Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
  • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
• • 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
• • 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
  • 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
  • B62D21/155—Sub-frames or underguards
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
  • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
  • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
  • B60K2001/0416—Arrangement in the rear part of the vehicle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K1/00—Arrangement or mounting of electrical propulsion units
  • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
  • B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
  • B60K2001/0438—Arrangement under the floor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2306/00—Other features of vehicle sub-units
  • B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection

Definitions

• TITLE MOTOR VEHICLE WITH REAR IMPACT LOAD RESUMPTION BY A TRACTION BATTERY BOX
• the present invention relates to the field of motor vehicles, more particularly the field of the structure of motor vehicles.
• the rear impact protocol by a deformable barrier of 1368 kg moving at 80 km/h towards the rear of a stationary motor vehicle, with a recovery of 70%, as well as than the rear impact protocol by an 1800 kg rigid barrier moving at 51 km/h towards the rear of a stationary motor vehicle, with 100% recovery.
• the first protocol is particularly constraining by the significant intrusion resulting from the partial overlap.
• the second protocol is also particularly restrictive from the point of view of the accelerations generated, due to the rigidity and the mass of the barrier.
• the published patent document FR 3 103450 A1 proposes a motor vehicle structure with electric traction, capable of protecting the traction batteries in the event of a rear collision.
• the traction battery receiving tray includes two side profiles and a rear transverse profile attached to the rear ends of the side profiles.
• the rear axle moves forward and comes into contact with the rear transverse section.
• the rear cross channel attachments to the rear ends of the side channels are beak shaped so as to control the warping of the channels. This solution is essentially aimed at protecting the traction batteries.
• the present invention aims to overcome at least one of the drawbacks of the aforementioned state of the art. More particularly, the aim of the invention is to improve the behavior of a motor vehicle with electric traction to rear collision protocols, in an economical manner and without adding significant weight.
• the subject of the invention is a motor vehicle comprising:
• the connecting piece ensures a direct connection between the fixing means and the side sections.
• the fastening means comprise on each lateral side of the motor vehicle:
• fastening means are advantageously silent blocks, more advantageously two silent blocks.
• each core comprises a portion of vertical tube through which a screw passes, with an upper face against the structure and a lower face against the corresponding connecting piece through which said screw passes.
• each of the connecting pieces comprises a tab with a front end fixed to the corresponding side profile and a rear end fixed to the fixing means.
• each of the two tabs is bent at 90°.
• each of the two side profiles has a cross section forming at least one cavity, the front end of each of the two legs being embedded in the at least one cavity.
• the motor vehicle comprises, on each lateral side of the motor vehicle, a part for fixing the tray to the structure, respectively, each of said fixing parts being adjacent to the corresponding side profile and having an upper face fixed to said structure.
• each of the connecting pieces comprising a complementary tab with a front end rigidly linked to the fixing piece and a rear end joining the rear end of the corresponding tab.
• the rear axle comprises a cradle comprising the fixing means.
• each of the side profiles is an extruded rectilinear profile with a cross section forming several closed cavities.
• FIG 1 is a side view of a vehicle structure during a rear impact protocol
• FIG 2 shows a bottom view of a vehicle according to a first embodiment of the invention
• FIG 3 shows a perspective view of the connecting piece according to the first embodiment of the invention
• FIG 4 is a perspective view of the connecting piece according to the first embodiment of the invention.
• FIG 5 shows a partial bottom view of a vehicle according to a second embodiment of the invention
• FIG 6 is a perspective view of the connecting piece according to a third embodiment of the invention.
• FIG. 1 is a side view of a conventional vehicle during a rear impact protocol, said vehicle comprises a structure 8 with a floor, a tray 2 for traction electric energy accumulators, commonly called a battery box, arranged under the floor and comprising two side sections 6, a rear axle 4 arranged at the rear of the box 2 and fixed to the structure 8 by fixing means 10, the vehicle undergoes the force of the rear impact caused by a rear impact barrier 1 mainly at the level of the structure 8 and the rear axle 4 and this, without passing through the tray 2, said effort is illustrated by arrows.
