How to choose the wire harness clip and how to fix the wire harness?- Jijin Industral Co., Ltd.

In automotive circuits, automotive wiring harnesses are an important part. The wiring harness of the whole vehicle is arranged in every corner of the vehicle, and the damage of the wiring harness directly affects the electrical performance of the vehicle. In the design process of automobile wiring harness, its safety is the main consideration, and the control of wiring harness direction is an important content in the three-dimensional design of wiring harness. The setting of good fixing points and the selection of fixing methods are the prerequisites for the reliability of wiring harness layout.

Fixed point locations and selections for harnesses:

1. The distance between the wire harness and the two fixed points should not be too large, and should be controlled at about 300mm. In harsh environments such as mud and water, the fixed distance of the cable ties should not be greater than 150mm, and try to use 7*12 cable ties or studs. bring.

2. When the wiring harness is arranged with right-angled corners, fixed points need to be added on both sides of the right-angled corner. In the case of obtuse-angled corners, it can be controlled according to the straight-line distance to avoid acute-angled inflection points.

3. When setting the fixed point on the trunk of the branch point, the fixed point should be as close as possible to the fixed point as allowed by the process (minimum 10mm), and the distance between the fixed point and the branch point should not be greater than 100mm.

4. All wiring harnesses need to be relieved of stress in the connectors exiting high-risk areas. The wiring harnesses should be kept within 120mm of the back of the connectors, and fixed points (wire ties) should be set. If this is not possible, strain relief should be done behind the connector (such as tying the wire harness to the connector housing structure), and a fixing point should be added within 300mm behind the connector.

a fixed way:

1. Tie/buckle fixing

Fixing with cable ties is the most common solution and is widely used. Considering the cost and procurement cycle, it is necessary to use commonly used buckles as much as possible, or buckles with a large amount of use. In addition, the types of cable ties used are minimized to facilitate material and quality management.

2, plastic bracket fixed

Sometimes due to the limitation of body structure and wiring harness arrangement space, it is necessary to develop a separate plastic bracket for wiring harness protection and fixation. This kind of plastic bracket is generally developed separately, and the cost is very high. But the cost is actually relative. We can find that the models with good sales actually use a lot of this plastic bracket.

3. Use the slot structure of other parts to fix

When fixing the wire harness, you can make full use of the existing or newly opened slot structure of other components for fixing. In this case, due to the difficulty of positioning, it is necessary to mark the wire harness separately to facilitate the manufacturing and assembly.

4. Use tape to fix

Simply tying the wire harness to other components with tape is unreliable, especially in harsh environments, and is not allowed. In addition, even in places with relatively good layout environment, this method is not recommended for fixing. If it must be used, it needs to be reviewed and approved, and it is also a place that needs special attention in the vehicle durability test.

When choosing a cable tie for fixing, you need to consider:

1. Ambient temperature

Choose high temperature resistant type, or not high temperature resistant; for high temperature areas on the engine, if you use cable ties for fixing, you should use high temperature resistant cable ties.

2. Waterproof

Choose a stud card for the stud, or choose to be waterproof with a rubber ring;

3. Anti-rotation

Choose the card with 7x12 holes (anti-rotation), or choose the card with round holes (not anti-rotation).

Generally speaking, in order to ensure the direction of the wiring harness, anti-rotation type buckles are generally used, but the anti-rotation buckles will affect the assembly. Use a zip tie with a round hole.

4. Space avoidance

According to the specific type of avoidance, you can choose the corresponding lifting card, offset type, guide type, right-angle type and other buckles.

5. Avoid each other

According to the needs, select the corresponding spreader clip or special structure buckle to separate the wire harness from other components, maintain a certain gap, and prevent mutual movement from causing wear.

6. Installation structure and layout space

Considering the installation boundary of the location where the fixing point needs to be added, select the corresponding stud clips, sheet metal clips, flat clips, etc. as required.

It should be noted that for the sheet metal card, since it will damage the paint surface of the car body, carefully select the position with high appearance requirements (customer perspective), if it must be used, it is recommended to use the plastic type, which does not damage the paint surface of the car body.

It is recommended not to use the flat-type clips that are fixed on the wire harness with adhesive tapes, and it is recommended not to use them in places with thick branches to prevent the clips from falling off due to harsh environments. In addition, due to the wrapping of the tape, the size requirements are very good. Try not to use it continuously to prevent assembly difficulties caused by partial holes.