Method and device for testing the rotational torque of a wheel bearing

Abstract

The application relates to the technical field of vehicle testing, in particular to a testing method and device for the rotating torque of a hub bearing, wherein the method comprises the following steps: collecting a first test result of at least one rotating speed of the hub bearing before durability test under different temperature conditions; then, simulating the actual vehicle state by using preset parameters to control a test vehicle, so as to conduct a durability test on the hub bearing, and collecting a second test result of at least one rotating speed of the hub bearing before durability test under different temperature conditions; and substituting the first test result and the second test result into a preset rotating torque formula to obtain a rotating torque test result of the hub bearing. According to the embodiment of the application, the rotating torque test result of the hub bearing can be obtained by calculating based on the test results before and after the durability test, the test result of the rotating torque of the hub bearing is combined with the test data of different temperatures, the test result is fitted to the actual driving scene, the accuracy and objectivity of the test result are improved, and the design standard of the rotating torque of the hub bearing is improved to reduce the rolling resistance, so that the application is more practical.

Description

Technical Field

[0001] This application relates to the field of vehicle testing technology, and in particular to a method and apparatus for testing the rotational torque of a wheel hub bearing. Background Technology

[0002] Wheel bearing rotation torque can affect a car's fuel consumption and range, and is one of the important performance indicators of a vehicle. Therefore, testing wheel bearing rotation torque is particularly crucial.

[0003] In related technologies, when testing the rotational torque of a wheel hub bearing, external factors such as bearing operating time, speed, and temperature are mainly controlled. Durability tests can be conducted after preheating the wheel hub bearing to obtain test data on the rotational torque of the wheel hub bearing.

[0004] However, in related technologies, the testing process for wheel hub bearing rotation torque testing does not match the actual vehicle usage scenario, resulting in deviations in torque measurement results. Furthermore, it fails to realize the numerical influence of rotation torque before and after durability testing and under different temperature conditions, making it difficult to fully reflect the true testing situation of wheel hub bearing rotation torque. This limits the design level of wheel hub bearing rotation torque, thereby affecting the potential for reducing vehicle rolling resistance, which urgently needs to be addressed. Summary of the Invention

[0005] This application provides a method and apparatus for testing the rotational torque of wheel hub bearings, in order to solve the problems in related technologies, such as the test process for testing the rotational torque of wheel hub bearings not matching the actual vehicle use scenario, resulting in deviations in torque measurement results, and failing to reflect the influence of durability before and after and different temperature differences on the numerical value of rotational torque, making it difficult to fully reflect the real test situation of wheel hub bearing rotational torque, thus limiting the design level of wheel hub bearing rotational torque and affecting the space for reducing vehicle rolling resistance.

[0006] The first aspect of this application provides a method for testing the rotational torque of a wheel hub bearing, comprising the following steps: collecting first test results of at least one rotational speed of the wheel hub bearing under different temperature conditions before durability testing;

[0007] The test vehicle is controlled using preset parameters to simulate real-vehicle conditions to conduct a durability test on the wheel hub bearing, and second test results of at least one rotational speed of the wheel hub bearing under different temperature conditions are collected; and

[0008] Substituting the first test result and the second test result into the preset rotational torque formula, the rotational force test result of the hub bearing is obtained.

[0009] Optionally, in one embodiment of this application, the step of collecting the test results of at least one rotational speed of the wheel hub bearing under different temperature conditions includes: testing the wheel hub bearing based on a preset normal temperature condition and collecting the average value of the friction torque corresponding to the at least one rotational speed; and testing the wheel hub bearing based on a preset low temperature condition and collecting the average value of the friction torque corresponding to the at least one rotational speed.

[0010] Optionally, in one embodiment of this application, the preset parameters include at least one of load, rotational speed, time, and operating conditions.

[0011] Optionally, in one embodiment of this application, the preset rotational torque formula is:

[0012] X = (aX1 + bX2) × c + (aX3 + bX4) × d

[0013] Where X represents the rotational force test result of the wheel hub bearing, X1 represents the average rotational torque of the wheel hub bearing under normal temperature test before durability, X2 represents the average rotational torque of the wheel hub bearing under low temperature test before durability, X3 represents the average rotational torque of the wheel hub bearing under normal temperature test after durability, X4 represents the average rotational torque of the wheel hub bearing under low temperature test after durability, and a, b, c, and d are all coefficients.

