WO2005092693A1 - Supporting pillar of a motor vehicle - Google Patents

Supporting pillar of a motor vehicle Download PDF

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Publication number
WO2005092693A1
WO2005092693A1 PCT/EP2005/002463 EP2005002463W WO2005092693A1 WO 2005092693 A1 WO2005092693 A1 WO 2005092693A1 EP 2005002463 W EP2005002463 W EP 2005002463W WO 2005092693 A1 WO2005092693 A1 WO 2005092693A1
Authority
WO
WIPO (PCT)
Prior art keywords
support column
force
profile
stiffening profile
motor vehicle
Prior art date
Application number
PCT/EP2005/002463
Other languages
German (de)
French (fr)
Inventor
Stefan Kolling
Richard Krüger
Hans Mikus
Armin Stapf
Original Assignee
Daimlerchrysler Ag
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 Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2005092693A1 publication Critical patent/WO2005092693A1/en

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Classifications

    • 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
    • B62D25/04—Door pillars ; windshield pillars

Definitions

  • the invention relates to a support column of a motor vehicle according to the preamble of patent claim 1.
  • support columns are generally constructed from double-shell hollow profiles which are connected to one another by means of corresponding flanges. It is known that support pillars, in particular A pillars, must be designed to be correspondingly rigid and stable in order to absorb and transmit forces in the event of a frontal impact.
  • DE 100 37 492 AI shows one possibility of stiffening the support column, in which a stiffening profile is provided in the adjacent area to the roof frame structure.
  • the stiffening profile is arranged between two interconnected hollow profile shells and serves to increase the strength of the vehicle body against an external force.
  • the support columns In addition to the absorption or transmission of force in the event of a frontal impact, the support columns must also be designed for a rollover.
  • the object of the invention is therefore to further develop a support column in such a way that, in the event of a frontal impact, the passenger compartment is maintained and, at the same time, the compatibility with a rollover is improved.
  • a support column is composed of at least two interconnected hollow profile shells. Between the hollow profile shells, a stiffening profile extends in the axial direction of the support column, which is designed to be stiffer for loading by a force extending in a plane running parallel to the longitudinal direction of the vehicle than for loading by a plane perpendicular to it, essentially in a plane running parallel to the transverse direction of the vehicle. acting force.
  • a stiffening profile extends in the axial direction of the support column, which is designed to be stiffer for loading by a force extending in a plane running parallel to the longitudinal direction of the vehicle than for loading by a plane perpendicular to it, essentially in a plane running parallel to the transverse direction of the vehicle. acting force.
  • the support column is designed to be correspondingly soft, that is to say without any notable power transmission into the roof frame area, in order to optimize the behavior of the support column in the event of a roof fall.
  • the stiffening profile thus leads to stiffening of the support column in the event of a frontal impact as well as lower right about a compliant behavior in the event of a roof fall.
  • the stiffening profile can preferably have a U-shaped cross section with two legs and a base, the open side essentially pointing towards the vehicle interior.
  • the base width can be greater than the leg length of the profile so that the support column is stiffer when loaded by a force running in the vertical longitudinal plane of the vehicle than when loaded by a force acting perpendicularly to it.
  • the stiffening profile can also be made so soft by introducing beads that a moment introduction into the front roof frame area can be almost excluded. In this way, the behavior of the support column for the roof can be optimized in particularly critical areas.
  • the stiffening profile can correspondingly increase the stiffness of the support column by shaping elevations.
  • 1 is a side view of a motor vehicle in a view obliquely from behind
  • Fig. 2 is a view of a reinforcing component in the installed position
  • FIG. 3 shows a view of the reinforcing component according to FIG. 2 in a top view.
  • FIG. 4 shows a cross section through an A pillar according to section line in FIG. 1 1 shows a front section of a motor vehicle 1 with a stem 2 and a passenger compartment 3.
  • the passenger compartment 3 is delimited, among other things, by an A pillar 4 and a B pillar 5.
  • A-pillar 4 shows that the A-pillar 4 is composed of an inner hollow profile shell 9 and an outer hollow profile shell 10, which are connected to one another via flanges 11 and 12, respectively.
  • an outer shell 13 is provided, which is also connected to the flanges 11 and 12, respectively.
  • a stiffening profile 14 is arranged between the hollow profile shells 9 and 10 and extends over almost the entire length of the A-pillar 4.
  • Fig. 1 the stiffening profile 14 is shown pulled out of the A-pillar for reasons of clarity, namely in its installed position.
  • the stiffening profile has connections 15 in the lower region, with which the stiffening profile 14 is connected in the region of the A-pillar root 16.
  • the stiffening profile 14 is glued, for example, with structural adhesive.
  • the cross section of the stiffening profile 14 is U-shaped with a base 18 and two legs 19.
  • the legs 19 are considerably shorter than the base 18, so that the stiffening profile 14 is released when a force F L is applied. is very stiff. In contrast, when a force F Q is applied, the stiffening profile 14 is held in a flexible manner.
  • This deformation behavior is reinforced by beads 20 and elevations 21.
  • the beads 20 are arranged in particular where the introduction stiffness for the load FL requires it to prevent the A-pillar from kinking in the event of a frontal impact, while the elevations 21 are in particular outside the area at risk of buckling.
  • the reinforcing component 14 is essentially subjected to forces (cf. F L in FIG. 2) which run in a vertical longitudinal plane of the vehicle.
  • forces cf. F L in FIG. 2
  • high transverse forces are introduced into the A-pillar (cf. F Q in FIG. 3), so that forces act on the reinforcing component 14 which essentially run in the transverse direction of the vehicle.

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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 supporting pillar (4) of a motor vehicle (1) that is composed of at least two interconnected hollow profile shells (9, 10). A reinforcing profile (14) at least partially extends between said hollow profile shells (9, 10). In order to improve the design of a supporting pillar whereby assisting in preserving the passenger cell while simultaneously improving the compatibility in the event of a rollover, the invention provides that the reinforcing profile (14) is provided with a design that is more rigid for withstanding a force FL acting in a vertical longitudinal plane of the vehicle than for withstanding a force FL acting essentially perpendicular to force FL.

Description

Tragsäule eines Kraftfahrzeugs Support column of a motor vehicle
Die Erfindung betrifft eine Tragsäule eines Kraftfahrzeugs gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a support column of a motor vehicle according to the preamble of patent claim 1.
Tragsäulen werden im Kraftfahrzeugbau in der Regel aus zwei- schaligen Hohlprofilen aufgebaut, die mittels entsprechender Flansche miteinander verbunden sind. Es ist bekannt, dass Tragsäulen, insbesondere A-Säulen, entsprechend steif und stabil ausgebildet sein müssen, um bei einem Frontalaufprall Kräfte aufzunehmen und weiterzuleiten.In motor vehicle construction, support columns are generally constructed from double-shell hollow profiles which are connected to one another by means of corresponding flanges. It is known that support pillars, in particular A pillars, must be designed to be correspondingly rigid and stable in order to absorb and transmit forces in the event of a frontal impact.
Eine Möglichkeit, die Tragsäule zu versteifen, zeigt die DE 100 37 492 AI, bei der ein Versteifungsprofil im angrenzenden Bereich zur Dachrahmenstruktur vorgesehen ist. Das Versteifungsprofil ist zwischen zwei miteinander verbundenen Hohlprofilschalen angeordnet und dient dazu, die Festigkeit der Fahrzeugkarosserie gegen eine äußere Kraft zu erhöhen.DE 100 37 492 AI shows one possibility of stiffening the support column, in which a stiffening profile is provided in the adjacent area to the roof frame structure. The stiffening profile is arranged between two interconnected hollow profile shells and serves to increase the strength of the vehicle body against an external force.
Neben der Kraftaufnahme bzw. -weiterleitung im Falle eines Frontalaufpralls müssen die Tragsäulen zusätzlich für einen Überschlag ausgelegt sein.In addition to the absorption or transmission of force in the event of a frontal impact, the support columns must also be designed for a rollover.
Die DE 197 31 284 AI beschreibt eine Maßnahme, bei der in der Tragsäule Schottwände eingebracht sind, durch die die freie Knicklänge der Tragsäule reduziert werden kann. Das Einbringen von derartigen Schottwänden bringt jedoch neben der Reduzierung der Knickneigung auch eine hohe Biege- steifigkeit der Tragsäule in alle Richtungen mit sich, die nicht in allen Lastfällen erwünscht sein kann.DE 197 31 284 AI describes a measure in which bulkheads are introduced into the support column, by means of which the free buckling length of the support column can be reduced. In addition to reducing the tendency to buckling, the introduction of such bulkheads also results in a high bending stiffness of the support column in all directions, which may not be desirable in all load cases.
