Five-pit electric hammer drill bit

Abstract

The utility model relates to the technical field of five-pit electric hammer drill bits, and discloses a five-pit electric hammer drill bit which comprises a drill rod, the top end of the drill rod is fixedly connected with a fixing rod, a first flow guide groove is formed in the outer wall of the drill rod, and a second flow guide groove is formed in the position, close to the edge, of the outer wall of the drill rod. A liquid drainage hole is formed in the inner wall of the first flow guide groove, a liquid inlet hole is formed in the inner wall of the second flow guide groove, cooling grooves are formed in the bottoms of the inner walls of the liquid drainage hole and the liquid inlet hole, a plurality of annular grooves are formed in the inner walls of the cooling grooves, and a plurality of positioning rings are fixedly connected to the upper middle side of the outer wall of the drill rod. According to the cooling device, when the drill rod rotates, the liquid inlet sleeve is kept relatively static between the positioning rings, meanwhile, cooling liquid is drained into the second flow guide groove through the liquid groove and is discharged through the liquid groove in the other side, the purpose of rapidly cooling the drill bit in a circulating mode is achieved, the working efficiency is improved, and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of five-hole electric hammer drill bit technology, and in particular to a five-hole electric hammer drill bit. Background Technology

[0002] A five-flute hammer drill bit is a drill bit designed specifically for heavy-duty hammer drills. It refers to a drill bit with five flutes on the shank, including three keyways and two ball joints. Because its force-bearing structure is more reasonable and can better transmit force, it is suitable for heavy-duty hammer drills with high torque and high power. Compared with a four-flute hammer drill bit, it has many advantages.

[0003] Compared to four-hole hammer drill bits, five-hole hammer drill bits have a five-hole structure that can more effectively transmit the power of the hammer to the drill bit, improving the drill bit's working efficiency. At the same time, in heavy-duty work, five-hole drill bits are more stable and less prone to slippage than four-hole drill bits. Furthermore, due to their more robust structure, five-hole drill bits are more durable than four-hole drill bits.

[0004] When a five-hole hammer drill bit is used for drilling for a long time, its surface temperature will rise rapidly due to contact friction. Long-term high-temperature use will cause it to deform and crack. Therefore, existing five-hole hammer drill bits are mostly cooled by spraying coolant. However, the coolant cannot be recycled and the cooling efficiency is reduced, resulting in reduced work efficiency and increased operating costs. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a five-hole electric hammer drill bit, which aims to improve the existing five-hole electric hammer drill bit that uses spray coolant for cooling, but the coolant cannot be recovered and the cooling efficiency is reduced, resulting in reduced work efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a five-pit electric hammer drill bit, comprising a drill rod, a fixing rod fixedly connected to the top of the drill rod, a first guide groove formed on the outer wall of the drill rod, a second guide groove formed near the edge of the outer wall of the drill rod, a drain hole formed on the inner wall of the first guide groove, a liquid inlet hole formed on the inner wall of the second guide groove, a cooling groove formed at the bottom of the inner wall of both the drain hole and the liquid inlet hole, a plurality of annular grooves formed on the inner wall of each cooling groove, a plurality of positioning rings fixedly connected to the upper middle side of the outer wall of the drill rod, a liquid inlet sleeve rotatably connected between adjacent positioning rings, a plurality of liquid grooves formed on the inner wall of the liquid inlet sleeve, and an extension structure fixedly connected to the top of the fixing rod, the extension structure being used to adjust the length of the drill bit.

[0007] Through the above technical solution: the drill rod is used to support and install the entire structure; the cooling tank can evenly flow the liquid into all the annular grooves, so that the drill rod is filled with cooling liquid and thus cools down quickly; the positioning ring is used to limit the liquid inlet sleeve, ensuring that it can remain relatively stationary between the positioning rings when the drill is driven to rotate inside the drill rod; and the drain hole is used to discharge the heated cooling liquid from the drain hole through centrifugal force.

