Automobile wire harness grounding protecting method

Abstract

The invention aims at providing an automobile wire harness grounding protecting method which can avoid grounding failure caused by penetration of electrophoretic paint. The automobile wire harness grounding protecting method comprises the steps of welding a grounding nut to an automobile body, utilizing a protecting bolt penetrating through the grounding nut to install a protecting gasket between the protecting bolt and the automobile body grounding surface, enabling the outer diameter of the protecting gasket to be larger than or equal to that of a flange surface of the protecting bolt, and enabling the inner diameter of the protecting gasket to be equal to the outer diameter of the protecting bolt; performing electrophoresis on the automobile body; and dismantling the protecting bolt and the protecting gasket after the electrophoresis is finished, and then utilizing a fastening bolt and the grounding nut to perform grounding fastening on a wire harness. The automobile wire harness grounding protecting method is simple in steps, excessive cost does not need adding, the fact that the grounding surface is not subjected to pollution in the electrophoresis process can be effectively guaranteed, reliability of grounding electric connection is guaranteed, and the automobile wire harness grounding protecting method is suitable for a grounding method of using a projection welding grounding nut.

Description

technical field [0001] The method relates to a grounding protection method for an automobile wiring harness. Background technique [0002] With the rapid development of electronic technology and its wide application in the automobile industry, the degree of automobile electronics is getting higher and higher, and the requirements for the safety of automobiles are also getting higher and higher. According to statistics, almost 70% of car failures are caused by electrical systems. There are many reasons for electrical system failures, but some of them are caused by poor grounding. These failures can affect certain aspects of the car. Seriously then even the tragedy of car crash occurs, so it is very important to ensure the reliability of automobile grounding. [0003] At present, there are two grounding methods commonly used in the grounding form of automobiles: one is to use planted welding grounding bolts; the other is to use projection welding grounding nuts. The groundi...

AI Technical Summary

Problems solved by technology

The grounding bolt uses its own platform to avoid damage to the grounding contact surface during welding and affect electrical performance. It is the recommended grounding method. The protection of this type of grounding bolt is generally tightened with a nut sleeve made of plastic or metal material. On the ground bolts, thus protecting the ground bolts from being covered by electrophoretic paint and ensuring the reliability of the ground, but for those who cannot use welding ground bolts due to limited layout space and consider avoiding the protruding ground bolts in the car interior. The potential hidden danger of injury caused by indoor members requires the use of ground nuts. At present, the commonly used method in the industry is to protect the ground surface by using ground protection bolts and ground nuts to tighten the ground surface, so as to avoid the ground surface being covered by electrophoretic paint. The grounding is not good, but this method has certain shortcomings, and the actual protection effect is poor. The reason is that the grounding surface may be deformed when welding the grounding nut, and there are manufacturing errors in the production process that cannot guarantee that the grounding surface is completely flat. , so the protective bolt is not completely attached to the ground surface, which may lead to the penetration of electrophoretic paint

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