MULTIPLE-ROW PLANETARY GEAR Russian patent published in 2011 - IPC F16H1/48 E21B4/00 

FIELD: machine building.

SUBSTANCE: multiple-row planetary gear consists of case (1) wherein there are installed central shaft (2) with common gear (3), carrier (4) with satellites (11) arranged in rows on it and central gear made complex and equipped with main rims (12). Friction rings (13) are positioned between the rims. Elements of the central gear are compressed in axial direction. Ends of intermediate friction rings (13) and ends of main rim (12) opposite to them have conic surfaces interacting with friction. Intermediate friction rings (13) are split and ensure friction interaction with their external cylinder surfaces with internal cylinder surface of case (1). Satellites (11) on carrier (4) are set in rows in orifices (or slots) made in the carrier. Optimal aperture angle δ of cone of interacting conic end surfaces of main rims and conic end surfaces of friction rings is δ=60-90°.

EFFECT: increased output capacity of gear.

5 cl, 4 dwg