CN217029568U - Torsional shear type high-strength bolt for steel structure - Google Patents
Torsional shear type high-strength bolt for steel structure Download PDFInfo
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- CN217029568U CN217029568U CN202123157734.5U CN202123157734U CN217029568U CN 217029568 U CN217029568 U CN 217029568U CN 202123157734 U CN202123157734 U CN 202123157734U CN 217029568 U CN217029568 U CN 217029568U
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Abstract
The utility model discloses a torsional shear type high-strength bolt for a steel structure, which comprises a screw rod, wherein a bolt head is arranged at the top of the screw rod, a wrenching head is arranged at the bottom of the screw rod, a thread is arranged at one end of the screw rod, which is close to the wrenching head, and a groove is arranged at one end of the screw rod, which is close to the bolt head; a cutting groove is arranged between the screw rod and the wrenching head, the cutting groove is of an inward concave isosceles trapezoid structure, the diameter of the cutting groove is 0.5mm-2mm, and the angle formed by two sides of the cutting groove is 50-60 degrees. This bolt is through the groove footpath size of cutting of increase bolt product for the nut product in connecting the pair need not carry out surface treatment technology just can make the vice fastening shaft power value of steel construction torsional shear bolted connection qualified, and the nut need not do the bonderizing technology, just can make fastening shaft power detect qualified, has lacked one process, has practiced thrift the cost, also can shorten to customer's delivery period, improves economic benefits.
Description
Technical Field
The utility model relates to the technical field of bolts, in particular to a torsional shear type high-strength bolt for a steel structure.
Background
The torsional shear type high-strength bolt connection pair for steel structure is mainly used for industrial and civil buildings, highways and railway bridges. Towers, pipeline supports, hoisting machinery and other occasions requiring torsion shear type high-strength bolt connection pairs adopting friction type connection. It is characterized in that the tail end of the bolt is provided with a dodecagonal body. When the nut is installed, a special electric wrench is needed, two sleeve heads are arranged on the upper portion and the lower portion of the special electric wrench, one sleeve head is sleeved on a hexagon body of the nut, and the other sleeve head is sleeved on a dodecagonal body of the bolt. When the screw is screwed down, clockwise moment is applied to the nut, anticlockwise moment with the same magnitude is applied to the dodecagonal body of the bolt, the neck connected between the tail end of the bolt and the dodecagonal body bears torsional shear, and the installation is completed until the neck is sheared off. The torsional shear type high-strength bolt is a fastener which is used at a time and is generally not disassembled after being installed. The pretension force of the steel structure high-strength bolt is realized by screwing the nut. The pretension is usually controlled by using a torque method, a turning method or a twist-off bolt tail plum-blossom chuck method.
The existing torsional shear type high-strength bolt for the steel structure can not meet a large number of requirements of customers, the control on the size of the cutting groove diameter of a bolt product is very important in the production process, and the fastening shaft force value of the steel structure torsional shear bolt connecting pair can be qualified without carrying out a surface treatment process on a nut product in the connecting pair by increasing the size of the cutting groove diameter of the bolt product; in the prior art, in order to be matched with a bolt product, a nut product generally needs to be subjected to phosphating treatment so as to achieve a fastening shaft force value of a combination test, the process step greatly delays delivery time, time waste is caused, the cost is high, and the requirements of a production manufacturer and customers cannot be met at the same time.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a torsional shear type high-strength bolt for a steel structure.
In order to achieve the purpose, the utility model provides the following technical scheme: a torsional shear type high-strength bolt for a steel structure comprises a screw rod, wherein a bolt head is arranged at the top of the screw rod, a screwing head is arranged at the bottom of the screw rod, a thread is arranged at one end, close to the screwing head, of the screw rod, and a groove is formed at one end, close to the bolt head, of the screw rod; a cutting groove is arranged between the screw rod and the wrenching head, the cutting groove is of an inwards concave isosceles trapezoid structure, the diameter of the cutting groove is 0.5-2 mm, and the angle formed by two waists of the cutting groove is 50-60 degrees.
On the basis of the above scheme and as a preferable scheme of the scheme: the diameter of the cutting groove is 1 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the angle formed by the two waists of the cutting groove is 55 degrees.
On the basis of the above scheme and as a preferable scheme of the scheme: the bolt head is a round bolt head.
On the basis of the above scheme and as a preferable scheme of the scheme: the screw rod is made of low-carbon alloy steel.
The utility model has the following beneficial effects: compare current steel construction with turn round and cut type high strength bolt, this bolt is through the groove diameter size that cuts of increase bolt product for the nut product in the connection pair need not carry out surface treatment process and just can make the vice fastening axle power value of steel construction turn round and cut bolted connection qualified, and the nut need not do the bonderizing process, just can make fastening axle power detect qualified, has lacked one process, has practiced thrift the cost, also can shorten to customer's delivery phase, improves economic benefits.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of the grooving operation at the position A of the present invention.
Detailed Description
In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, however, the specific embodiments and embodiments described below are only for illustrative purposes and are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Referring to fig. 1 to 2 of the drawings, the torsional shear type high strength bolt for a steel structure in the present embodiment includes a screw rod 20, a bolt head 10 is disposed at the top of the screw rod 20, in the present embodiment, it is preferable that the bolt head 10 is a circular bolt head, a wrenching head 30 is disposed at the bottom of the screw rod 20, a thread 22 is disposed at one end of the screw rod 10 close to the wrenching head 30, and a groove 21 is disposed at one end of the screw rod 20 close to the bolt head 30; a cutting groove 40 is arranged between the screw rod 10 and the wrenching head 30, the cutting groove 40 is of an inward concave isosceles trapezoid structure, the cutting groove diameter 41 of the cutting groove 40 is 0.5mm-2mm, and the angle 42 formed by the two sides of the cutting groove 40 is 50-60 degrees. The groove 21 is formed in the outer surface of the screw rod 20, and the vibration load borne by the bolt is reduced and the load bearing performance of the bolt is improved through the arrangement of the groove 20; in this embodiment, during assembly, a connection pair is formed by a washer and a nut (not shown, the washer and the nut are regarded as prior art, and the assembly method is common knowledge in the art), a fixed workpiece is clamped between the bolt head 10 and the washer by the connection pair, and then the bolt is tightened by a special wrench, when the applied torque reaches a certain value, the wrenching head 30 is automatically unscrewed, that is, the required pre-tightening force is indicated, and the nut is tightened.
In a possible implementation manner, in the present embodiment, it is preferable that the cutting diameter 41 of the cutting groove 40 is 1mm, and the angle 42 formed by the two waists of the cutting groove 40 is 55 °; referring to fig. 2 of the drawings, the cutting groove diameter 41 is the shorter side of a group of parallel opposite sides of the isosceles trapezoid, and the fastening shaft force value of the steel structure torsional shear bolt connecting pair can be qualified without performing a surface treatment process on a nut product in the connecting pair by changing the size of the cutting groove diameter 41 and the angle 42 formed by the two sides of the cutting groove 40.
In one possible implementation, the screw 20 is made of a low carbon alloy steel. The low-carbon alloy steel has high structural strength and can bear high rotation torque, so that the strength of the bolt is high.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: equivalent changes made according to the structure, shape and principle of the utility model shall be covered by the protection scope of the utility model.
Claims (5)
1. The utility model provides a steel construction is with turning round type high strength bolt of cutting which characterized in that: the screw rod is provided with a bolt head at the top, a screwing head is arranged at the bottom, threads are arranged at one end, close to the screwing head, of the screw rod, and a groove is formed at one end, close to the bolt head, of the screw rod; a cutting groove is arranged between the screw rod and the wrenching head, the cutting groove is of an inwards concave isosceles trapezoid structure, the diameter of the cutting groove is 0.5-2 mm, and the angle formed by two waists of the cutting groove is 50-60 degrees.
2. The torsional shear type high-strength bolt for the steel structure according to claim 1, characterized in that: the diameter of the cutting groove is 1 mm.
3. The torsional shear type high-strength bolt for the steel structure according to claim 1, characterized in that: the angle formed by the two waists of the cutting groove is 55 degrees.
4. The torsional shear type high-strength bolt for the steel structure according to claim 1, characterized in that: the bolt head is a round bolt head.
5. The torsional shear type high-strength bolt for the steel structure according to claim 1, characterized in that: the screw rod is made of low-carbon alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123157734.5U CN217029568U (en) | 2021-12-15 | 2021-12-15 | Torsional shear type high-strength bolt for steel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123157734.5U CN217029568U (en) | 2021-12-15 | 2021-12-15 | Torsional shear type high-strength bolt for steel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217029568U true CN217029568U (en) | 2022-07-22 |
Family
ID=82441796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123157734.5U Active CN217029568U (en) | 2021-12-15 | 2021-12-15 | Torsional shear type high-strength bolt for steel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217029568U (en) |
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2021
- 2021-12-15 CN CN202123157734.5U patent/CN217029568U/en active Active
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