Vehicle body structure for automobile

摘要

Upon a rear-end collision of a vehicle, an arm section(s) of a cross member of a rear suspension member on the rear side of the vehicle, which is(are) positioned in a low-strength region in a vehicle-body strength distribution, undergoes crush deformation together with a corresponding rear side member(s). Deformation of the part of the rear suspension member other than the arm sections, which is positioned in a high-strength region in the vehicle-body strength distribution, is suppressed, so that a high voltage component mounted in the high-strength region is protected.

主权项

1. A vehicle body structure for an automobile comprising:
a suspension member arranged horizontally on a lower side of a front or a rear of a vehicle body and supporting a wheel, wherein the suspension member is formed in a rectangular frame shape in a plan view by including a pair of left and right side members extending in a vehicle front-rear direction and a pair of front and rear cross members joining the pair of side members to each other, at least the cross member on an end side of the vehicle body includes arm sections extending obliquely outward in a vehicle width direction toward the end side of the vehicle body from portions of the cross member on the end side of the vehicle body linked to the side members, and fastened at end portions thereof to vehicle-body-side members, strength of the arm sections is set lower than strength of the remaining part of the suspension member, and a vehicle-body strength distribution in an area where the suspension member is arranged is set such that a low-strength region and a high-strength region sequentially appear from the end side of the vehicle body, and a high voltage component is mounted on the suspension member on a center side of the vehicle body relative to a base portion of the arm section in an extending direction thereof and in the high-strength region in the vehicle-body strength distribution.