DE202023107478U1 - Electrical connection, connecting part of an electrical connection and combination of a connecting part and a connecting means - Google Patents

Abstract

Electrical connection with a first and a second connecting part (1, 2), wherein the first connecting part (1) and the second connecting part (2) have a first and a second line part (4, 9) for conducting electrical current, wherein the first and the second line part (4, 9) further have a first and a second line section (10, 15) which are exposed to the outside and which are in electrically conductive contact in a connected state, wherein the first line part (4) has an opening (16, 46) in the line section (15) for receiving a connecting means (3) for securing the first connecting part (1) to the second connecting part (2) in the connected state, wherein further on the first connecting part (1) and on the second connecting part (2) radially surrounding the line section (10, 15) there are each formed a first and a second peripheral wall (26, 34) consisting of electrically insulating material (21), characterized in that
- that the first and second peripheral walls (26, 34) have an inner diameter (d, d') which is 12.5 mm or smaller,
- that the first and second line sections (10, 15) are designed like sleeves, with central axes (x, x') of the first and second sleeves (17, 31) resulting in the connection direction (R),
- that the connecting means (3) is a screw (39) with a screw head (40) and a screw shaft (41) provided with a thread (42),
- that the line section (15) and/or the line part (4) of the first connecting part (1) has a contact surface (19) for the screw head (40) and
- that the second sleeve (31) formed on the second connecting part (2) has a counter thread (32) for the screw shaft (41).

Description

Field of technology

The invention relates to an electrical connection with a first and a second connecting part, wherein the first connecting part and the second connecting part have a first and a second line part for conducting electrical current, wherein the first and the second line part further have a first and a second line section which are exposed to the outside and which are in electrically conductive contact in a connected state, wherein the first line part has an opening in the line section for receiving a connecting means for securing the first connecting part to the second connecting part in the connected state, wherein a first and a second peripheral wall made of electrically insulating material is formed on the first connecting part and on the second connecting part radially surrounding the line section.

The invention further relates to a connecting part of an electrical connection, wherein the connecting part has a line part for conducting electrical current, wherein the line part further has an outwardly exposed line section which, in a connected state, is in electrically conductive contact with a line part of a further connecting part, wherein the line part has an opening in the line section for receiving a connecting means for securing the connecting part to the further connecting part in the connected state, wherein a peripheral wall made of electrically insulating material is further formed on the connecting part radially surrounding the line section.

The invention also relates to a connecting part of an electrical connection, wherein the connecting part has a line part for conducting electrical current, wherein the line part further has an outwardly exposed region forming a contact surface which, in a connected state, can be brought into electrical contact with a line part of a further connecting part, wherein the line part has an opening with a central axis in the region for receiving a connecting means for securing the connecting part to the further connecting part in the connected state, wherein the connecting part further has a surround made of electrically insulating material surrounding the opening.

The invention also relates to a combination of a connecting part and a connecting means.

State of the art

Electrical connections, a connecting part and a combination of a connecting part and a connecting means of the type in question are known. These are used, for example, in the automotive sector, for example in connection with an electrical connection for connecting a conductor to a starter battery or a drive battery of a motor vehicle or the like. Further, for example, reference is made to the EN 10 2016 100 978 A1 or on the EN 10 2013 005 106 B3 referred to.

Summary of the invention

In view of the state of the art described above, the object is to further develop an electrical connection as well as a connecting part and a combination of an electrical connection in an advantageous manner.

A possible solution to the problem is provided according to a first inventive concept in an electrical connection in which the first and second peripheral walls have an inner diameter that is 12.5 mm or smaller, the first and second line sections are designed like sleeves, with center axes of the first and second sleeves resulting in the connection direction, the connecting means is a screw with a screw head and a screw shaft provided with a thread, the line section and/or the line part of the first connecting part has a contact surface for the screw head and the second sleeve formed on the second connecting part has a counter thread for the screw shaft.

With regard to the connecting part, a possible solution is provided according to a further inventive concept, in which the circumferential wall has an inner diameter of 12.5 mm or smaller, the line section is designed like a sleeve, the sleeve has a counter thread for screwing in a screw forming the connecting means and the connecting part is designed as an independently manageable component with one or more fastening recesses.

According to a further inventive idea, a possible solution with regard to the connecting part can also be provided by the circumferential wall having an inner diameter of which is 12.5 mm or smaller, that the line section is sleeve-like, that the line section has a contact surface for cooperation with a screw head of a screw forming the connecting means in the connected state, and that the connecting part forms an end region of a cable.

According to the proposed design, an electrical connection can be achieved between two connecting parts, whereby each connecting part of the electrical connection or a connecting part of an electrical connection satisfies protection class IP 20 due to the selected diameter of the respective peripheral wall. The inner diameter of the peripheral wall made of electrically insulating material is dimensioned at 12.5 mm or less so that contact protection is provided.

The sleeve-like design of the line section conveniently provides a guide for the connecting means as it passes through the opening provided in the line section, whereby the opening can optionally be defined solely by the area enclosed by the sleeve casing. The sleeve can, as is also preferred, be an essential component for creating the electrical connection between the connecting parts. Accordingly, the sleeve is preferably made of a material that conducts electricity well, such as copper.

The design of the connecting means as a screw with a screw head and a screw shaft advantageously offers a mechanical connection of the connecting parts that can only be removed intentionally and, more preferably, only with the aid of a tool. The screw, which penetrates at least the sleeve of one connecting part, more preferably both sleeves of both connecting parts, can be used to brace the connecting parts in the direction of the central axis of one and/or the other sleeve in order to create an electrical connection.

An electrical connection between the connecting parts can also be achieved at least in addition via the connecting means, preferably in the form of a screw. For this purpose, the line section and/or the line part of one of the connecting parts can also have a contact surface for the screw head, which contact surface initially and essentially serves to brace the connecting parts against each other, but also optionally to establish an indirect electrical connection between the connecting parts, for which purpose the further connecting part or the sleeve provided on this connecting part has a counter thread for the screw shaft.

One connecting part, for example the first connecting part of the electrical connection, can form an end region of a cable, which cable has an electrically insulating sheath. The line section of the connecting part is electrically connected to the wires of the cable that have been freed from the sheath at the end, and this line section is furthermore essentially completely surrounded by the electrically insulated material, leaving the opening and the sleeve free. For example, an overmolding with an insulating material can be provided in this regard. In the course of producing this insulation on the connecting part side, the peripheral wall is also formed. This can, as is also preferred, be formed in one piece and of the same material as the other electrically insulating material of the connecting part.

The further connecting part, which can be the second connecting part of the electrical connection, can also be designed as an independently manageable component which can be attached to an assembly or the like to be electrically contacted, for example to a battery or the like. Accordingly, in addition to the electrical connection, there is preferably also a mechanical connection between the connecting part and the assembly or the like, for which purpose the component can further have one or more fastening recesses, for example in the form of holes, through which a screw fastening can be carried out, for example.

With regard to the connecting part, according to a further solution to the problem, it is provided that the enclosure has a locking formation for locking connection with a connecting means.

As a result of such a design, the connecting means can already be held on one connecting part, at least in the course of a connection between two connecting parts that is to be achieved with this. The connecting means can also be held captive on the connecting part.

The connecting means can be freely rotatable about the central axis of the opening in the locking formation of the connecting part.

With regard to the combination of a connecting part, in particular a connecting part as described above and/or below, and a connecting means, it is provided to achieve the object that the connecting means has a counter-locking formation.

The counter-locking formation can be designed for connecting interaction with a locking formation of the connecting part. In particular, interaction with a locking formation of a connection-part-side enclosure is possible in this context.

The locking connection achieved in this way between the connecting means and the connecting part can be established by the user, if necessary without tools, and can also be removed if necessary.

The connecting means is preferably freely rotatable about the central axis of the opening in the locking connection position in order to be able to establish or remove a screw fastening.

The features of the above-described independent claims are significant both individually and in any combination with one another, whereby further features of an independent claim can be combined with the features of another independent claim or with features of several independent claims, and also with only individual features of one or more of the other independent claims.

Further features are explained below, also in the description of the figures, often in their preferred assignment to the solution described in principle and/or the solutions described in principle further or to further features. However, they can also be important in an assignment to only individual features already described or to the respective feature described further or each independently.

The peripheral wall of one connecting part, in particular the second peripheral wall of the second connecting part, can be designed such that it extends radially inside the peripheral wall of the other connecting part, in particular the first peripheral wall, when the connecting parts are connected. In this case, a labyrinth-like interaction of the peripheral walls of both connecting parts can occur in the connected state, which can preferably result in a dust- and/or liquid-tight connection.

The sleeve of the connecting part, more preferably both sleeves of the connecting parts, can have an end face, so the first connecting part has a first end face and the second connecting part has a second end face. The end face preferably extends in a plane directed transversely to the center axis of the sleeve, whereby the sleeve-like design preferably results in a circular ring surface which is delimited radially on the inside by the inner wall of the sleeve and radially on the outside by the outer wall of the sleeve.

In a preferred design of the same diameter for the first and second sleeves, the first and second end faces are preferably of the same shape and preferably lie against one another over their entire surface in the connecting position.

These end faces of the sleeves are aligned facing each other in the connection direction, i.e. in the usual plug-in direction of the first plug-type connection part in the direction of the second connection part. In the connected state, these end faces of the connection parts lie against each other to achieve the electrical connection between the connection parts. In this regard, it is preferred that the end faces lie against each other over the entire surface. Bracing the connection parts against each other via the connecting means, in particular via the screw, supports the flat, in particular full-surface, abutment and the electrical connection of the sleeves achieved thereby.

An electrically insulating material can also be provided surrounding the sleeve of a connecting part, in particular surrounding the second sleeve of the second connecting part, which in a preferred embodiment can rest on the sleeve on the outside of the wall and can extend in continuation of this contact beyond the end face of this sleeve, correspondingly preferably beyond the second end face of the second sleeve. This essentially axial extension in the direction of the central axis of the sleeve can also take place with corresponding contact on the outside of the wall on the sleeve, wherein, as is also preferred, the section of the insulating material extending in the axial direction can form the electrically insulating peripheral wall in one piece and of the same material as the insulating material surrounding the sleeve as a whole.

With regard to the connecting part, in particular with regard to the electrical connection with regard to the first connecting part, the insulating material provided surrounding the sleeve, in particular surrounding the first sleeve, can transition radially outwards below the first end face into a surrounding surface which extends approximately at right angles to the central axis of the first sleeve. This surrounding surface is preferably formed on the base side of the sleeve, and so on accordingly with an axial distance from the sleeve end face.

