WO2020007727A1 - Vehicle boot lid structure device - Google Patents

Vehicle boot lid structure device Download PDF

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Publication number
WO2020007727A1
WO2020007727A1 PCT/EP2019/067337 EP2019067337W WO2020007727A1 WO 2020007727 A1 WO2020007727 A1 WO 2020007727A1 EP 2019067337 W EP2019067337 W EP 2019067337W WO 2020007727 A1 WO2020007727 A1 WO 2020007727A1
Authority
WO
WIPO (PCT)
Prior art keywords
reinforcing element
hollow
hollow reinforcing
rear window
trunk door
Prior art date
Application number
PCT/EP2019/067337
Other languages
French (fr)
Inventor
Olivier Glaumot
Original Assignee
Renault S.A.S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault S.A.S filed Critical Renault S.A.S
Priority to KR1020217003774A priority Critical patent/KR20210028690A/en
Priority to CN201980040823.8A priority patent/CN112351900A/en
Priority to BR112020025703-6A priority patent/BR112020025703A2/en
Priority to JP2021500036A priority patent/JP7458364B2/en
Priority to EP19733799.1A priority patent/EP3817936A1/en
Publication of WO2020007727A1 publication Critical patent/WO2020007727A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/10—Doors arranged at the vehicle rear
    • B60J5/101—Doors arranged at the vehicle rear for non-load transporting vehicles, i.e. family cars including vans
    • B60J5/107—Doors arranged at the vehicle rear for non-load transporting vehicles, i.e. family cars including vans constructional details, e.g. about door frame, panels, materials used, reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • 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
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1706—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using particular fluids or fluid generating substances
    • B29C2045/1707—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using particular fluids or fluid generating substances using a liquid, e.g. water
    • B29C2045/1708—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using particular fluids or fluid generating substances using a liquid, e.g. water removing the liquid from the hollow

Definitions

  • the invention relates to a door structure device for a motor vehicle trunk.
  • the invention also relates to a method for producing such a structural device.
  • the invention also relates to a trunk door of a motor vehicle comprising such a door structure device.
  • the invention relates to a vehicle body and to a motor vehicle comprising such a door structure device.
  • plastic trunk doors are generally equipped with steel reinforcements to compensate for the lack of intrinsic stiffness of the plastic material.
  • These metal reinforcements generally include several heavy assembled elements which have geometric defects causing deformations on the trunk door during assembly.
  • the object of the invention is to provide a trunk structure device for a motor vehicle overcoming the above drawbacks and improving the structural elements known from the prior art.
  • the invention makes it possible to produce a structure device or a trunk door which is simple, light, reliable and the manufacture of which requires a reduced number of manufacturing steps.
  • the present invention consists of a door structure device for a motor vehicle trunk comprising: a lower part intended to be covered with an exterior body panel and an upper part forming a rear window frame intended for be covered by a rear window frame; and also comprising at least one hollow reinforcing element extending from the lower part to the upper part; the hollow reinforcing element being produced by fluid-assisted injection.
  • said device is made in one piece by injection of plastic material.
  • the at least one hollow reinforcing element projects relative to the lower part and / or to the upper part.
  • the at least one hollow reinforcing element projects from the outside of the lower part and / or from the upper part.
  • the hollow reinforcing element has a rectangular section, preferably a square section.
  • the at least one hollow reinforcement element forms a peripheral frame at least partially framing the rear window frame and / or in which the at least one hollow reinforcement element forms a peripheral frame at least partially framing the device.
  • said device also comprises a continuous fixing track comprising a face of the at least one hollow reinforcing element; said fixing track being arranged on the interior side of the device.
  • the invention relates to a method for producing a device according to the first aspect of the invention.
  • the method includes a plastic injection step for the production of the lower part and the upper part.
  • the method also includes a fluid assisted plastic injection step for the production of the at least one hollow reinforcing element extending from the bottom to the top.
  • the fluid used for injecting the at least one hollow reinforcing element is a gas or a liquid, preferably water.
  • an additional reinforcement means made of plastic material is attached, in particular attached by overmolding, to the rest of the device.
  • the invention relates to a trunk door of a motor vehicle comprising a vehicle trunk door structure device according to the first aspect of the invention and a rear window frame. Said rear window frame overlaps the rear window frame of said device. The superposition of the rear window frame and the device forms a second hollow body extending over at least a portion of the length of the at least one hollow reinforcement element.
  • said trunk door comprises a trunk door structure device according to the first aspect of the invention and at least one sealing element fixed to the at least one hollow reinforcing element.
  • said trunk door comprises a trunk door structure device according to one of the first aspect of the invention and at least one additional plastic reinforcement means connecting the upper part to the lower part and comprising a hollow tube and overmolded fasteners at the longitudinal ends of the hollow tube.
  • the invention relates to a motor vehicle body comprising a trunk door according to the first aspect of the invention.
  • Said box comprises a sealing element being in contact with at least one hollow reinforcing element or with at least one fixing track when the boot door is closed.
  • the invention relates to a vehicle, in particular a motor vehicle, comprising a door structure device for a vehicle trunk the first aspect of the invention or a motor vehicle body according to the fourth aspect of the invention.
  • Figure 1 shows the outer side of an embodiment of a trunk door structure device of a motor vehicle.
  • Figure 2 shows the outer side of an embodiment of a trunk door structure device according to Figure 1 on which is mounted a rear window frame.
  • FIG. 3 represents the interior side of a trunk door structure device according to FIG. 1.
  • Figure 4A shows a sectional view along a plane A of the part of a trunk door according to an embodiment of the invention comprising the device according to Figure 3 and a seal.
  • Figure 4B is a diagram of a sectional view along a plane B of the trunk door in an embodiment where the cooperation between the upper part and the scope frame forms a second hollow body.
  • FIG. 5 represents an embodiment of an additional reinforcing element which can be mounted on a device according to FIG. 1.
  • FIG. 6 is an exploded view of an embodiment of a trunk door of a vehicle according to an embodiment of the invention.
  • FIG. 7 represents an embodiment of a vehicle comprising a trunk door.
  • lower part the part lying down relative to a vehicle when the trunk door 1 1 is in the closed position.
  • upper part means the part located upward relative to a vehicle when the trunk door 1 1 is in the closed position.
  • the lower and upper parts are respectively below and above a lower edge of the rear window when the boot door is in the closed position.
  • interior side the face of an element intended to be oriented towards the interior of the passenger compartment of a vehicle when the boot door is in the closed position.
  • exit side designates the face of an element intended to be oriented towards the exterior of the passenger compartment of a vehicle when the boot door 1 1 is in the closed position.
  • the concept of the invention lies in the incorporation of a hollow reinforcing element extending along a vehicle trunk door structure device to increase the rigidity of the structure device.
  • the structural device then makes it possible to increase the inertia in the stressed sections.
  • An example of a door structure device 1 for a motor vehicle boot is described below with reference to FIG. 1.
  • the invention relates in particular to a device 1 intended to be covered to form a boot door 11 for a vehicle , especially for a motor vehicle.
  • the device 1 can be a door casing or a trunk door structure element.
  • the device 1 can be a boot lining, preferably a tailgate boot door.
  • the device 1 comprises a first part constituting a support comprising a lower part 1 b extended upwards by an upper part 1 a.
  • the lower part 1b is intended to be covered by a bodywork element.
  • the upper part 1 has a rear window frame 4 intended to be covered by a rear window frame 6 of the vehicle trunk door.
  • the device 1 further comprises at least one hollow reinforcement element 2.
  • the at least one hollow reinforcement element 2 extends from the lower part 1 b to the upper part 1 a.
  • the hollow reinforcing element 2 extends over the lower and upper parts.
  • the hollow reinforcing element 2 may consist of a longitudinal element disposed continuously or discontinuously on the periphery of the device 1 so as to stiffen the device 1.
  • the at least one hollow reinforcing element 2 create a belt on at least a portion of the periphery of the device 1, this belt connecting the lower part 1 b and the upper part 1 a.
  • at least one portion is meant here at least 25% or at least 50%.
  • the at least one hollow reinforcing element 2 can extend at a distance from the lateral, lower or upper edges of the device 1 which is between 1 cm and 20 cm, preferably between 5 cm and 15 cm.
  • the at least one hollow reinforcement element 2 can extend longitudinally over a length of between 50 cm and 350 cm, preferably between 150 cm and 250 cm.
  • the hollow reinforcing element 2 here acts as a stiffening beam.
  • the use of plastic and the hollow shape of the reinforcing element make it possible to improve shock absorption, in particular impact between the boot door 1 1 comprising the device 1 and the vehicle body during the closing the boot door 1 1.
  • the reinforcing element can extend linearly or longitudinally.
  • the reinforcing element extends linearly over at least a portion of the contours of the support or over at least a portion of the contours of the assembly formed by the lower part 1 b and the upper part 1 a.
  • the at least one hollow reinforcement element 2 can comprise, as illustrated in FIG. 1, at least two hollow reinforcement elements.
  • the at least one hollow reinforcing element 2 can thus comprise discontinuities.
  • the at least one hollow reinforcing element 2 thus extends continuously or semi-continuously.
  • the hollow reinforcing element 2 thus extends so as to form at least partially a stiffening ring.
  • the hollow reinforcing element 2 comprises at least a first lower portion disposed along the lower edge of the lower part 1b.
  • the hollow reinforcing element 2 comprises at least a second upper portion disposed along the lateral edges of the support from the lower part 1 b to the upper part 1 a.
  • the hollow reinforcing element 2 can extend along the upper part 1 a along the edges forming the rear window frame 4.
  • the device 1 comprises two hollow reinforcing elements arranged symmetrically on the support.
  • the two symmetrical hollow reinforcing elements can join along the lower edge of the lower part 1b and / or can join along the top part 3 of the rear window frame 4.
  • top part here is meant the upper edge of the upper part 1a or of the frame of the rear window.
  • the hollow reinforcing element 2 has a section of parallelepiped shape and extends longitudinally on 4 faces.
  • the hollow reinforcing element 2 has a square shape.
  • the reinforcing element can therefore be presented as a hollow surrounded by 4 faces and extending longitudinally.
  • the length of the faces 2a, 2b can vary between 0.5 cm and 5 cm, preferably between 2 cm and 4 cm inclusive.
  • the cross section of the hollow reinforcing element can be between a circle of A mm in diameter and a circle of B mm in diameter.
  • the geometry of the cross section of the reinforcing element can be constant along the reinforcing element. Alternatively, the geometry of the cross section of the reinforcing element can evolve along the reinforcing element.
  • one of the faces 2a of the section of the hollow reinforcing element 2 can be intended to receive a sealing element 7.
  • the face 2a of the section intended to receive the element sealing 7 is the face 2a oriented towards the inside of the support.
  • the other three faces 2b preferably extend projecting from the outside of the support.
  • the face 2a of the at least one hollow reinforcing element 2 oriented towards the interior side of the support thus makes it possible to define a fixing track 71 for at least one sealing element 7 in one piece.
  • This arrangement also makes it possible to better stabilize the sealing element 7 such as a sealing gasket in order to guarantee the tightness of the trunk door 1 1, whatever the temperature.
  • the connection track 71 makes it possible to connect two hollow reinforcement elements 2 so as to form a continuous track around the support.
  • the fixing track allows the installation of a sealing element 7 in one piece.
  • the hollow reinforcing element 2 is discontinuous and the fixing track 71 is continuous.
  • the fixing track 71 can extend along the hollow reinforcing element 2 and between the discontinuities of said hollow reinforcing element 2.
  • the fixing track 71 may comprise bands between the discontinuities of the at least one hollow reinforcing element 2. These bands allow the continuity of the fixing track 71 to allow the fitting of a sealing element 7 of a in one piece.
  • the sealing element 7 in one piece advantageously allows better performance and a reduction in manufacturing time.
  • the fixing track 71 can thus be partially produced by molding during the manufacture of the device 1. Thus, no additional manufacturing step is added.
  • the lower part 1b of the support comprises an interior side and an exterior side.
  • the outer side is intended to be covered by superposition of an exterior body panel 8.
  • the lower part 1b further comprises stiffening elements (5a, 5b, 5c). These stiffening elements are obtained by molding plastic material to produce the support. These stiffening elements allow the attachment of functional members.
  • At least one first stiffening element 5a authorizes the fixing of a locking device.
  • At least one second stiffening element 5b authorizes the fixing of a lighting device.
  • a third stiffening element 5c allows the attachment of a wiper device.
  • the upper part 1 a of the support forms a rear window frame 4.
  • This upper part 1 a is intended to be covered by superposition of a rear window frame 6.
  • the window frame and the exterior body panel 8 are intended to be arranged adjacent to the same side of the device 1, preferably touching each other.
  • the hollow reinforcing element 2 is produced by fluid-assisted injection.
  • the fluid used to create the hollow reinforcing element 2 can be a gas or a liquid such as water.
  • the device 1 comprising the support and the hollow reinforcing element 2 is produced in a single piece.
  • the device 1 is produced by injection of plastic material and the hollow of the hollow reinforcing element 2 is produced by injection assisted by fluid.
  • the invention thus overcomes the steps of fixing metallic elements to the support to stiffen a trunk door lining 11.
  • the method for the manufacture of such a device 1 for the vehicle trunk door structure may include a plastic injection step for producing the support or for producing in a single piece the lower part 1 b and the upper part 1 a.
  • the method also includes a fluid-assisted plastic injection step for producing the at least one hollow reinforcing element 2. This step can be part of the previous injection step.
  • the invention also relates to a trunk door 11 for a vehicle, in particular for a motor vehicle.
  • the trunk door 11 comprises a device 1 for the door structure as described above.
  • the trunk door 11 also includes a rear window frame 6 and an exterior body panel 8.
  • the bezel frame 6 overlaps the rear window frame 4 of the device 1.
  • the bezel frame 6 covers the device 1 on the outside of the device 1.
  • the frame 6 and the device 1 form a second hollow body 61.
  • the bezel frame 6 is designed to cooperate with the outer side of the upper part so as to create a second hollow body 61 between the bezel frame 6 and the upper part 1a.
  • the second hollow body 61 advantageously extends along the hollow body 21 formed by the hollow reinforcing element 2.
  • the trunk door 11 thus comprises a double hollow body increasing the rigidity of the trunk door 11.
  • the structural device then allows to increase the inertia in the stressed sections compared to a similar steel device without changing these external dimensions.
  • the top part 3 of the rear window frame 4 is intended to receive at least one articulation hinge.
  • the articulation hinge makes it possible to link the boot door 11 in rotation with the vehicle frame.
  • the other side of the top part 3 can be intended to receive an element improving the aerodynamics of the vehicle such as a spoiler 10 or a spoiler.
  • the trunk door 1 1 may include an element for improving the aerodynamics of the vehicle such as a spoiler 10 or a spoiler.
  • the trunk door 1 1 comprises an exterior body panel 8.
  • the exterior body panel 8 is arranged so as to cover the lower part 1 b of the structural device.
  • the exterior body panel 8 can be arranged adjacent to the rear window frame 6.
  • the exterior body panel 8 can be disposed substantially flush with the rear window frame 6.
  • the trunk door 1 1 may comprise a sealing element 7 or a sealing gasket fixed to the hollow reinforcing element 2 or to the fixing track 71 of the device.
  • the sealing element 7 consists of a single piece in order to simplify the steps of manufacturing said trunk door 1 1.
  • the sealing element 7 is fixed on the inside of said device, preferably on the fixing track 71.
  • the trunk door 1 1 comprises at least one additional reinforcement means 9 made of plastic.
  • FIG. 5 An example of such an additional plastic reinforcement means 9 is illustrated in FIG. 5.
  • This additional plastic reinforcement means 9 comprises a hollow longitudinal tube 9a.
  • the hollow longitudinal tube 9a is a fluid-assisted injected part in order to generate directly during injection, a hollow body, while making it possible to obtain a part of sufficient stiffness.
  • the additional plastic reinforcement means 9 may also include fixing elements 9b, 9c at the longitudinal ends of the hollow tube 9a. These fastening elements 9b, 9c preferably comprise orifices opening out to cooperate with nuts or screws. In this embodiment, the additional reinforcement means 9 is screwed onto the device 1 according to the invention.
  • the fastening elements 9b, 9c are molded onto the hollow longitudinal tube 9a by injection of plastic material.
  • the additional plastic reinforcement means 9 can thus consist of several plastic parts of sufficiently high stiffness and without the use of metal parts.
  • the additional plastic reinforcement means 9 can be arranged on the inside of the door structure device.
  • the additional plastic reinforcement means 9 makes it possible to reinforce the rigidity and the resistance to irreversible deformation of the boot door 11.
  • the at least one additional plastic reinforcement means 9 extends from the lower part 1 b of the device 1 to the upper part 1 a of the device 1.
  • the at least one additional plastic reinforcement means 9 is fixed to the upper part 1a and / or to the lower part 1b of the device by the fixing elements 9b, 9c present at the longitudinal ends of the hollow tube 9a.
  • the additional plastic reinforcement means 9 is preferably overmolded on the upper part 1 a and / or on the lower part 1 b of the device.
  • the fastening elements 9b, 9c then preferably comprise through orifices or other conformations allowing their overmolding on the rest of the device 1.
  • the advantage of such an additional plastic reinforcement means 9 is to produce a part in a single operation.
  • Such additional plastic reinforcement means produced by molding also has fewer geometric defects than a similar piece made of steel.
  • the use of plastic makes it possible to refrain from any anti-corrosion treatment of the part compared to a similar steel part.
  • the additional reinforcement means 9 and the hollow reinforcement element 2 allow the trunk door 1 1 better geometric stability and better temperature resistance due to the positioning of the additional plastic reinforcement means 9 and the hollow reinforcement element 2 on the device 1.
  • the trunk door 1 1 may also include at least one lighting device at least one wiper device or at least one locking device inserted or fixed in the stiffening elements of the lower part 1 b.
  • the present invention also consists of a motor vehicle body comprising a trunk door structure device as described above.
  • the vehicle body may include a seal arranged so as to abut with the at least one hollow reinforcing element 2 or with the fixing track 71 when the trunk door 1 1 is in the closed position.
  • the invention also consists of a vehicle 12 comprising a device 1 for the trunk door structure as described above, comprising a trunk door 1 1 as described above or a vehicle body as described above .
  • the vehicle 12 comprises a trunk door 1 1 comprising a device 1 according to the invention, a rear window frame 6 and an exterior body panel 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Superstructure Of Vehicle (AREA)
  • Seal Device For Vehicle (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The invention relates to a motor vehicle boot lid structure device (1) comprising: a lower part (1b) intended to be covered with an exterior bodywork panel and an upper part (1a) forming a rear window casing (4) intended to be covered by a rear window frame; and at least one hollow reinforcing element (2) extending from the lower part (1b) to the upper part (1a).

Description

DISPOSITIF DE STRUCTURE DE PORTE DE COFFRE DE VÉHICULE  VEHICLE TRUNK DOOR STRUCTURE DEVICE
L’invention concerne un dispositif de structure de porte pour un coffre de véhicule automobile. L’invention porte aussi sur un procédé de réalisation d’un tel dispositif de structure. L’invention porte également sur une porte de coffre d’un véhicule automobile comprenant un tel dispositif de structure de porte. L’invention porte enfin sur une caisse de véhicule et sur un véhicule automobile comprenant un tel dispositif de structure de porte. Dans le but d’une réduction de la masse des véhicules automobiles, les métaux utilisés pour les portes de coffres sont de plus en plus remplacés par des matériaux plastiques. The invention relates to a door structure device for a motor vehicle trunk. The invention also relates to a method for producing such a structural device. The invention also relates to a trunk door of a motor vehicle comprising such a door structure device. Finally, the invention relates to a vehicle body and to a motor vehicle comprising such a door structure device. With the aim of reducing the mass of motor vehicles, the metals used for trunk doors are increasingly being replaced by plastic materials.
Cependant, l’utilisation de matériaux plastiques en remplacement de l’acier dans une conception similaire pose des problèmes de raideur. Notamment, ceci est dû à l’écart de module d’Young existant entre les matériaux plastiques et les aciers. However, the use of plastic materials to replace steel in a similar design poses stiffness problems. In particular, this is due to the difference in Young's modulus existing between plastic materials and steels.
C’est pourquoi les portes de coffre en plastique sont généralement équipées de renforts en acier pour palier au manque de raideur intrinsèque du matériau plastique. Ces renforts métalliques comprennent généralement plusieurs éléments assemblés lourds et qui présentent des défauts géométriques engendrant des déformées sur la porte de coffre lors de l’assemblage. This is why plastic trunk doors are generally equipped with steel reinforcements to compensate for the lack of intrinsic stiffness of the plastic material. These metal reinforcements generally include several heavy assembled elements which have geometric defects causing deformations on the trunk door during assembly.
Le but de l’invention est de fournir un dispositif de structure de coffre pour un véhicule automobile remédiant aux inconvénients ci-dessus et améliorant les éléments de structures connus de l’art antérieur. En particulier, l’invention permet de réaliser un dispositif de structure ou une porte de coffre qui soit simple, léger, fiable et dont la fabrication nécessite un nombre réduit d’étapes de fabrication. Selon un premier aspect, la présente invention consiste en un dispositif de structure de porte pour un coffre de véhicule automobile comprenant : une partie inférieure destinée à être recouverte d’un panneau extérieur de carrosserie et une partie supérieure formant un encadrement de lunette arrière destinée à être recouverte par un cadre de lunette arrière ; et comprenant également au moins un élément de renfort creux s’étendant depuis la partie inférieure jusqu’à la partie supérieure ; l’élément de renfort creux étant réalisé par injection assistée par fluide. The object of the invention is to provide a trunk structure device for a motor vehicle overcoming the above drawbacks and improving the structural elements known from the prior art. In particular, the invention makes it possible to produce a structure device or a trunk door which is simple, light, reliable and the manufacture of which requires a reduced number of manufacturing steps. According to a first aspect, the present invention consists of a door structure device for a motor vehicle trunk comprising: a lower part intended to be covered with an exterior body panel and an upper part forming a rear window frame intended for be covered by a rear window frame; and also comprising at least one hollow reinforcing element extending from the lower part to the upper part; the hollow reinforcing element being produced by fluid-assisted injection.
Dans un mode de réalisation, ledit dispositif est réalisé en une seule pièce par injection de matière plastique. In one embodiment, said device is made in one piece by injection of plastic material.
Dans un mode de réalisation, le au moins un élément de renfort creux fait sailli par rapport à la partie inférieure et/ou à la partie supérieure. In one embodiment, the at least one hollow reinforcing element projects relative to the lower part and / or to the upper part.
Dans un mode de réalisation, le au moins un élément de renfort creux fait sailli du côté extérieur de la partie inférieure et/ou de la partie supérieure. In one embodiment, the at least one hollow reinforcing element projects from the outside of the lower part and / or from the upper part.
Dans un mode de réalisation, l’élément de renfort creux présente une section parallélépipédique, préférentiellement une section carrée. In one embodiment, the hollow reinforcing element has a rectangular section, preferably a square section.
Dans un mode de réalisation, le au moins un élément de renfort creux forme un cadre périphérique encadrant au moins partiellement l’encadrement de lunette arrière et/ou dans lequel le au moins un élément de renfort creux forme un cadre périphérique encadrant au moins partiellement le dispositif. In one embodiment, the at least one hollow reinforcement element forms a peripheral frame at least partially framing the rear window frame and / or in which the at least one hollow reinforcement element forms a peripheral frame at least partially framing the device.
Dans un mode de réalisation, ledit dispositif comprend également une piste de fixation continue comprenant une face du au moins un élément de renfort creux ; ladite piste de fixation étant agencée sur le côté intérieur du dispositif. Selon un deuxième aspect, l’invention concerne un procédé de réalisation d’un dispositif selon le premier aspect de l’invention. In one embodiment, said device also comprises a continuous fixing track comprising a face of the at least one hollow reinforcing element; said fixing track being arranged on the interior side of the device. According to a second aspect, the invention relates to a method for producing a device according to the first aspect of the invention.
Ledit procédé comprend une étape d’injection plastique pour la production de la partie inférieure et de la partie supérieure. Ledit procédé comprend également une étape d’injection plastique assistée par fluide pour la production du au moins un élément de renfort creux s’étendant depuis la partie inférieure jusqu’à la partie supérieure. Dans un mode de réalisation, le fluide utilisé pour l’injection du au moins un élément de renfort creux est un gaz ou un liquide, préférentiellement de l’eau. The method includes a plastic injection step for the production of the lower part and the upper part. The method also includes a fluid assisted plastic injection step for the production of the at least one hollow reinforcing element extending from the bottom to the top. In one embodiment, the fluid used for injecting the at least one hollow reinforcing element is a gas or a liquid, preferably water.
Dans un mode de réalisation, un moyen de renfort additionnel en matériau plastique est rapporté, notamment rapporté par surmoulage, sur le reste du dispositif. In one embodiment, an additional reinforcement means made of plastic material is attached, in particular attached by overmolding, to the rest of the device.
Selon un troisième aspect, l’invention concerne une porte de coffre d’un véhicule automobile comprenant un dispositif de structure de porte de coffre de véhicule selon le premier aspect de l’invention et un cadre de lunette arrière. Ledit cadre de lunette arrière recouvre par superposition l’encadrement de lunette arrière dudit dispositif. La superposition du cadre de lunette arrière et du dispositif forme un deuxième corps creux s’étendant sur au moins une portion de la longueur du au moins un élément de renfort creux. According to a third aspect, the invention relates to a trunk door of a motor vehicle comprising a vehicle trunk door structure device according to the first aspect of the invention and a rear window frame. Said rear window frame overlaps the rear window frame of said device. The superposition of the rear window frame and the device forms a second hollow body extending over at least a portion of the length of the at least one hollow reinforcement element.
Dans un mode de réalisation, ladite porte de coffre comprend un dispositif de structure de porte de coffre selon le premier aspect de l’invention et au moins un élément d’étanchéité fixé sur le au moins un élément de renfort creux. Dans un mode de réalisation, ladite porte de coffre comprend un dispositif de structure de porte de coffre selon l'une le premier aspect de l’invention et au moins un moyen de renfort additionnel plastique reliant la partie supérieure à la partie inférieure et comprenant un tube creux et des éléments de fixation surmoulées aux extrémités longitudinales du tube creux. In one embodiment, said trunk door comprises a trunk door structure device according to the first aspect of the invention and at least one sealing element fixed to the at least one hollow reinforcing element. In one embodiment, said trunk door comprises a trunk door structure device according to one of the first aspect of the invention and at least one additional plastic reinforcement means connecting the upper part to the lower part and comprising a hollow tube and overmolded fasteners at the longitudinal ends of the hollow tube.
Selon un quatrième aspect, l’invention concerne une caisse de véhicule automobile comprenant une porte de coffre selon le premier aspect de l’invention. Ladite caisse comprend un élément d’étanchéité étant en contact avec l’au moins un élément de renfort creux ou avec l’au moins une piste de fixation lorsque la porte de coffre est fermée. According to a fourth aspect, the invention relates to a motor vehicle body comprising a trunk door according to the first aspect of the invention. Said box comprises a sealing element being in contact with at least one hollow reinforcing element or with at least one fixing track when the boot door is closed.
Selon un cinquième aspect, l’invention concerne un véhicule notamment véhicule automobile, comprenant un dispositif de structure de porte pour un coffre de véhicule le premier aspect de l’invention ou une caisse de véhicule automobile selon le quatrième aspect de l’invention. According to a fifth aspect, the invention relates to a vehicle, in particular a motor vehicle, comprising a door structure device for a vehicle trunk the first aspect of the invention or a motor vehicle body according to the fourth aspect of the invention.
Les dessins annexés représentent, à titre d’exemple, un mode de réalisation d’un dispositif, d’une porte de coffre, ou d’un véhicule selon l’invention. The accompanying drawings show, by way of example, an embodiment of a device, of a trunk door, or of a vehicle according to the invention.
La figure 1 représente le côté extérieur d’un mode de réalisation d’un dispositif de structure de porte de coffre d’un véhicule automobile. Figure 1 shows the outer side of an embodiment of a trunk door structure device of a motor vehicle.
La figure 2 représente le côté extérieur d’un mode de réalisation d’un dispositif de structure de porte de coffre selon la figure 1 sur lequel est monté un encadrement de lunette arrière.  Figure 2 shows the outer side of an embodiment of a trunk door structure device according to Figure 1 on which is mounted a rear window frame.
La figure 3 représente le côté intérieur d’un dispositif de structure de porte de coffre selon la figure 1.  FIG. 3 represents the interior side of a trunk door structure device according to FIG. 1.
La figure 4A représente une vue en coupe selon un plan A de la partie d’une porte de coffre selon un mode de réalisation de l’invention comprenant le dispositif selon la figure 3 ainsi qu’un joint d’étanchéité. La figure 4B est un schéma d’une vue en coupe selon un plan B de la porte de coffre dans un mode de réalisation où la coopération entre la partie supérieure et le cadre de lunette forme un deuxième corps creux. Figure 4A shows a sectional view along a plane A of the part of a trunk door according to an embodiment of the invention comprising the device according to Figure 3 and a seal. Figure 4B is a diagram of a sectional view along a plane B of the trunk door in an embodiment where the cooperation between the upper part and the scope frame forms a second hollow body.
La figure 5 représente un mode de réalisation d’un élément de renfort additionnel qui peut se monter sur un dispositif selon la figure 1 .  FIG. 5 represents an embodiment of an additional reinforcing element which can be mounted on a device according to FIG. 1.
La figure 6 est une vue en éclaté d’un mode de réalisation d’une porte de coffre d’un véhicule selon un mode de réalisation de l’invention.  FIG. 6 is an exploded view of an embodiment of a trunk door of a vehicle according to an embodiment of the invention.
La figure 7 représente un mode de réalisation d’un véhicule comprenant une porte de coffre.  FIG. 7 represents an embodiment of a vehicle comprising a trunk door.
Dans la suite de la description, les termes suivants sont définis et peuvent être compris de la manière suivante : In the following description, the following terms are defined and can be understood as follows:
Nous définissons par « partie inférieure », la partie se trouvant vers le bas relativement à un véhicule lorsque la porte de coffre 1 1 est en position fermée. A l’inverse, la « partie supérieure », désigne la partie se trouvant vers le haut relativement à un véhicule lorsque la porte de coffre 1 1 est en position fermée. Par exemple, les parties inférieure et supérieure se trouvent respectivement en dessous et au-dessus d’un bord inférieur de lunette arrière lorsque la porte de coffre est en position fermée. We define by "lower part", the part lying down relative to a vehicle when the trunk door 1 1 is in the closed position. Conversely, the "upper part" means the part located upward relative to a vehicle when the trunk door 1 1 is in the closed position. For example, the lower and upper parts are respectively below and above a lower edge of the rear window when the boot door is in the closed position.
Nous définissons par « côté intérieur » la face d’un élément destinée à être orientée vers l’intérieur de l’habitacle d’un véhicule lorsque la porte de coffre est en position fermée. A l’inverse, le « côté extérieure » désigne la face d’un élément destinée à être orientée vers extérieure de l’habitacle d’un véhicule lorsque la porte de coffre 1 1 est en position fermée. We define by "interior side" the face of an element intended to be oriented towards the interior of the passenger compartment of a vehicle when the boot door is in the closed position. Conversely, the "exterior side" designates the face of an element intended to be oriented towards the exterior of the passenger compartment of a vehicle when the boot door 1 1 is in the closed position.
Le concept de l’invention réside dans l’incorporation d’un élément de renfort creux s’étendant le long d’un dispositif de structure de porte de coffre de véhicule pour augmenter la rigidité du dispositif de structure. Le dispositif de structure permet alors d’augmenter l’inertie dans les sections sollicitées. Un exemple d’un dispositif 1 de structure de porte pour un coffre de véhicule automobile est décrit ci-après en référence à la figure 1. L’invention concerne notamment un dispositif 1 destiné à être recouvert pour former une porte de coffre 11 pour véhicule, notamment pour véhicule automobile. The concept of the invention lies in the incorporation of a hollow reinforcing element extending along a vehicle trunk door structure device to increase the rigidity of the structure device. The structural device then makes it possible to increase the inertia in the stressed sections. An example of a door structure device 1 for a motor vehicle boot is described below with reference to FIG. 1. The invention relates in particular to a device 1 intended to be covered to form a boot door 11 for a vehicle , especially for a motor vehicle.
Le dispositif 1 peut être un caisson de porte ou un élément de structure de porte de coffre. Le dispositif 1 peut être une doublure de coffre, préférentiellement d’une porte de coffre en hayon. The device 1 can be a door casing or a trunk door structure element. The device 1 can be a boot lining, preferably a tailgate boot door.
Le dispositif 1 comprend une première partie constituant un support comprenant une partie inférieure 1 b prolongée vers le haut par une partie supérieure 1 a. La partie inférieure 1 b est destiné à être recouverte par un élément de carrosserie. Comme illustré figure 2, la partie supérieure 1 a forme un encadrement de lunette arrière 4 destiné à être recouverte par un cadre de lunette arrière 6 de porte de coffre de véhicule. Le dispositif 1 comprend, en outre, au moins un élément de renfort creux 2. Le au moins un élément de renfort creux 2 s’étend depuis la partie inférieure 1 b jusqu’à la partie supérieure 1 a. Ainsi, l’élément de renfort creux 2 s’étend sur les parties inférieure et supérieure. L’élément de renfort creux 2 peut consister en un élément longitudinal disposé de manière continue ou discontinue sur la périphérie du dispositif 1 de manière à rigidifier le dispositif 1. The device 1 comprises a first part constituting a support comprising a lower part 1 b extended upwards by an upper part 1 a. The lower part 1b is intended to be covered by a bodywork element. As illustrated in Figure 2, the upper part 1 has a rear window frame 4 intended to be covered by a rear window frame 6 of the vehicle trunk door. The device 1 further comprises at least one hollow reinforcement element 2. The at least one hollow reinforcement element 2 extends from the lower part 1 b to the upper part 1 a. Thus, the hollow reinforcing element 2 extends over the lower and upper parts. The hollow reinforcing element 2 may consist of a longitudinal element disposed continuously or discontinuously on the periphery of the device 1 so as to stiffen the device 1.
Le au moins un élément de renfort creux 2 créer une ceinture sur au moins une portion de la périphérie du dispositif 1 , cette ceinture reliant la partie inférieure 1 b et la partie supérieure 1 a. Par au moins une portion, on entend ici au moins 25% ou au moins 50%. The at least one hollow reinforcing element 2 create a belt on at least a portion of the periphery of the device 1, this belt connecting the lower part 1 b and the upper part 1 a. By at least one portion is meant here at least 25% or at least 50%.
L’au moins un élément de renfort creux 2 peut s’étendre à une distance des bords latéraux, inférieur ou supérieur du dispositif 1 qui est comprise entre 1 cm et 20 cm, de préférence entre 5 cm et 15 cm. The at least one hollow reinforcing element 2 can extend at a distance from the lateral, lower or upper edges of the device 1 which is between 1 cm and 20 cm, preferably between 5 cm and 15 cm.
L’au moins un élément de renfort creux 2 peut s’étendre longitudinalement sur une longueur comprise entre 50 cm et 350 cm, préférentiellement entre 150 cm et 250 cm. The at least one hollow reinforcement element 2 can extend longitudinally over a length of between 50 cm and 350 cm, preferably between 150 cm and 250 cm.
L’élément de renfort creux 2 joue ici le rôle de poutre de rigidification. De plus, l’utilisation du plastique et la forme creuse de l’élément de renfort permettent d’améliorer l’amortissement des chocs, notamment des chocs entre la porte de coffre 1 1 comprenant le dispositif 1 et la caisse de véhicule lors de la fermeture de la porte de coffre 1 1 . The hollow reinforcing element 2 here acts as a stiffening beam. In addition, the use of plastic and the hollow shape of the reinforcing element make it possible to improve shock absorption, in particular impact between the boot door 1 1 comprising the device 1 and the vehicle body during the closing the boot door 1 1.
L’élément de renfort peut s’étendre de manière linéaire ou longitudinale. L’élément de renfort s’étend linéairement sur au moins une portion des contours du support ou sur au moins une portion des contours de l’ensemble formé par la partie inférieure 1 b et la partie supérieure 1 a. The reinforcing element can extend linearly or longitudinally. The reinforcing element extends linearly over at least a portion of the contours of the support or over at least a portion of the contours of the assembly formed by the lower part 1 b and the upper part 1 a.
Le au moins un élément de renfort creux 2 peut comprendre, comme illustré figure 1 , au moins deux éléments de renfort creux. Le au moins un élément de renfort creux 2 peut ainsi comprendre des discontinuités. Le au moins un élément de renfort creux 2 s’étend ainsi de manière continue ou semi-continue. The at least one hollow reinforcement element 2 can comprise, as illustrated in FIG. 1, at least two hollow reinforcement elements. The at least one hollow reinforcing element 2 can thus comprise discontinuities. The at least one hollow reinforcing element 2 thus extends continuously or semi-continuously.
L’élément de renfort creux 2 s’étend ainsi de manière à former au moins en partie un anneau de rigidification. The hollow reinforcing element 2 thus extends so as to form at least partially a stiffening ring.
L’élément de renfort creux 2 comprend au moins une première portion inférieure disposée le long du bord inférieur de la partie inférieure 1 b. L’élément de renfort creux 2 comprend au moins une deuxième portion supérieure disposée le long des bords latéraux du support depuis la partie inférieure 1 b jusqu’à la partie supérieure 1 a. The hollow reinforcing element 2 comprises at least a first lower portion disposed along the lower edge of the lower part 1b. The hollow reinforcing element 2 comprises at least a second upper portion disposed along the lateral edges of the support from the lower part 1 b to the upper part 1 a.
L’élément de renfort creux 2 peut s’étendre le long de la partie supérieure 1 a le long des bords formant l’encadrement de lunette arrière 4. The hollow reinforcing element 2 can extend along the upper part 1 a along the edges forming the rear window frame 4.
Dans un mode de réalisation illustré figure 1 , le dispositif 1 comprend deux éléments de renfort creux disposés symétriquement sur le support. In an embodiment illustrated in Figure 1, the device 1 comprises two hollow reinforcing elements arranged symmetrically on the support.
Dans un mode de réalisation alternatif, les deux éléments de renfort creux symétriques peuvent se rejoindre le long du bord inférieur de la partie inférieure 1 b et/ou peuvent se rejoindre le long de la partie sommitale 3 de l’encadrement de lunette arrière 4. Par « partie sommitale », on entend ici le bord supérieur de la partie supérieure 1a ou de l’encadrement de de lunette arrière. In an alternative embodiment, the two symmetrical hollow reinforcing elements can join along the lower edge of the lower part 1b and / or can join along the top part 3 of the rear window frame 4. By “top part” here is meant the upper edge of the upper part 1a or of the frame of the rear window.
Comme illustré sur la figure 4A, l’élément de renfort creux 2 présente une section de forme parallélépipédique et s’étend longitudinalement sur 4 faces. Préférentiellement, l’élément de renfort creux 2 présente une forme carrée. L’élément de renfort peut donc être présenté comme un creux entouré de 4 faces et s’étendant longitudinalement. La longueur des faces 2a, 2b peut varier entre 0,5 cm et 5 cm, de préférence entre 2 cm et 4 cm inclus. Plus généralement, la section droite de l’élément de renfort creux peut être comprise entre un cercle de A mm de diamètre et un cercle de B mm de diamètre. La géométrie de la section droite de l’élément de renfort peut être constante le long de l’élément de renfort. Alternativement, la géométrie de la section droite de l’élément de renfort peut évoluer le long de l’élément de renfort. As illustrated in FIG. 4A, the hollow reinforcing element 2 has a section of parallelepiped shape and extends longitudinally on 4 faces. Preferably, the hollow reinforcing element 2 has a square shape. The reinforcing element can therefore be presented as a hollow surrounded by 4 faces and extending longitudinally. The length of the faces 2a, 2b can vary between 0.5 cm and 5 cm, preferably between 2 cm and 4 cm inclusive. More generally, the cross section of the hollow reinforcing element can be between a circle of A mm in diameter and a circle of B mm in diameter. The geometry of the cross section of the reinforcing element can be constant along the reinforcing element. Alternatively, the geometry of the cross section of the reinforcing element can evolve along the reinforcing element.
Dans un mode de réalisation, une des faces 2a de la section de l’élément de renfort creux 2 peut être destiné à recevoir un élément d’étanchéité 7. Comme illustré figure 3, la face 2a de la section destinée à recevoir l’élément d’étanchéité 7 est la face 2a orientée vers l’intérieur du support. Les trois autres faces 2b s’étendent préférentiellement en sailli du côté extérieur du support. In one embodiment, one of the faces 2a of the section of the hollow reinforcing element 2 can be intended to receive a sealing element 7. As illustrated in FIG. 3, the face 2a of the section intended to receive the element sealing 7 is the face 2a oriented towards the inside of the support. The other three faces 2b preferably extend projecting from the outside of the support.
Avantageusement, la face 2a de l’au moins un élément de renfort creux 2 orientée vers le côté intérieur du support permet ainsi de définir une piste de fixation 71 pour au moins un élément d’étanchéité 7 d’un seul tenant. Cette disposition permet aussi de mieux stabiliser l’élément d’étanchéité 7 tel qu’un joint d’étanchéité afin de garantir l’étanchéité de la porte de coffre 1 1 , quelle que soit la température. Comme illustré figure 1 , la piste de connexion 71 permet de relier deux éléments de renfort creux 2 de manière à former une piste continue autour du support. Comme illustré figure 3, la piste de fixation autorise la pose d’un élément d’étanchéité 7 d’un seul tenant. Advantageously, the face 2a of the at least one hollow reinforcing element 2 oriented towards the interior side of the support thus makes it possible to define a fixing track 71 for at least one sealing element 7 in one piece. This arrangement also makes it possible to better stabilize the sealing element 7 such as a sealing gasket in order to guarantee the tightness of the trunk door 1 1, whatever the temperature. As illustrated in FIG. 1, the connection track 71 makes it possible to connect two hollow reinforcement elements 2 so as to form a continuous track around the support. As illustrated in Figure 3, the fixing track allows the installation of a sealing element 7 in one piece.
Dans un mode de réalisation, l’élément de renfort creux 2 est discontinu et la piste de fixation 71 est continue. La piste de fixation 71 peut s’étendre le long de l’élément de renfort creux 2 et entre les discontinuités dudit élément de renfort creux 2. In one embodiment, the hollow reinforcing element 2 is discontinuous and the fixing track 71 is continuous. The fixing track 71 can extend along the hollow reinforcing element 2 and between the discontinuities of said hollow reinforcing element 2.
La piste de fixation 71 peut comprendre des bandes entre les discontinuités de l’au moins un élément de renfort creux 2. Ces bandes permettent la continuité de la piste de fixation 71 pour permettre la pose d’un élément d’étanchéité 7 d’un seul tenant. L’élément d’étanchéité 7 d’un seul tenant autorise avantageusement de meilleures performances et une réduction du temps de fabrication. La piste de fixation 71 peut être ainsi partiellement réalisée par moulage lors de la fabrication du dispositif 1. Ainsi, aucune étape de fabrication supplémentaire n’est rajoutée. The fixing track 71 may comprise bands between the discontinuities of the at least one hollow reinforcing element 2. These bands allow the continuity of the fixing track 71 to allow the fitting of a sealing element 7 of a in one piece. The sealing element 7 in one piece advantageously allows better performance and a reduction in manufacturing time. The fixing track 71 can thus be partially produced by molding during the manufacture of the device 1. Thus, no additional manufacturing step is added.
