A device for testing the strength and fatigue performance of an automobile wheel hub

Abstract

The application belongs to the technical field of hub detection, and particularly relates to a device for detecting the strength and fatigue performance of an automobile hub, which comprises a machine body, a detection table fixedly installed on the inner wall of the machine body, a hub body arranged on the top of the detection table, a plurality of stand columns fixedly installed on the top of the detection table, a lower fixing plate fixedly installed between the stand columns, a lower installation ring fixedly installed on the outer wall of the lower fixing plate, the lower installation ring being located above the hub body, and a plurality of slide columns uniformly and slidably installed on the inner wall of the lower installation ring. The hammer heads are distributed in a circumferential array to cover the rim, so that the rim edge can be circularly hammered without any dead angle, and the problem of narrow detection coverage and existence of a blind area in the prior art is solved. The hub edge is comprehensively evaluated, potential defects such as micro cracks and local deformation are effectively avoided, and the accuracy and reliability of detection are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of wheel hub testing technology, specifically a device for testing the strength and fatigue performance of automobile wheel hubs. Background Technology

[0002] In today's booming automotive industry, the strength and fatigue performance of car wheels, as a crucial component of the vehicle's driving system, directly affect the vehicle's driving safety and reliability. Wheels not only need to bear the weight of the vehicle itself, but also need to cope with various complex impacts and alternating loads from the road surface during driving. Therefore, accurately assessing the strength and fatigue performance of wheel wheels is of vital importance for ensuring the safe operation of automobiles, extending the service life of wheel wheels, and optimizing automobile design.

[0003] During actual vehicle operation, the working conditions faced by wheel hubs are particularly complex, especially the rim edges. As the wheel rotates, each point on the rim will take turns bearing different impacts from the road surface. Current wheel hub testing technologies mostly apply load to a single point, which cannot reproduce the real working condition of "the rim edge repeatedly bearing road impacts" during vehicle operation (when the vehicle is moving, the rim edge rotates with the wheel, and each point will take turns bearing the impact of potholes and stones). This results in the test data being out of touch with the actual use scenario of the wheel hub, and its reference value is limited.

[0004] Therefore, the present invention provides a device for testing the strength and fatigue performance of automobile wheel hubs. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The automobile wheel hub strength and fatigue performance testing device of the present invention includes a body, a testing platform is fixedly installed on the inner wall of the body, a wheel hub body is provided on the top of the testing platform, a plurality of columns are fixedly installed on the top of the testing platform, a lower fixing plate is fixedly installed between the columns, a lower mounting ring is fixedly installed on the outer wall of the lower fixing plate, the lower mounting ring is located above the wheel hub body, a plurality of sliding columns are evenly slidably installed on the inner wall of the lower mounting ring, a hammer head is detachably installed on one end of each sliding column, the hammer head is in contact with the wheel hub body, a lifting assembly is provided on the inner side of the lower mounting ring, the lifting assembly is used to drive the sliding columns to reciprocate up and down, and a testing assembly is provided on the top of the testing platform.

[0007] Preferably, the lifting assembly includes a drive motor, a positioning assembly is provided between the drive motor and the column, a drive shaft is fixedly installed at the output end of the drive motor, an upper turntable is fixedly installed on the outer wall of the drive shaft, a plurality of connecting columns are evenly fixedly installed on the inner wall of the upper turntable, an installation block is fixedly installed at one end of each connecting column, an arc-shaped plate is fixedly installed on the outer wall of each installation block, and a force-bearing plate is fixedly installed on the outer wall of each sliding column, the number of force-bearing plates being the same as the number of arc-shaped plates.

[0008] Preferably, an elastic element is fixedly installed on the side of the hammer head near the sliding column, and the elastic element is respectively sleeved on the outside of the sliding column.

[0009] Preferably, the number of sliding columns is even, and the sliding columns are grouped in pairs. An adjusting plate is slidably installed between the outer walls of each group of sliding columns. The end of the elastic element away from the hammer head is fixedly connected to the corresponding adjusting plate. An adjusting screw is rotatably installed on the inner wall of each adjusting plate. The outer wall of each adjusting screw is threadedly connected to the inner wall of the lower mounting ring. A knob is fixedly installed on one end of each adjusting screw.

