Multi-interlayer detachable pin locking thread assembly for blind hole and locking method

Abstract

The invention relates to a multi-interlayer detachable pin locking thread assembly for a blind hole. The multi-interlayer detachable pin locking thread assembly for the blind hole comprises a screw located outside and an adjustment pin located inside, wherein an axial throughout adjustment pin hole is formed in the center of the screw, and the adjustment pin is located in the adjustment pin hole; the adjustment pin comprises an adjustment rod, an adjustment end socket is arranged at one end of the adjustment rod, and a stop tail is arranged at the other end of the adjustment rod; a plurality of adjustment tooth posts are arranged on a rod body of the adjustment rod at intervals; a groove for containing the adjustment end socket of the adjustment pin is formed in the outer end of the adjustment pin hole in a flaring mode, and the stop tail blocks the other end of the adjustment pin hole; a plurality of groups of stop pin holes are formed inside the screw in the axial direction, the number of the groups is equal to the number of the adjustment tooth posts, and the outer ends of the stop pin holes are communicated with the outside; stop pins are arranged in the multiple groups of stop pin holes; each stop pin comprises a pin rod, adjustment teeth are arranged on the outer wall of each pin rod and connected with the corresponding adjustment tooth post in an engaged mode, and the stop pins stretch out and draw back in the respective stop pin holes when the adjustment pin rotates. The invention further relates to a locking method.

Description

technical field [0001] The invention belongs to the technical field of connectors of threaded components, and in particular relates to a detachable pin-locked threaded component for multi-layered blind holes, and also relates to a locking method using the above-mentioned threaded component. Background technique [0002] In the design of aerospace vehicle parts, a large number of fasteners are usually used as the connection between components, and high-performance fasteners are very expensive. Aerospace vehicles are vibrating all the time during flight, and the vibration will lead to loosening. Therefore, parts are required to have a locking function to effectively control the safety hazards caused by loose parts, which greatly improves the safety requirements of parts. . At present, the locking of blind holes is mainly to use rubber to protrude from the thread of the bolt to produce self-locking, which cannot meet the requirements for high-temperature fields; rubber materia...

AI Technical Summary

Problems solved by technology

At present, the locking of blind holes is mainly to use rubber to protrude from the thread of the bolt to produce self-locking, which cannot meet the requirements for high-temperature fields; rubber materials are easy to age, and will age and fail after working for a long time under high temperature conditions. hidden dangers to the safety of the device; at the same time, it can only be self-locked and cannot be locked

When multiple interlayers are required to be locked at the same time, the current conventional fasteners cannot meet the installation requirements

To meet the flight safety requirements, the bolts must be replaced in a short time, which results in poor economy, increased cost and inconvenient assembly and disassembly.

The aging and invalid rubber scraps will affect the next installation

There are also self-locking methods such as changing the pitch, or reverse processing several threads, etc., all of which have limitations and cannot be locked.

On high-speed aircraft such as aerospace vehicles, the requirements for safety and reliability are extremely strict, and a slight difference will cause disastrous consequences. Ordinary self-locking bolts cannot meet the applications under these harsh conditions.

It cannot meet the requirements in terms of safety and reliability, because of its poor safety and reliability, it often leads to low flight safety factor and high maintenance cost of aerospace vehicles

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