Reinforcement system for motor vehicle floor

Abstract

The invention relates to a reinforcement system (5) for a motor vehicle floor, the reinforcement system (5) comprising an upper plate comprising members for fixing to the floor, a shock absorption zone (10) and a reinforcement zone (11). The absorption zone (10) is integral with the upper plate and is configured to be able to deform at constant force under the effect of an impact. The reinforcement zone (11) is rigid, is configured to be able to transmit a compressive force following the impact, is integral with the upper plate and extends longitudinally in the extension of the absorption zone (10). Figure to be published with the abstract: Fig. 2

Description

Title of the invention: Reinforcement system for motor vehicle floor

[0001] The technical context of the present invention is that of structural elements equipping a motor vehicle, and more particularly of protection assemblies configured to absorb a lateral impact occurring at the level of the motor vehicle. More particularly, the invention relates to a reinforcement system for a motor vehicle floor.

[0002] In the state of the art, structural elements of motor vehicles are known, and in particular protection assemblies configured to absorb an impact occurring at the motor vehicle. These protection assemblies make it possible to dissipate the impact in order to protect elements of the motor vehicle, in particular the elements located at the level of an engine compartment of said motor vehicle, as well as the elements located at the level of a passenger compartment of the motor vehicle, as well as their occupants.

[0003] Among these protection assemblies, we know of so-called "diagonal" reinforcements and side member reinforcements, housed in the side doors of motor vehicles. The diagonal reinforcements and the side members make it possible to limit intrusions in the event of a "barrier side impact", in other words during a side impact against a large surface, such as a side impact induced by another vehicle moving and striking the motor vehicle laterally.

[0004] The disadvantage of these reinforcements is that they provide ineffective lateral protection in the event of a "side pole impact", in other words in the event of a side impact against a narrow surface, such as a fixed obstacle in the form of a tree or a pole.

[0005] Reinforcing structures are also known which are formed of two cross members extending laterally on a floor of the motor vehicle, behind the side doors of the motor vehicle. The two cross members increase the rigidity of the floor during a side impact, in particular during a "side post impact", in other words in the event of a side impact against a narrow surface, such as a fixed obstacle in the form of a tree or a post.

[0006] A disadvantage of these reinforcement structures formed from two crosspieces is that, for electric motor vehicles, their energy absorption capacity in the event of a "side post impact" may be insufficient to protect the electric batteries of the motor vehicle located under a floor known as an electric motor vehicle, behind the diagonal reinforcements and side members.

[0007] The object of the present invention is to propose a new reinforcement system for motor vehicle floor in order to address at least largely the above problems and to further lead to other advantages.

[0008] Another aim of the invention is to propose a space-saving reinforcement system for a motor vehicle floor, guaranteeing the compactness and lightness of the motor vehicle.

[0009] Another aim of the invention is to propose an inexpensive reinforcement system for a motor vehicle floor, so as not to negatively impact the cost of the motor vehicle.

[0010] Another aim of the invention is to propose a reinforcement system for a motor vehicle floor which is simple, both from the point of view of its implementation and from the point of view of its manufacture.

[0011] Another object of the invention is to propose a reinforcement system for a motor vehicle floor which is more satisfactory in terms of reducing electrical risks.

[0012] According to a first aspect of the invention, at least one of the aforementioned objectives is achieved with a reinforcement system for a motor vehicle floor, the reinforcement system comprising (i) an upper plate comprising members for fixing to the floor, (ii) a shock absorption zone secured to the upper plate, the absorption zone being configured to be able to deform at constant force under the effect of an impact, (iii) a rigid reinforcement zone configured to be able to transmit a compressive force following the impact, the reinforcement zone being secured to the upper plate and extending longitudinally in the extension of the absorption zone.

[0013] In the reinforcement system according to the first aspect of the invention, the upper plate securely and simultaneously fixes the absorption zone and the reinforcement zone. The upper plate is a generally planar part, which extends in a main plane.

