A wetland grip test facility

Abstract

The present application relates to the technical field of tire grip test, and particularly relates to a wetland grip test facility, which comprises a driving device, a water supply device, a counterweight unit, a moving device, a speed reducer, a first support seat, a rotating shaft, a second support seat, a test cylinder, a road surface simulation belt, a spray head, a first valve and an electric moving platform; the first support seat is installed on the moving end of the electric moving platform; the rotating shaft is rotatably installed on the first support seat, and a clamp is arranged at the front end of the rotating shaft; the test cylinder is rotatably installed on the second support seat through the driving device; a plurality of groups of road surface simulation belts are arranged on the outer side wall of the test cylinder; a plurality of groups of first valves are arranged on a plurality of groups of spray heads; the plurality of groups of spray heads are communicatively arranged on the water supply device; the counterweight unit is arranged on the first support seat, and the counterweight unit is used for adding counterweight to the rotating shaft; the moving device is arranged at the bottom of the second support seat; the wetland grip test facility can conveniently realize a plurality of groups of comparative tests under different wetland working conditions, and improve the overall tire wetland grip performance data acquisition effect.

Description

Technical Field

[0001] This invention relates to the technical field of tire grip testing, and in particular to a wetland grip testing facility. Background Technology

[0002] Tire wet grip is essentially the interfacial friction characteristics between the tire tread rubber and the wet road surface. It relies on the pumping and drainage effect of the tread grooves and the effective contact between the rubber and the road surface to achieve the grip effect. Its performance directly affects the calibration accuracy of vehicle systems such as ABS anti-lock braking, ESP vehicle stability, and TCS traction control. Therefore, accurate and standardized wet grip testing is an important foundation for tire performance optimization and overall vehicle safety performance upgrade.

[0003] Currently, the industry's testing methods for tire wet grip are mainly divided into two categories: outdoor real-vehicle field testing and indoor bench simulation testing. Among them, indoor bench testing mostly uses drum-type and flat-plate test benches in conjunction with environmental chambers to conduct simulation tests, which is the mainstream method for tire wet performance testing. However, existing testing facilities still have technical defects in practical applications.

[0004] For example, the existing equipment patent with announcement number CN218239339U, this utility model, by setting up components such as an installation box, a connecting plate, and a clamping rod, can rotate the connecting shaft to drive the threaded rod to rotate, and the threaded rod to drive the clamping rod to clamp the tire, making the tire more stable during the test and solving the problem of unstable tire clamping in existing tire performance testing devices.

[0005] For example, the patent with the existing technology announcement number CN221883359U solves the problem that when using a testing device to test the wear resistance of tires, tires that do not meet the quality standards will have rubber fragments falling off and splintering outwards due to continuous friction between the tire tread and the testing device during the friction performance test.

[0006] In the use of existing technologies, it has been found that there is a lack of facilities specifically for tire wet grip testing. In actual use, the controllability of environmental parameters is poor, the road surface adaptability is limited, and the accuracy of data collection is insufficient. It is difficult to meet the testing requirements of standardized testing, high data accuracy, and adaptability to multiple scenarios. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a wetland grip testing facility that facilitates multiple comparative tests under different wetland conditions, thereby improving the acquisition of comprehensive tire wetland grip performance data.

[0008] The present invention provides a wetland gripping test facility, comprising a drive device, a water supply device, a counterweight unit, a moving device, a deceleration device, a first support base, a rotating shaft, a second support base, a test cylinder, a road surface simulation strip, a nozzle, a first valve, and an electric moving platform; The first support base is installed on the moving end of the electric mobile platform; The rotating shaft is rotatably mounted on the first support base, and a clamp is provided at the front end of the rotating shaft; The test cylinder is rotatably mounted on the second support base via a drive device; Multiple sets of road surface simulation strips were installed on the outer wall of the test cylinder; Multiple sets of first valves are installed on multiple sets of nozzles; Multiple sets of nozzles are connected and installed on the water supply device; The counterweight unit is mounted on the first support base and is used to add counterweight to the rotating shaft. The moving device is located at the bottom of the second support base, and the moving device is used to drive the second support base to move horizontally. The speed reduction device is mounted on the second support base and is used to reduce the rotation speed of the test cylinder. The sensor acquisition components are installed on the test facility to collect rotational speed data of the shaft and test cylinder, humidity data of the road surface simulation strip, and pressure data between the tire and the road surface simulation strip; The data analysis unit is located on the test facility and is used to receive the detection data from the sensor acquisition group.

