AT45825B - Screw connection for fixing electrical equipment. - Google Patents

Screw connection for fixing electrical equipment.

Info

Publication number
AT45825B
AT45825B AT45825DA AT45825B AT 45825 B AT45825 B AT 45825B AT 45825D A AT45825D A AT 45825DA AT 45825 B AT45825 B AT 45825B
Authority
AT
Austria
Prior art keywords
screw connection
electrical equipment
screw
fixing electrical
nut
Prior art date
Application number
Other languages
German (de)
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
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT45825B publication Critical patent/AT45825B/en

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Landscapes

  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Schraubenverbindung für die Befestigung elektrischer Apparate. 



   Bei den üblichen Schraubenverbindungen für die Befestigung elektrischer Apparate an metallischen Teilen, wie beispielsweise Blechsockeln oder-Gehäusen, besteht meistens der   Übelatand,   dass von den stromführenden Teilen des Apparates ein   Stromübergang   durch die Schraube und Mutter nach dem   Blechsockel oder-Gehäuse   nicht leicht zu vermeiden ist. Zur Isolation dienende Unterlegscheiben, Büchsen und dgl. haben aber den Nachteil, dass sie durch die grössere Zahl der einzelnen zu der Schraubenverbindung gehörenden Teile die Montage erschweren und ausserdem bei Vorhandensein grösserer Spannungsunter-   schiede,   namentlich in feuchten Räumen, eine mangelhafte Isolation gewähren, sofern man nicht für die Isolationsteile aussergewöhnliche Konstruktionen wählt. 



   Erfindungsgemäss wird eine die Montage nicht erschwerende und trotzdem   vorzügliche   Isolation des Schraubenbolzens gegen den der Mutter anliegenden der zu verbindenden Teile dadurch geschaffen, dass die ganz oder teilweise mit Isoliermaterial umgebene Mutter einen isolierenden, den Schraubenschaft innerhalb der Bohrung der   Sockelplatte   oder dgl. umgebenden Ansatz trägt. 



   Auf der Zeichnung ist in Fig. 1 ein-Schnitt durch eine beispielsweise Ausführungsform einer derartigen Schraubenverbindung dargestellt. Es wird dabei ein Apparatteil b auf eine als Teil eines Gehäuses oder Sockels zu denkende Blechplatte a mittels eines Schraubenbolzens s festgeschraubt. Der Schraubenbolzen kann nun über den Apparatteil b Spannung erhalten, welche nicht in die Platte a übertreten darf. Es ist deshalb zwischen die beiden zu verbindenden Teile eine Isolierschicht c gelegt und ausserdem die Schraubenmutter d an der Aussen-und Unterseite mit Isoliermaterial e, beispielsweise Hartgummi, umgeben. Das Isoliermaterial besitzt auf der Unterseite der Mutter einen Ansatz   y,   welcher in die entsprechend gross gewählte Bohrung in der Blechplatte a eingreift und somit den Schraubenbolzen s innerhalb dieser isolierend umgibt. 



   In Fig. 2 ist eine Oberansicht der Schraubenmutter dargestellt, deren Ansatz   9   beispielsweise viereckige Gestalt besitzt. Es wird auf diese'Weise mittels des Ansatzes, der natürlich in eine entsprechend ausgestanzte Öffnung der Platte a eingreifen muss, erreicht, dass die Mutter g unverrückbar festgehalten und von der Aussenseite nicht lösbar ist. 



     PATENT-ANSPRÜCHE   :
1. Schraubenverbindung für die Befestigung elektrischer Apparate an Blechsockeln   oder-Gehäusen,   gekennzeichnet durch eine ganz oder teilweise mit Isoliermaterial   umgebene  
Mutter, welche einen isolierenden, den Schraubenschaft innerhalb der Bohrung der Be- 
 EMI1.1 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Screw connection for fixing electrical equipment.



   With the usual screw connections for fastening electrical equipment to metallic parts, such as sheet metal bases or housings, there is usually the disadvantage that a current transfer from the current-carrying parts of the apparatus through the screw and nut to the sheet metal base or housing cannot easily be avoided . Washer, bushings and the like used for insulation have the disadvantage that they make assembly more difficult due to the larger number of individual parts belonging to the screw connection and, moreover, provide inadequate insulation if there are larger voltage differences, especially in damp rooms one does not choose unusual constructions for the insulation parts.



   According to the invention, the assembly is not made difficult and yet excellent insulation of the screw bolt against the parts to be connected resting on the nut is created in that the nut, which is completely or partially surrounded by insulating material, carries an insulating approach surrounding the screw shaft within the bore of the base plate or the like .



   In the drawing, FIG. 1 shows a section through an exemplary embodiment of such a screw connection. An apparatus part b is screwed onto a sheet metal plate a, which can be thought of as part of a housing or base, by means of a screw bolt s. The screw bolt can now receive tension via the apparatus part b, which must not pass into the plate a. An insulating layer c is therefore placed between the two parts to be connected, and the screw nut d is also surrounded on the outside and underside with insulating material e, for example hard rubber. The insulating material has a shoulder y on the underside of the nut which engages in the correspondingly large bore in the sheet metal plate a and thus surrounds the screw bolt s in an insulating manner within it.



   In Fig. 2 is a top view of the nut is shown, the extension 9 has, for example, a square shape. In this way, by means of the projection, which of course has to engage in a correspondingly punched-out opening in the plate a, the nut g is held immovably and cannot be released from the outside.



     PATENT CLAIMS:
1. Screw connection for attaching electrical equipment to sheet metal bases or housings, characterized by a fully or partially surrounded by insulating material
Nut, which has an insulating screw shank inside the hole of the loading
 EMI1.1
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

2. Schraubenverbindung nach Anspruch 1, gekennzeichnet durch einen eckig gestalteten . \nsatz (9) an der Mutter. EMI1.2 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. 2. Screw connection according to claim 1, characterized by an angular shape. \ nset (9) on the mother. EMI1.2 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT45825D 1910-02-15 1910-02-15 Screw connection for fixing electrical equipment. AT45825B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT45825T 1910-02-15

Publications (1)

Publication Number Publication Date
AT45825B true AT45825B (en) 1911-01-10

Family

ID=3565800

Family Applications (1)

Application Number Title Priority Date Filing Date
AT45825D AT45825B (en) 1910-02-15 1910-02-15 Screw connection for fixing electrical equipment.

Country Status (1)

Country Link
AT (1) AT45825B (en)

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