| 摘要 |
A vehicle floor underframe 5, which is arranged under a cab, includes: a front section 11, which is deployed on the front side of the cab and extends along the length of the vehicle; a rising section 12, which bends at the back end of the front section 11 and extends upward; a back section 13, which bends at the top end of the rising section 12 and extends towards the rear of the vehicle and is deployed under a passenger seat 7; and a buckling section 14, which is formed in the back section 13 and has stress concentration when a load from at least either the front end of the front section 11 or the back end of the back section 13 is applied in a compressing direction. The buckling section 14 is deployed under approximately the center of the passenger seat 7 along the length of the vehicle. The back section 13 bends and deforms upwards at the buckling section 14 when a load is applied from at least either the front end of the front section 11 or the back end of the back section 13 in a compressing direction. |
