EP0735614A2 - Douille de contact à vis - Google Patents

Douille de contact à vis Download PDF

Info

Publication number
EP0735614A2
EP0735614A2 EP96103713A EP96103713A EP0735614A2 EP 0735614 A2 EP0735614 A2 EP 0735614A2 EP 96103713 A EP96103713 A EP 96103713A EP 96103713 A EP96103713 A EP 96103713A EP 0735614 A2 EP0735614 A2 EP 0735614A2
Authority
EP
European Patent Office
Prior art keywords
screw
pressure piece
cage
clamping screw
clamping
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.)
Granted
Application number
EP96103713A
Other languages
German (de)
English (en)
Other versions
EP0735614A3 (fr
EP0735614B1 (fr
Inventor
Werner Radde
Klaus Endres
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.)
Weidmueller Interface GmbH and Co KG
Original Assignee
Weidmueller Interface GmbH and Co KG
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 Weidmueller Interface GmbH and Co KG filed Critical Weidmueller Interface GmbH and Co KG
Publication of EP0735614A2 publication Critical patent/EP0735614A2/fr
Publication of EP0735614A3 publication Critical patent/EP0735614A3/fr
Application granted granted Critical
Publication of EP0735614B1 publication Critical patent/EP0735614B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/2458—Electrical interconnections between terminal blocks