[0009] Preferably, the counterweight unit includes an adjustment device, a first rotating seat, a second rotating seat, a first hydraulic cylinder, a counterweight platform, a friction plate, a support plate, a telescopic rod, and a spring; The first rotating seat is fixedly installed on the top of the first support seat; The second rotating seat is slidably mounted on the top of the first support seat; The first hydraulic cylinder is installed on the outer wall of the first support base, and the moving end of the first hydraulic cylinder is connected to the second rotating base; Two sets of counterweight platforms are rotatably mounted on the first rotating seat and the second rotating seat, respectively, and the end of the rotating shaft is concentrically connected to the counterweight platform located on the first rotating seat. The first set of friction plates is installed at the rear end of the outer wall of the counterweight platform located on the first rotating seat, and the second set of friction plates is installed at the front end of the support plate. Multiple sets of telescopic rods are installed on the outer wall of the counterweight platform located on the second rotating seat, and support plates are installed on the moving ends of the multiple sets of telescopic rods. Multiple sets of springs are respectively fitted onto the outside of multiple sets of telescopic rods; The adjustment device is set on the counterweight platform located on the second rotating seat. The adjustment device is used to control and adjust the weight of the counterweight platform. When the test cylinder drives the tire to rotate, the tire drives the counterweight platform on the first rotating seat to rotate, so that the counterweight platform increases the weight on the tire. When the rotation of the test cylinder decelerates, the inertia provided by the counterweight platform to the tire simulates the inertia of the vehicle when decelerating, thereby realizing the grip test of the tire when decelerating on wet ground. The first hydraulic cylinder pushes the second rotating seat to move, so that the two sets of friction plates make frictional contact, thereby driving the rotation between the two sets of counterweight platforms and improving the flexibility of adjusting the size of the tire counterweight.

[0010] Preferably, the adjusting device includes a central cylinder, a partition, a counterweight, a handle, and a through hole; The outer wall of the counterweight platform located on the second rotating seat is provided with a groove, and the central cylinder is located in the middle of the groove; Multiple sets of partitions are circumferentially arranged on the outer wall of the central cylinder and connected to the inner wall of the groove; Multiple sets of counterweights are installed between multiple sets of partitions; Multiple handles are respectively installed on the outer walls of multiple sets of counterweights; Multiple sets of through holes are circumferentially arranged on the central cylinder, and the counterweights are provided with internal threaded holes corresponding to the positions of the through holes. Different numbers of counterweights are slidably installed between multiple sets of partitions, and then bolts are used to pass through the through holes and connect to the internal threaded holes of the counterweights, thereby fixing the counterweights on the counterweight platform. By adjusting the number of counterweights, the weight of the counterweight platform can be adjusted, thereby achieving a flexible adjustment effect of tire rotation counterweight.

[0011] Preferably, the water supply device includes a water tank, a water reservoir, a pump body, a drain pipe, and a second valve; The water tank is installed at the bottom of the outer wall of the second support. Both sets of water tanks are installed on the outer wall of the second support base. An electric heater is connected to the first set of water tanks, and a semiconductor cooler is connected to the second set of water tanks. The two sets of pumps are connected to the two sets of water tanks respectively, and the output ends of the two sets of pumps are connected to the drain pipe through pipelines. The drain pipe is installed on the upper part of the outer wall of the second support, and multiple sets of nozzles are connected to the drain pipe; Two sets of second valves are respectively connected to the output pipelines of the two sets of pumps. Water is drawn from one set of water tanks by one set of pumps and transported to the drain pipe through the pipeline. By controlling the opening of the first valve, the corresponding nozzle sprays water onto the surface of the corresponding road surface simulation strip. By controlling the opening size of the first valve and coordinating with the pump's output power, the water flow on the road surface simulation strip can be controlled and adjusted. The water in the two sets of water tanks is heated or cooled by electric heaters and semiconductor coolers, respectively, so that water at different temperatures can be sprayed onto the road surface simulation strip, thereby improving the diversity of the experiment.

[0012] Preferably, the moving device includes a base, a second hydraulic cylinder, a connecting member, and a limiting member; The second support is horizontally slidably installed on the base; The second hydraulic cylinder is installed on the outer wall of the base; The connector is installed on the moving end of the second hydraulic cylinder, and the connector is slidably installed on the bottom of the second support base; The limiting component is set at the front end of the connector; the connector is moved by the second hydraulic cylinder, so that the connector pushes the second support seat to slide through 505. When the road surface simulation belt contacts and presses the tire, the pressure on the tire is monitored by the sensor acquisition component. When the second hydraulic cylinder pulls the connector, the connector pulls the second support seat back to its original position through the limiting component.

