WO2005000664A1 - Front-end of a motor vehicle - Google Patents

Front-end of a motor vehicle Download PDF

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Publication number
WO2005000664A1
WO2005000664A1 PCT/EP2004/006770 EP2004006770W WO2005000664A1 WO 2005000664 A1 WO2005000664 A1 WO 2005000664A1 EP 2004006770 W EP2004006770 W EP 2004006770W WO 2005000664 A1 WO2005000664 A1 WO 2005000664A1
Authority
WO
WIPO (PCT)
Prior art keywords
floor structure
motor vehicle
support element
stem
forces
Prior art date
Application number
PCT/EP2004/006770
Other languages
German (de)
French (fr)
Inventor
Marco Herok
Joachim Herre
Axel Landenberger
Jochen Ruf
Josef Sailer
Alfred Schnabel
Bogdan Trzcionka
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 WO2005000664A1 publication Critical patent/WO2005000664A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—Front or rear frames
    • B62D21/155—Sub-frames or underguards

Definitions

  • the invention relates to a front end of a motor vehicle with two front side rails, according to the preamble of patent claim 1.
  • DE 198 58 303 AI shows a generic stem, which comprises two longitudinal beams that are cranked in the area of the front end wall.
  • the front end members are connected to a function carrier at four attachment points in a force-transmitting manner, the two rear attachment points being connected to the transition area of the front end members.
  • a support element extends from a function carrier in the direction of the floor structure, so that forces are introduced into the floor structure. This means that impact forces are not only introduced into the transition area of the front side members via the two rear attachment points, but also into an area that is arranged much closer to the floor structure.
  • the front side member for example in the area of the wheel arch, can thus be dimensioned smaller in order to improve the packaging. At the same time, a further force path in the floor structure is made possible via the support element.
  • the support element is preferably connected to the transition region of the front side member, which extends between the lower floor structure and the engine compartment.
  • the support element can have a fastening section with which it can be fastened to the function carrier. This attachment can be done by means of a screw connection, but also by means of a plug connection. A second fastening section is provided opposite the first fastening section of the support element and is connected to the front side member. Plug or screw connections are also possible here.
  • the support element is a support tube.
  • FIG. 1 shows a front end of a motor vehicle in a view from below and
  • FIG. 2 shows a perspective view of a side member according to FIG. 1 in a view obliquely from the side.
  • Fig. 1 shows a stem 1 of a motor vehicle 2 not shown in a view from below.
  • the stem 1 comprises two stem longitudinal members 3, which are arranged mirror-symmetrically to the longitudinal axis L of the vehicle.
  • the front side members 3 are connected to a bumper arrangement 4, which closes the front end 1.
  • the front side members 3 can be designed as fork supports and connected laterally to the door sill 5.
  • the front side members 3 extend in the engine compartment 6 and are connected to one another by a functional member 7.
  • the function carrier 7 is the carrier of the drive unit (not shown) and the chassis 8 (indicated schematically).
  • the function carrier 7 is mounted on the front side member 3 by means of four fastening points 9.
  • the front side member 3 is in three Subdivide sections, namely into a front side member section 10, a central transition area 11 and a rear side member section 12.
  • a support element 13 is provided in the rear area of the function carrier 7, which is fastened on the one hand to the function carrier 7 and is supported on the other on the rear longitudinal beam section 12.
  • the support element 13 is fastened by means of a fastening section 14 which is designed such that it engages in a projection 15 of the function carrier 7.
  • the fastening section 14 is configured similarly to a fork carrier.
  • a second fastening section 16 is located opposite the fastening section 14 and is supported on the rear longitudinal member section 12.
  • the support element 13 bridges the cranked transition region 11, so that in addition to the force path via the rear fastening points 9, a further force path via the support element 13 into the rear longitudinal member section 12 is made possible.

Abstract

The invention relates to a front-end (1) of a motor vehicle (2), comprising two front-end frame side members (3), which extend in the vicinity of the front end-wall by means of a transition zone (11) from the engine compartment (6) to the lower-lying floor structure. The front-end (1) comprises a functional support (7), which is connected to the frame side members (3) by means of two rear fixing points (9) in the transition zone (11), in order to transmit forces. The aim of the invention is to increase the constructive freedom of movement in the front-end region of a motor vehicle. To achieve this, a support element (13) extends from the functional support (7) towards the floor structure, to permit forces to be introduced into said structure.

