A metal woven mesh for an airbag filter cartridge

Abstract

The utility model relates to the technical field of automobile safety air bag, disclose a kind of metal woven mesh for safety air bag filter filter element, including top shell, the bottom end of top shell is fixedly connected with annular sleeve, multiple round holes are evenly opened in the inside of annular sleeve along the circumference direction, the inner wall of annular sleeve is fixedly connected with coarse hole woven mesh, the inner wall of coarse hole woven mesh is fixedly connected with multiple annular reinforcing ribs, the inner wall of multiple annular reinforcing ribs is fixedly connected with fine hole woven mesh, the outer wall of coarse hole woven mesh is coated with flow guide coating, the bottom end of annular sleeve is fixedly connected with the positioning assembly for facilitating assembly. In the utility model, coarse hole woven mesh can block larger metal scrap and impurity, and fine hole woven mesh is in the inner layer of coarse hole woven mesh, when gas passes, fine hole woven mesh can firmly intercept tiny particles, further improve the precision of filtration.

Description

Technical Field

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

[0002] Automotive safety systems are a combination of technologies and devices designed to protect the safety of vehicle occupants and improve vehicle driving safety. They encompass active and passive safety systems. Active safety systems include anti-lock braking systems (ABS) and electronic stability programs (ESP), which function before an accident occurs, intervening in vehicle handling to prevent accidents. Passive safety systems function during an accident, such as anti-collision beams in the vehicle's structural design, absorbing and dispersing collision energy. Airbags are a crucial passive safety device; when a collision occurs, airbags deploy rapidly, creating a buffer between the occupants and the vehicle's rigid components, reducing injury to the occupants.

[0003] An airbag is a passive safety device in automobiles. It typically consists of sensors, a gas generator, the airbag itself, and a control unit. When a collision occurs and the impact intensity reaches a threshold set by the sensors, the sensors send a signal to the control unit. The control unit then triggers the gas generator to rapidly produce a large amount of gas, causing the airbag to inflate and deploy quickly. This creates a soft buffer zone between the occupants and the vehicle's interior structure (such as the steering wheel and dashboard), thereby reducing the impact force on the occupants during the collision and minimizing the risk of injury or death.

[0004] However, in existing technologies, some airbag filter elements can only block larger impurities and are not effective at filtering small particles. As a result, during airbag deployment, there may still be tiny impurities that affect the normal function of the airbag or cause potential harm to the occupants. To address this issue, a metal woven mesh airbag filter element is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a metal woven mesh for airbag filter elements, aiming to improve the problem that some airbag filter elements in the prior art are unable to filter all impurities.

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

[0007] A metal braided mesh for an airbag filter element includes a top shell, an annular sleeve fixedly connected to the bottom end of the top shell, a plurality of circular holes evenly formed along the circumference inside the annular sleeve, a coarse-pore braided mesh fixedly connected to the inner wall of the annular sleeve, a plurality of annular reinforcing ribs fixedly connected to the inner wall of the coarse-pore braided mesh, a fine-pore braided mesh fixedly connected to the inner wall of the plurality of annular reinforcing ribs, a flow-guiding coating on the outer wall of the coarse-pore braided mesh, and a positioning component fixedly connected to the bottom end of the annular sleeve for easy assembly.

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

[0009] The positioning component includes a mounting base, the top of which is fixedly connected to the bottom of the annular sleeve, and positioning blocks are fixedly connected to the four corners of the bottom of the mounting base. The positioning blocks are trapezoidal in shape.

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

[0011] The top end of the coarse-mesh woven mesh is fixedly connected to the bottom end of the top shell, the top end of the fine-mesh woven mesh is fixedly connected to the bottom end of the top shell, the material of the annular sleeve is 304 stainless steel with aluminum plating, and the material of the annular reinforcing rib is nickel-chromium alloy.

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

[0013] Both the coarse-mesh woven mesh and the fine-mesh woven mesh are made of 316L stainless steel wire, and the flow-guiding coating is made of composite ceramic coating.

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

[0015] A sealing ring is fixedly connected to the bottom end of the mounting base, and a wear-resistant layer is fixedly connected to the bottom side of the positioning block. The wear-resistant layer is made of tungsten-cobalt alloy.

