A multi-jaw down-the-hole drill bit

Abstract

The utility model provides a kind of multi-claw type down-the-hole drill bit, including seat body, seat body top is connected with drill handle, seat body bottom is equipped with multiple extension parts extending from the center to outside, seat body bottom is also equipped with multiple mounting parts, mounting part other end extends to seat body edge, the bottom side of extension part is equipped with several second drill teeth, the central axis of second drill tooth and the rotation plane of seat body exist certain acute angle angle, and the end of second drill tooth is consistent with the rotation direction of seat body, the bottom of extension part and mounting part is equipped with several third drill teeth. The utility model is used, the extension part set increases the broken area, makes the diameter of drill hole larger, and second drill tooth can be inserted into object surface with inclined posture, so it is easier to break object, and the speed of drill head becomes faster.

Description

Technical Field

[0001] This utility model relates to the field of drill bit technology, specifically a multi-claw down-the-hole drill bit. Background Technology

[0002] Down-the-hole drill bits are one of the core tools for hard rock drilling and are mainly used in open-pit and underground engineering drilling, side pile support, geothermal well drilling, subway engineering excavation, geological exploration and other fields.

[0003] For example, the multi-claw down-the-hole drill bit proposed in document number "CN211342786U" has the following description in paragraph

[0033] : "Drill shank 1 and drill head 2, multiple powder discharge grooves 21 are provided at intervals on the outer edge of the drill head 2, the drill head 2 is provided with a front end face 22, and multiple limiting claws 3 are fixed on the outer edge of the drill head 2, the limiting claws 3 are located between adjacent powder discharge grooves 21."

[0004] However, the carbide teeth in that application (equivalent to the drill teeth in this application) are all concentrated at the bottom of the drill bit, and the bottom of the drill bit is roughly flat. Even with a mud discharge groove at the bottom of the drill bit, the effect of discharging mud during the drilling process is still limited. Moreover, during the drilling process, the carbide teeth are generally located at the bottom of the drill bit, and placing the limiting claws on the side of the drill bit is useless for the forward drilling of the drill bit, because the limiting claws located on the side of the drill bit cannot play a role in cutting the ground. Therefore, we propose a multi-claw down-the-hole drill bit. Utility Model Content

[0005] This invention provides a multi-claw down-the-hole drill bit, which has the advantages of high structural strength and large drilling area, and solves the problems mentioned in the background art.

[0006] The technical solution of this utility model is implemented as follows: A multi-claw down-the-hole drill bit is designed, including a base body, the top of which is connected to the drill shank, and the bottom of the base body is provided with multiple protrusions extending outward from its center. Multiple mounting parts are also provided at the bottom of the base body, with the other end of the mounting part extending towards the edge of the base body. Several second drill teeth are provided on one side of the bottom of the protrusions. The central axis of the second drill teeth has a certain acute angle with the rotation plane of the base body, and the end of the second drill teeth is in the same direction as the rotation of the base body. Several third drill teeth are installed at the bottom of both the protrusions and the mounting parts.

[0007] Preferably, the mounting part and the protruding part are integrated into one piece at the end near the center of the bottom surface of the seat.

[0008] Preferably, the end of the protrusion away from the seat body is provided with an inclined surface, the inclined surface is matched with the rotation direction of the seat body, and a first drill tooth is installed on the inclined surface.

[0009] Preferably, a support body is provided on the side of the seat body, corresponding to the protrusion.

[0010] Preferably, the support is a spiral structure.

[0011] Preferably, multiple mounting parts are arranged between the various protrusions.

[0012] Preferably, the protrusion of the second drill tooth is provided with an inclined mounting plane, and the second drill tooth is mounted on the mounting plane.

[0013] Compared with existing technologies, this invention features an extended portion that increases the breaking area, allowing for a larger drill hole diameter. The second drill tooth can also insert into the object's surface at an angle, making it easier to break up the object and increasing the drill bit's drilling speed. Furthermore, the extended portion is more stable and structurally stronger after being supported by the support body. The support body is designed as a helical mechanism, allowing the drilling mud to flow more easily along the surface of the helical support body during drilling. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the bottom structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of one end of the present invention.

[0018] Figure 4 This is a schematic diagram of the structure at the other end of the present invention.

[0019] Figure 5 This is the front view of the present utility model.

[0020] In the diagram: 1. Drill shank; 2. Base; 3. Support; 4. Protrusion; 5. First drill tooth; 6. Mounting part; 7. Inclined surface; 8. Second drill tooth; 9. Mounting plane; 10. Third drill tooth. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Reference Figures 1 to 5 This utility model provides a technical solution: a multi-claw down-the-hole drill bit, including a base body 2, the top of which is connected to a drill shank 1. It should be noted that the improvement in this application is in the drill bit position, while the drill shank 1 is existing technology and no improvement has been made to it. During installation, the drill shank 1 can be installed below the drill rod.

[0023] The drill bit section is described in detail below. Specifically, the base 2 has multiple protrusions 4 extending outwards from its center at its bottom, such as... Figure 1 As shown, the end of the protrusion 4 extends to the outside of the side of the base 2. A mounting surface 9 is provided on one side of the bottom of the protrusion 4. Several second drill teeth 8 are mounted on the mounting surface 9. The number of second drill teeth 8 is at least one row. The central axis of the second drill tooth 8 forms an acute angle with the rotation plane of the base 2, and the end of the second drill tooth 8 rotates in the same direction as the base 2. Figure 4 As shown, the included angle is A, and 10° ≤ included angle 45°. This design is so that when the entire drill bit rotates, the second drill tooth 8 will first come into contact with the object. The second drill tooth 8 will insert into the object at a certain angle, making it easier to crush the object.

[0024] Furthermore, a plurality of mounting portions 6 are provided at the bottom of the base 2, and the plurality of mounting portions 6 are distributed between the various protruding portions 4. The other end of the mounting portion 6 extends toward the edge of the base 2, such as... Figure 2 As shown, the end of the mounting part 6 extends to the edge of the base 2, and several third drill teeth 10 are installed at the bottom of both the protrusion 4 and the mounting part 6. The third drill teeth 10 and the second drill teeth 8 are distributed at the bottom of the drill bit. When the drill bit rotates, the third drill teeth 10 and the second drill teeth 8 work together to break the object. First, the protrusion 4 increases the breaking area, allowing the drill bit to drill a larger diameter hole. Moreover, the second drill teeth 8 can be inserted into the surface of the object at an angle, making it easier to break the object. During the rotary drilling process, the drill bit needs to withstand enormous torque. Therefore, in order to further improve the structural strength of the drill bit, such as... Figure 2 As shown, the mounting part 6 and the protruding part 4 are integrated at one end near the center of the bottom surface of the base 2, which provides better structural strength between the mounting part 6 and the protruding part 4.

[0025] Furthermore, the end of the protrusion 4 away from the base 2 is provided with an inclined surface 7, which matches the rotation direction of the base 2. A first drill tooth 5 is installed on the inclined surface 7. The inclined surface 7 is provided so that the debris at the end of the protrusion 4 can be quickly discharged when the drill bit rotates.

[0026] Furthermore, the side of the seat 2 is provided with a support 3 corresponding to the protrusion 4. The support 3 has a spiral structure, such as... Figure 1 As shown, the tilting direction of the support body 3 is consistent with the force direction of the protrusion 4. The protrusion 4 is more stable and has higher structural strength after being supported by the support body 3. Furthermore, the support body 3 is designed as a spiral mechanism, so that when the drill bit is excavating, the mud can more easily flow along the surface of the spiral structure support body 3. And, as Figure 2 As shown, there is a "V" shaped opening between the protrusion 4 and the mounting part 6, and the mud broken by the drill bit will flow away from the space between the support bodies 3 and the surface of the support body 3, which plays a role in allowing the mud to flow quickly.

[0027] Based on the above embodiments, it should be further noted that the first drill tooth, the second drill tooth, and the third drill tooth are all made of tungsten steel, diamond, or other materials.

[0028] Based on the above embodiments, further optimization is possible: the drill shank 1 and the base 2 are provided with flow holes that penetrate the bottom of the drill bit, and a through hole (such as...) is provided at the bottom of the drill bit. Figure 2 The location indicated by the middle arrow B is used to connect with the drill pipe, allowing lubricant to flow.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. 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 multi-claw down-the-hole drill bit, comprising a base (2), the top of which is connected to a drill shank (1), characterized in that, The bottom of the seat (2) is provided with multiple protrusions (4) extending outward from its center; Multiple mounting parts (6) are also provided at the bottom of the seat (2), and the other end of the mounting part (6) extends toward the edge of the seat (2); The bottom side of the protruding part (4) is provided with several second drill teeth (8), the central axis of the second drill teeth (8) and the rotation plane of the base body (2) have a certain acute angle, and the end of the second drill teeth (8) is in the same direction of rotation as the base body (2); and, Several third drill teeth (10) are installed at the bottom of both the protrusion (4) and the mounting part (6).

2. The multi-jaw down-the-hole drill bit as described in claim 1, characterized in that, The mounting part (6) and the extension part (4) are integrated at one end near the center of the bottom surface of the seat (2).

3. The multi-claw down-the-hole drill bit as described in claim 2, characterized in that, An inclined surface (7) is provided at the end of the protrusion (4) away from the seat (2). The inclined surface (7) matches the rotation direction of the seat (2). A first drill tooth (5) is installed on the inclined surface (7).

4. The multi-jaw down-the-hole drill bit as described in claim 3, characterized in that, The side of the seat (2) is provided with a support (3) located corresponding to the protrusion (4).

5. The multi-claw down-the-hole drill bit as described in claim 4, characterized in that, The support (3) has a spiral structure.

6. The multi-claw down-the-hole drill bit as described in claim 5, characterized in that, Multiple mounting parts (6) are distributed between each extension part (4).

7. The multi-jaw down-the-hole drill bit as described in claim 6, characterized in that, An inclined mounting plane (9) is provided on the protrusion (4) at the second drill tooth (8), and the second drill tooth (8) is mounted on the mounting plane (9).

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