Patent Grant
11043775
The invention relates to an electrical cable shield contacting device for an electrical plug connector for contacting a shielding braid of an electrical shielded sheathed cable, wherein the plug connector comprises a housing that has an at least in part cylindrical inner and outer circumference, a contact carrier that is arranged in the housing and an end cap that may be screwed onto the housing, and wherein the cable shield contacting device is designed at least in two parts and may be inserted into the housing, a clamping sleeve and a clamping cage that are designed in a corresponding hollow cylindrical manner and are arranged at least in part one engaging over the other and that clamp the shielding braid between one another at a clamping site, wherein the clamping sleeve and the clamping cage comprise sheath surfaces that are spaced away from one another in their overlapping region, said sheath surfaces forming a circumferential annular duct-shaped stowage space for receiving a length region that is part of the shielding braid and that overlaps the clamping sleeve and the clamping cage in the axial direction, the clamping sleeve and the clamping cage may be rotated with respect to one another and form with one another a coiling device for the length region that is part of the shielding braid and overlaps the clamping sleeve and/or the clamping cage in the axial direction, and the sheath surface of the clamping cage comprises a plurality of radially protruding shielding braid entraining elements that are arranged on one or multiple circular rings and extend as far as the sheath surface of the clamping sleeve.
The invention relates in addition to an electrical plug connector having a housing that has an at least in part cylindrical inner and outer circumference, a contract carrier that is arranged in the housing and an end cap that may be screwed onto the housing, and having an electrical cable shield contacting device for contacting a shielding braid of an electrical shielded sheathed cable.
Generic-type electrical plug connectors having an electrical cable shield contacting device that is designed as described in the introduction or in a similar manner are known in numerous embodiments from the prior art. By way of example, reference is made to the publications DE 201 19 898 U1, DE 10 2013 009 184 A1, DE 199 44 167 B4, DE 97 26 005 A1, EP 2 190 071 A1 and EP 1 667 284 B9.
The document EP 1 667 284 B9 thus discloses for example an electrical plug connector having a contacting device for a cable shield of an electrical cable, having a housing that has an at least in part cylindrical inner and outer circumference, having a contact carrier that is arranged in the housing, having an end cap that may be screwed onto the housing, and having two corresponding annular elements that overlap one another at least in part for contacting the cable shield, which comprise sheath surfaces that are spaced away from one another in their overlapping region and may be rotated with respect to one another and which form with one another a coiling device for coiling a length region that is part of the cable shield in a stowage space that is defined by the sheath surfaces. In this case, the inner annular element and the outer annular element are arranged engaging over the cable shield, wherein the cable shield may be folded over by 180° about an end face that is part of the inner annular element and faces in the direction of the outer annular element in such a manner that a first length region of the cable shield extends between the cable and the inner annular element. It is possible by means of the coiling device for the length region that is part of the cable shield and overlaps the axial length of the inner annular element to be coiled in the form of a spiral in the stowage space by rotating the annular elements with respect to one another. For this purpose, the sheath surface of the outer annular element comprises on the face that is facing the inner annular element a plurality of radially-protruding, bend-rigid shielding braid entraining elements that are arranged on one or multiple imaginary circular rings and that extend as far as the sheath surface of the inner annular element. The two annular elements are locked with one another in such a manner as to be able to rotate in the axial direction, wherein the shielding braid entraining elements of the outer annular elements engage with a circumferential bead that is arranged on an outer sheath of the inner annular element.
In the case of this known electrical plug connector or rather the provided contacting device, it is regarded as disadvantageous that the length region that is part of the cable shield and overlaps the axial length of the inner annular element must be cut open or debraided at least once, ideally more than once, in the axial direction, in order to be able to coil the overlapping length region in the form of a spiral into the stowage space by rotating the two annular elements with respect to one another.
Based on the above described prior art, the object of the invention is to propose a possibility whereby the length region that is part of the cable shield and overlaps the axial length of the inner and/or outer annular element may be coiled up into the stowage space without having first to cut open or debraid the cable shield in the axial direction. In this case, the contacting device is to have a particular simple and cost-effective structure, and in particular be simple to assemble on a cable that comprises a cable shield and in addition be able to produce an electrically particularly reliable shield contacting arrangement.
