Arrangement with a connecting piece attached to a hose

Abstract

Arrangement (1) with a connecting piece (2) attached to a hose (3), wherein the connecting piece (2) has a coupling part (5) partially inserted into the hose (3) and a connecting part (4) located outside the hose (3), characterized in that a profile is provided on the outer surface of the area of ​​the coupling part (5) located in the hose (3), that a profile element (10) is provided in the area of ​​the coupling part (5) located outside the hose (3), and that an injection material (11) is provided for attaching the connecting piece (2) to the hose (3), which surrounds the profile element (10) in the area of ​​the coupling part (5) located outside the hose (3) and which extends over the adjacent area of ​​the hose (3), wherein the injection material (11) is provided on the outer surface of the hose (3) and on its end face facing the profile element (10).

Description

The invention relates to an arrangement with a connecting nozzle attached to a hose. Such arrangements are used for the transport of gaseous or liquid media. The design of such an arrangement is such that the connection fitting comprises a connector and a coupling part. The coupling part is inserted into the hose and secured, thereby connecting the connector to the hose. The design of the connector is independent of the design of the coupling part and can, in particular, form an interface to external units. An example of such a connector is a plug. The connection fitting generally has a channel running lengthwise through it. A medium contained in the hose is then fed through the channel of the connection fitting to an external unit. A typical application example is the flow of a cooling medium, especially a coolant, through the hose and the connection fitting. This arrangement is used for cooling, in particular, electronic components. Another application example is the guidance of a cleaning medium, in particular a cleaning fluid, which is guided through the hose and the connection nozzle. This arrangement is used for cleaning assemblies, especially optical assemblies. The resulting arrangements can be used in various industrial applications, for example in the automotive sector. Typically, the connector is fixed to the hose simply by pressing the coupling part into the hose. Although this method can be carried out simply and inexpensively, the long-term stability of the connection between the connector and the hose is often insufficient. An even more serious problem is that the interface between the coupling part and the hose is not completely sealed, so that liquid or gaseous medium can escape there, which hinders or even prevents the use of the connection parts in the respective application. It is also known to additionally secure the hose to the coupling part using a clamp. This requires an additional mechanical component, which also increases the assembly effort. Furthermore, a clamp only provides insufficient sealing at the interface between the hose and the coupling part. The invention is based on the objective of providing an arrangement of the type mentioned above in which a long-term stable and tight connection is provided between the connecting nozzle and the hose. The features of claim 1 are provided to solve this problem. Advantageous embodiments and expedient further developments of the invention are described in the dependent claims. The invention relates to an arrangement with a connecting piece attached to a hose, wherein the connecting piece has a coupling part that can be partially inserted into the hose and a connecting part located outside the hose. A profile is provided on the outer surface of the portion of the coupling part located inside the hose. A profile element is provided outside the portion of the coupling part located inside the hose. An injection-molded compound is provided for attaching the connecting piece to the hose. This compound surrounds the profile element in the portion of the coupling part located outside the hose and extends over the adjacent portion of the hose. The injection-molded compound is also present on the outer surface of the hose and on the end face of the hose facing the profile element. The arrangement according to the invention can be used for transporting gaseous or liquid media, wherein, in general, the connecting piece is penetrated in its longitudinal direction by a channel. The medium is then guided through the cavity of the hose and the channel of the connecting piece. To attach the hose to the connector, the hose is pulled onto the coupling part of the connector, causing the flexible hose to widen slightly. To ensure a continuous, trouble-free transport of the medium in the arrangement, it is advantageous if the inner diameter of the hose corresponds at least approximately to the preferably constant inner diameter of the channel of the connection nozzle. According to the invention, the connecting nozzle is connected to the hose by means of an injection-molded compound, which is applied to the arrangement in a spraying process. Initially, the coupling part of the connector is only