[0010] Preferably, the positioning component includes an upper fixing plate, which is fixedly installed between the columns. An upper mounting ring is fixedly installed on the outer wall of the upper fixing plate, and a mounting bracket is fixedly installed on the inner side of the upper mounting ring. The drive motor is fixedly installed at the center of the mounting bracket.

[0011] Preferably, a plurality of proximity switches are fixedly installed on the bottom inner wall of the upper mounting ring, and the proximity switches are respectively located directly above the sliding column, and a plurality of counters are fixedly installed on the top inner wall of the upper mounting ring.

[0012] Preferably, a lower turntable is fixedly installed at one end of the drive shaft. A plurality of connecting plates are evenly arranged on the inner wall of the lower turntable. A torsion spring shaft is installed between each connecting plate and the lower turntable. A receiving plate is fixedly installed at one end of each connecting plate. A brush is fixedly installed on the inner wall of each receiving plate. A wear-resistant rubber block is fixedly installed at the bottom of each receiving plate. The wear-resistant rubber block and the brush are in contact with the wheel hub body. The number of receiving plates is the same as the number of hammers.

[0013] Preferably, the detection assembly includes a detection ring, which is sleeved on the outer side of the hub body. An industrial camera, a laser displacement sensor, and an eddy current detection probe are installed on the inner wall of the detection ring. Fastening structures are symmetrically fixed on the outer wall of the detection ring, and the fastening structures are respectively installed on the outer walls of two of the columns.

[0014] Preferably, the top of the testing platform is symmetrically fixedly mounted with upright plates, and the inner wall of each upright plate is threaded with positioning screws. One end of each positioning screw is rotatably mounted with a clamping plate, and the clamping plate is in contact with the wheel hub body. The other end of each positioning screw is fixedly mounted with a rotating ring.

[0015] Preferably, a control panel is fixedly installed on the inner wall of the machine body, and the inner wall of the control panel is provided with control buttons and a display screen. A protective door is hinged to the outer wall of the machine body, and a transparent observation window is fixedly installed on the inner wall of the protective door.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. The hammers are arranged in a circular array to cover the rim, achieving 360-degree cyclic hammering of the rim edge without blind spots. This completely solves the problem of narrow detection coverage and blind spots in existing technologies. This invention provides a comprehensive evaluation of the wheel hub edge, effectively avoiding the omission of potential defects such as micro-cracks and local deformation due to local detection, and greatly improving the accuracy and reliability of detection.

[0018] 2. The lifting component drives the cyclical movement of the hammer head to accurately simulate the circumferential, repeated, and uniform stress state of the wheel rim edge, making the test data closer to the actual use conditions. This allows for a more realistic reflection of the strength and fatigue performance of the wheel hub during actual driving, providing a more accurate basis for the quality assessment of the wheel hub and solving the problem of distortion in the simulation of working conditions in existing technologies.

[0019] 3. By rotating the knob to drive the adjusting screw, the adjusting plate is raised or lowered, thus changing the preload of the elastic element. This allows the hammers corresponding to each set of sliding pillars to strike the wheel hub body with different impact forces. This enables the testing device to simulate various impact conditions that the wheel hub may encounter in actual use, such as the force difference when driving on ordinary roads and passing over potholes, speed bumps, and other road conditions. It comprehensively tests the performance of the wheel hub under different impact forces, greatly expands the testing function, and meets the need for multi-dimensional evaluation of wheel hub performance. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the body of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the detection stage of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the hub body of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure at the lower mounting ring of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the adjusting plate of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure at the upper mounting ring of the present invention;

[0028] Figure 8 This is a schematic diagram of the mounting bracket structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure at the lower turntable of the present invention;

[0030] Figure 10 This is a schematic diagram of the structure of the receiving plate of the present invention;

[0031] Figure 11 This is a schematic diagram of the structure of the upright plate of the present invention.

[0032] In the diagram: 1. Machine body; 2. Testing platform; 3. Hub body; 4. Column; 5. Lower fixing plate; 6. Lower mounting ring; 7. Sliding column; 8. Hammer head; 9. Drive motor; 10. Drive shaft; 11. Upper turntable; 12. Connecting column; 13. Mounting block; 14. Arc plate; 15. Force plate; 16. Elastic element; 17. Adjusting plate; 18. Adjusting screw; 19. Knob; 20. Upper fixing plate; 21. Upper mounting ring; 22. Mounting bracket; 23. Proximity switch; 24. Counter; 25. Lower turntable; 26. Connecting plate; 27. Torsion spring shaft; 28. Support plate; 29. ​​Brush; 30. Wear-resistant rubber block; 31. Testing ring; 32. Fastening structure; 33. Upright plate; 34. Positioning screw; 35. Clamping plate; 36. Rotating ring; 37. Control panel; 38. Protective door; 39. Transparent observation window. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] like Figures 1 to 7As shown in the embodiment of the present invention, an automotive wheel hub strength and fatigue performance testing device includes a body 1. A testing platform 2 is fixedly installed on the inner wall of the body 1. A wheel hub body 3 is disposed on the top of the testing platform 2. A plurality of columns 4 are fixedly installed on the top of the testing platform 2. A lower fixing plate 5 is fixedly installed between the columns 4. A lower mounting ring 6 is fixedly installed on the outer wall of the lower fixing plate 5. The lower mounting ring 6 is located above the wheel hub body 3. A plurality of sliding pillars 7 are evenly slidably installed on the inner wall of the lower mounting ring 6. A hammer head 8 is detachably installed at one end of each sliding pillar 7. All 8 are fitted to the wheel hub body 3. A lifting assembly is provided on the inner side of the lower mounting ring 6. The lifting assembly is used to drive the sliding column 7 to reciprocate up and down. A detection assembly is provided above the detection platform 2. The wheel hub is placed on the detection platform 2 and fixed. The hammers 8 are distributed in a circumferential array around the rim of the wheel hub. Then the device is started for detection. After the device is started, the lifting assembly will cause each sliding column 7 to reciprocate up and down on the lower mounting ring 6 synchronously. When the sliding column 7 rises, it will drive the hammer 8 to move upward. When the sliding column 7 falls, the hammer 8 will fall and strike the wheel hub body. 3. The detection component performs real-time detection of the state of the wheel hub body 3. In summary, the hammers 8 are distributed in a circumferential array to cover the rim, achieving 360-degree cyclic hammering of the rim edge without blind spots. This completely solves the problem of narrow detection coverage and blind spots in existing technologies. This invention provides a comprehensive evaluation of the wheel hub edge, effectively avoiding the omission of potential defects such as micro-cracks and local deformation due to local detection, greatly improving the accuracy and reliability of the detection. The lifting component drives the cyclic movement of the hammers 8, accurately simulating the circumferential, repeated, and uniform stress state of the rim edge, making the detection data closer to the actual use conditions. It can more realistically reflect the strength and fatigue performance of the wheel hub in actual driving, providing a more accurate basis for the quality assessment of the wheel hub and solving the problem of distortion in the simulation of working conditions in existing technologies. The lifting component causes each sliding column 7 to reciprocate and rise synchronously, thereby driving the hammers 8 to hammer the wheel hub synchronously. This synchronous operation method greatly shortens the detection time and improves the detection efficiency, which can meet the needs of large-scale wheel hub detection, especially suitable for the batch detection process of automobile manufacturing enterprises.

[0035] like Figures 3 to 7As shown, the lifting assembly includes a drive motor 9, a positioning assembly between the drive motor 9 and the column 4, a drive shaft 10 fixedly mounted at the output end of the drive motor 9, an upper turntable 11 fixedly mounted on the outer wall of the drive shaft 10, and a plurality of connecting columns 12 evenly fixedly mounted on the inner wall of the upper turntable 11. An mounting block 13 is fixedly mounted at one end of each connecting column 12, and an arc-shaped plate 14 is fixedly mounted on the outer wall of each mounting block 13. A force-bearing plate 15 is fixedly mounted on the outer wall of each sliding column 7. The number of force-bearing plates 15 is the same as the number of arc-shaped plates 14. The number of 4 is the same; after the device is started, the drive motor 9 will drive the upper turntable 11 to rotate at a constant speed through the drive shaft 10. When the upper turntable 11 rotates, it will drive the connecting column 12 to rotate. When the connecting column 12 rotates, it will drive the arc plate 14 to rotate through the mounting block 13. A force plate 15 is installed on each sliding column 7, and the force plate 15 is located on the rotation path of the arc plate 14. Therefore, when the arc plate 14 rotates, it will squeeze the force plate 15. After being squeezed, the force plate 15 will move upward, thereby driving the sliding column 7 to... The upward movement of the sliding column 7 causes the hammer head 8 to move upward. When the arc-shaped plate 14 passes the force plate 15, the force plate 15 loses its support and falls, causing the hammer head 8 to fall and strike the wheel hub body 3, thus completing the inspection of the wheel hub body 3. The drive motor 9 drives the upper turntable 11 to rotate at a constant speed, causing the arc-shaped plate 14 to rotate continuously and periodically press against the force plate 15, resulting in the sliding column 7 and hammer head 8 reciprocating up and down motion, forming a continuous cyclic hammering of the wheel hub edge. This continuous hammering method can... This more realistically simulates the repeated stress experienced by the wheel hub during actual driving, effectively detecting potential strength and fatigue issues in the wheel hub during long-term use, such as crack propagation and material fatigue. The number of arc-shaped plates 14 and force-bearing plates 15 is the same. When the drive motor 9 drives the upper turntable 11 to rotate, each arc-shaped plate 14 can simultaneously press the corresponding force-bearing plate 15, causing each sliding column 7 to move upward synchronously, thereby allowing all hammers 8 to rise simultaneously. This facilitates the placement and removal of the wheel hub body 3, improving the convenience and efficiency of the operation.

