CONNECTOR AND ARRANGEMENT OF A RETAINING ELEMENT AND A LOCKING DEVICE FOR IT

Description

[0001] The invention relates to a connector, in particular for hoses and / or pipes, comprising at least one socket part and at least one plug part, wherein the plug part can be inserted into or is inserted into a socket section of the socket part, and wherein at least one retaining element is provided for releasably holding the plug part in the socket part, and wherein the plug part can be provided with or is provided with the retaining element, and the retaining element is radially expandable in at least one section and has at least one retaining arm with at least one externally projecting locking lug, wherein the at least one retaining arm has a free end and an end fixed to the retaining element body and is spring-elastically movable in the radial direction with respect to the plug part for locking the at least one locking lug onto at least one locking surface or a locking opening of the socket part and releasing it from there.and wherein at least one locking device is provided for securing the latching state of the plug part and socket part and for indicating incorrect assembly of the latter, wherein the at least one locking device interacts with the at least one retaining element.

[0002] Connectors with a plug part and a socket part are known in the prior art in a wide variety of designs. To secure the plug part in the socket part, it is also known to provide retaining elements for this purpose. These are known in a wide variety of configurations. For example, according to EP 0 999 398 B1, a connector for hoses and / or pipes consists of a socket part and a plug part, wherein the plug part is inserted into a receiving opening in the socket part with a plug shaft. The inserted plug part is sealed against the socket part by a circumferential seal and secured against being pulled out by a locking device. Inside the socket part, a hollow cylindrical plug pin is arranged, which engages axially in the inserted plug shaft.The locking device consists of at least two diametrically opposed locking arms of the connector part, extending axially in the release direction approximately parallel to the insertion axis and spring-elastic in the axial direction. When inserted, each locking arm engages a positively interlocking undercut surface formed in the receiving opening of the sleeve part. The locking device is formed integrally with the connector part.

[0003] From DE 86 04 217 U1, another plug connection for pressure medium lines, in particular for connecting brake lines to a brake valve body, is known. This connection consists of a housing and a plug with a through-hole that can be inserted into a connection bore in the housing with its plug shaft. The plug is held axially against displacement by a retaining element and sealed by a circumferential seal arranged between the plug shaft and the housing. The plug is fixed against rotation relative to the housing by a positive locking connection. This positive locking connection consists of two locking elements arranged on the circumference of the plug shaft and connected to it in a rotationally fixed manner. These locking elements engage in openings in the housing when the plug is inserted. The locking elements consist of locking tongues. Furthermore, a locking cap is slid over the insertion opening and covers it with its base.Its outer wall encloses the housing. The retaining element consists of a bayonet fitting, formed by a locking sleeve located on the connector shaft and the housing. The design of the connector only prevents radial disconnection.

[0004] EP 2 224 156 A2 and US 2008 / 0252071 A1 disclose a connector for media cables comprising a plug part that can be inserted into a receiving opening of a connector counterpart with a sealing plug shaft and can be detachably locked against the counterpart in a snap-fit ​​manner to prevent removal. The locking means consist of at least two locking arms of the plug part, which extend approximately parallel to the insertion axis in the release direction and are spring-elastic in the radial direction. In the inserted state, the locking arms each engage a locking step located within the receiving opening of the connector counterpart in a form-fit or force-fit manner. The plug part and the locking arms are formed as a single, monolithic molded part. A locking element is movably connected to the plug part such that, in a locked position, it blocks the locking means against release, and in a released position, it releases them for a disengaging movement.The locking mechanisms are designed such that different forces must be overcome in the insertion and removal directions. Disassembly is achieved by grasping the end sections of the locking arms, which protrude from the connector counterpart and are located adjacent to the plug part.

[0005] EP 1 106 896 B1 discloses a further plug connection for pressure medium lines, consisting of a housing part and a plug part. The plug part is inserted into a receiving opening of the housing part with its plug shaft in a sealing manner and is releasably locked by means of a separate retaining element with retaining means that are elastically movable in the radial direction. This is achieved by the retaining element being positioned in a locking position with the retaining means between an inner annular step in the receiving opening and an outer annular step of the plug shaft, wherein the retaining element is axially displaceable on the plug shaft between a locking position and a release position such that the retaining means are blocked against radial release movement in the locking position and released for radial release movement in the release position.A spring element is positioned between the connector and the retaining element such that the retaining element can be automatically moved into the locked position by spring force and into the released position against the spring force. Axial assembly and disassembly are achieved by an axial lifting motion using a release or lifting tool on the retaining element. In addition to the retaining element, the spring element is necessary to enable the desired locking action.

[0006] From FR 2 930 621 A1, a further embodiment of a connector for a leakage oil line is known. In this solution, for locking, on the one hand, an annular retaining element is provided, which partially surrounds the connector part, and on the other hand, a tongue-shaped locking element is provided, which engages in a gap of the annular retaining element so that the locking means are in their locking position and deformation of the annular retaining element from its blocking position to its release position is prevented.

[0007] DE 39 24 173 A1 further discloses a connection fitting consisting of a connection element having a receiving bore for a pipe end provided with a retaining bead and a sealing ring encompassing the pipe end. For its attachment in the connection element, a bushing, which can be inserted into the receiving bore, is pushed onto the pipe end and has a radially deformable section. This section is provided in its bore with a groove that engages over the retaining bead and forms a locking mechanism that engages in a groove in the connection element. The pipe end is connected to the connection element by a simple push-fit operation and released again by opening the locking mechanism.

[0008] US Patent 6,688,654 B2 discloses a one-piece connector comprising a tubular element and a collar. A pair of diametrically opposed actuating arms hangs from the collar and lies in a first plane. A pair of diametrically opposed locking arms also hangs from the collar and lies in a second plane, perpendicular to the first plane. The locking arms engage with a rim at the end of a conduit. They can be moved between a locking position and an unlocking position, depending on the movement of the actuating arms.

[0009] From WO 2015 / 058857 A2, a connector comprising a socket part and a plug part is also known, wherein the plug part is inserted into a receiving opening of the socket part and wherein a retaining element is provided for releasably locking the plug part in the socket part. The retaining element and plug part are formed in two parts, and the retaining element is radially expandable and mounted on the receiving section of the plug part in a captive and rotationally secure manner. The retaining element has at least one retaining arm with an externally projecting retaining lug, wherein the retaining arm extends approximately parallel to the insertion axis of the plug part and can be moved in a spring-like manner in the radial direction with respect to the plug part in order to engage or disengage the retaining lug with a locking surface of the socket part.To enable the guided application of a release tool to the retaining element for releasing the connection between the plug part, the retaining element and the sleeve part, guide surfaces or guide sections are provided on the retaining element body adjacent to the free end of at least one retaining arm.

[0010] DE 10 2004 053 538 A1 discloses a coupling device for connecting lines to a holding device, which has an outer part and an inner part arranged in the outer part. The outer part and the inner part are movable between a locking position and a release position relative to each other and in the longitudinal direction of the holding device, wherein at least one wedge surface arranged inclined with respect to the longitudinal axis of the holding device is provided on the outer part, which interacts with at least one complementary wedge surface provided on the inner part.

[0011] WO 2015 / 180875 A1 discloses a connector for connecting at least one fluid line to another fluid line or a unit connection, comprising a housing with a through-channel, wherein one end of the housing is designed as a socket section for inserting a mating connector and has locking means for releasably securing the mating connector. The locking means are part of an adapter sleeve that can be inserted into the socket section and is held in the socket section by means of radially elastic positive locking elements, and has a through-opening for a plug shaft of the mating connector. The locking means are formed from at least two locking arms that are radially elastic with respect to a longitudinal center axis of the connector and are formed on the circumference of the adapter sleeve by slot-shaped cutouts in its sleeve wall.The locking arms have locking cams at their free ends extending radially towards the longitudinal center axis. The positive locking elements consist of radially elastic locking projections formed on the outer circumference of the adapter sleeve between the locking arms. When inserted, these projections engage in recesses in the circumferential wall of the sleeve section, providing a positive locking action. The locking cams are spaced radially from the longitudinal center axis at a distance smaller than the inner radius of the through-hole. At least in the area adjacent to the locking cams, the radial distance of the locking arms with respect to the longitudinal center axis is equal to the inner diameter of the sleeve.

[0012] The through-opening is smaller than the inner diameter of the through-opening. EP1369634A1 discloses a connector for use in connecting pipelines for liquids, and in particular a connector with a verification function to allow confirmation from the outside as to whether the pipeline connection has been completed. The present invention is based on the objective of further developing a connector according to the preamble of claim 1 in such a way that the locking state of the socket part and plug part is secured and incorrect assembly of the socket part and plug part can be quickly detected, in order to make such a connector even more reliable, especially when conveying pressurized medium through it.The problem is solved for a connector according to the preamble of claim 1 in that the at least one locking device is a radially pluggable locking element which interacts with the retaining element in the area of ​​its at least one retaining arm and is radially movable with respect to the retaining element or plug part and sleeve part and which is pre-assembled on the retaining element and can be moved from a pre-assembly position to a locking position.

[0013] The problem is further solved by an arrangement of a retaining element and at least one locking device for such a connector according to claim 15. Further developments of the invention are defined in the dependent claims. This creates a connector comprising at least one socket part and at least one plug part, which are pluggable into one another, wherein the plug part is inserted into a socket section with a receiving opening for the socket part. In addition to the at least one retaining element for releasably holding the plug part in the socket part, at least one locking device is provided for locking the plugging position of the plug part and socket part. The at least one retaining element is connected to the plug part, in particular by being pushed onto it. It is mounted securely on a receiving section of the plug part.The retaining element can be radially expanded in at least one section and has at least one retaining arm with at least one externally projecting locking lug, wherein the at least one retaining arm has a free end and is attached to the retaining element body and can be moved in a spring-like manner in the radial direction relative to the connector part. This makes it possible to engage the at least one locking lug, which is arranged on the retaining arm, with a locking surface or locking opening of the socket part and to release it from the engagement position there. To secure the engagement of the connector part and socket part, at least one locking device is provided, which also enables the indication of incorrect assembly of the connector part and socket part.At least one locking device is radially attached to the retaining element. It interacts with the retaining element in the area of ​​its retaining arm(s) in such a way that, when the locking device is engaged, the plug and socket parts cannot be fully assembled; that is, they cannot be completely inserted into each other. Furthermore, the locking device interacts with the retaining element on the plug part in such a way that the locking device can only be released and moved into a position that secures the connection when both the plug and socket parts are fully inserted. Thus, it is both visually apparent and perceptible by touch whether a correct and complete connection and final position—i.e., a complete assembly—of the plug and socket parts has been achieved.If, for example, the locking mechanism protrudes from the surface of the connector in an unintended manner, it is visually and tactilely apparent that incorrect or incomplete assembly of the plug and socket parts must be present. Furthermore, if the plug and socket parts cannot be fully inserted because the locking mechanism is in its position, which under normal conditions secures and locks the complete assembly of the plug and socket parts, it can also be readily determined that the plug and socket parts are not fully assembled. Therefore, there is a risk that, if pressurized media is passed through the connector in this position, the plug and socket parts may separate. This is especially true for pressurized media passing through hoses or other components.When pipes equipped with the connector are passed through, there is a risk of damage from the pressurized medium, which could suddenly sever the incomplete connection between the plug and socket parts and escape from the disconnected connector. To reliably prevent this, the locking mechanism allows for visual and tactile detection of incorrect or incomplete assembly of the plug and socket parts. Additionally, at least one second locking mechanism can be color-coded or have a colored marking, if necessary.All parts of the connector may be colored or marked differently, so that a visual check of the correct insertion position of the plug part and socket part and the locking device is possible by visually checking at least one locking device, i.e., its position on the connector.

