Shaft structure for anti-fatigue circuit breaker

By using Ni60A+WC and diamond-like carbon coatings, along with TiN reinforcement strips and through-hole support frames on the circuit breaker shaft, the damage problem of the circuit breaker shaft under high-frequency impact loads and alternating stresses was solved, thereby improving fatigue resistance and accelerating response speed.

CN224554300UActive Publication Date: 2026-07-24CHANGSHU BANGTAI METAL PROD CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHANGSHU BANGTAI METAL PROD CO LTD
Filing Date
2025-07-05
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

The shaft of the circuit breaker operating mechanism is easily damaged when subjected to high-frequency impact loads, alternating bending stress, and fretting wear, which affects the operation of the equipment. Existing technologies have not been able to effectively solve this problem.

Method used

The output shaft body is reinforced with Ni60A+WC composite material and diamond-like carbon material coating, and TiN reinforcement strips and through-hole support frames are set in specific parts to improve the shaft's strength and wear resistance, reduce fretting wear, inhibit fatigue crack initiation, and reduce inertial force to improve response speed.

Benefits of technology

It significantly extends the service life of the circuit breaker shaft, reduces the fretting wear rate, prevents fatigue spalling, and improves the circuit breaker's operating response speed and overall performance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of shaft structures for fatigue-resistant circuit breaker, including output shaft main body, the output shaft main body outside is provided with reinforcing component, the reinforcing component includes the coating one being arranged in the output shaft main body outside, the coating one is made of Ni60A+WC composite material, the coating one outside is provided with coating two, the coating two is made of diamond-like carbon material, the output shaft main body outside is provided with several reinforcing bands, the reinforcing band is prepared using TiN material, the output shaft main body middle position is provided with through hole, the through hole inside is fixedly connected with support frame, the output shaft main body and support frame are made using 17-4PH stainless steel material, the coating one thickness is 80-120 μm, the utility model is provided with reinforcing component, can greatly improve the overall strength of output shaft main body, effectively avoid the emergence of damage due to use time increase, beneficial to increase the service life of output shaft.
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