A double-station heavy truck wheel hub bearing simulation testing machine

Abstract

The present invention belongs to the technical field of wheel hub bearing testing, and in particular, relates to a dual-station heavy truck wheel hub bearing simulation test machine, comprising a base, a spindle drive system is arranged on the base, loading mechanisms are arranged at both ends of the spindle drive system, the loading mechanisms include a loading assembly and an upper force-applying assembly and a lower force-applying assembly for applying force to the loading assembly. The upper force-applying assembly includes a stretching arm hingedly connected to the loading arm, a connecting plate is arranged at the top of the stretching arm, a vertical pressure sensor is arranged at the top of the connecting plate, a loading universal connector is arranged on the vertical pressure sensor, a telescopic member is connected to the upper end of the loading universal connector, a bracket assembly is arranged at the top of the spindle drive system, and the telescopic member is slidably arranged on the top plate of the bracket assembly and can be moved and adjusted in multiple directions. The present invention can simulate various complex stress conditions that the wheel hub bearing may encounter in actual use through the synergistic effect of various structures, thereby ensuring the accuracy and reliability of the test results.

Description

Technical Field

[0001] The invention belongs to the technical field of wheel hub bearing testing, and in particular relates to a double-station heavy truck wheel hub bearing simulation testing machine. Background Art

[0002] Heavy truck wheel hub bearings are key components in the vehicle's driving system, and their performance directly affects the vehicle's safety, reliability and service life. In actual use, wheel hub bearings need to withstand complex loads and harsh working environments, including radial force, axial force, impact load, and air-cooled environment. Therefore, accurate testing of the performance and life of wheel hub bearings is an important part of ensuring their reliability. Traditional wheel hub bearing testing machines are usually unable to fully simulate the complex stress conditions under actual working conditions. For example, most existing testing machines only apply unidirectional radial and axial loads, but cannot simulate multi-directional composite loads at the same time. This limitation leads to a large deviation between the test results and actual usage, making it difficult to accurately evaluate the performance and life of wheel hub bearings.

[0003] In the prior art, the patent application document with application publication number CN110220707A discloses a heavy truck wheel hub bearing test device, including an axial loading mechanism, a radial loading mechanism and an offset loading mechanism. The specific connection and matching method between the offset loading mechanism and the test unit ensures that the forces from the axial loading mechanism and the radial loading mechanism can be well transmitted to the test unit, and the response speed is fast, making the test results more scientific and effective. Furthermore, the adjustment mechanism on the radial loading mechanism can also be used to adjust the stress point of the test unit, so as to fully simulate various stress conditions of the wheel hub bearing. However, the arm plate responsible for transmitting the load in the offset loading mechanism only moves in the vertical and horizontal directions, which limits its ability to simulate complex working conditions to a certain extent, affecting the applicability and accuracy of the test. Summary of the invention

[0004] In view of the above problems, the present invention proposes a double-station heavy-duty truck wheel hub bearing simulation testing machine, which effectively solves the technical problem that the wheel hub bearing test in the prior art cannot fully simulate the multi-directional complex stress conditions that the wheel hub bearing may encounter under actual working conditions.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a double-station heavy-duty truck wheel hub bearing simulation testing machine.

[0006] It comprises a base, on which a spindle drive system is arranged, and both ends of the spindle drive system are provided with loading mechanisms, and the loading mechanisms comprise a loading component and an upper force-applying component and a lower force-applying component for applying force to the loading component.

[0007] The loading assembly comprises a loading arm, a tooling hole is arranged on the loading arm, and a detachable tooling assembly is arranged in the tooling hole.

[0008] The upper force-applying component includes a stretching arm hingedly connected to the loading arm, a connecting plate is provided at the top of the stretching arm, a vertical pressure sensor is provided at the top of the connecting plate, a loading universal connector is provided on the vertical pressure sensor, a telescopic member is connected to the upper end of the loading universal connector, a bracket assembly is provided at the top of the spindle drive system, the telescopic member is slidably arranged on the top plate of the bracket assembly and can be moved and adjusted in multiple directions, and the telescopic member applies force to the loading sleeve in multiple directions in the cross direction or the circumferential direction through the multiple-directional movement and adjustment.

