EP1133813B1 - Device for contacting an electric cable, especially a flat conductor cable - Google Patents

Description

The invention relates to a device for contacting a electrical line, in particular a ribbon cable with a contact element.

Such a device is for example in the range of so-called energy bus systems are required, in which one Ribbon cable with multiple cable cores a variety of Consumers, such as motors, etc. can be connected.

From DE 44 02 837 C2 is an electrical installation system known that by a ribbon cable and a connector is formed. The ribbon cable contains energy transmission cores arranged essentially in one plane and non-twisted data transmission cores. there should contact the energy and data transmission wires with the connection device without removing the cable jacket by piercing. For transmission lines, which have a common conductive shield, becomes Avoiding a short circuit via contact screws with a additional electrical insulation a contact enabled with the respective transmission wire.

US-A-3 816 818 describes a ribbon cable connection which contains two clamping bodies, which are shaped so that they have one side of a ribbon cable form-fitting be able to record. These two clamps - the ribbon cable surrounding pressed against each other - can against a contact holder can be pulled so that with the contact holder connected contact tines penetrate the cable insulation and can contact the inner conductor of the cable.

The invention has for its object a device to contact an electrical line specify the a simple way to safely contact the electrical Cable also allows for higher currents.

This object is achieved by a device with the in the claim 1 specified features solved.

The invention is based on the knowledge that for a safe Contacting is only a point contact is not sufficient. Such a connection is in the As a rule, it cannot be mechanically loaded sufficiently, nor can it ensure a frequently required high current carrying capacity. In contrast, the device according to the invention due to the spatially offset arrangement of the Contact tongues the contact element with the inner conductor of the line connected several times over a large area. The are on the Contact element molded contact tongues through the insulation the electrical line to be contacted in such a way that the single wires of the inner conductor on the one hand between the contact tongues are clamped and on the other hand additionally contact the outside of the reeds. This results in "double" contact areas, namely on the one hand as inner contact surfaces between the contact tongues and as outer contact surfaces in the outer region of the inner conductor and thus secure contact transitions with one at the same time high mechanical strength and a high current carrying capacity. The device can be used with both single-core and also multi-core cables with cables lying on one level are used, with contacting also under Tension can be done with little effort.

Safe contacting of the line (s) is easy Way achieved in that the contact element substantially is U-shaped, the contact element being a first Leg on which the contact tongues are formed, and one limiting the penetration depth of a first leg has second leg.

A splash-proof version of the device can can be realized in that the device for contacting one made of an electrically insulating material Has housing, the housing having a first recess for receiving the contact element and a second recess for receiving the line.

If the housing in the area of the contact element a third Has recess, which is arranged such that by the third recess a conductor to be rejected can be introduced, an electrical connection of the conductor to be branched done with the contact element in that a in the housing slidably mounted pressure piece the conductor to be branched pressing against the contact element can be a safer and more effective Branch contact to be made.

Easy handling for contacting the device results is characterized in that a for moving the pressure piece Screw is provided, which is provided in a housing Thread can be screwed in.

A multiple clamping, fixing and thus large area Contacting the contact tongues with the one to be contacted Head results from the fact that the contact tongues as three fork-shaped mutually offset contact tongues are, the contact tongues for large-area clamping and contacting the inner conductor of the cable are.

A multiple connection of lines can easily Can be achieved in that the housing has several contact elements for contacting several conductors, especially one Has ribbon cable, the contact elements accordingly the distance between the conductors to be contacted are.

A particularly advantageous form of implementation of the contact element, which in particular also has a high current carrying capacity has, is characterized in that on the contact element three fork-shaped contact tongues are formed against each other are spatially offset, causing the inner conductor pressed between the contact tongues and contacted over a large area becomes.

The invention is described below with reference to the figures illustrated embodiments described and explained in more detail.

