Lower swing arm of automobile

Abstract

A lower swing arm of automobile features that the top edge of convex defective corner piece is welded to the outer cylinder of bush, the two outer edges of defective corner bottom are welded to the two sides of small bush hole assembly respectively, and the two welds of top edge and outer edge of convex defective corner piece do not cross each other due to the defective angle. The upper edge of convex defective corner piece is welded to the outer cylinder of bush, and the lower swing arm is welded to the outer cylinder of bush. At that circumferential match welding end of the small bushing hole assembly with the out cylinder of the bushing, the cross section of the U-shaped flanging structure is U-shaped, and the two sides of the U-shaped flanging structure do not intersect with the welding seam of the bushing and the welding seam of the top edge of the convex defective corner piece; The existence of convex angle avoids the welding form of three weld seams intersecting each other in the bushing welding, avoids the problem that the mechanical properties of the material in the weld toe area decrease if three weld seams intersect, and the cross weld seam is easy to overburn in the overlap area, which makes the strength and durability of the weld seam decrease greatly.

Description

technical field [0001] The invention belongs to automobile suspension plate parts, in particular to automobile lower swing arms. Background technique [0002] The front suspension swing arm (also known as the lower swing arm of the car) is a component that connects the steering knuckle and the sub-frame (or body), and mainly transmits the longitudinal and lateral loads excited by the road to the sub-frame (or body). key components of the system. In order to ensure that the swing arm has sufficient rigidity and strength, the swing arm usually adopts the buckle welding structure of the upper and lower plates. The swing arm assembly generally consists of the swing arm body 1a, the swing arm lower plate 2a, the ball stud assembly 3a, the small Bushing hole assembly 4a, large bushing hole assembly 5a and bolt and nut assembly 6a, see figure 1 shown. The advantages of this structure are high rigidity and high strength, but the disadvantages are complex molding process, high ass...

AI Technical Summary

Problems solved by technology

Its advantage is that it is light in weight, and at the same time, the process of molding and assembly is relatively simple. However, since the installation hole 7b is usually reserved in the middle of the swing arm to facilitate the disassembly and assembly of the sub-frame, etc., at the same time, in order to meet the clearance requirements with the sub-frame, the middle installation hole is made 8b has a small cross-sectional size and low structural strength. It is usually only suitable for small cars or light vehicles with light vehicle weight. The versatility deviates and has certain limitations.

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