Rotor manufacturing device

A rotor manufacturing device for inserting sheets and permanent magnets into slots extending along a rotational axis of a rotor core, each slot being an elongated hole and having a pair of internal faces opposing each other, the rotor manufacturing device comprising:

• a pair of sheet guides opposing each other, each of the sheet guides being disposed above a corresponding one of the pair of internal faces of the slot to feed the sheet into the slot, each of the sheet guides comprises an arm and a protection plate, and an upper face of the arm acts as a guide surface for feeding the sheet;
• a holder disposed between the pair of sheet guides, the holder comprising a magnet outlet through which the permanent magnet is fed into the slot from above;
• and
• a pair of retaining plates structured to pinch the permanent magnet in place against a weight of the permanent magnet is disposed at the magnet outlet;
• wherein the sheets and the permanent magnets are inserted with the rotor core positioned to vertically orient the rotational axis of the rotor core;
• the pair of sheet guides is linearly symmetrical in a front view in which a side of the pair of sheet guides is located at the front;
• an axis of symmetry of the pair of sheet guides and a center axis of the magnet outlet are aligned with each other in the front view;
• the retaining plates bend away from the axis of symmetry while the permanent magnet is inserted into the slot;
• the arm extends diagonally downward toward the axis of symmetry;
• and
• the protection plate is spaced from the upper face of the arm so as to create a gap therebetween.