Definitions

  • the invention relates to a screw terminal for electrical conductors, with a cage and a rotatably arranged in a threaded portion of the cage clamping screw and with a movably arranged in the cage pressure piece, which is movable by means of the clamping screw against a contact piece that is inclined to the clamping screw axis in one of the conductor receiving space defined in the cage is arranged.
  • the basic structure of such screw terminals is known (DE 6 942 001 U1; DE 4 400 571 A1).
  • the clamping screws are rotatably held and supported in the cage. They are in a form-fitting thread engagement with the pressure piece that can be moved in the cage.
  • This basic structure leads to a complicated construction which is expensive to manufacture, both in the area between the rotary bearing between the screw and the cage, and in particular also in the area of the form-fitting thread engagement between the pressure piece and the clamping screw.
  • the assembly of the affected parts is also complex and requires mechanical use in any case.
  • a screw terminal is specified, which is characterized by a clamping screw rotatably arranged in a threaded section of a screw terminal cage, the longitudinal axis of which is arranged essentially parallel to the insertion direction of a conductor which can be clamped in the screw terminal.
  • the clamping screw When turning, the clamping screw acts on a clamping element with a clamping surface and a pressure surface arranged at an angle to it, which is supported against an abutment arranged on the side of the clamping screw axis, a rotation of the clamping screw resulting in a displacement of the pressure surface of the clamping element, which results from the tilting of the clamping element is caused.
  • the clamping surface By tilting the clamping element, the clamping surface is pressed against the conductor to be clamped and this is fixed in the screw terminal as intended.
  • the clamping element can be pressed against the clamping screw by a spiral spring along the entire path and can thus be moved back into an unloaded position by the spiral spring when the screw clamp is released.
  • this screw terminal has a problem, in particular separate from a housing that changes depending on the application, that the clamping action of this screw terminal cannot meet all requirements due to the shape of the pressure piece and the force transmission by means of a tilting movement.
  • the clamping of the conductor by the pressure piece is essentially parallel to the conductor surface only for a structurally predetermined, very small diameter range of the conductors to be clamped, as a result of which a good clamping effect is generated by large contact areas between the pressure piece and the conductor.
  • the L-shaped pressure piece is predominantly subjected to bending, since due to the spatial arrangement of the clamping screw, pressure piece and conductor, a force deflection around the pivot point of the pressure piece must take place. This does indeed result in a certain elasticity of the conductor clamping reached, but there is no denying the danger of plastic deformation and therefore inadequate clamping action after repeated actuation of the screw terminal.
  • the screw terminal By supporting the additionally provided spring on parts of the cage or the busbar, the screw terminal as an assembly unit is not easy to preassemble.
  • the present invention has for its object to provide a screw terminal of the generic type, which has a very simple structural design with good functional reliability, is easy to assemble and has a safe clamping effect independent of the deformation properties and clamping position of the pressure piece within the screw terminal and conductor diameter.
  • the solution according to the invention consists essentially in that the pressure piece is linearly displaceable by rotating the clamping screw along the longitudinal axis of the clamping screw, and that the pressure piece on the free end of the clamping screw by means of a helical spring supported on the pressure piece and on the cage over the entire travel range of Pressure piece is kept pressed.
  • the construction is further simplified considerably in that the pressure piece can be an easily produced die-cast part without any processing such as thread cutting or the like.
  • this screw terminal as a self-contained, fully assembled connection element can be carried out in a very simple manner, if necessary without mechanical use and also without the use of tools at all. It is sufficient to insert the coil spring and pressure piece into the cage and screw in the clamping screw.
  • the connecting elements formed in this way can be used as desired in socket or pin strips, printed circuit board terminals, feed-through terminals and the like.
  • the longitudinal axis of the coil spring is arranged parallel to the longitudinal axis of the clamping screw, so that the coil spring is only subjected to pressure when the pressure piece is displaced by means of the clamping screw.
  • the cage is designed as a bent sheet metal part in a manner known per se.
  • the threaded section is formed by two overlapping brackets of the cage. The thread is thus advantageously self-locking.
  • the spring is kept inaccessible with respect to the conductor receiving space, so that it is excluded that a conductor which is inserted too far can contact the spring and change its position or even damage it.
  • protective ribs are provided on the pressure piece and / or on the cage, for which free spaces are provided during the relative movement between the pressure piece and the cage.
  • the screw terminal has as essential components a clamping screw 1, a cage 2 and a pressure piece 3.
  • the cage 2 is formed in the illustrated embodiment as a bent sheet metal part that an upper boundary wall 4, side walls 5 and lower, overlapping, oriented obliquely to the axis of the clamping screw 1 Has boundary walls 6.
  • the narrow side walls of the cage 2 are formed on one side adjacent to the upper boundary wall 4 by overlapping brackets 7, in which the thread 8 is located, into which the clamping screw 1 can be screwed.
  • the thread is self-locking due to the formation of the thread in overlapping brackets. Below this bracket 7, this narrow side wall is open and thereby forms the access opening to the conductor receiving space 9 defined by the cage 2.
  • the opposite narrow side wall is formed in the upper area by a bracket 10. Underneath there is an opening reaching to the lower overlapping boundary walls 6, through which a contact piece 11 can be inserted into the conductor receiving space 9 of the cage 2, which is then in Oblique to the axis of the clamping screw 1 rests on the lower overlapping boundary walls 6 of the cage 2.
  • the contact piece 11 is designed in the form of a busbar, which carries, for example, a double flat spring contact 13 on a bend 12 remaining outside the cage 2.
  • the pressure piece 3 is movably arranged in the cage. It is only held non-positively on the free end of the clamping screw 1 by a helical spring 14 which is dimensioned such that the pressure in the entire path area of the pressure piece 3 between the maximum open position (FIG. 1) and the maximum closed position (FIG. 3) is maintained.
  • the coil spring 14 is supported on the one hand on the cage 2, namely here on its bracket 10, and on the other hand on the pressure piece 3.
  • a receiving channel 15 is expediently provided in the pressure piece 3, into which the helical spring can enter.
  • the bracket 10 expediently overlaps the other end of the spring with an angled portion 16 which is approximately rounded in accordance with the spring contour.
  • the longitudinal axis of the coil spring 14 and the longitudinal axis of the clamping screw 1 are offset from one another.
  • the longitudinal axis of the helical spring 14 and thus of the receiving channel 15 is closer to the upper boundary wall 4 of the cage 2 and this creates a permanent tilting moment which keeps the pressure piece 3 pressed slightly against the upper boundary wall 4 of the cage 2 during its movement and thus using the existing wall for a guide of the pressure piece 3 ensures its movement.
  • the coil spring 14 In order to prevent the coil spring 14 from contacting and possibly being damaged with a too deeply inserted conductor to be connected, the coil spring 14 is kept inaccessible with respect to the conductor receiving space 9.
  • the rounded bend 16 serves on the one hand to receive one end of the helical spring 14 and, in cooperation therewith, a protective rib 18 provided on the pressure piece 3, which extends so far that it extends in the maximum open position (FIG. 1) extends with its free end up to the free end of the rounded bend 16.
  • the lower rounded area of the bend 16 and the upper side of the protective rib 18 are kept apart from each other, so that they can move freely past each other without contact.
  • connection element that is very easy to pre-assemble. It is sufficient to insert the spring 14 and the pressure piece 3 into the cage 2 and to screw the clamping screw 1 into the threaded section 8.
  • the contact piece 11 can also be inserted without problems.
  • the arrangement can then be inserted fully assembled in the receiving space of an insulating material housing 19, which is contoured accordingly for receiving the affected parts.
  • it is an insulating material housing of a component of a socket strip. It can also be the housing of PCB terminals, feed-through terminals and other electrical connectors.
  • a space 20 is also provided in the insulating housing 19 for receiving the free end of the protective rib 18 of the pressure piece 3 in the maximum closed position of the screw terminal.
  • An insertion funnel 21 is formed in the insulating housing 19 below the receiving area for the clamping screw 1, through which an electrical conductor to be clamped can be inserted into the conductor receiving space 9 inside the cage 2.
  • the inserted conductor is clamped in the closed position of the screw terminal by means of the clamping screw 1 from the pressure piece 3 on the contact piece 11.
EP96103713A 1995-04-01 1996-03-09 Douille de contact à vis Expired - Lifetime EP0735614B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19512337 1995-04-01
DE19512337A DE19512337A1 (de) 1995-04-01 1995-04-01 Schraubklemme für elektrische Leiter

