HELICOPTER ROTOR COLUMN Russian patent published in 2015 - IPC B64C27/32 

FIELD: transport.

SUBSTANCE: invention relates to production of helicopters. Rotor column comprises reduction gearbox with hollow output shaft fitted vertically and engaged with boss articulated with rotor blade spindles. Blade butts are rigidly secured to links and articulated with bars fitted in output shaft inner bores. Opposite ends of said bars are articulated with rockers with their mid part resting on output shaft while their opposite ends are coupled with swash plate rotor rods, said swash plate being fitted in armature bearings at slider spherical support to displace axially relative to output shaft owing to slider articulation with bell crank. Said bell cranks rests on link and is coupled with rotor pitch control bar. Butts of the blades are provided with grooves to interact with retainers fitted in vertical shafts arranged in bush bores and provided with bell cranks. One end of the latter is rigidly connected with rotary weight while opposite end is coupled via mid links with central disc hinges, said disc running about input shaft axis. Said cranks are resiliently coupled by spring with carriage.

EFFECT: higher reliability, decreased rotor vibrations.

2 cl, 6 dwg