EP3465842B1 - Electrical plug-in connection that can be quickly disconnected, fixable plug-in connection, and method for establishing contact between an electrical contact element and an electrical conductor - Google Patents

Description

The invention relates to a quick-disconnect electrical plug connection for high-current vehicle applications, for example for the electrical connection of an electrical accumulator to a drive device of an industrial truck. In addition, the invention relates to a fixable and separable electrical plug connection and a method for producing the electrically conductive connection between an electrical contact element and an end region of an electrical conductor protruding from an insulation.

In order to be able to operate electrically operated industrial trucks without a quick charge function without long breaks, it is known to keep several electric accumulators (also called "batteries") charged for an industrial truck and to keep a currently used accumulator against a fully charged accumulator when a certain discharge state is reached to exchange. For this purpose, it is desirable to be able to quickly and easily decontact an accumulator located in the vehicle from a drive device of the industrial truck, if possible without tools, and to be able to contact another charged accumulator with this drive device with the least possible loss of time. The battery terminals known and widely used in the prior art are related to this Purpose of use is only suitable to a limited extent, since a clamping screw must always be actuated for decontacting or contacting in order to be able to establish or disconnect an electrical connection between the drive device and the electrical accumulator. It is also disadvantageous that these known clamping devices make it necessary to attach a turning tool, which can cause major problems, in particular if the accumulators in the industrial truck are difficult to access from the outside. In addition, the known terminal connections are regularly exposed to negative external influences, for example from moisture and dirt, as a result of which a permanently good electrical connection requires the use of additional measures, for example so-called "pole fat".

Plug connections are known in numerous different configurations. From the DE 201 17 275 U1 a plug connector is known in which a conductor wire of a cable can be inserted into a transverse bore of a socket or pin contact for a form-fitting fixation. Furthermore, from the DE 10 2013 201 125 A1 as well as the US 2013/0090009 A1 a connector for use in the vehicle sector is known, in each of which a two-part inner conductor is provided, comprising a first inner conductor part, sleeve-shaped for receiving a mating contact element, and a separate pin-shaped second inner conductor part connected to a conductor wire of a cable. As a result, however, the connector has a relatively large number of separate components, as a result of which the connector has a relatively complex structure and is relatively cost-intensive to manufacture. Furthermore, the connector is made relatively large and requires a correspondingly large assembly space. In addition, in the case of a large number of the previously known plug connections, at least some of the electrical contact elements are freely accessible from the outside, so that there may be a possible risk of injury, in particular due to an electric shock. From the JP H09 35702 A For example, a clamping device for clamping an electrical contact element to an exposed battery pole is known. A similar variant of a plug connection with an annular wall surrounded, but still exposed to the outside contact element is in each case from the DE 10 2011 015 825 A1 and EP 1 369 957 A1 famous.

The invention is based on the object of providing a quickly separable electrical plug connection which is constructed in a particularly space-saving manner and designed to be particularly safe to use.

This object is achieved by the electrical plug connection reproduced in claim 1 and by the method mentioned in claim 18 for producing such a connection.

The rapidly separable electrical plug connection according to the invention comprises a first, preferably approximately pot-shaped electrical contact element, which preferably has a base area and - particularly preferably - a jacket area. The jacket area is preferably provided with at least one slot which preferably extends from the bottom area to, particularly preferably, the edge of the jacket area opposite the bottom area. A plurality of slots are preferably provided distributed over the circumference of the jacket area. Furthermore, the electrical plug connection according to the invention comprises a cable which preferably comprises an electrical conductor and preferably an insulation sheathing this conductor. An end region of the conductor protruding from the insulation is preferably connected in an electrically conductive manner to the bottom region of the first contact element, in particular soldered or welded. Furthermore, this electrical plug connection has an insulating sleeve which surrounds the jacket area of the first electrical contact element and which comprises inner and outer jacket surfaces. The inner jacket surface of the insulating sleeve is spaced apart from the outer jacket surface of the jacket region of the electrical contact element. This measure ensures that adjacent electrical contact tongues, which are separated from one another by the slots, can be displaced outward when a second contact element abuts on the inside of the contact tongues. Furthermore, the electrical plug connection according to the invention comprises the bottom area of the first Contact element and the outer jacket surface of the insulation sleeve as well as a connection area of the cable surrounding the first housing, which is produced by overmolding with a plastic material. With the exception of an opening through which a second electrical contact element must be insertable, the result of the encapsulation is a sheathing that completely surrounds all electrically conductive parts of the first contact element and part of the insulation of the electrical conductor. Due to the radial distance between the inner jacket surface of the insulating sleeve and the outer jacket surface of the first contact element, a displacement of the individual contact tongues when inserting a contact pin is possible even after the encapsulation. According to the invention, the electrical plug connection comprises a second electrical contact element which has an outer jacket surface which can be plugged over from the first jacket region of the first electrical contact element, the second electrical contact element preferably being surrounded by a second housing which forms an annular space with the second electrical contact element into which the first housing can be inserted. The second housing with its inner lateral surface preferably encloses the outer lateral surface of the first housing in a sealing manner in the plugged-in state, for which purpose the second housing is preferably made of an elastic, particularly preferably of a rubber-elastic material. Due to the particularly good sealing effect achieved in the covered state, external, negative effects on the electrical contact between the first and second contact elements are effectively prevented even without further aids such as pole greases, etc.

The further fixable and separable electrical plug connection according to the invention also comprises a first coupling part with a first electrical contact element, which comprises a base area and a jacket area, the jacket area having at least one slot extending from the base area to an edge area of the jacket area opposite the base area, with an electrical cable which comprises an electrical conductor and an insulation sheathing this conductor, wherein an end region of the conductor protruding from the insulation is electrically conductively connected to the bottom region of the first contact element is, with an insulating sleeve surrounding the jacket region of the first electrical contact element, which has an outer jacket surface and an inner jacket surface, the inner jacket surface being spaced from an outer jacket surface of the jacket region of the electrical contact element, and with one the bottom region of the first contact element and the outer one The outer surface of the insulating sleeve and a connection area of the electrical cable surrounding the first housing. A second coupling part that is provided, in particular a counter-coupling part, in turn comprises a second electrical contact element, which has an outer jacket surface that can be plugged over by the jacket region of the first electrical contact element, and the second electrical contact element is surrounded by a second housing, which is surrounded by the second electrical contact element Contact element forms an annular space into which the first housing can be inserted. In this respect, the fixable and separable electrical plug connection corresponds to the previously explained quick-release plug connection. To secure the plug connection has t he fixable and separable electrical connector, a securing bracket for fixing on the first housing to the second housing. In this way, particularly when the plug connection is used in vehicles in which shocks, vibrations and / or acceleration forces regularly occur during operation, a permanently firm and particularly secure hold of one coupling part on the other coupling part can be guaranteed. In addition, the safety bar can be used to quickly and easily determine whether the first coupling part is still completely and securely plugged into the second coupling part, or whether the plug connection has at least partially loosened, for example after a certain period of use of the vehicle. The securing clip is preferably designed separately and can for example have a shape that at least partially encompasses the two housings.

The securing bracket is preferably mounted pivotably about an axis of rotation. As a result, the securing bracket can grip around the two housings in a particularly simple manner and fix them to one another. Furthermore, the securing clip is not designed loosely and cannot be lost if the electrical connection is loosened. The is particularly preferred The securing clip is mounted on the second housing and can be temporarily fixed on the first housing, for example by means of a latching lug engaging in a recess. The axis of rotation is preferably arranged perpendicular to a plug-in direction in which the plug connection takes place. The securing bracket is particularly preferably arranged laterally next to a peripheral wall of the second housing. As a result, the second coupling part and thus the entire plug connection can be constructed in a particularly space-saving manner.

The securing bracket preferably has a first bracket section and a second bracket section which is unwound with respect to the first bracket section. As a result, the safety bracket can be folded around the two housings in a particularly simple manner. In particular, one of the bracket sections can serve as a handle on which an operator can grip and move, in particular rotate, the safety bracket. Particularly preferably, the first bracket section is designed to correspond to the outer contour of the second housing and the second bracket section is designed to correspond to the outer contour of the first housing. Each bracket section can have one or more bracket arms

The first housing is preferably designed in several parts. For example, the first housing has an upper part facing the cable connection area and a lower part facing away from the cable connection area. These housing parts can each be produced as a cast part. As a result, the housing can be manufactured in a particularly simple and cost-effective manner. In an alternative, likewise advantageous embodiment, the plug connection comprises a first housing surrounding the bottom area of the first contact element and the outer jacket surface of the insulating sleeve as well as a connection area of the cable, which is formed in one piece and is produced by overmolding with a plastic material.

