Plug connector with pre-assembled safety device

Abstract

The invention relates to a plug connector (1) for connecting at least one first fluid line and a second fluid line provided with a mating connector (18) or for connecting components provided with a mating connector (18), comprising a housing (2). The housing (2) is configured at one end as a sleeve section (6) having a receiving channel (8) for receiving an adapter sleeve (10), wherein the adapter sleeve (10) can be inserted into the receiving channel (8) of the sleeve section (6) in an assembly direction (M) and is releasably held in the receiving channel (8) in an axially positive fit. The adapter sleeve (10) is configured with a through-hole (14) for a plug rod (16) of the mating connector (18) and has a retaining device (20) for releasably securing the mating connector (18). When the plug connector (1) is in the assembled position, the retaining device (20) can axially block the mating connector (18) relative to the assembly axis (X). The locking element (22) is axially movable relative to the assembly axis (X) and is arranged on the outer circumference (24) of the sleeve section (6) so as to be movable from a release position for releasing the holding device (20) to a locking position for locking the holding device (20). When the plug connector (1) is in the pre-assembly position, the locking element (22) in its release position is fixed at least in the axial direction against movement into the locking position.

Description

Technical Field

[0001] The present invention relates to a plug connector for connecting at least one first fluid line and a second fluid line having a mating connector, or for connecting components having a mating connector. The plug connector comprises a housing having a channel, wherein the housing end is configured as a sleeve section having a receiving channel fluidically connected to the channel and for receiving an adapter sleeve. The adapter sleeve can be inserted into the receiving channel of the sleeve section in an assembly direction axially directed relative to an assembly axis and is releasably retained in the receiving channel in an axially positive fit. The adapter sleeve has a through-hole for a plug pin of the mating connector and a retaining device for releasably securing the mating connector. In the idle state, the retaining device extends into the through-hole and is configured to elastically expand radially relative to the assembly axis into a tensioned state. The plug pin of the mating connector can be inserted into the through-hole of the adapter sleeve when the plug connector is in a pre-assembled position, and when the plug connector is in the assembled position, the retaining device can block the mating connector axially relative to the assembly axis. Furthermore, the locking element, which is axially movable relative to the assembly axis, is arranged displaceably on the outer circumference of the sleeve section from a release position that releases the holding device into a locking position that locks the holding device.

[0002] This type of mating connector has a plug shank and a retaining groove formed behind the plug shank in the assembly direction. After the mating connector is inserted into the plug connector or into an adapter sleeve arranged in the mating connector, a retaining device engages in the retaining groove of the mating connector and blocks axial movement of the mating connector against the assembly direction. Background Art

[0003] WO 2015 / 181396 A1 discloses a universal plug connector for connecting a mating connector. In this plug connector, an adapter sleeve has a locking tongue extending in the assembly direction. When inserted, the locking tongue engages axially in a recess in the peripheral wall of the sleeve section in a form-fitting, locking manner. Furthermore, the plug connector has a locking arm extending counter to the assembly direction. Its actuating extension engages in a latching groove of the mating connector and prevents movement of the mating connector counter to the assembly direction.

[0004] A disadvantage is that the locking tabs, which positively retain the adapter sleeve in the sleeve section, must be dimensioned so large that, given the given installation space for the connection, only one peripheral seal can be arranged to seal the peripheral gap between the inner wall of the receiving channel and the plug shaft of the mating connector. Consequently, the known embodiment can only be used to a limited extent, in particular in mating connectors with a plug diameter greater than 14 mm.

[0005] Furthermore, if the mating connector is pressed out of the plug connector against the direction of assembly, leakage may occasionally occur in known designs at high internal pressures and temperatures. This can be exacerbated, for example, by improper use and / or external influences. Therefore, the embodiment according to WO 2015 / 181396 A can only be used to a limited extent due to the internal pressures and / or temperatures that occur.

[0006] WO 2015 / 181396 A1 provides a locking element arranged on the outer circumference of a sleeve segment to prevent an undesired release of a mating connector. The locking element is arranged axially movable relative to the assembly axis. In the locked position, the locking element prevents radial expansion of the locking arms and thus release of the mating connector. It has been shown that the locking element can transition to the locked position and prevent insertion of the mating connector even without an inserted mating connector, which increases assembly costs.

[0007] Another disadvantage is that the locking arm covers the plug shaft of the mating connector over a certain axial length in order to maintain radial elastic properties, but only covers a small area of ​​the mating connector. As a result, the mating connector can occasionally fail and separate from the plug connector, especially in the case of large sizes and vibrations, especially with a plug diameter of more than 14 mm. Summary of the Invention

[0008] The object of the present invention is to provide a plug connector which preferably works together with mating connectors known from the prior art and which overcomes the disadvantages known from the prior art, in particular at least reduces the assembly effort.

[0009] By securing the locking element, which is in its released position when the plug connector is in the pre-assembled position, at least axially on the sleeve section against movement into the locked position, it is prevented that the locking element can be axially moved into the locked position relative to the assembly axis if the mating connector is not inserted or not inserted deep enough into the plug connector or the adapter sleeve.

[0010] In an advantageous embodiment of the present invention, the form-fitting element secures the adapter sleeve in the receiving channel in a form-fitting manner in the axial direction relative to the assembly axis. In particular, the form-fitting element extends into the through-hole of the adapter sleeve in the rest state and is designed to be elastically expandable radially relative to the assembly axis into a tensioned state. In this case, the form-fitting element and / or the retaining device can be expediently elastically expanded from their respective rest state into a tensioned state by a force acting at least radially outward relative to the assembly axis.

[0011] Advantageously, this embodiment enables the plug rod to exert a radially outward force on the locking element and / or the retaining device when it is inserted into the through hole, thereby converting the corresponding elements into a tensioned state and / or a stationary state when the mating connector is inserted in the assembly direction or returned against the assembly direction.

[0012] During assembly, the mating connector is inserted into the through-hole with its plug shaft in the assembly direction. The plug shaft passes through the portion of the retaining device and the portion of the form-fitting element in the through-hole. The plug shaft, the form-fitting element, and the retaining device are preferably designed to correspond to one another so that the plug shaft exerts a force on the retaining device and the form-fitting element radially outward relative to the assembly axis, thereby elastically deforming the retaining device and the form-fitting element radially outward.

[0013] In a known manner, the mating connector has a latching groove behind the plug shaft, which has a smaller diameter than the plug shaft. In the assembled position of the plug connector, the retaining device advantageously abuts the latching groove of the fully inserted mating connector, so that the retaining device can be deformed back from the expanded, tensioned position to the rest position in the region of the latching groove. This advantageously prevents axial movement of the mating connector counter to the assembly direction in a form-fitting manner.

