EP0966064B1 - Multipole electrical connector - Google Patents

Abstract

Multipole connector for connecting a multipole stranded conductor cable with a cable receptacle and a plug-in part, the stranded conductors for axially contacting the free ends with associated contact spikes of the plug-in part being guided in axially parallel channels of the cable receptacle and being clamped in the ducts by means of a union nut. The cable receptacle has a stranded conductor holder for immovably fixing the stranded conductor and then an end holder facing the plug-in part. The stranded conductor holder consists of a fixed fixing plate facing the end holder and a clamping plate which can be moved in the axial direction and which uniformly clamps each stranded conductor immovably against pulling movements when moving in the direction of the fixing plate. The end bracket is designed to be elastic at least over the penetration length of the contact spikes into the channels in the radial direction in order to produce a substantially uniform radial pressing pressure in all channels with an adapted channel diameter when contact pins are inserted by squeezing together on the circumference. This design allows a very short multi-pin connector, in which the number of stranded conductor channels and their assembly has no influence on the clamping. At the same time, the clamping takes place close to the contact area in order to avoid upsetting the stranded conductors in the channels. In addition, this design prevents tiling of the stranded conductor insulation when the kiosk is inserted through flexible duct walls, but on the other hand ensures permanent and uniform contact pressure on the compacted stranded conductor.

Description

The present invention relates to the use of a disc-shaped at least partially rubber-elastic bracket in a Plug connection and a multi-pin connector for connecting a Multi-core stranded conductor cable according to the preamble of claim 3.

From US 4,593,962 an electrical connector is known for Use in a highly stressed diesel unit, among others a has rubber-elastic sealing washer, through the holes the individual Leads are passed through. In addition, there is a on the outside of the seal Cover disc arranged, which also holes for passing the strands having. The sealing washer is in contact with the circumference, however, a clamping of the strands, for example against strain relief by means of additionally slotted clamping sleeves. The sealing washer serves actually only the sealing of the ends of the strands Plug contacts. GB 830,192 describes a clamping and sealing device known to connect one or more elongated parts, such as for example cables in a mechanical or electrical connection in disclosed in a dirt-proof and mechanically safe manner. To the device has a conically shaped part arranged on the circumference Attacks on the channels through which the strands are passed. The canals themselves also have stops, for example for the contact pins, by they are designed with different diameters. The conical The rubber-elastic part is assembled on the circumference through the housing pressed together so that it is securely sealed around the in the channels lying conductor.

A connector according to the preamble of claim 3 is from DE 44 18 259 C1 known. This connector consists of a distributor Inclusion of the stranded wire, one from a handle and one Cable gland with pressure screw built-up cable holder as well a contact carrier with contact skewers arranged in contact chambers and a union nut for attaching the cable holder to the distributor formed plug-in part. The cable end part of the distributor is in cross section designed as an octagon, with the eight flat outer surfaces facing each other Taper towards the end. The inner contour of the mating section of the The shape of the handle is the outer contour of the cable-side end part of the Distributor adapted. The distributor is made up of four axially parallel channels Admission of non-stripped stranded wire penetrated, the Partitions of two channels and the opposite External walls between the channels and the corresponding lateral surfaces Have slots. This forms two resilient outer parts that the cable-side end part under the action of radial forces as a clamping area for the Make stranded wire effective.

When assembling the connector, it is necessary to end the Stranded conductor cable with a length that is slightly longer than that of the distributor stripping. After the insertion of the stranded wire should be done by means of the missing Outside parts already a slight clamping of the stranded wire in the clamping area of the Distribution piece done, but in practice this is not sufficient to prevent that already inserted in the assembly Stranded conductors change their positions and get out of the channel again move. By designing the resilient outer parts by means of slots for Clamping the stranded conductors is always a common jamming of the Stranded wire. As a result, the contact pressure on the due to tolerances Stranded conductor not evenly distributed and already the lack of a stranded conductor significantly affects the clamping effect. By clamping the stranded wire on the one hand, there is the possibility of a relatively far distance from the contacting zone Pushing back the stranded wire during the contacting process and thus the Risk of poor contact, on the other hand the possibility of Movement of a stranded wire in the direction of pull due to the kinking of the cable during the service life of the connector. Even cables with Different strand conductor cross sections require one specifically for this tailored connector. For inserting the contact skewers into the front ends of the stranded wire can be caused by slight misalignment or by an unfavorable tolerance and the resulting high radial Pressing a flow of the strands already take place, which is also the Contact severely impaired.

The present invention is therefore based on the object, the above eliminate the disadvantages listed and a possibility for special fast and safe assemblies, preferably multi-pole Propose stranded wire.

This object is achieved with the features of claim 1 and of claim 3 solved. Further advantageous configurations are the respective according to related subclaims.

In a multi-pin connector with one cable holder and one Plug-in part becomes a disk-shaped, at least partially, rubber-elastic trained bracket with channels for receiving stranded wires Multi-core stranded cable used as end bracket to the front the stranded wire ends of the pressed contact skewers of a plug-in part to clamp with the stranded wire for a safe and durable contact to manufacture. For the contacting is essentially a uniform one radial contact pressure in all channels with adapted channel diameter on the Ends of the stranded conductor, at least over the penetration length of the contact spikes, and generated the inserted contact skewers. Preferably the end bracket when joining the plug-in part with the cable holder on the circumference the plug-in part squeezed radially.

The cable holder of the multi-pin connector includes one Strand conductor holder for immovable fixing of the strand conductor and on it then an end bracket facing the plug-in part, which in the Penetrate contact skewers. The stranded conductor holder has a fixed, the End bracket facing fixation plate and a movable in the axial direction Clamping plate on each stranded wire when moving towards the fixing plate evenly stuck immovably against train movement. The end bracket is at least over the penetration length of the contact skewers in the channels in a radial Elastic direction to pass through when inserted contact skewers Squeezing together on the circumference essentially for contacting uniform radial pressure in all channels with adapted Generate channel diameter. The stranded conductors are in the clamping plate individually managed and can already prevent premature and Unwanted extraction secured when assembling other stranded conductors become. By moving the clamping plate in the direction of the fixing plate a parallel, but individual and uniform jamming of each strand, see above that it is irrelevant whether all channels provided in the connector have Strand conductors are occupied.

The end bracket is made of an elastic plastic or rubber material and takes the radial pressure and jammed for a good contact the front in the Stranded wire penetrating contact skewers.

For the assembly, the non-stripped wire conductors are led through the channels the cable holder with the clamping plate and the fixing plate as well as the one on it subsequent end bracket performed. The end bracket can on the Plug side facing a stop for the stranded wire. If all stranded wires are plugged in, the clamping plate is inserted along the stranded wire Moved towards the fixing plate. The stranded conductors are against every movement jammed. Then the plug part with the contact skewers into the channels the end bracket inserted, with a through the elastic training corresponding uniform pressure in the radial direction on the channels and so that it is exerted on the strands.

This arrangement thus allows a quick and safe assembly, whereby due to the independent stranded wire clamping both Contact distances of the smallest and largest dimensions can be produced can. There are arrangements of any pole pattern and number of stranded conductors possible. Different stranded wire cross sections in one tolerated Cross-sectional areas can be realized with a stranded wire holder. The The stranded wire is clamped directly in front of the contacting zone, so that the Compression length of the stranded wire in the contact zone to the smallest possible dimension reduced and a pushing back of the stranded wire during the Contacting process is prevented. The elastic end bracket guides you permanent contact pressure on the condensing strands. Through constructive The design and the corresponding modulus of elasticity allow the contact pressures to be so be dimensioned such that no material flow which impairs the contacting for wire insulation in the contact zone when inserting the contact skewers arises, which could have a lasting influence on contact pressure. So that can a constant contact resistance over a longer period of time be ensured.

According to a further preferred embodiment, the as elastic pressure plate trained end bracket advantageously on Arched circumference. According to a further preferred Embodiment the plug part when inserting the contact skewers into the channels of the pressure plate, press the pressure plate together around the circumference required contact pressure in the channels and the elimination of Existing play between stranded wire and channels for an optimal Contacting and an exact centering to the contact skewers too guarantee. The channels in the pressure plate are advantageously on the Plug side facing thin-walled closed to a stop for to form the stranded wire.

The elastic holding of the stranded wire ends in the end bracket means that Danger of upsetting and pushing back the stranded wire. According to one preferred embodiment therefore points the clamping plate in the direction Fixing plate pointing, at the free end tapered clamping domes for the Inside the stranded conductor, which can be inserted in the longitudinal direction of the dome. The wall of the Clamping domes are used to reduce the channel cross-section in the radial direction compressible and fix the stranded wire in the area of the dome foot and the Dome tip to prevent it from accidentally slipping out during assembly avoid. When assembling with the fixing plate, the clamping domes arrive with its conical end in a correspondingly trained and the Dome tip compressing recess in the fixing plate, so that everyone Stranded conductor individually and independently of the one acting on other stranded conductors Press pressure is jammed. By moving the clamping plate along the Stranded wire, all stranded wires are jammed in parallel. The jamming the stranded wire is thus as close as possible to the end bracket and Squeezes are excluded. This also leads to a short one Cable holder and thus also to a short connector.

