Three-blade drill bit

Abstract

The utility model relates to a three-blade drill bit, which belongs to the technical field of drilling tools, and comprises a box body, a three-blade drill bit body is slidably connected in the box body, two limiting mechanisms are arranged on the box body, a protection assembly is arranged on the three-blade drill bit body, each limiting mechanism comprises a cabin body fixedly connected with the box body, and the cabin body is fixedly connected with the box body. A worm is rotationally connected between the left side and the right side of the inner wall of the cabin body, a threaded rod is rotationally connected into the cabin body, and a worm wheel matched with the worm is fixedly connected to the outer side of the threaded rod. According to the three-blade drill bit, the limiting mechanism is arranged, so that the box body has a limiting function, and the effect of limiting the drill tip is achieved, so that the drill tip can be conveniently replaced after being damaged, the whole three-blade drill bit is prevented from being replaced, the use cost is reduced, the service life of the three-blade drill bit is prolonged, and a user can use the three-blade drill bit conveniently; and the practicability of the three-blade drill bit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling tools, in particular to a three-edge drill bit. Background Art

[0002] A three-edge drill is widely used as a hole processing tool. It has a shaft-shaped tool body with three cutting edges at the front end, and a groove portion formed on the shaft-shaped tool body with three discharge grooves for respectively discharging chips generated from the three cutting edges.

[0003] For example, Chinese patent CN220515509U discloses a three-blade drill bit that does not require reaming, including a drill bit body, wherein the drill bit body includes: a shank and a cutting portion fixedly connected to one end of the shank, the cutting portion being a three-blade structure supported by three spaced ligaments, and chip grooves being arranged between the three ligaments; the three ligaments are provided with bent straight cutting edges with groove front angles at one end away from the shank, and the three straight cutting edges with groove front angles extend to the center of the drill bit body to form a rotating drill tip structure. However, the drill tip of the three-blade drill bit directly contacts the gravel rock layer or the workpiece to be processed. When used for a long time, the drill tip is prone to breakage, resulting in poor guidance of the three-blade drill bit, large wear of the drill blade, and rapid damage to the three-blade drill bit. When the drill tip is damaged, the entire three-blade drill bit can only be scrapped, resulting in waste and shortening the service life of the three-blade drill bit. Therefore, a three-blade drill bit is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a three-blade drill bit, which has the advantages of convenient replacement of the drill tip, etc., and solves the problem that the drill tip of the three-blade drill bit directly contacts the gravel rock layer or the workpiece to be processed, and the drill tip is prone to breakage during long-term use, resulting in poor guidance of the three-blade drill bit, severe wear of the drill blade, and the three-blade drill bit being damaged very quickly. When the drill tip is damaged, the entire three-blade drill bit has to be scrapped, causing waste and shortening the service life of the three-blade drill bit.

[0005] To achieve the above object, the utility model provides the following technical solutions: a three-edged drill bit, comprising a box body, the interior of the box body is slidably connected with a three-edged drill bit body, the box body is provided with two limit mechanisms, and the three-edged drill bit body is provided with a protective component;

[0006] The limiting mechanism includes a cabin body fixedly connected to the box body, a worm gear is rotatably connected between the left and right sides of the inner wall of the cabin body, a threaded rod is rotatably connected to the inside of the cabin body, a worm wheel matched with the worm gear is fixedly connected to the outer side of the threaded rod, the outer side of the threaded rod is threadedly connected to a limiting block, and positioning blocks are fixedly connected to the left and right sides of the limiting block.

[0007] Furthermore, the protection component includes a support rod fixedly connected to the left side of the drill tip, the right side of the support rod is fixedly connected to the drill tip, a cavity is opened inside the support rod, a connecting pipe is fixedly connected to the top of the support rod, a valve is provided on the outside of the connecting pipe, and sliders are fixedly connected to the front and back sides of the support rod.

[0008] Furthermore, a handle for easy rotation is fixedly connected to the left side of the worm.

[0009] Furthermore, positioning grooves are provided on both the left and right sides of the inner wall of the cabin, and the inside of the positioning grooves is slidably connected to the outside of the positioning blocks.

[0010] Furthermore, a fixing hole is provided inside the three-edged drill body, and the size of the fixing hole is adapted to the size of the support rod.

[0011] Furthermore, the top and the bottom of the three-edged drill body are provided with limit grooves, and the size of the limit grooves is adapted to the size of the limit blocks.

[0012] Furthermore, a circular through hole is opened on the right side of the box body, and the size of the circular through hole is adapted to the size of the three-edged drill body.

[0013] Furthermore, a slide groove is provided inside the three-edged drill bit body, and the inside of the slide groove is slidably connected to the outside of the sliding block.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. The three-edged drill bit is provided with a limiting mechanism so that the box body has a limiting function, thereby achieving the effect of limiting the drill tip, so that it is convenient to replace the drill tip when it is damaged, avoiding the need to replace the entire three-edged drill bit, reducing the use cost, thereby increasing the service life of the three-edged drill bit, facilitating the use of users, and increasing the practicality of the three-edged drill bit.

[0016] 2. The three-blade drill bit has a protective function by providing a protective component, so as to achieve the effect of heat dissipation of the drill tip and the three-blade drill bit body, thereby reducing the temperature of the drill tip and the three-blade drill bit body during use, thereby increasing the service life of the three-blade drill bit body and the drill tip, facilitating the use of users, and improving the practicality of the three-blade drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0019] Figure 3 This is a schematic diagram of the support rod structure of the utility model;

[0020] Figure 4 This is a side view of the three-edged drill bit body structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the three-edged drill bit body of the utility model.

[0022] In the figure: 1. box body; 2. three-edged drill bit body; 3. drill tip; 4. cabin body; 5. worm; 6. threaded rod; 7. worm wheel; 8. limit block; 9. positioning block; 10. support rod; 11. cavity; 12. connecting pipe; 13. valve; 14. slider; 15. handle; 16. positioning 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.

[0024] See also Figure 1-4 A three-blade drill bit in this embodiment includes a box body 1, a circular through hole is opened on the right side of the box body 1, a three-blade drill bit body 2 is slidably connected to the inside of the box body 1, a fixing hole is opened inside the three-blade drill bit body 2, and limiting grooves are opened on the top and bottom of the three-blade drill bit body 2. The size of the circular through hole is adapted to the size of the three-blade drill bit body 2, a sliding groove is opened inside the three-blade drill bit body 2, two limiting mechanisms are arranged on the box body 1, and a protective component is arranged on the three-blade drill bit body 2.

[0025] It should be noted that, by providing the slider 14 and the slide groove, the support rod 10 is prevented from rotating inside the three-blade drill body 2, thereby increasing the stability of the three-blade drill body 2 when in use.

[0026] See also Figure 2 In this embodiment, the limiting mechanism includes a cabin body 4 fixedly connected to the box body 1, and positioning grooves 16 are provided on the left and right sides of the inner wall of the cabin body 4. A worm 5 is rotatably connected between the left and right sides of the inner wall of the cabin body 4, and a handle 15 for convenient rotation is fixedly connected to the left side of the worm 5. A threaded rod 6 is rotatably connected inside the cabin body 4, and a worm wheel 7 matched with the worm is fixedly connected to the outer side of the threaded rod 6.

[0027] It should be noted that, by providing the worm 5 and the worm wheel 7, the limiting mechanism has a self-locking property, thereby increasing the stability of the limiting mechanism when limiting and fixing.

[0028] See also Figure 2 In this embodiment, the outer side of the threaded rod 6 is threadedly connected to the limiting block 8, the size of the limiting groove is adapted to the size of the limiting block 8, the left and right sides of the limiting block 8 are fixedly connected with positioning blocks 9, and the inside of the positioning groove 16 is slidably connected to the outer side of the positioning block 9.

[0029] It should be noted that this makes it convenient to replace the drill tip 3 when it is damaged, avoiding the need to replace the entire three-edge drill bit, reducing the use cost, and further increasing the service life of the three-edge drill bit.

[0030] In this embodiment, the protective component includes a support rod 10 fixedly connected to the left side of the drill tip 3, the drill tip 3 is fixedly connected to the right side of the support rod 10, the size of the fixing hole is adapted to the size of the support rod 10, a cavity 11 is opened inside the support rod 10, a connecting pipe 12 is fixedly connected to the top of the support rod 10, a valve 13 is provided on the outside of the connecting pipe 12, a slider 14 is fixedly connected to the front and back sides of the support rod 10, and the inside of the slide groove is slidably connected to the outside of the slider 14.

