Linear impact testing device suitable for vehicle airbag explosion
Through the linear impact test device, the cylinder piston motion and inertial impact, combined with the acceleration sensor and laser speedometer, the problem that traditional vertical drop test cannot accurately detect the impact force of the airbag, and achieve the accuracy and reliability of the airbag impact test.
Patent Information
- Application Number
- CN202422044267.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-22
AI Technical Summary
The traditional airbag impact test adopts a vertical drop method, which cannot accurately detect the impact force that the airbag can withstand, resulting in inaccurate test results, which can easily lead to the failure of the airbag impact test.
A linear impact test device is adopted, including a linear impact table, a three-axis moving platform and a pneumatic impact assembly. It stops after moving to the end of the stroke through the cylinder piston. The spherical impact head impacts the sample by inertia. The acceleration sensor and laser speedometer record the acceleration and velocity before and after the impact.
Accurate detection of the impact force of the airbag is achieved, and the accuracy and reliability of the test are improved.
Smart Images
Figure CN223050821U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automotive airbag safety, and particularly to a linear impact test device applicable to the ignition of vehicle airbags. Background Technique
[0002] With the development of science and technology, the number of automobiles in use is increasing, and the resulting automotive safety issues have increasingly attracted people's attention.
[0003] The traditional airbag impact test adopts the vertical drop test method, where an impact block of a certain mass is dropped from above. In such a test, the automotive airbag not only has to withstand the acceleration impact force of the impact block but also support the impact force caused by gravity during the fall of the impact block. This method cannot accurately detect the test accuracy of the impact force that the airbag can withstand, and it is easy to cause the failure of the airbag impact test. Content of the Utility Model
[0004] In order to solve the problem that the traditional airbag impact test adopts the vertical drop test method, where an impact block of a certain mass is dropped from above. In such a test, the automotive airbag not only has to withstand the acceleration impact force of the impact block but also support the impact force caused by gravity during the fall of the impact block. This method cannot accurately detect the test accuracy of the impact force that the airbag can withstand, and it is easy to cause the failure of the airbag impact test; the purpose of the present utility model is to provide a linear impact test device applicable to the ignition of vehicle airbags.
[0005] To solve the above technical problems, the present utility model adopts the following technical solution: A linear impact test device applicable to the ignition of vehicle airbags, including a linear impact table, a sample fixed mounting frame, a three-axis moving platform, and a pneumatic impact component. The sample fixed mounting frame is arranged on one side of the linear impact table. The linear impact table is composed of a three-axis moving platform and a pneumatic linear impact component. The pneumatic linear impact component is installed on the three-axis moving platform, and an electronic pressure switch is installed on the gas storage tank;
[0006] The pneumatic linear impact assembly includes a lower fixing plate, a cylinder, a cylinder fixing plate, cylinder fixing columns, an impact head push plate, guide columns and a spherical impact head. The lower fixing plate is installed on a three-axis moving platform. A guide sleeve is installed on the lower fixing plate. The left and right fixing plates are connected to the side of the lower fixing plate. The upper fixing plate is connected to the left and right fixing plates. A solenoid valve is installed at the air inlet end of the air storage tank. The front fixing plate is connected to one side of the upper fixing plate, the lower fixing plate and the left and right fixing plates. The cylinder is fixed to the front fixing plate through the cylinder fixing plate and the cylinder fixing columns. The air storage tank is connected to the upper surface of the upper fixing plate. A direct-through solenoid valve and a speed control valve are installed between the air storage tank and the cylinder. The air storage tank is connected to the cylinder through a conduit. The impact head push plate is fixed to the piston rod of the cylinder through two guide columns. The spherical impact head is fixed on the two guide columns. An acceleration sensor is attached to the back of the spherical impact head. The guide columns are in movable contact with the inner surface of the guide sleeve. A connecting plate is fixedly provided at one end of the two guide columns. The guide sleeve fixing plate is connected to the guide sleeve. The guide sleeve fixing plate is installed on the lower fixing plate.
[0007] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0008] The present utility model can fix the sample on the sample fixing and mounting rack. After the piston of the cylinder moves to the end of the stroke and stops moving forward, the spherical impact head continues to move forward by inertia until it hits the sample. The acceleration sensor and the laser velocimeter record the acceleration and speed before and after the impact, so as to accurately detect the test accuracy of the impact force that the airbag can withstand. Description of the Drawings
[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0010] Figure 1 It is a schematic structural diagram of the present utility model.
