CN101701596A - Disassembly preventing bolt - Google Patents
Disassembly preventing bolt Download PDFInfo
- Publication number
- CN101701596A CN101701596A CN200910191325A CN200910191325A CN101701596A CN 101701596 A CN101701596 A CN 101701596A CN 200910191325 A CN200910191325 A CN 200910191325A CN 200910191325 A CN200910191325 A CN 200910191325A CN 101701596 A CN101701596 A CN 101701596A
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- neck section
- head
- thin neck
- diameter
- bolt
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Abstract
The invention discloses a disassembly preventing bolt which is provided with a hexagon head (1) and a rod body (2). A fastening head (3) is arranged at one end of the rod body (2) close to the hexagon head (1) and connected with the hexagon head (1) through a thin neck section (4); and the diameter of the thin neck section (4) is less than that of the rod body (2). The thin neck section (4) is a cylinder with two big ends and a small middle part, and the diameter of the smallest part in the middle of the thin neck section (4) is 1/3-1/2 of the diameter of the rod body (2). The disassembly preventing bolt has simple structure, easy processing, low cost and convenient operation, can effectively prevent the disassembly while meeting consistent production and has obvious theftproof effect.
Description
Technical field
The present invention relates to a kind of fastening piece, particularly the bolt of anti-dismounting.
Background technique
Bolt is a kind of part commonly used, can be widely used in the fastening occasion of various needs.The tightening or dismantle of bolt all turns hexagon head by conventional tool such as spanner etc. and realizes, because the hexagon head of bolt is generally exposed outside, if some special article such as Motor Vehicle lockset, antitheft door, household electric appliance etc. adopt bolt to install, because of bolt be disassembled easily be easy to stolen.Do not need to dismantle or needs are strengthened antitheft situation at some, some bolt changes to abnormity with hexagon head, be equipped with the special tool that adapts with it simultaneously and carry out installation or removal, though can play antitheft effect so at short notice, but, be easy to lose anti-theft feature along with special tool is copied.
Chinese patent 200720093741.4 discloses a kind of anti-demounting bolt on May 14th, 2008, and this bolt is made up of twisting head, fastener head and threaded body, at an end of threaded body fastener head is set, and this fastener head links to each other with the twisting head.During assembling, anti-demounting bolt is installed on the object that needs to connect earlier, turns the twisting head with spanner then fastener head is tightened, when tightening to tightening torque, bolt twisting head twists off, and connects by the fastener head that has supporting surface to clamp, and fastener head is an oval head, can't twisting, thereby also can't dismantle.The deficiency that above structure exists is:
1, the tip by two conical surfaces links to each other between twisting head and the fastener head, and the gap between two conical surfaces is very narrow and small, processing difficulties when extrusion modling, and cost of production is higher.
2, the discontinuity of connecting place between twisting head and the fastener head is easy to generate stress and concentrates, and causes the expection moment of torsion of same batch of bolt to differ greatly, and is difficult to satisfy the requirement that conformity is produced.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of anti-demounting bolt that is easy to processing and fabricating.
Technological scheme of the present invention is as follows: a kind of anti-demounting bolt, have hexagon head, the body of rod, fastener head and thin neck section, wherein fastener head is arranged on the end of the described body of rod near hexagon head, and this fastener head links to each other with hexagon head by thin neck section, and the diameter of described thin neck section is less than the diameter of the body of rod.
Adopt above technological scheme, hexagon head is made according to the head of plain bolt, can use conventional tool to tighten.The present invention need not dismantle or antitheft occasion after being specifically designed to bolton, during use, turns hexagon head earlier, connected piece is fastening, fastener head on the bolt is pressed on the connected piece, continues then to strengthen screw-down torque, because thin neck section is the part of whole bolt minimum, the structural strength minimum at this place, bolt is twisted off from thin neck section like this, and hexagon head comes off, and has only fastener head to expose outside at connected piece, because of fastener head is difficult to twisting, prevent the purpose dismantled so reached., not only stressed even between hexagon head and the fastener head by the thin neck section transition, avoid stress to concentrate, and helped processing and fabricating, can satisfy the requirement that conformity is produced.
