Patent ID: 6407472
Filing Date: 2002-06-18
Classification: H02K,Y10T

Abstract:
A method for manufacturing a motor structure having a laminated structure of a plurality of plates and a stator pole assembly formed with a component mounting portion, comprising:preparing a plurality soft iron plates each having an annular yoke portion, and a plurality of stator pole portions which project radially outwardly from the yoke portion and stator pole teeth formed at an end portion of each stator pole portion; stacking the plurality of soft iron plates; setting the stacked soft iron plates into a mold; pressing both upper and lower surfaces of the stacked soft iron plates by protrusions which are formed in the mold; injection molding a synthetic resin into the mold to cover a portion of the stacked soft iron plates including an outer peripheral surface of the stator pole teeth, and binding the stacked soft iron plates to each other with the synthetic resin layer and integrally forming a circular groove and a projection formed integrally with the synthetic resin layer to hold and position components of the motor, the circular groove being located at a first end of the inside of the yoke portion, and receiving a motor hub component of the motor, and the projection being formed circularly and being located on a second end of the inside of the yoke portion, opposite the first end of the inside of the yoke portion, a center of the projection forming a hole to communicate the interior of the hole with the circular groove, and the projection fitting into a positioning hole in a substrate to position the pole assembly into the substrate ; and covering a portion of the stacked soft iron plates not covered with the synthetic resin layer with an insulting film.