Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
  • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
  • B62D21/152—Front or rear frames
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
  • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
  • B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
  • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
  • B60R19/24—Arrangements for mounting bumpers on vehicles
  • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
  • B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
• • 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
  • B62D25/08—Front or rear portions

Definitions

• the invention is in the automotive field and relates to the front shock absorber devices of motor vehicles, and vehicles comprising such devices.
• test protocols of a vehicle in the context of a low recovery frontal impact consist in generating a collision between a vehicle launched at 64 km / h against a rigid buffer with only 25% coverage of the front of the vehicle. This is the most severe frontal shock protocol at the moment.
• the document US2014 / 0008936 proposes a front vehicle structure comprising, on each side, a double absorber (also called “crash box") connected to the front cross member.
• the stretcher has, at its front end, a particular S shape allowing it to reach the most eccentric absorber while having his body facing the other absorber.
• a force recovery element connects the least off-center absorber to the stretcher.
• This solution has the disadvantage of requiring significant changes in the vehicle body, so it can not be easily adapted to current vehicles.
• Document US9233714 proposes a triangular reinforcing element fastened to the spar behind the fixing plate of the front cross member in order to transmit the energy of a low overlap shock to the spar. This solution is interesting, but deserves to be further improved.
• the invention aims to meet at least one of the drawbacks of the prior art, in particular it proposes a new vehicle favoring a collision scenario in which it is deflected obliquely in the event of a frontal collision with weak recovery; the solution can be adapted to existing vehicle architectures.
• the invention relates to a vehicle having a front structure comprising a bumper beam connecting transversely main absorbers, said main absorbers being fixed on the ends of front stretchers via of turntables, the vehicle being remarkable in that it further comprises at least one deflector mounted on the outer side face of one of the front stretchers and arranged to be aligned in the longitudinal direction of the vehicle with an absorber.
• the invention is remarkable in that it will associate a deviator and an absorber by aligning them with each other.
• the deflector is in the form of a stop that will receive on its front face a force in the longitudinal direction of the vehicle from an absorber, and transmit this effort to the front stretcher on one of its longitudinal sides. This transmission of effort will generate a deviation of the vehicle in its transverse direction, allowing it to escape the bumper and thus reducing by 20% approximately the energy to be absorbed.
• the presence of an absorber in alignment with the deflector makes it possible to start transmitting the forces from the beginning of the collision. It slows the kinematics of the collision and allows, in addition, to the wheel before escaping.
• At least one deflector is in the form of a stop showing a base disposed in abutment on the outer lateral face of one of the front stretchers, a front face intended to receive the forces coming from the absorber and an inclined face. from front to rear in the longitudinal direction of the vehicle towards the longitudinal median axis of the vehicle so that its front face has a width greater than the width of its rear face.
• the width of the deflector is its dimension along the transverse axis of the vehicle.
• the deflector is made of metal material.
• the vehicle comprises at least one secondary absorber disposed eccentrically with respect to the main absorbers, and at least a deflector is aligned in the longitudinal direction of the vehicle with a secondary absorber, so that the forces received by the secondary absorber are transmitted to the front stretcher through said deflector.
• the secondary absorber is connected to a beam extension.
• the deflector comprising a front face
• the vehicle is remarkable in that the main absorbers have a width greater than the width of the end of a front stretcher, said absorbers being arranged to be aligned, in the longitudinal direction of the vehicle, both with the end of a front stretcher and the front face of a deflector, so that the forces received by the absorber are transmitted to the front stretcher in a direct way and also through said diverter.
• said absorbers have a width at least equal to the cumulative width of the end of a front stretcher and the front face of the deflector.
• At least one main absorber is disposed partially under the bumper beam and has or is connected to a beam extension on its non-disposed portion under said beam.
• a plate is arranged between an absorber and the front face of a deflector.
• said platen is a platen showing a width sufficient to extend facing both the front face of the deflector and the front end of a front stretcher; or said plate is an additional plate, preferably fixed to the plate arranged between a main absorber and the front end of a front stretcher.
• an absorber is connected directly to the front of a deflector.
• the deflector is fixed on the front stretcher and / or on a plate.
• the fixing is done by screwing.
• the vehicle comprises a wheel arch structure element fixed to the front strut and disposed behind and away from the deflector, extending on the side of the outer lateral face of the stretcher on which the deflector is disposed. , and a spacer disposed between the deflector and the wheel structure element, in the extension of the deflector in the longitudinal direction of the vehicle.
• the forces in the longitudinal direction which are transmitted by the deflector are taken up at least partly by the spacer and the wheel arch structure element disposed behind said spacer.
• the deflector is held more rigidly in the longitudinal direction. The risks of recoil of said deflector under the effect of the forces in case of impact are limited, and the deflection of the vehicle in the transverse direction obtained by the effect of the deflector is improved.
• the spacer has a front face which rests or is fixed against the rear face of the deflector.
• the deflector transmits directly on the spacer efforts in the longitudinal direction, avoiding the displacement of the deflector.
• the spacer is in abutment or is fixed against the wheel arch structure element.
• the spacer is mechanically linked to the wheel arch structure element and is more resistant to forces in the longitudinal direction of the vehicle transmitted by the deflector.
• the spacer is in support or fixed against the side face of the stretcher.
• the spacer is more resistant to forces in the direction transverse to the vehicle.
• the spacer is attached to the stretcher.
• the spacer can directly transmit forces in the longitudinal direction of the vehicle on the stretcher, as well as efforts in the transverse direction.
• the risks of recoil of said deflector under the effect of the forces in case of impact are further limited, increasing the effect of the deflector on the deviation of the vehicle in the transverse direction.
• the base of the deviator is configured to match the shape of the side face of the front stretcher disposed opposite.
• Figure 1 is a representation of a first embodiment of the invention.
• Figure 2 is a representation of a second embodiment of the invention.
• Figure 3 is a representation of a third embodiment of the invention.
• Figures 4 and 5 illustrate the kinematics of a collision with low coverage for a vehicle according to the invention.
• understand is synonymous with “include” and is not limiting in that it allows the presence of other elements in the vehicle to which it relates. It is understood that the term “understand” includes the words “consist of”.
• the terms “inferior”, “superior”, “front” and “rear” shall be understood in relation to the general orientation of the vehicle. “Inferior” will mean a greater proximity to the ground than “higher” along the vertical axis. In the different figures, the same references designate identical or similar elements.
• FIG. 1 showing a partial perspective view of a front structure of a vehicle according to the invention.
• the front structure 1 comprises a beam 3 of bumper transversely connecting absorbers 5.
• the absorbers are fixed on the ends of front longitudinal struts 7 via plates 9.
• the vehicle further comprises at least a deflector 1 1 mounted on the outer lateral face 13 of one of the front stretchers 7 and arranged to be aligned in the longitudinal direction of the vehicle with an absorber 15.
• the deflector 1 1 is in the form of a stop showing a base disposed in abutment on the outer lateral face 13 of one of the front stretchers, a front face 17 intended to receive the forces coming from the absorber 15 and an inclined face 19 from front to rear in the longitudinal direction of the vehicle towards the longitudinal median axis of said vehicle so that its front face 17 has a width greater than its rear face 18.
• the upper and lower faces of the deflector 1 1 have a substantially triangular shape. This configuration makes it possible to deflect the vehicle along its transverse axis when a force is received by the deflector 1 1, since the force received along the longitudinal axis of the vehicle is transmitted to the front stretcher 7 along the transverse axis of the vehicle.
• the deflector 1 1 is arranged at the front end of the front stretcher 7.
• the transmission of the forces by the deflector 1 1 front stretcher 7 will generate a deformation of said stretcher 7 (as we shall see later) .
• the stretcher by its stiffness and resistance to deformation, will initiate a deflection of the vehicle along its transverse axis.
• At least one deflector 1 1 may be made of a metallic material.
• at least one deflector 1 1 is steel or aluminum.
• a deflector 1 1 may optionally have lightening holes.
• the deflector 1 1 shows a solid body.
• the absorber 15 arranged to be aligned in the longitudinal direction of the vehicle with the deflector 1 1 is a secondary absorber 15.
• the vehicle then comprises, at the level of its front structure 1, two pairs absorbers (5, 15).
• the two main absorbers 5 are arranged intercalated between the secondary absorbers 15.
• the main absorbers 5 thus have a central position with respect to the secondary absorbers 15 which are arranged eccentric with respect thereto.
• This configuration is particularly advantageous when it is chosen not to modify the front structure 1 of the vehicle so as to make it adaptable between a version with passive means reinforcing the low-overlap impact protection and a version devoid of said protection means, according to the requirements of different markets.
• main absorbers 5 themselves to perform the function of transmitting the forces received to the deviator 11.
