GB2591852A

GB2591852A - Shielding arrangement and method for assembling a shielding arrangement

Info

Publication number: GB2591852A
Application number: GB2018592.2A
Authority: GB
Inventors: Frank Sarah; Litz Alexander; Ziegler Dieter
Original assignee: Hensoldt Optronics GmbH
Current assignee: Hensoldt Optronics GmbH
Priority date: 2019-11-29
Filing date: 2020-11-26
Publication date: 2021-08-11
Anticipated expiration: 2040-11-26
Also published as: GB202018592D0; GB2591852B; DE102019132495A1

Abstract

A shielding arrangement 1 comprising: a connection cable 2 having an insulated conductor 3 and an electrically conductive cable shielding 4 that surrounds the inner conductor 3; an electrically casing 5 having at least one cable feed-through 6; an electrically conductive, hollow shielding sleeve 7 through which the connection cable is guided and which comprises in its peripheral surface 7a a through-going channel 7b; and a wedge 8 that is received in the channel and fixes the cable the shielding sleeve; wherein the shielding sleeve comprises a first sleeve region 7c that is arranged in the region of the cable feed-through; wherein the shielding sleeve comprises a second sleeve region 7d, wherein a part 4a of the shielding that protrudes beyond the shielding sleeve is folded back or over the shielding sleeve and is attached against a peripheral surface of the second sleeve region; and wherein the cable shielding is electrically connected to the structure by the shielding sleeve. The wedge and channel may have interlocking sections 10, 11 (see Figures 4 and 6).

Description

Shielding arrangement and method for assembling a shielding arrangement The invention relates to a shielding arrangement and a method for assembling a shielding arrangement of this type.

In the case of all electrical and electronic applications electromagnetic fields occur that in dependence upon the construction of the device can lead to adverse 10 electromagnetic effects It is known in order to provide an electrical connection between two or multiple components to provide plug connections and lines or a connection cable. However, it is possible, for example in the case of high current applications, for strong electromagnetic fields to occasionally occur around an electrical conductor of a connection cable. It is possible to provide a circumferential shielding or round cable shielding in order to avoid or reduce any adverse effect on the environment of the connection cable as a result of such electromagnetic fields. A cable shielding of this type can comprise an electrically conductive metal braid. In this case, it can be necessary to connect the shield of a connection cable to a structure or a casing or a mounting.

Owing to legal requirements or for example use in safety-critical applications, high demands can be placed on the electromagnetic shieldings in the case of connection arrangements, in particular in the case of connection cables connected to casings and structures. In this case, a reliable shield-contacting arrangement can also be required in the event of vibration and shock loads. Solutions known from the prior art frequently require an excessively large installation space. These are generally expensive and/or require additional strain relief arrangements on the cable in order to ensure a mechanically robust construction. The shield-contacting arrangements can often only be assembled prior to assembling the plug-in connector and comprise non-releasable connections that can only be removed by means of destruction.

DE 10 2013 218 726 B3 discloses a shielding arrangement for high current applications that comprise a connection cable having an insulated conductor and a cable shielding that surrounds the insulated conductor and also a shielding casing having a feed-through. Furthermore, the shielding arrangement comprises a hollow cylindrical-5 shaped and electrically conductive shielding sleeve. The insulated conductor is guided through the shielding sleeve. The shielding sleeve is arranged in the region of the feed-through of the shielding casing with the result that the shielding casing comes into contact with a peripheral surface of the shielding sleeve. The cable shielding lies against a peripheral surface of the shielding sleeve. The cable shielding is electrically to connected to the shielding casing by way of the shielding sleeve.

On this basis, the object of the present invention is to create a shielding arrangement of the type mentioned in the introduction that avoids the disadvantages of the prior art and that ensures an electromagnetically sealed and mechanically robust contact arrangement of the connection cable or of its cable shielding in particular while requiring a minimal installation space.

The object is achieved in accordance with the invention by means of the features mentioned in Claim 1. The object with regard to the method for assembling a shielding 20 arrangement is achieved by means of Claim 15.

