EP1716340A1 - Accouplement par vis - Google Patents

Accouplement par vis

Info

Publication number
EP1716340A1
EP1716340A1 EP05701543A EP05701543A EP1716340A1 EP 1716340 A1 EP1716340 A1 EP 1716340A1 EP 05701543 A EP05701543 A EP 05701543A EP 05701543 A EP05701543 A EP 05701543A EP 1716340 A1 EP1716340 A1 EP 1716340A1
Authority
EP
European Patent Office
Prior art keywords
thread
section
screw connection
flanks
external
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05701543A
Other languages
German (de)
English (en)
Inventor
Bernhard Arnold
Nicolas Daboval
Karl Huber
Steffen Jung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34832891&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1716340(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1716340A1 publication Critical patent/EP1716340A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/004—Sealing; Insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms

Definitions

  • the invention relates to a screw connection, with at least one first component, into which an internal thread is screwed and which is screwed with a second component, which has a corresponding external thread.
  • Such screw connections are often used as closure elements.
  • a thread sealant is usually used, which is introduced over the entire thread length between the external and the internal thread. If you want to use such a screw connection at the same time to apply a force, you can observe the effect that the sealant creeps. This causes the screw connection to settle and the clamping force of the screw connection to decrease. This can lead to a leak in the screw connection.
  • O-rings are therefore often used instead of thread sealants. The thread takes over the power transmission and the O-ring seals the screw connection.
  • the use of O-rings leads to higher component costs and a higher space requirement. At the same time, the assembly effort for the screw connection increases.
  • the object of the invention is therefore to provide a screw connection which, with a simple and inexpensive construction, allows easy assembly and ensures both a secure seal and good power transmission.
  • a tightening force F can be transmitted by means of the screw connection, a thread sealant being introduced to seal the screw connection between the external and the internal thread, and wherein the screw connection has at least a first section and a second section, wherein the second section for receiving the thread sealant is constructed differently from the first section.
  • the constructive design avoids the setting effect of the screw connection and achieves a permanently tight screw connection.
  • An advantageous embodiment of the invention provides that the external thread in the first section and in the second section has the same flank height, and that the external thread in the second section has a smaller core diameter than in the first section.
  • a continuous cavity is formed in the second section between the thread flanks of the internal thread and the thread flanks of the external thread.
  • the transmission of the tightening force therefore only takes place in the first section, in which the thread flanks of the internal and external threads have direct contact with one another.
  • the second section essentially only takes on the sealing function.
  • the cavity is preferably completely filled with thread sealant.
  • Another advantageous embodiment of the invention provides an inverse configuration of the screw connection.
  • the cavity formed by the thread flanks is preferably completely filled with thread sealant and thus in turn ensures a permanent and secure seal of the screw connection.
  • the power transmission essentially takes place again only in the first section.
  • a further advantageous embodiment of the invention provides that at least one thread of the external thread has a smaller pitch than the other threads of the external thread.
  • the thread with the smaller pitch forms the transition from the first section of the screw connection to the second section of the screw connection.
  • the threads of the external thread are thereby offset in the axial direction in the second section of the screw connection, based on the threads of the internal thread in the second section of the screw connection, so that a continuous cavity is formed in the second section of the screw connection between the thread flanks of the internal thread and the thread flanks of the external thread is. So there is no direct ,, - in the second section of the screw connection. Contact between the thread flanks of the internal thread and the thread flanks of the external thread.
  • the transmission of the tightening force therefore only takes place in the first section, in which the thread flanks of the internal and external threads have direct contact with one another.
  • the second section in turn essentially takes on only the sealing function.
  • the cavity is preferably completely filled with thread sealant.
  • Another advantageous embodiment of the invention provides the inverse configuration of the internal and external threads.
  • the thread with the larger pitch forms the transition from the first section of the screw connection to the second section of the screw connection.
  • the Threads of the internal thread are thus offset in the axial direction in the second section of the screw connection, based on the threads of the external thread in the second section of the screw connection, so that in the second section of the screw connection between the thread flanks of the internal thread and the thread flanks of the external thread a continuous cavity is trained.
  • the transmission of the tightening force therefore only takes place in the first section, in which the thread flanks of the internal and external threads have direct contact with one another.
  • the second section essentially takes over the sealing function.
  • the cavity is preferably completely filled with thread sealant.
  • Forming a thread with different pitches is possible on modern CNC-controlled machine tools, without any significant effort and without additional costs.
  • a further advantageous embodiment of the invention provides that at least one storage space is formed between the internal thread and the external thread, into which excess thread sealant can be pressed when the screw connection is tightened. This ensures that the thread flanks of the internal thread and the external thread, in the section which is used for power transmission, have direct contact with one another. This prevents the thread sealant from creeping and setting of the screw connection.
  • the storage space is formed by an annular groove in the internal thread and / or in the external thread.
  • Such an annular groove is particularly easy to insert into the internal or external thread, for example by turning, even subsequently.
  • a further advantageous embodiment of the invention provides that the thread flanks of the external thread have a smaller flank height in the second section than in the first section. Due to the reduced flank height, individual cavities are formed between the core diameter of the internal thread and the shorter thread flanks of the external thread. These cavities are preferably completely filled with thread sealant and take over the sealing function of the screw connection. The power transmission takes place via the contact surfaces of the thread flanks.
  • the advantage of this configuration is that the force is transmitted over the entire thread length and not only over a first section. Nevertheless, the functions of power transmission and sealing are separated from each other, so that creeping of the thread sealant is prevented.
  • the reduction in the flank height can already be taken into account during manufacture, or can also be formed subsequently, for example by unscrewing the thread flanks.
  • Another advantageous embodiment of the invention provides an inverse design. That that the thread flanks of the internal thread have a smaller flank height in the second section than in the first section. Due to the reduced flank height, individual cavities are again formed between the core diameter of the internal thread and the shorter thread flanks of the external thread. These cavities are preferably completely filled with thread sealant and take over the sealing function of the screw connection. The power transmission takes place in turn via the contact surfaces of the thread flanks and thus over the entire thread length.
  • the reduction in the flank height can already be taken into account during manufacture, or can also be formed subsequently, for example by unscrewing the thread flanks.
  • a particularly advantageous embodiment of the invention provides that the thread sealant only in the second Section of the screw connection is included. This immediately results in direct contact between the thread flanks of the internal and external threads in the first section of the screw connection. It is therefore not necessary to press the thread sealant out of the first section by an increased force input. In addition, no residues of the thread sealant can remain in the first section of the screw connection between the thread flank. Such residues could possibly lead to a slight setting of the screw connection after some time.
  • the invention is characterized in that the thread of the screw connection can be formed by simple and inexpensive structural measures such that the functions of force introduction and sealing are largely separated from one another. By separating the power transmission and the seals, the settling phenomena otherwise observed and the creeping of the thread sealant can be effectively prevented.
  • the threads can be produced on modern CNC-controlled machine tools in one step without additional costs.
  • FIG. 1 shows a first exemplary embodiment of the invention, in which the external thread of the screw connection, with the same flank height, has a smaller core diameter in the second section than in the first section of the screw connection,
  • Figure 2 shows a second embodiment of the invention, in which the internal thread of the screw connection, with the same flank height, has a larger core diameter in the second section than in the first section of the screw connection,
  • FIG. 3 shows a third exemplary embodiment of the invention, in which a storage space designed as an annular groove is formed between the internal thread and the external thread of the screw connection,
  • FIG. 4 shows a fourth exemplary embodiment of the invention, in which the flank height of the external thread in the second section of the screw connection is reduced, based on the flank height of the external thread in the first section of the screw connection,
  • FIG. 5 shows a fifth exemplary embodiment of the invention, in which the flank height of the internal thread in the second section of the screw connection is reduced, based on the flank height of the internal thread in the first section of the screw connection,
  • Figure 6 shows a sixth embodiment of the invention, in which a thread of the external thread has a smaller pitch than the other threads of the external thread.
  • FIG. 1 shows a screw connection in which a first component 1, which has an internal thread 2, is screwed to a second component 3, which has a corrosponding external thread 4.
  • the internal thread 2 is formed uniformly over its entire thread length. This means that the flank height as well as the core diameter and the inner diameter are the same over the entire thread length.
  • the external thread 4 also has a constant flank height over its entire thread length. However, the core diameter of the external thread 4 is in a first dimension cut 7 larger than in a second section 8.
  • the thread flanks 10 are thus slightly set back in the area of the second section 8 with respect to the thread flanks 10 in the first section.
  • the thread flanks 10 of the external thread 4 have direct contact with the thread flanks 11 of the internal thread 2 in the region of the first section 7.
  • the second section 8 there is a continuous cavity 12 between the thread flanks 11 of the internal thread 2 and the thread flanks 10 of the external thread 4 educated.
  • the cavity 12 is completely filled with a thread sealant 6. This results in a secure sealing of the screw connection.
  • the transfer of the tightening force F takes place essentially only in the first section 7, in which the thread flanks 10, 11 of the internal thread 2 and the external thread 4 have direct contact with one another.
  • the thread sealant 6 is advantageously introduced exclusively in the second section 8.
  • the production of the thread can be done easily and inexpensively with a CNC-controlled machine tool without additional effort. A setting of the screw connection due to the creeping of the thread sealant is avoided. This results in a permanently tight screw connection.
  • Figure 2 shows a second embodiment of the invention.
  • the exemplary embodiment is inverse to the exemplary embodiment in FIG.
  • the continuous cavity 12 in the second section 8 of the screw connection arises from the fact that the core diameter of the internal thread 2 in the second section 8 is larger than the core diameter of the internal thread 2 in the first section 7.
  • the thread flanks 10, 11 ha ben thus in the second section 7 no direct contact with each other and can therefore not transmit any tightening force.
  • the cavity 12 is completely filled with thread sealant.
  • the thread flanks 11 of the internal thread 2 have direct contact with the thread flanks 10 of the external thread 4 and are therefore able to transmit a tightening force F.
  • the power transmission and the sealing function of the screw connection are in turn separated from one another.
  • FIG 3 shows a third embodiment of a screw connection.
  • both the internal thread 2 and the external thread 4 are formed uniformly over the entire thread length.
  • the thread flanks 10 of the external thread 4 and the thread flanks 11 of the internal thread 2 have direct contact with one another over the entire thread length.
  • a storage space 17 is formed between the internal thread 2 and the external thread 4.
  • the storage space 17 can be formed by omitting one or more threads in the internal and / or external threads 2, 4.
  • the storage space 17 can also be formed subsequently, for example by screwing in an annular groove.
  • the storage space 17 enables excess thread sealant to be pressed into this storage space 17 when the screw connection is tightened.
  • the storage space 17 is completely filled with thread sealant.
  • Figure 4 shows a further embodiment of a screw connection.
  • the thread flanks 10 of the external thread 4 have in a second section 8, based on the flank height in a first section 7, a reduced flank height.
  • individual cavities 12 are formed between the core diameter of the internal thread 2 and the reduced thread flanks of the external thread 4.
  • These cavities 12 are completely filled with a thread sealant 6.
  • the tightening force F of the screw connection is transmitted exclusively in the contact area between the thread flanks of the internal and external threads 2, 4. This contact area is essentially free of thread sealant 6, so that the screw connection is not set.
  • the sealing of the screw connection and the power transmission are taken over by two largely independent thread areas.
  • Thread sealant which is still in the contact area of the thread flanks during assembly of the screw connection, is pressed into the cavities 12 by the tightening force F.
  • the thread sealant 6 is preferably applied only in the second section 8 of the screw connection prior to assembly
  • FIG. 5 shows a further exemplary embodiment. a screw connection.
  • the same idea is followed as in the exemplary embodiment according to FIG. 4.
  • the thread flanks 11 of the internal thread 2 are reduced in a second section 8, based on the thread flanks 10 in a first section 7 , By reducing the flank height in the second section 8, individual cavities 12 are formed between the core diameter of the external thread 4 and the reduced thread flanks of the internal thread 2. These cavities 12 are again completely filled with a thread sealant 6 and take over the sealing function of the screw connection.
  • the exemplary embodiments according to FIGS. 4 and 5 have the advantage that the force transmission takes place over the entire thread length and not only in a first section 7.
  • the contact area between the thread flanks 10, 11 of the internal and external threads in the second section 8 is somewhat reduced compared to the first section 7.
  • the reduced flank height can be easily produced, for example by turning on a CNC machine, without incurring additional costs.
  • the flank height can also be reduced subsequently, for example by turning off the outer diameter or the inner diameter.
  • Figure 6 shows a last embodiment of the invention.
  • at least one thread of the external thread 4 has a smaller pitch than the other threads of the external thread 4.
  • the threads of the external thread 4 are subsequently offset in the axial direction in relation to the threads of the internal thread 2.
  • Two different thread sections are formed. In a first section 7, the thread flanks 10, 11 have direct contact with one another. The tightening force is transmitted via the contact surfaces of the thread flanks. In a second section 8, which begins with the thread with the smaller pitch, there is no direct contact between the thread flanks 10 of the external thread 4 and. the thread flanks 11 of the internal thread 2. The offset of the external thread creates a continuous cavity 12 in the second section.
  • the cavity 12 is completely filled with thread sealant and thus ensures a secure seal of the screw connection.
  • the power transmission of the screw connection takes place essentially through the first section 7, in which the thread flanks 10 of the external thread 4 have direct contact with the thread flanks 11 of the internal thread 2.
  • at least one thread 16 of the internal thread 2 has a larger pitch than the other threads of the internal thread.
  • the threads of the internal thread 2 are offset in the axial direction in relation to the threads of the external thread 4 in the second section 8, so that again in the second section 8 between the thread flanks 11 of the internal thread 2 and the thread flanks 10 of the external thread 4 a continuous one Cavity results.
  • the thread pitch can be changed easily, for example by turning on a CNC-controlled machine tool, without incurring additional costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

L'invention concerne un accouplement par vis comprenant au moins un premier élément (1) comportant un taraudage (2) vissé sur un deuxième élément (3) pourvu d'un filetage correspondant (4). Cet accouplement s'utilise afin de transmettre une puissance de serrage (F). Des produits d'étanchéité (6) sont introduits entre le taraudage et le filetage, ce qui permet de sceller l'accouplement par vis.
EP05701543A 2004-02-20 2005-01-19 Accouplement par vis Withdrawn EP1716340A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004008477A DE102004008477B4 (de) 2004-02-20 2004-02-20 Schraubverbindung
PCT/EP2005/050196 WO2005080805A1 (fr) 2004-02-20 2005-01-19 Accouplement par vis

Publications (1)

Publication Number Publication Date
EP1716340A1 true EP1716340A1 (fr) 2006-11-02

Family

ID=34832891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05701543A Withdrawn EP1716340A1 (fr) 2004-02-20 2005-01-19 Accouplement par vis

Country Status (6)

Country Link
US (1) US20070134074A1 (fr)
EP (1) EP1716340A1 (fr)
JP (1) JP2007522411A (fr)
CN (1) CN1922407A (fr)
DE (1) DE102004008477B4 (fr)
WO (1) WO2005080805A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009035062A1 (fr) * 2007-09-10 2009-03-19 Nec Corporation Dispositif d'emballage d'un échantillon
US9033631B2 (en) * 2009-04-17 2015-05-19 United Technologies Corporation High temperature thread locking compound
FR2962405B1 (fr) * 2010-07-06 2013-06-07 Airbus Operations Sas Aeronef comprenant une pompe de carburant fixee a un panneau de reservoir
CN102619840A (zh) * 2012-04-01 2012-08-01 西南石油大学 一种快速连接阶梯螺纹结构
CN103115061B (zh) * 2012-12-08 2014-11-26 宁波市鄞州云帆工程咨询有限公司 机动车专用防松动螺母
US20150014365A1 (en) * 2013-07-09 2015-01-15 Jar-With-A-Twist Llc Food dispensing jar
CN109083919A (zh) * 2018-10-18 2018-12-25 湘电风能有限公司 一种螺纹连接副防松密封装置及方法

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DE2238673A1 (de) * 1972-08-05 1974-02-21 Klueber Lubrication Rohrfitting fuer wasserleitungen und sanitaerinstallationen und verfahren zum abdichten von rohrverbindungen bei derartigen leitungen
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Also Published As

Publication number Publication date
WO2005080805A1 (fr) 2005-09-01
US20070134074A1 (en) 2007-06-14
DE102004008477A1 (de) 2005-09-08
JP2007522411A (ja) 2007-08-09
DE102004008477B4 (de) 2006-03-16
CN1922407A (zh) 2007-02-28

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