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EP1289782A1 - Cross strut for a twist-beam rear axle - Google Patents

Cross strut for a twist-beam rear axle

Info

Publication number
EP1289782A1
EP1289782A1 EP02729844A EP02729844A EP1289782A1 EP 1289782 A1 EP1289782 A1 EP 1289782A1 EP 02729844 A EP02729844 A EP 02729844A EP 02729844 A EP02729844 A EP 02729844A EP 1289782 A1 EP1289782 A1 EP 1289782A1
Authority
EP
European Patent Office
Prior art keywords
cross strut
strut according
web
longitudinal bead
longitudinal
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP02729844A
Other languages
German (de)
French (fr)
Inventor
Dieter Etzold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik GmbH
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 Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP1289782A1 publication Critical patent/EP1289782A1/en
Withdrawn legal-status Critical Current

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
    • B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/16—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dynamic absorbers as main damping means, i.e. spring-mass system vibrating out of phase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/001—Suspension arms, e.g. constructional features
    • 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
    • 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
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/20—Type of damper
    • B60G2202/25—Dynamic damper
    • 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
    • B60G2206/70—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
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8101—Shaping by casting

Definitions

  • the invention is based on the object of creating a transverse strut for a torsion-beam axle of a motor vehicle which combines the functions of track, camber and roll stiffness. This object is achieved according to the invention in the features of patent claim 1.
  • the cross strut is now produced from an extruded profile which is composed of a jacket tube and a longitudinal bead which extends radially inwards from the inner surface of the jacket tube, the radial extent of which is smaller than the inner radius of the jacket tube.
  • connection of a jacket tube representing a bending profile to an inner longitudinal bead embodying a torsion bar allows, as in the case of the individual components which belong to the prior art, to independently trim the track, camber and roll stiffness.
  • the bending stiffness of the cross strut is improved due to the inherent inertia of the longitudinal bead.
  • the bending stiffness continues to be positively influenced by the distance of the longitudinal bead from the common profile center of gravity with the casing tube (Steiner portion).
  • the stiffness of the camber can be increased without additional material.
  • a significantly improved material utilization can also take place in the casing tube.
  • the invention provides within the framework of the basic concept of the invention that the wall of the casing tube in its middle length region opposite the edge of the longitudinal bead via a Part of its circumferential length is left out.
  • This configuration of the cross strut specifically serves to reduce its torsional rigidity.
  • torsional stiffness of the cross strut can take place within the scope of the features of claim 2 in that the wall of the casing tube is recessed in the region of its central transverse plane over approximately half the circumferential length. In the direction of the circumferentially closed ends of the casing tube, the circumferential length of the cutout is then continuously reduced to zero.
  • the longitudinal bead is spaced from the inner surface of the casing tube by a radial web. This radial web takes on the function of a push strut.
  • the radial height of the web is larger than the inner radius of the casing tube.
  • the radial height of the web plus the radial extension of the longitudinal bead to the inside diameter of the casing tube is preferably about 0.8: 1, 4, preferably about 1: 1, 2.
  • the thickness of the web is dimensioned approximately equal to the thickness of the wall of the jacket tube, these thicknesses can be optimally matched in such a way that the edge fiber spacing for the jacket tube can be distributed symmetrically. This increases the material utilization and minimizes the weight.
  • the outer diameter of the longitudinal bead is dimensioned approximately equal to three times the thickness of the web.
  • Figure 2 is an enlarged perspective view of a transverse strut of the torsion beam axis of Figure 1;
  • Figure 3 is a side view of the cross strut of Figure 2 and
  • FIG. 4 shows an enlarged front view of the cross strut in the direction of arrow IV in FIG. 3.
  • 1 in FIG. 1 denotes a torsion-beam axle for a motor vehicle.
  • the torsion beam axle 1 generally comprises two trailing arms 2 (not explained in more detail) and a transverse strut 3 connecting the trailing arms 2.
  • the transverse strut 3 is designed cylindrically overall and passes through recesses 4 in the trailing arms 2 which are adapted to the outer contour of the transverse strut 3.
  • the cross strut 3 consists of an extruded profile made of an aluminum alloy.
  • This extruded profile is composed of a jacket tube 5 as a bending profile and a web 7 which extends radially inward from the inner surface 6 of the jacket tube 5 as a push strut with an edge-side longitudinal bead 11 as a torsion bar.
  • the central longitudinal plane 8 of the web 7 runs through the longitudinal axis 9 and thus also through the central longitudinal plane MLE of the casing tube 5.
  • the thickness D of the web 7 corresponds approximately to the thickness D1 of the wall 10 of the casing tube 5.
  • the longitudinal bead 11 is tubular.
  • the radial extent RE of the longitudinal bead 11 is approximately equal to three times the thickness D of the web 7.
  • the radial height H of the web 7 is larger than the inner radius IR of the casing tube 5, but smaller than the inner diameter ID.
  • the ratio of the radial height H of the web 7 plus the radial extent RE of the longitudinal bead 11 in relation to the inner diameter ID of the casing tube 5 is approximately 1: 1, 2.
  • the wall 10 of the casing tube 5 is recessed in its central length area MLB opposite the longitudinal bead 11 over part of its circumferential length UL. In the area of the central transverse plane MQE of the casing tube 5, the wall 10 is recessed approximately over half the circumferential length UL. In the direction of the ends 12 of the casing tube 5 which are closed on the circumference, the circumferential length of the cutout 13 is reduced to zero.
  • the axial length L of the recess 13 is approximately 5: 1 to the length L1 of the circumferentially closed ends 12 of the casing tube 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The invention relates to a cross strut (3) for a twist-beam rear axle of a motor vehicle, comprising an extruded section that is composed of a casing tube (5) and a connector bar (7) with a longitudinally channeled longitudinal bulge (11) at the end that extends radially inward from the inner surface of the casing tube (5). The radial height of the connector bar (7) plus the radial extension of the longitudinal bulge (11) is smaller than the inner diameter of the casing tube (5). The wall (10) of the casing tube (5), across a part of its circumference, is provided with a recess (13) in its center longitudinal area (MLB) opposite the longitudinal bulge (11).

