Electric machine with an improved electrical connection between stator windings and an inverter

Abstract

Disclosed is an electric machine (1, 1a, 1b) having a machine housing (2) with at least two housing parts (3, 5, 14) that are joined together by carrying out a relative movement in an assembly direction (B). The machine (1) furthermore comprises a stator (6, 6a) that is arranged in a first housing part (3) and that has a stator laminated core (7, 7a) and multiple stator windings (8, 8a). The electric machine (1, 1a, 1b) additionally comprises an inverter (13) and a plug connection (17) that is arranged between the stator windings (8, 8a) and the inverter (13) and that electrically connects the stator windings (8, 8a) and the inverter (13). A plugging direction (C) of the plug connection (17) corresponds to the assembly direction (B), and the plug connection (17) is plugged together by joining together the first housing part (3) and the second housing part (5, 14) in the assembly direction (B). Also disclosed are a vehicle (25) having such an electric machine (1) and a method for making an electrical connection between the stator windings (8, 8a) and the inverter (13) of an electric machine (1, 1a, 1b) of this type.

Description

[0001] Electric machine with improved electrical connection between stator windings and an inverter

[0002] TECHNICAL AREA

[0003] The invention relates to an electric machine comprising a multi-part machine housing with at least a first housing part and a second housing part, which can be joined together by performing a relative movement in an assembly direction. The electric machine further comprises a stator arranged in the first housing part, which has a stator lamination stack with several axially stacked stator laminations and several stator windings arranged in the stator lamination stack. Finally, the electric machine comprises an inverter and a plug connector arranged between the stator windings and the inverter, which electrically connects the stator windings and the inverter.Furthermore, the invention relates to a vehicle with such an electric machine and to a method for establishing an electrical connection between the stator windings and the inverter of an electric machine of the type mentioned.

[0004] STATE OF THE ART

[0005] Such an electric machine, such a vehicle, and such a method are fundamentally known from the prior art. The problem is that the known solutions require numerous work steps to establish a connection between the stator windings and the inverter of an electric machine and subsequently to join the two housing parts of the electric machine. This makes both the manufacturing and any maintenance of the electric machine technically complex and therefore expensive, as well as prone to failure. DISCLOSURE OF INVENTION

[0006] One object of the invention is therefore to provide an improved electric machine, an improved vehicle, and an improved method for establishing an electrical connection between the stator windings and the inverter of an electric machine. In particular, the number of steps required to establish the aforementioned electrical connection and to assemble the housing parts is to be reduced.

[0007] The object of the invention is solved with an electrical machine of the type mentioned at the outset, in which a plugging direction of the plug connection (in which the plug connection is plugged in or unplugged) corresponds to the assembly direction and plugging in the plug connection is effected by joining the first housing part and the second housing part in the assembly direction.

[0008] Furthermore, the problem of the invention is solved with a vehicle equipped with such an electric machine which is intended to drive the vehicle.

[0009] Finally, the object of the invention is solved by a method for producing an electrical connection between the stator windings and the inverter of an electrical machine of the type mentioned above, in which the relative movement between the first housing part and the second housing part causes the plug connection to be inserted.

[0010] The proposed measures significantly simplify both the manufacturing of an electric machine and any subsequent maintenance. This reduces costs and the risk of errors or malfunctions. The proposed measures are particularly advantageous when the plug connection between the inverter and the stator windings is no longer accessible after the two housing parts are joined, or when the machine housing is completely sealed by performing the aforementioned relative movement, as this renders the interior of the electric machine inaccessible.

[0011] For example, the inverter can be permanently mounted to the second housing part, or the inverter housing itself can form the second housing part. This allows for a match between the plug-in direction and the mounting direction using simple technical measures.

[0012] For example, the second housing part can be designed as a bearing shield and accommodate a bearing for a rotor shaft of the electric machine. Thus, joining the bearing shield with the first housing part, which can be designed as a stator housing, for example, simultaneously establishes the aforementioned electrical connection.

