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EP2424045B1 - Installation device with a connection clamp assembly - Google Patents

Installation device with a connection clamp assembly Download PDF

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Publication number
EP2424045B1
EP2424045B1 EP11005495.4A EP11005495A EP2424045B1 EP 2424045 B1 EP2424045 B1 EP 2424045B1 EP 11005495 A EP11005495 A EP 11005495A EP 2424045 B1 EP2424045 B1 EP 2424045B1
Authority
EP
European Patent Office
Prior art keywords
switching device
service switching
thread
screw
connecting plate
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.)
Active
Application number
EP11005495.4A
Other languages
German (de)
French (fr)
Other versions
EP2424045A3 (en
EP2424045A2 (en
Inventor
Joachim Majewski
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.)
ABB AG Germany
Original Assignee
ABB AG Germany
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Filing date
Publication date
Application filed by ABB AG Germany filed Critical ABB AG Germany
Publication of EP2424045A2 publication Critical patent/EP2424045A2/en
Publication of EP2424045A3 publication Critical patent/EP2424045A3/en
Application granted granted Critical
Publication of EP2424045B1 publication Critical patent/EP2424045B1/en
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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
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
    • H01R4/44—Clamping areas on both sides of screw
    • 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
    • H01R4/34—Conductive members located under head of screw

Definitions

  • the invention relates to a service switching device with an insulating material housing and with a connection arrangement for clamping a connection conductor, wherein the connection arrangement comprises a connection conductor with an annular clamping shoe and a device-mounted connection plate and a threaded element and a clamping screw, which has a screw head and a screw shaft, wherein the screw shaft when clamping the terminal lead, penetrates the annular terminal shoe and threadably engages the threaded member, and a terminal receiving space having an insertion opening for the terminal lead and an access opening to the screw head for operating the same.
  • the terminal assembly is specially designed to connect a connecting conductor with a so-called annular clamping shoe, in particular with a clamping shoe with a closed ring.
  • annular clamping shoe In the annular clamping shoe so there is a hole through which the clamping screw is guided during clamping.
  • the DE 78 27 465 U1 shows a screw terminal, which consists of a rigid contact piece, which can be attached via a tongue. Furthermore, the screw connection contact has a clamping screw and a clamping plate. The wire end pieces of conductors to be clamped are clamped between the contact piece and the clamping plate. The thread for the clamping screw is located in the clamping plate.
  • the DE 10 2007 039 709 A1 shows a generic service switching device in which the threaded element, with which the screw shaft is engaged, is designed as a threaded bore in the connection plate.
  • the clamping screw is bolted directly to the connection plate there.
  • the connection plate must be made correspondingly thick and stable, so that they can also accommodate a larger torque when tightening the clamping screw, without warping or without the thread breaking out. This requires higher material costs and a more complex production.
  • connection plate has a holding section which locks the threaded element.
  • the threaded element is inventively designed as a separate part, regardless of the connection plate, for example as a mother.
  • the connection plate itself has no thread for the clamping screw, but only a through-hole, through which the screw shank of the clamping screw can be inserted in order to then screw it to the threaded element.
  • the threaded member is held in position by the retaining portion on the terminal plate. The tightening torque of the clamping screw is thus taken over the holding part of the terminal plate, the housing parts of the service switching device are not charged.
  • the holding section can be designed so that it distributes the tightening force of the clamping screw as wide as possible on the cross section of the connection plate, so that local force peaks avoided and thus the risk of distortion of the connection plate is reduced. Since the connection plate itself is designed without its own thread, it can be made of a high-quality metal with high current conductivity, at -
  • the terminal receiving space on a first recess with boundary walls for receiving the threaded element facilitates insertion of the threaded member and allows the threaded member to be inserted independently of the lead and prior to feeding the lead and held in the terminal receiving space.
  • the special housing contour of the franking prevents the threaded element applying all the force when tightening the clamping screw on the housing parts, since the threaded element itself is always locked by the metal holding section on the connection plate and not by a housing part and thus a larger torque without a excessive housing load can be achieved.
  • the one or more holding portions is an L-shaped or U-shaped integrally formed on the free end of the connecting plate web.
  • the holding portion is an integrally formed on the terminal plate end portion with a second recess for locking receiving the threaded element.
  • the threaded element is a nut with internal thread, in particular a square nut.
  • the FIG. 1 shows schematically and as a partial section of an installation switching device 1, which has an insulating material 2.
  • the FIG. 2 shows a detailed view of the terminal receiving space of the embodiment according to FIG. 1 ,
  • the service switching device 1 is for example a circuit breaker.
  • Its insulating housing comprises a front and rear front 3,4, a front and rear narrow side 5,6 and a mounting side 7.
  • a terminal receiving space 10 is provided in the housing 2, in which a terminal assembly 11 is housed.
  • the terminal receiving space 10 is accessible at the rear narrow side 6 through an insertion opening 27 for a terminal conductor 12 and at the rear front side 4 through an access opening 28 for an actuating tool, such as a screwdriver 22.
  • the terminal conductor 12 which carries an annular clamping shoe 14 with a central opening 13, screwed by a clamping screw 15 to a connection plate 16.
  • the clamping screw 15 has a screw head 17 designed in the form of an elongate cylinder and a shaft 18.
  • the shaft 18 carries an external thread 19.
  • a slot 21 for receiving the operating tool, such as a screwdriver 22, is provided.
  • connection plate 16 carries a hole 23. It is aligned approximately parallel to the rear front side 4.
  • the connection plate 16 is integrally formed on a discharge bar 37, to which further, in the interior of the service switching device 1 outgoing conductor can be connected.
  • these are not shown here, as well as all other required for operating a service switching device other components and assemblies, such as a thermal and electromagnetic release, a derailleur, a lever with a contact point, an arc extinguishing system, etc.
  • the discharge bar 37 and the connection plate 16 are fixedly mounted in the housing 2 of the service switching device 1 by web-like housing projections 32.
  • the clamping screw 15 is guided in an approximately cylindrical guide channel 24 in the terminal receiving space 10.
  • the guide channel 24 extends approximately parallel to the rear narrow side 6, so that the clamping screw 15 is guided by him perpendicular to the hole 23 in the connection plate 16 out.
  • the clamping screw 15 is shown in a Aufsetzwolf, that is, the free end of the screw shaft 18 is located just at the height of the hole 23. In this position, the annular clamping shoe 14 can not be inserted into the terminal receiving space 10, since it from the screw shaft 18th would be blocked. Before inserting the clamping shoe, the clamping screw 15 must be lifted so far in the direction of arrow P upwards from the connection plate 16, that at least the thickness of the clamping shoe 14 corresponding space between the free end of the shaft 18 and the connection plate 16 is opened so that then the Clamping shoe 14 can be inserted through the insertion opening 27 until its opening 13 comes to lie exactly above the hole 23.
  • the Ableitschiene 37 comes here as the second function of the Ein Siliconstops for the clamping shoe 14, thereby avoiding too far insertion of the clamping shoe and thus the assembly of the connecting conductor 12 is further facilitated.
  • the screw head 17 carries in its upper part an external thread 38.
  • On the inner wall of the guide channel 24 is an internal thread 39 or a housing contour, so a partial thread, introduced with threading. This starts in the lower part of the guide channel 24, see Fig. 2 .
  • the clamping screw 15 When the clamping screw 15 is moved from above in the direction of the hole 23 in the connection plate 16, it slides first in the upper portion of the guide channel 24 along the inner wall along, and in the lower part it engages with its external thread rotation in the Internal thread 39 a. The further movement of the clamping screw 15 can then be done only by turning and corresponding screw in the internal thread 39. As a result, a centered guidance of the clamping screw on the hole 23 is ensured.
  • the undercut 40 may be formed as an annular bead or a cross-sectional constriction of the guide channel 24 upwards.
  • the reduced by the undercut 40 cross-sectional area of the guide channel 24 is still so large that a screwdriver 22 can be carried out to actuate the clamping screw 15, but it is smaller than the cross section of the screw head, so that this somewhat captive in the guide channel 24 is caught. If the clamping screw 15 has pushed after unscrewing from the internal thread 39 upwards into the guide channel 24, the open position of the screw is reached. In this position, the clamping screw 25 has no threaded engagement and can not exert destructive pressure on the housing when turning the screw and automatically ensures the mounting position of the connecting conductor.
  • a threaded member 50 On the clamping screw 15 opposite side of the connection plate 16 is a threaded member 50, here in the form of a square nut, with a threaded hole and an internal thread.
  • the screw Upon further rotation of the clamping screw 15, the screw is guided through the hole 23 by a centered guide and the threaded engagement between the external thread 19 on the shaft 18 and the internal thread of the threaded element 50 is automatically achieved.
  • the clamping screw 15 is further drawn in further rotation in the threaded member 50, until the clamping shoe 14 is clamped between the screw head 17 and the terminal plate 16. In this way, a solid screw with a good surface contact can be produced.
  • the terminal receiving space 10 has a first recess 52 with boundary walls 55 for receiving the threaded element 50. This facilitates insertion of the threaded member 50 and allows the threaded member 50 to be inserted independently of the lead and prior to feeding the lead and held in the terminal receiving space. However, the threaded element 50 is not held captive lock by the boundary walls 55 of the first recess 52 when the clamping screw 15 is screwed and a tightening torque is applied to the threaded member 50, whereby the threaded member 50 will rotate in the first recess 52.
  • connection plate 16 has at its free end an L-shaped integrally formed web 51, which serves as a holding portion 51 for locking the threaded element, ie the square nut 50.
  • the threaded member 50 is held by the holding portion 51 on the terminal plate 16 in its position.
  • the tightening torque of the clamping screw 15 is thus received on the holding part 51 of the terminal plate 16, the housing parts of the service switching device are not charged.
  • FIG. 4 shows that the boundary wall 55 of the first recess 52 has a clearance 53 toward the threaded member 50, so that the threaded member 50 is rotatably received in the first recess 52, wherein the rotation angle limited by the arresting concerns on the holding portion 51 of the terminal plate 16 is.
  • the boundary wall 55 is formed in its cross section approximately like a roof with sloping roof surfaces.
  • the square nut 50 can rotate around the top of the roof into the clearances 53 formed between the sloping roof surfaces and the sidewalls of the square nut. However, before the side wall of the square nut 50 comes to rest on one of the sloping roof surfaces, the further rotation of the square nut 50 is blocked by engagement with the holding section 51.
  • the holding section 51 ' is an end section 56 integrally formed on the connecting plate 16 and having a second recess 54 for arresting the threaded element.
  • the end portion 56 has approximately a U-shape, and the square nut 50 is held arresting between the two longitudinal legs of the U-shape.
  • the terminal plate with the U-shaped end portion or the L-shaped web can be made using a low-cost threaded element, such as a low-cost square nut 50, without a separate thread, a low material thickness (cost savings) of a high-quality metal (eg copper) is good Current conductivity and tightening torque of the clamping screw 15 possible.
  • a low-cost threaded element such as a low-cost square nut 50
  • a low material thickness (cost savings) of a high-quality metal eg copper
  • the threaded member 50 has over the holding portion 51, 5 'a slight backlash, and can be easily screwed by the play of the threaded member in the U- or L-shape and also remains due to tolerance-related axial offset of Clamping screw 15 and the threaded hole in the threaded member 50 easy to use.
  • U or L shape of the holding portion 51, 51 'of the terminal plate 16 is that no cross-sectional reduction of the metal (e.g., locking holes or fixing tabs for holding the threaded member) becomes necessary. This has a positive effect on tightening torques and the current conductivity.
  • the entire terminal assembly 11 can also be inexpensively preassembled in a rational production before installation in the device.
  • connection plate 16 is arranged in the housing such that the holding section 51, 51 'comes to rest in the vicinity of the rear narrow side 6 and is accessible from the outside for contacting for test or calibration purposes by means of a test probe through a test opening 36.
  • the present invention also encompasses any combinations of preferred embodiments as well as individual design features or developments, provided that they are not mutually exclusive.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Description

Die Erfindung betrifft ein Installationsschaltgerät mit einem Isolierstoffgehäuse und mit einer Anschlussklemmenanordnung zum Anklemmen eines Anschlussleiters, wobei die Anschlussklemmenanordnung einen Anschlussleiter mit einem ringförmigen Klemmenschuh und eine im Geräteinneren gelagerte Anschlussplatte und ein Gewindeelement und eine Klemmschraube, welche einen Schraubenkopf und einen Schraubenschaft aufweist, wobei der Schraubenschaft beim Anklemmen des Anschlussleiters den ringförmigen Klemmenschuh durchdringt und mit dem Gewindeelement im Gewindeeingriff steht, und einen Klemmenaufnahmeraum mit einer Einführöffnung für den Anschlussleiter und mit einer Zugangsöffnung zum Schraubenkopf zu dessen Betätigung.The invention relates to a service switching device with an insulating material housing and with a connection arrangement for clamping a connection conductor, wherein the connection arrangement comprises a connection conductor with an annular clamping shoe and a device-mounted connection plate and a threaded element and a clamping screw, which has a screw head and a screw shaft, wherein the screw shaft when clamping the terminal lead, penetrates the annular terminal shoe and threadably engages the threaded member, and a terminal receiving space having an insertion opening for the terminal lead and an access opening to the screw head for operating the same.

Bei gattungsgemäßen Installationsschaltgeräten handelt es sich beispielsweise um Leitungsschutzschalter, Motorschutzschalter oder Fehlerstromschutzschalter, deren Anschlussklemmenanordnung speziell dazu ausgebildet ist, um einen Anschlussleiter mit einem sogenannten ringförmigen Klemmschuh, insbesondere mit einem Klemmschuh mit einem geschlossenen Ring, anzuschließen. In dem ringförmigen Klemmschuh befindet sich also ein Loch, durch das hindurch beim Festklemmen die Klemmschraube geführt wird..In generic service switching devices are, for example, circuit breaker, motor protection switch or residual current circuit breaker, the terminal assembly is specially designed to connect a connecting conductor with a so-called annular clamping shoe, in particular with a clamping shoe with a closed ring. In the annular clamping shoe so there is a hole through which the clamping screw is guided during clamping.

Die DE 78 27 465 U1 zeigt einen Schraubenanschlusskontakt, der aus einem starren Kontaktstück besteht, das über eine Steckzunge befestigt werden kann. Weiter hat der Schraubenanschlusskontakt eine Klemmschraube und eine Klemmplatte. Die Aderendstücke von anzuklemmenden Leitern werden zwischen dem Kontaktstück und der Klemmplatte festgeklemmt. Das Gewinde für die Klemmschraube befindet sich in der Klemmplatte.The DE 78 27 465 U1 shows a screw terminal, which consists of a rigid contact piece, which can be attached via a tongue. Furthermore, the screw connection contact has a clamping screw and a clamping plate. The wire end pieces of conductors to be clamped are clamped between the contact piece and the clamping plate. The thread for the clamping screw is located in the clamping plate.

Die DE 10 2007 039 709 A1 zeigt ein gattungsgemäßes Installationsschaltgerät, bei dem das Gewindeelement, mit dem der Schraubenschaft in Eingriff steht, als Gewindebohrung in der Anschlussplatte ausgeführt ist. Die Klemmschraube wird dort direkt mit der Anschlussplatte verschraubt. Dabei muss die Anschlussplatte entsprechend dick und stabil ausgeführt sein, damit sie auch ein größeres Anzugsmoment beim Festdrehen der Klemmschraube aufnehmen kann, ohne sich zu verziehen beziehungsweise ohne dass das Gewinde ausbricht. Dies erfordert höhere Materialkosten und eine aufwändigere Fertigung.The DE 10 2007 039 709 A1 shows a generic service switching device in which the threaded element, with which the screw shaft is engaged, is designed as a threaded bore in the connection plate. The clamping screw is bolted directly to the connection plate there. The connection plate must be made correspondingly thick and stable, so that they can also accommodate a larger torque when tightening the clamping screw, without warping or without the thread breaking out. This requires higher material costs and a more complex production.

In der DE 695 16 034 T2 ist ein gattungsgemäßes Installationsschaltgerät gezeigt, bei dem das Gewindeelement als eine Mutter ausgebildet ist, die in einer Mutteraufnahmeaussparung in dem Gehäuse gehalten ist. Hier erfolgt also die Verschraubung der Klemmschraube mit einem zusätzlichen Teil, einer Mutter, und nicht direkt mit der Anschlussplatte. Doch bringt dabei beim Festziehen der Klemmschraube die Mutter die gesamte Kraft auf die Gehäuseteile auf, in denen die Mutter arretierend gelagert ist. Es kann dabei zu einer übergroßen Gehäusebelastung und zum Verzug bis zum Ausbrechen von Gehäuseteilen kommen. EP 068 1342 zeigt ein Installationsschaltgerät nach dem Oberbegriff von Anspruch 1. Es ist daher die Aufgabe der vorliegenden Erfindung, ein gattungsgemäßes istallationsschaltgerät so weiterzuentwickeln, dass bei einfacher und fertigungsfreundlicher Gestaltung der Anschlussplatte beim Anziehen der Klemmschraube zum Zwecke des Anschlusses eines Anschlussleiters mit ringförmigem Klemmenschuh eine Belastung des Gehäuses vermieden ist.In the DE 695 16 034 T2 a generic service switching device is shown in which the threaded element is formed as a nut which is held in a nut receiving recess in the housing. So here is the screwing of the clamping screw with an additional part, a nut, and not directly to the terminal plate. However, when tightening the clamping screw, the nut puts all the force on the housing parts in which the nut is mounted arresting. It can lead to an oversized housing load and distortion until breaking out of housing parts. EP 068 1342 shows an installation switching device according to the preamble of claim 1. It is therefore an object of the present invention to develop a generic istallationsschaltgerät so that with simple and production-friendly design of the terminal plate when tightening the clamping screw for the purpose of connecting a terminal conductor with an annular terminal shoe load on the housing is avoided.

Die Aufgabe wird gelöst durch ein gattungsgemäßes Installationsschaltgerät mit den kennzeichnenden Merkmalen des Anspruchs 1.The object is achieved by a generic service switching device with the characterizing features of claim 1.

Erfindungsgemäß also hat die Anschlussplatte einen Halteabschnitt, der das Gewindeelement arretiert. Das Gewindeelement ist erfindungsgemäß als separates Teil, unabhängig von der Anschlussplatte ausgeführt, beispielsweise als Mutter. Die Anschlussplatte selbst hat kein Gewinde für die Klemmschraube, sondern nur ein Durchsteckloch, durch das hindurch der Schraubenschaft der Klemmschraube gesteckt werden kann, um ihn dann mit dem Gewindeelement zu verschrauben. Das Gewindeelement wird durch den Halteabschnitt an der Anschlussplatte in seiner Position gehalten. Das Anzugsmoment der Klemmschraube wird also über das Halteteil von der Anschlussplatte aufgenommen, die Gehäuseteile des Installationsschaltgerätes werden nicht belastet. Der Halteabschnitt kann so gestaltet werden, dass er die Anzugskraft der Klemmschraube möglichst breit auf den Querschnitt der Anschlussplatte verteilt, so dass lokale Kraftspitzen vermieden und damit die Gefahr eines Verzuges der Anschlussplatte verringert ist. Da die Anschlussplatte selbst ohne eigenes Gewinde ausgeführt ist, kann sie aus einem hochwertigen Metall mit hoher Stromleitfähigkeit, bei -According to the invention, the connection plate has a holding section which locks the threaded element. The threaded element is inventively designed as a separate part, regardless of the connection plate, for example as a mother. The connection plate itself has no thread for the clamping screw, but only a through-hole, through which the screw shank of the clamping screw can be inserted in order to then screw it to the threaded element. The threaded member is held in position by the retaining portion on the terminal plate. The tightening torque of the clamping screw is thus taken over the holding part of the terminal plate, the housing parts of the service switching device are not charged. The holding section can be designed so that it distributes the tightening force of the clamping screw as wide as possible on the cross section of the connection plate, so that local force peaks avoided and thus the risk of distortion of the connection plate is reduced. Since the connection plate itself is designed without its own thread, it can be made of a high-quality metal with high current conductivity, at -

spielsweise Kupfer, aber geringer Materialstärke hergestellt sein, was wegen des dadurch verringerten Materialbedarfs zu verringerten Kosten führt, wobei wegen des getrennt ausgeführten Gewindeelements dennoch ein hohes Anzugsmoment der Klemmschraube möglich ist.For example, copper, but low material thickness to be made, which leads to reduced costs because of the reduced material requirements, with a high tightening torque of the clamping screw is still possible due to the separately executed threaded element.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung weist der Klemmenaufnahmeraum eine erste Aussparung mit Begrenzungswänden für die Aufnahme des Gewindeelementes auf. Dies erleichtert das Einsetzen des Gewindeelements und ermöglicht es, dass das Gewindeelement unabhängig von dem Anschlussleiter und schon vor dem Zuführen des Anschlussleiters eingesetzt und in dem Klemmenaufnahmeraum gehalten werden kann.According to an advantageous embodiment of the invention, the terminal receiving space on a first recess with boundary walls for receiving the threaded element. This facilitates insertion of the threaded member and allows the threaded member to be inserted independently of the lead and prior to feeding the lead and held in the terminal receiving space.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung weist die Begrenzungswand der ersten Aussparung eine Freimachung zu dem Gewindeelement hin auf, so dass das Gewindeelement in der Aussparung drehbeweglich aufgenommen ist, wobei der Drehwinkel durch das arretierende Anliegen an dem Halteabschnitt der Anschlussplatte begrenzt ist. Durch die spezielle Gehäusekontur der Freimachung wird verhindert, dass das Gewindeelement die gesamte Kraft beim Festschrauben der Klemmschraube auf die Gehäuseteile aufbringt, da das Gewindeelement selbst immer von dem metallenen Halteabschnitt an der Anschlussplatte und nicht von einem Gehäuseteil arretiert wird und somit ein größeres Anzugsmoment ohne eine übermäßige Gehäusebelastung erreicht werden kann.According to an advantageous embodiment of the invention, the boundary wall of the first recess on a clearance to the threaded element out, so that the threaded member is rotatably received in the recess, wherein the angle of rotation is limited by the arresting concerns on the holding portion of the connection plate. The special housing contour of the franking prevents the threaded element applying all the force when tightening the clamping screw on the housing parts, since the threaded element itself is always locked by the metal holding section on the connection plate and not by a housing part and thus a larger torque without a excessive housing load can be achieved.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist der oder die Halteabschnitte ein L-förmig oder U-förmig an dem freien Ende der Anschlussplatte angeformter Steg.According to an advantageous embodiment of the invention, the one or more holding portions is an L-shaped or U-shaped integrally formed on the free end of the connecting plate web.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist der Halteabschnitt ein an die Anschlussplatte angeformter Endabschnitt mit einer zweiten Aussparung zur arretierenden Aufnahme des Gewindeelements ist.According to an advantageous embodiment of the invention, the holding portion is an integrally formed on the terminal plate end portion with a second recess for locking receiving the threaded element.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist das Gewindeelement eine Mutter mit Innengewinde, insbesondere eine Vierkantmutter.According to an advantageous embodiment of the invention, the threaded element is a nut with internal thread, in particular a square nut.

Weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung und weitere Vorteile sind den Unteransprüchen zu entnehmen.Further advantageous embodiments and improvements of the invention and further advantages can be taken from the subclaims.

Anhand der Zeichnungen, in denen zwei Ausführungsbeispiele der Erfindung dargestellt sind, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung näher erläutert und beschrieben werden.Reference to the drawings, in which two embodiments of the invention are shown, the invention and further advantageous embodiments and improvements of the invention will be explained and described in detail.

Es zeigen:

Figur 1
eine erste Ausführungsform der Erfindung in schematischer Darstellung,
Figur 2
eine Detailansicht des Klemmenaufnahmeraums der Ausführungsform nach Figur 1,
Figur 3
eine Detailansicht des Klemmenaufnahmeraums einer zweiten Ausführungsform der Erfindung gemäß Fig. 5,
Figur 4
eine Detailansicht von unten in Pfeilrichtung A auf die Mutter mit der darin eingeschraubten Klemmschraube gemäß der Ausführungsform nach Fig. 2, sowie
Figur 5
eine zweite Ausführungsform der Erfindung in schematischer Darstellung.
Show it:
FIG. 1
a first embodiment of the invention in a schematic representation,
FIG. 2
a detailed view of the terminal receiving space of the embodiment according to FIG. 1 .
FIG. 3
a detail view of the terminal receiving space according to a second embodiment of the invention according to Fig. 5 .
FIG. 4
a detail view from below in the direction of arrow A on the mother with the screwed therein clamping screw according to the embodiment according to Fig. 2 , such as
FIG. 5
a second embodiment of the invention in a schematic representation.

Die Figur 1 zeigt schematisch und als Teilschnitt ein Installationsschaltgerät 1, welches ein Isolierstoffgehäuse 2 aufweist. Die Figur 2 zeigt eine Detailansicht des Klemmenaufnahmeraums der Ausführungsform nach Figur 1. Das Installationsschaltgerät 1 ist beispielsweise ein Leitungsschutzschalter. Dessen Isolierstoffgehäuse umfasst eine vordere und hintere Frontseite 3,4, eine vordere und hintere Schmalseite 5,6 und eine Befestigungsseite 7. An der Befestigungsseite 7 ist eine feste Nase 8 angebracht, welche mit einer weiteren, nicht dargestellten, im Allgemeinen beweglichen Nase beim Festklemmen des Leitungsschutzschalters 1 auf einer Tragschiene zusammenwirkt.The FIG. 1 shows schematically and as a partial section of an installation switching device 1, which has an insulating material 2. The FIG. 2 shows a detailed view of the terminal receiving space of the embodiment according to FIG. 1 , The service switching device 1 is for example a circuit breaker. Its insulating housing comprises a front and rear front 3,4, a front and rear narrow side 5,6 and a mounting side 7. On the mounting side 7, a fixed lug 8 is attached, which with another, not shown, generally movable nose when clamping of the circuit breaker 1 cooperates on a mounting rail.

