Motor vehicle comprising a side member having an inner surface comprising a stamped part

Abstract

The invention relates to a motor vehicle comprising a front running gear and a rear running gear, wherein the points of contact between the running gears and the ground define a base plane (XY) defined by a first longitudinal direction (X) corresponding to travelling in a straight line, a second direction (Y) that is transverse and orthogonal to the first longitudinal direction (X), and a third vertical direction (Z) orthogonal to the first (X) and second (Y) directions and oriented away from the ground, said vehicle comprising a chassis and said chassis comprising a side member positioned on one of the lateral sides of the vehicle in the second direction (Y), said side member being positioned towards the rear of the vehicle in the first direction (X), said side member comprising an inner surface oriented towards the center of the vehicle, characterized in that the inner surface comprises a stamped part.

Description

[0001] DESCRIPTION

[0002] TITLE OF THE INVENTION: MOTOR VEHICLE COMPRISING A SIDER BEAM HAVING AN INNER FACE INCLUDING A SOCKET

[0003]

[0001] The present invention claims priority from French application 2412033 filed on November 4, 2024, the content of which (text, drawings, and claims) is incorporated herein by reference. The invention relates to motor vehicle chassis, in particular to side members.

[0004]

[0002] Prior art patent application FR3120046 is known, describing a shock-absorbing assembly for a motor vehicle, particularly for side impacts caused by collisions with trees or poles. The vehicle has a side member. The shock-absorbing assembly comprises an outer panel and an inner panel. The inner panel is attached to the outer panel. Both the outer and inner panels are located in one of the vehicle's doors. Each outer and inner panel has an end portion covering the side member. The shock-absorbing assembly includes an energy-absorbing reinforcement positioned between the end portion of the outer panel and the end portion of the inner panel. The energy-absorbing reinforcement has a compressible energy-absorbing zone.The energy absorption zone has a honeycomb profile consisting of two stamped metal sheets forming several closed cells arranged vertically, one above the other, between the lower and upper sections of the inner panel. However, some drawbacks remain. Adding the shock absorber assembly increases the vehicle's overall weight and results in a significant additional cost during production. Furthermore, the absorber assembly is quite large, making its integration within the vehicle difficult.

[0005]

[0003] The objective of the present invention is to remedy these drawbacks and to reinforce the stiffness of the vehicle side member to reduce the risks of deformation and shearing of the side member during a side impact.

[0004] To achieve this objective, the invention proposes a motor vehicle comprising a front running gear and a rear running gear whose points of contact with the ground define a base plane defined by a first longitudinal direction corresponding to driving in a straight line, by a second transverse direction orthogonal to the first longitudinal direction and a third vertical direction orthogonal to the first and second directions and is oriented away from the ground, said vehicle comprising a chassis, said chassis comprising a side member positioned on one of the lateral sides of said vehicle along the second direction, said side member being positioned towards the rear of said vehicle along the first direction, said side member comprising an inner face oriented towards the center of the vehicle, characterized in that said inner face comprises a stamping.

[0006]

[0005] Thanks to the invention, the risks of deformation and shearing of the side member are reduced when a lateral impact occurs.

[0007]

[0006] Advantageously, the stamping has two first portions parallel to each other and a plurality of second portions positioned between the first two portions, the second portions being substantially perpendicular to the first portions.

[0008]

[0007] A grid-shaped stamping is more effective in stiffening the side member and allows for optimization of the side member mass, and therefore the overall mass of the vehicle.

[0009]

[0008] Preferably, the stamping comprises six second portions.

[0010]

[0009] Advantageously, the second portions are spaced from each other by a predetermined distance.

[0011]

[0010] A regular stamping more effectively reduces the risk of deformation of the side member during a side impact.

[0012]

[0011] Advantageously, said predetermined distance is between 20 mm and 40 mm, preferably 33 mm.

[0013]

[0012] Advantageously, the second portions each have a length between 40 mm and 70 mm, preferably 59 mm.

[0014]

[0013] Preferably, the inner face comprises a first part and a second part, the first part being substantially perpendicular to the second part, the stamping extending over the first part and over the second part, the first portions on the first part having a length between 60 mm and 80 mm, the first portions on the second part having a length between 130 mm and 150 mm.

[0015]

[0014] Preferably, the length of the first portions on the first part is equal to 71 mm, the length of the first portions on the second part being equal to 140 mm.

[0016]

[0015] Advantageously, said vehicle comprises two longitudinal members, a first longitudinal member being positioned on the right of said vehicle along the second direction, a second longitudinal member being positioned on the left of said vehicle along the second direction.

[0017]

[0016] The invention will be further detailed by the description of a non-limiting embodiment, and on the basis of the attached figure illustrating the invention, in which [Fig.1] schematically illustrates a side member of a motor vehicle chassis comprising a stamping according to an embodiment of the invention.

[0018]

[0017] A side member of a motor vehicle chassis is schematically illustrated in Figure 1. The vehicle comprises a front axle and a rear axle whose points of contact with the ground define a basic plane XY defined by a first longitudinal direction X corresponding to straight-line travel, a second transverse direction Y orthogonal to the first longitudinal direction X, and a third vertical direction Z orthogonal to the first direction X and the second direction Y and oriented away from the ground. Generally, motor vehicles have a plurality of side members positioned at different locations within the vehicle. In the context of the invention, the side member is positioned on one of the lateral sides, right or left, of said vehicle along the second direction Y. In addition, the side member is positioned towards the rear of said vehicle along the first direction X.Preferably, the motor vehicle has two side members: one positioned on the right side and the other on the left side, along the second Y direction. Each side member has an inner face oriented towards the center of the vehicle. This inner face has a stamped section. A stamped section is a metal part shaped by deforming a sheet of metal using a punch and die, giving it a three-dimensional form without causing breakage. The purpose of the stamped section is to stiffen the side member to prevent deformation, particularly shearing, in the event of a side impact, such as a side impact against a small surface, like a pole.Preferably, the stamping has a grid or grid shape formed by two first portions 1 parallel to each other and a plurality of second portions 2 positioned between the two first portions 1. The second portions 2 are substantially perpendicular to the first portions 1. Preferably, the stamping comprises six second portions 2, as shown in Figure 1. Optionally, the second portions 2 are arranged regularly and spaced from each other by a predetermined distance of between 20 mm and 40 mm. Preferably, the predetermined distance is 33 mm. In addition, the second portions 2 preferably have a length of between 40 mm and 70 mm. In a preferred embodiment, the length is 59 mm. Optionally, the stringer comprises a first part 3 and a second part 4, as shown in Figure 1.The first section 3 is substantially perpendicular to the second section 4. The stamping then extends over the first section 3 and the second section 4. Indeed, in Figure 1, the first two sections 1 are each positioned partially on the first section 3 and on the second section 2. In addition, two second sections 2 are positioned on the first section 3, while four second sections 2 are positioned on the second section 4. Optionally, the first sections 1 on the first section 3 have a length between 60 mm and 80 mm, preferably 71 mm. Optionally, the first sections 1 on the second section 4 have a length between 130 mm and 150 mm, preferably 140 mm.

Claims

DEMANDS 1. Motor vehicle comprising a front running gear and a rear running gear whose points of contact with the ground define a base plane (XY) defined by a first longitudinal direction (X) corresponding to straight-line driving, by a second transverse direction (Y) orthogonal to the first longitudinal direction (X) and a third vertical direction (Z) orthogonal to the first direction (X) and to the second direction (Y) and is oriented away from the ground, said vehicle comprising a chassis, said chassis comprising a side member positioned on one of the lateral sides of said vehicle along the second direction (Y), said side member being positioned towards the rear of said vehicle along the first direction (X), said side member comprising an inner face oriented towards the center of the vehicle, characterized in that said inner face comprises a stamping.

2. Vehicle according to claim 1 characterized in that the stamping has two first portions (1) parallel to each other and a plurality of second portions (2) positioned between the two first portions (1), the second portions being substantially perpendicular to the first portions.

3. Vehicle according to claim 2 characterized in that the stamping comprises six second portions (2).

4. Vehicle according to claim 2 or 3 characterized in that the second portions (2) are spaced apart from each other by a predetermined distance.

5. Vehicle according to claim 4 characterized in that said predetermined distance is between 20 mm and 40 mm, preferably 33 mm.

6. Vehicle according to any one of claims 2 to 5 characterized in that the second portions (2) each have a length between 40 mm and 70 mm, preferably 59 mm.

7. Vehicle according to any one of claims 2 to 6 characterized in that the inner face comprises a first part (3) and a second part (4), the first part (3) being substantially perpendicular to the second part (4), the stamping extending over the first part (3) and over the second part (4), the first portions (1 ) on the first part (3) having a length between 60 mm and 80 mm, the first portions (1 ) on the second part (4) having a length between 130 mm and 150 mm.

8. Vehicle according to claim 7 characterized in that the length of the first portions (1 ) on the first part (3) is equal to 71 mm, the length of the first portions (1 ) on the second part (4) being equal to 140 mm.

9. Vehicle according to any one of claims 1 to 8 characterized in that said vehicle comprises two longitudinal members, a first longitudinal member being positioned on the right of said vehicle along the second direction (Y), a second longitudinal member being positioned on the left of said vehicle along the second direction (Y).

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