The embodiment of the invention provides a blade folding mechanism and a helicopter. The blade folding mechanism comprises a blade clamp and paddles, the blades are rotationally connected to the paddle clamp, and the paddles can move between a folding position and an unfolding position relative to a blade clamp; the blade folding mechanism further comprises a limiting assembly, the limiting assembly is configured to limit rotation of the blades relative to the blade clamp at the unfolding position, the limiting assembly comprises a limiting pin shaft, a pendulum bob, a limiting groove and an elastic piece, the limiting pin shaft penetrates through the blade clamp and the blades in a pluggable and rotatable mode, the pendulum bob is eccentrically connected to one end of the limiting pin shaft, and a groove structure is formed in the bottom of the pendulum bob. The limiting groove and the pendulum bob are distributed on the same side and formed in the blade clamp, the limiting groove is a U-shaped groove with a groove opening opposite to the pendulum bob, and the elastic piece is arranged on the blade clamp between the limiting pin shaft and the limiting groove in a protruding mode; when the paddle is in an unfolding position relative to the paddle clamp, the limiting pin shaft is arranged on the paddle clamp and the paddle in a penetrating mode, the end, away from the limiting pin shaft, of the pendulum bob is clamped in the limiting groove, and the elastic piece abuts against the interior of the groove structure of the pendulum bob.
本申请实施例提供一种桨叶折叠机构及直升机。该桨叶折叠机构包括桨夹和桨叶,桨叶转动连接在桨夹上,且桨叶可相对于桨夹在折叠位置和展开位置之间运动;还包括限位组件,限位组件配置为在展开位置限制桨叶相对于桨夹转动,限位组件包括限位销轴、摆锤、限位槽和弹性件,限位销轴以可插拔和可转动地方式穿设在桨夹和桨叶上,摆锤偏心连接于限位销轴的一端,摆锤的底部形成凹槽结构,限位槽与摆锤同侧分布地形成于桨夹上,限位槽为槽口与摆锤相对的U型槽,弹性件凸出设置在位于限位销轴和限位槽之间的桨夹上;当桨叶相对于桨夹处于展开位置时,限位销轴穿设在桨夹和桨叶上,摆锤的远离限位销轴的一端卡接于限位槽,弹性件抵顶于摆锤的凹槽结构内。
Blade folding mechanism and helicopter
桨叶折叠机构及直升机
2022-02-08
Patent
Electronic Resource
Chinese
IPC: | B64C AEROPLANES , Flugzeuge |