Multi-working-condition simulation steering knuckle fatigue life testing device

Abstract

The invention provides a multi-working-condition simulation steering knuckle fatigue life testing device which comprises a testing base, a mounting base is arranged on the upper surface of the testing base, a mounting column is arranged at one end of a testing beam, and the mounting column is rotatably arranged on the mounting base in a penetrating mode in a lifting mode. One end of the testing beam is provided with a testing base, the other end of the testing beam is provided with a walking mechanism and a first connecting frame hinged to the mounting end of the steering knuckle body, the testing beam is provided with a linkage mechanism connected with the loading end of the steering knuckle body, the steering knuckle body is detachably provided with a damper, and the end of the damper is provided with a ball which abuts against the testing base. The test base is provided with a blocking mechanism which can form a protrusion on the rolling path of the balls. The device can simulate the real use condition of the steering knuckle main body in the test process, and also can form a bulge on the rolling path of the ball through the blocking mechanism to simulate the use state of the steering knuckle main body on a bumpy road surface, so that the authenticity of the test process can be further improved, and the test result is more reliable.

Description

Technical Field

[0001] The invention relates to the technical field of steering knuckle testing, and in particular to a multi-working condition simulation steering knuckle fatigue life testing device. Background Art

[0002] The steering knuckle is a critical component in automotive safety, and its fatigue life directly impacts vehicle safety and reliability. Currently, fatigue testing of steering knuckles has become a crucial step in automotive component quality inspection. Traditional steering knuckle fatigue testing equipment typically employs a single loading method or simulates fixed operating conditions, applying a constant or regularly varying load to test the knuckle's fatigue performance under specific conditions. For example, the Chinese invention patent with publication number CN106546498B provides a tool and test method for steering knuckle fatigue testing. The simulated vehicle body weight is loaded onto the steering knuckle through a simulated loading mechanism, and the simulated vehicle body weight is quantified through the elastic deformation of the bushing, so as to determine when the vehicle body weight is reached. On this basis, fatigue performance testing is carried out, thereby improving the confidence level of fatigue performance testing.

[0003] However, in actual use, the steering knuckle of a car will face complex and changeable road conditions, especially when driving on bumpy roads. The steering knuckle not only has to withstand the vertical impact force, lateral force and longitudinal force from the road surface, but also the high-frequency vibration and irregular alternating load caused by the uneven road surface.

[0004] Existing steering knuckle fatigue testing equipment often fails to accurately simulate this complex and random multi-condition load environment, making it difficult to reproduce the actual stress state of the steering knuckle when driving on bumpy roads. This leads to a discrepancy between the fatigue failure mode of the steering knuckle during actual use and the test results. The fatigue life data obtained from the test cannot accurately reflect the performance of the steering knuckle under real-world road conditions, reducing the authenticity and reliability of the test results. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention proposes a multi-working condition simulation steering knuckle fatigue life test device to solve the technical problem proposed in the above background technology that the existing fatigue test for the steering knuckle cannot simulate the actual use of the steering knuckle on a relatively bumpy road, and there is a certain deviation between the actual use and the test results, which leads to the test results being not true and reliable.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-working condition simulation steering knuckle fatigue life test device, comprising: A test base, the upper surface of which is provided with a mounting seat; The test beam has a mounting post at one end, the mounting post being rotatably and liftably mounted on the mounting seat, and a walking mechanism and a first connecting frame hinged to the mounting end of the steering knuckle body at the other end; a linkage mechanism, disposed on the test beam and connected to the loading end of the steering knuckle body, to convert the rotation of the test beam into driving the steering knuckle body to swing back and forth along its mounting end; a damper, detachably mounted on the steering knuckle body, with a ball disposed at its end, the ball abutting against the test base; and The blocking mechanism is arranged on the test base to form a protrusion on the rolling path of the ball.

[0007] In a preferred embodiment, the walking mechanism includes an extension frame, which is provided at an end of the test beam away from the mounting seat, and a first walking wheel driven to rotate by a driving motor is provided on the extension frame.

[0008] In a preferred embodiment, the linkage mechanism includes: A mounting sleeve is provided at the end of the test beam, wherein a drive shaft is rotatably inserted into the mounting sleeve; a first transmission assembly, disposed on the mounting base and connected to the test beam and the drive shaft, so as to convert the rotation of the test beam into driving the drive shaft to rotate; and The second transmission assembly is provided on the driving shaft and connected to the loading end of the steering knuckle body to convert the rotation of the driving shaft into driving the steering knuckle body to swing back and forth along the first connecting frame.

