Vehicle body

摘要

In a floor cross member configured by a web surface (4a) as the top surface, a ridge part (4b) contiguous to the web surface (4a), and a vertical wall surface (4c) contiguous to the ridge part (4b), having a tensile strength of 440 MPa or larger, flanges (4e) are formed at both longitudinal ends continuously around at least the web surface (4a), the ridge part (4b) and the vertical wall surface (4c), and the floor cross member (4) is connected through the flanges (4e) to a tunnel part (2a) and to a side sill (3). The flange (4e) has a flange width lfc, at the center in the perimeter direction of the curved part (4e-2), not smaller than the minimum flange width lfs of the curved part (4e-2). Accordingly, a vehicle body, which is suppressed in deformation of the floor cross member (4) and improved in the torsional rigidity, is successfully provided.

主权项

1. A vehicle body comprising a longitudinal member disposed as aligned in the front-back direction of the vehicle body, and a widthwise member disposed as aligned in the widthwise direction of the vehicle body,
the widthwise member having at least a web surface which configures the top surface, a ridge part contiguous to the web surface, and a vertical wall surface contiguous to the ridge part, the widthwise member having a flange formed at a longitudinal end continuously around at least the web surface, the ridge part and the vertical wall surface, and being connected through the flange to the longitudinal member, the flange having a flange width lfc, at a center in a perimeter direction of a curved part thereof, being not smaller than a minimum flange width lfs in a region excluding the center in the perimeter direction of the curved part, and the widthwise member having a tensile strength of 440 MPa or larger.