Gas guide assembly of columnar gas generator

Abstract

A columnar gas generator gas guide assembly comprises a gas generator which is in a stepped shaft shape, and circumferentially distributed gas outlets are formed in a first column body with the smallest diameter of the gas generator, and is characterized in that a flow guide sleeve is fixedly arranged at one end of the gas outlet on the gas generator in a sleeving manner; one end of the flow guide sleeve is closed and forms a flow guide cavity with the first column body; a plurality of axial flow guide holes are formed in the closed end of the flow guide sleeve, a plurality of radial flow guide holes are formed in one side of the circumferential outer wall of the flow guide sleeve, flow guide pieces are fixed to the side, corresponding to the radial flow guide holes, of the outer wall of the flow guide sleeve, the flow guide pieces form an arc-shaped flow guide groove, and an included angle is formed between the flow guide pieces and the axis of the flow guide sleeve and used for guiding out gas entering the flow guide cavity. The device has the advantages that the air bag can be effectively protected and prevented from being damaged due to impact of high-temperature and high-pressure air, and meanwhile the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to a gas guide component, in particular to a columnar gas generator gas guide component. Technical Background

[0002] Airbags are important components of automobile safety systems and are safety devices that provide collision protection for passengers. Columnar gas generators are an important part of the airbag module assembly and are usually used in curtain airbags installed on the side rails of the vehicle, the inner side of the ceiling interior, or side airbags and distal airbags installed in the seat backs. The gas outlet structure of the gas generator is usually arranged inside the airbag of the airbag. When the vehicle collides with an obstacle from the side during driving, the airbag system is activated, the gas generator is activated, and gas is quickly generated into the airbag, causing the airbag to pop out instantly and expand to form a flexible body with a cushioning effect, which is used to protect the heads and upper limbs of the front and rear passengers in the vehicle and reduce the impact of the collision.

[0003] The gas outlet structure of the cylindrical gas generator is generally distributed at the axial end, and is formed by multiple radial gas outlet holes distributed around the circumference of the cylinder, so that the gas flows out of the gas generator in the radial direction. In order to solve the thrust balance during the gas outlet process, the gas outlet holes are usually evenly distributed along the circumference. When this type of gas generator inflates the airbag in the airbag, the radially outflowing gas has a strong impact force and heat load. The bag body of the airbag must be protected from the impact force and heat load to avoid damage to the airbag and additional harm to the occupants.

[0004] At present, the conventional airbag is equipped with a special fabric airbag assembly inside. This airbag assembly is made of multi-layered bags made of heat-resistant and impact-resistant fabrics sewn with high-strength sewing threads. The gas generator is wrapped inside the airbag assembly, which can not only protect the main structure of the airbag, but also guide the airflow into the airbag, so that the various parts of the airbag can be deployed effectively and quickly. However, this fabric airbag structure has high cost and long manufacturing cycle, resulting in high manufacturing cost of the entire airbag. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a columnar gas generator gas guide component which can effectively protect the air bag and prevent it from being damaged by the impact of high-temperature and high-pressure gas, while reducing the manufacturing cost.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A columnar gas generator gas guide assembly, comprising a gas generator, the gas generator is in the shape of a stepped shaft, and a first column with the smallest diameter is provided with circumferentially distributed gas outlet holes, and the special feature is that: a guide sleeve is fixedly provided at one end of the gas outlet hole on the gas generator, one end of the guide sleeve is closed and a guide cavity is formed between the first column;

[0008] A plurality of axial guide holes are provided at the closed end of the guide sleeve, and a plurality of radial guide holes are provided on one side of the circumferential outer wall thereof. A guide vane is fixed on the side of the outer wall of the guide sleeve corresponding to the radial guide holes. The guide vane forms an arc-shaped guide groove and forms an angle with the axis of the guide sleeve for guiding the gas entering the guide cavity.

[0009] As a further preference, an annular crimping groove is provided along the circumferential direction on the second column adjacent to the first column on the gas generator, and the guide sleeve is plugged into the second column through a tight fit and is clamped in the crimping groove through spinning.

[0010] As a further preference, an open end of the guide sleeve is in contact with a shoulder of the second column.

