The screws used in automobiles will be used in conjunction with spring washers. Its most basic requirement is to have good elasticity and the size should also be appropriate, so that when the screw is loose, it can be determined by the friction between the screw and the spring. Reduce the degree and impact of loosening. Although the price of the spring washer is relatively cheap, its function is very huge, especially in the automobile manufacturing, it is an indispensable part. Its good elastic deformation ability is a prerequisite to ensure that the screw will not loosen easily. Therefore, before installing the screw and the spring washer, in addition to checking whether the screw thread is intact, it is also necessary to check whether the elasticity of the paralyzed washer is effective.
The use of cotter pins is also to prevent the car screws from loosening or even slipping off, but not all car screws can use cotter pins. Generally, there are many notes on the use of cotter pins on the large-head screws on the engine part. When using the cotter pin, you must choose the appropriate length, because the engine is running at a high speed during the driving process. If the cotter pin is too long, it will collide with the crank arm and then be scraped. If the situation is not discovered in time, the cotter pin will fall off after a long time, so the screw will lose its protection and will loosen over time. Therefore, when using the split pin, on the one hand, the length must not exceed the width of the screw too much, on the other hand, it must be inserted into the overhead hole of the screw and fixed with a tool. In this way, it can be ensured that the screws cannot be loosened even under high-speed operation.
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Dongguan Wenli Precision Hardware Co., Ltd.