A prefabricated hammer drill bit

Abstract

This utility model discloses an assembled electric hammer drill bit, belonging to the technical field of assembled electric hammer drills. It includes a connector and a drill body. One end of the connector is embedded inside the electric hammer drill, and the other end is embedded inside the drill body. Four slots are equally spaced on the outer side of the end of the connector embedded in the electric hammer drill. The connector's interior is equipped with an anti-wear structure. This utility model solves the problem that the service life of a drill bit cannot be extended because specific wear points cannot be replaced. By assembling the connector, drill bit, and drill body, this utility model allows for the replacement of individual parts when wear occurs, increasing the service life of other parts. Furthermore, when the electric hammer drill strikes the connector, a hammer plate provides shock absorption, and the hammer plate is directly impacted, buffering the connector and further increasing its service life.

Description

Technical Field

[0001] This utility model relates to the field of assembled electric hammer drill technology, specifically an assembled electric hammer drill bit. Background Technology

[0002] A hammer drill can simultaneously provide the drill bit with rotational power and impact force, thereby causing the drill bit to vibrate and rotate, thus improving drilling efficiency. However, conventional drill bits have some drawbacks in use, such as:

[0003] When using a typical electric hammer drill bit, the connection between the drill bit and the drill bit will wear down due to frequent impacts, causing deformation at the impact point and rendering the drill bit unusable. The side of the drill bit that is in direct contact with the material will experience the greatest force, so the tip of the drill bit is also prone to wear. Since specific wear points on the drill bit cannot be replaced, the service life of the drill bit cannot be extended. Utility Model Content

[0004] The purpose of this invention is to provide an assembled electric hammer drill bit that allows for replacement of various worn parts of the drill bit, thereby extending the service life of the drill bit and solving the problems in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: including a connector and a drill body, one end of the connector is embedded in the inside of the electric hammer drill, the other end of the connector is embedded in the inside of the drill body, four slots are equally spaced on the outer side of the end of the connector embedded in the electric hammer drill, the inside of the connector is provided with an anti-wear structure, and the outer side of the drill body is spiral-shaped.

[0006] Preferably, the wear-resistant structure includes a hammer plate and a connecting column. The distance between the hammer plate and the drill body is greater than the distance between the connecting column and the drill body. The connecting column is provided at equal angles on the side of the hammer plate. The hammer plate and the connecting column are embedded in the connector head and embedded in one end of the electric hammer drill.

[0007] Preferably, the end of the connecting post furthest from the hammer plate is hemispherical, and the gap between the connector and the hammer plate is greater than the gap between the connector and the connecting post.

[0008] Preferably, a first groove is provided at the center of one side of the hammer plate embedded in the connector, and a second groove is provided on the side of the connector located directly below the first groove. Limiting mechanisms are provided inside the first and second grooves.

[0009] Preferably, the limiting mechanism includes a connecting bolt, which consists of limiting heads at both ends and a support rod in the center. The limiting heads are elastic and hemispherical. The two limiting heads are respectively embedded in the first slide groove and the second slide groove.

[0010] Preferably, the connector is embedded inside the drill body, and the connector and the drill body are penetrated by a clamping rod and a clamping strip. The clamping rod is cylindrical, and the clamping strip is located on the side of the clamping rod to increase the contact area.

[0011] Preferably, the notches on both sides of the drill body are stepped, the outer diameter of the notch is larger than the inner diameter of the notch, the outer side of the notch is threaded with a limit sleeve, and the inside of the notch is engaged with a locking rod and a locking strip.

[0012] Preferably, the limiting sleeve is annular, and the locking rod and locking strip are embedded inside the limiting sleeve.

[0013] Preferably, the lower end of the drill body is internally threaded with a connecting rod, and a drill bit is fixedly installed at the bottom of the connecting rod.

[0014] Preferably, the bottom of the drill bit has a chip removal groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention combines the connector, drill bit, and drill body into a single assembly. When the drill bit and drill body show signs of wear, individual parts can be replaced, increasing the service life of other parts. At the same time, when the hammer drill strikes the connector, the hammer plate provides shock absorption, and the hammer plate is directly impacted, which buffers the connector and further increases its service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connector and hammer plate installation structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the connector and the drill body of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the locking rod and locking strip of this utility model;

[0021] Figure 5 This is a schematic diagram of the installation structure of the drill body and drill bit of this utility model.

[0022] In the diagram: 1. Connector; 11. Slot; 12. Hammering plate; 13. Connecting post; 14. First sliding groove; 15. Connecting bolt; 2. Drill body; 21. Locking rod; 22. Locking strip; 23. Limiting sleeve; 3. Drill bit; 31. Connecting rod; 32. Chip removal groove. Detailed Implementation

[0023] 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.

