A limit device for three-position switch operating mechanism

Abstract

The invention discloses a limiting device for a three-position switch operating mechanism. The limiting device comprises a connecting rod, one end of the connecting rod is provided with a roller, and the other end of the connecting rod is hinged to the free end of an output shaft connecting lever. The output shaft connecting lever is arranged at the end of an output main shaft in a sleeved mode, and the free end of the output shaft connecting lever is connected with a reset piece. A strip-shaped hole is formed in a first partition plate used for supporting the output main shaft, and the length direction of the strip-shaped hole is accordance with the extension direction of the output shaft connecting lever when the output shaft connecting lever is placed at an isolating position. The roller is arranged in the strip-shaped hole and can slide in the length direction of the strip-shaped hole. The positions where the roller and the two ends of the strip-shaped hole are matched correspond to the isolating position and a ground communicated or connected position respectively. A first limiting part is arranged in the strip-shaped hole. According to the limiting device for the three-position switch operating mechanism, movement of the roller in the strip-shaped hole is limited through the first limiting part, and therefore the output main shaft can be accurately limited at the ground communicated or connected position. In addition, friction between the roller and the strip-shaped hole can be lowered to the largest extent, the service life is prolonged, and meanwhile the output precision is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of high-voltage switches, in particular to a limit device for a three-station switch operating mechanism. Background technique [0002] In recent years, with the continuous advancement of high-voltage switchgear technology, gas-insulated metal-enclosed switchgear has developed towards miniaturization, compounding, multi-functional components, and intelligence. The isolation switch and the grounding switch are combined into a three-station isolation / grounding switch , Can save the electrical operation interlock, realize the natural mechanical interlock, there is no misoperation between the isolation switch and the grounding switch. As the name implies, the three-position switch needs to switch between the three positions of the on position, the isolation position, and the ground position. This puts forward the three-position switch operating mechanism with accurate output angle, reliable limit and each state switc...

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem that the present invention primarily solves is that the existing three-position mechanism uses a limit device to limit the position inaccurately, and the output spindle can still rotate at a certain angle when it is rotated to the ground position, connection position or isolation position, thereby affecting the rated short circuit of the switch. Current withstand capability and safe insulation distance

Images