[0014] Optionally, in one embodiment of this application, before collecting the first test results of at least one rotational speed of the wheel hub bearing under different temperature conditions, the method further includes: preheating the wheel hub bearing until the continuous preheating time of the wheel hub bearing reaches a preset preheating time.

[0015] Optionally, in one embodiment of this application, after collecting the second test results of at least one rotational speed of the wheel hub bearing under different temperature conditions, the method further includes: determining whether the wheel hub bearing meets the preset warning conditions based on the second test results; if the preset warning conditions are met, then issuing an alarm.

[0016] Optionally, in one embodiment of this application, the preset alarm condition is that the hub bearing fails during the test.

[0017] A second aspect of this application provides a testing device for the rotational torque of a wheel hub bearing, comprising: a first acquisition module for acquiring first test results of at least one rotational speed of the wheel hub bearing under different temperature conditions before durability testing; a second acquisition module for controlling a test vehicle using preset parameters to simulate real vehicle conditions to conduct a durability test on the wheel hub bearing, and acquiring second test results of at least one rotational speed of the wheel hub bearing under the different temperature conditions; and a testing module for substituting the first test results and the second test results into a preset rotational torque formula to obtain the rotational force test results of the wheel hub bearing.

[0018] Optionally, in one embodiment of this application, the acquisition module is specifically used to: test the wheel hub bearing based on a preset normal temperature condition and acquire the average value of the friction torque corresponding to the at least one rotational speed; and test the wheel hub bearing based on a preset low temperature condition and acquire the average value of the friction torque corresponding to the at least one rotational speed.

[0019] Optionally, in one embodiment of this application, the preset parameters include at least one of load, rotational speed, time, and operating conditions.

[0020] Optionally, in one embodiment of this application, the preset rotational torque formula is:

[0021] X = (aX1 + bX2) × c + (aX3 + bX4) × d

[0022] Where X represents the rotational force test result of the wheel hub bearing, X1 represents the average rotational torque of the wheel hub bearing under normal temperature test before durability, X2 represents the average rotational torque of the wheel hub bearing under low temperature test before durability, X3 represents the average rotational torque of the wheel hub bearing under normal temperature test after durability, X4 represents the average rotational torque of the wheel hub bearing under low temperature test after durability, and a, b, c, and d are all coefficients.

[0023] Optionally, in one embodiment of this application, the device further includes: a preheating module, used to preheat the wheel hub bearing before collecting the first test results of at least one rotational speed of the wheel hub bearing under different temperature conditions, until the continuous preheating time of the wheel hub bearing reaches a preset preheating time.

[0024] Optionally, in one embodiment of this application, the second acquisition module includes: a judgment unit, used to determine whether the wheel hub bearing meets a preset warning condition based on the second test result after acquiring the second test result of at least one rotational speed of the wheel hub bearing under different temperature conditions; and an alarm unit, used to issue an alarm if the preset warning condition is met.

[0025] Optionally, in one embodiment of this application, the preset alarm condition is that the hub bearing fails during the test.

[0026] A third aspect of this application provides a vehicle, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the wheel hub bearing rotation torque testing method as described in the above embodiments.

[0027] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for testing the rotational torque of a wheel hub bearing.

[0028] This application's embodiments can calculate the wheel bearing rotational torque test results based on test results before and after durability testing. By combining test data at different temperatures, the wheel bearing rotational torque test results are made more closely aligned with real-world driving scenarios, improving the accuracy and objectivity of the test results. This, in turn, raises the design standards for wheel bearing rotational torque to reduce rolling resistance, making it more practical. Therefore, this solves the problems in related technologies where the testing process for wheel bearing rotational torque testing does not match actual vehicle usage scenarios, leading to deviations in torque measurement results. Furthermore, it fails to reflect the impact of durability testing and different temperature conditions on the rotational torque values, making it difficult to fully represent the true test situation of wheel bearing rotational torque. This limits the design level of wheel bearing rotational torque, thus affecting the potential for reducing vehicle rolling resistance.

[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0031] Figure 1 This is a flowchart of a method for testing the rotational torque of a wheel hub bearing according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the structure of a test device for the rotational torque of a wheel hub bearing according to an embodiment of this application;

[0033] Figure 3 This is a structural schematic diagram of a vehicle according to an embodiment of this application. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0035] The following describes a method and apparatus for testing the rotational torque of a wheel bearing according to embodiments of this application, with reference to the accompanying drawings. In the related technologies mentioned in the background section, the testing process for wheel bearing rotational torque testing does not match actual vehicle usage scenarios, leading to deviations in torque measurement results. Furthermore, it fails to reflect the numerical impact of rotational torque before and after durability testing, as well as different temperature conditions, on the torque values. This makes it difficult to comprehensively reflect the true testing situation of wheel bearing rotational torque, limiting the design level of wheel bearing rotational torque and thus affecting the potential for reducing vehicle rolling resistance. This application provides a method for testing the rotational torque of a wheel bearing. Based on test results before and after durability testing, the rotational torque test results of the wheel bearing can be obtained through calculation. By combining test data at different temperatures, the test results of the wheel bearing rotational torque are made to closely match actual vehicle driving scenarios, improving the accuracy and objectivity of the test results. This improves the design standards for wheel bearing rotational torque to reduce rolling resistance, making it more practical. This solves the problems in related technologies, such as the test process for wheel hub bearing rotation torque testing not matching the actual vehicle usage scenario, leading to deviations in torque measurement results, failure to reflect the numerical impact of rotation torque before and after durability testing and different temperature differences on rotation torque, difficulty in fully reflecting the true test situation of wheel hub bearing rotation torque, limitation of wheel hub bearing rotation torque design level, and thus affecting the space for reducing vehicle rolling resistance.

[0036] Specifically, Figure 1 This is a flowchart illustrating a method for testing the rotational torque of a wheel hub bearing, as provided in an embodiment of this application.

[0037] like Figure 1 As shown, the test method for the rotational torque of this wheel hub bearing includes the following steps:

[0038] In step S101, the first test results of at least one rotational speed under different temperature conditions are collected before the wheel hub bearing is durable.

[0039] It is understood that, in the embodiments of this application, different rotational speeds can be achieved by controlling the wheel hub bearings at different vehicle speeds, and then tests can be conducted under different temperature conditions by controlling the test environment temperature to obtain the first test result.

[0040] For example, under a specific test environment temperature, wheel hub bearing data is collected starting at 120 km / h, with tests conducted at corresponding engine speeds of 110 km / h, 100 km / h, 90 km / h, 80 km / h, 70 km / h, 60 km / h, 50 km / h, 40 km / h, 30 km / h, 20 km / h, and 10 km / h. Before switching from one speed point to the next, the wheel hub bearing is stabilized for 2 minutes. After the data is deemed stable, data is collected for 5 minutes at the corresponding engine speed. The average friction torque measured within 5 minutes is calculated, and this test is repeated 3 times. The average of the final results is taken as the first test result.

[0041] Optionally, in one embodiment of this application, before collecting the first test results of at least one rotational speed under different temperature conditions before the wheel hub bearing is durable, the method further includes: preheating the wheel hub bearing until the continuous preheating time of the wheel hub bearing reaches the preset preheating time.

[0042] In actual operation, the wheel hub bearing unit can be installed on a test bench with adjustable radial and axial loading forces. The inner ring of the bearing is pre-tightened with a specified torque. Half of the axle load is applied at a radial position X mm (bearing offset distance) from the bearing center, i.e., at the center of the tire's action point. The test is then run at the speed corresponding to a vehicle speed of 100 km / h for 3 minutes. This process serves as a warm-up for the wheel hub bearing test and is more closely aligned with actual driving conditions.

[0043] It should be noted that the preset preheating time can be set by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0044] In step S102, the test vehicle is controlled using preset parameters to simulate the actual vehicle condition in order to conduct a durability test on the wheel hub bearing, and the second test results of at least one rotational speed under different temperature conditions are collected before the wheel hub bearing is durable.

