Patent ID: 9555881
Date: 2017-01-31
CPC Classifications: B64C,F16H,Y10T

Claim:
1. An apparatus for controlling a rotor of a rotary wing aircraft, comprising: a stationary frame; a rotary propulsion shaft extending through the stationary frame, the propulsion shaft having a first shaft portion and a second shaft portion coupled to the first shaft portion at a joint, the first shaft portion being configured to be coupled to a drive unit and the second shaft portion being pivotable relative to a centerline of the first shaft portion in two degrees of freedom about the joint; a bearing assembly mounted to the second shaft portion; a spherical bearing mounted to the stationary frame; at least one control arm coupling the spherical bearing to the bearing assembly; a stabilizing member that is common to each of the at least one control arm, the stabilizing member being configured to adjust a contact pressure of each control arm against one or more of the bearing assembly and spherical bearing while allowing pivoting of the second shaft portion; and at least one actuator coupled to the stationary frame at one end and connected to the second shaft portion at the other end so that the second shaft portion rotates relative to the at least one actuator, the at least one actuator being substantially parallel with the rotary propulsion shaft and configured to pivot the second shaft portion in the two degrees of freedom.