Pavement thickness detection device

Abstract

The utility model relates to the technical field of road surface detection, and discloses a road surface thickness detection device, which comprises a support frame; a sampling barrel; the power assembly and the lifting assembly are mounted on the support frame and are respectively used for driving the sampling barrel to rotate and move up and down; the clamping assembly comprises a plurality of rotating rods and clamping blocks, the rotating rods and the clamping blocks are arranged in a one-to-one correspondence mode, the rotating rods are rotationally connected into the wall of the sampling barrel, the axial direction of the rotating rods is parallel to the axial direction of the sampling barrel, the lower ends of the rotating rods are fixedly connected with one ends of the clamping blocks, and the clamping blocks are arranged on the wall of the sampling barrel; the clamping block is arranged on the sampling barrel and can move between a first position and a second position, the clamping block is accommodated in the wall of the sampling barrel at the first position, and the other end of the clamping block extends out of the inner side of the wall of the sampling barrel at the second position. The clamping block can be accommodated in the wall of the sampling barrel at the first position, so that the normal cut-in and rotation of the sampling barrel are not influenced, and the problem that the sampling barrel of the existing device is difficult to enter a seam surface is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of road surface testing technology, and in particular to a road surface thickness testing device. Background Technology

[0002] Road surface thickness testing devices play a crucial role in road construction and maintenance. With the rapid development of modern transportation, roads, as a core component of transportation infrastructure, directly impact driving safety and road lifespan. Road surface thickness is a key indicator of road quality, affecting not only load-bearing capacity and durability but also fatigue resistance.

[0003] However, existing pavement thickness detection devices have some problems that urgently need to be solved. Taking a pavement thickness detection device patent document with announcement number CN222689067U as an example, although this device has solved the problems of sample falling during sampling and difficulty in retrieving the sample after sampling to a certain extent, it still has shortcomings in practical applications. When using a sampling tube for core drilling, the slit cut by the sampling tube is very small, usually only about 5mm. However, in existing devices, due to the presence of limiting rods, fixing rods, and linkage frames, the wall thickness of the sampling tube increases, making it difficult for the sampling tube to enter the slit surface and complete the core drilling work.

[0004] Given the shortcomings of the existing technology, it is particularly necessary to develop a road surface thickness detection device that can effectively solve the problem of the sampling tube being difficult to enter the joint surface while ensuring that the sample does not fall off. Utility Model Content

[0005] The present invention aims to provide a road surface thickness detection device to overcome the shortcomings mentioned above.

[0006] To achieve the above objectives, the technical solution of this utility model is: a road surface thickness detection device, comprising:

[0007] Support frame;

[0008] Sampling tube;

[0009] The power assembly and lifting assembly mounted on the support frame are used to drive the sampling cylinder to rotate and move up and down, respectively; and

[0010] A clamping assembly installed on the sampling cylinder includes a plurality of rotating rods and clamping blocks arranged in a one-to-one correspondence. The rotating rods are rotatably connected inside the wall of the sampling cylinder, and the axial direction of the rotating rods is parallel to the axial direction of the sampling cylinder. The lower end of the rotating rod is fixedly connected to one end of the clamping block. The clamping block is disposed on the wall of the sampling cylinder and is movable between a first position and a second position. In the first position, the clamping block is housed inside the wall of the sampling cylinder, and in the second position, the other end of the clamping block extends out from the inner side of the wall of the sampling cylinder.

[0011] Furthermore, the clamping assembly also includes:

[0012] Multiple driven gears are rotatably connected to the top plate of the sampling cylinder. The upper ends of the multiple rotating rods pass through the top plate of the sampling cylinder one by one and are connected to the multiple driven gears one by one by key. The multiple driven gears are spaced apart along the axis of the sampling cylinder.

[0013] A drive gear is rotatably connected to the top plate of the sampling cylinder, and a plurality of driven gears are located on the periphery of the drive gear and mesh with it for transmission.