Die Aufgabe der Erfindung besteht daher darin, eine Tragsäule derart weiterzuentwickeln, dass bei einem Frontalaufprall zum Erhalt der Fahrgastzelle beigetragen und gleichzeitig die Verträglichkeit bei einem Überschlag verbessert wird.The object of the invention is therefore to further develop a support column in such a way that, in the event of a frontal impact, the passenger compartment is maintained and, at the same time, the compatibility with a rollover is improved.
Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Patentanspruchs 1 gelöst .This object is achieved with the features of claim 1.
Erfindungsgemäß ist vorgesehen, dass eine Tragsäule aus wenigstens zwei miteinander verbundenen Hohlprofilschalen zusammengesetzt ist. Zwischen den Hohlprofilschalen erstreckt sich ein Versteifungsprofil in Axialrichtung der Tragsäule, das für eine Beaufschlagung durch eine sich in einer parallel zur Fahrzeuglängsrichtung verlaufenden Ebene erstreckende Kraft steifer ausgebildet ist als für eine Beaufschlagung durch eine senkrecht dazu -im wesentlichen in einer parallel zur Fahrzeugquerrichtung verlaufenden Ebene- einwirkende Kraft. Das hat den Vorteil, dass im Falle eines Frontalaufpralls die Tragsäule ausreichend steif ausgebildet ist, um einen Knick in der Tragsäule zu vermeiden, der sich wegen der daraus resultierenden Türausschnittsverkürzung direkt in der Türöffnungskraft auswirken würde. Gleichzeitig ist die Tragsäule entsprechend weich, d.h. ohne nennenswerte Kraftübertragung in den Dachrahmenbereich, ausgebildet, um das Verhalten der Tragsäule bei einem Dachfall zu optimieren. Das Versteifungsprofil führt somit sowohl zu einer Versteifung der Tragsäule bei einem Frontalaufprall als auch senk- recht dazu zu einem nachgiebigen Verhalten bei einem Dachfall.According to the invention it is provided that a support column is composed of at least two interconnected hollow profile shells. Between the hollow profile shells, a stiffening profile extends in the axial direction of the support column, which is designed to be stiffer for loading by a force extending in a plane running parallel to the longitudinal direction of the vehicle than for loading by a plane perpendicular to it, essentially in a plane running parallel to the transverse direction of the vehicle. acting force. This has the advantage that in the event of a frontal impact, the support column is designed to be sufficiently rigid to avoid a kink in the support column, which would have a direct effect on the door opening force due to the resulting shortening of the door cutout. At the same time, the support column is designed to be correspondingly soft, that is to say without any notable power transmission into the roof frame area, in order to optimize the behavior of the support column in the event of a roof fall. The stiffening profile thus leads to stiffening of the support column in the event of a frontal impact as well as lower right about a compliant behavior in the event of a roof fall.
