EP1180823A2 - Cable-connection or cable-joint device - Google Patents

Abstract

The cable termination or connection device has a plug part incorporating contact elements, combined with a cable reception part, with a guide part provided with guide channels (10) for each of the cable conductors sandwiched between them and providing alignment of each of the cable conductors with the corresponding contact element. The guide part has a section (11) of a soft material, provided with the guide channels and a section (12) of a hard material, provided with positioning aid (13) for alignment of the cable conductors and the contact elements. An Independent claim for a guide part for a cable termination or connection device is also included.

Description

The invention relates to a cable connection or connection device for the frontal connection of the conductors of a preferably multi-core cable, with a plug-in part provided with contact elements, with a wire and -guiding part and with a cable holder, the wire holder- and guide part has wire guide channels and wherein Plug-in part and the cable receptacle can be connected to one another, in particular screwed are and in the assembled state the and guide part arranged between the plug part and the cable receptacle or is enclosed by the plug-in part and the cable holder.

a) Der Begriff "Kabel" steht für eine elektrische Leitung, die mindestens eine Ader, in der Regel aber mehrere Adern aufweist; sind mehrere Adern vorhanden, so wird von einem mehradrigen Kabel gesprochen. Bei nur einer Ader wird von einem einadrigen Kabel gesprochen.

b) Die Adern eines Kabels bestehen aus einem Leiter und einer Aderisolation.

c) In einem Kabel sind die für sich isolierten Leiter, also die mit jeweils einer Aderisolation versehenen Leiter, in ihrer Gesamtheit von einer weiteren Isolation umgeben, der Kabelisolation. Bei einem einadrigen Kabel ist neben der Aderisolation keine weitere Isolation vorgesehen.

First of all, it will be explained in the following which of the terms used in the following description first of all of the prior art, then of the invention, which meaning should or should have:

a) The term "cable" stands for an electrical line that has at least one wire, but usually has multiple wires; if there are several wires, it is called a multi-core cable. If there is only one core, this is referred to as a single-core cable.

b) The wires of a cable consist of a conductor and a wire insulation.

c) In a cable, the conductors which are insulated per se, that is to say the conductors each provided with a core insulation, are surrounded in their entirety by further insulation, the cable insulation. In the case of a single-core cable, no further insulation is provided in addition to the core insulation.

It is stated in the introduction that the invention is a cable connection or connection device for the frontal connection of the conductors of a multi-core Cable concerns. The cable can be connected to an electrical device or electrically connected with a second cable. When it comes to connecting a cable to an electrical device, so there is a connection device. Shall two cables be connected together are, it is a connection device. Independently of whether a connection or a connection is made always a connection of the cable or the conductor by a contact element instead of. In the following, a connection device is predominantly used. Nevertheless, there is always a connection device in the meaning previously explained.

In a connection device for electrically conductive connection of a Cable to an electrical device is to be understood in general terms as electrical device; in particular, the term "electrical device" should also include electrical and electronic components, devices and devices fall.

It has been said at the outset that the cable connection or connection device for connecting the conductors of a multi-core cable at the front is provided. First of all, it is common in practice that multi-core cables can be connected, basically the cable connection or connection device however, can also be used for such cables that have only one wire.

With the cable connection or connection device described above As a rule, cables are connected where the cable insulation, but not the wire insulation of the individual wires before connection have been removed. The cable connection or connection device thus enables the connection of non-stripped conductors. Ways of connecting non-stripped conductors are already out of the State of the art known. For this purpose, so-called Insulation displacement clamps or insulation displacement connection devices used, in which the contact elements usually designed as contact blades Cut into the wire insulation from the outside until there is contact with the leader. There is also a second option the connection of non-stripped conductors, where the usually Contact elements designed as contact spikes do not protect the wire insulation cut, but from the front of the vein in the direction of Penetrate the longitudinal axis of the wire into the conductor and / or the wire insulation and contact with the leader.

