A sampling machine for cement pavement detection

Abstract

The application discloses a sampling machine for cement pavement detection, which comprises a base, the base is arranged in a "Fang" character structure, a support is fixedly installed at the upper front position of the base, two guide columns are fixedly and symmetrically installed at the upper rear corner positions of the support, a top beam is fixedly installed at the top of the two guide columns, a sliding beam is slidably arranged below the top beam between the two guide columns, a connecting seat is fixedly installed at the front center position of the sliding beam, a motor is fixedly installed at the upper portion of the connecting seat, a coring barrel is threadedly connected with the output shaft of the motor, a reinforcing rod is fixedly connected between the top beam and the base, a roller structure is arranged at the upper rear center position of the base, and a screw rod penetrates through the center positions between the top beam, the sliding beam and the support. The sampling machine for cement pavement detection has multiple functions of excellent protection effect, high stability and convenient movement.

Description

Technical Field

[0001] The present invention relates to the field of road detection, and particularly relates to a sampling machine for cement pavement detection. Background Art

[0002] After the completion of the construction of a cement road, relevant quality inspection departments need to detect the road quality. The detection method is usually to open through holes in the cement pavement and take out the cement road cores in the through holes. Therefore, the cement pavement detection sampling machine usually becomes a core drill;

[0003] However, since the main work of the sampling machine is to drill holes in the cement pavement, in order to ensure smooth drilling, water injection is usually required. During the water injection process, mud will be generated, and the mud will be thrown out with the high-speed rotating core barrel, which will lead to the problem that the mud splashes onto the clothes of personnel. The traditional sampling machine cannot block the mud. And due to the large thickness of the road, the length of the core barrel is usually relatively long. The core barrel is only fixed to the output shaft of the power device by its top end. Therefore, during the rotation process, its stability is very poor. The high-hardness cement pavement will cause damage to the core barrel or deformation of the motor output shaft, which is not conducive to use. Summary of the Invention

[0004] The main purpose of the present invention is to provide a sampling machine for cement pavement detection, which can effectively solve the technical problems in the background art.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A sampling machine for cement pavement detection includes a base. The base is arranged in a "C" - shaped structure, and a support is fixedly installed at the front position of the upper part of the base. Two guide columns are symmetrically and fixedly installed at the rear corner positions of the upper part of the support. A top beam is fixedly installed at the top between the two guide columns. A sliding beam is slidably arranged at the position below the top beam between the two guide columns. A connecting seat is fixedly installed at the central position of the front part of the sliding beam. A motor is fixedly installed on the upper part of the connecting seat, and the output shaft of the motor is threadedly connected with a core barrel. A reinforcing rod is fixedly connected between the top beam and the base. A roller structure is arranged at the central position of the rear part of the upper part of the base. A screw rod penetrates through the central positions among the top beam, the sliding beam and the support, and the screw rod is rotationally connected with the top beam and the support, and the screw rod is threadedly connected with the sliding beam. A protective cover is fixedly installed at the central position of the upper part of the support. Installation blocks are installed at the rear positions on both sides of the protective cover, and the installation blocks are connected to the support by two hexagonal bolts.

[0007] As a further embodiment of the present invention, the roller structure includes a support frame, which is fixedly installed on the upper rear center position of the base. A wheel frame is rotatably connected to the inner side of the support frame via a coupling. A caster is rotatably installed at one end of the wheel frame, and a locking bolt is threadedly connected to the center position of the wheel frame. A locking screw hole is provided at the center position of the rear surface of the base, and the locking bolt is compatible with the locking screw hole.

[0008] As a further embodiment of the present invention, the upper part of the support is provided with a movable structure, the movable structure including two slides, the two slides being symmetrically installed on the upper part of the support in front of the guide column, each of the two slides having a groove on its opposite surface, each of the two grooves having a slider slidably connected inside, the two sliders being rotatably connected to a rotating shaft, a connecting rod being fixedly connected to the outside of the rotating shaft, a baffle being fixedly connected to one end of the connecting rod, four guide rods being fixedly installed on one side of the baffle, and a stabilizing head being fixedly connected to one end of each of the four guide rods.

[0009] As a further embodiment of the present invention, a stabilizing bolt passes through the center of the connecting rod, and a stabilizing screw hole is provided on one side surface of the support, wherein the stabilizing bolt is threadedly matched with the stabilizing screw hole.

