The invention discloses a passive wing telescopic structure, and relates to the technical field of
aviation aircraft design. The problems that an existing unmanned aerial vehicle is large in
wingspan, large in occupied space, high in maintenance cost and large in probability of being detected and found are solved. The unmanned aerial vehicle comprises a wing, a telescopic wing, a linkage
rope, a traction mechanism and a resettable telescopic mechanism, a slot is formed in the middle of the front end face of the wing, the
tail end of the telescopic wing is inserted into the slot, the telescopic wing is connected with the wing through the resettable telescopic mechanism, one end of the linkage
rope is fixedly connected with the
tail end of the telescopic wing, the other end of the linkage
rope penetrates through the groove bottom of the inserting groove and then is connected with a control mechanism located on the
fuselage, and the linkage rope controls the telescopic wings to stretch out and draw back through a traction mechanism. According to the working principle of the movable
pulley, the compression spring is adopted as a driving part, the compression
stroke of the elastic part is shortened, the
machining difficulty of the elastic part is reduced, other power sources are not needed, the influence of high altitude and low temperature is avoided, and the
system can be applied to different unmanned aerial vehicles as an independent
system.