[0014] By providing at least one locking device as a radially pluggable locking element, particularly similar to a retaining clip, it is possible, for example, to visually and haptically verify the proper assembly status of the connector, i.e., the correct and complete insertion of the plug and socket parts. This is achieved by visually and / or haptically checking the position of the radially pluggable locking element. In particular, an incomplete insertion or incorrect assembly of the plug and socket parts can be detected if the radially pluggable locking element protrudes significantly beyond the surface of the socket and plug parts and does not engage securely with the retaining element.Through its interaction with at least one retaining arm of the retaining element, the radially pluggable locking element can block the locking element as long as it is not fully inserted or is incorrectly inserted, i.e., as long as the plug part and socket part are not properly assembled. Conversely, the retaining arm of the retaining element can prevent the radially pluggable locking element from being inserted into its fully inserted position as long as the retaining arm is not in the locking position of its at least one locking lug on the locking surface or locking opening of the socket part. Therefore, the radially pluggable locking element is particularly advantageous in a U-shape in plan view, with two legs and a transverse section arranged between them, wherein at least one section or locking section of the legs serves to engage between the free end of the at least one retaining arm and the plug part.Between the free end of the retaining arm and the outer surface of the connector part, a gap is advantageously provided when the retaining element and the locking groove, opening, or surface in the sleeve part are fully engaged. The legs of the radially pluggable locking element or locking device, in the form of such a radially pluggable locking element, can engage in this gap and thus engage the retaining element or its retaining arms. The legs of the radially pluggable locking element advantageously have locking sections for engaging behind the retaining arms of the retaining element.

[0015] The inclusion of at least one locking device ensures a secure connection between the plug and socket parts of the connector and also indicates incorrect assembly. The locking device, or radially insertable locking element, is accordingly radially movable relative to the retaining element (plug and socket parts) and can be pre-assembled or is pre-assembled on the retaining element. It can be moved from a pre-assembly position to a locked position. The locking device allows for verification of the correct insertion position of the plug and socket parts in two ways: Complete radial insertion of the locking device, in the form of a radially insertable locking element, is only possible when the plug and socket parts are fully inserted, thus fully assembled, and in the desired final position.Advantageously, a transport locking position is provided for the locking device, wherein at least one locking section or at least one locking element prevents the locking device from being moved or pushed radially into its end position when the plug part and socket part are not fully inserted, i.e., when the plug connection is not fully and securely inserted.

[0016] If the radially pluggable locking element is improperly inserted into its final position under force, without the plug and socket parts being fully connected, it is no longer possible to attach the socket part to the plug part in this position. This is because the radially pluggable locking element, inserted between the retaining arms and the plug part, prevents this. The retaining arms are blocked, thus preventing the locking lug on the retaining arm from engaging with the locking surface or opening on the socket part. Therefore, when the radially pluggable locking element is fully inserted, the retaining arm(s) are blocked, preventing them from moving radially relative to the plug part. This prevents the locking lug(s) from engaging with at least one locking surface or opening on the socket part.

[0017] The transverse section arranged between the legs of the radially insertable locking element is advantageously provided with at least one projecting locking element that engages in or engages in at least one opening in the retaining element. The locking element is particularly advantageously tongue-shaped and has a fixed end attached to the transverse section and a free end, the free end being provided with at least one projecting, nose-shaped detent section. The projecting, nose-shaped detent section serves, on the one hand, to engage in an opening in the retaining element and secure the locking element in the opening against independent movement, such as sliding or slipping out, or release from this opening; on the other hand, it prevents engagement by bracing the nose-shaped detent section against the outside of the retaining element.Without applying a pressure force perpendicular to the locking element, the nose-shaped detent prevents the radially insertable element from being inserted into its full insertion position. Furthermore, a captive locking mechanism holds the radially insertable locking element in a captive position, so that once the radially insertable locking element is attached to the retaining element, it is fixed to the retaining element and can be radially displaced. The pressure force required to deflect the locking element, bringing it into an aligned position above the opening, can be applied to the locking element by the sleeve section.When the radially insertable locking element is moved into the fully inserted position, thus preventing the connector part from unintentionally detaching from the socket part, the locking element engages in the opening in the retaining element and is held securely in place by its lug-shaped locking section. Accordingly, the locking element, which is placed onto the connector part, advantageously has a corresponding opening in the area between the at least two opposing retaining arms, into which the locking element, in particular a tongue-shaped locking element, can engage and be held in place by its protruding lug-shaped locking section. This provides a double check of the connector part's insertion position by the retaining arms and the locking element of the locking device.The radially insertable locking element can be used, with one check relating to the position of the edge of the sleeve part and another check relating to the fully (radially) outwardly deflected position of the retaining arms. If the plug part is inserted deeply enough into the sleeve part, the sleeve part can, for example, engage the locking element with an edge or a projecting or protruding section and deflect it so that it lies over the opening and, when a radially directed compressive force relative to the retaining element is applied to the radially insertable locking element, it can be moved into its fully inserted position.In this design, the retaining arms are prevented from being actuated in a radial (release) direction. With a fully inserted connection / connector, this means the retaining arms cannot be moved into the release position, and if the socket part is missing, it prevents it from being attached to the plug part. When the radially insertable locking element is fully inserted into the retaining element, the detent section located at the end of the locking element rests in the opening in the retaining element and is held in place by the opening or its edge. Therefore, the locking device can advantageously only be fully inserted into its final position if the locking element projects into the opening of the retaining element, or if the lug-shaped detent section of the locking element is located in this opening, and the retaining arms of the retaining element are radially movable.

[0018] The locking element and the rim or radially projecting section of the socket part can thus interact in such a way that the locking element is released by the rim or radially projecting section of the socket part and guided into the opening of the retaining element. Such a rim or radially projecting section, particularly at the rim of the socket part, presses against the tongue-like locking element when the socket part is axially pushed onto the plug part, so that its end-mounted, nose-shaped detent section is deflected and thereby moved through the opening in the retaining element. In this position, radial insertion of the radially pluggable locking element into the fully inserted position, thus locking the plug part and socket part together, is possible.The nose-shaped detent section thus serves to prevent radial displacement of the locking device into a locking position in which the locking element engages in the opening in the retaining element, and to prevent the locking element from being withdrawn from this opening.

[0019] Furthermore, the positioning of the radially pluggable locking element, i.e., its actual insertion position or a release position and a locking position of the locking device in the form of the radially pluggable locking element, can be queried by the locking element. The locking element, or rather its protruding, nose-shaped detent section at the end of the tongue-like locking element, can only engage in at least one opening in the retaining element when the plug part and socket part are inserted correctly and in the correct insertion position. Thus, when the plug part and socket part are properly and completely inserted, the radially pluggable locking element is fully inserted; conversely, if the plug part and socket part are incorrectly assembled or only partially inserted, it is blocked.At the same time, the second locking device, particularly in the form of the radially insertable locking element, serves as a secondary locking mechanism. This reliably prevents the retaining element from accidentally releasing from its latched position in the socket part, as the fully inserted radially insertable locking element, acting as a locking device, prevents the retaining element from being unlocked or released from its latched position on the socket part. It engages the retaining arms that would otherwise cause such release, forcing them into the latched position and holding them there. The legs of the radially insertable locking element are therefore advantageously shaped and spaced such that, when fully inserted onto the retaining element, they engage two opposing retaining arms and lock them against radial release in the direction of the connector axis.Because the retaining arms are prevented from springing freely by the corresponding section of the legs of the radially pluggable locking element, and are instead held radially spaced from the plug part by the corresponding locking section of the legs of the radially pluggable locking element, it is no longer possible for the at least one locking lug of the at least one retaining arm of the retaining element to engage with the at least one locking surface or locking opening of the sleeve part, since the locking lug protrudes radially too far to engage with the locking surface or locking opening on the sleeve part. Therefore, if the radially pluggable locking element is improperly handled and the locking function of the transport safety device is overcome by means of the tongue-like locking element with its lug-shaped locking section, it can be forced onto the plug part or sleeve part.If the retaining element is fully inserted, i.e., in its final position, before the socket part is fully inserted onto the plug part, such complete insertion of the socket part onto the plug part is no longer possible due to the locking lugs on the retaining arms of the plug part's retaining element protruding too far radially. Conversely, if the plug part and socket part are only partially inserted, the radially insertable locking element cannot be fully inserted because the legs, or the corresponding locking section of the legs, of the radially insertable locking element cannot engage in the area between the free ends of the retaining arms and the plug part. This is because, in the case of incomplete insertion, the retaining arms are pressed too far radially towards the plug part by the socket part for the legs of the radially insertable locking element to engage there.This provides an additional safety measure. Accordingly, if the plug-in connector and socket are not fully inserted, the radially insertable locking element protrudes beyond the outer circumference of the plug-in connector at least far enough to be visually and tactilely perceptible. Only when the retaining arms of the locking element are free, i.e., when their locking lugs engage the corresponding locking surfaces of the socket or engage and lock into corresponding locking openings in the socket, is it possible to insert the legs of the radially insertable locking element with the corresponding locking section between the retaining arms and the plug-in connector, thereby moving them into the position that locks the retaining arms.

[0020] The connector part can be designed as a monolithic connector, with the retaining arms arranged directly on the body of the connector part, in particular being formed integrally with it. Alternatively, a separate retaining element can be designed and axially attached or slid onto a receiving section of the connector part. In this case, the connector part and retaining element are multi-part. However, it proves advantageous to provide a locking mechanism to prevent the retaining element from unintentionally detaching from the connector part.

[0021] The retaining element advantageously features retaining arms with locking lugs facing both inwards and outwards relative to the retaining element. A combination of outwardly and inwardly facing locking lugs on the retaining element serves not only as a locking device to prevent loss, but primarily to secure the retaining element to the connector part. The inwardly facing locking lugs absorb the same forces as the outwardly facing locking lugs.

[0022] Furthermore, when the connector and retaining element are designed in two parts, it proves advantageous to provide at least one of them with an anti-rotation device to prevent unintentional twisting of the connector and retaining element relative to each other during assembly and operation. In particular, the connector can be designed with multiple edges on its outer surface in at least one section to provide such an anti-rotation device. It is also possible for the socket to have at least one anti-rotation device to allow the socket to be attached to the connector in the desired orientation and position. In particular, the socket can have at least one projecting element and / or at least one anti-rotation surface and / or shape.Advantageously, the connector part and / or the retaining element attached to it or formed integrally with it has a corresponding mating surface, so that the contacting surfaces of the socket part and the connector part or retaining element on the latter prevent rotation of the connector part and socket part. This can also be provided by a correspondingly designed element or a groove, recess, or notch on the connector part or on the retaining element, on the connector part, or on the connector part, which engages with the at least one projecting element on the socket part and accordingly forms an anti-rotation device and / or positioning aid for the socket part relative to the connector part. Furthermore, the socket part can also have a groove, recess, or notch, or a corresponding undercut surface, into which a correspondingly projecting element on the connector part or on the retaining element engages.A retaining element engages on this to form an anti-rotation device and / or positioning aid.

[0023] It is further advantageous if the plug part, in particular the receiving part of the plug part for receiving the retaining element, is provided with at least one pressure-locking device that interacts with the retaining element and prevents the retaining element from being unlocked when pressure is applied inside the connector. If a pressure lock is provided, it is sufficient to provide the connector with at least one plug part and at least one socket part, wherein the plug part can be inserted into the socket section of the socket part, wherein the at least one retaining element is provided for releasably holding the plug part in the socket part, and wherein the plug part can be provided with or is provided with the retaining element.The pressure-locking device preferably comprises at least one element projecting from the outside of the receiving section of the connector part, in particular at least one projecting pin or at least one projecting protrusion. The retaining element advantageously includes at least one opening. This at least one opening is advantageously arranged in (at least) one of the retaining arms of the retaining element. Especially when there is pressure inside the connector, for example from a pressurized medium flowing through it, it is important that the connector part and socket part are securely held together.When the connector and retaining element are designed as two parts that are plugged together, it is advantageous to lock and hold the retaining element in place when media pressure is applied inside the connector by means of a pressure-locking device, in particular one or more elements projecting from the receiving section of the connector. A relative axial movement between the retaining element and the connector is caused by applying pressure to the connector. The latter moves axially in the opposite direction of insertion, while the retaining element is fixed axially immovable within the socket. For pressure locking, the projecting element is advantageously positioned outside an opening in the retaining element by shifting the retaining element relative to the connector in the axial direction of the retaining element. This prevents radial movement of the retaining arm or arms.It is therefore advantageous to provide such axial play in the retaining element on the receiving section of the connector part that it is at least sufficiently far from the opening for the insertion of the at least one projecting element, so that the retaining arms are not in a released position when the at least one projecting element is outside the opening. The axial displacement between the connector part and the retaining element moves the projecting elements out of the area of ​​the opening(s) and thus radially locks the retaining arms.

[0024] Furthermore, the receiving section can have edges and / or be polygonal or multi-sided and / or have protruding elements, such as struts, extending in the longitudinal direction of the connector part, which on the one hand interlock with correspondingly oppositely designed surfaces or sections of the retaining element, and on the other hand provide an anti-rotation device to prevent the retaining element from rotating on the receiving section of the connector part.

[0025] It is further advantageous if the sleeve part is made of at least one plastic material and is provided with at least one locking opening on its outer surface. Alternatively, the sleeve part can be machined, in particular made of at least one metal, and provided with at least one undercut surface as a locking surface for engaging the at least one locking lug of the retaining arm of the retaining element. Advantageously, if the sleeve part is made of at least one plastic material, it has a locking opening on its outer surface so that the at least one locking lug of the at least one retaining arm of the retaining element, which is or will be arranged on the connector part, can engage there. Alternatively, the sleeve part can be machined from at least one metal.In this case, it advantageously has a locking surface, which is in particular an undercut surface, so that the at least one locking lug of the at least one retaining arm of the retaining element, which is arranged on the connector part, can engage there. The connector part can thus be combined with a socket part made of a plastic material as well as with a socket part made of at least one metal. The connector part itself can also consist of at least one plastic material or at least one metal. In particular, the connector part can furthermore be designed as a straight connector part, an angled connector part, or in any shape, including curved shapes.

[0026] If, for example, the receiving section of the connector part on which the retaining element is mounted has a polygonal shape, particularly a square shape, the position of the retaining element with the locking device attached to it can be varied in 90° increments on the connector part or around its circumference to allow the locking device to be actuated from different directions. This proves particularly advantageous when the connector is or becomes difficult to access, for example, in a vehicle, especially in a very confined space. The ability to position the locking device in different locations on the retaining element or the connector part provides great flexibility, combined with the possibility of additionally locking the retaining arms of the retaining element.The locking element provides greater resistance to lateral forces acting on the connector, as well as to forces acting in the pull-out direction on the connection between the plug and socket parts. These pull-out forces act in the release direction, i.e., opposite to the insertion direction. Forces in the pull-out direction can occur when forces act on the respective hoses or pipes to which the plug and socket parts are connected, acting precisely in the pull-out direction with respect to the connection between the plug and socket parts. Lateral forces can occur during operation, for example, in a vehicle, particularly when driving on uneven terrain. Furthermore, adjacent components, such as...Other conductors or cable strands can act on the connector and exert pulling forces. However, the locking device, particularly the radially pluggable locking element, provides additional security for the connection between the plug and socket parts, thus creating special protection against pulling forces and forces acting laterally on the connector.

