An inboard handle locking mechanism for an aircraft door

Abstract

The utility model relates to an inner handle locking mechanism of an aircraft door, and more particularly to a control mechanism of an inner handle of an aircraft door, which drives a rocker arm to rotate through a telescopic flight lock, drives a back-shaped lock hook to rotate, locks a shift fork connected to the inner handle through the back-shaped lock hook, and realizes the locking function of the back-shaped lock hook on the inner handle by fixing the shift fork and the inner handle on an inner handle shaft. A stopper is fixed on the lock hook shaft, a screw for adjustment is designed on the door structure, and a screw for adjustment is also designed at the front end of the shift fork, so that the utility model has good adjustment adaptability, the locking surface on the back-shaped lock hook tends to be locked under the action of the shift fork, and the telescopic flight lock reliably locks the inner handle. The utility model realizes reliable locking of the inner handle of the door, solves the adjustment problem of the existing inner handle mechanism of the door, avoids the risk of reverse driving of the mechanism, and provides a handle locking mechanism with compact space, simple structure, accurate adjustment, and low cost.

Description

Technical Field

[0001] This invention belongs to the field of civil aircraft cabin door mechanisms, and relates to an inner handle locking mechanism for an aircraft cabin door, and more particularly to a locking mechanism installed on the inner handle of a civil aircraft cabin door. Background Technology

[0002] The internal handle of an aircraft cabin door is a crucial device for opening the door, and the opening of the door has a significant impact on flight safety. If the door is accidentally opened during flight, it could potentially lead to catastrophic consequences. Therefore, a specialized internal handle locking mechanism is needed to ensure that the door is reliably locked during flight. Traditional internal handle locking mechanisms have two main problems: firstly, they require extremely high manufacturing precision, making mechanism adjustment difficult and resulting in high production costs, which is detrimental to installation and maintenance; secondly, the locking mechanism has low reliability, is sensitive to anti-flight loads, and it is difficult to ensure a good locking trend during assembly, thus causing destructive effects on the flight lock.

[0003] This invention uses a telescopic flight lock as the power source of the mechanism and utilizes the crank-slider principle to control the loop lock. The locking surface in the locked state has a unique locking tendency, ensuring reliable locking of the mechanism. The overall mechanism also has multiple adjustment measures such as adjustable connecting rods and limit screws, which facilitates the installation, debugging, and maintenance of the mechanism. It is highly efficient and convenient to operate, saving assembly and maintenance costs. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides an inner handle locking mechanism for aircraft cabin doors, effectively solving the issues described in the background art. This invention utilizes a telescopic flight lock to drive a rocker arm, which in turn rotates a loop-shaped locking hook. The loop-shaped locking hook locks a fork connected to the inner handle. Both the fork and the inner handle are fixed to the inner handle shaft, thus achieving the locking function of the loop-shaped locking hook on the inner handle. A stop is fixed to the hook shaft, and the cabin door structure is designed with adjustment screws. An adjustment screw is also designed at the front end of the fork, ensuring good adjustability. The locking surface on the loop-shaped locking hook tends to lock under the action of the fork, reliably guaranteeing the locking of the telescopic flight lock on the inner handle.

[0005] The present invention adopts the following technical solution:

[0006] An internal handle locking mechanism for an aircraft cabin door, comprising a telescopic flight lock 2, a first support 3, an adjustable linkage 5, a rocker arm 7, a locking hook shaft 8, a second support 9, a loop lock 12, a stop 13, a shift fork 14, an internal handle shaft 15, an internal handle 16, and a third support 19. Specifically:

[0007] The telescopic flight lock 2 is fixedly connected to the first support 3, which is fixedly connected to the door structure 1. One end of the adjustable link 5 is hinged to the telescopic flight lock 2 via the shaft 4, and the other end of the adjustable link 5 is hinged to the rocker arm 7 via the bolt 6. The rocker arm 7 is fixedly connected to the lock hook shaft 8. Two first screws 10 are respectively clamped to the second support 9 via double nuts 11. The second support 9 is fixedly connected to the door structure 1. The loop lock 12 and the stop 13 are respectively fixedly connected to the lock hook shaft 8, which is hinged to the door structure 1. The shift fork 14 and the inner handle 16 are respectively fixedly connected to the inner handle shaft 15, which is hinged to the door structure 1. The screw 20 is screwed to the shift fork 14, and the second nut 21 locks the screw 20 to the shift fork 14. The second screw 17 is clamped to the third support 19 via two first nuts 18, which is fixedly connected to the door structure 1.

