Exhaust assembly and gas generator

Abstract

The utility model relates to a gas generator technical field, more particularly, relate to a kind of exhaust assembly and gas generator.Exhaust assembly includes exhaust main body and filter unit;Exhaust main body is hollow, and including continuous first subsection and second subsection, exhaust main body is equipped with at least one exhaust hole with first subsection intercommunication, and equipped with at least one air inlet with second subsection intercommunication;Filter unit is housed in first subsection.The exhaust assembly is applied to gas generator, its structure is simple, installation is easy to use, can reduce assembly step, and reduce the procedure of welding, to improve assembly efficiency, reduce manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of gas generator technology, and more specifically, to an exhaust assembly and a gas generator. Background Technology

[0002] With increasingly stringent regulations and technical requirements in the automotive industry in recent years, the market for automotive airbags has been gradually expanding, with side airbags and side curtain airbags becoming increasingly common in vehicles. Among these, side airbags are the most widely used airbags after driver and passenger airbags; these airbags are placed within the driver and passenger seats to protect the chest and lower back of occupants. However, existing gas generators have complex exhaust components that require repeated welding, hindering lightweight design and resulting in higher costs. Utility Model Content

[0003] The purpose of this invention is to provide an exhaust assembly and a gas generator, which have a simple structure, are easy to install and use, reduce assembly steps and welding processes, thereby improving assembly efficiency and reducing manufacturing costs.

[0004] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides an exhaust assembly, which includes an exhaust body and a filter unit; The exhaust body is hollow and includes a continuous first section and a second section. The exhaust body has at least one exhaust port communicating with the first section and at least one air inlet port communicating with the second section. The filter unit is housed within the first section.

[0005] In an optional implementation, the inner diameter of the first segment is larger than the diameter of the second segment, and both ends of the exhaust body are closed.

[0006] In an optional embodiment, the outer periphery of the first segment is provided with a plurality of exhaust holes around the axis of the exhaust body, and the outer periphery of the second segment is provided with a plurality of air inlets.

[0007] Secondly, this utility model provides a gas generator, which includes a main body, an ignition assembly, and the aforementioned exhaust assembly. The main pipe is used to contain the gas-generating agent, and the ignition assembly and exhaust assembly are connected to both ends of the main pipe.

[0008] In an optional embodiment, the outer diameter of the second segment is smaller than the outer diameter of the first segment, and the outer diameter of the second segment is smaller than the inner diameter of the main body; The second section is located within the main body, at least a portion of the first section extends into the main body, and the air inlet connects the interior of the second section with the interior of the main body.

[0009] In an optional embodiment, the gas generator further includes an elastic element, the two ends of which abut against the ignition assembly and the gas-generating agent located in the main body, respectively.

[0010] In an optional embodiment, the elastic element includes a first spring, the two ends of which respectively abut against the ignition assembly and the gas-generating agent located in the main body. Alternatively, the elastic element includes a second spring and a stop plate, with one end of the second spring connected to the stop plate.

[0011] In an optional embodiment, the ignition assembly includes an igniter, a mounting base, and a sealing ring; The igniter is connected to the mounting base, and a sealing ring is placed between the igniter or mounting base and the main body.

[0012] In an optional embodiment, the ignition assembly further includes a filler or an injection-molded part; The igniter is connected to the mounting base via a filler or injection-molded part.

[0013] In optional embodiments, the gas-generating agent includes cylindrical tablets, spherical tablets, or hollow cylindrical tablets.

[0014] The beneficial effects of the exhaust assembly and gas generator provided in this embodiment of the present invention include: The exhaust assembly includes an exhaust body and a filter unit. The exhaust body is hollow and includes a continuous first section and a second section. The exhaust body has at least one exhaust port communicating with the first section and at least one air inlet port communicating with the second section. The filter unit is housed within the first section. This exhaust assembly is used in gas generators. It has a simple structure, is easy to install and use, and can reduce assembly steps and welding processes, thereby improving assembly efficiency and reducing manufacturing costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the exhaust assembly provided in this embodiment; Figure 2 This is a schematic diagram of the gas generator provided in this embodiment; Figure 3 This is a schematic diagram of the structure of the ignition assembly provided in this embodiment; Figure 4 This is a schematic diagram of the gas-generating agent provided in this embodiment; Figure 5 This is a schematic diagram of the elastic element provided in this embodiment.

[0017] Icons: 100-Exhaust assembly; 110-Exhaust body; 120-Filter unit; 111-First section; 112-Second section; 113-Exhaust port; 114-Inlet port; 200-Gas generator; 210-Main body; 220-Ignition assembly; 230-Gas generating agent; 240-Elastic element; 241-First spring; 242-Second spring; 243-Baffle; 221-Igniter; 222-Mounting base; 223-Sealing ring; 224-Filling element. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0023] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0024] Please refer to Figure 1 and Figure 2 An exhaust assembly 100 includes an exhaust body 110 and a filter unit 120. The exhaust body 110 is hollow and includes a continuous first segment 111 and a second segment 112. The exhaust body 110 has at least one exhaust port 113 communicating with the first segment 111 and at least one air inlet port 114 communicating with the second segment 112. The filter unit 120 is housed within the first segment 111.

[0025] It should be noted that the second segment 112 can also be used to contain the gas-generating agent 230.

[0026] Please refer to Figure 1 and Figure 2 The working principle of the exhaust assembly 100 is as follows: First, the exhaust assembly 100 is used in the gas generator 200, and its function is to filter the generated gas and discharge the filtered gas. The exhaust assembly 100 includes an exhaust body 110 and a filter unit 120. The exhaust body 110 is hollow and includes a continuous first segment 111 and a second segment 112. The exhaust body 110 has at least one exhaust port 113 communicating with the first segment 111 and at least one air inlet port 114 communicating with the second segment 112. The filter unit 120 is housed in the first segment 111. Thus, by this arrangement, the filter unit 120 is placed inside the exhaust body 110. Due to the segmented arrangement of the exhaust body 110, the installation of the filter unit 120 is convenient, thereby integrating the exhaust body 110 and the filter unit 120 into a single structure. The exhaust body 110 is then connected to the main body 210 of the gas generator 200. Thus, by connecting the filter unit 120 to the exhaust body 110, and then connecting the exhaust body 110 to the main pipe 210, the filter unit 120 can be installed, thereby simplifying the installation steps. In summary, the exhaust assembly 100 is applied to the gas generator 200. It has a simple structure, is easy to install and use, and can reduce assembly steps and welding processes, thereby improving assembly efficiency and reducing manufacturing costs.

[0027] Further, please refer to Figure 1 and Figure 2In this embodiment, when configuring the exhaust body 110, the inner diameter of the first segment 111 is larger than the diameter of the second segment 112, and both ends of the exhaust body 110 are closed. The purpose of this configuration is to allow the exhaust body 110 to have a variable diameter, thereby forming a stepped structure at the boundary between the first segment 111 and the second segment 112. This allows one end of the filter unit 120 located in the first segment 111 to abut against the stepped structure, thereby limiting the position of the filter unit 120. Therefore, this configuration allows the filter unit 120 to be installed through the structure of the exhaust body 110. Moreover, this installation method uses the variable diameter of the exhaust body to form a stepped structure, which serves to fix the filter unit 120. This eliminates the need for welding to fix the filter unit 120, thereby improving its installation efficiency.

[0028] Furthermore, when configuring the exhaust body 110, after installing the filter unit 120, its two ends are sealed. In addition, when manufacturing the exhaust body 110, after setting it into a first segment 111 and a second segment 112 with different diameters, after installing the filter unit 120 into the exhaust body 110, the filter unit 120 can be positioned, and then its open end is sealed, thereby sealing both ends of the exhaust body 110.

[0029] It should be noted that, please refer to Figure 1 and Figure 2 In this embodiment, the exhaust body 110 is designed with one end open and the other end closed, and the open end is one end of the first segment 111. The purpose is to facilitate the installation of the filter unit 120 into the first segment 111. After the filter unit 120 is installed, its open end can be closed. The sealing method can be heat sealing or other process structures.

[0030] Furthermore, in configuring the air intake 114 and the exhaust 113, this embodiment adopts a configuration where, around the axis of the exhaust body 110, the outer periphery of the first segment 111 is provided with a plurality of exhaust 113, and the outer periphery of the second segment 112 is provided with a plurality of air intake 114.

[0031] Furthermore, based on the exhaust assembly 100 described above, please refer to... Figures 1-5 This embodiment also provides a gas generator 200, which includes a main body 210, an ignition assembly 220 and the exhaust assembly 100 described above. The main body 210 is used to contain the gas-generating agent 230, the ignition assembly 220 and the exhaust assembly 100 connected to both ends of the main body 210.

[0032] By employing an exhaust assembly 100, the gas generator 200 can reduce assembly steps and welding processes during assembly by filling its main body 210 with a gas-generating agent 230 and installing an ignition assembly 220 and an exhaust assembly 100 at its two ends, thereby improving assembly efficiency and reducing manufacturing costs.

[0033] Furthermore, when installing the exhaust assembly 100, in order to enable the exhaust body 110 to be assembled with the main pipe body 210, the outer diameter of the second segment 112 is smaller than the outer diameter of the first segment 111, and the outer diameter of the second segment 112 is smaller than the inner diameter of the main pipe body 210. Thus, the second segment 112 is located inside the main pipe body 210, at least a portion of the first segment 111 extends into the main pipe body 210, and the air inlet 114 communicates the interior of the second segment 112 with the interior of the main pipe body 210.

