A wing folding and unfolding mechanism with a limiting protection function and an aircraft

By combining the limiting strut and the limiting block with the flexible buffer design of the screw and nut pair, the problem of wing collapse under impact in traditional transmission mechanisms is solved, achieving stable limiting protection of the wing and extending the service life of the servo motor, simplifying the mechanism and reducing weight.

CN122402767APending Publication Date: 2026-07-17HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-20
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional transmission mechanisms lack physical self-locking capability. When not powered on, external impact forces can easily cause the wings to collapse or deform, making it impossible to maintain the wing's attitude and affecting the service life of the servo motor.

Method used

The design employs a limit strut and limit block, utilizing the cooperation between the upper and lower limit surfaces of the limit strut and the limit block to achieve wing self-locking. Combined with the lead screw and nut pair and the buffer spring, it achieves flexible buffer deceleration and avoids the transmission of impact load to the servo motor.

Benefits of technology

The wing provides stable limiting protection at extreme positions, blocks impact loads, extends the life of the servo motor, simplifies the mechanism configuration, reduces weight, and improves operational stability and endurance.

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Abstract

The application discloses a wing folding and unfolding mechanism with a limiting protection function and an aircraft, and belongs to the technical field of the aircraft. At present, the aircraft wing is subjected to severe instantaneous fluid impact when entering water, which easily leads to the deformation and loosening of the folding structure, poor self-locking reliability, and the impact load is easily transmitted to the rudder machine through the transmission mechanism, thereby causing the impact damage of the rudder machine and shortening the service life. The application comprises a supporting limiting frame, a power output module and a transmission unit, the supporting limiting frame is provided with a plurality of limiting support columns with upper and lower limiting surfaces; the power output module is installed on the supporting limiting frame and provides a wing unfolding and folding driving force; a plurality of transmission units are circumferentially arranged and correspond to the wing and the limiting support column respectively, the wing is driven to turn up and down to realize unfolding and folding; each transmission unit is provided with a limiting block capable of synchronously swinging with the wing, when the wing reaches the unfolding and folding limit position, the limiting block abuts against the limiting surface of the limiting support column, thereby realizing the wing limiting self-locking and protection, and the application is suitable for the stable unfolding and folding of the aircraft wing.
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