A shielding arrangement is proposed in accordance with the invention, comprising: - a connection cable having at least one insulated inner conductor and an electrically conductive cable shielding that at least in part or completely surrounds the inner 25 conductor; - an at least in part or completely electrically conductive structure, in particular a casing or a mounting having at least one cable feed-through; - an at least in part or completely electrically conductive, hollow cylindrical-shaped shielding sleeve through which the connection cable is guided and which comprises in 30 its peripheral surface a through-going channel that extends in its longitudinal direction; and - a wedge that corresponds to the shape and the dimensions of the channel of the shielding sleeve and that is received in the channel and closes said channel in such a manner that the connection cable is essentially or completely fixed in its position in the shielding sleeve, - wherein the shielding sleeve comprises in the longitudinal direction a first in particular cable-side sleeve region that is arranged in the region of the cable feed-through of the 5 structure and the structure comes into contact with a peripheral surface of the first sleeve region, - wherein moreover the shielding sleeve comprises in the longitudinal direction a second in particular casing-side sleeve region, wherein a part of the cable shielding of the connection cable that protrudes beyond the shielding sleeve is folded back or folded over the shielding sleeve and is attached thereto in such a manner that it lies preferably circumferentially against a peripheral surface of the second sleeve region, and - wherein the cable shielding of the connection cable is electrically connected to the structure by way of the shielding sleeve.

By means of the shielding arrangement in accordance with the invention, an uninterrupted shielding is ensured between a shielded cable on the one hand and a structure, in particular a protective casing or shielding casing or a mounting, on the other hand which can encompass an electrical device to which conductors that are enclosed in the shielded cable are connected in order to prevent electromagnetic defects being transmitted by means of the shielded cable or to ensure electromagnetic compatibility (EMC). The shielding arrangement comprises a hollow cylindrical-shaped shielding sleeve or sleeve in order for the round cable shields to make surface contact with the casings and structures, wherein a required small installation space is combined with a strain relief arrangement. The shielding sleeve comprises an elongated channel or slit that extends in the longitudinal direction or in the direction of the height or of the axis of rotation of the hollow cylindrical-shaped shielding sleeve. The dimensions of the slit can be adapted to suit the connection cable. The shielding sleeve can be flexibly scaled for different cable diameters. The wedge that can be inserted into the channel of the shielding sleeve can have approximately the same length as the shielding sleeve. The shielding sleeve is inserted together with the assembled connection cable into the cable feed-through or a cut-out in the structure or the casing.

In an extremely advantageous manner, the shielding arrangement in accordance with the invention requires only a very small installation space. It is possible to ensure a reliable contact and thus create an EMC-proof contact to casings which also provides mechanical stability in the case of vibration loads and shock loads. The shielding arrangement in accordance with the invention is compact and easy to assemble. The wedge ensures a reliable cable clamping arrangement. The shielding sleeve can be subsequently attached to the cable, in other words it can be assembled after a plug-in connector has already been assembled. The connection cable can be provided with a plug connector or the like. The shielding arrangement can be assembled in a simple and quick manner by only one person. A movement of or a pull on the cable does not release the cable shielding. The wedge arrangement provides strain relief. Installation on a structure or a casing or a mounting bracket can be realized without the cable having to be rotated a number of times about its longitudinal axis. However, it is likewise advantageous that the connection is releasable. The first or cable-side sleeve region can form an interface to the structure. The second or casing-side sleeve region can form an interface to the cable shielding.

It is advantageous if the wedge and the channel of the shielding sleeve form a positive-locking connection, in particular on both sides in a positive-locking manner with respect to one another a step or a shoulder. In the case of a pull on the cable; the wedge can support itself by virtue of the positive-locking connection, for example on a shoulder or a step, and it is effectively prevented that the wedge and the cable slide out of the sleeve. Consequently, a positive-locking connection is formed between the wedge and the channel so as to provide strain relief.

The lateral faces of the wedge and the lateral faces of the channel of the shielding sleeve can be provided in each case with mutually corresponding elevations and depressions which preferably in conjunction with one another form the step or the shoulder. The elevations and depressions or protrusions and recesses can be provided in a complementary manner with respect to one another.

It is advantageous if the channel of the shielding sleeve tapers radially outwards. The channel or the slit in the shielding sleeve and the corresponding wedge can taper outwards. As a consequence, it is ensured that once the wedge has been positioned the wedge cannot slide in the radial direction out of the sleeve. The assembly procedure is thus made considerably easier. The geometry of the arrangement prevents the clamping wedge from falling out once it has been inserted.

The wedge can be removably arranged in the channel of the shielding sleeve.

It is hereby realized that the connection can also be assembled or released without 10 removing the plug-in connector or plug connector that is touching the connection cable.

The first sleeve region of the shielding sleeve can comprise an in part or completely circumferential groove or tongue that is configured so as to engage with a corresponding groove or tongue of the cable feed-through of the casing.