partially inserted into the coupling part of the hose. To attach the connector to the hose, the injection molding compound is applied to the area of ​​the coupling part lying outside the hose and to the adjacent area of ​​the hose. This not only ensures a firm connection between the coupling part and the hose, but also provides a seal to the outside. According to the invention, a profile is provided on the outer surface of the coupling part located inside the hose. Furthermore, a profile element is provided in the area of ​​the coupling part located outside the hose. The profiling ensures a good mechanical hold of the hose on the coupling part. According to an advantageous embodiment, the profiling of the coupling part has at least one profile structure forming a raised area, which provides mechanical fixation of the hose. In particular, the profile structure is ramp-shaped, the slope of which is smaller in the direction of pulling the hose up to the coupling part than in the opposite direction. In the direction of application, the hose can thus be pulled relatively easily onto the coupling part along the gentle slope of the ramp of the profile structure. However, pulling the hose off the coupling part against the steep slope of the ramp of the profile structure requires considerably more force. The profile element according to the invention lies at a distance from the profile structure and is advantageously designed in the form of a ring-shaped elevation, i.e. the profile element protrudes beyond the advantageously rotationally symmetrical outer surface of the coupling part. It is essential that the hose is only pulled onto the profiling, but not onto the profile element. The injection molding compound is then applied to the area of ​​the outer surface of the hose that is fitted onto the coupling part. In addition, the adjacent exposed part of the coupling part, which also contains the profile element, is overmolded with the injection molding compound, so that the profile element is completely encased in injection molding compound. This significantly improves the hose's grip on the coupling. Additional mechanical elements, such as a clamp, are not required to secure the hose. Furthermore, the injection compound achieves a good sealing effect. In this process, a thermoplastic is advantageously used as the injection material, which, particularly due to its somewhat sticky consistency, develops a good adhesive and sealing effect. The injection sealant not only seals the outer surface of the hose but also the end face and the seams between the hose and the coupling part in the area of ​​the end face of the hose. This effectively prevents the escape of gaseous or liquid media at the end face of the hose. In particular, even with a multi-layered hose, the ingress of gaseous or liquid media between the layers of the hose is prevented, thus preventing swelling of the hose. This is because the sealing injection-molded compound extends not only over the seam between the hose and the coupling part, but also over the entire end face of the hose where the layers of the hose are exposed. According to an advantageous embodiment of the invention, the profile structure or each profile structure has a cross-section that is uniform in the direction of travel. Each profile structure forms a closed structure in the circumferential direction. The profile structures thus form a barrier that prevents the migration of gaseous or liquid media between the hose and the coupling part to a certain extent. According to a further variant of the invention, the profiling forms a continuous channel structure between the coupling part and the hose, which opens at the edge of the hose. Since the channel structure opens at the edge of the hose and forms a continuous structure inside the hose, the entire channel structure can be filled with injection molding compound when the injection material is injected. This not only further improves the hose's grip on the coupling but also seals the area between the hose and coupling with the injection-molded compound. This prevents the gaseous or liquid medium from penetrating between the hose and coupling due to creep. This prevents the medium from escaping and protects the hose from damage. This requires a sufficiently large diameter for the coupling part and, furthermore, flexibility of the hose such that the channels of the channel structure remain clear after the hose is pulled onto the profile structure of the coupling part. Advantageously, the channel structure has at least one channel segment running in the longitudinal direction of the coupling part, which opens at the edge of the hose. In particular, the channel segment runs parallel to the longitudinal axis of the coupling part. Since these channel segments lie in the injection direction of the injection material, they can easily be filled with injection material. In order to achieve a sealing effect over the entire circumference of the coupling part or hose, at least one further channel segment extending in the circumferential direction of the coupling part opens onto the longitudinal channel segment(s). The ring-shaped design of the additional channel segment is particularly advantageous. This results in a branched, interconnected channel structure that advantageously extends over the entire circumference of the coupling part, thus ensuring a flat seal with the injected injection material. This sealing effect can be further increased if several additional channel segments running circumferentially around the coupling part are present and arranged at a distance from each other in the longitudinal direction of the coupling part. This creates a networked channel structure over a large part of the coupling section, so that the injected injection material creates a large-area seal. According to an advantageous embodiment, the channel structure has several channel segments extending in the longitudinal direction of the coupling part that are offset and are connected by at least one further channel segment extending in the circumferential direction of the coupling part. The invention is explained below with reference to the drawings. Fig. 1: First embodiment of the arrangement according to the invention with a connecting piece and a hose. a) Perspective view b) Sectional view Fig. 2a: Detail view of the connecting piece of the arrangement according to Fig. 1. Fig. 2b: Detail view of the connecting piece with injection molding compound of the arrangement according to Fig. 1. Fig. 3: Detail view of the injection molding compound of the arrangement according to Fig. 1. Fig. 4: First embodiment of the arrangement according to the invention with a connecting piece and a hose. c) First section view d) Second section view Fig. 5: Detail view of the connecting piece of the arrangement according to Fig. 4. Fig. 6: Detail view of the injection molding compound of the arrangement according to Fig. 4. Fig. 7: Detail view of the connecting piece with injection molding compound of the arrangement according to Fig. 4. Fig. 8: Second embodiment of the arrangement according to the invention.Fig. 9: Detail of the connection nozzle of the arrangement according to Fig. 8. Fig. 10: Detail of the injection-molded material of the arrangement according to Fig. 8. Fig. 11: Further embodiment of a connection nozzle of the arrangement according to the invention. Fig. 12: Further embodiment of a connection nozzle of the arrangement according to the invention. Fig. 13: Further embodiment of a connection nozzle of the arrangement according to the invention. Figures 1a and 1b show a first embodiment of the arrangement according to the invention. The arrangement 1 according to Fig. 1a, Fig. 1b and all further embodiments consists of a connecting piece 2 and a hose 3. The hose 3 is advantageously designed as a multi-layered, kink-resistant hose. In all embodiments, the connecting piece 2 consists of a connecting part 4 and a coupling part 5. The entire connecting piece 2 is penetrated longitudinally by a channel 6. The channel 6 is shown only in the coupling part 5. The connecting part 4 is not shown in its functional state; in particular, the channel 6 is not shown in this part. The connecting part 4 can, for example, be formed by a plug. The design of the coupling part 5, which serves to connect to the hose 3, is independent of the design of the connecting part 4. The coupling part 5 has an essentially hollow cylindrical shape. The outer surface of the coupling part 5 has a profile. This profile comprises several ramp-shaped profile structures 7 arranged at intervals along the longitudinal direction of the coupling part 5. The slopes of the profile structure 7 at the end facing away from the connecting part 4 are shallower than at the end facing the connecting part 4. In the present case, each profile structure 7 forms a circumferentially closed structure. Adjoining the profile in the direction of the connecting part 4 is a profile element 10, which is formed by a ring projecting upwards from the cylindrical surface. The profile element 10 extends over the entire circumference of the coupling part 5. To attach the hose 3 to the coupling part 5 of the connecting piece 2, one longitudinal end of the hose 3 is pulled onto the coupling part 5, widening it as shown in Figs. 1a and 1b. The hose 3 is pulled onto the coupling part 5 to such an extent that it completely covers the profile and the channel segments 8 open at the open end of the hose 3. However, the area of ​​the coupling part 5 with the profile element 10 is not covered by the hose 3. The profile structures 7 of the profiling, through their ramp structure, form a mechanical safeguard against the hose 3 detaching from the coupling part 5. Since the profile structures 7 of the profiling form circumferentially closed elements, they also form barriers to a certain extent that prevent a gaseous or liquid medium from reaching the end face of the coupling part 5 and the hose 3. To fix the hose 3 to the coupling part 5, a molding compound 11 is injected using an injection molding process (Fig. 1a, Fig. 1b). The molding compound 11 is made of a thermoplastic. The molding compound 11 is injected onto the expanded area of ​​the hose 3 covering the profile and the adjacent