[0011] As a further preference, an outer edge of a second column adjacent to the first column on the gas generator is provided with an external thread, and the guide sleeve is connected to the second column via threads.

[0012] As a further preference, the guide plate is a two-section arc-shaped structure punched from sheet material, wherein one arc section is fixedly attached to the outer wall of the guide sleeve, and the other arc section forms the guide groove for shielding the gas discharged from the radial guide hole.

[0013] As a further preference, the included angle between the axis of the guide groove and the guide sleeve is 50 degrees.

[0014] As a further preference, the diameter of the axial guide hole is larger than the diameter of the radial guide hole, so as to achieve a distribution ratio of front and rear air outlets.

[0015] The beneficial effects of the utility model are:

[0016] 1. The gas guide assembly can be used to turn the gas discharged from the gas generator from radial direction to multiple required directions, which can not only effectively protect the air bag and prevent it from being damaged by the impact of high-temperature and high-pressure gas; but also can remove or reduce the number of bag pieces of the fabric air bag made of heat-resistant and impact-resistant fabrics or use fabrics with lower heat-resistant and impact-resistant grades, which can greatly reduce material costs and manufacturing costs.

[0017] 2. Through the air guide assembly, the gas can enter the guide cavity formed between the guide sleeve and the first column from the air outlet hole, and then be adjusted to axial directional air outlet through the axial guide hole, and the arc guide groove formed by the radial guide hole and the guide plate is adjusted to form an oblique air outlet with a certain angle with the axis of the gas generator, which plays a very good role in the deployment consistency of different areas of the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of embodiment 1 of the utility model.

[0019] Figure 2 It is a structural sectional view of embodiment 1 of the present utility model.

[0020] Figure 3 yes Figure 1 Three-dimensional structural diagram of the middle guide sleeve.

[0021] Figure 4 yes Figure 1 Three-dimensional structural diagram of the gas generator.

[0022] Figure 5 It is a structural schematic diagram of embodiment 2 of the present utility model.

[0023] Figure 6 It is a structural sectional view of embodiment 2 of the present utility model.

[0024] Figure 7 yes Figure 5 Three-dimensional structural diagram of the middle guide sleeve.

[0025] Figure 8 yes Figure 5 Three-dimensional structural diagram of the gas generator.

[0026] In the figure: gas generator 1, first cylinder 101, second cylinder 102, radial air outlet 103, crimping groove 104, guide sleeve 2, axial guide hole 201, radial guide hole 202, internal thread 203, guide cavity 3, guide plate 4, guide groove 401. DETAILED DESCRIPTION

[0027] Example 1

[0028] like Figure 1 to Figure 4 As shown, the utility model relates to a columnar gas generator gas guide assembly, including a columnar gas generator 1, the two ends of the gas generator 1 are stepped shaft-shaped, and a plurality of radial air outlet holes 103 distributed circumferentially are provided on the outer edge of one end of the first column 101 with the smallest diameter, and a guide sleeve 2 is fixedly provided on one end of the air outlet hole 103 on the gas generator 1, and the guide sleeve 2 can be formed by stretching a plate or made of a steel pipe, and one end of the guide sleeve 2 is closed and forms a guide cavity 3 with the first column 101.

[0029] An annular crimping groove 104 is provided along the circumferential direction on the second column 102 adjacent to the first column 101 on the gas generator 1, and the guide sleeve 2 is plugged into the second column 102 through a tight fit and is clamped in the crimping groove 104 by spinning, and the open end of the guide sleeve 2 is in contact with the shoulder of the second column 102, so that the axis of the guide sleeve 2 coincides with the axis of the gas generator 1.

[0030] A plurality of axial flow guide holes 201 evenly distributed around the circumference are provided at the closed end of the flow guide sleeve 2, and a plurality of radial flow guide holes 202 are provided on one side of the circumferential outer wall thereof. In this embodiment, four axial flow guide holes and four radial flow guide holes are used as an example. The diameter of the axial flow guide hole 201 is larger than the diameter of the radial flow guide hole 202 to achieve the distribution ratio of the front and rear air outlets of the airflow.

