New Patent: Fastening Device from Nanhang Technology

[Abstract]:According to CNIPA data, Nanhang Technology (Guangdong Hengqin) Co., Ltd. filed the patent A Connecting Fastening Device (Pub. No. CN120926174A) in October 2025 within the fastener technical field.

Preload control and anti-loosening property dominate threaded fastener safety and operational stability. Conventional fastening suffers drastic preload fluctuation and recurrent loosening after long service, posing prominent challenges for construction machinery, aerospace and other high-end sectors with rigorous precision standards. A newly published China patent delivers innovative solutions to tackle prevailing industrial pain points.

Published by CNIPA, Nanhang Technology (Guangdong Hengqin) Co., Ltd. filed the patent titled A Connecting Fastening Device in October 2025, Publication No. CN120926174A. Targeting precision tightening and anti-loosening difficulties, the patented optimized structural design enables accurate preload regulation and effective loosening suppression, elevating reliability across diverse fastener application scenarios.

Its core innovation integrates hydraulic drive with damping anti-loosening, consisting mainly of a hydraulic driving unit and matching adapter socket. Centered on a hydraulic motor for power output, the socket transmits torque: one end tightly couples the motor while the other directly engages threaded fasteners. During tightening, the hydraulic motor rotates the socket along fastening direction; stable hydraulic output locks tightening torque within preset scope and eliminates torque deviation inherent to manual or electric tightening.

The proprietary anti-loosening structure stands out uniquely. When vibration or load variation tends to reverse the socket, residual hydraulic pressure generates counteractive hydraulic torque on the motor to build constant damping and restrict relative thread slippage. Breaking reliance on traditional mechanical anti-loosening configurations, it sustains superior locking performance under dynamic working conditions.

Filling technical gaps in high-end fastening equipment, this patent is poised to upgrade equipment reliability for construction machinery, rail transit and aerospace industries, and fuel high-end transformation of the domestic fastener sector.

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New Patent: Fastening Device from Nanhang Technology

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