The first housing preferably has a protective edge section on an outer side, which is arranged at a radial distance from an outer jacket surface of the first housing and at least partially radially surrounds the jacket surface. It should be clear that this refinement applies to both the Overmoulding produced first housing as well as a multi-part first housing can be provided. In the coupled state, the protective edge section can at least partially surround the second housing radially on the outside, in particular on a circumferential side. In this way, for example, improved protection against accidental contact and an improved tightness of the plug connection can be achieved.

Particularly preferably, a free space is formed between the outer jacket surface and the protective edge section, into which the second housing can be inserted at least with a free end region. As a result, the first housing can surround the second housing in this area, as a result of which a type of dome is formed around the second housing and consequently the plug connection is particularly well protected against splash water, for example.

The first housing and the second housing preferably each have at least one mutually corresponding guide element for aligning the two housings with one another when connecting the two coupling parts. As a result, the plug connection can be made in a particularly simple manner and particularly quickly. Furthermore, the guide elements can be used to prevent the two coupling parts from rotating relative to one another. In particular, the guide elements can be designed in such a way that the first coupling part can be coupled to the second coupling part in only a single specific orientation. In this way, for example, misalignments of the two coupling parts, in particular the electrical contacts, can be avoided.

The first housing and the second housing preferably each have at least one mutually corresponding fixing means for at least temporarily fixing the two housings to one another. As a result, the two coupling parts can be connected in a particularly secure manner. For example, after being plugged into the second coupling part, the first coupling part is temporarily fixed on this second coupling part so that one of the coupling parts cannot fall out or loosen and is only made possible by a special handle or force. This is for the Operator allows improved handling, for example, to move the safety bracket into a different fixing position.

The fixing means preferably has a latching lug or clip formed on one of the housings and a recess arranged on the other housing and corresponding to the latching lug. Particularly preferably, a housing section designed in the plug-in direction, preferably designed as a guide element, with latching lug protruding thereon, preferably radially inward of the first coupling part, for engaging in a corresponding recess formed on the second housing is provided. As a result, the temporary fixing means can be designed to be particularly inexpensive to manufacture and particularly simple to operate.

The end region of the conductor is preferably soldered or welded to the base region of the first contact element. As a result, a particularly long-lasting and secure connection between the first contact element and the conductor wire of the cable can be ensured.

In order to be able to bring about permanent contact between the jacket area of the first electrical contact element with, for example, a contact pin even after frequent plugging-in operations, a spring ring is preferably provided — particularly preferably surrounding a part of the length of the jacket area. This can consist of a spring steel. So that this does not limit a spreading movement of the contact tongues separated from one another by the slots by a stop on the inner surface of the insulation sleeve, a groove is preferably provided in the jacket area, into which the spring ring engages so far that it does not go beyond the surface of the jacket area of the outside survives first electrical contact element. This measure also eliminates the risk of the spring ring slipping or slipping in the slip-on direction.

A housing that is used in connection with a quickly disconnectable electrical plug connection, in particular for one which has one or more of the features cited above, preferably comprises an edge running in the plug-in direction, which merges into the outer jacket surface of the housing via a chamfer or in a curved manner. Surprisingly, it has been shown that a housing designed in this way is suitable for the tight cooperation of a mating housing that surrounds the outer jacket surface in the plugged-in state if this is made of an elastic, in particular rubber-elastic material.

Due to the annular space between the second housing and the second electrical contact element, into which the first housing must be insertable when plugging over, the second housing regularly has an opening that enables an operator to come into contact with the second contact element with a finger . In a further preferred embodiment, a contact protection made of an insulating material is therefore provided on the end of the second contact element leading in the plug-in direction.

In order to avoid reverse polarity plugging, the outer jacket surface of the first housing and the annular space of the second housing are preferably designed to be pole-specific, in particular provided with grooves and / or projections.

The invention also relates to a method for producing the electrically conductive connection between the bottom region of the first electrical contact element, which has an inner surface and an outer surface, and the end regions of the electrical conductor of an electrical plug connection protruding from the insulation, as described above. In this method, the end area of the electrical conductor is brought into contact with the outer surface of the bottom of the first electrical contact element by means of a first contacting tool, and a second contacting tool is introduced into the jacket area instead of the second contact element until the contacting tool rests on the inner surface of the bottom area. Thereafter, the first and / or second contacting tool with a permanent connection between the first electrical contact element and applied to the conductor causing energy. This energy can be, for example, mechanical energy that causes pressure between the floor and the conductor, if the floor and / or conductor should be designed in such a way that they can be permanently pressed together. It is also possible, for example, to set the floor and / or the ladder in mechanical vibrations in order to bring about a friction weld between the floor and the ladder. For this purpose, the first and / or second contacting tools can be designed as parts of sonotrodes. It is also possible, for example, to design the first and second contacting tools as electrodes and to produce a welded connection by applying electrical power.

Regardless of the type of energy introduced to establish the permanent connection, it is essential that the second contacting tool acts on the inner surface of the floor area, since this prevents the jacket area with its contact tongues from being damaged by any possible energy input.

Fig. 1

- schematisch - ein erstes Ausführungsbeispiel einer erfindungsgemäßen, schnell trennbaren elektrischen Steckverbindung in einem Schnitt, wobei der linke Bereich vor dem Überstecken, der rechte Bereich nach dem Überstecken des ersten elektrischen Kontaktelements mit dem zweiten elektrischen Kontaktelement dargestellt sind;

Fig. 2

- schematisch - die Vorbereitung des dauerhaften Verbindens des ersten elektrischen Kontaktelements mit dem elektrischen Leiter gemäß erstem Ausführungsbeispiel;

Fig. 3

- wiederum schematisch - den Verfahrensschritt des dauerhaften Inverbindungbringens des ersten elektrischen Kontaktelements mit dem elektrischen Leiter gemäß erstem Ausführungsbeispiel; und

Fig.4

- schematisch - ein zweites Ausführungsbeispiel einer erfindungsgemäßen Steckverbindung in einer perspektivischen Explosionsdarstellung.

The invention will now be further clarified with the aid of the drawing. Show it:

Fig. 1

- schematically - a first embodiment of a rapidly separable electrical plug connection according to the invention in a section, the left area being shown before the plugging, the right area after the plugging of the first electrical contact element with the second electrical contact element;

Fig. 2

- schematically - the preparation of the permanent connection of the first electrical contact element to the electrical conductor according to the first embodiment;

Fig. 3

- again schematically - the process step of permanently bringing the first electrical contact element into connection with the electrical conductor according to the first embodiment; and

Fig. 4

- schematically - a second embodiment of a plug connection according to the invention in a perspective exploded view.

That in the Figure 1 The illustrated embodiment, designated as a whole by 100, of the quickly separable electrical plug connection is provided in particular for connecting a pole of an electrical accumulator to an electrical connection of a drive device of an industrial truck. In Fig. 1 Let the left side be on the battery side A, the right side on the drive side B. On the battery side A, the electrical plug connection 100 is shown before the plugging-on process, on the drive side after the plugging-on process. The plug connection is identical on the accumulator and drive side, so that the following explanations apply to both sides.

The electrical plug connection 100 comprises a first electrical contact element 1, which is assigned to a first coupling part (not identified in more detail), is approximately pot-shaped and comprises a jacket area 2 with an inner jacket surface 2 'and an outer jacket surface 2 ", as well as a base area 3. The electrical Contact element 1 is made of a material with good electrical conductivity, for example a copper alloy The jacket area 2 has a plurality of slots 5 extending from the bottom area 3 to the edge area 4, of which in FIG Fig. 1 only three are recognizable. Adjacent slots 5 each delimit a contact tongue 6. The contact tongues 6 delimit the inner jacket surface 2 'of the jacket region 2, the diameter of which is adapted to the outside diameter of a second electrical contact element 7 in such a way that the first electrical contact element 1, with the contact tongues 6 resting against a outer jacket surface 7 'of the second electrical contact element 7 can be plugged over.

So that the contact tongues 6 of the first electrical contact element 1 rest on the second electrical contact element 7 even after multiple plugging-in processes with a pretension necessary for contacting, a spring ring 8 is provided which surrounds the outer jacket surface 2 ″ of the jacket region 2. The spring ring 8 rests in an annular groove 26 so that it cannot slip off the contact tongues 6 in the plugging direction S and not over the outer jacket surface 2 ″ of the jacket region 2 stands out.

The jacket area 2 of the first electrical contact element 1 is surrounded by an insulating sleeve 9. Its inner jacket surface 9 'has a radial distance r to the outer jacket surface 2 "of the jacket region 2. An annular space (27) is thus formed between the inner jacket surface 9' and the outer jacket surface 2" so that the contact tongues 6 are spread apart during Plugging over with a second electrical contact element is possible within the limits specified by the distance r. The insulation sleeve 9 can therefore be formed from a rigid material and prefabricated.

The first electrical contact element 1 is electrically connected to an electrical cable 10, which has insulation 11 and an electrical conductor 12. For this purpose, the conductor 12 is exposed from the insulation 11 in an end region E of the cable 10. The length of the end region E corresponds approximately to the outer diameter of the first electrical contact element 1. The end region E is laid flat on the outside of the base region 3 and is inseparably connected to it by a force fit or form fit or by means of soldering or welding. In this context, “flat” means that the electrical conductor 12 in the connection area is oriented approximately perpendicular to the plugging direction S, in which the first electrical contact element and the second electrical contact element can be plugged over.

The insulation sleeve 9, the base area 3 with the electrical conductor 1 attached to it and an adjoining area T of the insulation S are surrounded by a housing 13 which is produced by insert molding. It surrounds the aforementioned components or areas in an inseparable and gas-tight manner, with the exception of an opening 14 which extends into the first electrical contact element and through which the second electrical contact element 7 can be inserted. The diameter of the opening 14 is only slightly larger than the diameter of the inner jacket surface 2 ′ of the first contact element 1.

On the side facing away from the electrical cable 10, beyond the plug-in axis S, the housing 13 comprises a projection 29 which protrudes from a flat surface 15. It is used to prevent any fixing means (not shown in the drawing) from slipping off, with which the first and second electrical contact elements 1, 7 can be fixed in the plugged-in state.

The second electrical contact element 7, which is assigned to a second coupling part (not designated in more detail), is designed as a plug contact of approximately cylindrical cross section in the exemplary embodiment shown in the drawing. It is surrounded by an approximately pot-shaped housing 16 made of an elastically flexible material. The diameter of the pot-shaped housing 16 is adapted to the outer diameter of the area of the first housing 13 surrounding the jacket area 2 of the first electrical contact element, which area has a jacket surface 17 here, so that this area can be inserted into the second housing 16 with a slight widening of the latter. In order to facilitate the insertion process, the outer jacket surface 17 of the first housing 13 merges in a curved manner into the edge 18 of the first housing 13 leading in the plug-in direction S. The second housing 16 forms an annular space 28 with the outer jacket surface 7 ′ of the second electrical contact element.

The second electrical contact element 7 has a contact protection 19 made of an insulating material at its end leading in the plug-in direction S. The contact protection 19 is pressed with the second electrical contact element 7, for which purpose it has an extension which engages in a force-locking manner in a corresponding bore of the contact protection 19.

The end region 20 of the second electrical contact element 7 pointing away from the touch guard 19 is provided with an external thread 21. This is provided for screwing the second electrical contact element 7 to a battery pole or to an electrical connection of a drive unit.

The end area 20 is radially surrounded by housing areas 22.

The first housing can be provided with grooves and / or projections and the second housing with complementary projections and / or grooves. Their arrangement and / or design can be pole-specific, so that confusion of plus and minus poles and reverse polarity is prevented.

With reference to the Figs. 2 and 3 The method is now to be described with which the end region E of the conductor 12 of the cable 10 is electrically connected to the bottom region 3 of the first electrical contact element 1.

As in Fig. 2 is shown, the electrical conductor 12 is first placed in the area E on the outer surface of the bottom area 3. A first contacting tool 23 and a second contacting tool 24 are provided. The first contacting tool 23 is suitable for pressing the electrical conductor 12 against the outer surface of the floor area 3. The second contacting tool 24 is designed in such a way that it can be inserted in the plugging direction S into the space enclosed by the contact tongues 6. The leading end 25 in the plug-in direction is designed to be complementary to the contour of the inside of the base area, so that it can be brought into abutment over the area. If the first contacting tool 23 is in contact with the electrical conductor 12 and the second contacting tool 24 is in contact with the inside of the bottom area 3, at least one of the contacting tools 23, 24 is energized in such a way that the electrical conductor 12 contacts the bottom area the outside of which enters into a non-destructive no longer separable, therefore also referred to as inseparable connection. The application of electrical energy to generate electrical welding or the application of vibrational energy, for example, in that one or both of the contacting tools are designed as parts of sonotrodes and friction welding is effected, is mentioned here merely as an example. After removing the contacting tools 23, 24 the placement of the insulation sleeve 9 and the subsequent overmolding to form the housing 13 takes place in a manner known per se.

That in the Figure 4 The second exemplary embodiment of a plug connection 100 according to the invention shown also comprises two coupling parts 101, 102, which essentially, that is to say in particular the components arranged in the interior of the housing 13 and 16 and relating to the electrical components, the components in Figures 1 to 3 correspond configurations shown. In the external configuration of the coupling parts 101, 102, however, there are numerous distinguishing features.

In the Figure 4 The plug connection 100 shown has a first coupling part 101 which - like the first exemplary embodiment - a first electrical contact element 1, comprising a base area 3, a casing area 2 forming and separated by slots 5 contact tongues 6 with a free end or edge 4 3, the first electrical contact element 1 is connected to a conductor 12 of a cable 10, for example by soldering. The first contact element 1 is surrounded radially at least in the jacket region 2 by an insulating sleeve 9 and a first housing 13. In this example, the housing 13 is designed in two parts and has a first housing part 13a and a second housing part 13b. The second housing part 13b surrounds at least the connection point between the first contact element 1 and the conductor wire 12. The first housing part 13a surrounds the insulating sleeve 9 and the first contact element 1 located therein. The inside of the first housing part 13a is essentially like that in FIG Figure 1 first housing 13 shown constructed. On an outside of the first housing part 13a, in the second embodiment shown here, there are additionally, for example, three connection points for fastening the second housing part 13b, for example screw holes, a protective edge section 30 which surrounds an outer jacket surface 17 of the first housing part 13a at a radial distance, and a protective edge section 30 subsequent first guide element 31 for aligning the first housing 13 with respect to the second housing 16 when coupling the two coupling parts 101, 102. In an alternative, in Figure 4 Not shown embodiment, the first housing 13 is formed in one piece and in one piece, in particular as a housing surrounding the bottom area 3 of the first contact element 1 and the outer jacket surface 9 ″ of the insulating sleeve 9 as well as a connection area of the cable 10, and preferably made by overmolding with a plastic material educated.

The protective edge section 30 forms a free space 41 into which the second housing 16 can be inserted at least with a free end area 42 when the two coupling parts 101, 102 are coupled. On the guide element 31, on a side face facing the first contact element 1, an in Figure 4 Not shown, protruding locking lug 32 is formed, which can be brought into engagement for a temporary fixation of the first coupling part 101 on the second coupling part 102 in a recess 33 formed on the second coupling part 102. A sealing ring 40 can advantageously be arranged on the end region 42 of the second housing 16, which is arranged for coupling the first coupling part 101 to the second coupling part 102 in such a way that the plug connection 100 is sealed off from the environment.

The second coupling part 102 comprises - like the first exemplary embodiment as well - a second electrical contact element 7, which has an outer jacket surface 7 ′ that can be pushed over from the jacket region 2 of the first electrical contact element 1, the second electrical contact element 7 from the second housing 16 is surrounded and forms with the second electrical contact element 7 an annular space 28 into which the first housing 13 can be inserted. On an outer side, the second housing 16 has two second guide elements 31 'and 31 ″ corresponding to the first guide element 31 of the first housing 13 Coupling part 101 guide the first guide element 31 on two end faces. In the present case, the second housing 16 has a recess 33 between these webs 31 ′, 31 ″ for receiving the latching lug arranged on the first guide element 31 for the temporary fixation of the two coupling parts 101,102 to one another. Furthermore, the second housing 16 has a receiving sleeve 34 for mounting or non-rotating fastening of a securing bracket 35.

The securing clip 35 is used to permanently fix the first housing 13 to the second housing 16 and is designed as a separate component. The securing bracket 35 is mounted pivotably or rotatably about a rotation axis 36 by means of the bolts 37 on the receiving sleeve 34 of the second housing 16. The axis of rotation 36 is arranged perpendicular and offset to the plug-in axis S. The securing bracket 35 has a first bracket section 38 and a second bracket section 39 angled relative to the first bracket section 38. The first bracket section 38 is U-shaped and has two bracket arms each extending from the bolts 37 to the second bracket section 39. In the area of the adjoining second bracket section 39, the bracket arms are brought together. The second bracket section 39 is curved so that it is particularly suitable as a handle for operating the safety bracket 35. A latching lug 43, not shown in detail, is arranged on the second bracket section 39, which can engage in a recess 44 formed on the second housing part 13b of the first housing 13 in order to fix the securing bracket 35.

