Test tool for verifying matching degree of passenger air bag restraint system and instrument panel assembly

Abstract

The utility model relates to the field of automobile safety, in particular to a test tool for verifying the matching degree of a passenger airbag and an instrument panel assembly, which comprises a main body frame, an airbag frame is embedded in the upper surface of the main body frame, a force sensor is arranged between the bottom of the airbag frame and the main body frame, and a passenger airbag is arranged in the airbag frame. The main body frame is provided with an imitated instrument panel decorative cover covering the upper side of the passenger air bag, the front end of the imitated instrument panel decorative cover is rotationally connected with the main body frame, a rotation angle sensor is arranged at the rotational connection position, and an acceleration sensor is arranged on the surface of the imitated instrument panel decorative cover. According to the device, the counter-acting force generated by the passenger air bag on the instrument panel assembly and the impact force generated by the passenger air bag on the instrument panel trim cover in the detonation process can be collected, the matching degree of the passenger air bag and the instrument panel assembly is verified through the collected data, and effective test data are provided for design development of the passenger air bag module and the instrument panel assembly and simulation benchmarking of CEA.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle safety, in particular to a test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly. Background Art

[0002] Inside the vehicle cab, the occupant airbag module is installed inside the instrument panel assembly. When the vehicle collides, the occupant airbag receives an electrical signal and is detonated to prevent the occupant from hitting the instrument panel inside the vehicle due to inertia and reduce the injury suffered by the occupant.

[0003] During the detonation process of the occupant airbag, a downward impact force (reaction force) is generated on the instrument panel assembly and an upward impact force on the instrument panel cover. At the same time, during the development stage of the instrument panel assembly and the occupant airbag, the matching degree between the two needs to be verified multiple times to prevent hard fragments from flying out when the instrument panel breaks during the detonation process of the occupant airbag, causing harm to the occupants, or the broken instrument panel scratching the airbag so that the occupant airbag cannot play a protective role.

[0004] Therefore, if test data can be accurately collected during the product development stage, it will help designers verify and optimize the structure, materials, and the matching degree between the occupant airbag and the instrument panel assembly. Summary of the Utility Model

[0005] In view of the above problems, an embodiment of the utility model provides a test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly.

[0006] The test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly provided by the embodiment of the utility model includes a main frame. An airbag frame is embedded on the upper surface of the main frame. A force sensor is arranged between the bottom of the airbag frame and the main frame. The occupant airbag is arranged in the airbag frame. An imitation instrument panel cover covering the upper side of the occupant airbag is arranged on the main frame. The front end of the imitation instrument panel cover is rotatably connected to the main frame, and a corner sensor is arranged at the rotatable connection position. An acceleration sensor is arranged on the surface of the imitation instrument panel cover.

[0007] Compared with the prior art, the beneficial effect of the utility model is that it can collect the reaction force generated by the occupant airbag on the instrument panel assembly and the impact force on the instrument panel cover during the detonation process, use the collected data to verify the matching degree between the occupant airbag and the instrument panel assembly, and provide effective test data for the design and development of the occupant airbag module and the instrument panel assembly and the simulation benchmarking of CEA.

[0008] Optionally, the main frame includes a bottom plate. Lifting columns are arranged on the bottom plate. The top ends of the lifting columns are provided with a top plate. An airbag frame setting hole is opened in the middle of the top plate.

[0009] Optionally, the airbag frame includes a frame body adapted to the occupant airbag. An upper fixing column is provided near the bottom surface of the frame body close to the installation point of the occupant airbag. The force sensor is connected to the bottom of the upper fixing column, and the bottom of the force sensor is connected to a lower fixing column, and the lower fixing column is connected to the surface of the bottom plate.

[0010] Optionally, the hole provided in the airbag frame is slightly larger than the outer contour of the frame body to achieve a clearance fit between the hole provided in the airbag frame and the frame body.

[0011] Optionally, the imitation instrument panel trim cover adopts a layered structure, including white steel plates on both sides and a foam layer in the middle of the white steel plates.

[0012] Optionally, the main body frame further includes a front-end housing provided on one side of the front end of the imitation instrument panel trim cover for limiting the flipping of the imitation instrument panel trim cover during the test to protect the acceleration sensor. The front end of the imitation instrument panel trim cover is rotatably connected to the front-end housing.

