Pyrotechnic type gas generator

Abstract

The utility model discloses a firework type gas generator which comprises a bearing cylinder, a gas outlet end cover fixedly connected to the top end of the inner side of the bearing cylinder, a gas guide end cover fixedly connected to the outer side of the top end of the bearing cylinder, a gas guide hole formed in the top end of the gas guide end cover, and a detachable gas distribution assembly arranged at the top end of the bearing cylinder. The bearing cylinder is internally provided with an air distribution assembly, the air distribution assembly is used for providing air for the safety air bag, the bearing cylinder is internally provided with an air supply assembly, the air supply assembly is used for generating air flow, and the air distribution assembly comprises an air supply end cover, a flow guide slope, an air distribution through hole and a stability maintaining protrusion. Through the arrangement of the stability maintaining protrusions, the air supply end cover and the bearing cylinder can be conveniently and rapidly assembled, the assembling efficiency of the air supply end cover is greatly improved, meanwhile, the air flow entering the air supply end cover can be guided in cooperation with the arrangement of the flow guiding gradient, impact on the air supply end cover is reduced, and the service life of the air supply end cover is prolonged. And the gas transmission efficiency of the gas distribution through holes can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas generator, specifically is a pyrotechnic gas generator. BACKGROUND

[0002] The pyrotechnic gas generator is a kind of equipment using pyrotechnic explosion principle to generate high-pressure gas, it is mainly used to provide the gas pressure required for safety air bag, in the process of automobile collision, air bag will swell rapidly, absorb impact;

[0003] However, the end cover for supplying gas to safety air bag in the pyrotechnic gas generator in traditional technology is realized by welding when assembling, and the process is relatively complex.

[0004] Therefore, the utility model provides a pyrotechnic gas generator, the end cover for supplying gas to safety air bag is assembled by the way of rolling and pressing, effectively simplifies the process, and improves the equipment efficiency, to solve the above problems. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of prior art, the utility model provides a pyrotechnic gas generator, which solves the above problems.

[0006] To achieve the above object, the utility model is realized by the following technical scheme: a pyrotechnic gas generator, including bearing cylinder, the top of the inner side of bearing cylinder is fixedly connected with the gas outlet end cover, the outer side of the top of bearing cylinder is fixedly connected with the gas guide end cover, the top of gas guide end cover is provided with gas guide hole, the top of bearing cylinder is provided with detachable gas distribution assembly, the gas distribution assembly is used to provide gas to safety air bag, the inside of bearing cylinder is provided with gas supply assembly, and the gas supply assembly is used to generate airflow.

[0007] Preferably, the gas distribution assembly includes gas supply end cover, flow guide slope, gas distribution hole and stability protrusion, the inner diameter of gas supply end cover is same with the outer diameter of gas guide end cover, the middle of the top of gas supply end cover is concave downward to form flow guide slope, a plurality of gas distribution holes are uniformly arranged on the outer side of gas supply end cover, the bottom of the outer side of gas supply end cover is provided with stability protrusion, the inner diameter of the corresponding position of gas supply end cover and stability protrusion is same with the outer diameter of bearing cylinder, the bottom of gas supply end cover is fixedly connected with quick mounting plate, and quick mounting hole is formed in the four end angles of quick mounting plate.

[0008] Preferably, the gas supply assembly comprises an igniter body, a booster tube, an electric detonator body and a booster charge, a filling cavity is formed between the bottom end of the gas outlet end cover and the bearing cylinder, the igniter body is fixedly connected to the bottom end inside the filling cavity, the filling cavity is filled with gunpowder, the middle part of the inside of the filling cavity is fixedly connected with the booster tube, the middle part of the bottom end of the gas outlet end cover is provided with the electric detonator body, and the output end of the electric detonator body extends to the inside of the booster tube, the inside of the booster tube is filled with the booster charge, and a plurality of interconnected holes are formed in the outside of the booster tube.