[0036] like Figure 6 As shown, elastic elements 16 are fixedly installed on the side of the hammer head 8 near the sliding column 7, and the elastic elements 16 are respectively sleeved on the outside of the sliding column 7. When the hammer head 8 moves upward, it will squeeze the elastic elements 16 to put them in a contracted state. When the force plate 15 loses the support of the arc plate 14, the elastic force of the elastic elements 16 is released, so that the hammer head 8 falls quickly and hits the wheel hub body 3. The elastic force released by the elastic element 16 after contraction and energy storage is relatively constant, which can ensure that the force of the hammer head 8 hitting the wheel hub is highly consistent each time, which greatly improves the accuracy and reliability of the test data, makes the test results more realistically reflect the performance status of the wheel hub, and can effectively avoid the occurrence of jamming problems, ensuring that the hammer head 8 can hit the wheel hub smoothly and stably every time, providing a stable impact force for the test.

[0037] like Figure 6As shown, the number of sliding columns 7 is even, with each pair of sliding columns 7 forming a group. An adjusting plate 17 is slidably installed between the outer walls of each group of sliding columns 7. The end of the elastic element 16 furthest from the hammer head 8 is fixedly connected to the corresponding adjusting plate 17. Adjusting screws 18 are rotatably installed on the inner walls of each adjusting plate 17. The outer walls of each adjusting screw 18 are threadedly connected to the inner wall of the lower mounting ring 6. A knob 19 is fixedly installed on one end of each adjusting screw 18. During testing, rotating the knob 19 drives the adjusting screw 18 to rotate, and the adjusting screw 18... The engagement of the threaded lower mounting ring 6 with the adjusting plate 17 causes it to rise and fall. During this movement, the adjusting plate 17 changes the preload of the elastic element 16. By adjusting the preload of the elastic element 16, the hammers 8 corresponding to each set of sliding pillars 7 can strike the wheel hub body 3 with different impact forces. This allows for the detection of the wheel hub body 3 under different impact forces. Since the preload of the two elastic elements 16 on each set of sliding pillars 7 is fixed by an adjusting plate 17, the two hammers 8 corresponding to each set of two sliding pillars 7 will strike with the same force. By rotating the knob 19 to drive the adjusting screw 18 to rotate, and then raising and lowering the adjusting plate 17 to change the preload of the elastic element 16, the hammers 8 corresponding to each set of sliding columns 7 can strike the wheel hub body 3 with different impact forces. This allows the testing device to simulate various impact conditions that the wheel hub may encounter in actual use, such as the force difference between driving on ordinary roads and passing through potholes, speed bumps, and other different road conditions. It can comprehensively test the performance of the wheel hub under different impact forces, greatly expand the testing function, and meet the needs of multi-dimensional evaluation of wheel hub performance. Since the two hammers 8 corresponding to each set of two sliding columns 7 will strike the wheel hub body 3 with the same force, different parts of the same wheel hub can be compared and tested during the testing process. This provides a more detailed basis for the quality control and improvement of the wheel hub, prevents deviations in test results caused by accidental factors such as unstable impact force of a single hammer 8 or uneven material in the local area of ​​the wheel hub, and improves the reliability and stability of the test results.

[0038] like Figures 3 to 4 and Figure 7 As shown, the positioning assembly includes an upper fixing plate 20, which is fixedly installed between the columns 4. An upper mounting ring 21 is fixedly installed on the outer wall of the upper fixing plate 20, and a mounting bracket 22 is fixedly installed on the inner side of the upper mounting ring 21. The drive motor 9 is fixedly installed at the center of the mounting bracket 22. The upper fixing plate 20 is fixed between the columns 4 to form a stable frame structure. The upper mounting ring 21 is then fixed to the columns 4 through the upper fixing plate 20. The drive motor 9 is fixedly installed at the center of the mounting bracket 22, and the mounting bracket 22 is fixed to the upper mounting ring 21, which can provide a reliable fulcrum for the drive motor 9 and ensure the stability of the drive motor 9's operation.

[0039] like Figures 7 to 8 As shown, several proximity switches 23 are fixedly installed on the bottom inner wall of the upper mounting ring 21, and the proximity switches 23 are respectively located directly above the sliding column 7. Several counters 24 are fixedly installed on the top inner wall of the upper mounting ring 21. Multiple proximity switches 23 are installed at the bottom of the upper mounting ring 21, and each proximity switch 23 is precisely positioned directly above the corresponding sliding column 7. When the sliding column 7 moves the hammer head 8 upward into the sensing range of the proximity switch 23, the proximity switch 23 can quickly and accurately sense the position change of the sliding column 7 and transmit the signal to the counter 24. The counter 24 performs accurate counting based on the received signal, ensuring that each impact of the hammer head 8 on the wheel hub can be accurately recorded, providing a reliable data basis for the quality assessment of the wheel hub. In fatigue testing, the hammer head 8 needs to repeatedly impact the wheel hub at a high frequency or for a long time. The proximity switches 23 have a fast response speed, which can ensure the accuracy and stability of the counting, meeting the needs of fatigue testing for recording a large number of impacts. By recording the number of times the hammer head 8 impacts the wheel hub and its... By combining the changes in the wheel hub's condition during the testing process, the quality of the wheel hub can be evaluated more scientifically. After reaching a certain number of impacts, the wheel hub is observed for damage such as cracks and deformation, and its fatigue resistance and strength are analyzed. This quality assessment method based on the actual number of impacts and the wheel hub's condition can more realistically reflect the wheel hub's performance in actual use, providing a strong basis for wheel hub production and improvement. During the testing process, if the proximity switch 23 fails to sense the upward movement of the sliding column 7 as expected, or if an abnormality is found in the counts of each counter 24, it may mean that the testing device has malfunctioned. By monitoring the working status of the proximity switch 23 and the counter 24 in real time, these abnormalities can be detected in time, and an early warning signal can be issued to remind the operator to stop the testing and carry out inspection and maintenance, so as to avoid more serious damage or safety accidents caused by device failure. It should be noted that the proximity switch 23 and the counter 24 can work together to send the values ​​to the terminal in real time without entering the equipment to observe the counter 24.

[0040] like Figure 7 and Figures 9 to 10As shown, a lower turntable 25 is fixedly installed at one end of the drive shaft 10. Several connecting plates 26 are evenly arranged on the inner wall of the lower turntable 25. Torsion spring shafts 27 are installed between each connecting plate 26 and the lower turntable 25. A receiving plate 28 is fixedly installed at one end of each connecting plate 26. A brush 29 is fixedly installed on the inner wall of each receiving plate 28. A wear-resistant rubber block 30 is fixedly installed at the bottom of each receiving plate 28. Both the wear-resistant rubber block 30 and the brush 29 are in contact with the wheel hub body 3, supporting the bearing... The number of plates 28 is the same as the number of hammers 8. During the testing process, the lower turntable 25 rotates along with the drive shaft 10. The rotation of the lower turntable 25 drives the connecting plate 26 to rotate, which in turn drives the brush 29 to rotate via the receiving plate 28. As the hammers 8 move upwards, the brush 29 slides across the surface of the hub where the hammers 8 strike. That is, before each hammer strike, the brush 29 passes under the hammer, thus... The hammerhead 8 is used to clean the area it strikes. After the hammerhead 8 reciprocates and impacts the surface of the wheel hub body 3, metal powder is generated on the surface of the wheel hub body 3. This metal powder mixed with dust will change the hammer contact area, causing the test data to be distorted. The brush 29 cleans the striking area to avoid the accumulation of powder and the distortion of force, thus ensuring the accuracy of the test results. When the hammerhead 8 falls and impacts the surface of the wheel hub body 3, the vibration generated by the impact will be transmitted to the wear-resistant rubber block 30. The wear-resistant rubber block 30 will drive the brush 29 to vibrate through the receiving plate 28. This vibration can effectively shake off the powder and dust adsorbed on the surface of the brush 29, keeping the brush 29 clean and ensuring that the brush 29 can continue to perform a good cleaning effect in the subsequent cleaning process, forming a virtuous cycle of self-cleaning. The torsion spring shaft 27 uses its own elasticity to make the wear-resistant rubber block 30 and the brush 29 fit against the wheel hub, ensuring its cleaning effect.

[0041] like Figure 3 As shown, the detection assembly includes a detection ring 31, which is sleeved on the outside of the wheel hub body 3. An industrial camera, a laser displacement sensor, and an eddy current detection probe are installed on the inner wall of the detection ring 31. Fastening structures 32 are symmetrically fixed on the outer wall of the detection ring 31, and the fastening structures 32 are respectively installed on the outer wall of two of the columns 4. An industrial camera, a laser displacement sensor, and an eddy current detection probe are installed on the inner side of the detection ring 31. The industrial camera is used to acquire images of the wheel hub surface in real time and identify cracks. The laser displacement sensor is used to detect the deformation of the wheel rim edge. The eddy current detection probe is used for non-contact surface defect detection, thereby realizing multi-faceted detection of the wheel hub. The height of the detection ring 31 can be adjusted by the fastening structure 32, which facilitates detection and the placement and removal of the wheel hub body 3.

[0042] like Figure 11As shown, upright plates 33 are symmetrically fixedly installed on the top of the testing table 2. Positioning screws 34 are threadedly installed on the inner wall of each upright plate 33. A clamping plate 35 is rotatably installed on one end of each positioning screw 34. The clamping plate 35 is in contact with the wheel hub body 3. A rotating ring 36 is fixedly installed on the other end of each positioning screw 34. Before the testing work is carried out, the wheel hub body 3 is placed between the two clamping plates 35. By rotating the rotating ring 36, the positioning screws 34 are rotated, thereby bringing the two clamping plates 35 closer to each other. The clamping plates 35 clamp and position the wheel hub body 3, preventing the wheel hub body 3 from shifting during subsequent testing. This ensures the stability of the wheel hub position during testing, thereby ensuring that the test data can truly reflect the strength and fatigue performance of the wheel hub.

[0043] like Figures 1 to 2 As shown, a control panel 37 is fixedly installed on the inner wall of the machine body 1. The inner wall of the control panel 37 is equipped with control buttons and a display screen. A protective door 38 is hinged to the outer wall of the machine body 1. A transparent observation window 39 is fixedly installed on the inner wall of the protective door 38. The control buttons and display screen on the control panel 37 form an intuitive operating interface. The operator can easily start and stop the detection device and adjust the detection parameters, such as impact force and detection frequency, through the control buttons to achieve precise control of the detection process. The display screen can display detection data, operating status, and fault information in real time. The protective door 38 can be closed when the detection device is running to isolate the detection area from the outside world. The transparent observation window 39 provides the operator with a window to observe the detection process in real time.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the strength and fatigue performance of automobile wheel hubs, comprising a body (1), characterized in that: A testing platform (2) is fixedly installed on the inner wall of the machine body (1). A hub body (3) is set on the top of the testing platform (2). Several columns (4) are fixedly installed on the top of the testing platform (2). A lower fixing plate (5) is fixedly installed between the columns (4). A lower mounting ring (6) is fixedly installed on the outer wall of the lower fixing plate (5). The lower mounting ring (6) is located above the hub body (3). Several sliding columns (7) are evenly slidably installed on the inner wall of the lower mounting ring (6). A hammer head (8) can be detachably installed on one end of each sliding column (7). The hammer heads (8) are all in contact with the hub body (3). A lifting component is set on the inner side of the lower mounting ring (6). The lifting component is used to drive the sliding column (7) to reciprocate up and down. A testing component is set on the top of the testing platform (2).

2. The automobile wheel hub strength and fatigue performance testing device according to claim 1, characterized in that: The lifting assembly includes a drive motor (9), a positioning assembly is provided between the drive motor (9) and the column (4), a drive shaft (10) is fixedly installed at the output end of the drive motor (9), an upper turntable (11) is fixedly installed on the outer wall of the drive shaft (10), a number of connecting columns (12) are evenly fixedly installed on the inner wall of the upper turntable (11), an installation block (13) is fixedly installed at one end of each connecting column (12), an arc plate (14) is fixedly installed on the outer wall of each installation block (13), and a force plate (15) is fixedly installed on the outer wall of each sliding column (7), the number of force plates (15) is the same as the number of arc plates (14).

3. The automobile wheel hub strength and fatigue performance testing device according to claim 1, characterized in that: Each hammerhead (8) has an elastic element (16) fixedly installed on the side near the slide column (7), and the elastic element (16) is respectively sleeved on the outside of the slide column (7).

4. The automobile wheel hub strength and fatigue performance testing device according to claim 3, characterized in that: The number of sliding columns (7) is even, and the sliding columns (7) are grouped in pairs. An adjusting plate (17) is slidably installed between the outer walls of each group of sliding columns (7). The end of the elastic element (16) away from the hammer (8) is fixedly connected to the corresponding adjusting plate (17). An adjusting screw (18) is rotatably installed on the inner wall of each adjusting plate (17). The outer wall of each adjusting screw (18) is threadedly connected to the inner wall of the lower mounting ring (6). A knob (19) is fixedly installed on one end of each adjusting screw (18).

5. The automobile wheel hub strength and fatigue performance testing device according to claim 2, characterized in that: The positioning component includes an upper fixing plate (20), which is fixedly installed between the columns (4). An upper mounting ring (21) is fixedly installed on the outer wall of the upper fixing plate (20), and a mounting bracket (22) is fixedly installed on the inner side of the upper mounting ring (21). The drive motor (9) is fixedly installed at the center of the mounting bracket (22).

6. The automobile wheel hub strength and fatigue performance testing device according to claim 5, characterized in that: A number of proximity switches (23) are fixedly installed on the bottom inner wall of the upper mounting ring (21). The proximity switches (23) are located directly above the slide column (7). A number of counters (24) are fixedly installed on the top inner wall of the upper mounting ring (21).

7. The automobile wheel hub strength and fatigue performance testing device according to claim 2, characterized in that: One end of the drive shaft (10) is fixedly mounted with a lower turntable (25). The inner wall of the lower turntable (25) is evenly provided with a number of connecting plates (26). A torsion spring shaft (27) is installed between the connecting plate (26) and the lower turntable (25). One end of the connecting plate (26) is fixedly mounted with a receiving plate (28). The inner wall of the receiving plate (28) is fixedly mounted with a brush (29). The bottom of the receiving plate (28) is fixedly mounted with a wear-resistant rubber block (30). The wear-resistant rubber block (30) and the brush (29) are both in contact with the hub body (3). The number of receiving plates (28) is the same as the number of hammers (8).

8. The automobile wheel hub strength and fatigue performance testing device according to claim 1, characterized in that: The detection assembly includes a detection ring (31), which is sleeved on the outside of the hub body (3). An industrial camera, a laser displacement sensor and an eddy current detection probe are installed on the inner wall of the detection ring (31). Fastening structures (32) are symmetrically fixed on the outer wall of the detection ring (31), and the fastening structures (32) are respectively installed on the outer walls of two of the columns (4).

9. The automobile wheel hub strength and fatigue performance testing device according to claim 1, characterized in that: The top of the testing platform (2) is symmetrically fixed with upright plates (33), and the inner wall of the upright plates (33) is threaded with positioning screws (34). One end of each positioning screw (34) is rotatably mounted with a clamping plate (35), and the clamping plate (35) is in contact with the hub body (3). The other end of each positioning screw (34) is fixedly mounted with a rotating ring (36).

10. The automobile wheel hub strength and fatigue performance testing device according to claim 1, characterized in that: A control panel (37) is fixedly installed on the inner wall of the body (1). The inner wall of the control panel (37) is provided with control buttons and a display screen. A protective door (38) is hinged to the outer wall of the body (1). A transparent observation window (39) is fixedly installed on the inner wall of the protective door (38).

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