The connection cable together with the clamped-on sleeve can be inserted into a cutout in the casing, the cut-out being defined especially for the sleeve. The sleeve and the cut-out in the casing can also engage with one another using the tongue and groove principle. Consequently, the shielding sleeve is securely fixed on the casing in the pull direction of the cable. Grooves and tongues represent an EMC labyrinth arrangement. The grooves and tongues can be arranged in pairs with respect to one another by virtue of providing a transition fit, wherein electrical contact between the casing and the sleeve is ensured. In this case, it is naturally optional which part (shielding sleeve or cable feed-through or cut-out) is provided with a groove and tongue respectively.

The contour of the feed-through or cut-out or the cable feed-through can be configured in a wedge-shaped manner. The base of the groove in the sleeve can be configured either so as to correspond with this wedge-shaped contour or in a circular manner. The sleeve can be pushed into the cut-out in the casing until the two components make contact in the groove base. When the sleeve is in the end position, a tongue that can be arranged in the lower part of the cut-out can push against the wedge in the channel and consequently supports the effect of the cable tie and consequently prevents the wedge from being released.

The tongue of the cable guide or of the cut-out in the structure can be chamfered.

The tongue of the cut-out or of the cable feed-through can be chamfered. As a consequence, it is easier to insert the sleeve.

The face of the wedge that is facing the connection cable and/or the inner face of the shielding sleeve that is facing the connection cable can be provided at least in part with 10 a structuring, in particular with a thread, ribs or with a rippling.

The wedge or the shielding sleeve can be provided with ribs or the like in order to increase the frictional connection between the wedge or the shielding sleeve on the one hand and the connection cable on the other hand. The profile of the wedge or of the shielding sleeve can be structured on the cable side. The structuring can be configured for example in the radial direction or oblique direction and can provide an advantageous mechanical coupling with respect to the contact forces and/or pulling forces that are applied to the shielding sleeve.

It is possible to provide on a long-side end of the second sleeve region of the shielding sleeve a circumferential bulge that extends completely or in part in the circumferential direction and faces radially outwards. This measure produces a so-called groove in which the cable shielding can be folded over or inserted and attached there in order to ensure a circumferential contacting arrangement. Likewise, it is no longer possible to strip the attachment strip from the long-side end of the second sleeve region since the attachment strip is positioned in the region with the smallest outer diameter of the sleeve.

The part of the cable shielding of the connection cable that is folded-back or folded-over in particular also the wedge can be attached by means of a circumferential attachment strip which has in particular an adjustable circumference and which pushes the folded-back or folded-over part of the cable shielding circumferentially against the shielding sleeve or against the peripheral surface of the second sleeve region of the shielding sleeve or fixes the wedge in the channel.

The shield of the cable is pressed with a circumferential attachment strip against the sleeve. Consequently, circumferential contact is made with the shield and the wedge is fixed. As a consequence, a very good electrical contact is made over a large area, which leads to an electromagnetically sealed connection or shielding. A uniformly distributed pressure is exerted in the direction of the peripheral surface of the sleeve.

The circumferential attachment strip can be arranged in a part section of the second sleeve region between the bulge and the first sleeve region, wherein the part section of the second sleeve region has a smaller diameter than the first sleeve region or at least than its adjoining part. As a consequence, so to speak, a groove is created for receiving the cable tie or the cable shielding. Whereupon the attachment strip in the case of a correspondingly adjusted diameter can no longer be removed by passing over the sleeve.

The circumferential attachment strip can be configured as a press ring or as a cable tie. The attachment strip can be for example a cable tie embodied from a synthetic material or from a metal sheet.

The cable shielding of the connection cable can protrude beyond the shielding sleeve a predetermined amount, in particular approximately twice the dimension of the cross-section of the connection cable.

For example, the cable shielding of a connection cable having a cross-section of 7 mm could protrude by approximately 14 mm.

It is advantageous if the folded-back or folded-over part of the cable shielding of the connection cable and/or the circumferential attachment strip are covered at least in 30 part or completely by a shrinkage tube, a cap or the like The visible part of the shield and the cable tie or the attachment strip can be covered optionally by a shrinkage tube, a cap or the like. All the components are thus fixed in position. It is consequently also ensured that in addition to the insulation that the cable shield and the connection cable do not chafe and break off or loose strands fall into the device that is located in the casing.

