| 摘要 |
PROBLEM TO BE SOLVED: To improve a bearing part of a propeller fan, in which a driving shaft of a motor is installed. SOLUTION: A central part of a recessed part 29 formed in the top surface 22a of an upper wall 22 of the bearing part 27 of the propeller fan 20 is provided with a through hole 26 having a lock part 26a, through which the driving shaft 28a of the motor 28 is passed for lock. Projections 29a are provided with the predetermined space in the periphery of the through hole 26 of the recessed part 29, and an elastic member 30 formed with a through hole 30b for passing the projections 29a and a D-shape through hole 30a for passing the driving shaft 28a of the motor 28 is arranged. A washer 40 having the same structure is laminated on the top surface of the elastic member 30, and a nut 50 is screwed to a tip screw part 28e of the driving shaft 28 projecting upward from the washer to connect the propeller fan and the driving shaft of the motor to each other.
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