Quick wing surface unfolding mechanism of folding wing unmanned aerial vehicle

The invention provides a quick wing surface unfolding mechanism of a folding wing unmanned aerial vehicle, which comprises a base, a gas actuating cylinder, a rack and a gear, and a guide groove is formed in the base in the axial direction of an aircraft; the actuating cylinder is mounted on the base, and the output end of the actuating cylinder is fixedly connected with the rack to push the rack to move along the guide groove; rotating shaft seats are symmetrically arranged on the two sides of the rack, the gear is connected to the rotating shaft seats in a sleeving mode and axially limits a rotating shaft entering the gear through a pressing beam, an arc-shaped guide groove is formed in the bottom of the gear, and a pin hole is formed in the end of the guide groove; the gears are fixedly connected with the wing surfaces and meshed with the racks, and the racks move along the guide grooves under the thrust action of the actuator cylinder to push the wing surfaces on the two sides to be unfolded synchronously; and a spring pin is arranged on the rotating shaft seat, is ejected into the arc-shaped guide groove of the gear under the action of a spring, and extends into the pin hole of the gear to lock the gear after the wing surface is unfolded in place. The mass and the size of an existing folding mechanism can be reduced, the structure is simplified, cost is reduced, and operation is easy.