WO2010125269A1 - Twist-beam axle - Google Patents

Twist-beam axle Download PDF

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Publication number
WO2010125269A1
WO2010125269A1 PCT/FR2010/050671 FR2010050671W WO2010125269A1 WO 2010125269 A1 WO2010125269 A1 WO 2010125269A1 FR 2010050671 W FR2010050671 W FR 2010050671W WO 2010125269 A1 WO2010125269 A1 WO 2010125269A1
Authority
WO
WIPO (PCT)
Prior art keywords
train
arms
arm
cross member
motor vehicle
Prior art date
Application number
PCT/FR2010/050671
Other languages
French (fr)
Inventor
Bernard Criqui
Samuel Fays
Original Assignee
Renault S.A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault S.A.S. filed Critical Renault S.A.S.
Priority to EP10723221A priority Critical patent/EP2424741A1/en
Publication of WO2010125269A1 publication Critical patent/WO2010125269A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/20—Semi-rigid axle suspensions
    • B60G2200/21—Trailing arms connected by a torsional beam, i.e. twist-beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/20—Semi-rigid axle suspensions
    • B60G2200/22—Trailing arms connected by a straight torsion bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/13—Torsion spring
    • B60G2202/134—Torsion spring comprising a transversal torsion bar and/or tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/13—Torsion spring
    • B60G2202/136—Twist-beam type arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/122—Mounting of torsion springs
    • B60G2204/1226—Mounting of torsion springs on the trailing arms of a twist beam type arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/41—Elastic mounts, e.g. bushings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • B60G2206/202—Constructional features of semi-rigid axles, e.g. twist beam type axles with a radially deformed tube as a cross member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • B60G2206/203—Constructional features of semi-rigid axles, e.g. twist beam type axles with outwardly bent trailing arms to increase the width of the support or wheelbase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/71—Light weight materials
    • B60G2206/7102—Aluminium alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/72—Steel
    • B60G2206/724—Wires, bars or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/73—Rubber; Elastomers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/82—Joining
    • B60G2206/821—Joining by gluing

