FR3140579A1 - Motor vehicle trunk flap hinge reinforcement - Google Patents

Abstract

The invention proposes an opening (14), such as a trunk flap, of a motor vehicle. The sash includes an exterior panel (30); a reinforcing liner (32); a recess (40) between the outer panel and the reinforcing liner, said recess comprising a bottom surface (56); a fixing reinforcement (54) with a first fixing zone (58) to the liner, said reinforcement being in the recess; a pivot joint (24) attached to the liner at the first attachment area of the attachment brace. The fixing reinforcement comprises a second fixing zone (62) to the reinforcement liner which is opposite the first fixing zone with respect to the recess, and a junction (60) connecting the first fixing zone to the second fixing zone which passes through the recess at a distance from the bottom surface. Figure to be published with the abstract: Fig. 5

Description

Motor vehicle trunk flap hinge reinforcement

The invention relates to motor vehicle openings. More precisely, the invention relates to a motor vehicle opening with a hinge fixing zone reinforcement. The invention also proposes a motor vehicle with an opening.

Several openings provide access to the compartments of a motor vehicle. An opening generally has an exterior panel forming an exterior skin, and a reinforcing lining for the exterior panel. Thanks to dedicated joints, each opening is movably mounted between an open position and a closed position in a dedicated opening in the vehicle structure. Due to the length of the openings, the pivoting joints are associated with fixing reinforcements directly linked to the reinforcement linings. This limits the effect of the overhang from the pivoting joints.

In the case of a rear trunk flap, the opening has a significant elongation on certain vehicles. Therefore, the fixing reinforcements are particularly stressed in order to limit deformation of the reinforcement lining during opening and closing movements. A first approach to reducing mechanical stress consists of lightening the opening and making the reinforcing lining out of plastic. This solution also provides freedom of geometric design. However, this choice is accompanied by mechanical constraints since the plastic material has limited resistance.

Document CN-A-108583244 describes a motor vehicle with a rear trunk flap whose opening movement is accompanied by hinges and gas struts. The trunk lid has an interior frame made of plastic material with an upper area where the hinges are attached. The trunk lid is reinforced with hinge reinforcement plates and metal reinforcement plates at the gas spring attachments. In addition, metal reinforcements connect the hinge reinforcement plates to the metal fixing plates on each side. These reinforcing elements fit the interior surface of the metal frame and are co-molded like inserts. This configuration increases the overall rigidity of the trunk lid. However, the whole thing is heavy and complex. The costs of the various reinforcements and their fixing operations remain high. Production by co-molding adds geometric constraints. Finally, the rigidity can still be improved.

The invention aims to respond to at least one of the problems or disadvantages encountered in the prior art. In particular, the invention aims to improve the rigidity of a motor vehicle opening. The invention also aims to optimize the rigidity, mass and costs of a motor vehicle opening.

According to a first aspect, the invention proposes a motor vehicle opening comprising an exterior panel; a reinforcing lining; a recess between the outer panel and the reinforcing liner, said recess comprising a bottom surface; a fixing reinforcement with a first fixing zone to the reinforcing liner, said fixing reinforcement being in the recess; a pivot joint attached to the reinforcement liner at the first attachment area of the attachment reinforcement; remarkable in that the fixing reinforcement comprises a second fixing zone to the reinforcing lining which is opposite the first fixing zone with respect to the recess, and a junction which connects the first fixing zone to the second fixing zone and which passes through the recess at a distance from the bottom surface.

It will be understood that the invention proposes a motor vehicle opening; the opening comprising: an exterior panel; a reinforcing liner with a shell; and a pivoting joint; the opening having a recess between the exterior panel and the shell of the reinforcing lining, the shell forming a fixing interface between the recess and the pivoting joint; remarkable in that the opening further comprises a reinforcing elbow arranged in the recess and connected to the shell at the level of the pivoting joint, the reinforcing elbow comprising a branch passing through the recess and which is in elevation relative to in the shell; the reinforcing elbow is optionally a fixing reinforcement.

