CN117906949A - Method, system, device and medium for verifying abrasion of three-column casing of driving shaft - Google Patents

Abstract

The application discloses a method, a system, a device and a medium for verifying the abrasion of a driving shaft three-column casing, wherein the method for verifying the abrasion of the driving shaft three-column casing comprises the following steps: acquiring test parameters of a driving shaft; the test parameters comprise a torque loading value, loading time and a rotating speed loading value; after the driving shaft is installed, testing the driving shaft according to the torque loading value, the loading time and the rotating speed loading value to obtain the abrasion depth of a three-column groove shell connected with the sliding joint in the driving shaft; and if the abrasion depth of the three-column groove shell meets the preset requirement, finishing verification. The application reduces the complexity of the sliding joint verification, improves the efficiency of the sliding joint verification and ensures the accuracy of the sliding joint verification.

Description

Method, system, device and medium for verifying abrasion of three-column casing of driving shaft

Technical Field

The application relates to the technical field of automobile transmission systems, in particular to a method, a system, a test device and a computer readable storage medium for verifying abrasion of a three-column shell of a driving shaft.

Background

The drive shaft is an important component of the transmission system of the automobile and is mainly used for transmitting the power output by the power assembly to the drive wheels. Slip joints (constant velocity joints) are important guiding and connecting parts in the drive shaft, which are subjected to such large variable loads during running of the vehicle. The three pin joint (three ball pin) of the driving shaft sliding joint is connected with the three-column groove shell, and in the whole vehicle running process, the three pin joint assembly in the sliding joint moves back and forth in the three-column groove because of the position change of the power assembly or (and) wheels, and the three-column groove shell is subjected to a friction force formed by the action of the ball ring due to the sliding friction and rolling friction of the three ball pin, so that the abnormal sound of the driving shaft is caused, namely the three-column groove shell connected with the sliding joint is worn by the friction force of the three ball pin, so that the abnormal sound of the driving shaft is caused, and the like.

However, in the existing design scheme, the sliding joint can only be verified in the road test of the comprehensive reliability of the whole vehicle, namely the abrasion strength of the sliding joint needs to be verified in the road test, and the abrasion strength of the sliding joint cannot be effectively verified in the design stage, so that the high verification cost and long period of the sliding joint are caused; meanwhile, if the verification result does not meet the use requirement of the whole vehicle, more time and more cost are consumed for redesigning the sliding section, and the development progress of the whole vehicle is influenced.

Accordingly, the prior art is still in need of improvement and development.

Disclosure of Invention

The application mainly aims to provide a driving shaft three-column groove shell abrasion verification method and system, a driving shaft three-column groove shell abrasion test device and a computer readable storage medium, and aims to solve the problems that in the prior art, abrasion strength of a sliding joint needs to be verified in a road test, the abrasion strength of the sliding joint cannot be effectively verified in a design stage, and therefore verification of the sliding joint is complicated. An embodiment of a first aspect of the present application provides a method for verifying wear of a three-column casing of a drive shaft, including the steps of: acquiring a torque loading value, loading time and a rotating speed loading value of a driving shaft; after the driving shaft is installed, testing the driving shaft according to the torque loading value, the loading time and the rotating speed loading value to obtain the abrasion depth of a three-column groove shell connected with the sliding joint in the driving shaft; and judging the verification result of the three-column groove shell according to the abrasion depth of the three-column groove shell.

According to the technical means, the embodiment of the application simulates the stress condition of the driving shaft three-column groove shell in the actual vehicle operation by designing the test parameters of torque, loading rotating speed and loading time, and carries out actual vehicle abrasion simulation on the three-column groove shell and tests the abrasion degree of the three-column groove shell, so that the effective verification of the sliding joint of the driving shaft is realized, and further, whether the designed sliding joint meets the operation requirement can be verified in the design stage, the complicated verification of the sliding joint of the driving shaft is not required in the road test of the comprehensive reliability of the whole vehicle, the complexity of the verification of the sliding joint is reduced, the verification efficiency of the sliding joint is improved, and the verification accuracy of the sliding joint is ensured.

Optionally, in one embodiment of the present application, the obtaining a torque loading value, loading time and a rotation speed loading value of the driving shaft specifically includes: obtaining a target specification of the driving shaft, and obtaining a torque loading value of the driving shaft according to the target specification; acquiring input torque and a transmission ratio of each gear of a transmission, and calculating loading time of the driving shaft according to the input torque, the transmission ratio and the torque loading value; and acquiring the rotating speed range of the driving shaft, and determining the rotating speed loading value of the driving shaft according to the rotating speed range.

According to the technical means, the embodiment of the application designs the test parameters comprising the torque loading value, the rotating speed loading value and the loading time, wherein the test parameters are obtained based on equivalent analysis and design of the wear degree of the three-column casing, so that the accuracy of verifying the three-column casing of the sliding joint can be ensured, the wear strength of the three-column casing can be rapidly and accurately verified in the design stage, and the wear verification cost and the verification period of the sliding joint of the driving shaft can be effectively reduced.

Optionally, in one embodiment of the present application, the obtaining input torque and a gear ratio of each gear of the transmission, and calculating the loading time of the driving shaft according to the input torque, the gear ratio and the torque loading value specifically includes: acquiring input torque and a transmission ratio corresponding to each gear of the transmission; obtaining a first time of the transmission according to the input torque and the gear ratio for each gear of the transmission; calculating an output torque of the transmission based on the gear ratio and the input torque; calculating a second time of the drive shaft based on the output torque, the torque loading value, and the first time; and adding the sum of all the second times of all the gears of the transmission to obtain the loading time of the driving shaft.

