EP2148392A1 - Vis de serrage - Google Patents

Vis de serrage Download PDF

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Publication number
EP2148392A1
EP2148392A1 EP09290061A EP09290061A EP2148392A1 EP 2148392 A1 EP2148392 A1 EP 2148392A1 EP 09290061 A EP09290061 A EP 09290061A EP 09290061 A EP09290061 A EP 09290061A EP 2148392 A1 EP2148392 A1 EP 2148392A1
Authority
EP
European Patent Office
Prior art keywords
ball
clamping screw
recess
conductor
screw
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.)
Ceased
Application number
EP09290061A
Other languages
German (de)
English (en)
Inventor
Gert Stauch
Peter Grötsch
Volker Markgraf
Jürgen KRAUSS
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.)
Nexans SA
Original Assignee
Nexans SA
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
Application filed by Nexans SA filed Critical Nexans SA
Priority to EP09290061A priority Critical patent/EP2148392A1/fr
Publication of EP2148392A1 publication Critical patent/EP2148392A1/fr
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
    • H01R4/366—Conductive members located under tip of screw with intermediate part between tip and conductive member intermediate part attached to the tip of the screw

Definitions

  • the invention relates to a clamping screw for fastening an electrical conductor in a metallic clamp designed as a pipe section, which has in its wall at least one threaded through hole for receiving the clamping screw, in which serving in a recess on the voltage applied to the electrical conductor End face of the clamping screw a ball is attached ( DE 1 902 067 U ).
  • the contact pressure with which a clamping screw presses in the assembled state against an electrical conductor should be as large as possible and remain intact, so that a stable electrical connection between electrical conductors of cables, especially power cables, can be guaranteed throughout the required life. Due to the friction between the clamping screw and the thread of the through hole of the clamp and the friction of the end face of the clamping screw when tightening the same on the surface of the conductor, an increased force is required to rotate the clamping screw. As a result, the force with which the clamping screw presses on the conductor may be too low for a sufficient contact reliability for a long time.
  • a clamping screw is known, on the front side of which is designed as a disc clamping piece section, which is offset by a lateral groove to form a predetermined breaking point all around with respect to the clamping screw.
  • the clamping screw can rotate relative to the disc, which is then pressed only without its own rotation in the axial direction of the clamping screw on the head.
  • the disc is rotated with the clamping screw and thereby moved or rotated on the conductor. This can lead to undefined damage to the conductor.
  • the relatively large-area disc does not allow a high contact pressure in the interior of the conductor, especially in the case of stranded conductors with a large cross-section.
  • the invention has for its object to make the above-described clamping screw so that when tightening the same damage to the conductor can be avoided and that they also and especially in stranded conductors produces a long-term high contact pressure.
  • the ball of this clamping screw protrudes constantly and in particular in their working position out of the same and when tightening the same applies solely to the conductor to be fastened.
  • the ball in its dimensions corresponding recess in all directions rotatable, that is freely rotatably mounted, it is initially rotated when tightening the clamping screw with the same. However, only until it rests against the surface of the conductor. Thereafter, the ball is no longer rotated during further rotation of the clamping screw with the same, but pressed in the direction of movement of the clamping screw on and in the head. Damage to the surface of the conductor by a force-twisted part can therefore be excluded.
  • the freely rotatable ball is particularly in stranded conductors with a large cross-section, for example, 2000 mm 2 of great advantage, because when using a clamping screw with such a ball and the individual wires inside the conductor are acted upon. It can be achieved in this way, a very high contact pressure between the clamping screw and conductor, which is maintained over a long time.
  • Fig. 1 is an existing example of a tinned aluminum alloy, designed as a pipe piece terminal 1 shown.
  • the clamp 1 has two threaded holes, in each of which an externally threaded clamping screw 2 is arranged.
  • the electrical conductors 3 and 4 of two electrical cables 5 and 6, which are in particular energy cables. They are fixed in the mounting position by the clamping screws 2 in the terminal 1 and thereby electrically connected to each other.
  • the electrical conductors 3 and 4 are designed in a preferred embodiment as a stranded conductor. They consist in particular of aluminum or copper.
  • the conductors 3 and 4 may also consist of segments in which individual wires are combined.
  • the clamping screw 2 after the FIGS. 2 and 3 has a suitable for applying a screwing screw head 7, a shaft 8, an external thread 9 and a ball 10, which is mounted in an existing at their serving for the conductor 3 and 4, front side recess.
  • the recess is designed for example as a spherical cap, in which the ball 10 is snapped.
  • the ball 10 may also be held, for example by means of an elastomeric ring in the recess at least until it strikes when tightening the clamping screw 2 on one of the conductors 3 or 4.
  • the clear width of the recess corresponds to the dimensions of the ball 10. It is advantageously slightly larger than the ball 10, so that a narrow gap remains between the ball 10 and the wall of the recess. This gap ensures the free mobility of the ball 10 in the clamping screw 2, so that they are in the Recess relative to the same can rotate when pressed against one of the conductors 3 or 4.
  • the ball 10 is advantageously made of the same material as the conductors 3 and 4 to be connected, that is preferably made of aluminum, an aluminum alloy or copper. To ensure their free rotation in the recess of the clamping screw 2 with increased security, a lubricant can be applied to the surface of the ball 10 with advantage. The ball 10 penetrates more or less deeply into the conductor 3 or 4, depending on the force with which the clamping screw 2 is rotated.
  • the clamping screw 2 can according to the 4 and 5 also be designed as a shear screw with at least one, in their axial course attached shearing point or predetermined breaking point. It has according to the drawing a circumferential predetermined breaking point 11 and a second screw head 12 which is effective when the screw head 7 is sheared off at the predetermined breaking point 11.
  • a shear screw can be used to tighten a conventional wrench.
  • the screw head 7 is sheared off when a predetermined torque is reached.
  • the screw head 12 For further tightening the shear screw until it reaches the desired tight fit then the screw head 12 is used.
  • the clamping screw 2 can be tightened with further increased force.
  • This variant of the clamping screw 2 can be used with advantage when a particularly uniform penetration of the same is to be achieved in a conductor.
  • a fitter can first tighten all the existing clamping screws 2 until the first screw head 7 has been sheared off. Thereafter, the clamping screws 2, for example, in the same order as in the first screwing, until the shearing of the second screw head 12 thereof are tightened.
  • the screw heads 7 and 12 are formed in the usual technique, for example as a hexagon.
  • the clamping screw 2 can then be rotated with a conventional wrench.
  • a fixed connection between the conductors 3 and 4 of the two cables 5 and 6 and the tubular terminal 1 is required, in which the conductors are inserted. This can be ensured with advantage by using a so-called torque wrench, which then "twists" when tightening the clamping screw 2, when a sufficient tight fit of the same is achieved.
  • the clamping screw 2 could also have a central polygonal blind hole and then rotated by means of a matching in the blind hole pin with a polygonal cross-section.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Clamps And Clips (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP09290061A 2008-07-25 2009-01-28 Vis de serrage Ceased EP2148392A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09290061A EP2148392A1 (fr) 2008-07-25 2009-01-28 Vis de serrage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08290723 2008-07-25
EP09290061A EP2148392A1 (fr) 2008-07-25 2009-01-28 Vis de serrage

