| 摘要 |
PURPOSE:To reduce a noise in a cooling fan, by fixing it to a rotor interposing a damping member. CONSTITUTION:A rotor 17 is fixed to the end of a crankshaft 11, while a stator coil 18 is fixed to a side surface of a crankcase. The rotor 17 fixes to its internal peripheral surface a resin made cooling fan 20 to be integrally tightened by a bolt 22 interposing a damping rubber 21 consisting of an O ring. In this way, a noise of the cooling fan can be reduced without causing its cooling function to be sacrificed. |
