Stacked layered core and method for manufacturing the same

Abstract

A stacked layered core includes a core body formed from a plurality of core plates stacked in layers, each of the core plates having a connection base section formed in a circular shape and a plurality of salient pole sections radially extending from an external peripheral surface or an internal peripheral surface of the connection base. The circular connection base section has a fixing-side peripheral surface on the opposite side of the salient pole sections. At least one retaining recessed section is provided in the fixing-side peripheral surface of the connection base section. A dielectric film may be formed over an external surface of the core body. The retaining recessed section has a depth greater than a thickness of a bump portion of the dielectric film formed in the retaining recessed section such that the bump portion of the dielectric film is contained inside the retaining recessed section.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to a stacked layered core used in a variety of motors and a method for manufacturing the stacked layered core, and more particularly, to a stacked layered core having a stacked core body including a plurality of core plates stacked together and a dielectric film coated over an external surface of the stacked core body and a method for manufacturing the same.[0003] 2. Related Art[0004] Generally, a stacked layered core used in a variety of motors is formed from a plurality of thin plate-like core plates 1 shown in FIG. 8, for example, that are stacked together, as shown in FIG. 9. FIGS. 8 and 9 show a stacked layered core C for an outer rotor type motor, and core plates 1 that compose the stacked layered core C. The stacked layered core has a circular connection based section 1a provided at a central portion thereof and a plurality of salient pole sections 1b that are outwardly, radially extending in a radial direct...

AI Technical Summary

Problems solved by technology

Also, when the core retaining jig 2 is removed, each of the protruded sections 2b of the core retaining jig 2 may come in contact with various portions of the stacked layered core C, with the result that the dielectric film 4 may be cut or scratched, which is the major cause of poor paint quality.

Such portions would likely be rusted.

However, in this case, the sealing material may form bumps, which results in irregular internal diameters in the internal bore of the stacked layered core C.

Furthermore, although damages may be caused by protruded sections of a core retaining jig that is used to support the stacked layered core when the core retaining jig is removed, such damages are generated only inside the retaining recessed sections formed in the connection base section of the stacked layered core.

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