Toyota Jidosha Kabushiki Kaisha

Koi Hata

Ayaka Kagami

Yasuhide Matsuo

Kohei Takahashi

Kosuke Sakurai

Yohei Yamamoto

Yujiro Kaji

Yasuhiro Nishibata

A fastening structure includes: plural overlapping co-fastened members, a clearance hole being formed at at least one mating face of mutual mating faces of the plural co-fastened members, and a screw utilizing frictional heat to bore a hole and form a thread, passing through the clearance hole, and fastening the plural co-fastened members together.

Fastening structure and fastened structural body

A vehicle lower part structure includes a side frame, a floor crossmember, a rectangular tubular rocker, and a connection member. The connection member is provided downward of the floor crossmember in a vehicle up-down direction between the side frame and the rocker, is in surface contact with and joined to each of a lower wall portion of the floor crossmember and a vertical wall portion on an inner side of the rocker in the vehicle-width direction, is formed of a single part into a rectangular tubular member, and has a vehicle front-rear direction as an axial direction of the connection member.

Vehicle lower part structure

At a vehicle, rockers and torque boxes are connected, from a front side, to first connecting portions of spacers. Joined portions of the rockers and the torque boxes are reinforced, and a front wheel directly hitting the joined portion at a time of a collision is suppressed. Separation of a joined portion of a front pillar and a dash panel, whose origin is separation of the previously-mentioned joined portion, can be suppressed. Front portions of the spacers are disposed further toward a front side than the joined portions of the front pillars and the dash panel. Therefore, the front wheel first hits the spacer, and collision load is transmitted to the rocker and the torque box, and thus, input of an excessive collision load to the dash panel is suppressed. Because the first connecting portions extend in a vehicle transverse direction, the spacers becoming large can be suppressed.

Vehicle body front portion structure

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Toyota, Japan

Koi Hata