CONNECTING DEVICE FOR CONNECTING CONDUCTIVE COMPONENTS

Description

[0001] The invention relates to a connecting device for connecting conduit-shaped components suitable for guiding a flow medium, such as pressure medium hoses, pressure medium lines or the like, to one another or to other components.

[0002] Such connecting devices are used, particularly in pneumatics, to connect pressure medium-carrying pressure medium hoses or pressure medium lines or the like to each other or to connect them to other pneumatic components such as working cylinders, valves, pressure gauges or the like.

[0003] A generic connecting device is known, for example, from EP0379655A2.

[0004] The connecting device known from EP0379655A2 has the disadvantage that pressure medium hoses can only be held insufficiently.

[0005] Further connecting devices are known from DE 10 2004 046548 B3, EP 0 379 655 A2, DE 695 21 291 T2, DE 34 05 229 A1 and US 2 857 176 A.

[0006] The object of the present invention was to overcome the disadvantages of the prior art and to provide an improved connecting device.

[0007] This object is achieved by a connecting device according to the claims.

[0008] According to the invention, a connecting device is designed for connecting conduit-shaped components suitable for guiding a flow medium to one another or to other components. The connecting device comprises: a base body with a hose receiving area, wherein a seal receiving area is formed in the hose receiving area and wherein a collet receiving area is formed in the hose receiving area; a collet with a connection opening for receiving a line-shaped component, wherein the connection opening has a connection opening diameter, wherein the collet has a plurality of elastically springy clamping elements distributed over the circumference, wherein the collet is received in the collet receiving area so as to be displaceable in the axial direction relative to the base body, wherein the clamping elements are displaceable in the radial direction by axial displacement of the collet relative to the base body; a sealing element which is arranged in the seal receiving area and serves to seal between the line-shaped component and the base body.

[0009] The connecting device is designed to accommodate pipe-shaped components with different pipe diameters.

[0010] The connecting device according to the invention offers the advantage that only a single type of connecting device is required for conduit-shaped components with different conduit diameters. This reduces the number of different connecting devices required, which improves the overall production of connecting devices because only a smaller number of different tools are required to manufacture the connecting devices. This, in turn, leads to an improvement in the quality of the connecting devices. Furthermore, the connecting device according to the invention can improve the acceptability of conduit-shaped components with different conduit diameters, which can compensate for production-related diameter inaccuracies.

[0011] Furthermore, it can be expedient if a first axial stop is formed in the base body, which has a first cylindrical outer surface with a first axial stop diameter, and a second axial stop is formed, which has a second cylindrical outer surface with a second axial stop diameter. This has the advantage that a first type of line-shaped component with a first line diameter can be struck against the first axial stop and is thus defined in its inserted position, and that a second type of line-shaped component with a second line diameter can be struck against the second axial stop and can therefore assume a different axial position when inserted. On the one hand, this makes it possible to keep the dead space in the area of the axial stop outside the line-shaped component as small as possible.Furthermore, this measure allows conduit-shaped components with a smaller cable diameter to be inserted further into the connecting device than conduit-shaped components with a larger cable diameter. Thus, the required pull-out strength can be achieved even for conduit-shaped components with small cable diameters.

[0012] Furthermore, it can be provided that the first axial stop has a first end face and the second axial stop has a second end face, wherein the first end face and the second end face are arranged spaced apart from one another in the axial direction by an end face distance. This measure allows a different insertion depth to be achieved for different line-shaped components with different line diameters.

[0013] Furthermore, it can be provided that the second axial stop diameter is between 87% and 99.9%, in particular between 92% and 98%, preferably between 93.5% and 94.5% of the connection opening diameter. This has the advantage that any type of line-shaped component which has a different line diameter can have a tight fit in the connecting device. In particular, it can be provided that the connection opening diameter is 6.35 mm and has a tolerance of + / - 0.1 mm. Furthermore, it can be provided that the first axial stop diameter is the same size as the connection opening diameter. Thus, the first axial stop diameter can also be 6.35 mm with a tolerance of 0.1 mm. Furthermore, it can be provided that the second axial stop diameter is 6 mm with a tolerance of + / - 0.1 mm.

[0014] Also advantageous is a configuration according to which the first axial stop has a first axial stop length and the second axial stop has a second axial stop length, wherein the first axial stop length is between 90% and 110%, in particular between 95% and 105%, preferably between 98% and 102% of the second axial stop length. This offers the advantage that both a first conduit-shaped component with a first conduit diameter and a second conduit-shaped component with a second conduit diameter can be accommodated with a tight fit in the connecting device.

[0015] According to a further development, it is possible for the sealing element to have a sealing element diameter, wherein the sealing element diameter is between 25% and 55%, in particular between 30% and 45%, preferably between 37% and 43% of the connection opening diameter. Such a diameter ratio in particular brings with it the surprising advantage that different line-shaped components with different line diameters can be held securely and efficiently in the connecting device. Furthermore, this measure can achieve surprisingly good sealing when using different line-shaped components with different line diameters. In particular, it can be provided that the sealing element has a sealing element diameter between 2.3 mm and 2.7 mm, in particular 2.5 mm.

[0016] Furthermore, it may be advantageous for the sealing element to have a hardness between 30 Shore A and 75 Shore A, in particular between 40 Shore A and 60 Shore A, preferably between 47 Shore A and 53 Shore A. This measure can achieve surprisingly good sealing when using different pipe-shaped components with different pipe diameters.

[0017] Furthermore, it can be provided that the first end face is arranged at a first angle to a central axis and that the second end face is arranged at a second angle to the central axis, wherein the first angle and / or the second angle is between 30° and 89°, in particular between 30° and 70°, preferably between 40° and 60°. This has the advantage that a tight fit of different line-shaped components with different line diameters can be achieved in the connecting device.

[0018] Furthermore, it can be provided that the sealing element has a sealing element diameter and that the seal receiving area has a seal receiving height, wherein the seal receiving height is between 50% and 90%, in particular between 65% and 85%, preferably between 75% and 80% of the sealing element diameter. This brings with it the surprising advantage that different line-shaped components with different line diameters can be held in the connecting device with sufficient tightness.

[0019] Furthermore, it can be provided that a clamping bevel has a clamping bevel opening angle between 10° and 45°, in particular between 12° and 30°, preferably between 14° and 20°. If the clamping bevel has a clamping bevel opening angle within the specified range, it can be achieved that different line-shaped components with different line diameters can be accommodated in the connecting device, wherein a sufficient clamping effect can be achieved by the fixing lugs for the different line diameters. With a clamping bevel designed in this way, the fixing lugs can simultaneously be pressed apart sufficiently to release different line-shaped components with different line diameters for removal from the connecting device.

[0020] Furthermore, it can be provided that a collet opener is formed which corresponds to the clamping elements, wherein the collet opener is displaceable relative to the collet and wherein the collet opener has an actuating region which is designed to rest on an opening bevel of the clamping elements. This has the advantage that a simplified release of the line-shaped component can be achieved by means of the collet opener. In particular, the collet can be opened by displacing the collet opener in the direction of the collet, wherein the actuating region rests on the opening bevel of the clamping elements and presses them apart. In particular, the collet opener makes it easier to accommodate different line-shaped components with different line diameters in the connecting device and to remove them again from the connecting device.

[0021] Furthermore, the guide area can be provided with a bend extending toward the central axis at a longitudinal end facing away from the collet opener. This bend can be used to secure the collet opener against loss. In particular, it can be provided that the bend engages the base body of the connecting device in a form-fitting manner when the collet opener is displaced in the axial direction relative to the base body.

[0022] Furthermore, the collet opener can be provided with a first end wall that connects the guide area to the actuating area. This results in a simplified design of the collet opener. In particular, the guide area and the actuating area, together with the first end wall, can be U-shaped in longitudinal section.

[0023] The Shore A hardness is determined according to the measuring method standardized in DIN ISO 7619-1.

[0024] For a better understanding of the invention, it is explained in more detail with reference to the following figures.

[0025] They show in a highly simplified, schematic representation: Fig. 1 shows a first embodiment of a connecting device for connecting conduit-shaped components suitable for guiding a flow medium to other components; Fig. 2 shows a second embodiment of a connecting device for connecting conduit-shaped components suitable for guiding a flow medium to one another; Fig. 3 shows a third embodiment of a connecting device for connecting conduit-shaped components suitable for guiding a flow medium to other components.

[0026] By way of introduction, it should be noted that in the variously described embodiments, identical parts are provided with identical reference symbols or component designations, whereby the disclosures contained in the entire description can be applied mutatis mutandis to identical parts with identical reference symbols or component designations. Furthermore, the positional information chosen in the description, such as top, bottom, side, etc., refers to the directly described and illustrated figure, and in the event of a change in position, these positional information must be applied mutatis mutandis to the new position.

[0027] Fig. 1 shows a first embodiment of a connecting device 1 in a longitudinal section.

[0028] As from Fig. 1As can be seen, it can be provided that the connecting device 1 comprises a base body 2. The base body 2 can have a hose receiving area 3. The hose receiving area 3 can have a seal receiving area 4. Furthermore, it can be provided that a collet receiving area 5 is formed in the hose receiving area 3. In particular, it can be provided that the base body 2 is formed rotationally symmetrically about a central axis 6 in the hose receiving area.

[0029] The collet receiving area 5 can serve to receive a collet 7. In particular, it can be provided that the collet 7 has a connection opening 8 for receiving a line-shaped component 9. The line-shaped component 9 can have a line diameter 10. In particular, different line-shaped components 9 with different line diameters 10 can be inserted into the connecting device 1 designed according to the invention. In a special embodiment, it can be provided that the line diameter 10 can be between 5.9 mm and 6.45 mm.

[0030] The connection opening 8 can have a connection opening diameter 11. The connection opening diameter 11 can be 6.55 mm.

[0031] Furthermore, it can be provided that the collet 7 has one or more clamping elements 12 distributed over the circumference, which can serve to axially fix the line-shaped component 9 in the connecting device 1. In particular, it can be provided that the clamping elements 12 are segment-shaped when viewed over the circumference, wherein a clamping element clearance 13 can be formed between the individual clamping elements 12. The clamping elements 12 can also each have a fixing lug 14. The fixing lug 14 can be designed to protrude inwards relative to the connection opening 8 in such a way that it can engage in the line-shaped component 9.

[0032] Furthermore, it can be provided that the clamping elements 12 are elastically resilient in the radial direction, so that the fixing lug 14 can be pressed into the conduit-shaped component 9 in the radial direction. In particular, it can be provided that a clamping bevel 15 is formed in the collet receiving area 5. The clamping bevel 15 can be conically tapered towards a first longitudinal end 17 of the base body 2. Corresponding to the taper, the clamping element 12 can have a clamping element bevel 16. The clamping element bevel 16 of the clamping element 12 can bear against the clamping bevel 15.

[0033] When the collet 7 is displaced toward the first longitudinal end 17, the clamping elements 12 can be pressed inward by the clamping bevel 15. This measure allows the conduit-shaped component 9 to be secured axially in the connecting device 1. In particular, it can be provided that the fixing lug 14 is hooked or clawed into the conduit-shaped component 9 in the installed state, thus achieving self-locking upon axial pulling of the conduit-shaped component 9 toward the first longitudinal end 17 of the base body 2.

[0034] When the collet 7 is pushed into the base body 2 in the axial direction, the clamping elements 12 can move outward in the radial direction, whereby the fixing lug 14 can be disengaged from the line-shaped component 9 and thus the line-shaped component 9 can be released for withdrawal from the connecting device 1. The collet 7 can furthermore have a guide section 18, by means of which the collet 7 can be held displaceably in the axial direction in the collet receiving area 5 of the base body 2. Furthermore, the collet 7 can have a stop shoulder 19, which serves to limit the axial displaceability of the collet 7 relative to the base body 2. As can be seen from Fig. 1As can also be seen, the stop shoulder 19 can be designed to protrude from the first longitudinal end 17 of the base body 2. Furthermore, the stop shoulder 19 can simultaneously serve as an actuating element for displacing the collet 7 in the axial direction and thus for releasing the conduit-shaped component 9. In particular, the collet 7 can be gripped in the area of the stop shoulder 19 or can be pressed against the stop shoulder 19 by the user in order to displace the collet 7.

[0035] A sealing element 20 can be accommodated in the seal receiving area 4. The sealing element 20 can have a sealing element diameter 21. In particular, it can be provided that the sealing element diameter 21 is 2.5 mm. Furthermore, it can be provided that the sealing element 20 is formed from a rubber-like material.

[0036] Furthermore, it can be provided that the seal receiving area 4 of the base body 2 has a sealing element end face 22, which serves for the axial positioning of the sealing element 20.