[0013] Furthermore, the second housing part can be open, especially in the direction of the first housing part.

[0014] It should be noted here that the existence of a first and second housing part does not preclude the presence of further housing parts; the housing may also have three or more parts.

[0015] The plug connection is advantageously designed to be detachable, so that not only is the electrical connection between the inverter and the stator windings established by joining the first and second housing parts, but the plug connection, and thus the electrical connection, is also detachable when the first and second housing parts are separated again. This detachment of the plug connection is non-destructive. As a result, the electric machine can be maintained particularly easily.

[0016] However, it is also conceivable that the plug connection cannot be detached without damage, for example if separating the first housing part from the second housing part after commissioning the electrical machine is not intended or necessary.

[0017] Further advantageous embodiments and developments of the invention will become apparent from the dependent claims and from the description in conjunction with the figures.

[0018] It is advantageous if the connector comprises a socket and a plug with a contact tongue. In particular, it can be provided that in case a) the plug or in case b) the socket is permanently mounted on or in the second housing part. Accordingly, in case a), the socket can be connected to the stator windings, and in case b), the plug can be connected to the stator windings. The plug can generally have one or more contact tongues. In particular, the plug can have three contact tongues, with each contact tongue being assigned to one of the motor phases.

[0019] It is advantageous if the contact tongue is elastically bent, or in other words, if the contact tongue is subjected to elastic bending stress when the connector is assembled. This allows for good compensation of any tolerance-related misalignment between the socket and the plug. This means that the connection can be reliably established even if the socket and plug are not perfectly aligned in the assembly direction when the first and second housing parts are joined. In this context, it is also advantageous if the socket is chamfered on its opening side and / or if the free end of the contact tongue is chamfered to facilitate insertion of the contact tongue or plug into the socket.

[0020] It is particularly advantageous if the contact tongue is elastically deformable by at least 3% in the insertion direction and / or by at least 5% perpendicular to the insertion direction, in each case based on the length that the contact tongue projects or extends beyond the second housing part or a fastening element for the contact tongue in the insertion direction when unloaded. In other words, it is particularly advantageous if the elasticity of the contact tongue allows for an elastic deformation of at least 3% in the insertion direction and / or an elastic deformation of at least 5% perpendicular to the insertion direction, in each case based on the length that the contact tongue projects beyond the second housing part or a fastening element for the contact tongue when unloaded. This allows for good compensation of the tolerances that occur during the construction of an electrical machine.

[0021] It is particularly advantageous if the contact tongue has several changes of direction. This means that the contact tongue is bent in different directions (e.g., to the right and to the left) when unloaded. For example, the contact tongue can have a lateral bulge in a U-shape, rectangle, or triangle. It is also conceivable that the contact tongue has bulges on multiple sides, again for example, in a U-shape or S-shape, in a rectangle, or in a triangle. More complex contact tongue designs are also possible. The aforementioned changes of direction and the resulting shapes allow for particularly good compensation of tolerance-related misalignment between the socket and the plug.

[0022] Furthermore, it is advantageous if the socket (in the assembled state)

[0023] The connector's condition is elastically deformed. This ensures particularly good electrical contact between the contact tongue and the socket.

[0024] In general, the contact tongue can be permanently mounted on or in the second housing part. It is particularly advantageous if, in case a), the contact tongue passes through the second housing part and a seal is arranged between the contact tongue and the second housing part. This seals the interior of the electrical machine from the interior of the inverter. A separate fastening element can be provided to secure the contact tongue; this element can be positioned in front of the seal and thus prevent or at least limit movement of the contact tongue. If the socket is connected to the inverter instead of the plug, the socket can be permanently mounted in or on the second housing part, pass through the second housing part, and / or a seal is arranged between the socket and the second housing part.Furthermore, in this case a separate fastening element may also be provided that is positioned in front of the seal.

[0025] It is also advantageous if, in case a), the plug or, in case b), the socket is directly electrically connected to a power module of the inverter (and thus to an electrical circuit of the inverter). Separate wiring between the plug and the power module or between the socket and the power module is then unnecessary.

[0026] In general, the relative movement in the assembly direction can be a translational movement, a rotational movement, or a combined movement.

[0027] The first and second housing parts can thus be joined in a straight line, by performing a rotary motion, or by performing a combined motion. An example of a combined motion is a screwing motion. For instance, an inverter housing could be screwed onto the first housing part, resulting in a movement component in a straight assembly direction.

[0028] It is also advantageous if the ends of individual sections of the stator winding are electrically connected by a connector that runs in a ring or arc around a stator axis, and in case a) the socket or in case b) the plug is electrically connected to the connector and permanently mounted on the connector. For example, the stator winding can be constructed with "U-pins" in this case, the free ends of which are electrically connected to the connector.

[0029] BRIEF DESCRIPTION OF THE FIGURES

[0030] Exemplary embodiments of the invention are shown in the accompanying schematic figures. These show:

[0031] Fig. 1 shows a first exemplary and schematically depicted electrical machine in half-section;

[0032] Fig. 2 shows a second exemplary electric machine with alternative

[0033] Mounting the inverter;

[0034] Fig. 3 shows an exemplary contact tongue in detail.

[0035] Side view;

[0036] Fig. 4 shows a detailed embodiment of an exemplary

[0037] Stators in oblique view; Figs. 5 to 16 different embodiments of contact tongues in schematic representation and

[0038] Fig. 17 shows an exemplary vehicle with an electric machine of the proposed type.

[0039] DETAILED DESCRIPTION OF THE INVENTION

[0040] It is stated in the introduction that identical parts in the different embodiments are provided with the same reference numerals or component designations, possibly with different indices. The disclosure of a component contained in the description can be applied analogously to another component with the same reference numeral or component designation. Furthermore, the positional indications chosen in the description, such as "top," "bottom," "back," "front," "side," and so on, refer to the figure directly described and illustrated and, in the event of a change in position, must be applied analogously to the new position.

[0041] Fig. 1 shows a half-section through a schematically represented electric machine 1a with a multi-part machine housing 2, comprising a stator housing 3, a front end shield 4, and a rear end shield 5. The electric machine 1a also has a stator 6, which includes a stator lamination stack 7 (not shown in detail) and stator windings 8 arranged within the stator lamination stack 7. Furthermore, the electric machine 1a comprises a rotor shaft 9 with a rotor 10 mounted on it, which has a rotor lamination stack 11 (not shown in detail) and rotor magnets or rotor windings (not shown) arranged therein. The rotor shaft 9 is rotatably mounted about a rotor axis or stator axis A relative to the stator 6 by means of (rolling) bearings 12a, 12b. Specifically, the first bearing 12a is located in the front end shield 4, and the second bearing 12b is located in the rear end shield 5.Furthermore, the electric machine 1a comprises an inverter 13 with an inverter housing 14 and a printed circuit board 15 arranged therein, with an electronic circuit 16 located on it. The inverter 13 serves to control or supply power to the stator windings 8. The function of an inverter 13, particularly in connection with an electric machine 1a, is known per se and is therefore not explained in detail.

[0042] The electric machine 1a also includes a plug connection 17 arranged between the stator windings 8 and the inverter 13, which electrically connects the stator windings 8 and the inverter 13. This means that the inverter 13 can be electrically connected to the stator windings 8 by plugging in the plug connection 17 and electrically disconnected from the stator windings 8 by disconnecting the plug connection 17.

[0043] In general, the stator housing 3 can be considered the first housing part and the inverter housing 14 the second housing part, which are joined together by performing a relative movement in a mounting direction B. The stator 6 is thus arranged in the first housing part 3, and the inverter 13 is fixedly mounted to the first housing part 3 in this example. It should also be noted that the inverter housing 14 is part of the machine housing 2 and is therefore enclosed by it. A plug-in direction C of the connector 17 corresponds to the mounting direction B, and the plug-in connection 17 is brought about by a relative movement between the first housing part 3 and the second housing part 5 in the mounting direction B, or by the first housing part 3 and the second housing part 5 being joined together in the mounting direction B (automatically).

[0044] It should be noted that the machine housing 2 can also have a different design and may comprise more or fewer parts than shown in Fig. 1. For example, the stator housing 3 (first housing part) could be cup-shaped and the front bearing shield 4 could be omitted. Accordingly, the first housing part 3 and the second housing part 5 can also have different shapes.

[0045] The connector 17 can, in particular, comprise a socket 18 and a plug 19 with a contact tongue, as is the case in the example shown in Fig. 1. The plug 19 is fixedly mounted on or in the second housing part 14 (i.e., in the inverter housing), and the socket 18 is connected to the stator windings 8 (case a). However, the reverse case b) is also conceivable, namely that the socket 18 is fixedly mounted on or in the second housing part 14 (i.e., in the inverter housing) and the plug 19 is connected to the stator windings 8. The plug 19 can have one or more contact tongues. In particular, the plug 19 can have three contact tongues, with each contact tongue being assigned to one of the motor phases.

[0046] Fig. 2 shows an embodiment of an electric machine 1b, which is very similar to the electric machine 1a shown in Fig. 1. The difference is that the inverter 14 is not mounted on the stator housing 3, but on the rear end shield 5. In a first case, shown in Fig. 2, the stator housing 3 again forms the first housing part. The second housing part, however, is formed by the rear end shield 5. It would also be conceivable that the first housing part is formed by the rear end shield 5 and the second housing by the inverter housing 14. The insertion direction C of the connector 17 corresponds in both cases to the mounting direction B, but here it is aligned parallel to the rotor axis A.The connection of the plug 17 is achieved by joining the first housing part 3 and the second housing part 5 in the assembly direction B, i.e., by joining the stator housing 3 and the rear bearing shield 5, or by joining the rear bearing shield 5 and the inverter housing 14. Fig. 3 now shows a detailed side view of a contact tongue 20, which is fixedly mounted in or on the second housing part (here in or on the inverter housing 14) and which is shaped the same or similarly to the contact tongues of the plugs 19 shown in Figs. 1 and 2.

[0047] It is advantageous if the contact tongue 20 extends through the second housing part 14 and a seal 21 is arranged between the contact tongue 20 and the second housing part 14, as shown in Fig. 3. This seals the interior of the electric machine 1a, 1b from the interior of the inverter 13. In particular, the contact tongue 20, or the connector 19, can be directly electrically connected to a power module of the inverter 13 and thus to the electrical circuit 16 arranged on the circuit board 15. A separate fastening element 22 can be provided to secure the contact tongue 20. This element is positioned in front of the seal 21 and thus prevents or at least limits movement of the contact tongue 20.

[0048] If the socket 18 is connected to the inverter side instead of the plug 19, then the socket 18 may be permanently mounted in or on the second housing part 14, the socket 18 may be directly electrically connected to a power module and thus to the electronic circuit 16 of the inverter 13, and / or the socket 18 may extend through the second housing part 14 and a seal 21 may be arranged between the socket 18 and the second housing part 14. Furthermore, a separate fastening element 22 may also be provided in this case, positioned in front of the seal 21.

[0049] As can be seen in Fig. 3, the contact tongue 20 can have several changes of direction D1 ..D4. In other words, the contact tongue 20 is curved and, in this example, has a U-shaped lateral bulge. The special shape of the contact tongue 20 allows, in particular, deformation of the contact tongue 20 in and / or transversely to the insertion direction C. In Fig. 3, this is shown by the dashed line and the reference numeral 20' for the contact tongue 20. In particular, the elasticity of the contact tongue 20 in the insertion direction C can allow an (elastic) deformation a of at least 3% and / or perpendicular to the insertion direction C an (elastic) deformation b of at least 5%, in each case based on a length c which the contact tongue 20 projects or cantilevers beyond the second housing part 14 in the insertion direction C in the unloaded state or, if present as in Fig. 3, beyond the fastening element 22 for the contact tongue 20.In other words, the contact tongue 20 can be elastically deformable by at least 3% in the insertion direction C and / or by at least 5% perpendicular to the insertion direction C. This allows for good compensation of any misalignment between socket 18 and plug 19. The length c can generally also be referred to as the "overhang length".

[0050] In this context, it is also advantageous if the socket 18 is chamfered on its opening side, as is the case in Fig. 3. Alternatively or additionally, the free end of the contact tongue 20 can also be chamfered to facilitate insertion of the contact tongue 20 or the plug 19 into the socket 18. It is also conceivable that the contact tongue 20 is subjected to bending (elastically) when connected and / or that the socket 18 is elastically deformed when connected (indicated by arrows in Fig. 3). The latter enables particularly good electrical contact between the contact tongue 20 and the socket 18.

[0051] Figure 4 shows a more detailed embodiment of a stator 6a in oblique view. The stator 6a again has a stator lamination stack 7a and stator windings 8a arranged therein. The ends 23 of individual sections of the stator winding 8a are electrically connected in this case to a connector 24, the connector 24 being ring-shaped or arc-shaped around the stator axis A of the stator 6a. For example, the stator winding 8a can be constructed with "U-pins" in this case. Several sockets 18a...18c are electrically connected in this example to the connector 24 and to the stator windings 8a of the individual motor phases, respectively, and are fixedly mounted on the connector 24. Figure 4 also shows the ends of two contact tongues 20a, 20b, which are inserted into the sockets 18a, 18b. In reality, a contact tongue 20 would also be inserted into socket 18c, but for the sake of better representation of the stator 6a, this is not shown in Fig. 4.The insertion direction C (and thus the assembly direction B) is aligned parallel to the rotor axis A in the example shown in Fig. 4, as is also the case in Fig. 2. The contact tongues 20a, 20b and the sockets 18a..18c are again (automatically) connected by joining the first housing part 3 and the second housing part 5, 14 in the assembly direction B.

[0052] Figures 5 to 16 show different embodiments of contact tongues 20i to 20xii, with the contact tongue 20i of Figure 5 corresponding to the contact tongue 20 of Figure 3 in terms of its shape. The contact tongue 20ii of Figure 6, on the other hand, has an angularly curved shape, with the lateral bulge of the contact tongue 20ii being triangular. The contact tongue 20iii of Figure 7 is similar to the contact tongue 20ii of Figure 6, but has two lateral bulges. The contact tongue 20iv of Figure 8 is also similar to the contact tongue 20ii of Figure 6, but has a rectangular bulge. The contact tongue 20v of Figure 9 is similar to the contact tongue 20i of Figure 5, but has bulges on both sides. The contact tongue 20vi of Fig. 10 is similar to the contact tongue 20ii of Fig. 6 and is also bulged on both sides. The contact tongue 20vii of Fig. 11 is similar to the contact tongue 20iv of Fig. 8 and is also bulged on both sides.The contact tongue 20viii from Fig. 12 is similar to the contact tongue 20i in Fig. 5, but has smoother transitions. The contact tongues 20i to 20viii are all shaped so that their ends lie in a line. However, this is not a mandatory requirement. It is also conceivable that the ends of the contact tongues 20ix to 20xii do not lie in a line, as is the case in Figs. 13 to 15. Specifically, Fig. 13 shows an example of a contact tongue 20ix with an S-shaped bend. The contact tongue 20x from Fig. 14 is similar to the contact tongue 20ix in Fig. 13, but is bent at an angle and runs obliquely in the middle. The contact tongue 20xi from Fig. 15 is similar to the contact tongue 20ix of Fig. 13, but bent at a right angle. The contact tongue 20xii of Fig. 16 shows a more complex shape, which can be understood as a combination of the embodiments shown in Figs. 12 and 13.It should be noted here that the embodiments of the contact tongues 20i..20xii shown in Figures 5 to 16 are purely exemplary and should not be understood as restricting them to a specific shape. Rather, different shapes for the contact tongues 20i..20xii are also conceivable.

