Force detection system of gas generator with exhaust pipe

Abstract

The utility model discloses a force detection system of a gas generator with an exhaust pipe, which comprises a gas generator body and an exhaust pipe connected to the output end of the gas generator body, the output end of the exhaust pipe is provided with a plurality of exhaust holes, and the force detection system also comprises a cover body on which the gas generator body is arranged; the mounting frame is mounted at the bottom of the cover body and located on one side of the gas generator body; and the force value sensor is installed on the side, close to the gas generator body, of the installation frame, a dowel bar is fixed to the input end of the force value sensor, and the end of the dowel bar is connected to the output end of the exhaust pipe. According to the utility model, high-speed acquisition and high precision of force values can be realized, accurate acquisition of reaction force of the exhaust pipe of the gas generator can be realized, and real-time acquisition, storage, reading and export of data can be realized; by accurately detecting the counter-acting force of the exhaust pipe, the method can be used for optimizing the design of the exhaust pipe and preventing the exhaust pipe from deforming in the exhaust process of the generator.

Description

Technical Field

[0001] This utility model relates to the technical field of gas generators, and in particular to a force detection system with a gas generator and an exhaust pipe. Background Technology

[0002] Gas generators typically work by producing high-temperature, high-pressure gas through a chemical reaction between fuel and oxidant. The flow rate and pressure of this gas are then controlled and regulated to meet various needs. Depending on the specific requirements and application, gas generators vary in type and specifications. In the automotive industry, a gas generator usually refers to a device within an airbag system. It generates a large amount of gas to fill the space between the steering wheel and headrests during a collision, protecting passengers. This type of gas generator typically consists of gunpowder, an ignition agent, and a casing. Upon impact, it rapidly generates a large amount of gas and inflates the airbag, reducing the damage caused by the collision.

[0003] Currently, gas generators all have exhaust ports integrated into the housing. This type of exhaust design is inflexible in vehicle layout, requiring an airbag to enclose the generator. It also requires more space for installation. Furthermore, when customers adjust the gas generator's response time, they need to adjust the exhaust ports on the generator housing, but the adjustment space is limited, making it difficult to design on a platform. Therefore, to meet market demand, generators with exhaust pipes have emerged. These generators offer greater flexibility in layout and can meet different customer space requirements. In addition, by adjusting the size and distribution of the exhaust ports on the exhaust pipe connected to the generator according to different customer requirements for response speed, the required functions can be quickly achieved.

[0004] When a gas generator with an exhaust pipe ignites and emits gas, a reaction force opposite to the direction of the exhaust is generated at the exhaust position. This force acting on the exhaust pipe may cause a certain degree of deformation. Therefore, during the design phase of a gas generator with an exhaust pipe, a force detection system is used to detect the reaction force on the exhaust pipe when the generator emits gas, so as to guide the optimization design of the exhaust pipe.

[0005] Based on this, those skilled in the art have proposed a force detection system with an exhaust pipe gas generator, which provides a new solution to the above-mentioned technical problems. Utility Model Content

[0006] Therefore, it is necessary to provide a force detection system with an exhaust pipe gas generator to address the problems raised in the background art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] The force detection system with an exhaust pipe and gas generator specifically includes a gas generator body and an exhaust pipe connected to its output end. The output end of the exhaust pipe is provided with several exhaust holes, and further includes:

[0009] The gas generator body is mounted on the cover.

[0010] The mounting structure is installed at the bottom of the cover.

[0011] A force sensor is mounted on the mounting structure and located near the gas generator body. A force transmission rod is fixed to the input end of the force sensor, and the end of the force transmission rod is connected to the output end of the exhaust pipe.

[0012] A force value acquisition device is provided, with a wire connected to its input end. The end of the wire away from the force value acquisition device passes through the cover and is electrically connected to the output end of the force value sensor.

[0013] Preferably, the mounting structure includes a mounting bracket, which is mounted on the bottom of the cover and located on one side of the gas generator body, and the force sensor is mounted on the mounting bracket.

[0014] Preferably, a collar is fixed to the end of the force transmission rod, and the collar is sleeved on the outside of the exhaust pipe.

[0015] Preferably, it also includes a positioning pin, which has a positioning protrusion and the collar has a positioning groove that matches the positioning protrusion. The positioning pin is used to insert into one of the exhaust holes of the exhaust pipe to position the collar.

[0016] Preferably, the mounting structure includes an annular track one and an annular track two fixed to the bottom of the cover and located on the outer periphery of the gas generator body. A slider one is slidably connected to the outer side of the annular track one and annular track two. Positioning screws one are threaded onto the inner sides of both slider one sides to fix the position of slider one. A movable plate one is fixed to the bottom of the two sliders one. Linear guide rails one are fixed to both sides of the bottom of the movable plate one. Slider two is slidably connected to the outer side of the linear guide rails one on both sides. Positioning screws one are threaded onto the inner sides of the four corners of the bottom of slider two, located at the bottom of the linear guide rails one. Positioning screw two is used to fix the position of slider two. A mounting cover plate one is rotatably connected to the bottom outer side of slider two. Positioning screw three is threaded on the inner sides of both sides of mounting cover plate one to fix the position of mounting cover plate one. A movable plate two is fixed to mounting cover plate one. Linear guide rail two is fixed on both sides of movable plate two near one end of gas generator body. Slider three is slidably connected to the outer side of linear guide rail two on both sides. Positioning screw four is threaded on the inner side of the four corners of slider three and located on one side of linear guide rail two. The force sensor is installed on slider three.

[0017] Preferably, the slider three is rotatably connected to the mounting cover plate two on the side near the gas generator body, and the mounting cover plate two is internally threaded with positioning screws five on both sides for fixing the position of the mounting cover plate two. The force sensor is mounted on the mounting cover plate two and mounted on the slider three through the mounting cover plate two.

[0018] Preferably, the canister with explosive properties is detachably mounted at the bottom of the cover and outside the exhaust pipe, the force sensor and the mounting structure.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This utility model enables high-speed force acquisition through the setting of force sensor, force transmission rod and collar. The setting of positioning protrusion makes the force acquisition accuracy high, realizing the accurate acquisition of the reaction force of gas generator exhaust pipe. The setting of force acquisition device realizes real-time data acquisition, storage, reading and export. By accurately detecting the reaction force of exhaust pipe, it can be used to optimize exhaust pipe design and prevent exhaust pipe deformation during the generator exhaust process.

[0021] 2. The design of the installation structure of this utility model allows for adjustment of the position of the force sensor and the collar as needed, so as to adapt to the reaction force measurement of exhaust pipes of different shapes, and has good adaptability. Attached Figure Description

[0022] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the internal structure of the detonation tank of this utility model;

[0024] Figure 2 This is an axial view structural diagram of the interior of the detonation canister of this utility model;

[0025] Figure 3 This is a schematic diagram of another embodiment of the installation structure of this utility model;

[0026] Figure 4 This is a schematic diagram of the installation structure of this utility model;

[0027] Figure 5 This is an exploded view of the installation structure of this utility model;

[0028] Figure 6 This is a schematic diagram of the installation cover plate 2 and positioning screw 5 of this utility model.

[0029] The markings in the diagram are explained as follows:

[0030] 1. Cover; 2. Gas generator body; 3. Exhaust pipe; 4. Mounting bracket; 5. Force sensor; 6. Force transmission rod; 7. Collar; 8. Positioning pin; 9. Positioning protrusion; 10. Positioning groove; 11. Wire; 12. Force collector; 13. Ignition canister; 14. Circular track one; 15. Circular track two; 16. Moving plate one; 17. Linear guide rail one; 18. Slider two; 19. Positioning screw two; 20. Mounting cover plate one; 21. Positioning screw three; 22. Moving plate two; 23. Linear guide rail two; 24. Slider three; 25. Positioning screw four; 26. Slider one; 27. Positioning screw one; 28. Mounting cover plate two; 29. ​​Positioning screw five; 31. Exhaust straight pipe. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0032] Example 1

[0033] Please refer to Figure 1-6 The present invention provides a force detection system with an exhaust pipe and a gas generator, comprising a gas generator body 2 and an exhaust pipe 3 connected to its output end. This detection system can be used to detect commonly used exhaust pipe types, such as U-shaped pipes, F-shaped pipes, E-shaped pipes, straight exhaust pipes 31, irregularly shaped pipes, and Y-shaped pipes, but not limited to any one of these types. The exhaust pipe 3 has several exhaust holes at its output end, and further includes:

[0034] Cover 1, gas generator body 2 is mounted on cover 1;

[0035] The mounting structure is installed at the bottom of the cover 1;

[0036] Force sensor 5 is mounted on the mounting structure and located near the gas generator body 2. A force transmission rod 6 is fixed to the input end of force sensor 5. The force transmission rod 6 can be bent to avoid obstructing the gas generator body 2. The end of the force transmission rod 6 is connected to the output end of the exhaust pipe 3. Force sensor 5 can be a load cell, preferably with an output sensitivity of 2.0±0.05mV / V. The preferred sensor size is φ41.2mm x 25mm. The force measurement logic of the sensor is based on the resistance change of the strain gauge, calculating the magnitude of the applied force according to the magnitude of the resistance change. It should be noted that the sensor does not deform or displace under the action of force.

[0037] Force acquisition device 12, the input end of force acquisition device 12 is connected to wire 11, the end of wire 11 away from force acquisition device 12 passes through cover 1 and is electrically connected to the output end of force sensor 5. Force acquisition device 12 includes a built-in display instrument. The sensor does not have a data filtering function. The filtering function is on the display instrument. The magnitude of the force measured by force sensor 5 can be displayed on the display instrument in real time.

[0038] The force sensor 5 and the force acquisition device 12 are set up to achieve high-speed and high-precision acquisition of the force. This enables accurate acquisition of the reaction force generated when the exhaust pipe 3 exhausts. In actual use, the computer can be electrically connected to the force acquisition device 12, and Ethernet testing software can be set up on the computer as a force acquisition system to realize real-time acquisition, storage, reading and export of the measured force data. By accurately detecting the reaction force of the exhaust pipe 3, it can be used to optimize the design of the exhaust pipe 3 and prevent the exhaust pipe from deforming during the exhaust process of the generator.

[0039] The force acquisition device 12 and the computer together form a force acquisition system. The force sensor 5 transmits the force signal to the force acquisition system through the wire 11. The force acquisition system realizes real-time high-speed acquisition and storage of force data, and obtains force value versus time curves for reading, storage, and data export.

[0040] Please refer to Figure 1-2 The installation structure includes a mounting bracket 4, which is installed at the bottom of the cover 1 and located on one side of the gas generator body 2. The force sensor 5 is installed on the mounting bracket 4. In this embodiment, the mounting bracket 4 is used to support the force sensor 5.

[0041] Please refer to Figure 1-6 The end of the force transmission rod 6 is fixed with a collar 7. The collar 7 is tubular and sleeved on the outside of the exhaust pipe 3. The collar 7 and the exhaust pipe 3 are fitted with a small clearance.

[0042] Please refer to Figure 1-6 It also includes a positioning pin 8, which has a positioning protrusion 9. The collar 7 has a positioning groove 10 that matches the positioning protrusion 9. The positioning pin 8 is used to be inserted into one of the exhaust holes of the exhaust pipe 3 to position the collar 7. The plane of the positioning groove 10 is parallel to the input end face of the force sensor 5. The force transmission rod 6 is vertically arranged between the positioning groove 10 and the force sensor 5, so that the positioning pin 8 can ensure that the force transmission direction is perpendicular to the contact surface of the force sensor 5.

[0043] It should be noted that the positioning pin 8 is only used to position the collar 7 before testing so that the direction of the reaction force transmission is perpendicular to the contact surface of the force sensor 5. After the collar 7 is positioned, the position of the force sensor 5 can be positioned. After the positioning is completed, the position of the force sensor 5 is fixed. Then the positioning pin 8 is pulled out of the exhaust port. The positioning pin 8 does not participate in the testing work during testing, so as not to affect the exhaust performance and cause inaccurate test data.

