Anti-vibration suspension for helicopter main rotor comprises three sloping bars articulated on transmission box and structure by rigid lever supporting oscillating mass

摘要

The anti-vibration suspension comprises at least three sloping bars (8) each articulated (9,10) on the transmission box (2) and on the structure (1) by means of a rigid lever (11). The lever supports an oscillating mass (12) and is articulated on this structure. Each lever is connected to the structure by a torsion spring (14) stressed around a torsion axis perpendicular to the radial plane defined by the rotor (3) and corresponding sloping bar axes (ZZ,XX).