[0014] In the reinforcement system according to the first aspect of the invention, the absorption zone is configured to be able to absorb an impact. The absorption zone is configured to be deformed following the impact to absorb said impact. In the motor vehicle equipped with the reinforcement system according to the invention, the absorption zone is configured to be between a lateral side of the motor vehicle and the reinforcement zone. It is understood that the absorption zone is configured to be able to absorb a compressive force following a “post side impact”. In other words, the absorption zone is configured to be able to absorb a lateral impact against a narrow surface, such as a fixed obstacle in the form of a tree or a post. Thus, the absorption zone makes it possible to absorb an impact by compression to preserve any element located laterally behind said absorption zone. In particular, in the case of an electric motor vehicle equipped with the shock absorber assembly according to the invention, the absorption zone makes it possible to protect electric batteries of the motor vehicle located under a floor known as an electric motor vehicle.

[0015] In the reinforcement system according to the first aspect of the invention, the reinforcement zone allows force transmission. By "rigid", it is meant that the rigid reinforcement zone is distinguished from the absorption zone configured to undergo deformation. In other words, the reinforcement zone is configured to be resistant to mechanical deformation induced by a lateral post impact.

[0016] By being in the extension of the absorption zone, the reinforcement zone makes it possible to transmit a force originating from the absorption zone. The force originating from the absorption zone is a portion of the force not absorbed by the absorption zone and transmitted in the reinforcement zone. It is understood that the reinforcement zone is configured to be able to transmit a compressive force following a “side post impact” transmitted by the absorption zone. Thus, the reinforcement zone makes it possible to protect from compression any element located laterally behind said absorption zone, on and under the reinforcement zone. In particular, in the case of an electric motor vehicle equipped with the shock absorber assembly according to the invention, the reinforcement zone makes it possible to protect electric batteries of the motor vehicle located under the floor known as the electric motor vehicle.

[0017] Such a reinforcement system, by combining a shock absorption function intended to be implemented upstream of a shock dissipation function, makes it possible to reinforce the floor of a motor vehicle. Such a reinforcement system improves the distribution of forces at the floor of the motor vehicle with which it is fitted and makes it possible to keep the floor rigid. Thus, this solution makes it possible to preserve the electric batteries of the motor vehicle located under the floor known as the electric motor vehicle, while being simple to implement. The reinforcement system according to the invention has the advantage of overcoming the drawbacks mentioned above, without having to make any significant modifications to the floor with which it is fitted.

[0018] The reinforcement system 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:

[0019] - the absorption zone comprises at least one absorption block configured to deform at constant force, each at least one absorption block being integral with the upper plate. In the absorption zone, the at least one absorption block is configured to be able to absorb a shock. The at least one absorption block is configured to be deformed following the shock to absorb said shock. It is understood that the at least one absorption block is configured to be able to absorb a compression force following a “side pole impact”. In other words, the at least one absorption block is configured to be able to absorb a side impact against a narrow surface, such as a fixed obstacle in the form of a tree or a pole. Thus, the at least one absorption block makes it possible to absorb a shock by compression to preserve any element located laterally behind said absorption zone. In particular, in the case of an electric motor vehicle equipped with the shock absorber assembly according to the invention, the at least one absorption block makes it possible to protect electric batteries of the motor vehicle located under a floor called an electric motor vehicle;

[0020] - each absorption block is formed of a honeycomb structure. It is understood that a such absorption block has a profile with several closed cells. Such an absorption block facilitates compression deformation allowing the dissipation of the compression force induced by an impact. For example, each absorption block is formed of a hollow lattice structure. Such an absorption block is optimized to be able to compress;

[0021] - each absorption block is formed from a honeycomb structure;

[0022] - each absorption block is formed from a deformable material, such as for example a synthetic foam, preferably hard. Each absorption block is provided with elasticity, in the sense that their deformable character results from an extension or a compaction of their elastic material. Such an absorption block advantageously allows a passage to be provided therein for the passage and protection of an electrical harness;

[0023] - for example, each absorption block is obtained by 3D printing. This process industrial forming makes it possible to obtain a large number of identical units in volume at a lower cost by adding material in successive layers from a three-dimensional computer model, in particular designed using a computer-aided design tool also called CAD. An example of 3D printing is by laser polymerization in a resin tank, or in additive mode. Alternatively, each absorption block is obtained by molding. This industrial forming process makes it possible to obtain a large number of identical units at a lower cost by repeating the use of the same mold;