The arrangement of the junction makes it possible to form a strut in the recess, and which connects the pivoting joint to the second fixing point placed at a distance. Thus, the deformations around the recess remain reduced. During opening and closing movements, the pivoting joints generate little deformation to the reinforcing lining.

Preferably, the junction comprises a ribbon and at least one stiffening rib extending between the first fixing zone and the second fixing zone.

Preferably, the opening comprises a glass wall, a bonding zone on the reinforcing lining, and an adhesive for fixing the glass wall to the bonding zone; the second fixing zone is adjacent to the bonding zone; preferably the recess comprises a separation space between the junction and the bottom surface.

Preferably, the opening comprises a spoiler, and the opening comprises a fixing axis fixed to the spoiler and passing through: the reinforcing lining, the second fixing zone and the exterior panel.

Preferably the spoiler extends substantially over the entire width of the opening and has a length greater than or equal to 100 mm.

Preferably, the exterior panel comprises a first surface delimiting the recess and a second surface opposite the first surface and arranged outwards, the junction being at a distance from said first surface.

Preferably, the fixing reinforcement comprises an elbow connecting the first fixing zone to the junction, and the first fixing zone is arranged in the recess.

Preferably, the opening comprises two longitudinal uprights, the fixing reinforcement being transversely between the two longitudinal uprights.

Preferably, the reinforcing lining comprises at least one reinforcing partition projecting towards the fixing reinforcement and extending along the fixing reinforcement.

Preferably the reinforcing lining comprises a fixing boss fixed to the second fixing zone and at least one reinforcing partition extending from said fixing boss.

Preferably, the exterior panel comprises a first material with a first Young's modulus, and the reinforcing lining comprises a second material with a second Young's modulus greater than the first Young's modulus.

Preferably the first material comprises a plastic material, and the second material comprises a metallic material.

Preferably, the second fixing zone is longitudinally at the level of the bonding zone.

Preferably, the pivoting joint is fixed to the fixing reinforcement through the reinforcing lining.

Preferably, the first fixing zone is at a distance from the bottom surface.

Preferably, the external surface comprises a bottom zone forming the bottom surface of the recess.

Preferably, the at least one stiffening rib projects towards the bottom surface.

Preferably, the reinforcing lining comprises a first wall for fixing the first fixing zone and delimiting the recess.

Preferably, the fixing boss delimits the recess.

Preferably, the fixing reinforcement comprises a first thickness, and the reinforcing lining comprises a second thickness greater than the first thickness.

Preferably, in the recess, the junction of the fixing reinforcement is closer to the exterior panel than to the reinforcing lining.

Preferably, the spoiler overlaps the fixing reinforcement, in particular longitudinally.

Preferably, the junction is generally planar.

Preferably, the fixing reinforcement is in one piece.

Preferably, the first fixing zone is a first fixing end.

Preferably, the second fixing zone is a second fixing end.

Preferably, the reinforcing lining comprises an internal surface opposite the external surface.

Preferably, the pivoting joint fixed to the internal surface of the reinforcing lining.

Preferably, the recess comprising a first termination on the side of the pivoting joint and an end termination opposite the first termination and on the side of the second fixing zone.

According to another aspect, the invention proposes a motor vehicle opening comprising: an exterior panel; a reinforcing liner with an outer surface facing the outer panel, and an inner surface opposite the outer surface; a pivot joint attached to the inner surface of the reinforcement liner; a recess adjoining the pivot joint, said recess being between the outer panel and the outer surface of the reinforcing liner, and comprising a first end on the pivot joint side and a second end opposite the first end , a fixing reinforcement with a first fixing zone against the external surface, the pivoting joint being fixed to the fixing reinforcement through the reinforcing liner; remarkable in that the fixing reinforcement comprises a second fixing zone against the reinforcing lining, and a junction connecting the first fixing zone to the second fixing zone which passes through the recess at a distance from the external surface of the lining reinforcement, preferably the recess comprises a separation space between the junction and the external surface.

According to another aspect, the invention proposes a motor vehicle comprising an opening, remarkable in that the opening conforms to the invention, preferably, the opening is a rear trunk flap.

