ELECTRIC DRIVE WITH THREE-STAGE PLANETARY REDUCTION GEAR

摘要

FIELD: machine building.;SUBSTANCE: electric drive with three-stage planetary reduction gear includes electric motor (1), reduction gear with high-speed (6), medium-speed (7) and low-speed (8) planetary rows. High-speed carrier (15) is made as an integral part with medium-speed sun gear (10) and with support (22) on the side of electric motor. Medium-speed carrier (16) is made as an integral part with low-speed sun gear (11). Low-speed (outlet) shaft (23) is made as an integral part with low-speed carrier (17) and installed with a support on two radial ball bearings (24, 25). Axial supports (20, 21) between medium-speed sun gear (10) and medium-speed carrier (16) and between low-speed sun gear (11) and low-speed carrier (17) are spherical and equipped with their inserts (26, 27, 28) with hardness that is higher than hardness of carriers with possibility of being moved in direction of the axis coinciding with carrier rotation axis. Inserts are spring-loaded. Adjustment screws are provided for spring force adjustment.;EFFECT: invention allows improving accuracy and reliability of the device operation, as well as its weight and overall dimensions.;4 cl, 3 dwg