CN209781408U

CN209781408U - Fixed-torque bolt

Info

Publication number: CN209781408U
Application number: CN201822164073.0U
Authority: CN
Inventors: 陶鸿安; 张奕; 虞建石
Original assignee: Nantong Right Way Metal Structure Engineering Co Ltd; SHANGHAI JINMA HIGH STRENGTH FASTENER CO Ltd
Current assignee: Nantong Right Way Metal Structure Engineering Co Ltd; SHANGHAI JINMA HIGH STRENGTH FASTENER CO Ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2019-12-13
Anticipated expiration: 2028-12-20

Abstract

The utility model provides a fixed-torque bolt, which comprises a screw rod with a thread on the outer peripheral surface, wherein one end of the screw rod is connected with the head of a bolt, and a flange surface is arranged between the screw rod and the head of the bolt; the fixed-torque bolt further comprises a power assisting section, the power assisting section is connected with the head of the bolt through a connecting portion, and the central axis of the screw, the central axis of the head of the bolt, the central axis of the connecting portion and the central axis of the power assisting section are overlapped with each other. The utility model provides a surely turn round the bolt and effectively saved the required power of exerting of assembly through the helping hand section for it is more light convenient that the assembly, and the position disconnection of the external force messenger connecting portion of exerting circumference to the helping hand section after the assembly simultaneously reaches the light purpose of dismantling the helping hand section, has ensured the assembly requirement of bolt simultaneously.

Description

Fixed-torque bolt

Technical Field

The utility model relates to a connecting piece, in particular to decide and turn round bolt.

Background

In the prior art, a tool is clamped on the head of a bolt during assembly of the bolt, and then torsion is applied to the bolt for assembly. However, the size of the head of the existing bolt is limited, so that the size of the torsion of the existing bolt is limited, and the assembling is very laborious.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a decide and turn round bolt in order to overcome the hard defect of bolt assembly among the prior art.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

A fixed-torque bolt is characterized by comprising a screw rod with threads on the outer peripheral surface, wherein one end of the screw rod is connected with the head of a bolt, and a flange surface is arranged between the screw rod and the head of the bolt; the fixed-torque bolt further comprises a power assisting section, the power assisting section is connected with the head of the bolt through a connecting portion, and the central axis of the screw, the central axis of the head of the bolt, the central axis of the connecting portion and the central axis of the power assisting section are overlapped with each other. The power assisting section can effectively save torque force applied in the bolt assembling process, so that the assembly is easier, the bearing area of the structural bolt connecting point is increased by the flange surface, the bolt fastening effect is enhanced, and the stability of the bolt connecting point is improved.

The diameter of the periphery of the flange face is larger than the diameter of the screw rod, a slope is formed on the surface, connected with the head of the screw rod, of the flange face, and the slope of the slope is 16-25 degrees.

Wherein, the outer circumference diameter of the connecting part is smaller than that of the bolt head. The connecting part is convenient for separating the power assisting section from the screw head after the assembly is finished.

Wherein, the outer peripheral diameter of this helping hand section is greater than the outer peripheral diameter of this connecting portion. The connecting part is more convenient for separating the power assisting section from the screw head after the assembly is finished.

Wherein, the cross section of the outer contour of the connecting part is triangular.

Wherein, the corner that connects this bolt head and this helping hand section simultaneously in this triangle-shaped adopts the circular arc transition. The circular arc transition not only ensures the screw manufacturing yield, but also ensures that the torque transmission is firmer during assembly, and the cutting of the connecting part is more convenient when the cutting force is applied to the vertical central axis.

Wherein the radius R of the arc transition is 0.2-0.8 mm.

Wherein the radius R of the arc transition is 0.5 mm.

Wherein, the opening angle of two sides of the connecting part with the triangular outer profile section is 45-90 degrees.

Wherein, the two sides of the connecting part with the triangular outer profile section are opened at an angle of 60 degrees. The angle bolt is more labor-saving and faster after being assembled and disassembled in the power assisting section.

Wherein, the section of the power-assisted section vertical to the central axis thereof is polygonal or gear-shaped; the outer peripheral surface of the bolt head is polygonal or gear-shaped. The power assisting section with the cross section shape can be matched with a standard disassembling tool, so that the power assisting section is more convenient to use and more widely applicable, and the bolt head of the structure is convenient for disassembling the bolt after the power assisting section is unloaded.

In the present invention, the above-mentioned preferred conditions can be combined at will on the basis of general knowledge in the field, so as to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in: the utility model provides a surely turn round the bolt and effectively saved the required power of exerting of assembly through the helping hand section for it is more light convenient that the assembly, and the position disconnection of the external force messenger connecting portion of exerting circumference to the helping hand section after the assembly simultaneously reaches the light purpose of dismantling the helping hand section, has ensured the assembly requirement of bolt simultaneously.

Drawings

Fig. 1 is a schematic structural view of a torque-fixing bolt according to an embodiment of the present invention.

Detailed Description

The present invention will be more clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1, the torque-fixing bolt in the present embodiment includes a screw rod 1, and the screw rod 1 is provided with a thread on an outer circumferential surface thereof. One end of the screw rod 1 is connected with a bolt head 2, a flange surface 5 is arranged between the screw rod 1 and the bolt head 2, the diameter of the peripheral surface of the flange surface 5 is larger than that of the screw rod 1, a slope is formed on the surface of the flange surface 5 connected with the bolt head 2, and the slope is 16-25 degrees.

This decide and turn round bolt still includes a helping hand section 3, and this helping hand section 3 is connected with bolt head 2 through a connecting portion 4, and the axis of this screw rod 1, the axis of this bolt head 2, the axis of this connecting portion 4 and the axis of this helping hand section 3 coincide each other.

In the present exemplary embodiment, the outer circumferential diameter of the connecting portion 4 is smaller than the outer circumferential diameter of the bolt head 2 and the outer circumferential diameter of the booster stage 3. Wherein the cross section of the outer contour of the connecting part 4 is triangular. The corner of the triangle connecting the bolt head 2 and the booster section 3 at the same time adopts circular arc transition. In this embodiment, the radius R of the arc transition is 0.5 mm. Of course, in other embodiments, the radius R of the circular arc transition is selected from the range of 0.2-0.8 mm. In addition, the two sides of the connecting part 4 with the triangular outer contour cross section are opened at an angle of 60 degrees. Of course, in other embodiments, the two sides of the connecting portion 4 with the triangular outer profile cross section are opened at an angle selected from 45 ° to 90 °.

In this embodiment, the cross section of the power assisting section 3 perpendicular to the central axis thereof is in a gear shape, while in other embodiments, the cross section of the power assisting section 3 may also be in a polygon shape such as a pentagon, a hexagon and the like so as to match with a common loading and unloading tool. In order to disassemble the bolt, the cross section of the bolt head can also adopt the existing cross section shape, and the details are not repeated.

when the bolt needs to be assembled, the assisting section is clamped through a loading and unloading tool so as to assemble the bolt, and after the assisting section is assembled in place, the connecting part is broken by applying external force perpendicular to the central axis direction of the assisting section, so that the assisting section is separated from the head of the bolt.

Claims

1. A fixed-torque bolt is characterized by comprising a screw rod with threads on the outer peripheral surface, one end of the screw rod is connected with the head of a bolt, and a flange surface is arranged between the screw rod and the head of the bolt; the fixed-torque bolt further comprises a power assisting section, the power assisting section is connected with the head of the bolt through a connecting portion, and the central axis of the screw, the central axis of the head of the bolt, the central axis of the connecting portion and the central axis of the power assisting section are overlapped with each other.

2. The torque bolt according to claim 1, wherein the flange surface has a diameter greater than the diameter of the bolt head, and the surface of the flange surface that is in contact with the bolt head forms a slope having a slope of 16 ° to 25 °.

3. The torque bolt according to claim 2, wherein the connecting portion has an outer peripheral diameter smaller than an outer peripheral diameter of the bolt head.

4. The torque-securing bolt according to claim 3, wherein the outer peripheral diameter of the assisting section is larger than the outer peripheral diameter of the connecting portion.

5. The torque bolt according to claim 4, wherein the outer profile of the connecting portion is triangular in cross-section.

6. The torque-securing bolt according to claim 5, wherein a corner of the triangle connecting the bolt head and the booster section is in a circular arc transition.

7. The torque-securing bolt according to claim 6, wherein the radius R of the circular arc transition is 0.2-0.8 mm.

8. The torque bolt according to claim 7, wherein the radius R of the rounded transition is 0.5 mm.

9. The torque-fixing bolt according to claim 8, wherein the connecting portion having a triangular outer profile cross section has both sides opened at an angle of 45 ° to 90 °.

10. The torque-securing bolt according to claim 9, wherein the connecting portion having a triangular outer profile cross section is opened at an angle of 60 ° in both sides.

11. The torque-fixing bolt according to claim 10, wherein the booster section has a polygonal or gear-like cross section perpendicular to the central axis thereof; the outer peripheral surface of the bolt head is polygonal or gear-shaped.