A multifunctional rear sealed door for heavy transport aircraft

Abstract

This application belongs to the field of aircraft design, and specifically relates to a multi-functional rear sealed door for heavy transport aircraft. The application provides a multi-functional rear sealed door for heavy transport aircraft, comprising: a hatch, a sealed door, and a ramp; the hatch is located at the tail of the aircraft, and the sealed door is located at the ramp inside the hatch. The sealed door includes: an upper sealed door and a lower sealed door; one end of the upper sealed door is hinged above the cargo hold exit via a first pivot, and the other end has a second pivot; one end of the ramp retracts around a fixed axis at the end of the cargo hold, and the other end has a third pivot; wherein, the second pivot has a control device for connecting the upper sealed door and the lower sealed door and driving the lower sealed door to rotate around the second pivot or unlocking the lower sealed door to separate it from the upper sealed door; the third pivot has a control device for connecting and locking the ramp and the lower sealed door and driving the lower sealed door to rotate around the third pivot or unlocking the lower sealed door to separate it from the ramp.

Description

Technical Field

[0001] This application belongs to the field of aircraft design, and specifically relates to a multi-functional rear-sealed door for heavy transport aircraft. Background Technology

[0002] Conventional transport aircraft sealing doors are single, upward-opening designs. Crane rails are installed on both sides inside the door. When the door is opened, the upper rail connects with the rails inside the cargo hold and at the rear of the door, forming a crane access channel. However, this type of sealing door requires the cargo hold to have equal vertical width, or, to ensure the door can be opened upwards, the door width is compressed, resulting in a smaller clear width at the sealing door and affecting loading or airdrop access.

[0003] The traditional single-piece, top-hinged sealed door design is unsuitable for the pear-shaped (narrower at the top, wider at the bottom) cargo hold profile of heavy transport aircraft, as the narrower upper section prevents a sealed door of equal width from opening upwards. Conventional heavy transport aircraft sealed door designs retain onboard cranes, but airdrop capabilities cannot be simultaneously achieved. This invention proposes a multi-functional large sealed door design method that achieves compatibility between the lifting and airdrop functions of the rear sealed door of heavy transport aircraft. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a multi-functional rear sealing door for heavy transport aircraft, comprising:

[0005] hatches, sealed doors, and ramps;

[0006] The cabin door is located at the rear of the aircraft, and the sealed door is located on the ramp inside the cabin door.

[0007] The sealing door includes an upper sealing door and a lower sealing door; one end of the upper sealing door is hinged above the cargo hold outlet via a first pivot, and the other end has a second pivot; one end of the ramp extends and retracts around the fixed axis at the end of the cargo hold, and the other end has a third pivot.

[0008] The second rotating shaft has a control device, which is used to connect the upper sealing door and the lower sealing door and drive the lower sealing door to rotate around the second rotating shaft or unlock the lower sealing door to separate it from the upper sealing door.

[0009] The third rotating shaft has a control device, which is used to connect and lock the inclined platform and the lower sealing door and drive the lower sealing door to rotate around the third rotating shaft or to unlock the lower sealing door to separate it from the inclined platform.

[0010] Preferably, the control device for the lower sealing door includes a locking device and a driving device. The locking device fixes or separates the second rotating shaft from the lower sealing door, and the driving device drives the second rotating shaft to rotate relative to the upper sealing door. The control device for the inclined platform includes a locking device and a driving device. The locking device fixes or separates the third rotating shaft from the lower sealing door, and the driving device drives the third rotating shaft to rotate relative to the inclined platform.

[0011] Preferably, the hatch includes a middle hatch, a left hatch, and a right hatch; the middle hatch is connected to the fuselage via a middle hatch drive rod, the left hatch is connected to the fuselage via a left hatch drive rod, and the right hatch is connected to the fuselage via a right hatch drive rod.

[0012] Preferably, the cargo hold has an onboard crane on top, which reciprocates along a crane rail on top of the cargo hold.

[0013] Preferably, the door frame on both sides of the upper sealing door has a right-side fixed airtight section and a left-side fixed airtight section, respectively.

[0014] Preferably, it has multiple functional states, including fully closed sealed door state, airdrop state, ground hoisting state, and ground self-loading state.

