Rear longitudinal beam and vehicle body

Abstract

The invention discloses a rear longitudinal beam and a vehicle body, and belongs to the technical field of vehicles. The rear longitudinal beam includes a rear longitudinal beam body cast by aluminumalloy in an integrated mode, and is high in strength, short in working time, low in mass, low in cost and great in anti-corrosion performance; the rear longitudinal beam body includes a first stress bearing part, a second stress bearing part and a third stress bearing part which are sequentially connected with one another; the structure of the rear longitudinal beam is designed according to actualstress bearing situations, the stress is performed evenly, the deformation amount is less, the stress bearing surface of the first stress bearing part is a first plane, and a first connecting hole isformed in the first plane; the stress bearing surface of the second stress bearing part is a curved surface sinking inwards, the curved surface is provided with an annular connector, and a reinforcedpart is arranged on the surface opposite to the curved surface to ensure the thickness of the stress bearing part of the second stress bearing part; the stress bearing surface of the third stress bearing part is a second plane, and a second connecting hole is formed in the second plane. Since the vehicle body adopts the rear longitudinal beam, the structural strength is high, the mass of the vehicle body is low, the maintenance cost is low, the service life is long, and the safety and reliability are improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a rear longitudinal beam and a vehicle body using the rear longitudinal beam. Background technique [0002] The rear longitudinal beam of the automobile body is the skeleton of the rear chassis of the automobile, that is, the frame under the rear seat and the trunk, and is a key force-transmitting component of the rear structure of the automobile body. [0003] Sheet metal is a comprehensive cold processing process for metal sheets (usually below 6mm), including shearing, punching, cutting, compounding, folding, riveting, forming, etc. The left and right side beams of the rear floor of existing various types of automobiles are basically tailor-welded from sheet metal parts such as low-carbon steel plates through a series of methods such as spot welding and CO2 shielded welding. [0004] Tailored welding of multiple pieces of sheet metal has low structural strength and is eas...

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a rear longitudinal beam to solve the technical problems of low structural strength of the rear longitudinal beam, high production cost, high quality and uneven stress in the prior art

[0006] Another object of the present invention is to provide a vehicle body to solve the technical problems in the prior art that the vehicle body has potential safety hazards, increased maintenance frequency, and high maintenance cost

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