[0014] Furthermore, the clamping assembly also includes:

[0015] A gearbox is fixedly mounted on the upper end of the sampling cylinder, and both the driving gear and the driven gear are located inside the gearbox;

[0016] A worm gear and a worm are rotatably connected inside the gearbox. The worm gear is coaxially and fixedly connected to the driving gear, and the worm meshes with the worm gear.

[0017] Furthermore, multiple support seats are fixedly connected inside the gearbox, the rotating shaft of the worm passes through the support seats and is rotatably connected thereto, and one end of the rotating shaft of the worm passes through the gearbox and is connected to a first handwheel.

[0018] Furthermore, the transmission ratio between the driving gear and the driven gear is less than 1, and the driven gear is a half gear.

[0019] Furthermore, the power assembly includes:

[0020] A sliding frame, wherein the lifting assembly is used to drive the sliding frame to move up and down;

[0021] A drive motor is fixedly connected to the sliding frame, and the output shaft of the drive motor is driven by a drive pulley; and

[0022] A driven shaft is rotatably connected to the sliding frame. The lower end of the driven shaft is fixedly connected to the gearbox. A driven pulley is keyed to the driven shaft. The driven pulley and the driving pulley are connected by belt drive.

[0023] Furthermore, the transmission ratio between the driving pulley and the driven pulley is less than 1.

[0024] Furthermore, the lifting assembly includes:

[0025] A guide rod is fixedly connected vertically above the support frame, and the sliding frame is slidably connected to the guide rod; and

[0026] A threaded rod is rotatably connected to the support frame in the vertical direction, and the sliding frame is threadedly connected to the threaded rod.

[0027] Furthermore, there are two guide rods, which are located on both sides of the threaded rod, and the top of the two guide rods is fixedly connected to a top support frame. The upper end of the threaded rod passes through the top support frame and is connected to a second handwheel.

[0028] Furthermore, wheels and handles are mounted on the support frame.

[0029] Compared with the prior art, this utility model has at least the following advantages:

[0030] (1) By setting up a clamping component, the clamping block can be stored inside the sampling tube wall when in the first position, without affecting the normal cutting and rotation of the sampling tube, so that the sampling tube can smoothly enter the seam surface and complete the core drilling work. Since the axis of the rotating shaft is parallel to the axis of the sampling tube, compared with the prior art, the axis of rotation of the limiting rod is perpendicular to the axis of the sampling tube, which can effectively reduce the wall thickness of the sampling tube, solve the problem of the increased wall thickness of the sampling tube, effectively solve the problem of the sampling tube being difficult to enter the seam surface in the existing device, and improve the applicability of the device.

[0031] (2) The clamping assembly of this utility model realizes the flexible extension and retraction of the clamping block through the cooperation of the rotating rod and the clamping block, as well as the transmission of the driving gear and the driven gear in the gearbox, so that the core sample does not fall off during the sampling process, thereby improving the efficiency and quality of the sampling work. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of the road surface thickness detection device of this utility model;

[0034] Figure 2This is an assembly diagram of the sampling cylinder and clamping assembly of this utility model;

[0035] Figure 3 This is an assembly diagram of the rotating rod, clamping block, driven gear, and driving gear of this utility model.

