Stepped drill capable of adjusting depth of stepped hole

Abstract

The utility model belongs to the technical field of cutting drills, particularly relates to a stepped drill capable of adjusting the depth of a stepped hole, and aims to solve the problems that an existing stepped drill cannot stretch out and draw back during use, namely the length is fixed, so that a worker cannot adjust the overall length of the stepped drill according to needs during use, and the drilling depth cannot be adjusted. According to the scheme, the stepped drill comprises a stepped drill handle, an adjusting mechanism used for adjusting the stepped drill is arranged at one end of the stepped drill handle, and a cooling mechanism used for cooling the stepped drill is arranged at the other end of the stepped drill handle; the adjusting mechanism comprises an adjusting piece which is telescopically connected to one end of the stepped drill handle, and a limiting ring is fixed to the tail end of the adjusting piece. According to the step drill, the limiting bolt is screwed off, so that the limiting bolt is separated from the outer wall of the adjusting piece, the drill bit body can be pulled to move under the cooperation of the limiting ring and the guide rod, and then the overall length of the step drill is adjusted.

Description

Technical Field

[0001] This utility model relates to a stepped drill, specifically a stepped drill with adjustable stepped hole depth, belonging to the field of cutting drill technology. Background Technology

[0002] A step drill, also known as a step drill or pagoda drill, is a commonly used cutting tool on CNC lathes. It gets its name from the stepped shape of its cutting edge and is primarily used in CNC lathe machining. Its design allows for drilling holes of various diameters in a single pass, thus improving drilling efficiency and reducing the frequency of drill bit changes. Step drills are widely used in construction, machinery manufacturing, and other fields.

[0003] In existing technologies, such as the stepped drill disclosed in publication number CN220805599U, a step drill includes a first drill body, a neck, a second drill body, a spiral groove, and a shank. The second drill body and the shank are coaxially arranged. The first and second drill bodies are connected by the neck. The first drill body, the neck, and the second drill body are stepped, and both the first and second drill bodies have reverse chamfers. The front end of the first drill body has an R-shaped chisel edge. The spiral groove extends from the tip of the first drill body to the end of the second drill body. The neck is reinforced at both ends. By reinforcing the neck of the tool, it enhances the overall strength of the tool and extends its service life.

[0004] Although the above-mentioned technical solution strengthens the overall strength of the tool and extends its service life by reinforcing the neck of the tool, it cannot be extended or retracted during use, meaning its length is fixed. This prevents operators from adjusting the overall length of the step drill as needed, and consequently, from adjusting the drilling depth. Therefore, this paper provides a step drill with adjustable step hole depth to overcome the above-mentioned defects. Utility Model Content

[0005] This invention addresses the problem of a stepped drill with adjustable step hole depth, where the drill's length is fixed and cannot be extended or retracted during use, thus preventing operators from adjusting the overall length and drilling depth.

[0006] The present invention achieves the above objectives through the following technical solution: a step drill with adjustable step hole depth, comprising a step drill shank, one end of which is provided with an adjustment mechanism for adjusting the step drill, and the other end of which is provided with a cooling mechanism for cooling the step drill.

[0007] The adjustment mechanism includes an adjustment component, which is telescopically connected to one end of the stepped drill shank. A limit ring is fixed at the end of the adjustment component, and a guide rod that is fixedly connected to the inner wall of the stepped drill shank is inserted into the adjustment component. The front end of the adjustment component is connected to the drill bit body.

[0008] As a further improvement of this utility model: a connector is fixed on one side of the drill bit body, and a limit hole is formed on the outer surface of the connector.

[0009] As a further embodiment of this utility model: the inner part of the limiting hole is connected to a fixing bolt that is threadedly connected to the adjusting member, and the outer surface of the stepped drill shank is equipped with a limiting bolt that abuts against the outer wall of the adjusting member.

[0010] As a further improvement of this utility model: a chip removal groove is provided on the outer surface of the drill bit body, and three sets of drilling cutters are fixed on the outer surface of the drill bit body by screws.

[0011] As a further improvement of this utility model, the outer wall of the drill bit body is provided with water spray holes.

