Threaded handle drill bit with adjustable structure

Abstract

The utility model belongs to the technical field of drill bits, particularly relates to a threaded handle drill bit with an adjustable structure, and aims to solve the problem that a drill body at the top end of the drill bit is fixedly mounted in a bearing drill body in the use process of some drill bits with multi-step structures; in order to solve the problem that the length of a drill body at the top end needs to be continuously changed during subsequent machining of workpieces with different depths, the following scheme is provided: the device comprises a drill bit seat, an adjusting structure is arranged in the drill bit seat, a drill bit is in threaded connection with the upper part of the adjusting structure, and the drill body is mounted at the top end of the drill bit in a threaded manner; a fixing assembly is arranged at the joint of the drill bit base and the drill bit. By rotating the knob, the knob drives the connecting rod and the first bevel gear to rotate, the first bevel gear drives the second bevel gear and the rotating rod above the second bevel gear to rotate, and threads on the outer side of the rotating rod can push the drill body at the top end to move, so that the length of the drill body is adjusted; and the drill bit and the drill bit seat are clamped and fixed through the fixing structure.

Description

Technical Field

[0001] The utility model relates to a drill bit, in particular to a threaded shank drill bit with an adjustable structure, belonging to the technical field of drill bits. Background Art

[0002] When holes need to be dug in some instrument components or objects, various drill bits will be used. A drill bit is a cutting tool used to cut out circular holes. The basic principle is that the drill bit cuts the workpiece during rotation, and the drill groove discharges the drill chips. Commonly used drill bits include twist drills, flat drills, center drills, deep hole drills and sleeve drills, among which threaded drill bits are also a type of drill bit.

[0003] In the prior art, a combined circular cutting step drill disclosed in announcement number CN206567578U is also a drill bit. By combining a twist drill and a step drill into an integrated structure, compared with a traditional step drill, the cutting force is dispersed, the cutting force is reduced, the cutting is lighter, the chip removal is smoother, the positioning is more precise, and the processing accuracy of the hole is greatly improved. A large amount of cutting heat is reduced during the processing process, the service life of the tool is increased, and the production efficiency is improved.

[0004] However, during the processing and use of the drill bit, the size and thickness of the workpiece are different. If the twist drill and the step drill are combined into a single integrated structure, the size of the workpiece will be fixed. Then, when using the combined ring-cut step drill to process workpieces of different sizes and thicknesses, an integrated twist drill and a step drill are required, which is more troublesome. In view of this, a threaded shank drill with an adjustable structure is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model provides a threaded shank drill with an adjustable structure to solve the problem that, during the processing and use of the drill bit, the sizes and thicknesses of the workpieces are different, and the twist drill and the step drill are combined into a single integrated structure, so the size of the processed workpiece will be fixed. When the combined circular cutting step drill is used to process workpieces of different sizes and thicknesses, an integrated twist drill and a step drill are required, which is rather troublesome.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions: a threaded shank drill bit with an adjustable structure, comprising a drill bit seat, wherein an adjustment structure is arranged inside the drill bit seat;

[0007] The upper part of the adjustment structure is threadedly connected with a drill bit, the top end of the drill bit is threadedly mounted with a drill body, and a fixing component is provided at the connection between the drill bit seat and the drill bit;

[0008] The adjustment structure includes a knob, a connecting rod is fixedly installed on the side of the knob close to the drill bit seat, one end of the connecting rod passes through the drill bit seat and is rotatably installed on the inner wall of the drill bit seat through a bearing, a first bevel gear is fixedly installed on one end of the connecting rod located inside the drill bit seat, a second bevel gear is meshed and connected above the first bevel gear, and a rotating rod is fixedly installed above the second bevel gear.

[0009] As a further solution of the utility model: a threaded installation groove matching the drill body is provided at the connection between the drill bit and the drill body, and the threaded installation groove is provided on the drill bit.

[0010] As a further solution of the utility model: the top end of the rotating rod passes through the drill bit and the drill body, and the rotating rod is provided with a thread on the outside of the drill body, and a thread matching the thread is provided at the connection between the drill body and the thread.

[0011] As a further solution of the utility model: the fixing assembly includes two groups of symmetrically arranged fixing plates, the fixing plates are arranged on both sides of the drill bit seat, a fixing rod is rotatably installed in the middle of the fixing plate, a limiting plate is fixedly installed in the middle of the fixing rod, and tension springs are fixedly installed on both sides of the top of the limiting plate.

[0012] As a further solution of the utility model: the limit plate is an arc-shaped structure, and one end of the tension spring is fixedly mounted on the edge of the outer side of the limit plate, and the other end is fixedly mounted on the drill seat.

[0013] As a further solution of the utility model: the connection between the drill seat and the drill bit and the limiting plate of the fixing assembly is provided with limiting grooves matching the limiting plate, and the limiting grooves are respectively provided on the drill seat and the drill bit.

[0014] As a further solution of the utility model: one group of the limiting grooves is a triangular structure.

[0015] The beneficial effects of the utility model are:

[0016] 1. By turning the knob, the knob drives the connecting rod and the first bevel gear to rotate, and the first bevel gear drives the second bevel gear and the rotating rod above the second bevel gear to rotate, so that the thread on the outside of the rotating rod can push the drill body at the top to move, thereby achieving the effect of adjusting the length of the drill body.

[0017] 2. When installing the drill bit through the drill seat, pull the limit plates on both sides so that the limit plates are located on the outside of the drill seat. Then when the drill bit is fully inserted into the inside of the drill seat, loosen the limit plates. The tension springs on both sides of the limit plates will bounce the limit plates back into the limit grooves at the drill seat and the drill bit, and jam the drill bit to prevent it from moving, thereby strengthening the connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the drill body and the adjustment structure of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the fixing assembly of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the side of the utility model.

[0022] In the figure: 1. drill bit holder; 2. adjustment structure; 201. knob; 202. connecting rod; 203. first bevel gear; 204. second bevel gear; 205. rotating rod; 3. drill bit; 4. drill body; 5. fixing assembly; 501. fixing plate; 502. fixing rod; 503. limiting plate; 504. tension spring; 6. threaded mounting groove; 7. limiting groove. DETAILED DESCRIPTION

[0023] 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. Embodiment 1

[0024] like Figures 1 to 4 As shown, a threaded shank drill bit with an adjustable structure comprises a drill bit seat 1, and an adjustment structure 2 is arranged inside the drill bit seat 1;

[0025] The upper part of the adjustment structure 2 is threadedly connected with a drill bit 3, the top end of the drill bit 3 is threadedly mounted with a drill body 4, and a fixing component 5 is provided at the connection between the drill bit seat 1 and the drill bit 3;

[0026] The adjustment structure 2 includes a knob 201, a connecting rod 202 is fixedly installed on one side of the knob 201 close to the drill bit seat 1, one end of the connecting rod 202 passes through the drill bit seat 1, and is rotatably installed on the inner wall of the drill bit seat 1 through a bearing, a first bevel gear 203 is fixedly installed on one end of the connecting rod 202 located inside the drill bit seat 1, a second bevel gear 204 is meshed and connected above the first bevel gear 203, and a rotating rod 205 is fixedly installed above the second bevel gear 204.

[0027] As a further solution of the utility model: a threaded mounting groove 6 matching the drill body 4 is provided at the connection between the drill bit 3 and the drill body 4 , and the threaded mounting groove 6 is provided on the drill bit 3 .

[0028] As a further solution of the utility model: the top end of the rotating rod 205 passes through the drill bit 3 and the drill body 4, and the rotating rod 205 is provided with a thread on the outside of the drill body 4, and a thread matching the thread is provided at the connection between the drill body 4 and the thread. Embodiment 2

[0029] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0030] As a further solution of the utility model: the fixing assembly 5 includes two groups of symmetrically arranged fixing plates 501, the fixing plates 501 are arranged on both sides of the drill bit seat 1, and a fixing rod 502 is rotatably installed in the middle of the fixing plate 501, and a limiting plate 503 is fixedly installed in the middle of the fixing rod 502, and tension springs 504 are fixedly installed on both sides of the top of the limiting plate 503. The fixing plate 501 and the fixing rod 502 play a bearing and fixing role for the limiting plate 503, and the tension springs 504 arranged on both sides of the limiting plate 503 enable it to have a certain rebound effect, so that the drill bit 3 can be clamped by the limiting plate 503.

[0031] As a further solution of the utility model: the limit plate 503 is an arc-shaped structure, and one end of the tension spring 504 is fixedly installed on the edge of the outer side of the limit plate 503, and the other end is fixedly installed on the drill bit seat 1. The tension springs 504 on both sides of the limit plate 503 will bounce the limit plate 503 back into the limit groove 7 at the drill bit seat 1 and the drill bit 3, and make it jam the drill bit 3 to prevent it from moving, thereby strengthening the connection between the two.

[0032] As a further solution of the utility model: the connection between the drill bit seat 1 and the drill bit 3 and the limit plate 503 of the fixing assembly 5 is provided with a limit groove 7 matching the limit plate 503, and the limit groove 7 is respectively provided on the drill bit seat 1 and the drill bit 3. The limit groove 7 provided on the drill bit 3 and the drill bit seat 1 can facilitate the insertion of the limit plate 503, so that the upper limit plate 503 can fix the drill bit 3.

[0033] As a further solution of the present invention: one group of the limiting grooves 7 is a triangular structure, and the triangular structure facilitates the fixing of the limiting plate 503.

[0034] Working principle: first press the limit plates 503 on both sides of the drill seat 1, then insert the drill bit 3 into the bottom end of the drill seat 1. During the process of inserting the drill bit 3 into the drill seat 1, the rotating rod 205 of the adjusting structure 2 will be inserted into the inside of the drill bit 3 and extend to its top. Then the limit plates 503 can be loosened. The tension springs 504 on both sides of the limit plates 503 will bounce the limit plates 503 back into the limit grooves 7 at the drill seat 1 and the drill bit 3, and make it jam the drill bit 3 to prevent it from moving and strengthen the connection between the two. Then the drill body 4 is threadedly installed on the drill bit 3. The top end, and the bottom end surface of the drill body 4 can also be threadedly installed with the top end of the rotating rod 205. At this time, the drill bit 3, the drill body 4 and the drill bit seat 1 are installed and can be used. During use, the knob 201 can be rotated to make the knob 201 drive the connecting rod 202 and the first bevel gear 203 to rotate, and the first bevel gear 203 drives the second bevel gear 204 and the rotating rod 205 above the second bevel gear 204 to rotate, so that the thread on the outside of the rotating rod 205 can push the drill body 4 at the top to move, thereby achieving the effect of adjusting the length of the drill body 4.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A threaded shank drill bit with an adjustable structure, comprising a drill bit holder (1), characterized in that: An adjustment structure (2) is provided inside the drill bit seat (1); The upper part of the adjustment structure (2) is threadedly connected to a drill bit (3), the top end of the drill bit (3) is threadedly mounted with a drill body (4), and a fixing component (5) is provided at the connection between the drill bit seat (1) and the drill bit (3); The adjustment structure (2) comprises a knob (201), a connecting rod (202) being fixedly mounted on a side of the knob (201) close to the drill bit seat (1), one end of the connecting rod (202) passing through the drill bit seat (1) and being rotatably mounted on the inner wall of the drill bit seat (1) via a bearing, a first bevel gear (203) being fixedly mounted on one end of the connecting rod (202) located inside the drill bit seat (1), a second bevel gear (204) being meshingly connected above the first bevel gear (203), and a rotating rod (205) being fixedly mounted above the second bevel gear (204).

2. A threaded shank drill bit with an adjustable structure according to claim 1, characterized in that: A threaded mounting groove (6) matching the drill body (4) is provided at the connection between the drill bit (3) and the drill body (4); the threaded mounting groove (6) is provided on the drill bit (3).

3. A threaded shank drill bit with an adjustable structure according to claim 1, characterized in that: The top end of the rotating rod (205) passes through the drill bit (3) and the drill body (4), and the rotating rod (205) is provided with a thread on the outside of the drill body (4), and a thread matching the thread is provided at the connection between the drill body (4) and the thread.

4. A threaded shank drill bit with an adjustable structure according to claim 1, characterized in that: The fixing assembly (5) comprises two groups of symmetrically arranged fixing plates (501), wherein the fixing plates (501) are arranged on both sides of the drill bit seat (1), a fixing rod (502) is rotatably mounted in the middle of the fixing plates (501), a limiting plate (503) is fixedly mounted in the middle of the fixing rod (502), and tension springs (504) are fixedly mounted on both sides of the top of the limiting plate (503).

5. A threaded shank drill bit with an adjustable structure according to claim 4, characterized in that: The limit plate (503) is an arc-shaped structure, and one end of the tension spring (504) is fixedly mounted on the outer edge of the limit plate (503), and the other end is fixedly mounted on the drill seat (1).

6. A threaded shank drill bit with an adjustable structure according to claim 1, characterized in that: The connection between the drill seat (1) and the drill bit (3) and the limiting plate (503) of the fixing assembly (5) is provided with a limiting groove (7) matching the limiting plate (503), and the limiting groove (7) is respectively provided on the drill seat (1) and the drill bit (3).

7. A threaded shank drill bit with an adjustable structure according to claim 6, characterized in that: One group of the limiting grooves (7) is a triangular structure.

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