The anti-loosening structure of the threaded connection between the missile port cover and the missile body

Abstract

The invention relates to the technical field of a fastener structural design, in particular to an anti-loosening structure of threaded connection of a missile covering cap and a missile body. The missile covering cap and the missile body are connected by a covering cap bolt. A screwed bush between the missile covering cap and the missile body is arranged at a connection hole of the missile covering cap and the missile body. The main body of the screwed bush is a sleeve bush with an internal screw thread. The sleeve part of the screwed bush is in interference fit with the connection hole, and after the screwed bush is sleeved into the connection hole, the missile covering cap, the screwed bush and the missile body are sequentially connected by the missile covering cap and the missile body through a fastener. The structure provided by the invention is high in structural reliability, simple in part structure, low in manufacturing cost, free from special tools in assembly and high in batch production efficiency, and not only is the anti-loosening difficult problem of screwed connection of the missile body on the thin wall solved, but also product pieces are installed smoothly.

Description

technical field [0001] The invention relates to the technical field of fastener structure design, in particular to an anti-loosening structure for threaded connection of a missile port cover and a missile body. Background technique [0002] Thread connection is an important connection method on missiles, and is widely used in force-bearing and detachable parts. Screws are commonly used fasteners on missiles. Screws are often used for the opening covers that are subject to little force and need to be disassembled frequently. The general measure is to directly tap the thread on the cabin body. In order to ensure reliable screw connection, the screws are usually required to protrude from the cabin. There are 2 to 3 pitches on the surface of the body, about 2mm. If the design requires that the screws are not allowed to protrude from the inner surface of the bomb bay to allow the component installation channel, then this connection is unreliable, and the screws are easy to loose...

AI Technical Summary

Problems solved by technology

When the finished parts are installed, the outer surface is basically attached to the inner wall of the cabin. In order to be installed into the cabin smoothly, the mounting screw of the hatch cover must be screwed back until the screw rod does not protrude from the inner wall of the cabin. After repeated times, the cabin will be weakened. body thread strength until the wire fails

In addition, most of the missile cabins are thin-walled aluminum alloy cabins, with a typical wall thickness of 3 to 4mm. The effective length of the threads tapped on the cabin to install the cover is less than 3mm. The cover itself is due to missile testing, maintenance, etc. The reason is that it must be disassembled frequently, which will eventually lead to the failure of the connecting thread slide wire on the cabin

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