Drill bit for concrete

Abstract

The utility model discloses a drill bit for concrete, which comprises a connecting part, a clamping part, a connecting part and a connecting part, wherein one end of the connecting part is selectively connected with a clamping head of a drill; one end of the drill rod part and the other end of the connecting part are integrally arranged; one end of the drill bit part and the other end of the drill rod part are integrally arranged; the first drilling tools are spirally arranged on the outer side of the drill rod part at equal intervals in the axial direction of the drill rod part; the second drilling tools are spirally arranged on the outer side of the drill bit part at equal intervals in the axial direction of the drill bit part; the third drilling tool is coaxial with the drill bit part and is arranged at the other end of the drill bit part in a cross shape; the multiple second drilling tools and the multiple first drilling tools are collinear in a one-to-one correspondence mode. The utility model has the characteristics of being not easy to block, improving the punching efficiency, reducing the abrasion and prolonging the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, and more particularly, to a drill bit for concrete. Background Art

[0002] Concrete is one of the most important civil engineering materials in contemporary times. Concrete refers to cement as a binder, sand and stone as granular aggregates, mixed with water in a certain proportion, and obtained after uniform stirring. Concrete has the characteristics of high compressive strength and good durability, so it is widely used in various industries.

[0003] However, in actual work, it is often necessary to drill holes in concrete. In the existing technology, impact drills are mostly used for drilling. However, the existing drill bits mostly use vertical chip grooves, which are very easy to get clogged during the drilling process, resulting in serious wear of the drill bit, slow drilling speed, and low drilling efficiency. In more serious cases, the drill bit can no longer be used and will cause a certain degree of damage to the concrete, making it impossible to drill holes in the original position. Utility Model Content

[0004] The utility model designs and develops a drill bit for concrete, which accelerates the drilling efficiency by arranging multiple drill bits, and the spiral structure makes the chip removal groove less likely to be blocked.

[0005] The technical solution provided by this utility model is:

[0006] A drill bit for concrete, comprising:

[0007] A connecting portion, one end of which is selectively connected to a drill chuck;

[0008] a drill rod portion, one end of which is integrally provided with the other end of the connecting portion;

[0009] a drill head, one end of which is integrally provided with the other end of the drill rod;

[0010] a plurality of first drill bits, which are spirally arranged at equal intervals on the outside of the drill rod portion along the axial direction of the drill rod portion;

[0011] a plurality of second drill bits, which are spirally arranged at equal intervals on the outside of the drill head along the axial direction of the drill head;

[0012] a third drill bit, which is coaxial with the drill head and is arranged in a cross shape at the other end of the drill head;

[0013] The plurality of second drill bits and the plurality of first drill bits are collinear and correspond one to one.

[0014] Preferably, the diameters of the drill head and the drill rod gradually increase in a direction extending toward the connecting portion.

[0015] Preferably, the third drill bit and the plurality of second drill bits are arranged in sequence and spaced apart.

[0016] Preferably, it also includes:

[0017] a plurality of stepped drill bits, which are respectively arranged between the plurality of first drill bits and the plurality of second drill bits in a one-to-one correspondence;

[0018] Wherein, the plurality of second drill bits, the plurality of step drill bits and the plurality of first drill bits are arranged in a stepped manner.

[0019] Preferably, the plurality of stepped drill bits are all arranged at the other end of the drill rod portion.

[0020] Preferably, it also includes:

[0021] A plurality of slots, which are respectively arranged on the same cross section of the plurality of first drill bits in a one-to-one correspondence;

[0022] Wherein, the plurality of slots are all arranged along the longitudinal direction of the plurality of first drill bits.

[0023] Preferably, one end of the plurality of first drill bits close to the connecting portion is inclined.

[0024] Preferably, it also includes:

[0025] a protection portion, which is provided at one end of the drill rod portion close to the connecting portion, and an end of the protection portion away from the connecting portion is gradually inclined toward the drill head portion;

[0026] Wherein, the height of the protection portion is lower than the height of the plurality of first drill bits.

[0027] Preferably, the number of the plurality of first drill bits, the plurality of step drill bits and the plurality of second drill bits is four each.

[0028] The beneficial effects of the present invention are as follows:

[0029] The concrete drill bit provided by the utility model accelerates the drilling efficiency by arranging multiple drill bits in combination with a third drill bit. A chip groove is formed between the multiple drill bits. The spiral structure makes the chip groove less likely to be blocked, reduces wear and increases service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a side structural schematic diagram of the concrete drill bit of the utility model.

[0031] Figure 2 This is a schematic diagram of the axonometric structure of the concrete drill bit of the present invention.

[0032] Figure 3This is a schematic structural diagram of the third drill bit of the concrete drill bit of the utility model.

[0033] Figure 4 This is a schematic diagram of the main structure of the concrete drill bit of the utility model. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0035] like Figures 1 to 4 As shown, the utility model provides a drill bit for concrete, comprising:

[0036] The connecting portion 110, the drill rod portion 120 and the drill head portion 130 are coaxially connected in sequence. One end of the connecting portion 110 can be optionally connected to the drill clamping head for replacing the drill bit; one end of the drill rod portion 120 is connected to the other end of the connecting portion 110, and the other end is connected to one end of the drill head portion 130. The diameters of the drill head portion 130 and the diameters of the drill rod portion 120 gradually increase from the end of the drill head portion 130 away from the connecting portion 110 toward the connecting portion 110.

