High-reliability unmanned aerial vehicle landing gear extension and retraction system

Abstract

The invention discloses a high-reliability unmanned aerial vehicle landing gear extension and retraction system, and belongs to the technical field of unmanned aerial vehicle design. The extension andretraction system includes a landing gear extension and retraction mechanism and a landing gear extension and retraction locking mechanism. The landing gear extension and retraction mechanism comprises a landing gear side plate and frame structure, a landing gear pillar and plane wheel assembly, a landing gear pillar extension and retraction rocker arm, a landing gear pillar extension and retraction actuating cylinder, a landing gear strut universal joint, an upper landing gear strut and a lower landing gear strut; and the landing gear extension and retraction locking mechanism comprises a landing gear down lock cylinder, a landing gear down lock triangle, a landing gear down lock bolt, a landing gear uplock shell, a landing gear uplock cylinder, a landing gear uplock bolt and a landing gear uplock hook. The landing gear extension and retraction system has the advantages of compact structure, reasonable force form, no driving force in a non-actuated state, and self-locking in a pressure-free extension state.

Description

technical field [0001] The invention belongs to the technical field of unmanned aerial vehicle design, and in particular relates to an unmanned aerial vehicle landing gear retractable system. Background technique [0002] Landing gear is an accessory device used by an aircraft to support the aircraft during takeoff, landing, or taxiing on the ground, and for ground movement. With the increase of aircraft speed, in order to reduce the air resistance when the aircraft is flying, the landing gear is designed to be retractable. When the aircraft is flying in the air, the landing gear is retracted inside the body, which can greatly reduce the wind resistance of the aircraft and improve the aerodynamic performance and flight performance of the aircraft. Compared with the fixed landing gear, although the retractable landing gear increases the weight of the aircraft and complicates the structural design of the aircraft, it improves the flight efficiency and is a common configuratio...

AI Technical Summary

Problems solved by technology

This type of landing gear retraction system, the electric type is usually only used for small aircraft due to the limited driving force; the high-pressure gas type uses the cylinder to generate the driving force, but it needs to keep the high-pressure gas connected to maintain the landing gear in the retracted position and the lowered position. State, when there is no air pressure, it cannot maintain the corresponding state

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