[0008] The telescopic flight lock 2 drives the rocker arm 7 to rotate via the adjustable linkage 5, and the rocker arm 7 drives the lock hook shaft 8 to rotate.

[0009] When the telescopic flight lock 2 is locked, the stop surface 13a of the stop member 13 fixed to the lock hook shaft 8 contacts the first screw 10, which serves as a limit after locking. When the telescopic flight lock 2 is unlocked, the stop surface 13b of the stop member 13 fixed to the lock hook shaft 8 contacts the other first screw 10, which serves as a limit after unlocking.

[0010] Screw 20 is screwed onto shift fork 14. Rotating screw 20 can adjust the position of screw 20 relative to shift fork 14, thereby adjusting the gap between screw 20 and locking surface 12a.

[0011] When the telescopic flight lock 2 is locked, there is only a 2mm gap between the locking surface 12a of the ring lock 12 and the screw 20 on the fork 14. If the fork 14 rotates at this time, the screw 20 screwed on the fork 14 will quickly contact the locking surface 12a. The screw 20 has a tendency to make the ring lock 12 continue to rotate in the locking direction, thus achieving reliable locking of the ring lock 12 against the rotational movement of the fork 14. When the telescopic flight lock 2 is unlocked, the locking surface 12a of the ring lock 12 moves away from the fork 14, thus achieving unlocking of the ring lock 12 against the fork 14.

[0012] The inner handle 16 and the fork 14 are respectively fixed to the inner handle shaft 15, and the inner handle shaft 15 is hinged to the hatch structure 1. When the fork 14 is locked by the loop lock 12, the inner handle 16 cannot rotate, thus locking the inner handle 16 by the loop lock 12. When the loop lock 12 releases the fork 14, the inner handle 16 can rotate under the action of external force, thus unlocking the inner handle 16 by the loop lock 12.

[0013] The second screw 17 is clamped onto the third support 19 by two first nuts 18. When the telescopic flight lock 2 is locked, the inner handle 16 contacts the second screw 17, thereby stopping the downward rotation of the inner handle 16. When the telescopic flight lock 2 is unlocked, external force can operate the inner handle 16 to rotate upward to open. According to the attitude adjustment needs, the position of the second screw 17 clamped onto the third support 19 can be adjusted by the two first nuts 18 to achieve the limit adjustment of the second screw 17 on the inner handle 16.

[0014] The present invention has the following advantages and beneficial effects:

[0015] (1) Reliable locking. This invention uses a telescopic flight lock as the power source of the mechanism and utilizes the crank-slider principle to control the loop lock. The locking surface of the loop mechanism has a self-locking tendency. If the inner handle is accidentally operated in the locked state, the lock hook will tend to lock when it is subjected to the action of the fork, ensuring reliable locking of the mechanism.

[0016] (2) Precise adjustment. The present invention is designed with multiple adjustment measures such as adjustable connecting rods and limit screws, which can not only adjust the initial state of the locking mechanism, but also adapt to the posture of the inner handle for convenient adjustment, greatly reducing the difficulty of adjustment and improving work efficiency.

[0017] (3) Compact structure. The present invention adopts the crank-slider principle combined with threaded adjustment measures, which is simple in structure, precise in adjustment, occupies little space, and improves the overall design layout of the hatch.

[0018] (4) Wide range of applications. This invention has good applicability and can be widely applied to the locking design of the rotating mechanism of various hatches, and can also be used for stepless precision adjustment of other mechanical products.

[0019] In summary, this invention achieves reliable locking of the handle inside the hatch, solves the adjustment problem of existing handle mechanisms inside the hatch, avoids the risk of reverse drive of the mechanism, and provides a handle locking mechanism that is compact, simple in structure, precise in adjustment, and low in cost. Attached Figure Description

[0020] Figure 1 An isometric drawing of an internal handle locking mechanism for an aircraft cabin door.

[0021] Figure 2 This is an intentional design for a drive device for an internal handle locking mechanism of an aircraft cabin door.

[0022] Figure 3 This is a schematic diagram of an internal handle locking mechanism for an aircraft cabin door.

[0023] Figure 4 This is a schematic diagram of a loop-shaped locking hook for an internal handle locking mechanism of an aircraft cabin door.

[0024] Figure 5 This is a schematic diagram of the stop component of an internal handle locking mechanism for an aircraft cabin door.

[0025] Figure 6 This is a schematic diagram of a loop-shaped locking hook connection for an internal handle locking mechanism of an aircraft cabin door.

[0026] Figure 7 This is a schematic diagram of the fork connection of an internal handle locking mechanism for an aircraft cabin door.

[0027] Figure 8 This is a schematic diagram of the handle limit of an internal handle locking mechanism for an aircraft cabin door.

[0028] Figure 9 This is a schematic diagram of the locked state of an internal handle locking mechanism for an aircraft cabin door.

[0029] Figure 10 A schematic diagram of the unlocked state of the inner handle locking mechanism of an aircraft cabin door.

[0030] In the diagram: 1. Door structure; 2. Telescopic flight lock; 3. First support; 4. Shaft; 5. Adjustable linkage; 6. Bolt; 7. Rocker arm; 8. Lock hook shaft; 9. Second support; 10. First screw; 11. Double nut; 12. Ring lock; 13. Stop; 14. Shift fork; 15. Inner handle shaft; 16. Inner handle; 17. Second screw; 18. First nut; 19. Third support; 20. Adjustable screw; 21. Second nut.

[0031] 12a Locking surface; 13a Stopping surface; 13b Stopping surface. Detailed Implementation

[0032] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain the structural principles of this application, and are not intended to limit this application. The accompanying drawings are not drawn to scale, but are only appropriate simplified drawings to illustrate the various features of the basic principles of the invention. The specific design features disclosed in this application, such as specific dimensions, orientations, positions and shapes, will be determined in part by the specific application and usage environment.

[0033] It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0034] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, terms such as “hinged,” “fixed,” “screwed,” “locked,” and “unlocked” used in the description of this application should be interpreted broadly. For example, a hinged connection can be a connection using a bolt as a rotating axis, a stepped axis as a rotating axis, or a hole-axis connection between two components. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0035] The mechanism of the present invention will now be described in detail with reference to the accompanying drawings:

[0036] See Figure 1 This is an isometric drawing of an internal handle locking mechanism for an aircraft cabin door. A telescopic flight lock 2 is fixedly connected to a first support 3, which is also fixedly connected to the cabin door structure 1. One end of an adjustable link 5 is hinged to the telescopic flight lock 2 via a shaft 4, and the other end of the adjustable link 5 is hinged to a rocker arm 7 via a bolt 6. The rocker arm 7 is fixedly connected to a lock hook shaft 8. Two first screws 10 are clamped to a second support 9 via double nuts 11, and the second support 9 is fixedly connected to the cabin door structure 1. The loop lock 12 and the stop 13 are respectively fixed to the lock hook shaft 8, the lock hook shaft 8 is hinged to the hatch structure 1, the shift fork 14 and the inner handle 16 are respectively fixed to the inner handle shaft 15, the inner handle shaft 15 is hinged to the hatch structure 1, the screw 20 is screwed to the shift fork 14, the second nut 21 locks the screw 20 to the shift fork 14, the second screw 17 is clamped to the third support 19 by two first nuts 18, and the third support 19 is fixed to the hatch structure 1.

[0037] See Figure 2 This is a schematic diagram of a drive device for an internal handle locking mechanism of an aircraft cabin door. A telescopic flight lock 2 is fixedly connected to a first support 3. The two ends of an adjustable link 5 are respectively hinged to the telescopic flight lock 5 and a rocker arm 7. The rocker arm 7 is fixedly connected to a lock hook shaft 8, and the lock hook shaft 8 is hinged to the cabin door structure 1. When the telescopic flight lock 2 is extended, the adjustable link 5 drives the rocker arm 7 to rotate counterclockwise, and the rocker arm 7 drives the lock hook shaft 8 to rotate counterclockwise. When the telescopic flight lock 2 is shortened, the adjustable link 5 drives the rocker arm 7 to rotate clockwise, and the rocker arm 7 drives the lock hook shaft 8 to rotate clockwise.

[0038] See Figure 3This is a schematic diagram of an internal handle locking mechanism for an aircraft cabin door. When the locking hook shaft 8 rotates counterclockwise, the loop lock 12 and the stop 13 fixed to the locking hook shaft 8 also rotate counterclockwise until the stop surface 13a on the stop 13 contacts the stop pin 10 fixed to the second support 9. At this time, the locking hook shaft 8 stops rotating counterclockwise, and the loop lock 12 locks the fork 14, ensuring that the fork 14 cannot rotate, thus locking the internal handle 16. When the locking hook shaft 8 rotates clockwise, the loop lock 12 and the stop 13 fixed to the locking hook shaft 8 also rotate clockwise until the stop surface 13b on the stop 13 contacts the stop pin 10 fixed to the second support 9. At this time, the locking hook shaft 8 stops rotating clockwise, and the loop lock 12 disengages from the fork 14, thus unlocking the internal handle 16.

