DE102017113415A1 - ADAPTER FOR A LINE OF TRANSMISSION OF A TRANSMITTER OF A MOTOR VEHICLE - Google Patents

Abstract

The invention relates to an adapter (2) for a wiring harness (1) of a vehicle electrical system, in particular a high-voltage vehicle electrical system, of a motor vehicle, comprising a shielded adapter housing (5); a first housing-side entry region (8) for at least one shielded conductor (4), in which a screen (10) of the shielded conductor (4) with the adapter housing (5) is connectable to the screen transfer and through which an inner conductor (12) of the shielded conductor (4) into the adapter housing (5) is insertable; a housing-side mechanical interface (13) for attaching an EMC filter (3) to the adapter housing (5) and a second housing-side inlet region (14) for inserting at least one unshielded conductor (15) of the EMC filter (3) in the adapter housing ( 5), so that therein the unshielded conductor (15) of the EMC filter (3) and the inner conductor (12) of the shielded conductor (4) are contactable with each other.

Description

Technical area

The invention relates to an adapter for a wiring harness of a vehicle electrical system of a motor vehicle and a wiring harness for a vehicle electrical system of a motor vehicle.

State of the art

In particular, wiring harnesses for high-voltage vehicle electrical systems or hybrid vehicles must be shielded, since high-voltage components such as the power electronics for the electric drive or air compressors emit large electromagnetic interference. Such electromagnetic interference can lead to problems in the vehicle electronics. Such electromagnetic interference can be eliminated with known EMC filters, which are designed for such high-voltage vehicle electrical system. The advantage of using such EMC filters is that the wiring harness can be unshielded as such. As a result, weight can be saved on the one hand and on the other unshielded cable sets are more flexible and thus easier to lay in the vehicle.

Such EMC filters are usually integrated directly into the relevant units or installed directly on the units. For example, shows the DE 103 26 255 A1 an electric motor, wherein the suppression of the electric motor on the outside of the motor housing of the electric motor, a designated as suppressor EMC filter is mounted. In order to attach EMC filters directly to such aggregates, specific interfaces between the relevant unit and the EMC filter to be used must often be provided. In addition, it can also happen that often such EMC filters for technical reasons can not be mounted directly in or on such aggregates.

Description of the invention

It is therefore an object of the present invention to provide a technical solution by means of which electromagnetic interference within cable sets for vehicle electrical systems of motor vehicles can be prevented in a particularly simple manner.

This object is achieved by an adapter for a wiring harness of a vehicle electrical system having the features of patent claim 1. Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the dependent claims.

The adapter according to the invention for a wiring harness of a vehicle electrical system, in particular a high-voltage vehicle electrical system, of a motor vehicle comprises a shielded adapter housing. Furthermore, the adapter according to the invention comprises a first housing-side entry region for at least one shielded conductor, in which the screen transfer of a shield of the shielded conductor with the adapter housing is connectable and through which an inner conductor of the shielded conductor is inserted into the adapter housing. Furthermore, the adapter according to the invention has a housing-side mechanical interface for attaching an EMC filter to the adapter housing. In addition, the adapter according to the invention comprises a second housing-side inlet region for introducing at least one unshielded conductor of the EMC filter in the adapter housing, so that therein the unshielded conductor of the EMC filter and the inner conductor of the shielded conductor are contactable with each other.

So that the adapter housing is designed to be shielded, this is preferably formed in the form of a metal housing. However, other designs are also possible as long as the shielding is achieved with regard to the required electromagnetic compatibility. The shielded adapter housing and the shielding of the shielded conductor thus contribute to the fact that the environment is protected from radiation of electric, magnetic and / or electromagnetic fields. Preferably, a continuously closed electrical contact between the shield of the shielded conductor and the metallic adapter housing takes place.

The first housing-side inlet region is thus designed such that the shield of the shielded conductor can preferably be electrically connected in a gap-free manner to the adapter housing. In this way it can be ensured that a reliable shield transfer can take place when the shielded conductor is inserted through the first housing-side entry region into the adapter housing. Through the second housing-side inlet region, the EMC filter which can be connected via the housing-side mechanical interface, more precisely the unshielded conductor of the EMC filter, can be contacted with the inner conductor of the shielded conductor. By means of the adapter according to the invention, therefore, a particularly simple possibility is provided to integrate cable-set EMC filters in electrical systems. Due to the shielded adapter, EMC filters can be installed relatively flexibly in a motor vehicle. By means of the solution according to the invention, inexpensive standard EMC filters without vehicle manufacturer-specific interfaces can be used. In addition, conventional aggregate connector, for example Power electronics or even for air conditioning compressors and the like, without requiring modifications continue to be used.