Claim 15 discloses a method for assembling a shielding arrangement having the following steps: a) placing a connection cable into a shielding sleeve, in particular through a through-going channel that extends in the longitudinal direction of the shielding sleeve, wherein a part of the cable shielding of the connection cable protrudes a predetermined amount 10 beyond the shielding sleeve, b) inserting a wedge into the channel of the shielding sleeve, wherein the connection cable is essentially fixed in its position in the shielding sleeve, c) pushing or pressing the wedge inwards onto the cable shielding or onto an outer sheath of the connection cable, 15 d) folding the protruding part of the cable shielding back or over, e) attaching the folded-back or folded-over part of the cable shielding of the connection cable by means of a circumferential attachment strip, which has in particular an adjustable circumference, to a second sleeve region of the shielding sleeve, wherein the attachment strip pushes the cable shielding circumferentially against the shielding sleeve or against a peripheral surface of the second sleeve region of the shielding sleeve, f) inserting the shielding sleeve together with the inserted connection cable into a cable feed-through of an at least in part electrically conductive structure, wherein a completely or in part circumferential groove or tongue of a first sleeve region of the shielding sleeve and a corresponding groove or tongue of the cable feed-through of the structure engage in one another, and wherein the cable shielding of the connection cable is electrically connected by way of the shielding sleeve to the structure, g) fixing the shielding sleeve in the cable feed-through of the structure.

Following step e), the folded-back or folded-over part of the cable shielding of the connection cable and/or the circumferential attachment strip can be covered at least in part or completely by a shrinkage tube, a cap or the like.

Advantageous embodiments and developments of the inventions are disclosed in the subordinate claims.

Principles of the exemplary embodiments of the invention are described below with the 5 aid of the drawing.

In the drawings: Figure 1 illustrates a greatly simplified view of a shielding arrangement in accordance with the invention with a perspective sectional view of a shielding sleeve and a connection cable; Figure 2 illustrates a lateral view of the shielding sleeve having the connection cable; Figure 3 illustrates a plan view of the shielding sleeve having the connection cable shown in Figure 2; illustrates a perspective view of the shielding sleeve, illustrates a plan view of the shielding sleeve shown in Figure 4; illustrates a perspective view of a wedge for inserting into the shielding sleeve; Figure 4 Figure 5 Figure 6 Figures 7a -7f illustrate perspective views of the procedure of assembling the connection cable in the shielding sleeve; Figures 8a -8f illustrate perspective sectional views of the assembly procedure shown in Figures 7a to 7f; Figures 9a -9c illustrate a procedure of assembling the connection cable with the shielding sleeve in a casing; Figures 10a & 10b illustrate simplified views of a tongue and groove connection between the shielding sleeve having the connection cable on the one hand and the casing on the other hand; and Figures lla & llb illustrate different views of a shielding arrangement in accordance with the invention in the fully assembled state.

Like-functioning elements are provided with the same reference numerals in the 10 figures.

Figure 1 illustrates a simplified view of a shielding arrangement 1, comprising: - a connection cable 2 having at least one insulated inner conductor 3 and an electrically conductive cable shielding 4 that surrounds the inner conductor 3 at least in part; - an at least in part electrically conductive casing 5 as a structure having at least one cut-out or at least one cable feed-through 6 (greatly simplified and indicated by the broken line); - an at least in part electrically conductive hollow cylindrical-shaped shielding sleeve 7 20 through which the connection cable 2 is guided and which has in its peripheral surface 7a a through-going channel 7b that extends in its longitudinal direction L; and - a wedge 8 that corresponds to the shape and the dimensions of the channel 7b of the shielding sleeve 7 and that is received in the channel 7b and closes said channel in such a manner that the connection cable 2 is essentially or completely fixed in its 25 position in the shielding sleeve 7, - wherein the shielding sleeve 7 has in the longitudinal direction L a cable-side or first sleeve region 7c that is arranged in the region of the cable guide-through 6 of the casing 5 and the casing 5 comes into contact with a peripheral surface 7a of the first sleeve region 7c, -wherein moreover the shielding sleeve 7 has in the longitudinal direction L a casing-side or second sleeve region 7d, wherein a part 4a of the cable shielding 4 of the connection cable 2 that protrudes beyond the shielding sleeve 7 is folded back or folded over the shielding sleeve 7 and is attached in such a manner that it lies preferably circumferentially against a peripheral surface 7a of the second sleeve region 7d, and -wherein the cable shielding 4 of the connection cable 2 is electrically connected to the casing 5 by way of the shielding sleeve 7, In further exemplary embodiments (not illustrated), the structure can also be configured as a mounting or the like.