[0013] Preferably, the deceleration device includes a friction ring, a friction block, and a third hydraulic cylinder; The friction ring is mounted on the rotating end of the test cylinder; Two sets of friction blocks are slidably mounted on the second support base; Two sets of third hydraulic cylinders are respectively installed on the outer walls of the two sets of second support seats, and the moving ends of the two sets of third hydraulic cylinders are respectively connected to the two sets of friction blocks; by pushing the two sets of friction blocks to move through the two sets of third hydraulic cylinders, the two sets of friction blocks come into frictional contact with the friction ring, thereby causing the friction ring to decelerate and brake the rotation of the test cylinder.

[0014] Preferably, the drive device includes a first gear, a second gear, and a motor; The first gear is set on the rotating end of the test cylinder; The second gear is rotatably mounted on the outer wall of the second support and meshes with the first gear. The motor is mounted on the outer wall of the second support and connected to the second gear; the motor drives the second gear to rotate, which in turn drives the test cylinder to rotate through meshing with the first gear.

[0015] Preferably, the sensing and acquisition components include a speed sensor, a pressure sensor, and a capacitive water film thickness sensor; Two sets of speed sensors are respectively installed on the outer walls of the first support and the second support, and the two sets of speed sensors are respectively located on the side of the rotating shaft and the test cylinder; The capacitive water film thickness sensor is installed on the outer wall of the road surface simulation strip; The pressure sensor is installed on the outer wall of the connector, and the sensing end of the pressure sensor is in contact with the second support. The rotational speed data of the shaft and the test cylinder are collected by two sets of speed sensors, the surface water film thickness data of the road surface simulation strip is collected by a capacitive water film thickness sensor, and the pressure data of the second support is collected by the pressure sensor.

[0016] Preferably, the data analysis unit includes a data receiving module, a parameter calculation module, a load matching module, a model calibration calculation module, and a result output storage module. The data analysis unit is connected to two sets of speed sensors, pressure sensors, and capacitive water film thickness sensors. The data receiving module is used to receive real-time acquisition signals of rotation speed, humidity, and contact pressure. The parameter calculation module is used to calculate the speed difference and tire slip ratio. The load matching module is used to correlate actual load condition parameters; The model calibration calculation module is used to call the built-in calibration algorithm model; The result output storage module is used to output gripping force values ​​and save test data. By retrieving the measured rotation speed of the shaft and test cylinder, the difference between the two rotation speeds is calculated. The actual slip ratio of the tire is calculated according to the speed difference formula. The current measured contact pressure is bound and the preset actual vehicle load parameters are matched. The slip ratio, vertical load, and roller surface humidity parameters are substituted into the calibration mathematical model. The model is fitted and converted to obtain the wet longitudinal gripping force value of the tire under test.

[0017] Preferably, a water filter is installed between the water tank and the water trough; the water trough recycles the used water, and the water is filtered by the water filter and then transported to the water tank for recycling.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: The tire is fixedly mounted on the front end of the rotating shaft by a clamp. The first support seat is moved horizontally by an electric moving table, so that the tire moves to the side of the road surface simulation strip to be tested. Then, the second support seat is moved towards the tire by a moving device, so that the road surface simulation strip contacts the tire surface and generates a certain pressure to simulate the load pressure of the tire. Subsequently, the drive device drives the test cylinder to rotate, so that the test cylinder drives the tire to rotate by passing through the road surface simulation strip. After the tire rotates, it drives the rotating shaft to rotate. After the rotating shaft rotates, it drives the counterweight unit to rotate, so that the load of the tire and the test cylinder matches the actual vehicle working condition. At this time, the test cylinder drives the tire to rotate at a preset speed. Then, water is delivered to the spray nozzle by a water supply device. The nozzle sprays water onto the surface of a simulated road surface at a corresponding location, forming a water film. Sensors collect data on the rotational speed of the shaft and test cylinder, the humidity of the simulated road surface, and the pressure between the tire and the simulated road surface. The data analysis unit calculates the speed difference and slip ratio between the tire and the test cylinder in real time. Combined with preset vertical loads and a calibration model, the unit automatically calculates the wet longitudinal grip of the tire under test. By sequentially adjusting the nozzle's drainage flow rate, the water film thickness, the test cylinder rotational speed, the shaft counterweight, the pressure between the tire and the simulated road surface, and the contact area between the tire and different simulated road surfaces, the process is repeated to complete multiple sets of comparative tests under different wetland conditions, obtaining comprehensive data on the tire's wet grip performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the isometric structure of the present invention; Figure 2 This is a partial isometric structural diagram showing the connection between the first support and the rotating shaft, etc. Figure 3 This is a partial isometric structural diagram of the connection between the friction plate and the support plate, etc. Figure 4 This is a partial isometric structural diagram of the connection between the central cylinder and the partition plate, etc. Figure 5 This is a partial isometric structural diagram of the connection between the nozzle and the drain pipe, etc. Figure 6 This is a partial isometric structural diagram of the connection between the first support base and the electric moving platform, etc. Figure 7 This is a partial isometric structural diagram of the connection between the second hydraulic cylinder and connecting parts, etc. Figure 8 This is a partial isometric structural diagram of the connection between the test cylinder and the friction ring, etc. Figure 9 This is a partial isometric structural diagram of the connection between the first support seat and the first rotating seat, etc. Figure 10 This is a schematic diagram of the data analysis unit.

