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With the continuous development of social economy, in order to increase the comfort and safety of vehicles, the use of electrical equipment in the vehicle is also increasing. The automotive wiring harness is the carrier of the various parts of the automobile circuit, and plays an important role in the normal and stable operation of the vehicle's complete vehicle circuit. The design of the contact point in the harness design is particularly important, because the increase of the contact loop causes the partial circuit contact to be bad and affects The normal operation of the vehicle.

2, design method

Automotive wire harness contact design commonly used ultrasonic welding, U-type terminal crimping, J / C connector, solder and so on.

3, contact protection

If the protection of the harness contact is unreasonable, it will cause the puncture insulation at the harness joint to form a short circuit fault. In general, the distribution of automobile contacts is divided into dry and wet areas. The joints in the dry area are protected with special adhesive tape. The joints in the wet area need to be made of heat-shrinkable tube or butyl rubber. Protected to achieve a waterproof seal effect.

4, the choice of contact location

Harness drawings are currently drawn by CHS, VESYS, and other related software, and contact locations can be displayed in 2D drawings. The position of the contact is not only related to the cost of the wire harness, but also the quality of the wire harness. Unreasonable designs will increase the cost of wiring harnesses, increase the quality of wiring harnesses, and may also cause problems such as assembly difficulties. There are several points to set the position of the harness contact.

(1) Choose a location where the harness is arranged more smoothly. You cannot select the location of the movement and the location where the degree of disturbance is large.

(2) Arrange the contacts near the intersection of the signal lines and the trunk. This can effectively reduce the number of wires and save costs.

(3) The distance between the contact point setting and the branch point needs to be greater than 50mm, and the distance between the contact points must be greater than 50mm, so as to effectively avoid the contact between the contact points.

With the fierce competition in the market, concepts such as automotive quality and cost continue to strengthen. The design of excellent harness contacts not only helps to reduce costs, but also improves the quality of the harness. Therefore, designers need to constantly explore and summarize the design work, find and follow more rational design, and continue to improve the details in the actual design.