[0013] Optionally, a high-speed camera is provided on the side of the main body frame. Description of the Drawings

[0014] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application, and do not constitute a limitation to the present utility model. In the drawings:

[0015] Figure 1 is a three-dimensional structural diagram of a test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly provided by an embodiment of the present utility model;

[0016] Figure 2 is a front view structural diagram of a test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly provided by an embodiment of the present utility model;

[0017] Figure 3 is a side view structural diagram of a test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly provided by an embodiment of the present utility model;

[0018] Figure 4 is a sectional view structural diagram of a test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly provided by an embodiment of the present utility model;

[0019] Figure 5 is a top view structural diagram of a test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly provided by an embodiment of the present utility model

[0020] Figure 6 is a structural schematic diagram of a part of the airbag frame provided by an embodiment of the present utility model.

[0021] Among them, 1. Main body frame; 2. Airbag frame; 3. Force sensor; 4. Occupant airbag; 5. Instrument panel trim cover imitation; 6. Corner sensor; 7. Acceleration sensor; 8. Bottom plate; 9. Lifting column; 10. Top plate; 11. Airbag frame setting hole; 12. Airbag frame main body; 13. Upper fixed column; 14. Lower fixed column; 15. Front end housing. Specific implementation manner

[0022] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the implementation manners and the accompanying drawings. Herein, the illustrative implementation manners of the present utility model and their descriptions are used to explain the present utility model, but do not limit the present utility model.

[0023] See Figures 1-6 , a test tool for verifying the matching degree between an occupant airbag and an instrument panel assembly provided by an embodiment of the present utility model includes a main body frame 1. An airbag frame 2 is embedded on the upper surface of the main body frame 1. A force sensor 3 is arranged between the bottom of the airbag frame 2 and the main body frame 1 for collecting the reaction force generated on the instrument panel trim cover during the initiation process of the occupant airbag 4. The occupant airbag 4 is arranged in the airbag frame 2. An instrument panel trim cover imitation 5 covering the upper side of the occupant airbag 4 is arranged on the main body frame 1. The front end of the instrument panel trim cover imitation 5 is rotatably connected to the main body frame 1, and a corner sensor 6 is arranged at the rotation connection position for collecting the rotation angle of the trim cover during the initiation process of the occupant airbag. An acceleration sensor 7 is arranged on the surface of the instrument panel trim cover imitation 5 for collecting the acting force generated on the trim cover during the deployment process of the occupant airbag 4.

[0024] During implementation, the main body frame 1 includes a bottom plate 8. Lifting columns 9 are arranged on the bottom plate 8. The top ends of the lifting columns 9 are provided with a top plate 10. An airbag frame setting hole 11 is opened in the middle of the top plate 10; the lifting columns 9 include two upper and lower parts connected by a threaded structure for adjusting the height according to the gap between the occupant airbag and the instrument panel trim cover in the actual vehicle data. After the adjustment is completed, the top plate 10 is installed to make the distance between the instrument panel trim cover imitation 5 and the occupant airbag 4 match the actual vehicle data; the top plate 10 and the lifting columns 9 can adopt a bolt connection method. For example, through holes are opened on the bottom surface of the top plate 10, threaded holes are arranged at the top ends of the lifting columns 9, and after the through holes in the top plate 10 are aligned with the threaded holes in the lifting columns 9, they are fastened by bolts.

[0025] The airbag frame 2 includes an airbag frame main body 12 adapted to the occupant airbag 4. An upper fixing column 13 is arranged near the bottom surface of the airbag frame main body 12 close to the installation position of the occupant airbag. The force sensor 3 is connected to the bottom of the upper fixing column 13. The bottom of the force sensor 3 is connected to a lower fixing column 14, and the lower fixing column 14 is connected to the surface of the bottom plate 8. Since the reaction forces at each position are different, four force sensors 3 are set to complete separate data collection to ensure comprehensive and accurate data, providing accurate data support for product design.

[0026] The airbag frame setting hole 11 is slightly larger than the outer contour of the airbag frame main body 12, realizing the clearance fit between the airbag frame setting hole 11 and the airbag frame main body 12; that is, there are gaps around the airbag frame main body 12, and it is in an unconstrained state both horizontally and vertically, ensuring the effectiveness of data during the collection process.

[0027] The imitation instrument panel trim cover 5 adopts a layered structure, including white steel plates on both sides and a foam layer in the middle of the white steel plates; its size meets the requirement of covering the airbag frame main body 12, and its weight should be the weight of the instrument panel trim cover in the actual vehicle data.

