Cable connection

Abstract

Device (10) for establishing a cable connection, comprising a receiving unit (100) for the at least one contact element (SB) enabling the cable connection, and a covering unit (200) for covering the receiving unit (100), wherein the receiving unit (100) has a base body (102) which has at least a first cylindrical portion (110) with a first and a second end (110a, 110b) and at least one second cylindrical portion (120) extending from the second end (110b) and coaxially thereto, and wherein the cover unit (200) comprises a cap element (210) with at least one cylindrical portion (212) having an open end (212a) and a closed end (212b), wherein the cover unit (200) is designed such that the cylindrical portion (212) can be reversibly placed with its open end (212a) in a closing direction (V) onto the first cylindrical portion (110) of the base body (102) and can be reversibly locked thereto by means of a mechanical connecting device (300), wherein the connecting device (300) comprises: - at least one guide groove (310) machined into the outer side of the first cylindrical section (110), which opens into an inlet opening (313) in the annular surface (112) formed by the first end (110a) of the first cylindrical section (110) and pointing counter to the closing direction (V), wherein an annular contact surface (114) extending radially inward from the inlet opening (313) of the guide groove (310) is formed on the annular surface (112), and - at least one guide pin (320) arranged on the inside of the cylindrical portion (212) of the cap element (210) of the cover unit (200), directed radially inward and engaging in the at least one guide groove (310) when the cover unit (200) is placed on the base body (102) of the receiving unit (100), further comprising a sealing arrangement (400; 500; 600) with at least one preferably at least approximately annular sealing unit (410; 510; 610) arranged on the inside of the closed end (212b) of the cap element (210), and with at least one sealing section (412; 512; 612) facing the contact surface (114) and coming into contact therewith to produce a fluid-tight seal, wherein the diameter of the at least one sealing section (412; 512; 612) is smaller than the maximum diameter of the annular contact surface (114) but larger than its minimum diameter, wherein the sealing unit (410) is a flat ring seal, with at least one annular bead arranged on the surface facing the annular contact surface (114) of the base body (102) and forming the sealing section (412), wherein preferably the sealing unit (410) has two annular beads (412) radially spaced from one another on the surface facing the annular contact surface (114) of the base body (100).

Description

[0001] The present invention relates to a device for establishing a cable connection.

[0002] Cable connection devices in the form of plug-in connectors are known from the prior art. These connectors comprise a socket and a corresponding plug. To protect such connectors from harmful environmental influences, such as dirt and / or moisture, it is also known to provide these connectors, or parts thereof, with a protective cover or similar device, for example, by means of a cap that can be screwed onto a part of the connector.

[0003] The disadvantage of these known protective devices is that their installation is time-consuming in the case of a threaded connection, and if the connection is not fully screwed on, there is still a risk of contamination of the plug connection or the ingress of moisture. If sealing elements, such as sealing rings or flat gaskets, are intended to protect against moisture, their protective effect relies on the highest possible contact pressure. This may adequately protect the plug connection but make it very difficult to open. This can not only impair the durability of the sealing element, but is also disadvantageous if such a plug connection must be regularly disconnected and reconnected.

[0004] It is therefore an object of the present invention to provide a device for establishing a cable connection which reliably protects the cable connection from harmful external influences and can be opened safely and reversibly.

[0005] According to the present invention, a device for establishing a cable connection is proposed, as defined in claim 1. In particular, the device comprises a receiving unit for the at least one contact element of the cable connection enabling the cable connection, and a covering unit for covering or closing the receiving unit. The receiving unit has a base body having at least a first cylindrical section with a first and a second end, and at least one second cylindrical section extending from the second end of the first section and coaxially therewith.The cover unit comprises a cap element with at least one cylindrical portion having an open end and a closed end, wherein the cylindrical portion of the cap element can be reversibly placed with its open end in a closing direction onto the first cylindrical portion of the base body and can be reversibly locked thereto by means of a mechanical connecting device.The mechanical connecting device includes at least one guide groove machined into the outer side of the first cylindrical section of the base body, which guide groove opens into an inlet opening in the annular surface formed by the first end of the first cylindrical section of the base body and pointing opposite to the closing direction, wherein an annular contact surface extending radially inward from the inlet opening of the guide groove is formed on the annular surface, and at least one guide pin arranged on the inner side of the cylindrical section of the cover unit, directed radially inward and engaging in the at least one guide groove when the cover unit is placed on the base body.The device further comprises a sealing arrangement with at least one preferably at least approximately annular sealing unit, which is arranged on the inside of the closed end of the cap element, and with at least one sealing section facing the contact surface and coming into contact with it, for producing a fluid-tight seal, wherein the diameter of the at least one sealing section is smaller than the maximum diameter of the annular contact surface but larger than its minimum diameter.

[0006] The sealing arrangement according to the invention offers a secure and permanent protection of the device against harmful external influences, such as moisture and / or dirt, and the receiving unit, in combination with the mechanical connecting device designed in this way, is secured against unintentional opening and yet is reliable and easy to open.

[0007] As explained above, the mechanical connection device is formed by a bayonet lock arrangement. Of course, other mechanical connection devices may also be provided.

[0008] In an advantageous embodiment of the device according to the invention, the sealing unit is a flat gasket or flat ring gasket, with at least one annular elevation, which may, for example, be a bead, arranged on the surface facing the annular contact surface of the base body and forming the sealing section. In this embodiment, the sealing element assumes the sealing function, allowing the contact pressure to be lower than with known flat gaskets, while simultaneously ensuring the sealing function.

[0009] To further improve the sealing function, for example, in difficult environments, the invention also provides for the sealing unit to have two annular elevations spaced radially apart from one another on the surface facing the annular contact surface of the base body. Of course, more than two annular elevations can also be provided.

[0010] In a further advantageous embodiment, the sealing unit can be a sealing ring with a circular cross-section, the annular surface portion of which, facing the annular contact surface of the base body, forms the sealing portion. Alternatively, the invention can also provide for the sealing unit to be a quad ring with four sealing lips, with two sealing lips facing the annular contact surface of the base body forming the sealing portion.

[0011] In a preferred embodiment, the sealing arrangement can have a circumferential groove provided on the inside, in the region of the closed end of the cap element, in which the sealing unit is at least partially received. This holds the sealing unit in its position in the cap element and, for example, secures it against slipping or loss.

[0012] The circumferential groove for accommodating the sealing unit can be arranged at different locations on the cap element. However, depending on the design of the sealing unit, it is preferably provided on the radial inner side or the axial inner side of the cap element.

[0013] In order to avoid damage to the sealing unit and thus impairment of the tightness, it can further be provided that the inlet opening of the guide groove has at least partially rounded edges at least in the area of the radially extending sections.

[0014] To improve the closing function and prevent accidental opening, the guide groove can include a retaining device at its end to secure the cap in the closed position. The guide groove can form a retaining contour that ensures secure closure and prevents accidental opening of the mechanical connection.

[0015] The guide groove can be designed in different ways. In one advantageous embodiment, it has a first groove section extending from the inlet opening and, in the insertion direction, at least partially encircling the first cylindrical section of the base body, which ends in a second groove section extending opposite to the insertion direction. In this embodiment, a high point in the guide contour is formed between the two groove sections, which requires increased force when fitting the cap element. This ensures a secure closure on the one hand, and prevents unintentional opening, e.g., due to vibrations in the machine, on the other.

[0016] In a further advantageous embodiment of the device according to the invention, a radially outwardly extending flange can be arranged on the base body in a region between the first cylindrical section and the second cylindrical section. Such a flange enables the base body of the device to be attached to a machine, for example, to a covering element of the machine.

[0017] Furthermore, an annular groove with an annular sealing element arranged therein can be provided in the surface facing away from the first cylindrical portion of the base body. Such a sealing arrangement reliably prevents the penetration of dirt and / or moisture past the base body into a machine to which the device is attached.

[0018] If the cover unit has a securing element to secure the cap element to the receiving unit, the cover unit is protected against falling and / or loss.

[0019] The device according to the invention can be attached to a machine in various ways. In a further advantageous embodiment, an external thread onto which a nut can be screwed can be arranged on the outer surface of the second cylindrical section of the base body. Thus, the second cylindrical section of the base body can be inserted into a corresponding opening in the machine and secured there.

[0020] Further advantages of the present invention and advantageous embodiments are explained below with reference to the accompanying drawings. The terms "right," "left," "top," and "bottom" refer to the respective drawings in their normal orientation.

[0021] They show: Fig. 1: a perspective view of a first embodiment of a device for establishing a cable connection according to the present invention; Fig. 1a: a perspective view of a cap element of the device according to Fig. 1; Fig. 2: a perspective view of a base body of the device according to Fig. 1; Fig. 3a: a sectional view of the device according to Fig. 1 along line XX in Fig. 1; Fig. 3b: Detail B from Fig. 3a; Fig. 4a: a sectional view of a second embodiment of a device for establishing a cable connection according to the present invention; Fig. 4b: Detail C from Fig. 4a; Fig. 5a: a sectional view of a third embodiment of a device for establishing a cable connection according to the present invention along the line XX in Fig. 1; and Fig. 5b: Detail D from Fig. 5a.

[0022] The device 10 for establishing a cable connection according to the Fig. 1 to 3b comprises a base body 102 forming a receiving unit 100 with a first cylindrical section 110 having a first end 110a and a second end 110b (cf. Fig. 3a), and with a second cylindrical portion 120, which also includes a first end 120a and a second end 120b. The first and second cylindrical portions 110, 120 are coaxially aligned with a common central axis A.

[0023] As in the Fig. 2 and Fig. As can be seen in Figure 3a, a coupling element for reversibly establishing a cable connection in the form of a plug socket SB is accommodated in the first cylindrical section 110 of the base body 102. The cable K connected to the plug socket SB is guided through the second cylindrical section 120, in which the cable K is sealed fluid-tight, and exits at its second end 120b.

[0024] The device 10 further comprises a cover unit 200 with a cap element 210 that can be reversibly placed on the first cylindrical section 110 coaxially to the central axis A and in a closing direction V. The cap element 210 is secured to the base body 102 by means of a securing element 220 against falling off and / or loss.

[0025] The cap element 210 of the cover unit 200 comprises, as shown in the Fig. 1a, a cylindrical portion 212 with an open end 212a and a closed end 212b formed by a planar end element 214.

[0026] The cap element 210 can be reversibly locked to the first section 110 of the base body 102 by means of a mechanical connection 300 in the form of a bayonet lock.

[0027] The mechanical connection or bayonet closure 300 comprises three guide grooves 310 machined into the outside of the first cylindrical section 110 and arranged evenly distributed over its circumference (cf. Fig. 2). Each of the guide grooves 310 has a first groove section 312. This extends from the end or annular surface 112 at the first end 110a of the first cylindrical section 110 in the closing direction V and in a counterclockwise arc. The first groove section 312 opens into the annular surface 112 in an inlet opening 313. As shown in Fig. 2, at least the radially extending, i.e. circumferentially oriented edges 313a of the approximately rectangular inlet opening 313 are rounded. Adjoining the end of the first groove section 312 facing away from the annular surface 112 is a second groove section 314 which is shorter than the first groove section 312 and extends from the end of the first groove section 312 at least approximately in the circumferential direction and at least approximately opposite to the closing direction V. The groove sections 312, 314 form a guide contour 316 on their side surface facing the first end 110a of the first cylindrical section 110, with a high point 316a located between the first and second groove sections 312, 314 and facing in the closing direction V.

[0028] On the inside of the cylindrical portion 212 of the cap element 210, guide pins 320 corresponding to the guide grooves 310 are arranged (cf. Fig. 1a), the length of which corresponds at least approximately to the depth of the guide grooves 310, and the diameter of which corresponds at least approximately to the width of the guide grooves.

[0029] As continued in Fig. 2, the annular surface 112 formed by the front side of the first end 110a of the first cylindrical section 110 of the base body 102 has a continuous circular surface 114 which is not affected by the inlet openings 313 of the guide grooves 310 and which extends from the inlet openings 313 radially to the central axis A of the base body 100. The circular surface or contact surface 114 is in Fig. 2 shown as a hatched area.

[0030] The device 10 further comprises a sealing arrangement 400 with a sealing unit 410, which in this embodiment is designed as a flat seal or flat ring seal 410, as is the case with the Fig. 3a, Fig. 3b. In the area of the closed end 212b of the cap element 210, a circumferential groove 420 is machined into the inner surface of the cylindrical section 212, in which the sealing unit or the flat ring seal 410 is received with its outer edge and secured in its position in the cap element 210. The inner diameter of the flat ring seal 412 corresponds at least approximately to the inner diameter of the first cylindrical section 110 of the base body 102, and thus approximately to the inner diameter of the contact surface 114. In the closed position of the cap element 210, as shown in the Fig. 1 and Fig. 3, the sealing unit or the flat ring seal 410 rests with its surface pointing in the closing direction V against the annular surface 112 of the first cylindrical section 110 of the base body 102.

