Frontal shock absorber for the structure of a three-wheeled electric vehicle

Abstract

The invention relates to a three-wheeled motor vehicle structure (12), of the tricycle type. The structure (12) comprises: a front cab (24); a steering column tube (22) for receiving a central front wheel (20); a mounting area (30) for an electric battery (14); a subframe (32) with a front crossmember (34) having a front surface (44) and a rear surface (46); and a central longitudinal member (48) extending longitudinally rearward from the rear surface of the front crossmember (34). The structure (12) further comprises a shock-absorbing device (40) configured to deform by absorbing energy; the shock-absorbing device (40) being transverse to the central longitudinal member (48) and extending forward from the front surface to cooperate with the central front wheel (20) in the event of a frontal collision. Figure to be published with the abstract: Figure 2

Description

Title of the invention: Frontal shock absorber for the structure of a three-wheeled electric vehicle

[0001] The invention deals with the frontal collision of a three-wheeled motor vehicle. The invention relates to the protection of an electric battery integrated into the structure of a motor vehicle with a front central wheel. More specifically, the invention relates to a motor vehicle structure. The invention also relates to a motor vehicle.

[0002] A three-wheeled motor vehicle generally has a central front wheel. Such a vehicle is usually compact, with a front cab attached to a rear cargo platform. Thanks to its small size and turning radius, the vehicle is particularly well-suited for deliveries in densely populated urban areas. Its weight and compactness facilitate movement on congested roads. Such a motor vehicle is generally referred to as a "tricycle."

[0003] To limit greenhouse gas emissions, the motor vehicle is equipped with an electric battery powering an electric propulsion motor coupled to the rear axle. To extend the vehicle's range, the volume of the electric battery is increased, resulting in a significant amount of space within the structure. This volume, combined with the vehicle's compact dimensions, makes it susceptible to physical damage in the event of a frontal collision.

[0004] Document CN206255138U presents a chassis for a small transport vehicle. The chassis is suitable for heavy loads. The transport vehicle includes a front bumper, a left front camber beam, a right front camber beam, a rear flat frame, and a beam. The rear flat frame includes a side member. The side member comprises two parallel members, a front beam, a rear frame element, a rear web beam, and an enhanced side member. The structure of this frame can effectively prevent bumper deformation, thus protecting the driver and improving the vehicle's load-carrying capacity.

[0005] US patent 20090255747A1 describes an electric vehicle with a modular frame comprising a main chassis with a standing riding platform, a front fork / wheel assembly, a handlebar assembly, and a rear swingarm assembly with left and right rear wheels. The front fork assembly bolts to the main chassis. The handlebar assembly attaches to the pivoting steering tube of the front fork assembly. The swingarm assembly bolts to the main chassis and pivots to provide rear suspension for the vehicle. The swingarm Includes a stabilizer bar connecting the right and left trailing arms. The electronic control units are integral to the main chassis and are structural components of the vehicle. The battery can be installed or removed from the main chassis using a manually activated latch. The electronics plate contains the traction system electronics and is removable from the main chassis. The handlebar assembly includes a folding mechanism.

[0006] Document CN210592277U describes a tricycle chassis frame for mounting a battery pack. The tricycle chassis frame comprises a frame and a platform. The frame includes longitudinal beams on both sides, a front crossbeam, a rear crossbeam, and a central crossbeam, thus creating a space for installing the battery pack. A support structure is arranged between the longitudinal beams of the tricycle frame. This provides effective support through the connection of the battery pack and the tricycle frame. The installation space for the battery pack is increased, and the tricycle's range is considerably extended. The battery pack is particularly well-suited for quick and easy replacement. The battery pack is protected by the frame and the platform, thereby reducing the likelihood of collision damage to the battery pack mounted on the tricycle chassis.

[0007] However, in the event of a frontal collision, the front center wheel is pushed backward by the obstacle. As it moves backward, this same wheel in turn pushes against the central chassis rail. The central rail is likely to come into contact with the electric battery and thus damage it. This central rail is also likely to split due to the energy passing through it. Each of its parts becomes hazardous to the passenger compartment and the driver. In particular, the broken rail risks damaging the electric battery or other functional components of the motor vehicle.

[0008] The invention aims to address at least one of the problems or drawbacks encountered in the prior art. In particular, the invention aims to improve the safety of a front-wheel-drive motor vehicle structure. The invention also aims to optimize the assembly and safety of an electric motor vehicle with a front-wheel drive.

[0009] According to a first aspect, the invention proposes a three-wheeled motor vehicle structure; the structure comprising: a front cab; a steering column tube for receiving a central front wheel; an electric battery mounting area; a subframe with a front crossmember having a front surface and a rear surface; a central longitudinal member extending longitudinally rearward from the rear surface of the front crossmember; remarkable in that the structure further comprises a shock-absorbing device configured to deform by absorbing energy; the shock-absorbing device being transverse at the level of the central longitudinal member extending forward of the front surface in order to cooperate with the central front wheel in the event of a frontal collision.

[0010] The absorption device acts as a fuse, reducing the collision energy reaching the central side member. This decreases the probability of deformation and breakage of the latter. Similarly, the front crossmember is protected. Thus, the vehicle's equipment is protected, as is the driver. In this way, the invention improves safety in several ways.

[0011] Preferably, the shock absorption device comprises two lateral wings for attachment to the front crossmember.

[0012] Preferably, the side mounting wings are inclined relative to the central spar at an angle of inclination between 15° and 60°.

[0013] Preferably, the absorption device comprises a central box.

[0014] Preferably, the absorption device comprises a recess with at least a longitudinal blade.

[0015] Preferably, the structure comprises a central post extending vertically from the central longitudinal member to the steering column tube.

[0016] Preferably, the central post extends vertically from the front cross member.

[0017] Preferably, the structure further comprises a front plate between the central post and the absorption device.

[0018] Preferably, the absorption device is metallic.

[0019] Preferably, the mounting area is in the front cabin.

[0020] Preferably, the subframe comprises two lateral stringers; the central stringer being between the two lateral stringers.

[0021] Preferably, the mounting area is above the central spar and / or the central spar extends longitudinally along the mounting area.

[0022] Preferably, behind the front cab, the structure includes a loading platform, the absorption device being vertically at a distance from the loading platform.

[0023] Preferably, the tube for the steering column is in the front cabin.

[0024] Preferably, the loading platform is a rear loading platform.

[0025] Preferably, the central box has a hexagonal shape.

[0026] Preferably, the shock absorption device extends forward from the front surface.

[0027] Preferably, the absorption device comprises a central part centered on the central spar.

[0028] Preferably, the structure includes a front plate between the central post and the absorption device.

[0029] Preferably, the absorption device comprises at least one longitudinal blade.

[0030] Preferably, each longitudinal blade is in the central box.

[0031] Preferably, the front cross member is continuous over the width of the underbody.

[0032] Preferably, the central longitudinal member has a rear end, with the electric battery being longitudinally at the rear end.

[0033] According to another aspect, the invention proposes a three-wheeled motor vehicle structure; the structure comprising: a front cab; a steering column tube intended to receive a central front wheel; an electric battery mounting area; a subframe with a front crossmember having a front surface, a rear surface; a central longitudinal member extending longitudinally towards the rear from the rear surface of the front crossmember; remarkable in that the structure further comprises a shock absorption device transversely at the level of the central longitudinal member and extending forward of the front surface.

[0034] According to another aspect, the invention proposes a three-wheeled motor vehicle structure; the structure comprising: a rear cargo platform; a front cab including a central tube for the steering column; a chassis with a front crossmember having a front surface and a rear surface; a central longitudinal member extending longitudinally rearward from the rear surface of the front crossmember; notable in that the structure further comprises a shock-absorbing device arranged transversely at the level of the central longitudinal member and fixed to the front surface of the front crossmember in order to cooperate with a central front wheel connected to the central steering column tube in the event of a frontal collision. The energy-absorbing device limits the mechanical stresses applied to the central longitudinal member, thus preventing its breakage. The impact energy it transmits to the underbody is reduced. The impact potential of the central longitudinal member decreases.

[0035] According to another aspect, the invention proposes a motor vehicle comprising a structure; remarkable in that the structure conforms to the invention.

[0036] Preferably, the motor vehicle includes a rear axle, an electric motor for driving the rear axle, an electric battery in the mounting area and adapted to power the electric motor, the front cabin includes a driver's seat above the electric battery.

[0037] Preferably, the front central wheel comprises a first width, the absorption device comprises a second width greater than or equal to the first width.

