Sealing cabin door interlocking mechanism

Abstract

The invention belongs to the technical field of airplane structure design, and relates to a sealing cabin door interlocking mechanism. The device comprises an upper lock assembly, a claw-shaped rocker arm, a rotating shaft, a connecting rod and a lower lock assembly, the upper lock assembly is mounted on a fuselage structure, a roller rocker arm is driven to rotate through an interlocking mechanism actuating cylinder, and the roller rocker arm drives a rocker arm lock hook to hook or release an upper rotating shaft mounted on a cabin door and also drives a roller to deflect; the claw-shaped rocker arm is hinged to the cabin door, is provided with a notch for accommodating a roller, and is connected with a lower lock mechanism driving rocker arm of the lower lock assembly through a rotating shaft and a connecting rod; the lower lock assembly is installed on the sealing cabin door, and the rocker arm is driven by the lower lock mechanism to drive the upper lock hook and the lower lock hook to hold or release a lower rotating shaft of the lower assembly installed on the inclined table. The reliability of the sealed cabin door lock mechanism is improved.

Description

Technical Field

[0001] This application belongs to the field of aircraft structural design technology, and specifically relates to a sealed cabin door interlocking mechanism. Background Technology

[0002] To maximize the loading passage for large cargo, transport aircraft often have sealed cargo doors. Some aircraft, in an effort to save weight, feature two-way sealed cargo doors. When closed, these doors act as airtight partitions to pressurize the cargo hold; when opened upwards and locked, they create a cargo passage; and when opened downwards, they function as cargo bridges for loading cargo. However, due to the complexity of interlocking mechanisms, there are currently no similar interlocking mechanisms that meet the requirements of sealed doors. Summary of the Invention

[0003] To address the aforementioned issues, this application provides a sealed hatch interlock mechanism, which mainly includes an upper lock assembly, a claw-type rocker arm, a rotating shaft, a connecting rod, and a lower lock assembly.

[0004] The upper locking assembly is installed on the fuselage structure. The roller rocker arm is driven to rotate through the interlocking mechanism actuator. The roller rocker arm drives the rocker arm lock hook to hook or release the upper rotating shaft installed on the hatch, and at the same time drives the roller to deflect.

[0005] The claw-shaped rocker arm is hinged to the hatch and has a slot for accommodating rollers. The claw-shaped rocker arm is connected to the lower locking mechanism of the lower locking assembly via a rotating shaft and connecting rod to drive the rocker arm.

[0006] The lower locking assembly is installed on the sealed hatch. The lower locking mechanism drives the rocker arm to engage or release the lower rotating shaft of the lower assembly, which is mounted on the inclined platform.

[0007] When the upper locking assembly hooks onto the upper rotating shaft, the lower locking assembly releases the lower rotating shaft; conversely, when the upper locking assembly releases the upper rotating shaft, the lower locking assembly holds the lower rotating shaft.

[0008] Preferably, the output shaft of the interlocking mechanism actuator is hinged to the upper locking link via a rocker arm, and the upper locking link is hinged to the roller rocker arm.

[0009] Preferably, the upper locking link between the rocker arm and the roller rocker arm passes through the dead center and is held in position by the upper locking spring.

[0010] Preferably, the upper locking assembly is further provided with a stop block, which has a stop surface. When the upper locking assembly is locked, the surface of the roller rocker arm cooperates with the surface of the stop block to stop.

[0011] Preferably, a speed reduction mechanism assembly is provided between the rotating shaft and the connecting rod. The speed reduction mechanism assembly includes a rotating shaft rocker arm connected to the rotating shaft. The rotating shaft rocker arm is hinged to the speed reduction mechanism rocker arm via a pull rod. One end of the speed reduction mechanism rocker arm that is hinged to the pull rod is also hinged to the connecting rod, and the other end is hinged to the hatch.

