CN201062622Y - Shrouded tubular cone-concave anti-theft breakage-proof screw for license plates - Google Patents
Shrouded tubular cone-concave anti-theft breakage-proof screw for license plates Download PDFInfo
- Publication number
- CN201062622Y CN201062622Y CNU2007200801518U CN200720080151U CN201062622Y CN 201062622 Y CN201062622 Y CN 201062622Y CN U2007200801518 U CNU2007200801518 U CN U2007200801518U CN 200720080151 U CN200720080151 U CN 200720080151U CN 201062622 Y CN201062622 Y CN 201062622Y
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- CN
- China
- Prior art keywords
- screw
- nut
- theft
- outer nut
- inner bolt
- 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. The prior anti-theft screw has no decorative effect. The tubular anti-theft and anti-destroying vehicle license plate screw with protrudent shoulder and conical concave surface is composed of an inner screw and an outer nut. The utility model is characterized in that the inner screw is arranged for fastening, the profile of the inner screw is a round head and conical concave surface bolt composed of an upper screw rod and a lower screw rod which are homocentric and have different diameters, the cap is inserted into the conical groove of the outer nut, the thread of the thicker upper screw rod is fine left-hand shallow thread matched with the outer nut, the outer nut is a short-life nut just driving the fastening function of the inner screw; the profile of the outer nut is tubular, and the edge of the upper tube mouth is an arc protuberance; the middle hole is a fine left hand female thread matched with the upper screw rod of the inner screw, and the fastening strength is lower than the fastening strength between the inner screw and a matched locking nut. The combined screw is installed into the locking nut and then tightened through a pipe wrench, when the rated torque is achieved, the thread of the short-life nut is broken, is slippery, and can only slip on the periphery of the inner screw, and therefore, the utility model is anti-theft and provided with strong decorative effect.
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, 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 anti-damaged 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 anti-damaged 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 conical cap bolt that the concentric different screw combinations of diameter forms up and down, its cap embeds the cone-shaped groove of outer nut, the thick screw flight of last joint is 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, and 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 awl concave shape 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 the conical cap of inner bolt inner conical 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 conical cap bolt that the concentric different screw combinations of diameter forms up and down, its cap embeds the cone-shaped groove (4) of outer nut, the thick screw flight of last joint, be that the left-handed shallow thread of closely-pitched (2) outer nut with outer nut coupling is a short-lived nut that only plays the fastening effect of drive 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, elder generation was with inner bolt when the locking intensity that its locking intensity is lower than the nut of inner bolt and supporting locking was used, 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, in addition the bolt head cap of inner bolt is covered to reach antitheft purpose, 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 anti-damaged 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 conical cap 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 anti-damaged screw of claim 1, it is characterized in that: the conical cap of inner bolt, the cone-shaped groove (4) of embedding outer nut.
3. by the described convex shoulder cannulate drill concave surface license plate anti-theft anti-damaged 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 |
|---|---|---|---|
| CNU2007200801518U CN201062622Y (en) | 2007-07-02 | 2007-07-02 | Shrouded tubular cone-concave anti-theft breakage-proof screw for license plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200801518U CN201062622Y (en) | 2007-07-02 | 2007-07-02 | Shrouded tubular cone-concave anti-theft breakage-proof screw for license plates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201062622Y true CN201062622Y (en) | 2008-05-21 |
Family
ID=39450997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200801518U Expired - Fee Related CN201062622Y (en) | 2007-07-02 | 2007-07-02 | Shrouded tubular cone-concave anti-theft breakage-proof screw for license plates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201062622Y (en) |
-
2007
- 2007-07-02 CN CNU2007200801518U patent/CN201062622Y/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: 20080521 |