Vorzugsweise kann das Versteifungsprofil einen U-förmigen Querschnitt mit zwei Schenkeln und einer Basis aufweisen, wobei die offene Seite im Wesentlichen zum Fahrzeuginnenraum weist . Damit die Tragsäule bei Beaufschlagung durch eine in der senkrechten Fahrzeuglangsebene verlaufenden Kraft steifer ausgebildet ist als für die Beaufschlagung durch eine senkrecht dazu einwirkende Kraft, kann die Basisbreite größer sein als die Schenkellänge des Profils.The stiffening profile can preferably have a U-shaped cross section with two legs and a base, the open side essentially pointing towards the vehicle interior. The base width can be greater than the leg length of the profile so that the support column is stiffer when loaded by a force running in the vertical longitudinal plane of the vehicle than when loaded by a force acting perpendicularly to it.
Das Versteifungsprofil kann weiterhin durch das Einbringen von Sicken derart weich ausgestaltet werden, dass eine Momenteneinleitung in den vorderen Dachrahmenbereich nahezu ausgeschlossen werden kann. Damit kann in besonders kritischen Bereichen das Verhalten der Tragsäule für den Dachfall optimiert werden.The stiffening profile can also be made so soft by introducing beads that a moment introduction into the front roof frame area can be almost excluded. In this way, the behavior of the support column for the roof can be optimized in particularly critical areas.
Alternativ kann durch das Ausformen von Erhebungen das Versteifungsprofil entsprechend die Steifigkeit der Tragsäule erhöhen.Alternatively, the stiffening profile can correspondingly increase the stiffness of the support column by shaping elevations.
Eine bevorzugte Ausführungsform wird im folgenden anhand der Zeichnung erläutert. Dabei zeigen:A preferred embodiment is explained below with reference to the drawing. Show:
Fig. 1 eine Seitenansicht eines Kraftfahrzeugs in einer Ansicht schräg von hinten,1 is a side view of a motor vehicle in a view obliquely from behind,
Fig. 2 eine Ansicht eines Verstärkungsbauteils in Einbaulage sowieFig. 2 is a view of a reinforcing component in the installed position and
Fig. 3 eine Ansicht des Verstärkungsbauteils gemäß Fig. 2 in einer Draufsicht.FIG. 3 shows a view of the reinforcing component according to FIG. 2 in a top view.
Fig. 4 einen Querschnitt durch eine A-Säule gemäß Schnittlinie in Fig. 1 In Fig. 1 ist ein vorderer Teilbereich eines Kraftfahrzeugs 1 mit einem Vorbau 2 und einer Fahrgastzelle 3 dargestellt. Die Fahrgastzelle 3 wird unter anderem durch eine A-Säule 4 sowie eine B-Säule 5 begrenzt. Die A-Säule 4 und die B-Säule 5 schließen zusammen mit einem Dachrahmen 6 und einem Tür- schweller 7 eine Türöffnung 8 ein.4 shows a cross section through an A pillar according to section line in FIG. 1 1 shows a front section of a motor vehicle 1 with a stem 2 and a passenger compartment 3. The passenger compartment 3 is delimited, among other things, by an A pillar 4 and a B pillar 5. The A-pillar 4 and the B-pillar 5 together with a roof frame 6 and a door sill 7 enclose a door opening 8.
Aus der Schnittdarstellung in Fig. 4 geht hervor, dass die A- Säule 4 aus einer inneren Hohlprofilschale 9 sowie aus einer äußeren Holprofilschale 10 zusammengesetzt sind, die über Flansche 11 bzw. 12 miteinander verbunden sind. Zudem ist eine Außenschale 13 vorgesehen, die ebenfalls an den Flanschen 11 bzw. 12 angeschlossen ist.4 shows that the A-pillar 4 is composed of an inner hollow profile shell 9 and an outer hollow profile shell 10, which are connected to one another via flanges 11 and 12, respectively. In addition, an outer shell 13 is provided, which is also connected to the flanges 11 and 12, respectively.
