ELECTRIC DRIVE WITH THREE-STEP PLANETARY GEAR Russian patent published in 2013 - IPC F16H1/46 F16H57/23 F16H57/08 

FIELD: electricity.

SUBSTANCE: electric drive with a three-step planetary gear comprises an electric motor (1), a gear with a high-speed (6), interim (7) and low-speed (8) planetary rows. Each planetary gear comprises accordingly a sun gear (9, 10, 11), satellites (12, 13, 14), a carrier (15, 16, 17) and a crown (18, 19). The high-speed carrier (15) is arranged as a whole with an interim sun gear (10). The low-speed (output) shaft (20) is arranged as a whole with a low-speed carrier and is installed with a support on two radial ball bearings (21, 22). The interim carrier (16) is arranged with an inner geared rim and in a cantilever manner with the help of an axis is installed on two bearings (26, 27) installed in the body of the low-speed carrier (17). Stop rings (28, 29) serve to retain the interim carrier against axial displacement. Engagement of teeth of a low-speed sun gear (11) and inner teeth of a geared rim of an interim carrier (16) is arranged with radial and side gaps, not less than the product of the engagement module (m) by 0.4.

EFFECT: invention makes it possible to increase efficiency, to improve weight and dimension parameters of an electric drive.

2 cl, 2 dwg