La partie inférieure 1 b du support comprend un côté intérieur et un côté extérieur. Le côté extérieur est destiné à être recouvert par superposition d’un panneau extérieur de carrosserie 8. The lower part 1b of the support comprises an interior side and an exterior side. The outer side is intended to be covered by superposition of an exterior body panel 8.
La partie inférieure 1 b comprend, en outre, des éléments de rigidification (5a, 5b, 5c). Ces éléments de rigidifications sont obtenus par moulage de matière plastique pour réaliser le support. Ces éléments de rigidification autorisent la fixation d’organes fonctionnels. The lower part 1b further comprises stiffening elements (5a, 5b, 5c). These stiffening elements are obtained by molding plastic material to produce the support. These stiffening elements allow the attachment of functional members.
Au moins un premier élément de rigidification 5a autorise la fixation d’un dispositif de verrouillage. Au moins un second élément de rigidification 5b autorise la fixation d’un dispositif d’éclairage. At least one first stiffening element 5a authorizes the fixing of a locking device. At least one second stiffening element 5b authorizes the fixing of a lighting device.
Un troisième élément de rigidification 5c autorise la fixation d’un dispositif d’essuie-glace. A third stiffening element 5c allows the attachment of a wiper device.
La partie supérieure 1 a du support forme un encadrement de lunette arrière 4. Cette partie supérieure 1 a est destinée à être recouverte par superposition d’un cadre de lunette arrière 6. Le cadre de lunette et le panneau extérieur de carrosserie 8 sont destinés à être disposés de manière adjacente sur la même face du dispositif 1 , préférentiellement à effleurement l’un de l’autre. Préférentiellement, l’élément de renfort creux 2 est réalisé par injection assistée par fluide. Le fluide utilisé pour créer l’élément de renfort creux 2 peut être un gaz ou un liquide tel que l’eau. The upper part 1 a of the support forms a rear window frame 4. This upper part 1 a is intended to be covered by superposition of a rear window frame 6. The window frame and the exterior body panel 8 are intended to be arranged adjacent to the same side of the device 1, preferably touching each other. Preferably, the hollow reinforcing element 2 is produced by fluid-assisted injection. The fluid used to create the hollow reinforcing element 2 can be a gas or a liquid such as water.
Avantageusement, le dispositif 1 comprenant le support et l’élément de renfort creux 2 est réalisé en une pièce unique. De préférence, le dispositif 1 est réalisé par injection de matière plastique et le creux de l’élément de renfort creux 2 est réalisé par injection assistée par fluide. Advantageously, the device 1 comprising the support and the hollow reinforcing element 2 is produced in a single piece. Preferably, the device 1 is produced by injection of plastic material and the hollow of the hollow reinforcing element 2 is produced by injection assisted by fluid.
L’invention s’affranchit ainsi d’étapes de fixation d’éléments métalliques sur le support pour rigidifier une doublure de porte de coffre 11. The invention thus overcomes the steps of fixing metallic elements to the support to stiffen a trunk door lining 11.
Le procédé pour la fabrication d’un tel dispositif 1 de structure de porte de coffre de véhicule peut comprendre une étape d’injection plastique pour produire le support ou pour produire en une seule pièce la partie inférieure 1 b et la partie supérieure 1 a. The method for the manufacture of such a device 1 for the vehicle trunk door structure may include a plastic injection step for producing the support or for producing in a single piece the lower part 1 b and the upper part 1 a.
Le procédé comprend également une étape d’injection plastique assistée par fluide pour la production du au moins un élément de renfort creux 2. Cette étape peut faire partie de l’étape d’injection précédente. The method also includes a fluid-assisted plastic injection step for producing the at least one hollow reinforcing element 2. This step can be part of the previous injection step.
Ces deux étapes sont avantageusement réalisées en parallèle de manière à obtenir un dispositif 1 d’une seule pièce où le au moins un élément de renfort creux 2 est solidaire de la partie inférieure 1 b et de la partie supérieure 1 a. These two steps are advantageously carried out in parallel so as to obtain a device 1 in one piece where the at least one hollow reinforcing element 2 is integral with the lower part 1 b and the upper part 1 a.
L’invention concerne également une porte de coffre 11 pour véhicule, notamment pour véhicule automobile. The invention also relates to a trunk door 11 for a vehicle, in particular for a motor vehicle.
Un exemple d’une porte de coffre 11 d’un véhicule automobile est décrit ci-après en référence à la figure 6. La porte de coffre 11 comprend un dispositif 1 de structure de porte tel que décrit ci-dessus. La porte de coffre 11 comprend également un cadre de lunette arrière 6 ainsi qu’un panneau extérieur de carrosserie 8. An example of a trunk door 11 of a motor vehicle is described below with reference to FIG. 6. The trunk door 11 comprises a device 1 for the door structure as described above. The trunk door 11 also includes a rear window frame 6 and an exterior body panel 8.
Comme détaillé ci-dessus, le cadre de lunette 6 recouvre par superposition l’encadrement de lunette arrière 4 du dispositif 1. Le cadre de lunette 6 recouvre le dispositif 1 sur le côté extérieur du dispositif 1. Dans un mode de réalisation illustré figure 4B, une fois le cadre de lunette 6 assemblé au dispositif 1 , le cadre 6 et le dispositif 1 forment un deuxième corps creux 61. As detailed above, the bezel frame 6 overlaps the rear window frame 4 of the device 1. The bezel frame 6 covers the device 1 on the outside of the device 1. In an embodiment illustrated in FIG. 4B , once the spectacle frame 6 assembled to the device 1, the frame 6 and the device 1 form a second hollow body 61.
Le cadre de lunette 6 est conçu pour coopérer avec le côté extérieur de la partie supérieure de manière à créer un deuxième corps creux 61 entre le cadre de lunette 6 et la partie supérieure 1 a. The bezel frame 6 is designed to cooperate with the outer side of the upper part so as to create a second hollow body 61 between the bezel frame 6 and the upper part 1a.
Le deuxième corps creux 61 s’étend avantageusement le long du corps creux 21 formé par l’élément de renfort creux 2. La porte de coffre 11 comprend ainsi un double corps creux augmentant la rigidité de la porte de coffre 11. Le dispositif de structure permet alors d’augmenter l’inertie dans les sections sollicitées par rapport à un dispositif similaire en acier sans en changer ces dimensions extérieures. Dans un mode de réalisation, la partie sommitale 3 de l’encadrement de lunette arrière 4 est destinée à recevoir au moins une charnière d’articulation. La charnière d’articulation permet de lier la porte de coffre 11 en rotation avec le cadre de véhicule. L’autre côté de la partie sommitale 3 peut être destinée à recevoir un élément améliorant l’aérodynamisme du véhicule tel qu’un becquet 10 ou un aileron. La porte de coffre 1 1 peut comprendre un élément permettant l’amélioration de l’aérodynamisme du véhicule tel qu’un becquet 10 ou un aileron. The second hollow body 61 advantageously extends along the hollow body 21 formed by the hollow reinforcing element 2. The trunk door 11 thus comprises a double hollow body increasing the rigidity of the trunk door 11. The structural device then allows to increase the inertia in the stressed sections compared to a similar steel device without changing these external dimensions. In one embodiment, the top part 3 of the rear window frame 4 is intended to receive at least one articulation hinge. The articulation hinge makes it possible to link the boot door 11 in rotation with the vehicle frame. The other side of the top part 3 can be intended to receive an element improving the aerodynamics of the vehicle such as a spoiler 10 or a spoiler. The trunk door 1 1 may include an element for improving the aerodynamics of the vehicle such as a spoiler 10 or a spoiler.
La porte de coffre 1 1 comprend un panneau extérieur de carrosserie 8. Préférentiellement, le panneau extérieur de carrosserie 8 est disposé de manière à recouvrir la partie inférieure 1 b du dispositif de structure. Le panneau extérieur de carrosserie 8 peut être disposé de manière adjacente au cadre de lunette arrière 6. The trunk door 1 1 comprises an exterior body panel 8. Preferably, the exterior body panel 8 is arranged so as to cover the lower part 1 b of the structural device. The exterior body panel 8 can be arranged adjacent to the rear window frame 6.
Le panneau extérieur de carrosserie 8 peut être disposé sensiblement à affleurement du cadre de lunette arrière 6.  The exterior body panel 8 can be disposed substantially flush with the rear window frame 6.
