CN113155482A

CN113155482A - New energy automobile chassis physical performance test system and test method

Info

Publication number: CN113155482A
Application number: CN202110465802.XA
Authority: CN
Inventors: 田科勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-07-23

Abstract

The invention provides a new energy automobile chassis physical performance test system and a test method, and relates to the technical field of new energy automobile chassis production test, the new energy automobile chassis physical performance test system comprises a base, wherein the base is fixed on the ground, an arc-shaped bent bottom support plate is fixedly arranged at the top end of the base, and the middle part of the top surface of the bottom support plate is a downward-concave arc-shaped surface; according to the invention, the middle part of the new energy automobile chassis is pressed in by the gravity of the bearing block, so that after the middle part of the new energy automobile chassis is stressed, the left side and the right side of the new energy automobile chassis are slightly bent upwards, the middle part of the top surface of the bottom supporting plate is provided with the arc-shaped surface which is sunken downwards, the direction of the arc-shaped surface is consistent with the direction of the bending of the left side and the right side of the new energy automobile chassis, and the sliding base is matched with the sliding connection of the first slide way, so that the bending resistance of the new energy automobile chassis is reduced, and the bending generated in the running process of the new energy automobile chassis in a load state can be observed manually.

Description

New energy automobile chassis physical performance test system and test method

Technical Field

The invention relates to the technical field of new energy automobile chassis production testing, in particular to a new energy automobile chassis physical performance testing system and a new energy automobile chassis physical performance testing method.

Background

The new energy automobile adopts unconventional automobile fuel as a power source (or uses conventional automobile fuel and adopts a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the automobile, forms an automobile with advanced technical principle, new technology and new structure, and comprises four types of Hybrid Electric Vehicles (HEV), pure electric vehicles (BEV, including solar energy automobiles), Fuel Cell Electric Vehicles (FCEV), other new energy automobiles (such as efficient energy accumulators such as super capacitors and flywheels) and the like. Unconventional automotive fuels refer to fuels other than gasoline, diesel.

The new energy automobile chassis system comprises subsystems such as a suspension, a brake and a steering, and traditionally influences the comfort, the safety and the kneading control performance of the whole automobile, and for the new energy automobile, the influence is more profound. The chassis system of the energy automobile needs to adapt to the diversity of vehicle-mounted energy and is suitable for a highly integrated system module, and meanwhile, the design of the inner space and the outer shape of the automobile is not limited, so that the physical performance test of the new energy automobile chassis is needed after the new energy automobile chassis is produced and assembled and before the new energy automobile chassis leaves a factory.

At present, patent number CN202010264042.1 discloses a new energy automobile makes chassis physical properties test system and test method, relates to car production processing technology field, and this new energy automobile makes chassis physical properties test system includes fixed mounting in the bottom suspension fagging on ground, the top of bottom suspension fagging is equipped with the collateral branch support rib board of being fixed in the bottom suspension fagging top vertically, the top of collateral branch support rib board is equipped with the top backup pad that is the horizontal fixation, the fixed electric putter of a plurality of equidistance is installed on the top of top backup pad. According to the invention, the side supporting rib plate vertically fixed at the top end of the bottom supporting plate fixedly arranged on the ground is arranged at the top end of the bottom supporting plate, the plurality of electric push rods are upwards supported through the side supporting plate, and each load bag is independently controlled through the plurality of electric push rods, so that the load test can be carried out on any position of the automobile chassis when the automobile chassis is subjected to the load test, and the physical test performance of the automobile chassis is improved.

The chassis physical performance testing system disclosed in the above patent still has some disadvantages in practical use, and the specific disadvantages are that:

at present, when a new energy automobile chassis is tested before leaving a factory, multiple performances of the chassis can be tested, but the function of equipment is single, one piece of equipment is needed for each test of the chassis, and thus the multiple tests can require frequent equipment transfer of the new energy automobile chassis, so that the new energy chassis is slow in testing speed and low in testing efficiency when multiple physical performance tests are carried out on the new energy chassis, and the requirements of mass production are difficult to meet.

Disclosure of Invention

The invention aims to provide a new energy automobile chassis physical performance test system and a test method, and solves the technical problems that in the prior art, when a new energy automobile chassis is tested before leaving a factory, multiple performances of the chassis can be tested, but the function of equipment is single, one piece of equipment is needed for each test of the chassis, so that the new energy automobile chassis needs to be frequently transferred for multiple tests, and the new energy automobile chassis is low in test speed and test efficiency and difficult to meet the requirement of mass production when being tested for multiple physical performances.

The technical problem to be solved by the invention is realized by adopting the following technical scheme: a new energy automobile chassis physical property testing system tests the load physical property of a new energy automobile chassis before delivery, and comprises a base, wherein the base is fixed on the ground, the top end of the base is fixedly provided with a bottom supporting plate which is curved in an arc shape, the middle part of the top surface of the bottom supporting plate is an arc-shaped surface which is sunken downwards, the top surface of the bottom supporting plate is symmetrically provided with four first slide ways, each first slide way is internally connected with a sliding base in a sliding way, the top end of each sliding base is provided with a roller bottom supporting seat, the top end of each roller bottom supporting seat is fixedly provided with two rollers which are arranged in parallel, the middle part of each roller is provided with a through slide hole, and the slide hole in the middle part of each roller is connected to a slide tooth in a sliding fit way, the two ends of each sliding tooth are rotatably connected to a roller support through bearings, the bottom end of each roller support is fixed to the top end of a roller bottom supporting seat, an electric motor is fixedly mounted at the top end of the roller bottom supporting seat, an output shaft extends forwards from the electric motor, a first belt wheel is fixedly mounted at the top end of the output shaft of the electric motor, a second belt wheel is fixedly mounted at one end of each sliding tooth, and the second belt wheel and the first belt wheel are in V-belt transmission;

the top end of the base is fixedly provided with side supporting rods which are vertical to the top end of the base, the top end of each side supporting rod is fixedly provided with a top supporting frame, the middle part of each top supporting frame is provided with a sliding groove, two ends of the inner wall of the sliding groove are rotatably connected with threaded lead screws, a sliding block is connected in the sliding groove in a sliding manner, the middle part of the sliding block is provided with a through threaded hole, the threaded hole in the middle part of the sliding block is arranged on the threaded lead screw, the bottom end of the sliding block is fixedly provided with a suspension bracket downwards, the bottom end of the suspension bracket is suspended with a suspension bag, and a plurality of bearing blocks are stored in the suspension bag;

at least two first electric push rods are fixedly arranged at the bottom end of each roller bottom supporting seat, and a telescopic extension rod is fixedly arranged between every two adjacent first electric push rods.

As a preferred technical scheme of the present invention, the top ends of the plurality of first electric push rods at the bottom end of each drum bottom support seat are jointly and fixedly arranged on a bottom support plate, a hinge is arranged between the bottom support plate and the drum bottom support seat, a plurality of support springs are symmetrically arranged between the top end of the bottom support plate and the drum bottom support seat, and the plurality of support springs are symmetrically arranged back and forth between the top end of the bottom support plate and the drum bottom support seat along the hinge.

As a preferred technical scheme of the invention, the roller comprises a jolting wheel, a slag wheel and a smooth wheel, the roller is of a cylindrical structure, the roller is provided with three gear teeth of the jolting wheel, the slag wheel and the smooth wheel which are different in surface structure and are stacked together along the axial direction, the distance between the gear teeth on the outer circular surface of the jolting wheel is large, so that the tire of the automobile chassis can shake in a high amplitude in the driving process, the distance between the gear teeth on the outer circular surface of the slag wheel is moderate, so that the wheel of the automobile chassis can shake in a low amplitude and high frequency in the driving process, and the surface of the smooth wheel is a plane.

As a preferable technical scheme of the invention, the roller also comprises a sliding frame, a sliding chute, a rack, a worm gear, a worm, a second servo motor and a pushing frame, the middle part of the roller bracket at two ends of each roller is provided with a through sliding hole, a rack is connected in a sliding way in the sliding hole in the middle of the roller bracket in a sliding fit way, sliding grooves are symmetrically arranged on the front side and the rear side of the rack, the front side and the rear side of the inner wall of the sliding hole in the middle of the roller bracket are symmetrically and fixedly provided with sliding brackets which are in sliding fit with the sliding grooves, the rack is connected with the sliding chute in a sliding way through the sliding frame to realize stable sliding, the second servo motor is fixedly arranged at the top end of the roller bottom supporting seat, an output shaft extends forwards from the second servo motor, a worm is fixedly arranged at the top end of the output shaft of the second servo motor, the worm is meshed with the worm wheel, and the worm wheel is meshed with the rack;

two pushing frames which are upright on the top end of the rack are symmetrically arranged at the top end of the rack, the two pushing frames are respectively arranged at two ends of the roller, and the pushing frames are in sliding connection with two ends of the roller.

As a preferable technical scheme of the invention, the pushing frame comprises steel balls, a plurality of rolling ball grooves are formed in the side wall of the pushing frame, which faces the end face of the roller, at equal intervals, steel balls are rotatably connected in each rolling ball groove, and the steel balls on the side wall of the pushing frame are in rolling contact with the end face of the roller.

As a preferred technical scheme of the invention, a second electric push rod is fixedly installed in the middle of the top end of the bottom supporting disk, a push rod extends upwards from the second electric push rod, a lifting block is fixedly installed at the top end of the push rod, and the top surface of the lifting block is attached to the bottom surface of the automobile chassis.

A new energy automobile chassis physical property test method mainly comprises the following steps:

s1, chassis installation: placing the new energy automobile chassis to be tested on the roller bottom supporting seats on the top surface of the bottom supporting disc, and supporting the tire of the new energy automobile chassis to be tested through the two rollers on each roller bottom supporting seat so as to stably place the new energy automobile chassis on the top surface of the bottom supporting disc;

s2, chassis no-load flat ground running test: performing no-load running test on the new energy automobile chassis placed on the top surface of the bottom supporting disc in the step S1, driving the pushing frame to slide left and right through each second servo motor, enabling the rollers supported below each tire of the new energy automobile chassis to slide synchronously, sliding the smooth wheels of the rollers to the positions below each tire of the new energy automobile chassis to support the tires, then driving each roller to rotate synchronously through the motor, and observing the running state of the new energy automobile chassis on the flat ground in the no-load state;

s3, testing the running of the chassis on the slag road surface in an unloaded state: step S2, after the running test of the new energy automobile chassis on the flat ground in the no-load state is completed, the new energy automobile chassis is lifted upwards through the lifting and supporting block, the pushing frame is driven by each second servo motor to slide left and right, so that the rollers supported below each tire of the new energy automobile chassis slide synchronously, the tires are supported by the rollers sliding below each tire of the new energy automobile chassis, then the lifting and supporting block descends downwards, each tire of the new energy automobile chassis is in rolling contact with the replaced tire, the motors drive each roller to rotate synchronously, and the running state of the new energy automobile chassis on the slag road surface in the no-load state is observed;

s4, chassis no-load bump road surface driving test: after the running test of the new energy automobile on the slag road surface in the no-load state of the chassis is completed in the step S3, the new energy automobile chassis is lifted upwards by lifting the lifting block, the pushing frame is driven by each second servo motor to slide rightwards, so that the rollers supported under each tire of the new energy automobile chassis synchronously slide, the jolting wheels of the rollers slide to the lower side of each tire of the new energy automobile chassis to support the tires, then each tire of the new energy automobile chassis is in rolling contact with the replaced bumping wheel by descending the lifting block, the motor drives each roller to synchronously rotate, the wheel teeth on the surface of the jolting wheel are large in distance, so that the tire of the new energy automobile chassis generates high-amplitude jolting and shaking in the driving process, and the driving state of the new energy automobile chassis on a jolting road surface in an idle state is observed;

s5, chassis load running test on different road surfaces: after the running test on the bumpy road surface is completed in the no-load state of the new energy automobile chassis in the step S4, the hanging bag is put down and pressed above the new energy automobile chassis, so that the new energy automobile chassis in the running process is loaded, each second servo motor drives the pushing frame to slide left and right, a roller supported below each tire of the new energy automobile chassis is synchronously slid, bump wheels, slag wheels and smooth wheels on the roller are sequentially and synchronously replaced, the new energy automobile chassis is simulated in the load state to run on different road surfaces, and the running states of the new energy automobile chassis on different road surfaces in the load state are observed;

s6, bending test in the chassis driving process: in the running test process of the new energy automobile on different road surfaces under the chassis load state in the step S5, the servo motor drives the sliding block to slide left and right, so that the hanging bag moves to the middle position of the new energy automobile chassis, the bearing block in the hanging bag is pressed into the middle position of the new energy automobile chassis through the hanging support, and is pressed into the middle position of the new energy automobile chassis through the gravity of the bearing block, so that the left side and the right side of the new energy automobile chassis are slightly bent upwards after the middle part of the new energy automobile chassis is stressed, the middle part of the top surface of the bottom supporting plate is designed into a downward-sunken arc-shaped surface, the direction of the downward-sunken arc-shaped surface is consistent with the direction of bending of the left side and the right side of the new energy automobile chassis, and the bending resistance of the new energy automobile chassis is reduced by matching with the sliding connection of the sliding base and the first slide way, so that the bending generated in the running process of the new energy automobile chassis in a load state can be observed manually;

s7, inclination test in the chassis driving process: in the running test process on different road surfaces under the chassis load state of the new energy automobile in the step S5, the first electric push rods on one side of the new energy automobile chassis on the top surface of the bottom supporting plate are synchronously lifted, so that the drum bottom supporting seats on the bottoms of tires on two sides of the new energy automobile chassis are different in height, the automobile body is inclined in the running process under the loading state of the new energy automobile chassis, the running state on different ground under the inclined state of the automobile body is observed, a hinge is arranged between the bottom supporting plate and the roller bottom supporting seat, a plurality of supporting springs which are symmetrically arranged in front and at the back of the hinge can control the roller bottom supporting seat to adaptively tilt according to the tilting height of the vehicle body, the road condition that the tires of the new energy automobile chassis run on the inclined ground can be simulated more truly, and the state generated in the running process of the new energy automobile chassis on the inclined road surface in the inclined state can be observed manually.

Compared with the prior art, the invention at least comprises the following beneficial effects:

the invention is used for carrying out load physical performance test on a new energy automobile chassis before leaving a factory, an arc-shaped bent bottom supporting plate is fixedly arranged at the top end of a base, the middle part of the top surface of the bottom supporting plate is a downward-concave arc surface, a roller bottom supporting seat supported below the new energy automobile chassis can slide towards two sides along the middle part of the new energy automobile chassis through the arc surface, and the top surface of the arc surface is arc-shaped bent, so that the roller bottom supporting seat slides along the middle part of the new energy automobile chassis along an arc shape when sliding, and the roller bottom supporting seat can still safely and powerfully support the new energy automobile chassis in the bending deformation process of the new energy automobile chassis, and cannot obstruct the bending bends at two sides of the new energy automobile chassis, thereby being beneficial to more accurately observing the deformation condition of the new energy automobile chassis.