According to the technical means, the loading time in the test parameters is designed based on the equivalent analysis of the abrasion degree of the three-column groove shell, so that the accuracy of verification of the three-column groove shell of the sliding joint can be ensured, the rotating speed loading value and the loading time can be regulated, the purpose of rapidly and accurately verifying the abrasion strength of the three-column groove shell in the design stage is realized, the complexity of verification is reduced, and the abrasion verification cost and the verification period of the sliding joint of the driving shaft are effectively reduced.

Optionally, in an embodiment of the present application, after the driving shaft is installed, testing the driving shaft according to the torque loading value, the loading time and the rotation speed loading value to obtain a wear depth of a three-column casing connected with a sliding joint in the driving shaft, and before the testing, further includes: and obtaining an arrangement included angle of the driving shaft, and installing the driving shaft into a test device according to the arrangement included angle.

According to the technical means, as the arrangement angle of the driving shaft is larger, the abrasion of the three-ball pin in the sliding joint to the three-column groove shell is larger, the arrangement angle is set to be the maximum arrangement angle of a common automobile, so that the design requirement can be met under the condition that the three-column groove shell is larger in abrasion, the effectiveness of the verified driving shaft sliding joint is further ensured, and the application range of the driving shaft is improved

Optionally, in one embodiment of the present application, after the driving shaft is installed, the driving shaft is tested according to the torque loading value, the loading time and the rotation speed loading value, so as to obtain the wear depth of the three-column groove shell connected with the sliding joint in the driving shaft, which specifically includes: loading the loading time for the sliding joint of the driving shaft according to the torque loading value and the rotating speed loading value to obtain a tested driving shaft; and testing the three-column groove shell in the driving shaft after the test by adopting a probe to obtain the abrasion depth of each abrasion surface of the three-column groove shell.

According to the technical means, the abrasion depth of each abrasion surface in the three-column groove shell after the test is detected, so that the abrasion depth of each abrasion surface is ensured to meet the requirements, and the reliability of verification of the sliding joint is further improved.

Optionally, in an embodiment of the present application, the determining, according to the wear depth of the three-column casing, a verification result of the three-column casing specifically includes: acquiring a fragmentation area threshold value and a grinding mark depth threshold value of the three-column groove shell; and if the abrasion depth is respectively within the fragmentation area threshold value and the abrasion mark depth threshold value on each abrasion surface, judging that the three-column groove shell meets the design requirement.

According to the technical means, the embodiment of the application verifies whether the design of the sliding joint meets the requirements or not in the design stage of the sliding joint, and compared with the prior art, the design cycle of the sliding joint is reduced without spending more cost for verification.

Optionally, in one embodiment of the present application, after the driving shaft is installed, the driving shaft is tested according to the torque loading value, the loading time and the rotation speed loading value, so as to obtain a wear depth of a three-column groove shell connected with a sliding joint in the driving shaft, and then the method further includes: and if the abrasion depth of the three-column groove shell does not meet the preset requirement, the three-column groove shell is verified to be unqualified.

According to the technical means, the embodiment of the application verifies whether the design of the sliding joint meets the requirements or not in the design stage of the sliding joint, and if the design of the sliding joint does not meet the requirements, the design is directly redesigned and verified again, and compared with the prior art, the design cycle of the sliding joint is reduced without more cost for verification.

A second aspect of the present application provides a drive shaft three-post housing wear verification system comprising: the parameter design module is used for obtaining a torque loading value, loading time and a rotating speed loading value of the driving shaft; the abrasion testing module is used for testing the driving shaft according to the torque loading value, the loading time and the rotating speed loading value after the driving shaft is installed, so as to obtain the abrasion depth of a three-column groove shell connected with the sliding joint in the driving shaft; and the wear verification qualification module is used for judging the verification result of the three-column groove shell according to the wear depth of the three-column groove shell.

Optionally, in one embodiment of the present application, the parameter design module includes: a torque design unit, a time design unit and a rotation speed design unit; the torque design unit is used for obtaining a target specification of the driving shaft and obtaining a torque loading value of the driving shaft according to the target specification; the time design unit is used for obtaining input torque and transmission ratio of each gear of the transmission and calculating loading time of the driving shaft according to the input torque, the transmission ratio and the torque loading value; and the rotating speed design unit is used for acquiring the rotating speed range of the driving shaft and determining the rotating speed loading value of the driving shaft according to the rotating speed range.

Optionally, in one embodiment of the present application, the time design unit includes: a transmission gear data acquisition subunit, a transmission gantry 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; the transmission gear data acquisition subunit is used for acquiring input torque and transmission ratio corresponding to each gear of the transmission; a transmission gantry run time determination subunit configured to obtain, for each gear of the transmission, a first time of the transmission according to the input torque and the gear ratio; a transmission output torque calculation subunit for calculating an output torque of the transmission according to the gear ratio and the input torque; a drive shaft run time determination subunit configured to calculate a 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 calculating subunit is used for taking the sum value of all the second times of all the gears of the transmission as the loading time of the drive shaft.

