DE102014012350B3 - Connection arrangement for an electrical device - Google Patents

Abstract

Connection arrangement for an electrical device wherein a first insulating body is arranged in a particular continuous recess, in particular opening, a housing wall of the electrical device, in particular screw-connected to the housing wall, wherein a contact means is carried out by the first insulating body and is thus carried out through the recess, wherein the contact means is spaced from the housing wall, wherein the contact means comprises an external thread on which a threaded insert is screwed with its internal thread, wherein the threaded insert is received by a second insulating body or inserted into a second insulating body, wherein one or more cable lugs each with a cable are connected, wherein the one or more cable lugs each have an eyelet or fork formed tab portion, wherein the contact means is guided through the eyelet, eyelets or fork opening of the respective fork, wherein the tabs areas are pressed from the second insulating body to the first insulating body, wherein the first insulating body has claw portions which overlap in the axial direction, ie in particular Schraubachsrichtung the external thread, with the covered by the second insulating axial region, wherein the claw portions are circumferentially spaced from each other, wherein Circumferentially between a pair of adjacent claw portions, a cable lug is arranged with cable connected thereto.

Description

The invention relates to a connection arrangement for an electrical device and an electrical device with a connection arrangement.

It is well known that electrical connections pose a potential hazard when touched by the human finger.

From the DE 102 20 047 A1 is a drive system with converter control for low-voltage motors known.

There, a connection arrangement for an electrical device is known having formed in a housing wall of the electrical device through recess, in which an electrically conductive contact insert is arranged, for a Durchgangsdontaktierung arranged inside the housing electrical components to an external line connection.

In addition, a first insulating body made of an electrically insulating material is known, which is arranged in the continuous recess of the housing wall and connected thereto.

In addition, it is also known that the electrically conductive contact insert is guided by the first insulating body spaced from the housing wall.

In addition, the contact inserts are provided for the connection of a cable lug, which is on the one hand connected to a cable and on the other hand have a shaped as an eyelet or fork tab area. It is fastened by means of threaded or screw-in threaded inserts, cap nuts, nuts or screws.

From the DE 10 2005 013 953 A1 is a power connection for a power and control unit of a battery-powered industrial truck known. There, a connection arrangement for an electrical device is known having formed in a housing wall of the electrical device through recess, in which an electrically conductive contact insert is arranged, for a Durchgangsdontaktierung arranged inside the housing electrical components to an external line connection.

In addition, a first insulating body made of an electrically insulating material is known, which is arranged in the continuous recess of the housing wall and connected thereto.

In addition, it is also known that the electrically conductive contact insert is guided by the first insulating body spaced from the housing wall.

In addition, the contact inserts are provided for the connection of a cable lug, which is on the one hand connected to a cable and on the other hand have a shaped as an eyelet or fork tab area. It is fastened by means of threaded or screw-in threaded inserts, cap nuts, nuts or screws.

From the EP 1 627 450 B1 is an arrangement for fixing a bonding plug to a power output terminal fixed to the rectifying means of a rotary electric machine. There, a connection arrangement for an electrical device is known having formed in a housing wall of the electrical device through recess, in which an electrically conductive contact insert is arranged, for a Durchgangsdontaktierung arranged inside the housing electrical components to an external line connection.

In addition, a first insulating body made of an electrically insulating material is known, which is arranged in the continuous recess of the housing wall and connected thereto.

In addition, it is also known that the electrically conductive contact insert is guided by the first insulating body spaced from the housing wall.

In addition, the contact inserts are provided for the connection of a cable lug, which is on the one hand connected to a cable and on the other hand have a shaped as an eyelet or fork tab area. It is fastened by means of threaded or screw-in threaded inserts, cap nuts, nuts or screws.

From the WO 2010/096 590 A2 is a system for power connection known. There, a connection arrangement for an electrical device is known having formed in a housing wall of the electrical device through recess, in which an electrically conductive contact insert is arranged, for a Durchgangsdontaktierung arranged inside the housing electrical components to an external line connection.

In addition, a first insulating body made of an electrically insulating material is known, which is arranged in the continuous recess of the housing wall and connected thereto.