An advantageous embodiment of the invention provides that the EMC filter on the mechanical interface by means of at least one screw on the adapter housing can be fastened. As a result, the EMC filter can be attached to the adapter housing in a particularly simple manner if required. The screw connection can also ensure that the EMC filter is coupled to the adapter housing in such a way that reliable shielding can be ensured. Furthermore, a re-releasable connection between the EMC filter and the adapter housing can be ensured in a particularly simple manner via the at least one screw connection.

A further advantageous embodiment of the invention provides that the first housing-side inlet region has an electrically conductive socket embedded in the adapter housing for screen transfer from the screen of the shielded conductor to the adapter housing. By means of the socket can be ensured in a simple manner that the shielded conductor is at least substantially gap-free, preferably completely gap-free, surrounded by the socket. This allows a particularly reliable screen transfer from the screen of the shielded conductor to the adapter housing.

According to a further advantageous embodiment of the invention, it is provided that the socket has an annular region for gap-free enclosing the shield of the shielded conductor. When inserting the shielded conductor into the first housing-side inlet region, the annular region of the bush can thus enclose the shielding of the shielded conductor gap-free. For example, the annular region can also be slightly conical so that the shielded conductor can be pressed against the annular region. As a result, a gap-free enclosing the shield of the shielded conductor can be ensured in a particularly simple manner.

In a further advantageous embodiment of the invention, it is provided that the socket has a stepped shoulder, which serves as an axial boundary for the introduced into the adapter housing shielding the shielded conductor. On the one hand, the step-shaped heel ensures that the shielded conductor is inserted correctly into the adapter housing. On the other hand, the step-shaped shoulder can additionally serve to connect the shielding of the shielded conductor in an electrically conductive manner even without a gap to the adapter housing. This helps to produce a particularly good electromagnetic compatibility.

In a further advantageous embodiment of the invention, it is provided that at least a part of the socket is pressed into the adapter housing. This can be ensured in a simple manner that the socket fills a correspondingly provided opening in the first housing-side inlet region of the shielded adapter housing gap-free. Instead of pressing the bush, it would alternatively be possible for the bushing to be screwed into, for example, a correspondingly provided thread of the adapter housing. Basically, all types of mounting the socket within the adapter housing are suitable, which ensure that the socket can be inserted so gap-free in the adapter housing that a sufficient electromagnetic compatibility can be ensured.

According to a further advantageous embodiment of the invention, it is provided that the bushing has a press-fitted into the adapter housing Einpressbuchse and a support sleeve around which a longitudinal end of the shield is folded, the Einpressbuchse and the support sleeve are arranged interleaved in such a way that the folded longitudinal end the shield between the support sleeve and the Einpressbuchse is arranged. The support sleeve may for example be stepped in longitudinal section and the press-in bushing substantially L-shaped. As a result, the support sleeve and the press-fit sleeve can be pushed into one another and thereby interleaved, whereby the folded around the support sleeve end of the shield between the support sleeve and the press-fit is arranged. By this arrangement, a particularly gap-free screen transfer from the shield to the adapter housing can be done.

A further advantageous embodiment of the invention provides that the adapter housing has a box-shaped lower part for receiving the conductor of the EMC filter and the inner conductor of the shielded conductor and a lid for closing the lower part. If necessary, the lid can be opened in a simple manner, whereby the recorded in the box-shaped base conductor, so the conductor of the EMC filter and the inner conductor of the shielded conductor can be contacted with each other in a particularly simple manner. Subsequently, the lid can be closed again, so that the electromagnetic compatibility of the closed adapter housing can be ensured.

According to a further advantageous embodiment of the invention, it is provided that the Adapter housing has at least one EMC gasket, by means of which, when the lid is closed, a gap between the lower part and the lid sealed and an electrical connection between the lower part and the lid is made. By means of the at least one EMC seal thus openings or gaps are geometrically covered, so that, for example, manufacturing tolerances in the lower part and the lid can be compensated. In particular, the EMC seal ensures electrical connection of open edges between the base and the lid.

