Coil part and manufacturing method therefor

Abstract

The invention discloses a coil part, which comprises a stator component, wherein the stator component comprises stator shells, electromagnetic polar plates and stator windings, and each stator winding is provided with three contact pins. The coil part also comprises contact pin protection elements, wherein a contact pin holes correspondingly matched with the stator component are arranged on each contact pin protection element, the contact pin on the stator component is inserted into the contact pin hole of the contact pin protection element and exposed out of the outer surface of the contact pin protection element, the contact pin protection element and the stator component are assembled together and then are subjected to injection molding to form a coil injection molding piece, an injection molding layer of the coil injection molding piece is coated with an insulated separation bars of the contact pin protection elements and is not coated on the end part of the contact pin, which stretches out of the contact pin protection element or the outer surface of the contact pin protection element, which is back to the stator component. Based on the coil part, the invention also provides a manufacturing method for the coil part.

Description

Technical field [0001] The invention relates to the technical field of air conditioners, in particular to a coil component of a stepping motor, such as an electronic expansion valve coil component and a manufacturing method thereof. Background technique [0002] In the prior art, the electronic expansion valve outputs the power that changes according to the system parameters, and maintains the opening of the valve at a required position to maintain the liquid supply required by the evaporator. The coil cover of the traditional electronic expansion valve is installed on the outside of the valve body, and the coil and the rotor in the valve body constitute a motor; during operation, the rotor drives the inner valve stem of the valve body to adjust the opening degree. [0003] In the prior art, the stator assembly of the coil component is placed in an injection mold through injection molding. Specifically, the pins are directly inserted into the injection mold for positioning, and the...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the stator assembly of the coil component is placed in the injection mold for injection molding. Specifically, the pins are directly inserted into the injection mold for positioning, and then injection molding is performed. In this way, on the one hand, due to the large number of pins, It will take a long time to load and unload when matching with the mold; in addition, during the injection molding process, part of the injection material will flow out from around the pin, which will affect the cooperation between the pin and other connecting parts; and it will be relatively difficult to take out the injection molded part after injection molding Some

In addition, if the pins are divided into upper and lower rows, since the size of the pins is relatively small and the distance between adjacent pins is also small, the pins should be inserted into the corresponding pin holes when the stator assembly is loaded into the injection mold , the work efficiency is low; in particular, since the pin part needs to be welded with the cable, the plane part of the injection molded part exposed by the pin is not allowed to have injection molding burrs, which requires that the matching pin holes on the mold should not have chamfers. The above requirements Makes it less efficient for the pins to fit into the pin holes of the mold

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