CN214373383U

CN214373383U - Fatigue test equipment for automobile chassis simulation road test

Info

Publication number: CN214373383U
Application number: CN202120664343.3U
Authority: CN
Inventors: 徐佐; 陈德胜; 刘强; 李世德; 刘春海; 王永雷
Original assignee: CITIC Dicastal Co Ltd
Current assignee: CITIC Dicastal Co Ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-10-08
Anticipated expiration: 2031-04-01

Abstract

The utility model belongs to the field of automobile chassis suspension system tests, and provides a fatigue test device for automobile chassis simulation road tests, wheels are fixed on a suspension assembly, and a loading system applies lateral load, vertical load, longitudinal load and driving torque to the wheels and the suspension system through a movable plate; the high-speed road surface rotary drum component can rotate at a high speed by the belt-driven wheels to simulate the high-speed road condition of a real vehicle; the impact road surface drum assembly can be adapted to the road conditions of a test run such as a speed bump, a pebble road and the like; the rotary drum switching assembly can enable wheels fixed on the suspension assembly to be switched between the high-speed road surface rotary drum assembly and the impact road surface rotary drum assembly, the fatigue test equipment can simultaneously test the simulated road test fatigue durability of the wheels, the suspension system and other automobile chassis parts, the test state of the tested wheels and the suspension system is close to the real automobile state, and the load borne by the automobile chassis in the actual road driving process is simulated and reproduced in a laboratory.

Description

Fatigue test equipment for automobile chassis simulation road test

Technical Field

The application relates to the field of automobile chassis suspension system tests, in particular to fatigue test equipment for an automobile chassis simulation road test.

Background

The fatigue durability road test of the whole automobile chassis belongs to the final link of automobile development, is usually carried out in a professional test yard, needs to use the whole automobile, has high working strength of test personnel, long period and high test cost, and can generate high development cost and serious progress loss once the failure of parts occurs, so that before the road test of the whole automobile, the reliability verification of the part level and the system level of the automobile chassis needs to be carried out in a laboratory.

In order to verify the fatigue durability of the wheel, radial fatigue, bending fatigue and biaxial fatigue tests simulating road tests are generally adopted in a laboratory for verification, but the bench tests only mount the wheel, the buffer action of a suspension on the load of the wheel is not considered, and the test result has certain deviation from the actual vehicle result. In order to verify the fatigue durability of the automobile chassis system, an axle coupling road simulation test of a quarter suspension system, a half vehicle or the whole chassis can be carried out in a laboratory, but the test is not provided with wheels, the axle head is loaded, the performance of the wheels cannot be inspected, the test has high requirements on iterative evaluation, patch measurement, data analysis and the like, and the test cost is also high.

SUMMERY OF THE UTILITY MODEL

In order to test the fatigue endurance performance of the simulation road test of automobile chassis parts such as wheel and suspension system simultaneously in a bench test, the utility model provides a fatigue test equipment for automobile chassis simulation road test can truly simulate automobile wheel and suspension system at the real car stress state in the test yard, tests the fatigue endurance performance of wheel and suspension system simultaneously.

In order to achieve the above object, the utility model provides a following technical scheme:

the embodiment of the utility model provides a fatigue test equipment for automobile chassis simulation road test, including suspension subassembly, loading system, highway surface rotary drum subassembly, assault road surface rotary drum subassembly and rotary drum switching module, the suspension subassembly is installed on the loading system, the suspension subassembly can be loaded on highway surface rotary drum subassembly and assault road surface rotary drum subassembly through the wheel; the drum switching assembly is capable of switching a wheel fixed to the suspension assembly between the high speed road drum assembly and the impact road drum assembly.

In some embodiments, the suspension assembly includes an adapter plate, a suspension mount, and a quarter suspension for mounting a wheel, the quarter suspension being secured to the suspension mount, the suspension mount being secured to the adapter plate. In the embodiment, the structure and the size of the suspension fixing frame can be changed to adapt to the suspensions of different vehicle types by changing the quarter suspension of different vehicle types, so that the experimental equipment has universal matching performance, wheels of various vehicle types and fatigue durability of a suspension system can be installed and tested, the development period of the whole vehicle is shortened, and the development cost is reduced.

In some embodiments, the loading system comprises a side load loading assembly, a vertical load loading assembly, a vehicle weight preload loading assembly, an inclination angle loading assembly, a driving torque loading assembly and a movable plate, wherein the side load loading assembly, the vertical load loading assembly, the vehicle weight preload loading assembly and the inclination angle loading assembly act on the movable plate, and the adapter plate is fixedly connected with the movable plate; the driving torque loading assembly acts on a transmission shaft of the quarter suspension to drive wheels to rotate. The loading system in the embodiment can realize the application of six-component load of the wheels through each loading component of the loading system, and better simulates the load borne by the automobile chassis in the actual road running process.

