• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a vehicle bumper beam (6), comprising: - a crossbar (10), and - at least one shock absorber (12), the shock absorber (12) being provided to carry the crossbar (10) fixed on the absorber and comprising a plate for fixing the shock absorber (12) on a structure of a vehicle, the shock absorber (12) being made of an optionally reinforced plastic material fiber. The bumper beam (6) further comprises at least one connecting member (16) connecting the plate (14) of the shock absorber (12) to the cross member (10), the connecting member (16) ) being adapted to retain the crossbar (10) to the plate (14) after deformation of the absorber (12) in case of shocks.
    公开号:FR3019785A1
    申请号:FR1453160
    申请日:2014-04-09
    公开日:2015-10-16
    发明作者:Patrick Borde
    申请人:Faurecia Bloc Avant；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a vehicle bumper beam, comprising: - a cross member, and - at least one shock absorber, the shock absorber being provided for carrying the crossbar fixed on the absorber and comprising a plate for fixing the shock absorber on a structure of a vehicle, the shock absorber being made of a plastic material optionally reinforced with fibers. Motor vehicles are designed to respond appropriately to different types of shocks, such as low-speed shocks or "parking shocks", for a speed of 2.5 to 4 km / h (ECE42), medium shocks speed or "reparability shocks", RCAR 16 km / h (Danner) and RCAR 10 km / h (Bumper Test), and high-speed shocks, for a speed between 56 and 65 km / h. To do this, the motor vehicles include one or more bumper beams in a front or rear bumper assembly, resting on the longitudinal members of the motor vehicle. In case of impact, these bumper beams, thanks to their specific mechanical properties, deform so as to absorb at least a portion of the impact energy. Thus, it is known to use bumper beams of steel sheet, which have good mechanical performance, but also a large mass, contributing to increase the total mass of the motor vehicle. It is known to use impact absorbers made of composite plastic material in order to reduce the mass of the bumper beam and to improve the absorption of the impact energy. However, there is a risk of disintegration of the composite bumper assembly during impact. One of the aims of the invention is to provide a reduced mass bumper beam, of reduced manufacturing cost, which can effectively absorb the energy of shocks and to preserve a cohesion to the entire bumper even after a significant shock.
    [0002] For this purpose, the invention provides a vehicle bumper beam of the aforementioned type, characterized in that the bumper beam further comprises at least one connecting member connecting the plate of the shock absorber to the cross, the connecting member being adapted to retain the cross member to the plate after deformation of the absorber in case of shocks.
    [0003] According to other embodiments, the bumper beam comprises one or more of the following characteristics, taken in isolation or in any technically possible combination: the beam comprises two shock absorbers, each absorber being disposed at an angle respective end of the cross; the connecting member is plastically deformed during an impact; - The connecting member is a metal part fixed on the plate and on the cross; - The connecting member is a flexible link fixed on the plate and on the cross; the connecting member is a braid.
    [0004] The invention also relates to a bumper assembly comprising two structural side members each having an end and a bumper beam as defined above, comprising two shock absorbers each attached to the end of a respective spar by the intermediate of its platinum. In one embodiment of the bumper assembly, the connecting member is adapted to retain the cross member with respect to the structural side members of the vehicle at a distance of less than about 100 mm downwards, after deformation of the absorber in case of shocks. The invention also relates to a motor vehicle comprising a bumper assembly as defined above.
    [0005] The invention and its advantages will be better understood on reading the following description, given solely by way of nonlimiting example, and with reference to the accompanying drawings, in which: - Figure 1 is a schematic perspective view exploded bumper assembly according to the invention; - Figure 2 is a perspective view of a portion of the bumper beam of Figure 1 illustrating a shock absorber and connecting members. - Figure 3 is a view similar to Figure 2 illustrating a shock absorber and a connecting member according to another embodiment. A vehicle bumper assembly 1 according to the invention is shown in FIG. 1. The bumper assembly 1 comprises a bumper beam 6 fixed to the ends of the two longitudinal members 4 of the body in white or structure of a vehicle, especially a motor vehicle. The terms "longitudinal", "transverse", "left", "right", "up", "down" are used with reference to the usual orthogonal reference frame of motor vehicles, comprising - a longitudinal axis X, directed from the rear towards the front, - a transverse axis Y, oriented from right to left, and - a vertical axis Z, oriented from the bottom to the top. The bumper assembly 1 is a front bumper assembly, in which case the side members 4 are longitudinal members of the front part of the structure, or a rear bumper assembly, in which case the side members 4 are side members of the part back of the structure. The spars 4 are structural main spars or auxiliary spars, such as front or rear engine cradle extensions or front or rear fender spars. The longitudinal members 4 extend in the longitudinal direction, each along a respective longitudinal axis. The longitudinal members 4 are spaced in the transverse direction. Each spar 4 is provided at its end with a spar plate 8 for fixing the bumper beam 6 on the spar 4.
