An arc-interval structure of a contactor

Abstract

The invention discloses an arc isolation structure of a contactor. The arc isolation structure comprises a first shell which is used for installing auxiliary static contacts, a second shell which used for installing primary static contacts and multiple arc isolation plates. The opening of the first shell is downward. The second shell is accommodated in the first shell. The middle segment of the second shell is provided with a moving contact component. The second shell is provided with multiple chambers of which the openings face the moving contact component so as to providing matching of primary moving and static contact points in the chambers. The arc isolation plates are inserted in the corresponding chambers of the second shell from the openings of the chambers along a horizontal direction and form isolation of the side walls of the chambers. When the second shell is matched with the first shell, the second shell presses the arc isolation plates in a clamping way from above so that the arc isolation plates are enabled not to withdraw out of the chambers from the openings of the chambers along the horizontal direction. The arc isolation structure of the contactor has the characteristics of being simple in structure, low in cost and easy to assemble and especially reduces the assembling difficulty.

Description

technical field [0001] The invention relates to the technical field of contactors, in particular to an arc-breaking structure of a contactor. Background technique [0002] A contactor refers to an electrical appliance that uses a coil to flow current to generate a magnetic field in industrial electricity to close the contacts to control the load. [0003] The arc breaker is widely used in the contactor as the arc breaker element of the contactor. It can isolate the arc generated by the contactor contact during the breaking process, and further reduce the ablation of the arc to the plastic parts of the contactor. The arc breaker It must be positioned inside the contactor to prevent its displacement from deteriorating the electrical insulation between the moving contact and the static contact. [0004] Generally, the contacts of the contactor have a single-layer structure, and the installation of the arc baffle is relatively simple. Generally, the arc baffle is directly insta...

AI Technical Summary

Problems solved by technology

However, for the contactor with a double-layer design for the main contact and the auxiliary contact, the housing blocks the space where the arc breaker is installed from top to bottom, and the arc breaker cannot be assembled in the above-mentioned way. After the arc plate is installed in the shell, the pins of the arc breaker are bent by the riveting process and stuck on the body to achieve the limited assembly of the arc breaker. However, the insulation required by the assembly method formed by this structural feature The structure of the arc plate is complex, and there are many assembly processes, which consume a lot of labor costs

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