WO2008090274A1 - Device for connecting two structural members of an automotive vehicle - Google Patents

Device for connecting two structural members of an automotive vehicle Download PDF

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Publication number
WO2008090274A1
WO2008090274A1 PCT/FR2007/002043 FR2007002043W WO2008090274A1 WO 2008090274 A1 WO2008090274 A1 WO 2008090274A1 FR 2007002043 W FR2007002043 W FR 2007002043W WO 2008090274 A1 WO2008090274 A1 WO 2008090274A1
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WO
WIPO (PCT)
Prior art keywords
connecting device
steering column
structural element
motor vehicle
longitudinal direction
Prior art date
Application number
PCT/FR2007/002043
Other languages
French (fr)
Inventor
Eric Julliot
Original Assignee
Faurecia Interieur Industrie
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 Faurecia Interieur Industrie filed Critical Faurecia Interieur Industrie
Publication of WO2008090274A1 publication Critical patent/WO2008090274A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/16—Steering columns
    • B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
    • B62D1/19—Steering columns yieldable or adjustable, e.g. tiltable incorporating energy-absorbing arrangements, e.g. by being yieldable or collapsible
    • B62D1/195—Yieldable supports for the steering column
    • 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
    • B62D25/14—Dashboards as superstructure sub-units
    • B62D25/145—Dashboards as superstructure sub-units having a crossbeam incorporated therein
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/04—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
    • B60R21/05—Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings associated with the steering wheel, steering hand lever or steering column