[0027] To further explain the invention, exemplary embodiments are described below with reference to the drawings. These show: Figure 1 shows a perspective view of a connector according to the invention, comprising a plug part and a socket part, in the delivery state with the plug part and socket part not yet connected, wherein the plug part is provided with a retaining element and a locking device according to the invention. Figure 1a shows a side view of the connector according to the invention.Figure 1 , Figure 1 legs opposite the view in Figure 1a Side view of the connector rotated by 90° according to Figure 1 , Figure 1ceine opposite the view in Figure 1a Side view of the connector rotated by 180° and slightly enlarged according to Figure 1 Figure 1 shows the front view of the plug part of the connector according to Figure 1 from the direction of its mandrel section, Figure 1e a longitudinal sectional view of the connector according to Figure 1 along line AA from Figure 1d Figure 1: Fine longitudinal section view of the connector according to Figure 1 along line BB from Figure 1d Figure 2 shows a perspective view of the connector according to Figure 1 in a first incomplete pre-assembly or pre-plugging position of plug part and socket part with retaining arms of the retaining element still blocked on the plug part, Figure 2a a side view of the connector according to Figure 2, Figure 2 legs opposite the view in Figure 2a Side view of the connector rotated by 90° according to Figure 2 , Figure 2ceine opposite the view in Figure 2a Side view of the connector rotated by 180° according to Figure 2 Figure 2 shows a cross-sectional view of the connector. Figure 2b along line CC, Figure 2e a front view of the plug part of the connector according to Figure 2 Figure 2: Fine longitudinal section view through the connecting connector according to Figure 2 along the in Figure 2e line BB, Figure 2, longitudinal section view through the connecting connector according to Figure 2 along line AA from Figure 2e Figure 3 shows a perspective view of the connector according to Figure 1in the fully inserted position of plug part and socket part with free retaining arms of the retaining element on the plug part and non-locking, i.e. free, locking device, Figure 3a a side view of the connector according to Figure 3 , Figure 3 legs opposite the view in Figure 3a Side view of the connector rotated by 90° according to Figure 3 , Figure 3ceine opposite the view in Figure 3a Side view of the connector rotated by 180° according to Figure 3 Figure 3 shows a cross-sectional view through the connector according to Figure 3 along the in Figure 3b Line CC shown, Figure 3e a front view of the plug part of the connector according to Figure 3 Figure 3: Fine longitudinal section view of the connector according to Figure 3 , shown along line BB from Figure 3e Figure 3 shows a longitudinal sectional view of the connector according to Figure 3 , cut along line AA from Figure 3eFigure 4 shows a perspective view of the connector according to Figure 1 in a fully inserted position with respect to the plug part and socket part, with a locking device also in its end position, Figure 4a a side view of the connector according to Figure 4 , Figure 4 legs opposite the view in Figure 4a Side view of the connector rotated by 90° according to Figure 4 , Figure 4ceine opposite the in Figure 4a The view shown is a 180° rotated view of the connector according to... Figure 4 Figure 4 shows a cross-sectional view of the connector along line CC. Figure 4b Figure 4 shows a front view of the plug part of the connector according to Figure 4 Figure 4: Fine longitudinal section view through the connecting connector according to Figure 4 along line BB from Figure 4e Figure 4 shows a longitudinal section view through the connecting connector according to Figure 4along line AA from Figure 4e Figure 5 shows a perspective view of a second embodiment of a connector according to the invention, comprising a plug part and a socket part, wherein the socket part is designed as a machined part, in a fully inserted position of the plug part and socket part, with the locking device also in a locking or latching end position. Figure 5a shows a side view of the connector according to the invention. Figure 5 , Figure 5 legs opposite the one in Figure 5a The side view shown is rotated 90°, Figure 5 is opposite the one in Figure 5a Side view of the connector rotated by 180° according to Figure 5 Figure 5 shows a cross-sectional view through the connector according to Figure 5 , cut along line CC from Figure 5b Figure 5 shows a front view of the plug part of the connector according to Figure 5 Figure 5: Fine longitudinal section view of the connector according to Figure 5, cut along line BB from Figure 5e Figure 5 shows a longitudinal sectional view of the connector according to Figure 5 , cut along line AA according to Figure 5e Figure 6 shows a perspective view of the connector according to Figure 1 , however, unlike this one, with the locking device inserted in the end position and the socket part not mounted, Figure 6a shows a side view of the connector according to Figure 6 , Figure 6 legs opposite the view in Figure 6a Side view of the connector rotated by 90° according to Figure 6 , Figure 6ceine opposite the in Figure 6a Side view of the connector rotated by 180° according to Figure 6 Figure 6 shows a slightly enlarged cross-sectional view of the connector according to Figure 6 , cut along line CC from Figure 6b Figure 6 shows a front view of the plug part of the connector according to Figure 6Figure 6: Fine longitudinal section view of the connector according to Figure 6 , cut along line BB from Figure 6e Figure 6 shows a longitudinal sectional view of the connector according to Figure 6 , cut along line AA from Figure 6e Figure 7 shows a perspective view of an angled connector part according to the invention, which in its receiving section is provided on the outside with projecting elements for forming a pressure locking device in combination with a retaining element attached therein; Figure 7a shows a longitudinal sectional view of the angled connector part according to Figure 7 Figure 8 shows a perspective view of a further embodiment of an angled connector part according to the invention, in which the receiving section for receiving a retaining element is designed with multiple edges to provide an anti-rotation device for the retaining element attached therein. Figure 8a shows a longitudinal sectional view of the angled connector part according to the invention. Figure 8Figure 9, a perspective view of a plug part designed as a straight plug part with projecting elements for forming a pressure locking device in conjunction with a retaining element mounted on the receiving section of the plug part; Figure 9a, a longitudinal section view through the plug part according to Figure 9 Figure 10 shows a perspective view of a straight plug part with a polygonal receiving section to form an anti-rotation device for a retaining element attached therein; Figure 10a shows a longitudinal section view through the plug part according to Figure 10 Figure 11 shows a perspective view of the socket part of the connector according to Figure 1 Figure 11a shows a longitudinal section view through the sleeve part according to Figure 11 Figure 12 shows a perspective view of the socket part of the connector according to Figure 5 Figure 12a shows a longitudinal section view through the sleeve part according to Figure 12Figure 13 shows various perspective views of a retaining element according to the invention for mounting on a receiving section of a plug part of a connector, and Figure 13 shows a detailed top view of the retaining element according to the invention. Figure 13a to 13e Figure 13 shows a first side view of the retaining element according to Figure 13a to 13e , Figure 13 Heine opposite the view in Figure 13g Side view of the retaining element rotated by 90° according to Figure 13a to 13e , Figure 13ieine opposite the view in Figure 13h Side view of the retaining element rotated by 180° according to Figure 13a to 13e Figure 13 shows a bottom view of the retaining element according to Figure 13a to 13e Figure 13, no longitudinal sectional view of the retaining element according to Figure 13a to 13e , cut along line DD from Figure 13j Figure 13 shows a further longitudinal section view of the retaining element according to Figure 13a to 13e , cut along line EE from Figure 13jFigure 14a-b Figure 14e perspective views of a locking device according to the invention, here in the form of a U-shaped radially pluggable locking element, Figure 14 fine top view of the radially pluggable locking element according to Figure 14a to 14e Figure 14 shows a bottom view of the radially pluggable locking element according to Figure 14a to 14e Figure 14 shows a longitudinal sectional view of the radially pluggable locking element according to Figure 14a to 14e , cut along line DD from Figure 14g Figure 14 shows another sectional view of the radially pluggable locking element according to Figure 14a to 14e , cut along line EE from Figure 14g Figure 14 shows a first side view of the radially pluggable locking element according to Figure 14a to 14e Figure 14: none opposite the one in Figure 14j The side view shown is a side view of the radially pluggable locking element rotated by 90° according to... Figure 14a to 14e , Figure 14 line opposite the in Figure 14jThe side view shown is a side view of the radially pluggable locking element rotated by 180° according to... Figure 14a to 14e Figure 15a shows a modular arrangement of a straight connector part and an angled connector part according to the invention with an O-ring as a sealing ring, a retaining element with a locking device for mounting on the respective receiving section of the respective connector part, and three different sleeve parts for combining with the connector parts. Figure 15 shows a perspective view of the modular arrangement of the two connector parts and three sleeve parts, as well as the retaining element with locking device according to the invention. Figure 15a Figure 15 shows another perspective view of the modular arrangement of the two plug parts, three socket parts and the retaining element according to Figure 15a, wherein the retaining element is provided with a locking device according to the invention in the release position, Figure 15 shows a further perspective view of the modular arrangement according to Figure 15a , comprising the two plug parts and three socket parts as well as the retaining element, which is again provided with the locking device in a release position, Figure 16a a perspective view of a connector according to the invention Figure 1 , wherein it is in a released pressure-lock position, Figure 16 legs front view of the plug part of the connector according to Figure 16a Figure 16 shows a longitudinal section view through the connector according to Figure 16a along line AA from Figure 16b Figure 16 shows a longitudinal section view of the connector according to Figure 16a , cut along line BB from Figure 16b, wherein, to illustrate the free position of the pressure lock, a detail in the area of ​​the retaining arms of the locking element is shown enlarged, Figure 16e a side view of the connector according to Figure 16 , wherein, to illustrate the free position of the pressure lock, a detail in the area of ​​a retaining arm of the retaining element is shown enlarged. Figure 17a shows a further perspective view of a connecting connector according to the invention in the embodiment according to Figure 1 Figure 17: Front view of the plug part of the connector according to Figure 17a Figure 17 shows a first longitudinal sectional view of the connector according to Figure 17a , cut along line AA from Figure 17b , Figure 17 your second longitudinal section view of the connector according to Figure 17a , cut along line BB from Figure 17b, in addition showing an enlarged detail view in the area of ​​the blocked pressure locking device, Figure 17e a side view of the connector according to Figure 17a , wherein an enlarged detail view in the area of ​​the blocked pressure locking device is additionally shown, Figure 18a a perspective view of a further embodiment of a connector according to the invention with a sensor instead of a second media connection, Figure 18a a side view of the connector according to Figure 18a Figure 18 opposite Figure 18b Side view of the connector rotated by 90° according to Figure 18a Figure 18 shows a top view of the sensor of the connector according to Figure 18a , and Figure 19 a perspective view of the plug part of the connector according to Figure 1 in one of these enlarged representations.

[0028] In the Figures 1 to 1fA connector 1 is shown, comprising a plug part 2, a socket part 3, a retaining element 4 attached to the plug part 2, and a locking device in the form of a radially pluggable locking element 5. The connector 1 is shown in the Figures 1 to 1f The diagram shows the product in its so-called delivery state, i.e., in its pre-assembled state. Here, plug part 2 and socket part 3 are not yet connected, but the retaining element 4 is attached to a receiving section 20 of plug part 2. This is particularly important for the Figures 1e and 1f , but also the Figures 1 to 1cparticularly easy to remove. The radially pluggable locking element 5 is in a pre-assembly position in which it is radially plugged onto the connector part 2, but is in the pre-assembly plug-in state in which the retaining element 4 is not locked, but released. In addition to the receiving section 20, the connector part 2 comprises a pin section 21, via which a connection is made, in particular with a pipe or hose line, which is in Figure 1 Not shown, it can be manufactured. Such a pipe or hose is pushed onto the mandrel section 21 at its end, i.e., mandreled there. The socket part 3 also has a corresponding mandrel section 30 in order to be able to secure a pipe or hose there as well, in particular by mandreling.

[0029] The sleeve part 3 further comprises a sleeve section 31 that receives the plug part 2 and is provided at its end with a section 33 arranged axially in the sleeve part 3 and projecting beyond the upper edge 32 of the sleeve section 31 of the sleeve part 3, as well as with a section 34 projecting radially from the upper edge 32 of the sleeve section 31 approximately opposite the axially projecting section 33. Approximately 90° offset from the two sections 33, 34, the sleeve section 31 of the sleeve part 3 has two opposing window openings 35, 36, which serve as locking openings for locking lugs 40, 41 on the retaining element 4. The locking lugs 40, 41 are arranged facing outwards on retaining arms 42, 43 of the retaining element 4, as is not only the Figures 1, 1a, 1b, 1c as well as 1f can be taken from, but especially good also the Figures 13a to 13l, in which the retaining element 4 is shown in detail. The retaining element 4 or the retaining element body 44 has a continuous circumferential edge at both of its opposite ends, namely a continuous edge 148 at one end and a bead-like projecting edge 47 at the opposite end of the retaining element 4 or retaining element body 44. The retaining arms 42, 43 and 140, 141 are alternately fixed to one edge 148 and the other edge 47, i.e., retaining arm 42 to edge 148, retaining arm 140 to edge 47, retaining arm 43 to edge 148, and retaining arm 141 to edge 47. In addition to the respective end 242, 243 fixed to edge 148 or to the retaining element body 44, the retaining arms 42, 43 each have a free end opposite the retaining element 44, extending radially (with respect to the Retaining element 4 or retaining element body 44) spring-elastic movable end 142, 143 on.The locking lugs 40, 41 are not located at the ends of the two retaining arms 42, 43, but rather along their longitudinal extent, in particular approximately in the middle region between the free end 142 or 143 and the fixed end 242, 243 of the retaining arms 42, 43. In addition to the respective end 244, 245 fixed at the edge 148, the retaining arms 140, 141 each have a free end 240, 241 opposite the fixed end 244, 245, which is spring-loaded and movable in the radial direction (relative to the retaining element 4 or retaining element body 44).

[0030] At the ends of the free ends 142, 143 of the retaining arms 42, 43, an actuating element 45, 46 projects approximately radially outwards, i.e., away from the retaining element body 44 of the retaining element 4. By applying a force directed radially inwards with respect to the retaining element 4, the locking lugs 40, 41 can be moved from a locked position to a disengaged position in order to release the connector part with the retaining element attached to it from the socket part, i.e., to move the locking lugs 40, 41 out of the locking openings or window openings 35, 36 and to allow axial removal of the connector part 2 from the socket part 3 or, conversely, of the socket part 3 from the connector part 2.

