Multi-layer air bag with different strength inside and outside

Abstract

The application discloses a multi-layer anti-large-overload buffer air bag with different strength inside and outside, which is suitable for load buffering application scenarios with different strength impact overload. The multi-layer anti-large-overload buffer air bag with different strength inside and outside mainly comprises an inner air bag, an outer air bag, a chamber diaphragm and a fixing accessory. The inner air bag is integrated and used for providing support force for the load in the buffering process; the outer air bag is attached to the outer region of the inner air bag and used for protecting the inner air bag and the buffer; the diaphragm is located in the inner region of the outer air bag and used for separating different chambers of the outer air bag; and the fixing accessory is connected at the inner side of the cavity of the inner air bag and used for fixing the air bag and the buffer. The multi-layer anti-large-overload buffer air bag with different strength inside and outside has higher impact overload reduction capacity and can adapt to the buffering working condition when the chamber is damaged.

Description

Technical Field

[0001] This invention relates to the field of airbag technology, and more particularly to a multi-layered airbag with different internal and external strengths to resist large overload. Background Technology

[0002] Airbags, as an important means of reducing landing impact overload, are widely used in spacecraft landing and recovery, airdrop of supplies, and soft landing of payloads. With the widespread application of airbags in aerospace research and practical engineering, the requirements for airbag landing stability, reliability, and reusability are gradually increasing. Analyzing and improving the design of factors affecting the performance of cushioning airbags is an important prerequisite for ensuring the safe landing of payloads.

[0003] Sealed airbags have a relatively simple structure. These airbags do not have an exhaust system, offer high reliability, and can completely enclose the affected object, providing excellent protection. They are widely used in aerospace research and practical engineering. Multi-chamber airbags can provide good reliability for cushioning in complex landing environments, but they also have certain drawbacks. For example, if an air chamber ruptures, the cushioned object may not be completely enclosed and could easily touch the ground, requiring a higher level of reliability from the airbag. Summary of the Invention

[0004] To address the aforementioned technical problems, the present invention aims to provide a multi-layered, high-overload-resistance airbag with different internal and external strengths. This airbag can be designed to withstand scenarios where some chambers of the airbag are damaged due to complex landing environments. By designing the internal and external structures, the airbag is reinforced, thereby improving the reliability of the airbag in complex landing environments and enabling it to maintain stable landing of the buffer object and prevent collision between the buffer object and the ground.

[0005] To achieve the above objectives, the present invention provides the following solution: A multi-layered, high-overload-resistance airbag with different internal and external strengths, comprising: The inner airbag is a sealed airbag with a hollow cylindrical structure and an internal cavity for placing cushioning material. The manufacturing method of the inner airbag can be either a one-piece cut type or a multi-piece splicing type, depending on the actual conditions; the multi-piece splicing type is more commonly chosen.

[0006] An outer airbag, the outer surface of which is covered by the inner airbag, the outer airbag being cylindrical in shape according to the stress distribution on the airbag surface during the landing of the buffer, and covered on the inner airbag by sewing.

[0007] The diaphragm is rectangular and symmetrically distributed, and is used to separate the external airbag into independent, non-flowing chambers by sewing.

[0008] A fixing accessory is provided, one end of which is connected to the inner side of the cylindrical cavity of the inner airbag, and the other end is constricted and has a structure that can fix the load-bearing object.

[0009] The multi-layered, high-overload-resistance airbags with different inner and outer strengths according to embodiments of the present invention have at least the following technical effects: the inner airbag is a complete flexible body that inflates and deforms under the action of the inflatable cylinder, completely enveloping the cushioned object. When the system contacts the landing surface, the inner airbag absorbs the load's kinetic energy by compressing its volume, reducing the load's speed. The outer airbag inflates and deforms under the action of the inflatable cylinder, completely enveloping the inner airbag. When the system contacts the landing surface, the outer airbag is in direct contact with the landing surface. The outer airbag absorbs part of the load's kinetic energy by compressing its volume, reducing the load's speed, and has the performance of providing support for the inner airbag and the load. The diaphragm can strengthen the internal structure of the outer airbag, enhance the speed at which the outer airbag absorbs the load's kinetic energy, and enhance the performance of the outer airbag in providing support for the inner airbag. The fixing attachment transmits tensile force between the airbag system and the load object, and has the ability to connect and mount with the load object.