[0034] Furthermore, the gas-generating agent 230 may include cylindrical tablets (such as...) Figure 4 As shown in A), spherical tablets (such as...) Figure 4 (as shown in B) or hollow cylindrical tablets (such as...) Figure 4 (As shown in C). Within the main body 210, the gas generator 200 also includes an elastic element 240, with its two ends respectively abutting against the ignition assembly 220 and the gas-generating agent 230 located within the main body 210. In an optional embodiment, the elastic element 240 includes a first spring 241 (e.g., ...). Figure 4 As shown in D), the two ends of the first spring 241 abut against the ignition assembly 220 and the gas-generating agent 230 located in the main body 210, respectively; or, the elastic element 240 includes a second spring 242 and a baffle 243 (as shown in D). Figure 4 As shown in E), one end of the second spring 242 is connected to the baffle 243. The purpose of the elastic element 240 is to accommodate the installation of the ignition agent and maintain its position within the main body 210.

[0035] Further, please refer to Figures 1-5In this embodiment, to improve the assembly efficiency of the gas generator 200, the ignition assembly 220 includes an igniter 221, a mounting base 222, and a sealing ring 223. The igniter 221 is connected to the mounting base 222, and the sealing ring 223 is disposed between the contact surface of the igniter 221 or the mounting base 222 and the main body 210. Furthermore, the ignition assembly 220 also includes a filler 224 or an injection-molded part; the igniter 221 is connected to the mounting base 222 via the filler 224 or the injection-molded part. Thus, in this way, the igniter 221 and the mounting base 222 can be integrated into one unit via the filler 224 or the injection-molded part, thereby enabling combination with the aforementioned exhaust assembly 100. This makes both the exhaust assembly 100 and the ignition assembly 220 modular structures, thereby improving assembly efficiency.

[0036] It should also be noted that, based on the above structure, the second segment 112 can also be used to accommodate the gas-generating agent 230. Furthermore, since the main body 210 contains the gas-generating agent 230, the gas generator 200 can thus be a two-stage gas-generating structure. The first-stage gas-generating structure is the gas-generating agent 230 within the main body 210, and the second-stage gas-generating structure is the gas-generating agent 230 within the second segment 112. The working principle of this two-stage gas-generating method is as follows: when the ignition assembly 220 is activated, the gas-generating agent 230 in the first-stage combustion system is rapidly ignited and begins to burn. The combustion gas enters the filter unit 120 through the second-stage combustion, and finally fills the airbag through the exhaust port 113 of the exhaust assembly 100, thereby achieving the purpose of protecting passengers. Thus, a secondary space can be created inside the generator. Through the second-stage combustion system, the flow rate of the combustion gas is reduced, and through the filter assembly, residue is precipitated, resulting in less residue being discharged from the generator, which is more beneficial to the airbag.

[0037] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. An exhaust assembly, characterized in that: The exhaust assembly includes an exhaust body and a filter unit; The exhaust body is hollow and includes a continuous first segment and a second segment. The exhaust body has at least one exhaust port communicating with the first segment and at least one air inlet port communicating with the second segment. The filtering unit is housed within the first segment.

2. The exhaust assembly according to claim 1, characterized in that: The inner diameter of the first segment is larger than the diameter of the second segment, and both ends of the exhaust body are closed.

3. The exhaust assembly according to claim 1, characterized in that: Around the axis of the exhaust body, the outer periphery of the first segment is provided with a plurality of exhaust holes, and the outer periphery of the second segment is provided with a plurality of air inlets.

4. A gas generator, characterized in that: The gas generator includes a main body, an ignition assembly, and an exhaust assembly as described in any one of claims 1-3; The main pipe is used to contain the gas-generating agent, and the ignition assembly and the exhaust assembly are connected to both ends of the main pipe.

5. The gas generator according to claim 4, characterized in that: The outer diameter of the second segment is smaller than the outer diameter of the first segment, and the outer diameter of the second segment is smaller than the inner diameter of the main body; The second segment is located within the main body, at least a portion of the first segment extends into the main body, and the air inlet communicates the interior of the second segment with the interior of the main body.

6. The gas generator according to claim 4, characterized in that: The gas generator also includes an elastic element, the two ends of which abut against the ignition assembly and the gas-generating agent located in the main body, respectively.

7. The gas generator according to claim 6, characterized in that: The elastic element includes a first spring, the two ends of which respectively abut against the ignition assembly and the gas-generating agent located in the main body; Alternatively, the elastic element may include a second spring and a stop plate, with one end of the second spring connected to the stop plate.

8. The gas generator according to claim 4, characterized in that: The ignition assembly includes an igniter, a mounting base, and a sealing ring; The igniter is connected to the mounting base, and the sealing ring is disposed between the contact surface of the igniter or the mounting base and the main body.

9. The gas generator according to claim 8, characterized in that: The ignition assembly also includes a filler or injection-molded part; The igniter is connected to the mounting base via the filler or the injection molded part.

10. The gas generator according to claim 4, characterized in that: The gas-generating agent includes cylindrical tablets, spherical tablets, or hollow cylindrical tablets.

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