Anti-shearing equipment and method for asphalt pavement of high-speed loop in automobile test field

Abstract

The invention discloses an asphalt pavement anti-shearing device and method for a high-speed loop in an automobile test field, and relates to the technical field of asphalt pavement anti-shearing equipment. The asphalt pavement anti-shearing device comprises a box main body, an opening is formed in the bottom of the box main body, moving wheels are arranged at four corners of the box main body, and a guide device is arranged in the box main body; a shear-resistant device driven by a driving device is further arranged in the box body, the guiding device comprises a transverse sliding rail fixedly installed in the box body, a vertical guide rail is fixedly installed at one end of the transverse sliding rail, a reciprocating sliding block is slidably connected into the vertical guide rail, the shear-resistant device comprises a shear-resistant support, and one end of the shear-resistant support is rotationally connected with a shear-resistant testing wheel. The reciprocating sliding block slides in the vertical guide rail in a reciprocating manner in the vertical direction to drive the anti-shearing support to rotate synchronously, the angle and position of the anti-shearing testing wheel are adjusted, the anti-shearing testing wheel is made to make contact with the asphalt pavement, dynamic shearing force is applied, and the actual running working condition of vehicle tires on a high-speed loop is simulated. Therefore, the shear resistance of the asphalt pavement can be accurately evaluated.

Description

Technical Field

[0001] The present invention relates to the technical field of shear resistance equipment for asphalt pavements, and particularly relates to a shear resistance equipment and method for asphalt pavements on high-speed circular tracks in automobile test fields. Background Art

[0002] The high-speed circular track in an automobile test field is an important facility for testing the performance and durability of vehicles under high-speed driving conditions.

[0003] With the development of the automobile industry, the performance requirements for high-speed circular tracks in test fields are getting higher and higher. The shear strength of asphalt pavements is one of the key factors affecting the service life of circular tracks and the driving safety of vehicles. Traditional testing methods for the shear strength of asphalt pavements mainly rely on static tests in laboratories, such as direct shear tests, triaxial tests, etc. In the high-speed circular tracks of automobile test fields, the asphalt pavements need to bear the tangential force and centrifugal force of high-speed driving vehicles, and these forces will cause shear stress on the pavements, thereby accelerating the damage of the pavements.

[0004] However, most traditional testing methods are static tests and cannot simulate the dynamic shear force generated by high-speed driving vehicles on asphalt pavements. For example, direct shear tests and triaxial tests are usually carried out in laboratories, and static shear forces are applied. In actual high-speed circular tracks, the shear force of the wheels on the pavement is dynamic, periodic, and directional, and these dynamic loads cannot be accurately simulated, resulting in a deviation between the test results and the actual situation. Summary of the Invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a shear resistance equipment and method for asphalt pavements on high-speed circular tracks in automobile test fields. The problem to be solved is that in actual high-speed circular tracks, the shear force of the wheels on the pavement is dynamic, periodic, and directional, and the static shear force adopted by traditional equipment cannot accurately simulate these dynamic loads, resulting in a deviation between the test results and the actual situation.

[0007] To achieve the above object, the present invention provides the following technical solution: A shear resistance equipment and method for asphalt pavements on high-speed circular tracks in automobile test fields, including a box body. An opening is provided at the bottom of the box body. A hand push handle is fixedly installed on the outer side of the box body. Moving wheels are symmetrically arranged at the four corners of the box body. A guiding device for limiting sliding is provided in the box body. A shear resistance device driven by a driving device and slidably connected to the guiding device corresponding to the opening is also provided in the box body. A transmission device for synchronous transmission is slidably connected to the guiding device, and a cleaning device for cleaning dust is connected to the driving device through the transmission device;

[0008] The guide device comprises a transverse slide rail fixedly installed in the box body, a vertical guide rail vertically distributed to the transverse slide rail is fixedly installed at one end of the transverse slide rail close to the opening, a reciprocating slider is slidably connected in the vertical guide rail, and a connecting rod is hingedly connected to the reciprocating slider;

[0009] The anti-shear device comprises an anti-shear bracket located below the reciprocating slider, and an anti-shear test wheel for shear test is connected to one end of the anti-shear bracket away from the reciprocating slider, a first rotating shaft is fixedly installed in the anti-shear bracket, and an adjustment wheel for limiting rotation of the first rotating shaft is fixedly installed at one end of the first rotating shaft extending into the reciprocating slider, and positioning grooves distributed in a ring array around the first rotating shaft are opened on the adjustment wheel, a threaded shaft is threadedly connected to the reciprocating slider, and one end of the threaded shaft extending into the reciprocating slider is adapted to the positioning groove;

[0010] The box body is also provided with a detection body for detecting the wear of the shear resistance test wheel and a control body connected with the detection body by electrical signals and used for controlling the device.

[0011] As a preferred solution of the shear-resistant equipment and method for asphalt pavement of a high-speed ring track of an automobile testing ground described in the present invention, the driving device includes a driving motor fixedly installed in a box body, the output shaft of the driving motor is transmission-connected to an eccentric wheel, a protruding shaft is provided in the eccentric wheel, and an annular groove matching the protruding shaft is provided on the inner side of the eccentric wheel, the end of the protruding shaft away from the eccentric wheel is hingedly connected to a limiting rotating rod, and the end of the limiting rotating rod away from the protruding shaft is hingedly connected to the inner wall of the box body.

[0012] As a preferred solution of the shear-resistant equipment and method for asphalt pavement of a high-speed ring track of an automobile testing ground described in the present invention, the end of the limit rotating rod away from the inner wall of the box body is also hingedly connected to a power arm through a protruding shaft, an adjustment slide groove is provided on the power arm, and the end of the power arm away from the protruding shaft is hingedly connected to the end of the connecting rod away from the reciprocating slider.

[0013] As a preferred solution of the shear-resistant equipment and method for asphalt paving of a high-speed loop track of an automobile test field described in the present invention, the transmission device includes a transmission motor fixedly mounted on an end of a transverse slide rail away from a vertical guide rail, the output shaft of the transmission motor is transmission-connected with a transmission screw, the transverse slide rail is also slidably connected with a transmission slider located below the power arm, one end of the transmission screw extending into the transverse slide rail is threadedly connected to the transmission slider, and the top of the transmission slider is hingedly connected to an adjustment slider adapted to the adjustment slot.

[0014] As a preferred embodiment of the shear resistance device and method for the asphalt pavement of the high-speed loop in the automobile test site of the present invention, wherein: one end of the transmission slider extending outside the transverse slide rail is slidably connected to a synchronous shaft, and a pressure spring is sleeved outside the synchronous shaft and below the transmission slider.

[0015] As a preferred embodiment of the shear resistance device and method for the asphalt pavement of the high-speed loop in the automobile test site of the present invention, wherein: the cleaning device includes a cleaning guide rail fixedly installed on the vertical guide rail and distributed parallel to the transverse slide rail. First stop shafts and second stop shafts distributed in parallel are respectively fixedly installed at both ends of the cleaning guide rail, and a cleaning slider is also slidably connected in the cleaning guide rail. The cleaning slider is fixedly connected to one end of the synchronous shaft far from the transmission slider.

[0016] As a preferred embodiment of the shear resistance device and method for the asphalt pavement of the high-speed loop in the automobile test site of the present invention, wherein: first stop rods and second stop rods corresponding to the first stop shaft and the second stop shaft are respectively installed on the cleaning slider. A swing arm is also rotatably connected to the cleaning slider. A deflecting end in a protruding shape is arranged outside the swing arm. First scraping strips for cleaning dust are slidably connected to both ends of the swing arm, and a second scraping strip for cleaning dust is also arranged on the cleaning slider.

[0017] As a preferred embodiment of the shear resistance device and method for the asphalt pavement of the high-speed loop in the automobile test site of the present invention, wherein: a deflecting seat is also movably connected to the cleaning slider. A second rotating shaft is fixedly installed at the bottom of the deflecting seat, and the deflecting seat is rotatably connected to the cleaning slider through the second rotating shaft. A reset sliding rod is also slidably connected in the deflecting seat. One end of the reset sliding rod far from the deflecting seat is hinged to the deflecting end, and a reset spring is sleeved outside the reset sliding rod between the deflecting seat and the deflecting end.

[0018] A method for a shear resistance device of the asphalt pavement of the high-speed loop in the automobile test site, characterized by comprising the following steps:

[0019] Step 1, when the device needs to be used, first move the box body to the designated position in the test site, and move the device on the loop asphalt pavement through the hand push handle and the moving wheels. Align the opening of the box body with the test area of the asphalt pavement, and ensure that the opening is above the asphalt pavement to facilitate the shear resistance test.

[0020] Step 2, then start the driving motor through the driving device, drive the eccentric wheel to rotate. The eccentric wheel converts the rotational motion into a reciprocating motion through the protruding shaft and the limit rotating rod, drives the power arm to swing reciprocally, and the power arm transmits the motion to the reciprocating slider through the connecting rod, so that it reciprocally slides in the vertical guide rail, thereby driving the shear resistance test wheel of the shear resistance device to apply a dynamic shear force to the asphalt pavement.

[0021] Step 3: Adjust the shear test wheel to an appropriate angle and position, and make fine adjustments through the first rotating shaft and the adjusting wheel to ensure that the shear test wheel can simulate the movement of a normal tire. Then, fix the position of the shear test wheel through the cooperation of the threaded shaft and the positioning groove;

[0022] Step 4: Drive the transmission lead screw to rotate through the drive motor in the transmission device, and the transmission slider slides in the transverse slide rail. The adjusting slider on the transmission slider cooperates with the adjusting chute on the power arm to change the deflection fulcrum of the power arm, thereby adjusting the reciprocating movement path of the reciprocating slider to simulate the driving conditions of vehicles with different wheel diameters or different masses on the asphalt pavement;

[0023] Step 5: During the test, the transmission slider drives the cleaning slider to slide in the cleaning guide rail through the synchronizing shaft. The swing arm drives the first scraping strip and the second scraping strip to remove dust and impurities near the opening through the action of the deflection end and the return spring, ensuring the cleanliness of the test area;

[0024] Step 6: After the test is completed, the detection main body detects the wear condition of the shear test wheel through the internal sensing component and transmits the data to the control main body. The control main body analyzes according to the detection data to generate a shear performance report of the asphalt pavement, providing a scientific basis for the maintenance and management of the test site.

