| 摘要 |
PURPOSE: An under-body frame of a vehicle is provided to increase rigidity by securely fixing a trailing arm of a rear wheel suspension system, and to protect the vehicle from a rear collision. CONSTITUTION: An under-body frame of a vehicle comprises a floor, rear side frames(200), mounting brackets(500), and a rear cross member(300). The floor forms the bottom of the vehicle. The rear side frames are installed in both side ends of the rear part of the floor. The mounting brackets are installed in the rear side frames. The front ends of trailing arms of a rear wheel suspension system are inserted into the mounting brackets. The rear cross member is installed in the floor. Both ends of the rear cross member is fixed to the mounting brackets, respectively.
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