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

[0017] A reinforcing ring is fitted around the annular sleeve, and the bottom end of the reinforcing ring is fixedly connected to the top end of the mounting base.

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

[0019] 1. In this utility model, the round holes inside the annular sleeve can initially divert the high-temperature gas when the airbag is activated, avoiding excessive local pressure. The annular reinforcing ribs inside the coarse-pore woven mesh can prevent the mesh surface from collapsing, ensuring a smooth passage for the gas and improving filtration efficiency. The coarse-pore woven mesh can block larger metal fragments and impurities, while the fine-pore woven mesh is in the inner layer of the coarse-pore woven mesh. When the gas passes through, the fine-pore woven mesh can firmly intercept tiny particles, further improving the filtration accuracy.

[0020] 2. In this utility model, the mounting base, positioning block, sealing ring and wear-resistant layer in the positioning component cooperate with each other. The positioning block ensures that the filter element and the airbag device are perfectly aligned. The wear-resistant layer prevents wear during repeated disassembly and assembly. When high-temperature gas flows through, the sealing ring expands slightly due to heat and automatically fills the gap to prevent gas leakage. This makes the entire filter element structurally stable and able to work normally in the complex working environment of the safety airbag. Attached Figure Description

[0021] Figure 1 This is a perspective view of a metal woven mesh for an airbag filter element proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the annular reinforcing rib of the metal woven mesh for an airbag filter element 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 shell; 2. Annular sleeve; 3. Round hole; 4. Coarse-hole woven mesh; 5. Annular reinforcing rib; 6. Fine-hole woven mesh; 7. Flow guiding coating; 8. Mounting base; 9. Positioning block; 10. Sealing ring; 11. Wear-resistant layer; 12. Reinforcing ring. 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 a metal braided mesh for an airbag filter element, comprising a top shell 1, with an annular sleeve 2 fixedly connected to the bottom end of the top shell 1. The annular sleeve 2 is made of 304 stainless steel with an aluminum-plated surface, possessing certain strength and corrosion resistance, and can adapt to the complex environment during airbag operation. Multiple circular holes 3 are evenly distributed circumferentially inside the annular sleeve 2, allowing for initial diversion of the high-temperature gas during airbag activation to prevent excessive local pressure. A coarse-mesh braided mesh 4 is fixedly connected to the inner wall of the annular sleeve 2, blocking larger metal debris and impurities. The top end of the coarse-mesh braided mesh 4 is fixedly connected to the bottom end of the top shell 1, and multiple annular reinforcing ribs 5 are fixedly connected to the inner wall of the coarse-mesh braided mesh 4. The annular reinforcing ribs 5 are made of nickel-chromium alloy. The annular reinforcing ribs 5 prevent the mesh from collapsing, ensuring a smooth passage for gas and improving filtration efficiency. During airbag operation, they maintain the stability of the filter structure, ensuring continuous and effective filtration. Fine-mesh woven mesh 6 is fixedly connected to the inner walls of multiple annular reinforcing ribs 5. Both the coarse-mesh woven mesh 4 and the fine-mesh woven mesh 6 are made of 316L stainless steel wire. The top of the fine-mesh woven mesh 6 is fixedly connected to the bottom of the top shell 1. When gas passes through, the fine-mesh woven mesh 6 firmly intercepts tiny particles, further improving filtration accuracy. The top shell 1 provides fixed connection points for components such as the annular sleeve 2, the coarse-mesh woven mesh 4, and the fine-mesh woven mesh 6, ensuring the stability of the entire filter structure and guaranteeing that all components work together during airbag activation, ensuring the normal operation of the filtration process. The outer wall of the coarse-pore woven mesh 4 is coated with a flow-guiding coating 7. The flow-guiding coating 7 is made of composite ceramic coating. When the airbag is working, the flow-guiding coating 7 can guide the gas to diffuse evenly, making the gas flow inside the filter element more stable and helping each filter component to play its role. The bottom end of the annular sleeve 2 is fixedly connected with a positioning component for easy assembly.

