CN201013716Y - Tubular shape concavo-convex automobile license tag antitheft screw nail - Google Patents
Tubular shape concavo-convex automobile license tag antitheft screw nail Download PDFInfo
- Publication number
- CN201013716Y CN201013716Y CNU2007200790570U CN200720079057U CN201013716Y CN 201013716 Y CN201013716 Y CN 201013716Y CN U2007200790570 U CNU2007200790570 U CN U2007200790570U CN 200720079057 U CN200720079057 U CN 200720079057U CN 201013716 Y CN201013716 Y CN 201013716Y
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- China
- Prior art keywords
- screw
- nut
- thread
- inner bolt
- internal
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relate to a screw part of a fastener, in particular to a tubular antitheft screw with conical concave of license plate while the existing anti-theft screws are all absent of the function of decoration. The utility model consists of an internal screw and an external screw nut and is characterized in that the internal screw for fastening is provided, a bolt with a rounded cap and a conical concave at the cap consists of two concentric screw rods with different diameters, the cap is embedded into the round slot of the external screw nut, the screw thread of the upper rod with bigger diameter is a shallow flight left hand fine thread which is meshes with the external screw nut, the external screw nut is a provisional nut which drives the internal screw to fasten and is tubular, a center hole has a left hand fine box thread which meshes with the worm of the upper part of the internal screw, the strength of fastening in the center hole is lower than that between the internal screw and the corresponding fastening screw nut, and the internal screw is put into the external screw nut to be screwed and to compose a set of composite screw for application. The composite screw is put into the fastening screw nut to be fastened with a pipe wrench and the thread is broken by the thread of the provisional nut under a certain torque to make the short screw nut slip around the internal screw. So, the internal fastening screw can not be removed by normal methods or tools, so as to prevent theft and gain a good effect of decoration.
Description
Technical field
The utility model relates to a kind of screw part 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, but lack decorative artistic effect.
Summary of the invention
In order to overcome above-mentioned deficiency, the utility model provides a kind of tubulose male and fomale(M﹠F) 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 tubulose male and fomale(M﹠F) 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, be 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 a tubulose, 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.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, 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 male and fomale(M﹠F) 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.
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 concavo-convex planar end socket 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. 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, be 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, external form is a tubulose, 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 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, 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 male and fomale(M﹠F) 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. tubulose male and fomale(M﹠F) 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 round end male and fomale(M﹠F) 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, external form is a tubulose, 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 tubulose male and fomale(M﹠F) license plate 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 tubulose male and fomale(M﹠F) license plate anti-theft screw of claim 1, it is characterized in that: the bolt head cap lid of its inner bolt, be arranged to the male and fomale(M﹠F) end socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200790570U CN201013716Y (en) | 2007-04-09 | 2007-04-09 | Tubular shape concavo-convex automobile license tag antitheft screw nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200790570U CN201013716Y (en) | 2007-04-09 | 2007-04-09 | Tubular shape concavo-convex automobile license tag antitheft screw nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201013716Y true CN201013716Y (en) | 2008-01-30 |
Family
ID=39025505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200790570U Expired - Fee Related CN201013716Y (en) | 2007-04-09 | 2007-04-09 | Tubular shape concavo-convex automobile license tag antitheft screw nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201013716Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104873017A (en) * | 2015-05-29 | 2015-09-02 | 天津理工大学 | Legless stool used in bed and working method of legless stool |
-
2007
- 2007-04-09 CN CNU2007200790570U patent/CN201013716Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104873017A (en) * | 2015-05-29 | 2015-09-02 | 天津理工大学 | Legless stool used in bed and working method of legless stool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |