Coring mechanism for road detection
By fitting rectangular blocks and frames onto the cutter head, and installing inclined plates and thickened rings, the reaction force is dispersed, solving the problem of weld breakage at the welded joint between the cutter head and the connecting shaft, thus improving the safety and stability of road inspection core sampling.
Patent Information
- Application Number
- CN202520412543.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-11
AI Technical Summary
In existing road inspection core sampling equipment, the welded joint between the tube cutter and the connecting shaft is prone to breakage, resulting in poor stability and affecting the safety of the inspection.
Design a core sampling mechanism for road inspection. By welding a connecting shaft onto the core cutter, and fitting a rectangular block and a rectangular frame onto the connecting shaft, installing an inclined plate and a thickened ring, the limiting structure disperses the reaction force, reducing the load on the welded part. An annular groove is opened on the thickened ring to facilitate the removal of rusted screws. A sleeve and guide rod structure is used to prevent the core cutter from deforming.
It effectively reduces the load on the welded joint between the core cutter and the connecting shaft, prevents weld breakage, improves the safety of core removal operations, and simplifies component disassembly and protects the core cutter from damage.
Smart Images
Figure CN223897075U_ABST
Abstract
Description
Technical Field
[0001] This utility model is a core sampling mechanism for road inspection, belonging to the field of road inspection. Background Technology
[0002] Before a newly constructed road is put into use, the quality of the project is confirmed by testing several core sampling points. The purpose of road core sampling is to understand the thickness, density, uniformity, and integrity of each layer of the road surface. Electric or hydraulically driven core sampling machines are commonly used for road core sampling. These machines include a core cutter, with a connecting shaft welded to its upper end for connection to the electric or hydraulic drive mechanism. During core sampling, the core cutter is subjected to the reaction force of the road surface. However, the connection range between the connecting shaft and the core cutter is relatively small, resulting in a large reaction force per unit area at the connection point. This can easily lead to weld breakage at the welded joint, resulting in poor stability and affecting the safety of road core sampling. Therefore, it is necessary to design a road core sampling mechanism that reduces the load on the welded joint between the connecting shaft and the core cutter. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a core sampling mechanism for road inspection, thereby solving the problems mentioned in the background section. This invention reduces the load on the welded joint between the connecting shaft and the cutter, prevents weld breakage at the connection between the connecting shaft and the cutter, and improves the safety of core sampling for road inspection.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a core sampling mechanism for road inspection, including a cylindrical blade, a connecting shaft welded to the middle of the upper surface of the cylindrical blade, multiple blade teeth evenly welded to the bottom of the cylindrical blade, a rectangular block sleeved on the connecting shaft and fixed to the connecting shaft, a rectangular frame sleeved on the rectangular block, a thickened ring sleeved on the end of the cylindrical blade near the connecting shaft and fixed to the cylindrical blade, and inclined plates installed on the four sides of the rectangular frame, the end of the inclined plate away from the rectangular frame being connected and fixed to the thickened ring by a fastener formed by a screw and a first nut.
[0005] Furthermore, the inclined plate has two first through holes at one end near the thickened ring, and the thickened ring has two second through holes aligned with the first through holes in the area covered by the inclined plate. A screw is inserted into the channel formed by the first and second through holes, and a first nut is threaded to the lower end of the screw.
[0006] Furthermore, an annular groove is provided on the annular side of the thickened ring, the second through hole is divided into two by the annular groove, and the part of the screw located in the annular groove is exposed.
[0007] Furthermore, a square head is fixedly connected to the upper end of the connecting shaft. The square head and the connecting shaft are integrally formed, and a shaft hole is opened on one side of the square head.
[0008] Furthermore, two symmetrically arranged ear plates are connected and fixed to one end of the inclined plate near the rectangular frame, and the ear plates are connected and fixed to the rectangular frame.
[0009] Furthermore, a protective sleeve is fitted onto the tube cutter and slides in contact with the tube cutter. A lug is fixedly connected to the upper end of the protective sleeve. A guide rod is installed on the upper surface of the lug. An external thread is machined on the upper end of the guide rod. A guide hole that mates with the guide rod is opened at the edge of the upper surface of the thickened ring. The upper end of the guide rod passes through the guide hole and is threadedly connected to a second nut.
[0010] Furthermore, the upper surface of the tube cutter is uniformly provided with multiple vent holes, which are connected to the internal space of the tube cutter.
