PLANETARY DRIVE WITH ADJUSTABLE GEAR RATIO Russian patent published in 2009 - IPC F16H3/44 

FIELD: machine building.

SUBSTANCE: invention relates to gear drives with gear ratio adjusted depending upon the drive load and can be primarily used in automotive vehicles. The proposed planetary drive comprises inner central cylindrical gear wheel (3), cylindrical planet pinion (4) fitted on the inner pinion frame (6), outer central cylindrical inner gear wheel (5) and outer pinion frame (7). Two central bevel pinions (9, 10) are engaged with the outer central cylindrical gear wheel (5). Core satellite gear (8) is fitted on outer pinion frame (7) and in mesh with the central bevel gear wheels. One of the half-couplings (13) of the cam clutch is fitted on inner pinion frame (6) while the other one (14) is mounted on output shaft (12) to axially move thereon and is linked up with spring-loaded con rod (15) of control hydraulic cylinder (16) with its space communicating, via a pipeline, with that of braking cylinder (19). The said con rod accommodates braking roller (21) interacting with braking rim (22). Driven clutch half-coupling (24) is linked with outer pinion frame (7), while driving half-coupling (25) is jointed to movable half-coupling (14) of the cam clutch.

EFFECT: higher tractive power, smaller overall dimensions, automatic adjustment of gear ratio.

3 cl, 2 dwg