Description

Querstrebe für eine Verbundlenkerachse Cross strut for a twist beam axle
Zur Einstellung der Spur-, Sturz- und Rollsteifigkeit ist es bekannt, neben der Querstrebe für eine Verbundlenkerachse einen Torsionsstab einzusetzen. Hierbei werden die Funktionen Spur-, Sturz- und Rollsteifigkeit jeweils im wesentlichen von den Einzelkomponenten übernommen. Auf diese Weise kann ein unabhängiges Trimmen dieser einzelnen Funktionen vorgenommen werden.To adjust the track, camber and roll stiffness, it is known to use a torsion bar in addition to the cross strut for a torsion beam axle. The functions of track, camber and roll stiffness are essentially carried out by the individual components. In this way, these individual functions can be trimmed independently.
Erforderlich ist aber ein zusätzlicher Torsionsstab mit dem damit verbundenen Aufwand.However, an additional torsion bar with the associated effort is required.
Der Erfindung liegt - ausgehend vom Stand der Technik - die Aufgabe zugrunde, eine Querstrebe für eine Verbundlenkerachse eines Kraftfahrzeuges zu schaffen, welche die Funktionen Spur-, Sturz- und Rollsteifigkeit in sich vereinigt. Die Lösung dieser Aufgabe besteht nach der Erfindung in den Merkmalen des Patentanspruchs 1.Starting from the prior art, the invention is based on the object of creating a transverse strut for a torsion-beam axle of a motor vehicle which combines the functions of track, camber and roll stiffness. This object is achieved according to the invention in the features of patent claim 1.
Die Querstrebe wird nunmehr aus einem Strangpressprofil hergestellt, dass sich aus einem Mantelrohr und einem sich von der inneren Oberfläche des Mantelrohrs radial einwärts erstreckenden Längswulst zusammensetzt, dessen radiale Erstreckung kleiner als der Innenradius des Mantelrohrs bemessen ist.The cross strut is now produced from an extruded profile which is composed of a jacket tube and a longitudinal bead which extends radially inwards from the inner surface of the jacket tube, the radial extent of which is smaller than the inner radius of the jacket tube.
Die Verbindung eines ein Biegeprofil darstellenden Mantelrohrs mit einem einen Torsionsstab verkörpernden inneren Längswulst erlaubt es, wie bei den zum Stand der Technik zählenden Einzelkomponenten, Spur-, Sturz- und Rollsteifigkeit unabhängig zu trimmen. Hierbei wird die Biegesteifigkeit der Querstrebe aufgrund der Eigenträgheit des Längswulsts verbessert. Hinzu kommt, dass durch den Abstand des Längswulstes vom gemeinsamen Profilschwerpunkt mit dem Mantelrohr weiterhin die Biegesteifigkeit positiv beeinflusst wird (Steiner Anteil). Demzufolge kann die Sturzsteifigkeit ohne zusätzlichen Materialeinsatz erhöht werden. Darüber hinaus kann auch beim Mantelrohr eine deutlich verbesserte Materialausnutzung erfolgen. Der Grund ist darin zu sehen, dass der Schwerpunkt der Querstrebe aufgrund der Masse des Längswulstes - bezogen auf den Eigenschwerpunkt - in Richtung auf den Längswulst verlagert wird. Die Materialnutzung ist mithin optimal bei geringem Gewicht. Ferner kann eine spannungsoptimale Gestaltung des Längswulstes in Abhängigkeit von den jeweiligen Anforderungen gewählt werden. Durch Variation der Konfiguration und der Abmessungen des Längswulstes ist es schließlich möglich, Achsvarianten mit unterschiedlichen Rollsteifigkeitsanforderungen abzudecken.The connection of a jacket tube representing a bending profile to an inner longitudinal bead embodying a torsion bar allows, as in the case of the individual components which belong to the prior art, to independently trim the track, camber and roll stiffness. The bending stiffness of the cross strut is improved due to the inherent inertia of the longitudinal bead. In addition, the bending stiffness continues to be positively influenced by the distance of the longitudinal bead from the common profile center of gravity with the casing tube (Steiner portion). As a result, the stiffness of the camber can be increased without additional material. In addition, a significantly improved material utilization can also take place in the casing tube. The reason for this is that the center of gravity of the cross strut is shifted towards the longitudinal bead due to the mass of the longitudinal bead - based on the center of gravity. The material use is therefore optimal with low weight. Furthermore, a tension-optimal design of the longitudinal bead can be selected depending on the respective requirements. By varying the configuration and the dimensions of the longitudinal bead, it is finally possible to cover axle variants with different roll stiffness requirements.
