Motor vehicle body designed for a collision with small overlap
View Patent ↗A motor vehicle body includes a longitudinal beam, a bumper cross member, which is fixed to one end of the longitudinal beam, wherein an end section of the bumper cross member protrudes over the longitudinal beam in the transverse direction, and a cantilever beam, which protrudes into a space between a wheel mount and the bumper cross member. The cantilever beam and the end section of the bumper cross member are disposed so as to cooperate with each other such that, during a frontal collision, in particular during a frontal collision with small overlap, the end section of the bumper cross member deformed by the frontal collision impacts an end face of the cantilever beam and can be supported at this end face so that further deformation of the end section of the bumper cross member is prevented.
1. A motor vehicle body, comprising:
a longitudinal beam;
a bumper cross member, which is fixed to one end of the longitudinal beam, wherein an end section of the bumper cross member protrudes over the longitudinal beam in a transverse direction; and
a cantilever beam torsionally, rigidly connected to the longitudinal beam, which protrudes into a space between a wheel mount and the bumper cross member, wherein
the cantilever beam extends obliquely forward from the longitudinal beam between a transverse vehicle direction and a longitudinal vehicle direction,
the cantilever beam is provided at an angle of 35° to 55° with respect to the longitudinal beam,
the end section of the bumper cross member is bent toward the cantilever beam,
the cantilever beam and the end section of the bumper cross member are disposed so as to cooperate with each other such that, during a frontal collision with small overlap, the end section of the bumper cross member deformed by the frontal collision impacts an end face of the obliquely extending cantilever beam and is supportable at the end face so that further deformation of the end section of the bumper cross member is prevented, and
the end section of the bumper cross member and the end face of the cantilever beam cooperate during the frontal collision in such a way that frontal collision forces are laterally deflected.
2. The motor vehicle body according to claim 1 , wherein
the cantilever beam is provided at an angle of approximately 45° with respect to the longitudinal beam.
3. The motor vehicle body according to claim 1 , wherein
the cantilever beam, the longitudinal beam and the bumper cross member are located substantially in one plane.
4. The motor vehicle body according to claim 3 , wherein the one plane is a plane parallel to the longitudinal axis and the transverse axis of the motor vehicle body.
5. The motor vehicle body according to claim 1 , further comprising:
a second longitudinal beam; and
a second cantilever beam, wherein
the first and second longitudinal beams form left and right longitudinal beams, respectively, and the first and second cantilever beams form left and right cantilever beams, respectively,
the bumper cross member is fixed to front ends of the left and right longitudinal beams and protrudes over the left and right longitudinal beams, and
the left and right cantilever beams are supported on both the left and right longitudinal beams.
6. The motor vehicle body according to claim 5 , wherein one or more of the longitudinal beams, the bumper cross member or the cantilever beams are made of aluminum.
7. The motor vehicle body according to claim 1 , wherein one or more of the longitudinal beam, the bumper cross member or the cantilever beam are made of aluminum.
8. The motor vehicle body according to claim 1 , further comprising:
a support beam provided on another side of the wheel mount from the cantilever beam, wherein
the support beam is configured such that a load of the frontal collision transmitted via a wheel is absorbable by the support beam and the support beam functions to move the wheel in the transverse direction during the frontal collision.
9. The motor vehicle body according to claim 8 , wherein the support beam has a chamfered sliding surface configured to move the wheel in the transverse direction.
10. The motor vehicle body according to claim 8 , wherein the support beam is fixed to the longitudinal beam or a second longitudinal beam.
11. The motor vehicle body according to claim 8 , further comprising a car jack receiving element provided on the support beam.
12. The motor vehicle body according to claim 1 , wherein
the end section of the bumper cross member is configured to have a hollow profile; and
a profile reinforcement is arranged in the hollow profile.
13. The motor vehicle body according to claim 12 , wherein the profile reinforcement is disposed only in a region of the end section of the bumper cross member that impacts the end face of the cantilever beam in an event of the frontal collision with small overlap.
14. The motor vehicle body according to claim 13 , wherein the profile reinforcement is configured so as not to be deformed by the frontal collision with small overlap.
15. The motor vehicle body according to claim 12 , wherein the profile reinforcement is made of a plastic material.
16. The motor vehicle body according to claim 15 , wherein the plastic material is a foamed plastic material.
17. The motor vehicle according to claim 12 , wherein the profile reinforcement is a metal extruded profile element, an extrusion direction of the profile element forming a main load direction of the frontal collision with small overlap.