An automobile rear longitudinal beam assembly and an automobile

Abstract

A rear longitudinal beam assembly of an automobile comprises a rear longitudinal beam in an integrated molding structure, wherein the rear longitudinal beam comprises a front section of the rear longitudinal beam, a middle section of the rear longitudinal beam and a rear section of the rear longitudinal beam, the middle section of the rear longitudinal beam is arranged between the front section ofthe rear longitudinal beam and the rear section of the rear longitudinal beam, the end of the front section of the rear longitudinal beam is connected with a front longitudinal beam, and the end of the rear section of the rear longitudinal beam is connected with a rear retaining beam. The whole rear longitudinal beam is ladder-shaped, and the whole rear longitudinal beam is cast by aluminum alloy, and formed by high pressure casting process. A stiffener III is arranged inside the rear longitudinal beam, and the stiffener III is X-shaped or V-shaped. The stiffener III connects with each otherto form a reticulated structure, and the stiffener III improves the structural strength of the rear longitudinal beam. The rear longitudinal beam of the invention has the advantages of light weight, high integration, high installation precision, high strength, good safety performance and the like. The rear longitudinal beam is an integrated molding structure, which can reduce the quantity of partsand save the welding process between several parts, thus improving the machining accuracy and assembly accuracy of the parts.

Description

technical field [0001] The invention belongs to the technical field of auto parts, and relates to the lightweight technology of a vehicle body longitudinal beam, in particular to an automobile rear longitudinal beam assembly and an automobile. Background technique [0002] As one of the key parts of the car body, the rear longitudinal beam of the car body plays an important role in carrying the load and absorbing the impact of collisions in the car structure. Due to the long overall structure of the rear longitudinal beam, it is usually divided into two parts: the front section of the rear longitudinal beam and the rear section of the rear longitudinal beam. Since the rear longitudinal beam needs to be reasonably avoided and installed with other parts, the overall shape of the rear longitudinal beam is relatively complicated. Currently Common rear longitudinal beams are mostly welded by steel stamping parts, but this steel stamping structure has the following disadvantages: ...

AI Technical Summary

Problems solved by technology

[0003] 1. The rear longitudinal beam composed of multiple steel plate stamping parts needs to increase the welding process, which reduces the size and installation accuracy, increases the body gap, and brings resonance noise

[0004] 2. The rear longitudinal beam welded by multiple steel plate stamping parts must be matched with corresponding mounting plates, mounting supports and other parts in order to realize the connection with the chassis and body structures. Therefore, the number of parts increases and the process increases. At the same time Not conducive to vehicle weight reduction

[0005] 3. The segmented rear longitudinal beam requires an additional connection process between the front and rear sections of the rear longitudinal beam, which increases additional workload and is detrimental to the strength of the vehicle

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