    [0006] The bumper beam 6 comprises a cross member 10 and two shock absorbers 12. Each shock absorber 12 comprises a plate 14 for attaching the shock absorber 12 to a spar 4. The bumper beam 6 comprises, in addition, for each shock absorber 12, at least one connecting member 16 connecting the plate 14 of the shock absorber 12 to the cross member 10.
    [0007] The bumper beam 6 is intended to be fixed to the longitudinal members 4 by means of the shock absorbers 12, each shock absorber 12 being fixed on and in abutment on a respective spar 4 via the plate 14 of the absorber 12 and the spar plate 8. The cross member 10 extends in the transverse direction. The cross member 10 is supported in the longitudinal direction on the longitudinal members 4 by means of the shock absorbers 12. The cross member 10 is advantageously hollow. The cross member 10 is, for example, metal, especially steel. The crosspiece 10 is provided on its upper face and on its underside a plurality of fastening holes 22 for fixing the cross member 10 to the connecting members 16. In the example shown in Figure 1, the cross member has four holes 22 by absorbers of shocks 12, the holes 22 for both fixing the cross member 10 to the absorber 12 and the connecting members 16. The transverse spacing of the shock absorbers 12 is substantially equal to that of the side members 4. Each of the two absorbers 12 is attached to the end of a respective spar 4 via its plate 14. In addition, each shock absorber 12 is disposed at a respective end of the cross member 10 and extends in the longitudinal direction. . Each shock absorber 12 extends longitudinally associated spar 4. Each shock absorber 12 is made at least partly of a plastic material optionally reinforced with fibers. The shock absorber 12 is able to absorb the energy of an impact by deforming between a state of rest and a crushed state. For significant shocks, the shock absorber 12 also absorbs energy by degrading. The term "degrade" means that the shock absorber 12 is no longer integral, that is to say, able to retain the cross member 10 in position relative to the spar 4. The shock absorber 12 consists of An absorber member 30 and a casing 32. The casing 32 surrounds the absorber member 30. The absorber member 30 is preferably a hollow cylinder. The absorber member 30 is made of a plastic composite material, preferably a long fiber reinforced plastic material, known as LCFRP. The absorber element 30 extends in the longitudinal direction X. As illustrated in FIG. 1, the absorber element 30 is formed of two half-shells 34, 36. Each half-shell 34, 36 is half-cylindrical according to the longitudinal direction and provided with two flanges for the mutual attachment of the half-shells, for example using screws or rivets. The envelope 32 of the shock absorber 12 is made of plastic material reinforced with short fibers. In the example illustrated in Figures 1 and 2, the envelope 32 is formed of two half-envelopes, each covering a respective half-cylinder. The surface of the absorber element 30 is full. The envelope 32 is perforated.
    [0008] The plate 14 for fixing the shock absorber 12 on a spar 4 is formed on the casing 32. The plate 14 has fixing holes. Each shock absorber 12 is designed to carry the cross member 10 fixed on the absorber 12. In the example illustrated in FIGS. 1 and 2, the absorber 12 has, on its casing 32, a cross-member fixing support 40, pierced on its lower and upper surface facing the fixing holes 22 of the crosspiece 10. The support 40 defines a U-shaped profile oriented transversely, the cross member 10 being received in the support 40. In the example shown, two connecting members 16 are arranged on each shock absorber 12. Each connecting member 16 is able to deform without breaking in the event of impact, impacting the shock absorber 12, so that the shock absorber 12 no longer carries the cross member. 10.