Above-mentioned thin neck section is the cylinder of being small at both ends and big in the middle, and the diameter at minimum place is 1/3～1/2 of a body of rod diameter in the middle of the thin neck section.Above structure is easy to processing on the one hand, and on the other hand, thin neck section is stressed evenly, and helps bolt and twisted into two parts from the minimum in the middle of the thin neck section.The diameter at minimum place can not be less than 1/3 of body of rod diameter in the middle of the thin neck section, otherwise just causes bolt to be twisted into two parts easily in fastening process, makes that the fastening effect of connected piece is not firm; The diameter at minimum place can not be required great effort otherwise twist into two parts bolt greater than 1/2 of body of rod diameter very much in the middle of the thin neck section.
The external frame of above-mentioned fastener head is circular, and when using instrument twisting fastener head like this, instrument can skid by relative fastener head, has further ensured the effect of anti-dismounting.
Beneficial effect: the present invention is simple in structure, easy processing, cost are low, easy to operate, when satisfying conformity and producing, can effectively prevent dismounting, and anti-theft effect is obvious.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1, the present invention is a monolithic construction, is followed successively by hexagon head 1, thin neck section 4, fastener head 3 and the body of rod 2 from top to bottom, and the axis of each several part is on same straight line.Wherein the structure of the hexagon head 1 and the body of rod 2 all adopts prior art, does not do at this and gives unnecessary details.Be formed with fastener head 3 in the upper end of the described body of rod 2, the external frame of this fastener head 3 is circular, diameter is greater than the diameter of the body of rod 2, and fastener head 3 links to each other with hexagon head 1 by thin neck section 4, the cylinder of described thin neck section 4 for being small at both ends and big in the middle, the diameter at minimum place is 1/3～1/2 of the body of rod 2 diameters in the middle of the thin neck section 4.The diameter at minimum place can be determined according to actual needs in the middle of the thin neck section 4.
When the present invention is used to assemble, earlier turn hexagon head 1 with instruments such as spanners, connected piece is fastening, the fastener head 3 on the bolt is pressed on the connected piece, continue to strengthen screw-down torque then, because thin neck section 4 is parts of whole bolt minimum, the structural strength minimum at this place, bolt is twisted off from thin neck section 4 like this, hexagon head 1 comes off, have only fastener head 3 to expose outside,, prevent the purpose dismantled so reached because of fastener head 3 can't twisting at connected piece.
Claims (3)
1. anti-demounting bolt, have the hexagon head (1) and the body of rod (2), end at the close hexagon head (1) of the body of rod (2) is provided with fastener head (3), it is characterized in that: described fastener head (3) links to each other with hexagon head (1) by thin neck section (4), and the diameter of described thin neck section (4) is less than the diameter of the body of rod (2).
2. anti-demounting bolt according to claim 1 is characterized in that: the cylinder of described thin neck section (4) for being small at both ends and big in the middle, the diameter at minimum place is 1/3～1/2 of the body of rod (a 2) diameter in the middle of the thin neck section (4).
3. anti-demounting bolt according to claim 1 is characterized in that: the external frame of described fastener head (3) is for circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910191325A CN101701596A (en) | 2009-11-03 | 2009-11-03 | Disassembly preventing bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910191325A CN101701596A (en) | 2009-11-03 | 2009-11-03 | Disassembly preventing bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101701596A true CN101701596A (en) | 2010-05-05 |
Family
ID=42156520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910191325A Pending CN101701596A (en) | 2009-11-03 | 2009-11-03 | Disassembly preventing bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101701596A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760978A (en) * | 2011-04-27 | 2012-10-31 | 泰科电子(上海)有限公司 | Electrically connecting device |
| CN103032442A (en) * | 2013-01-21 | 2013-04-10 | 张家港固耐特围栏系统有限公司 | Bolt for mounting of rail |
| CN107630884A (en) * | 2016-07-18 | 2018-01-26 | 天津市天龙得冷成型部件有限公司 | Anti-dropout alignment pin is used in injection |
-
2009
- 2009-11-03 CN CN200910191325A patent/CN101701596A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102760978A (en) * | 2011-04-27 | 2012-10-31 | 泰科电子(上海)有限公司 | Electrically connecting device |
| CN102760978B (en) * | 2011-04-27 | 2015-04-01 | 泰科电子(上海)有限公司 | Electrically connecting device |
| CN103032442A (en) * | 2013-01-21 | 2013-04-10 | 张家港固耐特围栏系统有限公司 | Bolt for mounting of rail |
| CN107630884A (en) * | 2016-07-18 | 2018-01-26 | 天津市天龙得冷成型部件有限公司 | Anti-dropout alignment pin is used in injection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20100505 |