[0010] In some embodiments of the present invention, the inner airbag serves as a base layer that absorbs load kinetic energy and bears most of the volume compression, and is either a one-piece cut type or a multi-piece spliced ​​type. In some embodiments of the present invention, the height of the inner airbag h The square of 1 is not greater than 2.2 times the area of ​​the base; the upper and lower ends of the inner airbag cavity have cylindrical channels, the center of which coincides with the upper and lower circular surfaces of the inner airbag, and its radius... r The length is determined based on the requirements of the cushioning system, and is usually not greater than the radius of the bottom surface of the inner airbag. R 20% of 1.

[0011] In some embodiments of the present invention, the height of the external airbag h The square of 2 is not greater than 2.2 times the area of ​​the base; the upper and lower ends of the external airbag cavity have cylindrical channels with a radius of... r The length is the same as that of the inner airbag, and is usually no greater than the radius of the bottom surface of the inner airbag. R 20% of 1.

[0012] In some embodiments of the present invention, the inner airbag material is selected from the material of the reinforced airbag, and the strength e of the selected material for the inner airbag is... 内 The strength of the materials selected for the external airbag e 外 The ratio should generally be greater than 1.2.

[0013] In some embodiments of the present invention, the inflation pressure of the inner airbag is... P 1. Initial inflation pressure of the external airbag P The ratio of 2 should be greater than 1.2 and less than 1.8.

[0014] In some embodiments of the present invention, the diaphragm divides the external airbag into mutually independent and non-communicating chambers, with at least two chambers, and their connection points are evenly distributed, with each chamber being completely independent.

[0015] The advantages of this invention are as follows: This invention provides a multi-layered anti-overload buffer airbag with different inner and outer strengths. The multi-chamber structure can improve the reliability of the buffer structure in complex landing environments, overcome the ability of the buffer to withstand large impact overloads when colliding with the ground, and ensure the stable landing of the load. It ensures that the airbag does not fail to buffer due to complex landing environments or damage to a single chamber. When the outer airbag ruptures, the airbag system can still achieve all-directional protection. Attached Figure Description

[0016] Figure 1 This is an isometric view of the overall structure of one embodiment of the present invention; Figure 2 This is an overall schematic diagram of one embodiment of the present invention; Figure 3 This is a schematic isometric view of a single-chamber external airbag according to an embodiment of the present invention; Figure 4 This is a schematic isometric view of the internal airbag according to an embodiment of the present invention; Figure 5 This is a graph showing the calculation results of load overload changes when an external airbag ruptures according to an embodiment of the present invention.

[0017] Marked in the image: Inner airbag-100, outer airbag-200, diaphragm-300. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Examples of these embodiments are illustrated in detail in the drawings, and the same reference numerals in the series of drawings denote the same parts. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0019] In the description of this patent, it should be understood that the descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description process, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0020] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is for the purpose of distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] refer to Figure 1 As shown, this invention is a multi-chamber airbag with an internal and external structure, which can overcome the failure of airbag cushioning performance in complex landing environments and has good cushioning performance in complex environments. It includes an inner airbag 100, an outer airbag 200, a diaphragm 300, and fixing accessories.

[0023] The inner airbag 100 is an integrated sealed airbag and is the main structure of the inner and outer buffer airbags. The inner airbag is a hollow cylinder with a cavity for placing buffer material inside. It plays a role in absorbing the kinetic energy of the load during the operation of the airbag. The outer airbag 200 is surrounded by the inner airbag, and the fixing accessories are attached to the inner cavity side.

[0024] The outer airbag 200 enhances the structural strength of the airbag system, preventing the inner airbag 100 from directly contacting the ground during the cushioning process. This reduces the stress on the inner airbag 100 during cushioning, preventing damage to the inner airbag surface due to stress concentration and cracking in the edge areas, thus ensuring the structural integrity of the inner airbag 100. The diaphragm 300 divides the outer airbag 200 into independent, non-communicating chambers, ensuring that the outer airbag 200 absorbs load kinetic energy uniformly. This increases the structural strength of the outer edge of the outer airbag 200, preventing cushioning failure when some areas of the outer airbag 200 rupture, improving the reliability of the outer airbag during the cushioning process, and also increasing the adhesion strength of the outer airbag 200 to the inner airbag 100.

[0025] The fixing attachments are generally rope-like devices used to connect the load object and the inner airbag 100. There are many types of rope-like devices, and no restrictions are placed here. The connection points between the fixing attachments and the inner airbag 100 are distributed inside the cylindrical cavity of the inner airbag 100, with two symmetrically distributed or multiple evenly distributed connection points. The distance between the connection points and the upper and lower ends of the inner airbag 100's internal cavity is not limited. The connection between the fixing attachments and the inner airbag 100 can be achieved through various methods such as sewing or ring fastening, and no restrictions are placed here. One end of the fixing attachment connects to the inner cylindrical cavity of the inner airbag 100, and the other end is uniformly gathered to connect and mount the load object.

