| 摘要 |
PURPOSE:To provide a cooling device for forcedly air-cooled engine which is easy in assembly and simple in construction. CONSTITUTION:An external peripheral surface 23 of a flange 15a of a tapered boss 15 is formed on a slanted surface expanded outward a slanted surface engaged with the external peripheral surface of the flange 23 is provided on the internal surface of a cooling fan 17, and a recess 24 provided with a closely fitted part fitted closely to the head of a rivet 21 is formed. |
