WO2006077225A1

WO2006077225A1 - Connecting device for media pipes

Info

Publication number: WO2006077225A1
Application number: PCT/EP2006/050284
Authority: WO
Inventors: Harald Hagen; Andreas Suhr; Frank Zenses
Original assignee: Voss Automotive Gmbh
Priority date: 2005-01-18
Filing date: 2006-01-18
Publication date: 2006-07-27
Also published as: DE112006000173A5; DE202005000752U1

Abstract

The invention relates to a connecting device (1) for media pipes (18), comprising an insertion cartridge (2) and a receiving part (8). The insertion cartridge (2) can be inserted into a connecting hole (6) of the receiving part (8) by means of an insertion section (4). The connecting hole (6) of the receiving part (8) is embodied in a slightly conical manner in the direction of the outer outlet side (22), the connecting hole (6) preferably expanding at a cone angle (a) approximately ranging from 1° to 6°, especially about 4.5°. The outer circumference of the insertion section (4) of the insertion cartridge (2) is provided with barb-type holding elements (20) which are to dig into the connecting hole (6) of the receiving part (8) in a positive or non-positive and thus unremovable manner in normal operating conditions.

Description

Voss Automotive GmbH, Leiersmühle 2-6, 51688 Wi pperfürth

"Connection device for media lines"

The present invention relates to a connecting device for media lines (Rohroder hose assemblies for pneumatic or hydraulic pressure and flow media), consisting of a particular trained as a Einpresspatrone insert part and a receiving part, wherein the insert part with a particular trained as Einpressabschnitt insertion into a connection opening of the receiving part by a easy plugging operation can be used or used.

WO 2004/029497 A1 discloses some embodiments of a press-fit cartridge (FIGS. 11 to 18 and claims 11 to 15) which can be inserted or pressed into a connecting opening of an assembly part. For holding within the connection opening, at least one radially projecting holding element or tooth element is provided on the outer circumference of the press-in section for positive or frictionally engaged engagement with the inner surface of the connection opening. Here, an embodiment of the holding elements is described, which allows a release by a herausschraubbewegung after insertion or pressing. In practice, it has been shown that the pressing requires a high force and therefore not manually, but only with a suitable pressing device is possible. In addition, the production of the components is associated with a high cost. For example, the connection opening of the unit part must be made by machining as a cylindrical bore. The known outer holding elements are embedded either as metal parts in some areas in the material of the existing injection-molded plastic cartridge or formed as projections of the existing metal Einpresspatrone.

The present invention has for its object to provide a connecting device of the type mentioned, which is characterized by improved manufacturing and performance characteristics. This is achieved by the features of claim 1 according to the invention. Advantageous embodiments of the invention are contained in the dependent claims.

Due to the inventive design, according to which the connection opening of the receiving part is slightly conically widened towards its outer mouth side, a simplified production of the receiving part is first made possible by this as a die-cast z. B. plastic, aluminum or the like can be formed. The slight conicity of the connection opening acts as Entformschräge and thereby makes a simple demolding with core pull possible. In addition, any machining post-processing of the connection opening is unnecessary. This has the additional advantage that the very smooth casting surface is maintained throughout, whereas machining of some materials would expose the underlying porous casting material. The smooth surface is advantageous for the pressing in and for the sealing of the press-in cartridge. The invention also achieves a reduction in the force to be applied for pressing, so that manual assembly is also possible. The press-in force achieved by the embodiment according to the invention is in any case less than 500 N, preferably even in the range of 150 N or less.

In a further advantageous embodiment of the invention, it is provided that the press-in portion of the Einpresspatrone on its outer circumference distributed over the circumference arranged holding elements, the components of a metallic, annular and preferably at a circumferential location an axially and radially continuous interruption holding member are. This seated in an annular groove of Einpressabschnittes holding part is thus prefabricated as a separate item and mounted by simply placing on the press-fit of Einpresspatrone. For this purpose, the holding part is designed as a substantially cylindrical (or because of the circumferential interruption "partially cylindrical") sheet metal part, wherein the holding elements are designed as cut and obliquely outwardly bent retaining tongues. In this case, the holding part can advantageously be rolled out of a wire material such that its marginal edges have natural rounding radii. This measure also contributes to economic production, namely by saving an additional deburring process (eg so-called trovalizing). The Einpresspatrone is advantageously formed on its side opposite the press-fit portion as a coupling part of a plug-in connector for releasably connecting a media line, preferably as a sleeve part with a plug opening for receiving a Einsteckabschnittes connected to the media line or connectable plug part. In this case, a holding device is provided for releasably locking the plug-in section in its inserted into the plug-in opening and circumferentially sealed by a seal state. The configuration of the plug-in coupling and the associated holding device is basically arbitrary. Hereinafter, some preferred embodiments thereof will be explained. In all cases, the Einpresspatrone forms a kind of adapter to allow a connector connection to any receiving part (any connection part, for example, also aggregate, such as valve housing, pressure accumulator / generator or the like), which only needs to have the connection opening according to the invention.

The invention will be explained in more detail below with reference to the drawings and preferred embodiments illustrated therein. Showing:

Fig. 1 shows a first embodiment of an inventive

Connecting device in axial section with an additional plug part in a first plug position (so-called. Vorraststeilung),

Fig. 2 shows the embodiment of FIG. 1 in an angular offset

Axial section plane and in a second plug-in position of the plug part (so-called full latching position),

Fig. 3 shows another, again angularly offset axial section of

Connecting device according to FIGS. 1 and 2, but without plug part,

Fig. 4 shows an axial section only of the Einpatrpatrone the execution according to

1 to 3 with closed Dreharretierung,

5 shows a further, angular offset axial section of Einpresspatrone of FIG. 4 with an open Dreharretierung, 6 and 7 are perspective views of individual parts of a two-part Einpresspatronen-housing of the embodiment of FIGS. 1 to 5,

8 and 9 corresponding sectional views to Fig. 6 and 7,

10 is an axial section of the receiving part with the connection opening in a first embodiment,

11 is an axial section similar to FIG. 10 in a second embodiment,

12 shows a detail enlargement of the area XII in FIG. 11, FIG.

13 shows a detail enlargement of the region XIII in FIG. 11 in an alternative embodiment to FIG. 12, FIG.

14 is a perspective view of a holding part of Einpresspatrone,

15 is an enlarged side view of the holding part of FIG. 14,

16 shows a section of the holding part in the plane A-A according to FIG. 15, FIG.

17 is a section in the plane B-B of FIG. 15,

18 is a section in the plane C-C of FIG. 15,

19 is an enlargement of the detail E in Fig. 17,

FIG. 20 shows an enlargement of the detail F in FIG. 15, FIG.

21 is an enlargement of the detail G in Fig. 18,

22 is an enlarged step in the plane HH of FIG. 16, Fig. 23 is a greatly enlarged section of a section in the plane

A-A according to FIG. 15 (but with opposite viewing direction) in the region of a holding element of the holding part,

Fig. 24 shows another embodiment of an inventive

Connecting device in an axial section similar to FIG. 1 without plug part,

FIG. 25 shows the connection device according to FIG. 24 with an inserted insertion section formed by one end of a media line, FIG.

Fig. 26 shows another embodiment of the invention

Connecting device with a plugged plug part and

FIG. 27 shows an enlarged view of only the press-fit cartridge of the embodiment according to FIG. 26.

A connection device 1 according to the invention consists of a press-in cartridge 2 which can be inserted (pressed in) with a press-in section 4 into a connection opening 6 of a receiving part 8. The receiving part 8 may be any connecting or connecting part, for example, a device or aggregate, such as a valve housing, a pressure generator or pressure accumulator or the like.

The Einpresspatrone 2 is preferably designed as a coupling part of a plug-in coupling for releasably connecting a media line, in particular as a socket part with a plug-in opening 10 for receiving a Einsteckabschnittes 12 of a plug part 14, wherein the plug part 14 in turn connected to or connected to a media line. Thus, the Einpresspatrone 2 forms an adapter over which a media line to the respective, only the connection opening 6 having receiving part 8 is releasably connected via a plug-in system.

The media line, not shown in Figures 1, 2 and 20, for example, on a connecting pin 16 of the connector part 14 can be plugged. In the so-called "thornless" embodiment according to FIGS. 18 and 19, the media line 18 itself forms the plug part 14 in that it can be plugged directly into the plug-in opening 10 with a line end forming the plug-in section 12. The Einpresspatrone 2 has on the outer circumference of its press-in portion 4 barb-like holding elements 20 for positive or kraftformschlüssigen - and thereby insoluble under normal operating conditions - claws in the connection opening 6 of the receiving part 8.

As is now apparent in particular from FIGS. 10 and 11, according to the invention the connecting opening 6 of the receiving part 8 is slightly conically widened towards its outer mouth side 22. Here, the term "slightly conical" means that the connection opening 6 expands with a cone angle α approximately in the range of 1 ° to 6 °. Preferably, the cone angle α is about 4.5 °.

In the embodiment according to FIG. 10, the connection opening 6 is continuously slightly tapered over its axial length. Connected to the conical connection opening 6 via a radially inwardly projecting step is an internally threaded portion. This embodiment of the receiving part thus forms a connection adapter with connection thread.

In the advantageous embodiment illustrated in FIG. 11, the slightly conical connection opening 6 in the effective region of the holding elements 20 of the press-fit section 4 of the press-fit cartridge 2 has an axially very short, cylindrically shaped holding surface section 24. As can be seen from the enlarged sections in FIGS. 12 and 13, the cylindrical retaining surface section 24 has a short axial length L which is approximately in the range of 0.5 mm to 4 mm, in particular 1.5 mm to 2.5 mm. The cylindrical holding surface portion 24 contributes to an effective locking of the holding elements 20. As can be seen from FIG. 13, in the correctly inserted state of the press-in section 4, the holding elements 20 come with outer holding edges 26 in the region of the cylindrical holding surface section 24 for engaging engagement between the holding edges 26 and the end 28 of the cylindrical side facing the mouth side 22 Holding surface portion 24 an axial distance x is present, which is at least 0.5 mm.

According to FIG. 12, the cylindrical holding surface section 24 may be formed by a radial depression or recess in the conical inner surface of the connection opening 6. Preferably, in this case, the holding surface portion 24 on the one hand goes to Mün 22 side with the same inner diameter, ie without a radial step, and on the other hand via a radial, the inner diameter abruptly reducing step surface 30 into the conical inner surface of the connection opening 6 via.

In the alternative illustrated in FIG. 13, the cylindrical holding surface section 24 merges into adjacent axial conical inner surface sections 6a and 6b of the connection opening 6 in both axial directions, each having the same inner diameter, that is to say without radial steps changing stepwise in diameter.

In a further advantageous embodiment of the invention, the holding elements 20 are formed as constituents of a metallic, annular holding part 32. This annular holding part 32 preferably has at one circumferential point an axially and radially continuous interruption 34 in order to be able to insert the annular holding part 32 into an annular groove 36 provided on the outer circumference of the press-in section 4 of the press-in cartridge 2. The holding part 32 with the interruption 34 can best be seen in the separate illustrations in FIGS. 14 to 23. Reference is made in particular to FIGS. 5, 7 and 9 to the annular groove 36 of the press-fit section 40.

According to Fig. 14 to 23, the holding part 32 is formed as a substantially cylindrical or because of the circumferential interruption 34 teilzylindrisches sheet metal part. In this case, the holding elements 20 are formed as cut-free and obliquely outwardly bent holding tongues 38, 38a, which have the holding edges 26 already mentioned above at their free ends. Here, a first type of retaining tabs 38 is provided which extend in the axial direction opposite to the insertion direction and obliquely radially outward. Preferably, as securing means against rotation of the press-in cartridge 2 within the connection opening 6 of the receiving part 8, at least one different retaining tongue 38a is provided, which extends in the circumferential direction and obliquely radially outward. Preferably, two such retaining tongues 38a are arranged approximately diametrically opposite one another, wherein these two retaining tongues 38a extend in opposite circumferential directions (cf., Fig. 16), in order to ensure a good security against rotation in both directions of rotation. As can be seen from FIG. 22, these holding tongues 38a can additionally be twisted about their longitudinal axis in such a way that they contribute with a holding edge corner region 26a simultaneously to the circumferential and also axial fastening of the press-in cartridge 2 in the connection opening 6. The retaining tongues 38a, as securing means acting radially outward, effectively secure the retaining part 32 against rotation in the Connection opening 6. In order to exclude a rotation of the Einpresspatrone 2 within the annular support member 32, as a radially inwardly acting securing means preferably within the annular groove 36 of the press-in section 4 a projection 39 is provided (see in particular Fig. 5, 7 and 9), wherein the Holding part 32 with its peripheral interruption 34 receives this approach 39 so that virtually a backlash-free connection is given in the circumferential direction. Thus, the holding member 32 acts overall advantageously as anti-rotation for the Einpresspatrone. 2

