Stator for electric machine, electric machine, motor vehicle, and method for producing stator

Abstract

The invention relates to a stator (ST) for an electric machine (EM) of an at least partially electrically driven motor vehicle (KFZ), comprising: an annular yoke (JO) having an inner side (IS) facing inward in the radial direction; the invention relates to a stator for a motor vehicle, comprising a yoke (JO), and stator teeth (SZ) which are connected to the yoke (JO) in a form-fitting manner and which have a tooth shank (ZS) and a tooth tip (ZK) which adjoins the tooth shank (ZS), characterized in that a radially inward connecting projection (VV) is formed on the inner side (IS) of the yoke (JO) and a connecting recess (VA) is formed on the end side (SS) of the tooth shank (ZS) which is formed on the side facing away from the tooth tip (ZK), and the connecting projection (VV) engages at least partially and / or in some sections into the connecting recess (VA) for a form-fitting connection.

Description

Technical Field

[0001] The invention relates to a stator for an electric motor, wherein the stator has a ring-shaped yoke and at least one stator tooth. The stator tooth is connected to the yoke in a form-fitting manner. It is provided that a connection projection is formed on the inner side of the ring-shaped yoke and the stator tooth has a corresponding connection receptacle. In addition, the subject matter of the invention is also an electric motor having a stator according to the invention. Another subject matter of the invention is a motor vehicle having an electric motor according to the invention. In addition, the subject matter of the invention is a method for manufacturing a stator according to the invention. Background Art

[0002] The stator of an electric motor is known in principle. It is also known that the stator can have a yoke of annular design and at least one stator tooth is connected to the yoke in a form-fitting manner. In order to connect the stator tooth to the yoke, it is provided that a groove pointing outward in the radial direction is formed on the inner side of the yoke facing the stator shaft. The stator tooth itself has a projection on the end side, which engages in a corresponding groove of the yoke. The projection and the groove have a dovetail-shaped profile. DE 102012022868 A1 and DE 102006043673 A1, for example, show stators constructed in this way.

[0003] A problem with the known stators is their manufacture. If the yoke and the stator teeth are stamped out of sheet metal, the yoke is stamped out on the one hand and the stator teeth are also stamped out on the other hand. Due to the projections on the end faces of the stator teeth, it is usually not possible to stamp out all the stator teeth of one layer from the inner sheet metal of the annular yoke. As a result, the sheet metal waste increases and thus the costs of the stator also increase. In addition, by stamping out the yoke and the stator teeth separately from two different areas of the sheet metal, the thickness tolerances caused by the sheet metal manufacturing can increase. In other words, the yoke and the stator teeth can have different sheet metal thicknesses in the connecting area. This inaccuracy can increase in the case of multiple sheet metal layers of yoke and stator teeth arranged one after the other. Summary of the invention

[0004] The object of the present invention is to provide a stator for an electric machine which can be produced cost-effectively and has reduced thickness tolerances.

[0005] This object is achieved by the subject matter of the independent claims. Preferred developments of the invention are the subject matter of the dependent claims, the following description and the drawings. Each feature may represent an aspect of the invention both individually and in combination, as long as the description does not clearly indicate otherwise.

[0006] According to a first aspect, the present invention relates to a stator for an electric motor vehicle that is at least partially electrically driven, the stator comprising: a yoke formed in an annular shape, the yoke having an inner side facing inward in a radial direction; and stator teeth connected to the yoke in a form-fitting manner, the stator teeth having a tooth shank and a tooth top adjacent to the tooth shank, characterized in that a connecting protrusion facing inward in a radial direction is formed on the inner side of the yoke, and a connecting groove is formed on the end side of the tooth shank on the side facing away from the tooth top, and for a form-fitting connection, the connecting protrusion is at least partially and / or segmentally engaged in the connecting groove.

[0007] In other words, according to a first aspect of the invention, a stator for an electric machine is provided. The electric machine is preferably configured and / or designed to drive an at least partially electrically driven motor vehicle. In other words, the electric machine is located in a drive train of the motor vehicle.

