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A plurality of mating tabs are provided on an opening for motor installation use disposed in an end plate of a casing. Along with this, a plurality of mating tabs and support tabs are provided on an outer peripheral end of a flange portion, and the flange portion is rotationally retained on the end

A plurality of mating tabs are provided on an opening for motor installation use disposed in an end plate of a casing. Along with this, a plurality of mating tabs and support tabs are provided on an outer peripheral end of a flange portion, and the flange portion is rotationally retained on the end plate through combination of these members. A protruding wall portion is disposed on a perimeter of an open portion for motor cooling-air use, and a guide rib of tapered configuration is provided adjacently to this wall portion. At the time of the foregoing rotational retaining, an end portion of a cooling-air passage of the flange portion is guided over this guide rib and mated with the protruding wall portion.

대표청구항 ▼

A blower comprising: a fan for blowing air; a motor for driving said fan; a casing for housing said fan and forming a passage for air blown by said fan, said casing having an air intake port on a surface at one axial end side of said fan, a first open portion for receiving said motor on a surface at

A blower comprising: a fan for blowing air; a motor for driving said fan; a casing for housing said fan and forming a passage for air blown by said fan, said casing having an air intake port on a surface at one axial end side of said fan, a first open portion for receiving said motor on a surface at another axial end side of said fan and being formed in a substantially circular configuration, and a second open portion for introducing cooling air to said motor on a surface at another axial end side of said fan so as to open at an outer peripheral position from said first open portion; a disc-shaped flange portion provided integrally on an outer periphery of said motor so as to extend in a radial direction of said motor, having a disc-shaped outer peripheral portion fixed on a perimeter portion of said first open portion for receiving said motor, said flange portion forming therein a cooling-air passage to pass cooling air for said motor; wherein between said perimeter portion of said first open portion for receiving said motor and said outer peripheral portion of said flange portion is provided a rotational type retaining structure which causes said casing and said flange portion to be connected by means of relative rotational movement in the circumferential direction of said casing and said flange portion and also causes said second open portion for cooling said motor and said cooling-air passage to be engaged wherein said casing includes: a taper-shaped guide rib formed on a surface at another axial end side of said fan at an immediately upstream side of said second open portion against a rotational direction of said flange portion a height of said guide rib increasing gradually to said second open portion, so that an end portion of said cooling-air passage of said flange portion is guided over said guide rib to be engaged with said second open portion.