Performance detection device for automobile brake pad

Abstract

The invention discloses a performance detection device for an automobile brake pad in the technical field of automobile brake pad detection. Comprising a controller, a tire, a detection body and two brake pads, a detection groove is formed in the top of the detection body, a water inlet pipe and a water outlet pipe are arranged on the surfaces of the two sides of the detection body respectively, and a first electromagnetic valve and a second electromagnetic valve are arranged on the water inlet pipe and the water outlet pipe respectively and electrically connected with the controller; a rotating assembly and a brake assembly are installed in the detection groove, an air blowing assembly is installed on the inner wall of the detection groove, and a signal assembly is installed at the bottom of the detection groove. The rotating assembly, the brake assembly, the air blowing assembly and the signal assembly are electrically connected with the controller. The device is simple and easy to operate, through cooperative work of the detection body, the water inlet pipe, the water outlet pipe, the rotating assembly and the brake assembly, performance indexes of the brake pad can be detected under the conditions of simulating road surface ponding, muddy road sections and the like, and therefore detection data are more reliable and scientific.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile brake pad detection, in particular to a performance detection device for automobile brake pads. Background Art

[0002] With the continuous increase in the number of cars and the continuous expansion of the automobile consumer market, the automobile brake pad market has also shown a steady growth trend. Automobile brake pads are one of the important components to ensure the safe driving of automobiles, and their performance and quality are directly related to the safety and driving experience of drivers and passengers.

[0003] Therefore, professional inspection of automobile brake pads is indispensable before leaving the factory. By testing the friction coefficient, wear rate, thermal decay rate and other indicators of automobile brake pads, we can understand the braking effect of automobile brake pads under different conditions, so as to choose automobile brake pads that are more suitable for vehicle use needs. This helps to improve braking performance, make the vehicle brake faster and more smoothly, and enhance the driving experience.

[0004] At present, most of the existing performance testing devices for automobile brake pads generally spray water from the bottom or below of the brake mechanism to simulate the use of the brake pads in rainy days or waterlogged roads, so as to test their performance. However, the degree of simulation of the actual environment around the automobile brake pads when the automobile is actually driving and braking is low in this way, so the reliability and scientificity of the final test results are also low. Therefore, it is necessary to propose a performance testing device for automobile brake pads, which can simulate the actual conditions such as waterlogged roads and muddy roads to test the performance indicators of brake pads, so that the test data is more reliable and scientific. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a performance testing device for automobile brake pads. The present invention is simple and easy to operate. Through the coordinated work of the testing body, water inlet pipe, water outlet pipe, rotating assembly and brake assembly, it can simulate actual conditions such as road surface water and muddy sections to test the performance indicators of brake pads, thereby making the test data more reliable and scientific.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a performance detection device for automobile brake pads, comprising a controller, a tire, a detection body and two brake pads, a detection groove is opened on the top of the detection body, and a water inlet pipe and a water outlet pipe connected to the detection groove are respectively provided on the two side surfaces of the detection body along the length direction, and a first solenoid valve and a second solenoid valve are respectively provided on the water inlet pipe and the water outlet pipe, and the first solenoid valve and the second solenoid valve are both electrically connected to the controller; a rotating assembly for simulating the rotation of the tire when the car is running is installed in the detection groove, and the rotating assembly is coaxially fixedly connected with the tire, a brake assembly for braking the rotating assembly is installed in the detection groove, and the brake pads are fixedly connected with the brake assembly, and the rotating assembly is located in the motion trajectory of the brake assembly, and a blowing assembly for simulating the actual airflow conditions when the car is running is installed on the inner wall of the detection groove, and a signal assembly for detecting the liquid level is installed at the bottom of the detection groove; the rotating assembly, the brake assembly, the blowing assembly and the signal assembly are all electrically connected to the controller;

[0007] The controller is used to control the working state of the first solenoid valve and the second solenoid valve according to a preset detection environment condition strategy, and adjust the liquid level inside the detection tank.