[0031] A guide plate 4 is fixed on the outer wall of the guide sleeve 2 at one side corresponding to the radial guide hole 202 . The guide plate 4 forms an arc guide groove 401 inclined to the left and forms an angle with the axis of the guide sleeve 2 for guiding the gas discharged from the radial guide hole 202 into the guide cavity 3 .

[0032] The guide plate 4 is a two-section arc-shaped structure formed by stamping a plate, one of which is fixedly attached to the outer wall of the guide sleeve 2 by welding or riveting, and the other forms the guide groove 401 for shielding the gas discharged from the radial guide hole 202. The included angle between the guide groove 401 and the axis of the guide sleeve 2 is 50 degrees.

[0033] When the vehicle collides with an obstacle during driving, the gas generated by the gas generator 1 flows out from the air outlet 103 into the guide chamber 3. A part of the gas is guided by the inner wall of the guide chamber 3 and diverted to the right to flow out to the axial guide hole 201; the other part flows out along the radial guide hole 202, and flows out at a certain angle to the axis through the guide groove 401 formed by the guide plate 4, thereby decomposing the high pressure accumulated inside the guide chamber 3, maintaining the balance of the outlet thrust, and preventing the direct radial exhaust of the gas generator 1 from causing impact damage to the airbag.

[0034] Example 2

[0035] like Figures 5 to 8 As shown, the utility model relates to a columnar gas generator gas guide assembly, including a columnar gas generator 1, the two ends of the gas generator 1 are stepped shaft-shaped, and a plurality of radial air outlet holes 103 distributed circumferentially are provided on the outer edge of one end of the first column 101 with the smallest diameter, and a guide sleeve 2 is fixedly provided on one end of the air outlet hole 103 on the gas generator 1, and one end of the guide sleeve 2 is closed to form a guide cavity 3 between the guide sleeve 2 and the first column 101.

[0036] The outer edge of the second column 102 adjacent to the first column 101 on the gas generator 1 is provided with an external thread, and the inner wall of the opening end of the guide sleeve 2 is provided with an internal thread 203, and the guide sleeve 2 is connected to the second column 102 through threads. The other structures of this embodiment are the same as those of embodiment 1, and will not be repeated in this embodiment.

[0037] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A columnar gas generator gas guide assembly, comprising a gas generator, the gas generator being in the shape of a stepped shaft, and having circumferentially distributed gas outlet holes on a first column with the smallest diameter, wherein: The gas generator is provided with a flow guide sleeve fixedly sleeved at one end of the gas outlet, one end of the flow guide sleeve is closed and forms a flow guide cavity between the first column; A plurality of axial guide holes are provided at the closed end of the guide sleeve, and a plurality of radial guide holes are provided on one side of the circumferential outer wall thereof. A guide vane is fixed on the side of the outer wall of the guide sleeve corresponding to the radial guide holes. The guide vane forms an arc-shaped guide groove and forms an angle with the axis of the guide sleeve for guiding the gas entering the guide cavity.

2. A columnar gas generator gas guide assembly according to claim 1, characterized in that: An annular crimping groove is provided on the second column adjacent to the first column on the gas generator along the circumferential direction, and the guide sleeve is plugged into the second column through tight fit and clamped in the crimping groove through spinning.

3. A columnar gas generator gas guide assembly according to claim 2, characterized in that: An open end of the guide sleeve is in contact with a shoulder of the second column.

4. The columnar gas generator gas guide assembly according to claim 1, characterized in that: An outer edge of a second column adjacent to the first column on the gas generator is provided with an external thread, and the guide sleeve is connected to the second column via threads.

5. A columnar gas generator gas guide assembly according to any one of claims 1 to 4, characterized in that: The guide plate is a two-section arc-shaped structure formed by stamping a sheet material, wherein one arc section is fixedly attached to the outer wall of the guide sleeve, and the other arc section forms the guide groove for shielding the gas discharged from the radial guide hole.

6. A columnar gas generator gas guide assembly according to claim 5, characterized in that: The included angle between the axis of the guide groove and the guide sleeve is 50 degrees.

7. A columnar gas generator gas guide assembly according to claim 1 or 6, characterized in that: The diameter of the axial guide hole is greater than the diameter of the radial guide hole, so as to achieve the distribution ratio of the front and rear air outlets.

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