Definitions

  • the present invention relates to a device for connecting structural elements of a motor vehicle, and a motor vehicle comprising it. More precisely,
  • the invention applies essentially to the connection formed between a lower berry beam and a dashboard cross member provided with a steering column support.
  • a bay subassembly is produced, in particular for the windshield support and which has a lower crossmember.
  • a dashboard subassembly is also produced that includes a dashboard cross member, in particular for carrying a steering column support.
  • the dashboard transom subassembly if it were independent, should have a very high mechanical strength so as not to transmit uncomfortable vibrations to the driver, via the steering column. It is known that the vibrations felt by a driver holding a steering wheel mounted on a steering column must be low, preferably at low preferences.
  • FIG. 1 shows a portion of FIG. 1 of US-5,452,916 which shows a connecting device comprising four angled branches connecting front and rear quadrilaterals.
  • the connecting device comprises cheeks which overlap a steering column support part, so that this connecting device is bulky and bulky, and on the other side, it is welded to the cross member part. lower bay.
  • FIGS. 2 and 5 extracted respectively from documents DE-34 27 211 and US-4 531 760, show connecting devices placed substantially in a vertical plane containing the steering column and which are intended to deform in the event of shock.
  • Figure 3 extracted from US-4,627,306, shows a connecting device essentially for forming an auxiliary steering support which overlaps the steering column. Due to its simply folded sheet form, it is a support with low resistance to frontal impact, but it does not significantly increase the stiffness of the elements that it connects.
  • Figure 4 taken from DE-19962550, shows a parallelogram connecting device directly mounted on a steering column, in a vertical plane containing the longitudinal direction of the vehicle.
  • Figure 6 extracted from US-3 964 578 shows a connecting device which is not attached to a cross dashboard, but a support for retaining the driver's knees in the event of a frontal impact. It is therefore in a vertical plane containing the steering column.
  • FIG. 7, extracted from the document FR-2 883 245, shows a connecting device placed between a lower berry beam and a steering column support and comprising two non-rectilinear branches placed between fixing devices on the one hand at the lower berry beam and secondly at the steering column support.
  • This document which represents the closest prior art of the invention, describes a device which is symmetrical and which overlaps the steering column. In particular, it surrounds the steering column and occupies an important space on each side of it. It has the advantage of allowing the absorption of frontal shocks by deformation of the two branches in a direction transverse to the longitudinal direction of the motor vehicle.
  • the invention relates to a connecting device which also has two branches, which is made in a simple manner and occupies only a very small space, in particular because it is placed only one side of the steering column.
  • the invention relates to a device for connecting two structural elements of a motor vehicle, the two elements having a horizontal general orientation transverse to the longitudinal direction of displacement of the motor vehicle and comprising a first structural element adjacent to the bumper -brise and a second structural element comprising a dashboard crossmember and a steering column support,
  • the connecting device being of the type which comprises a body having a first device for attaching the connecting device to the first structural element, a second attachment device of the connecting device to the second structural element, and at least two branches arranged between the first and second securing devices and deformable in the transverse direction under the action of a shock applied in the longitudinal direction of the vehicle.
  • the second fixing device is arranged on one side of the steering column, and the two branches of the body are not symmetrical to one another with respect to a longitudinal direction.
  • the second fastener is closer to the center of the second structural member than the steering column.
  • each branch has an open U-shape between the two fasteners.
  • each branch has an angle-shaped section whose one side is substantially horizontal and the other side forms a substantially vertical cheek.
  • the substantially vertical side is advantageously extended by a cheek in at least one of the two fasteners.
  • the two fastening devices are offset with respect to the longitudinal direction of the vehicle.
  • one of the branches has its greater part substantially in the longitudinal direction of the motor vehicle.
  • the first attachment device is formed in a part of the body which is in an almost vertical transverse plane
  • the second attachment device is formed in a part of the body which is in a substantially horizontal transverse plane.
  • the second attachment device is attached to a steering column support.
  • the second attachment device is attached to the dashboard cross member.
  • At least one of the first and second fasteners is a mechanical fastener.
  • the two fixing devices are advantageously maintained by mechanical fasteners.
  • the two branches at least of the connecting device are two in number.
  • the first structural element is a lower rail of the motor vehicle bay.
  • the invention also relates to a motor vehicle, comprising a first structural element consisting of a lower berry beam and a second structural element comprising a dashboard cross member and a steering column support, such as the two elements of structure are connected by a connecting device according to one of the preceding paragraphs.
  • a first advantage of the connecting device according to the invention is that, thanks to its asymmetrical shape and its high mechanical strength, it provides a robust connection between the lower crossbeam and the dashboard crossbar or the column support. direction ; as a result, the vibration frequency of the steering column support is shifted to high frequencies, and the driver feels virtually no vibration when he is holding the steering wheel.
  • a second advantage of the connecting device according to the invention is that, thanks to the asymmetrical shape of the branches, (that is to say that the two branches are not symmetrical to each other in the connecting device and, preferably, each branch does not have a symmetrical shape), each branch can be deformed laterally, that is to say in the transverse direction of the motor vehicle; thus, when a frontal impact is applied between the fasteners and the lower crossbeam and to the dashboard crossmember or the steering column support.
  • the fixing device is therefore an effective device for damping frontal impacts.
  • a third advantage of the connecting device according to the invention is the reduction of the volume occupied by the connecting device, around the steering column, with respect to known devices. Indeed, the device is fixed only on one side of the column, so that the other side is completely free for housing different devices.
  • a fourth advantage of the connecting device according to the invention is that at least one of the two fixing devices is of mechanical type, for example screwed, crimped or riveted, so that it is not necessary to achieve a welding at the time of assembly of the various subassemblies in the body of a motor vehicle.
  • FIG. is a plan view of a portion of the motor vehicle structure comprising a dashboard transom subassembly provided with a steering column support, with a steering column and a steering wheel, and a steering column connecting device according to the invention, this figure indicating the position of the connecting device in a vehicle; and Figures 9 to 14 are various perspective views of the connecting device shown in Figure 8.
  • FIG. 8 shows a subassembly comprising a dashboard cross member 10, having a relatively thin portion 12, ending in a fastener 14 and provided with reinforcements or struts 15, and a relatively wide portion 16 , ending in a fastening device 18 and carrying a steering column support 20.
  • the fixing devices 14 and 18 are intended to be fixed to the body of a motor vehicle, and the reinforcements 15 to the tunnel of the floor of the vehicle .
  • the steering column support 20 supports the steering column 22 which terminates on the driver's side with a steering wheel 24.
  • a connecting device 26 according to the invention intended to be fixed by a first fixing device 30 to a lower crossbeam (not shown), is fixed by a second fixing device 28 to the column support 20 direction (or possibly at part 16 of the dashboard crossbar).
  • Figures 9 to 14 are perspective views of the connecting device 26 whose shape is very elaborate.
  • the body of the connecting device comprises, between the first fastening device 28 and the second 30, two branches 32, 34.
  • the branch 32 has an open U-shape, one side of which is oriented substantially in the longitudinal direction of the motor vehicle while the other side of the open U is widely inclined relative to this longitudinal direction.
  • the branch 34 has an open U shape more rounded than that of the branch 32.
  • the second fastener 28 is substantially in a horizontal plane, while the first fastener 30 is approximately in a vertical plane.
  • Each of the two branches 32, 34 has an angle shape whose one side is practically in the main horizontal plane of the body and the other side forms a substantially vertical cheek 40, 42. It is noted in Figures 10 and 13 that the body, between the two fasteners 28 and 30, has a shape warped with respect to a horizontal plane.
  • the two fasteners 28, 30 cooperate with the corresponding structural element by a mechanical fastening, for example by a bolt passing through a respective orifice 36, 38.
  • the vertical flange 40, 42 of each branch is extended in at least one of the two fasteners 28, 30, and preferably in both as shown (see in particular Figures 11 and 12).
  • FIG. 13 thus represents a cheek portion 44 which increases the mechanical strength of the fixing portion 30.
  • Figure 9 indicates that the two branches 32, 34 form between them a pear-shaped cavity whose length 46 is intended to greatly reduce in the event of a frontal impact.
  • a frontal impact in the longitudinal direction of the associated motor vehicle is practically applied in the direction of the main part of the branch 32 ( Figure 9). Thanks to the U-shape of each of the branches 32, 34 and the warping of the branches (see Figure 10), these easily deform in case of frontal impact sufficient, although they have a great stiffness thanks to their shape of angle iron.
  • the extended surface of the attachment portion 30 allows for the formation of a large area of cooperation with the lower berry beam which gives good rigidity in a vertical direction.
  • the stiffness of the dashboard crossbar is greatly increased in the vertical direction, so that the first mode of vibration of the column of direction is largely shifted to high frequencies.
  • the conditions set for impact resistance in the event of a frontal collision are easily met, so that the intrusion of the deck into the passenger compartment hardly affects the dashboard crossbar.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention relates to a connection device (26) for connecting the lower crossbar of a bay and the crossbar of a dashboard (10) or of a steering column holder (20). The connection device includes a body with a first fixation device (20), a second fixation device (28) and two branches deformable in the transverse direction upon the action of a shock applied in the longitudinal direction of the vehicle. The second fixation device (28) is provided on one side only of the steering column, the two branches are not symmetrical relative to a longitudinal direction, and one at least of the fixation device (28, 30) is a mechanical fixation device. Application in automotive vehicles.

