A road surface coring device

Abstract

This utility model relates to the field of road coring technology and provides a road coring device, including a main housing. A drill cylinder is fixedly connected to the bottom of the main housing. Two clamping plates are movably embedded in the inner surface of the drill cylinder. A limiting plate is fixedly connected to the top of the clamping plates. Two limiting grooves are formed at the bottom of the main housing. The outer surface of the limiting plate is movably embedded in the limiting groove. A rotating rod is rotatably connected inside the main housing. Two synchronizing rods are fixedly connected to the outer surface of the rotating rod. A first connecting rod is rotatably connected to the end of the synchronizing rod away from the rotating rod. This utility model has a post-drilling clamping and extraction structure to avoid excessive local stress. During the extraction process, the core sample may break at the edges, lose particles, or deform, effectively maintaining its integrity and ensuring the accuracy of subsequent test results. It eliminates the need for forceful and potentially damaging methods such as knocking or twisting, reducing time and labor costs.

Description

Technical Field

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

[0002] Core samples are collected from the road surface and sent to the laboratory for analysis of the physical properties of the road materials, such as asphalt content, aggregate gradation, and porosity. This helps assess whether the road construction quality meets standards and provides a scientific basis for improving road quality. During road construction, core sampling is conducted on-site to test whether the thickness of each structural layer of the road surface meets design requirements and whether the compaction degree meets the specified standards. This allows for the timely detection of quality problems during construction, enabling appropriate adjustments to be made and preventing premature road damage and other quality accidents. For road surfaces with defects such as cracks, potholes, and ruts, core sampling devices collect core samples from the affected areas to help engineers analyze the type, cause, and severity of the defects, thereby developing accurate and effective repair plans.

[0003] However, existing technologies, such as Chinese Publication No. CN221506306U, "A Road Coring Device," disclose a road coring device including a base, a support frame at the upper end of the base, a lifting block at the center of the support frame, a handle at the center of the upper surface of the support frame, a drive connection between the support frame and the lifting block via the handle, a coring column at the front end of the lifting block, a drive mechanism at the rear end of the lifting block, a connecting seat at the upper end of the lifting block, and baffles on both sides of the connecting seat. This invention, when the drive mechanism drives the coring column to work, rotates a knob, which in turn drives a lead screw B to rotate simultaneously via a transmission rod. This causes the baffles to move up and down under the rotation of the lead screw B, effectively blocking dust and debris generated during coring column operation and preventing cooling water from splashing due to the rotation of the coring column.

[0004] However, this device lacks a post-drilling clamping and extraction structure, resulting in excessive local stress. During extraction, the core sample may break at the edges, lose particles, or deform, failing to maintain its integrity and thus hindering the accuracy of subsequent testing results. This necessitates the use of forceful methods such as tapping and twisting, which can damage the core sample and equipment, increasing time and labor costs. Furthermore, the device lacks a free-moving and fixing structure, preventing flexible transfer between different work locations and ensuring stable fixation on the ground. This makes it impossible to guarantee that the device will not shake or shift during core extraction, resulting in insufficient stability during drilling. Utility Model Content

[0005] The purpose of this invention is to solve the problems existing in the prior art, such as excessive local stress, core sample breakage, particle loss or deformation during extraction, failure to effectively maintain its integrity, and inability to ensure the accuracy of subsequent test results. These problems include the need to use laborious methods such as knocking and twisting, which are easy to damage the core sample and equipment, increase time and labor costs, prevent flexible transfer of the core extraction device between different work locations, and make it impossible to stably fix the core extraction device on the ground. Furthermore, these problems cannot be guaranteed to prevent the device from shaking or shifting during core extraction, and the lack of stability during drilling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a road core sampling device, comprising a main housing, a drill cylinder fixedly connected to the bottom of the main housing, two clamping plates movably embedded in the inner surface of the drill cylinder, a limiting plate fixedly connected to the top of the clamping plates, two limiting grooves opened at the bottom of the main housing, the outer surface of the limiting plate movably embedded in the limiting grooves, a rotating rod rotatably connected inside the main housing, two synchronizing rods fixedly connected to the outer surface of the rotating rod, a first connecting rod rotatably connected to the end of the synchronizing rod away from the rotating rod, the end of the first connecting rod away from the synchronizing rod rotatably connected to the top of the limiting plate, a worm gear fixedly sleeved on the outer surface of the rotating rod, a worm engagingly connected to the outer surface of the worm gear, and the other end of the first connecting rod pulling the limiting plate, causing the limiting plate and the clamping plate to simultaneously approach each other along the slotting direction of the limiting grooves, thereby clamping and fixing the internal soil core.

[0007] In a preferred embodiment, one end of the worm gear is rotatably connected to the inner surface of the main housing, and the other end of the worm gear is fixedly connected to an internal hexagon block. The outer surface of the internal hexagon block is rotatably connected to the outer side of the main housing, and the worm gear can be driven to rotate inside the main housing through the internal hexagon block.

[0008] In a preferred embodiment, a motor is fixedly connected to the top of the main housing, a lifting plate is rotatably connected to the outer surface of the motor's output rod, an mounting sleeve is fixedly fitted onto the outer surface of the motor, the bottom of the mounting sleeve is fixedly connected to the top of the lifting plate, and the motor is fixed above the lifting plate by the mounting sleeve.

[0009] In a preferred embodiment, two limiting rods are movably embedded inside the lifting plate. The two ends of the two limiting rods are fixedly connected to a fixing frame. An internal threaded sleeve is fixedly connected to one side of the lifting plate. A threaded rod is threadedly connected to the inner surface of the internal threaded sleeve. The outer surface of the threaded rod is rotatably connected to the outer surface of the fixing frame and extends out one end. A handwheel is fixedly connected to the extended end of the threaded rod. Rotating the thread will drive the internal threaded sleeve, and the lifting plate can only move along the axial direction of the limiting rods.

[0010] In a preferred embodiment, a pressure-bearing shell is fixedly connected to the bottom of the fixed frame, and a power rod is rotatably connected inside the pressure-bearing shell and extends out one end. Two driven cranks are fixedly sleeved on the outer surface of the power rod, and the power rod can rotate inside the pressure-bearing shell.

[0011] In a preferred embodiment, a second connecting rod is rotatably connected to the end of the driven crank away from the power rod, and a shaft block is rotatably connected to the end of the second connecting rod away from the driven crank. A pressure plate is fixedly connected to the bottom of the two shaft blocks, and multiple rollers are rotatably connected to the bottom of the pressure plate. The driven crank, which rotates with the power rod, will drive one end of the second connecting rod.

[0012] In a preferred embodiment, a plurality of positioning rods are movably embedded inside the pressure plate. The two ends of the plurality of positioning rods are fixedly connected to the inner surface of the pressure shell. The pressure plate and the rollers rise along the axial direction of the positioning rods. The rollers no longer contact the ground, and the pressure shell contacts the ground, thus completing the fixation of the device.

[0013] In a preferred embodiment, one end of the power rod is fixedly connected to a drive crank, and the end of the drive crank away from the power rod is rotatably connected to a hydraulic rod. The end of the hydraulic rod away from the drive crank is rotatably connected to one side of the pressure-bearing shell, and the hydraulic rod pushes one end of the drive crank.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. This utility model has a device with a post-drilling clamping and extraction structure to avoid excessive local stress. During the extraction process, the core sample may break at the edges and corners, lose particles, or deform, effectively maintaining its integrity and ensuring the accuracy of subsequent test results. It eliminates the need for laborious and potentially damaging methods such as knocking or twisting, reducing time and labor costs.

[0016] 2. The present invention has a freely movable and fixed structure, which allows the core-taking device to be flexibly moved between different working locations and can be stably fixed on the ground to ensure that the device will not shake or shift during the core-taking process, making the drilling process more stable. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of a road surface core sampling device provided by this utility model;

[0018] Figure 2 A schematic diagram of the bottom structure of a road surface core sampling device provided by this utility model;

[0019] Figure 3 A cross-sectional structural schematic diagram of a road surface core sampling device provided by this utility model;

[0020] Figure 4 A cross-sectional structural schematic diagram of a road surface core sampling device provided by this utility model;

[0021] Figure 5 This utility model provides a road surface core sampling device. Figure 3 A magnified structural diagram of A in the diagram.

[0022] Legend:

[0023] 1. Main housing; 2. Drill barrel; 3. Clamping plate; 4. Limiting plate; 5. Limiting groove; 6. Rotating rod; 7. Synchronizing rod; 8. First connecting rod; 9. Worm gear; 10. Worm; 11. Hexagonal socket block; 12. Motor; 13. Lifting plate; 14. Mounting sleeve; 15. Limiting rod; 16. Fixing frame; 17. Internal threaded sleeve; 18. Threaded rod; 19. Handwheel; 20. Pressure shell; 21. Power rod; 22. Driven crank; 23. Second connecting rod; 24. Shaft block; 25. Pressure plate; 26. Roller; 27. Positioning rod; 28. Driving crank; 29. ​​Hydraulic rod. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1 to 5 This utility model provides a technical solution: a road surface core sampling device, including a main housing 1, a drill cylinder 2 fixedly connected to the bottom of the main housing 1, two clamping plates 3 movably embedded on the inner surface of the drill cylinder 2, a limiting plate 4 fixedly connected to the top of the clamping plates 3, two limiting grooves 5 opened at the bottom of the main housing 1, the outer surface of the limiting plate 4 movably embedded in the limiting grooves 5, a rotating rod 6 rotatably connected inside the main housing 1, two synchronizing rods 7 fixedly connected to the outer surface of the rotating rod 6, a first connecting rod 8 rotatably connected to the end of the synchronizing rod 7 away from the rotating rod 6, and the end of the first connecting rod 8 away from the synchronizing rod 7 rotatably connected to the top of the limiting plate 4, a worm gear 9 fixedly sleeved on the outer surface of the rotating rod 6, and a worm 10 meshing with the outer surface of the worm gear 9. Under the meshing action of the worm 10 and the worm gear 9, the rotating rod 6 will be driven to rotate, and the synchronizing rod 7 rotating with the rotating rod 6 will drive one end of the first connecting rod 8.

