| 摘要 |
PURPOSE: An automatic multilevel transmission is provided to control the size of a transmission to be compact by comprising mutually independent three multilevel transmission parts at two transmission shafts. CONSTITUTION: Multiple input side gears(30) rotate with an input shaft(20). Multiple output side gears(50) rotate with an output shaft(40). A first transmission shaft(60) and a second transmission shaft(80) are arranged around the input shaft in parallel. Multiple first transmission gears(100) are teeth engaged with the multiple input side gears for mutually rotating in opposite directions. Multiple second transmission gears(110) are teeth engaged with the multiple input side gears for rotating mutually in opposite directions. Multiple third transmission gears(120) are teeth engaged with the multiple output side gears for rotating mutually in opposite directions. A first transmission part(130) selectively controls the connection of the multiple first transmission gears and the multiple input side gears. A second transmission part(140) selectively controls the connection of the multiple second transmission gears and the multiple input side gears. A third transmission part(140) selectively controls the connection of the multiple third transmission gears and the multiple output side gears. A control part(160) selectively transmission controls the first transmission part or the second transmission part. The control part transmission controls the third transmission part.
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