Spline electric hammer drill bit
By introducing heat-insulating connectors and replacement mechanisms into splined hammer drill bits, the problems of lack of heat insulation and heat dissipation in existing technologies are solved, achieving efficient operational safety and convenient drill bit replacement, extending tool life and reducing maintenance costs.
Patent Information
- Application Number
- CN202422964920.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-03
AI Technical Summary
Existing spline electric hammer drill bits lack heat insulation and heat dissipation components, resulting in low operating efficiency.
A splined hammer drill bit including a heat-insulating connector and a replacement mechanism was designed. The heat-insulating connector prevents heat transfer through the upper and lower heat-insulating pads, and achieves effective heat dissipation through heat dissipation holes and anti-slip threads. At the same time, the replacement mechanism facilitates the replacement of the drill bit.
It improves operational safety and efficiency, extends drill bit lifespan, reduces maintenance costs, and enhances operator comfort and tool performance.
Smart Images
Figure CN223476383U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drill bit technology, and in particular to a splined electric hammer drill bit. Background Technology
[0002] Splined hammer drill bits are drill bits specifically designed for use with hammer drills. The splined connection ensures the drill bit is securely attached to the hammer drill during use, preventing loosening or detachment and improving work safety. The spline structure effectively transmits torque, making the drill bit more stable during drilling. Suitable for handling high-strength materials, including concrete and masonry, splined hammer drill bits are available in various types and sizes to meet different drilling diameters and depths, satisfying diverse construction requirements.
[0003] Splined hammer drill bits, with their unique connection method and diverse applications, have become an indispensable part of hammer drill tools. High-quality splined drill bits are made of carbide or high-speed steel, which has good wear resistance and can maintain good cutting performance for a long time. The standardized spline design makes the drill bit replacement process simple and quick, allowing users to quickly change to the appropriate drill bit for different work tasks. Splined hammer drill bits are widely used in the fields of construction, decoration and maintenance, and are suitable for professional construction workers.
[0004] Electric hammer drill bits are designed for hard materials such as concrete and masonry, and have strong penetrating power. Electric hammer drill bits can efficiently complete drilling work, especially in hard materials, saving time and effort. However, after high-intensity operation, existing splined electric hammer drill bits generate a lot of heat that is transferred upwards. When the drill bit needs to be replaced, it is necessary to wait for the drill body to cool down, resulting in low work efficiency. They also lack heat insulation and heat dissipation components. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a splined electric hammer drill bit, which aims to improve the problem of low work efficiency caused by the lack of heat insulation and heat dissipation components in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a splined electric hammer drill bit, comprising a connecting head, wherein upper fixing holes are provided on both the left and right sides of the connecting head, upper fixing bolts are threadedly connected to the inner walls of the upper fixing holes, and heat insulation connectors are threadedly connected to the outer walls of the upper fixing bolts. An upper heat-insulating pad is fixedly connected to the top of the heat insulation connector, and a lower heat-insulating pad is fixedly connected to the inner wall of the bottom of the heat insulation connector. Lower fixing bolts are threadedly connected to both the left and right sides of the bottom of the heat insulation connector, and a drill string is threadedly connected to the outer wall of the lower fixing bolts. Lower fixing holes are provided on the left and right sides of the top of the drill string, and the inner walls of the lower fixing holes are threadedly connected to the outer walls of the lower fixing bolts. A replacement mechanism is provided at the bottom of the drill string, and the replacement mechanism is used for quick replacement of the drill bit.
[0007] Through the above technical solution: the connecting column head is not only stable but also easy to operate. The upper fixing bolt, as a key component of the connection, has its outer wall thread precisely fixed to the inner wall thread of the heat insulation connector, ensuring the stability and durability of the connection. The heat insulation connector plays a connecting role in the structure. The upper heat insulation pad effectively reduces the impact of heat generated during drilling operations on the operator, improving the safety of the operation. The lower heat insulation pad is also fixedly connected to the lower inner wall of the heat insulation connector, further enhancing the overall heat insulation effect. The outer wall thread of the lower fixing bolt is connected to the inner wall thread of the drill string, ensuring the stability of the drill string and facilitating disassembly and replacement. The replacement mechanism makes it convenient to replace the drill bit, allowing for the replacement of different specifications of drill bits to meet different operational needs.
[0008] As a further description of the above technical solution:
[0009] The replacement mechanism includes a drill bit sleeve, the inner wall of which is threadedly connected to the bottom of the drill string. The bottom of the drill string has grooves on all four sides and a threaded hole at its bottom. A fixing rib is fixedly connected to the inner wall of the drill bit sleeve, and the outer wall of the fixing rib is slidably connected to the inner wall of the groove. A threaded hole is opened at the bottom of the drill bit sleeve, and a heavy bolt is slidably connected to the inner wall of the threaded hole. The outer wall of the heavy bolt is threadedly connected to the inner wall of the threaded hole. Ribs are fixedly connected to all four sides of the outer wall of the drill bit sleeve.
[0010] Through the above technical solutions: the slot enhances the stability of the structure and provides convenience for subsequent replacement operations; the threaded hole allows for precise thread engagement with the powerful bolt inside the drill bit sleeve; the outer wall of the fixing edge slides and the inner wall of the slot, ensuring flexible operation during replacement; the powerful bolt ensures a firm connection between the drill bit sleeve and the drill string; and the ribs effectively distribute pressure, reduce wear, and extend the service life of the drill bit sleeve.
[0011] As a further description of the above technical solution:
[0012] The top outer wall of the heat insulation connector is fixedly connected to an upper heat insulation ring, and the inner wall of the upper heat insulation ring is fixedly connected to the outer wall of the upper heat insulation pad.
[0013] Through the above technical solution, the inner wall of the upper heat insulation ring is closely connected to the outer wall of the upper heat insulation pad, ensuring effective heat isolation.
[0014] As a further description of the above technical solution:
[0015] The bottom outer wall of the heat insulation connector is fixedly connected to a lower heat insulation ring, and the inner wall of the lower heat insulation ring is fixedly connected to the outer wall of the lower heat insulation pad.
[0016] Through the above technical solution, the inner wall of the lower heat insulation ring is also firmly bonded to the outer wall of the lower heat insulation pad, further enhancing the overall heat insulation effect.
[0017] As a further description of the above technical solution:
[0018] The outer wall of the heat insulation connector is fixedly connected with anti-slip ridges, which are long strips in shape.
[0019] Through the above technical solution, the anti-slip ridges are evenly distributed in long strips on the outer wall of the heat insulation connector, which improves the grip safety and ease of operation during use.
[0020] As a further description of the above technical solution:
[0021] The outer wall of the heat insulation connector is evenly provided with small heat dissipation holes, and the top of the drill string is fixedly connected with anti-slip threads.
[0022] The above technical solutions ensure heat dissipation through small ventilation holes, effectively cooling the connectors, and improve operational safety through anti-slip threads.
[0023] As a further description of the above technical solution:
[0024] The outer wall of the drill string is fixedly connected with a drill body thread, which is helical.
[0025] The above technical solution ensures the stability and reliability of the drill body threads in drilling operations by arranging them in a spiral shape along the axis of the drill string.
[0026] As a further description of the above technical solution:
[0027] A heat insulation ring is fixedly connected to the top of the drill string, and a connecting ridge is fixedly connected to the top of the connecting head.
[0028] Through the above technical solution: the heat insulation ring of the drill string provides additional heat insulation protection during drill string operation to prevent heat from being transferred to other parts of the connector, and the connecting ridge enhances the strength of the connecting head.
[0029] This utility model has the following beneficial effects:
[0030] 1. In this utility model, the upper and lower heat-insulating pads in the heat-insulating connector prevent heat from being transferred upwards, ensuring the safety of changing positions. The heat insulation and heat dissipation functions can effectively reduce the temperature of the drill bit during operation, reduce the damage to materials caused by overheating, and thus extend the service life of the drill bit. During use, excessively high drill bit temperature may cause discomfort to the operator's hands. A good heat insulation and heat dissipation design can keep the handle temperature suitable and improve the operator's comfort.
