| 摘要 |
In a frontal vehicle collision, an orthogonal cross-section of a crash box, taken orthogonally to the vehicle front-rear direction, deforms into a hexagonal shape. Due to this deformation of the orthogonal cross-section, new ridge lines are formed at an upper face portion and a lower face portion, running from the vicinity of both end portions in a vehicle width direction of vehicle rear end portions to the vicinity of both end portions in the vehicle width direction of respective join portions S. The strength of the crash box in the vehicle front-rear direction increases due to the increased number of ridge lines in the vehicle front-rear direction (axial direction). Load generated during crushing of the crash box in the vehicle front-rear direction therefore increases, as a result of which the energy absorption amount of the crash box increases. Namely, the impact absorption performance of the crash box is improved. |
| 主权项 |
1. A vehicle end section structure comprising:
a bumper reinforcement disposed running along a vehicle width direction at an end section in a front-rear direction of a vehicle; framework members disposed running along the vehicle front-rear direction at lower portions on both sides in the vehicle width direction; an impact absorbing member that is provided between the bumper reinforcement and each framework member, and that is crushed in the vehicle front-rear direction by collision load input from the bumper reinforcement;
an upper side extension portion that extends from an upper portion of the bumper reinforcement toward a side of the impact absorbing member, and that is joined to an end portion of an upper face portion of the impact absorbing member over a joint width narrower than a width of the end portion in the vehicle width direction of the upper face portion of the impact absorbing member; anda lower side extension portion that extends from a lower portion of the bumper reinforcement toward the side of the impact absorbing member, and that is joined to an end portion of a lower face portion of the impact absorbing member over a joint width narrower than a width of the end portion in the vehicle width direction of the lower face portion of the impact absorbing member,wherein an external profile of the impact absorbing member, in an orthogonal cross-section taken orthogonally to the vehicle front-rear direction, is a substantially rectangular shape, and at least a portion of respective side wall protions provided between the upper face portion and the lower face portion is configured by overlapping and joining together a plurality of plate members, andwherein, in the orthogonal cross-section, the impact absorbing member comprises an upper side plate portion configuring upper portions of the side wall portions, and configuring the upper face portion; a lower side plate portion configuring lower portions of the side wall portions, and configuring the lower face portion; side plate portions, each of which overlaps from either an inside or an outside with either one of the upper portions of the side wall portions and either one of the lower portions of the side wall portions respectively configured by the upper side plate portion and the lower side plate portion, the side plate portions configuring the side wall portions together with the upper side plate portion and the lower side plate portion; and flange portions that are formed by bending respective leading end portions on the upper face portion side and the lower face portion side of each of the side plate portion or the lower face portion. |
