Automotive floor arrangement

Abstract

The invention relates to a floor arrangement (1) for a motor vehicle, the floor arrangement (1) comprising a front floor (11A) and a rear floor (11B) extending into a passenger compartment of the motor vehicle, a central tunnel (12) extending along a longitudinal axis (X) and comprising a middle tunnel (122) and a front tunnel (121) situated in the extension of the middle tunnel (122), the middle tunnel (122) comprising at least a first opening (1223A) (1223) delimiting a narrowing (18) with a side wall (1221) of the middle tunnel (122). According to the invention, the floor arrangement (1) comprises at least one local reinforcement (13A, 13B) associated with at least one narrowing (18) of the middle tunnel (122), the local reinforcement (13A, 13B) forming a doubling of the middle tunnel (122) at the narrowing (18) and fixed to the middle tunnel (122) by welding. Figure to be published with the abbreviation: Fig. 2

Description

Title of the invention: Floor arrangement for motor vehicle

[0001] The technical context of the present invention is that of structural fittings for motor vehicles, and in particular those in the passenger compartment. More specifically, the invention relates to a floor arrangement for a motor vehicle.

[0002] In the prior art, motor vehicles are known to have a chassis consisting of a central tunnel formed by a front tunnel and a middle tunnel, a front floor and a rear floor, and lateral cross members that stiffen the floor between two side members. The central tunnel extends from front to rear along a central axis of the motor vehicle, over the lateral cross members. Such a central tunnel allows for the passage of connecting or transmission elements of a motor vehicle's powertrain, or even electrical connection equipment.

[0003] As is known, in electrified motor vehicles, such as electric or hybrid vehicles, a battery tray is located under the vehicle floor. This central configuration protects the battery tray from direct frontal or lateral impacts. Indeed, it is essential to preserve the structural integrity of the battery tray under all circumstances, as the risk of fire is significant in the event of perforation or deformation, leading to very serious damage to the vehicle.

[0004] However, in the event of a high-speed frontal collision, for example, deformations of the chassis and / or floor can lead to deformation of the battery tray and—consequently—to damage to the electric traction battery. Indeed, during a high-speed frontal collision, the mechanical stresses induced by the impact propagate through the chassis of the motor vehicle, notably via the front frame rails and side members. The dimensioning and geometry of these components are particularly important to preserve both the physical integrity of the passenger compartment and that of the battery tray. To a lesser extent, the floor of the motor vehicle can be stressed during the transmission of these forces resulting from the impact. In the event of floor deformation, a more pronounced deformation is observed at the central tunnel, and particularly at the interface of the side crossmembers.

[0005] Indeed, in a known manner, the central tunnel has openings that define constrictions in a wall forming the central tunnel. Such constrictions The wall concentrates the mechanical stresses resulting from the impact, leading to unwanted deformation of the central tunnel, or even tears. Such deformations or tears increase the risk of damage to the battery tray located below.

[0006] To limit these deformations of the central tunnel, document FR3093984B1 describes a vehicle with a central tunnel reinforcement. The reinforcement shown here forms a piece that covers the tunnel from one side wall to the other, doubling the thickness of the central tunnel over a large portion. While this configuration does indeed increase the rigidity of the central tunnel, it considerably increases its mass and leads to the blocking of certain other openings on the central tunnel that are necessary for its assembly, for example.

[0007] The present invention aims to propose a new floor arrangement in order to address at least largely the previous problems and to lead to further advantages.

[0008] Another objective of the invention is to reinforce the rigidity of the central tunnel and to limit its deformation in the event of a frontal impact, in order to better secure the battery tray located below.

[0009] Another object of the invention is to reduce the mass of such a floor arrangement.

[0010] Another object of the invention is to enable the manufacture of such an arrangement floor without modifying the other parts of the floor arrangement and / or its integration on the motor vehicle.

[0011] According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with a floor arrangement for a motor vehicle, the floor arrangement comprising:

[0012] - a front floor and a rear floor extending into a vehicle passenger compartment automobile;

[0013] - a central tunnel extending along a longitudinal axis at the level of a part median of the front floor and the rear floor, the central tunnel comprising a middle tunnel and a front tunnel situated in the extension and in front of the middle tunnel, the middle tunnel comprising at least one opening delimiting at least one narrowing of a wall forming the middle tunnel.