In some embodiments, the tilt angle loading assembly comprises a tilt angle body, a tilt angle base and a tilt angle electric cylinder, wherein the lower end of the tilt angle body is pivotally fixed on the tilt angle base, the bottom end of the tilt angle electric cylinder is movably connected to the tilt angle base, a piston rod of the tilt angle electric cylinder is movably connected to the tilt angle body, and the tilt angle body can be driven to rotate around a pivot shaft by the expansion and contraction of the piston rod of the tilt angle electric cylinder; the vehicle weight preload loading assembly comprises a preload motor, a first lead screw, a first sliding block and a preload arm, wherein the preload motor is fixed on the inclination angle machine body, an output shaft of the preload motor is fixedly connected with the first lead screw, a first threaded hole is formed in the first sliding block, an external thread of the first lead screw is matched with an internal thread of the first threaded hole, the first sliding block is fixed on the preload arm, and the preload motor can drive the first lead screw to rotate to realize the up-and-down movement of the preload arm; the lateral load loading assembly comprises a corner motor and a corner loading arm, a shell of the corner motor is connected with the corner loading arm, a rotating shaft of the corner motor is fixedly connected with the preloading arm, and the corner motor can drive the corner loading arm to rotate around the rotating shaft of the corner motor; the vertical load loading assembly comprises a hydraulic actuator, the hydraulic actuator is fixed at the upper end of the corner loading arm, the movable plate is vertically fixed on the corner loading arm, and a piston rod of the hydraulic actuator is connected with the upper end of the movable plate; the driving torque loading assembly comprises an accelerating torque driving shaft, an accelerating torque motor and a motor mounting table, wherein the accelerating torque motor is fixed on the motor mounting table, the output end of the accelerating torque motor is connected with the accelerating torque driving shaft, and the accelerating torque driving shaft is fixedly connected with a transmission shaft of the quarter suspension. The embodiment provides a specific structure of each loading assembly, the camber angle of a wheel is applied through the inclination angle loading assembly, the dead weight of a vehicle is applied through the vehicle weight preload loading assembly, the side load of the wheel and a suspension system is applied through the side load loading assembly, the vertical bump load is applied through the vertical load loading assembly, the vehicle driving acceleration torque is applied through the driving torque loading assembly, the test state of the tested wheel and the suspension system is ensured to be close to the real vehicle state, and the load borne by an automobile chassis in the actual road running process is simulated and reproduced in a laboratory.

In some embodiments, the preload arm and the corner loading arm are both L-shaped, the housing of the corner motor is fixed integrally with the horizontal portion of the corner loading arm, and the rotation shaft of the corner motor is fixed to the horizontal portion of the preload arm.

In some embodiments, the loading system further comprises a six-component load cell platform secured to the corner loading arm on one side and the movable plate on the other side.

In some embodiments, a second rail is fixedly disposed on the six-component force-measuring platform, a second slide block is disposed on the second rail, and the movable plate is fixed to the second slide block.

In some embodiments, the adapter plate and the movable plate are each provided with a plurality of rows of fixing holes.

In some embodiments, the high speed road surface drum assembly includes a first rotary drive assembly and a high speed drum, the first rotary drive assembly being capable of driving the high speed drum in rotation. In the embodiment, the first rotary driving component is used for realizing the rotation of the high-speed rotary drum so as to drive the wheels fixed on the suspension component to rotate, and the stress working conditions of the wheels and the suspension system are ensured to be consistent with the high-speed running state of the real vehicle.

In some embodiments, the first rotary driving assembly includes a high-speed motor, a gearbox, and a first motor base, the high-speed motor and the gearbox are both fixed on the first motor base, and an output end of the high-speed motor is connected to the central rotating shaft of the high-speed drum through the gearbox.

In some embodiments, the high-speed pavement drum assembly further includes a first drum base, a groove for placing the high-speed drum is formed in the middle of the first drum base, and a central rotating shaft of the high-speed drum is fixed on the first drum base through a bearing and a bearing seat.

In some embodiments, the impact drum assembly includes a second rotary drive assembly configured to drive rotation of the pebble pavement drum and the speed bump pavement drum, a pebble pavement drum, and a speed bump pavement drum. In this embodiment, the structures and the sizes of the speed bump and the pebble pavement on the impact pavement drum assembly are consistent with those of the test yard, so that the road condition of the test yard can be truly reproduced.

In some embodiments, the second rotary driving assembly includes a low-speed motor, a small belt pulley, a large belt pulley, a belt, and a second motor base, the low-speed motor is fixed on the second motor base, an output end of the low-speed motor is fixedly connected with the small belt pulley, the pebble pavement drum and the deceleration strip pavement drum are coaxially disposed, the large belt pulley is fixed on a central rotating shaft of the pebble pavement drum and the deceleration strip pavement drum, and the large belt pulley and the small belt pulley are connected through the belt.