[0009] Preferably, the inside of the gas guide hole is welded with a rupture disc. By welding the rupture disc on the gas guide hole, the problem that moisture enters the humid gas generating agent due to the loose connection between the rupture disc and the upper shell, causing the safety air bag to fail, is avoided. In the utility model, the safety air bag is thicker than that used before, and the welding between the upper shell and the safety air bag can be realized. At the same time, a relatively thin blasting part is arranged at the position corresponding to the gas guide hole, so that the use requirement of the gas blasting rupture disc is met.

[0010] Preferably, the material of the gas supply end cover is deformation plastic, and the stability protrusion is integrally formed with the gas supply end cover.

[0011] Preferably, the cross-sectional shape of the stability protrusion is a circular arc, and the stability protrusion is fixedly connected with an anti-skid ring on one side in the inside of the gas supply end cover.

[0012] Preferably, the inside of the gas outlet end cover is filled with a filter core, and a plurality of gas outlet holes are formed in the top end of the gas outlet end cover.

[0013] Beneficial effects

[0014] The utility model provides a pyrotechnic gas generator. Compared with the prior art, the following beneficial effects are achieved:

[0015] The pyrotechnic gas generator, through the setting of the stability protrusion, can conveniently assemble the gas supply end cover and the bearing cylinder, greatly improves the assembly efficiency of the gas supply end cover, and cooperates with the setting of the flow guide slope to guide the airflow entering the gas supply end cover, reduces the impact on the gas supply end cover, and ensures the gas transmission efficiency of the gas distribution hole.

[0016] The pyrotechnic gas generator, through the structure cooperation of the gas supply assembly, can utilize the simultaneous operation of the igniter body and the electric detonator body, so that the safety air bag is more rapid, and compared with the traditional technology, the size is larger, and can be applied to the installation and use of large air bags. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the schematic diagram of the utility model;

[0018] Figure 2It is the half-split structure schematic diagram of the utility model;

[0019] Figure 3 It is the structure explosion drawing of the utility model;

[0020] Figure 4 It is the structure schematic diagram of the gas distribution assembly of the utility model;

[0021] Figure 5 It is the structure schematic diagram of the gas supply assembly of the utility model.

[0022] In the figure, 1, bearing cylinder;2, gas outlet end cover;3, gas guide end cover;4, gas guide hole;5, gas supply end cover;6, flow guide slope;7, gas distribution through hole;8, stability protrusion;9, quick mounting plate;10, quick mounting through hole;11, gas supply assembly;12, filling cavity;13, igniter main body;14, booster tube;15, electric detonation tube main body;16, booster explosive;17, interconnection hole;18, impurity filter element;19, gas outlet hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Embodiment one:

[0025] Please refer to Figures 1-5 A pyrotechnic gas generator, comprising a bearing cylinder 1, the top end of the inner side of the bearing cylinder 1 is fixedly connected with a gas outlet end cover 2, the outer side of the top end of the bearing cylinder 1 is fixedly connected with a gas guide end cover 3, the top end of the gas guide end cover 3 is provided with a gas guide hole 4, the top end of the bearing cylinder 1 is provided with a detachable gas distribution assembly, the gas distribution assembly is used for providing gas to a safety air bag, the inside of the bearing cylinder 1 is provided with a gas supply assembly 11, and the gas supply assembly 11 is used for generating airflow;

[0026] In the embodiment, the gas guide end cover 3 and the gas supply end cover 5 are both made through a rolling and pressing process, compared with the traditional welding mode, the process is effectively simplified, and the equipment efficiency is improved;

[0027] The gas distribution assembly comprises a gas supply end cover 5, a flow guide slope 6, a gas distribution hole 7 and a stability protrusion 8. The inner diameter of the gas supply end cover 5 is the same as the outer diameter of the gas guide end cover 3. The middle part of the top end of the gas supply end cover 5 is concave downward to form the flow guide slope 6. A plurality of gas distribution holes 7 are uniformly arranged on the outer side of the gas supply end cover 5. The bottom end of the outer side of the gas supply end cover 5 is provided with a stability protrusion 8. The inner diameter of the corresponding position of the gas supply end cover 5 and the stability protrusion 8 is the same as the outer diameter of the bearing cylinder 1. The bottom end of the gas supply end cover 5 is fixedly connected with a quick mounting plate 9. Quick mounting holes 10 are arranged at the four corners of the quick mounting plate 9.

[0028] In this embodiment, the bearing cylinder 1 and the gas guide end cover 3 are connected by laser welding or friction welding.

[0029] Preferably, the inside of the gas guide hole 4 is welded with a rupture piece. Under normal circumstances, the rupture piece can be used to block the gas guide hole 4. When the gas supply assembly 11 is activated, the gas in the filling cavity 12 will break the rupture piece and be discharged through the gas distribution hole 7.

[0030] Further, the material of the gas supply end cover 5 is deformation plastic, and the stability protrusion 8 is integrally formed with the gas supply end cover 5. By using the material characteristics of the gas supply end cover 5, when the stability protrusion 8 contacts the surface of the gas guide end cover 3, the gas supply end cover 5 can be expanded until the stability protrusion 8 passes through the gas guide end cover 3 and is attached to the outer wall of the bearing cylinder 1.

[0031] In more detail, the cross-sectional shape of the stability protrusion 8 is a circular arc. A non-slip ring is fixedly connected to one side of the stability protrusion 8 inside the gas supply end cover 5. By using the shape characteristics of the stability protrusion 8, the contact between the stability protrusion 8 and the gas guide end cover 3 is smoother. In this embodiment, the top end of the outer side of the gas guide end cover 3 is provided with a circular arc surface.

[0032] Further, the inside of the gas outlet end cover 2 is filled with a foreign matter blocking filter element 18. A plurality of gas outlet holes 19 are arranged at the top end of the gas outlet end cover 2. By arranging the foreign matter blocking filter element 18, the impurities in the gas flow of the gas outlet end cover 2 can be blocked to prevent the impurities from entering the safety airbag. In combination with the arrangement of the gas outlet holes 19, the gas in the filling cavity 12 can be uniformly guided out.

[0033] Embodiment two:

[0034] Please refer to Figures 2-5The embodiment provides a technical scheme on the basis of the embodiment one: the air supply assembly 11 comprises a igniter main body 13, a booster tube 14, an electric detonator main body 15 and a booster explosive 16, a filling cavity 12 is formed between the bottom end of the air outlet end cover 2 and the bearing cylinder 1, the bottom end inside the filling cavity 12 is fixedly connected with the igniter main body 13, the filling cavity 12 is filled with gunpowder, the middle part of the inside of the filling cavity 12 is fixedly connected with the booster tube 14, the middle part of the bottom end of the air outlet end cover 2 is provided with the electric detonator main body 15, and the output end of the electric detonator main body 15 extends to the inside of the booster tube 14, the inside of the booster tube 14 is filled with the booster explosive 16, and a plurality of interconnecting holes 17 are formed in the outside of the booster tube 14.

[0035] Here, the working principle of the igniter main body 13 is the same as that in the conventional technology, which is mature prior art, and will not be repeated here.

[0036] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0037] Working principle, first, cover the air supply end cover 5 outside the air guide end cover 3, and press the air supply end cover 5 downward, so that the stability protrusion 8 is in contact with the outer wall of the air guide end cover 3, because the inner diameter of the air supply end cover 5 at the corresponding position of the stability protrusion 8 is smaller than the outer diameter of the air guide end cover 3, when the air supply end cover 5 continues to press down, the stability protrusion 8 can be deformed, until the air supply end cover 5 can continue to press down, and when the stability protrusion 8 passes through the air guide end cover 3, because the stability protrusion 8 loses extrusion, the structure characteristics of the air supply end cover 5 will make the stability protrusion 8 reset and tightly fit with the outer wall of the air outlet end cover 2, so as to realize the rapid installation of the air supply end cover 5, then the connecting piece is inserted through the quick mounting through hole 10, and the whole can be positioned at the specified position in the car.

