CN204878216U - What leakproofness was good can convenient brill tail screw of replacing - Google Patents
What leakproofness was good can convenient brill tail screw of replacing Download PDFInfo
- Publication number
- CN204878216U CN204878216U CN201520437341.5U CN201520437341U CN204878216U CN 204878216 U CN204878216 U CN 204878216U CN 201520437341 U CN201520437341 U CN 201520437341U CN 204878216 U CN204878216 U CN 204878216U
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- screw
- spiral shell
- screw rod
- self
- umbrella
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Abstract
The utility model discloses a what leakproofness was good can convenient brill tail screw of replacing. 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, still is equipped with the chip groove on the periphery of screw rod, the spiral shell head include and be equipped with the hexagonal boss on the spiral shell umbrella by the spiral shell umbrella, be equipped with the reversed -tooth thread hole on the hexagonal boss, reversed -tooth thread hole and anti - tooth screw connection, the spiral shell umbrella on still be equipped with fixed unit, the screw rod head end still be equipped with sealed cutting edge, sealed cutting edge and spiral shell umbrella are equipped with seal ring, the width W of sealed cutting edge equal 0.8-1 times of seal ring's external diameter D. The utility model has the characteristics of, the leakproofness is good, and the replaceability is strong, and the reliability is high effectual with the bat bits.
Description
Technical field
The utility model relates to a kind of bolt structure, particularly a kind of self-tapping screw that can conveniently replace of good airproof performance.
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 by spiral shell umbrella directly and fixed block surface contact seal, its sealing effect is not good; 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 sliding tooth 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; 4) current self-tapping screw, when boring and tapping, claps bits poor effect.
Summary of the invention
The purpose of this utility model is, provides a kind of self-tapping screw that can conveniently replace of good airproof performance.The utility model has, good airproof performance, and replaceability is strong, and reliability is high and clap the effective feature of bits.
The technical solution of the utility model: a kind of self-tapping screw that can conveniently replace of good airproof performance, 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, and the circumferential surface of screw rod is also provided with groove; Described spiral shell head comprises spiral shell umbrella, and spiral shell umbrella is provided with hexagonal boss, and hexagonal boss is provided with anti-pitch thread hole, and anti-pitch thread hole is connected with anti-tooth screw; Described spiral shell umbrella is also provided with fixed unit; Described screw rod head end is also provided with sealing blade, is provided with seal washer between sealing blade and spiral shell umbrella; The width W of described sealing blade equals the outer diameter D of 0.8 ~ 1 times of seal washer.
In the self-tapping screw that can conveniently replace of aforesaid good airproof performance, described fixed unit comprises via hole, is provided with set screw in via hole.
Compared with prior art, the utility model arranges sealing blade at screw rod head end, arranges seal washer between sealing blade and spiral shell umbrella; By this structure, when self-tapping screw drilling-tapping to sealing blade position time, sealing blade start boring, when spiral shell umbrella bottom surface and the fixed block surface contact of self-tapping screw, what complete self-tapping screw screws installation action; Because of W=0.8 ~ 1D, the diameter sealing the hole that blade bores is made to be slightly less than the outer diameter D of seal washer, thus force seal washer to be compressed in the sealing blade hole of boring and the gap in this hole is filled up, so just make self-tapping screw after piercing fixed block, better tightness.Spiral shell head of the present utility model is provided with hexagonal boss and anti-pitch thread hole, in application, if hexagonal boss damages because torsion is excessive occur sliding tooth, anti-tooth screw is oppositely screwed in anti-pitch thread hole, and continue the anti-tooth screw of counterrotating, the self-tapping screw sliding tooth is oppositely screwed out, replaces new self-tapping screw afterwards again 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.The utility model is also provided with groove on the circumferential surface of screw rod; By this structure, by the chip that produces when self-tapping screw boring and tapping along outside groove tap hole, it is effective that it claps bits, avoids in hole, to cause boring because of talus accumulation and tapping efficiency is low and affect and hole and the situation of tapping effect simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation that spiral shell head is connected with screw rod.