exposed area of ​​the coupling part 5. The injection material 11 surrounds the ring-shaped profile element 10, thereby mechanically fixing the injection material 11 in position. The injection material 11 ensures a stable connection between hose 3 and coupling part 5. Since the injection-molded compound 11 is applied specifically to the end face of the hose 3 and the seam between the coupling part 5 and the hose 3 in the area of ​​its end face, the escape of gaseous or liquid media is prevented there, and in particular, it prevents them from penetrating between the layers of the multi-layered hose 3 through creep effects. This prevents swelling of the hose 3 and thus any impairment of the connection between the hose 3 and the coupling part 5. Fig. 2a shows the connecting piece 2 in a close-up view. Fig. 2b shows the connecting piece 2 with injection material 11 in a close-up view. Fig. 3 shows the geometry of the body of the injection material 11, which was injected onto the hose 3 and the coupling part 5, in a single view. In the body of the injection material 11 there is a recess 14 in which the profile element 10 is located. Figures 4, 5, 6 to 7 show a second embodiment of the arrangement 1 according to the invention. This arrangement 1 differs from the arrangement 1 according to Figs. 1, 2 to 3 in that the profile structures 7 are perforated by longitudinally extending channel segments 8, as can be seen particularly in Fig. 5. At the rear end of the profiling, the channel segments 8 are connected by a further annular channel segment 9. The channel segments 8 thus form a continuous channel structure. The profiled section is followed, in the direction of the connecting part 4, by another profile element 10, which is formed by a ring projecting upwards from the cylindrical surface. The profile element 10 extends over the entire circumference of the coupling part 5. To attach the hose 3 to the coupling part 5 of the connecting piece 2, it is again pulled onto the coupling part 5 with one longitudinal end widening, as shown in Figs. 4a and 4b. The hose 3 is pulled onto the coupling part 5 to such an extent that it completely covers the profile and the channel segments 8 open at the open end of the hose 3. However, the area of ​​the coupling part 5 with the profile element 10 is not covered by the hose 3. The profile structures 7 of the profiling, through their ramp structure, form a mechanical safeguard against the hose 3 detaching from the coupling part 5. To fix the hose 3 to the coupling part 5, a sprue 11 is again injected using an injection molding process (Fig. 4a, Fig. 4b). The sprue 11 is injected onto the expanded area of ​​the hose 3 covering the profiling and the adjacent, exposed area of ​​the coupling part 5. The injection material 11 surrounds the ring-shaped profile element 10, thereby mechanically fixing the injection material 11 in position. The injection material 11 ensures a stable connection between hose 3 and coupling part 5 and seals the joints between hose 3 and coupling part 5. In this case, the injection material 11 is not only applied to the outside of hose 3 and coupling part 5. Rather, the injection material 11 is also injected into the channel structure. Since channel segments 8 and 9 form a continuous channel structure, the injection material 11 is injected into the entire channel structure. The injection material 11 is introduced into the channel structure via the openings of channel segments 8 at the edge of hose 3. By injecting the injection material 11 into the channel structure, the internal interface between coupling part 5 and hose 3 is also sealed. This prevents the gaseous or liquid medium from escaping from hose 3 to the outside due to creep effects. Fig. 6 shows a close-up view of the geometry of the injection material body 11, which was injection-molded onto the hose 3 and the coupling part 5. Fig. 7 shows the injection material body 11 on the coupling part 5. The body of the injection material 11 has longitudinal webs 12 extending along the coupling part 5, which are injected into the channel segments 8. Furthermore, the body has a ring segment 13, which is injected into the further channel segment 9. Additionally, the body of the injection material 11 has a recess 14 in which the profile element 10 is located. Figures 8, 9, 10 to 11 show a further embodiment of the arrangement 1 according to the invention. This arrangement 1 differs from the embodiment shown in Figures 4, 5, 6 to 7 only with regard to the design of the channel structure. In this case, the channel structure is formed by channel segments 8, which are connected by three further annular channel segments 9, with two of the channel segments 9 being located between adjacent profile structures 7. Figures 11, 12 to 13 show further variants of the coupling part 5 for the arrangement 1 according to the invention. The coupling parts 5 of Fig. 11, Fig. 12 to Fig. 13 differ only in terms of the design of the profiling and thus in terms of the design of the channel structure from the embodiment of Fig. 4, Fig. 5, Fig. 6 to Fig. 7. In the embodiments of Fig. 11 and Fig. 12, two channel segments 8, 8' extending in the longitudinal direction of the coupling part 5 and arranged offset from each other are provided, between which a further annular channel segment 9 is provided. In the embodiment shown in Fig. 13, a profile in the form of a spiral 15 is provided. The injection material 11 is injected into the spaces between the spiral 15. Reference symbol list 1 Arrangement 2 Connection nozzle 3 Hose 4 Connection part 5 Coupling part 6 Channel 7 Profile structure 8, 8' Channel segment 9 Ring-shaped channel segment 10 Profile element 11 Injection compound 12 Web 13 Ring segment 14 Recess 15 Spiral

Claims

Arrangement (1) with a connecting piece (2) attached to a hose (3), wherein the connecting piece (2) has a coupling part (5) partially inserted into the hose (3) and a connecting part (4) located outside the hose (3), characterized in that a profile is provided on the outer surface of the area of ​​the coupling part (5) located in the hose (3), that a profile element (10) is provided in the area of ​​the coupling part (5) located outside the hose (3), and that an injection material (11) is provided for attaching the connecting piece (2) to the hose (3), which surrounds the profile element (10) in the area of ​​the coupling part (5) located outside the hose (3) and which extends over the adjacent area of ​​the hose (3), wherein the injection material (11) is provided on the outer surface of the hose (3) and on its end face facing the profile element (10). Arrangement (1) according to claim 1, characterized in that the profile element (10) is designed in the form of an annular elevation. Arrangement (1) according to one of claims 1 or 2, characterized in that the injection material (11) is stabilized on the coupling part (5) by the profile element (10). Arrangement (1) according to one of claims 1 to 3, characterized in that the profiling of the coupling part (5) has at least one profile structure (7) forming a raised area which provides mechanical fixation of the hose (3). Arrangement (1) according to claim 4, characterized in that the profile structure (7) is ramp-shaped, the slope of which in the direction of pulling the hose (3) onto the coupling part (5) is smaller than in the opposite direction. Arrangement (1) according to one of claims 4 or 5, characterized in that the or each profile structure (7) has a cross-section that is uniform in the direction of travel. Arrangement (1) according to claim 6, characterized in that each profile structure (7) forms a circumferentially closed structure. Arrangement (1) according to one of claims 1 to 5, characterized in that the profiling forms a continuous channel structure between the coupling part (5) and the hose (3), which opens at the edge of the hose (3). Arrangement (1) according to claim 8, characterized in that injection material (11) is injected into the channel structure via the outlet at the edge of the hose (3). Arrangement (1) according to one of claims 8 or 9, characterized in that the channel structure has at least one channel segment (8) extending in the longitudinal direction of the coupling part (5), which opens at the edge of the hose (3). Arrangement (1) according to claim 10, characterized in that the channel segment (8) runs parallel to the longitudinal axis of the coupling part (5). Arrangement (1) according to one of claims 10 or 11, characterized in that at least one further channel segment (9) extending in the circumferential direction of the coupling part (5) opens onto the longitudinally extending channel segment (8). Arrangement (1) according to claim 12, characterized in that the further channel segment (9) is ring-shaped. Arrangement (1) according to claim 13 , characterized in that several further channel segments (9) extending in the circumferential direction of the coupling part (5) are provided, which are arranged at a distance from each other in the longitudinal direction of the coupling part (5). Arrangement (1) according to one of claims 12 to 14, characterized in that the channel structure has several channel segments (8, 8') extending in the longitudinal direction of the coupling part (5) which are connected by at least one further channel segment (9) extending in the circumferential direction of the coupling part (5). Arrangement (1) according to one of claims 1 to 15, characterized in that the injection material (11) is applied to the coupling part (5) and the hose (3) in an injection molding process. Arrangement (1) according to one of claims 1 to 16, characterized in that the injection material (11) is a thermoplastic. Arrangement (1) according to one of claims 1 to 17, characterized in that the connecting nozzle (2) is penetrated in the longitudinal direction by a channel (6) whose diameter is at least approximately equal to the inner diameter of the hose (3). Arrangement (1) according to one of claims 18, characterized in that the hose (3) is stretched and fitted onto the coupling part (5). Arrangement (1) according to one of claims 1 to 19, characterized in that the hose (3) is a multi-layer kink-resistant hose (3).

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