[0014] According to the invention, the floor arrangement includes at least one local reinforcement associated with at least one narrowing of the middle tunnel.

[0015] In the context of the present invention, a longitudinal axis, a lateral axis, and a vertical axis are defined with respect to the motor vehicle on which the floor arrangement according to the first aspect of the invention is intended to be mounted. More particularly, the transverse axis is understood as a direction taken between one lateral side of the motor vehicle and an opposite lateral side of said motor vehicle. In other words, the transverse axis is understood as a direction extending from a passenger side of the motor vehicle to a driver's side of said motor vehicle, or vice versa. The adjectives lateral, inside, and outside refer to such a transverse axis. Furthermore, the longitudinal axis is understood as a direction extending from the front to the back or from the back to the front of the motor vehicle. The longitudinal axis is perpendicular to the transverse axis. The adjectives front, front, and rear refer to this longitudinal axis. Finally, the vertical axis is understood as a direction extending from the wheels of the motor vehicle to the roof of said motor vehicle, or vice versa, the vertical axis being simultaneously perpendicular to the transverse and longitudinal axes. The adjectives above and below, or lower and upper, refer to this vertical axis.

[0016] In the context of the present invention, the local reinforcement takes the form of a patch. In other words, the local reinforcement takes the form of a plate, sheet, or rebate shaped according to the local geometry of the central tunnel at the point of constriction to which the local reinforcement is associated. The local reinforcement is limited to the constriction or to a peripheral area of ​​the constriction. In other words, the local reinforcement extends only to the point of constriction of the central tunnel. The local reinforcement covers the constriction of the central tunnel. The local reinforcement is not applied to a larger area of ​​the central tunnel. By "associated with," it is understood that the local reinforcement extends over the constriction. In other words, the local reinforcement is applied at least to the constriction, that is, supported against the central tunnel, at least at the point of constriction located near the corresponding opening.Furthermore, the local reinforcement is fixed securely to the central tunnel, preferably by non-permanent fastening means, i.e., means that it cannot be detached without damaging the local reinforcement and / or the central tunnel. Preferably, the local reinforcement is fixed securely to the central tunnel by welding. The floor arrangement thus includes at least one weld bead and / or a plurality of spot welds that connect the local reinforcement to the wall of the central tunnel located near the corresponding opening.

[0017] In the context of the present invention, the central tunnel is primarily associated with the rear floor. The central tunnel extends from a rear end of the front tunnel to a rear trunk of the motor vehicle. The central tunnel and the front tunnel have an identical or similar cross-section—taken in a plane perpendicular to the longitudinal axis. The central tunnel, for example, has a U-shaped or V-shaped cross-section. Generally, the central tunnel and the front tunnel have the same width—taken along the transverse axis.

[0018] In the context of the present invention, the front tunnel is predominantly associated with the front floor. The front tunnel extends from a frontal end of the middle tunnel to a front bulkhead of the motor vehicle. The front tunnel has, for example, a U-shaped or V-shaped cross-section.

[0019] In the context of the present invention, the floor extends under the passenger compartment and allows for the subsequent attachment of seats for the occupants of the motor vehicle. The floor defines a substantially flat surface that extends longitudinally from front to back and transversely between two side members of the motor vehicle. Relative to the vertical axis, above the floor is the passenger compartment of the motor vehicle, and below the floor are transmission components in the case of a combustion engine vehicle or a battery module in the case of a hybrid or electric vehicle.

[0020] In the context of the present invention, the front floor is located under the driver's seat of the motor vehicle. The front floor forms a structural element for the passenger compartment and to which, in particular, the seats of the motor vehicle are attached.

[0021] In the context of the present invention, the rear floor is located under the rear passenger seats of the motor vehicle. The rear floor forms a structural element for the passenger compartment and to which, in particular, the seats of the motor vehicle are attached. The rear floor extends directly behind the front floor, relative to the longitudinal axis.