[0008] The principle of the basic scheme is: the height of the liquid level in the detection tank is adjusted by controlling the working status of the first solenoid valve and the second solenoid valve through the controller, the actual driving state of the car is simulated by the rotation of the rotating component, and the movement of the blowing component is controlled by the controller based on the movement of the rotating component; since the rotating component is located within the motion trajectory of the brake component, the brake component contacts and squeezes the rotating component as the brake component moves, and the braking of the rotating component is achieved through the friction between the brake component and the rotating component.

[0009] The beneficial effects of the basic scheme are: 1. Compared with the prior art in which water is sprayed from below or above the brake pads or brake mechanisms to simulate the actual situation of car driving on rainy days, the present invention rotates the tires to make the clean water or other simulated materials (mud, gravel, etc.) in the detection tank splash onto the rotating components and brake pads, which is more in line with the actual driving situation of cars on rainy days or when the road is flooded, thereby improving the degree of simulation of the actual driving and braking environmental conditions of the automobile brake pads during the detection process, so as to further improve the reliability and scientificity of the brake pad detection results; at the same time, the present invention can also simulate the wear state of the brake pads under conventional dry environments; and the liquid level in the detection tank can be adjusted by the controller to simulate the influence of the vehicle driving and braking on the working state of the brake pads when the road is flooded on rainy days, and can simulate the wear of the brake pads in some environments with excessive water accumulation, so as to facilitate the detection of the performance indicators of the brake pads under actual conditions such as rainy days and excessive water accumulation.

[0010] 2. The present invention simulates the rotation of the tire when the car is driving through the rotating component, and the blowing component can further simulate the actual airflow conditions, so that the brake pad can be closer to the actual use environment during the detection process, thereby ensuring the accuracy and reliability of the brake pad performance evaluation.

[0011] 3. The design of the controller realizes the centralized control of each component, including the start and stop of the rotating component, the braking strength of the brake component, the wind speed adjustment of the blowing component and the automatic adjustment of the liquid level. Through this automated and intelligent control, not only the detection efficiency is improved, but also the errors caused by human operation are reduced, ensuring the accuracy of the detection results.

[0012] Furthermore, the rotating assembly includes a first chamber opened inside the detection body, a first motor is fixedly connected in the first chamber, a first pulley is coaxially fixedly connected to the output shaft of the first motor, a rotating shaft is rotatably connected to the inner wall of the first chamber, a second pulley corresponding to the first pulley is coaxially fixedly connected to the rotating shaft, the first pulley and the second pulley are coordinated through belt transmission, one end of the rotating shaft away from the first motor passes through the detection body and extends into the detection groove and is coaxially fixedly connected to a brake disc, the end of the brake disc away from the first motor is detachably connected to the tire, and the first motor is electrically connected to the controller.

[0013] The beneficial effect of the basic scheme is that the first motor in the first chamber and the rotating shaft coaxially fixedly connected to the output shaft of the first motor realize efficient and accurate transmission of power from the motor to the rotating shaft. This design can ensure that the brake disc can operate stably and reliably during the tire rotation process when simulating the driving of the car, providing a solid foundation for subsequent performance testing.

[0014] Furthermore, the brake assembly includes a support rod fixedly connected to an inner wall of the detection slot close to the first motor, a brake caliper is fixedly connected to one end of the support rod away from the first motor, two inner walls of the brake caliper close to each other are respectively fixedly connected to two brake pads, the brake caliper is connected to a hydraulic assembly, and the hydraulic assembly is electrically connected to the controller.

[0015] The beneficial effect of the basic solution is: by controlling the output of the hydraulic component through the controller, the degree of pressure of the two brake pads in the brake caliper on the brake disc is controlled to simulate the braking effect under different braking forces, thereby being able to simulate more factors in the actual braking process, such as braking force, contact between the brake pad and the brake disc, etc., and thus being able to more realistically reflect the performance of the brake pad in actual use, which helps to improve the reliability and accuracy of the test results.

[0016] Furthermore, the blowing assembly includes a second chamber opened inside the detection body, a second motor is fixedly connected in the second chamber, an output shaft of the second motor passes through the detection body away from one end of the second motor and extends into the detection groove and is coaxially fixedly connected with a plurality of fan blades, a protective cover for protecting the fan blades is fixedly connected to the inner wall of the detection groove, and the second motor is electrically connected to the controller.

