Spring-Pulley UAV Catapult

Abstract

The invention relates to the technical field of spring-pulley combined unmanned aerial vehicle ejectors. The spring-pulley combined unmanned aerial vehicle ejector is characterized by comprising a frame, a dragging rope, a fixed pulley, a secondary moveable pulley, a secondary moveable pulley frame, a primary moveable pulley, a primary moveable pulley frame, a parallel spring set, a rear force-loading frame, a rear support leg, a rear support plate, a front force-loading frame, a front support leg, a front support plate, a dragging hook, a releasing hook, a movable pulley set rope, a releasing handle, a releasing handle rotating shaft, an upper panel and a lower panel, wherein before an unmanned aerial vehicle is ejected, the dragging hook is locked on the releasing hook and the parallel spring set is used for storing elastic potential energy; when the unmanned aerial vehicle is ejected, the releasing handle is pressed for releasing the dragging hook and the parallel spring set is used for driving the dragging hook through the moveable pulley set, thereby enabling the dragging hook to move forward at a doubled speed of the parallel spring set; and the spring quantity, elastic factors and deformation quantity can be changed for acquiring the combination of different dragging forces and dragging speeds. In the spring-pulley combined unmanned aerial vehicle ejector, the matching of the spring set and the pulley set can be utilized for quickly and powerfully ejecting the unmanned aerial vehicle.

Description

technical field [0001] The invention is a catapult for ejecting a fixed-wing unmanned aerial vehicle, which can accelerate the unmanned aerial vehicle to the take-off speed within a short distance. It is mainly used in technical fields such as aerospace and drones. Background technique [0002] Fixed-wing UAVs (especially large-scale fixed-wing UAVs need a very long runway for taxiing and take-off. Usually, it is difficult to meet the conditions of a runway that is flat and of sufficient length. Therefore, fixed-wing UAVs usually use The catapult enables the UAV to quickly accelerate to the take-off speed in a short distance. In the past, the UAV catapult mostly used rubber bands as the ejection power, and its performance was greatly affected by temperature and humidity, and it was easy to age. In addition, Due to the limited elastic force of the rubber band, the rubber band catapult can only eject small and medium-sized fixed-wing UAVs (less than 40kg, and cannot effective...

AI Technical Summary

Problems solved by technology

In the past, most UAV catapults used rubber bands as the ejection power, and their performance was greatly affected by temperature and humidity, and they were prone to aging

In addition, due to the limited elastic force of the rubber band, the rubber band catapult can only eject small and medium-sized fixed-wing UAVs (less than 40kg, and for large fixed-wing UAVs, it cannot be effectively ejected due to insufficient power.

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