CN101025183A - Flat-top anti-theft screw - Google Patents
Flat-top anti-theft screw Download PDFInfo
- Publication number
- CN101025183A CN101025183A CN 200710048714 CN200710048714A CN101025183A CN 101025183 A CN101025183 A CN 101025183A CN 200710048714 CN200710048714 CN 200710048714 CN 200710048714 A CN200710048714 A CN 200710048714A CN 101025183 A CN101025183 A CN 101025183A
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- China
- Prior art keywords
- bolt
- nut
- inner bolt
- outer nut
- thread
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Abstract
The invention relates to a bolt part of a fastener, namely a flatheaded anti-theft bolt composed of inner bolt and outer nut, characterized in that: it is set with a fastening inner bolt, namely in shape, a roundheaded bolt composed of two sections of screw bolts concentric but different in diameter, the cap of the inner bolt is inserted in the round groove of the outer nut, the thread of the upper thicker section is a fine-pitch levogyrate light thread matching with the outer nut, and the outer nut is a short-lived nut only playing a role of driving the inner bolt to fasten and is of a shape of hex nut, and the middle hole thread of the outer nut is a fine-pitch levogyrate female thread which matches with the upper section of the inner bolt and whose locking intensity is lower than that of the inner bolt and the supporting locked nut. In use, firstly placing the inner bolt in the outer nut and screwing closely into a set of combined bolt which is placed in the locked net and then screwed by wrench, and when reaching the rated torque, the thread of the short-lived nut breaks the sliding filament to make it slide only in the periphery of the inner bolt so as to be unable to demount the inner fastening bolt by routine means and tool any more.
Description
Technical field
The screw part, the especially license plate that the present invention relates to a kind of fastening piece are decorated anti-theft screw.
Background technique
At present, known conventional screw is convenient to loading and unloading because of it, also is convenient to the theft of crime one's share of expenses for a joint undertaking and destroys; Some have the screw of anti-theft feature, are 0420098372.4,02153416.0 anti-theft screw as the patent No., but lack decorative artistic effect.
Summary of the invention
In order to overcome above-mentioned deficiency, the invention provides a kind of flat-top anti-theft screw, just can reach purpose not only antitheft but also attractive in appearance.
The technological scheme that the present invention solves its technical problem is: the flat-top anti-theft screw that is combined by inner bolt and outer nut, it is characterized in that: the inner bolt of fastening effect together is set, external form is for two saving the snap bolt that the concentric different screw combinations of diameter forms up and down, its cap embeds the circular groove of outer nut, the thick screw flight of last joint, it is the left-handed shallow thread of closely-pitched with the outer nut coupling, outer nut is only to work the short-lived nut that drives the fastening effect of inner bolt, the same hexagon nut of external form, mesopore be with inner bolt on the left-handed box thread of closely-pitched of joint screw rod coupling, its locking intensity is lower than the locking intensity of the nut of inner bolt and supporting locking, elder generation is with inner bolt during use, the outer nut of packing into screws into a suit screw assemblies.This screw assemblies is packed into and is tightened by spanner behind the locking nut, when reaching rated torque, short-lived nut thread destroys stripped thread, can only skid in the inner bolt periphery, just again interior fastening screw trip bolt can't be unloaded with conventional means and instrument, to reach antitheft purpose, with the bolt head cap lid of inner bolt, be arranged to the plane end socket, available stainless steel or colored plastic in addition, light not only attractive in appearance is gorgeous but also can't be with the dismounting of conventional tool holder, and that plays that general anti-theft screw can't play has a coloured decorating action of light.
The invention has the beneficial effects as follows: simple in structure, tamper robber is functional, ornamental by force, cost is low.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is an inner bolt panorama schematic representation, and Fig. 2 is an outer nut panorama schematic representation, and Fig. 3 is that the inner bolt master looks schematic representation, and Fig. 4 is that outer nut is dissected schematic representation, and Fig. 5 is that the screw assemblies that is assembled into is dissected schematic representation, and Fig. 6 is a schematic top plan view.
The cylindrical cap of plane end socket of 1. inner nuts among the figure is 2. with the left-handed shallow thread of closely-pitched of outer nut coupling, 3. with the coarse thread of locking nut coupling, 4. with inner bolt round end cap interior circular groove movingly, 5. with the left-handed box thread of closely-pitched of inner bolt coupling.
Embodiment
In the drawings, the inner bolt of fastening effect together is set, external form is for two saving the snap bolt that the concentric different screw combinations of diameter forms up and down, its cap embeds the circular groove (4) of outer nut, the thick screw flight of last joint, it is the left-handed shallow thread of closely-pitched (2) with the outer nut coupling, outer nut is only to work the short-lived nut that drives the fastening effect of inner bolt, the same hexagon nut of external form, mesopore be with inner bolt on the left-handed box thread of closely-pitched (5) of joint screw rod coupling, its locking intensity is lower than the locking intensity of the nut of inner bolt and supporting locking, and is first with inner bolt during use, the outer nut of packing into screws into a suit screw assemblies.This screw assemblies is packed into and is tightened by spanner behind the locking nut, and when reaching rated torque, short-lived nut thread destroys stripped thread, can only skid in the inner bolt periphery, just again interior fastening screw trip bolt can't be unloaded with conventional means and instrument, to reach antitheft purpose.In addition, be arranged to the plane end socket with the bolt head cap lid of inner bolt, available stainless steel or colored plastic, light not only attractive in appearance is gorgeous but also can't dismantle with conventional tool holder, and that plays that general anti-theft screw can't play has a coloured decorating action of light,
Claims (3)
1, a kind of flat-top anti-theft screw, combine by inner bolt and outer nut, it is characterized in that: the inner bolt of fastening effect together is set, external form is for two saving the snap bolt that the concentric different screw combinations of diameter forms up and down, the thick screw flight of last joint, it is the left-handed shallow thread of closely-pitched (2) with the outer nut coupling, outer nut is only to work the short-lived nut that drives the fastening effect of inner bolt, the same hexagon nut of external form, mesopore be with inner bolt on the left-handed box thread of closely-pitched (5) of joint screw rod coupling, its locking intensity is lower than the locking intensity of the nut of inner bolt and supporting locking.
2, by the described flat-top anti-theft screw of claim 1, it is characterized in that: the circular cap cover of inner bolt, the circular groove (4) of embedding outer nut.
3, by the described flat-top anti-theft screw of claim 1, it is characterized in that: the bolt head cap lid of its inner bolt, be arranged to the plane end socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710048714 CN101025183A (en) | 2007-03-23 | 2007-03-23 | Flat-top anti-theft screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710048714 CN101025183A (en) | 2007-03-23 | 2007-03-23 | Flat-top anti-theft screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101025183A true CN101025183A (en) | 2007-08-29 |
Family
ID=38743721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710048714 Pending CN101025183A (en) | 2007-03-23 | 2007-03-23 | Flat-top anti-theft screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101025183A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982514A (en) * | 2014-06-05 | 2014-08-13 | 常州市南飞机械有限公司 | Multifunctional combined bolt |
-
2007
- 2007-03-23 CN CN 200710048714 patent/CN101025183A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982514A (en) * | 2014-06-05 | 2014-08-13 | 常州市南飞机械有限公司 | Multifunctional combined bolt |
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |