Buffer airbag and aircraft
By designing a flexible support membrane and sealing components, the problems of excessive weight and inconvenient storage of the cushioning airbag are solved, achieving lightweight and efficient cushioning control, which is suitable for aerospace and other fields.
Patent Information
- Application Number
- CN202520444205.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-13
AI Technical Summary
The existing airbag vent structure uses metal flanges and bolts for rigid fixation, resulting in excessive weight, which makes it difficult to meet the lightweight requirements of aerospace and other fields. Furthermore, it occupies space when folded and stored, affecting the compactness of the airbag and the flexibility of equipment layout.
The flexible support membrane and seals are fixed to the airbag body by flexible fasteners. The burst line breaks when the internal pressure reaches the set value, so as to achieve flexible sealing and pressure relief of the exhaust port. This avoids rigid connection, reduces the overall structural weight, and has no hard protrusions when stored.
It achieves lightweight cushioning airbags, improves space utilization, avoids the risks of metal corrosion and bolt loosening, is suitable for extreme environments, and provides high reliability and adaptive cushioning control.
Smart Images
Figure CN223905308U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of aviation technology, in particular to a buffer airbag and an aircraft. BACKGROUND
[0002] In the scene of high-speed crash or severe impact, the buffer airbag needs to achieve overload energy absorption through precise exhaust control, and the design of the exhaust hole structure directly affects the buffering performance and reliability.
[0003] In related technologies, the exhaust hole of the crash buffer airbag usually adopts a rigid fixed structure composed of a metal flange and a bolt. When the airbag inflates to reach the preset internal pressure, the burst membrane breaks, the exhaust hole opens to release pressure to adjust the buffering rate. Although this scheme can meet the basic functional requirements, its structure design has significant limitations in actual application. First, the rigid connection of the metal flange and the bolt results in excessive weight of the exhaust hole assembly. Especially in the fields of aviation, aerospace, special vehicles and the like which are sensitive to weight, such structure is difficult to meet the lightweight requirement. Second, the rigid structure cannot be folded in coordination with the flexible main body of the airbag, resulting in a hard protrusion in the exhaust hole area when stowed, occupying redundant space, affecting the compactness of the airbag and the flexibility of equipment layout.
[0004] Therefore, the crash buffer airbag in related technologies is difficult to meet the lightweight requirement and is not convenient to fold and store. CONTENT OF THE INVENTION
[0005] To solve or partially solve the problems in related technologies, the present application provides a buffer airbag and an aircraft, which can reduce the structural weight of the buffer airbag and better adapt to the lightweight requirement in the fields of aviation, aerospace and the like.
[0006] The first aspect of the present application provides a buffer airbag, comprising an airbag main body and an exhaust assembly, the airbag main body is provided with an exhaust hole, and the exhaust assembly is arranged at the exhaust hole;
[0007] The exhaust assembly comprises a support membrane, a sealing member and a fixing member, the support membrane is fixed to the airbag main body by the fixing member, and the sealing member is used to seal the connection area between the support membrane and the airbag main body.
[0008] When the internal pressure of the airbag does not reach the set value, the support membrane is fixed to the airbag main body by the tension of the fixing member; when the internal pressure of the airbag reaches the set value, the fixing member is broken under the action of the internal pressure, and the support membrane is separated from the airbag main body to release the pressure of the buffer airbag.
[0009] In one embodiment, the fixing member is a burst line, and the support film is sewn to the airbag body by the burst line; when the airbag pressure reaches a set value, the burst line is broken by the airbag pressure, so that the support film is separated from the airbag body.
[0010] In one embodiment, the sealing member is a sealing film that is sealingly connected to the airbag body, and the sealing film covers at least the sewing area of the burst line on the inner surface of the airbag body.
[0011] In one embodiment, the sealing member is a sealing glue that is coated on the burst line sewing area between the airbag body and the support film, fills the gap between the stitches to seal the exhaust hole.
