CN214196898U - Constant-torque bolt - Google Patents
Constant-torque bolt Download PDFInfo
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- CN214196898U CN214196898U CN202022066050.3U CN202022066050U CN214196898U CN 214196898 U CN214196898 U CN 214196898U CN 202022066050 U CN202022066050 U CN 202022066050U CN 214196898 U CN214196898 U CN 214196898U
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- nut
- vertical tangent
- constant torque
- torque bolt
- screw rod
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Abstract
The utility model provides a constant torque bolt, the electric iron comprises a screw rod, first nut, the second nut, the breakable structure, first nut sets up at the screw rod tip, the second nut is through breakable structure and first nut coaxial coupling, first nut is different with the structure of second nut, make it need adopt different instrument to operate, the cylinder of first nut for having three vertical tangent plane, the contained angle of three vertical tangent plane circumference equidistance distribution and two adjacent vertical tangent planes is 60 degrees, interval distribution forms the arc surface between two adjacent vertical tangent planes, because first nut is the dysmorphism structure, need adopt special-shaped assembly and disassembly tools just can operate, can restrict illegal dismouting like this, like the illegal overlap joint operation of kilowatt-hour meter, prevent the action of stealing electricity.
Description
Technical Field
The utility model relates to a permanent moment of torsion bolt.
Background
In the process of connecting the power lead, the bolt is widely used for conducting connection, and the lead and the conductor are tightly pressed through the front end of the bolt. During the process of connecting the conducting wire by using the bolt, the screwing torque of the bolt is not too large or too small. The torque is too small, the contact is unreliable, and the connection part is easy to generate heat and even cause electrical fire. If the torque is too large, the lead and the connection terminal are easily broken, and also an electrical failure is easily caused.
In addition, in the connection of the power conductors, many scenes relate to the measurement of electric energy, so that the connection of the conductors is required to have the function of limiting illegal lapping, and the actions of electricity stealing and the like can be realized by preventing simple operation.
Disclosure of Invention
The utility model aims at providing a can restrict the permanent moment of torsion bolt of illegal dismouting to prior art not enough.
The purpose of the utility model is realized through the following technical scheme:
a constant torque bolt is characterized in that: including the screw rod, first nut, the second nut, the breakable structure, first nut sets up at the screw rod tip, and the second nut is through breakable structure and first nut coaxial coupling, and the structure of first nut and second nut is different, makes it need adopt different instruments to operate, and the cylinder of first nut for having three vertical tangent plane, the contained angle of three vertical tangent plane circumference equidistance distribution and two adjacent vertical tangent planes is 60 degrees, interval distribution formation arc surface between two adjacent vertical tangent planes.
And a regular hexagonal groove, a straight groove or a cross groove is formed on the top surface of the second screw cap.
The outer contour of the second nut is a regular hexagon.
The frangible structure has a frangible neck portion.
The screw rod, the first nut, the second nut and the easily-broken structure are integrally formed.
The easy-to-break structure comprises a positive conical section connected to the top surface of the first nut and an inverted conical section connected to the bottom surface of the second nut, wherein the positive conical section is coaxially connected with the inverted conical section and forms an easy-to-break necking part at the joint.
The screw, the first nut, the second nut and the breakable structure are coaxially distributed.
The utility model discloses following beneficial effect has:
the second nut passes through breakable structure and first nut coaxial coupling, it is rotatory to adopt conventional assembly and disassembly tools to operate the second nut to make the bolt rotatory during the operation, when the moment of torsion reaches the unable value that bears of breakable structure, breakable structure fracture, make the separation of second nut, just so can reach the effect of permanent moment of torsion, prevent that the bolt from being screwed up or too loose, and influence the electrically conductive connection of wire, in addition because first nut is special-shaped structure, need adopt special-shaped assembly and disassembly tools just can operate, can restrict illegal dismouting like this, like the illegal overlap joint operation of kilowatt-hour meter, prevent the action of stealing electricity.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of fig. 1.
FIG. 3 is an external view of the first nut.
Detailed Description
Referring to fig. 1 to 3, a constant torque bolt convenient to process, includes screw rod 1, first nut 2, second nut 3, breakable structure 4, first nut 2 sets up at screw rod 1 tip, second nut 3 is connected with first nut 2 through breakable structure 4, screw rod 1, first nut 2, second nut 3 and breakable structure 4 integrated into one piece and coaxial arrangement, first nut 2 is different with second nut 3's structure, makes it need adopt different assembly and disassembly tools to operate.
The top surface of the second nut 3 is formed with a regular hexagonal groove 31, which can be operated by a conventional dismounting tool, or the top surface of the second nut 3 can be provided with a straight groove or a cross groove as required, or the outer contour of the second nut 3 can be designed into a regular hexagonal shape or other shapes that can be operated by a conventional dismounting tool.
The breakable structure 4 comprises a normal conical section 43 connected to the top surface of the first nut 2 and an inverted conical section 41 connected to the bottom surface of the second nut 3, the normal conical section 43 and the inverted conical section 41 are coaxially connected and form a breakable necking part 42 at the joint, and when the torque reaches a certain value, the breakable structure 4 is broken from the necking part 42, so that the second nut 3 falls off.
During operation, the second nut 3 is operated by a conventional dismounting tool to rotate so that the bolt rotates in the screw hole, when the torque reaches a value which cannot be borne by the breakable structure 4, the breakable structure 4 is broken to separate the second nut 3, when the bolt needs to be dismounted, the bolt can be withdrawn from the screw hole only by operating the first nut 2 to rotate by a special-shaped dismounting tool, so that illegal dismounting can be limited, such as illegal lap joint operation of a watt-hour meter, and electricity stealing behavior is prevented.
The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited thereby, and all equivalent changes and modifications made within the scope of the claims and the specification should be considered within the scope of the present invention.
Claims (7)
1. A constant torque bolt is characterized in that: including the screw rod, first nut, the second nut, the breakable structure, first nut sets up at the screw rod tip, and the second nut is through breakable structure and first nut coaxial coupling, and the structure of first nut and second nut is different, makes it need adopt different instruments to operate, and the cylinder of first nut for having three vertical tangent plane, the contained angle of three vertical tangent plane circumference equidistance distribution and two adjacent vertical tangent planes is 60 degrees, interval distribution formation arc surface between two adjacent vertical tangent planes.
2. A constant torque bolt according to claim 1, wherein: and a regular hexagonal groove, a straight groove or a cross groove is formed on the top surface of the second screw cap.
3. A constant torque bolt according to claim 1, wherein: the outer contour of the second nut is a regular hexagon.
4. A constant torque bolt according to claim 1 or 2 or 3, wherein: the frangible structure has a frangible neck portion.
5. A constant torque bolt according to claim 1 or 2 or 3, wherein: the screw rod, the first nut, the second nut and the easily-broken structure are integrally formed.
6. A constant torque bolt according to claim 1 or 2 or 3, wherein: the easy-to-break structure comprises a positive conical section connected to the top surface of the first nut and an inverted conical section connected to the bottom surface of the second nut, wherein the positive conical section is coaxially connected with the inverted conical section and forms an easy-to-break necking part at the joint.
7. A constant torque bolt according to claim 1 or 2 or 3, wherein: the screw, the first nut, the second nut and the breakable structure are coaxially distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022066050.3U CN214196898U (en) | 2020-09-18 | 2020-09-18 | Constant-torque bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022066050.3U CN214196898U (en) | 2020-09-18 | 2020-09-18 | Constant-torque bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214196898U true CN214196898U (en) | 2021-09-14 |
Family
ID=77629180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022066050.3U Active CN214196898U (en) | 2020-09-18 | 2020-09-18 | Constant-torque bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214196898U (en) |
-
2020
- 2020-09-18 CN CN202022066050.3U patent/CN214196898U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |