Airbag impact force detection tool

Abstract

The invention discloses an air bag impact force detection tool, which comprises an air bag accommodating tool and a detection plate which are oppositely arranged at an interval, and is characterized in that the detection plate is provided with at least one first pressure sensor; the air bag containing tool comprises an installation side plate, an air bag containing part and a clamping part, wherein the air bag is fixedly connected to the installation side plate; the boundary fixing plate is fixedly connected to the mounting side plate; the boundary fixing plate is used for limiting an expansion boundary after the air bag is inflated; the door plate is connected to the boundary fixing plate in a pivoted mode, and the door plate can open or close the containing space limited by the installation side plate and the boundary fixing plate; in an initial state, the air bag is accommodated in the accommodating space; and in an inflation state, the impact force of the air bag pushes the door plate to be opened and acts on the detection plate. According to the invention, the impact force on the vehicle door trim panel when the seat side air bag is unfolded can be truly simulated, and a reliable test environment is provided for performance evaluation of the air bag.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile safety detection, in particular to an airbag impact force detection tool. BACKGROUND

[0002] The automobile safety airbag is an important part of the automobile passive safety system, and its performance is directly related to the safety of the driver and passenger in the collision accident. Accurate detection of airbag impact force is crucial for optimizing airbag design and improving airbag protection effect.

[0003] For a car equipped with a seat side airbag, it is necessary to repeatedly verify the impact of airbag static point explosion and the strength matching design of interior panels and seats in the environment. At present, the destruction degree of side airbag point explosion is often arranged in whole vehicle test or side airbag subsystem point explosion test, repeated experiments are carried out many times, and each airbag point explosion experiment will permanently damage an automobile seat. At present, there is a lack of such reusable flexible tool to accurately obtain the impact force of airbag point explosion. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a detection tool for accurately detecting airbag impact force in the development experiment of existing seat side airbag products, so as to judge the interactive influence degree between side airbag static deployment and side wall trim panel.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme:

[0006] An airbag impact force detection tool, comprising: an airbag containing tool and a detection plate arranged in opposite intervals, at least one first pressure sensor is installed on the detection plate; the airbag containing tool comprises: a mounting side plate for mounting an airbag; a boundary fixed plate fixedly connected to the mounting side plate, the boundary fixed plate defines the inflation boundary of the airbag after inflation; a door plate pivotally connected to the boundary fixed plate, the door plate can open or close the containing space limited by the mounting side plate and the boundary fixed plate; in the initial state, the airbag is contained in the containing space; in the inflation state, the impact force of the airbag pushes the door plate to open and acts on the detection plate.

[0007] In some embodiments of the present application, the airbag containing tool further comprises a second pressure sensor mounted on the boundary fixed plate, and the second pressure sensor is used to detect the pressure acting on the boundary fixed plate after the airbag inflates.

[0008] In some embodiments of the present application, a moving plate is further arranged between the airbag and the boundary fixed plate, one end of the second pressure sensor is connected to the moving plate, and the other end is connected to the boundary fixed plate.

[0009] In some embodiments of the present application, the door panel is provided with a damping block detachably connected thereto.

[0010] In some embodiments of the present application, a support assembly for supporting the airbag accommodating tool is further included, the support assembly comprising a height adjusting support located at the lower side and a pitch adjusting support located at the upper side, and the airbag accommodating tool is mounted on the pitch adjusting support.

[0011] In some embodiments of the present application, the pitch adjusting support comprises a lower support plate and an upper support plate arranged at intervals, one end of the lower support plate and the upper support plate is pivotally connected, and the other end is detachably connected through the adjustable fastening assembly.