In a further advantageous embodiment of the invention, it is provided that the adapter housing has at least one seal, by means of which, when the lid is closed, a gap between the lower part and the lid is sealed watertight. The said seal and the aforementioned EMC seal may be formed as separate parts. Viewed from the inside outwards, for example, the EMC gasket can first be arranged and the gasket attached behind it, which serves to make the lower part and the cover watertight. Alternatively, it is also possible that one or more hybrid seals are used, which are responsible for both the electromagnetic compatibility and for waterproofness. For example, an elastomer may be filled with conductive particles. The conductivity can be ensured for example by metallic wires, films or metallized textiles. Depending on the geometry of the base and cover of the adapter housing separate seals for electromagnetic compatibility and waterproofness or said hybrid seals may be used.

A further advantageous embodiment of the invention provides that the adapter housing is lined on the inside with an electrical insulation. In particular, if the adapter is used for a high-voltage vehicle electrical system, this is important to ensure the safety of the adapter.

The wiring harness according to the invention for an electrical system, in particular for a high-voltage electrical system, of a motor vehicle comprises the adapter according to the invention or an advantageous embodiment of the adapter according to the invention, to which an EMC filter is attached. In other words, the line set according to the invention is one or more line-connected EMC filters.

list of figures

Further advantages, features and details of the invention will become apparent from the following description of a preferred embodiment and from the drawing. The features and feature combinations mentioned above in the description as well as the features and feature combinations shown below in the description of the figures and / or in the figures alone can be used not only in the specified combination but also in other combinations or in isolation, without departing from the scope of the invention ,

• 1 einen perspektivischen Ausschnitt eines Leitungssatzes für ein Hochvolt-Bordnetz eines Kraftfahrzeugs, wobei der Leitungssatz einen Adapter aufweist, an welchem ein EMV-Filter angebracht ist und zwei in den Adapter hineinragende Stromschienen des EMV-Filters mit jeweiligen Innenleitern eines geschirmten Leiters kontaktiert sind, die in den Adapter eingeführt worden sind; und in
• 2 eine vergrößerte Perspektivansicht des Adapters, wobei ein gehäuseseitiger Eintrittsbereich des Adapters im Detail dargestellt ist, in welchen die beiden geschirmten Leiter eingeführt worden sind.

The drawing shows in:

• 1 a perspective section of a wiring harness for a high-voltage electrical system of a motor vehicle, wherein the wiring harness has an adapter to which an EMC filter is mounted and two projecting into the adapter busbars of the EMC filter with respective inner conductors of a shielded conductor are contacted, in the adapter has been inserted; and in
• 2 an enlarged perspective view of the adapter, wherein a housing-side inlet region of the adapter is shown in detail, in which the two shielded conductors have been introduced.

A small section of a wiring harness 1 for a high-voltage electrical system of a motor vehicle is in a perspective view in 1 shown. The wiring harness 1 includes an integrated adapter in this 2 , to which, according to the present illustration from the right, an EMC filter 3 is appropriate. From the left, two shielded conductors protrude 4 in the adapter 2 into it. The adapter 2 includes a metallic adapter housing 5 , which is a box-shaped lower part 6 and a lid 7 having.

According to the present perspective, the adapter 2 on the left a first housing-side inlet area 8th through which the two shielded conductors 4 in the adapter housing 5 are introduced. In the first housing-side entry area 8th are two metallic sockets 9 arranged. The metallic sockets 9 serve for shielding a shielding 10 the shielded conductor 4 , Next to the shield 10 assign the shielded conductors 4 another isolation 11 , an inner conductor 12 and on the outside an outer jacket 22 on. As can be seen, the inner conductors extend 12 to the unspecified interior of the adapter housing 5 ,

Opposite the first housing-side entrance area 8th there is a housing-side mechanical interface 13 for attaching the EMC filter 3 on the adapter housing 5 , For example, the EMC filter 3 on the housing-side mechanical interface 13 attached and with the metallic adapter housing 5 be screwed. On the same side as the enclosure-side mechanical interface 13 there is a second housing-side inlet area 14 through which two busbars 15 the EMC filter 3 inside the metallic adapter housing 5 are introduced. The busbars 15 can completely through the interior of the EMC filter 3 extend, for example, here not shown coils and / or ferrite cores within the EMC filter 3 can be provided so that can be filtered out by means of these unwanted electromagnetic interference.