La porte de coffre 1 1 peut comprendre un élément d’étanchéité 7 ou un joint d’étanchéité fixé à l’élément de renfort creux 2 ou à la piste de fixation 71 du dispositif. Avantageusement, l’élément d’étanchéité 7 consiste en un seul tenant afin de simplifier les étapes de fabrication de ladite porte de coffre 1 1 . L’élément d’étanchéité 7 est fixé sur le côté intérieur dudit dispositif, de préférence sur la piste de fixation 71 . The trunk door 1 1 may comprise a sealing element 7 or a sealing gasket fixed to the hollow reinforcing element 2 or to the fixing track 71 of the device. Advantageously, the sealing element 7 consists of a single piece in order to simplify the steps of manufacturing said trunk door 1 1. The sealing element 7 is fixed on the inside of said device, preferably on the fixing track 71.
Dans un mode de réalisation, la porte de coffre 1 1 comprend au moins un moyen de renfort additionnel 9 en matière plastique. In one embodiment, the trunk door 1 1 comprises at least one additional reinforcement means 9 made of plastic.
Un exemple d’un tel moyen de renfort additionnel plastique 9 est illustré figure 5. An example of such an additional plastic reinforcement means 9 is illustrated in FIG. 5.
Ce moyen de renfort additionnel plastique 9 comprend un tube longitudinal creux 9a. Le tube longitudinal creux 9a est une pièce injectée assistée par fluide afin de générer directement lors de l’injection, un corps creux, tout en permettant d’obtenir une pièce d’une raideur suffisante. Le moyen de renfort additionnel plastique 9 peut également comprendre des éléments de fixation 9b, 9c aux extrémités longitudinales du tube creux 9a. Ces éléments de fixation 9b, 9c comprennent préférentiellement des orifices débouchant pour coopérer avec des écrous ou des vis. Dans ce mode de réalisation, le moyen de renfort additionnel 9 est vissé sur le dispositif 1 selon l’invention. This additional plastic reinforcement means 9 comprises a hollow longitudinal tube 9a. The hollow longitudinal tube 9a is a fluid-assisted injected part in order to generate directly during injection, a hollow body, while making it possible to obtain a part of sufficient stiffness. The additional plastic reinforcement means 9 may also include fixing elements 9b, 9c at the longitudinal ends of the hollow tube 9a. These fastening elements 9b, 9c preferably comprise orifices opening out to cooperate with nuts or screws. In this embodiment, the additional reinforcement means 9 is screwed onto the device 1 according to the invention.
Ces éléments de fixation 9b, 9c sont surmoulés sur le tube longitudinal creux 9a par injection de matière plastique. Le moyen de renfort additionnel plastique 9 peut ainsi consister en plusieurs pièces plastiques d’une raideur suffisamment importante et sans utilisation de pièces métalliques. These fastening elements 9b, 9c are molded onto the hollow longitudinal tube 9a by injection of plastic material. The additional plastic reinforcement means 9 can thus consist of several plastic parts of sufficiently high stiffness and without the use of metal parts.
Le moyen de renfort additionnel plastique 9 peut être disposé sur le côté intérieur du dispositif de structure de porte. Le moyen de renfort additionnel plastique 9 permet de renforcer la rigidité et la tenue à la déformation irréversible de la porte de coffre 1 1 . The additional plastic reinforcement means 9 can be arranged on the inside of the door structure device. The additional plastic reinforcement means 9 makes it possible to reinforce the rigidity and the resistance to irreversible deformation of the boot door 11.
Avantageusement, le au moins un moyen de renfort additionnel plastique 9 s’étend depuis la partie inférieure 1 b du dispositif 1 jusqu’à la partie supérieure 1 a du dispositif 1 . Le au moins un moyen de renfort additionnel plastique 9 est fixé à la partie supérieure 1 a et/ou à la partie inférieure 1 b du dispositif par les éléments de fixation 9b, 9c présents aux extrémités longitudinales du tube creux 9a. Advantageously, the at least one additional plastic reinforcement means 9 extends from the lower part 1 b of the device 1 to the upper part 1 a of the device 1. The at least one additional plastic reinforcement means 9 is fixed to the upper part 1a and / or to the lower part 1b of the device by the fixing elements 9b, 9c present at the longitudinal ends of the hollow tube 9a.
Dans un mode de réalisation alternatif, le moyen de renfort additionnel plastique 9 est préférentiellement surmoulé sur la partie supérieure 1 a et/ou sur la partie inférieure 1 b du dispositif. In an alternative embodiment, the additional plastic reinforcement means 9 is preferably overmolded on the upper part 1 a and / or on the lower part 1 b of the device.
Les éléments de fixation 9b, 9c comprennent alors préférentiellement des orifices débouchant ou autres conformations permettant leur surmoulage sur le reste du dispositif 1 . L’avantage d’un tel moyen de renfort additionnel plastique 9 est de réaliser une pièce en une seule opération. Un tel moyen de renfort additionnel plastique réalisé par moulage présente également moins de défauts géométriques qu’une pièce similaire réalisée en acier. Enfin, l’utilisation de plastique permet de s’abstenir de tout traitement anticorrosion de la pièce par rapport à une pièce similaire en acier. The fastening elements 9b, 9c then preferably comprise through orifices or other conformations allowing their overmolding on the rest of the device 1. The advantage of such an additional plastic reinforcement means 9 is to produce a part in a single operation. Such additional plastic reinforcement means produced by molding also has fewer geometric defects than a similar piece made of steel. Finally, the use of plastic makes it possible to refrain from any anti-corrosion treatment of the part compared to a similar steel part.
De même, le moyen de renfort additionnel 9 et l’élément de renfort creux 2 autorisent à la porte de coffre 1 1 une meilleure stabilité géométrique et une meilleure tenue a la température du au positionnement du moyen de renfort plastique additionnel 9 et de l’élément de renfort creux 2 sur le dispositif 1 . Similarly, the additional reinforcement means 9 and the hollow reinforcement element 2 allow the trunk door 1 1 better geometric stability and better temperature resistance due to the positioning of the additional plastic reinforcement means 9 and the hollow reinforcement element 2 on the device 1.
La porte de coffre 1 1 peut également comprendre au moins un dispositif d’éclairage au moins un dispositif d’essuie-glace ou au moins un dispositif de verrouillage insérés ou fixés dans les éléments de rigidifications de la partie inférieure 1 b. The trunk door 1 1 may also include at least one lighting device at least one wiper device or at least one locking device inserted or fixed in the stiffening elements of the lower part 1 b.
La présente invention consiste également en une caisse de véhicule automobile comprenant un dispositif de structure de porte de coffre tel que décrit ci-dessus. The present invention also consists of a motor vehicle body comprising a trunk door structure device as described above.
La caisse de véhicule peut comprendre un joint d’étanchéité agencé de manière à venir en butée avec le au moins un élément de renfort creux 2 ou avec la piste de fixation 71 lorsque la porte de coffre 1 1 est en position fermée. The vehicle body may include a seal arranged so as to abut with the at least one hollow reinforcing element 2 or with the fixing track 71 when the trunk door 1 1 is in the closed position.
L’invention consiste également en un véhicule 12 comprenant un dispositif 1 de structure de porte de coffre tel que décrit ci-dessus, comprenant une porte de coffre 1 1 telle que décrit ci-dessus ou une caisse de véhicule telle que décrit ci-dessus. Comme illustré figure 7, le véhicule 12 comprend un porte de coffre 1 1 comprenant un dispositif 1 selon l’invention, un cadre de lunette arrière 6 et un panneau extérieur de carrosserie 8. The invention also consists of a vehicle 12 comprising a device 1 for the trunk door structure as described above, comprising a trunk door 1 1 as described above or a vehicle body as described above . As illustrated in FIG. 7, the vehicle 12 comprises a trunk door 1 1 comprising a device 1 according to the invention, a rear window frame 6 and an exterior body panel 8.

Claims

Revendications : Claims:
1. Dispositif (1 ) de structure de porte pour un coffre de véhicule automobile comprenant : 1. Device (1) for door structure for a motor vehicle trunk comprising:
■ une partie inférieure (1 b) destinée à être recouverte d’un panneau extérieur de carrosserie (8) et une partie supérieure (1 a) formant un encadrement de lunette arrière (4) destinée à être recouverte par un cadre de lunette arrière (6) ; et ■ a lower part (1 b) to be covered with an outer panel body (8) and an upper portion (1 a) forming a rear window frame (4) intended to be covered by a rear window frame ( 6); and
■ au moins un élément de renfort creux (2) s’étendant depuis la partie inférieure (1 b) jusqu’à la partie supérieure (1 a) ; ■ at least one hollow reinforcing element (2) extending from the lower part (1 b) to the upper part (1 a);
■ l’élément de renfort creux (2) étant réalisé par injection assistée par fluide. ■ the hollow reinforcing element (2) being produced by injection assisted by fluid.
