Rear-drive auxiliary frame assembly

Abstract

The invention discloses a rear-drive auxiliary frame assembly. The device comprises a front cross beam and a rear cross beam, wherein the left longitudinal beam and the right longitudinal beam are longitudinally arranged; the front cross beam, the rear cross beam, the left longitudinal beam and the right longitudinal beam are encircled to form a # shape; wherein the left end part of the front cross beam is fixed on the left longitudinal beam, the right end part of the front cross beam is fixed on the right longitudinal beam, the front side surface of the rear cross beam is fixed on the rear end parts of the left longitudinal beam and the right longitudinal beam, and the main speed reducer is detachably fixed on the front side surface of the rear cross beam in a #-shaped central cavity. Therear-drive auxiliary frame assembly is simple in structure, the overall weight of a rear auxiliary frame is effectively reduced, the purpose of light weight is achieved, the economical efficiency ofa whole vehicle is improved, an installation point can be provided for a main speed reducer, the requirement for convenient installation of the main speed reducer is met, the good platformization advantage is achieved, and the stability of the vehicle is facilitated.

Description

technical field [0001] The invention relates to the technical field of automobile frames, in particular to a rear-drive sub-frame assembly. Background technique [0002] The rear subframe is the load-bearing basis of the rear chassis suspension of the car. It is an important safety and load-bearing component, supporting all sprung masses, and at the same time bearing and transmitting various forces and moments generated during the driving process of the car. Therefore, the stiffness, strength, modal, and fatigue life of the subframe play a vital role in the overall strength, operational stability, comfort, and safety of the vehicle. [0003] The main structure of the rear sub-frame is mostly formed by stamping and welding of sheet metal parts, or a combination of pipe beam structure and sheet metal. By welding various brackets on the main structure, it provides installation for the stabilizer bar and the guiding mechanism of the suspension system. This makes the structure o...

AI Technical Summary

Problems solved by technology

[0005] 1. The main reducer of the rear-drive model adopts an independent main reducer mounting bracket, which will greatly increase the weight of the vehicle and need to occupy a certain space, thereby affecting the spatial arrangement of other parts of the chassis. It cannot be integrated on the rear suspension assembly , but also increase the workload of vehicle assembly

[0006] 2. The main reducer mounting bracket of the rear-drive model is integrated in the rear sub-frame, which puts forward higher requirements for the sub-frame, not only to meet the space layout, but also to meet the strength, stiffness, modal and chassis NVH performance requirements , making the design and manufacture of the rear subframe more complicated

[0007] 3. Due to multiple hard points or the limitation of installation space, the structure of the rear sub-frame is relatively complicated, requiring more welding processes

The main beam of the subframe is formed by sheet metal stamping and welding. Even if it can meet the strength and rigidity of the structure, it does not achieve the purpose of light weight. At the same time, it also increases the difficulty of product manufacturing and quality stability control.

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