• a rear impact barrier 1 mainly at the level of the structure 8 and the rear axle 4 and this, without passing through the tray 2, said effort is illustrated by arrows.
• the lower part of Figure 1 is a side view of a vehicle according to the invention during a rear impact protocol, comprising a connecting piece 20, 30, 40, in this case according to three modes of embodiment which will be described below, between the rear axle 4 and each of the two side sections 6 of the tray 2.
• a connecting piece 20, 30, 40 in this case according to three modes of embodiment which will be described below, between the rear axle 4 and each of the two side sections 6 of the tray 2.
• Each of the two mechanical connections 20, 30, or 40 is made, to the rear axle 4, with the fixing means 10 of said rear axle 4 to the structure 8, so as to allow transmission of the force of the rear impact to the side sections 6 passing first through the structure 8, the rear axle 4, then by the fixing means 10 and the sections 6 of tray 2.
• the lower left arrow illustrates the absorption of the force by the sections 6 of tray 2.
• the two side sections 6 belonging to tray 2 are in principle very dimensioned to allow their resistance during a test collision following a side impact protocol against a vertical post and can thus contribute substantially to the recovery of effort and
• the connecting piece 20, 30, 40 provides a direct connection between the fixing means 10 and the side sections 6.
• FIGS 2 and 3 illustrate a first embodiment of the invention
• the mechanical connection between the fixing means 10 and the side sections 6 is a direct connection provided by the connecting piece 20.
• the rear axle 4 comprises a cradle 5 fixed to the structure 8 by the fixing means 10.
• the cradle 5 of the rear axle 4 has rings 14 linked to the fixing means 10.
• each of the fastening means 10 comprises on each lateral side of the motor vehicle:
• each core 12 comprises a vertical tube portion through which a screw passes, with an upper face 18 against the structure 8 and a lower face 19 against the corresponding connecting piece 20 through which said screw passes.
• the connecting piece 20 comprises a tab 22 with a front end 21 fixed to the corresponding side profile and a rear end 23 fixed to the fixing means 10.
• the tip 13 belonging to the core 12 has a cylindrical outer surface in contact with the rear end 23 belonging to the leg 22 allowing it to ensure the direct and rigid connection between the structure 8 and the corresponding connecting piece 20.
• Each of the side profiles 6 is preferably an extruded straight profile, moreover, preferably made from an alloy of light metals, in particular an aluminum alloy.
• the side sections 6 are multi-chamber hollow sections comprising at least one cavity 7.
• the fixing of the tray 2 to the structure 8 is ensured by at least one fixing piece 24 arranged on each lateral side of the motor vehicle and adjacent to the corresponding side profile 6, said fixing piece 24 comprises an upper face 26 fixed to said structure 8 preferably by means of a screw.
• Tray 2 comprises a rear face 3, the fixing piece 24 is in direct contact with said rear face 3.
• the leg 22 can be a die-cast part, a stamped part, a forged part or even a mechanically welded part, and is moreover preferably made from an alloy of light and rigid metals, in particular an alloy of 'aluminum.
• the fixing of the lug 22 with the side profile 6 can be formed by welding, for example by one or more weld beads and/or by spot welds.
• the lug 22 can be part of the fixing piece 24, thus forming a single piece.
• said part formed by the tab 22 and the fixing part 24 can be a molded part and is moreover preferably made from an alloy of light and rigid metals, in particular an aluminum alloy.
• Figure 4 illustrates a perspective view of the connecting piece 20 comprising the tab 22 having the front end 21 which may be intended to fit into the at least one cavity of the side section of the battery tray.
• the embedding of the tab 22 is ensured by means of a pin 9 belonging to the side profile 6, preferably, said pin 9 is positioned inside the cavity belonging to the side profile and is intended to be recessed by wedging in a cavity belonging to the front end 21 of the tab 22.
• a fixing of the front end 21 of the leg 22 can be made with the tray, said fixing can be formed by welding.
• the welds can be made directly on the rear face of the tank.
• the tip 13 belonging to the core of one of the fixing means 10 has a cylindrical outer surface in contact with the rear end 23 belonging to the leg 22 allowing it to ensure the direct and rigid connection between the structure 8 and the corresponding connecting piece 20.
• Figure 5 illustrates a second embodiment of the invention consisting in ensuring a direct connection between the fixing means 10 and the side profile 6 by means of a connecting piece 30.
• each of the fastening means 10 comprises, on each lateral side of the motor vehicle, the core fixed to the structure 8, the silentblock-type elastomer connecting the core and the ring, each of the connecting pieces 30 being fixed to one of the cores .
• each core comprises a portion of vertical tube through which a screw passes, with an upper face against the structure and a lower face against the corresponding connecting piece 30 through which said screw passes.
• the connecting piece 30 comprises a tab 32 bent at 90° and having a front end 31 fixed to the corresponding side profile 6 and a rear end 33 fixed to the fixing means 10.
• the cylindrical outer surface of the tip belonging to the core connected to the structure 8 is in contact with the rear end 33 of the tab 32 allowing it to ensure the direct and rigid connection between the structure 8 and the connecting piece 30 corresponding.
• the front end 31 of the connecting piece 30 can be intended to fit into at least one cavity of the side profile 6 of the tray 2.
• Leg 32 may be a die cast, stamped or forged part and is further preferably fabricated from a light and rigid metal alloy, particularly an aluminum alloy.
• the fixing of the tab 32 with the side profile 6 is preferably formed by an embedding of the front end 31 in the at least one cavity, said embedding can be obtained by the wedging of the front end 31 in the au minus one cavity.
• Figure 6 illustrates a third embodiment of the invention consisting in ensuring a connection between the fixing means 10 and the side profile by means of a connecting piece 40.
• each of the fixing means 10 comprises, on each lateral side of the motor vehicle, the core fixed to the structure, the silentblock-type elastomer connecting the core and the ring, each of the connecting pieces 40 being fixed to one of the cores.
• each core comprises a portion of vertical tube through which a screw passes, with an upper face against the structure and a lower face against the corresponding connecting piece 40 through which said screw passes.
• the connecting piece 40 comprises the leg 32 bent at 90° and having the front end 31 fixed to the corresponding side profile and the rear end 33 fixed to the fixing means 10.
• the fixing of the tray to the structure is ensured by the at least one fixing piece adjacent to the corresponding side profile, the upper face belonging to said fixing part is fixed to said structure preferably by means of a screw.
• the fixing part is in direct contact with the rear face of the container.
• the connecting piece 40 also comprises a complementary leg 42 with a front end 41 rigidly linked to the fixing part and a rear end 43 joining the rear end 33 of the corresponding leg 32.
• the leg 32 belonging to the connecting part 40 can be a die-cast part, a stamped part or a forged part and is moreover preferably made from an alloy of light and rigid metals, in particular an alloy of aluminum.
• the fixing of the tab 32 with the side profile 6 is preferably formed by an embedding of the front end 31 in the at least one cavity, said embedding can be obtained by the wedging of the front end 31 in the au minus one cavity.
• the complementary lug 42 is part of the fixing part, thus forming a single and same part.
• said part formed by the complementary lug 42 and the fixing part can be a molded part and is moreover preferably made from an alloy of light and rigid metals, in particular an aluminum alloy.
• the front end 41 of the complementary lug 42 can be fixed directly to the fixing lug, said fixing can be formed by one or more cords and/or by spot welds.
• the complementary leg 42 can be a die-cast, stamped or forged part and is furthermore preferably made from an alloy of light and strong metals, in particular an aluminum alloy.
• the cylindrical outer surface of the tip belonging to the core connected to the structure is in contact with the rear end 43 belonging to the complementary tab 42 allowing it to provide the rigid connection between the structure and the connecting piece 40 corresponding, said rear end 43 joins the rear end 33 of the leg 32.
• the rear end 43 as well as the rear end 33 comprise a hinge pin 17 common to the two rear ends 43, 33.
• said rear end 33 is in the form of a fork, said fork belonging to the tab 32 is configured to be in direct contact with the underside of one of the fixing means 10.
• the joint 17 between the tab 32 and the tab complementary 42 allows a better transmission of force in the event of a rear impact towards one of the two side sections 6 by avoiding a transverse rupture of the tab 32.
• the installation of the connecting piece 20, 30, 40 according to the invention in a motor vehicle comprising a traction battery also allows the transmission of the rear impact force caused by the rear impact barrier to the side sections. passing first through the structure, the rear axle, then through the fixing means 10 and the profile of the battery tray.
• this saves weight in terms of the structure of the vehicle.
• the invention allows a significant saving in mass on the structure of all motor vehicles equipped with a connecting piece 20, 30, 40 and at the same time, the behavior of said vehicles during rear impact protocols will be significantly improved by the fact of the use of the side profiles belonging to the traction battery tray as a means of absorbing forces.

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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)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=78212356

Family Applications (1)

Country Status (5)

Family Cites Families (8)

• 2021
  • 2021-09-29 FR FR2110255A patent/FR3127463B1/fr active Active
• 2022
  • 2022-09-02 CN CN202280066153.9A patent/CN118119518A/zh active Pending
  • 2022-09-02 US US18/684,797 patent/US20240351420A1/en active Pending
  • 2022-09-02 WO PCT/FR2022/051655 patent/WO2023052699A1/fr not_active Ceased
  • 2022-09-02 EP EP22783532.9A patent/EP4408690A1/de active Pending

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