[0031] How especially the Figures 13a to 13lThe retaining element 4, adjacent to the respective actuating element 45, 46, but at a distance from it, has a bead-like projecting end edge 47. At the opposite end, the retaining element 4 has a continuous edge 148. In the area of ​​the actuating element 45, a section 48 projects axially from the bead-like projecting end edge 47 of the retaining element 4. Approximately 90° offset from this, i.e., between the two actuating elements 45, 46 or the corresponding retaining arms 42, 43, and thus at the mounting point of the retaining arm 140, adjacent to its fixed end 244, a radial section 49 projects outwards from the bead-like projecting end edge 47. This section serves to engage with the radially insertable locking element 5, which has a corresponding groove or recess 50 (see Figure 15d ) exhibits, into which the radial section 49 engages (see in particular Figure 1d as well as the Figures 14a and 14c Adjacent to the radial section 49, two axial webs 149, 249 are arranged on the retaining element body 44. On the side of the retaining element body 44 opposite the radial section 49, two corresponding axial webs 150, 250 project axially from the bead-like protruding end edge 47, as shown in particular Figure 1 as well as the Figures 13a and 13bcan be removed particularly well. The distance between the two axial webs 150, 250 is dimensioned in particular such that the axially projecting section 33 can engage in the upper edge 32 of the sleeve section 31 of the sleeve part 3 in order to provide a positioning aid and also anti-rotation device for the sleeve part 3 relative to the plug part 2 provided with the retaining element 4. In the area of ​​the respective axial webs 149, 249 and 150, 250, the retaining element body 44 is tongue-shaped and extends as a retaining arm 140 or 141, provided with the aforementioned free end 240 or 241, in the longitudinal and axial directions of the retaining element body 44, respectively. The two retaining arms 140, 141 and the two retaining arms 42, 43 with their outwardly facing locking lugs 40, 41 are arranged alternately around the circumference of the retaining element 4.The two retaining arms 140, 141 each have a locking lug 146, 147, which, however, are directed inwards towards the receiving section 20 of the connector part 2 (see in particular . Figures 2g , 5g , 19 The locking lugs 146, 147 are arranged at the ends of the retaining arms 140, 141, i.e., at the free ends 240, 241 of the two retaining arms 140, 141. The retaining arms 140, 141 are radially deflectable at their free ends 240, 241 relative to the retaining element 4 to engage a locking surface or a locking shoulder or locking element of the connector part. The locking lugs 146, 147 engage a correspondingly shaped shoulder or element on the outside of the receiving section 20 of the connector part 2 (see, for example, Figure 3g ). As in Figure 3gAs can be seen, the locking lugs 146, 147 of the two retaining arms 140, 141 engage in the corresponding grooves or flattened sections on the circumference of the receiving section 20 of the connector part 2 and are supported in and on its surface in the pull-off direction of the sleeve part 3 from the connector part 2 at a respective shoulder 26, 27 of the connector part 2, which delimits the receiving section 20, or at a respective shoulder 206, 207 of the connector part 200 (see also Figures 7, 7a , 8, 8a However, a certain degree of axial mobility or movement of the retaining element 4 relative to the plug part 2 or on its receiving section 20 remains.

[0032] The two retaining arms 140, 141, with their inwardly facing locking lugs 146, 147 for securing them to the plug part 2 or its receiving section 20, and the two retaining arms 42, 43, with their outwardly facing locking lugs 40, 41 for securing them to the sleeve part 3, are arranged alternately around the circumference of the retaining element 4, offset from each other by 90°. The opposing retaining arms 140, 141 are fixed to the edge 47, and the two opposing retaining arms 42, 43 are fixed to the edge 148. The free ends 240, 241 of the two retaining arms 140, 141 extend almost to and terminate at a distance from the edge 148, positioned between the two fixed ends 242, 243 of the two adjacent retaining arms 42, 43.The free ends 142, 143 of the two retaining arms 42, 43 extend almost to the and end at a distance from the edge 47, arranged between the two fixed ends 244, 245 of the two adjacent retaining arms 140, 141, as can be seen in particular from Figures 11k and 11l.

[0033] At least the retaining arm 140 has a through-opening 144 in the area between the two axial webs 149, 249, which is designed in the form of a small window. The locking element 51 of the radially insertable locking element 5 can engage in this through-opening 144 and latch onto the edge surrounding the through-opening 144, or, in the pre-assembly position, it can rest against the outside of the retaining arm 140 next to the through-opening 144. For this purpose, the locking element 51 has a locking lug 52 at its end. The position of the locking lug 52 resting on the outside of the retaining arm 140 next to the through-opening 144 forms a transport lock to prevent the radially insertable locking element 5 from being unintentionally inserted into a fully inserted position.In the position inserted into the through-opening 144, the locking lug 52 can engage with the edge surrounding the through-opening 144 and secure the locking element 51, and thus the radially pluggable locking element, against unintentional release from the locked position. Furthermore, in this position, the retaining arms 42, 43 of the retaining element 4 are prevented from radially moving towards the connector part, since the radially pluggable locking element 5 engages the retaining arms with locking sections 153, 154. The locking sections 153, 154 are particularly well suited to the... Figure 14b , 14d and 14g to be removed. If the locking lug 52 rests on the outside of the retaining arm 140 next to the through-opening 144, the locking sections 153, 154 of the radially insertable locking element 5 do not engage behind the retaining arms 42, 43 of the retaining element 4 (see e.g. Figure 2d). The retaining arms 42, 43 are thus radially freely movable in this pre-assembly position of the radially pluggable locking element 5 to engage in a snap-fit ​​manner with the corresponding locking opening 35, 36 of the sleeve part 3.

[0034] The tongue-shaped locking element 51 with the locking lug 52 arranged at the end can be particularly well attached to the Figure 14b , 14d, 14f to 14l extract. How in particular the Figure 14b and 14e The locking element 51 is slightly curved in order to support itself without applying a pressure force through the sleeve part 3 next to the through-opening 144 on the outside of the retaining arm 140.

[0035] The locking element 51 also serves for the dual verification of whether the radially pluggable locking element 5 has moved completely or sufficiently completely into its locking position on the retaining element 4. This dual verification checks the position of the locking element 51 and the radial mobility of the retaining arms 42, 43 that interact with the radially pluggable locking element 5. For the radially pluggable locking element 5 to be inserted into its end position, the radially projecting section 34 or the edge 32 of the sleeve part 3 must position the locking element 51, or its end-facing, nose-shaped detent section 52, in front of the through-opening or window 144. Furthermore, the retaining arms 42, 43 must be fully deflected and engage in the window or detent openings 35, 36. This allows the insertion state of the radially pluggable locking element 5 to be determined.

[0036] How the Figures 14a to 14l The radially insertable locking element 5, which can also be easily removed, is U-shaped in plan view and has two opposing legs 53, 54 and a transverse section 55 arranged between them. The tongue-like locking element 51 is arranged along the transverse section 55, projecting approximately perpendicularly from it. It extends into the inner area of ​​the U-shaped radially insertable locking element 5, which is spanned between the two legs 53, 54. As shown, the transverse section 55 can be provided with a knurled surface 155 on its outer side for improved, non-slip gripping. To protect the tongue-like locking element 51 and as spacers, as well as for support, guidance, and to prevent rotation, two cams 56, 57 are provided to the left and right of the locking element 51, which in particular Figures 14c , 14d, 14f and 14gcan be removed particularly easily. The two cams 56, 57 adjacent to the locking element 51 serve in particular to protect the locking element 51 against accidental buckling or breakage when the radially insertable locking element 5 is not fully inserted onto the retaining element 4 and additionally support the radially insertable locking element 5, in particular against twisting.

[0037] The radially pluggable locking element 5 further has a projecting, partially stepped anti-capture section 156, 157 at each end of its two legs 53, 54. This section engages positively with at least one correspondingly shaped section on the retaining element 4; for the fully plugged-in state of the radially pluggable locking element 5, this is particularly important. Figure 4, 4b and 17e to be seen. According to Figure 4dIt can be seen that in the fully inserted position of the radially insertable locking element 5, the anti-capture sections 156, 157 are rounded on the outside in such a way that a uniform end surface is formed on the outside of the retaining element 4. If the radially insertable locking element 5 is in an incomplete insertion position, in particular in the pre-assembly position as shown in the Figures 1a to 3g and 19 As shown, the anti-loss sections 156, 157 interlock positively with the respective retaining arm 42, 43 in the area of ​​its respective actuating element 45, 46. This prevents or hinders the removal of the radially pluggable locking element 5 from the retaining element 4, so that the anti-loss sections 156, 157 form a loss-prevention device for the radially pluggable locking element 5 on the retaining element 4 (see also Figure 19 ).

[0038] The two legs 53, 54 of the radially pluggable locking element 5 further exhibit, as shown in particular by the Figures 14a to 14c , 14e, 14f as well as 14i, 14j and 14l Each of the following components can be removed: a projecting guide rib 158, 159. This guide rib serves to guide the radially pluggable locking element 5 in a straight line during its movement in the radial plugging process. The projecting guide ribs 158, 159 accordingly engage in a form-fitting manner with correspondingly shaped surfaces or shoulders of the retaining element 4, as can be seen in particular in the enlarged view of the connector 1 in [reference missing]. Figure 19 can be seen from this.

[0039] In Figure 1The radially pluggable locking element 5 is arranged in a pre-assembled position on the retaining element 4, with its two legs 53, 54 engaging between the actuating elements 45, 46 and the bead-like projecting end edge 47. Both the retaining element body 44 in the area of ​​its bead-like projecting end edge 47 and the two legs 53, 54 of the radially pluggable locking element 5 have projecting and recessed sections, which are designed to be oppositely oriented on the retaining element 4 and the radially pluggable locking element 5 and can therefore interlock. This is particularly important for the 2D figures , 3d and 14d to be seen. In the pre-assembly position of the radially pluggable locking element 5 on the retaining element 4, the retaining arms 42, 43 of the retaining element are not yet blocked. This is particularly important for the Figure 1 and 1fThe pre-assembly position of the radially pluggable locking element 5 on the retaining element 4 is therefore a release position with regard to the mobility of the retaining arms 40, 43 of the retaining element 4.

[0040] The plug part 2, pre-assembled with retaining element 4 and pluggable locking element 5, is, as shown in the Figures 2 to 2g As shown, the sleeve part 3 is pushed onto the connector. The radially pluggable locking element 5 remains in the pre-assembly position, in which the retaining arms 42, 43 remain freely movable in the radial direction of the connector part 2. Accordingly, when the sleeve part 3 is pushed onto the connector part 2, which is provided with the retaining element 4 on its receiving section 20, the two opposing retaining arms 42, 43 are pressed radially towards the receiving section 20 of the connector part 2 with its sleeve section 31. This is particularly important because Figure 2fto be removed. As the sleeve section 31 crosses the locking lugs 40, 41, it presses the retaining arms 42, 43, on which the locking lugs 40, 41 are arranged, radially towards the receiving section 20 of the connector part 2. In this process, the actuating elements 45, 46 also move radially towards the connector part or retract, so that they protrude less far beyond the outer extent of the retaining element body 44 than in the pre-assembly position, which is shown in Figure 1 This is shown in particular by comparing the Figures 2 and 1can be removed. Thus, it is visually and, if necessary, also tactilely apparent when running your hand over it that an incomplete insertion of plug part 2 and socket part 3 has occurred. The incompletely inserted radially pluggable locking element 5 indicates an unchecked insertion position. The radially pluggable locking element 5 protrudes beyond the outer circumference of the retaining element 4. If pressurized medium were to be sent through the connector 1 in this position, the plug part and socket part would sooner or later separate. For safe use of the connector 1, however, a complete insertion of the plug part and socket part is required, which can be checked via the radially pluggable locking element, as described above.

[0041] In the Figure 2 to 2gIn the not yet fully inserted position of plug part 2 and socket part 3 shown, a sealing ring or O-ring 22 is located on an end section of plug part 2 in a circumferential groove there, which is inserted first and therefore deep into the socket section 31 of the socket part 3, sealing against the inner surface of the socket section 31 in this area, as is particularly well shown. Figure 2f and 2g can be removed. It is particularly evident there that the plug part 2 is not yet fully inserted into the sleeve part 3, since the locking lugs 40, 41 cannot yet engage in the locking openings 35, 36 of the sleeve section 31 of the sleeve part 3.

[0042] The fully inserted end position of plug part 2 and socket part 3 is shown in the Figures 3 to 3gThis is shown visually and haptically, particularly by the actuating elements 45, 46, which again project radially far beyond the surface of the retaining element 4. As shown especially in the Figures 3 and 3f As can be seen, the locking lugs 40, 41 are in a locked position in the two locking openings 35, 36 in the sleeve section 31 of the sleeve part 3. The locking lugs 40, 41 bear against the locking openings 35, 36 and thus lock the assumed locking position of the connector part with the attached retaining element 4 and sleeve part 3. Since the sleeve section 31 no longer presses radially against the locking lugs 40, 41 and thus the retaining arms 42, 43, these can return to the initial or pre-assembly position, as they are also in the Figures 1 to 1fAs shown, they rebound so that the actuating elements 45, 46 project radially far outwards again beyond the surface of the retaining element body 44 arranged adjacent to the actuating elements 45, 46. This is particularly relevant to the Figures 3 and 3f to be removed. The locking connection of the locking lugs 40, 41 in the locking openings 35, 36 of the sleeve section 31 of the sleeve part 3 can be released by applying a radial pressure towards the plug part 2, as indicated by arrows P1 and P2. After the locking lugs 40, 41 have been threaded and locked into the locking openings 35, 36 of the sleeve part 3, the retaining element 4, which is attached to the plug part 2, is held securely on it and the insertion position of plug part 2 with retaining element 4 and sleeve part 3 is secured or locked.

[0043] How in particular 3D figureWhen the radially pluggable locking element 5 can be removed, it remains in the pre-assembly position and is therefore not further inserted into the space between the actuating elements 45, 46 and the bead-like projecting end edge 47 of the retaining element 4. The additional locking or locking of the plug connection between the socket part and the plug part with the retaining element 4 attached thereon, exerted by the radially pluggable locking element 5, is in the plug-in state according to Figure 3 to 3g Therefore, it is not yet effective. The radially pluggable locking element 5, as a locking device, is only effective in the pluggable state after Figure 4 to 4g effective. As can be seen in particular in the cross-sectional view along line CC from Figure 4b in Figure 4dThe two legs 53, 54 of the radially pluggable locking element 5, with their respective locking sections 153, 154, engage behind the two retaining arms 42, 43 of the retaining element 4. Furthermore, the tongue-like locking element 51 engages with its locking lug 52 in the through-opening 144 in the retaining arm 140 of the retaining element 4, and the two cams 56, 57 flanking the locking element 51 bear against the surface of the retaining arm 140. The locking lug 52 of the locking element 51 can bear against, in particular, the outside of the receiving section 20 of the plug part 2, as already described and as is particularly evident. Figure 4gcan be removed. Since the radially pluggable locking element 5 rests tightly, closely, or form-fittingly against the outside of the connector part 2 in its plugged-in end position, the end position of the plugging process of the radially pluggable locking element 5 can be determined or checked not only visually but also haptically. As can be seen in particular from the Figures 4 and 4e as well as being able to be removed from 4f, the actuating elements 45, 46 continue to project beyond the surface of the retaining element 4, in particular the bead-like projecting end edge 47 of it, whereby the plug connection between plug part and socket part can be released by applying pressure in the direction of arrows P1 and P2 in the plugged state. Figure 4 to 4g This is not possible because it is prevented by the radially pluggable locking element 5, which is moved into its end position.

[0044] How especially the Figures 3g and 4gcan be extracted, as well as the Figures 3f and 4f , a gap may still remain between the front side of the connector part 2, i.e., the section of the connector part that is sealed against the inside of the sleeve section 31 by the O-ring 22, and the shoulder 37 in the sleeve section 31, which in the Figures 3g and 4g shown with a1. In the Figure 2g and 2f In contrast, a denotes the distance of the front of the plug part 2 from the inside of the sleeve section 31, which results from the unlatched, i.e. only partially inserted, position of the plug part and sleeve part.

[0045] The Figures 5 to 5gFigure 1 also shows the connecting connector 1, on the one hand with the end position of the locking of socket part 3 and plug part 2 with the retaining element 4 attached thereto, and on the other hand with the end position of the radially insertable locking element 5, which secures the locking state of socket part 3 and plug part 2 provided with retaining element 4. In contrast to the embodiment according to the Figures 1 to 4g Is the sleeve part 300 after Figure 5 to 5g The socket part 300 is designed as a machined part, particularly made of metal, and has no mandrel section at its end. Instead, the socket part 300 is provided with a small mounting stud 301, for example, for connection to a pipeline. A connection to a pipeline or a unit is thus possible via the mounting stud 301. In cross-section, the mounting stud 301 is particularly well suited to Figures 5f and 5gto be removed. For connection to a pipeline, a unit, a machine, etc., different configurations of the connector 1 can be provided, such as a socket section, a mandrel section, a threaded section, etc. Two coupling parts can also be provided on the two sides / ends of the connector, or of the socket section and / or the plug section, or of a connection in or on a machine to which the connector is to be connected.

[0046] The socket part 300, like the socket part 3, has a socket section 302, which, however, instead of the locking openings 35, 36 of the socket section 31 of the socket part 3, has an in-wall locking groove 303 with a locking surface 304. This is also particularly well suited to the Figures 5f and 5gto be removed. The locking lugs 40, 41 on the retaining arms 42, 43 of the retaining element 4, which in turn is arranged on the connector part 2, engage in the locking groove 303, bearing against the locking surface 304. Accordingly, the two actuating elements 45, 46 also project beyond the surface of the sleeve section 302 or the bead-like projecting end edge 47 of the retaining element 4 on the connector part 2, as shown by the Figures 5c , 5e and 5f can be seen particularly well, as can be seen in the perspective view of connector 1 in Figure 5 As in Figure 5dAs shown, the two legs 53, 54 of the radially pluggable locking element 5 engage behind the two retaining arms 42, 43 with their locking sections 153, 154, thus additionally securing the end position of the plug connection between socket part 300 and plug part 2 with the retaining element 4 attached thereto. The socket part 300 can, for example, be made of at least one metal, such as, in particular, aluminum, brass, steel, or an alloy, such as an aluminum alloy. In contrast, the socket part 3, which is provided with the pin section 30, can, for example, be made of a plastic material. Likewise, the socket part, in both embodiments, can be made of at least one plastic material and / or at least one metal. The plug part 2 can be made of either plastic material or a metal, such as aluminum or an aluminum alloy.The choice of material for the plug and socket parts can depend on the specific application; in particular, the plug and socket parts may be made of the same material or of different materials, especially plastic and / or metal. The retaining element can also be made of one or more plastic materials and / or one or more metals.

[0047] In the locked end position of connector part 2 with the retaining element 4 and sleeve part 300 attached thereto, at least in the embodiment shown, a gap a2 remains between the front side of connector part 2, wherein the O-ring 22 on the connector part again serves to seal the connector part against the inner surface of the sleeve section 302, and a shoulder 306 in the sleeve part 300, as Figure 5g as well Figure 5f and Figure 12a can be extracted.

[0048] The Figures 6 to 6gThe figures show the connector 1 with the sleeve part 3 not yet attached to the plug part 2, but the radially insertable locking element 5 is already inserted into its final position, i.e., fully inserted, into the retaining element 4. Accordingly, the retaining arms 42, 43 are prevented from allowing any substantially radial deflection towards the plug part 2. Therefore, actuation of the actuating elements 45, 46 is not possible, as they are prevented from moving by the legs 53, 54 of the radially insertable locking element 5 and are thus blocked. This is particularly evident in the cross-sectional view in Figure 6dRemove. Sliding and locking the sleeve part 3 with its sleeve section 31 onto the plug part 2 with the attached retaining element 4 is therefore not possible, because the locking lugs 40, 41 cannot move radially inwards towards the plug part 2, thus cannot retract, in order to slide inside the sleeve section 31 far enough to align with the locking openings 35, 36 in the sleeve section 31 of the sleeve part 3 and engage in a locking manner. A locking connection between the plug part with the retaining element and the sleeve part is therefore not possible when the radially insertable locking element 5 is inserted, i.e., brought into its final position. The fully inserted state, i.e., the final position of the radially insertable locking element 5 on the plug part 2, or...The retaining element 4 can be easily identified both visually and by touch, thus indicating incorrect assembly of the radially pluggable locking element 5, which prevents the plug part and socket part from engaging. To enable the socket part and plug part with the locking element attached to them to be plugged together and engaged, the radially pluggable locking element 5 must be released from its end position and, for example, inserted into the position shown in Figures 1 to 1g and . 19 The position shown will be spent.

[0049] The figures described above show straight plug parts and straight socket parts. In contrast, the Figures 7, 7a and 8, 8a Angled connector parts 200. In the Figures 9, 9aFigures 10 and 10a each show straight connector parts 2. In all connector parts 2 and 200, the receiving section 20 or 201 is polygonal to provide an anti-rotation feature for the retaining element 4 attached there. However, it is also possible to design the connector part 2 or 200 with a round cross-section in the area of ​​its receiving section 20 or 201. In particular, if an anti-rotation feature is not required there, or if another type of anti-rotation feature is provided, the connector part can have a completely round cross-section. Hybrid forms of a round cross-section and flattened sections, or at least a flattened section, are also possible along the circumferential surface, especially of the receiving section 20 or 201 of the connector part 2 or 200.

[0050] Regarding the plug part 200 after Figure 7 and the plug part 2 Figure 9On each of the four surfaces of the respective polygonal receiving section 20 or 201, projecting pin elements 23 or 202 are provided. The projecting pin elements 23 or 202 serve as a pressure lock when pressure is applied inside the connector part 2 or 200, i.e., when pressurized medium flows through it. For pressure locking, the projecting pin elements 23, 202 are positioned outside a respective opening 145 in the retaining arms 42, 43 by means of axial displacement of the retaining element 4 relative to the connector part 2. This prevents radial movement of the retaining arms 42, 43, as shown in Figures 17d and 17eAs shown, axial play is provided for the retaining element 4 on the receiving section 20 of the connector part 2 such that it is at least sufficiently far from the opening 145 for the insertion of the at least one projecting pin element 23, 202, so that the retaining arms 42, 43 are not in a release position when the projecting pin element 23, 202 is outside the opening 145. Due to the axial displacement between the connector part 2 and the retaining element 4 that occurs when pressure is applied inside the connector 1, the projecting pin elements 23, 202 are displaced from the area of ​​alignment with the openings 145 and thus radially lock the retaining arms 42, 43. Actuation of the retaining arms 42, 43 to release their locking lugs 40, 41 from the locking in the locking openings 35, 36 in the sleeve part 3 is thus prevented in this position.Only in the non-axially displaced position of retaining element 4 and connector part 2 is it possible for the protruding pin elements 23, 202 to be inserted into the openings 145, and thus for the retaining arms 42, 43 to be actuated only without applied media pressure inside the connector 1. The openings 145 in the two retaining arms 42, 43 can in particular allow the . Figure 13e , 13h, 13i and 13l can be taken from the Figures 16a to 16e , in particular 16d, such a released pressure lock is shown, while the Figures 17a to 17eThe diagram shows a blocked pressure locking mechanism in which the projecting pin elements 23 and 202 are unable to engage in the respective opening 145 in the two retaining arms 42 and 43. For a pressure locking mechanism, axial movement of the retaining element relative to the connector part is thus provided. If no media pressure is present inside the connector, the connector part can be released from the socket part. This can be achieved by manually inserting the connector part 2 fully, i.e., to its furthest possible position inside the socket part, thereby manually releasing the locking lugs 40 and 41 of the retaining arms 42 and 43 from their engagement in the locking openings 35 and 36, or a shoulder or undercut surface serving as a locking surface 304 and 405 in the socket part.

[0051] As can be seen from the Figures 16a to 16e and 17a to 17eThis also results in the radially insertable locking element 5 not yet being in its final position, and thus protruding noticeably laterally beyond the surface, particularly of the plug part, but also of the socket part. If a pressure locking mechanism is used, the plug part 2 and the socket part 3 are sufficient. The radially insertable locking element 5 can be omitted in this case.

[0052] Apart from their angled shape, connector parts 2 and 200 differ according to... Figures 7, 7a , 8, 8a, 9, 9a and 10, 10a not, since all plug parts are designed for the expansion of pipe or hose lines in particular and accordingly each have a mandrel section 21 or 203.

[0053] Like the plug parts 2 to 200 in the Figures 7 to 10aHowever, as can also be seen from the other connector parts in the figures already described above, these each have not only a receiving groove 24 or 204 for receiving the sealing ring or O-ring 22 at one end, but also between the receiving section 20 or 201 and the respective mandrel section 21 or 203, a respective attack opening or two opposing attack openings 25, 205. These serve for gripping, for example, by a robot arm to accomplish automated assembly of the connectors 1. Instead of such attack openings 25, 205, other gripping surfaces can also be provided which can be grasped or attacked by robots during automated assembly in order to, on the one hand, remove the respective connector part 2 or 203.200 to be provided with the respective retaining element 4 and, on the other hand, to enable correct mounting of the retaining element 4 on the plug part, as well as subsequently correct mounting of the radially pluggable locking element 5 on the retaining element 4 and, if necessary, also of the respective sleeve part 3 or 300 on plug part with retaining element and radially pluggable locking element.

[0054] The Figures 11, 11a and 12, 12aFigure 3 shows the sleeve part 3 and the sleeve part 300 separately. The end-mounted fastening stud 301 is clearly visible on the sleeve part 300, as is the locking groove 303 inside the sleeve section 302 with its locking surface 304 for engaging a respective locking lug 40 or 41 of the retaining arms 42, 43 of the retaining element 4, which is mounted on the respective connector part 2 or 200. A comparison of the sleeve part 3 with the sleeve part 300 also shows that the sleeve part 300, which is machined from a single metal component, has no radially or axially projecting sections at its upper edge 305, thus preventing any engagement with corresponding grooves or webs, such as the axial webs 150, 250.This is primarily due to the fact that no locking openings in the form of window openings 35, 36 are provided, which the locking lugs 40, 41 must engage as precisely as possible to cause the locking lugs 40, 41 to lock there. Instead, a locking groove 303 is provided, which is located circumferentially inside the sleeve section 302, so that the respective position of the locking lugs 40, 41 along the locking groove 303 is freely selectable with respect to its circumferential extent. This differs, as already explained above, from the sleeve part 3 provided with the window openings or locking openings 35, 36, in which both the axially projecting section 33 and the radially projecting section 34 ensure correct positioning of the sleeve part 3 on the connector part 2 or connector part 200 with the retaining element 4 attached thereto.

[0055] The Figures 18a to 18dFigure 1 shows the connector 1, in which the plug part 2 is provided at its end with a sensor 210 instead of a pin section or other connection section. The sensor 210 is plugged onto or materially connected to the plug part 2 and has an electrical and / or data connection 211 at its end, as shown in particular in the top view of this in Figure 2. Figure 18d can be removed. The sensor 210 can be connected to an electrical power source and / or a data acquisition and / or processing unit (not shown) via the electrical and / or data connection 211. The sleeve part 3 can then be attached to the opposite end of the connector part 2, which is provided with the receiving section 20 with the retaining element 4 attached thereto and the radially pluggable locking element 5 attached to this in the pre-assembly position, as described above. Especially in the Figures 18b, 18cThe locking element 51 with end-side locking lug 52 is particularly visible, which rests on the outside of the retaining arm 140 and can be actuated by the sleeve part 3 or its radially projecting section 34 and directed into the opening 144 in the retaining arm 140.

[0056] The Figures 15a to 15d The illustrations show, in the style of a modular system, the various types of connector parts and socket parts that can be combined with each other as desired. A retaining element 4 is provided for locking the connector part and socket part together, and a radially insertable locking element 5 is attached to the retaining element 4 for additionally locking the locked position of the connector part with the retaining element and socket part. A sealing ring or O-ring 22 is also shown for sealing the connector part 2 or 200 in the respective socket part.

[0057] Instead of the previously described sleeve parts 3 with mandrel section 30 and sleeve part 300 in the form of a machined part, the following are also included in the Figures 15a to 15d The embodiment of a socket part 400 with a hexagonal section 401 is shown, wherein the socket part 400 is intended for screw connection to a pipeline or a unit, the hexagonal section allowing for gripping and holding during screwing on of the socket part 400. For connection to a pipeline, the socket part 400 has a connecting section 402. A connection to the plug part 2 or 200 with a retaining element 4 attached to it is possible via a socket section 403. The socket section 403 also has, corresponding to the socket section 302 of the socket part 300, a locking groove 404 with a locking surface 405 for locking the locking lugs 40 or 41 onto the retaining arms 42 or 43 of the retaining element 4.

[0058] Thus, for example, the three design variants of sleeve parts 3, 300 or 400 can optionally be combined with one of the design variants of plug parts 2 or 200. In the Figures 15a to 15d The connector parts 2 and 200 are shown without the projecting pin elements 23 and 202, respectively. These can, however, also be arranged on the respective receiving sections 20 and 201 to provide a pressure-locking mechanism.

[0059] In Figure 15cThe pre-assembly position of the radially pluggable locking element 5 on the retaining element 4 is particularly well shown in the perspective view. Here, the locking element 51, with its locking lug 52, is still located on the outside of the retaining arm 40 of the retaining element 4, adjacent to, but not yet engaged with, the through-opening 144 there. It is also evident that the radially projecting section 34 engages the locking element 51 and pushes it in the insertion direction of the sleeve part 3, towards the plug part 2, thereby pressing the locking lug 52 into a position aligned with the through-opening.In the latter position, the radially insertable locking element 5 can be pushed into its end position, provided that the retaining elements 42, 43 are fully deflected, with the locking element 51 lying in the through-opening 144 and the locking lug 52 engaging inside the retaining element 4 on the underside of the retaining arm 40 against the edge surrounding the through-opening 144, thus holding itself there on the inside of the retaining arm 40 and preventing the locking element 51 with locking lug 52 from being unintentionally pulled out. This can be seen in [reference missing]. Figure 15c also the arrangement of the leg 53 adjacent to the retaining arm 43 with locking lug 41 and actuating element 46.

[0060] By providing the radially insertable locking element 5, an additional locking function for the retaining arms 42, 43 of the retaining element 4 is possible. This offers advantages not only with regard to forces acting in the pull-out direction of the plug part and socket part, but also with regard to lateral load forces on the inserted connector, resulting in an even better and more secure plug connection.

[0061] The radially pluggable locking element 5, or locking device, thus has as its main function the securing of the plugged connector and socket against unintentional disconnection. Furthermore, a plug-in check is performed in two directions: firstly, by ensuring that the radially pluggable locking element or locking device can only be actuated when the connector is fully inserted into the socket; and secondly, by preventing the connector from being plugged in when the radially pluggable locking element or locking device is in the locked position. A locking function is also provided to prevent the locking element from being unintentionally inserted into the opening in the retaining element. In addition, the plug-in status is checked twice: once in the area of ​​the retaining arms and again with respect to the tongue-like locking element and its end-mounted, tab-shaped detent section.Furthermore, the radially pluggable locking element or locking device provides support for the plug part, socket part, and retaining element. Visual and / or tactile feedback can also be used to determine the correct insertion position of the plug part and socket part. In addition, the radially pluggable locking element or locking device features a retaining mechanism to ensure it is securely held on the retaining element, particularly in an initial pre-assembly position.

[0062] These connectors are specifically designed for hoses and / or pipes. Each connector has at least one socket section and at least one plug section, with the plug section being either pluggable or inserted into a socket section of the socket section.A retaining element is provided for releasably locking the plug part into the socket part, wherein the retaining element can be mounted or is mounted on a receiving section of the plug part in a captive manner and has at least one section that is radially expandable and includes at least one retaining arm that is provided with at least one externally projecting locking lug, wherein the retaining arm is spring-elastically movable in the radial direction with respect to the plug part in order to engage the at least one locking lug on at least one locking surface or locking opening of the socket part and to be able to release it from the locking position, wherein at least one second locking device is provided for locking and locking the locking position of the plug part, locking element and socket part. Reference symbol list

[0063] 1 Connector 2 Plug part 3 Socket part 4 Retaining element 5 Radially pluggable locking element 20 Receiving section 21 Mandrel section 22 Sealing ring / O-ring 23 Projecting pin element 24 Receiving groove 25 Grip opening 26 Shoulder 27 Shoulder 30 Mandrel section 31 Socket section 32 Upper edge 33 Axially projecting section 34 Radially projecting section 35 Window opening / latching opening 36 Window opening / latching opening 37 Shoulder 40 Latching lug 41 Latching lug 42 Retaining arm 43 Retaining arm 44 Retaining element body 45 Actuating element 46 Actuating element 47 Bead-like projecting end edge 48 Projecting section 49 Radial section 50 Groove / recess 51 Locking element 52 Latching lug 53 Leg 54 Leg 55 Cross section 56 Cam 57 Cam 140 Retaining arm 141 Retaining arm 142 Free end 143 Free end 144 Through opening 145 Opening 146 Detent lug on 140 147 Detent lug on 141 148 Continuous edge 149 Axial web 150 Axial web 153 Locking section 154 Locking section 155 Serration 156 Anti-loss section157 Anti-loss section 158 Guide rib 159 Guide rib 200 Angled connector part 201 Receiving section 202 Projecting pin element 203 Mandrel section 204 Receiving groove 205 Access opening 206 Shoulder 207 Shoulder 240 Free end 241 Free end 210 Sensor 211 Electrical and / or data connection 242 Fixed end 243 Fixed end 244 Fixed end 245 Fixed end 249 Axial rib 250 Axial rib 300 Sleeve part 301 Mounting stud 302 Sleeve section 303 Locking groove 304 Locking surface 305 Upper edge 306 Shoulder in sleeve part 400 Sleeve part 401 Hexagonal section 402 Connecting section 403 Sleeve section 404 Locking groove 405 Locking surface a Distance between front of connector part 2 and shoulder 37 in sleeve part 3 in unlocked position a1 Distance between front of connector part 2 and shoulder 37 in sleeve part 3 in end position a2 Distance between front of connector part 2 and shoulder 306 in sleeve part 300 in end position P1 Pressure force P2 Pressure force

Claims

1. Connector (1), in particular for hose lines and / or pipelines, comprising at least one socket part (3, 300, 400), at least one holding element (4), at least one locking device and at least one plug part (2, 200), wherein the plug part (2, 200) is able to be inserted or has been inserted into a socket portion (31, 302, 403) of the socket part (3, 300 400) and wherein the at least one holding element (4) is provided for releasably holding the plug part (2, 200) in the socket part (3, 300, 400), wherein the plug part (2, 200) is provided with and connected to the holding element (4), wherein the holding element (4) is mounted on a receiving portion (20, 201) of the plug part (2, 200) in such a manner that it is secured against loss, and wherein the holding element (4) has at least one holding arm (42, 43) with at least one externally protruding latching lug (40, 41), wherein the at least one holding arm (42, 43) has a free end (142, 143) and an end (242, 243) fixed to a holding element body (44) and is resiliently movable in a radial direction with respect to the plug part (2, 200) in order to latch the at least one latching lug (40, 41) on at least one latching surface (304, 405) or a latching opening (35, 36) of the socket part (3, 300, 400) and to release it therefrom, and wherein the at least one locking device is provided for securing the latched state of the plug part (2, 200) and the socket part (3, 300, 400) and for indicating incorrect assembly thereof, wherein the at least one locking device cooperates with the at least one holding element (4), characterised in that the at least one locking device is a radially insertable locking element (5) which cooperates with the holding element (4) in the region of the at least one holding arm (42, 43) thereof and is movable radially with respect to the holding element (4), or the plug part (2, 200), and the socket part (3, 300, 400) and which is pre-assembled on the holding element (4) and is displaceable from a pre-assembled position into a locking position.

2. Connector (1) according to claim 1, characterised in that the radially insertable locking element (5), when seen from above, is U-shaped with two legs (53, 54) and a transverse portion (55) arranged therebetween, wherein at least one portion of the legs (53, 54) or on the legs serves to engage between the free end (142, 143) of the at least one holding arm (42, 43) and the plug part (2, 200).

3. Connector (1) according to claim 2, characterised in that the legs (53, 54) of the radially insertable locking element (5) have such a shape and are at such a distance from one another that, when they are fully fitted onto the holding element (4), they are in contact with two mutually opposite holding arms (42, 43) in order to hold them radially in a spaced-apart position relative to the plug part (2, 200), in particular the legs (53, 54) have blocking portions (153, 154) for engaging in a blocking manner behind the holding arms (42, 43) of the holding element (4).

4. Connector (1) according to either claim 2 or claim 3, characterised in that the cross section (55) of the radially insertable locking element (5) is provided with at least one protruding blocking element (51) which is able to engage or engages in at least one opening (144) in the holding element (4), in particular the blocking element (51) is lug-shaped and has an end fastened to the transverse portion (55) or fixed and a free end, wherein the free end is provided at the end with at least one projecting lug-shaped latching portion (52).

5. Connector (1) according to claim 4, characterised in that the blocking element (51) and an edge (32) or a radially projecting portion (34) of the socket part (3, 300, 400) are able to cooperate or cooperate in such a manner that the blocking element (51) can be axially freed by the edge (32) or the radially projecting portion (34) and guided into an opening (144) of the holding element (4).

6. Connector (1) according to claim 4 or 5, characterised in that the lug-shaped latching portion (52) serves to prevent the locking device from being displaced radially into a locking position in which the blocking element (51) engages into the opening (144) in the holding element (4), and to secure the blocking element (51) against independently moving out of, sliding out of or being released from that opening (144).

7. Connector (1) according to any one of the preceding claims, characterised in that the plug part (2, 200), in particular the receiving portion (20, 201) on the plug part (2, 200), is provided with at least one device (23, 202) for pressure locking that cooperates with the holding element (4), which device prevents the holding element (4) from being unlocked when media pressure is present inside the connector (1).

8. Connector (1) according to any one of the preceding claims, characterised in that in the case where the plug part (2, 200) and the holding element (4) are in two-part form, at least one of the two is provided with an anti-rotation means, in particular the plug part (2, 200) is of polygonal form externally in at least one portion (20, 201).

9. Connector (1) according to any one of the preceding claims, characterised in that the socket part (3, 300, 400) has at least one anti-rotation means (33, 34) and / or positioning aid, in particular at least one protruding element (33, 34) and / or at least one surface or shaping that secures against rotation and / or incorrect positioning, and / or in that the socket part (3) consists of at least one plastics material and is provided with the at least one latching opening (35, 36) in the lateral surface or is in the form of a machined part (300, 400), in particular of at least one metal, and is provided with at least one undercut surface as a latching surface (304, 305) for latching of the at least one latching lug (40, 41) of the holding arm (42, 43) of the at least one holding element (4).

10. Connector (1) according to any one of the preceding claims, characterised in that a transport securing position of the locking device (5) is provided, wherein the at least one blocking element (51) prevents the locking device from being able to be brought, in particular pushed, radially into its end position when the plug part (2, 200) and the socket part (3, 300, 400) are not fully inserted.

11. Connector (1) according to any one of claims 4 to 10, characterised in that the locking device is able to be brought fully into its end position only when the blocking element (51) projects into the opening (144) and / or the lug-shaped latching portion (52) of the blocking element (51) is located in the opening (144) and the holding arms (42, 43) of the holding element (4) are radially movable.

12. Connector (1) according to any one of the preceding claims, characterised in that the holding element (4) has an uninterrupted, continuous edge (47, 148) axially on both sides at the ends.

13. Connector (1) according to any one of the preceding claims, characterised in that the plug part (2, 200) is provided with at least one device (23, 202) for pressure locking that cooperates with the holding element (4), which device prevents the holding element (4) from being unlocked when media pressure is present inside the connector (1).

14. Connector (1) according to claim 13, characterised in that the pressure locking device comprises at least one element (23, 202) protruding from the outside of the receiving portion (20, 201) of the plug part (2, 200), in particular at least one protruding pin or at least one protruding elevation, and the holding element (4) comprises at least one opening (145) in at least one of its holding arms (42, 43), in particular for pressure locking the protruding element (23, 202), by displacement of the holding element (4) relative to the plug part (2, 200), is located outside an opening (145) in the holding element (4) in the axial direction of the holding element (4) and hereby blocks a radial movement of the holding arm (42, 43) or of the holding arms (42, 43).

15. Arrangement of a holding element (4) and of at least one locking device for a connector (1) according to any one of the preceding claims, comprising at least one socket part (3, 300, 400) and at least one plug part (2, 200), wherein the plug part (2, 200) is able to be inserted or has been inserted into a socket portion (31, 302, 403) of the socket part (3, 300, 400) and wherein the holding element (4) is able to be mounted or has been mounted on the plug part (2, 200) in order to releasably hold the plug part (2, 200) in the socket part (3, 300, 400), characterised in that the holding element (4) has holding arms (140, 141) with latching lugs (146, 147) that are oriented inwards with respect to the holding element (4) for fixing to a correspondingly shaped shoulder or element on the outside of a receiving portion (20, 201) of the plug part (2) and holding arms (42, 43) with latching lugs (40, 41) that are oriented outwards with respect to the holding element (4) for latching in latching openings of the socket part (3, 300, 400), wherein the at least one locking device is provided for securing the latched state of the plug part (2, 200) and the socket part (3, 300, 400) and for indicating incorrect assembly thereof, wherein the at least one locking device is a radially insertable locking element (5) which cooperates with the holding element (4) in the region of the at least one holding arm (42, 43) thereof and is movable radially with respect to the holding element (4) and is pre-assembled on the holding element (4) and is displaceable from a pre-assembled position into a locking position.