Patent ID: 11873030
Assignee: KIA CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. An underbody for a vehicle comprising:
a panel assembly configured to form a floor of a vehicle interior;
an upper member assembly configured to be laminated on and coupled to an upper side of the panel assembly; and
a lower member assembly configured to be laminated on and coupled to a lower side of the panel assembly and coupled to a side portion of the panel assembly and a side portion of the upper member assembly;
wherein the panel assembly comprises;
a center floor panel configured to form a floor of a front portion of the vehicle interior, the center floor panel including a center tunnel part; and
a rear floor panel fixed to a rear end of the center floor panel and extending from the rear end of the center floor panel backward to form a floor of a rear portion of the vehicle interior;

wherein the lower member assembly comprises:
a pair of side sills fixed to each of a left end and a right end of the center floor panel;
a pair of front side members having a rear portion fixed to a front end of each side sill;
a pair of rear side members fixed to the rear portion of each side sill to extend to a rear end of the rear floor panel, and fixed to each of a left portion and a right portion of the rear floor panel;
a front cross member connecting front ends of the pair of rear side members;
a rear cross member disposed on a rear of the front cross member and connecting central portions of the pair of rear side members and fixed to a lower surface of the rear floor panel;
a pair of tunnel side reinforcements having a front end fixed to a rear portion of each front side member, a rear end fixed to each of a left portion and a right portion of the front cross member, and fixed to the lower surface of the center floor panel; and
at least one brace connecting the pair of tunnel side reinforcements and fixed to α lower surface of the center tunnel part:

wherein the upper member assembly comprises:
a tunnel reinforcement fixed to the center tunnel part of the center floor panel; and
a plurality of seat cross members each having a first end fixed to a side surface of the tunnel reinforcement, and a second end fixed to an upper portion of the side sill.