An energy-absorbing structure for eVTOL aircraft seat shoulder harnesses

Abstract

The application discloses an eVTOL aviation seat shoulder strap energy absorption structure and belongs to the technical field of aviation seats. The eVTOL aviation seat shoulder strap energy absorption structure comprises a framework, a chair basin is arranged on the framework, a safety belt is arranged on the chair basin, two energy absorption structures are arranged on the back of the chair basin, the top ends of two shoulder straps of the safety belt are respectively connected with the two energy absorption structures through the chair basin, the energy absorption structure comprises two parallel energy absorption plates, the top end of the shoulder strap of the safety belt is arranged between the two energy absorption plates, a plurality of safety sections are arranged on the side surfaces of the two energy absorption plates, a through groove is arranged on the side surface of each energy absorption plate, a connecting ring is arranged in the through groove, a connecting block is fixed between the outer circumferential surface of the connecting ring and the inner circumferential surface of the through groove, a through hole is arranged on the side surface of the shoulder strap of the safety belt, and a connecting assembly is arranged in the connecting ring and the through hole. The application has the effects of continuously reducing the shoulder strap load of the safety belt in the impact process and protecting the safety of the passengers.

Description

Technical Field

[0001] This invention relates to the technical field of aircraft seats, and in particular to an energy-absorbing structure for the shoulder straps of an eVTOL aircraft seat. Background Technology

[0002] Safety of eVTOL (electric vertical takeoff and landing) aircraft seats and rotorcraft helicopter seats has been enhanced. The tensile load on the seat belt shoulder straps must meet relevant requirements, with the tensile load on a single upper torso restraint strap not exceeding 7.78 kN (1750 lbf). If a dual-strap upper torso restraint is used, the total tensile load must not exceed 8.9 kN (2000 lbf).

[0003] Existing eVTOL electric vertical takeoff and landing aircraft and rotorcraft helicopters all use four-point or five-point seat belts. The shoulder straps of these seat belts are often subjected to large loads, which can cause the load on the shoulder straps to exceed the standard limits, thus causing safety problems for the passengers. Summary of the Invention

[0004] To address the issue that seat belt shoulder straps are often subjected to large loads, which can cause the load to exceed the standard limits and thus pose a safety hazard to passengers, this application provides an eVTOL aircraft seat shoulder strap energy-absorbing structure.

[0005] The energy-absorbing structure for the shoulder strap of an eVTOL aircraft seat provided in this application adopts the following technical solution: An eVTOL aircraft seat shoulder strap energy-absorbing structure includes a frame, a seat basin mounted on the frame, a seat belt mounted on the seat basin, and two energy-absorbing structures on the back of the seat basin. The top ends of the two shoulder straps of the seat belt pass through the seat basin and connect to the two energy-absorbing structures. Each energy-absorbing structure includes two parallel energy-absorbing plates, namely, a first energy-absorbing plate and a second energy-absorbing plate. The top ends of the shoulder straps of the seat belt are positioned between the first and second energy-absorbing plates. The sides of the first and second energy-absorbing plates have multiple safety cross-sections. Each side of the first and second energy-absorbing plates has a through groove. A connecting ring is disposed within the through groove. A connecting block is fixed between the outer circumferential surface of the connecting ring and the inner circumferential surface of the through groove. The side of the shoulder straps of the seat belt has a through hole. A connecting component passes through the connecting ring and the through hole. The seat basin is provided with a fixing component for fixedly connecting to the first and second energy-absorbing plates.

[0006] By adopting the above technical solution, when the aircraft crashes, the seat is subjected to a huge impact load in the horizontal direction. Under the inertial force of the occupant, the seat belt moves forward, causing the shoulder strap of the seat belt to cut off the connecting block first. If there is still energy that has not been completely absorbed, the shoulder strap of the seat belt will continue to move and continue to cut off the subsequent safety section, thereby continuously reducing the shoulder strap load of the seat belt during the impact and protecting the safety of the occupants.

[0007] Preferably, the connecting assembly includes an inner clamping plate and an outer clamping plate disposed on both sides of the first energy-absorbing plate and the second energy-absorbing plate. A connecting post is fixed to the side of the inner clamping plate, and a through hole is provided on the side of the outer clamping plate. The connecting post passes through the connecting ring, the first through hole, and the second through hole in sequence. A nut is fitted on the outer circumferential surface of the connecting post. The nut is threadedly connected to the connecting post and abuts against the outer clamping plate.

