An adjustable drilling angle rotary drill bit

Abstract

The utility model relates to the technical field of rotary drilling head, and disclose adjustable drilling angle's rotary drilling head. This adjustable drilling angle's rotary drilling head, including drill bit body, first drill tooth and second drill tooth, the bottom fixedly connected with the first drill tooth of annular array distribution of drill bit body, the outside of drill bit body lower extreme is offered with the installation hole that is annular array distribution and with inside intercommunication, the inside of installation hole all is fixedly connected with the shaft that extends to the inside of drill bit body, this device have adjustable drilling angle, strong adaptability, adjustment convenient and so on advantage, solved the traditional rotary drilling head drill tooth drilling angle unadjustable, lead to face different hardness, bedding structure's rock and soil, cannot optimal rock breaking, in turn lead to drilling efficiency reduction and, and if need to change drilling angle, must dismantle drill bit and re -weld or install, time -consuming and labor -intensive and influence construction progress's problem.

Description

Technical Field

[0001] This utility model relates to the field of rotary drilling bit technology, specifically a rotary drilling bit with an adjustable drilling angle. Background Technology

[0002] Traditional rotary drilling bits typically have their drill teeth or cutting plates fixedly welded or riveted to the bit body, and their drilling angle is not adjustable. This means that when facing rocks and soils with different hardness and bedding structures, the fixed-angle drill teeth may not be able to break the rock optimally, reducing drilling efficiency and increasing adjustment costs. If the drilling angle needs to be changed, the drill bit must be disassembled and re-welded or reinstalled, which is time-consuming, labor-intensive, and affects the construction progress.

[0003] In the prior art, such as the announcement number CN213175524U, a rotary drilling rig drill bit is proposed. The installation angles of the first and second drill teeth in this prior art are both fixed, which results in the drill tooth drilling angle being unadjustable, leading to poor adaptability.

[0004] In summary, a rotary drilling bit with an adjustable drilling angle is proposed to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides an adjustable drilling angle rotary drill bit, which has the advantages of adjustable drilling angle, strong adaptability, and convenient adjustment. It solves the problems of traditional rotary drill bits having non-adjustable drilling angles, which makes it impossible to optimally break rocks with different hardness and bedding structures, resulting in reduced drilling efficiency. Furthermore, if the drilling angle needs to be changed, the drill bit must be disassembled and re-welded or reinstalled, which is time-consuming, labor-intensive, and affects the construction progress.

[0007] (II) Technical Solution

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rotary drilling bit with an adjustable drilling angle includes a drill bit body, a first drill tooth, and a second drill tooth. The bottom of the drill bit body is fixedly connected to the first drill tooth arranged in a circular array. The outer side of the lower end of the drill bit body is provided with mounting holes arranged in a circular array and communicating with the interior of the first drill tooth. The interior of each mounting hole is fixedly connected to a mounting shaft extending into the interior of the drill bit body. The outer side of the opposite end of each mounting shaft is provided with a drill tooth bearing assembly rotatably connected to it and located inside the drill bit body. The bottom of each drill tooth bearing assembly is provided with a second drill tooth arranged at equal intervals. The opposite end of each mounting shaft is provided with a second drill tooth. An auxiliary limiting component that adapts to and extends into the drill bit bearing assembly is installed in the mounting hole. The drill bit bearing assembly has a common cylindrical shell on opposite sides. The cylindrical shell has an interconnected upper cavity and a lower cavity inside. The bottom of the cylindrical shell has a circular groove that communicates with the lower cavity. The upper cavity and the lower cavity have the same angle adjustment component that meshes with the opposite side of the drill bit bearing assembly. The top wall of the upper cavity and the space between the upper cavity and the lower cavity have threaded holes that are distributed in a ring array and are mutually adapted. The threaded holes are all adapted to the angle adjustment component. The circular groove has a main limiting component that passes through the threaded holes and the angle adjustment component.