[0031] The flat ring seal 410 has two sealing elements 412 arranged on each of the annular end faces. The sealing elements 412 are designed as annular beads, each aligned coaxially and spaced apart from one another. The diameter of the respective radially inner bead 412 is slightly larger than the inner diameter of the flat ring seal 410, and the diameter of the respective radially outer bead 412 is larger than the diameter of the radially inner bead 412, but smaller than the outer diameter of the contact surface 114. This ensures that both beads 412 rest on the contact surface 114 in the closed position of the cap element 210 without being impaired by the inlet openings 313 in the outer region of the annular surface 112.

[0032] As continued in Fig. 3a, the base body 102 has a circumferential flange 130, which is arranged in a region between the first and second cylindrical sections 110, 120 of the base body 102. The flange 130 extends radially outward and has a first annular surface 132 facing the cap element 210 and a second annular surface 134 aligned parallel to the first surface 132. The radially outward-facing circumferential surface 136 of the flange 130 runs obliquely to the central axis A, so that the outer diameter of the flange 130 on its side facing the first cylindrical section 110 is smaller than the outer diameter on its side facing the second cylindrical section 120. In the embodiment shown, the surface 136 is curved inwards, but it can also be flat or curved outwards.

[0033] At the second end 110b of the first cylindrical portion 110, facing the flange 130, there is a circumferential groove 116 into which an annular portion 222 of the securing element 220 is inserted to secure it to the base body 102 against falling off and loss. Adjoining the annular portion 222 of the securing element 220 is a cord portion 224, which is attached to the closed end 212b of the cap element 210 with its end opposite the annular portion 222.

[0034] In the surface 136 of the flange 130 facing the second cylindrical section 120, an annular groove 138 is arranged, in which a further sealing ring 139 is inserted.

[0035] Furthermore, the second cylindrical portion 120 of the base body 102 has an external thread 122 on its outer surface, onto which a nut 124 can be reversibly screwed. Thus, the base body 102, for example for attachment to a housing element of a machine, can be inserted with its second cylindrical portion 110 into a corresponding bore in this housing element and screwed with the nut 124. The sealing ring 139 prevents fluid from passing through the bore in the area of the base body 100.

[0036] Fig. Figure 4a shows a second embodiment of the device 10 for establishing a cable connection. This differs from the one shown in the Fig. 1 to 3b by the design of the sealing arrangement 500. The design of the base body 102 corresponds to that described in connection with the Fig. 1 to 3b explained embodiment.

[0037] As in the Fig. 4a, Fig. As can be seen in Figure 4b, the sealing arrangement 500 comprises an annular sealing element or a sealing ring 510 in the form of an O-ring seal, as well as an annular groove 520 into which the sealing ring 510 is inserted.

[0038] The annular groove or annular groove 520 is machined into the inner surface of the closure element 214 arranged at the second end 212b of the cylindrical portion 212 of the cap element 210. Its average diameter is selected so that the sealing ring 510 in the Fig. 4a shown closing position on the contact surface 114 (cf. Fig. 2) of the first section 110 of the base body 102.

[0039] The annular groove 520 has, as can be seen particularly in detail C according to Fig. 4b, a cross-section is designed such that it tapers towards the base body 102. This secures the sealing ring 510 inserted in the annular groove 520 against falling out.

[0040] The portion of the sealing ring 510 protruding from the annular groove 520 in the closing direction V, and in particular its annular portion resting against the contact surface 114 of the first portion 110 of the base body 102 in the closing position of the cap element 210, forms a sealing portion 512 of the sealing ring 510.

[0041] Fig. Figure 5a shows a third embodiment of the device 10 for establishing a cable connection. This differs from the Fig. 1 to 4b by the design of the sealing arrangement 600. The design of the base body 102 also corresponds in this embodiment to that described in connection with the Fig. 1 to 4b explained embodiment.