Optionally, in one embodiment of the present application, the drive shaft three-column casing wear verification system of the embodiment of the present application further includes an arrangement included angle design unit; and the arrangement included angle design and driving shaft installation unit is used for acquiring the arrangement included angle of the driving shaft and installing the driving shaft into the test device according to the arrangement included angle.

Optionally, in one embodiment of the present application, the wear test module includes: the test starting unit and the sliding joint testing unit; the test starting unit is used for loading the loading time for the sliding joint of the driving shaft according to the torque loading value and the rotating speed loading value to obtain a tested driving shaft; and the sliding joint testing unit is used for testing the three-column groove shell in the driving shaft after the test by adopting a probe to obtain the abrasion depth of each abrasion surface of the three-column groove shell.

Optionally, in one embodiment of the present application, the wear verification pass module includes: a threshold setting unit and a wear degree confirmation unit; the threshold setting unit is used for acquiring a fragmentation area threshold and a grinding mark depth threshold of the three-column groove shell; and the abrasion degree confirming unit is used for judging that the three-column groove shell meets the design requirement if the abrasion depth is respectively within the fragmentation area threshold value and the abrasion mark depth threshold value on each abrasion surface.

Optionally, in one embodiment of the present application, the drive shaft three-column housing wear verification system of the embodiment of the present application further comprises a redesign test module; and the redesign test module is used for verifying that the three-column groove shell is unqualified if the abrasion depth of the three-column groove shell does not meet the preset requirement.

An embodiment of the third aspect of the present application provides a drive shaft three-column casing wear test device, including: the drive shaft three-column casing wear verification method comprises a memory, a processor and a drive shaft three-column casing wear verification program which is stored in the memory and can run on the processor, wherein the drive shaft three-column casing wear verification program realizes the steps of the drive shaft three-column casing wear verification method according to the embodiment when being executed by the processor.

A fourth aspect of the present application provides a computer-readable storage medium storing a driveshaft three-column housing wear verification program which, when executed by a processor, implements the steps of the driveshaft three-column housing wear verification method described in the above embodiments.

The application has the beneficial effects that:

(1) According to the embodiment of the application, the test parameters comprising the torque loading value, the rotating speed loading value and the loading time are designed based on equivalent analysis of the abrasion degree of the three-column shell, so that the accuracy of the three-column shell verification of the sliding joint can be ensured, the abrasion strength of the three-column shell can be rapidly and accurately verified in the design stage, and the abrasion verification cost and the verification period of the sliding joint of the driving shaft can be effectively reduced.

(2) According to the embodiment of the application, the stress condition of the three-column groove shell of the driving shaft in the actual vehicle operation is simulated through the test parameters of the design torque, the loading rotating speed and the loading time, the actual vehicle abrasion simulation is carried out on the three-column groove shell, and the abrasion degree of the three-column groove shell is tested, so that the effective verification of the sliding joint of the driving shaft is realized, and further, whether the designed sliding joint meets the operation requirement can be verified in the design stage, the complicated verification of the sliding joint of the driving shaft in the road test of the comprehensive reliability of the whole vehicle is not needed, the complexity of the verification of the sliding joint is reduced, the verification efficiency of the sliding joint is improved, and the verification accuracy of the sliding joint is ensured.

(3) The application embodiment verifies whether the sliding joint meets the requirements or not in the sliding joint design stage, if the sliding joint meets the requirements, the sliding joint is directly redesigned and verified again, and compared with the prior art, the sliding joint design method and device do not need to spend more cost for verification, and the sliding joint design period is shortened.

(4) According to the embodiment of the application, the abrasion depth of each abrasion surface in the three-column groove shell after the test is detected, so that the abrasion depth of each abrasion surface is ensured to meet the requirement, and the reliability of verification of the sliding joint is further improved.

Additional aspects and advantages of the 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 the application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the structure of a preferred embodiment of the drive shaft three-column housing wear test device of the present application;

FIG. 2 is a flow chart of a preferred embodiment of the drive shaft three-column housing wear verification method of the present application;

FIG. 3 is a flow chart showing the steps of the whole execution process in the preferred embodiment of the method for verifying the wear of the three-column casing of the driving shaft according to the present application;

FIG. 4 is a schematic diagram of a preferred embodiment of a drive shaft three-column housing wear verification system of the present application;

FIG. 5 is a schematic view of a three-column casing wear test device for a drive shaft according to a preferred embodiment of the present application.

The device comprises a first fixing table 11, a driving device 12, a sliding joint 13, a test piece 14, a fixing joint 15 and a second fixing table 16; 10-a drive shaft three-column housing wear verification system; 100-parameter design module, 200-abrasion test module and 300-abrasion verification qualification module; 501-memory, 502-processor and 503-communication interface.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.

The following describes a method, a system, a device and a medium for verifying the wear of a three-column casing of a driving shaft according to an embodiment of the present application with reference to the accompanying drawings. Aiming at the problems that in the related art mentioned in the background art, the abrasion strength of a sliding joint needs to be verified in a road test, and the abrasion strength of the sliding joint cannot be effectively verified in a design stage, so that the verification of the sliding joint is complicated. Therefore, the technical problem that the abrasion strength of the sliding joint needs to be verified in a road test in the related technology and cannot be effectively verified in a design stage is solved, so that the verification of the sliding joint is complicated is solved.