Im Bereich der hinteren Schmalseite 6 ist im Gehäuse 2 ein Klemmenaufnahmeraum 10 vorgesehen, in dem eine Anschlussklemmenanordnung 11 untergebracht ist. Der Klemmenaufnahmeraum 10 ist an der hinteren Schmalseite 6 durch eine Einführöffnung 27 für einen Anschlussleiter 12 und an der hinteren Frontseite 4 durch eine Zugangsöffnung 28 für ein Betätigungswerkzeug, beispielsweise einen Schraubendreher 22, zugänglich.In the region of the rear narrow side 6, a terminal receiving space 10 is provided in the housing 2, in which a terminal assembly 11 is housed. The terminal receiving space 10 is accessible at the rear narrow side 6 through an insertion opening 27 for a terminal conductor 12 and at the rear front side 4 through an access opening 28 for an actuating tool, such as a screwdriver 22.

Mit der Anschlussklemmenanordnung 11 wird der Anschlussleiter 12, der einen ringförmigen Klemmschuh 14 mit einer zentralen Öffnung 13 trägt, durch eine Klemmschraube 15 an einer Anschlussplatte 16 festgeschraubt.With the terminal assembly 11, the terminal conductor 12, which carries an annular clamping shoe 14 with a central opening 13, screwed by a clamping screw 15 to a connection plate 16.

Die Klemmschraube 15 weist einen in Form eines längserstreckten Zylinders ausgebildeten Schraubenkopf 17 und einen Schaft 18 auf. Der Schaft 18 trägt ein Außengewinde 19. An der freien Stirnfläche des Schraubenkopfes 17 ist ein Schlitz 21 zur Aufnahme des Betätigungswerkzeuges, beispielsweise eines Schraubendrehers 22, vorgesehen.The clamping screw 15 has a screw head 17 designed in the form of an elongate cylinder and a shaft 18. The shaft 18 carries an external thread 19. At the free end face of the screw head 17, a slot 21 for receiving the operating tool, such as a screwdriver 22, is provided.

Die Anschlussplatte 16 trägt ein Loch 23. Sie ist in etwa parallel zur hinteren Frontseite 4 ausgerichtet. Die Anschlussplatte 16 ist an eine Ableitschiene 37 angeformt, an die weitere, ins Innere des Installationsschaltgerätes 1 abgehende Stromleiter anschließbar sind. Diese sind hier allerdings nicht dargestellt, ebenso wenig wie alle anderen zum Betrieb eines Installationsschaltgerätes erforderlichen weiteren Komponenten und Baugruppen, wie beispielsweise ein thermischer und elektromagnetischer Auslöser, ein Schaltwerk, ein Schalthebel mit einer Kontaktstelle, eine Lichtbogenlöschanordnung etc.The connection plate 16 carries a hole 23. It is aligned approximately parallel to the rear front side 4. The connection plate 16 is integrally formed on a discharge bar 37, to which further, in the interior of the service switching device 1 outgoing conductor can be connected. However, these are not shown here, as well as all other required for operating a service switching device other components and assemblies, such as a thermal and electromagnetic release, a derailleur, a lever with a contact point, an arc extinguishing system, etc.

Die Ableitschiene 37 und die Anschlussplatte 16 sind durch stegartige Gehäusevorsprünge 32 ortsfest im Gehäuse 2 des Installationsschaltgerätes 1 gelagert.The discharge bar 37 and the connection plate 16 are fixedly mounted in the housing 2 of the service switching device 1 by web-like housing projections 32.

Die Klemmschraube 15 ist in einem in etwa zylinderartigen Führungskanal 24 in dem Klemmenaufnahmeraum 10 geführt. Der Führungskanal 24 verläuft etwa parallel zu der hinteren Schmalseite 6, so dass die Klemmschraube 15 durch ihn senkrecht auf das Loch 23 in der Anschlussplatte 16 hin geführt ist.The clamping screw 15 is guided in an approximately cylindrical guide channel 24 in the terminal receiving space 10. The guide channel 24 extends approximately parallel to the rear narrow side 6, so that the clamping screw 15 is guided by him perpendicular to the hole 23 in the connection plate 16 out.

In der Figur 1 ist die Klemmschraube 15 in einer Aufsetzstellung gezeigt, das heißt, das freie Ende des Schraubenschaftes 18 befindet sich gerade auf der Höhe des Lochs 23. In dieser Stellung kann der ringförmige Klemmschuh 14 nicht in den Klemmenaufnahmeraum 10 eingeführt werden, da er von dem Schraubenschaft 18 blockiert würde. Vor dem Einführen des Klemmschuhs muss die Klemmschraube 15 so weit in Richtung des Pfeils P nach oben hin von der Anschlussplatte 16 abgehoben werden, dass ein mindestens der Dicke des Klemmschuhs 14 entsprechender Raum zwischen dem freien Ende des Schaftes 18 und der Anschlussplatte 16 eröffnet wird, so dass dann der Klemmschuh 14 durch die Einführöffnung 27 eingeschoben werden kann, bis seine Öffnung 13 genau über dem Loch 23 zu liegen kommt.In the FIG. 1 the clamping screw 15 is shown in a Aufsetzstellung, that is, the free end of the screw shaft 18 is located just at the height of the hole 23. In this position, the annular clamping shoe 14 can not be inserted into the terminal receiving space 10, since it from the screw shaft 18th would be blocked. Before inserting the clamping shoe, the clamping screw 15 must be lifted so far in the direction of arrow P upwards from the connection plate 16, that at least the thickness of the clamping shoe 14 corresponding space between the free end of the shaft 18 and the connection plate 16 is opened so that then the Clamping shoe 14 can be inserted through the insertion opening 27 until its opening 13 comes to lie exactly above the hole 23.

Der Ableitschiene 37 kommt hier noch als zweite Funktion die des Einführstops für den Klemmschuh 14 zu, wodurch ein zu weites Einführen des Klemmschuhs vermieden und damit die Montage des Anschlussleiters 12 weiter erleichtert wird.The Ableitschiene 37 comes here as the second function of the Einführstops for the clamping shoe 14, thereby avoiding too far insertion of the clamping shoe and thus the assembly of the connecting conductor 12 is further facilitated.

Der Schraubenkopf 17 trägt in seinem oberen Teil ein Außengewinde 38. An der Innenwand des Führungskanals 24 ist ein Innengewinde 39 oder eine Gehäusekontur, also ein Teilgewinde, mit Gewindefunktion eingebracht. Dieses setzt in dem unteren Teil des Führungskanals 24 an, siehe Fig. 2. Wenn die Klemmschraube 15 von oben her kommend in Richtung auf das Loch 23 in der Anschlussplatte 16 zu bewegt wird, so gleitet sie zunächst im oberen Abschnitt des Führungskanals 24 an dessen Innenwand entlang, und im unteren Teil greift sie bei Drehung mit ihrem Außengewinde in das Innengewinde 39 ein. Die weitere Bewegung der Klemmschraube 15 kann dann nur noch durch Drehen und entsprechende Schraubführung in dem Innengewinde 39 erfolgen. Dadurch ist eine zentrierte Führung der Klemmschraube auf das Loch 23 hin gewährleistet.The screw head 17 carries in its upper part an external thread 38. On the inner wall of the guide channel 24 is an internal thread 39 or a housing contour, so a partial thread, introduced with threading. This starts in the lower part of the guide channel 24, see Fig. 2 , When the clamping screw 15 is moved from above in the direction of the hole 23 in the connection plate 16, it slides first in the upper portion of the guide channel 24 along the inner wall along, and in the lower part it engages with its external thread rotation in the Internal thread 39 a. The further movement of the clamping screw 15 can then be done only by turning and corresponding screw in the internal thread 39. As a result, a centered guidance of the clamping screw on the hole 23 is ensured.

Ein Verlieren der Klemmschraube 15 nach dem Herausdrehen aus dem Innengewinde 39 ist durch einen Hinterschnitt 40 in dem Führungskanal 24 vermieden. Der Hinterschnitt 40 kann als eine ringförmige Wulst oder eine Querschnittsverengung des Führungskanals 24 nach oben hin ausgebildet sein. Die durch den Hinterschnitt 40 verringerte Querschnittsfläche des Führungskanals 24, ist noch immer so groß, dass ein Schraubendreher 22 sich durchführen lässt, um die Klemmschraube 15 zu betätigen, aber er ist kleiner als der Querschnitt des Schraubenkopfes, so dass dieser gewissermaßen unverlierbar in dem Führungskanal 24 gefangen ist. Wenn sich die Klemmschraube 15 nach dem Herausdrehen aus dem Innengewinde 39 nach oben in den Führungskanal 24 geschoben hat, ist die offene Stellung der Schraube erreicht. In dieser Stellung hat die Klemmschraube 25 keinen Gewindeeingriff und kann bei Drehen der Schraube keinen zerstörenden Druck auf das Gehäuse ausüben und stellt automatisch die Montagstellung des Anschlussleiters sicher.Loss of the clamping screw 15 after unscrewing from the internal thread 39 is avoided by an undercut 40 in the guide channel 24. The undercut 40 may be formed as an annular bead or a cross-sectional constriction of the guide channel 24 upwards. The reduced by the undercut 40 cross-sectional area of the guide channel 24 is still so large that a screwdriver 22 can be carried out to actuate the clamping screw 15, but it is smaller than the cross section of the screw head, so that this somewhat captive in the guide channel 24 is caught. If the clamping screw 15 has pushed after unscrewing from the internal thread 39 upwards into the guide channel 24, the open position of the screw is reached. In this position, the clamping screw 25 has no threaded engagement and can not exert destructive pressure on the housing when turning the screw and automatically ensures the mounting position of the connecting conductor.

Auf der der Klemmschraube 15 gegenüberliegenden Seite der Anschlussplatte 16 befindet sich ein Gewindeelement 50, hier in Form einer Vierkantmutter, mit einem Gewindeloch und einem Innengewinde.On the clamping screw 15 opposite side of the connection plate 16 is a threaded member 50, here in the form of a square nut, with a threaded hole and an internal thread.

Bei weiterem Drehen der Klemmschraube 15 wird durch eine zentrierte Führung die Schraube durch das Loch 23 geführt und der Gewindeeingriff zwischen dem Außengewinde 19 am Schaft 18 und dem Innengewinde des Gewindeelements 50 automatisch erreicht. Durch diesen Gewindeeingriff wird die Klemmschraube 15 bei weiterer Drehung weiter in das Gewindeelement 50 hineingezogen, so lange bis der Klemmschuh 14 zwischen dem Schraubenkopf 17 und der Anschlussplatte 16 festgeklemmt ist. Auf diese Weise ist eine feste Schraubverbindung mit einem guten Flächenkontakt herstellbar.Upon further rotation of the clamping screw 15, the screw is guided through the hole 23 by a centered guide and the threaded engagement between the external thread 19 on the shaft 18 and the internal thread of the threaded element 50 is automatically achieved. By this threaded engagement, the clamping screw 15 is further drawn in further rotation in the threaded member 50, until the clamping shoe 14 is clamped between the screw head 17 and the terminal plate 16. In this way, a solid screw with a good surface contact can be produced.

Der Klemmenaufnahmeraum 10 weist eine erste Aussparung 52 mit Begrenzungswänden 55 für die Aufnahme des Gewindeelementes 50 auf. Dies erleichtert das Einsetzen des Gewindeelements 50 und ermöglicht es, dass das Gewindeelement 50 unabhängig von dem Anschlussleiter und schon vor dem Zuführen des Anschlussleiters eingesetzt und in dem Klemmenaufnahmeraum gehalten werden kann. Doch das Gewindeelement 50 wird dabei nicht von den Begrenzungswänden 55 der ersten Aussparung 52 arretierend festgehalten, wenn die Klemmschraube 15 eingeschraubt wird und ein Anzugsmoment auf das Gewindeelement 50 entsteht, wodurch sich das Gewindeelement 50 in der ersten Aussparung 52 verdrehen will.The terminal receiving space 10 has a first recess 52 with boundary walls 55 for receiving the threaded element 50. This facilitates insertion of the threaded member 50 and allows the threaded member 50 to be inserted independently of the lead and prior to feeding the lead and held in the terminal receiving space. However, the threaded element 50 is not held captive lock by the boundary walls 55 of the first recess 52 when the clamping screw 15 is screwed and a tightening torque is applied to the threaded member 50, whereby the threaded member 50 will rotate in the first recess 52.

Um das Gewindeelement 50 arretierend zu halten, hat die Anschlussplatte 16 an ihrem freien Ende einen L-förmig angeformten Steg 51, der als Halteabschnitt 51 zum Arretieren des Gewindeelementes, also der Vierkantmutter 50 dient. Das Gewindeelement 50 wird durch den Halteabschnitt 51 an der Anschlussplatte 16 in seiner Position gehalten. Das Anzugsmoment der Klemmschraube 15 wird also über das Halteteil 51 von der Anschlussplatte 16 aufgenommen, die Gehäuseteile des Installationsschaltgerätes werden nicht belastet.In order to keep the threaded member 50 arresting, the connection plate 16 has at its free end an L-shaped integrally formed web 51, which serves as a holding portion 51 for locking the threaded element, ie the square nut 50. The threaded member 50 is held by the holding portion 51 on the terminal plate 16 in its position. The tightening torque of the clamping screw 15 is thus received on the holding part 51 of the terminal plate 16, the housing parts of the service switching device are not charged.

Figur 4 zeigt, dass die Begrenzungswand 55 der ersten Aussparung 52 eine Freimachung 53 zu dem Gewindeelement 50 hin aufweist, so dass das Gewindeelement 50 in der ersten Aussparung 52 drehbeweglich aufgenommen ist, wobei der Drehwinkel durch das arretierende Anliegen an dem Halteabschnitt 51 der Anschlussplatte 16 begrenzt ist. Die Begrenzungswand 55 ist in ihrem Querschnitt in etwa wie ein Dach mit schrägen Dachflächen ausgebildet. Die Vierkantmutter 50 kann sich um die Spitze des Daches in die zwischen den schrägen Dachflächen und den Seitenwänden der Vierkantmutter gebildeten Freimachungen 53 hineindrehen. Bevor jedoch die Seitenwand der Vierkantmutter 50 an einer der schrägen Dachflächen zum Anliegen kommt, wird die weitere Drehung der Vierkantmutter 50 durch Anlage an dem Halteabschnitt 51 blockiert. Es verbleibt somit immer eine Freimachung 53 zwischen der Seitenwand der Vierkantmutter 50 und den Begrenzungswänden 55 der ersten Aussparung 52. Die Anzugskraft beziehungsweise des Anzugsmoment, das über die Vierkantmutter von der Klemmschraube 18 weitergegeben wird, wirkt nicht auf die Begrenzungswände 55, sondern auf den Halteabschnitt 51 und damit auf die Anschlussplatte 16. Durch die spezielle Gehäusekontur der Freimachung 53 wird verhindert, dass das Gewindeelement 50 die gesamte Kraft beim Festschrauben der Klemmschraube 18 auf die Gehäuseteile 55 aufbringt, da das Gewindeelement 50 selbst immer von dem metallenen Halteabschnitt 51 an der Anschlussplatte 16 und nicht von einem Gehäuseteil arretiert wird und somit ein größeres Anzugsmoment ohne eine übermäßige Gehäusebelastung erreicht werden kann. FIG. 4 shows that the boundary wall 55 of the first recess 52 has a clearance 53 toward the threaded member 50, so that the threaded member 50 is rotatably received in the first recess 52, wherein the rotation angle limited by the arresting concerns on the holding portion 51 of the terminal plate 16 is. The boundary wall 55 is formed in its cross section approximately like a roof with sloping roof surfaces. The square nut 50 can rotate around the top of the roof into the clearances 53 formed between the sloping roof surfaces and the sidewalls of the square nut. However, before the side wall of the square nut 50 comes to rest on one of the sloping roof surfaces, the further rotation of the square nut 50 is blocked by engagement with the holding section 51. Thus, there remains always a clearance 53 between the side wall of the square nut 50 and the boundary walls 55 of the first recess 52. The tightening force or the tightening torque, which is passed through the square nut of the clamping screw 18, does not act on the boundary walls 55, but on the holding portion 51 and thus on the terminal plate 16. The special housing contour of the clearance 53 prevents the threaded member 50 applies the entire force when tightening the clamping screw 18 on the housing parts 55, since the threaded member 50 itself always from the metal holding portion 51 on the connection plate 16 and is not locked by a housing part and thus a larger tightening torque can be achieved without excessive housing load.

In der Ausführungsform gemäß den Figuren 5 und 3 ist der Halteabschnitt 51' ein an die Anschlussplatte 16 angeformter Endabschnitt 56 mit einer zweiten Aussparung 54 zur arretierenden Aufnahme des Gewindeelements. Der Endabschnitt 56 hat in etwa eine U-Form, und die Vierkantmutter 50 ist zwischen den beiden Längsschenkeln der U-Form arretierend gehalten.In the embodiment according to the Figures 5 and 3 the holding section 51 'is an end section 56 integrally formed on the connecting plate 16 and having a second recess 54 for arresting the threaded element. The end portion 56 has approximately a U-shape, and the square nut 50 is held arresting between the two longitudinal legs of the U-shape.

Da die Anschlussplatte mit dem U - förmigen Endabschnitt oder dem L-förmigen Steg bei Verwendung eines kostengünstigen Gewindeelements, beispielsweise einer kostengünstigen Vierkantmutter 50, ohne eigenes Gewinde ausgeführt werden kann, ist eine geringe Materialstärke (Kosteneinsparung) eines hochwertigen Metalls (z.B. Kupfer) bei guter Stromleitfähigkeit und Anzugsmoment der Klemmschraube 15 möglich.Since the terminal plate with the U-shaped end portion or the L-shaped web can be made using a low-cost threaded element, such as a low-cost square nut 50, without a separate thread, a low material thickness (cost savings) of a high-quality metal (eg copper) is good Current conductivity and tightening torque of the clamping screw 15 possible.

Das Gewindeelement 50 hat gegenüber dem Halteabschnitt 51, 5' ein leichtes Spiel, und kann durch das Spiel des Gewindeelements in der U- oder L-Form einfacher eingeschraubt werden und bleibt auch durch toleranzbedingten axialem Versatz der Klemmschraube 15 und dem Gewindeloch in dem Gewindeelement 50 leicht zu bedienen.The threaded member 50 has over the holding portion 51, 5 'a slight backlash, and can be easily screwed by the play of the threaded member in the U- or L-shape and also remains due to tolerance-related axial offset of Clamping screw 15 and the threaded hole in the threaded member 50 easy to use.

Ein weiterer Vorteil durch die U oder L-Form des Halteabschnitts 51, 51' der Anschlussplatte 16 besteht darin, dass keine Querschnittsverringerung des Metalls (z.B. Arretierungslöcher oder Fixierlaschen für das Festhalten des Gewindeelements) notwendig werden. Dies wirkt sich positiv auf Anzugsmomente und die Stromleitfähigkeit aus.Another advantage of the U or L shape of the holding portion 51, 51 'of the terminal plate 16 is that no cross-sectional reduction of the metal (e.g., locking holes or fixing tabs for holding the threaded member) becomes necessary. This has a positive effect on tightening torques and the current conductivity.

Die gesamte Klemmenanordnung 11 kann bei einer rationellen Fertigung auch kostengünstig und einfach vor dem Einbau ins Gerät vormontiert werden.The entire terminal assembly 11 can also be inexpensively preassembled in a rational production before installation in the device.

Die Anschlussplatte 16 ist so im Gehäuse angeordnet, dass der Halteabschnitt 51, 51' in der Nähe der hinteren Schmalseite 6 zu liegen kommt und durch eine Testöffnung 36 von außen zur Kontaktierung zu Test- oder Kalibrierzwecken mittels einer Prüfspitze zugänglich ist.The connection plate 16 is arranged in the housing such that the holding section 51, 51 'comes to rest in the vicinity of the rear narrow side 6 and is accessible from the outside for contacting for test or calibration purposes by means of a test probe through a test opening 36.

