A circuit breaker opening anti-bounce device

Abstract

The invention relates to a circuit breaker switching-off bounce prevention device, which comprises a main shaft, locking members, cantilevers, a gear lever, tension springs and a countershaft, wherein the cantilevers are welded on the main shaft; the locking members are connected on the cantilevers; the gear lever is located under the cantilevers; one end of each tension spring is hung on the countershaft, and the other end is hung on the corresponding cantilever; and the locking members are hook-shaped locking members, a hook-shaped structure is formed in the front end of each locking member, and the shapes of the hook-shaped structures enables meet the demand that the hook-shaped structures can be hung or hooked on the gear level. Compared with the prior art, an improved design of a conventional locking member structure is provided, the end parts of the locking members are configured to be in a hook-like shape, thus the position of the mass center of each locking member mass is successfully changed, the amplitudes of downward swinging of the locking members are effectively increased by utilizing the inertial effect, and since the locking members are designed into a hook shape, the hook-shaped structures of the locking members can be hooked on the gear level during the downward swinging process of the locking members, thus the bounce of a moving contact of the circuit breaker is blocked forcibly.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an anti-bounce device for opening a circuit breaker. Background technique [0002] Since the circuit breaker is opened at a very high speed, and the circuit breaker mechanism is made of rigid materials, if the general low-voltage circuit breaker does not have an anti-rebound device, the moving contact will rebound during the process of opening, and too much Springback will make the distance between the moving contact and the static contact too close, causing the arc to reignite, causing the moving contact and the static contact to burn out, and even causing more serious consequences. Therefore, solving the excessive rebound distance of the moving contact during the opening process of the circuit breaker has always been a key research problem in the low-voltage electrical industry. Too big a problem. [0003] Although the industry has been w...

AI Technical Summary

Problems solved by technology

This known anti-bounce device can sometimes play the role of anti-bounce when short-circuiting large currents, but the reliability is not high; it can hardly work when short-circuiting small currents

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