[0039] See Figure 4 This is a schematic diagram of a loop-shaped locking hook for an inner handle locking mechanism of an aircraft cabin door. The cavity of the loop-shaped lock 12 is designed with a locking surface 12a. When the locking surface 12a is rotated into position, it can lock the fork 14 fixed to the inner handle shaft 15.

[0040] See Figure 5 This is a schematic diagram of a stop component of an internal handle locking mechanism for an aircraft cabin door. The stop component 13 is designed with a stop surface 13a and a stop surface 13b. In the locked state, the stop surface 13a contacts the first screw 10 to achieve the locking limit; in the unlocked state, the stop surface 13b contacts the first screw 10 to achieve the unlocking limit.

[0041] See Figure 6 This is a schematic diagram of the loop lock hook connection of an inner handle locking mechanism for an aircraft cabin door. The loop lock 12 and the stop 13 are respectively fixed to the lock hook shaft 8. In the locked state, the stop surface 13a of the stop 13 contacts the first screw 10. In the unlocked state, the stop surface 13b of the stop 13 contacts the first screw 10. By adjusting the two nuts 11, the position of the screw 11 clamped on the second support 9 can be changed, thereby realizing the attitude adjustment of the loop lock 12.

[0042] See Figure 7 This is a schematic diagram of the fork connection of the inner handle locking mechanism of an aircraft cabin door. The screw 20 is screwed to the fork 14. Rotating the screw 20 can adjust the position of the head of the screw 20 relative to the fork 14 to adapt to the contact gap of the overall mechanism and ensure that the fork 14 is reliably locked by the back lock 12. After the screw 20 is adjusted, the second nut 21 is tightened, and the second nut 21 locks the screw 21 on the fork 14.

[0043] See Figure 8This is a schematic diagram of the handle limiting mechanism of the inner handle locking mechanism of an aircraft cabin door. Two first nuts 18 tighten the second screw 17 onto the third support 19. The first nuts 18 are adjusted as needed to ensure that the second screw 17 is in contact with the inner handle 16, thereby limiting the inner handle 16 by the second screw 17 in the closed position.

[0044] See Figure 9 This is a schematic diagram of the locking state of an inner handle locking mechanism for an aircraft cabin door. The screw 21 screwed onto the fork 14 has a certain gap from the locking surface 12a of the loop lock 12. This gap is used to avoid motion interference when the loop lock 12 is unlocked. In the locked state, if the fork 14 is rotated counterclockwise by the inner handle 16, the locking surface 12a of the loop lock 12 will contact the screw 21. At this time, the fork 14 cannot continue to rotate, thus achieving a locking effect. The loop lock 12 will generate a counterclockwise rotation tendency under the action of the screw 21. This tendency will drive the locking hook shaft 8 to rotate counterclockwise. The rotation tendency of the locking hook shaft 8 will cause the stopping surface 13a of the stop member 13 fixed to the locking hook shaft 8 to be limited by the first screw 10, thereby realizing the locking effect of the loop lock 12 on the fork 14.

[0045] See Figure 10 This is a schematic diagram of the unlocked state of the inner handle locking mechanism of an aircraft cabin door. The loop lock 12 rotates clockwise under the drive of the telescopic flight lock 2, releasing the lock lock 12 from locking the fork 14. At this time, the fork 14 fixed to the inner handle 15 can rotate clockwise, thus completing the unlocking of the inner handle 16 by the telescopic flight lock 2.

[0046] The above-described embodiments are merely illustrative of the implementation methods of the present invention, but should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the protection scope of the present invention.

Claims

1. An inner handle locking mechanism for an aircraft cabin door, characterized in that, The aircraft cabin door's inner handle locking mechanism includes a telescopic flight lock (2), a first support (3), an adjustable linkage (5), a rocker arm (7), a lock hook shaft (8), a second support (9), a first screw (10), a loop lock (12), a stop (13), a shift fork (14), an inner handle shaft (15), an inner handle (16), a first nut (18), a third support (19), and a second nut (21); specifically: The telescopic flight lock (2) is fixedly connected to the first support (3), and the first support (3) is fixedly connected to the door structure (1); The adjustable link (5) is hinged to the telescopic flight lock (2) and the rocker arm (7) at both ends, and the rocker arm (7) is fixed to the lock hook shaft (8); The first screw (10) is provided in two parts, which are clamped to the second support (9) by double nuts (11), and the second support (9) is fixed to the hatch structure (1); The loop lock (12) and the stop (13) are respectively fixed to the lock hook shaft (8), and the lock hook shaft (8) is hinged to the hatch structure (1); The fork (14) and the inner handle (16) are respectively fixed to the inner handle shaft (15), the inner handle shaft (15) is hinged to the door structure (1), and the adjustable screw (20) is screwed to the fork (14). By rotating the screw (20), the position of the adjustable screw (20) relative to the fork (14) can be adjusted. The second nut (21) locks the adjustable screw (20) onto the shift fork (14), and the second screw (17) is clamped onto the third support (19), which is fixed to the hatch structure (1).

