fluid connection unit

Abstract

The present invention relates to a fluid connection unit (10) comprising a body (12) and an insertion element (38), the body having a receiving portion (20), the insertion element having at least one radially outwardly projecting protrusion (40) and defining an axially central connection opening (44) therein, the insertion element (38) being separately manufactured from the body (12) and being connectable to the body (12) such that the at least one protrusion (40) in all cases protrudes into a corresponding hole (42) formed in a region of the receiving portion (20), and the at least one protrusion (40) having a blocking side (48) extending outward in a substantially radial direction together with the associated protrusion (40) and pointing toward an axial end of the body (12) opposite to a connector (14), the blocking side (48) being designed to abut against the blocking protrusion (28) formed on the body (12) when the insertion element (38) engages with the receiving portion (20).

Description

Technical Field

[0001] The present invention relates to a fluid connection unit for connecting a fluid line to a fluid line port. Background Technology

[0002] For example, in a vehicle's engine compartment, various components are connected to each other using rubber fluid lines. However, such rubber lines may have the disadvantage of not being particularly resistant to external influences (e.g., mechanical loads). To prevent kinking of the rubber fluid lines, it is often necessary to manufacture the fluid lines according to their specific intended purpose in a pre-formed state, i.e., the curvature of the fluid lines is already formed during manufacturing. However, this severely limits the possible applications of a particular rubber fluid line and requires the use of associated specialized tools to manufacture fluid lines suitable for each specific application. Summary of the Invention

[0003] Therefore, the object of the present invention is to provide a fluid connection unit for connecting a fluid line to a fluid line port, which also allows a bellows to be connected to an existing fluid line port.

[0004] According to the present invention, the above-mentioned objective is achieved by a fluid connection unit for connecting a fluid line to a fluid line port of a higher-level component that is not part of the present invention, the fluid connection unit comprising:

[0005] The base body has a connector at one axial end for connection to a fluid pipeline and a receiving portion at the other axial end.

[0006] An insertion element comprising an elastic material, having at least one radially outwardly projecting protrusion and defining an axially central connection opening therein, wherein the insertion element is manufactured separately from the body and is connectable to the body such that the at least one protrusion protrudes into a corresponding hole formed in a region of the receiving portion, and

[0007] The at least one protrusion has a blocking side that extends outward in a substantially radial direction together with the associated protrusion and faces the axial end of the base body opposite the connector. The blocking side is designed to abut against the blocking protrusion designed on the base body when the receiving portion of the insert is engaged.

[0008] It should be noted that the “one axial end” and the “other axial end” of the base body represent the two free ends of the fluid connection unit, which do not necessarily have to be located on the axis.

[0009] Fluid lines designed as bellows can be connected to the connectors of the base body, wherein the bellows does not necessarily consist of only a series of corrugated grooves and corrugated peaks, but may also include smooth sections, i.e. sections having a substantially cylindrical shape in a predetermined area, and / or sections having increased or decreased diameters.

[0010] Advantageously, the insert element may have at least two, and particularly at least four, radially outwardly projecting protrusions. Multiple protrusions have the advantage that, when viewed in the circumferential direction relative to the axis defined by the axial central connecting opening, a portion of the base body is disposed between the respective protrusions, such that rotational fixation of the insert element relative to the base body can be formed through engagement between the protrusions of the insert element and the base body.

[0011] Therefore, the fluid connection unit according to the invention can connect fluid lines to existing components, such as corrugated pipes made of plastic, which have corresponding fluid line ports provided for connecting rubber fluid lines. Using corrugated pipes as fluid lines allows for the manufacture of cost-effective corrugated pipes designed to be straight in their primary direction of extension, and provides bends to the fluid lines only when they are used for their intended purpose, i.e., shaping them into the desired route of the fluid line.

[0012] Due to the two-part design of the insert element and the base body, the same base body can be optionally connected to different insert elements, which differ, for example, in the design of the axial central connection opening (e.g., different diameters). This allows the fluid connection unit according to the invention to be configured for connection to fluid line ports of different designs. The fact that the same designed components of the fluid connection unit according to the invention can be used for different fluid line ports means that the manufacturing cost of the fluid connection unit according to the invention can be significantly reduced. Of course, it is also conceivable that different base bodies can be adapted to specific insert elements, for example, base bodies that differ in the design and / or orientation of the connector (i.e., the angle formed between the connector and the rest of the base body).

[0013] In another aspect of the invention, the fluid connection unit may further include a clamping element adapted to engage a receiving portion and, in the engaged state with the receiving portion, apply a force on at least one protrusion to radially inwardly bias the inner wall of the defined axially central connection opening of the insertion element. The clamping element may be substantially annular and designed from an elastic material (particularly spring steel). By using the clamping element, the connection between the fluid connection unit and the fluid line port can be strengthened such that the connection can withstand higher pull-out forces, such higher pull-out forces being exerted, for example, due to the high fluid pressure of the fluid transported in the fluid line.

[0014] Here, the base body or insertion element can also be connected to different clamping elements, which differ in, for example, in their thickness and / or material (metal, plastic, etc.). This allows for different clamping and holding forces between the insertion element and the fluid line port.

[0015] Here, it is conceivable that at least one protrusion of the insert element projects radially outward so that it can contact the clamping element, which is designed to be substantially smooth at least internally, and it is conceivable that the clamping element has radially inward protrusions that project radially inward so that they can contact the insert element when the insert element is connected to the receiving portion.

[0016] In this respect, the base body may also have another receiving portion adapted to be engaged by the clamping element in its initial position. That is, the fluid connection unit according to the invention may have a clamping element connected to another receiving portion in its delivery state. After the fluid connection unit has been connected to the corresponding fluid line port, the clamping element can be easily repositioned from the other receiving portion to the receiving portion to contact at least one protrusion of the insertion element.

[0017] Advantageously, the fluid connection unit may also include a code portion containing a code adapted to identify the fluid connection unit. This code portion specifically contains a code unique to the corresponding fluid connection unit, and advantageously, this code is machine-readable, particularly DMC and / or RFID elements. Therefore, to ensure quality, each fluid connection unit can be recorded and its use verified.

[0018] In particular, it may be convenient to arrange the code portion in a radially outer superimposed manner within the region of another receiving portion, with the code superimposed on the clamping element while the clamping element is engaged with it. This prevents the code portion from being read during the delivery of the fluid connection unit or before the fluid connection unit is fully connected to the fluid line port, thus preventing the fluid connection unit from being mistakenly identified as assembled even if the corresponding connection is not correctly formed. In the case of an optically readable code portion, the clamping element can prevent readability by being designed with a non-transparent material such as metal. In the case of an electromagnetically readable code portion, the clamping element can prevent readability by being designed with a shielding material (such as metal).

[0019] The code section can be designed separately from the base body and can be attached to the base body, particularly using adhesives, printing, and / or form closures, such as latches. It should be noted that the "separate design" of the code section is not limited to being designed as a separate component, but as mentioned above, it can also be achieved by printing corresponding codes on the fluid connection unit.

[0020] To prevent the clamping element from unintentionally disengaging from another receiving portion and thereby releasing the code portion, a retaining protrusion can be provided, for example, between the receiving portion and the other receiving portion. This protrusion extends radially outward from the base body, thereby preventing the clamping element from shifting from engagement with the other receiving portion toward engagement with the receiving portion without changing the diameter of the clamping element. To also secure the clamping element in the opposite direction (i.e., away from the receiving portion), the base body can also have at least one radially outward-protruding portion, for example, an increase in the outer diameter of the base body.

[0021] Specifically, the blocking protrusion can be connected to the remainder of the base body via a web, wherein the minimum radial extension of the web is less than the minimum radial extension of the remainder of the blocking protrusion. In other words, the radially inner side of the web defines an inner diameter smaller than the radially inner surface of the blocking protrusion. For example, the blocking protrusion can be designed to be substantially annular, and the web can extend axially from the radially inner surface of the annular blocking protrusion toward another receiving portion, particularly extending to the retaining protrusion. When the insert element is designed to contact the radially inner surface of the web on its exterior, an arcuate gap, viewed in the circumferential direction of the fluid connection unit, can be formed between two adjacent webs when the insert element is connected to the base body. If the fluid connection unit is now pushed onto the fluid line port, the elastic material of the insert element can escape into the corresponding arcuate gap. This makes it easier to slide on the fluid connection unit, especially when the fluid line port is not designed to be cylindrical throughout its exterior.

[0022] Furthermore, the inner wall of the axial central connection opening of the insert element may have multiple recesses that are radially recessed outward from the nominal diameter of the axial central connection opening, and these recesses extend at least partially along the inner wall of the axial central connection opening of the insert element relative to the connection opening in the axial direction. These recesses (also referred to as grooves) can reduce the frictional surface between the insert element and the fluid line port, thereby facilitating the sliding of the fluid connection unit of the present invention onto the corresponding fluid line port.

[0023] The corresponding web of the base body can be assigned to the corresponding recess of the connection opening of the insertion element, such that the web and the recess are aligned in a way that overlaps each other when viewed in the radial direction. In this way, the reduced wall thickness of the insertion element (i.e., the corresponding recess) is provided in the region inside the web, thereby further reducing the force required for proper connection of the fluid connection unit according to the invention to the corresponding fluid line port.

[0024] The plurality of recesses extend from the axial end of the insert element associated with the blocking protrusion of the base body along the inner wall of the axially central connecting opening of the insert element to a maximal position, which also happens to overlap with the at least one protrusion in the radial direction. Specifically, the recesses on the inner wall of the insert element may end in such a way that at least a portion of at least one protrusion of the insert element, viewed in the radial direction, overlaps with a portion of the inner wall of the substantially cylindrical insert element (i.e., the inner wall has no recesses (grooves) throughout the entire circumference). This ensures that the insert element, when properly engaged with a clamping element, can form a sealing engagement with the fluid line port.

[0025] Advantageously, the inner wall of the axial central connection opening of the insert element can have a circumferential notch. For example, this notch can be designed as the reverse shape of a so-called "olive-shaped part." This "olive-shaped part" is a circumferential protrusion designed on the outer side of the region at the free end of the fluid line port.

[0026] The notch can be spaced apart from multiple recesses. That is, the recesses on the inner wall of the insert do not extend into the notch, thereby allowing for large-area contact between the notch and the corresponding portion (e.g., the "olive-shaped part") of the fluid line port.

[0027] Adjacent to the notch, particularly in the region between the notch and the end of the recess, at least one sealing lip may be provided, which protrudes circumferentially from the inner wall of the insert element at an angle in a radially inward direction.

[0028] The fluid connection unit may also include a sleeve unit adapted to be disposed radially outside the connector and to ensure the connection between the connector and the fluid line. In this case, by reducing its diameter, for example by contraction or compression, the sleeve unit can strengthen and secure the engagement between the fluid line and the connector.

[0029] In an advantageous embodiment, at least one protrusion of the insert element in the receiving portion region may protrude radially outward further than the base body. That is, when the receiving portion is viewed in the circumferential direction, the web connecting the blocking protrusion to the remainder of the base body protrudes less radially outward than the protrusion of the insert element. Therefore, as described above, the inner surface of the clamping element can be designed substantially smoothly.

[0030] Furthermore, pressure clips can be provided on the protrusions of the insert element, wherein, in particular, one pressure clip can be associated with each protrusion. Preferably, in all cases, the pressure clips completely overlap the protrusions radially outward. The pressure clips can have a base extending in the axial direction of the insert element and along the circumferential direction of the insert element, and two side portions extending substantially radially inward in the axial direction of the insert element. Thus, the pressure clips can be designed, in particular, to be U-shaped. The corresponding side portions can engage, in particular, undercut the protrusions, for example, with the substantially radially inwardly extending side surfaces of the protrusions. In this case, the pressure clips can at least partially or even completely surround the corresponding protrusions. Alternatively or additionally, the pressure clips can be adhesively attached to the protrusions.

[0031] For example, a pressure clamp can be attached to the protrusion after the insert element has been mounted on the base body and before the fluid connection is inserted into the insert element. By attaching the pressure clamp, the outer diameter of the insert element or its protrusion in the fluid connection unit can be increased, thereby allowing the clamping element to apply increased contact pressure on the fluid connection inside the insert element. For this purpose, it may be advantageous to make the pressure clamp from a material that is more rigid than the material of the insert element, such as polyamide 6, polypropylene, or metal. Furthermore, the attachment of a stiffer pressure clamp can prevent the clamping element from contacting the web of the base body and transmitting force to the web during the elastic deformation of the insert element. Thus, virtually all the restoring force of the clamping element can be used as a contact force on the fluid port.

[0032] Instead of using pressure clamps, it is conceivable to manufacture insert elements in multi-part injection molding methods, such that the corresponding protrusions of the insert elements can have softer material portions and harder material portions. For example, the protrusions may include a harder material on the radially outer side and a softer material on the radially inner side. Attached Figure Description

[0033] The invention will now be described in more detail with reference to the accompanying drawings and embodiments. In the drawings:

[0034] Figure 1 An exploded view of a first embodiment of the fluid connection unit according to the present invention is shown;

[0035] Figure 2 The assembly state is shown according to Figure 1 A perspective view of a first embodiment of the fluid connection unit;

[0036] Figure 3 A side sectional view of a first embodiment of the fluid connection unit is shown;

[0037] Figure 4 A side view of a second embodiment of the fluid connection unit according to the present invention is shown;

[0038] Figure 5 The second embodiment of the fluid connection unit according to the present invention is shown. Figure 4 A sectional view of section line VV; and

[0039] Figure 6 The third embodiment of the fluid connection unit according to the present invention is shown. Figure 4 Sectional view of section line VI-VI. Detailed Implementation

[0040] exist Figure 1 In the figures, the fluid connection unit according to the present invention is generally indicated by reference numeral 10. The fluid connection unit 10 includes a base body 12, the base body 12 being in... Figure 1 The right end shown includes a connector 14 for connecting the base body 12 to a fluid line (not shown). Figure 1 (As shown in the figure). A receiving recess 16 is provided on the connector 14, which is designed to receive a sealing element 18 for sealing fluid lines (see Figure 18). Figure 2 ).

[0041] The base body 12 includes a receiving portion 20 and another receiving portion 22, between which a retaining protrusion 24 is provided. The radially outward extension of the retaining protrusion 24 is greater than the radially outward extension of either the receiving portion 20 or the other receiving portion 22. In the receiving portion 20, in the embodiment shown here, four webs 26 are provided to connect the retaining protrusion 24 to a blocking protrusion 28. It can be seen that the webs 26 connect to the substantially annularly designed blocking protrusion 28 at the radially inner surface of the blocking protrusion 28, that is, protrude radially inward further than the blocking protrusion 28.

[0042] In another area of ​​the receiving section 22, a receiving surface 30 adapted to be connected to the code section 32 is provided. A code is set on the code section 32, which can be detected, for example, using an electronic reader.

[0043] In the illustrated embodiment, the fluid connection unit 10 further includes a clamping element 34, which is designed herein as an annular elastic clamp. In the delivery state of the fluid connection unit 10 according to the invention, the clamping element 34 can be connected to another receiving portion and held there in place by increasing the outer diameter 36 of the retaining protrusion 24 and the base body 12. In this position, the clamping element 34 can cover / mask the code portion 32 so that it cannot be read.

[0044] Furthermore, the fluid connection unit 10 according to the invention includes an insertion element 38 made of an elastic material (e.g., rubber). The insertion element 38 has a protrusion 40 on its outer periphery, the protrusion 40 protruding radially outward and being sized to engage in an opening 42 between corresponding adjacent webs 26 designed in the receiving portion 20 of the base body 12.

[0045] The insertion element 38 has an axially central connection opening 44 adapted to receive fluid. A plurality of recesses 46 are circumferentially distributed on the inner wall of the insertion element 38 defining the axially central connection opening 44. These recesses 46 are radially recessed outward from the nominal diameter of the axially central connection opening 44, and these recesses 46 are... Figure 1 The end of the insertion element 38 shown on the left extends in a groove-like manner in the axial direction (i.e., substantially parallel to the direction of the axis X defined by the axial central connection opening 44) (see [link]). Figure 3 ).

[0046] exist Figure 2 As can be seen, the insertion element 38 is rotated and aligned relative to the base body 12 by engaging the protrusion 40 with the ridge 26 of the base body 12, such that the recess 46 is associated with the corresponding web 26 in the radial interior.

[0047] When the fluid connection unit 10 is pushed onto the corresponding fluid line port, especially when it is displaced on the so-called "olive-shaped piece" of the fluid line port, the elastic material of the insertion element 38 may escape into the free arc-shaped space between the two corresponding adjacent webs 26 on the inside of the blocking protrusion 28.

[0048] Figure 3 It is also shown that the protrusion 40 of the insertion element 38 has a blocking side 48 on the side facing the blocking protrusion 28, which, especially when the fluid connection unit 10 is connected to the corresponding fluid line port, prevents the insertion element 38 from separating from the base body 12 by contacting the blocking protrusion 28. On the side opposite to the blocking protrusion 28, the protrusion 40 of the insertion element 38 has an insertion side 50 that facilitates the connection of the insertion element 38 to the base body 12.

[0049] exist Figure 3 It can also be seen that the groove-shaped recess 46 still terminates in the region of the insertion element 38 that is overlapped by the protrusion 40 in the radial direction.

[0050] A notch 52 is also provided on the inner wall of the axial central connection opening 44 of the insertion element 38, which is adapted to engage with the "olive-shaped piece" designed to connect to the fluid line port.

[0051] In the region of the connector 14 of the base body 12, a sleeve unit 54 is provided radially outward, which can ensure the connection between the connector 14 and the fluid line 56, for example by crimping.

[0052] Figure 4 A second embodiment 10' of the fluid connection unit according to the present invention is shown, which differs from the first embodiment 10 only in that the connecting member 14 of the base body 12' is provided at a certain angle on the base body 12'. Furthermore, it should be clearly noted that all features, effects, and advantages of the first embodiment 10 can also be applied to the second embodiment 10', and vice versa.

[0053] like Figure 4 As shown by line VV in the diagram, Figure 5 A cross-sectional view through the receiving portion 20 is shown, which includes an insertion element 38 connected thereto. Figure 5 In the image, it can be clearly seen that the protrusion 40 of the insertion element 38 protrudes radially outward beyond the maximum radial extension of the web 26 of the base body 12 or 12'.

[0054] When the clamping element 34 is connected to the receiving part 20 after the fluid connection unit 10 or 10' has been fully connected to the corresponding fluid line port, the elastic restoring force of the clamping element 34 applies force to the protrusion 40 of the insertion element 38, causing the elastic material of the insertion element 38 to be radially inwardly pressed and squeezed onto the fluid line port.

[0055] also, Figure 6 A cross-sectional view illustrates a third embodiment 10 of the fluid connection unit according to the present invention. Similar to... Figure 5 A cross-sectional view of the second embodiment 10' shown in the figure. Figure 6 The cross section shown is along Figure 4 The same section lines extend. However, in Figure 6 In the middle, the direction of observation is in the same direction as Figure 5 It extends in the opposite direction of the observation direction, that is, in the direction of the connection opening 44 of the insertion element 38. The difference between the third embodiment 10" of the fluid connection unit according to the invention and the first embodiment 10 and the second embodiment 10' is only that a pressure clip 58 is provided on the protrusion 40 of the insertion element 38. In particular, there is a pressure clip 58 associated with each protrusion 40. Furthermore, it should be clearly noted that all features, effects and advantages of the first embodiment 10 and / or the second embodiment 10' can also be applied to the third embodiment 10", and vice versa.

