A connecting mechanism lower connector

By using a milling process for the integrally formed connecting cylinder, fork-shaped wings, and reinforcing ribs, the force transmission path of the lower joint is optimized, solving the problems of metal welding and casting defects in the existing technology, and realizing a lightweight and highly reliable connection structure design.

CN224588875UActive Publication Date: 2026-08-04HAINAN AIRLINES LAND MACHINERY (CHONGQING) TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202522244689.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-23
Publication Date
2026-08-04
Estimated Expiration
2035-10-23

AI Technical Summary

Technical Problem

The lower joint of the existing low-altitude aircraft connection module is prone to deterioration of the mechanical properties of the metal material during the welding process, and residual stress concentration is likely to occur inside the structure. In addition, the cast structure is heavy and prone to porosity and shrinkage defects, which affect the fatigue performance and safety of the structure.

Method used

The connecting cylinder, fork-shaped wings, and reinforcing ribs are manufactured using a one-piece molding process and milling. Combined with a variable thickness design and annular boss connecting holes, the force flow transmission path is optimized, welding defects and material performance degradation are avoided, and the overall structural integrity and fatigue resistance are enhanced.

Benefits of technology

It significantly improves the stress concentration problem of the lower joint, enhances the stability and durability of the structure, extends the service life, and reduces weight and operating energy consumption.

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Abstract

This utility model relates to the field of joint connections and discloses a lower joint of a connection mechanism. The lower joint includes a connecting cylinder, a fork-shaped wing, and reinforcing ribs. The connecting cylinder is fixed to the top of the fork-shaped wing and is used to connect with a lifting rod. The fork-shaped wing is used to connect with a crossbeam. The reinforcing ribs longitudinally span across the connecting cylinder and the fork-shaped wing. Reinforcing ribs are provided on both sides of the lower joint and are symmetrical to each other. This component adopts a one-piece milling forming process. Its symmetrical reinforcing rib design optimizes the force flow path and significantly reduces stress concentration between the connecting cylinder and the fork-shaped wing. At the same time, the milling process eliminates defects such as internal porosity and shrinkage, thereby comprehensively improving fatigue resistance and service life.
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