[0022] Thus, the floor arrangement according to the first aspect of the invention solves the technical problem in that it makes it possible to locally reinforce the rigidity of the central tunnel, without obstructing openings that can be used for its assembly on the motor vehicle.

[0023] The floor arrangement according to the first aspect of the invention advantageously comprises at least one of the improvements below, the technical characteristics forming these improvements being able to be taken alone or in combination:

[0024] - the local reinforcement extends outside of at least one opening of the middle tunnel. In other words, the local reinforcement does not obstruct at least one opening, allowing the opening to be used during the assembly of the floor assembly onto the vehicle. Specifically, the local reinforcement extends between the openings of the central tunnel. Optionally, the local reinforcement extends between a side edge and an opening of the central tunnel. This advantageous configuration helps to limit the added mass of the floor assembly.

[0025] - each at least one local reinforcement extends along a lateral wall of the tunnel middle; or each at least one local reinforcement extends along an upper wall of the tunnel middle; or each at least one local reinforcement extends along both the lateral wall and part of the proximal upper wall of said lateral wall of the middle tunnel;

[0026] - at least one constriction is delimited by (i) a first opening formed on an upper wall of the middle tunnel, and (ii) a second opening formed on a lateral wall of the middle tunnel, with at least one local reinforcement extending between the first and second openings. In the context of the present invention, the first opening is of the type of a passage opening for a welding clamp—necessary for assembling the middle tunnel onto the floor. The first opening is circular or oblong in shape, and has a diameter or larger dimension of less than 10 cm, preferably less than 5 cm. Generally, the first opening is delimited by a closed contour and has a surface area on the order of a few square centimeters, or even a few tens of square centimeters. In the context of the present invention, the second opening forms a bridge that allows a lateral crossmember of the front floor to pass under the middle tunnel.In other words, the second opening passes completely through the central tunnel along the transverse axis. The second opening is delimited by an open contour leading to a lower edge of the central tunnel in contact with the rear floor. The contour delimiting the second opening has a generally polygonal shape, for example trapezoidal or rectangular;

[0027] - at least one local reinforcement extends both along the upper wall and along the of the side wall. In other words, at least one local reinforcement has a folded shape, said local reinforcement comprising a first part bearing against the upper wall of the middle tunnel and a second part bearing against the side wall of the middle tunnel, the second part of the local reinforcement being secant to the first part of said local reinforcement. In particular, the second part extends perpendicularly or substantially perpendicularly to the first part;

[0028] - each at least one local reinforcement extends on either side of the narrowing, relative to the longitudinal axis. This advantageous configuration allows for increased rigidity of the central tunnel at the narrowing. The longitudinal overhang on either side of the narrowing ensures good force transmission through the central tunnel at the narrowing zone;

[0029] - each at least one local reinforcement is located along a lateral edge of the tunnel of the middle. In other words, each at least one local reinforcement extends only on one side of the middle tunnel. Thus, unlike reinforcements known from the prior art, the local reinforcement is a reinforcement limited to a specific area of ​​the middle tunnel. In other words, the lateral and longitudinal dimensions of the local reinforcement are significantly smaller than the lateral and longitudinal dimensions of the middle tunnel;

[0030] - the local reinforcement is formed of a metallic material, preferably of the type of a High-yield-strength steel. This advantageous configuration effectively reinforces the rigidity of the central tunnel at the narrowing. The local reinforcement is supported against the corresponding wall of the central tunnel. The local reinforcement covers and caps the corresponding wall of the central tunnel. In other words, the local reinforcement covers the corresponding wall of the central tunnel;

[0031] - the local reinforcement takes the form of a folded or stamped sheet metal. This configuration advantageous allows for the industrial and cost-effective manufacture of local reinforcement, thus reducing the manufacturing costs of the floor arrangement according to the invention;

[0032] - the local reinforcement has a thickness greater than or equal to 1 mm. Preferably, the local reinforcement has a thickness between 1 mm and 3 mm. This advantageous configuration allows for sufficient stiffening of the central tunnel at its narrowing point, without significantly increasing its mass. Advantageously, the thickness of the local reinforcement is constant across its entire surface. In other words, the local reinforcement takes the form of a folded sheet metal.