[0037] Furthermore, it can be provided that the seal receiving area 4 has a sealing element surface 23, which serves for the radial positioning of the sealing element 20. In the illustration according to Fig. 1 The sealing element 20 is shown in its unloaded form for illustrative purposes. For the sake of completeness, it should be noted that, contrary to the illustration, the sealing element 20 in the installed state Fig. 1actually rests against the sealing element surface 23 and is therefore deformed accordingly in its overall diameter. In particular, it can be provided that, in the plugged-in state of the conduit-shaped component 9 with the connecting device 1, the sealing element 20 rests against both the outer surface of the conduit-shaped component 9 and the sealing element surface 23 and exerts its sealing effect against these surfaces.

[0038] Furthermore, it can be provided that a first axial stop 24 is formed in the base body 2, which serves to receive a line-shaped component 9 with a first line diameter 10. The first axial stop 24 can have a first cylindrical outer surface 25, which corresponds to the line diameter 10. In particular, it can be provided that the first cylindrical outer surface 25 has a first axial stop diameter 26. Furthermore, it can be provided that the first axial stop 24 has a first end face 27.

[0039] Furthermore, it can be provided that a second axial stop 28 is formed, which has a second cylindrical outer surface 29. The second cylindrical outer surface 29 can have a second axial stop diameter 30. Furthermore, it can be provided that a second end face 31 is formed in the second axial stop 28.

[0040] As from Fig. 1clearly visible, it can be provided that the second axial stop diameter 30 is smaller than the first axial stop diameter 26.

[0041] The first end face 27 and the second end face 31 can be arranged at a distance 32 between the end faces. Furthermore, the first axial stop 24 can have a first axial stop length 33. The second axial stop 28 can have a second axial stop length 34.

[0042] As from Fig. 1 As can be seen, it can be provided that the second axial stop length extension 34 and the end face distance 32 are of the same size.

[0043] As from Fig. 1 As can also be seen, it can be provided that the first end face 27 is arranged at a first angle 35 to the central axis 6. Furthermore, it can be provided that the second end face 31 is arranged at a second angle 36 to the central axis 6. As can be seen from Fig. 1As can also be seen, the seal receiving area 4 can have a seal receiving height 37. The seal receiving height 37 can be calculated from a seal receiving diameter 38 of the sealing element surface minus the first axial stop diameter 26 divided by 2. Mathematically: (Seal receiving diameter 38 - first axial stop diameter 26) / 2

[0044] As from Fig. 1 As can also be seen, the base body 2 can have a screw-in region 40 at a second longitudinal end 39, on which an external thread can be formed. By means of the screw-in region 40, the connecting device 1 can be received or fixed in a corresponding threaded bore. Furthermore, it can be provided that a screw-in seal 41 is formed in the screw-in region 40.

[0045] As from Fig. 1As can also be seen, it can be provided that the base body 2 can have a through opening extending from the first longitudinal end 17 to the second longitudinal end 39, through which a fluid can flow.

[0046] Furthermore, it can be provided that the clamping bevel 15 has a clamping bevel opening angle 42.

[0047] In the Fig. 2 a further and possibly independent embodiment of the connecting device 1 is shown, wherein again the same reference numerals or component designations are used for the same parts as in the previous Fig. 1 To avoid unnecessary repetition, please refer to the detailed description in the previous Fig. 1 pointed out or referred to.

[0048] As from Fig. 2 As can be seen, it can be provided that the connecting device 1 is not as in the embodiment according to Fig. 1for screwing into a component, but that the connecting device 1 has a collet 7 on both sides. The connecting device 1 can be designed symmetrically with respect to a longitudinal center plane and thus serve to receive a line-shaped component 9 on both sides.

[0049] Both sides of the connecting device 1, as shown in Fig. 2 shown, can be used according to the explanations in Fig. 1 In particular, it can be provided that the first axial stop 24 and the second axial stop 28 are formed on both sides of the base body 2 and the connecting device 1 can thus serve on both sides to accommodate line-shaped components 9 with variable line diameters 10.

[0050] In the Fig. 3a further and possibly independent embodiment of the connecting device 1 is shown, wherein again the same reference numerals or component designations are used for the same parts as in the previous Fig. 1 To avoid unnecessary repetition, please refer to the detailed description in the previous Fig. 1 pointed out or referred to.

[0051] As from Fig. 3 As can be seen, it can be provided that in the unactuated state the clamping element bevel 16 is arranged parallel to the clamping bevel 15.

[0052] As in the alternative embodiment according to Fig. 3As can also be seen, a collet opener 43 can be provided. The collet opener 43 can be designed as a separate component from the collet 7. In particular, it can be provided that the collet opener corresponds to the clamping elements 12. In particular, it can be provided that the collet opener 43 has an actuating area 44, which serves to engage an opening bevel 45 of the clamping elements 12.

[0053] Upon axial displacement of the collet opener 43 relative to the collet 7, in particular toward the collet 7, the clamping elements 12 can be pushed outward from the actuating area 44 of the collet opener 43, so that the fixing lugs 14 can be disengaged from any conduit-shaped component 9 accommodated in the connecting device 1. Thus, the conduit-shaped component 9 can be removed from the connecting device.

[0054] To guide the axial displacement, the collet opener 43 can have a guide region 46. The guide region 46 can be arranged externally around the base body 2. In particular, it can be provided that the guide region 46 of the collet opener 43 surrounds the base body 2 in a sleeve-like manner.

[0055] Furthermore, it can be provided that the guide area 46 has a crank 47 drawn towards the central axis 6 at a longitudinal end facing away from the collet opener 43.

[0056] Furthermore, it can be provided that the collet opener 43 has a first end wall 48 which connects the guide area 46 to the actuating area 44.

[0057] In Fig. 3The connecting device 1 is shown in its rest position, in which the individual clamping elements 12 are in their rest position. In this case, the clamping elements 12 can engage with an inserted line-shaped component 9 or the line-shaped component 9 can be pushed into the connecting device 1. If in a position of the connecting device 1 according to the illustration according to Fig. 3 If the collet opener 43 is moved to the left, the collet opener 43 can come into contact with the opening bevel 45. If the collet opener 43 is moved further to the left, the clamping elements 12 are pushed outward by the actuating area 44, causing them to be elastically deformed. In this case, the clamping element bevel 16 can come into contact with the clamping bevel 15.

[0058] When the collet opener 43 is released, the clamping elements 12 can be moved inward again due to the spring force of the elastic deformation. If a conduit-shaped component 9 is present, the fixing lugs 14 can be pressed into the conduit-shaped component 9 in a form-fitting manner, causing it to plastically deform.

[0059] The embodiments show possible embodiments, whereby it should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather various combinations of the individual embodiments with one another are also possible and this possibility of variation lies within the skill of the person skilled in the art in this technical field due to the teaching of technical action by means of the objective invention.

[0060] The scope of protection is determined by the claims. However, the description and drawings must be used to interpret the claims. Individual features or combinations of features from the various embodiments shown and described may represent independent inventive solutions. The problem underlying the independent inventive solutions can be derived from the description.

[0061] All information on value ranges in this description is to be understood as including any and all sub-ranges thereof, e.g. the information 1 to 10 is to be understood as including all sub-ranges starting from the lower limit of 1 and the upper limit of 10, ie all sub-ranges begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[0062] For the sake of clarity, it should finally be pointed out that, in order to better understand the structure, some elements have been shown out of scale and / or enlarged and / or reduced in size. List of reference symbols

[0063] 1 connecting device 26 first axial stop diameter 2 Basic body 3 Hose receiving area 27 first frontal surface 4 Seal receiving area 28 second axial stop 5 Collet chuck area 29 second cylindrical surface 6 central axis 30 second axial stop diameter 7 Collet 8 Connection opening 31 second frontal surface 9 conductive component 32 Frontal distance 10 Pipe diameter 33 first axial stop length extension 11 Connection opening diameter 34 second axial stop length extension 12 clamping element 13 Clamping element clearance 35 first angle 14 Fixing nose 36 second angle 15 clamping bevel 37 Sealing height 16 Clamping element inclination 38 Sealing diameter 17 first longitudinal end 18 Guide section 39 second longitudinal end 19 Stop shoulder 40 Screw-in area 20 Sealing element 41 screw-in seal 21 Sealing element diameter 42 Clamping chamfer opening angle 22 Sealing element face 43 Collet opener 23 Sealing element surface 44 Operating area 45 Opening slope 24 first axial stop 46 Management area 25 first cylindrical surface 47 Crank 48 first front wall

