CN204744306U - Tail end disposable drill bit of inflation and drilling tool - Google Patents
Tail end disposable drill bit of inflation and drilling tool Download PDFInfo
- Publication number
- CN204744306U CN204744306U CN201520329546.1U CN201520329546U CN204744306U CN 204744306 U CN204744306 U CN 204744306U CN 201520329546 U CN201520329546 U CN 201520329546U CN 204744306 U CN204744306 U CN 204744306U
- Authority
- CN
- China
- Prior art keywords
- drill bit
- adapter sleeve
- drilling tool
- tail end
- installing hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Drilling Tools (AREA)
Abstract
The utility model relates to a tail end disposable drill bit of inflation and drilling tool, the tail end of drill bit is installed in the drill bit mounting hole of drilling tool, the tail end of drill bit is equipped with the drill bit adapter sleeve the end of drill bit adapter sleeve is followed the axial and is equipped with a plurality of flutings, constitutes a plurality of inflation claws, be equipped with the inflation pressure head that stretches into the drill bit mounting hole in the bottom of the drill bit mounting hole of drilling tool, the drill bit mounting hole is equipped with the extension hole corresponding to the end section of inflation pressure head, and the internal diameter of the anterior segment of drill bit mounting hole and the external diameter sliding fit of drill bit adapter sleeve are equipped with the inflation and keep off the groove on the internal diameter of the anterior segment of drill bit mounting hole, when the drill bit adapter sleeve inserted the drill bit mounting hole, the inflation claw of cone roof pressure drill bit adapter sleeve tail end of inflation pressure head made the inflation claw outwards expand and produces plastic deformation. The beneficial effects of the utility model are that: the production inflation after initial use of the inflation claw of drill bit tail end makes its drill bit mounting hole that can't get into the drilling tool, can effectively stop to be made used drill bit by used repeatedly.
Description
Technical field
This utility model belongs to medical drilling tool, particularly relates to a kind of tail end and to expand disposable drill bit and drilling tool.
Background technology
In order to ensure operation safety and prevent cross infection, Medical bit (as medical skull drill bit) is disposable drill bit, is usually discarded by the drill bit after use, and takes to collect treatment measures, prevents from being reused.But due to the accidental careless omission of management, throw away the drill bit that may discard and be used again, more have some illegal practitioners the discarded drill bit be previously used can be reused, compromise medical safety.
Summary of the invention
The purpose of this utility model proposes a kind of tail end to expand the technical scheme of disposable drill bit and drilling tool, prevents used discarded Medical bit to be used again.
To achieve these goals, the technical solution of the utility model is: a kind of tail end expands disposable drill bit and drilling tool, and described drill bit is the disposable medical drill bit driven by drilling tool, and the tail end of drill bit is arranged in the drill bit installing hole of described drilling tool; The tail end of described drill bit is provided with drill bit adapter sleeve, is provided with multiple fluting vertically in the termination of described drill bit adapter sleeve, makes the termination of drill bit form multiple expansion pawl; Be provided with the expansion pressure head stretching into drill bit installing hole in the bottom of the drill bit installing hole of described drilling tool, the front end of described expansion pressure head is provided with cone; The end section that drill bit installing hole corresponds to expansion pressure head is provided with extending bore, the diameter of described extending bore is greater than the diameter of drill bit adapter sleeve, the internal diameter of the leading portion of drill bit installing hole and the external diameter of drill bit adapter sleeve are slidably matched, and the internal diameter of the leading portion of drill bit installing hole is provided with expansion retaining groove; When drill bit adapter sleeve inserts drill bit installing hole, the expansion pawl of the cone top pressure drill bit adapter sleeve tail end of described expansion pressure head, makes expansion pawl expand outwardly and produce plastic deformation.
Further, in order to make expansion pawl expand smoothly, the diameter of the extending bore of described drilling tool is greater than the external diameter at least 2mm of drill bit adapter sleeve.
Further, drill bit installing hole can be inserted smoothly to make the drill bit adapter sleeve with expansion pawl, and the plastic deformation making expansion pawl produce is enough to stop drill bit to be reinserted in drilling tool, the fit clearance between the internal diameter of the leading portion of described drill bit installing hole and the external diameter of drill bit adapter sleeve is not more than 0.2mm.
Further, in order to make the expansion pawl after expansion do not inserted in drilling tool after manual compression easily, the distance of the entrance of the notch distance installing hole of expansion retaining groove inside installing hole of described drilling tool is not less than the diameter of drill bit installing hole.
Further, enough plastic deformations can be produced to make the expansion pawl of drill bit, and can extract from drilling tool easily after use terminates, the material of the drill bit adapter sleeve of the tail end of described drill bit is engineering plastics, the wall thickness of the drill bit adapter sleeve of the tail end of drill bit is 1.0mm ~ 1.5mm, and the external diameter of the expansion pressure head of described drilling tool is greater than the internal diameter at least 0.6mm of drill bit adapter sleeve.
