Multichannel device for rear end of front vehicle body

Abstract

The invention discloses a multichannel device for the rear end of a front vehicle body. The multichannel device comprises a front girder welded part, a front surrounding plate and a front floor; the front surrounding plate and the front floor are fixedly connected to the front girder welded part, the front surrounding plate and the front floor are fixedly connected, front floor reinforcing platesare fixedly connected to the inner sides of the middles of the two sides of the front girder welded part correspondingly, the longitudinal sections of the front floor reinforcing plates are in U shapes, the upper parts of the front floor reinforcing plates are fixedly connected with the front surrounding plate, the middles of the front floor reinforcing plates are fixedly connected with the frontfloor, the right ends of the front floor reinforcing plates are fixedly connected with front floor center channel reinforcing plates, and the front floor center channel reinforcing plates are fixedlyconnected to the front floor. According to the multichannel device for the rear end of the front vehicle body, the local rigidity of an overlapped area of the front girder welded part, the front surrounding plate and the front floor is improved, meanwhile, the force transferring path is increased, collision energy is dispersed into all main bearing parts as much as possible, and thus the force transferring path is more multidirectional, shorter and more stable.

Description

technical field [0001] The invention relates to a rear end of a front vehicle body, in particular to a multi-channel device at the rear end of a front vehicle body. Background technique [0002] The front body structure plays a fundamental and framework role in the bending and torsional stiffness of the body-in-white, local vibration, and force transmission during a collision. The front body structure area integrates parts in many areas such as power and chassis. The body must meet the requirements including stiffness and strength, which has an important impact on the dynamic NVH performance of the vehicle. [0003] Existing two kinds of typical front car body rear end structures all have some deficiencies in it, as a kind of front car body rear end structure (as figure 1 ) has the following deficiencies: (1) The structure of the dash panel 01 and the welded parts 02 of the central channel and the front beam on both sides has no cavity through, and it is only a single-layer...

AI Technical Summary

Problems solved by technology

[0003] Existing two kinds of typical front car body rear end structures all have some deficiencies in it, as a kind of front car body rear end structure (as figure 1 ) has the following deficiencies: (1) The structure of the dash panel 01 and the welded parts 02 of the central channel and the front beam on both sides has no cavity through, and it is only a single-layer plate structure, which will cause insufficient local stiffness and large vibration of the dash panel Problem: Especially in the case of side collision, the front end area of ​​the lower body cannot effectively transmit the impact from one side to the other side, which will affect the B-pillar, the front door sill inner panel 03, etc. The amount of intrusion is too large, which increases the loss of points; (2) Frontal collision The transmission path is single, except for the front frame weldment 02, the rear half of the front frame weldment 02 only has the front sled brace 04 connected to the front sill inner panel 03

[0004] Another front body rear end structure (such as figure 2 ) has the following deficiencies: (1) The dash panel 01 and the front frame welded parts 02 on both sides are connected through a whole piece of sheet metal structure to form a cavity through structure, which has the problems of complex overlapping surfaces of parts and difficulty in ensuring accuracy ; (2) Increase the front floor longitudinal beam 05 on both sides of the central passage, increase the force transmission path, and end at the middle section of the front floor, not reaching the connection between the front and rear floors; (3) Add the front wall reinforcement plate 06 and the front floor longitudinal beam 05. Due to the complex overlapping structure with the dash panel 01, it can be seen from the A-A view that effective solder joint connections cannot be made locally, resulting in high cost of parts, but the strengthening effect is not obvious

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