CN204312498U - A kind of improvement self-tapping screw structure - Google Patents
A kind of improvement self-tapping screw structure Download PDFInfo
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- CN204312498U CN204312498U CN201420694175.2U CN201420694175U CN204312498U CN 204312498 U CN204312498 U CN 204312498U CN 201420694175 U CN201420694175 U CN 201420694175U CN 204312498 U CN204312498 U CN 204312498U
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- rod
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- fraising
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Abstract
The utility model discloses a kind of improvement self-tapping screw structure, comprise: a body of rod, the rear end of the described body of rod is provided with the termination that a diameter is greater than the described body of rod, the front end of the described body of rod from described end toward the described body of rod is provided with threaded section successively, fraising section and screw-in section, described threaded section is spirally extended to the fraising section of the described body of rod by adjacent described end, described fraising section is provided with the cutting blade by the radial projection of the body of rod, the diameter of described fraising section is greater than the diameter of described threaded section and described screw-in section, described screw-in section is provided with the spiral cutting edge being extended to described lever front end by fraising section, groove is provided with between described spiral cutting edge, the front end of the described body of rod is provided with the drill bit of taper, described drill bit is provided with drill lip, and described drill lip is connected mutually with described spiral cutting edge, the diameter of described screw-in section is between the diameter at tooth peak and the diameter of root of the tooth of the thread of described threaded section.Improvement self-tapping screw structure of the present utility model by sealed for two kinds of different hardness direct intimate, when effectively preventing interlocking, can deform, ruptures.
Description
Technical field
The utility model relates to screw part technical field, refers to a kind of improvement self-tapping screw structure especially.
Background technique
Existing self tapping screw is when fastening object, shoot in object by its front end screw terminal, by thread, object cutting is squeezed out the screw thread matched again, and lock in object, but due to its thread of self tapping screw do not have discharge cut object and the function of chip that produces, so that the chip produced in screw-in process cannot be discharged outside object smoothly, and remain in object inside, and hinder self tapping screw to screw in, so when self tapping screw fastening object, higher torsion must be applied, could self tapping screw be locked in object, and in real life, the bar portion that self tapping screw usually occurs rotates because bearing higher torsion, and the situation having bending deflection even to rupture.In addition, when carrying out the object as H profile steel or the unlike material such as C-type steel and plank hardness and being fastening, because its hardness of the steel such as H profile steel or C-type steel is higher, therefore, the speed of self tapping screw when locking steel is slower, and due to its hardness of plank lower, therefore self tapping screw is when locking plank, speed is relatively very fast, and do not lock completely in the part that self tapping screw is positioned at steel, separately being positioned under plank part is but spirally connected completely and locks plank situation, between steel and plank, just can produce gap, and cause between steel and plank and be difficult to the sealed trouble of close and firm.
Model utility content
The technical problems to be solved in the utility model is to provide a kind of improvement self-tapping screw structure, to solve the problems of the technologies described above.
For solving the problems of the technologies described above, embodiment of the present utility model provides a kind of improvement self-tapping screw structure, comprise: a body of rod, the rear end of the described body of rod is provided with the termination that a diameter is greater than the described body of rod, the front end of the described body of rod from described end toward the described body of rod is provided with threaded section successively, fraising section and screw-in section, described threaded section is spirally extended to the fraising section of the described body of rod by adjacent described end, described fraising section is provided with the cutting blade by the radial projection of the body of rod, the diameter of described fraising section is greater than the diameter of described threaded section and described screw-in section, described screw-in section is provided with the spiral cutting edge being extended to described lever front end by fraising section, groove is provided with between described spiral cutting edge, the front end of the described body of rod is provided with the drill bit of taper, described drill bit is provided with drill lip, and described drill lip is connected mutually with described spiral cutting edge, the diameter of described screw-in section is between the diameter at tooth peak and the diameter of root of the tooth of the thread of described threaded section.
The diameter of described screw-in section is two point one that the diameter at described tooth peak is added with the diameter of described root of the tooth.
The cutting blade of described fraising section at least comprises two, and described at least two cutting blades are symmetrical set.
The edge of spiral cutting edge described in described screw-in section forms blade, and described blade is a raised long and narrow inclined-plane.
The beneficial effect of technique scheme of the present utility model is as follows:
Improvement self-tapping screw structure of the present utility model by sealed for two kinds of different hardness direct intimate, when effectively preventing interlocking, can deform, ruptures.
