Automobile braking force detection device

Abstract

The utility model relates to the technical field of detection devices, in particular to an automobile braking force detection device which comprises a traveling table and a detection table assembly, a roller assembly is rotatably connected to the inner side of the detection table assembly, a resistance control assembly is installed on the outer side of the roller assembly, the roller assembly comprises a roller body, and a rotary column is fixedly connected to the outer side of the roller body. A ball bearing is fixedly connected to the outer side of the rotating column, fan blades are fixedly connected to one side of the rotating column, the resistance control assembly comprises a supporting shell, a circulating groove, a shaft through hole, an air inlet through hole and an air outlet through hole are formed in the inner side of the supporting shell, a rubber sealing ring is fixedly connected to the inner side of the shaft through hole, and an electromagnetic valve is fixedly connected to the inner side of the air inlet through hole; according to the device, the resistance of the roller is flexibly adjusted by controlling the smoothness of airflow, the real road condition is simulated, the detection accuracy and reliability are improved, a scientific means is provided for evaluation of an automobile brake system, and the safety is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, specifically to an automobile braking force detection device. Background Technology

[0002] The automotive braking force testing device is a key piece of equipment used to evaluate the performance of automotive braking systems. It simulates actual braking conditions and measures parameters such as the magnitude of braking force applied by the vehicle during braking, braking distance, braking stability, and braking system response time to ensure that the vehicle's braking system meets safety standards and provides important protection for safe driving. This device is widely used in automotive manufacturing, repair, testing, and traffic safety research.

[0003] The working principle of the roller brake test bench is to drive the roller to rotate by a motor to simulate the driving state of a car. When the car wheel is placed on the roller and rotates with the roller, braking is applied. The friction between the wheel and the roller is detected by a high-precision braking force sensor and converted into an electrical signal. After being processed by the data acquisition system, the magnitude of the braking force is calculated. At the same time, the speed sensor monitors the roller speed in real time. The rotation speed of the roller is precisely controlled by a closed-loop control system to simulate braking conditions at different vehicle speeds, thereby achieving accurate testing of the vehicle's braking performance.

[0004] During actual driving, the contact conditions between the tires and the road surface vary due to various factors, such as the road surface material. These different road conditions cause changes in the coefficient of friction between the tires and the road surface, thus affecting the braking performance of the vehicle. However, in existing roller-type brake test benches, the rotational resistance of the rollers is usually fixed during operation and cannot be adjusted in real time according to different environmental conditions. This lack of flexibility limits the test bench in simulating real road conditions and makes it unable to accurately reflect the braking performance of the vehicle under various actual driving conditions, thereby reducing its performance and the reliability of the test results. Therefore, a vehicle braking force testing device is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a vehicle braking force testing device to solve the problem that in the operation of existing roller brake test benches, the rotational resistance of the rollers is usually fixed and cannot be adjusted in real time according to different environmental conditions. This lack of flexibility limits the test bench in simulating real road conditions and makes it unable to accurately reflect the braking force performance of vehicles under various actual driving conditions, thereby reducing its performance and the reliability of the test results.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automotive braking force testing device includes a driving platform and a testing platform assembly. A roller assembly is rotatably connected to the inner side of the testing platform assembly, and a resistance control assembly is installed on the outer side of the roller assembly. The roller assembly includes a roller body, a rotating column is fixedly connected to the outer side of the roller body, a ball bearing is fixedly connected to the outer side of the rotating column, and a fan blade is fixedly connected to one side of the rotating column. The resistance control assembly includes a support shell, and the inner side of the support shell has a flow groove, a shaft through hole, an air inlet hole, and an air outlet hole. A rubber sealing ring is fixedly connected to the inner side of the shaft through hole, and a solenoid valve is fixedly connected to the inner side of the air inlet hole. The inner side of the rubber sealing ring is in contact with the outer side of the rotating column, and the bottom end of the support shell is fixedly connected to the inner side of the testing platform assembly.

[0008] As a further optimization of this utility model, the detection platform assembly includes a detection platform body, a detection groove is provided on the inner side of the detection platform body, a protective box is fixedly connected to the outer side of the detection platform body, and the front end of the detection platform body is fixedly connected to the rear end of the travel platform.