[0009] In a preferred embodiment, the first transmission assembly includes: a bevel gear disposed on the drive shaft; and The bevel gear disc is arranged on the mounting seat and meshes with the bevel gear.

[0010] In a preferred embodiment, the second transmission assembly includes: a second connecting frame, hinged to the loading end of the steering knuckle body; A sliding frame is slidably arranged on the test beam along an extension direction of the test beam; a first driving rod, one end of which is hinged to the second connecting frame, and the other end of which is hinged to the sliding frame; a drive plate disposed on the drive shaft; and The second driving rod has one end hinged to the sliding frame and the other end eccentrically hinged to the driving disk.

[0011] In a preferred embodiment, the blocking mechanism includes: A support base is provided at the bottom of the test base, and the test base is liftably provided on the support base; a first hydraulic rod, disposed on the support base, with a telescopic end thereof connected to the test base; and The protrusion is arranged on the support base. The test base is provided with a plurality of through slots in a circumferential direction. The protrusion is arranged in the through slots in a liftable manner.

[0012] In a preferred embodiment, the end of the protrusion is provided with a chamfer, and a detachable test plate is provided, and the surface of the test plate is provided with textures.

[0013] In a preferred embodiment, the test base is further provided with a loading mechanism connected to the test beam, and pressure loading is applied to the test beam via the loading mechanism.

[0014] In a preferred embodiment, the loading mechanism includes: A support arm, one end of which is rotatably sleeved on the mounting seat, and the other end of which is provided with a second walking wheel abutting against the test base; A loading arm is hinged on the mounting sleeve, one end of which is provided with a clamping frame, a connecting seat is provided on the test beam, the clamping frame is clamped on the connecting seat, and the other end of which is provided with a loading plate; and The second hydraulic rod is arranged on the support arm, and the telescopic end of the second hydraulic rod abuts against the loading plate.

[0015] In a preferred embodiment, a pressure sensor is provided in the clamping frame, and the pressure sensor abuts against the upper surface of the connecting seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects: When the device performs a fatigue test on the steering knuckle, the mounting end of the steering knuckle body can be connected to the first connecting frame, the loading end of the steering knuckle body can be connected to the linkage mechanism, and the damper can be installed on the steering knuckle body. The test beam can be controlled to rotate along the mounting seat through the walking mechanism to drive the ball to roll on the surface of the test base. During the rotation of the test beam, the steering knuckle body can be controlled to swing back and forth along the first connecting frame through the linkage mechanism to perform a fatigue test on the steering knuckle. The test process can simulate the actual use of the steering knuckle body. The blocking mechanism can also form a protrusion on the rolling path of the ball to simulate the use state of the steering knuckle body on a bumpy road, thereby further improving the authenticity of the test process and making the test results more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a multi-working condition simulation steering knuckle fatigue life test device provided by the present invention; Figure 2 This is a schematic structural diagram of a test base in a multi-working condition simulation steering knuckle fatigue life test device of the present invention; Figure 3 This is a schematic diagram of the installation structure of a steering knuckle in a multi-working condition simulation steering knuckle fatigue life test device of the present invention; Figure 4 This is a schematic diagram of the installation structure of a test beam and parts above it in a multi-working condition simulation steering knuckle fatigue life test device of the present invention; Figure 5 This is a schematic structural diagram of a loading mechanism in a multi-working condition simulation steering knuckle fatigue life test device of the present invention; Figure 6 This is a schematic structural diagram of a linkage mechanism in a multi-working condition simulation steering knuckle fatigue life test device of the present invention; Reference numerals: 1. Test base; 2. Through slot; 3. Mounting seat; 4. Bevel gear disc; 5. Support base; 6. Bump; 7. First hydraulic rod; 8. Test beam; 9. Mounting column; 10. Mounting sleeve; 11. Connecting seat; 12. First connecting frame; 13. Steering knuckle body; 14. Extension frame; 15. First running wheel; 16. Damper; 17. Ball; 18. Loading arm; 19. Clamping frame; 20. Pressure sensor; 21. Loading plate; 22. Support arm; 23. Second running wheel; 24. Second hydraulic rod; 25. Drive shaft; 26. Drive disc; 27. Bevel gear; 28. Second connecting frame; 29. ​​First drive rod; 30. Sliding frame; 31. Second drive rod; 32. Test plate. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments to the present invention based on the above application content.

