Classifications

• • 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
  • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
• • 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
  • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
  • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
  • B60R2019/1833—Structural beams therefor, e.g. shock-absorbing made of plastic material
  • B60R2019/184—Blow moulded

Definitions

• the invention relates to a bumper element for a motor vehicle.
• the invention more particularly relates to a bumper element for a motor vehicle, of the type which comprises at least one substantially shock absorbing element which is integral with a body structure element of the vehicle and which is covered with a shield, of the type in which the shock absorbing element is in the form of a substantially transverse orientation beam with respect to the general axial direction of the vehicle body structure element, of the type in which the shock absorbing element comprises deformation means for absorbing the energy of an impact with a pedestrian, and of the type in which the shock absorbing element comprises stiffening means intended to limit the deformations of said element during a shock of reduced intensity, including a shock occurring during maneuvers at reduced speed.
• bumper elements of this type are known.
• US-A1-2005 / 0029821 discloses and particularly represents a bumper element for a motor vehicle which comprises a shock absorbing element which is substantially integral with a metal reinforcing bar connected to the vehicle body and which is covered with a shield.
• the shock absorbing element has the shape of a substantially transverse orientation beam with respect to the general axial direction of the vehicle body structure element, which essentially comprises two horizontally interconnected horizontal wings. by stiffeners and connected by deformable inclined walls to a profile fitting on the metal crossbar. When the shock absorbing element is subjected to impact, the deformable inclined walls crash while allowing the wings to retract horizontally.
• This design has the disadvantage of firstly requiring a reinforcing metal cross member, which can, depending on the force of the impact, be brought into the vehicle body structure element.
• the wings can only move back in case of shock and therefore constitute protruding parts that may cause injury to said pedestrian.
• the invention proposes a bumper element for a motor vehicle of the type described above, the shock absorbing element comprises movable branches spaced apart.
• the invention proposes a bumper element of the type described above, characterized in that:
• the deformation means consist of a U-shaped section of the beam forming the shock absorption element, whose concavity is turned towards the shield and whose horizontal branches are intended to deviate in flexion when the shock absorbing element is subjected to a compression shock with a pedestrian,
• the stiffening means are arranged at the bottom of the U-shaped section of the beam forming the shock absorption element and are interposed between the vertical branch and the horizontal branches of said U-shaped section of the beam forming the element. shock absorption,
• the stiffening means comprise at least one substantially vertical wing whose two horizontal edges are connected to the horizontal branches of said U-section of the beam and of which a vertical edge is connected to the vertical branch and the horizontal branches of said U-section of the beam,
• the stiffening means comprise a plurality of substantially parallel vertical wings
• the stiffening means further comprise at least one horizontal wing which is interposed between two consecutive vertical wings,
• a horizontal edge of the horizontal wing is connected to the vertical branch of said U-shaped section of the beam
• At least one bridge is interposed between the horizontal branches of the U-shaped section of the beam forming the shock absorption element and is disjoint from the vertical leg of the U-section of the beam to limit the opening of the branches.
• the trigger guard consists of a substantially vertical element, one end of which is articulated by a hinge on a horizontal branch of the U-section of the beam and the other end of which is nested on the other horizontal branch of the U-shaped section. beam,
• the trigger guard comprises means for fastening the shield
• the horizontal branches, the wings and the bridge are made of material by molding a plastic material and the hinge is made in the form of a plastic film material obtained during molding.
• FIG. 1 is a diagrammatic sectional view of a bumper element according to the invention
• FIG. 2 is a perspective view of the shock absorbing element according to the invention.
• like reference numerals designate like parts or having similar functions.
• FIG. 1 shows a bumper element 10 for a motor vehicle 12.
• the bumper element 10 comprises at least one substantially transverse shock absorbing element 14 which is integral with a body structure element 15 of the vehicle and which is covered with a shield 17.
• the shock absorbing element 14 has the shape of a beam of orientation "T" substantially transverse to the general axial direction "A" of the element 15 of FIG. body structure of the vehicle.
• the shock absorbing element 14 comprises deformation means 16 for absorbing the energy of an impact with a pedestrian, and stiffening means 18 for limiting the deformations of said element 14 during a collision. a shock of reduced intensity, in particular a shock occurring during maneuvers at reduced speed.
• the invention provides a bumper element for a motor vehicle whose shock absorbing element 14 comprises branches 22, 24 movable spacing.
• the deformation means 16 consist of a U-shaped section of the beam forming the shock absorbing element 14, whose concavity 20 is turned to the shield 17 and whose horizontal branches 22, 24 are intended to deviate flexibly when the shock absorbing member 14 is subjected to a compression shock with a pedestrian.
• the horizontal branches 22, 24 deviate flexibly from one another in the direction of the arrows "F". which allows to dissipate a part of the kinetic energy caused by the shock.
• the stiffening means 18 are arranged at the bottom of the U-shaped section of the beam forming the shock absorbing element and are interposed between the vertical branch 26 and the horizontal branches 22, 24 of said U-shaped section. the beam forming the shock absorbing element 14.
• the stiffening means 18 comprise at least one substantially vertical flange 28, two horizontal edges 30, 32 of which are connected to the horizontal branches 22, 24 of said U-section of the beam and of which a vertical edge 34 is connected to the branch. vertical 26 of said U-section of the beam.
• the stiffening means 18 comprise a plurality of wings substantially parallel vertical. This configuration makes it possible to stiffen the shock absorption element 14 along most of its width oriented along the transverse direction "T".
• the stiffening means 18 further comprise at least one horizontal flange 36 which is interposed between two vertical flanges 28 consecutive.
• a horizontal edge 38 of each horizontal wing is connected to the vertical leg 26 of said U-section of the beam.
• stiffening means 18 structured according to a box-like structure or compartments which gives the element 18 a high degree of rigidity. in the bottom of its section in "U".
• At least one bridge 40 is interposed between the horizontal branches 22, 24 of the U-shaped section of the beam forming the shock absorption element and is separated from the vertical branch 26 of the U-shaped section of the beam to limit the opening of the horizontal branches 22, 24 of the U-section of the beam.
• This bridge 40 is for example constituted by a substantially vertical element whose end 42 is articulated by a hinge on the horizontal leg 24 of the U-section of the beam and the other end 44 is fitted on the other horizontal branch 22 of the U-section of the beam.
• the bridge 40 can therefore be assembled very simply to the shock absorbing element 14.
• the horizontal branches 22, 24, the wings 28, 36 and the bridge 40 are made of material by molding a plastic material and the hinge is made in the form a film of plastic material obtained during molding.
• the bridge 40 is assembled to the horizontal branch 22 by a simple interlocking operation.
• the bridge 40 can also advantageously, in addition to its function of limiting the opening of the horizontal branches 22, 24, perform other functions.
• the bridge 40 comprises shield attachment means 17.
• the invention therefore proposes a bumper element offering optimal shock absorption performance, especially in the event of impact with a pedestrian.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Vibration Dampers (AREA)
• Body Structure For Vehicles (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=37728399

Family Applications (1)

Country Status (3)

Family Cites Families (7)

• 2006
  • 2006-07-28 FR FR0653159A patent/FR2904279B1/fr not_active Expired - Fee Related
• 2007
  • 2007-07-27 WO PCT/FR2007/051738 patent/WO2008012477A2/fr active Application Filing
  • 2007-07-27 EP EP07823653A patent/EP2046607A2/de not_active Ceased

Non-Patent Citations (1)

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