Zwischen den Hohlprofilschalen 9 und 10 ist ein Versteifungsprofil 14 angeordnet, dass sich über nahezu die gesamte Länge der A-Säule 4 erstreckt.A stiffening profile 14 is arranged between the hollow profile shells 9 and 10 and extends over almost the entire length of the A-pillar 4.
In Fig. 1 ist das Versteifungsprofil 14 aus Gründen der Übersichtlichkeit aus der A-Säule herausgezogen dargestellt, und zwar in seiner Einbaulage.In Fig. 1, the stiffening profile 14 is shown pulled out of the A-pillar for reasons of clarity, namely in its installed position.
Wie insbesondere aus den Fig. 2 und 3 hervorgeht, weist das Versteifungsprofil im unteren Bereich Anschlüsse 15 auf, mit denen das Versteifungsprofil 14 im Bereich der A-Säulen- Wurzel 16 angeschlossen wird. Im Anschlussbereich 17 zum Dachrahmen 6 ist vorgesehen, dass das Versteifungsprofil 14 beispielsweise mit Strukturkleber verklebt wird.As can be seen in particular from FIGS. 2 and 3, the stiffening profile has connections 15 in the lower region, with which the stiffening profile 14 is connected in the region of the A-pillar root 16. In the connection area 17 to the roof frame 6, it is provided that the stiffening profile 14 is glued, for example, with structural adhesive.
Der Querschnitt des Versteifungsprofil 14 ist U-förmig mit einer Basis 18 sowie zwei Schenkeln 19 ausgebildet. Die Schenkel 19 sind wesentlich kürzer als die Basis 18, so dass das Versteifungsprofil 14 bei Einwirkung einer Kraft FL ent- sprechend steif ist. Bei Einwirkung einer Kraft FQ dagegen ist das Versteifungsprofil 14 nachgiebig gehalten.The cross section of the stiffening profile 14 is U-shaped with a base 18 and two legs 19. The legs 19 are considerably shorter than the base 18, so that the stiffening profile 14 is released when a force F L is applied. is very stiff. In contrast, when a force F Q is applied, the stiffening profile 14 is held in a flexible manner.
Dieses Verformungsverhalten wird durch Sicken 20 und Erhebungen 21 noch verstärkt. Die Sicken 20 sind insbesondere dort angeordnet, wo die Einleitungssteifigkeit für die Last FL es erfordert, um einen Knick der A-Säule beim Frontalaufprall zu verhindern, während die Erhebungen 21 insbesondere außerhalb des knickgefährdeten Bereichs liegen.This deformation behavior is reinforced by beads 20 and elevations 21. The beads 20 are arranged in particular where the introduction stiffness for the load FL requires it to prevent the A-pillar from kinking in the event of a frontal impact, while the elevations 21 are in particular outside the area at risk of buckling.
Kommt es zu einem Frontalaufprall, bei dem Kräfte in die Karosserie gemäß Pfeil A in Fig. 1 eingeleitet werden, wirken auf das Verstärkungsbauteil 14 im wesentlichen Kräfte (vgl. FL in Fig. 2) ein, die in einer senkrechten Fahrzeuglangsebene verlaufen. Bei einem Überschlag dagegen werden in die A- Säule hohe Querkräfte (vgl. FQ in Fig. 3) eingeleitet, so dass auf das Verstärkungsbauteil 14 Kräfte wirken, die im wesentlichen in Fahrzeugquerrichtung verlaufen. If there is a frontal impact, in which forces are introduced into the body according to arrow A in FIG. 1, the reinforcing component 14 is essentially subjected to forces (cf. F L in FIG. 2) which run in a vertical longitudinal plane of the vehicle. In the event of a rollover, on the other hand, high transverse forces are introduced into the A-pillar (cf. F Q in FIG. 3), so that forces act on the reinforcing component 14 which essentially run in the transverse direction of the vehicle.

Claims

Patentansprüche claims
1. Tragsäule eines Kraftfahrzeugs, dass aus wenigstens zwei miteinander verbundenen Hohlprofilschalen zusammengesetzt ist, wobei sich zwischen den Hohlprofilschalen ein Versteifungsprofil zumindest teilweise erstreckt, dadurch gekennzeichnet, dass das Versteifungsprofil (14) für eine Beaufschlagung durch eine in einer senkrechten Fahrzeuglangsebene einwirkende Kraft (FD steifer ausgebildet ist als für eine Beaufschlagung durch eine im wesentlichen senkrecht dazu einwirkende Kraft (FL) .1. Support column of a motor vehicle that is composed of at least two interconnected hollow profile shells, wherein a stiffening profile extends at least partially between the hollow profile shells, characterized in that the stiffening profile (14) for exposure to a force acting in a vertical longitudinal plane of the vehicle (F D is designed to be more rigid than for application by a force (F L ) acting essentially perpendicular to it.
2. Tragsäule nach Anspruch 1, dadurch gekennzeichnet, dass das Versteifungsprofil (14) einen U-förmigen Querschnitt mit zwei Schenkeln (19) und einer Basis (18) aufweist, wobei die Basisbreite größer als die Schenkellänge ist .2. Support column according to claim 1, characterized in that the stiffening profile (14) has a U-shaped cross section with two legs (19) and a base (18), the base width being greater than the leg length.
3. Tragsäule nach Anspruch 2 , dadurch gekennzeichnet, dass das Versteifungsprofil (14) seiner Länge nach mit Sicken (20) versehen ist. Tragsäule nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Versteifungsprofil (14) seiner Länge nach Erhebungen (21) aufweist. 3. Support column according to claim 2, characterized in that the stiffening profile (14) is provided with beads (20) along its length. Support column according to claim 2 or 3, characterized in that the stiffening profile (14) has elevations (21) along its length.
PCT/EP2005/002463 2004-03-17 2005-03-09 Supporting pillar of a motor vehicle WO2005092693A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004012912A DE102004012912A1 (en) 2004-03-17 2004-03-17 Support column of a motor vehicle
DE102004012912.6 2004-03-17

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WO2005092693A1 true WO2005092693A1 (en) 2005-10-06

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PCT/EP2005/002463 WO2005092693A1 (en) 2004-03-17 2005-03-09 Supporting pillar of a motor vehicle

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WO (1) WO2005092693A1 (en)

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US9376398B2 (en) 2012-05-18 2016-06-28 Sumitomo Dainippon Pharma Co., Ltd Carboxylic acid compounds

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DE102008056272A1 (en) * 2008-11-06 2010-05-12 Volkswagen Ag Chassis pillar, particularly A-pillar for use in automobile, particularly cabriolet-vehicle, is allotted with two or multiple bending points with different bending resistances adjustable according to adjacent material regions
DE102009043338B4 (en) * 2009-09-28 2020-07-09 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Frame for a body structure of a motor vehicle
DE102011101551A1 (en) * 2011-05-14 2012-11-15 Volkswagen Aktiengesellschaft Roof frame structure for vehicle, has rail-side roof, which has hollow profile that is defined by lateral parts of rail-side roof, where lateral parts are connected with each other by flange connection
DE102013002421B4 (en) * 2013-02-11 2017-05-11 Audi Ag B-pillar, for a motor vehicle

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DE1808786A1 (en) * 1968-11-14 1970-06-04 Porsche Kg Passenger car with a roller bar
DE1630273A1 (en) * 1967-04-21 1971-04-01 Daimler Benz Ag Hollow beam composed of two half-shells
DE4016730A1 (en) * 1990-05-24 1991-11-28 Daimler Benz Ag Support pillar for car body frame - incorporates interior reinforcement tube
US5810428A (en) * 1994-07-15 1998-09-22 Nissan Motor Co., Ltd. Framework of vehicle body structure

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Publication number Priority date Publication date Assignee Title
DE1630273A1 (en) * 1967-04-21 1971-04-01 Daimler Benz Ag Hollow beam composed of two half-shells
DE1808786A1 (en) * 1968-11-14 1970-06-04 Porsche Kg Passenger car with a roller bar
DE4016730A1 (en) * 1990-05-24 1991-11-28 Daimler Benz Ag Support pillar for car body frame - incorporates interior reinforcement tube
US5810428A (en) * 1994-07-15 1998-09-22 Nissan Motor Co., Ltd. Framework of vehicle body structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9376398B2 (en) 2012-05-18 2016-06-28 Sumitomo Dainippon Pharma Co., Ltd Carboxylic acid compounds

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