Secondly, in the process of testing the physical properties of the new energy automobile chassis, the rack is driven to slide left and right by each second servo motor, in the process of sliding the rack left and right, each roller under the new energy automobile chassis tire is synchronously pushed to synchronously slide by the pushing frames at the two ends of the roller, so that the switching of different road surfaces is realized, the invention simulates the running of the new energy automobile chassis tire on the road surface through the rotation of the roller, and simulates the physical performance of the new energy automobile in the running process on different road surfaces through the switching of different road surfaces, the invention leads the tire contact area of the new energy automobile chassis to be large by axially stacking three gear teeth with different surface structures, namely a jolt wheel, a slag roller and a smooth roller, the new energy automobile chassis is supported more safely and firmly, tires are prevented from sliding off the roller in the driving process, and the safety in the new energy automobile chassis testing process is improved.

Thirdly, the new energy automobile chassis physical performance test system provided by the application can carry out a plurality of tests such as a tire grip force test, an automobile body inclined driving safety test, a chassis anti-jolting performance test, a chassis anti-bending performance test and the like on the new energy automobile chassis, realizes a plurality of functions of one machine, brakes tires on the new energy automobile chassis through the inside of the new energy automobile, observes the grip force performance test of the tires by utilizing the high-speed rotation of a roller, and synchronously lifts and descends through a plurality of first electric push rods at one side of the new energy automobile chassis on the top surface of a bottom support plate, so that the roller bottom support seats at the bottoms of the tires at two sides of the new energy automobile chassis are different in height, the automobile body inclination is generated in the driving process under the new energy automobile chassis load state, the driving states on different ground under the automobile body inclination state are observed, and the surface of the chassis inclination prevention performance under the automobile body inclination state is improved, this application still is provided with the hinge through between end support plate and the cylinder end support seat, and a plurality of supporting spring that the symmetry set up around the hinge can control cylinder end support seat and carry out the adaptability slope according to the automobile body bank height to simulate the road conditions that the tire of new energy automobile chassis was gone on the ground of slope more really, the state that produces at the inclined pavement surface travel in-process under the artifical new energy automobile chassis tilt state of observing, the accurate nature of improvement measure.

The servo motor drives the sliding block to slide left and right, so that the hanging bag moves to the middle position of the new energy automobile chassis, the bearing block in the hanging bag is pressed into the middle position of the new energy automobile chassis through the hanging frame, the bearing block is pressed into the middle position of the new energy automobile chassis through the gravity of the bearing block, after the middle part of the new energy automobile chassis is stressed, the left side and the right side of the new energy automobile chassis are slightly bent upwards, the middle part of the top surface of the bottom supporting plate is designed to be a downwards-concave arc-shaped surface, the direction of the bending of the left side and the right side of the new energy automobile chassis is consistent with the direction of the bending of the left side and the right side of the new energy automobile chassis, the bending resistance of the new energy automobile chassis is reduced by matching with the sliding connection of the sliding base and the first slide way, and the bending generated in the running process of the new energy automobile chassis in the loaded state can be conveniently observed manually.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a left side view structural schematic diagram of a new energy automobile chassis physical property testing system of the invention;

FIG. 2 is a schematic diagram of a front view structure of the new energy automobile chassis physical property test system of the invention;

FIG. 3 is an enlarged view of a portion of FIG. 1 in accordance with the teachings of the present invention;

FIG. 4 is a schematic top view of the sliding base of the present invention slidably engaged within the first channel of the top surface of the bottom support plate;

FIG. 5 is a schematic diagram of the right-side view of the sliding connection of the smooth pulley and the sliding tooth of the present invention;

FIG. 6 is a schematic view of the structure of the position of the steel ball on the side wall of the skid in the present invention;

FIG. 7 is a process flow chart of the new energy automobile chassis physical property testing method of the invention;

in the figure: 1. a base; 2. a bottom support disk; 201. a first slideway; 3. a first electric push rod; 301. a telescopic extension rod; 302. a support spring; 303. a hinge; 304. a roller bottom support seat; 4. a drum; 401. a skid frame; 402. a chute; 403. a rack; 404. a worm gear; 405. a worm; 406. a second servo motor; 407. a pushing frame; 408. a jolting wheel; 409. a slag wheel; 410. a smooth pulley; 411. steel balls; 5. an electric motor; 6. a first pulley; 7. a second pulley; 8. sliding the teeth; 9. a side support bar; 10. a chute; 11. a threaded lead screw; 12. a slider; 13. a top support frame; 14. a suspension frame; 15. hanging the bag; 16. a drum support; 17. a servo motor; 18. a second electric push rod; 19. a push rod; 20. lifting a supporting block; 21. a sliding base.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described below by combining with the specific drawings, and it is to be noted that the embodiments and the features in the embodiments can be combined with each other in the application without conflict.

Please refer to fig. 1-7, which are schematic structural diagrams illustrating a system and a method for testing physical properties of a new energy vehicle chassis;

a new energy automobile chassis physical property test system tests the load physical property of a new energy automobile chassis before leaving the factory, the new energy automobile chassis physical property test system comprises a base 1, the base 1 is fixed on the ground, the top end of the base 1 is fixedly provided with an arc-shaped bent bottom supporting plate 2, the middle part of the top surface of the bottom supporting plate 2 is an arc-shaped surface which is downwards sunken, the top surface of the bottom supporting plate 2 is symmetrically provided with four first slideways 201, each first slideway 201 is internally connected with a sliding base 21 in a sliding way, the top end of each sliding base 21 is provided with a roller bottom supporting seat 304, the top end of each roller bottom supporting seat 304 is fixedly provided with two rollers 4, the two rollers 4 are arranged in parallel, the middle part of each roller 4 is provided with a through sliding hole, the sliding hole in the middle part of each roller 4 is connected on a sliding tooth 8 in a sliding fit way, two ends of each sliding tooth 8 are rotatably connected to the roller support 16 through bearings, the bottom end of each roller support 16 is fixed to the top end of the roller bottom support base 304, the top end of the roller bottom support base 304 is fixedly provided with the motor 5, the motor 5 extends forwards to form an output shaft, the top end of the output shaft of the motor 5 is fixedly provided with the first belt wheel 6, one end of each sliding tooth 8 is fixedly provided with the second belt wheel 7, and the second belt wheel 7 and the first belt wheel 6 are in V-belt transmission;

the top end of the base 1 is fixedly provided with side supporting rods 9 standing upright on the top end of the base 1, the top end of each side supporting rod 9 is fixedly provided with a top supporting frame 13, the middle part of each top supporting frame 13 is provided with a sliding chute 10, two ends of the inner wall of the sliding chute 10 are rotatably connected with threaded screw rods 11, a sliding block 12 is slidably connected in the sliding chute 10, the middle part of the sliding block 12 is provided with a through threaded hole, the threaded hole in the middle part of the sliding block 12 is installed on the threaded screw rods 11, the bottom end of the sliding block 12 is downwards fixedly provided with a suspension support 14, the bottom end of the suspension support 14 is suspended with a suspension bag 15, and a plurality of bearing blocks are stored in the suspension bag 15; the suspension frame 14 can be extended or shortened, and is similar to an electric push rod, so that the suspension bag 15 can be lifted and put down.

At least two first electric push rods 3 are fixedly arranged at the bottom end of each roller bottom supporting seat 304, and a telescopic extension rod 301 is fixedly arranged between every two adjacent first electric push rods 3.

The top ends of the first electric push rods 3 at the bottom end of each roller bottom support seat 304 are fixedly arranged on the bottom support plate 305 together, a hinge 303 is arranged between the bottom support plate 305 and the roller bottom support seat 304, a plurality of support springs 302 are symmetrically arranged between the top end of the bottom support plate 305 and the roller bottom support seat 304, and the plurality of support springs 302 are symmetrically arranged along the hinge 303 in the front-back direction between the top end of the bottom support plate 305 and the roller bottom support seat 304.

In particular, the invention tests the physical performance of the load of the new energy automobile chassis before leaving the factory, the top end of the base 1 is fixedly provided with an arc-shaped bent bottom supporting disk 2, the middle part of the top surface of the bottom supporting disk 2 is a downward-concave arc-shaped surface, the roller bottom supporting seat 304 supported under the new energy automobile chassis can slide to two sides along the middle part of the new energy automobile chassis through the arc-shaped surface, because the top surface of the arc-shaped surface is arc-shaped and bent, the roller bottom supporting seat 304 slides along the middle part of the new energy automobile chassis according to the arc shape when sliding, in the process of bending and deforming the new energy automobile chassis, the roller bottom supporting seat 304 can still safely and powerfully support the new energy automobile chassis, and the bending and bending of the two sides of the new energy automobile chassis can not be hindered, so that the deformation condition of the new energy automobile chassis can be observed more accurately.

Specifically, the new energy automobile chassis physical performance test system provided by the application can carry out a plurality of tests such as a tire grip strength test, an automobile body inclination driving safety test, a chassis anti-jolting performance test, a chassis anti-bending performance test and the like on the new energy automobile chassis, realizes a plurality of functions of one machine, brakes tires on the new energy automobile chassis through the inside of the new energy automobile, observes the grip strength performance test of the tires by utilizing the high-speed rotation of the roller 4, and synchronously lifts through a plurality of first electric push rods 3 on one side of the new energy automobile chassis on the top surface of the bottom support plate 2 to ensure that the heights of roller bottom support seats 304 at the bottoms of the tires on two sides of the new energy automobile chassis are different, so that the automobile body inclination is generated in the driving process under the new energy automobile chassis load state, the driving states on different ground under the automobile body inclination state are observed, and in order to improve the surface of the chassis inclination performance under the automobile body inclination state, this application still is provided with hinge 303 through being provided with between end support plate and the cylinder end support seat 304, a plurality of supporting spring 302 that hinge 303 front and back symmetry set up can control cylinder end support seat 304 and carry out the adaptability slope according to the automobile body bank height to simulate the road conditions that the tire of new energy automobile chassis was gone on the ground of slope more really, the state that the artifical new energy automobile chassis inclined state produced under the inclined road surface travel in-process, the precision of improvement measure.

