Laminated Iron Core

Abstract

Provided is a laminated iron core (10) that will improve the yield of materials, and prevent cracks or ruptures from being produced on iron core pieces, by easing the stress to be generated on coupling sections (13). Coupled divided-iron-core-pieces (14) to be used in assembling the laminated iron core (10) has, on the inner side in the radius direction of the coupling sections (13), V-shaped slots (17) with an opening angle of 360 / n, assuming the number of divided-iron-core-pieces (19) to be n, and which open towards the inner side in the radius direction; and also has, on the outer side in the radius direction of the coupling sections (13), separating sections (18) that separate mutually-adjacent, divided yoke-piece sections (12), which are located more on the outer side in the radius direction than the coupling sections (13). Furthermore, first through holes (20) having circular-arcs are formed on the end sections at the outer side in the radius direction of the V-shaped slots (17), which are in contact with the coupling sections (13); and second through holes (20), having arcs with a radius of curvature greater than the circular-arcs of the first through holes (20), are formed on the end sections at the inner side in the radius direction of the separating sections (18), which are in contact with the coupling sections (13).

Description

technical field [0001] The present invention relates to laminated cores generally called "bent cores" or laminated cores generally called "wound cores"; the laminated cores called "bent cores" are constructed such that That is, the connection split core pieces are connected by a bendable connection portion to the split yoke piece portions, and the split yoke piece portions are formed by dividing the yoke piece portions for each magnetic pole piece, and the connection split core pieces are stacked in predetermined pieces. After forming a linear laminated core by several numbers, it is bent at each connecting portion to form a ring shape; this laminated core called "wound core" is constructed in such a way that the connecting split core pieces can be bent. The connection part connects the divided yoke piece part which is formed by dividing the yoke piece part into one or a plurality of magnetic pole pieces, and the connected divided iron piece part is bent and wound at the conne...

AI Technical Summary

Problems solved by technology

[0002] In the above-mentioned laminated core (motor core) called "bent core", a connecting portion connecting adjacent divided laminated cores is formed In the outermost peripheral part of the iron core (specifically, the yoke part), but if the connection part is located at the outermost peripheral part of the yoke, the connection part bent when formed into a ring protrudes outward from the outer periphery of the core, Therefore, there is a problem that the holding force of the motor core decreases due to interference with the case, or the motor core itself deforms.

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