In addition, it is also known that the electrically conductive contact insert by the first Insulating body is guided by the housing wall spaced therethrough.

In addition, the contact inserts are provided for the connection of a cable lug, which is on the one hand connected to a cable and on the other hand have a shaped as an eyelet or fork tab area. It is fastened by means of threaded or screw-in threaded inserts, cap nuts, nuts or screws.

From the GB 630 456 A is an improvement in electrical cable connections known. There, a connection arrangement for an electrical device is known having formed in a housing wall of the electrical device through recess, in which an electrically conductive contact insert is arranged, for a Durchgangsdontaktierung arranged inside the housing electrical components to an external line connection.

In addition, a first insulating body made of an electrically insulating material is known, which is arranged in the continuous recess of the housing wall and connected thereto.

In addition, it is also known that the electrically conductive contact insert is guided by the first insulating body spaced from the housing wall.

In addition, the contact inserts are provided for the connection of a cable lug, which is on the one hand connected to a cable and on the other hand have a shaped as an eyelet or fork tab area. It is fastened by means of threaded or screw-in threaded inserts, cap nuts, nuts or screws.

From the DE 20 2007 010 405 U1 a connection element is known. There, a connection arrangement for an electrical device is known having formed in a housing wall of the electrical device through recess, in which an electrically conductive contact insert is arranged, for a Durchgangsdontaktierung arranged inside the housing electrical components to an external line connection.

In addition, a first insulating body made of an electrically insulating material is known, which is arranged in the continuous recess of the housing wall and connected thereto.

In addition, it is also known that the electrically conductive contact insert is guided by the first insulating body spaced from the housing wall.

In addition, the contact inserts are provided for the connection of a cable lug, which is on the one hand connected to a cable and on the other hand have a shaped as an eyelet or fork tab area. It is fastened by means of threaded or screw-in threaded inserts, cap nuts, nuts or screws.

From the DE 10 2007 046 690 A1 is a weldable fastener with a contact pin for at least one electrical contact known. In addition, an insulating body for placement on the contact pin for a twist protection of several cable lugs to be connected is known. In this case, the contact pin on an external thread for screwing a cap nut. In addition, the contact inserts are provided for the connection of a cable lug, which is on the one hand connected to a cable and on the other hand have a shaped as an eyelet or fork tab area. It is fastened by means of threaded or screw-in threaded inserts, cap nuts, nuts or screws.

From the FR 2 693 842 A1 a device for fixing electrical cables is known. In addition, the contact inserts are provided for the connection of a cable lug, which is on the one hand connected to a cable and on the other hand have a shaped as an eyelet or fork tab area. It is fastened by means of threaded or screw-in threaded inserts, cap nuts, nuts or screws.

From the EP 2 511 983 A1 a cable lug with attached cable is known in which the cable lug on its cable attachment portion and a part of the cable has an additional insulation.

From the DE 81 34 221 U1 is known a compression sleeve. There is also known a cable lug with attached cable in which the lug has an additional insulation at its cable attachment portion and a portion of the cable.

The invention is therefore based on the object to provide a connection arrangement for an electrical device, which has an improved contact protection.

According to the invention the object is achieved in the connection arrangement for an electrical device according to the features indicated in claim 1.

• – einem ersten Isolierkörper aus einem elektrisch isolierenden Material, der in einer durchgehenden Ausnehmung einer Gehäusewand des elektrischen Geräts angeordnet und mit der Gehäusewand schraubverbunden ist, wobei ein elektrisch leitfähiger Kontakteinsatz durch den ersten Isolierkörper von der Gehäusewand beabstandet hindurch geführt ist und außerhalb der Gehäusewand ein Außengewinde aufweist,
• – einem zweiten Isolierkörper, in welchem ein Gewindeeinsatz mit einem Innengewinde angeordnet ist, wobei der Gewindeeinsatz mit seinem Innengewinde auf das Außengewinde des Kontakteinsatzes aufgeschraubt ist, und
• – einem oder mehrere Kabelschuhe, die jeweils mit einem Kabel verbunden sind und mit ihrem als Öse oder Gabel ausgeformten Laschenbereich auf dem Kontakteinsatz angeordnet und mittels des auf das Außengewinde des Kontakteinsatzes aufschraubbaren Gewindeeinsatzes am Kontakteinsatz befestigt sind,