The beneficial effects of the utility model are: the expansion pawl of Medical bit tail end after being used first, produce expansion, make it cannot enter the drill bit installing hole of drilling tool, be more difficult to by expansion retaining groove, can effectively stop used drill bit to be reused.
Below in conjunction with drawings and Examples, this utility model is described in detail.
Accompanying drawing explanation
Fig. 1 is this utility model drill bit and drilling tool outline drawing;
Fig. 2 is this utility model drill bit structure figure;
Fig. 3 is this utility model drilling tool broken section enlarged drawing;
Fig. 4 is that this utility model drill bit installs broken section enlarged drawing;
Fig. 5 be this utility model drill bit after a procedure expansion pawl expansion structure chart.
Detailed description of the invention
As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, a kind of tail end expands disposable drill bit and drilling tool, and described drill bit is the disposable medical drill bit 10 driven by drilling tool, and the tail end of drill bit is arranged in the drill bit installing hole 21 of described drilling tool 20; The tail end of described drill bit is provided with drill bit adapter sleeve 11, is provided with multiple fluting 12 vertically in the termination of described drill bit adapter sleeve, makes the termination of drill bit adapter sleeve form multiple expansion pawl 13; Be provided with the expansion pressure head 22 stretching into drill bit installing hole in the bottom of the drill bit installing hole of described drilling tool, the front end of described expansion pressure head is provided with cone 22a; The end section that drill bit installing hole corresponds to expansion pressure head is provided with extending bore 23, the diameter of described extending bore is greater than the diameter of drill bit adapter sleeve, the internal diameter D of the leading portion 24 of drill bit installing hole and the outside diameter d of drill bit adapter sleeve are slidably matched, and the internal diameter of the leading portion of drill bit installing hole is provided with expansion retaining groove 25; When drill bit adapter sleeve inserts drill bit installing hole, the expansion pawl of the cone top pressure drill bit adapter sleeve tail end of described expansion pressure head, makes expansion pawl expand outwardly and produce plastic deformation.
The diameter D2 of the extending bore of described drilling tool is greater than the external diameter at least 2mm of drill bit adapter sleeve.
Fit clearance between the internal diameter D of the leading portion of described drill bit installing hole and the outside diameter d of drill bit adapter sleeve is not more than 0.2mm.
The expansion retaining groove of the described drilling tool notch 26 inside installing hole is not less than the diameter of drill bit installing hole apart from the distance L1 of the entrance of installing hole.
The material of the drill bit adapter sleeve of the tail end of described drill bit is engineering plastics, and the wall thickness of the drill bit adapter sleeve of the tail end of drill bit is 1.0mm ~ 1.5mm, and the outside diameter d 1 of the expansion pressure head of described drilling tool is greater than the internal diameter D1 at least 0.6mm of drill bit adapter sleeve.
Embodiment one:
As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, a kind of tail end expands disposable drill bit and drilling tool, and described drill bit is the medical skull drill bit 10 driven by drilling tool, for operation of opening cranium, single use.The tail end of drill bit is arranged in the drill bit installing hole 21 of described drilling tool 20.
The tail end of described drill bit is provided with drill bit adapter sleeve 11, the outside diameter d=7.5mm of drill bit adapter sleeve, the internal diameter D1=5.0mm of drill bit adapter sleeve, and the wall thickness of drill bit adapter sleeve is 1.25mm; Be provided with eight flutings, 12, eight described flutings vertically to distribute along the circumference equal dividing of drill bit adapter sleeve in the termination of described drill bit adapter sleeve, make the termination of drill bit adapter sleeve form eight expansion pawls 13; The material of the drill bit adapter sleeve of the tail end of drill bit is engineering plastics.
Be provided with the expansion pressure head 22 stretching into drill bit installing hole in the bottom of the drill bit installing hole of described drilling tool, the outside diameter d 1=5.6mm of described expansion pressure head, be greater than the internal diameter 0.6mm of drill bit adapter sleeve.The front end of described expansion pressure head is provided with cone 22a, and the tapering of described cone is 60 °, and the diameter of cone front end is less than the internal diameter of drill bit adapter sleeve, and expansion pressure head can be inserted in the internal diameter of drill bit adapter sleeve.
The end section that drill bit installing hole corresponds to expansion pressure head is provided with extending bore 23, the diameter D2=9.5mm of described extending bore, is greater than the external diameter 2mm of drill bit adapter sleeve.
The internal diameter D=7.4mm of the leading portion 24 of drill bit installing hole, is slidably matched with the outside diameter d of drill bit adapter sleeve, and fit clearance is 0.1mm.
The internal diameter of the leading portion of drill bit installing hole is provided with expansion retaining groove 25; The notch 26 of expansion retaining groove inside installing hole, apart from the distance L1=8mm of the entrance of drill bit installing hole, is greater than the diameter of drill bit installing hole.
In use, the drill bit adapter sleeve of drill bit tail end inserts drill bit installing hole to drill bit, and expansion pressure head inserts in the internal diameter of drill bit adapter sleeve, and the expansion pawl of the cone top pressure drill bit adapter sleeve tail end of expansion pressure head front end, makes expansion pawl expand outwardly.Because the material (i.e. the material of drill bit adapter sleeve) of expansion pawl is engineering plastics, there is certain deformation behavior, can plastic deformation be produced after the scope towards elastic deformation excessively, and can not rupture.Under the effect of expansion pressure head, the limit deforming more than elastic deformation of the root of expansion pawl produces plastic deformation.
After drill bit uses and terminates, outwards extract drill bit from drilling tool, the expansion pawl of drill bit tail end inwardly shrinks under the squeezing action of the drill bit installing hole of drilling tool, and drill bit can be extracted smoothly.Its expansion pawl of drill bit after extracting has produced the expansion of plastic deformation, and as shown in Figure 5, the outer end of expansion pawl has been greater than the drill bit installing hole of drilling tool, can not reload in drilling tool.
The entrance of the notch of expansion retaining groove inside installing hole and installing hole should maintain a certain distance, and the expansion pawl after expansion can not be inserted in drilling tool by after manual compression easily.If compression-expansion pawl artificially, make expansion pawl enter drill bit installing hole from the entrance of drill bit installing hole, expansion pawl also can be stuck in notch 26 place of expansion retaining groove inside installing hole, drill bit cannot normal mounting on drilling tool.
This utility model in the design, the internal diameter D of the leading portion of drill bit installing hole and the outside diameter d of drill bit adapter sleeve keep the suitable gap that is slidably matched, make the drill bit adapter sleeve with expansion pawl can insert drill bit installing hole smoothly, and the plastic deformation that expansion pawl is produced is enough to stop drill bit to be reinserted in drilling tool.
This utility model in the design, the external diameter of expansion pressure head and the internal diameter of drill bit adapter sleeve keep suitable interference, make drill bit under suitable installation active force, the expansion pawl of drill bit can produce enough plastic deformations, and can extract from drilling tool easily after use terminates.
Claims (5)
1. tail end expands disposable drill bit and a drilling tool, and described drill bit is the disposable medical drill bit driven by drilling tool, and the tail end of drill bit is arranged in the drill bit installing hole of described drilling tool; It is characterized in that, the tail end of described drill bit is provided with drill bit adapter sleeve, is provided with multiple fluting vertically in the termination of described drill bit adapter sleeve, makes the termination of drill bit form multiple expansion pawl; Be provided with the expansion pressure head stretching into drill bit installing hole in the bottom of the drill bit installing hole of described drilling tool, the front end of described expansion pressure head is provided with cone; The end section that drill bit installing hole corresponds to expansion pressure head is provided with extending bore, the diameter of described extending bore is greater than the diameter of drill bit adapter sleeve, the internal diameter of the leading portion of drill bit installing hole and the external diameter of drill bit adapter sleeve are slidably matched, and the internal diameter of the leading portion of drill bit installing hole is provided with expansion retaining groove; When drill bit adapter sleeve inserts drill bit installing hole, the expansion pawl of the cone top pressure drill bit adapter sleeve tail end of described expansion pressure head, makes expansion pawl expand outwardly and produce plastic deformation.
2. a kind of tail end according to claim 1 expands disposable drill bit and drilling tool, and it is characterized in that, the diameter of the extending bore of described drilling tool is greater than the external diameter at least 2mm of drill bit adapter sleeve.
3. a kind of tail end according to claim 1 expands disposable drill bit and drilling tool, and it is characterized in that, the fit clearance between the internal diameter of the leading portion of described drill bit installing hole and the external diameter of drill bit adapter sleeve is not more than 0.2mm.
4. a kind of tail end according to claim 1 expands disposable drill bit and drilling tool, it is characterized in that, the expansion retaining groove of the described drilling tool notch inside installing hole is not less than the diameter of drill bit installing hole apart from the distance of the entrance of installing hole.
5. a kind of tail end according to claim 1 expands disposable drill bit and drilling tool, it is characterized in that, the material of the drill bit adapter sleeve of the tail end of described drill bit is engineering plastics, the wall thickness of the drill bit adapter sleeve of the tail end of drill bit is 1.0mm ~ 1.5mm, and the external diameter of the expansion pressure head of described drilling tool is greater than the internal diameter at least 0.6mm of drill bit adapter sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520329546.1U CN204744306U (en) | 2015-05-21 | 2015-05-21 | Tail end disposable drill bit of inflation and drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520329546.1U CN204744306U (en) | 2015-05-21 | 2015-05-21 | Tail end disposable drill bit of inflation and drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204744306U true CN204744306U (en) | 2015-11-11 |
Family
ID=54459071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520329546.1U Expired - Fee Related CN204744306U (en) | 2015-05-21 | 2015-05-21 | Tail end disposable drill bit of inflation and drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204744306U (en) |
-
2015
- 2015-05-21 CN CN201520329546.1U patent/CN204744306U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20190521 |