Control method for switching mechanism

Abstract

The invention relates to a control method for a switching mechanism. According to the control method, a power source, a motor, a closing switch, an opening switch and a micro switch constitute a closed circuit. The control method mainly includes the following steps that the motor is powered on to drive a reduction gear set which is meshed with the motor to rotate; the reduction gear set drives a first gear which is meshed with the reduction gear set to rotate, and a cam mounted on the reduction gear set is made to rotate; an arc-shaped shifting block on the cam shifts a rotating member of the switching mechanism to rotate or revolving member to rotate; the rotating member drives a handle on the switching mechanism to rotate or the revolving member touches the switching mechanism to be disengaged after the revolving member rotates; a lever on the micro switch can rotate around a point of the micro switch, a contact a, a contact b and a contact c of the micro switch are changed, and thus the switching mechanism can be closed or opened automatically. The control mode is quite economical and simple and is beneficial to lowering the cost and promoting the market expansion of products.

Description

technical field [0001] The invention relates to the technical field of electrical switches, in particular to a control method for a switch mechanism. Background technique [0002] Miniature circuit breaker, referred to as MCB, is the most widely used terminal protection device in electrical terminal power distribution devices. It is used for single-phase and three-phase short-circuit, overload, and overvoltage protection below 125A, including single-pole 1P, Two-pole 2P, three-pole 3P, four-pole 4P, etc., for example, miniature circuit breakers are basically used in the terminals of low-voltage power distribution. At present, with the continuous improvement of various indicators of miniature circuit breakers, its applications are becoming more and more extensive, but the requirements for its performance and automatic operation are also getting higher and higher. [0003] The electric operating mechanism of the circuit breaker is an accessory used for remote electric opening...

AI Technical Summary

Problems solved by technology

However, in order to ensure the correct operation sequence, its structure and control are more complicated, the reliability is low, and the cost is high.

[0004] The existing switch mechanism control device, such as the Chinese patent application (application number: 201120291912.0) discloses a transmission mechanism of the electric operating mechanism of the miniature circuit breaker. The technical solution adopted is that the electric operating mechanism of the circuit breaker includes There is a casing, a driving motor is installed in the casing, a handle that can rotate around a fixed axis is installed on the casing, a gear is installed at the lower end of the handle and is located in the casing, and a crank arm and a matching arm are installed on the output shaft of the driving motor. The driving gear, the driving gear meshes with the gear, and there is a gap between the crank arm and the supporting device of the driving gear; the electric operating mechanism of the miniature circuit breaker with this structure requires multiple state sampling and complex logic control circuits to realize normal operation. The opening and closing operation is costly, and when the handle is fixed at the closing position for a long time due to external interference, it cannot be opened when remote opening is required in an emergency

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