    [0009] Each connecting member 16 forms an auxiliary support for carrying the cross member 10 in case of damage to the absorber 12 such that the absorber 12 no longer carries the cross member 10. Each connecting member 16 is adapted to retain the cross member 10 to the plate 14 after deformation of the absorber 12 in the event of shocks, at a vertical distance of less than about 100 mm downwards, after deformation of the absorber in the event of shocks 12. In the example shown in FIGS. 2, the connecting member 16 is a metal piece fixed on the plate 14 and the crosspiece 10. The connecting member 16 comprises a first fixing portion 50, a central coupling portion 52 and a second fixing portion 54 The first fixing part 50 is fixed on the plate 14. The rear fixing part 50 extends in the vertical direction Z and defines two holes opposite the holes of the plate 14. The first fixing part 50 is intended for bind the organ of the The central coupling part 52 extends in the longitudinal direction X. It comprises a gutter in which the flanges are inserted. The central coupling portion 52 seals the cylinder 30. The second fixing portion 54 is fixed to the cross member.
    [0010] The second fixing portion 54 extends in the vertical direction Z. It comprises at its ends returns extending in the longitudinal direction. The returns are drilled opposite the holes 22 of the cross member 10. The second fixing portion 54 is intended to bind the cross member 10 and the attachment support 40 of the shock absorber 12 to the connecting member 16.
    [0011] The connecting member 16 is plastically deformed during an impact. It is less fragile than the shock absorber 12. The connecting member 16 is able to deform easily without breaking. The connecting member 16 is adapted to compress longitudinally at a force of less than about 100 N. The absorber 12 is adapted to deform longitudinally under a force of less than 100 kN. The connecting member 16 remains in one piece after the shock and is thus able to retain the cross member 10. Indeed, the first fixing portion 50, the second fixing portion 54 and the central portion 50 remain attached. The connecting member 16 secures the plate 14 of the shock absorber 12 to the cross member 10, so that the connecting member 16 is adapted to maintain the cross member 10 secured to the plate 12 in place of the absorber shocks 12, when the shock absorber 12 is degraded.
    [0012] The operation of the device will now be described. During a major shock of the vehicle, the shock absorber 12 is degraded. However, the connecting members 16 maintain a cohesion of the assembly of the bumper assembly 1 and connect the plate 14 to the crosspiece 10. The connecting members 16 thus prevent the cross member 10 from falling on the ground even if it is no longer maintained by the shock absorber 12. This allows the vehicle to roll to join a garage for repair. Another embodiment of the invention will now be described, with reference to FIG. 3. This embodiment differs from the embodiment previously described in that, the connecting member 16 is a flexible link fixed on the plate. 14 and on the cross member 10 by fixing ends 60 and 62. For example, the connecting member 16 is a braid, including a metal braid or textile. The length of the link, when stretched, is advantageously close to the length of an absorber 12.
    [0013] During an impact, after a deformation of the absorber 12 in the event of shocks, if the absorber 12 is no longer able to retain the cross member 10, the cross member 10 tends the flexible link under the effect of its weight. The cross member 10 is suspended from the spar by means of the connecting member 16. The link member 16 then retains the cross member 10 relative to the structural side members 4 of the vehicle at a distance less than about 100 mm downwards. after deformation of the absorber 12 in case of shocks. The connecting member 16 retains the cross member 10 so as to prevent it from touching the ground. The invention provides a bumper beam 6 of reduced mass, reduced manufacturing cost, and can effectively absorb shock energy and to preserve a form assembled to the entire bumper 1 even after a significant shock .
    权利要求:
    Claims (9)
    [0001]
    1. A vehicle bumper beam (6), comprising: - a beam (10), and - at least one shock absorber (12), the shock absorber (12) being provided to carry the beam ( 10) fixed on the absorber and comprising a plate for fixing the shock absorber (12) on a structure of a vehicle, the shock absorber (12) being made of a plastic material optionally reinforced with fibers , characterized in that the bumper beam (6) further comprises at least one connecting member (16) connecting the plate (14) of the shock absorber (12) to the cross member (10), the connecting member (16) being adapted to retain the cross member (10) to the plate (14) after deformation of the absorber (12) in case of shocks.
    [0002]
    2. Bumper beam (6) according to claim 1, comprising two shock absorbers (12), each absorber (12) being disposed at a respective end of the cross member (10).
    [0003]
    3. Bumper beam (6) according to any one of the preceding claims, wherein the connecting member (16) is plastically deformed during an impact.
    [0004]
    4. Bumper beam (6) according to claim 3 wherein the connecting member (16) is a metal part fixed on the plate (14) and on the cross member (10).
