CARRIER-FREE PLANETARY GEAR Russian patent published in 2014 - IPC F16H1/28 

FIELD: machine building.

SUBSTANCE: carrier-free planetary gear of ZK type comprises a movable crown gear (10), a driving solar gear (5), a fixed crown gear (11) and double-crown satellites (17), which are separated by a coaxial support ring (20) and are placed between end thrust discs (15, 16) with an outer diameter, equal to the initial circumference of geared crowns of these satellites. Thrust discs are tightened to each other by a threaded joint (19), made in the centre of thrust discs and tightly placed inside a hollow axis of geared crowns of satellites. External end surfaces of support discs are made in the form of thrust ball bearings (14) with circular rolling paths. Thrust ball bearings contact with their end covers (13). End covers are equipped with a circular stop with an inner diameter equal to the initial circumference of crown gears, installed on the stepped ledge of the crowns on the mobile and fixed crown gears. Thrust discs (15, 16) may roll without sliding by their external perimeter along the circular stop of the end covers (13).

EFFECT: provision of high transmission ratio with high loading capacity and efficiency.

4 cl, 1 dwg