Abstract
An electric cable shield contacting device for an electric plug connector, and to an electric plug connector having such a cable shield contacting device, wherein the plug connector has an at least partly hollow cylindrical housing having a contact carrier accommodated therein, and having an end cap that can be screwed onto the latter. The cable shield contacting device has a clamping sleeve and a clamping basket, which are correspondingly hollow-cylindrical and engage partly over each other in order to clamp the shield braid between themselves, having a circumferential stowage space for projecting shield braid in the overlap area. The inner circumferential surface of the clamping basket has multiple projecting shield braid driving elements arranged in the form of a circular ring, which engage in a circumferential annular groove on the outer circumferential surface of the clamping sleeve and thus latch clamping basket and clamping sleeve rotatably in each other.
Claims
1. 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, comprises a clamping sleeve and a clamping cage that are designed in a corresponding 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, 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 wherein in the 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 engage, and rotatably latch the clamping cage with the clamping sleeve.
2. The electrical cable shield contacting device as claimed in claim 1, wherein the shielding braid entraining elements are designed in the shape of a pyramid.
3. The electrical cable shield contacting device as claimed in claim 1, wherein the clamping cage comprises on its end face that faces 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.
4. The electrical cable shield contacting device as claimed in claim 3, wherein the clamping sleeve comprises in a middle region outside a circumferential annular step and/or a circumferential annular collar against which the end profiling of the clamping cage is in contact.
5. The electrical cable shield contacting device as claimed in claim 4, wherein the end profiling protrudes in the radial direction beyond the annular step or the annular collar.
6. The electrical cable shield contact device as claimed in claim 1, wherein, 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.
7. An electrical plug connector having 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 having an electrical cable shield contacting device for contacting a shielding braid of an electrical shielded sheathed cable, wherein the electrical cable shield contacting device is as claimed in claim 1.
8. The electrical plug connector as claimed in claim 7 wherein 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 and the clamping cage having the end profiling lies against a counter profiling of the housing in a non-rotatable manner in the circumferential direction.
9. The electrical plug connector as claimed in claim 7, wherein 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 may be screwed onto the housing.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) The invention is further explained below with reference to exemplary embodiment illustrated in the accompanying drawing. In a schematic view:
(2) FIG. 1 illustrates in a longitudinal sectional view an electrical plug connector in accordance with the invention having an electrical cable shield contacting device in accordance with the invention for contacting a shielding braid of an electrical shielded sheathed cable that comprises a clamping sleeve and a clamping cage;
(3) FIG. 2 illustrates in a longitudinal sectional view the cable shield contacting device in accordance with the invention according to FIG. 1, disassembled into the clamping sleeve and the clamping cage;
(4) FIG. 3 illustrates in a longitudinal sectional view the cable shield contacting device in accordance with the invention according to FIG. 2, with the electrically shielded sheath cable prior to assembling the clamping sleeve and the clamping bracket; and
(5) FIG. 4 illustrates in a longitudinal sectional view the cable shield contacting device in accordance with the invention according to FIG. 3, with the electrically shielded sheathed cable after assembling the clamping sleeve and the clamping cage.
DETAILED DESCRIPTION OF THE INVENTION
(6) FIG. 1 illustrates an exemplary embodiment of the electrical plug connector 1 in accordance with the invention, having a housing 4 that has an at least in part cylindrical inner (2) and outer (3) circumference, a contact carrier 5 that is arranged in the housing 4, and an end cap 6 that may be screwed onto the housing 4 and having an electrical cable shield contacting device for contacting a shielding braid 8 of an electrical shielded sheathed cable 9. The sheathed cable 9 with its shielding braid is not illustrated in FIG. 1 for the sake of a better overview. Said sheathed cable is illustrated in the following FIGS. 3 and 4. The end cap 6 engages the housing 4 on a rear end 10 of the housing 4, said rear end being remote from the contact carrier 5 and the electrical cable shield contacting device 7 that comprises a clamping sleeve 11 and a clamping cage 12 being arranged in said housing. A rotating locking sleeve 14 is arranged on a front end 13 of the housing 4, said end extending with an axial spacing to the rear end 10 of the housing 4, said rotating locking sleeve being fixed in a rotatable manner on the front end 13 in which the contact carrier 5 is arranged in an unshiftable and non-rotatable manner. By means of the rotating locking sleeve 14, the electrical plug connector 1 may be fixed in a vibration-resistant manner on a counter plug that is not illustrated in the figure, the plug-in end of said counter plug being designed in a complementary manner to that of the plug connector 1. The rotating locking sleeve 14 is attached in a known manner to the front end 13 of the housing 4 and comprises a sealing ring 15 with respect to the housing 4 as a vibration brake. The contact carrier 5 comprises in this case a number of plug contacts 33.
(7) 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 FIG. 4, said clamping sleeve and said clamping cage are able to clamp the shielding braid 8 between each other at a clamping site 16. The clamping sleeve 11 comprises at the front inside in addition a cylindrically shaped receiving chamber 17 for the contact carrier 5 and supports said contact carrier in the axial direction. The clamping cage 12 comprises at the front inside a receiving chamber 34 for the clamping sleeve 11 and at the rear inside a cylindrical stowage space 22 for the shielding braid 8. An O-ring 18 that seals the clamping cage 12 with respect to the housing 4 is arranged in the region of the stowage space 22 outside on the clamping cage 12. In the region of the end cap 6, the clamping cage 12 comprises inside a cable sealing ring 19 with which the sheathed cable 9 may be sealed with respect to the clamping cage 12 by means of the screwed-on end cap 6.
(8) FIG. 2 illustrates in a disassembled state the cable shield contacting device 7 in accordance with the invention shown in FIG. 1. The clamping sleeve 11 and the clamping cage 12 are not engaging one another in the figure. The two individual parts 11, 12 of the cable shield contacting device 7 are illustrated in the longitudinal sectional view. The electrical cable shield contacting device 7 is provided for the above described electrical plug connector 1 for contacting a shielding braid 8 of the electrical shielded sheathed cable 9, wherein the plug connector 1 comprises a housing 4 that has an at least in part cylindrical inner (2) and outer (3) circumference, having a contact carrier 5 that is arranged in the housing 4, and an end cap 6 that may be screwed onto the housing.
(9) 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 FIGS. 1 and 4, at least in part one engaging over the other and that clamp the shielding braid 8 between one another at a clamping site 16 that is apparent in FIG. 4. The clamping sleeve 11 and the clamping cage 12 comprise sheath surfaces 21, 21′ that in the assembled state are spaced away from one another in an overlapping region 20, said sheath surfaces forming in a radially delimiting manner a circumferential annular duct-shaped stowage space 22 for receiving a length region 23 that is part of the shielding braid 8 and overlaps the clamping sleeve 11 and the clamping cage 12 in the axial direction. The sheath surface 21 may be an outer sheath surface of the clamping sleeve 11 and the sheath surface 21′ may be an inner sheath surface of the clamping cage 12.
(10) 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 FIGS. 1 and 4. The shielding braid entraining elements 25 are part of the coiling device 24. On a front sleeve end 26 that may be engaged or is engaged by the clamping cage 12, the sheath surface 21 of the clamping sleeve 11 comprises multiple circumferential annular grooves 27, into which the shielding braid entraining elements 25 engage, and latch the clamping cage 12 with the clamping sleeve 11. The shielding braid entraining elements 25 are designed in the shape of a pyramid with an entraining tip.
(11) 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 FIGS. 1 and 4 illustrate, the end profiling 29 or the profiled annular ring 29′ protrude beyond the annular step or rather the annular collar 32 in the radial direction. The overhang that results from this supports the clamping cage 12 in the axial, radial and/or circumferential direction in the housing 4 against an allocated counter bearing that is provided inside and illustrated in FIG. 1. It is consequently arranged in a positionally-stable manner in the housing 4.
(12) FIGS. 3 and 4 illustrate the procedure of assembling the electrical cable shield contacting device 7 on the electrical shielded sheathed cable 9. The assembly procedure is performed prior to inserting the cable shield contacting device 7 into the housing 4 and in fact in two steps. FIG. 3 illustrates the first step, FIG. 4 illustrates the second step. After the second step, the length region 23 that is part of the shielded braid 8 and overlaps the clamping sleeve 11 and/or the clamping cage 12 in the axial direction may be coiled in the form of a spiral by means of the coiling device 24 into the circumferential annular duct-shaped stowage space 22 of the cable shield contacting device 7, wherein the shielding braid 8 is possibly simultaneously automatically debraided in part or not at all by way of the shielding braid entraining elements 25.
(13) According to FIG. 3, during the procedure of assembling the electrical cable shield contacting device 7, a long region is initially stripped from the sheathed cable 9 at the front end that is to be connected to the plug connector 1 with the result that the shielding braid 8 is exposed. Thereafter, the stripped end is pushed through the cable sealing ring 19 into the clamping cage 12. In this case, the clamping sleeve 11 is still separate from the clamping cage 12. Subsequently, the length region 23 that is part of the shielding braid 8 and overlaps the clamping cage 12 in the axial direction is somewhat spread out in the radial direction and the clamping sleeve 11 is pushed in the axial direction under the shielding braid 8. In so doing, the length region 23 that is part of the shielding braid 8 and overlaps the clamping cage 12 in the axial direction, as FIG. 3 illustrates, lies against the outer sheath surface 21 of the clamping sleeve 11 and extends to a great extent in the axial direction of the cable shield contacting device 7.
(14) According to FIG. 4, thereafter the clamping sleeve 11 is inserted into the hollow cylindrical clamping cage 12, wherein the length region 23 that is part of the shielding braid 8 and overlaps the clamping cage 12 in the axial direction, comes to lie between the inner sheath surface 21′ of the clamping cage 12 and the outer sheath surface 21 of the clamping sleeve 11. In so doing, the shielding braid entraining elements 25 of the clamping cage 12 penetrate the shielded braid 8 in the overlapping region 20 and latch into the circumferential annular grooves 27 of the engaging sleeve end 26 of the clamping sleeve 11, with the result that the clamping sleeve 11 and the clamping cage 12 are latched with one another. In so doing, the circumferential annular duct-shaped stowage space 22 is simultaneously formed into which the length region 23 that is part of the shielding braid 8 and overlaps the clamping sleeve 11 and/or the clamping cage 12 in the axial direction may be coiled in the form of a spiral by means of the coiling device 24. As the clamping sleeve 11 is inserted into the clamping cage 12, the length region 23 that is part of the shielding braid 8 is placed around the cable shield contacting device 7 initially in the radial direction and thereafter in the axial direction. In so doing, the shielding braid 8 extends along the circumferential end profiling 29 or the closed profiled annular ring 29′, wherein the length region 23 that is part of the shielding braid 8 penetrates the depressions 30 of the end profiling 29.
(15) 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 FIG. 1 into the plug connector 1 from the rear in its housing 4 and may be fixed therein by means of the end cap 6. The clamping site 16 of the shielding braid 8 is situated at the front sleeve end 26 of the clamping sleeve 11, said front end being engaged by the clamping cage 12.
