Linked landing gear cabin door folding and unfolding device

A landing gear door, retractable device technology, applied in weight reduction, chassis and other directions, can solve problems affecting system reliability, complex control logic, large interior space, etc., to reduce occupied space, simplify control logic, The effect of improving reliability

Active Publication Date: 2014-12-03
JIANGXI HONGDU AVIATION IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The landing gear door retractable device includes two sets of actuating mechanisms: the actuating mechanism of the landing gear and the actuating mechanism of the wheel guard. There are many mechanisms, resulting in a large space and heavy weight in the machine

Method used

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  • Linked landing gear cabin door folding and unfolding device
  • Linked landing gear cabin door folding and unfolding device
  • Linked landing gear cabin door folding and unfolding device

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Embodiment Construction

[0021] The present invention is described in detail below in conjunction with accompanying drawing:

[0022] A landing gear door linkage retractable device, which includes landing gear 1, rotating shaft I2, rotating shaft II8, rotating shaft III11, rotating shaft IV15, upper strut 3, rocker arm I4, rocker arm II7, rocker arm III16, and lower strut 5 , Retractable actuator 6, connecting rod I9, connecting rod II14, connecting rod III17, goose-shaped rocker arm 10, pillar guard 12 and wheel guard 13;

[0023] The landing gear 1 is composed of a wheel and a pillar, fixed on the body through the rotating shaft II8, and rotates around the rotating shaft. A rocker arm II7 is designed on the landing gear pillar, which is connected with one end of the retractable actuator 6;

[0024] The upper strut 3 is connected with the machine body through the rotating shaft I2, and rotates around the rotating shaft. A rocker arm I4 is designed on the upper strut 3. One end of the rocker arm I4 is...

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Abstract

The invention relates to a linked landing gear cabin door folding and unfolding device and belongs to the technical field of aircraft manufacturing. The linked landing gear cabin door folding and unfolding device comprises a landing gear, a rotation shaft I, a rotation shaft II, a rotation shaft III, a rotation shaft IV, an upper supporting rod, a rocker arm I, a rocker arm II, a rocker arm III, a lower supporting rod, a folding and unfolding actuation cylinder, a connection rod I, a connection rod II, a connection rod III, a goose-shaped rocker arm, a support column protection plate and an airplane wheel protection plate. By virtue of the linked landing gear cabin door folding and unfolding device, the cabin door folding and unfolding actuation system is simplified, so that the occupying space of the device in an airplane is reduced and the structure weight is reduced; by virtue of the design of a linked mechanism, the order of folding and unfolding the landing gear, the airplane wheel protection plate and the support column protection plate is ensured, the control logic is simplified and the reliability is improved; the airplane protection plate is closed when the landing gear is unfolded, the pneumatic resistance can be reduced; the takeoff and landing performances of the airplane are improved; the damage to the airplane, caused by entrance of foreign materials in a landing gear cabin, can be avoided.

Description

technical field [0001] The invention relates to a landing gear cabin door linkage retractable device, which belongs to the technical field of aircraft manufacturing. Background technique [0002] In modern aircraft design, in order to ensure that the aircraft has good aerodynamic performance and avoid the aerodynamic resistance caused by the landing gear, it is generally necessary to design a set of motion mechanisms to realize the retraction and retraction of the landing gear. The traditional nose landing gear retractable device includes: a door retractable actuator, a landing gear retractable actuator, and a connecting rod. The wheel guard is retractable through the door retractable actuator; the pillar guard and the landing gear are retractable through the linkage of the landing gear; the landing gear is retractable through the landing gear retractable actuator. The landing gear door retractable device includes two sets of actuating mechanisms: the actuating mechanism of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C25/18B64C25/14
CPCY02T50/40
Inventor 何明清刘敏冷智辉沈亮辛荣提
Owner JIANGXI HONGDU AVIATION IND GRP
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