[0012] In some embodiments of the present application, the adjustable fastening assembly comprises a lower pivot support seat fixed to the lower support plate, and an upper pivot support seat fixed to the upper support plate, a first pivot shaft is mounted on the lower pivot support seat, a second pivot shaft is mounted on the upper pivot support seat, the first pivot shaft and the second pivot shaft are respectively provided with radially extending threaded holes, and the threaded holes of the first pivot shaft and the second pivot shaft are opposite in screw direction; the adjustable fastening assembly further comprises a fastening bolt and a fastening nut, the fastening bolt is connected into the threaded holes of the first pivot shaft and the second pivot shaft respectively, and the fastening nut is used to fix the lower support plate and the upper support plate.

[0013] In some embodiments of the present application, a pitch angle indicating device is further included, the pitch angle indicating device comprises a pointer arranged on the upper surface of the lower support plate and an indicating disc arranged on the lower surface of the upper support plate.

[0014] In some embodiments of the present application, the pitch adjusting support comprises a first support plate fixedly connected to the upper surface of the height adjusting support, and a second support plate arranged at intervals on the upper side of the first support plate; in a first direction, one end of the first support plate and the second support plate is pivotally connected, and the other end is detachably connected through the adjustable fastening assembly.

[0015] In some embodiments of the present application, the pitch adjusting support further comprises a third support plate arranged at intervals on the upper side of the second support plate; in a second direction, one end of the first support plate and the second support plate is pivotally connected, and the other end is detachably connected through the adjustable fastening assembly; the first direction and the second direction are respectively along the horizontal direction and perpendicular to each other.

[0016] The technical solution of the present application has the following technical effects compared with the prior art:

[0017] The airbag impact force detection tool provided by the application comprises a gas bag accommodating tool, a support assembly, a detection plate and a first pressure sensor.

[0018] Further, the airbag impact force detection tool provided by the application comprises a second pressure sensor arranged to detect the pressure of the gas bag on the boundary fixing plate and / or the mounting side plate, so that the pressure data in multiple aspects can be obtained, and the inflation and impact performance of the gas bag can be comprehensively evaluated.

[0019] Further, the airbag impact force detection tool provided by the application comprises a height adjusting support and a pitch adjusting support, so that the tool can adapt to the simulation requirements of seats with different heights and different pitch angles, the comprehensiveness and accuracy of detection are improved, and diversified test requirements can be met. BRIEF DESCRIPTION OF DRAWINGS

[0020] The preferred embodiments of the application will be described in detail below with reference to the accompanying drawings, which will help to understand the purposes and advantages of the application, wherein:

[0021] Figure 1 is a working state diagram of a specific embodiment of the airbag impact force detection tool of the application;

[0022] Figure 2 is a schematic view of a specific embodiment of the gas bag accommodating tool in the airbag impact force detection tool of the application;

[0023] Figure 3 is another schematic view of a specific embodiment of the gas bag accommodating tool in the airbag impact force detection tool of the application;

[0024] Figure 4 is a side view of a specific embodiment of the gas bag accommodating tool in the airbag impact force detection tool of the application;

[0025] Figure 5 is a A-A sectional view of Figure 4 ;

[0026] Figure 6 is a structural schematic view of a specific embodiment of the support assembly in the airbag impact force detection tool of the application;

[0027] Figure 7 is another structural schematic view of a specific embodiment of the support assembly in the airbag impact force detection tool of the application;

[0028] Figure 8 is a front view of the detection plate in the airbag impact force detection tool of the application. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0033] As shown in Figure 1 is a specific embodiment of the airbag impact force detection tool (hereinafter referred to as detection tool) provided by the present application. The detection tool includes an airbag containing tool 1 and a detection plate 2 arranged in opposite intervals. The surface of the detection plate 2 is provided with at least one first pressure sensor 21 for accurately capturing airbag impact force data. In a specific embodiment, as shown in Figure 8 , a plurality of first pressure sensors 21 arranged in a matrix are arranged on the detection plate 2, which can realize impact force detection of different areas of the detection plate 2.