Description

Dispositif de liaison de deux éléments de structure de véhicule automobile Connecting device for two structural elements of a motor vehicle
La présente invention concerne un dispositif de liaison d'éléments de structure de véhicule automobile, ainsi qu'un véhicule automobile le comportant. Plus précisément,The present invention relates to a device for connecting structural elements of a motor vehicle, and a motor vehicle comprising it. More precisely,
1 ' invention s ' applique essentiellement à la liaison formée entre une traverse inférieure de baie et une traverse de planche de bord munie d' un support de colonne de direction .The invention applies essentially to the connection formed between a lower berry beam and a dashboard cross member provided with a steering column support.
La technologie actuelle de fabrication des automobiles comprend la réalisation de sous-ensembles qui sont raccordés à une caisse lors d'un montage final. Chaque sous-ensemble est réalisé de la manière la plus efficace, notamment au point de vue du coût.Current automotive manufacturing technology includes the production of subassemblies that are connected to a box during a final assembly. Each subset is made in the most efficient way, especially from the point of view of cost.
Par exemple, on réalise un sous-ensemble de baie des- tiné notamment au support du pare-brise et qui possède une traverse inférieure. On réalise aussi un sous-ensemble de planche de bord qui comprend une traverse de planche de bord, notamment destinée à porter un support de colonne de direction. Ces deux ensembles sont habituellement fabriqués séparément, dans des installations distinctes.For example, a bay subassembly is produced, in particular for the windshield support and which has a lower crossmember. A dashboard subassembly is also produced that includes a dashboard cross member, in particular for carrying a steering column support. These two sets are usually manufactured separately, in separate installations.
Ces sous-ensembles pourraient être indépendants l'un de l ' autre dans le véhicule , c ' est-à-dire fixés chacun séparément à des éléments de la caisse du véhicule automobile. Cependant, on s'est rendu compte que, pour des raisons de rentabilité, il était souhaitable de relier ces sous- ensembles. Par exemple, le sous-ensemble à traverse de planche de bord, s'il était indépendant, devrait avoir une résistance mécanique très élevée pour ne pas transmettre de vibrations inconfortables au conducteur, par l'intermédiaire de la colonne de direction. On sait en effet que les vibrations ressenties par un conducteur qui tient un volant monté sur une colonne de direction doivent être faibles , de préférence aux basses préférences .These subassemblies could be independent of each other in the vehicle, that is to say each separately attached to elements of the body of the motor vehicle. However, it was realized that for reasons of profitability, it was desirable to connect these subsets. For example, the dashboard transom subassembly, if it were independent, should have a very high mechanical strength so as not to transmit uncomfortable vibrations to the driver, via the steering column. It is known that the vibrations felt by a driver holding a steering wheel mounted on a steering column must be low, preferably at low preferences.
L'utilisation d'une liaison entre ce sous-ensemble à traverse de planche de bord et un sous-ensemble de traverse inférieure de baie permet l ' obtention de la résistance élevée nécessaire de la traverse de planche de bord qui est ainsi rigidifiée . Si la traverse de planche de bord n'était fixée qu ' à ses extrémités , elle ne présenterait qu ' un seul ventre de vibration, et deux noeuds aux extrémités. Par contre, si elle est maintenue en un point intermédiaire de sa longueur, un autre noeud de vibration est créé sur sa longueur, à l'emplacement de la fixation, et il se forme ainsi deux ventres de vibration, correspondant chacun à une longueur réduite de traverse, et donc à une fréquence accrue . En outre, lorsque ce ventre intermédiaire de vibration ainsi créé n'est pas équidistant des deux extrémités, l'énergie de vibration, et donc les fréquences de vibration, se répartissent dans deux plages distantes, évitant l'addition des vibrations dans une même plage de fréquences . Une telle fixation réduit donc la sensation d' inconfort que peut ressentir un conducteur lorsqu'il manie le volant. Un dispositif de liaison est donc en général placé entre la traverse inférieure de baie et la traverse de planche de bord ou le support de colonne de direction. Ce dispositif a d'autres fonctions que le simple amortissement des vibrations qu ' on vient de décrire . Ainsi, le dispositif de liaison doit aussi pouvoir se déformer en présence d'un choc appliqué dans la direction longitudinale du véhicule, à la suite d'une collision. En effet, pour des raisons de sécurité, il est nécessaire que le déplacement d'une traverse inférieure de baie à la suite d'un choc frontal ne soit pas transmis directement à la traverse de planche de bord, mais soit absorbé au moins partiellement, pour la sécurité du conducteur et du passager avant. Le dispositif de liaison doit donc assurer une absorption du choc. En outre, étant donné les nombreuses fonctions élaborées qu ' on attend des automobiles modernes , de nombreux éléments sont logés dans la planche de bord, notamment à proximité du conducteur et donc de la colonne de direction, et il est souhaitable de dégager au maximum l'espace de planche de bord voisin de la colonne de direction.The use of a connection between this dashboard subassembly subassembly and a sub-bay sub-assembly subassembly makes it possible to obtain the necessary high strength of the dashboard crossbar which is thus stiffened. If the dashboard crossbar was fixed at its extremities, it would present only one belly of vibration, and two nodes at the extremities. On the other hand, if it is maintained at an intermediate point of its length, another vibration node is created along its length, at the location of the attachment, and two vibration bellies are thus formed, each corresponding to a reduced length. crossing, and therefore at an increased frequency. In addition, when this intermediate belly of vibration thus created is not equidistant from both ends, the vibration energy, and therefore the vibration frequencies, are distributed in two distant ranges, avoiding the addition of vibrations in the same range of frequencies. Such fixing thus reduces the feeling of discomfort that a driver may feel when handling the steering wheel. A connecting device is therefore generally placed between the lower berry beam and the dashboard crossbar or the steering column support. This device has other functions than the simple damping of the vibrations that have just been described. Thus, the connecting device must also be able to deform in the presence of a shock applied in the longitudinal direction of the vehicle, following a collision. Indeed, for safety reasons, it is necessary that the movement of a lower crossbeam following a frontal impact is not transmitted directly to the dashboard crossbar, but is absorbed at least partially, for the safety of the driver and front passenger. The connecting device must therefore provide shock absorption. In addition, given the many sophisticated functions that are expected of modern automobiles, many elements are housed in the dashboard, especially near the driver and therefore the steering column, and it is desirable to release as much as possible. dashboard space next to the steering column.
