Sealing structure of DC contactor

Abstract

The invention discloses a sealing structure of a DC structure. The sealing structure comprises a plastic shell and a base. A cavity is sealed and formed by the plastic shell and the base. A metal inner shell is sleeved in the cavity and is internally provided with two static contact points, a moving contact piece and a reciprocating driving mechanism formed by a coil and a moving iron core. The opening of the metal inner shell is provided with a ceramic piece in a sealing way. The two static contact points are fixed on the ceramic piece, and the upper ends of the two static contact points extend out of the ceramic piece respectively to form a connection end. Two leading out wires of the coil are led to the base from the ceramic piece respectively. According to the sealing structure, the ceramic piece and metal piece welded sealing is employed, the sealing effect is good, the environmental adaptation ability is stronger, the working temperature is improved to a range between 55 DEG C below zero to 85 DEG C from a range between 40 DEG C below zero to 85 DEG C, at the same time an upper step design is employed by the upper side face of the ceramic piece, the screen printed metallization can be completed in one time, the production efficiency is greatly raised, the lower step and connection ring welding are employed by the lower side face of the ceramic piece, and the insulation distance is increased.

Description

technical field [0001] The invention relates to a DC contactor, in particular to a sealing structure of the DC contactor. Background technique [0002] DC contactors are generally composed of arc extinguishing chambers, transmission parts, and coils. However, most of the arc extinguishing chambers of DC contactors on the market are sealed with epoxy resin. Not only the sealing effect is not good, but also the environmental adaptability is poor. Generally only at -40°C ~ +85°C. Contents of the invention [0003] In order to overcome the above defects, the present invention provides a DC contactor sealing structure, which not only has a good sealing effect, but also has stronger environmental adaptability. [0004] The technical solution adopted by the present invention to solve the technical problem is: a DC contactor sealing structure, including a plastic shell and a base, the plastic shell and the base are sealed to form a cavity, and a metal inner shell is sleeved in th...

AI Technical Summary

Problems solved by technology

[0002] DC contactors are generally composed of arc extinguishing chambers, transmission parts, and coils. However, most of the arc extinguishing chambers of DC contactors on the market are sealed with epoxy resin. Not only the sealing effect is not good, but also the environmental adaptability is poor. Generally only at -40℃~+85℃

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