Self-locking device for alternating current contactor electromagnetic mechanism

Abstract

The invention discloses a self-locking device for an alternating current contactor electromagnetic mechanism. At an initial position, a locking piece is not at the position of a clamping groove and ispushed and limited by a limiting body at the top end of a main iron core, a lever presses a travel switch to keep the travel switch closed; when alternating current is introduced into a main coil, the main iron core pulls in, the limiting body extends upwards, the locking piece moves to the position of the clamping groove to be clamped into the clamping groove; a reset spring pulls the lever to rotate anticlockwise in a reverse direction, the travel switch is released, the main coil is de-electrified; due to the action of the locking piece and the clamping groove, the main iron core is lockedat a pull-in position, at this movement, an auxiliary coil is powered off, and an auxiliary iron core is in a free state and lifted along with the lever; a power supply in a coil working loop is powered off during releasing; the auxiliary coil receives an instruction signal and rapidly pulls in, and the auxiliary iron core is pulled downwards; the lever rotates clockwise in a forward direction, the locking piece is disengaged from the clamping groove, the main iron core is reset, and the lever presses the travel switch to make the travel switch closed; and the main coil is restored to the initial position. The self-locking device has the advantages of simple and compact structure, simple and reliable pull-in and releasing process, convenient operation and high stability, and can avoid current losses.

Description

technical field [0001] The invention relates to a self-locking device for an AC contactor electromagnetic mechanism. Background technique [0002] Electrical switches and other equipment used for power transmission and distribution, such as AC contactors, often use various electromagnetic mechanisms composed of coils, iron cores, and reset devices; Maintain the normal working state of the electromagnetic mechanism, such as AC contactor, electromagnetic control and protection switch, etc., when the electromagnetic mechanism is in the pull-in position during the working process, it needs to continuously supply power to the coil to maintain the pull-in state; the structure of the traditional electromagnetic mechanism is complex, Continuous energization consumes a lot of energy, the coil is easy to burn out when energized for a long time, and the reliability is poor, and the mechanism is prone to failure when encountering sudden interference; while the auxiliary interlock functi...

AI Technical Summary

Problems solved by technology

[0002] Electrical switches and other equipment used for power transmission and distribution, such as AC contactors, often use various electromagnetic mechanisms composed of coils, iron cores, and reset devices; Maintain the normal working state of the electromagnetic mechanism, such as AC contactor, electromagnetic control and protection switch, etc., when the electromagnetic mechanism is in the pull-in position during the working process, it needs to continuously supply power to the coil to maintain the pull-in state; the structure of the traditional electromagnetic mechanism is complex, Continuous energization consumes a lot of energy, the coil is easy to burn out when energized for a long time, and the reliability is poor, and the mechanism is prone to failure when encountering sudden interference; while the auxiliary interlock function provided by other mechanical structures is mostly complex in structure, inconvenient to operate, and reliable. Not easy to guarantee

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