[0008] As a further description of the above technical solution:

[0009] The extension structure includes an extension rod, the bottom end of which is fixedly connected to the top end of a fixed rod. The outer wall of the fixed rod has a rotating thread, and a slot II is formed near the edge of the outer wall of the fixed rod. A sleeve block is threadedly connected to the inner wall of the rotating thread. Multiple fixed blocks are fixedly connected to the top end of the sleeve block. A movable sleeve is fixedly connected to the top of the fixed block. An extension handle is rotatably connected to the inner wall of the movable sleeve. A guide block is fixedly connected to the bottom end of the extension handle. Multiple slot I are formed on the outer walls of both the sleeve block and the extension rod.

[0010] Through the above technical solution: the first slot is used to insert a screw and make it pass through the second slot, thereby limiting the fixing rod, the sleeve block and the extension rod together, ensuring that the entire structure can be kept stable during use. The guide block prevents the sleeve block from rotating when it rotates, while the rotation of the extension rod can drive the extension rod and the structure at its bottom to rotate through the rotation of the guide block.

[0011] As a further description of the above technical solution:

[0012] The outer wall of the guide block is slidably connected to the inner wall of the extension rod, and the outer wall of the sleeve block is provided with multiple anti-slip textures.

[0013] The above technical solution uses anti-slip texture to increase the friction between the sleeve and the user's hand.

[0014] As a further description of the above technical solution:

[0015] A rubber ring is fixedly connected to the inward side of the positioning ring, and the inner wall of the liquid inlet sleeve is rotatably connected to the outer wall of the drill rod.

[0016] The above technical solution uses a rubber ring to improve the sealing between the positioning ring and the inlet sleeve.

[0017] As a further description of the above technical solution:

[0018] The inner wall of the liquid tank is connected to the inner walls of the first and second guide channels, and the multiple annular channels are all opened at the same horizontal height.

[0019] The above technical solution allows the coolant to be evenly distributed within the annular groove at the same horizontal height.

[0020] As a further description of the above technical solution:

[0021] The outer wall of the extension handle is provided with multiple mounting grooves, and the outer wall of the extension rod is fixedly connected with multiple scales.

[0022] The above technical solution involves a mounting slot used to quickly engage and connect the top of the extension shank with the drilling rig.

[0023] As a further description of the above technical solution:

[0024] The bottom end of the drill rod is provided with a drill tip, and the lower middle side of the outer wall of the drill rod is provided with spiral patterns.

[0025] The above technical solution is used to help users drill holes more effectively on hard surfaces.

[0026] As a further description of the above technical solution:

[0027] The inner wall of the cooling tank is connected to the inner wall of the annular groove, and all of the cooling tanks are opened at the same horizontal height.

[0028] Through the above technical solution, the cooling tank ensures that the coolant can evenly fill the inner walls of all the annular tanks.

[0029] This utility model has the following beneficial effects:

[0030] 1. In this utility model, when the drill rod rotates, the inlet sleeve remains relatively stationary between the positioning rings. At the same time, the cooling liquid is guided to the second guide groove through the liquid tank, and flows into the cooling tank through the inlet hole to fill the annular groove to cool the drill rod. Subsequently, due to the centrifugal force of rotation, it is thrown from the drain hole into the first guide groove and discharged through the liquid tank on the other side, achieving the purpose of rapid cooling of the drill bit through circulation, thus speeding up the work efficiency and reducing the cost of use.

[0031] 2. In this utility model, by rotating the sleeve block to move it on the fixed rod, the sleeve block is pushed to move along the extension rod, causing the extension shank to move upward. At the same time, after observing the scale at the fixed block to determine the adjusted length, the pin is reinserted into the first slot and passes through the second slot for limiting. The rotation of the extension shank can also drive the extension rod and its bottom structure to rotate through the guide block, thereby achieving the purpose of adjusting the length of the drill bit to adapt to different working scenarios, improving practicality and expanding the scope of application. Attached Figure Description

[0032] Figure 1This is a front perspective view of a five-pit electric hammer drill bit proposed in this utility model;

[0033] Figure 2 for Figure 2 Enlarged view of point A;

[0034] Figure 3 This is a partial structural breakdown diagram of the extension rod of a five-pit electric hammer drill bit proposed in this utility model;

[0035] Figure 4 This is a partial structural breakdown diagram of the fluid inlet sleeve of a five-pit electric hammer drill bit proposed in this utility model;

[0036] Figure 5 This is a cross-sectional view of a five-pit electric hammer drill bit proposed in this utility model.

[0037] Legend:

[0038] 1. Drill rod; 2. Extension structure; 201. Extension shank; 202. Sleeve block; 203. Slot 1; 204. Fixing block; 205. Moving sleeve; 206. Rotary thread; 207. Slot 2; 208. Extension rod; 209. Guide block; 3. First guide groove; 4. Second guide groove; 5. Drain hole; 6. Inlet sleeve; 7. Positioning ring; 8. Liquid tank; 9. Inlet hole; 10. Cooling tank; 11. Annular groove; 12. Rubber ring; 13. Fixing rod; 14. Anti-slip texture; 15. Mounting groove; 16. Spiral texture; 17. Drill tip; 18. Scale. Detailed Implementation

[0039] 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.

[0040] Please see the appendix Figure 1 - Appendix Figure 3 This utility model provides an embodiment of a five-pit electric hammer drill bit, including a drill rod 1. A fixing rod 13 is fixedly connected to the top of the drill rod 1. A first guide groove 3 is formed on the outer wall of the drill rod 1. The drill rod 1 is used to support and install the entire structure. A second guide groove 4 is formed on the outer wall of the drill rod 1 near the edge. A drain hole 5 is formed on the inner wall of the first guide groove 3. The drain hole 5 is used to drain cooling liquid. An inlet hole 9 is formed on the inner wall of the second guide groove 4. Cooling grooves 10 are formed at the bottom of the inner walls of the drain hole 5 and the inlet hole 9. Multiple annular grooves 11 are formed on the inner wall of the cooling grooves 10. The annular grooves 11 are used to fill all the cooling liquid into the drill rod 1 for cooling.

[0041] Specifically, the first guide channel 3 is used to guide the liquid discharged from the drain hole 5 outwards, and the second guide channel 4 is used to guide the liquid into the inlet hole 9, so that it can flow into the cooling tank 10. The cooling tank 10 can evenly fill all the annular grooves 11 with the liquid, so that the drill rod 1 is filled with cooling liquid and thus cools down quickly.

[0042] Please see the appendix Figure 3 - Appendix Figure 5 Multiple positioning rings 7 are fixedly connected to the upper side of the outer wall of the drill rod 1. A liquid inlet sleeve 6 is rotatably connected between adjacent positioning rings 7. Multiple liquid grooves 8 are opened on the inner wall of the liquid inlet sleeve 6. The positioning rings 7 are used to limit the liquid inlet sleeve 6. An extension structure 2 is fixedly connected to the top of the fixed rod 13. The extension structure 2 is used to adjust the length of the drill bit. A rubber ring 12 is fixedly connected to the inward side of the positioning ring 7. The rubber ring 12 is used to improve the sealing between the positioning ring 7 and the liquid inlet sleeve 6. The inner wall of the liquid inlet sleeve 6 is rotatably connected to the outer wall of the drill rod 1. The inner wall of the liquid groove 8 is connected to the inner wall of the first guide groove 3 and the second guide groove 4. The liquid in the liquid groove 8 can enter the first guide groove 3 and the second guide groove 4.

[0043] Specifically, the inlet sleeve 6 is used to install the inlet pipe, the inlet groove 8 is used to guide the liquid into or out of the inlet sleeve 6, so that the liquid can be exchanged and circulated in the first guide groove 3 and the second guide groove 4 connected thereto, and the rubber ring 12 can increase the sealing between the positioning ring 7 and the inlet sleeve 6, thereby preventing leakage during coolant circulation.

