Patent ID: 6489690
Filing Date: 2002-12-03
Classification: F02B

Abstract:
An engine generator unit comprising: an engine; an electric-power generator driven by said engine, said engine and said electric-power generator being provided coaxially in a direction of an output shaft of the engine, said electric-power generator being an outer-rotor/magnet type generator having a cantilevered outer rotor functioning also as a substitute for a fly wheel of the engine; a cooling fan device attached to said outer rotor; a fan cover covering said electric-power generator and said cooling fan device, said fan cover being generally in a cylindrical shape and made of die-case aluminum alloy, said fan cover having, at a first end thereof remote from said engine, a cooling-air inlet portion for introducing cooling air from outside said engine generator unit via said cooling fan device, a recoil starter being attached to the cooling-air inlet portion, said fan cover being directly attached at a second end thereof opposite the first end to said engine so that the fan cover serves as a heat radiating member for radiating heat produced by the engine and having, at the second end, a cooling-air outlet portion for blowing the cooling air onto an outer peripheral surface of said engine; and supporting leg members secured to said fan cover and said engine, said supporting leg members being mounted to a frame via shock-absorbing members; wherein the cooling fan device comprises a centrifugal cooling fan device that forces the cooling air between the outer rotor and the fan cover so as to send the cooling air to the outer peripheral surface of the engine through the cooling-air outlet portion.