Patent ID: 9580105
Date: 2017-02-28
CPC Classifications: B60R,B62D

Claim:
1. An under-floor frame system for a vehicle, comprising: a main frame of carbon fiber composite materials that forms a closed quadrangle, a front of the main frame is a front bumper member, both sides of the main frame are side members that extend from a front to a rear of the main frame, and a rear of the main frame is a rear bumper member; a front cross member of carbon fiber composite materials that extends along a width direction of a vehicle, and connects the front portion of both side members of the main frame and a rear cross member that connects the rear portion of the side members; and an additional side member of carbon fiber composite materials that extends in the length direction of a vehicle, and is connected to the side member of the main frame, wherein the rear end of the additional side member extends along the rear bumper member of a main frame, and forms an additional rear member of carbon fiber composite materials, and wherein a spring sheet on which a rear wheel suspension spring is seated is connected to the lower end of the additional rear member.