Extensible abdomen device

Abstract

The invention belongs to the technical field of aviation, and relates to an aircraft belly telescopic device. Comprising an airtight cabin structure assembly and a telescopic device assembly. Various devices are loaded through the belly telescopic device unit, and the device can flexibly move out of and into a cabin to complete different tasks, so that the airplane has the capabilities of shape preservation, pneumatic resistance reduction and invisibility, the comprehensive performance of the airplane is improved, and the use requirements of airborne and systems are met. The device is reasonable in arrangement and has good manufacturability and maintainability.

Description

Technical Field

[0001] The invention belongs to the field of aviation technology and relates to a retractable device at the belly of an aircraft. Background Art

[0002] Most of the systems are fixed on the fuselage structure. With the different requirements for the use of modern systems and the need for development, some systems are required to have the function of telescopic movement inside and outside the cabin according to the needs of use, so that the aircraft has the ability to maintain shape, reduce aerodynamic drag, and be stealth, thereby improving the overall performance of the aircraft. Summary of the invention

[0003] Purpose of the invention: To provide a retractable belly device to solve the inherent fixed installation form of the system, so that the aircraft has the ability of shape preservation, aerodynamic drag reduction, and stealth, improve the comprehensive performance of the aircraft, and meet the requirements of airborne and system use.

[0004] Technical solution:

[0005] A retractable device on the belly of an aircraft comprises: an airtight cabin structure component and a retractable device component, wherein the airtight cabin structure component is an independent airtight space in an aircraft cabin, and a retractable device component is arranged in the airtight space, and the retractable device component comprises: a retractable device 14, a rack component 15, a motor 16, a motion control board 17, and a cabin door motion mechanism 18, wherein the motor 16 is connected to the aircraft floor with bolts, the rack component 15 is arranged on the inner surface of the airtight cabin structure, one end of the rack component 15 is connected to the retractable device 14, and the other end of the rack component 15 is connected to the output end of the motor 16; the motion control board 17 controls the motor 16 to drive the rack component 15 and the cabin door motion mechanism 18 to move, so as to drive the retractable device 14 to move out of the cabin and back into the cabin, and ensure the coordinated movement of the motion cabin door 11 and the retractable device 14;

[0006] The door movement mechanism 18 is arranged at the front and rear ends of the inner surface of the airtight cabin, and is used to drive the moving door 11. After the moving door 11 is closed in place, the fixed door is closed by the lock; the lock is unlocked, and the door movement mechanism 18 drives the moving door 11 to open the door.

[0007] Furthermore, the moving door 11 is in an airtight state when closed and conforms to the outer shape of the aircraft skin.

[0008] Furthermore, a hinged cover 12 and quick-release screws 13 are designed on the rear side above the floor along the course, and the hinged cover 12 is used for replacement, filling and maintenance of the telescopic device 14 in the cabin.

[0009] Furthermore, there are at least two airtight cabin structural components and they are symmetrically distributed.

[0010] Furthermore, the moving door 11 is made of composite materials and is hung on the lower side of the airtight cabin with hinges and bolts. The moving door 11 has two working states: closed and opened. The maximum angle of the open state is f°, which ensures that the telescopic device 14 can enter and exit the cabin.

[0011] Furthermore, the airtight space includes: an airtight cabin skin 1, columns 2, columns 3, horizontal profiles 4, short horizontal profiles 5, lower end profiles 6, lower end profiles 7, columns 8, columns 9, and profiles 10 for connecting the outside of the airtight cabin with the crossbeam, wherein the airtight cabin skin 1 includes five surfaces: front, back, left, right and top, and the columns 2, columns 3, horizontal profiles 4, short horizontal profiles 5, lower end profiles 6, lower end profiles 7, columns 8, and columns 9 are reinforcing structures, and the airtight space is connected to the aircraft crossbeam through the profile 10 for connecting the outside of the airtight cabin with the crossbeam.

[0012] Furthermore, the profile 10 that connects the outer side of the airtight cabin to the crossbeam is an I-shaped profile, which is connected to the floor crossbeam or the like through a joint, rivets or bolts.

[0013] Furthermore, the material of the airtight cabin skin 1 and the hinged cover 12 is LY12-CZ-δ1.5.

[0014] Beneficial effects:

[0015] The present invention provides a retractable device on the belly of an aircraft. Different system units are arranged in the aircraft cabin first, and according to different usage scenarios of the system units, during flight, different system units are controlled by a retractable control system to move outside the cabin for work. After use, the different system units are controlled by the retractable control system to be fixed inside the cabin to complete the task. The retractable device unit on the belly of the aircraft can be loaded with various equipment. According to the usage requirements of different systems, the inherent fixed installation form of the system is improved and solved, so that the system has the flexibility of retractable movement inside and outside the cabin, so that the aircraft has the ability of conformal, aerodynamic drag reduction, and stealth, and improves the comprehensive performance of the aircraft, which meets the requirements of airborne and system use. It has a reasonable layout and good processability and maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the layout of a belly-retractable device cabin;

[0017] Figure 2 It is AA view;

[0018] Figure 3 It is a schematic diagram of direction B;

[0019] Figure 4 It is a schematic diagram of the C direction;

[0020] Figure 5 It is a schematic diagram of D direction;

[0021] Figure 6 This is the airtight line view.

[0022] Among them: 1. Airtight cabin skin (5 pieces in total, including the front, back, left and right top); 2. Airtight cabin inner pillars (2 pieces in total); 3. Airtight cabin inner pillars (2 pieces in total); 4. Airtight cabin inner horizontal profiles (2 pieces in total); 5. Airtight cabin inner short horizontal profiles (2 pieces in total); 6. Airtight cabin lower end profile (1 piece); 7. Airtight cabin lower end profile (1 piece); 8. Airtight cabin outer side pillars (7 pieces); 9. Airtight cabin outer side pillars (7 pieces); 10. Airtight cabin outer side and crossbeam docking profile (2 pieces); 11. Motion cabin door (1 piece); 12. Hinge cover (1 piece); 13. Quick release screws (3 pieces); 14. Telescopic device (1 piece); 15. Rack assembly (4 pieces); 16. Electric motor (1 piece); 17. Motion control board (1 piece); 18. Cabin door movement mechanism (2 sets). There are two airtight cabins in the cabin of the present invention, and the above number of pieces is the number of pieces of a single set of airtight cabins. DETAILED DESCRIPTION

[0023] The present invention provides a retractable device on the belly of an aircraft. Different system units are arranged in the aircraft cabin first, and according to different usage scenarios of the system units, during flight, different system units are controlled by a retractable control system to move outside the cabin for work. After use, the different system units are controlled by the retractable control system to be fixed in the cabin to complete the task. The retractable device unit on the belly of the aircraft can be loaded with various equipment. According to the use requirements of different systems, the present invention improves and solves the inherent fixed installation form of the system, and provides a retractable installation form, so that the aircraft has the ability of conformal, aerodynamic drag reduction, and stealth, thereby improving the comprehensive performance of the aircraft and meeting the use requirements of the airborne system.

[0024] like Figures 1 to 6 As shown, a retractable device on the belly mainly includes: airtight cabin skin (5 pieces in total, including the front, rear, left, and right top of the appearance) 1, airtight cabin inner column (2 pieces in total) 2, airtight cabin inner column (2 pieces in total) 3, airtight cabin inner horizontal profile (2 pieces in total) 4, airtight cabin inner short horizontal profile (2 pieces in total) 5, airtight cabin lower end profile (1 piece) 6, airtight cabin lower end profile (1 piece) 7, airtight cabin outer side column (7 pieces) 8, airtight cabin outer side column (7 pieces) 9, airtight cabin outer side and crossbeam docking profile 10 (2 pieces), moving cabin door (1 piece) 11, hinge cover (1 piece) 12, quick release screws (3 pieces) 13, telescopic device (1 piece) 14, rack assembly (4 pieces) 15, motor (1 piece) 16, motion control board (1 piece) 17, cabin door motion mechanism (2 sets) 18. There are two airtight cabins in the cabin of the present invention, and the above number of pieces is the number of pieces of a single set of airtight cabins.

[0025] In general, a retractable belly device mainly includes two parts: an airtight cabin structure component and a retractable device component.

