DAMPENING UNIT FOR MAIN ROTORS OF UNMANNED FLYING VEHICLES Russian patent published in 1998 - IPC

FIELD: aircraft manufacture; designing of dampening units for main rotors of unmanned flying vehicles. SUBSTANCE: dampening unit includes main rotor hub, torsion tubes and flexible beams; each torsion tube is connected with respective flexible beam its inner end with the aid of holder fitted with spherical bearing. Main rotor hub is connected with main rotor shaft and is provided with many outer radial panels having attachment units for securing the hub to inner ends of flexible beams and units for mounting the holders with their spherical bearings in hub. Assembly of each holder with its spherical bearing is located inside outer end of one of outer radial panels and inner end of respective flexible beam. According to invention, members for securing the outer radial panels of hub to inner ends of flexible beams are made in form of forks. Each unit for mounting the holder with spherical bearing on respective outer panel of main rotor hub includes near and far partitions and bearing bolt. Partitions bound bearing cavity and inner cavity of hub; bearing bolt is connected with each partition and spherical bearing for turn of holder in bearing cavity. EFFECT: optimization of construction and ease in maintenance. 3 cl, 32 dwg