[0056] The corresponding protrusions 40 are preferably completely overlapped radially outward by the pressure clips 58. Furthermore, each pressure clip 58 has two radially inwardly extending sides 60, which are adapted to prevent the pressure clip 58 from releasing from the corresponding protrusion 40. Thus, the pressure clips 58 can... Figure 6 A clamping force is generated in the indicated state, thereby allowing the pressure clip 58 to be securely held on the protrusion 40. Alternatively or additionally, the pressure clip 58 may be bonded to the protrusion 40. The pressure clip 58 may be designed to be substantially U-shaped, wherein the corresponding base 62 of the pressure clip 58 extends in the circumferential direction, and the two sides 60 of the pressure clip 58 (as legs of the U-shape) are arranged to be substantially right-angled with the base 62, particularly extending radially inward. The distance between the free ends of the two sides 60 of the pressure clip 58, particularly in the circumferential direction, is shorter than the maximum extension of the corresponding protrusion 40 as observed in the circumferential direction.

[0057] By attaching the pressure clamp 58, embodiment 10" of the fluid connection unit has an increased outer diameter in the region of the insertion element 38 compared to embodiments 10 and 10'. The pressure clamp 58 can be made of a plastic material that is more rigid than the material of the insertion element 38, preferably polyamide 6 or polypropylene. When the fluid connection unit 10" is now in the state of fluid port connection, the clamping element 34 (not in...) Figure 6 The elastic restoring force (shown in the figure) applies a force to the pressure clamp 58, which is transmitted from the pressure clamp 58 to the protrusion 40. Due to the increase in the outer diameter in the region of the insertion element 38, the elastic material of the insertion element 38 can be further radially inwardly forceped via the clamping element 34, thereby generating an increased contact pressure at the fluid port.

[0058] Furthermore, the distance between the corresponding free end of the side 60 and the middle portion 64 of the insertion element 38 can be adjusted by designing the radial extension of the side 60 of the pressure clamp 58.

[0059] This allows the pressure clamp 58 to be limited to its displacement in the radially inward direction before impacting, i.e., contacting, the central region 64 of the insertion element 38, whereby the restoring force of the clamping element 34 can then be transmitted to the insertion element 38 via the base 62 and the sides 60 of the pressure clamp 58. Furthermore, the U-shaped arrangement of the pressure clamp 58 reduces the circumferential deformation of the elastic material of the insertion element 38. In general, this prevents the clamping element 34 from contacting the web 26 during the elastic deformation of the insertion element 38 and transmitting forces to them instead of to the insertion element 38.

[0060] The attachment of the pressure clip 58 to the protrusion 40 can be achieved by causing the side 60, which may initially be not bent much relative to the base 63, to bend only after the corresponding pressure clip 58 contacts the protrusion 40. Figure 6The state shown is completed, wherein the corresponding side 60 can be bent toward the undercut of the protrusion 40. Alternatively, the pressure clip 58 can be made into a U-shape and then pressed onto the protrusion 40, wherein it may be advantageous for the material of the insertion element 38 to be more elastic than the material of the pressure clip 58.

[0061] At this location, it should be mentioned that, instead of subsequently attaching the pressure clip 58 to the protrusion 40, it is also conceivable to use a multi-part injection molding method to manufacture the insert element 38, wherein, in particular, the protrusion 40 may have a softer material portion and a harder material portion. For example, the corresponding protrusion 40 has a harder material on the radially outer side and a softer material on the radially inner side.

Claims

1. A fluid connection unit (10, 10', 10'') for connecting a fluid line (56) to a fluid line port of a host component, the fluid connection unit (10, 10', 10'') comprising: The base body (12, 12') has a connector (14) at one axial end for connection with the fluid line (56) and a receiving portion (20) at the other axial end. An insertion element (38) comprising an elastic rubber material, having at least one radially outwardly projecting protrusion (40) and defining an axially central connection opening (44) therein, wherein the insertion element (38) is manufactured separately from the base body (12, 12') and is connectable to the base body (12, 12') such that at least one protrusion (40) protrudes into a corresponding corresponding hole (42) formed in the region of the receiving portion (20), and The at least one protrusion (40) has a blocking side (48) that extends outward in a substantially radial direction together with the associated protrusion (40) and faces the axial end of the base body (12, 12') opposite to the connector (14). The blocking side (48) is adapted to abut against the blocking protrusion (28) designed on the base body (12, 12') in the engaged state of the receiving portion (20) of the insertion element (38). The fluid connection unit (10, 10', 10'') is characterized in that it further includes a clamping element (34) adapted to engage the receiving portion (20) and, in the state of engagement with the receiving portion (20), to apply a force on the at least one protrusion (40) to radially inwardly bias the inner wall of the axial central connection opening (44) defining the insertion element (38).

2. The fluid connection unit (10, 10', 10'') according to claim 1. Its features are, The base body (12, 12') also has another receiving portion (22) which is adapted to be engaged by the clamping element (34) at the initial position of the clamping element (34).

3. The fluid connection unit (10, 10', 10'') according to claim 2. Its features are, The fluid connection unit (10, 10', 10'') also includes a code portion (32) containing code adapted to identify the fluid connection unit (10, 10', 10''), wherein the code portion (32) contains code specific to the corresponding fluid connection unit (10, 10', 10'').

4. The fluid connection unit (10, 10', 10'') according to claim 3. Its features are, With the clamping element (34) engaged with the other receiving portion (22), the code portion (32) is disposed in the region of the other receiving portion (22) in such a way that the code is superimposed on the radially outer side by the clamping element (34).

5. The fluid connection unit (10, 10', 10'') according to claim 3. Its features are, The code section (32) is designed separately from the base body (12, 12') and can be connected to the base body (12, 12').

6. The fluid connection unit (10, 10', 10'') according to claim 2 or 3. Its features are, A retaining protrusion (24) is provided between the receiving portion (20) and the other receiving portion (22), the retaining protrusion (24) protruding radially outward from the base body (12, 12') to prevent the clamping element (34) from shifting from engagement with the other receiving portion (22) toward engagement with the receiving portion (20) without changing the diameter of the clamping element (34).

7. The fluid connection unit (10, 10', 10'') according to claim 1 or 2. Its features are, The blocking protrusion (28) is connected to the remaining base body (12, 12') via a web (26), wherein the minimum radial extension of the web (26) is less than the minimum radial extension of the remaining blocking protrusion (28).

8. The fluid connection unit (10, 10', 10'') according to claim 1 or 2. Its features are, The inner wall of the axial central connection opening (44) of the insertion element (38) has a plurality of recesses (46) that are recessed radially outward from the nominal diameter of the axial central connection opening (44) and that extend in the axial direction relative to the axial central connection opening (44) at least in portions along the inner wall of the axial central connection opening (44) of the insertion element (38).

9. The fluid connection unit (10, 10', 10'') according to claim 8. Its features are, The corresponding web (26) of the base body (12, 12') is associated with the corresponding recess (46) of the axial central connection opening (44) of the insertion element (38) such that the web (26) and the recess (46) overlap and align with each other when viewed in the radial direction.

10. The fluid connection unit (10, 10', 10'') according to claim 8. Its features are, The plurality of recesses (46) extend from the axial end of the insertion element (38) associated with the blocking protrusion (28) of the base body (12, 12') along the inner wall of the axial central connecting opening (44) of the insertion element (38) to a maximum position which is also exactly overlapped in the radial direction by the at least one protrusion (40).

11. The fluid connection unit (10, 10', 10'') according to claim 10. Its features are, The inner wall of the axial central connection opening (44) of the insertion element (38) has a circumferential notch (52).

12. The fluid connection unit (10, 10', 10'') according to claim 11. Its features are, The notch (52) is spaced apart from the plurality of recesses (46).

13. The fluid connection unit (10, 10', 10'') according to claim 1 or 2. Its features are, The fluid connection unit (10, 10', 10'') further includes a sleeve unit (54) adapted to be disposed radially outside the connector (14) and to ensure the connection between the connector (14) and the fluid line (56).

14. The fluid connection unit (10, 10', 10'') according to claim 1 or 2. Its features are, The at least one protrusion (40) of the insertion element (38) in the region of the receiving portion (20) protrudes further radially outward than the base body (12, 12').

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