[0025] In summary, the present invention has at least one of the following beneficial effects:

[0026] 1. In the present invention, the reciprocating slider slides vertically in the vertical guide rail, driving the shear support to rotate synchronously, adjusting the angle and position of the shear test wheel, making it contact the asphalt pavement and applying a dynamic shear force, simulating the actual driving conditions of vehicle tires on the high-speed ring road, thereby achieving an accurate assessment of the shear performance of the asphalt pavement.

[0027] 2. In the present invention, the adjusting slider on the top of the transmission slider cooperates with the adjusting chute on the power arm to change the deflection fulcrum of the power arm, thereby adjusting the reciprocating movement path of the reciprocating slider to adapt to the dynamic load changes when vehicles with different wheel diameters or different masses drive on the asphalt pavement, achieving a comprehensive assessment of the shear performance of the asphalt pavement.

[0028] 3. In the present invention, the cleaning device uses the action of the deflection end and the return spring of the swing arm to drive the first scraping strip and the second scraping strip to remove dust, and through the cooperation of the second stop rod and the cleaning slider, it makes up for the cleaning dead angle, realizing the synchronous removal of dust and impurities near the opening of the asphalt pavement during the test, ensuring the cleanliness of the test area, and avoiding the interference of dust on the test results.

[0029] 4. By simulating the reciprocating motion of the actual high-speed loop dynamic load through the shear test wheel, and through the function operation and analysis by the control body based on the wear degree detected by the detection body, the accurate test of the anti-shear performance of the asphalt pavement is realized, thus avoiding damaging the asphalt pavement of the high-speed loop in the automobile test site. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0031] Figure 1 Schematic three-dimensional structure diagram of the present invention;

[0032] Figure 2 Schematic perspective sectional view of the present invention;

[0033] Figure 3 Schematic cross-sectional structure diagram of the present invention;

[0034] Figure 4 Schematic structure diagram of the shear device and the guiding device of the present invention after assembly;

[0035] Figure 5 Schematic perspective sectional view of the shear device and the guiding device of the present invention after assembly;

[0036] Figure 6 For the present invention Figure 5 Schematic enlarged structure diagram of part A;

[0037] Figure 7 Schematic structure diagram of the cleaning device of the present invention;

[0038] Figure 8 Schematic assembly structure diagram of the cleaning slider and the swing arm of the present invention;

[0039] Figure 9 Function relation diagram of the wear degree and the friction coefficient of the present invention;

[0040] Figure 10 Function relation diagram of the shear strength and the wear degree of the present invention.

[0041] Explanation of the reference numerals:

[0042] 1. Box body; 101. Opening; 102. Push handle; 2. Moving wheel; 3. Guiding device; 301. Horizontal slide rail; 302. Vertical guide rail; 303. Reciprocating slider; 304. Connecting rod; 4. Shear resistance device; 401. Shear resistance bracket; 402. Shear resistance test wheel; 403. First rotating shaft; 404. Adjusting wheel; 4041. Positioning groove; 405. Threaded shaft; 5. Driving device; 501. Driving motor; 502. Eccentric wheel; 503. Protruding shaft; 504. Limit rotating rod; 505. Power arm; 5051. Adjusting chute; 6. Transmission device; 601. Transmission motor; 602. Transmission lead screw; 603. Transmission slider; 604. Adjusting slider; 605. Synchronous shaft; 606. Pressure spring; 7. Cleaning device; 701. Cleaning guide rail; 7011. First stop shaft; 7012. Second stop shaft; 702. Cleaning slider; 7021. First stop rod; 7022. Second stop rod; 703. Swing arm; 7031. Deflection end; 7032. First scraping strip; 704. Second scraping strip; 705. Deflection seat; 7051. Second rotating shaft; 7052. Reset slide bar; 7053. Reset spring; 8. Detection body; 9. Control body. Detailed implementation mode

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] The embodiment of the present invention discloses a shear resistance device and method for the asphalt pavement of the high-speed loop of an automobile test site.

