CN203835917U - Triangular self-tapping locking screw - Google Patents
Triangular self-tapping locking screw Download PDFInfo
- Publication number
- CN203835917U CN203835917U CN201420257659.0U CN201420257659U CN203835917U CN 203835917 U CN203835917 U CN 203835917U CN 201420257659 U CN201420257659 U CN 201420257659U CN 203835917 U CN203835917 U CN 203835917U
- Authority
- CN
- China
- Prior art keywords
- mounting groove
- bolt
- head
- hexagonal
- tapping
- 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
Links
Abstract
The utility model relates to a triangular self-tapping locking screw. According to the technical scheme, the triangular self-tapping locking screw is mainly characterized by comprising a bolt head, a bolt rod and a flange disc, the bolt head is in a hexagonal flange head, a mounting groove is formed in the bolt head, and the interior and the exterior of the screw can be operated through a tool. The bolt rod is divided into an upper cylindrical portion and a lower cylindrical portion, the upper portion is connected with one end of the flange disc integrally, and the connecting position of the upper portion and the flange disc is in a cone-frustum-shaped structure. The lower portion of the bolt rod is provided with connecting threads, the cross sections of the connecting threads are in a triangle defined by three arc-shaped side lines, according to the structural design, internal connecting threads are tapped on a machined piece through three points, a heat effect appears in the locking-in process, after being cooled, the screw is prevented from walking, the radian of the arc is 55 to 60, the connecting threads at the angle are high in strength, and the cutting area and the radial force of the self-tapping screw are reduced in the locking-in process.
Description
Technical field
The utility model relates to a kind of bolt, specifically a kind of triangle self-tapping lock screw.
Background technique
Bolt is mechanical parts common in our daily life, bolt is generally made up of bolt head, bolt shank and flange plate, and screw rod is with externally threaded cylindrical body, and coordinates with nut, for being fastenedly connected two parts with through hole, be widely used in mechanical field; But this bolt in use, need on the nut of coupling, push in advance threaded internal thread, so not only operation is loaded down with trivial details, cost is higher, exists outside thread to mate problem more loose, that installation is not tight with internal thread after installing simultaneously, will bring certain potential safety hazard; And existing bolt head mounting type is more single, user cannot use external plate twist instrument to bolt head with regard to line operate, make using scope restricted.
Summary of the invention
The deficiency existing for prior art, the utility model provides on a kind of nut that not be used in coupling and pushes in advance threaded internal thread, and how function be not subject to spatial constraints, convenient installation, screw strength is high, the triangle self-tapping lock screw that locking property is good.
For achieving the above object, the utility model provides following technological scheme: a kind of triangle self-tapping lock screw, include bolt head, bolt shank, and be arranged at the flange plate between bolt head and bolt shank, described bolt head is shaped as hexagonal flange head, the inside of described bolt head is provided with a mounting groove, described bolt shank is divided into columniform upper part, columniform lower part, described upper part is connected with flange plate one end one, the bottom of described bolt shank is divided and is provided with connecting thread, the triangle that described connecting thread cross section is surrounded by three arc sidelines, the tooth form angle of described connecting thread is 55 degree～60 degree.
By adopting technique scheme, described bolt head is shaped as hexagonal flange head, and its inside is provided with a mounting groove, and inside and outside can operation, also passable in the situation that of less in certain operations space like this, facilitated greatly installation or removal bolt.
The triangle that described connecting thread cross section is surrounded by three arc sidelines, the design of this structure is carried out tapping thread by three points to processed piece,, and in the process of locking, have a thermal effect, after cooling, can play and prevent that screw from walking, connect thereby form; And the tooth form angle of described connecting thread is 55 degree～60 degree, this angle screw strength is high and reduced the area of cut and the radial force of tapping screw in the process of locking, thereby reduce the collapsing force to fixed hole in the time that tapping screw is installed, the possibility that further reduces chip to stop up fixed hole and to cause fixed hole cracking, has low moment and the high locking property of being screwed into.
The utility model is further set to: on described bolt shank, part is provided with annular arc groove with lower part joint.
By adopting technique scheme, on described bolt shank, part can better be locked with lower part joint arranging of arc groove of annular.
The utility model is further set to: described bolt head is shaped as hexagonal flange head, in the middle of six faces of described hexagonal flange head, is equipped with semi-circular recesses.
By adopting technique scheme, in the middle of six faces of hexagonal flange head, be equipped with semi-circular recesses, advantage is that spendable installation and removal instrument is more like this.
The utility model is further set to: described mounting groove is interior hexagonal mounting groove, square mounting groove or hexagonal blossom type mounting groove.
The utility model is further set to: described mounting groove is hexagonal blossom type mounting groove.
By adopting technique scheme, described mounting groove can carry out installing/dismounting by various corresponding instruments, the utility model is preferred hexagonal blossom type mounting groove, and can better prevent from installing time, to cross strong mounting groove impaired for the power of screwing.
The utility model is further set to: in the central bottom of described relative hexagonal blossom type mounting groove, be also provided with cross recess.
By adopting technique scheme, on bottom, also have additional cross recess, advantage is that installation and removal instrument is more.
The utility model is further set to: described bolt shank is structural carbon steel or alloyed steel structure.
By adopting technique scheme, structural carbon steel or alloyed steel structure make bolt shank intensity higher.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of a kind of triangle self-tapping lock screw of the utility model;
Fig. 2 is the plan view of a kind of triangle self-tapping lock screw of the utility model;
Fig. 3 is the utility model connecting thread cross sectional planes schematic diagram;
Fig. 4 is the plan view of a kind of triangle self-tapping lock screw of the utility model;
Reference character: 1, bolt head; 11, semi-circular recesses; 2, bolt shank; 21, upper part; 22, lower part; 3, flange plate; 4, mounting groove; 5, connecting thread; 6, annular arc groove; 7, cross recess.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model mode of execution is described in further detail.