As an alternative to the described, preferred embodiment, the holding part 32 may also have retaining tongues of the type of holding tongues 38a for preventing rotation, but they are twisted or bent in such a way that they act both radially outward and radially inward. In this case, then possibly the approach 39 of the press-in section 4 is unnecessary. In addition, the holding part 32 can also be closed circumferentially, d. H. be formed without the interruption 34. For holding on the press-in section 4, the holding part 32 can have inwardly pointing retaining tongues, which engage in a groove and / or in the outer peripheral surface of the press-in section 4. Furthermore, the holding part 32 may also be multi-part, z. B. be formed of two half-shells, which are fixed by suitable means to the Einpresspatrone 2 and / or against each other, for. B. are locked.

In the interest of cost-effective production, it is advantageous if the holding part 32 is rolled from a originally circular, for example, in cross-section wire material to a flat cross-section or partially hollow cylindrical that its edges receive natural rounding radii. This eliminates the need for a separate deburring process, which would be useful if the holding part would be punched out of a flat sheet material and then bent. However, the holding tongues 38, 38a are punched out of the holding part 32 such that in the region of the holding edges 26 approximately radially outwardly directed, sharp-edged punching burrs are formed. This contributes to a very strong, positive locking in the connection opening 6. As is apparent from Fig. 23, 40 U-shaped, the contour of the retaining tongues 38, 38a surrounding pockets 42 are first punched out by a punching operation from the inside out in the direction of the arrows shown, whereby a corresponding U-shaped punching residue 44 is obtained, the is shown cut in Fig. 23. By means of this punching process, each holding tongue 38, 38a thus receives punching burrs directed outward. Only then to the punching process, the so freely punched holding tongues 38, 38a bent radially obliquely outward (arrow 46 in Fig. 23).

The support member 32 may in principle but also be produced as a stamped bent part of sheet metal. In this case, a deburring is optional, especially since any burrs are harmless by the preferred rotation, because by avoiding oscillating movements and damage to the Einpresspatrone 2 are avoided by punching burrs of the holding part 32. It is also possible to deburr the stamped and bent part prior to the radial bending out of the retaining tongues 38, 38a in such a way that only burrs are removed at outer marginal edges, but not in the region of the edges of the retaining tongues. In a Trovalisier process, this can be achieved by using correspondingly large stones (grinding wheels), which can not intervene in the areas of the punched pockets 42 by their size.

Preferably, the holding part 32 has a number of six to fifteen, as shown in particular twelve, holding elements 20 and holding tongues 38, 38a in a uniform, radially symmetrical circumferential distribution. Furthermore, the holding part 32 has a radial material thickness in the range of 0.2 mm to 0.6 mm, in particular 0.4 mm. The interruption 34 of the otherwise annular holding part 32 - and thus also the corresponding projection 39 in the annular groove 36 of the Einpresspatrone 2 - extends over an angle of 30 °, so that the holding part 32 has a Umgreifungswinkel> 330 °. In this case, the holding part 32 made of spring steel, preferably stainless steel, or of a beryllium compound, in particular beryllium bronze.

The holding tongues 38, 38a form such short lever arms that in all operating states their deflection is always less than the material thickness of the holding part 32.

To seal the Einpresspatrone 2 within the connection opening 6 of the press-in section 4 carries on its outer circumference at least one sealing ring 48 in an outer annular groove 50. It is advantageous if the sealing ring 48 - as shown - in a holding elements 20 and the holding part 32 with the Holding tongues 38, 38a in the insertion direction (see the arrow 52 z., In Fig. 4) upstream portion of the press-in section 4 is arranged. As a result, the cooperating with the sealing ring 48 sealing region of the connection opening 6 at the onset of Einpresspatrone not reached by the holding elements 20 and therefore remains advantageously free of scoring. This always ensures optimum sealing effect. In addition to the embodiment shown in FIG. 11, the connection opening 6 may have a short cylindrical sealing surface section (not shown) in the abutment region of the sealing ring 48 (in particular for tolerance compensation).

In the following, some peculiarities are explained, which relate to the plug-in principle for releasably connecting the media line or the connected thereto connector part 14 and a holding device 54, which is inserted for releasably locking the Einsteckabschnittes 12 in its plugged into the insertion opening 10 of the Einpresspatrone 2 and circumferentially about at least one seal 56 is provided sealed state.

In the embodiment illustrated in FIGS. 1 to 9, a radially elastic latching element 58 is mounted within the press-fit cartridge 2 for the form-locking locking engagement of a radial latching step 60 of the plug-in section 12. In order to enable a detachment of the plug part 14 from its latched plug-in state, in this embodiment the press-in cartridge 2 is formed in two parts from a sleeve-shaped outer part 62 and a coaxially seated in this sleeve-shaped inner part 64. The press-in cartridge 2 can be inserted non-detachably into the connection opening 6 of the receiving part 8 via the outer part 62 having the press-in section 4 with the holding elements 20, the inner part 64, however, being detachably connected to the outer part 62. The locking element 58 is in this case mounted between the inner part 64 and outer part 62 such that it can be removed by releasing the inner part 64 of the outer part 62 together with the latched plug-in portion 12 of the plug part 14. In the illustrated preferred embodiment, the outer part 62 and the inner part 64 are connected to each other in the manner of a bayonet connection. An annular gap formed between the inner part 64 and the outer part 62 is sealed to the outside via a seal 66. Both parts 62, 64 have radial, flange-like connecting sections 68, 70 in the region of the outlet side 22, wherein the connecting section 68 of the outer part 62 engages in the connecting section 70 of the inner part 64. In this area, the bayonet connection is formed, to which reference is made in particular to FIGS. 6 and 7. In this case, means for securing the inner part 64 against unintentional rotation relative to the outer part 62 are provided. For this purpose, at least one pin-like securing element 72 can be provided, which is releasably axially by corresponding openings of the two Connecting portions 68, 70 of the inner part 64 and the outer part 62 extends. Reference is made in particular to the illustrations in FIGS. 2 to 4 (inserted securing position) and FIGS. 5, 6 and 8 (release position). In the illustrated, preferred embodiment is a bow-shaped, U-shaped security part

74 provided that forms two parallel securing elements 72 with its two legs, which are connected via a connecting web 75. The connecting web 75 serves as a handle for insertion into the securing position as well as for releasing, by a suitable tool, for example. In a gap 77 formed between the end surface of the Einpresspatrone 2 and the resting connecting web 75 As a screwdriver blade, can be used to order the connecting web

75 with the securing elements 72 pull up. To form the gap 77, bevels may be formed in the abutment region of the connecting web 75 and / or end face of the press-in cartridge 2 (see FIGS. 2 and 4).

In a further advantageous embodiment of this embodiment, the latching element 58 is formed as a double-locking element with two axially spaced part detent elements 58a and 58b, that the insertion portion 12 on the one hand in a partially inserted Vorraststeilung (see Fig. 1) and on the other hand in a fully inserted and media sealed sealed full detent position (Fig 2) is lockable. According to FIG. 1, there is a defined limited, in particular acoustically perceptible, leakage in the pre-ratchet division in that axial leakage paths are formed in the region of the seal 56. For this purpose, distributed over the circumference radial recesses 76 may be formed within the insertion opening 10. If the plug part 14 additionally has a dirt seal 78 in the region of the mouth side 22, leakage paths are also formed here in the pre-ratchet division according to FIG. For this purpose, corresponding radial recesses 80 may be formed in the mouth region. Reference is also made to FIGS. 3 to 5.

The partial latching elements 58a, 58b are preferably formed as metallic, flat part-annular spring clips and held in an annular cage-like receiving part 82. The receiving part 82 is suitably made of plastic.

As far as the embodiment according to FIGS. 24 and 25 is concerned, it is a thornless plug-in system, wherein the media line 18 can be plugged directly into the plug-in opening 10 as an insertion section 12 with one end. In this case, within the Einpresspatrone 2 is a slotted and thus radially deformable clamping ring 84th mounted, which cooperates for locking the plug-in portion 12 formed by the end of the media line 18 with a provided within the insertion opening 10 inner cone 86 so that after insertion of the Einsteckabschnittes 12 by a pulling movement in the release direction of the clamping ring 84 positively entrained and moved into the inner cone 86 inside and is thereby narrowed radially. The clamping ring 84 then acts with at least one radially inwardly facing clamping edge 88 positively or at least positively locking against the smooth cylindrical peripheral surface of the Einsteckabschnittes 12. In order to allow here a subsequent loosening of the connector part 14 and the media line 18, the Einpresspatrone 2 is also in two parts formed from two detachable parts, namely from a press-fit portion 4 having the housing part 90 and a connected thereto via a snap and releasable positive connection 92 and the inner cone 86 having insert 94. Within the Einpresspatrone 2 can advantageously be an axially extending support sleeve 96 for non-positive engagement in the inserted insertion portion 12 may be arranged. As shown, the support sleeve 96 can be formed integrally with the housing part 90 or alternatively can be pressed in as a separate item, for example.

Further details on the embodiment of the plug-in system according to FIGS. 24 and 25 are contained in DE 195 10 193 A1 and the corresponding EP 0 733 844 B1 as well as in DE 202 14 847 U1 and the corresponding WO 2004 / 029497A1. These publications are therefore hereby incorporated by reference in their entirety.

Finally, as far as the embodiment according to FIGS. 26 and 27 is concerned, the press-in cartridge 2 has a radially outwardly projecting holding web 100 on a radially outwardly projecting holding web 100 with a lower, in the direction of the press-in section 4 facing radial holding edge 102 at a protruding outside the receiving part 8 , The sleeve-shaped portion 98 in this case forms the actual plug-in opening 10 into which the insertion portion 12 of the plug part 14 can be inserted. In this case, the plug part 14 outer latching spring arms 104 which extend axially in the insertion direction and at their free, lower ends radially inwardly facing locking lugs 106 for latching over and behind the retaining edge 102 of the Einpresspatrone 2. To release the male part 14, the detent spring arms 104 can be spread radially outwards until the locking lugs 106 release the retaining edge 102. In all embodiments, the press-in cartridge 2 - apart from the metallic holding part 32 - made of a suitable plastic, in particular of a fiber-reinforced polyamide. The plastic material should preferably be a fiber z. B. glass fiber content of at least 25%, for example, PA12 + GF30 or PA12 + GF50.

For many applications, it is essential that the connection device 1 prevents relative rotation of the connected media line. Therefore preferred (not visible in the drawings) means for securing the male part 14 against rotation relative to the - in turn via the holding member 32 rotatably relative to the receiving part 8 fixed - Einpresspatrone 2 is provided.

Furthermore, the Einpresspatrone 2 on the outside a stop element 108 such that it reaches the defined Einsetzbegrenzung of the press-in section 4 for support on the receiving part 8. In the case of the embodiment according to FIGS. 1 to 9, at least the connecting section 68 of the outer part 62, possibly also the connecting section 70 of the inner part 64, acts as a stop element.

The invention is not limited to the illustrated and described embodiments, but also includes all the same in the context of the invention embodiments. Furthermore, the invention has hitherto not been limited to the combination of features defined in claim 1, but may also be defined by any other combination of specific features of all the individual features disclosed overall. This means that in principle virtually every individual feature of claim 1 can be omitted or replaced by at least one individual feature disclosed elsewhere in the application. In this respect, the claim 1 is to be understood only as a first formulation attempt for an invention.

Claims

claims

1. connection device (1) for media lines (18), consisting of a particular insert part as a cartridge (2) formed insert part and a receiving part (8), said Einpatrone (2) with a particular as a press-fit (4) formed insertion into a port ( 6) of the receiving part (8) can be inserted, characterized in that the connection opening (6) of the receiving part (8) to its outer mouth side (22) is formed slightly conically widened.

2. Connecting device according to claim 1, characterized in that the connection opening (6) widens with a cone angle (α) approximately in the range of 1 ° to 6 °, in particular approximately 4.5 °.

3. Connecting device according to claim 1 or 2, characterized in that the press-in section (4) of the Einpresspatrone (2) on its outer circumference barb-like holding elements (20) for positive or kraftformschlüssigen and thereby under normal operating conditions insoluble claws in the connection opening (6) Receiving part (8).

4. Connection device according to claim 3, wherein the slightly conical connection opening has a cylindrically shaped holding surface section in the effective region of the holding elements of the inserted press-in section of the press-in cartridge.

5. Connecting device according to claim 4, characterized in that the cylindrical holding surface portion (24) has a short axial length (L) which is approximately in the range of 0.5 mm to 4 mm, in particular 1.5 mm to 2.5 mm.

6. Connecting device according to claim 4 or 5, characterized in that in the inserted state of the press-in section (4), the holding elements (20) with outer holding edges (26) in the region of the cylindrical holding surface portion (24) for verkrallenden engagement reach that between the holding edges (26) and the mouth-side end (28) of the cylindrical retaining surface portion (24) an axial distance (x) is present, which is at least 0.5 mm.

7. Connecting device according to one of claims 4 to 6, characterized in that the cylindrical retaining surface portion (24) is formed by a radial recess in the conical inner surface of the connection opening (6), wherein preferably the retaining surface portion (24) on the one hand to the mouth side (22) with the same inner diameter and on the other hand opposite over a radial, the inner diameter reducing step surface (30) merges into the conical inner surface of the connection opening (6).

8. Connecting device according to one of claims 4 to 6, characterized in that the cylindrical retaining surface portion (24) merges in both axial directions in each with the same inner diameter adjacent conical inner surface portions (6a, 6b) of the connection opening (6), wherein the conical inner surfaces (6a , 6b) have the same or different cone angle (α).

9. Connecting device according to one of claims 3 to 8, characterized in that the press-in section (4) of the Einpresspatrone (2) on its outer circumference in an annular groove (36) has a metallic, annular, distributed over the circumference holding elements (20) and preferably at a peripheral point a continuous interruption (34) exhibiting holding part (32) carries.

10. Connecting device according to claim 9, characterized in that the holding part (32) is designed as a substantially cylindrical sheet metal shaped part, wherein the holding elements (20) are designed as freely cut and obliquely outwardly bent retaining tongues (38, 38a). are formed.

11. Connecting device according to claim 9 or 10, characterized Porsche Style nzeich net that the holding part (32) is rolled from a wire material such that its edges have natural rounding radii.

12. Connecting device according to claim 10 or 11, dad u rch geke nzeich nzeich net that the retaining tongues (38, 38 a) are punched out of the holding part (32) in that in the region of the holding edges (26) formed approximately radially outward punching burrs are.

13. Connecting device according to one of claims 9 to 12, characterized in that the holding part (32) has a number of six to fifteen holding elements (20) in particular in a uniform, radially symmetrical circumferential distribution.

14. Connecting device according to one of claims 10 to 13, characterized in that the holding part (32) has a radial thickness in the range of 0.2 mm to 0.6 mm, in particular 0.4 mm.

15. Connecting device according to one of claims 9 to 14, dadu rch gekennzeich net, that the interruption (34) of the annular holding part (32) extends over an angle of up to 30 °, so that the holding part (32) a Umgreifungswinkel greater / equal to 330 °.

16. Connecting device according to one of claims 9 to 15, d a d u r c h e c e n e s, in which the holding part (32) made of spring steel, preferably stainless steel or a beryllium alloy, in particular beryllium bronze exists.

17. Connecting device according to one of claims 3 to 16, characterized in that the press-in portion (4) of the Einpresspatrone (2) on its outer periphery in a holding elements (20) preferably in the insertion direction (52) upstream region carries at least one sealing ring (48) , wherein preferably within the connection opening (6) in the region of the sealing ring (48) a short cylindrical sealing surface area is provided.

18. Connecting device according to one of claims 1 to 17, characterized in that the Einpresspatrone (2) is designed as a plug-in coupling part for releasably connecting a media line.

19. Connecting device according to one of claims 1 to 18, characterized in that the Einpastepatrone (2) is designed as a sleeve part with a plug opening (10) for receiving a plug-in portion (12) connected to the media line or connectable plug part (14).

20. Connecting device according to claim 19, characterized by a holding device (54) for releasably locking the Einsteckabschnittes (12) in its in the plug-in opening (10) inserted and circumferentially sealed via a seal (56) state.

21. Connecting device according to claim 19 or 20, characterized in that within the Einpresspatrone (2) a radially elastic latching element (58) for the form-locking latching behind a radial latching step (60) of the Einsteckabschnittes (12) is mounted.

22. Connecting device according to claim 21, characterized in that the press-in cartridge (2) consists of a sleeve-shaped outer part (62) and a coaxially seated in this sleeve-shaped inner part (64), wherein the Einpresspatrone (2) via the outer part (62) non-detachably in the connection opening (6) of the receiving part (8) is insertable, wherein the inner part (64) releasably connected to the outer part (62), and wherein the latching element (58) is mounted in that it can be removed from the outer part (62) by releasing the inner part (64).

23. Connecting device according to claim 22, characterized in that the outer part (62) and the inner part (64) are connected to each other in the manner of a bayonet connection.

24. Connecting device according to claim 22 or 23, characterized in that an annular gap between the inner part (64) and the outer part (62) via a seal (66) is sealed to the outside.

25. Connecting device according to one of claims 22 to 24, dad urch in that the inner part (64) and the outer part (62) in the region of flange-like connecting portions (68, 70) are connected.

26. Connecting device according to one of claims 22 to 25, characterized you rch means for securing the inner part (64) against accidental rotation relative to the outer part (62).

27. Connecting device according to claim 25, characterized in that at least one pin-like securing element (72) extends detachably through corresponding openings of the two connecting sections (68, 70) of the inner part (64) and the outer part (62).

28. Connecting device according to one of claims 21 to 27, characterized in that the latching element (58) is designed as a double latching element with two axially spaced partial latching elements (58a, 58b), that the plug-in section (12) on the one hand in a partially inserted Vorraststellung and on the other hand in a completely inserted and media-tight sealed full rest position can be locked, with a defined limited, especially acoustically perceiving leakage in the pre-locking position.

29. Connecting device according to claim 28, characterized in that the partial latching elements (58a, 58b) are formed as metallic spring clips and held in an annular, cage-like receiving part (82).

30. Connecting device according to one of claims 19 or 20, characterized in that within the Einpresspatrone (2) a slotted and thereby radially deformable clamping ring (84) is mounted, for locking the in particular from one end of a media lines (18) formed Einsteckabschnittes ( 12) cooperates with a within the insertion opening (10) provided inner cone (86).

31. Connection device according to claim 30, characterized in that the press-fit cartridge (2) consists of two parts of a housing part (90) having the press-in section (4) and a snap-fit and releasable positive connection (92 ) and the inner cone (86) having insert part (94).

32. Connecting device according to claim 30 or 31, characterized in that within the Einpresspatrone (2) an axially extending support sleeve (96) for non-positive engagement in the inserted plug-in portion (12) is arranged.

33. Connecting device according to claim 19 or 20, characterized in that the Einpresspatrone (2) on a outside of the receiving part (8) projecting portion (98) has a radially outwardly directed retaining edge (102), wherein the plug part (14) outer, Having radially elastic latch spring arms (104) with radially inwardly facing locking lugs (106) for latching over and behind the retaining edge (102) of the Einpresspatrone (2).

34. Connecting device according to one of claims 1 to 33, characterized in that the Einpresspatrone (2) made of plastic, in particular of a fiber-reinforced polyamide exists.

35. Connecting device according to one of claims 1 to 34, characterized by means for securing the Einpresspatrone (2) against rotation relative to the receiving part (8).

36. Connecting device according to one of claims 19 to 35, characterized by means for securing the plug part (14) against rotation relative to the Einpresspatrone (2).

37. Connecting device according to one of claims 1 to 36, characterized by a stop element (108) for defined Einsetzbegrenzung of the press-in section (4) by abutment against the receiving part (8).