Due to the design described above, a permanent connection of the contact elements 1, 7 can be ensured despite vibrations, shocks or other forces that occur. During a coupling process, the first coupling part 101 with its housing 13 is first aligned via the guide elements 31, 31 lines, 31 two lines with the securing bracket 35 open on the second housing 16 of the second coupling part 102 and along the plug axis S in the direction of the second coupling part 102 Translatorrausch advanced until the locking lug 32 arranged on the first guide element 31 engages in the recess 33. In this state, the operator can let go of the first coupling part 101 and swivel the securing clip 35 over the coupling part 101 via the second clip section 39, which is designed as a handle, until the securing clip 35 with the Latch 43 engages in recess 44 behind a shoulder. The plug connection 100 is released by slightly lifting the second bracket section 39, which is designed as a handle, to release the securing bracket 35 from the first housing 13, in particular the locking lug 43 from the recess 44, and pivoting the securing bracket 35 to the side the first coupling part 101 can be pulled out of the coupling part 102 parallel to the plug-in direction S by releasing the locking lug 32 from the recess 33.

It should be clear that the scope of protection of the invention is not limited to the exemplary embodiments described and / or the combinations of features shown. In particular, the structure of the housing and the securing bracket can be modified without changing the essence of the invention.

Reference list:

100

electrical plug connection

101

first coupling part

102

second coupling part

1

first electrical contact element

2

Mantle area

2 '

inner jacket surface

2 "

outer jacket surface

3

Floor area

4th

Edge area

5

Slots

6th

Contact tongues

7th

second electrical contact element

7 '

outer jacket surface

8th

Spring washer

9

Insulation sleeve

9 '

inner jacket surface

9 "

outer jacket surface

10

electrical cable

11

insulation

12th

ladder

13th

first housing

13a

first housing part

13b

second housing part

14th

opening

15th

surface

16

second housing

17th

outer jacket surface

17 '

Outside

18th

edge

19th

Contact protection

20th

End area

21

External thread

22nd

Housing areas

23

first contacting tool

24

second contacting tool

25th

The End

26th

Groove

27

Annulus

28

Annulus

29

head Start

30th

Protective edge section

31, 31 ', 31 "

Guide element

32

Locking lug

33

Recess

34

Receiving sleeve

35

safety catch

36

Axis of rotation

37

bolt

38

first bracket section

39

second bracket section

40

Sealing ring

41

free space

42

End area

43

Locking lug

44

Recess

A.

Accumulator side

B.

Drive side

E.

End area

r

distance

S.

Overlap axle

T

area

Claims (18)

1. Electrical plug-in connection (100) for high-current vehicle applications, comprising a first coupling part (101)

   - that has a first electrical contact element (1) comprising a base region (3) and a lateral region (2), the lateral region (2) having at least one slot (5) extending from the base region (3) to an edge region (4) of the lateral region (2) opposite the base region (3),

   - that has an electrical cable (10) which comprises an electrical conductor (12) and insulation (11) sheathing this conductor (12), an end region (E) of the conductor (12) which protrudes from the insulation (11) being electrically conductively connected to the base region (3) of the first contact element (1),
   and comprising a second coupling part (102)

   - that has a second electrical contact element (7) which has an outer lateral surface (7') over which the lateral region (2) of the first electrical contact element (1) can be plugged,

   characterized
   in that the first coupling part (101)

   - has an insulating sleeve (9) which surrounds the lateral region (2) of the first electrical contact element (1) and has an outer lateral surface (9") and an inner lateral surface (9'), the inner lateral surface (9') being spaced apart from an outer lateral surface (2") of the lateral region (2) of the electrical contact element (1), and

   - comprises a first housing (13) which surrounds the base region (3) of the first contact element (1) and the outer lateral surface (9") of the insulating sleeve (9) as well as a connection region of the electrical cable (10), and which is produced by overmolding with a plastics material, and

   - in that the second electrical contact element (7) is surrounded by a second housing (16) which, together with the second electrical contact element (7), forms an annular space (28) into which the first housing (13) can be inserted,

   or
   in that the first coupling part (101)

