CN112945584A

CN112945584A - Tire impact resistance testing device

Info

Publication number: CN112945584A
Application number: CN202110301922.6A
Authority: CN
Inventors: 赵宇驰; 吴炜; 王妍
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-06-11
Anticipated expiration: 2041-03-22
Also published as: CN112945584B

Abstract

The invention provides a tire impact resistance testing device, which comprises a tire fixing device and an impact device, wherein the tire fixing device comprises a side supporting column, a guide column which can simulate the assembly of an actual state and a tire, a deflection mechanism arranged between the side supporting column and the guide column, and a pressurization measuring mechanism which can apply pressure to the tire and measure the pressure; the impact device comprises a cylinder module and an impact module connected with the cylinder module; the deflection mechanism comprises a flange plate component which is arranged between the bottom of the side supporting column and the top of the guide column and can adjust the matching angle; the impact module comprises a boss module or a pit module with the height lower than the radius of the wheel. Among this testing arrangement, the actual assembly form and the part state of whole car of fixed mode simulation of tire, the actual impact condition of vehicle at the operation in-process tire can be simulated to the mode of impact test, and the device overall structure is simple, and is easy and simple to handle, and the controllability is strong, but the experimental result referential that adopts the device to test is strong.

Description

Tire impact resistance testing device

Technical Field

The invention belongs to the field of automobile part testing devices, and relates to a tire testing device.

Background

In the development process of an automobile, the actual use working condition of a consumer needs to be considered in the design of the tire, the damage to the tire caused by the raised steps and the pits on the road surface is very large, the impact resistance of the tire in the working condition needs to be verified in advance in the development of the automobile, and the tire can be guaranteed to resist the impact of a certain number of times so as to guarantee the safety of the consumer.

In order to test the shock resistance of the tire under the working conditions, a whole automobile factory can really test various working conditions after assembling the automobile, the method has good test effect, but the test is carried out after the whole automobile is designed and trial-manufactured and assembled, so that the period is long, and the cost is high. Tire manufacturers and the like also design some racks for performing tire impact tests, but according to the fixed racks and the requirements of impact specifications, all impacts of the tires actually assembled on a certain fixed vehicle cannot be reflected, the limitation is very large, and the test results are not referable to the whole vehicle tests.

The Chinese patent publication No. CN102564720A discloses a composite impact test device for automobile wheels, which comprises a heavy hammer system, a heavy hammer ascending and descending adjusting system, a heavy hammer releasing system, a multi-angle impact support base and the like, wherein the multi-angle impact test can be performed on tires by adjusting the weight, the height and the impact position of the heavy hammer. The utility model discloses a chinese utility model patent that the publication number of authorizing is CN202501971U discloses a tire impact tester, including frame, elevating system, loading mechanism, impact mechanism and loaded mechanism, loaded mechanism include anchor clamps and wait to detect the tire, this testing machine carries out impact test to the tire through making the weight free fall. The above testing devices cannot simulate the actual impact working condition of the vehicle, and the actual fixing mode of the wheels cannot simulate the actual assembly form of the whole vehicle.

Disclosure of Invention

To solve the problems described in the background art, the present invention provides a tire impact resistance testing device.

The tire impact resistance testing device comprises a tire fixing device and an impact device, wherein the tire fixing device comprises a side supporting column, a guide column which can simulate the assembly of an actual state and a tire, a deflection mechanism arranged between the side supporting column and the guide column, and a pressurization measuring mechanism which can apply pressure to the tire and measure the pressure; the impact device comprises a cylinder module and an impact module connected with the cylinder module.

The deflection mechanism comprises a flange plate component which is arranged between the bottom of the side supporting column and the top of the guide column and can adjust the matching angle.

The pressurizing and measuring mechanism comprises a locking disc mechanism for applying pressure to the guide post by moving downwards and a weighing wheel arranged below the tire.

The flange plate assembly comprises a first flange plate and a second flange plate which can be matched at an adjustable angle, the first flange plate is arranged at the bottom of the side supporting column, the second flange plate is arranged at the top of the vertical supporting column, and a rectangular cavity which can be matched with the upper part of the guide column is arranged in the middle of the vertical supporting column.