The invention will be well understood and other aspects and advantages will appear clearly on reading the description which follows given with reference to the figures appended and listed below.

There is a side view of a motor vehicle according to the invention.

There represents an opening of a motor vehicle according to the invention.

There shows the interior of a recess shaped in a reinforcing lining of a motor vehicle opening according to the invention.

There illustrates a fixing reinforcement in a recess in the reinforcement lining of a motor vehicle opening according to the invention.

There is a section of a motor vehicle opening according to the invention.

In the following description, the term “include” is synonymous with “include” and is not restrictive in that it authorizes the presence of other elements in the motor vehicle or the opening to which it relates. It is understood that the term “understand” includes the terms “consist of”. The terms “external” and “internal” will respectively designate what is oriented towards the exterior of the vehicle and towards the interior of the vehicle.

In this description, the term “longitudinal”, the term “longitudinal”, the term “transverse”, and the term “transversely” are used according to the reference of the vehicle, in the assembly configuration. The term “longitudinal” corresponds to the main direction of movement of the vehicle. The term “transverse” corresponds to a direction perpendicular to the main direction of movement of the vehicle. The term “front” refers to the main direction of movement of the vehicle. The term “rear” designates the opposite of the term “front”.

The X axis represents the longitudinal direction, the Y axis represents the transverse direction, and the Z axis represents the vertical direction. These three axes define a trihedron whose orientation is preserved throughout the figures.

In this description, the value ranges include the limits which delimit them.

Through the description, the different figures use the same reference signs to designate identical or similar entities.

There represents a motor vehicle 10 according to the invention. The motor vehicle 10 comprises energy storage means and at least one motor (not shown) adapted to drive said motor vehicle 10.

The motor vehicle 10 comprises a structure 12. The structure 12 forms an exterior body, or even a main frame of the motor vehicle. The structure 12 delimits different compartments of the motor vehicle 10, including the passenger compartment, the cargo compartment, the engine compartment (not shown).

The structure 12 supports various components of the motor vehicle including the running gear and the engine. The structure 12 supports several openings 14. The openings 14 include: side doors 16, a front hood flap 18, a rear trunk flap 20. The rear trunk flap 20 optionally has a rear window 22. The rear window 22 forms a glass wall of the motor vehicle 10. The rear window 22, in particular the glass wall, has a convex shape which contributes to the rigidity of the rear trunk flap 20.

The rear trunk flap 20 is rotatably connected to the structure 12 thanks to at least one pivoting joint 24, preferably two pivoting joints 24 (only one visible). Each pivoting joint 24 of the rear trunk flap 20 has a horizontal pivot axis, preferably arranged in the transverse direction. The pivoting joint 24 may be a hinge.

According to one option, the motor vehicle 10 comprises cylinders 26 forming means of assisting the opening and closing of the rear trunk flap 20. The pivoting joints 24 can be motorized.

There exposes an opening 14 of a motor vehicle. The motor vehicle may correspond to that presented in relation to the . The opening 14 here corresponds to the rear trunk flap 20, however the present teaching can apply to any opening 14 of the motor vehicle. The opening 14 is seen from the rear.

The opening 14 has a central opening 28, for example intended to receive the rear window (not shown). The opening 14 comprises an exterior panel 30 and a reinforcing lining 32. The reinforcement lining 32 fits the exterior panel 30 and stiffens it. It extends substantially over the entire extent of the opening 14.

The opening 14 also includes two longitudinal uprights 34. The longitudinal uprights 34 extend mainly longitudinally. They also extend vertically. The longitudinal uprights 34 are formed by the reinforcing lining 32. The longitudinal uprights 34 border the central opening 28 transversely.

The opening 14 is optionally provided with a spoiler 36. The spoiler 36 forms a surface in the extension of the roof of the motor vehicle. Its upper surface is generally horizontal. It creates a break in relation to the rear window 22. The spoiler 36 is carried by the reinforcing lining 32. The spoiler 36 extends substantially over the entire width of the opening 14. The spoiler 36 passes transversely through the central opening 28.

