MOTOR YOKE, MOTOR WITH REDUCTION GEAR, MANUFACTURING METHOD OF MOTOR YOKE, AND MANUFACTURING METHOD OF MOTOR CASING

摘要

PROBLEM TO BE SOLVED: To provide a motor yoke capable of contributing to making a motor to have high torque while decreasing weight.SOLUTION: In a motor yoke 100 having a magnetic circuit formation part 10a having a large influence and a magnetic circuit non-formation part 10b having a small influence when forming a magnetic circuit of a permanent magnet alternately in a circumferential direction corresponding to positions of permanent magnets 20 arranged in an inner circumference, a magnetic metal plate 110 is formed in a cylindrical shape by rounding a magnetic metal plate formed by alternately arranging thick parts 101 having thick plate thicknesses and thin parts 102 having thin plate thicknesses in a direction of the rounding, the magnetic circuit formation part is configured with the thick part, and the magnetic circuit non-formation part is configured with the thin part.