Cold twist drill with drill bit convenient to replace

Abstract

The cold twist drill comprises the drill bit and a drill bit mounting seat, a first connecting sleeve is arranged above the drill bit, a second connecting sleeve is arranged below the drill bit mounting seat, a first mounting column is arranged at the top of the drill bit, and a limiting groove is formed in the inner side of the bottom of the first connecting sleeve. A first mounting column is arranged in the first connecting sleeve, a second mounting column is arranged at the bottom of the drill bit mounting seat, a threaded column is arranged at the bottom of the second mounting column, and a threaded groove is formed in the second connecting sleeve, and when the drill bit is mounted, the first mounting column is mounted in the first connecting sleeve and connected with the threaded column through the threaded groove, so that the second connecting sleeve is connected with the drill bit mounting seat; and on the contrary, the cold twist drill is convenient to disassemble and assemble, and is fixed on the drill bit mounting seat through threads, so that a better mounting effect is achieved, and the condition of mounting position deviation or mounting looseness can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of twist drills, in particular to a cold twist drill which is convenient for replacing a drill bit. Background Art

[0002] A cold twist drill is a tool used for drilling holes in metal and other materials. It features one or two spirally intersecting holes between the drill's shank and the cutting edge. These holes can be used to cool the tool and workpiece and help flush away chips by passing compressed air, oil, or cutting fluid. Cold twist drills are particularly well-suited for deep-hole, high-speed machining because they maintain a lower cutting temperature during the drilling process, reducing tool wear and extending tool life.

[0003] After long-term use, existing cold twist drills usually need to be cleaned and maintained, which requires the cold twist drills to be disassembled. However, the current cold twist drills are usually troublesome to disassemble and assemble, and the current cold twist drills are usually fixed by a clamping mechanism. During installation, the installation position may be offset or the installation may be loose, thereby affecting use. Utility Model Content

[0004] The purpose of the utility model is to provide a cold twist drill which is convenient for replacing the drill bit, so as to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A cold twist drill for easy drill bit replacement includes a drill body and a drill mounting seat. A first connecting sleeve is provided above the drill body, and a second connecting sleeve is provided below the drill mounting seat. The first connecting sleeve and the second connecting sleeve are hollow in design. A first mounting column is provided on the top of the drill body, and a limiting groove is provided on the inner side of the bottom of the first connecting sleeve. The first mounting column is clamped in the limiting groove. A second mounting column is provided at the bottom of the drill mounting seat, and a threaded column is provided at the bottom of the second mounting column. A threaded groove is provided inside the second connecting sleeve, and the threaded groove is threadedly connected to the threaded column.

[0007] In a preferred embodiment of the present invention, a hexagonal opening is provided on the top of the first mounting column, a hexagonal bolt is provided on the bottom of the threaded column, and the hexagonal bolt is slidably connected to the hexagonal opening.

[0008] In a preferred embodiment of the present invention, clamping grooves are provided on both sides of the limiting groove, and clamping blocks are provided on both sides of the bottom of the first mounting column, and the clamping blocks are slidably connected to the clamping grooves.

[0009] In a preferred embodiment of the present invention, a limiting ring is provided on the outer side of the top of the first connecting sleeve, and an annular groove is provided on the inner side of the bottom of the second connecting sleeve, and the limiting ring is movably connected to the annular groove.

[0010] In a preferred embodiment of the present invention, screw holes are provided on both sides of the top of the second connecting sleeve, bolts are provided inside the screw holes, and the bolts are threadedly connected to the screw holes.

[0011] In a preferred embodiment of the present invention, a latch is provided on the inner side of the bolt, and bayonet holes are provided on both sides of the second mounting column, and the latch is movably connected to the bayonet holes.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention.

