Combined drill bit convenient to disassemble

Abstract

The utility model relates to the technical field of drill bits, and discloses a combined drill bit convenient to disassemble, which comprises a rear handle part, a drill bit part and a fixing piece, the drill bit part is installed inside the rear handle part in a separable mode and is fixed by the fixing piece, the rear handle part comprises a rhombic handle, and the left side of the rhombic handle is concentrically and fixedly connected with a connecting sleeve. A connecting hole is formed in the axis of the rhombic handle, a rhombic inner groove is formed in the axis of the connecting sleeve, the connecting hole is communicated with the rhombic inner groove, the drill bit part comprises a drill bit body, and a rhombic pin head is concentrically and fixedly connected to the right end of the drill bit body. According to the combined drill bit convenient to disassemble, a rhombic pin head is inserted into a rhombic inner groove to be limited, then a fixing piece is inserted into a connecting hole to fix the rhombic pin head, and a rhombic handle is connected with an electric tool in the using process, so that the situation that chippings enter the connecting hole to cause difficult disassembly can be effectively avoided; and the effect of convenient disassembly and combination is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a combined drill bit that is easy to disassemble. Background Art

[0002] A drill bit is a tool used to make holes. When it works, a high-speed rotating kinetic energy device drives the drill bit to rotate at high speed, thereby achieving the purpose of drilling.

[0003] Chinese Patent Publication No.: CN 220805601 U discloses "A Combination Drill Bit Easy to Disassemble", in which a shaft body is provided at one end of the drill body, a threaded column penetrating into the inside of the shaft body is fixedly installed at one end of the drill body, a bolt penetrating into the inside of the threaded column from the shaft body is provided on the surface of the shaft body, when the combination drill bit easy to disassemble is used, the bolt is removed first under long-term use of the drill body, and then the threaded column is removed from the inside of the screw hole, and then a new drill body is replaced, in the connection between the threaded column and the threaded hole, the bolt further increases the connectivity between the shaft body and the threaded column, and avoids the threaded column and the threaded hole from falling off during the rotation of the drill body, through this arrangement, the drill bit is more convenient to use, and the replacement cost is reduced when the drill body is damaged.

[0004] The connection structure of the drill bit is arranged on the side of the drill bit. When the drill bit is used for a long time, the debris generated in the drilling will penetrate into the connection hole on the side, making it difficult to disassemble and replace the drill bit.

[0005] It can be seen that there is an urgent need for a combined drill bit that is easy to disassemble to prevent the connection hole from being infiltrated by debris during the drilling process, which makes it difficult to disassemble and replace. Utility Model Content

[0006] The utility model aims to provide a combined drill bit that is easy to disassemble, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a combined drill bit that is easy to disassemble, comprising a rear handle, a drill head and a fixing piece, wherein the drill head is detachably mounted inside the rear handle and fixed by the fixing piece, wherein the rear handle comprises a rhombus handle, wherein a connecting sleeve is concentrically fixedly connected to the left side of the rhombus handle, wherein a connecting hole is provided at the axis of the rhombus handle, wherein a rhombus inner groove is provided at the axis of the connecting sleeve, wherein the connecting hole and the rhombus inner groove are connected;

[0008] The drill head comprises a drill body, the right end of which is concentrically fixedly connected with a diamond pin, and the right side axis of the diamond pin is provided with a connecting thread groove;

[0009] The rhombus pin head is inserted into the interior of the rhombus inner groove, and the fixing piece passes through the connecting hole and is threadedly connected to the connecting thread groove.

[0010] Preferably, the length of the diamond-shaped pin head is equal to the depth of the diamond-shaped inner groove, and the outer surface of the diamond-shaped pin head is completely fitted with the inner wall of the diamond-shaped inner groove.

[0011] Preferably, a limiting circular groove is provided on the outer surface of the diamond-shaped pin head, and an elastic bead with elasticity is installed on the inner wall of the diamond-shaped inner groove, and the elastic bead is adapted to the position of the limiting circular groove.

[0012] Preferably, the number of the limiting circular grooves is the same as the number of faces of the rhombus pin head, and the positions of the elastic beads correspond one-to-one to the positions of the limiting circular grooves.

[0013] Preferably, the fixing member comprises a cylindrical metal rod, one end of the cylindrical metal rod is fixedly connected to a threaded rod, and the other end of the cylindrical metal rod is provided with a hexagonal socket.

[0014] Preferably, the length of the cylindrical metal rod is greater than half the length of the rhombus handle, and the length of the cylindrical metal rod does not exceed the length of the rhombus handle.

[0015] Preferably, the outer surface of the cylindrical metal rod is completely in contact with the inner wall of the connecting hole.

[0016] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0017] First, the utility model limits the position of the diamond pin head by inserting it into the diamond inner groove, and then fixes the diamond pin head by inserting the fixing piece from the connecting hole. During use, the diamond handle is connected to the electric tool, which can effectively prevent debris from entering the connecting hole and making it difficult to disassemble, thereby achieving the effect of convenient disassembly and assembly.

[0018] Second, the utility model installs elastic beads on the inner wall of the diamond inner groove and opens a limiting circular groove on the outer surface of the diamond pin head, so that the elastic beads bounce into the limiting circular groove to pre-fix the diamond pin head, thereby facilitating the installation of the fixing part.

[0019] Third, the utility model sets the length of the fixing piece so that the fixing piece fills the connecting hole to increase the strength of the diamond handle, thereby improving the torsional resistance of the diamond handle when drilling and avoiding the reduction of the strength of the diamond handle due to the opening of the connecting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2It is the structural assembly drawing of the utility model;

[0022] Figure 3 This is a cross-sectional view of the connection of the structure of the utility model;

[0023] Figure 4 It is a schematic diagram of the rear handle structure of the utility model.

[0024] Among them: 1. rear handle; 101. diamond handle; 102. connecting sleeve; 103. connecting hole; 104. diamond inner groove; 105. elastic bead; 2. drill head; 201. drill body; 202. diamond pin head; 203. connecting thread groove; 204. limiting circular groove; 3. fixing part. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-4 A combined drill bit that is easy to disassemble comprises a rear handle 1, a drill head 2 and a fixing member 3. The drill head 2 is detachably mounted inside the rear handle 1 and fixed by the fixing member 3. The rear handle 1 comprises a rhombus handle 101. A connecting sleeve 102 is fixedly connected to the left side of the rhombus handle 101 concentrically. A connecting hole 103 is formed at the axis of the rhombus handle 101. A rhombus inner groove 104 is formed at the axis of the connecting sleeve 102. The connecting hole 103 and the rhombus inner groove 104 are connected.

[0027] The drill head 2 comprises a drill body 201, a diamond pin 202 is coaxially fixedly connected to the right end of the drill body 201, and a connecting thread groove 203 is formed on the right axis of the diamond pin 202;

[0028] The rhombus-shaped pin head 202 is inserted into the inside of the rhombus-shaped inner groove 104 , and the fixing member 3 passes through the connecting hole 103 and is threadedly connected with the connecting thread groove 203 .

[0029] Through the above technical solution, the diamond pin head 202 is inserted into the inside of the diamond inner groove 104 for limiting, and then the fixing piece 3 is inserted from the connecting hole 103 to fix the diamond pin head 202. During use, the diamond handle 101 is connected to the power tool, thereby effectively preventing debris from entering the inside of the connecting hole 103 and causing difficulty in disassembly, thereby achieving the effect of facilitating disassembly and assembly.

[0030] Specifically, the length of the diamond-shaped pin head 202 is equal to the depth of the diamond-shaped inner groove 104 , and the outer surface of the diamond-shaped pin head 202 is completely fitted with the inner wall of the diamond-shaped inner groove 104 .

[0031] Through the above technical solution, the length and diameter of the diamond pin 202 are set, so as to avoid the gap between the diamond pin 202 and the diamond inner groove 104 after being plugged in, so as to avoid eccentric shaking during the drilling process of the drill body 201.

[0032] Specifically, a limiting circular groove 204 is provided on the outer surface of the diamond-shaped pin head 202 , and an elastic bead 105 with elasticity is installed on the inner wall of the diamond-shaped inner groove 104 , and the elastic bead 105 is matched with the position of the limiting circular groove 204 .

[0033] Through the above technical solution, an elastic bead 105 is installed on the inner wall of the diamond inner groove 104, and a limiting circular groove 204 is opened on the outer surface of the diamond pin head 202, so that the elastic bead 105 bounces into the limiting circular groove 204 to pre-fix the diamond pin head 202, so as to facilitate the installation of the fixing part 3.

[0034] Specifically, the number of the limiting circular grooves 204 is the same as the number of faces of the rhombus pin head 202 , and the positions of the elastic beads 105 correspond one to one with the positions of the limiting circular grooves 204 .

[0035] Through the above technical solution, the number of limiting circular grooves 204 and elastic beads 105 is set, so that the support and limiting capacity can be effectively improved, thereby improving the stability of the drill body 201 during operation.

[0036] Specifically, the fixing member 3 comprises a cylindrical metal rod, one end of which is fixedly connected to a threaded rod, and the other end of which is provided with a hexagonal socket.

[0037] Through the above technical solution, the cylindrical metal rod cooperates with the hexagonal socket to facilitate the tool to rotate the threaded rod, thereby connecting the connecting sleeve 102 and the diamond pin head 202 together.

[0038] Specifically, the length of the cylindrical metal rod is greater than half of the length of the diamond-shaped handle 101 , and the length of the cylindrical metal rod does not exceed the length of the diamond-shaped handle 101 .

[0039] Through the above technical solution, the length of the fixing member 3 is set so that the fixing member 3 fills the connecting hole 103 to increase the strength of the diamond handle 101, thereby improving the torsional resistance of the diamond handle 101 when drilling, and avoiding the reduction of the strength of the diamond handle 101 due to the opening of the connecting hole 103.

[0040] Specifically, the outer surface of the cylindrical metal rod is completely in contact with the inner wall of the connecting hole 103 .

[0041] Through the above technical solution, the diameter of the cylindrical metal rod is set, so as to avoid a gap between the cylindrical metal rod and the connecting hole 103, and the strength of the diamond handle 101 is improved by filling the gap.

[0042] When in use, the diamond pin head 202 is inserted into the diamond inner groove 104 for limiting, and then the fixing member 3 is inserted from the connecting hole 103 to fix the diamond pin head 202. During use, the diamond handle 101 is connected to the electric tool, so that debris can be effectively prevented from entering the connecting hole 103 to make it difficult to disassemble, thereby achieving the effect of facilitating disassembly and assembly;

[0043] By installing an elastic bead 105 on the inner wall of the diamond inner groove 104 and opening a limiting circular groove 204 on the outer surface of the diamond pin head 202, the elastic bead 105 is ejected into the limiting circular groove 204 to pre-fix the diamond pin head 202, so as to facilitate the installation of the fixing member 3;

[0044] By setting the length of the fixing member 3, the fixing member 3 fills the connecting hole 103 to increase the strength of the diamond handle 101, thereby improving the torsional resistance of the diamond handle 101 when drilling and avoiding the reduction of the strength of the diamond handle 101 due to the opening of the connecting hole 103.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined drill bit that is easy to disassemble, comprising a rear shank (1), a drill head (2) and a fixing member (3), wherein the drill head (2) is detachably mounted inside the rear shank (1) and fixed by the fixing member (3), characterized in that: The rear handle (1) comprises a rhombus-shaped handle (101), a connecting sleeve (102) is coaxially fixedly connected to the left side of the rhombus-shaped handle (101), a connecting hole (103) is provided at the axis of the rhombus-shaped handle (101), a rhombus-shaped inner groove (104) is provided at the axis of the connecting sleeve (102), and the connecting hole (103) and the rhombus-shaped inner groove (104) are connected; The drill head (2) comprises a drill body (201), the right end of the drill body (201) is coaxially fixedly connected with a rhombus pin (202), and the right side axis of the rhombus pin (202) is provided with a connecting thread groove (203); The diamond-shaped pin head (202) is inserted into the interior of the diamond-shaped inner groove (104), and the fixing member (3) passes through the connecting hole (103) and is threadedly connected to the connecting thread groove (203).

2. The easily disassembled combined drill bit according to claim 1, characterized in that: The length of the diamond-shaped pin head (202) is equal to the depth of the diamond-shaped inner groove (104), and the outer surface of the diamond-shaped pin head (202) is completely in contact with the inner wall of the diamond-shaped inner groove (104).

3. The easily disassembled combined drill bit according to claim 1, characterized in that: The outer surface of the diamond-shaped pin head (202) is provided with a limiting circular groove (204), and the inner wall of the diamond-shaped inner groove (104) is provided with an elastic bead (105) having elasticity, and the elastic bead (105) is matched with the position of the limiting circular groove (204).

4. The easily disassembled combined drill bit according to claim 3, characterized in that: The number of the limiting circular grooves (204) is the same as the number of faces of the rhombus pin head (202), and the positions of the elastic beads (105) correspond one to one to the positions of the limiting circular grooves (204).

5. The easily disassembled combined drill bit according to claim 1, characterized in that: The fixing member (3) comprises a cylindrical metal rod, one end of which is fixedly connected to a threaded rod, and the other end of which is provided with a hexagonal socket.

6. The easily disassembled combined drill bit according to claim 5, characterized in that: The length of the cylindrical metal rod is greater than half the length of the rhombus handle (101), and the length of the cylindrical metal rod does not exceed the length of the rhombus handle (101).

7. The easily disassembled combined drill bit according to claim 5, characterized in that: The outer surface of the cylindrical metal rod is completely in contact with the inner wall of the connecting hole (103).

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