CN221018820U - Connection structure and drill bit - Google Patents
Connection structure and drill bit Download PDFInfo
- Publication number
- CN221018820U CN221018820U CN202323020229.5U CN202323020229U CN221018820U CN 221018820 U CN221018820 U CN 221018820U CN 202323020229 U CN202323020229 U CN 202323020229U CN 221018820 U CN221018820 U CN 221018820U
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- region
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- engagement member
- connecting piece
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- 238000001816 cooling Methods 0.000 claims description 30
- 238000009826 distribution Methods 0.000 claims description 11
- 230000013011 mating Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005304 joining Methods 0.000 description 9
- 238000007599 discharging Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Drilling Tools (AREA)
Abstract
The utility model discloses a connecting structure and a drill bit, which relate to the technical field of drill bits and comprise the following components: a first engagement member; the positioning column is connected to the first connecting piece and is provided with a flat part; a second engagement member engaged with the first engagement member; the positioning hole and the threaded hole are formed in the second connecting piece, the positioning column is communicated with the threaded hole, and the positioning hole is matched with the positioning column; the locking piece is in threaded connection with the threaded hole, the locking piece is in contact with the flat part, and an included angle alpha 1 between the central line of the locking piece and the flat part is larger than 90 degrees; the first limiting area is connected to the first connecting piece; the second limiting area is connected to the second connecting piece; wherein, first spacing district and second spacing district cooperation. The utility model has the technical effect that the torque transmission performance between the two engagement members is good.
Description
Technical Field
The utility model relates to the technical field of drill bits, in particular to a connecting structure and a drill bit.
Background
The drill bit is a rotary machining tool for drilling or reaming, has the advantage of good hole machining performance, and is widely used in the field of hole machining.
The drill bit generally comprises a cutter head and a cutter bar, and in order to facilitate the replacement of the cutter head, the cutter head and the cutter bar of the related drill bit are generally detachably connected, but the detachable connection easily causes the relative rotation of the cutter head and the cutter bar, so that the torque transmission performance between the cutter head and the cutter bar is poor.
Disclosure of utility model
The utility model provides a connecting structure with good torque transmission performance between two connecting pieces.
In order to solve the problems, the technical scheme provided by the utility model is as follows:
a splice structure comprising:
a first engagement member;
The positioning column is connected to the first connecting piece and is provided with a flat part;
a second engagement member engaged with the first engagement member;
the positioning hole and the threaded hole are formed in the second connecting piece, the positioning column is communicated with the threaded hole, and the positioning hole is matched with the positioning column;
The locking piece is in threaded connection with the threaded hole, the locking piece is in contact with the flat part, and an included angle alpha 1 between the central line of the locking piece and the flat part is larger than 90 degrees;
the first limiting area is connected to the first connecting piece;
the second limiting area is connected to the second connecting piece;
wherein the first limit region is matched with the second limit region.
Optionally, one of the first limit area and the second limit area is a limit groove, and the other is a limit protrusion, and the limit groove is matched with the limit protrusion.
Optionally, when the first limiting region is a limiting groove, the second limiting region is a limiting protrusion, the engagement structure further includes a tapered portion connected to one end of the second limiting region away from the first engagement member, the tapered portion gradually increases in size along the direction from the second engagement member to the second limiting region, the first limiting region includes a first region and a second region that are mutually communicated, the size of the first region is greater than the size of the second region, and the tapered portion is matched with the first region or the second region.
Optionally, the first limiting area further comprises a slot, and the slot is communicated with the first area.
Optionally, the engagement between the taper and the second region is an interference fit.
Optionally, an included angle α 1 between the center line of the locking member and the flat portion ranges from 91 ° to 95 °.
A drill bit comprising an engagement structure, the first engagement member configured as a bit and the second engagement member configured as a bit shaft, further comprising:
the center blade and the outer blade are detachably connected to the cutter head;
a guide block detachably connected to the cutter head;
the first chip removal groove and the auxiliary chip removal groove are respectively arranged on the cutter head and are communicated;
The second chip groove is arranged on the cutter bar and is communicated with the first chip groove.
Optionally, the number of the outer blades is at least one, and when the number of the outer blades is at least two, at least two outer blades are uniformly distributed along the circumferential direction of the cutter head.
Optionally, the number of the guide blocks is at least one, and when the number of the guide blocks is at least two, at least two guide blocks are uniformly distributed along the circumferential direction of the cutter head.
Optionally, the method further comprises:
the first cooling channels are correspondingly communicated with the central blade and the outer blade;
The device comprises a main cooling channel, a distribution channel and a plurality of second sub cooling channels which are all arranged in the cutter bar, wherein one end of the distribution channel is communicated with the main cooling channel, the other end of the distribution channel is communicated with the plurality of second sub cooling channels, and the plurality of second sub cooling channels are correspondingly communicated with the plurality of first sub cooling channels.
Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: because retaining member and flat contact, be convenient for make first linking member and second linking member realize axial positioning, again because contained angle alpha 1 between the central line of retaining member and the flat is greater than 90, be equivalent to the central line of retaining member and flat not perpendicular, be convenient for make at the contact in-process of retaining member and flat, the retaining member drives the reference column slightly rotate, thereby drive first linking member and the slight rotation in first spacing district, and then make first spacing district and the tight cooperation in second spacing district, be convenient for make first linking member and second linking member realize circumference location, prevent that first linking member and second linking member from taking place relative rotation, guarantee that torque transmission performance between first linking member and the second linking member is good.
Drawings
Fig. 1 is a schematic structural diagram of a drill bit according to an embodiment of the present utility model;
FIG. 2 is a partial view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is an exploded view of a drill bit according to an embodiment of the present utility model;
FIG. 5 is a partial view of FIG. 4;
FIG. 6 is a partial cross-sectional view of one embodiment of the present utility model showing a drill bit;
FIG. 7 is a schematic diagram of a first engaging member according to an embodiment of the present utility model;
FIG. 8 is a partial view of a second engagement member according to an embodiment of the present utility model;
FIG. 9 is a second schematic view of a first engaging member according to the embodiment of the present utility model;
FIG. 10 is a second partial view of a second engagement member according to an embodiment of the present utility model;
FIG. 11 is a bottom view of the first engagement member according to the embodiment of the present utility model;
FIG. 12 is a top view of a second engagement member according to an embodiment of the present utility model;
FIG. 13 is a second partial cross-sectional view of a drill bit according to an embodiment of the present utility model;
FIG. 14 is a third partial cross-sectional view of a drill bit according to an embodiment of the present utility model;
In the figure: 1. a first engagement member; 11. positioning columns; 12. a flat part; 13. a first junk slot; 14. an auxiliary chip removal groove; 15. v-shaped positioning grooves; 16. a first sub-cooling passage; 2. a second engagement member; 21. positioning holes; 22. a threaded hole; 23. a second junk slot; 24. a main cooling channel; 25. a distribution channel; 26. a second sub-cooling passage; 3. a locking member; 4. a first limit region; 41. a first zone; 42. a second zone; 43. slotting; 5. the second limit area; 51. a tapered portion; 6. a center blade; 7. an outer blade; 8. and a guide block.
Detailed Description
For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the utility model are shown in the drawings. The first, second, etc. words are provided for convenience in describing the technical scheme of the present utility model, and have no specific limitation, and are all generic terms, and do not constitute limitation to the technical scheme of the present utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The technical schemes in the same embodiment and the technical schemes in different embodiments can be arranged and combined to form a new technical scheme without contradiction or conflict, which is within the scope of the utility model.
Example 1
With reference to fig. 1-14, this embodiment provides a linking structure, including:
A first engagement member 1;
the positioning column 11 is connected to the first connecting piece 1, and a flat part 12 is arranged on the positioning column 11;
a second engagement member 2 engaged with the first engagement member 1;
The positioning hole 21 and the threaded hole 22 are formed in the second connecting piece 2, the positioning column 11 is communicated with the threaded hole 22, and the positioning hole 21 is matched with the positioning column 11;
the locking piece 3 is in threaded connection with the threaded hole 22, the locking piece 3 is in contact with the flat part 12, and an included angle alpha 1 between the central line of the locking piece 3 and the flat part 12 is larger than 90 degrees;
A first limiting zone 4 connected to the first engagement member 1;
the second limiting area 5 is connected to the second connecting piece 2;
Wherein the first limit area 4 is matched with the second limit area 5.
Specifically, the first connecting piece 1 and the second connecting piece 2 can be a cutter head, a cutter bar, a wrench head, a wrench handle or the like, when the connecting structure is used for a drill bit, the first connecting piece 1 is the cutter head, and the second connecting piece 2 is the cutter bar; the positioning column 11 is matched with the positioning hole 21, so that the first connecting piece 1 and the second connecting piece 2 can be positioned in the radial direction conveniently; because retaining member 3 and flat 12 contact, be convenient for make first joining member 1 and second joining member 2 realize axial positioning, again because contained angle alpha 1 between the central line of retaining member 3 and the flat 12 is greater than 90, be equivalent to the central line of retaining member 3 and flat 12 not perpendicular, be convenient for make in the contact process of retaining member 3 and flat 12, retaining member 3 drives the slight rotation of reference column 11, thereby drive first joining member 1 and the slight rotation of first spacing district 4, and then make first spacing district 4 and the tight cooperation of second spacing district 5, be convenient for make first joining member 1 and second joining member 2 realize circumferential positioning, prevent that first joining member 1 and second joining member 2 from taking place relative rotation, guarantee that torque transmission performance between first joining member 1 and the second joining member 2 is good.
Further, as shown in fig. 10-12, one of the first limiting area 4 and the second limiting area 5 is a limiting groove, and the other is a limiting protrusion, and the limiting groove is matched with the limiting protrusion.
Specifically, the number of the first limiting areas 4 and the second limiting areas 5 is at least two, at least two first limiting areas 4 are uniformly distributed along the circumferential direction of the first connecting piece 1, and at least two second limiting areas 5 are uniformly distributed along the circumferential direction of the second connecting piece 2; the two first limit areas 4 are limit grooves, and the two second limit areas 5 are limit protrusions; it is also possible that at least two first limiting areas 4 are both limiting protrusions and at least two second limiting areas 5 are both limiting grooves; the first limit area 4 may be a limit groove, the corresponding second limit area 5 may be a limit protrusion, the first limit area 4 may be a limit protrusion, and the corresponding second limit area 5 may be a limit groove; preferably, at least two first limiting areas 4 are limiting grooves, and at least two second limiting areas 5 are limiting protrusions.
Further, as shown in fig. 10-12, when the first limiting area 4 is a limiting groove and the second limiting area 5 is a limiting protrusion, the engagement structure further includes a tapered portion 51 connected to an end of the second limiting area 5 away from the first engaging member 1, and the tapered portion 51 gradually increases in size along the direction from the second engaging member 2 to the second limiting area 5, and the first limiting area 4 includes a first area 41 and a second area 42 which are mutually connected, the size of the first area 41 is larger than the size of the second area 42, and the tapered portion 51 is matched with the first area 41 or the second area 42.
Specifically, during the matching, the tapered portion 51 of the second limiting region 5 is first matched with the first region 41 of the first limiting region 4, and then the first connector 1 is rotated, so that the tapered portion 51 of the second limiting region 5 is matched with the second region 42 of the first limiting region 4; because the size of the first area 41 is larger than that of the second area 42, the convenience of matching the conical part 51 of the second limiting area 5 with the first area 41 of the first limiting area 4 is good, the compactness of matching the conical part 51 of the second limiting area 5 with the second area 42 of the first limiting area 4 is good, the first connecting piece 1 and the second connecting piece 2 are convenient to realize circumferential positioning, the first connecting piece 1 and the second connecting piece 2 are prevented from rotating relatively, and the torque transmission performance between the first connecting piece 1 and the second connecting piece 2 is guaranteed to be good; the size of the conical part 51 is gradually increased along the direction from the second connecting piece 2 to the second limiting area 5, so that the fit transition smoothness of the conical part 51 of the second limiting area 5 and the first area 41 of the first limiting area 4 is good.
Further, as shown in fig. 11, the first limiting area 4 further includes a slot 43, and the slot 43 communicates with the first area 41.
In particular, the slot 43 facilitates increasing the elasticity of the first region 41, thereby further facilitating the mating of the tapered portion 51 of the second spacing region 5 with the first region 41 of the first spacing region 4.
Further, as shown in fig. 10-12, the engagement between the taper 51 and the second region 42 is an interference fit.
Specifically, interference fit is convenient for make the toper portion 51 of second spacing district 5 and the second district 42 complex compactness of first spacing district 4 good, and the circumference location is realized to the first linking piece 1 of being convenient for and second linking piece 2, prevents that first linking piece 1 and second linking piece 2 from taking place relative rotation, guarantees that the moment of torsion transmission performance between first linking piece 1 and the second linking piece 2 is good.
Further, as shown in fig. 14, the angle α 1 between the center line of the locking member 3 and the flat portion 12 ranges from 91 ° to 95 °.
Specifically, the included angle α 1 may be 91 °, 93 ° or 95 °.
Example 2
Referring to fig. 1-14, this embodiment provides a drill bit, including an engagement structure in embodiment 1, where the first engagement member 1 is configured as a cutter head, and the second engagement member 2 is configured as a cutter bar, and further including:
The center blade 6 and the outer blade 7 are detachably connected to the cutter head;
A guide block 8 detachably connected to the cutter head;
The first chip removal groove 13 and the auxiliary chip removal groove 14 are arranged on the cutter head, and the first chip removal groove 13 is communicated with the auxiliary chip removal groove 14;
the second chip discharging groove 23 is arranged on the cutter bar, and the second chip discharging groove 23 is communicated with the first chip discharging groove 13.
Specifically, the center blade 6 is used for centering and cutting, the outer blades 7 are used for cutting, the number of the center blades 6 is one, the number of the outer blades 7 is at least one, and the number of the outer blades 7 can be either an odd number or an even number; the center blade 6 and the outer blade 7 are staggered along the circumferential direction of the cutter head, so that the interference between the center blade 6 and the outer blade 7 is prevented; the center blade 6 and the outer blade 7 are partially overlapped along the radial direction of the cutter head, so that the cutting comprehensiveness of the drill is good; along the axial direction of the cutter head, the height of the center blade 6 is larger than that of the outer blade 7, so that the center blade 6 is convenient to center, and meanwhile, the center blade 6 is convenient to be mainly used for drilling, the outer blade 7 is mainly used for reaming, and the drilling and reaming can be finished by only adopting one drill bit; because the center blade 6 and the outer blade 7 are detachably connected with the cutter head, the drill bit realizes modularized design, and is convenient for replacing the center blade 6 and the outer blade 7 with different sizes in time, so that the processing of holes with different diameters is convenient to realize, a plurality of V-shaped positioning grooves 15 can be arranged on the cutter head, and the center blade 6 and the outer blade 7 are correspondingly arranged in the V-shaped positioning grooves 15 and are locked by screws; the guide blocks 8 are used for generating a guide effect, the number of the guide blocks 8 is at least one, and at least one guide block 8 and at least one outer blade 7 are staggered to prevent mutual interference; the first junk slots 13 are for discharging junk from the center blade 6 and the outer blades 7; the auxiliary junk slots 14 are used for discharging junk from the center blade 6, so that the junk discharging space of the center blade 6 is increased; since the first chip groove 13 and the second chip groove 23 communicate, the second chip groove 23 is facilitated to discharge the chips from the first chip groove 13.
Further, as shown in fig. 1 to 5, the number of the outer blades 7 is at least one, and when the number of the outer blades 7 is at least two, at least two outer blades 7 are uniformly distributed along the circumferential direction of the cutter head.
Further, as shown in fig. 1 to 5, the number of the guide blocks 8 is at least one, and when the number of the guide blocks 8 is at least two, the at least two guide blocks 8 are uniformly distributed along the circumferential direction of the cutter head.
Further, as shown in fig. 6, the method further includes:
The first sub-cooling channels 16 are arranged in the cutter head, and the first sub-cooling channels 16 are correspondingly communicated with the center blade 6 and the outer blade 7;
The main cooling channel 24, the distribution channel 25 and the plurality of second sub cooling channels 26 are all arranged in the cutter bar, one end of the distribution channel 25 is communicated with the main cooling channel 24, the other end of the distribution channel 25 is communicated with the plurality of second sub cooling channels 26, and the plurality of second sub cooling channels 26 are correspondingly communicated with the plurality of first sub cooling channels 16.
In particular, during cooling, the cooling fluid passes from the main cooling channel 24 first into the distribution channel 25, then into the plurality of second sub-cooling channels 26 and then into the plurality of first sub-cooling channels 16, thereby facilitating cooling of the center blade 6 and the outer blades 7.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (10)
1. A splice structure comprising:
a first engagement member;
The positioning column is connected to the first connecting piece and is provided with a flat part;
a second engagement member engaged with the first engagement member;
the positioning hole and the threaded hole are formed in the second connecting piece, the positioning column is communicated with the threaded hole, and the positioning hole is matched with the positioning column;
The locking piece is in threaded connection with the threaded hole, the locking piece is in contact with the flat part, and an included angle alpha 1 between the central line of the locking piece and the flat part is larger than 90 degrees;
the first limiting area is connected to the first connecting piece;
the second limiting area is connected to the second connecting piece;
wherein the first limit region is matched with the second limit region.
2. The engagement structure of claim 1, wherein one of the first and second spacing regions is a spacing groove and the other is a spacing protrusion, the spacing groove and the spacing protrusion cooperating.
3. The engagement structure according to claim 2, wherein when the first limiting region is a limiting groove and the second limiting region is a limiting protrusion, the engagement structure further comprises a tapered portion connected to an end of the second limiting region away from the first engagement member, the tapered portion gradually increases in size along a direction from the second engagement member to the second limiting region, the first limiting region comprises a first region and a second region which are communicated with each other, the first region is larger in size than the second region, and the tapered portion is matched with the first region or the second region.
4. A mating structure according to claim 3, wherein said first spacing zone further comprises a slot, said slot communicating with said first zone.
5. A mating structure according to claim 3, wherein the engagement between the tapered portion and the second region is in the form of an interference fit.
6. An engagement structure according to any one of claims 1-5, wherein the angle α 1 between the centre line of the locking member and the flat is in the range 91 ° -95 °.
7. A drill bit comprising an engagement structure according to any one of claims 1-6, said first engagement member being configured as a bit and said second engagement member being configured as a bit shank, further comprising:
the center blade and the outer blade are detachably connected to the cutter head;
a guide block detachably connected to the cutter head;
the first chip removal groove and the auxiliary chip removal groove are respectively arranged on the cutter head and are communicated;
The second chip groove is arranged on the cutter bar and is communicated with the first chip groove.
8. The drill bit of claim 7, wherein the number of outer blades is at least one, and when the number of outer blades is at least two, at least two outer blades are uniformly distributed along the circumference of the bit.
9. The drill bit of claim 7, wherein the number of guide blocks is at least one, and when the number of guide blocks is at least two, at least two guide blocks are uniformly distributed along the circumferential direction of the cutter head.
10. The drill bit of claim 7, further comprising:
the first cooling channels are correspondingly communicated with the central blade and the outer blade;
The device comprises a main cooling channel, a distribution channel and a plurality of second sub cooling channels which are all arranged in the cutter bar, wherein one end of the distribution channel is communicated with the main cooling channel, the other end of the distribution channel is communicated with the plurality of second sub cooling channels, and the plurality of second sub cooling channels are correspondingly communicated with the plurality of first sub cooling channels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323020229.5U CN221018820U (en) | 2023-11-08 | 2023-11-08 | Connection structure and drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323020229.5U CN221018820U (en) | 2023-11-08 | 2023-11-08 | Connection structure and drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221018820U true CN221018820U (en) | 2024-05-28 |
Family
ID=91175863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323020229.5U Active CN221018820U (en) | 2023-11-08 | 2023-11-08 | Connection structure and drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221018820U (en) |
-
2023
- 2023-11-08 CN CN202323020229.5U patent/CN221018820U/en active Active
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