Specifically, the servo motor 17 drives the sliding block to slide left and right, so that the hanging bag 15 moves to the middle position of the new energy automobile chassis, the bearing block in the hanging bag 15 is pressed into the middle position of the new energy automobile chassis through the hanging frame 14, the bearing block is pressed into the middle position of the new energy automobile chassis through the gravity of the bearing block, after the middle part of the new energy automobile chassis is stressed, the left side and the right side of the new energy automobile chassis are slightly bent upwards, the middle part of the top surface of the bottom supporting plate 2 is set to be a downward-concave arc-shaped surface, the direction of the bending of the left side and the right side of the new energy automobile chassis is consistent with the direction of the bending of the left side and the right side of the new energy automobile chassis, and the sliding base 21 is matched with the sliding connection of the first slide way 3, the bending obstruction of the new energy automobile chassis is reduced, and the bending generated in the driving process of the new energy automobile chassis in a load state can be observed manually.

The roller 4 comprises a jolting wheel 408, a slag wheel 409 and a smooth pulley 410, the roller 4 is of a cylindrical structure, the roller 4 is provided with three gear teeth with different surface structures, namely the jolting wheel 408, the slag wheel 409 and the smooth wheel 410, which are axially overlapped, the distance between the gear teeth on the outer circular surface of the jolting wheel 408 is large, so that the tire of the automobile chassis can shake in a high amplitude in the driving process, the distance between the gear teeth on the outer circular surface of the slag wheel 409 is moderate, the wheel of the automobile chassis can shake in a low amplitude and high frequency in the driving process, and the surface of the smooth pulley 410 is a plane.

According to the invention, the roller 4 is provided with the bumping wheel 408, the slag wheel 409 and the smooth wheel 410, and the wheel teeth with different surface structures are axially overlapped, so that the tire contact area of the new energy automobile chassis is large, the new energy automobile chassis is supported more safely and firmly, the tire is prevented from sliding off the roller 4 in the driving process, and the safety in the new energy automobile chassis testing process is improved.

The roller 4 further comprises a sliding frame 401, a sliding groove 402, a rack 403, a worm wheel 404, a worm 405, a second servo motor 406 and a pushing frame 407, wherein a through sliding hole is formed in the middle of each roller support 16 at two ends of each roller 4, the rack 403 is connected in the sliding hole in the middle of each roller support 16 in a sliding fit manner, the sliding grooves 402 are symmetrically formed in the front side and the rear side of each rack 403, the sliding frames 401 in sliding fit with the sliding grooves 402 are symmetrically and fixedly arranged on the front side and the rear side of the inner wall of the sliding hole in the middle of each roller support 16, the rack 403 is connected with the sliding grooves 402 in a sliding manner through the sliding frames 401 in the sliding holes to realize stable sliding, the second servo motor 406 is fixedly arranged at the top end of the roller bottom support base 304, an output shaft extends forwards from the second servo motor 406, the worm 405 is fixedly arranged at the top end of the output shaft of the second servo motor 406, the worm 405 is meshed with the worm wheel 404, and the worm wheel 404 is meshed with the rack 403;

two pushing frames 407 standing upright on the top end of the rack 403 are symmetrically arranged at the top end of the rack 403, the two pushing frames 407 are respectively arranged at two ends of the roller 4, and the pushing frames 407 are slidably connected with two ends of the roller 4.

Specifically, in the process of testing the physical properties of the new energy automobile chassis, the rack 403 is driven by each second servo motor 17406 to slide left and right, in the process of sliding the rack 403 left and right, each roller 4 under the new energy automobile chassis tire is synchronously pushed by the pushing frames 407 at the two ends of the roller 4 to slide synchronously, so that the switching of different road surfaces is realized, the running of the new energy automobile chassis tire on the road surface is simulated by the rotation of the roller 4, and the physical performance of the new energy automobile in the running process on different road surfaces is simulated by the switching of different road surfaces. The safety of the new energy automobile chassis in the testing process is improved.

The pushing frame 407 comprises steel balls 411, a plurality of ball grooves are formed in the side wall of the pushing frame 407 facing the end surface of the roller 4 at equal intervals, each ball groove is rotatably connected with a steel ball 411, and the steel balls 411 on the side wall of the pushing frame 407 are in rolling contact with the end surface of the roller 4.

In the invention, the steel balls 411 arranged on the side wall of the pushing frame 407 at equal intervals are in rolling contact with the end surface of the roller 4, so that when the roller 4 rotates at a high speed, the friction between the side wall of the pushing frame 407 and the end surface of the roller 4 is reduced, the service life of the roller 4 can be prolonged, and the rotation stability of the roller 4 is improved. When the pushing frame 407 pushes the roller 4 to slide left and right through the steel balls 411, the roller (4) can still keep stable rotation, which is beneficial to improving the rotation stability of the roller 4.