In a further embodiment, as is also preferred, the surrounding area can be directly the peripheral wall. Here too, a one-piece and uniform design of the electrically insulating material with the peripheral wall is preferably provided. The peripheral wall resulting at a radial distance from the sleeve can, viewed in the axial direction, further preferably extend beyond the end face of the relevant sleeve, in particular the first sleeve.

According to a preferred embodiment, the axial projection dimension of the peripheral wall beyond the end face of the associated sleeve can correspond to approximately 0.1 to 0.5 times, further approximately 0.15 to 0.3 times, and further, for example, approximately 0.17 to 0.2 times the inner diameter of the peripheral wall in the region of the opening plane resulting in the free end region of the peripheral wall.

The electrically insulating material, and accordingly preferably also the peripheral wall of a connecting part, can be a thermoplastic elastomer according to a preferred embodiment, which can advantageously be applied by overmolding the line part. Examples of thermoplastic elastomers that can be used are TPA, TPC, TPO, TPS, TPU and TPV.

In the connected state of the connecting parts, an outer surface of the peripheral wall of one connecting part, in particular the outer surface of the second peripheral wall of the second connecting part, advantageously interacts with an inner surface of the peripheral wall of the other connecting part, in particular with the inner surface of the first peripheral wall of the first connecting part. This results in a labyrinth-like seal which, in the connected position, can offer sufficient protection against the ingress of dust and at the same time permanent protection against the ingress of moisture, even when submerged, in accordance with protection class IP 68.

The interacting surfaces, the outer surface of one peripheral wall and the inner surface of the other peripheral wall, can be designed to taper conically or to expand conically in an adapted manner with respect to the respective sleeve center axis in the direction of the opening plane of the peripheral wall, whereby the sealing contact of the surfaces with one another, in particular as a result of clamping via a screw, is advantageously further improved.

One or both connecting parts of an electrical connection or the connecting part for establishing an electrical connection can have a coding, for example to distinguish whether the respective connecting part can be assigned to a positive or negative connection point system. This coding can be done mechanically using different dimensions, such as diameters and/or axial heights, using coding lugs or grooves. A distinction can also be made in this regard using the respective color design of the connecting part, for example the electrically insulating material surrounding the line part, or by means of symbols.

The enclosure of the connecting part can have a sealing bead, preferably running around the central axis, for sealing interaction with a facing surface of another connecting part or a connecting means in the connecting position. The locking formation can be designed with a radial distance from the sealing bead with respect to the central axis. The locking connection can accordingly be accessible by surrounding the sealing bead radially on the outside.

The locking formation can also be designed in the direction of the elevation of the sealing bead at an axial distance from the sealing bead. This can result in an axial height offset between the sealing plane to be achieved in the area of the exposed area of the sealing bead and a plane or set of planes in the area of the locking connection to be achieved.

According to a possible further development, the counter-locking formation of the connecting means can be designed as a bead section that projects radially outwards. This bead section can be designed as one piece and/or made of the same material as the sections of the connecting means that are immediately adjacent to it.

In a preferred embodiment, the counter-locking formation, in particular the bead section, is made of an electrically insulating material. This material can, if necessary in the form of a cap, cover the area that would otherwise be exposed to the outside after the connection position has been established.

In one embodiment, the connecting means can be a screw nut with a screw shaft receptacle having a counter thread.

Alternatively, the fastener may be a screw with a screw head and a threaded screw shaft.

The ranges or value ranges or multiple ranges specified above and below exclude the open agreement also includes all intermediate values, in particular in 1/10 steps of the respective dimension, and possibly also dimensionless. For example, the specification 0.1 to 0.5 times also includes the disclosure of 0.2 to 0.5 times, 0.1 to 0.4 times, 0.2 to 0.4 times, etc. This disclosure can be used on the one hand to delimit a specified range limit from below and/or above, but alternatively or additionally also to disclose one or more singular values from a respectively specified range.

Short description of the drawings

• 1 in perspektivischer Darstellung ein erstes Verbindungsteil und ein zweites Verbindungsteil zur Bildung einer elektrischen Verbindung, betreffend eine erste Ausführungsform;
• 2 den Schnitt entlang der Linie II-II in 1 durch das erste Verbindungsteil, das zweite Verbindungsteil und ein Verbindungsmittel;
• 3 die Herausvergrößerung des Bereiches III in 2;
• 4 die Herausvergrößerung des Bereiches IV in 2;
• 5 eine Schnittdarstellung gemäß 2, jedoch die Verbindungsstellung der Verbindungsteile und des Verbindungsmittels betreffend;
• 6 die Herausvergrößerung des Bereiches VI in 5;
• 7 die Vergrößerung des Bereiches VII in 6;
• 8 das Verbindungsteil mit dem zugeordneten Verbindungsmittel in einer Schnittdarstellung gemäß 2, betreffend eine zweite Ausführungsform;
• 9 die Vergrößerung des Bereiches IX in 8;
• 10 eine der 5 entsprechende Schnittdarstellung, betreffend die Ausführungsform gemäß 8;
• 11 eine der 10 entsprechende Schnittdarstellung, jedoch betreffend eine dritte Ausführungsform;
• 12 in einer Schnittdarstellung das Verbindungsmittel in Form einer Schraube;
• 13 in einer Schnittdarstellung das Verbindungsmittel in Form einer Schraubmutter.

The invention is explained in more detail below with reference to the attached drawing, which only shows exemplary embodiments. A part that is only explained in relation to one of the exemplary embodiments and is not replaced by another part in a further exemplary embodiment due to the special feature highlighted there, is therefore also described for this further exemplary embodiment as a possible existing part. It shows:

• 1 in perspective view a first connecting part and a second connecting part for forming an electrical connection, relating to a first embodiment;
• 2 the section along the line II-II in 1 by the first connecting part, the second connecting part and a connecting means;
• 3 the enlargement of area III in 2 ;
• 4 the enlargement of area IV in 2 ;
• 5 a sectional view according to 2 , but concerning the connection position of the connecting parts and the connecting means;
• 6 the enlargement of area VI in 5 ;
• 7 the enlargement of area VII in 6 ;
• 8th the connecting part with the associated connecting means in a sectional view according to 2 , concerning a second embodiment;
• 9 the enlargement of area IX in 8th ;
• 10 one of the 5 corresponding sectional view, concerning the embodiment according to 8th ;
• 11 one of the 10 corresponding sectional view, but concerning a third embodiment;
• 12 in a sectional view the connecting element in the form of a screw;
• 13 a sectional view of the connecting element in the form of a screw nut.

Description of the embodiments

Shown and described is, first of all, with reference to 1 , an arrangement of two connecting parts, a first connecting part 1 and a second connecting part 2, for establishing an electrical connection using a, in 2 shown, connecting means 3.

The first connecting means 1 essentially consists of a first line part 4, which is electrically connected to an end region 5 of a cable 6.

The second connecting means 2 is formed as an independently manageable component 7, preferably comprising a mounting plate 8 and a second line part 9, which is electrically connected to a second electrical line section 10 exposed to the outside. The mounting plate 8 can be provided with fastening recesses 11, preferably in the form of bores, via which, for example, a screw fastening of the component 7 to an assembly, for example a battery, can be achieved.

The cable 6 of the first connecting part 1 has one or more electrically conductive wires 12 in the center, which are surrounded by an insulating sheath 13 made of an insulating plastic material, for example a radiation-crosslinked polyurethane. The cross section of the cable 6 is preferably circular.

The end of the cable 6 freed from the insulating sheath 13 is electrically connected to the first line part 4. For this purpose, the wire or wires 12 can engage in a tubular connection area 14 of the line part 1 (not shown here), for example a crimp section. This can be a cable lug. It can also be a connection to a flat conductor, as in the exemplary embodiment shown. In this section, a compression can be provided to provide electrical conductivity and to mechanically fix the first line part 4 to the cable 6. In this respect, a solder connection of the wires 4 freed from the insulating sheath 13 in this connection area 14 is also possible.

The first line part 4 can run freely in the manner of a connection lug and have a bore-like opening 16 exposed to the outside. A sleeve-shaped first line section 15 is connected to one side of the first line part 4, surrounding the opening 16. This is preferably connected to the first line part 4 in an electrically conductive manner, for example by soldering. A one-piece design of the line part 4 and sleeve 17 to form the first line section 15 is also possible in this regard.

The first sleeve 17 of the first line part 4 has an inner sleeve wall 18 which runs concentrically to its central axis x and which, in a preferred embodiment, runs congruently with the opening edge of the opening 16 when viewed in the axial direction. It can be a cylindrical surface.

Opposite the sleeve 17, in the area of the exposed surface of the first line part 1, there is a contact surface 19 surrounding the opening 16.

The contact surface 19 as well as an end face 20 of the first sleeve 17 in the region of its free end facing away from the contact surface 19 extend transversely to the central axis x of the sleeve 17 as well as to the opening 16.

In particular for electrical insulation, the first line part 4 is surrounded by an electrically insulating material 21. This can, as is also preferred, be a thermoplastic elastomer, which is more preferably applied by overmolding the first line part 4. The material 21 surrounds the first line part 4 essentially completely, in particular also surrounding the connection region 14 and the end region 5 of the cable 4, in particular the insulation jacket 13.

In the area of the opening 16, an opening area 22 with an inner diameter that is larger than the opening 16 is formed concentrically to the central axis x in the area facing away from the first sleeve 17. This opening area 22 exposes the aforementioned contact surface 19 of the first line part 4.

A sealing bead 23 can be formed surrounding the opening edge of the opening area 22.

Viewed in the axial direction opposite the opening region 22, the material 21 underpins the first line part 4 until it rests on the sleeve outer wall 24. Viewed in the axial direction, below the end face 20 of the first sleeve 17, there is a surrounding surface 25 of the material 21 which surrounds the sleeve 17 and runs essentially at right angles to the central axis x, which is delimited radially on the inside by the sleeve 17 and radially on the outside by a first peripheral wall 26.

The first peripheral wall 26 is preferably formed in one piece and of the same material as the electrically insulating material 21 and extends, starting from the surrounding surface 25, in the axial direction beyond the end face 20 of the first sleeve 17. This can result in a projection dimension a beyond the end face 20, viewed in the axial direction, which can correspond to approximately 0.15 to 0.2 times the largest inner diameter d of the first peripheral wall 26 (see 3 ).

The outer surface 27 of this first peripheral wall 26 can, with reference to a section through the peripheral wall 26 according to 3 , in which section the central axis x is shown as a line, starting from the surrounding surface 25, including an angle of preferably 90° to the surrounding surface 25, correspondingly with a parallel alignment to the central axis x. The corresponding inner surface 28, however, can, as is also preferred, start from the surrounding surface 25 and widen conically towards the free end of the peripheral wall 26. This can result in an acute angle a between the inner surface 28 and the surrounding surface 25 of approximately 80° to 85°.

Between the inner surface 28 of the first peripheral wall 26 and the outer wall 24 of the first sleeve 17, an annular chamber-like immersion region 35 is formed, associated with the surrounding surface 25, due to the above-described arrangement.

The second line section 10 of the second connecting part 2 can, as also shown, be designed like a sleeve, with an inner wall 29 and an outer wall 30 of the second sleeve 31. The sleeve 31 is electrically connected to the second line part 9, for example via a soldered connection or due to a possible one-piece, uniform material design.

The central opening 46 resulting in the sleeve is preferably pot-shaped and provided with a counter thread 32.

The counter thread 32 ends in a second end face 33 running transversely to the central axis x' of the second sleeve 31.

The mounting plate 8 of the component 7 forming the second connecting part 2 can be directly be formed by an electrically insulating material 21 or alternatively be covered or surrounded by it. Preferably in one piece and of the same material as this material 21, a second peripheral wall 34 is also formed in the second connecting part 2, which surrounds the sleeve 31 and runs concentrically to the relevant central axis x'.

The peripheral wall 34 preferably lies directly with its inner surface 36 against the facing outer wall 30 of the second sleeve 31. The outer surface 37 of the second peripheral wall 34 extends with reference to a sectional view according to 4 at a preferably identical acute angle α to a plane oriented transversely to the central axis x' as the inner surface 28 of the first peripheral wall 26. This results in a conically tapering course of the outer surface 37 in relation to the outer surface 37 in the direction of the free end of the second peripheral wall 34.

In a further embodiment, the second peripheral wall 34 is also designed to extend beyond the associated second end face 33 of the sleeve 31, with a projection dimension a' viewed in the axial direction, which here too can correspond to approximately 0.15 to 0.25 times the inner diameter d' of the second peripheral wall 34.

To establish an electrical connection, the two connecting parts 1 and 2 are brought into a connecting position in the direction of their central axes x and x' (connecting direction R), in particular by plugging the first connecting part 1 onto the second connecting part 2. The first peripheral wall 26 of the first connecting part 1 overlaps the second peripheral wall 34 of the second connecting part 2.

In the connection position as shown in the 5 and 6 the end faces 20 and 33 of the sleeves 17 and 31 lie flat against one another, so that an electrical connection of the connecting parts is achieved. A free end section 38 of the second peripheral wall 34, which projects beyond the end face 33 of the second connecting part 2, engages in the annular immersion area 35 of the first connecting part 1, this with a sealing contact with the outer surface 37 of the second peripheral wall 34 on the inner wall 28 of the first peripheral wall 26 (see also enlarged illustration in 7 ).

As can be seen particularly from the magnification in 7 As can be seen, the axial lengths of the peripheral walls 26 and 34 are preferably selected such that in the connecting position they preferably do not come into contact with the facing transverse surface of the opposite connecting part. Instead, a small distance of, for example, a few tenths of a millimeter can be left, which ensures that in the connecting position the end faces 20 and 33 establishing the electrical connection lie against one another over their entire surface.

Due to the labyrinth-like nesting of the peripheral walls 26 and 34 of both connecting parts 1 and 2, a highly effective seal of the connection area against the ingress of dust and/or moisture in accordance with protection class IP 68 is provided. In addition, both inner diameters d and d' of the peripheral walls 26 and 34 surrounding the line parts 9 and 4 are dimensioned with a diameter of 12.5 mm or less so that before a connection of the connecting parts 1 and 2 is made, each connecting part 1 and 2 has appropriate contact protection in accordance with protection class IP 20.

The connection position (plug-in position) of the connecting parts 1 and 2 is secured by the connecting means 3. This is preferably designed in the form of a screw 39 with a screw head 40 and a screw shaft 41. The screw shaft 41 has a thread 42 adapted to the counter thread 32 of the second sleeve 31.

The screw head 40 can, as is also preferred, be surrounded by a further electrically insulating material 21', which can be provided with wrench surfaces 43 on the outside of the wall in the usual way.

The screw head 40 can, as also shown, have a support section 44 which is otherwise of reduced diameter compared to the screw head 40. In terms of an outer diameter and its axial length, this is essentially adapted to the diameter and the axial height of the opening region 22 of the first connecting part 1 left by the material 21.

To determine the connection position, the screw shaft 41 is inserted through the opening area 22 and the opening 16 and accordingly further through the first sleeve 17 for the final screw connection with the second sleeve 31 of the second connection part 2. In the connection position achieved, the support section 44 rests with its free end face preferably over its entire surface and flat on the facing contact surface 19 of the first line section 15, whereby an electrical connection to the second line section 10 can also be achieved via the first line section 15 and the screw 39. At the same time This results in an axially acting tension of the connecting parts 1 and 2, in particular their sleeves 17 and 31, against each other.

Furthermore, in the connecting position, the screw head 40 lies sealingly against the sealing bead 23 of the first connecting part 1 in the region of a step region 45 adjoining the support section 44.

As can be seen from the illustrations in the 8 to 13 As can be seen, the first connecting part 1 and the connecting means 3 can be connected in a locking or snap-on manner. As shown, this connection can already be made before a connection is made between the connecting parts 1 and 2, but alternatively it can also be made during the production process or when the connection position is reached, preferably automatically.

Here, too, a region B of the first line part 4 having the opening 16 is provided with a casing 47 made of electrically insulating material 21 surrounding the opening 16, which forms a sealing bead 23 coaxially to the opening 16 and, in the connecting position, optionally also coaxially to a support section 44 of the connecting means 3.

