VEHICLE BODY FRONT PORTION STRUCTURE

摘要

The present disclosure provides a vehicle body front portion structure including: a front side member main body to which a bead is formed at rear portion of an outer-side side wall portion, and is joined to a front side member base portion such that the front side member base portion covers a portion of an outer circumferential surface of the front side member main body located at vehicle body rear side of the bead. Abutting ribs extending in vehicle body front-rear direction are provided at a portion of the front side member base portion. The abutting ribs include a front-side extended portion located at a side portion of the bead and extends towards vehicle body front side beyond a portion that protrudes in vehicle body transverse direction, and include an abutting portion that faces towards vehicle body front side.

主权项

1. A vehicle body front portion structure, comprising:
a front side member main body portion formed of aluminum, an aluminum alloy, magnesium, or a magnesium alloy, the front side member main body portion having a left side wall portion and a right side wall portion that extend in a vehicle body front-rear direction at side portions of a vehicle body front portion, and having a bend starting portion formed at a rear portion of one side wall portion of the left side wall portion or the right side wall portion, the bend starting portion forming a starting portion of a bend in a vehicle body transverse direction in a case in which a load is input from a vehicle body front side; a front side member base portion formed of aluminum, an aluminum alloy, magnesium, or a magnesium alloy, the front side member base portion being joined to a dash panel, and being joined to the front side member main body panel at portions located further to a vehicle body rear side than the bend starting portion so as to cover an external surface including at least the left side wall portion and the right side wall portion; and ribs protruding toward an opposite side in the vehicle body transverse direction from the side at which the one side wall portion is located and extending in the vehicle body front-rear direction, the ribs being provided at a facing portion of the front side member base portion that faces the one side wall portion or at a location to the vehicle body rear side of the facing portion, each of the ribs having a front-side extended portion that extends to the vehicle body front side beyond a portion that protrudes in the vehicle body transverse direction and that is positioned on a side of the bend starting portion, and each of the ribs having, at a front end, an abutting portion that, in a case in which the front side member main body portion is bent in the vehicle transverse direction with the bend starting portion forming a starting portion in response to a load being input from the vehicle body front side, abuts against the front side member main body portion.