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    • 27. 发明专利
    • SMALL ELECTRIC MOTOR
    • JPH0568354A
    • 1993-03-19
    • JP23002791
    • 1991-09-10
    • HITACHI LTDHITACHI AUTOMOTIVE ENG
    • MIRUMACHI MITSUAKIFUKASAKU YOSHINORI
    • F16C33/74F16C33/10H02K5/167
    • PURPOSE:To prevent clogging due to an outflow of bearing oil between commutator bars and swelling deformation due to moisture absorption of bearing oil of a commutator mold material by press-fitting and constituting a bearing oil seal and a rubber-made seal member, provided with a bearing oil scatter preventing structure, onto a rotary shaft. CONSTITUTION:A rubber-made seal member 8 provided with a bearing oil scatter preventing structure is press-fitted and held on a rotary shaft 3. An oil entering side inlet diameter of the rubber-made seal member 8 is formed larger than the external diameter of a bearing supporting part of an end bracket 4 for supporting an oil-containing bearing 5. In the rubber-made seal member 8, an inner ring-shaped small protrusion of diameter smaller than the external diameter of a grooved part of the rotary shaft 3 is formed on a press-fit internal diameter side with the rotary shaft 3 to hold air-tightness at press-fit time. Further in the rubber-made seal member 8, a stepped part 11 is formed so as to provide an oil reservoir part. In the rotary shaft 3, an oil stopper and a groove for preventing the rubber-made seal member from coming off are formed. In this way, an outflow of bearing oil to the downstream is prevented, and clogging between commutator bars can be prevented.
    • 29. 发明专利
    • INNER AND OUTER AIR TAKE-IN DEVICE FOR AUTOMOBILE AIR CONDITIONER
    • JPH0241915A
    • 1990-02-13
    • JP19113988
    • 1988-07-30
    • HITACHI LTD
    • FUKASAKU YOSHINORIFURUYAMA BUNJI
    • B60H1/00
    • PURPOSE:To realize miniaturization and a high wind quantity, by arranging respectively an inner and outer air changeover mechanism on the upper wall surface of a scroll casing and a centrifugal fan motor at the bottom wall surface, and forming an auxiliary inner air take-in opening at a motor-fitting surface. CONSTITUTION:The drive motor 9 of a centrifugal fan 10 is provided at the bottom wall surface 7b of a scroll casing 7 and at the same time, an auxiliary inner air take-in opening 12 is formed at the bottom wall surface 7b. As a result, when inner and outer air changeover doors 5, 6 are in an inner air suction state, the auxiliary inner air take-in opening 12 is opened through the linkage of the 2nd door 13 provided on the motor-fitting side of the casing 7 and the take-in of an auxiliary wind (inner air) is done. Accordingly, making up for the lowering of the quantity of air can be realized, and also, an suction wind quantity allotment per one opening on an air take-in side against the quantity of discharge wind can be lowered, and the resistance of suction is decreased, and the efficiency of suction is improved. Thus, miniaturization and a high wind quantity are realized.