[0033] According to a second aspect of the invention, a motor vehicle is proposed comprising a floor arrangement conforming to the first aspect of the invention or to any one of its improvements.

[0034] Advantageously, the motor vehicle is of the type of an electrified vehicle comprising a battery tray housing an electric traction battery under the rear floor of the floor arrangement.

[0035] In the context of the present invention, an electrified motor vehicle may be of the type of an electric vehicle pulled exclusively by an electric motor powered by a traction battery, or of the type of a hybrid motor vehicle comprising both the electric motor powered by the traction battery and associated with another propulsion system, such as an internal combustion engine, to propel the motor vehicle. Among hybrid motor vehicles, a distinction is made between plug-in hybrid vehicles, for which the traction battery can be recharged by connecting to an external power source, and non-plug-in hybrid vehicles, i.e., those not equipped for such recharging of the traction battery from an external electrical grid.

[0036] Generally, the drivetrain of such an electrified motor vehicle is rotated by an electric machine, electrically powered by a traction battery, in order to generate motor torque used to propel the motor vehicle. Complementarily or alternatively, the electric machine is configured to recover mechanical energy from the drivetrain. traction and convert it into electrical energy, thereby producing a braking torque on said traction chain and allowing the electric traction battery to be recharged.

[0037] In the context of the present invention, the traction battery is a high-voltage electric battery capable of generating a direct current voltage of at least 300V, for example, 400V or 800V. Generally, the traction battery is configured to supply electrical energy to an electric machine that generates motor torque on the traction system of the motor vehicle.

[0038] Various embodiments of the invention are provided, incorporating, according to all their possible combinations, the different optional features set out here.

[0039] Other features and advantages of the invention will become apparent from the following description on the one hand, and from several illustrative and non-limiting examples of embodiments given with reference to the accompanying schematic drawings on the other hand, in which:

[0040] [Fig-1] illustrates a three-dimensional overview of an example embodiment of a floor arrangement conforming to the first aspect of the invention;

[0041] [Fig.2] illustrates a detailed view of the floor arrangement shown in [Fig.1];

[0042] [Fig.3] illustrates a top view of the middle tunnel of the floor arrangement illustrated on [Fig.1];

[0043] [Fig.4] illustrates a detailed view of a first reinforcement of the middle floor;

[0044] [Fig.5] illustrates a detailed view of a second reinforcement of the middle floor.

[0045] Of course, the features, variants, and different embodiments of the invention can be combined in various ways, provided they are not incompatible or mutually exclusive. In particular, variants of the invention may be conceived comprising only a selection of features, described hereafter in isolation from the other described features, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the prior art.

[0046] In particular, all the variants and all the embodiments described are combinable with each other if there is nothing technically preventing this combination.

[0047] In the figures, the elements common to several figures retain the same reference.

[0048] In the FIGURES described below, a longitudinal axis X, a lateral axis and a vertical axis Z are defined relative to the motor vehicle on which the floor arrangement 1 according to the invention is intended to be mounted.

[0049] More specifically, the transverse axis Y is understood as a direction taken between one lateral side of the motor vehicle and an opposite lateral side of said vehicle automobile. In other words, the transverse Y-axis is understood to be a direction extending from a passenger side of the motor vehicle to a driver's side of said motor vehicle, or vice versa. The adjectives lateral, interior, and exterior refer to such a transverse Y-axis.

[0050] Furthermore, the longitudinal axis X extends as if taken along a direction extending from front to rear or rear to front of the motor vehicle. The longitudinal axis X is perpendicular to the transverse axis Y. The adjectives front, front, and rear refer to this longitudinal axis X.

[0051] Finally, the vertical axis Z is understood as being taken along an axis which extends from the wheels of the motor vehicle and towards the roof of said motor vehicle, or vice versa, the vertical axis Z being simultaneously perpendicular to the transverse axis Y and to the longitudinal axis X. The adjectives above and below, or lower and upper, refer to this vertical axis Z.

