Five-tool-bit five-pit drill bit
By designing a five-cut drill bit with five-pit drill bit, using a "one" shape blade and specific structure, the problem of cutting head fracture during drilling is solved, and the service life and chip removal smoothness is improved.
Patent Information
- Application Number
- CN202421228042.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
When the existing four-edge and five-pit electric hammer drill bit breaks the steel bars in the concrete during the drilling process, the chance of the cutting head breaking is high, resulting in a reduced service life.
A five-cut drill bit is designed. The blade of the knife head is in a "one" shape, and the strength and service life of the knife head are improved through specific guide grooves and connecting groove structures.
Effectively breaking the steel bars in the concrete reduces the chance of cutting heads breaking, improves the average service life of five-cut drill bits, and maintains the smoothness of chip removal.
Smart Images
Figure CN222679613U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electric hammer drill bits, and in particular relates to a five-blade five-pit drill bit. Background Art
[0002] The prior patent CN 210080801 U, entitled "A Four-edge Five-pit Electric Hammer Drill Bit" owned by the holding subsidiary (Hangzhou Lichang Tools Co., Ltd.) of the holding parent company (Hangzhou Jinzuan Tools Co., Ltd.) of the applicant, includes an electric hammer drill bit, wherein the end face of the electric hammer drill bit has a single-piece K-shaped double-edged blade head in the blade head, and the single-piece K-shaped double-edged blade head is an inverted V-shaped structure with a convex middle when viewed from the side, and the small alloy single-edged blade head on the left and the small alloy single-edged blade head on the right are respectively located on both sides of the single-piece K-shaped double-edged blade head. The small alloy single-edged blade head on the left and the small alloy single-edged blade head on the right are inverted V-shaped structures when viewed from the side. The drill handle of the electric hammer drill bit has three pits and two grooves. Although this kind of four-edge five-pit electric hammer drill bit can effectively break the steel bars in the concrete during the process of drilling holes in the concrete, due to the current four-blade structure, the probability of the blade breaking when hitting the steel bars is relatively high, thereby reducing the average service life of a four-blade five-pit electric hammer drill bit. Utility Model Content
[0003] Design purpose: In order to avoid the shortcomings of the background technology, a five-blade five-pit drill bit is designed that can not only drill holes in concrete, but also effectively break the steel bars in the concrete during the drilling process, while having a longer service life and smooth chip removal.
[0004] Design plan: To achieve the above design objectives.
[0005] 1. The outer end of the drill bit section is a conical end and a first guide groove, a second guide groove, a third guide groove, a fourth guide groove and a fifth guide groove are provided on the conical surface of the conical end; a first cutter head is formed between the first guide groove and the second guide groove and the blade of the first cutter head is in the shape of a straight line, a second cutter head is formed between the second guide groove and the third guide groove and the blade of the second cutter head is in the shape of a straight line, a third cutter head is formed between the third guide groove and the fourth guide groove and the blade of the third cutter head is in the shape of a straight line, a fourth cutter head is formed between the fourth guide groove and the fifth guide groove and the blade of the fourth cutter head is in the shape of a straight line, a fifth cutter head is formed between the fifth guide groove and the first guide groove and the blade of the fifth cutter head is in the shape of a straight line; the drill bit A first connecting groove, a second connecting groove and a third connecting groove are provided on one side of the outer circumferential surface of the cylinder in the segment, and one end of the first connecting groove, one end of the second connecting groove and one end of the third connecting groove are respectively connected to the spiral chip groove one, the other end of the first connecting groove is connected to the first guide groove, the other end of the second connecting groove is connected to the second guide groove, and the other end of the third connecting groove is connected to the third guide groove. A fourth connecting groove and a fifth connecting groove are provided on the other side of the outer circumferential surface of the cylinder, and one end of the fourth connecting groove and one end of the fifth connecting groove are respectively connected to the spiral chip groove two, the other end of the fourth connecting groove is connected to the fourth guide groove, and the other end of the fifth connecting groove is connected to the fifth guide groove. This design is one of the technical features of the utility model.The purpose of such design is that: the outer end of the drill bit section is a conical end and a first guide groove, a second guide groove, a third guide groove, a fourth guide groove and a fifth guide groove are provided on the conical surface of the conical