[0038] Each feature introduced by the expression "preferably" given in relation to one of the aspects of the invention applies to all other aspects of the invention.

[0039] The invention will be well understood and other aspects and advantages will become clear upon reading the following description, given with reference to the attached figures listed below.

[0040] Fig. 1 is a side view of a motor vehicle according to the invention.

[0041] Figure 2 shows a front portion of a motor vehicle structure according to the invention.

[0042] Fig. 3 is a view from below of a motor vehicle structure underbody according to the invention.

[0043] Figure 4 represents a shock absorption device for the structure of a motor vehicle according to the invention.

[0044] In the following description, the term "include" is synonymous with "include" and is not limiting in that it permits the presence of other elements in the motor vehicle or the structure to which it relates. It is understood that the term "include" includes the terms "consist of". The terms "external" and "internal" shall respectively designate what is oriented towards the outside of the vehicle and towards the inside of the vehicle.

[0045] In this description, the terms "longitudinal," "longitudinally," "transverse," and "transversely" are used with respect to the vehicle's frame of reference in the mounting configuration. The term "longitudinal" refers to the principal direction of travel of the vehicle. The term "transverse" refers to a direction perpendicular to the principal direction of travel of the vehicle. The term "front" refers to the principal direction of travel of the vehicle. The term "rear" refers to the opposite of the front of the vehicle.

[0046] The X-axis represents the longitudinal direction, the Y-axis represents the transverse direction, and the Z-axis represents the vertical direction of the motor vehicle. These three axes define a right-handed trihedron whose orientation is preserved throughout the figures.

[0047] In this description, the ranges of values ​​include the bounds that delimit them.

[0048] In the present description, equality between values ​​is not to be understood in the strict sense insofar as each equality allows a variation of at most 10%, preferably at most 5%, more preferably at most 2%, between these values.

[0049] In this description, the terms "vertical" and "horizontal" are not to be understood in their strict sense. Indeed, they allow an inclination of at most 20°, preferably at most 10°, more preferably at most 5°, and even more preferably at most 2°; with respect to the strict meaning of these terms.

[0050] In this description, the technical characteristics are defined in the mounting configuration of the structure, unless otherwise explicitly stated.

[0051] Throughout the description, the different figures use the same reference signs to designate identical or similar entities.

[0052] Figure 1 represents a motor vehicle 10, according to an embodiment of the invention. The motor vehicle 10 comprises a structure 12 carrying an electric battery 14 and at least one electric motor 16 adapted to drive said motor vehicle 10. The electric motor 16 is associated with a rear axle 18 of the motor vehicle 10.

[0053] The motor vehicle 10 is a three-wheeled vehicle (represented by their rims), one of which is a front wheel. The front wheel is a central front wheel 20. It is a steering wheel. It is mounted to pivot about a pivot axis 42, also called the steering axis. It is connected via a suspension system to a steering column tube 22 76, which is integral with the structure 12. The tube 22 is a central tube. The steering column 76 forms a spindle mounted to rotate within the tube 22. The structure 12 forms the main frame of the motor vehicle. The structure 12 is formed from an assembly of bent tubes and stamped sheet metal welded together.

[0054] The structure 12 comprises: a front cabin 24 in which the steering column tube 22 is arranged, and a flat, horizontal loading platform 26. The front cabin 24 forms a passenger compartment, also referred to as the driver's compartment. It has a driver's seat 28 above the electric battery 14. The loading platform 26 defines a rear compartment.

[0055] The electric battery 14 is housed in a mounting area 30, which is itself housed in the front cab 24. Optionally, the electric battery 14 extends beyond the front cab 24. The mounting area 30 can optionally accommodate other equipment. It is delimited by a housing that serves as a support for the driver's seat 28.

[0056] The structure 12 includes a subframe 32. The subframe 32 forms the lower part of the structure 12. The subframe 32 faces the ground. The subframe 32 includes a front crossmember 34. It includes a central longitudinal member and two lateral longitudinal members 36 extending longitudinally rearward from the front crossmember 34. The lateral longitudinal members 36 extend from the front cab 24 to the rear axle 18. The structure 12 includes a central post 38 extending vertically from the central longitudinal member to the steering column tube 22.

