CN204477020U - A kind of hex head bolt - Google Patents
A kind of hex head bolt Download PDFInfo
- Publication number
- CN204477020U CN204477020U CN201520074617.8U CN201520074617U CN204477020U CN 204477020 U CN204477020 U CN 204477020U CN 201520074617 U CN201520074617 U CN 201520074617U CN 204477020 U CN204477020 U CN 204477020U
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- CN
- China
- Prior art keywords
- head
- bolt
- hexagonal
- height
- tapped hole
- 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 discloses a kind of hex head bolt, comprise head and screw part, it is characterized in that: head is made up of with second head first head of split, the height of first head is greater than the height of second head, first head has outer-hexagonal, and the lower end surface of first head is provided with tapped hole, and the upper-end surface of second head is provided with screw body, first head is threaded with screw body by tapped hole, and the height of screw body is less than the degree of depth of tapped hole.The utility model can screw when being fastenedly connected but not easily unclamp, can be effectively antitheft, is applicable to the fastening installation of public place facility.
Description
Technical field
The utility model relates to a kind of Fastener products, what be specifically related to is a kind of hex head bolt.
Background technique
Hex head bolt refers to the fastening piece be made up of hexagon-head and screw rod, and its use is the most extensive.Hex head bolt is when fastening installation, spanner be hexagon head by turning bolt carry out bolt screw with unclamp operation, because hexagon head, screw rod are the structures of disjunctor, so forward turn bolt hexagon head produce fastening force and oppositely turn bolt hexagon head generation release force be substantially identical, namely can screw up with a wrench bolt, also can unclamp bolt with same spanner.So, utilize existing hex head bolt in public places after fastening installation communal facility, for avoiding facility stolen, generally will adopt the method destroying bolt thread, not only working unnecessary, and the screw thread dismounting that is destroyed rear above-mentioned facility just seems and bothers very much.
Summary of the invention
In view of current known technology Problems existing, the technical problems to be solved in the utility model is that providing a kind of can screw when being fastenedly connected but not easily unclamp, can be effectively antitheft, is applicable to the hex head bolt of the fastening installation of public place facility.
The utility model is implemented by the following technical programs:
A kind of hex head bolt, comprise head and screw part, it is characterized in that: head is made up of with second head first head of split, the height of first head is greater than the height of second head, first head has outer-hexagonal, and the lower end surface of first head is provided with tapped hole, and the upper-end surface of second head is provided with screw body, first head is threaded with screw body by tapped hole, and the height of screw body is less than the degree of depth of tapped hole.
After adopting technique scheme, the utility model can realize can screwing when being fastenedly connected but not easily unclamping, working principle is: when screwing hex head bolt, first head of bolt clamped by spanner, first first head of bolt and second head can be made after rotating forward spanner mutually to tighten, and then whole bolt is tightened by action together; If need to unclamp after the fastened installation of bolt, spanner is clamped first head of bolt equally and is rotated backward, and first head of bolt and second head at this moment can only be made to occur getting loose, and bolt can not be released; And if spanner clamped second head of bolt and rotate backward that (second head here refers to also has outer-hexagonal, if not then do not know where to begin), due to the height of second head (this highly can design according to particular requirement) less than normal, spanner is bad stressed, so bolt can not be released, because bolt not easily unclamps after screwing, so effective anti-theft function can be played, be applicable to the fastening installation of public place facility.When really will dismantle to above-mentioned facility, special key can be adopted to be unclamped, or directly the upper head portion of bolt is welded and fixed, then be unclamped by common wrench.
As preferably, second head has the outer-hexagonal with first head same size and shape.Object is when fastening force is less, can clamp second head unclamp bolt by spanner.
As preferably, second head has the outer-hexagonal being greater than first head sizes, and the opposite side distance of second head outer-hexagonal is from the diagonal distance being more than or equal to first head outer-hexagonal.Object is when fastening force is less, can clamp second head unclamp bolt by spanner, and the area of second head is comparatively large simultaneously, plays the effect of pad.
Accompanying drawing explanation
The utility model has following accompanying drawing:
Fig. 1 is the structural representation of the first embodiment of the utility model,
Fig. 2 is the structural representation of the utility model the second embodiment.
Embodiment
As shown in Figure 1, hex head bolt of the present utility model, comprise head and screw part 3, head is made up of with second head 2 first head 1 of split, the height of first head 1 is greater than the height of second head 2, first head 1 has outer-hexagonal, the lower end surface of first head 1 is provided with tapped hole 4, the upper-end surface of second head 2 is provided with screw body 5, first head 1 is threaded with screw body 5 by tapped hole 4, the height of screw body 5 is less than the degree of depth of tapped hole 4, and second head 2 has the outer-hexagonal with first head 1 same size and shape.
As shown in Figure 2, hex head bolt of the present utility model, comprise head and screw part 3, head is made up of with second head 2 first head 1 of split, the height of first head 1 is greater than the height of second head 2, first head 1 has outer-hexagonal, the lower end surface of first head 1 is provided with tapped hole 4, the upper-end surface of second head 2 is provided with screw body 5, first head 1 is threaded with screw body 5 by tapped hole 4, the height of screw body 5 is less than the degree of depth of tapped hole 4, second head 2 has the outer-hexagonal being greater than first head 1 size, the opposite side distance of second head 2 outer-hexagonal is from the diagonal distance being greater than (also can equal) first head 1 outer-hexagonal.
Claims (3)
1. a hex head bolt, comprise head and screw part, it is characterized in that: head is made up of with second head first head of split, the height of first head is greater than the height of second head, first head has outer-hexagonal, and the lower end surface of first head is provided with tapped hole, and the upper-end surface of second head is provided with screw body, first head is threaded with screw body by tapped hole, and the height of screw body is less than the degree of depth of tapped hole.
2. a kind of hex head bolt as claimed in claim 1, is characterized in that: second head has the outer-hexagonal with first head same size and shape.
3. a kind of hex head bolt as claimed in claim 1, is characterized in that: second head has the outer-hexagonal being greater than first head sizes, the opposite side distance of second head outer-hexagonal is from the diagonal distance being more than or equal to first head outer-hexagonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520074617.8U CN204477020U (en) | 2015-02-03 | 2015-02-03 | A kind of hex head bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520074617.8U CN204477020U (en) | 2015-02-03 | 2015-02-03 | A kind of hex head bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204477020U true CN204477020U (en) | 2015-07-15 |
Family
ID=53632811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520074617.8U Expired - Fee Related CN204477020U (en) | 2015-02-03 | 2015-02-03 | A kind of hex head bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204477020U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114429A (en) * | 2015-08-31 | 2015-12-02 | 邓永辉 | Detachable screw |
| CN110332202A (en) * | 2019-07-03 | 2019-10-15 | 浙江瑞博汽车部件有限公司 | Automatic control fastening force screw |
-
2015
- 2015-02-03 CN CN201520074617.8U patent/CN204477020U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114429A (en) * | 2015-08-31 | 2015-12-02 | 邓永辉 | Detachable screw |
| CN110332202A (en) * | 2019-07-03 | 2019-10-15 | 浙江瑞博汽车部件有限公司 | Automatic control fastening force screw |
| CN110332202B (en) * | 2019-07-03 | 2024-06-07 | 浙江瑞博汽车部件有限公司 | Self-control fastening force screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20160203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |