Vehicle rear portion structure
A vehicle rear portion structure including: a spare tire house; a front side reinforcing portion provided at a bottom wall portion of the spare tire house, the front side reinforcing portion reinforcing the bottom wall portion and structuring a first high rigidity portion; a rear side reinforcing portion provided at the bottom wall portion so as to include a lower wall portion that extends in a vehicle longitudinal direction, the rear side reinforcing portion being disposed at a vehicle rear upper side of the front side reinforcing portion, reinforcing the bottom wall portion, and structuring a second high rigidity portion, and a low rigidity portion provided between the first high rigidity portion and the second high rigidity portion, and a rigidity of the low rigidity portion being set to be lower than rigidities of the first high rigidity portion and the second high rigidity portion.
1. A vehicle rear portion structure comprising:
a spare tire house, the spare tire house being formed at a rear floor panel structuring a vehicle body rear portion, and in the spare tire house a spare tire being accommodated;
a front side reinforcing portion, the front side reinforcing portion being provided at a bottom wall portion of the spare tire house, the front side reinforcing portion reinforcing the bottom wall portion, and the front side reinforcing portion structuring a first high rigidity portion;
a rear side reinforcing portion, the rear side reinforcing portion being provided at the bottom wall portion so as to include a lower wall portion that extends in a vehicle longitudinal direction, the rear side reinforcing portion being disposed at a vehicle rear upper side of the front side reinforcing portion, the rear side reinforcing portion reinforcing the bottom wall portion, and the rear side reinforcing portion structuring a second high rigidity portion; and
a low rigidity portion, the low rigidity portion being provided between the first high rigidity portion and the second high rigidity portion, and a rigidity of the low rigidity portion being set to be lower than rigidities of the first high rigidity portion and the second high rigidity portion,
wherein a rear bumper reinforcement that extends in a vehicle transverse direction is disposed at a vehicle rear side of the rear side reinforcing portion, at a position that overlaps the rear side reinforcing portion as seen in the vehicle longitudinal direction.
2. The vehicle rear portion structure of claim 1 , wherein the rear side reinforcing portion extends to a vehicle rear side end portion of the spare tire house, and a vehicle rear side end portion of the rear side reinforcing portion is positioned further toward a vehicle rear side than vehicle rear side end portions of rear side members that extend along peripheral edge portions in a vehicle transverse direction at both sides of the rear floor panel.
3. The vehicle rear portion structure of claim 1 , wherein the low rigidity portion is disposed at a vehicle rear side of a fixed position where the spare tire is fixed to the bottom wall portion.