for fixing electrical cable harnesses while allowing them to be installed on the tube in the first assembly but also subsequently.

[0025] The invention also aims to provide a fixing interface capable of adapting to different diameters of electrical cable bundle tubes.

[0026] The invention relates to an interface for fixing at least one electrical cable or a bundle of electrical cables or harnesses mounted in a strand or tube. Said interface is configured to ensure the mechanical connection between said tube and a tube fixing member by clipping or lyre or other fixing means of the collar type.

[0027] Said fixing interface comprises a main body extending along a first elevation axis and intended to surround the tube in a mounted position.

[0028] The main body is circumferentially delimited by first and second end portions or lips each comprising a free end.

[0029] The free ends of the first and second end portions are angularly offset from each other so as to define an overlapping area of ​​the first and second end portions.

[0030] By "overlap zone" is meant an angular segment of the fixing interface in which the first and second parts are arranged one above the other.

[0031] The first and second end portions of the fixing interface are elastically deformable and radially movable between an initial, rest position, i.e. not mounted on the strand, in which said first and a second end portions are radially spaced from each other by a radial clearance at the level of the overlap zone and a mounted position in which said first and a second end portions are in radial contact with each other at least over a part of the overlap zone.

[0032] In other words, the fixing interface comprises two end portions or lips which overlap in the mounted position on the tube, thereby ensuring circumferential coverage of the tube over its entire circumference, i.e. 360°, in the mounted position.

[0033] Thanks to the fixing interface, the implementation on the tube carried out by radial spacing of the two end parts is simplified.

[0034] In addition, the installation of the fixing interface does not require any tools and saves time during its installation.

[0035] By "elastically deformable" is meant any organ, by its shape and / or its material, capable of deforming under the action of an external stress and of returning to its initial shape when said external stress stops.

[0036] Furthermore, it is possible to mount such a fixing interface on a tube at any stage of use of the tube.

[0037] Finally, such a fixing interface is capable of adapting to different tube diameters. For example, such a fixing interface covers a diameter range between 1 and 21% of its inner diameter.

[0038] Advantageously, the main body has a general spiral shape.

[0039] By "spiral" we mean a plane curve describing revolutions around an axis or a fixed point, here the first axis of elevation, moving further and further away from it.

[0040] In other words, the spiral is formed by a series of convolutions or windings around the first axis of elevation.

[0041] Thanks to the spiral shape of the fixing interface, the retention of the interface in position on the strand once installed is improved. In fact, the shape memory of the fixing interface, particularly of the elastomer, helps the fixing interface to remain in position on the tube.

[0042] Furthermore, the spiral shape of the body gives the fixing interface elastic properties.

[0043] For example, the main body is radially delimited by an internal surface and an external surface and axially by two shoulders at each of its ends.

[0044] A "shoulder" means a sudden change in diameter of a cylindrical part.

[0045] The shoulders here make it possible to block said fixing interface in translation in a fixing member, and also to stiffen the fixing interface.

[0046] Alternatively, it could be provided that the fixing interface is devoid of shoulders at its ends.

[0047] The fixing interface is advantageously single-piece.

[0048] For example, the fixing interface is made of polymer material.

[0049] For example, the fixing interface is made by casting or machining.

[0050] For example, the fixing interface is made of elastomer material. The fixing interface is not limited to the use of a polymer material.

[0051] Advantageously, the overlap zone of the first and second end parts extends from a free end of each of the end parts over an angular portion of between 5° and 30°, preferably between 15° and 20°.

[0052] Preferably, one of the first and second end portions comprises, on its inner surface, an internal axial groove and the other of the first and second end portions comprises, on its outer surface, an external axial groove.

[0053] For example, the internal axial groove extends axially at least over a portion of one of the first and second end portions, for example at the shoulders.

[0054] For example, the internal axial groove is circumferentially delimited by a free end of one of the first and second end portions and by a first radial stop.

[0055] For example, the outer axial groove extends axially at least over a portion of the other of the first and second end portions, for example at the shoulders.

[0056] For example, the outer axial groove extends over the entire axial length of the other of the first and second end portions, while leaving a radial step.

[0057] For example, the outer axial groove is circumferentially delimited by a free end of the other of the first and second end portions and by a second radial stop.

[0058] Advantageously, the external axial groove extends over an angular segment greater than or equal to the angular segment over which the internal axial groove extends.

[0059] In the mounted position, the inner surface of the inner groove of one of the end portions is in radial contact with the outer surface of the outer groove of the other end portion.

[0060] The angular extent of the overlap area is, for example, less in the mounted position than the angular extent of the overlap area in the initial position. This depends on the tube diameter.

[0061] Alternatively, it could be provided that the angular extent of the overlap area is the same in the mounted position and in the initial position.

[0062] In this case, either the free end of the other of the end portions is in circumferential contact with the first abutment surface of one of the end portions, or the free end of one of the end portions is in circumferential contact with the second abutment surface of the other of the end portions in the mounted position.

[0063] Generally, the overlap zone extends between the free end of one of the end parts and the radial stop of said end part.

[0064] According to one embodiment, the first end portion is an outer end portion and the second end portion is an inner end portion.

[0065] In the initial position, the second end portion is radially closer to the elevation axis than the first end portion.

[0066] In this embodiment, in the initial position, the first end portion radially at least partially covers the second end portion, while leaving a radial clearance between said end portions.

[0067] In the mounted position on the tube, the end portions are reversed and it is the second end portion which radially at least partially covers the first end portion, said end portions then being in radial contact with each other. In the mounted position, the first end portion is radially closer to the elevation axis than the second end portion.

[0068] According to another variant, in the initial position and in the mounted position, the first end portion is radially closer to the elevation axis than the second end portion. In this mode, there is no inversion of the end portions during assembly on the tube.

[0069] In this embodiment, in the initial position, the second end portion radially at least partially covers the first end portion, while leaving a radial clearance between said end portions. In the mounted position, said end portions are in radial contact with each other.

[0070] In a non-limiting manner, the fixing interface may comprise a position-holding member, such as a ring or clips mounted on the external surface or in a notch made on said external surface of the fixing interface, in the mounted position of said fixing interface on the tube.

[0071] For example, the interface comprises an adhesive, such as glue, disposed in the mounted position at the overlap area between the two end portions.

[0072] According to another aspect, the invention relates to an assembly comprising a tube or strand comprising at least one electric cable and extending along a second elevation axis and a fixing interface as described previously mounted around said tube, the first axis of the fixing interface being coaxial with said second axis of the tube.

[0073] By "tube" or "strand" is meant a cylindrical conduit or tube extending along a second elevation axis and in which a plurality of electrical cables are mounted in the form of a cable bundle or harness. Alternatively, provision could be made for mounting a single electrically conductive cable or wire in the strand.

[0074] According to another aspect, the invention relates to an assembly comprising an assembly as described above and a tube fixing member by clipping or lyre or other fixing means, for example of the collar type, for fixing by clamping, the fixing interface being configured to ensure the mechanical connection between said tube and said tube fixing member.

[0075] By "lyre" we mean any tube fixing device capable of being attached to the tubes by clipping.

[0076] Advantageously, the clip-on tube fixing member comprises a portion for fixing to a mechanical component and two semi-cylindrical flexible portions extending from the fixing portion towards each other and configured to snap into the main body of the fixing interface.

[0077] For example, the lyre is axially delimited by two opposite ends and comprises a portion for attachment to a mechanical component and two semi-cylindrical flexible portions extending from the attachment portion towards each other.

[0078] The two semi-cylindrical portions are elastically deformable and movable between an initial position in which the free ends of said portions are brought together and a holding position in which the free ends of said portions are separated to surround the fixing interface. The elastic properties of the portions make it possible to hold the fixing interface by clipping into the lyre.

[0079] For example, the shoulders of the fixing interface are axially supported against the axial ends of the lyre.

[0080] By "collar" is meant any tube fixing device capable of being fixed to the tubes by clamping.

[0081] According to another aspect, the invention relates to a method of assembling the assembly as described above in which:

[0082] - the fixing interface is positioned close to the tube and the two end portions are elastically spaced circumferentially from each other so as to form a circumferential space between said end portions;

[0083] - the tube is then inserted into the circumferential space of the attachment interface until the tube is located inside said attachment interface and radially against an internal surface of said attachment interface, on a side diametrically opposite the circumferential space; and

[0084] - the two end portions are released so as to elastically approach each other around the tube and come into radial contact with each other and with the tube to form the mounted or assembled position of the interface on the tube.

[0085] During the step of circumferentially separating the two end portions from each other, said two end portions are in an intermediate position between the initial position and the mounted position.

[0086] In the mounted position, the first axis of the fixing interface is coaxial with the second axis of the tube.

[0087] In the assembled position, the fixing interface is advantageously held axially on said tube.

[0088] According to one embodiment, when the two end parts are released, they are reversed relative to their initial position.

[0089] Alternatively, provision could be made for the position of the two end portions not to be reversed from their initial position upon their release into the mounted position.

[0090] Brief Description of the Drawings Other objects, characteristics and advantages of the invention will appear on reading the following description, given solely by way of non-limiting example, and made with reference to the indexed drawings in which:

[0091] [Fig 1] schematically illustrates a perspective view of a strand fixing interface according to an embodiment of the invention, in an initial rest position;

[0092] [Fig 2], [Fig 3], [Fig 4] represent the assembly steps of the fixing interface of figure 1 on a strand;

[0093] [Fig 5] is a perspective view of the attachment interface of Fig. 4 in a mounted position, with the strand omitted for clarity;

[0094] [Fig 5A] is a front view of the attachment interface of Figure 5 in a mounted position, with the strand;

[0095] [Fig 6] is a front view of the attachment interface of Fig. 5 in a mounted position according to another embodiment;

[0096] [Fig 7] represents the fixing interface of figure 1 assembled on a strand and on a first fixing member of the lyre type; and

[0097] [Fig 8] schematically illustrates a perspective view of a strand fixing interface according to another embodiment of the invention, in an initial rest position.

[0098] Detailed description of at least one embodiment

[0099] In the remainder of the description, the terms “axial”, “radial”, “internal” and “external” are defined relative to a first elevation axis X l -X l ' of the fixing interface 10.

[0100] In Figure 1 is shown an interface 10 for fixing a bundle of electrical cables or harnesses mounted in a strand or tube 20 visible in Figures 2 to 4 and 5A. The fixing interface 10 can also be used for fixing one or more cables or wires.

[0101] The fixing interface 10 comprises a main body 12 of generally spiral shape. The fixing interface 10 extends along the first elevation axis X l -X l '.

[0102] By "spiral" we mean a plane curve describing revolutions around an axis or a fixed point, here the first elevation axis X l -X l ', moving away from it radially more and more.

[0103] In other words, the spiral is formed by a series of convolutions or windings around the first elevation axis X l - Xl '.

[0104] The main body 12 of the fixing interface 10 is radially delimited by an internal surface 12a and an external surface 12b and axially by two shoulders 14, 16 at each of its ends 14b, 16b.

[0105] A "shoulder" means a sudden change in diameter of a cylindrical part.

[0106] The shoulders 14, 16 here make it possible to block said fixing interface 10 in translation in a fixing member 30, visible in FIG. 7, and also to stiffen the fixing interface 10.

[0107] The main body 12 of the fixing interface 10 is circumferentially delimited by two end portions or lips 13, 15, namely a first end portion 13 and a second end portion 15, each comprising a free end 13a, 15a.

[0108] As illustrated in FIG. 1, the fixing interface 10 is in an initial, resting position, i.e. not mounted on the strand 20 of cables.

