Anti-loose nut assembly

Abstract

The invention provides an anti-loose nut assembly. The anti-loose nut assembly is used for solving the problem of looseness of threaded connection. The anti-loose nut assembly is characterized by comprising a plurality of nuts and a bolt, communicating holes with internal threads are formed in the middle of the nuts, and the bolt penetrates through the communicating holes and is meshed with the internal thread through threads on the surface, so that the plurality of nuts are fastened and connected; and the number n of the nuts is larger than or equal to 3, and when n is equal to 3, the three nuts comprises an upper nut, a middle nut and a lower nut which are fastened and connected through the bolt; and the middle nut is a nut with bosses at the top and the bottom, or grooves at the top andthe bottom, or a boss at the top and a groove at the bottom, the upper nut and the lower nut are concave nuts with grooves or convex nuts with bosses, and the grooves and the bosses are used for being matched with each other to complete the connection between the nuts, the upper nut and the lower nut are used for selecting the concave nuts or convex nuts according to the type of the middle nut tocomplete the matched connection of the upper nut and the middle nut, and the surface of the bosses and the surface of the grooves are not provided with threads.

Description

technical field [0001] The invention relates to a combined nut, in particular to a lock nut assembly. Background technique [0002] For the connection methods of auto parts, there are four commonly used connection methods, namely thread connection, welding, riveting and viscose connection. As one of the commonly used connection methods, thread connection has the advantages of convenient assembly and disassembly, high precision and good economy. It is also the most widely used fastener in automobiles. However, the car will bear random loads during use, and conventional threaded connections are prone to loosening, abnormal noise and other failure forms. Affect the comfort of the car, serious will cause safety accidents. [0003] When conventional nuts are in working condition, the thread load is mainly concentrated near the connected parts, and usually only the first four threads bear the load, and the first thread bears about 30% of the load. This uneven force will lead to...

AI Technical Summary

Problems solved by technology

This uneven force will lead to severe thread wear of the first few threads with high load, and the relative displacement between the thread contact surfaces will increase, resulting in thread loosening

The use of double nuts has improved the unevenness of the thread load to a certain extent, but in the high-frequency vibration environment of the car, the phenomenon of nut loosening still occurs

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