ELECTRIC BLOWER AND VACUUM CLEANER WITH THE SAME

• Main Authors: HAMAZAKI MITSUMASA, TERAMOTO MASAYA, HAYATSU MAMORU
• Format: Patent
• Language: English; Japanese
• Published: 03.09.2020
• Subjects: BLASTING; COFFEE MILLS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DOMESTIC ARTICLES OR APPLIANCES; DOMESTIC WASHING OR CLEANING; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; FURNITURE; GENERATION; HEATING; HUMAN NECESSITIES; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SPICE MILLS; SUCTION CLEANERS IN GENERAL; WEAPONS

To provide a high-reliability electric blower that is suppressed from breaking when in operation.SOLUTION: An electric blower 1 comprises: a shaft 8 supported rotatably; a rotor core 9 which is fitted to an outer periphery of the shaft 8, and having a plurality of magnetic poles; a pair of bearings 12a and 12b fitted to the outer periphery of the shaft 8; an impeller 11 fitted to the shaft 8 and generating negative pressure by rotating; a stator core 16 driving the rotor core 9; a frame 5 holding the stator core 16; and a housing 5b formed on the impeller 11 side of the frame 5, and holding the pair of bearings 12a and 12b. The pair of bearings 12a and 12b are arranged between the rotor core 9 and the impeller 11, and Db>Ds>Dm holds for an outer diameter Dm of the rotor core 9, an outer diameter Db of the bearings 12a and 12b, and an inner diameter Ds of the stator core 16, an impeller 11-side end face of the bearing 12b and a flange part 5c of the impeller 11-side end part of the housing 5b abutting on each other in an axial direction.SELECTED DRAWING: Figure 2 【課題】運転時の破損を抑制した信頼性の高い電動送風機を提供する。【解決手段】電動送風機１は、回転可能に支持される軸８と、軸８の外周に取付けられ、複数の磁極を有するローターコア９と、軸８軸の外周に取付けられた一対の軸受１２ａ、１２ｂと、軸８に取付けられ、回転によって負圧を発生するインペラ１１と、ローターコア９を駆動するステーターコア１６と、ステーターコア１６を保持するフレーム５と、フレーム５のインペラ１１側に形成され、一対の軸受１２ａ、１２ｂを保持するハウジング５ｂとを備え、一対の軸受１２ａ、１２ｂはローターコア９とインペラ１１との間に配置され、ローターコア９の外径をＤｍ、軸受１２ａ、１２ｂの外径をＤｂ、ステーターコア１６の内径をＤｓとしたときに、Ｄｂ＞Ｄｓ＞Ｄｍの関係を有しており、軸受１２ｂのインペラ１１側端面とハウジング５ｂのインペラ１１側端部のフランジ部５ｃとが軸方向に当接する。【選択図】 図２