First, a three-column casing wear test device for a drive shaft as an execution body and a drive shaft mounted in the test device in the embodiment of the present application will be described as follows:

Referring to fig. 1, the driving shaft three-column shell abrasion test device comprises a driving device 12 for providing torque, a first fixing table 11 for installing the driving device 12 and a second fixing table 16 for installing a test piece 14 (namely, a driving shaft fixing joint 15), wherein a first sliding rail is arranged on the first fixing table 11, the driving device 12 can move back and forth (along the left-right direction or the front-back direction of fig. 1), a second sliding rail is arranged on the second fixing table 16, and the installation position of the test piece 14 (namely, the driving shaft) can be adjusted up and down so as to meet test tests of test pieces with different angles and lengths, namely, the angle of the test piece can be adjusted, enough torque for test is provided, and meanwhile, the test pieces with different lengths need to be tested. Specifically, the driving device 12 is used for fixing the driving shaft sliding joint 13, outputting a set test torque T according to a test input requirement, the second fixing table 16 is used for simulating a real vehicle assembling state to be connected with the test piece driving shaft fixing joint, the driving device is mounted on the first sliding rail, and the driving shaft fixing joint is mounted on the second sliding rail and can slide to adjust the length of the test piece and different arrangement angles.

The driving shaft test piece 14 capable of being installed by the test device comprises a shaft lever, a fixed joint, a sliding joint and a bracket, wherein the fixed joint is arranged at a position, close to one end, on the shaft lever, the sliding joint is arranged at a position, close to the other end, on the shaft lever, the shaft lever is connected with the bracket through a bearing, and the bracket is positioned at one side, far from the fixed joint, of the sliding joint; and dustproof covers are arranged between the shaft lever and the fixed joint and between the shaft lever and the sliding joint, the two dustproof covers are positioned between the fixed joint and the sliding joint, the fixed joint is used for connecting a brake, and the sliding joint is used for connecting a transmission. Specifically, the sliding joint comprises a three-column groove shell, a three-pin type constant velocity universal joint comprises a three-column groove shell, a three-fork joint, a ball ring, a rolling needle retainer ring and a clamp spring, and a certain gap is reserved between a ball channel of the three-column groove shell and the ball ring of the three-column pin inner assembly so as to support sliding of the three-column pin.

Meanwhile, in order to facilitate understanding of the present application, embodiments of the present application will be briefly described herein:

according to the embodiment of the application, the stress condition of the driving shaft three-column groove shell in the actual vehicle operation is simulated by calculating and designing the test parameters such as the torque, the arrangement angle, the loading rotation speed and the like born by the driving shafts corresponding to different vehicle types, the actual vehicle abrasion simulation is carried out on the driving shaft three-column groove shell, and whether the driving shaft three-column groove design meets the use requirement of the whole vehicle is judged by measuring the depth of the abrasion surface in the three-column groove shell test, so that the problems of high cost and long period caused by the fact that the driving shaft sliding joint abrasion verification needs to be verified in the whole vehicle road test are effectively solved. According to the embodiment of the application, whether the drive shaft model design meets the use requirement of the whole vehicle can be evaluated by measuring the abrasion depth of the three-column shell after the test, so that the effects of shortening the drive shaft design verification period and reducing the design research and development cost are achieved.

Specifically, fig. 2 is a schematic flow chart of a method for verifying wear of a three-column casing of a driving shaft according to an embodiment of the present application.

As shown in fig. 2, the method for verifying the wear of the three-column casing of the driving shaft comprises the following steps:

in step S101, test parameters of the drive shaft are acquired; the test parameters comprise a torque loading value, loading time and a rotating speed loading value.

In one possible implementation, the calculation of the test parameters, i.e. the calculation of the bench-verified torque loading value T, the bench-verified rotational speed loading value n and the bench-verified loading time T, is performed by the model of the real vehicle drive axle. Taking the section type application condition into consideration, acquiring a target specification of the driving shaft, obtaining a static torque strength value of the driving shaft according to the target specification, and calculating a torque loading value T of the driving shaft according to the static torque strength value; acquiring input torque and a transmission ratio of each gear of a transmission, and calculating loading time t of the driving shaft according to the input torque, the transmission ratio and the torque loading value; according to road spectrum acquisition information of a past vehicle type, the common vehicle speed in the whole vehicle operation is 30Km/h-120Km/h, the rotating speed range of the driving shaft is obtained, namely the rotating speed range is converted into the rotating speed of the driving shaft to be about 250r/min-1000r/min, the rotating speed loading value n of the driving shaft is determined according to the rotating speed range, under the condition that the test cycle times are the same, the faster the rotating speed, the shorter the required test time, but the too high the rotating speed can cause overheat of equipment, and according to the conditions, the rotating speed loading value n is set to be 300r/min in one embodiment.

It will be appreciated that the static torque strength of the drive shaft is indicative of the maximum torque that the drive shaft can withstand in the torsional direction, and that the drive shaft may break when this torque value is reached. The actual value is determined by referencing the design specification and materials of the drive shaft. When the static torque strength of the driving shaft is calculated, the section type is preliminarily selected according to the torque transmitted to the driving shaft by the power assembly, then the movable section and the fixed section are installed according to the positions of the power assembly and the hub bearing, and finally the static torque strength value is calculated. In this embodiment, the torque loading value is a static torque strength value/2.5, the test loading torque value is executed according to the static torque strength/2.5 corresponding to the specification of the driving shaft, taking 2600size as an example, the static torque strength requirement is more than or equal to 3700Nm, and then the wear test loading torque value: 3700/2.5=1480 Nm.