[0024] - the absorption zone is fixed in a non-detachable manner to the plate upper. By "non-detachable" is meant that the absorption zone is permanently fixed to the upper plate, the absorption zone and the upper plate being able to be separated from each other only by destruction and / or damage to a part of the absorption zone and / or a part of the upper plate. A non-detachable means of fixing is for example by gluing or welding;

[0025] - the rigid reinforcement zone comprises at least one ribbed reinforcement member forcibly secured to the upper plate, each ribbed member extending in projection from the upper plate and extending longitudinally from the absorption zone and towards an opposite edge of the upper plate. The at least one ribbed member is configured to reinforce the robustness to mechanical forces that may be imposed on the reinforcement zone. In particular, the at least one ribbed member is configured to reinforce the robustness of the reinforcement zone with regard to a force corresponding to a compression shock. The at least one ribbed member projects from the upper plate and makes it possible to keep the upper plate fixed relative to the reinforcement zone despite a compression shock;

[0026] - each ribbed member comprises at least two ribs extending parallel to each other to each other and having a rectangular transverse profile. The at least two ribs are configured to reinforce the robustness to mechanical forces that may be imposed on the ribbed member. In particular, the at least two ribs are configured to reinforce the robustness of the ribbed member with regard to a force corresponding to a compression shock. The at least two ribs project from the upper plate and make it possible to keep the upper plate fixed relative to the reinforcement zone despite a compression shock. Such a ribbed member with at least two ribs makes it possible to reinforce the reinforcement zone;

[0027] - each ribbed member is formed from a composite material comprising a material plastic reinforced with fibrous material. The fibrous material increases the rigidity of the plastic material. Such a fiber-filled composite material has enhanced mechanical properties of resistance to deformation;

[0028] - in the composite material forming each ribbed member, the plastic material is for example polypropylene;

[0029] - in the composite material forming each ribbed member, the fibrous material is for example PMC, for the English acronym “Phenolic Moulding Compounds” or SMC, for the English acronym “Sheet Moulding Compounds”;

[0030] - the reinforcement zone is fixedly fixed in a non-detachable manner to the top plate. By "non-detachable" is meant that the reinforcement zone is permanently fixed to the top plate, the reinforcement zone and the top plate being able to be separated from each other only by destruction and / or damage to a part of the reinforcement zone and / or a part of the top plate. A non-detachable means of fixing is for example by gluing or welding;

[0031] - the at least one ribbed member comprises at least one metal tube housed between two adjacent ribs of the ribbed member, each at least one metal tube extending parallel to said ribs. The at least one metal tube is configured to reinforce the robustness to mechanical forces that may be imposed on the ribbed member, in addition to the robustness conferred on the ribbed member by the two ribs. In particular, the at least one metal tube is configured to reinforce the robustness of the ribbed member with regard to a force corresponding to a compression shock. The at least one metal tube projects from the upper plate and makes it possible to keep the upper plate fixed relative to the reinforcement zone despite a compression shock. It is understood that the metal tube is a reinforcement, the ribbed member having increased rigidity compared to the adjacent ribs. Advantageously, each tube is cylindrical in shape. A cross-section of each tube is formed by a closed contour, for example circular or polynomial in shape.Advantageously, the cross-section of each tube is invariant in shape and dimension between two longitudinal ends of said tube;

[0032] - each metal tube extends from one face of an absorption block and in direction of the opposite edge of the top plate;

[0033] - in a first embodiment, each metal tube is force-mounted between two adjacent ribs. In a second alternative embodiment to the first embodiment, each metal tube is fixed integrally and in a non-detachable manner to the upper plate. By "non-detachable" is meant that each metal tube is permanently fixed to the upper plate, each metal tube and the upper plate being able to be separated from each other only by destruction and / or damage to a part of each metal tube and / or a part of the upper plate. A non-detachable means of fixing is for example by gluing or by welding;

[0034] According to a second aspect of the invention, there is provided a floor arrangement for a motor vehicle, the arrangement comprising (i) a floor reinforced by two seat crossmembers extending laterally from one edge of the floor to the other and (ii) a reinforcement system in accordance with the first aspect of the invention or according to any of its improvements, the reinforcement system being fixed integrally to the floor at the level of said seat crossmembers.

[0035] In the floor arrangement according to the second aspect of the invention, the floor forms a flat surface intended to form a bottom of a body of a motor vehicle.