[0109] In this initial position, the second end portion 15, here internal, of the body 12 is radially closer to the first axis X l - Xl ' than the first end portion 13, here external, of the body 12.

[0110] Generally, in this initial position, the free ends 13a, 15a of the corresponding end part 13, 15 are circumferentially offset from each other so as to define an overlap zone Z of the two end parts 13, 15.

[0111] The end portions 13, 15 of the fixing interface 10 are radially movable between an initial, rest position, i.e. not mounted on the cable strand, in which the end portions 13, 15 are radially spaced apart by a radial clearance from each other at the level of the overlap zone Z and a mounted position in which the end portions 13, 15 are in radial contact with each other at least over a part of the overlap zone Z.

[0112] The overlap zone Z of the two end parts 13, 15 extends from one end 13a, 15a of each end part 13, 15 over an angular portion of between 5° and 30°.

[0113] The second end portion 15 comprises, on its internal surface 12a, an internal axial groove 17.

[0114] The internal axial groove 17 may extend axially over the entire axial length of the second end portion 15 or may extend over a portion of said second end portion 15, for example at the shoulders 14, 16.

[0115] The internal axial groove 17 is circumferentially delimited by the second free end 15a of the second end portion 15 and by a first radial stop 17a.

[0116] The first end portion 13 comprises, on its external surface 12b, an external axial groove 18.

[0117] The external axial groove 18 may extend axially over the entire axial length of the first end portion 13 or may extend over a portion of said first end portion, for example at the shoulders 14, 16. In the example illustrated, the external axial groove 18 extends over the entire axial length of the first end portion 13, while leaving a radial step 14a, 16a.

[0118] The external axial groove 18 is circumferentially delimited by the first free end 13a of the first end portion 13 and by a second radial stop 18a.

[0119] The external axial groove 18 extends over an angular segment greater than or equal to the angular segment over which the internal axial groove 17 extends.

[0120] In the initial position, visible in Figure 1, the first end portion 13 radially covers at least partially the second end portion 15, while leaving a radial clearance between said end portions 13, 15.

[0121] According to another variant, visible in Figure 8, in the initial position, the second end portion 15 radially covers at least partially the first end portion 13, while leaving a radial clearance between said end portions 13, 15. Generally, in the initial position, one of the end portions radially covers at least partially the other of the end portions, while leaving a radial clearance between said end portions.

[0122] The spiral shape of the body 12 gives the fixing interface 10 elastic properties.

[0123] Thus, the fixing interface 10 is elastically deformable.

[0124] By "elastically deformable" is meant any organ, by its shape and / or its material, capable of deforming under the action of an external stress and of returning to its initial shape when said external stress stops.

[0125] The attachment interface 10 may be made of a polymer material, for example an elastomer, and may be made by molding a polymer material or by machining. The attachment interface 10 is not limited to the use of a polymer material.

[0126] The fixing interface 10 is a single piece.

[0127] In a non-limiting manner, the fixing interface 10 may comprise a position-holding member (not shown in the figures), such as a ring or clip mounted on the external surface 12b or in a notch made on said external surface 12b of the fixing interface 10, in the mounted position of said fixing interface 10 on the strand 20.

[0128] The steps for assembling the fixing interface 10 on a strand or tube 20 are illustrated in Figures 2 to 4.

[0129] By "strand" is meant a cylindrical conduit or tube extending along a second elevation axis X2-X2' and in which a plurality of electrical cables are mounted in the form of a cable bundle or harness.

[0130] Alternatively, one could provide for the mounting of a single electrically conductive cable or wire in the strand.

[0131] In a first step, visible in Figure 2, the fixing interface 10 is positioned close to the strand 20 and the two end parts 13, 15 are spaced circumferentially from each other so as to form a circumferential space 19 between said end parts 13, 15. The first step corresponds to an intermediate position of the two end parts 13, 15, between the initial position and the mounted position.