[0042] As in the Fig. 5a, Fig. 5b, the sealing arrangement 600 of the third embodiment comprises an annular sealing element or a sealing ring 610 in the form of a quad ring seal, which has a total of four circumferential lamellae 612, and an annular groove 620 into which the sealing ring 610 is inserted.

[0043] The annular groove 620 is, as in the embodiment according to the Fig. 4a, Fig. 4b, incorporated into the inner surface of the closure element 214 arranged at the second end 212b of the cylindrical portion 212 of the cap element 210. The mean diameter of the annular groove 620 corresponds at least approximately to the mean diameter of the sealing ring 610, so that the latter rests on the contact surface 114 (cf. Fig. 2) of the first section 110 of the base body 102.

[0044] The cross section of the annular groove 610 corresponds to the cross section of the annular groove 510, ie it tapers towards the base body 102, whereby the sealing ring 620 inserted in the annular groove 610 is secured against falling out.

[0045] As in the Fig. As can be seen in Figure 5b, the two lamellae 612 of the sealing ring 610 facing the base body 102 protrude from the annular groove 620. These lamellae 612 form the sealing sections of the sealing ring 610 that interact with the contact surface 114.

[0046] As in connection with the Fig. 2, Fig. 3, a socket SB is accommodated in the base body 102 of the receiving unit 100, to which a cable K is connected, which emerges from the second cylindrical section 120 of the base body 102. This cable K is connected to the machine, for example to its control unit, so that data can be transmitted to or from the machine by means of the receiving unit 100 via the cable K. For this purpose, a corresponding cable connection to the machine or its control unit can be established by connecting an external device, such as a data storage device or another machine, to the receiving unit via another cable, which has a plug corresponding to the socket SB. Depending on the type and / or amount of data to be transmitted, different standard connection sockets can be selected, such as a USB socket (e.g.USB-A or USB-C), an RJ45 socket for connecting a Cat cable, for creating a data connection or a network connection, or any other suitable socket.

[0047] After completion of the data transfer, and in particular for cleaning the machine, the plug is removed from the socket SB and the receiving unit is opened by fitting the cap element 120.

[0048] The cap element 210 is placed on the first cylindrical section 110 of the base body 102 such that the guide pins 320 of the mechanical connection 300 engage the guide grooves 310 through the inlet opening 313. By displacing the cap element 210 in the closing direction V and simultaneously rotating it counterclockwise, the guide pins 310 are guided along the guide contour 316. After exceeding the high point 316a of the guide contour 316, the cap element 210 is moved slightly counter to the closing direction V.

[0049] During the placement of the cap element 210 onto the first cylindrical section 110 of the base body 102, the sealing section(s) 412, 512, 612 of the sealing unit or of the sealing ring 410, 510, 610 come into contact with the contact surface 114 of the first cylindrical section 110 and are compressed by further rotation of the cap element 210. The sealing elements 412, 512, 612 reach their maximum compressed state when the guide pins 320 reach the high point 316a of the guide contour 316. After exceeding the high point 316a until reaching the end of the second groove section 314 of the guide groove 310, the sealing elements 412, 512, 612 are slightly relieved again, but are still compressed enough to ensure their sealing function. The tightness achieved in this way meets the usual requirements with regard to splash water protection, as is necessary, for example, when cleaning the machine using a water jet.

[0050] Compared to known flat gaskets, whose sealing function relies on a maximum possible contact pressure, a reduced contact pressure between the sealing elements 412, 512, 612 and the contact surface 114 is sufficient here, making it easier to release than with known sealing connections. The high point 316a provided in the guide contour 316 prevents unintentional or spontaneous release of the connection, for example, due to machine vibrations.

[0051] The device 10 according to the invention for establishing a cable connection can be used for data transmission, as described above. Of course, it is also possible to transmit energy via it, such as low voltages, for example, via a USB connection, but also higher voltages or power. In the latter case, the socket SB would have to be adapted according to the necessary requirements.

[0052] The flat gasket 410 comprises, according to the design according to the Fig. 3a, Fig. 3b, two annular beads serve as sealing elements 412 on each of its flat sides. However, it is also possible, and sufficient for the required sealing function, if only one sealing element 613 is arranged on the side facing the contact surface 114. However, one or more than two sealing elements can also be arranged on each side of the flat ring seal 410. It is essential within the meaning of the present invention that the sealing elements facing the contact surface 114 are designed such that they only come into contact with the contact surface 114, but not with the section of the annular surface 112 lying further radially outward, so that the sealing function of the sealing elements is not impaired by the inlet openings 113.