[0038] When the vehicle is hit, the car sends an instruction to the igniter main body 13 and the electric detonator main body 15, so that the igniter main body 13 and the electric detonator main body 15 operate at the same time, the operation of the igniter main body 13 can ignite the gunpowder in the filling cavity 12, and the operation of the electric detonator main body 15 can excite the booster explosive 16, so that the gas in the booster tube 14 is generated, the gas in the booster tube 14 is sent to the inside of the filling cavity 12 through the interconnecting hole 17, then the gas is filtered through the blocking filter element 18, and then is discharged into the air guide end cover 3 through the air outlet hole 19, after the airflow breaks the rupture disc on the air guide hole 4, the airflow can be sent to the inside of the gas distribution through hole 7, and through the setting of the flow guide slope 6, the airflow entering the gas distribution through hole 7 can be received and guided, so as to reduce the pressure when the airflow contacts the air supply end cover 5, and finally the airflow is injected into the safety air bag through the gas distribution through hole 7, so that the safety air bag is inflated.

[0039] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0040] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A pyrotechnic gas generator, characterized by: The utility model provides an air supply device for air bag, including the bearing cylinder (1), the top fixedly connected with the air outlet end cover (2) inside the bearing cylinder (1), the outside fixedly connected with the air guide end cover (3) of bearing cylinder (1) top, the top of air guide end cover (3) is equipped with air guide hole (4), the top of bearing cylinder (1) is provided with detachable gas distribution assembly, and the gas distribution assembly is used to provide gas for air bag, and the inside of bearing cylinder (1) is provided with gas supply assembly (11), and the gas supply assembly (11) is used to generate airflow.

2. The pyrotechnic gas generator according to claim 1, characterized in that: The utility model discloses an air supply device for air bag, including the bearing cylinder (1), the top fixedly connected with the air outlet end cover (2) inside the bearing cylinder (1), the outside fixedly connected with the air guide end cover (3) of bearing cylinder (1) top, the top of air guide end cover (3) is equipped with air guide hole (4), the top of bearing cylinder (1) is provided with detachable gas distribution assembly, and the gas distribution assembly is used to provide gas for air bag, and the inside of bearing cylinder (1) is provided with gas supply assembly (11), and the gas supply assembly (11) is used to generate airflow.

3. The pyrotechnic gas generator according to claim 1, characterized in that: The utility model discloses an air supply device for air bag, including the bearing cylinder (1), the top fixedly connected with the air outlet end cover (2) inside the bearing cylinder (1), the outside fixedly connected with the air guide end cover (3) of bearing cylinder (1) top, the top of air guide end cover (3) is equipped with air guide hole (4), the top of bearing cylinder (1) is provided with detachable gas distribution assembly, and the gas distribution assembly is used to provide gas for air bag, and the inside of bearing cylinder (1) is provided with gas supply assembly (11), and the gas supply assembly (11) is used to generate airflow.

4. The pyrotechnic gas generator according to claim 1, characterized in that: The inside of air guide hole (4) is welded.

5. The pyrotechnic gas generator according to claim 2, characterized in that: The material of gas supply end cover (5) is deformation plastic, and the stability protruding part (8) is integrally formed with gas supply end cover (5).

6. A pyrotechnic gas generator according to claim 5, characterized in that: The cross section shape of stability protruding part (8) is circular arc, and the one side fixedly connected with anti -skid ring in the inside of gas supply end cover (5) of stability protruding part (8).

7. The pyrotechnic gas generator according to claim 3, characterized in that: The inside of air outlet end cover (2) is filled with blocking filter core (18), and the top of air outlet end cover (2) is equipped with a plurality of air outlet holes (19).

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