Compact load path swashplate assembly

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 27/605 (2006.01) B64C 27/32 (2006.01) B64C 27/50 (2006.01)

Patent

CA 2630876

A swash plate assembly includes a rotationally stationary swash plate and rotational swash plate which rotates relative to the rotationally stationary swash plate through a bearing system. Each servo control rod is attached to the swash plate assembly to communicate control inputs thereto through a respective servo lug. Each servo lug defines a servo pivot point off an in- line plane inboard of the bearing system. As the servo lugs extend below the rotationally stationary swash plate, a relatively uncomplicated attachment arrangement is facilitated which provides for redundant locking features at a highly inspectable location which simplifies maintenance and increased safety. By locating the servo pivot point just inboard of the bearing system, an exceeding compact load path is defined thereby. The load path is defined from the servo control, to the servo lug, through the rotationally stationary swash plate, bearing system, the rotational swash plate, the rotor pitch control point and into the pitch control rod.

La présente invention concerne un ensemble cyclique comprenant un plateau cyclique stationnaire en rotation et un plateau cyclique rotatif tournant par rapport au plateau cyclique stationnaire en rotation grâce à un système de palier. Chaque tige de servocommande est reliée à l~ensemble cyclique afin de communiquer à celui-ci les entrées de commande grâce à un servo-ergot respectif. Chaque servo-ergot définit un point de servo-pivotement depuis un plan en ligne à l~intérieur du système de palier. Lorsque les servo-ergots s~étendent en dessous du plateau cyclique stationnaire en rotation, un arrangement de liaisons relativement simple est facilité, lequel fournit des dispositifs de freinage en un endroit facile à inspecter, simplifiant ainsi la maintenance et permettant une sécurité accrue. En disposant le point de servo-pivotement à l~intérieur du système de palier, une voie de charge compacte excessive est ainsi définie. La voie de charge est définie de la façon suivante : de la servocommande au servo-ergot, via le plateau cyclique stationnaire en rotation, le système de palier, le plateau cyclique rotatif, le point de commande du pas de rotor et jusqu~à la tige de commande du pas.

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