CN208764078U - A kind of tapping screw - Google Patents
A kind of tapping screw Download PDFInfo
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- CN208764078U CN208764078U CN201821057089.5U CN201821057089U CN208764078U CN 208764078 U CN208764078 U CN 208764078U CN 201821057089 U CN201821057089 U CN 201821057089U CN 208764078 U CN208764078 U CN 208764078U
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- thread
- tapping screw
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Abstract
The utility model discloses a kind of tapping screw, belongs to connector technical field.It includes including head and screw bar portion, and screw bar part is parallel thread portion and conical thread；Parallel thread portion has the first triangle thread of full tooth；Conical thread has the second triangle thread.The tapping screw of the utility model uses parallel thread portion and carburizing heat treatment with full tooth triangle thread, therefore during tapping screw is installed, existing chip space reduces the area of cut and radial force of tapping screw again, the cutting ability and intensity for increasing screw simultaneously, it is not easy to break when installing heavy section casting of the fastener material for the radiator of pack alloy etc；In addition the guiding role of conical thread keeps installation tapping screw reliable and stable.
Description
Technical field
The utility model belongs to connector technical field, is related to a kind of screw, especially a kind of tapping screw.
Background technique
Tapping screw is chiefly used between thin metal plate (steel plate, saw plate etc.), between plastic part and between other materials
Be fastenedly connected.When connection, thread Pilot hole first is produced to connected piece, then tapping screw is screwed into the thread Pilot hole of connected piece
In.Due to tapping screw can in the thread Pilot hole of connected piece tapping internal screw thread, to form connection.
More and more car lights use LED as light source at present, but the luminous flux of LED and service life are affected by temperature spy
It is not big, for a long time under high temperature environment, it will cause that LED is irreversible dimmed or damage.Therefore, in order to which the heat dissipation for solving LED is asked
Topic, generallys use tapping screw and is fastenedly connected LED circuit board and radiator, at present to solve heat dissipation problem.Due to radiator
Material be pack alloy, pilot hole is deeper, and wall thickness is larger.The screw chasing performance of common tapping screw is poor, and screw thread is cut
Bevel is larger, can generate biggish radial force, screws that torque is larger, and tapping screw is easily broken off when assembling radiator.
Application No. is 201120301296.2 patents, disclose a kind of tapping screw, and it is uneven that protrusion is arranged on screw rod
Even thread to reduce the area of cut and radial force of tapping screw, and then is reduced to clear-cut property material installation and thin-walled equipment
Destructive power, increase chip space, improve guiding performance and have antidetonation loosen performance.But the cutting ability of the tapping screw and
Intensity is insufficient, and it is still larger to screw torque when assembling radiator, is easily broken off.Therefore, which is only applicable to simply
Property material installation and thin-walled equipment, be not particularly suited for the heavy section casting of radiator that material is pack alloy etc.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of tapping screw.
To achieve the above object, the utility model adopts the following technical solutions:
A kind of tapping screw, the tapping screw include head and screw bar portion, and screw bar part is parallel thread portion and cone
Shape threaded portion；Parallel thread portion has the first triangle thread of full tooth；Conical thread has the second triangle thread.
Further, the cross section size in parallel thread portion is identical from its head end to its tail end；
The cross section size of conical thread gradually becomes smaller from its head end to its tail end.
Further, be to improve screw intensity, impact flexibility and wearability, the tapping screw before plating through carburizing heat at
Reason, core hardness be 290~370HV, surface hardness be greater than or equal to 450HV, carburized layer thickness be 0.05~
0.18mm。
Further, to further increase cutting ability, the thread form angle of the first triangle thread and the second triangle thread
It is 60 degree.
Further, the shape on head is coiled hair or countersunk head.
Further, the surface on head is equipped with the interior hexagonal flower-shape slot for screwing the tapping screw.
The utility model has the advantages that
Tapping screw of the invention uses parallel thread portion and carburizing heat treatment with full tooth triangle thread, therefore
During installing tapping screw, existing chip space reduces the area of cut and radial force of tapping screw again, increases simultaneously
The cutting ability and intensity for having added screw are not easy when installing heavy section casting of the fastener material for the radiator of pack alloy etc
Fracture；In addition the guiding role of conical thread keeps installation tapping screw reliable and stable.
Detailed description of the invention
Fig. 1 is the main view of the tapping screw of one embodiment of the invention；
Fig. 2 is the left view of the tapping screw of one embodiment of the invention；
Fig. 3 is the partial enlarged view of Fig. 1 intermediate cam shape screw thread；
Fig. 4 be in Fig. 1 along A-A to cross-sectional view；
Fig. 5 is the cross-sectional view in Fig. 1 along B-B direction；
In figure: the head 1-, hexagonal flower-shape slot in 11-, 2- shank of screw, 21- parallel thread portion, 211- the first triangle spiral shell
Line, 22- conical thread, the second triangle thread of 221-.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
The present embodiment proposes a kind of tapping screw, and as shown in Figure 1, 2, which includes head 1 and screw bar portion 2,
Screw bar portion 2 is divided for parallel thread portion 21 and conical thread 22；As shown in Fig. 1,4, parallel thread portion 21 has the first triangle
The cross section size of shape screw thread 211, parallel thread portion 21 is identical from its head end to its tail end, is installing the tapping screw in this way
In the process, existing chip space reduces the area of cut and radial force of tapping screw again, while increasing the machinability of screw
Energy.
As shown in Figure 1,5, conical thread 22 has the second triangle thread 221, and the cross section of conical thread 22 is big
It is small to be gradually become smaller from its head end to its tail end, it is convenient for guiding role in this way, keeps installation tapping screw reliable and stable.
As shown in Figure 1, in order to improve screw intensity, parallel thread portion 21 has the first triangle thread 211 of full tooth.
It is heat-treated before plating through carburizing to improve screw intensity, impact flexibility and wearability, the tapping screw, core
Hardness is 290~370HV, and surface hardness is greater than or equal to 450HV, and carburized layer thickness is 0.05~0.18mm.
As shown in figure 3, to further increase cutting ability, the first triangle thread 211 and the second triangle thread 221
Thread form angle is 60 degree.
As shown in Fig. 2, the shape on head 1 is coiled hair, or countersunk head.
As shown in Fig. 2, the surface on head 1 is equipped with the interior hexagonal flower-shape slot 11 for screwing the tapping screw, or
Cross recess.
Limitation to scope of protection of the utility model, those skilled in the art should understand that, in the skill of the utility model
On the basis of art scheme, the various modifications or variations that can be made by those skilled in the art with little creative work still exists
Within the protection scope of the utility model.
Claims (5)
1. a kind of tapping screw, the tapping screw includes head (1) and screw bar portion (2), it is characterised in that: the shank of screw
Portion (2) is divided into parallel thread portion (21) and conical thread (22)；The parallel thread portion (21) has the first triangle of full tooth
Shape screw thread (211)；The conical thread (22) has the second triangle thread (221)；The tapping screw passes through before plating
Carburizing heat treatment, core hardness are 290~370HV, and surface hardness is greater than or equal to 450HV, and carburized layer thickness is
0.05~0.18mm.
2. tapping screw according to claim 1, it is characterised in that: the cross section size of the parallel thread portion (21) from
Its head end is identical to its tail end；
The cross section size of the conical thread (22) gradually becomes smaller from its head end to its tail end.
3. tapping screw according to claim 1, it is characterised in that: first triangle thread (211) and described
The thread form angle of two triangle threads (221) is 60 degree.
4. tapping screw according to claim 1, it is characterised in that: the shape of the head (1) is coiled hair or countersunk head.
5. tapping screw according to claim 4, it is characterised in that: the surface of the head (1) is equipped with for screwing
State the interior hexagonal flower-shape slot (11) of tapping screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821057089.5U CN208764078U (en) | 2018-07-05 | 2018-07-05 | A kind of tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821057089.5U CN208764078U (en) | 2018-07-05 | 2018-07-05 | A kind of tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208764078U true CN208764078U (en) | 2019-04-19 |
Family
ID=66128164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821057089.5U Active CN208764078U (en) | 2018-07-05 | 2018-07-05 | A kind of tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208764078U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953234A (en) * | 2019-12-18 | 2020-04-03 | 惠州卓越紧固系统有限公司 | Triangular threaded screw and design method |
| CN111853020A (en) * | 2020-07-23 | 2020-10-30 | 浙江明泰控股发展股份有限公司 | Self-tapping screw quickly installed on plastic part and machining device of self-tapping screw |
-
2018
- 2018-07-05 CN CN201821057089.5U patent/CN208764078U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110953234A (en) * | 2019-12-18 | 2020-04-03 | 惠州卓越紧固系统有限公司 | Triangular threaded screw and design method |
| CN111853020A (en) * | 2020-07-23 | 2020-10-30 | 浙江明泰控股发展股份有限公司 | Self-tapping screw quickly installed on plastic part and machining device of self-tapping screw |
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| GR01 | Patent grant |