[0053] It is further noted that the relative movement in the mounting direction B is advantageously a translational movement, but it can also be a rotational movement or a combined movement. For example, the inverter housing 14 could be screwed onto the first housing part 3, which also results in a movement component in a linear mounting direction B.

[0054] The proposed measures enable a simple and automatic electrical connection between an inverter 13 and stator windings 8, 8a to be established or created by performing a relative movement between a first housing part 3 and a second housing part 5, 14 in an assembly direction B. This is particularly advantageous if the plug connection 17 is no longer accessible after the first housing part 3 and the second housing part 5, 14 have been joined, or if the machine housing 2 is completely closed by performing the aforementioned relative movement.

[0055] It is also advantageous if the plug connection 17 is detachable, so that it can be removed after separating the first housing part 3 and the second.

[0056] Housing part 5, 14 can be easily reassembled. This makes maintenance of the electric machine 1 a, 1 b particularly easy. However, it is also conceivable that the plug connection 17 cannot be disconnected, or not without damage, for example, if separating the first housing part 3 from the second housing part 5, 14 after commissioning the electric machine 1 a, 1 b is not intended or necessary.

[0057] Figure 17 shows the electric machine 1 installed in a vehicle 25. The vehicle 25 has two axles, one of which is driven. Specifically, the electric machine 1 is connected to the half-axles 27 of the rear axle via an optional transmission 26. The driven wheels 28 are mounted on the half-axles 27. The vehicle 25 is driven at least partially or temporarily by the electric machine 1. That is, the electric machine 1 can serve as the sole drive for the vehicle 25 or, for example, be used in conjunction with an internal combustion engine (hybrid drive).

[0058] In conclusion, it is noted that the scope of protection is defined by the patent claims. However, the description and drawings are to be used to interpret the claims. The features depicted in the figures can be freely exchanged and combined. In particular, it is also noted that the devices shown may, in reality, comprise more or fewer components than depicted. In some cases, the devices shown, or their components, may also be depicted not to scale and / or enlarged and / or reduced in size.

[0059] Reference symbol list

[0060] 1, 1a, 1b electric machine

[0061] 2 machine housings

[0062] 3 Stator housings (first housing part)

[0063] 4 front bearing plate

[0064] 5 rear bearing shield (second housing part)

[0065] 6, 6a Stator

[0066] 7, 7a Stator lamination stack

[0067] 8, 8a Stator winding

[0068] 9 Rotor shaft

[0069] 10 Rotor

[0070] 11 Rotor lamination package

[0071] 12a, 12b (rolling) bearings

[0072] 13 inverters

[0073] 14 Inverter housing (second housing part)

[0074] 15 Circuit board inverter

[0075] 16 electronic circuits

[0076] 17 Plug connection

[0077] 18, 18a..18c socket

[0078] 19 plugs

[0079] 20..20xii Contact tongue

[0080] 21 Seal

[0081] 22 Fastening element

[0082] 23 End of section stator winding

[0083] 24 connectors

[0084] 25 Vehicle 26 Transmission

[0085] 27 Semi-axis

[0086] 28 Wheel a Deformation in insertion direction b Deformation perpendicular to insertion direction c Overhang length of contact tongue

[0087] A axis of rotation B mounting direction

[0088] C Plug direction

[0089] D1..D4 Change of direction

Claims

Patent claims 1. An electric machine (1, 1a, 1b) comprising a multi-part machine housing (2) with at least a first housing part (3) and a second housing part (5, 14) which are joined together by a relative movement in an assembly direction (B), a stator (6, 6a) arranged in the first housing part (3) which has a stator lamination stack (7, 7a) with several axially stacked stator laminations and several stator windings (8, 8a) arranged in the stator lamination stack (7, 7a), an inverter (13) and a plug connection (17) arranged between the stator windings (8, 8a) and the inverter (13), which electrically connects the stator windings (8, 8a) and the inverter (13), characterized in that a plug-in direction (C) of the plug connection (17) coincides with the assembly direction (B) and the plug connection (17) is joined together by joining the first housing part. (3) and the second housing part (5,14) in the assembly direction (B).