[0012] In one embodiment, the burst line is a high-strength fracture line that can be broken, and at least one of the sewing method, stitch strength, and stitch pitch of the burst line is associated with the set value of the airbag pressure.
[0013] In one embodiment, the sealing film covers the exhaust hole, the edge of the sealing film is seamlessly connected to the inner surface of the airbag body, and the coverage area of the edge of the sealing film is greater than the area of the exhaust hole area.
[0014] In one embodiment, the sealing glue is filled in the gap between the stitch holes in the burst line sewing area, forms an airtight layer after curing, and is separated from the airbag body along with the residual segment of the burst line after the support film falls off.
[0015] In one embodiment, the support film covers the exhaust hole on the outer surface of the airbag body; the edge of the support film is sewn to the airbag body by the burst line, and the middle area of the support film is suspended to cover the exhaust hole.
[0016] The stitch path of the burst line is annular, and the stitch path is located in the overlapping area of the support film and the airbag body.
[0017] In one embodiment, the fixing member, the sealing member, and the support film are made of flexible materials. The second aspect of the present application provides an aircraft, including a fuselage, the fuselage is provided with an airbag assembly, and the airbag assembly includes the buffer airbag of the first aspect.
[0018] The technical solutions provided by the present application can include the following beneficial effects:
[0019] The buffer air bag provided in the application, the exhaust assembly adopts a flexible fixing member to fix the supporting film and the air bag body, and seals the exhaust hole area through a sealing member, which not only has a simple structure, but also avoids the rigid connection of the metal flange and the bolt in the related art, eliminates the hard components, reduces the overall structure weight, and better adapts to the demand for light weight in the field of aerospace and the like.
[0020] Further, in the application, the air bag body and the exhaust assembly are both made of flexible materials, which can deform with the air bag when being folded for storage, facilitating the folding and storage of the air bag, and having no hard protrusions after being stored, thereby improving the space utilization rate. Moreover, the metal corrosion and bolt loosening hidden troubles caused by the metal components in the related art can be avoided.
[0021] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS
[0022] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the several views, and in which exemplary embodiments of the present application are shown.
[0023] Figure 1 is an exploded view of the buffer air bag according to an embodiment of the application;
[0024] Figure 2 is a structural schematic view of the exhaust hole of the buffer air bag according to an embodiment of the application;
[0025] Figure 3 is Figure 2 is a sectional view along A-A;
[0026] Figure 4 is a structural schematic view of the exhaust hole of the buffer air bag according to another embodiment of the application;
[0027] Figure 5 is Figure 3 is a sectional view along B-B;
[0028] Figure 6 is a schematic view of the cooperation between the aircraft and the buffer air bag according to an embodiment of the application.
[0029] Reference signs: 100, air bag body; 110, exhaust hole; 200, exhaust assembly; 210, sealing film; 220, supporting film; 230, flexible fixing member; 240, sealing glue; 300, fuselage. DETAILED DESCRIPTION
[0030] The preferred embodiments of the present application will be described herein below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
[0031] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or", as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0032] It should be understood that, although the terms "first", "second", "third", etc. can be employed in this application to describe various information, such information should not be limited by these terms. These terms are only used to distinguish one piece of information from another. For example, a first information can also be referred to as a second information, and similarly, a second information can also be referred to as a first information, without departing from the scope of the present application. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.
[0033] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.
[0034] Unless otherwise clearly specified and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0035] In the related art, the exhaust hole of the crash cushion airbag usually adopts a rigid fixing structure composed of a metal flange and a bolt. The rigid connection of the metal flange and the bolt leads to an excessively large weight of the exhaust hole assembly. Especially in the fields of aviation, aerospace, special vehicles and the like which are sensitive to weight, such a structure is difficult to meet the lightweight requirement. In addition, the rigid structure cannot be coordinated with the flexible main body of the airbag to fold, resulting in a hard protrusion formed in the exhaust hole area when stored, occupying redundant space, and affecting the compactness of the airbag and the flexibility of equipment layout.
[0036] To solve the above problems, the embodiments of the present application provide a buffer airbag and an aircraft, which can reduce the structural weight of the buffer airbag and better adapt to the lightweight requirement in the field of aviation, aerospace and the like.
[0037] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings.
[0038] Figure 1 is an exploded view of the buffer airbag according to an embodiment of the present application.
[0039] Referring to Figure 1 , the present application provides a buffer airbag, which comprises an airbag main body 100 and an exhaust assembly 200, the airbag main body 100 is provided with an exhaust hole 110, and the exhaust assembly 200 is arranged at the exhaust hole 110.
[0040] The exhaust assembly 200 comprises a support film 220, a sealing member and a flexible fixing member 230. The support film 220 is fixed to the airbag main body 100 through the flexible fixing member 230, and the sealing member is used to seal the connection area of the support film 220 and the airbag main body 100. When the internal pressure of the airbag does not reach a set value, the support film 220 is fixed to the airbag main body 100 through the tension of the flexible fixing member 230. When the internal pressure of the airbag reaches the set value, the flexible fixing member 230 is broken under the action of the internal pressure, and the support film 220 is separated from the airbag main body 100 to release the pressure of the buffer airbag.
[0041] The buffer airbag provided by the present application adopts the flexible fixing member 230 to fix the support film 220 to the airbag main body 100, and seals the exhaust hole 110 area through the sealing member. The structure is simple, the rigid connection of the metal flange and the bolt in the related art is avoided, the hard components are eliminated, the overall structural weight is reduced, and the lightweight requirement in the field of aviation, aerospace and the like can be better adapted.
[0042] In the present application, the airbag body 100, the supporting film 220 and the sealing member are all made of flexible materials, which can deform with the airbag when folded for storage, facilitating the folding and storage of the airbag, and avoiding hard protrusions after storage, thereby improving the space utilization. Moreover, the buffer airbag and the exhaust assembly 200 of the present application are fully flexible structures without metal components, avoiding the hidden dangers such as metal rust and bolt loosening in the background art, tolerating extreme temperature (-50℃~120℃) and high frequency vibration environment, and being particularly suitable for aircraft crash scenarios. The supporting film 220 and the sealing member are completely separated from the airbag body 100 after pressure relief, without residual hard fragments, avoiding interference caused by secondary contraction or repeated use of the airbag.
[0043] In some embodiments, the airbag body 100 can be made of flexible composite materials (such as silicone-coated polyamide fabric), in a circular multi-layer concentric circle structure, with a circular exhaust hole 110 in the center area, and the supporting film 220 covering the exhaust hole 110 on the outer surface of the airbag body 100.
[0044] Figure 2 is a structural schematic diagram of the exhaust hole of the buffer airbag according to an embodiment of the present application; Figure 3 is Figure 2 is a sectional view along A-A.
[0045] Referring to Figure 2 and Figure 3 In some embodiments, the sealing member is a sealing film 210 sealingly connected with the airbag body 100, and the sealing film 210 covers at least the sewing area of the burst line on the inner surface of the airbag body 100. The edge of the supporting film 220 is connected with the airbag body 100 by sewing through the burst line, and the middle area of the supporting film 220 is suspended and covers the exhaust hole 110.
[0046] During the pressure rise in the airbag, the sealing film 210 plays a sealing role to prevent gas leakage from the exhaust hole 110 and the sewing position; during the pressure rise in the airbag, the supporting film 220 plays a role of supporting the sealing film 210 to prevent the sealing film 210 from being broken when the internal pressure of the airbag does not reach the set value. Moreover, the supporting film 220 and the sealing assembly form a redundant sealing structure, and when the internal pressure of the airbag does not reach the threshold value, the supporting film 220 offsets the peeling force of the internal pressure on the sealing assembly through the sewing tension, ensuring double airtightness.
[0047] The sealing film 210 can be attached to the inner surface of the airbag body 100 by welding or gluing process, covering the exhaust hole 110 area and forming a seal between the airbag body 100, avoiding gas leakage from the sewing position. Using conventional sewing and gluing process, without complex metal processing equipment, the production cost is reduced by more than 50% compared with the traditional scheme, and it is easy to mass produce.