[0009] The lower force-applying assembly includes a telescopic power member, a driving end of the telescopic power member is provided with a connecting guide plate, one end of the connecting guide plate is connected to a lateral pressure sensor, the lateral pressure sensor is fixed to one end of a loading ear, the loading ear is hinged to a loading fork, and the loading fork is slidably connected to the lower part of the loading arm.

[0010] By adopting the above technical solution, the design of the loading mechanism is very flexible. The upper force-applying component can realize multi-directional force application on the loading sleeve through the combination of the tension arm, the connecting plate, the vertical pressure sensor, the loading universal connector and the telescopic component. This multi-directional mobile adjustment capability enables the test machine to simulate various complex stress conditions that the wheel hub bearing may encounter in actual use, thereby improving the accuracy and practicality of the test. Since the test machine can simulate various complex stress conditions of the wheel hub bearing in actual use, and has precise load control and flexible tooling component design, it is suitable for various types of wheel hub bearing testing needs.

[0011] Furthermore, the loading universal connector includes an upper fork ear and a lower fork ear, a support shaft is rotatably arranged between two side ears of the upper fork ear, a connecting body is formed on the support shaft, and two side ears of the lower fork ear are hinged to two sides of the connecting body.

[0012] Furthermore, the two side ears of the lower fork ear are hinged to the connecting body through a pin shaft, the pin shaft is a hollow structure and a locking bolt is provided inside through threaded cooperation, and one end of the locking bolt is tightened in the connecting body to lock the lower fork ear.

[0013] A vertical locking bolt is provided on the upper fork ear, and the bottom end of the vertical locking bolt is pressed against the connecting body to lock the upper fork ear.

[0014] With the above technical solution, the design of the loading universal connector allows the loading force to be flexibly adjusted in multiple directions. The upper fork ear and the lower fork ear are connected by a hinged connection between the support shaft and the connector, allowing angle adjustment within a certain range, thereby achieving multi-directional force application on the loading sleeve. This flexibility is crucial for simulating various complex stress conditions that the wheel hub bearing may encounter in actual use. In addition, the loading universal connector can be locked to meet the loading requirements in different situations and improve the flexibility of use.

[0015] Furthermore, a multi-directional track is formed on the top plate of the bracket assembly, the telescopic axis of the telescopic member vertically penetrates the multi-directional track, a moving block is provided at the bottom of the telescopic member, and a positioning threaded pin is provided on the moving block.

[0016] Furthermore, the multi-directional track includes a cross-shaped track and a circular track distributed on the outer circumference of the cross-shaped track, and the fan-shaped plate formed between the cross-shaped track and the circular track is connected by a connecting block.

[0017] The above technical solution is adopted, by setting a multi-directional track and cooperating with the loading universal connector, the telescopic part cooperates with the loading universal connector when moving in the cross track or circular track, so as to realize the multi-directional force application on the loading sleeve, and simulate various complex force conditions that the wheel hub bearing may encounter in actual use. Such as stretching, compression, torsion, etc. in different directions, thereby improving the accuracy and authenticity of the test. The coordinated use of the multi-directional track and the telescopic part enables the test personnel to quickly adjust the loading direction and strength without frequently changing or adjusting the test device. This not only saves time, but also improves the test efficiency, making the test process smoother and more efficient.

[0018] Furthermore, the spindle drive system includes two spindle boxes spaced apart from each other, a spindle is passed through the spindle box, both sides of the spindle box are provided with a box cover for rotatably supporting the spindle, and the two spindles are connected by a coupling.

[0019] A driven pulley is arranged on one of the main shafts, and the main shaft driving system further comprises a motor arranged on a base, and a driving pulley which is transmission-connected to the driven pulley is arranged on the rotating shaft of the motor.

[0020] Furthermore, a spindle connecting plate is provided at one end of the spindle box close to the loading arm, and the spindle is connected to the spindle connecting plate by interference fit. A large flange connecting plate connected by a flange is provided at one end of the spindle connecting plate away from the spindle, and a sleeve for connecting the tooling shaft is provided on the side of the large flange connecting plate away from the spindle connecting plate.

