Rotating shaft structure of double-breakpoint molded case circuit breaker

The integrated shaft structure design solves the problem of poor multi-phase synchronization of traditional circuit breaker shafts, achieving three-phase synchronization consistency of the circuit breaker and improving the safety and electrical life of the circuit breaker.

CN224053117UActive Publication Date: 2026-03-27ANDELI GRP
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Patent Information

Application Number
CN202620223506.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2026-02-25
Publication Date
2026-03-27
Estimated Expiration
2036-02-25

AI Technical Summary

Technical Problem

The existing traditional double-break molded case circuit breaker has problems with the shaft structure due to processing errors and inconsistent materials, resulting in poor multi-phase synchronization, affecting the closing and opening of the moving and stationary contacts, causing burn-out, and affecting the operational safety of electrical systems and equipment.

Method used

The rotating shaft body adopts an integrated design and has a radial contact groove and an axial placement groove inside. The moving contact is inserted into the contact groove. The static and moving spring shafts and the contact spring use elastic tension to make the moving contact stably abut against the inner side wall of the groove, ensuring three-phase synchronization.

Benefits of technology

It improves the ultimate breaking capacity and operational breaking capacity of the circuit breaker, enhances safety and reliability, and extends electrical life.

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Abstract

The utility model relates to the technical field of circuit breaker structures, in particular to a rotating shaft structure of a double-breakpoint molded case circuit breaker, which is characterized in that a rotating shaft main body is of an integral structure design, a contact groove is formed in the rotating shaft main body along the radial direction, the middle part of a moving contact is inserted into the contact groove, and two ends of the moving contact penetrate out along an opening of the contact groove; the static spring shaft and the moving spring shaft are used for being in butt joint with the static contact, the static spring shaft and the moving spring shaft are located on the two sides of the moving contact respectively, the two ends of the contact spring are connected to the static spring shaft and the moving spring shaft respectively, and the moving spring shaft is pulled through elastic tension of the contact spring so that the two sides of the moving contact can abut against the inner side wall of the contact groove respectively. Due to the integral structure design of the rotating shaft main body, the three-phase synchronism of the molded case circuit breaker is consistent, the limit breaking capacity and the operation breaking capacity of the circuit breaker are greatly improved, the safety and the reliability of the circuit breaker in operation are improved, and the electrical life of the circuit breaker is prolonged.
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