[0017] The beneficial effects of the basic solution are: the second motor in the second chamber rotates to drive the fan blades to rotate. The rotation of the fan blades can generate a stable airflow to evenly cool or heat the brake pads and brake discs, thereby ensuring a more uniform temperature distribution of the brake system during the test. This helps to improve the accuracy and reliability of the test results. At the same time, it can simulate the heat generated by the friction between the tires and the brake system during driving and the impact of the surrounding air flow on the brake system. The design of the protective cover can effectively prevent damage to the fan blades by external objects or impurities, extending the service life of the fan blades. At the same time, the protective cover can also reduce the noise and vibration generated when the fan blades rotate, improving the stability and reliability of the entire detection system.

[0018] Furthermore, the hydraulic assembly includes a hydraulic pipe connected to the brake caliper, the hydraulic pipe is connected to a hydraulic pump, and the hydraulic pump is electrically connected to the controller.

[0019] The beneficial effect of the basic solution is: through the precise control of the hydraulic pump by the controller, the flow and pressure of the hydraulic oil in the hydraulic pipe can be finely adjusted, which can directly affect the degree of compression of the brake pad on the brake disc in the brake caliper, thereby achieving precise control of the braking force, and can more truly reflect the performance of the brake pad in actual use, which helps to improve the reliability and accuracy of the test results.

[0020] Furthermore, the signal component includes a liquid level sensor fixedly connected to the bottom of the detection tank, and the liquid level sensor is electrically connected to the controller.

[0021] The beneficial effects of the basic solution are: the liquid level in the test tank is detected in real time by the liquid level sensor, so as to ensure that the liquid can be maintained within the appropriate detection range according to the environmental conditions required for the detection, thereby being able to more accurately simulate rainy cars; at the same time, the liquid level sensor can promptly detect abnormal liquid levels, such as liquid overflow caused by excessively high liquid levels, and even possible damage to the detection equipment, thereby improving the safety of the device.

[0022] Furthermore, a plurality of sealing rings are provided at the connection points between the rotating shaft and the second motor output shaft and the detection body.

[0023] The beneficial effect of the basic scheme is: through the design of the sealing ring, the possibility of liquid entering the first chamber and the second chamber during the detection simulation process and causing damage to the first motor and the second motor is reduced, thereby improving the safety during the simulation detection process.

[0024] Further, strategies for detecting environmental conditions include:

[0025] Strategy 1: The controller controls the first solenoid valve and the second solenoid valve to make the liquid level in the detection tank 5-10 cm higher than the bottom of the tire, and the above liquid level is set as the first liquid level;

[0026] Strategy 2: The controller controls the first solenoid valve and the second solenoid valve to make the liquid level in the detection tank 40-50 cm higher than the bottom of the tire, and sets the above liquid level to the second liquid level.

[0027] The beneficial effects of the basic scheme are: through strategy one, it simulates the test of the friction performance between the brake pads and the brake disc when the road surface is flooded in rainy days, and it can also simulate the use of brake pads on muddy roads in rainy days; through strategy two, it simulates the test of the friction performance between the brake pads and the brake disc when the road surface is flooded.

[0028] Furthermore, the controller is also used to control the rotation speed of the second motor according to the rotation speed of the first motor.

[0029] The beneficial effects of the basic scheme are: the controller controls the rotation of the second motor based on the rotation speed of the first motor, thereby simulating the heat generated by friction between the tires and the brake system during driving and the impact of the surrounding air flow on the brake system; at the same time, the gas flow around the brake pads in actual conditions is simulated to improve the accuracy and reliability of the test results.

[0030] Furthermore, the central axes of the second motor output shaft and the rotating shaft are both in the same horizontal plane; the protective cover is located on an inner side wall of the detection groove along the length direction and away from the brake caliper.

[0031] The beneficial effects of the basic scheme are: the central axis of the second motor output shaft and the rotating shaft are designed to be on the same horizontal plane, and the protective cover is located on an inner wall of the detection groove along the length direction and away from the brake caliper. This can better simulate the air flow around the brake pad in actual conditions when the fan blades rotate to generate wind, thereby further improving the reliability and scientific level of the brake pad detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an axonometric view of the performance testing device for automobile brake pads in this embodiment.

