A self-locking bolt
By combining the bolt body, external locking frame, and internal locking cylinder, the problem of self-locking bolts loosening under harsh working conditions is solved, achieving efficient fastening and cost control, and expanding the scope of application.
CN224433063UActive Publication Date: 2026-06-30QINGDAO XUANLIN BOYUAN MASCH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO XUANLIN BOYUAN MASCH CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
Existing self-locking bolts are difficult to adapt to harsh working conditions, and the cost is high for small and medium-sized enterprises. The simple or complex traditional structure limits their applicability.
Method used
It adopts a combination design of bolt body, external lock frame and internal lock cylinder. The internal lock cylinder includes an outer expansion layer and a screwing layer. Through the threaded engagement and the engagement of the outer expansion block, a multi-layer locking effect is achieved, which is further locked by the external lock frame.
Benefits of technology
It improves the fastening effect of bolts, reduces processing costs, expands the scope of application, adapts to harsh working conditions, and has a simple structure and low cost.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224433063U_ABST
Abstract
This utility model relates to the field of bolt structure technology, specifically a self-locking bolt. The self-locking bolt includes a bolt body, an outer locking frame, and an inner locking core. The bolt body has a hollow structure, and the inner locking core includes an outward expansion layer and a screwing layer. The inner locking core is placed inside the bolt body, and the outer locking frame is detachably connected to the outside of the bolt body and rotates in the opposite direction to the screwing layer. The bolt is fastened by the three parts, resulting in a stronger fastening effect. Furthermore, the inner locking core is divided into an outward expansion layer and a screwing layer. While being reinforced by threads, the bolt can be expanded outward through the outward expansion layer, further improving the locking effect and ensuring the connection performance of the self-locking bolt. In addition, this application mainly uses multiple threaded structures to overlap and cooperate, which is more compact than traditional self-locking bolts and has a lower structural complexity. It reduces processing costs while ensuring connection performance and expands the scope of application.
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