[0014] By advantageously setting the tensioned state and the rest state of the holding device and / or the form-fitting element of the docking connector, it is possible to control the insertion depth of the docking connector during and after insertion by controlling the state of the holding device and / or the form-fitting element in the rest state or the tensioned state.

[0015] In particular, the form-fitting element is designed as a connecting clamp and has two clamping arms. In the idle state, the clamping arms extend into the through-opening of the adapter sleeve, wherein the clamping arms preferably have at least one contact section. The clamping arms are expediently connected via the contact section, wherein the contact section is particularly arranged in a slit in the sleeve section and is overlapped on one side by the locking element.

[0016] Preferably, the sleeve section and the adapter sleeve each have at least one slot radially relative to the assembly axis. The at least one slot in each of the adapter sleeve and the sleeve section is expediently arranged adjacent to one another when the adapter sleeve is fixed in the sleeve section such that a form-fitting element, in particular a form-fitting element designed as a connecting clamp, can be introduced radially relative to the assembly axis through the slot in the adapter sleeve and the sleeve section into the through-hole of the adapter sleeve.

[0017] The form-fitting element in the stationary state extends radially outwardly from the split of the adapter sleeve in accordance with the purpose relative to the assembly axis.Thus, the form-fitting element in the stationary state advantageously blocks the locking element from moving from the release position to the locking position.

[0018] The adapter sleeve preferably has two windows that are 180° opposite each other and open radially relative to the assembly axis. The windows are arranged axially spaced apart from the split relative to the assembly axis. In particular, the windows are arranged offset 90° relative to the split about the assembly axis. The retaining device expediently has two retaining arms that surround the windows and, in the idle state, project through the windows into the through-hole of the adapter sleeve.

[0019] In particular, due to their elasticity, the support arms always strive for a rest state, so they must be actively pushed into a tensioned state. Particularly advantageously, the retaining arms surround the mating connector when the mating connector is inserted in the insertion direction or arranged in the through-opening in the assembled state.

[0020] The plug shank and the through-hole of the mating connector are preferably cylindrical. The plug shank of the mating connector advantageously has a diameter that is greater than the maximum distance of the retaining arms perpendicular to the assembly axis when the retaining arms are in the resting state. In particular, the maximum distance of the retaining arms perpendicular to the assembly axis when the retaining arms are in the expanded, tensioned state is equal to the diameter of the plug shank.

[0021] In another embodiment, the retaining arm has at least one contact portion. Each retaining arm expediently has one contact portion. The contact portion is advantageously arranged in a contact groove formed in the contact element or the inner wall of the adapter sleeve. Particularly advantageously, two circumferentially open contact grooves are arranged in the contact element of the adapter sleeve. The contact grooves serve as advantageous radial support and retaining elements for the retaining arm, allowing the retaining arm to be supported at least radially relative to the assembly axis and to hook into the contact grooves, thereby being retained in or on the adapter sleeve in the assembled position.

[0022] The retaining device expediently projects radially outward from the outer circumference of the adapter sleeve relative to the assembly axis, or extends from a cutout in the adapter sleeve, with the actuating device. In particular, the maximum radial distance of the actuating device from the outer circumference of the adapter sleeve is greater in the rest state than in the tensioned state. Particularly advantageously, the retaining device can be elastically deformed from the rest state into an expanded, tensioned state by a force acting radially from the outside on the actuating device, wherein, in particular, the actuating device is arranged opposite the contact groove. The retaining device is advantageously supported radially in the contact groove relative to the assembly axis by the contact portion. The radially acting force from the outside compresses the retaining device and elastically deforms it from the rest state into the expanded, tensioned state. This increases the maximum distance of the retaining arms from the assembly axis so that it corresponds at least to the diameter of the plug shaft of the mating connector.

[0023] If the mating connector is not inserted far enough into the through-hole in the assembly direction so that the latching groove is not adjacent to the retaining device, the retaining device, when in the tensioned state, effectively prevents the locking element from moving from the released position to the locked position by means of the actuating device. The advantage of preventing the locking element from moving into the locked position is that the user has additional control over the insertion.

[0024] To advantageously prevent the mating connector from being unintentionally separated from the plug connector, in the assembled state, the locking element extends through the free space with at least one pin protruding from the locking element axially opposite the assembly axis. The free space is advantageously designed to extend axially between the actuating device and the adapter sleeve. This advantageously secures the retaining device radially relative to the assembly axis in the rest position, and forces acting radially from the outside toward the assembly axis cannot move the retaining device from the rest position into the tensioned position.

[0025] Particularly preferably, at least one sealing element, preferably at least two sealing elements, is arranged in the receiving channel. The sealing element is preferably designed as an O-ring. The sealing element is expediently arranged between a side wall of the adapter sleeve pointing in the assembly direction and a stepped surface pointing opposite the assembly direction and extending perpendicularly to the inner wall of the receiving channel. The sealing element preferably seals the inner wall of the receiving channel.

[0026] A three-part seal has proven particularly advantageous, the use of which is only possible with the plug connector according to the present invention. The seal advantageously comprises two sealing elements, in particular O-rings, separated by a spacer ring. The three-part assembly is then arranged as described above.

[0027] Further advantageous embodiments of the invention can be derived from the following description of the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In the accompanying drawings,

[0029] Figure 1 shows an exploded view of the plug connector,

[0030] Figure 2 Shown Figure 1 A perspective view of the housing of the plug connector,

[0031] Figure 3 Shown Figure 1 A perspective view of the adapter sleeve of the plug connector in FIG.

[0032] Figure 4 Shown Figure 1 A perspective view of the form-fitting elements of the plug connector in FIG.

[0033] Figure 5 Shown Figure 1A perspective view of the retaining device of the plug connector,

[0034] Figure 6 Shown Figure 1 Perspective view of the locking element of the plug connector in FIG.

[0035] Figure 7 The plug connector is shown in the middle position along the Figure 1 sectional view along the assembly axis X, with the mating connector partially inserted up to the form-fitting element,

[0036] Figure 8 Shown along according to Figure 7 Cross-sectional view of the plug connector along the dividing line AA,

[0037] Figure 9 Shown along according to Figure 7 Cross-sectional view of the plug connector along the dividing line BB,

[0038] Figure 10 The diagram shows the middle position of the plug connector along the plug connector according to Figure 1 A sectional view along the assembly axis X with the mating connector partially inserted up to the sealing element,

[0039] Figure 11 Shown according to Figure 10 A cross-sectional view of the plug connector along the dividing line CC,

[0040] Figure 12 Shown according to Figure 10 A cross-sectional view of the plug connector along the dividing line DD,

[0041] Figure 13 The diagram shows the arrangement of the connector along the axis of the plug connector when the plug connector is in the assembled position. Figure 1 A sectional view of the assembly axis X with the docking connector fully inserted,

[0042] Figure 14 Shown according to Figure 13 A cross-sectional view of the plug connector along the dividing line EE,

[0043] Figure 15 Shown according to Figure 13 A cross-sectional view of the plug connector along the dividing line GG,

[0044] Figure 16 The connector is shown in the pre-assembled position along the Figure 1 A sectional view along the assembly axis X, without the mating connector inserted. DETAILED DESCRIPTION

[0045] In the individual figures of the drawings, identical parts are always provided with the same reference numerals.