[0020] The attached diagram is labeled as follows: 101, First support base; 102, Rotating shaft; 103, Second support base; 104, Test cylinder; 105, Road surface simulation strip; 106, Nozzle; 107, First valve; 108, Electric moving platform; 201, First rotating seat; 202, Second rotating seat; 203, First hydraulic cylinder; 204, Counterweight platform; 205, Friction plate; 206, Support plate; 207, Telescopic rod; 208, Spring; 301, Central cylinder; 302, Partition plate; 303, Counterweight block; 304. Handle; 305. Through hole; 401. Water tank; 402. Water reservoir; 403. Pump body; 404. Drain pipe; 405. Second valve; 501. Base; 502. Second cylinder; 503. Connector; 504. Limiting component; 601. Friction ring; 602. Friction block; 603. Third cylinder; 701. First gear; 702. Second gear; 703. Motor; 801. Speed ​​sensor; 802. Pressure sensor; 803. Capacitive water film thickness sensor. Detailed Implementation

[0021] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0022] Example 1 like Figures 1 to 10 As shown, a wetland gripping test facility of the present invention includes a drive device, a water supply device, a counterweight unit, a moving device, a deceleration device, a first support base 101, a rotating shaft 102, a second support base 103, a test cylinder 104, a road surface simulation strip 105, a nozzle 106, a first valve 107, and an electric moving platform 108. The first support base 101 is installed on the moving end of the electric mobile platform 108; The rotating shaft 102 is rotatably mounted on the first support 101, and a clamp is provided at the front end of the rotating shaft 102; The test cylinder 104 is rotatably mounted on the second support base 103 via a drive device; Multiple sets of road surface simulation strips 105 are set on the outer wall of the test cylinder 104; Multiple sets of first valves 107 are installed on multiple sets of nozzles 106; Multiple sets of nozzles 106 are connected and installed on the water supply device; The counterweight unit is mounted on the first support 101 and is used to add counterweight to the rotating shaft 102. The moving device is located at the bottom of the second support 103, and the moving device is used to drive the second support 103 to move horizontally. The deceleration device is installed on the second support 103 and is used to reduce the rotation speed of the test cylinder 104. The sensor acquisition component is installed on the test facility to collect rotational speed data of the shaft 102 and the test cylinder 104, humidity data of the road surface simulation belt 105, and pressure data between the tire and the road surface simulation belt 105. The data analysis unit is installed on the test facility to receive the detection data from the sensor acquisition group; The counterweight unit includes an adjustment device, a first rotating seat 201, a second rotating seat 202, a first hydraulic cylinder 203, a counterweight platform 204, a friction plate 205, a support plate 206, a telescopic rod 207, and a spring 208. The first rotating seat 201 is fixedly installed on the top of the first support seat 101; The second rotating seat 202 is slidably mounted on the top of the first support seat 101; The first hydraulic cylinder 203 is installed on the outer wall of the first support base 101, and the moving end of the first hydraulic cylinder 203 is connected to the second rotating base 202. Two sets of counterweight platforms 204 are rotatably mounted on the first rotating seat 201 and the second rotating seat 202 respectively, and the end of the rotating shaft 102 is concentrically connected to the counterweight platform 204 located on the first rotating seat 201. The first set of friction plates 205 is installed on the rear end of the outer wall of the counterweight platform 204 located on the first rotating seat 201, and the second set of friction plates 205 is installed on the front end of the support plate 206. Multiple sets of telescopic rods 207 are installed on the outer wall of the counterweight platform 204 located on the second rotating seat 202, and the support plate 206 is installed on the moving end of the multiple sets of telescopic rods 207. Multiple sets of springs 208 are respectively fitted onto the outside of multiple sets of telescopic rods 207; The adjustment device is installed on the counterweight platform 204 located on the second rotating seat 202. The adjustment device is used to control and adjust the weight of the counterweight platform 204. In this embodiment, the tire is fixedly mounted on the front end of the rotating shaft 102 using a clamp. The electric moving platform 108 drives the first support base 101 to move horizontally, moving the tire to the side of the simulated road surface 105 to be tested. Then, a moving device drives the second support base 103 towards the tire, causing the simulated road surface 105 to contact the tire surface and generate pressure to simulate the tire's load pressure. Subsequently, a drive device rotates the test cylinder 104, causing the test cylinder 104 to rotate the tire via the simulated road surface 105. The tire's rotation drives the rotating shaft 102 to rotate, which in turn drives the counterweight unit to rotate, matching the load on the tire and the test cylinder 104 to the actual vehicle operating conditions. At this time, the test cylinder 104 drives the tire to rotate at a preset speed. Water is then supplied to the nozzle 106 via a water supply device. The nozzle 106 sprays water onto the surface of the road surface simulation strip 105 at the corresponding location to form a water film. The sensor acquisition component collects the rotational speed data of the shaft 102 and the test cylinder 104, the humidity data of the road surface simulation strip 105, and the pressure data between the tire and the road surface simulation strip 105. The data analysis unit calculates the rotational speed difference and slip ratio between the tire and the test cylinder 104 in real time. Combined with the preset vertical load and calibration model, the wet longitudinal grip of the tire under test is automatically calculated. By adjusting the drainage flow rate of the nozzle 106, the water film thickness, the rotational speed of the test cylinder 104, the counterweight of the shaft 102, the pressure between the tire and the road surface simulation strip 105, and the contact between the tire and different road surface simulation strips 105, the steps are repeated to complete multiple sets of comparative tests under different wet conditions and obtain comprehensive tire wet grip performance data. The technical effects of this embodiment include: 1. It realizes automated control of tire wet grip test, and can quickly adjust the contact position and pressure between the tire and the simulated road surface through the coordinated work of electric moving platform and moving device; 2. The counterweight unit, through the combination of an adjustable counterweight platform and friction plates, can accurately simulate the inertial effects under different vehicle loads and deceleration conditions, thus improving the authenticity and reliability of the test data. 3. Compared with the fixed counterweight or simple loading method in the prior art, this embodiment adopts a double counterweight platform structure and controls the engagement and disengagement of friction plates by hydraulic cylinder, realizing the dynamic switching of counterweight state, which solves the technical problem that traditional test devices cannot simulate the change of inertia during deceleration.