2. The aircraft cabin door inner handle locking mechanism according to claim 1, characterized in that, The telescopic flight lock (2) drives the rocker arm (7) to rotate via the adjustable link (5), and the rocker arm (7) drives the lock hook shaft (8) to rotate.

3. The aircraft cabin door inner handle locking mechanism according to claim 1, characterized in that, The second screw (17) is clamped onto the third support (19) by two first nuts (18); when the telescopic flight lock (2) is locked, the inner handle (16) contacts the second screw (17) to stop the downward rotation of the inner handle (16); when the telescopic flight lock (2) is unlocked, external force can operate the inner handle (16) to rotate upward to open. According to the attitude adjustment needs, the position of the second screw (17) clamped onto the third support (19) is adjusted by the two first nuts (18) to achieve the limit adjustment of the second screw (17) on the inner handle (16).

4. The aircraft cabin door inner handle locking mechanism according to claim 1, characterized in that, One end of the adjustable link (5) is hinged to the telescopic flight lock (2) via a shaft (4), and the other end of the adjustable link (5) is hinged to the rocker arm (7) via a bolt (6). Since the rocker arm (7) is fixed to the lock hook shaft (8) and the lock hook shaft (8) is hinged to the door structure (1), when the telescopic flight lock (2) is extended, the adjustable link (5) drives the rocker arm (7) to rotate counterclockwise, and the rocker arm (7) drives the lock hook shaft (8) to rotate counterclockwise. When the telescopic flight lock (2) is shortened, the adjustable link (5) drives the rocker arm (7) to rotate clockwise, and the rocker arm (7) drives the lock hook shaft (8) to rotate clockwise.

5. The inner handle locking mechanism for an aircraft cabin door according to claim 1, characterized in that: The cavity of the loop lock (12) is designed with a locking surface (12a). When the locking surface (12a) is rotated to a certain position, it can lock the fork (14) fixed to the inner handle shaft (15). The stop (13) is designed with a stop surface (13a) and a stop surface (13b).

6. The aircraft cabin door inner handle locking mechanism according to claim 5, characterized in that, When the fork (14) is locked by the lock (12), the inner handle (16) cannot rotate, thus locking the inner handle (16) by the lock (12). When the lock (12) releases the fork (14), the inner handle (16) rotates under the action of external force, thus unlocking the inner handle (16) by the lock (12).

7. The aircraft cabin door inner handle locking mechanism according to claim 6, characterized in that, The locking and unlocking of the inner handle (16) by the ring lock (12) are specifically as follows: When the telescopic flight lock (2) is locked: When the lock hook shaft (8) rotates counterclockwise, the loop lock (12) and the stop (13) fixed on the lock hook shaft (8) also rotate counterclockwise until the stop surface (13a) on the stop (13) fixed on the lock hook shaft (8) contacts the first screw (10) fixed on the second support (9), which plays a limiting role after locking; at this time, the lock hook shaft (8) stops rotating counterclockwise, and the loop lock (12) locks the fork (14), realizing the locking of the loop lock (12) to the inner handle (16); When the telescopic flight lock (2) is unlocked: When the lock hook shaft (8) rotates clockwise, the loop lock (12) and the stop (13) fixed on the lock hook shaft (8) also rotate clockwise until the stop surface (13b) on the stop (13) fixed on the lock hook shaft (8) contacts the first screw (10) fixed on the second support (9), which plays a limiting role after unlocking; at this time, the lock hook shaft (8) stops rotating clockwise, the loop lock (12) disengages from the fork (14), and the loop lock (12) unlocks the inner handle (16).

8. The aircraft cabin door inner handle locking mechanism according to claim 1, characterized in that, The posture of the loop lock (12) can be adjusted by changing the position of the double nuts (11) clamped on the second support (9).

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