FIG 1

ein Ausführungsbeispiel einer Vorrichtung zum Kontaktieren eines Flachbandkabels,

FIG 2

eine Prinzipdarstellung eines Schenkels eines Kontaktelements mit Kontaktzungen von vorne,

FIG 3

den in Fig. 2 dargestellten Schenkel eines Kontaktelements in der Draufsicht,

FIG 4

den in Fig. 2 und 3 dargestellten Schenkel eines Kontakelements in der Seitenansicht,

FIG 5

eine Prinzipdarstellung zur Kontaktierung eines Leiters mit Hilfe eines Kontaktelements in der Draufsicht,

FIG 6

eine Prinzipdarstellung zur Kontaktierung eines Leiters mit Hilfe eines Kontaktelements in der Seitenansicht und

FIG 7

eine Prinzipdarstellung einer Vorrichtung zum Kontaktieren einer Flachbandleitung mit einem Motor.

Show it:

FIG. 1

an embodiment of a device for contacting a ribbon cable,

FIG 2

a schematic representation of a leg of a contact element with contact tongues from the front,

FIG 3

the leg of a contact element shown in Fig. 2 in plan view,

FIG 4

2 and 3 leg of a contact element shown in side view,

FIG 5

1 shows a schematic diagram of the contacting of a conductor with the aid of a contact element,

FIG 6

a schematic diagram for contacting a conductor with the help of a contact element in the side view and

FIG 7

a schematic diagram of a device for contacting a ribbon cable with a motor.

Figure 1 shows an embodiment of a device for Contacting a ribbon cable 1. The ribbon cable contains in the embodiment shown in Figure 1 nine line wires 9, each having an inner conductor 12. The contacting device consists of a in a housing 6 arranged contact element 3, which is U-shaped is formed and a first leg 3a with molded Contact tongues 8a, 8b, 8c and a second leg 3b. The second leg 3b of the U-shaped contact element 3 contains no contact tongues and therefore serves as a height limitation when the contact tongues 8a, 8b, 8c penetrate the inner conductor 12 of the line core 9. In the housing 6 further a pressure piece 4 is provided, which is made of an insulating material exists and with the help of a bearing in the pressure piece 4 Screw 5 is movably mounted in the housing 6. For this purpose, a thread 16 is provided in the housing 6, in which the Thrust piece 4 longitudinally displaceable when screw 5 is turned is. With the reference numeral 17 is the movement stroke of the pressure piece 4 marked. The housing 6 also has in the area of the movement stroke 17, a recess 7 for carrying out of a cable. In the lower area of the housing 6 is a further recess 13 for receiving the ribbon cable 1 provided. The bottom part of the housing 6 is one Base plate 2 formed in the guide grooves of the housing is stored.

The device for electrical contact shown in Figure 1 is especially for a higher performance range, i.e. suitable for larger cable cross-sections and higher currents. For contacting the ribbon cable 1 in the Housing 6, for example after removing the base plate 2 inserted. The geometric arrangement of the contact element 3 with molded-on contact tongues 8a, 8b, 8c is corresponding the arrangement pattern of the line wires to be contacted dimensioned. The contact element 3 is in front the contacting process in the upper area of the movement stroke 17, i.e. the screw 5 with the mechanically coupled Pressure piece 4 is also at the top, as shown in Figure 1 is shown. The contacting process takes place through simply screw in screw 5. This will cause the pressure piece pushed in the direction of ribbon cable 1 and thus exercises a force on the contact element 3. The contact tongues 8a, 8b, 8c of the first leg 3a of the contact element 3 penetrate the insulation of the ribbon cable 1 and the Insulation 9 of the wire 2, 12. With the screwed in completely Screw 5 is the pressure piece in the lower Range of movement stroke 17. The contact tongues 8a, 8b, 8c have the inner conductor 12 of the line wires in this state 9, 12 contacted. The individual contact tongues 8a, 8b, 8c are designed as three fork-shaped contacts that are against each other are offset. As a result, the inner conductor 12 of the contact tongues 8a, 8b, 8c fixed, clamped and multiple, i.e. both on the inner contact surfaces and on the outer Contact areas, contacted over a large area. Due to the Large-area contacting is the device shown in FIG. 1 especially suitable for higher currents, i.e. the device has a high current carrying capacity. about the recess 7 in the housing 6 is a contact laterally inserted cable 15 possible. The registration of the cable 15 with the contact element 3 and thus with the inner conductor 12 can be done such that the inner conductor of the cable 15 with the help of the pressure piece 4 against the contact element 3 is pressed. For reasons of clarity in the embodiment shown in Figure 1 only the contacting is shown using a contact element 3. However, further contact elements can be arranged in the housing 6 be a contacting of the others in the ribbon cable 1 arranged lines allow.

Figure 2 shows a schematic diagram of a leg 3a of a Contact element, such as that in the figure 1 shown device is used. The thigh 3a has three contact tongues 8a, 8b, 8c, which are fork-shaped are offset from each other. The three forked contacts have proven to be particularly suitable, an inner conductor to contact safely and permanently. The reason this essentially lies in the fact that the inner conductor due to the three fork-shaped contact tongues offset against each other 8a, 8b, 8c fixed, clamped and several large areas is contacted. For this purpose, the contact tongues 8a, 8b, 8c on the inside of the inlet bevels, whereby the inner conductor to be contacted meandering between pressed the offset opposite contact tongues or squeezed. This does not result from how other insulation displacement technology known contacting only a point contact, but the type of contact provides a stable contact transition even for high currents In addition, the contact transition can also be subjected to high mechanical loads.

Figure 3 shows the leg 3a shown in Figure 2 in the Top view. It can be seen that the contact tongues 8a, 8b, 8c have inlet bevels lying on the inside, between which the inner conductor is during the marking process can press in extensively.

Figure 4 shows the leg shown in Figures 2 and 3 3a in side view. This shows that the contact tongues 8a, 8b, 8c also bevel downwards, for example, have a bevel angle of 20-25 °. This will cut the insulation exactly promoted in the contacting process.

Figure 5 and Figure 6 show a schematic diagram of a With the help of a contact element contacted line 9 in the Top view (Fig. 5) or side view (Fig. 6). The Line 9 consists of an inner conductor 12 and an insulating sleeve 9a, the inner conductor 12 having a multiplicity of individual wires 19a, 19b. From the contact element in the in Figure 6 shown view for reasons of clarity only the contact tongues 8a, 8b, 8c shown. The Contact tongues 8a, 8b, 8c each have a circular shape Contact tips 8d and inner contact surfaces 8f and outer contact surfaces 8e. Inner single cores 19b run between the reeds 8a, 8b, 8c and contact the inner contact surfaces 8f, while outer individual cores 19a between the contact tongues 8a, 8b, 8c and the insulating sleeve 9a run and contact the outer contact surfaces 8e.

Due to the contacting principle shown in FIG the spatially offset arrangement of the Contact tongues become the contact element with the inner conductor 12 the line 9 connected several times over a large area. In doing so the contact tongues 8a, 8b formed on the contact element, 8c by isolating the electrical to be contacted Line pressed in such a way that the single wires 19a, 19b of the inner conductor 12 on the one hand between the contact tongues 8a, 8b, 8c are clamped. This results from the offset opposite contact tongues 8a, 8b, 8c a meandering Course of the inner individual cores 19b of the inner conductor 12. In addition, the outer sides 8e of the contact tongues 8a, 8b, 8c additionally with the outer cable cores 19a contacted. This results in "double" contact areas 8e, 8f, namely on the one hand as inner contact surfaces 8f between the contact tongues 8a, 8b, 8c and as the outer Contact surfaces 8e in the outer region of the inner conductor 12. This leads to safe contact transitions with one at the same time high mechanical strength and a high current carrying capacity.

Figure 7 shows a schematic diagram of a device for Contacting a ribbon cable 1 with a motor 10. Am Motor 10 is a junction box 18 is provided on the various insulated lines 15 are led out. The lines 15 are used to make contact with the ribbon cable 1. Instead of the lines 15, plug connections can also be provided become. This is shown in FIG Embodiment in a housing 6 one of the number of conductors of the ribbon cable 1 corresponding number of contact elements intended. Only those are recognizable from the outside Screws 5, the contacting with the help of a pressure piece of the contact elements with the respective conductors 12 of the Produce ribbon cable 1. The contacting process takes place thereby already described in connection with Figure 1 Way. Instead of the lines 15 can plug connections are also provided.

The contacting device shown in FIG. 7 takes place for example in connection with a so-called energy bus system Application. There is both a power supply, as well as data coupling with devices to be connected, for example motors etc. via a corresponding contacting device. The one shown in Figures 1-5 The contacting principle can also be used, for example, at Retrofitting and expansion of such an energy bus system even under tension without great effort.

In summary, the invention thus relates to a device for electrically contacting an electrical line 9, in particular a ribbon cable 1. Such a device for contacting, for example, with a so-called Energy bus system required, in which various components, for example motors, control devices etc. to both the power supply and the Multi-core cable providing control function connected become. For a safe contact, that too is suitable for higher currents, a device for electrical contact proposed with a contact element 3, which at least on the side facing the line has two contact tongues 8a, 8b, 8c, the contact tongues to penetrate the line to be contacted 9 are provided and with respect to the axis of the to be contacted Line 9 are spatially offset from one another in such a way that an inner conductor to be contacted 12 to be contacted Line 9 pressed between the contact tongues 8a, 8b, 8c becomes.

Claims (8)

1. Device for bonding an electrical cable (9), in particular a flat conductor cable (1) with inner conductors (12) consisting of single wires, with a contact (3) which has at least two contact reeds (8a, 8b, 8c) on the side facing the cable, the contact reeds (8a, 8b, 8c) being provided for penetrating the cable to be bonded (9), characterised in that the contact reeds (8a, 8b, 8c) are spaced at intervals to one another along the shaft of the cable to be bonded (9) and are bevelled inwards on one of the internal surfaces (8f) facing towards the shaft, the device being suitable for bonding a cable, in which the dimensions of the contact reeds in relation to the shaft and the diameter of the inner conductor (12) to be bonded are such that when the contact (3) penetrates the inner conductor (12), single wires (19b) of the inner conductor (12) of the cable (9) are pressed between the contact reeds (8a, 8b, 8c), the single wires (19a, 19b) of the inner conductor (12) bonding the contact reeds (8a, 8b, 8c) both to a first internal contact surface facing towards the shaft, and to a second, outer contact surface (8e) facing away from the shaft.
2. Device according to Claim 1, characterised in that the contact (3) is designed essentially in a U shape, the contact (3) having a first arm (3a) to which the contact reeds (8a, 8b, 8c) are integrally moulded, and a second arm (3b) that limits the penetration depth of a first arm (3a).
3. Device according to one of Claims 1 or 2, characterised in that the device for bonding has a housing (6) consisting of an electrically insulating material, the housing (6) having a first recess (14) to accommodate the contact (3) and a second recess (15) to accommodate the cable (1).
4. Device according to one of Claims 1 to 3, characterised in that the housing (6) has a third recess (7) in the region of the contact (3), which is arranged such that the third recess (7) allows a branching cable (15) to be fed in, the branching cable (15) being electrically connected to the contact (3) by a relocatably mounted pressure plate (4) in the housing (6) pressing the branching cable (15) against the contact (3).
5. Device according to one of Claims 1 to 4, characterised in that a screw (5), which can be screwed into a thread (16) provided in the housing (6), is provided to enable the pressure plate (4) to be relocated.
6. Device according to one of Claims 1 to 5, characterised in that the contact reeds (8a, 8b, 8c) are designed as three fork-shaped contact reeds (8a, 8b, 8c) offset from one another, the contact reeds (8a, 8b, 8c) being provided to enable the inner conductor (9) of the cable (1) to be clamped and bonded over a large area.
7. Device according to one of Claims 1 to 6, characterised in that the housing (6) has a plurality of contacts (3) for bonding a plurality of cables (9), in particular a flat conductor cable (1), the contacts (3) being arranged in each case according to the spacing of the cable to be bonded.
8. Device according to Claims 1 to 7, characterised in that the three fork-shaped contact reeds (8a, 8b, 8c) are moulded to the contact (3), and are spaced at intervals to one another such that the inner conductor (12) is pressed between the contact reeds (8a, 8b, 8c) and bonded over a large area.

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