[0045] Embodiment 1

[0046] Refer to Figures 1-6, which is the first embodiment of the present invention, provides a shear resistance device and method for the asphalt pavement of the high-speed loop in an automobile test site. This shear resistance device and method for the asphalt pavement of the high-speed loop in an automobile test site include a box body 1. An opening 101 is formed at the bottom of the box body 1. A hand push handle 102 is fixedly installed on the outer side of the box body 1. Moving wheels 2 are symmetrically distributed at the four corners of the box body 1. A guiding device 3 for limiting sliding is provided in the box body 1. A shear resistance device 4 driven by a driving device 5 and slidably connected to the guiding device 3 and corresponding to the opening 101 is also provided in the box body 1. A transmission device 6 for synchronous transmission is slidably connected to the guiding device 3. And the driving device 5 is connected with a cleaning device 7 for cleaning dust through the transmission device 6. The guiding device 3 includes a horizontal slide rail 301 fixedly installed in the box body 1. A vertical guide rail 302 perpendicular to the horizontal slide rail 301 is fixedly installed at one end of the horizontal slide rail 301 close to the opening 101. A reciprocating slider 303 is slidably connected in the vertical guide rail 302. A connecting rod 304 is hinged to the reciprocating slider 303. The shear resistance device 4 includes a shear resistance bracket 401 located below the reciprocating slider 303. And a shear resistance test wheel 402 for shear resistance test is rotatably connected to one end of the shear resistance bracket 401 away from the reciprocating slider 303. A first rotating shaft 403 is also fixedly installed in the shear resistance bracket 401. And a regulating wheel 404 for limiting the rotation of the first rotating shaft 403 is fixedly installed at one end of the first rotating shaft 403 extending into the reciprocating slider 303. And a positioning groove 4041 distributed in an annular array around the first rotating shaft 403 is formed in the regulating wheel 404. A threaded shaft 405 is also threadedly connected in the reciprocating slider 303. And one end of the threaded shaft 405 extending into the reciprocating slider 303 is adapted to the positioning groove 4041. A detection body 8 for detecting the wear of the shear resistance test wheel 402 and a control body 9 electrically connected to the detection body 8 and used for controlling the device are also provided in the box body 1. The box body 1 is the frame structure of the whole device. Through the opening 101, it is used to contact the asphalt pavement to facilitate the shear resistance test on the high-speed loop asphalt ground. The hand push handle 102 facilitates the operator to move the device. And through the moving wheels 2, the device can move on the asphalt ground, ensuring the flexibility and mobility of the device. Triangular reinforcing ribs are provided between the horizontal slide rail 301 and the vertical guide rail 302, so as to ensure the stability of the vertical guide rail 302 even when it is suspended at the opening 101. The reciprocating slider 303 can slide vertically under the restriction of the vertical guide rail 302. And through the connecting rod 304, the motion of the driving device 5 is transmitted, so as to realize the reciprocating motion of the reciprocating slider 303 on the vertical guide rail 302 and simulate the dynamic shear state. The shear resistance bracket 401 is used to support the shear resistance test wheel 402, so that the shear resistance test wheel 402 can rotate on the asphalt pavement and simulate the normal tire movement. The shear resistance test wheel 402 is used to directly contact the asphalt pavement, apply a shear force and detect the shear resistance performance. The first rotating shaft 403 can rotate in the reciprocating slider 303 with the regulating wheel 404,And drive the shear bracket 401 to rotate synchronously, adjust the angle and position of the shear test wheel 402, simulate normal tire steering, and the threaded shaft 405 can be connected with the positioning groove 4041 after the position adjustment is completed, so as to ensure the stability and accuracy of the shear test wheel 402. The detection body 8 can detect the wear of the shear test wheel 402 after the simulation through the built-in sensor component, so as to analyze the shear data of the asphalt pavement according to the mathematical formula and function model. The control body 9 is connected to the detection body 8 by electrical signals and is used to control the operation of the entire equipment, including the operation of all the live structures of the driving device 5, the transmission device 6 and the cleaning device 7.

[0047] The driving device 5 includes a driving motor 501 fixedly installed in the box body 1, and the output shaft of the driving motor 501 is connected to the eccentric wheel 502. The eccentric wheel 502 is provided with a protruding shaft 503, and the inner side of the eccentric wheel 502 is provided with an annular groove adapted to the protruding shaft 503. The end of the protruding shaft 503 away from the eccentric wheel 502 is hingedly connected to a limiting rotating rod 504, and the end of the limiting rotating rod 504 away from the protruding shaft 503 is hingedly connected to the inner wall of the box body 1. The driving motor 501 can drive the eccentric wheel 502 to rotate, and convert the rotational motion into reciprocating motion through the eccentric design. The protruding shaft 503 cooperates with the eccentric wheel 502 through the annular groove to transmit the motion. The limiting rotating rod 504 is used to limit the range of motion of the protruding shaft 503 in the annular groove in the eccentric wheel 502 to promote the conversion of reciprocating motion.

[0048] The end of the limiting rotating rod 504 away from the inner wall of the box body 1 is also hingedly connected to the power arm 505 through the protruding shaft 503, and an adjusting slide groove 5051 is provided on the power arm 505, and the end of the power arm 505 away from the protruding shaft 503 is hingedly connected to the end of the connecting rod 304 away from the reciprocating slider 303. The power arm 505 is connected to the eccentric wheel 502 through the protruding shaft 503, and can transmit the movement of the eccentric wheel 502 to the connecting rod 304 under the restriction of the limiting rotating rod 504, thereby transmitting the movement of the power arm 505 to the reciprocating slider 303 through the connecting rod 304, thereby realizing the reciprocating motion of the shear resistance device 4.