The locking disc mechanism comprises an operating disc at the top and a threaded rod connected with the middle part of the operating disc; the side support columns are provided with threaded holes, and the threaded rods penetrate through the deflection mechanisms through the threaded holes to be in contact with the top ends of the guide columns.

The middle part and the lower part of the guide post are respectively provided with an upper support frame and a lower mounting support frame which vertically extend towards the same direction; the upper support frame is provided with matching holes connected with the shock absorber level springs, and the lower mounting support frame is provided with two groups of matching holes connected with the triangular arms.

The lower mounting bracket component comprises two groups of mounting plates which are arranged in parallel at intervals, the mounting plates comprise a small triangular mounting plate and a large triangular mounting plate which are arranged on the adjacent surfaces of the guide pillars, and the small triangular mounting plate is arranged below the upper supporting frame.

The air cylinder module comprises an air cylinder and an air storage tank which are connected with each other through an air pipe, and a piston rod of the air cylinder is connected with the impact module.

And the air pipe is provided with an air valve capable of adjusting the air inflow speed.

The impact module comprises a step module or a pit module with the height lower than the radius of the wheel, convex guide rails are arranged at the bottoms of the step module and the pit module, and the convex guide rails are matched with the arranged guide grooves.

The use process of the testing device provided by the invention is as follows: assembling a tire, a matched spring, a damping frame and a triangular arm on a guide post according to the actual part state of the whole vehicle; then the locking disc mechanism is rotated to move downwards, the bottom of the locking disc mechanism is propped against the upper plane of the guide post to enable the guide post to move downwards, the pressure value acted on the tire can be read through weighing of the bottom of the tire, and the pressure value can be set according to the weight of an actual vehicle in the test process; and then adjusting the pressure of high-pressure air in the air storage tank or the opening of an air valve according to the speed requirement of the test, and when the high-pressure air in the air storage tank enters the air cylinder, a piston rod of the air cylinder pushes the step module or the pit module to move along the guide groove to impact the tire.

Compared with the prior art, the mounting mode of the automobile tire simulates the actual assembly form and the part state of the whole automobile, the impact resistance of the wheel in the working condition of the step is simulated and examined by impacting the tire through the step module in the test, and the impact resistance of the wheel in the working condition of the pit is simulated and examined by impacting the tire through the pit module. When the side impact performance of the tire needs to be checked, only the relative angle between the deflection mechanisms such as the flange plate assemblies needs to be adjusted. The impact module can have different impact speeds by adjusting the pressure of high-pressure air in the air storage tank and the speed of air entering the air cylinder, wherein the speed of air entering the air cylinder can be realized by the opening degree of the air valve, so that the impact resistance of tires under different vehicle speed conditions can be simulated. The testing device provided by the invention has the advantages that the tire fixing mode simulates the actual assembly form and the part state of the whole vehicle, the impact testing mode can simulate the actual impact working condition of the tire in the running process of the vehicle, the whole structure of the device is simple, the operation is simple and convenient, the adjustability is strong, and the referential performance of the test result of the test by adopting the device is strong.

Drawings

FIG. 1 is a schematic structural diagram I of a tire impact resistance testing device.

Fig. 2 is a schematic structural diagram II of the tire impact resistance testing apparatus.

Fig. 3 is a schematic structural view of the locking disk mechanism.

Fig. 4 is a schematic structural diagram of the side support columns and the vertical support columns.

Fig. 5 is a schematic structural view of the guide pillar.

Fig. 6 is a schematic structural view of a step module.

Fig. 7 is a schematic structural diagram of a pit module.