[0048] In some embodiments, the sealing film 210 can be a thermoplastic polyurethane (TPU) film, which is seamlessly attached to the inner surface of the airbag body 100 by hot melt welding to cover the area of the exhaust hole 110. When the internal pressure does not reach the threshold value, the tension of the supporting film 220 offsets the peeling force of the internal pressure on the sealing film 210, preventing the sealing film 210 from breaking prematurely.
[0049] The sealing film 210 covers the exhaust hole 110, and the edges of the sealing film 210 are seamlessly connected to the inner surface of the airbag body 100, and the coverage area of the edges of the sealing film 210 is greater than the area of the exhaust hole 110 region.
[0050] Referring to Figure 2 In some embodiments, the flexible fixing member 230 is a burst line, and the supporting film 220 is sewn to the airbag body 100 by the burst line. The burst line can be a high-strength breakable sewing thread, and at least one of the sewing method, thread strength, and stitch density of the burst line is associated with the set value of the internal pressure of the airbag, and the opening threshold of the exhaust hole 110 is dynamically adjusted by adjusting the thread parameters. After the burst line breaks, the supporting film 220 can completely separate from the airbag body 100, and the remaining thread and sealing fragments are discharged with the airflow, avoiding interference with the subsequent airbag contraction.
[0051] In some embodiments, the stitch density of the burst line is 0.1mm-6mm, the thread material can be high-strength polyethylene fiber, and the breaking strength of the thread material is ≥500N. By adjusting the thread strength (such as replacing polyester fiber or aramid fiber), sewing density, and diameter of the ring-shaped thread, the opening pressure threshold of the exhaust hole 110 can be accurately controlled. By adjusting the thread parameters (such as replacing high-strength polyethylene or aramid fiber), the opening pressure of the exhaust hole 110 can be accurately controlled, avoiding the threshold deviation problem caused by the poor consistency of the traditional burst film.
[0052] The edges of the supporting film 220 are fixed by the burst line in a ring-shaped path, and the thread path is located in the overlapping area of the supporting film 220 and the airbag body 100. The elastic modulus of the supporting film 220 and the sealing assembly matches the airbag body 100, which can avoid interface peeling caused by deformation differences.
[0053] Figure 4 is a structural schematic diagram of the exhaust hole of the buffer airbag shown in another embodiment of the present application;
[0054] Figure 5 is Figure 3 is a cross-sectional view along B-B.
[0055] Referring to Figure 4 and Figure 5 In some embodiments, the sealing member is a sealing glue 240, which is coated on the burst line sewing area between the airbag body 100 and the supporting film 220 to fill the thread gap and close the exhaust hole 110.
[0056] In some embodiments, the sealant 240 can be an elastic polymer material, which is filled in the suture needle hole gap of the sutured area, forms an airtight layer after curing, and is separated from the airbag main body 100 with the residual suture line after the support film 220 is detached. The sealant 240 can directly fill the suture needle hole gap to form a redundant airtight layer to prevent gas leakage from the suture line; at the same time, the support film 220 provides mechanical support to the sealant 240 through the suture tension to prevent seal failure due to air pressure peeling when the internal pressure does not reach the threshold.
[0057] In the present application, during the process of increasing the internal pressure of the airbag, the internal pressure pushes the support film 220 to expand outward, but the support film 220 remains fixed due to the suture tension limitation. The sealant 240 seals the suture gap to ensure that the gas cannot leak through the exhaust hole 110. When the internal pressure of the airbag reaches the set value, the suture line is broken under the action of the internal pressure, and the support film 220 is detached from the airbag main body 100. The sealant 240 is detached together with the residual suture line, the exhaust hole 110 is completely opened, and the gas is quickly discharged to achieve buffer control.
[0058] Figure 6 is a schematic diagram of the cooperation of the aircraft and the buffer airbag according to an embodiment of the present application.