It is worth to say that, according to the embodiment of the application, through designing the test parameters including the torque loading value, the rotating speed loading value and the loading time, the test parameters are designed based on equivalent analysis of the abrasion degree of the three-column casing, the accuracy of the three-column casing verification of the sliding joint can be ensured, the abrasion strength of the three-column casing can be rapidly and accurately verified in the design stage, and therefore the abrasion verification cost and the verification period of the sliding joint of the driving shaft can be effectively reduced.

In one possible implementation manner, in the process of calculating the loading time t of the driving shaft, firstly, input torque and transmission ratio corresponding to each gear of the transmission are obtained; according to the input torque and the transmission ratio, obtaining first time of the transmission according to each gear of the transmission, wherein the first time is obtained based on preset abrasion degree of a three-column groove shell caused by a three-ball pin of a sliding joint, and when the abrasion degree of the three-column groove shell caused by each gear of the transmission is basically consistent, the time required to run under the input torque corresponding to the input shaft rotating speed (4000 r/min) is the first time; calculating an output torque of the transmission based on the gear ratio and the input torque; calculating a second time of the drive shaft based on the output torque, the torque loading value, and the first time; and taking the sum value of all the second times of all the gears of the transmission as the loading time of the driving shaft.

It should be noted that, in the embodiment of the application, equivalent analysis is performed according to the actual vehicle road spectrum of the driving shaft to obtain the input torque and the running time of each gear of the transmission; and converting according to the ratio of the test torque to obtain the running time required by the test under each gear. That is, the total gear position at 4000r/min of the transmission input shaft results in a wear condition of the three-column housing corresponding to the running time being identical to the test wear condition of the three-column housing at the total loading time at the intermediate gear load value in the test device, and the loading time t is obtained based on the wear condition.

Table 1: data sheet of transmission input speed, input torque, gear ratio and transmission rack operation time in each gear

Table 2: data sheet of drive shaft static torque strength, transmission output torque, torque loading value, ratio conversion and test loading time under each gear

Therefore, the total time of the test loading time of each gear is rounded, and the test loading time of the embodiment of the application is determined to be 80h.

It is worth to say that the loading time in the test parameters of the embodiment of the application is designed based on equivalent analysis of the abrasion degree of the three-column groove shell, so that the accuracy of verification of the three-column groove shell of the sliding joint can be ensured, the rotating speed loading value and the loading time can be regulated, the purpose of rapidly and accurately verifying the abrasion strength of the three-column groove shell in the design stage is realized, the complexity of verification is reduced, and the abrasion verification cost and the verification period of the sliding joint of the driving shaft are effectively reduced.

Taking the transmission gear i as an example, based on a real vehicle road spectrum (i.e., collected data information of a slip joint abrasion state of a driving shaft and each gear of the transmission), determining a transmission rack operation time (i.e., a first time) corresponding to an input shaft rotation speed and an input torque of the gear under a preset abrasion degree of a three-column casing, firstly obtaining transmission input shaft rotation speed 4000r/min, a transmission ratio 15.564 and input torque 168Nm, wherein the output torque is a product/2 (two shafts) of the input torque and the transmission ratio, namely 1681 x 15.564/2=1307 (output torque value), calculating a ratio of the output torque and a torque loading value, namely 1307/1480=0.883 (ratio), wherein the ratio is equal to a transmission rack operation time and a test operation time, calculating the test operation time (i.e., a second time), namely, multiplying the first time by the corresponding ratio is equal to the second time, namely 2.18x 0.883= 1.926 (second time), calculating a second time of all gears by the same principle, and adding to obtain the total loading time.

It will be appreciated that based on equivalent analysis means that the work done by the variator on the slip joint three-column housing is equal to the work done by the drive means (i.e. motor) of the test apparatus on the slip joint three-column housing. W=pt, 9550 p=tn, where W is work, P is motor power, T is time, and T is torque.

Prior to step S103, a bench verified drive shaft arrangement angle x4 is determined, i.e. the arrangement angle of the test drive shaft is determined to be 6 ° according to the design arrangement angle of a typical car, which is typically less than or equal to 6 °, and the drive shaft is installed into the test device according to the arrangement angle.

In one possible implementation, the drive shaft test piece is mounted on the test stand, the drive shaft sliding joint is connected with the drive device, the drive shaft fixing joint is connected with the second fixing stand, the drive shaft fixing joint is fastened with the fixing piece through a nut, the fastening moment is consistent with the mounting moment of the real vehicle, and the fixing piece can slide on the second sliding rail of the second fixing stand. According to experience, the arrangement angle of the driving shaft is 6 degrees, and the center of the sliding joint is within +/-5 mm of the theoretical design position. But is not limited thereto, the arrangement angle may be set to 3 °,5 °, or the like. Specifically, the sliding joint of the driving shaft test piece is connected with the driving device through a spline, the fixed joint of the driving shaft test piece is connected with the fixed piece on the second sliding rail through a spline, spline parameters are consistent with those of a real vehicle, and meanwhile, the fixed joint and the fixed piece are locked by adopting nuts, and locking torque is consistent with the real vehicle; and adjusting the positions of the driving device on the first sliding rail and the second sliding rail and setting initial test distance and angle.

