Material taking device for detecting compaction degree in road test

Abstract

The utility model relates to the related technical field of road test detection, in particular to a material taking device for detecting the compactness in a road test, which comprises a bottom plate, a through hole is formed in the center of the bottom plate, a portal frame is fixedly connected to the top of the bottom plate, and a lifting frame is arranged in the portal frame. Under the matching action of the bottom plate, the through hole, the portal frame, the lifting frame, the transmission rod, the sampling barrels, the cutting teeth and the material returning mechanism, a user can control the two sampling barrels to be separated during sampling, the friction force between a sample and the inner walls of the sampling barrels is reduced while the two sampling barrels are separated, and the sampling efficiency is improved. According to the material taking device for detecting the compaction degree of the road test, the two sampling barrels can automatically fall off to achieve the purpose of material returning while being separated, the working efficiency of sampling is improved, and the problems that as an unloading screw of an existing material taking device for detecting the compaction degree of the road test moves downwards slowly in a rotating mode, a sample in the sampling barrels is pushed slowly by an unloading push plate, and the sampling efficiency is low are solved. And the working efficiency of sampling is relatively low.

Description

Technical Field

[0001] The utility model relates to the technical field of highway test detection, in particular to a device for taking samples of highway test detection compaction degree. Background Technique

[0002] The device for taking samples of highway test detection compaction degree is generally a sampling device for obtaining highway engineering samples after the base layer of highway construction projects is compacted, so as to conduct highway compaction degree detection, thereby judging whether the quality of highway construction meets the standards.

[0003] The utility model patent with the publication number of CN216771132U discloses a device for taking samples of highway test detection compaction degree, belonging to the technical field of highway test detection, aiming to solve the problem that in the prior art, when unloading the samples after sampling, the sample plate is easily stuck, which affects the unloading efficiency of the samples and also affects the sampling effect of the samples, and it is difficult to meet the existing use requirements. It includes a mounting frame, the top end of the mounting frame is fixedly installed with a hydraulic rod, the bottom end of the mounting frame is symmetrically and fixedly connected with bottom plates, sliding grooves are opened on both inner walls of the two ends of the mounting frame, the bottom end of the hydraulic rod is fixedly connected with a sliding plate, a connecting frame is fixedly installed at the bottom end of the sliding plate, and a sampling motor is fixedly installed at the bottom end of the sliding plate. The structure of this utility model is scientific and reasonable. Through the convenient feeding and unloading mechanism set, the highway can be quickly and conveniently sampled and unloaded, improving the feeding and unloading convenience when the device for taking samples of highway test detection compaction degree is used. Through the portable moving and fixing mechanism set, the moving convenience when the sampling device is used is improved, and it is also convenient for the installation and fixing when the sampling device is used, increasing the placement stability when the sampling device is used.

[0004] However, the above patent still has deficiencies: Although this patent can unload the sampled samples of the highway, since the unloading screw moves downward relatively slowly by rotating, the unloading push plate also pushes the samples inside the sampling cylinder relatively slowly, resulting in a low sampling work efficiency. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a device for taking samples of highway test detection compaction degree to solve the problem that in the existing device for taking samples of highway test detection compaction degree, since the unloading screw moves downward relatively slowly by rotating, the unloading push plate also pushes the samples inside the sampling cylinder relatively slowly, resulting in a low sampling work efficiency as mentioned in the above background technique.

[0006] The technical solution of the utility model is as follows:

[0007] A device for taking samples of compaction degree in highway test detection, comprising: a bottom plate; a through hole is opened at the center of the bottom plate, a gantry is fixedly connected to the top of the bottom plate, a lifting frame is arranged inside the gantry, a transmission rod is arranged inside the lifting frame, sampling cylinders are arranged on both sides of the bottom of the transmission rod, a plurality of cutting teeth are fixedly connected to the bottoms of the sampling cylinders, and the two sampling cylinders cooperate with each other; a material discharging mechanism for controlling the closing and separating of the two sampling cylinders is arranged inside the transmission rod; a rotating mechanism for controlling the sampling of the sampling cylinders is arranged on the outer surface of the top end of the transmission rod; and a power mechanism for controlling the lifting of the sampling cylinders is arranged on the top of the gantry.

[0008] Preferably, the material discharging mechanism includes: a hexagonal lifting block is slidably connected inside the transmission rod, two first fixing blocks are fixedly connected to both sides of the hexagonal lifting block, the two first fixing blocks are fixedly connected through a first rotating shaft, a linkage rod is rotatably connected to the outer surface of the middle part of the two first rotating shafts, the other end of the linkage rod away from the first rotating shaft is rotatably connected to a second rotating shaft, second fixing blocks are fixedly connected to the outer surfaces of both ends of the second rotating shaft, the second fixing blocks are respectively fixedly connected to the sampling cylinders, a first screw rod is threadedly connected inside the hexagonal lifting block, the bottom end of the first screw rod is rotatably connected to the transmission rod, the top end of the first screw rod penetrates through the transmission rod and the lifting frame and extends to the first motor, the first motor is fixedly connected to the lifting frame, and the first screw rod is fixedly connected to the output end of the first motor; two rotating sleeves are fixedly connected to the bottom of the transmission rod, a third rotating shaft is rotatably connected inside each rotating sleeve, third fixing blocks are fixedly connected to the outer surfaces of both ends of the third rotating shaft, and the third fixing blocks are respectively fixedly connected to the sampling cylinders.

[0009] Preferably, stroke grooves are opened at the positions of the transmission rod close to the first fixing block and the hexagonal lifting block, and the stroke grooves are adapted to the first fixing block and the hexagonal lifting block.

[0010] Preferably, the rotating mechanism includes: a fixed sleeve is rotatably connected to the outer surface of the top end of the transmission rod, the fixed sleeve is fixedly connected to the lifting frame, a first synchronous pulley is arranged at the bottom of the fixed sleeve and fixed to the outer surface of the transmission rod, the first synchronous pulley is connected to a second synchronous pulley through a synchronous belt, and the diameter of the first synchronous pulley is smaller than that of the second synchronous pulley; a fourth rotating shaft is fixedly connected to the center of the second synchronous pulley, the other end of the fourth rotating shaft away from the second synchronous pulley penetrates through the lifting frame and extends to the second motor, the second motor is fixedly connected to the lifting frame, and the fourth rotating shaft is fixedly connected to the output end of the second motor.

[0011] Preferably, the power mechanism includes: a double-shaft motor is fixedly connected to the top of the gantry. First bevel gears are fixedly connected to both output ends of the double-shaft motor. Second bevel gears are meshed with one side of each of the two first bevel gears away from the double-shaft motor. Second lead screws are fixedly connected to the centers of the second bevel gears. The bottom ends of the second lead screws all penetrate through the gantry and extend to the bottom plate. The second lead screws are rotationally connected to the gantry and the bottom plate. Lifting blocks are threadedly connected to the outer surfaces of the second lead screws. Both of the lifting blocks are fixedly connected to the lifting frame.

[0012] Preferably, universal wheels with braking functions are arranged at the four corners of the bottom of the bottom plate. The universal wheels are all fixedly connected to the bottom plate.

[0013] Preferably, two structural plates are arranged on both sides of the gantry. The structural plates are fixedly connected to the gantry and the bottom plate.

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

[0015] First, through the combined action of the bottom plate, through holes, gantry, lifting frame, transmission rod, sampling cylinder, cutting teeth and the unloading mechanism, when the user takes a sample, the user can control the separation of the two sampling cylinders. While the two sampling cylinders are separated, the friction between the sample and the inner wall of the sampling cylinder is reduced, so that the sample can automatically fall off while the two sampling cylinders are separated to achieve the purpose of unloading, improving the working efficiency of sampling, and solving the problem that in the existing road test and inspection compaction degree sampling device, since the unloading screw moves downward relatively slowly by rotating, the unloading push plate also pushes the sample inside the sampling cylinder relatively slowly, resulting in a low working efficiency of sampling.

[0016] Second, through the combined action of the bottom plate, through holes, gantry, lifting frame, transmission rod, sampling cylinder, cutting teeth, rotating mechanism and power mechanism, the two closed sampling cylinders can be controlled to rotate at a high speed while moving vertically downward, so that the two sampling cylinders can quickly take samples of the road through the cutting teeth, which is convenient for the user to take samples of the road and improves the practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of a road test and inspection compaction degree sampling device of the present utility model;

[0018] Figure 2 is a side view sectional structural schematic diagram of a road test and inspection compaction degree sampling device of the present utility model;

[0019] Figure 3 is for the present utility model Figure 2 magnified structural schematic diagram at A in;

[0020] Figure 4 Structural schematic diagram of the material discharging mechanism of the present utility model;

[0021] Figure 5 Structural schematic diagram of the rotating mechanism of the present utility model;

[0022] Figure 6 Structural schematic diagram of the power mechanism of the present utility model.

[0023] In the figure:

[0024] 1. Base plate; 2. Through hole; 3. Gantry; 4. Lifting frame; 5. Transmission rod; 6. Sampling cylinder; 7. Cutting teeth; 8. Material discharging mechanism; 9. Rotating mechanism; 10. Power mechanism; 11. Hexagonal lifting block; 12. First fixing block; 13. First rotating shaft; 14. Linking rod; 15. Second rotating shaft; 16. Second fixing block; 17. First screw rod; 18. First motor; 19. Rotating sleeve; 20. Third rotating shaft; 21. Third fixing block; 22. Travel groove; 23. Fixed sleeve; 24. First synchronous pulley; 25. Synchronous belt; 26. Second synchronous pulley; 27. Fourth rotating shaft; 28. Second motor; 29. Biaxial motor; 30. First bevel gear; 31. Second bevel gear; 32. Second screw rod; 33. Lifting block; 34. Universal wheel; 35. Structural plate. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1 to 6 , the above technical solutions of the present utility model will be described in detail through the following embodiments:

[0027] A device for taking samples of compaction degree in highway test detection, comprising: a bottom plate 1; a through hole 2 is opened at the center of the bottom plate 1, a gantry 3 is fixedly connected to the top of the bottom plate 1, a lifting frame 4 is arranged inside the gantry 3, a transmission rod 5 is arranged inside the lifting frame 4, sampling cylinders 6 are arranged on both sides of the bottom of the transmission rod 5, a plurality of cutting teeth 7 are fixedly connected to the bottoms of the sampling cylinders 6, and the two sampling cylinders 6 cooperate with each other; a material discharging mechanism 8 for controlling the closing and separation of the two sampling cylinders 6 is arranged inside the transmission rod 5; a rotating mechanism 9 for controlling the sampling of the sampling cylinders 6 is arranged on the outer surface of the top end of the transmission rod 5; a power mechanism 10 for controlling the lifting of the sampling cylinders 6 is arranged on the top of the gantry 3. The user can control the transmission rod 5 to rotate at a high speed through the rotating mechanism 9. While the transmission rod 5 rotates at a high speed, it drives the sampling cylinders 6 to rotate. At the same time, the power mechanism 10 is used to control the downward movement of the sampling cylinders 6 rotating at a high speed, so as to take samples of the highway.

[0028] Such as Figure 2 , Figure 3 and Figure 4As shown in the figure, the material discharging mechanism 8 includes: a hexagonal lifting block 11 is slidably connected inside a transmission rod 5. Two first fixing blocks 12 are fixedly connected to both sides of the hexagonal lifting block 11. The two first fixing blocks 12 are fixedly connected through a first rotating shaft 13. The middle outer surfaces of the two first rotating shafts 13 are rotatably connected with a linkage rod 14. The ends of the linkage rod 14 far from the first rotating shaft 13 are rotatably connected with a second rotating shaft 15. Second fixing blocks 16 are fixedly connected to the outer surfaces of both ends of the second rotating shaft 15. The second fixing blocks 16 are respectively fixedly connected with the sampling cylinders 6. A first screw rod 17 is threadedly connected inside the hexagonal lifting block 11. The bottom end of the first screw rod 17 is rotatably connected with the transmission rod 5. The top end of the first screw rod 17 penetrates through the transmission rod 5 and the lifting frame 4 and extends to the first motor 18. The first motor 18 is fixedly connected with the lifting frame 4. The first screw rod 17 is fixedly connected with the output end of the first motor 18. Two rotating sleeves 19 are fixedly connected to the bottom of the transmission rod 5. A third rotating shaft 20 is rotatably connected inside each of the rotating sleeves 19. Third fixing blocks 21 are fixedly connected to the outer surfaces of both ends of the third rotating shaft 20. The third fixing blocks 21 are respectively fixedly connected with the sampling cylinders 6. The user can start the first motor 18. The output end of the first motor 18 drives the first screw rod 17 to rotate. The rotation of the first screw rod 17 drives the hexagonal lifting block 11. The hexagonal lifting block 11 moves upward through the cooperation of the transmission rod 5. While the hexagonal lifting block 11 moves upward, it drives the first fixing block 12. The first fixing block 12 drives the first rotating shaft 13. The first rotating shaft 13 pulls the linkage rod 14, so that the other end of the linkage rod 14 pulls one side of the sampling cylinder 6 through the second rotating shaft 15, so that the sampling cylinder 6 rotates around the third rotating shaft 20, and thus the two sampling cylinders 6 are separated. When sampling, the user can control the separation of the two sampling cylinders 6. While the two sampling cylinders 6 are separated, the friction between the sample and the inner wall of the sampling cylinder 6 is reduced, so that the sample can automatically fall off while the two sampling cylinders 6 are separated, achieving the purpose of discharging materials, improving the working efficiency of sampling, and solving the problem that in the existing compaction degree material sampling device for highway test detection, since the discharging screw rod moves downward relatively slowly by rotating, the discharging push plate also pushes the sample inside the sampling cylinder 6 relatively slowly, resulting in a relatively low working efficiency of sampling.

[0029] As Figure 5 shown, a travel groove 22 is opened at the position of the transmission rod 5 close to the first fixing block 12 and the hexagonal lifting block 11. The travel groove 22 is adapted to the first fixing block 12 and the hexagonal lifting block 11, and can limit the moving stroke of the hexagonal lifting block 11 and the first fixing block 12.

[0030] As Figure 5As shown in the figure, the rotating mechanism 9 includes: a fixed sleeve 23 is rotatably connected to the outer surface of the top end of the transmission rod 5. The fixed sleeve 23 is fixedly connected to the lifting frame 4. A first synchronous pulley 24 is arranged at the bottom of the fixed sleeve 23. The first synchronous pulley 24 is fixed to the outer surface of the transmission rod 5. The first synchronous pulley 24 is connected to a second synchronous pulley 26 through a synchronous belt 25. The diameter of the first synchronous pulley 24 is smaller than that of the second synchronous pulley 26. The center of the second synchronous pulley 26 is fixedly connected to a fourth rotating shaft 27. One end of the fourth rotating shaft 27 away from the second synchronous pulley 26 penetrates through the lifting frame 4 and extends to the second motor 28. The second motor 28 is fixedly connected to the lifting frame 4. The fourth rotating shaft 27 is fixedly connected to the output end of the second motor 28. When the second motor 28 is started, the output end of the second motor 28 drives the fourth rotating shaft 27 to rotate. The fourth rotating shaft 27 drives the second synchronous pulley 26. The second synchronous pulley 26 drives the first synchronous pulley 24 to rotate at a high speed through the synchronous belt 25. The first synchronous pulley 24 drives the transmission rod 5. The transmission rod 5 drives the third rotating shaft 20 through the rotating sleeve 19. The third rotating shaft 20 drives the sampling cylinder 6 through the third fixing blocks 21 respectively, so that the sampling cylinder 6 rotates at a high speed.

[0031] As Figure 6 shown, the power mechanism 10 includes: a double-shaft motor 29 is fixedly connected to the top of the gantry 3. The output ends on both sides of the double-shaft motor 29 are fixedly connected with first bevel gears 30. A second bevel gear 31 is meshed with one side of each of the two first bevel gears 30 away from the double-shaft motor 29. The centers of the second bevel gears 31 are fixedly connected with second screw rods 32. The bottom ends of the second screw rods 32 penetrate through the gantry 3 and extend to the bottom plate 1. The second screw rods 32 are rotatably connected to the gantry 3 and the bottom plate 1. The outer surfaces of the second screw rods 32 are threadedly connected with lifting blocks 33. Both of the two lifting blocks 33 are fixedly connected to the lifting frame 4. When the double-shaft motor 29 is started, the output end of the double-shaft motor 29 drives the first bevel gears 30. The first bevel gears 30 drive the second bevel gears 31 respectively. The second bevel gears 31 drive the second screw rods 32 to rotate. While the second screw rods 32 are rotating, they drive the lifting blocks 33, so that the lifting blocks 33 drive the lifting frame 4 to move downward, thereby controlling the sampling cylinder 6 to move vertically downward.

[0032] As Figure 1 shown, universal wheels 34 with braking functions are arranged at the four corners of the bottom of the bottom plate 1. The universal wheels 34 are fixedly connected to the bottom plate 1, which facilitates the user to move and fix the whole device.

[0033] As Figure 1 and Figure 2 shown, two structural plates 35 are arranged on both sides of the gantry 3. The structural plates 35 are fixedly connected to the gantry 3 and the bottom plate 1, which improves the structural strength of the connection between the gantry and the bottom plate, and thus improves the service life of the device.

[0034] Working principle: The user can start the first motor 18. The output end of the first motor 18 drives the first screw rod 17 to rotate. The rotation of the first screw rod 17 drives the hexagonal lifting block 11. The hexagonal lifting block 11 moves upward through the cooperation of the transmission rod 5. While the hexagonal lifting block 11 moves upward, it drives the first fixing block 12. The first fixing block 12 drives the first rotating shaft 13. The first rotating shaft 13 pulls the linkage rod 14, so that the other end of the linkage rod 14 pulls one side of the sampling cylinder 6 through the second rotating shaft 15, causing the sampling cylinder 6 to rotate around the third rotating shaft 20, and thus separating the two sampling cylinders 6. When sampling, the user can control the separation of the two sampling cylinders 6. When the two sampling cylinders 6 are separated, the friction between the sample and the inner wall of the sampling cylinder 6 decreases, and the sample can automatically fall off while the two sampling cylinders 6 are separated, achieving the purpose of discharging materials, improving the working efficiency of sampling, and solving the problem that the existing device for taking samples of compaction degree in highway test detection has a low working efficiency of sampling because the discharging screw rod moves downward relatively slowly by rotating, resulting in the discharging push plate pushing the sample inside the sampling cylinder 6 relatively slowly.

[0035] Start the second motor 28. The output end of the second motor 28 drives the fourth rotating shaft 27 to rotate. The fourth rotating shaft 27 drives the second synchronous pulley 26. The second synchronous pulley 26 drives the first synchronous pulley 24 to rotate at a high speed through the synchronous belt 25. The first synchronous pulley 24 drives the transmission rod 5. The transmission rod 5 drives the third rotating shaft 20 through the rotating sleeve 19. The third rotating shaft 20 drives the sampling cylinder 6 through the third fixing block 21 respectively, causing the sampling cylinder 6 to rotate at a high speed. Then start the double-shaft motor 29. The output end of the double-shaft motor 29 drives the first bevel gear 30. The first bevel gear 30 drives the second bevel gear 31 respectively. The second bevel gear 31 drives the second screw rod 32 to rotate. While the second screw rod 32 rotates, it drives the lifting block 33, causing the lifting block 33 to drive the lifting frame 4 to move downward, and then controlling the sampling cylinder 6 to move vertically downward, so that the sampling cylinder 6 samples the highway through the cutting teeth 7. It can control the two closed sampling cylinders 6 to rotate at a high speed and move vertically downward at the same time, so that the two sampling cylinders 6 can quickly sample the highway through the cutting teeth 7, which is convenient for the user to sample the highway and improves the practicability.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for taking samples of compaction degree in highway test detection, comprising: a bottom plate (1); Characterized in that a through hole (2) is opened at the center of the bottom plate (1), a gantry (3) is fixedly connected to the top of the bottom plate (1), a lifting frame (4) is arranged inside the gantry (3), a transmission rod (5) is arranged inside the lifting frame (4), sampling cylinders (6) are arranged on both sides of the bottom of the transmission rod (5), a plurality of cutting teeth (7) are fixedly connected to the bottoms of the sampling cylinders (6), and the two sampling cylinders (6) cooperate with each other; a material discharging mechanism (8) for controlling the closing and separation of the two sampling cylinders (6) is arranged inside the transmission rod (5); a rotating mechanism (9) for controlling the sampling of the sampling cylinder (6) is arranged on the outer surface of the top end of the transmission rod (5); a power mechanism (10) for controlling the lifting of the sampling cylinder (6) is arranged on the top of the gantry (3).

2. The material sampling device for highway test and detection of compaction degree according to claim 1, wherein: The material discharging mechanism (8) includes: a hexagonal lifting block (11) is slidably connected inside the transmission rod (5), two first fixing blocks (12) are fixedly connected to both sides of the hexagonal lifting block (11), the two first fixing blocks (12) are fixedly connected through a first rotating shaft (13), linkage rods (14) are rotatably connected to the outer surfaces of the middles of the two first rotating shafts (13), second rotating shafts (15) are rotatably connected to the ends of the linkage rods (14) far away from the first rotating shafts (13), second fixing blocks (16) are fixedly connected to the outer surfaces of both ends of the second rotating shafts (15), the second fixing blocks (16) are respectively fixedly connected to the sampling cylinders (6), a first screw rod (17) is threadedly connected inside the hexagonal lifting block (11), the bottom end of the first screw rod (17) is rotatably connected to the transmission rod (5), the top end of the first screw rod (17) penetrates through the transmission rod (5) and the lifting frame (4) and extends to a first motor (18), and the first motor (18) is fixedly connected to the lifting frame (4), and the first screw rod (17) is fixedly connected to the output end of the first motor (18); two rotating sleeves (19) are fixedly connected to the bottom of the transmission rod (5), third rotating shafts (20) are rotatably connected inside the rotating sleeves (19), third fixing blocks (21) are fixedly connected to the outer surfaces of both ends of the third rotating shafts (20), and the third fixing blocks (21) are respectively fixedly connected to the sampling cylinders (6).

3. The material sampling device for highway test and inspection of compaction degree according to claim 2, characterized in that: Stroke grooves (22) are opened at the positions of the transmission rod (5) close to the first fixing blocks (12) and the hexagonal lifting block (11), and the stroke grooves (22) are adapted to the first fixing blocks (12) and the hexagonal lifting block (11).

4. The material sampling device for compaction degree detection in highway tests according to claim 1, characterized in that: The rotating mechanism (9) includes: A fixed sleeve (23) is rotatably connected to the outer surface of the top end of the transmission rod (5). The fixed sleeve (23) is fixedly connected to the lifting frame (4). A first synchronous pulley (24) is arranged at the bottom of the fixed sleeve (23). The first synchronous pulley (24) is fixed to the outer surface of the transmission rod (5). The first synchronous pulley (24) is connected to a second synchronous pulley (26) through a synchronous belt (25). The diameter of the first synchronous pulley (24) is smaller than that of the second synchronous pulley (26). The center of the second synchronous pulley (26) is fixedly connected to a fourth rotating shaft (27). One end of the fourth rotating shaft (27) away from the second synchronous pulley (26) penetrates through the lifting frame (4) and extends to the second motor (28). The second motor (28) is fixedly connected to the lifting frame (4). The fourth rotating shaft (27) is fixedly connected to the output end of the second motor (28).

5. The material sampling device for highway test and detection of compaction degree according to claim 1, wherein: The power mechanism (10) includes: A double-shaft motor (29) is fixedly connected to the top of the gantry (3). First bevel gears (30) are fixedly connected to both output ends of the double-shaft motor (29). Second bevel gears (31) are meshed with one side of each of the two first bevel gears (30) away from the double-shaft motor (29). Second screw rods (32) are fixedly connected to the centers of the second bevel gears (31). The bottom ends of the second screw rods (32) penetrate through the gantry (3) and extend to the bottom plate (1). The second screw rods (32) are rotatably connected to the gantry (3) and the bottom plate (1). Lifting blocks (33) are threadedly connected to the outer surfaces of the second screw rods (32). Both of the two lifting blocks (33) are fixedly connected to the lifting frame (4).

6. The material sampling device for highway test and detection of compaction degree according to claim 1, wherein: Universal wheels (34) with braking functions are arranged at the four corners of the bottom of the bottom plate (1). The universal wheels (34) are fixedly connected to the bottom plate (1).

7. The material sampling device for highway test and detection of compaction degree according to claim 1, wherein: Two structural plates (35) are arranged on both sides of the gantry (3). The structural plates (35) are fixedly connected to the gantry (3) and the bottom plate (1).

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