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CN-117533494-B - Airplane pressurizing cabin pressurizing prevention mechanism

CN117533494BCN 117533494 BCN117533494 BCN 117533494BCN-117533494-B

Abstract

The application belongs to the technical field of design of pressurizing prevention mechanisms of airplane pressurizing cabins, and particularly relates to a pressurizing prevention mechanism of an airplane pressurizing cabin, which is characterized in that a transmission roller is designed between the transmission roller and a slotted hole on a lug of a pressure relief door, after a cabin door is closed and a lock mechanism is locked, a certain matching margin is provided, the pressure relief door is opened by a certain angle through the elastic force of a first torsion spring and a second torsion spring, and the pressurizing prevention mechanism is gradually closed along with pressurizing of the pressurizing cabin, so that requirements on processing and assembling precision are met, interference caused by processing and assembling errors is avoided, the lock mechanism is ensured to be locked, the installation and the debugging are easy, and the manufacturability is good.

Inventors

  • GAN YADONG

Assignees

  • 中国航空工业集团公司西安飞机设计研究所

Dates

Publication Date
20260505
Application Date
20231116

Claims (5)

  1. 1. The pressurizing and preventing mechanism for the airplane pressurizing cabin is characterized by comprising a cabin door (1), a locking mechanism locking shaft (2), a connecting rod (3), an intermediate rocker arm (4), an intermediate pull rod (5), a transmission rocker arm (6), a transmission roller (7), a pressure release door (8), a first spacer bush (10), a first torsion spring (11), a first hanging pin (12), a second hanging pin (13), a second torsion spring (14), a second spacer bush (15) and a mandrel (16); The cabin door (1) is provided with a pressure relief opening; The lock shaft (2) of the lock mechanism is arranged on the inner side of the cabin door (1) and is provided with a rocker arm; The middle rocker arm (4) is hinged to the inner side of the cabin door (1); one end of the connecting rod (3) is hinged on a rocker arm of a lock shaft (2) of the lock mechanism, and the other end of the connecting rod is hinged on an intermediate rocker arm (4); the mandrel (16) is arranged on the inner side of the cabin door (1); the pressure release door (8) is arranged at the inner side of the cabin door (1) and sleeved at the periphery of the mandrel (16) through two lugs, wherein one lug is provided with a slotted hole; The first torsion spring (11) and the second torsion spring (14) are sleeved on the periphery of the mandrel (16), are positioned between two lugs on the pressure release door (8), and are connected to the pressure release door (8) at one end and the inner side of the pressure release door (8) at the other end; the transmission rocker arm (6) is sleeved on the mandrel (16); the transmission idler wheel (7) is arranged on the transmission rocker arm (6) and is clamped in the oblong hole; one end of the middle pull rod (5) is hinged on the middle rocker arm (4), and the other end is hinged on the transmission rocker arm (6); After the cabin door (1) is closed and the locking mechanism is locked, under the action of the elastic forces of the first torsion spring (11) and the second torsion spring (14), the pressure release door (8) has a rotation trend of opening inwards, so that one end part of a slotted hole on an ear piece of the pressure release door (8) contacts with the transmission roller (7), a certain angle is kept open, specifically, the pressure release door can be opened for 10-20 degrees, and the pressure release door (8) is gradually closed to seal a pressure release opening on the cabin door (1) along with the pressurization in the pressurizing cabin; When the lock mechanism is unlocked and the cabin door is opened, the lock shaft (2) of the lock mechanism rotates, the connecting rod (3) drives the middle rocker arm (4) to rotate, the middle pull rod (5) drives the transmission rocker arm (6) to rotate, the transmission roller (7) rolls to the end part of the other end of the oblong hole on the lug of the pressure relief door (8), the pressure relief door (8) is driven to rotate, the pressure relief door is opened inwards, and the blocking of the pressure relief opening on the cabin door (1) is relieved.
  2. 2. The aircraft cockpit boost prevention mechanism of claim 1 wherein, The middle pull rod (5) is a telescopic rod or is formed by connecting two sections of threads.
  3. 3. The aircraft cabin pressurization prevention mechanism according to claim 1, further comprising a sealing band (9); the sealing belt (9) is connected with the outer side edge of the pressure release door (8).
  4. 4. The aircraft cabin boost prevention mechanism of claim 1, further comprising a first hanger pin (12), a second hanger pin (13); The pressure release door (8) is provided with a supporting sheet which is positioned between the two lugs; The first hanging pin (12) and the second hanging pin (13) are connected to two sides of the supporting piece; The first torsion spring (11) and the second torsion spring (14) are positioned between two lugs on the pressure release door (8) and distributed on two sides of the supporting piece, one end of the first torsion spring is hooked on the first hanging pin (12) and the second hanging pin (13), and the other end of the second torsion spring is hooked on the inner side of the pressure release door (8).
  5. 5. The aircraft cabin boost prevention mechanism of claim 1, further comprising a first spacer (10), a second spacer (15); the first spacer bush (10) and the second spacer bush (15) are sleeved on the periphery of the mandrel (16); the first torsion spring (11) and the second torsion spring (14) are sleeved on the peripheries of the first spacer bush (10) and the second spacer bush (15).

Description

Airplane pressurizing cabin pressurizing prevention mechanism Technical Field The application belongs to the technical field of design of airplane cabin pressurization prevention mechanisms, and particularly relates to an airplane cabin pressurization prevention mechanism. Background According to the safety requirement, when pressurizing the aircraft pressurized cabin, the cabin door lock mechanism is required to be locked, therefore, a pressure relief opening is formed in the cabin, a corresponding pressurizing prevention mechanism is designed, the pressurizing prevention mechanism is connected with a lock shaft of the lock mechanism, after the cabin door is closed, the lock shaft of the lock mechanism is driven to seal the pressure relief opening after the lock mechanism is locked, the pressurizing prevention mechanism and the cabin door lock mechanism are designed to be linked, extremely high machining and assembly precision are required, in practice, machining and assembly errors which are difficult to avoid are caused, interference is easy to occur, the cabin door lock mechanism cannot finish locking, or after the cabin door lock mechanism is locked, the pressure relief hole cannot be sealed, the installation and debugging are difficult, the manufacturability is poor, and the yield is low. The present application has been made in view of the above-described technical drawbacks. It should be noted that the above disclosure of the background art is only for aiding in understanding the inventive concept and technical solution of the present application, which is not necessarily prior art to the present patent application, and should not be used for evaluating the novelty and creativity of the present application in the case where no clear evidence indicates that the above content has been disclosed at the filing date of the present application. Disclosure of Invention It is an object of the present application to provide an aircraft cockpit boost prevention mechanism that overcomes or alleviates at least one of the known technical drawbacks. The technical scheme of the application is as follows: The pressurizing and preventing mechanism for the aircraft pressurizing cabin comprises a cabin door, a locking mechanism locking shaft, a connecting rod, an intermediate rocker arm, an intermediate pull rod, a transmission rocker arm, a transmission roller, a pressure release door, a first spacer bush, a first torsion spring, a first hanging pin, a second torsion spring, a second spacer bush and a mandrel; the cabin door is provided with a pressure relief opening; the lock shaft of the lock mechanism is arranged on the inner side of the cabin door and is provided with a rocker arm; the middle rocker arm is hinged to the inner side of the cabin door; one end of the connecting rod is hinged on the rocker arm of the lock shaft of the lock mechanism, and the other end of the connecting rod is hinged on the middle rocker arm; the mandrel is arranged on the inner side of the cabin door; The pressure release door is arranged at the inner side of the cabin door and sleeved at the periphery of the mandrel through two lugs, and one lug is provided with a slotted hole; the first torsion spring and the second torsion spring are sleeved on the periphery of the mandrel and positioned between two lugs on the pressure release door, one end of the first torsion spring and the second torsion spring is connected to the pressure release door, and the other end of the first torsion spring and the second torsion spring are connected to the inner side of the pressure release door; The transmission rocker arm is sleeved on the mandrel; The transmission roller is arranged on the transmission rocker arm and is clamped in the oblong hole; One end of the middle pull rod is hinged on the middle rocker arm, the other end is hinged on the transmission rocker arm; After the cabin door is closed and the locking mechanism is locked, under the action of the elastic forces of the first torsion spring and the second torsion spring, the pressure relief door has a rotation trend of opening inwards, so that one end part of a long round hole on the lug of the pressure relief door contacts with the transmission roller, a certain angle is kept open, specifically, the pressure relief door can be opened for 10-20 degrees, and the pressure relief door is gradually closed to seal the pressure relief opening on the cabin door along with the pressurization in the pressurizing cabin; when the cabin door is opened, the lock mechanism lock shaft rotates, the connecting rod drives the middle rocker arm to rotate, and the middle pull rod drives the transmission rocker arm to rotate, so that the transmission roller rolls to the end part of the other end of the oblong hole on the lug of the pressure relief door, and further drives the pressure relief door to rotate, and the pressure relief door is opened inwards to release the blocking of the pressure relief opening o