[0008] By adopting the above technical solution, the shoulder strap end of the seat belt is firmly clamped and fixed between the energy-absorbing plate one and the energy-absorbing plate two through the threaded locking structure of the inner clamp plate, outer clamp plate, connecting column and nut one. When the aircraft crashes, the seat receives a huge impact load in the horizontal direction. The seat belt moves forward under the inertial force of the passenger, thereby ensuring that the shoulder strap of the seat belt drives the inner clamp plate, outer clamp plate and connecting column to move and shear the safety section.

[0009] Preferably, the fixing component includes multiple screws, multiple through holes 3 are provided on the sides of the first energy-absorbing plate and the second energy-absorbing plate, and multiple through holes 4 are provided on the side of the chair basin. The screws pass through the through holes 4 and the through holes 3 in sequence, and a nut 2 is fitted on the outer peripheral surface of the screws. The screws abut against the first energy-absorbing plate.

[0010] By adopting the above technical solution, the screw is passed through the through hole four and through hole three in sequence, and then the second nut is put on the screw. The second nut is rotated so that the second nut is pressed against the side of the energy-absorbing plate one, thereby fixing the energy-absorbing plate one and the energy-absorbing plate two on the chair basin.

[0011] Preferably, multiple front pads and multiple rear pads are respectively provided on both sides of the energy-absorbing plate two, and the multiple front pads and multiple rear pads correspond to multiple screws respectively, and the screws pass through the rear pads and the front pads.

[0012] By adopting the above technical solution, front pads and rear pads are set on both sides of the second energy-absorbing plate, thereby ensuring that there is enough space between the first energy-absorbing plate and the second energy-absorbing plate to accommodate the shoulder strap and inner clamping plate, and avoiding the possibility of interference between the components.

[0013] Preferably, the multiple through holes on the sides of the first energy-absorbing plate and the second energy-absorbing plate are triangularly distributed along the periphery of the first energy-absorbing plate and the second energy-absorbing plate.

[0014] By adopting the above technical solution, the multiple through holes on the first and second energy-absorbing plates are arranged in a triangular pattern, so that a stable triangular support structure is formed between the three fixed points, which effectively improves the connection stiffness and torsional resistance between the first and second energy-absorbing plates and the chair basin.

[0015] Preferably, the plurality of safety sections on the sides of the first and second energy-absorbing plates are arranged at equal intervals along the vertical direction.

[0016] By adopting the above technical solution, multiple safety sections are set at equal intervals along the vertical direction, so that the shearing process of the safety sections has a uniform time interval. When the shoulder strap moves continuously under impact load, each safety section is sheared in sequence at equal time intervals, thereby achieving smooth and gradual energy absorption.

[0017] Preferably, the frame includes two parallel plate-shaped frames, which are fixedly connected to the chair basin by bolts.

[0018] By adopting the above technical solution, two parallel plate-shaped frames are used as the seat frame, which can provide stable and reliable support for the seat basin. The plate-shaped frames are fixedly connected to the seat basin by bolts, which facilitates the assembly, disassembly and maintenance of the seat.

[0019] Preferably, two support rods are provided between the two plate-shaped frames, the two support rods are arranged crosswise, and the two ends of the two support rods are respectively fixedly connected to the two plate-shaped frames by bolts.

[0020] By adopting the above technical solution, two cross-arranged support rods are set between the two plate-shaped frames, forming a stable triangular or X-shaped support structure between the two plate-shaped frames, which significantly improves the overall torsional stiffness and resistance to lateral impact of the frame.

[0021] Preferably, both the first energy-absorbing plate and the second energy-absorbing plate are provided with a stop portion, which is located at the end of the plurality of safety sections.

[0022] By adopting the above technical solution, a stop is set at the end of multiple safety sections. When all safety sections are cut, the stop can restrict the shoulder strap of the seat belt from continuing to move, thereby preventing the shoulder strap from moving forward further and causing the occupant to move too far forward or causing secondary injury due to the seat belt detaching from the energy-absorbing structure.