In the cable connection or to be created with the present invention -connection device is now used from the second option made, d. H. the wire insulation is not cut from the side, but the conductors are connected from the front. Thereby in usually used in such a connection stranded conductor which thus the contact element between the individual strands of the conductor penetrates. Due to the restoring force of the wire insulation, there is a electrical contact sufficient clamping force between the individual Strands of the conductor and the contact element penetrated into the conductor.

From the German patent 44 18 259 is a cable connection or connection device of the type in question, in which the and guide part from a plug-side connector and a cable-side End part exists. In the assembled state of the cable connection or -connection device, the nozzle is in a corresponding recess inserted in the plug-in part. The alignment of the individual wires too the contact elements now takes place in that in the wire receiving and -guide part provided four axially parallel channels for receiving the cores are in alignment with the contact elements when assembled. It is the inside diameter of the channels is slightly smaller than the outside diameter of the wires, whereby on the one hand the wires are clamped to others by appropriate alignment of the nozzle to the contact elements the wires are also aligned with the contact elements. In addition, the cable end part of the wire receiving and guiding part resiliently formed by longitudinal slots arranged in the end part, thereby acting on the end part in a correspondingly radial manner Forces a clamping of the individual wires can be achieved.

In the known, previously described cable connection or connection device is an exact alignment of the individual wires to the contact elements depending on the manufacturing tolerances of the nozzle of the Wire receiving and guiding part to the corresponding recess of the plug-in part. They are also for different cables with different Diameter of the cores different cores and guide parts required. Assigns a used wire with smaller wires Diameters than the wire guide channels, there is only one inadequate alignment of the wires to the contact elements.

From the German utility model 298 17 679 a cable connection is also known or connecting device of the type in question, which, however, involves connecting different cables with different ones Conductor cross-sections enabled. For this, the core and guide part made of a rubber-elastic material with arranged therein axially parallel channels formed. By pressing the rubber-elastic material in the radial direction is adjusted Channel cross-section at the actual cross-section of the inserted wires. The disadvantage here, however, is that the compression of the not only rubber-elastic material of the wire receiving and guiding part the channel cross section but also the alignment of the channel center to the Contact elements changed. Thus, the introduction of wires with different is Diameter in the wire guide channels of the and guide part possible, the accuracy of the orientation of the inserted Veins to the contact elements also depend on the used wire cross-sections from, so that an exact alignment is not can always be guaranteed. In addition, the orientation of the Veins due to aging and subsidence of the rubber-elastic Core receiving and guiding part negatively affected.

The present invention is therefore based on the object of a cable connection or connecting device for the frontal connection of conductors to provide a multi-core cable, where possible one exact alignment of the individual wires to the contact elements of the Plug part is realized. In addition - within certain limits - Different cables with different wire cross sections with the same cable connection or connection device can be connected can.

The task derived and shown above is first and foremost solved in that the wire receiving and guiding part from one first section made of soft material and a second section hard material and that in the first section the wire guide channels and in the second section a positioning aid for exact Alignment of the conductors to the contact elements are formed; "soft Material "means one that is relatively elastic," hard material "means one one that is not very elastic.

Due to the inventive design of the wire receptacle and -The first part is the connection of different cables different wire cross-sections possible. By arranging the Core guide channels in the first, made of soft material, in particular a soft plastic, for example a thermoplastic elastomer existing section of the wire receiving and guiding part can through radial pressure on this first section of the cross section of the wire guide channels can be reduced to the smaller cross-section of the wires. Here, due to the elastic properties of the first section Adequate clamping of the individual wires in the wire guide channels be achieved so that the veins slide back when penetrating the contact elements in the veins is prevented. Due to the radial pressure the first section also ensures that the electrical Contact between the individual strands of a conductor and that of the The end of the contact element inserted into the conductor is necessary Contact force is ensured. The force acting radially on the wire insulation thus additionally supports the restoring force of the wire insulation. Thereby, that the alignment of the wires or the conductor to the contact elements by one in the second section of the wire receiving and guiding part trained positioning aid is realized, the exact alignment the conductor to the contact elements not by squeezing the Wire guide channels affected. The fact that the second section from a hard plastic, in particular from a hard thermoplastic or from a ceramic material or other hard insulating material the positioning aid is much less sensitive to Signs of aging and settlement.

