A civil aircraft cabin door emergency handle locking mechanism

Abstract

The present invention provides a locking mechanism for an emergency handle of a cabin door of a civil aircraft, and belongs to the field of cabin door mechanisms of civil aircraft. The present invention takes into account the movement logic relationship between the emergency handle and the external handle in various states, realizes posture control according to the movement trajectory of the mechanism, integrates and simplifies multiple functional parts, improves the transmission efficiency of the mechanism, and locks the roller through the groove cam arc slideway, thereby realizing the locking of the emergency handle. The mechanism is safe and reliable, has excellent anti-reverse drive performance, and can reliably lock the pre-positioning rod. The mechanism of the present invention is compact and has good applicability. It can be widely applied to various types of cabin doors and has good practical value.

Description

Technical Field

[0001] The invention belongs to the field of cabin door mechanisms of civil aircraft, and relates to an emergency handle locking mechanism for cabin doors of civil passenger aircraft. Background Art

[0002] The cabin door emergency handle mechanism of civil aircraft is a key component for controlling the escape slide bag, which is directly related to the life safety of all passengers. When the cabin door is closed, it must be ensured that the operator can freely switch the emergency handle between the armed and non-armed states; during the cabin door opening process and in the open state, if the emergency handle is in the armed state, it must be ensured that the emergency handle is reliably locked, so that the slide bag can be released smoothly, providing a safe evacuation channel for the majority of passengers. If the emergency handle is in the non-armed state, it must also be ensured that the emergency handle is reliably locked, so that the slide bag can move with the cabin door without accidental release; when closing the cabin door, the emergency handle can smoothly switch between the armed and non-armed states under the control of the operator, reliably meeting the state control requirements. Summary of the invention

[0003] In order to achieve the above object, the present invention provides a locking mechanism for an emergency handle of a cabin door of a civil passenger aircraft.

[0004] The technical solution of the present invention is:

[0005] A civil aircraft cabin door emergency handle locking mechanism, the emergency handle locking mechanism comprising an emergency handle assembly 2 and a slot cam assembly 3, the emergency handle assembly 2 and the slot cam assembly 3 are respectively hinged on a cabin door structure 1, the emergency handle assembly 2 is operated to achieve switching between a pre-positioned state and a non-pre-positioned state, and the slot cam assembly 3 is operated to achieve door opening and closing operations.

[0006] The emergency handle assembly 2 includes an emergency handle 4, an upper shaft 5, an upper rocker arm 6, a connecting rod 7, an upper roller 8, a lower roller 9, a lower rocker arm 10 and a lower shaft 11; the upper shaft 5 and the lower shaft 11 are respectively hinged to the door structure 1, wherein the upper shaft 5 and the lower shaft 11 are arranged parallel to each other; the emergency handle 4 and the upper rocker arm 6 are respectively fixed to the upper shaft 5, the lower rocker arm 10 is fixed to the lower shaft 11, the two ends of the connecting rod 7 are respectively hinged to the upper rocker arm 6 and the lower rocker arm 10, and the connecting rod 7 is arranged vertically to the upper shaft 5 and the lower shaft 11, the upper roller 8 and the lower roller 9 are respectively hinged to the connecting rod 7, and are located on the same side of the connecting rod 7, and at the same time, a proper distance is left between the upper roller 8 and the lower roller 9. When the emergency handle 4 is at the bottom, the emergency handle assembly 2 is in a pre-positioned state, and when the emergency handle 4 rotates to the top, the emergency handle assembly 2 is in a non-pre-positioned state. The emergency handle 4 drives the upper shaft 5 to rotate, thereby driving the upper rocker arm 6 fixed to the upper shaft 5 to rotate, the connecting rod 7 and the lower rocker arm 10 move with the upper rocker arm 6, and the upper roller 8 and the lower roller 9 hinged on the connecting rod 7 also move together.

[0007] The slot cam assembly 3 includes a slot cam 12, an intermediate shaft 13 and an outer handle 14. The intermediate shaft 13 is hinged to the door structure 1, and the intermediate shaft 13 is located between the upper shaft 5 and the lower shaft 11, and is parallel to the upper shaft 5 and the lower shaft 11. The slot cam 12 and the outer handle 14 are respectively fixed to the intermediate shaft 13. The outer handle 14 drives the slot cam 12 to rotate by the intermediate shaft 13, and is used to realize the opening and closing of the door. The slot cam 12 is located between the upper roller 8 and the lower roller 9, and is provided with upper and lower arc slideways. When and after the door is opened, the two arc slideways cooperate with the upper roller 8 or the lower roller 9 respectively to realize the locking of the emergency handle assembly 2. When the outer handle 14 is not opened, that is, when the door is closed, the upper roller 8 and the lower roller 9 in the emergency handle assembly 2 are not matched with the slot cam 12, and the emergency handle 4 can be smoothly switched between the pre-positioned and non-pre-positioned states under the control of the operator.

[0008] When the emergency handle assembly 2 is in the pre-positioned state, the outer handle 14 uses the intermediate shaft 13 to drive the groove cam 12 to rotate, the upper roller 8 is locked in the upper arc slide of the groove cam 12, and then the connecting rod 7 is locked, while the lower roller 9 is not locked in the lower arc slide of the groove cam 12, thereby realizing the locking of the emergency handle assembly 2 in the pre-positioned state.

[0009] When the emergency handle assembly 2 is in a non-pre-positioned state, the outer handle 14 uses the intermediate shaft 13 to drive the groove cam 12 to rotate, and the lower roller 9 is locked in the lower arc slide of the groove cam 12, and then the connecting rod 7 is locked, while the upper roller 8 is not locked in the upper arc slide of the groove cam 12, thereby realizing the locking of the emergency handle assembly 2 in the non-pre-positioned state.

[0010] Beneficial effects of the present invention:

[0011] 1) The logic control is simple and efficient. The present invention takes into account the movement logic relationship between the emergency handle and the external handle in various states, realizes posture control according to the movement trajectory of the mechanism, integrates and simplifies multiple functional parts, and improves the transmission efficiency of the mechanism.

[0012] 2) The locking mechanism is safe and reliable. The present invention locks the roller through the groove cam arc slideway, thereby realizing the locking of the emergency handle. The mechanism is safe and reliable, has excellent anti-reverse drive performance, and can reliably lock the pre-positioning rod.

[0013] 3) The structure is compact and easy to promote. The structure of the present invention is compact and has good applicability. It can be widely applied to various types of hatches and has good practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the installation location of the mechanism.

[0015] Figure 2(a) is the front view of the emergency handle assembly.

[0016] Figure 2 (b) is a schematic diagram of the emergency handle assembly.

[0017] Figure 3 (a) is the front view of the groove cam assembly.

[0018] Figure 3 (b) is a schematic diagram of the slot cam assembly.

[0019] Figure 4 (a) and Figure 4 (b) is a schematic diagram of the door opening process in the pre-positioned state.

[0020] Figure 4 (c) is the overall schematic diagram of the mechanism when the door is opened in the pre-positioned state.

[0021] Figure 5 (a) and Figure 5 (b) is a schematic diagram of the door opening process in the non-armed state.

[0022] Figure 5 (c) is the overall schematic diagram of the mechanism when the door is opened in the non-armed state.

[0023] In the figure: 1 door structure; 2 emergency handle assembly; 3 slot cam assembly; 4 emergency handle; 5 upper shaft; 6 upper rocker arm; 7 connecting rod; 8 upper roller; 9 lower roller; 10 lower rocker arm; 11 lower shaft; 12 slot cam; 13 intermediate shaft; 14 outer handle. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific embodiments.

[0025] Example:

[0026] like Figure 1 As shown, an emergency handle locking mechanism for a cabin door of a civil passenger aircraft is provided. The emergency handle locking mechanism is composed of an emergency handle assembly 2 and a slot cam assembly 3. The emergency handle assembly 2 and the slot cam assembly 3 are respectively hinged on a cabin door structure 1. The emergency handle assembly 2 is operated to switch between the pre-positioned state and the non-pre-positioned state. The slot cam assembly 3 is operated to open and close the door.

[0027] like Figure 2 (a) Figure 2As shown in (b), the emergency handle assembly 2 includes an emergency handle 4, an upper shaft 5, an upper rocker arm 6, a connecting rod 7, an upper roller 8, a lower roller 9, a lower rocker arm 10 and a lower shaft 11; the upper shaft 5 and the lower shaft 11 are hinged to the door structure 1, and the upper shaft 5 and the lower shaft 11 are parallel to each other; the emergency handle 4 and the upper rocker arm 6 are respectively fixed to the upper shaft 5, the lower rocker arm 10 is fixed to the lower shaft 11, the two ends of the connecting rod 7 are respectively hinged to the upper rocker arm 6 and the lower rocker arm 10, and the connecting rod 7 is arranged vertically to the upper shaft 5 and the lower shaft 11, the upper roller 8 and the lower roller 9 are respectively hinged to the connecting rod 7, and the upper roller 8 and the lower roller 9 are located on the same side of the connecting rod 7 with a distance between them.

[0028] When the emergency handle 4 is at the lower part, the emergency handle assembly 2 is in a pre-positioned state; when the emergency handle 4 is rotated to the upper part, the emergency handle assembly 2 is in a non-pre-positioned state; the emergency handle 4 drives the upper shaft 5 to rotate, thereby driving the upper rocker arm 6 fixed to the upper shaft 5 to rotate, and the connecting rod 7 and the lower rocker arm 10 move with the upper rocker arm 6, and the upper roller 8 and the lower roller 9 hinged on the connecting rod 7 also move together.

[0029] like Figure 3 (a) Figure 3 As shown in (b), the groove cam assembly 3 includes a groove cam 12, an intermediate shaft 13 and an outer handle 14. The intermediate shaft 13 is hinged to the door structure 1, and the intermediate shaft 13 is located between the upper shaft 5 and the lower shaft 11. The groove cam 12 and the outer handle 14 are respectively fixed to the intermediate shaft 13. The outer handle 14 drives the groove cam 12 to rotate by the intermediate shaft 13, and is used to realize the opening and closing of the door; the groove cam 12 is located between the upper roller 8 and the lower roller 9, and is provided with upper and lower arc slideways. When and after the door is opened, the two arc slideways cooperate with the upper roller 8 or the lower roller 9 respectively to realize the locking of the emergency handle assembly 2.

[0030] like Figure 4 (a) Figure 4 (b) and Figure 4 As shown in (c), when the emergency arming handle assembly 2 is in the arming state and the hatch is opened, the groove cam 12 rotates clockwise, and the upper circular arc slideway of the groove cam 12 cooperates with the upper roller 8 on the connecting rod 7. Since the movement trajectory of the upper roller 8 is perpendicular to the upper circular arc slideway of the groove cam 12, the anti-reverse drive characteristic of the cam is utilized to ensure that the connecting rod 7 is locked by the groove cam 12, thereby ensuring that the emergency handle assembly 2 is locked in the arming state.

[0031] like Figure 5 (a) Figure 5 (b) and Figure 5As shown in (c), when the emergency arming handle assembly 2 is in the non-arming state and the hatch is opened, the groove cam 12 rotates clockwise, and the lower arc slide of the groove cam 12 cooperates with the lower roller 9 on the connecting rod 7. Since the movement trajectory of the lower roller 9 is perpendicular to the lower arc slide of the groove cam 12, the anti-backward drive characteristic of the cam is utilized to ensure that the downward movement trajectory of the connecting rod 7 is locked by the groove cam 12, thereby ensuring that the emergency handle assembly 2 is locked in the non-arming state.

[0032] When the hatch is not opened, the upper roller 8 and the lower roller 9 in the emergency handle assembly 3 are not constrained by the upper and lower arc slides of the groove cam 12, and the connecting rod 7 can move under the drive of the emergency handle 4, that is, the emergency handle assembly 2 can be placed in the pre-positioned state and the non-pre-positioned state.

