Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
  • B62D25/20—Floors or bottom sub-units

Definitions

• Certain vehicles generally of the automobile type, include a base comprising a lower floor and two upper floors.
• the lower floor may comprise on its upper face longitudinal walls and an upper wall which together define an open tunnel in a central longitudinal zone, and two projecting lateral zones, placed to the right and left of the tunnel being separated of the latter by empty areas, and the upper floors are installed respectively on the side areas of the lower floor.
• These side areas and the associated upper floors are arranged to support front, right and left seats.
• these projecting side areas are generally defined in order to allow the accommodation under the lower floor of at least one rechargeable battery.
• the vehicle undergoes an impact on one of its longitudinal sides at the level of a lateral zone of the upper floor, the fact that the latter is protruding (and therefore that the upper floor is raised) allows the neighboring spar to exert pressure on it, which pushes it against the longitudinal wall of the tunnel and therefore can induce punching and/or destabilization of this tunnel, which is potentially dangerous for the integrity of the vehicle.
• the situation is aggravated when the upper floor includes seat sleepers because they contribute to punching and/or destabilization of the tunnel.
• the invention therefore aims in particular to improve the situation.
• a lower floor comprising on an upper face longitudinal walls and an upper wall defining a tunnel in a central longitudinal zone, and two projecting lateral zones, placed to the right and left of the tunnel, separated from it by empty areas, and suitable for supporting front seats, and
• This reinforcing part is characterized by the fact that it has a generally L-shaped cross section and is suitable for being installed in one of the empty zones by having a first wall fixedly secured to one of the walls longitudinal and a second wall fixedly secured to a lower face of the upper floor, to reinforce a local transverse stiffness of the base and to oppose a sagging of a part of the lateral zone located next to this empty zone in the event of an impact suffered by the vehicle.
• the invention in the event of an impact suffered by the vehicle on a longitudinal side, the central longitudinal zone of its base is protected, thus making it possible to preserve its integrity, and in the event of an impact suffered by the front of the vehicle the forward tilt of the front seat is strongly limited, or even prevented completely, which prevents the sagging of the lateral area and therefore damage to a possible battery installed under the latter.
• the reinforcing part according to the invention may include other characteristics which can be taken separately or in combination, and in particular:
• its second wall may include a stamped zone defining a concave space
• the concave space can extend longitudinally, parallel to the central longitudinal zone
• the second wall can comprise a longitudinal edge which is able to be fixedly joined by welding to the underside of the upper floor;
• the concave space can have the shape of a rectangular bowl being delimited on three sides closed respectively by three sub-parts of the second wall and on one side partially open, intended to be oriented towards the tunnel, by an extension towards the bottom of the first wall;
• the three sub-parts can have an upper end folded so as to define an edge suitable for being fixedly joined by welding to the underside of the upper floor;
• the invention also proposes a motor vehicle comprising a base comprising, on the one hand, a lower floor comprising on an upper face longitudinal walls and an upper wall defining a tunnel in a central longitudinal zone, and two lateral zones in projection, placed to the right and left of the tunnel being separated from the latter by empty areas suitable for supporting front seats, and two upper floors installed respectively on the lateral areas, and, on the other hand, at least one piece reinforcement, right or left, of the type presented above, and fixedly attached to one of the longitudinal walls and to a lower face of one of the upper floors.
• one (each) upper floor may comprise an internal longitudinal edge extending longitudinally to the right or left of the tunnel and folded upwards in order to be fixedly secured by welding to one of the reinforcing pieces .
• FIG. 1 schematically illustrates, in a perspective view of the left longitudinal side, a part of a first example of the base of a motor vehicle, comprising a first example of production of a reinforcing part according to the invention and an upper floor,