For example, as a thermoplastic elastomer for the first section a natural rubber or a silicone rubber can be used, wherein the first section can be made by vulcanization.

According to a particularly preferred embodiment of the invention, the first Section made of thermoplastic elastomer and the second section One-piece thermoplastic. The wire intake and guide part to be produced in the two-component injection molding process, so that the two sections are materially connected to each other. The Advantage of such a wire receptacle designed as a composite injection molded part and guiding part is that it ensures in a simple manner is that there is no shifting or twisting of the first Section and the second section can come together.

According to a preferred embodiment of the positioning aid, it has holes assigned to the individual wire guide channels, the Holes, seen from the wire guide channels, a tapered Have cross-section. The holes can in particular be funnel-shaped or conical. With such a configuration the positioning aid is done by simply inserting the Cores through the wire guide channels into the tapered holes a "self-alignment" of the inserted veins. Through the funnel or cone-shaped formation of the holes is always an exact constant alignment of the core axis, regardless of the Vein diameter. So the contact elements of the plug-in part arranged so that they are centered on the holes of the positioning aid are, it is always ensured that the contact elements meet in the middle of the front of the wires to be connected.

The arrangement and alignment of the contact elements exactly in the middle of the Bores of the positioning aid can now be particularly advantageous can be easily realized that the holes are a first to which Tapered area, a second Area of constant diameter and a third, expanding Have range. The positioning aid is not only used for alignment the wires but also to align the contact elements, with an exact alignment of the wires to the contact elements is realized in that the hole as a whole and thus all three areas have a matching center line.

It has previously been stated that the holes have a first tapered Area, a second area of constant diameter and one third, expanding area. The first and the third area to be mirror-symmetrical to each other and even to each other adjoin so that the middle second area is virtually eliminated or only has a vanishing length. The minimum diameter of the first, the tapered area must always be smaller than the smallest diameter a wire to be connected, so that the first area of the hole always a stop for one inserted through a wire guide channel Vein forms. In contrast, the smallest diameter of the third Range should always be larger than the diameter of the contact elements, so that the contact elements through the holes through to the area of the wire guide channels protrude. Ideally, the smallest diameter corresponds the third area exactly the outer diameter of the contact elements.

In the cable connection or connection device according to the invention essential to the invention is the embodiment previously described in detail of the wire receiving and guiding part. Subject of the present invention is not just a cable connection or connection device, but also a wire receiving and guiding part for use in one Cable connection or connection device. For the specific design the cable connection or connection device, in particular the Plug-in part and the cable holder, there are different options. The only essential function is that the plug-in part and / or the cable receptacle are designed so that on the one hand the plug-in part and the cable holder are connectable to each other, that radial forces in particular at first, made of a soft, elastic material Section of the wire receiving and guiding part are exercised.

According to an advantageous embodiment of the cable connection according to the invention or connecting device is a between the plug and the Cable receiving effective coding element is provided. For example, this indicates the second section has a groove and the plug-in part has an associated one Spring on. Of course, the groove can also be the plug-in part and the tongue be assigned to the second section or the coding element can another way. With such a coding element, a reverse polarity protected connection of a cable to the contact elements of the plug-in part ensured.

According to an advantageous embodiment of the cable connection according to the invention or connecting device, the cable receptacle has a sleeve with an external thread and the plug-in part a union nut with a the internal thread corresponding to the external thread of the sleeve. Consequently can to assemble the cable connection or connecting device, the cable receptacle and the plug-in part simply screwed together be, between the cable holder and the Plug-in part of the wire receiving and guiding part is arranged.