Wherein: 1-side support columns; 2-locking the disc mechanism; 3-vertical support columns; 4-guide pillar; 5-vehicle wheels; 6-step module; 7-a cylinder; 8-trachea; 9-an air valve; 10-a gas storage tank; 11-a guide groove; 12-a spring; 13-a shock absorber; 14-a triangular arm; 15-a pit module; 16-weighing; a-a first flange; b-a second flange plate; c-upper plane of guide post; d-an upper support frame; e-lower mounting bracket assembly; e1-small triangle mounting plate; e2-big triangle mounting plate; f-operating the disc; g-a threaded rod; h-cylindrical lower plane; j-rectangular cavity; k-convex rail; an L-threaded hole.

Detailed Description

The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention thereto, so as to facilitate a clear understanding of the invention. The positional relationships described in the embodiments are all in accordance with those shown in the drawings.

The tire impact resistance testing device shown in fig. 1 and 2 is composed of two parts, namely a tire fixing device and an impact device.

As shown in fig. 1, the top of the tire fixing device is fixed on a side wall with enough strength through the side support column 1, after the tire 5 is fixedly installed, the lower bottom surface of the tire 5 is contacted with the ground, and a weight 16 is arranged on the contacted ground. In the embodiment, the side support column 1 is bent in an L shape and is provided with two end faces, one end face of the side support column 1 is fixedly connected with a wall, the other end face of the side support column is provided with a first flange A, the first flange A is matched with a second flange B at the top of the vertical support column 3 in a multi-angle mode through screws and nuts, and the side impact performance of the corresponding angle of the tire 5 can be tested by adjusting the relative angle of matching between the first flange A and the second flange B; in addition, the side supporting columns 1 are provided with threaded holes L at the upper parts of the first flange plates A, and the middle parts of the vertical supporting columns 3 are rectangular cavities J, as shown in fig. 4.

The structure of the guide post 4 is shown in fig. 5, the upper part of the guide post 4 can be inserted into the rectangular cavity J, the middle part of the guide post 4 is provided with an upper support frame D which extends vertically, and the upper support frame D is provided with a matching hole which can be connected with a shock absorber 13 and a spring 15; the bottom of the guide post 4 is provided with a vertically extending lower mounting bracket assembly E, the lower mounting bracket assembly E consists of two sets of mounting plates which are arranged in parallel at intervals, in the embodiment, each set of mounting plates consists of a small triangular mounting plate E1 and a large triangular mounting plate E2 which are arranged on the adjacent surfaces of the guide post 4, and the small triangular mounting plate E1 is positioned below the upper support bracket D; a group of matching holes which can be connected with the triangular arms 14 are arranged between the two small triangular mounting plates E1 and between the two large triangular mounting plates E2.

The structure of locking plate mechanism 2 is as shown in fig. 3, the top is operation disc F, the middle part of operation disc F is provided with the threaded rod G that stretches out, this threaded rod G can cooperate with the screw hole L of side support column 1, can make threaded rod G pass first ring flange A and second ring flange B through screw hole L through rotatory operation disc F for plane H pushes up on the guide pillar upper plane C on 4 tops of guide pillar under the cylinder of threaded rod G bottom, thereby can promote guide pillar 4 and slide down along rectangle cavity J.

As shown in fig. 2, a shock-absorbing mount 13 and a spring 12 associated with the tire 5 are mounted on the bottom of the upper support D, and a triangular arm 14 associated with the tire 5 is mounted on the lower mounting bracket assembly E, so that the tire 5 can be mounted on the tire fixing device in a form of being mounted on a real vehicle. A weighing device 16 is also mounted on the ground at the bottom of the tyre 5, the weighing device 16 being capable of measuring the pressure exerted by the locking disc mechanism 2 on the tyre 5, and the operating disc F of the locking disc mechanism 2 being rotated to set the pressure value on the tyre 5 during the test, according to the pressure generated by the weight of the actual vehicle. In the embodiment, the tire 5 is pressurized by manually rotating the locking disc mechanism 2, and in other embodiments, the tire 5 can be automatically pressurized by adopting a cylinder structure and a controller.

