CN110907199A - Impact durability test bed and bench test method for differential lock between wheels of drive axle - Google Patents

Impact durability test bed and bench test method for differential lock between wheels of drive axle Download PDF

Info

Publication number
CN110907199A
CN110907199A CN201911401238.4A CN201911401238A CN110907199A CN 110907199 A CN110907199 A CN 110907199A CN 201911401238 A CN201911401238 A CN 201911401238A CN 110907199 A CN110907199 A CN 110907199A
Authority
CN
China
Prior art keywords
test
torque
inertia disc
impact
drive axle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201911401238.4A
Other languages
Chinese (zh)
Other versions
CN110907199B (en
Inventor
袁立国
李士杰
袁照丹
赵文华
金光
李凯
保万全
范春利
黄晶晶
徐伟健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FAW Jiefang Automotive Co Ltd
Original Assignee
FAW Jiefang Automotive Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FAW Jiefang Automotive Co Ltd filed Critical FAW Jiefang Automotive Co Ltd
Priority to CN201911401238.4A priority Critical patent/CN110907199B/en
Publication of CN110907199A publication Critical patent/CN110907199A/en
Application granted granted Critical
Publication of CN110907199B publication Critical patent/CN110907199B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00Testing of vehicles
    • G01M17/007Wheeled or endless-tracked vehicles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

Abstract

The invention relates to a drive axle inter-wheel differential lock impact endurance test stand and a bench test method, comprising a drive motor connected with a drive motor disengaging clutch; the inertia disc support is fixed on the rear bearing seat, the idle inertia disc in the inertia disc set is sleeved on the inertia disc support, the axial positioning device is sleeved on the inertia disc shaft and abuts against the inertia disc in the direction of the front bearing seat, the pressure plate of the driving motor disengaging clutch is fixed on the inertia disc shaft, and the inertia disc set is sleeved on the inertia disc shaft and connected with the inertia disc shaft through a spline; the test-accompanying clutch is fixedly connected to the inertia disc shaft, and the supporting unit is fixedly connected with the base; the input end of the torque measurement system is located at the input end of the drive axle, the angle measurement system is located at the input end of the drive axle, the output end of the drive axle assembly is connected with a hub tool, the hub tool is connected with a wheel-side transmission shaft, a wheel-side transmission shaft torque sensor is connected, and the torque sensor is connected with the magnetic powder brake. The method has the advantages of stable and controllable test conditions, low test cost, short test period and the like.

