Automatic opening and closing device of small circuit breaker

Abstract

The invention relates to an automatic opening and closing device for a small circuit breaker, which includes a base, a cover, a transmission mechanism, a control circuit board installed on the base, and an action connecting rod. The transmission mechanism includes a transmission motor and a reduction gear set. The driving bevel gear arranged at the end of the reduction gear set of the transmission motor, the driven bevel gear meshed with the driving bevel gear, the opening and closing gear which is arranged on the upper part of the driven bevel gear and driven by the driven bevel gear, and the middle part of the opening and closing gear is set There is a transmission link, which passes through the installation base and is connected to the operating handle of the miniature circuit breaker to be controlled. An action lever is vertically arranged at the end of the action link, and the action lever reaches directly to the side of the assembled miniature circuit breaker. In the arc-shaped groove, the small circuit breaker cannot be closed manually when it is in the opening position. The invention has the advantages of simple structure and reliable operation, and is an ideal accessory for long-distance automatic opening and closing of the small circuit breaker.

Description

technical field [0001] The invention relates to a low-voltage electrical appliance, in particular to an automatic opening and closing device for a small circuit breaker. Background technique [0002] Miniature circuit breakers, also known as miniature circuit breakers, are widely used in electrical circuits for overload, short circuit, overvoltage, and undervoltage protection. Due to the emergence of smart grids, the opening and closing of miniature circuit breakers must have the function of remote automatic control, so This kind of automatic control device attached to one side of the miniature circuit breaker has appeared one after another. At present, there are mainly two types of control devices for automatic opening and closing of miniature circuit breakers, one is driven by worm gear, and the other is driven by bevel gear. . [0003] Chinese patent document CN105304421A discloses a control drive device for a small circuit breaker, which is driven by a worm gear. The t...

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Problems solved by technology

[0004] Chinese patent document CN104576235A discloses an automatic reclosing device for a small circuit breaker, which is driven by a bevel gear. The technical solution it adopts is: including a base, an upper cover, a transmission mechanism, a tripping mechanism, and an electronic control device. The transmission mechanism adopts bevel gears and bevel gears meshed with bevel gears. During work, the forward and reverse rotation of the motor is controlled through the connecting shaft connected to the operating handle of the miniature circuit breaker set on the end face of the bevel gear to realize the opening and closing of the miniature circuit breaker. The purpose of the gate, but a special tripping mechanism composed of electromagnets is set up to realize the long-distance automatic reclosing, which makes the device still relatively complicated

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