Figure 2 illustrates a lateral view of a shielding sleeve 7 having an inserted connection cable 2. The wedge 8 is inserted into the channel 7b that is not further illustrated in Figure 2. The part 4a of the cable shielding 4 of the connection cable 2 that protrudes beyond the shielding sleeve 7 has not yet been folded back or folded over the shielding sleeve 7.

As is apparent from Figures 1 and 2, the connection cable 2 is provided with a plug connector or a plug-in connector 2a, in other words is already assembled.

Figure 3 illustrates a plan view of the shielding sleeve 7 together with the connection cable 2.

The shielding sleeve 7 can be formed for example in part or completely from metal.

As is apparent from Figures 4 to 6, the wedge 8 and the channel 7b of the shielding sleeve 7 form a positive-locking connection, in particular on both sides in a positive-locking manner with respect to one another a step 9 or a shoulder. In the case of a pull on the connection cable 2, the wedge 8 can support itself on the step 9 or the shoulder and it is effectively prevented that the wedge 8 and the cable 2 slide out of the shielding sleeve 7.

Lateral faces 8a of the wedge 8 and the lateral faces 7e of the channel 7b of the shielding sleeve 7 are provided in each case with mutually corresponding elevations 10 or protrusions and depressions 11 or recesses which in conjunction with one another form the positive-locking connection or the step 9 or the shoulder.

Accordingly, the elevations 10 or the protrusions and the depressions 11 or recesses in the wedge 8 and the channel 7b together form the step 9 or the shoulder on which the wedge 8 supports itself. In this case, the elevation 10 of the wedge 8 corresponds with the depression 11 of the channel 7b and conversely. The elevations 10 and the depressions 11 are preferably provided on both sides of the wedge 8 and the channel 7b.

The channel 7b of the shielding sleeve 7 tapers in a radially outwards.

The wedge 8 is removably arranged in the channel 7b of the shielding sleeve 7. Thus, the connection is releasable.

As is apparent, the face 8b of the wedge 8 that is facing the connection cable 2 and/or 15 the inner face of the shielding sleeve 7 that is facing the connection cable 2 is provided at least in pad with a structuring, in particular with a thread, ribs Sc or with a rippling.

As is further apparent in Figures 2 and 4, the first sleeve region 7c of the shielding sleeve 7 comprises a completely or in pad circumferential groove 7f which is configured so as to engage with a corresponding tongue 12 of the cable feed-through 6 of the casing 5 (cf. for example Figure 9a). Naturally, in a further exemplary embodiment (not illustrated) the reverse is also possible and the shielding sleeve 7 could comprise a completely or in pad circumferential tongue and the cable feed-through 6 a corresponding groove.

As is apparent in Figures 1 to 3, a circumferential bulge 7g that extends completely or in pad in the circumferential direction and faces radially outwards is provided on a long-side end of the second sleeve region 7d of the shielding sleeve 7. As is apparent in Figures 1, 7e and 8e, the folded-back or folded-over part 4a of the cable shielding 4 of the connection cable 2 and/or the wedge 8 is attached by means of a circumferential attachment strip 13 which has in particular an adjustable circumference and which pushes the folded-back or folded-over part 4a of the cable shielding 4 circumferentially against the shielding sleeve 7 or against the peripheral surface 7a of the second sleeve region 7d of the shielding sleeve 7.

The circumferential attachment strip 13 is arranged in a part section 7h of the second sleeve region 7d between the bulge 7g and the first sleeve region 7c. The part section 5 7h of the second sleeve region 7d can have a smaller diameter than the first sleeve region 7c or at least its adjoining part 7i.

The circumferential attachment strip 13 can be configured as a press ring or as a cable tie.

The cable shielding 4 of the connection cable 2 can protrude beyond the shielding sleeve 7 a predetermined amount, in particular approximately twice the dimension of the cross-section of the connection cable 2. For example, a cable shielding 4 of a connection cable 2 having a cross-section of 7 mm could protrude by approximately 14 mm.

The folded-back or folder-over part 4a of the cable shielding 4 of the connection cable 2 and the circumferential attachment strip 13 can be covered by a shrinkage tube 14, a cap or the like (cf. Figures 1, 7f and 8f).

Figures 7a to 7f, 8a to 8f and 9a to 9c illustrate a method for assembling or producing a shielding arrangement 1.

