A method, system, device and medium for verifying wear of a three-column slot housing of a drive shaft

Abstract

This application discloses a method, system, device, and medium for verifying the wear of a three-column groove housing of a drive shaft. The method includes: acquiring test parameters of the drive shaft; wherein the test parameters include torque loading value, loading time, and rotational speed loading value; after installing the drive shaft, testing the drive shaft according to the torque loading value, the loading time, and the rotational speed loading value to obtain the wear depth of the three-column groove housing connected to the sliding joint in the drive shaft; if the wear depth of the three-column groove housing meets a preset requirement, the verification is completed. This application reduces the complexity of sliding joint verification, improves the efficiency of sliding joint verification, and ensures the accuracy of sliding joint verification.

Description

Technical Field

[0001] This application relates to the field of automotive transmission system technology, and in particular to a method, system, test apparatus, and computer-readable storage medium for verifying the wear of a drive shaft three-column groove housing. Background Technology

[0002] The drive shaft is a crucial component of an automotive transmission system, primarily used to transmit power from the powertrain to the drive wheels. The slip joint (constant velocity joint) is a vital guiding and connecting component within the drive shaft, bearing significant variable loads during vehicle operation. The three-pin joint (three ball joints) of the drive shaft slip joint connects to the three-slot housing. During vehicle operation, due to changes in the position of the powertrain and / or wheels, the three-pin joint assembly within the slip joint reciprocates within the three-slot housing. The sliding and rolling friction of the three ball joints causes the three-slot housing to experience a frictional force generated by the ball rings, resulting in wear and causing abnormal noises from the drive shaft. In other words, the wear of the three-slot housing connecting the slip joint due to the frictional force of the three ball joints leads to abnormal noises and other quality problems in the drive shaft.

[0003] However, in the existing design scheme, the slip joint can only be verified in the comprehensive reliability road test of the whole vehicle. That is, the wear strength of the slip joint needs to be verified in the road test. It is not possible to effectively verify the wear strength of the slip joint in the design stage, which leads to high verification cost and long cycle of slip joint. At the same time, if the verification results do not meet the requirements of the whole vehicle, redesigning the slip joint will require more time and cost, affecting the development progress of the whole vehicle.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] The main objective of this application is to provide a method, system, testing device, and computer-readable storage medium for verifying the wear of a drive shaft's three-post groove housing. This aims to solve the problem in existing technologies where the wear strength of the sliding joint needs to be verified during road testing, making it impossible to effectively verify the wear strength of the sliding joint during the design phase, thus resulting in a cumbersome verification process. A first aspect of this application provides a method for verifying the wear of a drive shaft's three-post groove housing, comprising the following steps: obtaining the torque loading value, loading time, and rotational speed loading value of the drive shaft; after installing the drive shaft, testing it according to the torque loading value, loading time, and rotational speed loading value to obtain the wear depth of the three-post groove housing connected to the sliding joint in the drive shaft; and determining the verification result of the three-post groove housing based on the wear depth of the three-post groove housing.

[0006] Based on the aforementioned technical means, this application embodiment simulates the stress on the drive shaft three-post groove shell during actual vehicle operation by designing test parameters such as torque, loading speed, and loading time. It simulates the wear of the three-post groove shell in a real vehicle and tests its wear degree, thereby effectively verifying the drive shaft sliding joint. This allows for verification of whether the designed sliding joint meets operational requirements during the design phase, eliminating the need for cumbersome verification of the drive shaft sliding joint during comprehensive vehicle reliability road tests. This reduces the complexity of sliding joint verification, improves its efficiency, and ensures its accuracy.

[0007] Optionally, in one embodiment of this application, obtaining the torque loading value, loading time, and speed loading value of the drive shaft specifically includes: obtaining the target specifications of the drive shaft and obtaining the torque loading value of the drive shaft according to the target specifications; obtaining the input torque and transmission ratio of each gear of the transmission and calculating the loading time of the drive shaft according to the input torque, the transmission ratio, and the torque loading value; obtaining the speed range of the drive shaft and determining the speed loading value of the drive shaft according to the speed range.

[0008] Based on the above technical means, the embodiments of this application design test parameters including torque loading value, speed loading value and loading time. These test parameters are designed based on the equivalent analysis of the wear degree of the three-column groove shell, which can ensure the accuracy of the verification of the three-column groove shell of the sliding joint. The wear strength of the three-column groove shell can be verified quickly and accurately in the design stage, thereby effectively reducing the wear verification cost and verification cycle of the drive shaft sliding joint.

[0009] Optionally, in one embodiment of this application, the step of obtaining the input torque and transmission ratio of each gear of the transmission, and calculating the loading time of the drive shaft based on the input torque, the transmission ratio, and the torque loading value, specifically includes: obtaining the input torque and transmission ratio corresponding to each gear of the transmission; for each gear of the transmission, obtaining the first time of the transmission based on the input torque and the transmission ratio; calculating the output torque of the transmission based on the transmission ratio and the input torque; calculating the second time of the drive shaft based on the output torque, the torque loading value, and the first time; and summing all the second times for each gear of the transmission to obtain the loading time of the drive shaft.