As shown in fig. 1, the impact device is arranged on the ground, the impact device is composed of a cylinder module and an impact module connected with the cylinder module, the impact module is a step module 6, the height of the step module is lower than the radius of the tire 5, the center of the step module 6 and the tire 5 are arranged in a straight line, the structure of the step module 6 is shown in figure 6, the middle part of the bottom of the step module 6 is provided with a convex guide rail K, the convex guide rail K can be matched with a guide groove 11 arranged on the ground, the step module 6 is connected with a piston rod of an air cylinder 7, the air cylinder 7 is fixed on the ground through a screw, the air cylinder 7 is mutually connected with an air storage tank 10 through an air pipe 8, an air valve 9 is also arranged on the air pipe 8, the two groups of air cylinders 7 in the embodiment respectively act on the symmetrical left side and the right side of the step module 6, and the matched track structure ensures that the step module 6 is more stably pushed, it is also possible in practice to push the step module 6 by using one set of cylinders 7 and two sets of rail structures. The pressure of high-pressure air in the air storage tank 10 and the opening degree of the air valve 9, namely the speed of air entering the air cylinder 7, are adjusted, so that the step module 6 can impact the bottom position of the tire 5 at different speeds and retract after passing through the tire 5, the impact resistance of the tire 5 under the step-passing working condition at different vehicle speeds can be tested, and the tire 5 can move up and down through the connected damping frame 13, the spring 12 and the triangular arm 14 in the impact process.

The step module 6 is used for testing the impact resistance of the tire 5 under the over-step working condition, the step module 6 of the impact device can be detached from a piston rod of the air cylinder 7, the pit module 15 shown in fig. 7 is replaced to test the impact resistance of the tire 5 under the over-pit working condition, the height of the pit module 15 is lower than the radius of the tire 5, the center of the pit module 15 and the tire 5 are arranged in a straight line during installation, the pit module 15 can impact the bottom position of the tire 5 at different speeds and retract after passing through the tire 5 through adjustment, so that the impact resistance of the tire 5 under the over-pit working condition at different vehicle speeds can be tested, and the tire 5 can move up and down through the connected damping frame 13, the spring 12 and the triangular arm 14 during impact. In addition, if other test working conditions are required, corresponding test modules can be prepared for testing.

In this embodiment, when the tire is not tested, the guide pillar 4 and the vertical support pillar 3 of the tire impact resistance testing apparatus are not connected and fixed, and in the testing process, the upper portion of the guide pillar 4 is first fitted with the rectangular cavity J in the middle of the vertical support pillar 3, and then the tire 5 is mounted on the guide pillar 4. Of course, the guide post 4 and the vertical support post 3 of the tire impact resistance test device can be screwed by screws in an untested state, the two are pre-matched and fixed by screws, and the pre-fixing screws are detached when the tested tire 5 needs to be installed later.

When the tire 5 is tested by using the tire impact resistance testing device, the tested tire 5 can move up and down after being impacted through the connected damping frame 13, the spring 12 and the triangular arm 14, the height of the step module 6 or the pit module 15 is lower than the radius of the tire 5, and the piston rod of the impacting device air cylinder 7 can push the step module 6 or the pit module 15 to pass through the tire 5 integrally and then retract.

The outer diameter of the tire 5 to be tested was 648 mm; the test pressure is 2.5 atmospheric pressures, and the impact speed is 6 m/s; as shown in fig. 6, the size of the step module 6: the height is 90mm, the width is 90mm, and the length is 500 mm; as shown in fig. 7, the size of the pit module 15: whole width 500mm, whole length 1000mm, the boss height 90mm of both sides, the boss width 90mm of both sides, the pit degree of depth 70mm at middle part, the pit length 700mm at middle part.

The procedure of the impact resistance test of the tire 5 is as follows:

firstly, assembling a tire 5, a matched spring 12, a damping frame 13 and a triangular arm 14 on a guide post 4 according to the actual part state of the whole vehicle;

secondly, rotating an operating disk F of the locking disk mechanism 2, and enabling a cylindrical lower plane D at the bottom of a threaded rod G to be abutted to a guide post upper plane C, so that the guide post 4 slides downwards, and reading the pressure value acting on the tire 5 through a weighing machine 16 at the bottom of the tire 4;

thirdly, adjusting the air valve 9 according to the speed requirement of the test to enable high-pressure air in the air storage tank 10 to enter the air cylinder 7, enabling a piston rod of the air cylinder 7 to push the step module 6 or the pit module 15 to move along the guide groove 11 to impact the tire 5, and enabling the step module 6 or the pit module 15 to be retracted after being integrally pushed through the tire 5.