Claims

[1] Device (10) for establishing a cable connection, comprising a receiving unit (100) for the at least one contact element (SB) enabling the cable connection, and a covering unit (200) for covering the receiving unit (100), wherein the receiving unit (100) has a base body (102) which has at least a first cylindrical portion (110) with a first and a second end (110a, 110b) and at least one second cylindrical portion (120) extending from the second end (110b) and coaxially thereto, and wherein the cover unit (200) comprises a cap element (210) with at least one cylindrical portion (212) having an open end (212a) and a closed end (212b), wherein the cover unit (200) is designed such that the cylindrical portion (212) can be reversibly placed with its open end (212a) in a closing direction (V) onto the first cylindrical portion (110) of the base body (102) and can be reversibly locked thereto by means of a mechanical connecting device (300), wherein the connecting device (300) comprises: - at least one guide groove (310) machined into the outer side of the first cylindrical section (110), which opens into an inlet opening (313) in the annular surface (112) formed by the first end (110a) of the first cylindrical section (110) and pointing counter to the closing direction (V), wherein an annular contact surface (114) extending radially inward from the inlet opening (313) of the guide groove (310) is formed on the annular surface (112), and - at least one guide pin (320) arranged on the inside of the cylindrical portion (212) of the cap element (210) of the cover unit (200), directed radially inward and engaging in the at least one guide groove (310) when the cover unit (200) is placed on the base body (102) of the receiving unit (100), further comprising a sealing arrangement (400; 500; 600) with at least one preferably at least approximately annular sealing unit (410; 510; 610) arranged on the inside of the closed end (212b) of the cap element (210), and with at least one sealing section (412; 512; 612) facing the contact surface (114) and coming into contact therewith to produce a fluid-tight seal, wherein the diameter of the at least one sealing section (412; 512; 612) is smaller than the maximum diameter of the annular contact surface (114) but larger than its minimum diameter, wherein the sealing unit (410) is a flat ring seal, with at least one annular bead arranged on the surface facing the annular contact surface (114) of the base body (102) and forming the sealing section (412), wherein preferably the sealing unit (410) has two annular beads (412) radially spaced from one another on the surface facing the annular contact surface (114) of the base body (100). [2] Device according to claim 1, wherein the sealing unit (510) is a sealing ring with a circular cross-section, the annular surface section (512) of which facing the annular contact surface (114) of the base body (100) forms the sealing section. [3] Device according to claim 1, wherein the sealing unit (610) is a quad ring with four sealing lips (612), wherein two sealing lips (612) facing the annular contact surface (114) of the base body (100) form the sealing section. [4] Device according to one of claims 1 to 3, wherein the sealing arrangement (400; 500; 600) has a circumferential groove (420; 520; 620) provided on the inside, in the region of the closed end (212b) of the cap element (210), in which the sealing unit (410; 510; 610) is received at least in sections, wherein preferably the circumferential groove (420; 520; 620) is provided on the radial inside or on the axial inside of the cap element (210). [5] Device according to one of claims 1 to 4, wherein the inlet opening (313) of the guide groove (310) has at least partially rounded edges (313a) at least in the region of its radially extending sections. [6] Device according to one of claims 1 to 5, wherein the guide groove (310) comprises at its end a holding device (316a) for securing the cap element (210) in the closing position. [7] Device according to one of claims 1 to 6, wherein the guide groove (310) has a first groove section (312) extending from the inlet opening (313) and extending in the closing direction (V) at least in sections around the first cylindrical section (110) of the base body (100), which ends in a second groove section (314) extending counter to the closing direction. [8] Device according to one of claims 1 to 7, wherein a radially outwardly extending flange (130) is arranged on the base body (100) in a region between the first cylindrical section (110) and the second cylindrical section (120), wherein an annular groove (138) with an annular sealing element (139) arranged therein is preferably provided in the surface (134) facing away from the first cylindrical section (110) of the base body (100). [9] Device according to one of claims 1 to 8, wherein the cover unit (200) has a securing element (220) for securing the cap element (210) to the receiving unit and / or wherein an external thread (122) is arranged on the outer surface of the second cylindrical portion (120) of the base body (100), onto which thread a nut (124) can be screwed.

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