[0013] Beneficial effect: When the drill bit is installed, the first mounting column is installed in the first connecting sleeve and is clamped on the clamping groove through the clamping block to clamp the drill bit. The threaded column is connected through the threaded groove, so that the second connecting sleeve is connected to the drill bit mounting seat. When connecting, the hexagonal port is connected through the hexagonal bolt, so that the drill bit is connected to the drill bit mounting seat, thereby completing the assembly of the cold twist drill. Conversely, it is convenient to disassemble. This structure is relatively easy to assemble and disassemble, and is fixed to the drill bit mounting seat through threads, thereby achieving a better installation effect, and can effectively avoid the installation position offset or loose installation.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the following is a detailed description of the preferred embodiments of the present invention with the accompanying drawings. The specific implementation methods of the present invention are given in detail in the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the main structure of a cold twist drill that is easy to replace the drill bit;

[0017] Figure 2 This is a schematic diagram of the connection structure between the drill bit and the drill bit mounting base in a cold twist drill that facilitates drill bit replacement;

[0018] Figure 3 This is a schematic diagram of the structure of the first connecting sleeve in a cold twist drill that facilitates drill bit replacement;

[0019] Figure 4This is a schematic diagram of the structure of the second connecting sleeve in a cold twist drill that facilitates drill bit replacement.

[0020] In the figure: 1. drill body; 11. first mounting post; 12. hexagonal opening; 13. clamping block; 2. drill mounting base; 21. second mounting post; 22. threaded post; 23. hexagonal bolt; 24. clamping socket; 3. first connecting sleeve; 31. limiting groove; 32. clamping slot; 33. limiting ring; 34. annular groove; 4. second connecting sleeve; 41. threaded groove; 42. screw mouth; 43. bolt; 44. clamping bolt. DETAILED DESCRIPTION

[0021] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0022] Example 1:

[0023] Please refer to Figures 1-4 The utility model provides a cold twist drill for easy replacement of drill bits, comprising a drill body 1 and a drill mounting seat 2. The drill body 1 is the main body of the cold twist drill, the drill mounting seat 2 is the mounting structure of the cold twist drill, and drives the cold twist drill to rotate. A first connecting sleeve 3 is provided above the drill body 1, and a second connecting sleeve 4 is provided below the drill mounting seat 2. The first connecting sleeve 3 and the second connecting sleeve 4 are hollow in design. The first connecting sleeve 3 and the second connecting sleeve 4 are a connecting structure, that is, the drill body 1 and the drill mounting seat 2 are connected and installed through the first connecting sleeve 3 and the second connecting sleeve 4, thereby completing the assembly of the cold twist drill. A first mounting column 11 is provided on the top of the drill body 1, and a second mounting column 21 is provided at the bottom of the drill mounting seat 2. The first mounting column 11 is the mounting structure of the drill body 1, and the second mounting column 21 is the mounting structure of the drill mounting seat 2.

[0024] The limiting ring 33 is provided on the outer side of the top of the first connecting sleeve 3, and the annular groove 34 is provided on the inner side of the bottom of the second connecting sleeve 4. The limiting ring 33 is movably connected to the annular groove 34, that is, the limiting ring 33 is clamped on the annular groove 34 and moves, so that the second connecting sleeve 4 is connected to the first connecting sleeve 3, and the second connecting sleeve 4 can rotate. A limiting groove 31 is provided on the inner side of the bottom of the first connecting sleeve 3, and clamping grooves 32 are provided on both sides of the limiting groove 31. Blocks 13 are provided on both sides of the bottom of the first mounting column 11, and the clamping block 13 is slidably connected to the clamping groove 32. When the drill body 1 is installed, the drill body 1 is inserted from above the second connecting sleeve 4, so that the first mounting column 11 is clamped on the limiting groove 31, that is, the first mounting column 11 is installed in the first connecting sleeve 3, and is clamped on the clamping groove 32 by the clamping block 13, thereby clamping the drill body 1.

[0025] The bottom of the second mounting post 21 is provided with a threaded post 22, and the inside of the second connecting sleeve 4 is provided with a threaded groove 41, and the threaded groove 41 is threadedly connected to the threaded post 22, and the top of the first mounting post 11 is provided with a hexagonal mouth 12, and the bottom of the threaded post 22 is provided with a hexagonal bolt 23, and the hexagonal bolt 23 is slidably connected to the hexagonal mouth 12, that is, the bottom of the drill mounting seat 2 is docked through the second connecting sleeve 4, and the threaded post 22 is connected through the threaded groove 41, so that the second connecting sleeve 4 is connected to the drill mounting seat 2, and when connecting, the hexagonal mouth 12 is connected through the hexagonal bolt 23, and the second connecting sleeve 4 is rotated on the first connecting sleeve 3, so that the drill body 1 is connected to the drill mounting seat 2, thereby completing the assembly of the cold twist drill, and the thread direction of the threaded groove 41 is opposite to the rotation direction of the cold twist drill, thereby ensuring that the cold twist drill will not fall off during use, otherwise it is convenient to disassemble, and the structure is relatively convenient to disassemble and assemble.

