Light metal high-strength pure electric bus composite structure and connecting process

Abstract

The light metal high-strength pure electric bus composite structure comprises an active connecting section and a passive connecting section, the active connecting section and the passive connecting section are each of a hollow pipe structure, sandwich cores are arranged in the active connecting section and the passive connecting section, the end of the active connecting section is provided with an outward expansion section expanding outwards, and the end of the passive connecting section is provided with a hollow pipe. An outer lantern ring with the inner diameter equal to the outer diameter of the passive connecting section is arranged at the free end of the outer expansion section, an inner shrinkage section which shrinks inwards and is matched with the outer expansion section is arranged at the end of the passive connecting section, an inner lantern ring with the outer diameter equal to the inner diameter of the active connecting section is arranged at the free end of the inner shrinkage section, and the side wall of the outer lantern ring is cut and folded inwards to form a plurality of clamping strips. Clamping grooves in one-to-one correspondence with the clamping strips are inwards formed in the two ends of the passive connecting section and the inward shrinkage sections at the two ends. The active connection section and the passive connection section are connected through magnetic pulses. The simple cavity is adopted as the framework, and the advantages of being simple in structure, low in cost, high in design efficiency, good in lightweight effect and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of automobile structures, in particular to a composite structure of a lightweight metal high-strength pure electric passenger car and a connection process. Background technique [0002] With the continuous strengthening of national and local policy support and the continuous improvement of core technologies such as charging piles and powertrains, the future development of the pure electric vehicle market is promising. Among them, pure electric buses, mainly buses and coaches, are the pioneers of the commercialization of pure electric vehicles, and have become the main national route in the field of public transportation. At present, the body structure of pure electric bus is mainly composed of truss and skin. The material of the truss is mainly high-strength steel, and the connection method is welding to meet the requirements of strength, stiffness and fatigue durability. [0003] However, high battery cos...

AI Technical Summary

Problems solved by technology

However, in order to ensure its performance requirements such as strength, stiffness and NVH, it is necessary to design the truss structure with a thicker wall thickness or a complex section, but the ensuing lightweight effect is limited, and the manufacturing cost is high, which hinders the development of aluminum alloys. Excellent application prospects of light metals such as magnesium and magnesium in pure electric buses

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