end; a first cutter head is formed between the first guide groove and the second guide groove and the blade of the first cutter head is in the shape of a letter "I", a second cutter head is formed between the second guide groove and the third guide groove and the blade of the second cutter head is in the shape of a letter "I", a third cutter head is formed between the third guide groove and the fourth guide groove and the blade of the third cutter head is in the shape of a letter "I", and the fourth A fourth cutter head is formed between the guide groove and the fifth guide groove, and the blade of the fourth cutter head is in the shape of an "I", and a fifth cutter head is formed between the fifth guide groove and the first guide groove, and the blade of the fifth cutter head is in the shape of an "I"; one side of the outer circumferential surface of the cylinder in the drill bit section is provided with a first connecting groove, a second connecting groove and a third connecting groove, and one end of the first connecting groove, one end of the second connecting groove and one end of the third connecting groove are respectively connected to the spiral chip removal groove, the other end of the first connecting groove is connected to the first guide groove, and the other end of the second connecting groove is connected to the second guide groove The other end of the third connecting groove is connected to the third guide groove. The other side of the outer circumferential surface of the cylinder is provided with a fourth connecting groove and a fifth connecting groove, and one end of the fourth connecting groove and one end of the fifth connecting groove are respectively connected to the spiral chip groove 2. The other end of the fourth connecting groove is connected to the fourth guide groove, and the other end of the fifth connecting groove is connected to the fifth guide groove. The total length of the electric hammer drill body is 500mm-540mm, wherein the length of the drill handle section is 130mm-150mm, and the diameter of the drill handle section is 14m m-18mm; the diameter of the drill rod section is 18mm-22mm, the groove widths of the spiral chip groove one and the spiral chip groove two are both 12mm-16mm, and the groove depths of the spiral chip groove one and the spiral chip groove two are both 2.5mm-3.5mm. A five-blade five-pit drill bit with such a structure can not only drill holes in concrete, but also effectively break the steel bars in the concrete during the drilling process. At the same time, the setting of the five blades can greatly reduce the probability of blade breakage, thereby increasing the average service life of a five-blade five-pit drill bit.
[0006] 2. The angle between the blade of the first I-shaped cutter head and the blade of the second I-shaped cutter head is 60°, the angle between the blade of the second I-shaped cutter head and the blade of the third I-shaped cutter head is 60°, the angle between the blade of the third I-shaped cutter head and the blade of the fourth I-shaped cutter head is 60°, the angle between the blade of the fourth I-shaped cutter head and the blade of the fifth I-shaped cutter head is 90°, and the angle between the blade of the fifth I-shaped cutter head and the blade of the first I-shaped cutter head is 90°. This design is the second technical feature of the present utility model. The purpose of such design is that the angle between the blade of the first cutter head in the shape of a line and the blade of the second cutter head in the shape of a line is 60°, the angle between the blade of the second cutter head in the shape of a line and the blade of the third cutter head in the shape of a line is 60°, the angle between the blade of the third cutter head in the shape of a line and the blade of the fourth cutter head in the shape of a line is 60°, the angle between the blade of the fourth cutter head in the shape of a line and the blade of the fifth cutter head in the shape of a line is 90°, and the angle between the blade of the fifth cutter head in the shape of a line and the blade of the first cutter head in the shape of a line is 90°. In this way, while effectively improving the average service life of a five-cutter head five-pit drill bit, the chip removal effect and chip removal smoothness of a five-cutter head five-pit drill bit are almost the same as those of an existing four-cutter five-pit electric hammer drill bit.
[0007] 3. The outer circumferential surface of the drill shank section is provided with a plurality of first keyways, and the first keyways extend outwardly through the outer end surface of the drill shank section, and the outer circumferential surface of the drill shank section is provided with a plurality of second keyways, which is the third technical feature of the present utility model. The purpose of such a design is that the outer circumferential surface of the drill shank section is provided with a plurality of first keyways, and the first keyways extend outwardly through the outer end surface of the drill shank section, and the outer circumferential surface of the drill shank section is provided with a plurality of second keyways, so that a five-blade five-pit drill bit can be used in conjunction with an electric hammer matching the first keyways, and can also be used in conjunction with an electric hammer matching the second keyways, thereby improving the applicability of a five-blade five-pit drill bit.
[0008] 4. A truncated cone-shaped transition section is provided between the drill rod section and the drill handle section, and the diameter of the wide end face of the transition section matches the diameter of the drill rod section, and the diameter of the narrow end face of the transition section matches the diameter of the drill handle section. This is the fourth technical feature of the present utility model. The purpose of this design is that a truncated cone-shaped transition section is provided between the drill rod section and the drill handle section, and the diameter of the wide end face of the transition section matches the diameter of the drill rod section, and the diameter of the narrow end face of the transition section matches the diameter of the drill handle section. The setting of the transition section can avoid the sharp angle between the drill rod section and the drill handle section from injuring people or objects.
[0009] Technical solution: A five-cutter five-pit drill bit, comprising an electric hammer drill bit body, wherein the electric hammer drill bit body is composed of a drill bit section, a drill rod section and a drill shank section, and the drill bit section, the drill rod section and the drill shank section are in an integral structure, a spiral chip groove one and a spiral chip groove two are provided on the rod body of the drill rod section, the outer end of the drill bit section is a conical end, and a first guide groove, a second guide groove, a third guide groove, a fourth guide groove and a fifth guide groove are provided on the conical surface of the conical end; a first cutter head is formed between the first guide groove and the second guide groove, and the blade of the first cutter head is in the shape of an "I", a second cutter head is formed between the second guide groove and the third guide groove, and the blade of the second cutter head is in the shape of an "I", a third cutter head is formed between the third guide groove and the fourth guide groove, and the blade of the third cutter head is in the shape of an "I", a fourth cutter head is formed between the fourth guide groove and the fifth guide groove, and the The blades of the four cutter heads are in the shape of an "I", and a fifth cutter head is formed between the fifth guide groove and the first guide groove, and the blade of the fifth cutter head is in the shape of an "I"; one side of the outer cylindrical surface of the cylinder in the drill bit section is provided with a first connecting groove, a second connecting groove and a third connecting groove, and one end of the first connecting groove, one end of the second connecting groove and one end of the third connecting groove are respectively connected to the spiral chip groove one, the other end of the first connecting groove is connected to the first guide groove, the other end of the second connecting groove is connected to the second guide groove, and the other end of the third connecting groove is connected to the third guide groove; the other side of the outer cylindrical surface of the cylinder is provided with a fourth connecting groove and a fifth connecting groove, and one end of the fourth connecting groove and one end of the fifth connecting groove are respectively connected to the spiral chip groove two, the other end of the fourth connecting groove is connected to the fourth guide groove, and the other end of the fifth connecting groove is connected to the fifth guide groove.
[0010] Compared with the background technology, the utility model has the following advantages: firstly, the five-blade five-hole drill bit can not only drill holes in concrete, but also effectively break the steel bars in the concrete during the drilling process, and has a longer service life; secondly, the five-blade five-hole drill bit has smoother chip removal. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The present invention is a structural schematic diagram of a five-segment five-pit drill bit.
[0012] Figure 2 The diagram is a top view of the structure of a five-segment five-pit drill bit. DETAILED DESCRIPTION
[0013] Example 1: Refer to the attached Figure 1-Figure 2A five-segment five-hole drill bit, comprising an electric hammer drill bit body 1, the electric hammer drill bit body 1 is composed of a drill bit section 11, a drill rod section 12 and a drill shank section 13, and the drill bit section 11, the drill rod section 12 and the drill shank section 13 are in an integral structure, the drill rod section 12 is provided with a spiral chip removal groove 121 and a spiral chip removal groove 2 122 on the rod body, the outer end of the drill bit section 11 is a conical end, and a first guide groove 110, a second guide groove 111, a third guide groove 112, a fourth guide groove 113 are provided on the conical surface of the conical end A first blade 115 is formed between the first guide groove 110 and the second guide groove 111, and the blade of the first blade 115 is in the shape of a straight line. A second blade 116 is formed between the second guide groove 111 and the third guide groove 112, and the blade of the second blade 116 is in the shape of a straight line. A third blade 117 is formed between the third guide groove 112 and the fourth guide groove 113, and the blade of the third blade 117 is in the shape of a straight line. The fourth guide groove 113 and the fifth guide groove 114 are provided with a first blade 115 between the first guide groove 110 and the second guide groove 111, and the blade of the first blade 115 is in the shape of a straight line. A fourth cutter head 118 is formed between the guide grooves 114, and the blade of the fourth cutter head 118 is in the shape of a letter "I", and a fifth cutter head 119 is formed between the fifth guide groove 114 and the first guide groove 110, and the blade of the fifth cutter head 119 is in the shape of a letter "I"; a first connecting groove, a second connecting groove and a third connecting groove are provided on one side of the outer circumferential surface of the cylinder in the drill bit section 11, and one end of the first connecting groove, one end of the second connecting groove and one end of the third connecting groove are respectively connected to the spiral chip removal groove 121, and the first connecting groove The other end of the second connecting groove is connected to the first guide groove 110, the other end of the second connecting groove is connected to the second guide groove 111, the other end of the third connecting groove is connected to the third guide groove 112, and a fourth connecting groove and a fifth connecting groove are provided on the other side of the outer circumferential surface of the cylinder, and one end of the fourth connecting groove and one end of the fifth connecting groove are respectively connected to the spiral chip groove 122, the other end of the fourth connecting groove is connected to the fourth guide groove 113, and the other end of the fifth connecting groove is connected to the fifth guide groove 114. The angle between the blade of the first I-shaped blade head 115 and the blade of the second I-shaped blade head 116 is 60°, the angle between the blade of the second I-shaped blade head 116 and the blade of the third I-shaped blade head 117 is 60°, the angle between the blade of the third I-shaped blade head 117 and the blade of the fourth I-shaped blade head 118 is 60°, the angle between the blade of the fourth I-shaped blade head 118 and the blade of the fifth I-shaped blade head 119 is 90°, and the angle between the blade of the fifth I-shaped blade head 119 and the blade of the first I-shaped blade head 115 is 90°.
[0014] The outer circumferential surface of the drill shank section 13 is provided with a plurality of first key grooves 131, and the first key grooves 131 extend outwardly through the outer end surface of the drill shank section 13, and the outer circumferential surface of the drill shank section 13 is provided with a plurality of second key grooves 132. A truncated cone-shaped transition section 14 is provided between the drill rod section 12 and the drill shank section 13, and the diameter of the wide end surface of the transition section 14 matches the diameter of the drill rod section 12, and the diameter of the narrow end surface of the transition section 14 matches the diameter of the drill shank section 13.
[0015] The total length of the electric hammer drill body 1 is 500mm-540mm, wherein the length of the drill shank section 13 is 130mm-150mm, and the diameter of the drill shank section 13 is 14mm-18mm; the diameter of the drill rod section 12 is 18mm-22mm, the groove widths of the spiral chip groove 1 121 and the spiral chip groove 2 122 are both 12mm-16mm, and the groove depths of the spiral chip groove 1 121 and the spiral chip groove 2 122 are both 2.5mm-3.5mm. Preferably, the total length of the electric hammer drill body 1 is 520 mm, wherein the length of the drill shank section 13 is 140 mm, and the diameter of the drill shank section 13 is 16 mm; the diameter of the drill rod section 12 is 20 mm, the groove widths of the spiral chip groove 1 121 and the spiral chip groove 2 122 are both 14 mm, and the groove depths of the spiral chip groove 1 121 and the spiral chip groove 2 122 are both 3.0 mm.
[0016] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of the present utility model, these textual descriptions are only simple textual descriptions of the design concept of the present utility model, rather than limitations on the design concept of the present utility model. Any combination, addition or modification that does not exceed the design concept of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A five-segment five-hole drill bit, comprising an electric hammer drill bit body (1), the electric hammer drill bit body (1) being composed of a drill bit section (11), a drill rod section (12) and a drill shank section (13), and the drill bit section (11), the drill rod section (12) and the drill shank section (13) being an integral structure, the drill rod section (12) being provided with a first spiral chip removal groove (121) and a second spiral chip removal groove (122) on the rod body, wherein: The outer end of the drill bit section (11) is a conical end, and a first guide groove (110), a second guide groove (111), a third guide groove (112), a fourth guide groove (113), and a fifth guide groove (114) are provided on the conical surface of the conical end; a first cutter head (115) is formed between the first guide groove (110) and the second guide groove (111), and the blade of the first cutter head (115) is in the shape of a letter "I", and the second guide groove (111) and the third guide groove (112) are provided on the conical surface of the drill bit section (11); A second blade head (116) is formed between the third guide groove (112) and the blade of the second blade head (116) is in the shape of a letter "I", a third blade head (117) is formed between the third guide groove (112) and the fourth guide groove (113) and the blade of the third blade head (117) is in the shape of a letter "I", a fourth blade head (118) is formed between the fourth guide groove (113) and the fifth guide groove (114) and the blade of the fourth blade head (118) is in the shape of a letter "I", and the fifth guide groove (114) is formed between the third guide groove (112) and the fourth guide groove (113) and the blade of the fourth blade head (118) is in the shape of a letter "I", and the fifth guide groove (114) is formed between the third guide groove (112) and the fourth guide groove (113) and the blade of the third blade head (117) is in the shape of a letter "I". A fifth cutting head (119) is formed between the first guide groove (14) and the first guide groove (110), and the cutting edge of the fifth cutting head (119) is in the shape of a letter "I"; a first connecting groove, a second connecting groove and a third connecting groove are provided on one side of the outer circumferential surface of the cylinder in the drill bit section (11), and one end of the first connecting groove, one end of the second connecting groove and one end of the third connecting groove are respectively connected to the spiral chip removal groove one (121), the other end of the first connecting groove is connected to the first guide groove (110), the other end of the second connecting groove is connected to the second guide groove (111), and the other end of the third connecting groove is connected to the third guide groove (112); a fourth connecting groove and a fifth connecting groove are provided on the other side of the outer circumferential surface of the cylinder, and one end of the fourth connecting groove and one end of the fifth connecting groove are respectively connected to the spiral chip removal groove two (122), the other end of the fourth connecting groove is connected to the fourth guide groove (113), and the other end of the fifth connecting groove is connected to the fifth guide groove (114).
2. The five-segment five-pit drill bit according to claim 1, characterized in that: The angle between the blade of the first blade head (115) in the shape of an I and the blade of the second blade head (116) in the shape of an I is 60°, the angle between the blade of the second blade head (116) in the shape of an I and the blade of the third blade head (117) in the shape of an I is 60°, the angle between the blade of the third blade head (117) in the shape of an I and the blade of the fourth blade head (118) in the shape of an I is 60°, the angle between the blade of the fourth blade head (118) in the shape of an I and the blade of the fifth blade head (119) in the shape of an I is 90°, and the angle between the blade of the fifth blade head (119) in the shape of an I and the blade of the first blade head (115) in the shape of an I is 90°.
3. The five-segment five-pit drill bit according to claim 1, characterized in that: A plurality of first key grooves (131) are provided on the outer circumferential surface of the drill shank section (13), and the first key grooves (131) extend outwardly through the outer end surface of the drill shank section (13), and a plurality of second key grooves (132) are provided on the outer circumferential surface of the drill shank section (13).
4. The five-segment five-pit drill bit according to claim 1, characterized in that: A truncated cone-shaped transition section (14) is provided between the drill rod section (12) and the drill shank section (13); the diameter of the wide end surface of the transition section (14) matches the diameter of the drill rod section (12), and the diameter of the narrow end surface of the transition section (14) matches the diameter of the drill shank section (13).
5. The five-segment five-pit drill bit according to claim 1, characterized in that: The total length of the electric hammer drill body (1) is 500 mm-540 mm, wherein the length of the drill shank section (13) is 130 mm-150 mm, and the diameter of the drill shank section (13) is 14 mm-18 mm; the diameter of the drill rod section (12) is 18 mm-22 mm, the groove widths of the spiral chip groove 1 (121) and the spiral chip groove 2 (122) are both 12 mm-16 mm, and the groove depths of the spiral chip groove 1 (121) and the spiral chip groove 2 (122) are both 2.5 mm-3.5 mm.
6. The five-segment five-pit drill bit according to claim 5, characterized in that: The total length of the electric hammer drill body (1) is 520 mm, wherein the length of the drill shank section (13) is 140 mm, and the diameter of the drill shank section (13) is 16 mm; the diameter of the drill rod section (12) is 20 mm, the groove widths of the spiral chip groove 1 (121) and the spiral chip groove 2 (122) are both 14 mm, and the groove depths of the spiral chip groove 1 (121) and the spiral chip groove 2 (122) are both 3.0 mm.