It is worth to say that, as the arrangement angle of the driving shaft is larger, the abrasion of the three-ball pin in the sliding joint to the three-column groove shell is larger, the arrangement angle is set to be 6 degrees of the maximum arrangement angle of a common automobile, so that the design requirement can be met under the condition that the three-column groove shell is larger in abrasion, the effectiveness of the verified driving shaft sliding joint is further ensured, and the application range of the driving shaft is improved.

In step S102, after the driving shaft is installed, the driving shaft is tested according to the torque loading value, the loading time and the rotation speed loading value, so as to obtain the abrasion depth of the three-column groove shell connected with the sliding joint in the driving shaft.

In one possible implementation manner, after the driving shaft is installed in the test device, in the process of testing the abrasion depth of the three-column groove shell, starting the test, loading the sliding joint of the driving shaft for the loading time according to the torque loading value and the rotating speed loading value, namely, starting the driving device (namely, a motor) to install the torque loading value and the rotating speed loading value, loading and keeping the loading time, taking the driving shaft out of the test device after the driving shaft is loaded, obtaining the tested driving shaft, namely, disassembling a driving shaft test piece, disassembling the sliding joint of the test piece, disassembling a dust cover of the sliding joint by using a special tool, and taking out the three-pin joint assembly; and testing the three-column groove shell in the driving shaft after the test by adopting a probe to obtain the abrasion depth of each abrasion surface of the three-column groove shell. During the test of the drive shaft, air cooling was required to ensure that the test piece (drive shaft) temperature was 80 ℃.

It is worth to say that, according to the embodiment of the application, the abrasion depth of each abrasion surface in the three-column groove shell after the test is detected, so that the abrasion depth of each abrasion surface is ensured to meet the requirement, and the reliability of verification of the sliding joint is further improved.

In step S103, a verification result of the three-column casing is determined according to the wear depth of the three-column casing.

In one possible implementation, the method comprises the steps of obtaining a fragmentation area threshold (less than 10) and a grinding mark depth threshold (less than 0.045) of the three-column shell in the process of completing verification when the abrasion depth meets the preset requirement; and if the abrasion depth is respectively within the fragmentation area threshold value and the abrasion mark depth threshold value on each abrasion surface, judging that the three-column groove shell meets the design requirement.

Table 3: evaluation criterion for fracture area and grinding mark depth of three-column shell

The probe is used for detecting the abrasion depth of each abrasion surface in the three-column groove shell, and if the test result meets the standard of 10.2.7B stages or more in the 'JBT 10189-2016 constant velocity universal joint for rolling bearing automobiles and the assembly thereof', the design can meet the service life requirement of the whole automobile, otherwise, the design needs to be redesigned.

It can be understood that the sliding joint in the driving shaft in the embodiment of the application needs to meet the preset requirement so as to ensure that abnormal sound cannot occur in the actual driving process of the driving shaft, and if the abrasion depth of the three-column casing does not meet the preset requirement, the three-column casing after redesign is tested until the three-column casing meets the preset requirement to complete abrasion verification.

It is worth to be noted that, the embodiment of the application verifies whether the design of the sliding joint meets the requirement or not in the design stage of the sliding joint, and if the design of the sliding joint does not meet the requirement, the design is directly redesigned and verified again, and compared with the prior art, the design cycle of the sliding joint is reduced without spending more cost for verification.

The overall implementation is further described in terms of the steps for performing the drive shaft three-column housing wear verification method of the present application, as shown in fig. 3:

step S1, setting test parameters: calculating a test loading torque value T, a test rotating speed n and a test time T according to a drive shaft universal joint selected by the whole vehicle;

And S2, starting a test. Starting the driving motor to start loading torque, and starting the test. Note that: air cooling is required during the test, so that the temperature of the test piece is ensured to be less than or equal to 80 ℃;

S3, after the test is finished, the driving shaft is taken down, the driving shaft test piece is disassembled, the sliding joint of the test piece is disassembled, a special tool is used for disassembling the dust cover of the sliding joint, and the three-pin joint assembly is taken out;

S4, testing, namely detecting the abrasion depth of each abrasion surface in the three-column groove shell by using a probe;

And S5, the test result meets the standard of 10.2.7B stages in the 'JBT 10189-2016 constant velocity universal joint for rolling bearing automobiles and the assembly thereof', and the design can meet the service life requirement of the whole automobile.

And S5, if the test result does not meet the standard design, the step S1-S5 is required to be continuously executed by redesigning until the requirement is met.

In summary, the embodiment of the application can simulate the stress condition of the driving shaft three-column groove shell in the actual vehicle operation through the test parameters of design torque, loading rotating speed and loading time, and simulate the actual vehicle abrasion of the three-column groove shell and test the abrasion degree of the three-column groove shell, thereby realizing the effective verification of the sliding joint of the driving shaft, further verifying whether the designed sliding joint meets the operation requirement in the design stage, avoiding the complex verification of the sliding joint of the driving shaft in the road test of the comprehensive reliability of the whole vehicle, reducing the complexity of the verification of the sliding joint, improving the verification efficiency of the sliding joint and ensuring the verification accuracy of the sliding joint.

A drive shaft three-column housing wear verification system according to an embodiment of the present application will be described next with reference to the accompanying drawings.

Fig. 4 is a block schematic diagram of a drive shaft three-column housing wear verification system according to an embodiment of the application.

As shown in fig. 4, the drive shaft three-column housing wear verification system 10 includes: a parameter design module 100, a wear test module 200, and a wear verification pass module 300.

Specifically, the parameter design module 100 is configured to obtain a torque loading value, loading time and a rotational speed loading value of the driving shaft;

The abrasion testing module 200 is used for testing the driving shaft according to the torque loading value, the loading time and the rotating speed loading value after the driving shaft is installed, so as to obtain the abrasion depth of a three-column groove shell connected with the sliding joint in the driving shaft;

And the wear verification qualification module 300 is used for judging the verification result of the three-column groove shell according to the wear depth of the three-column groove shell.

Optionally, in one embodiment of the present application, the parameter design module 100 includes: torque design unit, time design unit and rotational speed design unit.

And the torque design unit is used for acquiring the target specification of the driving shaft and obtaining a torque loading value of the driving shaft according to the target specification.

And the time design unit is used for acquiring the input torque and the transmission ratio of each gear of the transmission and calculating the loading time of the driving shaft according to the input torque, the transmission ratio and the torque loading value.

And the rotating speed design unit is used for acquiring the rotating speed range of the driving shaft and determining the rotating speed loading value of the driving shaft according to the rotating speed range.

Optionally, in one embodiment of the present application, the time design unit includes: a transmission gear data acquisition subunit, a transmission gantry run time determination subunit, a transmission output torque calculation subunit, a driveshaft run time determination subunit, and a driveshaft loading time calculation subunit.

The transmission gear data acquisition subunit is used for acquiring input torque and transmission ratio corresponding to each gear of the transmission.

And the transmission rack running time determining subunit is used for obtaining the first time of the transmission according to the input torque and the transmission ratio for each gear of the transmission.

And the transmission output torque calculating subunit is used for calculating the output torque of the transmission according to the transmission ratio and the input torque.

And the driving shaft running time determining subunit is used for calculating a second time of the driving shaft according to the output torque, the torque loading value and the first time.

And the drive shaft loading time calculating subunit is used for taking the sum value of all the second times of all the gears of the transmission as the loading time of the drive shaft.

Optionally, in one embodiment of the present application, the drive shaft three-column casing wear verification system 10 of the embodiment of the present application further comprises an arrangement included angle design unit;

And the arrangement included angle design and driving shaft installation unit is used for acquiring the arrangement included angle of the driving shaft and installing the driving shaft into the test device according to the arrangement included angle.

Alternatively, in one embodiment of the application, the wear test module 200 includes: and the test starting unit and the sliding joint testing unit.

And the test starting unit is used for loading the loading time to the sliding joint of the driving shaft according to the torque loading value and the rotating speed loading value to obtain the tested driving shaft.

And the sliding joint testing unit is used for testing the three-column groove shell in the driving shaft after the test by adopting a probe to obtain the abrasion depth of each abrasion surface of the three-column groove shell.

Optionally, in one embodiment of the application, the wear verification pass module 300 includes: a threshold setting unit and a wear degree confirmation unit.

The threshold setting unit is used for acquiring the fragmentation area threshold and the grinding mark depth threshold of the three-column groove shell.

And the abrasion degree confirming unit is used for judging that the three-column groove shell meets the design requirement if the abrasion depth is respectively within the fragmentation area threshold value and the abrasion mark depth threshold value on each abrasion surface.

Optionally, in one embodiment of the present application, the drive shaft three-post housing wear verification system 10 of an embodiment of the present application further comprises a redesign test module.

And the redesign test module is used for verifying that the three-column groove shell is unqualified if the abrasion depth of the three-column groove shell does not meet the preset requirement.

It should be noted that the foregoing explanation of the driving shaft three-column casing wear verification method embodiment is also applicable to the driving shaft three-column casing wear verification system of this embodiment, and will not be repeated herein.

According to the driving shaft three-column groove shell abrasion verification system provided by the embodiment of the application, the stress condition of the driving shaft three-column groove shell in the actual vehicle operation can be simulated through the test parameters of design torque, loading rotating speed and loading time, the actual vehicle abrasion simulation is carried out on the three-column groove shell, and the abrasion degree of the three-column groove shell is tested, so that the effective verification of the sliding joint of the driving shaft is realized, and further, whether the designed sliding joint meets the operation requirement can be verified in the design stage, the complicated verification of the sliding joint of the driving shaft is not required in the road test of the comprehensive reliability of the whole vehicle, the complexity of the sliding joint verification is reduced, the efficiency of the sliding joint verification is improved, and the accuracy of the sliding joint verification is ensured.

Therefore, the technical problem that the abrasion strength of the sliding joint needs to be verified in a road test in the related technology and cannot be effectively verified in a design stage is solved, so that the verification of the sliding joint is complicated is solved.

Fig. 5 is a schematic structural diagram of a driving shaft three-column casing wear test device according to an embodiment of the present application. The drive shaft three-column casing wear test device may include:

memory 501, processor 502, and a computer program stored on memory 501 and executable on processor 502.

The processor 502, when executing a program, implements the drive shaft three-column housing wear verification method provided in the above-described embodiments.

Further, the drive shaft three-column casing wear test device further includes:

a communication interface 503 for communication between the memory 501 and the processor 502.

Memory 501 for storing a computer program executable on processor 502.

