WO2010034432A1

WO2010034432A1 - Cable bushing element, and method for forming a cable bushing element

Info

Publication number: WO2010034432A1
Application number: PCT/EP2009/006751
Authority: WO
Inventors: Daniel Reiter
Original assignee: Leoni Bordnetz-Systeme Gmbh
Priority date: 2008-09-23
Filing date: 2009-09-18
Publication date: 2010-04-01
Also published as: DE102008061185B4; DE102008061185A1

Abstract

The invention relates to a cable bushing element (2) for leading through several individual cables (8) in a sealed manner particularly from a wet area into a dry area in a motor vehicle, comprising an insertion part (3), and a molded part (6A,B) arranged in said insertion part and provided for separating the individual cables (8) into several planes (E1, E2, E3). The molded part (6A,B) makes possible a simplified sealing of the individual cables (8) with a sealing compound (12). In particular, the molded part (6A,B) forms counter supports (20) in the end areas of said molded part. Said counter supports protrude in the longitudinal direction and work together with a mold (22) during the sealing.

Description

a s a ction s e c o m e s -

description

Cable feedthrough element and method for forming a cable feedthrough element

The invention relates to a cable feedthrough element for the sealed passage of a plurality of individual cables through an opening, in particular from a wet area to a dry area in a motor vehicle. The invention further relates to a method for producing such a cable feedthrough element.

Such cable feedthrough elements for the sealed passage of cables through a wall separating two spaces are used, in particular in the motor vehicle sector, for example when cables are being carried from the engine compartment into the interior. Such cable feedthrough elements partially have an outer, rigid bushing. Through this, the individual cables are guided and sealed to the bushing through a sealing compound. The grommet itself is finally inserted into the opening in the wall and sealed to the opening edge, for example by means of a spout. The cable feedthrough element with the individual cables enclosed therein by the sealant is usually provided as a prefabricated unit. The cable feedthrough element with the sealed individual cables inserted therein is therefore often an independent section of a motor vehicle electrical system, at the ends of the cable, for example, plugs are already prefabricated, via which then individual components can be easily connected during installation.

In special applications, it is provided that the individual cables are guided in planes to each other through the grommet. That is, a first number of cables is arranged side by side in a first plane and a further number of individual cables is arranged parallel to this first plane in a second plane. atentanwälte ι ergau o, ürn erg ei e

In such a cable feedthrough element, the manufacture of the prefabricated unit is complicated with the sealing of the individual cables within the grommet.

The invention is therefore based on the object to enable a cost-effective and simple production of a cable feedthrough element.

The object is achieved according to the invention by a cable feed-through element having the features of claim 1. The cable feed-through element is designed for the sealed passage of a plurality of individual cables, which are provided for arrangement in two or more planes. For this purpose, the cable feedthrough element has an insert part and a molded part arranged therein. The molded part extends in the longitudinal direction of the insert part and is provided for separating the planes from each other. The insert serves for insertion into the wall opening, through which the individual cables are to be guided.

The molded part therefore virtually forms a separating part for the two cable planes, so that they are guided in a simple manner before casting with the sealing compound. The individual cables are therefore brought over the molding in its desired position and held therein. Overall, therefore, a simplified manufacture, in particular casting or encapsulation with the sealing compound is made possible by the molded part, without the risk that the individual cables escape from their desired position during potting.

The cable feedthrough element is in particular part of a cable set, in particular for a motor vehicle. In the cable set, several individual cables are usually combined to form a common cable strand and, for example, surrounded by a common casing, such as a foam casing or bandage. The individual cables of the cable harness are individually guided sealingly through the insert. The entire cable set is used during installation with the insert in the wall opening.

