Three-position operating mechanism with buffering function

Abstract

The invention discloses a three-position operating mechanism with a buffering function. The three-position operating mechanism comprises a mechanism front plate, a mechanism rear plate, an output shaft module, a grounding side closing and separating module, an isolation side closing and separating module, a spring module and a buffering module. All the modules are assembled between the mechanism front plate and the mechanism rear plate. The output shaft module comprises an output shaft, an output shaft crank arm and a driving pull rod. The output shaft is arranged on the middle part of the mechanism rear plate. The grounding side closing and separating module and the isolation side closing and separating module are distributed at the two sides of the output shaft with the output shaft acting as the center. The output shaft crank arm is pivotally connected on the output shaft. The buffering module is fixed on the mechanism rear plate. One end of the buffering module abuts against the external side of the output shaft crank arm. An insulation fault caused by overshooting in separating can be prevented so that the safety of operation can be enhanced.

Description

technical field [0001] The invention relates to a three-station operating mechanism, in particular to a three-station operating mechanism with a buffer function. Background technique [0002] The so-called three-position refers to three working positions: first, the closing position where the main break of the isolation switch is connected; second, the isolation position where the main break is separated; third, the grounding position on the grounding side. The three-position switch integrates the functions of the isolating switch and the grounding switch, and is completed by a knife switch, so that mechanical locking can be realized to prevent the main circuit from being electrified and grounding. [0003] like figure 1 and 2 As shown, there is an existing three-position operating mechanism, which includes a mechanism front plate 1, a mechanism rear plate 2, an output shaft module 4, a grounding side closing and opening module 5, an isolation side closing and opening modu...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned three-position operating mechanism also has the following defects: when the isolation side is opened, the output shaft 41 and the output shaft crank arm 42 turn overshoot to cause an insulation fault, mainly because when the isolation switch rotation point is on the bus side, the isolation switch from closing When the position is opened to the opening position, the distance between the isolation knife and the grounding position will be too close due to overshoot, resulting in insulation failure.

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