OPERATING METHOD OF ELECTRIC DRIVE WITH THREE-STAGE PLANETARY REDUCTION GEAR Russian patent published in 2013 - IPC F16H1/48 F16H57/08 

FIELD: machine building.

SUBSTANCE: operating method of three-stage planetary reduction gear consists in transfer of torque moment from electric motor (1) to outlet shaft (23) by means of three in-series installed planetary rows (6, 7, 8), the interaction between which in axial direction is performed through axial supports (20, 21) arranged between gear (10) and carrier (16) of medium-speed row (7), as well as at the end of gear (11) of low-speed row (8). Axial supports (20, 21) made in the form of balls are arranged in inserts (26, 27, 28); their simultaneous axial spring loading is performed by means of springs arranged in channels of gears of medium-speed and low-speed rows. Elastic force of springs is adjusted with screws (33, 35), one of which (33) is located in the channel of gear of medium-speed row (7) and directly contacts spring (31). The second screw (35) is located in the carrier of low-speed row on the side of outlet shaft (23), and has a groove on the side of contact with the axial support to interact with the support. Adjustment screws, inserts, axial supports and springs are located in the centre of rotation axes of reduction gear carriers.

EFFECT: invention allows improving accuracy and operating reliability of electric drive and reducing overall dimensions.

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