Definitions

  • the invention relates to a motor vehicle train, particularly in a motor vehicle rear end, the train being provided with a cross member having a high flexural stiffness and moderate torsional stiffness. It also relates to a motor vehicle comprising such a train.
  • Many motor vehicles are equipped with a rear axle comprising two longitudinal arms for supporting wheel flares, and which are interconnected by a cross member.
  • Such a cross is dimensioned to be very rigid in flexion. It contributes to the rigorous maintenance of the wheel when the suspension arm is itself biased in bending in a plane that contains the wheel arm and the cross member. Such stresses are due to the transverse adhesion of the tire on the road and can become very important during cornering negotiated at high speed.
  • the crosspiece helps to prevent steering of the wheel, or at least helps to control the steering of the wheel, so that it remains within acceptable limits, or so that it is controlled and not suffered.
  • the crossbar often has a very high torsional stiffness.
  • Cross beams formed from two half-tubular crosspieces and elastomeric coupling pieces are also known. This type of sleepers requires a large number of rooms and is of complex manufacture.
  • FIG. 1 A motor vehicle train equipped with such a cross member is illustrated in FIG.
  • the train 1 comprises two longitudinal arms 2 connected by a torsion cross 3.
  • the arms 2 are generally made of cast aluminum and each comprise various functions, such as a wheel support, a suspension support, or a joint on the vehicle .
  • the arms 2 are secured to the cross member 3 with the aid of a structural adhesive causing a rigid connection between the arms 2 and the cross member 3.
  • the crossbar 3 is made of high tensile strength steel. It is made by stamping a sheet on a press in several passes so as to obtain the desired section and thickness. It has an open section over its entire length, the shape and dimensions of this open section varying between the ends of the cross member 3 so as to impart the desired properties of stiffness and bending.
  • Figure 2 is a detail view of the cross member 3 which illustrates the V-shaped profile of the cross member 3 near its middle.
  • Such a train is complex and expensive to manufacture.
  • the distortion of the crossbar due to heat treatment involves absorbing defects in the assembly areas by tolerating variations in adhesive thickness. This can limit the mechanical performance of the bonding and prevent obtaining a geometry conform directly after assembly and is industrially robust.
  • the object of the invention is to remedy these drawbacks.
  • the invention provides a motor vehicle train requiring a reduced number of parts, simple and economical manufacturing, and whose cross member has a high flexural stiffness and a moderate torsional stiffness.
  • the invention thus relates to a motor vehicle train comprising two longitudinal suspension arms and an elongated cross member inserted at each of its ends in one of the arms.
  • a connecting material is disposed between the crossmember and each arm, so as to secure the crossmember of the two arms.
  • the connecting material further allows a rotation of each arm about the longitudinal axis of the cross member in operational configuration of the train.
  • the cross member can provide an anti-roll function.
  • the bonding material is preferably disposed over the entire contact surface of the sleeper with each arm.
  • the bonding material may be an elastomeric adhesive material.
  • the crossmember advantageously comprises a steel of elastic limit greater than or equal to 400 MPa.
  • An elastic member may be disposed between the cross member and each arm.
  • the invention also relates to a motor vehicle comprising a train described above, in particular a rear train of the vehicle.
  • FIG. 1, already described, illustrates in perspective a motor vehicle train of the state of the art
  • FIG. 2, already described, is a detailed perspective view of the train of FIG. 1, and
  • FIG. 3 illustrates in perspective a motor vehicle train according to the invention.
  • the train 1 of a motor vehicle as illustrated in FIG. 3, on which elements identical to those of FIGS. 1 and 2 bear the same references, comprises two arms 2 connected by a cross member 3.
  • Each arm 2 comprises a cylindrical heel 4 of axis substantially perpendicular to the axis of the arms 2, for the assembly of the arm 2 with one end of the crossbar 3.
  • There is then an elastomeric adhesive on each end of the crossbar 3 The adhesive is preferably disposed over the entire contact surface of the crosspiece 3 with each arm 2, so as to facilitate the rotation of the arm 3 around the crossbar 2.
  • a glue based on epoxy resin is preferably used, such as, for example, the glue sold under the name Araldite® by the company Bostik, or else a glue based on neoprene® (a compound based on polychloroprene sold by the company DuPont Chemicals). or a polyurethane glue.
  • the glue can be loaded with rubber particles.
  • the crosspiece 3 is tubular and is inserted at each of its ends in the heels 4, which constitute a cylindrical portion of the arms 2.
  • the specific choice of the glue allows a rotation of the arm 2 about the axis of the cross member 3, in operational configuration of the train 1, when the glue has dried or crosslinked. In this way, it can thus ensure flexibility of the crosspiece 3 in torsion.
  • Elastomer glue thus allows the assembly of the arms 2 on the crossbar 3. It also allows to give the cross 3 anti-roll function.
  • the cross member 3 and the arms 2 are advantageously made of non-metallurgically weldable materials.
  • the cross member 3 is preferably high tensile steel and the arms 2 are cast aluminum. High-performance materials with respect to their specific functionality are thus used. Steel is the most resistant material to give the sleeper 3 its elastic function while supporting fatigue, torsion, flexion and tensile stresses, while the molded aluminum of the arms 2 makes it possible to produce highly worked shapes incorporating all the functions of wheel support, suspension spring, pivot and attachment of the longitudinal arms 2. A performing and lightened train is thus obtained. It should be noted that any type of steel may be used for the cross member 3, and that the arms 2 may also comprise steel.
  • a ring of elastic material such as for example rubber
  • glue is applied on the inner face and on the outer face of the ring, then we put the ring on the crossbar 3, then the arm 2 on the ring.
  • the cross member 3 may be provided with ribs and the arm 2 may comprise chamfers.
  • a sealing material can be disposed at the ends of the arms 2, which makes it possible to prevent the passage of water between the arms 2 and the cross-member 3.
  • the lack of heat treatment of the cross member 3 limits its geometric distortions.
  • the train 1 obtained makes it possible to easily ensure the parallelism of the wheels as well as the camber of the wheels.
  • the number of pieces is reduced and the geometry of the train 1 is reproducible, which makes it possible to mount the train 1 directly after assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Springs (AREA)