[0132] The strand 20 is then inserted into the circumferential space 19 of the fixing interface 10, as illustrated in FIG. 3, until the strand 20 is located inside said fixing interface 10 and against the internal surface 12 of the fixing interface 10, on the side diametrically opposite the circumferential space 19.

[0133] The two end portions 13, 15 are released so as to tend to move closer to each other due to their elastic properties.

[0134] As explained in detail above, in the embodiment illustrated in FIG. 1, in the initial position, the first end portion 13 radially covers at least partially the second end portion 15, while leaving a radial clearance between said end portions 13, 15. When the two end portions 13, 15 are released, the second end portion 15 is positioned radially above the first end portion 13.

[0135] In the mounted position, visible in Figures 4 and 5, the external surface 18b of the external groove 18 of the first end part 13 is in radial contact with the internal surface 17b of the internal groove 17 of the second end part 15.

[0136] The angular extent of the overlap zone Z is, here, less in the mounted position than the angular extent of the overlap zone Z in the initial position. This depends on the diameter of the strand.

[0137] Alternatively, it could be provided that the angular extent of the overlap zone Z is the same in the mounted position and in the initial position. In this case, either the external free end 13a of the first end portion 13 would come into circumferential contact with the first abutment surface 17a of the second end portion 15, or the internal free end 15a of said second end portion 15 would come into circumferential contact with the second abutment surface 18a of the first end portion 13.

[0138] The embodiment illustrated in Figure 6, in which the same elements bear the same references, differs from the previous embodiment only by the addition of an adhesive C, such as for example glue, in the mounted position, at the level of the overlap zone Z between the two end parts 13, 15.

[0139] The embodiment illustrated in Figure 8, in which the same elements bear the same references, differs from the previous embodiment only in that the first end portion 13 is at least partially radially covered by the second end portion 15 in the initial position and in the mounted position. In the initial position, a radial clearance remains between said end portions 13, 15.

[0140] In this case, after insertion of the strand 20 into the circumferential space 19 of the fixing interface 10, as illustrated in FIG. 3, the two end portions 13, 15 are released so as to return to their initial position.

[0141] The mounted position is identical to that illustrated in Figures 4 and 5, in which the outer surface 18b of the outer groove 18 of the first end portion 13 is in radial contact with the inner surface 17b of the inner groove 17 of the second end portion 15.

[0142] In the assembled or mounted position, visible in Figures 4 to 6, the first axis X1-X1' of the fixing interface 10 is coaxial with the second axis X2-X2' of the strand 20 and the fixing interface 10 is held axially on said strand.

[0143] After assembly of the fixing interface 10 on the strand 20, the assembly is mounted on a fixing member by clipping, for example of the lyre type 30 visible in figure 7 or by tightening, for example of the clamp type (not shown).

[0144] By "lyre" we mean any tube fixing device capable of being attached to the tubes by clipping.

[0145] By "collar" is meant any tube fixing device capable of being fixed to the tubes by clamping.

[0146] As illustrated in Figure 7, the lyre 30 is axially delimited by two opposite ends 30a, 30b and comprises a portion 32 for attachment to a mechanical component (not shown) and two semi-cylindrical flexible portions 34, 36 extending from the attachment portion 32 towards each other.

[0147] The two semi-cylindrical portions 34, 36 are elastically deformable and movable between an initial position in which the free ends 34a, 36a of said portions 34, 36 are brought together and a holding position, visible in FIG. 7, in which the free ends 34a, 36a of said portions 34, 36 are separated to surround the fixing interface 10. The elastic properties of the portions 34, 36 make it possible to hold the fixing interface 10 by clipping in the lyre 30.

[0148] The shoulders 14, 16 of the fixing interface 10 bear axially against the axial ends 30a, 30b of the lyre 30.

[0149] Thanks to the spiral shape of the fixing interface 10, the maintenance in position of the interface on the strand once installed is improved. Indeed, the shape memory of the fixing interface 10, in particular of the elastomer, helps the fixing interface 10 to remain in position on the strand 20.

[0150] Generally, the fixing interface 10 comprises two end portions or lips which overlap in the mounted position on the strand 20, which makes it possible to ensure circumferential coverage of the strand over its entire circumference, i.e. 360°, in the mounted position.

[0151] Thanks to the single-piece fixing interface, the implementation on the tube or strand carried out by radial spacing of the two end parts is simplified.

[0152] In addition, the installation of the fixing interface does not require any tools and saves time during its installation.

[0153] Furthermore, it is possible to mount such a fixing interface on a strand at any stage of use of the strand.

[0154] Finally, such a fixing interface is capable of adapting to different strand diameters.

Claims

CLAIMS 1. Interface (10) for fixing at least one electric cable mounted in a tube (20) configured to ensure the mechanical connection between said tube (20) and a member (30) for fixing tubes by clipping or by clamping, said fixing interface (10) comprising a main body (12) extending along a first elevation axis (Xl-Xl') and intended to surround the tube (20) in a mounted position, characterized in that the main body (12) has a generally spiral shape and is circumferentially delimited by a first and a second end portion (13, 15) each comprising a free end (13a, 15a), the free ends (13a, 15a) of the first and second end portions (13, 15) being angularly offset relative to each other so as to define an overlap zone (Z) of the first and second end portions (13, 15), the first and second end parts (13,15) of the fixing interface (10) being elastically deformable and radially movable between an initial, rest position, in which said first and second end portions (13, 15) are radially spaced from each other by a radial clearance at the level of the overlap zone (Z) and a mounted position in which said first and second end portions (13, 15) are in radial contact with each other at least over a part of the overlap zone (Z), the spiral shape of the main body (12) gives the fixing interface elastic properties., 2. Fixing interface (10) according to claim 1, wherein the main body (12) is radially delimited by an internal surface (12a) and an external surface (12b) and axially by two shoulders (14, 16) at each of its ends.

3. A fixing interface (10) according to any preceding claim, wherein the fixing interface (10) is a single-piece.

4. Fixing interface (10) according to any one of the preceding claims, in which the overlap zone (Z) of the first and second end parts (13, 15) extends from the free end (13a, 15a) of each end part (13, 15) over an angular portion of between 5° and 30°, preferably between 15° and 20°.

5. A fixing interface (10) according to any preceding claim, wherein one of the first and second end portions (15) comprises, on its inner surface (12a), an internal axial groove (17) and the other of the first and second end portions (13) comprises, on its outer surface (12b), an external axial groove (18).

6. A fixing interface (10) according to claim 5, wherein the internal axial groove (17) is circumferentially delimited by a free end (15a) of one of the first and second end portions (15) and by a first radial stop (17a), the external axial groove (18) preferably being circumferentially delimited by a free end (13a) of the other of the first and second end portions (13) and by a second radial stop (18a).

7. Assembly comprising a tube (20) comprising at least one electrical cable and extending along a second elevation axis (X2-X2') and a fixing interface (10) according to any one of the preceding claims mounted around said tube (20), the first axis (Xl-Xl') of the fixing interface (10) being coaxial with said second axis (X2-X2') of the tube (20).

8. Assembly comprising an assembly according to claim 7 and a member (30) for fixing tubes by clipping or by clamping, the fixing interface (10) being configured to ensure the mechanical connection between said tube (20) and said member (30) for fixing tubes.

9. Method of assembling the assembly according to claim 7, in which: - the fixing interface (10) is positioned close to the tube (20) and the two end portions (13, 15) are elastically spaced circumferentially from each other so as to form a circumferential space (19) between said end portions (13, 15); - the tube (20) is then inserted into the circumferential space (19) of the fixing interface (10) until the tube (20) is located inside said fixing interface and radially against an internal surface (12) of said fixing interface (10), on a side diametrically opposite the circumferential space (19); and - the two end portions (13, 15) are released so as to elastically approach each other around the tube (20) and to come into radial contact with each other and with the tube (20).

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