Vehicle lower section structure

摘要

A vehicle lower section structure is obtained that has a simple structure and is capable of increasing the rigidity and strength of a framework structure that is long in the vehicle front-rear direction. A vehicle lower section structure includes: an upper panel including a pair of respectively vehicle-downwards facing joining faces that are separated from each other in the vehicle width direction; a lower panel that with the upper panel configures a framework structure that is long in the vehicle front-rear direction and has a closed cross-section by the joining faces of the upper panel being joined to vehicle-upwards facing joining faces of the lower panel; and a seat rail that is long in the vehicle front-rear direction and is fixed to a portion of the upper panel that configures an upper wall of the closed cross-section of the framework structure.

主权项

1. A vehicle lower section structure comprising:
an upper panel comprising;
an upper wall; anda pair of joining faces that respectively face downward in a vehicle vertical direction and that are separated from each other in a vehicle width direction; a lower panel including a lower wall and joining faces that face upward in the vehicle vertical direction; and one or more seat rails that extend in the vehicle front-rear direction and are fixed to a portion of the upper panel, wherein the upper panel and the lower panel comprise a framework structure that is long in a vehicle front-rear direction and has a closed cross-section by each of the joining faces of the upper panel being respectively joined to the joining faces of the lower panel, and the portion of the upper panel forms an upper wall of the framework structure, wherein the upper panel or the lower panel or both the upper panel and the lower panel extend in the vehicle width direction and configure at least a portion of a vehicle floor, wherein the upper panel and the lower panel extend from a dashboard lower portion that is a front end portion of the vehicle floor to a lower back portion that is a rear end portion of the vehicle floor, wherein the framework structure comprises:
a rocker positioned at an outer edge side in the vehicle width direction of the vehicle floor; anda center framework portion positioned at a center portion of the vehicle floor in the vehicle width direction, wherein a seat rail at the outer edge side in the vehicle width direction is fixed to the upper wall of the framework structure that defines a closed cross-section of the rocker, and a seat rail at the center portion of the vehicle floor in the vehicle width direction is fixed to the upper wall of the framework structure that defines the closed cross-section of the center framework portion, wherein an upper wall of the rocker is formed by the upper panel and a lower wall of the rocker is formed by the lower panel, and wherein the rocker comprises side walls that extend between the upper wall and the lower wall thereof, the side walls being inclined relative to a vertical direction of a vehicle.