Claims

1. A connection device (1) comprising: - a base body (2) with a hose-receiving region (3), wherein a seal-receiving region (4) is formed in the hose-receiving region (3) and wherein a collet-chuck-receiving region (5) is formed in the hose-receiving region (3); - a collet chuck (7) with a connection opening (8) for receiving a line-shaped component (9), the connection opening (8) having a connection opening diameter (11), the collet chuck (7) having a plurality of elastically resilient clamping elements (12) distributed over the circumference, the collet chuck (7) being received in the collet-chuck-receiving region (5) so as to be displaceable in the axial direction relative to the base body (2), the clamping elements (12) being displaceable in the radial direction by axial displacement of the collet chuck (7) relative to the base body (2); - a sealing element (20), which is arranged in the seal-receiving region (4) and forms a seal between the line-shaped component (9) and the base body (2), a first axial stop (24) being formed in the base body (2), having a first cylindrical lateral surface (25) with a first axial stop diameter (26), and a second axial stop (28) being formed, having a second cylindrical lateral surface (29) with a second axial stop diameter (30), characterized in that the first axial stop (24) stops first type of the line-shaped component (9) with a first line diameter (10) and the second axial stop (28) stops a second type of the line-shaped component (9) with a second line diameter (10), wherein the first axial stop (24) has a first end face (27) and the second axial stop (28) has a second end face (31), wherein the first end face (27) and the second end face (31) are arranged spaced apart from one another in the axial direction at an end face distance (32), such that the connection device (1) is configured to receive line-shaped components (9) with different line diameters (10).

2. The connection device (1) according to Claim 1, characterized in that the second axial stop diameter (30) is between 87% and 99.9%, in particular between 92% and 98%, preferably between 93.5% and 94.5% of the connection opening diameter (11).

3. The connection device (1) according to one of the Claims 1 or 2, characterized in that the first axial stop (24) has a first axial stop longitudinal extension (33) and that the second axial stop (28) has a second axial stop longitudinal extension (34), wherein the first axial stop longitudinal extension (33) is between 90% and 110%, in particular between 95% and 105%, preferably between 98% and 102% of the second axial stop longitudinal extension (34).

4. The connection device (1) according to one of the preceding Claims, characterized in that the sealing element (20) has a sealing element diameter (21), wherein the sealing element diameter (21) is between 25% and 55%, in particular between 30% and 45%, preferably between 37% and 43% of the connection opening diameter (11).

5. The connection device (1) according to one of the preceding Claims, characterized in that the sealing element (20) has a hardness between 30 Shore A and 75 Shore A, in particular between 40 Shore A and 60 Shore A, preferably between 47 Shore A and 53 Shore A.

6. The connection device (1) according to Claim 1, characterized in that the first end face (27) is arranged at a first angle (35) to a central axis (6) and that the second end face (31) is arranged at a second angle (36) to the central axis (6), wherein the first angle (35) and / or the second angle (36) is between 30° and 89°, in particular between 30° and 70°, preferably between 40° and 60°.

7. The connection device (1) according to one of the preceding Claims, characterized in that the sealing element (20) has a sealing element diameter (21) and that the seal-receiving region (4) has a seal-receiving height (37), wherein the seal-receiving height (37) is between 50% and 90%, in particular between 65% and 85%, preferably between 75% and 80% of the sealing element diameter (21).

8. The connection device (1) according to one of the preceding Claims, characterized in that a clamping bevel (15) has a clamping bevel opening angle (42) between10° and 45°, in particular between 12° and 30°, preferably between 14° and 20°.

9. The connection device (1) according to one of the preceding Claims, characterized in that a collet chuck opener (43) is formed, which corresponds to the clamping elements (12), wherein the collet chuck opener (43) is displaceable relative to the collet chuck (7), and wherein the collet chuck opener (43) has an actuating region (44), which is configured to bear against an opening bevel (45) of the clamping elements (12).

10. The connection device (1) according to Claim 9, characterized in that the collet chuck opener (43) has a guide region (46), which is arranged on the outside around the base body (2) and is configured for axially guided displacement on the base body (2).

11. The connection device (1) according to Claim 10, characterized in that the guide region (46) has an offset (47) drawn towards the central axis (6) at a longitudinal end facing away from the collet chuck opener (43).

12. The connection device (1) according to one of the Claims 10 to 11, characterized in that the collet chuck opener (43) has a first end wall (48), which connects the guide region (46) to the actuating region (44).