[0020] Example: like Figures 1 to 4As shown, the present invention provides a multi-working condition simulated steering knuckle fatigue life test device, including a test base 1, a mounting seat 3 is provided on the upper surface of the test base 1, a mounting post 9 is provided at one end of a test beam 8, and the mounting post 9 is rotatably installed on the mounting seat 3. The other end is provided with a running mechanism and a first connecting frame 12 hingedly connected to the mounting end of the steering knuckle body 13. The running mechanism includes an extension frame 14, which is provided at the end of the test beam 8 away from the mounting seat 3. The extension frame 14 is provided with a first running wheel 15 driven by a drive motor. A damper 16 is detachably provided on the steering knuckle body 13, and a ball 17 is provided at the end of the damper 16, and the ball 17 abuts against the test base 1.

[0021] When the device is in use, the damper 16 is installed on the steering knuckle body 13. The damper 16 can make the simulated driving conditions more realistic. The mounting end of the steering knuckle body 13 is connected to the first connecting frame 12. The first running wheel 15 can be rotated by controlling the drive motor to rotate, so that the test beam 8 rotates along the axis of the mounting post 9, and at the same time, the ball 17 can be driven to roll on the test base 1. The mounting post 9 can also be raised and lowered on the mounting seat 3, and the raising and lowering range is small to avoid interfering with the operation of subsequent structures. The damper 16 then carries the load, thus simulating the actual installation conditions of the steering knuckle body 13.

[0022] like Figure 3 、 4 As shown in Figures 6 and 7, in this embodiment, a linkage mechanism connected to the loading end of the steering knuckle body 13 is provided on the test beam 8, and the rotation of the test beam 8 is converted into driving the steering knuckle body 13 to swing back and forth along its mounting end through the linkage mechanism. The linkage mechanism includes a mounting sleeve 10 provided at the end of the test beam 8, and a drive shaft 25 is rotatably passed through the mounting sleeve 10. A first transmission assembly connected to the test beam 8 and the drive shaft 25 is provided on the mounting seat 3, and the rotation of the test beam 8 is converted into controlling the rotation of the drive shaft 25 through the first transmission assembly. The first transmission assembly includes a bevel gear 27 provided on the drive shaft 25, and a bevel gear disc 4 is provided on the mounting seat 3, which meshes with the bevel gear 27.

[0023] The drive shaft 25 is provided with a second transmission assembly connected to the loading end of the steering knuckle body 13. The second transmission assembly converts the rotation of the drive shaft 25 into a drive to drive the steering knuckle body 13 to swing back and forth along the first connecting frame 12. The second transmission assembly includes a second connecting frame 28 hinged to the loading end of the steering knuckle body 13. A sliding frame 30 is slidingly provided on the test beam 8 along its extension direction. One end of a first drive rod 29 is hinged to the second connecting frame 28 and the other end is hinged to the sliding frame 30. A drive disk 26 is provided on the drive shaft 25. One end of a second drive rod 31 is hinged to the sliding frame 30 and the other end is eccentrically hinged to the drive disk 26.

[0024] When the test beam 8 is swung by the first running wheel 15, the mounting post 9 and the mounting seat 3 rotate relative to each other. It should be noted that the mounting post 9 can be raised and lowered slightly on the mounting seat 3. The size must be controlled to ensure that the bevel gear 4 and the bevel gear 27 do not disengage during the small-scale lifting and lowering process of the mounting post 9, and that the transmission relationship is maintained. During the movement of the test beam 8, the bevel gear 4 and the bevel gear 27 move relative to each other, thereby driving the drive shaft 25 to rotate, thereby causing the drive disc 26 to rotate. During the rotation of the drive disc 26, the sliding frame 30 can be driven to slide on the test beam 8 by the eccentrically hinged second drive rod 31. During the sliding process, the sliding frame 30 can drive the second connecting frame 28 to move by the first drive rod 29, thereby controlling the steering knuckle body 13 to swing back and forth along the first connecting frame 12 to perform fatigue testing on the steering knuckle body 13.

