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1. US20150008703 - Vehicle body bottom structure

注意: このテキストは、OCR 処理によってテキスト化されたものです。法的な用途には PDF 版をご利用ください。

[ EN ]

Claims

1. A vehicle body bottom structure comprising:
a floor panel constituting a floor surface of a vehicle body; and
a pair of side sills each of which is joined to a side portion in the vehicle width direction of the floor panel and has a closed cross-section extending in a front-rear direction,
wherein each side sill includes a side sill outer which is disposed on an outer side in a vehicle, and a side sill inner which is disposed on an inner side in the vehicle and joined to the side sill outer,
wherein each side sill inner is configured to be vertically divided into two, to include an upper member disposed on an upper side, and a lower member disposed on a lower side,
wherein the upper member is formed at substantially the same height as the height of the side sill outer, and has a plurality of ridge portions formed in the front-rear direction, and
wherein the lower member is formed with a plate thickness or material different from that of the upper member, and is disposed substantially horizontally between the floor panel and the side sill outer.
2. The vehicle body bottom structure according to claim 1, wherein each of the side sills includes:
a crushing area, which is provided at a front end portion of the side sill, and is crushed upon receiving a collision load so as to absorb the collision load at a time of a vehicle collision; and
a bulkhead which is disposed in the side sill behind the crushing area,
wherein a reinforcing frame is provided on a vehicle interior side surface of the side sill, the reinforcing frame being inclined inwardly and rearwardly in the vehicle width direction, one end thereof being connected to an outer surface on the vehicle interior side of an installation site of the bulkhead in the side sill, and the other end thereof being coupled to a floor frame, and
wherein a jack-up reinforcing plate, which is strong against a load in an up-down direction of the vehicle body and weak against a load in the front-rear direction of the vehicle body, is provided in the crushing area.
3. The vehicle body bottom structure according to claim 2,
wherein the jack-up reinforcing plate is integrally provided with a deformable member, and the deformation restricting member restricts deformation of the deformable member.
4. The vehicle body bottom structure according to claim 3, wherein a dash cross member is coupled to the side sill inner on a front end of the side sill.
5. The vehicle body bottom structure according to claim 3,
wherein a bending plate which is the deformable member is coupled to a side surface of the jack-up reinforcing plate, and a closed cross-section, which extends in the front-rear direction of the vehicle body between the bending plate and the jack-up reinforcing plate and is made of a constant cross-section, is formed, and
wherein an upper end of the jack-up reinforcing plate is coupled to a lower end of a front pillar inner, and an lower end of the jack-up reinforcing plate is coupled to a lower flange of the side sill inner.
6. The vehicle body bottom structure according to claim 5, wherein the deformable member has a hat-shaped cross-section.
7. The vehicle body bottom structure according to claim 1, wherein the upper member includes an inner upper wall portion, which is disposed at a position lower than an upper wall portion of the side sill outer and has a predetermined width in the vehicle width direction, and an inclined wall portion which extends downwardly and toward the vehicle interior side from an inside in the vehicle width direction of the inner upper wall portion.
8. The vehicle body bottom structure according to claim 7, further comprising
a floor cross member which is disposed over the floor panel and extends in the vehicle width direction,
wherein the upper member further includes a vertical wall portion which extends downwardly from an inside in the vehicle width direction of the inclined wall portion,
wherein the vertical wall portion includes a flat surface portion to which one end of the floor cross member is joined, and a recessed portion having a bottom surface, which is continuous to the inside in the vehicle width direction of the inclined wall portion and is located outside in the vehicle width direction of the flat surface portion, and
wherein the side sill is provided with a deformation restricting member which extends in the front-rear direction across the inner upper wall portion, the inclined wall portion, and the recessed portion.
9. The vehicle body bottom structure according to claim 1,
wherein the side portion in the vehicle width direction of the floor panel is clamped between the upper member and the lower member,
wherein the floor panel, the upper member, and the lower member are joined together through a plurality of spot welding portions, and
wherein a seal member is disposed between the floor panel and the lower member.
10. The vehicle body bottom structure according to claim 9, wherein the sites, which are joined to one another through the spot welding portions, of the floor panel, the upper member, and the lower member, are formed in a horizontal shape.
11. The vehicle body bottom structure according to claim 1, further comprising
a dash lower for separating the vehicle compartment from an engine room,
wherein a front end of the upper member is formed with a flange portion extending in a direction perpendicular to the front-rear direction, and
wherein the flange portion is joined to a rear surface of the dash lower by spot welding.
12. The vehicle body bottom structure according to claim 8,
wherein the inner upper wall portion includes a horizontal surface parallel to the vehicle width direction, and
wherein the bottom surface of the recessed portion includes a vertical surface parallel to an up-down direction.