Publications (3)

Publication Number Publication Date
EP0735614A2 true EP0735614A2 (fr) 1996-10-02
EP0735614A3 EP0735614A3 (fr) 1998-02-11
EP0735614B1 EP0735614B1 (fr) 2001-10-10

Family

ID=7758591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103713A Expired - Lifetime EP0735614B1 (fr) 1995-04-01 1996-03-09 Douille de contact à vis

Country Status (3)

Country Link
EP (1) EP0735614B1 (fr)
AT (1) ATE206846T1 (fr)
DE (2) DE19512337A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119307A1 (fr) * 2007-04-03 2008-10-09 Siemens Aktiengesellschaft Dispositif serre-fil destiné à un conducteur électrique, en particulier à un conducteur électrique avec cosse
DE102009007073A1 (de) 2009-02-02 2010-08-12 Siemens Aktiengesellschaft Elektrisch leitender Schraubanschluss
EP4287411A1 (fr) 2022-06-01 2023-12-06 Siemens Aktiengesellschaft Pièce de protection pour sous-fiche

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008010162A1 (de) * 2008-02-20 2009-09-03 Phoenix Contact Gmbh & Co. Kg Elektrische Anschlusseinrichtung
DE102021108317A1 (de) 2021-04-01 2022-10-06 Phoenix Contact Gmbh & Co. Kg Klemme zum Anschluss eines elektrischen Leiters

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100123B (de) * 1955-01-07 1961-02-23 Dr Friedrich Wieland Klemme fuer elektrische Leiter
DE6942001U (de) * 1969-10-27 1970-02-05 Weidmueller Kg C Schraubklemme fuer elektrische leitungen
DE2107218A1 (de) * 1971-02-16 1972-08-24 Siemens Ag Elektrisches Installationsgerät
DE8534698U1 (de) * 1984-12-12 1986-02-06 CGEE-Alsthom, Levallois-Perret Schraubklemme
EP0263390A2 (fr) * 1986-10-04 1988-04-13 Asea Brown Boveri Aktiengesellschaft Borne à vis
DE4328928A1 (de) * 1993-08-27 1995-03-02 Contact Gmbh Kontakt- und Klemmvorrichtung für elektrische Steckverbinder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE792897A (fr) * 1971-12-31 1973-06-18 Alsthom Cgee Borne electrique a serrage par vis a raccordement axial
US5292263A (en) * 1993-01-12 1994-03-08 The Whitaker Corporation Electrical connector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100123B (de) * 1955-01-07 1961-02-23 Dr Friedrich Wieland Klemme fuer elektrische Leiter
DE6942001U (de) * 1969-10-27 1970-02-05 Weidmueller Kg C Schraubklemme fuer elektrische leitungen
DE2107218A1 (de) * 1971-02-16 1972-08-24 Siemens Ag Elektrisches Installationsgerät
DE8534698U1 (de) * 1984-12-12 1986-02-06 CGEE-Alsthom, Levallois-Perret Schraubklemme
EP0263390A2 (fr) * 1986-10-04 1988-04-13 Asea Brown Boveri Aktiengesellschaft Borne à vis
DE4328928A1 (de) * 1993-08-27 1995-03-02 Contact Gmbh Kontakt- und Klemmvorrichtung für elektrische Steckverbinder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119307A1 (fr) * 2007-04-03 2008-10-09 Siemens Aktiengesellschaft Dispositif serre-fil destiné à un conducteur électrique, en particulier à un conducteur électrique avec cosse
DE102009007073A1 (de) 2009-02-02 2010-08-12 Siemens Aktiengesellschaft Elektrisch leitender Schraubanschluss
EP4287411A1 (fr) 2022-06-01 2023-12-06 Siemens Aktiengesellschaft Pièce de protection pour sous-fiche
DE102022205610A1 (de) 2022-06-01 2023-12-07 Siemens Aktiengesellschaft Untersteckschutzteil

Also Published As

Publication number Publication date
EP0735614A3 (fr) 1998-02-11
EP0735614B1 (fr) 2001-10-10
ATE206846T1 (de) 2001-10-15
DE59607856D1 (de) 2001-11-15
DE19512337A1 (de) 1996-10-02

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