Abstract

The invention relates to an axle system (1) for an automobile including two longitudinal control arms (2) and one elongate crossbeam (3) with each one of the two ends thereof inserted into one of the arms (2), characterised in that a binding material is arranged between the crossbeam (3) and each arm (2) so as to secure the crossbeam (3) to the two arms (2), and in that the binding material enables each arm (2) to rotate about the longitudinal axis of the crossbeam (3) in the operational configuration of the axle system (1).

Description

ESSIEU DE TORSION TORSION AXLE
L'invention a pour objet un train de véhicule automobile, en particulier en train arrière de véhicule automobile, le train étant muni d'une traverse possédant une raideur en flexion élevée et une raideur en torsion modérée. Elle a également pour objet un véhicule automobile comprenant un tel train.The invention relates to a motor vehicle train, particularly in a motor vehicle rear end, the train being provided with a cross member having a high flexural stiffness and moderate torsional stiffness. It also relates to a motor vehicle comprising such a train.
De nombreux véhicules automobiles sont équipés d'un essieu arrière comprenant deux bras longitudinaux destinés à supporter des fusées des roues, et qui sont reliés entre eux par une traverse.Many motor vehicles are equipped with a rear axle comprising two longitudinal arms for supporting wheel flares, and which are interconnected by a cross member.
Une telle traverse est dimensionnée pour être très rigide en flexion. Elle participe au maintien rigoureux de la roue lorsque le bras de suspension est lui-même sollicité en flexion dans un plan qui contient le bras de roue et la traverse. De telles sollicitations sont dues à l'adhérence transversale du pneumatique sur la chaussée et peuvent devenir très importantes lors de virages négociés à vive allure. Autrement dit, la traverse contribue à empêcher le braquage de la roue, ou du moins contribue à contrôler le braquage de la roue, pour qu'il reste dans des limites acceptables, ou pour qu'il soit contrôlé et non subi. Dans ce cas, la traverse présente souvent une raideur propre en torsion très élevée.Such a cross is dimensioned to be very rigid in flexion. It contributes to the rigorous maintenance of the wheel when the suspension arm is itself biased in bending in a plane that contains the wheel arm and the cross member. Such stresses are due to the transverse adhesion of the tire on the road and can become very important during cornering negotiated at high speed. In other words, the crosspiece helps to prevent steering of the wheel, or at least helps to control the steering of the wheel, so that it remains within acceptable limits, or so that it is controlled and not suffered. In this case, the crossbar often has a very high torsional stiffness.
On a donc cherché à rendre une telle traverse moins raide en torsion, en particulier pour s'affranchir de la présence d'une barre antiroulis. II est ainsi connu de préparer des traverses roulées-soudées pour former un tube ajouré. Bien que ce type de traverse soit économique à fabriquer, il a pour inconvénient de présenter une mauvaise qualité de géométrie.It has therefore sought to make such a cross stiffer less torsion, especially to overcome the presence of an anti-roll bar. It is thus known to prepare rolled-welded crosspieces to form a perforated tube. Although this type of cross is economical to manufacture, it has the disadvantage of having a poor quality of geometry.
On connaît également des traverses formées de deux demi- traverses tubulaires et de pièces d'accouplement en élastomère. Ce type de traverses nécessite un nombre de pièce important et est de fabrication complexe.Cross beams formed from two half-tubular crosspieces and elastomeric coupling pieces are also known. This type of sleepers requires a large number of rooms and is of complex manufacture.
Il est également connu d'utiliser des traverses formées par grenaillage et emboutissage d'un tube en acier à chaud puis par trempe de l'acier dans l'huile.It is also known to use sleepers formed by shot blasting and stamping a hot-rolled steel tube and then quenching the steel in the oil.
Un train de véhicule automobile muni d'une telle traverse est illustré à la figure 1.A motor vehicle train equipped with such a cross member is illustrated in FIG.
Le train 1 comprend deux bras longitudinaux 2 reliés par une traverse torsible 3. Les bras 2 sont généralement réalisés en aluminium moulé et comportent chacun diverses fonctions, telles qu'un support de roue, un support de suspension, ou encore une articulation sur le véhicule.The train 1 comprises two longitudinal arms 2 connected by a torsion cross 3. The arms 2 are generally made of cast aluminum and each comprise various functions, such as a wheel support, a suspension support, or a joint on the vehicle .
Les bras 2 sont solidarisés à la traverse 3 à l'aide d'une colle structurale provoquant une liaison rigide entre les bras 2 et la traverse 3.The arms 2 are secured to the cross member 3 with the aid of a structural adhesive causing a rigid connection between the arms 2 and the cross member 3.
La traverse 3 est en acier à haute résistance élastique. Elle est réalisée par emboutissage d'une tôle sur une presse en plusieurs passages de manière à obtenir la section et l'épaisseur souhaitées. Elle présente une section ouverte sur toute sa longueur, la forme et les dimensions de cette section ouverte variant entre les extrémités de la traverse 3 de manière à lui conférer les propriétés de raideur et de flexion voulues.The crossbar 3 is made of high tensile strength steel. It is made by stamping a sheet on a press in several passes so as to obtain the desired section and thickness. It has an open section over its entire length, the shape and dimensions of this open section varying between the ends of the cross member 3 so as to impart the desired properties of stiffness and bending.
La figure 2 est une vue de détail de la traverse 3 qui illustre le profil en V de la traverse 3 à proximité de son milieu. Un tel train est de fabrication complexe et onéreuse. En outre, la distorsion de la traverse due au traitement thermique implique d'absorber les défauts au niveau des zones d'assemblage en tolérant des variations d'épaisseur de colle. Ceci peut limiter les performances mécaniques du collage et empêcher l'obtention d'une géométrie conforme directement après assemblage et qui soit industriellement robuste.Figure 2 is a detail view of the cross member 3 which illustrates the V-shaped profile of the cross member 3 near its middle. Such a train is complex and expensive to manufacture. In addition, the distortion of the crossbar due to heat treatment involves absorbing defects in the assembly areas by tolerating variations in adhesive thickness. This can limit the mechanical performance of the bonding and prevent obtaining a geometry conform directly after assembly and is industrially robust.
L'invention a pour objectif de remédier à ces inconvénients.The object of the invention is to remedy these drawbacks.
En particulier, l'invention propose un train de véhicule automobile nécessitant un nombre de pièces réduit, de fabrication simple et économique, et dont la traverse possède une raideur en flexion élevée et une raideur en torsion modérée.In particular, the invention provides a motor vehicle train requiring a reduced number of parts, simple and economical manufacturing, and whose cross member has a high flexural stiffness and a moderate torsional stiffness.
L'invention a ainsi pour objet un train de véhicule automobile comprenant deux bras longitudinaux de suspension et une traverse de forme allongée insérée à chacune de ses extrémités dans un des bras.The invention thus relates to a motor vehicle train comprising two longitudinal suspension arms and an elongated cross member inserted at each of its ends in one of the arms.
Conformément à l'invention, un matériau de liaison est disposé entre la traverse et chaque bras, de manière à solidariser la traverse des deux bras. Le matériau de liaison permet en outre une rotation de chaque bras autour de l'axe longitudinal de la traverse en configuration opérationnelle du train.According to the invention, a connecting material is disposed between the crossmember and each arm, so as to secure the crossmember of the two arms. The connecting material further allows a rotation of each arm about the longitudinal axis of the cross member in operational configuration of the train.
Ainsi, grâce à l'emploi du matériau de liaison spécifique, la traverse peut assurer une fonction anti-roulis.Thus, thanks to the use of the specific bonding material, the cross member can provide an anti-roll function.
Le matériau de liaison est de préférence disposé sur l'ensemble de la surface de contact de la traverse avec chaque bras. Le matériau de liaison peut être un matériau adhésif à base d'élastomère.The bonding material is preferably disposed over the entire contact surface of the sleeper with each arm. The bonding material may be an elastomeric adhesive material.
La traverse comprend avantageusement un acier de limite élastique supérieure ou égale à 400 MPa.The crossmember advantageously comprises a steel of elastic limit greater than or equal to 400 MPa.
Un élément élastique peut être disposé entre la traverse et chaque bras.An elastic member may be disposed between the cross member and each arm.
L'invention a également pour objet un véhicule automobile comprenant un train décrit ci-dessus, en particulier un train arrière du véhicule.The invention also relates to a motor vehicle comprising a train described above, in particular a rear train of the vehicle.
D'autres caractéristiques et avantages de la présente invention apparaîtront plus clairement à la lecture de la description suivante donnée à titre d'exemple illustratif et non limitatif et faite en référence aux dessins annexés sur lesquels :Other features and advantages of the present invention will appear more clearly on reading the following description. given by way of illustrative and non-limiting example and with reference to the appended drawings in which:
- la figure 1, déjà décrite, illustre en perspective un train de véhicule automobile de l'état de la technique, - la figure 2, déjà décrite, est une vue de détail en perspective du train de la figure 1, etFIG. 1, already described, illustrates in perspective a motor vehicle train of the state of the art; FIG. 2, already described, is a detailed perspective view of the train of FIG. 1, and
- la figure 3 illustre en perspective un train de véhicule automobile selon l'invention.- Figure 3 illustrates in perspective a motor vehicle train according to the invention.
Le train 1 de véhicule automobile, tel qu'illustré à la figure 3, sur laquelle les éléments identiques à ceux des figures 1 et 2 portent les mêmes références, comporte deux bras 2 reliés par une traverse 3.The train 1 of a motor vehicle, as illustrated in FIG. 3, on which elements identical to those of FIGS. 1 and 2 bear the same references, comprises two arms 2 connected by a cross member 3.
Chaque bras 2 comporte un talon cylindrique 4 d'axe sensiblement perpendiculaire à l'axe des bras 2, pour l'assemblage du bras 2 avec une extrémité de la traverse 3. On dispose alors une colle élastomère sur chacune des extrémités de la traverse 3. La colle est de préférence disposée sur l'ensemble de la surface de contact de la traverse 3 avec chaque bras 2, de manière à faciliter la rotation du bras 3 autour de la traverse 2.Each arm 2 comprises a cylindrical heel 4 of axis substantially perpendicular to the axis of the arms 2, for the assembly of the arm 2 with one end of the crossbar 3. There is then an elastomeric adhesive on each end of the crossbar 3 The adhesive is preferably disposed over the entire contact surface of the crosspiece 3 with each arm 2, so as to facilitate the rotation of the arm 3 around the crossbar 2.
On utilise de préférence une colle à base de résine epoxy, comme par exemple la colle commercialisée sous la dénomination Araldite® par la société Bostik, ou encore une colle à base de néoprène® (composé à base de polychloroprène commercialisé par la société DuPont Chemicals) ou une colle à base de polyuréthanne. La colle peut être chargée de particules de caoutchouc. La traverse 3 est tubulaire et est insérée à chacune de ses extrémités dans les talons 4, qui constituent une portion cylindrique des bras 2. Le choix spécifique de la colle permet une rotation du bras 2 autour de l'axe de la traverse 3, en configuration opérationnelle du train 1, lorsque la colle a séché ou réticulé. De cette façon, on peut ainsi assurer une souplesse de la traverse 3 en torsion. La colle élastomère permet ainsi l'assemblage des bras 2 sur la traverse 3. Elle permet également de conférer à la traverse 3 une fonction anti-roulis.A glue based on epoxy resin is preferably used, such as, for example, the glue sold under the name Araldite® by the company Bostik, or else a glue based on neoprene® (a compound based on polychloroprene sold by the company DuPont Chemicals). or a polyurethane glue. The glue can be loaded with rubber particles. The crosspiece 3 is tubular and is inserted at each of its ends in the heels 4, which constitute a cylindrical portion of the arms 2. The specific choice of the glue allows a rotation of the arm 2 about the axis of the cross member 3, in operational configuration of the train 1, when the glue has dried or crosslinked. In this way, it can thus ensure flexibility of the crosspiece 3 in torsion. Elastomer glue thus allows the assembly of the arms 2 on the crossbar 3. It also allows to give the cross 3 anti-roll function.
La traverse 3 et les bras 2 sont avantageusement en des matériaux non métallurgiquement soudables. La traverse 3 est de préférence en acier à haute limite élastique et les bras 2 sont en aluminium moulé. Des matériaux performants vis-à-vis de leur fonctionnalité spécifique sont ainsi utilisés. L'acier est le matériau le plus résistant pour conférer à la traverse 3 sa fonction élastique tout en supportant des sollicitations en fatigue, torsion, flexion et traction, tandis que l'aluminium moulé des bras 2 permet de réaliser des formes très ouvragées intégrant toutes les fonctions de support de roue, de ressort de suspension, de pivot et d'attache des bras longitudinaux 2. Un train performant et allégé est ainsi obtenu. Il est à noter qu'on peut utiliser tout type d'acier pour la traverse 3, et que les bras 2 peuvent également comprendre de l'acier.The cross member 3 and the arms 2 are advantageously made of non-metallurgically weldable materials. The cross member 3 is preferably high tensile steel and the arms 2 are cast aluminum. High-performance materials with respect to their specific functionality are thus used. Steel is the most resistant material to give the sleeper 3 its elastic function while supporting fatigue, torsion, flexion and tensile stresses, while the molded aluminum of the arms 2 makes it possible to produce highly worked shapes incorporating all the functions of wheel support, suspension spring, pivot and attachment of the longitudinal arms 2. A performing and lightened train is thus obtained. It should be noted that any type of steel may be used for the cross member 3, and that the arms 2 may also comprise steel.
Pour obtenir une raideur axiale suffisamment élevée, on peut disposer une bague en matériau élastique, comme par exemple du caoutchouc, entre la traverse 3 et chaque bras 2. Pour ce faire, on applique de la colle sur la face intérieure et sur la face extérieure de la bague, puis on emmanche la bague sur la traverse 3, puis le bras 2 sur la bague. Alternativement, la traverse 3 peut être munie de nervures et le bras 2 peut comprendre des chanfreins.To obtain a sufficiently high axial stiffness, it is possible to arrange a ring of elastic material, such as for example rubber, between the crossmember 3 and each arm 2. To do this, glue is applied on the inner face and on the outer face of the ring, then we put the ring on the crossbar 3, then the arm 2 on the ring. Alternatively, the cross member 3 may be provided with ribs and the arm 2 may comprise chamfers.
Pour éviter le vieillissement lié à la présence d'humidité, on peut disposer un matériau de colmatage aux extrémités des bras 2, ce qui permet d'éviter le passage de l'eau entre les bras 2 et la traverse 3.To prevent aging due to the presence of moisture, a sealing material can be disposed at the ends of the arms 2, which makes it possible to prevent the passage of water between the arms 2 and the cross-member 3.
Ainsi, l'absence de traitement thermique de la traverse 3 permet de limiter ses distorsions géométriques. Le train 1 obtenu permet d'assurer facilement le parallélisme des roues ainsi que le carrossage des roues. Le nombre de pièces est réduit et la géométrie du train 1 est reproductible, ce qui rend possible un montage du train 1 directement après assemblage. Thus, the lack of heat treatment of the cross member 3 limits its geometric distortions. The train 1 obtained makes it possible to easily ensure the parallelism of the wheels as well as the camber of the wheels. The number of pieces is reduced and the geometry of the train 1 is reproducible, which makes it possible to mount the train 1 directly after assembly.

Claims

REVENDICATIONS
1. Train (1) de véhicule automobile comprenant deux bras (2) longitudinaux de suspension et une traverse (3) de forme allongée insérée à chacune de ses extrémités dans un des bras (2), caractérisé en ce qu'un matériau de liaison est disposé entre la traverse (3) et chaque bras (2), de manière à solidariser la traverse (3) des deux bras (2), et en ce que le matériau de liaison permet une rotation de chaque bras (2) autour de l'axe longitudinal de la traverse (3) en configuration opérationnelle du train (1).Motor vehicle train (1) comprising two longitudinal suspension arms (2) and an elongate cross member (3) inserted at each of its ends in one of the arms (2), characterized in that a connecting material is arranged between the crossmember (3) and each arm (2), so as to secure the crossmember (3) of the two arms (2), and in that the connecting material allows a rotation of each arm (2) around the longitudinal axis of the cross member (3) in the operational configuration of the train (1).
2. Train (1) selon la revendication 1, caractérisé en ce que le matériau de liaison est disposé sur l'ensemble de la surface de contact de la traverse (3) avec chaque bras (2).2. Train (1) according to claim 1, characterized in that the connecting material is disposed over the entire contact surface of the crossbar (3) with each arm (2).
3. Train (1) selon la revendication 1 ou 2, caractérisé en ce que le matériau de liaison est un matériau adhésif à base d'élastomère.3. Train (1) according to claim 1 or 2, characterized in that the bonding material is an elastomeric adhesive material.
4. Train (1) selon l'une des revendications 1 à 3, caractérisé en ce que la traverse (3) comprend un acier de limite élastique supérieure ou égale à 400 MPa.4. Train (1) according to one of claims 1 to 3, characterized in that the cross member (3) comprises a steel with an elastic limit greater than or equal to 400 MPa.
5. Train (1) selon l'une des revendications 1 à 4, caractérisé en ce qu'un élément élastique est disposé entre la traverse (3) et chaque bras (2).5. Train (1) according to one of claims 1 to 4, characterized in that a resilient element is disposed between the crossbar (3) and each arm (2).
6. Véhicule automobile, caractérisé en ce qu'il comprend un train (1) selon l'une des revendications 1 à 5.6. Motor vehicle, characterized in that it comprises a train (1) according to one of claims 1 to 5.
7. Véhicule automobile selon la revendication 6, caractérisé en ce que le train (1) est un train arrière du véhicule. 7. Motor vehicle according to claim 6, characterized in that the train (1) is a rear axle of the vehicle.
PCT/FR2010/050671 2009-04-28 2010-04-07 Twist-beam axle WO2010125269A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10723221A EP2424741A1 (en) 2009-04-28 2010-04-07 Twist-beam axle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0952764A FR2944736B1 (en) 2009-04-28 2009-04-28 MOTOR VEHICLE TRAIN.
FR0952764 2009-04-28

Publications (1)

Publication Number Publication Date
WO2010125269A1 true WO2010125269A1 (en) 2010-11-04

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Application Number Title Priority Date Filing Date
PCT/FR2010/050671 WO2010125269A1 (en) 2009-04-28 2010-04-07 Twist-beam axle

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EP (1) EP2424741A1 (en)
FR (1) FR2944736B1 (en)
WO (1) WO2010125269A1 (en)

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FR2944736A1 (en) 2010-10-29
EP2424741A1 (en) 2012-03-07
FR2944736B1 (en) 2012-12-21

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