To solve problems that an impeller is loosened or no adhesive is applied thereto after the impeller is fitted during assembly, and to simplify the assembly of the impeller including a water draining plate.
In a drainage pump for an air conditioner with an impeller 12 for drainage is fixed to an output shaft 4 driven by a motor 1, a turn-stopper 11 and a loosening-stopper 10 are provided on the output shaft 4, and an impeller shaft 13 of the impeller 12 is formed in a snap-fit structure so as to be engaged with the turn-stopper 11 and the loosening-stopper 10. As a result, the loosening-stopper 10 and the turn-stopper 11 are respectively engaged with and fixed to the impeller shaft 13 having the snap-fit structure only by inserting the output shaft 4 in the impeller shaft part 13 of the impeller 12, the assembly of the impeller 12 in the rotary shaft 4 is simplified, the problems that the impeller 12 is loosened, or no adhesive is applied can be solved. In addition, the impeller 12 can be easily disengaged from the output shaft 4, and the maintainability can be improved.
| WO/2018/078239 | IMPELLER FOR CENTRIFUGAL PUMP, CENTRIFUGAL PUMP AND MANUFACTURING METHOD |
| JP2022539564 | Pump shaft for multi-stage pump |
| WO/2020/027952 | DOWNHOLE CENTRIFUGAL PUMP HAVING NON-CIRCULAR SHAFT |
KOMATA MICHIO
NAKAJO TAKASHI
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