[0049] During use, grasp the hand push handle 102 and transfer the opening 101 to the asphalt pavement of the high-speed loop of the automobile test field through the moving wheels 2 under the box body 1. Then, transmit the power to the connecting rod 304 through the driving device 5, and further drive the reciprocating slider 303 to slide vertically in the vertical guide rail 302. Under the restriction of the adjusting wheel 404, the first rotating shaft 403 rotates in the reciprocating slider 303 and drives the shear-resistant support 401 to rotate synchronously, adjusting the direction of the shear-resistant test wheel 402 that directly contacts the asphalt pavement to simulate the steering of a normal tire. The threaded shaft 405 is clamped with the positioning groove 4041 in the adjusting wheel 404 to achieve the stability and accuracy of the shear-resistant test wheel 402, ensuring that the angle and position of the shear-resistant test wheel 402 remain stable after adjustment. Thus, compared with the static shear-resistant method in traditional laboratories, it applies a dynamic shear force to the asphalt pavement and simulates the actual driving conditions of vehicle tires on the high-speed loop.

[0050] Embodiment 2

[0051] Refer to Figures 1-8 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is as follows:

[0052] The transmission device 6 includes a transmission motor 601 fixedly installed at one end of the transverse slide rail 301 away from the vertical guide rail 302. The output shaft of the transmission motor 601 is drivingly connected with a transmission lead screw 602. A transmission slider 603 is also slidably connected to the transverse slide rail 301 and located below the power arm 505. One end of the transmission lead screw 602 extending into the transverse slide rail 301 is in threaded fit with the transmission slider 603. The top of the transmission slider 603 is hinged with an adjusting slider 604 adapted to the adjusting chute 5051. The transmission motor 601 can drive the transmission lead screw 602 to rotate in the transverse slide rail 301. The transmission slider 603 drives the transmission slider 603 to slide along the transverse slide rail 301 through threaded fit. The adjusting slider 604 can move synchronously with the transmission slider 603 and, by cooperating with the adjusting chute 5051 on the power arm 505, change the fulcrum when the power arm 505 deflects, realizing the adjustment and synchronization of the reciprocating movement of the reciprocating slider 303. Moreover, as the distance between the transmission slider 603 and the transmission motor 601 increases, the reciprocating movement path of the reciprocating slider 303 gradually decreases, thereby simulating the driving of vehicles with different wheel diameters or different masses on the asphalt road surface.

[0053] One end of the transmission slider 603 extending outside the transverse slide rail 301 is slidably connected with a synchronous shaft 605. A compression spring 606 is sleeved outside the synchronous shaft 605 and below the transmission slider 603. The synchronous shaft 605 is used to connect the cleaning device 7 to achieve synchronous movement, and the compression spring 606 is used to continuously provide a downward pressure to ensure the smoothness and reliability of the movement of the cleaning device 7.

[0054] The cleaning device 7 includes a cleaning guide rail 701 fixedly installed on the vertical guide rail 302 and distributed in parallel with the horizontal slide rail 301. The two ends of the cleaning guide rail 701 are respectively fixedly installed with a first stop shaft 7011 and a second stop shaft 7012 distributed in parallel. A cleaning slider 702 is also slidably connected in the cleaning guide rail 701. The cleaning slider 702 is fixedly connected to the end of the synchronous shaft 605 away from the transmission slider 603. The cleaning guide rail 701 mainly provides a sliding path for the cleaning slider 702. The first stop shaft 7011 and the second stop shaft 7012 are used to limit the movement range of the cleaning slider 702. The cleaning slider 702 is synchronously moved with the transmission slider 603 through the synchronous shaft 605.

[0055] The cleaning slider 702 is also respectively installed with a first stop rod 7021 and a second stop rod 7022 corresponding to the first stop shaft 7011 and the second stop shaft 7012. A swing arm 703 is also rotatably connected to the cleaning slider 702. A protruding deflection end 7031 is provided outside the swing arm 703. The two ends of the swing arm 703 are both slidably connected with a first scraping strip 7032 for cleaning dust. A second scraping strip 704 for cleaning dust is also provided on the cleaning slider 702. The first stop rod 7021 and the second stop rod 7022 can limit the rotation amplitude of the swing arm 703 on the cleaning slider 702, and scrape the dust entering near the opening 101 through the first scraping strip 7032, and make up for the cleaning dead angle existing in the first scraping strip 7032 through the second scraping strip 704.