A kind of triangle self-tapping lock screw as Figure 1-4, include bolt head 1, bolt shank 2, and be arranged at the flange plate 3 between bolt head 1 and bolt shank 2, described bolt head 1 is shaped as hexagonal flange head, the inside of described bolt head 1 is provided with a mounting groove 4, described bolt shank 2 is divided into columniform upper part 21, columniform lower part 22, described upper part 21 is connected with flange plate 3 one end one, the lower part 22 of described bolt shank 2 is provided with connecting thread 5, the triangle that described connecting thread 5 cross sections are surrounded by three arc sidelines, the tooth form angle of described connecting thread 5 is 55 degree～60 degree.
Be shaped as hexagonal flange head according to bolt head 1 described above, its inside is provided with a mounting groove 4, and inside and outside can operation, also passable in the situation that of less in certain operations space like this, facilitated greatly installation or removal bolt; And the triangle that surrounded by three arc sidelines of described connecting thread 5 cross sections, the design of this structure is attacked interior connecting thread by three points to processed piece, and in the process of locking, having a thermal effect, cooling can playing prevents that screw from walking later, connects thereby form; And the tooth form angle of described connecting thread 5 is 55 degree～60 degree, this angle connecting thread intensity is high and reduced the area of cut and the radial force of tapping screw in the process of locking, thereby reduce the collapsing force to fixed hole in the time that tapping screw is installed, the possibility that further reduces chip to stop up fixed hole and to cause fixed hole cracking, has low moment and the high locking property of being screwed into;
On described bolt shank 2, part 21 is provided with annular arc groove 6 with lower part 22 joints, and on described bolt shank 2, part 21 can better be locked with lower part 22 joint arranging of arc groove 6 of annular.
Described bolt head 1 is shaped as hexagonal flange head, in the middle of six faces of described hexagonal flange head, is equipped with semi-circular recesses 11, in the middle of six faces of hexagonal flange head, is equipped with semi-circular recesses 11, and advantage is that spendable installation and removal instrument is more like this.
Described mounting groove 4 is interior hexagonal mounting groove, square mounting groove or hexagonal blossom type mounting groove, adopts hexagonal blossom type mounting groove in the present embodiment, and when advantage is that hexagonal blossom type mounting groove 4 can better prevent from installing, to cross strong mounting groove 4 impaired for the power of screwing; And also having additional cross recess 7 in the central bottom of described relative hexagonal blossom type mounting groove 4, advantage is to select installation and removal instrument more like this.
In the present embodiment; the foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle; any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a triangle self-tapping lock screw, include bolt head, bolt shank and be arranged at bolt head and bolt shank between flange plate, it is characterized in that: described bolt head is shaped as hexagonal flange head, the inside of described bolt head is provided with a mounting groove, described bolt shank is divided into columniform upper part, columniform lower part, described upper part is connected with flange plate one end one, the bottom of described bolt shank is divided and is provided with connecting thread, the triangle that described connecting thread cross section is surrounded by three arc sidelines, the tooth form angle of described connecting thread is 55 degree～60 degree.
2. according to a kind of triangle self-tapping lock screw described in claim 1, it is characterized in that: on described bolt shank, part is provided with annular arc groove with lower part joint.
3. according to a kind of triangle self-tapping lock screw described in claim 1, it is characterized in that: in the middle of six faces of described hexagonal flange head, be equipped with semi-circular recesses.
4. according to a kind of triangle self-tapping lock screw described in claim 1 or 2, it is characterized in that: described mounting groove is interior hexagonal mounting groove, square mounting groove or hexagonal blossom type mounting groove.
5. according to a kind of triangle self-tapping lock screw described in claim 1 or 2, it is characterized in that: described mounting groove is hexagonal blossom type mounting groove.
6. a kind of triangle self-tapping lock screw according to claim 5, is characterized in that: in the central bottom of described relative hexagonal blossom type mounting groove, be also provided with cross recess.
7. according to a kind of triangle self-tapping lock screw described in claim 2, it is characterized in that, described bolt shank is structural carbon steel or alloyed steel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257659.0U CN203835917U (en) | 2014-05-20 | 2014-05-20 | Triangular self-tapping locking screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257659.0U CN203835917U (en) | 2014-05-20 | 2014-05-20 | Triangular self-tapping locking screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203835917U true CN203835917U (en) | 2014-09-17 |
Family
ID=51513764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420257659.0U Expired - Fee Related CN203835917U (en) | 2014-05-20 | 2014-05-20 | Triangular self-tapping locking screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203835917U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106397833A (en) * | 2016-10-10 | 2017-02-15 | 上海易扣精密件制造有限公司 | High-strength anti-interference plastic screw for smart phone and production method thereof |
| JP2018507375A (en) * | 2015-02-26 | 2018-03-15 | コールド・ヘディング・カンパニーＣｏｌｄ Ｈｅａｄｉｎｇ Ｃｏｍｐａｎｙ | Lightweight fastener design |
-
2014
- 2014-05-20 CN CN201420257659.0U patent/CN203835917U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018507375A (en) * | 2015-02-26 | 2018-03-15 | コールド・ヘディング・カンパニーＣｏｌｄ Ｈｅａｄｉｎｇ Ｃｏｍｐａｎｙ | Lightweight fastener design |
| CN106397833A (en) * | 2016-10-10 | 2017-02-15 | 上海易扣精密件制造有限公司 | High-strength anti-interference plastic screw for smart phone and production method thereof |
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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: 20140917 Termination date: 20180520 |