• 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 invention relates to a unitary piece (10) forming a front block for a motor vehicle comprising a structural part (20) constituting an energy absorption system, and a semi-structural part (30) coming from molding forming at least one aerodynamic system (40), the semi-structural part (30) being overmolded on the structural part (20).
    公开号:FR3070665A1
    申请号:FR1758255
    申请日:2017-09-07
    公开日:2019-03-08
    发明作者:Stephane Ginja
    申请人:Plastic Omnium SA；
    IPC主号:
    专利说明:

    The present invention relates to the field of motor vehicles. In particular, the invention relates to a module for front blocks for motor vehicles.
    Already known in the prior art, in particular from document W02006 / 100379, a front unit of a motor vehicle comprising in particular a technical front face supporting functional elements such as a cooling system (radiator), a skin bumpers or optical elements, and an energy absorption system.
    An energy absorption system comprises at least one impact beam, for transmitting forces towards the side members of the vehicle. Such a beam is generally called "high impact beam" or "upper shock beam", and it is positioned in front of the technical front face. This system generally also includes a pedestrian impact protection system (high track absorber and low track stiffener).
    This front block structure therefore includes separate parts, each having distinct specificities, in particular the impact beam which provides a structural role, and the technical front panel which provides a more functional role. This can represent difficulties in assembling the parts in relation to each other and impose certain constraints on the style of the vehicle. For example, the style of the bumper skin is impacted by the positioning of the impact beam to prevent the impact beam from being seen from an air intake opening.
    In order to reduce CO2 emissions, one can also find in this environment one (or more) frame (generally made of plastic), on which movable elements are mounted, called air intake flaps. These elements are part of an active aerodynamic system in which an actuator controls the setting in motion of the mobile elements, the function of which is to authorize the flow of incoming air through the grids of the bumper and according to the configurations of vehicle speed, shut them off.
    This type of frame is assembled on the shock beam, below, above or below and above, which complicates the assembly of the various elements in the front unit.
    In addition, such a front unit architecture leads to a redundancy of certain functions, resulting in a multiplicity of parts, and therefore, an increase in the front unit. For example, the frame has horizontal walls, and the same is true for the air guides between the bumper skin and the cooling system. Another example also relates to the frame of the movable shutters: this frame acts as a structure for the movable shutters, while in this environment, the impact beam and the stiffener for the pedestrian low lane also act as a structure.
    It therefore appears that the known front blocks comprise a set of elements which it is necessary to assemble during a multitude of more or less complex steps during assembly on the vehicle, and that many functions performed by some of these elements are redundant, leading to assembly complexity and a heavier vehicle.
    The object of the present invention is in particular to propose a single piece, forming a module of the front block of a lighter vehicle and whose assembly is simplified. The invention thus relates to a single piece forming a front block module in which aerodynamic functions (frame for piloted flaps), associated with other surrounding aerodynamic functions (movable flaps), are integrated into the impact beam in a structural frame which is partly formed by the shock beam itself.
    The invention relates to a single piece forming a front unit for a motor vehicle comprising a structural part constituting an energy absorption system, and a semi-structural part from molding forming at least one aerodynamic system, the semi part -structural being overmolded on the structural part.
    The one-piece part forming a front block module according to the invention provides, among other things, the following advantages:
    a reduction in the number of parts on the vehicle, thus providing a compact system, a simplification of the logistics flow since there are fewer part references, and a simplification of assembly in the factory for the manufacturer (only one part to get on the vehicle);
    - a reduction in the purely aerodynamic function because less material is used, and the manufacture of redundant frame is avoided with the parts of the frame already designated in the existing parts for other functions. In addition, the reduction is also obtained by eliminating the fastenings between elements of the front unit. For example, the structure of the frames of the piloted shutters is produced by the one-piece part directly (the piloted shutters are directly clipped onto the one-piece part) and the semi-structural part can act directly as a partition and air guide.
    The one-piece part can also include one or more of the following characteristics, taken alone or in combination:
    - the aerodynamic system comprises, alone or in combination, at least one of the following elements: a frame for piloted shutters, an air guide, a deflector under the body, a faceplate;
    - the semi-structural part is capable of supporting at least one of the following functional elements: a cooling system, a bumper skin, an optical element;
    - the semi-structural part is made of thermoplastic material based on at least one of the following products: polypropylene (PP), polyamide (PA), polyethylene (PE), polycarbonate and polybutylene terephthalate (PC-PBT);
    - the thermoplastic material is reinforced by reinforcing elements;
    - The semi-structural part is made of bi-material, and includes lips of material of elastomer type;
    - the structural part includes at least one of the following elements: a shock beam bar, a crash box type shock absorber, a pedestrian impact protection system;
    - the structural part comprises a shock beam bar made of steel, aluminum or composite material.
    The invention also relates to a set of a single piece according to the invention and at least one of the following functional elements: a cooling system, a bumper skin, an optical element.
    The invention also relates to a method of manufacturing a single piece forming a front unit for a motor vehicle according to the invention in which the structural part constituting an energy absorption system is produced, then overmoulding by means a mold and a plastic material the semi-structural part on the structural part, so that the semi-structural part forms at least one aerodynamic system.
    The method can also include one or more of the following characteristics, taken alone or in combination:
    the mold is an injection mold;
    - the structural part is produced by producing a steel shock beam bar using a method chosen alone or in combination from the following methods: profiling (rollforming), hydroforming, cold stamping, hot stamping;
    - the structural part is produced by making an aluminum impact beam bar using a method chosen alone or in combination from the following methods: stamping, extrusion;
    - the structural part is produced by producing a shock beam bar in composite material by means of a method chosen alone or in combination from the following methods: thermocompression, stamping, extrusion, pultrusion;
    - the shock beam bar is introduced into the mold as an insert to be molded;
    - the mechanical adhesion between the structural part and the semistructural part is improved, by making holes in the structural part before overmolding, so that the overmolding plastic material flows through the holes;
    - the chemical adhesion between the structural part and the semistructural part is improved, by carrying out at least one of the following stages: an adhesive is added to the structural part before overmolding by powdering, spray, glue and / or film; adding an adhesive into a plastic resin, such as maleic anhydrous;
    - the semi-structural part is produced in a single overmolding step;
    - the semi-structural part is made of bi-material, at least one of the materials of which is an elastomer type material;
    - after the overmolding step, additional functions such as piloted shutters, motor mechanisms, wiring, electronics, sensors are assembled on the one-piece part.
    The invention will be better understood on reading the appended figures, which are provided by way of examples and have no limiting character, in which:
    - Figure 1 illustrates a first example of a structural part of a single piece forming a front unit module according to the invention;
    FIG. 2 illustrates a first example of a single piece forming a front block module according to the invention, comprising the structural part of FIG. 1;
    - Figure 3 illustrates a second example of a structural part of a single piece forming a front unit module according to the invention;
    FIG. 4 illustrates a second example of a single piece forming a front block module according to the invention, comprising the structural part of FIG. 3;
    FIG. 5 illustrates a third example of a single piece forming a front block module according to the invention;
    FIG. 6 illustrates the front of a motor vehicle, provided with a single piece according to the invention.
    As illustrated in Figures, 2, 4, 5 and 6, the single piece 10 according to the invention forms a front unit for a motor vehicle and comprises a structural part 20, and a semi-structural part 30.
    The structural part 20 comprises at least one of the following elements: a shock beam bar 22, a shock absorber of the “crash box” type 24, a pedestrian shock protection system 26 (high track absorber and bass track stiffener).
    When the structural part 20 comprises a shock beam bar 22, the latter is advantageously made of steel, aluminum or composite material.
    The structural part 20 constitutes an energy absorption system, as illustrated in FIGS. 1 and 3. An element capable of absorbing a shock suffered by the vehicle is called structural.
    The semi-structural part 30 came from molding, in particular by an injection molding process. During this injection molding, the semi-structural part 30 is overmolded on the structural part 20 thus forming an insert. Thus, the two parts, structural 20 and semi-structural 30, form a single monobloc piece 10. An element which supports secondary functions and is not intended to absorb shocks other than low energy shocks is termed semi-structural. (pedestrian impact and parking impact).
    The semi-structural part 30 forms at least one aerodynamic system 40. The term aerodynamic system means a set of shapes capable of fulfilling an aerodynamic function for the vehicle, or of contributing to such a function. Such shapes can thus correspond to an air guide, a frame for piloted shutters, or to a deflector under the body for example. The semi-structural part 30 therefore forms, by molding, at least one of these elements: frame for piloted shutters 42, air guide 44, underbody deflector 46.
    Thus, the piloted flaps used on the vehicle to regulate the air intake at the front of the vehicle are directly positioned on the semi-structural part 30 coming from molding (at the level of frame 42 coming from molding). It is therefore no longer necessary to mount them on a frame, itself assembled on the front unit. In addition, if the impact beam 22 recedes during an impact, the piloted flaps follow towards the rear of the vehicle.
    Thus, the semi-structural part forms useful elements for the overall aerodynamic system of the vehicle.
    According to one embodiment, the semi-structural part 30 supports at least one of the following functional elements 50, functional elements taken alone or in combination: a cooling system 52 (see FIG. 5), such as a radiator, a bumper skin 54 (see Figure 6), an optical element 56 (see Figure 6).
    According to one example, the single piece 10 incorporates bumper reinforcement functions. Part 10 can thus be advantageously preassembled with the bumper before supplying the vehicle manufacturer.
    According to one example, the single piece 10 incorporates functions for strengthening the rigidity of the bumper. The part 10 can thus advantageously integrate a faceplate 48.
    The part 10 thus allows better management of the diversity of the vehicle: for example, for a basic version of a vehicle, the piloted flaps 58 are not necessarily mounted on the part 10, and the frame 42 of the flaps piloted 58 present on the semi-structural part 30 then serves as an air guide towards the radiator. It is thus possible to envisage a move upmarket by post-assembly of components after the molding step.
    Advantageously, the semi-structural part 30 is made of thermoplastic material, for example a material based on at least one of the following products: polypropylene (PP), polyamide (PA), polyethylene (PE) , polycarbonate and polybutylene terephthalate (PC-PBT).
    The plastic material is advantageously reinforced by reinforcing elements such as: glass fibers, carbon or else mineral or natural fillers such as talc.
    FIG. 2 illustrates a first example of a single piece 10 forming a front unit module according to the invention. This part 10 comprises the structural part 20 illustrated in FIG. 1. As can be seen, the rigidity of the frames 42 of the piloted flaps 58 situated under the shock beam 22 is offered by the shock beam 22 in the upper part and the pedestrian stiffener in low way. The direct material link between high and low tracks offers better mechanical strength than an assembly which tends to cause stress concentrations.
    FIG. 4 illustrates a second example of a single piece 10 forming a front block module according to the invention. This part 10 comprises the structural part 20 illustrated in FIG. 3. The lower part of the part 10 serves as upper guide for the movable flaps, in particular if ribs are added, and in the lower part, the converging low channel makes it possible to guide the air between the bumper and the piloted shutters. The air intake surface is maximized, in particular on the top (beam) and the bottom (converging).
    FIG. 5 illustrates a third example of a single piece 10 forming a front block module according to the invention.
    The invention also relates to a method of manufacturing a single piece 10, forming a front unit for a motor vehicle according to the invention.
    According to this method, the structural part 20 constituting an energy absorption system is produced, then the semi-structural part 30 is molded using a mold and a plastic material onto the structural part 20. Overmolding is carried out so that the semi-structural part 30 forms at least one aerodynamic system 40.
    To carry out the overmolding, an injection mold is preferably used.
    The structural part 20 is produced by manufacturing at least one impact beam bar 22. Then this impact beam bar 22 is introduced into the mold as an insert to be overmolded. Different techniques can be used to manufacture the bar 22, depending on the material used.
    According to a first embodiment, the impact beam bar 22 is made of steel by means of a method chosen alone or in combination from the following methods: profiling (rollforming), hydroforming, cold stamping, hot stamping.
    According to a second embodiment, the impact beam bar 22 is made of aluminum by means of a method chosen alone or in combination from the following methods: stamping, extrusion.
    According to a third embodiment, the impact beam bar 22 is made of composite material by means of a method chosen alone or in combination from the following methods: thermocompression, stamping, extrusion, pultrusion.
    The picelO according to the invention thus constitutes a single piece, forming a front unit module in which aerodynamic functions are integrated into the shock beam in a structural frame which is partly formed by the shock beam itself.
    It is therefore important that the structural part 20 and the semi-structural part 30 have significant cohesion, so as not to dissociate in the event of an impact from the vehicle in particular.
    To do this, according to one embodiment, the mechanical adhesion between the structural part 20 and the semi-structural part 30 is improved, by making orifices in the structural part 20 before overmolding, so that the plastic material overmolding flue through the orifices.
    To improve the cohesion between the two parts, it is also possible, alternatively or in addition, to improve the chemical adhesion between the structural part 20 and the semi-structural part 30, by performing at least one of the following steps:
    - An adhesive is added to the structural part 20 before overmolding by dusting, spray, glue and / or film;
    - an adhesive is added in a resin of the plastic, such as maleic anhydrous.
    According to one embodiment, the semi-structural part 30 is produced in a single step, during injection. In other words, all the functions carried by the semi-structural part 30 are molded at the same time. Thus, different functions are integrated directly into the one-piece part, without additional assembly. It is thus possible during the single overmolding step, to overmold sensor supports, air guides coming from molding, the frame for the movable shutters, etc. without this necessitating fixing additional supports.
    According to a second embodiment, the semi-structural part 30 is made of bi-material, during the injection step. This mode has the advantage of being able to integrate flexible lips which promote sealing with the bumper and / or the engine cooling system. The flexible lips can be made of an elastomer type material.
    Of course, it is also envisaged to complete the functions of the one-piece part 10 with assembled elements 50 subsequently to the overmolding step, such as: piloted flaps 58, motor mechanisms, wiring, electronics, sensors ...
    NOMENCLATURE: monobloc part forming a front unit for a motor vehicle: structural part of the monobloc part 10: shock beam bar of the structural part 20: shock absorber of the “crash box” type of the structural part 20: shock protection system pedestrians of the structural part 20: semi-structural part of the monobloc part 10: aerodynamic system of the semi-structural part 30: frame for piloted shutters 42 of the aerodynamic system 40: air guide 44 of the aerodynamic system 40: underfloor deflector of the aerodynamic system 40: faceplate of the monobloc part 10: functional elements 50 supported by the semi-structural part 30, assembled on the part 10, subsequent to the overmolding step: cooling system of the functional elements 50: skin of the barrier shocks of the functional elements 50: optical element of the functional elements 50: piloted shutters
    权利要求:
    Claims (20)
    [1" id="c-fr-0001]
    1. Monobloc part (10) forming a front unit for a motor vehicle comprising a structural part (20) constituting an energy absorption system, and a semi-structural part (30) coming from molding forming at least one aerodynamic system ( 40), the semi-structural part (30) being overmolded on the structural part (20).
    [2" id="c-fr-0002]
    2. Part (10) according to the preceding claim, in which the aerodynamic system (40) comprises alone or in combination at least one of the following elements: a frame for piloted shutters (42), an air guide (44) , an underbody deflector (46), a faceplate (48).
    [3" id="c-fr-0003]
    3. Part (10) according to one of the preceding claims, in which the semistructural part (30) is capable of supporting at least one of the following functional elements (50): a cooling system (52), a skin of bumper (54), an optical element (56).
    [4" id="c-fr-0004]
    4. Part (10) according to one of the preceding claims, in which the semistructural part (30) is made of thermoplastic material based on at least one of the following products: polypropylene (PP), polyamide (PA), polyethylene (PE), polycarbonate and polybutylene terephthalate (PC-PBT).
    [5" id="c-fr-0005]
    5. Piece (10) according to the preceding claim, wherein the thermoplastic material is reinforced by reinforcing elements.
    [6" id="c-fr-0006]
    6. Part (10) according to one of the preceding claims, in which the semistructural part (30) is made of bi-material, and comprises lips of material of elastomer type.
    [7" id="c-fr-0007]
    7. Part (10) according to one of the preceding claims, in which the structural part (20) comprises at least one of the following elements: a shock beam bar (22), a shock absorber of the “crash box” type >> (24), a pedestrian impact protection system (26).
    [8" id="c-fr-0008]
    8. Part (10) according to one of the preceding claims, in which the structural part (20) comprises a shock beam bar (22) made of steel, aluminum or composite material.
    [9" id="c-fr-0009]
    9. An assembly of a part (10) according to one of the preceding claims and of at least one of the following functional elements (50): a cooling system (52), a bumper skin (54) , an optical element (56).
    [10" id="c-fr-0010]
    10. A method of manufacturing a single piece (10) forming a front unit for a motor vehicle according to one of claims 1 to 8, in which the structural part (20) constituting an energy absorption system is produced, then the semi-structural part (30) is molded using a mold and a plastic material onto the structural part (20), so that the semi-structural part (30) forms at least one aerodynamic system (40).
    [11" id="c-fr-0011]
    11. Method according to the preceding claim, wherein the mold is an injection mold.
    [12" id="c-fr-0012]
    12. Method according to one of claims 10 and 11, in which the structural part (20) is produced by producing a shock beam bar (22) in steel by means of a method chosen alone or in combination from the following methods: profiling, hydroforming, cold stamping, hot stamping.
    [13" id="c-fr-0013]
    13. Method according to one of claims 10 and 11, in which the structural part (20) is produced by producing an impact beam bar (22) in aluminum by means of a method chosen alone or in combination from the following methods: stamping, extrusion.
    [14" id="c-fr-0014]
    14. Method according to one of claims 10 and 11, in which the structural part (20) is produced by producing a shock beam bar (22) in composite material by means of a method chosen alone or in combination from the following methods : thermocompression, stamping, extrusion, pultrusion.
    [15" id="c-fr-0015]
    15. Method according to one of claims 10 to 14, wherein the impact beam bar (22) is introduced into the mold as an insert for overmolding.
    [16" id="c-fr-0016]
    16. Method according to one of claims 10 to 15, in which the mechanical adhesion between the structural part (20) and the semi-structural part (30) is improved, by producing orifices in the structural part (20) before overmolding, so that the plastic overmolding material flows through the orifices.
    [17" id="c-fr-0017]
    17. Method according to one of claims 10 to 16, in which the chemical adhesion between the structural part (20) and the semi-structural part (30) is improved, by performing at least one of the following steps:
    - An adhesive is added to the structural part (20) before overmolding by dusting, spray, glue and / or film;
    - we add an adhesive in a plastic resin, such as maleic anhydrous.
    [18" id="c-fr-0018]
    18. Method according to one of claims 10 to 17, in which the semi-structural part (30) is produced in a single overmolding step.
    [19" id="c-fr-0019]
    19. Method according to one of claims 10 to 18, wherein the semi-structural part (30) is made of bi-material of which at least one of the materials is a material of elastomer type.
    [20" id="c-fr-0020]
    20. Method according to one of claims 10 to 19, in which after the overmolding step, additional functions (50) are assembled on the monobloc part (10) such as piloted flaps (58), motor mechanisms, wiring, electronics, sensors.
    类似技术:
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    CN109466634A|2019-03-15|
    JP2019051931A|2019-04-04|
    US20190071130A1|2019-03-07|
    FR3070665B1|2019-09-13|
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    引用文献:
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    法律状态:
    2018-09-26| PLFP| Fee payment|Year of fee payment: 2 |
    2019-03-08| PLSC| Search report ready|Effective date: 20190308 |
    2019-09-27| PLFP| Fee payment|Year of fee payment: 3 |
    2020-09-29| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1758255|2017-09-07|
    FR1758255A|FR3070665B1|2017-09-07|2017-09-07|MONOBLOCK PIECE FORMING A FRONT BLOCK COMPRISING AN ABSORPTION SYSTEM AND AERODYNAMIC SYSTEM|FR1758255A| FR3070665B1|2017-09-07|2017-09-07|MONOBLOCK PIECE FORMING A FRONT BLOCK COMPRISING AN ABSORPTION SYSTEM AND AERODYNAMIC SYSTEM|
    JP2018164977A| JP2019051931A|2017-09-07|2018-09-04|Monobloc part forming front bloc comprising absorption system and aerodynamic system|
    RU2018131698A| RU2711181C1|2017-09-07|2018-09-04|One-piece part of front unit for vehicle, assembly of monoblock part of front unit for vehicle and method of manufacturing monoblock part of front unit for vehicle|
    BR102018067910-4A| BR102018067910A2|2017-09-07|2018-09-05|MONOBLOCK PART, ONE-PIECE SET, AND METHOD FOR MANUFACTURING A MONOBLOCK PART|
    CN201811036643.6A| CN109466634A|2017-09-07|2018-09-06|Form the single component of the front chunking including absorption system and aerodynamic system|
    KR1020180106550A| KR102283037B1|2017-09-07|2018-09-06|Monobloc part forming a front bloc comprising an absorption system and an aerodynamic system|
    US16/124,703| US11059520B2|2017-09-07|2018-09-07|Monobloc part forming a front bloc comprising an absorption system and an aerodynamic system|
    EP18193228.6A| EP3453597B1|2017-09-07|2018-09-07|Single-piece unit forming a front unit having an absorption system and an aerodynamic system|
    ES18193228T| ES2824810T3|2017-09-07|2018-09-07|One-piece piece that forms a front block that includes an absorption system and an aerodynamic system|
    ARP180102559A| AR112960A1|2017-09-07|2018-09-07|MONOBLOCK PART THAT FORMS A FRONT BLOCK INCLUDING AN ABSORPTION SYSTEM AND AN AERODYNAMIC SYSTEM|
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