[0009] The beneficial effects of this utility model are:

[0010] This adjustable rotary drill bit allows for adjustment of the drilling angle of the second drill tooth by rotating the angle adjustment component with a hex wrench, which in turn rotates the drill tooth bearing component. The main limiting component is then inserted into the circular groove and threaded through the angle adjustment component to the threaded hole, thus fixing the second drill tooth after the drilling angle is adjusted. Finally, the auxiliary limiting component is tightened to further secure the drill tooth bearing component, improving the reliability of the second drill tooth's fixation after the drilling angle is adjusted. This design offers advantages such as adjustable drilling angle, strong adaptability, and convenient adjustment.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the angle adjustment assembly includes a disc-shaped shaft, a second bevel gear, a through hole, and an internal hexagonal hole. The disc-shaped shaft extending to the top wall of the upper cavity is rotatably connected inside the lower cavity. A second bevel gear, which is symmetrically distributed vertically and located inside the upper cavity and meshes with the first bevel gear, is fixedly connected to the outside of the disc-shaped shaft. The outer surface of the disc-shaped shaft has through holes that are adapted to the threaded holes. The bottom of the disc-shaped shaft has an internal hexagonal hole.

[0013] Furthermore, the drill bit bearing assembly includes a bearing column and a first bevel gear. The outer side of the opposite end of the mounting shaft is provided with a bearing column that is rotatably connected to it and located inside the drill bit body. The opposite end of the bearing column is rotatably connected to the same columnar shell. The opposite end of the bearing column is fixedly connected to a first bevel gear that extends into the cavity of the columnar shell. The bottom of the bearing column is fixedly connected to second drill teeth that are evenly distributed.

[0014] The beneficial effect of adopting the above-mentioned further solution is that by inserting a hexagonal wrench into the internal hexagonal hole to rotate the disc-shaped shaft, the second bevel gear is rotated. Since the second bevel gear meshes with the first bevel gear, the bearing column can be rotated synchronously, thereby adjusting the drilling angle of the second drill tooth. After the drilling angle of the second drill tooth is adjusted, the through hole and the threaded hole are aligned.

[0015] Furthermore, the main limiting component includes a bottom cover and a second bolt. The bottom cover is adapted to the circular groove. The bottom of the bottom cover is threadedly connected to a second bolt that is distributed in a ring array and passes through the through hole and is threadedly connected to the threaded hole.

[0016] The beneficial effect of adopting the above-mentioned further solution is that by installing the bottom cover into the circular groove, the second bolt passes through the through hole and is threadedly connected to the threaded hole. By tightening all the second bolts, the second drill tooth after adjusting the drilling angle can be fixed.

[0017] Furthermore, the auxiliary limiting component includes a first bolt and a contact cone. The opposite ends of the mounting shaft are threaded with a first bolt that is adapted to the mounting hole and extends into the interior of the bearing column. The opposite side of the first bolt is fixedly connected with a contact cone that is adapted to the conical cavity inside the bearing column. The outer side of the contact cone is roughened.

[0018] The beneficial effect of adopting the above-mentioned further solution is that by tightening the first bolts in sequence, the contact cone head is driven to fit tightly with the conical cavity inside the bearing column, further fixing the bearing column and improving the stability of the second drill tooth after adjusting the drilling angle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a partial sectional view of the drill bit body of this utility model from below;

[0021] Figure 3 This is an enlarged schematic diagram of the structure at point a of this utility model;

[0022] Figure 4 This is a cross-sectional view of the columnar shell structure of this utility model.

[0023] In the diagram: 1. Drill bit body; 2. First drill tooth; 3. Second drill tooth; 4. Mounting hole; 5. Mounting shaft; 6. Drill tooth bearing assembly; 601. Bearing column; 602. First bevel gear; 7. Auxiliary limiting assembly; 701. First bolt; 702. Contact cone; 8. Columnar shell; 9. Upper cavity; 10. Lower cavity; 11. Circular groove; 12. Angle adjustment assembly; 121. Disc shaft; 122. Second bevel gear; 123. Through hole; 124. Internal hexagonal hole; 13. Threaded hole; 14. Main limiting assembly; 141. Bottom cover; 142. Second bolt. Detailed Implementation

[0024] 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.

[0025] In the embodiments, by Figure 1-4 This invention discloses an adjustable rotary drilling bit, comprising a drill bit body 1, first drill teeth 2, and second drill teeth 3. The bottom of the drill bit body 1 is fixedly connected to the first drill teeth 2 arranged in a circular array. The outer side of the lower end of the drill bit body 1 has mounting holes 4 arranged in a circular array and communicating with the interior of the drill bit body 1. Each mounting hole 4 has a mounting shaft 5 fixedly connected to it, extending into the interior of the drill bit body 1. Each opposite end of the mounting shaft 5 has a drill tooth bearing assembly 6 rotatably connected to it and located inside the drill bit body 1. The bottom of each drill tooth bearing assembly 6 has second drill teeth 3 arranged at equal intervals. The opposite end of each mounting shaft 5 has a part that fits the mounting hole 4 and extends into the drill tooth bearing assembly 6. The internal auxiliary limiting component 7 and the drill tooth bearing component 6 are provided with the same cylindrical shell 8 on the opposite side. The cylindrical shell 8 has an upper cavity 9 and a lower cavity 10 that are interconnected. The bottom of the cylindrical shell 8 has a circular groove 11 that communicates with the lower cavity 10. The upper cavity 9 and the lower cavity 10 are provided with the same angle adjustment component 12 that meshes with the opposite side of the drill tooth bearing component 6. The inner top wall of the upper cavity 9 and the space between the upper cavity 9 and the lower cavity 10 are provided with threaded holes 13 that are distributed in a ring array and are adapted to each other. The threaded holes 13 are adapted to the angle adjustment component 12. The circular groove 11 has a main limiting component 14 that passes through the threaded holes 13 and the angle adjustment component 12.

[0026] The angle adjustment assembly 12 includes a disc-shaped shaft 121, a second bevel gear 122, a through hole 123, and an internal hexagonal hole 124. The disc-shaped shaft 121, which extends to the top wall of the upper cavity 9, is rotatably connected inside the lower cavity 10. The outer side of the disc-shaped shaft 121 is fixedly connected to a second bevel gear 122 that is symmetrically distributed vertically and located inside the upper cavity 9 and meshes with the first bevel gear 602. The outer disc surface of the disc-shaped shaft 121 is provided with a through hole 123 that is adapted to the threaded hole 13. The bottom of the disc-shaped shaft 121 is provided with an internal hexagonal hole 124.

[0027] The drill bit support assembly 6 includes a support column 601 and a first bevel gear 602. The outer side of the opposite end of the mounting shaft 5 is provided with a support column 601 that is rotatably connected to it and located inside the drill bit body 1. The opposite end of the support column 601 is rotatably connected to the same column shell 8. The opposite end of the support column 601 is fixedly connected to a first bevel gear 602 that extends into the cavity 9 of the column shell 8. The bottom of the support column 601 is fixedly connected to second drill teeth 3 that are evenly distributed.

[0028] Insert the hexagonal wrench into the internal hexagonal hole 124 and rotate the disc shaft 121, which in turn drives the second bevel gear 122 to rotate. Since the second bevel gear 122 meshes with the first bevel gear 602, it can drive the bearing column 601 to rotate synchronously, thereby adjusting the drilling angle of the second drill tooth 3. After the drilling angle of the second drill tooth 3 is adjusted, the through hole 123 is aligned with the threaded hole 13.

[0029] The main limiting assembly 14 includes a bottom cover 141 and a second bolt 142. The bottom cover 141 is adapted to the circular groove 11. The bottom of the bottom cover 141 is threadedly connected to the second bolt 142, which is distributed in a ring array and passes through the through hole 123 and is threadedly connected to the threaded hole 13.

[0030] Insert the bottom cover 141 into the circular groove 11, so that the second bolt 142 passes through the through hole 123 and is threaded into the threaded hole 13. Tighten all the second bolts 142 to fix the second drill tooth 3 after adjusting the drilling angle.

[0031] The auxiliary limiting component 7 includes a first bolt 701 and a contact cone 702. The opposite ends of the mounting shaft 5 are threaded with a first bolt 701 that is adapted to the mounting hole 4 and extends into the interior of the bearing column 601. The opposite side of the first bolt 701 is fixedly connected with a contact cone 702 that is adapted to the conical cavity inside the bearing column 601. The outer side of the contact cone 702 is roughened.

[0032] Tighten the first bolt 701 in sequence, which in turn causes the contact cone 702 to fit tightly into the conical cavity inside the bearing column 601, further fixing the bearing column 601 and improving the stability of the second drill tooth 3 after adjusting the drilling angle.

[0033] Working principle:

[0034] Step 1: Insert the hex wrench into the internal hexagonal hole 124 and rotate the disc shaft 121, which in turn drives the second bevel gear 122 to rotate. Since the second bevel gear 122 meshes with the first bevel gear 602, it can drive the bearing column 601 to rotate synchronously, thereby adjusting the drilling angle of the second drill tooth 3. After the drilling angle of the second drill tooth 3 is adjusted, the through hole 123 is aligned with the threaded hole 13.

[0035] Step 2: Insert the bottom cover 141 into the circular groove 11, so that the second bolt 142 passes through the through hole 123 and is threaded into the threaded hole 13. Tighten all the second bolts 142 to fix the second drill tooth 3 after adjusting the drilling angle.

[0036] Step 3: Tighten the first bolt 701 in sequence, which will cause the contact cone 702 to fit tightly into the conical cavity inside the bearing column 601, further fixing the bearing column 601 and improving the stability of the second drill tooth 3 after adjusting the drilling angle.

[0037] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] 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. A rotary drilling bit with an adjustable drilling angle, comprising a bit body (1), a first drill tooth (2) and a second drill tooth (3), characterized in that: The bottom of the drill bit body (1) is fixedly connected with first drill teeth (2) arranged in a circular array. The outer side of the lower end of the drill bit body (1) is provided with mounting holes (4) arranged in a circular array and communicating with the interior of the mounting holes (4). Each mounting hole (4) is fixedly connected with a mounting shaft (5) extending into the drill bit body (1). Each mounting shaft (5) has a drill tooth bearing assembly (6) rotatably connected to and located inside the drill bit body (1) on its opposite side. The bottom of each drill tooth bearing assembly (6) is provided with second drill teeth (3) arranged at equal intervals. Each mounting shaft (5) has an auxiliary limiting assembly (7) adapted to the mounting holes (4) and extending into the drill tooth bearing assembly (6). The opposite side of the drill tooth bearing assembly (6) is provided with... There is a common cylindrical shell (8), and the interior of the cylindrical shell (8) is provided with an upper cavity (9) and a lower cavity (10) that are interconnected. The bottom of the cylindrical shell (8) is provided with a circular groove (11) that communicates with the lower cavity (10). The interior of the upper cavity (9) and the lower cavity (10) is provided with the same angle adjustment component (12) that meshes with the opposite side of the drill bit bearing component (6). The top wall of the inner cavity of the upper cavity (9) and between the upper cavity (9) and the lower cavity (10) are provided with threaded holes (13) that are distributed in a ring array and are adapted to each other. The threaded holes (13) are adapted to the angle adjustment component (12). The interior of the circular groove (11) is provided with a main limiting component (14) that passes through the threaded hole (13) and the angle adjustment component (12).

2. The rotary drilling bit with adjustable drilling angle according to claim 1, characterized in that: The drill bit bearing assembly (6) includes a bearing column (601) and a first bevel gear (602). The bearing column (601) is rotatably connected to the outer side of the opposite end of the mounting shaft (5) and located inside the drill bit body (1). The same column shell (8) is rotatably connected to the opposite end of the bearing column (601). The first bevel gear (602) extending into the cavity (9) of the column shell (8) is fixedly connected to the opposite end of the bearing column (601). The bottom of the bearing column (601) is fixedly connected to the second drill teeth (3) that are evenly distributed.

3. The rotary drilling bit with adjustable drilling angle according to claim 2, characterized in that: The auxiliary limiting component (7) includes a first bolt (701) and a contact cone (702). The opposite ends of the mounting shaft (5) are threaded with a first bolt (701) that is adapted to the mounting hole (4) and extends into the interior of the bearing column (601). The opposite side of the first bolt (701) is fixedly connected with a contact cone (702) that is adapted to the conical cavity inside the bearing column (601). The outer side of the contact cone (702) is roughened.

4. The rotary drilling bit with adjustable drilling angle according to claim 2, characterized in that: The angle adjustment assembly (12) includes a disc shaft (121), a second bevel gear (122), a through hole (123), and an internal hexagonal hole (124). The lower cavity (10) is rotatably connected to the disc shaft (121) which extends to the top wall of the upper cavity (9). The outer side of the disc shaft (121) is fixedly connected to a second bevel gear (122) which is symmetrically distributed vertically and located inside the upper cavity (9) and meshes with the first bevel gear (602). The outer surface of the disc shaft (121) is provided with a through hole (123) that is compatible with the threaded hole (13). The bottom of the disc shaft (121) is provided with an internal hexagonal hole (124).

5. The rotary drilling bit with adjustable drilling angle according to claim 4, characterized in that: The main limiting component (14) includes a bottom cover (141) and a second bolt (142). The bottom cover (141) is adapted to the circular groove (11). The bottom of the bottom cover (141) is threadedly connected to the second bolt (142) which is distributed in a ring array and threadedly connected to the through hole (123) and the threaded hole (13).

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