Self-locking nut and installing method thereof

Abstract

The invention provides a self-locking nut. The self-locking nut comprises a body part and a riveting part, wherein the body part and the riveting part are annularly and integrally connected. The innerdiameter of the riveting part is larger than or equal to that of the body part, an internal thread is arranged on the inner wall of the body part, an external thread is arranged on the outer wall ofthe body part, and the riveting part is subjected to annealing treatment. The nut can be installed on a thin-wall part of a shell in a narrow space, can realize self-locking and multi-period circulation, is resistant to vibration, can bear large axial loads, is convenient to install, and will not rotate when a bolt is screwed into or screwed out.

Description

technical field [0001] The invention belongs to the field of aerospace fasteners, and in particular relates to a self-locking nut with excellent anti-shock and anti-loosening locking performance and an installation method thereof. Background technique [0002] Aerospace equipment shells and narrow installation parts often use wire threaded sleeves and riveting nut fasteners to solve the thin-walled shells that are easy to deform, crack, and inconvenient to install. Repeated operations such as disassembly and installation often cause shell walls to be damaged The problem of sabotage causing heavy losses. [0003] Although the wire thread sleeve can solve the problem of installation in narrow parts and thin-walled parts of the shell, it cannot bear large axial force and cannot realize the self-locking function. When removing the bolt, the wire thread sleeve is often very easy to follow the bolt together Being screwed out of the installation site, causing equipment accidents. ...

AI Technical Summary

Problems solved by technology

[0002] Aerospace equipment shells and narrow installation parts often use wire threaded sleeves and riveting nut fasteners to solve the thin-walled shells that are easy to deform, crack, and inconvenient to install. Repeated operations such as disassembly and installation often cause shell walls to be damaged The problem of sabotage causing heavy losses

[0003] Although the wire thread sleeve can solve the problem of installation in narrow parts and thin-walled parts of the shell, it cannot bear large axial force and cannot realize the self-locking function. When removing the bolt, the wire thread sleeve is often very easy to follow the bolt together Being screwed out of the installation site, causing equipment accidents

Although the riveting nut can also solve the problem of installation in narrow parts and thin-walled parts of the shell, it cannot bear large axial force and cannot realize the self-locking function, and there are requirements for the wall thickness of the installation part, and the installation wall is too thin It cannot be installed if it is too thick, and the more important thing is that the riveting nut is very easy to rotate with the bolt when the bolt is screwed in and out, which leads to two problems. The installation torque and pretightening force stipulated in the standard, on the other hand, due to the rotation of the riveting nut during disassembly, the bolts are difficult to remove

Other types of nuts either cannot be installed in a narrow place, or cannot be installed on one side, or the thread and the body of the installation part are damaged after installation, or special treatment is required after installation, and they cannot meet the special requirements of the aerospace installation part.

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