The invention discloses a two-time power dividing
transmission system configuration which comprises a power input part and a
power output part. At the input stage, surface gears are adopted for dividing transmission, meanwhile, reversing and power dividing are achieved, one-stage transmission in a whole
transmission system is omitted, and the error generated by axial movement of the surface gearsnearly has no influence on
transmission performance. Cylindrical gears are adopted for dividing and parallel operation transmission, the
transmission ratio is large, and flexibility is good. Only a pair of gears on the cylindrical gears is adopted for power dividing, the structure is simple, the
design space is large, moreover, when dual gear shafts all adopt the elastic shaft structures, the length of the dual gear shafts is large, flexibility is good, and deformation coordination and uniform load achievement are more facilitated. Two-time power dividing transmission is adopted, and thus theload borne by the gears is reduced, so that the sizes of the gears are decreased, and the line speed of the gears is decreased. The
transmission system all adopts simple fixed-shaft gear trains for transmission, and thus achievement is easy in technology. The transmission configuration can be widely applied to the fields such as medium-heavy helicopter transmission systems and ship transmission systems.