Device for receiving a cable

Abstract

Device (1) for receiving a cable (2) and for electrically contacting an at least partially exposed shield (3) of the cable (2) with a carrier (18), comprising a shield clamp (7) and a locking foot (9) which includes two legs (10, 11) and a base (12) connecting them, wherein the locking foot (9) can be snapped onto the carrier (18) such that the two legs (10, 11) and the base (12) at least partially enclose the carrier (18) on three sides, wherein the locking foot (9) is connected to the shield clamp (7) at one of its legs (10), wherein this leg (10) has at least one section (15) bent towards the carrier (18) on each of its side edges transversely to the insertion direction, wherein the bent sections (15) rest on the carrier (18) when the locking foot (9) is inserted, characterized in that the shield clamp (7) and the locking foot (9) are connected to each other by screwing or riveting,wherein the two legs (10, 11) are opposite each other, and wherein the leg (11) opposite the leg (10) connected to the shield clamp (7) has a hole (25) or a recess (26).

Description

[0001] The invention relates to a device for receiving a cable and for electrically contacting an at least partially exposed shield of the cable with a conductive carrier according to the type defined in more detail in the preamble of claim 1.

[0002] Such devices, which typically include at least one so-called shield clamp, are known from the prior art. The shield clamp holds the braided shield of a cable, which has been stripped of its outer insulation in the area of ​​the clamp. The clamp thus holds the cable and makes contact with its braided shield. The clamp itself is electrically conductive and is conductively connected to a base, which in turn is mounted on a support such as a busbar or similar, which is grounded and therefore provides shielding.

[0003] A very good conductive and space-saving connection between the base and the shield clamp can be achieved, for example, by soldering, as is known from the prior art. However, this has the disadvantage of being extremely complex to manufacture.

[0004] In practice, screwing or, in particular, riveting has proven to be a reliable, sufficiently electrically conductive, and cost-effective connection. In this context, reference can be made to a generic device of the applicant, which is described in EP 1 837 571 A2. The design shown there, which is also typical for other designs on the market, positions the shield clamp in the direction of cable travel, either in front of or behind the base or locking base. This creates sufficient space for the connection by riveting. The disadvantage, however, is a very large space requirement in the direction of cable travel and a loss of stability due to the unavoidable lever arm between the shield clamp and the locking base.

[0005] A space-saving solution is the one described in DE 10 2010 036 003 B4, in which the locking foot is clipped to the shield clamp. However, this design relies on a special shield clamp designed specifically for this purpose, making it very complex to manufacture. Furthermore, clipping the locking foot and shield clamp together results in a somewhat less stable connection than, for example, riveting. This can be a disadvantage in applications where vibrations may occur, such as in the construction of rail vehicles.

[0006] The object of the present invention is therefore to provide an improved device according to the preamble of claim 1, which can be designed to be simple, cost-effective, stable and space-saving, and which can also be used in applications susceptible to vibrations.

[0007] According to the invention, this problem is solved by a device having the features of claim 1, and in particular those of the characterizing part of claim 1. Advantageous embodiments and further developments are described in the dependent claims.

[0008] The device comprises a locking base and a shield clamp, as in the generic device. According to the invention, the essentially U-shaped locking base has at least two lateral bends on its leg connected to the shield clamp. These bends extend in the insertion direction or in the direction of travel of the cable to be accommodated and bear against the support when locked in place. A gap is thus created between the lateral bends and the support and the leg at the top and bottom, the height of which is determined by the dimension of the bends. This gap can then accommodate part of a rivet or a screw. The shield clamp can therefore be screwed or, more preferably, riveted to the locking base. This allows for a simple, secure, stable, and cost-effective connection.Conventional shield clamps can be used, which offers a further cost advantage due to the higher production volumes of these components. The support can be designed as a rectangular busbar with typical predefined dimensions, or as a metal plate or similar.

[0009] According to a particularly advantageous embodiment, the device can include a strain relief tab for securing the cable with a cable tie. Such a strain relief tab, for example, with a tapered section to which the cable can be attached using a cable tie, serves to relieve strain on the cable. Such strain relief tabs, known per se, can also be used here as an addition to the device. They can be designed as a separate component and connected to the locking base and the shield clamp, preferably riveted between them. Alternatively, the strain relief tab can be formed as a single unit with the locking base or the shield clamp.

[0010] The possibility of a screw or rivet connection, which, according to an advantageous embodiment, is formed in a part of the leg that covers the support when locked in place, allows for a very compact and stable construction. Preferably, the total length of the locking foot in the direction of travel of the cable to be accommodated can be less than twice, and preferably less than 1.5 times, the width of the support if it is a typical busbar for which the locking foot is designed. Thus, apart from its possible strain relief tab, the construction protrudes very little beyond the busbar, particularly compared to the construction described in the aforementioned generic document.

[0011] Further advantageous embodiments and developments of the device according to the invention will become apparent from the remaining dependent subclaims and will be made clear by reference to the exemplary embodiment, which is described in more detail below with reference to the figures.

[0012] They show: Fig. 1 a three-dimensional view of the device according to the invention with cables in a first embodiment according to the invention, which is snapped onto a busbar as a support; Fig. 2 a three-dimensional view of the locking foot of the device according to Fig. 1; Fig. 3 a side view of the locking foot of the device according to Fig. 1; Fig. 4 a three-dimensional view of the device according to Fig. 1; Fig. 5 a three-dimensional view of the device according to Fig. 1 snapped onto the power rail; Fig. 6 a sectional view according to line VI-VI in Fig. 7; Fig. 7 a front view of the device according to Fig. 1 with cable attached and snapped onto a power rail; Fig. 8 a three-dimensional view of the device in an alternative embodiment with a strain relief tab; Fig. 9 a side view of the embodiment according to Fig. 8 with the cable; Fig. 10 a view analogous to Fig. 9 with a metal plate as a support; and Fig. 11 a three-dimensional view of the locking foot of the device according to Fig. 10.

[0013] In the presentation of the Fig. 1 is one possible embodiment of a device 1 to accommodate a cable 2 and for the electrical contacting of an at least partially exposed shield battle 3 of the cable 2 with a carrier18 , here a power rail 4 to recognize the busbar 4 It has a rectangular cross-section. It extends in one direction s of travel of the conductor rail. 4 In the presentation of the Fig. 1 is just a short section of the busbar 4 Illustrated by example. The cable 2 extends in a running direction k of the cable, which is essentially perpendicular to the running direction s of the busbar 4 is designed, and which also the mounting direction of the device 1 on the carrier 18 corresponds. The cable 2 is in a section of its outer isolation 5 freed, so that in this section the screen mesh 3 of the cable 2 is exposed. This is sandwiched between two elastic spring arms. 6 one related to the device 1 belonging shield clamp 7This secures it on the one hand and on the other hand connects it to the electrically conductive material of the shield clamp. 7 contacted.

[0014] The elastic spring arms 6 the shield clamp 7 are based 8 interconnected. This base 8 is itself equipped with a resting foot 9 connected, which is on the power rail 4 It can be snapped to a grid and displayed in the representation of the Fig. 1 is also. The one in the Fig. 2 and Fig. 3 locking feet shown in detail 9 It essentially consists of two legs. 10 , 11 which over a floor 12 are connected to each other. The two legs 10 , 11 come when the locking foot is in the engaged position 9 , as can be seen, for example, on Fig. As can be seen above and below the busbar, see 1 4 or the carrier 18to lie down. They then close together with the ground. 12 the power rail 4 from three sides. To enable snapping into place, the shield clamp later points 7 thighs turned away 11 a resting ledge 13 on which, for example, as an edge in the leg 11 is formed. At this resting projection 13 This then closes with a threading slope. 14 to.

[0015] The special feature of the design of the rest foot 9 lies in the area of ​​the other thigh 10 , which is later connected to the shield clamp 7 It is connected. This is perpendicular to the direction of travel s of the conductor rail at both of its side edges. 4 each with a section bent towards the power rail 15 provided. The two bends 15 , which also features a threading slant 16They may be equipped with them, are designed so that they lock onto the power rail in the locked position. 4 support.

[0016] Both the resting foot 9 as well as the shield clamp 7 They can be very easily formed from a single strip of sheet metal and produced by punching and bending.

[0017] As it is in Fig. As indicated in section 4, the resting foot thus formed can now be 9 and the shield clamp 7 to connect each other. This connection can preferably be made with a rivet. 17 or also a screw. The parts of the rivet 17 They then come above the base 8 the shield clamp 7 to lie where there is space anyway and below the thigh 10 of the resting foot 9 The one below the thigh 10 The required clearance is now provided by the bends. 15created. These are located in the locked-in state of the device. 1 on the power rail 4 , which in Fig. 5 is shown, on the power rail 4 This creates a gap between the bends. 15 laterally as well as the power rail 4 bottom and thigh 10 Above is the free space, the height of which depends on the dimension of the bends. 15 is determined. This free space can now be one part of the rivet. 17 record. Fig. 6 and Fig. 7, which are based on the representation in Fig. 1. Orient yourself, show this space for the rivet 17 below the thigh 10 and above the busbar 4 To reiterate. Regarding the rivet 17 or the screw when mounting the shield clamp 7 on the resting foot 9 Being able to fix it also requires a hole 25 for riveting or screwing into the leg 11planned and in the Fig. 2 and Fig. 4 partially recognizable.

[0018] This enables a very simple, cost-effective and reliable rivet connection, which is achieved through the space created for the rivet. 17 nevertheless, efficient locking and good positioning of the locking foot 9 on the power rail 4 This enables good and reliable shielding, even under difficult conditions such as vibrations.

[0019] The bends 15 or the free space created, the possibility of using the shield clamp 7 with the resting foot 9 to rivet them together so that these two parts lie on top of each other and, in the snapped-on state, the power rail 4 The overlapping design allows for a very stable and compact construction. The shield clamp 7 It is preferably located centrally above the power rail 4which makes the structure even more stable. A total length I of the locking foot. 9 in the direction of travel k of the cable to be recorded 2 is less than 1.5 times the width b of the busbar 4 in this direction. The construction is therefore also exceptionally compact, which was previously not possible with riveted connections.

[0020] The device can be used if required. 1 also with a strain relief tab 19 provided. The Fig. 8 and Fig. Figure 9 shows this embodiment in a three-dimensional view, essentially analogous to the one in Fig. 5 and once with the cable 2 in a side view. Fig. 8 is a tapered area. 20 the strain relief tab 19 to recognize. The cable will be in this area. 2 with a wrapping agent 21 , such as with a cable tie. This holds the cable 2on the outer insulation5, the so-called cable sheath, securely at the strain relief tab 19 . Unlike in the area of ​​the exposed umbrella weave 3 This allows tensile relief forces to be absorbed and transferred via the resting foot. 9 into the power rail 4 can be derived.

[0021] In the example of the Fig. 8 and Fig. 9 is the strain relief tab 19 between the resting foot 9 or its upper thigh 10 and the shield clamp 7 or their basis 8 It is positioned there and riveted in place. The strain relief tab 19 It then runs diagonally upwards, down to the level of the cable. 2 and then parallel to this along its outer insulation 5 Alternatively, instead of the example, it would also be possible to use the strain relief tab. 19 one-piece with the ratchet foot 9 or its upper thigh 10 or with the shield clamp7 to train.

[0022] In Fig. 10 is a side view similar to the one in Fig. 9 shown. As the carrier 18 However, there is a metal plate here. 22 instead of the busbar 4 shown. Also with / on such a metal plate 22 as carrier 18 The device can be used both as shown here with the strain relief tab. 19 as well as without these, thus analogous to the variants in the Fig. 1 to Fig. 7. The one for snapping onto the metal plate 22 , which in their extent in the direction of travel k of the cable 2 larger than the resting foot 9 is, used locking foot 9 can preferably be designed as described in the Fig. 10 and Fig. 11 is recognizable. He still has both thighs. 10 and 11 , as well as the typical chamfers 15to make room for the screw or rivet 17 to create the resting ledge 13 However, it now takes the form of two locking projections. 13 formed by bending the material of the lower leg 11 along two slots 23 can be achieved. The peaks that thus form on the resting projections 24 They clamp or claw together ideally thanks to the material of the metal plate 22 .

[0023] The threading slope 14 is here in two perpendicular directions k to the running direction of the cable. 2 The sections were spaced apart, since instead of the hole 25 for riveting or screwing, as with both variants according to the Fig. 1 to Fig. 9 is an exception here. 26 that is intended for this purpose. However, the hole would also be there here. 25 with a continuous threading slope 14 or in the variants according to the Fig. 1 to Fig.9 is the exception 26 instead of the hole 25 possible. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 1837571 A2

[0004] DE 102010036003 B4

[0005]

Claims

[1] Device (1) for receiving a cable (2) and for electrically contacting an at least partially exposed shielding network (3) of the cable (2) with a carrier (18), comprising a shield clamp (7) and a locking foot (9) which comprises two legs (10, 11) and a base (12) connecting them, wherein the locking foot (9) can be locked onto the carrier (18) in such a way that the two legs (10, 11) and the base (12) at least partially enclose the carrier (18) on three sides, wherein the shield clamp (7) and the locking foot (9) are connected to one another by screwing or riveting, characterized by that the locking foot (9) is connected to the shield terminal (7) at one of its legs (10), said leg (10) having at least one section (15) bent in the direction of the carrier (18) on both side edges transversely to the plug-on direction, the bent sections (15) resting on the carrier (18) when the locking foot (9) is plugged on. [2] Device (1) according to claim 1, characterized by that the connection between the locking foot (9) and the shield clamp (7) is formed in a part of the leg (10) which, in the locked state, covers the carrier (18). [3] Device (1) according to claim 1 or 2, characterized by that the two side edges of the leg (10) are bent over most of their length as the sections (15). [4] Device (1) according to at least one of the preceding claims, characterized by that the bevelled sections (15) have a threading slope (16) on their side facing away from the base (12). [5] Device (1) according to at least one of the preceding claims, characterized by that the leg (11) facing away from the shield clamp (7) has at least one locking projection (13) and at least one threading bevel (14). [6] Device (1) according to at least one of the preceding claims, characterized bythat the shield clamp (7) and the locking foot (9) are each made of a single piece of sheet metal. [7] Device (1) according to at least one of the preceding claims, characterized by that a strain relief tab (19) is provided for fastening the cable (2) with a wrapping means (21). [8] Device (1) according to claim 7, characterized by that the strain relief tab (19) is designed as a separate part and is connected to the locking foot (9) and the shield clamp (7) or is designed as a single piece with the locking foot (9) or the shield clamp (7). [9] Device (1) according to at least one of the preceding claims, characterized bythat when the support (18) is designed as a busbar (4), the total length (I) of the locking foot (9) in the running direction (k) of the cable (2) to be accommodated is less than 2 times, preferably less than 1.5 times, the width (b) of the busbar (4) for which the locking foot (9) is designed, in the same direction. [10] Device (1) according to one of claims 2 to 9, characterized by that when the support (18) is designed as a busbar (4), the connection is formed centrally above the busbar (4) in the latched state.

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