[0045] It is understood that, in the embodiments of this application, a durability test can be conducted on the wheel hub bearing, and the durable wheel hub bearing can be used as the test object. Different speeds of the wheel hub bearing can be achieved by controlling the wheel hub bearing at different vehicle speeds, and then the test environment temperature can be controlled to conduct tests under different temperature conditions to obtain the second test results.

[0046] It should be noted that the preset parameters can be set by those skilled in the art according to the actual situation, and no specific limitations are made here.

[0047] In actual operation, a durability test can be conducted on the wheel hub bearing. The wheel hub bearing is tightened with a specified lock nut and torque to simulate the actual vehicle condition. Alternative parts such as steering knuckles and brake discs are allowed to be used to connect the radial extension arm and the axial extension arm. The test is carried out cyclically with preset parameters to obtain the wheel hub bearing after durability testing.

[0048] Optionally, in one embodiment of this application, the preset parameters include at least one of load, rotational speed, time, and operating conditions.

[0049] For example, a wheel hub bearing durability test can be conducted based on the load, speed, time, and operating condition cycle shown in Table 1 to monitor whether the test wheel hub bearing fails. If no failure occurs, the test is terminated after 200 hours to obtain the wheel hub bearing after the durability test.

[0050] Table 1

[0051]

[0052]

[0053] In Table 1, the radial load and axial load satisfy...

[0054]

[0055] Ws=Wr·α

[0056] Where Wr is the radial load, which is perpendicular to the wheel hub bearing axis and acts on the wheel center line, with the direction pointing towards the wheel center being positive; Ws is the axial load, which is parallel to the wheel hub bearing axis and acts on the wheel center position, with the direction pointing towards the inside of the vehicle being positive; a is the turning acceleration; g is the gravitational acceleration; Hg is the height of the vehicle's center of gravity; and α is the load coefficient.

[0057] Optionally, in one embodiment of this application, after collecting the second test results of at least one rotational speed under different temperature conditions before the wheel hub bearing is durable, the method further includes: determining whether the wheel hub bearing meets the preset warning conditions based on the second test results; if the preset warning conditions are met, then issuing an alarm.

[0058] It is understood that, in the embodiments of this application, an alarm can be triggered when the wheel hub bearing meets the preset warning conditions to terminate the wheel hub bearing test after durability, thereby ensuring the safety and comprehensiveness of the test.

[0059] It should be noted that the preset warning conditions can be set by those skilled in the art according to the actual situation, and no specific limitations are made here.

[0060] Optionally, in one embodiment of this application, the preset alarm condition is that the hub bearing fails during the test.

[0061] It is understood that, in the embodiments of this application, the failure of the wheel hub bearing during the test can be determined based on the change in the average value of the collected wheel hub bearing rotational torque. If the bearing fails, an alarm signal is issued to terminate the test process.

[0062] Optionally, in one embodiment of this application, the test results of at least one rotational speed under different temperature conditions before the wheel hub bearing is durable are collected, including: testing the wheel hub bearing based on a preset normal temperature condition and collecting the average value of the friction torque corresponding to at least one rotational speed; testing the wheel hub bearing based on a preset low temperature condition and collecting the average value of the friction torque corresponding to at least one rotational speed.

[0063] It is understood that in the embodiments of this application, different rotational speeds can be achieved by controlling the wheel hub bearing at different vehicle speeds, thereby controlling the test environment temperature to obtain a first test result. The first test result includes test results based on a preset normal temperature condition and test results based on a preset low temperature condition. After the durability test, the wheel hub bearing is repeatedly controlled at different vehicle speeds to achieve different rotational speeds, thereby controlling the test environment temperature to obtain a second test result. The second test result includes test results based on a preset normal temperature condition and test results based on a preset low temperature condition.

[0064] It should be noted that the preset normal temperature operating condition and the preset low temperature operating condition can be set by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0065] For example, a preset room temperature test environment for wheel hub bearings can be set, ranging from 10 to 20 degrees Celsius, and a preset low temperature test environment for wheel hub bearings can be set, ranging from -20 to -30 degrees Celsius. Finally, the average value of the room temperature test rotation torque and the average value of the low temperature test rotation torque of the wheel hub bearings before the durability test are obtained, which is the first test result, and the average value of the room temperature test rotation torque and the average value of the low temperature test rotation torque of the wheel hub bearings after the durability test are obtained, which is the second test result.

[0066] In step S103, the first test result and the second test result are substituted into the preset rotational torque formula to obtain the rotational force test result of the hub bearing.

[0067] It is understood that, in the embodiments of this application, the average value of the rotational torque obtained under different test environment conditions in the above steps can be substituted into the preset rotational torque formula, and the test result of the rotational torque of the wheel hub bearing can be obtained by calculation, thereby improving the authenticity and objectivity of the rotational torque test of the wheel hub bearing and making the obtained test results more reliable and practical.

[0068] Optionally, in one embodiment of this application, the preset rotational torque formula is:

[0069] X = (aX1 + bX2) × c + (aX3 + bX4) × d

[0070] Where X represents the rotational force test result of the wheel hub bearing, X1 represents the average rotational torque of the wheel hub bearing under normal temperature test before durability, X2 represents the average rotational torque of the wheel hub bearing under low temperature test before durability, X3 represents the average rotational torque of the wheel hub bearing under normal temperature test after durability, X4 represents the average rotational torque of the wheel hub bearing under low temperature test after durability, and a, b, c, and d are all coefficients.

[0071] Specifically, the coefficients a and b in the above formula can be calculated and defined by the ratio of the number of months with average local temperature above and below zero, while the coefficients c and d can be obtained by the vehicle wheel hub bearing life requirements and the mileage threshold for guiding vehicle scrapping.

[0072] For example, if we statistically analyze the average monthly temperature in location A, the ratio of months with average temperatures above or below zero is approximately 87:13. Therefore, the coefficients a and b are 0.87 and 0.13, respectively. If vehicle wheel bearings require a service life of ≥500,000 kilometers, and the vehicle is guided to be scrapped after reaching 600,000 kilometers, then the coefficients c and d before and after durability are calculated to be 0.83 and 0.17, respectively. Therefore, the above formula can be...

[0073] X=(0.87X1+0.13)×0.83+(0.87X3+0.13X4)×0.17

[0074] Where X represents the rotational force test result of the wheel hub bearing, X1 represents the average rotational torque of the wheel hub bearing under normal temperature test before durability, X2 represents the average rotational torque of the wheel hub bearing under low temperature test before durability, X3 represents the average rotational torque of the wheel hub bearing under normal temperature test after durability, and X4 represents the average rotational torque of the wheel hub bearing under low temperature test after durability.

[0075] The wheel bearing rotation torque testing method proposed in this application can calculate the wheel bearing rotation torque test results based on the test results before and after the durability test. By combining test data at different temperatures, the wheel bearing rotation torque test results are made more consistent with actual vehicle driving scenarios, improving the accuracy and objectivity of the test results. This, in turn, raises the design standard for wheel bearing rotation torque to reduce rolling resistance, making it more practical. Therefore, this solves the problems in related technologies where the test process for wheel bearing rotation torque testing does not match actual vehicle usage scenarios, leading to deviations in torque measurement results. Furthermore, it fails to reflect the numerical impact of rotation torque before and after durability testing and under different temperature conditions, making it difficult to fully represent the true test situation of wheel bearing rotation torque. This limits the design level of wheel bearing rotation torque, thus affecting the potential for reducing vehicle rolling resistance.

[0076] Next, referring to the accompanying drawings, a test apparatus for the rotational torque of a hub bearing according to an embodiment of this application is described.

[0077] Figure 2 This is a schematic diagram of the structure of the test device for the rotational torque of a wheel hub bearing according to an embodiment of this application.

[0078] like Figure 2 As shown, the test device 10 for the rotational torque of the wheel hub bearing includes: a first acquisition module 100, a second acquisition module 200, and a test module 300.

[0079] The first acquisition module 100 is used to acquire the first test results of at least one rotational speed under different temperature conditions before the wheel hub bearing is durable.

[0080] The second acquisition module 200 is used to control the test vehicle using preset parameters to simulate the actual vehicle state in order to conduct a durability test on the wheel hub bearing and to acquire the second test results of at least one rotational speed under different temperature conditions before the wheel hub bearing is durable.

[0081] The test module 300 is used to substitute the first test result and the second test result into the preset rotational torque formula to obtain the rotational force test result of the hub bearing.

[0082] Optionally, in one embodiment of this application, the acquisition module is specifically used for: testing the wheel hub bearing based on a preset normal temperature condition and acquiring the average value of the friction torque corresponding to at least one rotational speed; and testing the wheel hub bearing based on a preset low temperature condition and acquiring the average value of the friction torque corresponding to at least one rotational speed.

[0083] Optionally, in one embodiment of this application, the preset parameters include at least one of load, rotational speed, time, and operating conditions.

[0084] Optionally, in one embodiment of this application, the preset rotational torque formula is:

[0085] X = (aX1 + bX2) × c + (aX3 + bX4) × d

[0086] Where X represents the rotational force test result of the wheel hub bearing, X1 represents the average rotational torque of the wheel hub bearing under normal temperature test before durability, X2 represents the average rotational torque of the wheel hub bearing under low temperature test before durability, X3 represents the average rotational torque of the wheel hub bearing under normal temperature test after durability, X4 represents the average rotational torque of the wheel hub bearing under low temperature test after durability, and a, b, c, and d are all coefficients.

[0087] Optionally, in one embodiment of this application, the device 10 further includes a preheating module.

[0088] The preheating module is used to preheat the wheel hub bearing before collecting the first test results of at least one speed under different temperature conditions before the wheel hub bearing durability is collected, until the continuous preheating time of the wheel hub bearing reaches the preset preheating time.

[0089] Optionally, in one embodiment of this application, the second acquisition module 200 includes a judgment unit and an alarm unit.

[0090] The judgment unit is used to determine whether the wheel hub bearing meets the preset warning conditions based on the second test results after collecting the second test results at at least one speed under different temperature conditions before the wheel hub bearing is durable.

[0091] An alarm unit is used to trigger an alarm if preset warning conditions are met.

[0092] Optionally, in one embodiment of this application, the preset alarm condition is that the hub bearing fails during the test.

[0093] It should be noted that the explanation of the aforementioned test method embodiment for the rotational torque of the wheel hub bearing also applies to the test device for the rotational torque of the wheel hub bearing in this embodiment, and will not be repeated here.

[0094] The wheel bearing rotation torque testing device proposed in this application can calculate the wheel bearing rotation torque test results based on the test results before and after durability testing. By combining test data at different temperatures, the test results of the wheel bearing rotation torque are made more consistent with actual vehicle driving scenarios, improving the accuracy and objectivity of the test results. This, in turn, improves the design standard of wheel bearing rotation torque to reduce rolling resistance, making it more practical. Therefore, this solves the problems in related technologies where the test process for wheel bearing rotation torque testing does not match actual vehicle usage scenarios, leading to deviations in torque measurement results. Furthermore, it fails to reflect the numerical impact of rotation torque before and after durability testing and under different temperature conditions, making it difficult to fully reflect the true test situation of wheel bearing rotation torque. This limits the design level of wheel bearing rotation torque, thus affecting the potential for reducing vehicle rolling resistance.

[0095] Figure 3 A schematic diagram of the structure of a vehicle provided in an embodiment of this application. The vehicle may include:

[0096] The memory 301, the processor 302, and the computer program stored on the memory 301 and capable of running on the processor 302.

[0097] When the processor 302 executes the program, it implements the test method for the rotational torque of the hub bearing provided in the above embodiments.

[0098] Furthermore, the vehicle also includes:

[0099] Communication interface 303 is used for communication between memory 301 and processor 302.

[0100] The memory 301 is used to store computer programs that can run on the processor 302.

[0101] The memory 301 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0102] If the memory 301, processor 302, and communication interface 303 are implemented independently, then the communication interface 303, memory 301, and processor 302 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0103] Optionally, in a specific implementation, if the memory 301, processor 302, and communication interface 303 are integrated on a single chip, then the memory 301, processor 302, and communication interface 303 can communicate with each other through an internal interface.

[0104] Processor 302 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0105] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for testing the rotational torque of a wheel hub bearing.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0107] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0108] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0109] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0110] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0111] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0112] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0113] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A method for testing the rotational torque of a wheel hub bearing, characterized in that, Includes the following steps: First test results of at least one rotational speed under different temperature conditions are collected before the wheel hub bearing is durable. The first test results include test results based on preset normal temperature conditions and test results based on preset low temperature conditions. The test vehicle is controlled using preset parameters to simulate real-vehicle conditions to conduct a durability test on the wheel hub bearing. Second test results are collected for the wheel hub bearing at at least one rotational speed under different temperature conditions. These second test results include test results based on preset normal temperature conditions and test results based on preset low temperature conditions. Substituting the first test result and the second test result into the preset rotational torque formula, the rotational torque test result of the hub bearing is obtained; The test results of collecting the wheel hub bearing at at least one rotational speed under different temperature conditions include: The wheel hub bearing is tested under preset normal temperature conditions, and the average value of the friction torque corresponding to at least one rotational speed is collected. The hub bearing is tested under a preset low temperature condition, and the average value of the friction torque corresponding to at least one rotational speed is collected. The preset rotational torque formula is: in, The results are from the torque test of the wheel hub bearing. This represents the average rotational torque of the wheel hub bearing under ambient temperature testing before durability testing. This represents the average rotational torque of the wheel hub bearing under pre-durability low-temperature testing. This represents the average rotational torque of the wheel hub bearing under room temperature testing after durability testing. This represents the average rotational torque of the hub bearing under low-temperature testing after durability testing, where a, b, c, and d are coefficients.

2. The method according to claim 1, characterized in that, The preset parameters include at least one of load, rotational speed, time, and operating conditions.

3. The method according to claim 1, characterized in that, Before collecting the first test results of at least one rotational speed under different temperature conditions before the durability of the wheel hub bearing is achieved, the following is also included: The wheel hub bearing is preheated until the preheating time reaches the preset preheating time.

4. The method according to claim 1, characterized in that, After collecting the second test results of the hub bearing at at least one speed under different temperature conditions, the method further includes: Based on the second test result, determine whether the hub bearing meets the preset warning conditions; If the preset warning conditions are met, an alarm will be triggered.

5. The method according to claim 4, characterized in that, The preset warning condition is that the wheel hub bearing fails during the test.

6. A testing device for the rotational torque of a wheel hub bearing, characterized in that, include: The first acquisition module is used to acquire the first test results of at least one rotational speed under different temperature conditions before the wheel hub bearing is durable. The first test results include test results based on preset normal temperature conditions and test results based on preset low temperature conditions. The second acquisition module is used to control the test vehicle using preset parameters to simulate real vehicle conditions, in order to conduct a durability test on the wheel hub bearing, and to acquire second test results of at least one rotational speed of the wheel hub bearing under different temperature conditions. The second test results include test results based on preset normal temperature conditions and test results based on preset low temperature conditions. The testing module is used to substitute the first test result and the second test result into a preset rotational torque formula to obtain the rotational torque test result of the wheel hub bearing; The test results of collecting the wheel hub bearing at at least one rotational speed under different temperature conditions include: The wheel hub bearing is tested under preset normal temperature conditions, and the average value of the friction torque corresponding to at least one rotational speed is collected. The hub bearing is tested under a preset low temperature condition, and the average value of the friction torque corresponding to at least one rotational speed is collected. The preset rotational torque formula is: in, The results are from the torque test of the wheel hub bearing. This represents the average rotational torque of the wheel hub bearing under ambient temperature testing before durability testing. This represents the average rotational torque of the wheel hub bearing under pre-durability low-temperature testing. This represents the average rotational torque of the wheel hub bearing under room temperature testing after durability testing. This represents the average rotational torque of the hub bearing under low-temperature testing after durability testing, where a, b, c, and d are coefficients.

7. A vehicle, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the method for testing the rotational torque of a wheel hub bearing as described in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the test method for the rotational torque of the wheel hub bearing as described in any one of claims 1-5.

Images