[0059] Referring to Figure 6 The present application also provides an aircraft, which includes a fuselage 300, and the fuselage 300 is provided with an airbag assembly including the buffer airbag according to any of the above embodiments.
[0060] The aircraft of the present application includes but is not limited to: spacecraft such as return capsules, moon / mars landers, airbag assemblies installed on landing supports or the bottom of the cabin to absorb the impact of touching the ground; helicopters / vertical take-off and landing aircraft: airbag assemblies integrated into the bottom of the fuselage or under the seat to buffer the crash energy in emergency landing; unmanned aerial vehicles / cargo aircraft: airbag assemblies are deployed around the cargo compartment or precision equipment compartment to protect the equipment in hard landing.
[0061] In the aircraft landing system, multiple buffer airbags of the airbag assembly are arranged in an array at the bottom of the fuselage, each buffer airbag is independently controlled, and the landing attitude and impact force are monitored in real time through sensors to trigger the inflation and pressure relief of the airbags in the corresponding area to realize dynamic energy absorption. The aircraft provided by the present application provides a lightweight, high-reliability, and adaptive solution for aircraft crash protection through the flexible suture, redundant sealing, and dynamic pressure relief control technology of the buffer airbag, which significantly improves safety and economy.
[0062] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.
Claims
1. A cushion airbag characterized by, The airbag cushion comprises an airbag body and an exhaust assembly, the airbag body is provided with an exhaust hole, and the exhaust assembly is arranged at the exhaust hole; The exhaust assembly comprises a supporting film, a sealing member and a flexible fixing member, the supporting film is fixed to the airbag body through the flexible fixing member, and the sealing member is used for sealing a connecting area of the supporting film and the airbag body. When the air pressure in the airbag does not reach a set value, the supporting film is fixed to the airbag body through the tension of the flexible fixing member; when the air pressure in the airbag reaches the set value, the flexible fixing member is broken under the action of the air pressure, and the supporting film is separated from the airbag body to release the pressure of the airbag cushion.
2. The airbag cushion according to claim 1, wherein: The flexible fixing member is a burst line, and the supporting film is fixed to the airbag body through the burst line; when the air pressure in the airbag reaches the set value, the burst line is broken under the action of the air pressure in the airbag, so that the supporting film is separated from the airbag body.
3. The airbag cushion according to claim 2, wherein: The sealing member is a sealing film which is sealingly connected to the airbag body, and the sealing film covers at least a sewing area of the burst line on the inner surface of the airbag body.
4. The airbag cushion according to claim 2, wherein: The sealing member is sealing glue which is coated on the burst line sewing area between the airbag body and the supporting film, fills the gap between the stitches to seal the exhaust hole.
5. The airbag cushion according to claim 2, wherein: The burst line is a breakable high-strength crack line, and at least one of the sewing mode, the stitch strength and the stitch pitch of the burst line is associated with the set value of the air pressure in the airbag.
6. The airbag cushion according to claim 3, wherein: The sealing film covers the exhaust hole, the edge of the sealing film is seamlessly connected to the inner surface of the airbag body, and the coverage area of the edge of the sealing film is greater than the area of the exhaust hole area.
7. The airbag cushion according to claim 4, wherein: The sealing glue is filled in the gap between the stitch holes in the burst line sewing area, forms an airtight layer after curing, and is separated from the airbag body along with the residual section of the burst line after the supporting film falls off.
8. The airbag cushion according to claim 2, wherein: The supporting film covers the exhaust hole on the outer surface of the airbag body; the edge of the supporting film is sewn and connected to the airbag body through the burst line, and the middle area of the supporting film is suspended and covers the exhaust hole; The stitch path of the burst line is annular, and the stitch path is located in the overlapping area of the supporting film and the airbag body.
9. The airbag cushion according to any one of claims 1-8, comprising: The sealing member and the supporting film are made of flexible material.
10. An aircraft, characterized in that The aircraft body is provided with an airbag assembly, and the airbag assembly comprises the airbag cushion according to any one of claims 1-9.