CN214274183U

CN214274183U - High-stability self-tapping screw

Info

Publication number: CN214274183U
Application number: CN202022734045.5U
Authority: CN
Inventors: 董建生
Original assignee: Jiashan Dongrun Fastener Co ltd
Current assignee: Jiashan Dongrun Fastener Co ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-09-24
Anticipated expiration: 2030-11-23

Abstract

The utility model provides a high stability type self-tapping screw includes the screw rod, and locates the self-tapping drill of screw rod one end. The screw rod is including covering thread groove on the whole screw rod, self-tapping drill includes the drill bit main part, locates the cutting edge of drill bit main part side, and locate the cutting edge is close to the chip groove of the center pin direction of drill bit main part. The self-tapping drill bit further comprises a drill vertex angle, the self-tapping screw is used for drilling a fixed point on a plate needing to be fastened through the drill vertex angle, in the fastening process, the plate is cut through the cutting edge, and cut waste materials are discharged through the chip groove. This high stability type self-tapping screw self-tapping effect is fast and can be fast with the waste discharge, has improved work efficiency.

Description

High-stability self-tapping screw

Technical Field

The utility model belongs to the technical field of the screw, especially a high stability type self-tapping screw.

Background

A screw is a common attachment, which is a tool that fastens parts of an object step by step using the oblique circular rotation of the object and the physics and mathematics of friction and distancing. The screw is indispensable industry requisite in daily life: extremely small screws used for cameras, glasses, clocks, electronics, and the like; general screws for televisions, electric appliances, musical instruments, furniture, and the like; large screws and screw caps are used for engineering, buildings and bridges; transportation equipment, airplanes, electric cars, automobiles, and the like are combined by large and small screws. Screws are an important task in industry, and as long as there is industry on earth, the function of screws is of permanent importance. The screw is a common invention in production and life of people for thousands of years.

In the prior art, the screw still has the problems of poor self-tapping performance and incapability of effectively discharging waste materials after self-tapping.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a high stability type self-tapping screw with self-tapping drill to satisfy the industrial demand.

A high-stability tapping screw includes a nut portion, a threaded portion provided at one end of the nut portion, and a lead-in portion provided at the other end of the threaded portion. The thread part comprises a screw fixedly connected to one end of the nail cap part and an external thread arranged on the side wall of the screw. The leading-in portion includes a fixed connection and is in the screw rod is kept away from the self-tapping drill of nail cap one end, and one sets up the brill apex angle of self-tapping drill one end. The self-tapping drill comprises two cutting edges which are symmetrically arranged, and the two cutting edges are overlapped together. Every the cutting edge includes a cutting edge main part, one sets up the chip groove on a cutting edge main part side end face, and one sets up cutting edge on the chip groove edge. And one end of the chip groove, which is close to the thread part, is communicated with the external thread in a linking way. The cutting edge is obliquely arranged on the cutting edge main body. On a cross section perpendicular to the central axis of the threaded part, the angle between the cutting edge and the chip groove ranges from 120 degrees to 130 degrees, so that the cutting edge can cut a workpiece conveniently.

Further, the nail head part comprises a nail head and a flange arranged on one end face of the nail head.

Furthermore, the thread part also comprises a movable gasket which is sleeved on the screw rod and is abutted against one end face of the nail cap.

Further, the movable gasket comprises a gasket main body and a buffer layer arranged on the side, opposite to the nail cap, of the gasket main body.

Furthermore, on the section along the central axis of the movable gasket, the outer contour of the movable gasket is an isosceles quadrangle, and the side length of the isosceles quadrangle close to the nail cap is larger than the side length of the isosceles quadrangle far away from the nail cap.

Furthermore, the outer contour of one end of the drill vertex angle, which is far away from the thread part, is tapered, and the included angle of the drill vertex angle is 115 degrees to 120 degrees.

Further, the self-tapping drill and the screw are integrally formed.

Compared with the prior art, the utility model provides a pair of high stability type self-tapping screw passes through the fixed point is beaten down to the brill apex angle on the panel that needs the fastening, in fastening process, through the cutting edge cuts panel to the waste material that will cut down passes through the chip groove is discharged, is following the perpendicular to on the cross-section of screw thread portion center pin, the cutting edge with angle range 120 ~ 130 degrees between the chip groove, can be better with the effort to cutting workpiece on, thereby improve cutting efficiency. This high stability type self-tapping screw self-tapping effect is fast and can be fast with the waste discharge, has improved work efficiency.

Drawings

Fig. 1 is a schematic structural view of the high-stability tapping screw provided by the present invention.

Fig. 2 is a partially enlarged view of a bit body of the high stability type automatic screw of fig. 1.

Fig. 3 is another perspective view of the high stability self-tapping screw of fig. 1.

Fig. 4 is a sectional view of the high-stability tapping screw of fig. 1.

Detailed Description

Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

As shown in fig. 1 to 4, it is a schematic structural diagram of a high-stability tapping screw provided by the present invention. The high-stability type tapping screw includes a cap portion 10, a threaded portion 20 provided at one end of the cap portion 10, and an introduction portion 30 provided at the other end of the threaded portion 20. The high stability self-tapping screw may further include other functional modules, such as a hexagonal nut, etc., which should be known to those skilled in the art and will not be described in detail herein.

The nut portion 10 includes a nut 11 and a flange 12 provided on an end surface of the nut 11.

The nut 11 is used for a user to twist so that the whole screw can rotate, in this embodiment, the outer contour of the nut 11 is hexagonal, and the nut 11 is a kind of prior art, and will not be described herein again.

The flange 12 is disposed on an end surface of the nut 11 facing the screw portion 20, and the diameter of the flange 12 is larger than the diameters of the nut 11 and the screw portion 20, so as to protect the screw portion 20 and prevent damage to the surface of an object when the high-stability self-tapping screw is screwed.

The threaded portion 20 includes a threaded rod 21 fixedly connected to one end of the nut portion 10, an external thread 22 disposed on a sidewall of the threaded rod 21, and a removable spacer 23 disposed on the threaded rod 21 and abutting against an end surface of the nut 11. In the present embodiment, the male screw 22 has a function of discharging scraps while fastening, and the male screw 22 is combined with the introduction part 30 to discharge scraps, so the male screw 22 is combined with the introduction part 30 to be described in detail.

The removable gasket 23 includes a gasket body 231, and a buffer layer 232 disposed on a side of the gasket body 231 facing away from the nut 11. In the section along the central axis of the movable pad 23, the outer contour of the movable pad 23 is an isosceles quadrangle, and the side of the isosceles quadrangle close to the nail head 11 is longer than the side far from the nail head 11, and it is conceivable that the movable pad 23 is tapered. In this embodiment, the gasket main body 231 is made of metal to ensure the stability of the whole gasket main body 231, and the buffer layer 232 is made of rubber to further protect the object surface from being scratched when the movable gasket 23 is fastened, and at the same time, to give a supporting force to the screw rod 21 to make it more stable.

The lead-in part 30 comprises a self-tapping drill 31 fixedly connected to one end of the screw 21 far away from the nut 11, and a drill tip 33 arranged at one end of the self-tapping drill 31.

The self-tapping drill 31 comprises two symmetrically arranged cutting edges 32. And two of the cutting edges 32 overlap each other. Each of the cutting edges 32 includes a cutting edge body 321, a chip groove 322 provided on an end surface of a side of the cutting edge body 321, and a cutting edge 323 provided on an edge of the chip groove 322. The tapping bit 31 and the screw 21 are integrally formed to ensure stability between the introduction portion 30 and the screw portion 20.

The self-tapping drill 31 is fixed on a board needing to be fastened through the drill vertex angle 33, and in the fastening process, the board is cut through the cutting edge 32, and cut waste materials are discharged through the chip discharge groove 322.

One end of the flute 322 is disposed on the cutting edge main body 321 from the drill vertex 33 toward the screw 21. The chip groove 322 is close to the one end of screw thread portion 20 with external screw thread 22 links up and communicates with each other, just chip groove 322 is followed it is in by shallow to dark design and with external screw thread 22 links up to bore apex angle 33 end. In the process of drilling the hole in the lead-in part 30, the cutting edge 323 is obliquely arranged, so that waste generated by the cutting edge 32 is conveyed to the external thread 22 through the chip groove 322, and the high-stability self-tapping screw is more convenient to use.

The cutting edge 323 is obliquely disposed on the cutting edge body 321. In a cross section perpendicular to the central axis of the threaded part 20, the angle between the cutting edge 323 and the chip groove 322 is in the range of 120 to 130 degrees, so that the cutting edge 323 can cut a workpiece. The cutting edge 323 of the cutting edge 32 rotates obliquely at 120-130 degrees to cut, so that force can be better applied to a cutting workpiece, and the cutting efficiency is improved. The drill vertex angle 33 is the end of the two cutting edges 32 facing away from one end of the screw 21. The cutting edge 323 is provided at an edge of the cutting edge main body 321, and it is conceivable that the cutting edge 323 is also provided at a side edge of the cutting edge main body 321 near the drill tip 33. The outer contour of one end of the drill vertex angle 33, which is far away from the thread part 20, is tapered, the included angle of the drill vertex angle 33 is 115 degrees to 120 degrees, and the included angle of the end part of the drill vertex angle 33 can be designed according to actual requirements. If the cutting tool is applied to soft metal such as aluminum plates, a small angle can be used, so that the force generated during cutting is diffused towards the left side and the right side, and the efficiency is improved. The drill point 33 is used to set a point on the board to be fastened, so as to prevent the high-stability self-tapping screw from slipping off during the self-tapping process. It is conceivable that the high-stability tapping screw may be coated with an alloy such as duralumin alloy or the like on its surface to increase the surface hardness thereof to ensure the working efficiency in some applications where the hardness is high.

In use, a worker places a fixed point on the board or other component through the drill point 33 by the tapping screw, and gives a force toward the board or component to the high-stability tapping screw by the worker himself, so that the cutting edge 323 contacts and cuts the surface of the board or component. In addition, the cutting edge 32 is provided with the chip groove 322, and the chip groove 322 is used for uniformly collecting waste materials generated in the self-tapping process and discharging the waste materials through the external thread 22. So that the high-stability self-tapping screw can quickly complete self-tapping in the self-tapping fastening process to achieve the fastening effect required by expectation.

Compared with the prior art, the utility model provides a high stability type self-tapping screw passes through the fixed point is beaten down to bore apex angle 33 on the panel that needs the fastening, in fastening process, through cutting edge 32 cuts panel to the waste material that will cut down passes through chip groove 322 discharges, is following the perpendicular to on the cross-section of screw thread portion 20 center pin, cutting edge 323 with angle range 120 ~ 130 degrees between the chip groove 322, can be better with the effort to the cutting work piece on, thereby improve cutting efficiency. This high stability type self-tapping screw self-tapping effect is fast and can be fast with the waste discharge, has improved work efficiency.

The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.

Claims

1. A high stability self-tapping screw which characterized in that: high stability type self-tapping screw includes a screw cap portion, and a setting is in the screw thread portion of screw cap portion one end, and a setting is in leading-in portion on the screw thread portion other end, screw thread portion includes a fixed connection in the screw rod of screw cap portion one end, and a setting is in external screw thread on the screw rod lateral wall, leading-in portion includes a fixed connection in the screw rod is kept away from the self-tapping drill of screw cap one end, and a setting is in the drill apex angle of self-tapping drill one end, the self-tapping drill includes the cutting edge that two symmetries set up, and two the cutting edge overlaps mutually, every the cutting edge includes a cutting edge main part, a setting is in the chip groove on cutting edge main part side end face, and one sets up cutting edge on the chip groove edge, the chip groove is close to the one end of screw thread portion with the external screw thread links up and communicates with each other, the cutting edge is obliquely arranged on the cutting edge main body, the cutting edge is perpendicular to the cross section of the central shaft of the threaded portion, and the angle between the cutting edge and the chip discharge groove ranges from 120 degrees to 130 degrees, so that the cutting edge can cut a workpiece.

2. A highly stable self-tapping screw as in claim 1 wherein: the nail cap part comprises a nail cap and a flange arranged on one end face of the nail cap.

3. A highly stable self-tapping screw as in claim 1 wherein: the thread part also comprises a movable gasket which is sleeved on the screw rod and is abutted against one end face of the nail cap.

4. A highly stable self-tapping screw as in claim 1 wherein: the outer contour of one end of the drill vertex angle, which is far away from the thread part, is tapered, and the included angle of the drill vertex angle is 115 degrees to 120 degrees.

5. A highly stable self-tapping screw as in claim 1 wherein: the self-tapping drill and the screw are integrally formed.

6. A highly stable self-tapping screw as in claim 3 wherein: the movable gasket comprises a gasket main body and a buffer layer arranged on one side of the gasket main body, which is back to the nail cap.

7. A highly stable self-tapping screw as in claim 3 wherein: on the section along the central axis of the movable gasket, the outer contour of the movable gasket is an isosceles quadrangle, and the side length of the isosceles quadrangle close to one side of the nail cap is larger than the side length of the movable gasket far away from one side of the nail cap.