[0044] Please see the appendix Figure 2 - Appendix Figure 3 The extension structure 2 includes an extension rod 208, the bottom end of which is fixedly connected to the top end of a fixed rod 13. The outer wall of the fixed rod 13 has a rotating thread 206. The fixed rod 13 is used to support the top structure for movement and extension. A slot 207 is provided near the edge of the outer wall of the fixed rod 13. A sleeve block 202 is threadedly connected to the inner wall of the rotating thread 206. The rotating thread 206 helps the sleeve block 202 rotate and move along it. Multiple fixing blocks 204 are fixedly connected to the top end of the sleeve block 202. A movable sleeve 205 is fixedly connected to the top of the extension rod 208. An extension handle 201 is rotatably connected to the inner wall of the movable sleeve 205. A fixed block 204 is used to support the movable sleeve 205. A guide block 209 is fixedly connected to the bottom end of the extension handle 201. Multiple slots 203 are provided on the outer walls of the sleeve block 202 and the extension rod 208. The outer wall of the guide block 209 is slidably connected to the inner wall of the extension rod 208. Multiple anti-slip textures 14 are provided on the outer wall of the sleeve block 202. The guide block 209 is used to drive the extension rod 208 to rotate by rotating the extension handle 201.

[0045] Specifically, the anti-slip texture 14 is used to increase the friction between the sleeve 202 and the user's hand, thereby preventing the hand from slipping when rotating the sleeve 202. The first slot 203 allows the insertion of a pin that passes through the second slot 207, thereby limiting the sleeve 202, the extension rod 208, and the fixing rod 13, ensuring the drill bit remains stable during use. The extension shank 201 is used for mounting the drill bit to the drilling rig. The extension rod 208 is used to guide the sliding of its outer wall structure and allows the specific extension length to be observed.

[0046] Please see the appendix Figure 2 - Appendix Figure 4 The bottom end of the drill rod 1 is provided with a drill tip 17, and the lower middle side of the outer wall of the drill rod 1 is provided with a spiral pattern 16. The drill tip 17 is used to help the drill bit to drill better on hard surfaces. Multiple annular grooves 11 are all opened at the same horizontal height. The inner wall of the cooling groove 10 is connected to the inner wall of the annular groove 11. Multiple cooling grooves 10 are all opened at the same horizontal height. The annular grooves 11 at the same horizontal height can ensure that the cooling liquid is evenly distributed and filled in them. Multiple mounting grooves 15 are opened on the outer wall of the extension handle 201. Multiple scales 18 are fixedly connected to the outer wall of the extension rod 208. The mounting grooves 15 are used to engage the extension handle 201 with the drilling machine.

[0047] Specifically, the scale 18 helps the user understand the specific extension distance by observing it, thereby confirming whether further extension is needed. The mounting slot 15 is used to help the user quickly engage and connect the extension handle 201 with the drill rig. The spiral pattern 16 is used to help the drill rod 1 drill threads after it is drilled into the hole. The inner wall of the cooling groove 10 is connected to the inner wall of the annular groove 11, so that the liquid in the cooling groove 10 can flow into the annular groove 11, thereby filling the entire drill rod 1.

[0048] Working principle: When rapid cooling of the drill bit is required during drilling, the liquid injection pipe is first connected to the liquid tank 8 at a higher position. When the drill bit is rotated, the drill rod 1 will rotate, while the liquid inlet sleeve 6 will remain relatively stationary within the limit of the positioning ring 7. The liquid enters the second guide channel 4 through the liquid tank 8, then flows into the liquid inlet hole 9, and then is injected into the cooling tank 10 through the liquid inlet hole 9. It then enters the annular groove 11 to fill the entire drill bit. Subsequently, due to the rotation of the drill bit, the liquid is thrown out from the drain hole 5 at a lower position into the first guide channel 3, and then discharged from another liquid tank 8 for circulating cooling.

[0049] When the drill bit length needs to be adjusted, first pull out the pin inserted into the slot 1 203 and through the slot 2 207. Then rotate the sleeve block 202 to move it up or down along the fixed rod 13, thereby driving the movable sleeve 205 to move upward and push the extension shank 201 upward along the extension rod 208. At the same time, observe the scale 18 through the gap between the fixed block 204 and the movable sleeve 205 to determine the length to be adjusted. Then reinsert the pin into the slot 1 203, and then install the extension shank 201 on the drilling rig. It can drive the extension rod 208 through the guide block 209, thereby driving the fixed rod 13 and the bottom structure to rotate.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A five-hole electric hammer drill bit, comprising a drill rod (1), characterized in that: The drill rod (1) has a fixed rod (13) fixedly connected to its top end. The outer wall of the drill rod (1) has a first guide groove (3) and a second guide groove (4) near the edge of the outer wall. The inner wall of the first guide groove (3) has a drain hole (5) and the inner wall of the second guide groove (4) has an inlet hole (9). The bottom of the inner wall of the drain hole (5) and the inlet hole (9) both have a cooling groove (10). The inner wall of the cooling groove (10) has multiple annular grooves (11). The upper side of the outer wall of the drill rod (1) has multiple positioning rings (7) fixedly connected. The adjacent positioning rings (7) are rotatably connected to an inlet sleeve (6). The inner wall of the inlet sleeve (6) has multiple liquid grooves (8). The top end of the fixed rod (13) has an extension structure (2) fixedly connected. The extension structure (2) is used to adjust the length of the drill bit.

2. The five-hole electric hammer drill bit according to claim 1, characterized in that: The extension structure (2) includes an extension rod (208), the bottom end of which is fixedly connected to the top end of a fixed rod (13). The outer wall of the fixed rod (13) is provided with a rotating thread (206), and a slot 2 (207) is provided near the edge of the outer wall of the fixed rod (13). A sleeve block (202) is threadedly connected to the inner wall of the rotating thread (206). Multiple fixed blocks (204) are fixedly connected to the top end of the sleeve block (202). A movable sleeve (205) is fixedly connected to the top of the fixed block (204). An extension handle (201) is rotatably connected to the inner wall of the movable sleeve (205). A guide block (209) is fixedly connected to the bottom end of the extension handle (201). Multiple slots 1 (203) are provided on the outer walls of both the sleeve block (202) and the extension rod (208).

3. A five-hole electric hammer drill bit according to claim 2, characterized in that: The outer wall of the guide block (209) is slidably connected to the inner wall of the extension rod (208), and the outer wall of the sleeve block (202) is provided with multiple anti-slip textures (14).

4. A five-flute electric hammer drill bit according to claim 1, characterized in that: A rubber ring (12) is fixedly connected to the inner side of the positioning ring (7), and the inner wall of the liquid inlet sleeve (6) is rotatably connected to the outer wall of the drill rod (1).

5. A five-hole electric hammer drill bit according to claim 1, characterized in that: The inner wall of the liquid tank (8) is connected to the inner walls of the first guide channel (3) and the second guide channel (4), and the multiple annular channels (11) are all opened at the same horizontal height.

6. A five-hole electric hammer drill bit according to claim 2, characterized in that: The outer wall of the extension handle (201) is provided with multiple mounting grooves (15), and the outer wall of the extension rod (208) is fixedly connected with multiple scales (18).

7. A five-hole electric hammer drill bit according to claim 1, characterized in that: The bottom end of the drill rod (1) is provided with a drill tip (17), and the lower middle side of the outer wall of the drill rod (1) is provided with a spiral pattern (16).

8. A five-flute electric hammer drill bit according to claim 1, characterized in that: The inner wall of the cooling groove (10) is connected to the inner wall of the annular groove (11), and the multiple cooling grooves (10) are all opened at the same horizontal height.

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