Description

Impact durability test bed and bench test method for differential lock between wheels of drive axle
Technical Field
The invention belongs to the field of automobile bench tests, and particularly relates to an impact endurance test bench and a bench test method for a differential lock between wheels of an automobile drive axle.
Technical Field
The driver usually selects to use the inter-wheel differential lock to start and get rid of the trouble on the road surface with large difference of the adhesion conditions of the tires on the two sides of the vehicle. At the moment, the vehicle is in a low gear, after the differential lock between wheels is locked, the clutch should be combined slowly theoretically, a driver tends to increase the accelerator to increase the rotating speed of the engine, the clutch is combined rapidly, the misuse of a vehicle transmission system is caused, and a large impact torque is generated on the differential lock assembly between the wheels. Under the influence of driving habits and vehicle working conditions, when the inter-wheel differential lock works, the movable gear sleeve and the fixed gear sleeve are not completely meshed, and the stress condition of the inter-wheel differential lock assembly is further worsened. According to the system dynamics analysis, the torque born by the components of the inter-wheel differential lock is alternating impact torque, belongs to the category of fatigue damage, and has larger damage to the differential lock component.
At present, a whole vehicle test is the only method for performing the durability test of the differential lock between the wheels, but has the disadvantages of long whole vehicle preparation time, poor test condition consistency, long test period, high cost and the like, so the whole vehicle test is not suitable for large-scale popularization and application, and a new test method needs to be searched.
Disclosure of Invention
The invention aims to provide an impact endurance test bed and a bench test method for a differential lock between wheels of an automobile drive axle.
The purpose of the invention is realized by the following technical scheme:
a test stand and a bench test method for impact durability of a differential lock between wheels of a drive axle comprise
The device comprises a base 1, wherein a driving motor system, an inertia disc system, an accompanying and testing system, a measuring system, a sample constraint system and a load unit are arranged on the base;
the driving motor system comprises a driving motor 2 and a driving motor disengaging clutch 3, the driving motor 2 is fixed on the base 1 through a motor support, and an output shaft of the driving motor is connected with a driven disc of the driving motor disengaging clutch 3;
the inertia disc system comprises an inertia disc set 6, an axial positioning device 7, an inertia disc bracket 8, a front bearing seat 5, an inertia disc shaft 4 and a rear bearing seat 9; two ends of an inertia disc shaft 4 are supported on a base through a front bearing seat 5 and a rear bearing seat 9, an inertia disc support 8 is fixed on the rear bearing seat 9, an idle inertia disc in an inertia disc set 6 is sleeved on the inertia disc support 8, an axial positioning device 7 is sleeved on the inertia disc shaft 4 and abuts against the inertia disc in the direction of the front bearing seat 5, a pressure plate of a driving motor disengaging clutch 3 is fixed on the inertia disc shaft 4, and the inertia disc set 6 is sleeved on the inertia disc shaft 4 and is in spline connection;
the accompanying test system comprises an accompanying test clutch 10, a transmission assembly 12 and a front transmission shaft 13, wherein a pressure plate of the accompanying test clutch 10 is fixedly connected to an inertia plate shaft 4, the accompanying test clutch 10, the transmission assembly 12 and the front transmission shaft 13 adopt a whole vehicle arrangement form, the shells of the transmission assembly 12 and the accompanying test clutch 10 are connected with a supporting unit 11, and the supporting unit 11 is fixedly connected with the base 1; the output end of the transmission assembly 12 is connected with the input end of the front transmission shaft 13;
the measuring system comprises a torque measuring system and an angle measuring system, wherein the input end of the torque measuring system is positioned at the input end of the drive axle and consists of an input torque sensor 19 and a third bearing seat 15, and the output end of the front transmission shaft 13 is connected with an input flange of the third bearing seat 15; the output end of the third bearing seat 15 is fixedly connected; the angle measuring system is positioned at the input end of the drive axle, consists of a toothed belt wheel 17, a toothed belt 16, an encoder and the like and is responsible for measuring an input swing angle; the toothed belt wheel 17 is connected with a driving corner sensor 18 through a toothed belt 16, and the corner sensor 18 is connected with the third bearing seat 15; the output end of the torque measuring system is respectively positioned at the wheel ends at the two sides of the drive axle, consists of a left torque sensor 22 and a right torque sensor 32 which are fixed on a magnetic powder brake bracket and are responsible for measuring a torque value, the output end of a third bearing seat 15 is connected with a rear drive shaft 20, the output end of the rear drive shaft 20 is connected with an input flange of a drive axle assembly 26 to be tested, and the input flange of the drive axle assembly 26 is fixedly connected with a sample constraint system;
the load unit comprises two hub tools 24, two torque sensors 22 on the left and right, two wheel-side transmission shafts 27 on the left and right, and two magnetic powder brakes 21 on the left and right, the output end of the drive axle assembly is connected with the hub tools 24, the hub tools 24 are connected with the wheel-side transmission shafts 27, the wheel-side transmission shafts 27 are connected with the torque sensors 22, and the torque sensors 22 are connected with the magnetic powder brakes 21.
As a more preferable technical scheme of the invention, the magnetic powder brake device further comprises a lubricating system, wherein the lubricating system comprises a lubricating motor, a lubricating oil pump 28, a radiator 29 and a lubricating pipeline 30, the lubricating oil pump 28 is connected with a drive axle assembly to be tested through the lubricating pipeline 30, and the radiator 29 is installed on a bracket of the magnetic powder brake 21.
As a better technical scheme of the invention, the device also comprises a compressed air system 31, and the compressed air system is connected with the test accompanying clutch 10, the driving motor disengaging clutch 3 and the inter-wheel differential lock through pipelines.
As a better technical scheme, the intelligent control system also comprises an electrical system, wherein the electrical system comprises an industrial personal computer, a power distribution cabinet, an electrical cabinet, a data acquisition card, a PLC, a relay, other accessories and the like.
As a more preferable technical scheme of the present invention, the base 1 is provided with a plurality of T-shaped grooves parallel to each other.
The invention also provides a test method based on the test bed, which comprises the following two steps: a target rotating speed self-learning stage and an automatic continuous operation stage;
step one, target rotating speed self-learning stage:
determining a functional relation between the rotating speed increment and the torque increment through a target rotating speed self-learning stage, and setting the following parameters: the method comprises the following steps of (1) obtaining a target rotating speed initial value, self-learning upper limit, wherein the upper limit is less than or equal to 10 times, rotating speed increment between two times of learning tests, and deviation between impact torque of a last impact test and the target impact torque, wherein the deviation is a difference value between a larger value of torque peak values of two wheel ends and a target torque value; when the difference value between the larger value of the torque peak values at the two wheel ends and the target torque value is within the deviation, the target self-learning test stage is ended, and in the target rotating speed self-learning stage, the impact times within the allowable range of test errors are counted in the sample impact endurance test result;
step two, automatic continuous operation stage
After the self-learning stage in the step one is finished, the test enters an automatic continuous durable impact test process, the target rotating speed is a numerical value obtained in the target self-learning stage, and in the subsequent test, the control system can correct the target rotating speed according to the change condition of the impact torque peak value and the function relationship between the rotating speed increment and the torque increment determined in the self-learning stage; in the automatic continuous operation stage, a circulation subprogram of an impact torque peak value and a slip torque is required to be compiled according to the use working condition of the finished automobile differential lock and load data, the program comprises a plurality of single impact tests, the impact torque peak value and the slip torque of each single impact test can be different, negative values can appear, namely the situation that the direction of the driving force of the automobile is the same as the direction of backing the automobile, the circulation subprogram is repeatedly operated until a sample fails, and the impact times are recorded, namely the impact endurance test result.
Has the following advantages and beneficial effects:
the invention is used for testing the impact endurance life of the differential lock between the wheels of the drive axle, and the analog quantity of the invention is as follows: the method comprises the steps of rotating inertia of a power assembly of an actual vehicle, the output rotating speed of an engine, a clutch combination process, misuse of a driver when the driver is in danger of getting out of trouble, gears of a transmission, road surface adhesion conditions, adhesion differences of left and right wheels (including extreme working conditions that one side of the wheel is seriously overloaded and the other side of the wheel slips), an inter-wheel differential lock engagement process (including engagement and low-speed starting engagement during normal running of the vehicle) and the like. The method is favorable for deeply excavating the root cause of the failure of the inter-wheel differential lock in the market, provides direction guidance for improving the design of the differential lock, improves the objectivity of the evaluation of the inter-wheel differential lock, and perfects the evaluation system of the bench test of the drive axle assembly.
Drawings
FIG. 1 is a schematic structural diagram of an impact endurance test bed of a differential lock between wheels of a drive axle according to the present invention;
FIG. 2 is a control schematic diagram of the impact durability test bed of the differential lock between the wheels of the drive axle of the present invention;
in the figure: 1-a base; 2-driving the motor; 3-driving the motor to disengage the clutch; 4-an inertia disc shaft; 5-front bearing seat; 6-inertia disc set; 7-axial positioning means; 8-inertia disc support; 9-rear bearing seat; 10-test-accompanying clutch; 11-a support unit; 12-a transmission assembly; 13-front transmission shaft; 14-an electrical system; 15-a third bearing seat; 16-toothed belts; 17-a toothed pulley; 18-rotation angle sensor; 19-an input torque sensor; 20-a rear drive shaft; 21-left magnetic powder brake; 22-left torque sensor; 23-left wheel side transmission shaft; 24-hub tooling; 25-a sample restraint system; 26-a sample to be tested; 27-right wheel-side transmission shaft; 28-a lubricating oil pump; 29-a heat exchanger; 30-lubricating oil pipeline; 31-pneumatic system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in figure 1, the invention provides a drive axle inter-wheel differential lock impact durability test bed and a bench test method, which comprise a base 1, wherein a drive motor system, an inertia disc system, an accompanying test system, a measuring system, a sample constraint system and a load unit are arranged on the base.
The driving motor system comprises a driving motor 2 and a driving motor disengaging clutch 3, the driving motor 2 is fixed on the base 1 through a motor support, and an output shaft of the driving motor is connected with a driven disc of the driving motor disengaging clutch 3; the driving motor 2 is a power source of the test bed and drives the inertia disc system to reach a target rotating speed; the motor support is used for installing and adjusting the position of the motor. The drive motor disconnect clutch 3 is responsible for disconnecting the drive motor system and the inertia disc system before the shock oscillation process occurs.
The inertia disc system comprises an inertia disc set 6, an axial positioning device 7, an inertia disc bracket 8, a front bearing seat 5, an inertia disc shaft 4 and a rear bearing seat 9; two ends of an inertia disc shaft 4 are supported on a base through a front bearing seat 5 and a rear bearing seat 9, an inertia disc support 8 is fixed on the rear bearing seat 9, an idle inertia disc in an inertia disc set 6 is sleeved on the inertia disc support 8, an axial positioning device 7 is sleeved on the inertia disc shaft 4 and abuts against the inertia disc in the direction of the front bearing seat 5, a pressure plate of a driving motor disengaging clutch 3 is fixed on the inertia disc shaft 4, and the inertia disc set 6 is sleeved on the inertia disc shaft 4 and is in spline connection; the inertia disc set consists of 4 inertia discs with different inertias, a proper inertia disc or inertia disc set 4 is selected according to test requirements, and the inertia discs which do not participate in working are fixed on an inertia disc support 8 through an axial positioning device. The axial positioning means 7 effect a positioning of the inertia disc in the axial direction. The inertia disc bracket 8 is fixed on the rear bearing block 9, and inertia discs which do not participate in the work are all carried by the inertia disc bracket. The front and the rear bearing blocks play the role of bearing a shaft system.
The accompanying test system comprises an accompanying test clutch 10, a transmission assembly 12 and a front transmission shaft 13, wherein a pressure plate of the accompanying test clutch 10 is fixedly connected to an inertia plate shaft 4, the accompanying test clutch 10, the transmission assembly 12 and the front transmission shaft 13 adopt a whole vehicle arrangement form, the shells of the transmission assembly 12 and the accompanying test clutch 10 are connected with a supporting unit 11, and the supporting unit 11 is fixedly connected with the base 1; the output end of the transmission assembly 12 is connected with the input end of the front transmission shaft 13; the test accompanying system is an important component of the load during the simulation test; the support unit 11 carries the clutch and transmission assembly.