    [0005]
    5. Bumper beam according to any one of claims 1 to 3, wherein the connecting member (16) is a flexible link fixed to the plate (14) and the cross member (10).
    [0006]
    6. Bumper beam (6) according to claim 5, wherein the connecting member (16) is a braid.
    [0007]
    7. A vehicle bumper assembly (1) comprising two structural longitudinal members (4) each having an end and a bumper beam (6) according to any one of the preceding claims, comprising two shock absorbers (12). each attached to the end of a respective spar (4) via its plate (14).
    [0008]
    8.- assembly (1) according to claim 7, wherein the connecting member (16) is adapted to retain the cross member (10) relative to the structural side members (4) of the vehicle at a distance of less than about 100mm to the bottom, after deformation of the absorber (12) in case of shocks.
    [0009]
    9. Vehicle comprising a bumper assembly (1) according to any one of claims 7 or 8.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3019785B1|2016-05-13|
    ES2627189T3|2017-07-27|
    EP2930067B1|2017-03-01|
    US20150291114A1|2015-10-15|
    EP2930067A2|2015-10-14|
    EP2930067A3|2015-10-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE202009006264U1|2009-04-28|2010-09-16|Quadrant Metal Plastic Solutions Gmbh|crossbeam|
    DE102012200410A1|2012-01-12|2013-07-18|Thermoplast Composite Gmbh|Energy-absorbing support structure and method for producing this|
    EP2762367A1|2013-02-01|2014-08-06|Faurecia Bloc Avant|Bumper assembly for motor vehicle|
    US9598033B1|2015-11-09|2017-03-21|United States Council For Automotive Research, Llc|Joining and reinforcing a composite bumper beam and a composite crush can for a vehicle|
    US9764704B1|2016-03-03|2017-09-19|Ford Global Technologies, Llc|Bumper|
    CN109070821A|2016-04-22|2018-12-21|日产自动车株式会社|energy absorbing structure|
    FR3052720B1|2016-06-16|2019-05-03|Peugeot Citroen Automobiles Sa|VEHICLE HAVING REAR TRAIN INCLUDES AT LEAST ONE DETECTION DEVICE|
    JP6555221B2|2016-10-14|2019-08-07|トヨタ自動車株式会社|Bumper reinforcement and side member connection structure|
    JP6323533B2|2016-10-28|2018-05-16|マツダ株式会社|Vehicle shock absorption structure|
    CN206579590U|2016-12-23|2017-10-24|全耐塑料公司|Collision energy absorbing box for motor vehicle and the collision prevention girders including the collision energy absorbing box|
    FR3064567B1|2017-04-03|2021-04-23|Valeo Systemes Thermiques|ENERGY ABSORBER DEVICE FOR MOTOR VEHICLE BUMPER BEAM|
    FR3065263A1|2017-04-14|2018-10-19|Valeo Systemes Thermiques|ENERGY ABSORBER DEVICE AGENTS TO BE MOUNTED BETWEEN A BUMPER AND A LONGERON OF A MOTOR VEHICLE|
    US11148578B2|2018-03-25|2021-10-19|Maurice Paperi|Universal mounting tabs and kits for automotive components|
    JP6609658B2|2018-03-26|2019-11-20|株式会社Ｓｕｂａｒｕ|Bumper device for vehicle|
    TR201917284A2|2019-11-07|2021-05-21|Tofas Tuerk Otomobil Fabrikasi Anonim Sirketi|A SUPPORTED CRASH BOX|
    法律状态:
    2015-03-19| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-23| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-22| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1453160A|FR3019785B1|2014-04-09|2014-04-09|VEHICLE BUMPER BEAM, BUMPER ASSEMBLY AND VEHICLE THEREFOR|FR1453160A| FR3019785B1|2014-04-09|2014-04-09|VEHICLE BUMPER BEAM, BUMPER ASSEMBLY AND VEHICLE THEREFOR|
    EP15161742.0A| EP2930067B1|2014-04-09|2015-03-30|Bumper beam for a vehicle, associated bumper assembly and vehicle|
    ES15161742.0T| ES2627189T3|2014-04-09|2015-03-30|Vehicle bumper beam, associated bumper assembly and vehicle|
    US14/679,386| US20150291114A1|2014-04-09|2015-04-06|Vehicle Bumper Beam, Associated Bumper Beam Assembly and Vehicle|
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