CN204878212U - Split type brill tail screw - Google Patents
Split type brill tail screw Download PDFInfo
- Publication number
- CN204878212U CN204878212U CN201520432279.0U CN201520432279U CN204878212U CN 204878212 U CN204878212 U CN 204878212U CN 201520432279 U CN201520432279 U CN 201520432279U CN 204878212 U CN204878212 U CN 204878212U
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- CN
- China
- Prior art keywords
- screw rod
- screw
- spiral shell
- boss
- head
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a split type brill tail screw. Including the screw rod, the head end and the spiral shell head of screw rod are connected, and the tail end of screw rod is equipped with the brill tail, is equipped with the screw thread on the periphery of screw rod, the screw rod include first screw rod, first screw rod is connected with the second screw rod, first screw rod head end be connected with the spiral shell head, the tail end of first screw rod is equipped with the cross recess, second screw rod head end be equipped with the cross boss, second screw rod tail end is equipped with the brill tail, the cross recess be connected with the cross boss, the spiral shell head include the spiral shell umbrella, be equipped with one -level hexagonal boss on the spiral shell umbrella, be equipped with second grade hexagonal boss on the one -level hexagonal boss, the spiral shell umbrella on still be equipped with fixed unit. The utility model has the characteristics of, reduction in production cost, the replaceability is strong and the reliability is high.
Description
Technical field
The utility model relates to a kind of bolt structure, particularly a kind of split type self-tapping screw.
Background technique
Self-tapping screw be the afterbody of screw in boring tail or fine stern shape, need not secondary process, can directly at a kind of screw arranging boring on material, basic material, tapping, locking.Its advantage has in use significantly saved the engineering time.Be usually used in building and house etc. field.At present, in production and application, self-tapping screw has following shortcoming: 1) self-tapping screw is higher to the hardness requirement boring stern construction, and it is relatively low to the hardness requirement of other structures, but current self-tapping screw is integral type structure, hardness can only be improved to self-tapping screw entirety, although make the hardness of boring stern construction reach requirement, fail self-tapping screw structure is optimized, integrally-built for self-tapping screw hardness is improved, can cost of production be increased; 2) in the application, need be holed and tapping by self-tapping screw, torsion suffered by it is large, and this torsion easily makes the hexagonal boss of spiral shell head damage, thus after causing skidding is difficult to this screw to take out replace; 3) in vibration strongly and frequently structure, use self-tapping screw, self-tapping screw can be caused to occur loosening because of long-time judder, thus affect stability and the reliability of this structure.
Summary of the invention
The purpose of this utility model is, provides a kind of split type self-tapping screw.The utility model has, and reduces cost of production, the feature that replaceability is strong and reliability is high.
The technical solution of the utility model: a kind of split type self-tapping screw, comprises screw rod, the head end of screw rod is connected with spiral shell head, and the tail end of screw rod is provided with brill tail, and the circumferential surface of screw rod is provided with screw thread; Described screw rod comprises the first screw rod, and the first screw rod is connected with the second screw rod; The first described screw rod head end is connected with spiral shell head, and the tail end of the first screw rod is provided with cross recess; The second described screw rod head end is provided with cross boss, and the second screw rod tail end is provided with brill tail; Described cross recess is connected with cross boss; Described spiral shell head comprises spiral shell umbrella, and spiral shell umbrella is provided with one-level hexagonal boss, and one-level hexagonal boss is provided with secondary hexagonal boss; Described spiral shell umbrella is also provided with fixed unit.
In aforesaid split type self-tapping screw, described fixed unit comprises via hole, is provided with set screw in via hole.
Compared with prior art, the utility model is split-type structural, screw rod is divided into the first screw rod and the second screw rod, and the cross recess of the first screw rod is connected with the cross boss of the second screw rod, and the head end of the first screw rod is connected with spiral shell head; By this structure, be connected with the first screw rod again after separately the brill tail hardness of the second screw rod can being strengthened, self-tapping screw structure is optimized, in production, only need carry out hardness strengthening to the second screw rod of self-tapping screw, and without the need to strengthening self-tapping screw integral hardness, effectively reduce cost of production.Spiral shell head of the present utility model is provided with one-level hexagonal boss and secondary hexagonal boss, in application, occur skidding if one-level hexagonal boss damages because torsion is excessive, the self-tapping screw that namely will damage by secondary hexagonal boss takes out, then replaces new self-tapping screw and use; The replaceability after damaging is stronger by this structure, self-tapping screw to be occurred.The utility model is also provided with fixed unit on spiral shell umbrella, when after self-tapping screw locking, then is locked by the set screw of fixed unit; By this structure, vibrate strongly and frequently structure uses self-tapping screw time, avoid self-tapping screw and cause loosening because long-time judder occurs reverse rotation, thus improve the reliability of self-tapping screw.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the first screw rod;
Fig. 3 is the structural representation of the second screw rod.
Being labeled as in accompanying drawing: 1-screw rod, 2-spiral shell head, 3-bores tail, 4-screw thread, 5-set screw, 6-first screw rod, 7-second screw rod, 8-cross recess, 9-cross tongue, 10-spiral shell umbrella, 11-one-level hexagonal boss, 12-secondary hexagonal boss, 13-fixed unit, 14-via hole.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described, but not as the foundation limited the utility model.
Embodiment.A kind of split type self-tapping screw, form as Figure 1-3, comprise screw rod 1, the head end of screw rod 1 is fixedly connected with spiral shell head 2, and the tail end of screw rod 1 is provided with and bores tail 3, and the circumferential surface of screw rod 1 is provided with screw thread 4; Described screw rod 1 comprises the first screw rod 6, first screw rod 6 and is connected with the second screw rod 7; The first described screw rod 6 head end is fixedly connected with spiral shell head 2, and the tail end of the first screw rod 6 is provided with cross recess 8; The second described screw rod 7 head end is provided with cross boss 9, second screw rod 7 tail end and is provided with brill tail 3; Described cross recess 8 is connected with cross boss 9; Described spiral shell head 2 comprises spiral shell umbrella 10, and spiral shell umbrella 10 is provided with one-level hexagonal boss 11, and one-level hexagonal boss 11 is provided with secondary hexagonal boss 12; Described spiral shell umbrella 10 is also provided with fixed unit 13; The second described screw rod 7 can use high hardness material to increase its hardness.
Aforesaid fixed unit 13 comprises via hole 14, is provided with set screw 5 in via hole 14.
Working principle of the present utility model is, the screw screwdriver bit of screw gun is enclosed within the one-level hexagonal boss 11 of self-tapping screw, starts screw gun and is screwed by self-tapping screw, after screwing, then screwed by set screw 5, avoid loosening.When screwing self-tapping screw, if one-level hexagonal boss 11 because of torsion excessive damaged and occur skidding, replace new self-tapping screw after the self-tapping screw that counterrotating secondary hexagonal boss 12 will damage screws out.
Claims (2)
1. a split type self-tapping screw, is characterized in that: comprise screw rod (1), and the head end of screw rod (1) is connected with spiral shell head (2), and the tail end of screw rod (1) is provided with and bores tail (3), and the circumferential surface of screw rod (1) is provided with screw thread (4); Described screw rod (1) comprises the first screw rod (6), and the first screw rod (6) is connected with the second screw rod (7); Described the first screw rod (6) head end is connected with spiral shell head (2), and the tail end of the first screw rod (6) is provided with cross recess (8); Described the second screw rod (7) head end is provided with cross boss (9), and the second screw rod (7) tail end is provided with and bores tail (3); Described cross recess (8) is connected with cross boss (9); Described spiral shell head (2) comprises spiral shell umbrella (10), and spiral shell umbrella (10) is provided with one-level hexagonal boss (11), and one-level hexagonal boss (11) is provided with secondary hexagonal boss (12); Described spiral shell umbrella (10) is also provided with fixed unit (13).
2. split type self-tapping screw according to claim 1, is characterized in that: described fixed unit (13) comprises via hole (14), is provided with set screw (5) in via hole (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520432279.0U CN204878212U (en) | 2015-06-23 | 2015-06-23 | Split type brill tail screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520432279.0U CN204878212U (en) | 2015-06-23 | 2015-06-23 | Split type brill tail screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204878212U true CN204878212U (en) | 2015-12-16 |
Family
ID=54822588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520432279.0U Expired - Fee Related CN204878212U (en) | 2015-06-23 | 2015-06-23 | Split type brill tail screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204878212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402233A (en) * | 2016-01-07 | 2016-03-16 | 太仓市德浩紧固件有限公司 | Pressing rivet bolt with milled edges |
-
2015
- 2015-06-23 CN CN201520432279.0U patent/CN204878212U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402233A (en) * | 2016-01-07 | 2016-03-16 | 太仓市德浩紧固件有限公司 | Pressing rivet bolt with milled edges |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20170623 |