Accompanying drawing explanation
Fig. 1 is the perspective view of the utility model embodiment.
Fig. 2 is the application schematic diagram one of the utility model embodiment.
Fig. 3 is the application schematic diagram two of the utility model embodiment.
Fig. 4 is the application schematic diagram three of the utility model embodiment.
Embodiment
For making the technical problems to be solved in the utility model, technological scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, the utility model embodiment provides a kind of improvement self-tapping screw structure, comprise a body of rod 1, the rear end of the body of rod 1 is provided with the termination 2 that a diameter is greater than the body of rod 1, the body of rod 1 is provided with threaded section 3 successively from termination 2 place toward the front end of the body of rod 1, fraising section 4 and screw-in section 5, threaded section 3 is spirally extended to fraising section 4 place of the body of rod 1 by adjacent termination 2, fraising section 4 is provided with by the cutting blade 41 of the radial projection of the body of rod 1, the diameter of fraising section 4 is greater than threaded section 3 and screws in the diameter of section 5, screw in section 5 and be provided with the spiral cutting edge 51 being extended to the body of rod 1 front end by fraising section 4, groove 52 is provided with between spiral cutting edge 51, the front end of the body of rod 1 is provided with the drill bit 53 of taper, drill bit 53 is provided with drill lip, and drill lip is connected mutually with spiral cutting edge 51, screw in the diameter of section 5 between the diameter at the tooth peak 32 of the thread 31 of threaded section 3 and the diameter of root of the tooth 33.
Screwing in the diameter of section 5 is two point one that the diameter at tooth peak 32 is added with the diameter of root of the tooth 33.
The cutting blade 41 of fraising section 4 at least comprises two, and at least two cutting blades 41 are symmetrical set.
The edge screwing in spiral cutting edge 51 in section 5 forms blade 511, and blade 511 is in a raised long and narrow inclined-plane.
As shown in Fig. 2 to Fig. 4, when the sheet materials such as plank 6 and the steel such as H profile steel or C-type steel 7 are locked, the drill bit 53 screwing in section 5 is butted on the surface of sheet material 6, then termination 2 place of electric tool to screw is utilized to impose torsion, rotate to drive screw, when screw rotates, set by the drill bit 53 of its screw-in section 5, drill lip just can pierce sheet material 6, simultaneously the spiral cutting edge 51 that is connected mutually of drill lip is also with piercing in sheet material 6, and by spiral cutting edge 51 edge blade 511 be a raised long and narrow inclined design, when spiral cutting edge 51 can be made to cut sheet material 6, its blade 511 is only had to touch sheet material 6, and and between sheet material 6, form linear contact lay, so, surface friction drag when spiral cutting edge 51 cuts sheet material 6 can be reduced, when piercing sheet material 6 to make screw-in section 5, more quick, smooth and easy, and when spiral cutting edge 51 pierces in sheet material 6, sheet material 6 is cut produced chip, just can guide along the groove 52 between spiral cutting edge 51 and discharge outside sheet material 6 smoothly, to avoid hindering locking of ensuing fraising section 4 and threaded section.
And after sheet material 6 is got out hole 61 by screw-in section 5, screw in the cutting blade 41 of the fraising section 4 after section 5, just the hole 1 of sheet material 6 can be expanded further again, make the threaded section 3 after being located at fraising section 4, can not contact with the hole wall of the hole 61 of sheet material 6, and the action of tapping is produced to the hole 61 of sheet material 6.Then, after the drill-through sheet material 6 of screw-in section 5, continue to hole to the steel 7 adjacent with sheet material 6, and the blade 511 pairs of steel 7 screwing in drill lip and spiral cutting edge 51 set by section 5 its drill bit 53 carry out hole 2 71 be drilled with time, its groove 52 is also guided chip simultaneously and is discharged in outward, in order to locking of threaded section 3.
And when ream section 4 continue screw in section 4 enter by screw in section 4 get out steel 7 hole 2 71 time, because the structural strength of cutting blade 41 is weaker, so when entering hole 2 71 of steel 7, the steel 7 that just can be contacted fractureed, therefore expansion action can not be produced to the hole 2 71 of steel 7, and make threaded section 3 can carry out tapping to the hole 2 71 of steel 7.Diameter again owing to screwing in section 5 is less than tooth peak 32 diameter of the thread 31 of threaded section 3, so the aperture screwing in the hole 2 71 that section 5 gets out also is less than the diameter at the tooth peak 32 of the thread 31 of threaded section 3, the thread 31 continuing the threaded section 3 locked just can cut and can supply the internal thread 72 that be engaged corresponding to it in the hole wall of the hole 2 71 of steel 7, can lock with threaded section 3 phase to make steel 7, and along with continuing to lock, namely the termination 2 of screw rear end can press on sheet material 6 surface, to reach sheet material 6 and the sealed effect of steel 7 close and firm.
It is more than preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. an improvement self-tapping screw structure, it is characterized in that: comprising: a body of rod, the rear end of the described body of rod is provided with the termination that a diameter is greater than the described body of rod, the front end of the described body of rod from described end toward the described body of rod is provided with threaded section successively, fraising section and screw-in section, described threaded section is spirally extended to the fraising section of the described body of rod by adjacent described end, described fraising section is provided with the cutting blade by the radial projection of the body of rod, the diameter of described fraising section is greater than the diameter of described threaded section and described screw-in section, described screw-in section is provided with the spiral cutting edge being extended to described lever front end by fraising section, groove is provided with between described spiral cutting edge, the front end of the described body of rod is provided with the drill bit of taper, described drill bit is provided with drill lip, and described drill lip is connected mutually with described spiral cutting edge, the diameter of described screw-in section is between the diameter at tooth peak and the diameter of root of the tooth of the thread of described threaded section.
2. improve self-tapping screw structure according to claim 1, it is characterized in that: the diameter of described screw-in section is two point one that the diameter at described tooth peak is added with the diameter of described root of the tooth.
3. improve self-tapping screw structure according to claim 1, it is characterized in that: the cutting blade of described fraising section at least comprises two, and described at least two cutting blades are symmetrical set.
4. improve self-tapping screw structure according to claim 1, it is characterized in that: the edge of spiral cutting edge described in described screw-in section forms blade, and described blade is a raised long and narrow inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420694175.2U CN204312498U (en) | 2014-11-18 | 2014-11-18 | A kind of improvement self-tapping screw structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420694175.2U CN204312498U (en) | 2014-11-18 | 2014-11-18 | A kind of improvement self-tapping screw structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204312498U true CN204312498U (en) | 2015-05-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420694175.2U Expired - Fee Related CN204312498U (en) | 2014-11-18 | 2014-11-18 | A kind of improvement self-tapping screw structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204312498U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016201501A1 (en) * | 2015-06-16 | 2016-12-22 | United Jc Pty Ltd | Improved screw |
| CN110332196A (en) * | 2019-07-23 | 2019-10-15 | 湖南省合和顺信息技术咨询有限公司 | One kind is from the locking connection component of reaming waterproof |
| CN114098892A (en) * | 2021-12-09 | 2022-03-01 | 北京大学第三医院（北京大学第三临床医学院） | Integrated screw rod for drilling and nail placing, electric drill and method |
-
2014
- 2014-11-18 CN CN201420694175.2U patent/CN204312498U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016201501A1 (en) * | 2015-06-16 | 2016-12-22 | United Jc Pty Ltd | Improved screw |
| CN110332196A (en) * | 2019-07-23 | 2019-10-15 | 湖南省合和顺信息技术咨询有限公司 | One kind is from the locking connection component of reaming waterproof |
| CN114098892A (en) * | 2021-12-09 | 2022-03-01 | 北京大学第三医院（北京大学第三临床医学院） | Integrated screw rod for drilling and nail placing, electric drill and method |
| CN114098892B (en) * | 2021-12-09 | 2024-05-03 | 北京大学第三医院（北京大学第三临床医学院） | Integrated screw rod for drilling and nailing, electric drill and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Minggui Inventor before: Huang Hui |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160517 Address after: 528458 Guangdong city of Zhongshan Province three township gurabardha Mine Road No. 4 first floor Patentee after: Zhongshan City Tianyu Hardware Products Co., Ltd. Address before: Xiangshan County, Zhejiang Province town of Dan 315700 South Street, Ningbo City No. 11 Patentee before: Huang Hui |
|
| 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: 20150506 Termination date: 20171118 |