FR3061122B1 - STRUCTURAL DEVICE FOR THE TRANSVERSAL REINFORCEMENT OF A MOTOR VEHICLE AND VEHICLE THEREFOR - Google Patents

Abstract

The invention relates to a structural device for transverse reinforcement of a motor vehicle characterized in that it comprises at least one portion forming a gutter (1) extending in a rectilinear direction, said main direction, and having a hollow cross section (10) in the shape of a crescent and having a convex outer surface (12) and an inner face forming a groove (11) in the main direction, the groove (11) being intended to receive a cabling (3) and at least a part forming a cover (2) extending in the main direction, cooperating with the gutter (1) so as to close the groove (11) to form a tubular space and to confer, in combination with the gutter (1), a holding mechanical device.

Description

TECHNICAL FIELD OF THE INVENTION The invention relates to the field of the arrangement and structure of motor vehicles. It relates in particular to a transverse reinforcing structural device of a motor vehicle, an assembly comprising such a device and a wiring placed in the device. The invention also relates to a motor vehicle comprising such an assembly. 2. Prior Art

Motor vehicles conventionally include metal sleepers to strengthen the vehicle structure and fix different parts, especially electrical boxes and wiring.

Figures 1 and 2 show a cross member T according to the prior art. The crosspiece T comprises hollow tubular elements assembled together. The wiring C is placed along the crossbar T and is fixed to the crossbar T at several points by a fastening system A having a collar surrounding the wiring and a pin attached to the collar fitting into a hole of the crossbar. The wiring comprises R branches feeding the different electrical boxes. The electrical boxes B are fixed to the crossbar T by means of metal plates welded to the cross member.

With reference to FIG. 2, the crossbar T has a volume inside the unused hollow tubular elements. In addition, current vehicles include more and more electrical elements, located in particular in the dashboard, which poses problems of lack of volume. 3. Objectives of the invention The invention proposes a solution to overcome the aforementioned drawbacks. An object of the invention is to optimize the use of space in the arrangement of motor vehicles so as to increase the comfort space and to limit the space required for the implantation of structural elements and electrical elements while maintaining a vehicle structure having good mechanical strength. 4. SUMMARY OF THE INVENTION The invention relates to a structural device for transverse reinforcement of a motor vehicle comprising: at least one portion forming a gutter extending in a rectilinear direction, said main direction, and having a hollow cross section in crescent shape thus having a convex outer face and an inner face forming a groove in the main direction, the groove being intended to receive a wiring; and - at least one lid-forming portion extending in the main direction and having a U-shaped cross-section cooperating with the gutter so as to close the groove to form a tubular space and to impart, in combination with the gutter, a mechanical resistance to the device.

Such a device has the advantage of allowing the passage of the wiring inside the device in the groove so as to optimize the use of the space occupied by the device.

The stiffness of the device composed of the gutter and the lid is thus reinforced, which allows a good mechanical strength, in particular the gutter and the cover can be arranged so that the stiffness of the device is at least as important as the stiffness of the device. a classic tubular transom.

In addition, the invention makes it possible to increase the possibilities of implantation of electrical boxes and to simplify the assembly of the vehicle.

According to one embodiment of the invention, the lid may comprise one or more ribs obtained by stamping and extending in the main direction. The rib increases the mechanical strength of the lid to increase its mechanical strength.

According to a particular embodiment, the cover may comprise at least one elastic element for holding the wiring in the groove. The elastic element is for example a spring which bears on the wiring so as to deform slightly to press the wiring at the bottom of the groove. Such elastic element for maintaining the wiring limits the movements of the wiring and therefore the risk of deterioration of the wiring during these movements.

According to a particular embodiment, the cover may comprise at least one electrical box fixing support. The cover has the advantage of having many potential locations for mounting brackets of electrical boxes. With regard to the mounting of the vehicle, the electrical boxes can be preassembled on the cover so as to create a subassembly which will then be assembled on the gutter. The creation of such subassemblies facilitates assembly and multiplies the assembly tasks that can be performed in parallel so as to reduce the assembly time.

According to a particular embodiment, the device may comprise at least one lateral opening, at the interface between the gutter and the cover, intended for the passage of branches of the wiring. Such openings make it possible to limit the length of cables necessary to connect the electrical boxes to each other by pulling out of the groove or entering the groove each cable at the corresponding housing.

According to a particular embodiment, the gutter and the cover may be fixed to each other by a fastening system comprising at least one stud and a nut. The fastening system stud / nut gives a good strength to the device.

In a particular embodiment, the gutter and the lid can be attached to each other at least partially by respective parts fitting one into the other. Such a fastening system is for example an embossing system which allows rapid assembly of the two parts while ensuring good strength to the device.

In a particular embodiment, the cover has rounded edges to avoid cutting or damaging the wiring and in particular the branches of the wiring.

Several achievements referred to above can be combined with each other. The invention also relates to an assembly comprising a device according to the invention and an electrical wiring disposed in said groove. The wiring is thus protected by the device and frees space outside the device compared to a conventional configuration.

According to a particular embodiment, the channel comprises a first through hole located in the hollow of the groove and a second through hole located in the convex outer face facing the first through hole so as to allow the evacuation of liquid present in the groove, by example of water.

According to a particular embodiment, the assembly comprises two gutters and two covers, the curved faces of the two gutters being welded to one another in the main direction, an electrical wiring being disposed in the groove of each of the gutters and the two covers cooperating respectively with the two gutters. Such an assembly provides a robust structural reinforcement and distributes the wiring into two subassemblies. The invention also relates to a motor vehicle comprising an assembly according to the invention. The assembly is for example mounted under the dashboard. Such a vehicle includes a reduced cockpit volume which frees up space for storage or other comfort items. 5. List of Figures Other features and innovative advantages will become apparent from the following description, provided for information only and by no means limitative, with reference to the accompanying drawings, in which:

FIG. 1 represents a schematic perspective view of a dashboard cross member of a vehicle according to the prior art;

Figure 2 shows a schematic cross-sectional view of the cross member of Figure 1;

FIG. 3 is a diagrammatic perspective exploded view of an assembly comprising a transverse reinforcement structural device of a motor vehicle according to a first embodiment of the invention and an electrical wiring;

Figure 4 shows a cross section of a cover of a structural transverse reinforcement device of a motor vehicle;

FIG. 5 represents a cross section of an assembly comprising a transverse reinforcement structural device of a motor vehicle according to a second embodiment of the invention;

Figure 6 shows a schematic cross-sectional view of an assembly comprising a transverse reinforcement structural device with two gutters and two covers according to a third embodiment of the invention and an electrical wiring. 6. Detailed description

Figures 3 to 6 are oriented relative to a vector Y extending in a main direction.

FIG. 3 shows an assembly comprising a transverse reinforcement structural device of a motor vehicle according to a first embodiment of the invention and an electrical wiring 3. The transverse reinforcement structural device comprises a part forming a gutter 1 and a part forming lid 2.

Gutter 1 extends rectilinearly in the main direction. It has a hollow cross section 10 in the shape of a crescent. Gutter 1 thus has a convex outer face 12 and an inner face forming a groove 11 in the main direction. The wiring 3 is placed in the groove 11. The channel 1 is preferably metallic.

The cover 2 extends in the main direction and has a U-shaped cross section 20. The cover 2 thus has a curved outer surface 202 and an inner face forming a tunnel 201. The cover 2 cooperates with the gutter 1 so closing the groove 11 with the tunnel 201 to form a tubular space. The lid 2 is preferably metallic. In addition, the cover 2, in combination with the gutter 1, gives a mechanical strength to the device which is preferably at least equivalent to the mechanical strength of a conventional cross member.

The cover has a rib 21 extending in the main direction. The rib is obtained by stamping and corresponds to a deformation according to a line segment projecting or retreating into the convex face 202 of the lid.

The cover comprises an elastic element 23 for holding the wiring in the groove. The elastic element 23 is for example a narrow plastic plate extending in a transverse direction across the tunnel and stressed so as to have a curved central portion and pointing towards the wiring. When the gutter and the cover are assembled, the elastic element 23 is pressed against the wiring and exerts a pressure on the wiring towards the bottom of the groove 11.

The cover 2 comprises a mounting bracket 24 of the electrical box. According to the embodiment shown, the mounting bracket 24 of the electrical box is a metal plate extending in a transverse direction, welded to the convex face 202 of the cover and folded substantially in the middle at an obtuse angle. The mounting bracket has on a distal portion, located beyond the obtuse angle, a fastening pin 240 for fitting into a complementary shaped member of an electrical box. The fastening stud 240 has a threaded portion so that when the stud is nested in the complementary shape member of the housing, for example a through hole, a nut holds the stud nested. The fixing brackets 24 are for example welded to the cover 2. The gutter comprises similar fastening supports 14.

The device comprises lateral openings, at the interface between the trough 1 and the cover 2, intended for the passage of branches 31 of the wiring including a lateral opening 13 located around the bypass 31 in the trough 1 and an extended oblong opening 22 according to the main direction in the lid 2.

The gutter 1 and the lid 2 are fixed to each other by a fastening system comprising at least one stud and a nut. The lid has female attachment plates 25 protruding from the longitudinal slices 250 of the lid and the gutter has male attachment plates 15 protruding from the longitudinal slices 150 of the gutter. The female attachment plates 25 have an orifice 26 and the male attachment plates 15 have a threaded stud 16. In the assembled position, that is to say when the lid 2 cooperates with the trough 1 to form a tubular space, the female fixing plates 25 are pressed against the corresponding male fixing plates 15 so that the stud 16 of each male fixing plate 15 is placed in the hole 26 of the corresponding female attachment plate 25. A nut 27 is screwed onto each pin 16 to secure the gutter 1 and the lid 2 to one another and thus maintain the assembled position.

Gutter 1 has a first through hole 17 located in the hollow of the groove 11 and a second through hole 18 located in the convex face facing the first through hole 17 so as to allow the evacuation of liquid present in the groove, for example some water.

With reference to FIG. 4, the longitudinal slices 250 of the cover 2 have rounded edges 25 'to avoid cutting or damaging the wiring 3 and in particular the branches 31 of the wiring.

Figure 5 shows another fastening system in which the gutter 1 and the cover 2 are attached to each other at least partially by respective parts fitting one into the other. The gutter 1 has a projecting protrusion of a first longitudinal slice 151 a spout 19 of hook-shaped cross section. The cover 2 has a protrusion 29 protruding from a first longitudinal edge 251. The spout 19 and the protrusion 29 have a complementary shape so that the protrusion 29 is able to fit into the spout 19 in the assembled position of the trough 1 and the cover 2. The trough 1 comprises projecting a second longitudinal edge 152 of the male attachment plates 15 and the cover 2 has a projecting projection of a second longitudinal edge 252 of the female attachment plates 25 in accordance with this which has been described in Figure 3.

According to another embodiment shown in FIG. 6, the transverse reinforcement structural device comprises two gutters 1a and 1b and two covers 2a and 2b. The curved faces of the two gutters are welded to one another according to a weld 100 extending in the main direction. The groove of the first gutter has a first portion of the wiring 3a and the groove of the second gutter lb has a second portion of the wiring 3b. The first wiring portion 3a includes taps 31a and the second wiring portion includes taps 31b. A first cover 2a cooperates with the first channel 1a to form a tubular space and in a similar manner, a second cover 2b cooperates with the second channel 1b. The first wiring portion 3a is held in the hollow of the groove of the first channel 1a by a collar 33a surrounding the wiring 3a and having a deformable fixing pin 34a arranged to be introduced into a through orifice of the channel when the pin of 34a is compressed and to return to its original shape at the end of the through hole so as to maintain the collar 33a attached to the gutter. Similarly, the second wiring portion 3b is held in the groove of the groove of the second groove lb by a collar 33b surrounding the wiring 3b and having a deformable fixing pin 34b. The invention is described in the foregoing by way of example. It is understood that one skilled in the art is able to achieve different embodiments of the invention, for example by combining the various characteristics above taken alone or in combination, without departing from the scope of the invention. .

Claims (3)

1. transverse reinforcement structural device of a motor vehicle characterized in that it comprises: at least one portion forming a gutter (1) extending in a rectilinear direction, said main direction, and having a hollow cross section (10); ) crescent-shaped and thus having a curved outer surface (12) and an inner face forming a groove (11) in the main direction, the groove (11) being intended to receive a wiring (3); and at least one lid-forming portion (2) extending in the main direction, having one or more ribs (21) extending in the main direction, and cooperating with the gutter (1) to close the groove ( 11) forming a tubular space and to confer, in combination with the gutter (1), a mechanical strength to the device. 2. Device according to the preceding claim characterized in that the cover (2) comprises at least one elastic element (23) for holding the wiring (3) in the groove (11). 3. Device according to any one of the preceding claims characterized in that the cover (2) comprises at least one mounting bracket (24) of electrical boxes. 4. Device according to any one of the preceding claims characterized in that it comprises at least one lateral opening (13, 22) at the interface between the trough (1) and the cover (2) for the. passage of branches (31) of the wiring. 5. Device according to any one of the preceding claims characterized in that the gutter (1) and the lid (2) are fixed to each other by a fastening system comprising at least one stud (16) and a nut (27). 6. Device according to any one of the preceding claims characterized in that the gutter (1) and the lid (2) are fixed to each other at least partially by respective parts fitting one in 1 'other. 7. An assembly comprising a device according to any one of the preceding claims and an electrical wiring (3) disposed in said groove (11). 8. Assembly according to the preceding claim characterized in that it comprises two gutters (1) and two covers (2), the curved outer faces (12) of the two gutters (1) being welded to one another according to the main direction, an electrical wiring (3) being disposed in the groove (11) of each of the gutters (1) and the two covers (2) cooperating respectively with the two gutters (1). 9. Motor vehicle comprising an assembly according to claim 7 or claim 8.