[0010] Based on the above technical means, the loading time in the test parameters of this application embodiment is designed based on the equivalent analysis of the wear degree of the three-column groove shell, which can ensure the accuracy of the verification of the three-column groove shell of the sliding joint, and can adjust the rotational speed loading value and loading time, so as to achieve the purpose of quickly and accurately verifying the wear strength of the three-column groove shell in the design stage, thereby reducing the complexity of verification and effectively reducing the cost and cycle of drive shaft sliding joint wear verification.

[0011] Optionally, in one embodiment of this application, before the step of testing the drive shaft according to the torque loading value, the loading time, and the rotational speed loading value after the drive shaft is installed to obtain the wear depth of the three-column groove shell connected to the sliding joint in the drive shaft, the method further includes: obtaining the arrangement angle of the drive shaft and installing the drive shaft into the test device according to the arrangement angle.

[0012] Based on the aforementioned technical means, since a larger arrangement angle of the drive shaft results in greater wear of the three ball pins on the three-pillar groove housing in the sliding joint, the embodiments of this application set the arrangement angle to the maximum arrangement angle of a typical automobile. This allows the design requirements to be met even when the wear of the three-pillar groove housing is significant, thereby ensuring the effectiveness of the verified drive shaft sliding joint and improving the applicability of the drive shaft.

[0013] Optionally, in one embodiment of this application, the step of testing the drive shaft after installation according to the torque loading value, the loading time, and the rotational speed loading value to obtain the wear depth of the three-column groove shell connected to the sliding joint in the drive shaft specifically includes: applying the loading time to the sliding joint of the drive shaft according to the torque loading value and the rotational speed loading value to obtain the tested drive shaft; and using a probe to test the three-column groove shell in the tested drive shaft to obtain the wear depth of each wear surface of the three-column groove shell.

[0014] Based on the above technical means, this application embodiment detects the wear depth of each wear surface in the three-column groove shell after the test, thereby ensuring that the wear depth of each wear surface meets the requirements, and thus improving the reliability of the sliding joint verification.

[0015] Optionally, in one embodiment of this application, determining the verification result of the three-column groove shell based on the wear depth specifically includes: obtaining the fracture area threshold and the wear depth threshold of the three-column groove shell; if the wear depth is within the fracture area threshold and the wear depth threshold on each wear surface, then the three-column groove shell is determined to meet the design requirements.

[0016] Based on the above technical means, the embodiments of this application verify whether the sliding joint meets the requirements during the design stage. Compared with the prior art, no more cost is required for verification, thus reducing the design cycle of the sliding joint.

[0017] Optionally, in one embodiment of this application, after the drive shaft is installed, the drive shaft is tested according to the torque loading value, the loading time, and the rotational speed loading value to obtain the wear depth of the three-column groove shell connected to the sliding joint in the drive shaft, and then the method further includes: if the wear depth of the three-column groove shell does not meet the preset requirements, the three-column groove shell is verified as unqualified.

[0018] Based on the above technical means, the embodiments of this application verify whether the sliding joint meets the requirements during the design stage. If it does not meet the requirements, it is directly redesigned and verified again. Compared with the prior art, it does not require more cost for verification, thus reducing the design cycle of the sliding joint.

[0019] A second aspect of this application provides a wear verification system for a drive shaft three-column groove housing. The system includes: a parameter design module for acquiring the torque loading value, loading time, and rotational speed loading value of the drive shaft; a wear testing module for testing the drive shaft according to the torque loading value, loading time, and rotational speed loading value after installation, to obtain the wear depth of the three-column groove housing connected to the sliding joint in the drive shaft; and a wear verification qualification module for determining the verification result of the three-column groove housing based on the wear depth.

[0020] Optionally, in one embodiment of this application, the parameter design module includes: a torque design unit, a time design unit, and a speed design unit; wherein, the torque design unit is used to obtain the target specifications of the drive shaft and obtain the torque loading value of the drive shaft according to the target specifications; the time design unit is used to obtain the input torque and transmission ratio of each gear of the transmission and calculate the loading time of the drive shaft according to the input torque, the transmission ratio, and the torque loading value; the speed design unit is used to obtain the speed range of the drive shaft and determine the speed loading value of the drive shaft according to the speed range.

[0021] Optionally, in one embodiment of this application, the time design unit includes: a transmission gear position data acquisition subunit, a transmission bench running time determination subunit, a transmission output torque calculation subunit, a drive shaft running time determination subunit, and a drive shaft loading time calculation subunit; wherein, the transmission gear position data acquisition subunit is used to acquire the input torque and transmission ratio corresponding to each gear of the transmission; the transmission bench running time determination subunit is used to obtain the first time of the transmission for each gear of the transmission based on the input torque and the transmission ratio; the transmission output torque calculation subunit is used to calculate the output torque of the transmission based on the transmission ratio and the input torque; the drive shaft running time determination subunit is used to calculate the second time of the drive shaft based on the output torque, the torque loading value, and the first time; and the drive shaft loading time calculation subunit is used to sum the second times of all gears of the transmission as the loading time of the drive shaft.

[0022] Optionally, in one embodiment of this application, the drive shaft three-column groove shell wear verification system of this application embodiment further includes an arrangement angle design unit; an arrangement angle design and drive shaft installation unit, used to obtain the arrangement angle of the drive shaft and install the drive shaft into the test device according to the arrangement angle.