Enfin, comme la liaison entre la traverse inférieure de baie et la traverse de planche de bord ou le support de colonne de direction est réalisée sur le véhicule en cours de montage de sous-ensembles séparés, à un stade déjà avancé de ce montage, il n'est pas normalement souhaitable d'utiliser, pour la fixation du dispositif de liaison, des appareils de soudage. En effet, non seulement ils peuvent provoquer un dégagement de chaleur important pouvant détériorer des éléments des deux sous-ensembles, mais encore ils nécessitent l'incorporation d'un appareil de soudage coûteux à la ligne finale de fabrication .Finally, as the connection between the lower berry rail and the dashboard crossmember or the steering column support is performed on the vehicle in progress When assembling separate sub-assemblies, at an already advanced stage of this assembly, it is not normally desirable to use welding devices for fixing the connecting device. Indeed, not only can they cause a significant release of heat that can deteriorate elements of the two subassemblies, but they also require the incorporation of an expensive welding apparatus at the final line of manufacture.
On connaît déjà de nombreux dispositifs de liaison d'une traverse inférieure de baie ou d'un élément analogue à une traverse de planche de bord ou un support de colonne de direction.Many devices are already known for connecting a lower crossbeam or a similar element to a cross dashboard or a steering column support.
La figure 1 représente une partie de la figure 1 du document US-5 452 916 qui représente un dispositif 20 de liaison comprenant quatre branches en forme de cornière reliant des quadrilatères avant et arrière . D ' un côté , le dispositif de liaison comprend des joues qui chevauchent une partie de support de colonne de direction, si bien que ce dispositif de liaison est encombrant et volumineux, et de l'autre côté, il est soudé à la partie formant traverse inférieure de baie .FIG. 1 shows a portion of FIG. 1 of US-5,452,916 which shows a connecting device comprising four angled branches connecting front and rear quadrilaterals. On one side, the connecting device comprises cheeks which overlap a steering column support part, so that this connecting device is bulky and bulky, and on the other side, it is welded to the cross member part. lower bay.
Les figures 2 et 5 , extraites respectivement des documents DE-34 27 211 et US-4 531 760, représentent des dispositifs de liaison placés sensiblement dans un plan ver- tical contenant la colonne de direction et qui sont destinés à se déformer en cas de choc .FIGS. 2 and 5, extracted respectively from documents DE-34 27 211 and US-4 531 760, show connecting devices placed substantially in a vertical plane containing the steering column and which are intended to deform in the event of shock.
La figure 3, extraite du document US-4 627 306, représente un dispositif de liaison essentiellement destiné à former un support auxiliaire de direction qui chevauche la colonne de direction. Grâce à sa forme de tôle simplement pliée, il constitue un support de faible résistance aux chocs frontaux, mais il n'augmente pas sensiblement la raideur des éléments qu ' il relie .Figure 3, extracted from US-4,627,306, shows a connecting device essentially for forming an auxiliary steering support which overlaps the steering column. Due to its simply folded sheet form, it is a support with low resistance to frontal impact, but it does not significantly increase the stiffness of the elements that it connects.
La figure 4, extraite du document DE-19962550, repré- sente un dispositif de liaison en parallélogramme directement monté sur une colonne de direction, dans un plan vertical contenant la direction longitudinale du véhicule. La figure 6, extraite du document US-3 964 578 représente un dispositif de liaison qui n'est pas fixé à une traverse de planche de bord, mais à un support destiné à retenir les genoux du conducteur en cas de choc frontal . Il se trouve donc dans un plan vertical contenant la colonne de direction .Figure 4, taken from DE-19962550, shows a parallelogram connecting device directly mounted on a steering column, in a vertical plane containing the longitudinal direction of the vehicle. Figure 6, extracted from US-3 964 578 shows a connecting device which is not attached to a cross dashboard, but a support for retaining the driver's knees in the event of a frontal impact. It is therefore in a vertical plane containing the steering column.
Enfin, la figure 7, extraite du document FR-2 883 245, représente un dispositif de liaison placé entre une traverse inférieure de baie et un support de colonne de direction et comprenant deux branches non rectilignes placées entre des dispositifs de fixation d'une part à la traverse inférieure de baie et d' autre part au support de colonne de direction . Ce document, qui représente la technique antérieure la plus proche de l'invention, décrit un dispositif qui est symé- trique et qui chevauche la colonne de direction . En particulier, il entoure la colonne de direction et occupe un espace important de chaque côté de celle-ci . Il présente l ' avantage de permettre l ' absorption des chocs frontaux par déformation des deux branches dans une direction transversale à la direction longitudinale du véhicule automobile.Finally, FIG. 7, extracted from the document FR-2 883 245, shows a connecting device placed between a lower berry beam and a steering column support and comprising two non-rectilinear branches placed between fixing devices on the one hand at the lower berry beam and secondly at the steering column support. This document, which represents the closest prior art of the invention, describes a device which is symmetrical and which overlaps the steering column. In particular, it surrounds the steering column and occupies an important space on each side of it. It has the advantage of allowing the absorption of frontal shocks by deformation of the two branches in a direction transverse to the longitudinal direction of the motor vehicle.
L'invention a pour objet un dispositif de liaison qui comporte aussi deux branches, qui est réalisé d'une manière simple et qui n'occupe qu'un très faible espace, notamment parce qu'il n'est placé que d'un seul côté de la colonne de direction.The invention relates to a connecting device which also has two branches, which is made in a simple manner and occupies only a very small space, in particular because it is placed only one side of the steering column.
Plus précisément, l'invention concerne un dispositif de liaison de deux éléments de structure de véhicule automobile, les deux éléments ayant une orientation générale horizontale transversale à la direction longitudinale de dépla- cernent du véhicule automobile et comprenant un premier élément de structure voisin du pare-brise et un second élément de structure comprenant une traverse de planche de bord et un support de colonne de direction, le dispositif de liaison étant du type qui comprend un corps possédant un premier dispositif de fixation du dispositif de liaison au premier élément de structure, un second dispositif de fixation du dispositif de liaison au second élément de structure, et au moins deux branches disposées entre les premier et second dispositifs de fixation et déformables dans la direction transversale sous l'action d'un choc appliqué dans la direction longitudinale du véhicule . Selon l ' invention , le second dispositif de fixation est disposé d'un seul côté de la colonne de direction, et les deux branches du corps ne sont pas symétriques l ' une de l ' autre par rapport à une direction longitudinale .More specifically, the invention relates to a device for connecting two structural elements of a motor vehicle, the two elements having a horizontal general orientation transverse to the longitudinal direction of displacement of the motor vehicle and comprising a first structural element adjacent to the bumper -brise and a second structural element comprising a dashboard crossmember and a steering column support, the connecting device being of the type which comprises a body having a first device for attaching the connecting device to the first structural element, a second attachment device of the connecting device to the second structural element, and at least two branches arranged between the first and second securing devices and deformable in the transverse direction under the action of a shock applied in the longitudinal direction of the vehicle. According to the invention, the second fixing device is arranged on one side of the steering column, and the two branches of the body are not symmetrical to one another with respect to a longitudinal direction.
De préférence, le second dispositif de fixation est plus proche du centre du second élément de structure que la colonne de direction.Preferably, the second fastener is closer to the center of the second structural member than the steering column.
De préférence, chaque branche a une forme en U ouvert entre les deux dispositifs de fixation .Preferably, each branch has an open U-shape between the two fasteners.
De préférence, chaque branche a une section en forme de cornière dont un côté est sensiblement horizontal et l'autre côté forme une joue sensiblement verticale. Le côté sensiblement vertical se prolonge avantageusement par une joue dans l'un au moins des deux dispositifs de fixation.Preferably, each branch has an angle-shaped section whose one side is substantially horizontal and the other side forms a substantially vertical cheek. The substantially vertical side is advantageously extended by a cheek in at least one of the two fasteners.
De préférence, lorsque le dispositif de liaison est monté sur le véhicule automobile, les deux dispositifs de fixation sont décalés par rapport à la direction longitudinale du véhicule .Preferably, when the connecting device is mounted on the motor vehicle, the two fastening devices are offset with respect to the longitudinal direction of the vehicle.
De préférence, l'une des branches a sa plus grande partie sensiblement dans la direction longitudinale du véhicule automobile . De préférence, le premier dispositif de fixation est formé dans une partie du corps qui se trouve dans un plan transversal presque vertical, et le second dispositif de fixation est formé dans une partie du corps qui se trouve dans un plan transversal sensiblement horizontal . Dans un mode de réalisation, le second dispositif de fixation est fixé à un support de colonne de direction.Preferably, one of the branches has its greater part substantially in the longitudinal direction of the motor vehicle. Preferably, the first attachment device is formed in a part of the body which is in an almost vertical transverse plane, and the second attachment device is formed in a part of the body which is in a substantially horizontal transverse plane. In one embodiment, the second attachment device is attached to a steering column support.
Dans un autre mode de réalisation, le second dispositif de fixation est fixé à la traverse de planche de bord.In another embodiment, the second attachment device is attached to the dashboard cross member.
De préférence, l ' un au moins des premier et second dispositifs de fixation est un dispositif de fixation mécanique. Les deux dispositifs de fixation sont avantageusement maintenus par des fixations mécaniques . De préférence, les deux branches au moins du dispositif de liaison sont au nombre de deux.Preferably, at least one of the first and second fasteners is a mechanical fastener. The two fixing devices are advantageously maintained by mechanical fasteners. Preferably, the two branches at least of the connecting device are two in number.
De préférence, le premier élément de structure est une traverse inférieure de baie du véhicule automobile . L'invention concerne aussi un véhicule automobile, comprenant un premier élément de structure constitué d'une traverse inférieure de baie et un second élément de structure comprenant une traverse de planche de bord et un support de colonne de direction, tel que les deux éléments de structure sont reliés par un dispositif de liaison selon 1 ' un des paragraphes précédents .Preferably, the first structural element is a lower rail of the motor vehicle bay. The invention also relates to a motor vehicle, comprising a first structural element consisting of a lower berry beam and a second structural element comprising a dashboard cross member and a steering column support, such as the two elements of structure are connected by a connecting device according to one of the preceding paragraphs.
Un premier avantage du dispositif de liaison selon l'invention est que, grâce à sa forme dissymétrique et à sa résistance mécanique élevée, il assure une liaison robuste entre la traverse inférieure de baie et la traverse de planche de bord ou le support de colonne de direction ; en conséquence, la fréquence de vibration du support de colonne de direction est déplacée vers les fréquences élevées, et le conducteur ne ressent pratiquement pas de vibrations lors- qu'il tient le volant.A first advantage of the connecting device according to the invention is that, thanks to its asymmetrical shape and its high mechanical strength, it provides a robust connection between the lower crossbeam and the dashboard crossbar or the column support. direction ; as a result, the vibration frequency of the steering column support is shifted to high frequencies, and the driver feels virtually no vibration when he is holding the steering wheel.
Un second avantage du dispositif de liaison selon l'invention est que, grâce à la forme dissymétrique des branches, (c'est-à-dire que les deux branches ne sont pas symétriques l ' une de l ' autre dans le dispositif de liaison et, de préférence, chaque branche n'a pas une forme symétrique) , chaque branche peut se déformer latéralement, c'est-à-dire dans la direction transversale du véhicule automobile ; ainsi, lorsqu'un choc frontal est appliqué entre les dispositifs de fixation et la traverse inférieure de baie et à la traverse de planche de bord ou au support de colonne de direction . Le dispositif de fixation constitue donc un dispositif efficace d'amortissement des chocs frontaux.A second advantage of the connecting device according to the invention is that, thanks to the asymmetrical shape of the branches, (that is to say that the two branches are not symmetrical to each other in the connecting device and, preferably, each branch does not have a symmetrical shape), each branch can be deformed laterally, that is to say in the transverse direction of the motor vehicle; thus, when a frontal impact is applied between the fasteners and the lower crossbeam and to the dashboard crossmember or the steering column support. The fixing device is therefore an effective device for damping frontal impacts.
Un troisième avantage du dispositif de liaison selon 1 ' invention est la réduction du volume occupé par le dispositif de liaison, autour de la colonne de direction, par rapport aux dispositifs connus. En effet, le dispositif n'est fixé que d'un côté de la colonne, si bien que l'autre côté est entièrement libre pour le logement de différents dispositifs .A third advantage of the connecting device according to the invention is the reduction of the volume occupied by the connecting device, around the steering column, with respect to known devices. Indeed, the device is fixed only on one side of the column, so that the other side is completely free for housing different devices.
Enfin, un quatrième avantage du dispositif de liaison selon l'invention est que l'un au moins des deux dispositifs de fixation est de type mécanique, par exemple vissé, serti ou riveté, de sorte qu'il n'est pas nécessaire de réaliser un soudage au moment du montage des divers sous-ensembles dans la caisse d'un véhicule automobile.Finally, a fourth advantage of the connecting device according to the invention is that at least one of the two fixing devices is of mechanical type, for example screwed, crimped or riveted, so that it is not necessary to achieve a welding at the time of assembly of the various subassemblies in the body of a motor vehicle.
D ' autres caractéristiques et avantages de l ' invention ressortiront mieux de la description qui va suivre, faite en référence aux dessins annexés sur lesquels, les figures 1 à 7, illustrant des dispositifs de la technique antérieure, ayant déjà été décrites : la figure 8 est une vue en plan d'une partie de la structure de véhicule automobile comprenant un sous-ensemble de traverse de planche de bord muni d'un support de colonne de direction, avec en outre une colonne de direction et un volant, et avec un dispositif de liaison selon l'invention, cette figure indiquant la position du dispositif de liaison dans un véhicule ; et les figures 9 à 14 sont diverses vues en perspective du dispositif de liaison représenté sur la figure 8.Other features and advantages of the invention will become more apparent from the following description, given with reference to the accompanying drawings, in which, FIGS. 1 to 7, illustrating devices of the prior art, having already been described: FIG. is a plan view of a portion of the motor vehicle structure comprising a dashboard transom subassembly provided with a steering column support, with a steering column and a steering wheel, and a steering column connecting device according to the invention, this figure indicating the position of the connecting device in a vehicle; and Figures 9 to 14 are various perspective views of the connecting device shown in Figure 8.
La figure 8 représente un sous-ensemble comprenant une traverse de planche de bord 10, ayant une partie relative- ment mince 12 , se terminant par un dispositif de fixation 14 et munie de renforts ou jambes de force 15, et une partie relativement large 16, se terminant par un dispositif de fixation 18 et portant un support de colonne de direction 20. Les dispositifs de fixation 14 et 18 sont destinés à être fixés à la caisse d'un véhicule automobile, et les renforts 15 au tunnel du plancher du véhicule. Le support 20 de colonne de direction supporte la colonne de direction 22 qui se termine, du côté du conducteur, par un volant 24.FIG. 8 shows a subassembly comprising a dashboard cross member 10, having a relatively thin portion 12, ending in a fastener 14 and provided with reinforcements or struts 15, and a relatively wide portion 16 , ending in a fastening device 18 and carrying a steering column support 20. The fixing devices 14 and 18 are intended to be fixed to the body of a motor vehicle, and the reinforcements 15 to the tunnel of the floor of the vehicle . The steering column support 20 supports the steering column 22 which terminates on the driver's side with a steering wheel 24.
Un dispositif de liaison 26 selon l'invention, destiné à être fixé par un premier dispositif de fixation 30 à une traverse inférieure de baie (non représentée) , est fixé par un second dispositif de fixation 28 au support 20 de colonne de direction (ou éventuellement à la partie 16 de la traverse de planche de bord) .A connecting device 26 according to the invention, intended to be fixed by a first fixing device 30 to a lower crossbeam (not shown), is fixed by a second fixing device 28 to the column support 20 direction (or possibly at part 16 of the dashboard crossbar).
Les figures 9 à 14 sont des vues en perspective du dispositif de liaison 26 dont la forme est très élaborée. Comme l'indique la figure 9, le corps du dispositif de liaison comprend, entre le premier dispositif de fixation 28 et le second 30 , deux branches 32 , 34. La branche 32 a une forme en U ouvert dont un côté est orienté pratiquement dans la direction longitudinale du véhicule automobile alors que 1 ' autre côté du U ouvert est largement incliné par rapport à cette direction longitudinale. La branche 34 a une forme en U ouvert plus arrondie que celle de la branche 32.Figures 9 to 14 are perspective views of the connecting device 26 whose shape is very elaborate. As shown in Figure 9, the body of the connecting device comprises, between the first fastening device 28 and the second 30, two branches 32, 34. The branch 32 has an open U-shape, one side of which is oriented substantially in the longitudinal direction of the motor vehicle while the other side of the open U is widely inclined relative to this longitudinal direction. The branch 34 has an open U shape more rounded than that of the branch 32.
Le second dispositif de fixation 28 est pratiquement dans un plan horizontal, alors que le premier dispositif de fixation 30 est approximativement dans un plan vertical .The second fastener 28 is substantially in a horizontal plane, while the first fastener 30 is approximately in a vertical plane.
Chacune des deux branches 32 , 34 a une forme de cornière dont un côté se trouve pratiquement dans le plan horizontal principal du corps et dont l ' autre côté forme une joue sensiblement verticale 40, 42. On note sur les figures 10 et 13 que le corps, entre les deux dispositifs de fixation 28 et 30, a une forme gauchie par rapport à un plan horizontal.Each of the two branches 32, 34 has an angle shape whose one side is practically in the main horizontal plane of the body and the other side forms a substantially vertical cheek 40, 42. It is noted in Figures 10 and 13 that the body, between the two fasteners 28 and 30, has a shape warped with respect to a horizontal plane.
Dans le mode de réalisation représenté, les deux dispositifs de fixation 28, 30 coopèrent avec l'élément de structure correspondant par une fixation mécanique, par exemple par un boulon passant dans un orifice respectif 36, 38.In the embodiment shown, the two fasteners 28, 30 cooperate with the corresponding structural element by a mechanical fastening, for example by a bolt passing through a respective orifice 36, 38.
De préférence, la joue verticale 40, 42 de chaque branche se prolonge dans l'un au moins des deux dispositifs de fixation 28, 30, et de préférence dans les deux comme représenté (voir notamment figures 11 et 12) . La figure 13 représente ainsi une partie de joue 44 qui augmente la résistance mécanique de la partie de fixation 30.Preferably, the vertical flange 40, 42 of each branch is extended in at least one of the two fasteners 28, 30, and preferably in both as shown (see in particular Figures 11 and 12). FIG. 13 thus represents a cheek portion 44 which increases the mechanical strength of the fixing portion 30.
La figure 9 indique que les deux branches 32, 34 forment entre elles une cavité en forme de poire dont la longueur 46 est destinée à diminuer fortement en cas de choc frontal . Un choc frontal dans la direction longitudinale du véhicule automobile associé est appliqué pratiquement dans la direction de la partie principale de la branche 32 (figure 9) . Grâce à la forme en U de chacune des branches 32, 34 et au gauchissement des branches (voir figure 10), celles-ci se déforment facilement en cas de choc frontal suffisant, bien qu'elles aient une grande raideur grâce à leur forme de cornière .Figure 9 indicates that the two branches 32, 34 form between them a pear-shaped cavity whose length 46 is intended to greatly reduce in the event of a frontal impact. A frontal impact in the longitudinal direction of the associated motor vehicle is practically applied in the direction of the main part of the branch 32 (Figure 9). Thanks to the U-shape of each of the branches 32, 34 and the warping of the branches (see Figure 10), these easily deform in case of frontal impact sufficient, although they have a great stiffness thanks to their shape of angle iron.
La surface étendue de la partie de fixation 30 permet la formation d'une surface importante de coopération avec la traverse inférieure de baie qui donne une bonne rigidité en direction verticale.The extended surface of the attachment portion 30 allows for the formation of a large area of cooperation with the lower berry beam which gives good rigidity in a vertical direction.
Grâce à la présence des joues 40, 42 et de la partie de fixation étendue 30 qui sont orientées verticalement, la raideur de la traverse de planche de bord est largement accrue en direction verticale, si bien que le premier mode de vibration de la colonne de direction est largement décalé vers des fréquences élevées. Cependant, grâce à la forme en U et à la dissymétrie du dispositif de liaison, les conditions fixées pour la résistance aux chocs en cas de collision frontale sont facilement remplies , de sorte que l'intrusion du tablier dans l'habitacle n'affecte guère la traverse de planche de bord.Thanks to the presence of the cheeks 40, 42 and the extended attachment portion 30 which are oriented vertically, the stiffness of the dashboard crossbar is greatly increased in the vertical direction, so that the first mode of vibration of the column of direction is largely shifted to high frequencies. However, thanks to the U-shape and dissymmetry of the connecting device, the conditions set for impact resistance in the event of a frontal collision are easily met, so that the intrusion of the deck into the passenger compartment hardly affects the dashboard crossbar.
Une caractéristique très importante, qui apparaît clairement par la comparaison du dispositif de liaison selon 1 ' invention aux dispositifs de liaison représentés sur les figures 1 à 7 de la technique antérieure, est que, bien que les conditions d'amortissement des vibrations et d'amortissement des chocs frontaux soient remplies , l ' encombrement du dispositif de liaison est extrêmement réduit. Enfin, grâce à la fixation mécanique, le montage est aisé lors de la construction du véhicule et le démontage est possible. A very important feature, which is clearly apparent from the comparison of the connecting device according to the invention to the connecting devices shown in FIGS. 1 to 7 of the prior art, is that, although the vibration damping conditions and the frontal damping are satisfied, the size of the connecting device is extremely small. Finally, thanks to the mechanical fixing, the assembly is easy during the construction of the vehicle and disassembly is possible.

Claims

REVENDICATIONS
1. Dispositif de liaison de deux éléments de structure de véhicule automobile, les deux éléments ayant une orientation générale horizontale transversale à la direction longitudinale de déplacement du véhicule automobile et comprenant un premier élément de structure voisin du pare- brise et un second élément de structure comprenant une traverse de planche de bord (10) et un support de colonne de direction (20) , le dispositif de liaison étant du type qui comprend un corps possédant un premier dispositif de fixation (30) du dispositif de liaison au premier élément de structure, un second dispositif de fixation (28) du dispositif de liaison au second élément de structure, et au moins deux branches (32, 34) disposées entre les premier et second dispositifs de fixation (28, 30) et déformables dans la direction transversale sous l'action d'un choc appliqué dans la direction longitudinale du véhicule, caractérisé en ce que le second dispositif de fixation (28) est disposé d'un seul côté de la colonne de direction, et les deux branches (32, 34) du corps ne sont pas symétriques l'une de l'autre par rapport à une direction longitudinale .1. Device for connecting two motor vehicle structure elements, the two elements having a general horizontal orientation transverse to the longitudinal direction of movement of the motor vehicle and comprising a first structural element adjacent to the windshield and a second structural element comprising a dashboard cross member (10) and a steering column support (20), the connecting device being of the type which comprises a body having a first attachment device (30) of the connecting device to the first structural member a second fastening device (28) of the connecting device to the second structural element, and at least two branches (32, 34) arranged between the first and second fixing devices (28, 30) and deformable in the transverse direction under the action of a shock applied in the longitudinal direction of the vehicle, characterized in that the second fastening device (28) is sposed on one side of the steering column, and the two branches (32, 34) of the body are not symmetrical to each other with respect to a longitudinal direction.
2. Dispositif de liaison selon la revendication 1 , caractérisé en ce que le second dispositif de fixation (28) est plus proche du centre du second élément de structure que la colonne de direction.2. Connecting device according to claim 1, characterized in that the second fastening device (28) is closer to the center of the second structural element than the steering column.
3. Dispositif de liaison selon l'une des revendications 1 et 2, caractérisé en ce que chaque branche (32, 34) a une forme en U ouvert entre les deux dispositifs de fixation (28, 30) .3. Connecting device according to one of claims 1 and 2, characterized in that each branch (32, 34) has an open U-shape between the two fasteners (28, 30).
4. Dispositif de liaison selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque branche (32, 34) a une section en forme de cornière dont un côté est sensiblement horizontal et l ' autre côté forme une joue (40, 42) sensiblement verticale.4. Connecting device according to any one of the preceding claims, characterized in that each leg (32, 34) has an angle-shaped section of which one side is substantially horizontal and the other side forms a cheek (40, 42 ) substantially vertical.
5. Dispositif de liaison selon la revendication 4 , caractérisé en ce que le côté sensiblement vertical se prolonge par une joue (44) dans l'un au moins des deux dispositifs de fixation.Connecting device according to claim 4, characterized in that the substantially vertical side extended by a cheek (44) in at least one of the two fasteners.
6. Dispositif de liaison selon l'une quelconque des revendications précédentes, caractérisé en ce que, lorsque le dispositif de liaison est monté sur le véhicule automobile, les deux dispositifs de fixation (28, 30) sont décalés par rapport à la direction longitudinale .6. Connecting device according to any one of the preceding claims, characterized in that, when the connecting device is mounted on the motor vehicle, the two fasteners (28, 30) are offset with respect to the longitudinal direction.
7. Dispositif de liaison selon l ' une quelconque des revendications précédentes, caractérisé en ce que le premier dispositif de fixation (30) est formé dans une partie du corps qui se trouve dans un plan transversal presque vertical, et le second dispositif de fixation (28) est formé dans une partie du corps qui se trouve dans un plan transversal sensiblement horizontal . Connecting device according to one of the preceding claims, characterized in that the first fastening device (30) is formed in a part of the body which is in an almost vertical transverse plane, and the second fastening device ( 28) is formed in a part of the body which is in a substantially horizontal transverse plane.
8. Dispositif de liaison selon l'une quelconque des revendications précédentes, caractérisé en ce que l'un au moins des premier et second dispositifs de fixation (28, 30) est un dispositif de fixation mécanique.8. Connecting device according to any one of the preceding claims, characterized in that at least one of the first and second fastening devices (28, 30) is a mechanical fastening device.
9. Dispositif de liaison selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier élément de structure est une traverse inférieure de baie du véhicule automobile .9. Connecting device according to any one of the preceding claims, characterized in that the first structural element is a lower cross member of the motor vehicle bay.
10. Véhicule automobile, comprenant un premier élément de structure constitué d'une traverse inférieure de baie et un second élément de structure comprenant une traverse de planche de bord (10) et un support de colonne de directionA motor vehicle, comprising a first structural element consisting of a lower berry beam and a second structural element comprising a dashboard cross member (10) and a steering column support
(20) , caractérisé en ce que les deux éléments de structure sont reliés par un dispositif de liaison (26) selon l'une quelconque des revendications précédentes . (20), characterized in that the two structural elements are connected by a connecting device (26) according to any one of the preceding claims.
PCT/FR2007/002043 2007-01-24 2007-12-12 Device for connecting two structural members of an automotive vehicle WO2008090274A1 (en)

Applications Claiming Priority (2)

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FR0700479A FR2911572B1 (en) 2007-01-24 2007-01-24 DEVICE FOR CONNECTING TWO ELEMENTS OF STRUCTURE OF A MOTOR VEHICLE.
FR0700479 2007-01-24

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WO2008090274A1 true WO2008090274A1 (en) 2008-07-31

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DE102010020497B4 (en) * 2010-05-14 2020-08-06 Audi Ag Sheet metal component with a mounting bracket for an attachment
CN102730045A (en) * 2011-04-14 2012-10-17 漳州市昌龙汽车附件有限公司 Steering gear box support
FR3029490B1 (en) * 2014-12-03 2018-03-23 Renault S.A.S. STRUCTURAL ELEMENT OF THE FRONT PART OF A VEHICLE
CN106184408B (en) * 2015-05-05 2020-03-27 标致·雪铁龙汽车公司 CCB support with collapsing function
CN108082268B (en) * 2017-12-15 2020-01-14 重庆长安汽车股份有限公司 Automobile steering support pipe beam

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US5564769A (en) * 1994-12-19 1996-10-15 Chrysler Corporations Reinforced instrument panel assembly
FR2883245A1 (en) * 2005-03-21 2006-09-22 Faurecia Interieur Ind Snc Steering column bracket and lower bay crosspiece connecting device for use in motor vehicle, has bent rods deformed under effect of frontal impact along two different directions perpendicular to longitudinal direction of vehicle
FR2887214A1 (en) * 2005-06-21 2006-12-22 Peugeot Citroen Automobiles Sa Steering column rigidifying connection tab for motor vehicle, has damping unit interposed between two coaxial shanks, where damping unit is plate realized in viscoelastic material

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US5564769A (en) * 1994-12-19 1996-10-15 Chrysler Corporations Reinforced instrument panel assembly
FR2883245A1 (en) * 2005-03-21 2006-09-22 Faurecia Interieur Ind Snc Steering column bracket and lower bay crosspiece connecting device for use in motor vehicle, has bent rods deformed under effect of frontal impact along two different directions perpendicular to longitudinal direction of vehicle
FR2887214A1 (en) * 2005-06-21 2006-12-22 Peugeot Citroen Automobiles Sa Steering column rigidifying connection tab for motor vehicle, has damping unit interposed between two coaxial shanks, where damping unit is plate realized in viscoelastic material

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