[0044] Example 2

[0045] Please refer to Figure 3-6The installation structure includes two annular tracks, 14 and 15, fixed to the bottom of the cover 1 and located on the outer periphery of the gas generator body 2. A slider 26 is slidably connected to the outer sides of the annular tracks 14 and 15, allowing the slider 26 to rotate along them. The annular tracks 14 and 15 serve as guides. Positioning screws 27 are threaded onto both sides of the slider 26 to fix its position. When it is necessary to position the slider 26, the positioning screws 27 can be turned. 27. Simply press the sliders together against the annular track 14 and annular track 25. The bottom of each slider 16 is fixed with a movable plate 16. When the fixed slider 16 moves, the movable plate 16 moves with it. Linear guide rails 17 are fixed to both sides of the bottom of the movable plate 16. Slider 28 is slidably connected to the outer side of the linear guide rails 17. The linear guide rails 17 guide the slider 28. Locating screws 219 are threaded onto the inner sides of the four corners of the bottom of slider 28, located at the bottom of the linear guide rails 17, to fix slider 28. Positioning: When it is necessary to position slider 2 18, tighten positioning screw 2 19 to make it press against linear guide rail 1 17. A mounting cover plate 1 20 is rotatably connected to the outer bottom of slider 2 18. Positioning screws 3 21 are threaded onto the inner sides of both sides of mounting cover plate 1 20 to fix its position. When it is necessary to position mounting cover plate 1 20, tighten positioning screws 3 21 to make it press against slider 2 18. A movable plate 2 22 is fixed to the bottom of mounting cover plate 1 20. When mounting cover plate 1 20 rotates, it will drive movable plate 2 22 to rotate. As the moving plate 22 rotates, linear guide rails 23 are fixed on both sides of the moving plate 22 near the gas generator body 2. Slider 3 24 is slidably connected to the outer side of the linear guide rails 23 on both sides. The linear guide rails 23 guide the slider 3 24. The four corners of the slider 3 24 are threaded with positioning screws 4 25 on the inner side of the slider 3 24 and on one side of the linear guide rails 223. These screws are used to fix the position of the slider 3 24. When it is necessary to position the slider 3 24, tighten the positioning screws 4 25 to make it press against the linear guide rails 223. The force sensor 5 is installed on the slider 3 24.

[0046] Example 3

[0047] Please refer to Figure 6 The slider 24 is rotatably connected to the mounting cover 28 on the side near the gas generator body 2. The mounting cover 28 has internal threaded positioning screws 29 on both sides to fix the position of the mounting cover 28. The force sensor 5 is mounted on the mounting cover 28 and is mounted on the slider 24 through the mounting cover 28. When it is necessary to position the mounting cover 28, tighten the positioning screws 29 to make it press against the slider 24.

[0048] In summary, the force sensor 5 can be rotated in space by the rotation of slider 1 26 around annular track 14 and annular track 2 15. The force sensor 5 can be moved horizontally in space by the linear movement of slider 2 18 along linear guide rail 17. The rotation of slider 1 26 around annular track 14 and annular track 2 15 allows the force sensor 5 to move in a plane. The rotational connection between mounting cover plate 1 20 and slider 2 18 allows the force sensor 5 to rotate in the horizontal plane. The movement of slider 3 24 along linear guide rail 2 23 allows the force sensor 5 to move vertically. The rotation of mounting cover plate 2 28 on slider 3 24 allows the force sensor 5 to rotate in the vertical plane. In summary, the position of the force sensor 5 can be adjusted in space as needed to adapt to the measurement of the reaction force of exhaust pipes 3 of different shapes.