[0026] Example 2:

[0027] Please refer to Figure 2 、 Figure 4 , screw holes 42 are provided on both sides of the top of the second connecting sleeve 4, and bolts 43 are provided inside the screw holes 42. The bolts 43 are threadedly connected to the screw holes 42, and a clamping bolt 44 is provided on the inside of the bolt 43. Bayonet holes 24 are provided on both sides of the second mounting column 21, and the clamping bolts 44 are movably connected to the bayonet holes 24. The bolts 43 are additional structures and can be disassembled when not needed. When the thread direction of the thread groove 41 is the same as the rotation direction of the cold twist drill, the bolts 43 are rotated in the screw holes 42, so that the clamping bolts 44 on both sides are stuck in the bayonet holes 24, thereby fixing the structure.

[0028] The working principle of the present invention is as follows: when the drill body 1 is installed, the drill body 1 is inserted from above the second connecting sleeve 4, so that the first mounting column 11 is stuck in the limiting groove 31, that is, the first mounting column 11 is installed in the first connecting sleeve 3, and is stuck in the clamping groove 32 through the clamping block 13, thereby clamping the drill body 1, and docking the bottom of the drill mounting seat 2 through the second connecting sleeve 4, and then connecting the threaded column 22 through the threaded groove 41, so that the second connecting sleeve 4 is connected to the drill mounting seat 2, and when connecting, the hexagonal port 12 is connected through the hexagonal bolt 23, and the second connecting sleeve 4 is rotated on the first connecting sleeve 3, so that the drill body 1 is connected to the drill mounting seat 2, thereby completing the assembly of the cold twist drill, and the thread direction of the threaded groove 41 is opposite to the rotation direction of the cold twist drill, thereby ensuring that the cold twist drill will not fall off during use, and vice versa, it is convenient to disassemble.

[0029] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cold twist drill for facilitating drill bit replacement, comprising a drill bit body (1) and a drill bit mounting base (2), characterized in that: A first connecting sleeve (3) is provided above the drill bit body (1), and a second connecting sleeve (4) is provided below the drill bit mounting seat (2). The first connecting sleeve (3) and the second connecting sleeve (4) are hollow in design. A first mounting column (11) is provided on the top of the drill bit body (1), and a limiting groove (31) is provided on the inner side of the bottom of the first connecting sleeve (3). The first mounting column (11) is clamped on the limiting groove (31). A second mounting column (21) is provided at the bottom of the drill bit mounting seat (2), and a threaded column (22) is provided at the bottom of the second mounting column (21). A threaded groove (41) is provided inside the second connecting sleeve (4), and the threaded groove (41) is threadedly connected to the threaded column (22).

2. A cold twist drill for easy drill bit replacement according to claim 1, characterized in that: A hexagonal opening (12) is provided at the top of the first mounting column (11), and a hexagonal bolt (23) is provided at the bottom of the threaded column (22), and the hexagonal bolt (23) is slidably connected to the hexagonal opening (12).

3. A cold twist drill for easy drill bit replacement according to claim 1, characterized in that: The limiting groove (31) is provided with clamping grooves (32) on both sides, and the bottom of the first installation column (11) is provided with clamping blocks (13) on both sides, and the clamping blocks (13) are slidably connected to the clamping grooves (32).

4. A cold twist drill for easy drill bit replacement according to claim 1, characterized in that: A limiting ring (33) is provided on the outer side of the top of the first connecting sleeve (3), and an annular groove (34) is provided on the inner side of the bottom of the second connecting sleeve (4), and the limiting ring (33) and the annular groove (34) are movably connected.

5. The cold twist drill for easy drill bit replacement according to claim 1, characterized in that: Screw holes (42) are provided on both sides of the top of the second connecting sleeve (4), bolts (43) are provided inside the screw holes (42), and the bolts (43) are threadedly connected to the screw holes (42).

6. A cold twist drill for easy drill bit replacement according to claim 5, characterized in that: A latch bolt (44) is provided inside the bolt (43), and bayonet holes (24) are provided on both sides of the second mounting column (21), and the latch bolt (44) is movably connected to the bayonet holes (24).

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