Propeller folding mechanism for ejection type UVA

The invention relates to a propeller folding mechanism for an ejection type UVA. The propeller folding mechanism comprises paddles, a paddle hinge, a paddle hub, a shaft sleeve, a connecting rod, a thrust bearing and a clutch. A propeller is automatically opened through spring elastic force, meanwhile, connection of an engine and the propeller is cut off when the propeller is folded through the propeller clutch and a linkage device thereof, and after the propeller is opened, the propeller clutch is driven by the linkage device to be closed so as to be connected with a mechanism, for providingpushing force for the UVA, of the engine 本发明涉及一种弹射式无人机用的螺旋桨折叠机构,包括桨叶、桨叶铰链、桨榖、轴套、连杆、推力轴承、离合器，本发明利用弹簧弹力自动打开螺旋桨，同时利用螺旋桨离合器及其联动装置在螺旋桨折叠时断开发动机与螺旋桨的连接、在螺旋桨打开后通过联动装置带动螺旋桨离合器闭合从而连接发动机为无人机提供推力的机构。