[0056] A deflection seat 705 is also movably connected to the cleaning slider 702. A second rotating shaft 7051 is fixedly installed at the bottom of the deflection seat 705, and the deflection seat 705 is rotationally connected to the cleaning slider 702 through the second rotating shaft 7051. A reset sliding rod 7052 is also slidably connected in the deflection seat 705. One end of the reset sliding rod 7052 away from the deflection seat 705 is hinged to the deflection end 7031. A reset spring 7053 is sleeved outside the reset sliding rod 7052 between the deflection seat 705 and the deflection end 7031. The deflection seat 705 can rotate on the cleaning slider 702 through the second rotating shaft 7051, so that the reset sliding rod 7052 can slide in the deflection seat 705, adapt to the angle after the deflection of the deflection end 7031, and through the extension of the reset spring 7053, promote the deflection end 7031 to drive the swing arm 703 to complete the deflection, and finally contact the first stop lever 7021, thereby applying a deflecting thrust to the swing arm 703, so that the first scraping strip 7032 can discharge the scraped dust through the opening 101 again. And as the cleaning slider 702 moves, when the swing arm 703 contacts the first stop shaft 7011, the swing arm 703 deflects in the opposite direction, and the spring changes from the extended state to the compressed state. After the deflection is completed, it changes back to the extended state again, so that the swing arm 703 contacts the second stop lever 7022, and deflects in the opposite direction when contacting the second stop shaft 7012, so as to realize the cleaning of the dust on both sides of the opening 101.

[0057] During the shear test, the specific driving state of the driving device 5 is that the driving motor 501 in the driving device 5 starts, drives the eccentric wheel 502 to rotate. The eccentric wheel 502 cooperates with the protruding shaft 503 through the annular groove inside it, converts the rotational motion into a reciprocating motion. This reciprocating motion is transmitted to the connecting rod 304 through the restriction of the limit rotating rod 504 and the power arm 505, and then drives the reciprocating slider 303 to perform a reciprocating vertical sliding in the vertical guide rail 302. During this process, the driving motor 601 in the transmission device 6 drives the transmission screw rod 602 to rotate, and through the thread fit, pushes the transmission slider 603 to slide along the transverse slide rail 301. The adjustment slider 604 on the top of the transmission slider 603 cooperates with the adjustment chute 5051 on the power arm 505 to change the deflection fulcrum of the power arm 505, so as to adjust the reciprocating motion path of the reciprocating slider 303 to adapt to the dynamic load changes when vehicles with different wheel diameters or different masses are driving on the asphalt road surface. At the same time, the transmission slider 603 drives the cleaning slider 702 in the cleaning device 7 to move synchronously through the synchronizing shaft 605. The cleaning slider 702 slides in the cleaning guide rail 701. The swing arm 703 on it drives the first scraping strip 7032 and the second scraping strip 704 to remove the dust and impurities near the opening 101 through the action of the deflection end 7031 and the reset spring 7053, ensuring the cleanliness of the test area and avoiding the interference of dust on the test results.

[0058] The detection main body 8 detects the wear condition of the shear test wheel 402 after the test through the internal sensing component, and transmits the relevant data to the control main body 9. The control main body 9 analyzes and processes the received detection data to generate a shear performance report of the asphalt pavement, providing a scientific basis for the maintenance and management of the test site. At the same time, the control main body 9 is also responsible for controlling the operations of all the electrified structures in the driving device 5, the transmission device 6, and the cleaning device 7, ensuring the coordinated operation of the entire equipment and realizing the automation and accuracy of the test process.

[0059] And it is worth noting that the principle of data analysis for the shear resistance of the asphalt pavement by detecting the wear condition of the shear test wheel 402 is explained as follows:

[0060] The functional relationship between the wear degree and the friction coefficient: According to the friction theory, there may be a non-linear relationship between the friction coefficient (μ) and the wear degree (W) of the wheel surface and the road surface. For example, the friction coefficient decreases with the increase of the wear degree, which can be described by a decay function. Refer to the appendix Figure 9 , where K 0 is the initial wear decay coefficient and W is the wear degree.

[0061] The functional relationship between the shear strength and the wear: The shear strength (τ) of the asphalt pavement and the wear degree (W) of the shear test wheel can also obtain an empirical function through fitting of experimental data. Refer to the appendix Figure 10 , where τ 0 is the initial shear strength, and a and b are fitting parameters.

[0062] The remaining structures are the same as those in Embodiment 1.

[0063] A method for an anti-shear device of the asphalt pavement on the high-speed loop of an automobile test site includes the following steps:

[0064] Step 1, when the device needs to be used, first move the box main body 1 to the designated position on the test site. Move the device on the loop asphalt pavement through the hand push handle 102 and the moving wheels 2, and align the opening 101 of the box main body 1 with the test area of the asphalt pavement, ensuring that the opening 101 is above the asphalt pavement for easy shear test;

[0065] Step 2, then start the driving motor 501 through the driving device 5. The eccentric wheel 502 rotates, and the eccentric wheel 502 converts the rotational motion into a reciprocating motion through the protruding shaft 503 and the limit rotating rod 504, driving the power arm 505 to swing reciprocally. The power arm 505 transmits the motion to the reciprocating slider 303 through the connecting rod 304, making it reciprocally slide in the vertical guide rail 302, thereby driving the shear test wheel 402 of the shear device 4 to apply a dynamic shear force to the asphalt pavement;

[0066] Step 3: Adjust the shear test wheel 402 to an appropriate angle and position, and make fine adjustments through the first rotating shaft 403 and the adjusting wheel 404 to ensure that the shear test wheel 402 can simulate the movement of a normal tire. Then, fix the position of the shear test wheel 402 by matching the threaded shaft 405 with the positioning groove 4041;

[0067] Step 4: Drive the transmission lead screw 602 to rotate through the drive motor 601 in the transmission device 6, and the transmission slider 603 slides in the transverse slide rail 301. The adjusting slider 604 cooperates with the adjusting chute 5051 on the power arm 505 to change the deflection fulcrum of the power arm 505, thereby adjusting the reciprocating movement path of the reciprocating slider 303 to simulate the driving conditions of vehicles with different wheel diameters or different masses on the asphalt pavement;

[0068] Step 5: During the test, the transmission slider 603 drives the cleaning slider 702 to slide in the cleaning guide rail 701 through the synchronous shaft 605. The swing arm 703 drives the first scraping strip 7032 and the second scraping strip 704 to remove the dust and impurities near the opening 101 under the action of the deflection end 7031 and the return spring 7053 to ensure the cleanliness of the test area;

[0069] Step 6: After the test is completed, the detection body 8 detects the wear condition of the shear test wheel 402 through the internal sensing component and transmits the data to the control body 9. The control body 9 analyzes according to the detection data and generates a shear performance report of the asphalt pavement to provide a scientific basis for the maintenance and management of the test site.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A shear-resistant device and method for asphalt pavement of a high-speed loop road in an automobile test field, characterized in that: The box body (1) comprises a box main body (1), the bottom of which is provided with an opening (101), the outer side of which is also fixedly provided with a push handle (102), the four corners of which are provided with symmetrically distributed moving wheels (2), the box main body (1) is provided with a guide device (3) for limited sliding, the box main body (1) is also provided with an anti-shear device (4) driven by a driving device (5) and slidably connected to the guide device (3) and corresponding to the opening (101), the guide device (3) is also slidably connected to a transmission device (6) for synchronous transmission, and the driving device (5) is connected to a cleaning device (7) for cleaning dust via the transmission device (6); The guide device (3) comprises a transverse slide rail (301) fixedly installed in the box body (1); a vertical guide rail (302) vertically distributed to the transverse slide rail (301) is fixedly installed at one end of the transverse slide rail (301) close to the opening (101); a reciprocating slider (303) is slidably connected to the vertical guide rail (302); and a connecting rod (304) is hingedly connected to the reciprocating slider (303); The anti-shear device (4) comprises an anti-shear bracket (401) located below the reciprocating slider (303), and an end of the anti-shear bracket (401) away from the reciprocating slider (303) is connected to a shear test wheel (402) for shear test, a first rotating shaft (403) is fixedly installed in the anti-shear bracket (401), and an end of the first rotating shaft (403) extending into the reciprocating slider (303) is fixedly installed with an adjusting wheel (404) for limiting rotation of the first rotating shaft (403), and the adjusting wheel (404) is provided with positioning grooves (4041) distributed in a ring array around the first rotating shaft (403), and a threaded shaft (405) is threadedly connected to the reciprocating slider (303), and one end of the threaded shaft (405) extending into the reciprocating slider (303) is matched with the positioning groove (4041); The box body (1) is also provided with a detection body (8) for detecting the wear of the shear resistance test wheel (402) and a control body (9) connected to the detection body (8) by electrical signals and used for controlling the device.

2. The anti-shear device and method for asphalt pavement of a high-speed loop road of an automobile testing ground according to claim 1 is characterized in that: The driving device (5) comprises a driving motor (501) fixedly mounted in the box body (1); the output shaft of the driving motor (501) is drivingly connected to an eccentric wheel (502); a protruding shaft (503) is provided in the eccentric wheel (502); and an annular groove matching the protruding shaft (503) is provided on the inner side of the eccentric wheel (502); one end of the protruding shaft (503) away from the eccentric wheel (502) is hingedly connected to a limiting rotating rod (504); and one end of the limiting rotating rod (504) away from the protruding shaft (503) is hingedly connected to the inner wall of the box body (1).

3. The anti-shear device and method for asphalt pavement of a high-speed loop road of an automobile testing ground according to claim 2 is characterized in that: The end of the limit rotating rod (504) away from the inner wall of the box body (1) is also hingedly connected to a power arm (505) through a protruding shaft (503), and an adjustment sliding groove (5051) is provided on the power arm (505). The end of the power arm (505) away from the protruding shaft (503) is hingedly connected to the end of the connecting rod (304) away from the reciprocating slider (303).

4. The anti-shear device and method for asphalt pavement of a high-speed loop road of an automobile testing ground according to claim 1 is characterized in that: The transmission device (6) comprises a transmission motor (601) fixedly mounted on one end of the transverse slide rail (301) away from the vertical guide rail (302); the output shaft of the transmission motor (601) is transmission-connected with a transmission screw (602); the transverse slide rail (301) is also slidably connected with a transmission slider (603) located below the power arm (505); one end of the transmission screw (602) extending into the transverse slide rail (301) is threadedly connected to the transmission slider (603); the top of the transmission slider (603) is hingedly connected with an adjustment slider (604) adapted to the adjustment slot (5051).

5. The anti-shear device and method for asphalt pavement of a high-speed loop road of an automobile testing ground according to claim 4 is characterized in that: One end of the transmission slider (603) extending outside the transverse slide rail (301) is slidably connected to a synchronization shaft (605), and a pressure spring (606) is sleeved on the outside of the synchronization shaft (605) and below the transmission slider (603).

6. The anti-shear device and method for asphalt pavement of a high-speed loop road of an automobile testing ground according to claim 1 is characterized in that: The cleaning device (7) comprises a cleaning guide rail (701) fixedly mounted on the vertical guide rail (302) and arranged in parallel with the transverse guide rail (301), a first stop shaft (7011) and a second stop shaft (7012) arranged in parallel are respectively fixedly mounted at both ends of the cleaning guide rail (701), and a cleaning slider (702) is also slidably connected in the cleaning guide rail (701), and the cleaning slider (702) is fixedly connected to one end of the synchronization shaft (605) away from the transmission slider (603).

7. The anti-shear device and method for asphalt pavement of a high-speed loop road in a vehicle testing ground according to claim 6 is characterized in that: The cleaning slider (702) is also respectively provided with a first gear rod (7021) and a second gear rod (7022) corresponding to the first gear shaft (7011) and the second gear shaft (7012); the cleaning slider (702) is also rotatably connected with a swing arm (703); the swing arm (703) is provided with a protruding deflection end (7031) on the outside; both ends of the swing arm (703) are slidably connected with a first scraper bar (7032) for cleaning dust; the cleaning slider (702) is also provided with a second scraper bar (704) for cleaning dust.

8. The anti-shear device and method for asphalt pavement of a high-speed loop road in a vehicle testing ground according to claim 7 is characterized in that: The cleaning slider (702) is also movably connected to a deflection seat (705), a second rotating shaft (7051) is fixedly installed at the bottom of the deflection seat (705), and the deflection seat (705) is rotatably connected to the cleaning slider (702) via the second rotating shaft (7051), and a reset slide bar (7052) is also slidably connected to the deflection seat (705), and one end of the reset slide bar (7052) away from the deflection seat (705) is hingedly connected to the deflection end (7031), and a reset spring (7053) is provided between the deflection seat (705) and the deflection end (7031) and on the outer sleeve of the reset slide bar (7052).

9. The anti-shear device and method for asphalt pavement of a high-speed loop road in an automobile testing ground according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: When the device is needed, first move the box body (1) to a designated position of the test site, move the device on the asphalt pavement of the loop through the push handle (102) and the moving wheels (2), align the opening (101) of the box body (1) with the test area of ​​the asphalt pavement, and ensure that the opening (101) is located above the asphalt pavement to facilitate the shear test; Step 2: Start the driving motor (501) through the driving device (5) to drive the eccentric wheel (502) to rotate. The eccentric wheel (502) converts the rotational motion into reciprocating motion through the protruding shaft (503) and the limit rotating rod (504), driving the power arm (505) to swing back and forth. The power arm (505) transmits the motion to the reciprocating slider (303) through the connecting rod (304), causing it to slide back and forth in the vertical guide rail (302), thereby driving the shear test wheel (402) of the shear device (4) to apply dynamic shear force to the asphalt pavement. Step three, adjust the shear test wheel (402) to a suitable angle and position, perform fine adjustment through the first rotating shaft (403) and the adjusting wheel (404), ensure that the shear test wheel (402) can simulate the movement of a normal tire, and fix the position of the shear test wheel (402) by cooperating with the positioning groove (4041) through the threaded shaft (405); Step 4: The transmission motor (601) in the transmission device (6) drives the transmission screw (602) to rotate, the transmission slider (603) slides in the transverse slide rail (301), and the adjustment slider (604) cooperates with the adjustment slide groove (5051) on the power arm (505) to change the deflection fulcrum of the power arm (505), thereby adjusting the reciprocating motion path of the reciprocating slider (303) to simulate the working condition of vehicles with different wheel diameters or different masses driving on an asphalt road surface; Step 5: During the test, the transmission slider (603) drives the cleaning slider (702) to slide in the cleaning guide rail (701) through the synchronization shaft (605), and the swing arm (703) drives the first scraper (7032) and the second scraper (704) to remove dust and impurities near the opening (101) through the action of the deflection end (7031) and the return spring (7053), thereby ensuring the cleanliness of the test area; Step six, after the test is completed, the detection body (8) detects the wear of the shear test wheel (402) through the built-in sensor component, and transmits the data to the control body (9). The control body (9) analyzes the detection data and generates a shear performance report of the asphalt pavement, providing a scientific basis for the maintenance and management of the test site.

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