ELECTRIC DRIVE WITH THREE-STAGE PLANETARY REDUCTION GEAR Russian patent published in 2013 - IPC F16H1/48 

FIELD: machine building.

SUBSTANCE: electric drive with three-stage planetary reduction gear includes electric motor (1), reduction gear including inlet shaft (4), pre-step (5), high-speed (6), medium-speed (7) and low-speed (8) planetary rows. Each row includes sun gear (9, 10, 11), satellites (12, 13, 14), carrier (15, 16, 17) and crown (18, 19). High-speed carrier (15) is provided with support (23) on the side of electric motor and as an integral part with intermediate sun gear (10). Outlet shaft (20) is made as an integral part with low-speed carrier (17) and installed on two ball bearings (21, 22). Medium-speed carrier (16) is made as an integral part of axis (24) that is installed on the side of outlet shaft (20) in radial ball bearing (25) fixed in body of low-speed carrier (17). Axis (24) consists of two parts (26, 27) connected by means of an insert in the form at least of one bellows (28), and with internal support element (29) located along its axis. Medium-speed carrier (16) is provided with internal gear rim (36).

EFFECT: invention allows increasing efficiency and improving reliability of the device.

4 cl, 3 dwg