Introduction to Lock Nut
May 05,2022
The lock nut is a widely used kind of nut. It is favored by users because of its low cost and strong stop reliability. Let's learn about the relevant introduction of lock nut!
Lock nut locking principle
After the threaded fastener is tightened, the preload between the connected parts decreases, which is called fastener looseness. Fastener looseness can be divided into nonrotating looseness and rotating looseness.
Nonrotational looseness is related to the plastic deformation of fastener materials and is embedded by connectors. Rotational looseness is mainly related to the structural factors of the threaded connection.
The Nylon Insert Jam Lock Nut includes all metal lock nuts and non-metal insert lock nuts. The top structure is subject to compression deformation or inserts treatment. When the bolt thread is screwed in and out of its deformation or insert part, the thread or insert produces radial or axial deformation and elastic deformation force. The elastic deformation interferes with the bolt thread and produces friction torque to prevent rotation loosening, that is, effective torque.
At present, it is generally believed that the transverse alternating load is easier to cause the loosening of threaded connection than the axial load. Under the worst working condition - transverse vibration, the residual pre-tightening force of each fastener is compared.
After the transverse vibration test under the same initial preload, the residual preload of the Nylon Insert Jam Lock Nut is significantly higher than that of the ordinary nut and flange nut of the same specification, indicating that the locking reliability of the lock nut is stronger.
Factors affecting the use of lock nut
- Material strain hardening
- Low cycle fatigue
- Friction coefficient
- Manufacturing and assembly
- Closing value
The basic structure of Nylon Insert Jam Lock Nut
The basic structure of the Nylon Insert Jam Lock Nut comprises a nutshell, and one end of the threaded hole of the nutshell is provided with a ring groove; A nylon ring is arranged in the ring groove; The other end of the nutshell is provided with a riveting joint; The riveting joint is riveted with the riveting hole on the connector. The Nylon Insert Jam Lock Nut has the advantages of simple structure and convenient operation. It is especially suitable for occasions with narrow spaces of automobile and aviation lamps and high connection reliability.
The main application of Nylon Insert Jam Lock Nut
It is mainly used in aerospace, aviation, tanks, mining machinery, automobile transportation machinery, agricultural machinery, textile machinery, electrical products, and all kinds of machinery. The demand for Nylon Insert Jam Lock Nuts has increased sharply because its anti-vibration and anti-loosening performance is much higher than other anti-loosening devices, and the vibration life is several times or even dozens of times higher. At present, more than 80% of mechanical equipment accidents are caused by the loosening of fasteners, especially in mining machinery. The use of Nylon Insert Jam Lock Nuts can eliminate major accidents caused by the loosening of fasteners.
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