[0012] Preferably, a reversing mechanism is provided between the connecting rod and the lower locking assembly. The reversing mechanism includes a reversing mechanism rocker arm, a first pull rod, a bidirectional rocker arm, and a second pull rod. The connecting rod is hinged to the first pull rod through the reversing mechanism rocker arm. The other end of the first pull rod is hinged to the first end of the bidirectional rocker arm. The second end of the bidirectional rocker arm is hinged to the lower locking mechanism driving rocker arm through the second pull rod.

[0013] This application interlocks the upper and lower locking components. The surface fit between the roller rocker arm, the rocker arm lock hook, and the stop block ensures that the upper locking component will not open the sealed hatch upwards when the lower locking component is unlocked. The cooperation between the roller rocker arm and the claw-type rocker arm ensures that the upper lock can be completely disengaged from the sealed hatch after unlocking, and the lower locking mechanism locks. This ensures that when the sealed hatch is opened downwards, the upper part can be completely disengaged and the lower part can be reliably locked, greatly improving the reliability of the sealed hatch locking mechanism. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structural composition of a preferred embodiment of the sealed hatch interlocking mechanism of this application.

[0015] Figure 2 This application Figure 1 A schematic diagram of the upper lock assembly structure in the embodiment shown.

[0016] Figure 3 yes Figure 2 Rear view of the embodiment shown.

[0017] Figure 4 This is a schematic diagram showing the connection between the upper locking assembly and the claw-shaped rocker arm.

[0018] Figure 5 This is a schematic diagram of the roller rocker arm structure.

[0019] Figure 6 This is a schematic diagram of the speed reduction mechanism.

[0020] Figure 7 This is a schematic diagram of the reversing mechanism.

[0021] Figure 8 This is a schematic diagram of the lower lock assembly.

[0022] Among them, 1-upper lock assembly, 2-claw-shaped rocker arm, 3-rotating shaft, 4-speed reduction mechanism, 5-connecting rod, 6-reversing mechanism, 7-lower lock assembly, 8-lower assembly, 10-interlocking mechanism actuator, 11-upward opening drive rocker arm, 12-spring device connecting rod, 13-rocker arm, 14-upper lock spring device, 15-upper lock connecting rod, 16-roller rocker arm, 17-sealed hatch upward opening rotating shaft, 18-roller, 19-stop block, 20-rocker arm lock hook, 24-reversing mechanism rocker arm, 25-first pull rod, 26-bidirectional rocker arm, 27-second pull rod, 28-lower lock mechanism mounting support, 29-lower lock mechanism spring device, 30-lower lock mechanism drive rocker arm, 31-stop hook, 32-upper lock hook, 33-lower lock hook, 34-lower lock mechanism connecting rod. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] This application provides a sealed hatch interlock mechanism, such as Figures 1-6 The main components include an upper locking assembly 1, a claw-shaped rocker arm 2, a rotating shaft 3, a connecting rod 5, and a lower locking assembly 7.

[0025] The upper locking assembly 1 is installed on the fuselage structure. The roller rocker arm 16 is driven to rotate by the interlocking mechanism actuator cylinder 10. The roller rocker arm 16 drives the rocker arm locking hook 20 to hook or release the upper rotating shaft installed on the hatch, and at the same time drives the roller 18 to deflect.

[0026] The claw-shaped rocker arm 2 is hinged to the hatch and has a slot for accommodating the roller 18. The claw-shaped rocker arm 2 is connected to the lower locking mechanism of the lower locking assembly 7 via the rotating shaft 3 and the connecting rod 5 to drive the rocker arm 30.

[0027] The lower locking assembly 7 is installed on the sealed hatch. The lower locking mechanism drives the rocker arm 30 to drive the upper locking hook 32 and the lower locking hook 33 to clamp or release the lower rotating shaft of the lower assembly 8 installed on the inclined platform.

[0028] When the upper locking component 1 hooks onto the upper rotating shaft, the lower locking component 7 releases the lower rotating shaft; conversely, when the upper locking component 1 releases the upper rotating shaft, the lower locking component 7 holds the lower rotating shaft tightly.