The measuring system comprises a torque measuring system and an angle measuring system, wherein the input end of the torque measuring system is positioned at the input end of the drive axle and consists of an input torque sensor 19 and a third bearing seat 15, and the output end of the front transmission shaft 13 is connected with an input flange of the third bearing seat 15; the output end of the third bearing seat 15 is fixedly connected; the angle measuring system is positioned at the input end of the drive axle, consists of a toothed belt wheel 17, a toothed belt 16, an encoder and the like and is responsible for measuring an input swing angle; the toothed belt wheel 17 is connected with a driving corner sensor 18 through a toothed belt 16, and the corner sensor 18 is connected with the third bearing seat 15; the output end of the torque measuring system is respectively positioned at the wheel ends at the two sides of the drive axle, consists of a left torque sensor 22 and a right torque sensor 32 which are fixed on a magnetic powder brake bracket and are responsible for measuring a torque value, the output end of a third bearing seat 15 is connected with a rear drive shaft 20, the output end of the rear drive shaft 20 is connected with an input flange of a drive axle assembly 26 to be tested, and the input flange of the drive axle assembly 26 is fixedly connected with a sample constraint system;
the load unit comprises two hub tools 24, two torque sensors 22 on the left and right, two wheel-side transmission shafts 27 on the left and right, and two magnetic powder brakes 21 on the left and right, the output end of the drive axle assembly is connected with the hub tools 24, the hub tools 24 are connected with the wheel-side transmission shafts 27, the wheel-side transmission shafts 27 are connected with the torque sensors 22, and the torque sensors 22 are connected with the magnetic powder brakes 21. The hub tool 24 and the hub transmission shaft 27 are responsible for connecting the tested sample and the magnetic powder brake 21. The magnetic powder brake 21 is responsible for providing a load and is a key assembly of an analog load at the output end.
The lubricating system comprises a lubricating motor, a lubricating oil pump 28, a radiator 29 and a lubricating pipeline 30, wherein the lubricating oil pump 28 is connected with the drive axle assembly to be tested through the lubricating pipeline 30, and the radiator 29 is installed on the magnetic powder brake 21 support. The lubricating system is mainly used for lubricating and radiating the bearing of the tested piece.
The compressed air system is connected with the accompanying clutch 10, the driving motor disengaging clutch 3 and the inter-wheel differential lock through pipelines. The compressed air system mainly provides drive for a clutch, a driving motor disengaging clutch and an inter-wheel differential lock of the accompanying and testing system.
The electric system comprises an industrial personal computer, a power distribution cabinet, an electric appliance cabinet, a data acquisition card, a PLC, a relay and other accessories and the like, is the basis of the operation of the test bed, the control system of the test bed reads the input conditions of test programs, the PC and the PLC are communicated with each other, commands are transmitted to each execution unit of the test bed, the requirement of each step in the test process of the test bed is completed, relevant data are measured, acquired, processed and stored simultaneously, the single test and even the endurance test process of samples are completed, and the control principle is as shown in figure 2.
The sample restraint system 25 comprises an input end restraint mechanism and a wheel end restraint mechanism, and is a key condition for normal operation of the test bed, and the reasonable restraint system can ensure that test data in the impact test can reach a target value and keep stable. A restraint system of the inter-wheel differential lock impact test relates to the fitting degree of a bench test and the whole vehicle impact working condition, and directly influences the stability of a single impact test. The single drive axle vehicle is subjected to simulation constraint at a steel plate spring support; a vehicle with a middle drive axle and a rear drive axle of a balanced suspension is adopted to carry out simulation constraint on an I-rod support and a V-rod support. If the position is not well restrained, the restraint can be carried out at the brake bottom plate of the drive axle. All drive axle input flange bearing seat positions require appropriate constraints that are unique to the impact bench test. The axle restraint system is designed to meet the specified axle input flange axis coaxiality requirement with the transmission output flange axis.
The analog quantity of the test bed comprises the following components: the method comprises the steps of rotating inertia of a power assembly of an actual vehicle, the output rotating speed of an engine, a clutch combination process, misuse of a driver when the driver is in danger of getting out of trouble, gears of a transmission, road surface adhesion conditions, adhesion differences of left and right wheels (including extreme working conditions that one side of the wheel is seriously overloaded and the other side of the wheel slips), an inter-wheel differential lock engagement process (including engagement and low-speed starting engagement during normal running of the vehicle) and the like.
The following examples of the test stand operating procedure and control principle refer to the nomenclature given in table 1.
TABLE 1
Figure BDA0002347505660000071
An output shaft of a driving motor 2 of the test bed is matched with a driven plate of a driving motor release clutch 3, a pressure plate of the driving motor release clutch 3 is fixed on an inertia plate shaft 4, the front and the back of the inertia plate shaft 4 are respectively restrained by a front bearing seat 5 and a back bearing seat 9, an inertia plate group 6 is provided with four inertia plates with different inertia, the inertia plates are matched with an external spline of the inertia plate shaft through an internal spline, the inertia plate close to the front bearing seat 5 is restrained by an axial positioning device 7 on the inertia plate shaft 4 and can not move axially, when the rest three inertia plates are not used, the inertia plates can move axially on an inertia plate support 8, the internal spline of the unused inertia plate is sleeved on the inertia plate support 8 in an empty mode, and the inertia plate is axially fixed on the inertia plate support 8 through a clamping ring. A pressure plate of a clutch 10 of a transmission assembly is fixed on an inertia plate shaft 4, a driven plate of the clutch 10 is matched with an input shaft of a transmission 12, a clutch shell of the transmission assembly 12 is connected with a supporting unit 11, an output end of the transmission assembly 12 is connected with an input end of a front transmission shaft 13, an output end of the front transmission shaft 13 is connected with an input flange of a bearing seat 15, an output end of the bearing seat 15 is provided with a toothed belt wheel 17, the toothed belt wheel 17 drives an angle sensor 18 through a toothed belt 16, and the angle sensor 18 measures the change condition of a swing angle of an input end of a drive axle in the process of impact oscillation. The output end of the bearing block 15 is coupled to the input end of the rear drive shaft 20, and the output end of the rear drive shaft 20 is coupled to the input flange of the sample 25 (drive axle assembly). The drive axle assembly input flange end is fixedly coupled by the sample restraint system 25.
In the process of the impact test of the differential lock, the inertia force of the system is input by an input flange of the drive axle assembly and then is transmitted to the corresponding hub tooling 24 by the left and right hubs, and the left and right hub tooling is connected with the left and right transmission shafts 23 and 27. Taking the left wheel end of the drive axle as an example, the left transmission shaft 23 transmits the torque to the left torque sensor 22 connected with the left transmission shaft, the left torque sensor transmits the torque to the left magnetic powder brake 21, the right wheel end and the left side of the drive axle are of symmetrical structures, the structure and the transmission route of the torque are the same, and the description is omitted. The test bench starts a control program, the lubricating oil pump 28 starts to lubricate the driving axle driving and driven gear meshing area and the bearing in the main speed reducer, and the oil heated in the test returns to the test sample through the lubricating pipeline 30 after passing through the radiator 29. The test pneumatic system 31 controls the drive motor disengaging clutch, the clutch 10 of the transmission assembly 12 and the fork shaft of the differential lock according to the requirements of the system, and is part of the test control system.
The test method comprises the following two steps: a target rotating speed self-learning stage and an automatic continuous operation stage;
step one, target rotating speed self-learning stage:
determining a functional relation through a target rotating speed self-learning stage, and setting the following parameters: the method comprises the following steps of (1) obtaining a target rotating speed initial value, self-learning upper limit, wherein the upper limit is less than or equal to 10 times, rotating speed increment between two times of learning tests, and deviation between impact torque of a last impact test and the target impact torque, wherein the deviation is a difference value between a larger value of torque peak values of two wheel ends and a target torque value; when the difference value between the larger value of the torque peak values at the two wheel ends and the target torque value is within the deviation, the target self-learning test stage is ended, and in the target rotating speed self-learning stage, the impact times within the allowable range of test errors are counted in the sample impact endurance test result;
step two, automatic continuous operation stage
After the self-learning stage in the step one is finished, the test enters an automatic continuous durable impact test process, the target rotating speed is a numerical value obtained in the target self-learning stage, and in the subsequent test, the control system can correct the target rotating speed according to the change condition of the impact torque peak value and the function relationship between the rotating speed increment and the torque increment determined in the self-learning stage; in the automatic continuous operation stage, a circulation subprogram of an impact torque peak value and a slip torque is required to be compiled according to the use working condition of the finished automobile differential lock and load data, the program comprises a plurality of single impact tests, the impact torque peak value and the slip torque of each single impact test can be different, negative values can appear, namely the situation that the direction of the driving force of the automobile is the same as the direction of backing the automobile, the circulation subprogram is repeatedly operated until a sample fails, and the impact times are recorded, namely the impact endurance test result.
Example 1
Firstly, controlling software parameter setting and sample information input
After starting the control software, sample parameters and test parameters need to be set, and the sample parameters include: the speed ratio of the drive axle, the rated output torque of the drive axle, the distribution position of the differential lock, the driving mode of the shifting fork shaft and the like. The test parameters include: target rotation speed, impact torque peak value, angle protection value and the like.
And secondly, starting the test, namely starting a motor of the lubricating system by the control system to drive the oil pump to perform continuous forced lubrication on the key position of the sample to be tested. And (3) disconnecting the clutch gas supply system, namely, engaging the clutch, driving the inertia disc set to rotate at a rising speed by the driving motor, simultaneously keeping the ventilation state of the clutch in the test accompanying system, namely, the clutch is in a disconnection state, and simultaneously controlling the system to supply gas to the inter-wheel differential lock. When the driving motor and the inertia disc set reach the target rotating speed, the control system supplies air to the driving motor disengaging clutch, the clutch is disengaged, the driving motor and the inertia disc set are separated, meanwhile, the transmission clutch is disconnected, the clutch is rapidly combined, the inertia disc set with high rotating speed, the transmission and the transmission shaft generate impact torque on the driving axle and a load unit thereof, then oscillation is attenuated to stop the system, the air supply system recovers the initial state, namely, the clutch is disengaged and disconnected, the test-accompanying clutch is ventilated, the differential lock between the wheels of the tested sample is disconnected, the lubricating motor stops working, and the single impact test is finished. In the whole impact process, the data acquisition system records the value change of three torque sensors at the input end and the two wheel ends and the value change of the angle sensor at the input end, and stores the data in a database file.
Before a formal loading program is compiled, the corresponding relation between the impact torque peak value and the target rotating speed which is obtained in the self-learning stage is needed, and the use condition and the load spectrum of the finished automobile differential lock are referred as the basis, so that the modes of the impact torque peak value, the slip torque, the automobile driving direction and the load circulation are determined.
The test bed measures the torque value of an input end, the output torque of the magnetic powder brakes on the left side and the right side in real time and the input swing angle in the impact oscillation process, a protection value is set for the swing angle in a test program, the swing angle of each test can be taken to be compared with the protection value, when the swing angle exceeds the protection range, the test bed automatically stops the test, and a tester is prompted to check the state of a sample; in the continuous test process, if the torque signal is abnormal (lost, overlarge fluctuation and the like), the test is stopped, the sample is inspected, if the conditions of cracks, breakage and the like are determined, the sample is judged to be invalid, and the test is stopped.

Claims (6)

1. A drive axle inter-wheel differential lock impact endurance test stand and a bench test method are characterized in that: comprises that
The device comprises a base 1, wherein a driving motor system, an inertia disc system, an accompanying and testing system, a measuring system, a sample constraint system and a load unit are arranged on the base;
the driving motor system comprises a driving motor 2 and a driving motor disengaging clutch 3, the driving motor 2 is fixed on the base 1 through a motor support, and an output shaft of the driving motor is connected with a driven disc of the driving motor disengaging clutch 3;
the inertia disc system comprises an inertia disc set 6, an axial positioning device 7, an inertia disc bracket 8, a front bearing seat 5, an inertia disc shaft 4 and a rear bearing seat 9; two ends of an inertia disc shaft 4 are supported on a base through a front bearing seat 5 and a rear bearing seat 9, an inertia disc support 8 is fixed on the rear bearing seat 9, an idle inertia disc in an inertia disc set 6 is sleeved on the inertia disc support 8, an axial positioning device 7 is sleeved on the inertia disc shaft 4 and abuts against the inertia disc in the direction of the front bearing seat 5, a pressure plate of a driving motor disengaging clutch 3 is fixed on the inertia disc shaft 4, and the inertia disc set 6 is sleeved on the inertia disc shaft 4 and is in spline connection;
the accompanying test system comprises an accompanying test clutch 10, a transmission assembly 12 and a front transmission shaft 13, wherein a pressure plate of the accompanying test clutch 10 is fixedly connected to an inertia plate shaft 4, the accompanying test clutch 10, the transmission assembly 12 and the front transmission shaft 13 adopt a whole vehicle arrangement form, the shells of the transmission assembly 12 and the accompanying test clutch 10 are connected with a supporting unit 11, and the supporting unit 11 is fixedly connected with the base 1; the output end of the transmission assembly 12 is connected with the input end of the front transmission shaft 13;
the measuring system comprises a torque measuring system and an angle measuring system, wherein the input end of the torque measuring system is positioned at the input end of the drive axle and consists of an input torque sensor 19 and a third bearing seat 15, and the output end of the front transmission shaft 13 is connected with an input flange of the third bearing seat 15; the output end of the third bearing seat 15 is fixedly connected; the angle measuring system is positioned at the input end of the drive axle, consists of a toothed belt wheel 17, a toothed belt 16, an encoder and the like and is responsible for measuring an input swing angle; the toothed belt wheel 17 is connected with a driving corner sensor 18 through a toothed belt 16, and the corner sensor 18 is connected with the third bearing seat 15; the output end of the torque measuring system is respectively positioned at the wheel ends at the two sides of the drive axle, consists of a left torque sensor 22 and a right torque sensor 32 which are fixed on a magnetic powder brake bracket and are responsible for measuring a torque value, the output end of a third bearing seat 15 is connected with a rear drive shaft 20, the output end of the rear drive shaft 20 is connected with an input flange of a drive axle assembly 26 to be tested, and the input flange of the drive axle assembly 26 is fixedly connected with a sample constraint system;
the load unit comprises two hub tools 24, two torque sensors 22 on the left and right, two wheel-side transmission shafts 27 on the left and right, and two magnetic powder brakes 21 on the left and right, the output end of the drive axle assembly is connected with the hub tools 24, the hub tools 24 are connected with the wheel-side transmission shafts 27, the wheel-side transmission shafts 27 are connected with the torque sensors 22, and the torque sensors 22 are connected with the magnetic powder brakes 21.
2. The impact endurance test stand and bench test method of differential lock between wheels of drive axle according to claim 1, wherein: still include lubricating system, lubricating system including lubricated motor, lubricating oil pump 28, radiator 29 and lubrication pipe way 30, lubricating oil pump 28 be connected with the transaxle assembly that awaits measuring through lubrication pipe way 30, radiator 29 install on magnetic powder brake 21 support.
3. The impact endurance test stand and bench test method of differential lock between wheels of drive axle according to claim 1, wherein: the device further comprises a compressed air system 31, and the compressed air system is connected with the accompanying clutch 10, the driving motor disengaging clutch 3 and the inter-wheel differential lock through pipelines.
4. The impact endurance test stand and bench test method of differential lock between wheels of drive axle according to claim 1, wherein: the intelligent power distribution system is characterized by further comprising an electrical system, wherein the electrical system comprises an industrial personal computer, a power distribution cabinet, an electrical cabinet, a data acquisition card, a PLC (programmable logic controller), a relay and other accessories and the like.
5. The impact endurance test stand and bench test method of differential lock between wheels of drive axle according to claim 1, wherein: the base 1 is provided with a plurality of T-shaped grooves which are parallel to each other.
6. A test method based on the test stand of claim 1, comprising the following two steps: a target rotating speed self-learning stage and an automatic continuous operation stage;
step one, target rotating speed self-learning stage:
determining a functional relation between the rotating speed increment and the torque increment through a target rotating speed self-learning stage, and setting the following parameters: the method comprises the following steps of (1) obtaining a target rotating speed initial value, self-learning upper limit, wherein the upper limit is less than or equal to 10 times, rotating speed increment between two times of learning tests, and deviation between impact torque of a last impact test and the target impact torque, wherein the deviation is a difference value between a larger value of torque peak values of two wheel ends and a target torque value; when the difference value between the larger value of the torque peak values at the two wheel ends and the target torque value is within the deviation, the target self-learning test stage is ended, and in the target rotating speed self-learning stage, the impact times within the allowable range of test errors are counted in the sample impact endurance test result;
step two, automatic continuous operation stage
After the self-learning stage in the step one is finished, the test enters an automatic continuous durable impact test process, the target rotating speed is a numerical value obtained in the target self-learning stage, and in the subsequent test, the control system can correct the target rotating speed according to the change condition of the impact torque peak value and the function relationship between the rotating speed increment and the torque increment determined in the self-learning stage; in the automatic continuous operation stage, a circulation subprogram of an impact torque peak value and a slip torque is required to be compiled according to the use working condition of the finished automobile differential lock and load data, the program comprises a plurality of single impact tests, the impact torque peak value and the slip torque of each single impact test can be different, negative values can appear, namely the situation that the direction of the driving force of the automobile is the same as the direction of backing the automobile, the circulation subprogram is repeatedly operated until a sample fails, and the impact times are recorded, namely the impact endurance test result.
CN201911401238.4A 2019-12-31 2019-12-31 Impact durability test bed and bench test method for differential lock between wheels of drive axle Active CN110907199B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911401238.4A CN110907199B (en) 2019-12-31 2019-12-31 Impact durability test bed and bench test method for differential lock between wheels of drive axle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911401238.4A CN110907199B (en) 2019-12-31 2019-12-31 Impact durability test bed and bench test method for differential lock between wheels of drive axle