[0026] Airtight cabin structural component design. The airtight cabin structural components are mainly composed of airtight cabin skin (5 pieces in total, including the front, back, left and right top) 1, airtight cabin inner column (2 pieces in total) 2, airtight cabin inner column (2 pieces in total) 3, airtight cabin inner horizontal profile (2 pieces in total) 4, airtight cabin inner short horizontal profile (2 pieces in total) 5, airtight cabin inner lower end profile (1 piece) 6, airtight cabin inner lower end profile (1 piece) 7, airtight cabin outer column (7 pieces) 8, airtight cabin outer column (7 pieces) 9, airtight cabin outer side and crossbeam docking profile 10 (2 pieces), moving cabin door (1 piece) 11, hinged cover (1 piece) 12, quick release screws (3 pieces) 13. The material of airtight cabin skin 1 and hinged cover 12 is LY12-CZ-δ1.5. The column 2 in the airtight cabin, the column 3 in the airtight cabin, the horizontal profile 4 in the airtight cabin, the short horizontal profile 5 in the airtight cabin, the column 8 outside the airtight cabin, and the column 9 outside the airtight cabin are made of right-angle profiles and are connected to the surrounding structural parts such as the skin 1 with rivets or bolts. The lower end profile 6 in the airtight cabin and the lower end profile 7 in the airtight cabin are integral aluminum alloy pre-stretched plate machine parts, which are connected to the surrounding structural parts such as the skin 1 with bolts. The crossbeam docking profile 10 is an I-shaped profile, which is connected to the floor crossbeam, etc. through a joint, rivets or bolts. The moving cabin door 11 is a composite material and is hung on the lower side of the outside of the airtight cabin with hinges and bolts. The moving cabin door 11 has two working states: closed and opened. The maximum angle of the open state is f°, which ensures that the telescopic device 14 can enter and exit the cabin. The closed working state is an airtight state, which is conformal to the shape of the aircraft skin. A hinged cover 12 and quick-release screws 13 are designed on the rear side above the floor in the direction of the course. The hinged cover 12 is used for the replacement, loading and maintenance of the telescopic device 14 in the cabin. Unscrew the three quick-release screws 13, and the hinged cover 12 is flipped down on the floor to reveal the replacement and maintenance passage. Tighten the quick-release screws 13 to ensure the airtightness of the airtight cabin. The airtight cabin structural components are designed to form an independent airtight space. The size of the airtight cabin is a×b×cmm (length×width×height), see Figure 1 , AA section, B view, C view, D view.

[0027] The airtight cabin structural components are designed to form two independent airtight spaces in the aircraft cabin. Two sets of belly retractable devices are arranged symmetrically and independently. The positioning size of the airtight cabin structural components is Gmm. The two airtight cabin structural components are arranged to form three channels, and the channel width dimensions are "Hmm" and "Jmm" respectively to ensure normal passage in the cabin. Figure 6 .

[0028] Design of telescopic device assembly. The telescopic device assembly is mainly composed of a telescopic device 14, a rack assembly 15, a motor 16, a motion control board 17, and a door motion mechanism (2 sets) 18. The telescopic device 14 can be loaded with various equipment to complete different tasks. The telescopic device 14 is divided into three working states: ① the state of changing, loading and maintaining the channel on the floor; ② the state of waiting to leave the cabin; ③ the state of leaving the cabin. ① The positioning size of the state of changing, loading and maintaining the channel on the floor is dmm (above the floor); ③ The maximum size of the state of leaving the cabin is emm. The rack assembly 15, the motor 16, the motion control board 17, and the door motion mechanism 18 constitute the motion device of the telescopic device 14. The motor 16 is connected to the aircraft floor with bolts for easy maintenance. The rack assembly 15 is 4 steel parts, arranged on the inner surface of the airtight cabin structure, and is connected to the skin 1, the airtight cabin outer column 8, and the airtight cabin outer column 9 with bolts. It is one of the driving devices of the telescopic device 14. The motion control board 17 is a driving command control unit of the telescopic device 14, which ensures the telescopic device 14 can exit and return to the cabin. The motion control board 17 controls the motor 16, drives the rack assembly 15 and the cabin door motion mechanism 18 to move, so as to drive the telescopic device 14 to exit and return to the cabin, and ensures the coordinated movement of the motion cabin door 11 and the telescopic device 14.

