CN201193641Y - Drum shape flat top antitheft screw nail for license plate - Google Patents
Drum shape flat top antitheft screw nail for license plate Download PDFInfo
- Publication number
- CN201193641Y CN201193641Y CNU2008200632073U CN200820063207U CN201193641Y CN 201193641 Y CN201193641 Y CN 201193641Y CN U2008200632073 U CNU2008200632073 U CN U2008200632073U CN 200820063207 U CN200820063207 U CN 200820063207U CN 201193641 Y CN201193641 Y CN 201193641Y
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- CN
- China
- Prior art keywords
- screw
- nut
- inner bolt
- thread
- outer nut
- 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 screw part of a fastener, particularly to a drum shaped flat top license plate anti-theft screw which comprises an inner screw and an outer nut; the utility model is characterized in that the inner screw used for fastening is a cheese head bolt which consists of two sections of screw rods which are concentric with different diameters; the cap is inserted in the circular groove of the outer nut; the wider screw thread of the upper section is a fine left hand shallow thread which is matched with the outer nut; the outer nut is an ephemeral nut which is in the shape of sphere drum and used to drive the inner screw for fastening; and the middle hole is a fine left hand female thread which is matched with the upper screw rod, the fastening strength is lower than that of the inner screw and the matched locking nut; when in use, the inner screw is arranged in the outer screw nut to be screwed into a set of combined screw, and the combined screw is placed in the locking nut, and then is screwed by a pipe twist to reach the rated torque, the thread of the ephemeral nut are damaged and slide so that the ephemeral nut can only slip on the periphery of the inner screw; thus the inner screw can not be demounted by the conventional methods and tools.
Description
Technical field
The utility model relates to a kind of bolt portion of fastening piece.
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 drum type flat-top license plate 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 drum type flat-top license plate 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 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, external form is the sphere drum type, 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 pipe wrench 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.With the bolt head cap of inner bolt lid, be arranged to the plane end socket, available stainless steel or colored plastic, the gorgeous fork of light both attractive in appearance can't be dismantled with 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 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 plane end socket circular cap cover of 1. inner bolts among the figure, 2. with the left-handed shallow thread of closely-pitched of outer nut coupling, 3. with the coarse thread of locking nut coupling, 4. circular groove is 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, and external form is for two saving the snap bolt that the concentric different screw combinations of diameter forms up and down, and its cap embeds the circular groove (4) of outer nut, the thick screw flight of last joint is the left-handed shallow thread of closely-pitched (2) with the outer nut coupling.Outer nut is only to work a short-lived nut that drives the fastening effect of inner bolt, and external form is the sphere drum type, mesopore be with inner bolt on joint screw rod coupling the left-handed box thread of closely-pitched its lock the locking intensity that intensity is lower than the nut of inner bolt and supporting locking.Earlier with inner bolt, the outer nut of packing into screws into a suit screw assemblies during use.This screw assemblies is packed into and is tightened by pipe wrench 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 (2)
1. drum type flat-top license plate 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, be and the left-handed shallow thread of closely-pitched (2) of outer nut coupling, its circular cap cover is arranged to the plane end socket; Outer nut is only to work a short-lived nut that drives the fastening effect of inner bolt, and external form is the sphere drum type, the left-handed box thread of closely-pitched (5) that mates with inner bolt that mesopore is provided with that locking intensity is lower than that inner bolt and supporting locking nut lock intensity.
2. by the described drum type flat-top license plate anti-theft screw of claim 1, it is characterized in that: the plane end socket circular cap cover of inner bolt, the circular groove of embedding outer nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200632073U CN201193641Y (en) | 2008-04-29 | 2008-04-29 | Drum shape flat top antitheft screw nail for license plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200632073U CN201193641Y (en) | 2008-04-29 | 2008-04-29 | Drum shape flat top antitheft screw nail for license plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201193641Y true CN201193641Y (en) | 2009-02-11 |
Family
ID=40393177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200632073U Expired - Fee Related CN201193641Y (en) | 2008-04-29 | 2008-04-29 | Drum shape flat top antitheft screw nail for license plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201193641Y (en) |
-
2008
- 2008-04-29 CN CNU2008200632073U patent/CN201193641Y/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: 20090211 |