White vehicle body frame

Abstract

The invention discloses a white vehicle body frame. An upper surface of a front floor assembly is flush with the upper surface of a rear floor assembly, a concave spare wheel cabin is arranged on themiddle rear portion of the front floor assembly, and an upper left longitudinal beam and an upper right longitudinal beam are fixed to the upper surface of the front floor assembly in a bilateral symmetry mode. The left upper longitudinal beam and the right upper longitudinal beam are respectively arranged corresponding to the front parts of a left beam and a right beam up and down; a cross beam group comprises a first cross beam, a second cross beam and a cross beam outward extending component which are fixed on the lower surface of the front floor assembly and also comprises a spare wheel cabin upper cross beam, a left seat front cross beam, a right seat front cross beam, a left seat rear cross beam and a right seat rear cross beam fixed to the upper surface of the front floor assembly,the outer side of the left beam and the outer side of the right beam are fixedly connected with a threshold inner plate body through cross beam outer extending assemblies respectively. According to the white vehicle body frame, a multi-force-transmission-path frame structure is formed, the collision force is effectively dispersed, the safety performance of a vehicle is improved, the height of thevehicle is reduced, and the wind resistance of the whole vehicle is improved.

Description

technical field [0001] The invention relates to a body-in-white frame, in particular to a body-in-white frame. Background technique [0002] The body frame is the main body of the vehicle to bear the load and resist the impact of collisions. Its strength is determined by the frame beam loop and its connecting joints. Due to the differences in the market positioning, functional configuration, engineering layout and manufacturing strategy of the complete vehicle, the body frame is different. Common MPV body frames come in two forms: [0003] 1. If Figure 1-4 As shown in , the semi-load-bearing body frame mainly transmits force through the front frame 55, the middle frame 56, and the rear frame 57 on the front, and a small part of the force is distributed to the side wall through the front wall reinforcement plate 47 and the front brace plate 48; The force is transmitted through the annular frame formed by the side frame 52 and the beam. The frame structure has the followin...

AI Technical Summary

Problems solved by technology

The frame structure has the following problems: ① It mainly relies on the front / middle / rear frame to bear the load. As the size of the vehicle increases, the collision energy increases, requiring a proportional increase in the Z-direction section of the frame, which affects the interior space of the vehicle body and the ground clearance

②The tee joints between the front support plate 48 and the door sill and the A-pillar are weak, which is not conducive to the dispersion of the collision force, and the damage to the passenger's calf is large

③There are few force transmission paths in the middle channel, resulting in a large amount of overall frontal collision intrusion, insufficient bending stiffness and mode of the body-in-white; some models do not have a middle channel structure, and the installation cost of the sub-dashboard and other interfaces is high

④ There is an upper and lower overlap between the threshold inner panel body 15 and the frame and floor, which is not conducive to welding advancement and precision improvement

The frame structure has the following problems: ① There are floor steps 49 between the front floor and the rear floor, which cannot meet the long-distance sliding function of the middle row of MPV models.

②Middle row: The middle aisle where the passengers put their feet has a high structural height, and the passengers in the middle row have poor ride comfort

③The misalignment of the rear frame and the cavity of the rear end plate is not conducive to the overall performance of the body frame loop structure

④ There is no reinforcing plate at the lower part of the central channel plate 22, and the body frame at the B-pillar does not form a closed loop, which is not conducive to exerting the maximum side impact performance

⑤The overlapping structure of the rear end plate assembly and the side wall is complicated, and the welding process is poor. It needs to adopt layered welding for general assembly, with many stations and high cost

⑥ The guide angle of the overlapping structure of the side wall frame 52 and the rear end plate assembly is small, which is not conducive to welding advancement, and the assembly precision requirements are high

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