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    • 6. 发明专利
    • REDUCTION GEAR
    • JP2000081098A
    • 2000-03-21
    • JP25163498
    • 1998-09-04
    • SEIBU ELECTRIC & MACHINERY CO
    • KUCHIHARA TAKESHITANI NAOKI
    • F16K31/53F16H1/32
    • PROBLEM TO BE SOLVED: To provide a highly reliable reduction gear with a high reduction ratio by obtaining a reduction ratio entirely by gear operations by way of making a gear rotated by an input shaft simultaneously mesh with two gears of different tooth numbers. SOLUTION: Rotation applied on an input shaft 6 allows a rolling gear 34 to rotate that is fitted on an eccentric shaft part 15 through a sliding bearing 17 and meshes with a fixed gear 30 fixed on a casing 7. The rolling gear 34 also meshes with an output gear 36 mounted on an output shaft 8. The number of teeth of the output gear 36 is slightly different from that of the fixed gear 30, and thus the rolling gear 34 rotates the output gear 36 at the reduction ratio based on the difference of the tooth numbers. A pointer gear 53 of same specifications with the output gear 36 also meshes with the rolling gear 34, and accordingly the turning amount of the output shaft 8 is indicated as the deflection of a pointer 55.