In the test process, the side impact performance of the corresponding angle of the tire 5 can be tested by adjusting the matching relative angle between the first flange A and the second flange B; the step module 6 or the pit module 15 can have different speeds by adjusting the pressure of high-pressure air in the air storage tank 10 and the opening degree of the air valve 9, namely the speed of air entering the air cylinder 7, so that the impact resistance of the tire 5 at different vehicle speeds can be tested; in addition, if other test working conditions are required, corresponding test modules can be prepared for testing.

Claims

1. The utility model provides a tire anti-impact testing device, includes tire fixing device and impact device, its characterized in that: the tire fixing device comprises a side support column (1), a guide post (4) which can simulate the assembly with a tire (5) in an actual state, a deflection mechanism arranged between the side support column (1) and the guide post (4), and a pressurization measuring mechanism which can apply pressure to the tire (5) and measure the pressure; the impact device comprises a cylinder module and an impact module connected with the cylinder module.

2. A tire impact resistance testing device according to claim 1, wherein: the deflection mechanism comprises a flange plate component which is arranged between the bottom of the side supporting column (1) and the top of the guide column (4) and can adjust the matching angle.

3. A tire impact resistance testing device according to claim 1, wherein: the pressure measuring mechanism comprises a locking disc mechanism (2) for applying pressure to the guide post (4) by moving downwards and a weighing wheel (16) arranged below the tire (5).

4. A tire impact resistance testing device according to claim 2, wherein: the flange plate assembly comprises a first flange plate (A) and a second flange plate (B) which are matched with each other at adjustable angles, the first flange plate (A) is arranged at the bottom of the side supporting column (1), the second flange plate (B) is arranged at the top of the vertical supporting column (3), and a rectangular cavity (J) which can be matched with the upper part of the guide column (4) is formed in the middle of the vertical supporting column (3).

5. A tire impact testing device according to claim 3, wherein: the locking disc mechanism (2) comprises an operation disc (F) at the top and a threaded rod (G) connected with the middle part of the operation disc (F); the side supporting columns (1) are provided with threaded holes (L), and the threaded rods (G) penetrate through the deflection mechanisms through the threaded holes (L) to be in contact with the top ends of the guide columns (4).

6. A tire impact resistance testing device according to claim 1, wherein: the middle part and the lower part of the guide post (4) are respectively provided with an upper support frame (D) and a lower mounting support frame (E) which vertically extend towards the same direction; the upper support frame (D) is provided with matching holes connected with the shock absorber (13) and the spring (15), and the lower mounting support frame assembly is provided with two groups of matching holes connected with the triangular arm (14).

7. A tire impact testing device according to claim 6, wherein: the lower mounting bracket component (E) comprises two sets of mounting plates which are arranged in parallel at intervals, the mounting plates comprise a small triangular mounting plate (E1) and a large triangular mounting plate (E2) which are arranged on the adjacent surfaces of the guide columns (4), and the small triangular mounting plate (E1) is arranged below the upper supporting frame (D).

8. A tire impact resistance testing device according to claim 1, wherein: the air cylinder module comprises an air cylinder (7) and an air storage tank (10) which are connected with each other through an air pipe (8), and a piston rod of the air cylinder (7) is connected with the impact module.

9. A tire impact testing device according to claim 8, wherein: and an air valve (9) capable of adjusting the air inflow speed is arranged on the air pipe (8).

10. A tire impact resistance testing device according to claim 1, wherein: the impact module comprises a step module (6) or a pit module (15) with the height lower than the radius of the wheel (5), the bottoms of the step module (6) and the pit module (15) are provided with convex guide rails (K), and the convex guide rails (K) are matched with the arranged guide grooves (11).