A road thickness detection coring device

Abstract

The present invention relates to the technical field of highway thickness detection, and specifically provides a highway thickness detection coring device, comprising a frame, on which a coring cylinder, a driving assembly, a propulsion assembly and a pulling assembly are arranged. The driving assembly drives the coring cylinder to rotate, the propulsion assembly pushes the coring cylinder to move up and down, and the pulling assembly can make the force on the coring cylinder more uniform, reduce the fluctuation in the sampling process of the coring cylinder, thereby improving the sampling accuracy and also extending the service life of the coring cylinder. A scraping block is arranged on the side wall of the coring cylinder, and the scraping block enables the coring cylinder to scrape the side wall of the hole drilled by the coring cylinder into a wavy shape during the sampling process, so that when the hole is filled, the filler can be supported by the wavy side wall, thereby reducing the probability of sedimentation of the filler at the hole.

Description

Technical Field

[0001] The invention relates to the technical field of highway thickness detection, in particular to a highway thickness detection coring device. Background Art

[0002] Highway inspection coring device is a device used to take samples from the road surface. It is mainly used in quality inspection work in highway construction and maintenance. By coring, cylindrical samples can be obtained from the road surface, which is convenient for laboratory or field testing, and then the thickness, material properties, structural strength and construction quality of the road surface can be evaluated.

[0003] For example, Chinese patent CN219798795U discloses a thickness detection device for highway engineering construction. This solution realizes a method for accurately judging the thickness of each layer of the highway by setting a coring cylinder, a movable cap mechanism, and a cooling mechanism. During the coring process, the heat and debris generated at the bottom of the coring cylinder are flushed out by cooling water. At the same time, when the coring cylinder is rotated under the road surface, the thickness of each layer of the road surface can be judged by displaying the extended length of the core rod.

[0004] However, in the above scheme, the length of the coring cylinder is relatively long, and it is easy to be affected by uneven force distribution during operation, especially when the coring cylinder is subjected to lateral force or tilting force, it will cause the coring cylinder to swing, thereby resulting in poor coring quality. At the same time, the holes after coring need to be filled in time. The holes in the prior art are all cylindrical, and settlement is prone to occur during filling, resulting in depressions in that area. Summary of the invention

[0005] Based on this, it is necessary to provide a road thickness detection coring device to address the problem that the current coring barrel is prone to swaying during coring and settling when filling holes.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A road thickness detection coring device, comprising:

[0008] A frame, on which a coring barrel is arranged, the bottom of which is open and a coring drill bit is distributed on the edge, and the coring barrel rotates around its own axis to cut the road surface;

[0009] A propulsion assembly, wherein the propulsion assembly can push the coring cylinder to move axially;

[0010] A pulling assembly, wherein the pulling assembly includes a supporting plate and a steel cable, wherein the supporting plate is located above the coring cylinder and is fixedly connected to the coring cylinder, wherein there are multiple steel cables, and the multiple steel cables are distributed along the circumference of the supporting plate, and the two ends of the multiple steel cables are respectively connected to the lower end of the supporting plate and the upper end of the coring cylinder.

[0011] Furthermore, a retractable scraper block is provided on the side wall of the coring cylinder, the scraper block is connected to the steel cable, a reciprocating assembly is provided on the carrying plate, the reciprocating assembly can reciprocately pull or push the steel cable, and the scraper block is configured as follows:

[0012] When the scraper block is pulled by the steel cable, the scraper block extends out of the side wall and scrapes the side wall of the hole drilled by the coring cylinder. When the scraper block is not pulled by the steel cable, the scraper block is retracted into the side wall and does not contact the side wall of the hole.

[0013] Furthermore, the reciprocating component includes a spiral rod and a slider, a double spiral groove is provided on the outer circumference of the spiral rod, two spiral lines of the double spiral groove are opposite, and the pitches of the two spiral lines are the same, a connecting circular hole is provided on the supporting plate, and the slider is hinged on the inner wall of the connecting circular hole. When the spiral rod is located in the connecting circular hole, the slider is located in the double spiral groove, and the lower end of the spiral rod is connected to the steel cable. When the core sampling cylinder rotates, the spiral rod is driven to rotate and move axially back and forth.