[0010] As a further embodiment of the present invention, the stabilizing head has a "V" shaped structure, and both ends of the stabilizing head are rotatably connected to rollers.

[0011] As a further embodiment of the present invention, a locking structure is provided between the rotating roller and the stabilizing head. The locking structure consists of a screw seat and a fixing bolt. The screw seat is fixedly installed on the upper part of the stabilizing head, and the fixing bolt is threadedly connected to the center position of the screw seat. The top end of the rotating roller is fixedly connected to a fixing shaft through the stabilizing head. A fixing screw hole is opened on the outer surface of the fixing shaft, and the fixing screw hole matches the thread of the fixing bolt.

[0012] As a further embodiment of the present invention, a stabilizing structure is provided at the upper rear position of the protective cover. The stabilizing structure includes a screw rod that passes through the upper rear position of the protective cover. One end of the screw rod is fixedly connected to a fixing sleeve, and one end of the fixing sleeve is slidably connected to a movable rod. A notch is formed on the surface of one end of the movable rod.

[0013] As a further embodiment of the present invention, the stabilizing structure is symmetrically arranged in two sets, and a rotating handle is threadedly connected between the two screws. The screws and the movable rod are both L-shaped.

[0014] As a further embodiment of the present invention, a rectangular rod is fixedly installed at the inner center of the fixed sleeve, and a rectangular groove is formed at the inner center of the movable rod, with the rectangular rod and the rectangular groove being adaptively matched.

[0015] As a further embodiment of the present invention, the notch is adapted to match the baffle, and a guide groove is provided on the outer surface of the protective cover, the guide groove being adapted to match the guide rod.

[0016] The beneficial effects of this invention are as follows:

[0017] By setting up a protective cover, the inner wall of the protective cover is encircled by the outside of the core sampling tube. When the core sampling tube rotates at high speed, it can effectively prevent the mud generated by water and cement ash from splashing onto the personnel's clothing, thus achieving an effective protective effect.

[0018] By setting up a movable structure in conjunction with a roller structure, when the connecting rod, guide rod, and wheel frame are perpendicular to the ground, the four rotating rollers and casters can be stably set on the ground by connecting the locking bolts and stabilizing bolts to the locking screw holes and stabilizing screw holes, respectively. This allows for easy movement of the entire sampling machine and improves the convenience of moving the sampling machine. When the four rotating rollers and casters are off the ground, the base directly contacts the ground, which ensures the stability of the sampling machine during operation.

[0019] By setting up a stabilizing structure in conjunction with a moving structure and a protective cover, the connecting rod can drive the stabilizing head to rotate to a horizontal position. When the two are in a horizontal position, the movable rod can be engaged with the outside of the baffle through the notch. Then, by rotating the handle, the screw is moved, which in turn drives the two stabilizing heads to move simultaneously. This allows the four rollers to hold the core-collecting cylinder, providing stronger support for the core-collecting cylinder. This avoids the problem of deformation of the core-collecting cylinder itself or the deformation of the motor output shaft due to its large length and few support points. It also avoids the phenomenon of eccentricity of the core-collecting cylinder, increases the service life of the core-collecting cylinder and the motor, and does not affect the normal operation of the core-collecting cylinder.

[0020] By setting up a protective cover and a stabilizing structure, the outer side of the protective cover has four sets of guide grooves. The guide grooves can be used to support the guide rod, which makes the guide rod more stable when clamping the core tube in a horizontal state. This avoids the deformation of the guide rod caused by the rotation of the core tube and the weight of the stabilizing head, thus increasing the stability of use.

[0021] By setting the stabilizing head in a "V" shape, the V-shaped stabilizing head can symmetrically set two rotating rollers and can also be applied to core barrels of different diameters, thus improving the applicability.

[0022] By setting a screw seat and fixing bolts in conjunction with a stabilizing structure, the fixing bolts can be connected to the fixing screw holes on the outer surface of the fixing shaft through the screw seat, thereby fixing the position of the rotating roller. When the stabilizing structure is used to clamp the rotating roller outside the core-collecting cylinder, since the position of the rotating roller is fixed, the motor can be started to rotate in the opposite direction, thereby causing the output shaft of the motor to separate from the core-collecting cylinder thread, thus facilitating the replacement of the core-collecting cylinder. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a sampling machine for cement pavement testing according to the present invention;

[0024] Figure 2 This is a rear view of a sampling machine for testing cement pavement according to the present invention.