2. Dispositif (1 ) selon la revendication 1 , dans lequel ledit dispositif (1 ) est réalisé en une seule pièce par injection de matière plastique. 2. Device (1) according to claim 1, wherein said device (1) is made in one piece by injection of plastic.
3. Dispositif (1 ) selon la revendication 1 ou la revendication 2, dans lequel le au moins un élément de renfort creux (2) fait sailli par rapport à la partie inférieure (1 b) et/ou à la partie supérieure (1 a). 3. Device (1) according to claim 1 or claim 2, wherein the at least one hollow reinforcing element (2) projects relative to the lower part (1 b) and / or the upper part (1 a ).
4. Dispositif (1 ) selon la revendication 3, dans lequel le au moins un élément de renfort creux (2) fait sailli du côté extérieur de la partie inférieure (1 b) et/ou de la partie supérieure (1a). 4. Device (1) according to claim 3, wherein the at least one hollow reinforcing element (2) protrudes from the outside of the lower part (1b) and / or the upper part (1a).
5. Dispositif (1 ) selon l’une des revendications 1 à 4 dans lequel l’élément de renfort creux (2) présente une section parallélépipédique, préférentiellement une section carrée. 5. Device (1) according to one of claims 1 to 4 wherein the hollow reinforcing element (2) has a parallelepiped section, preferably a square section.
6. Dispositif (1 ) selon l’une des revendications 1 à 5 dans lequel le au moins un élément de renfort creux (2) forme un cadre périphérique encadrant au moins partiellement l’encadrement de lunette arrière (4) et/ou dans lequel le au moins un élément de renfort creux (2) forme un cadre périphérique encadrant au moins partiellement le dispositif (1 )· 6. Device (1) according to one of claims 1 to 5 wherein the at least one hollow reinforcing element (2) forms a peripheral frame at least partially framing the rear window frame (4) and / or in which the at least one hollow reinforcing element (2) forms a peripheral frame at least partially framing the device (1) ·
7. Dispositif (1 ) selon l’une des revendications 1 à 6, comprenant également une piste de fixation (71 ) continue comprenant une face (2a) du au moins un élément de renfort creux (2) ; ladite piste de fixation (71 ) étant agencée sur le côté intérieur du dispositif (1 ). 7. Device (1) according to one of claims 1 to 6, also comprising a continuous fixing track (71) comprising a face (2a) of the at least one hollow reinforcing element (2); said fixing track (71) being arranged on the interior side of the device (1).
8. Procédé de réalisation d’un dispositif (1 ) selon l’une des revendications 1 à 7, comprenant les étapes suivantes : 8. Method for producing a device (1) according to one of claims 1 to 7, comprising the following steps:
■ une étape d’injection plastique pour la production de la partie inférieure (1 b) et de la partie supérieure (1a) ; ■ a plastic injection stage for the production of the lower part (1b) and the upper part (1a);
■ une étape d’injection plastique assistée par fluide pour la production du au moins un élément de renfort creux (2) s’étendant depuis la partie inférieure (1 b) jusqu’à la partie supérieure (1a). ■ a fluid-assisted plastic injection step for producing the at least one hollow reinforcing element (2) extending from the lower part (1b) to the upper part (1a).
9. Procédé selon la revendication 8, dans lequel un moyen de renfort additionnel en matériau plastique (9a) est rapporté, notamment rapporté par surmoulage, sur le reste du dispositif (1 ). 9. The method of claim 8, wherein an additional reinforcing means of plastic material (9a) is attached, in particular added by molding, on the rest of the device (1).
10. Porte de coffre (11 ) d'un véhicule automobile comprenant un dispositif (1 ) de structure de porte de coffre de véhicule selon l'une des revendications 1 à 7 et un cadre de lunette arrière (6) ; ledit cadre de lunette arrière (6) recouvrant par superposition l’encadrement de lunette arrière (4) dudit dispositif (1 ), et dans lequel la superposition du cadre de lunette arrière (6) et du dispositif (1 ) forme un deuxième corps creux (61 ) s’étendant sur au moins une portion de la longueur du au moins un élément de renfort creux (2). 10. Trunk door (11) of a motor vehicle comprising a device (1) of the vehicle trunk door structure according to one of claims 1 to 7 and a rear window frame (6); said rear window frame (6) overlapping the rear window frame (4) of said device (1), and in which the superposition of the rear window frame (6) and the device (1) forms a second hollow body (61) extending over at least a portion of the length of the at least one hollow reinforcing element (2).
11. Porte de coffre (11 ) d’un véhicule automobile comprenant un dispositif (1 ) de structure de porte de coffre selon l'une des revendications 1 à 7 et au moins un élément d’étanchéité (7) fixé sur le au moins un élément de renfort creux (2). 11. Trunk door (11) of a motor vehicle comprising a device (1) for trunk door structure according to one of Claims 1 to 7 and at least one sealing element (7) fixed to the at least one hollow reinforcing element (2).
12. Porte de coffre (11 ) d’un véhicule automobile comprenant un dispositif (1 ) de structure de porte de coffre selon l'une des revendications 1 à 7 et au moins un moyen de renfort additionnel plastique (9) reliant la partie supérieure (1 a) à la partie inférieure (1 b) et comprenant un tube creux (9a) et des éléments de fixation (9a, 9b) surmoulées aux extrémités longitudinales du tube creux (9a). 12. Trunk door (11) of a motor vehicle comprising a device (1) of trunk door structure according to one of claims 1 to 7 and at least one additional plastic reinforcement means (9) connecting the upper part (1 a) at the lower part (1 b) and comprising a hollow tube (9a) and fixing elements (9a, 9b) overmolded at the longitudinal ends of the hollow tube (9a).
13. Caisse de véhicule automobile comprenant une porte de coffre (11 ) selon l’une des revendications 10 à 12, dans laquelle la caisse comprend un élément d’étanchéité (7), ledit élément d’étanchéité (7) étant en contact avec l’au moins un élément de renfort creux (2) ou avec l’au moins une piste de fixation (71 ) lorsque la porte de coffre13. Motor vehicle body comprising a trunk door (11) according to one of claims 10 to 12, wherein the body comprises a sealing element (7), said sealing element (7) being in contact with the at least one hollow reinforcement element (2) or with the at least one fixing track (71) when the trunk door
(11 ) est fermée. (11) is closed.
14. Véhicule (12), notamment véhicule automobile, comprenant un dispositif (1 ) de structure de porte pour un coffre de véhicule selon l’une des revendications 1 à 7 ou une caisse de véhicule automobile selon la revendication 13. 14. Vehicle (12), in particular motor vehicle, comprising a device (1) of door structure for a vehicle trunk according to one of claims 1 to 7 or a motor vehicle body according to claim 13.
PCT/EP2019/067337 2018-07-05 2019-06-28 Vehicle boot lid structure device WO2020007727A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020217003774A KR20210028690A (en) 2018-07-05 2019-06-28 Car trunk cover rescue device
CN201980040823.8A CN112351900A (en) 2018-07-05 2019-06-28 Vehicle luggage compartment cover structure device
BR112020025703-6A BR112020025703A2 (en) 2018-07-05 2019-06-28 COVER STRUCTURE DEVICE FOR AN AUTOMOTIVE VEHICLE SUITCASE, PROCESS OF CARRYING OUT THE SAME, AUTOMOTIVE VEHICLE SUITCASE COVER, AUTOMOTIVE VEHICLE BODY, AND, VEHICLE, NOTELY AUTOMOTIVE VEHICLE
JP2021500036A JP7458364B2 (en) 2018-07-05 2019-06-28 Vehicle trunk door structure device
EP19733799.1A EP3817936A1 (en) 2018-07-05 2019-06-28 Vehicle boot lid structure device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1856195A FR3083484B1 (en) 2018-07-05 2018-07-05 VEHICLE BOX DOOR STRUCTURE DEVICE
FR1856195 2018-07-05

Publications (1)

Publication Number Publication Date
WO2020007727A1 true WO2020007727A1 (en) 2020-01-09

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PCT/EP2019/067337 WO2020007727A1 (en) 2018-07-05 2019-06-28 Vehicle boot lid structure device

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EP (1) EP3817936A1 (en)
JP (1) JP7458364B2 (en)
KR (1) KR20210028690A (en)
CN (1) CN112351900A (en)
BR (1) BR112020025703A2 (en)
FR (1) FR3083484B1 (en)
WO (1) WO2020007727A1 (en)

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EP3817936A1 (en) 2021-05-12
CN112351900A (en) 2021-02-09
JP7458364B2 (en) 2024-03-29
BR112020025703A2 (en) 2021-03-16
KR20210028690A (en) 2021-03-12
JP2021528318A (en) 2021-10-21
FR3083484A1 (en) 2020-01-10
FR3083484B1 (en) 2021-04-09

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