[0015] Preferably, when the sealing door is fully closed, the lower sealing door rotates around the third pivot, pressing against the upper sealing door from the outside in, thus closing the hatch.

[0016] Preferably, during airdrop, the middle cabin door is driven by the middle cabin door drive lever to slide upward and backward to open, the left and right cabin doors are driven by the left and right cabin door drive levers to flip outward and open, the ramp is driven by the ramp hydraulic lever to flip downward and flatten around the ramp axis, and the lower sealing door flips outward and upward and flatten around the second axis.

[0017] Preferably, during ground hoisting, the middle hatch is driven by the middle hatch drive rod to slide upward and backward to open, the left and right hatches are driven by the left and right hatch drive rods to flip outward and open, the ramp is driven by the ramp hydraulic pull rod to flip downward around the ramp axis to the maximum angle, the lower sealing door flips outward and downward around the third axis and then continues to flip forward to lie flat on the ramp, and the upper sealing door flips outward and upward around the first axis to flatten.

[0018] The advantages of this application include: This invention solves the problem of decoupling the hoisting and airdrop functions of the rear door of a pear-shaped ultra-wide cargo hold heavy transport aircraft on the sealed door, and solves the contradiction between the self-support capability and airdrop capability of heavy transport aircraft, greatly improving the mission capability of heavy transport aircraft, and has great application prospects and significance. Attached Figure Description

[0019] Figure 1 This is a side view of the multi-functional rear sealed door of a heavy transport aircraft in its fully closed state.

[0020] Figure 2 This is a rear view of the multi-functional rear sealed door of a heavy transport aircraft in its fully closed state.

[0021] Figure 3This is a side view of the multi-functional rear sealed door of a heavy transport aircraft in airdrop mode.

[0022] Figure 4 This is a rear view of the multi-functional rear-sealed door of a heavy transport aircraft in airdrop mode.

[0023] Figure 5 This is a side view of the ground hoisting status of the multi-functional rear-sealed gate of a heavy transport aircraft.

[0024] Figure 6 This is a rear view of the multi-functional rear-sealed gate of a heavy transport aircraft in its ground-mounted installation state.

[0025] Figure 7 This is a side view of the ground-mounted self-loading state of the multi-functional rear-sealed gate of a heavy transport aircraft.

[0026] Figure 8 This is a 3D view of the ground self-loading state of the multi-functional rear-sealed gate of a heavy transport aircraft.

[0027] Figure 9 This is a 3D view of the multi-functional rear sealed door of a heavy transport aircraft in its airdrop configuration.

[0028] Among them, 1-upper sealing door, 2-lower sealing door, 3-right fixed airtight section, 4-left fixed airtight section, 5-airborne crane, 6-sloping platform, 7-crew compartment floor, 8-middle compartment door, 9-toe plate, 10-cargo compartment floor, 11-middle compartment door drive lever (left), 12-middle compartment door drive lever (right), 13-left side compartment door, 14-right side compartment door, 15-left side compartment door drive lever, 16-right side compartment door drive lever, 17-sloping platform hydraulic lever (left), 18-sloping platform hydraulic lever (right). Detailed Implementation

[0029] 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 this application, not to limit this application. 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.

[0030] like Figures 1-9 As shown, this application provides a multi-functional rear sealed door for a heavy transport aircraft, including: a hatch, a sealed door, and a ramp 6;

[0031] The cargo door is located at the rear of the aircraft, on the belly side, and the sealed door is located at the cargo hold exit inside the cargo door.

[0032] The cargo doors include a center cargo door 8, a left cargo door 13, and a right cargo door 14. The center cargo door 8 is connected to the fuselage via a center cargo door drive rod. The left cargo door 13 is connected to the fuselage via a left cargo door drive rod 15, and the right cargo door 14 is connected to the fuselage via a right cargo door drive rod 16. An onboard crane 5 is located on the top of the cargo hold, and the onboard crane 5 reciprocates along a crane rail on the heading of the cargo hold.

[0033] The sealing door includes an upper sealing door 1 and a lower sealing door 2. One end of the upper sealing door 1 is hinged above the cargo hold outlet via a first pivot a, and the other end has a second pivot b. One end of the ramp 6 retracts around the fixed axis at the end of the cargo hold, and the other end has a third pivot c. The door frames on both sides of the upper sealing door 1 have a right fixed airtight section 3 and a left fixed airtight section 4, respectively.