• main absorbers 5 have a width at least equal to the cumulative width of the end of a front stretcher 7 and the front face 17 of the deviator January 1.
• the bumper beam 3 does not extend beyond, in the transverse direction of the vehicle, the front struts 7.
• the man of the profession will find it advantageous to provide the secondary absorber 15 with a beam extension which will extend the length of the bumper beam 3 in the transverse direction of the vehicle, until covering the deflector 1 1.
• Such a configuration is also possible in the case of the use of enlarged main absorbers. These will then be only partially covered by the beam 3 of bumper.
• the uncoated portion will then advantageously be provided with an extension 21 of beam 3.
• the extension 21 of beam 3 may be integral with the absorber (5, 15) in question (secondary or expanded).
• plates 9 are arranged between the front ends of the front stretchers 7 and the main absorbers 5.
• a plate is also arranged between the absorbers (5, 15) and the deviators 1.
• Platinum can come in many forms. For example, it may be a single plate (not shown) showing a width sufficient to extend facing both the front face 17 of the deflector 1 1 and the front end of a front stretcher 7. Such a single platinum will be connected, depending on the case, to a pair of absorbers (5, 15), namely both a main absorber 5 and a secondary absorber 15; or to an enlarged main absorber.
• the vehicle comprises an additional plate 23, preferably fixed to the plate 9 arranged between a main absorber 5 and the front end of a front stretcher 7.
• no plate is inserted between the front face of a deflector 1 1 and an absorber 15. Said front face of the deflector is then dimensioned and configured to act as platinum fixing.
• the deflector 1 1 is fixed on the lateral face
• Fixing can be done by welding or screwing. Preferably, it is done by screwing to show a mechanical strength necessary for its function.
• the deflector 1 1 is configured so that its base matches the shape of the stretcher before facing, presenting a complementary shape.
• the vehicle comprises a wheel arch structure element 16 fixed to the front stretcher 7 and disposed behind and away from the deflector 1 1. to say that the wheel arch structure element 16 is arranged more towards the rear of the vehicle, in the longitudinal direction of the vehicle, than the deflector 1 1.
• This wheel arch structure element 16 extends on the side of the outer lateral face 13 of the stretcher 7 on which the deflector 1 1 is disposed, and is fixed to said stretcher 7. It is positioned at a distance from said deviator January 1.
• a spacer 14 is disposed between this deflector 1 1 and said wheel arch structure member 16. The spacer 14 is in the extension of the deflector 1 1 in the longitudinal direction of the vehicle.
• the spacer 14 comprises a front face, which bears against the rear face 18 of the deflector 1 1.
• the front face of the spacer 14 is mechanically fixed to the rear face 18 of the deflector 1 1.
• the spacer 14 rests against the passage structure element 16.
• the spacer 14 is fixed at its rear end, for example by its rear face, to the structure of the wheel housing 16, the rear face of the spacer 14 being the face arranged vis-à-
• the wheel arch structure member 16 has a wall against which the rear face of the spacer 14 rests.
• the spacer 14 is attached to the wheel arch structure element 16.
• FIGS. 4 and 5 illustrating a collision scenario between a vehicle according to the invention and a bumper 25 according to a slight overlap of the front face of the vehicle.
• the buffer 25 will come into contact with the absorber secondary 15 (or with the expanded absorber as appropriate).
• the absorber is deformed and the deflector 11 is loaded in turn.
• FIG. 4 it can be seen that the deflector is pressed against the outer lateral face of the front strut 7 and injects therein an oblique force (with a component along the transverse axis of the vehicle, that is to say along the Y axis ).
• the diverter 1 1 therefore loads the stretcher before 7 and the latter, because of its stiffness, begins to deflect the vehicle. As illustrated in FIG. 5, once the deflection has begun, the stopper 25 slides along the vehicle. The deviation accelerates and the vehicle completely escapes the obstacle formed by the bumper. The final loading of the structure is decreased.
• the kinematics of the collision is slowed down by the presence of an additional absorber.
• the orientation of the vehicle having changed due to the presence of a deflector, and because of the kinematics of idling, the stopper 25 will not crush the wheel 27, as in the prior art, but will unhook it.
• the wheel 27 is subjected to a lower impact force which allows it to spontaneously initiate an escape movement.
• the wheel has the time to turn and slide to finally be torn off.
• This aspect of the invention is particularly interesting because the absence of a wheel leaves a vacuum and therefore an additional area of deformation of the structure without intrusion into the passenger compartment.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=62067719

Family Applications (1)

Country Status (4)

Families Citing this family (4)

Family Cites Families (7)

• 2018
  • 2018-02-19 FR FR1851407A patent/FR3078047B1/fr active Active
• 2019
  • 2019-01-30 EP EP19707430.5A patent/EP3755605A1/de not_active Withdrawn
  • 2019-01-30 WO PCT/FR2019/050208 patent/WO2019158835A1/fr unknown
  • 2019-01-30 MA MA051896A patent/MA51896A/fr unknown

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