CONNECTION BETWEEN PITCH CONTROL ROCKER AND BLADE ROTARY LEVER Russian patent published in 2023 - IPC B64C27/82 B64C11/06 B64C27/54 

FIELD: aviation.

SUBSTANCE: invention is related to designs of helicopter tail rotors. The detachable connection between the rocker (5) of the pitch control unit and the blade rotation lever (8) of the blade holder (7) in the head (3) of the tail rotor (1) of the rotorcraft contains a pin connecting the blade rotation lever (8) attached to the holder (7) the blades with the rocker (5) of the pitch control unit (4) and passing through the through hole (50) of the rocker of the control unit and the other end through the through hole (80) of the blade rotation lever. The pin is made in form of a sliding pin (9) passing between the blade rotation lever (8) and the rocker (5) of the pitch control unit, and passes along its entire length through a ball-shaped spherical bearing (6) with a central through hole (61). The ball (6) and the sliding pin (9) portion are surrounded by an outer cage (60) of the spherical bearing so that the sliding pin (9) can slide and rotate within the spherical bearing.

EFFECT: ensures reduced material wear and simpler maintenance of the tail rotor head and the rotorcraft as a whole.

13 cl, 8 dwg