CN203308859U - Anti-theft bolt and special wrench - Google Patents
Anti-theft bolt and special wrench Download PDFInfo
- Publication number
- CN203308859U CN203308859U CN2013202756921U CN201320275692U CN203308859U CN 203308859 U CN203308859 U CN 203308859U CN 2013202756921 U CN2013202756921 U CN 2013202756921U CN 201320275692 U CN201320275692 U CN 201320275692U CN 203308859 U CN203308859 U CN 203308859U
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- nut
- hole
- theft bolt
- external diameter
- holding part
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Abstract
An anti-theft bolt comprises a nut and a screw, wherein the nut and the screw are integrally formed. The nut is of a circular truncated cone shape, the top of the nut is provided with a round hole extending along the axis, the inner wall of the round hole is provided with at least two blind holes in the radial direction of the round hole, and one side, close to the top face of the nut, of the inner side of each blind hole is connected with the inner wall of the round hole through a smooth arc face. Besides, the utility model provides a special wrench for screwing the anti-theft bolt. According to the anti-theft bolt and the special wrench, the nut is of the circular truncated cone shape, so that a common wrench can not clamp the nut or screw the nut, the round hole in the top of the nut cannot be clamped, the nut can be screwed only through the practice that the special wrench extends into the round hole and is clamped in the blind holes, and therefore the anti-theft performance is good. One side, close to the top face of the nut, of the inner wall of each blind hole is connected with the inner wall of the round hole through one smooth arc face, so that extending and pulling of the special wrench are facilitated, and the stress faces of the special wrench and the inner walls of the blind holes are not influenced when the special wrench is screwed.
Description
Technical field
The utility model relates to bolt and manufactures field, particularly relates to a kind of anti-theft bolt and special spanner.
Background technique
Bolt is a kind of link commonly used and fastening piece.The nut of traditional bolt is generally outer-hexagonal or interior hexagonal structure, and this kind structure just can screw flexibly by general Wrench, is convenient to dismounting or installs.But, exactly because easily screwing of conventional bolt makes the stolen of some costlinesses and safety guarantee equipment, such as, power equipment, railway equipment etc., produced huge economy and damaged and potential safety hazard.
The model utility content
Based on this, be necessary easily to screw and the stolen problem of equipment that causes for traditional bolt, provide a kind of for antitheft anti-theft bolt and special spanner.
A kind of anti-theft bolt, comprise nut and screw rod, described nut and described screw rod are one-body molded, described nut is round table-like and end face and offers the circular hole along Axis Extension, described circular-hole internal-wall is along described Circular Aperture at least two blind holes are set, and the side that described blind hole inwall closes on described nut end face is connected with level and smooth cambered surface with described circular-hole internal-wall.
In embodiment, the side of described nut is the level and smooth curved surface of evagination therein.
In embodiment, described circular hole is inner to be connected with level and smooth curved surface with the end face of described nut therein.
In embodiment, also comprise the hole cap therein, an end of described hole cap is columnar portion, the other end is brim part, described columnar portion and described brim part are one-body molded, and the external diameter of described brim part is greater than the external diameter of described columnar portion, and the external diameter of described columnar portion is less than the internal diameter of described circular hole.
A kind of special spanner, for screwing anti-theft bolt described above, described special spanner comprise holding part and with the described holding part section that screws connected vertically, the described external diameter that screws section is less than the internal diameter of described circular hole, the described section that screws has through hole away from an end of described holding part, two holders are set in described through hole, described two holders stretch out respectively two openings of described through hole, the external diameter that described holder stretches out the outer part of described opening is less than the internal diameter of described blind hole, is connected with spring between described two holders.
Therein in embodiment, the inwall of described through hole offers the passage that is communicated to the outside, described holding part, in described passage, be provided with bracing wire, the one end minute twice of described bracing wire are connected to respectively two ends of described spring, and the other end extends to the outside of described holding part and connects draw ring along described passage.
Above-mentioned anti-theft bolt and special spanner, nut are that round table-like, common spanner can't hold, more can't screw, the circular hole at nut top does not have the condition held yet, and only can stretch in circular hole and be fastened in blind hole by special spanner just can screw, and has anti-theft effect preferably.The side that the blind hole inwall closes on the nut end face is connected with level and smooth cambered surface with circular-hole internal-wall, is convenient to stretching into and extracting of special spanner, and can not affect the stress surface of special spanner and blind hole inwall when screwing special spanner.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment's anti-theft bolt;
Fig. 2 is the schematic diagram of an embodiment's special spanner.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
As shown in Figures 1 and 2, in one embodiment, a kind of anti-theft bolt, comprise nut 110 and screw rod 120.Nut 110 is one-body molded with screw rod 120, nut 110 is round table-like and end face and offers the circular hole 112 along Axis Extension, circular hole 112 inwalls radially arrange at least two blind holes 114 along circular hole 112, and the side that blind hole 114 inwalls close on nut 110 end faces is connected with level and smooth cambered surface with circular hole 112 inwalls.The side of nut 110 is the level and smooth curved surface of evagination.Circular hole 112 is inner to be connected with level and smooth curved surface with the end face of nut 110.
Above-mentioned anti-theft bolt, nut 110 are that round table-like, common spanner can't hold, more can't screw, the circular hole 112 at nut top does not have the condition held yet, and only can stretch in circular hole 112 and be fastened in that blind hole 114 is interior just can screw by special spanner, has anti-theft effect preferably.The side that blind hole 114 inwalls close on nut 110 end faces is connected with level and smooth cambered surface with circular hole 112 inwalls, is convenient to stretching into and extracting of special spanner, and can not affect the stress surface of special spanner and blind hole 114 inwalls when screwing special spanner.
In specific embodiment, anti-theft bolt also comprises hole cap 130, and an end of hole cap 130 is columnar portion, and the other end is brim part, and columnar portion and brim part are one-body molded, and the external diameter of brim part is greater than the external diameter of columnar portion, and the external diameter of columnar portion is less than the internal diameter of circular hole 112.
A kind of special spanner, be used to screwing above-mentioned anti-theft bolt, this special spanner comprise holding part 210 and with holding part 210 section 220 that screws connected vertically.The external diameter that screws section 220 is less than the internal diameter of circular hole 112, screws section 220 and has through hole 222 away from an end of holding part 210.Interior 224, two holders 224 of two holders that arrange of through hole 222 stretch out respectively 222 two openings of through hole, and the external diameter that holder 224 stretches out the outer part of opening is less than the internal diameter of blind hole 114, is connected with spring 226 between two holders 224.
In specific embodiment, the inwall of through hole 222 offers the passage that is communicated to 210 outsides, holding part, in passage, be provided with bracing wire 230, an end minute twice of bracing wire 230 are connected to respectively two ends of spring 226, and the other end extends to the outside of holding part 210 and connects draw ring along passage.
The above embodiment has only expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (6)
1. anti-theft bolt, it is characterized in that, comprise nut and screw rod, described nut and described screw rod are one-body molded, described nut is round table-like and end face and offers the circular hole along Axis Extension, described circular-hole internal-wall is along described Circular Aperture at least two blind holes are set, and the side that described blind hole inwall closes on described nut end face is connected with level and smooth cambered surface with described circular-hole internal-wall.
2. anti-theft bolt according to claim 1, is characterized in that, the side of described nut is the level and smooth curved surface of evagination.
3. anti-theft bolt according to claim 1, is characterized in that, described circular hole is inner to be connected with level and smooth curved surface with the end face of described nut.
4. anti-theft bolt according to claim 1, it is characterized in that, also comprise the hole cap, one end of described hole cap is columnar portion, the other end is brim part, described columnar portion and described brim part are one-body molded, and the external diameter of described brim part is greater than the external diameter of described columnar portion, and the external diameter of described columnar portion is less than the internal diameter of described circular hole.
5. special spanner, for screwing the anti-theft bolt described in one of claim 1 to 4, it is characterized in that, described special spanner comprise holding part and with the described holding part section that screws connected vertically, the described external diameter that screws section is less than the internal diameter of described circular hole, the described section that screws has through hole away from an end of described holding part, two holders are set in described through hole, described two holders stretch out respectively two openings of described through hole, the external diameter that described holder stretches out the outer part of described opening is less than the internal diameter of described blind hole, between described two holders, be connected with spring.
6. special spanner according to claim 1, it is characterized in that, the inwall of described through hole offers the passage that is communicated to the outside, described holding part, in described passage, be provided with bracing wire, the one end minute twice of described bracing wire are connected to respectively two ends of described spring, and the other end extends to the outside of described holding part and connects draw ring along described passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202756921U CN203308859U (en) | 2013-05-17 | 2013-05-17 | Anti-theft bolt and special wrench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202756921U CN203308859U (en) | 2013-05-17 | 2013-05-17 | Anti-theft bolt and special wrench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203308859U true CN203308859U (en) | 2013-11-27 |
Family
ID=49615072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202756921U Expired - Fee Related CN203308859U (en) | 2013-05-17 | 2013-05-17 | Anti-theft bolt and special wrench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203308859U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018176437A1 (en) * | 2017-04-01 | 2018-10-04 | 华健 | Bolt and dedicated sleeve structure matching same |
| CN110645339A (en) * | 2019-09-16 | 2020-01-03 | 杭州杰途传动部件有限公司 | Integral oil distributor |
| CN110685989A (en) * | 2019-10-12 | 2020-01-14 | 嘉兴震辰五金科技股份有限公司 | Round-head washer cross drill tail screw |
| CN110685988A (en) * | 2019-10-12 | 2020-01-14 | 嘉兴震辰五金科技股份有限公司 | Split type countersunk cross self-drilling screw |
-
2013
- 2013-05-17 CN CN2013202756921U patent/CN203308859U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018176437A1 (en) * | 2017-04-01 | 2018-10-04 | 华健 | Bolt and dedicated sleeve structure matching same |
| CN110645339A (en) * | 2019-09-16 | 2020-01-03 | 杭州杰途传动部件有限公司 | Integral oil distributor |
| CN110645339B (en) * | 2019-09-16 | 2021-07-16 | 杭州杰途传动部件有限公司 | Integral oil distributor |
| CN110685989A (en) * | 2019-10-12 | 2020-01-14 | 嘉兴震辰五金科技股份有限公司 | Round-head washer cross drill tail screw |
| CN110685988A (en) * | 2019-10-12 | 2020-01-14 | 嘉兴震辰五金科技股份有限公司 | Split type countersunk cross self-drilling screw |
| CN110685989B (en) * | 2019-10-12 | 2021-08-03 | 嘉兴震辰五金科技股份有限公司 | Round-head washer cross drill tail screw |
| CN110685988B (en) * | 2019-10-12 | 2021-08-03 | 嘉兴震辰五金科技股份有限公司 | Split type countersunk cross self-drilling screw |
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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: 20131127 Termination date: 20140517 |