Landing-gear raising-lowering device

Abstract

The invention discloses a landing-gear raising-lowering device. The raising-lowering device comprises a support used for being fixedly connected with a landing gear. A shaft hole is formed in the support. A wheel shaft used for being fixedly connected with an aircraft body is installed in the shaft hole. A sector gear is fixedly installed on the wheel shaft. A worm and gear mechanism driven by a driving mechanism is installed in the support. A worm gear tooth and a synchronous belt gear tooth are arranged on a worm gear shaft of the worm and gear mechanism. The synchronous belt gear tooth is engaged with a gear in a transmission mode through a synchronous belt to form a synchronous belt gear mechanism. The gear fixedly connected with the support is engaged with the sector gear in a transmission mode. The landing-gear raising-lowering device has the advantages that the structure and the functions are integrated, control is easy, working performance is stable and reliable, the manufacturing technology is simple, and maintenance is easy; the requirements for modern small aircraft landing-gear raising-lowering devices are met.

Description

technical field [0001] The invention relates to a landing gear retractable device, which belongs to an actuator device of an aircraft landing gear turning system, and is especially applicable to the electric retractable system structure of a small aircraft and an unmanned aerial vehicle. Background technique [0002] The landing gear retractable system mainly realizes the retractable and retractable landing gear, the upper and lower locking functions, and the ground sliding support landing gear function. The retraction and retraction of the landing gear of the traditional small aircraft mainly converts the high-pressure oil (gas) of the hydraulic and pneumatic energy systems into linear motion through the retractable actuator and the upper and lower position locks to realize the functions of retracting and extending the landing gear and locking the upper and lower positions. In order to realize the retractable locking function, complex hydraulic (gas) pressure source devices...

AI Technical Summary

Problems solved by technology

The traditional hydraulic (pneumatic) pressure retractable system accounts for a large proportion of the landing gear of small aircraft and UAV, and the structural space is relatively large, which greatly limits the performance and weight requirements of the landing gear.

[0004] Chinese patent CN200910041370.9 discloses a model aircraft electric retractable landing gear, although this kind of landing gear also adopts electric retractable form, but the structure principle is completely different from the present invention, and is not suitable for the present invention

[0006] 2) For small aircraft with a narrow fuselage, many landing gears are arranged in a splayed shape, and its structure takes up more space. In the process of stowing, the structure described above cannot move in a plane, resulting in a large space for sweeping in the cabin , making the undercarriage bay larger, will reduce the payload installation

[0009] 5) The above-mentioned patents are locked in the closed position due to figure 2 The above-mentioned 6 is a flexible device, which may vibrate up and down when the landing gear encounters shock, vibration and overload conditions, causing damage to the landing gear and other structures or devices in the landing gear compartment

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