Des Weiteren sieht die Erfindung im Rahmen des grundsätzlichen Erfindungsgedankens vor, dass die Wand des Mantelrohrs in dessen mittleren Längenbereich dem Rand des Längswulstes gegenüberliegend über einen Teil ihrer Umfangslänge ausgespart ist. Diese Ausgestaltung der Querstrebe dient gezielt einer Verkleinerung ihrer Torsionssteifigkeit.Furthermore, the invention provides within the framework of the basic concept of the invention that the wall of the casing tube in its middle length region opposite the edge of the longitudinal bead via a Part of its circumferential length is left out. This configuration of the cross strut specifically serves to reduce its torsional rigidity.
Weitere Variationen der Torsionssteifigkeit der Querstrebe können im Rahmen der Merkmale des Patentanspruchs 2 dadurch erfolgen, dass die Wand des Mantelrohrs im Bereich seiner Mittelquerebene über etwa die halbe Umfangslänge ausgespart ist. In Richtung auf die umfangsseitig geschlossenen Enden des Mantelrohrs verringert sich dann die Umfangslänge der Aussparung hin kontinuierlich bis auf Null.Further variations of the torsional stiffness of the cross strut can take place within the scope of the features of claim 2 in that the wall of the casing tube is recessed in the region of its central transverse plane over approximately half the circumferential length. In the direction of the circumferentially closed ends of the casing tube, the circumferential length of the cutout is then continuously reduced to zero.
In diesem Zusammenhang kann es entsprechend den Merkmalen des Patentanspruchs 3 vorteilhaft sein, dass die axiale Länge der Aussparung zur axialen Länge der umfangsseitig geschlossenen Enden des Mantelrohrs etwa wie 4:1 bis 6:1 , vorzugsweise etwa wie 5:1 , bemessen ist. Wie groß die axiale Länge der geschlossenen Enden des Mantelrohrs ist, hängt von den jeweiligen Erfordernissen, insbesondere von der Art der Fügung der Querstrebe mit den Längslenkern, ab.In this context, it can be advantageous according to the features of claim 3 that the axial length of the recess to the axial length of the circumferentially closed ends of the casing tube is about 4: 1 to 6: 1, preferably about 5: 1. The size of the axial length of the closed ends of the casing tube depends on the respective requirements, in particular on the type of joining of the cross strut with the trailing arms.
Eine Möglichkeit, die Rollsteifigkeit leicht variieren zu können, wird in den Merkmalen des Patentanspruchs 4 erblickt. Danach ist der Längswulst rohr- förmig ausgebildet. Sein geschlossener Längskanal kann von der Größe des Querschnitts her an die jeweiligen Anforderungen angepasst werden.One possibility of being able to vary the roll stiffness slightly is seen in the features of patent claim 4. The longitudinal bead is then tubular. Its closed longitudinal channel can be adapted to the respective requirements in terms of the size of the cross section.
Eine weitere Verbesserung sehen die Merkmale des Patentanspruchs 5 vor. Bei dieser vorteilhaften Ausführungsform ist der Längswulst durch einen Radialsteg zur inneren Oberfläche des Mantelrohrs distanziert. Dieser Radialsteg übernimmt die Aufgabe einer Schubstrebe.The features of claim 5 provide a further improvement. In this advantageous embodiment, the longitudinal bead is spaced from the inner surface of the casing tube by a radial web. This radial web takes on the function of a push strut.
Idealerweise erstreckt sich der Steg nach Patentanspruch 6 in der Mittellängsebene des Mantelrohrs.Ideally, the web extends according to claim 6 in the central longitudinal plane of the tubular casing.
Auch ist es von Vorteil, wenn entsprechend den Merkmalen des Patentanspruchs 7 die radiale Höhe des Stegs größer als der Innenradius des Mantelrohrs bemessen ist. Hierbei ist gemäß Patentanspruch 8 die radiale Höhe des Stegs zuzüglich der radialen Erstreckung des Längswulstes zum Innendurchmesser des Mantelrohrs bevorzugt etwa wie 0,8:1 ,4, vorzugsweise etwa wie 1 :1 ,2 bemessen.It is also advantageous if, according to the features of claim 7, the radial height of the web is larger than the inner radius of the casing tube. According to claim 8, the radial height of the web plus the radial extension of the longitudinal bead to the inside diameter of the casing tube is preferably about 0.8: 1, 4, preferably about 1: 1, 2.
Wenn nach den Merkmalen des Patentanspruchs 9 die Dicke des Stegs etwa gleich der Dicke der Wand des Mantelrohrs bemessen ist, kann eine optimale Abstimmung dieser Dicken dahingehend erfolgen, dass der Randfaserabstand für das Mantelrohr symmetrisch verteilt werden kann. Dies erhöht die Materialausnutzung und minimiert das Gewicht.If, according to the features of claim 9, the thickness of the web is dimensioned approximately equal to the thickness of the wall of the jacket tube, these thicknesses can be optimally matched in such a way that the edge fiber spacing for the jacket tube can be distributed symmetrically. This increases the material utilization and minimizes the weight.
Dabei ist der Außendurchmesser des Längswulstes nach Patentanspruch 10 etwa gleich dem dreifachen der Dicke des Stegs bemessen.The outer diameter of the longitudinal bead is dimensioned approximately equal to three times the thickness of the web.
Obwohl es erfindungsgemäß möglich ist, jedes zum Strangpressen geeignete Material zur Herstellung der Querstrebe einzusetzen, besteht eine besonders vorteilhafte Ausbildung in den Merkmalen des Patentanspruchs 11 , wonach die Querstrebe aus Aluminium oder einer Aluminiumlegierung gebildet ist.Although it is possible according to the invention to use any material suitable for the extrusion for producing the cross strut, there is a particularly advantageous embodiment in the features of claim 11, according to which the cross strut is formed from aluminum or an aluminum alloy.
Die Erfindung ist nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:The invention is explained below with reference to an embodiment shown in the drawings. Show it:
Figur 1 in schematischer Perspektive eine Verbundlenkerachse für einFigure 1 in a schematic perspective a torsion beam axle for a
Kraftfahrzeug;Motor vehicle;
Figur 2 in vergrößerter perspektivischer Darstellung eine Querstrebe der Verbundlenkerachse der Figur 1 ;Figure 2 is an enlarged perspective view of a transverse strut of the torsion beam axis of Figure 1;
Figur 3 eine Seitenansicht auf die Querstrebe der Figur 2 undFigure 3 is a side view of the cross strut of Figure 2 and
Figur 4 in vergrößerter Darstellung eine Stirnansicht auf die Querstrebe in Richtung des Pfeils IV der Figur 3. Mit 1 ist in der Figur 1 eine Verbundlenkerachse für ein Kraftfahrzeug bezeichnet. Die Verbundlenkerachse 1 umfasst ganz allgemein zwei nicht näher erläuterte Längslenker 2 sowie eine die Längslenker 2 verbindende Querstrebe 3. Die Querstrebe 3 ist insgesamt zylindrisch gestaltet und durchsetzt an die Außenkontur der Querstrebe 3 angepasste Ausnehmungen 4 in den Längslenkern 2.FIG. 4 shows an enlarged front view of the cross strut in the direction of arrow IV in FIG. 3. 1 in FIG. 1 denotes a torsion-beam axle for a motor vehicle. The torsion beam axle 1 generally comprises two trailing arms 2 (not explained in more detail) and a transverse strut 3 connecting the trailing arms 2. The transverse strut 3 is designed cylindrically overall and passes through recesses 4 in the trailing arms 2 which are adapted to the outer contour of the transverse strut 3.
