Patent ID: 7892132
Filing Date: 2011-02-22
Classification: F16H

Abstract:
1. A transmission system for transmitting a driving force from a driving unit to a driven unit, comprising: the driving unit including a driving sun gear; a plurality of driving carrier shafts fixed to a case, a left driving carrier or a right driving carrier; a plurality of first driving planetary gears rotating about the driving carrier shafts and meshed with the driving sun gear; a plurality of second driving planetary gear shafts rotating about the driving carrier shafts by a desired angle; and a plurality of second driving planetary gears rotating around the second driving planetary gear shafts, meshed with the first driving planetary gears, and revolving around the first driving planetary gears by a desired angle; the driven unit including a driven sun gear; a plurality of driven carrier shafts fixed to the case, a left driven carrier or a right driven carrier; a plurality of first driven planetary gears rotating about the driven carrier shafts and meshed with the driven sun gear; a plurality of second driven planetary gear shafts rotating about the driven carrier shafts by a desired angle; and a plurality of second driven planetary gears rotating around the second driven planetary gear shafts, meshed with the first driven planetary gears, and revolving around the first driven planetary gears by a desired angle; and a transmission element with a tooth portion meshed with the second driving planetary gears and the second driven planetary gears for transmitting the driving force from the driving unit to the driven unit.