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According to an expedient development, the molded part projects over the insert part in the longitudinal direction. After casting with the sealant, this is particularly evident from the fact that the molded part protrudes from the sealant. This longitudinally protruding portion serves inter alia better guidance of the individual cables in the axial direction. Preferably, the projecting portion of the molding is formed as an abutment for a mold during filling with the sealant. In addition to the separation of the individual cables in two levels, therefore, the molding also serves in particular for sealing the individual cables in the casting or injection process during filling of the sealant. The molded part therefore has a double function and, during the casting process, forms a part of the molding tool. During manufacture, the procedure is in particular such that an upper part of the molding tool is pressed from above against the molded part and a lower part of the molding tool against the underside of the molded part, including the individual cables lying between them. The molding thus also forms a separation point or parting plane of the mold at the same time. In this way, no separate fixation with other tools is required. Rather, during the casting process, an automatic fixation of the single cable is achieved in its desired position by being clamped between the molding and the upper and lower parts of the mold in its desired position. Overall, this allows a simplified positioning and a very simple forming of the cable feedthrough element.

In order to bring and hold the individual cables in a defined desired position, the molding in a preferred embodiment on its top and on its underside receptacles for a single-wise guiding the individual cable. The molding thus has on its top and bottom a special contour. The isolated guiding of the single cable ensures a secure sealing with the sealant.

In order to enable a simple prefabrication, the recordings are expediently designed for clamping the individual cables. The receptacles are therefore adapted in particular to the usually circular cross-section of the individual cables and have a cross-sectional view.

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For example, a U or a C-shaped contour. In the case of the C-shaped contour, the individual cables are preferably encompassed in a form-fitting manner.

Conveniently, the molded part comprises two opposite and connected by a web molding parts for the separation of the planes on the input and output side of the insert part. The molded part therefore has only on its two edge sides, in particular provided with the recordings shaped sections, so that a defined and secure guiding of the individual cable is ensured both input and output side. In the middle region, the two molded parts are connected to each other only by at least one connecting web.

According to a preferred embodiment, a plurality of molded parts are provided one above the other for arrangement. As a result, more than two, in particular three, levels of individual cables are thus made possible. Preferably, the individual molded parts are connectable to each other, so that they are fixed to each other. Conveniently, this is done by a latching connection. In principle, a screw connection, etc. is possible.

In order to enable a simple production of the molded parts arranged in several planes, it is provided in an expedient embodiment that the several molded parts are connected to one another and form quasi an overall shaped part. The individual, interconnected moldings are mutually movable, in particular pivotally mounted, so that they can be easily arranged by folding over each other. Preferably, the individual moldings are arranged together, for example by film hinges.

The cable feedthrough element is generally preferably designed as a prefabricated and prefabricated assembly unit. The individual cables, in particular a common cable set, are therefore individually guided through the insert part, are separated from the molding in at least two levels and are embedded in the sealant. In this case, the molding is also preferred in

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embedded in the sealant. The sealant surrounds the individual cables and the molded part over the entire length of the insert part, so that this preferably forms a solid body without open spaces.

The insert part, in which the molded part rests together with the individual cables, is preferably formed directly by the sealant itself. During manufacture, therefore, only the molded part is encapsulated with the cables inserted therein. The outer contour of the insert part is chosen such that it can be inserted into the wall opening and optionally attached to this.

In an alternative advantageous embodiment, the insert further comprises an outer, usually substantially cylindrical bushing in addition to the sealant. This consists for example of a stiff and hard plastic. In this embodiment, therefore, first the molded part is inserted into the grommet together with the individual cables and then the free space inside is filled in the grommet with the sealant. Conveniently, it is provided that the sealing compound engages around an outer edge of the grommet, so that an axial securing between the grommet and the sealant is formed.

Preferably, the molding has a smaller width than the inner diameter of the grommet, so that therefore a gap between the molding and the grommet is formed, in which the sealant can penetrate.

In both embodiments, the insert expediently has a particular circumferential flange, with which the insert abuts during assembly at an opening edge of the wall opening and in particular, for example via a screw or clamp connection with the wall is in particular sealingly connected.

The object is further achieved by a method for producing such a cable feedthrough element having the features of claim 14

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With regard to the cable bushing element mentioned advantages and preferred embodiments are to be transferred analogously to the process.

An embodiment of the invention will be explained in more detail below with reference to the drawing. In each case, in schematic and simplified representations:

1 is a simplified perspective view of a cable feedthrough element,

2 shows a kind of exploded view of the cable feedthrough element according to FIG. 1 without the individual cables, FIG.

3 shows a schematic sectional view through the cable feedthrough element according to FIG. 1 together with a shaping tool shown in dashed lines, FIG.

Fig. 4 is a perspective view of a plurality of moldings having overall molding, as well as

Fig. 5 is a perspective view of the top of two

Molding pieces.

In the figures, like-acting parts are provided with the same reference numerals.

In the exemplary embodiment according to FIGS. 1 to 3, the cable guide element 2 comprises an insert part 3, through which individual cables 8 are guided individually in planes E1, E2, E3. The insert part 3 is provided for sealed insertion into a wall opening. The insert 3 has in the exemplary embodiment, a prefabricated grommet 4 made of a rigid material, in particular plastic, in the two mold parts 6A, B also einliegen from a solid, inherently rigid plastic. Through the bushing 4, the individual cables 8 are passed, which are arranged over the two mold part 6 in a total of three levels E1.E2.E3. The single cable 8 are here in shots 10 of the mold parts 6 individually guided. In the receptacles 10, the individual cables 8 are preferably clamped, so frictionally and / or positively, inserted, for example

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pressed or clipped. In the final assembled state, the individual cables 8 and the sub-region of the molded parts 6A, B in the grommet 4 are surrounded by a sealing compound 12. The entire interior of the grommet 4 is thereby sealed.

Overall, the cable feed-through element 2 is essentially approximately cylindrical, wherein it has a contouring on its outer casing. In addition, approximately in the middle of the cable feedthrough element 2 and thus the grommet 4, a flange 14 is formed, which has a through hole. With the aid of the flange 14, the cable feedthrough element 2 can be fastened, for example, to the opening edge of a wall opening into which the cable feedthrough element 2 is inserted. The sealing to the opening edge takes place, for example, via the annular flange, which is pressed against the edge of the opening. For sealing generally suitable sealing means, such as sealing rings or possibly also spouts can be provided.

As is apparent in particular from FIG. 3, the sealing compound 12 engages in the cured state, the two outer edge sides of the grommet 4 and forms with annular grooves on the outer surface of the grommet 4 a rear grip. Characterized the bushing 4 is fixed in both the axial and in the radial direction by the sealant 12.

2, the two individual cable planes E1, E2, E3 separating mold parts 6A, B are each divided into shaped sections 16, which are respectively arranged on the input and output side and spaced from each other. In the embodiment, the two mold sections 16 of the lower mold part 6A are interconnected by webs 18, whereas the two mold sections 16 of the upper mold part 6B are not connected to each other. Due to the division into two separate mold sections 16 when pouring the sealant 12 penetrates into intermediate areas between the respective mold sections 16 a. At the same time, the sealing compound 12 surrounds each of the individual cables 8 individually. Overall, this sets the position of the individual elements of the cable feedthrough element 2 over the sealant 12.

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The individual cables 8 are fixed immovably relative to the molded parts 16. Also, the molded parts 16 can not be moved in the axial direction due to the sealant 12. Overall, by casting or injecting the sealant 12, an existing from the sealant 12 sealing element, as illustrated in the exploded view of FIG. 2. It should be noted, however, that this sealing element only forms during casting and as an independent component is not present and in particular can not be removed without destruction.

As can be seen in particular from FIGS. 1 and 3, the molded parts 6A, B are in the longitudinal direction over the end wall of the cured sealant 12 and thus the grommet 4 over. The protruding portion is used in the manufacturing process as an abutment 20 for a mold 22, which is shown schematically and greatly simplified in Fig. 3 by dashed lines. The molding tool 22 has an upper part 22A and a lower part 22B, so it is separated along a separation plane. The upper part 22A rests on the abutment 16 formed by the upper mold part 6B, and the lower part 22B is pressed against the abutment 16 formed by the lower mold part 6A. At the same time, in the region of the individual cables 8, the walls of the upper part 22A and of the lower part 22B are half-shell-like, so that the individual cables 8 are clamped between the upper part 22A or lower part 22B of the molding tool 22 and the respective receptacles 10 of the molded parts 6A.6B.

