Application of hitch bolt solutions in electrical troubleshooting

Application of hitch bolt solutions in electrical troubleshooting

Automotive electrical system using direct current, all circuits are divided into positive and negative, in order to save costs and ease of installation, the general automotive circuit is a single-wire system, that is, the positive battery cable is directly connected to the electrical equipment, the negative battery cable directly on the body of the metal parts. Negative wire of the power equipment near the chassis and body metal parts, the use of the engine and the car chassis (frame or sub-frame) and body sheet metal as a public channel, this negative wire connected to the car body is called a hitch, also known as grounding. Negative lap has the advantages of less interference with electronics and less electrochemical corrosion of the frame and body. A poor automotive hitch can produce many failures, typical cases such as loose engine hitch wire fastening bolts, or random installation when rewiring the hitch wire, or rust and corrosion of the hitch wire connector resulting in increased resistance, all of which can cause poor contact, resulting in a drop in voltage or failure to work. On the ignition system, if the engine has a poor hitch, it will cause a weak spark and a reduction in the power of the car. In the starter circuit, if the engine iron is bad, it will cause the starter motor to slow down, the armature is hot, and it is easy to burn the starter motor for a long time. In the lighting circuit, if the lamps and lanterns have a bad iron, it will cause the light not bright or dim light. In modern automobiles, a bad iron will also cause damage to the electronic control module (ECU).

Hitch wires are bolted to metal parts, most of which are treated with electrophoretic paint to meet the vehicle's anti-corrosion requirements. Because the paint is not conductive, an ordinary fixed bolt can not form a practical circuit. The general practice of the host factory is to scrape off the paint of the metal parts of the hitch, another practice is to mask before painting, with tape on the hitch parts, do not let the hitch parts for paint, or in the electrophoresis before the bolt screwed on. These three practices have certain drawbacks: the hitch part does not do the paint long-term exposure in the air, and the hitch wire contact with the sheet metal is easy to rust and corrosion, increasing the contact resistance caused by poor contact. Vehicles on the hitch line fixed bolts are used in special hitch bolts, ordinary bolts, and general head markings for the strength level of the bolt, such as 4.8 and 8.8. hitch bolts-head marking E, the entire vehicle detailed list of English notes for the BOLT, WASHERASSEMBLED (EARTH), the meaning of the grounding bolt. The head marking aims to prevent the host plant assembly workers and maintenance service personnel from installing ordinary bolt confusion errors. The main difference between the hitch bolts and ordinary bolts lies in the threads' shape; the final result is shown in the bolt-nut fit, the ordinary bolt-nut fit for the transition fit, and the hitch bolt-nut fit for the interference fit. In the assembly process, the unique structure of the lap iron thread makes the bolt has the characteristics of self-tapping bolts, and the strength of the bolt is higher than the nut of a grade; the bolt assembly process of the screw teeth scratch off the paint in the nut, through the thread to conduct electricity. This can avoid the contact surface exposure, leading to the hitch part of the corrosion caused by electrical failure. In addition, the interference fit can effectively prevent bolt loosening during vehicle exercise. Add an insurance policy for the bolt spring pad to prevent loosening. Therefore, the bolt itself has an excellent anti-loosening function, the use of the process generally does not add a spring pad, and the structure of the flange bolt. For high-quality Hexagon Flange Screws fasteners and professional technical support, don't hesitate to contact us at adelajonly@gmail.com or visit our website at [Juxin Fasteners]: https://www.juxinfasteners.com.