A locking formation 48 is formed on the connecting part side in the region of the enclosure 47, spaced radially outward from the sealing bead 23, as well as axially from the sealing bead 23 in the direction of the elevation of the sealing bead 23. This has a locking recess 54 which is open radially inward and preferably runs all the way around the central axis x.

There may be a radial distance e between a cross-section according to, for example, 8th resulting zenith of the sealing bead 23 and a radially outer wall of the locking recess 54, which can, for example, correspond to approximately 0.5 to 0.9 times the radial distance g of this zenith region of the sealing bead 23 to the central axis x.

An axial distance c between the zenith region of the sealing bead 23 and a center of the axial extension of the locking recess 54 viewed in the axial direction can, for example, correspond to approximately 0.15 to 0.5 times the previously described radial distance g.

The area of the enclosure 47 having the locking formation 48 can be designed as a whole in a pot-like manner with an insertion opening 55 directed away from the first line part 4 and formed coaxially to the opening 16.

On the outside of the wall of the electrically insulating material 21' of the connecting means 3, a counter-locking formation 49 in the form of a bead section 50 is formed all the way around in the area of the key surfaces 43. The counter-locking formation 49 can, as is also preferred, be formed in one piece and of the same material as the rest of the material 21'.

The counter-locking formation 49 is associated with the lower edge of the material 21', more preferably associated with a possible step region 45.

The connecting means 3 can, as in the 8th and 9 shown, already before the connection is made on the first connecting part 1. In this locking position, the bead section 50 of the connecting means 3 sits in the locking recess 54 of the first connecting part 1. In particular, when the connecting means 3 is designed as a screw 39, the connecting means 3 is freely rotatable about the central axis x (see double arrow f in 8th ), so that in this locking position a screw connection can be made with the second connecting part 2, which then already provides complete insulation to the outside.

As can be seen from the illustration in 11 As can be seen, the above-described locking of the connecting means 3 on the first connecting part 1 is also possible with a connecting part 1 without the above-described peripheral walls 26 and/or 34 and/or without a first sleeve 17.

12 shows a connecting means 3 with a counter-locking formation 49 in the form of a screw 39 with a screw shaft 41 having a thread 42. Such a connecting means 3 serves to produce an electrical connection of the first connecting part 1 with a second connecting part 2 having a threaded bore.

Alternatively, the connecting means 3 can also, as in 13 shown, be designed in the manner of a screw nut 51 with a screw nut head 56 and a screw shaft receptacle 53 having a counter thread 52. Such a connecting means 3 serves to produce an electrical connection of the first connecting part 1 with a second connecting part 2 having a screw shaft.

The above statements serve to explain the inventions covered by the application as a whole, which also independently develop the state of the art at least through the following combinations of features, whereby two, several or all of these combinations of features can also be combined, namely:

A connection which is characterized in that the first and second peripheral walls 26, 34 have an inner diameter d, d' which is 12.5 mm or smaller, that the first and second line sections 10, 15 are sleeve-shaped, with central axes x, x' of the first and second sleeves 17, 31 resulting in the connection direction R, that the connecting means 3 is a screw 39 with a screw head 40 and a screw shaft 41 provided with a thread 42, that the line section 15 and/or the line part 4 of the first connecting part 1 has a contact surface 19 for the screw head 40 and that the second sleeve 31 formed on the second connecting part 2 has a counter thread 32 for the screw shaft 41.

A connection which is characterized in that the second peripheral wall 34 extends radially inside the first peripheral wall 26 in the connected state of the connecting parts 1, 2.

A connection characterized in that the sleeves 17, 31 have a free first and second end face 20, 33.

A connection which is characterized in that the end faces 20, 33 lie on one another in the connected state of the connecting parts 1, 2.

A connection which is characterized in that an insulating material 21 provided surrounding the second sleeve 31 initially rests against the second sleeve 31 and then extends beyond the second end face 33 of the second sleeve 31.

A connection which is characterized in that the insulating material 21 surrounding the first sleeve 17 below the first end face 20 merges radially outward into a surrounding surface 25 which extends approximately at right angles to the central axis x of the first sleeve 17.

A connection characterized in that the surrounding surface 25 is directly delimited by the first peripheral wall 26.

A compound characterized in that the electrically insulating material 21 is a thermoplastic elastomer.

A connection which is characterized in that, in the connected state, an outer surface 37 of the second peripheral wall 34 cooperates in a sealing manner with an inner surface 28 of the first peripheral wall 26.

A connecting part which is characterized in that the peripheral wall 26 has an inner diameter d which is 12.5 mm or smaller, that the line section 15 is sleeve-like, that the line section 15 has a contact surface 19 for cooperation with a screw head 40 of a screw 39 forming the connecting means 3 in the connected state and that the connecting part 1 forms an end region 5 of a cable 6.

A connecting part, characterized in that the sleeve 17 has a free end face 20.

A connecting part, which is characterized in that the insulating material 21 surrounding the sleeve 17 below the end face 20 merges radially outward into a surrounding surface 25 which extends approximately at right angles to the central axis x of the sleeve 17.

A connecting part, which is characterized in that the surrounding surface 25 is directly limited by the peripheral wall 26.

A connecting part characterized in that the electrically insulating material 21 is a thermoplastic elastomer.

A connecting part, which is characterized in that the peripheral wall 34 has an inner diameter d' which is 12.5 mm or smaller, that the line section 10 is designed like a sleeve, that the sleeve 31 has a counter thread 32 for screwing in a screw 39 forming the connecting means 3 and that the connecting part 2 is designed as an independently handleable component 7, with one or more fastening recesses 11.

A connecting part characterized in that the sleeve 31 has a free end face 33.

A connecting part which is characterized in that the insulating material 21 provided surrounding the sleeve 31 initially rests against the sleeve 31 and then extends beyond the end face 33 of the sleeve 31.

A connecting part characterized in that the electrically insulating material 21 is a thermoplastic elastomer.

A connecting part, which is characterized in that the enclosure 47 has a locking shape mation 48, for locking connection with a connecting means 3.

A connecting part which is characterized in that the enclosure 47 forms a sealing bead 23 and that the locking formation 48 is formed with respect to the central axis x at a radial distance e from the sealing bead 23.

A connecting part, which is characterized in that the locking formation 48, the sealing bead 23, is formed axially spaced from the sealing bead 23 in the direction of an elevation of the sealing bead 23.

A combination which is characterized in that the connecting means 3 has a counter-locking formation 49.

A combination which is characterized in that the counter-locking formation 49 is designed as a bead section 50 projecting radially outwards.A combination which is characterized in that the counter-locking formation 49 is formed from an electrically insulating material 21'.A combination which is characterized in that the connecting means 3 is a screw nut 51 with a screw shaft receptacle 53 having a counter thread 52.

A combination characterized in that the connecting means 3 is a screw 39 with a screw head 40 and a screw shaft 41 provided with a thread 42.

All disclosed features are essential to the invention (individually, but also in combination with one another). The disclosure content of the associated/attached priority documents (copy of the prior application) is hereby fully included in the disclosure of the application, also for the purpose of incorporating features of these documents in claims of the present application. The subclaims characterize, even without the features of a referenced claim, with their features independent inventive developments of the prior art, in particular in order to make divisional applications based on these claims. The invention specified in each claim can additionally have one or more of the features provided in the above description, in particular with reference numbers and/or specified in the list of reference numbers. The invention also relates to designs in which individual features mentioned in the above description are not implemented, in particular insofar as they are clearly dispensable for the respective intended use or can be replaced by other technically equivalent means.

List of reference symbols

1

first connecting part

2

second connecting part

3

Connecting elements

4

first line section

5

End area

6

Cable

7

Component

8th

Mounting plate

9

second line section

10

second line section

11

Mounting recess

12

wire

13

Insulation jacket

14

Connection area

15

first line section

16

opening

17

first sleeve

18

Inner wall

19

Contact surface

20

first frontal surface

21

material

21'

material

22

Opening area

23

Sealing bead

24

Exterior wall

25

Surrounding area

26

first peripheral wall

27

Exterior surface

28

Inner surface

29

Inner wall

30

Exterior wall

31

second sleeve

32

Counter thread

33

second front surface

34

second peripheral wall

35

Immersion area

36

Inner surface

37

Exterior surface

38

End section

39

screw

40

Screw head

41

Screw shaft

42

thread

43

Key area

44

Support section

45

Step area

46

opening

47

Enclosure

48

Latching formation

49

Counter-locking formation

50

Bead section

51

Screw nut

52

Counter thread

53

Screw shaft holder

54

Recessed recess

55

Insertion opening

56

Screw nut head

a

Overhang dimension

a'

Overhang dimension

c

axial distance

d

Inner diameter

d'

Inner diameter

e

radial distance

e

Direction of rotation

G

radial distance

x

Central axis

x'

Central axis

B

Area

R

Connection direction

α

angle

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 102016100978 A1 [0005]
• DE 102013005106 B3 [0005]

Claims (27)

