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A retractable device for door-ladder integrated hatch

A retractable device and cabin door technology, which is applied to aircraft doors and aircraft accessories, can solve the problems of hydraulic cylinder pressure attenuation, boarding door retractable mechanism damage, and high failure rate of complex systems, achieving stable performance and low cost. Inexpensive, easy to operate and simple effect

Active Publication Date: 2022-03-15
QINGAN GRP
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The hydraulic retractable device provides hydraulic energy through the hydraulic source of the aircraft to drive the actuating device to open and close the cabin door. When the hydraulically actuated aircraft is parked outside the field for a long time, the pressure of the hydraulic actuator will attenuate. In severe cases, the boarding door will completely free fall. Cause damage to the boarding door turning and retracting mechanism
[0004] The electric retractable device provides electric energy through the aircraft power supply to drive the actuating device to open and close the hatch, and the system is complex and has a high failure rate
[0005] The gas spring auxiliary retractable device assists the operator to open and close the hatch through the characteristics of the gas spring spring, which is greatly affected by temperature and has a short life

Method used

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  • A retractable device for door-ladder integrated hatch

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Embodiment Construction

[0016] When the door is opened, the rotation of the cabin door 1 drives the wire rope assembly 2 to stretch out in turn, the pulley assembly 3, the cable drum assembly 4, the gear pair 5, the planetary reducer 9, the bevel gear steering mechanism 10 and the handle assembly 11 rotate, and the torsion bar spring assembly 6 rotates. Applying resistance, the rotating arm 7 drives the buffer 8 to stretch out to apply damping.

[0017] When closing the door, after the handle assembly 11 meshes with the bevel gear steering mechanism 10, the operator reversely turns the handle assembly 11, which sequentially drives the bevel gear steering mechanism 10, the planetary reducer 9, the gear pair 5, the cable drum assembly 4, and the pulley assembly 3 to reverse Rotate to make the wire rope assembly 2 recover and close the hatch 1, and the torsion return of the torsion bar spring assembly 6 provides power assistance, and the rotating arm 7 drives the buffer 8 to retract.

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Abstract

The invention belongs to the field of aircraft structure design, and in particular relates to a retractable device for a door-ladder integrated cabin door. At present, the door-ladder integrated type cabin door structure is generally adopted on modern small passenger planes and helicopters. The existing door-ladder integrated type cabin door retractable device includes a hydraulic retractable device, an electric retractable device and a gas spring auxiliary retractable device. In order to adapt to modern aircraft design concepts, the retractable device of the door-ladder integrated hatch of the present invention adopts a wire rope assembly, and the cable drum assembly (4) of the wire rope assembly (2) is driven through a gear set and has a buffer structure. No need for on-board energy, low maintenance and operation costs, convenient and simple operation, stable performance, high reliability, no pollution, no noise, simple structure, long life, low cost, etc. It is the first choice of one-type hatch door retractable device, which has great economic application value.

Description

technical field [0001] The invention belongs to the field of aircraft structure design, and in particular relates to a retractable device for a door-ladder integrated cabin door. Background technique [0002] At present, the door-ladder integrated type cabin door structure is generally adopted on modern small passenger planes and helicopters. The existing door-ladder integrated type cabin door retractable device includes a hydraulic retractable device, an electric retractable device and a gas spring auxiliary retractable device. [0003] The hydraulic retractable device provides hydraulic energy through the aircraft hydraulic source to drive the actuating device to open and close the cabin door. When the hydraulically actuated aircraft is parked outside the field for a long time, the pressure of the hydraulic actuator will attenuate. In severe cases, the boarding door will completely free fall. Cause damage to the turning and retracting mechanism of the boarding door. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C1/14
CPCB64C1/1423
Inventor 杨飞刘冬平景晓莉刁龙
Owner QINGAN GRP
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