• FIG. 2 schematically illustrates, in a perspective view, the base part of Figure 1, without the upper floor,
• FIG. 3 schematically illustrates, in a sectional view in a transverse and vertical plane, the base part of Figure 1,
• FIG. 4 schematically illustrates, in a perspective view from above, the reinforcing part of Figures 1 to 3,
• FIG. 5 schematically illustrates, in a perspective view of the left longitudinal side, a part of a second example of the base of a motor vehicle, comprising a second example of production of a reinforcing part according to the invention and an upper floor,
• FIG. 6 schematically illustrates, in a perspective view, the base part of Figure 5, without the upper floor
• FIG. 7 schematically illustrates, in a perspective view, the reinforcement piece of Figures 5 and 6, fixedly attached to the left longitudinal wall of the base tunnel, in the absence of the left crosspiece,
• FIG. 8 schematically illustrates, in a perspective view, the reinforcing piece of Figures 5 to 7, fixedly attached to the left longitudinal wall of the base tunnel and to the left crosspiece
• FIG. 9 schematically illustrates, in a sectional view in a transverse and vertical plane, the base part of Figure 5.
• the invention aims in particular to propose a reinforcing part PR allowing an SV base of a motor vehicle to better absorb forces during an impact suffered by the latter.
• the reinforcing part PR is intended to be part of a car-type motor vehicle. But the invention is not limited to this type of motor vehicle. It concerns any motor vehicle comprising a structure comprising a base comprising a longitudinal tunnel in a central part and upper floors installed above a lower floor.
• the direction perpendicular to the longitudinal direction X, and the Z direction is the vertical direction of the vehicle, which is perpendicular to the longitudinal X and transverse Y directions.
• front is defined in relation to the front end of the vehicle
• rear is defined in relation to the rear end of the vehicle ( opposite the front end). Therefore, the front part of an element is (intended to be) oriented towards the front end of the vehicle, while the rear part of that element is (intended to be) oriented towards the rear end of the vehicle.
• first example of SV base is adapted to front seats with so-called low seating
• second example of SV base is adapted to front seats with so-called high seating.
• each base SV comprises a lower floor PI, at least one upper floor PLS, and at least one reinforcement piece PR.
• the lower floor PI comprises on an upper face FS a central longitudinal zone ZLC and two projecting lateral zones ZLS.
• the central longitudinal zone ZLC comprises longitudinal walls PLT (right and left) and an upper wall PST which together define a tunnel open on its lower face (oriented downwards).
• the two lateral zones ZLS are placed to the right and left of the tunnel, being separated from the latter by empty zones ZV.
• these two ZLS side zones are suitable for supporting front seats. They each comprise for this purpose convex stamped parts and/or longitudinal and/or transverse elements which extend upwards from the upper face FS of the lower floor PL
• At least one of these lateral zones ZLS can be arranged (projecting) so as to allow the accommodation under the lower floor PI of a rechargeable battery.
• the (each) upper floor PLS is installed on one of the lateral zones ZLS, and therefore above the lower floor PI. It is intended to allow the attachment of a front seat on its upper side.
• the (each) reinforcing piece PR has a cross section (in a transverse (Y) and vertical (Z) plane) in the general shape of L.
• the (each) reinforcing piece PR is capable of being installed in one of the empty zones ZV by having a first wall P1 fixedly secured to one of the longitudinal walls PLT and a second wall P2 fixedly secured (at least ) on the lower face Fl of the upper floor PLS.
• these fixed connections can be done by welding. But they could also be done by screwing (or bolting).
• This arrangement is intended to reinforce the local transverse stiffness (in the transverse direction Y) of the base SV and to oppose a subsidence of a part of the lateral zone ZLS located next to this empty zone ZV in the event of shock suffered by the vehicle. This helps reinforce the passive safety of the vehicle.
• the base SV can comprise two crosspieces TS, right and left, each installed between a longitudinal member LS (located on a right or left longitudinal side). left) and the first wall P1 of a right or left PR reinforcement piece or the right or left PLT side wall of the tunnel (in the absence of a PR reinforcement piece).
