D-pillar upper joint structure

Abstract

The invention discloses a D-pillar upper joint structure, which comprises a side wall outer panel, a side wall inner panel, a D-pillar upper reinforcement plate, a roof rear beam outer panel, a roof rear beam inner panel, a D-pillar upper reinforcement plate and a side wall outer panel. The front and rear sides of the panel are connected, the inner panel of the side wall is connected to the opposite side of the inner panel of the roof rear cross beam, the inner panel of the side wall is connected to the end of the reinforcing plate on the D-pillar, and the outer panel of the rear beam of the roof is connected to the head end of the outer panel of the side wall , also includes the D-pillar reinforcing plate, which is a frame-shaped plate with an opening on one side, the D-pillar reinforcing plate is respectively connected with the D-pillar upper reinforcing plate and the side wall inner panel, and the D-pillar upper reinforcing plate is connected with the side wall A closed cavity is formed between the inner panel and the D-pillar reinforcement panel. The joint structure on the D-pillar of the present invention has a simple structure, improves the connection strength of the joint on the D-pillar, can effectively avoid stress concentration, and can increase the torsional moment of inertia of the joint on the D-pillar, reduce the deformation of the tailgate frame, and increase the natural vibration frequency , to avoid resonance and abnormal noise.

Description

technical field [0001] The invention relates to a joint structure of a body in white, in particular to a joint structure on a D-pillar. Background technique [0002] The joint structure at the upper end of the D-pillar is one of the important joint structures of the body-in-white, which directly affects important performances such as strength, stiffness, and mode of the vehicle. The structure of the joint at the upper end of the D-pillar of a traditional mini-car is as follows: figure 1 As shown in the sectional view, it includes side wall outer panel 1, side wall inner panel 2, D-pillar upper reinforcement plate 3, roof rear beam outer panel 4, roof rear beam inner panel 5, etc. Its main disadvantages are: at the joint of the D-pillar, the ends of the side wall outer panel 4 and the upper reinforcement plate 3 are connected to the side wall inner panel 2, which is prone to stress concentration, resulting in fatigue cracking; and from figure 1 It can be seen from the secti...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: at the joint of the D-pillar, the ends of the side wall outer panel 4 and the upper reinforcement plate 3 are connected to the side wall inner panel 2, which is prone to stress concentration, resulting in fatigue cracking; and from figure 1 From the displayed sectional view, it can be seen that the Y direction is an open section, no closed section is formed, and the torsional rigidity is poor, which leads to deformation of the tailgate frame and abnormal resonance noise, which eventually leads to the tailgate being stuck.

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