[0029] The working principle of this application is to drive the roller rocker arm 16 through the actuator 10 to simultaneously control the upper lock hook 20 and the roller 18, and transmit the action to the lower lock assembly through the linkage mechanism shaft, connecting rod, etc., to achieve mutual exclusion of the upper and lower lock states. This embodiment ensures strict mutual exclusion of the upper and lower lock states through mechanical linkage, avoiding the hatch being in the upper and lower lock states at the same time due to misoperation, and is suitable for sealed hatches with bidirectional movement.

[0030] In some alternative embodiments, the output shaft of the interlocking mechanism actuator 10 is hinged to the upper locking link 15 via the rocker arm 13, and the upper locking link 15 is hinged to the roller rocker arm 16.

[0031] In some alternative embodiments, the upper locking link 15 between the rocker arm 13 and the roller rocker arm 16 passes through the dead point and is held in position by the upper locking spring 14.

[0032] This embodiment provides a mechanical self-locking structure through the dead point, reducing the need for continuous power supply to the actuator.

[0033] In some optional embodiments, the upper locking assembly 1 is further provided with a stop block 19, which has a stop surface. When the upper locking assembly is locked, the surface of the roller rocker arm 16 cooperates with the surface of the stop block 19 to stop.

[0034] In this embodiment, the stop block 19 and the roller rocker arm 16 are fitted together to restrict the displacement of the roller rocker arm when locked, so as to prevent the lock hook from loosening due to inertia or reverse load.

[0035] In some alternative embodiments, a speed reduction mechanism assembly 4 is provided between the rotating shaft 3 and the connecting rod 5. The speed reduction mechanism assembly 4 includes a rotating shaft rocker arm 21 connected to the rotating shaft 3. The rotating shaft rocker arm 21 is hinged to a speed reduction mechanism rocker arm 23 via a pull rod 22. One end of the speed reduction mechanism rocker arm 23, which is hinged to the pull rod 22, is also hinged to the connecting rod 5, and the other end is hinged to the hatch.

[0036] This embodiment converts the rapid rotation of the rotating shaft 3 into the slow linear motion of the connecting rod 5. The motion angle transmitted by the rotating shaft rocker arm 21 is reduced through the connecting rod 22, thereby achieving smooth operation of the lower lock.

[0037] In some optional embodiments, a reversing mechanism 6 is provided between the connecting rod 5 and the lower locking assembly 7. The reversing mechanism 6 includes a reversing mechanism rocker arm 24, a first pull rod 25, a bidirectional rocker arm 26, and a second pull rod 27. The connecting rod 5 is hinged to the first pull rod 25 through the reversing mechanism rocker arm 24. The other end of the first pull rod 25 is hinged to the first end of the bidirectional rocker arm 26. The second end of the bidirectional rocker arm 26 is hinged to the lower locking mechanism drive rocker arm 30 through the second pull rod 27.

[0038] The main function of this embodiment is to amplify the force arm transmitted by the deceleration component 4 and adjust the direction of motion.

[0039] In summary, when the sealed hatch needs to be opened upwards, the interlocking mechanism actuator 10 retracts, driving the roller rocker arm 16 to rotate via the rocker arm 13 and the upper locking link 15 until the surface of the roller rocker arm 16 engages with the surface of the stop block 19 to stop. The rocker arm 13 and the roller rocker arm 16 pass through the dead point via the upper locking link 15 and are held in this position by the upper locking spring 14. At this time, the upper locking assembly is locked. The lower locking mechanism drives the rocker arm 30 via the rotating shaft 3, the speed reduction mechanism assembly 4, the link 5, and the reversing mechanism 6 to drive the upper locking hook 32 and the lower locking hook 33 to the unlocked position via the lower locking link 34 and are held in the unlocked position by the lower locking mechanism spring device 29. At this time, the lower locking assembly is unlocked, and the sealed hatch is disengaged from the inclined platform structure. At this time, the sealed hatch can be flipped upwards.

