CN105387047A - Self-tapping screw for plastic part - Google Patents
Self-tapping screw for plastic part Download PDFInfo
- Publication number
- CN105387047A CN105387047A CN201510917648.XA CN201510917648A CN105387047A CN 105387047 A CN105387047 A CN 105387047A CN 201510917648 A CN201510917648 A CN 201510917648A CN 105387047 A CN105387047 A CN 105387047A
- Authority
- CN
- China
- Prior art keywords
- screw
- screw rod
- nut
- plastics
- tapping screw
- 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.)
- Pending
Links
- 229920003023 plastic Polymers 0.000 title claims abstract description 84
- 239000004033 plastic Substances 0.000 title claims abstract description 84
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 65
- 230000007704 transition Effects 0.000 claims abstract description 5
- 238000012856 packing Methods 0.000 claims description 7
- 241000755266 Kathetostoma giganteum Species 0.000 abstract 2
- 238000009434 installation Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0005—Screws that cut thread in the body into which they are screwed, e.g. wood screws of the helical wire type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses a self-tapping screw for a plastic part and belongs to the field of self-tapping screws. The self-tapping screw comprises a nut and a screw rod and further comprises a washer. The nut is arranged at one end of the screw rod, and the other end of the screw rod is a flat-head end face; a transition arc is disposed in the combining position of the flat-head end face and the side surface of the screw rod; the screw rod is provided with a screw thread which is arranged in the whole length direction of the screw rod; the washer is fixedly connected with the screw rod; one end face of the washer abuts against the nut; the nut is a hexagonal pan head nut; a cross-shaped countersunk head groove is formed in the center of the upper end face of the nut. By means of the technical scheme, the mounting performance is high when the self-tapping screw fastens the plastic part, damage to the plastic part is avoided at the same time, and the self-tapping screw is reasonable in structural design, simple in principle and low in cost.
Description
Technical field
The present invention relates to a kind of tapping screw field, more particularly, relate to a kind of tapping screw for working of plastics.
Background technique
Along with the development in epoch, automotive light weight technology " mutually " plastic automotive industrial expansion is inseparable with the development of plastics industry.Automotive light weight technology becomes the effective measures reducing motor vehicle emission, raising combustion efficiency in recent years, and be also the Main way of automotive material development, it makes plastics consumption in the car rise rapidly.
At present the quantity of plastics of many cars is more than 120 kilogram/in the world, and indivedual vehicle is taller, and the plastics use amount of Germany's benz limousine has reached 150 kilograms/.The quantity of plastics of more domestic cars has also reached 90 kilograms/.Can predict, along with the acceleration of automotive light weight technology process, plastics application in the car will be more extensive.Automotive light weight technology makes plastics be widely adopted in auto parts and components field as raw material, and from built-in fitting to exterior component and structural member, the figure of plastic part is seen everywhere.At present, developed country by automotive plastic amount number, as the material that the important symbol weighing Automobile Design and manufacture level uses from Hyundai Motor, no matter be external ornament, in-built gadget, or function and structural member, can see the figure of plastic part everywhere.
Naturally can use tapping screw when connection plastic materials and parts at present, but just there will be the phenomenon of stripped thread when working of plastics installed by screw at present, cause in assembly process and produce a large amount of scrap, especially more easily there is the phenomenon of stripped thread in some soft plastics.Following defect is there is during the fastening working of plastics of tapping screw: 1, the plastics of tapping screw mounting portion are when mounted easy to destroy, and affect its installation quality in current daily production; 2, tapping screw easily comes off when mounted, makes the fastening poor performance of tapping screw and working of plastics; 3, in tapping screw industry assembling, mostly use pneumatic or electric tool to install, plastic mounting part easily washes out by the very fast and screw head of installation rotating speed now, affects the integrity of parts of plastics.
Through retrieval, Chinese Patent Application No.: 2012206843924, the applying date: on December 12nd, 2012, invention and created name is: plastic fastening structure, this application case discloses a kind of combined type plastic fastening structure, plastic has tapping screw hole seat, there is nut positioning hole seat outer end, tapping screw hole, and nut positioning hole outer end is circular counter bore.Do not need embedding nut in plastic, plastic cost is low, injection moulding efficiency is high.First adopt tapping screw to assemble during assembling, tapping screw shoots tapping screw hole seat, and packaging efficiency is high, assembly cost is low.When tapping screw assembling occurs abnormal, during as there is screw hole seat scraping or explosion, plain screw nut can also be adopted again to assemble, when adopting plain screw nut, plain screw can pass tapping screw hole seat, nut can put into nut positioning hole, nut positioning hole can limit nut rotation, nut spanner is not needed during assembling, therefore packaging efficiency is high, as nut scraping, nut can be changed easily, ensure that plastic is reliably fastening, the circular counter bore of nut positioning hole outer end can improve plastic image appearance, but this plastic fastening structure easily comes off when installing, make the fastening poor performance of tapping screw and working of plastics, even if the later stage can use with the assembling of plain screw nut, but also can affect the utilization efficiency of fastening piece.
Summary of the invention
the technical problem that invention will solve
Tightness poor, the deficiency that affects working of plastics locally completeness etc. when the object of the invention is to overcome the fastening working of plastics of tapping screw in prior art, provide a kind of tapping screw for working of plastics, when adopting the technical program to make tapping screw fastening working of plastics, installation capability is high, working of plastics can not be destroyed simultaneously, and reasonable in design, principle is simple, and cost is low.
technological scheme
For achieving the above object, technological scheme provided by the invention is:
A kind of tapping screw for working of plastics of the present invention, comprise nut, screw rod, it also comprises packing ring, described screw rod one end is provided with nut, the other end is tack end face, described tack end face and the junction of screw rod side are provided with transition arc, described screw rod) be provided with screw thread, and screw thread) arrange along the whole length direction of screw rod; Described packing ring and screw rod are connected, and one end is against on nut, and described nut is hexagonal coiled hair nut, and the center of its upper-end surface is provided with cross countersunk head groove.
As further improvement of the present invention, described screw rod is also provided with helical groove, described helical groove is arranged along the side spiral of screw rod, and described helical groove is arranged between each pitch of screw thread.
As further improvement of the present invention, described helical groove is the arc groove gradually narrow to screw rod medial axis from screw rod side.
As further improvement of the present invention, the degree of depth of described helical groove is 0.45 ~ 0.5mm.
As further improvement of the present invention, the cross section of described screw thread is triangle.
As further improvement of the present invention, the pitch of described screw thread is 2.4 ~ 2.5mm, and the thread degree of depth of described screw thread is 0.45 ~ 0.5mm.
beneficial effect
Adopt technological scheme provided by the invention, compared with prior art, there is following beneficial effect:
(1) a kind of tapping screw for working of plastics of the present invention, when the helical groove arranged between each pitch of tapping screw screw thread makes tapping screw at fastening plastics, give plastics more storage space, while namely making to be full of plastics between each pitch of screw thread, plastics are also filled in helical groove, strengthen the area of contact of working of plastics and screw rod, thus increase the rotation torque of tapping screw and the de-pulling force between working of plastics and tapping screw, ultimately increase the installation quality between tapping screw and working of plastics.
(2) a kind of tapping screw for working of plastics of the present invention, tapping screw screw thread make the least possible destroyed of the plastics of mounting portion compared with large screw pitch, increase the area of contact of working of plastics and tapping screw simultaneously, thus reduce the possibility of tapping screw stripped thread, and the darker thread of screw thread make that darker thread can be deep snap in plastics, thus increasing pulling-out force between tapping screw and working of plastics, screw thread improves the installation effect between tapping screw and working of plastics more effectively compared with the dual combination of large screw pitch and darker thread.
(3) a kind of tapping screw for working of plastics of the present invention, the screw rod the other end is tack end face, when making to adopt pneumatic or electric tool installation tapping screw in industry assembling, not easily comparatively fast plastic mounting part is washed out owing to installing rotating speed, namely tack end face can reduce the impact force to parts of plastics, ensure the integrity of parts of plastics, thus strengthen rotation torque, improve the efficiency of assembling of tapping screw.
(4) a kind of tapping screw for working of plastics of the present invention, reasonable in design, principle is simple, is convenient to promote the use of.
Accompanying drawing explanation
Fig. 1 is the plan view of a kind of tapping screw for working of plastics of the present invention;
Fig. 2 is the left view of a kind of tapping screw for working of plastics of the present invention;
Fig. 3 is the sectional view along A-A in Fig. 1;
Fig. 4 is the partial enlarged drawing in Fig. 3.
Label declaration in schematic diagram:
1, nut; 2, packing ring; 3, screw rod; 31, helical groove; 32, screw thread; 33, transition arc.
Embodiment
For understanding content of the present invention further, by reference to the accompanying drawings and embodiment the present invention is described in detail.
embodiment 1
Composition graphs 1, Fig. 2, Fig. 3 and Fig. 4, a kind of tapping screw for working of plastics of the present embodiment, comprise nut 1, screw rod 3, it also comprises packing ring 2, screw rod 3 one end is provided with nut 1, and the other end is tack end face, and the junction of tack end face and screw rod 3 side is provided with transition arc 33, screw rod 3 is provided with screw thread 32, and screw thread 32 is along the whole length direction setting of screw rod 3; Packing ring 2 and screw rod 3 are connected, and one end is against on nut 1, and nut 1 is hexagonal coiled hair nut, and the center of its upper-end surface is provided with cross countersunk head groove.In the present embodiment, screw rod 3 the other end is tack end face, when making to adopt pneumatic or electric tool installation tapping screw in industry assembling, not easily comparatively fast plastic mounting part is washed out owing to installing rotating speed, namely tack end face can reduce the impact force to parts of plastics, ensure the integrity of parts of plastics, thus increasing rotation torque, improve the efficiency of assembling of tapping screw.
Screw rod 3 is also provided with helical groove 31, and helical groove 31 is arranged along the side spiral of screw rod 3, and helical groove 31 is arranged between each pitch of screw thread 32.
Helical groove 31 is the arc groove gradually narrow to screw rod 3 medial axis from screw rod 3 side, the degree of depth of helical groove 31 is 0.45mm, as in Fig. 4 being the sectional drawing along tapping screw medial axis, helical groove 31 is arranged between each pitch of screw thread 32 as can be seen from Figure 4, the cross section of helical groove 31 is V-arrangement, namely along with the degree of depth of helical groove 31 increases, the V-arrangement opening of its bi-side composition reduces gradually.
When the helical groove 31 arranged between each pitch of screw thread 32 in the present embodiment makes tapping screw at fastening plastics, give plastics more storage space, make filling plastic in helical groove 31 while namely making to be full of plastics between each pitch of screw thread 32, strengthen the area of contact of working of plastics and screw rod 3, thus increase the rotation torque of tapping screw and the de-pulling force between working of plastics and tapping screw, ultimately increase the installation quality between tapping screw and working of plastics.The cross section of screw thread 32 is the pitch of V thread screw 32 is 2.4mm, the thread degree of depth of screw thread 32 is 0.45mm, the thread degree of depth is the height that the thread of screw thread 32 protrudes from screw rod 3 side herein, in this example, the pitch of the screw thread 32 of tapping screw is 2.4mm, larger pitch makes the least possible being destroyed of the plastics of mounting portion, increase the area of contact of working of plastics and tapping screw simultaneously, thus reduce the possibility of tapping screw stripped thread, and the thread degree of depth of screw thread 32 is 0.45mm, what darker thread made that darker thread can be deep snaps in plastics, thus increase pulling-out force between tapping screw and working of plastics, screw thread 32 improves the installation effect between tapping screw and working of plastics more effectively compared with the dual combination of large screw pitch and darker thread.
embodiment 2
A kind of tapping screw for working of plastics of the present embodiment, its basic structure is with embodiment 1, and difference is: the pitch of the screw thread 32 in the present embodiment is 2.4mm, and the thread degree of depth of screw thread 32 is 0.5mm.
Schematically above be described the present invention and mode of execution thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the mode of structure similar to this technological scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (6)
1. the tapping screw for working of plastics, comprise nut (1), screw rod (3), it is characterized in that, it also comprises packing ring (2), described screw rod (3) one end is provided with nut (1), and the other end is tack end face, and the junction of described tack end face and screw rod (3) side is provided with transition arc (33), described screw rod (3) is provided with screw thread (32), and screw thread (32) is along the whole length direction setting of screw rod (3); Described packing ring (2) and screw rod (3) are connected, and one end is against on nut (1), and described nut (1) is hexagonal coiled hair nut, and the center of its upper-end surface is provided with cross countersunk head groove.
2. a kind of tapping screw for working of plastics according to claim 1, it is characterized in that: described screw rod (3) is also provided with helical groove (31), described helical groove (31) is arranged along the side spiral of screw rod (3), and described helical groove (31) is arranged between each pitch of screw thread (32).
