The present invention addresses the problem of providing a hollow structure, in particular, a propeller blade, which has excellent productivity, high strength, light weight and high quality, and which is a resin structure having a space therein and in which a skin part forming the outer surface and a holding part supporting the skin part from the inside are integrated. At least one of the holding parts is disposed in such a manner that, from a certain bonding point, a line segment having the smallest length connecting a bonding surface including the bonding point and an opposing bonding surface is set. In a cross-section (conveniently referred to as "cross-section 1") obtained by cutting the structure from a plane including a cross-section that passes through the midpoint of the line segment and is orthogonal to the line segment, a straight line (conveniently referred to as "straight line 1") connecting midpoints of short sides of a rectangle that circumscribes the cross-section and has a smallest area intersects the skin portion and the holding portion at three or more points.
本发明的课题在于提供生产率优异、高强度且轻量并且高品质的中空结构体、特别是螺旋桨叶片,形成外表面的表皮部和从内侧支承该表皮部的保持部被一体化、在内部具有空间的树脂制的结构体,上述保持部中的至少一者被配置为:从某接合点起设定将包含上述接合点的接合面与相对的接合面间连结的长度最小的线段,在由包含从上述线段的中点通过并与上述线段正交的剖面的面将该结构体切剖而得的剖面(方便起见称为“剖面1”)中,将外接于该剖面且面积成为最小的长方形的短边的中点连结的直线(方便起见称为“直线1”)在3点以上与表皮部及保持部相交。
Hollow structure and propeller blade
中空结构体及螺旋桨叶片
2024-06-04
Patent
Electronic Resource
Chinese