A split drill bit that is easy to replace

Abstract

The utility model discloses a split drill bit that is easy to replace, including a drill tip and a drill shank, a plug-in column is arranged at the bottom of the drill tip, a first thread groove is arranged on the bottom surface of the plug-in column, a plug-in groove is arranged on the top surface of the drill shank, a second thread groove connected to the plug-in groove is arranged on the bottom surface of the drill shank, and the drill tip is plugged into the drill shank and connected by bolts at the bottom. The split drill bit provided by the utility model realizes a quick and stable connection between the drill tip and the drill shank by arranging the plug-in column and the first thread groove at the bottom of the drill tip, as well as the plug-in groove on the top surface of the drill shank and the second thread groove on the bottom surface, so that the user can easily replace the worn parts and reduce material consumption. The design of double thread matching and guide groove simplifies the assembly process and ensures the stability and anti-loosening ability of the connection. In addition, O-rings and spring washers are respectively arranged on the upper and lower sides to further improve the connection stability of the structure.

Description

Technical Field

[0001] The utility model relates to a split drill bit which is easy to replace. Background Art

[0002] Drilling is a common operation in metal processing, construction, engineering and manufacturing. As the main tool for performing drilling operations, the performance of the drill bit directly affects work efficiency, processing quality and cost.

[0003] Traditional drill bits are usually of one-piece design, that is, the drill tip and the drill shank are fixed and inseparable. When the drill tip is worn or damaged, the entire drill needs to be replaced, which not only increases material consumption, but also increases the maintenance cost of the tool. Utility Model Content

[0004] The main purpose of the utility model is to provide a split drill bit that is easy to replace, so as to solve the problems raised in the above-mentioned background technology.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A split drill bit that is easy to replace includes a drill tip and a drill shank, a plug-in column is arranged at the bottom of the drill tip, a first thread groove is arranged on the bottom surface of the plug-in column, a plug-in groove is arranged on the top surface of the drill shank, a second thread groove connected to the plug-in groove is arranged on the bottom surface of the drill shank, the drill tip is inserted into the drill shank and connected at the bottom by bolts.

[0007] The bottom surfaces of the plug-in posts are provided with cutouts along their length direction, and the shape of the plug-in slots is the same as that of the plug-in posts.

[0008] Preferably, the diameter of the first thread groove is smaller than the diameter of the second thread groove.

[0009] Preferably, a first guide groove is provided on the inner side of the first thread groove, and a second guide groove is provided on the inner side of the second thread groove.

[0010] Preferably, the bolt is divided into a first threaded portion, a second threaded portion and a head, a first guide portion is arranged below the first threaded portion, and a second guide portion is arranged between the second threaded portion and the first threaded portion.

[0011] Preferably, a first annular groove is provided on the bottom surface of the head, and a spring washer is provided in the first annular groove.

[0012] Preferably, a second annular groove is provided on the top surface of the drill shank, and an O-ring is provided in the second annular groove.

[0013] Preferably, a pressure plate for squeezing the O-ring is provided on the drill tip.

[0014] Beneficial technical effects of the utility model:

[0015] The split drill bit provided by the utility model realizes a quick and stable connection between the drill tip and the drill shank by providing a plug-in column and a first thread groove at the bottom of the drill tip, as well as a plug-in groove on the top surface of the drill shank and a second thread groove on the bottom surface, so that the user can easily replace the worn parts and reduce material consumption. The design of double thread matching and guide groove simplifies the assembly process and ensures the stability and anti-loosening ability of the connection. In addition, O-rings and spring washers are provided on the upper and lower sides respectively, which further improves the connection stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the drill bit structure of an embodiment of the utility model;

[0017] Figure 2 A cross-sectional view of a drill bit according to an embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the front structure of the drill bit explosion of an embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the drill bit explosion bottom structure of an embodiment of the utility model.

[0020] In the figure: 1, drill tip; 2, drill shank; 3, plug-in column; 4, first thread groove; 5, plug-in groove; 6, second thread groove; 7, bolt; 701, first threaded portion; 702, second threaded portion; 703, head; 704, first guide portion; 705, second guide portion; 8, cutout; 9, first guide groove; 10, second guide groove; 11, first annular groove; 12, spring washer; 13, second annular groove; 14, O-ring; 15, pressure plate. DETAILED DESCRIPTION

[0021] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0022] like Figure 1-Figure 4 As shown, the split drill bit that is easy to replace provided in this embodiment includes a drill tip 1 and a drill shank 2. A plug-in column 3 is provided at the bottom of the drill tip 1, and a first thread groove 4 is provided on the bottom surface of the plug-in column 3. A plug-in groove 5 is provided on the top surface of the drill shank 2. A second thread groove 6 connected to the plug-in groove 5 is provided on the bottom surface of the drill shank 2. The drill tip 1 is plugged into the drill shank 2 and connected at the bottom by a bolt 7, so that a tight connection and quick replacement between the drill tip 1 and the drill shank 2 can be achieved.

[0023] In this embodiment, if Figure 3As shown, cutouts 8 are provided on both sides of the bottom surface of the plug-in column 3 along its length direction, and the shape of the plug-in groove 5 is the same as that of the plug-in column 3 to prevent relative rotation.

[0024] In this embodiment, if Figure 2 As shown, the diameter of the first thread groove 4 is smaller than the diameter of the second thread groove 6, and two specifications of thread grooves are used to improve the connection strength.

[0025] In this embodiment, if Figure 2 As shown, a first guide groove 9 is provided on the inner side of the first thread groove 4, and a second guide groove 10 is provided on the inner side of the second thread groove 6, which helps to guide the bolt 7 to smoothly enter the corresponding thread groove during the assembly process, simplifies the assembly process, and improves the assembly efficiency.

[0026] In this embodiment, if Figure 3 As shown, the bolt 7 is divided into a first threaded portion 701, a second threaded portion 702 and a head 703. A first guide portion 704 is provided below the first threaded portion 701, and a second guide portion 705 is provided between the second threaded portion 702 and the first threaded portion 701, to ensure that the bolt 7 smoothly enters the first thread groove 4 and the second thread groove 6 at one time during the tightening process, to prevent skewing or damage to the thread, and to increase the stability and reliability of the connection.

[0027] In this embodiment, if Figure 3 As shown, a first annular groove 11 is provided on the bottom surface of the head 703, and a spring washer 12 is provided in the first annular groove 11, which can provide additional elasticity when tightening the bolt 7, absorb vibration, prevent loosening, and thus extend the service life of the drill bit.

[0028] In this embodiment, if Figure 3 As shown, the top surface of the drill shank 2 is provided with a second annular groove 13, an O-ring 14 is provided in the second annular groove 13, and a pressing plate 15 for squeezing the O-ring 14 is provided on the drill tip 1 to protect the thread from damage and further improve the connection stability.

[0029] In summary, in this embodiment, the split drill bit provided in this embodiment realizes a quick and stable connection between the drill tip 1 and the drill shank 2 by providing a plug-in column 3 and a first thread groove 4 at the bottom of the drill tip 1, as well as a plug-in groove 5 on the top surface of the drill shank 2 and a second thread groove 6 on the bottom surface, so that the user can easily replace the worn parts and reduce material consumption. The design of double thread matching and guide groove simplifies the assembly process and ensures the stability and anti-loosening ability of the connection. In addition, an O-ring 14 and a spring washer 12 are provided on the upper and lower sides respectively, which further improves the connection stability of the structure.

[0030] The above is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the scope disclosed by the present invention according to the technical solution and concept of the present invention, which fall within the protection scope of the present invention.

Claims

1. A split drill bit that is easy to replace, characterized in that: The drill tip (1) comprises a drill shank (2), wherein a plug-in column (3) is arranged at the bottom of the drill tip (1), a first thread groove (4) is arranged on the bottom surface of the plug-in column (3), a plug-in groove (5) is arranged on the top surface of the drill shank (2), and a second thread groove (6) connected to the plug-in groove (5) is arranged on the bottom surface of the drill shank (2), and the drill tip (1) is plugged into the drill shank (2) and connected at the bottom via a bolt (7).

2. The easily replaceable split drill bit according to claim 1, characterized in that: Notches (8) are provided on both sides of the bottom surface of the plug-in column (3) along its length direction, and the shape of the plug-in slot (5) is the same as that of the plug-in column (3).

3. The easily replaceable split drill bit according to claim 1, characterized in that: The diameter of the first thread groove (4) is smaller than the diameter of the second thread groove (6).

4. The easily replaceable split drill bit according to claim 1, characterized in that: A first guide groove (9) is provided on the inner side of the first thread groove (4), and a second guide groove (10) is provided on the inner side of the second thread groove (6).

5. The easily replaceable split drill bit according to claim 1, characterized in that: The bolt (7) is divided into a first threaded portion (701), a second threaded portion (702) and a head portion (703); a first guide portion (704) is provided below the first threaded portion (701); and a second guide portion (705) is provided between the second threaded portion (702) and the first threaded portion (701).

6. The easily replaceable split drill bit according to claim 5, characterized in that: The bottom surface of the head (703) is provided with a first annular groove (11), and a spring washer (12) is provided in the first annular groove (11).

7. The easily replaceable split drill bit according to claim 1, characterized in that: The top surface of the drill shank (2) is provided with a second annular groove (13), and an O-ring (14) is provided in the second annular groove (13).

8. The easily replaceable split drill bit according to claim 7, characterized in that: A pressing plate (15) for pressing the O-ring (14) is provided on the drill tip (1).

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