CN117705469B - Tire detecting apparatus - Google Patents
Tire detecting apparatus Download PDFInfo
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- CN117705469B CN117705469B CN202410166842.8A CN202410166842A CN117705469B CN 117705469 B CN117705469 B CN 117705469B CN 202410166842 A CN202410166842 A CN 202410166842A CN 117705469 B CN117705469 B CN 117705469B
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- 238000012360 testing method Methods 0.000 claims abstract description 73
- 230000002093 peripheral effect Effects 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000003068 static effect Effects 0.000 claims description 26
- 238000007664 blowing Methods 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 10
- 238000005096 rolling process Methods 0.000 description 10
- 238000012986 modification Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 230000005484 gravity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The invention relates to the technical field of tire detection, and discloses tire detection equipment, which comprises: the device comprises a motor, a flywheel, a loading mechanism, a tire mounting mechanism, a base and a brake assembly; the flywheel is arranged on the base, the motor is in transmission connection with the flywheel, the peripheral wall of the flywheel is limited to be a test pavement, the loading mechanism comprises a force measuring device and a loading assembly, the tire mounting mechanism comprises a brake assembly, a tire to be tested and a tire shaft, the tire to be tested is coaxially arranged at one end of the tire shaft, and the brake assembly is coaxially arranged at the other end of the tire shaft; the loading assembly is connected with the tire shaft and used for controlling the tire to be tested to act on the test pavement under the preset load, the force measuring device is arranged on the loading assembly and used for controlling and testing the load of the loading assembly, the flywheel and the tire to be tested are both provided with the rotating speed sensor, and the loading assembly or the tire shaft is also provided with the displacement sensor. The invention can apply different braking moment actions to the tire and simulate the characteristics of the tire such as sliding under the actual braking working condition.
Description
Technical Field
The invention relates to the technical field of tire detection, in particular to tire detection equipment.
Background
The tribomechanical properties of a tire are important indicators for measuring the performance of the tire, wherein the tire slip rate, also called slip rate, is the proportion of the slip component in the movement of the wheel, generally denoted by S, that occurs when the tire emits traction or braking forces, and relative movement occurs between the tire and the ground.
At present, in the prior art, a simulated road surface is used for driving a test tire to rotate, the rotational speed and the road surface speed of the tire are respectively collected, and the difference value of the travelling distance between the tire and the road surface during the period from unsteady state to steady state of the tire is calculated, so that the slip ratio is calculated. However, the test technology cannot effectively simulate the tire slip characteristic under the action of brake intervention at present, and further cannot test the tire slip characteristic under the action of different brake moments.
Disclosure of Invention
The purpose of the invention is that: the tire sliding friction wear detection device is designed, different braking moment effects can be applied to the rotated tire, and the characteristics of the tire sliding and the like under the actual braking working condition can be simulated more truly.
In order to achieve the above object, the present invention provides a tire detecting apparatus comprising: a tire testing apparatus comprising: the device comprises a motor, a flywheel, a loading mechanism, a tire mounting mechanism and a base;
The flywheel is arranged on the base, the motor is in transmission connection with the flywheel so that the flywheel can rotate around the central axis of the flywheel, the peripheral wall of the flywheel is limited to be a test pavement, the loading mechanism comprises a force measuring device and a loading assembly, the tire mounting mechanism comprises a brake assembly, a tire to be tested and a tire shaft, the tire to be tested is coaxially arranged at one end of the tire shaft, and the brake assembly is coaxially arranged at the other end of the tire shaft; the loading assembly is connected with the tire shaft and used for controlling the tire to be tested to act on the test pavement under the preset load, the force measuring device is installed on the loading assembly and used for controlling and testing the load of loading, the flywheel and the tire to be tested are respectively provided with a rotating speed sensor, and the loading assembly or the tire shaft is also provided with a displacement sensor.
Further, the tire mounting mechanism further comprises a fixing support and a torque sensor for testing braking torque, the tire shaft is rotatably arranged on the fixing support in a penetrating mode and located between the tire and the braking assembly, the loading assembly is connected with the tire shaft through the fixing support, one side of the torque sensor is connected with the fixing support, and the other side of the torque sensor is connected with the braking assembly.
Further, tire installation mechanism still includes the support bracket, the support bracket is fixed in on the fixed bolster and face away from one side protrusion of tire that awaits measuring, brake subassembly includes movable disk frock, quiet dish frock, at least one brake movable disk, at least two brake quiet dishes and follows the central axis of tire axle is kept away from the quiet dish protection, brake disc, thrust disk and the brake cylinder that the tire direction that awaits measuring set gradually, wherein each brake movable disk and each brake quiet dish are crisscross to be overlapped and locate on the tire axle, and any the both sides of brake movable disk all are equipped with the brake quiet dish, the brake movable disk passes through the movable disk frock with tire axle circumference fixed connection, the quiet dish frock cover is located each brake quiet dish is last and with each brake quiet dish circumference fixed connection, the periphery wall of quiet dish frock with the support bracket rotates to be connected, the brake cylinder is fixed in on the support bracket and with thrust disk is connected, the thrust disk passes through the thrust bar with the brake disk is connected, the brake movable disk is crossed to the thrust bar the thrust disk is passed through the static bar the thrust disk is connected with axial to the thrust disc is compressed tightly with each brake disk protection spring.
Further, the support bracket covers the periphery of the brake assembly, a ball adjusting seat is arranged on the inner wall of the support bracket, balls are rotatably mounted on the ball adjusting seat, two ends of the static disc tool in the central axis direction of the static disc tool are circumferentially provided with a support slide rail, the static disc tool is rotatably connected with the support bracket through the support slide rail and the balls, and the torque sensor is connected with the brake assembly through the static disc tool.
Further, a heat dissipation hole is formed in the peripheral wall of the static disc tool.
Further, the peripheral wall of the support bracket is provided with a mounting groove and a mounting hole.
Further, the bottom of support bracket has seted up the air and has blown the hole, install on the support bracket inner peripheral wall along the gas blow pipe of tire axle axial extension, the gas blow pipe with the air blows the hole intercommunication, still set up a plurality of orientation on the gas blow pipe the brake moves the dish and the gas blow hole of brake quiet dish.
Further, the inner peripheral wall and the outer peripheral wall of the flywheel are both defined as the test pavement, the loading mechanism further comprises a rotating assembly, the loading assembly is connected with the tire shaft through the rotating assembly, and the rotating assembly can control the tire to be tested on the tire shaft to be switched between the inner peripheral wall of the flywheel and the outer peripheral wall of the flywheel.
Further, the outer peripheral wall of the flywheel is made of steel materials, and the inner peripheral wall of the flywheel is provided with a detachable simulated pavement module.
Further, the base comprises two supporting seats respectively arranged at two sides of the flywheel, and each supporting seat is rotationally connected with the central shaft of the flywheel.
Compared with the prior art, the tire detection equipment provided by the embodiment of the invention has the beneficial effects that:
The tire detection equipment provided by the embodiment of the invention can generate braking torque through the braking component, and the braking component is adjusted to quickly respond to the adjustment of the braking torque according to the actual test requirement; the load of the tire to be tested is controlled and measured by the load measuring device; the sinking amount of the tire to be measured is measured by measuring the action displacement of the loading assembly or the sinking amount of the tire mounting mechanism through the displacement sensor, and the angular speed of the flywheel and the angular speed of the tire to be measured are respectively measured through the flywheel and the rotating speed sensor on the tire to be measured. Recording the acquired data, and calculating the slip rate according to the test purpose.
Drawings
FIG. 1 is an isometric view of a tire to be tested in a tire testing apparatus in accordance with an embodiment of the present invention positioned on an inner peripheral wall of a flywheel;
FIG. 2 is an isometric view of a tire to be tested positioned on the peripheral wall of a flywheel in a tire testing apparatus according to an embodiment of the present invention;
FIG. 3 is an isometric view of a loading mechanism and a tire mounting mechanism in a tire testing apparatus according to an embodiment of the present invention;
FIG. 4 is an isometric view of a support bracket housing around a brake assembly in a tire testing apparatus according to an embodiment of the present invention;
FIG. 5 is an isometric view of a brake assembly in a tire testing apparatus according to an embodiment of the present invention;
FIG. 6 is an isometric view of the interior of a brake assembly in a tire testing apparatus according to an embodiment of the present invention;
Fig. 7 is a perspective cross-sectional view of the tire mounting mechanism in the tire detecting apparatus of the embodiment of the present invention;
FIG. 8 is a plan sectional view of the tire mounting mechanism in the tire detecting apparatus of the embodiment of the present invention;
FIG. 9 is a schematic view of the tire to be tested in the tire testing apparatus of the embodiment of the present invention in the configuration of the inner peripheral wall of the flywheel;
FIG. 10 is a schematic view of the tire to be tested in the tire testing apparatus of the embodiment of the present invention in the configuration of the inner peripheral wall of the flywheel;
In the figure, 1, a flywheel; 11. testing the road surface; 2. a loading mechanism; 21. a force measuring device; 22. loading the assembly; 23. a rotating assembly; 3. a tire mounting mechanism; 31. a brake assembly; 310. a return spring; 311. a movable disc tool; 312. a brake disc; 313. static disc tooling; 3131. supporting the slide rail; 3132. a heat radiation hole; 314. braking a static disc; 315. static disc protection; 316. a brake disc; 317. a thrust plate; 318. a brake cylinder; 319. a thrust rod; 32. a tire to be tested; 33. a tire shaft; 34. a fixed bracket; 35. a torque sensor; 36. a support bracket; 361. a ball adjusting seat; 3611. a ball; 362. a mounting groove; 363. a mounting hole; 364. an air blowing hole; 365. an air blowing pipe; 3651. a blow hole; 4. a base; 41. and a supporting seat.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the present invention are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "connected," "fixed," and the like are used in the present invention in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; the mechanical connection can be realized, and the welding connection can be realized; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The terms "first", "second", etc. are used in the present invention to describe various information, but the information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.
Referring to fig. 1 and 3, a tire detecting apparatus according to an embodiment of the present invention includes: the tire mounting device comprises a motor, a flywheel 1, a loading mechanism 2, a tire mounting mechanism 3 and a base 4;
The flywheel 1 is mounted on the base 4, the motor is in transmission connection with the flywheel 1 so that the flywheel 1 can rotate around the central axis of the flywheel, the peripheral wall of the flywheel 1 is defined as a test pavement 11, the loading mechanism 2 comprises a force measuring device 21 and a loading assembly 22, the tire mounting mechanism 3 comprises a brake assembly 31, a tire 32 to be tested and a tire shaft 33, the tire 32 to be tested is coaxially mounted on one end of the tire shaft 33, and the brake assembly 31 is coaxially mounted on the other end of the tire shaft 33; the loading assembly 22 is connected with the tire shaft 33 to control the tire 32 to be tested to act on the test pavement 11 under a preset load, the force measuring device 21 is installed on the loading assembly 22 to control and test the load of the load, the flywheel 1 and the tire 32 to be tested are respectively provided with a rotation speed sensor, and the loading assembly or the tire shaft 33 is also provided with a displacement sensor.
Wherein, the inner peripheral wall or the outer peripheral wall of the flywheel 1 can simulate a road surface to be used as the test pavement 11, the loading component 22 controls the tire shaft 33, and the tire 32 to be tested arranged on the tire shaft 33 acts on the test pavement 11 of the flywheel 1 under the preset load; the flywheel 1 is driven by the motor to accelerate to rotate, so that the tyre 32 to be tested is driven to rotate, and the brake assembly 31 does not work at the moment; after the flywheel 1 rotates the tyre 32 to be tested to a steady-state running speed, a braking moment is generated through the braking component 31, and the braking component 31 is adjusted to quickly respond to the adjustment of the braking moment according to the actual test requirement; the load magnitude of the loading assembly 22 to the tyre 32 to be tested is controlled and measured through the force measuring device 21; the displacement sensor measures the displacement of the loading assembly 22 or the sinking of the tire mounting mechanism 3 to measure the sinking of the tire 32 to be measured, and the rotational speed sensors on the flywheel 1 and the tire 32 to be measured respectively measure the angular velocity of the flywheel 1 and the angular velocity of the tire 32 to be measured. Recording the acquired data, and calculating the slip rate according to the test purpose.
Referring to fig. 4, in some modifications of the present application, the tire mounting mechanism 3 further includes a fixing bracket 34 and a torque sensor 35 for testing braking torque, the tire shaft 33 is rotatably disposed through the fixing bracket 34 such that the fixing bracket 34 is located between the tire and the braking assembly 31, the loading assembly 22 is connected to the tire shaft 33 through the fixing bracket 34, and one side of the torque sensor 35 is connected to the fixing bracket 34, and the other side is connected to the braking assembly 31.
