Slide-wheel composite type small and medium sized UAV landing gear system

Abstract

The invention relates to a slide-wheel composite type small and medium sized UAV (unmanned aerial vehicle) landing gear system. The system is characterized in that: each taxiing vehicle wheel assembly located on slide plates is equipped with a base for installing vehicle wheels, a clamping slot is arranged above the base, a clamp hole for placing a compression spring is disposed at the center of the clamping slot, a threaded hole is coaxially disposed at the clamping hole center, and slideway holes are arranged on landing gear supporting arms and the slide plates coaxially toward the direction of the threaded hole. The landing gear system also includes a pair of automatic release control assemblies able to control timely separation of each taxiing vehicle wheel assembly. Each automatic release control assembly comprises: a sliding pin equipped with a small hole at the upper end, a fastening rope able to pass through the small hole at the upper end of the sliding pin so as to prevent the sliding pin from slipping off from the slideway holes, and a cutter that passes through and is in connection with the fastening rope and can cut off the fastening rope. The cutter cut off the fastening rope timely under the control instruction of a control circuit board so as to complete automatic separation release actions of the taxiing vehicle wheel assembles, thus realizing the functions of rapid taxiing takeoff and short-range braking landing.

Description

technical field [0001] The invention relates to a landing gear design technology for small and medium-sized unmanned aerial vehicles, in particular to a skid-wheel composite small and medium-sized unmanned aerial vehicle landing gear system (or called: small and medium-sized unmanned aerial vehicle skid-wheel hybrid landing gear system). Background technique [0002] The performance of UAV landing gear is the most critical indicator of UAV flight site adaptability. From the first airplane invented by the Wright Brothers to today's jumbo jet airliner, the landing gear system of the airplane has gone through two important stages. Two main wheels at the front), its advantage is that it has low requirements on the runway, and its disadvantage is poor directional control. The rear three-point landing gear system is more suitable for early slow aircraft; the second stage is the modern front three-point landing gear The system (consisting of one front wheel at the front of the air...

AI Technical Summary

Problems solved by technology

From the first airplane invented by the Wright Brothers to today's jumbo jet airliner, the landing gear system of the airplane has gone through two important stages. Two main wheels at the front), its advantage is that it has low requirements on the runway, and its disadvantage is poor directional control. The rear three-point landing gear system is more suitable for early slow aircraft; the second stage is the modern front three-point landing gear The system (consisting of one front wheel at the front of the aircraft and two main wheels at the middle and rear) has the advantage of better directional control, and the disadvantage of higher requirements for the runway, suitable for modern high-speed aircraft

Due to the slow speed of small and medium-sized UAVs, they generally do not take off and land at special airports, and most of them use rear three-point landing gear systems. The main problems are: 1) When the UAV lands on a hard and smooth landing site such as asphalt and cement, the ground resistance of the rear three-point wheeled landing gear is small, the sliding distance is long, and the direction control accuracy is not high. In the operating environment, the length and width of the landing site are very limited, and the UAV often collides with obstacles after landing; 2) When the UAV lands on the grassland, potholes, soft soil and other landing sites, the friction of the front wheels There is a lot of resistance, and the speed of the plane drops rapidly when it lands, which makes the momentum of the plane unable to be buffered and reduced smoothly, which may cause the plane to overturn and be damaged

[0003] In order to overcome the above two problems, in 1972, my country began to use the skid-type landing gear for the air defense force to issue a modified type of target drone. After actual verification, the skid-type landing gear better solved the problems in the landing of drones. However, due to the high frictional resistance of the skid landing gear during the take-off phase, the need for a long taxiing distance makes it difficult to find the take-off site in actual field operations, and the aircraft's site adaptation is greatly limited

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