[0029] The door movement mechanism (2 sets) 18 is designed. The 2 sets of door movement mechanisms 18 are arranged at the front and rear ends of the inner surface of the airtight cabin to drive the moving cabin door 11. After 11 is closed in place, the fixed cabin door is closed by 4 locks; the 4 locks are unlocked, and the door movement mechanism 18 drives 11 to open the cabin door. The 4 locks close the fixed cabin door to ensure the airtightness of the moving cabin door 11 and ensure the safety of the aircraft.

[0030] In order to ensure the normal operation of the telescopic device assembly, various cables and accessories are arranged on the inner surface of the upper end of the airtight cabin structure.

Claims

1. A retractable belly device, characterized in that: include: Airtight cabin structural components, telescopic device components, wherein: The airtight cabin structure component is an independent airtight space in the aircraft cabin, and a telescopic device component is arranged in the airtight space. The telescopic device component comprises: a telescopic device (14), a rack component (15), a motor (16), a motion control board (17), and a cabin door motion mechanism (18), wherein the motor (16) is connected to the aircraft floor with bolts, the rack component (15) is arranged on the inner surface of the airtight cabin structure, one end of the rack component (15) is connected to the telescopic device (14), and the other end of the rack component (15) is connected to the output end of the motor (16); the motion control board (17) controls the motor (16) to drive the rack component (15) and the cabin door motion mechanism (18) to move, so as to drive the telescopic device (14) to move out of the cabin and back into the cabin, thereby ensuring the coordinated movement of the moving cabin door (11) and the telescopic device (14); The door movement mechanism (18) is arranged at the front and rear ends of the inner surface of the airtight cabin and is used to drive the moving door (11). After the moving door (11) is fully closed, the fixed door is closed by a lock; when the lock is unlocked, the door movement mechanism (18) drives the moving door (11) to open the door.

2. The belly-retractable device according to claim 1, characterized in that: The moving door (11) is in an airtight state when in a closed working state and conforms to the outer shape of the aircraft skin.

3. The belly-retractable device according to claim 1, characterized in that: A hinged cover (12) and a quick-release screw (13) are designed on the rear side above the floor in the same direction of the course. The hinged cover (12) is used for the replacement, filling and maintenance of the telescopic device (14) in the cabin.

4. The belly-retractable device according to claim 1, characterized in that: There are at least two airtight cabin structural components which are symmetrically distributed.

5. The belly-retractable device according to claim 1, characterized in that: The moving door (11) is made of composite material and is hung on the lower side of the airtight cabin by hinges and bolts. The moving door (11) has two working states: closed and open. The maximum angle f° in the open state ensures that the telescopic device (14) can enter and exit the cabin.

6. The belly-retractable device according to claim 1, characterized in that: The airtight space comprises: an airtight cabin skin (1), an airtight cabin inner column (2), an airtight cabin inner column (3), an airtight cabin inner horizontal profile (4), an airtight cabin inner short horizontal profile (5), an airtight cabin inner lower end profile (6), an airtight cabin inner lower end profile (7), an airtight cabin outer side column (8), an airtight cabin outer side column (9), and an airtight cabin outer side cross beam butting profile (10), wherein the airtight cabin skin (1) comprises five surfaces of front, back, left, right and top, the airtight cabin inner column (2), the airtight cabin inner column (3), the airtight cabin inner horizontal profile (4), the airtight cabin inner short horizontal profile (5), the airtight cabin inner lower end profile (6), the airtight cabin inner lower end profile (7), the airtight cabin outer side column (8), and the airtight cabin outer side column (9) are reinforcement structures, and the airtight space is connected to the aircraft cross beam through the airtight cabin outer side cross beam butting profile (10).

7. The belly-retractable device according to claim 1, characterized in that: The profile (10) that connects the outer side of the airtight cabin to the crossbeam is an I-shaped profile, which is connected to the floor crossbeam etc. through a joint, rivets or bolts.

8. The belly-retractable device according to claim 1, characterized in that: The materials of the airtight cabin skin (1) and the hinged cover (12) are LY12-CZ-δ1.5.

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