| 摘要 |
PURPOSE:To prevent an unexpected accident such as the leakage or ignition of an internal liquid, by securing an entire rotary drive system in the nozzle of a tank main body in such a state that said drive system is perfectly blocked from the outside. CONSTITUTION:A driving speed reducer 9 and other parts are received in a hermetically closed case 7 in such a state that a shaft seal apparatus 8 is pierced through said case 7 and the main body of an electromotor 10 is fixed in the nozzle 3 of a tank by bolts so as to hold an attachment cover 11 between said main body and the nozzle in the outside. The output shaft of the speed reducer 9 is formed as a double cylinder structure and a worm gear 3 is engraved to the side of the outer cylinder shaft thereof through a solenoid type clutch 12 and a worm wheel 14 is always brought into engagement with said gear 13 in the hermetically closed case 7 by an orthogonal shaft. At the time of usual mixer operation, the solenoid clutch 12 is brought to a release state and only a stirring blade 13 is rotated without operating the worm gears 13, 14. At the time of oscillating operation, the solenoid clutch 12 is brought to a contact state and the worm gear 13 is rotated to rotate the worm wheel 14. |
