Anti-loose outer hexagonal bolt

CN224396894UActive Publication Date: 2026-06-23QINGDAO JIATENG NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
QINGDAO JIATENG NEW MATERIAL CO LTD
Filing Date
2025-06-19
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing expandable deformation bolt structures are prone to breakage under high loads and have poor expansion uniformity, affecting the anti-loosening effect and posing safety hazards, especially in vibration and impact environments.

Method used

Design an anti-loosening hexagonal bolt with an internal expansion hole and deformation groove at the end of the stud. The internal expansion head is threaded to the stud. By tightening the internal expansion head, the material in the deformation groove expands, forming a stable interference fit, increasing friction and preventing loosening.

Benefits of technology

It improves the overall strength and load-bearing capacity of the bolts, prevents the nuts from loosening, simplifies the assembly process, avoids the risk of fracture in hollow structures, and significantly enhances the anti-loosening effect.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a kind of external hexagonal bolt of anti-loosening, including stud, screw head, nut, inner inflation hole, internal thread, inner inflation head and deformation groove, the stud and screw head are integrally set together, the stud is threadedly installed with nut, one end is provided with inner inflation hole, internal thread and deformation groove, the inner inflation head is threadedly connected with the internal thread of stud setting;The utility model improves strength by solid stud (no through hole);Circular array deformation groove cooperates conical inner inflation head, evenly expands to form stable interference when screwing, and the anti-loosening is superior to traditional;Inner inflation head integrally designed, screw rod is directly connected with internal thread, and installation is simple, stress is uniform.
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