• the second wall P2 of a reinforcing piece PR can also be secured to the lower face of the upper wall of a corresponding crosspiece TS.
• this fixed connection can be done by welding. But it could also be done by screwing (or bolting).
• the upper floor PLS which is associated with a reinforcing piece PR, can include an internal longitudinal edge Bl extending longitudinally at right or left of the tunnel, folded upwards and fixedly secured by welding to the first wall P1 of this reinforcing part PR. This makes it possible to join the upper floor PLS to the longitudinal wall PLT of the tunnel via the reinforcement piece PR, and thus to increase the quality of the anchoring of the front seat concerned on the SV base.
• the second wall P2 of the (each) reinforcing part PR can comprise a stamped zone ZE which defines a concave space EC. This stamping is intended, at least, to reinforce the force-withstanding capacity of the PR reinforcement part in the event of an impact.
• the concave space EC can extend longitudinally (in the direction longitudinal zone lateral.
• the second wall P2 of the (each) reinforcing piece PR can comprise a longitudinal edge BL which is able to be fixedly secured by welding to the face lower Fl of the upper floor PLS. It will be understood that this longitudinal edge BL is folded in a substantially horizontal plane (XY). This makes it possible to increase the connection surface between the second wall P2 and the upper floor PLS, and therefore to have a better distribution of the forces absorbed in the event of an impact. In addition, this makes it possible to optimize the integrity of at least the longitudinal positioning of the PR reinforcement piece.
• the first embodiment illustrated in Figures 2 to 4 results from stamping and cutting operations, as well as possibly folding.
• the second wall P2 can comprise on a front “transverse” edge a coupling tab PC folded downwards (but this could be upwards) and intended to be fixedly secured by welding to the rear face of the transverse wall of an associated TS crosspiece. This increases the integrity of the longitudinal and transverse positioning of the PR reinforcement piece.
• the concave space EC can, as illustrated non-limitatively and at least partially in Figures 6 to 9, have the shape of a rectangular bowl.
• the concave space EC is delimited on three closed sides respectively by three sub-parts of the second wall P2 of its reinforcing piece PR and on a partially open side, intended to be oriented towards the tunnel, by an extension down the first wall P1 of its reinforcement piece PR.
• the concave space EC could be delimited on four closed sides respectively by four sub-parts of the second wall P2 of its reinforcing piece PR which extend from each other, substantially at 90°.
• This variant is currently technically feasible when the reinforcing part PR is manufactured by molding, while the second embodiment illustrated in Figures 6 to 9 results from cutting and stamping operations, as well as possibly folding. It will in fact be understood that stamping is very difficult to compatible with the definition of a concave space EC delimited on four closed sides respectively by four sub-parts of the second wall P2.
• the three (or four) sub-parts of the second wall P2 can each have an upper end which is folded so as to define an edge BS suitable for being fixedly joined by welding to the lower face Fl of the upper floor PLS. It will be understood that this edge BS is folded in a substantially horizontal plane (XY). This makes it possible to increase the connection surface between the second wall P2 and the upper floor PLS, and therefore to have a better distribution of the forces absorbed in the event of an impact.
• each PR reinforcement piece can be made from a chosen steel, for example that called DP590.
• each piece of reinforcement PR can, for example and preferably, have a thickness of between 1 mm and 2 mm. For example, this thickness can be equal to 1.3 mm.
• the SV base can include two reinforcement pieces PR, right and left, each fixedly attached to one of the longitudinal walls PLT of the tunnel and to a lower face

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Body Structure For Vehicles (AREA)

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Publications (1)

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ID=85936869

Family Applications (1)

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• 2023
  • 2023-01-05 FR FR2300117A patent/FR3144800A1/fr active Pending
  • 2023-12-04 WO PCT/FR2023/051913 patent/WO2024146986A1/fr not_active Ceased
  • 2023-12-04 EP EP23834259.6A patent/EP4646358A1/de active Pending

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