2. Electric machine (1 , 1a, 1 b) according to claim 1 , characterized in that the plug connection (17) comprises a socket (18, 18a..18c) and a plug (19) with a contact tongue (20..20xii).

3. Electric machine (1 , 1a, 1 b) according to claim 2, characterized in that in case a) the plug (19) or in case b) the socket (18, 18a..18c) is fixedly mounted on or in the second housing part (5, 14).

4. Electric machine (1 , 1a, 1 b) according to one of the preceding claims, characterized in that the inverter (13) is fixedly mounted on the second housing part (5) or an inverter housing (14) of the inverter (13) forms the second housing part.

5. Electric machine (1 , 1 a, 1 b) according to one of claims 2 to 4, characterized in that the contact tongue (20..20xii) is elastically bent.

6. Electric machine (1 , 1 a, 1 b) according to claim 5, characterized in that the contact tongue (20..20xii) is elastically deformable in the insertion direction (C) by at least 3% and / or perpendicular to the insertion direction (C) by at least 5%, in each case with respect to a length (c) which the contact tongue (20..20xii) projects beyond the second housing part (5, 14) or a fastening element (22) for the contact tongue (20..20xii) in the unloaded state in the insertion direction (C).

7. Electric machine (1 , 1 a, 1 b) according to one of claims 2 to 6, characterized in that the contact tongue (20..20xii) has several changes of direction (D1..D4).

8. Electric machine (1 , 1 a, 1 b) according to one of claims 2 to 7, characterized in that the bushing (18, 18a..18c) is elastically deformed.

9. Electric machine (1 , 1 a, 1 b) according to one of claims 3 to 8, characterized in that the contact tongue (20..20xii) in case a) is guided through the second housing part (5, 14) and a seal (21 ) is arranged between the contact tongue (20..20xii) and the second housing part (5, 14).

10. Electric machine (1 , 1 a, 1 b) according to one of claims 3 to 9, characterized in that in case a) the plug (19) or in case b) the socket (18, 18a..18c) is directly electrically connected to a power module of the inverter (13).

11. Electric machine (1 , 1a, 1 b) according to one of the preceding claims, characterized in that the relative movement in the assembly direction (B) is a translational movement, a rotary movement or a combined movement.

12. Electric machine (1 , 1a, 1 b) according to one of claims 3 to 11 , characterized in that ends (23) of individual sections of the stator winding (8, 8a) are electrically connected to a connector (24) which runs in a ring shape or arc shape around a stator axis (A) of the stator (6, 6a) and in case a) the socket (18, 18a..18c) or in case b) the plug (19) is electrically connected to the connector (24) and is fixedly mounted on the connector (24).

13. Electric machine (1 , 1a, 1 b) according to one of the preceding claims, characterized in that the second housing part (5, 14) is designed as a bearing shield and accommodates a bearing (12b) for a rotor shaft (9) of the electric machine (1 , 1 a, 1 b).

14. Vehicle (25) with an electric machine (1 , 1a, 1 b) according to one of claims 1 to 13, which is provided for driving the vehicle (25).

15. Method for establishing an electrical connection between the stator windings (8, 8a) and the inverter (13) of an electric machine (1 , 1 a, 1 b) according to any one of claims 1 to 13, wherein the relative movement between the first housing part (3) and the second housing part (5, 14) causes the plug connection (17) to be plugged together.

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