Self-locking screw

Abstract

The invention relates to the technical field of screws, and discloses a self-locking screw. The self-locking screw comprises a first nut, a second nut, a third nut, a fourth nut, a connecting rod, a first slotted key, a second slotted key, a connecting piece A and a connecting piece B, wherein three first key grooves are formed in the upper part of the connecting rod at equal intervals, a second key groove is formed in one side of the lower part of the connecting rod, a third key groove is formed in one side of the interior of the first nut, a threaded hole is formed in the middle of the second slotted key, the third key groove of the first nut is connected with the second key groove of the connecting rod through the first slotted key, and three wrapping grooves are formed in the interiorof the upper end of the fourth nut at equal intervals. The self-locking screw is novel in structure, more rapid and convenient to mount and dismount and high in structural looseness prevention performance, vibration force can be converted into locking force of the nut in a using process, the larger the vibration force is, the higher the clamping force is, the better the stability is, and the self-locking screw is suitable for application and popularization.

Description

technical field [0001] The invention relates to the technical field of screws, in particular to a self-locking screw. Background technique [0002] The screw is a tool for tightening the parts of the object step by step by using the physical and mathematical principles of the oblique circular rotation and friction of the object. A screw is a general term for a fastener. Screw is an indispensable industrial necessity in daily life: the tiny screw used in cameras, glasses, clocks, electronics, etc.; the general screw for TV, electrical products, musical instruments, furniture, etc.; Screws and nuts; transportation equipment, airplanes, trams, automobiles, etc. are used together with large and small screws. Screws have important tasks in industry. As long as there is industry on the earth, the function of screws will always be important. [0003] The current common screws mainly have the following problems when locking the connectors: [0004] 1. When the common thread is c...

AI Technical Summary

Problems solved by technology

[0004] 1. When the common thread is connected and used, the screw tooth in the thread pair composed of the external thread and the internal thread changes suddenly due to the position of the cross section, and the stress concentration leads to poor tooth root strength and the problem that the thread of the common thread fastener is easy to be bruised;

[0005] 2. When the common thread is connected and used, the screw connection is prone to loosening under external vibration, and the durability is poor.

[0006] 3. Common threads have problems such as uneven distribution of force on each thread, tripping and seizure;

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