[0026] The materials used in the various components of this invention include, but are not limited to, commonly used materials in airbag engineering, and the corresponding dimensional parameters should be determined in combination with material properties and engineering requirements.

[0027] In some embodiments of the present invention, the height of the inner airbag 100 h The square of 1 is not greater than 2.2 times the area of ​​the base; the upper and lower ends of the internal cavity of the inner airbag 100 have cylindrical channels, the center of which coincides with the upper and lower circular surfaces of the inner airbag, and its radius is... r The length is determined based on the requirements of the cushioning system, and is usually not greater than the radius of the bottom surface of the inner airbag. R 20% of 1.

[0028] If the height of the internal airbag is 100 h The square of 1 and the area of ​​the base A If the ratio is large, meaning the height of the inner airbag 100 is relatively small compared to its bottom area, the airbag system is prone to tilting during cushioning and landing. The upper part of the inner airbag 100 may experience a secondary collision with the ground, and the load is prone to tipping over during cushioning, bearing a large impact overload, which is detrimental to the system's stable landing. If the height of the inner airbag 100 is too large... h The square of 1 and the area of ​​the base A The ratio is relatively small, meaning that the height of the inner airbag 100 is relatively large compared to the bottom area of ​​the inner airbag 100. During the buffering and landing process, the airbag system is less likely to tilt, which is beneficial to the stable landing of the load device.

[0029] If the radius of the cylindrical channel of the internal airbag 100 r The length of the inner airbag is the same as the radius of its bottom surface. R 1 is relatively large, that is, the radius of the cylindrical channel of the inner airbag 100. r Compared to the relatively small bottom radius of the inner airbag 100, the effective contact area between the airbag system and the ground is small during cushioning and landing. This results in greater compression of the airbag, potentially leading to severe stress concentration in certain areas of the inner airbag 100. Consequently, the inner airbag is prone to rupture during cushioning, which is detrimental to a stable landing. Furthermore, if the cylindrical channel radius of the inner airbag 100 is... r The length of the inner airbag is the same as the radius of its bottom surface. R 1 is relatively small, that is, the radius of the cylindrical channel of the inner airbag 100. r Compared to the smaller bottom radius of the inner airbag 100, the airbag system has a larger effective contact area with the ground during buffering and landing, which is beneficial for the stable landing of the load device.

[0030] In some embodiments of the present invention, the height of the external airbag 200h The square of 2 is not greater than 2.2 times the area of ​​the base; the upper and lower ends of the internal cavity of the outer airbag 100 have cylindrical channels, the center of which coincides with the upper and lower circular surfaces of the inner airbag 100, and its radius is... r The length is determined based on the requirements of the cushioning system, and is usually not greater than the radius of the bottom surface of the inner airbag. R 20% of 1.

[0031] In some embodiments of the present invention, the outer airbag 200 is typically made of common airbag materials, such as nylon fabric, polyamide fabric, and polyurethane, while the inner airbag 100 is made of a reinforced airbag material. The strength of the material selected for the inner airbag 100 should be greater than that of the material selected for the outer airbag 200, typically e 内 and e 外 The ratio should be greater than 1.2.

[0032] If the ratio of the material strength selected for the inner airbag 100 to the material strength selected for the outer airbag 200 is less than 1.2, that is, the material strength selected for the inner airbag 100 is relatively low, during the cushioning and landing process, when the airbag system is in a complex environment during landing, the outer airbag will break due to the greater strength it bears, and the inner airbag will directly contact the ground during the cushioning process. The inner airbag is prone to breakage due to its lower strength, which cannot guarantee the reliability of the airbag during landing and is not conducive to the stable landing of the protection system.

[0033] In some embodiments of the present invention, the inflation pressure of the outer airbag should be reasonably selected, and the inflation pressure of the inner airbag 100 should be... P 1. Initial inflation pressure of the external airbag 200 P The ratio of 2 should be greater than 1.2 and less than 1.8.