[0031] 2. In this utility model, the fixed edge is engaged by the slot, so that the drill bit sleeve and the drill string rotate synchronously. The ribs on the outer wall of the drill bit sleeve achieve efficient drilling. When the drill bit is worn or damaged, only the drill bit sleeve needs to be replaced instead of the entire tool. This can save costs and reduce the overall cost of using the tool. The replaceable design makes maintenance and upkeep simpler. Users can replace the drill bit regularly as needed to maintain the best performance of the tool. Attached Figure Description
[0032] Figure 1 A perspective view of the drill string front side of a splined electric hammer drill bit proposed in this utility model;
[0033] Figure 2 This is a perspective view of the drill string on the left side of a splined electric hammer drill bit proposed in this utility model;
[0034] Figure 3 This is a split view of the drill string structure of a splined electric hammer drill bit proposed in this utility model;
[0035] Figure 4 This is a partial structural exploded view of a splined electric hammer drill bit replacement mechanism proposed in this utility model;
[0036] Figure 5 This is a partial structural diagram of the drill bit sleeve of a splined electric hammer drill bit proposed in this utility model.
[0037] Legend:
[0038] 1. Connecting column head; 2. Replacement mechanism; 201. Slot; 202. Threaded hole; 203. Drill bit sleeve; 204. Threaded hole; 205. Heavy bolt; 206. Fixing ridge; 207. Rib; 3. Upper fixing hole; 4. Upper fixing bolt; 5. Upper heat insulation pad; 6. Heat insulation connector; 7. Lower heat insulation pad; 8. Lower fixing bolt; 9. Lower fixing hole; 10. Drill column; 11. Upper heat insulation ring; 12. Anti-slip ridge; 13. Heat dissipation hole; 14. Anti-slip thread; 15. Column heat insulation ring; 16. Connecting ridge; 17. Drill body thread; 18. Lower heat insulation ring. Detailed Implementation
[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0040] Please see the appendix Figure 1 - Appendix Figure 3 An embodiment of this utility model provides: a splined electric hammer drill bit, including a connecting head 1, with upper fixing holes 3 on both the left and right sides of the connecting head 1, upper fixing bolts 4 threadedly connected to the inner wall of the upper fixing holes 3, and heat insulation connectors 6 threadedly connected to the outer wall of the upper fixing bolts 4, with an upper heat-insulating pad 5 fixedly connected to the top of the heat insulation connector 6, and a lower heat-insulating pad 7 fixedly connected to the inner wall of the bottom of the heat insulation connector 6, with lower fixing bolts 8 threadedly connected to both the left and right sides of the bottom of the heat insulation connector 6, and a drill string 10 threadedly connected to the outer wall of the lower fixing bolts 8, with lower fixing holes 9 on the left and right sides of the top of the drill string 10, and the inner wall of the lower fixing holes 9 threadedly connected to the outer wall of the lower fixing bolts 8, and a replacement mechanism 2 provided at the bottom of the drill string 10, which is used for quick replacement of the drill bit;
[0041] Specifically, the connecting column head 1 is not only stable but also easy to operate. The upper fixing bolt 4, as a key component of the connection, has its outer wall thread precisely fixed to the inner wall thread of the heat insulation connector 6, ensuring the stability and durability of the connection. The heat insulation connector 6 plays a connecting role in the structure. The upper heat insulation pad 5 effectively reduces the impact of heat generated during drilling operations on the operator and improves the safety of the operation. The lower heat insulation pad 7 is also fixedly connected to the lower inner wall of the heat insulation connector 6, further enhancing the overall heat insulation effect. The outer wall thread of the lower fixing bolt 8 is connected to the inner wall thread of the drill string 10, ensuring the stability of the drill string 10 and facilitating disassembly and replacement. The replacement mechanism 2 makes it convenient to replace the drill bit with different specifications to adapt to different operation needs.