The radial force on the wire receiving and guiding part can thereby can be easily realized that the plug-in part within the union nut arranged sleeve part, the sleeve part in the assembled state Enclosure and guide part encloses and the inner diameter of the Sleeve part at least partially smaller than the outer diameter of the Wire receiving and guiding part is. By arranging such Sleeve part in the plug-in part can thus on the first section of the wire a radial force are exerted, whereby the wire guide channels compressed and in the wire guide channels inserted wires are clamped. A particularly beneficial one Clamping the wires in the wire guide channels near the positioning aid is achieved in that the inner diameter of the sleeve part extended towards the wire receiving and guiding part, with in other words, the sleeve part on the side facing away from the cable receptacle has the smallest diameter.

Fig. 1

eine perspektivische Ansicht einer erfindungsgemäßen Kabelanschluß- oder -verbindungseinrichtung in geöffnetem Zustand,

Fig. 2

eine der Fig. 1 entsprechende Ansicht der Kabelanschluß- oder -verbindungseinrichtung im Kontaktierungszustand,

Fig. 3

eine Prinzipskizze eines Adernaufnahme- und -führungsteils einer erfindungsgemäßen Kabelanschluß- und -verbindungseinrichtung im Schnitt und

Fig. 4

ein Adernaufnahme- und -führungsteil einer erfindungsgemäßen Kabelanschluß- und -verbindungseinrichtung mit eingeschobenen und durch die Kontaktelemente kontaktierten Adern.

In particular, there are now a multitude of possibilities for designing and developing the previously described inventive cable connection or connection device. For this purpose, reference is made on the one hand to the claims subordinate to claim 1, and on the other hand to the following description of a preferred exemplary embodiment in conjunction with the drawing. Show in the drawing

Fig. 1

a perspective view of a cable connection or connection device according to the invention in the open state,

Fig. 2

1 corresponding view of the cable connection or connection device in the contacting state,

Fig. 3

a schematic diagram of a wire receiving and guiding part of a cable connection and connection device according to the invention in section and

Fig. 4

a wire receiving and guiding part of a cable connection and connection device according to the invention with inserted and contacted by the contact elements.

1 and 2 show an embodiment of an inventive Cable connection or connection device 1 for frontal connection the - shown in Fig. 3 and 4 - conductor 2 of a multi-core cable 3, which has a total of five wires 4. The cable connection according to the invention or connection device 1 enables the connection of non-stripped conductors 2 in that contact elements 5 from the end face of the conductor 2 forth approximately in the direction of the longitudinal axis of the conductor 2 in the Penetrate conductor 2. As a rule, stranded conductors 2 are used, in which the contact element 5 between the individual Strands of the conductor 2 penetrates. Because of the restoring force of the individual Conductor 2 surrounding wire insulation 6 is one for electrical Contacting sufficient clamping force between the individual strands of the Conductor 2 and the contact element 5 that has penetrated into the conductor 2.

The cable connection or connection device 1 consists essentially from a plug-in part 7, in which the contact elements 5 are arranged, one Wire receptacle and guide part 8 and a cable receptacle 9. For connection a cable 3 to the cable connection or connection device 1 the individual wires 4 are inserted into wire guide channels 10, which are provided in the wire receiving and guiding part 8. At the in 1 and 2 illustrated embodiment are a total of five to each other parallel wire guide channels 10 in the wire receiving and guiding part 8 provided so that the cable connection or connection device shown there 1 for the electrical connection of cables 3 with a maximum five wires 4 is provided. According to the five existing wire guide channels 10, five contact elements 5 are also arranged in the plug-in part 7.

3 and 4 show a schematic diagram of the wire receiving and Guide part 8, which according to the invention from a first section 11 a soft material, in particular made of thermoplastic elastomer, and a second section 12 made of a hard material, in particular of a hard thermoplastic or ceramic. In the first section 11, the wire guide channels 10 are provided, while the second section 12 of the wire receiving and guiding part 8 a positioning aid 13 forms for exact alignment of the conductor 2 to the contact elements 5. The wire receiving and guiding part 8 is preferably in the two-component injection molding process manufactured so that the wire intake and guide part 8 is in one piece and the first section 11 with the second section 12 is materially connected.

