DE9001190U1 - Longitudinally watertight hose line - Google Patents

Description

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Richard Hirschmann GmbH & Co. 02.02.1990

Richard-Hirschmann-Str. 19 TPA/Stad/ka

7300 Esslingen a.N.

Utility model application Longitudinally watertight hose line

The innovation relates to a hose line intended for connection to a cable connector according to the preamble of claim 1.

Such a hose line is known, for example, from DE 37 05 968 C1. ^In order ^to avoid having to refill the insulating hose with casting compound at any point until it has solidified, the insulating hose is compressed in a device at a certain distance from its third end and a quick-curing sealing compound (e.g. polyurethane foam or silicone) and then the actual casting compound (e.g. casting resin) are introduced into the free end section. This means that a smaller and precisely metered amount of casting compound is required. However, the production effort is high due to the device required for this and the different sealing materials to be filled in, and the production time is relatively long due to the additional solidification time of the sealing compound, which makes series production of mass products, which is what we are talking about here, significantly more expensive.

It is also known to use a rubber-like mass (e.g. permanently elastic sealing putty based on synthetic rubber) to stop the casting compound being poured in around the cable cores before the insulation hose is finally in place at a certain distance from the free end of the cable cores, or to wrap an insulating tape over which the insulation hose is then pulled forward until the required free end zone for the casting compound is formed. With these measures, it is not guaranteed that the sealing putty or the insulating tape really fills the entire cross-section of the insulation hose, so that the casting compound can also pass through. In addition, these two methods are cumbersome and time-consuming and therefore not suitable for the Se-

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■1 suitable for mass production. In some casting compounds, the

f ^! casting temperature so high that the sealing putty deforms and thus

is unusable for the stated purpose.

ti In all known methods described, it also depends on chance

% in their mutual position between the individual conductors according to the

«;,-. Casting agent; protrudes from the insulating tube. For connection to the corresponding

% associated plug contacts, they are therefore generally not suitable for use.

&iacgr; ordered, whereby - especially with a larger number of lines -

wires - a confusing tangle of wires is created, different cable wire lengths are required and there is an increased, usually non-existent, space requirement.

The innovation is therefore based on the task of developing a longitudinally watertight hose line according to the preamble of claim 1 in such a way that a secure seal is achieved in series production with little effort and a precisely metered small amount of casting compound and that the cable wires are assigned in their position to the associated plug contacts after casting in the sense of short connections with as few crossings as possible.

This problem is solved by the characterizing features of claim 1.

The insert almost completely fills the insulating hose when the cable wires are inserted into the grooves due to its cylindrical shape and thus represents an ideal stopper for the casting compound to be filled in, which is easy to set up and can be positioned at the desired point in the hose line. This position is guaranteed even without other measures - such as compressing the insulating hose - due to the cable wires running closer to the axis on the cable side and, above all, their easy clamping in the grooves. This stopper, which tightly fills the insulating hose, means that a relatively small and precisely metered amount of casting compound is sufficient to seal the hose line. In addition, the cable wires can be easily assigned to the relevant plug contacts of the cable connector in the correct position by inserting them into the grooves accordingly, so that the cables can be easily connected to the plug contacts.

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ReI 7,.&Pgr;. from the ventilation plug connectors known from DF 37 26 615 Cl with a line surrounded by molded housing half-shells, a rigid counter surface must be present to absorb the spray pressure. When using a hose line, this counter surface is formed by the casting material, which, however, does not always have the necessary cylindrical outer surface, which is necessary for the sealing hose to fit tightly against the inner surfaces of the half-shells. Due to its special design, the insert according to the invention can fulfill this additional function in an optimal manner.

Overall, the multifunctional use ensures the longitudinal watertightness of the hose line, a quick and uncomplicated cable connection, and at the same time advantageous usability for cable connectors with half shells that rest on the insulating hose under pressure in an extremely simple and cost-effective manner that is particularly suitable for mass production.

Advantageous embodiments of the insert arranged in the hose line according to the invention are specified in the subclaims. For example, if the grooves are designed according to claim 2, the cable wires can be clipped into the grooves. A suitable length and the selected material of the insert already provide a comprehensive clamping

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nt &agr;&Lgr;&iacgr;&agr;&igr;&ugr;&igr; m^itiung ciiciv-iii/. un; nami uvi-n uau uiv.it ci iivtit nciucit, v*t»j^ the contour of the holding area of the grooves is also slightly smaller in diameter than the outer diameter of the cable cores.

This provides the advantage, without any additional effort, that neither when moving the insulating hose over the insert nor when later filling in the casting compound, the insert will definitely not slip out of its desired position at a specified distance from the insulating hose and cable wire end.

The gap remaining between the cable cores and the sealing hose is filled with sealing compound over a length that depends essentially on its viscosity. This ensures that the position of the insert and its cylindrical shape are guaranteed; above all, however, a high level of tightness is already achieved at this point, so that a relatively short filling of sealing compound on the plug side is sufficient to achieve absolute longitudinal watertightness. This also saves costs and only requires a small amount of sealing material, and the length of the rigid section of the hose is also advantageously short.

In principle, the insert can be made from a variety of materials - provided that they can withstand the melting temperature of the casting compound without deformation. The insert according to claim 3 can be manufactured from plastic in a particularly simple and cost-effective manner (e.g. using the injection molding process), with a wide range of materials being available for optimum adhesion.

The distribution of the grooves running in the longitudinal direction of the insert on the circumference can be uniform in the ring area. However, it is advantageous, according to claim 4, to adapt the mutual position (angular position) of the grooves to the position of the power contacts in order to make assembly as simple as possible.

The invention is explained in more detail below with reference to the figures. They show

Flg. la, Ib a broken side view and a front view of a hose line according to the invention and

Fig. 2 is a partially sectioned side view of an angle connector with a connected hose line according to the invention.

The hose line 1 consists of an insulating hose 2 and five insulated cable wires 3 arranged loosely therein. A cylindrical insert 4 made of plastic is inserted into its plug-side end area, the outer diameter of which is the same as the inner diameter of the insulating hose 2 and which has five axially extending grooves 5 evenly distributed around the circumference, each with an outer insertion area 6 and an inner holding area 7. The width of the insertion areas 6 is slightly smaller than the outer diameter of the cable wires 3, the holding areas 7 are adapted in their contour to the cross-section of the cable wires 3.

The five-wire angle connector 8 has a cover part 9 and a base part 10, each of which consists of a line-side section and a plug-side section. The plug-side section of the base part 10 has five plug contacts 12 in a transverse wall 11, to whose solder connection part 13 the stripped end 14 of a line wire 3 is connected. The line-side sections of the cover part 9 and base part 10 are designed as half-shells, which form the end region containing the insert 4.

the hose line 1 and, in the assembled state, are pressed firmly against the insulating hose 2 with their inner surfaces by an overmold 16.

When producing the prefabricated angle connector 8, the cable wires 3 are first deflected to the required size, stripped at the free end and clipped into the grooves 5 of the insert 4 at a distance from it corresponding to the connector dimensions, with each cable wire 3 being assigned to a specific groove 6 in such a way that a crossing-free, space-saving continuation to the plug contacts 12 is provided. The holding areas " are advantageously dimensioned so that the cable wires 3 can still be easily inserted and, on the other hand, a slight clamping effect is achieved. The insulating hose 2 is then pushed over the insert 4 so far that it protrudes approx. 6-10 mm beyond it on the plug side. The webs 16 of the insert 4 located between the grooves 6 rest with their outer surfaces 17 on the inner wall of the insulating hose. A filling 19 made of casting compound is introduced into the hose opening 18 formed by the protruding insulating hose end with the hose line 1 held approximately vertically, which, by selecting its viscosity accordingly, also penetrates a little into the gaps remaining in the insertion areas 6 of the grooves G between the cable wires 3 and the inner surface of the insulating hose 2. After the casting compound has hardened, the hose line 1 is successively pushed into the base part 10 of the angle connector 8. inserted, the stripped end of each cable wire 3 is soldered to the soldering connection part 13 of the associated plug contact 12 and the cover part 9 is placed on top. The half-shell-shaped sections lie closely against the insulating tube 2 along the filling 19 and the insert 4. In this state, the overmolding 16 is now applied, which holds the cover part 9 and the base part 10 together in a watertight manner, also penetrating recesses 20 of the half-shell-shaped sections and, by welding to the insulating tube 2, creates a highly effective seal against the ingress of

: Water forms between insulating tube 2 and half shells.

The longitudinal watertightness of the hose line 1 is ensured by the filling 19

&igr; with casting compound. This can be precisely dosed and relatively thin thanks to the insert 4 that serves as a stopper. In addition,

: through the grooves 5 of the insert 4, a simple additional suction

• enables the individual cable wires 3 to be routed and assigned to the corresponding plug contacts 12.

Furthermore, the insert 4 forms a solid cylindrical counter surface through the outer surfaces 17 of the webs 16 together with the casting compound penetrating into the gap between the cable cores 3 and the inner surface of the insulating hose 2, which absorbs the pressure of the half shells and above all of the overmolding 15 penetrating the recesses 20, and through the clean fit thus achieved over the entire circumference also enables the high sealing effect on the outer surface of the insulating hose 2.

The hose line 1 described thus achieves, in a particularly simple and cost-effective manner, absolute longitudinal watertightness of both the hose line 1 inside and its insertion area in the angle connector 8, as well as a quick, unmistakable and therefore secure connection of the cable wires 3, whereby these advantages are particularly evident in multi-core hose lines and mass production.

Claims (4)

- 7 -Protection claims 1. Longitudinally watertight, in particular multi-core hose cable for connection to a cable connector with the corresponding number of poles, in which a filling of casting compound is provided between the insulated cable cores and the insulating hose loosely covering them in order to achieve longitudinal watertightness, characterized in that on the line side, in connection with the filling (19), a cylindrical insert (4) is arranged in the hose line (1), the outer diameter of which is equal to the inner diameter of the insulating hose (2) or slightly larger, and which has grooves (5) running in the axial direction and distributed around the circumference for receiving the line wires (3). 2. Hose line according to claim 1, characterized in that the grooves (5) have a short introduction area (6), the clear width of which is at least partially slightly smaller than the outer diameter of the cable wires (3) and the adjoining holding area (7) is adapted in its contour to the cross section of the cable wires (3) or is slightly smaller in its diameter. 3. Hose line according to claim 1 or 2, characterized in that the insert (4) is a plastic part. 4. Hose line according to one of claims 1 to 3, characterized in that the arrangement of the grooves (5) on the circumference of the insert (4) is adapted to the position of the associated plug contacts (12) of the line connector (8).