Die vorliegende Erfindung umfasst dabei auch beliebige Kombinationen bevorzugter Ausführungsformen sowie einzelner Ausgestaltungsmerkmale oder Weiterbildungen, sofern diese sich nicht gegenseitig ausschließen. Bezugszeichenliste 1 Installationsschaltgerät 36 Testöffnung 2 Isolierstoffgehäuse 37 Ableitschiene 3 Vordere Frontseite 38 Außengewinde am Schraubenkopf 4 Hintere Frontseite 39 Innengewinde im Führungskanal 5 Vordere Schmalseite 40 Hinterschnitt 6 Hintere Schmalseite 50 Gewindeelement 7 Befestigungsseite 51, 51' Halteabschnitt 8 Feste Nase 52 Erste Aussparung 10 Klemmenaufnahmeraum 53 Freimachunq 11 Anschlussklemmenanordnung 54 Zweite Aussparung 12 Anschlussleiste 55 Begrenzungswand 13 Öffnung im Klemmschuh 56 Endabschnitt 14 Ringförmiger Klemmschuh 15 Klemmschraube 16 Anschlussplatte 17 Schraubenkopf 18 Schaft 19 Außengewinde am Schaft 20 Stirnfläche des Schraubenkopfes 21 Schlitz 22 Schraubendreher 23 Loch in der Anschlussplatte 24 Führungskanal in dem Klemmenaufnahmeraum 27 Einführöffnung 28 Zugangsöffnung 32 Stegartige Vorsprünge The present invention also encompasses any combinations of preferred embodiments as well as individual design features or developments, provided that they are not mutually exclusive. LIST OF REFERENCE NUMBERS 1 Service switching device 36 test opening 2 Insulated 37 discharge bar 3 Front front 38 External thread on the screw head 4 Rear front 39 Internal thread in the guide channel 5 Front narrow side 40 undercut 6 Rear narrow side 50 threaded element 7 mounting side 51, 51 ' holding section 8th Fixed nose 52 First recess 10 Terminal accommodation area 53 Freimachunq 11 Terminal arrangement 54 Second recess 12 terminal block 55 boundary wall 13 Opening in the clamping shoe 56 end 14 Annular clamping shoe 15 clamping screw 16 connecting plate 17 screw head 18 shaft 19 External thread on the shaft 20 Face of the screw head 21 slot 22 screwdriver 23 Hole in the connection plate 24 Guide channel in the terminal receiving space 27 insertion 28 access opening 32 Web-like projections

Claims (8)

  1. Service switching device (1) with an insulating housing (2) and with a connection terminal arrangement (11) for the terminal connection of a connecting conductor, wherein the connection terminal arrangement has:
    - a connecting conductor (12) with an annular terminal lug (14) and
    - a connecting plate (16) mounted in the device interior and
    - a thread element (50) and
    - a clamping screw (15), which has a screw head (17) and a screw shaft (18), the screw shaft (18) passing through the annular terminal lug (14) and being in threaded engagement with the thread element (50) during the terminal connection of the connecting conductor (12), and the connection terminal arrangement containing
    - a terminal accommodating area (10) with an insertion opening (27) for the connecting conductor and with an access opening (28) for the screw head (17) for actuation thereof,
    characterized in that the connecting plate (16) has a holding section (51) which locks the thread element, wherein, via the holding section, the tightening torque of the clamping screw can be absorbed by the connecting plate.
  2. Service switching device according to Claim 1, characterized in that the terminal accommodating area (10) has a first cutout (52) for accommodating the thread element (50).
  3. Service switching device according to Claim 2, characterized in that the boundary wall of the first cutout (52) has a recess (53) towards the thread element (50), with the result that the thread element (50) is accommodated in the cutout (52) in rotationally movable fashion, the rotary angle being limited by the thread element bearing in locking fashion against the holding section (51) of the connecting plate (16) .
  4. Service switching device according to Claim 3, characterized in that the holding section (51) is a web which is formed integrally in the form of an L at the free end of the connecting plate (16).
  5. Service switching device according to Claim 3, characterized in that the holding section (51') is an end section, which is integrally formed on the connecting plate (16), with a second cutout (54) for accommodating the thread element (50) in locking fashion.
  6. Service switching device according to Claim 1, characterized in that the thread element (50) is a nut with an internal thread, in particular a square nut.
  7. Service switching device according to one of the preceding claims, characterized in that the screw head (17) bears an external thread (38), and the inner wall of the guide channel (24) in the section pointing towards the connecting plate (16) bears an internal thread (39) or a housing contour with a thread function, with the result that, in engagement with the internal thread (39), a centred guidance of the clamping screw (15) towards the connecting plate (16) is ensured.
  8. Service switching device according to one of the preceding claims, characterized in that an undercut (40) is provided in the guide channel (24) such that the guide channel (24) has a smaller diameter than the screw head (17) between the undercut (40) and the access opening (28), with the result that the clamping screw (15) is prevented from falling out of the guide channel (24) and, in addition, the fitted position of the connecting conductor is thus provided.
EP11005495.4A 2010-08-24 2011-07-06 Installation device with a connection clamp assembly Active EP2424045B1 (en)

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DE102010035250 2010-08-24
DE102011016753A DE102011016753A1 (en) 2010-08-24 2011-04-12 Installation switching device with a terminal arrangement

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EP2424045A3 EP2424045A3 (en) 2012-04-11
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KR100332454B1 (en) * 1999-07-21 2002-04-13 윤종용 Device for connecting terminal
KR100481172B1 (en) * 2002-07-04 2005-04-07 삼성전자주식회사 High capacity terminal fixing apparatus
FR2852452B1 (en) * 2003-03-13 2005-05-20 Framatome Connectors Int SYSTEM FOR ELECTRICALLY CONNECTING AND FIXING AT LEAST ONE DRIVER ON A SUPPORT PART
FR2852450B1 (en) * 2003-03-13 2005-05-13 Framatome Connectors Int SYSTEM FOR ELECTRICALLY CONNECTING AND ATTACHING AT LEAST ONE PLATE-LIKE ELECTRICAL CONDUCTOR TO A SUPPORT PART

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* Cited by examiner, † Cited by third party
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US4136924A (en) * 1977-12-07 1979-01-30 Westinghouse Electric Corp. Terminal connector
EP0681342A1 (en) * 1994-05-05 1995-11-08 The Whitaker Corporation Electrical connector assembly with screw clamp terminals
EP2028721A2 (en) * 2007-08-22 2009-02-25 Abb Ag Installation device with a connection clamp assembly

Also Published As

Publication number Publication date
EP2424045A3 (en) 2012-04-11
EP2424045A2 (en) 2012-02-29
CN202221712U (en) 2012-05-16
US8192238B2 (en) 2012-06-05
DE102011016753A1 (en) 2012-03-01
US20120052749A1 (en) 2012-03-01

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