[0036] In the floor arrangement according to the second aspect of the invention, the two base crosspieces and the reinforcement system reinforce the floor with regard to mechanical forces that may be imposed on the floor. By being reinforced by two base crosspieces and by the reinforcement system, the floor arrangement according to the invention is intended to be economical in materials, avoiding the addition of crosspieces additional to reinforce the floor. Such a floor arrangement according to the invention is also lighter.

[0037] The reinforcement system has shapes and dimensions complementary to those of the seat crossmembers in order to fit into depression zones formed at the level of the floor and the seat crossmembers. Such a reinforcement system is compact and contributes to a compact floor arrangement, without affecting the interior architecture of a passenger compartment of the motor vehicle with which it is fitted.

[0038] In the floor arrangement according to the second aspect of the invention, the absorption zone of the reinforcement system is located at an outer end of the seat crossmembers, and the reinforcement zone extends parallel to the seat crossmembers. In the motor vehicle equipped with the floor arrangement according to the second aspect of the invention, the outer end is that located at a lateral flank of the motor vehicle. Thus, the invention according to its second aspect makes it possible, following a “side post impact” occurring at a lateral flank of the motor vehicle equipped with the floor arrangement, to initially absorb a compressive force at the absorption zone, then in a second stage a remainder of the force not absorbed by the absorption zone is transmitted into the reinforcement zone.Such a floor arrangement improves the distribution of forces at the floor level of the motor vehicle with which it is fitted and makes it possible to keep said floor rigid.

[0039] The floor arrangement for a motor vehicle in accordance with the second 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:

[0040] - the reinforcement zone of the reinforcement system comprises (i) a ribbed member of front reinforcement which extends longitudinally in front of a front seat crossmember, (ii) a rear ribbed reinforcement member which extends longitudinally behind a rear seat crossmember, (iii) a first intermediate ribbed reinforcement member which extends between two end portions of the front seat crossmember, (iv) a second intermediate ribbed reinforcement member which extends between two end portions of the rear seat crossmember, (v) a third intermediate ribbed reinforcement member located between the rear seat crossmember and the front seat crossmember. The floor arrangement according to the invention comprising such a reinforcement zone takes advantage of a set of spaces, left vacant in the floor arrangements of the prior art, upstream, downstream and between the front seat crossmembers;

[0041] - the absorption zone of the reinforcement system comprises, (i) an absorption block frontal located in the extension of the frontal reinforcement ribbed organ at the level of a front part of the floor, (ii) a rear absorption block located in the extension of the rear ribbed reinforcement member at the level of a rear part of the floor, (iii) a first absorption block located in the extension of the first intermediate ribbed reinforcement member, (iv) a second absorption block located in the extension of the second intermediate ribbed reinforcement member, (v) a third absorption block located in the extension of the third intermediate ribbed reinforcement member.

[0042] - the first absorption block and the second absorption block are identical. by "identical" means that they have the same dimensions and the same shape. Advantageously, it is understood that two "identical" elements have the same mechanical characteristics;

[0043] - the front absorption block and the rear absorption block are identical to each other, and are different from the first absorption block and the second absorption block. "Identical" means that they have the same dimensions and the same shape, and "different" means that they have distinct dimensions and a distinct shape. Advantageously, it is understood that two "identical" elements have the same mechanical characteristics, and two "different" elements have distinct mechanical characteristics;

[0044] - the third absorption block is different from all other absorption blocks. We by "different" is meant the fact that it has distinct dimensions and a distinct shape from the other absorption blocks. Advantageously, it is understood that two "different" elements have distinct mechanical characteristics;

[0045] - the absorption zone of the reinforcement system comprises a passage for a beam electrical system of the motor vehicle, the passage being formed by a cavity configured to accommodate the electrical harness. Such an absorption zone makes it possible to protect the electrical harness housed in the passage.

[0046] According to a third aspect of the invention, there is provided a motor vehicle comprising a floor arrangement in accordance with the second aspect of the invention or according to any of its improvements.

[0047] In the motor vehicle according to the third aspect of the invention, the reinforcement system, by associating a shock absorption function intended to be implemented upstream of a shock dissipation function, makes it possible to reinforce the floor of said motor vehicle. In the motor vehicle according to the third aspect of the invention, the distribution of forces at the floor level makes it possible to keep the floor rigid, in particular during a “side post impact”, in other words in the event of an impact occurring at the level of a lateral flank of the motor vehicle against a narrow surface, such as a fixed obstacle in the form of a tree or a post.