[0037] In this embodiment, the diameter of one end of the connecting portion 110 gradually increases toward the other end of the connecting portion 110 close to the drill rod portion 120, and a step-like structure is formed between the connecting portion 110 and the drill rod portion 120 to increase strength.

[0038] In this embodiment, the connecting portion 110 , the drill rod portion 120 and the drill head portion 130 are integrally formed in sequence.

[0039] A plurality of first drill bits 140 are arranged at equal intervals along the axial direction on the outside of the drill rod portion 120. A plurality of second drill bits 150 are arranged at equal intervals along the axial direction on the outside of the drill head portion 130. A plurality of stepped drill bits 160 are arranged in a one-to-one correspondence between the plurality of first drill bits 140 and the plurality of second drill bits 150. The plurality of first drill bits 140, the plurality of second drill bits 150, and the plurality of stepped drill bits 160 are all spiral-shaped and collinear.

[0040] The multiple second drill bits 150, the multiple step drill bits 160 and the multiple first drill bits 140 are arranged in a stepped manner corresponding to the diameters of the drill head portion 130 and the drill rod portion 120. At this time, the intervals between the multiple first drill bits 140, the multiple second drill bits 150 and the multiple step drill bits 160 are chip grooves.

[0041] In this embodiment, the plurality of stepped drill bits 160 are disposed at the other end of the drill rod portion 120 .

[0042] One end of the plurality of first drill bits 140 close to the connecting portion 110 is inclined toward the connecting portion 110 , and the other end of the plurality of second drill bits 150 close to the drill head 130 is inclined outward.

[0043] A third drill bit 170 is coaxially disposed at the other end of the drill head 130 , and the third drill bit 170 is in a cross-shaped structure.

[0044] In this embodiment, the third drill bit 170 and the plurality of second drill bits 150 are arranged in sequence and spaced apart, that is, the end of the third drill bit 170 is arranged corresponding to the gap between the second drill bits 150, which facilitates chip removal during drilling.

[0045] In this embodiment, the number of the first drill bit 140 , the number of the second drill bit 150 , and the number of the step drill bit 160 are all four.

[0046] A protective portion 180 is provided at one end of the drill rod portion 120 close to the connecting portion 110. The height of the protective portion 180 is lower than the height of the multiple first drill bits 140. The end of the protective portion 180 away from the connecting portion 110 is arranged in a chip removal groove at intervals and gradually tilted toward the drill head 130, which can prevent chips from splashing toward the drill picking position without blocking chip removal.

[0047] In this embodiment, one end of the protection portion 180 away from the connecting portion 110 extends smoothly toward the drill rod portion 120 .

[0048] A slot 190 is provided along the longitudinal direction of each first drill bit 140 . The depth of the slot 190 is 1 to 2 mm, and all the slots 190 are on the same cross section, so that the drill bit has a buffer during drilling, reducing the impact on the concrete surface.

[0049] The concrete drill bit provided by the utility model can improve the drilling efficiency and reduce wear through the design of multiple drill bits, and can also avoid clogging by concrete chips during the drilling process, thereby increasing the service life.

[0050] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A drill bit for concrete, characterized in that: include: A connecting portion, one end of which is selectively connected to a drill chuck; a drill rod portion, one end of which is integrally provided with the other end of the connecting portion; a drill head, one end of which is integrally provided with the other end of the drill rod; a plurality of first drill bits, which are spirally arranged at equal intervals on the outside of the drill rod portion along the axial direction of the drill rod portion; a plurality of second drill bits, which are spirally arranged at equal intervals on the outside of the drill head along the axial direction of the drill head; a third drill bit, which is coaxial with the drill head and is arranged in a cross shape at the other end of the drill head; The plurality of second drill bits and the plurality of first drill bits are collinear and correspond one to one.

2. The concrete drill bit according to claim 1, wherein: The diameters of the drill head and the drill rod gradually increase in a direction in which they extend toward the connecting portion.

3. The concrete drill bit according to claim 2, wherein: The third drill bit and the plurality of second drill bits are sequentially arranged at intervals.

4. The concrete drill bit according to claim 3, wherein: Also includes: a plurality of stepped drill bits, which are respectively arranged between the plurality of first drill bits and the plurality of second drill bits in a one-to-one correspondence; Wherein, the plurality of second drill bits, the plurality of step drill bits and the plurality of first drill bits are arranged in a stepped manner.

5. The concrete drill bit according to claim 4, wherein: The plurality of stepped drill bits are all arranged at the other end of the drill rod portion.

6. The concrete drill bit according to claim 5, wherein: Also includes: A plurality of slots, which are respectively arranged on the same cross section of the plurality of first drill bits in a one-to-one correspondence; Wherein, the plurality of slots are all arranged along the longitudinal direction of the plurality of first drill bits.

7. The concrete drill bit according to claim 6, wherein: One end of the plurality of first drill bits close to the connecting portion is inclined.

8. The concrete drill bit according to claim 7, wherein: Also includes: a protection portion, which is provided at one end of the drill rod portion close to the connecting portion, and an end of the protection portion away from the connecting portion is gradually inclined toward the drill head portion; Wherein, the height of the protection portion is lower than the height of the plurality of first drill bits.

9. The concrete drill bit according to claim 8, wherein: The number of the plurality of first drill bits, the plurality of step drill bits and the plurality of second drill bits are all four.

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