WOBBLE PLATE OF HELICOPTER ROTOR Russian patent published in 1995 - IPC

FIELD: aeronautical engineering. SUBSTANCE: wobble plate of helicopter rotor has rotating ring 1, blade control rods 2, torque links 3 connecting rotating ring 1 with drive shaft running from reduction gear 6. Non-rotating ring 5 is hinged to rods of three hydraulic boosters 23, 24 and 25 of the control system. Bearing 4 is fitted in between rotating ring 1 and non-rotating ring 5. Frame 11 is connected with non-rotating ring 5 at two points by means of spherical bearings 9 and 10. Wobble plate is provided with lever 6 hinged to housing of reduction gear and frame 11 is connected with lever 16 at two points by means of spherical bearings 14 and 15. Axis passing through centers of spherical bearings 9 and 10 and axis passing through centers of spherical bearings 14 and 15 are mutually perpendicular. Axis of turn of lever 16 is parallel to axis passing through centers of spherical bearings 14 and 15 and axis of main-rotor shaft. EFFECT: simplification of construction, enhanced reliability and facilitated manufacture of wobble plate. 2 dwg