CN204041671U - Tapping screw - Google Patents
Tapping screw Download PDFInfo
- Publication number
- CN204041671U CN204041671U CN201420327465.3U CN201420327465U CN204041671U CN 204041671 U CN204041671 U CN 204041671U CN 201420327465 U CN201420327465 U CN 201420327465U CN 204041671 U CN204041671 U CN 204041671U
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- CN
- China
- Prior art keywords
- screw
- tooth
- screw rod
- tapping
- screw thread
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- 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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Abstract
Tapping screw, the tip of screw rod extends for reducing outer diameter, it is characterized in that the pitch of screw thread and middle screw rod diameter are than being 1:4.1-9; The tip of screw rod is round platform or coniform.The most advanced and sophisticated worm tooth longitudinal section of screw rod is bald tooth, and the worm tooth of middle screw rod is for cutting tooth.The utility model easily can be screwed into thickness and be connected at 4mm with lmm aluminium sheet, does not need first tapping, and this is that GB tapping screw tooth is apart from being difficult to.
Description
One, technical field
The utility model provides a kind of tapping screw that particularly can play the effect preventing from loosening for material work piece such as slim aluminum alloys well.
Two, background technique
The firm efficiency of installation that tapping screw is used for structural member is high, good fixing effect, as CN03152296.3 relates to a kind of tapping screw, it has columniform outer diameter at the screw thread of Background Region (towards head), extends to reduce outer diameter towards the termination of screw at the screw thread of front area (deviating from head).The engagement bisector of angle recorded in threaded top relative to core axioversion locate, and, to tilt towards screw head at the bisector of front area from Background Region (the first cross section) towards front area (the second cross section) oppositely; The reversal point of thread cross-section should be placed like this: the first cross section is presented on Background Region, and the second cross section is presented on front area.
CNY201180070895. a kind of tapping screw that particularly can play the effect preventing from loosening for soft material workpiece such as resin aluminum alloys is well related to.Tapping screw comprises axle portion and at the shaping regular screw threads tooth of its side face, in institute's regular screw threads tooth, cut its top form tool withdrawal groove, make coupling protrusion shaping in the bottom surface of described tool withdrawal groove along part or all of end of the side connecting described regular screw threads tooth.According to described tapping screw, the excess thickness portion of having imbedded the workpiece of tool withdrawal groove embeds in coupling protrusion, even if workpiece expands like this, shrink or vibrate and also can play the effect preventing from loosening well.
CNY201110153790 tapping screw, the steel plate layer poststack that 2 thickness can be reached 0.8 millimeter does not link with not producing chip, even and 1 thickness reaches the steel plate of 1.6 millimeters, link with also can not producing helical chip.The end that Thread Forming TF is at one end provided with the cylindrical portion of head has coniform portion, the worm tooth in the worm tooth being located at the parallel thread portion of cylindrical portion and the tapered thread portion being located at coniform portion is made up of the worm tooth that pitch is thicker, wherein, it is that the acute angle of about 30 degree is coniform that coniform portion is formed as tip angle, the 2nd worm tooth extended abreast with the worm tooth in tapered thread portion is provided with in the end portion in coniform portion, two worm tooths are formed in the end portion in coniform portion, the axial length of the head pointed cone screw section be made up of these two worm tooths is more than or equal to the thickness of linked sheet metal.
CN201010232897. a tapping screw, its with little screw moment accurately tapping internal thread time can obtain larger fastening force, comprising: screw rod, it is from screw head to downward-extension; The externally threaded multiple spiral shell tooth of constant altitude, each own identical spiral shell tooth height, is formed at the part place extended immediately below screw head of screw rod; And reducing highly externally threaded multiple spiral shell tooth, its spiral shell tooth height reduces gradually towards the end face of masthead end portion, and they are formed continuously at the masthead end portion of screw rod and constant altitude outside thread; And tiny arc face, each joint office that it is reducing highly externally threaded upper and lower root surface and side, upper and lower is formed continuously, tiny arc face is formed as at least extending along the bottom root surface of constant altitude male threaded end spiral shell tooth and the attachment portion of lower side, and constant altitude male threaded end spiral shell tooth is continuous with reduction height outside thread.
The termination (tip) of general tapping screw reduces outer diameter and extends, but in the processing of the slim materials such as aluminum alloy, the pitch of the tapping screw of prior art is 1:2.5-4 with screw diameter ratio; Bad in the effect of the aluminum alloy thin section bar of fastening about 1mm, comparatively speaking, tapping screw pitch is wide, and as adopted the tapping screw of minor diameter, tightening force is also inadequate.Above-mentioned prior art fails head it off.
Three, model utility content
The purpose of this utility model is, proposes a kind of comparatively large and have the tapping screw of the application in the processing of the sheet material of certain thickness aluminum alloy or other metal for area; The reduction of driving moment and the raising of binding strength can be realized simultaneously, the fastening workpiece from soft material to the various sheet materials compared with hard material can be applicable to.
The technical solution of the utility model is: a kind of tapping screw, and the tip of screw rod extends for reducing outer diameter, and the pitch of screw thread is 1:4.1-9 with middle screw rod diameter ratio; The tip of screw rod is round platform or coniform.
The pitch of screw thread is 1:4.2-6 with middle screw rod diameter than especially.