Wie die Figuren 2 bis 4 bei gemeinsamer Betrachtung näher erkennen lassen, besteht die Querstrebe 3 aus einem Strangpressprofil aus einer Aluminium-Legierung. Dieses Strangpressprofil setzt sich aus einem Mantelrohr 5 als Biegeprofil und einem sich von der inneren Oberfläche 6 des Mantelrohrs 5 radial einwärts erstreckenden Steg 7 als Schubstrebe mit randseitigem Längswulst 11 als Torsionsstab zusammen. Die Mittellängsebene 8 des Stegs 7 verläuft durch die Längsachse 9 und damit auch durch die Mittellängsebene MLE des Mantelrohrs 5. Die Dicke D des Stegs 7 entspricht etwa der Dicke D1 der Wand 10 des Mantelrohrs 5.As can be seen in more detail in FIGS. 2 to 4, the cross strut 3 consists of an extruded profile made of an aluminum alloy. This extruded profile is composed of a jacket tube 5 as a bending profile and a web 7 which extends radially inward from the inner surface 6 of the jacket tube 5 as a push strut with an edge-side longitudinal bead 11 as a torsion bar. The central longitudinal plane 8 of the web 7 runs through the longitudinal axis 9 and thus also through the central longitudinal plane MLE of the casing tube 5. The thickness D of the web 7 corresponds approximately to the thickness D1 of the wall 10 of the casing tube 5.
Der Längswulst 11 ist rohrförmig ausgebildet. Die radiale Erstreckung RE des Längswulstes 11 ist etwa gleich dem dreifachen der Dicke D des Stegs 7 bemessen.The longitudinal bead 11 is tubular. The radial extent RE of the longitudinal bead 11 is approximately equal to three times the thickness D of the web 7.
Die radiale Höhe H des Stegs 7 ist größer als der Innenradius IR des Mantelrohrs 5, aber kleiner als der Innendurchmesser ID bemessen. Das Verhältnis der radialen Höhe H des Stegs 7 zuzüglich der radialen Erstreckung RE des Längswulstes 11 in Relation zum Innendurchmesser ID des Mantelrohrs 5 beträgt etwa 1 :1 ,2.The radial height H of the web 7 is larger than the inner radius IR of the casing tube 5, but smaller than the inner diameter ID. The ratio of the radial height H of the web 7 plus the radial extent RE of the longitudinal bead 11 in relation to the inner diameter ID of the casing tube 5 is approximately 1: 1, 2.
Die Wand 10 des Mantelrohrs 5 ist in dessen mittleren Längenbereich MLB dem Längswulst 11 gegenüberliegend über einen Teil seiner Umfangslänge UL ausgespart. Im Bereich der Mittelquerebene MQE des Mantelrohrs 5 ist die Wand 10 etwa über die halbe Umfangslänge UL ausgespart. In Richtung auf die umfangsseitig geschlossenen Enden 12 des Mantelrohrs 5 verringert sich die Umfangslänge der Aussparung 13 bis auf Null. Die axiale Länge L der Aussparung 13 ist zur Länge L1 der umfangsseitig geschlossenen Enden 12 des Mantelrohrs 5 etwa wie 5:1 bemessen. The wall 10 of the casing tube 5 is recessed in its central length area MLB opposite the longitudinal bead 11 over part of its circumferential length UL. In the area of the central transverse plane MQE of the casing tube 5, the wall 10 is recessed approximately over half the circumferential length UL. In the direction of the ends 12 of the casing tube 5 which are closed on the circumference, the circumferential length of the cutout 13 is reduced to zero. The axial length L of the recess 13 is approximately 5: 1 to the length L1 of the circumferentially closed ends 12 of the casing tube 5.
Bezugszeichenaufstellung:REFERENCE NUMBERS:
1 - Verbundlenkerachse1 - Twist beam axle
2 - Längslenker von 12 - trailing arm of 1
3 - Querstrebe von 13 - cross brace from 1
4 - Ausnehmungen in 2 für 34 - recesses in 2 for 3
5 - Mantelrohr von 35 - casing tube of 3
6 - innere Oberfläche von 56 - inner surface of 5
7 - Steg von 37 - bridge of 3
8 - Mittellängsebene von 78 - median longitudinal plane of 7
9 - Längsachse von 5 10 - Wand von 59 - longitudinal axis of 5 10 - wall of 5
11 - Längswulst an 711 - longitudinal bead on 7
12 - Enden von 512 - ends of 5
13 - Aussparung in 1013 - recess in 10
D - Dicke von 7D - thickness of 7
D1 - Dicke von 10D1 - thickness of 10
H - radiale Höhe von 7H - radial height of 7
ID - Innendurchmesser von 5ID - inner diameter of 5
IR - Innenradius von 5IR inner radius of 5
L - Länge von 13L - length of 13
L1 - Länge von 12L1 - length of 12
MLB - mittlerer Längenbereich von 5MLB - medium length range from 5
MLE - Mittellängsebene von 5 QE - Mittelquerebene von 5MLE - median longitudinal plane of 5 QE - median transverse plane of 5
RE - radiale Erstreckung von 11RE - radial extension of 11
UL - Umfangslänge von 3 UL - circumferential length of 3