[0021] With the above technical solution, the tooling shaft and the sleeve are connected by interference fit. The spindle is connected to the spindle connection plate by interference fit. This connection method can greatly enhance the connection strength between the spindle and the spindle connection plate, ensuring that there will be no loosening or falling off when running at high speed or bearing a large load. The flange connection between the large flange connection plate and the spindle connection plate realizes the detachable connection of the tooling shaft, which is convenient for replacement and maintenance, and is easy to adapt to different types of test bearings, improving the flexibility of use.

[0022] Furthermore, the tooling assembly includes a test bearing and a loading sleeve sleeved outside the test bearing, the test bearing is arranged on the tooling shaft, and the inner wall of the loading sleeve abuts against the outer wall of the test bearing.

[0023] A loading end cover is provided at one end of the loading sleeve away from the loading arm, and a pressure plate is provided on the inner wall of the loading end cover. The pressure plate is pressed against the outer ring of the test bearing, and the test bearing is pressed against the tooling shaft through the step on the tooling shaft and the pressure cover at one end of the tooling shaft.

[0024] With the above technical solution, the inner wall of the loading sleeve abuts against the outer wall of the test bearing. This design not only provides stable support for the test bearing, but also ensures the uniformity and stability of load transfer. Through precise loading control, the force conditions in actual work can be simulated, thereby ensuring the accuracy and reliability of the test results; and the pressure plate design of the loading end cover and its inner wall can ensure that the loading force acts evenly and accurately on the outer ring of the test bearing, simulating the force conditions in actual work when cooperating with the loading mechanism. This design helps to evaluate the performance of the hub bearing in actual use and provides strong support for product design and improvement.

[0025] Furthermore, the inner wall of the loading arm is provided with a boss for connecting with the loading sleeve.

[0026] Furthermore, a bellows is provided on one side of the loading arm, a fan for blowing air toward the corresponding loading arm is provided in the bellows, a wind tube is provided at the end of the fan opposite to the loading arm, and a wind speed sensor is provided in the wind tube.

[0027] With the above technical solution, the fan blows air to the loading arm through the wind tube, which can simulate the wind conditions in the real environment. This is crucial for testing the performance and durability of the hub bearing under wind. By adjusting the power of the fan, different wind conditions and test scenarios can be simulated.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention can simulate various complex stress conditions that the wheel hub bearing may encounter in actual use, including vertical radial force, axial force and multi-directional composite force. This ensures the accuracy and reliability of the test results by loading the locking and unlocking of the universal joint, the movement of the telescopic part in the multi-directional track and the coordinated cooperation of the telescopic power part.

[0030] 2. The tooling assembly in the present invention is designed to be detachable, which is convenient for testing different types of hub bearings. By quickly adjusting the tooling assembly, it can adapt to different test requirements, such as hub bearings of different sizes and models, thereby greatly improving the flexibility of the test; in addition, the main shaft is connected to the main shaft connecting plate by an interference fit, which greatly enhances the connection strength between the main shaft and the main shaft connecting plate. At the same time, the flange connection between the large flange connecting plate and the main shaft connecting plate, as well as the interference fit connection between the tooling shaft and the sleeve, jointly improve the structural strength of the entire mechanical system. This makes the testing machine less likely to be damaged or deformed when subjected to a large load or impact, ensuring the smooth progress of the test.

[0031] 3. In the present invention, the inner wall of the loading sleeve abuts against the outer wall of the test bearing. This design not only provides stable support for the test bearing, but also ensures the uniformity and stability of load transfer. Through precise loading control, the stress conditions in actual work can be simulated, thereby ensuring the accuracy and reliability of the test results; and the pressure plate design of the loading end cover and its inner wall can ensure that the loading force acts evenly and accurately on the outer ring of the test bearing, simulating the stress conditions in actual work when cooperating with the loading mechanism. This design helps to evaluate the performance of the hub bearing in actual use and provides strong support for product design and improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a double-station heavy truck wheel hub bearing simulation testing machine of the present invention;

[0033] Figure 2 This is a structural schematic diagram of a double-station heavy truck hub bearing simulation testing machine of the present invention after the bracket assembly is removed;

[0034] Figure 3 for Figure 2 A partial enlarged view of the middle area A;

[0035] Figure 4 It is a schematic diagram of the structure of the loading component and the tooling component in the present invention;

[0036] Figure 5 It is a schematic diagram of the internal structure of the loading component and the tooling component in the present invention;

[0037] Figure 6 A top view of the bracket assembly of the present invention;

[0038] Figure 7 It is a structural schematic diagram of the bellows in the present invention.