[0023] Optionally, in one embodiment of this application, the wear testing module includes: a test initiation unit and a sliding joint testing unit; wherein, the test initiation unit is used to apply the loading time to the sliding joint of the drive shaft according to the torque loading value and the rotational speed loading value to obtain the drive shaft after the test; the sliding joint testing unit is used to use a probe to test the three-column groove shell in the drive shaft after the test to obtain the wear depth of each wear surface of the three-column groove shell.

[0024] Optionally, in one embodiment of this application, the wear verification qualification module includes: a threshold setting unit and a wear degree confirmation unit; wherein, the threshold setting unit is used to obtain the fracture area threshold and the wear depth threshold of the three-column groove shell; the wear degree confirmation unit is used to determine that the three-column groove shell meets the design requirements if the wear depth is within the fracture area threshold and the wear depth threshold on each wear surface respectively.

[0025] Optionally, in one embodiment of this application, the drive shaft three-column groove shell wear verification system of this application embodiment further includes a redesigned test module; wherein, the redesigned test module is used to verify that the three-column groove shell is unqualified if the wear depth of the three-column groove shell does not meet the preset requirements.

[0026] A third aspect of this application provides a drive shaft three-column groove housing wear testing device, the drive shaft three-column groove housing wear testing device comprising: a memory, a processor, and a drive shaft three-column groove housing wear verification program stored in the memory and executable on the processor, wherein when the drive shaft three-column groove housing wear verification program is executed by the processor, it implements the steps of the drive shaft three-column groove housing wear verification method as described in the above embodiments.

[0027] A fourth aspect of this application provides a computer-readable storage medium storing a drive shaft three-post groove housing wear verification program, which, when executed by a processor, implements the steps of the drive shaft three-post groove housing wear verification method as described in the above embodiments.

[0028] The beneficial effects of this application are:

[0029] (1) The embodiments of this application design test parameters including torque loading value, speed loading value and loading time. These test parameters are designed based on the equivalent analysis of the wear degree of the three-column groove shell, which can ensure the accuracy of the verification of the three-column groove shell of the sliding joint. The wear strength of the three-column groove shell can be verified quickly and accurately in the design stage, thereby effectively reducing the wear verification cost and verification cycle of the drive shaft sliding joint.

[0030] (2) This application embodiment simulates the stress on the drive shaft three-post groove shell during actual vehicle operation by designing test parameters such as torque, loading speed and loading time, and simulates the wear of the three-post groove shell in actual vehicle operation and tests the wear degree of the three-post groove shell, thereby realizing the effective verification of the drive shaft sliding joint. In this way, it is possible to verify whether the designed sliding joint meets the operation requirements during the design stage, without having to perform tedious verification of the drive shaft sliding joint in the comprehensive reliability road test of the whole vehicle, reducing the complexity of sliding joint verification, improving the efficiency of sliding joint verification and ensuring the accuracy of sliding joint verification.

[0031] (3) The application embodiment verifies whether the sliding joint meets the requirements during the design stage. If it does not meet the requirements, it is directly redesigned and verified again. Compared with the prior art, it does not require more cost to verify, thus reducing the design cycle of the sliding joint.

[0032] (4) In this embodiment of the application, the wear depth of each wear surface in the three-column groove shell after the test is detected, thereby ensuring that the wear depth of each wear surface meets the requirements, and thus improving the reliability of the sliding joint verification.

[0033] 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

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a preferred embodiment of the drive shaft three-column groove shell wear testing device of this application;

[0036] Figure 2 This is a flowchart of a preferred embodiment of the wear verification method for the three-column groove housing of the drive shaft in this application;

[0037] Figure 3 This is a schematic diagram of the specific implementation steps of the entire execution process in a preferred embodiment of the wear verification method for the drive shaft three-column groove shell of this application;

[0038] Figure 4 This is a schematic diagram of a preferred embodiment of the drive shaft three-column groove housing wear verification system of this application;

[0039] Figure 5 This is a schematic diagram of a preferred embodiment of the drive shaft three-column groove shell wear testing device of this application.

[0040] Among them, 11-first fixed platform, 12-drive device, 13-sliding joint, 14-test piece, 15-fixed joint, 16-second fixed platform; 10-drive shaft three-column groove shell wear verification system; 100-parameter design module, 200-wear test module, 300-wear verification qualified module; 501-memory, 502-processor and 503-communication interface. Detailed Implementation

[0041] 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.

[0042] The following description, with reference to the accompanying drawings, outlines a method, system, apparatus, and medium for verifying the wear of the drive shaft three-post groove housing according to embodiments of this application. Addressing the issue mentioned in the background art where verifying the wear strength of the sliding joint requires road testing, making effective verification during the design phase impossible and resulting in cumbersome verification, this application provides a method for verifying the wear of the drive shaft three-post groove housing. This method simulates the stress on the drive shaft three-post groove housing during actual vehicle operation by designing test parameters such as torque, loading speed, and loading time. It simulates actual vehicle wear and tests the wear degree of the three-post groove housing, thereby effectively verifying the drive shaft sliding joint. This allows for verification of whether the designed sliding joint meets operational requirements during the design phase, eliminating the need for cumbersome verification during comprehensive vehicle reliability road testing. This reduces the complexity of sliding joint verification, improves efficiency, and ensures accuracy. This solves the technical problem in related technologies where the wear strength of the slip joint needs to be verified in road tests, but the wear strength of the slip joint cannot be effectively verified in the design stage, which makes the verification of the slip joint quite cumbersome.

