A connection structure and connection method for the inner and outer panels of the back door of the automobile

Abstract

The invention provides a connecting structure and connecting method of an automotive back door inner panel and an automotive back door outer panel. The back door inner panel is made of a PP composite glass fiber material, and the back door outer panel is made of a PP material; adhesive applying gaps are formed in the outer circumference of the back door inner panel, the outer circumference of the back door outer panel, the circumference of a window frame and the circumference of a license plate lamp, and a structural adhesive is applied to the adhesive applying gap formed between the back door inner panel and the back door outer panel to achieve connection of the back door inner panel and the back door outer panel. According to the connecting structure and connecting method, the back door outer panel and the back door inner panel are made of plastic and adopt a structural adhesive bonding mode, and therefore light weight is achieved; a traditional edge covering and press fitting process is eliminated, and therefore the process is simpler; the back door inner panel and the back door outer panel adopt the structural adhesive bonding mode, the strength and the stiffness of the back door inner panel structure and the back door outer door panel structure can be optimized according to arrangement of an adhesive applying area, and the number of reinforcing plates is decreased.

Description

technical field [0001] The invention belongs to the technical field of new energy automobiles, and more specifically relates to a connection structure and connection method for the inner and outer panels of the back door of the automobile. Background technique [0002] As a new energy vehicle, electric vehicles have the advantages of energy saving and environmental protection. Electric vehicles are becoming more and more research hotspots in the automotive field. At present, the common problem in the field of electric vehicles is that the battery life of electric vehicles is limited, which limits the popularization and application of electric vehicles. [0003] The back door assemblies used in existing electric vehicles are all metal parts, which are heavy, which is not conducive to the lightweight of electric vehicles, and cannot effectively extend the mileage of electric vehicles. Moreover, the manufacturing, assembly and maintenance costs of metal parts are high, which is...

AI Technical Summary

Problems solved by technology

The hemming and pressing process is complicated, which has many restrictions on the product shape, and is generally applied to metal back doors; while the fusion welding process has a large investment in tooling, and for different materials, if fusion welding is used, it is easy to cause cracking of the inner and outer plates, which is easy to cause appearance poor quality

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