[0048] The motor vehicle according to the second aspect of the invention is for example BEV type for the English acronym Battery Electric Vehicle, equipped with an electric motor. The motor vehicle according to the second aspect of the invention is for example of PHEV type, for the English acronym Plug-in Hybrid Electric, equipped with both a thermal motor and an electric motor. In such a motor vehicle, the floor arrangement is located at the level of the electric batteries of said motor vehicle. Thus, this solution makes it possible to preserve the electric batteries of the motor vehicle located under the floor called electric motor vehicle, while being simple to implement.

[0049] Various embodiments of the invention are provided, integrating according to all of their possible combinations the different optional characteristics set out here.

[0050] Other characteristics and advantages of the invention will become apparent from the following description on the one hand, and from several exemplary embodiments given for informational and non-limiting purposes with reference to the attached schematic drawings on the other hand, in which:

[0051] [Fig.l] illustrates a schematic view of a motor vehicle according to the third aspect of the invention;

[0052] [Fig.2] illustrates a schematic view of a reinforcement system according to the first aspect of the invention in a first variant embodiment;

[0053] [Fig.3] illustrates a schematic view of a floor arrangement in accordance with second aspect of the invention equipped with the reinforcement system shown in [Fig.2];

[0054] [Fig.4] illustrates a first cross-sectional view of the reinforcement system shown in [Fig.2];

[0055] [Fig.5] illustrates a second longitudinal sectional view of the reinforcement system shown in [Fig.2];

[0056] [Fig.6] illustrates a schematic view of a floor arrangement in accordance with second aspect of the invention equipped with a second variant embodiment of the reinforcement system according to the first aspect of the invention.

[0057] Of course, the features, variants and different embodiments of the invention may be combined with each other, in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage or to differentiate the invention from the prior art.

[0058] In particular, all the variants and all the embodiments described can be combined with each other if nothing prevents this combination from a technical point of view.

[0059] In the figures, the elements common to several figures retain the same reference.

[0060] [Fig.l] illustrates a schematic view of a motor vehicle 1 according to the third aspect of the invention, seen from above. In the remainder of the description, a reference frame is defined in which a longitudinal axis OX, a transverse axis OY and a vertical axis OZ are defined. The longitudinal axis OX corresponds to a trajectory of the motor vehicle 1 when it is moving forward, in a straight line and on a flat road. The longitudinal axis OX corresponds to a direction going from the front to the rear of the motor vehicle 1, and it is oriented from the front to the rear of the motor vehicle 1. A longitudinal direction parallel to the longitudinal axis OX is also defined, the adjectives “front”, “rear” or “frontal” refer to this reference direction, as does the term “length”.The transverse axis OY corresponds to the axis around which the wheels of the motor vehicle 1 rotate, and the direction of the axis OY is oriented from a driver's side to a passenger's side, in the non-Anglo-Saxon standard. A transverse direction parallel to the transverse axis OY is also defined, and the adjectives "lateral" or "transverse" refer to this reference direction, as does the term "width". The vertical axis OZ is an axis perpendicular simultaneously to the axis OX and to the axis OY, and which is oriented from a floor of the motor vehicle 1 to a roof of said motor vehicle 1, the adjectives "upper" and "lower" refer to this reference direction, as does the term "height".

[0061] In [Fig.l], the motor vehicle 1 according to the third aspect of the invention comprises a floor arrangement 2 3 according to the second aspect of the invention. The floor arrangement 2 3 comprises a floor 3, two seat crossmembers 4, 20 reinforcing the floor 3 and a reinforcement system 5 for floor 3 according to the first aspect of the invention. The floor 3 comprises lateral edges 6 between which the two seat crossmembers 4, 20 extend in the transverse direction. The floor 3 further comprises a front portion 7 upstream of the seat crossmembers 4, 20 and a rear portion 8 downstream of the seat crossmembers 4, 20, relative to the longitudinal direction.