The torque sensor 35 monitors the braking moment in real time through the braking component 31 during testing, and can quickly respond to the adjustment of the braking moment according to the numerical value of the torque sensor 35 and the testing requirement.
Referring to fig. 5, 6, 7 and 8, in some improvements of the present application, the tire mounting mechanism 3 further includes a support bracket 36, the support bracket 36 is fixed on the fixed bracket 34 and protrudes toward a side facing away from the tire 32 to be tested, the brake assembly 31 includes a rotor tool 311, a stator tool 313, at least one brake rotor 312, at least two brake rotors 314, a rotor protection 315, a brake rotor 316, a thrust disc 317 and a brake cylinder 318 sequentially disposed along a central axis of the tire shaft 33 toward a direction far away from the tire 32 to be tested, wherein each brake rotor 312 and each brake rotor 314 are sleeved on the tire shaft 33 in a staggered manner, both sides of any brake rotor 312 are provided with the brake rotor 314, the brake rotor 312 is fixedly connected with the tire shaft 33 in a circumferential direction by the rotor tool 311, the stator tool 313 is sleeved on each brake rotor 314 and is fixedly connected with each brake rotor 314 in a circumferential direction, an outer circumferential wall 313 of the stator tool 319 is fixedly connected with the support bracket 319 in a circumferential direction facing away from the tire 32 to be tested, the support bracket 316 can be pushed by the support bracket 316, and the thrust rod 317 is further connected with the brake rotor 316 in a compressed manner by the thrust rod 317, and the thrust rod is further pushed by the brake rotor 314.
Specifically, the tire 32 to be tested is fixedly connected with the tire shaft 33 through bolts and keys, the other end of the tire shaft 33 is fixed with the return spring 310, the tire shaft 33 sequentially passes through the fixed support 34, the torque sensor 35 and the static disc tooling 313, the tire and the fixed support 34 are in installation fit through two pairs of tapered roller bearings, the tire shaft 33 and the dynamic disc tooling 311 are circumferentially fixed through keys, and the brake dynamic disc 312 is circumferentially fixed with the dynamic disc tooling 311 through a plurality of built-in keys. The tyre 32 to be tested, the tyre shaft 33, the movable disc tooling 311 and the brake movable disc 312 synchronously rotate or are static. One end of the supporting bracket 36 is fixedly connected with the fixed bracket 34 through a flange and bolts, and the other end is connected with the brake cylinder 318 through bolts so as to support the gravity of the brake assembly 31 and transfer the reverse acting force of the brake cylinder 318. The fixed disc tooling 313 and each brake fixed disc 314 are circumferentially fixed through a plurality of keys arranged on the inner cylinder of the fixed disc tooling 313. When not braked, a gap is reserved between each brake static disc 314 and each brake dynamic disc 312.
During testing, the flywheel 1 is driven by the motor to accelerate to rotate so as to drive the tyre 32 to be tested to rotate, at the moment, the brake movable disc 312 rotates synchronously with the tyre shaft 33 and the tyre 32 to be tested along with the movable disc tool 311, the brake static disc 314 is stationary and is arranged at intervals with the brake movable disc 312, no friction moment is generated between the brake static disc and the brake movable disc, and no brake moment is generated. When the flywheel 1 drives the tyre 32 to be tested to rotate to a steady-state running speed, a braking axial force is applied to the thrust disc 317 by the braking cylinder 318, the thrust disc 317 axially moves the braking static disc 314 to be compressed with the braking dynamic disc 312 by the thrust rod 319, the braking disc 316 and the static disc protection 315 to generate a braking moment, and the return spring 310 is in a compressed state. The pressure of the brake cylinder 318 can be adjusted so as to quickly adjust the braking moment, when braking action is not needed, the brake cylinder 318 works reversely, and meanwhile, the return spring 310 can lead the brake disc 316 to be far away from the brake disc 312 under the elastic action, so that a gap is generated between the brake static disc 314 and the brake disc 312 so as to lose braking action.
In some improvements of the present application, the support bracket 36 is covered on the outer periphery of the brake assembly 31, a ball adjusting seat 361 is provided on the inner wall of the support bracket 36, balls 3611 are rotatably mounted on the ball adjusting seat 361, two ends of the static disc fixture 313 along the central axis direction are circumferentially provided with a support slide rail 3131, the static disc fixture 313 is rotatably connected with the support bracket 36 through the support slide rail 3131 and the balls 3611, and the torque sensor 35 is connected with the brake assembly 31 through the static disc fixture 313.
One end of the torque sensor 35 is fixed with the fixed bracket 34 through a flange and a bolt, the other end of the torque sensor 35 is fixed with the fixed disc tool 313 through the flange and the bolt, and braking torque is transmitted to the torque sensor 35 through the braking fixed disc 314 and the fixed disc tool 313. The supporting slide rail 3131 is in line contact with the ball 3611 through the circular arc surface of the supporting slide rail, so that the gravity of the brake assembly 31 is supported, the influence of the gravity of the brake assembly 31 on the torque input of the torque sensor 35 is avoided, and the torque testing precision is improved. Specifically, the balls 3611 are engaged with a ball adjusting seat 361 provided with a concave spherical surface, the ball adjusting seat 361 is screw-engaged with the support bracket 36, and the supporting force is adjusted and the gravity of the brake assembly 31 is transmitted through screw-engagement.
In some modifications of the application, the peripheral wall of the stationary plate tooling 313 is provided with heat dissipation holes 3132 for heat dissipation of brake heat.
In some modifications of the present application, the peripheral wall of the support bracket 36 is provided with a mounting slot 362 and a mounting hole 363. Under the condition of ensuring the structural strength of the support bracket 36, the mounting grooves 362 and the mounting openings are designed around to form mounting notches, so that the adjustment and the mounting of the internal components are convenient, and the heat dissipation can be more efficiently performed.
In some improvements of the present application, an air blowing hole 364 is formed at the bottom of the support bracket 36, an air blowing pipe 365 extending axially along the tire shaft 33 is mounted on the inner peripheral wall of the support bracket 36, the air blowing pipe 365 is communicated with the air blowing hole 364, and a plurality of air blowing holes 3651 facing the brake disc 312 and the brake static disc 314 are formed on the air blowing pipe 365.
An air blowing hole 364 is provided at the bottom of the support bracket 36 to blow compressed air, and the brake rotor 312 and the brake stator 314 are forcibly cooled by the air blowing holes 3651 to discharge heat from the upper part and the left and right sides of the support bracket 36.
Referring to fig. 2, in some modifications of the present application, the inner peripheral wall and the outer peripheral wall of the flywheel 1 are defined as the test pavement 11, the loading mechanism 2 further includes a rotating assembly 23, the loading assembly 22 and the tire shaft 33 are connected through the rotating assembly 23, and the rotating assembly 23 can control the tire 32 to be tested on the tire shaft 33 to switch between the inner peripheral wall of the flywheel 1 and the outer peripheral wall of the flywheel 1.
The test track surface 11 on the inner peripheral wall or the outer peripheral wall of the flywheel 1 can be selected for testing according to the test requirements. If the test is performed on the inner peripheral wall test pavement 11 of the flywheel 1, the mounted tyre 32 to be tested is rotated to the inner peripheral wall test pavement 11 of the flywheel 1 through the rotating assembly 23; this operation is not required if the test is performed directly on the outer peripheral wall test track surface 11 of the flywheel 1. The switching method of the inner and outer pavement specifically comprises the following steps: the tire 32 to be tested is dismounted, the tire mounting mechanism 3 is rotated by 90 degrees through the rotating assembly 23, the tire mounting mechanism 3 is controlled to move up and down to a designated height through the loading assembly 22, the tire 32 to be tested is mounted, and the tire mounting mechanism 3 is reversely rotated by 90 degrees through the rotating assembly 23, so that switching is realized.
The tire 32 to be tested is applied with a set load through the loading assembly 22 to act on the test pavement 11 of the flywheel 1, specifically the inner peripheral wall simulation test pavement or the outer peripheral wall steel test pavement 11 of the flywheel 1.
In some improvements of the application, the outer peripheral wall of the flywheel 1 is made of steel material, and the inner peripheral wall of the flywheel 1 is provided with a detachable simulated road surface module.
The outer peripheral wall and the inner peripheral wall of the flywheel 1 can simulate the tread of the tire, wherein the inner peripheral wall can be replaced by modules made of different materials, and the modules are used for simulating different tread working conditions of the tire, for example, a common steel tread is used, and the test can be directly carried out on the outer peripheral wall of the flywheel 1. During testing, the simulation road surface module can be installed on the inner peripheral wall of the flywheel 1 according to the requirement for testing, or the simulation road surface module can be directly tested on the outer peripheral steel road surface of the flywheel 1. The loading assembly 22 applies a set load to the tyre 32 to be tested, and the load acts on the test pavement 11 of the flywheel 1, specifically a simulated pavement module mounted on the inner peripheral wall of the flywheel 1 or a steel pavement of the outer peripheral wall.
In some modifications of the application, the base 4 includes two supporting seats 41 disposed on two sides of the flywheel 1, and each supporting seat 41 is rotatably connected to the central shaft of the flywheel 1.
The base 4 is supported by two supporting seats 41 on two sides of the flywheel 1, a force measuring device 21 and a loading oil cylinder are arranged in the loading assembly 22, so that the loading control and the load measurement of the tire are realized, and the switching of the tire on the stations of the outer peripheral wall and the inner peripheral wall of the flywheel 1 is realized through the rotating assembly 23. The tire mounting mechanism 3 is provided with a tire 32 to be tested, a brake assembly 31, a torque sensor 35 and a rotary positioning structure, so as to realize that the tire 32 to be tested is sent to the test pavement 11 on the inner peripheral wall of the flywheel 1, and the brake action is implemented and the brake moment is tested.
The force measuring device 21 is additionally capable of controlling and measuring the load magnitude of the load, and also the X, Y, Z-direction forces, and the Mx, my, mz-direction torques. The friction coefficient and rolling resistance moment can be calculated according to the test purpose through the collected data.
Referring to fig. 9 and 10, a specific test method is as follows:
Tire slip test:
slip ratio s= (w 2*R2-w1*r）*100%/(w2*R2),r=R1 -L)
Wherein R 1 is the radius of the tire 32 to be tested, R 2 is the radius of the flywheel 1, w 1 is the angular velocity of the tire 32 to be tested, w 2 is the angular velocity of the flywheel, L is the sinking amount of the tire 32 to be tested, and R is the rolling radius of the tire 32 to be tested.
The method for testing the friction and wear of the tire comprises the following steps:
according to the actual measurement test requirement, the tire 32 to be tested is braked by locking the brake assembly 31 or dynamically responding to the brake, the brake working condition of the tire 32 to be tested is simulated truly, and the abrasion information of the tire 32 to be tested is measured.
The method for testing the rolling friction coefficient of the tire comprises the following steps:
Rolling friction coefficient u=fx/Fz
The Fx and Fz are load in X, Z directions measured in the rolling and rotating state of the tire 32 to be tested, and the brake component 31 does not generate braking moment on the tire 32 to be tested.
The method for testing the sliding friction coefficient of the tire comprises the following steps:
coefficient of sliding friction u=fx/Fz
After the tire 32 to be tested is rotated to a stable speed, the tire 32 to be tested is tightly locked by the brake assembly 31, at this time, the test pavement 11 of the flywheel 1 and the tire 32 to be tested slide, and Fx and Fz are load in X, Z directions measured when the tire 32 to be tested slides and rotates along the test pavement 11 of the flywheel 1.
The static friction coefficient testing method comprises the following steps:
Coefficient of static friction u=fx/Fz
The tire 32 to be tested is tightly locked through the brake assembly 31, the flywheel 1 is driven to rotate through the motor, when the flywheel 1 and the tire 32 to be tested slide relatively and complete the test, fx is the maximum value measured when the tire 32 to be tested is relatively static to the period of relative sliding, and Fz is the radial load at the corresponding moment.
The tire rolling resistance moment testing method comprises the following steps:
In the free rolling state of the tire 32 to be tested, the My measured by the force measuring device 21 is the rolling resistance moment, and the brake component 31 does not generate the brake moment to the tire 32 to be tested.
