A manually adjustable fan for mine cars

By designing a mechanical transmission system for a manually adjustable fan in a mining car, the problem of traditional fans being unable to adjust the blade angle of attack under high load conditions was solved, enabling rapid and precise adjustment even when the machine is stopped, thus improving the fan's applicability and reliability in special environments.

CN224380178UActive Publication Date: 2026-06-19JCC YINSHAN MINING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JCC YINSHAN MINING CO LTD
Filing Date
2025-07-31
Publication Date
2026-06-19

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Abstract

This utility model relates to the field of cooling fans, specifically disclosing a manually adjustable fan for mining cars. It includes a shaft head with blades evenly distributed on its outer side, fixedly connected to the shaft head. Inside the shaft head are driven gears coaxially connected to the blades and a central gear meshing with them. The core of the adjustment mechanism is a compound adjustment shaft. The user applies axial force to the compound adjustment shaft using a hex wrench to unlock the locking structure between the central gear and a cylindrical sleeve. Then, turning the wrench drives the central gear to rotate via the compound adjustment shaft. Since the central gear meshes with all driven gears, this operation synchronously drives all blades to change their angle of attack uniformly. After adjustment, releasing the wrench resets the locking structure, locking the angle of attack. This design eliminates the need for a complex electrical control system and allows for rapid, synchronous manual angle of attack adjustment even when the fan is stopped.
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