A wheel hub dynamic impact testing device

Abstract

The wheel hub dynamic impact test device provided by the utility model, comprising: a test bench, an impact head freely falling and arranged above the test bench, an accelerometer connected to the impact head, a high-speed camera arranged on one side of the test bench; the test bench comprises a bottom plate, a support column, a sliding sleeve and a support rod, the support column is connected to the bottom plate and extends upward, the sliding sleeve is sleeved on the support column and can slide up and down, the support rod extends in the horizontal direction, one end of the support rod is connected to the sliding sleeve, and the other end is provided with a mounting disc; when the to-be-tested wheel hub is connected to the mounting disc, the lowest point of the to-be-tested wheel hub is supported on the bottom plate, and the highest point of the to-be-tested wheel hub is opposite to the high-speed camera; during the test, the free fall of the impact head can be used to generate impact on the wheel hub, so that the dynamic impact suffered by the wheel hub during the super-conventional collision is simulated, and the force-displacement curve of the wheel hub can be obtained by cooperating with the shooting of the high-speed camera and the detection of the accelerometer, the simulation precision is high, and the test result is more referable.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, specifically to a wheel hub dynamic impact testing device. Background Technology

[0002] Automotive crash tests are the most effective method for comprehensively evaluating vehicle safety performance and one of the mandatory means of verifying vehicle safety performance. With the development of technology, the requirements for vehicle crash safety are becoming increasingly stringent. Automakers need to consider more rigorous vehicle crash tests when developing models. In these tests, the wheel hub plays an important load-bearing role and will undergo large deformation and failure. Therefore, accurate wheel hub mechanical properties and finite element models are crucial for vehicle CAE simulation and design development.

[0003] Most existing wheel hub tests are based on static compression. For example, Chinese patent CN112051042A discloses such a test device. However, this device is difficult to simulate the situation of unconventional collisions and cannot obtain the force-displacement curve of the wheel hub when subjected to high-energy dynamic impacts. The simulation accuracy of the finite element model is relatively low, which provides limited help to wheel hub design. Utility Model Content

[0004] The purpose of this invention is to overcome one or more shortcomings in the prior art and provide a wheel hub dynamic impact testing device.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is a wheel hub dynamic impact testing device, comprising: a test platform, an impact head that can be freely dropped and set above the test platform, an accelerometer connected to the impact head, and a high-speed camera set on one side of the test platform; the test platform includes a base plate, a support column, a sliding sleeve, and a support rod, the support column is connected to the base plate and extends upward, the sliding sleeve is slidably fitted onto the support column, the support rod extends horizontally, one end of the support rod is connected to the sliding sleeve, and the other end is provided with a mounting plate, when the wheel hub to be tested is connected to the mounting plate, its lowest point is supported on the base plate, and its highest point is directly facing the high-speed camera.

[0006] Preferably, the test bench further includes a limiting post connected to the base plate and extending upward, wherein the upper end of the limiting post is lower than the highest point of the wheel hub to be tested and higher than the upper end of the support post.

[0007] Preferably, the support rod extends in the left-right direction, the support column and the limiting column are respectively disposed on the left and right sides of the support rod, and the high-speed camera is disposed in front of the mounting plate.

[0008] Preferably, the impact head includes a mounting plate, an impact block connected to the bottom surface of the mounting plate, and a counterweight block connected to the top surface of the mounting plate. The top surface of the mounting plate has a first countersunk hole for connecting the impact block and a mounting hole for connecting the accelerometer. The bottom surface of the mounting plate has a second countersunk hole for connecting the counterweight block.

[0009] More preferably, there are multiple first countersunk holes arranged in a parallel array to adjust the position of the impact block, and all the first countersunk holes are located within the projection area of ​​the counterweight block on the top surface of the mounting plate.

[0010] More preferably, the high-speed camera is positioned directly in front of the projection area of ​​the impact block on the upper part of the wheel hub to be tested.

[0011] More preferably, the wheel hub dynamic impact testing device further includes an upwardly extending steel structure support, on which a guide rail extending in the vertical direction is connected, and a slider that can slide up and down is provided on the guide rail, and the counterweight is connected to the slider.

[0012] More preferably, there are two guide rails spaced apart in the left-right direction, the slider is mounted on these two guide rails, and the upper end of the counterweight is connected to the middle of the bottom of the slider.

[0013] More preferably, the guide rails are energized to form a magnetic field between the two guide rails, thereby increasing the speed of the slider during free fall.

[0014] More preferably, the wheel hub dynamic impact testing device further includes a horizontal base supporting the base plate and the steel structure bracket.

[0015] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The wheel hub dynamic impact testing device provided by this utility model includes: a test platform, an impact head that can be freely dropped and set above the test platform, an accelerometer connected to the impact head, and a high-speed camera set on one side of the test platform; the test platform includes a base plate, a support column, a sliding sleeve, and a support rod. The support column is connected to the base plate and extends upward. The sliding sleeve is slidably fitted onto the support column. The support rod extends horizontally. One end of the support rod is connected to the sliding sleeve, and the other end is provided with a mounting plate. When the wheel hub to be tested is connected to the mounting plate, the lowest point of the wheel hub to be tested is supported on the base plate, and the highest point of the wheel hub to be tested faces the high-speed camera. During the test, the free fall of the impact head can be used to impact the wheel hub, thereby simulating the dynamic impact suffered by the wheel hub during unconventional collisions. Combined with the shooting of the high-speed camera and the detection of the accelerometer, the force-displacement curve of the wheel hub can be obtained. The simulation accuracy is high, and the test results are more referential. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of a preferred embodiment of the present invention.

[0017] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0018] Figure 3 yes Figure 1 A magnified view of a portion of point B in the middle.

[0019] Figure 4 yes Figure 2 A magnified view of a portion of point C.

[0020] Figure 5 yes Figure 3 The 3D schematic diagram shows the wheel hub being tested, but it has been omitted for easier observation.

[0021] Figure 6 yes Figure 3 A magnified view of the mounting plate from below.

[0022] The components are as follows: 1. Wheel hub to be tested; 10. Test bench; 11. Base plate; 12. Support column; 13. Sliding sleeve; 14. Support rod; 15. Mounting plate; 16. Limiting column; 20. Impact head; 21. Mounting plate; 22. Impact block; 23. Counterweight; 24. First countersunk hole; 25. Mounting hole; 26. Second countersunk hole; 30. Accelerometer; 40. High-speed camera; 50. Steel structure bracket; 51. Guide rail; 52. Slider; 60. Horizontal base. Detailed Implementation

[0023] like Figures 1 to 6 As shown, the wheel hub dynamic impact testing device provided by this utility model includes: a test platform 10, an impact head 20 that can be freely dropped and set above the test platform 10, an accelerometer 30 connected to the impact head 20, and a high-speed camera 40 set on one side of the test platform 10; the test platform 10 includes a base plate 11, a support column 12, a sliding sleeve 13, and a support rod 14. The base plate 11 extends horizontally, the support column 12 is connected to the base plate 11 and extends upward, the sliding sleeve 13 is slidably fitted on the support column 12, and the support rod 14 extends left and right. The left end of the support rod 14 is connected to the sliding sleeve 13, and the right end is provided with a mounting plate 15. When the wheel hub 1 to be tested is connected to the mounting plate 15, the lowest point of the wheel hub 1 to be tested is supported on the base plate 11, and the highest point of the wheel hub 1 to be tested is directly facing the high-speed camera 40.

[0024] The advantage of this setup is that during the test, the free fall of the impact head can be used to impact the wheel hub, thereby simulating the dynamic impact suffered by the wheel hub during an unconventional collision. Combined with high-speed camera shooting and accelerometer detection (subsequent image analysis using digital image correlation method to obtain the displacement of the impact head and the deformation of the wheel hub during the test), the force-displacement curve of the wheel hub can be obtained. The simulation accuracy is high, and the test results are more reliable.

[0025] To avoid excessive deformation of the wheel hub, in this embodiment, the test bench 10 also includes a limiting post 16 connected to the base plate 11 and extending upward. The support post 12 and the limiting post 16 are respectively located on the left and right sides of the support rod 14. The upper end of the limiting post 16 is lower than the highest point of the wheel hub 1 to be tested and higher than the upper end of the support post 12.

[0026] To facilitate adjustment of impact force and impact position, in this embodiment, the impact head 20 includes a mounting plate 21 extending horizontally, an impact block 22 connected to the bottom surface of the mounting plate 21, and a counterweight block 23 connected to the top surface of the mounting plate 21. The top surface of the mounting plate 21 has a first countersunk hole 24 connecting to the impact block 22 and a mounting hole 25 connecting to the accelerometer 30. The bottom surface of the mounting plate 21 has a second countersunk hole 26 connecting to the counterweight block 23. Multiple first countersunk holes 24 are arranged in a parallel array to adjust the position of the impact block 22 (e.g., ...). Figure 6 (As shown by the dashed line), all the first countersunk holes 24 are located in the projection area of ​​the counterweight block 23 on the top surface of the mounting plate 21. To ensure the imaging effect, the high-speed camera 40 is further positioned in front of the mounting plate 15 and directly facing the projection area of ​​the impact block 22 on the upper part of the wheel hub 1 to be tested.