The middle part of the top end of the bottom supporting disk 2 is fixedly provided with a second electric push rod 18, the second electric push rod 18 extends upwards to form a push rod 19, the top end of the push rod 19 is fixedly provided with a lifting block 20, and the top surface of the lifting block 20 is attached to the bottom surface of the automobile chassis.

After one physical performance test of the new energy automobile chassis is completed, the lifting block 20 is lifted upwards to lift the new energy automobile chassis, each second servo motor 406 drives the pushing frame 407 to slide left and right, a roller 4 supported below each tire of the new energy automobile chassis is enabled to slide synchronously, the surface of the tire under the new energy automobile chassis is attached to gear teeth of different structures on the roller 4, and the running state of the tire on different road surfaces is simulated.

s1, chassis installation: placing the new energy automobile chassis to be tested on the roller bottom supporting seats 304 on the top surface of the bottom supporting disc 2, and supporting the tires of the new energy automobile chassis to be tested through the two rollers 4 on each roller bottom supporting seat 304, so that the new energy automobile chassis is stably placed on the top surface of the bottom supporting disc 2;

s2, chassis no-load flat ground running test: performing no-load running test on the new energy automobile chassis placed on the top surface of the bottom support disc 2 in the step S1, driving the pushing frame 407 to slide left and right through each second servo motor 406, so that the rollers 4 supported below each tire of the new energy automobile chassis generate synchronous sliding, sliding the smooth wheels 410 of the rollers 4 to the lower side of each tire of the new energy automobile chassis to support the tires, then driving each roller 4 to rotate synchronously through the motor 5, and observing the running state of the new energy automobile chassis on the flat ground in the no-load state;

s3, testing the running of the chassis on the slag road surface in an unloaded state: after the running test on the flat ground in the no-load state of the new energy automobile chassis is completed in the step S2, the new energy automobile chassis is lifted upwards through the lifting and supporting block 20, the pushing and moving frame 407 is driven by each second servo motor 406 to slide left and right, so that the roller 4 supported below each tire of the new energy automobile chassis can slide synchronously, the slag runner 409 of the roller 4 slides to the position below each tire of the new energy automobile chassis to support the tire, then the lifting and supporting block 20 descends downwards, each tire of the new energy automobile chassis is in rolling contact with the replaced slag runner 409, the motor 5 drives each roller 4 to rotate synchronously, and the running state of the new energy automobile chassis on the slag road surface in the no-load state is observed;

s4, chassis no-load bump road surface driving test: after the running test of the new energy automobile on the slag road surface in the no-load state of the chassis is completed in the step S3, the new energy automobile chassis is lifted upwards by lifting the lifting block 20 upwards, the pushing frame 407 is driven by each second servo motor 406 to slide left and right, the rollers 4 supported under each tire of the new energy automobile chassis synchronously slide, the jolting wheels 408 of the rollers 4 slide to the positions under each tire of the new energy automobile chassis to support the tires, then, each tire of the chassis of the new energy automobile is in rolling contact with the replaced bumping wheel 408 by descending the lifting block 20, the motor 5 drives each roller 4 to synchronously rotate, the distance between the wheel teeth on the surface of the jolting wheel 408 is large, so that the tire of the new energy automobile chassis generates high-amplitude jolting and shaking in the driving process, and the driving state of the new energy automobile chassis on a jolting road surface in an idle load state is observed;

s5, chassis load running test on different road surfaces: after the driving test on the bumpy road surface is completed in the step S4 under the no-load state of the new energy automobile chassis, the hanging bag 15 is put down and pressed into the upper part of the new energy automobile chassis, so that the new energy automobile chassis in the driving process is loaded, the pushing frame 407 is driven by each second servo motor 406 to slide left and right, so that the rollers 4 supported under each tire of the new energy automobile chassis slide synchronously, the bumpy wheels 408, the slag wheels 409 and the light pulleys 410 on the rollers 4 are sequentially and synchronously replaced, the new energy automobile chassis is simulated in the load state to drive on different road surfaces, and the driving states of the new energy automobile chassis on different road surfaces under the load state are observed;

s6, bending test in the chassis driving process: in the running test process of the new energy automobile on different road surfaces under the chassis load state in the step S5, the servo motor 17 drives the slide block 12 to slide left and right, so that the hanging bag 15 moves to the middle position of the new energy automobile chassis, the bearing block suspended in the bag 15 is pressed into the middle position of the new energy automobile chassis through the suspension frame 14, the middle position of the new energy automobile chassis is pressed in by the gravity of the bearing block, so that the left side and the right side of the new energy automobile chassis are slightly bent upwards after the middle part of the new energy automobile chassis is stressed, the middle part of the top surface of the bottom supporting plate 2 is designed into a downward-sunken arc-shaped surface, the direction of the downward-sunken arc-shaped surface is consistent with the direction of bending of the left side and the right side of the new energy automobile chassis, and the bending resistance of the new energy automobile chassis is reduced by matching with the sliding connection of the sliding base 21 and the first slide way 201, so that the bending generated in the running process of the new energy automobile chassis under the load state can be conveniently observed manually;