Electrical connection with a first and a second connecting part (1, 2), wherein the first connecting part (1) and the second connecting part (2) have a first and a second line part (4, 9) for conducting electrical current, wherein the first and the second line part (4, 9) further have a first and a second line section (10, 15) which are exposed to the outside and which are in electrically conductive contact in a connected state, wherein the first line part (4) has an opening (16, 46) in the line section (15) for receiving a connecting means (3) for securing the first connecting part (1) to the second connecting part (2) in the connected state, wherein further on the first connecting part (1) and on the second connecting part (2) radially surrounding the line section (10, 15) there are each formed a first and second peripheral wall (26, 34) consisting of electrically insulating material (21), characterized in that - the first and second peripheral walls (26, 34) has an inner diameter (d, d') which is 12.5 mm or smaller, - that the first and second line sections (10, 15) are sleeve-like, with central axes (x, x') of the first and second sleeves (17, 31) resulting in the connection direction (R), - that the connecting means (3) is a screw (39) with a screw head (40) and a screw shaft (41) provided with a thread (42), - that the line section (15) and/or the line part (4) of the first connecting part (1) has a contact surface (19) for the screw head (40) and - that the second sleeve (31) formed on the second connecting part (2) has a counter thread (32) for the screw shaft (41). Connection to Claim 1 , characterized in that the second peripheral wall (34) extends radially inside the first peripheral wall (26) in the connected state of the connecting parts (1, 2). Connection according to one of the preceding claims, characterized in that the sleeves (17, 31) have a free first and second end face (20, 33). Connection according to one of the preceding claims, characterized in that the end faces (20, 33) lie on one another in the connected state of the connecting parts (1, 2). Connection according to one of the preceding claims, characterized in that an insulating material (21) provided surrounding the second sleeve (31) initially rests against the second sleeve (31) and then extends beyond the second end face (33) of the second sleeve (31). Connection according to one of the preceding claims, characterized in that the insulating material (21) surrounding the first sleeve (17) below the first end face (20) merges radially outward into a surrounding surface (25) which extends approximately at right angles to the central axis (x) of the first sleeve (17). Connection according to one of the preceding claims, characterized in that the surrounding surface (25) is directly delimited by the first peripheral wall (26). Connection according to one of the preceding claims, characterized in that the electrically insulating material (21) is a thermoplastic elastomer. Connection according to one of the preceding claims, characterized in that in the connected state an outer surface (37) of the second peripheral wall (34) cooperates in a sealing manner with an inner surface (28) of the first peripheral wall (26). Connecting part (1) of an electrical connection, wherein the connecting part (1) has a line part (4) for conducting electrical current, wherein the line part (4) further has an outwardly exposed line section (15) which, in a connected state, is in electrically conductive contact with a line part (9) of a further connecting part (2), wherein the line part (4) has an opening (16) in the line section (15) for receiving a connecting means (3) for securing the connecting part (1) to the further connecting part (2) in the connected state, wherein a peripheral wall (26) made of electrically insulating material (21) is formed on the connecting part (1) radially surrounding the line section (15), characterized in that - the peripheral wall (26) has an inner diameter (d) which is 12.5 mm or smaller, - that the line section (15) is designed like a sleeve, - that the line section (15) has a contact surface (19) for cooperation with a screw head (40) of a screw (39) forming the connecting means (3) in the connected state and - that the connecting part (1) forms an end region (5) of a cable (6). Connecting part according to Claim 10 , characterized in that the sleeve (17) has a free end face (20). Connecting part according to one of the Claims 10 or 11 , characterized in that the insulating material (21) surrounding the sleeve (17) below the end face (20) merges radially outwards into a surrounding surface (25) which extends approximately at right angles to the central axis (x) of the sleeve (17). Connecting part according to one of the Claims 10 until 12 , characterized in that the surrounding surface (25) is directly delimited by the peripheral wall (26). Connecting part according to one of the Claims 10 until 13 , characterized in that the electrically insulating material (21) is a thermoplastic elastomer. Connecting part (2) of an electrical connection, wherein the connecting part (2) has a line part (9) for conducting electrical current, wherein the line part (9) further has an outwardly exposed line section (10) which, in a connected state, is in electrically conductive contact with a line part (4) of a further connecting part (1), wherein the line part (9) has an opening (46) in the line section (10) for receiving a connecting means (3) for securing the connecting part (2) to the further connecting part (1) in the connected state, wherein a peripheral wall (34) made of electrically insulating material (21) is formed on the connecting part (2) radially surrounding the line section (10), characterized in that - the peripheral wall (34) has an inner diameter (d') which is 12.5 mm or smaller, - the line section (10) is designed like a sleeve, - the sleeve (31) has a counter thread (32) for screwing a screw (39) forming the connecting means (3) and - that the connecting part (2) is designed as an independently handleable component (7), with one or more fastening recesses (11). Connecting part according to Claim 15 , characterized in that the sleeve (31) has a free end face (33). Connecting part according to one of the Claims 15 or 16 , characterized in that the insulating material (21) provided surrounding the sleeve (31) initially rests against the sleeve (31) and then extends beyond the end face (33) of the sleeve (31). Connecting part according to one of the Claims 15 until 17 , characterized in that the electrically insulating material (21) is a thermoplastic elastomer. Connecting part (1) of an electrical connection, wherein the connecting part (1) has a line part (4) for conducting electrical current, wherein the line part (4) further has an outwardly exposed region (B) forming a contact surface (19) which, in a connected state, can be brought into electrically conductive contact with a line part (9) of a further connecting part (2), wherein the line part (4) has an opening (16) with a central axis (x) in the region (B) for receiving a connecting means (3) for securing the connecting part (1) to the further connecting part (2) in the connected state, wherein the connecting part (1) further has a surround (47) made of electrically insulating material (21) surrounding the opening (16), characterized in that the surround (47) has a locking formation (48) for locking connection to a connecting means (3). Connecting part according to Claim 19 , characterized in that the enclosure (47) forms a sealing bead (23) and that the locking formation (48) is formed with respect to the central axis (x) at a radial distance (e) from the sealing bead (23). Connecting part according to one of the Claims 19 or 20 , characterized in that the locking formation (48) of the sealing bead (23) is formed axially spaced from the sealing bead (23) in the direction of an elevation of the sealing bead (23). Combination of a connecting part (1) according to the characteristics of one of the Claims 19 until 21 and a connecting means (3), characterized in that the connecting means (3) has a counter-locking formation (49). Combination according to Claim 22 , characterized in that the counter-locking formation (49) is designed as a bead portion (50) projecting radially outward. Combination according to one of the Claims 22 or 23 , characterized in that the counter-locking formation (49) is made of an electrically insulating material (21'). Combination according to one of the Claims 22 until 24 , characterized in that the connecting means (3) is a screw nut (51) with a screw shaft receptacle (53) having a counter thread (52). Combination according to one of the Claims 22 until 25 , characterized in that the connecting means (3) is a screw (39) with a screw head (40) and a screw shaft (41) provided with a thread (42). Electrical connection, connecting part or combination, characterized by one or more of the characterizing features of any of the preceding claims.

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