Bumper for a motor vehicle

Patent metadata

Field	Value
Publication number	US-9586545-B2
Application number	US-201414778579-A
Country	US
Kind code	B2
Filing date	Feb 14, 2014
Priority date	Mar 19, 2013
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

The invention relates to a bumper for a motor vehicle, in particular a front bumper, having at least two deformation bodies which are at a distance from one another and of which the center or longitudinal axes, in the mounted state, are oriented substantially parallel to the direction of travel of the motor vehicle, and having a plurality of crossmembers which have a closed profile and which are arranged one above the other and are connected to the deformation bodies. The crossmembers are formed from a group of at least three crossmembers, wherein the respective crossmember of the group has a cross-sectional profile which comprises at least five corners.

First claim

The invention claimed is:

1. A bumper for a motor vehicle, comprising:
at least a first and a second steel deformation body, each having a longitudinal axis, said first and second deformation bodies being spaced apart from one another and configured to be mounted to the motor vehicle such that said longitudinal axes of said respective first and second deformation bodies are oriented substantially parallel to a direction of travel of the motor vehicle;
at least three steel crossmembers defining a first group of crossmembers, each of said at least three crossmembers having a closed profile and a cross-sectional shape that comprises at least six corners, said at least three cross members being disposed one above the other and coupled to said at least two deformation bodies.

2. The bumper of claim 1 , wherein the cross-sectional shape of said cross members has an even number of corners.

3. The bumper of claim 1 , wherein the cross-sectional shape of said cross members is octagonal.

4. The bumper of claim 1 , further comprising:
a plurality of additional crossmembers defining a second group of crossmembers, said additional crossmembers being disposed at least one of in front of or behind said first group of cross members.

5. The bumper of claim 1 , wherein each of said crossmembers in said first group and said second group are made of steel, and each has a tensile strength of at least 780 MPa.

6. The bumper of claim 1 , wherein at least one of said crossmembers in said first group or said second group are made of steel having a tensile strength of at least 1,200 MPa.

7. The bumper of claim 1 , wherein each of said cross members has a first end and an opposing second end that is distal from said first end, wherein each of said first and second deformation bodies has an outer side facing away from said respective other deformation body, and wherein said first end of at least an uppermost crossmember in said first group is aligned with said outer side of said first deformation body, and wherein said second end of at least said uppermost crossmember in said first group is aligned with said outer side of said second deformation body.

8. The bumper of claim 1 , wherein at least one of a deformation resistance or a tensile strength of said crossmembers in said first group decreases in steps from an uppermost crossmember to a lowermost crossmember.

9. The bumper of claim 1 , wherein a deformation resistance of each of an uppermost crossmember and a lowermost crossmember in said first group of cross members is greater than the deformation resistance of a crossmember disposed there between.

10. The bumper of claim 1 , wherein at least two of the three crossmembers are at least locally coupled to each other at a location disposed between said first and second deformation bodies.

Assignees

• Thyssenkrupp Steel Europe Ag

Inventors

• Kibben Martin
• Röttger Rolf Peter
• Zörnack Markus

Classifications

• B60R19/03

  characterised by material, e.g. composite (B60R19/18 takes precedence) · CPC title

• B60R19/34

  destroyed upon impact, e.g. one-shot type · CPC title

• B60R19/18

  {characterised by the cross-section;} Means within the bumper to absorb impact · CPC title

• B60R19/12 Primary

  vertically spaced · CPC title

• B60R2019/1826

  of high-tension steel · CPC title