[0014] Furthermore, a sleeve is fixedly provided on the frame, and the sleeve is sleeved on the driving shaft of the coring cylinder. A gear ring is fixedly provided on the outer periphery of the sleeve, and a transmission gear is coaxially and fixedly provided on the upper end of the spiral rod. The transmission gear is transmission-connected with the gear ring, and the driving shaft drives the coring cylinder to rotate to drive the supporting plate to rotate, and the sleeve rotates relative to the supporting plate to drive the transmission gear to rotate, and the transmission gear drives the spiral rod to rotate.

[0015] Furthermore, a reduction assembly is provided between the transmission gear and the gear ring, and the reduction assembly can slow down the rotation speed of the screw rod.

[0016] Furthermore, the reduction gear assembly includes a first reduction gear and a second reduction gear, the diameter of the first reduction gear is larger than the diameter of the second reduction gear, the first reduction gear is rotatably arranged at an eccentric position of the carrying plate, the first reduction gear is meshed with the gear ring, the second reduction gear is coaxial and fixedly arranged on the first reduction gear, and the second reduction gear is meshed with the transmission gear.

[0017] Furthermore, the propulsion assembly includes a screw and a sliding plate, the sliding plate is arranged on the frame and can slide in the vertical direction, the sliding plate is connected to the core sampling cylinder, the screw is rotatably arranged on the frame, the screw is spirally connected to the sliding plate, the screw rotates to drive the sliding plate to slide in the vertical direction, and the sliding plate drives the core sampling cylinder to move in the vertical direction.

[0018] Furthermore, a rotating hand wheel is coaxially and fixedly provided on the upper end of the screw.

[0019] Furthermore, a driving assembly is provided on the frame, and the driving assembly includes a driving motor, a rotating shaft of the driving motor is connected to a driving shaft of the coring cylinder, and the driving motor rotates to drive the coring cylinder to rotate.

[0020] Furthermore, a push handle is provided on the frame, and rollers are provided at the bottom of the frame.

[0021] The beneficial effects of the present invention are:

[0022] The present invention provides a pulling assembly so that when the coring cylinder rotates at high speed, the pulling assembly can make the force on the coring cylinder more uniform, reduce fluctuations in the sampling process of the coring cylinder, thereby improving the accuracy of sampling and also extending the service life of the coring cylinder.

[0023] The present invention provides a reciprocating assembly and a scraper block so that the coring barrel can scrape the side wall of the hole drilled by the coring barrel into a wavy shape during the sampling process, so that when the hole is filled, the filler can be supported by the wavy side wall, reducing the probability of sedimentation of the filler in the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a road thickness detection coring device provided in one embodiment of the present invention;

[0025] Figure 2 A partially exploded view of a road thickness detection coring device provided by an embodiment of the present invention;

[0026] Figure 3 for Figure 2 A partial enlarged view of part A of a road thickness detection coring device provided in an embodiment;

[0027] Figure 4 A front view of a road thickness detection coring device provided in one embodiment of the present invention;

[0028] Figure 5 for Figure 4 An axonometric view of a highway thickness detection coring device provided in an embodiment of the present invention cut along XX;

[0029] Figure 6 for Figure 5 A partial enlarged view of part B of a road thickness detection coring device provided in an embodiment;

[0030] Figure 7 for Figure 5 A partial enlarged view of part C of a road thickness detection coring device provided in an embodiment.

[0031] in:

[0032] 100, frame; 110, push handle; 120, roller; 130, support rod; 140, sliding plate; 150, screw rod; 160, rotating hand wheel; 170, driving motor;

[0033] 200, coring barrel; 210, driving shaft; 220, square hole; 230, bearing plate; 231, connecting circular hole; 240, steel cable; 250, sleeve; 251, gear ring; 260, spiral rod; 261, double spiral groove; 270, transmission gear; 280, slider;

[0034] 300, reduction gear assembly; 310, first reduction gear; 320, second reduction gear;

[0035] 400, scraper block; 410, spring. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Refer to the following Figure 1-Figure 7 To describe a highway thickness detection coring device provided by the present invention.

[0040] A highway thickness detection coring device is suitable for coring the highway surface, comprising a frame 100, on which a coring barrel 200 is arranged, the bottom of the coring barrel 200 is open and a coring drill is distributed on the edge, and the coring drill is detachably arranged at the bottom of the coring barrel 200 for easy replacement. The coring barrel 200 rotates at high speed to cut the road surface, and a propulsion assembly is also arranged on the frame 100, which is used to push the coring barrel 200 to move in the vertical direction, so that the coring barrel 200 continuously extends into the inside of the road surface to coring the road surface, and the obtained sample is inside the coring barrel 200, and the thickness of the highway can be known by measuring the thickness of the sample.

[0041] However, during the sampling process, the coring cylinder 200 will swing when drilling into the road surface, which will reduce the sampling accuracy and cause greater damage to the coring sleeve 250, which is not conducive to long-term use. Therefore, the present invention provides a pulling assembly on the frame 100, and the pulling assembly is used to make the coring cylinder 200 more evenly stressed during rotation, thereby reducing the swing of the coring cylinder 200. The pulling assembly includes a supporting disk 230 and a plurality of steel cables 240. The supporting disk 230 is fixedly arranged on the driving shaft 210 of the coring cylinder 200. The supporting disk 230 and the coring cylinder 200 rotate synchronously. The diameter of the supporting disk 230 is larger than the diameter of the coring cylinder 200. The two ends of the plurality of steel cables 240 are respectively connected to the lower end of the supporting disk 230 and the upper end of the coring cylinder 200. The plurality of steel cables 240 are distributed along the circumference of the supporting disk 230 and the coring cylinder 200. By pulling the plurality of steel cables 240, the uneven force when the coring cylinder 200 rotates at a high speed can be reduced, thereby improving the sampling accuracy and also extending the service life of the coring cylinder 200.

[0042] It should be noted that the number of the steel cables 240 in this embodiment is two, and the two steel cables 240 are symmetrically arranged. Of course, it is not limited to two steel cables 240, and the number may be three, four, etc., as long as they are evenly distributed.

[0043] In a further embodiment, a retractable scraper block 400 is further provided on the side wall of the core cylinder 200, and there are also a plurality of scraper blocks 400, each of which is connected to a steel cable 240. A square hole 220 is provided on the side wall of the core cylinder 200, and the position of the square hole 220 is located in the middle of the side wall, and the scraper block 400 is hinged in the square hole 220. The scraper block 400 is roughly triangular in shape, such as Figure 7As shown, one of the tips is hinged on the side wall of the square hole 220, and a surface corresponding to the hinge position is an arcuate surface, which is in sliding contact with the lower end surface of the square hole 220, and a surface close to the outer side of the coring cylinder 200 is fixedly connected to the steel cable 240 (a sliding groove is provided on the side wall of the coring cylinder 200, and the sliding groove connects the upper end surface of the coring cylinder 200 and the upper end surface of the square hole 220, and the steel cable 240 passes through the sliding groove and enters the square hole 220 to connect with the scraper block 400), and a spring 410 is sleeved on the steel cable 240, and one end of the spring 410 abuts against a surface where the scraper block 400 is connected to the steel cable 240. The other end of the spring 410 abuts against the upper end surface of the square hole 220, and in the initial state, the spring 410 is in a compressed state. The spring 410 pushes the scraper block 400 to retract into the square hole 220 so that the scraper block 400 does not contact the side wall of the hole drilled by the coring cylinder 200. When the steel cable 240 pulls the scraper block 400, the pulling force of the steel cable 240 overcomes the elastic force of the spring 410 and pulls the scraper block 400 to rotate outward so that the scraper block 400 extends out of the square hole 220. The coring cylinder 200 drives the scraper block 400 to rotate at high speed to scrape the side wall of the hole drilled by the coring cylinder 200, thereby scraping an annular groove out of the side wall of the hole.

[0044] It should be noted that a reciprocating assembly is provided on the supporting plate 230, and the reciprocating assembly can reciprocately pull or push the steel cable 240 so that the scraper block 400 can extend or retract into the square hole 220. When the reciprocating assembly pulls the steel cable 240, the scraper block 400 gradually extends from the square hole 220. When the reciprocating assembly pushes the steel cable 240, the scraper block 400 gradually retracts. At the same time, the core barrel 200 continuously moves downward, so that the scraper block 400 scrapes out a wavy side wall (the wavy side wall is the side wall of the section cut along the axial direction of the hole drilled by the core barrel 200 is wavy). When filling the hole, if it is a cylindrical hole, the side wall is a vertical surface and cannot support the filler, and can only be supported by the bottom of the hole. The wavy side wall can play a role in supporting the filler, thereby reducing the probability of settlement in the hole.

[0045] Specifically, the reciprocating assembly includes a screw rod 260 and a slider 280. A double spiral groove 261 is formed on the outer circumference of the screw rod 260. Figure 3As shown, the two spiral lines of the double spiral groove 261 are opposite, and the pitches of the two spiral lines are the same. A connecting circular hole 231 is opened on the carrier plate 230, and the slider 280 is hinged on the inner wall of the connecting circular hole 231. The shape of the slider 280 is elliptical. When the screw rod 260 is located in the connecting circular hole 231, the slider 280 is located in the double spiral groove 261 of the screw rod 260. When the screw rod 260 rotates, the screw rod 260 reciprocates along the axial direction under the action of the slider 280, that is, when the screw rod 260 rotates in one direction, the slider 280 is in the double spiral groove 261. The slider 280 slides in one of the spiral grooves to push the spiral rod 260 to move axially. When the slider 280 slides to the extreme position in the spiral groove, the slider 280 enters into the other spiral groove in the double spiral groove 261, thereby pushing the spiral rod 260 to move in the opposite direction, thereby realizing the reciprocating movement of the spiral rod 260, and the bottom of the spiral rod 260 is connected to the steel cable 240 to push or pull the steel cable 240 to realize the inward and outward contraction of the scraper block 400 in the square hole 220, so that the side wall of the hole drilled by the core sampling cylinder 200 can be scraped into a wavy shape, thereby reducing the probability of settlement of the hole.

[0046] In a further embodiment, in order to facilitate the driving of the spiral rod 260 to rotate, a sleeve 250 is fixedly provided on the frame 100, and the sleeve 250 is sleeved on the driving shaft 210 of the coring cylinder 200. When the coring cylinder 200 rotates, the sleeve 250 is fixed on the frame 100, and the coring cylinder 200 and the sleeve 250 rotate relative to each other. A gear ring 251 is fixedly provided on the outer periphery of the sleeve 250, and a transmission gear 270 is provided on the upper end of the spiral rod 260. When the coring cylinder 200 rotates, it drives the supporting plate 230 to rotate synchronously. When the transmission gear 270 is connected to the gear ring 251, it can drive the spiral rod 260 to rotate, thereby enabling the spiral rod 260 to move back and forth axially.

[0047] Specifically, in one embodiment of the present invention, a reduction assembly 300 is provided between the transmission gear 270 and the gear ring 251. The reduction assembly 300 is used to slow down the rotation speed of the spiral rod 260. Since the core barrel 200 rotates at a very high speed when in operation, if the reduction assembly 300 is not provided, the rotation speed of the spiral rod 260 will also be very fast, which will cause the axial reciprocating movement speed of the spiral rod 260 to also increase, thereby causing the scraper block 400 to scrape the side wall of the hole drilled by the core barrel 200 with poor effect. That is to say, the speed of the scraper block 400 retracting and extending inwards increases, resulting in a very small wavy interval formed on the side wall, which is not conducive to the support of the wavy side wall for the filler. Therefore, the reduction assembly 300 is provided to make the scraper block 400 retract and extend inwards at a moderate speed.

[0048] More specifically, the reduction gear assembly 300 in this embodiment includes a first reduction gear 310 and a second reduction gear 320. The diameter of the first reduction gear 310 is larger than the diameter of the second reduction gear 320. The first reduction gear 310 is rotatably arranged at the eccentric position of the carrier plate 230, and the specific position is on the line connecting the axis of the gear ring 251 and the transmission gear 270. The first reduction gear 310 is meshed with the gear ring 251, and the second reduction gear 320 is coaxially and fixedly arranged on the first reduction gear 310. The second reduction gear 320 is meshed with the transmission gear 270. When the coring cylinder 200 rotates, the coring cylinder 200 drives the carrier plate 230 rotates, and the sleeve 250 is stationary on the frame 100. The supporting plate 230 drives the first reduction gear 310 and the second reduction gear 320 to revolve around the axis of the coring barrel 200. Since the first reduction gear 310 and the gear ring 251 are engaged, the gear ring 251 drives the first reduction gear 310 to rotate, and the first reduction gear 310 drives the second reduction gear 320 to rotate. The second reduction gear 320 rotates with the transmission gear 270, and the radius of the second reduction gear 320 is smaller than the radius of the first reduction gear 310. The rotation speed of the transmission gear 270 is smaller than the rotation speed of the coring barrel 200, thereby achieving a deceleration function.

[0049] It should be noted that the reduction assembly 300 is not limited to the above structure. There are many other structures that can achieve the above reduction function, such as pulley reducers and planetary reducers, etc., which are not specifically limited here.

[0050] In a further embodiment, the propulsion assembly of the present invention includes a screw 150 and a sliding plate 140, the sliding plate 140 is slidably arranged on the frame 100, the sliding plate 140 can slide in the vertical direction, the screw 150 is rotatably arranged on the frame 100, and the screw 150 is vertically arranged on the frame 100, the screw 150 has two parts, one part is rotatably connected to the frame 100 and can only rotate around its own axis, and the other part is provided with a thread, and the screw 150 and the sliding plate 140 are screwed together. The screw 150 is connected in a rotational manner. When the screw 150 rotates, the sliding plate 140 can be driven to move in the vertical direction. To facilitate the sliding plate 140 to slide in the vertical direction, a vertically arranged support rod 130 is fixedly provided on the frame 100. Both sides of the sliding plate 140 are slidably inserted on the two vertically arranged support rods 130. The sliding plate 140 is connected to the sleeve 250 on the frame 100. When the sliding plate 140 moves, it drives the sleeve 250 to move and then drives the core barrel 200 to move in the vertical direction.

[0051] Specifically, a rotating hand wheel 160 is coaxially and fixedly provided at the upper end of the screw rod 150 , and the operator can drive the sliding plate 140 to move up and down by turning the rotating hand wheel 160 , and the sliding plate 140 drives the coring barrel 200 to move up and down.

[0052] Of course, a motor may also be connected to the upper end of the screw rod 150 , and when the motor is powered on, the screw rod 150 may be driven to rotate to achieve the function of moving the coring barrel 200 up and down.

[0053] In a further embodiment, a driving assembly is also provided on the frame 100 of the present invention, and the driving assembly includes a driving motor 170, and the driving motor 170 is used to drive the rotation of the coring cylinder 200. The rotating shaft of the driving motor 170 is fixedly connected to the driving shaft 210 of the coring cylinder 200, and the driving motor 170 is fixed on the sliding plate 140. When the driving motor 170 is working, it drives the driving shaft 210 of the coring cylinder 200 to rotate, and the driving shaft 210 drives the coring cylinder 200 to rotate.

[0054] Specifically, a push handle 110 is provided on the frame 100 of the present invention, and a roller 120 is provided at the bottom of the frame 100. The operator can hold the push handle 110 to push the frame 100 to move, thereby adjusting the position of coring.

[0055] The specific working process of a road thickness detection coring device provided by the present invention is described in combination with the above embodiments:

[0056] The operator holds the push handle 110 to push the highway thickness detection coring device to the sampling position, starts the drive motor 170, and at the same time, the operator turns the rotating hand wheel 160 to gradually move the coring cylinder 200 downward. The driving motor 170 rotates to drive the coring cylinder 200 to rotate. Since the bearing plate 230 and the driving shaft 210 of the coring cylinder 200 are fixedly connected, the bearing plate 230 and the coring cylinder 200 rotate synchronously, and the bearing plate 230 drives the first reduction gear 310, the second reduction gear 320, and the spiral rod 260. The core barrel 200 revolves around the axis of the core barrel 200. Since the sleeve 250 is fixedly connected to the sliding plate 140, the toothed ring 251 on the outer periphery of the sleeve 250 drives the first reduction gear 310 to rotate, the first reduction gear 310 drives the second reduction gear 320 to rotate, the second reduction gear 320 drives the transmission gear 270 to rotate, and the transmission gear 270 drives the screw rod 260 to rotate. Since the screw rod 150 has a double helical groove 261, and the slider 280 in the double helical groove 261 is hinged on the inner wall of the connecting circular hole 231 of the carrier plate 230, the screw rod 260 is rotated. The rod 260 not only rotates around its own axis but also reciprocates in the vertical direction, and the lower end of the spiral rod 260 is fixedly connected to the steel cable 240. When the spiral rod 260 moves upward, the steel cable 240 is pulled, and the steel cable 240 overcomes the elastic force of the spring 410, thereby gradually pulling the scraper block 400 to extend in and out of the direction hole. The scraper block 400 gradually extends out of the side wall of the coring cylinder 200 and contacts the side wall of the hole drilled by the coring cylinder 200, thereby scraping the side wall of the hole; when the spiral rod 260 moves downward, the elastic force of the spring 410 pulls the steel cable 240, so that the scraper block 400 gradually retracts into the square hole 220, and the scraper block 400 gradually separates from the side wall of the hole. The reciprocating up and down movement of the spiral rod 260 causes the scraper block 400 to scrape the side wall of the hole into a wavy shape. When the hole is subsequently filled, the filler can be supported by the wavy side wall, reducing the probability of the filler in the hole settling. At the same time, the steel cable 240 is always in a taut state, which can make the force on the coring cylinder 200 more uniform and reduce the fluctuation of the coring cylinder 200, thereby improving the sampling accuracy and extending the service life of the coring cylinder 200.

[0057] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A road thickness detection coring device, characterized in that: include: A frame, on which a coring barrel is arranged, the bottom of which is open and a coring drill bit is distributed on the edge, and the coring barrel rotates around its own axis to cut the road surface; A propulsion assembly, wherein the propulsion assembly can push the coring cylinder to move axially; A pulling assembly, the pulling assembly comprising a bearing plate and a steel cable, the bearing plate being located above the coring cylinder and fixedly connected to the coring cylinder, the steel cables being provided in a plurality, the plurality of steel cables being distributed along the circumference of the bearing plate, the two ends of the plurality of steel cables being respectively connected to the lower end of the bearing plate and the upper end of the coring cylinder; A retractable scraper block is provided on the side wall of the core-taking cylinder, and the scraper block is connected to the steel cable. A reciprocating assembly is provided on the carrier plate, and the reciprocating assembly can reciprocate and pull or push the steel cable. The scraper block is configured as follows: When the scraper block is pulled by the steel cable, the scraper block extends out of the side wall, and the scraper block scrapes the side wall of the hole drilled by the coring cylinder; when the scraper block is not pulled by the steel cable, the scraper block retracts into the side wall, and the scraper block does not contact the side wall of the hole; The reciprocating assembly includes a spiral rod and a slider. A double spiral groove is provided on the outer circumference of the spiral rod. The two spiral lines of the double spiral groove are opposite to each other and have the same pitch. A connecting circular hole is provided on the carrier plate. The slider is hinged on the inner wall of the connecting circular hole. When the spiral rod is located in the connecting circular hole, the slider is located in the double spiral groove. The lower end of the spiral rod is connected to the steel cable. When the coring cylinder rotates, the spiral rod is driven to rotate and reciprocate axially. A sleeve is fixedly arranged on the frame, and the sleeve is sleeved on the driving shaft of the coring cylinder. A gear ring is fixedly arranged on the outer periphery of the sleeve. A transmission gear is coaxially and fixedly arranged on the upper end of the spiral rod. The transmission gear is transmission-connected with the gear ring. The driving shaft drives the coring cylinder to rotate to drive the supporting plate to rotate. The sleeve rotates relative to the supporting plate to drive the transmission gear to rotate, and the transmission gear drives the spiral rod to rotate.

2. The road thickness detection coring device according to claim 1, characterized in that: A reduction assembly is arranged between the transmission gear and the gear ring, and the reduction assembly can slow down the rotation speed of the screw rod.

3. The road thickness detection coring device according to claim 2, characterized in that: The reduction gear assembly includes a first reduction gear and a second reduction gear. The diameter of the first reduction gear is larger than the diameter of the second reduction gear. The first reduction gear is rotatably arranged at an eccentric position of the supporting plate. The first reduction gear is meshed with the gear ring. The second reduction gear is coaxial and fixedly arranged on the first reduction gear. The second reduction gear is meshed with the transmission gear.

4. The road thickness detection coring device according to claim 1, characterized in that: The propulsion assembly includes a screw and a sliding plate, wherein the sliding plate is arranged on the frame and can slide in the vertical direction, the sliding plate is connected to the coring cylinder, the screw is rotatably arranged on the frame, the screw is spirally connected to the sliding plate, the screw rotates to drive the sliding plate to slide in the vertical direction, and the sliding plate drives the coring cylinder to move in the vertical direction.

5. The road thickness detection coring device according to claim 4, characterized in that: A rotating hand wheel is coaxially and fixedly arranged on the upper end of the screw.

6. The road thickness detection coring device according to claim 1, characterized in that: The frame is provided with a driving assembly, which includes a driving motor. The rotating shaft of the driving motor is connected to the driving shaft of the coring cylinder. The driving motor rotates to drive the coring cylinder to rotate.

7. The road thickness detection coring device according to claim 1, characterized in that: The frame is provided with a pushing handle, and the bottom of the frame is provided with rollers.

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