[0057] The structure 12 further comprises a shock-absorbing device 40 configured to deform by absorbing energy. It stores and dissipates the energy of the shock. The shock-absorbing device 40 then deforms plastically. The device The impact energy absorption device 40 is transversely centered on the central side member. It is located in its forward extension. The absorption device 40 extends forward of the front crossmember 34 to cooperate with the front center wheel 20 in the event of a frontal collision. Indeed, in the event of a frontal collision against a fixed obstacle at a speed of at least 30 km / h, or at least 50 km / h, the suspension system deforms. The front center wheel 20 tends to move closer to the underbody 32. The absorption device 40 helps control this movement. Despite the tire's flexibility, the rim remains aggressive depending on the collision speed.

[0058] According to one embodiment, the loading platform has at least one passenger seat.

[0059] The motor vehicle can, for example, be a private motor vehicle or a commercial motor vehicle.

[0060] Figure 2 shows a front half of the structure 12 of a motor vehicle, according to an embodiment of the invention. The motor vehicle may correspond to the one shown in relation to Figure 1.

[0061] The structure 12 has a front cab 24 in front of a loading platform 26. The steering column tube 22 overhangs the front central wheel 20. The tube 22 defines a pivot axis 42, generally vertical. The steering column tube 22 is generally a central tube. The tube 22 extends at least partially into the front cab 24. The front cab 24 incorporates at least partially a mounting area 30 for an electric battery 14. The mounting area 30 is above the underbody 32. The electric battery is under the driver's seat (not shown).

[0062] The underbody 32 comprises a front crossmember 34 having a front surface 44 and a rear surface 46; a central longitudinal member 48 extending longitudinally rearward from the rear surface 46 of the front crossmember 34. The central longitudinal member 48 is transversely spaced from the side longitudinal members 36. They are connected via the front crossmember 34. Below the front cab 24, the central longitudinal member 48 is located between the two side longitudinal members 36. The mounting area 30 is above the side longitudinal members 36.

[0063] The structure 12 further includes a shock-absorbing device 40 configured to deform by absorbing energy. The absorption device 40 is transverse to the central side member 48 and extends forward of the front surface 44. It points towards the front central wheel 20. Thus, in the event of a frontal collision, it butts against the latter and limits the deformations of the structure 12. In particular, it prevents the impact energy from being transmitted from the front central wheel 20 to the central side member 48, which in turn could potentially redirect this mechanical energy back to the electric battery 14. Therefore, the risk of damage to the battery in the event of a frontal collision is reduced. Furthermore, the absorption device 40 contains The risk of the front center wheel 20 intruding into the front cab 24 is reduced; this protects the driver. The risk of leg injuries is also reduced.

[0064] The structure 12 includes a central post 38 extending vertically from the central side member 48 to the steering column tube 22. The central post 38 extends vertically from the front crossmember 34. It connects the central side member 48 to the front crossmember 34. The central post 38 physically connects the central side member 48 to the tube 22. The structure 12 also includes roll bars 70 delimiting the front cab 24. They define a protective cell around the driver. The absorption device 40 is located at a distance from the roll bars 70.

[0065] The structure 12 includes, in addition, a front plate 50. The front plate 50 is vertical. The front plate 50 is longitudinally positioned between the central post 38 and the shock-absorbing device 40. The front plate 50 is also positioned between the central post 38 and the shock-absorbing device 40. It forms an intermediate section. It extends vertically at the level of the front crossmember 34 and the central post 38. The shock-absorbing device 40 abuts longitudinally against it. The front plate 50 includes vertical stiffening ribs. The extended surface area of ​​the front plate 50 allows for the distribution of the forces transmitted by the shock-absorbing device 40. This stiffens the structure 12 and protects the front crossmember 34 during a frontal collision.

[0066] Behind the front cab 24, the structure 12 includes a loading platform 26, such as a rear loading platform. The absorption device 40 is vertically positioned at a distance from the loading platform 26. The loading platform 26 is vertically positioned between the tube 22 and the absorption device 40.

[0067] Figure 3 shows a plan view, from below, of a motor vehicle structure 12, according to an embodiment of the invention. The motor vehicle may correspond to the one shown in relation to one of Figures 1 to 2. The central front wheel 20 is a steering wheel. The central front wheel 20 is shown as straight, that is to say, it allows the motor vehicle to move forward in a straight line. Its equatorial plane is parallel to the longitudinal direction of the motor vehicle.