There presents an opening 14 of a motor vehicle. The motor vehicle may correspond to that presented in relation to one of Figures 1 to 2. The opening 14 is shown from the outside, the exterior panel is omitted for the sake of clarity.

The reinforcing lining 32 partially delimits a recess 40. The recess 40 is delimited behind by a boss 42, and in front by a first wall 44. The first wall 44 is generally vertical. Its front face is intended to receive the pivoting joint 24 (shown in dotted lines). The reinforcing lining 32 also has at least one, preferably two reinforcing partitions 46. The reinforcing partitions 46 project into the recess 40. They are vertical. The reinforcement partitions 46 extend longitudinally from the boss 42 towards the first wall 44. Thus, the reinforcement partitions 46 stiffen the reinforcement lining 32 in the fixing zone 48 of the pivoting joint.

The boss 42 and the first wall 44 have fixing orifices 50 intended for the assembly of a fixing reinforcement (not shown) which cooperates with the pivoting joint 24 through the reinforcing lining 32. Although a only side and only one pivoting joint 24 is represented, the present teaching applies to both sides of the opening, and in particular to each fixing zone 48 of pivoting joint 24, to each fixing reinforcement.

There shows a fixing reinforcement 54 for opening 14 of a motor vehicle. The motor vehicle may correspond to that presented in relation to one of Figures 1 to 3. The is a partial view of the opening 14, however those skilled in the art will apply the present teaching to the right side by symmetry.

The recess 40 comprising a bottom surface 56. The bottom surface 56 is formed by the reinforcing lining 32.

The fixing reinforcement 54 comprises a first fixing zone 58, a junction 60 and a second fixing zone 62. The junction 60 is between, and connects the first fixing zone 58 to the second fixing zone 62. The junction 60 spans the recess 40. The first fixing zone 58 is fixed to the reinforcing lining 32 at the level of the first wall 44. The junction 60 passes longitudinally the recess 40. The fixing reinforcement 54 can be a reinforcing element coming from matter.

According to another interpretation, the first fixing zone 58 forms a first branch of the fixing reinforcement 54, and the second fixing zone 62 with the junction 60 form a second branch which is inclined relative to the first branch.

The second fixing zone 62 is longitudinally opposite the first fixing zone 58 with respect to the recess 40. The junction 60 is at a distance from the bottom surface 56. It is in elevation relative to the surface of bottom 56.

The junction 60 forms a ribbon 61 or a strip of material. It is generally flat and of constant thickness. The second fixing zone 62 is coplanar with the junction 60, and in its extension. The junction 60 also has at least one stiffening rib 64, preferably two stiffening ribs 64, in particular on each side of the ribbon 61.

Each stiffening rib 64 can extend between the first fixing zone 58 and the second fixing zone 62. They form lateral stiffening ribs 64, on either side of the junction 60. They are generally perpendicular to the strip 61. The ribbon 61 is straight and substantially of constant width. The transverse width of the ribbon 61 varies by at most 20%, preferably by at most 10%. Generally, at least one or each stiffening rib 64 is inclined relative to the strip 61.

The reinforcing lining 32 has a bonding zone 66. The bonding zone 66 can form a rebate. The bonding zone 66 forms a bonding track running around the rear window 22. An adhesive (not shown), such as a bead of glue, fixes the rear window 22 in the opening 14. The second fixing zone 62 is adjoining the bonding zone 66. The second fixing zone 62 is at the level of the bonding zone 66. Thus, the rigidities of the glass wall and the fixing reinforcement 54 complement each other.

The fixing reinforcement 54 is offset inwards relative to the associated longitudinal upright 34, that is to say on the same side. Each fixing reinforcement 54 is transversely between the two longitudinal uprights 34. This arrangement frees up space for the integration of other organs.

The exterior panel 32 comprises a first material with a first Young's modulus, for example of at most 10 GPa (giga Pascal), preferably at most 3 GPa. The reinforcing lining 32 comprises a second material with a second Young's modulus, for example of at least 50 GPa, preferably of at least 200 GPa. The second Young's modulus is greater than the first Young's module, preferably at least five times greater, preferably at least fifty times greater. For example, the first material comprises a plastic material, such as polyamide or polypropylene; the second material comprises a metallic material such as steel or an aluminum alloy.