This object is achieved in accordance with the invention by means of an electrical cable shield contacting device for an electrical plug connector for contacting a shielding braid of an electrical shielded sheathed cable in accordance with the independent claim 1 and by means of an electrical plug connector that comprises an electrical cable shield contacting device in accordance with the co-ordinated claim 7. Further advantageous embodiments are disclosed in the respective related claims.
Accordingly, in the case of the electrical cable shield contacting device in accordance with the invention for an electrical plug connector for contacting a shielding braid of an electrical shielded sheathed cable, the outer sheath surface of the clamping sleeve comprises on a front sleeve end that is engaged by the clamping cage one or multiple circumferential annular grooves, annular collars and/or annular steps into which and/or behind which the shielding braid entraining elements of the clamping cage engage and latch the clamping cage with the clamping sleeve. Consequently, the shielding braid entraining elements extend beyond the clamping cage not only as far as the outer sheath surface of the clamping sleeve but rather further beyond. It is preferred that the clamping cage comprises a number of shielding braid entraining elements that are arranged on one or multiple circumferential circular tracks, wherein in the case of multiple circular tracks and the annular grooves, annular collars and/or annular steps that are provided, these are formed in a corresponding manner on the clamping sleeve and the clamping cage and comprise preferably in each case an equivalent spacing between one another.
This cable shield contacting device comprises multiple parts, preferably two parts, and is formed by a clamping sleeve and a clamping cage that are configured in a correspondingly hollow cylindrical manner and are arranged at least in part one engaging over the other. In addition, it is also possible to provide as an alternative a further part for the shielding arrangement. The clamping sleeve and the clamping cage comprise sheath surfaces that are spaced away from one another in their overlapping region and define a circumferential annular duct-shaped stowage space for receiving a length region that is part of the shielding braid and overlaps the clamping sleeve in the axial direction. The clamping sleeve and the clamping cage may be continuously rotated with respect to one another in both the clockwise and anti-clockwise direction and together form a coiling device for the length region that is part of the shielding braid and overlaps the clamping sleeve and/or the clamping cage in the axial direction. A number of radially-protruding, preferably bend-rigid shielding braid entraining elements that are arranged on one or multiple circular rings are formed on the inner sheath surface of the clamping cage that engages the clamping sleeve outside at least in part and, as the clamping sleeve is rotated with respect to the clamping cage or the clamping cage is rotated with respect to the clamping sleeve, said shielding braid entraining elements act on the shielding braid via the clamping sleeve and/or via the clamping cage and coil the axially overlapping length region of the shielding braid into the stowage space. In this case, the shielding braid entraining elements that protrude inward from the clamping cage may be arranged either on an in itself closed, dimensionally-stable sheath surface of the clamping cage or on sheath surface segments that are part of the clamping cage and may be deflected in the radial direction. Such shielding braid entraining elements that are configured flexible and able to deflect in the radial direction may compensate larger cable diameters that are larger or equal to the inner diameter of the clamping cage.
The electrical cable shield contacting device in accordance with the invention may be inserted into a housing of an electrical plug connector for contacting the shielding braid of the electrical shielded sheathed cable, wherein the plug connector comprises a housing that has an at least in part cylindrical inner and outer circumference, a contact carrier that is arranged in the housing and an end cap that may be screwed onto the housing and fixes the cable shield contacting device in the housing in a positionally-stable manner in the axial and circumferential direction. In the state inserted into the housing, the end cap that may be screwed to the housing applies force to the clamping cage in the axial direction and holds said clamping cage against the clamping sleeve in the axial direction, said clamping sleeve supporting itself inside against the housing. This reinforces the clamping arrangement of the shielding braid at the clamping site between the clamping sleeve and the clamping cage.
In a favorable manner, the at least one annular groove of the clamping sleeve and the shielding cable carriers of the clamping cage have a shape that matches one another in particular in their cross-section, in such a manner that the shielding braid entraining elements extend with a slight air gap to the base of the annular groove in the associated annular groove. Consequently, the individual wires of the shielding braid rotate safely with respect to one another at the same time as the clamping sleeve and the clamping cage rotate with the result that said individual wires may be reliably coiled in the form of a spiral into the stowage space.
In principle, the shielding braid entraining elements may have any geometric shape. It has proven to be particularly favorable for the shielding braid entraining elements to be symmetrical, i.e., mirror-inverted, in the circumferential direction and with a tip at the free end, by way of example to be conical- or pyramid-shaped. Consequently, the length region of the shielding braid that is to be coiled may be coiled into the stowage space either in a clockwise direction or in an anti-clockwise direction. It is preferred that the shielding braid entraining elements, which are part of the clamping cage and protruding radially in the direction of the clamping sleeve are formed on the clamping cage, are designed in the shape of a pyramid. Consequently, said shielding braid entraining elements are not only symmetrical in the circumferential direction of the clamping cage but rather they comprise in addition an entraining tip that as the cable shield contacting device connects with the electrical shielded sheathed cable penetrates into the shielding braid, which it punctures and thus ensures that the shield wires of the cable shield are drawn into the stowage space and coiled without any problem, wherein it is possible to debraid part of the shielding braid.
In the case of a preferred embodiment of the invention, the clamping sleeve comprises two shell-shaped, in particular semi-shell-shaped, sleeve parts. Consequently, these are particularly simple and cost-effective to manufacture. In the case of favorable variants, said sleeve parts are connected to one another in an articulated manner, by way of example by means of a hinge, and are designed so as to be able to latch with one another. Consequently, the assembly procedure is also facilitated.
In the case of an embodiment of the cable shield contacting device in accordance with the invention, the clamping cage comprises on its end face facing the clamping sleeve a circumferential end profiling for fixing in a rotation-resistant manner in the housing, said profiling comprising a plurality of mutually adjacent depressions and elevations that form a closed profiled annular ring. In the case of a further preferred embodiment of the cable shield contacting device in accordance with the invention, the clamping sleeve comprises in a middle region a circumferential annular step and/or a circumferential annular collar against which the end profiling of the clamping cage is in contact and can support itself there. The combination of the two above described special embodiments have proven to be particularly favorable. The depressions of the profiled annular ring that is arranged on the end face are designed in the circumferential direction preferably with a tooth-shaped cross-section. Thus, as the electrical cable shield contacting device is assembled, i.e. as it is attached to and connected to the electrical shielded sheathed cable, the wires of the shielding braid of the cable shield that overlap the clamping sleeve and/or the clamping cage in the axial direction may be fed through the depressions of the profiled annular ring in a simple manner and subsequently are introduced into the circumferential annular duct-shaped stowage space by means of the coiling device.
In the case of an advantageous embodiment, the end profiling protrudes in the radial direction beyond the annular step or the annular collar. The radial overlap renders it possible to provide support in a particularly simple and effective manner and in conjunction with the provided means of protection against rotation also renders it possible to connect in a rotation-resistant manner the electrical cable shield contacting device that is arranged in the housing.
In the case of a favored embodiment of the electrical cable shield contacting device in accordance with the invention, apart from the depressed annular grooves and the protruding shielding braid entraining elements, the sheath surfaces of the clamping sleeve and of the clamping cage are designed in their overlapping region with smooth walls. Consequently, the length region that is part of the shielding braid and overlaps the clamping sleeve and/or the clamping cage is prevented from becoming hooked in as it is coiled in the stowage space and in addition the procedure of feeding in said length region is facilitated.
In the case of the proposed cable shield contacting device, the clamping sleeve and/or the clamping cage are designed as metal molded parts or from synthetic material. In the case of a preferred embodiment of the invention, the clamping sleeve and the clamping cage of the cable shield contacting device are designed as a synthetic material molded body. The shielding arrangement is contacted in this case via the metal housing. On the one hand, the insulating clamping sleeve prevents an undesired electrical contact with the electrical contacts of the contact carrier or with the non-insulated connection sites of the cables of the sheathed cable and on the other hand renders it possible to manufacture the synthetic material molded part in a cost-effective manner.