[0012] As a further improvement of this utility model: the cooling mechanism includes a water inlet pipe, which is installed at the other end of the stepped drill shank.

[0013] As a further embodiment of this utility model: a limiting plate is fixed to the end of the water inlet pipe, and a fixing member that is fixedly connected to the inner wall of the stepped drill shank is rotatably connected to the outer surface of the limiting plate.

[0014] The beneficial effects of this utility model are: by unscrewing the limiting bolt, the limiting bolt and the outer wall of the adjusting part are separated. With the cooperation of the limiting ring and the guide rod, the drill bit body can be pulled to move, thereby adjusting the overall length of the stepped drill.

[0015] The cooling water enters the stepped drill shank through the inlet pipe and the external water supply pipe. The limiting plate and fixing parts prevent the inlet pipe from falling off. The cooling water enters the spray hole through the internal flow chamber, so that the spray hole sprays cooling water onto the drill bit, thereby achieving the cooling effect. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic cross-sectional view of the stepped drill shank of this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the drill bit body of this utility model;

[0019] Figure 4This utility model Figure 1 Enlarged view of point A in the middle.

[0020] In the diagram: 1. Stepped drill shank; 2. Adjusting component; 21. Limiting ring; 22. Guide rod; 23. Drill bit body; 24. Connecting component; 25. Limiting hole; 26. Fixing bolt; 27. Limiting bolt; 3. Chip removal groove; 4. Drilling cutter; 5. Water spray hole; 6. Water inlet pipe; 61. Limiting plate; 62. Fixing component. Detailed Implementation

[0021] 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. Example 1

[0022] like Figures 1 to 4 As shown, a stepped drill with adjustable stepped hole depth includes a stepped drill shank 1. One end of the stepped drill shank 1 is provided with an adjustment mechanism for adjusting the stepped drill, and the other end of the stepped drill shank 1 is provided with a cooling mechanism for cooling the stepped drill.

[0023] The adjustment mechanism includes an adjustment component 2, which is telescopically connected to one end of the stepped drill shank 1. A limit ring 21 is fixed to the end of the adjustment component 2. A guide rod 22, which is fixedly connected to the inner wall of the stepped drill shank 1, is inserted into the adjustment component 2. A drill bit body 23 is connected to the front end of the adjustment component 2. A connecting component 24 is fixed to one side of the drill bit body 23. A limit hole 25 is formed on the outer surface of the connecting component 24. A fixing bolt 26, which is threadedly connected to the adjustment component 2, is inserted into the limit hole 25. A limit bolt 27, which abuts against the outer wall of the adjustment component 2, is installed on the outer surface of the stepped drill shank 1. A limit bolt 27, which abuts against the outer wall of the adjustment component 2, is formed on the outer surface of the drill bit body 23. The drill bit body 23 has a chip removal groove 3. Three sets of drilling cutters 4 are fixed to the outer surface of the drill bit body 23 by screws. When the overall length of the stepped drill needs to be adjusted, the limiting bolt 27 can be unscrewed, so that the limiting bolt 27 and the outer wall of the adjusting part 2 are separated. With the cooperation of the limiting ring 21 and the guide rod 22, the drill bit body 23 can be pulled to move, thereby adjusting the overall length of the stepped drill. By unscrewing the fixing bolt 26 on the adjusting part 2, the fixing bolt 26 and the limiting hole 25 on the connecting part 24 are separated. With the cooperation of the adjusting part 2, the drill bit body 23 can be disassembled separately for easy replacement. Example 2

[0024] In addition to all the technical features in Embodiment 1, this embodiment also includes: a water spray hole 5 is provided on the outer wall of the drill bit body 23; the cooling mechanism includes a water inlet pipe 6; the water inlet pipe 6 is installed at the other end of the stepped drill shank 1; a limit plate 61 is fixed at the end of the water inlet pipe 6; a fixing member 62 is rotatably connected to the outer surface of the limit plate 61 and fixedly connected to the inner wall of the stepped drill shank 1; the bed drives the stepped drill shank 1 to rotate, thereby driving the drill bit body 23 to rotate and process the workpiece; the chip removal groove 3 facilitates the discharge of waste chips generated during processing; and the three sets of drilling cutters 4 provided on the drill bit body 23 are blades of different lengths, so that the three sets of drilling cutters 4 form a stepped drill bit; the water inlet pipe 6 is connected to an external water supply pipe; cooling water enters into the stepped drill shank 1 through the water inlet pipe 6; the limit plate 61 and the fixing member 62 can prevent the water inlet pipe 6 from falling off; the cooling water enters the water spray hole 5 through the internal flow cavity, so that the water spray hole 5 sprays cooling water onto the drilling cutter 4, thereby achieving the cooling effect.