3. a kind of tapping screw for working of plastics according to claim 1 and 2, is characterized in that: described helical groove (31) is the arc groove gradually narrow to screw rod (3) medial axis from screw rod (3) side.
4. a kind of tapping screw for working of plastics according to claim 2, is characterized in that: the degree of depth of described helical groove (31) is 0.45 ~ 0.5mm.
5. a kind of tapping screw for working of plastics according to claim 1, is characterized in that: the cross section of described screw thread (32) is triangle.
6. a kind of tapping screw for working of plastics according to claim 5, is characterized in that: the pitch of described screw thread (32) is 2.4 ~ 2.5mm, and the thread degree of depth of described screw thread (32) is 0.45 ~ 0.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510917648.XA CN105387047A (en) | 2015-12-14 | 2015-12-14 | Self-tapping screw for plastic part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510917648.XA CN105387047A (en) | 2015-12-14 | 2015-12-14 | Self-tapping screw for plastic part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105387047A true CN105387047A (en) | 2016-03-09 |
Family
ID=55419670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510917648.XA Pending CN105387047A (en) | 2015-12-14 | 2015-12-14 | Self-tapping screw for plastic part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105387047A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107652543A (en) * | 2017-10-17 | 2018-02-02 | 苏州华丰不锈钢紧固件有限公司 | A kind of high-strength insulating plastic cement screw |
| CN108644204A (en) * | 2018-05-31 | 2018-10-12 | 宜兴市怡光环保机械有限公司 | One kind is anti-to break through anti-loosening container floor nail and preparation method thereof |
| CN109681508A (en) * | 2019-02-28 | 2019-04-26 | 北京富华鑫标准件有限公司 | A kind of split type screw |
| CN112413388A (en) * | 2019-08-20 | 2021-02-26 | 刘大银 | Composite screw |
| JP2022502609A (en) * | 2018-09-20 | 2022-01-11 | シンプソン ストロング タイ カンパニー インコーポレーテッド | Fastener with continuous detent area |
| US11739783B2 (en) | 2021-04-30 | 2023-08-29 | Simpson Strong-Tie Company Inc. | Concrete fastener |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5957646A (en) * | 1998-11-02 | 1999-09-28 | Anthony C. Giannuzzi | Enhanced strength screw-type masonry anchor |
| US20110206938A1 (en) * | 2007-02-28 | 2011-08-25 | Olaf Ambros | Screw comprising a thread-forming thread, blank for the production of said screw, and screw connection |
| CN204253541U (en) * | 2014-11-26 | 2015-04-08 | 温州科腾紧固件有限公司 | A kind of tapping screw assembly |
-
2015
- 2015-12-14 CN CN201510917648.XA patent/CN105387047A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5957646A (en) * | 1998-11-02 | 1999-09-28 | Anthony C. Giannuzzi | Enhanced strength screw-type masonry anchor |
| US20110206938A1 (en) * | 2007-02-28 | 2011-08-25 | Olaf Ambros | Screw comprising a thread-forming thread, blank for the production of said screw, and screw connection |
| CN204253541U (en) * | 2014-11-26 | 2015-04-08 | 温州科腾紧固件有限公司 | A kind of tapping screw assembly |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107652543A (en) * | 2017-10-17 | 2018-02-02 | 苏州华丰不锈钢紧固件有限公司 | A kind of high-strength insulating plastic cement screw |
| CN108644204A (en) * | 2018-05-31 | 2018-10-12 | 宜兴市怡光环保机械有限公司 | One kind is anti-to break through anti-loosening container floor nail and preparation method thereof |
| JP2022502609A (en) * | 2018-09-20 | 2022-01-11 | シンプソン ストロング タイ カンパニー インコーポレーテッド | Fastener with continuous detent area |
| JP7385656B2 (en) | 2018-09-20 | 2023-11-22 | シンプソン ストロング タイ カンパニー インコーポレーテッド | Fasteners with continuous detent areas |
| CN109681508A (en) * | 2019-02-28 | 2019-04-26 | 北京富华鑫标准件有限公司 | A kind of split type screw |
| CN112413388A (en) * | 2019-08-20 | 2021-02-26 | 刘大银 | Composite screw |
| US11739783B2 (en) | 2021-04-30 | 2023-08-29 | Simpson Strong-Tie Company Inc. | Concrete fastener |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160309 |
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| RJ01 | Rejection of invention patent application after publication |