wobei der erste Isolierkörper in Umfangsrichtung des ersten Isolierkörpers regelmäßig voneinander beabstandete Klauenabschnitte aufweist, welche in Schraubachsrichtung das Außengewinde des Kontakteinsatzes mit dem vom zweiten Isolierkörper überdeckten axialen Bereich überlappen,
wobei die Klauenabschnitte des ersten Isolierkörpers den zweiten Isolierkörper jeweils berühren und der zweite Isolierkörper radial innerhalb der Klauenabschnitte angeordnet ist,
wobei in Umfangsrichtung zwischen zwei benachbarten Klauenabschnitten ein Kabelschuh mit daran befestigtem Kabel angeordnet ist, wobei der Kabelschuh an seiner von seinem Laschenbereich beabstandeten Außenseite eine elektrische Isolierung aufweist, die mit der Isolierung des Kabels zusammenstößt, wobei zumindest eine der elektrischen Isolierungen den von den Klauenabschnitten überdeckten Radialabstandsbereich überdecken, und
wobei der freie Bereich zwischen zwei benachbarten Klauenabschnitten in Umfangsrichtung sowie in axialer Richtung kleiner als die Abmessung einer Prüffingerspitze ist.Important features of the invention in the connection arrangement for an electrical device are that the connection arrangement is provided for an electrical device, with

• - A first insulating body made of an electrically insulating material, which is arranged in a continuous recess of a housing wall of the electrical device and screwed to the housing wall, wherein an electrically conductive contact insert is guided by the first insulating body spaced from the housing wall and outside the housing wall an external thread having,
• - A second insulating body, in which a threaded insert is arranged with an internal thread, wherein the threaded insert is screwed with its internal thread on the external thread of the contact insert, and
• - One or more cable lugs, which are each connected to a cable and arranged with its formed as an eyelet or fork strap portion on the contact insert and are fastened by means of screwed onto the external thread of the contact insert threaded insert on the contact insert,

wherein the first insulating body in the circumferential direction of the first insulating body regularly spaced apart claw sections which overlap in Schraubachsrichtung the external thread of the contact insert with the covered by the second insulating axial region,
wherein the claw portions of the first insulator contact the second insulator, respectively, and the second insulator is disposed radially inward of the claw portions,
wherein in the circumferential direction between two adjacent claw portions, a cable lug with attached cable is arranged, wherein the lug on its spaced from its strap portion outside has an electrical insulation, which collides with the insulation of the cable, wherein at least one of the electrical insulation covered by the claw portions Overlap radial distance range, and
wherein the free area between two adjacent claw portions in the circumferential direction and in the axial direction is smaller than the dimension of a Prüffingerspitze.

The advantage here is that the metallic bare area of the cable lug and the contact means is protected from contact by human fingers by the existing between the first and second insulating space between the jaw sections is sufficiently small executable, that although a cable lug with cable is feasible - but not a human finger or a suitably standardized tester's tip.

The contact means is preferably designed like a pencil, wherein the pin axis corresponds to the axial direction of the external thread.

Thus, the contact protection is advantageously improved.

In an advantageous embodiment, the boundary of the continuous recess in the housing wall in the axial direction or counter to the axial direction is tapered, ie with monotonically decreasing diameter. The advantage here is that the first insulating body is centered in the recess and also only in the axial direction - but not in the opposite direction, insertable and connectable to the housing wall.

In an advantageous embodiment, the first insulating body and the second insulating body are made of an electrically insulating material, in particular plastic,
in particular, wherein the threaded insert and the contact means are made of metal. The advantage here is that an electrical insulation is effected.

In an advantageous embodiment of the threaded insert with the second insulating body is positively and / or cohesively connected,
in particular wherein the second insulating body is made as a plastic extrusion around the threaded insert around. The advantage here is that a mechanically strong threaded connection is used. In particular, stress due to lateral forces or axial forces does not damage the connection.

