On-board computer support for a vehicle

Abstract

The present invention relates to a computer support component to be welded to a base (100) of a motor vehicle (preferably an electric vehicle) to form a support component for an on-board computer of the vehicle. The computer support component includes: - a stiffening plate (10), - a screw-on fixing component for fixing the computer to the computer support component by screwing. The computer support component is characterized in that it includes a crossbeam (30) configured to be fixed to the base (100) along the lateral direction of the vehicle, wherein the stiffening plate (10) is welded to the crossbeam (30).

Description

Technical Field

[0001] This invention claims priority to French application 2006250, filed on June 16, 2020, the contents of which (text, drawings and claims) are incorporated herein by reference.

[0002] This invention generally relates to a computer support for receiving a computer mounted on a motor vehicle. In particular, the invention relates to a computer support to be welded to a base (the lower part of the vehicle chassis) to receive an acceleration measuring computer, which is generally used for controlling pyrotechnique safety devices in the event of a collision. Background Technology

[0003] Computer support components are known in the prior art. In particular, document CN209191845 describes a mounting support for assembling an airbag computer in a motor vehicle, the support taking the form of a nervurée, which is generally welded to a channel in the base. However, in vehicles with specific bases that may have weaker stiffness or inertia, such a nervurée may be insufficient to guarantee accurate measurement of acceleration / deceleration applied to the vehicle. This necessitates adapting the measurement and / or triggering thresholds or sensitivities of the computer, requiring a specific computer model. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art mentioned above, and in particular, to provide a computer support that ensures accurate measurement of acceleration / deceleration applied to the vehicle.

[0005] Therefore, a first aspect of the present invention relates to a computer support member to be welded to the base of a motor vehicle (preferably an electric vehicle) to form a support member for the vehicle's onboard computer, the computer support member comprising:

[0006] - ribs,

[0007] - A screw-on fixing component, which is used to fix the computer to the computer support by screwing.

[0008] The computer support is characterized by a crossbeam configured for securing to the base along the lateral direction of the vehicle, wherein the stiffening plates are welded to the crossbeam. The crossbeam, integrated with the computer support, allows the stiffening plates and the computer mounting components to be securely anchored to the base, ensuring that acceleration / deceleration applied to the vehicle is correctly transmitted to the computer. Specifically, the crossbeam extends along the lateral direction of the vehicle and is generally anchored to the vicinity of the lateral edge of the base, providing good transmission of acceleration / deceleration during a lateral collision. The resulting inertia and / or stiffness ensure similar stiffness / inertia conditions to a more rigid base. Therefore, a standard computer can be used.

[0009] Advantageously, the screw-on fastening component includes at least one pin passing through the crossbeam and the stiffening plate and including a shoulder, the shoulder being welded to a first side of the crossbeam opposite to a second side of the crossbeam, to which the stiffening plate is welded. In other words, the crossbeam is sandwiched between the shoulder of the pin and the stiffening plate to ensure good inertia / stiffness of the assembly.

[0010] Advantageously, the computer support includes three pins passing through the crossbeam and the stiffening plate, and the stiffening plate includes:

[0011] - A centering hole, which fits into the first pin to lock two translations along a plane perpendicular to the axial direction of the first pin.

[0012] - A positioning hole, which engages with the second pin to lock a single translation along a plane perpendicular to the axial direction of the first pin.

[0013] - A free hole, which fits into the third pin, allowing two translations free along a plane perpendicular to the axial direction of the first pin. The assembly prior to welding is not statically indeterminate, but remains precise, featuring a well-positioned (and therefore with virtually no clearance) centering hole and a locating hole that locks in individual translations.

[0014] Advantageous:

[0015] -The stiffening plate has a first thickness.

[0016] The crossbeam has a second thickness that is less than the first thickness. This embodiment ensures that the crossbeam is as lightweight as possible.

[0017] Advantageous:

[0018] - The first thickness is greater than or equal to 1.75 mm, preferably greater than or equal to 1.95 mm.

[0019] - The second thickness is less than or equal to 1.65 mm, preferably less than or equal to 1.55 mm.

[0020] Advantageous:

[0021] - The stiffener has an elastic limit Re of at least 350 MPa.

[0022] - The crossbeam has an elastic limit Re of at least 450 MPa and / or a fracture limit Rm of at least 590 MPa.

[0023] Advantageously, the crossbeam has a length greater than or equal to 80% of the width of the base. This embodiment enables good transmission of acceleration / deceleration during lateral or rod impacts.

[0024] Advantageously, the stiffening plate has ribs to have a total height between 2 and 3 times its own thickness, preferably greater than 2.5 times its own thickness. This stiffening method provides good inertia / stiffness while requiring less space.

[0025] Advantageously, the crossbeam has one or more ribs having a total height between two and three times the thickness of the crossbeam. This stiffening provides good inertia / stiffness without requiring much space. Advantageously, the one or more ribs are oriented along the longitudinal direction of the crossbeam (the transverse direction of the vehicle).

[0026] A second aspect of the invention relates to a vehicle base, the base including a computer support according to a first aspect of the invention.

[0027] Advantageously, the vehicle's base includes a longitudinal channel portion, and the crossbeam has a front surface configured less than 20 mm from the rear surface of a component (e.g., a speed controller reinforcement) to form at least a portion of the longitudinal channel. Acceleration / deceleration measurements are weak in the event of a frontal collision because the channel portion is rigid along the longitudinal direction, and the crossbeam is spaced slightly from, or even attached to, the component forming the channel.

[0028] A third aspect of the invention relates to a motor vehicle that includes a computer support according to a first aspect of the invention. Attached Figure Description

[0029] Other features and advantages of the invention will become more apparent from the following detailed description and accompanying drawings, which are given by way of non-limiting example of embodiments of the invention, in which:

[0030] - Figure 1 A general view of the computer support component according to the present invention is shown;

[0031] - Figure 2 It shows Figure 1 A perspective view of the stiffening ribs of the computer support components;

[0032] - Figure 3 It shows Figure 1 A cross-sectional view of the computer support components;

[0033] - Figure 4 It shows Figure 1 A top view of the computer support components;

[0034] - Figure 5 It shows Figure 1 A view of the computer support component, which is welded to the base of the vehicle. Detailed Implementation

[0035] Figure 1 A computer support assembly is shown, comprising a stiffening plate 10 (shaded for easy identification), a crossbeam 30, and three pins 20. This computer support assembly is intended for welding to the base of a vehicle to subsequently receive the vehicle's computer (particularly the airbag computer, i.e., the acceleration / deceleration measurement unit applied to the vehicle).

[0036] To provide suitable rigidity and inertia, the computer support includes a crossbeam fixed to the base along the lateral direction of the vehicle, such that the lateral portion 31 of the crossbeam is fixed near the edge of the base, while stiffening plates 10 are welded to the central portion 32 of the crossbeam 30.

[0037] like Figure 2 As shown, the stiffening plate 10 has ribs 14 on its entire surface to provide greater rigidity. The stiffening plate 10 is generally welded to the crossbeam 30, for example, by spot welding. Multiple spot welds (up to about 10 or more) may be provided to ensure that the crossbeam 30 and the stiffening plate 10 are well integrated, thereby ensuring that the computer support is rigidly and integrally connected to the central portion of the crossbeam.

[0038] like Figure 3As shown, three shouldered pins 20 (but other numbers may be provided) are fixed to the lower surface of the beam 30 via their respective shoulders (by welding), while the stiffening plate 10 is welded to the upper surface of the beam 30. All three pins have the same upward orientation.

[0039] Figure 4 A top view of the central portion 32 of the beam 30, including the stiffener 10, is shown. To ensure proper positioning and non-static indeterminate nature of the stiffener 10, the stiffener includes:

[0040] - Centering hole 11, which fits into the first pin 20 to lock two translations (here X and Y) along a plane perpendicular to the axial direction of the first pin 20.

[0041] - Positioning hole 12, which engages with the second pin 20 to lock a single translation (here, X) along a plane perpendicular to the axial direction of the first pin 20.

[0042] - Free hole 13, which fits on the third pin 20 to allow two translations (X and Y) to be free along a plane perpendicular to the axial direction of the first pin 20.

[0043] Figure 5 A computer support component welded to a base 100 is shown. The base shown here is generally used in electric vehicles, as it can be noted that the central channel (which is partially formed by part 110 (speed controller support, even though electric vehicles are not specifically discussed in terms of transmission controllers)) stops at the position of the crossbeam 30 and does not extend over the entire length of the base 100, which can therefore form or receive a battery tray in its central portion (partially below the crossbeam 30).

[0044] Due to the considerable length of the crossbeam 30, the two lateral portions 31 of the crossbeam 30 are positioned near the lateral edges of the base (e.g., less than 300 mm). Thus, the deceleration / acceleration of a lateral impact is correctly transmitted to the computer mounted on the pin 20.

[0045] Finally, it can be noted that the front surface of the crossbeam 30 is in contact with or nearly in contact with the part 110 that terminates the central channel. The same is true for the stiffener 10. In particular, a space of less than 50 mm (advantageously less than 20 mm) can be provided, or even here in the contact between the part 110 and the crossbeam 30, so that the deceleration / acceleration of a forward collision is correctly transmitted to the computer mounted on the pin 20.

[0046] Therefore, thanks to the computer support described above, deceleration / acceleration measurements during a vehicle collision are performed very well by the onboard computer. Thus, the same trigger thresholds can be set for safety modules (airbags, seatbelt pretensioners) and for vehicles with a central tunnel or no crossbeam along the entire length of the base.

[0047] The crossbeams 30 and / or stiffening plates are generally made of steel plates by cutting / stamping.

[0048] For example, without limitation, the stiffening plate 10 is thicker than the crossbeam 30 and may be made of high elastic limit steel with an elastic limit Re > 350 MPa, and / or, a thickness > 1.8 mm. The crossbeam 30 may be made of high elastic limit steel with an elastic limit Re > 450 MPa, and / or, a thickness > 1.3 mm.

[0049] It is understood that various modifications and / or improvements that are obvious to those skilled in the art can be added to different embodiments of the invention without departing from the scope of protection of the invention. In particular, referring to the pin, a nut welded to the computer support can be provided, the nut may, for example, receive a screw + washer or a screw with a shoulder.

Claims

1. A computer support component, said computer support component to be welded to a base (100) of a motor vehicle to form a support component for an on-board computer of said motor vehicle, said computer support component comprising: - ribs (10), - A screw-on fixing component, used to fix the vehicle-mounted computer to the computer support member by screwing. The computer support component is characterized by comprising a crossbeam (30) configured to be fixed to the base (100) along the lateral direction of the vehicle, wherein the stiffening ribs (10) are welded to the crossbeam (30). Furthermore, the screw-on fixing component includes at least one pin (20) that passes through the crossbeam (30) and the stiffening plate (10) and includes a shoulder. The shoulder is welded to the first side of the crossbeam (30), which is opposite to the second side of the crossbeam (30), and the stiffener (10) is welded to the second side.

2. The computer support component according to claim 1, wherein, The computer support component is to be welded onto the base (100) of the electric vehicle.

3. The computer support component according to claim 1, wherein the computer support component comprises three pins (20) passing through the crossbeam (30) and the stiffening plate (10), wherein, The stiffening plate (10) includes: - A centering hole (11) that fits into the first pin (20) to lock two translations along a plane perpendicular to the axial direction of the first pin. - A positioning hole (12) that engages with the second pin (20) to lock a single translation along a plane perpendicular to the axial direction of the first pin (20). - Free hole (13), which fits on the third pin (20) to allow two translations to be free along a plane perpendicular to the axial direction of the first pin (20).

4. The computer support component according to any one of claims 1 to 3, wherein: - The stiffening plate has a first thickness. - The crossbeam (30) has a second thickness that is less than the first thickness.

5. The computer support component according to claim 4, wherein, - The first thickness is greater than or equal to 1.75 mm. - The second thickness is less than or equal to 1.65 mm.

6. The computer support component according to claim 5, wherein, - The first thickness is greater than or equal to 1.95 mm. - The second thickness is less than or equal to 1.55 mm.

7. The computer support component according to any one of claims 1 to 3, 5 and 6, wherein, The crossbeam (30) has a length greater than or equal to 80% of the width of the base (100).

8. The computer support component according to any one of claims 1 to 3, 5 and 6, wherein, The rib (10) has ribs (14) so ​​as to have a total height between 2 and 3 times its own thickness.

9. The computer support component according to claim 8, wherein, The stiffening plate (10) has stiffeners (14) so ​​that it has a total height that is more than 2.5 times its own thickness.

10. A vehicle base (100) comprising a computer support according to any one of claims 1 to 9.

11. The vehicle base (100) according to claim 10, wherein the base includes a longitudinal channel portion, wherein, The crossbeam (30) has a front surface configured to be less than 20 mm from the rear surface of the part (110) to form at least a portion of the longitudinal channel.

12. The base (100) of the vehicle according to claim 11, wherein the part (110) is a speed controller reinforcement.

13. A motor vehicle comprising a computer support according to any one of claims 1 to 9.

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