Support structure for vehicles, made from hollow steel sections
The invention relates to a support structure for vehicles, made from a longitudinal member ( 1 ) comprising at least two interconnected hollow sections ( 10, 11 ). One of the hollow sections continues in the direction of the bumper ( 5 ). In the case of a crash with low-speed impact, there is a targeted deformation of the single hollow section ( 10 c ), which makes it possible to carry out repairs economically. In the case of a higher-speed impact, the more rigid support structure of the double hollow section for protecting passengers comes into play. Since in this design the impact absorber, which is usually arranged between the longitudinal member and the bumper, can be done without, there is also a reduction in the number of components required, and thus in the overall weight.
1. A support structure for vehicles, made from steel sections, comprising a longitudinal member made from at least two hollow sections which are interconnected in parallel, wherein said hollow sections, in a front of the support structure of a passenger compartment, bifurcate into a first hollow section supported by a lateral sill of the support structure of the passenger compartment, and a second hollow section supported by other parts of the support structure of the passenger compartment, wherein only one of the at least two hollow sections of the longitudinal member continues in the shape of a single hollow section in the direction of a bumper.
2. The support structure according to claim 1 , wherein the second hollow section is supported by a tunnel reinforcement of the support structure.
3. The support structure according to claim 1 , wherein the hollow sections are integrally interconnected in longitudinal direction.
4. The support structure according to claim 3 , wherein the integral connection is achieved by means of a weld seam.
5. The support structure according to claim 4 , wherein the weld seam is a stepped weld seam.
6. The support structure according to claim 4 , wherein one of the two hollow sections, in the region of the weld seam, is partially designed as a U-section.
7. The support structure according to claim 1 , wherein the hollow sections comprise a polygonal cross-section, wherein the two hollow sections rest against each other on a flat side.
8. The support structure according to claim 1 , wherein the longitudinal member is comprised of hollow sections of different cross-sections.
9. The support structure according to claim 1 , wherein the cross-section of at least one of the hollow sections changes in longitudinal direction.
10. The support structure according to claim 1 , wherein at least one of the hollow sections is made from a tailored blank.
11. The support structure according to claim 9 , wherein the hollow sections comprise various steel grades.
12. The support structure according to claim 9 , wherein the materials of the hollow sections vary.
13. The support structure according to claim 1 , wherein at least one of the hollow sections is made from a flexibly rolled sheet.