[0052] With reference to FIGURES 1 to 5, the invention addresses a floor arrangement 1 for a motor vehicle, the floor arrangement 1 comprising:

[0053] - a front floor 1 IA and a rear floor 1 IB extending into a passenger compartment of the motor vehicle. The front floor 1 IA extends in front of the rear floor 1 IB. The front floor 11A extends to a front bulkhead 17 of the motor vehicle. The rear floor 11B extends to a rear compartment of the motor vehicle floor 11. The front floor 1 IA and the rear floor 1 IB extend between two side rails of the motor vehicle, relative to the transverse axis Y;

[0054] - a central tunnel 12 extending along a longitudinal axis X at the level of a middle part of the front floor 1 IA and of the rear floor 1 IB, the central tunnel 12 comprising a middle tunnel 122 and a front tunnel 121 situated in the extension and in front of the middle tunnel 122, the middle tunnel 122 comprising at least one opening 1223, 1223A, 1223B delimiting at least one narrowing 18 of a wall forming the middle tunnel 122.

[0055] According to the invention, the floor arrangement 1 comprises at least one local reinforcement 13A, 13B associated with at least one narrowing 18 of the middle tunnel 122.

[0056] In particular, as seen in [Fig.3], the invention aims to associate with each constriction 18 present at the level of the middle tunnel 122 a local reinforcement 13A, 13B which covers the corresponding wall of said middle tunnel in order to locally increase its thickness and, consequently, its rigidity.

[0057] The central tunnel 12 extends from and above the front floor 1 IA and the rear floor 1 IB, at a central position of the motor vehicle, relative to the transverse axis Y. The central tunnel 12, and in particular the middle tunnel 122, comprises side walls 1221 which delimit along the transverse axis Y said central tunnel 12 and said middle tunnel 122, as well as a top wall 1222 which connects the two side walls 1221. The upper wall 1222 extends horizontally or substantially horizontally, and the side walls 1221 extend vertically or substantially vertically, so that the middle tunnel 122 has a transverse profile - taken in a plane perpendicular to the longitudinal axis X - in a "U" or "V" shape.

[0058] At its upper wall 1222, the middle tunnel 122 has initial openings 1223A that allow the middle tunnel 122 to be assembled, for example, using a welding clamp. Indeed, for the assembly of the middle tunnel 122 and / or its attachment to the rear floor 1 IB of the motor vehicle, it is necessary to pass part of the assembly tool under the upper wall 1222 of the middle tunnel 122, relative to the vertical axis Z. For this purpose, the presence of the initial openings 1223A is essential to allow the manufacture and assembly of the middle tunnel 122. The drawback of this assembly method lies in the fact that these initial openings 1223A lead to the formation of a thinner area of ​​the upper wall 1222 – the narrowing 18 as defined in the invention.

[0059] The narrowing 18 is thus delimited on one side by the first opening 1223A and, on the other side by the lateral edge of the upper wall 1222, that is to say finally by the upper edge of the lateral wall 1221 of the middle tunnel 122. The narrowing 18 is thus predominantly considered along the transverse axis Y or substantially parallel to it.

[0060] Consequently, the invention therefore provides for the doubling of this narrowing 18 by the local reinforcement 13A, 13B which is superimposed and fixed securely to the upper wall 1222 and, possibly, in a complementary manner, to the lateral wall 1221 of the middle tunnel 122.

[0061] As can be seen in FIGURES 2 and 3, the narrowing 18 is also delimited by second openings 1223B which form a bridge over one of the crossbeams that stiffen the rear floor 1 IB. Such crossbeams pass under the middle tunnel 122, through the second openings 1223B provided in the side walls 1221 of said middle tunnel 122. Thus, the proximity of the first openings 1223A and the second openings 1223B form such narrowings 18 which, without the addition of the local reinforcements 13A, 13B, lead to a loss of rigidity of the middle tunnel 122, particularly in the event of a frontal impact.

[0062] Each local reinforcement 13 A, 13B is thus fixed to the upper wall 1222 and / or to the side wall 1221 of the middle tunnel 122 by a plurality of weld points 14A or by weld beads 14B which bind it securely to the middle tunnel 122 in order to reinforce its rigidity.

