Short-wheelbase frame assembly and mounting method

Abstract

The invention relates to a short-wheelbase frame assembly and a mounting method. According to the technical scheme, the short-wheelbase frame assembly comprises a left longitudinal beam and a right longitudinal beam which are horizontally and oppositely arranged, a cross beam is connected between the left longitudinal beam and the right longitudinal beam, the left longitudinal beam and the right longitudinal beam are each of a groove-shaped structure, and each groove-shaped structure comprises a horizontal upper wing face, a horizontal lower wing face and a vertical ventral face; the cross beam is connected with the ventral surface of the left longitudinal beam and the ventral surface of the right longitudinal beam through connecting plates, and the upper wing surfaces of the left longitudinal beam and the right longitudinal beam are not provided with connecting structures and connecting pieces; the ventral surface of the left longitudinal beam and the ventral surface of the right longitudinal beam respectively comprise a narrow ventral surface at the front part and a wide ventral surface at the middle rear part, the narrow ventral surface and the wide ventral surface are connected through a trapezoidal variable cross-section structure, the trapezoidal variable cross-section structure is a structure which extends and narrows downwards towards the front part, and an upper airfoil surface connected with the narrow ventral surface is lower than an upper airfoil surface connected with the wide ventral surface; the ventral surface of the left longitudinal beam and the ventral surface of the right longitudinal beam are provided with standard mounting holes which are equal in height and interval. The upper wing surface can be prevented from cracking, and the universality and standardization of the frame are improved.

Description

technical field [0001] The invention relates to the technical field of vehicle frame assembly, in particular to a short-wheelbase vehicle frame assembly and an installation method. Background technique [0002] The existing light truck frame assembly still has some irrationality in the design of the longitudinal beam, mainly in the following points: 1. The middle and rear parts of the frame usually have unequal ventral heights and a dovetail structure, resulting in low versatility of the beam. The rear-end smoke area is prone to bending and deformation; [0003] 2. The frame holes are adjusted according to the layout, without standardization of hole positions, it is difficult to modify the vehicle; [0004] 3. The upper airfoil of the frame longitudinal beam has concentrated stress and is easy to crack. Contents of the invention [0005] Aiming at the problem of unreasonable design of the longitudinal beams of the above-mentioned light trucks, the present invention provi...

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Problems solved by technology

[0005]Aiming at the unreasonable design of the longitudinal beams of the above-mentioned light trucks, the present invention provides a non-connecting structure for the upper wing surfaces of the left and right longitudinal beams, the middle and rear of the left and right longitudinal beams Short-wheelbase vehicle frame assembly and installation method with equal belly surface and standard installation holes

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