Threaded handle drill bit with cylindrical positioning structure

Abstract

The utility model belongs to the technical field of drill bits, particularly relates to a threaded handle drill bit with a cylindrical positioning structure, and aims to solve the problem that the cylindrical positioning structure arranged at the joint of some drill bits cannot be suitable for the installation of the drill bits with different diameters and sizes. A cylindrical positioning structure is fixedly installed above the drill bit rod, a connecting rod is connected to the upper portion of the cylindrical positioning structure in a threaded mode, and a drill bit is fixedly installed above the connecting rod. By means of the threads symmetrically arranged on the outer side of the rotating rod, the rotating rod pushes the arc-shaped fixing plates on the two sides to move relatively in the rotating process, the diameter of a wrapping and fixing connecting rod and a drill bit can be enlarged, and therefore the effect of installing and fixing the drill bits with different diameters is achieved; and the chip removal effect is achieved through the chip removal grooves formed in the inner sides of the multiple sets of spiral blades spirally arranged on the drill bit, and a certain chip breaking effect is improved by arranging slope structures on the surfaces of the chip removal grooves.

Description

Technical Field

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

[0002] A drill bit is generally a cutting tool used by a drill or drilling machine to cut out circular holes. The basic principle is to rotate the drill bit to cut the workpiece, and then discharge the drill chips through the drill groove. Commonly used drill bits include twist drills, flat drills, center drills, deep hole drills and casing drills.

[0003] In the prior art, the cylindrically positioned threaded shank drill bit disclosed in announcement number CN210172734U is also a threaded shank drill bit, which adds a positioning cylinder, and the drill bit and the drilling machine fixture are connected and fastened by a threaded pair. The top of the drill bit fixture is set as a hole, and the inner surface of the hole contacts the outer cylindrical surface of the positioning cylinder on the drill bit, and the two are in surface contact. The processing accuracy of the cylindrical surface is higher than the processing accuracy of the thread in terms of technology, and is easier to guarantee. Through the positioning of the positioning cylinder, the straightness of the drill bit is better, the drilling accuracy is higher, and the clamping accuracy and drilling processing accuracy of the drill bit are greatly improved.

[0004] In the above scheme, a cylindrical positioning cylinder is provided at the connection between the shank and the cutter head, so that the two are fixedly installed by fastening bolts. However, since the diameters of the shank and the cutter head on which the positioning cylinder itself is installed are fixed sizes, when installing the positioning cylinder, a single positioning cylinder can only adapt to a fixed drill bit diameter. Therefore, its adaptation range is relatively small and it cannot be used for the installation of drill bits of different diameters. In view of this, a threaded shank drill bit with a cylindrical positioning structure is provided to overcome the above defects. Utility Model Content

[0005] The utility model provides a threaded shank drill bit with a cylindrical positioning structure to solve the problem that a cylindrical positioning cylinder is provided at the connection between the shank and the cutter head so that the two are fixedly installed by fastening bolts. However, since the diameters of the shank and the cutter head on which the positioning cylinder itself is installed are fixed in size, when the positioning cylinder is installed, a single positioning cylinder can only be adapted to a fixed drill bit diameter. Therefore, its adaptation range is relatively small and it cannot be applied to the installation of drill bits of different diameters.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions: a threaded shank drill bit with a cylindrical positioning structure, comprising a drill bit rod, on the top of which a cylindrical positioning structure is fixedly installed;

[0007] A connecting rod is threadedly connected to the top of the cylindrical positioning structure, and a drill bit is fixedly installed on the top of the connecting rod;

[0008] The cylindrical positioning structure includes a mounting plate, which is fixedly installed above the drill rod. Two symmetrically arranged arc-shaped fixing plates are slidably installed above the mounting plate. A rotating rod is arranged in the middle of the two arc-shaped fixing plates, and both ends of the rotating rod pass through the arc-shaped fixing plates. A screw is fixedly installed in the middle of the mounting plate.

[0009] As a further solution of the utility model: threads are symmetrically arranged on the outer side of the rotating rod, threaded holes matching the threads are provided at the connection between the arc-shaped fixing plate and the threads, and the threaded holes are provided on the arc-shaped fixing plate.

[0010] As a further solution of the utility model: threads are symmetrically arranged on the outer side of the rotating rod, threaded holes matching the threads are provided at the connection between the arc-shaped fixing plate and the threads, and the threaded holes are provided on the arc-shaped fixing plate.

[0011] As a further solution of the utility model: the connection points between the connecting rod and the screw rod and the rotating rod are all provided with sockets matching with the rotating rod, and the sockets are provided on the connecting rod and the screw rod.

