asphalt mixture rutting tester

Abstract

The utility model provides a kind of asphalt mixture rut testing machine, it includes: vertical support frame, plane moving device, lifting device, steering mechanism and asphalt mixture fixing device;Lifting device is located in vertical support frame inner frame top, lifting device output end connects lifting platform, and one end of lifting platform is slidably connected with plane multidirectional moving device;The output end of plane multidirectional moving device is equipped with steering mechanism, and plane multidirectional moving device is used to drive steering mechanism to move in X and Y direction relative to lifting platform;Steering mechanism below is equipped with pressure wheel;Vertical support frame bottom wall is opened and placed groove, and placed groove is used to place asphalt block to be tested, and vertical support frame is equipped with asphalt mixture fixing device located at the side of placed groove, the utility model is controlled by the cooperation of plane multidirectional moving device and steering mechanism, and pressure wheel can realize the arbitrary direction movement and angle deflection of plane trajectory, significantly improve the authenticity and data reliability of rut test.

Description

Technical Field

[0001] This utility model relates to a rutting test machine, specifically to an asphalt mixture rutting test machine. Background Technology

[0002] The rutting tester is a key piece of equipment for evaluating the rutting resistance of asphalt mixtures. It measures the rutting deformation depth by simulating the reciprocating rolling of wheels on asphalt pavement to evaluate the high-temperature stability of the material.

[0003] According to Chinese patent application number CN202322209584.0, an asphalt mixture rutting test machine includes a support mechanism, a specimen fixing mechanism, a rubber wheel, a lateral movement mechanism, and a longitudinal movement mechanism. The support mechanism is set on the ground and includes an insulated box. The specimen fixing mechanism is set inside the insulated box and fixes the mold carrying the specimen. The rubber wheel and the longitudinal movement mechanism are laterally slidable within the insulated box via the lateral movement mechanism, with both the rubber wheel and the longitudinal movement mechanism located above the specimen fixing mechanism. The rubber wheel is mounted on the longitudinal movement mechanism, which drives the rubber wheel to slide longitudinally. This single-direction mechanical transmission structure limits the X / Y direction movement range, making multi-directional precise adjustment difficult. Some parts of the device rely on manual operation, which easily introduces human error, resulting in poor repeatability of rutting tracks and affecting the reliability of test results. Furthermore, the lack of angle adjustment and compaction functions makes it easy for asphalt blocks to shift or loosen, leading to deviations in test data. Utility Model Content

[0004] This utility model aims to provide an asphalt mixture rutting test machine, which solves the problem that existing test machines can only move in the X or Y direction and cannot achieve precise adjustment of multi-directional movement. At the same time, they lack angle adjustment and compaction functions, and asphalt blocks are prone to displacement or loosening, resulting in deviations in test data.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides an asphalt mixture rutting test machine, comprising: a vertical support frame, a planar moving device, a lifting device, a steering mechanism, and an asphalt mixture fixing device;

[0006] The vertical support frame is fixed to the ground by four support legs;

[0007] The lifting device is located at the top of the inner frame of the vertical support frame. The output end of the lifting device is connected to the lifting platform, and a planar multi-directional moving device is slidably connected to one end of the lifting platform.

[0008] The output end of the planar multi-directional moving device is equipped with a steering mechanism, which is used to drive the steering mechanism to move relative to the lifting platform in the X and Y directions; a pressure roller is provided below the steering mechanism.

[0009] The bottom wall of the vertical support frame has a placement groove for placing the asphalt block to be tested. The vertical support frame is equipped with an asphalt mixture fixing device located next to the placement groove. The asphalt mixture fixing device is used to fix the asphalt block to be tested. The pressure roller is lowered by a lifting device to contact the asphalt block to be tested and generate ruts.

[0010] Preferably, the lifting device includes a hydraulic cylinder, which is mounted on a vertical support frame, and the lower end of the output end of the hydraulic cylinder is connected to the lifting platform.

[0011] Preferably, vertical guide cylinders are installed on both sides of the hydraulic cylinder, and each vertical guide cylinder extends into a vertical guide column, which is connected to the lifting platform.

[0012] Preferably, the planar multi-directional moving device includes: a drive motor, a moving frame, a guide wheel mechanism, a Y-direction guide rail, and an X-direction drive actuator. A Y-direction guide rail is provided at each end of the lifting platform. A slidable moving frame is mounted on the guide rail. A drive motor is mounted at one end of the moving frame, and the output end of the drive motor is connected to a traveling wheel. The drive motor drives the traveling wheel to move on one side of the Y-direction guide rail. A guide wheel mechanism is mounted at the other end of the moving frame, and the guide wheel mechanism has guide wheels that slide on the other side of the Y-direction guide rail. An X-direction drive actuator is also slidably connected to the moving frame.

[0013] Preferably, the X-direction drive actuator includes: a sliding frame, a servo motor, a first guide wheel, a second guide wheel, and a connecting shaft. The sliding frame is passed through by the movable frame and moves in the X direction under the guidance of the movable frame and the lifting platform. The inner wall of the sliding frame is equipped with a servo motor, and the output end of the servo motor is connected to the first guide wheel. The movable frame is provided with an X-direction guide rail located below the lifting platform. The servo motor is used to drive the first guide wheel to move on the X-direction guide rail. A connecting shaft is provided below the servo motor. Both ends of the connecting shaft are connected to the inner wall of the sliding frame. The second guide wheel is rotatably connected to the connecting shaft. The first guide wheel and the second guide wheel cooperate to clamp the movable frame.

[0014] Preferably, the lower end of the sliding frame is connected to a steering mechanism, which includes a steering motor, a rotating shaft, and a wheel housing. The outer housing of the steering motor is connected to the sliding frame, the steering motor drives the rotating shaft to rotate, the lower end of the rotating shaft is connected to the wheel housing, and the pressure roller is rotatably installed inside the wheel housing.

[0015] Preferably, the asphalt mixture fixing device includes a pressing mechanism and an angle control mechanism. Both the pressing mechanism and the angle control mechanism are installed next to the placement groove. The pressing mechanism presses the asphalt block to be tested into the placement groove through the pressing part. The angle control mechanism is used to control the pressing mechanism to lock or release the asphalt block to be tested.

[0016] Preferably, the clamping mechanism includes: a locking pin, a lifting plate, a screw, and a positioning shell. The positioning shell is disposed below the placement groove in the vertical support frame. The positioning shell is fixed to the lifting plate, and the lifting plate can move up and down relative to the vertical support frame.

[0017] There are four locking pins, which are located at the four corners of the placement slot. The locking pins can be raised and lowered relative to the vertical support frame and rotated around their own axis. The lower end of the locking pin passes through the bottom wall of the vertical support frame and is connected to the lifting plate. The locking pin can rotate relative to the lifting plate, but it cannot be raised or lowered relative to the lifting plate. One end of the lifting plate is connected to a rotatable screw, which is threaded to the positioning shell. An angle control mechanism is provided in the middle of the lifting plate.

[0018] Preferably, the angle control mechanism includes: a rotating shaft, a main gear, a driven gear, a positioning gear, and a positioning box. The vertical support frame is equipped with a rotatable rotating shaft, which passes through the positioning box and the lifting plate. The rotating shaft is connected to the main gear. The driven gear is fixed on a locking pin and is located between the vertical support frame and the lifting plate. Each driven gear meshes with the main gear. A positioning gear is sleeved on the rotating shaft. Gear teeth are fixed on the positioning box and can mesh with the positioning gear. When the locking pin is in the high position, the gear teeth disengage from the positioning gear.

[0019] Preferably, the locking pin includes a rotating column and a locking pin, wherein the rotating column rotatably passes through the bottom wall of the vertical support frame, and the locking pin is connected to the side of the rotating column.

[0020] Compared with existing technologies, this utility model has the following advantages: This asphalt mixture rutting test machine, through the coordinated control of a multi-directional planar movement device (X / Y axis bidirectional drive) and a steering mechanism, allows the pressure roller to move in any direction and deflect at any angle along the planar trajectory. Combined with the vertical pressure loading of the lifting device, it accurately simulates the complex stress state of actual road surfaces, significantly improving the realism and data reliability of the rutting test. The hydraulic cylinder, combined with the vertical guide column structure, ensures no deviation or vibration during the lifting process. The servo motor drive, combined with the double guide wheel clamping guide rail design, achieves micron-level positioning accuracy for movement in the X / Y directions. The modular combination of the guide wheel and guide rail further reduces mechanical wear and extends the equipment's service life. An asphalt mixture fixing device is provided next to the rotating trough. The main gear and driven gear in the angle control mechanism work together to rotate the locking pin relative to the placement trough, precisely controlling the locking pin to rotate above the asphalt block to be tested. By rotating the screw in the clamping mechanism, the lifting plate can be raised or lowered, firmly fixing the asphalt block to be tested in the placement trough and preventing asphalt slippage that could lead to inaccurate test data.

[0021] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an asphalt mixture rutting tester.

[0023] Figure 2 This is a partial schematic diagram of an asphalt mixture rutting tester.

[0024] Figure 3 This is a schematic diagram of an asphalt mixture fixing device.

[0025] Reference numerals: Vertical support frame 1, support foot 11, placement slot 12, planar moving device 2, drive motor 21, moving frame 22, guide wheel mechanism 23, guide wheel 231, Y-direction guide rail 24, X-direction drive actuator 25, sliding frame 251, servo motor 252, first guide wheel 253, second guide wheel 254, connecting shaft 255, traveling wheel 26, lifting device 3, hydraulic cylinder 31, vertical guide cylinder 32, vertical guide column 33, steering mechanism 4, pressure roller 41, steering motor 42, rotating shaft 43, wheel housing 44, asphalt mixture fixing device 5, pressing mechanism 51, locking pin 511, rotating column 5111, locking pin 5112, lifting plate 512, screw 513, positioning shell 514, angle control mechanism 52, rotating shaft 521, main gear 522, driven gear 523, positioning gear 524, positioning box 525, gear tooth 526, lifting platform 6. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 3As shown, this utility model proposes an asphalt mixture rutting test machine, including: a vertical support frame 1, a planar moving device 2, a lifting device 3, a steering mechanism 4, and an asphalt mixture fixing device 5; the vertical support frame 1 is fixed to the ground by four support legs 11; the lifting device 3 is located at the top of the inner frame of the vertical support frame 1, the output end of the lifting device 3 is connected to the lifting platform 6, one end of the lifting platform 6 is slidably connected to the planar multi-directional moving device, the output end of the planar multi-directional moving device is equipped with the steering mechanism 4, the planar multi-directional moving device is used to drive the steering mechanism 4 to move relative to the lifting platform 6 in the X and Y directions; a pressure roller 41 is provided below the steering mechanism 4; a placement groove 12 is opened on the bottom wall of the vertical support frame 1, the placement groove 12 is used to place the asphalt block to be tested, the vertical support frame 1 is equipped with the asphalt mixture fixing device 5 located next to the placement groove 12, the asphalt mixture fixing device 5 is used to fix the asphalt block to be tested, and the pressure roller 41 is lowered by the lifting device 3 to contact the asphalt block to be tested to generate ruts. The lifting device 3 controls the pressure roller 41 to descend and contact the asphalt block fixed in the placement groove 12. A multi-directional planar moving device drives the pressure roller 41 to move in the X and Y directions, while the steering mechanism 4 adjusts the direction of the pressure roller 41, simulating the effect of vehicle traffic on the asphalt pavement. Under continuous pressure and movement, the asphalt block deforms, forming ruts. The testing machine records parameters such as rut ​​depth through a measurement system, thereby evaluating the rutting resistance of the asphalt mixture.

[0028] The lifting device 3 includes a hydraulic cylinder 31, which is mounted on the vertical support frame 1. The lower end of the output end of the hydraulic cylinder 31 is connected to the lifting platform 6. The hydraulic cylinder 31 controls the lifting platform 6 to drive the pressure roller 41 to press down onto the asphalt block to be tested.

[0029] Vertical guide cylinders 32 are installed on both sides of the hydraulic cylinder 31. Each vertical guide cylinder 32 extends into a vertical guide column 33, which is connected to the lifting platform 6. The vertical guide cylinders 32 are used to prevent the lifting platform 6 from swaying when it descends.

[0030] The planar multi-directional moving device includes: a drive motor 21, a moving frame 22, a guide wheel mechanism 23, a Y-direction guide rail 24, and an X-direction drive actuator 25. A Y-direction guide rail 24 is provided at each end of the lifting platform 6. A sliding moving frame 22 is mounted on the guide rail. A drive motor 21 is mounted on one end of the moving frame 22. The output end of the drive motor 21 is connected to a traveling wheel 26. The drive motor 21 drives the traveling wheel 26 to travel on one side of the Y-direction guide rail 24. A guide wheel mechanism 23 is mounted on the other end of the moving frame 22. The guide wheel mechanism 23 has a guide wheel 231, which slides on the other side of the Y-direction guide rail 24. An X-direction drive actuator 25 is also slidably connected to the moving frame 22.

[0031] The planar multi-directional moving device drives the traveling wheel 26 to move on the Y-direction guide rail 24 via the drive motor 21. At the same time, the guide wheel 231 of the guide wheel mechanism 23 slides on the other side guide rail, realizing the smooth movement of the moving frame 22 in the Y direction. The moving frame 22 is also slidably connected to the X-direction drive actuator 25, which is used to realize the movement of the pressure wheel 41 in the X direction. Through the control of the drive motor 21, the device can accurately drive the pressure wheel 41 to move in the X and Y directions, simulating the multi-directional movement of vehicle tires on the asphalt road surface, thereby accurately evaluating the rutting resistance of the asphalt mixture.

[0032] The X-direction drive actuator 25 includes: a sliding frame 251, a servo motor 252, a first guide wheel 253, a second guide wheel 254, and a connecting shaft 255. The sliding frame 251 is passed through the movable frame 22. The sliding frame 251 moves in the X direction under the guidance of the movable frame 22 and the lifting platform 6. The servo motor 252 is installed on the inner wall of the sliding frame 251. The output end of the servo motor 252 is connected to the first guide wheel 253. The movable frame 22 is provided with an X-direction guide rail located below the lifting platform 6. The servo motor 252 is used to drive the first guide wheel 253 to move on the X-direction guide rail. A connecting shaft 255 is provided below the servo motor 252. Both ends of the connecting shaft 255 are connected to the inner wall of the sliding frame 251. The second guide wheel 254 is rotatably connected to the connecting shaft 255. The first guide wheel 253 and the second guide wheel 254 cooperate to clamp the movable frame 22. A servo motor 252 is installed on the inner wall of the sliding frame 251. Its output end is connected to the first guide wheel 253. The servo motor 252 drives the first guide wheel 253 to move on the X-direction guide rail below the moving frame 22, thereby driving the sliding frame 251 to move in the X direction. At the same time, the two ends of the connecting shaft 255 below the servo motor 252 are fixed on the inner wall of the sliding frame 251. The second guide wheel 254 is rotatably connected to the connecting shaft 255. The first guide wheel 253 and the second guide wheel 254 cooperate to clamp the moving frame 22, ensuring the stability and accuracy of the sliding frame 251 when moving in the X direction.

[0033] The lower end of the sliding frame 251 is connected to the steering mechanism 4. The steering mechanism 4 includes a steering motor 42, a rotating shaft 43, and a wheel housing 44. The outer shell of the steering motor 42 is connected to the sliding frame 251. The steering motor 42 drives the rotating shaft 43 to rotate. The lower end of the rotating shaft 43 is connected to the wheel housing 44. The pressure roller 41 is rotatably installed inside the wheel housing 44. The outer shell of the steering motor 42 is fixedly connected to the sliding frame 251. Its output end drives the rotating shaft 43 to rotate. The lower end of the rotating shaft 43 is connected to the wheel housing 44. The pressure roller 41 is rotatably installed inside the wheel housing 44. The direction of the pressure roller 41 is adjusted by the drive of the steering motor 42, thereby meeting the needs of different test paths and ensuring the accuracy and flexibility of the test.

[0034] The asphalt mixture fixing device 5 includes a clamping mechanism 51 and an angle control mechanism 52. Both the clamping mechanism 51 and the angle control mechanism 52 are installed beside the placement groove 12. The clamping mechanism 51 presses the asphalt block to be tested into the placement groove 12 through its clamping part. The angle control mechanism 52 controls the clamping mechanism 51 to lock or release the asphalt block to be tested. The clamping mechanism 51 firmly presses the asphalt block to be tested into the placement groove 12 through its clamping part, ensuring the stability of the asphalt block during the test. The angle control mechanism 52 controls the action of the clamping mechanism 51 to lock or release the asphalt block to be tested, allowing for convenient installation and removal of the asphalt block before and after the test.

[0035] The clamping mechanism 51 includes: locking pins 511, a lifting plate 512, a screw 513, and a positioning shell 514. The positioning shell 514 is located below the placement slot 12 in the vertical support frame 1 and is fixed to the lifting plate 512, which can move up and down relative to the vertical support frame 1. Four locking pins 511 are provided, located at the four corners of the placement slot 12. Each locking pin can move up and down relative to the vertical support frame 1 and rotate around its own axis. The lower end of each locking pin passes through the bottom wall of the vertical support frame 1 and connects to the lifting plate 512. Each locking pin can rotate relative to the lifting plate 512 but cannot move up or down relative to it. One end of the lifting plate 512 is connected to a rotatable screw 513, which is threaded to the positioning shell 514. An angle control mechanism 52 is located in the middle of the lifting plate 512. The positioning shell 514 is fixed inside the frame and connected to the lifting plate 512, which can move up and down. Four locking pins 511 are located at the four corners of the placement slot 12, and their lower ends are connected to the lifting plate 512. They can rotate but cannot be raised or lowered. The bottom of the lifting plate 512 is connected to a screw 513, which is threaded into the positioning housing 514. An angle control mechanism 52 is installed in the middle of the lifting plate 512 and is used to control the pressing and releasing of the locking pins 511.

[0036] The angle control mechanism 52 includes: a rotating shaft 521, a main gear 522, a driven gear 523, a positioning gear 524, and a positioning box 525. A rotatable rotating shaft 521 is mounted on the vertical support frame 1. The rotating shaft 521 passes through the positioning housing 514 and the lifting plate 512. The rotating shaft 521 is connected to the main gear 522. The driven gear 523 is fixed on a locking pin 511 and is located between the vertical support frame 1 and the lifting plate 512. Each driven gear 523 meshes with the main gear 522. A positioning gear 524 is sleeved on the rotating shaft 521. Gear teeth 526 are fixed on the positioning box 525 and can mesh with the positioning gear 524. When the locking pin 511 is in a high position, the gear teeth 526 disengage from the positioning gear 524. When it is necessary to adjust the angle of the locking pin 511, the rotating shaft 521 is driven to rotate, which in turn drives the main gear 522 to rotate. The main gear 522 meshes with multiple driven gears 523, thereby driving the driven gears 523 to rotate around the locking pin 511, thus adjusting the angle of the locking pin 511. When the locking pin 511 reaches the designated position, the positioning gear 524 meshes with the gear teeth 526 on the positioning box 525, fixing the position of the rotating shaft 521 and keeping the locking pin 511 at the current angle. If it is necessary to release the locking pin 511, the locking pin 511 is raised to the high position, causing the gear teeth 526 to disengage from the positioning gear 524. At this time, the rotating shaft 521 and the locking pin 511 can be readjusted.

[0037] The locking pin 511 includes a rotating column 5111 and a locking pin 5112. The rotating column 5111 rotatably passes through the bottom wall of the vertical support frame 1, and the locking pin 5112 is connected to the side of the rotating column 5111. The locking pin 5112 is rotated by the rotating column 5111 to be above the asphalt block to be tested in the placement groove 12. The pressing mechanism 51 presses the locking pin 5112 down onto the asphalt block to be tested, so as to prevent the asphalt block to be tested from shifting when the pressure roller 41 rolls on the asphalt block to be tested.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An asphalt mixture rutting tester, characterized in that, include: Vertical support frame (1), planar moving device (2), lifting device (3), steering mechanism (4) and asphalt mixture fixing device (5); The vertical support frame (1) is fixed to the ground by four support legs (11); The lifting device (3) is located at the top of the inner frame of the vertical support frame (1). The output end of the lifting device (3) is connected to the lifting platform (6). One end of the lifting platform (6) is slidably connected to a planar multi-directional moving device. A steering mechanism (4) is installed on the output end of the planar multi-directional moving device. The planar multi-directional moving device is used to drive the steering mechanism (4) to move relative to the lifting platform (6) in the X and Y directions. A pressure roller (41) is provided below the steering mechanism (4). The bottom wall of the vertical support frame (1) has a placement groove (12) for placing the asphalt block to be tested. The vertical support frame (1) is equipped with an asphalt mixture fixing device (5) located next to the placement groove (12). The asphalt mixture fixing device (5) is used to fix the asphalt block to be tested. The pressure roller (41) descends through the lifting device (3) to contact the asphalt block to be tested and generate ruts. The planar multi-directional moving device includes: a drive motor (21), a moving frame (22), a guide wheel mechanism (23), a Y-direction guide rail (24), and an X-direction drive actuator (25). Each end of the lifting platform (6) is provided with a Y-direction guide rail (24). A sliding moving frame (22) is installed on the guide rail. A drive motor (21) is installed on one end of the moving frame (22). The output end of the drive motor (21) is connected to a walking wheel (26). The drive motor (21) is used to drive the walking wheel (26) to walk on one side of the Y-direction guide rail (24). The other end of the moving frame (22) is provided with a guide wheel (231). The guide wheel (231) is provided with a guide wheel (231). The guide wheel (231) slides on the other side of the Y-direction guide rail (24). An X-direction drive actuator (25) is also slidably connected to the moving frame (22). The X-direction drive actuator (25) includes: a sliding frame (251), a servo motor (252), a first guide wheel (253), a second guide wheel (254), and a connecting shaft (255). The sliding frame (251) is passed through by the moving frame (22). The sliding frame (251) moves in the X direction under the guidance of the moving frame (22) and the lifting platform (6). The inner wall of the sliding frame (251) is equipped with a servo motor (252). The output end of the servo motor (252) is connected to the first guide wheel (253). The movable frame (22) is provided with an X-direction guide rail located below the lifting platform (6). The servo motor (252) is used to drive the first guide wheel (253) to move on the X-direction guide rail. A connecting shaft (255) is provided below the servo motor (252). The two ends of the connecting shaft (255) are connected to the inner wall of the sliding frame (251). A second guide wheel (254) is rotatably connected on the connecting shaft (255). The first guide wheel (253) and the second guide wheel (254) cooperate to clamp the movable frame (22). The lower end of the sliding frame (251) is connected to the steering mechanism (4). The steering mechanism (4) includes a steering motor (42), a rotating shaft (43), and a wheel housing (44). The outer shell of the steering motor (42) is connected to the sliding frame (251). The steering motor (42) drives the rotating shaft (43) to rotate. The lower end of the rotating shaft (43) is connected to the wheel housing (44). The pressure roller (41) is rotatably installed in the wheel housing (44).

2. The asphalt mixture rutting test machine according to claim 1, characterized in that, The lifting device (3) includes a hydraulic cylinder (31), which is mounted on a vertical support frame (1). The lower end of the output end of the hydraulic cylinder (31) is connected to the lifting platform (6).

3. The asphalt mixture rutting test machine according to claim 2, characterized in that, Vertical guide cylinders (32) are installed on both sides of the hydraulic cylinder (31). Each vertical guide cylinder (32) extends into a vertical guide column (33), which is connected to the lifting platform (6).

4. The asphalt mixture rutting tester according to any one of claims 1 to 3, characterized in that the asphalt... The mixture fixing device (5) includes a pressing mechanism (51) and an angle control mechanism (52). Both the pressing mechanism (51) and the angle control mechanism (52) are installed next to the placement groove (12). The pressing mechanism (51) presses the asphalt block to be tested into the placement groove (12) through the pressing part. The angle control mechanism (52) is used to control the pressing mechanism (51) to lock or release the asphalt block to be tested.

5. The asphalt mixture rutting test machine according to claim 4, characterized in that, The clamping mechanism (51) includes: a locking pin (511), a lifting plate (512), a screw (513) and a positioning shell (514). The positioning shell (514) is located below the placement groove (12) in the vertical support frame (1). The positioning shell (514) is fixed to the lifting plate (512). The lifting plate (512) can move up and down relative to the vertical support frame (1). There are four locking pins (511), which are respectively located at the four corners of the placement slot (12). The locking pins (511) can rise and fall relative to the vertical support frame (1) and rotate around their own axis. The lower end of the locking pin (511) passes through the bottom wall of the vertical support frame (1) and is connected to the lifting plate (512). The locking pin (511) can rotate relative to the lifting plate (512) but cannot rise or fall relative to the lifting plate (512). One end of the lifting plate (512) is connected to a rotatable screw (513). The screw (513) is threadedly connected to the positioning shell (514). An angle control mechanism (52) is provided in the middle of the lifting plate (512).

6. The asphalt mixture rutting test machine according to claim 5, characterized in that, The angle control mechanism (52) includes: a rotating shaft (521), a main gear (522), a driven gear (523), a positioning gear (524), and a positioning box (525). The vertical support frame (1) is equipped with a rotatable rotating shaft (521). The rotating shaft (521) passes through the positioning housing (514) and the lifting plate (512). The rotating shaft (521) is connected to the main gear (522), and the driven gear (523) is fixed on the locking pin (511). The driven gear (523) is located between the vertical support frame (1) and the lifting plate (512). Each driven gear (523) meshes with the main gear (522). A positioning gear (524) is sleeved on the rotating shaft (521). A gear tooth (526) is fixed on the positioning box (525). The gear tooth (526) can mesh with the positioning gear (524). When the locking pin (511) is in the high position, the gear tooth (526) disengages from the positioning gear (524).

7. The asphalt mixture rutting test machine according to claim 6, characterized in that, The locking pin (511) includes a rotating column (5111) and a locking pin (5112). The rotating column (5111) can rotatably pass through the bottom wall of the vertical support frame (1), and the locking pin (5112) is connected to the side of the rotating column (5111).

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