Vehicle underbody structure for vehicle

摘要

A rear frame (11) includes: a first inclined part (11A) having a rearward rising incline, a trailing arm attachment part (11B) extending horizontally at the rear side of the first inclined part (11A), and a second inclined part (11C) having a rearward rising incline at the rear side of the trailing arm attachment part (11B). An upward-convex first protrusion (41), in which at least a portion of the front end section of a trailing arm (21) is accommodated, is formed in the trailing arm attachment part (11B), a downward-convex second protrusion (42) is formed in the front section of the first inclined part (11A), and the first protrusion (41) and the second protrusion (42) are disposed so as to mutually overlap in the vehicle width direction.

主权项

1. A vehicle underbody structure for a vehicle, comprising:
a floor panel; a left/right pair of floor frames joined to a lower surface of the floor panel and extending in a front/rear direction of a vehicle body; a left/right pair of rear frames joined to the lower surface of the floor panel at the rear side of the floor frames and extending in the front/rear direction of the vehicle body; and a rear wheel suspension having a trailing arm, wherein the rear frames each include: a first inclined part having a rearward rising incline; a trailing arm attachment part extending horizontally at the rear side of the first inclined part; and a second inclined part having a rearward rising incline at the rear side of the trailing arm attachment part, an upward-convex first protrusion, in which at least a portion of a front end section of the trailing arm is accommodated, is formed in the trailing arm attachment part, a downward-convex second protrusion is formed in a front section of the first inclined part, and the first protrusion and the second protrusion are disposed so as to mutually overlap in a vehicle width direction.