Anti-rebound operating mechanism

By employing a combination of blocking and stop components in the circuit breaker, and utilizing the impact structure to create a dead point to prevent the main shaft from rebounding, the rebound problem of the circuit breaker during short-circuit current interruption or normal tripping is solved, improving interruption performance and reliability, and simplifying the installation process.

CN122117703APending Publication Date: 2026-05-29CHINT LOW VOLTAGE ELECTRICAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINT LOW VOLTAGE ELECTRICAL TECH CO LTD
Filing Date
2024-11-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

When the existing circuit breaker interrupts a short-circuit current or normally opens, the main shaft rebounds, causing the arc to not be extinguished in time or to reignite, affecting the interruption performance. Furthermore, the existing anti-rebound structure is prone to failure, has poor reliability, and is complex to install.

Method used

The design employs a combination of blocking and stop components. By using the impact structure and the blocking part to form a dead point, the spindle is prevented from rebounding, thus avoiding the use of a return spring, simplifying the structure and improving reliability.

Benefits of technology

It effectively prevents spindle springback, improves the circuit breaker's breaking performance, simplifies the installation process, and enhances the reliability and ease of use of the operating mechanism.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN122117703A_ABST
    Figure CN122117703A_ABST
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Abstract

The anti-rebound operating mechanism comprises a main shaft rotatably arranged on a side plate, the main shaft is used for being connected with a movable contact and being rotatable between a closed position and an open position, and the anti-rebound operating mechanism further comprises a rotatably arranged blocking piece, the main shaft is provided with a stop piece rotating with the main shaft, the blocking piece is provided with at least one blocking part and at least one avoiding part, the stop piece is provided with a striking structure and a pushing structure, when the main shaft rotates from the closed position to the open position, the pushing structure of the stop piece pushes the blocking piece to rotate so that the blocking part rotates to an anti-rebound position, when the blocking part is in the anti-rebound position, the blocking part is located on a rotating path of the striking structure when the main shaft rotates from the open position to the closed position, and the blocking part is located between the rotating center of the blocking piece and the striking structure, when the main shaft rebounds in the open position, the striking structure abuts against the blocking part to form a dead point to prevent the main shaft from rebounding, and the inertia is not needed to prevent the main shaft from rebounding.
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