[0063] Each local reinforcement 13A, 13B associated with each constriction 18 thus delimited in the central tunnel 122 is in the form of a patch, that is to say, a sheet shaped to adapt to the geometry and conformation of the central tunnel 122 at the level of the constriction 18 considered. Each local reinforcement 13A, 13B is thus preferably in the form of a folded metal sheet – by stamping, for example – of a constant thickness greater than 1 mm. Each local reinforcement 13A, 13B is preferably made of a high-yield-strength metallic material to ensure better reinforcement of the local rigidity of the central tunnel 122.

[0064] As can be seen in FIGURES 2 and 3, each local reinforcement 13A, 13B extends between the first opening 1223A and the second opening 1223B and / or between the first opening 1223A and the lateral wall 1221 of the middle tunnel 122, relative to the transverse axis Y. Along the longitudinal axis X, each local reinforcement 13A, 13B extends of course at the level of the constriction 18, but extends slightly forward and slightly backward from said constriction 18. Here, the constriction 18 is taken to be the smallest dimension between the first opening 1223A and the lateral wall 1221 of the middle tunnel 122 taken directly opposite the first opening 1223A.

[0065] Furthermore, an elongation of each local reinforcement 13A, 13B is such that, along the longitudinal axis X, said local reinforcement 13A, 13B extends in the direction of the second opening 1223B, that is, behind the first opening 1223A. In other words, a rear edge of the local reinforcement 13A, 13B is located both behind a rear edge of the first opening 1223A and behind a front edge of the second opening 1223B, along the longitudinal axis X. In addition, an elongation of each local reinforcement 13A, 13B is such that, along the longitudinal axis X, said local reinforcement 13A, 13B extends in the direction of the front tunnel 121, that is, in front of the second opening 1223B. In other words, a front edge of the local reinforcement 13A, 13B is located both in front of a rear edge of the first opening 1223A and in front of a front edge of the second opening 1223B, along the longitudinal axis X.

[0066] FIGURES 4 and 5 illustrate two examples of implementation of such local reinforcements 13A, 13B used on the middle tunnel 122.

[0067] Figure 4 illustrates a first example of an embodiment in which the local reinforcement 13A, 13B comprises:

[0068] - a lateral rebate 131 located in front of the local reinforcement 13A, 13B and in front of the second opening 1223B. The lateral rebate 131 is associated with - that is to say, supported against and fixed securely to - the lateral wall 1221 of the middle tunnel 122. The lateral rebate 131 of the local reinforcement 13A, 13B extends beyond the narrowing 18 itself of the middle tunnel 122, so as to distribute the forces over a wider area of ​​said middle tunnel 122, and in particular at the level of a more rigid area of ​​said middle tunnel 122;

[0069] - a top rebate 132 which extends both over the top wall 1222 of the middle tunnel 122 and on the lateral wall of said middle tunnel 122. The upper rebate 132 extends mainly along the longitudinal axis X at the narrowing 18 of the middle tunnel 122;

[0070] - a rear rebate 133 which extends above the second opening 1223B, relative to the vertical axis Z, along the upper wall 1222 and / or the side wall 1221 of the middle tunnel 122. The rear rebate 133 of the local reinforcement 13A, 13B extends beyond the narrowing 18 itself of the middle tunnel 122, so as to distribute the forces over a wider area of ​​said middle tunnel 122, and in particular at a more rigid area of ​​said middle tunnel 122. Advantageously, the rear rebate 133 has an "L" or "V" shape so as to increase the bearing surface on the side wall 1221 and on the upper wall 1222 of the middle tunnel 122.

[0071] In the embodiment illustrated in [Fig.5], the local reinforcement 13A, 13B is fixed rigidly to the middle tunnel 122 by several weld points 14A distributed between the different rebates 131, 132, 133. In particular, the local reinforcement 13A, 13B has a first weld point 14A associated with the lateral rebate 131 of the local reinforcement 13A, 13B and two second weld points 14A associated with the rear rebate 133 of said local reinforcement 13A, 13B, each second weld point 14A being associated respectively with the lateral wall 1221 or the upper wall 1222 of the middle tunnel 122.

[0072] Fig. 5 illustrates a second embodiment in which the local reinforcement 13A, 13B comprises only a top rebate 132 which extends both over the top wall 1222 of the middle tunnel 122 and over the side wall of said middle tunnel 122. The top rebate 132 extends mainly along the longitudinal axis X at the narrowing 18 of the middle tunnel 122.