[0042] Please see the appendix Figure 4 - Appendix Figure 5 The replacement mechanism 2 includes a drill bit sleeve 203. The inner wall of the drill bit sleeve 203 is threadedly connected to the bottom of the drill string 10. The bottom of the drill string 10 is provided with slots 201 on all four sides and threaded holes 202 on the bottom. The inner wall of the drill bit sleeve 203 is fixedly connected with a fixing rib 206. The outer wall of the fixing rib 206 is slidably connected to the inner wall of the slot 201. The bottom of the drill bit sleeve 203 is provided with a threaded hole 204. The inner wall of the threaded hole 204 is slidably connected with a strong bolt 205. The outer wall of the strong bolt 205 is threadedly connected to the inner wall of the threaded hole 202. Ribs 207 are fixedly connected to all four sides of the outer wall of the drill bit sleeve 203.
[0043] Specifically, the slot 201 enhances the stability of the structure and facilitates subsequent replacement operations. The threaded hole 202 can precisely engage with the powerful bolt 205 inside the drill bit sleeve 203. The outer wall of the fixing rib 206 slides with the inner wall of the slot 201, ensuring flexible operation during replacement. The powerful bolt 205 ensures a firm connection between the drill bit sleeve 203 and the drill string 10. The rib 207 can effectively distribute pressure, reduce wear, and extend the service life of the drill bit sleeve 203.
[0044] Please see the appendix Figure 1 - Appendix Figure 2 The upper heat insulation ring 11 is fixedly connected to the top outer wall of the heat insulation connector 6. The inner wall of the upper heat insulation ring 11 is fixedly connected to the outer wall of the upper heat insulation pad 5. The lower heat insulation ring 18 is fixedly connected to the bottom outer wall of the heat insulation connector 6. The inner wall of the lower heat insulation ring 18 is fixedly connected to the outer wall of the lower heat insulation pad 7. The outer wall of the heat insulation connector 6 is fixedly connected to the anti-slip rib 12, which is long and narrow.
[0045] Specifically, the inner wall of the upper heat insulation ring 11 is tightly connected to the outer wall of the upper heat insulation pad 5, ensuring effective heat insulation. The inner wall of the lower heat insulation ring 18 is also firmly connected to the outer wall of the lower heat insulation pad 7, further enhancing the overall heat insulation effect. The anti-slip ridge 12 improves grip safety and ease of operation during use.
[0046] Please see the appendix Figure 1 - Appendix Figure 3 The heat insulation connector 6 has small heat dissipation holes 13 evenly opened around the outer wall. The top of the drill column 10 is fixedly connected with anti-slip threads 14. The outer wall of the drill column 10 is fixedly connected with drill body threads 17, which are spiral. The top of the drill column 10 is fixedly connected with a column heat insulation ring 15. The top of the connecting column head 1 is fixedly connected with a connecting ridge 16.
[0047] Specifically, the heat dissipation holes 13 ensure heat dissipation and effective heat dissipation of the connectors; the anti-slip threads 14 enhance the connection stability of the drill string 10 with other components and improve safety during operation; the heat insulation ring 15 provides additional heat insulation protection when the drill string 10 is working to prevent heat from being transferred to other parts of the connectors; and the connecting ridge 16 enhances the strength of the connecting head 1.
[0048] Working principle: When the electric hammer drill bit has been working for a long time, the drill bit will generate heat due to friction. The heat is relieved by setting a heat-insulating connector 6 between the drill bit 10 and the connecting head 1. The top of the heat-insulating connector 6 is fixedly connected to the upper fixing hole 3 of the connecting head 1 by the upper fixing bolt 4, and the bottom of the heat-insulating connector 6 is fixedly connected to the lower fixing hole 9 of the drill bit 10 by the lower fixing bolt 8. The upper heat-insulating pad 5 and the lower heat-insulating pad 7 in the heat-insulating connector 6 prevent the heat from being transferred upward, ensuring the safety of changing positions. The heat insulation and heat dissipation functions can effectively reduce the temperature of the drill bit during operation, reduce the damage to the material caused by overheating, and thus extend the service life of the drill bit. During use, the drill bit temperature may be too high, which may cause discomfort to the operator's hands. A good heat insulation and heat dissipation design can keep the handle temperature at a suitable level and improve the operator's comfort.
