CN201057209Y - Convex-shoulder tubular convex surface antitheft screw nail of automobile license tag - Google Patents
Convex-shoulder tubular convex surface antitheft screw nail of automobile license tag Download PDFInfo
- Publication number
- CN201057209Y CN201057209Y CNU2007200792561U CN200720079256U CN201057209Y CN 201057209 Y CN201057209 Y CN 201057209Y CN U2007200792561 U CNU2007200792561 U CN U2007200792561U CN 200720079256 U CN200720079256 U CN 200720079256U CN 201057209 Y CN201057209 Y CN 201057209Y
- Authority
- CN
- China
- Prior art keywords
- bolt
- inner bolt
- nut
- fastening
- 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 bolt part of a fastening device. No decorative effect is available to existing anti-theft bolts, while a shouldered pipe-shaped concave pyramidal-surface automobile plate anti-theft bolt is combined by an inner bolt and an outer nut and is characterized in that the inner bolt for fastening purpose is provided; a cap of a round-head concave pyramidal-surface bolt that is combined by screws divided into two sections that is concentric but with different diameters is embedded into a round concave groove of the outer nut; screw threads at the upper section are fine levorotary shallow screw threads; the outer nut is nut that is with short service life and for promoting fastening of the inner bolt; the outer nut takes the shape of a pipe, with edge of the upper opening extruding in arc shape; a middle hole is with fine levorotary screw threads that are matched with the upper section of the bolt, fastening performance of which is lower than the that between the inner bolt and the matching fastening bolt. The bolt assembly, after being arranged into the fastening nut, is tightened by tubular forceps; after reaching rated torque, the nut with short service life destroys stripped threads, and then slides only outside the circumference of the inner bolt, thereby making available anti-theft and decorative effects.
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 convex shoulder cannulate drill concave surface 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 convex shoulder cannulate drill concave surface 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 nut line 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 heavy wall tubulose, and 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 bore the concave surface 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.
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 awl concave shape end socket of 1. inner nuts 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, 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, and external form is the heavy wall tubulose, and the upper orifice edge is arcuation projection (6); 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, screw 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 bore the concave surface 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. convex shoulder cannulate drill concave surface 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 is and the left-handed shallow thread of closely-pitched (2) of outer nut coupling that outer nut is only to work the short-lived nut that drives the fastening effect of inner bolt, external form is the heavy wall tubulose, and the upper orifice edge is arcuation projection (6); 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 inner bolt and supporting locking nut.
2. by the described convex shoulder cannulate drill concave surface 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 convex shoulder cannulate drill concave surface 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 bore the concave surface end socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200792561U CN201057209Y (en) | 2007-04-23 | 2007-04-23 | Convex-shoulder tubular convex surface antitheft screw nail of automobile license tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200792561U CN201057209Y (en) | 2007-04-23 | 2007-04-23 | Convex-shoulder tubular convex surface antitheft screw nail of automobile license tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201057209Y true CN201057209Y (en) | 2008-05-07 |
Family
ID=39426050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200792561U Expired - Fee Related CN201057209Y (en) | 2007-04-23 | 2007-04-23 | Convex-shoulder tubular convex surface antitheft screw nail of automobile license tag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201057209Y (en) |
-
2007
- 2007-04-23 CN CNU2007200792561U patent/CN201057209Y/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: 20080507 |