Description

DaimlerChrysler AGDaimlerChrysler AG
Vorbau eines KraftfahrzeugsStem of a motor vehicle
Die Erfindung betrifft einen Vorbau eines Kraftfahrzeugs mit zwei Vorbaulängsträgern gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a front end of a motor vehicle with two front side rails, according to the preamble of patent claim 1.
Aus der DE 198 36 851 Cl ist bekannt, eine Zugstrebe vorzusehen, um gezielt Kräfte von der Stirnwand wegzuleiten und diese somit vor einer übermäßigen Deformation und Intrusion durch ein Kraftfahrzeugrad zu schützen.From DE 198 36 851 Cl it is known to provide a tension strut in order to direct forces away from the end wall and thus to protect it from excessive deformation and intrusion by a motor vehicle wheel.
Die DE 198 58 303 AI zeigt einen gattungsgemäßen Vorbau, der zwei Vorbaulängsträger umfasst, die im Bereich der vorderen Stirnwand gekröpft verlaufen. Das bedeutet, dass sich die Vorbaulängsträger mit einem Übergangsbereich vom Motorraum zur niedriger gelegenen Bodenstruktur erstrecken. Die Vorbaulängsträger sind mit einem Funktionsträger an vier Befestigungspunkten kraftübertragend verbunden, wobei die zwei hinteren Befestigungspunkte am Übergangsbereich der Vorbaulängs- träger angeschlossen sind.DE 198 58 303 AI shows a generic stem, which comprises two longitudinal beams that are cranked in the area of the front end wall. This means that the front side members extend with a transition area from the engine compartment to the lower floor structure. The front end members are connected to a function carrier at four attachment points in a force-transmitting manner, the two rear attachment points being connected to the transition area of the front end members.
Bei einem Frontalcrash werden Kräfte von dem Funktionsträger über die Befestigungspunkte in die Längsträger eingeleitet, so dass Kraftpfade bis in die Bodenstruktur des Kraftfahrzeugs gewährleistet sind. Die konstruktive Freizügigkeit im Vorbaubereich eines Kraftfahrzeugs wird durch die Anforderungen der passiven Sicherheitstechnik stark beeinflusst.In the event of a frontal crash, forces from the function carrier are introduced into the side members via the fastening points, so that force paths are guaranteed right into the floor structure of the motor vehicle. The structural freedom of movement in the front section of a motor vehicle is strongly influenced by the requirements of passive safety technology.
Es besteht daher die Aufgabe der Erfindung, einen Vorbau eines Kraftfahrzeugs zu schaffen, bei dem unter Gewährleistung des Energieabbaus bei einem Aufprall die konstruktive Freizügigkeit erhöht wird.It is therefore an object of the invention to provide a front end of a motor vehicle in which the structural freedom of movement is increased in the event of an impact in the event of an energy breakdown.
Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Patentanspruchs 1 gelöst .This object is achieved with the features of claim 1.
Von einem Funktionsträger erstreckt sich in Richtung der Bodenstruktur ein Abstützelement, so dass Kräfte in die Bodenstruktur eingeleitet werden. Damit werden Aufprallkräfte nicht nur über die zwei hinteren Befestigungspunkte in den Übergangsbereich der Vorbaulängsträger eingeleitet, sondern auch in einen Bereich, der wesentlich näher an der Bodenstruktur angeordnet ist. Somit kann der Vorbaulängsträger, beispielsweise im Bereich des Radkastens, geringer dimensioniert werden, um das Packaging zu verbessern. Gleichzeitig wird über das Abstützelement ein weiterer Kraftpfad in der Bodenstruktur ermöglicht.A support element extends from a function carrier in the direction of the floor structure, so that forces are introduced into the floor structure. This means that impact forces are not only introduced into the transition area of the front side members via the two rear attachment points, but also into an area that is arranged much closer to the floor structure. The front side member, for example in the area of the wheel arch, can thus be dimensioned smaller in order to improve the packaging. At the same time, a further force path in the floor structure is made possible via the support element.
Vorzugsweise ist das Abstützelement mit dem Übergangsbereich der Vorbaulängsträger verbunden, der sich zwischen der niedriger gelegenen Bodenstruktur und Motorraum erstreckt .The support element is preferably connected to the transition region of the front side member, which extends between the lower floor structure and the engine compartment.
Das Abstützelement kann einen Befestigungsabschnitt aufweisen, mit dem es an dem Funktionsträger befestigt werden kann. Diese Befestigung kann mittels Schraubverbindung, aber auch mittels Steckverbindung erfolgen. Dem ersten Befestigungsabschnitt des Abstützelements gegenüberliegend ist ein zweiter Befestigungsabschnitt vorgesehen, der an dem Vorbaulängsträger angeschlossen ist . Auch hier sind Steck- oder Schraubverbindungen möglich.The support element can have a fastening section with which it can be fastened to the function carrier. This attachment can be done by means of a screw connection, but also by means of a plug connection. A second fastening section is provided opposite the first fastening section of the support element and is connected to the front side member. Plug or screw connections are also possible here.
In einer Ausführungsform ist das Abstützelement ein Abstützrohr .In one embodiment, the support element is a support tube.
Eine vorteilhafte Ausgestaltungsform ist in der Zeichnung dargestellt. Dabei zeigen:An advantageous embodiment is shown in the drawing. Show:
Fig. 1 einen Vorbau eines Kraftfahrzeugs in einer Ansicht von unten und Fig. 2 eine perspektivische Ansicht eines Längsträgers gemäß Fig. 1 in einer Ansicht schräg von der Seite.1 shows a front end of a motor vehicle in a view from below and FIG. 2 shows a perspective view of a side member according to FIG. 1 in a view obliquely from the side.
Fig. 1 zeigt einen Vorbau 1 eines nicht weiter dargestellten Kraftfahrzeugs 2 in einer Ansicht von unten.Fig. 1 shows a stem 1 of a motor vehicle 2 not shown in a view from below.
Der Vorbau 1 umfasst zwei Vorbaulängsträger 3 , die zur Fahrzeuglängsachse L spiegelsymmetrisch angeordnet sind. Die Vorbaulängsträger 3 sind mit einer Stoßfängeranordnung 4 verbunden, die den Vorbau 1 vorderseitig abschließt. In ihrem hinteren Bereich können die Vorbaulängsträger 3 als Gabelträger ausgebildet sein und seitlich an den Türschweller 5 angeschlossen werden. Die Vorbaulängsträger 3 erstrecken sich im Motorraum 6 und sind durch einen Funktionsträger 7 miteinander verbunden. Der Funktionsträger 7 ist Träger des Antriebs- aggregats (nicht dargestellt) und des Fahrwerks 8 (schematisch angedeutet) .The stem 1 comprises two stem longitudinal members 3, which are arranged mirror-symmetrically to the longitudinal axis L of the vehicle. The front side members 3 are connected to a bumper arrangement 4, which closes the front end 1. In its rear area, the front side members 3 can be designed as fork supports and connected laterally to the door sill 5. The front side members 3 extend in the engine compartment 6 and are connected to one another by a functional member 7. The function carrier 7 is the carrier of the drive unit (not shown) and the chassis 8 (indicated schematically).
Wie insbesondere aus Figur 2 hervorgeht, ist der Funktionsträger 7 mittels vier Befestigungspunkten 9 an dem Vorbaulängsträger 3 gelagert. Der Vorbaulängsträger 3 ist in drei Abschnitte zu unterteilen, nämlich in einen vorderen Längsträgerabschnitt 10, einen mittleren Übergangsbereich 11 sowie einen hinteren Längsträgerabschnitt 12. Zusätzlich zu der Lagerung über die Befestigungspunkte 9 ist im hinteren Bereich des Funktionsträgers 7 jeweils ein Abstützelement 13 vorgesehen, das zum einen am Funktionsträger 7 befestigt ist und sich zum anderen am hinteren Längsträgerabschnitt 12 abstützt. Die Befestigung des Abstützelements 13 ist mittels eines Befestigungsabschnitts 14 realisiert, der so ausgestaltet ist, dass er in einen Vorsprung 15 des Funktionsträgers 7 eingreift. Dazu ist der Befestigungsabschnitt 14 ähnlich eines Gabelträgers ausgebildet . Dem Befestigungsabschnitt 14 gegenüber liegt ein zweiter Befestigungsabschnitt 16, der sich am hinteren Längsträgerabschnitt 12 abstützt. Dadurch überbrückt das Abstützelement 13 den gekröpften Übergangsbereich 11, so dass zusätzlich zum Kraftpfad über die hinteren Befestigungspunkte 9 ein weiterer Kraftpfad über das Abstützelement 13 in den hinteren Längsträgerabschnitt 12 ermöglicht ist .As can be seen in particular from FIG. 2, the function carrier 7 is mounted on the front side member 3 by means of four fastening points 9. The front side member 3 is in three Subdivide sections, namely into a front side member section 10, a central transition area 11 and a rear side member section 12. In addition to the mounting via the attachment points 9, a support element 13 is provided in the rear area of the function carrier 7, which is fastened on the one hand to the function carrier 7 and is supported on the other on the rear longitudinal beam section 12. The support element 13 is fastened by means of a fastening section 14 which is designed such that it engages in a projection 15 of the function carrier 7. For this purpose, the fastening section 14 is configured similarly to a fork carrier. A second fastening section 16 is located opposite the fastening section 14 and is supported on the rear longitudinal member section 12. As a result, the support element 13 bridges the cranked transition region 11, so that in addition to the force path via the rear fastening points 9, a further force path via the support element 13 into the rear longitudinal member section 12 is made possible.
Bei einem Frontalaufprall, der gemäß Pfeilrichtung A erfolgt, werden die Aufprallkrafte in den Vorbaulängsträger 3 bzw. den Funktionsträger 7 eingeleitet . Durch Verformung der Vorbaulängsträger 3 und ggf. durch Verformung des Funktionsträgers 7 wird Energie abgebaut, wobei über den hinteren Befestigungspunkt 9 Kräfte in den Übergangsbereich 11 eingeleitet werden. Zudem wird über das Abstützelement 13 ein weiterer Kraftpfad geöffnet, der Aufprallkräfte in den hinteren Längsträgerabschnitt 12 weiterleiten kann. Durch die rohrförmige Ausbildung des Abstützelements 13 ist dieses insbesondere zur Aufnahme großer Druckspannungen geeignet. In the event of a frontal impact, which occurs in the direction of arrow A, the impact forces are introduced into the front side member 3 or the functional member 7. Energy is dissipated by deforming the front side members 3 and possibly by deforming the functional member 7, forces being introduced into the transition region 11 via the rear fastening point 9. In addition, a further force path is opened via the support element 13, which can transmit impact forces into the rear longitudinal beam section 12. Due to the tubular design of the support element 13, this is particularly suitable for absorbing large compressive stresses.

