CN203051367U - Safety bolt - Google Patents
Safety bolt Download PDFInfo
- Publication number
- CN203051367U CN203051367U CN 201320078848 CN201320078848U CN203051367U CN 203051367 U CN203051367 U CN 203051367U CN 201320078848 CN201320078848 CN 201320078848 CN 201320078848 U CN201320078848 U CN 201320078848U CN 203051367 U CN203051367 U CN 203051367U
- Authority
- CN
- China
- Prior art keywords
- screw rod
- bolt
- head
- degree
- angle
- 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 - Lifetime
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- Train Traffic Observation, Control, And Security (AREA)
Abstract
The utility model provides a safety bolt, which comprises a first screw rod, a second screw rod, a third screw rod and a head which are sequentially connected and have diameters which are sequentially increased. Strip bulges are circumferentially and evenly distributed along an axis on the outer circumferential surface of the first screw rod. A male thread is arranged on the second screw rod. The head is round and the end surface of the head is provided with an operating groove. The first screw rod, the second screw rod and the third screw rod are transitioned through inclined surfaces. Since the screw rods are transitioned through the inclined surfaces, the strip bulges are arranged on the outer circumferential surface of the first screw rod, the head of the bolt is round, and the operating groove is square, the safety bolt provided by the utility model has the beneficial effects that the structure is simple, strength is high, the safety bolt is convenient to install and position, the safety bolt can be unscrewed only by using a special tool, the safety bolt is not apt to be stolen, a safety factor is high, and the safety of a device which needs to be tightened is greatly improved.
Description
Technical field
The utility model relates to a kind of bolt, particularly a kind of breaker bolt.
Background technique
Bolt belongs to fastening piece, has bolt in each field substantially.Traditional bolt is made up of threaded body and head, and the location is very inconvenient during installation, twists askew bolt easily, cause thread damage, and intensity is not high; Traditional bolt head is hexagon or interior hexagonal form, is prized easily, and is very dangerous.
The model utility content
(1) technical problem that will solve
The technical problems to be solved in the utility model provides that a kind of simple in structure, intensity is big, that the location is installed is convenient and be difficult for stolen breaker bolt.
(2) technological scheme
For solving the problems of the technologies described above, the utility model provides a kind of breaker bolt, comprise successively and to link to each other and first screw rod 1, second screw rod 2, the 3rd screw rod 3 and head 4 that diameter increases successively, described first screw rod, 1 periphery upper edge axis circumferentially is evenly equipped with strip projected parts, described second screw rod 2 is provided with outside thread, rounded and the end face of described head 4 is provided with operating groove 41, passes through chamfered transition between described first screw rod 1, second screw rod 2 and the 3rd screw rod 3.
Further, the cross section of described strip projected parts is triangle or trapezoidal.
Further, there are the first angle a in inclined-plane and axis between described first screw rod 1 and second screw rod 2, and the described first angle a is more than or equal to 30 degree and smaller or equal to 60 degree.
Further, there are the second angle b in inclined-plane and axis between described second screw rod 2 and the 3rd screw rod 3, and the described first angle b is more than or equal to 30 degree and smaller or equal to 60 degree.
Further, the described first angle a is 35 degree.
Further, the described second angle b is 50 degree.
Further, described operating groove 41 cross sections are square.
Further, described first screw rod, 1 end edge chamfering.
(3) beneficial effect
The utility model breaker bolt, between each screw rod by chamfered transition, and be provided with strip bulge at the first screw rod periphery, bolt head is that circle and operating groove are square, simple in structure, intensity is big, it is convenient that the location is installed, and needs just can turn on the instrument of special use, therefore is difficult for stolen, the safety coefficient height has improved the Security that needs securing means greatly.
Description of drawings
Fig. 1 is the structural representation of the utility model breaker bolt;
Fig. 2 is the sectional view of the utility model breaker bolt.
Embodiment
Consult Fig. 1 ~ Fig. 2, the utility model provides a kind of breaker bolt, comprise first screw rod 1 that links to each other successively, second screw rod 2, the 3rd screw rod 3 and head 4, first screw rod 1, second screw rod 2, the cross section of the 3rd screw rod 3 and head 4 is that circle and diameter increase successively, first screw rod, 1 periphery upper edge axis circumferentially is evenly equipped with strip projected parts, the cross section of strip projected parts is triangle or trapezoidal, described first screw rod, 1 end edge chamfering, second screw rod 2 is provided with outside thread, rounded and the end face of head 4 is provided with operating groove 41, this operating groove 41 is square, needs to turn on first screw rod 1 with special tool, pass through chamfered transition between second screw rod 2 and the 3rd screw rod 3; There are the first angle a in inclined-plane and axis between first screw rod 1 and second screw rod 2, and this first angle a is more than or equal to 30 degree and smaller or equal to 60 degree, and preferably 35 spend; There are the second angle b in inclined-plane and axis between second screw rod 2 and the 3rd screw rod 3, and the first angle b is more than or equal to 30 degree and smaller or equal to 60 degree, and preferably 50 spend.In the middle of bolt, be provided with manhole 5, can be used on some ventilative equipment or conveniently add wet goods.
The utility model breaker bolt, between each screw rod by chamfered transition, and be provided with strip bulge at the first screw rod periphery, bolt head is that circle and operating groove are square, simple in structure, intensity is big, it is convenient that the location is installed, and needs just can turn on the instrument of special use, therefore is difficult for stolen, the safety coefficient height has improved the Security that needs securing means greatly.
The above only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. breaker bolt, it is characterized in that: comprise successively linking to each other and first screw rod (1), second screw rod (2), the 3rd screw rod (3) and head (4) that diameter increases successively, described first screw rod (1) periphery upper edge axis circumferentially is evenly equipped with strip projected parts, described second screw rod (2) is provided with outside thread, rounded and the end face of described head (4) is provided with operating groove (41), passes through chamfered transition between described first screw rod (1), second screw rod (2) and the 3rd screw rod (3).
2. breaker bolt as claimed in claim 1, it is characterized in that: the cross section of described strip projected parts is triangle or trapezoidal.
3. breaker bolt as claimed in claim 1, it is characterized in that: there are first angle (a) in inclined-plane and axis between described first screw rod (1) and second screw rod (2), and described first angle (a) is more than or equal to 30 degree and smaller or equal to 60 degree.
4. breaker bolt as claimed in claim 1, it is characterized in that: there are second angle (b) in inclined-plane and axis between described second screw rod (2) and the 3rd screw rod (3), and described first angle (b) is more than or equal to 30 degree and smaller or equal to 60 degree.
5. breaker bolt as claimed in claim 3 is characterized in that: described first angle (a) is 35 degree.
6. breaker bolt as claimed in claim 4 is characterized in that: described second angle (b) is 50 degree.
7. breaker bolt as claimed in claim 1 is characterized in that: described operating groove (41) cross section is square.
8. breaker bolt as claimed in claim 1 is characterized in that: described first screw rod (1) end edge chamfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320078848 CN203051367U (en) | 2013-02-20 | 2013-02-20 | Safety bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320078848 CN203051367U (en) | 2013-02-20 | 2013-02-20 | Safety bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203051367U true CN203051367U (en) | 2013-07-10 |
Family
ID=48734325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320078848 Expired - Lifetime CN203051367U (en) | 2013-02-20 | 2013-02-20 | Safety bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203051367U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953234A (en) * | 2019-12-18 | 2020-04-03 | 惠州卓越紧固系统有限公司 | Triangular threaded screw and design method |
-
2013
- 2013-02-20 CN CN 201320078848 patent/CN203051367U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953234A (en) * | 2019-12-18 | 2020-04-03 | 惠州卓越紧固系统有限公司 | Triangular threaded screw and design method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |
|
| CX01 | Expiry of patent term |