A highway pavement friction force detection device

Abstract

The utility model discloses a highway pavement friction detection device relates to road detection technical field. The utility model discloses a mounting frame, the inside limit sliding connection of mounting frame has the thread sleeve, the central place limit rotary connection of mounting frame inside has the thread rod, the top fixed mounting of mounting frame has the motor, and the motor is connected with the thread rod drive, the left -hand end fixed connection of thread sleeve has the connecting plate, the left side of connecting plate is provided with the damping cylinder, the right side wall fixed connection of damping cylinder has the mounting panel, the mounting panel is fixed mounting through the bolt with connecting plate, the inside sliding connection of damping cylinder bottom has the telescopic column. The utility model can be more convenient and fast to the friction of highway pavement carries out the detection, improves the efficiency of detection, can be convenient for the test of different load and different initial speed condition to the pavement friction, and then obtains a plurality of data, improves the practicality of friction detection device.

Description

Technical Field

[0001] This utility model relates to the field of road testing technology, specifically to a highway pavement friction testing device. Background Technology

[0002] Road inspection is a key technical support for ensuring road safety and extending its service life. It is a multi-dimensional system engineering project that covers pavement performance, structural safety, drainage system and other aspects. Its core purpose is to comprehensively assess the current condition and potential risks of roads through scientific testing methods, so as to provide a basis for maintenance and repair. The testing of road surface friction is one of them.

[0003] Existing road surface friction testing devices all rely on repeated emergency braking of vehicles on the road surface during use. However, this testing method is not only time-consuming and labor-intensive with low testing efficiency, but it also easily produces large areas of tire marks on the road surface, affecting the subsequent normal use of the road. Furthermore, it is not convenient to conduct tests under different loads and initial speeds, thus the practicality of friction testing devices needs to be improved. Utility Model Content

[0004] The purpose of this utility model is to solve the problems that the traditional detection methods mentioned above are not only time-consuming and labor-intensive, with low detection efficiency, but also easily produce large areas of tire marks on the road surface, affecting the subsequent normal use of the road, and are not convenient for testing under different loads and different initial speeds, thus making the practicality of the friction detection device need to be improved. This utility model provides a highway road surface friction detection device.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution: A road surface friction testing device includes a mounting frame. A threaded sleeve is slidably connected to the inside of the mounting frame. A threaded rod is rotatably connected to the center of the mounting frame. A motor is fixedly mounted on the top of the mounting frame and is driven by the threaded rod. A connecting plate is fixedly connected to the left end of the threaded sleeve. A vibration damper is disposed on the left side of the connecting plate. A mounting plate is fixedly connected to the right side wall of the vibration damper. The mounting plate is fixedly mounted to the connecting plate by bolts. A telescopic column is slidably connected to the bottom of the vibration damper. A spring is fixedly connected between the top of the telescopic column and the inner wall of the top of the vibration damper. A connecting crankshaft is fixedly mounted on the bottom of the telescopic column. A tire is rotatably connected to the left side of the bottom of the connecting crankshaft. A drive motor is fixedly mounted on the right side of the bottom of the connecting crankshaft and is driven by the tire.

[0006] Furthermore, the mounting frame is used for fixed installation with the inspection vehicle, enabling the inspection vehicle to drive the inspection device to the inspection position on the road surface.

[0007] Furthermore, the threaded rod passes through the center of the threaded sleeve, and the threaded sleeve is threadedly connected to the threaded rod. Therefore, during the rotation of the threaded rod, it can drive the threaded sleeve to move up and down.

[0008] Furthermore, the connecting plate extends to the left side of the mounting frame, and the right sidewall of the connecting plate is attached to the left sidewall of the mounting frame, thereby improving the stability of the upper and lower limit sliding connection between the threaded sleeve and the connecting plate.

[0009] Furthermore, the connecting plate has multiple sets of mounting holes on its front and rear sides, allowing the mounting plate to be fixedly installed at different heights on the left side of the connecting plate, thereby enabling adjustment of the initial height of the vibration damper.

[0010] Furthermore, a speed sensor is installed at the bottom of the connecting crankshaft to monitor the tire rotation speed, thereby enabling real-time monitoring of the tire rotation speed during the detection process and obtaining the tire rotation speed change curve.

[0011] Furthermore, a mudguard is fixedly installed on the left end of the top of the connecting crankshaft. The mudguard is located on the outer side of the top of the tire to prevent mud and sand from being thrown out during the testing process.

[0012] The beneficial effects of this utility model are as follows: This invention utilizes a drive motor to rotate the tire and, through the cooperation of a threaded rod and a threaded sleeve, a damping cylinder moves downward to create elastic compression contact between the tire and the road surface. By monitoring changes in tire speed, the friction force of the road surface is measured, making it more convenient and efficient to detect road surface friction. Furthermore, the drive motor and the up-and-down movement of the damping cylinder facilitate testing of road surface friction under different loads and initial speeds, obtaining multiple sets of data and enhancing the practicality of the friction detection device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ; Figure 3 This is an exploded view of the three-dimensional structure of this utility model; Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the mounting frame of this utility model; Figure 5 This is a three-dimensional structural diagram of the shock absorber and tire installation of this utility model; Figure 6This is a partial cross-sectional three-dimensional structural diagram of the vibration damper and tire mounting of this utility model; Figure 7 This is an exploded view of the three-dimensional structure of the tire and mudguard of this utility model.

[0014] Reference numerals: 1. Mounting frame; 2. Threaded sleeve; 3. Threaded rod; 4. Motor; 5. Connecting plate; 6. Vibration damper; 7. Mounting plate; 8. Telescopic column; 9. Spring; 10. Connecting crankshaft; 11. Tire; 12. Drive motor; 13. Mudguard. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0016] A preferred embodiment of the present invention, a road surface friction detection device, will be described in detail below, such as... Figures 1-7 As shown, a road surface friction testing device includes a mounting frame 1, which is used to fix the device to a testing vehicle so that the testing vehicle can drive the testing device to the testing position on the road surface.

[0017] The mounting frame 1 has a threaded sleeve 2 that is slidably connected to the inside. The mounting frame 1 has a threaded rod 3 that is rotatably connected to the center of the mounting frame 1. The top of the mounting frame 1 is fixedly mounted with a motor 4, which is connected to the threaded rod 3 for driving the threaded rod 3 to rotate. The threaded rod 3 passes through the center of the threaded sleeve 2, and the threaded sleeve 2 is threadedly connected to the threaded rod 3. Therefore, during the rotation of the threaded rod 3, the threaded sleeve 2 can be driven to move up and down.

[0018] A connecting plate 5 is fixedly connected to the left end of the threaded sleeve 2. The connecting plate 5 extends to the left side of the mounting frame 1, and the right side wall of the connecting plate 5 is attached to the left side wall of the mounting frame 1, thereby improving the stability of the upper and lower limit sliding connection between the threaded sleeve 2 and the connecting plate 5. A vibration damping cylinder 6 is provided on the left side of the connecting plate 5, and a mounting plate 7 is fixedly connected to the right side wall of the vibration damping cylinder 6. The mounting plate 7 is fixedly installed to the connecting plate 5 by bolts. Multiple sets of mounting holes are opened on the front and rear sides of the connecting plate 5, so that the mounting plate 7 can be fixedly installed at different heights on the left side of the connecting plate 5, thereby adjusting the initial height of the vibration damping cylinder 6.

[0019] A telescopic column 8 is slidably connected to the bottom of the damper 6. A spring 9 is fixedly connected between the top of the telescopic column 8 and the inner wall of the top of the damper 6. A connecting crankshaft 10 is fixedly installed at the bottom of the telescopic column 8. A speed sensor is installed at the bottom of the connecting crankshaft 10 to monitor the rotational speed of the tire 11, thereby monitoring the rotational speed of the tire 11 in real time during the detection process and obtaining the rotational speed change curve of the tire 11. The tire 11 is rotatably connected to the left side of the bottom of the connecting crankshaft 10. A drive motor 12 is fixedly installed on the right side of the bottom of the connecting crankshaft 10 and is connected to the tire 11 for driving the tire 11 to rotate.

[0020] A mudguard 13 is fixedly installed on the left end of the top of the crankshaft 10. The mudguard 13 is located on the outside of the top of the tire 11 to prevent mud and sand from being thrown out during the testing process.

[0021] The working principle of this utility model is as follows: During testing, the testing device is moved to the edge of the test road surface by fixing the mounting frame 1 to the testing vehicle. Then, the tire 11 is driven to rotate by the drive motor 12. After the tire 11 reaches the specified speed, the motor 4 is started, which drives the threaded rod 3 to rotate. During the rotation of the threaded rod 3, the threaded connection between the threaded sleeve 2 and the threaded rod 3, as well as the limiting sliding connection of the threaded sleeve 2 inside the mounting frame 1, can drive the threaded sleeve 2 and the connecting plate 5 to move downward.

[0022] As the connecting plate 5 moves downward, it drives the mounting plate 7 and the damping cylinder 6, which are fixedly installed on the left, to move downward. This, in turn, drives the telescopic column 8 and the connecting crankshaft 10 to move downward, causing the connecting crankshaft 10 to bring the tire 11 into contact with the road surface. The upward compression of the spring 9 by the telescopic column 8 inside the damping cylinder 6 makes the contact between the tire 11 and the road surface an elastic compression contact. During the compression contact between the tire 11 and the road surface, the friction between the road surface and the tire 11 causes the rotating tire 11 to gradually decrease in speed and stop rotating. The speed sensor at the bottom of the connecting crankshaft 10 can monitor the change in the tire 11's speed and determine the time it takes for the tire 11's speed to gradually decrease until it stops rotating, thus reflecting the friction of the road surface and realizing the detection of road surface friction.

[0023] The initial speed of the tire 11 can be more easily controlled and adjusted by the drive motor 12. The rotation of the threaded rod 3 driven by the motor 4 drives the threaded sleeve 2 and the connecting plate 5 to move up and down, which can control and adjust the pressure of the tire 11 in elastic compression contact with the road surface. This facilitates the testing of road friction under different loads and different initial speeds, and improves the practicality of the friction testing device.

[0024] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A road surface friction testing device, comprising a mounting frame (1), characterized in that, The mounting frame (1) is internally limited and slidably connected to a threaded sleeve (2). A threaded rod (3) is rotatably connected to the center of the mounting frame (1). A motor (4) is fixedly installed on the top of the mounting frame (1), and the motor (4) is connected to the threaded rod (3) in a transmission connection. A connecting plate (5) is fixedly connected to the left end of the threaded sleeve (2). A vibration damping cylinder (6) is provided on the left side of the connecting plate (5). A mounting plate (7) is fixedly connected to the right side wall of the vibration damping cylinder (6). The mounting plate (7) is secured by bolts. The shock absorber (6) is fixedly installed with the connecting plate (5). A telescopic column (8) is slidably connected to the bottom of the shock absorber (6). A spring (9) is fixedly connected between the top of the telescopic column (8) and the inner wall of the top of the shock absorber (6). A connecting crankshaft (10) is fixedly installed at the bottom of the telescopic column (8). A tire (11) is rotatably connected to the left side of the bottom of the connecting crankshaft (10). A drive motor (12) is fixedly installed on the right side of the bottom of the connecting crankshaft (10), and the drive motor (12) is connected to the tire (11) in a transmission connection.

2. The highway pavement friction testing device according to claim 1, characterized in that, The mounting frame (1) is used for fixed installation with the inspection vehicle.

3. The highway pavement friction testing device according to claim 1, characterized in that, The threaded rod (3) passes through the center of the threaded sleeve (2), and the threaded sleeve (2) is threadedly connected to the threaded rod (3).

4. The highway pavement friction testing device according to claim 1, characterized in that, The connecting plate (5) extends to the left side of the mounting frame (1), and the right sidewall of the connecting plate (5) is attached to the left sidewall of the mounting frame (1).

5. The highway pavement friction testing device according to claim 1, characterized in that, The connecting plate (5) has multiple sets of mounting holes on its front and rear sides, so that the mounting plate (7) can be fixedly installed at different heights on the left side of the connecting plate (5).

6. The highway pavement friction testing device according to claim 1, characterized in that, A speed sensor is installed at the bottom of the connecting crankshaft (10) to monitor the rotational speed of the tire (11).

7. The highway pavement friction testing device according to claim 1, characterized in that, A mudguard (13) is fixedly installed on the left end of the top of the connecting crankshaft (10), and the mudguard (13) is located on the outside of the top of the tire (11).

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