High-voltage DC relay and assembly method thereof

Abstract

The invention discloses a high-voltage DC relay and an assembly method thereof. The high-voltage DC relay comprises two fixed contacts and a movable assembly, wherein the movable assembly comprises a movable spring part, a main spring and a push rod assembly, the push rod assembly comprises two independent parts of a push rod part and an U-shaped basket, the push rod part comprises a fixed piece and a push rod which are fixed together by insulation plastic, the two ends of the fixed piece are respectively fixed with the bottom of the side part of the U-shaped basket after the main spring, the movable spring part and the U-shaped basket are sequentially arranged at the top of the push rod part, so that the main spring is elastically tightened between the bottom surface of the movable spring part and the insulation plastic of the push rod part, and a movable spring piece props against the inner side of the top of the U-shaped basket. By dividing the push rod assembly into two independent parts, the high-voltage DC relay has the characteristics of simplicity in structure, convenience in forming and easiness in ensuring size accuracy; meanwhile, the two parts are easy to assemble, and automatic assembly of parts which are mutually matched is easily achieved; and moreover, the bonding resistant ability also can be enhanced.

Description

technical field [0001] The invention relates to a DC relay, in particular to a high-voltage DC relay and an assembly method thereof. Background technique [0002] The relay is an electronic control device, which has a control system (also known as the input circuit) and a controlled system (also known as the output circuit), usually used in automatic control circuits, it actually uses a smaller current to control a larger An "automatic switch" of electric current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. [0003] The DC relay is one of the relays. Most of the existing DC relays adopt the scheme of moving reed direct action (also known as solenoid direct action). The contact part of the DC relay includes two static contacts and a The moving assembly, the moving assembly includes the moving spring part and the push rod assembly. The moving spring part is composed of the moving reed and the moving contacts...

AI Technical Summary

Problems solved by technology

A kind of direct current relay of prior art, its push bar assembly is usually to adopt integral injection molding (as disclosed in patent publication number CN104412353A), this push bar assembly is that push bar and U-shaped basket are injection molded together, and push bar It is used to connect the moving iron core, and the U-shaped basket is used to adapt to the moving spring part. Since the push rod and the U-shaped basket are integrally injection molded, it is difficult to guarantee the accuracy of the push rod assembly, which makes injection molding difficult and inconvenient. Into the moving spring part, it is more difficult to realize automatic assembly

On the other hand, the existing high-voltage DC relays are likely to cause sticking or burning of the moving and static contacts due to the generation of arcs when a large current is connected.

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