The reinforcing lining 32 can be produced by molding. The fixing reinforcement 54 can be produced by stamping, then be fixed by screwing to the fixing reinforcement 54 after demolding.

There is a section of the opening 14 of a motor vehicle along the fixing reinforcement 40. The motor vehicle may correspond to that presented in relation to one of Figures 1 to 4.

In the opening 14, the outer panel 30 covers the reinforcing lining 32. The recess 40 is provided vertically between the outer panel 30 and the outer surface 68 of the reinforcing lining 54. The reinforcing lining 32 comprises an inner surface 70 opposite the external surface 68. The latter faces the external panel 30 and the fixing reinforcement 54.

At the level of the recess 40, the reinforcing lining 32 forms a shell. The pivot joint 24 is attached to the internal surface 70, or front surface. The pivot joint 24 is spaced from the outer surface 68 of the reinforcing liner 32. The pivot joint 24 is also separated from the bottom surface 56. The bottom surface 56 is a portion or area of the outer surface 68 which extends beyond the recess 40.

The fixing reinforcement 54 is arranged in the recess 40. It is oriented so that its first fixing zone 58 is connected to the first wall 44, and is connected to the pivoting joint 24 through this first wall 44. The first fixing zone 58, the first wall 44, and the pivoting joint 24 form a longitudinal stack. The second fixing zone 62 is separated from the first fixing zone 58 by the recess 40.

The junction 60 extends in a straight line from the first fixing zone 58 to the second fixing zone 62, which makes it possible to increase the rigidity. The junction 60 is substantially flat, at least its upper surface. The rectilinear appearance of the ribbon 61 stands out. Likewise, the interposed character of the ribbon 61 between the exterior panel 30 and the fixing reinforcement 54 springs.

The reinforcing partition 64 of the reinforcing lining 32 projects towards the fixing reinforcement 54 and extending along the fixing reinforcement 54. The stiffening rib 64 extends along the reinforcing partition 46, which again improves the rigidity of the fixing zone 48. The reinforcing partition 46 projects from the bottom surface 56. In addition to or as an alternative to the stiffening ribs 64, the junction 60 can include a longitudinal boss (not shown). Such a longitudinal boss reduces the bending of the junction 60 around the Y axis.

The opening 14 has a vertical stack. The vertical stack is optionally topped by the spoiler 36. The opening 14 comprises a fixing axis 72 fixed to the spoiler 36. The vertical stack is defined by the elements connected by the fixing axis 72. The fixing axis 72 passes through the reinforcing lining 32, the second fixing zone 62 and the exterior panel 30.

The spoiler 36 has a longitudinal length greater than or equal to 100 mm, preferably greater than or equal to 300 mm. The spoiler 36 overlaps the fixing reinforcement 54, in particular longitudinally. It overlaps the second fixing zone 62 and a longitudinal section of the junction 60. The fixing boss 42 delimits the recess 40. The fixing boss 42 receives the fixing axis 72.

According to a not shown alternative of the invention, the spoiler is formed by the exterior panel.

The exterior panel 30 comprises a first surface 74 delimiting the recess 40 and a second surface 76 opposite the first surface 74. The second surface 76 faces the exterior of the motor vehicle and therefore of the opening 14. The junction 60 is separated and distant from the first surface 74.

The fixing reinforcement 54 has a constant thickness. The fixing reinforcement 54 is in one piece. It includes an elbow 78 connecting the first fixing zone 58 to the junction 60. The elbow 78 is arranged in the recess 40. The elbow 78 defines an angle greater than or equal to 90°.

The first fixing zone 58 is a first fixing end. The second fixing zone 62 is a second fixing end. The recess 40 comprising a first termination on the side of the pivoting joint 24 and an end termination opposite the first termination and on the side of the second fixing zone 62. The terminations are respectively on the sides of the fixing ends.

