Lifting locking mechanism of civil aircraft cabin door locking handle shaft

Abstract

The invention relates to a lifting locking mechanism of a civil aircraft cabin door locking handle shaft. The handle shaft is supported by a bearing in a cabin door, the outer circumference of the handle shaft is coaxially and fixedly connected with a sleeve, lower locking teeth are arranged on the outer circumference of one end of the sleeve, and a lifting cam is arranged on the outer circumference of the other end of the sleeve and is in linkage with the lifting mechanism; a rotating shaft is supported on the cabin door, upper locking teeth are arranged on the outer circumference of the rotating shaft, the upper locking teeth and the lower locking teeth correspond in position, and an elastic resetting device is arranged on the circumference of the upper locking teeth; the rotating shaft extends out of the cabin door to be connected with a connecting rod, and the tail end of the connecting rod is connected with a roller; a limiting part is arranged on a door circumference structure, when the cabin door is closed, the roller is in surface contact with the limiting part, the roller moves along the inner surface of the limiting part in the cabin door lifting process, and the roller separates from the limiting part when the cabin door is completely lifted. The lifting locking mechanism realizes a lifting locking following function while the safety and reliability of the cabin door are considered.

Description

technical field [0001] The invention relates to a lifting and locking mechanism for a lock handle shaft of a cabin door of a civil aircraft, which belongs to the design of a cabin door of a civil aircraft. Background technique [0002] As an important part of the aircraft, the aircraft door is not only an important passage for passengers to board the aircraft under normal operating conditions, but also a passage for passengers to escape in case of an emergency. Based on this, the airworthiness clauses and regulations on the hatch have been revised several times, and the conditions have become more stringent. Because the lifting direction of the semi-blocked hatch is inward and upward, in the flight state, the pressurization force of the aircraft will help the hatch tend to close, so the safety is higher, and after it is fully opened, it is finally located outside the fuselage , which can save cabin space, many mature models (such as A320, A380, B787, etc.) and many new mode...

AI Technical Summary

Problems solved by technology

[0004] After being lifted, the door of the type that is flipped outwards will cause the lifting mechanism to move due to external force or gravity, which will easily cause the door to sink. In order to ensure the normal closing of the door, it is essential to lock the entire lifting mechanism at the end of the lifting position.

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