ROTARY-WING VEHICLE ROTOR WITH BLADE FOLDING SYSTEM Russian patent published in 2009 - IPC B64C27/32 B64C27/39 

FIELD: aircraft engineering.

SUBSTANCE: proposed rotor comprises blades, rotor hub with lugs and blade-to-hub joints. Horizontal hinge axle has a hole and is additionally furnished with two axial elastomer bearings fitted in previously mentioned hole, symmetrically on both sides, and two covers jointing said bearings with axial hinge shaft lugs. Axial hinge shaft has two lugs to accommodate radial elastomer bearings of previously mentioned horizontal hinge, and blind hole housing radial fabric bearing and radial thrust elastomer, fitted deeper than the former. Every hub-to-blade joint incorporates folded blade flapping and pitch retainer that consists of flapping stop arranged between axial hinge shaft and hub upper parts, pitch retainer that locks axial hinge housing relative to axial hinge shaft, and handle jointed with flapping stop and pitch retainer.

EFFECT: simpler design, reduced loads and longer life.

2 cl, 3 dwg