[0011] Figure 2 It is a schematic structural diagram of the three-axis moving platform of the present utility model.
[0012] Figure 3 It is an exploded structural diagram of the pneumatic impact assembly of the present utility model.
[0013] In the figure: 1. Linear impact table; 2. Sample fixing and mounting bracket; 11. Three-axis moving platform; 12. Pneumatic impact component; 121. Left and right fixing plates; 122. Lower fixing plate; 123. Upper fixing plate; 124. Front fixing plate; 125. Spherical impact head; 126. Guide post; 127. Connecting plate; 128. Cylinder; 129. Guide sleeve; 1210. Guide sleeve fixing plate; 1211. Cylinder fixing plate; 1212. Cylinder fixing column; 1213. Air storage tank; 1214. Impact head push plate. Detailed implementation mode
[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0015] Embodiment: As Figures 1-3 shown, the present invention provides a linear impact test device applicable to vehicle airbag ignition, including a linear impact table 1, a sample fixing and mounting bracket 2, a three-axis moving platform 11 and a pneumatic impact component 12. The sample fixing and mounting bracket 2 is composed of a section steel and a base, and the vertical position of the section steel for installing the sample is adjustable. The sample fixing and mounting bracket 2 is arranged on one side of the linear impact table 1. The linear impact table 1 is composed of a three-axis moving platform 11 and a pneumatic linear impact component 12, and the pneumatic linear impact component 12 is installed on the three-axis moving platform 11;
[0016] The pneumatic linear impact assembly 12 includes a lower fixing plate 122, a cylinder 128, a cylinder fixing plate 1211, cylinder fixing columns 1212, an impact head push plate 1214, guide columns 126 and a spherical impact head 125. The lower fixing plate 122 is installed on the three-axis moving platform 11. A guide sleeve 129 is installed on the lower fixing plate 122. The left and right fixing plates 121 are connected to the side of the lower fixing plate 122. The upper fixing plate 123 is connected to the left and right fixing plates 121. The front fixing plate 124 is connected to one side of the upper fixing plate 123, the lower fixing plate 122 and the left and right fixing plates 121. The cylinder 128 is fixed to the front fixing plate 124 through the cylinder fixing plate 1211 and the cylinder fixing columns 1212. The cylinder 128 needs to be machined with several waist-shaped grooves at the end close to the exhaust to increase the exhaust speed. An air storage tank 1213 is connected to the upper surface of the upper fixing plate 123. The air storage tank 1213 is connected to the cylinder 128 through a conduit. The impact head push plate 1214 is fixed to the piston rod of the cylinder 128 through two guide columns 126. The spherical impact head 125 is fixed on the two guide columns 126. The guide columns 126 are in movable contact with the inner surface of the guide sleeve 129. A connecting plate 127 is fixedly provided at one end of the two guide columns 126. The total weight of the spherical impact head 125 + the guide columns 126 + the connecting plate 127 is 6.5 kg (subject to the test standard), and the ball head diameter is 160 mm (subject to the test standard);
[0017] An electronic pressure switch is installed on the air storage tank 1213. A straight-through solenoid valve and a speed control valve are installed between the air storage tank 1213 and the cylinder 128 to control the air output and speed. A solenoid valve is installed at the air inlet end of the air storage tank 1213. An acceleration sensor is attached to the back of the spherical impact head 125 to cooperate with the electronic pressure switch to control the pressure in the air storage tank 1213.