[0062] In the motor vehicle 1 according to the third aspect of the invention illustrated in [Fig.l], the reinforcement system 5 according to the invention comprises an upper plate 9, a shock absorption zone 10 and a reinforcement zone 11. The floor 3 is included between the arrangement 2 of floor 3 and a battery pack 12 of the motor vehicle 1 which is of the electric type. The floor 3 reinforced by the reinforcement system 5 according to the invention makes it possible to protect the battery pack 12 of the motor vehicle 1 during a compression impact. The reinforcement system 5 and the seat crossmembers 4, 20 are mounted, relative to the transverse direction, behind a lateral side member 13 of the motor vehicle 1. The absorption zone 10 is proximal to the side rail 13 of the motor vehicle 1 and the reinforcement zone 11 is distal to the side rail 13 of the motor vehicle 1.

[0063] FIGURES 2 to 6 illustrate the reinforcement system 5 according to the first aspect of the invention. A first alternative embodiment of the reinforcement system 5 according to the first aspect of the invention is shown in [Fig.2] to 5, and a second alternative embodiment is shown in [Fig.6]. [Fig.4] illustrates a first cross-section AA, illustrated in [Fig.2], of the reinforcement system 5 shown in [Fig.2] and [Fig.5] illustrates a second longitudinal section BB, illustrated in [Fig.2], of the reinforcement system 5 shown in [Fig.2]. In FIGURES 2, 3 and 6, the reinforcement system 5 is illustrated seen from above, without its upper plate 9 in order to facilitate the understanding of said FIGURES. In [Fig.3] and [Fig.6], the seat crosspieces 4, 20 are shown to illustrate a relative positioning of the seat crosspieces 4, 20 and the reinforcement system 5 according to the invention.FIGURES 3 and 6 illustrate in particular a schematic view of the arrangement 2 of floor 3 in accordance with the second aspect of the invention equipped with the reinforcement system 5 according to one of its variant embodiments.

[0064] With reference to FIGURES 2, 3 and 6, the reinforcement zone 11 comprises at least one ribbed member 14, 15, 16, 17, 18 extending longitudinally from the absorption zone 10. In this case, the reinforcement zone 11 comprises five ribbed members 14, 15, 16, 17, 18.

[0065] In the reinforcement system 5 according to the first aspect of the invention illustrated in FIGURES 2, 3 and 6, the reinforcement zone 11 comprises a front ribbed reinforcement member 14, a rear ribbed reinforcement member 15, a first intermediate ribbed reinforcement member 16, a second intermediate ribbed reinforcement member 17 and a third intermediate ribbed reinforcement member 18.

[0066] FIGURES 3 and 6 show that the front ribbed reinforcing member 14 extends longitudinally in front of a front seat crossmember 4. The rear ribbed reinforcing member 15 extends longitudinally behind a rear seat crossmember 20. The first intermediate ribbed reinforcing member 16 extends between two end portions 21, 22 of the front seat crossmember 4. The second intermediate ribbed reinforcing member 17 extends between two end portions 23, 24 of the rear seat crossmember 20. The third intermediate ribbed reinforcing member 18 is located between the rear seat crossmember 20 and the front seat crossmember 4.

[0067] With reference to FIGURES 2, 3 and 6, each ribbed member 14, 15, 16, 17, 18 comprises at least two ribs 100, 200, 300 extending parallel to each other and having a rectangular transverse profile.

[0068] In this case, in the first variant embodiment of the reinforcement system 5 according to the invention illustrated in [Fig.2], the front ribbed reinforcement member 14 comprises two ribs 100. The rear ribbed reinforcement member 15 comprises two ribs 100. The first intermediate ribbed reinforcement member 16 comprises six ribs 200, 300. The second intermediate ribbed reinforcement member 17 comprises six ribs 200, 300. The third intermediate ribbed reinforcement member 18 comprises four ribs 100.

[0069] In this case, in the second variant embodiment of the reinforcement system 5 according to the invention illustrated in [Fig.6], the front ribbed reinforcement member 14 of the reinforcement system 5 and the rear ribbed reinforcement member 15 of the reinforcement system 5 each comprise two ribs 100 and a metal tube 400 housed between two adjacent ribs 100 of the ribbed member 14, 15 considered. The third intermediate ribbed reinforcement member 18 of the reinforcement system 5 comprises two adjacent ribs 100 and two metal tubes 400 housed on either side of the two adjacent ribs 100. Each metal tube 400 extends parallel to the ribs 100 of the ribbed member 14, 15, 18 considered. The first intermediate reinforcing ribbed member 16 comprises six ribs 200, 300. The second intermediate reinforcing ribbed member 17 comprises six ribs 200, 300.

[0070] With reference to FIGURES 2, 3 and 6, the absorption zone 10 of the reinforcement system 5 according to the invention comprises at least one absorption block 25, 26, 27, 28, 29 configured to deform at constant force. In this case, the absorption zone 10 comprises five absorption blocks 25, 26, 27, 28, 29. Each absorption block 25, 26, 27, 28, 29 is formed of a honeycomb structure of the hollow lattice structure type configured to undergo a programmed deformation in response to an impact occurring laterally.

[0071] In the reinforcement system 5 according to the first aspect of the invention illustrated in FIGURES 2, 3 and 6, the absorption zone 10 of the reinforcement system 5 comprises a front absorption block 25, a rear absorption block 26, a first absorption block 27, a second absorption block 28 and a third absorption block 29.

[0072] [Fig. 3] shows that the front absorption block 25 is located in the extension of the front ribbed reinforcement member 14 at the front part 7 of the floor 3. The rear absorption block 26 is located in the extension of the rear ribbed reinforcement member 15 at the rear part 8 of the floor 3. The first absorption block 27 is located in the extension of the first intermediate ribbed reinforcement member 16. The second absorption block 28 is located in the extension of the second intermediate ribbed reinforcement member 17. The third absorption block 29 is located in the extension of the third intermediate ribbed reinforcement member 18.

[0073] With reference to FIGURES 2, 3 and 6, the first absorption block 27 and the second absorption block 28 are identical in shape, dimension and from the point of view of their mechanical properties, in particular in their capacity to deform. The front absorption block 25 and the rear absorption block 26 are identical in shape, dimension and from the point of view of their mechanical properties, in particular in their capacity to deform. The front absorption block 25 and the rear absorption block 26 are different from the first absorption block 27 and the second absorption block 28, in shape, dimension and from the point of view of their mechanical properties, in particular in their capacity to deform. The third absorption block 29 is different from all the other absorption blocks, in shape, dimension and from the point of view of its mechanical properties, in particular in its capacity to deform.

[0074] In the reinforcement system 5 according to the invention illustrated in [Fig.4], the upper plate 9 comprises fixing members 30 to the floor 3 formed of four orifices 31.

[0075] In the reinforcement system 5 according to the invention illustrated in [Fig.4], the absorption blocks 25, 26, 27, 28, 29, in particular the third absorption block 29 visible in the section, and the ribbed members 14, 15, 16, 17, 18, in particular the third intermediate reinforcing ribbed member 18 in the section, are integral with the upper plate 9.

[0076] In the reinforcement system 5 according to the invention illustrated in [Fig.4], the reinforcement zone 11 is integral with the upper plate 9 and extends longitudinally in the extension of the absorption zone 10. The ribbed members 14, 15, 16, 17, 18 extend longitudinally from the absorption zone 10 in the direction of an opposite edge 19 of the upper plate 9.

[0077] [Fig. 5] shows that the ribbed members 14, 15, 16, 17, 18 extend in projection from a lower face 32 of the upper plate 9 in the vertical direction, the lower face 32 being opposite an upper face 33 of the upper plate 9. The ribs 100 of the front reinforcing ribbed member 14, the ribs 100 of the rear reinforcing ribbed member 15 and the ribs 100 of the third intermediate reinforcing ribbed member 18 have an identical profile. The first intermediate reinforcing ribbed member 16 and the second intermediate reinforcing ribbed member 17 have an identical profile. The first intermediate reinforcing ribbed member 16 and the second intermediate reinforcing ribbed member 17 comprise two types of ribs 200, 300, namely two adjacent intermediate ribs 200 between two adjacent front ribs 300 and two adjacent rear ribs 300.The intermediate adjacent ribs 200 have a free edge 201 between a free edge 301 of the front adjacent ribs 300 and a free edge 101 of the ribs 100 of the front reinforcing ribbed member 14.

[0078] In summary, the invention relates to a reinforcement system 5 for the floor 3 of a motor vehicle 1, the reinforcement system 5 comprising an upper plate 9 comprising fixing members 30 to the floor 3, a shock absorption zone 10 and a reinforcement zone 11. The absorption zone 10 is integral with the upper plate 9 and is configured to be able to deform at constant force under the effect of an impact. The reinforcement zone 11 is rigid, is configured to be able to transmit a compressive force following the impact, is integral with the upper plate 9 and extends longitudinally in the extension of the absorption zone 10.

[0079] Of course, the invention is not limited to the examples which have just been described and numerous adjustments can be made to these examples without departing from the scope of the invention. In particular, the different characteristics, forms, variants and embodiments of the invention can be associated with each other in various combinations insofar as they are not incompatible or mutually exclusive. In particular, all the variants and embodiments described above can be combined with each other.

Claims

Claims

1. Reinforcement system (5) for floor (3) of motor vehicle (1), the reinforcement system (5) comprising: - an upper plate (9) comprising fixing members (30) to the floor (3); - a shock absorption zone (10) integral with the upper plate (9), the absorption zone (10) being configured to be able to deform at constant force under the effect of an impact; - a rigid reinforcement zone (11) configured to be able to transmit a compressive force following the impact, the reinforcement zone (11) being integral with the upper plate (9) and extending longitudinally in the extension of the absorption zone (10).

2. Reinforcement system (5) according to the preceding claim, in which the absorption zone (10) comprises at least one absorption block (25, 26, 27, 28, 29) configured to deform at constant force, each at least one absorption block (25, 26, 27, 28, 29) being integral with the upper plate (9).

3. Reinforcement system (5) according to the preceding claim, in which each absorption block (25, 26, 27, 28, 29) is formed from a honeycomb structure.

4. Reinforcement system (5) according to any one of the preceding claims, in which the rigid reinforcement zone (11) comprises at least one ribbed reinforcement member (14, 15, 16, 17, 18) integral with the upper plate (9), each ribbed member (14, 15, 16, 17, 18) extending projecting from the upper plate (9) and extending longitudinally from the absorption zone (10) and towards an opposite edge (19) of the upper plate (9).

5. Reinforcement system (5) according to the preceding claim, in which each ribbed member (14, 15, 16, 17, 18) comprises at least two ribs (100, 200, 300) extending parallel to each other and having a rectangular transverse profile.

6. Reinforcement system (5) according to the preceding claim, in which the at least one ribbed member (14, 15, 16, 17, 18) comprises at least one metal tube (400) housed between two adjacent ribs (100) of the ribbed member (14, 15, 16, 17, 18), each at least one metal tube (400) extending parallel to said ribs (100).

7. Arrangement (2) of floor (3) for motor vehicle (1), the arrangement (2) comprising: - a floor (3) reinforced by two seat crosspieces (4, 20) extending laterally from one edge (6) to the other of the floor (3); - a reinforcement system (5) according to any one of the preceding claims, the reinforcement system (5) being fixed integrally to the floor (3) at the level of said seat crosspieces (4, 20).

8. Arrangement (2) of floor (3) according to the preceding claim, in which the reinforcement zone (11) of the reinforcement system (5) comprises: - a front ribbed reinforcement member (14) which extends longitudinally in front of a front seat crossmember (4); - a rear ribbed reinforcement member (15) which extends longitudinally behind a rear seat crossmember (20); - a first intermediate ribbed reinforcement member (16) which extends between two end portions (21, 22) of the front seat crossmember (4); - a second intermediate ribbed reinforcement member (17) which extends between two end portions (23, 24) of the rear seat crossmember (20); - a third intermediate ribbed reinforcement member (18) located between the rear seat cross member (20) and the front seat cross member (4).

9. Arrangement (2) of floor (3) according to the preceding claim, in which the absorption zone (10) of the reinforcement system (5) comprises: - a front absorption block (25) located in the extension of the front ribbed reinforcement member (14) at a front part (7) of the floor (3); - a rear absorption block (26) located in the extension of the rear ribbed reinforcement member (15) at a rear part (8) of the floor (3); - a first absorption block (27) located in the extension of the first intermediate ribbed reinforcement member (16); - a second absorption block (28) located in the extension of the second intermediate ribbed reinforcement member (17); - a third absorption block (29) located in the extension of the third intermediate ribbed reinforcement member (18).

10. Motor vehicle (1) comprising a floor (3) arrangement (2) according to any one of claims 7 to 9.

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