In some embodiments, the impact pavement drum assembly further includes a second drum base, a groove for placing the pebble pavement drum and the speed bump pavement drum is formed in the middle of the second drum base, and central rotating shafts of the pebble pavement drum and the speed bump pavement drum are fixed on the second drum base through a bearing and a bearing seat.

In some embodiments, the drum switching assembly includes a horizontal sliding assembly and a mounting table, the horizontal sliding assembly can drive the mounting table to move horizontally, and the loading system is fixed on the mounting table.

In some embodiments, the horizontal sliding assembly includes a slider driving motor, a second lead screw, a third slider, a linear bearing, a third guide rail and a switching sliding table base, the third guide rail is fixed on the top surface of the switching sliding table base, the mounting table is connected with the third guide rail through the linear bearing, the slider driving motor and the second lead screw are all fixedly arranged on the switching sliding table base, the output end of the slider driving motor is fixedly connected with one end of the second lead screw, the third slider is fixedly connected with the mounting table, a second threaded hole is formed in the third slider, an external thread of the second lead screw is matched with an internal thread of the second threaded hole, and the slider driving motor can drive the second lead screw to rotate, so that the mounting table moves left and right.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a fatigue test equipment for automobile chassis simulation road test, including suspension subassembly, loading system, highway surface rotary drum subassembly, impact road surface rotary drum subassembly, rotary drum switching module, fixed wheel on the suspension subassembly, loading system applys side load, perpendicular jolt load, real car heavy load and loading inclination to the wheel through the movable plate to drive the wheel rotation, rotary drum switching module enables loading system and fix suspension subassembly on the loading system switches between highway surface rotary drum subassembly and impact road surface rotary drum subassembly, and this fatigue test equipment can test the tired endurance quality of simulation road test of automobile chassis spare such as wheel and suspension system simultaneously, has ensured that the experimental state of the wheel of test and suspension system is close to real car state, with the load that automobile chassis received at the actual road travel in-process reappear at the laboratory simulation, the fatigue endurance performance of the wheel and the suspension system can be tested simultaneously, the universal matching performance is realized, the fatigue endurance performance of the wheel and the suspension system of various vehicle types can be installed and tested, the development period of the whole vehicle is shortened, and the development cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a fatigue testing device for a simulated road test of an automobile chassis.

Fig. 2 is a schematic structural diagram of a suspension assembly of a fatigue testing device for a simulated road test of an automobile chassis.

Fig. 3 is a schematic structural diagram of a loading system of a fatigue testing device for a simulated road test of an automobile chassis according to the present application.

Fig. 4 is a partial structural schematic diagram of a loading system of a fatigue testing device for a simulated road test of an automobile chassis.

FIG. 5 is a schematic structural diagram of a high-speed pavement drum assembly of a fatigue testing apparatus for automobile chassis simulation road tests according to the present application.

FIG. 6 is a schematic structural diagram of an impact road drum assembly of a fatigue testing apparatus for automotive chassis simulation road tests according to the present application.

FIG. 7 is a schematic structural diagram of a drum switching assembly of a fatigue testing apparatus for a simulated road test of an automobile chassis.

Wherein: in the figure: 1-a suspension component, 2-a loading component, 3-a high-speed road surface rotary drum component, 4-an impact road surface rotary drum component and 5-a rotary drum switching component; 101-wheel, 102-quarter suspension, 103-suspension fixing frame, 104-adapter plate, 201-corner loading arm, 202-six-component force measuring platform, 203-movable plate, 204-high frequency response hydraulic cylinder, 205-corner motor, 206-four-point contact bearing, 207-preloading arm, 208-preloading motor, 209-tilt angle fuselage, 210-tilt angle base, 211-tilt angle electric cylinder, 212-acceleration torque driving shaft, 213-acceleration torque motor, 214-motor mounting platform, 301-high speed drum, 302-first central rotating shaft, 303-bearing seat, 304-first drum base, 305-gearbox, 306-high speed motor, 307-first motor base, 401-pebble road drum, 402-deceleration strip road drum, 403-a second central rotating shaft, 404-a bearing seat, 405-a rotary drum base, 406-a large belt pulley, 407-a small belt pulley, 408-a belt, 409-a low-speed motor, 410-a second motor base, 501-an installation table, 502-a second lead screw, 503-a slide block driving motor, 504-a linear bearing, 505-a third guide rail, 506-a switching slide table base and 507-a third slide block.

