Rotor and molding die for rotor
AssigneeYazaki Corporation
InventorYusuke Aono
Life of this patent
Estimating the term…
Abstract
A rotor 1 can prevent from cracking a magnet when molding the rotor and a molding die for the rotor can prevent from reducing yield of rotors. The rotor 1 formed into disk shape includes a rotor body 12 and an annular shape magnet 13. The rotor body 12 has inner and outer cover portions 18, 19 for covering respectively inner and outer surfaces 13a, 13b of the magnet 13, and first and second end cover portions 20, 21 for covering respectively one end face 13c and the other end face 13d of the magnet 13. The rotor 1 is formed by injection molding with the molding die, whose a cavity receives the magnet 13.
Claims6
A rotor for rotating an output shaft of a motor comprising:
- a rotor body made of synthetic resin;
- and
- a magnet formed into annular shape and magnetized and fixed on said rotor body, the rotor body having an inner cover portion for covering an inner surface of the magnet and an outer cover portion for covering an outer surface of the magnet.
A molding die for molding a rotor, which is for rotating an output shaft of a motor having a rotor body made of synthetic resin, and a magnet formed into annular shape and magnetized and fixed on said rotor body, the rotor body having an inner cover portion for covering an inner surface of the magnet and an outer cover portion for an outer surface of the magnet, comprising:
- a first molding die having a first molding surface opposing with a space to the inner surface of the magnet;
- and
- a second molding die having a second molding surface opposing with a space to the outer surface of the magnet, the second molding die including a support projection projecting from the second molding surface for supporting the magnet by abutting on the outer surface of the magnet in a cavity being surrounded by the first molding surface and the second molding surface.
Dependencies are inferred from the claim text.