In step a) a connection cable 2 is placed into the shielding sleeve 7, in particular through the through-going channel 7b that extends in the longitudinal direction L of the shielding sleeve 7, wherein the part 4a of the cable shielding 4 of the connection cable 2 protrudes a predetermined amount beyond the shielding sleeve 7 (cf. Figures 7a and 8a). This can be performed both with an assembled plug-in connector 2a and also without an assembled plug-in connector 2a.

In step b) the wedge 8 is inserted in particular from above into the channel 7b of the shielding sleeve 7, wherein the connection cable 2 is essentially fixed in its position in the shielding sleeve 7 (cf. Figures 7b and 8b). By virtue of the fact that the channel 7b or the slit in the shielding sleeve 7 and the wedge 8 taper radially outwards, it is possible to ensure that the wedge 8 once it has been positioned cannot slide out of the sleeve. This makes the assembly procedure easier.

As is apparent in Figures 7c and Sc, in step c) the wedge 8 is pressed inwards onto the cable shielding 4 or onto the outer sheath of the connection cable 2, whereby the connection cable is held in its position. In the case of a pull on the connection cable 2, the ribs 8c of the wedge 8 wedge even further in the shield or the outer sheath of the connection cable 2 and provide strain relief.

In step d) the protruding part 4a of the cable shielding 4 -where appropriate after the insulation has been stripped -is folded back or folded over the shielding sleeve 7 (cf. Figures 7d and 8d).

In step e) the folded-back or folded-over part 4a of the cable shielding 4 of the connection cable 2 is attached by means of the circumferential attachment strip 13, which has in particular an adjustable circumference, to the second sleeve region 7d of the shielding sleeve 7, wherein the attachment strip 13 pushes the cable shielding 4 circumferentially against the shielding sleeve 7 or against the peripheral surface 7a of the second sleeve region 7d of the shielding sleeve 7. The shield of the cable is accordingly pressed for example with a circumferential cable tie against the sleeve. In this case, circumferential contact is made with the shield and the wedge 8 is fixed. The cable tie is positioned on the smallest outer diameter of the sleeve in such a manner that it cannot be stripped from the sleeve (cf. Figures 7e and 8e).

Following step e), the folded-back or folder-over part 4a of the cable shielding 4 of the connection cable 2 and the circumferential attachment strip 13 are covered by a shrinkage tube 14, a cap or the like (cf. Figures 7f and 8f).

As is apparent in Figures 9a and 9b, in step f) the shielding sleeve 7 together with the inserted connection cable 2 is inserted into the cable feed-through 6 of the casing 5, wherein the completely or in part circumferential groove 7f of the first sleeve region 7c of the shielding sleeve 7 and the corresponding tongue 12 of the cable feed-through 6 of the casing 5 engage in one another, and wherein the cable shielding 4 of the connection cable 2 is electrically connected by way of the shielding sleeve 7 to the casing 5 by means of a press fit.

As is apparent in Figure 9c, in step g) the shielding sleeve 7 is fixed in the cable feed-through 6 of the casing 5. This can be performed for example by means of the closing a casing cover 5a.

In further exemplary embodiments (not illustrated), it is also possible conversely for the 10 shielding sleeve 7 to comprise on its first sleeve region 7c a completely or in part circumferential tongue and for the cable feed-through 6 of the casing 5 to correspondingly have a completely or in part circumferential groove.

Figure 10a illustrates a lateral sectional view of the casing 5. As is particularly apparent in the detailed view G of Figure 10a, the tongue 12 of the cable feed-through 6 of the casing 5 is chamfered. As a consequence, it is easier to insert the shielding sleeve 7. Reference is also made in this regard to the detailed view F in Figure 10b, which illustrates a front view of the casing 5 having the cable feed-through 6.

Figure 11 a illustrates a simplified sectional view along the line A-A shown in Figure llb and also a detailed view A of the casing 5 having an inserted shielding sleeve 7 and the connection cable 2. In a similar manner, Figure llb illustrates a sectional view along the line B-B shown in Figure lla and a detailed view B of a cable feed-through 6 having an inserted shielding sleeve 7 and the connection cable 2.

As is apparent from Figures 10b and 11b, the contour of the cut-out or cable feed-through 6 is wedge-shaped. The base of the groove 7f in the shielding sleeve 7 can correspond with this wedge-shaped contour. Alternatively, the groove base can be embodied in a circular manner (cf. contour 15 in the detailed view B of Figure 11 b).

The shielding sleeve 7 is pushed into the cable feed-through 6 of the casing 5 until the two components make contact with the groove base. The tongue 12 in the lower part of the cut-out or of the cable feed-through 6 can push against the wedge 8 when the shielding sleeve 7 is in the end position.

If the shielding sleeve 7 is seated firmly in the cable feed-through 6, the casing cover 5a is placed on and attached. Contact can be realized between the shielding sleeve 7, casing 5 and casing cover 5a by means of resilient sheet metal tabs. By virtue of the fixed casing cover 5a, the shielding sleeve 7 is prevented from sliding out of the casing cut-out or cable feed-through 6 and losing contact.

In order to release the connection, the casing cover 5a is removed and the shielding sleeve 7 pulled out of the cable feed-through 6 in the casing 5. Subsequently, the shrinkage tube 14 and the cable tie or the attachment element 13 are separated, the protruding part 4a of the cable shielding 4 removed from the shielding sleeve 7, the wedge 8 removed and the shielding sleeve 7 removed from the connection cable 2.

The thickness of the material can be selected only as thin as the manufacturing process allows. This leads to a shield contact mechanism that requires minimal installation space. The contour of the cable feed-through in the casing wall can become a mounting or a mounting angle. This mounting can be screwed to any electrically conductive component and make contact therewith All the components can be manufactured from electrically conductive materials.

The shielding sleeve 7, the wedge 8 and the attachment strip 13 and their mating pieces can be scaled to match any cable diameters.

List of reference numerals 1 Shielding arrangement 2 Connection cable 2a Plug-in connector 3 Inner conductor 4 Cable shielding 4a Protruding part of the cable shielding Casing 5a Casing cover to 6 Cable feed-through 7 Shielding sleeve 7a Peripheral surface of the shielding sleeve 7b Channel 7c First sleeve region 7d Second sleeve region 7e Lateral surfaces of the channel 7f Circumferential groove 7g Bulge 7h Part section of the second sleeve region 7i Adjoining part of the first sleeve region 8 Wedge 8a Lateral faces of the wedge 8b Face of the wedge that is facing the connection cable Sc Ribs of the wedge 9 Step Elevation 11 Depression 12 Tongue of the cable feed-through 13 Attachment strip 14 Shrinkage tube Contour of a circular groove base Longitudinal direction

