Patent ID: 9151162
Filing Date: 2015-10-06
Classification: B64C,F01D

Abstract:
1. A rotorcraft, comprising: a body; a power train coupled to the body and comprising a power source and a drive shaft coupled to the power source; a gearbox surrounding a portion of the drive shaft; a hub; a rotor blade coupled to the hub; an anti-rotation sleeve coupled to the gearbox and featuring an outer recess portion; a tilt sleeve positioned about the anti-rotation sleeve and having an opening therethrough, wherein the tilt sleeve is configured to slide in a strictly axial direction relative to the anti-rotation sleeve; a first swashplate ring positioned about the tilt sleeve and featuring an inner recess portion; an anti-rotation mechanism disposed through the opening and at least partially in the outer recess portion and the inner recess portion, the anti-rotation mechanism operable to prevent the first swashplate ring from rotating about the anti-rotation sleeve, the anti-rotation mechanism comprising: a second swashplate ring positioned about the first swashplate ring and rotatable about the anti-rotation sleeve with rotation of the plurality of rotor blades.