[0025] Figure 3 This invention relates to a sampling machine for testing cement pavement. Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 This is a bottom view of a sampling machine for testing cement pavement according to the present invention.

[0027] Figure 5 This is a partial structural enlarged view of a sampling machine for cement pavement testing according to the present invention;

[0028] Figure 6 This invention relates to a sampling machine for testing cement pavement. Figure 5 Bottom view;

[0029] Figure 7 This invention relates to a sampling machine for testing cement pavement. Figure 5 Disassembled diagram of the protective cover and screw;

[0030] Figure 8 This invention relates to a sampling machine for testing cement pavement. Figure 7 Cross-sectional view of the middle slide block;

[0031] Figure 9 This is a cross-sectional view of the screw of a sampling machine for cement pavement testing according to the present invention;

[0032] Figure 10 This is an enlarged view of the stabilizing head of a sampling machine for cement pavement testing according to the present invention;

[0033] Figure 11 This is a demonstration diagram of the rotating roller flipping of a sampling machine for cement pavement testing according to the present invention.

[0034] Figure 12 This invention relates to a sampling machine for testing cement pavement. Figure 11 Bottom view;

[0035] Figure 13 This invention relates to a sampling machine for testing cement pavement. Figure 11 Rear view.

[0036] In the figure: 1. Base; 2. Support; 3. Guide post; 4. Top beam; 5. Slide beam; 6. Motor; 7. Connecting seat; 8. Core barrel; 9. Reinforcement rod; 10. Roller structure; 11. Screw rod; 12. Protective cover; 13. Mounting block; 14. Moving structure; 15. Stabilizing structure; 16. Support frame; 17. Wheel frame; 18. Coupling shaft; 19. Caster wheel; 20. Locking bolt; 21. Locking screw hole; 22. Slide seat; 23. Slide groove; 24. Slide block; 25. Rotating shaft; 26. Link rod; 27. Baffle; 28. Guide rod; 29. Stabilizing head; 30. Stabilizing bolt; 31. Guide groove; 32. Screw; 33. Fixed sleeve; 34. Movable rod; 35. Notch; 36. Turning handle; 37. Stabilizing screw hole; 38. Roller; 39. Fixed shaft; 40. Screw seat; 41. Fixed bolt. Detailed implementation mode

[0037] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with the specific implementation modes.

[0038] As Figures 1-13 shown, a sampling machine for cement pavement detection includes a base 1. The base 1 is arranged in a "C" - shaped structure, and a support 2 is fixedly installed at the front position of the upper part of the base 1. Two guide posts 3 are symmetrically and fixedly installed at the rear corner positions of the upper part of the support 2. A top beam 4 is fixedly installed at the top between the two guide posts 3. A slide beam 5 is slidably arranged at the position below the top beam 4 between the two guide posts 3. A connecting seat 7 is fixedly installed at the central position of the front part of the slide beam 5. A motor 6 is fixedly installed on the upper part of the connecting seat 7. The output shaft of the motor 6 is thread - connected with a core barrel 8. A reinforcement rod 9 is fixedly connected between the top beam 4 and the base 1. A roller structure 10 is arranged at the central position of the rear part of the upper part of the base 1. A screw rod 11 passes through the central positions among the top beam 4, the slide beam 5 and the support 2, and the screw rod 11 is rotatably connected with the top beam 4 and the support 2. The screw rod 11 is thread - connected with the slide beam 5. A protective cover 12 is fixedly installed at the central position of the upper part of the support 2. Mounting blocks 13 are installed at the rear positions on both sides of the protective cover 12. The mounting blocks 13 are connected with the support 2 by two hexagon bolts.

[0039] In this embodiment, the roller structure 10 includes a support frame 16. The support frame 16 is fixedly installed at the central position of the rear part of the upper part of the base 1. The inner side of the support frame 16 is rotatably connected with a wheel frame 17 through a coupling shaft 18. A caster wheel 19 is rotatably installed at one end of the wheel frame 17. A locking bolt 20 is thread - connected at the central position of the wheel frame 17. A locking screw hole 21 is opened at the central position of the rear surface of the base 1. The locking bolt 20 is adaptively matched with the locking screw hole 21.

