| 摘要 |
Disclosed is an underbody structure for an automobile, which comprises a pair of laterally-spaced floor frames 10 disposed to extend longitudinally in such a manner as to interpose a tunnel region 6 therebetween and joined to a bottom surface of a front floor portion 2 . Each of the floor frames 10 has a rear end located in the vicinity of a rear kick-up portion 3 extending upward from a rear end of the front floor portion 2 . The rear kick-up portion 3 and each rear end region of the floor frames 10 are connected to one another from the exterior side of the automobile through an end gusset 45 ( 47, 48 ). The end gusset 45 ( 47, 48 ) may be designed to define a closed section in cooperation with the rear kick-up portion 3 , or to extend laterally outward so as to be connected to a front end region of a rear frame 17 . The underbody structure of the present invention can prevent or suppress a rearward movement of each rear end of the floor frames during a head-on collision.
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