[0068] The structure 12 is equipped with a front plate 50 between the front cross member 34 and the absorption device 40. The front plate 50 forms a shield. It has a thickness of at least 0.65 mm, preferably at least 1.00 mm. The central longitudinal member 48 extends longitudinally along the mounting area 30; partially or totally.

[0069] Transverse beams 52 connect the central longitudinal member 48 to the lateral longitudinal members 36. The transverse beams 52 are auxiliary cross members. They are located in front of the mounting area 30 in order to reinforce the structure 12 with respect to the mass of the electric battery (not shown). The front cross member 34 is continuous across its width of the subframe 32. It physically connects the lateral stringers 36. It is a single piece. Thus, it resists impacts and maintains the cohesion of the structure 12.

[0070] The shock absorption device 40 is symmetrical. It extends forward from the front surface 44. The shock absorption device 40 includes two lateral mounting wings 54 to the front crossmember 34. The lateral mounting wings 54 stabilize the shock absorption device 40 relative to the underbody 32. This aspect takes into account the fact that the front center wheel 20 is likely to strike the shock absorption device 40 when at an angle, since it is a steering wheel.

[0071] The side mounting wings 54 are inclined relative to the central longitudinal member 48 at an angle of inclination 56 of between 15° and 60°, preferably between 20° and 45°; more preferably between 25° and 35°. The angle of inclination 56 optimizes stability and mass. At the ends of the side mounting wings 54, the absorption device 40 comprises arms 58 welded to the front surface 44 of the front crossmember 34. The arms 58 are coplanar with the front plate 50.

[0072] According to one embodiment, the central longitudinal member 48 has a rear end 60. The electric battery (not shown) or at least its mounting area 30 is arranged longitudinally at the rear end 60.

[0073] The absorption device 40 comprises a central part centered on the central longitudinal member 48. The central part comprises a central box 62. The lateral mounting wings 54 extend laterally from the central box 62; towards the rear. The central box 62 is hollow.

[0074] The front crossmember 34, the side rails 36, and the central rail 48 comprise profiles, for example rectangular ones. Each profile has a wall forming the profile. The profile walls have a first thickness; the front plate 50 has a second thickness greater than the first thickness.

[0075] The front center wheel 20 has a first width 72. The shock absorber has a second width 74 greater than or equal to the first width 72. The widths can be maximum widths. The second width 74 is measured at the rear ends of the side mounting wings 54. The second width corresponds to the width of the portion of the shock absorber 40 that is at a distance from the front crossmember 34; therefore, the portion suitable for cooperating with the front center wheel 20. The differences in width improve the shock energy absorption capacity.

[0076] Figure 4 shows a shock absorption device 40 for a motor vehicle structure, according to an embodiment of the invention. The motor vehicle may correspond to the one shown in relation to one of Figures 1 to 3.

[0077] The shock absorption device 40 comprises two lateral mounting wings 54 to the front crossmember (not shown). The lateral mounting wings 54 form struts. The side mounting wings 54 are inclined relative to each other and at an angle to the central side member (not shown). They define an angle of inclination 56 with respect to a longitudinal axis 64 of the motor vehicle. The angle of inclination 56 is between 15° and 60°. The longitudinal axis 64 is parallel to the central side member. The arms 58 extend in opposite directions from each other.

[0078] The absorption device 40 includes a central box 62 between the side mounting wings 54. The central box 62 forms a hollow body. It forms a shell. The absorption device 40 includes a recess 66 with at least one longitudinal blade 68. The recess 66 is closed by a front partition to improve the transmission of forces from the front central wheel.

[0079] In this case, the absorption device 40 comprises at least three longitudinal blades 68. Each longitudinal blade 68 compartmentalizes the recess 66. The longitudinal blades 68 are angularly distributed. They are planar. The longitudinal blades 68 contribute to the energy absorption of the absorption device 40.

[0080] The longitudinal blades 68 reinforce the absorption device 40 and guide its deformation during a collision. This core reinforcement is particularly useful when the front center wheel is rotated relative to its straight-ahead orientation. Thus, the absorption device 40 protects the underbody for various steering system orientations, and especially for the front center wheel.

[0081] In the present embodiment, the central box 62 has a hexagonal shape. However, it can have any other shape, such as square, round, or triangular. The hexagonal shape facilitates the installation of the lateral mounting flanges 54.

[0082] The shape of the central box 62, the material, the thickness, the number of longitudinal blades inside are adapted according to the energy used in the event of an impact.