[0049] The ignition canister 13 is detachably mounted at the bottom of the cover 1 and on the outside of the exhaust pipe 3, force sensor 5 and mounting structure. It should be noted that the gas generator body 2 is not limited to ignition in the ignition canister 13.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this 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 specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A force detection system with an exhaust pipe and a gas generator, comprising a gas generator body (2) and an exhaust pipe (3) connected to its output end, wherein the output end of the exhaust pipe (3) is provided with a plurality of exhaust holes, characterized in that, Also includes: Cover (1), the gas generator body (2) is mounted on the cover (1); The mounting structure is installed at the bottom of the cover (1); Force sensor (5), the force sensor (5) is mounted on the mounting structure and located on the side close to the gas generator body (2), the input end of the force sensor (5) is fixed with a force transmission rod (6), and the end of the force transmission rod (6) is connected to the output end of the exhaust pipe (3); Force value acquisition device (12), the input end of the force value acquisition device (12) is connected to a wire (11), the end of the wire (11) away from the force value acquisition device (12) passes through the cover (1) and is electrically connected to the output end of the force value sensor (5).

2. The force detection system with an exhaust pipe and gas generator according to claim 1, characterized in that, The mounting structure includes a mounting bracket (4), which is mounted on the bottom of the cover (1) and located on one side of the gas generator body (2), and the force sensor (5) is mounted on the mounting bracket (4).

3. The force detection system with an exhaust pipe and gas generator according to claim 1, characterized in that, The end of the force transmission rod (6) is fixed with a collar (7), which is sleeved on the outside of the exhaust pipe (3).

4. The force detection system with an exhaust pipe and gas generator according to claim 3, characterized in that, It also includes a positioning pin (8), which has a positioning protrusion (9) and a positioning groove (10) that matches the positioning protrusion (9) on the collar (7). The positioning pin (8) is used to insert into one of the exhaust holes of the exhaust pipe (3) to position the collar (7).

5. The force detection system with an exhaust pipe and gas generator according to claim 1, characterized in that, The installation structure includes an annular track 1 (14) and an annular track 2 (15) fixed to the bottom of the cover (1) and located on the outer periphery of the gas generator body (2). A slider 1 (26) is slidably connected to the outer side of the annular track 1 (14) and the annular track 2 (15). A positioning screw 1 (27) is threadedly connected to the inner side of both sides of the slider 1 (26) to fix the position of the slider 1 (26). A movable plate 1 (16) is fixed to the bottom of the two sliders 1 (26). A linear guide rail 1 (17) is fixed to both sides of the bottom of the movable plate 1 (16). A slider 2 (18) is slidably connected to the outer side of the linear guide rail 1 (17) on both sides. A positioning screw 2 (19) is threadedly connected to the inner side of the four corners of the bottom of the slider 2 (18) and located at the bottom of the linear guide rail 1 (17) to fix the position of the slider 2 (18). The position of the second slider (18) is such that a mounting cover plate (20) is rotatably connected to the outer bottom of the second slider (18), and positioning screws (21) are threadedly connected to the inner sides of both sides of the mounting cover plate (20) to fix the position of the mounting cover plate (20). A movable plate (22) is fixed to the bottom of the mounting cover plate (20), and linear guide rails (23) are fixed to the two sides of the movable plate (22) near one end of the gas generator body (2). A slider (24) is slidably connected to the outer side of the linear guide rails (23) on both sides. Positioning screws (25) are threadedly connected to the inner side of the four corners of the slider (24) and to the side of the linear guide rails (23) to fix the position of the slider (24). The force sensor (5) is installed on the slider (24).

6. The force detection system with an exhaust pipe and gas generator according to claim 5, characterized in that, The slider three (24) is rotatably connected to the mounting cover plate two (28) on the side close to the gas generator body (2). The mounting cover plate two (28) has internal threaded positioning screws five (29) on both sides for fixing the position of the mounting cover plate two (28). The force sensor (5) is mounted on the mounting cover plate two (28) and mounted on the slider three (24) through the mounting cover plate two (28).

7. The force detection system with an exhaust pipe and gas generator according to claim 1, characterized in that, The explosion-prone canister (13) is detachably mounted at the bottom of the cover (1) and on the outside of the exhaust pipe (3), the force sensor (5), and the mounting structure.

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