[0023] Example 2 Based on Example 1, such as Figures 1 to 10 As shown, a wetland gripping force testing facility of the present invention includes an adjustment device comprising a central cylinder 301, a partition 302, a counterweight 303, a handle 304, and a through hole 305. The outer wall of the counterweight platform 204 located on the second rotating seat 202 is provided with a groove, and the central cylinder 301 is located in the middle of the groove; Multiple sets of partitions 302 are circumferentially arranged on the outer wall of the central cylinder 301 and connected to the inner wall of the groove; Multiple sets of counterweights 303 are respectively installed between multiple sets of partitions 302; Multiple handles 304 are respectively installed on the outer side wall of multiple counterweights 303; Multiple sets of through holes 305 are circumferentially arranged on the central cylinder 301, and the counterweight 303 is provided with internal threaded holes corresponding to the positions of the through holes 305; The water supply device includes a water tank 401, a water reservoir 402, a pump body 403, a drain pipe 404, and a second valve 405; Water tank 401 is installed at the bottom of the outer wall of the second support 103; Both sets of water tanks 402 are installed on the outer wall of the second support 103. An electric heater is connected to the first set of water tanks 402, and a semiconductor cooler is connected to the second set of water tanks 402. Two sets of pump bodies 403 are respectively connected to two sets of water tanks 402, and the output ends of the two sets of pump bodies 403 are connected to the drain pipe 404 through pipelines. The drain pipe 404 is installed on the upper part of the outer wall of the second support 103, and multiple sets of nozzles 106 are connected to the drain pipe 404. Two sets of second valves 405 are respectively connected to the output end pipelines of the two sets of pump bodies 403; The moving device includes a base 501, a second hydraulic cylinder 502, a connecting member 503, and a limiting member 504; The second support 103 is horizontally slidably mounted on the base 501; The second hydraulic cylinder 502 is installed on the outer wall of the base 501; The connector 503 is installed on the moving end of the second cylinder 502, and the connector 503 is slidably installed on the bottom of the second support base 103; The limiting component 504 is located at the front end of the connector 503; The speed reduction device includes a friction ring 601, a friction block 602, and a third hydraulic cylinder 603; The friction ring 601 is disposed on the rotating end of the test cylinder 104; Two sets of friction blocks 602 are slidably mounted on the second support base 103 respectively; Two sets of third hydraulic cylinders 603 are respectively installed on the outer side walls of two sets of second support seats 103, and the moving ends of the two sets of third hydraulic cylinders 603 are respectively connected to two sets of friction blocks 602. The drive unit includes a first gear 701, a second gear 702, and a motor 703; The first gear 701 is mounted on the rotating end of the test cylinder 104; The second gear 702 is rotatably mounted on the outer wall of the second support 103 and meshes with the first gear 701. The motor 703 is mounted on the outer wall of the second support 103 and connected to the second gear 702; The sensing and acquisition components include a speed sensor 801, a pressure sensor 802, and a capacitive water film thickness sensor 803; Two sets of speed sensors 801 are respectively installed on the outer walls of the first support 101 and the second support 103, and the two sets of speed sensors 801 are respectively located on the side of the rotating shaft 102 and the test cylinder 104. The capacitive water film thickness sensor 803 is installed on the outer wall of the road surface simulation strip 105; The pressure sensor 802 is mounted on the outer wall of the connector 503, and the sensing end of the pressure sensor 802 is in contact with the second support 103. The data analysis unit includes a data receiving module, a parameter calculation module, a load matching module, a model calibration calculation module, and a result output and storage module. The data analysis unit is connected to two sets of speed sensors 801, pressure sensors 802, and capacitive water film thickness sensors 803. The data receiving module is used to receive real-time acquisition signals of rotation speed, humidity, and contact pressure. The parameter calculation module is used to calculate the speed difference and tire slip ratio. The load matching module is used to correlate actual load condition parameters; The model calibration calculation module is used to call the built-in calibration algorithm model; The result output storage module is used to output the gripping force value and save the test data. A water filter is installed between the water tank 402 and the water trough 401; In this embodiment, when the test cylinder 104 drives the tire to rotate, the tire drives the counterweight platform 204 on the first rotating seat 201 to rotate, so that the counterweight platform 204 increases the counterweight on the rotation of the tire. When the rotation of the test cylinder 104 decelerates, the inertia provided by the counterweight platform 204 to the tire is used to simulate the inertia of the vehicle when decelerating, thereby realizing the grip test of the tire when decelerating on wet ground. The first cylinder 203 pushes the second rotating seat 202 to move, so that the two sets of friction plates 205 make friction contact, thereby transmitting rotation between the two sets of counterweight platforms 204, improving the flexibility of adjusting the size of the tire counterweight. Different numbers of counterweight blocks 303 are slidably installed between multiple sets of partitions 302, and then bolts are used to pass through the through holes 305 and connect to the internal thread holes of the counterweight blocks 303, thereby fixing the counterweight blocks 303 on the counterweight platform 204. By adjusting the number of counterweight blocks 303, the weight of the counterweight platform 204 is adjusted, thereby realizing the flexible adjustment effect of tire rotation counterweight. The technical effects of this embodiment include: 1. The adjustment device adopts a modular counterweight design, which allows for flexible adjustment of the counterweight size through quick assembly and disassembly with bolts, adapting to the simulation needs of different vehicle models and working conditions; 2. The water supply device integrates heating and cooling functions, which can simulate wetland environments under different temperature conditions, significantly expanding the diversity of experiments; 3. The moving device achieves bidirectional push-pull control through the combination of connectors and limiting components, and forms a closed-loop pressure regulation with the pressure sensor, which improves the control accuracy of contact pressure; 4. Compared with the single braking method in the prior art, the deceleration device in this embodiment adopts a symmetrical arrangement structure of double friction blocks, which provides smooth braking and good heat dissipation performance. 5. The cooperation between the sensor acquisition component and the data analysis unit realizes a fully automated process from signal acquisition to model calculation, which solves the problems of large errors in manual reading and low data processing efficiency in traditional experiments in a non-obvious way. It should be noted that: for exposed moving parts such as the first gear 701 and the second gear 702, protective covers are provided on their outer sides to prevent foreign objects from entering and personnel from accidentally touching them; For electrical components such as speed sensor 801, pressure sensor 802, capacitive water film thickness sensor 803, and junction boxes for motor 703, all are designed with IP65 or higher protection rating and equipped with waterproof sealed joints; the wiring and control schemes for electrical equipment adopt conventional PLC centralized control or distributed I / O control in this field, and the specific wiring connections and control logic are configured by those skilled in the art according to actual needs based on the structure shown in the attached drawings, without the need for creative labor.

[0024] As an alternative, the first cylinder 203 in the counterweight unit can be replaced by an electric push rod or a lead screw mechanism to achieve more precise position control; As an alternative, the combination of pump body 403 and first valve 107 in the water supply device can be replaced by a proportional flow valve group to achieve more linear water film thickness adjustment; This invention discloses a wetland grip testing facility. During operation, a tire is fixed to the front end of a rotating shaft 102 using clamps. An electric moving platform 108 drives a first support base 101 to move horizontally, moving the tire to the side of a simulated road surface strip 105 to be tested. Then, a moving device drives a second support base 103 to move towards the tire, causing the simulated road surface strip 105 to contact the tire surface and generate pressure to simulate the tire's load pressure. Subsequently, a drive device rotates a test cylinder 104, causing the test cylinder 104 to rotate the tire via the simulated road surface strip 105. The tire's rotation drives the rotating shaft 102 to rotate, which in turn drives the counterweight unit to rotate, matching the load on the tire and test cylinder 104 to the actual vehicle operating conditions. At this time, the test cylinder 104 drives the tire to rotate at a preset speed. Water is then supplied via a water supply device. The water is delivered to the nozzle 106, which sprays water onto the surface of the simulated road surface 105 at the corresponding location to form a water film. The sensor acquisition component collects the rotational speed data of the shaft 102 and the test cylinder 104, the humidity data of the simulated road surface 105, and the pressure data between the tire and the simulated road surface 105. The data analysis unit calculates the rotational speed difference and slip ratio between the tire and the test cylinder 104 in real time. Combined with the preset vertical load and calibration model, the wet longitudinal grip of the tire under test is automatically calculated. By adjusting the drainage flow rate of the nozzle 106, the water film thickness, the rotational speed of the test cylinder 104, the counterweight of the shaft 102, the pressure between the tire and the simulated road surface 105, and the contact between the tire and different simulated road surface 105, the steps are repeated to complete multiple sets of comparative tests under different wet conditions and obtain comprehensive data on the tire's wet grip performance.