Inside the adapter 2 are the inner conductors 12 via cable lugs 16 and screws 17 with the busbars 15 electrically connected. Instead of the cable lugs 16 and the screws 17 Any other contacts can be used for this purpose. The shielded cables 4 For example, they may be connected to power electronics, with the EMC filter 3 over the busbars 15 can be connected, for example, with a high-voltage battery through the intermediary of other cables not shown here. By providing the EMC filter 3 can the wiring harness 1 as shown to the right of the EMC filter 3 be executed unshielded. Because if necessary within the shielded conductor 4 Any existing electromagnetic interference can be detected by means of the EMC filter 3 be filtered out, so that the output side of the EMC filter 3 no shielded conductors are required anymore.

To the connection between the inner conductors 12 the shielded conductor 4 and the busbars 15 the EMC filter 3 especially easy to make, the lid can 7 of the metallic adapter housing 5 if necessary, removed or at least opened. For example, the lid 7 via screw connections, not shown here again detachable with the box-shaped lower part 6 of the adapter housing 5 get connected. To a gap-free closing of the lid 7 to be able to ensure, for example, in unspecified recesses of the lid 7 used EMC gaskets 18 be provided. When closing the lid 7 ensure the EMC seals 18 for being inside the metallic adapter housing 5 arranged inner conductor 12 and the busbars 15 reliably shielded from the outside.

For the EMC gaskets 18 For example, they may be so-called hybrid seals, which on the one hand ensure that the adapter housing 5 Electromagnetically shielded to the outside and on the other hand is also kept waterproof. Contrary to the present illustration, it is also possible that pure EMC gaskets and pure seals not shown here are provided, which for the waterproofness of the adapter housing 5 to care. In addition, the adapter housing 5 inside still with an insulation 19 lined. The wiring harness 1 is used as already mentioned in a high-voltage electrical system of a motor vehicle. Due to the high voltages and currents is a reliable insulation of the adapter 2 therefore particularly important. This represents the inside of the adapter 2 attached insulation 19 for sure.

In 2 is the first housing-side entry area 8th through which the two shielded conductors 4 inside the adapter housing 5 are shown in an enlarged perspective view. In the present illustration is again the structure of the shielded conductor 4 good to see which each the inner conductor 12 show that from the insulation 11 surrounded, in turn, by the shielding 10 which is surrounded by the outer shell 22 is surrounded. The previously mentioned, in the region of the first housing-side inlet area 8th in the adapter housing 5 pressed bushes 9 are clearly visible in the present case.

The sockets 9 are constructed in two parts and have one in the adapter housing 5 pressed-in bushing 9a and a support sleeve 9b on. The respective shieldings 10 are in the radial direction between a respective annular region 20 the support sleeves 9b and the insulation 11 arranged. Furthermore, they are in the adapter housing 5 projecting ends of the shields 10 around the support sleeves 9b turned so that the shields 10 in this area in the radial direction between the respective support sleeves 9b and press-fit bushes 9a are arranged. The press-in bushes 9a and the support sleeves 9b are arranged stepwise nested. The support sleeves 9b each still have a stepped shoulder 21 on. These paragraphs 21 can be used as an axial stop for the support sleeves 9b serve around which the shields 10 have turned over. Contrary to the present presentation, it is also possible that the jacks 9 executed in one piece and, for example, also in the adapter housing 5 be pressed.

In the first housing-side entrance area 8th are also still caps 23 used. Here unspecified through openings of the caps 23 are dimensioned in terms of their diameter so that the shielded conductors 4 together with their outer coats 22 through the passage openings of the caps 23 fit.

The support sleeves 9b have according to the present illustration on the left - ie on the interior of the adapter housing 5 opposite side - still unspecified here stepped stop, which as an axial boundary for the outer shells 22 serves.

By the first housing-side inlet area 8th pressed bushes 9 can be reliably ensured that the shields 10 the shielded conductor 4 gap-free with the metallic adapter housing 5 be contacted. This can ensure that with the shielded conductors 4 on the adapter 2 incoming electromagnetic interference not in the range of the adapter 2 can escape. Instead, by the electrical contacting of the inner conductor 12 with the busbars 15 the on the adapter 2 incoming electromagnetic interference in the direction of the EMC filter 3 forwarded, which filters out the electromagnetic interference.

Using the shielded adapter 2 EMC filters can be relocated relatively flexibly in a vehicle. Due to the cable-bound EMC filters 3 Particularly inexpensive standard filters without vehicle-specific interfaces can be used. Due to the sockets used 9 In addition, there is a very good shield connection in the area of the adapter 2 concerning the shielded conductors 4 allows. The adapters 2 So ensure that EMC filters can be used particularly flexible in wiring harnesses for electrical systems, especially for high-voltage vehicle electrical systems, of motor vehicles with a particularly good electromagnetic compatibility.

LIST OF REFERENCE NUMBERS

1

Cable set for a high-voltage electrical system of a motor vehicle

2

adapter

3

EMC filters

4

shielded conductor

5

metallic adapter housing

6

box-shaped lower part

7

cover

8th

first housing-side inlet area

9

metallic socket

9a

selfclinching

9b

support sleeve

10

shielding

11

insulation

12

inner conductor

13

Housing-side mechanical interface

14

second housing-side inlet area

15

conductor rail

16

lug

17

screw

18

EMC seal

19

insulation

20

annular area

21

stepped heel

22

outer sheath

23

cap

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10326255 A1 [0003]

Claims (12)

Adapter (2) for a wiring harness (1) of a vehicle electrical system, in particular a high-voltage vehicle electrical system, comprising a motor vehicle - A shielded adapter housing (5); - A first housing-side inlet region (8) for at least one shielded conductor (4), in which for shield transfer a shield (10) of the shielded conductor (4) with the adapter housing (5) is connectable and through which an inner conductor (12) of the shielded Ladder (4) in the adapter housing (5) can be inserted; - A housing-side mechanical interface (13) for fixing an EMC filter (3) on the adapter housing (5); - A second housing-side inlet region (14) for introducing at least one unshielded conductor (15) of the EMC filter (3) in the adapter housing (5), so that therein the unshielded conductor (15) of the EMC filter (3) and the inner conductor (12) of the shielded conductor (4) are contactable with each other. Adapter (2) to Claim 1 , characterized in that the EMC filter (3) on the mechanical interface (13) by means of at least one screw on the adapter housing (5) can be fastened. Adapter (2) to Claim 1 or 2 , characterized in that the first housing-side inlet region (8) in the adapter housing (5) embedded electrically conductive socket (9) for screen transfer from the screen (10) of the shielded conductor (4) on the adapter housing (5). Adapter (2) to Claim 3 , characterized in that the bushing (9) has an annular region (20) for gap-free enclosing the shield (10) of the shielded conductor (4). Adapter (2) to Claim 3 or 4 , characterized in that the bushing (9) has a step-shaped shoulder (21), which serves as axial limitation for the in the adapter housing (5) introduced shielding (10) of the shielded conductor (4). Adapter (2) according to one of Claims 3 to 5 , characterized in that at least a part of the bushing (9) is pressed into the adapter housing (5). Adapter (2) according to one of Claims 3 to 6 , characterized in that the bushing (9) has a press-fit bushing (9a) pressed into the adapter housing (5) and a support sleeve (9b) about which a longitudinal end of the shielding (10) is turned over, wherein the press-fit bushing (9a) and the Support sleeve (9b) are arranged interleaved in such a way that the folded longitudinal end of the shield (10) between the support sleeve (9b) and the Einpressbuchse (9a) is arranged. Adapter (2) according to one of the preceding claims, characterized in that the adapter housing (5) has a box-shaped lower part (6) for receiving the unshielded conductor (15) of the EMC filter (3) and the inner conductor (12) of the shielded conductor ( 4) and a lid (7) for closing the lower part (6). Adapter (2) to Claim 8 , characterized in that the adapter housing (5) has at least one EMC seal (18), by means of which with the lid closed (7) a gap between the lower part (6) and the lid (7) sealed and an electrical connection between the lower part (6) and the lid (7) is produced. Adapter (2) to Claim 8 or 9 , characterized in that the adapter housing (5) has at least one seal, by means of which, when the lid (7) is closed, a gap between the lower part (6) and the lid (7) is sealed watertight. Adapter (2) according to one of the preceding claims, characterized in that the adapter housing (5) is lined on the inside with an electrical insulation (19). Cable set (1) for a vehicle electrical system, in particular for a high-voltage vehicle electrical system, of a motor vehicle with at least one adapter (2) according to one of the preceding claims, to which an EMC filter (3) is attached.

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