[0012] As a further solution of the utility model: the drill bit includes a plurality of groups of spiral blades, the spiral blades are spirally distributed on the drill bit, a chip removal groove is provided between two adjacent groups of spiral blades, and the chip removal groove is provided on the drill bit.

[0013] As a further solution of the utility model: the surface of the chip removal groove is provided with a slope structure.

[0014] As a further solution of the utility model: a mounting groove matching with the screw rod is provided at the connection between the connecting rod and the screw rod, and the mounting groove is provided inside the connecting rod.

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

[0016] 1. The threads symmetrically arranged on the outer side of the rotating rod can respectively push the arc-shaped fixing plates on both sides to move relative to each other during the rotation process, so that the diameter of the connecting rod and the drill bit can be expanded to wrap around and fix the connecting rod, thereby achieving the installation and fixing effect of drill bits of different diameters.

[0017] 2. The chip removal effect of the drill bit during operation is achieved through the chip removal grooves opened on the inner side of the multiple sets of spiral blades spirally arranged at the drill bit, avoiding excessive waste accumulation at the drill bit and affecting the drilling of the drill bit. The setting of the chip removal groove slope structure can increase the chip breaking effect of the chip removal groove during the chip removal process, and utilize its uneven slope structure to separate the waste chips from the workpiece during the drilling process. 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 bit and cylindrical fixing structure of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the cylindrical fixing structure 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 rod; 2. cylindrical positioning structure; 201. mounting plate; 202. arc-shaped fixing plate; 203. rotating rod; 204. screw rod; 3. connecting rod; 4. drill bit; 5. slider; 6. slide groove; 7. socket; 8. spiral blade; 9. chip removal groove; 10. mounting 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 a cylindrical positioning structure comprises a drill bit rod 1, and a cylindrical positioning structure 2 is fixedly installed on the upper side of the drill bit rod 1;

[0025] A connecting rod 3 is threadedly connected to the top of the cylindrical positioning structure 2, and a drill bit 4 is fixedly installed on the top of the connecting rod 3;

[0026] The cylindrical positioning structure 2 includes a mounting plate 201, which is fixedly installed above the drill rod 1. Two symmetrically arranged arc-shaped fixing plates 202 are slidably installed above the mounting plate 201. A rotating rod 203 is arranged in the middle of the two arc-shaped fixing plates 202, and both ends of the rotating rod 203 pass through the arc-shaped fixing plates 202. A screw 204 is fixedly installed in the middle of the mounting plate 201.

[0027] As a further implementation scheme of the above technical scheme: threads are symmetrically arranged on the outer side of the rotating rod 203, and threaded holes matching the threads are opened at the connection between the arc-shaped fixing plate 202 and the threads. The threaded holes are opened on the arc-shaped fixing plate 202. The threaded holes facilitate the rotation of the rotating rod 203 and drive the arc-shaped fixing plate 202 to move relative to each other, thereby achieving the wrapping and fixing effect of the connecting rods 3 with different diameters.

[0028] As a further implementation scheme of the above technical scheme: a slider 5 is fixedly installed below the arc-shaped fixed plate 202, and a slide groove 6 matching the slider 5 is provided at the connection between the mounting plate 201 and the slider 5. The slide groove 6 is provided on the mounting plate 201. The opening of the slide groove 6 facilitates the sliding effect of the slider 5 and the arc-shaped fixed plate 202, and can fix the sliding trajectory of the slider 5 and the arc-shaped fixed plate 202.

[0029] As a further implementation scheme of the above technical scheme: the connection points between the connecting rod 3 and the screw rod 204 and the rotating rod 203 are all provided with sockets 7 matching the rotating rod 203, and the sockets 7 are provided on the connecting rod 3 and the screw rod 204. The sockets 7 facilitate the rotating rod 203 to pass through the connecting rod 3 and the screw rod 204, and be inserted into the threaded holes of one set of arc-shaped fixing plates 202, thereby facilitating the movement of the arc-shaped fixing plates 202. Embodiment 2

[0030] In addition to all the technical features of the first embodiment, this embodiment also includes:

[0031] As a further implementation scheme of the above technical scheme: the drill bit 4 includes multiple groups of spiral blades 8, which are spirally distributed on the drill bit 4, and a chip groove 9 is opened between two adjacent groups of spiral blades 8. The chip groove 9 is opened on the drill bit 4. The opening of the chip groove 9 can facilitate the drill bit 4 to use the chip groove 9 to achieve the chip removal effect of the drill bit 4 during operation, thereby avoiding excessive waste material accumulation at the drill bit 4 and affecting the drilling of the drill bit 4.

[0032] As a further implementation scheme of the above technical scheme: the surface of the chip groove 9 is provided with a slope structure, and the setting of the slope structure can increase the chip breaking effect of the chip groove 9 during the chip removal process, and utilize its uneven slope structure to enable the drill bit 4 to separate waste chips from the workpiece during the drilling process.

[0033] As a further implementation scheme of the above technical scheme: a mounting groove 10 matching the screw rod 204 is provided at the connection between the connecting rod 3 and the screw rod 204, and the mounting groove 10 is provided inside the connecting rod 3. The opening of the mounting groove 10 facilitates the quick connection between the screw rod 204 and the connecting rod 3, and also facilitates the tight connection between the connecting rod 3 and the screw rod 204 to avoid the two from separating during subsequent work.

[0034] Working principle: First, install the drill rod 1 with the fixture to be processed, then thread the connecting rod 3 and the drill bit 4 on the screw 204 of the cylindrical positioning structure 2 through the installation groove 10 to fix the two, then wrap the connecting rod 3 with the two sets of arc-shaped fixing plates 202, and insert the slider 5 below into the slide groove 6 of the installation plate 201, then pass one end of the rotating rod 203 through one set of arc-shaped fixing plates 202, the connecting rod 3 and the screw 204, and pass through the other set of arc-shaped fixing plates 202, then rotate one end of the rotating rod 203, so that the rotating rod 203 drives the two sets of arc-shaped fixing plates 202 through the threaded holes at the two sets of arc-shaped fixing plates 202. The arc-shaped fixing plate 202 moves relatively to completely wrap the connecting rod 3, and the arc-shaped fixing plate 202 can subsequently adjust the diameter of the wrapping by rotating the rotating rod 203, so as to facilitate the installation of connecting rods 3 and drill bits 4 of different diameters, thereby increasing the adaptability of the cylindrical positioning structure 2. Finally, during the working process of the drill bit 4, the chip groove 9 is used to achieve the chip removal effect of the drill bit 4, thereby avoiding excessive waste material from accumulating at the drill bit 4 and affecting the drilling of the drill bit 4. The slope structure at the chip groove 9 can increase the chip breaking effect of the chip groove 9 during the chip removal process, and utilize its uneven slope structure to separate the waste chips from the workpiece during the drilling process.

[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 a cylindrical positioning structure, comprising a drill bit shank (1), characterized in that: A cylindrical positioning structure (2) is fixedly mounted above the drill rod (1); A connecting rod (3) is threadedly connected to the top of the cylindrical positioning structure (2), and a drill bit (4) is fixedly mounted on the top of the connecting rod (3); The cylindrical positioning structure (2) comprises a mounting plate (201), the mounting plate (201) being fixedly mounted above the drill rod (1), two symmetrically arranged arc-shaped fixing plates (202) being slidably mounted above the mounting plate (201), a rotating rod (203) being arranged in the middle of the two arc-shaped fixing plates (202), and both ends of the rotating rod (203) passing through the arc-shaped fixing plates (202), and a screw rod (204) being fixedly mounted in the middle of the mounting plate (201).

2. A threaded shank drill bit with a cylindrical positioning structure according to claim 1, characterized in that: The outer side of the rotating rod (203) is symmetrically provided with threads, and a threaded hole matching the threaded hole is provided at the connection between the arc-shaped fixing plate (202) and the threaded hole, and the threaded hole is provided on the arc-shaped fixing plate (202).

3. A threaded shank drill bit with a cylindrical positioning structure according to claim 1, characterized in that: A sliding block (5) is fixedly mounted below the arc-shaped fixing plate (202), and a sliding groove (6) matching the sliding block (5) is provided at the connection between the mounting plate (201) and the sliding block (5), and the sliding groove (6) is provided on the mounting plate (201).

4. A threaded shank drill bit with a cylindrical positioning structure according to claim 1, characterized in that: The connection points between the connecting rod (3) and the screw rod (204) and the rotating rod (203) are all provided with a socket (7) matching the rotating rod (203), and the socket (7) is provided on the connecting rod (3) and the screw rod (204).

5. A threaded shank drill bit with a cylindrical positioning structure according to claim 1, characterized in that: The drill bit (4) comprises a plurality of groups of spiral blades (8), the spiral blades (8) being distributed on the drill bit (4) in a spiral shape, a chip removal groove (9) being provided between two adjacent groups of the spiral blades (8), and the chip removal groove (9) being provided on the drill bit (4).

6. A threaded shank drill bit with a cylindrical positioning structure according to claim 5, characterized in that: The surface of the chip removal groove (9) is provided with a slope structure.

7. A threaded shank drill bit with a cylindrical positioning structure according to claim 1, characterized in that: A mounting groove (10) matching the screw rod (204) is provided at the connection between the connecting rod (3) and the screw rod (204), and the mounting groove (10) is provided inside the connecting rod (3).

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