[0040] When the sealed hatch needs to be opened downwards, the interlock mechanism actuator 10 extends, driving the roller rocker arm 16 to rotate counterclockwise, which in turn rotates the claw rocker arm 2 through the roller 18 until the roller 18 disengages from the claw rocker arm 2; at the same time, the roller rocker arm 16 disengages from the stop block 19, at which point the upper lock is unlocked, and the sealed hatch is disengaged from the upper lock; simultaneously, when the upper lock assembly is unlocked, the lower lock mechanism drives the rocker arm 30 through the intermediate linkage components, which in turn drives the upper lock hook 32 and the lower lock hook 33 to rotate and be in the locked position through the lower lock mechanism connecting rod 34. The upper and lower lock hooks are fixed in this position through the lower lock connecting rod passing the dead point and the stop hook 31, and are held in the locked position by the lower lock mechanism spring device 29. At this time, the sealed hatch can be flipped down.

[0041] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sealed hatch interlock mechanism, characterized in that, It includes an upper locking assembly (1), a claw-shaped rocker arm (2), a rotating shaft (3), a connecting rod (5), and a lower locking assembly (7). The upper locking assembly (1) is installed on the fuselage structure. The roller rocker arm (16) is driven to rotate by the interlocking mechanism actuator (10). The roller rocker arm (16) drives the rocker arm locking hook (20) to hook or release the upper rotating shaft installed on the hatch, and at the same time drives the roller (18) to deflect. The claw-shaped rocker arm (2) is hinged to the hatch and has a slot for accommodating the roller (18). The claw-shaped rocker arm (2) is connected to the lower locking mechanism of the lower locking assembly (7) via a pivot (3) and a connecting rod (5) to drive the rocker arm (30). The lower locking assembly (7) is installed on the sealed hatch. The lower locking mechanism drives the rocker arm (30) to drive the upper locking hook (32) and the lower locking hook (33) to grip or release the lower rotating shaft of the lower assembly (8) installed on the inclined platform. When the upper locking component (1) hooks the upper rotating shaft, the lower locking component (7) releases the lower rotating shaft; conversely, when the upper locking component (1) releases the upper rotating shaft, the lower locking component (7) holds the lower rotating shaft tightly.

2. The sealed hatch interlock mechanism as described in claim 1, characterized in that, The output shaft of the interlocking mechanism actuator cylinder (10) is hinged to the upper locking link (15) via the rocker arm (13), and the upper locking link (15) is hinged to the roller rocker arm (16).

3. The sealed hatch interlock mechanism as described in claim 2, characterized in that, The upper locking link (15) between the rocker arm (13) and the roller rocker arm (16) passes through the dead point and is held in position by the upper locking spring (14).

4. The sealed hatch interlock mechanism as described in claim 1, characterized in that, The upper lock assembly (1) is also provided with a stop block (19), which has a stop surface. When the upper lock assembly is locked, the surface of the roller rocker arm (16) and the surface of the stop block (19) cooperate to stop.

5. The sealed hatch interlock mechanism as described in claim 1, characterized in that, A speed reduction mechanism assembly (4) is provided between the rotating shaft (3) and the connecting rod (5). The speed reduction mechanism assembly (4) includes a rotating shaft rocker arm (21) connected to the rotating shaft (3). The rotating shaft rocker arm (21) is hinged to the speed reduction mechanism rocker arm (23) via a pull rod (22). One end of the speed reduction mechanism rocker arm (23) is hinged to the pull rod (22) and the connecting rod (5) is also hinged to the connecting rod (5). The other end is hinged to the hatch.

6. The sealed hatch interlock mechanism as described in claim 1, characterized in that, A reversing mechanism (6) is provided between the connecting rod (5) and the lower locking assembly (7). The reversing mechanism (6) includes a reversing mechanism rocker arm (24), a first pull rod (25), a bidirectional rocker arm (26), and a second pull rod (27). The connecting rod (5) is hinged to the first pull rod (25) through the reversing mechanism rocker arm (24). The other end of the first pull rod (25) is hinged to the first end of the bidirectional rocker arm (26). The second end of the bidirectional rocker arm (26) is hinged to the lower locking mechanism driving rocker arm (30) through the second pull rod (27).

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