A rear fixing bracket for a large-sized sub-instrument panel

Abstract

The application discloses a rear fixing bracket for a large-sized sub-instrument panel, which relates to the technical field of vehicle body design and includes: a lower base, which is a cube frame, and its bottom is fixed to the vehicle body floor; an upper bracket, which includes a mounting plate, a turning plate and a cantilever plate, the mounting plate is installed on the side of the lower base; the cantilever plate is kept horizontal in a natural state, and the turning plate is transitionally set between the mounting plate and the cantilever; the sides of the cantilever plate are all set The downward first flange; the two first flanges are provided with lateral installation holes at the same position, and two bottom installation holes are provided on the cantilever plate, and the two lateral installation holes and the two bottom installation holes are used for Install the sub-dashboard. The rear fixing bracket of the present application can not only meet the collapse performance requirements during head impact, but also meet the modal performance requirements.

Description

technical field [0001] The application relates to the technical field of vehicle body design, in particular to a rear fixing bracket of a large-sized auxiliary instrument panel. Background technique [0002] At present, in the process of body design, it is necessary to prevent rear passengers from hitting the sub-dashboard with their heads and causing injuries. Specifically, the national standard GB 11552 design requirements for interior protrusions of passenger cars points out that when the vehicle collides and the rear passengers wear their seat belts and their heads can hit the sub-dashboard, the sub-dashboard is required The board has the function of collapsing and absorbing energy, preventing the rear passengers' heads from being seriously injured during the impact. In the actual test process, a sphere with a diameter of 165mm and a weight of 6.8kg was used to simulate the human head, and hit the head-impact area of ​​the sub-dashboard at a speed of 24.1km / h. It is req...

AI Technical Summary

Problems solved by technology

[0004] However, the cost of the dynamic immunity scheme is high, and the dynamic immunity test needs to do a pulley test to simulate a real collision, to prove that the rear dummy is wearing a seat belt. Does not touch the console

Since it is necessary to consider different collision angles and tall vacationers of different sizes (5%, 50% and 95%) sitting on the rear seats, it is necessary to do a lot of pulley collision tests. high cost

In the rigid bracket scheme, the structures where the two Z-direction installation points and the two Y-direction installation points of the second rear fixed bracket 10a are located are independent of each other, which interacts with the modal and head-impact performance, making it difficult to optimize the structural design to meet the requirements of the model at the same time. When the head impact performance is strong, the mode is often too low, when the head impact performance is weak, the mode is often too high; it is very difficult to find a balance point that just satisfies both the mode and head impact performance. Especially for a large sub-dashboard, the balance point may not exist at all

Images