[0034] If the selected inflation pressure of the inner airbag 100 P 1. Initial inflation pressure of the external airbag 200 P The ratio of 2 is less than 1.2, meaning the inflation pressure selected for the inner airbag 100 is relatively low. When part of the outer airbag 200 ruptures, the inner airbag cannot provide adequate cushioning, and the cushioning material... z Large directional displacement can easily cause the buffer to make contact with the ground, resulting in a hard landing and failing to guarantee a stable landing for the load; if the selected inflation pressure of the internal airbag 100 is... P 1. Initial inflation pressure of the external airbag 200 P The ratio of 2 is greater than 1.8, which means that the inflation pressure selected for the inner airbag 100 is relatively large. During the buffering process, the efficiency of the conversion between the load kinetic energy and the internal energy of the airbag is low, the system rebound phenomenon is obvious, which is not conducive to the stable landing of the device.

[0035] Reference Figure 3As shown, the inner airbag 100, the outer airbag 200 and the diaphragm 300 are sewn together with the inner airbag 100 as the base surface, and the outer airbag 200 is attached to the outside of the inner airbag 100.

[0036] The outer airbag 200 is attached to the inner airbag 100 by sewing. The outer airbag 300 wraps around the outer edge of the inner airbag 100.

[0037] The diaphragm 300 is attached to the inside of the external airbag 200 by sewing. The specific sewing area, sewing method and sewing materials are varied and will be determined according to the engineering requirements. No restrictions are imposed here.

[0038] This invention is not limited to the preferred embodiments described above. Anyone inspired by this invention can derive other products in various other forms. However, regardless of any changes in shape or structure, any technical solution that is the same as or similar to this invention is within its protection scope.

[0039] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-layered, high-overload-resistance buffer airbag with different internal and external strengths, characterized in that, The airbag includes: An inner airbag (100) is a cylindrical single air chamber with a cylindrical cavity inside; An outer airbag (200) is provided on the side surface of the inner airbag. The outer airbag is a circular airbag surrounding the outer side of the inner airbag (100). A diaphragm (300) is provided inside the outer airbag (200), radiating outward from the center. The diaphragm (300) divides the outer airbag (200) into different independent air chambers inside the outer airbag (200). A fixing accessory is provided, with one side connected to the upper and lower edges of the cylindrical cavity inside the inner airbag, and the other side converging into one piece, for connecting the load object.

2. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 1, characterized in that, The inner airbag (100) has a cylindrical airbag structure and contains a cylindrical cavity center area for placing the cushioned object.

3. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 2, characterized in that, The internal airbag (100) is either a one-piece cut type or a multi-piece spliced ​​type; The integrated cutting type specifically refers to: the inner airbag is obtained by cutting a whole piece of fabric, and the connection between its outer area and the outer airbag is a uniform transition. The multi-body splicing type specifically refers to an inner air bladder made by processing fabrics of predetermined shapes and sewing them together, with the outer region of the inner air bladder connected to the outer air bladder by sewing.

4. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 3, characterized in that, The height of the inner airbag (100) h The square of 1 is not greater than 2.2 times the area of ​​the bottom surface; the upper and lower ends of the cavity of the inner airbag (100) have cylindrical channels, which provide space for the connection of the buffer material and the buffer system such as the parachute, and its radius is r The length is determined based on the requirements of the buffer system, and the radius... r The length is not greater than the bottom radius of the inner airbag (100). R 20% of 1.

5. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 4, characterized in that, The outer airbag (200) surrounds the inner airbag (100), and the outer airbag (200) provides support for the inner airbag (100) during the cushioning process, preventing the inner airbag (100) from contacting the landing surface during the cushioning process.

6. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 5, characterized in that, The material strength e selected for the inner airbag (100) 内 The material strength is greater than that selected for the external airbag (200). e 外 e 内 and e 外 The ratio is greater than 1.

2.

7. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 6, characterized in that, The inflation pressure of the inner airbag (100) P 1. Initial inflation pressure of the external airbag (200) P The ratio of 2 is greater than 1.2 and less than 1.

8.

8. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 7, characterized in that, The diaphragm (300) can be a one-piece cut type or a multi-piece spliced ​​type; The integrated cut type specifically refers to a diaphragm obtained by cutting a whole piece of fabric, and its connection with the external airbag (200) is a uniform transition form; The multi-body splicing type specifically refers to a diaphragm made by processing fabrics of specific shapes and sewing them together, and its connection with the external airbag (200) is in the form of sewing.

9. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 8, characterized in that, One end of the diaphragm (300) is connected to the outside of the outer airbag (200), and the other end is connected to the interface between the outer airbag (200) and the inner airbag (100), dividing the outer airbag (200) into independent chambers that are not interconnected.

10. The multi-layered anti-overload buffer airbag with different internal and external strengths according to claim 1, characterized in that, The inner airbag (100), the outer airbag (200), the diaphragm (300), and the fixing accessories are all capable of withstanding sewing.

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