s7, inclination test in the chassis driving process: in the running test process on different road surfaces under the chassis load state of the new energy automobile in the step S5, the first electric push rods 3 on one side of the new energy automobile chassis on the top surface of the bottom supporting plate 2 are synchronously lifted, so that the drum bottom supporting seats 304 at the bottoms of tires on two sides of the new energy automobile chassis are different in height, the automobile body is inclined in the running process under the loading state of the new energy automobile chassis, the running state on different ground under the inclined state of the automobile body is observed, through the hinge 303 arranged between the bottom support plate 305 and the roller bottom support base 304, the plurality of support springs 302 symmetrically arranged in front and back of the hinge 303 can control the roller bottom support base 304 to be adaptively inclined according to the inclined height of the vehicle body, the road condition that the tires of the new energy automobile chassis run on the inclined ground can be simulated more truly, and the state generated in the running process of the new energy automobile chassis on the inclined road surface in the inclined state can be observed manually.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A new energy automobile chassis physical property testing system is used for carrying out load physical property testing on a new energy automobile chassis before delivery, and is characterized by comprising a base, wherein the base is fixed on the ground, an arc-shaped bent bottom supporting plate is fixedly arranged at the top end of the base, the middle part of the top surface of the bottom supporting plate is an arc-shaped surface which is sunken downwards, four first slide ways are symmetrically arranged on the top surface of the bottom supporting plate, a sliding base is connected in each first slide way in a sliding manner, a roller bottom supporting seat is arranged at the top end of each sliding base, two rollers are fixedly arranged at the top end of each roller bottom supporting seat, the two rollers are arranged in parallel, a through sliding hole is formed in the middle part of each roller, and the sliding hole in the middle part of each roller is connected to a sliding tooth in a sliding fit manner, the two ends of each sliding tooth are rotatably connected to a roller support through bearings, the bottom end of each roller support is fixed to the top end of a roller bottom supporting seat, an electric motor is fixedly mounted at the top end of the roller bottom supporting seat, an output shaft extends forwards from the electric motor, a first belt wheel is fixedly mounted at the top end of the output shaft of the electric motor, a second belt wheel is fixedly mounted at one end of each sliding tooth, and the second belt wheel and the first belt wheel are in V-belt transmission;

2. The new energy automobile chassis physical performance test system according to claim 1, characterized in that: the top ends of the first electric push rods at the bottom end of each roller bottom supporting seat are fixedly arranged on the bottom supporting seat together, a hinge is arranged between the bottom supporting seat and the roller bottom supporting seat, a plurality of supporting springs are symmetrically arranged between the top end of the bottom supporting seat and the roller bottom supporting seat, and the supporting springs are symmetrically arranged between the top end of the bottom supporting seat and the roller bottom supporting seat along the hinge in a front-back mode.

3. The new energy automobile chassis physical performance test system according to claim 1, characterized in that: the drum is of a cylindrical structure, the drum is provided with three different gear teeth of surface structures of the jolting wheel, the slag wheel and the smooth wheel which are axially superposed, the outer circular surface of the jolting wheel is large in gear tooth interval, tires of the automobile chassis can shake in a high amplitude in a driving process, the gear tooth interval of the outer circular surface of the slag wheel is moderate, the wheels of the automobile chassis can shake in a low amplitude and high frequency in the driving process, and the surface of the smooth wheel is a plane.

4. The new energy automobile chassis physical performance test system according to claim 3, characterized in that: the roller further comprises sliding frames, sliding grooves, racks, worm gears, worms, a second servo motor and a pushing frame, wherein the middle parts of roller supports at two ends of each roller are provided with through sliding holes, the sliding holes in the middle parts of the roller supports are connected with the racks in a sliding fit mode, the sliding grooves are symmetrically formed in the front side and the rear side of the racks, sliding frames in sliding fit with the sliding grooves are symmetrically and fixedly arranged on the front side and the rear side of the inner wall of the sliding hole in the middle part of the roller support, the racks are in sliding connection with the sliding grooves through the sliding frames in the sliding holes to realize stable sliding, the second servo motor is fixedly arranged at the top end of a roller bottom supporting seat, an output shaft extends forwards from the second servo motor, the top end of the output shaft of the second servo motor is fixedly provided with the worm, the worm is in meshed connection with;

5. The new energy automobile chassis physical performance test system according to claim 3, characterized in that: the pushing frame comprises steel balls, a plurality of rolling ball grooves are formed in the side wall of the pushing frame, which faces the end face of the roller, at equal intervals, steel balls are rotatably connected in each rolling ball groove, and the steel balls on the side wall of the pushing frame are in rolling contact with the end face of the roller.

6. The new energy automobile chassis physical performance test system according to claim 1, characterized in that: the top middle part fixed mounting of end supporting disk has second electric putter, second electric putter upwards stretches out there is the push rod, the top fixed mounting of push rod has the lifting block, the top surface of lifting block is laminated with vehicle chassis's bottom surface mutually.

7. A new energy automobile chassis physical performance testing method is characterized in that the new energy automobile chassis physical performance testing method is mainly completed by matching with the new energy automobile chassis physical performance testing system of any one of claims 2, 4, 5 or 6, and the new energy automobile chassis physical performance testing method mainly comprises the following steps: