CN101476585A - Conical internal thread - Google Patents
Conical internal thread Download PDFInfo
- Publication number
- CN101476585A CN101476585A CNA2009100058092A CN200910005809A CN101476585A CN 101476585 A CN101476585 A CN 101476585A CN A2009100058092 A CNA2009100058092 A CN A2009100058092A CN 200910005809 A CN200910005809 A CN 200910005809A CN 101476585 A CN101476585 A CN 101476585A
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- thread
- centering
- conical
- internal thread
- tooth
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Abstract
The root part between teeth of the conical internal thread is a centering slope surface, the large-diameter end at the upper part of the centering slope surface is a centering surface in interference fit with the crest of the external conical thread, the included angle beta between the centering slope surface and a main conical surface is more than 0 and less than alpha, and alpha is the inclination angle of the main conical surface. The root between the conical inner thread teeth adopts a double-conical surface structure with a centering slope surface to form a full-thread spiral interference surface, the size of the spiral interference surface can be adjusted by adjusting the tight distance so as to meet the requirement of working conditions, and the load is uniformly distributed on the full length of the thread due to the generation of the full-thread spiral interference surface; a self-locking spiral surface is formed, and the anti-loosening performance is excellent; the transverse vibration resistance is excellent, and the device can cope with frequent vibration and alternating load; abrasion and fatigue fracture are not easy to cause; the detachable type screw driver is suitable for frequent disassembly, only changes the internal thread and can be interchanged with the original product.
Description
Technical field
The present invention relates to a kind of screw thread, particularly a kind of button-type is the conical internal thread of triangle, trapezoidal, sawtooth pattern etc., is mainly used in drilling rod, oil pipe, sleeve pipe and the non-excavation drilling rod etc. of oil, geologic prospecting and exploitation.
Background technique
Tapered thread is the necessary mode of product transferring power such as the drilling rod, oil pipe, sleeve pipe, non-excavation drilling rod of oil, geologic prospecting and exploitation usefulness and medium, drilling rod, oil pipe, sleeve pipe connect by the end tapered thread, come transferring power, fed sheet of a media etc., traditional tapered thread such as API screw thread, geology screw thread are determined thread size by effective diameter of thread, it is Spielpassung that the screw pair Major Diam that forms cooperates, and guarantees by effective diameter of thread; The wire line coring drill rod thread adopts the centering of big footpath, and its common drawback is: the self-locking area is little, and anti-loosing effect is poor, load distribution is inhomogeneous, bears the frequent transverse vibration and the ability of alternating stress, and wearing and tearing and fracture easily take place at the screw thread position, especially wire line coring drilling rod wall is thin, have to adopt short tooth steep-pitch thread, it is relatively large again to bear moment of torsion, and screw thread adopts the centering of big footpath, the major part interference, the microcephaly gap, discontinuity, shortcoming is more outstanding.
Summary of the invention
The technical problem to be solved in the present invention is at the deficiencies in the prior art, has proposed a kind of complex conditions operating mode that is applicable to, anti-transverse vibration and alternating stress ability are strong, and anti-loosing effect is good, the conical internal thread of frequent dismounting.
The technical problem to be solved in the present invention is achieved through the following technical solutions, a kind of conical internal thread, be characterized in: the root between tooth and the tooth is domatic for centering, the domatic top bigger diameter end of feeling relieved is the centering face with outer cone thread crest interference fit, angle β between the domatic and main cone face of described centering is 0 °＜β＜α, and α is the tilt angle of tapered thread.
The technical problem to be solved in the present invention can also come further to realize by the following technical programs, the thread form of conical internal thread is triangle, trapezoidal, zigzag fashion, tooth is benchmark with root between the tooth with the outer cone thread crest position that cooperates with it, the bigger diameter end inwardly protruding, the described centering of the outside recessed formation of miner diameter end is domatic.
The technical problem to be solved in the present invention can also come further to realize by the following technical programs, and it is the α standard screw thread that the root of the tooth of conical internal thread constitutes the tilt angle with the intersection point of the outer cone thread crest that cooperates with it.
The present invention compared with prior art, root between conical internal thread tooth and the tooth adopts the domatic biconical surface structure of centering, form Full Thread FT spiral interference face, by adjusting tight distance, can adjust the size of spiral interference face, to meet the operating mode needs, the generation of Full Thread FT spiral interference face is evenly distributed on the full stand of thread load; Form the self-locking helicoid, have superior anti-loosening property; Has excellent anti-transverse vibration ability, reply frequent vibration and alternate load; Be difficult for causing wearing and tearing and fatigue fracture; Be fit to frequent dismounting, only change internal thread, can exchange with existing product.
Description of drawings
Fig. 1 is a structure diagram of the present invention.
Fig. 2 tapered thread tooth form enlarged view.
Embodiment
A kind of conical internal thread, root between tooth and the tooth is domatic for centering, the domatic top bigger diameter end of feeling relieved is the centering face with outer cone thread crest interference fit, and the angle β between the domatic and main cone face of described centering is 0 °＜β＜α, and α is the tilt angle of tapered thread.
The thread form of conical internal thread is triangle, trapezoidal, zigzag fashion, and tooth is benchmark with root between the tooth with the outer cone thread crest position that cooperates with it, the bigger diameter end inwardly protruding, and the described centering of the outside recessed formation of miner diameter end is domatic.
It is the α standard screw thread that the root of the tooth of conical internal thread constitutes the tilt angle with the intersection point of the outer cone thread crest that cooperates with it.
Internal thread adopts the bipyramid structure, and internal and external threads forms the tight distance of a scope of design with after cooperating, reach the interference point of the domatic and externally threaded crest bigger diameter end of internal thread centering in theory, continued to add large torque, screwed screw thread, on full stand of thread, form the interference helicoid, accomplish the end in view.
Claims (3)
1. conical internal thread, it is characterized in that: the root between tooth and the tooth is domatic for centering, the domatic top bigger diameter end of feeling relieved is the centering face with outer cone thread crest interference fit, and the angle β between the domatic and main cone face of described centering is 0 °＜β＜α, and α is the tilt angle of tapered thread.
2. conical internal thread according to claim 1, it is characterized in that: the thread form of conical internal thread is triangle, trapezoidal, zigzag fashion, tooth is benchmark with root between the tooth with the outer cone thread crest position that cooperates with it, bigger diameter end inwardly protruding miner diameter end is outwards recessed, and it is domatic to form described centering.
3. conical internal thread according to claim 1 is characterized in that: it is the α standard screw thread that the root of the tooth of conical internal thread constitutes the tilt angle with the intersection point of the outer cone thread crest that cooperates with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100058092A CN101476585A (en) | 2009-02-03 | 2009-02-03 | Conical internal thread |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100058092A CN101476585A (en) | 2009-02-03 | 2009-02-03 | Conical internal thread |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101476585A true CN101476585A (en) | 2009-07-08 |
Family
ID=40837345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100058092A Pending CN101476585A (en) | 2009-02-03 | 2009-02-03 | Conical internal thread |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101476585A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312944A (en) * | 2010-06-29 | 2012-01-11 | 比亚迪股份有限公司 | Drum brake |
| CN105443543A (en) * | 2015-11-24 | 2016-03-30 | 游奕华 | Conical threaded connecting pair |
| CN112706123A (en) * | 2019-10-24 | 2021-04-27 | 中国石油天然气股份有限公司 | Pipe taking tool |
-
2009
- 2009-02-03 CN CNA2009100058092A patent/CN101476585A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312944A (en) * | 2010-06-29 | 2012-01-11 | 比亚迪股份有限公司 | Drum brake |
| CN105443543A (en) * | 2015-11-24 | 2016-03-30 | 游奕华 | Conical threaded connecting pair |
| CN105443543B (en) * | 2015-11-24 | 2018-04-27 | 游奕华 | Tapered thread auxiliary connection |
| CN112706123A (en) * | 2019-10-24 | 2021-04-27 | 中国石油天然气股份有限公司 | Pipe taking tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090708 |