[0009] As a further optimization of this utility model, the following features are provided: a heat dissipation and filtering hole is provided through one end of the protective box; the inner side of the protective box is a hollow structure; the heat dissipation and filtering hole is connected to the inner side of the protective box; and the bottom end of the support shell is fixedly connected to the inner side of the protective box by bolts.

[0010] As a further optimization of this utility model, the following features are provided: a shaft hole is provided on the inner side of the detection platform body near the rotating column, the shaft hole of the detection platform body is connected to the detection groove, and the roller body is embedded and installed inside the detection groove.

[0011] As a further optimization of this utility model, the rotating column is embedded in the inner side of the shaft hole of the testing platform body, the rotating column extends out of the outer side of the testing platform body, and the ball bearing is fixedly connected to the inner side of the shaft hole of the testing platform body.

[0012] As a further optimization of this utility model, one end of the rotating column is embedded in the inner side of the support shell, and the left and right ends of the support shell are both provided with shaft through holes. The fan blade is embedded in the interior of the flow groove, and the axis of the rotating column and the axis of the shaft through hole are on the same horizontal line.

[0013] As a further optimization of this utility model, the following features are provided: the air outlet hole penetrates one end of the support shell, the air outlet hole is connected to the flow groove, and the number of air inlet holes is multiple, the number of air inlet holes being the same as the number of solenoid valves.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, the device, through the configured roller assembly and resistance control assembly, can flexibly adjust the rotational resistance of the roller according to different usage environments, thereby simulating various real-world vehicle braking conditions. This significantly improves the accuracy and reliability of the test results. By controlling the smoothness of airflow to adjust the rotational resistance of the roller, the test bench can more closely resemble actual driving conditions. This flexibility not only overcomes the limitations of existing roller-type brake test benches in simulating real-world road conditions, but also greatly reduces mechanical wear and extends service life. It provides a more scientific and reliable testing method for the comprehensive evaluation of vehicle braking systems, and offers more precise technical support for fields such as automobile manufacturing, repair, testing, and traffic safety research, ultimately contributing to improving the overall safety performance of vehicle braking systems. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the testing platform of this utility model;

[0018] Figure 3 This is a schematic diagram of the protective box structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the roller body structure of this utility model;

[0020] Figure 5 This is a cross-sectional structural diagram of the roller assembly of this utility model;

[0021] Figure 6 This is a cross-sectional structural diagram of the resistance control component of this utility model;

[0022] Figure 7 This is a schematic diagram of the fan blade structure of this utility model.

[0023] In the diagram: 1. Driving platform;

[0024] 2. Testing station assembly; 21. Testing station body; 22. Testing groove; 23. Protective box; 24. Heat dissipation and filter holes;

[0025] 3. Drum assembly; 31. Drum body; 32. Rotating column; 33. Ball bearing; 34. Fan blade;

[0026] 4. Resistance control assembly; 41. Support housing; 42. Flow groove; 43. Shaft through hole; 44. Rubber sealing ring; 45. Air inlet hole; 46. Solenoid valve; 47. Air outlet hole. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Please see Figure 1-7 This utility model provides a technical solution:

[0030] The vehicle braking force testing device includes a driving platform 1 and a testing platform assembly 2. A roller assembly 3 is rotatably connected to the inner side of the testing platform assembly 2, and a resistance control assembly 4 is installed on the outer side of the roller assembly 3. The roller assembly 3 includes a roller body 31, a rotating column 32 is fixedly connected to the outer side of the roller body 31, a ball bearing 33 is fixedly connected to the outer side of the rotating column 32, and a fan blade 34 is fixedly connected to one side of the rotating column 32. The resistance control assembly 4 includes a support shell 41. The inner side of the support shell 41 is provided with a flow groove 42, a shaft through hole 43, an air inlet hole 45, and an air outlet hole 47. A rubber sealing ring 44 is fixedly connected to the inner side of the shaft through hole 43, and a solenoid valve 46 is fixedly connected to the inner side of the air inlet hole 45. The inner side of the rubber sealing ring 44 is in contact with the outer side of the rotating column 32. The bottom end of the support shell 41 is fixedly connected to the inner side of the testing platform assembly 2.

[0031] As a further implementation of this solution, the testing platform assembly 2 includes a testing platform body 21. A testing groove 22 is provided on the inner side of the testing platform body 21. A protective box 23 is fixedly connected to the outer side of the testing platform body 21. The front end of the testing platform body 21 is fixedly connected to the rear end of the traveling platform 1. A heat dissipation filter hole 24 is provided through one end of the protective box 23. The inner side of the protective box 23 is a hollow structure. The heat dissipation filter hole 24 communicates with the inner side of the protective box 23. The bottom end of the support shell 41 is fixedly connected to the inner side of the protective box 23 by bolts. Through the above settings, a stable structural foundation is formed, which provides a guarantee for the installation of subsequent components and the stability of the overall device. The hollow structure of the protective box 23 and the setting of the heat dissipation filter hole 24 provide a channel for gas flow, allowing gas to flow smoothly inside the device. At the same time, the heat dissipation filter hole 24 can filter impurities, which plays a role in protecting the internal structure of the protective box 23.

[0032] As a further implementation of this solution, the inner side of the test bench body 21 near the rotating column 32 is provided with a shaft hole. The shaft hole of the test bench body 21 is connected to the test groove 22. The roller body 31 is embedded in the test groove 22, and the rotating column 32 is embedded in the inner side of the shaft hole of the test bench body 21. The rotating column 32 extends out of the outer side of the test bench body 21. The ball bearing 33 is fixedly connected to the inner side of the shaft hole of the test bench body 21. Through the above arrangement, precise positioning and support are provided for the installation of the roller body 31 and the rotating column 32, ensuring the coaxiality and stability of the roller body 31 and the rotating column 32 during operation. This design helps to reduce mechanical vibration and wear, and improve the measurement accuracy and operating efficiency of the test bench.

[0033] As a further implementation of this solution, one end of the rotating column 32 is embedded in the inner side of the support shell 41. The left and right ends of the support shell 41 are both provided with shaft through holes 43. The fan blade 34 is embedded in the inside of the flow groove 42. The axis of the rotating column 32 and the axis of the shaft through hole 43 are on the same horizontal line. With the above arrangement, the rubber sealing ring 44 inside the shaft through hole 43 can prevent external gas from entering the inside of the flow groove 42 through the support shell 41 and the rotating column 32, thus ensuring the accuracy of the gas flow rate.

[0034] As a further implementation of this scheme, the air outlet 47 penetrates one end of the support shell 41 and is connected to the flow groove 42. The number of air inlets 45 is the same as the number of solenoid valves 46. Through the above settings, the smoothness of airflow can be flexibly adjusted by controlling the number of solenoid valves 46 on and off, thereby achieving precise control of rotational resistance. This design not only improves the flexibility and adaptability of the test bench, but also provides a wider range of possibilities for simulating various real road conditions, further improving the accuracy and reliability of the test results.