   - has an insulating sleeve (9) which surrounds the lateral region (2) of the first electrical contact element (1) and has an outer lateral surface (9") and an inner lateral surface (9'), the inner lateral surface (9') being spaced apart from an outer lateral surface (2") of the lateral region (2) of the electrical contact element (1), and

   - comprises a first housing (13) which surrounds the base region (3) of the first contact element (1) and the outer lateral surface (9") of the insulating sleeve (9) as well as a connection region of the electrical cable (10),

   - in that the second electrical contact element (7) is surrounded by a second housing (16) which, together with the second electrical contact element (7), forms an annular space (28) into which the first housing (13) can be inserted, and

   - in that a securing clip (35) is provided for fixing the first housing (13) to the second housing (16).
2. Plug-in connection according to claim 1, characterized in that the securing clip (35) is mounted pivotably about an axis of rotation (36).
3. Plug-in connection according to either claim 1 or claim 2, characterized in that the securing clip (35) has a first clip portion (38) and a second clip portion (39) angled relative to the first clip portion (38).
4. Plug-in connection according to any of claims 1 to 3, characterized in that the first housing (13) is in multiple parts.
5. Plug-in connection according to any of the preceding claims, characterized in that the first housing (13) has, on an outer side (17'), a protective edge portion (30) which is arranged so as to be radially spaced apart from an outer lateral surface (17) of the first housing (13) and at least partially surrounds the lateral surface (17) radially.
6. Plug-in connection according to claim 5, characterized in that, between the outer lateral surface (17) and the protective edge portion (30), a space (41) is formed, into which at least a free end region (42) of the second housing (16) can be inserted.
7. Plug-in connection according to any of the preceding claims, characterized in that the first housing (13) and the second housing (16) each have at least one mutually corresponding guide element (31, 31', 31") for aligning the two housings (13, 16) with one another.
8. Plug-in connection according to any of the preceding claims, characterized in that the first housing (13) and the second housing (16) each have at least one mutually corresponding fixing means (32, 33) for at least temporarily fixing the two housings (13, 16) to one another.
9. Plug-in connection according to claim 8, characterized in that the fixing means (32, 33) has a latching lug (32) formed on one housing (13, 16) and a recess (33), corresponding to the latching lug (32), arranged on the other housing (13, 16).
10. Plug-in connection according to any of the preceding claims, characterized in that the end region (E) of the conductor (12) is soldered or welded to the base region (3) of the first contact element (1).
11. Plug-in connection according to any of the preceding claims, characterized in that a spring ring (8) surrounding part of the length of the lateral region (2) is provided.
12. Plug-in connection according to claim 11, characterized in that a groove (26) is provided in the lateral region (2) to accommodate the spring ring (8).
13. Plug-in connection according to any of the preceding claims, characterized in that the first housing (13) comprises an outer lateral surface (17) and an edge (18) that extends perpendicularly to a plug-over direction (S) and transitions via a chamfer or in a curved manner into the outer lateral surface (17).
14. Plug-in connection according to any of the preceding claims, characterized in that the second housing (16) is made of an elastic material.
15. Plug-in connection according to any of the preceding claims, characterized in that the second contact element (7) has, at an end extending in the plug-over direction (S), a contact-protection means (19) made of an insulating material.
16. Plug-in connection according to any of the preceding claims, characterized in that the outer lateral surface (17) of the first housing (13) and the annular space (28) of the second housing (16) are designed to be pole-specific.
17. Plug-in connection according to claim 16, characterized in that the outer lateral surface (17) of the first housing (13) has grooves and/or projections and the annular space (28) of the second housing (16) has respective complementary projections and/or grooves.
18. Method for producing an electrically conductive connection between the base region (3) of the first electrical contact element (1), which base region has an inner surface and an outer surface, and the end region (E) of the electrical conductor (12) of an electrical plug-in connection according to any of claims 1 to 17, which end region protrudes from the insulation (11), characterized in that the method comprises the following steps:

    - bringing the end region (E) of the electrical conductor (12) into contact with the outer surface of the base region (3) by means of a first contacting tool (23),

    - inserting a second contacting tool (24) into the lateral region (2) and bringing the second contacting tool (24) into contact with the inner surface of the base region (3),

    - applying an energy to the first and/or the second contacting tool (23, 24) to establish a connection between the first electrical contact element (1) and the electrical conductor (12) such that the electrical conductor (12) connects to the base region (3) on an outer side of said region, the connection not being releasable without destruction.

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