[0034] Specifically, as shown in Figure 2As shown, the airbag containing tool 1 adopts a modular design, which includes a mounting side plate 11, a boundary fixing plate 12, and a door plate 13. The mounting side plate 11 serves as a bearing base for the airbag, and in operation, the plate surface extends in the vertical direction and is fixed to the airbag (not shown in the figure) through fastening bolts. The boundary fixing plate 12 is fixed vertically on the mounting side plate 11, and its pre-set geometric boundary limits the inflation range of the airbag after inflation. The door plate 13 is pivotally connected to the boundary fixing plate 12 through a hinge structure, and can be flexibly opened and closed to close or open the containing space enclosed by the mounting side plate 11 and the boundary fixing plate 12.

[0035] In the initial assembly state, the airbag is completely contained in the containing space; when the inflation program is triggered, the airbag rapidly expands, generating an impact force that pushes the door plate 13 to open outward and directly transmits the force to the detection plate 2, and the first pressure sensor 21 on the detection plate 2 completes data acquisition.

[0036] The airbag containing tool 1 described above serves as a simulation carrier for the side seat, accurately adapting to the installation layout of the airbag; the detection plate 2 is used to simulate the stress state of the interior panel of the door opposite to the side of the seat. When the airbag is triggered to inflate and expand, the instantaneous burst force drives the door plate 13 to open along the pre-set trajectory, and the impact force is transmitted to the surface of the detection plate 2 through the door plate 13. At this time, the first pressure sensor 21 integrated in the key stress area of the detection plate 2 captures and quantifies the dynamic impact force data of the airbag expansion in real time by means of high-sensitivity sensing technology. The tool system adopts a modular design concept, which not only has a simple structure and is easy to operate, but also provides a reliable experimental verification scheme for airbag impact force detection by highly simulating real working conditions, effectively improving the accuracy of test data and the value of engineering application.

[0037] Specifically, the boundary fixing plate 12 is provided with four boundary fixing plates 12, and the four boundary fixing plates 12 enclose a rectangular containing space. The design of the rectangular containing space can better simulate the shape of the installation space of the airbag in the actual side seat. The four boundary fixing plates 12 limit the expansion of the airbag from four directions, so that the stress condition of the airbag during inflation is closer to the actual use scenario. This structural design helps to improve the accuracy and reliability of the detection results, and provides a more realistic simulation environment for performance evaluation of the airbag.

[0038] In one specific embodiment, referring to Figure 3 The airbag containing tool 1 further includes a second pressure sensor 14 mounted on the boundary fixing plate 12 and the mounting side plate 11. The second pressure sensor 14 is used to detect the pressure acting on the boundary fixing plate 12 and the mounting side plate 11 after the airbag inflates.

[0039] By setting the second pressure sensor 14, the pressure data of the airbag on the boundary fixed plate 12 and the installation side plate 11 during the inflation process can be obtained. This not only helps to further understand the inflation characteristics of the airbag, but also indirectly analyzes the impact force of the airbag on the seat through pressure conduction. In practical application, the impact force of the airbag directly affects the structural stability and safety of the seat. For example, by analyzing the data of the second pressure sensor 14, it can be judged whether the inflation of the airbag is uniform, whether there is a local pressure that is too high or too low. These data can reflect the impact difference of the airbag on different parts of the seat at the moment of unfolding, thereby providing a basis for evaluating the adaptability of the seat and the airbag, and providing data support for the optimization design of the airbag and the strengthening of the seat structure, ensuring that when the two work together, the impact force can be effectively dispersed, and the safety of the driver and passengers can be ensured.

[0040] Specifically, in some embodiments, as shown in Figures 3-5 The detection tool further includes a moving plate 15 located between the airbag and the boundary fixed plate 12, forming a buffer detection structure. The moving plate 15 is in a rectangular structure, the size of which is adapted to the effective action surface of the airbag. The moving plate 15 is formed with a connecting through hole in the shape of an I-beam. The second pressure sensor 14 includes a sensor body and connecting rods respectively arranged on both sides of the sensor body. One side of the connecting rod of the second pressure sensor 14 is arranged on the connecting hole of the boundary fixed plate 12 and connected by a fastener, and the other side of the connecting rod is arranged on the connecting through hole of the moving plate 15 and connected by a fastener.

[0041] The arrangement of the moving plate 15 enables the second pressure sensor 14 to more accurately detect the pressure of the airbag acting on the boundary fixed plate 12. When the airbag inflates, it first acts on the moving plate 15, which transmits the pressure to the second pressure sensor 14. The moving plate 15 can act as a buffer and uniformly transmit the pressure, avoiding inaccurate pressure detection caused by the airbag directly acting on the second pressure sensor 14. At the same time, the moving plate 15 can also protect the second pressure sensor 14 from being damaged under the impact of the airbag.

[0042] Since opening the door plate 13 consumes some energy during the inflation of the airbag. The influence of the hindrance of the side airbag unfolding is also different for different seats. In an alternative embodiment, as shown in Figure 1 A damping block 131 is arranged on the outer surface of the door plate 13. By detachably installing damping blocks 131 of different masses, the moment of inertia of the rotating door cover is changed, further simulating the different hindering effects of the airbag unfolding by different seats. The lateral impact force is weakened by the door plate 13 and hits the detection plate 2 on the side. Through the uniformly distributed first pressure sensor 21 on the detection plate 2, the initial contact point and the place with the maximum impact force of the side airbag during the unfolding process are obtained.

[0043] Specifically, in order to further optimize the simulation effect of the detection tool, the present scheme adds a support assembly 3 for supporting the airbag containing tool 1. As shown in Figure 6 、 Figure 7 , the support assembly 3 adopts a modular double-layer structure design, including a height adjustment support 31 located on the lower side and a pitch adjustment support 32 located on the upper side. The height adjustment support 31 is used to simulate the seat height adjustment mechanism to adjust the up-down position of the airbag containing tool 1 relative to the detection plate 2, so as to simulate the seat at different height positions. The pitch adjustment support 32 is used to simulate the pitch in the front-rear direction and / or the pitch in the left-right direction. By adjusting the height adjustment support 31 and the pitch adjustment support 32, the position and angle of the airbag relative to the detection plate 2 can be changed, thereby simulating the impact of the airbag on the door trim at different sitting postures when the airbag is deployed, further improving the comprehensiveness and accuracy of the detection.

[0044] Specifically, the airbag containing tool 1 is installed on the upper surface of the pitch adjustment support 32. More specifically, as shown in Figure 4 , the side support 17 and the bottom support 16 provided on the side away from the boundary fixed plate 12 of the installation side plate 11 of the airbag containing tool 1 form a triangular frame structure, and the bottom support 16 is fixedly connected to the upper surface of the pitch adjustment support 32.

[0045] In a specific embodiment, the height adjustment support 31 is composed of four independent electric lifting columns, and each group of column is provided with an anti-skid rubber pad at the bottom, and the precise height adjustment can be realized through a PLC control system.

[0046] In a specific embodiment, the pitch adjustment support 32 includes a lower support plate and an upper support plate arranged in a spaced manner. That is, in a group of pitch adjustment supports 32, the support plate located on the lower side is the lower support plate, and the support plate located on the upper side is the upper support plate. For example, as shown in Figure 6 、 Figure 7 , the lower support plate is the first support plate 321 of the lower pitch adjustment support and the second support plate 322 of the upper pitch adjustment support, and correspondingly, the upper support plate is the second support plate 322 of the lower pitch adjustment support and the third support plate 323 of the upper pitch adjustment support. One end of the lower support plate and the upper support plate is pivotally connected through a pivot 324, and the other end is detachably connected through an adjustable fastening assembly 325. By loosening the adjustable fastening assembly 325, the lower support plate and the upper support plate can be pivoted relative to each other, and then fixed after being adjusted to the appropriate angle through the adjustable fastening assembly 325. For example, in actual use, the airbag containing tool 1 can be adjusted to different pitch angles, such as 10° forward inclination and 15° backward inclination, according to different test requirements, so as to simulate the deployment of the airbag under various seat postures.

[0047] Specifically, in one specific embodiment, the adjustable fastening assembly 325 includes a lower pivot support seat 3251 fixed on the lower support plate, and an upper pivot support seat 3252 fixed on the upper support plate. A first pivot shaft 3253 is installed on the lower pivot support seat 3251, and a second pivot shaft 3254 is installed on the upper pivot support seat 3252. The first pivot shaft 3253 and the second pivot shaft 3254 are respectively provided with radially extending threaded holes. The adjustable fastening assembly 325 further includes a fastening bolt 3255 and a fastening nut 3256. The fastening bolt 3255 is threaded into the threaded holes of the first pivot shaft 3253 and the second pivot shaft 3254, and the position of the lower support plate and the upper support plate is fixed by the fastening nut 3256.

[0048] The threaded holes of the first pivot shaft 3253 and the second pivot shaft 3254 are opposite in rotation direction, and the fastening bolt 3255 is correspondingly provided with two sections of external threads opposite in rotation direction. When adjusting the pitch angle, the fastening nut 3256 is loosened first, and then the fastening bolt 3255 is tightened clockwise or counterclockwise, so that the upper support plate rotates around the pivot part 324 towards the direction of approaching or moving away from the lower support plate, to realize the adjustment of the pitch angle. During the rotation of the fastening bolt 3255, the first pivot shaft 3253 and the second pivot shaft 3254 can rotate relative to the lower pivot support seat 3251 and the upper pivot support seat 3252 respectively, so that the threaded holes on them are aligned. After the adjustment is completed, the fastening nut 3256 is tightened, so that the relative position of the lower support plate and the upper support plate is fixed, to ensure the stability of the pitch adjustment bracket 32 during the air bag impact test.

[0049] The detection tool further includes a pitch angle indicating device 34, which includes a pointer 341 arranged on the upper surface of the lower support plate, and an indicating disc 342 arranged on the lower surface of the upper support plate.

[0050] The pitch angle indicating device 34 can directly display the pitch angle of the pitch adjustment bracket 32. When adjusting the pitch angle, the operator can accurately adjust the air bag containing tool 1 to the required angle by observing the position of the pointer 341 on the indicating disc 342. For example, the indicating disc 342 can be marked with 0°, 5°, 10°, etc. scales, to facilitate the operator to accurately adjust the angle and improve the accuracy and efficiency of the test.

[0051] Specifically, in an optional embodiment, the pitch adjustment support 32 comprises a first support plate 321, a second support plate 322 and a third support plate 323 arranged in sequence. The first support plate 321 is fixedly connected to the upper surface of the height adjustment support 31, the second support plate 322 is located on the upper side of the first support plate 321, and the third support plate 323 is located on the upper side of the second support plate 322. In the first direction (for example, the front-back direction) in the horizontal direction, the first support plate 321 and the second support plate 322 are pivotally connected at one end and detachably connected at the other end through the adjustable fastening assembly 325; in the second direction (for example, the left-right direction) perpendicular to the first direction, the second support plate 322 and the third support plate 323 are also pivotally connected at one end and detachably connected at the other end through the adjustable fastening assembly 325.

[0052] This structure realizes two-dimensional pitch angle adjustment of the pitch adjustment support 32 in the front-back direction and the left-right direction through the arrangement of three support plates and the cooperation of the pivot connection and the adjustable fastening assembly 325 in two perpendicular directions. In actual airbag impact force detection, the angle of the support in the two directions can be flexibly adjusted according to different test requirements, and the complex posture of the seat in various use states can be accurately simulated, so that the impact force of the airbag when it is deployed in different seat postures can be more comprehensively tested, and accurate data support for the impact performance evaluation of the airbag on the seat and the interior trim panel is provided.

[0053] Obviously, the above embodiments are only examples for clear illustration, and are not limitations on the embodiments. Based on the above description, other different forms of changes or variations can be made by those of ordinary skill in the art. All embodiments do not need to be exhausted here. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An airbag impact force detection tool characterized by comprising: The application relates to an airbag accommodating device and a support assembly thereof. The airbag accommodating device comprises: a mounting side plate for mounting an airbag; a boundary fixing plate fixedly connected to the mounting side plate, the boundary fixing plate defining an expansion boundary of the airbag after inflation; a door plate pivotally connected to the boundary fixing plate, the door plate being capable of opening or closing a mounting space defined by the mounting side plate and the boundary fixing plate; in an initial state, the airbag is accommodated in the mounting space; in an inflated state, an impact force of the airbag pushes the door plate to open and act on the detection plate. The airbag accommodating device further comprises a second pressure sensor mounted on the boundary fixing plate, the second pressure sensor being used for detecting a pressure acting on the boundary fixing plate after inflation of the airbag.

2. The airbag impact force detection tool according to claim 1, wherein The airbag accommodating device further comprises a moving plate located between the airbag and the boundary fixing plate, one end of the second pressure sensor being connected to the moving plate and the other end being connected to the boundary fixing plate.

3. The airbag impact force detection tool according to claim 2, wherein The door plate is provided with a damping block detachably connected thereto.

4. The airbag impact force detection tool according to claim 1, wherein The airbag accommodating device further comprises a support assembly for supporting the airbag accommodating device, the support assembly comprising a height adjusting support located at a lower side and a pitch adjusting support located at an upper side, the airbag accommodating device being mounted on the pitch adjusting support.

5. The airbag impact force detection tool according to claim 2, wherein The pitch adjusting support comprises a lower support plate and an upper support plate located at intervals, one end of the lower support plate being pivotally connected to the upper support plate and the other end being detachably connected to the upper support plate through an adjustable fastening assembly.

6. The airbag impact force detection tool according to claim 5, wherein The adjustable fastening assembly comprises a lower pivot support seat fixed to the lower support plate and an upper pivot support seat fixed to the upper support plate, a first pivot shaft being mounted on the lower pivot support seat and a second pivot shaft being mounted on the upper pivot support seat, the first pivot shaft and the second pivot shaft being respectively provided with radially extending threaded holes, the threaded holes of the first pivot shaft and the second pivot shaft being opposite in screw direction; the adjustable fastening assembly further comprises a fastening bolt and a fastening nut, the fastening bolt being connected to the threaded holes of the first pivot shaft and the second pivot shaft respectively and the fastening nut being used for fixing the lower support plate and the upper support plate.

7. The airbag impact force detection tool according to claim 6, wherein The pitch adjusting support further comprises a pitch angle indicating device, the pitch angle indicating device comprising a pointer arranged on an upper surface of the lower support plate and an indicating disc arranged on a lower surface of the upper support plate.

8. The airbag impact force detection tool according to claim 6, wherein The pitch adjusting support comprises a first support plate fixedly connected to an upper surface of the height adjusting support and a second support plate located at an upper side of the first support plate and spaced apart from the first support plate; in a first direction, one end of the first support plate is pivotally connected to the second support plate and the other end is detachably connected to the second support plate through the adjustable fastening assembly.

9. The airbag impact force detection tool according to claim 6, wherein The pitch adjusting support further comprises a third support plate located at an upper side of the second support plate and spaced apart from the second support plate; in a second direction, one end of the first support plate is pivotally connected to the second support plate and the other end is detachably connected to the second support plate through the adjustable fastening assembly; the first direction and the second direction are respectively along a horizontal direction and perpendicular to each other.

10. The airbag impact force detection tool according to claim 9, wherein ​

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