A motor relay capable of fast closing of contacts

Abstract

The invention discloses a motor relay capable of realizing contact quick closing. The motor relay comprises a driving mechanism, a push card, a moving spring component, a static spring component and a crank rocker mechanism. One end of the push card is matched with the moving spring component, and the other end is linked with the driving mechanism so as to drive the moving spring component to realize separating and closing of moving and static contacts through the push card when the driving mechanism operates. The crank rocker mechanism operates in a linkage way between the driving mechanism and the other end of the push card, and dead point position of the crank rocker mechanism is enabled to appear in the separating process of the moving and static contacts and the closing process of the moving and static contacts. The dead point position is arranged, and the idle stroke between the driving mechanism and the crank rocker mechanism is utilized so that the moving spring is enabled to get rid of the constraint of gear engaged transmission in the closing process to be quickly closed, the contacts are enabled to have sufficient dynamic pressure in closing by relying on the counter force of the moving spring or increasing torsion force provided by a torsional spring, and thus the objectives of quick closing of the contacts and instantaneous pressurization can be achieved.

Description

technical field [0001] The invention relates to a motor relay, in particular to a motor relay capable of realizing fast closing of contacts. Background technique [0002] The motor relay is a new type of relay. Unlike the previous electromagnetic relay and magnetic latching relay, it does not use an electromagnetic coil to drive the relay contacts to close and open. It uses a micro stepping motor as the driving mechanism of the relay to Drives relay contacts closing and opening. [0003] A motor relay in the prior art is a relay that uses a motor to drive a gear reduction mechanism, and the final gear drives a push block to drive a movable reed to drive a dynamic and static contact to realize the function of opening and closing the contact. This kind of relay adopts a gear reduction mechanism, and the gear pushes the moving reed to go through the entire contact gap process at a nearly uniform speed. Under the action, the teeth of the crown gear and the front gear are re-en...

AI Technical Summary

Problems solved by technology

As we all know, if the contact closure time is too long, the jitter at the moment of contact closure will greatly reduce the electrical life and reliability of the contacts of high-power relays, especially under the action of short-circuit and large current, if it cannot be added at the moment of contact closure If the contact pressure is sufficient, then the arc generated by the instantaneous high current when the contact gap is small will burn the contacts, and even cause an explosion, which seriously endangers the safety of the motor relay.

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