Servo shell

Abstract

The invention discloses a servo shell. The servo shell comprises a servo shell body and an anodic oxidation layer. The servo shell body is an aluminum casting component. The servo shell body is connected with a turbine and a worm of an automobile steering device. The accuracy of the matching angle of the turbine and the worm, assembled on the servo shell body, of the steering device is 2 arc minutes. The porosity factor of the servo shell body is 5 percent. Anodic oxidation is carried out on the servo shell body for generating the anodic oxidation layer. The anodic oxidation layer can meet the requirement of resisting a 720-hour salt spray test. Through the way, anodic oxidation is carried out on the surface layer of the servo shell body so that the servo shell body can be resistant to oily corrosion, the connection portions between the servo shell body and the turbine and the worm of the steering device can avoid matching gaps through the requirement for high fitting precision, a car can avoid danger in the process of steering brake, and the porosity factor is lowered so that the strength and impact resistance of a servo shell body casting can be improved effectively.

Description

technical field [0001] The invention relates to the field of auto parts, in particular to a servo housing. Background technique [0002] At present, the automobile steering gear housings on the market are generally made of cast iron and aluminum alloy, but the quality of cast iron is large, and the production line for processing cast iron occupies a larger area than the cast aluminum production line, which causes greater environmental pollution. In addition, the heat dissipation of cast iron is better than that of cast aluminum. It is much worse and increases fuel consumption; the general aluminum alloy steering gear housing adopts the traditional aluminum casting process, which has low fitting accuracy, high porosity, short product life and poor function. Contents of the invention [0003] The main technical problem to be solved by the present invention is to provide a servo casing, which uses vacuum die-casting technology to make the servo casing more resistant to oily c...

AI Technical Summary

Problems solved by technology

[0002] At present, the automobile steering gear housings on the market are generally made of cast iron and aluminum alloy, but the quality of cast iron is large, and the production line for processing cast iron occupies a larger area than the cast aluminum production line, which causes greater environmental pollution. In addition, the heat dissipation of cast iron is better than that of cast aluminum. It is much worse and increases fuel consumption; the general aluminum alloy steering gear housing adopts the traditional aluminum casting process, which has low fitting accuracy, high porosity, short product life and poor function

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