Automobile body aluminum alloy frame rear connection and chassis rear suspension mounting structure and structural member

Abstract

The invention discloses an aluminum alloy frame rear connection and chassis rear suspension mounting structure and a structural member. The structural member is arranged between a doorsill edge beam and a rear floor longitudinal beam and comprises a rear connecting piece, a doorsill edge beam mounting sleeve nut and a rear suspension mounting sleeve nut, the rear connecting piece is an extruded aluminum alloy section and is of a multi-cavity variable-thickness structure, the two ends of the rear connecting piece are connected with a threshold boundary beam and a rear floor longitudinal beam respectively, a threshold boundary beam installation sleeve nut is installed on the portion connected with the threshold boundary beam, a chassis rear suspension installation point is arranged in the middle of the rear connecting piece, and a rear suspension installation sleeve nut is installed in the middle of the rear connecting piece. The rear connecting piece is integrally formed through extrusion, the development cost is low, the cost of an extrusion die is saved by about 10 times compared with that of a high-vacuum die-casting die, and the cost reduction effect is obvious; the rigidity andthe strength of a chassis rear suspension mounting point can be guaranteed, the weight reducing effect is good; and compared with a steel sheet metal scheme, the weight is reduced by 40%, and compared with a connecting piece scheme after high-vacuum die casting, the weight is reduced by nearly 20%.

Description

technical field [0001] The invention belongs to the field of automobile body parts, and in particular relates to the installation structure of the rear connection of the vehicle frame and the rear suspension of the chassis. Background technique [0002] With the increase of car ownership in the world, a series of problems such as energy shortage and environmental pollution have become increasingly prominent. Lightweight technology is an important technical means to realize energy saving and emission reduction of automobiles. At the same time, due to the upgrading of automobile consumption, consumers' requirements for cost-effective vehicles are constantly increasing, and the competition among automobile companies is increasingly intensified. Therefore, on the premise of meeting the needs of consumers, gradually adopt the optimal design scheme to reduce the cost of automobile development, so as to ensure that the enterprise has a healthy competitive advantage. [0003] The ...

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Problems solved by technology

[0003] The spot welding process of steel structure is adopted between the door sill side beam and the rear floor longitudinal beam of the traditional automobile and the installation position of the rear suspension of the chassis. Meet the requirements of energy saving and emission reduction

For the new aluminum alloy platform body, most of this position uses aluminum alloy high vacuum die-casting parts. Although the weight is reduced, the mold development cost is extremely high. If the project production capacity is not high, the economic benefit will be extremely low

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