Publications (2)

Publication Number Publication Date
CN110907199A true CN110907199A (en) 2020-03-24
CN110907199B CN110907199B (en) 2022-02-01

Family

ID=69814004

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911401238.4A Active CN110907199B (en) 2019-12-31 2019-12-31 Impact durability test bed and bench test method for differential lock between wheels of drive axle

Country Status (1)

Country Link
CN (1) CN110907199B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111855197A (en) * 2020-07-22 2020-10-30 武汉理工通宇新源动力有限公司 Test bed for testing electric drive axle assembly
CN112557027A (en) * 2020-12-02 2021-03-26 安乃达驱动技术(江苏)有限公司 Method for verifying reliability of motor clutch for power-assisted bicycle
CN112857828A (en) * 2021-01-14 2021-05-28 北京理工大学 Dual-independent vehicle transmission measurement and control system
CN113008554A (en) * 2021-04-25 2021-06-22 重庆理工大学 Impact endurance test method for new energy reducer
CN113008480A (en) * 2021-02-26 2021-06-22 一汽解放汽车有限公司 Comprehensive performance test device for differential lock control mechanism
CN113029535A (en) * 2021-02-26 2021-06-25 一汽解放汽车有限公司 Differential lock cylinder wear test device

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU101188U1 (en) * 2010-07-16 2011-01-10 Общество С Ограниченной Ответственностью "Копис" STAND FOR TESTING AND BREAKDOWN OF DRIVING BRIDGES OF VEHICLES (OPTIONS)
CN201903446U (en) * 2010-12-24 2011-07-20 邵春平 Endurance test stand for automobile transmission assembly
CN102331347A (en) * 2011-08-04 2012-01-25 诸城市义和车桥有限公司 Drive axle load test bench
JP4867523B2 (en) * 2006-08-17 2012-02-01 株式会社明電舎 Transaxle testing equipment
CN103852254A (en) * 2012-12-07 2014-06-11 上汽通用五菱汽车股份有限公司 Method for testing static torsion strength of automotive transmission system
CN204064651U (en) * 2014-08-13 2014-12-31 中国长安汽车集团股份有限公司四川建安车桥分公司 For the test unit that driving axis bevel gear meshing mark loads
CN105372032A (en) * 2015-11-30 2016-03-02 上汽通用五菱汽车股份有限公司 Device, system and method of vibration performance integration testing of transmission shaft and rear axle assembly
CN105841975A (en) * 2016-04-29 2016-08-10 中国第汽车股份有限公司 Pneumatic type mechanical differential lock functional rack test device
CN205607638U (en) * 2016-05-11 2016-09-28 余金榕 Drive axle assembly detection device that operates
CN205607653U (en) * 2016-05-12 2016-09-28 王丽琴 Bridge assembly bench test machine
CN106482957A (en) * 2016-12-15 2017-03-08 广西柳工机械股份有限公司 Drive axle immobilization test system
CN206020044U (en) * 2016-08-11 2017-03-15 中国第一汽车股份有限公司 A kind of driving axis lubricate bench test device
CN207976281U (en) * 2018-03-15 2018-10-16 重庆理工大学 A kind of drive axle entirety driving error test measurement device