[0025] like Figure 1 、 2 As shown, in this embodiment, the test base 1 is provided with a blocking mechanism that forms a protrusion on the rolling path of the ball 17. The blocking mechanism includes a support base 5 disposed at the bottom of the test base 1. The test base 1 is movably mounted on the support base 5. The support base 5 is provided with a first hydraulic rod 7, the telescopic end of which is connected to the test base 1. The support base 5 is provided with a protrusion 6. The test base 1 is circumferentially defined with multiple groups of through grooves 2, and the protrusions 6 are movably mounted within the through grooves 2.

[0026] In the initial state, the projection 6 is retracted into the through-slot 2. A steel plate can be placed inside the through-slot 2 to block it, simulating the steering knuckle 13 operating on a relatively smooth surface. Alternatively, the first hydraulic rod 7 can be retracted to drive the test base 1 downward, causing the projection 6 to protrude from the surface of the test base 1, thereby forming irregular projections. During the test, as the ball 17 passes over the projection 6, the motion force is transmitted to the steering knuckle 13 via the damper 16, simulating the steering knuckle 13 operating on a bumpy surface. The projection 6 is chamfered at its end, along with a removable test plate 32 with a textured surface. This chamfer protects the ball 17 from direct impact and damage. The test plate 32 can be replaced with a different textured test plate 32 to simulate various road conditions. This allows the steering knuckle 13 to withstand vertical impact, lateral, and longitudinal forces from the road surface, and simulates high-frequency vibrations and irregular alternating loads caused by uneven roads.

[0027] like Figure 3 、 4As shown in Figures 5 and 6, in this embodiment, the test base 1 is further provided with a loading mechanism connected to the test beam 8, through which pressure is applied to the test beam 8. The loading mechanism includes a support arm 22, one end of which is rotatably mounted on the mounting base 3, and the other end of which is provided with a second running wheel 23 that abuts the test base 1. A loading arm 18 is hingedly connected to the mounting sleeve 10, and a clamping frame 19 is provided at one end of the loading arm 18. The test beam 8 is provided with a connecting base 11, and the clamping frame 19 is clamped on the connecting base 11, and a loading plate 21 is provided at the other end. A second hydraulic rod 24 is provided on the support arm 22, and the telescopic end of the second hydraulic rod 24 abuts the loading plate 21.

[0028] The loading plate 21 can also be lifted by controlling the extension of the second hydraulic rod 24, thereby driving the loading arm 18 to rotate along the mounting sleeve 10. Downward pressure is applied to the test beam 8 via the clamping frame 19. Since the mounting end of the test beam 8 can move slightly, pressure can be applied to the steering knuckle body 13, simulating the stress on the steering knuckle body 13 under different vehicle loads. This allows the device to simulate different operating conditions during fatigue testing. A pressure sensor 20 can also be installed within the clamping frame 19. The pressure sensor 20 abuts the upper surface of the connecting seat 11. The pressure sensor 20 can detect the applied force, facilitating precise load control.

[0029] Specific usage and beneficial effects of the present invention: When the device performs a fatigue test on the steering knuckle, the mounting end of the steering knuckle body 13 can be connected to the first connecting frame 12, the loading end of the steering knuckle body 13 can be connected to the linkage mechanism, and the damper 16 can be installed on the steering knuckle body 13. The test beam 8 can be controlled to rotate along the mounting seat 3 through the walking mechanism to drive the ball 17 to roll on the surface of the test base 1. During the rotation of the test beam 8, the steering knuckle body 13 can be controlled to swing back and forth along the first connecting frame 12 through the linkage mechanism to perform a fatigue test on the steering knuckle. The test process can simulate the actual usage of the steering knuckle body 13, and a protrusion can be formed on the rolling path of the ball 17 through the blocking mechanism to simulate the usage state of the steering knuckle body 13 on a bumpy road, thereby further improving the authenticity of the test process and making the test results more reliable.

[0030] The basic principles, main features, and advantages of the present invention are shown and described above. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above. Modifications and improvements may be made based on the present invention, as will be apparent to those skilled in the art. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to fall within the scope of protection claimed in the present invention.

Claims

1. A multi-condition simulated steering knuckle fatigue life test device, characterized in that: Includes: A test base (1) having a mounting seat (3) provided on its upper surface; A test beam (8) is provided with a mounting column (9) at one end, the mounting column (9) is rotatably and liftably mounted on the mounting seat (3), and the other end is provided with a walking mechanism and a first connecting frame (12) hinged to the mounting end of the steering knuckle body (13); a linkage mechanism, arranged on the test beam (8) and connected to the loading end of the steering knuckle body (13), so as to convert the rotation of the test beam (8) into driving the steering knuckle body (13) to swing back and forth along its mounting end; A damper (16) is detachably arranged on the steering knuckle body (13), and a ball (17) is provided at the end thereof, wherein the ball (17) abuts against the test base (1); and A blocking mechanism is provided on the test base (1) to form a protrusion on the rolling path of the ball (17).

2. The multi-working condition simulation steering knuckle fatigue life testing device according to claim 1, characterized in that: The walking mechanism comprises an extension frame (14), the extension frame (14) being arranged at an end of the test beam (8) away from the mounting seat (3), and a first walking wheel (15) driven to rotate by a driving motor being arranged on the extension frame (14).

3. The multi-working condition simulation steering knuckle fatigue life testing device according to claim 1, characterized in that: The linkage mechanism includes: A mounting sleeve (10) is arranged at the end of the test beam (8), and a drive shaft (25) is rotatably inserted into the mounting sleeve (10); a first transmission assembly, disposed on the mounting seat (3) and connected to the test beam (8) and the drive shaft (25), to convert the rotation of the test beam (8) into driving the drive shaft (25) to rotate; and A second transmission assembly is provided on the drive shaft (25) and connected to the loading end of the steering knuckle body (13) to convert the rotation of the drive shaft (25) into driving the steering knuckle body (13) to swing back and forth along the first connecting frame (12).

4. The multi-working condition simulation steering knuckle fatigue life testing device according to claim 3, characterized in that: The first transmission assembly includes: A bevel gear (27) is provided on the drive shaft (25); and A bevel gear disc (4) is arranged on the mounting seat (3) and meshes with the bevel gear (27).

5. The multi-working condition simulation steering knuckle fatigue life testing device according to claim 3, characterized in that: The second transmission assembly includes: A second connecting frame (28) is hinged to the loading end of the steering knuckle body (13); A sliding frame (30) is slidably arranged on the test beam (8) along an extension direction of the test beam (8); a first driving rod (29), one end of which is hinged to the second connecting frame (28), and the other end of which is hinged to the sliding frame (30); a drive disc (26) disposed on the drive shaft (25); and A second driving rod (31) has one end hinged to the sliding frame (30) and the other end eccentrically hinged to the driving disc (26).

6. The multi-working condition simulation steering knuckle fatigue life testing device according to claim 1, characterized in that: The blocking mechanism includes: A support base (5) is arranged at the bottom of the test base (1), and the test base (1) is arranged on the support base (5) in a liftable manner; A first hydraulic rod (7) is provided on the support base (5), and a telescopic end thereof is connected to the test base (1); and The protrusion (6) is arranged on the support base (5), and a plurality of through slots (2) are circumferentially provided on the test base (1), and the protrusion (6) is arranged in the through slots (2) in a liftable manner.

7. The multi-working condition simulated steering knuckle fatigue life testing device according to claim 6, characterized in that: The end of the protrusion (6) is provided with a chamfer, and a detachable test plate (32) is provided, and the surface of the test plate (32) is provided with textures.

8. The multi-working condition simulated steering knuckle fatigue life testing device according to claim 3, characterized in that: The test base (1) is also provided with a loading mechanism connected to the test beam (8), and pressure loading is performed on the test beam (8) through the loading mechanism.

9. The multi-working condition simulation steering knuckle fatigue life testing device according to claim 8, characterized in that: The loading mechanism includes: A support arm (22), one end of which is rotatably sleeved on the mounting seat (3), and the other end of which is provided with a second running wheel (23) that abuts against the test base (1); A loading arm (18) is hinged on the mounting sleeve (10), one end of which is provided with a clamping frame (19), a connecting seat (11) is provided on the test beam (8), the clamping frame (19) is clamped on the connecting seat (11), and the other end of which is provided with a loading plate (21); and A second hydraulic rod (24) is provided on the support arm (22), and a telescopic end thereof abuts against the loading plate (21).

10. The multi-working condition simulated steering knuckle fatigue life testing device according to claim 9, characterized in that: A pressure sensor (20) is provided in the clamping frame (19), and the pressure sensor (20) abuts against the upper surface of the connecting seat (11).

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