[0018] Working principle: The sample is fixed on the sample fixing mounting bracket 2. Note: Before testing, use a sponge instead of the sample for debugging to obtain the correct impact speed required for testing. Pull the piston rod of the air cylinder 128 back to the bottom, and then pull the spherical impact head 125 to be adjacent to the impact head push plate 1214. Adjust the distance between the spherical impact head 125 and the sample to ensure that the distance exceeds the stroke of the air cylinder 128. Adjust the position of the spherical impact head 125 so that it is aligned with the point to be tested. Attach sensors required for testing, such as an acceleration sensor, to the back of the spherical impact head 125. Set up a laser velocimeter to measure the speed during impact, and the measurement position is near the impact point of the sample. Set the pressure value of the electronic pressure switch obtained through the previous debugging. Open the air source and the intake solenoid valve to fill the air storage tank 1213 with gas. When the pressure in the air storage tank 1213 reaches the set pressure, the intake solenoid valve receives the signal from the electronic pressure switch and closes to stop inflation. After determining the impact point, open the outlet solenoid valve of the air storage tank 1213, and the stored gas in the air storage tank 1213 is instantaneously released to drive the air cylinder 128 to act. The air cylinder 128 drives the spherical impact head 125 to move forward through the impact head push plate 1214. When the piston of the air cylinder 128 moves to the position of the exhaust groove machined on the air cylinder 128, the thrust of the air cylinder 128 disappears, and the impact head push plate 1214 and the spherical impact head 125 gradually separate. After the piston of the air cylinder 128 moves to the end of the stroke, it stops moving forward, while the spherical impact head 125 continues to move forward by inertia until it impacts the sample. The acceleration sensor and the laser velocimeter record the acceleration and speed before and after the impact. Reset each moving part, disconnect the air source for the next test. Under a certain distance condition, the impact speed can be adjusted by setting the pressure of the air storage tank 1213 and adjusting the speed regulating valve at the outlet of the air storage tank 1213. After testing one point, adjust the three-axis moving stage 11 to align with the next test point and repeat the above steps. If the distances of the test points are different, it is necessary to re-debug to obtain the correct impact speed before starting the formal test.
[0019] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.
Claims
1. A linear impact test device suitable for detonating a vehicle airbag, comprising a linear impact table (1), a sample fixing mounting frame (2), a three-axis moving platform (11) and a pneumatic impact assembly (12), characterized in that: The sample fixing mounting frame (2) is arranged on one side of the linear impact platform (1), and the linear impact platform (1) is composed of a three-axis moving platform (11) and a pneumatic linear impact component (12), and the pneumatic linear impact component (12) is installed on the three-axis moving platform (11); The pneumatic linear impact assembly (12) comprises a lower fixing plate (122), a cylinder (128), a cylinder fixing plate (1211), a cylinder fixing column (1212), an impact head push plate (1214), a guide column (126) and a spherical impact head (125); the lower fixing plate (122) is mounted on a three-axis moving platform (11); a guide sleeve (129) is mounted on the lower fixing plate (122); a side surface of the lower fixing plate (122) is connected to left and right fixing plates (121); the left and right fixing plates (121) are connected to an upper fixing plate (123); the upper fixing plate (123), the lower fixing plate (122) and one side of the left and right fixing plates (121) are connected to a front fixing plate The upper fixing plate (123) is provided with a front fixing plate (124), the cylinder (128) is fixed to the front fixing plate (124) through a cylinder fixing plate (1211) and a cylinder fixing column (1212), the upper surface of the upper fixing plate (123) is connected to a gas storage tank (1213), the gas storage tank (1213) is connected to the cylinder (128) through a conduit, the impact head push plate (1214) passes through two guide columns (126) and is fixed to the piston rod of the cylinder (128), the spherical impact head (125) is fixed to the two guide rod guide columns (126), the guide columns (126) are in active contact with the inner surface of the guide sleeve (129), and one end of the two guide columns (126) is fixed with a connecting plate (127).
2. A linear impact test device suitable for vehicle airbag detonation as claimed in claim 1, characterized in that: An electronic pressure switch is installed on the gas storage tank (1213).
3. A linear impact test device suitable for vehicle airbag detonation as claimed in claim 1, characterized in that: A through solenoid valve and a speed regulating valve are installed between the gas storage tank (1213) and the cylinder (128).
4. A linear impact test device suitable for vehicle airbag detonation as claimed in claim 1, characterized in that: The air inlet end of the air storage tank (1213) is equipped with a solenoid valve.
5. A linear impact test device suitable for vehicle airbag detonation as claimed in claim 1, characterized in that: An acceleration sensor is attached to the back of the spherical impact head (125).
6. A linear impact test device suitable for vehicle airbag detonation as claimed in claim 1, characterized in that: The guide sleeve (129) is connected to a guide sleeve fixing plate (1210), and the guide sleeve fixing plate (1210) is installed on a lower fixing plate (122).