Claims

Patentansprüche claims
1. Querstrebe für eine Verbundlenkerachse (1 ) eines Kraftfahrzeugs, die aus einem Strangpressprofil besteht, das sich aus einem Mantelrohr (5) und einem sich von der inneren Oberfläche (6) des Mantelrohrs (5) radial einwärts erstreckenden Längswulst (7) zusammensetzt, dessen radiale Erstreckung (RE) kleiner als der Innenradius (IR) des Mantelrohrs (5) bemessen ist, wobei die Wand (10) des Mantelrohrs (5) in dessen mittleren Längenbereich (MLB) dem Längswulst (11 ) gegenüberliegend über einen Teil ihrer Umfangslänge (UL) ausgespart ist.1. cross strut for a torsion beam axle (1) of a motor vehicle, which consists of an extruded profile which is composed of a jacket tube (5) and a longitudinal bead (7) extending radially inward from the inner surface (6) of the jacket tube (5), whose radial extension (RE) is smaller than the inner radius (IR) of the jacket tube (5), the wall (10) of the jacket tube (5) in its central length region (MLB) opposite the longitudinal bead (11) over part of its circumferential length (UL) is left out.
2. Querstrebe nach Patentanspruch 1 , bei welcher die Wand (10) des Mantelrohrs (5) im Bereich seiner Mittelquerebene (MQE) über etwa die halbe Umfangslänge (UL) ausgespart ist, wobei sich die Umfangslänge der Aussparung (13) in Richtung auf die umfangsseitig geschlossenen Enden (12) des Mantelrohrs (5) hin kontinuierlich bis auf Null verringert.2. Cross strut according to claim 1, in which the wall (10) of the casing tube (5) in the region of its central transverse plane (MQE) is recessed over approximately half the circumferential length (UL), the circumferential length of the recess (13) in the direction of the ends (12) of the casing tube (5) closed on the circumference continuously reduced to zero.
3. Querstrebe nach Patentanspruch 1 oder 2, bei welcher die axiale Länge (L) der Aussparung (13) zur axialen Länge (L1 ) der umfangsseitig geschlossenen Enden (12) des Mantelrohrs (5) etwa wie 4:1 bis 6:1 , vorzugsweise etwa wie 5:1 , bemessen ist.3. cross strut according to claim 1 or 2, in which the axial length (L) of the recess (13) to the axial length (L1) of the circumferentially closed ends (12) of the tubular casing (5) approximately as 4: 1 to 6: 1, preferably about 5: 1.
4. Querstrebe nach einem der Patentansprüche 1 bis 3, bei welcher der Längswulst (11 ) rohrförmig ausgebildet ist.4. Cross strut according to one of claims 1 to 3, in which the longitudinal bead (11) is tubular.
5. Querstrebe nach einem der Patentansprüche 1 bis 4, bei welcher der Längswulst (11 ) durch einen Radialsteg (7) zur inneren Oberfläche (6) des Mantelrohrs (5) distanziert ist.5. Cross strut according to one of claims 1 to 4, in which the longitudinal bead (11) is spaced by a radial web (7) to the inner surface (6) of the tubular casing (5).
6. Querstrebe nach Patentanspruch 5, bei welcher sich der Steg (7) in der Mittellängsebene (MLE) des Mantelrohrs (5) erstreckt. 6. Cross strut according to claim 5, in which the web (7) extends in the central longitudinal plane (MLE) of the casing tube (5).