The memory 501 may include high-speed RAM memory and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

If the memory 501, the processor 502, and the communication interface 503 are implemented independently, the communication interface 503, the memory 501, and the processor 502 may be connected to each other via a bus and perform communication with each other. The bus may be an industry standard architecture (Industry Standard Architecture, abbreviated ISA) bus, a Peripheral Component Interconnect (PCI) bus, an extended industry standard architecture (Extended Industry StandardArchitecture, abbreviated EIS) bus, or the like. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 5, but not only one bus or one type of bus.

Alternatively, in a specific implementation, if the memory 501, the processor 502, and the communication interface 503 are integrated on a chip, the memory 501, the processor 502, and the communication interface 503 may perform communication with each other through internal interfaces.

The processor 502 may be a central processing unit (Central Processing Unit, abbreviated as CPU), or an Application SPECIFIC INTEGRATED Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the application.

The present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the drive shaft three-column casing wear verification method as above.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.

Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable storage medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable storage medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer cartridge (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable storage medium may even be paper or other suitable medium upon which the program is printed, as the program may be electronically captured, via optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.

The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

It is to be understood that the application is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.

Claims (10)

1. A drive shaft three-column casing wear verification method, characterized by comprising:

acquiring a torque loading value, loading time and a rotating speed loading value of a driving shaft;

After the driving shaft is installed, testing the driving shaft according to the torque loading value, the loading time and the rotating speed loading value to obtain the abrasion depth of a three-column groove shell connected with a sliding joint in the driving shaft;

And judging the verification result of the three-column groove shell according to the abrasion depth of the three-column groove shell.

2. The method for verifying wear of a three-column casing of a drive shaft according to claim 1, wherein the step of obtaining a torque loading value, loading time and rotational speed loading value of the drive shaft comprises the following steps:

Obtaining a target specification of the driving shaft, and obtaining a torque loading value of the driving shaft according to the target specification;

acquiring input torque and a transmission ratio of each gear of a transmission, and calculating loading time of the driving shaft according to the input torque, the transmission ratio and the torque loading value;

And acquiring the rotating speed range of the driving shaft, and determining the rotating speed loading value of the driving shaft according to the rotating speed range.

3. The method for verifying wear of a three-column casing of a drive shaft according to claim 2, wherein the steps of obtaining an input torque and a gear ratio of each gear of the transmission, and calculating a loading time of the drive shaft according to the input torque, the gear ratio and the torque loading value comprise:

acquiring input torque and a transmission ratio corresponding to each gear of the transmission;

Obtaining a first time of the transmission according to the input torque and the gear ratio for each gear of the transmission;

calculating an output torque of the transmission based on the gear ratio and the input torque;

calculating a second time of the drive shaft based on the output torque, the torque loading value, and the first time;

and taking the sum value of all the second times of all the gears of the transmission as the loading time of the driving shaft.

4. The method for verifying wear of a three-column casing of a drive shaft according to claim 1, wherein 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 a wear depth of the three-column casing connected with a slip joint in the drive shaft, and further comprising:

And obtaining an arrangement included angle of the driving shaft, and installing the driving shaft into a test device according to the arrangement included angle.

5. The method for verifying wear of a three-column casing of a drive shaft according to claim 2, wherein 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 casing connected with a slip joint in the drive shaft, specifically comprising:

Loading the loading time for the sliding joint of the driving shaft according to the torque loading value and the rotating speed loading value to obtain a tested driving shaft;

And testing the three-column groove shell in the driving shaft after the test by adopting a probe to obtain the abrasion depth of each abrasion surface of the three-column groove shell.

6. The method for verifying wear of a three-column casing of a drive shaft according to claim 1, wherein the determining a verification result of the three-column casing based on the wear depth of the three-column casing specifically comprises:

acquiring a fragmentation area threshold value and a grinding mark depth threshold value of the three-column groove shell;

and if the abrasion depth is respectively within the fragmentation area threshold value and the abrasion mark depth threshold value on each abrasion surface, judging that the three-column groove shell meets the design requirement.

7. The method for verifying wear of a three-column casing of a drive shaft according to claim 1, wherein 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 a wear depth of the three-column casing connected with a slip joint in the drive shaft, and further comprising:

and if the abrasion depth of the three-column groove shell does not meet the preset requirement, the three-column groove shell is verified to be unqualified.

8. A drive shaft three-column housing wear verification system, the drive shaft three-column housing wear verification system comprising:

the parameter design module is used for obtaining a torque loading value, loading time and a rotating speed loading value of the driving shaft;

The abrasion testing module is used for testing the driving shaft according to the torque loading value, the loading time and the rotating speed loading value after the driving shaft is installed, so as to obtain the abrasion depth of a three-column groove shell connected with the sliding joint in the driving shaft;

And the wear verification qualification module is used for judging the verification result of the three-column groove shell according to the wear depth of the three-column groove shell.

9. The utility model provides a drive shaft three post cell-shell wear test device which characterized in that, drive shaft three post cell-shell wear test device includes: memory, a processor and a drive shaft three-post housing wear verification program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the drive shaft three-post housing wear verification method of any one of claims 1-7.

10. A computer readable storage medium, characterized in that the computer readable storage medium stores a driveshaft three-column casing wear verification program, which when executed by a processor, implements the steps of the driveshaft three-column casing wear verification method according to any one of claims 1-7.