Rear wheel splash guard supporting frame of heavy truck and machining method of rear wheel splash guard supporting frame of heavy truck

Abstract

The invention relates to a splash guard supporting frame of a heavy truck. The splash guard supporting frame of the heavy truck comprises a supporting frame seat and a supporting frame pipe, wherein the supporting frame pipe is connected with a step on one side of the supporting frame seat; the supporting frame seat is of a flange structure; the cylindrical step which takes the central line of the supporting frame seat as the axis and is connected with the supporting frame pipe is arranged on one side of the supporting frame seat; the supporting frame pipe is a reducer pipe, the pipe wall of one end of the reducer pipe is machined in a pressurization pore broadening mode, and according to the shape of the end, the reducer pipe is composed of a straight pipe connected with the cylindrical step of the supporting frame seat and a section of horn-shaped pipe. According to the connecting structure of the supporting frame seat and the supporting frame pipe, the supporting frame seat and the supporting frame pipe are in interference fit, and the connecting position is welded in a full-length mode. Compared with the prior art, the splash guard supporting frame of the heavy truck has the beneficial effects that 1, the length of a weld joint is increased, and the welding strength is improved; 2, the production and machining process is simple, and the production cost is low; 3, the pipe wall has no fatigue crack phenomenon.

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 very high, so the production process is relatively complicated and th...

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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