Subframe structure

Abstract

The object of the present invention is to provide a sub-frame structure capable of solving bolt slippage and abnormal noise and having a simple structure. As for the gasket, the ball gasket includes a gasket body fixedly connected with the support arm, and a steel ball is riveted on the gasket body, and the steel ball protrudes from the upper surface of the gasket body. In the above solution, after the spacer body is installed on the support arm, it is tightened with the body, and the steel ball, the body sheet metal and the upper plate of the sub-frame are bitten together under relatively high pressure, so as to ensure that the sub-frame is relatively stable relative to the body. There is no abnormal slipping noise under a large impact load.

Description

technical field [0001] The invention relates to the technical field of automobile parts, in particular to a sub-frame structure. Background technique [0002] The subframe of the car can be regarded as the skeleton of the front and rear axles. As a component of the front and rear axles, it can support the front and rear axles and the suspension brackets, so that the axles and the suspension brackets can be connected to the body through it. The subframe is usually welded by fully extruded aluminum profiles. Since the mounting surface of the subframe connected to the body floor and the longitudinal beam is machined after welding, its surface is smooth and the friction coefficient is small. When the vehicle encounters an emergency If the vehicle passes the speed bump at a speed of about 40Km / h and simultaneously steps on the brake to hit the direction (to avoid the emergency braking vehicle ahead at the intersection), the whole vehicle is subjected to a large longitudinal impac...

AI Technical Summary

Problems solved by technology

The sub-frame is usually welded by fully extruded aluminum profiles. Since the mounting surface of the sub-frame connected to the body floor and longitudinal beams is machined after welding, the surface is smooth and the friction coefficient is small. When the vehicle encounters an emergency If the vehicle passes the deceleration belt at a speed of about 40Km / h while stepping on the brakes and turning the direction (to avoid the emergency braking vehicle in front at the intersection), the whole vehicle is subject to a large longitudinal impact force, and the chassis sub-frame and the body are clamped Insufficient force will lead to problems of bolt slippage and abnormal noise due to excessive load on the sub-frame installation point under this extreme working condition, and the installation stability of the sub-frame and suspension system cannot be well guaranteed

In order to solve the problem of abnormal slippage, the current solution is to add a knurled sleeve 2 at the position of the vehicle body mounting point on the subframe 1, such as figure 1 , figure 2 As shown, the hobbing end surface 2a of the knurled sleeve 2 abuts against the bottom of the vehicle body to increase friction and effective clamping force, but the connection method and processing technology of the knurled sleeve 2 are complicated and costly

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