Automobile dragging arm structure

Abstract

The invention relates to an automobile dragging arm structure. The automobile dragging arm structure includes a dragging arm body; one end of the dragging arm body is fixedly connected to a steering knuckle portion, and the other end of the dragging arm body is fixedly connected to an automobile body side installation support; a cross section of the dragging arm body is a hollow sealed cross section; the dragging arm body includes two U-shaped plate structures having U-shaped cross sections; the two U-shaped plate structures are fastened and butt-jointed together to form a sealed mouth-shapedcross section; a bush assembly is arranged on an installation connection point between the dragging arm body and the automobile body side installation support; damping holes I are formed in an upper part and a lower part of a bush cushion of the bush assembly; the damping holes I are waist-shaped through holes or waist-like through holes which are arranged horizontally; damping holes II are formedin a left part and a right part of the bush cushion; and the area of the damping holes I is larger than the area of the damping holes II. The automobile dragging arm structure can significantly reduce road excitation noise, can improve the NVH performance of the automobile, and is low in cost and excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of design and manufacture of automobile parts, and in particular relates to an automobile trailing arm structure. Background technique [0002] With the continuous development of the automobile industry, customers have higher and higher requirements for the ride comfort and driving feeling of the vehicle. Vehicles with loud noise and poor handling and driving sense will give customers the impression of poor subjective feeling, thus greatly reducing the possibility of potential customers choosing to buy a vehicle. [0003] Intuitively speaking, one end of the trailing arm is connected to the steering knuckle of the vehicle chassis, and the other end is connected to the body frame, which provides the longitudinal stiffness of the rear suspension, can play a guiding role in the vehicle, and can ensure the trajectory of the wheels in a certain design. Jump within range. If the structural rigidity of the traili...

AI Technical Summary

Problems solved by technology

If the structural rigidity of the trailing arm is insufficient, it cannot provide sufficient support rigidity, which will easily cause the wheel to jump too much

In addition, during the driving process of the vehicle, resonance may occur due to the low structural mode of the trailing arm body, resulting in excessive excitation on the vehicle body, resulting in roaring problems

At the same time, there is a certain lateral distance between the fixed installation point of the trailing arm and the vehicle body relative to the center of the wheel, which is equivalent to the arm length of the lever. During the driving process of the vehicle, the wheel is excited by the Z-direction load, which will be amplified by the lever effect and transmitted to the dragging arm. The arm and the body are fixed at the installation point, and the load will eventually be transmitted to the body. If the Z-direction load transmitted to the body through the trailing arm is too large, it will also cause a lot of noise in the vehicle cockpit. Therefore, it is necessary to consider how to to reduce the Z-direction load transmitted from the trailing arm to the body

[0004] The trailing arm of the rear suspension is an important connection point between the rear suspension and the body. The quality of the trailing arm structure design directly affects the driving stability and NVH performance of the vehicle. The conventionally designed trailing arm structure is generally a casting Or non-closed cross-section structural parts formed by sheet metal stamping, such structural parts have the disadvantages of heavy weight, high cost or insufficient performance

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