[0043] First, the wear test device for the three-column groove shell of the drive shaft, which serves as the main execution body in this application embodiment, and the drive shaft installed in the test device are described as follows:

[0044] See Figure 1 The drive shaft three-column groove shell wear testing device includes a drive unit 12 that provides torque, a first fixed platform 11 for mounting the drive unit 12, and a second fixed platform 16 for mounting the test piece 14 (i.e., the drive shaft retaining section 15). The first fixed platform 11 is provided with a first slide rail, and the drive unit 12 can move back and forth (along...) Figure 1 The test specimen 14 (i.e., the drive shaft) can be moved in the left-right or front-back direction. The second fixed platform 16 is equipped with a second slide rail, and the installation position of the specimen 14 can be adjusted vertically to accommodate specimens of different angles and lengths for testing. Specifically, the angle of the specimen can be adjusted, sufficient torque can be provided for testing, and different lengths of specimens need to be tested. Specifically, the drive device 12 is used to fix the drive shaft sliding joint 13 and stably output the set test torque T according to the test input requirements. The second fixed platform 16 is used to simulate the actual vehicle assembly state and connects with the test specimen drive shaft fixed joint. The drive device is installed on the first slide rail, and the drive shaft fixed joint is installed on the second slide rail, allowing it to slide and adjust to accommodate the specimen length and different arrangement angles.

[0045] The test device can accommodate a drive shaft specimen 14, which includes a shaft, a fixed joint, a sliding joint, and a bracket. A fixed joint is located near one end of the shaft, and a sliding joint is located near the other end. The shaft is connected to the bracket via a bearing, and the bracket is located on the side of the sliding joint away from the fixed joint. Dust covers are provided between the shaft and the fixed joint, and between the shaft and the sliding joint. The two dust covers are located between the fixed joint and the sliding joint. The fixed joint is used to connect the brake, and the sliding joint is used to connect the transmission. Specifically, the sliding joint includes three ball pins and a three-post grooved housing. The three-ball pin constant velocity universal joint includes a three-post grooved housing, a three-way joint, ball rings, needle rollers, needle roller retaining rings, and retaining rings. There is a certain gap between the ball track of the three-post grooved housing and the ball ring of the three-ball pin internal assembly to support the sliding of the three-ball pin.

[0046] Meanwhile, to facilitate understanding of this application, the embodiments of this application will be briefly described below:

[0047] This application embodiment calculates and designs test parameters such as torque, arrangement angle, and loading speed for drive bearings corresponding to different vehicle models, simulating the stress conditions of the drive shaft three-post groove shell during actual vehicle operation. It then simulates the wear of the drive shaft three-post groove shell in a real vehicle setting. By measuring the wear depth of the three-post groove shell during the test, it determines whether the drive shaft three-post groove design meets the requirements of the entire vehicle. This effectively solves the problem of high cost and long cycle caused by the need for wear verification of the drive shaft sliding joint during full-vehicle road testing. This application embodiment can evaluate whether the drive shaft model design meets the requirements of the entire vehicle by measuring the wear depth of the three-post groove shell after the test, thereby shortening the drive shaft design verification cycle and reducing design and development costs.

[0048] Specifically, Figure 2 This is a flowchart illustrating a method for verifying the wear of a three-column groove housing of a drive shaft, as provided in an embodiment of this application.

[0049] like Figure 2 As shown, the wear verification method for the three-column groove housing of the drive shaft includes the following steps:

[0050] In step S101, the test parameters of the drive shaft are obtained; wherein, the test parameters include torque loading value, loading time and speed loading value.

[0051] In one possible implementation, the test parameters are calculated using the model of the actual vehicle drive shaft, namely, the torque loading value T, the speed loading value n, and the loading time t for bench verification. Considering the application of the segment type, the target specifications of the drive shaft are obtained, and the static torsional strength value of the drive shaft is obtained based on the target specifications. The torque loading value T of the drive shaft is then calculated based on the static torsional strength value. The input torque and transmission ratio of each gear of the transmission are obtained, and the loading time t of the drive shaft is calculated based on the input torque, the transmission ratio, and the torque loading value. Based on the road spectrum information collected from past vehicle models, the common vehicle speed during operation is 30 km / h-120 km / h. The rotational speed range of the drive shaft is obtained, which is converted to a drive shaft speed of approximately 250 r / min-1000 r / min. The rotational speed loading value n of the drive shaft is determined based on the rotational speed range. Under the same test cycle number, the faster the rotational speed, the shorter the required test time. However, if the rotational speed is too high, it will cause the equipment to overheat. Based on the above conditions, in one embodiment, the rotational speed loading value n is set to 300 r / min.