[0039] In the figure: 1, base; 2, spindle drive system; 21, spindle box; 22, spindle; 221, driven pulley; 23, box cover; 24, coupling; 25, motor; 251, driving pulley; 26, spindle connecting plate; 27, large flange connecting plate; 271, sleeve; 3, loading mechanism; 31, loading assembly; 311, loading arm; 3111, boss; 312, tooling hole; 32, upper force application assembly; 320, vertical pressure sensor; 321, stretching arm; 322, connecting plate; 323, loading universal joint; 323a, upper fork ear; 323b, lower fork ear; 323c, support shaft; 323d, connector; 323e, pin; 323f, lock Tightening bolt; 323k, vertical locking bolt; 324, telescopic part; 3241, moving block; 3242, positioning threaded pin; 33, lower force application component; 331, telescopic power part; 332, connecting guide plate; 333, lateral pressure sensor; 334, loading single ear; 335, loading fork; 4, tooling assembly; 41, test bearing; 42, loading sleeve; 421, loading end cover; 422, pressure plate; 43, tooling shaft; 431, pressure cover; 5, bracket assembly; 51, multi-directional track; 511, cross track; 512, circular track; 513, fan plate; 514, connecting block; 6, bellows; 61, fan; 62, wind tube; 63, wind speed sensor. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] like Figure 1-Figure 7 A double-station heavy truck wheel hub bearing simulation testing machine is shown.

[0042] The invention comprises a base 1 on which a spindle driving system 2 is arranged. The spindle driving system 2 comprises two spindle boxes 21 spaced apart from each other. A spindle 22 is passed through the spindle box 21. Box covers 23 for rotatably supporting the spindle 22 are arranged on both sides of the spindle box 21. The two spindles 22 are connected by a coupling 24.

[0043] A driven pulley 221 is disposed on one of the main shafts 22 . The main shaft driving system 2 further includes a motor 25 disposed on the base 1 . A driving pulley 251 is disposed on the rotating shaft of the motor 25 and is transmission-connected to the driven pulley 221 .

[0044] After the motor 25 is started, the main shaft 22 is driven to rotate through the transmission of the driving pulley 251 and the driven pulley 221. Since the two main shafts 22 are connected by the coupling 24, the two main shafts 22 rotate synchronously.

[0045] Loading mechanisms 3 are provided at both ends of the spindle drive system 2, forming a double-station structure at both ends of the spindle drive system 2, which can test two wheel hub bearings at the same time, significantly improving the test efficiency. The double-station design not only saves test time, but also can compare the performance of two bearings under the same conditions, improving the reliability and consistency of the test.

[0046] The loading mechanism 3 includes a loading assembly 31 and an upper force applying assembly 32 and a lower force applying assembly 33 for applying force to the loading assembly 31 .

[0047] In this embodiment, the loading assembly 31 includes a loading arm 311, which is provided with a tooling hole 312. A detachable tooling assembly 4 is provided in the tooling hole 312. The tooling assembly 4 includes a test bearing 41 and a loading sleeve 42 sleeved on the outside of the test bearing 41. The test bearing 41 is provided on the tooling shaft 43, and the inner wall of the loading sleeve 42 abuts against the outer wall of the test bearing 41.

[0048] The inner wall of the loading arm 311 is provided with a boss 3111 for connecting with the loading sleeve 42. Specifically, the loading sleeve 42 is fixedly connected to the boss 3111 by bolts.

[0049] The tooling assembly 4 is detachable, which is convenient for testing different types of wheel hub bearings. The tooling assembly 4 can be quickly adjusted to meet different test requirements, thereby improving the test efficiency.