[0011] The beneficial effects of this utility model are:
[0012] 1. After the rectangular frame is placed on the rectangular block, the relative position of the rectangular frame and the connecting shaft remains unchanged. During the core sampling process, part of the reaction force of the tube cutter will act on the connection between the inclined plate and the thickened ring and the limiting structure formed by the rectangular frame and the rectangular block, reducing the load on the welding part between the connecting shaft and the tube cutter, preventing the weld from breaking at the connection part between the connecting shaft and the tube cutter, and improving the safety of core sampling for road inspection.
[0013] 2. A ring groove is machined on the thickened ring so that after the screw passes through the thickened ring, the screw in the ring groove is exposed. When the screw and the first nut cannot be separated due to corrosion, the screw can be cut off by the ring groove to separate the fastener formed by the corroded screw and the first nut. This allows the screw to be disassembled without damaging the thickened ring, inclined plate and other components.
[0014] 3. During the core extraction process, the sheath will move upward due to the obstruction of the ground. The sheath will then drive the guide rod to slide along the guide hole, so that the sheath does not affect the core extraction operation of the tube cutter. When the sample inside the tube cutter is removed by tapping, the hammer will strike the sheath. Thus, under the protection of the sheath, the hammer does not directly act on the tube cutter, preventing the tube cutter from being deformed or damaged by direct hammering. Attached Figure Description
[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0016] Figure 1 This is a schematic diagram of the structure of a core sampling mechanism for road inspection according to the present invention;
[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0018] Figure 3 This is an assembly diagram of the thickened ring, connecting shaft, and cylindrical cutter in a core sampling mechanism for road inspection according to this utility model;
[0019] Figure 4 This is a schematic diagram of the assembly of the connecting plate and the rectangular frame in a core sampling mechanism for road inspection according to this utility model;
[0020] In the diagram: 1-Cylinder cutter, 2-Sheath, 3-Cutter teeth, 4-Lug, 5-Guide rod, 6-Thickened ring, 7-Rectangular block, 8-Connecting shaft, 9-Square head, 10-Rectangular frame, 11-Slanted plate, 12-Annular groove, 13-Ventilation hole, 14-Screw, 15-First nut, 16-Second nut, 17-First through hole, 18-Guide hole, 19-Second through hole, 20-Ear plate. Detailed Implementation
[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0022] Please see Figure 1 , Figure 3 and Figure 4 This utility model provides a technical solution: a core sampling mechanism for road inspection, including a cylindrical blade 1. Multiple ventilation holes 13 are evenly distributed on the upper surface of the cylindrical blade 1, communicating with the internal space of the cylindrical blade 1. A connecting shaft 8 is welded to the middle of the upper surface of the cylindrical blade 1. Multiple cutting teeth 3 are evenly welded to the bottom of the cylindrical blade 1. A square head 9 is fixedly connected to the upper end of the connecting shaft 8. The square head 9 and the connecting shaft 8 are integrally formed. A shaft hole is opened on one side of the square head 9. A rectangular block 7 is fitted onto the connecting shaft 8 and fixedly connected to it. A rectangular frame 10 is fitted onto the rectangular block 7. A thickened ring 6 is fitted onto the end of the cylindrical blade 1 near the connecting shaft 8 and fixedly connected to it. Inclined plates 11 are installed on all four sides of the rectangular frame 10. Two symmetrically arranged ear plates 20 are fixedly connected to the end of the inclined plate 11 near the rectangular frame 10. The ear plates 20 are fixedly connected to the rectangular frame 10, increasing the connection range between the inclined plate 11 and the rectangular frame 10.
[0023] See Figures 1-4Two first through holes 17 are provided at one end of the inclined plate 11 near the thickened ring 6. Two second through holes 19 are provided in the area of the thickened ring 6 covered by the inclined plate 11, which are aligned with the first through holes 17. A screw 14 is inserted into the channel formed by the first through holes 17 and the second through holes 19. A first nut 15 is threaded to the lower end of the screw 14. After the rectangular frame 10 is fitted onto the rectangular block 7, the relative position of the rectangular frame 10 and the connecting shaft 8 remains unchanged. During the core extraction process, part of the reaction force of the tube cutter 1 will act on the connection between the inclined plate 11 and the thickened ring 6 and the limiting structure formed by the rectangular frame 10 and the rectangular block 7, reducing the load on the welded part between the connecting shaft 8 and the tube cutter 1, preventing the weld from breaking at the connection between the connecting shaft 8 and the tube cutter 1, and improving the safety of core extraction for road inspection.
[0024] See Figures 1-3 After the annular groove 12 is opened on the annular side of the thickened ring 6, the second through hole 19 is divided into two by the annular groove 12, so that after the screw 14 passes through the thickened ring 6, the screw 14 in the annular groove 12 is exposed. When the screw 14 and the first nut 15 cannot be separated due to corrosion, the screw 14 can be cut off by the annular groove 12 to separate the fastener formed by the corroded screw 14 and the first nut 15, so as to disassemble the screw 14 without damaging the thickened ring 6, the inclined plate 11 and other components.
[0025] See Figures 1-3 The core cutter 1 is fitted with a sleeve 2 that slides in contact with it. The upper end of the sleeve 2 is connected and fixed with a lug 4. A guide rod 5 is installed on the upper surface of the lug 4. The upper end of the guide rod 5 is machined with an external thread. A guide hole 18 that matches the guide rod 5 is opened at the edge of the upper surface of the thickened ring 6. The upper end of the guide rod 5 passes through the guide hole 18 and is threadedly connected with a second nut 16. During the core removal process of the core cutter 1, the sleeve 2 will move upward due to the obstruction of the ground. Then, the sleeve 2 will drive the guide rod 5 to slide along the guide hole 18. Thus, the sleeve 2 does not affect the core removal operation of the core cutter 1. When the sample inside the core cutter 1 is removed by tapping, the hammer will strike the sleeve 2. Thus, under the protection of the sleeve 2, the hammer does not directly act on the core cutter 1, preventing the core cutter 1 from being deformed and damaged by direct hammering.
[0026] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A core sampling mechanism for road inspection, comprising a cylindrical cutter (1), characterized in that: A connecting shaft (8) is welded to the middle of the upper surface of the tube cutter (1). Multiple cutting teeth (3) are evenly welded to the bottom of the tube cutter (1). A rectangular block (7) is fitted on the connecting shaft (8) and fixed to it. A rectangular frame (10) is fitted on the rectangular block (7). A thickened ring (6) is fitted on the end of the tube cutter (1) near the connecting shaft (8) and fixed to it. Inclined plates (11) are installed on the four sides of the rectangular frame (10). The end of the inclined plate (11) away from the rectangular frame (10) is connected and fixed to the thickened ring (6) by a fastener formed by a screw (14) and a first nut (15).
2. The core sampling mechanism for road inspection according to claim 1, characterized in that: Two first through holes (17) are provided at one end of the inclined plate (11) near the thickened ring (6). Two second through holes (19) are provided in the area of the thickened ring (6) covered by the inclined plate (11) and aligned with the first through holes (17). A screw (14) is inserted in the channel formed by the first through hole (17) and the second through hole (19). A first nut (15) is threaded to the lower end of the screw (14).
3. The core sampling mechanism for road inspection according to claim 2, characterized in that: The thickened ring (6) has an annular groove (12) on its annular side. The second through hole (19) is divided into two by the annular groove (12). The part of the screw (14) inside the annular groove (12) is exposed.
4. The core sampling mechanism for road inspection according to claim 1, characterized in that: A square head (9) is fixedly connected to the upper end of the connecting shaft (8). The square head (9) and the connecting shaft (8) are integrally formed. A shaft hole is opened on one side of the square head (9).
5. A core sampling mechanism for road inspection according to claim 1, characterized in that: The inclined plate (11) is connected and fixed to two symmetrically arranged ear plates (20) at one end near the rectangular frame (10), and the ear plates (20) are connected and fixed to the rectangular frame (10).
6. A core sampling mechanism for road inspection according to claim 1, characterized in that: The sleeve (2) is fitted on the tube cutter (1) and slides in contact with the tube cutter (1). The upper end of the sleeve (2) is connected and fixed with a lug (4). A guide rod (5) is installed on the upper surface of the lug (4). The upper end of the guide rod (5) is machined with an external thread. A guide hole (18) is opened at the edge of the upper surface of the thickened ring (6) to cooperate with the guide rod (5). The upper end of the guide rod (5) passes through the guide hole (18) and is threaded with a second nut (16).
7. A core sampling mechanism for road inspection according to claim 1, characterized in that: The upper surface of the tube cutter (1) is provided with a plurality of ventilation holes (13), which are connected to the internal space of the tube cutter (1).