[0052] It is understandable that the static torsional strength of a drive shaft represents the maximum torque that the drive shaft can withstand in the torsional direction. When this torque value is reached, the drive shaft may break. Determining its actual value requires consideration of factors such as the drive shaft's design specifications and materials. When calculating the static torsional strength of a drive shaft, the joint type is initially selected based on the torque transmitted from the powertrain to the drive shaft. Then, the moving joint and fixed joint are installed according to the positions of the powertrain and wheel hub bearings. Finally, the static torsional strength value is calculated. In this embodiment, the torque loading value is the static torsional strength value / 2.5. The test loading torque value is based on the static torsional strength / 2.5 of the corresponding drive shaft specification. Taking a 2600 size as an example, the static torsional strength requirement is ≥3700 Nm. Therefore, the wear test loading torque value is: 3700 / 2.5 = 1480 Nm.

[0053] It is worth noting that the embodiments of this application design test parameters including torque loading value, speed loading value and loading time. These test parameters are designed based on the equivalent analysis of the wear degree of the three-column groove shell, which can ensure the accuracy of the verification of the three-column groove shell of the sliding joint. It can quickly and accurately verify the wear strength of the three-column groove shell in the design stage, thereby effectively reducing the wear verification cost and verification cycle of the drive shaft sliding joint.

[0054] In one possible implementation, during the calculation of the loading time t of the drive shaft, the input torque and transmission ratio corresponding to each gear of the transmission are first obtained; for each gear of the transmission, a first time of the transmission is obtained based on the input torque and the transmission ratio. This first time is based on a preset wear degree caused by the three ball pins of the sliding joint to the three column housings, and when the wear degree caused to the three column housings is basically the same in each gear of the transmission, the time required to run at the corresponding input shaft speed (4000 r / min) and input torque is the first time; the output torque of the transmission is calculated based on the transmission ratio and the input torque; a second time of the drive shaft is calculated based on the output torque, the torque loading value, and the first time; the sum of all the second times for each gear of the transmission is taken as the loading time of the drive shaft.

[0055] It should be noted that the embodiments of this application perform equivalent analysis based on the actual vehicle road spectrum of the drive shaft to obtain the input torque and running time of each gear of the transmission; and convert it according to the test torque ratio to obtain the running time required for the test at each gear. That is to say, the wear of the three-post groove shell caused by each gear at a transmission input shaft speed of 4000 r / min under the corresponding running time is consistent with the test wear of the three-post groove shell caused by the speed loading value in the test device under the total loading time. Based on this, the loading time t is obtained.

[0056] Table 1: Data on transmission input speed, input torque, gear ratio, and transmission bench running time at each gear.

[0057]

[0058] Table 2: Data on drive shaft static torsional strength, transmission output torque, torque load value, proportional conversion, and test loading time at each gear.

[0059]

[0060] Therefore, the total test loading time for each gear is rounded down to determine the test loading time of this embodiment as 80h.

[0061] It is worth noting that the loading time in the test parameters of this application embodiment is based on the equivalent analysis of the wear degree of the three-column groove shell, which can ensure the accuracy of the verification of the three-column groove shell of the sliding joint, and can adjust the rotational speed loading value and loading time, so as to achieve the purpose of quickly and accurately verifying the wear strength of the three-column groove shell in the design stage, thereby reducing the complexity of verification and effectively reducing the cost and cycle of drive shaft sliding joint wear verification.

[0062] Taking the first gear of the transmission as an example, based on the actual vehicle road spectrum (that is, the collected data on the wear state of the drive shaft sliding joint and the data on each gear of the transmission), the transmission bench running time (i.e., the first time) corresponding to the input shaft speed and input torque of this gear under the preset wear degree of the three-pillar housing is determined. First, the transmission input shaft speed of 4000 r / min, the gear ratio of 15.564 and the input torque of 168 Nm are obtained. The output torque is the product of the input torque and the gear ratio / 2 (two shafts), that is, 168 x 15.564 / 2 = 1307 (output torque value). Calculate the ratio of output torque to torque loading value, i.e., 1307 / 1480 = 0.883 (ratio). This ratio is equal to the ratio of transmission bench running time to test running time. Calculate the test running time (i.e., the second time), which is the first time multiplied by the corresponding ratio, i.e., 2.18 x 0.883 = 1.926 (second time). Similarly, calculate the second time for all gears and add them together to get the total loading time.

[0063] Understandably, the equivalent analysis means that the work done by the transmission on the sliding joint's three-post housing is equal to the work done by the test device's drive unit (i.e., the motor) on the sliding joint's three-post housing. W = Pt, 9550P = Tn, where W is the work, P is the motor power, t is the time, and T is the torque.

[0064] Before step S103, the drive shaft arrangement angle x4 for bench verification is determined. That is, based on the general design arrangement angle of a car, which is usually ≤6°, the arrangement angle of the test drive shaft is determined to be 6°, and the drive shaft is installed into the test device according to the arrangement angle.

[0065] In one possible implementation, the drive shaft specimen is mounted on a test bench. The drive shaft sliding joint is connected to the drive unit, and the drive shaft fixed joint is connected to a second fixed platform. The drive shaft fixed joint is fastened to a fixing member with a nut, and the fastening torque is consistent with the actual vehicle installation torque. The fixing member can slide on the second slide rail of the second fixed platform. Based on experience, the drive shaft arrangement angle is 6°, and the center of the sliding joint should be within ±5mm of the theoretical design position. However, this is not limited to this; the arrangement angle can also be set to 3°, 5°, etc. Specifically, the sliding joint of the drive shaft specimen is connected to the drive unit via a spline, and the fixed joint of the drive shaft specimen and the fixing member on the second slide rail are connected via a spline. The spline parameters are consistent with the actual vehicle. Simultaneously, the fixed joint and the fixing member are locked with a nut, and the locking torque is consistent with the actual vehicle. The positions of the drive unit on the first slide rail and the fixing member on the second slide rail are adjusted, and the initial test distance and angle are set.

