DE202015009640U1 - welding connector - Google Patents

Abstract

Conduit seal (1) of a wiring harness (2) consisting of at least three individual conductors (2.1, 2.2, 2.3), wherein the conduit seal (1) for sealing a connection portion (20) of the wiring harness (2) is formed with at least the following feature:
in a to the connection section (20) adjacent region (21) of the wiring harness (2) has a seal between the cable jacket (2m) of the individual lines (2.1, 2.2, 2.3) positively and / or cohesively from the cable jacket material of the individual lines by entry of heat energy and Melting of the cable sheath material produced, wherein the sealing is accomplished exclusively by gluing and / or melting and material connection of at least a portion of the cable sheath material of the respective cable sheath (2m) of the affected individual lines (2.1, 2.2, 2.3).

Description

The invention relates to a sealed conduit arrangement provided with at least one conduit seal.

It is known in the art to use electrical leads for transmitting electrical power and for transmitting electrical signals.

Especially in applications where moisture, water and liquids come in contact with the lines and line connections, such. As in motor vehicles, the wiring connections such. As welding points and welding node of interconnected lines to protect against environmental influences. It is also known that in the case of lines which are electrically insulated by a jacket to the outside, a transport of water or liquids can take place longitudinally along the line. If one end of such a line is supplied with water or liquid, it can be transported along the line to the other end of the line or a connection point

In many technical applications, such water transport along an electrical line is undesirable. The line connections must be protected accordingly before a water entry. The number of lines in a connector is generally different and individual for almost every node, so it is necessary to master a wide range of values.

For this purpose, it is provided in the prior art, two or more exposed i. to connect stripped wire ends together (for example by welding) and electrically isolate this connection point by a shrink-on and shrunk on this junction and sealed against environmental influences.

Known heat shrink tubing are designed and positioned on the line ends, that this surrounds the exposed ends of the line as well as an isolated line section adjoining this exposed line end region with a large area and also with a projection at the end. It is also known that the shrink hoses have so-called hot melt adhesives to achieve improved insulation and sealing of the joint. Another sealing technique is known in automotive / wiring harness, it is Butylstreifen that must be applied very expensive manually around each line.

Two or more electrical conductors can be connected together at their exposed joints by a variety of connection types. The term compound should be used in particular in the automotive sector soldering and welding joints, in particular ultrasonic welding.

A wiring harness or cable bundle means an arrangement of a plurality of insulated conduits (e.g., stranded wires) provided with an insulating jacket. In automotive applications, such trunking bundles are e.g. connected by means of ultrasonic welding and sealed by means of a shrink tube. After the welding point, the cables may run in the longitudinal direction possibly disorderly and not parallel. This prevents the even distribution of the hot melt adhesive and leads to leaks. Such sealing solutions regularly have problems, so that sought after improved solutions.

The DE 102008026352A deals with the optimized sealing of such a connection point. However, this document is devoted to the problem that at these joints often protruding Einzelleiterlitzen or protruding wires damage the joints covering these joints by perforations or notch effects and thus make leaking and suggests a solution as a protective element for a junction and a method for applying this protective element on the Junction before.

Another problem, which is insufficiently solved in the prior art, is that the heat-shrinkable tube surrounds the individual cables arranged next to one another in a jacket-like manner from the outside. However, it happens again and again that moisture along the insulation between the individual lines occurs and passes along the insulating jacket to the junction. A sufficiently reliable sealing of the lines with each other is not known from the prior art.

The invention is therefore based on the object overcoming said disadvantages and to provide a sealing solution with which a line connection or a connection of two line bundles of a plurality of individual lines can be reliably and inexpensively sealed.

This object is achieved with the features of claim 1.

The basic idea of the invention lies in the fact that in a region of the line bundle adjacent to the connection section or connecting section of the lines of a line bundle Seal between the cable sheath of the individual lines form-fit and / or cohesively from the cable sheath material of the individual lines and / or a filler material is created by the entry of heat energy and melting of the cable sheath material and / or the filler material.

The second alternative mentioned above is e.g. the introduction of a special sealing element as a filler around the individual lines (especially before the application of a shrink tube), which is adapted in each case to the line geometry and wherein the sealing elements brought by energy input with each other and with the individual lines in a sealing, preferably positive and / or material-line line seal become.

1. a) in einem zum Anschlussabschnitt (Verbindungsabschnitt) benachbarten Montagebereich des Leitungsstranges werden um den Leitungsmantel der Einzelleitungen herum, ein den jeweiligen Adermantel der Einzelleitung umschließendes Dichtstoffelement aufgebracht;
2. b) die Dichtstoffelemente werden dann mittels einer mechanischen und/oder thermischen Energiezufuhr miteinander in eine materialschlüssige Verbindung gebracht, derart, dass die so erzeugte Leitungsdichtung jeden Leitungsmantel der Einzelleitungen allseitig formschlüssig umgibt.

According to the invention, therefore, a line seal is advantageously proposed which has been produced by a method for producing such a line seal comprising at least three (preferably also several) individual lines, wherein the line seal for sealing a connection section of the line is formed with the following steps:

1. a) in a to the terminal portion (connecting portion) adjacent to the mounting portion of the wiring harness are applied around the cable sheath of the individual lines around, a the respective core jacket of the single line enclosing sealant element;
2. b) the sealant elements are then brought together by means of a mechanical and / or thermal energy supply in a material-locking connection, such that the line seal thus generated surrounds each cable sheath of the individual lines form-fitting on all sides.

Advantageously, it is provided that for each individual line, a separate sealant element is used, which is mounted on the single line.

In a particularly preferred embodiment of the invention, it is provided that the sealant elements are designed as cylindrical tubes and more preferably are formed from a heat-meltable adhesive (eg a hotmelt adhesive). In this case, in step b) in addition to the thermal energy for heating the Dichtstoffröhrchen also a mechanical pressure can be expended to bring the present in the melt phase sealant tubes particularly efficient with each other in material by "bake" or hot pressed together.

It is particularly advantageous if the sealant elements or sealing tube stick together by melting on the sheath of the individual lines and thus form a circumferential seal around each individual line. The space between adjacent individual lines is filled and sealed in particular by the compression of the molten sealant tubes.

If the process parameters are suitably adjusted with regard to material, temperature and / or pressure, a cohesive connection can be formed between the sealing tube, so that the original boundary surfaces between adjoining sealing tube partially or completely disappeared or "baked" together.

It is further provided with advantage that the sealant elements are preferably mounted automatically before connecting or welding the connection section to the individual lines.

In a further advantageous embodiment of the invention it is therefore provided that the sealant elements before o.g. Step b) are fixed in a defined mounting position next to each other in a respective parallel section of the individual lines. For this purpose, it may be provided that a Verlierschutzelement or a clamping element is provided.

The fixation of the sealant elements can be effected by means of a molded or formed on the respective inner shell mechanical clamping element, preferably an elastically acting clamping element or by gluing or melting and material connection of at least part of the inner shell of the sealant on the outer jacket of the respective cable jacket of the affected individual lines. This fixation is important for a defined position and enables the pre-assembly process as usual in the line industry.

According to the invention, it was further recognized that the attachment of insertion bevels on the sealant tube or shrink tube improves the ease of installation.

The process for the preparation and installation of the sealant tubes can be carried out as follows: cutting, stripping the tubes, attaching the tubes, fixing in their intended mounting position and melting the sealant tubes.

The tubes can advantageously be cut to the desired length by a hose according to the diameter of the tube become. To attach to the line can be first expanded by means of a widening device, the inner diameter of the sealant tube. The adhesive fit on the line results from a clamping element as described above, which according to the invention can also be provided by a defined undersize of the inner diameter of the sealing-substance tube with respect to the outer diameter of the line.

Alternatively, the sealing tube can also be made with a conical shape and the "smaller" diameter in the conical region can be chosen so that the sealant tube on the corresponding mounting portion of the line clamps intended.

The entire process is preferably designed automated and monitored control technology. Thus, the supply of the Dichtstoffröhrchen to the mounting device, which were previously cut at a cutting station to a desired length, be done with advantage by means of a vibrating conveyor.

Another aspect of the present invention relates to a device for heating the melting range of the sealant tubes. Thus, in step b), the thermal energy supply to the sealant elements via a heatable pliers tool made their pliers heating elements that surround the sealant elements for heating and preferably then followed by a compression of the molten portion on the pliers.

The invention further provides a method for producing a sealed line connection between a first connection section of a first line strand and a second connection section of a second line section, which are preferably both formed with a line seal by the method described above, wherein welding of the connection sections is also preferred after connection Shrink tubing shrunk at least partially, preferably completely covering the line seals.

Alternatively, it can also be provided that the heating is carried out for melting the sealant tube and the shrink tube in one operation. For all applications, it is preferable for the sealed connectors, preferably a shrink tube without internal adhesive is used. Alternatively, a shrink tube with inner adhesive can be used.

Other advantageous developments of the invention are characterized in the subclaims or are shown in more detail below together with the description of the preferred embodiment of the invention with reference to FIGS.

• 1 eine schematische Ansicht einer erfindungsgemäßen Verbindungsanordnung in einem Herstellungszwischenschritt;
• 2 eine schematische Ansicht einer alternativen erfindungsgemäßen Verbindungsanordnung bei dem die Dichtung durch ein „Verkleben“ bzw. „Verbacken“ der Einzelleitungen hergestellt wird;
• 3 eine schematische Schnittansicht durch einen Leitungsstrang aus drei Litzenleitern in zwei unterschiedlichen Herstellungszwischenschritten;
• 4 eine schematische Darstellung eines erhitzbaren Zangenwerkzeuges zum Aufschmelzen der Dichtstoffröhrchen und
• 5 eine schematische Ansicht einer erfindungsgemäßen Verbindungsanordnung in einer weiter alternativen Ausführungsform zu 2.

Show it:

• 1 a schematic view of a connection arrangement according to the invention in an intermediate manufacturing step;
• 2 a schematic view of an alternative connection arrangement according to the invention in which the seal is made by a "gluing" or "caking" of the individual lines;
• 3 a schematic sectional view through a wire harness of three stranded conductors in two different manufacturing intermediate steps;
• 4 a schematic representation of a heatable pliers tool for melting the sealant tube and
• 5 a schematic view of a connection assembly according to the invention in a further alternative embodiment to 2 ,

In the following the invention will be described by means of embodiments with reference to FIGS 1 to 5 explained in more detail, wherein like reference numerals refer to the same structural and / or functional features.

In the 1 is a schematic view of a connection arrangement according to the invention 100 shown.

The 1 is a purely schematic representation of a connection arrangement 40 in an intermediate stage of the method according to the invention, in which the two individual lines 2.1 ' . 2.2 ' a first wiring harness 2 ' with its connection sections 20 'with the three individual lines 2.1 . 2.2 . 2.3 a second wiring harness 2 with its connection sections 20 on a line connection 50 are connected to each other by a weld according to an application-specific wiring scheme.

At both line strands is in one to the respective connection section 20 . 20 ' adjacent area 21 . 21 ' around the respective cable jacket 2m respectively. 2m ' the individual lines 2.1 . 2.2 . 2.3 respectively. 2.1 ' . 2.2 ' a the respective cable jacket 2m enclosing sealant element 10.1 . 10.2 . 10.3 respectively. 10.1 ' . 10.2 ' applied, but not yet melted according to the method described above. Around the assembly is a shrink tube 40 indicated schematically.

According to the invention, the connection arrangement 100 in the fields of 21 . 21 ' by Wäremeintrag in the in the 2 shown schematically indicated state. For this purpose, an inventive and indeed heatable pliers tool 30 with pliers 30.1 . 30.2 , like in the 4 (also shown only schematically) used to seal the tubes 10.1 . 10.2 . 10.3 respectively. 10.1 ' . 10.2 ' melt up and if necessary by means of additional pressure form-fitting and material-locking around the cable jacket 2m to press around.

In the 2 is shown another sealing principle, namely a schematic view of an alternative connection arrangement according to the invention in which the seal is made by gluing the insulation. Thus, the insulation material of all lines can be glued in a bundle by heat and pressure and then forms a firm and tight bond. For thermoplastics, such as PVC, this is achieved particularly advantageous. The heat energy can be supplied by means of heating elements or by means of ultrasound.

The compound can be e.g. can be achieved via a pliers-shaped, heated tool. This embodiment requires no filler material, which is an advantage for the production and the cost. For larger cable cross-sections, however, it may be necessary to additionally supply an additional material.

The entire process is preferably carried out automatically, with the processes being monitored. He can e.g. be integrated in the pre-assembly and in the band assembly.

The previously explained principle of action is based on the 3 again clarified. There is a schematic sectional view through a wiring harness 2 from three stranded conductors 2.1 . 2.2 . 2.3 (also in two different manufacturing steps) shown, each of a cable sheath 2m are surrounded. In the left picture of the 3 can moisture or liquid through the opening in the space 3 between the individual lines 2.1 . 2.2 . 2.3 pass through.

Be the sealant tubes 10.1 . 10.2 . 10.3 fused according to the method according to the invention or baked together under pressure, the result is a as in the right figure of 4 schematically shown line seal 1 , The gap 3 is now complete with sealing compound of the sealant tube 10.1 . 10.2 . 10.3 filled or sealed by baking. It would also be conceivable to use a combination of the principles of action in which, after the sealing tube has melted, a caking of the melted phase is achieved by pressure.

In the same way, the line seal 1' generated. At the same time or after, the heat shrink tubing 40 shrunk so that one like in 2 schematically illustrated sealed connection arrangement 100 is obtained.

In the 5 is a schematic view of a connection arrangement according to the invention 100 shown in an alternative embodiment. To the area 21 respectively. 21 ' of the strands of wire 2 respectively. 2 ' is a mechanical clamp 4 . 4 ' arranged, which provides an additional mechanical connection and prevents the seal from diverge or leaves an unintended passage open.

However, the invention is not limited in its execution to the above-mentioned preferred embodiments. Rather, a number of other variants is conceivable, which makes use of the illustrated solution even with fundamentally different types.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008026352 A [0009]

Claims (9)

Conduit seal (1) of a wiring harness (2) consisting of at least three individual conductors (2.1, 2.2, 2.3), wherein the conduit seal (1) for sealing a connection portion (20) of the wiring harness (2) is formed with at least the following feature: in a to the connection section (20) adjacent region (21) of the wiring harness (2) has a seal between the cable jacket (2m) of the individual lines (2.1, 2.2, 2.3) positively and / or cohesively from the cable jacket material of the individual lines by entry of heat energy and Melting of the cable sheath material produced, wherein the sealing is accomplished exclusively by gluing and / or melting and material connection of at least a portion of the cable sheath material of the respective cable sheath (2m) of the affected individual lines (2.1, 2.2, 2.3). Cable seal (1) according to Claim 1 , wherein - in a to the connection portion (20) adjacent region (21) of the wiring harness (2) a seal between the cable jacket (2m) of the individual lines (2.1, 2.2, 2.3) positively and / or cohesively from a filler material by entry of heat energy and Melting the filler material was created. Cable seal (1) to Claim 1 or 2 , characterized in that a) in the region (21) of the cable line (2) adjacent to the connection section (20) around the cable jacket (2m) of the individual lines (2.1, 2.2, 2.3), a sealing element element (10.1 , 10.2, 10.3) was pushed or applied as an additional material and b) the sealant elements (10.1, 10.2, 10.3) were brought into a material-locking connection with one another by means of a mechanical and / or thermal energy supply, such that the line seal (1) formed in such a way Cable sheath (2m) of the individual lines (2.1, 2.2., 2.3) surrounds all sides form-fitting manner. Cable seal (1) according to one of Claims 1 to 3 , characterized in that a separate sealant element (10.1, 10.2, 10.3) was used for each individual line. Conduit seal (1) according to one of the preceding claims, characterized in that the sealant elements (10.1, 10.2, 10.3) are designed as cylindrical tubes. Conduit seal (1) according to one of the preceding claims, characterized in that the fixing of the sealant elements (10.1, 10.2, 10.3) by means of a respective inner jacket of the sealant elements (10.1, 10.2, 10.3) molded or formed there mechanical clamping member, preferably an elastically acting Clamping element takes place. Conduit seal (1) according to one of the preceding claims, characterized in that the sealing is accomplished exclusively by gluing and / or melting and material connection of at least a portion of the cable sheath material of the respective cable sheath (2m) of the affected individual lines (2.1, 2.2, 2.3). A line connection (50) with a line seal according to one of the preceding claims, wherein between a first connection section (20) of a first line (2) with a second connection section (20 ') of a second line (2'), wherein after connecting the connection sections (20 , 20 ') a heat-shrinkable tube (40) has been shrunk over at least partially or completely covering the line seals (1). A line connection (50) between a first connection section (20) of a first line strand (2) comprising at least three individual lines (2.1, 2.2, 2.3) with a second connection section (20 ') of a second line strand (2'), wherein at least the first connection section (20) is sealed with a line seal (1), which is formed at least with the following feature: in a to the connection section (20) adjacent region (21) of the wiring harness (2) has a seal between the cable jacket (2m) of the individual lines (2.1, 2.2, 2.3) positively and / or cohesively from the cable jacket material of the individual lines by entry of heat energy and Melting of the cable sheath material produced, wherein the sealing is accomplished exclusively by gluing and / or melting and material connection of at least a part of the cable sheath material of the respective cable sheath (2m) of the affected individual lines (2.1, 2.2, 2.3) and wherein after a connection of the first connection section (20) and the second connection section (20 '), a shrink tube (40) is at least partially shrunk over the line seals (1) in a covering manner.

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