[0050] The inner wall of the loading sleeve 42 abuts against the outer wall of the test bearing 41, which provides stable support for the test bearing 41 on the one hand, and can ensure the uniformity and stability of load transfer on the other hand, and helps to ensure the accuracy and reliability of the test results through precise loading control.

[0051] In this embodiment, a spindle connecting plate 26 is provided at one end of the spindle box 21 close to the loading arm 311, and the spindle 22 is connected to the spindle connecting plate 26 by interference fit. A large flange connecting plate 27 connected by a flange is provided at one end of the spindle connecting plate 26 away from the spindle 22, and a sleeve 271 for connecting the tooling shaft 43 is provided on the side of the large flange connecting plate 27 away from the spindle connecting plate 26.

[0052] Specifically, the tooling shaft 43 is connected to the sleeve 271 by interference fit. The spindle 22 is connected to the spindle connection plate 26 by interference fit. This connection method can greatly enhance the connection strength between the spindle 22 and the spindle connection plate 26, ensuring that there will be no loosening or falling off when running at high speed or bearing a large load. The flange connection between the large flange connection plate 27 and the spindle connection plate 26 realizes the detachable connection of the tooling shaft 43, which is convenient for replacement and maintenance, and is easy to adapt to different types of test bearings 41, thereby improving the flexibility of use.

[0053] The above-mentioned coordinated connection can greatly improve the structural strength of the entire mechanical system, ensuring that it will not be damaged or deformed when subjected to large loads or impacts. In addition, since the connection is stable and reliable, it can ensure that there will be no errors or failures caused by connection problems during the test, thereby improving the test efficiency and accuracy.

[0054] In this embodiment, a loading end cover 421 is provided at one end of the loading sleeve 42 away from the loading arm 311, and a pressure plate 422 is provided on the inner wall of the loading end cover 421. The pressure plate 422 is pressed against the outer ring of the test bearing 41, and the test bearing 41 is pressed against the tooling shaft 43 through the step on the tooling shaft 43 and the pressure cover 431 at one end of the tooling shaft 43.

[0055] The loading sleeve 42 serves as the main part of the loading device, one end of which is connected to the loading arm 311, and the other end is provided with a loading end cover 421. This design allows the loading force to be transmitted to the loading sleeve 42 through the loading arm 311, and finally acts on the test bearing 41. The loading end cover 421 not only closes one end of the loading sleeve 42, but also applies pressure to the outer ring of the test bearing 41 through the pressure plate 422 provided on its inner wall. Among them, the pressure plate 422 is an important component inside the loading end cover 421, which is pressed on the outer ring of the test bearing 41. This design can ensure that the loading force acts evenly and accurately on the outer ring of the test bearing 41, thereby simulating the stress conditions in actual work.

[0056] The test bearing 41 is mounted on the tooling shaft 43 and is pressed by the step on the tooling shaft 43 and the pressure cap 431 at one end of the tooling shaft 43. This design not only ensures the stable installation of the test bearing 41 on the tooling shaft 43, but also prevents the test bearing 41 from moving or falling off during the loading process. Specifically, the pressure cap 431 at one end of the tooling shaft 43 is detachably connected by bolts.

[0057] The tooling shaft 43 is a supporting component of the test bearing 41, and its design takes into account the installation and fixation requirements of the test bearing 41. The step on the tooling shaft 43 provides a stable installation position for the test bearing 41, and the pressure cover 431 at one end of the tooling shaft 43 further ensures the compression and fixation of the test bearing 41.

[0058] In this embodiment, the upper force-applying assembly 32 includes a stretching arm 321 hingedly connected to the loading arm 311, a connecting plate 322 is provided at the top of the stretching arm 321, a vertical pressure sensor 320 is provided at the top of the connecting plate 322, a loading universal connector 323 is provided on the vertical pressure sensor 320, a telescopic member 324 is connected to the upper end of the loading universal connector 323, a bracket assembly 5 is provided at the top of the spindle drive system 2, the telescopic member 324 is slidably arranged on the top plate of the bracket assembly 5 and can be moved and adjusted in multiple directions, and the telescopic member 324 applies force to the loading sleeve 42 in multiple directions through multiple movement and adjustment. It should be noted that in this embodiment, the telescopic member 324 is specifically a cylinder.