[0083] According to one embodiment, the shock-absorbing device is metallic. It is made of steel, aluminum, or copper. It can be heat-treated to optimize its behavior during the collision kinematics.

[0084] According to one embodiment, the shock-absorbing device is made of a plastic or composite material. The plastic material may include a thermoplastic or thermosetting material. According to a preferred embodiment, the plastic material is selected from the group comprising polypropylene, polyamide, polyphthalamide, polyetheretherketone, polyphenylene sulfide, polyamide-imide, polyetherimide, polyarylamide, polyepoxide, unsaturated polyester, vinyl ester, or polyester-vinylester resins. For example, the composite material comprises a matrix of a plastic material as described above with reinforcement. For example, the reinforcement comprises glass or carbon fibers.

[0085] The shock-absorbing device comprises at least 10% by weight of recycled plastic material based on the total weight of the plastic material; preferably from 10 to 80% by weight; more preferably from 20 to 60% by weight or from 30 to 40% by weight. The use of recycled plastic material reduces the vehicle's environmental footprint.

[0086] According to an alternative of the invention, the absorption device comprises a solid body.

[0087] According to one option or alternative of the invention, the absorption device comprises a foam block.

[0088] According to one option or alternative of the invention, the absorption device comprises fastening arms fixed to an upper surface and a lower surface of the front cross member.

[0089] The invention comprises the combination of all the embodiments illustrated by all the figures.

[0090] Figures 1, 2 and 4 are isometric views. They each respect a specific scale, real angles and real proportions.

Claims

Demands

1. Structure (12) of a three-wheeled motor vehicle (10); the structure (12) comprising: a front cab (24); a tube (22) for a steering column (76) intended to receive a front central wheel (20); a mounting area (30) for an electric battery (14); a subframe (32) with a front crossmember (34) having a front surface (44), a rear surface (46); a central longitudinal member (48) extending longitudinally rearward from the rear surface (46) of the front crossmember (34); characterized in that the structure (12) further comprises a shock-absorbing device (40) configured to deform by absorbing energy; the shock-absorbing device (40) being transverse to the central longitudinal member (48) and extending forward from the front surface (44) in order to cooperate with the front central wheel (20) in the event of a frontal collision.

2. Structure (12) according to claim 1, characterized in that the shock absorption device (40) comprises two lateral attachment wings (54) to the front cross member (34); preferably, the lateral attachment wings (54) are inclined relative to the central side member (48) at an angle of inclination (56) between 15° and 60°.

3. Structure (12) according to any one of claims 1 to 2, characterized in that the absorption device (40) comprises a central box (62); preferably, the absorption device (40) comprises a recess (66) with at least one longitudinal blade (68).

4. Structure (12) according to any one of claims 1 to 3, characterized in that the structure (12) comprises a central post (38) extending vertically from the central longitudinal member (48) to the tube (22) for steering column (76); preferably, the central post (38) extends vertically from the front cross member (34).

5. Structure (12) according to claim 4, characterized in that the structure (12) further comprises a front plate (50) between the central post (38) and the absorption device (40); preferably, the absorption device (40) is metallic.

6. Structure (12) according to any one of claims 1 to 5, characterized in that the mounting area (30) is in the front cabin (24); preferably, the underbody (32) comprises two longitudinal members lateral (36); the central spar (48) being between the two lateral spars (36).

7. Structure (12) according to any one of claims 1 to 6, characterized in that the mounting area (30) is above the central spar (48) and / or the central spar (48) extends longitudinally along the mounting area (30).

8. Structure (12) according to any one of claims 1 to 7, characterized in that behind the front cab (24), the structure (12) comprises a loading platform (26), the absorption device (40) being vertically at a distance from the loading platform (26).

9. Motor vehicle (10) comprising a structure (12); characterized in that the structure (12) conforms to any one of claims 1 to 8; preferably, the motor vehicle (10) comprises a rear axle (18), an electric motor (16) for driving the rear axle (18), an electric battery (14) in the mounting area (30) and adapted to power the electric motor (16), the front cabin (24) comprises a driver's seat (28) above the electric battery (14).

10. Motor vehicle (10) according to claim 9, characterized in that the central front wheel (20) comprises a first width (72), the absorption device (40) comprises a second width (74) greater than or equal to the first width (72).

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