Tripping driving device

Abstract

The invention relates to a tripping driving device, which belongs to the technical field of circuit breakers. The tripping driving device comprises a shell, a magnetic tripping mechanism arranged in a shell cavity of the shell, and a linkage mechanism hinged on the shell and matched with the magnetic tripping mechanism, wherein the linkage mechanism comprises an iron core push rod, an operating mechanism push rod and a traction pull rod; the traction pull rod and the operating mechanism push rod are matched with each other and are hinged on the shell coaxially, wherein the iron core push rod corresponds to an iron core of the magnetic tripping mechanism; the traction push rod is arranged on one side of the shell and is connected with the iron push rod; and the traction push rod also corresponds to an operating mechanism of a circuit breaker. The tripping driving device has the advantages that the tripping driving device not only is advantageous for simplifying the structure, but also is advantageous for manufacturing and mounting; besides, the integral volume is small to contribute to embody miniaturization.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a trip driving device for actuating an operating mechanism of a circuit breaker. Background technique [0002] The main body of the circuit breaker is composed of a casing, an arc extinguishing system, an operating mechanism, and a trip unit. The trip unit is divided into two types: a thermal magnetic trip unit and an electronic trip unit. The electronic release consists of a data detection processing module and a trip drive device. When a fault is detected or a tripping command is received, the data detection processing module sends out power excitation, and under the power excitation, the tripping drive device drives the tripping mechanism to unlock the tripping mechanism to achieve the purpose of tripping. [0003] As is well known in the industry, the trip driving device should have at least two states, namely the trip state and the pull-in state. The b...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned structure has the following technical problems: one is that the second contact surface 432 of the lock 43 is likely to cause stress concentration, and the lock 43 has a low ability to withstand repeated use and is easily damaged; the other is the number of parts of the linkage mechanism 4 Many, complicated structure, for example, comprise push rod 41, main spring 42, latch 43, main spring locator 44,45, indicator button 46, fixed shaft ( figure 2 Two shown but not labeled with reference signs) and return spring 47, so manufacturing and installation are difficult, and the inspection pass rate of finished products is low

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