Heavy-duty truck rear wheel fender bracket and processing method

Abstract

The invention relates to a heavy-duty truck fender bracket, comprising: a bracket seat and a bracket tube, the bracket tube is connected with a step on one side of the bracket seat, the bracket seat is a flange structure, and one side of the bracket seat is provided with a It is an axis, a cylindrical step connected with the support tube; the support tube is processed by expansion, pressure and reaming of an end tube wall, and its end shape is: a straight tube connected with the cylindrical step of the support seat and a section of variable-diameter tube that is composed of a "trumpet" shaped tube; the connection structure between the bracket seat and the bracket tube is: the two are interference fit, and the joint is fully welded; the beneficial effects of the present invention compared with the prior art are: 1. Increase the length of the weld seam and improve the welding strength. 2. The production and processing technology is simple and the production cost is low; 3. The pipe wall will not suffer from fatigue fracture.

Description

technical field [0001] The invention relates to an automobile part, in particular to a fender bracket for a heavy-duty truck. Background technique [0002] At present, the patent number of a fender bracket commonly used in domestic heavy trucks is: ZL2012206494798, and the title is "a fender bracket for heavy vehicles". Its structure is composed of flange, special-shaped tube and plug needle. The flange is set on the outer wall of the end of the special-shaped tube. The shape is arc triangle, and the three are interference fit. The following problems exist in the production and use of this product: 1. Since the center hole of the flange, the end of the special-shaped pipe and the plug needle are in the shape of a circular arc triangle, the connection between the three is an interference tight fit, and the flange and special-shaped The processing accuracy and coaxiality of the tube and the plug needle are highly required, so the production process is relatively complicated ...

AI Technical Summary

Problems solved by technology

The following problems exist in the production and use of this product: 1. Since the center hole of the flange, the end of the special-shaped pipe and the plug needle are in the shape of a circular arc triangle, the connection between the three is an interference tight fit, and the flange and special-shaped The processing accuracy and coaxiality of the tube and the plug needle are very high, so the production process is more complicated and the cost is higher

2. Since the fender is suspended on the straight section at the other end of the special-shaped pipe in the fender bracket, the distribution of stress points of the special-shaped pipe during use is that the closer it is to the flange, the greater the pull-off force and the greater the stress on the pipe wall. The larger the size; when the heavy-duty trucks operate under harsh road conditions for a long time, the interference-fit plug needles in the special-shaped pipe holes are prone to pull-off and tearing of the pipe wall

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