[0046] The following description states that the invention is not limited to the exemplary embodiments and at the same time to all or several features of the described feature combinations, but rather that individual sub-features of this / each exemplary embodiment can also be significant for the subject matter of the invention independently of all other sub-features described in connection therewith and also in any combination with features of other exemplary embodiments.

[0047] Figure 1 A plug connector 1 is shown for connecting at least one first fluid conduit and a second fluid conduit configured with a docking connector 18 or for connecting components configured with a docking connector 18. The plug connector 1 comprises a housing 2, see Figure 1 and Figure 2 , with Figure 7 、 10 And the straight-through channel 4 shown in 13.

[0048] according to Figure 1 and Figure 2 In the figure, one end of the housing 2 is constructed as a sleeve section 6, which has a receiving channel 8, which is fluidically connected to the through channel 4 for receiving Figure 1 and Figure 3 The adapter sleeve 10 is shown in FIG.

[0049] Figure 1 and Figure 2 , it is also shown that the housing 2 preferably has an insert 11 at the end opposite the sleeve section 6, which is used, for example, for plugging in a first fluid line or a pipe connector. However, the insert 11 can also be configured as a sleeve for inserting a fluid line. Furthermore, the housing 2 can also have a second sleeve section at the end opposite the sleeve section 6, which has one or more features of the sleeve section 6 of the present invention. Alternatively, the housing 2 can be connected directly to the assembly at the end opposite the sleeve section 6, or connected thereto with a force fit, form fit, and / or material fit.

[0050] The plug connector 1 can also be designed as an angled plug connector, such as Figure 1 As shown. Alternatively, the plug connector 1 can be designed without a bend between the sleeve section 6 and the opposite end, or it can be designed with any angle between the sleeve section 6 and the opposite end. T-shaped or Y-shaped plug connectors 1 are also possible. In particular, in such a case, at least one end and at most each end is designed as a sleeve section 6.

[0051] The adapter sleeve 10 can be inserted into the receiving channel 8 of the sleeve section 6 in an assembly direction M pointing axially toward the assembly axis X. Figure 7 、 10 13 show the adapter sleeve 10 arranged in the receiving channel 8 of the sleeve section 6 .

[0052] Adapter sleeve 10 Figure 1 and 3 and is detachably held in the receiving channel 8 in an axially positively locking manner. Figure 3 The adapter sleeve 10 has a through hole 14 configured for a plug rod 16 of a mating connector 18. The mating connector 18 is Figures 7 to 15 is shown to illustrate the mode of operation.

[0053] In addition, the adapter sleeve 10 has Figure 1 and 5 The illustrated holding device 20 serves for releasably fixing the mating connector 18 , wherein the holding device 20 projects into the through-opening 14 in the rest state and is designed to be elastically expandable radially relative to the assembly axis X into a tensioned state. Figure 7 、 9 , 10 and 12 show the holding device 20 in a tensioned state. In contrast, the holding device 20 is Figure 5 、 13 , 15 and 16 are shown as being at rest.

[0054] The holding device 20 can expediently be produced from plastic, metal, a hybrid material or an injection-molded wire.

[0055] In the pre-assembled position of the plug connector 1, according to Figure 16 As shown, the plug rod 16 of the mating connector 18 can be introduced into the through hole 14 of the adapter sleeve 10, and the plug connector 1 Figures 13 to 15 In the illustrated assembled position, the retaining device 20 blocks the mating connector 18 axially relative to the assembly axis X. Figures 7 to 9 10 to 12 show the plug connector in two intermediate positions, in which the counter connector 18 is in each case partially introduced.

[0056] like Figure 1 and 6 As shown, a locking element 22 axially displaceable along the assembly axis X is arranged displaceably on the outer circumference 24 of the sleeve section 6 from a released position, which releases the retaining device 20 , to a locked position, which locks the retaining device 20 .

[0057] The mating connector 18 has a latching groove 26 in front of the plug shank 16 when viewed in the assembly direction M. Both the plug shank 16 and the latching groove 26 are preferably cylindrical in shape relative to the assembly axis X.

[0058] A connecting section 28 is provided on the end of the mating connector 18 opposite the plug shaft 16 for connecting fluid lines or components. An annular flange 30 is expediently formed between the connecting section 28 and the latching groove 26 of the mating connector 18 and can serve as a drive area for engaging an assembly tool.

[0059] The length of the plug shaft 16 of the mating connector 18 is expediently dimensioned so that when inserted into the adapter sleeve 10, the plug shaft 16 is Figure 13 As shown, it extends in the assembly direction M through the adapter sleeve 10 and into the receiving channel 8 of the housing 2 .

[0060] According to the present invention, Figure 16 As shown, the locking element 22 is fixed in its released position in the pre-assembled position of the plug connector 1 at least axially relative to the assembly axis X on the sleeve section 6 to prevent movement into the locked position. Figure 7 、 8 , 10, 11 and 16. In this released position, in particular, the plug rod 16 is not or only partially inserted into the through-hole 14 in the assembly direction M. Only when the plug rod 16 of the mating connector 18 is moved axially far enough in the assembly direction M relative to the assembly axis X, in particular at the latest when the plug rod 16 of the mating connector 18 is moved axially in the assembly direction M according to Figure 13 , the transition to the locked position is only initiated in a targeted manner when the plug connector 1 occupies a position corresponding to the assembly position of the plug connector 1 .

[0061] In the assembled position of the plug connector 1 , the locking element 22 then prevents the retaining device 20 from being elastically deformed into the tensioned state and the mating connector 18 from being able to be moved counter to the assembly direction M, in particular also relative to the plug connector 1 along the assembly direction M. In particular, separation of the mating connector 18 from the plug connector 1 is prevented.

[0062] The fact that the locking element 22 cannot block the holding device 20 as long as the locking element 22 is blocked in the released position prevents the holding device 20 from blocking the insertion of the plug shaft 16 of the mating connector 18 in the pre-assembly position.

[0063] The locking element 22 is preferably configured as a cylindrical Figure 6 As shown, the locking element 22 preferably has a hook 34 on the inner wall 32, which can engage with a correspondingly configured groove 36 on the housing 2. As a result, the locking element 22 is arranged on the housing 2 by means of a snap connection, which is configured in a force-and-form fit manner, at least in the released position. Preferably, the snap connection is used to fix the position of the plug connector 1 for transportation and storage and can be overcome by a manual force acting on the locking element 22 opposite to the assembly direction M. In particular, as Figure 6 As shown, the locking element 22 has two hooks 34 arranged 180° opposite to each other around the assembly axis X, wherein the housing 2 is configured with at least one latching groove 36 for each hook 34 corresponding to the two hooks 34. Particularly preferably, as Figure 2 As shown, the housing 2 has a latching groove 36 axially offset relative to the assembly axis X, so that the locking element 22 can be arranged in a locking manner in different positions on the housing 2 , in particular at least in a released position.

[0064] Preferably, if Figure 6 As shown, the locking element 22 has on its inner wall 32 a guide groove 38 extending axially relative to the assembly axis X. In particular, when the locking element 22 is arranged on the outer circumference 24 of the sleeve section 6 , the guide element 40 configured axially relative to the assembly axis X advantageously engages in the guide groove 38 of the locking element 22 and preferably prevents the locking element 22 from rotating relative to the sleeve section 6 about the assembly axis X.

[0065] In an advantageous embodiment, the form-fit element 12 secures the adapter sleeve 10 in the receiving channel 8 in a form-fitting manner in the axial direction of the assembly axis X. In this case, the form-fit element 12 expediently projects into the through-opening 14 in the idle state, whereby the cross section of the through-opening 14 is reduced in the region of the form-fit element 12. Furthermore, the form-fit element 12 is preferably designed to be elastically expandable in the radial direction relative to the assembly axis X into a tensioned state.

[0066] Expediently, the axial movement of the locking element 22 from the released position to the locked position is blocked by the form-fitting element 12 and is only released when the plug rod 16 of the mating connector 18 has moved axially far enough in the assembly direction M relative to the assembly axis X, i.e. it has passed the area of ​​the form-fitting element 12.

[0067] In particular, the form-fitting element 12 has the following features: Figure 8 、 11 14 and 15. The delivery opening 13 is completely surrounded by the interconnected clamping arms 46 and the adapter sleeve 10. The circumference and surface area of ​​the delivery opening 13 perpendicular to the assembly axis X are the same in both the rest state and the tensioned state, so that radial expansion also results in a radial contraction that is offset relative to the expansion.

[0068] Advantageously, the form-fitting element 12 and / or the retaining device 20 can be elastically expanded from their respective resting state into a tensioned state by means of a force acting at least radially outward relative to the assembly axis X. Thus, the retaining device 20 and / or the form-fitting element 12 can be designed corresponding to the plug shaft 16, in particular curved, such that when the plug shaft 16 is moved in the assembly direction M, the retaining device 20 and / or the form-fitting element 12 are elastically expanded into their respective tensioned state by a force component acting radially on the retaining device 20 and / or the form-fitting element 12.

[0069] In one embodiment of the invention, the sleeve section 6 and the adapter sleeve 10 each have at least one slit 42 which is radial relative to the assembly axis X. The respective radial slit 42 is located at Figure 2 and Figure 3 . Preferably, when the adapter sleeve 10 is in the fixed state in the sleeve section 6, the adapter sleeve 10 and the at least one slit 42 in the sleeve section 6 are arranged adjacent to each other, so that the form-fitting element 12 can be introduced radially relative to the assembly axis X through the sleeve section 6 and the slit 42 in the adapter sleeve 10 into the through-hole 14 of the adapter sleeve 10. In particular, the form-fitting element 12 is introduced radially relative to the assembly axis X into the through-hole 14 from the outside of the housing 2. Preferably, the form-fitting element 12 prevents both a rotation of the adapter sleeve 10 relative to the sleeve section 6 about the assembly axis X and an axial movement of the adapter sleeve 10 relative to the sleeve section 6 along the assembly axis X.

[0070] In particular, the sleeve section 6 and the adapter sleeve 10 each have two slots 42 which are arranged 180° opposite each other and are radial to the assembly axis X. For example, Figure 3 1 shows this embodiment of the adapter sleeve 10 and the sleeve section 6. In this embodiment, the form-fitting element 12 can be introduced into the through-hole 14 of the sleeve section 6 through the slot 42 radially relative to the assembly axis X, wherein the form-fitting element 12 extends into the sleeve section 6 and the adapter sleeve 10 through the opposite slots 42. In particular, the slot 42 is overlapped on one side by the locking element 22, as shown in FIG. Figure 8 、 11 16, the form-fitting element 12 can be arranged radially in the overlapping slit 42, and, in the tensioned state, the radial movement of the form-fitting element 12 through the overlapping slit 42 is blocked by the locking element 22. In particular, the form-fitting element 12 in this embodiment can be supported on the locking element 22, which overlaps the slit 42 on one side.

[0071] According to an advantageous embodiment, the form-fitting element 12 in the rest state projects radially from the slot 42 of the adapter sleeve 10 relative to the assembly axis X. In this way, the form-fitting element 12 in the rest state effectively prevents the locking element 22 from moving from the release position to the locking position. In particular, the locking element 22 is thereby fixed in the pre-assembled position of the plug connector 1, such as Figure 16 As shown, or in the middle position of the plug connector 1, as shown Figure 7 and Figure 8 shown.

[0072] Particularly advantageously, Figure 4 As shown, the form-fitting element 12 is designed as a connecting fixture. In particular, the form-fitting element 12 is designed here with two clamping arms 46. The clamping arms 46 are expediently connected to one another on one side via at least one bridge 48. Preferably, when the form-fitting element 12 or the connecting fixture is in the idle state, the clamping arms 46 project into the through-opening 14. In particular, the clamping arms 46 have at least one contact section 50. If the clamping arms 46 are connected to one another only on one side via the bridge 48, each clamping arm 46 has its own contact section 50 at its end that projects into the sleeve section 6. According to an advantageous embodiment, see Figure 4 , the clamping arms 46 are connected via the contact sections 50. Figure 8 、 11 and 14, the contact section 50 is expediently arranged in the slot 42 in the sleeve section 6 and is overlapped on one side by the locking element 22, as shown in FIG. Figure 8 、 11 , 14 and 16.

[0073] According to an advantageous embodiment of the present invention, Figure 4 、 8 , 11 and 14, an integrally molded support element 51 is advantageously provided on the abutment section 50. The support element 51 advantageously extends into the through hole 14 and can be supported on the plug rod 16 of the mating connector 18, in particular in the assembled position, see Figure 14 , or intermediate position, see Figure 11 Advantageously, the radial support of the support element 51 facilitates elastic deformation of the form-fitting element 12 with only its bridge portion 48 relative to the assembly axis X and relative to the sleeve section 6 in the radial direction towards the assembly axis when the clamping arms 46 are radially expanded. Figure 8 、 11 14 , the relative position of the abutment section 50 relative to the sleeve section 6 and / or the mating connector 18 is kept constant by the support element 51 before and after the expansion of the clamping arms, ie in the rest state and the tensioned state of the form-fit element 12 .

[0074] The clamping arms 46 are preferably shaped such that, in the assembled state, they are curved about the assembly axis X, see Figure 8 、 11 The curved shape is advantageous in that the plug rod 16 has an enlarged contact surface with the clamping arm 46 when the plug rod 16 is inserted in the assembly direction M. As a result, the radial elastic expansion of the clamping arm 46 is advantageously promoted.

[0075] Furthermore, the side 52 of the clamping arm 46 which in the assembled state points opposite to the assembly direction M is Figure 4 As shown, at least partially a chamfered surface can be formed, wherein the radial distance of the clamping arms 46 is reduced by the chamfered surface in the assembly direction M. The chamfered surface facilitates the introduction of the plug shaft 16 and improves the deflection force during the introduction in the assembly direction M, since the axially acting force component is deflected by the chamfered surface into a force acting radially outward relative to the assembly axis X and counter to the spring force of the clamping arms 46 .

[0076] In particular, when the form-fit element 12 is in the tensioned state, the distance between the bridge 48 and the contact section 50 is reduced. Advantageously, the form-fit element 12 is pulled completely into the slot 42, aligned with the outer circumference of the adapter sleeve 10. Advantageously, this embodiment has the result that the tensioning of the form-fit element 12 releases the locking element 22 for axial displacement.

[0077] In particular, the radially acting spring force of the clamping arms 46 behaves in such a way that when the plug shaft 16 is pulled out of the through-opening 14 of the adapter sleeve 10 from the inserted state counter to the assembly direction M, the clamping arms 46 deform back and the cross-section of the through-opening 14 of the adapter sleeve 10 is reduced again. The deformation and return of the clamping arms 46 also increases the distance between the bridge 48 and the contact section 50 , so that the bridge 48 protrudes from the recess 42 in the sleeve section 6 and blocks the locking element 22 in the released position.

[0078] Preferably, if Figure 3 As shown, the adapter sleeve 10 has two windows 54 that are 180° opposite each other and open radially relative to the assembly axis X. The windows 54 are particularly arranged axially spaced apart from the slot 42 relative to the assembly axis X. Furthermore, the windows 54 are expediently offset by 90° relative to the slot 42 about the assembly axis X. The windows 54 serve advantageously for arranging and guiding the holding device 20.

[0079] According to one embodiment, the holding device 20 has two holding arms 56, such as Figure 5 For example, Figure 9As shown, the holding device 20 surrounds the window 54 with these holding arms 56. When the holding device 20 is in a stationary state, the holding device 20 preferably extends into the through hole 14 of the adapter sleeve 10 with the holding arms 56 through the window 54. In particular, the holding device 20, as shown Figure 9 、 12 15 , a through-hole 21 is formed by the interconnected retaining arms 56 and / or preferably by the retaining arms 56 and the adapter sleeve 10. The circumference and the surface area of ​​the through-hole 21 perpendicular to the assembly axis X are the same in both the rest state and the tensioned state, so that radial expansion also results in a radial contraction offset relative to the expansion.

[0080] The plug shaft 16 of the mating connector 18 advantageously has a diameter DS, see Figure 7 , when the holding arm 56 is in a stationary state, the diameter is greater than the maximum distance LS of the holding arm 56 perpendicular to the assembly axis X, see Figure 5 The elastic force of the retaining arm 56 acting radially toward the assembly axis X is particularly manifested in that when the mating connector 18 is introduced into the through hole 14 of the introduction sleeve 10 so far in the insertion direction, the card slot 26 is as Figure 13 and Figure 15 When shown arranged adjacent to the retaining arm 56, the retaining arm 56 deforms back and extends again into the through hole 14 of the adapter sleeve 10. Thus, the retaining arm 56 is arranged in the card slot 26 and prevents the docking connector 18 from moving along the assembly axis X and / or against the assembly axis X.

[0081] The holding arms 56 preferably have at least one contact portion 58 , and the holding arms 56 advantageously each have a contact portion 58 . Figure 1 、 5 , 9, 12 and 15 corresponds to an advantageous embodiment and has two contact portions 58. An alternative embodiment having only one contact portion 58 connected to the holding arm 56 can be realized according to Figure 4 The contact section 50 of the form-fit element 12 in FIG.

[0082] The corresponding contact portion 58 is preferably arranged in a contact groove 60 which is formed in a contact element 62, see Figure 3 , or arranged in the inner wall 64 of the adapter sleeve 10. Particularly advantageously, the retaining arm 56 can be supported and hooked in the contact groove 60 at least radially relative to the assembly axis X and thus held in the assembled position in or on the adapter sleeve 10. The relative position of the contact portion 58 is determined by the contact groove 60, as shown in FIG. Figure 9 、 12As shown in FIG. 15 , before or after the expansion of the holding arm 56, that is, the shape-fitting element 12 remains constant in the static state and the tensioned state. The holding arm 56 has a contact portion 58, as shown in FIG. Figure 5 As shown, and according to Figure 9 、 12 The and 15 are arranged, in particular, in two contact grooves 60 open in the circumferential direction, which are formed in the contact element 62 .

[0083] Preferably, one or more contact grooves 60 form a clamping connection for the holding arms 56 or the contact portions 58. The clamping connection enables radial support of the holding arms 56 in the contact grooves 60 relative to the assembly axis X and also prevents the holding device 20 from being separated and falling off from the adapter sleeve 10.

[0084] Preferably, the corresponding contact portion 58 has at least one pin 80 protruding axially in the assembly direction M, which can engage in a hole configured corresponding to the pin 80 in the end face 82 of the sleeve section 6 pointing opposite to the assembly direction M. The pin 80 is Figure 5 . The corresponding pin 80 is advantageously arranged radially in the hole with a positive fit relative to the assembly direction M and, in particular, ensures the position of the retaining device 20 or the corresponding contact portion 58 in the corresponding contact groove 60. Alternatively, in an embodiment not shown, the contact portion 58 has a pin pointing opposite to the assembly direction M, which can engage in a hole in the adapter sleeve 10. According to another embodiment not shown, the adapter sleeve 10 and / or the sleeve section 6 has a pin pointing toward the contact portion 58, which engages in a hole formed in the corresponding contact portion 58.

[0085] Preferably, the holding arms 56, and in particular the clamping arms 46, are formed such that they are curved about the assembly axis X in the assembled state, see Figure 9 、 12 and 15. As also described with respect to the clamping arms 46, the curved shape promotes that the plug shaft 16 takes up a larger bearing surface with the clamping arms 56 when inserted in the assembly direction M. This advantageously promotes radial elastic deformation of the retaining arms 56.

[0086] Furthermore, the shape of the retaining arms 56 that is curved about the assembly axis X has the advantage that in the assembled state in which the mating connector 18 is fully inserted and secured by the retaining device 20 , see FIG. Figure 13 , better preventing accidental loosening, especially under vibrations. The curved design of the retaining arms 56 about the assembly axis X increases the contact surface of the retaining arms 56 in the latching groove 26 of the mating connector 18 in and against the assembly direction M. The increased contact surface makes it more difficult for the mating connector 18 to move in or against the assembly direction M or for the mating connector 18 to be unintentionally separated from the plug connector 1.

[0087] According to this embodiment of the form-fit element 12, the side surface 66 of the holding arm 56 pointing in the assembled state opposite to the assembly direction M can be at least partially configured with a bevel, such as Figure 5 As described, the introduction of the docking connector 18 and the radial expansion of the retaining arms 56 are thereby improved.

[0088] Advantageously, the retaining device 20 with the actuating device 68 protrudes radially relative to the assembly axis X from the outer circumference 70 of the adapter sleeve 10, as shown in FIG. Figure 7 and 9 , 10 and 12 and 13, 15 and 16. In particular, the maximum radial distance of the actuating device 68 from the outer circumference 70 of the adapter sleeve 10 is greater in the static state than in the tensioned state.

[0089] According to a preferred embodiment, the actuator 68 can be activated radially from the outside relative to the assembly axis X and Figure 5 The force F marked in the figure elastically deforms the retaining device 20 from the rest state into the tensioned state. For this purpose, the actuating device 68 is preferably arranged opposite the contact groove 60 in such a way that the contact groove 68 is located in the plane of the force flux of the force F. The retaining device 20 is supported in the one or more contact grooves 60 by means of one or more contact portions 58, in particular by the force F acting radially on the actuating device 68. In this case, the retaining device 20 is compressed between the one or more contact portions 58 and the actuating device 68. The compression causes the distance between the retaining arms 56 to increase. In the tensioned or compressed state, the radial distance between the retaining arms 56 is expediently at least as large as the diameter DS of the plug rod 16. According to Figure 13 This makes it possible that when the retaining device 20 is in a stationary state in the assembled state and is arranged in the groove 26 of the docking connector 18 and fixes the docking connector 18, the axial movement of the docking connector 18 relative to the assembly axis X can be actively released from the outside by the radial force F.

[0090] Advantageously, the reduction in the distance between the contact portion 58 and the actuating device 68 when the retaining device 20 is in the tensioned state results in a reduction in the radial distance between the actuating device 68 and the outer circumference 70 of the adapter sleeve 10, since the retaining device 20 is arranged in a clamped manner on one side with the contact portion 58 in the contact groove 60. This provides the assembler with control over the assembled state of the plug connector 1.

[0091] In particular, safety and insertion control are thereby improved, since the tensioned retaining device 20, in particular with the actuating device 68, prevents the locking element 22 from moving from the released position to the locked position. As long as the retaining device 20 is in the tensioned state, the mating connector 18 is not introduced far enough into the through-opening 14 of the adapter sleeve 10 in the assembly direction M, and the plug connector 1 is still in an intermediate position, such as Figures 10 to 12 shown.

[0092] When the plug connector 1 is in the intermediate position, the retaining element 20 and / or the form-fitting element 12 expand radially, in particular, such that the movement of the locking element 22 into the locked position is blocked by the retaining element 20 and / or the form-fitting element 12. In particular, the form-fitting element 12 expands radially such that it does not prevent the locking element 22 from moving into the locked position, wherein the retaining device 20 still bears against the plug shaft 16 of the mating connector 18 and is in a tensioned state. As a result, the locking element 22 cannot be ultimately transferred into the locked position.

[0093] According to one embodiment of the invention, the locking element 22 engages in the free space 74 with at least one spindle 72 which, in the assembled state, protrudes axially from the locking element 22 counter to the assembly direction M. The free space 74 is expediently designed to pass axially between the actuating device 68 and the adapter sleeve 10. Figure 6 The locking element 22 shown in an advantageous embodiment of the present invention has in particular two mandrels 72. The free space 74 is Figure 9 and 12 When the mandrel(s) 72 engage in the free space(s) 74 , the locking element 22 secures the holding device 20 radially relative to the assembly axis X in a stationary state.

[0094] In particular, the free space 74 is configured in such a way that, depending on the tensioned state or the rest state of the holding device 20, when the holding device, e.g. Figure 15 As shown, in the rest state and when the mating connector 18 is fully inserted into the through hole 14 of the adapter sleeve 10, the locking element 22 can only engage with the core axis 72 in the free space 74. The above embodiment provides the assembler with additional plug-in check and reduces the risk of incorrect assembly.

[0095] In another embodiment, the holding device 20 has a guide device 76, such as Figure 5 The guide device 76 interacts in particular with at least one guide groove 78 formed on the adapter sleeve 10 in such a way that the holding device 20 deflects a force F acting on the actuating device 68 from the outside, which is not perpendicular to the assembly axis, into a force F acting perpendicular to the assembly axis X. The guide device 76 particularly advantageously divides the free space 74 into two free spaces 74, such as Figure 15shown.

[0096] The guide means 76 are preferably configured as pins on the actuating means 68, which are directed radially relative to the assembly axis X, as shown in FIG. Figure 9 、 12 15 , it engages in a correspondingly configured guide groove 78 on the outer circumference 70 of the adapter sleeve 10 .

[0097] like Figure 7 、 10 As shown in Figures 13 and 13 , the receiving channel 8 of the sleeve section 6 is advantageously divided into cylindrical parts, wherein the diameter of the respective part increases counter to the assembly direction M.

[0098] In particular, the receiving channel 8 has an annular first step surface 84 between the first and second cylindrical portions. This first step surface 84 expediently serves as an insertion limit, which limits the insertion depth of the adapter sleeve 10 in the assembly direction M. In this case, the adapter sleeve 10 has, in particular, a support surface 86 which is also annular and is configured to correspond to a step surface pointing in the assembly direction M. When the adapter sleeve 10 is inserted into the receiving channel 8, the adapter sleeve 10 rests with the support surface 86 on the first step surface 84.

[0099] like Figure 7 、 10 , 13 and 15 , it is particularly advantageous if at least one sealing element 88, in particular an O-ring, is arranged in the receiving channel 8. Two sealing elements 88 are preferably arranged in the receiving channel 8. The sealing elements 88 are expediently arranged between a side wall 90 of the adapter sleeve 10 pointing in the assembly direction M and a second step surface 92 pointing opposite to the assembly direction M and extending perpendicularly from the inner wall 44 of the receiving channel 8. The sealing elements 88 advantageously seal the inner wall 44 of the receiving channel 8.

[0100] According to an advantageous embodiment, the second step surface 92 reduces the diameter of the receiving channel 8 to the diameter DA of the through-opening 14 of the adapter sleeve 10 .

[0101] The sealing element 88 serves particularly advantageously to seal the plug shaft in the circumferential direction relative to the sleeve section 6 or the inner wall 44 of the receiving channel 8 .

[0102] exist Figure 1 The three-part seal shown in perspective in FIG has proven to be particularly advantageous. In particular, the use of this three-part seal is only possible with the plug connector 1 according to the invention, since the invention enables an adapter sleeve 10 that is axially shorter relative to the assembly axis X than in the prior art.

[0103] The seal therefore advantageously comprises two sealing elements 88, in particular O-rings, which are separated from one another by a spacer ring 94. The three-part assembly is assembled in the through-opening 14 in the manner described above.

[0104] With the help of Figure 7 、 10 , 13 and 16 and their corresponding cross sections Figure 8 、 9 , 11 , 12 , 14 and 15 summarize the preferred insertion process of the mating connector 18 and the position of the plug connector 1 .

[0105] In the pre-assembly position, the docking connector 18 has not yet been inserted into the through hole 14. Figure 16 As shown. Both the retaining device 20 and the form-fitting element 12 are in a resting state. The locking element 22 is in the released position and is prevented from moving into the locked position by a bridge 48 that projects from the slot 42 on one side of the form-fitting element 12. On the other side, the form-fitting element 12 rests with its contact portion 50 on the locking element 22, in particular on the mandrel 72. The retaining element 20 protrudes at such a radial distance from the outer circumference 70 of the adapter sleeve 10 that a free space 74 is opened.

[0106] In the middle position of the plug connector 1, as Figures 7 to 9 As shown, the mating connector 18 is partially inserted in the assembly direction M up to the region of the retaining device 20. Due to the plug shaft 16, the retaining device 20 is in a radially expanded, tensioned state. The actuating portion 68 of the retaining device 12 is radially pulled in, thereby closing the free space 74 for the mandrel 72 to pass through. At the same time, the form-fitting element 12 remains at rest and continues to lock the locking element 22 in the released position.

[0107] In another intermediate position of the plug connector 1, such as Figures 10 to 12 As shown. The docking connector 18 is further partially inserted in the assembly direction M as far as the area of ​​the form-fitting element 12. The form-fitting element 12 is radially expanded by the plug shaft 16 into a tensioned state. Here, the form-fitting element 12 is supported on one side on the plug shaft 16 by the supporting element 51, so that the bridge 48 is pulled into the gap 42 completely aligned with the outer circumference of the adapter sleeve 10. Axial movement of the locking element 22 from the released position to the locked position is preferably still impossible, or in particular only slightly possible. The retaining device 20 is still in the radially expanded tensioned state as described above. The free space 74 is thus closed to the entry of the core shaft 72. The core shaft 72 preferably still abuts the actuator 68 or abuts the actuator 68 when the locking element 22 is moved axially, so that in both cases further movement into the locked position is prevented.

[0108] exist Figures 13 to 15shows the assembled position of the plug connector 1. Here, the mating connector 18 is fully and correctly inserted in the assembly direction M. The form-fitting element 12 is still in a tensioned state, and its obstruction of the locking element 22 is no longer in place. The latching groove 26 of the mating connector 18 is now located in the region of the retaining device 20, which elastically returns to its resting position and extends into the latching groove 26. The mating connector 18 is thus secured against axial displacement. Due to the resting position of the retaining device 20, the radial distance between the actuating device 68 and the outer circumference 70 of the adapter sleeve 10 increases again, thereby once again releasing the obstruction of the locking element 22. The locking element 22 can thus be fully moved axially relative to the assembly axis X into the locked position and, with its mandrel 72, into the free space 74. In this assembled position, the locking element blocks the retaining device 22 at the actuating device 68 against radial displacement, thereby preventing the retaining device 20 from unintentionally expanding into the tensioned state.

[0109] The insertion example clearly demonstrates that the mandrels 72 essentially have a triple function. On the one hand, they serve as abutment and / or support surfaces for the abutment section 50 of the form-fit element 12, allowing the form-fit element 12 to be retracted in a defined manner only on one side. On the other hand, the mandrels 72 block the axial displacement of the locking element 22 at the actuation portion 68. Furthermore, the mandrels 72 block the retaining element 20 in the stationary state and prevent unintentional release of the mating connector 18.

[0110] The invention is not limited to the exemplary embodiments shown and described, but also encompasses all equally functional embodiments within the meaning of the invention. It is expressly emphasized that the exemplary embodiments are not limited to all features in combination; rather, each individual sub-feature can also have its own inventive significance independently of all other sub-features.

[0111] Reference Signs List

[0112] 1 plug connector

[0113] 2 shell

[0114] 4 direct channels

[0115] 6 casing sections

[0116] 8 receiving channels

[0117] 10 adapter sleeve

[0118] 11 Insertion

[0119] 12Form-fit elements / connection fixtures

[0120] 13 Delivery hole

[0121] 14 through holes

[0122] 16 plug rod

[0123] 18 docking connector

[0124] 20 Holding device

[0125] 21 Through hole

[0126] 22 Locking element

[0127] 24 Outer circumference of casing section

[0128] 26 Docking connector slot

[0129] 28 connecting section

[0130] 30 Annular flange

[0131] 32 Inner wall of locking element

[0132] 34 hook

[0133] 36 Slot on the housing

[0134] 38 guide slots

[0135] 40 guide elements

[0136] 42 Rift

[0137] 44 Inner wall of receiving channel

[0138] 46 Clamping Arm

[0139] 48 Bridge

[0140] 50 Snapping segments

[0141] 51 Support elements

[0142] 52 The side of the clamping arm pointing in the opposite direction of the assembly direction

[0143] 54 Window

[0144] 56 Holding Arm

[0145] 58 Contact Department

[0146] 60 contact slots

[0147] 62 contact elements

[0148] 64 Inner wall of the adapter sleeve

[0149] 66 The side of the holding arm pointing in the opposite direction of the assembly direction

[0150] 68 Actuator

[0151] 70 Outer circumference of the adapter sleeve

[0152] 72 mandrel

[0153] 74 Free Space

[0154] 76 Guidance Device

[0155] 78 guide slots

[0156] 80 pins

[0157] 82 Front view of the sleeve

[0158] 84 First step surface

[0159] 86 Support surface

[0160] 88 Sealing element

[0161] 90 Side wall of the adapter sleeve

[0162] 92 Second step surface

[0163] 94 Spacer Ring

[0164] F is the force acting on the holding device

[0165] M assembly direction

[0166] X assembly axis

[0167] DA through hole diameter

[0168] DS plug stem diameter

[0169] LS holding arm distance

Claims

1. A plug connector (1) for connecting at least one first fluid line and a second fluid line having a mating connector (18) or for connecting an assembly having a mating connector (18), comprising a housing (2) having a through-channel (4), wherein the end of the housing (2) is configured as a sleeve section (6), which has a receiving channel (8) connected to the through-channel (4) and for receiving an adapter sleeve (10), wherein the adapter sleeve (10) can be inserted into the receiving channel (8) of the sleeve section (6) along an assembly direction (M) pointing axially with respect to an assembly axis (X) and can be releasably held in the receiving channel (8) in an axially positively locked manner, wherein the adapter sleeve (10) is configured with a through-hole (14) for a plug rod (16) of the mating connector (18) and has a through-hole for releasably A retaining device (20) for fixing the mating connector (18), wherein the retaining device (20) extends into the through-hole (14) in a static state and is configured to be radially elastically expandable into a tensioned state relative to an assembly axis (X), and the plug rod (16) of the mating connector (18) can be introduced into the through-hole (14) of the adapter sleeve (10) when the plug connector (1) is in a pre-assembled position, and when the plug connector (1) is in an assembled position, the retaining device (20) can axially block the mating connector (18) relative to the assembly axis (X), wherein a locking element (22) axially movable relative to the assembly axis (X) is movably arranged on the outer circumference (24) of the sleeve section (6) from a release position for releasing the retaining device (20) to a locking position for locking the retaining device (20), It is characterized by: When the plug connector (1) is in the pre-assembled position, the locking element (22) in its released position is fixed to the sleeve section (6) in a manner prevented from moving into the locked position at least in the axial direction. The form-fitting element (12) fixes the adapter sleeve (10) in the receiving channel (8) in a form-fitting manner in the axial direction relative to the assembly axis (X), extends into the through hole (14) in the static state, and is elastically expandable in the radial direction relative to the assembly axis (X) into a tensioned state. The sleeve section (6) and the adapter sleeve (10) each have at least one slit (42) radially relative to the assembly axis (X), wherein the adapter sleeve (10) and the at least one slit (42) of the sleeve section (6) are arranged adjacent to each other in a state in which the adapter sleeve (10) is fixed in the sleeve section (6), so that the form-fitting element (12) can be introduced radially relative to the assembly axis (X) through the slit (42) of the adapter sleeve (10) and the sleeve section (6) into the through-hole (14) of the adapter sleeve (10). The form-fitting element (12) protrudes radially from the slit (42) of the adapter sleeve (10) relative to the assembly axis (X) in a stationary state, whereby the form-fitting element (12) blocks the locking element (22) from moving from the release position to the locking position in a stationary state.

2. The plug connector (1) according to claim 1, It is characterized by: The form-fitting element (12) is designed as a connecting clamp and has two clamping arms (46), which extend into the through-hole (14) in the idle state, wherein the clamping arms (46) have at least one contact section (50), wherein the contact section (50) is arranged in a slot (42) in the sleeve section (6) and is overlapped on one side by a locking element (22).

3. The plug connector (1) according to claim 2, It is characterized by: The clamping arms (46) are connected via the contact sections (50).

4. The plug connector (1) according to claim 2, It is characterized by: A supporting element (51) is provided on the contact section (50), which extends into the through-opening (14) and can be supported on the plug shaft (16) of the counter-connector (18) in the assembled position.

5. Plug connector (1) according to claim 1, It is characterized by: The adapter sleeve (10) has two windows (54) which are 180° opposite to each other and radially open relative to the assembly axis (X), and are arranged axially spaced apart from the slit (42) relative to the assembly axis (X), wherein the retaining device (20) has two retaining arms (56) which surround the windows (54) and, in the static state, extend through the windows (54) with the retaining arms (56) into the through-hole (14) of the adapter sleeve (10).

6. Plug connector (1) according to claim 1, It is characterized by: The window (54) of the adapter sleeve (10) is arranged offset by 90° relative to the split (42) about the assembly axis (X).

7. Plug connector (1) according to claim 5, It is characterized by: The retaining arm (56) has at least one contact portion (58), wherein the contact portion (58) is arranged in a contact groove (60) which is formed in a contact element (62) or an inner wall (64) of the adapter sleeve (10), wherein the retaining arm (56) can be supported radially relative to the assembly axis (X) and hooked in the contact groove (60) with the at least one contact portion (58) so as to be held in or on the adapter sleeve (10) in the assembled position.

8. Plug connector (1) according to claim 7, It is characterized by: The holding arms (56) each have a contact portion (58) and are arranged in two circumferentially open contact grooves (60) which are formed in the contact element (62).

9. Plug connector (1) according to claim 7, It is characterized by: The retaining device (20) projects radially with the actuating device (68) from the outer circumference (70) of the adapter sleeve (10) relative to the assembly axis (X), wherein the maximum radial distance of the actuating device (68) from the outer circumference (70) of the adapter sleeve (10) is greater in the rest state than in the tensioned state.

10. Plug connector (1) according to claim 9, It is characterized by: The retaining device (20) can be elastically deformed from a rest state into an expanded, tensioned state by a force (F) acting radially on the actuating device (68) from the outside, wherein the actuating device (68) is arranged opposite the contact groove (60) and the retaining device (20) is radially supported in the contact groove (60) with the contact portion (58) relative to the assembly axis (X).

11. Plug connector (1) according to claim 10, It is characterized by: In the tensioned state, the retaining device (20) blocks the locking element (22) from moving from the release position to the locking position with the actuating device (68).

12. Plug connector (1) according to claim 10, It is characterized by: The locking element (22) extends in the assembled state with at least one core shaft (72) protruding axially from the locking element (22) opposite to the assembly direction (M) through the axially guided free space (74) between the actuating device (68) of the retaining device (20) and the adapter sleeve (10), wherein in the static state, the locking element (22) radially fixes the retaining device (20) relative to the assembly axis (X).

13. Plug connector (1) according to claim 10, It is characterized by: The retaining device (20) has a guide device (76) which cooperates with at least one guide groove (78) formed on the adapter sleeve (10) so that a force (F) acting on the actuating device (68) from the outside and not perpendicular to the assembly axis (X) is deflected into a force (F) acting perpendicular to the assembly axis (X).

14. Plug connector (1) according to claim 1, It is characterized by: At least one sealing element (88) is arranged in the receiving channel (8), and the sealing element (88) is arranged between a side wall (90) of the adapter sleeve (10) pointing in the assembly direction (M) and a step surface (92) pointing opposite to the assembly direction (M) and extending perpendicularly to the inner wall (44) of the receiving channel (8), wherein the sealing element (88) seals the inner wall (44) of the receiving channel (8).

15. Plug connector (1) according to claim 14, It is characterized by: At least two sealing elements (88) are arranged in the receiving channel (8).

Images