US 12,319,217 B2
Bumper crossbeam for a motor vehicle
Marco Töller, Cologne (DE); Alexander Günther, Olpe (DE); Lena Kremer, Finnentrop (DE); and Maria Schmitt, Attendorn (DE)
Assigned to Kirchhoff Automotive Deutschland GmbH, Attendorn (DE)
Appl. No. 17/639,970
Filed by Kirchhoff Automotive Deutschland GmbH, Attendorn (DE)
PCT Filed Sep. 3, 2020, PCT No. PCT/EP2020/074585
§ 371(c)(1), (2) Date Mar. 3, 2022,
PCT Pub. No. WO2021/043896, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 10 2019 124 019.0 (DE), filed on Sep. 6, 2019; and application No. 10 2019 124 020.4 (DE), filed on Sep. 6, 2019.
Prior Publication US 2022/0314912 A1, Oct. 6, 2022
Int. Cl. B60R 19/34 (2006.01); B60R 19/02 (2006.01); B60R 19/18 (2006.01)
CPC B60R 19/34 (2013.01) [B60R 19/023 (2013.01); B60R 19/18 (2013.01); B60R 2019/1813 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A bumper crossmember for a motor vehicle, wherein an x-direction corresponds to a longitudinal extension of the vehicle, a y-direction corresponds to a transverse extension of the vehicle, and a z-direction corresponds to a vertical direction, the bumper crossmember comprising:
a crossmember extending in the y-direction and two crashboxes connected thereto in respective end sections of the crossmember, wherein each crashbox has an end connected to the crossmember and an opposite end configured to be connected to a structural component of the vehicle, and wherein, on the end connected to the crossmember, each crashbox has an end face facing the crossmember with an upper end-face area, a lower end-face area, and two lateral end-face areas,
wherein the crashboxes are supported with the end faces thereof only in sections on a rear side of the crossmember, such that support is continuous or at least substantially continuous either in the upper and lower end-face areas or in the two lateral end-face areas, while support of the respective other end-face areas is absent or provided only in sections, and wherein the end-face areas of the crashboxes not supported on the rear side of the crossmember are positioned from the rear side of the crossmember such that each end face is fully supported on the rear side of the crossmember only after a first phase of energy absorption with deformation of the respective crashbox,
wherein the upper and lower end-face areas of the crashboxes are continuously or at least substantially continuously supported on the rear side of the crossmember, while the two lateral end-face areas are unsupported or supported only in sections on the rear side of the crossmember.