CN215257251U

CN215257251U - Novel metal tapping screw easy to attack and difficult to loosen

Info

Publication number: CN215257251U
Application number: CN202121362323.7U
Authority: CN
Inventors: 李昆仑; 郑惠
Original assignee: JIANGXI CUNJIN INDUSTRIAL CO LTD
Current assignee: JIANGXI CUNJIN INDUSTRIAL CO LTD
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-12-21
Anticipated expiration: 2031-06-18

Abstract

The utility model discloses a novel metal is easily attacked and is difficult to move back loose self-tapping screw relates to fastener technical field, including the screw body, the screw body is including screwing up seat and the nail body, the outer circumference of the nail body is equipped with the triangle screw thread, head end is attacked into for the screw bottom the nail body, just the screw is attacked into head end external circumference and is equipped with the leading-in tooth of multilayer, three inward groove has been seted up along leading-in tooth equipartition on the screw attack head, and inward groove is triangle cambered surface fluted type, carries out the configuration optimization design through attacking the head end at the screw, and its purpose is attack into the depth of cut in order to increase the front end screw thread, reduces rear end screw thread attack resistance to carry out quick chip removal through three axial recess on the three big cambered surface, thereby reach easily attack, attack resistance purpose for a short time, this kind of design can ensure that self-tapping internal thread face and self-tapping screw cooperation area are big, whole screw thread attack process uniformity, The interchangeability is good, thereby increasing the loosening resistance after locking, namely a larger loosening moment.

Description

Novel metal tapping screw easy to attack and difficult to loosen

Technical Field

The utility model relates to a fastener technical field specifically is a novel metal easily attacks difficult loose self-tapping screw that moves back.

Background

At present, metal self-tapping screws commonly used in the fields of electronics, automobiles and the like are triangular self-tapping screws, and compared with non-triangular self-tapping screws, the screws are used for carrying out thread tapping assembly connection on metal holes which need to be tapped and do not have inner screw holes, the torque ratio of tapped threaded holes is obviously smaller, the tapping assembly speed is obviously higher, and the loosening torque after assembly and screwing is also obviously larger. However, in order to further reduce the tapping assembly torque on the basis to increase the assembly speed, and meanwhile, the back loosening torque of the metal plate is required to be reduced during tapping, assembling and screwing, the conventional triangular metal self-tapping screw cannot be reduced, and the 3-thread pitch of the end head is unfavorable to the tooth edge of the inner thread tooth and scrap iron generated in the self-tapping process cannot be removed timely when the self-tapping process is started, so that the self-tapping forming of the inner hole of the metal plate is irregular or the scrap iron is adhered, and a relatively large tapping torque is generated in the self-tapping assembly process of the metal plate. And because the forming of the self-tapping inner hole is not standard, the attaching area of the screw after the external thread of the screw and the self-tapping inner thread of the connecting plate are screwed down is relatively reduced, so that the loosening prevention torque of the screw is reduced. The structure of a conventional metal triangular self-tapping screw is described in detail in the attached fig. 1.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel metal is easily attacked and is difficult to move back loose self-tapping screw to solve the problem in the above-mentioned technical background. In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel metal is easily attacked and is difficult to move back loose self-tapping screw, includes the screw body, the screw body is including screwing up seat and the nail body, the outer circumference of the nail body is equipped with the triangle screw thread, head end is attacked for the screw to nail body bottom, just the outer circumference of head end is attacked into to the screw is equipped with the leading-in tooth of multilayer, the screw is attacked into and is seted up three to the recess in along leading-in tooth equipartition on the head, the inward recess is triangle cambered surface fluted type.

As a further aspect of the present invention: and a connecting block is arranged between the nail body and the tightening seat.

As a further aspect of the present invention: the tightening seat is a nut of a hexagonal structure, and an auxiliary tightening groove is formed in the top of the tightening seat.

As a further aspect of the present invention: the screw body is made of various types of carbon steel M3.

As a further aspect of the present invention: three leading-in teeth are arranged on the outer circumference of the tapping head end of the screw.

As a further aspect of the present invention: the screwing seat, the connecting block, the screw body and the screw tapping head end are integrally formed.

Has the advantages that:

1. the utility model discloses a tap into three knot tooth within range tooth types of head end at the screw and carry out configuration optimization design, its purpose is attacked to enter in the depth of cut in order to increase the front end screw thread, reduces the rear end screw thread and attacks the resistance to carry out quick chip removal through three inside recess on the three major arc face, thereby reach easily attack, attack the resistance purpose for a short time. In addition, the special triangular thread surface design can ensure that the matching area of the self-tapping inner thread surface and the self-tapping screw is large, and the consistency and the interchangeability are good in the whole thread tapping process, so that the loosening resistance after locking, namely a larger loosening torque, is increased.

2. The utility model discloses be equipped with the connecting block between screwing up seat and the nail body, make the nail body at the embedding in-process through this setting, the connecting block produces spacing effect, avoids screwing up the seat and imbeds workpiece surface.

3. The utility model discloses screw up the seat top and seted up supplementary mounting groove, make the screw body when carrying out embedding work through this setting, it is more convenient.

Drawings

FIG. 1 is a schematic front view of the prior art;

FIG. 2 is a schematic bottom view of the prior art;

FIG. 3 is a schematic structural view of the present invention;

fig. 4 is a schematic bottom view of the present invention.

In the figure: 1. screwing the seat; 2. connecting blocks; 3. a nail body; 4. an inward groove; 5. the tooth is introduced.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a following technical scheme:

as shown in figures 1-4, a novel metal tapping screw easy to attack and loosen and difficult to withdraw comprises a screw body, the screw body comprises a screwing seat 1 and a screw body 3, a connecting block 2 is arranged between the screw body 3 and the screwing seat 1, the novel metal tapping screw easy to attack and loosen and difficult to withdraw is characterized in that the connecting block 2 is arranged between the screwing seat 1 and the screw body 3, so that the connecting block 2 can generate a limiting effect to prevent the screwing seat 1 from being embedded into the surface of a workpiece in the process of embedding the screw body 3 into the workpiece, the screwing seat 1 is a nut with a hexagonal structure, an auxiliary screwing groove is arranged at the top of the screwing seat 1, the novel metal tapping screw easy to attack and loosen and difficult to withdraw is more convenient by arranging the auxiliary mounting groove at the top of the screwing seat 1, a triangular thread is arranged on the outer circumference of the screw body 3, the bottom of the screw body 3 is used for the attack and the head end of the screw, and three layers of leading-in teeth 5 are arranged on the outer circumference of the head end of the screw body, attack into the screw and seted up three inward recess 4 along leading-in tooth 5 equipartitions on the head, a plurality of inward recesses 4 are triangle cambered surface type recess, triangle cambered surface type recess both sides are the cutting face, this novel metal easily attacks difficult back pine self-tapping screw has seted up three inward recess 4 through attacking on the head along leading-in tooth 5 equipartitions, its purpose is attacked into the depth of cut in order to increase the front end screw, reduce the rear end screw and attack the resistance, and carry out quick chip removal through three inward recess 4 on the three big arc surface, thereby reach easily to attack, attack the resistance purpose for a short time.

The utility model relates to a novel metal is easily attacked difficult loose self-tapping screw that moves back in the course of the work, easily attack difficult loose self-tapping screw that moves back through use of tool with novel metal and push down and in the screw in work piece, this in-process can use the better tightening of supplementary tightening groove again, triangle self-tapping screw and the triangular belt cambered surface recess that is equipped with on the nail body, mutually support and accomplish tightening fixed work, compared with the prior art, this kind of special triangle flank of thread design can ensure that self-tapping internal thread face is big with self-tapping screw cooperation area, it is big to make whole screw thread attack the process uniformity, interchangeability is good, thereby the loose resistance that moves back after having increased locking, the great loose moment that moves back promptly.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a novel metal is easily attacked and is difficult to move back loose self-tapping screw, includes the screw body, its characterized in that: the screw body is including screwing up seat (1) and the nail body (3), the outer circumference of the nail body (3) is equipped with the triangle screw thread, the head end is attacked for the screw to nail body (3) bottom, just the outer circumference of head end is attacked to the screw is equipped with leading-in tooth of multilayer (5), three inside recess (4) have been seted up along leading-in tooth (5) equipartition on attacking the head end to the screw, just inside recess (4) are triangle cambered surface groove type.

2. The novel metal tapping screw easy to attack and difficult to withdraw as claimed in claim 1, wherein: a connecting block (2) is arranged between the nail body (3) and the screwing seat (1).

3. The novel metal tapping screw easy to attack and difficult to withdraw as claimed in claim 1, wherein: the tightening seat (1) is a nut of a hexagonal structure, and an auxiliary tightening groove is formed in the top of the tightening seat (1).

4. The novel metal tapping screw easy to attack and difficult to withdraw as claimed in claim 1, wherein: the screw body is made of various types of carbon steel M3.

5. The novel metal tapping screw easy to attack and difficult to withdraw as claimed in claim 1, wherein: three leading-in teeth (5) are arranged on the outer circumference of the tapping head end of the screw.

6. The novel metal tapping screw easy to attack and difficult to withdraw as claimed in claim 2, wherein: the screwing seat (1), the connecting block (2), the nail body (3) and the screw tapping head end are integrally formed.