[0026] like Figures 1 to 5As shown, one end of the worm gear 10 is rotatably connected to the inner surface of the main housing 1, and the other end of the worm gear 10 is fixedly connected to an internal hexagon block 11. The outer surface of the internal hexagon block 11 is rotatably connected to the outer side of the main housing 1, and the worm gear 10 can be driven to rotate inside the main housing 1 through the internal hexagon block 11.

[0027] like Figures 1 to 5 As shown, a motor 12 is fixedly connected to the top of the main housing 1, and a lifting plate 13 is rotatably connected to the outer surface of the output rod of the motor 12. An mounting sleeve 14 is fixedly sleeved on the outer surface of the motor 12, and the bottom of the mounting sleeve 14 is fixedly connected to the top of the lifting plate 13. When the motor 12 is powered on, it will drive the main housing 1 and the drill barrel 2 to rotate.

[0028] like Figures 1 to 5 As shown, two limiting rods 15 are movably embedded inside the lifting plate 13. The two ends of the two limiting rods 15 are fixedly connected to the fixing frame 16. An internal threaded sleeve 17 is fixedly connected to one side of the lifting plate 13. A threaded rod 18 is threadedly connected to the inner surface of the internal threaded sleeve 17. The outer surface of the threaded rod 18 is rotatably connected to the outer surface of the fixing frame 16 and extends out one end. A handwheel 19 is fixedly connected to the extended end of the threaded rod 18. Rotating the thread will drive the drill barrel 2 and the main housing 1 to rotate and descend along the axis of the limiting rod 15 and drill into the ground.

[0029] like Figures 1 to 5 As shown, a pressure shell 20 is fixedly connected to the bottom of the fixed frame 16. A power rod 21 is rotatably connected inside the pressure shell 20 and extends out one end. Two driven cranks 22 are fixedly sleeved on the outer surface of the power rod 21. The power rod 21 can rotate inside the pressure shell 20.

[0030] like Figures 1 to 5 As shown, the driven crank 22 is rotatably connected to a second connecting rod 23 at the end away from the power rod 21. The second connecting rod 23 is rotatably connected to a shaft block 24 at the end away from the driven crank 22. The bottom of the two shaft blocks 24 is fixedly connected to a pressure plate 25. The bottom of the pressure plate 25 is rotatably connected to multiple rollers 26. The other end of the second connecting rod 23 will pull the pressure plate 25 through the shaft block 24.

[0031] like Figures 1 to 5 As shown, multiple positioning rods 27 are movably embedded inside the pressure plate 25. The two ends of the multiple positioning rods 27 are fixedly connected to the inner surface of the pressure shell 20. The pressure plate 25 and the roller 26 rise along the axial direction of the positioning rods 27. The roller 26 no longer contacts the ground, and the pressure shell 20 contacts the ground, thus completing the fixation of the device.

[0032] like Figures 1 to 5As shown, one end of the power rod 21 is fixedly connected to the drive crank 28, and the end of the drive crank 28 away from the power rod 21 is rotatably connected to the hydraulic rod 29. The end of the hydraulic rod 29 away from the drive crank 28 is rotatably connected to one side of the pressure shell 20. The hydraulic rod 29 will push one end of the drive crank 28, causing the power rod 21 to rotate inside the pressure shell 20.

[0033] Working principle: First, the device is moved to the target position by roller 26. Then, the hydraulic rod 29 performs work, pushing one end of the drive crank 28, causing the power rod 21 to rotate inside the pressure shell 20. The driven crank 22, which rotates with the power rod 21, drives one end of the second connecting rod 23. The other end of the second connecting rod 23 pulls the pressure plate 25 through the shaft block 24, causing the pressure plate 25 and roller 26 to rise along the axis of the positioning rod 27. Roller 26 no longer contacts the ground, and the pressure shell 20 contacts the ground, thus completing the device fixation. Then, the external power supply of motor 12 is turned on. Motor 12 is fixed above the lifting plate 13 by mounting sleeve 14. After motor 12 is powered on, it drives the main housing 1 and drill barrel 2 to rotate, and at the same time, the threaded rod 18 is driven by handwheel 19. Rotating inside the fixed frame 16, the rotating thread will drive the internal thread sleeve 17. The lifting plate 13 can only move along the axis of the limiting rod 15. Therefore, the rotating thread will drive the drill barrel 2 and the main housing 1 to rotate and descend along the axis of the limiting rod 15 and drill into the ground. When the drill barrel 2 drills into the target depth, it can drive the worm gear 10 to rotate inside the main housing 1 through the internal hexagon block 11. Under the meshing action of the worm gear 10 and the worm wheel 9, the rotating rod 6 will be driven to rotate. The synchronous rod 7 that rotates with the rotating rod 6 will drive one end of the first connecting rod 8. The other end of the first connecting rod 8 will pull the limiting plate 4, so that the limiting plate 4 and the clamping plate 3 move closer to each other along the slotting direction of the limiting groove 5 and clamp and fix the internal core. Then, the core can be taken out by rotating the handwheel 19 in the opposite direction.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A road coring device comprising a main housing (1), characterized in that, The bottom of the main housing (1) is fixedly connected to a drill barrel (2). Two clamping plates (3) are movably embedded in the inner surface of the drill barrel (2). A limiting plate (4) is fixedly connected to the top of the clamping plate (3). Two limiting grooves (5) are opened at the bottom of the main housing (1). The outer surface of the limiting plate (4) is movably embedded in the limiting groove (5). A rotating rod (6) is rotatably connected inside the main housing (1). Two synchronizing rods (7) are fixedly connected to the outer surface of the rotating rod (6). A first connecting rod (8) is rotatably connected to the end of the synchronizing rod (7) away from the rotating rod (6). The end of the first connecting rod (8) away from the synchronizing rod (7) is rotatably connected to the top of the limiting plate (4). A worm gear (9) is fixedly sleeved on the outer surface of the rotating rod (6). A worm (10) is meshed with the outer surface of the worm gear (9).

2. A pavement coring device according to claim 1, wherein: One end of the worm gear (10) is rotatably connected to the inner surface of the main housing (1), and the other end of the worm gear (10) is fixedly connected to an internal hexagon block (11). The outer surface of the internal hexagon block (11) is rotatably connected to the outer side of the main housing (1).

3. A pavement coring device according to claim 2, wherein: A motor (12) is fixedly connected to the top of the main housing (1). A lifting plate (13) is rotatably connected to the outer surface of the output rod of the motor (12). An installation sleeve (14) is fixedly sleeved on the outer surface of the motor (12). The bottom of the installation sleeve (14) is fixedly connected to the top of the lifting plate (13).

4. A pavement coring device according to claim 3, wherein: The lifting plate (13) is internally fitted with two limiting rods (15), and the two ends of the two limiting rods (15) are fixedly connected to a fixing frame (16). An internal threaded sleeve (17) is fixedly connected to one side of the lifting plate (13). A threaded rod (18) is threadedly connected to the inner surface of the internal threaded sleeve (17). The outer surface of the threaded rod (18) is rotatably connected to the outer surface of the fixing frame (16) and extends out one end. A handwheel (19) is fixedly connected to the extended end of the threaded rod (18).

5. A pavement coring device according to claim 4, wherein: The bottom of the fixed frame (16) is fixedly connected to a pressure shell (20), and the inside of the pressure shell (20) is rotatably connected to a power rod (21) which extends out one end. Two driven cranks (22) are fixedly sleeved on the outer surface of the power rod (21).

6. A pavement coring device according to claim 5, wherein: The driven crank (22) is rotatably connected to a second connecting rod (23) at the end away from the power rod (21). The second connecting rod (23) is rotatably connected to a shaft block (24) at the end away from the driven crank (22). The bottom of the two shaft blocks (24) is fixedly connected to a pressure plate (25). The bottom of the pressure plate (25) is rotatably connected to multiple rollers (26).

7. A road surface coring device according to claim 6, characterized in that: Multiple positioning rods (27) are movably embedded inside the pressure plate (25), and the two ends of the multiple positioning rods (27) are fixedly connected to the inner surface of the pressure shell (20).

8. A pavement coring device according to claim 7, wherein: One end of the power rod (21) is fixedly connected to the active crank (28), and the end of the active crank (28) away from the power rod (21) is rotatably connected to the hydraulic rod (29). The end of the hydraulic rod (29) away from the active crank (28) is rotatably connected to one side of the pressure shell (20).

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