Electromagnetic relay with flexible coupling mechanism

Abstract

Provided is an electromagnetic relay with a flexible coupling mechanism. The electromagnetic relay with the flexible coupling mechanism comprises an ejector rod, an armature and the flexible coupling mechanism which is arranged between the ejector rod and the armature, wherein the flexible coupling mechanism comprises a lever and a lock catch, wherein the lever and the lock catch are installed in a shell body in a pivotal rotation mode, can rotate around a fixed shaft through springs to achieve hasp connection of locking / separation. The flexible coupling mechanism further comprises a push plate which is installed on a fixed plate in a movable mode, wherein a push plate spring and the lever are in elastic connection, and the lock catch and the push plate are in elastic linkage connection to enable the push plate to carry out linear reciprocating movement through the push plate spring and the lock catch. The armature is installed on the push plate through a connecting structure, the armature and the push plate are in mutual linkage, the ejector rod and the lever are connected, a spring provides releasing output force for the ejector rod, a lock catch spring provides driving force Q for the lock catch, the driving force Q acts on the push plate, is in the moving direction of the push plate, and is opposite to elastic force P in direction, the elastic force P of the push plate spring acts on the push plate and is in the moving direction of the push plate, and thus reliable attraction between the armature and magnetic yokes is achieved or the phenomenon that the ejector rod outputs damage impact force is avoided.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to the field of low-voltage circuit breakers, in particular to an electromagnetic relay suitable for residual current operated circuit breakers. Background technique [0002] In the field of low-voltage electrical appliances, the electromagnetic relay that uses a weak current signal as the excitation current is actually an electromagnetic actuation device in the trip control circuit. It is often used in residual current operated circuit breakers, circuit breakers with shunt tripping functions or electronic tripping in the circuit breaker of the device. For example, the electromagnetic relay (EMR), as an internal component of the electromagnetic residual current operated circuit breaker, is used to trigger the mechanical structure after receiving the weak current signal, and can convert the weak current signal into a mechanical action that controls the tripping of the...

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Problems solved by technology

[0004] In order to overcome the above-mentioned defects in the prior art, the object of the present invention is to provide an electromagnetic relay with a flexible coupling mechanism. The stable impact force becomes a flexible force that is not affected by the size of the external force. Through the flexible action of the push plate spring in the output repulsive force, not only the unstable rigid force output by the original ejector rod becomes stable, which is beneficial to the tripping action of the circuit breaker Stable flexible force, and the force that reacts on the push plate is also changed into a flexible force. Through the flexible action of the lever spring in the process of energy storage and release, the buffering of the output impact force of the ejector rod is realized, which can not only produce the required tripping force. Large operating force, and less damage to the tripping mechanism, thus solving the problem of wear, deformation and motion accuracy failure of the armature and related moving parts caused by the frequent and excessive impact force of the ejector rod, so that the armature and related moving parts are free from damage. It is damaged by impact, and at the same time, it also solves the problem that the armature and the yoke cannot be reliably engaged due to the deformation of the air gap between the armature and the yoke, which is beneficial to prolong the effective life of small electromagnetic relays and circuit breakers

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