[0049] When the hammer drill bit is working, the bottom of the drill string 10 is first driven into the drilling area. The bottom of the drill string 10 is easily damaged, and if it needs to be replaced, the entire drill string 10 needs to be replaced, which is a waste of resources. The bottom of the drill string 10 is connected to the drill bit sleeve 203 by thread, and the drill bit sleeve 203 is fixed in the threaded hole 202 of the drill string 10 by a strong bolt 205. The fixing rib 206 is engaged by the slot 201, so that the drill bit sleeve 203 and the drill string 10 rotate synchronously. The ribs 207 on the outer wall of the drill bit sleeve 203 achieve efficient drilling. When the drill bit is worn and damaged, only the drill bit needs to be replaced instead of the entire tool. This can save costs and reduce the overall cost of using the tool. The replaceable design makes maintenance and upkeep simpler. Users can replace the drill bit as needed to maintain the best performance of the tool.
[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 splined electric hammer drill bit, comprising a connecting post (1), characterized in that: The connecting head (1) has upper fixing holes (3) on both the left and right sides. The inner wall of the upper fixing hole (3) is threaded with an upper fixing bolt (4). The outer wall of the upper fixing bolt (4) is threaded with a heat insulation connector (6). The top of the heat insulation connector (6) is fixedly connected with an upper heat insulation pad (5). The bottom inner wall of the heat insulation connector (6) is fixedly connected with a lower heat insulation pad (7). The bottom left and right sides of the heat insulation connector (6) are threaded with lower fixing bolts (8). The outer wall of the lower fixing bolt (8) is threaded with a drill string (10). The top left and right sides of the drill string (10) have lower fixing holes (9). The inner wall of the lower fixing hole (9) is threaded with the outer wall of the lower fixing bolt (8). The bottom of the drill string (10) is provided with a replacement mechanism (2). The replacement mechanism (2) is used for quick replacement of drill bits.
2. A splined electric hammer drill bit according to claim 1, characterized in that: The replacement mechanism (2) includes a drill bit sleeve (203), the inner wall of which is threaded to the bottom of the drill string (10), the bottom of the drill string (10) is provided with a slot (201) around its perimeter, the bottom of the drill string (10) is provided with a threaded hole (202), the inner wall of the drill bit sleeve (203) is fixedly connected with a fixing rib (206), the outer wall of the fixing rib (206) is slidably connected to the inner wall of the slot (201), the bottom of the drill bit sleeve (203) is provided with a threaded hole (204), the inner wall of the threaded hole (204) is slidably connected with a high-strength bolt (205), the outer wall of the high-strength bolt (205) is threadedly connected to the inner wall of the threaded hole (202), and the outer wall of the drill bit sleeve (203) is fixedly connected with a rib (207) around its perimeter.
3. A splined electric hammer drill bit according to claim 1, characterized in that: The top outer wall of the heat insulation connector (6) is fixedly connected to an upper heat insulation ring (11), and the inner wall of the upper heat insulation ring (11) is fixedly connected to the outer wall of the upper heat insulation pad (5).
4. A splined electric hammer drill bit according to claim 1, characterized in that: The bottom outer wall of the heat insulation connector (6) is fixedly connected to a lower heat insulation ring (18), and the inner wall of the lower heat insulation ring (18) is fixedly connected to the outer wall of the lower heat insulation pad (7).
5. A splined electric hammer drill bit according to claim 1, characterized in that: The outer wall of the heat insulation connector (6) is fixedly connected with an anti-slip rib (12), which is long and narrow.
6. A splined electric hammer drill bit according to claim 1, characterized in that: The heat insulation connector (6) has small heat dissipation holes (13) evenly opened around its outer wall, and the top of the drill string (10) is fixedly connected with anti-slip threads (14).
7. A splined electric hammer drill bit according to claim 1, characterized in that: The outer wall of the drill string (10) is fixedly connected with a drill body thread (17), which is helical.
8. A splined electric hammer drill bit according to claim 1, characterized in that: The top of the drill string (10) is fixedly connected to a column heat insulation ring (15), and the top of the connecting column head (1) is fixedly connected to a connecting ridge (16).