[0031] It should be noted that the temperature of the drill tip 3 and the three-edge drill body 2 during use is reduced, thereby increasing the service life of the three-edge drill body 2 and the drill tip 3.

[0032] The working principle of the above embodiment is: the three-edged drill bit,

[0033] 1) When in use, open the valve 13, pour the coolant into the cavity 11 through the connecting pipe 12, then close the valve 13, and then insert the support rod 10 into the fixing hole opened in the three-edge drill body 3. By setting the slider 14 and the slide groove, the stability of the support rod 10 during movement is increased, so that the drill tip 3 extends from the right side of the three-edge drill body 2, and then the three-edge drill body 2 is inserted into the box body 1, so that the left side of the support rod 10 abuts against the left inner wall of the box body 1.

[0034] 2) Then turn the handle 15, the handle 15 drives the worm 5 to rotate, the worm 5 drives the worm wheel 7 to rotate, the worm wheel 7 drives the threaded rod 6 to rotate, and the threaded rod 6 drives the limit block 8 to move. By setting the positioning block 9 and the positioning groove 16, the stability of the limit block 8 during movement is increased, so that the two limit blocks 8 move relative to each other and are inserted into the limit grooves provided on the three-blade drill body 2, so that the three-blade drill body 2 is fixed inside the box body 1, and then the drill tip 3 is installed inside the three-blade drill body 2, so that it is convenient to replace the drill tip 3 when it is damaged, avoiding the replacement of the entire three-blade drill, reducing the use cost, and thus increasing the service life of the three-blade drill.

[0035] 3) By providing a coolant, the drill tip 3 and the three-edged drill body 2 are heat-dissipated, thereby reducing the temperature of the drill tip 3 and the three-edged drill body 2 during use, thereby increasing the service life of the three-edged drill body 2 and the drill tip 3, facilitating the use of the user, and improving the practicality of the three-edged drill.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] 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 three-edged drill bit, comprising a housing (1), characterized in that: The interior of the box (1) is slidably connected with a three-edged drill body (2), the box (1) is provided with two limit mechanisms, and the three-edged drill body (2) is provided with a protective component; The limiting mechanism comprises a cabin (4) fixedly connected to the box body (1); a worm (5) is rotatably connected between the left and right sides of the inner wall of the cabin (4); a threaded rod (6) is rotatably connected inside the cabin (4); a worm wheel (7) matched with the worm is fixedly connected to the outer side of the threaded rod (6); a limiting block (8) is threadedly connected to the outer side of the threaded rod (6); and positioning blocks (9) are fixedly connected to the left and right sides of the limiting block (8).

2. A three-edged drill bit according to claim 1, characterized in that: The protection component comprises a support rod (10) fixedly connected to the left side of the drill tip (3); the right side of the support rod (10) is fixedly connected to the drill tip (3); a cavity (11) is provided inside the support rod (10); a connecting pipe (12) is fixedly connected to the top of the support rod (10); a valve (13) is provided on the outside of the connecting pipe (12); and a slider (14) is fixedly connected to the front and back sides of the support rod (10).

3. A three-edged drill bit according to claim 1, characterized in that: A handle (15) for easy rotation is fixedly connected to the left side of the worm (5).

4. A three-edged drill bit according to claim 1, characterized in that: Positioning grooves (16) are provided on both left and right sides of the inner wall of the cabin body (4), and the interior of the positioning groove (16) is slidably connected to the outer side of the positioning block (9).

5. A three-edged drill bit according to claim 2, characterized in that: A fixing hole is provided inside the three-edged drill bit body (2), and the size of the fixing hole is adapted to the size of the support rod (10).

6. A three-edge drill bit according to claim 1, characterized in that: The top and bottom of the three-edged drill bit body (2) are both provided with limiting grooves, and the size of the limiting grooves is adapted to the size of the limiting blocks (8).

7. A three-edged drill bit according to claim 1, characterized in that: A circular through hole is provided on the right side of the box body (1), and the size of the circular through hole is adapted to the size of the three-edged drill body (2).

8. A three-edged drill bit according to claim 2, characterized in that: A sliding groove is provided inside the three-edged drill bit body (2), and the inside of the sliding groove is slidably connected to the outside of the sliding block (14).

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