Blocking type electric engine iron core and manufacturing method thereof

Abstract

A separated iron core comprises a plurality of sector-shaped tooth block groups spliced with each other, wherein windings can be wound on the sector-shaped tooth block; and each sector-shaped tooth block group consists of a plurality of sector-shaped punching sheets stacked on each other. The iron core is characterized in that each sector-shaped punching sheet is a single-tooth sheet including a tooth crown, a tooth body and a yoke portion with an engagement section; each sector-shaped punching sheet further comprises a dovetail protrusion portion with a narrow upper portion and a wide lower portion extending on the bottom of the tooth body; and a dovetail groove section with wide bottom and narrow opening can be formed between the protrusion portions of two sector-shaped punching sheets correspondingly engaged with each other. The invention can improve the material utilization rate by stamping individually and stacking together; the dovetail protrusion portion is designed on the bottom of the tooth body of single sector-shaped punching sheet and the dovetail groove is formed between two engaged sector-shaped punching sheets; and the sector-shaped tooth block can be clamped on a positioning stand with matched tooth socket structure through the groove structure without fixing of bolts and via-holes, thus achieving simple structure, convenient assembly and high positioning accuracy.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and in particular relates to a motor iron core that can be assembled in blocks and a manufacturing method thereof. The motor iron core can be used not only as an inner stator core of a motor but also as a rotor of a generator iron core. Background technique [0002] At present, the iron core of the motor is usually processed by stamping lamination method or winding method. Among them, the winding method is only suitable for processing narrow ring cores with large curvature radius and relatively shallow slots, and is mainly suitable for inner open slots, such as automobile generator cores, but for cores with small radius and outer open slots Ordinary winding processing methods cannot be realized. Therefore, the general iron core adopts the method of stamping and lamination. The basic steps are: first, according to the cross-sectional shape of the iron core, punch the silicon steel sh...

AI Technical Summary

Problems solved by technology

However, in said patent, when multiple sets of gear blocks are spliced ​​into an annular stator body, it is necessary to adopt fasteners (such as bolts, screws, etc. ) can be fixedly connected into one body, the assembly is more troublesome, and the process precision is not high; secondly, due to too many accessories, the processing is very complicated, which increases the production cost to a certain extent

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