7. Querstrebe nach Patentanspruch 5 oder 6, bei welcher die radiale Höhe (H) des Stegs (7) größer als der Innenradius (IR) des Mantelrohrs (5) bemessen ist.7. Cross strut according to claim 5 or 6, wherein the radial height (H) of the web (7) is larger than the inner radius (IR) of the tubular casing (5).
8. Querstrebe nach einem der Patentansprüche 5 bis 7, bei welcher die radiale Höhe (H) des Stegs (7) zuzüglich der radialen Erstreckung (RE) des Längswulstes (11 ) in Relation zum Innendurchmesser (ID) des Mantelrohrs (5) etwa wie 0,8:1 ,4, vorzugsweise etwa wie 1 :1 ,2, bemessen ist.8. Cross strut according to one of claims 5 to 7, in which the radial height (H) of the web (7) plus the radial extent (RE) of the longitudinal bead (11) in relation to the inner diameter (ID) of the tubular casing (5) approximately as 0.8: 1, 4, preferably about 1: 1, 2, dimensioned.
9. Querstrebe nach einem der Patentansprüche 5 bis 8, bei welcher die Dicke (D) des Stegs (7) etwa gleich der Dicke (D1 ) der Wand (10) des Mantelrohrs (5) bemessen ist.9. Cross strut according to one of the claims 5 to 8, in which the thickness (D) of the web (7) is approximately equal to the thickness (D1) of the wall (10) of the tubular casing (5).
10. Querstrebe nach Patentanspruch 9, bei welcher die radiale Erstreckung (RE) des Längswulstes (11 ) etwa gleich dem Dreifachen der Dicke (D) des Stegs (7) bemessen ist.10. Cross strut according to claim 9, wherein the radial extension (RE) of the longitudinal bead (11) is approximately equal to three times the thickness (D) of the web (7).
11. Querstrebe nach einem der Patentansprüche 1 bis 10, die aus Aluminium oder einer Aluminium-Legierung gebildet ist. 11. Cross strut according to one of claims 1 to 10, which is formed from aluminum or an aluminum alloy.
EP02729844A 2001-04-04 2002-04-03 Cross strut for a twist-beam rear axle Withdrawn EP1289782A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10116748A DE10116748B4 (en) 2001-04-04 2001-04-04 Cross strut for a torsion beam axle
DE10116748 2001-04-04
PCT/DE2002/001189 WO2002081239A1 (en) 2001-04-04 2002-04-03 Cross strut for a twist-beam rear axle

Publications (1)

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EP1289782A1 true EP1289782A1 (en) 2003-03-12

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EP02729844A Withdrawn EP1289782A1 (en) 2001-04-04 2002-04-03 Cross strut for a twist-beam rear axle

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US (1) US6708994B2 (en)
EP (1) EP1289782A1 (en)
CZ (1) CZ293147B6 (en)
DE (1) DE10116748B4 (en)
WO (1) WO2002081239A1 (en)

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Also Published As

Publication number Publication date
DE10116748A1 (en) 2002-10-17
US6708994B2 (en) 2004-03-23
DE10116748B4 (en) 2006-10-05
CZ293147B6 (en) 2004-02-18
WO2002081239A1 (en) 2002-10-17
CZ20023972A3 (en) 2003-04-16
US20030071432A1 (en) 2003-04-17

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