[0023] In summary, this application includes at least one of the following beneficial technical effects: 1. When an aircraft crashes, the seat is subjected to a huge impact load in the horizontal direction. Under the inertial force of the occupant, the seat belt moves forward, causing the shoulder strap of the seat belt to shear the first safety section first. If there is still energy that has not been completely absorbed, the shoulder strap of the seat belt will continue to move and continue to shear subsequent safety sections, thereby continuously reducing the load on the shoulder strap of the seat belt during the impact and protecting the safety of the occupants. 2. Through the threaded locking structure of the inner and outer clamping plates, the connecting column, and nut one, the shoulder strap end of the seat belt is firmly clamped and fixed between the energy-absorbing plate one and the energy-absorbing plate two. When the aircraft crashes, the seat receives a huge impact load in the horizontal direction. Under the inertial force of the passenger, the seat belt moves forward, thereby ensuring that the shoulder strap of the seat belt drives the inner clamping plate, the outer clamping plate, and the connecting column to move and shear the safe section. 3. Front and rear pads are installed on both sides of the second energy-absorbing plate to ensure that there is enough space between the first and second energy-absorbing plates to accommodate the shoulder strap and inner clamping plate, thus avoiding the possibility of interference between the components. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the eVTOL aircraft seat shoulder strap energy absorption structure according to an embodiment of this application.

[0025] Figure 2 This is an exploded schematic diagram of the front clamping plate, energy-absorbing plate one, energy-absorbing plate two, and rear clamping plate in the embodiments of this application.

[0026] Reference numerals: 1. Frame; 11. Plate frame; 12. Support rod; 13. Seat basin; 14. Safety belt; 2. Energy-absorbing structure; 21. Energy-absorbing plate one; 22. Energy-absorbing plate two; 23. Safety section; 24. Stop; 3. Inner clamping plate; 31. Outer clamping plate; 32. Connecting column; 33. Nut one; 34. Connecting ring; 35. Through hole one; 36. Through hole two; 37. Through groove; 38. Connecting block; 4. Rear pad block; 41. Front pad block; 42. Through hole three; 43. Through hole four; 44. Screw; 45. Nut two. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0028] This application discloses an energy-absorbing structure for the shoulder strap of an eVTOL aircraft seat.

[0029] Reference Figure 1An eVTOL aircraft seat shoulder strap energy-absorbing structure includes a frame 1, which comprises two parallel plate-shaped frames 11. Two support rods 12 are intersecting between the two plate-shaped frames 11, and the two ends of the two support rods 12 are fixedly connected to the two plate-shaped frames 11 by bolts. A seat basin 13 is fixed to the two plate-shaped frames 11 by bolts, and a seat belt 14 is fixed to the seat basin 13.

[0030] Reference Figure 1 and Figure 2 The back of the seat basin 13 is equipped with two energy-absorbing structures 2. The tops of the two shoulder straps of the safety belt 14 pass through the seat basin 13 and connect to the two energy-absorbing structures 2. The energy-absorbing structure 2 includes two parallel energy-absorbing plates 21 and 22. The tops of the shoulder straps of the safety belt 14 are located between the energy-absorbing plates 21 and 22. The sides of the energy-absorbing plates 21 and 22 are provided with multiple safety sections 23 at equal intervals along the vertical direction. Both the energy-absorbing plates 21 and 22 are provided with stop portions 24, which are located at the ends of the multiple safety sections 23.

[0031] Reference Figure 1 and Figure 2 The energy-absorbing plate 21 and the energy-absorbing plate 22 are respectively provided with an inner clamping plate 3 and an outer clamping plate 31 on both sides. Both energy-absorbing plate 21 and the energy-absorbing plate 22 have through grooves 37 on their sides. A connecting ring 34 is installed in the through groove 37, and a connecting block 38 is fixed between the outer circumferential surface of the connecting ring 34 and the inner circumferential surface of the through groove 37. The shoulder strap of the safety belt 14 has a through hole 35 on its side, and the outer clamping plate 31 has a through hole 36 on its side. A connecting post 32 is fixed to the side of the inner clamping plate 3. The connecting post 32 passes through the connecting ring 34, through hole 35, and through hole 36 in sequence. A nut 33 is fitted onto the outer circumferential surface of the connecting post 32, and the nut 33 is threadedly connected to the connecting post 32.

[0032] The connecting post 32 on the inner clamping plate 3 is passed sequentially through the connecting ring 34 on the side of the energy-absorbing plate 22, the through hole 35 on the side of the shoulder strap of the safety belt 14, the connecting ring 34 on the side of the energy-absorbing plate 21, and the through hole 36 on the side of the outer clamping plate 31. Then, the nut 33 is fitted onto the outer circumference of the connecting post 32. The nut 33 is rotated so that it moves towards the clamping plate and presses against the side of the outer clamping plate 31, thereby fixing the shoulder strap end of the safety belt 14 between the energy-absorbing plate 21 and the energy-absorbing plate 22.

[0033] Reference Figure 1 and Figure 2Multiple front pads 41 and multiple rear pads 4 are respectively provided on both sides of the energy-absorbing plate 22. The two sides of the front pads 41 abut against the opposite sides of the energy-absorbing plate 21 and the energy-absorbing plate 22, respectively. The two sides of the rear pads 4 abut against the opposite sides of the energy-absorbing plate 22 and the chair basin 13, respectively. Multiple through holes 42 are provided on the sides of both the energy-absorbing plate 21 and the energy-absorbing plate 22. The multiple through holes 42 on the sides of the energy-absorbing plate 21 and the energy-absorbing plate 22 are triangularly distributed along the periphery of the energy-absorbing plate 21 and the energy-absorbing plate 22, and the multiple through holes 42 correspond to the multiple front pads 41. Multiple through holes 43 are provided on the sides of the chair basin 13, and the multiple through holes 43 correspond to the multiple through holes 42. A screw 44 is inserted into the through hole 43. The screw 44 passes through the rear pad 4, the through hole 42 on the energy-absorbing plate 22, the front pad 41, and the through hole 42 on the energy-absorbing plate 11 in sequence. A nut 2 45 is fitted on the outer circumference of the screw 44. The screw 44 abuts against the energy-absorbing plate 11.

[0034] Screw 44 is passed through the chair basin 13, rear pad 4, energy-absorbing plate 22, front pad 41 and energy-absorbing plate 21 in sequence. Then, nut 25 is put on screw 44 and rotated so that the side of nut 245 abuts against the side of energy-absorbing plate 21, thereby fixing energy-absorbing plate 21 and energy-absorbing plate 22 to the chair basin 13.

[0035] The implementation principle of the eVTOL aircraft seat shoulder strap energy absorption structure in this application embodiment is as follows: the end of the shoulder strap of the seat belt 14 is placed between the first energy absorption plate 21 and the second energy absorption plate 22, and then the front pad 41 is placed between the first energy absorption plate 21 and the second energy absorption plate 22, so that the front pad 41 is aligned with the third through hole 42 on the first energy absorption plate 21. Then the connecting post 32 on the inner clamping plate 3 passes through the connecting ring 34 on the side of the second energy absorption plate 22, the first through hole 35 on the side of the shoulder strap of the seat belt 14, and the connecting ring 34 on the side of the first energy absorption plate 21 in sequence. Then the outer clamping plate 31 is sleeved on the connecting post 32 through the second through hole 36. Then the first nut 33 is sleeved on the outer circumferential surface of the connecting post 32. Rotate the first nut 33 so that the first nut 33 moves toward the clamping plate and presses against the side of the outer clamping plate 31, thus fixing the end of the shoulder strap of the seat belt 14 between the first energy absorption plate 21 and the second energy absorption plate 22. Then place the rear pad 4 between the energy-absorbing plate 22 and the chair basin 13, aligning the rear pad 4 with the through hole 3 42 on the energy-absorbing plate 22 and the through hole 43 on the chair basin 13. Then pass the screw 44 through the chair basin 13, the rear pad 4, the energy-absorbing plate 22, the front pad 41 and the energy-absorbing plate 1 21 in sequence. Then put the nut 2 45 on the screw 44 and rotate the nut 2 45 so that the side of the nut 2 45 abuts against the side of the energy-absorbing plate 1 21, thereby fixing the energy-absorbing plate 1 21 and the energy-absorbing plate 22 to the chair basin 13.

