DE102018003128A1 - Body structure and motor vehicle - Google Patents

Abstract

A body structure (8, 10) for a motor vehicle (2) with a third row of seats (4) is described, wherein the body structure (8, 10) has a floor panel (8) and a vehicle longitudinal member (10) attached thereto, wherein the vehicle longitudinal member ( 10) is provided for arrangement below the third row of seats (4), wherein the body structure (8, 10) is designed for specific deformation in the event of a crash, wherein the body structure (8, 10) in a region in the vehicle longitudinal direction (X) behind the third Seat row (4) has a predetermined bending point (14, 16) which is designed so that the motor vehicle side member (10) bends in the event of a crash in the vehicle vertical direction (Z) upwards.

Description

Described are a body structure and a motor vehicle.

Crash safety is one of the most important aspects in the construction of motor vehicles. How safe a motor vehicle is in an accident is determined primarily by the body of the motor vehicle. The body is designed so that on the one hand as long as possible a survival space for the occupants ensures and on the other hand selectively deformed to absorb energy and to reduce the accelerations acting on the occupants in the so-called crumple zones. In collisions from the front or from the rear, a significant part of the impact energy is passed over the longitudinal members of the motor vehicle.

From the DE 101 21 353 A1 is a Wagenendbereich for a motor vehicle with an arranged between the longitudinal members drive unit with motor and gearbox known, wherein the longitudinal members have at least one shape-related, forming in a crash load kink and a support member.

From the DE 10 2009 022 935 A1 a device for the targeted deformation of longitudinal members of motor vehicles is known, wherein the longitudinal members are formed from a hollow profile with at least sections beads, wherein the device consists of at least one in the hollow profile indessen longitudinal direction and longitudinally adjustable longitudinal force transmission member, at least one with a associated beading connected transverse force transmission part is attached so that a directed in the hollow profile transverse direction adjustable biasing force can be brought by a longitudinal adjustment of the longitudinal force transmission part, by the bias and / or the shape of the bead is adjustable.

A disadvantage of the solutions of the prior art that support elements or power transmission parts are required.

Thus, the task of body structures for a motor vehicle of the type mentioned in such a way that a targeted deformation due to the structure of the body structure can be achieved.

The object is achieved by a body structure for a motor vehicle according to claim 1 and a motor vehicle according to the independent claim 7. Further developments and further developments are the subject of the dependent claims.

Hereinafter, a body structure for a motor vehicle with a third row of seats is described, wherein the body structure has a floor panel and an attached vehicle longitudinal member, the vehicle longitudinal member is provided for arrangement below the third row of seats, the body structure is designed for certain deformation in the event of a crash, the Body structure in an area in the vehicle longitudinal direction behind the third row of seats has a predetermined kink, which is designed so that the vehicle longitudinal member bends in the vertical direction in the vehicle vertical upward in the event of a crash.

In this way it can be achieved that the passengers of the third row of seats are better protected, since the connection of the seat in the third row of seats is not so heavily loaded by the predetermined kink in the event of a crash and thus remains more stable. In addition, it is achieved by bending the vehicle longitudinal member upwards that the barrier involved in the collision, for example a motor vehicle starting from behind, can not penetrate too deeply into the motor vehicle structure, since the motor vehicle longitudinal member forms a kind of cage for the third row of seats.

In a first further embodiment, it may be provided that the predetermined bending point is formed as a weakening in the vehicle longitudinal member and / or in the floor panel. This makes it possible to dispense with further devices for achieving the desired bending of the motor vehicle longitudinal member.

In another further embodiment, it can be provided that the predetermined bending point has a bead in the bottom plate. The bead can act as a hinge around which the motor vehicle side member is pivoted in the event of a crash.

In another further embodiment, it can be provided that the predetermined bending point has a recess in the motor vehicle longitudinal member and / or in the floor panel. A recess weakens the structure of the vehicle longitudinal member specifically and thus allows bending in the region of the recess.

In another further embodiment, it can be provided that the recess in the vehicle longitudinal direction is arranged at the level of the bead. This ensures that the vehicle longitudinal member bends upwards.

In another further embodiment, it can be provided that the recess is designed as a cutout on a flange of the motor vehicle longitudinal member. Such a flange is used for connection to a floor panel.

A first independent article relates to a motor vehicle having a body structure of the type described above.

A first further embodiment provides that the motor vehicle side member is fixed to the floor panel.

Further advantages, features and details will become apparent from the following description in which - where appropriate, with reference to the drawings - at least one embodiment is described in detail. The same, similar and / or functionally identical parts are provided with the same reference numerals.

• 1 eine Ansicht von schräg oben auf einen Abschnitt eines Kraftfahrzeugs im Bereich einer dritten Sitzreihe;
• 2 eine Schnittdarstellung des Kraftfahrzeugs aus 1 im Bereich der dritten Sitzreihe;
• 3 eine Ansicht des Kraftfahrzeugs von hinten;
• 4 eine Vergrößerung eines Abschnitts aus 3;
• 5 eine Schnittdarstellung durch das Kraftfahrzeug nach einem Heckaufprall, sowie
• 6 eine Vergrößerung eines Abschnitts aus 5.

They show schematically:

• 1 a view obliquely from above of a portion of a motor vehicle in the region of a third row of seats;
• 2 a sectional view of the motor vehicle 1 in the area of the third row of seats;
• 3 a view of the motor vehicle from behind;
• 4 an enlargement of a section 3 ;
• 5 a sectional view of the motor vehicle after a rear impact, and
• 6 an enlargement of a section 5 ,

1 shows a view obliquely from above of a portion of a motor vehicle 2 in the area of a third row of seats 4 ,

The third row of seats 4 is with a seat rail 6 on a floor plate 8th assembled.

Below the bottom plate 8th is a motor vehicle sidecar 10 intended. The vehicle longitudinal member 10 has a substantially U-shaped contour and is by means of a flange 12 with the floor panel 8th connected.

The floor panel 8th has a bead 14 on. In vehicle longitudinal direction X at the same height is next to the bead 14 a free cut 16 in floor pan 8th and vehicle longitudinal members 10 intended. The bead 14 forms in case of overload a joint and the free punch 16 a structural weakening of the vehicle longitudinal member 10 , In combination, a predetermined bending point is thus created, which is the vehicle longitudinal member 10 and thus also the bottom plate 8 in the vehicle vertical direction Z let it bend upwards.

2 shows a sectional view of the motor vehicle 2 in the area of the third row of seats 4 ,

Here is the U-shaped profile 18 of the vehicle longitudinal member 10 better to recognize than in 1 ,

3 shows a view of the motor vehicle 2 from behind.

The behind a second row of seats 20 located third row of seats 18 is located very far in the rear 22 of the motor vehicle 2 ,

4 shows an enlargement of a section 3 ,

The floor panel 8th is shown partially transparent, so that the U-profile 18 is recognizable.

Beading 14 and free cut 16 are in the vehicle longitudinal direction X arranged side by side.

5 shows a sectional view through the motor vehicle 2 after a rear impact.

The image comes from a computer simulation of a barrier impact on the stern 22 of the motor vehicle 2 at high speed.

The rear part of the vehicle longitudinal member 10 is bent upwards and thus protects the third row of seats 4 in which he forms a barrier against a deeper intrusion. In addition, the attachment of the seat rail 6 Relieves what the risk of detachment of the third row of seats 4 reduced.

6 shows an enlargement of a section 2 ,

The kinking of the vehicle longitudinal member 10 happens at the location of the flange 12 and free-cutting 16 ,

Although the invention has been further illustrated and explained in detail by way of preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention. It is therefore clear that a multitude of possible variations exists. It is also to be understood that exemplified embodiments are really only examples that are not to be construed in any way as limiting the scope, applicability, or configuration of the invention. On the contrary, the preceding description and the description of the figures enable the person skilled in the art to concretely implement the exemplary embodiments, the person skilled in the art, having knowledge of the art disclosed inventive concept can make various changes, for example, in terms of the function or the arrangement of individual, mentioned in an exemplary embodiment elements, without departing from the scope defined by the claims and their legal equivalents, such as further explanation in the description.

LIST OF REFERENCE NUMBERS

2

motor vehicle

4

third row of seats

6

seat rail

8th

floor panel

10

Motor vehicle longitudinal beams

12

flange

14

Beading

16

Clear cut

18

U-profile

20

second row of seats

22

Rear

X

Vehicle longitudinal direction

Z

Vehicle vertical direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10121353 A1 [0003]
• DE 102009022935 A1 [0004]

Claims (8)

Body structure for a motor vehicle (2) with a third row of seats (4), wherein the body structure (8, 10) has a floor panel (8) and an attached vehicle longitudinal member (10), wherein the motor vehicle side member (10) for arrangement below the third row of seats (4) is provided, wherein the body structure (8, 10) is designed for certain deformation in the event of a crash, characterized in that the body structure (8, 10) in an area in the vehicle longitudinal direction (X) behind the third row of seats (4) Sollknickstelle (14, 16) which is designed so that the motor vehicle side member (10) bends in the event of a crash in the vehicle vertical direction (Z) upwards. Body structure after Claim 1 , characterized in that the predetermined bending point (14, 16) is designed as a weakening in the motor vehicle longitudinal member (10). Body structure, according to one of Claims 1 or 2 , characterized in that the predetermined bending point (14, 16) has a bead (14) in the bottom plate (8). Body structure according to one of the preceding claims, characterized in that the predetermined bending point (14, 16) has a recess (16) in the motor vehicle longitudinal member (10) and / or in the floor panel (8). Body structure after Claim 4 , characterized in that the recess (16) in the vehicle longitudinal direction (X) at the height of the bead (14) is arranged. Body structure after Claim 5 , characterized in that the recess as a free cut (16) on a flange (12) of the motor vehicle longitudinal member (10) is formed. Motor vehicle with a body structure (8, 10) according to one of the preceding claims. Motor vehicle after Claim 7 , characterized in that the motor vehicle side member (10) is fixed to the floor panel (8).

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