The electrical plug connector in accordance with the invention comprises an electrical cable shield contacting device in accordance with the invention as described above. This cable shield contacting device is arranged in a housing that has an at least in part cylindrical inner and outer circumference and in which at least one single-pin contact carrier is arranged. The housing comprises an end cap that may be screwed on and traps and holds the cable shield contacting device in a positionally-secure manner in the housing for contacting a shielding braid of an electrical shielded sheathed cable and the contact carrier, to which the at least one inner cable that is shielded from the shielding braid may be connected. Furthermore, the housing of the electrical plug connector may comprise a rotating locking sleeve for fixing in a vibration-resistant and sealed manner on a counter plug part. It is preferred in this case that, when the cable shield contacting device is inserted into the housing, the clamping sleeve having the annular collar is supported on a counter bearing of the housing in an unshiftable manner in the axial direction, wherein the clamping cage having the end profiling lies against a counter profiling of the housing in a non-rotatable manner in the circumferential direction. As a consequence, the cable shield contacting device that is inserted into the housing is fixed in the housing in a non-movable manner in the axial direction and in the circumferential direction by means of the end cap that is screwed onto the housing.
The features mentioned above in the description and feature combinations and also the features that are mentioned below in the description of the figures and/or are illustrated alone in the figures and feature combinations are not only useable in their respective described combination but rather may also be used in other combinations or as standalone. It is not necessary to realize all the features of claim 1 in order to implement the invention. Individual features of the independent or coordinate claims may also be replaced by other disclosed features or feature combinations.
All the features that arise from the claims, the description or the drawing and/or advantages, including constructive details, spatial arrangement and method steps may be essential for the invention both as standalone and also in the most varied combinations. In the figures, like or similar components are provided with like or similar reference numerals.
The invention is further explained below with reference to exemplary embodiment illustrated in the accompanying drawing. In a schematic view:
The clamping sleeve 11 and the clamping cage 12 are designed in a corresponding hollow cylindrical manner and are arranged at least in part one engaging over the other. As illustrated in
The cable shield contacting device 7 is designed in two parts and may be inserted into the housing 4. Said cable shield contacting device comprises the clamping sleeve and the clamping cage 12 that are designed in a corresponding hollow cylindrical manner and that are arranged, as illustrated in
In this case, the clamping sleeve 11 and the clamping cage 12 may be rotated with respect to one another and form with one another a coiling device 24 for the length region 23 that is part of the shielding braid 8 and overlaps the clamping sleeve 11 and/or the clamping cage in the axial direction. A plurality of radially-protruding, bend-rigid shielding braid entraining elements 25 that are arranged on an imaginary circular ring and extend as far as the outer sheath surface 21 of the clamping sleeve 11 are formed on the inner sheath surface 21′ of the clamping cage 12, as illustrated in
The clamping cage 12 comprises on its end face 28 that faces the clamping sleeve 11 a circumferential end profiling 29 for fixing in a rotation-resistant manner in the housing 4, said profiling comprises a plurality of mutually adjacent depressions 30 and elevations 31 that form a closed profiled annular ring 29′. Furthermore, the clamping sleeve 11 comprises in a middle region outside a circumferential annular step 32 and/or a circumferential annular collar 32 against which the end profiling 29 of the clamping cage 12 is in contact when the cable shield contacting device 7 is in the assembled state. As
According to
According to
The elevations 31 of the profiled annular ring 29′ are in this case in contact with the annular collar or the annular step 32 of the clamping sleeve 11 with the result that the shielding braid 8 is not clamped in at this site. Consequently, by rotating the clamping sleeve 11 with respect to the clamping cage 12 or by rotating the clamping cage 12 with respect to the clamping sleeve 11, the length region 23 that is part of the shielding braid 8 and overlaps the clamping cage 12 in the axial direction may be coiled entirely or in part into the stowage space 22 electrical cable shield contacting device 7 by means of the coiling device 24. After coiling in the form of a spiral the length region 23 that is part of the shielding braid 8 and forming the connection of the plug contacts 33 of the contact carrier 5 to the central cables of the sheathed cable 9, not illustrated in the figures, said cables being encompassed by the shielding braid 8, the cable shield contacting device 7 that is in electrically conductive contact with the shielding braid 8 at a clamping site 16 may be inserted according to
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018/5006 | Jan 2018 | BE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2018/085795 | 12/19/2018 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2019/134828 | 7/11/2019 | WO | A |
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| Number | Date | Country |
|---|---|---|
| 197 26 005 | Feb 1999 | DE |
| 201 19 898 | Mar 2002 | DE |
| 199 44 167 | Aug 2008 | DE |
| 10 2013 009 184 | Dec 2014 | DE |
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| Number | Date | Country | |
|---|---|---|---|
| 20200358209 A1 | Nov 2020 | US |
