Airbag filter metal braid cartridge

Abstract

The utility model relates to the technical field of automobile safety air bag, disclose safety air bag filter metal braid filter core, including roof, the top of roof is connected with the installation ring of sliding, the inside fixed connection of installation ring has the filter screen, the top left and right sides of installation ring all are seted up with the installation groove, the inner wall sliding connection of installation groove has the limit stop, the far side of two limit stops all are fixedly connected with fixed plate, the far side of two fixed plates all are fixedly connected with transmission rod, the far side of two transmission rods all are fixedly connected with reset component, in the utility model, utilize the elastic force of reset spring and finally realize the limit of installation ring, and the installation of filter screen is quickly completed, and when needing to take down and clean, only need to move fixed plate to both sides to remove the limit, make the installation and maintenance of whole filter core very convenient, save time and manpower cost.

Description

Technical Field

[0001] This utility model relates to the field of automotive airbag technology, and in particular to metal braided filter elements for airbag filters. Background Technology

[0002] Airbags are essential passive safety devices in modern automobiles and other vehicles. They are airbags that rapidly inflate upon impact, typically installed in areas such as the steering wheel, dashboard, side seats, and doors. When a vehicle experiences a collision of a certain intensity, collision sensors detect the signal and trigger the gas generator, causing the airbag to inflate and deploy rapidly. This creates a buffer between the occupants and hard objects inside the vehicle, reducing the impact force and lowering the risk of injury or death.

[0003] During airbag deployment, the gas generated by the gas generator may contain impurities or particles. The function of the airbag filter is to filter these gases, removing impurities, dust, particles, and other substances to ensure the purity of the gas entering the airbag. This guarantees the proper functioning of the airbag during deployment, preventing blockages and other issues from affecting the airbag's inflation speed, shape, and cushioning effect, thus ensuring the airbag effectively protects the occupants during a vehicle collision.

[0004] Traditional filters have a complex installation structure, often requiring multiple tools or complicated procedures to complete. This not only consumes a lot of time and increases production costs during the production and assembly process, but also makes disassembly extremely inconvenient when the filter needs maintenance or filter screen replacement later. Therefore, the metal braided filter element for airbags is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a metal braided filter element for airbag filters, which aims to improve the problem that the filter screen of some existing filters is difficult to disassemble and install quickly, affecting maintenance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An airbag filter metal braided filter element includes a top plate, a mounting ring slidably connected to the top of the top plate, a filter screen fixedly connected inside the mounting ring, mounting grooves on both the left and right sides of the top of the mounting ring, limit blocks slidably connected to the inner walls of the mounting grooves, fixing plates fixedly connected to the opposite sides of the two limit blocks, transmission rods fixedly connected to the opposite sides of the two fixing plates, reset components fixedly connected to the opposite sides of the two transmission rods, and an impact-resistant component fixedly connected to the bottom end of the top plate.

[0008] As a further description of the above technical solution:

[0009] The reset assembly includes two circular plates, with the adjacent side of the two circular plates fixedly connected to the distant side of the two transmission rods, and a reset spring fixedly connected to the distant side of each of the two circular plates.

[0010] As a further description of the above technical solution:

[0011] The impact-resistant component includes an outer woven mesh, the top end of which is fixedly connected to the bottom end of the top plate, and multiple support rings are fixedly connected to the inner wall of the outer woven mesh, with an inner woven mesh fixedly connected to the inner wall of the multiple support rings.

[0012] As a further description of the above technical solution:

[0013] A sealing ring is fixedly connected to the bottom inner wall of the mounting ring, and the bottom side of the sealing ring contacts the top side of the top plate. The outer walls of the two fixing plates are slidably connected to the top inner wall of the top plate, and the outer walls of the two transmission rods are slidably connected to the top inner wall of the top plate.

[0014] As a further description of the above technical solution:

[0015] Two chambers are formed on the inner top side of the top plate. The outer walls of the two circular plates are slidably connected to the inner walls of the chambers. The opposite sides of the two return springs are fixedly connected to the opposite inner walls of the two chambers.

[0016] As a further description of the above technical solution:

[0017] Both the outer and inner woven meshes are made of 316L stainless steel wire braiding layers, the support ring is made of nickel-titanium shape memory alloy, and the support ring is shaped like a ring wave.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, during installation, the mounting ring is pressed against the top of the top plate, and the limiting block is squeezed and moved. The fixed plate and the transmission rod drive the circular plate to squeeze the reset spring. The elastic force of the reset spring is used to finally limit the mounting ring, and the filter screen is quickly installed. When it needs to be removed for cleaning, the limiting can be released by simply moving the fixed plate to both sides. This makes the installation and maintenance of the entire filter element very convenient, saving time and labor costs.

[0020] 2. In this utility model, the outer woven mesh is woven with a high mesh count, and the inner woven mesh is woven with a low mesh count. The outer woven mesh can effectively intercept primary particles, while the inner woven mesh reduces airflow resistance. The two form a gradient filtration structure with a dense outer layer and a sparse inner layer, which greatly improves filtration efficiency. At the same time, the support ring in the impact-resistant component is wavy and made of nickel-titanium shape memory alloy, which can decompose the axial impact force into a radial component force and utilize the superelasticity of the shape memory alloy to absorb energy, thereby enhancing the overall impact resistance of the filter element and ensuring the stable filtration performance of the filter element under various working conditions. Attached Figure Description

[0021] Figure 1 This is a perspective view of the metal braided filter element of the airbag filter proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the support ring of the metal braided filter element for the airbag filter proposed in this utility model;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0024] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0025] Legend:

[0026] 1. Top plate; 2. Mounting ring; 3. Filter screen; 4. Mounting groove; 5. Limiting block; 6. Fixing plate; 7. Transmission rod; 8. Circular plate; 9. Return spring; 10. Sealing ring; 11. Outer braided mesh; 12. Support ring; 13. Inner braided mesh. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figure 1 , Figure 2 and Figure 3This utility model provides an embodiment of an airbag filter metal braided filter element, including a top plate 1. A mounting ring 2 is slidably connected to the top of the top plate 1. The top plate 1 provides a basic support frame for the entire filter element structure. Its slidable connection with the mounting ring 2 allows for accurate installation and positioning of the mounting ring 2. A filter screen 3 is fixedly connected inside the mounting ring 2. Mounting grooves 4 are provided on both the left and right sides of the top of the mounting ring 2. Limiting blocks 5 are slidably connected to the inner walls of the mounting grooves 4. The mounting ring 2 serves as a fixed carrier for the filter screen 3, and its installation method with the top plate 1 enables quick installation and removal of the filter screen 3. The mounting grooves 4 at the top of the mounting ring 2 provide space for the limiting blocks 5 to ensure stability after installation. The internally fixed filter screen 3 is the core filtering component, directly contributing to the filtering function. Two limiting blocks 5 are fixedly connected to opposite sides of a fixed plate 6. The outer walls of the two fixed plates 6 are slidably connected to the inner top wall of the top plate 1. Two transmission rods 7 are fixedly connected to opposite sides of the two fixed plates 6. The outer walls of the two transmission rods 7 are slidably connected to the inner top wall of the top plate 1. The slidable connection between the top plate 1, the fixed plates 6, and the transmission rods 7 provides guidance for the movement of the limiting blocks 5 and the entire installation and disassembly mechanism, ensuring the orderly operation of all components. A sealing ring 10 is fixedly connected to the bottom inner wall of the mounting ring 2. The bottom side of the sealing ring 10 contacts the top side of the top plate 1, and the sealing ring 10 can completely fill the gap between the top plate 1 and the mounting ring 2, ensuring a sealing effect. A good seal can prevent leakage during the filtration process, ensure the accuracy and efficiency of filtration, and improve the overall filtration performance of the filter element.

[0029] A reset assembly is fixedly connected to the far side of each of the two transmission rods 7. The reset assembly includes two circular plates 8, with the near side of the two circular plates 8 fixedly connected to the far side of the two transmission rods 7. A reset spring 9 is fixedly connected to the far side of each of the two circular plates 8. The limiting block 5 moves to both sides under the pressure of the mounting ring 2. The circular plates 8 are driven by the fixing plate 6 and the transmission rods 7 to press the reset spring 9. When the pressure of the mounting ring 2 is removed, it can reset and cooperate with the mounting groove 4 for limiting. This mechanism facilitates the fixing and disassembly of the mounting ring 2. Two chambers are opened on the top side of the top plate 1. The outer walls of the two circular plates 8 are slidably connected to the inner walls of the chambers. The far side of the two reset springs 9 is fixedly connected to the far side inner walls of the two chambers. During the pressing and resetting process, the reset spring 9 stores and releases energy to control the movement of the limiting block 5. The chambers provide space for the sliding of the circular plates 8, ensuring the stability of the entire structure and the accuracy of the operation.

[0030] Reference Figure 1 , Figure 2 and Figure 4An impact-resistant assembly is fixedly connected to the bottom of the top plate 1. This assembly includes an outer woven mesh 11, the top of which is fixedly connected to the bottom of the top plate 1. The outer woven mesh 11 uses a high mesh count weave, effectively intercepting primary particles and serving as the first line of defense in filtration. Multiple support rings 12 are fixedly connected to the inner wall of the outer woven mesh 11. These support rings 12 are made of nickel-titanium shape memory alloy and have a ring-shaped wave pattern. This allows them to decompose axial impact force into radial force and utilize the superelasticity of the shape memory alloy to absorb energy. An inner woven mesh 13 is fixedly connected to the inner wall of the multiple support rings 12. Both the outer woven mesh 11 and the inner woven mesh 13 are made of 316L stainless steel wire. The low mesh count of the inner woven mesh 13 reduces airflow resistance. These three components work together to form a gradient filtration structure, improving overall performance.

[0031] Working principle: By pressing the mounting ring 2 onto the top mounting position of the top plate 1, the limiting block 5 will move to both sides due to the pressure of the mounting ring 2. The limiting block 5 moving to both sides drives the circular plate 8 to press the return spring 9 through the connection of the fixing plate 6 and the transmission rod 7. When the mounting ring 2 is completely in contact with the top plate 1 and the sealing ring 10 completely fills the gap between the top plate 1 and the mounting ring 2, the limiting block 5 loses the pressure of the mounting ring 2 and moves inward by the pressure generated when the return spring 9 is compressed. The moving limiting block 5 cooperates with the mounting groove 4 to limit the mounting ring 2, thereby realizing the quick installation of the filter screen 3. When it needs to be removed for cleaning, the limiting can be released by moving the fixing plate 6 to both sides, which facilitates the maintenance of the filter screen 3.

[0032] The outer woven mesh 11 uses high mesh count weaving to achieve primary particle interception, while the inner woven mesh 13 uses low mesh count weaving to reduce airflow resistance, forming a gradient filtration structure with a dense outer layer and a sparse inner layer. Combined with the wave-shaped design of the support ring 12, the axial impact force can be decomposed into a radial component force. The energy is absorbed through the superelastic properties of the shape memory alloy, which increases the performance of the metal woven filter element.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A metal braided filter element for an airbag, comprising a top plate (1), characterized in that: The top of the top plate (1) is slidably connected to an installation ring (2), and a filter screen (3) is fixedly connected inside the installation ring (2). The top left and right sides of the installation ring (2) are provided with installation grooves (4). The inner wall of the installation groove (4) is slidably connected to a limit block (5). The opposite sides of the two limit blocks (5) are fixedly connected to a fixing plate (6). The opposite sides of the two fixing plates (6) are fixedly connected to a transmission rod (7). The opposite sides of the two transmission rods (7) are fixedly connected to a reset assembly. The bottom end of the top plate (1) is fixedly connected to an impact-resistant assembly.

2. The metal braided filter element for airbags according to claim 1, characterized in that: The reset assembly includes two circular plates (8), with the adjacent side of the two circular plates (8) fixedly connected to the distant side of the two transmission rods (7), and a reset spring (9) fixedly connected to the distant side of each of the two circular plates (8).

3. The metal braided filter element for airbags according to claim 1, characterized in that: The impact-resistant component includes an outer woven mesh (11), the top end of which is fixedly connected to the bottom end of the top plate (1), and a plurality of support rings (12) are fixedly connected to the inner wall of the outer woven mesh (11), and an inner woven mesh (13) is fixedly connected to the inner wall of the plurality of support rings (12).

4. The metal braided filter element for airbags according to claim 1, characterized in that: A sealing ring (10) is fixedly connected to the bottom inner wall of the mounting ring (2). The bottom side of the sealing ring (10) is in contact with the top side of the top plate (1). The outer walls of the two fixing plates (6) are slidably connected to the top inner wall of the top plate (1). The outer walls of the two transmission rods (7) are slidably connected to the top inner wall of the top plate (1).

5. The metal braided filter element for airbags according to claim 2, characterized in that: The top plate (1) has two chambers on its inner top side. The outer walls of the two circular plates (8) are slidably connected to the inner walls of the chambers. The two return springs (9) are fixedly connected to the inner walls of the two chambers on opposite sides.

6. The airbag filter metal braided filter element according to claim 3, characterized in that: The outer woven mesh (11) and the inner woven mesh (13) are both made of 316L stainless steel wire woven layer, the support ring (12) is made of nickel-titanium shape memory alloy, and the support ring (12) is shaped like a ring wave.

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