1. Friction anti-loosening, as the name suggests, uses the friction between threads to prevent loosening. A positive pressure that does not change with external force is generated between the internal thread and the external thread to generate friction that can prevent the relative rotation between the threads. For direct locking, stoppers can be used to directly limit the direct relative rotation of threads.
2. Add flat washers - increase the contact area, reduce pressure, and prevent loosening. However, this method is frequently disassembled and only prevents relatively weak screws from loosening. It does not have a strong effect in preventing screw loosening.
3. Thread anti-loosening method: Tighten the double nuts in opposite directions to prevent them from loosening. Tighten two nuts in succession on the threaded rod. There will always be pressure between the contact surfaces of the nut. The screw engagement part in the nut is stretched and the nut is compressed. This set of closing forces forms a friction force that is not affected by changes in external loads.
4. Add flat washers: increase the contact area, reduce pressure, and prevent loosening. However, this method is frequently disassembled and only prevents relatively weak screws from loosening. It does not have a strong effect in preventing screw loosening.