The invention tests the slip characteristic and friction characteristic of the tyre by designing a set of tyre detection equipment, the flywheel 1 provided with different pavement modules is used for simulating real pavement working conditions, the tyre 32 to be tested is pressed on the pavement of the flywheel 1 according to set load, the flywheel 1 device is rotated according to set speed to drive the tyre 32 to be tested to rotate, the rotating speeds of the tyre 32 to be tested and the flywheel 1 are collected in real time, braking torque is applied to the rotating tyre 32 to be tested through the hydraulic braking assembly 31, the magnitude of the braking torque is adjusted in real time according to a working condition curve, the action of the braking torque is simulated more truly, and the tyre slip rate under different working conditions and the tyre wear under corresponding working conditions are measured. Meanwhile, the tire can be locked through the hydraulic brake assembly 31, the static friction coefficient is measured, the brake is completely released, and the rolling resistance moment and the dynamic friction coefficient can be measured through the force measuring device 21.
In summary, embodiments of the present invention provide a tire detecting apparatus having the following advantages:
1. The tire braking working condition can be truly simulated, different braking moment effects such as 'spot braking' or locking can be applied to the rotating tire 32 to be tested, and the slip characteristics of the tire under the actual braking working condition can be more truly simulated under the action of different braking tightness and different sizes according to the actual braking working condition, so that the slip characteristics of the tire under various braking or starting working conditions can be more truly tested;
2. The friction coefficients, rolling resistance moment and the wear characteristics of the tire can be completely tested.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (9)
1. A tire testing apparatus, comprising: the device comprises a motor, a flywheel, a loading mechanism, a tire mounting mechanism and a base;
The flywheel is arranged on the base, the motor is in transmission connection with the flywheel so as to enable the flywheel to rotate around the central axis of the flywheel, the peripheral wall of the flywheel is limited to be a test pavement, the loading mechanism comprises a force measuring device and a loading assembly, the tire mounting mechanism comprises a brake assembly, a tire to be tested and a tire shaft, the tire to be tested is coaxially arranged at one end of the tire shaft, and the brake assembly is coaxially arranged at the other end of the tire shaft; the loading assembly is connected with the tire shaft and used for controlling the tire to be tested to act on the test pavement under the preset load, the force measuring device is arranged on the loading assembly and used for controlling and testing the load of the loading assembly, the flywheel and the tire to be tested are respectively provided with a rotating speed sensor, and the loading assembly or the tire shaft is also provided with a displacement sensor;
The inner peripheral wall and the outer peripheral wall of the flywheel are both limited to be the test pavement, the loading mechanism further comprises a rotating assembly, the loading assembly is connected with the tire shaft through the rotating assembly, and the rotating assembly can control the tire to be tested on the tire shaft to be switched between the inner peripheral wall of the flywheel and the outer peripheral wall of the flywheel.
2. The tire testing apparatus of claim 1, wherein the tire mounting mechanism further comprises a mounting bracket and a torque sensor for testing a braking torque, the tire shaft is rotatably disposed through the mounting bracket such that the mounting bracket is positioned between the tire and the braking assembly, the loading assembly is connected to the tire shaft via the mounting bracket, one side of the torque sensor is connected to the mounting bracket, and the other side is connected to the braking assembly.
3. The tire testing apparatus of claim 2, wherein the tire mounting mechanism further comprises a support bracket, the support bracket is fixed on the fixed bracket and protrudes toward one side facing away from the tire to be tested, the brake assembly comprises a movable disc tool, a stationary disc tool, at least one brake movable disc, at least two brake stationary discs and a stationary disc protection, a brake disc, a thrust disc and a brake cylinder which are sequentially arranged along the central axis of the tire shaft in a direction away from the tire to be tested, wherein each brake movable disc and each brake stationary disc are alternately sleeved on the tire shaft, both sides of any brake movable disc are respectively provided with the brake stationary disc, the brake movable disc is fixedly connected with the tire shaft in the circumferential direction through the movable disc tool, the stationary disc tool is sleeved on each brake stationary disc and is fixedly connected with each brake stationary disc in the circumferential direction, the brake cylinder is fixedly connected with the support bracket in the circumferential direction, the thrust cylinder is fixed on the support bracket and is connected with the brake disc through the thrust disc, and the brake cylinder is axially connected with the brake disc through the thrust disc by pushing a reset rod, and the brake disc is axially connected with the brake disc through the brake cylinder.