[0034] The second rotating shaft b has a control device, which is used to connect the upper sealing door 1 and the lower sealing door 2 and drive the lower sealing door 2 to rotate around the second rotating shaft b or unlock the lower sealing door 2 to separate it from the upper sealing door 1.

[0035] The third rotating shaft c has a control device, which is used to connect and lock the inclined platform 6 and the lower sealing door 2 and drive the lower sealing door 2 to rotate around the third rotating shaft c or unlock the lower sealing door 2 to separate it from the inclined platform 6.

[0036] Preferably, the control device for the lower sealing door 2 includes a locking device and a driving device. The locking device fixes or separates the second rotating shaft b from the lower sealing door 2, and the driving device drives the second rotating shaft b to rotate relative to the upper sealing door 1. The control device for the inclined platform 6 includes a locking device and a driving device. The locking device fixes or separates the third rotating shaft c from the lower sealing door 2, and the driving device drives the third rotating shaft c to rotate relative to the inclined platform 6.

[0037] The multi-functional rear sealed door of the heavy transport aircraft in this application has multiple functional states, including fully closed sealed door state, airdrop state, ground hoisting state, and ground self-loading state.

[0038] With the sealed door fully closed, as shown in the attached document. Figures 1-2 The right fixed airtight section 3 and the left fixed airtight section 4 are fixedly connected to the sealing door frame, and the lower sealing door 2 presses against the upper sealing door 1 from the outside to the inside around the rotating shaft 3.

[0039] Airdrop status, as shown in the attached image. Figures 3-4 The middle cabin door 8 is driven by the middle cabin door drive lever (left) 11 and the middle cabin door drive lever (right) 12 to slide upward and backward to open. The left cabin door 13 and the right cabin door 14 are driven by the left cabin door drive lever 15 and the right cabin door drive lever 16 to flip outward and open. The ramp 6 is driven by the ramp hydraulic lever (left) 17 and the ramp hydraulic lever (right) 18 to flip downward and flatten around the ramp pivot axis. The lower sealing door 2 flips outward and upward and flatten around the second pivot axis b.

[0040] Ground hoisting status, as shown in the attached image. Figures 5-6 The middle cabin door 8 is driven by the middle cabin door drive lever (left) 11 and the middle cabin door drive lever (right) 12 to slide upward and backward to open. The left cabin door 13 and the right cabin door 14 are driven by the left cabin door drive lever 15 and the right cabin door drive lever 16 to flip outward and open. The ramp 6 is driven by the ramp hydraulic lever (left) 17 and the ramp hydraulic lever (right) 18 to flip downward around the ramp axis to the maximum angle. The lower sealing door 2 flips outward and downward around the third rotating axis c and then continues to flip forward and lie flat on the ramp 6. The upper sealing door 1 flips outward and upward around the first rotating axis a to flatten.

[0041] Ground self-loading status, as shown in the attached document. Figures 7-8 The middle cabin door 8 is driven upward and backward by the middle cabin door drive lever (left) 11 and the middle cabin door drive lever (right) 12 to slide out and open. The left cabin door 13 and the right cabin door 14 are driven outward and flipped open by the left cabin door drive lever 15 and the right cabin door drive lever 16. The ramp 6 is driven by the ramp hydraulic lever (left) 17 and the ramp hydraulic lever (right) 18 to flip downward around the ramp axis to the maximum angle. The lower sealing door 2 flips outward and downward around the third axis c to ground. During the flipping of the lower sealing door 2, its rear toe plate 9 unfolds outward around its axis and grounds together with the sealing door 2. The upper sealing door 1 flips outward and upward around the first axis a to flatten.

[0042] 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 multi-functional rear sealing door for heavy-duty transport aircraft, characterized in that, include: hatches, sealing doors and ramps (6); The cabin door is located at the rear of the aircraft, and the sealed door is located on the ramp inside the cabin door. The sealing door includes: an upper sealing door (1) and a lower sealing door (2); one end of the upper sealing door (1) is hinged above the cargo hold outlet via a first pivot (a), and the other end has a second pivot (b); one end of the ramp (6) is retracted around the fixed shaft at the end of the cargo hold, and the other end has a third pivot (c). The second rotating shaft (b) has a control device, which is used to connect the upper sealing door (1) and the lower sealing door (2) and drive the lower sealing door (2) to rotate around the second rotating shaft (b) or unlock the lower sealing door (2) to separate it from the upper sealing door (1); The third rotating shaft (c) has a control device, which is used to connect and lock the inclined platform (6) and the lower sealing door (2) and drive the lower sealing door (2) to rotate around the third rotating shaft (c) or unlock the lower sealing door (2) to separate it from the inclined platform (6); The control device of the lower sealing door (2) includes a locking device and a driving device. The locking device fixes or separates the second rotating shaft (b) from the lower sealing door (2), and the driving device drives the second rotating shaft (b) to rotate relative to the upper sealing door (1). The control device of the inclined platform (6) includes a locking device and a driving device. The locking device fixes or separates the third rotating shaft (c) from the lower sealing door (2), and the driving device drives the third rotating shaft (c) to rotate relative to the inclined platform (6). The door frame on both sides of the upper sealing door (1) has a right fixed airtight section (3) and a left fixed airtight section (4). In the airdrop state, the middle cabin door (8) is driven by the middle cabin door drive lever to slide upward and backward to open, the left cabin door (13) and the right cabin door (14) are driven by the left cabin door drive lever (15) and the right cabin door drive lever (16) to flip outward and open, the ramp (6) is driven by the ramp hydraulic lever to flip downward and flatten around the ramp pivot, and the lower sealing door (2) flips outward and upward and flatten around the second pivot (b).

2. The multi-functional rear sealing door for heavy transport aircraft as described in claim 1, characterized in that, The hatches include: a middle hatch (8), a left hatch (13), and a right hatch (14); the middle hatch (8) is connected to the fuselage by a middle hatch drive rod, the left hatch (13) is connected to the fuselage by a left hatch drive rod (15), and the right hatch (14) is connected to the fuselage by a right hatch drive rod (16).

3. The multi-functional rear sealing door for heavy transport aircraft as described in claim 1, characterized in that, The cargo hold has an onboard crane (5) on top, which moves back and forth along the crane rail on the cargo hold top.

4. The multi-functional rear sealing door for heavy transport aircraft as described in claim 1, characterized in that, It has multiple functional states, including fully closed sealed door state, airdrop state, ground hoisting state, and ground self-loading state.

5. The multi-functional rear sealing door for heavy-duty transport aircraft as described in claim 4, characterized in that, When the sealed door is fully closed, the lower sealed door (2) rotates around the third pivot (c), and the lower sealed door (2) presses against the upper sealed door (1) from the outside to the inside, thus closing the hatch.

6. The multi-functional rear sealing door for heavy transport aircraft as described in claim 1, characterized in that, When in the ground hoisting state, the middle cabin door (8) is driven by the middle cabin door drive rod to slide upward and backward to open. The left cabin door (13) and the right cabin door (14) are driven by the left cabin door drive rod (15) and the right cabin door drive rod (16) to flip outward and open. The ramp (6) is driven by the ramp hydraulic rod to flip downward around the ramp axis to the maximum angle. The lower sealing door (2) flips outward and downward around the third axis (c) and then continues to flip forward and lie on the ramp (6). The upper sealing door (1) flips outward and upward around the first axis (a) to flatten.

7. The multi-functional rear sealing door for heavy transport aircraft as described in claim 1, characterized in that, When the ground is in self-loading state, the middle cabin door (8) is driven by the middle cabin door drive lever to slide upward and backward to open. The left cabin door (13) and the right cabin door (14) are driven by the left cabin door drive lever (15) and the right cabin door drive lever (16) to flip outward and open. The ramp (6) is driven by the ramp hydraulic lever to flip downward around the ramp axis to the maximum angle. The lower sealing door (2) flips outward and downward around the third axis (c) to ground. The upper sealing door (1) flips outward and upward around the first axis (a) to flatten.

8. The multi-functional rear sealing door for heavy transport aircraft as described in claim 7, characterized in that, The lower sealing door (2) is equipped with a hinged toe plate (9). During the flipping process of the lower sealing door (2), the toe plate (9) unfolds outward around its rotation axis and is grounded together with the sealing door (2).

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