The recess 40 has a separation space 80 between the junction 60 and the external surface 68, and in particular the bottom surface 56. The separation space has a thickness according to the thickness of the junction 60, and/or according to the vertical direction. The first fixing zone 58 is at a distance from the bottom surface 56. The at least one stiffening rib 64 projects towards the bottom surface 56.

The fixing reinforcement 54 comprises a first thickness, and the reinforcement lining 32 comprises a second thickness greater than the first thickness. This aspect makes it possible to optimize the mass and rigidity of the opening 14. In the recess 40, the junction 60 of the fixing reinforcement 54 is closer to the exterior panel 30 than to the reinforcing lining 32. This improves the stiffening effect provided in fixing zone 48.

The pivoting joint 24 is fixed to the fixing reinforcement 54 through the reinforcing lining 32, for example with a screw 82 which passes through the first wall 44. Thus, the screw 82 has a multiple function. This aspect limits assembly operations.

Claims (10)

Opening (14) of a motor vehicle (10) comprising an exterior panel (30); a reinforcing liner (32); a recess (40) between the outer panel (30) and the reinforcing liner (32), said recess (40) comprising a bottom surface (56); a fixing reinforcement (54) with a first fixing zone (58) to the reinforcing liner (32), said fixing reinforcement (54) being in the recess (40); a pivot joint (24) attached to the reinforcement liner (32) at the first attachment area (58) of the attachment reinforcement (54); characterized in that the fixing reinforcement (54) comprises a second fixing zone (62) to the reinforcing liner (32) which is opposite the first fixing zone (58) with respect to the recess ( 40), and a junction (60) which connects the first fixing zone (58) to the second fixing zone (62) and which passes through the recess (40) at a distance from the bottom surface (56). Opening (14) according to claim 1, characterized in that the junction (60) comprises a ribbon (61) and at least one stiffening rib (64) extending between the first fixing zone (58) and the second zone fixing (62). Opening (14) according to one of claims 1 to 2, characterized in that the opening (14) comprises a glazed wall, a bonding zone (66) on the reinforcing lining (32), and a fixing adhesive from the glass wall to the bonding zone (66); the second fixing zone (62) is adjacent to the bonding zone (66); preferably the recess (40) comprises a separation space (80) between the junction (60) and the bottom surface (56). Opening (14) according to one of claims 1 to 3, characterized in that the opening (14) comprises a spoiler (36), and the opening (14) comprises a fixing axis (72) fixed to the spoiler ( 36) and passing through: the reinforcing lining (32), the second fixing zone (62) and the exterior panel (30); preferably the spoiler (36) extends substantially over the entire width of the opening (14) and has a length greater than or equal to 100 mm. Opening (14) according to one of claims 1 to 4, characterized in that the exterior panel (30) comprises a first surface (74) delimiting the recess (40) and a second surface (76) opposite the first surface (74) and arranged outwards, the junction (60) being at a distance from said first surface (74). Opening (14) according to one of claims 1 to 5, characterized in that the fixing reinforcement (54) comprises an elbow (78) connecting the first fixing zone (58) to the junction (60), and the first fixing zone (58) is arranged in the recess (40). Opening (14) according to one of claims 1 to 6, characterized in that the opening (14) comprises two longitudinal uprights (34), the fixing reinforcement (54) being transversely between the two longitudinal uprights (34). Opening (14) according to one of claims 1 to 7, characterized in that the reinforcing lining (32) comprises at least one reinforcing partition (46) projecting towards the fixing reinforcement (54) and extending the along the fixing reinforcement (54), preferably the reinforcing lining (32) comprises a fixing boss (42) fixed to the second fixing zone (62) and the at least one reinforcing partition (46) extending from said fixing boss (42). Opening (14) according to one of claims 1 to 8, characterized in that the exterior panel (30) comprises a first material with a first Young's modulus, and the reinforcing lining (32) comprises a second material with a second Young module greater than the first Young module; preferably the first material comprises a plastic material, and the second material comprises a metallic material. Motor vehicle (10) comprising an opening (14), characterized in that the opening (14) conforms to one of claims 1 to 9, preferably, the opening (14) is a rear trunk flap (20). ).