A landing gear retractable structure

Abstract

The invention discloses a landing gear retractable structure, which comprises a landing gear strut, and a retractable drive device for driving the landing gear strut to switch between a stowed position and a lowered position. The retractable drive device includes a box body and a The drive mechanism, the drive mechanism includes a drive member connected to the box, a transmission assembly connected to the drive member, the transmission assembly has a final transmission shaft, the box is connected to the final transmission shaft, and the final transmission shaft One end is fixedly connected with the fuselage. As a result, the retractable device integrated on the landing gear pillar drives the landing gear to rotate and retract, which not only reduces the number of rotary joints installed on the fuselage, but also has a simpler structure, smaller storage space, and fewer installation constraints. Simpler. It is especially suitable for retractable landing gear of small aircrafts.

Description

technical field [0001] The invention relates to the technical field of aircraft landing gear, in particular to a landing gear retractable structure. Background technique [0002] With the rapid development of small aircraft and drones, the demand for high-speed, light-weight small aircraft is increasing. Especially with the rise of all-electric aircraft, the demand for lightweight and space-saving installation of retractable landing gear has become increasingly prominent. [0003] At present, for the retractable landing gear of small aircraft and unmanned aerial vehicles, its retractable structure is usually as follows figure 1 As shown: one end of the retractable actuator 2 is hinged on the fuselage through the joint 16, the other end is connected with the landing gear strut 1, the landing gear strut 1 is hinged with the fuselage through the joint 4, and the retractable actuator 2 moves through telescopic movement. Driving the landing gear strut 1 to rotate around the joi...

AI Technical Summary

Problems solved by technology

Both the retractable landing gear strut and the retractable actuator need to be equipped with joints on the fuselage, and once the joint position is determined, it cannot be easily changed, otherwise it will affect the load bearing of the landing gear strut and the retractable actuator as well as the retraction of the landing gear. The upper and lower positions, resulting in rework of the design and thus affecting the project development cycle

This type of retractable actuator needs to bear part of the ground load during the landing and taxiing of the aircraft; when this structure is retracted, the arm of the actuator is generally smaller than the gravity arm of the landing gear, which is a laborious mechanism, so it is necessary to select Power units with greater output loads; these greatly limit the weight of the retractable actuator

At the same time, in order to realize the large-angle retraction of the landing gear, the only way to increase the stroke of the actuator and the installation distance is to increase the weight and increase the installation space of the landing gear.

Images