Armature of rotating electric machine and method of manufacturing the same

Abstract

An armature of a rotating electric machine formed to provide excellent rotating balance. A plurality of auxiliary core materials (5) are laminated on both sides of a plurality of main core materials (4) by using the main and auxiliary core materials (4) and (5) formed of ring-shaped plate materials. These core materials (4) and (5) are formed integrally with each other by caulking their bosses with caulking parts (4h) and (5f) formed on the core materials so as to form a core (2). Ironing is applied to a shaft hole (2a) formed in the core (2) by using an ironing punch (7) before a complete-round motor shaft (1) is press-fitted thereinto.

Description

technical field [0001] The present invention belongs to the technical field of an armature constituting a rotating electric machine such as an electric device mounted on a vehicle and a method of manufacturing the same. Background technique [0002] In general, in this type of rotating electrical machine, the armature manufactured by fitting and supporting the shaft to the core of the wound coil has a structure in which a plurality of metal plates are punched out and manufactured. The formed ring-shaped plates are laminated through an integrated mechanism to constitute the core, and the shaft is pressed into the shaft hole formed in the core to fix the shaft in the core. In this case, it is necessary to fix the shaft in a state (integrated, fixed, fastened state) in which relative movement with respect to the core in the axial direction and in the axial circumferential direction is restricted. Therefore, a configuration has been proposed in which the outer diameter of the s...

AI Technical Summary

Problems solved by technology

[0006] On the other hand, since the core is formed by laminating a plurality of core pieces, lamination deviations occur anyway, and the deviations are also generated at the shaft hole, and the inner circumference of the shaft hole becomes stepped, or the diameter of the shaft hole becomes stepped. Axis accuracy is reduced

With such a structure, when the armature is formed by pressing a shaft without protrusions, since the lamination deviation directly affects the axis center accuracy of the shaft, there is a problem that the rotation balance is poor and surface runout occurs.

In addition, there is a possibility that the contact area between the shaft and the shaft hole cannot be sufficiently ensured. In this case, there is also a possibility that the fastening force between the core and the shaft is insufficient, causing problems. These are the problems that the present invention should solve.

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