LAMINATED CORE FOR ELECTRIC MOTOR

摘要

This laminated core is equipped with: a steel plate laminate (1) that is constructed by layering annular steel plates having multiple through-holes (1a); tubular members (2) that are inserted through the through-holes (1a); and rivet pins (3) that are inserted through the tubular members (2), press the tubular members (2) against the through-holes (1a) by expanding the diameter of the tubular members, and bind the steel plates of the steel plate laminate (1) by the swaging sections (3b) at the tip of the rivet pins being swaged. Annular end plates (4) are provided on either end of the steel plate laminate (1), each annular end plate having stepped through-holes comprising a large-diameter section in the same size as the diameter of the through-hole (1a) and a small-diameter section in the same size as the outer diameter of the rivet pin (3) at the same positions as the multiple through-holes (1a) of the steel plate laminate (1). The tubular members (2) are locked to the step sections of the stepped through-holes at both ends, and the rivet pins (3) bind the steel plate laminate (1) and the end plates (4) together.