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4867523B2 (en) * 2006-08-17 2012-02-01 株式会社明電舎 Transaxle testing equipment
RU101188U1 (en) * 2010-07-16 2011-01-10 Общество С Ограниченной Ответственностью "Копис" STAND FOR TESTING AND BREAKDOWN OF DRIVING BRIDGES OF VEHICLES (OPTIONS)
CN201903446U (en) * 2010-12-24 2011-07-20 邵春平 Endurance test stand for automobile transmission assembly
CN102331347A (en) * 2011-08-04 2012-01-25 诸城市义和车桥有限公司 Drive axle load test bench
CN103852254A (en) * 2012-12-07 2014-06-11 上汽通用五菱汽车股份有限公司 Method for testing static torsion strength of automotive transmission system
CN204064651U (en) * 2014-08-13 2014-12-31 中国长安汽车集团股份有限公司四川建安车桥分公司 For the test unit that driving axis bevel gear meshing mark loads
CN105372032A (en) * 2015-11-30 2016-03-02 上汽通用五菱汽车股份有限公司 Device, system and method of vibration performance integration testing of transmission shaft and rear axle assembly
CN105841975A (en) * 2016-04-29 2016-08-10 中国第汽车股份有限公司 Pneumatic type mechanical differential lock functional rack test device
CN205607638U (en) * 2016-05-11 2016-09-28 余金榕 Drive axle assembly detection device that operates
CN205607653U (en) * 2016-05-12 2016-09-28 王丽琴 Bridge assembly bench test machine
CN206020044U (en) * 2016-08-11 2017-03-15 中国第一汽车股份有限公司 A kind of driving axis lubricate bench test device
CN106482957A (en) * 2016-12-15 2017-03-08 广西柳工机械股份有限公司 Drive axle immobilization test system
CN207976281U (en) * 2018-03-15 2018-10-16 重庆理工大学 A kind of drive axle entirety driving error test measurement device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
袁立国: "汽车传动系冲击耐久试验台开发的关键技术", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111855197A (en) * 2020-07-22 2020-10-30 武汉理工通宇新源动力有限公司 Test bed for testing electric drive axle assembly
CN112557027A (en) * 2020-12-02 2021-03-26 安乃达驱动技术(江苏)有限公司 Method for verifying reliability of motor clutch for power-assisted bicycle
CN112857828A (en) * 2021-01-14 2021-05-28 北京理工大学 Dual-independent vehicle transmission measurement and control system
CN113008480A (en) * 2021-02-26 2021-06-22 一汽解放汽车有限公司 Comprehensive performance test device for differential lock control mechanism
CN113029535A (en) * 2021-02-26 2021-06-25 一汽解放汽车有限公司 Differential lock cylinder wear test device
CN113008480B (en) * 2021-02-26 2022-09-20 一汽解放汽车有限公司 Comprehensive performance test device for differential lock control mechanism
CN113008554A (en) * 2021-04-25 2021-06-22 重庆理工大学 Impact endurance test method for new energy reducer
CN113008554B (en) * 2021-04-25 2023-11-21 重庆理工大学 Impact durability test method for new energy reducer

Also Published As

Publication number Publication date
CN110907199B (en) 2022-02-01

Similar Documents

Publication Publication Date Title
CN110907199B (en) Impact durability test bed and bench test method for differential lock between wheels of drive axle
US7530263B2 (en) Vehicle parasitic loss and drive line efficiency test fixture and method
CN102706558B (en) Test platform for testing automatic gearbox
CN103528815B (en) Drive axle test method and system
EP2505441B1 (en) Measuring brake wear
CN110530634B (en) Test bed system for vehicle wet-type double-clutch automatic transmission
CN209783899U (en) wet-type double clutch assembly comprehensive properties test equipment
CN104034529A (en) Dustproof performance simulation test machine for automobile hub bearing unit
Jaśkiewicz et al. Facility for performance testing of power transmission units
CN108362495A (en) Wet type double-clutch automatic gearbox churning loss measures tooling and measurement method
WO2017155446A1 (en) Measuring Device for Assessing a Torque Parameter of a Vehicle and Method for Assessing a Torque Parameter of a Vehicle
CN209689919U (en) One kind being used for new-energy automobile Synchromous device of gearbox endurance test rack
CN207675447U (en) A kind of braking automobile device for detecting performance
CN114609520A (en) Dual-motor electric drive bridge durability test system and test method
CN114755028A (en) Test bed for reliability and durability of whole vehicle, control method and medium
CN201974345U (en) Friction property test flume
CN114072653A (en) Heavy engine adjustment test device and method
CN114063607B (en) Automotive AMT clutch in-loop test bench and test method thereof
CN113049248A (en) Impact endurance test system and method for new energy reducer
Shih et al. Drivetrain noise and vibration troubleshooting
CN210113547U (en) Clutch facing chatter test bench for automobile
CN215865811U (en) A loading test platform for tractor drive train
CN116952568A (en) Dual clutch test method and system
CN218411677U (en) Wet brake inertia test bed for engineering machinery drive axle
Chen Research and Application of Test Bench Method for Jaw Type Electronic Differential Lock

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant