DE102006005612B4 - Holder for fixing components and / or elements in live systems - Google Patents

Abstract

Holder for fastening components and / or elements in live installations, wherein:
A metal screw (5) is partially surrounded by a plastic jacket (1),
- The metal screw (5) provided with a thickened head end (4) and in a cylindrical bore (2) of the plastic shell (1) is insertable,
- The thickened head end (4) of the metal screw (5) in an extension (3) of the cylindrical bore (2),
- An end face of the thickened head end (4) of the metal screw (5) within the extension (3) of the cylindrical bore (2) at a distance from the end face of the plastic sheath (1),
- The metal screw (5) on the cylindrical bore (2) of the plastic sheath (1) protrudes and is provided in this projecting area with an external thread,
A plastic forming the plastic jacket (1) fulfills the requirements of UL 94,
- The wall of the in the cylindrical bore (2) of the plastic sheath (1) lying metal screw (5) has a sawtooth-shaped training (9) with ...

Description

The The invention relates to a holder for fixing components and / or Elements in current-carrying Installations in which a metal screw partially from a plastic sheath is surrounded.

holder the indicated genus find versatile use, for example for attaching control boards in the control module for trains, trams and metros. In these applications, with 15,000 V and 1,600 A worked.

The document DE 26 17 911 A1 discloses a fastener for securing a compliant thermal insulation, such as a mineral wool mat, to a substrate such as a flat roof.

The document DE 87 06 704 U1 discloses a connector housing in cuboid plastic for an electrical connector.

The document DE 102 49 993 A1 describes a screw with a screw head and a first and a second shaft portion made of plastic, wherein the second shaft portion is arranged rotatably held in the first shaft portion and having a thread and a drill bit.

From the document DE 77 37 645 U1 is a screw or a nut known as threaded fasteners for live parts. The screw or nut comprises a metal core and a plastic jacket firmly connected thereto, wherein the plastic casing is polygonal and has surfaces for applying a key tool.

The document DE 1 845 227 U describes a arranged in a plastic part socket with a threaded hole or a threaded pin, wherein the bush made of threadable parts, dyeable plastics, such as polyamides, polyurethanes or acetal resins, is made.

From the document DE 26 53 440 B2 An apparatus clamp emerges with a socket. The socket part has a centric connection opening and a radial connection in the region of a wall opening. Furthermore, a surrounding, limited axially movable insulating sleeve is provided on the socket part.

outgoing From the cited prior art, it is therefore necessary that the metal screw firmly anchored in the plastic shell and the holder in the whole fully meets the requirements.

These Task is inventively characterized solved, that the Made of a, compliant with UL 94 compliant plastic Mantel has a continuous cylindrical bore, which is connected to a End has an extension, with a thickened headboard provided metal screw is inserted into the cylindrical bore and the thickened head end of the metal screw, which advantageously made of brass, located in the extension of the bore. The front side of the thickened head end of the metal screw is located within the extension of the cylindrical bore at a distance from the Front side of the plastic jacket. The metal screw protrudes over the cylindrical bore of the plastic sheath, this outstanding Part with an external thread is provided. The wall in the cylindrical bore of the plastic sheath lying metal screw has a sawtooth shape with a knurling on.

at a preferred embodiment According to the invention, the plastic jacket has an outer polygonal profile over part of its length on, that expediently is designed as a hexagonal profile. After an embodiment of the invention the plastic sheath consists of a non-flammable self-extinguishing Plastic. The metal screw according to the invention can be loaded with a torque of ≥ 1.5 Nm.

To Another feature of the invention is for attaching the holder for fastening components and / or elements in live systems, wherein a metal screw partially embedded in a plastic sheath is over, the metal screw tightened on a polygonal profile of the plastic jacket attachable socket wrench.

One embodiment The invention is illustrated in the drawing and will be described below described in more detail. Show it:

1 a vertical section through a holder according to the invention;

2 the view of a brass screw and

3 a vertical section through a plastic sheath.

The jacket formed from a plastic meeting the requirements of UL 94 1 has a continuous cylindrical bore 2 , which at one end is an extension 3 having. The thickened headboard 4 the brass screw 5 lies in the extension 3 the bore 2 , As 1 shows, ends the front side of the thickened headboard 4 the metal screw 5 within the extension 3 the cylindrical bore 2 at a distance from the front side of the plastic sheath 1 , The over the cylindrical bore 2 of the plastic sheath 1 projecting part of the metal screw 5 is with an external thread 6 provided while the wall of the in the cylindrical bore 2 lying part of the metal screw 5 a sawtooth formation 9 with knurling 7 having. By sawtooth training 9 should be an axial pressure and by knurling 7 a radial twisting counteracted.

The plastic jacket 1 has a hexagonal profile 8th , through which by means of a socket wrench, the metal screw 5 can be attracted. Without significant mechanical changes (maximum 0.2 mm length deviation) is the metal screw 5 loadable with a torque of ≧ 1.5 Nm. As a result, large pressure forces on the mechanical connections are possible. In addition, the insulation of the metal screw ensures 5 an application in plants that are operated with high current or voltage values, too. The continuous service temperature is between -30 ° C and 120 ° C; the short-term service temperature can be 170 ° C.

1

Plastic sheath

2

cylindrical drilling

3

Extension of 2

4

thickened headboard of 5

5

metal screw

6

external thread

7

knurling

8th

Hexagonal profile

9

sawtooth formation

Claims (7)

Holder for fixing components and / or elements in live installations, wherein: - a metal screw ( 5 ) partially from a plastic jacket ( 1 ), - the metal screw ( 5 ) with a thickened headboard ( 4 ) and into a cylindrical bore ( 2 ) of the plastic jacket ( 1 ) is insertable, - the thickened headboard ( 4 ) of the metal screw ( 5 ) in an extension ( 3 ) of the cylindrical bore ( 2 ), - a front side of the thickened head end ( 4 ) of the metal screw ( 5 ) within the extension ( 3 ) of the cylindrical bore ( 2 ) at a distance from the front side of the plastic sheath ( 1 ), - the metal screw ( 5 ) over the cylindrical bore ( 2 ) of the plastic sheath ( 1 ) and is provided in this projecting area with an external thread, - a plastic shell ( 1 ) plastic complies with the requirements of UL 94, - the wall in the cylindrical bore ( 2 ) of the plastic sheath ( 1 ) lying metal screw ( 5 ) a sawtooth formation ( 9 ) with knurling ( 7 ) and - the metal screw ( 5 ) partially in the plastic sheath ( 1 ) is embedded. Holder according to claim 1, characterized in that the metal screw ( 5 ) consists of brass. Holder according to one of claims 1 or 2, characterized in that the metal screw ( 5 ) with a torque ≥ 1.5 Nm can be loaded. Holder according to one of claims 1 to 3, characterized in that the plastic jacket ( 1 ) has an outer polygonal profile over part of its length. Holder according to claim 4, characterized in that the polygonal profile by a hexagonal profile ( 8th ) is formed. Method for fixing a holder according to one of claims 1 to 3, wherein the metal screw ( 5 ) by means of a on a polygonal profile of the plastic sheath ( 1 ) fitting socket wrench is tightened. Method for fixing a holder according to one of claims 4 or 5, wherein the metal screw ( 5 ) by means of a on the polygonal profile of the plastic sheath ( 1 ) fitting socket wrench is tightened.