Deceleration transmission mechanism for three-position isolating switch and control method thereof

Abstract

The invention relates to a gearing-down mechanism applied to a three-station isolation switch and a control method thereof. The gearing-down mechanism comprises a first gear and a second gear, wherein the first gear and the second gear successively fixedly sleeve the output shaft of an insulation screw. The first gear and the second gear share the same number of teeth. The teeth of the first gear and the second gear are one-to-one corresponding to each other. The gearing-down mechanism further comprises a third gear in matching transmission with the first gear and the second gear. The third gear is meshed with a fourth gear. The number of the teeth of the fourth gear is large than the number of the teeth of the first gear. The output shaft of the fourth gear is connected with a cam. The cam is connected with a travel switch in a matching manner. The travel switch is fixed on the side of the fourth gear. The gearing-down mechanism provided by the invention has the advantages that the travel of an isolated movable contact is calculated by the gearing-down mechanism, and the speed of closing or grounding can be easily controlled.

Description

technical field [0001] The invention relates to the field of mechanical control, in particular to a travel switch reduction transmission mechanism and a control method thereof. Background technique [0002] In recent years, with the continuous maturity and improvement of switch technology, three-position switches have become more and more common. The three-position switch is often used in fully enclosed combined electrical appliances (GIS) or composite electrical appliances (PASS), and is not a separate product. Especially in XGN ring network cabinets, the existing three-position isolating switch generally has two structures: direct-acting and switch-knife. In the direct-acting three-position isolating switch, the middle position is the isolation position, and the two ends are respectively Closed and grounded positions. Driven by the insulating screw, the moving contact at the middle isolation position moves toward the extreme positions at both ends, so as to make full con...

AI Technical Summary

Problems solved by technology

Driven by the insulating screw, the moving contact at the middle isolation position moves toward the extreme positions at both ends, so as to make full contact with the static contacts at both ends, respectively realizing closing and grounding, but the moving contact moves directly through the rotation of the insulating screw, directly The moving stroke is large, the number of rotations of the insulating screw is too large, and the signals of closing, isolation and grounding cannot be output well.

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