Claims

Claims: 1. Shielding arrangement (1) comprising: -a connection cable (2) having at least one insulated inner conductor (3) and an electrically conductive cable shielding (4) that at least in part surrounds the inner conductor (3); - an at least in part electrically conductive structure, in particular a casing (5) or a mounting having at least one cable feed-through (6); -an at least in part electrically conductive, hollow cylindrical-shaped shielding sleeve (7) through which the connection cable (2) is guided and which comprises in its peripheral surface (7a) a through-going channel (7b) that extends in its longitudinal direction (L); and - a wedge (8) that corresponds to the shape and the dimensions of the channel (7b) 15 of the shielding sleeve (7) and that is received in the channel (7b) and closes said channel in such a manner that the connection cable (2) is essentially fixed in its position in the shielding sleeve (7), - wherein the shielding sleeve (7) comprises in the longitudinal direction (L) a first sleeve region (7c) that is arranged in the region of the cable feed-through (6) of the 20 structure and the structure comes into contact with a peripheral surface (7a) of the first sleeve region (7c), - wherein the shielding sleeve (7) comprises moreover in the longitudinal direction (L) a second sleeve region (7d), wherein a part (4a) of the cable shielding (4) of the connection cable (2) that protrudes beyond the shielding sleeve (7) is folded back or folded over the shielding sleeve (7) and is attached thereto in such a manner that it lies against a peripheral surface (7a) of the second sleeve region (7d), preferably circumferentially, and - wherein the cable shielding (4) of the connection cable (2) is electrically connected to the structure by way of the shielding sleeve (7).
2. Shielding arrangement (1) according to Claim 1, wherein the wedge (8) and the channel (7b) of the shielding sleeve (7) form a positive-locking connection, in particular on both sides in a positive-locking manner with respect to one another a step (9) or a shoulder.
3. Shielding arrangement (1) according to Claim 2, wherein lateral faces (8a) of the wedge (8) and the lateral faces (7e) of the channel (7b) of the shielding sleeve (7) are provided in each case with mutually corresponding elevations (10) and depressions (11) which in conjunction with one another form the step (9) or the shoulder.
4. Shielding arrangement (1) according to Claim 1, 2 or 3, wherein the channel 10 (7b) of the shielding sleeve (7) tapers radially outwards.
5. Shielding arrangement (1) according to one of Claims 1 to 4, wherein the wedge (8) is removably arranged in the channel (7b) of the shielding sleeve (7).
6. Shielding arrangement (1) according to one of Claims 1 to 5, wherein the first sleeve region (7c) of the shielding sleeve (7) comprises a completely or in part circumferential groove (7f) or tongue that is configured so as to engage with a corresponding groove or tongue (12) of the cable feed-through (6) of the casing (5).
7. Shielding arrangement (1) according to Claim 6, wherein the tongue (12) of the cable feed-through (6) of the structure is chamfered.
8. Shielding arrangement (1) according to one of Claims 1 to 7, wherein the face (8b) of the wedge (8) that is facing the connection cable (2) and/or the inner face of 25 the shielding sleeve (7) that is facing the connection cable (2) is provided at least in part with a structuring, in particular with a thread, ribs (8c) or with a rippling.
9. Shielding arrangement (1) according to one of Claims 1 to 8, wherein a circumferential bulge (7g) that extends completely or in part in the circumferential 30 direction and faces radially outwards is provided on a long-side end of the second sleeve region (7d) of the shielding sleeve (7).
10. Shielding arrangement (1) according to one of Claims 1 to 9, wherein the folded-back or folded-over part (4a) of the cable shielding (4) of the connection cable (2) is attached by means of a circumferential attachment strip (13) which has in particular an adjustable circumference and which pushes the folded-back or folded-over part (4a) of the cable shielding (4) circumferentially against the shielding sleeve (7) or against the peripheral surface (7a) of the second sleeve region (7d) of the shielding sleeve (7).
11. Shielding arrangement (1) according to Claim 10, wherein the circumferential attachment strip (13) is arranged in a part section (7h) of the second sleeve region (7d) between the bulge (7g) and the first sleeve region (7c), and wherein the part section (7h) of the second sleeve region (7d) has a smaller diameter than the first sleeve region (7c).
12. Shielding arrangement (1) according to Claim 10 or 11, wherein the 15 circumferential strip (13) is configured as a press ring or as a cable tie.
13. Shielding arrangement (1) according to one of Claims 1 to 12, wherein the cable shielding (4) of the connection cable (2) protrudes beyond the shielding sleeve (7) a predetermined amount, in particular approximately twice the dimension of the 20 cross-section of the connection cable (2).
14. Shielding arrangement (1) according to one of Claims 10 to 13, wherein the folded-back or folder-over part (4a) of the cable shielding (4) of the connection cable (2) and the circumferential attachment strip (13) can be covered by a shrinkage tube 25 (14), a cap or the like.
15. Method for assembling a shielding arrangement (1) according to one of claims 1 to 14 having the following steps: a) placing a connection cable (2) into a shielding sleeve (7), in particular through a 30 through-going channel (7b) that extends in the longitudinal direction (L) of the shielding sleeve (7), wherein a part (4a) of a cable shielding (4) of the connection cable (2) protrudes a predetermined amount beyond the shielding sleeve (7), b) inserting a wedge (8) into the channel (7b) of the shielding sleeve (7), wherein the connection cable (2) is essentially fixed in its position in the shielding sleeve (7), c) pushing or pressing the wedge (8) inward onto the cable shielding (4) or onto an outer sheath of the connection cable (2), d) folding the protruding part (4a) of the cable shielding (4) back or over the shielding 5 sleeve (7), e) attaching the folded-back or folded-over part (4a) of the cable shielding (4) of the connection cable (2) by means of a circumferential attachment strip (13), which has in particular an adjustable circumference, to a second sleeve region (7d) of the shielding sleeve (7), wherein the attachment strip (13) pushes the cable shielding (4) circumferentially against the shielding sleeve (7) or against a peripheral surface (7a) of the second sleeve region (7d) of the shielding sleeve (7), f) inserting the shielding sleeve (7) together with the inserted connection cable (2) into a cable feed-through (6) of an at least in part electrically conductive structure, wherein a completely or in part circumferential groove (7f) or a tongue of a first sleeve region (7c) of the shielding sleeve (7) and a corresponding groove or tongue (12) of the cable feed-through (6) of the structure engage in one another, and wherein the cable shielding (4) of the connection cable (2) is electrically connected by way of the shielding sleeve (7) to the structure, g) fixing the shielding sleeve (7) in the cable feed-through (6) of the structure. 20
16. Method according to Claim 15, wherein following step e) the folded-back or folder-over part (4a) of the cable shielding (4) of the connection cable (2) and the circumferential attachment strip (13) are covered by a shrinkage tube (14), a cap or the like.