C-pillar lower joint structure

Abstract

The invention discloses a C-pillar lower joint structure which comprises a rear side wall inner plate, a doorsill outer plate welding piece and a C-pillar reinforcing plate, the doorsill outer plate welding piece comprises a doorsill outer plate reinforcing plate and a doorsill outer plate reinforcing plate extending plate, one end of the doorsill outer plate reinforcing plate is connected with one end of the doorsill outer plate reinforcing plate extending plate, and the other end of the doorsill outer plate reinforcing plate is connected with the C-pillar reinforcing plate. One side of the doorsill outer plate reinforcing plate extending plate extends upwards at the disconnected position to be flanged and then is connected with the rear side wall inner plate through a plurality of bolts,and the lower end of the C pillar reinforcing plate extends downwards and then is welded to the doorsill outer plate reinforcing plate through a plurality of welding spots. The problems that in the prior art, after a vehicle collides with a side collision column, the invasion amount is large, battery protection is insufficient, and the stress of a C-pillar lower connector welding point is large are solved.

Description

technical field [0001] The invention relates to the technical field of vehicle manufacturing, in particular to a joint structure under a C-pillar. Background technique [0002] The lower joint of the C-pillar is generally composed of C-pillar reinforcement plate 1, rear side wall inner panel 2, door sill reinforcement plate 3, wheel house outer panel 4 and other parts. Cars have higher requirements for their rigidity and strength. At present, the existing structure has the following problems: [0003] (1) Affected by the door opening and tire layout, the rounded corners of the door frame at the lower end of the C-pillar generally have a cavity size that is large up and down and small in the middle. Large amount, affecting battery / passenger safety; [0004] (2) The rear end of the sill outer plate reinforcement plate is disconnected / stopped at the rounded corner of the door frame, and the end is not closed, the force transmission path is not good, and the surrounding solder...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to propose a joint structure under the C-pillar, which aims to solve the problems of large intrusion after the collision of the vehicle side impact pillar and insufficient protection for the battery in the prior art, as well as the problem of large stress at the welding point of the joint under the C-pillar

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