Publications (1)

Publication Number Publication Date
EP2148392A1 true EP2148392A1 (fr) 2010-01-27

Family

ID=40011103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09290061A Ceased EP2148392A1 (fr) 2008-07-25 2009-01-28 Vis de serrage

Country Status (3)

Country Link
US (1) US8079884B2 (fr)
EP (1) EP2148392A1 (fr)
AU (1) AU2009203011B2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2348899A1 (es) * 2010-05-12 2010-12-16 Ridelin S.L. Tornillo de apriete para conector electrico.
EP2487755A1 (fr) * 2011-02-08 2012-08-15 Nexans Vis de serrage
EP2683034A1 (fr) * 2012-07-02 2014-01-08 Nexans Procédé de connexion conductrice d'électricité du conducteur électrique de deux câbles de haute tension
EP3121903A1 (fr) 2015-07-24 2017-01-25 Nexans Systeme dote d'un connecteur pour au moins un cable electrique

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011139915A2 (fr) * 2010-04-29 2011-11-10 Utilx Corporation Connecteurs dotés d'une cavité intérieure à étages
CN102544775A (zh) * 2012-02-28 2012-07-04 吴延书 一种多芯导线电连接方法及固定装置
US9929477B2 (en) * 2015-04-30 2018-03-27 Ilsco Corporation Torque limited screw for electrical connector
US20180026383A1 (en) * 2016-07-19 2018-01-25 Nexans Arrangement with a Connector for at Least One Electrical Cable

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB231923A (en) * 1923-12-13 1925-04-14 Rudolf Woods Improvements in sockets or holders for the thermionic valves of wireless systems and apparatus for telephony and telegraphy
DE1902067U (de) 1964-07-23 1964-10-15 Agalitwerk Milspe Kattwinkel & Schraubklemme mit druckschraube.
NL7304788A (fr) * 1972-04-20 1973-10-23
DE10230502A1 (de) 2002-07-06 2004-01-29 Pfisterer Kontaktsysteme Gmbh & Co. Kg Klemmschraube mit Klemmscheibe
DE202004013761U1 (de) * 2004-09-03 2004-11-04 Electro-Terminal Gmbh & Co Kg Lüsterklemme

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523932A (en) * 1922-06-29 1925-01-20 Mavor & Coulson Ltd Set screw and the like
AU2002331787A1 (en) * 2002-09-03 2004-03-29 Mark Gordon Cone-head thrust screw
US7699669B2 (en) * 2007-08-24 2010-04-20 Ilsco Corporation Screw assembly for electrical connectors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB231923A (en) * 1923-12-13 1925-04-14 Rudolf Woods Improvements in sockets or holders for the thermionic valves of wireless systems and apparatus for telephony and telegraphy
DE1902067U (de) 1964-07-23 1964-10-15 Agalitwerk Milspe Kattwinkel & Schraubklemme mit druckschraube.
NL7304788A (fr) * 1972-04-20 1973-10-23
DE10230502A1 (de) 2002-07-06 2004-01-29 Pfisterer Kontaktsysteme Gmbh & Co. Kg Klemmschraube mit Klemmscheibe
DE202004013761U1 (de) * 2004-09-03 2004-11-04 Electro-Terminal Gmbh & Co Kg Lüsterklemme

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2348899A1 (es) * 2010-05-12 2010-12-16 Ridelin S.L. Tornillo de apriete para conector electrico.
EP2487755A1 (fr) * 2011-02-08 2012-08-15 Nexans Vis de serrage
EP2683034A1 (fr) * 2012-07-02 2014-01-08 Nexans Procédé de connexion conductrice d'électricité du conducteur électrique de deux câbles de haute tension
EP3121903A1 (fr) 2015-07-24 2017-01-25 Nexans Systeme dote d'un connecteur pour au moins un cable electrique

Also Published As

Publication number Publication date
AU2009203011B2 (en) 2015-01-15
AU2009203011A1 (en) 2010-02-11
US20100112873A1 (en) 2010-05-06
US8079884B2 (en) 2011-12-20

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