In an advantageous embodiment of the threaded insert has an external thread on the positive connection, in particular screw, with the second insulating body, in particular wherein the threaded insert in the second insulating body is inextricably and / or irreversibly screwed. The advantage here is that a simple connection can be produced.

In an advantageous embodiment, the claw sections are regularly spaced apart in the circumferential direction,
in particular, wherein the claw sections are each formed identically. The advantage here is that equally wide cable lugs and / or cables are radially inserted between the jaw sections.

In an advantageous embodiment of the second insulating body in the axial direction is spaced from the recess, in particular by means of the first insulating body and the cable lugs or the. The advantage here is that a free space between the first and second insulating body can be produced, in which the cable lugs are connected to the contact means.

In an advantageous embodiment, the cable has an electrical conductor with electrical insulation and the respective cable lug has its outside of its tab area spaced outside an electrical insulation,
in particular wherein at least one of the electrical insulations cover at least the radial distance range covered by the claw sections,
in particular, wherein the two electrical insulations touch each other. The advantage here is that a gap-free isolation outside the free space is feasible.

In an advantageous embodiment, a driving profile is formed on the second insulating body, in particular a hexagonal profile, in particular wherein the driving profile is arranged centrally to the axial direction of the thread. The advantage here is that a simple operation is achievable.

In an advantageous embodiment, the existing between two claw sections in the circumferential direction and in the axial direction free area is so small that coming from the outside by a standard, in particular according to DIN EN 60529 running Prüffingerspitze no metallic, especially uninsulated, surface portion, in particular of the contact means or a cable lug is touched. The advantage here is that a high contact reliability can be ensured.

In an advantageous embodiment, the contact means is electrically connected on its side facing away from the second insulating body with a conductor track of a printed circuit board, in particular and screw-connected. The advantage here is that the connection arrangement allows contacting a arranged in the interior of the housing circuit board arranged outside of the housing cable.

In an advantageous embodiment, the claw portions of the first insulating body contact the second insulating body respectively,
in particular, wherein the second insulating body is arranged radially within the claw sections. The advantage here is that the bare area is surrounded in all spatial directions, in particular of the first and second insulator.

Important features of the electrical device with an abovementioned connection arrangement are that the housing of the device enclosing the housing wall surrounds one or the printed circuit board which is connected to the contact means.

The advantage here is that the contact means is electrically connected to the circuit board and outside the housing is electrically connected to cables.

Further advantages emerge from the subclaims.

The invention will now be explained in more detail with reference to figures:

In the 1 is a cross-section through a connection arrangement according to the invention of an electrical device, such as accumulator assembly or inverter, shown.

In the 2 an associated plan view of the connection arrangement is shown.

In the 3 an associated longitudinal section is shown.

In the 4 an associated oblique view is shown.

As shown in the figures, the electrical device has a housing whose housing wall has an opening, in particular a recess, through which an electrical connection is made.

In the housing surrounded by the interior of the device is a circuit board 6 arranged, which with a contact means 1 , in particular electrically conductive contact insert, is equipped. This is the contact agent 1 electrically connected to at least one conductor track of the printed circuit board 6 , In the figures, for example, a screw connection is shown, in which the screw 7 from the contact agent 1 opposite side of the circuit board 6 Coming through the circuit board 6 is guided and in a threaded hole of the contact means 1 is screwed in, leaving the screw head of the screw 7 is supported on the circuit board 6 and the contact agent 1 from the screw 7 against the circuit board 6 is pressed. Alternatively, however, a solder joint is executable.

The contact agent 1 protrudes through the opening of the housing wall, in which a first insulator 2 is used, which is made of electrically insulating material. The contact agent 1 protrudes through a recess 5 ' of the first insulating body and has at its outstanding in the outer region end an external thread.

The first insulating body 2 is with the housing wall 5 screw-connected. Here are screws 7 Coming from the interior of the device through holes in the housing wall 5 passed and into the first insulator 2 screwed. Alternatively, but would also be the first insulator 2 provided with a thread and thus screw-connected with a correspondingly shaped boundary of the opening of the housing wall 5 ,

As shown in the figures, close the first insulator 2 and the contact means taken up by him 1 the opening of the housing wall. there is the contact agent 1 with the first insulating body 2 preferably tightly connected.