[0059] The loading universal connector 323 is located above the vertical pressure sensor 320 and has multi-directional mobility. It can ensure that the telescopic member 324 can maintain a stable connection when pressure is applied and adapt to the movement of the telescopic member 324 in different directions. Through the multi-directional movement adjustment function, a more realistic force condition can be simulated to improve the accuracy and reliability of the test.

[0060] Specifically, the loading universal connector 323 includes an upper fork ear 323a and a lower fork ear 323b, a support shaft 323c is rotatably provided between the two side ears of the upper fork ear 323a, a connecting body 323d is formed on the support shaft 323c, and two side ears of the lower fork ear 323b are hinged to both sides of the connecting body 323d.

[0061] By using the loading universal joint 323 , the accuracy and reliability of the test or experimental equipment can be improved, while the error and damage risk caused by uneven force or mismatched direction can be reduced.

[0062] The two side ears of the lower fork ear 323b are hinged to the connecting body 323d through a pin shaft 323e. The pin shaft 323e is a hollow structure and a locking bolt 323f is provided inside through threaded cooperation. One end of the locking bolt 323f is pressed tightly in the connecting body 323d to lock the lower fork ear 323b. The upper fork ear 323a is provided with a vertical locking bolt 323k. The bottom end of the vertical locking bolt 323k is pressed tightly on the connecting body 323d to lock the upper fork ear 323a.

[0063] Specifically, one end of the pin 323e is fixedly connected to the side ear, and the other end extends into the connecting body 323d and can rotate relative to the connecting body 323d. When the lower fork ear 323b needs to be relatively locked and cannot swing, the locking bolt 323f is screwed into the hollow pin 323e and one end of the locking bolt 323f is pressed against the connecting body 323d.

[0064] When the upper fork ear 323a needs to be locked, the vertical locking bolt 323k is installed and the bottom end of the vertical locking bolt 323k is pressed against the connecting body 323d.

[0065] After the upper fork ear 323a and the lower fork ear 323b are locked, they are equivalent to a vertical straight axis connecting piece, which can cooperate with the upper force-applying component 32 and the lower force-applying component 33 in different situations according to needs, thereby improving the flexibility of use.

[0066] In this embodiment, a multi-directional track 51 is formed on the top plate of the bracket assembly 5, and the telescopic axis of the telescopic member 324 vertically penetrates the multi-directional track 51. A moving block 3241 is provided at the bottom of the telescopic member 324, and a positioning threaded pin 3242 is provided on the moving block 3241. The positioning threaded pin 3242 is pressed against the top plate of the bracket assembly 5 to achieve auxiliary positioning.

[0067] The multi-directional track 51 includes a cross track 511 and a circular track 512 distributed on the outer circumference of the cross track 511 . The fan-shaped plate 513 formed between the cross track 511 and the circular track 512 is connected to the top plate of the bracket assembly 5 through a connecting block 514 .

[0068] By setting a multi-directional track 51 and cooperating with the loading universal connector 323, the telescopic member 324 cooperates with the loading universal connector 323 when moving in the cross track 511 or the circular track 512, so as to realize multi-directional force application to the loading sleeve 42, and simulate various complex stress conditions that the wheel hub bearing may encounter in actual use. Such as stretching, compression, torsion, etc. in different directions, thereby improving the accuracy and authenticity of the test. The coordinated use of the multi-directional track 51 and the telescopic member 324 enables the test personnel to quickly adjust the loading direction and strength without frequently changing or adjusting the test device. This not only saves time, but also improves the test efficiency, making the test process smoother and more efficient.

[0069] In this embodiment, the lower force-applying assembly 33 includes a telescopic power member 331, a connecting guide plate 332 is provided at the driving end of the telescopic power member 331, one end of the connecting guide plate 332 is connected to a lateral pressure sensor 333, the lateral pressure sensor 333 is fixed to one end of a loading ear 334, the loading ear 334 is hinged to a loading fork 335, and the loading fork 335 is connected to the lower part of the loading arm 311 in a sliding cooperation. It should be noted that in this embodiment, the telescopic power member 331 is a cylinder.