[0024] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0025] Combination Figures 1-5 The present invention provides an assembled electric hammer drill bit, comprising a connector 1 and a drill body 2. One end of the connector 1 is embedded in the inside of the electric hammer drill, and the other end of the connector 1 is embedded in the inside of the drill body 2. Four slots 11 are equally spaced on the outer side of the end of the connector 1 embedded in the electric hammer drill. The inside of the connector 1 is provided with an anti-wear structure, and the outer side of the drill body 2 is spiral-shaped.

[0026] It should be noted that the connector 1 can be connected to the electric hammer drill through the slot 11, so that the electric hammer drill can drive the connector 1 to rotate.

[0027] In this embodiment, the wear-resistant structure includes a hammer plate 12 and a connecting post 13. The distance between the hammer plate 12 and the drill body 2 is greater than the distance between the connecting post 13 and the drill body 2. The connecting post 13 is provided at equal angles on the side of the hammer plate 12. The hammer plate 12 and the connecting post 13 are embedded in the connector 1 and embedded in one end of the electric hammer drill.

[0028] In this embodiment, the end of the connecting post 13 furthest from the hammer plate 12 is hemispherical, and the gap between the connector 1 and the hammer plate 12 is greater than the gap between the connector 1 and the connecting post 13.

[0029] It should be noted that the electric hammer drill continuously applies force to the hammer plate 12, thereby causing vibration force on the connector 1 and the drill body 2, increasing the drilling effect of the equipment. When force is applied to the hammer plate 12, the gap between the hammer plate 12 and the connector 1 can buffer the connector 1. Then the force is transmitted to the connector 1 through the hammer plate 12 and the connecting post 13. Thus, when the equipment is in use, the hammer plate 12 is a vulnerable part, which can protect the connector 1 and extend the service life of the connector 1.

[0030] In this embodiment, a first groove 14 is provided at the center of one side of the hammer plate 12 embedded into the connector 1, and a second groove is provided on the side of the connector 1 located directly below the first groove 14. Limiting mechanisms are provided inside the first groove 14 and the second groove.

[0031] In this embodiment, the limiting mechanism includes a connecting bolt 15, which consists of limiting heads at both ends and a support rod in the center. The limiting heads are elastic and hemispherical. The two limiting heads are respectively embedded in the first slide groove 14 and the second slide groove.

[0032] It should be noted that the limiting heads are respectively embedded in the first slide groove 14 and the second slide groove. Since the embedding end of the limiting head is arc-shaped and the other end is flat, the limiting head is easy to embed into the first slide groove 14 and the second slide groove. However, it takes a lot of force to remove the limiting head from the first slide groove 14 and the second slide groove. When the limiting head is located in the first slide groove 14 and the second slide groove, it will limit the distance between the hammer plate 12 and the connector 1, preventing the hammer plate 12 from slipping out of the connector 1. At the same time, it will make a certain gap between the connector 1 and the hammer plate 12 for buffering. The hardness of the hammer plate 12 and the connecting post 13 is less than the hardness of the connector 1.

[0033] In this embodiment, the connector 1 is embedded inside the drill body 2, and the connector 1 and the drill body 2 are penetrated by the clamping rod 21 and the clamping strip 22. The clamping rod 21 is cylindrical, and the clamping strip 22 is provided on the side of the clamping rod 21 to increase the contact area.

[0034] In this embodiment, the notches on both sides of the drill body 2 are stepped, the outer diameter of the notch is larger than the inner diameter of the notch, the outer side of the notch is threadedly connected to the limit sleeve 23, and the inside of the notch is engaged with the locking rod 21 and the locking strip 22.

[0035] In this embodiment, the limiting sleeve 23 is annular, and the locking rod 21 and the locking strip 22 are embedded inside the limiting sleeve 23.

[0036] It should be noted that after the connector 1 is embedded inside the drill body 2, the locking rod 21 and the locking strip 22 are embedded inside the connector 1 and the drill body 2, so that the locking rod 21 and the locking strip 22 are respectively engaged with the connector 1 and the drill body 2. Thus, when the connector 1 moves, the locking rod 21 and the locking strip 22 will be forced to move the drill body 2. Furthermore, the limiting sleeve 23 is connected to the drill body 2, which can limit the locking rod 21 and the locking strip 22, thereby increasing the stability of the locking rod 21 and the locking strip 22 during use.

[0037] In this embodiment, a connecting rod 31 is threadedly connected to the lower end of the drill body 2, and a drill bit 3 is fixedly installed at the bottom of the connecting rod 31.

[0038] In this embodiment, a chip removal groove 32 is provided at the bottom of the drill bit 3.

[0039] It should be noted that the drill bit 3 and the drill body 2 are connected by the connecting rod 31, and the threaded connection direction of the connecting rod 31 is opposite to the rotation direction of the drill body 2 and the drill bit 3. The bottom of the drill bit 3 is in the shape of an "I", which can effectively improve the drilling speed. It is also equipped with a chip removal groove 32 to facilitate the discharge of chips from both sides, further improving the drilling efficiency.

[0040] Working principle: When the equipment is in use, the connector 1 is fitted inside the drill body 2, and then the connector 1 and the drill body 2 are engaged and connected by the clamping rod 21 and the clamping strip 22, thereby limiting and fixing the two. Then, the limiting sleeve 23 is connected to the drill body 2, thereby limiting and fixing the clamping rod 21 and the clamping strip 22, increasing the stability of the clamping rod 21 and the clamping strip 22 during use. Finally, the drill bit 3 is rotated to connect and fix the connecting rod 31 and the drill body 2.

[0041] When using the equipment, connect the connector 1 to the electric hammer drill. The electric hammer drill will then limit the connector 1 through the slot 11, thereby driving the connector 1 to rotate. At the same time, the electric hammer drill will continuously strike the hammer plate 12, thereby causing the connector 1, drill body 2 and drill bit 3 to vibrate, improving the drilling efficiency of the equipment.

[0042] During the drilling process, the hammer plates 12 are subjected to impact force. The hammer plates 12 have a lower density than the connector 1, and there is a gap between the hammer plates 12 and the connector 1. Therefore, the hammer plates 12 can reduce the wear of the connector 1. When the drill body 2 and the drill bit 3 are worn during the drilling process, they can be replaced separately, thereby reducing the wear cost of the equipment.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An assembled electric hammer drill bit, comprising a connector (1) and a drill body (2), characterized in that: One end of the connector (1) is embedded inside the electric hammer drill, and the other end of the connector (1) is embedded inside the drill body (2). The connector (1) is embedded in the outside of the electric hammer drill with four slots (11) at equal angles. The inside of the connector (1) is provided with an anti-wear structure, and the outside of the drill body (2) is spiral.

2. The assembled electric hammer drill bit according to claim 1, characterized in that: The wear-resistant structure includes a hammer plate (12) and a connecting post (13). The distance between the hammer plate (12) and the drill body (2) is greater than the distance between the connecting post (13) and the drill body (2). The connecting post (13) is provided at equal angles on the side of the hammer plate (12). The hammer plate (12) and the connecting post (13) are embedded in the connector (1) and embedded in one end of the electric hammer drill.

3. The assembled electric hammer drill bit according to claim 2, characterized in that: The end of the connecting post (13) that is far from the hammer plate (12) is hemispherical, and the gap between the connector (1) and the hammer plate (12) is greater than the gap between the connector (1) and the connecting post (13).

4. The assembled electric hammer drill bit according to claim 2, characterized in that: The hammer plate (12) is embedded in the center of one side of the connector (1) and a first groove (14) is provided. The connector (1) is located directly below the first groove (14) and a second groove is provided on the side. The first groove (14) and the second groove are provided with a limit mechanism.

5. The assembled electric hammer drill bit according to claim 4, characterized in that: The limiting mechanism includes a connecting bolt (15), which consists of limiting heads at both ends and a support rod in the center. The limiting heads are elastic and hemispherical. The two limiting heads are respectively embedded in the first slide groove (14) and the second slide groove.

6. The assembled electric hammer drill bit according to claim 1, characterized in that: The connector (1) is embedded inside the drill body (2), and the connector (1) and the drill body (2) are penetrated by the clamp rod (21) and the clamp strip (22). The clamp rod (21) is cylindrical, and the clamp strip (22) is set on the side of the clamp rod (21) to increase the contact area.

7. A prefabricated hammer drill bit according to claim 6, characterized in that: The drill body (2) has stepped notches on both sides. The outer diameter of the notch is larger than the inner diameter of the notch. The outer side of the notch is threaded with a limit sleeve (23). The inside of the notch is engaged with a locking rod (21) and a locking strip (22).

8. A prefabricated hammer drill bit according to claim 7, characterized in that: The limiting sleeve (23) is circular, and the locking rod (21) and locking strip (22) are embedded inside the limiting sleeve (23).

9. A prefabricated hammer drill bit according to claim 1, characterized in that: The lower end of the drill body (2) is internally threaded with a connecting rod (31), and a drill bit (3) is fixedly installed at the bottom of the connecting rod (31).

10. A prefabricated hammer drill bit according to claim 1, characterized in that: The bottom of the drill bit (3) is provided with a chip removal groove (32).

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