Anti-loose assembly

By combining the anti-loosening nut with the ratchet washer, the problem of easy failure of the anti-loosening structure of the horizontal wheel bearing in straddle-type monorail vehicles is solved, achieving a highly efficient and reliable anti-loosening effect, improving disassembly and assembly efficiency and the service life of the ratchet washer.

CN224339318UActive Publication Date: 2026-06-09CHINA RAILWAY NEW COMM INVESTMENT CO LTD (HEFEI)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA RAILWAY NEW COMM INVESTMENT CO LTD (HEFEI)
Filing Date
2025-08-26
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

The existing anti-loosening structure for the horizontal wheel bearings of straddle-type monorail vehicles is prone to failure, leading to bearing detachment. Existing anti-loosening structures are complex, difficult to operate, or do not prevent loosening, and cannot meet the requirements for high reliability.

Method used

The combination structure of anti-loosening nut and ratchet washer is adopted. Through threaded engagement, ratchet engagement and snap ring anti-disengagement engagement, permanent anti-loosening between anti-loosening nut and wheel axle is achieved. The inclined design of ratchet and the limiting component restrict the rotation and axial movement of ratchet washer.

Benefits of technology

It achieves a permanent anti-loosening effect between the anti-loosening nut and the axle, improves disassembly and assembly efficiency and anti-loosening effect, enhances the load-bearing capacity and service life of the ratchet washer, and improves the overall working stability and reliability.

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    Figure CN224339318U_ABST
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Abstract

This utility model relates to an anti-loosening component applied to a wheel axle. The wheel axle surface has an external thread. The anti-loosening component includes an anti-loosening nut and a ratchet washer disposed within the anti-loosening nut. The ratchet washer includes a ring body, at least one first ratchet tooth disposed circumferentially on the ring body, and a clearance portion. A first limiting member is provided between the ring body and the wheel axle. The anti-loosening nut has an internal thread that mates with the external thread and an anti-loosening portion that mates with the first ratchet tooth. A second limiting member is provided on the anti-loosening nut to restrict the axial movement of the ratchet washer. The first ratchet tooth abuts against the anti-loosening portion. When the anti-loosening nut rotates in a first direction, the clearance portion provides deformation space for the first ratchet tooth, causing the first ratchet tooth to deform and pass over the anti-loosening portion, which then prevents the anti-loosening nut from rotating in a second direction. This utility model, through the cooperation of three anti-loosening structures, can achieve a permanent anti-loosening effect between the anti-loosening nut and the wheel axle, improving both the overall disassembly and assembly efficiency and the anti-loosening effect.
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