Automobile cross beam assembly

Abstract

The invention discloses an automobile cross beam assembly. The automobile cross beam assembly comprises a first cross beam, a second cross beam and an X-shaped cross beam reinforced rack, wherein theupper and lower ends of the first cross beam and the upper and lower ends of the second cross beam are fixed to the inner side of a car body upper longitudinal beam and the inner side of a car body lower longitudinal beam respectively; the X-shaped cross beam reinforced rack is arranged between the first cross beam and the second cross beam; the upper end of the X-shaped cross beam reinforced rackis fixedly connected with the car body upper longitudinal beam; and the lower end of the X-shaped cross beam reinforced rack is fixedly connected with the car body lower longitudinal beam. Accordingto the automobile cross beam assembly disclosed by the invention, the overall torsion mode of a car body is improved effectively, so that the vibration of an automobile is reduced, the overall comfortof passengers is improved, the overall bending rigidity of the car body is improved effectively, the structure stability is improved, load is effectively transferred to the car body lower longitudinal beam or even the car body through the cross beam reinforced rack, and stress concentration is avoided.

Description

technical field [0001] The invention relates to an automobile crossbeam assembly, in particular to an automobile crossbeam assembly on a mini truck frame. Background technique [0002] At present, most of the frame beams of traditional mini trucks are circular tube beam structures, such as figure 1 Said, including the first crossbeam 1', the second crossbeam 2', the upper longitudinal member of the vehicle body 3', the lower longitudinal member of the vehicle body 4', the rear installation part 5' of the transmission and the installation part 6' of the transmission shaft, the first crossbeam 1 ' and the upper and lower ends of the second beam 2' are respectively fixedly connected with the upper side beam 3' and the lower side beam 4' of the vehicle body, and the transmission rear mounting part 5' and the transmission shaft mounting part 6' are respectively arranged on the first cross beam 1 ' and the second beam 2', the structure is relatively simple, and the structure has ...

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Problems solved by technology

[0003] 1. Insufficient structural rigidity, the torsional performance of the first crossbeam 1' and the second crossbeam 2' is not good, there is no connection reinforcement structure between the first crossbeam 1' and the second crossbeam 2', and the two ends are only connected to the lower longitudinal beam of the upper body connection, insufficient torsion performance of the beam;

[0004] 2. The rear installation part 5' of the transmission and the transmission shaft installation part 6' have insufficient dynamic stiffness and poor structural stability: the rear installation part 5' of the transmission and the transmission shaft installation part 6' are respectively arranged on the first beam 1' and the second beam 2' On the one hand, the beam is relatively single, the Y-direction connection structure cannot meet the requirements, and the structural vibration is large, which affects the NVH performance of the whole vehicle

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