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.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=41510940

Family Applications (1)

Country Status (3)

Families Citing this family (1)

Citations (1)

Family Cites Families (11)

• 2009
  • 2009-04-28 FR FR0952764A patent/FR2944736B1/fr not_active Expired - Fee Related
• 2010
  • 2010-04-07 WO PCT/FR2010/050671 patent/WO2010125269A1/fr active Application Filing
  • 2010-04-07 EP EP10723221A patent/EP2424741A1/de not_active Withdrawn

Patent Citations (1)

Non-Patent Citations (1)

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