Breaker manipulator

Abstract

The invention discloses a part of a breaker, and particularly relates to a breaker manipulator. The breaker manipulator comprises a manipulator and a push rod connected with a vacuum arcing chamber moving contact part, wherein the manipulator swings around an installation supporting point; the upper end of the manipulator is provided with a semispherical indentation, the rear end of the push rod passes through a cross-under hole arranged at the center of the semispherical indentation and is a spacing nut, and a compression spring is pressed between the manipulator and a step at the middle part of the push rod; and a wear-resistant block is arranged on the semispherical indentation and matched with the semispherical indentation, the center of the wear-resistant block is provided with a center hole through which the push rod can pass, and rear end of the compression spring is pressed on the front end face of the wear-resistant block. By utilizing the structure, the compression spring is contacted with the manipulator through the wear-resistant block in a breaker manipulator swinging process so as not to generate friction on the manipulator, the abrasion is effectively reduced, the transferring accuracy is ensured, and the working parameter stabilization of the breaker is improved.

Description

technical field [0001] The invention relates to a component of a vacuum circuit breaker, in particular to a circuit breaker operating arm. Background technique [0002] Vacuum circuit breakers generally use a swinging operating arm to drive a push rod connected to the moving contact to achieve closing action. A compression spring is usually pressed between the operating arm and the pushing rod to generate pre-pressure on the contacts. The contact part of the compression spring and the operating arm is usually provided with a hemispherical depression, and during the swinging process of the operating arm, the root of the compression spring slides on the hemispherical inner surface to reduce resistance. Although this structure can realize the smooth transition of the spring during the swinging process of the operating arm, the contact between the spring and the inner surface of the hemispherical shape is not smooth, and still has a large friction force, and the movement will ca...

AI Technical Summary

Problems solved by technology

Although this structure can realize the smooth transition of the spring during the swinging process of the operating arm, the contact between the spring and the hemispherical inner surface is not smooth, and there is still a large frictional force, and the movement will cause the contact part of the operating arm to wear out, resulting in The size of the vacuum circuit breaker and the change of the spring force have a great impact on the opening and closing parameters of the vacuum circuit breaker, which reduces the working stability of the circuit breaker

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