[0025] The electric moving platform 108, first hydraulic cylinder 203, pump body 403, second hydraulic cylinder 502, third hydraulic cylinder 603, motor 703, speed sensor 801, pressure sensor 802, and capacitive water film thickness sensor 803 of the wetland gripping test facility of the present invention are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0026] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A wetland gripping force testing facility, characterized in that, It includes a drive unit, a water supply unit, a counterweight unit, a moving device, a speed reduction device, a first support base (101), a rotating shaft (102), a second support base (103), a test cylinder (104), a road surface simulation strip (105), a nozzle (106), a first valve (107), and an electric moving platform (108). The first support base (101) is installed on the moving end of the electric mobile platform (108); The rotating shaft (102) is rotatably mounted on the first support base (101), and a clamp is provided at the front end of the rotating shaft (102); The test cylinder (104) is rotatably mounted on the second support (103) via a drive device; Multiple sets of road surface simulation strips (105) are set on the outer wall of the test cylinder (104); Multiple sets of first valves (107) are installed on multiple sets of nozzles (106); Multiple sets of nozzles (106) are connected and installed on the water supply device; The counterweight unit is set on the first support (101) and is used to add counterweight to the rotating shaft (102); The moving device is located at the bottom of the second support (103) and is used to drive the second support (103) to move horizontally; The deceleration device is installed on the second support (103) and is used to reduce the rotational speed of the test cylinder (104); The sensor acquisition component is installed on the test facility to collect the rotational speed data of the shaft (102) and the test cylinder (104), the humidity data of the road surface simulation strip (105), and the pressure data between the tire and the road surface simulation strip (105). The data analysis unit is located on the test facility and is used to receive the detection data from the sensor acquisition group.

2. The wetland gripping test facility as described in claim 1, characterized in that, The counterweight unit includes an adjustment device, a first rotating seat (201), a second rotating seat (202), a first hydraulic cylinder (203), a counterweight platform (204), a friction plate (205), a support plate (206), a telescopic rod (207), and a spring (208). The first rotating seat (201) is fixedly installed on the top of the first support seat (101); The second rotating seat (202) is slidably mounted on the top of the first support seat (101); The first hydraulic cylinder (203) is installed on the outer wall of the first support base (101), and the moving end of the first hydraulic cylinder (203) is connected to the second rotating base (202); Two sets of counterweight platforms (204) are rotatably mounted on the first rotating seat (201) and the second rotating seat (202) respectively, and the end of the rotating shaft (102) is concentrically connected to the counterweight platform (204) located on the first rotating seat (201); The first set of friction plates (205) is installed on the rear end of the outer wall of the counterweight platform (204) located on the first rotating seat (201), and the second set of friction plates (205) is installed on the front end of the support plate (206); Multiple sets of telescopic rods (207) are installed on the outer wall of the counterweight platform (204) located on the second rotating seat (202), and the support plate (206) is installed on the moving end of the multiple sets of telescopic rods (207); Multiple sets of springs (208) are respectively fitted onto the outside of multiple sets of telescopic rods (207); The adjustment device is set on the counterweight platform (204) located on the second rotating seat (202), and the adjustment device is used to control and adjust the weight of the counterweight platform (204).