According to a further embodiment, the clamping plate with the fixing plate for example by means of a snap, bayonet or screw connection, in particular union nut, continuously connected and held, the Clamp domes get into the recesses of the fixing plate when connecting. This ensures a permanent jamming and securing of the stranded wire realized.

The cable holder and the plug-in part are also continuously, preferably with a snap, bayonet or screw connection, in particular Union nut, connected, with the connection pushing in the face the contact skewers in the stranded wire and the extensive coincidence of the Pressure plate is done. This allows the indentation and compression without great effort and a permanent and safe contact will be realized.

According to a preferred embodiment, it covers the plug-in part and the Snap, bayonet or screw connection connecting the cable receptacle Clamping plate and fixing plate connecting snap, bayonet or Screw connection. This measure also helps to shorten the Plug connector and serves to additionally secure the jamming of the Stranded conductor in the cable holder.

Fig. 1

einen Längsquerschnitt durch den Steckverbinder mit einer Druckplatte als elastische Endhalterung und

The invention is explained in more detail below in connection with the figure using an exemplary embodiment. It shows:

Fig. 1

a longitudinal cross section through the connector with a pressure plate as an elastic end bracket and

The figure shows a longitudinal section through a multipole connector 1, the upper half of the connector 1 in the open state with already in the Channel 8 inserted stranded wire 7 and the lower half of the figures Connector 1 shows in the assembled state. The connector 1 has a cable holder 2 and a plug-in part 3, which by means of a Union nut 4 are joined. The cable holder 2 includes one Stranded conductor holder 5 and a flexible pressure plate 6 as an end holder. To the Insertion of the individual stranded conductors 7 of a stranded conductor cable 22 are in the Cable receptacle axially parallel channels 8 provided in the stranded wire in the 1 to a stop 9 in the form of a thin Wall can be inserted into the elastic pressure plate 6. It is also possible not to provide a stop and push the stranded wire through and all on the cut off the same length. When the stranded conductor 7 is inserted into the channels 8 the stranded conductors first reach a movable one via an insertion funnel 10 Clamping plate 11 of the stranded conductor holder 5. This clamping plate consists of a Plate with individual with a longitudinal slot 27 clamping domes 12, the enclose the respective channel. The clamping domes are thin-walled and tapered at the top. The channel 8 inside the clamping dome 12 is formed such that the wall of the clamping domes 12 in the area of Dome tip 13 and dome foot 14 lightly fix the inserted stranded wire, in order to avoid slipping back during the assembly of other stranded conductors, but allow you to pull it out. After the movable clamp 11 the stranded wire arrives in a fixed position with the subsequent pressure plate 6 connected fixing plate 15 of the stranded conductor holder 5 and then in the Pressure plate 6 up to the stop 9. The fixing plate 15 has the corresponding External dimensions of the clamping domes 12 formed recesses 16 in the clamping domes 12 in the direction of the movement of the clamping plate 11 Fixing plate 15 arrive. The stranded wires 7 are immovable against Pull out substantially the entire length of the channel in the each clamp dome 12 jammed close to the pressure plate 6. The movement the clamping plate 11 and the connection to the fixing plate 15 is infinitely variable by means of a union nut 17. In the event of aging of the Strand conductor clamping against a decreasing clamping effect act, is between the union nut 17 and the clamping plate 11 Stranded conductor holder 5 a spring element 23, for example wave washer, inserted. When the union nut 17 is in the end position, this spring element 23, seen over a longer period of time, an adjustment movement within the Carry out gap dimension 24 in the direction of the fixing plate 15.

The elastic end bracket is as one Pressure plate 6 made of a rubber-elastic material, the circumference has a convex curvature 18. When joining the cable holder 2 with the plug-in part 3 by means of the union nut 4, the plug-in part 3 with the Contact skewers 19 are pressed into the end of the stranded conductor 7. The Stop 9 is pierced by the tip of the contact spike 19. The Contact spit 19 serves in a known manner on the one hand for contacting of the strands in the stranded conductor 7 and with the opposite end of the Contacting a correspondingly designed not shown Mating connector. During the movement of the plug part 3, the effect on the inside Scope of the plug-in part 3 arranged edges 20 and 21 a pressing together the elastic pressure plate 6 in the radial direction, so that the channel cross section adapts to the actual cross section of the inserted stranded conductor 7. At the same time, the contact skewer 19 is pressed in, which creates a counter pressure generated from the inside in the radial direction. This means that at the same time the existing tolerance differences of the elastic pressure plate 6 and that entire play between the stranded conductor 7 and the respective channel 8 is eliminated. The axis center points of the respective channels 8 are also defined by the edge 20 brought exactly to the subsequently penetrating contact skewers 19 in alignment. Then the contact skewers 19 penetrate into the ends of the front Stranded wire 7 to contact the wires. The stranded wire ends with the Insulation enclosing strands bulge as a result. The elastic pressure plate 6 exerts a permanent contact pressure on the compressed strands 7. By Appropriate training of the material properties can be essential Material flow avoided in the stranded conductor insulation in the contact zone that could have a lasting impact on contact pressure.

By using an elastic end bracket according to FIG. 1 exists due to insufficient fixation of the stranded wire ends at Inserting the contact spikes 19 increases the risk of pushing back the stranded conductor 7. However, as can be seen from the figure, this is always prevented by the fact that the stranded wire with the clamping domes 12 in the fixing plate 15 very close to the Contact area of the contact spikes 19 are fixed in the end bracket. The distance of the clamping area from the contact zone beginning with the end bracket to the smallest possible dimension, which is due to the minimum thickness of the Fixing plate, reduced. A pushing back of the stranded wire 7 during This reliably prevents contacting.

The formation of the stranded conductor holder 5 in the form of a movable Clamping plate 11 and a fixing plate 15 cause the stranded conductors to be jammed 7 in parallel, but independently of each other with regard to the clamping pressure. As a result the connector can be used with any number of channels be provided, it is not necessary that all channels with stranded wire are equipped to securely clamp the individual stranded wires. Furthermore can by this design of the stranded conductor holder 5 in a certain Range of different strand diameters can still be jammed. There are thus not separate cable receptacles for each stranded conductor diameter adapted diameters of the channels required.

As can be seen from the figure, when assembled, covers the Union nut 4, the cable holder 2 with its union nut 17, the Movable clamping plate 11 connects to the fixing plate 15. This makes it easy to be assembled and shorter compared to the prior art Connector provided.

Claims (5)

1. A use of a disk-shaped at least partially rubber elastic mount (6) with channels (8) to accommodate the individual strands (7) of a stranded conductor running essentially parallel to the center axis perpendicular to the mount (6), in a multipole plug connector (1) with a cable receptacle (2) and a plug part (3) with contact spikes (19) for coaxial contacting of the free ends of the stranded conductor (7) as the terminal mounting (6), which is squeezed together radially for contacting the contact spikes (19) with the ends of the stranded conductor (7), so that an essentially uniform radial pressure is created for contacting in all channels (8) with a matched channel diameter on the ends of the stranded conductors (7), at least over the penetration length of the contact spikes, and the inserted contact spikes (19).
2. A use according to Claim 1, where the terminal mounting (6) is squeezed together radially by the plug part (3) on the periphery in joining the plug part (3) to the cable mounting (2).
3. A multipole plug connector for connecting a multicore stranded conductor with a cable receptacle and a plug part, where the stranded conductor for axial contacting of the free ends with the respective contact spikes of the plug part is guided in axially parallel channels of the cable receptacle and held and clamped in the channels by means of a continuously adjustable connection, characterized in that the cable receptacle (2) comprises a stranded-conductor mount (5) to immovably fasten the stranded conductors (7) and joining it, a terminal mounting (6, 25) facing the connection piece (3), with the stranded-conductor mount (5) comprising a stationary fastening plate (15) facing the terminal mounting (6, 25), and a clamping plate (11), movable in axial direction, which when moving in the direction of the fastening plate (15), evenly and immovably clamps every stranded conductor (7) against pulling movements; and in that the terminal mounting (6, 25), at least over the penetration length of the contact spikes (19) into the channels (8), is elastic in radial direction in order to generate, by squeezing, essentially even radial pressure around the inserted contact spikes (19) at the circumference, for reliable contact in all channels with matched channel diameter.
4. A connector according to claim 3, characterized in that the connection piece (3) squeezes the channels (8) of the pressure plate (6) at the circumference on insertion of the contact spikes (19).
5. A connector according to one of the preceding claims 3 or 4, characterized in that the clamping plate (11) comprises clamping spikes (12) conically tapering off at their free ends (13) and pointing in the direction of the fastening plate (15), for the stranded conductors (7) which in the interior can be inserted in longitudinal direction of the spikes; with their walls - to reduce the cross-section of the cable - being squeezable in radial direction, fastening the stranded conductors (7) in the area of the spike base (14) and the spike tip (13), said spike tip (13) being moved to a respective recess (16) in the fastening plate (15) during joining, thereby pressing together the spike tip (13).

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