[0040] The wheel frame 17 can be flipped through the support frame 16, so that the caster wheel 19 can be adjusted to contact the ground or be away from the ground, making the base 1 contact the ground or be away from the ground.

[0041] In this embodiment, the upper part of the support 2 is provided with a movable structure 14, which includes two slides 22. The two slides 22 are symmetrically installed on the upper part of the support 2 in front of the guide post 3. The opposite surfaces of the two slides 22 are provided with slide grooves 23. The interior of the two slide grooves 23 is slidably connected with sliders 24. The two sliders 24 are rotatably connected with a rotating shaft 25. The outside of the rotating shaft 25 is fixedly connected with a connecting rod 26. One end of the connecting rod 26 is fixedly connected with a baffle 27. Four guide rods 28 are fixedly installed on one side of the baffle 27. One end of the four guide rods 28 is fixedly connected with a stabilizing head 29.

[0042] The stabilizing head 29 can be flipped via the pivot 25, allowing the stabilizing head 29 to clamp the core tube 8. At the same time, the stabilizing head 29 can also be flipped to protrude from the bottom of the base 1, allowing the base 1 to be lifted.

[0043] In this embodiment, a stabilizing bolt 30 passes through the center of the connecting rod 26, and a stabilizing screw hole 37 is provided on one side surface of the support 2. The stabilizing bolt 30 and the stabilizing screw hole 37 are threadedly matched.

[0044] When the connecting rod 26 is flipped to a vertical position, the stabilizing bolt 30 can be connected to the stabilizing screw hole 37 to fix the position of the connecting rod 26.

[0045] In this embodiment, the stabilizing head 29 has a "V" shaped structure, and both ends of the stabilizing head 29 are rotatably connected to rollers 38.

[0046] The “V”-shaped stabilizing head 29 can be used to accommodate core barrels 8 of different diameters, while the rotating roller 38 can directly contact the core barrel 8 and rotate with it when the core barrel 8 rotates.

[0047] In this embodiment, a locking structure is provided between the rotating roller 38 and the stabilizing head 29. The locking structure consists of a screw seat 40 and a fixing bolt 41. The screw seat 40 is fixedly installed on the upper part of the stabilizing head 29, and the fixing bolt 41 is threadedly connected to the center position of the screw seat 40. The top end of the rotating roller 38 passes through the stabilizing head 29 and is fixedly connected to a fixing shaft 39. A fixing screw hole is opened on the outer surface of the fixing shaft 39, and the fixing screw hole is threadedly matched with the fixing bolt 41.

[0048] The locking structure can fix the position of the rotating roller 38, thereby preventing the rotating roller 38 from rotating and clamping the core-taking cylinder 8. Once the core-taking cylinder 8 is clamped, the motor 6 can be started to reverse, thereby separating the output shaft of the motor 6 from the core-taking cylinder 8.

[0049] In this embodiment, a stabilizing structure 15 is provided at the upper rear position of the protective cover 12. The stabilizing structure 15 includes a screw 32, which passes through the upper rear position of the protective cover 12. One end of the screw 32 is fixedly connected to a fixing sleeve 33, and one end of the fixing sleeve 33 is slidably connected to a movable rod 34. A notch 35 is provided on the surface of one end of the movable rod 34.

[0050] The movable rod 34 can slide inside the fixed sleeve 33, so the notch 35 can be fitted onto or detached from the baffle 27. When the screw 32 moves, the guide rod 28 and the stabilizing head 29 can be moved through the baffle 27.

[0051] In this embodiment, two sets of stabilizing structures 15 are symmetrically arranged, and a handle 36 is threaded between the two screws 32. The screws 32 and the movable rod 34 are both L-shaped.

[0052] When the handle 36 is rotated, the handle 36 can drive the two screws 32 to move simultaneously in opposite or relative directions, which in turn can drive the two stabilizing heads 29 to move simultaneously, ensuring that the center point of the gap between the two stabilizing heads 29 is perpendicular to the center point of the output shaft of the motor 6.

[0053] In this embodiment, a rectangular rod is fixedly installed at the center of the fixed sleeve 33, and a rectangular groove is provided at the center of the movable rod 34. The rectangular rod and the rectangular groove are adaptively matched.

[0054] The rectangular rod and rectangular groove can restrict the rotation of the movable rod 34 and prevent the movable rod 34 from moving in a circular motion within the fixed sleeve 33.

[0055] In this embodiment, the notch 35 is adapted to match the baffle 27, and the outer surface of the protective cover 12 is provided with a guide groove 31, which is adapted to match the guide rod 28.

[0056] The guide groove 31 can support the guide rod 28 and increase the support force on the guide rod 28.

[0057] It should be noted that the present invention is a sampling machine for testing cement pavement. In use, the base 1 is placed on the road surface, the movable rod 34 is moved horizontally so that the notch 35 is locked outside the baffle 27, and then the rotating handle 36 is rotated. The rotating handle 36 drives the screw 32 to move, the screw 32 drives the fixed sleeve 33 to move, and then drives the two stabilizing heads 29 to move through the baffle 27, so that the four rotating rollers 38 are clamped outside the core sampling cylinder 8, providing stronger support for the core sampling cylinder 8.

[0058] Then, the motor 6 is powered on. After being powered on, the output shaft of the motor 6 drives the core cylinder 8 to rotate at high speed. The operator rotates the lead screw 11 through the handwheel at the top of the lead screw 11. The lead screw 11 drives the slide beam 5 to move, so that the core cylinder 8 contacts the ground. During the process, people pour water into the contact point between the core cylinder 8 and the cement road surface through the water pipe. The high-speed rotating core cylinder 8 drills holes in the cement road surface. Since the core cylinder 8 is hollow inside, the material of the cement road surface will remain in the core cylinder 8 in a columnar shape inside the core cylinder 8.

[0059] During the sampling process, the water and cement ash will produce mud. The mud will be thrown onto the inner wall of the protective cover 12 as the core tube 8 rotates at high speed, thus preventing the cement slurry from splashing onto the personnel's clothes.

[0060] When the core sampler 8 drills through the cement road, it comes into contact with the soil. At this point, the motor 6 stops working, and the lead screw 11 is rotated in the opposite direction. The lead screw 11 drives the slide beam 5 to move vertically upward, thereby moving the core sampler 8 away from the cement road surface. At this time, two situations may occur. One is that the cement column sample taken out from inside the core sampler 8 falls into the through hole drilled in the cement road surface. People need to use clamp-like tools to take out the cement column sample and send it for testing. The other is that the cement column sample will be stuck inside the core sampler 8. People use roller-like tools to tap the outside of the core sampler 8. The vibration force will cause the cement column sample to fall off. The fallen cement column sample can then be sent for testing.

[0061] After sampling, move the movable rod 34 to make the notch 35 detach from the baffle 27. Then, flip the connecting rod 26 through the rotating shaft 25. After flipping, slide it through the slider 24 so that the guide rod 28 is perpendicular to the ground. Finally, connect the stabilizing bolt 30 to the stabilizing screw hole 37, so that the four rotating rollers 38 contact the ground. Then, flip the wheel frame 17 and connect it to the locking screw hole 21 through the locking bolt 20 so that the caster 19 contacts the ground. At this time, the entire cement road surface detection and sampling machine can be moved by the four rotating rollers 38 and the caster 19.

[0062] When sampling again, the wheel frame 17 and connecting rod 26 are flipped back to the horizontal position so that the base 1 contacts the ground, which can ensure the stability of the entire sampling machine during sampling.

[0063] When it is necessary to replace the core tube 8, rotate the fixing bolt 41 to connect with the fixing screw hole on the outside of the fixing shaft 39, thereby restricting the rotation of the rotating roller 38. Then rotate the handle 36 again to clamp the four rotating rollers 38 on the outside of the core tube 8. Start the motor 6 to reverse, so that the output shaft of the motor 6 is separated from the thread of the core tube 8. Then replace the core tube 8 with a new one.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A sampling machine for testing cement pavement, characterized in that: It includes a base (1), the base (1) is arranged in a "C" - shaped structure, and a support (2) is fixedly installed at the front position of the upper part of the base (1). Two guide columns (3) are symmetrically and fixedly installed at the rear - corner positions of the upper part of the support (2). A top beam (4) is fixedly installed at the top between the two guide columns (3). A sliding beam (5) is slidably arranged below the top beam (4) between the two guide columns (3). A connecting seat (7) is fixedly installed at the central position of the front part of the sliding beam (5). A motor (6) is fixedly installed on the upper part of the connecting seat (7), and the output shaft of the motor (6) is threadedly connected to a core - taking cylinder (8). A reinforcing rod (9) is fixedly connected between the top beam (4) and the base (1). A roller structure (10) is arranged at the central position of the rear part of the upper part of the base (1). A screw rod (11) passes through the central positions among the top beam (4), the sliding beam (5) and the support (2), and the screw rod (11) is rotatably connected to the top beam (4) and the support (2), and the screw rod (11) is threadedly connected to the sliding beam (5). A protective cover (12) is fixedly installed at the central position of the upper part of the support (2). Mounting blocks (13) are installed at the rear positions on both sides of the protective cover (12), and the mounting blocks (13) are connected to the support (2) by two hex bolts; A moving structure (14) is arranged on the upper part of the support (2). The moving structure (14) includes two sliding seats (22). The two sliding seats (22) are symmetrically installed in front of the guide columns (3) on the upper part of the support (2). Chute grooves (23) are opened on the opposite surfaces of the two sliding seats (22). Sliding blocks (24) are slidably connected inside the two chute grooves (23). A rotating shaft (25) is rotatably connected between the two sliding blocks (24). A connecting rod (26) is fixedly connected to the outside of the rotating shaft (25). One end of the connecting rod (26) is fixedly connected to a baffle (27). Four guide rods (28) are fixedly installed on one side of the baffle (27). The four guide rods (28) are fixedly connected to a stabilizing head (29) at one end; The stabilizing head (29) is arranged in a "V" - shaped structure, and rotating rollers (38) are rotatably connected to both ends of the stabilizing head (29); A stabilizing structure (15) is arranged at the rear position of the upper part of the protective cover (12). The stabilizing structure (15) includes a screw rod (32). The screw rod (32) penetrates through the rear position of the upper part of the protective cover (12). A fixed sleeve (33) is fixedly connected to one end of the screw rod (32). A movable rod (34) is slidably connected to one end of the fixed sleeve (33). A notch (35) is opened on the surface of one end of the movable rod (34); The stabilizing structure (15) is symmetrically arranged in two groups. A turning handle (36) is threadedly connected between the two screw rods (32). The shapes of the screw rod (32) and the movable rod (34) are both in an "L" - shape.

2. The sampling machine for cement pavement testing according to claim 1, characterized in that: The roller structure (10) includes a support frame (16), which is fixedly installed on the upper rear center of the base (1). The inner side of the support frame (16) is rotatably connected to a wheel frame (17) via a connecting shaft (18). A caster (19) is rotatably installed at one end of the wheel frame (17), and a locking bolt (20) is threadedly connected to the center of the wheel frame (17). A locking screw hole (21) is provided at the center of the rear surface of the base (1), and the locking bolt (20) is compatible with the locking screw hole (21).

3. A sampling machine for testing cement pavement according to claim 2, characterized in that: A stabilizing bolt (30) passes through the center of the connecting rod (26), and a stabilizing screw hole (37) is provided on one side surface of the support (2). The stabilizing bolt (30) is threadedly matched with the stabilizing screw hole (37).

4. A sampling machine for testing cement pavement according to claim 3, characterized in that: A locking structure is provided between the rotating roller (38) and the stabilizing head (29). The locking structure consists of a screw seat (40) and a fixing bolt (41). The screw seat (40) is fixedly installed on the upper part of the stabilizing head (29). The fixing bolt (41) is threadedly connected to the center position of the screw seat (40). The top end of the rotating roller (38) passes through the stabilizing head (29) and is fixedly connected to a fixing shaft (39). The outer surface of the fixing shaft (39) is provided with a fixing screw hole, which is threadedly matched with the fixing bolt (41).

5. A sampling machine for testing cement pavement according to claim 4, characterized in that: A rectangular rod is fixedly installed at the center of the fixed sleeve (33), and a rectangular groove is provided at the center of the movable rod (34). The rectangular rod and the rectangular groove are adaptively matched.

6. A sampling machine for testing cement pavement according to claim 5, characterized in that: The notch (35) is adapted to the baffle (27), and the outer surface of the protective cover (12) is provided with a guide groove (31), which is adapted to the guide rod (28).

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