Further, the most advanced and sophisticated screw thread longitudinal section of screw rod is bald tooth, and the screw thread longitudinal section of middle screw rod is for cutting tooth (canine tooth).
The beneficial effects of the utility model: in the processing of the slim materials such as aluminum alloy, with the pitch of tapping screw of the present utility model and the goods of screw diameter ratio, at aluminum alloy thin section bar effective of fastening about 1mm, as adopted the tapping screw of two sections of difformity screw threads, then better effects if, although most advanced and sophisticated bald tooth is attacked and comparatively exerted oneself, diameter is less, and the cutting tooth of rear end is then easy to enter.Respond well when practical about 1mm sheet material section bar is fixed.
Aluminium alloy plate thickness 1.4mm with 4mm is connected, and the utility model screw adopts 4.8mm external diameter.Former technique will on 4mm aluminium sheet tapping tooth after first boring, then to connect with screw, consuming time like this, work consuming.As adopted the application's tapping screw, after boring, do not need tapping, because adopting head technique to be directly easily screwed into, while being screwed into can in hole automatic screw, add that screw thread adopts special closely-pitched duration skill more firm after being screwed into, not easily loosen.The utility model easily can be screwed into thickness and be connected at 4mm with lmm aluminium sheet, does not need first tapping, and this is that existing GB tapping screw tooth is apart from being difficult to.Former GB tapping screw, because aluminium sheet is thick, when being screwed into, resistance is too large, is not easily screwed into: the utility model screw feature: can also close and firm 2 blocks of about 1mm aluminium sheets, is not easy to loosen after fixing.
The angle of the utility model pitch is little (screw thread and horizontal oblique angle are less than 12 degree), is screwed into resistance little; And adopting the tapping screw of existing GB, the angle of pitch is large, and when being screwed into, horizontal oblique angle is greater than 12 degree, is screwed into resistance large.
Four, accompanying drawing explanation
Fig. 1 is prior art structural representation.
Fig. 2 is the utility model structural representation.
Five, embodiment
Comparatively speaking, existing tapping screw pitch is wide, and as adopted the tapping screw of minor diameter, tightening force is also inadequate.
A kind of tapping screw of the present utility model, the tip 2 of screw rod 1 extends for reducing outer diameter, and the pitch of screw thread is 1:5.5-9 with middle screw rod 3 diameter ratio; The tip of screw rod is round platform or coniform portion.The pitch of screw thread is 1:6-8 with middle screw rod diameter than especially.
The most advanced and sophisticated worm tooth cross section of screw rod is bald tooth 4, adopts 2-5 screw thread, and the worm tooth of middle screw rod, for cutting tooth 5, is 3-7 screw thread.The most advanced and sophisticated worm tooth cross section transition screw thread that to be bald tooth adopt the width of bald tooth to narrow gradually to the cutting tooth of middle screw rod, transition screw thread is 2-20, especially 2-8 (shown in also having in Fig. 2), because the longest tapping screw can reach 50mm, so longer screw can adopt the longer transition screw thread with more number screw thread.
The angle of the utility model pitch is little, and screw thread and horizontal oblique angle are less than 12 degree, are generally 9-12 degree.Screw thread and horizontal oblique angle are 10-11 degree.
The utility model embodiment non-limiting scope of the present utility model, anyly meet simple replacement of the present utility model or improve the scope of not walking out the protection of the utility model claim.
Claims (7)
1. a tapping screw, the tip of screw rod extends for reducing outer diameter, it is characterized in that the pitch of screw thread and middle screw rod diameter are than being 1:4.1-9; The tip of screw rod is round platform or coniform.
2. tapping screw according to claim 1, is characterized in that the pitch of screw thread and middle screw rod diameter are than being 1:4.2-6.
3. tapping screw according to claim 1, is characterized in that the longitudinal section of the most advanced and sophisticated screw thread of screw rod is bald tooth, and the screw thread longitudinal section of middle screw rod is for cutting tooth.
4. tapping screw according to claim 3, is characterized in that the transition screw thread that described bald tooth adopts the width of bald tooth to narrow gradually to the cutting tooth of middle screw rod, transition screw thread are 2-20.
5., according to the tapping screw one of claim 1-4 Suo Shu, it is characterized in that screw thread and horizontal oblique angle are 9-12 degree.
6., according to the tapping screw one of claim 1-4 Suo Shu, it is characterized in that screw thread and horizontal oblique angle are 10-11 degree.
7. tapping screw according to claim 4, is characterized in that the transition screw thread that described bald tooth adopts the width of bald tooth to narrow gradually to the cutting tooth of middle screw rod, transition screw thread are 2-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420327465.3U CN204041671U (en) | 2014-06-18 | 2014-06-18 | Tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420327465.3U CN204041671U (en) | 2014-06-18 | 2014-06-18 | Tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204041671U true CN204041671U (en) | 2014-12-24 |
Family
ID=52242340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420327465.3U Expired - Fee Related CN204041671U (en) | 2014-06-18 | 2014-06-18 | Tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204041671U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100623A (en) * | 2014-06-18 | 2014-10-15 | 无锡昱兴建筑五金有限公司 | Tapping screw |
-
2014
- 2014-06-18 CN CN201420327465.3U patent/CN204041671U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100623A (en) * | 2014-06-18 | 2014-10-15 | 无锡昱兴建筑五金有限公司 | Tapping screw |
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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: 20141224 Termination date: 20160618 |