Being labeled as in accompanying drawing: 1-screw rod, 2-spiral shell head, 3-bores tail, 4-screw thread, 5-groove, 6-spiral shell umbrella, 7-hexagonal boss, the anti-pitch thread hole of 8-, the anti-tooth screw of 9-, and 10-fixed unit, 11-seals blade, 12-seal washer, 13-via hole, 14-set screw.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described, but not as the foundation limited the utility model.
Embodiment.The self-tapping screw that can conveniently replace of good airproof performance, forms as shown in Figure 1-2, comprises screw rod 1, the head end of screw rod 1 is connected with spiral shell head 2, 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, and the circumferential surface of screw rod 1 is also provided with groove 5; Described spiral shell head 2 comprises spiral shell umbrella 6, and spiral shell umbrella 6 is provided with hexagonal boss 7, and hexagonal boss 7 is provided with anti-pitch thread hole 8, and anti-pitch thread hole 8 is connected with anti-tooth screw 9; Described spiral shell umbrella 6 is also provided with fixed unit 10; Described screw rod 1 head end is also provided with sealing blade 11, is provided with seal washer 12 between sealing blade 11 and spiral shell umbrella 6; The width W of described sealing blade 11 equals the outer diameter D of 0.8 ~ 1 times of seal washer 12.
Aforesaid fixed unit 10 comprises via hole 13, is provided with set screw 14 in via hole 13.
Working principle of the present utility model is, the screw screwdriver bit of screw gun is enclosed within the hexagonal boss 7 of self-tapping screw, start screw gun self-tapping screw is screwed, in screwing operations, chip outside groove 5 tap hole, when self-tapping screw drilling-tapping to sealing blade 11 position time, sealing blade 11 start boring, when spiral shell umbrella 6 bottom surface and the fixed block surface contact of self-tapping screw, what complete self-tapping screw screws installation action; After screwing, then set screw 14 is screwed, avoid loosening.When screwing self-tapping screw, if hexagonal boss 7 because of torsion excessive damaged and occur sliding dental phenomenon, anti-tooth screw 9 is oppositely screwed in anti-pitch thread hole 8, after being screwed into, continue the anti-tooth screw 9 of counterrotating, the self-tapping screw now damaged oppositely screws out, and after screwing out, replaces new self-tapping screw and screws in.
Claims (2)
1. the self-tapping screw that can conveniently replace of a good airproof performance, it is characterized in that: comprise screw rod (1), the head end of screw rod (1) is connected with spiral shell head (2), the tail end of screw rod (1) is provided with and bores tail (3), the circumferential surface of screw rod (1) is provided with screw thread (4), the circumferential surface of screw rod (1) is also provided with groove (5); Described spiral shell head (2) comprises spiral shell umbrella (6), and spiral shell umbrella (6) is provided with hexagonal boss (7), and hexagonal boss (7) is provided with anti-pitch thread hole (8), and anti-pitch thread hole (8) is connected with anti-tooth screw (9); Described spiral shell umbrella (6) is also provided with fixed unit (10); Described screw rod (1) head end is also provided with sealing blade (11), is provided with seal washer (12) between sealing blade (11) and spiral shell umbrella (6); The width W of described sealing blade (11) equals the outer diameter D of 0.8 ~ 1 times of seal washer (12).
2. the self-tapping screw that can conveniently replace of good airproof performance according to claim 1, is characterized in that: described fixed unit (10) comprises via hole (13), is provided with set screw (14) in via hole (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520437341.5U CN204878216U (en) | 2015-06-24 | 2015-06-24 | What leakproofness was good can convenient brill tail screw of replacing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520437341.5U CN204878216U (en) | 2015-06-24 | 2015-06-24 | What leakproofness was good can convenient brill tail screw of replacing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204878216U true CN204878216U (en) | 2015-12-16 |
Family
ID=54822592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520437341.5U Expired - Fee Related CN204878216U (en) | 2015-06-24 | 2015-06-24 | What leakproofness was good can convenient brill tail screw of replacing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204878216U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948556A (en) * | 2015-06-24 | 2015-09-30 | 贵州省华科实业有限公司 | Drill tail screw with good sealing performance and strong replaceability |
-
2015
- 2015-06-24 CN CN201520437341.5U patent/CN204878216U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948556A (en) * | 2015-06-24 | 2015-09-30 | 贵州省华科实业有限公司 | Drill tail screw with good sealing performance and strong replaceability |
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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: 20170624 |