[0070] A slideway is provided at the lower part of the loading arm 311, support plates are provided at both ends of the slideway, a lead screw is rotatably provided between the two support plates, a slider is provided on the lead screw, and one end of the loading fork 335 is fixedly connected to the slider by bolts.

[0071] The lateral loading is achieved by the telescopic effect of the telescopic power member 331 acting on the loading arm 311 .

[0072] In this embodiment, a bellows 6 is provided on one side of the loading arm 311, and a fan 61 is provided inside the bellows 6 for blowing air toward the corresponding loading arm 311. An air cylinder 62 is provided at the end of the fan 61 opposite to the loading arm 311, and a wind speed sensor 63 is provided inside the air cylinder 62.

[0073] The fan 61 blows air to the loading arm 311 through the wind tube 62, which can simulate the wind conditions in the real environment. This is very important for testing the performance and durability of the hub bearing under wind. By adjusting the power of the fan 61, different wind conditions and test scenarios can be simulated.

[0074] The double-station heavy truck hub bearing simulation test machine of this embodiment, when in use, after the tooling assembly 4 is installed, force is applied through the upper force-applying assembly 32. Specifically, the loading universal connector 323 can be locked first to achieve a single vertical radial force, that is, the telescopic member 324 is pushed downward, and the force is transmitted to the loading arm 311 through the stretching arm 321, and finally transmitted to the test bearing 41 through the loading sleeve 42. In addition, when the loading universal connector 323 is locked, after the radial load is released, the pressing plate 422 can be pressed against the side of the test bearing 41 by telescopic power member 331 and coordinated with the movement of telescopic member 324 to achieve a single axial load, or radial load can be coordinated with radial load at the same time, which is flexible in operation.

[0075] In addition, the loading universal connector 323 can be unlocked, and the telescopic member 324 can be moved in the multi-directional track 51, and the loading universal connector 323 can be coordinated to realize multi-directional force application on the loading sleeve 42, simulating various complex force conditions that the wheel hub bearing may encounter in actual use. The force conditions under different working conditions can be conveniently simulated, increasing the flexibility and scope of application of the test.

[0076] Finally, the fan 61 can be used to simulate different wind conditions and test scenarios.

[0077] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-station heavy truck wheel hub bearing simulation test machine, comprising a base (1), a spindle drive system (2) being arranged on the base (1), and loading mechanisms (3) being arranged at both ends of the spindle drive system (2), characterized in that: The loading mechanism (3) comprises a loading component (31), and an upper force-applying component (32) and a lower force-applying component (33) for applying force to the loading component (31); The loading assembly (31) comprises a loading arm (311), the loading arm (311) being provided with a tooling hole (312), and a detachable tooling assembly (4) being provided in the tooling hole (312); The upper force-applying assembly (32) comprises a stretching arm (321) hingedly connected to the loading arm (311); a connecting plate (322) is provided at the top end of the stretching arm (321); a vertical pressure sensor (320) is provided at the top end of the connecting plate (322); a loading universal connector (323) is provided on the vertical pressure sensor (320); a telescopic member (324) is connected to the upper end of the loading universal connector (323); a support assembly (5) is provided at the top end of the spindle drive system (2); the telescopic member (324) is slidably disposed on the top plate of the support assembly (5) and can be moved and adjusted in multiple directions; the telescopic member (324) applies force in multiple directions in the cross direction or the circumferential direction to the loading sleeve (42) through the multi-directional movement and adjustment; The lower force-applying assembly (33) comprises a telescopic power member (331), a driving end of the telescopic power member (331) is provided with a connecting guide plate (332), one end of the connecting guide plate (332) is connected to a lateral pressure sensor (333), the lateral pressure sensor (333) is fixed to one end of a loading ear (334), the loading ear (334) is hinged to a loading fork (335), and the loading fork (335) is connected to the lower part of the loading arm (311) in a sliding cooperation manner; The tooling assembly (4) comprises a test bearing (41) and a loading sleeve (42) sleeved outside the test bearing (41); the test bearing (41) is arranged on a tooling shaft (43); the inner wall of the loading sleeve (42) abuts against the outer wall of the test bearing (41); a loading end cover (421) is provided at one end of the loading sleeve (42) away from the loading arm (311); a pressure plate (422) is provided on the inner wall of the loading end cover (421); the pressure plate (422) is pressed against the outer ring of the test bearing (41); the test bearing (41) is pressed against the tooling shaft (43) via a step on the tooling shaft (43) and a pressure cover (431) at one end of the tooling shaft (43).

2. The double-station heavy truck wheel hub bearing simulation testing machine according to claim 1 is characterized in that: The loading universal connecting member (323) comprises an upper fork ear (323a) and a lower fork ear (323b), a support shaft (323c) is rotatably arranged between two side ears of the upper fork ear (323a), a connecting body (323d) is formed on the support shaft (323c), and two side ears of the lower fork ear (323b) are hinged to two sides of the connecting body (323d).

3. The double-station heavy truck wheel hub bearing simulation testing machine according to claim 2 is characterized in that: The two side ears of the lower fork ear (323b) are hinged to the connecting body (323d) via a pin shaft (323e); the pin shaft (323e) is a hollow structure and a locking bolt (323f) is provided inside the pin shaft through threaded engagement; one end of the locking bolt (323f) is pressed against the connecting body (323d) to lock the lower fork ear (323b); A vertical locking bolt (323k) is provided on the upper fork ear (323a), and the bottom end of the vertical locking bolt (323k) is pressed against the connecting body (323d) to lock the upper fork ear (323a).

4. The double-station heavy truck wheel hub bearing simulation testing machine according to claim 1 is characterized in that: A multi-directional track (51) is formed on the top plate of the bracket assembly (5); a telescopic axis of the telescopic member (324) vertically penetrates the multi-directional track (51); a moving block (3241) is provided at the bottom of the telescopic member (324); and a positioning threaded pin (3242) is provided on the moving block (3241).

5. The double-station heavy truck wheel hub bearing simulation testing machine according to claim 4 is characterized in that: The multi-directional track (51) comprises a cross-shaped track (511) and a circular track (512) distributed on the outer circumference of the cross-shaped track (511), and the fan-shaped plate (513) formed between the cross-shaped track (511) and the circular track (512) is connected via a connecting block (514).

6. The double-station heavy truck wheel hub bearing simulation testing machine according to claim 1 is characterized in that: The spindle drive system (2) comprises two spindle boxes (21) spaced apart from each other, a spindle (22) passing through the spindle box (21), a box cover (23) for rotatably supporting the spindle (22) being provided on both sides of the spindle box (21), and the two spindles (22) being connected via a coupling (24); A driven pulley (221) is provided on one of the main shafts (22), and the main shaft drive system (2) further comprises a motor (25) provided on the base (1), wherein a driving pulley (251) is provided on the rotating shaft of the motor (25) and is transmission-connected to the driven pulley (221).

7. The double-station heavy truck wheel hub bearing simulation testing machine according to claim 6 is characterized in that: A spindle connecting plate (26) is provided at one end of the spindle box (21) close to the loading arm (311); the spindle (22) is connected to the spindle connecting plate (26) by interference fit; an end of the spindle connecting plate (26) away from the spindle (22) is provided with a large flange connecting plate (27) connected by a flange; a side of the large flange connecting plate (27) away from the spindle connecting plate (26) is provided with a shaft sleeve (271) for connecting to a tooling shaft (43).

8. The double-station heavy truck wheel hub bearing simulation testing machine according to claim 1 is characterized in that: The inner wall of the loading arm (311) is provided with a boss (3111) for connecting to the loading sleeve (42).

9. The double-station heavy truck wheel hub bearing simulation testing machine according to claim 1 is characterized in that: A bellows (6) is provided on one side of the loading arm (311), a fan (61) for blowing air toward the corresponding loading arm (311) is provided in the bellows (6), a wind tube (62) is provided at one end of the fan (61) opposite to the loading arm (311), and a wind speed sensor (63) is provided in the wind tube (62).

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