[0073] In the embodiment illustrated in [Fig. 5], the local reinforcement 13A, 13B is fixed rigidly to the middle tunnel 122 by several weld beads 14B distributed over the upper rebate 132. In particular, the local reinforcement 13A, 13B comprises a first weld bead 14B located on the side of the first opening 1223A and a second weld bead 14B located on the side of the second opening 1223B. Each weld bead 14B extends along the longitudinal axis X.

[0074] In summary, the invention relates to a floor arrangement 1 for a motor vehicle, the floor arrangement 1 comprising a front floor 1 IA and a rear floor 11B extending into a passenger compartment of the motor vehicle, a central tunnel 12 extending along a longitudinal axis X and comprising a middle tunnel 122 and a front tunnel 121 located in the extension of the middle tunnel 122, the middle tunnel 122 comprising at least a first opening 1223A delimiting a narrowing 18 with a lateral wall 1221 of the middle tunnel 122. According to the invention, floor arrangement 1 includes at least one local reinforcement 13A, 13B associated with at least one narrowing 18 of the middle tunnel 122, the local reinforcement 13A, 13B forming a doubling of the middle tunnel 122 at the narrowing 18 and fixed to the middle tunnel 122 by welding.

[0075] Of course, the invention is not limited to the examples just described, and many modifications can be made to these examples without departing from the scope of the invention. In particular, the various features, forms, variants, and embodiments of the invention can be combined with one another in various ways, provided they are not incompatible or mutually exclusive. Specifically, all the variants and embodiments described above are combinable.

Claims

Demands

1. Floor arrangement (1) for a motor vehicle, the floor arrangement (1) comprising: - a front floor (1 IA) and a rear floor (1 IB) extending into a passenger compartment of the motor vehicle; - a central tunnel (12) extending along a longitudinal axis (X) at the level of a median part of the front floor (11 A) and the rear floor (1 IB), the central tunnel (12) comprising a middle tunnel (122) and a front tunnel (121) situated in the extension and in front of the middle tunnel (122), the middle tunnel (122) comprising at least one opening (1223) delimiting at least one narrowing (18) of a wall forming the middle tunnel (122); characterized in that the floor arrangement (1) comprises at least one local reinforcement (13A, 13B) associated with at least one narrowing (18) of the middle tunnel (122).

2. Floor arrangement (1) according to the preceding claim, wherein the at least one narrowing (18) is delimited by: - ​​a first opening (1223A) formed on an upper wall (1222) of the middle tunnel (122); and - a second opening (1223B) formed on a side wall (1221) of the middle tunnel (122), the at least one local reinforcement (13A, 13B) extending between the first opening (1223A) and the second opening (1223B).

3. Floor arrangement (1) according to the preceding claim, wherein the first opening (1223A) is of the type of a passage opening for a welding clamp - necessary for the assembly of the central tunnel (12) on the floor (11).

4. Floor arrangement (1) according to any one of claims 2 or 3, wherein the second opening (1223B) forms a bridge which allows a lateral cross member (15) of the front floor (1 IA) to pass under the central tunnel (12).

5. Floor arrangement (1) according to any one of claims 2 to 4, wherein at least one local reinforcement (13A, 13B) extends both along the upper wall (1222) and along the side wall (1221) of the middle tunnel (122).

6. Floor arrangement (1) according to any one of the preceding claims, wherein each at least one reinforcement

7.

8.

9.

10. local (13A, 13B) extends on either side of the narrowing (18), relative to the longitudinal axis (X). Floor arrangement (1) according to any one of the preceding claims, wherein the local reinforcement (13A, 13B) is formed of a metallic material, preferably of the type of a high yield strength steel. Floor arrangement (1) according to any one of the preceding claims, wherein the local reinforcement (13A, 13B) takes the form of a folded or stamped sheet. Floor arrangement (1) according to any one of the preceding claims, wherein the local reinforcement (13A, 13B) has a thickness greater than or equal to 1 mm. Motor vehicle comprising a floor arrangement (1) according to any one of the preceding claims.

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