4. A tyre detection apparatus as claimed in claim 3, wherein the support bracket is provided around the outer periphery of the brake assembly, a ball adjusting seat is provided on the inner wall of the support bracket, balls are rotatably mounted on the ball adjusting seat, two ends of the stationary disc tooling in the central axis direction are circumferentially provided with a support rail, the stationary disc tooling is rotatably connected with the support bracket through the support rail and the balls, and the torque sensor is connected with the brake assembly through the stationary disc tooling.
5. A tyre detection apparatus as claimed in claim 3, wherein said static disc fixture is provided with heat dissipation holes in its peripheral wall.
6. The tire testing apparatus of claim 4, wherein the support bracket has mounting slots and mounting holes in a peripheral wall thereof.
7. The tire detecting apparatus of claim 4, wherein an air blowing hole is provided at the bottom of the support bracket, an air blowing pipe extending axially along the tire shaft is provided at the inner peripheral wall of the support bracket, the air blowing pipe is communicated with the air blowing hole, and a plurality of air blowing holes facing the brake disc and the brake disc are provided on the air blowing pipe.
8. Tyre-inspection apparatus according to claim 1, characterized in that the outer peripheral wall of the flywheel is of steel material and the inner peripheral wall of the flywheel is provided with removable simulated tread modules.
9. Tyre detection device according to any one of claims 1 to 7, wherein said base comprises two supporting seats respectively provided on both sides of said flywheel, each of said supporting seats being in rotational connection with the central axis of said flywheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410166842.8A CN117705469B (en) | 2024-02-06 | 2024-02-06 | Tire detecting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410166842.8A CN117705469B (en) | 2024-02-06 | 2024-02-06 | Tire detecting apparatus |
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| CN117705469A CN117705469A (en) | 2024-03-15 |
| CN117705469B true CN117705469B (en) | 2024-04-19 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475383A (en) * | 1981-04-11 | 1984-10-09 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method and apparatus for testing vehicular wheels |
| DE4136508A1 (en) * | 1991-11-06 | 1993-05-13 | Renk Ag | Motor vehicle test bench with special wheel coupling - has inner section rotating with engine-driven shaft, and stationary outer section for vehicle support |
| JP2000346752A (en) * | 1999-06-07 | 2000-12-15 | Meidensha Corp | Variable apparatus for coefficient of friction in chassis dynamometer |
| CN102004039A (en) * | 2010-10-25 | 2011-04-06 | 江苏大学 | Test jack horse and test method of electric vehicle electromagnetic and frictional brake integrated system |
| CN216646164U (en) * | 2021-12-29 | 2022-05-31 | 青岛海诺泰科检测仪器有限公司 | Rubber high-temperature multi-angle abrasion tester |
| CN116539335A (en) * | 2023-01-16 | 2023-08-04 | 哈尔滨工业大学（威海） | Indoor tire braking performance testing device |
| CN117288499A (en) * | 2023-11-24 | 2023-12-26 | 中国飞机强度研究所 | Lightweight flywheel for ultra-high acceleration test of aviation tire and manufacturing method thereof |
-
2024
- 2024-02-06 CN CN202410166842.8A patent/CN117705469B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475383A (en) * | 1981-04-11 | 1984-10-09 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Method and apparatus for testing vehicular wheels |
| DE4136508A1 (en) * | 1991-11-06 | 1993-05-13 | Renk Ag | Motor vehicle test bench with special wheel coupling - has inner section rotating with engine-driven shaft, and stationary outer section for vehicle support |
| JP2000346752A (en) * | 1999-06-07 | 2000-12-15 | Meidensha Corp | Variable apparatus for coefficient of friction in chassis dynamometer |
| CN102004039A (en) * | 2010-10-25 | 2011-04-06 | 江苏大学 | Test jack horse and test method of electric vehicle electromagnetic and frictional brake integrated system |
| CN216646164U (en) * | 2021-12-29 | 2022-05-31 | 青岛海诺泰科检测仪器有限公司 | Rubber high-temperature multi-angle abrasion tester |
| CN116539335A (en) * | 2023-01-16 | 2023-08-04 | 哈尔滨工业大学（威海） | Indoor tire braking performance testing device |
| CN117288499A (en) * | 2023-11-24 | 2023-12-26 | 中国飞机强度研究所 | Lightweight flywheel for ultra-high acceleration test of aviation tire and manufacturing method thereof |
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| CN117705469A (en) | 2024-03-15 |
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