[0033] Figure 2 It is a top view of the performance testing device for automobile brake pads in this embodiment.

[0034] Figure 3 It is a partial cross-sectional view of the performance testing device for automobile brake pads in this embodiment.

[0035] Figure 4 Schematic diagram of the brake assembly in the performance testing device for automobile brake pads in this embodiment.

[0036] The figure marks in the drawings of the specification include: 1. detection body; 2. detection tank; 3. water outlet pipe; 4. second solenoid valve; 5. tire; 6. brake disc; 7. blowing assembly; 701. protective cover; 702. fan blade; 703. second motor; 704. second chamber; 8. rotating shaft; 9. support rod; 10. water inlet pipe; 11. first solenoid valve; 12. brake caliper; 13. first chamber; 14. first motor; 15. brake pad; 16. liquid level sensor; 17. first pulley; 18. second pulley. DETAILED DESCRIPTION

[0037] The following is further described in detail through specific implementation methods:

[0038] Embodiment 1:

[0039] Basically as attached Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown: a performance detection device for a car brake pad 15, comprising a controller, a tire 5, a detection body 1 and two brake pads 15, a detection groove 2 is opened on the top of the detection body 1, and a water inlet pipe 10 and a water outlet pipe 3 connected to the detection groove 2 are respectively welded on the two side surfaces of the detection body 1 along the length direction, and a first solenoid valve 11 and a second solenoid valve 4 are respectively bolted and fixedly connected to the water inlet pipe 10 and the water outlet pipe 3, and the first solenoid valve 11 and the second solenoid valve 4 are both electrically connected to the controller; a rotating assembly for simulating the rotation of the tire 5 when the car is running is installed in the detection groove 2, and the rotating assembly is coaxially rotatably connected with the tire 5, and a brake assembly for braking the rotating assembly is installed in the detection groove 2, and the brake pads 15 are fixedly connected to the brake assembly, and the rotating assembly is located in the motion track of the brake assembly, and a blowing assembly 7 for simulating the actual airflow situation when the car is running is installed on the inner wall of the detection groove 2, and a signal assembly for detecting the liquid level is installed at the bottom of the detection groove 2; the rotating assembly, the brake assembly, the blowing assembly 7 and the signal assembly are electrically connected to the controller;

[0040] The controller is used to control the working states of the first solenoid valve 11 and the second solenoid valve 4 according to the preset detection environment condition strategy, and adjust the liquid level inside the detection tank 2; and the controller can automatically adjust the detection process according to the preset detection parameters and real-time feedback data (such as liquid level, rotation speed, braking force, etc.) to ensure the accuracy and reliability of the test results.

[0041] Specifically, the strategies for detecting environmental conditions may include:

[0042] Strategy 1: The controller controls the first solenoid valve 11 and the second solenoid valve 4 to make the liquid level in the detection tank 2 10 cm higher than the bottom of the tire 5, and the above liquid level is set as the first liquid level;

[0043] Strategy 2: The controller controls the first solenoid valve 11 and the second solenoid valve 4 to make the liquid level in the detection tank 2 higher than the bottom of the tire 5 by 50 cm, and sets the above liquid level to the second liquid level.

[0044] Specifically, the rotating assembly includes a first chamber 13 opened inside the detection body 1, a first motor 14 is fixedly connected to the first chamber 13 by screws, a first pulley 17 is fixedly connected to the output shaft of the first motor 14 by coaxial screws, a rotating shaft 8 is rotatably connected to the inner wall of the first chamber 13, a second pulley 18 corresponding to the first pulley 17 is fixedly connected to the rotating shaft 8 by coaxial screws, the first pulley 17 and the second pulley 18 are matched through belt transmission, one end of the rotating shaft 8 away from the first motor 14 passes through the detection body 1 and extends into the detection slot 2 and is fixedly connected to the brake disc 6 by coaxial bolts, the end of the brake disc 6 away from the first motor 14 is detachably connected to the tire 5, and the first motor 14 is electrically connected to the controller.

