| 摘要 |
A step down gear train, more specifically for an adjusting device of a motor vehicle seat, comprising an output shaft ( 22 ) rotating about an output axis ( 34 ), a pinion ( 20 ) that is connected to the output shaft ( 22 ), a housing ( 24 ) that comprises a housing portion ( 26 ) which is located in immediate proximity to the pinion ( 20 ) and has a passageway ( 28 ) for the output shaft ( 22 ), a first fixed gear wheel having external teeth that is connected to the housing portion ( 26 ) and comprises a bearing hole ( 32 ) which is centered on the output axis ( 34 ), a second gear wheel having external teeth that is connected to the pinion ( 20 ) and comprises a bearing protrusion ( 38 ) which is adapted to mate with the bearing hole ( 32 ), a cam gear ( 39 ) having internal teeth that meshes with both the first and the second gear wheel ( 30, 36 ), that has a gear axis which is offset an eccentricity value e relative to the output axis ( 34 ), that has a bearing hole ( 44 ) which is adapted to mate with the output shaft ( 22 ) and has the same axis as the output shaft ( 22 ) and an input shaft ( 52 ) that is in direct or indirect rotating communication with the cam gear ( 39 ).
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