A multifunctional hatch door vent device using cam control

Abstract

The invention discloses a multifunctional cabin door ventilation opening device controlled through a cam. The device is provided with a cover plate arranged on a cabin door skin opening, wherein a rocking arm is arranged on the cover plate; a limiting component matched with the rocking arm is arranged at the front end of the rocking arm; the rear end of the rocking arm is fixedly connected to a rotating shaft component; the rotating shaft component is mounted on a supporting lug I and a supporting lug II; a rotating shaft is arranged at one edge on the periphery of the cabin door skin opening; a rocking arm lug I and a rocking arm lug II are respectively arranged at the two ends of the rotating arm component; one end of the rocking arm lug I and one end of the rocking arm lug II are respectively articulated with the two ends of the rotating shaft component; the other end of the rocking arm lug I and the other end of the rocking arm lug II are respectively articulated with the two ends of the rotating shaft; a driving pull rod is further arranged at the rear end of the rocking arm; one end of the driving pull rod is connected with the rear end part of the rocking arm; the other end of the driving pull rod extends to the driving part of the cam. The device realizes physical pressure relief in the condition that a cabin door is not completely closed, meanwhile realizes locking in the air during flight, and provides a low-cost and high-reliability solution for civil aircrafts.

Description

technical field [0001] The invention relates to the field of civil aircraft design, in particular to a cam-controlled multifunctional hatch vent device. Background technique [0002] In the history of civil aviation, there have been many accidents in the air caused by the door not being fully closed. On December 12, 2007, a Boeing 747-400 passenger plane of China Airlines flew from Taipei to Los Angeles, USA. Released, causing the passenger plane to release pressure. Fortunately, the captain turned back to the airport in an emergency and landed safely. On August 26, 2008, a Boeing 737 passenger plane crashed in Kyrgyzstan while carrying out the route from Bishkek to Tehran Mehrabad International Airport, killing 65 people. loss of pressure. [0003] Recently, various airworthiness authorities have consistently increased the requirements for door safety. It has been stipulated that when any hazard door is not fully closed, latched and locked, there must be a device to prev...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a cam-controlled multi-function door vent device, which uses mechanical means to realize physical pressure relief when the door is not completely closed, and at the same time realizes mid-air locking during flight, which is a new solution for civil aircraft. Provides a low-cost, high-reliability solution

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