To produce the cable feedthrough element 2, the procedure is as follows:

In the first step, the individual cables 8 are first inserted into the receptacles 10 of the molded parts 6A, B provided for this purpose. Subsequently, the equipped with the individual cables 8 molded parts 6 A, B are inserted through the grommet 4 therethrough. This so created assembly is then inserted into the mold 22. The protruding abutment 20 are used as it were part of the mold 22. The individual cables 8 of the planes E1, E3 are clamped between the mold 22 and the abutments 20. Overall, this automatically the position of the molding 6 and with it the single cable. 8

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fixed in the planes E1, E2, E3 without the aid of further positioning aids. In addition, the individual cables 8 are sealingly enclosed by the molding 6 and the mold 22, so that no sealing compound 12 emerges during casting. At the same time, the grommet 4 is held by a matched to the outer contour of the grommet 4 shaping of the mold 22 in a defined position relative to the molded part 6. Overall, therefore, a defined position of the individual parts is determined by the mold 22 in a simple manner to each other, before then the sealant 12 is introduced into the free space in the mold 22. This is preferably a casting compound. Alternatively, a foam mass may be provided.

After curing of the sealant 12, the now completed cable feedthrough element 2 is removed from the mold 22 with the single cables 8 cast therein. The finished component is shown in Fig. 1 in a side view.

In the exemplary embodiment, two layers of molded parts 6A, B are provided, so that a total of three planes E1, E2, E3 are formed on individual cables 8. However, the structure described here and the method described here are also suitable for the training example of only two levels E1.E2 or even more than three levels. It only takes a corresponding number of mold parts 6A, B to be stacked.

Furthermore, the embodiment has been described in connection with a bushing 4, which is designed as a prefabricated independent unit. Notwithstanding this is dispensed with in a useful alternative to this independent structural unit of the grommet 4 and the sealant 12 forms even the complete outer contour of the cable feedthrough element, for example, with the flange 14. The then formed by the sealant 12 sealing element would thus have approximately a shape that is composed of the sealing element shown in FIG. 2 and the bushing 4 shown there.

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The structure of the molded parts 6A, B will be explained in more detail with reference to FIGS. 2, 4 and 5.

The lower mold part 6A forms a kind of basic mold part to which the two mold sections 16 of the upper mold part 6B are fastened. The attachment is in this case in particular by positive locking elements, so that the relative position of the individual molded parts 16 are fixed relative to each other. These positive locking elements are formed in the embodiment as locking elements 24.

As can be seen in particular from FIGS. 2 and 5, the molded parts 6A, B on their side facing away from the respective other molded part 6B, A facing upper or lower side respectively clamping segments 26, which serve for the positive fixing of the single cable 8. The clamping segments 26 are formed in cross section in the manner of a partial arc. Each receptacle 10 are in this case assigned longitudinally staggered clamping segments 26.

According to the embodiment of Fig. 4, the two mold parts 6A ₁ B are interconnected, via film hinges 28. The two mold parts 6A, B therefore form a common overall molding, which is injected or molded, for example, in a one-step manufacturing process. The two mold sections 16 of the upper mold part 6B only need to be folded upwards in order to clamp the individual cables 8. Alternatively, the film hinges 28 can also be separated, so that the two mold sections 22 of the upper mold part 6 B are present as separate, separate mold sections 16, as shown in Fig. 5.

The cable feed-through element 2 described here is distinguished by its simple production and the reliable and reliable individual guidance of the individual cables 8 in different planes E1.E2.E3. The cable feedthrough element 2 is used in particular for carrying out the individual cables 8 through a wall opening between two spaces, in particular between a wet and a dry space of a motor vehicle. For example, the cable diameter

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Guide element 2 used in a partition between an engine compartment and the interior of a motor vehicle.

Under single cable 8 are here generally supply lines, in particular electrical conductors, but also understood optical or other supply lines, via which a supply of components. These are single conductors, for example an insulated conductor wire or an insulated stranded wire. In principle, there is also the possibility that the individual cables 8 are multicore cables. The individual cables are preferably part of a common cable set and surrounded by a common sheath. At the ends of the individual cables further contact elements such as plugs are preferably at least partially already formed. Furthermore, the lengths of the individual cables are preferably already adapted to the required installation length. Overall, therefore, the cable feedthrough element described here is part of a prefabricated cable set, in particular for a motor vehicle.

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LIST OF REFERENCE NUMBERS

2 cable feedthrough element

3 insert part

4 bushing

6A.B molded part

8 single cables

10 recording

12 sealant

14 flange

16 molded part

18 footbridge

20 counter bearings

22 mold

22A top

22B lower part

24 locking element

26 clamping segment

28 movie hinge

E1, E2, E3 levels

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Claims

a w ithout o er, ergo P081022P-8/13/3717. September 2009 claims

1. Cable bushing element (2) for sealingly passing a plurality of individual cables (8) through an opening, in particular from a wet area into a dry area in a motor vehicle, wherein the individual cables (8) are provided for arrangement in a plurality of planes (E1.E2, E3) comprising an insert part (3) for insertion into the opening and a molded part (6A, B) arranged in the insert part (3) extending in a longitudinal direction of the insert part (3) and for separating the planes (E1, E2, E3) is provided.

Second cable feedthrough element (2) according to claim 1, wherein the molded part (6 A, B) in the longitudinal direction beyond the insert part (3).

3. Cable feedthrough element (2) according to claim 2, wherein the protruding part as an abutment (20) for a molding tool (22) for surrounding the individual cable (8) with a sealing compound (12) is formed.

4. Cable bushing element (2) according to one of the preceding claims, wherein the molded part (6A ₁ B) on its upper side and on its underside receptacles (10) for a single-wise guiding the single cable (8).

5. Cable feedthrough element (2) according to claim 4, wherein the receptacles (10) for clamping receiving the individual cable (8) are formed.

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6. Cable feedthrough element (2) according to any one of the preceding claims, wherein the molded part (6A ₁ B) two opposite and over a

Web (18) interconnected mold sections (16) for separating the planes (E1, E2, E3) on the input and output side of the insert part (3).

7. Cable bushing element (2) according to any one of the preceding claims, wherein for forming at least three levels (E1.E2.E3) of individual cables (8) a plurality of mold parts (6A ₁ B) are provided for arrangement one above the other.

8. Cable bushing element (2) according to claim 7, wherein the molded parts (6A, B) can be locked together.

9. cable feed-through element (2) according to claim 7 or 8, wherein an overall molded part is provided, which has a plurality of interconnected and collapsible molded parts (6A ₁ B).

10. Cable feedthrough element (2) according to one of the preceding claims, which is designed as a prefabricated mounting unit, in which a plurality of individual cables (8) separated by the molded part (6A ₇ B) in several levels (E1, E2, E3) arranged individually and are embedded together with the molding in a sealant (22).

11. Cable bushing element (2) according to claim 10, wherein the insert part (3) by the sealing compound (12) is formed.

12. Cable bushing element (2) according to claim 10, wherein the insert part (3) has a bushing (4), in which the molded part (6A ₁ B) is embedded together with the individual cables (8) in the sealing compound (12).

13. Cable bushing element (2) according to claim 12, wherein the molded part (6A ₁ B) has a smaller width than the inner diameter of the grommet (4).

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14. A method for producing a cable feedthrough element (2) according to any one of claims 10 to 13, wherein a plurality of individual cables (8) through the molding (6A, B) in at least two planes (E1, E2, E3) separated and with a sealant ( 12) are surrounded.

15. The method of claim 14, wherein the shaped part (6A ₁ B) loaded with the individual cables (8) in a shaping tool and then the sealant (12) is introduced, wherein an end portion of the molded part (6A ₁ B) as a counter-bearing (20 ) is used for a forming tool (22).

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