[0045] Specifically, the brake assembly includes a support rod 9 fixedly connected by screws to an inner wall of the detection slot 2 close to the first motor 14, and a brake caliper 12 is fixedly connected by bolts at one end of the support rod 9 away from the first motor 14. The two inner walls of the brake caliper 12 close to each other are respectively fixedly connected to two brake pads 15. The brake caliper 12 is connected to a hydraulic assembly, and the hydraulic assembly is electrically connected to the controller.

[0046] Specifically, the blowing assembly 7 includes a second chamber 704 opened inside the detection body 1, and a second motor 703 is fixedly connected to the second chamber 704 by screws. The output shaft of the second motor 703 extends through the detection body 1 to the detection slot 2 away from one end of the second motor 703 and is coaxially screw-fixed with a plurality of fan blades 702. A protective cover 701 for protecting the fan blades 702 is fixedly connected to the inner wall of the detection slot 2 by screws, and the second motor 703 is electrically connected to the controller.

[0047] Specifically, the hydraulic assembly includes a hydraulic pipe connected to the brake caliper 12, the hydraulic pipe is connected to a hydraulic pump, and the hydraulic pump is electrically connected to the controller; the signal assembly includes a liquid level sensor 16 fixedly connected to the bottom of the detection tank 2, and the liquid level sensor 16 is electrically connected to the controller; the connection between the rotating shaft 8 and the output shaft of the second motor 703 and the detection body 1 is provided with a number of sealing rings; the hydraulic pump can provide stable hydraulic power, so that the brake caliper 12 can quickly and accurately clamp the brake pad 15 to simulate the real braking process. The pressure of the hydraulic system can be adjusted according to the detection requirements to simulate the performance under different braking forces.

[0048] The specific implementation process is as follows: first, the brake pad 15 to be tested is installed on the brake caliper 12, and the corresponding brake disc 6 is installed at the same time, so that the test result is more in line with the actual situation, so as to improve the reliability and scientificity of the test result.

[0049] When the controller performs control based on strategy 1, the second solenoid valve 4 is first closed, and the first solenoid valve 11 is opened at the same time, so that clean water is injected into the detection tank 2 through the water inlet pipe 10. At the same time, the liquid level sensor 16 monitors the liquid level in the detection tank 2 in real time and transmits the corresponding signal to the controller. The controller analyzes and obtains the real-time liquid level in the detection tank 2, and compares it with the first liquid level set in advance. When the real-time liquid level is greater than or equal to the first liquid level, the controller controls the first solenoid valve 11 to close, and the real-time liquid level in the detection tank 2 is maintained near the first liquid level, thereby simulating the actual situation of low road surface water on rainy days;

[0050] Then, the controller starts the first motor 14, and the first motor 14 will drive the first pulley 17 coaxially fixedly connected to its output shaft to rotate, and then the first pulley 17 will drive the second pulley 18 connected to it through a belt transmission to rotate. Since the second pulley 18 is coaxially fixedly connected to the rotating shaft 8 and the connection between the rotating shaft 8 and the detection body 1 is a rotational connection, the rotating shaft 8 will drive the brake disc 6 coaxially fixedly connected to it to rotate, and will also drive the tire 5 to rotate around its central axis. The belt transmission can convert the mechanical energy of the rotation of the first motor 14 into the kinetic energy of the rotation of the tire 5, and can also protect the first motor 14 from overload and burning out when braking, thereby making the entire simulation process more in line with the actual braking situation of the car when driving, so as to improve the safety and reliability of the detection data. During the rotation of the tire 5, the clean water in the detection tank 2 will splash onto the brake disc 6. At the same time, in order to better simulate the working effect of the brake pad 15 under actual conditions, after the tire 5 rotates for about fifteen minutes, the hydraulic pump is started by the controller to transport the hydraulic oil to the brake caliper 12 through the hydraulic pipe, so that the two brake plates in the brake caliper 12 squeeze the brake disc 6 through the hydraulic action to brake and stop the output of the first motor 14 at the same time. When the tire 5 stops rotating, the relevant data (the speed of the first motor 14, the braking time and the output pressure of the hydraulic pump, etc.) are recorded, and then the first motor 14 is started again after the tire 5 stops for about one minute, and the above operation is repeated to obtain multiple groups of data for comprehensive analysis, thereby eliminating the interference of accidental factors on the detection data during the simulation detection experiment of the brake pad 15 to improve the reliability of the detection data.

[0051] During the rotation and braking of the tire 5, the controller will control the second motor 703 to start, and the output shaft of the second motor 703 will drive the fan blades 702 to rotate to blow air to the brake disc 6 to simulate the air flow around the brake pad 15 in actual conditions, thereby improving the accuracy of the detection data.

[0052] At the same time, factors that affect the service life of the automobile brake pad 15, such as mud and pebbles, can be added into the detection tank 2 to simulate the use and performance of the automobile brake pad 15 under other environmental conditions such as muddy roads, thereby better detecting the performance indicators of the automobile brake pad 15. In addition, in order to prevent the clean water in the detection tank 2 from entering the first chamber 13 and the second chamber 704 during the detection and causing damage to the first motor 14 and the second motor 703, sealing rings are provided at the connection between the output shaft of the second motor 703 and the rotating shaft 8 and the detection body 1 for waterproofing.

[0053] After the detection is completed, the controller opens the second solenoid valve 4 and the first solenoid valve 11, so that the clean water and simulated materials such as mud and sand in the detection tank 2 are discharged from the detection tank 2 through the outlet pipe 3, and then closes the first solenoid valve 11. When the real-time liquid level in the detection tank 2 is lower than the preset threshold, the second solenoid valve 4 is closed, thereby facilitating the cleaning of the detection tank 2 and reducing the burden on the staff.

[0054] Embodiment 2:

[0055] The difference from the above embodiment is that, as shown in the attached Figure 3 As shown: the controller is also used to control the rotation speed of the second motor 703 according to the rotation speed of the first motor 14.

[0056] The specific implementation process is as follows: during the rotation and braking of the tire 5, the controller controls the rotation speed of the second motor 703 based on the rotation speed of the first motor 14, thereby controlling the rotation of the fan blades 702, thereby simulating the heat generated by the friction between the tire 5 and the brake system during the driving of the vehicle and the influence of the surrounding air flow on the brake system; at the same time, the gas flow around the brake pad 15 in actual conditions is simulated to improve the accuracy and reliability of the detection results.

[0057] Embodiment 3:

[0058] The difference from the above embodiment is that, as shown in the attached Figure 2 As shown, the central axis of the output shaft of the second motor 703 and the rotating shaft 8 are both in the same horizontal plane; the protective cover 701 is located on an inner side wall of the detection slot 2 along the length direction and away from the brake caliper 12.

[0059] The specific implementation process is as follows: the central axis of the output shaft of the second motor 703 and the rotating shaft 8 are both in the same horizontal plane, and the protective cover 701 is located on an inner wall of the detection slot 2 along the length direction and away from the brake caliper 12, so as to enable the fan blades 702 to rotate and generate wind to better simulate the air flow around the brake pad 15 in actual conditions, thereby further improving the reliability and scientificity of the brake pad 15 detection results.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A performance testing device for automobile brake pads, characterized in that: The invention comprises a controller, a tire (5), a detection body (1) and two brake pads (15); a detection groove (2) is formed on the top of the detection body (1); a water inlet pipe (10) and a water outlet pipe (3) connected to the detection groove (2) are respectively provided on the two side surfaces of the detection body (1) along the length direction; a first solenoid valve (11) and a second solenoid valve (4) are respectively provided on the water inlet pipe (10) and the water outlet pipe (3); the first solenoid valve (11) and the second solenoid valve (4) are both electrically connected to the controller; a valve for simulating the wheel friction when the car is running is installed in the detection groove (2); A rotating assembly for rotating the tire (5), the rotating assembly is coaxially fixedly connected to the tire (5), a brake assembly for braking the rotating assembly is installed in the detection groove (2), the brake pads (15) are fixedly connected to the brake assembly, the rotating assembly is located in the movement track of the brake assembly, a blowing assembly (7) for simulating the actual airflow conditions when the car is running is installed on the inner wall of the detection groove (2), and a signal assembly for detecting the liquid level is installed at the bottom of the detection groove (2); the rotating assembly, the brake assembly, the blowing assembly (7) and the signal assembly are all electrically connected to the controller; The controller is used to control the first solenoid valve (11) and the second solenoid valve (4) according to a preset detection environment condition strategy to adjust the liquid level inside the detection tank (2).

2. The performance testing device for automobile brake pads according to claim 1, characterized in that: The rotating assembly comprises a first chamber (13) opened inside a detection body (1), a first motor (14) is fixedly connected inside the first chamber (13), a first belt pulley (17) is coaxially fixedly connected to the output shaft of the first motor (14), a rotating shaft (8) is rotatably connected to the inner wall of the first chamber (13), a second belt pulley (18) corresponding to the first belt pulley (17) is coaxially fixedly connected to the rotating shaft (8), the first belt pulley (17) and the second belt pulley (18) are matched through a belt transmission, an end of the rotating shaft (8) away from the first motor (14) passes through the detection body (1) and extends into the detection groove (2) and is coaxially fixedly connected to a brake disc (6), an end of the brake disc (6) away from the first motor (14) is detachably connected to the tire (5), and the first motor (14) is electrically connected to a controller.

3. The performance testing device for automobile brake pads according to claim 2, characterized in that: The brake assembly comprises a support rod (9) fixedly connected to an inner wall of the detection slot (2) close to the first motor (14); an end of the support rod (9) away from the first motor (14) is fixedly connected to a brake caliper (12); two inner walls of the brake caliper (12) close to each other are respectively fixedly connected to two brake pads (15); the brake caliper (12) is connected to a hydraulic assembly, and the hydraulic assembly is electrically connected to a controller.

4. The performance testing device for automobile brake pads according to claim 3 is characterized in that: The blowing assembly (7) comprises a second chamber (704) opened inside the detection body (1), a second motor (703) is fixedly connected inside the second chamber (704), an output shaft of the second motor (703) extends through the detection body (1) at one end away from the second motor (703) into the detection slot (2) and is coaxially fixedly connected with a plurality of fan blades (702), a protective cover (701) for protecting the fan blades (702) is fixedly connected to the inner wall of the detection slot (2), and the second motor (703) is electrically connected to the controller.

5. The performance testing device for automobile brake pads according to claim 4, characterized in that: The hydraulic assembly comprises a hydraulic pipe connected to the brake caliper (12), the hydraulic pipe is connected to a hydraulic pump, and the hydraulic pump is electrically connected to the controller.

6. The performance testing device for automobile brake pads according to claim 5, characterized in that: The signal component comprises a liquid level sensor (16) fixedly connected to the bottom of the detection tank (2), and the liquid level sensor (16) is electrically connected to the controller.

7. The performance testing device for automobile brake pads according to claim 6, characterized in that: A plurality of sealing rings are provided at the connection points between the rotating shaft (8) and the output shaft of the second motor (703) and the detection body (1).

8. The performance testing device for automobile brake pads according to claim 7, characterized in that: Strategies for detecting environmental conditions include: Strategy 1: The controller controls the first solenoid valve (11) and the second solenoid valve (4) to make the liquid level in the detection tank (2) 5-10 cm higher than the bottom of the tire (5), and the above liquid level is set to a first liquid level; Strategy 2: The controller controls the first solenoid valve (11) and the second solenoid valve (4) to make the liquid level in the detection tank (2) 40-50 cm higher than the bottom of the tire (5), and sets the above liquid level to the second liquid level.

9. The performance testing device for automobile brake pads according to claim 8, characterized in that: The controller is also used to control the rotation speed of the second motor (703) according to the rotation speed of the first motor (14).

10. The performance testing device for automobile brake pads according to claim 9, characterized in that: The central axes of the output shaft of the second motor (703) and the rotating shaft (8) are both in the same horizontal plane; the protective cover (701) is located on an inner side wall of the detection slot (2) along the length direction and away from the brake caliper (12).

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