[0033] The above-described embodiments merely express the implementation methods of the present invention, but they cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A civil aircraft cabin door emergency handle locking mechanism, characterized in that: The emergency handle locking mechanism comprises an emergency handle assembly (2) and a slot cam assembly (3); the emergency handle assembly (2) and the slot cam assembly (3) are respectively hinged on the door structure (1); the emergency handle assembly (2) is operated to switch between the pre-positioned state and the non-pre-positioned state; and the slot cam assembly (3) is operated to open and close the door; The emergency handle assembly (2) comprises an emergency handle (4), an upper shaft (5), an upper rocker arm (6), a connecting rod (7), an upper roller (8), a lower roller (9), a lower rocker arm (10) and a lower shaft (11); the upper shaft (5) and the lower shaft (11) are respectively hinged to the door structure (1), wherein the upper shaft (5) and the lower shaft (11) are arranged parallel to each other; the emergency handle (4) and the upper rocker arm (6) are respectively fixed to the upper shaft (5), the lower rocker arm (10) is fixed to the lower shaft (11), the two ends of the connecting rod (7) are respectively hinged to the upper rocker arm (6) and the lower rocker arm (10), and the connecting rod (7) is vertically connected to the upper shaft (5) and the lower shaft (11). The emergency handle (4) is arranged in a straight line, and the upper roller (8) and the lower roller (9) are respectively hinged to the connecting rod (7) and are located on the same side of the connecting rod (7), and at the same time, an appropriate distance is left between the upper roller (8) and the lower roller (9); when the emergency handle (4) is at the lower part, the emergency handle assembly (2) is in a pre-positioned state, and when the emergency handle (4) is rotated to the upper part, the emergency handle assembly (2) is in a non-pre-positioned state; the emergency handle (4) drives the upper shaft (5) to rotate, thereby driving the upper rocker arm (6) fixed to the upper shaft (5) to rotate, and the connecting rod (7) and the lower rocker arm (10) move together with the upper rocker arm (6), and the upper roller (8) and the lower roller (9) hinged to the connecting rod (7) also move together; The slot cam assembly (3) comprises a slot cam (12), an intermediate shaft (13) and an outer handle (14); the intermediate shaft (13) is hinged to the door structure (1), and the intermediate shaft (13) is located between the upper shaft (5) and the lower shaft (11), and is parallel to the upper shaft (5) and the lower shaft (11); the slot cam (12) and the outer handle (14) are respectively fixed to the intermediate shaft (13); the outer handle (14) drives the slot cam (12) to rotate by means of the intermediate shaft (13), and is used to realize the opening and closing of the door; the slot cam (12) is located between the upper roller (8) and the lower roller (9), and is provided with two upper and lower arc slideways. When the hatch is opened and after it is opened, the two arc slideways cooperate with the upper roller (8) or the lower roller (9) respectively to achieve locking of the emergency handle assembly (2); when the outer handle (14) is not opened, that is, when the hatch is closed, the upper roller (8) and the lower roller (9) in the emergency handle assembly (2) are not cooperated with the groove cam (12), and the emergency handle (4) can be smoothly switched between the pre-positioned state and the non-pre-positioned state under the control of the operator; When the emergency handle assembly (2) is in a pre-positioned state, the outer handle (14) drives the groove cam (12) to rotate by means of the intermediate shaft (13), the upper roller (8) is locked in the upper arc slideway of the groove cam (12), and then the connecting rod (7) is locked, while the lower roller (9) is not locked in the lower arc slideway of the groove cam (12), thereby realizing the locking of the emergency handle assembly (2) in the pre-positioned state; When the emergency handle assembly (2) is in a non-pre-positioned state, the outer handle (14) drives the groove cam (12) to rotate using the intermediate shaft (13), and the lower roller (9) is locked in the lower arc slideway of the groove cam (12), thereby locking the connecting rod (7) and the upper roller (8) is not locked in the upper arc slideway of the groove cam (12), thereby achieving locking of the emergency handle assembly (2) in the non-pre-positioned state.

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