Anti-loosening method Locknut is a nut, screwed together with a bolt or screw to play the role of fastening parts, all production machinery must use an original, locknut is a part of the mechanical equipment closely connected together, Through the inside of the thread, the same specification locknuts and screws can be connected together, the following details for you to explain the pine nuts to avoid slack 4 ways
Locknut
Mechanical locking is the use of lock nut stoppers to directly limit the relative rotation of the lock nut pair. Such as the use of tooth pin, series wire and locking washers. Since the lock nut stopper has no pretightening force, the lock-up nut works only when the lock nut nut is loosened to the stop position. Therefore, in this way, the lock nut is not loosened in practice but prevented from falling off.
Rivet punching and anti-loosening adopts punching, welding, bonding and other methods after tightening, so that the lock nut pair loses its motion pairing characteristics and the connection becomes inseparable. The drawback of this method is that the bolt can only be used once, and the disassembly is very difficult. The bolt must be destroyed before it can be disassembled.
Friction Locking This is the most widely used anti-loosening method, which generates a positive pressure that does not change with the external force between the lock nut pairs to generate a friction force that can prevent relative rotation of the lock nut pair. This positive pressure can be accomplished by axially or simultaneously compressing the lock nut pair in both directions. Such as the use of elastic washers, double nuts, self-locking nuts and insert lock nuts.
The construction of anti-loosening is the application of the locking nut replica body structure, ie the Down locknut anti-loosening method
The three advantages of locknuts:
First, superior anti-vibration performance: when the thread is tightened, the thread angle of the thread of the screw head is tightened tightly into the 30° wedge bevel of the nut, and the normal force generated by the bolt applied to the wedge bevel is The axis is at an angle of 60° instead of 30°. Therefore, the normal force generated when the locknut is tightened is much larger than that of an ordinary standard nut, and it has a great ability to prevent looseness and vibration.
Secondly, it has strong wear-resistance and shear resistance: 30° bevel of the nut thread bottom can evenly distribute the tightening force of the nut on the threads of all the teeth, because the pressing force on each thread surface is evenly distributed. Nuts can better solve the problem of thread wear and shear deformation.
Third, the repeated use of good performance: a large number of uses show that the locking nut after repeated fastening and disassembly, the locking force is still not reduced, can maintain the original locking effect.