[0008] The stator has a yoke of annular construction, wherein the yoke has an inner side on the side facing inwards in the radial direction of the yoke. In addition, the stator has at least one stator tooth. Typically, the stator has a plurality of stator teeth. The stator tooth comprises a tooth shank and a tooth top adjacent to the tooth shank. The tooth top faces inwards in the radial direction of the yoke. The stator tooth is connected to the yoke in a form-fitting manner. For this purpose, it is provided that a connecting protrusion facing inwards in the radial direction of the yoke is formed on the inner side of the yoke. A connecting groove is formed on the end side of the tooth shank on the side facing away from the tooth top. In order to connect the stator tooth to the yoke in a form-fitting manner, the stator tooth is pushed in in the axial direction of the yoke so that the connecting protrusion of the yoke engages in the connecting groove of the stator tooth at least sectionally and / or partially.

[0009] Since - in contrast to the known prior art - the connecting projection is not formed on the stator tooth but on the yoke, during the punching process of the yoke and the stator tooth from the sheet metal, the stator tooth can be adjacent to the connecting projection or arranged between two connecting projections without weakening the yoke. Thus, one or more stator teeth can be punched out of the inner sheet metal part of the annular yoke. The production costs can thus be reduced because less sheet metal waste is produced. Furthermore, since the yoke and the one or more stator teeth are punched out from a region very close to one another, the influence of thickness tolerances caused by the sheet metal can be reduced.

[0010] An advantageous improvement of the present invention is that the connecting protrusion has a shoulder protruding inwardly in the radial direction and a connecting pin. In other words, starting from the inner side in the area of ​​the connecting protrusion, a shoulder protruding inwardly in the radial direction is formed. The connecting pin is arranged on this shoulder. Therefore, the inner side is located on an imaginary first circle. The shoulder is located on an imaginary second circle, and the diameter of the second circle is smaller than the diameter of the imaginary first circle. The outer side of the connecting pin pointing in the radial direction of the yoke is located on an imaginary third circle, and the diameter of the third circle is smaller than the diameter of the imaginary second circle. The position of the center of the imaginary first circle is the same as the position of the center of the imaginary second circle, the position of the imaginary third circle, and the position of the center of the annular yoke. Due to the slightly retracted inner side, a stator tooth can be punched out between the two connecting pins, so that the end side of the tooth shank is located on the imaginary second circle and the bottom of the connecting groove is located on the imaginary third circle.

[0011] Starting from the inner side of the yoke, the shoulder has a height in the radial direction of the yoke of less than 2 mm, preferably less than 1 mm, particularly preferably less than 0.5 mm, limiting values ​​included.

[0012] Starting from the shoulder of the yoke, the connecting pin has a height in the radial direction of the yoke of greater than 1 mm and less than 5 mm, preferably greater than 1.5 mm and less than 4 mm, particularly preferably greater than 2 mm and less than 3 mm, limiting values ​​included.

[0013] In a preferred design of the present invention, it is provided that the end side of the tooth shank abuts against the shoulder, and the connecting pin engages in the connecting groove. The rigidity of the form-fitting connection can be improved by supporting the tooth shank via the end side on the shoulder of the yoke.

[0014] In principle, the form-fitting connection can be designed such that the stator teeth can be fastened and / or fixed on the yoke in a form-fitting manner.

[0015] A preferred improvement of the present invention is that the connecting pin is configured as a dovetail shape, and the connecting groove is configured corresponding to the connecting pin. In other words, the connecting groove is a negative shape relative to the dovetail-shaped connecting pin.

[0016] In a preferred embodiment of the present invention, it is provided that the transition between the end face and the side face of the tooth shank is formed in an inclined or stepped manner. The end face of the tooth shank extends between the end face and the tooth tip. By means of the inclined and / or stepped transition between the end face and the side face of the pole tooth, the width of the tooth shank in the end face region can be reduced if the width of the tooth shank in the end face region is greater than the width of the inner side between two adjacent connecting protrusions, so that for the stamping process of the stamping yoke and the stator tooth, the stator tooth can be arranged between two mutually adjacent connecting protrusions.

[0017] In principle, the stator can have only one stator tooth. An advantageous embodiment of the invention provides for a plurality of stator teeth to be provided, which are arranged spaced apart from one another in the circumferential direction of the yoke and are connected to the yoke in a form-fitting manner.

[0018] It is conceivable that the tooth tips of two adjacent stator teeth have a gap in the circumferential direction of the stator.

[0019] An advantageous development of the invention provides that the respective tooth tips of stator teeth adjacent in the circumferential direction are connected to one another via connecting webs.

[0020] It is conceivable that the connecting webs are inserted between adjacent stator teeth. Thus, the connecting webs can be made of a different material than the stator teeth.

[0021] A preferred improvement of the present invention provides that the connecting web is formed in one piece with the tooth tip. Therefore, the connecting web can be formed directly in the stamping process of forming the stator tooth.

[0022] In a second aspect, the invention relates to an electric machine having a stator according to the invention.

[0023] The electric machine is configured and / or designed to drive an at least partially electrically driven motor vehicle.

[0024] In a third aspect, the invention relates to an at least partially electrically driven motor vehicle having an electric machine.

[0025] The electric machine is located in the drive train of a motor vehicle and is part of a traction drive.

[0026] In a fourth aspect, the present invention relates to a method for manufacturing a stator according to the present invention, wherein a sheet is provided and a yoke of annular construction is punched out in a first punching process, and at least one stator tooth is punched out in a second punching process, wherein the stator tooth is punched out of the sheet in such a way that the stator tooth faces the inner side of the yoke with its end side and is arranged adjacent to and / or offset to connecting protrusions and / or connecting pins in the circumferential direction of the yoke.

[0027] In other words, according to a fourth aspect of the present invention, it is provided that at least one sheet material is provided, from which a yoke and at least one stator tooth are punched out. It is provided that a yoke of annular configuration is punched out of the sheet material in a first punching process. At least one stator tooth is punched out in a second punching process. The yoke and the stator tooth are punched out of the sheet material in such a way that the end side of the stator tooth faces the inner side of the yoke to be punched out or the negative contour of the punched out yoke. In addition, the stator tooth is punched out of the sheet material in a manner offset in the circumferential direction of the yoke relative to the connecting protrusions and / or connecting pins of the yoke. Preferably, the stator tooth axis extending centrally through the stator tooth extends in the radial direction of the yoke or in the radial direction of the negative contour of the yoke punched out of the sheet material.

[0028] Since the connecting projection is not formed on the stator tooth but on the yoke, the stator tooth can be arranged adjacent to the connecting projection and / or the connecting pin during the punching process of the yoke and the stator tooth from the sheet without significantly weakening the yoke. Thus, one or more stator teeth can be punched out of the inner sheet metal part of the annular yoke. Thus, the manufacturing costs can be reduced because less sheet metal waste is produced. Furthermore, since the yoke and the one or more stator teeth are punched out from a region very close to each other, the influence of thickness tolerances caused by the sheet metal can be reduced.

[0029] Advantageously, it is proposed that the inner side of the yoke lies on an imaginary first circle. The shoulder of the connecting protrusion lies on an imaginary second circle, the diameter of which is smaller than the diameter of the imaginary first circle. The outer side of the connecting pin oriented in the radial direction of the yoke lies on an imaginary third circle, the diameter of which is smaller than the diameter of the imaginary second circle. This arrangement also applies to the negative contour of the yoke punched out of the sheet metal. The layer of stator teeth is arranged on the sheet metal so that the end side of the tooth shank lies on the imaginary second circle and the bottom of the connecting groove lies on the imaginary third circle. This has the advantage that the stator teeth or all stator teeth in the case of a plurality of stator teeth can be punched out near the corresponding connecting protrusion. As a result, the thickness tolerance is reduced. In addition, sheet metal waste can be reduced. This has a positive effect on the manufacturing costs of the stator.

