CN201666302U - Passive theftproof bolt and nut - Google Patents
Passive theftproof bolt and nut Download PDFInfo
- Publication number
- CN201666302U CN201666302U CN2010201239430U CN201020123943U CN201666302U CN 201666302 U CN201666302 U CN 201666302U CN 2010201239430 U CN2010201239430 U CN 2010201239430U CN 201020123943 U CN201020123943 U CN 201020123943U CN 201666302 U CN201666302 U CN 201666302U
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- nut
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- bolt
- screw rod
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- Expired - Fee Related
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Abstract
The utility model relates to a passive theftproof bolt and a nut which are characterized in that the foundation outline surfaces of a screw rod head and the nut are arranged to be circular conical surfaces; the circular conical surfaces of the screw rod head and the nut are provided with 4-12 oblique teeth; the bottoms of the screw rod head and the nut, matched with a workpiece, are provided with looseness-proof teeth; and the cross sections of the oblique teeth and the looseness-proof teeth are shaped like sawtooth. As the oblique teeth are only provided with acting points in the screwing direction without the acting points in screwing-out direction, the bolt and the nut can not be wholly removed by using conventional hand tool even the special tool of the utility model, but can be further tightened by using the special tool when the parts or components are loosened after long-time usage; and as the bottoms of the screw rod head and the nut, matched with the workpiece, are provided with the looseness-proof teeth, the looseness-proof teeth are tightly meshed with the workpiece contacting surface after being tightened and firmly clamped on the workpiece surface just like a pawl of a ratchet wheel, thus obtaining good theftproof effect.
Description
Technical field:
The utility model relates to a kind of fastening piece, particularly a kind of passive type theftproof bolt, nut.
Background technique:
Bolt, nut are fastening pieces commonly used at present, are widely used for fastenings or member.The profile of existing screw head, nut adopts the hexagonal cylindricality, adopt existing common tool can be to its lemon tight or unclamp, when existing bolt, nut place the open air to be used for fastenings or member, workpiece, the stolen incident of equipment often take place, and cause the normally operation of safety of this facility, equipment.For example: the angle member of the various workpiece Jun Yong lookout Zhan observation tower of power communication iron tower, power transformer, the unmanned communication base station, expressway steel guardrail, the permanent metal parts of railroad bridge, open-air oil transportation, stolen phenomenon is arranged during the gas pipeline guardrail, national wealth and people's life safety are constituted certain threat, the property loss that above-mentioned example is caused every year in China reaches tens million of units.To be used for bolt, the nut of fastenings or member on the external facilities and to be dismantled privately in order to prevent to place by other people, people solve by the method that bolt, nut are welded together at present, this has inconvenience in operation, in case after nut weldering extremely, just can not have been tightened up again after dead part or member take place to become flexible as if welding.
The model utility content
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of a kind of passive type theftproof bolt, nut with theftproof performance is provided.
For achieving the above object, the technological scheme that the utility model adopted is: this passive type theftproof bolt, nut, comprise screw head, screw rod, nut, it is characterized in that: the foundation outline face of screw head, nut is set to conical surface, is provided with 4-12 helical teeth on the conical surface of screw head, nut; Be provided with locking tooth in the bottom surface that screw head, nut and workpiece match; The cross section indentation of helical teeth, locking tooth.
Described a kind of passive type theftproof bolt, nut is characterized in that: the angle a of helical teeth and bolt shaft axis is between 0 °-20 °.
The utility model beneficial effect compared with prior art:
1, the utility model with special tool tighten fixing after, if part or member take place can still with special tool it further be tightened up when loosening;
2, because of on bolt, nut foundation outline conical surface, be provided with cross section indentation helical teeth, owing to only be provided with the Point of Strength that screws direction on the helical teeth, do not screw out the Point of Strength of direction, not only the conventional manual instrument can't be with this screw, dismounting that nut is complete, and be exactly to use the utility model special tool, also can't be with this bolt, nut dismounting;
3, owing to be provided with locking tooth in the bottom surface that screw head, nut and workpiece match, locking tooth after fastening will be meshed with the workpiece surface of contact tightly, ratchet as ratchet is stuck on the surface of workpiece firmly, has further strengthened anti-theft capability of the present utility model.
