Shallow-layer flat-bottom non-coring bit

Abstract

The utility model relates to the field of pavement core drilling equipment accessories, in particular to a shallow flat bottom non-coring drill bit which comprises a connecting shaft and a drill bit, one end of the connecting shaft is detachably connected with the drill bit, the other end of the connecting shaft is detachably connected with pavement core drilling equipment, the drill bit comprises a spoke axis, spokes and a hole core outer ring, and the top of the spoke axis is detachably connected with the connecting shaft. First drilling teeth are arranged at the bottom of the spoke axis, five spokes are fixedly connected to the outer wall of the spoke axis in the circumferential direction, second drilling teeth with the curvature and the thickness changing according to the radiation radius are arranged at the bottoms of the spokes, the outer ends of the spokes are jointly and fixedly connected with a hole core outer ring, and third drilling teeth are distributed on the lower portion of the hole core outer ring at intervals in the circumferential direction. The spoke axis, the spoke and the lower part of the tooth surface of the drilling tooth on the hole core outer ring are positioned on the same horizontal plane; regular pit holes can be drilled in the surface of the existing structure in parallel through the connecting shaft and the drill bit, so that sinking type installation of traffic signs or road signs is facilitated, and the flatness of the installation portion on the surface of the existing structure is improved.

Description

Technical Field

[0001] The utility model relates to the field of road core drilling equipment accessories, in particular to a shallow flat bottom non-coring drill bit used for the sinking installation of existing road traffic signs or road markings. Background Art

[0002] Public transportation signs are an important means for traffic management departments to provide road information to drivers. There are four main types of traffic signs: instruction signs, warning signs, prohibition signs and direction signs. The purpose of traffic signs is to enable drivers to drive better, reduce the occurrence of traffic accidents and ensure smooth roads. With signs, we can be reminded to pay special attention to certain sections of the road, and play a role in guiding directions and safety warnings.

[0003] The traditional installation mode is to place, paint or paste various signs on existing structures. During use, they are easily damaged by natural climate, tire wear, snow removal and road cleaning, which affects the service life of traffic signs or road signs and reduces the ability of traffic signs or road signs to resist the influence of natural climate, vehicle wear, snow removal and road cleaning. Utility Model Content

[0004] The utility model aims to provide a shallow flat-bottom non-coring drill bit to solve the problem proposed in the above-mentioned background technology of enhancing traffic signs or road markings to resist damage caused by natural climate, vehicle wear and tear, and road snow removal and cleaning, so as to facilitate sinking installation.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A shallow flat-bottom non-coring drill bit comprises a connecting shaft and a drill bit, wherein one end of the connecting shaft is detachably connected to the drill bit, and the other end is detachably connected to a road surface core drilling device, the drill bit comprises a spoke axis, spokes and a hole core outer ring, the top of the spoke axis is detachably connected to the connecting shaft, a first drill tooth is provided at the bottom of the spoke axis, five spokes are fixedly connected to the outer wall of the spoke axis along the circumferential direction, a second drill tooth is provided at the bottom of the spoke, the outer ends of the spokes are commonly fixedly connected to the hole core outer ring, and a third drill tooth is distributed at intervals along the circumferential direction on the lower part of the hole core outer ring, and the lower parts of the drill tooth surfaces on the spoke axis, the spokes and the hole core outer ring are located in the same horizontal plane.

[0007] Preferably, a cavity is provided in the bottom of the spoke axis, the bottom of the cavity is sealed by welding with a steel plate, three drill teeth 1 are welded in a trident shape on the outside of the sealed bottom plate cavity, a water outlet hole 1 is provided on the sealing bottom plate in front of the drill teeth 1, and five water outlet holes 2 are evenly provided on the outer wall of the spoke axis along the circumferential direction, and the water outlet holes 2 are connected to the cavity.

[0008] Preferably, the spokes are hollow thick-walled square steel pipes, and the spokes are connected to the second water outlet hole.

[0009] Preferably, the connecting shaft is a hollow steel tube, and a hexagonal platform is provided on the connecting shaft located above the spoke axis.

[0010] Preferably, the curvature and thickness of the drill tooth 2 vary according to the radiation radius, and a water spray hole is correspondingly opened below each drill tooth on the spoke facing rotating surface, the diameter of the water spray hole increases along the divergent direction of the spoke, and the water spray hole is connected to the spoke.

[0011] Preferably, overflow holes are provided at the spoke ends where the outer ring of the core is connected to the spokes.

[0012] Preferably, the spoke axis is at 90° to the spoke.

[0013] Preferably, the spoke axle and the hole core outer ring are made of seamless steel pipes with different diameters.

[0014] Preferably, the drill tooth one is a straight water drill tooth, the drill tooth two is a water drill Great Wall tooth, and the drill tooth three is a thin-wall water drill tooth.

[0015] Preferably, the connecting shaft is threadedly connected to the drill bit.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model discloses a shallow flat bottom non-coring drill bit, which is composed of a connecting shaft and a drill bit. The drill bit includes a spoke axis, spokes and a hole core outer ring. Regular pits can be drilled in parallel on the surface of an existing structure to facilitate the sunken installation of traffic signs or road signs, thereby improving the flatness of the installation part on the surface of the existing structure, solving the problem of the sunken installation of thin and small traffic signs or road signs on the existing road, and making the installed truncated cone-shaped traffic signs or road signs flush with the top surface of the existing road.

[0018] The water flow channel connecting the shaft and the drill bit can spray cooling water to cool the drill bit when drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0021] Figure 3 for Figure 2 A partial enlarged view;

[0022] Figure 4 This is a schematic diagram of the front view structure of the utility model;

[0023] Figure 5 for Figure 4 AA section structure diagram;

[0024] Figure 6 This is a schematic diagram of the connecting shaft and spoke axis structure of the utility model;

[0025] Figure 7 It is a schematic diagram of the utility model structure from a top view.

[0026] Figure numbers: 1. Connecting shaft; 2. Drill bit; 21. Outer ring of hole core; 212. Drill tooth three; 22. Spoke; 221. Drill tooth two; 222. Water spray hole; 223. Overflow hole; 23. Spoke axis; 231. Water outlet hole two; 232. Cavity; 233. Drill tooth one; 234. Water outlet hole one; 3. Hexagonal table. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] Now combined with the attached Figure 1-7 As shown, a specific technical solution for providing a shallow flat bottom non-coring drill bit is as follows:

[0029] The shallow flat-bottom non-coring drill bit comprises a connecting shaft 1 and a drill bit 2, wherein the connecting shaft 1 is a hollow steel pipe, one end of the connecting shaft 1 can be connected to a core drilling machine, and the other end of the connecting shaft 1 is threadedly connected to the drill bit 2, and the drill bit 2 comprises a spoke axis 23, spokes 22 and a hole core outer ring 21, the top of the spoke axis 23 is detachably connected to the connecting shaft 1, a drill tooth 1 233 is arranged at the bottom of the spoke axis 23, five spokes 22 are fixedly connected to the outer wall of the spoke axis 23 along the circumferential direction, a drill tooth 221 is arranged at the bottom of the spoke 22, the outer ends of the spokes 22 are commonly fixedly connected to the hole core outer ring 21, and drill teeth 3 212 are distributed at intervals along the circumferential direction at the lower part of the hole core outer ring 21, and the lower parts of the drill tooth surfaces on the spoke axis 23, the spokes 22 and the hole core outer ring 21 are located in the same horizontal plane.

[0030] Example

[0031] The lower part of the connecting shaft 1 is threadedly connected with a spoke axis 23, and a drill tooth 233 is arranged at the bottom of the spoke axis 23, and the drill tooth 233 is a straight water drill tooth. Five spokes 22 are fixedly connected to the outer wall of the spoke axis 23 along the circumferential direction, and the spoke axis 23 is 90 degrees with the spoke 22. The bottom of the spoke 22 is provided with a drill tooth 221 whose curvature and thickness vary according to the radiation radius, and the drill tooth 221 is a water drill Great Wall tooth. A water spray hole 222 is correspondingly opened above each drill tooth 221 on the rotating surface of the spoke 22, and the diameter of the water spray hole 222 diverges along the spoke 22. The outer ends of the spokes 22 are fixedly connected with the hole core outer ring 21. The spoke ends at the connection between the hole core outer ring 21 and each spoke 22 are provided with overflow holes 223. The lower part of the hole core outer ring 21 is evenly distributed with drill teeth 3 212 along the circumferential direction. The drill teeth 3 212 are thin-walled water drill teeth. The lower parts of the tooth surfaces of the drill teeth 1 233, the drill teeth 221 and the drill teeth 3 212 are located in the same horizontal plane. Regular pits can be drilled in parallel on the surface of the existing structure, which is convenient for the sunken installation of traffic signs or road signs and improves the flatness of the installation part on the surface of the existing structure.

[0032] It should be noted that the spoke axis 23 is made of seamless steel pipe, and a cavity 232 is arranged inside the spoke axis 23. The bottom of the cavity 232 is sealed by welding with a steel plate, and three drill teeth 233 are welded in a trident shape on the outside of the sealed bottom plate cavity. Water outlet holes 234 are provided on the sealing bottom plate in front of the drill teeth 233. Five water outlet holes 231 are evenly arranged on the outer wall of the spoke axis 23 along the circumferential direction. The water outlet holes 231 are connected with the cavity 232. The spokes 22 are hollow thick-walled square steel pipes to facilitate the welding of drill teeth at the bottom of the spokes 22, and the spokes 22 are connected with the water outlet holes 231.

[0033] The connecting shaft 1 is a hollow steel tube. A hexagonal platform 3 is provided on the connecting shaft 1 located above the spoke axis 23 . The hexagonal platform 3 is used to increase the friction between the disassembly and assembly tool and the connecting shaft 1 .

[0034] When in use, a drill bit 2 of a certain diameter is selected according to the size of the hole to be drilled, and the drill bit 2 is connected to the core drilling machine through the threads at both ends of the connecting shaft 1 through the connecting shaft 1. At the same time, the connecting shaft 1 is connected to an external water source. During the drilling process, external water enters the cavity 232 through the connecting shaft 1, and then enters the spoke 22 through the second water outlet hole 231, and is sprayed out through the water spray hole 222. The overflow hole 223 at the connection between the outer ring 21 of the core and the end of the spoke 22 can allow part of the water flow to spray out from the end of the spoke 22, and the water flow can spray the drill bit 2 to cool it down during drilling.

[0035] When drilling, the straight drill teeth, the Great Wall drill teeth and the thin-wall drill teeth are used to break up the material to make the bottom of the hole flat and smooth. During the rotation of the drill bit 2, the spokes 22 and the spoke axis 23 play a role in milling the material in the drill hole without coring.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A shallow flat bottom non-coring drill bit, characterized by: The invention comprises a connecting shaft (1) and a drill bit (2), wherein one end of the connecting shaft (1) is detachably connected to the drill bit (2), and the other end is detachably connected to a road surface core drilling device, wherein the drill bit (2) comprises a spoke axis (23), spokes (22) and a hole core outer ring (21), wherein the top of the spoke axis (23) is detachably connected to the connecting shaft (1), a first drill tooth (233) is arranged at the bottom of the spoke axis (23), five spokes (22) are fixedly connected to the outer wall of the spoke axis (23) along the circumferential direction, a second drill tooth (221) is arranged at the bottom of the spoke (22), the outer ends of the spokes (22) are fixedly connected to the hole core outer ring (21), and a third drill tooth (212) is distributed at intervals along the circumferential direction at the bottom of the hole core outer ring (21), and the lower parts of the drill tooth surfaces on the spoke axis (23), the spokes (22) and the hole core outer ring (21) are located in the same horizontal plane.

2. The shallow flat bottom non-coring drill bit according to claim 1, characterized in that: A cavity (232) is arranged inside the spoke axis (23), the bottom of the cavity (232) is sealed by welding with a steel plate, three drill teeth (233) are welded in a trident shape on the outer side of the sealed bottom plate cavity, water outlet holes (234) are provided on the sealed bottom plate in front of the drill teeth (233), and five water outlet holes (231) are evenly provided on the outer wall of the spoke axis (23) along the circumferential direction, and the water outlet holes (231) are connected to the cavity (232).

3. The shallow flat bottom non-coring drill bit according to claim 2, characterized in that: The spoke (22) is a hollow thick-walled square steel pipe, and the spoke (22) is connected to the second water outlet hole (231).

4. The shallow flat bottom non-coring drill bit according to claim 3, characterized in that: The connecting shaft (1) is a hollow steel pipe, and a hexagonal platform (3) is arranged on the upper part of the connection between the connecting shaft (1) and the spoke axis (23).

5. The shallow flat bottom non-coring drill bit according to claim 1, characterized in that: The curvature and thickness of the second drill tooth (221) vary according to the radiation radius. A water spray hole (222) is correspondingly opened below each drill tooth on the rotating surface of the spoke (22). The diameter of the water spray hole (222) increases along the divergent direction of the spoke (22). The water spray hole (222) is connected to the spoke (22).

6. The shallow flat bottom non-coring drill bit according to claim 5, characterized in that: An overflow hole (223) is provided at the spoke end where the core outer ring (21) is connected to the spoke (22).

7. The shallow flat bottom non-coring drill bit according to claim 2, characterized in that: The spoke axis (23) and the spoke (22) are at 90 degrees.

8. The shallow flat bottom non-coring drill bit according to claim 7, characterized in that: The spoke axle core (23) and the hole core outer ring (21) are made of seamless steel pipes with different diameters.

9. The shallow flat bottom non-coring drill bit according to claim 1, characterized in that: The drill tooth 1 (233) is a straight water drill tooth, the drill tooth 2 (221) is a water drill Great Wall tooth, and the drill tooth 3 (212) is a thin-wall water drill tooth.

10. The shallow flat bottom non-coring drill bit according to claim 1, characterized in that: The connecting shaft (1) is threadedly connected to the drill bit (2).

Images