Detailed Description

The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example 1:

the embodiment 1 provides a fatigue test device for a simulated road test of an automobile chassis, which comprises a suspension assembly 1, a loading system 2, a high-speed road surface rotary drum assembly 3, an impact road surface rotary drum assembly 4 and a rotary drum switching assembly 5, as shown in fig. 1. The suspension assembly 1 is mounted on a loading system 2. The suspension assembly 1 can be loaded onto the high speed road drum assembly 3 and the impact road drum assembly 4 by means of wheels. The drum switching assembly 5 is capable of switching the loading system 2 and the suspension assembly 1 fixed to the loading system 2 between the high-speed road surface drum assembly 3 and the impact road surface drum assembly 4, i.e. the drum switching assembly 5 is capable of switching the wheels fixed to the suspension assembly 1 between the high-speed road surface drum assembly 3 and the impact road surface drum assembly 4.

As shown in fig. 2, the suspension assembly 1 includes an adapter plate 104, a suspension mount 103, and a quarter suspension 102 for mounting a wheel 101. The quarter suspension 102 is fixed to the suspension holder 103, and the suspension holder 103 is fixed to the adapter plate 104. The wheels 101 and the quarter suspension 102 are mounted on a suspension mount 103 in a real vehicle space layout, and the suspension mount 103 is mounted on an adapter plate 104 by bolts. And each bolt connection point is tightened and marked according to the required torque, so that whether the bolt or the nut is loosened reversely in the test process is conveniently checked.

As shown in fig. 3-4, the loading system 2 includes a side load loading assembly, a vertical load loading assembly, a truck weight preload loading assembly, a pitch angle loading assembly, a drive torque loading assembly, and a moving plate 203. The side load loading assembly, the vertical load loading assembly, the vehicle weight preload loading assembly and the inclination angle loading assembly act on the movable plate 203. The adapter plate 104 is fixedly connected with the movable plate 203, a plurality of rows of fixing holes are formed in the adapter plate 104 and the movable plate 203, and the adapter plate 104 is fixed on the movable plate 203 through bolts. The driving torque loading assembly acts on a transmission shaft of the quarter suspension 102 to drive the wheel 101 to rotate at an accelerated speed.

As shown in fig. 3, the tilt angle loading assembly includes a tilt angle body 209, a tilt angle base 210, and a tilt angle electric cylinder 211. The lower extreme of inclination fuselage 209 passes through bearing and pivot mechanism pivotable fastening and is in on the inclination base 210, the shell bottom of inclination electronic jar 211 is in through first fixed bolster and first round pin axle swing joint on the inclination base 210, and the piston rod of inclination electronic jar 211 passes through second fixed bolster and second round pin axle swing joint on the inclination fuselage 209, the flexible of the piston rod of inclination electronic jar 211 can drive inclination fuselage 209 rotates around the pivot axle to the inclination that realizes the suspension subassembly 1 of test is the same with real car.

The vehicle weight preload loading assembly comprises a preload motor 208, a first lead screw, a first slide block and a preload arm 207. The preloading motor 208 is fixed on the inclination angle machine body 209, an output shaft of the preloading motor 208 is fixedly connected with the first lead screw, a first threaded hole is formed in the first sliding block, an external thread of the first lead screw is matched with an internal thread of the first threaded hole, the first sliding block is fixed on the preloading arm 207, the preloading motor 208 can drive the first lead screw to rotate to realize the up-and-down movement of the preloading arm 207, and it is ensured that a preload equal to the weight of a real vehicle is applied to the tested suspension assembly 1 within a reasonable stroke range of the hydraulic actuator (high-frequency response hydraulic cylinder 204).

The side load loading assembly comprises a corner motor 205 and a corner loading arm 201, a shell of the corner motor 205 is connected with the corner loading arm 201, a rotating shaft of the corner motor 205 is fixedly connected with the pre-loading arm 207 through a four-point contact bearing 206, the corner motor 205 can drive the corner loading arm 201 to rotate around the rotating shaft of the corner motor 205, the working condition that a real vehicle turns on a road is simulated, and side load is applied to a tested wheel and a tested suspension system. The pre-loading arm 207 and the corner loading arm 201 are both L-shaped, a housing of the corner motor 205 is fixed with a horizontal portion of the corner loading arm 201 as a whole, and a rotating shaft of the corner motor 205 is fixed on the horizontal portion of the pre-loading arm 207.

The vertical load loading assembly comprises a hydraulic actuator, in this embodiment, a high-frequency response hydraulic cylinder 204 with the highest loading frequency of 60Hz is fixed at the upper end of the corner loading arm 201, the movable plate 203 is vertically fixed on the corner loading arm 201, a piston rod of the high-frequency response hydraulic cylinder 204 is connected with the upper end of the movable plate 203, and the high-frequency response hydraulic cylinder 204 plays a load spectrum signal set in advance to realize the application of a vertical bumping load of the wheel.

The driving torque loading assembly comprises an accelerating torque driving shaft 212, an accelerating torque motor 213 and a motor mounting platform 214, wherein the accelerating torque motor 213 is fixed on the motor mounting platform 214, the output end of the accelerating torque motor 213 is connected with the accelerating torque driving shaft 212, and the accelerating torque driving shaft 212 is fixedly connected with the transmission shaft of the quarter suspension 102. A torque sensor is further provided between the output of the acceleration torque motor 213 and the acceleration torque drive shaft 212 to measure and adjust the drive torque in real time. As shown in fig. 1 and 3, one end of the acceleration torque driving shaft 212 is connected to the transmission shaft of the quarter suspension 102, the other end is connected to the acceleration torque motor 213 through the torque sensor, the acceleration torque motor 213 is fixed on the motor mounting platform 214, and the acceleration torque motor 213 drives the wheels to accelerate and rotate through the acceleration torque driving shaft 212, so as to apply the acceleration driving torque to the real wheels.

The loading system 2 further comprises a six-component force-measuring platform 202, and the six-component force-measuring platform 202 is formed by combining four three-component sensors. The six-component force-measuring platform 202 is fixed to the corner loading arm 201 on one side and the movable plate 203 on the other side. A second guide rail is fixedly arranged on the six-component force-measuring platform 202, the second slide block is arranged on the second guide rail, and the movable plate 203 is fixed on the second slide block. As shown in fig. 4, the six-component force-measuring platform 202 is bolted on one side to the corner load arm 201 and on the other side to the moving plate 203 via a rail-slider mechanism, and the suspension assembly 1 is bolted on the moving plate 203.

As shown in fig. 5, the high-speed road surface drum assembly 3 includes a first rotary drive assembly capable of driving the high-speed drum 301 to rotate, and a high-speed drum 301. As shown in fig. 5, the first rotary drive assembly includes a high-speed motor 306, a gear box 305, and a first motor base 307, wherein the high-speed motor 306 and the gear box 305 are fixed on the first motor base 307, and an output end of the high-speed motor 306 is connected to the first central rotating shaft 302 of the high-speed rotating drum 301 through the gear box 305. The high-speed pavement drum assembly further comprises a first drum base 304, a groove for placing the high-speed drum 301 is formed in the middle of the first drum base 304, and a first central rotating shaft 302 of the high-speed drum 301 is fixed on the first drum base 304 through a bearing and a bearing seat 303. The maximum rotating speed of the high-speed road surface rotary drum component 3 is 500r/min, and the maximum driving speed can be simulated to be 180 km/h.

The impact drum assembly 4, as shown in fig. 6, comprises a second rotary drive assembly, a pebble pavement drum 401 and a speed bump pavement drum 402, which are capable of driving the pebble pavement drum 401 and the speed bump pavement drum 402 in rotation. The pebble pavement drum 401 simulates a pebble pavement and is manufactured according to equal proportion of pebble road conditions of a test yard and fixed on a drum base body through bolts. The speed bump road surface rotary drum 402 simulates a speed bump which is manufactured according to equal proportion of the road condition of the speed bump in the test yard and is fixed on the surface of a rotary drum base body through bolts. The second rotary driving component comprises a low-speed motor 409, a small belt pulley 407, a large belt pulley 406, a belt 408 and a second motor base 410, wherein the low-speed motor 409 is fixed on the second motor base 410, and the output end of the low-speed motor 409 is fixedly connected with the small belt pulley 407. The pebble pavement drum 401 and the speed bump pavement drum 402 are coaxially arranged, the pebble pavement drum 401 and the speed bump pavement drum 402 are placed on a second central rotating shaft 403 in parallel, the large belt pulley 406 is fixed on the second central rotating shaft 403 of the pebble pavement drum 401 and the speed bump pavement drum 402, and the large belt pulley 406 and the small belt pulley 407 are connected through a belt 408. The big belt pulley 406 is matched with the second central rotating shaft 403, the small belt pulley 407 is matched with the rotating shaft of the low-speed motor 409, and the small belt pulley 407 drives the big belt pulley 406 to rotate through a belt 408 and simultaneously drives the rotary drum to rotate. The impact pavement drum assembly 4 further comprises a second drum base 410, a groove for placing the pebble pavement drum 401 and the deceleration strip pavement drum 402 is formed in the middle of the second drum base 410, and two ends of a second central rotating shaft 403 of the pebble pavement drum 401 and the deceleration strip pavement drum 402 are fixed on the second drum base 410 through a bearing and a bearing seat 404.

As shown in fig. 7, the drum switching assembly 5 includes a horizontal sliding assembly and a mounting platform 501, the horizontal sliding assembly can drive the mounting platform 501 to move horizontally, and the loading system 2 is fixed on the mounting platform 501. The horizontal sliding assembly comprises a sliding block driving motor 503, a second lead screw 502, a third sliding block 507, a linear bearing 504, a third guide rail 505 and a switching sliding table base 506. Third guide rail 505 is fixed switch the top surface of slip table base 506, mount table 501 pass through linear bearing 504 with third guide rail 505 is connected, slider driving motor 503 with second lead screw 502 is all fixed to be set up switch on the slip table base 506, slider driving motor 503's output with the one end fixed connection of second lead screw 502, third slider 507 with mount table 501 fixed connection, the second screw hole has been seted up on the third slider 507, the external screw thread of second lead screw 502 with the internal thread of second screw hole cooperatees, slider driving motor 503 can drive second lead screw 502 and rotate, make third slider 507 with the mount table 501 removes about.

