CN210343973U

CN210343973U - Fixed-torque fixed head-stop screw

Info

Publication number: CN210343973U
Application number: CN201822151079.4U
Authority: CN
Inventors: 陶鸿安; 张奕; 虞建石
Original assignee: Nantong Zhengdao Metal Structure Engineering Co ltd; SHANGHAI JINMA HIGH STRENGTH FASTENER CO Ltd
Current assignee: Nantong Zhengdao Metal Structure Engineering Co ltd; SHANGHAI JINMA HIGH STRENGTH FASTENER CO Ltd
Priority date: 2018-12-20
Filing date: 2018-12-20
Publication date: 2020-04-17
Anticipated expiration: 2028-12-20

Abstract

The utility model provides a fixed-torque fixed head screw, which comprises a screw body with a thread on the outer peripheral surface, wherein one end of the screw body is connected with the head of a screw; the fixed-torque fixed-head screw further comprises a power assisting section, the power assisting section is connected with the head of the screw through a connecting portion, and the central axis of the screw body, the central axis of the head of the screw, 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 fixed head screw that ends of turning round has effectively saved the required power of exerting of assembly through the helping hand section for the assembly is more light convenient, 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, with the assembly requirement of ensureing the screw.

Description

Fixed-torque fixed head-stop screw

Technical Field

The utility model relates to a connecting piece, in particular to decide to turn round fixed head screw.

Background

In the prior art, a screw is assembled by clamping a tool at the head of the screw and then applying a torque force to the screw to assemble the screw. However, the size of the head of the existing screw is limited, so that the size of the torsion of the existing screw is limited, and the assembly is very laborious.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a surely turn round fixed head screw in order to overcome the hard defect of screw assembly among the prior art.

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

a fixed-torque fixed-head screw is characterized by comprising a screw body with threads on the outer peripheral surface, wherein one end of the screw body is connected with the head of a screw; the fixed-torque fixed-head screw further comprises a power assisting section, the power assisting section is connected with the head of the screw through a connecting portion, and the central axis of the screw body, the central axis of the head of the screw, 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 screw assembling process, so that the assembly is easier, the consistency of screw assembling axial force is achieved, and the stability of screw connecting points is ensured.

Wherein the outer diameter of the connecting part is smaller than that of the screw 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 of the triangle which is connected with the screw head and the booster section at the same time adopts 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 power assisting section is disassembled after the angle screw is assembled, so that labor is saved and the angle screw is more quickly disassembled.

Wherein, the section of the power-assisted section vertical to the central axis thereof 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.

Wherein, the peripheral surface of the screw head part is polygonal or gear-shaped. The screw head of the section is convenient for disassembling the screw 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 fixed head screw that ends of turning round has effectively saved the required power of exerting of assembly through the helping hand section for the assembly is more light convenient, 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, with the assembly requirement of ensureing the screw.

Drawings

Fig. 1 is a schematic structural view of a fixed-torque fixed head screw 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 fixed-torque fixed-head screw in the present embodiment includes a screw body 1, and the screw body 1 is provided with threads on the outer peripheral surface thereof. A screw head 2 is attached to one end of the screw body 1. The fixed-torque fixed-head screw further comprises a power assisting section 3, the power assisting section 3 is connected with the screw head 2 through a connecting part 4, and the central axis of the screw body 1, the central axis of the screw head 2, the central axis of the connecting part 4 and the central axis of the power assisting section 3 are overlapped with each other.

In the present embodiment, the outer circumferential diameter of the connecting portion 4 is smaller than the outer circumferential diameter of the screw 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 screw 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. The cross section of the screw head can also adopt the existing cross section shape for disassembling the screw, and the details are not repeated.

When the screw is required to be assembled, the assisting section is clamped through a loading and unloading tool so as to assemble the screw, and after the screw 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 screw.

Claims

1. A fixed-torque fixed-head screw is characterized by comprising a screw body with threads on the outer peripheral surface, wherein one end of the screw body is connected with the head of a screw; the fixed-torque fixed head-stop screw further comprises a power-assisted section, the power-assisted section is connected with the head of the screw through a connecting part, and the central axis of the screw body, the central axis of the head of the screw, the central axis of the connecting part and the central axis of the power-assisted section are superposed with each other; the outer circumference diameter of the connecting part is smaller than that of the screw head; the outer peripheral diameter of the power assisting section is larger than that of the connecting part; the cross section of the outer contour of the connecting part is triangular; an angle which is simultaneously connected with the screw head and the power assisting section in the triangle adopts circular arc transition, and the radius R of the circular arc transition is 0.2-0.8 mm.

2. The fixed-torque fixed-stop head screw of claim 1, wherein the radius R of the rounded transition is 0.5 mm.

3. The fixed-torque fixed-stop head screw according to claim 2, wherein the connecting portion having a triangular outer profile in cross section has both sides opened at an angle of 45 ° to 90 °.

4. The fixed-torque fixed-stop head screw according to claim 3, wherein the connecting portion having a triangular outer profile in cross section has both sides opened at an angle of 60 °.

5. The torque-fixing setscrew according to claim 4 wherein the booster section is polygonal or gear-shaped in cross-section perpendicular to the central axis thereof.

6. The fixed-torque fixed-stop head screw according to any one of claims 1 to 5, wherein the outer peripheral surface of the head portion of the screw is polygonal or gear-shaped.