[0036] When the occupants are seated in the seat basin 13 and fastened with seat belts 14, the horizontal direction of the seat is subjected to a huge impact load when the aircraft crashes. Under the action of inertial force, the occupants move forward, causing the seat belts 14 to move. The shoulder straps of the seat belts 14 then move the outer clamp 31 and inner clamp 3 upward, causing the connecting ring 34 to move. This causes the outer clamp 31 and inner clamp 3 to shear the connecting block 38 first. If there is still energy that has not been completely absorbed, the shoulder straps of the seat belts 14 will continue to move, continuing to drive the outer clamp 31 and inner clamp 3 to shear the subsequent safety section 23, thereby continuously reducing the shoulder strap load of the seat belts 14 during the impact, and thus protecting the safety of the occupants.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An eVTOL aircraft seat shoulder strap energy-absorbing structure, comprising a frame (1), a seat basin (13) disposed on the frame (1), and a seat belt (14) disposed on the seat basin (13), characterized in that: The back of the chair basin (13) is provided with two energy-absorbing structures (2). The top ends of the two shoulder straps of the safety belt (14) pass through the chair basin (13) and are connected to the two energy-absorbing structures (2). The energy-absorbing structure (2) includes two parallel energy-absorbing plates, namely, a first energy-absorbing plate (21) and a second energy-absorbing plate (22). The top ends of the shoulder straps of the safety belt (14) are located between the first energy-absorbing plate (21) and the second energy-absorbing plate (22). The sides of the first energy-absorbing plate (21) and the second energy-absorbing plate (22) are provided with multiple safety sections (23). Both the first (21) and the second (22) of the energy-absorbing plate are provided with through grooves (37). A connecting ring (34) is provided in the through groove (37). A connecting block (38) is fixed between the outer circumferential surface of the connecting ring (34) and the inner circumferential surface of the through groove (37). A through hole (35) is provided on the side of the shoulder strap of the safety belt (14). A connecting component is passed through the connecting ring (34) and the through hole (35). A fixing component is provided on the chair basin (13) for fixed connection with the first (21) and the second (22) of the energy-absorbing plate.

2. The eVTOL aircraft seat shoulder strap energy absorption structure according to claim 1, characterized in that: The connecting assembly includes an inner clamping plate (3) and an outer clamping plate (31) disposed on both sides of the first energy-absorbing plate (21) and the second energy-absorbing plate (22). A connecting post (32) is fixed on the side of the inner clamping plate (3), and a through hole (36) is opened on the side of the outer clamping plate (31). The connecting post (32) passes through the connecting ring (34), the first through hole (35) and the second through hole (36) in sequence. A nut (33) is fitted on the outer circumferential surface of the connecting post (32). The nut (33) is threadedly connected to the connecting post (32), and the nut (33) abuts against the outer clamping plate (31).

3. The energy-absorbing structure for the shoulder strap of an eVTOL aircraft seat according to claim 1, characterized in that: The fixing component includes multiple screws (44), and multiple through holes (42) are provided on the sides of the first energy-absorbing plate (21) and the second energy-absorbing plate (22). Multiple through holes (43) are provided on the side of the chair basin (13). The screws (44) pass through the through holes (43) and the through holes (42) in sequence. Nuts (45) are fitted on the outer circumferential surface of the screws (44). The screws (44) abut against the first energy-absorbing plate (21).

4. The eVTOL aircraft seat shoulder strap energy absorption structure according to claim 3, characterized in that: The energy-absorbing plate 2 (22) has multiple front pads (41) and multiple rear pads (4) on both sides respectively. The multiple front pads (41) and the multiple rear pads (4) correspond to multiple screws (44) respectively. The screws (44) pass through the rear pads (4) and the front pads (41).

5. The eVTOL aircraft seat shoulder strap energy absorption structure according to claim 4, characterized in that: The multiple through holes 3 (42) on the sides of the first energy-absorbing plate (21) and the second energy-absorbing plate (22) are triangularly distributed along the periphery of the first energy-absorbing plate (21) and the second energy-absorbing plate (22).

6. The eVTOL aircraft seat shoulder strap energy absorption structure according to claim 1, characterized in that: The multiple safety sections (23) on the sides of the first energy-absorbing plate (21) and the second energy-absorbing plate (22) are respectively arranged at equal intervals along the vertical direction.

7. The eVTOL aircraft seat shoulder strap energy absorption structure according to claim 1, characterized in that: The frame (1) includes two parallel plate frames (11), which are fixedly connected to the chair basin (13) by bolts.

8. The energy-absorbing structure for an eVTOL aircraft seat shoulder strap according to claim 7, characterized in that: Two support rods (12) are provided between the two plate-shaped frames (11), and the two support rods (12) are arranged crosswise. The two ends of the two support rods (12) are fixedly connected to the two plate-shaped frames (11) by bolts respectively.

9. The eVTOL aircraft seat shoulder strap energy absorption structure according to claim 1, characterized in that: Both the first energy-absorbing plate (21) and the second energy-absorbing plate (22) are provided with a stop (24), which is located at the end of the plurality of safety sections (23).

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