Novel AC contactor

Abstract

The invention relates to a novel AC contactor. According to the following technical scheme, the novel AC contactor is characterized in that a magnetic conductive plate is formed by bending a metal plate; the magnetic conductive plate is in a frame shape on the whole; and the magnetic conductive plate comprise two horizontal edges and two vertical edges, wherein the two horizontal edges are an upper horizontal edge and a lower horizontal edge respectively, and the lower horizontal edge is provided with a threaded hole. A contact plate is in a hook shape on the whole; the contact plate is formed by bending a metal plate; and the contact plate comprises an upper horizontal plate, a lower horizontal plate and a vertical plate, wherein the upper horizontal plate, the lower horizontal plate and the vertical plate form a U-shaped cavity; and the lower horizontal plate comprises a connection portion and a wiring portion, the connection portion being provided with a through hole. On a bottom board, a bolt passes through the through hole and is screwed into the threaded hole, and thus fixation connection of the magnetic conductive plate, the contact plate and the bottom board is realized. Through the scheme above, the provided novel AC contactor is easier in part production, lower in cost and better in arc ignition effect.

Description

technical field [0001] The invention relates to an AC contactor. Background technique [0002] Existing AC contactors such as figure 1 As mentioned above, due to its unreasonable structural setting, there are some problems as follows: 1. There are holes on the lateral side of the magnetic guide plate, so that the screws can pass through the holes during assembly and be fastened to the bottom plate. The existence of the holes will reduce the magnetic conduction. The magnetic conduction effect of the plate reduces the blowing arc magnetic field in the arc striking space, thereby reducing the arc extinguishing effect; 2. There are also holes on the upper horizontal side of the contact plate so that the screws can pass through the holes during assembly, and Fastened to the bottom plate, the existence of the hole will make the arc move along the edge of the hole, and the moving distance will be lengthened, which is not conducive to the rapid entry of the arc into the arc extingu...

AI Technical Summary

Problems solved by technology

[0002] Existing AC contactors such as figure 1 As mentioned above, due to its unreasonable structural setting, there are some problems as follows: 1. There are holes on the lateral side of the magnetic guide plate, so that the screws can pass through the holes during assembly and be fastened to the bottom plate. The existence of the holes will reduce the magnetic conduction. The magnetic conduction effect of the plate reduces the blowing arc magnetic field in the arc striking space, thereby reducing the arc extinguishing effect; 2. There are also holes on the upper horizontal side of the contact plate so that the screws can pass through the holes during assembly, and Fastened to the bottom plate, the existence of the hole will make the arc move along the edge of the hole, and the moving distance will be lengthened, which is not conducive to the rapid entry of the arc into the arc extinguishing chamber; 3. The tail of the contact plate gradually widens, although it is more conducive to The arc moves, but it needs to consume a large amount of copper, resulting in high cost; 4. When the contact structure is assembled with screws, due to the short length of the screws, the hole on the upper horizontal side of the contact plate and the horizontal side of the magnetic conductive plate must be connected. After the holes are aligned, the screws are passed through the two holes from above, which requires high installation proficiency of the employees and makes the assembly efficiency low; 5. The bottom plate has multiple inserts. When the supplier processes the part, place it The insert can only rely on manual operation, which is labor-intensive and time-consuming, with low production efficiency and high cost; 6. The side of the armature is equipped with a splint, although the mechanical life of the product is improved, but in the case of the same thickness of the iron core, due to The magnetic permeability of the splint is not as good as that of the silicon steel sheet, resulting in a decrease in the suction force of the iron core, which affects the mechanical life of the product. The eddy current effect of the splint itself is high, which will generate a lot of heat and cause a high temperature rise of the coil.

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