[0066] It is worth noting that the larger the arrangement angle of the drive shaft, the greater the wear of the three ball pins on the three pillar groove shell in the sliding joint. In this embodiment, the arrangement angle is set to the maximum arrangement angle of 6° in general automobiles. Thus, even when the wear of the three pillar groove shell is large, the design requirements can still be met, thereby ensuring the effectiveness of the verified drive shaft sliding joint and improving the applicability of the drive shaft.

[0067] In step S102, after the drive shaft is installed, the drive shaft is tested according to the torque loading value, the loading time, and the rotational speed loading value to obtain the wear depth of the three-column groove shell connected to the sliding joint in the drive shaft.

[0068] In one possible implementation, after the drive shaft is installed in the testing device, during the testing of the wear depth of the three-pin joint housing, the test is initiated. The drive shaft's sliding joint is loaded with the specified torque and speed values ​​for the specified loading time. This means starting the drive unit (i.e., the motor), applying the specified torque and speed values, and maintaining the loading for the specified time. After the drive shaft is loaded, it is removed from the testing device, resulting in a tested drive shaft. This involves disassembling the drive shaft specimen, disassembling the sliding joint, removing the dust cover of the sliding joint using specialized tools, and removing the three-pin joint assembly. A probe is then used to test the wear depth of each wear surface of the three-pin joint housing in the tested drive shaft. It should be noted that air cooling is required during the drive shaft test loading to ensure the specimen (drive shaft) temperature is ≤80℃.

[0069] It is worth noting that, in this embodiment of the application, the wear depth of each wear surface in the three-column groove shell after the test is detected, thereby ensuring that the wear depth of each wear surface meets the requirements, and thus improving the reliability of the sliding joint verification.

[0070] In step S103, the verification result of the three-column groove shell is determined based on the wear depth of the three-column groove shell.

[0071] In one possible implementation, during the verification process where the wear depth meets the preset requirements, the fracture area threshold (less than 10) and wear mark depth threshold (less than 0.045) of the three-column groove shell are obtained; if the wear depth is within the fracture area threshold and the wear mark depth threshold on each wear surface, then the three-column groove shell is determined to meet the design requirements.

[0072] Table 3: Evaluation Criteria for Fracture Area and Wear Track Depth of Three-Column Groove Shells

[0073]

[0074] The wear depth of each wear surface inside the three-column groove shell is detected by probe. If the test results meet or exceed the Class B standard in Section 10.2.7 of "JBT 10189-2016 Rolling Bearings for Automobile Constant Velocity Universal Joints and their Assemblies", the design can meet the service life requirements of the whole vehicle. Otherwise, it needs to be redesigned.

[0075] It is understood that the sliding joint in the drive shaft of this application embodiment needs to meet preset requirements to ensure that the drive shaft will not make abnormal noise during actual vehicle operation. If the wear depth of the three-post groove shell does not meet the preset requirements, the redesigned three-post groove shell will be tested until the three-post groove shell meets the preset requirements and the wear verification is completed.

[0076] It is worth noting that the embodiments of this application verify whether the sliding joint meets the requirements during the design stage. If it does not meet the requirements, it is directly redesigned and verified again. Compared with the prior art, it does not require more cost for verification, thus reducing the design cycle of the sliding joint.

[0077] The following describes the entire implementation process in accordance with the steps of the wear verification method for the drive shaft three-column groove housing of this application, such as... Figure 3 As shown:

[0078] Step S1, set test parameters: calculate the test loading torque value T, test speed n, and test time t based on the universal joint type of the drive shaft selected for the vehicle;

[0079] Step S2, Start the test. Start the drive motor to apply torque, and the test begins. Note: Air cooling is required during the test to ensure the specimen temperature is ≤80℃;

[0080] Step S3: After the test is completed, remove the drive shaft, disassemble the drive shaft test piece, disassemble the sliding joint of the test piece, use special tools to remove the dust cover of the sliding joint, and take out the three-pin joint assembly.

[0081] Step S4, Testing: Use probes to detect the wear depth of each wear surface inside the three-column groove shell;

[0082] If the test results meet or exceed the Class B standard in Clause 10.2.7 of "JBT 10189-2016 Rolling Bearings for Automobile Constant Velocity Universal Joints and their Assemblies", then the design can meet the service life requirements of the whole vehicle.

[0083] If the test results do not meet the standard design in step S5, then it is necessary to redesign and continue to execute steps S1-S5 until the requirements are met.

[0084] In summary, the embodiments of this application can simulate the stress on the drive shaft three-post groove shell during actual vehicle operation by designing test parameters such as torque, loading speed, and loading time. This allows for the simulation of wear on the three-post groove shell and the testing of its wear degree, thereby achieving effective verification of the drive shaft sliding joint. Consequently, it is possible to verify whether the designed sliding joint meets the operational requirements during the design phase, eliminating the need for cumbersome verification of the drive shaft sliding joint during the comprehensive reliability road test of the entire vehicle. This reduces the complexity of sliding joint verification, improves the efficiency of sliding joint verification, and ensures the accuracy of sliding joint verification.

