Non-equal-pitch double-nut anti-loosening mechanism

Through the non-equal pitch double nut anti-loosening mechanism and the nut interference self-locking mechanism, the problem of thread loosening of the servo actuator feedback potentiometer in complex environments is solved, achieving high reliability and simple thread connection, which is suitable for precision parts in closed cavities.

CN120720320APending Publication Date: 2025-09-30NANJING CHENGUANG GRP
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Patent Information

Application Number
CN202510968204.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-14
Publication Date
2025-09-30

AI Technical Summary

Technical Problem

In the existing technology, the feedback potentiometer of the servo actuator is prone to mechanical zero position deviation due to loose threads in complex mechanical environments, affecting the reliability and normal operation of the actuator. Commonly used anti-loosening measures such as welding and double nuts have complex processes or loosening risks and cannot effectively solve the loosening problem.

Method used

The unequal pitch double nut anti-loosening mechanism is adopted. By adjusting the design of the nut and the locking washer, the interference generated by nuts with different pitches during movement is utilized to achieve self-locking. Combined with the cooperation of the locking plate and the array groove, the stability of the threaded connection is ensured.

Benefits of technology

It achieves the reliability and stability of threaded connections in complex mechanical environments, simplifies operations, reduces process complexity, and is suitable for threaded connections of precision parts in closed cavities.

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Abstract

The invention discloses a non-equal-pitch double-nut anti-loosening mechanism which is suitable for the field of internal thread connection positioning anti-loosening in a complex mechanical environment. The anti-loosening mechanism comprises an adjusting nut, a check nut, a locking gasket and a connecting threaded hole. The locking gasket adopts a special design of a hexagonal boss and a locking piece, and is locked and matched with the adjusting nut and the check nut, so that the double nuts are fixedly connected, and co-rotation angle limitation is realized; under the condition of the same loosening displacement, the non-equal-pitch double nuts rotate the angle barrel to cause motion interference, the axial and circumferential motion amount of the fixedly connected double nuts is limited, reliable looseness prevention of the structure is achieved, and looseness prevention mechanism formula analysis is completed; meanwhile, a design method is provided for the deformation of the locking gasket, the width of a tool withdrawal groove and other structural sizes according to the application situation, and the use scene is expanded.
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