CN201027779Y - Flat-top antitheft screw nail - Google Patents
Flat-top antitheft screw nail Download PDFInfo
- Publication number
- CN201027779Y CN201027779Y CNU2007200790496U CN200720079049U CN201027779Y CN 201027779 Y CN201027779 Y CN 201027779Y CN U2007200790496 U CNU2007200790496 U CN U2007200790496U CN 200720079049 U CN200720079049 U CN 200720079049U CN 201027779 Y CN201027779 Y CN 201027779Y
- Authority
- CN
- China
- Prior art keywords
- bolt
- nut
- inner bolt
- outer nut
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a bolt part of fastener, in particular to a flat topping security bolt, which is formed by combining of an inner bolt and an outer nut; the utility model is characterized in that the profile of the inner bolt with the fastening function is a round head bolt which is formed by an upper screw rod and a lower screw rod which are concentric and different in diameter, a cap of the round head bolt is embedded in a round groove of the outer nut, the screw thread of the upper screw rod which is relatively wide is the fine left turn shallow thread matching with the outer nut; the outer nut is the short-life nut for driving the fastening function of the inner bolt, the profile is like a hexagon nut, a middle hole is provided with the fine left turn female thread matching with the upper rod of the inner bolt, the locking intensity is lower than that of a nut which matches with and is tightly held by the inner bolt; when the utility model is used, firstly, the outer nut is arranged in the inner bolt, forming a set of combination bolt by tightly screwing on; secondly, the lock nut is arranged in the combination bolt and then is tightly screwed on by a wrench, when the rated torque is reached, the short-life nut has the screw thread damaged and only slides on the inner bolt, thereby the inner fastening bolt can not be dismounted by the common ways and tools.
Description
Technical field
The utility model relates to a kind of screw part, especially license plate of fastening piece and decorates 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 utility model provides a kind of flat-top anti-theft screw, just can reach purpose not only antitheft but also attractive in appearance.
The technical scheme in the invention for solving the 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 beneficial effects of the utility model are: simple in structure, tamper robber is functional, ornamental by force, cost is low.
Description of drawings
The utility model is described in further detail 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, 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. the bolt head cap with inner bolt covers in addition, be arranged to the plane end socket, available stainless steel or colored plastic, 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.
Claims (3)
1. 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 |
|---|---|---|---|
| CNU2007200790496U CN201027779Y (en) | 2007-04-09 | 2007-04-09 | Flat-top antitheft screw nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200790496U CN201027779Y (en) | 2007-04-09 | 2007-04-09 | Flat-top antitheft screw nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201027779Y true CN201027779Y (en) | 2008-02-27 |
Family
ID=39131988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200790496U Expired - Fee Related CN201027779Y (en) | 2007-04-09 | 2007-04-09 | Flat-top antitheft screw nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201027779Y (en) |
-
2007
- 2007-04-09 CN CNU2007200790496U patent/CN201027779Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080227 |