Assembly for providing flexure to blade system

Details Assembly for providing flexure to blade system Assembly for providing flexure to blade system

B - Operations, Transporting

64

C

B64C 27/473 (2006.01) B64C 27/46 (2006.01)

Patent

CA 2592644

An assembly for providing flexure to a blade of a rotary blade system includes an upper support plate having an upper curved surface, a lower support plate having a lower curved surface, and a yoke positioned therebetween. At least one of the upper and lower yoke surfaces has a layer of cushioning material positioned thereon and secured thereto. An alternate embodiment includes an assembly for providing flexure to a blade of a rotary blade system, including, an upper support plate having an upper curved surface, a lower support plate having a lower curved surface, and a yoke positioned therebetween and directly contacting the support plates wherein one of the curved surfaces is a non- circular arc that does not form part of the circumference of a circle. Another alternate embodiment includes a similar assembly having a twist-shank type of yoke for providing rotation of attached blades about their respective pitch axes.

L~invention concerne un ensemble destiné à fournir une souplesse à une lame d'un système de lame rotative comprenant une plaque support supérieure comportant une surface incurvée supérieure, une plaque support inférieure comportant une surface incurvée inférieure, et un mandrin positionné entre elles. Au moins une des surfaces de mandrin supérieure et inférieure possède une couche de matériaux de rembourrage placée au-dessus et y étant fixée. Un autre mode de réalisation comprend un ensemble destiné à fournir une souplesse à une lame d~un système de lame rotative, comprenant, une plaque support supérieure comportant une surface incurvée supérieure, une plaque support inférieure possédant une surface incurvée inférieure, et un mandrin positionné entre elles et directement en contact avec les plaques support, une des surfaces incurvées consistant en un arc non circulaire ne formant pas une portion de circonférence d'un cercle. Un autre mode de réalisation concerne un ensemble similaire possédant un mandrin de type tige tournante afin de fournir une rotation aux lames fixées autour de leurs axes de tangage respectifs.

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