The fatigue testing device for the automobile chassis road test in this embodiment 1 is used for the automobile chassis road test simulation.

(1) Test 1: simulation road test high-speed road surface impact test for automobile chassis

Firstly, determining experimental parameters, wherein a test object is a left rear wheel and a suspension system of a certain vehicle type, the camber angle of the wheel is 1.594 degrees, the self weight of the vehicle is 2145kg, the full-load vehicle weight is 2825kg, and the target load is an acquired road load spectrum file.

The tested wheel and suspension assembly is then assembled. The parts such as the wheel of a certain motorcycle type and suspension system are bought in the market, wheel and quarter suspension subassembly are installed on the suspension mount according to real vehicle spatial layout, and the suspension mount passes through the bolt and installs on the adapter plate, and each bolted connection point is tightened and is marked according to the required moment of torsion, conveniently looks over whether bolt or nut is anti-loose in the experimental car to aerify the tire to tire pressure 200kPa, paste 4 foil gages at the spoke of wheel, wheel center, outer rim, interior rim.

Next, the tested wheel and suspension assembly is mounted to a loading system. The adapter plate of the tested suspension assembly with the real vehicle wheel is connected with the movable plate of the loading system through bolts. And a six-component force sensor (six-component force-measuring platform) is mounted between the movable plate and the adapter plate.

Then, the camber angle is adjusted. The inclination angle electric cylinder drives the inclination angle loading arm to rotate 1.594 degrees around the inclination angle rotating shaft, so that the wheel tire assembly is driven to generate a camber angle of 1.594 degrees.

Next, a high speed drum load is applied. The preload motor moves the preload arm downward so that the wheel and tire assembly presses against the high speed drum, producing a vertical load equal to 706.25kg for a quarter full load. And starting a high-speed rotary drum component, a corner motor, a vertical load hydraulic actuator (a high-frequency response hydraulic cylinder for simulating vertical bump load of a wheel) and an acceleration torque motor, wherein the rotating speed of the high-speed rotary drum is 120 km/h. And acquiring a strain signal of a strain gauge adhered to the wheel.

And calculating the damage. And (3) carrying out statistical analysis on the strain amplitude and the accumulated frequency, and calculating an actually measured wheel damage value corresponding to a standard (strain amplitude) S- (frequency) N curve to obtain an automobile chassis high-speed simulation test damage result with wheels and a suspension system, as shown in the table 1 below, wherein the damage result is counted in a high-speed drum high-speed pavement simulation test.

Table 1 statistics of damage results of simulation test of high speed drum highway surface.

Test group

Strain gage

1 damage number

Strain gage

2 damage number

Strain gage

3 damage number

Strain gage

4 damage number

High speed simulation test

1.4

1.5

1.2

(2) And (3) testing 2: simulation road test pebble road surface impact test for automobile chassis

The loading system in example 1 was switched over the pebble road drum and the pre-loading motor moved the pre-loading arm downward so that the wheels pressed against the impact road drum, producing a vertical load equal to 706.25kg of a quarter full load. Starting a rotary drum impacting the road surface and a vertical load hydraulic actuator (a high-frequency response hydraulic cylinder for simulating the vertical bump load of a wheel); the rotating speed of the impact road surface rotary drum is 40 km/h; vertical load and longitudinal load borne by the wheel are collected in real time through a six-component sensor, and relative damage values are counted to obtain the load and damage result statistics of the impact drum pebble pavement simulation test shown in the table 2.

Table 2 statistics of the load and damage results of the impact drum pebble pavement simulation test.

Test group	Maximum vertical load (kN)	Maximum longitudinal load (kN)	Mean relative damage value
				Impact simulation test	21.02	15.21	1.17

(3) Comparative test 1: road simulation testing machine test of wheel

The same type of wheel tire assembly as in the test 1 in the example 1 is selected, a strain gauge at the same position as the test 1 in the example 1 is adhered to a wheel, a road simulation test of the wheel is performed on a road simulation testing machine, the same target load file as the test 1 in the example 1 is applied, a strain signal in the loading process is collected, and the damage value of the wheel is calculated. The road simulator high speed simulation test results for the wheels of comparative test 1 as in table 3 below.

Table 3 high speed simulation test results of the road simulation tester for the wheel of comparative test 1.