[0035] Workflow: During vehicle braking force testing, the vehicle travels on top of the driving platform 1 and testing platform assembly 2, with the two front-wheel drive tires traveling between their corresponding roller bodies 31. As the vehicle travels, the tires drive the two roller bodies 31 to rotate, which in turn drives the rotating column 32 to rotate. The rotating column 32 is rotatably connected to the inside of the testing platform body 21 via ball bearings 33. When the vehicle brakes, the friction between the wheels and the roller bodies 31 is detected by existing sensors and converted into electrical signals. The electrical signals output by the sensors are received and processed by the data acquisition system to calculate the braking force. The magnitude of the braking force reflects the performance of the braking system. When it is necessary to control the rotational resistance of the roller bodies 31 according to the operating environment, the resistance during roller body rotation is controlled by controlling the opening and closing of solenoid valves 46. The more solenoid valves 46 are opened, the lower the rotational resistance of the roller bodies 31; conversely, the fewer solenoid valves 46 are opened, the greater the resistance. The control of the solenoid valves... The number of times solenoid valves 46 are opened controls the flow rate of gas inside the flow channel 42, thereby simulating the detection of car braking under different environments. The principle of controlling the rotational resistance of the roller body 31 is that when the rotating column 32 rotates, it drives the fan blades 34 to rotate. The fan blades 34 rotate inside the flow channel 42. When the number of times the solenoid valves 46 are opened is greater, the external air flows more smoothly from the air inlet 45, the gas inside the solenoid valves 46, through the flow channel 42, and the air outlet 47. Thus, the resistance when the roller body 31 and the rotating column 32 rotate is smaller. Conversely, when the number of times the solenoid valves 46 are opened is smaller, the air velocity through the solenoid valves 46, the flow channel 42, and the air outlet 47 is lower, and the rotational resistance of the roller body 31 is greater. Based on the above principles, the device installs fan blades 34 on the rotating column 32 and controls the airflow speed to control the rotational resistance of the fan blades 34. This allows the rotational resistance of the roller body 31 to be controlled according to the usage environment, thereby simulating real road conditions in different environments and improving the accuracy and reliability of the detection results.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vehicle braking force testing device, comprising a driving platform (1) and a testing platform assembly (2), characterized in that: The inner side of the testing platform assembly (2) is rotatably connected to a roller assembly (3), and the outer side of the roller assembly (3) is equipped with a resistance control assembly (4). The roller assembly (3) includes a roller body (31), a rotating column (32) is fixedly connected to the outside of the roller body (31), a ball bearing (33) is fixedly connected to the outside of the rotating column (32), and a fan blade (34) is fixedly connected to one side of the rotating column (32). The resistance control component (4) includes a support shell (41), and the support shell (41) has a flow groove (42), a shaft through hole (43), an air inlet hole (45) and an air outlet hole (47) on its inner side. A rubber sealing ring (44) is fixedly connected to the inner side of the shaft through hole (43), and a solenoid valve (46) is fixedly connected to the inner side of the air inlet hole (45). The inner side of the rubber sealing ring (44) is fitted with the outer side of the rotating column (32), and the bottom end of the support shell (41) is fixedly connected to the inner side of the detection table assembly (2).

2. The vehicle braking force detection device according to claim 1, characterized in that: The testing platform assembly (2) includes a testing platform body (21), a testing groove (22) is provided on the inner side of the testing platform body (21), a protective box (23) is fixedly connected to the outer side of the testing platform body (21), and the front end of the testing platform body (21) is fixedly connected to the rear end of the driving platform (1).

3. The vehicle braking force detection device according to claim 2, characterized in that: The protective box (23) has a heat dissipation filter hole (24) through one end. The inner side of the protective box (23) is a hollow structure. The heat dissipation filter hole (24) is connected to the inner side of the protective box (23). The bottom end of the support shell (41) is fixedly connected to the inner side of the protective box (23) by bolts.

4. The vehicle braking force detection device according to claim 2, characterized in that: The detection platform body (21) has a shaft hole on the inner side near the rotating column (32). The shaft hole of the detection platform body (21) is connected to the detection groove (22). The roller body (31) is embedded in the detection groove (22).

5. The vehicle braking force detection device according to claim 1, characterized in that: The rotating column (32) is embedded in the inner side of the shaft hole of the test platform body (21), the rotating column (32) extends out of the outer side of the test platform body (21), and the ball bearing (33) is fixedly connected to the inner side of the shaft hole of the test platform body (21).

6. The vehicle braking force detection device according to claim 1, characterized in that: One end of the rotating column (32) is embedded in the inner side of the support shell (41). The left and right ends of the support shell (41) are both provided with shaft through holes (43). The fan blade (34) is embedded in the inside of the flow groove (42). The axis of the rotating column (32) and the axis of the shaft through hole (43) are on the same horizontal line.

7. The vehicle braking force detection device according to claim 1, characterized in that: The air outlet (47) penetrates one end of the support shell (41), and the air outlet (47) is connected to the flow groove (42). The number of air inlet (45) is multiple, and the number of air inlet (45) is the same as the number of solenoid valves (46).

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