[0028] In a specific implementation, the main body frame 1 further includes a front-end housing 15 arranged on one side of the front end of the imitation instrument panel trim cover 5 for limiting the flipping of the imitation instrument panel trim cover 5 during the test to protect the acceleration sensor 7. The front end of the imitation instrument panel trim cover 5 is rotatably connected to the front-end housing 15.

[0029] During the implementation, a high-speed camera can also be arranged on the side of the main body frame 1. For example, high-speed cameras are simultaneously arranged on the rear side of the main body frame, the left side or the right side of the main body frame 1. The high-speed camera is used to photograph the detonation process of the occupant airbag 4, so that designers can understand the detonation state of the occupant airbag 4 and the movement state of the imitation instrument panel trim cover 5 according to the video data, and verify the matching degree between the occupant airbag and the instrument panel assembly.

[0030] During the experiment, the occupant airbag 4 is placed in the airbag frame 2. Adjust the height of the lifting column 9. After the height is adjusted, install the top 10 on the lifting column 9, and cover the instrument panel trim cover 5 on the airbag frame 2. Turn on the light, and adjust the high-speed camera to shoot from the side and the back (the side where the instrument panel trim cover defined in the front is connected to the front-end housing is the front, so here it is the back) at a speed of at least 2000fps to ensure that each high-speed camera can capture the entire detonation process; the occupant airbag 4 detonates. The detonation method can be a detonation current of 1.75A and a detonation duration of 0.5ms, or a detonation current of 1.2A and a detonation duration of 2ms. During the detonation process, use the force sensor 3 to collect the reaction force generated by the occupant airbag 4 on the instrument panel trim cover during the detonation process, use the angular displacement sensor 6 to collect the rotation angle of the trim cover during the detonation process of the occupant airbag, use the acceleration sensor 7 to collect the force generated by the occupant airbag 4 on the trim cover during the deployment process, and at the same time use the high-speed camera to collect the video data of the detonation process of the occupant airbag 4; use the collected data to verify the matching degree between the occupant airbag and the instrument panel assembly, and provide effective test data for the design and development of the occupant airbag module and the instrument panel assembly and the simulation comparison of CEA.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A test fixture for verifying the matching degree between a passenger airbag and an instrument panel assembly, characterized in that: It includes a main frame, an airbag frame is embedded in the upper surface of the main frame, a force sensor is arranged between the bottom of the airbag frame and the main frame, a passenger airbag is arranged in the airbag frame, an imitation instrument panel decorative cover covering the upper side of the passenger airbag is arranged on the main frame, the front end of the imitation instrument panel decorative cover is rotatably connected to the main frame, and an angle sensor is arranged at the rotational connection position, and an acceleration sensor is arranged on the surface of the imitation instrument panel decorative cover.

2. The test fixture for verifying the matching degree between the passenger airbag and the instrument panel assembly according to claim 1, characterized in that: The main frame comprises a bottom plate, a lifting column is arranged on the bottom plate, a top plate is arranged on the top of the lifting column, and an airbag frame setting hole is opened in the middle of the top plate.

3. The test fixture for verifying the matching degree between the passenger airbag and the instrument panel assembly as claimed in claim 2, characterized in that: The airbag frame includes a bag frame body adapted to the passenger airbag, an upper fixed column is arranged on the bottom surface of the bag frame body near the passenger airbag installation point, a force sensor is connected to the bottom of the upper fixed column, a lower fixed column is connected to the bottom of the force sensor, and the lower fixed column is connected to the surface of the bottom plate.

4. The test fixture for verifying the matching degree between the passenger airbag and the instrument panel assembly as claimed in claim 3, characterized in that: The setting hole of the airbag frame is slightly larger than the outer contour of the airbag frame body, so as to achieve clearance fit between the setting hole of the airbag frame and the airbag frame body.

5. The test fixture for verifying the matching degree between the passenger airbag and the instrument panel assembly as claimed in claim 1, characterized in that: The imitation instrument panel cover adopts a layered structure, including white steel plates on both sides and a foam layer in the middle of the white steel plates.

6. The test fixture for verifying the matching degree between the passenger airbag and the instrument panel assembly as claimed in claim 2, characterized in that: The main frame also includes a front end shell arranged on the front side of the imitation instrument panel cover for turning over and limiting the imitation instrument panel cover during the test to protect the acceleration sensor. The front end of the imitation instrument panel cover is rotatably connected to the front end shell.

7. The test fixture for verifying the matching degree between the passenger airbag and the instrument panel assembly as claimed in claim 1, characterized in that: A high-speed camera is set on the side of the main frame.

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