Test group

Strain gage

1 damage number

Strain gage

2 damage number

Strain gage

3 damage number

Strain gage

4 damage number

High speed test of simulation testing machine

1.3

1.4

1.6

1.3

(4) Comparative test 2: impact test on solid cobble pavement

And selecting a strengthened durable road section cobblestone road with the same parameters as the cobblestone road drum in a certain automobile test field, and testing the same type of vehicles. The speed per hour is 40km/h and the vehicle runs through two kinds of pebble pavements. In order to ensure the safety of a driver, a square rolling frame is arranged in the vehicle body, and the driver wears safety clothes and a helmet. The front axle weight of the wheel is adjusted to 900kg, and the rear axle weight is adjusted to 706.25 kg. The vehicle was driven at a speed of 40km/h to pass over a pebble road (the driving distance was the same as in test 2), the vertical load and the longitudinal load applied to the left and rear wheels were collected and the relative damage values were counted, and the results are shown in table 4.

TABLE 4 comparative test 2 statistics of load and damage results of real vehicle pebble pavement impact test

Test group	Maximum vertical load (kN)	Maximum longitudinal load (kN)	Mean relative damage value
				Impact test on solid cobble pavement	19.51	13.20	1

The test results show that under the same wheel tire assembly and target load file, the fatigue test equipment for the automobile chassis road simulation test is adopted to carry out the high-speed pavement simulation test of the automobile chassis and the wheel damage results measured by the high-speed simulation test of the wheels by adopting the road simulation testing machine for the wheels have high consistency. Under the same cobble pavement parameters, the fatigue test equipment for the automobile chassis simulation road test has the advantages that the cobble pavement simulation test of the automobile chassis is carried out when the automobile chassis is subjected to an egg impact test, the vertical load, the longitudinal load and the relative damage measured by the real cobble pavement impact test are high in consistency with the test result measured by a test yard, and the cobble pavement test of the test yard can be replaced.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The fatigue test equipment for the automobile chassis simulation road test is characterized by comprising a suspension assembly, a loading system, a high-speed road surface rotary drum assembly, an impact road surface rotary drum assembly and a rotary drum switching assembly, wherein the suspension assembly is installed on the loading system and can be loaded onto the high-speed road surface rotary drum assembly and the impact road surface rotary drum assembly through wheels; the drum switching assembly is capable of switching a wheel fixed to the suspension assembly between the high speed road drum assembly and the impact road drum assembly.

2. A fatigue testing apparatus for a simulated road test of an automobile chassis according to claim 1, wherein said suspension assembly comprises an adapter plate, a suspension holder and a quarter suspension for mounting a wheel, said quarter suspension being fixed to said suspension holder, said suspension holder being fixed to said adapter plate.

3. The fatigue test equipment for the automobile chassis simulation road test is characterized in that the loading system comprises a side load loading assembly, a vertical load loading assembly, a vehicle weight preload loading assembly, an inclination angle loading assembly, a driving torque loading assembly and a movable plate, wherein the side load loading assembly, the vertical load loading assembly, the vehicle weight preload loading assembly and the inclination angle loading assembly act on the movable plate, and the adapter plate is fixedly connected with the movable plate; the driving torque loading assembly acts on a transmission shaft of the quarter suspension to drive wheels to rotate in an accelerated mode.

4. The fatigue test equipment for the automobile chassis simulation road test is characterized in that the inclination angle loading assembly comprises an inclination angle machine body, an inclination angle base and an inclination angle electric cylinder, wherein the lower end of the inclination angle machine body is pivotally fixed on the inclination angle base, the bottom end of the inclination angle electric cylinder is movably connected on the inclination angle base, a piston rod of the inclination angle electric cylinder is movably connected on the inclination angle machine body, and the inclination angle machine body can be driven to rotate around a pivot shaft by the expansion and contraction of the piston rod of the inclination angle electric cylinder;

the vehicle weight preload loading assembly comprises a preload motor, a first lead screw, a first sliding block and a preload arm, wherein the preload motor is fixed on the inclination angle machine body, an output shaft of the preload motor is fixedly connected with the first lead screw, a first threaded hole is formed in the first sliding block, an external thread of the first lead screw is matched with an internal thread of the first threaded hole, the first sliding block is fixed on the preload arm, and the preload motor can drive the first lead screw to rotate to realize the up-and-down movement of the preload arm;

the lateral load loading assembly comprises a corner motor and a corner loading arm, a shell of the corner motor is connected with the corner loading arm, a rotating shaft of the corner motor is fixedly connected with the preloading arm, and the corner motor can drive the corner loading arm to rotate around the rotating shaft of the corner motor;

the vertical load loading assembly comprises a hydraulic actuator, the hydraulic actuator is fixed at the upper end of the corner loading arm, the movable plate is vertically fixed on the corner loading arm, and a piston rod of the hydraulic actuator is connected with the upper end of the movable plate;

the driving torque loading assembly comprises an accelerating torque driving shaft, an accelerating torque motor and a motor mounting table, wherein the accelerating torque motor is fixed on the motor mounting table, the output end of the accelerating torque motor is connected with the accelerating torque driving shaft, and the accelerating torque driving shaft is fixedly connected with a transmission shaft of the quarter suspension.

5. The fatigue testing apparatus for the automobile chassis simulation road test as set forth in claim 4, wherein the pre-loading arm and the corner loading arm are each L-shaped, a housing of the corner motor is fixed integrally with a horizontal portion of the corner loading arm, and a rotation shaft of the corner motor is fixed to the horizontal portion of the pre-loading arm.

6. A fatigue test apparatus for a simulated road test of an automobile chassis according to claim 4, wherein said loading system further comprises a six-component force-measuring platform, one side of said six-component force-measuring platform being fixed to said corner loading arm and the other side of said six-component force-measuring platform being fixed to said movable plate.

7. A fatigue testing apparatus for a simulated road test of an automobile chassis according to claim 6, wherein a second rail is fixedly provided on said six-component force-measuring platform, a second slider is provided on said second rail, and said movable plate is fixed to said second slider.

8. A fatigue testing apparatus for a simulated road test of an automobile chassis according to claim 4, wherein said adapter plate and said movable plate are provided with a plurality of rows of fixing holes.

9. A fatigue testing apparatus for automotive chassis simulation road tests according to any one of claims 1 to 8, wherein said high speed road drum assembly comprises a first rotary drive assembly and a high speed drum, said first rotary drive assembly being capable of driving said high speed drum in rotation.

10. The fatigue testing apparatus for the automobile chassis simulation road test as claimed in claim 9, wherein the first rotary driving assembly comprises a high-speed motor, a gearbox, and a first motor base, the high-speed motor and the gearbox are both fixed on the first motor base, and an output end of the high-speed motor is connected with the central rotating shaft of the high-speed rotating drum through the gearbox.

11. The fatigue test equipment for the automobile chassis simulation road test as claimed in claim 9, wherein the high-speed road surface drum assembly further comprises a first drum base, a groove for placing the high-speed drum is formed in the middle of the first drum base, and a central rotating shaft of the high-speed drum is fixed on the first drum base through a bearing and a bearing seat.

12. A fatigue test apparatus for simulating road tests on an automobile chassis according to any one of claims 1 to 8 and 10 to 11, wherein the impact drum assembly comprises a second rotary drive assembly, a pebble pavement drum and a speed bump pavement drum, the second rotary drive assembly being capable of driving the pebble pavement drum and the speed bump pavement drum to rotate.

13. The fatigue testing apparatus for the automobile chassis road test simulator according to claim 12, wherein the second rotary driving assembly comprises a low-speed motor, a small belt pulley, a large belt pulley, a belt, and a second motor base, the low-speed motor is fixed on the second motor base, the output end of the low-speed motor is fixedly connected with the small belt pulley, the pebble pavement drum and the deceleration strip pavement drum are coaxially arranged, the large belt pulley is fixed on the central rotating shaft of the pebble pavement drum and the deceleration strip pavement drum, and the large belt pulley and the small belt pulley are connected through the belt.

14. The fatigue test equipment for the simulated road test of the automobile chassis as claimed in claim 12, wherein the impact road surface drum assembly further comprises a second drum base, a groove for placing the pebble road surface drum and the deceleration strip road surface drum is formed in the middle of the second drum base, and central rotating shafts of the pebble road surface drum and the deceleration strip road surface drum are fixed on the second drum base through a bearing and a bearing seat.

15. A fatigue testing apparatus for automotive chassis simulation road tests according to claim 9, wherein said impact drum assembly comprises a second rotary drive assembly, a pebble pavement drum and a speed bump pavement drum, said second rotary drive assembly being capable of driving said pebble pavement drum and said speed bump pavement drum to rotate.

16. A fatigue testing apparatus for simulating a road test on an automobile chassis according to any one of claims 1 to 8, 10 to 11 and 13 to 15, wherein the drum switching assembly comprises a horizontal sliding assembly and a mounting table, the horizontal sliding assembly can drive the mounting table to move horizontally, and the loading system is fixed on the mounting table.

17. The fatigue testing device for the automobile chassis road test simulator according to claim 16, wherein the horizontal sliding assembly comprises a slider driving motor, a second lead screw, a third slider, a linear bearing, a third guide rail and a switching sliding table base, the third guide rail is fixed on the top surface of the switching sliding table base, the mounting table is connected with the third guide rail through the linear bearing, the slider driving motor and the second lead screw are both fixedly arranged on the switching sliding table base, the output end of the slider driving motor is fixedly connected with one end of the second lead screw, the third slider is fixedly connected with the mounting table, the third slider is provided with a second threaded hole, the external thread of the second lead screw is matched with the internal thread of the second threaded hole, and the slider driving motor can drive the second lead screw to rotate, the mounting table is moved left and right.