VACUUM MOTOR STRUCTURE

PROBLEM TO BE SOLVED: To enable the simplification of the structure and the enhancement of the reliability, by constituting a vacuum motor so that the inner end of a magnetic sensor body is positioned on the vacuum side and the outer end is positioned on the atmosphere side. SOLUTION: A rotor 1 is i...

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Bibliographic Details
Main Author SEKI SHIGEO
Format Patent
LanguageEnglish
Published 24.12.1999
Edition6
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:PROBLEM TO BE SOLVED: To enable the simplification of the structure and the enhancement of the reliability, by constituting a vacuum motor so that the inner end of a magnetic sensor body is positioned on the vacuum side and the outer end is positioned on the atmosphere side. SOLUTION: A rotor 1 is installed rotatably in a motor case 20 through a bearing 21, and a magnetic sensor body 11 is tightly fit and secured in a mounting hole 20a, formed in part of the motor case 20, through an O-ring 8. A rotor magnet 10 is placed on the circumference of the rotor 1, and a magnetic gear 12, made of magnetic material and functioning as a detector rotor, is placed on the circumference of an end 1a. The magnetic sensor body 11 is opposed to the gear 12a. The rotor 1, the magnetic gear 12 and the inner end 11Ba of the magnetic sensor body 11 are positioned on the vacuum side, and the stator 2 and the outer end 11Bc of the magnetic sensor body 11 are positioned on the atmosphere side. As a result, leakage from the vacuum side to the atmosphere side is eliminated, and wiring on the vacuum side is obviated. Therefore, the structure can be simplified, and the reliability can be enhanced.
Bibliography:Application Number: JP19980159358