[0027] To ensure the controllable direction of the free fall of the impact head 20, in this embodiment, the wheel hub dynamic impact testing device also includes an upwardly extending steel structure support 50. The height of the steel structure support 50 is ten to twenty meters. A sealing plate 50 is provided on the top of the steel structure support 50. A guide rail 51 extending in the vertical direction is connected inside the steel structure support 50. A slider 52 that can slide up and down is provided on the guide rail 51. The counterweight 23 is connected to the slider 52. Specifically, there are two guide rails 51 and they are spaced apart in the left and right direction. The slider 52 is mounted on these two guide rails 51. The upper end of the counterweight 23 is connected to the middle position of the bottom of the slider 52 to achieve high-energy dynamic impact.

[0028] Since some unconventional collisions require extremely high impact energy, meeting this requirement through free fall would require setting up extremely tall steel structure supports 50 and extremely long guide rails 51, which is not practical. Therefore, in another embodiment, referring to the principles of electromagnetic catapults, railguns, etc., the guide rails 51 are energized to form a magnetic field between the two guide rails 51, so as to increase the speed of the slider 52 during free fall.

[0029] In this embodiment, the wheel hub dynamic impact test device also includes a horizontal base 60 supporting the base plate 11 and the steel structure bracket 50. Preferably, the upper surface of the horizontal base 60 is insulated.

[0030] The wheel hub dynamic impact testing device provided by this utility model can conduct high-speed impact tests in offset collisions with the whole vehicle. The wheel hub force and degree of freedom are close to the state in actual collisions. It can simultaneously measure displacement-load-high-speed video data, and has a simple structure, is easy to install, and has low cost.

[0031] It should be noted that the lifting of the slider can be achieved by means of wire rope, electric hoist, etc., and the temporary fixing of the slider can be achieved by means of movable clamps, etc., all of which are existing technologies and will not be described in detail here.

[0032] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A wheel hub dynamic impact testing device, comprising: The test bench, the impact head that can be freely dropped and set above the test bench, the accelerometer connected to the impact head, and the high-speed camera set on one side of the test bench. Its features are: The test bench includes a base plate, support columns, sliding sleeves, and support rods. The support columns are connected to the base plate and extend upwards. The sliding sleeves are slidably fitted onto the support columns. The support rods extend horizontally. One end of the support rods is connected to the sliding sleeves, and the other end is equipped with a mounting plate. When the wheel hub to be tested is connected to the mounting plate, its lowest point is supported on the base plate, and its highest point faces the high-speed camera.

2. The wheel hub dynamic impact testing device according to claim 1, characterized in that: The test bench also includes a limiting post connected to the base plate and extending upward, the upper end of the limiting post being lower than the highest point of the wheel hub to be tested and higher than the upper end of the support post.

3. The wheel hub dynamic impact testing device according to claim 2, characterized in that: The support rod extends in the left-right direction, and the support column and the limiting column are respectively located on the left and right sides of the support rod. The high-speed camera is located in front of the mounting plate.

4. The wheel hub dynamic impact testing device according to claim 1, characterized in that: The impact head includes a mounting plate, an impact block connected to the bottom surface of the mounting plate, and a counterweight block connected to the top surface of the mounting plate. The top surface of the mounting plate has a first countersunk hole for connecting the impact block and a mounting hole for connecting the accelerometer. The bottom surface of the mounting plate has a second countersunk hole for connecting the counterweight block.

5. The wheel hub dynamic impact testing device according to claim 4, characterized in that: The first countersunk holes are arranged in a parallel array to adjust the position of the impact block. All the first countersunk holes are located within the projection area of ​​the counterweight block on the top surface of the mounting plate.

6. The wheel hub dynamic impact testing device according to claim 5, characterized in that: The high-speed camera is positioned directly above the projection area of ​​the impact block on the upper part of the wheel hub to be tested.

7. The wheel hub dynamic impact testing device according to claim 4, characterized in that: The wheel hub dynamic impact testing device also includes an upwardly extending steel structure support, on which a guide rail extending in the vertical direction is connected, and a slider that can slide up and down is provided on the guide rail, and the counterweight is connected to the slider.

8. The wheel hub dynamic impact testing device according to claim 7, characterized in that: The guide rails are two in number and spaced apart in the left-right direction. The slider is mounted on these two guide rails. The upper end of the counterweight is connected to the middle of the bottom of the slider.

9. The wheel hub dynamic impact testing device according to claim 8, characterized in that: The guide rails are energized, creating a magnetic field between the two rails to increase the speed of the slider during free fall.

10. The wheel hub dynamic impact testing device according to claim 7, characterized in that: The wheel hub dynamic impact testing device also includes a horizontal base that supports the base plate and the steel structure bracket.

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