[0036] Reference numerals in the attached drawings: 1. Support frame; 2. Sampling cylinder; 3. Rotating rod; 4. Clamping block; 5. Driven gear; 6. Driving gear; 7. Gearbox; 8. Worm gear; 9. Worm; 10. Support base; 11. Sliding frame; 12. Drive motor; 13. Driving pulley; 14. Driven shaft; 15. Driven pulley; 16. Guide rod; 17. Threaded rod; 18. Top support frame; 19. Wheel; 20. Handle. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Reference Figure 1-3 This utility model relates to a pavement thickness detection device, mainly used for accurate detection of pavement thickness during road construction and maintenance. The device mainly consists of a support frame 1, a sampling cylinder 2, a power assembly, a lifting assembly, and a clamping assembly. The support frame 1 serves as the basic framework of the entire device, providing a platform for the installation and support of other components and ensuring the stability and safety of the device during operation. The sampling cylinder 2 is a key component for cutting and core sampling of pavement material. The power assembly and lifting assembly drive the sampling cylinder 2 to rotate and move up and down, respectively. Through precise control and coordination, the sampling cylinder 2 can smoothly cut into the pavement and obtain a complete core sample. The clamping assembly is installed on the sampling cylinder 2 to clamp and fix the core sample during sampling, preventing it from falling out of the sampling cylinder 2 and ensuring the reliability of the measurement results.

[0040] The clamping assembly mainly includes multiple rotating rods 3 and multiple clamping blocks 4, with each rod corresponding to the other. The rotating rods 3 are rotatably connected inside the wall of the sampling cylinder 2, and the axis of the rotating rods 3 is parallel to the axis of the sampling cylinder 2. The lower end of the rotating rod 3 is fixedly connected to one end of a clamping block 4, which is mounted on the wall of the sampling cylinder 2 and can move between a first position and a second position. In the first position, the clamping block 4 is retracted inside the wall of the sampling cylinder 2, not affecting the normal insertion and rotation of the sampling cylinder 2. In the second position, the other end of the clamping block 4 extends from the inside of the wall of the sampling cylinder 2, clamping and fixing the core sample inside the sampling cylinder 2. This design allows the clamping assembly to flexibly adjust the position and state of the clamping blocks 4 according to different sampling stages and needs, thereby achieving effective clamping and protection of the core sample.

[0041] The clamping assembly also includes a gearbox 7 fixedly mounted on the upper end of the sampling cylinder 2, with both the driving gear 6 and driven gears 5 housed within the gearbox 7. The driving gear 6 is rotatably connected to the top plate of the sampling cylinder 2, and multiple driven gears 5 are spaced apart along the axis of the sampling cylinder 2 around the driving gear 6 and mesh with it for transmission. The upper ends of multiple rotating rods 3 penetrate the top plate of the sampling cylinder 2 and are keyed to the multiple driven gears 5. By rotating the driving gear 6, the multiple driven gears 5 can be rotated, thereby driving the multiple rotating rods 3 to rotate synchronously, thus realizing the clamping and releasing process of the clamping block 4 on the core sample. In addition, multiple support seats 10 are fixedly connected inside the gearbox 7, and the rotating shaft of the worm gear 9 passes through the support seat 10 and is rotatably connected to it. One end of the rotating shaft of the worm gear 9 passes through the gearbox 7 and is connected to a first handwheel. The worm gear 8 is coaxially and fixedly connected to the driving gear 6, and the worm 9 meshes with the worm gear 8. Rotating the first handwheel drives the worm 9 to rotate, which in turn causes the worm gear 8 and the driving gear 6 to rotate, thus controlling the driven gear 5 and the rotating rod 3. The transmission ratio between the driving gear 6 and the driven gear 5 is less than 1. This design allows for fine adjustment of the rotation angle of the driven gear 5, meeting different requirements for core sample clamping and release during sampling. Furthermore, using a half-gear for the driven gear 5 saves space in the gearbox 7.

[0042] In one specific embodiment of this utility model, four driven gears 5, four rotating shafts and four clamping blocks 4 are provided, and they are arranged in a circular array along the axial direction of the sampling cylinder 2.

[0043] The power assembly includes a sliding frame 11, a drive motor 12, a drive pulley 13, a driven shaft 14, a driven pulley 15, and a belt. The sliding frame 11 is driven up and down by a lifting assembly. The drive motor 12 is fixedly connected to the sliding frame 11, and its output shaft is driven by the drive pulley 13. The driven shaft 14 is rotatably connected to the sliding frame 11, and its lower end is fixedly connected to the gearbox 7 and keyed to the driven pulley 15. The drive pulley 13 and the driven pulley 15 are connected by a belt drive, and the transmission ratio between the drive pulley 13 and the driven pulley 15 is less than 1. This transmission ratio design ensures effective power transmission and reasonable speed matching, improving the working efficiency and stability of the device. During operation, the drive motor 12 drives the driven shaft 14 to rotate through the drive pulley 13 and the driven pulley 15, thereby realizing the rotation of the sampling cylinder 2.

[0044] The lifting assembly includes a guide rod 16, a threaded rod 17, a top support frame 18, and a second handwheel. The guide rod 16 is fixedly connected vertically above the support frame 1, and the sliding frame 11 is slidably connected to the guide rod 16, ensuring the stability and straightness of the sliding frame 11 during vertical movement. The threaded rod 17 is rotatably connected vertically above the support frame 1, and the sliding frame 11 is threadedly connected to the threaded rod 17. Rotating the threaded rod 17 causes the sliding frame 11 to move vertically, thus achieving the vertical displacement of the sampling cylinder 2. Two guide rods 16 are provided, located on either side of the threaded rod 17, with the top of each fixedly connected to the top support frame 18. The upper end of the threaded rod 17 passes through the top support frame 18 and is connected to the second handwheel, allowing the operator to manually control the rotation of the threaded rod 17 and precisely adjust the height of the sampling cylinder 2.

[0045] To improve the portability and operational flexibility of the device, wheels 19 and handles 20 are installed on the support frame 1. The wheels 19 allow the entire device to be easily moved between different testing locations, reducing the labor intensity and time cost of manual handling. The handles 20 facilitate the operator in pushing and controlling the direction of movement of the device, ensuring stability and safety during movement.

[0046] Working principle of this utility model:

[0047] When conducting road surface thickness testing, firstly, by rotating the first handwheel, multiple clamping blocks 4 are positioned in the first position, i.e., embedded inside the wall of the sampling cylinder 2. Then, by rotating the second handwheel, the threaded rod 17 drives the sliding frame 11 downwards, and the sampling cylinder 2 gradually contacts the road surface. At this point, the drive motor 12 is started, driving the driven shaft 14 and gearbox 7 to rotate via belt transmission. The second handwheel is then rotated, causing the sampling cylinder 2 to move downwards while rotating, initiating drilling and sampling of the road surface. When the sampling cylinder 2 has penetrated the road surface to a certain depth and the core sample has been extracted, the drive motor 12 is turned off. After the sampling cylinder 2 comes to a stop, the first handwheel is rotated in the opposite direction, causing multiple clamping blocks 4 to be positioned in the second position, i.e., the other end of the clamping blocks 4 extends from the inside of the wall of the sampling cylinder 2 and abuts against the bottom of the core sample, clamping and fixing the core sample inside the sampling cylinder 2. Then, the drive motor 12 is turned on, and the second handwheel is rotated in the opposite direction, causing the sliding frame 11 to move the sampling cylinder 2 upwards until the sampling cylinder 2 is completely detached from the road surface. Finally, move the support frame 1 so that the sampling cylinder 2 is offset from the borehole, turn off the drive motor 12, and rotate the first handwheel again to make the multiple clamping blocks 4 be in the first position, that is, embedded in the wall of the sampling cylinder 2. At this time, the clamping blocks 4 are released from the core sample. The core sample is taken out of the sampling cylinder 2 by tapping the sampling cylinder 2. Then, the thickness of the core sample is measured by a measuring tool to obtain the thickness data of the road surface.

[0048] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A road surface thickness detecting device characterized by comprising: The utility model relates to a kind of sampling device, including: Support frame (1); Sampling cylinder (2); Power assembly and lifting assembly are installed on the support frame (1), respectively for driving the sampling cylinder (2) rotation and up and down movement;And Clamping assembly is installed on the sampling cylinder (2), and the clamping assembly includes a plurality of one-to-one corresponding setting rotating rod (3) and clamping block (4), the rotating rod (3) is rotatably connected in the sampling cylinder (2) cylinder wall, and the axial direction of the rotating rod (3) is parallel with the axial direction of the sampling cylinder (2), the lower end of the rotating rod (3) is fixedly connected with one end of clamping block (4), and the clamping block (4) is arranged on the sampling cylinder (2) cylinder wall and can be moved between first position and second position, in the first position, the clamping block (4) is housed in the sampling cylinder (2) cylinder wall, in the second position, the other end of the clamping block (4) extends from the inside of the sampling cylinder (2) cylinder wall.

2. The road surface thickness detection device according to claim 1, characterized by The clamping assembly further includes: A plurality of driven gears (5) are rotatably connected on the top plate of the sampling cylinder (2), and the upper end of a plurality of the rotating rod (3) is one-to-one corresponding and penetrates the top plate of the sampling cylinder (2) and is one-to-one corresponding and key-connected with a plurality of the driven gears (5), and a plurality of the driven gears (5) are spaced along the axis of the sampling cylinder (2); Driving gear (6) is rotatably connected on the top plate of the sampling cylinder (2), and a plurality of the driven gears (5) are located on the side of the driving gear (6) and are in mesh transmission.

3. The road surface thickness detection device according to claim 2, characterized by The clamping assembly further includes: Gearbox (7) is arranged on the upper end of the sampling cylinder (2), and the driving gear (6) and the driven gear (5) are arranged in the gearbox (7); Worm gear (8) and worm (9) are rotatably connected in the gearbox (7), the worm gear (8) is coaxially fixedly connected with the driving gear (6), and the worm (9) is in mesh with the worm gear (8).

4. The road surface thickness detection device according to claim 3, characterized by A plurality of support seats (10) are fixedly connected in the gearbox (7), the rotating shaft of the worm (9) penetrates the support seat (10) and is rotatably connected therewith, and one end of the rotating shaft of the worm (9) penetrates the gearbox (7) and is connected with the first hand wheel.

5. The road surface thickness detection device according to claim 4, characterized by The transmission ratio between the driving gear (6) and the driven gear (5) is less than 1, and the driven gear (5) is a half gear.

6. The road surface thickness detection device according to claim 3, characterized by The power assembly includes: The lifting assembly is used for driving the sliding frame (11) to move up and down; Driving motor (12) is fixedly connected on the sliding frame (11), and the output shaft of the driving motor (12) is drivingly connected with driving pulley (13);And Driven shaft (14) is rotatably connected on the sliding frame (11), the lower end of the driven shaft (14) is fixedly connected with the gearbox (7), the driven shaft (14) is key-connected with driven pulley (15), and the driven pulley (15) and the driving pulley (13) are drivingly connected through the belt.

7. The pavement thickness detection apparatus according to claim 6, characterized by The transmission ratio between the driving pulley (13) and the driven pulley (15) is less than 1.

8. The pavement thickness detection apparatus according to claim 6, characterized by The lifting assembly includes: A guide rod (16) is fixedly connected above the support frame (1) in the vertical direction, and the sliding frame (11) is in sliding connection with the guide rod (16); and A threaded rod (17) is rotatably connected above the support frame (1) in the vertical direction, and the sliding frame (11) is in threaded connection with the threaded rod (17).

9. The pavement thickness detection apparatus according to claim 8, characterized by The guide rod (16) is provided with two, the two guide rods (16) are located on both sides of the threaded rod (17), and the top of the two guide rods (16) is fixedly connected with a top support frame (18), and the upper end of the threaded rod (17) penetrates through the top support frame (18) and is connected with a second hand wheel.

10. The pavement thickness detection apparatus according to any one of claims 1 to 9, characterized by The support frame (1) is provided with a wheel (19) and a handle (20).

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