CN201335083Y - Drum-shaped convex-shoulder flat-top anti-theft bolt for license plates - Google Patents
Drum-shaped convex-shoulder flat-top anti-theft bolt for license plates Download PDFInfo
- Publication number
- CN201335083Y CN201335083Y CNU2009200789746U CN200920078974U CN201335083Y CN 201335083 Y CN201335083 Y CN 201335083Y CN U2009200789746 U CNU2009200789746 U CN U2009200789746U CN 200920078974 U CN200920078974 U CN 200920078974U CN 201335083 Y CN201335083 Y CN 201335083Y
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- Prior art keywords
- bolt
- nut
- internal
- inner bolt
- internal bolt
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Abstract
The utility model relates to a bolt part of a fastening piece. The drum-shaped convex-shoulder flat-top anti-theft bolt for license plates consists of an internal bolt and an external nut, and is characterized in that the internal bolt serving the fastening function is arranged; the outer shape of the internal bolt is a round-head bolt consisting of an upper section of screw rod and a lower section of screw rod which are concentric but different in diameter; the hood of the internal bolt is embedded in a round-shaped groove of the external nut; the screw threads of the upper section of the thicker screw rod adopt the closely-pitched left-handed hollow threads matched with the external nut; the external nut is a short-life nut driving the internal bolt to serve the fastening function; the external nut is in the shape of a thick-wall drumhead tube; arc protrusions are formed on the edge of an upper tube orifice; an intermediate hole adopts closely-pitched left-handed female threads matched with the upper section of screw rod of the internal bolt; and the locking strength of the internal bolt is less than that of the internal bolt and the nut matched and locked with the internal bolt. When in use, the internal bolt is assembled in the external nut, and the internal bolt and the external nut are screwed tightly to form a set-assembled combination bolt. The combination bolt is screwed tightly through pipe tongs after being assembled in the locking nut; when the rated torque is achieved, the short-life nut threads break the slippery threads, so that the combination bolt just can slip on the periphery of the internal bolt, and the internal fastening bolt can not be detached with the regular methods and tools.
Description
Technical field
The utility model relates to a kind of bolt portion of fastening piece, and especially license plate is 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 utility model provides a kind of drum type convex shoulder 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 convex shoulder 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 a heavy wall drum facial canal shape, the upper orifice edge is the arcuation projection, 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, 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 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. with inner bolt round end cap interior circular groove movingly, 5. with the left-handed box thread of closely-pitched of inner bolt coupling, the 6. upper orifice of arcuation projection.
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 the short-lived nut that drives the fastening effect of inner bolt, external form is a heavy wall drum facial canal shape, the upper orifice edge is the arcuation projection, 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, 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, a kind of drum type convex shoulder 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 the short-lived nut that drives the fastening effect of inner bolt, and external form is a heavy wall drum facial canal shape, and the upper orifice edge is the arcuation projection; 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 inner bolt and supporting locking nut locking intensity.
2, by the described drum type convex shoulder 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 |
|---|---|---|---|
| CNU2009200789746U CN201335083Y (en) | 2009-02-10 | 2009-02-10 | Drum-shaped convex-shoulder flat-top anti-theft bolt for license plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200789746U CN201335083Y (en) | 2009-02-10 | 2009-02-10 | Drum-shaped convex-shoulder flat-top anti-theft bolt for license plates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201335083Y true CN201335083Y (en) | 2009-10-28 |
Family
ID=41286734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200789746U Expired - Fee Related CN201335083Y (en) | 2009-02-10 | 2009-02-10 | Drum-shaped convex-shoulder flat-top anti-theft bolt for license plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201335083Y (en) |
-
2009
- 2009-02-10 CN CNU2009200789746U patent/CN201335083Y/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: 20091028 Termination date: 20100210 |