Claims

DaimlerChrysler AGPatentansprüche DaimlerChrysler AG patent claims
1. Vorbau eines Kraftfahrzeugs mit zwei Vorbaulängsträgern, die sich im Bereich der vorderen Stirnwand mit einem Übergangsbereich vom Motorraum zur niedriger gelegenen Bodenstruktur erstrecken, und mit einem Funktionsträger, der mit wenigstens zwei hinteren Befestigungspunkten kraftübertragend am Übergangsbereich an den Vorbaulängs- trägern angeschlossen ist, d a d u r c h g e k e n n z e i c h n e t , dass ein Abstützelement (13) vorgesehen ist, das sich vom Funktionsträger (7) in Richtung Bodenstruktur erstreckt und somit Kräfte in die Bodenstruktur eingeleitet werden.1. Stem of a motor vehicle with two front side rails, which extend in the area of the front end wall with a transition area from the engine compartment to the lower floor structure, and with a function board, which is connected to the front end side members with at least two rear attachment points in a force-transmitting manner at the transition area that a support element (13) is provided which extends from the functional support (7) in the direction of the floor structure and thus forces are introduced into the floor structure.
2. Vorbau nach Anspruch 1 , d a d u r c h g e k e n n z e i c h n e t , dass das Abstützelement (13) so mit dem Übergangsbereich (11) verbunden ist, das Kräfte in die Bodenstruktur eingeleitet werden.2. Stem according to claim 1, so that the supporting element (13) is connected to the transition region (11) in such a way that forces are introduced into the floor structure.
3. Vorbau nach Anspruch 1, d a du r c h g e k e n n z e i c h n e t , dass das Abstützelement (13) mit einem Befestigungsabschnitt (14) an dem Funktionsträger befestigt ist. 3. stem according to claim 1, since you rchgek characterized in that the support element (13) with a fastening portion (14) is attached to the function carrier.
4. Vorbau nach Anspruch 3 , d a d u r c h g e k e n n z e i c h n e t , dass das Abstützelement (13) über einen zweiten Befestigungsabschnitt (16) mit dem Vorbaulängsträger (3) verbunden ist.4. stem according to claim 3, so that the supporting element (13) is connected to the stem longitudinal member (3) via a second fastening section (16).
5. Vorbau nach Anspruch 3 oder 4 , d a d u r c h g e k e n n z e i c h n e t , dass das Abstützelement (13) ein Abstützrohr ist. 5. stem according to claim 3 or 4, d a d u r c h g e k e n e z e i c h n e t that the support element (13) is a support tube.
PCT/EP2004/006770 2003-06-30 2004-06-23 Front-end of a motor vehicle WO2005000664A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10329282.9 2003-06-30
DE2003129282 DE10329282A1 (en) 2003-06-30 2003-06-30 Stem of a motor vehicle

Publications (1)

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WO2005000664A1 true WO2005000664A1 (en) 2005-01-06

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WO (1) WO2005000664A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109204486A (en) * 2017-06-30 2019-01-15 比亚迪股份有限公司 Body structure and vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009017195A1 (en) * 2009-04-09 2010-10-14 Bayerische Motoren Werke Aktiengesellschaft Motor vehicle has energy absorption unit, which is provided in front- or rear end section of motor vehicle, where energy absorption unit has two longitudinal carriers with deformation section in each case

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB827261A (en) * 1956-10-31 1960-02-03 Daimler Benz Ag Improvements relating to front suspensions for motor vehicles
EP0233505B1 (en) * 1986-02-06 1990-05-23 Audi Ag Frame arrangement, preferably for a passenger vehicle with an integral body
DE19547491C1 (en) * 1995-12-19 1997-03-06 Daimler Benz Ag Coupling device for passenger vehicle chassis
EP0861765A1 (en) * 1997-02-26 1998-09-02 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Subframe
EP1188643A1 (en) * 2000-09-19 2002-03-20 Mazda Motor Corporation Sub-frame structure of motor vehicle
EP1225072A2 (en) * 2001-01-19 2002-07-24 Nissan Motor Company, Limited Power unit layout structure
EP1314632A2 (en) * 2001-11-24 2003-05-28 Adam Opel Ag Vehicle body with axle-supporting frame
US6578904B1 (en) * 1999-11-08 2003-06-17 Renault Vehicle, in particular passenger vehicle, with impact absorbing structure avoiding overlap

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB827261A (en) * 1956-10-31 1960-02-03 Daimler Benz Ag Improvements relating to front suspensions for motor vehicles
EP0233505B1 (en) * 1986-02-06 1990-05-23 Audi Ag Frame arrangement, preferably for a passenger vehicle with an integral body
DE19547491C1 (en) * 1995-12-19 1997-03-06 Daimler Benz Ag Coupling device for passenger vehicle chassis
EP0861765A1 (en) * 1997-02-26 1998-09-02 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Subframe
US6578904B1 (en) * 1999-11-08 2003-06-17 Renault Vehicle, in particular passenger vehicle, with impact absorbing structure avoiding overlap
EP1188643A1 (en) * 2000-09-19 2002-03-20 Mazda Motor Corporation Sub-frame structure of motor vehicle
EP1225072A2 (en) * 2001-01-19 2002-07-24 Nissan Motor Company, Limited Power unit layout structure
EP1314632A2 (en) * 2001-11-24 2003-05-28 Adam Opel Ag Vehicle body with axle-supporting frame

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109204486A (en) * 2017-06-30 2019-01-15 比亚迪股份有限公司 Body structure and vehicle
CN109204486B (en) * 2017-06-30 2020-11-20 比亚迪股份有限公司 Vehicle body structure and vehicle

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