In Fig. 3 it can be seen that the diameter of the wire guide channels 10th is larger than the diameter of the wires 4 to be connected Diameter of the wire guide channels 10 selected so that it is the largest Diameter of the for connection to the cable connection or connection device 1 provided cores 4 corresponds. The fact that the wire guide channels 10 in the first section made of soft material 11 of the wire receiving and guiding part 8 are provided Core guide channels 10 by exerting a radial force on the first Section 11 of the wire receiving and guiding part 8 so far compressed be that sufficient axial fixation of the individual Cores 4 in the wire guide channels 10 is reached.

The positioning aid 13 of the wire receiving and guiding part 8 has the wire guide channels 10 associated holes 14, the Bores 14 from a first, adjoining the wire guide channels 10, tapered area 15, a second area 16 constant Cross section and a third, widening area 17 exist. The first, tapering funnel-shaped area 15 of the bore 14 is used for exact positioning of one pushed through the wire guide channel 10 Core 4. Because the first region 15 of the bore 16 tapered in a funnel shape, there is always a "self-alignment" of the inserted Cores 4 and thus also the conductor 2 to be contacted, so that the Center line of an inserted conductor 2 always with the center line of the hole 14 matches.

3, the wire receiving and guiding part 8 with inserted Veins 4, but without contact elements 5 shows, are in Fig. 4 also from the opposite direction inserted contact elements 5 shown. Just as the areas 15 of the holes 14 an exact alignment of the Cause cores 4, so cause the conical regions 17 of the holes 14 an exact alignment of the contact elements 5. Corresponds to the Outside diameter of the contact elements 5 the smallest diameter of the Hole 14, d. H. the diameter of the central region 16, so it arrives through the bore 14 of the positioning aid 13 inserted contact element 5 always exactly in the middle of an inserted in a wire guide channel 10 Core 4 and therefore always in the center of the core insulation 6 surrounded conductor 2. By the previously described in detail Design of the positioning aid 13 and the material connection of the first section 11 having the wire guide channels 10 and the second section 12 of the positioning aid 13 Core receiving and guiding part 8 ensures that the contact elements 5 always hit the front of the conductor 2 in the center, this is then also an optimal electrical contact between the conductors 2 and Contact elements 5 ensured.

A preferred way of assembling the invention Cable connection or connection device 1 is shown in FIGS. 1 and 2. In the illustrated embodiment, the cable holder 9 and the plug-in part 7 are screwed together so that the cable holder 9 a sleeve 18 with an external thread 19 and the plug-in part 7 a union nut 20 with a corresponding to the external thread 19 of the sleeve 18 Has internal thread 21. When assembled, the Cable connection or connection device 1 is then the wire receiving and guide part 8 enclosed by the sleeve 18 and the union nut 20.

The plug part 7 has an inner sleeve 22 and the contact elements 5 receiving contact carrier 23. The inner sleeve 22, which in the contacting state surrounds the wire receiving and guiding part 8 in a form-fitting manner, has an inside diameter that is at least partially smaller than the outer diameter of the receiving and guiding part 8. The inner contour the inner sleeve 22 is now selected so that in the assembled state Cable connecting or connecting device 1 the first section 11 of the Core receiving and guiding part 8 compressed by the inner sleeve 22 is, so that 10 inserted in the wire guide channels 10 4th be clamped. In the embodiment shown in FIGS. 1 and 2 the cable connection or connection device according to the invention 1, the cable receptacle 9 also has a clamping cage 24, which acts as a strain relief for the inserted cable 3.

In addition to the realization shown in FIGS. 1 and 2, in particular the Plug part 7 and the cable receptacle 9, in which the sleeve 18 of the cable receptacle 9 and the union nut 20 are assigned to the plug-in part 7 such a design is also possible in which the union nut of the cable holder is assigned and the plug-in part is a sleeve with an external thread having. A radial force can also be exerted on the and -guiding part exercising sleeve part instead of in the plug-in part in the cable receptacle be arranged.

Claims (14)

Cable connection or connection device for the frontal connection of the conductors (2) of a preferably multi-core cable (3), with a plug part (7) provided with contact elements (5), with a wire receiving and guiding part (8) and with a cable receptacle (9 ), the wire receiving and guiding part (8) having wire guiding channels (10) and wherein the plug-in part (7) and the cable receptacle (9) can be connected to one another, in particular screwed, and in the assembled state the wire receiving and guiding part (8) between the plug-in part (7) and the cable receptacle (9) is arranged or is enclosed by the plug-in part (7) and the cable receptacle (9), characterized in that the wire receiving and guiding part (8) consists of a first section (11) soft material and a second section (12) consists of hard material and that in the first section (11) the wire guide channels (10) and in the second section (12) a positioning aid (13) for exact A direction of the conductor (2) to the contact elements (5) are formed. Cable connection or connection device according to claim 1, characterized in that the first section (11) made of a soft plastic, in particular a thermoplastic elastomer, and the second section (12) made of a hard plastic, in particular a hard thermoplastic, or a ceramic material. Cable connection or connection device according to claim 1 or 2, characterized in that the first section (11) and the second section (12) are made in one piece, in particular are materially connected to one another. Cable connection or connection device according to one of claims 1 to 3, characterized in that the diameter of the individual wire guide channels (10) corresponds to the largest diameter of the wires (4) to be connected. Cable connection or connection device according to one of Claims 1 to 4, characterized in that the positioning aid (13) has bores (14) assigned to the individual wire guide channels (10) of the wire receiving and guiding part (8) and the bores (14), seen from the wire guide channels (10), have a tapering cross-section. Cable connection or connection device according to claim 5, characterized in that the bores (14) of the positioning aid (13) are funnel-shaped or conical. Cable connection or connection device according to claim 5 or 6, characterized in that the bores (14) of the positioning aid (13) form a stop for the wires (4) inserted through the wire guide channels (10) of the wire receiving and guiding part (8) , Cable connection or connection device according to one of Claims 5 to 7, characterized in that the bores (14) of the positioning aid (13) have a tapering region which adjoins the wire guide channels (10) of the wire receiving and guiding part (8) (15), a second region (16) of constant cross section and a third, widening region (17). Cable connection or connection device according to one of claims 1 to 8, characterized in that a coding element is provided between the plug-in part (7) and the cable receptacle (9), for example the second section (12) has a groove and the plug-in part (7) has an associated spring. Cable connection or connection device according to one of claims 1 to 9, characterized in that the cable receptacle (9) has a sleeve (18) with an external thread (19) and the plug-in part (7) has a union nut (20) with an external thread ( 19) is assigned to the sleeve (18) corresponding internal thread (21). Cable connection or connection device according to claim 10, characterized in that the plug-in part (7) has an inner sleeve (22) arranged within the union nut (20), the inner sleeve (22) encloses the wire receiving and guiding part (8) in the assembled state and the inner diameter of the inner sleeve (22) is at least partially smaller than the outer diameter of the wire receiving and guiding part (8). Cable connection or connection device according to claim 11, characterized in that the inner diameter of the inner sleeve (22) widens in the direction of the wire receiving and guiding part (8). Cable connection or connection device according to one of claims 1 to 12, characterized in that the plug-in part (7) has a contact carrier (23) with bores for receiving the contact elements (5) and the contact elements (5) on their the wire receiving and Guide part (8) facing end have contact skewers. Wire receiving and guiding part with wire guide channels (10) for Use in a cable connection or connection device for front connection of the conductors (2) of a preferably multi-core cable (3), with a plug-in part (7) provided with contact elements (5), according to one of claims 1 to 13, consisting of a first section (11) a soft material, in particular thermoplastic elastomer, and a second section (12) made of a hard material, in particular a hard thermoplastic or a ceramic material, being in the first section (11) the wire guide channels (10) and in the second section (12) one Positioning aid (13) for exact alignment of the ladder (2) to the Contact elements (5) are formed.

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