3. The wetland gripping test facility as described in claim 2, characterized in that, The adjustment device includes a central cylinder (301), a partition (302), a counterweight (303), a handle (304), and a through hole (305); The outer wall of the counterweight platform (204) located on the second rotating seat (202) is provided with a groove, and the central cylinder (301) is located in the middle of the groove; Multiple sets of partitions (302) are circumferentially arranged on the outer wall of the central cylinder (301) and connected to the inner wall of the groove; Multiple sets of counterweights (303) are installed between multiple sets of partitions (302); Multiple handles (304) are respectively installed on the outer walls of multiple counterweights (303); Multiple sets of through holes (305) are circumferentially arranged on the central cylinder (301), and the counterweight (303) is provided with internal threaded holes corresponding to the positions of the through holes (305).

4. The wetland gripping test facility as described in claim 1, characterized in that, The water supply device includes a water tank (401), a water reservoir (402), a pump body (403), a drain pipe (404), and a second valve (405); The water tank (401) is installed at the bottom of the outer wall of the second support (103); Both sets of water tanks (402) are installed on the outer wall of the second support base (103). An electric heater is connected to the first set of water tanks (402), and a semiconductor cooler is connected to the second set of water tanks (402). Two sets of pump bodies (403) are respectively connected to two sets of water tanks (402), and the output ends of the two sets of pump bodies (403) are connected to the drain pipe (404) through pipelines; The drain pipe (404) is installed on the upper part of the outer wall of the second support (103), and multiple sets of nozzles (106) are connected to the drain pipe (404); The two sets of second valves (405) are respectively connected to the output end pipelines of the two sets of pump bodies (403).

5. A wetland gripping test facility as described in claim 1, characterized in that, The moving device includes a base (501), a second hydraulic cylinder (502), a connector (503), and a limiting member (504); The second support (103) is horizontally slidably mounted on the base (501); The second hydraulic cylinder (502) is mounted on the outer wall of the base (501); The connector (503) is installed on the moving end of the second cylinder (502), and the connector (503) is slidably installed on the bottom of the second support (103); The limiting member (504) is located at the front end of the connector (503).

6. The wetland gripping test facility as described in claim 1, characterized in that, The speed reduction device includes a friction ring (601), a friction block (602), and a third hydraulic cylinder (603). The friction ring (601) is disposed on the rotating end of the test cylinder (104); Two sets of friction blocks (602) are slidably mounted on the second support base (103); Two sets of third hydraulic cylinders (603) are respectively installed on the outer walls of two sets of second support seats (103), and the moving ends of the two sets of third hydraulic cylinders (603) are respectively connected to two sets of friction blocks (602).

7. The wetland gripping test facility as described in claim 1, characterized in that, The drive unit includes a first gear (701), a second gear (702), and a motor (703); The first gear (701) is set on the rotating end of the test cylinder (104); The second gear (702) is rotatably mounted on the outer wall of the second support (103) and meshes with the first gear (701); The motor (703) is mounted on the outer wall of the second support (103) and connected to the second gear (702).

8. A wetland gripping test facility as described in claim 1, characterized in that, The sensing and acquisition components include a speed sensor (801), a pressure sensor (802), and a capacitive water film thickness sensor (803). Two sets of speed sensors (801) are respectively installed on the outer walls of the first support (101) and the second support (103), and the two sets of speed sensors (801) are respectively located on the side of the rotating shaft (102) and the test cylinder (104); A capacitive water film thickness sensor (803) is installed on the outer wall of the road surface simulation strip (105); The pressure sensor (802) is mounted on the outer wall of the connector (503), and the sensing end of the pressure sensor (802) is in contact with the second support (103).

9. A wetland gripping test facility as described in claim 1, characterized in that, The data analysis unit includes a data receiving module, a parameter calculation module, a load matching module, a model calibration calculation module, and a result output storage module. The data analysis unit is connected to two sets of speed sensors (801), pressure sensors (802), and capacitive water film thickness sensors (803). The data receiving module is used to receive real-time acquisition signals of rotation speed, humidity, and contact pressure. The parameter calculation module is used to calculate the speed difference and tire slip ratio. The load matching module is used to correlate actual load condition parameters; The model calibration calculation module is used to call the built-in calibration algorithm model; The results output storage module is used to output the gripping force value and save the test data.

10. A wetland gripping test facility as described in claim 4, characterized in that, A water filter is installed between the water tank (402) and the water trough (401).

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