Advantages and anti-loose methods of jam nut
Jam nut are nuts that are screwed together with bolts or screws to play a role of fastening. All production machinery must be an original part. jam nut are parts that tightly connect mechanical equipment. Threads, locking nuts and screws of the same specification can be connected together. The advantages and methods of locking nuts are introduced in detail below.
Advantages of lock nuts
1. Directional. Standard nuts are non-directional and can be screwed in from either end of the nut (bolt). The thread is directional, and the locking force can only be generated after the bolt is screwed in one direction. Therefore, it is recommended to use a nut with a directional feature, such as a flange lock nut or a flange lock nut, to prevent misinstallation.
2. Anti-vibration performance: The normal force generated when the anti-loosening nut is tightened is much larger than that of ordinary standard nuts, and has great anti-loose and anti-vibration capabilities.
3. jam nut have good re-use performance: A large number of uses indicate that the number of re-uses depends mainly on the use environment. After the lock nut is repeatedly tightened and disassembled repeatedly, its locking force is still not reduced, and the original locking effect can be maintained.
4. Strong abrasion resistance and shear resistance: The 30 ° bevel of the thread of the nut thread can evenly distribute the nut's locking force on the threads of all the teeth. Because the pressing force on the thread surface of each tooth is evenly distributed, the nut Can better solve the problems of thread wear and shear deformation.
Jam nut anti-loose method
Riveting and anti-loosening
After tightening, punching points, welding, bonding and other methods are used to make the lock nut pair lose the characteristics of the motion pair and become an inseparable connection. The disadvantage of this method is that the bolt can only be used once, and the disassembly is very difficult, and the bolt pair must be destroyed before it can be removed.
Mechanical anti-loosening
The relative rotation of the lock nut pair is directly restricted by the lock nut stopper. Such as the use of tooth pin, series wire and stop washer. Because the lock nut stopper has no pre-tightening force, the lock nut stop function works only when the lock nut nut is loosened to the stop position. Therefore, in practice, the lock nut does not prevent loosening but avoids falling.
Structure anti-loosening
It is a lock nut replica body structure, that is, a Down's lock nut anti-loosening method.
Friction prevention
This is the most widely used anti-loosening method. This method generates a positive pressure between the lock nut pair that does not change with external forces, so as to generate a friction force that can prevent the relative rotation of the lock nut pair. This positive pressure can be achieved by pressing the lock nut pair axially or simultaneously. Such as the use of elastic washers, double nuts, self-locking nuts and insert lock nuts.
The above is the introduction of the advantages and methods of jam nut. I hope everyone will understand the advantages and methods of jam nut, and it will be helpful to everyone.