Description of drawings:
Fig. 1 is bolt, nut assembly structure figure; Fig. 2 is that D among Fig. 1 is to view;
Fig. 3 is that C-C among Fig. 1 is to view.
Among the figure: 1. screw head, 2. screw rod, 3. nut, 4. helical teeth, 5. locking tooth.
Embodiment:
Describe the utility model in detail below in conjunction with accompanying drawing:
As Figure 1-3, a kind of passive type theftproof bolt, nut, comprise screw head 1, screw rod 2, nut 3, its structural feature is that the foundation outline face of screw head 1, nut 3 is set to conical surface, be provided with 4-12 helical teeth 4 on the conical surface of screw head 1, nut 3, the angle a of helical teeth 4 and bolt shaft axis is between 0 °-20 °.Present embodiment is provided with 8 helical teeth 4, and helical teeth 4 is 15 ° with the angle a of bolt shaft axis; Be provided with locking tooth 5, the cross section indentation of helical teeth 4, locking tooth 5 at screw head 1, nut 3 with the bottom surface that workpiece matches.One flank of tooth of flexuose helical teeth 4, locking tooth 5 is straight wall, and is perpendicular with the tooth root bottom surface, and straight wall is arranged on the precession direction, and described precession direction is clockwise.
During installation, with special sleeve special tool, in special sleeve, be provided with the model cavity that matches with screw head 1 or nut 3 profiles, special jacket casing is on screw head 1 or nut 3, the straight wall of the model cavity sawtooth in the sleeve is stuck on the straight wall of sawtooth on screw head 1 or the nut 3, sleeve can only drive screw head 1 or nut 3 screws the direction rotation, thereby nut 3 is tightened.When nut 3 is tightened, be located at the match hock point of locking tooth 5 of bottom surface of screw head 1, nut 3 and workpiece and firmly be stuck on the associated workpiece surface as the ratchet of ratchet.If will rotate to screwing out direction, because indentation helical teeth 4 does not have to the Point of Strength that screws out direction, sleeve only can be along skidding off on helical teeth 4 bottom surfaces on screw head 1 or nut 3 conical surfaces.Bolt, nut are permanent service time, become flexible as part or member take place, and need further tighten up, and operate getting final product with special tool; Unscrew or dismantle with other instrument commonly used, owing to do not have Point of Strength on screw head 1 or the nut 3, wrench or pliers can't screw out nut 3, therefore have good anti-theft effect.
Claims (2)
1. a passive type theftproof bolt, nut, comprise screw head (1), screw rod (2), nut (3), it is characterized in that: the foundation outline face of screw head (1), nut (3) is set to conical surface, is provided with 4-12 helical teeth (4) on the conical surface of screw head (1), nut (3); Be provided with locking tooth (5) at screw head (1), nut (3) with the bottom surface that workpiece matches; The cross section indentation of helical teeth (4), locking tooth (5).
2. a kind of passive type theftproof bolt according to claim 1, nut is characterized in that: the angle a of helical teeth (4) and bolt shaft axis is between 0 °-20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201239430U CN201666302U (en) | 2010-02-02 | 2010-02-02 | Passive theftproof bolt and nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201239430U CN201666302U (en) | 2010-02-02 | 2010-02-02 | Passive theftproof bolt and nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201666302U true CN201666302U (en) | 2010-12-08 |
Family
ID=43267262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201239430U Expired - Fee Related CN201666302U (en) | 2010-02-02 | 2010-02-02 | Passive theftproof bolt and nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201666302U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU176532U1 (en) * | 2017-06-14 | 2018-01-22 | Диана Анатольевна Ерцкина | ANTI-VANDAL THREADED CONNECTION |
| RU2685267C1 (en) * | 2018-03-12 | 2019-04-17 | Диана Анатольевна Ерцкина | Method of mounting and dismantling anti-vandal threaded connection |
-
2010
- 2010-02-02 CN CN2010201239430U patent/CN201666302U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU176532U1 (en) * | 2017-06-14 | 2018-01-22 | Диана Анатольевна Ерцкина | ANTI-VANDAL THREADED CONNECTION |
| RU2685267C1 (en) * | 2018-03-12 | 2019-04-17 | Диана Анатольевна Ерцкина | Method of mounting and dismantling anti-vandal threaded connection |
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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: 20101208 Termination date: 20140202 |