[0029] Reference Figure 1 , Figure 2 and Figure 4 The positioning assembly includes a mounting base 8, the top of which is fixedly connected to the bottom of an annular sleeve 2. Positioning blocks 9, trapezoidal in shape, are fixedly connected to the four corners of the bottom of the mounting base 8 to ensure a tight fit between the filter element and the airbag device. A sealing ring 10 is fixedly connected to the bottom of the mounting base 8. When high-temperature gas flows through, the sealing ring 10 expands slightly due to heat, automatically filling the gaps and preventing gas leakage. A wear-resistant layer 11, made of tungsten-cobalt alloy, is fixedly connected to the bottom side of the positioning blocks 9 to prevent wear from repeated disassembly and reassembly, extending the service life of the components. A reinforcing ring 12 is fitted outside the annular sleeve 2, with its bottom fixedly connected to the top of the mounting base 8. During airbag operation, the reinforcing ring 12 protects the entire filter element structure from deformation, improving the filter element's service life and enabling it to operate stably under complex environments such as high temperature and high pressure.

[0030] Working principle: When the airbag is activated, the high-temperature gas first undergoes initial diversion through the round holes 3 on the side wall of the annular sleeve 2. The flow-guiding coating 7 on the surface of the coarse-pore woven mesh 4 guides the gas to diffuse evenly, while larger metal fragments and impurities are blocked by the coarse-pore mesh. The gas then passes through the fine-pore woven mesh 6, just like passing through a finer mesh, firmly intercepting tiny particles. The annular reinforcing rib 5 in the middle acts like a support to open up the filter screen, preventing the mesh from collapsing and leaving a smooth channel for the gas, thus improving the overall filtration efficiency of the filter element.

[0031] Positioning block 9 ensures a tight fit between the filter element and the airbag device. Wear-resistant layer 11 prevents wear during repeated disassembly and assembly. When high-temperature gas flows through, sealing ring 10 expands slightly due to heat and automatically fills the gap to prevent gas leakage. External corrugated reinforcing ring 12 can automatically expand and contract according to temperature changes, absorbing the stress of vibration and thermal expansion and contraction like a spring, protecting the entire structure from deformation, improving the service life of the filter element, and maintaining stable working performance under high temperature and high pressure environments.

[0032] 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 mesh for an airbag filter element, comprising a top shell (1), characterized in that: The bottom end of the top shell (1) is fixedly connected to an annular sleeve (2). The annular sleeve (2) has a plurality of circular holes (3) evenly opened in the circumferential direction inside. The inner wall of the annular sleeve (2) is fixedly connected to a coarse-hole woven mesh (4). The inner wall of the coarse-hole woven mesh (4) is fixedly connected to a plurality of annular reinforcing ribs (5). The inner wall of the plurality of annular reinforcing ribs (5) is fixedly connected to a fine-hole woven mesh (6). The outer wall of the coarse-hole woven mesh (4) is coated with a flow-guiding coating (7). The bottom end of the annular sleeve (2) is fixedly connected to a positioning component for easy assembly.

2. The metal braided mesh for an airbag filter element according to claim 1, characterized in that: The positioning component includes a mounting base (8), the top of which is fixedly connected to the bottom of the annular sleeve (2), and positioning blocks (9) are fixedly connected to the four corners of the bottom of the mounting base (8). The positioning blocks (9) are trapezoidal in shape.

3. The metal braided mesh for an airbag filter element according to claim 1, characterized in that: The top end of the coarse-mesh woven mesh (4) is fixedly connected to the bottom end of the top shell (1), the top end of the fine-mesh woven mesh (6) is fixedly connected to the bottom end of the top shell (1), the material of the annular sleeve (2) is 304 stainless steel with aluminum plating, and the material of the annular reinforcing rib (5) is nickel-chromium alloy.

4. The metal braided mesh for an airbag filter element according to claim 1, characterized in that: The coarse-hole woven mesh (4) and the fine-hole woven mesh (6) are both made of 316L stainless steel wire, and the flow-guiding coating (7) is made of composite ceramic coating.

5. The metal braided mesh for an airbag filter element according to claim 2, characterized in that: A sealing ring (10) is fixedly connected to the bottom end of the mounting base (8), and a wear-resistant layer (11) is fixedly connected to the bottom side of the positioning block (9). The wear-resistant layer (11) is made of tungsten-cobalt alloy.

6. The metal braided mesh for an airbag filter element according to claim 2, characterized in that: The annular sleeve (2) is fitted with a reinforcing ring (12), and the bottom end of the reinforcing ring (12) is fixedly connected to the top end of the mounting base (8).

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