[0085] Next, with reference to the accompanying drawings, a drive shaft three-column groove housing wear verification system proposed according to an embodiment of this application is described.

[0086] Figure 4 This is a block diagram of the wear verification system for the drive shaft three-column groove housing according to an embodiment of this application.

[0087] like Figure 4 As shown, the drive shaft three-column groove shell wear verification system 10 includes: parameter design module 100, wear test module 200 and wear verification qualification module 300.

[0088] Specifically, the parameter design module 100 is used to obtain the torque loading value, loading time, and speed loading value of the drive shaft;

[0089] Wear test module 200 is used to test the drive shaft according to the torque loading value, the loading time and the rotational speed loading value after the drive shaft is installed, and to obtain the wear depth of the three-column groove shell connected to the sliding joint in the drive shaft;

[0090] The wear verification qualification module 300 is used to determine the verification result of the three-column groove shell based on the wear depth of the three-column groove shell.

[0091] Optionally, in one embodiment of this application, the parameter design module 100 includes: a torque design unit, a time design unit, and a speed design unit.

[0092] The torque design unit is used to obtain the target specifications of the drive shaft and to obtain the torque loading value of the drive shaft based on the target specifications.

[0093] The timing design unit is used to obtain the input torque and transmission ratio of each gear of the transmission, and calculate the loading time of the drive shaft based on the input torque, the transmission ratio and the torque loading value.

[0094] The speed design unit is used to obtain the speed range of the drive shaft and determine the speed load value of the drive shaft based on the speed range.

[0095] Optionally, in one embodiment of this application, the time design unit includes: a transmission gear data acquisition subunit, a transmission bench running time determination subunit, a transmission output torque calculation subunit, a drive shaft running time determination subunit, and a drive shaft loading time calculation subunit.

[0096] The transmission gear data acquisition subunit is used to acquire the input torque and transmission ratio corresponding to each gear of the transmission.

[0097] The transmission test bench running time determination subunit is used to determine the first time of the transmission for each gear, based on the input torque and the transmission ratio.

[0098] The transmission output torque calculation subunit is used to calculate the output torque of the transmission based on the transmission ratio and the input torque.

[0099] The drive shaft running time determination subunit is used to calculate the second time of the drive shaft based on the output torque, the torque loading value, and the first time.

[0100] The drive shaft loading time calculation subunit is used to take the sum of the second times for each gear of the transmission as the loading time of the drive shaft.

[0101] Optionally, in one embodiment of this application, the drive shaft three-column groove housing wear verification system 10 of this application embodiment further includes an angle arrangement design unit;

[0102] An angle design and drive shaft mounting unit is used to obtain the angle of the drive shaft and install the drive shaft into the test device according to the angle of the drive shaft.

[0103] Optionally, in one embodiment of this application, the wear test module 200 includes: a test initiation unit and a sliding joint test unit.

[0104] The test start unit is used to apply the loading time to the sliding joint of the drive shaft according to the torque loading value and the speed loading value, so as to obtain the drive shaft after the test.

[0105] The sliding joint testing unit is used to test the three-column groove shell in the drive shaft after the test using a probe, and to obtain the wear depth of each wear surface of the three-column groove shell.

[0106] Optionally, in one embodiment of this application, the wear verification qualification module 300 includes: a threshold setting unit and a wear degree confirmation unit.

[0107] The threshold setting unit is used to obtain the fracture area threshold and wear depth threshold of the three-column groove shell.

[0108] The wear degree confirmation unit is used to determine that the three-column groove shell meets the design requirements if the wear depth is within the fracture area threshold and the wear mark depth threshold on each wear surface.

[0109] Optionally, in one embodiment of this application, the drive shaft three-column groove housing wear verification system 10 of this application embodiment further includes a redesigned test module.

[0110] The test module was redesigned so that if the wear depth of the three-column groove shell does not meet the preset requirements, the three-column groove shell is verified as unqualified.

[0111] It should be noted that the foregoing explanation of the embodiment of the drive shaft three-column groove housing wear verification method also applies to the drive shaft three-column groove housing wear verification system of this embodiment, and will not be repeated here.

[0112] The drive shaft three-post groove shell wear verification system proposed in this application can simulate the stress on the drive shaft three-post groove shell during actual vehicle operation by designing test parameters such as torque, loading speed, and loading time. It can simulate the wear of the three-post groove shell in actual vehicle operation and test the wear degree of the three-post groove shell, thereby realizing the effective verification of the drive shaft sliding joint. In this way, it can verify whether the designed sliding joint meets the operation requirements during the design stage, without having to perform cumbersome verification of the drive shaft sliding joint in the comprehensive reliability road test of the whole vehicle. This reduces the complexity of sliding joint verification, improves the efficiency of sliding joint verification, and ensures the accuracy of sliding joint verification.

[0113] This solves the technical problem in related technologies where the wear strength of the slip joint needs to be verified in road tests, but the wear strength of the slip joint cannot be effectively verified in the design stage, which makes the verification of the slip joint quite cumbersome.

[0114] Figure 5 This is a schematic diagram of the drive shaft three-column groove shell wear testing device provided in an embodiment of this application. The drive shaft three-column groove shell wear testing device may include:

[0115] The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0116] When the processor 502 executes the program, it implements the drive shaft three-column groove housing wear verification method provided in the above embodiments.

[0117] Furthermore, the drive shaft three-column groove shell wear testing device also includes:

[0118] Communication interface 503 is used for communication between memory 501 and processor 502.

[0119] The memory 501 is used to store computer programs that can run on the processor 502.

[0120] The memory 501 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0121] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 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 (EIS) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 5 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.

[0122] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0123] Processor 502 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.

[0124] 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 verifying the wear of the drive shaft three-column groove housing.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage 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 storage 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 storage 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 storage medium could 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A method for verifying wear of a three-column groove housing of a drive shaft, characterized in that, The wear verification method for the three-column groove housing of the drive shaft includes: Obtain the torque loading value, loading time, and speed loading value of the drive shaft; After the drive shaft is installed, the drive shaft is tested according to the torque loading value, the loading time, and the rotational speed loading value to obtain the wear depth of the three-column groove shell connected to the sliding joint in the drive shaft; The verification result of the three-column groove shell is determined based on the wear depth of the three-column groove shell. The acquisition of the torque loading value, loading time, and speed loading value of the drive shaft specifically includes: Obtain the target specifications of the drive shaft, and obtain the torque loading value of the drive shaft based on the target specifications; The input torque and transmission ratio of each gear of the transmission are obtained, and the loading time of the drive shaft is calculated based on the input torque, the transmission ratio and the torque loading value. Obtain the rotational speed range of the drive shaft, and determine the rotational speed load value of the drive shaft based on the rotational speed range; The process of acquiring the input torque and gear ratio of each gear in the transmission, and calculating the loading time of the drive shaft based on the input torque, the gear ratio, and the torque loading value, specifically includes: Obtain the input torque and transmission ratio corresponding to each gear of the transmission; For each gear of the transmission, the first time of the transmission is obtained based on the input torque and the transmission ratio; The output torque of the transmission is calculated based on the transmission ratio and the input torque. The second time of the drive shaft is calculated based on the output torque, the torque loading value, and the first time. The sum of the second times for each gear of the transmission is taken as the loading time of the drive shaft.

2. The wear verification method for the three-column groove housing of the drive shaft according to claim 1, characterized in that, After the drive shaft is installed, the drive shaft is tested according to the torque loading value, the loading time, and the rotational speed loading value to obtain the wear depth of the three-column groove housing connected to the sliding joint in the drive shaft. Prior to this, the process also includes: Obtain the arrangement angle of the drive shaft, and install the drive shaft into the test device according to the arrangement angle.

3. The wear verification method for the three-column groove housing of the drive shaft according to claim 2, characterized in that, After the drive shaft is installed, it is tested according to the torque loading value, the loading time, and the rotational speed loading value to obtain the wear depth of the three-column groove housing connected to the sliding joint in the drive shaft, specifically including: The sliding joint of the drive shaft is subjected to the loading time based on the torque loading value and the rotational speed loading value to obtain the drive shaft after the test; The wear depth of each wear surface of the three-column groove shell in the drive shaft after the test was obtained by using a probe.

4. The wear verification method for the three-column groove housing of the drive shaft according to claim 1, characterized in that, The step of determining the verification result of the three-column groove shell based on the wear depth of the three-column groove shell specifically includes: Obtain the fracture area threshold and wear depth threshold of the three-column groove shell; If the wear depth is within the threshold of the fracture area and the threshold of the wear mark on each wear surface, then the three-column groove shell is determined to meet the design requirements.

5. The method for verifying wear of the three-column groove housing of the drive shaft according to claim 1, characterized in that, After the drive shaft is installed, the drive shaft is tested according to the torque loading value, the loading time, and the rotational speed loading value to obtain the wear depth of the three-column groove housing connected to the sliding joint in the drive shaft. The process then includes: If the wear depth of the three-column groove shell does not meet the preset requirements, the three-column groove shell is verified as unqualified.

6. A wear verification system for a three-column groove housing of a drive shaft, characterized in that, The drive shaft three-column groove housing wear verification system is applied to the drive shaft three-column groove housing wear verification method according to any one of claims 1-5, and the drive shaft three-column groove housing wear verification system includes: The parameter design module is used to obtain the torque loading value, loading time, and speed loading value of the drive shaft. The wear test module is used to test the drive shaft according to the torque loading value, the loading time, and the rotational speed loading value after the drive shaft is installed, and to obtain the wear depth of the three-column groove shell connected to the sliding joint in the drive shaft; The wear verification qualification module is used to determine the verification result of the three-column groove shell based on the wear depth of the three-column groove shell.

7. A wear testing device for a three-column groove shell of a drive shaft, characterized in that, The drive shaft three-column groove housing wear testing device includes: a memory, a processor, and a drive shaft three-column groove housing wear verification program stored in the memory and executable on the processor. When the drive shaft three-column groove housing wear verification program is executed by the processor, it implements the steps of the drive shaft three-column groove housing wear verification method as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a drive shaft three-column groove housing wear verification program, which, when executed by a processor, implements the steps of the drive shaft three-column groove housing wear verification method as described in any one of claims 1-5.

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