[0025] Working principle: Before using this stepped drill with adjustable depth, connect the stepped drill to the output shaft of the machine tool. Fix the stepped drill shank 1 to the output shaft so that the machine tool drives the stepped drill shank 1 to rotate, which in turn drives the drill body 23 to rotate, thus machining the workpiece. The chip removal groove 3 facilitates the discharge of waste chips generated during machining. The three sets of drilling cutters 4 on the drill body 23 are blades of different lengths, forming a stepped drill bit. The water inlet pipe 6 is connected to an external water supply pipe, and cooling water enters the stepped drill shank 1 through the water inlet pipe 6. The limiting plate 61 and the fixing part 62 prevent the water inlet pipe 6 from falling off. Cooling water enters the spray hole 5 through the internal flow chamber, causing the spray hole 5 to spray cooling water onto the drill bit 4, thereby achieving the cooling effect. When it is necessary to adjust the overall length of the stepped drill, the limiting bolt 27 can be unscrewed, so that the limiting bolt 27 and the outer wall of the adjusting part 2 are separated. With the cooperation of the limiting ring 21 and the guide rod 22, the drill bit body 23 can be pulled to move, thereby adjusting the overall length of the stepped drill. By unscrewing the fixing bolt 26 on the adjusting part 2, the fixing bolt 26 and the limiting hole 25 on the connecting part 24 are separated. With the cooperation of the adjusting part 2, the drill bit body 23 can be disassembled separately for easy replacement.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stepped drill with adjustable stepped hole depth, comprising a stepped drill shank (1), characterized in that: One end of the stepped drill shank (1) is provided with an adjustment mechanism for adjusting the stepped drill, and the other end of the stepped drill shank (1) is provided with a cooling mechanism for cooling the stepped drill. The adjustment mechanism includes an adjustment component (2), which is telescopically connected to one end of the stepped drill shank (1). A limit ring (21) is fixed at the end of the adjustment component (2). A guide rod (22) is inserted into the adjustment component (2) and fixedly connected to the inner wall of the stepped drill shank (1). A drill bit body (23) is connected to the front end of the adjustment component (2).

2. The stepped drill with adjustable stepped hole depth according to claim 1, characterized in that: A connector (24) is fixed on one side of the drill bit body (23), and a limit hole (25) is formed on the outer surface of the connector (24).

3. A stepped drill with adjustable stepped hole depth according to claim 2, characterized in that: The limiting hole (25) is internally connected to a fixing bolt (26) that is threadedly connected to the adjusting member (2), and the outer surface of the stepped drill shank (1) is fitted with a limiting bolt (27) that abuts against the outer wall of the adjusting member (2).

4. A stepped drill with adjustable stepped hole depth according to claim 3, characterized in that: The outer surface of the drill bit body (23) is provided with a chip removal groove (3), and three sets of drilling cutters (4) are fixed to the outer surface of the drill bit body (23) by screws.

5. A stepped drill with adjustable stepped hole depth according to claim 4, characterized in that: The outer wall of the drill bit body (23) is provided with water spray holes (5).

6. A stepped drill with adjustable stepped hole depth according to claim 1, characterized in that: The cooling mechanism includes a water inlet pipe (6), which is installed at the other end of the stepped drill shank (1).

7. A stepped drill with adjustable stepped hole depth according to claim 6, characterized in that: The end of the water inlet pipe (6) is fixed with a limiting plate (61), and the outer surface of the limiting plate (61) is rotatably connected with a fixing member (62) that is fixedly connected to the inner wall of the stepped drill shank (1).

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