FLYWHEEL ROTOR OF FLYWHEEL MAGNET

摘要

PROBLEM TO BE SOLVED: To obtain a flywheel rotor of a flywheel magneto which can efficiently cool a power generating coil and prevent a spacer from rising from an inner face of the flywheel. SOLUTION: A rare earth magnet 7 is positioned on the inner face of a cylinder 3a of the flywheel 3 through the spacer 6 comprising a resin molded component, and prevented from coming off by fitting a magnet case 8. A ventilating opening 9 penetrating the spacer 6 is provided at the bottom 3a of the flywheel 3. A positioning protrusion 6f of the spacer 6 is fixed to and prevented from coming off a positioning hole 14 at the bottom 3b of the flywheel 3. In the spacer 6, a negative pressure generating protrusion is provided on the forward side in the rotating direction relative to the ventilating opening 9 of the flywheel 3.