By a stepped design of the opening, in particular of the opening bordering the edge region of the opening, is a centering and orientation of the first insulating body 2 to the housing wall 5 reachable.

Preferably, the contact means 1 pressed in the first insulating body 2 , so that a tight connection between contact means 1 and first insulator 2 is reached. In a further development is also a seal between the contact means 1 and insulating body providable. Likewise, a seal between the housing wall 5 and first insulating body can be arranged.

As shown in the figures, the contact means 1 at his from the circuit board 6 remote end portion on a pin-like extension on which an external thread is incorporated.

A threaded insert 9 is in a second insulating body 3 taken, with the threaded insert 9 a to the external thread of the contact means 1 has corresponding internal thread, with which it is screwed onto the external thread of the threaded insert 9 ,

The second insulating body 3 is fixed, in particular rotationally fixed, with the threaded insert 9 connected and has on its outer surface a driving profile 3 ' on, in particular an outer hexagonal area, so that a tool is positively connected and the second insulating body 3 and thus the threaded insert 9 is rotatable.

Here is the threaded insert 9 with an outer toothing arranged on its outer surface into the second insulating body 3 screwed, wherein the screw is preferably insoluble, in particular so irreversible. Alternatively, the threaded insert 9 even without external teeth but dowel-like or cohesively, for example by plastic extrusion, with the second insulator 3 connected. In a simple embodiment, the threaded insert 9 To this elevations on its outer surface and is provided with the plastic encapsulated, wherein the plastic extrusion coating the second insulator 3 forms.

The threaded insert 9 is made of metal. The first insulating body 2 and second insulator 3 is made of plastic.

As shown in the figures, there are two cable lugs 8th' , each with a cable 8th are connected, with their respective eyelet having tab on the pin-like extension of the contact means 1 plugged and are from the second insulator 3 by means of the threaded insert 9 against one at the contact means 1 pressed shoulder in this way is a safe electrical contact between the cable lugs 8th' and the contact agent 1 effected.

The respective cable lug 8th' is surrounded at its spaced from the tab outside with electrical insulation. This is also the case with the cable lug 8th' connected cables 8th an electrical conductor with electrical insulation.

Thus, the metallic freely accessible surface portion of the cable 8th with cable lug 8th' in one of the first insulator 2 and second insulator 3 covered space area arranged.

In this case, the insulating body ( 2 . 3 ) formed such that the access from the outside is only possible for very narrow objects, in particular narrower than the Prüffingerspitzen shown in the figures 4 , The test finger tips 4 simulate a human finger according to standard and are made of metal.

The first insulating body 2 has claw sections 2 ' on to the from the circuit board 6 protrude away from the side, in particular in the axial direction. The claw sections 2 ' are each spaced in the circumferential direction to the threaded axis of each other, in particular regularly, and have the same Mindestradialabstand to the thread axis. The claw sections 2 ' are therefore arranged at the same radial distance and preferably each formed identically. In the axial direction, the claw portions extend 2 ' the same distance.

The second insulating body 3 is arranged radially within the minimum radial distance. The axially of the second insulating body 3 covered area overlaps with that of the claw sections 2 ' axially covered area.

The second insulating body 3 is radially inside the claw sections 2 ' arranged. By means of the second insulator 3 shaped carrier profile 3 ' , preferably a hexagonal profile, is the second insulating body 3 with the recorded in it and rotatably connected threaded bushing 9 screwed onto the external thread of the contact agent 1 ,

In the respective by the provided in the circumferential direction spacing of the claw portions 2 ' is in each case a cable lug 8th' insertable with cable connected thereto and connectable to the contact pin.

The cables are thus in the circumferential direction by means of the claw sections 2 ' spaced.

For producing a permanent connection between the second insulating body 3 and threaded insert 9 is a plastic particle as a plastic stain or a plastic stain coating on the external thread of the threaded insert 9 applied. Thus, a loss of security can be achieved because the plastic is elastically deformed and thus clamped the screw.

After screwing on the thread insert 9 by actuation of the second insulating body via its driving profile 3 ' is the cable lug 8th' or are the cable lugs 8th' screwed on and it is a touch security against objects coming from outside, as well as fingers achieved.

LIST OF REFERENCE NUMBERS

1

Contact means, in particular electrically conductive contact insert

2

first insulating body

2 '

Claw sections on the first insulating body 2

3

second insulator

3 '

Carrying profile on the second insulating body 3

4

Test finger tip IP2X

5

housing wall

5 '

Recess in the first insulating body 2

6

circuit board

7

screw

8th

Cable comprising electrical conductor and electrical insulation

8th'

lug

9

Threaded insert, in particular threaded bush

Claims (10)

Connection arrangement for an electrical device, with a first insulating body ( 2 ) made of an electrically insulating material, which in a continuous recess ( 5 ' ) a housing wall ( 5 ) of the electrical device and with the housing wall ( 5 ) ( 7 ), wherein an electrically conductive contact insert ( 1 ) through the first insulating body ( 2 ) from the housing wall ( 5 ) is guided through spaced and outside the housing wall ( 5 ) has an external thread, a second insulating body ( 3 ), in which a threaded insert ( 9 ) is arranged with an internal thread, wherein the threaded insert ( 9 ) with its internal thread on the external thread of the contact insert ( 1 ) is screwed on, and one or more cable lugs ( 8th' ), each with a cable ( 8th ) are connected and with their formed as an eyelet or fork tab area on the contact insert ( 1 ) and by means of the on the external thread of the contact insert ( 1 ) threaded insert ( 9 ) at the contact insert ( 1 ), wherein the first insulating body ( 2 ) in the circumferential direction of the first insulating body ( 2 ) regularly spaced claw sections ( 2 ' ), which in Schraubachsrichtung the external thread of the contact insert ( 1 ) with the second insulator ( 3 ) overlap covered axial region, wherein the claw sections ( 2 ' ) of the first insulating body ( 2 ) the second insulating body ( 3 ) and the second insulator ( 3 ) radially within the claw portions ( 2 ' ), wherein in the circumferential direction between two adjacent claw sections ( 2 ' ) a cable lug ( 8th' ) with attached cable ( 8th ), wherein the cable lug ( 8th' ) has on its outside of its strap area outside an electrical insulation, with the insulation ( 8th ) of the cable, wherein at least one of the electrical insulations of the claw sections ( 2 ' ) covered radial distance range, and wherein the free area between two adjacent claw portions ( 2 ' ) in the circumferential direction and in the axial direction smaller than the dimension of a Prüffingerspitze ( 4 ). Connection arrangement according to claim 1, characterized in that the boundary of the continuous recess ( 5 ' ) in the housing wall ( 5 ) is tapered in the axial direction or counter to the axial direction with monotonically decreasing diameter. Connection arrangement according to one of the preceding claims, characterized in that the first insulating body ( 2 ) and the second insulating body ( 3 ) made of an electrically insulating plastic, and the threaded insert ( 9 ) and the contact insert ( 1 ) are made of metal. Connection arrangement according to one of the preceding claims, characterized in that the second insulating body ( 3 ) as a positive plastic extrusion around the threaded insert ( 9 ) is made around. Connection arrangement according to one of claims 1 to 3, characterized in that the threaded insert ( 9 ) has an external thread for positive-locking screw connection in the second insulating body ( 3 ). Connection arrangement according to one of the preceding claims, characterized in that the claw sections ( 2 ' ) are regularly spaced from each other in the circumferential direction and are equally shaped. Connection arrangement according to one of the preceding claims, characterized in that on the second insulating body ( 3 ) a takedown profile ( 3 ' ) is formed for a tool, wherein the entrainment profile ( 3 ' ) is arranged centrally to the axial direction of the thread. Connection arrangement according to claim 7, characterized in that the entrainment profile ( 3 ' ) is formed as a hexagonal profile. Connection arrangement according to at least one of the preceding claims, characterized in that the contact insert ( 1 ) on its from the second insulating body ( 3 ) side facing away with a conductor track of a printed circuit board ( 6 ) is electrically connected. Connection arrangement according to claim 9, characterized in that the contact insert ( 1 ) with the printed circuit board ( 6 ) is screw-connected.

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