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
  • B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
  • B62D25/2036—Floors or bottom sub-units in connection with other superstructure subunits the subunits being side panels, sills or pillars

Definitions

• TITLE MOTOR VEHICLE WITH FRONT FOOT REINFORCEMENT FOR FRONTAL IMPACT WITH LOW COVER
• the invention relates to the field of motor vehicles, and more particularly to the body structure of a motor vehicle.
• a motor vehicle comprises a body structure, with a floor and two longitudinal rocker beams positioned on either side, and laterally, on the floor. Each beam extends from a front leg of the vehicle to a rear leg.
• the published patent document FR 3038288 A1 discloses a motor vehicle floor with reinforcements which reduce deformation in the event of a side impact.
• This floor further comprises a central tunnel, the two reinforcements being positioned on each side of the central tunnel and parallel to the floor. But these reinforcements, in addition to being bulky, do not, due to their central position on the floor, improve the behavior of the vehicle during a frontal impact, especially at low overlap.
• the object of the invention is to overcome at least one of the drawbacks of the above-mentioned state of the art. More particularly, the invention aims to improve the behavior of a motor vehicle during a frontal impact with low coverage.
• the subject of the invention is a motor vehicle body structure comprising: a floor, and two longitudinal sill beams, on either side of the floor, each extending from a front foot to a rear foot , remarkable in that said body structure further comprises: a reinforcement forming a stamped section of L, fixed to the floor and to one of the two longitudinal sill beams, at the level of the front pillar.
• the L-shaped section of the stamping comprises a first wing fixed against the floor and a second wing fixed against the longitudinal sill beam.
• the first wing of the stamping has a length in a main horizontal direction perpendicular to a longitudinal direction of the vehicle which is greater than three times a length of the second wing in a vertical main direction perpendicular to the longitudinal direction.
• the longitudinal sill beam has a vertical side wall on one side of the interior of the vehicle, the second wing of the stamping being fixed against said wall.
• the L-shaped section of the stamping further comprises an intermediate portion inclined relative to each of the first and second wings.
• the reinforcement has at least one stiffening rib.
• At least one stiffening rib extends continuously from the first wing to the second wing.
• the L-section stamping is fixed by screwing.
• the longitudinal sill beam comprises a curved wall forming the front foot, the reinforcement being located in line with said curved wall.
• the reinforcement is located on a lateral side corresponding to the driving position of the vehicle.
• the measures of the invention are advantageous in that they make it possible to improve the behavior of a motor vehicle during a frontal impact with low coverage. More particularly, the invention makes it possible to reinforce the longitudinal sill beam and the floor of the vehicle against said shocks. Thus, the reinforcement makes it possible both to improve the stability of the connection between the sill beam and the floor, and to stabilize the beam in a direction longitudinal to the vehicle. In addition, the risks of shearing and tearing of the floor, following a frontal impact with low coverage, are limited. The risk of decoupling between the beam and the floor is also reduced. Also, the sill beam is maintained, which enables it to be able to withstand a bending torque exerted around the Z axis or around the Y axis.
• the invention also makes it possible to resist an intrusion from the 'passenger compartment, more particularly when this intrusion follows the X axis or the Y axis.
• the presence of the inclined intermediate portion between the two wings of the reinforcement makes it possible, moreover, to facilitate the manufacture of the reinforcement according to the invention, and more particularly to facilitate the formation of the ribs of the reinforcement.
• the ribs make it possible to increase the stiffness of the reinforcement without requiring the addition of additional walls which could be harmful in particular in terms of available space in the vehicle. More particularly, the ribs increase the stiffness of the reinforcement in torsion, bending and shear. The footprint of the vehicle following the installation of the reinforcement is minimal, which allows the original body structure of the vehicle to be retained without making major modifications.
• the mass of the vehicle is not increased, due in particular to the presence of ribs which limit the addition of mass provided by the reinforcement.
• the fixing of the reinforcement in the vehicle is preferably carried out by fixing screws, it is therefore easy to implement and allows a certain modularity according to the countries or territories of destination of the vehicles.
• the reinforcement according to the invention is produced by techniques known to those skilled in the art, and using materials also known and mastered by those skilled in the art.
• FIG 1 is a perspective view of a motor vehicle body structure according to the invention.
• FIG 2 is an enlarged view of part of the structure of Figure 1, at the level of a reinforcement making the connection between a sill beam and a vehicle floor;
• FIG 3 is an enlarged view around the reinforcement of Figure 2.
• the arrow X designates a longitudinal direction of movement of the vehicle in forward gear.
• the Y arrow indicates a direction transverse to the X arrow, from left to right.
• the arrow Z denotes a direction transverse to a plane passing through the arrows X and Y, oriented from the bottom to the top.
• Figure 1 is a perspective view of a body structure of a motor vehicle according to the invention.
• the vehicle 1 comprises at least the body structure 3 according to the invention, which defines, on an interior side 3A, a passenger compartment 5.
• the passenger compartment 5 comprises a driving position 9 positioned at one of the lateral sides 7 of the vehicle. 1.
• the driving position 9 is shown on a left lateral side 7A, but it can also be positioned, in certain vehicles, on a right lateral side 7B (this case not being shown in these figures ).
• the body structure 3 further comprises a floor 11 framed laterally by two longitudinal sill beams 13. Each beam 13 extends from a front leg 15 to a rear leg 17 of the vehicle 1.
• Figures 2 and 3 show two enlarged views of the connection between the beam and the vehicle floor, and including the reinforcement.
• the reinforcement 19 is advantageously positioned on the lateral side 7 corresponding to the driving position (visible in FIG. 1), in this figure it is more specifically the left lateral side 7A.
• This reinforcement 19 is a stamped with an L-section comprising two wings (19A, 19B), a first wing 19A fixed to the floor 11 and a second wing 19B fixed to the longitudinal beam 13 of the sill.
• This reinforcement 19 is more specifically fixed at the level of the front foot 15 of the vehicle 1.
• the longitudinal beam 13 comprises a curved wall 13B at the front which forms the front foot 15, the reinforcement 19 being more precisely located to the right of the curved wall 13B.
• the second wing 19B of the reinforcement 19 is fixed against a vertical side wall 13A of the longitudinal beam 13 of the corresponding sill.
• the first wing 19A of the reinforcement 19 has a length LA, in a main horizontal direction perpendicular to the longitudinal direction X.
• the second wing 19B of the reinforcement 19 has a length LB in a vertical main direction perpendicular to the longitudinal direction. X.
• the length LA of the first wing 19A is greater than three times the length LB of the second wing 19B of the reinforcement 19.
• the second wing 19B has a width IB greater than a width IA of the first wing 19A.
• the reinforcement 19 further comprises an inclined intermediate portion 19C relative to the first and second wings (19A, 19B).
• This reinforcement 19 also comprises at least one stiffening rib 19D.
• the reinforcement 19 comprises several stiffening ribs 19D, these ribs 19D serving to provide additional stiffness in torsion, bending and shearing which would otherwise require a greater stamping thickness.
• the rib or ribs 19D extend continuously from the first wing 19A to the second wing 19B.
• the reinforcement 19 is advantageously fixed to the body structure 3 by screwing.
• the reinforcement 19 is made of metallic materials, such as steel.

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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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=72709423

Family Applications (1)

Country Status (4)

Families Citing this family (1)

Family Cites Families (10)

• 2020
  • 2020-04-15 FR FR2003758A patent/FR3109357B1/fr active Active
• 2021
  • 2021-03-15 WO PCT/FR2021/050432 patent/WO2021209697A1/fr not_active Ceased
  • 2021-03-15 EP EP21718932.3A patent/EP4136012A1/de active Pending
  • 2021-03-15 CN CN202180028658.1A patent/CN115397721A/zh active Pending

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