[0030] A preferred design of the present invention is to perform multiple first punching processes in sequence, wherein after a first punching process, the first punching tool and / or the sheet are rotated relative to each other by a defined angle before the next first punching process is performed. The yoke is punched out via the first punching process. Thus, multiple yokes are punched out and superimposed or stacked in sequence. Preferably, the stacked sheets are connected to each other by material fit, shape fit and / or force fit. The material fit connection can preferably be an adhesive connection. The shape fit connection can be a stamped connection. The force fit connection can preferably be a connection via screws and / or tie rods.

[0031] In an advantageous development of the invention, it is provided that a plurality of second punching processes are carried out in succession, wherein after a second punching process, the second punching tool and / or the sheet metal are rotated relative to one another by a defined angle before the next punching process is carried out. One or more stator teeth of a layer are punched out via the second punching process. A plurality of stator teeth or a stator tooth of each layer are arranged in succession and connected to one another in a materially and / or form-fitting manner. The form-fitting is preferably carried out via a stamping connection. The materially fitting is preferably an adhesive connection.

[0032] A preferred design of the present invention is that the first punching tool and the second punching tool are rotated by the same angle between two punching processes. Therefore, the thickness tolerance of the sheet metal can be compensated via the length of the stator in the axial direction of the stator.

[0033] It is conceivable that the first punching tool and the second punching tool are integral components of the punching device.

[0034] It is conceivable that the first punching process and the second punching process are performed simultaneously or synchronously. Simultaneously preferably means that the start of the first punching process starts with the start of the second punching process and the two punching processes also end together. Synchronously means that the first punching process or the second punching process starts and the corresponding other punching process starts before the first or second punching process ends.

[0035] However, it is also conceivable that the first punching process and the second punching process are carried out temporally sequentially and / or are carried out temporally offset relative to one another.

[0036] In this context, it is conceivable to first carry out the first punching process and then the second punching process.

[0037] Alternatively and also preferably, it is provided that the second punching process is carried out before the first punching process. In other words, at least one stator tooth is punched out first. Then the yoke is punched out. This has the advantage that two punching processes can be carried out while only the sheet metal is fixed and / or fastened outside the yoke.

[0038] It should be noted that all features described above and below for one aspect of the invention are also applicable to any other aspect of the invention. In particular, all features of the stator may also be features of the electric machine and / or motor vehicle and / or the method for manufacturing the stator. And vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Further features and advantages of the invention can be derived from the dependent claims and the following examples. These examples should not be understood as limiting, but rather as illustrative. They are intended to enable a person skilled in the art to implement the invention. The applicant reserves the right to make one and / or more of the features disclosed in the examples the subject of a claim or to incorporate these features into existing claims. The examples are explained in detail with the aid of the drawings.

[0040] In the attached picture:

[0041] Figure 1 shows a top view of a sheet from which the yoke layers and stator teeth can be punched out,

[0042] Figure 2 Detail view showing the punched stator teeth,

[0043] Figure 3 shows a plan view of a layer of stator teeth which are arranged spaced apart from one another in the circumferential direction,

[0044] Figure 4shows a detail view of two stator teeth connected to each other via a connecting web,

[0045] Figure 5 shows a cross section of a stator tooth in the longitudinal direction of the stator,

[0046] Figure 6 A top view of the punched yoke is shown,

[0047] Figure 7 A detailed view of the yoke in the region of the connecting protrusion is shown,

[0048] Figure 8 shows a three-dimensional view of the annular yoke,

[0049] Fig. 9 A detail view showing the stator teeth connected to the yoke,

[0050] Fig.10 shows a top view of a stator, wherein a plurality of stator teeth are connected to a yoke,

[0051] Fig.11 A motor vehicle with an electric motor is shown,

[0052] Fig.12 A method for manufacturing a stator is shown. DETAILED DESCRIPTION

[0053] exist Figure 1 , a plan view of a sheet BL is shown, from which a ring-shaped yoke JO and at least one stator tooth SZ can be punched out. The sheet BL can preferably be designed as a strip. It is conceivable that the sheet BL has at least one fixing and / or positioning groove BA. The fixing groove BA can preferably be designed as a groove that is closed at the edges and penetrates the sheet. In the present case, the sheet BL has four fixing grooves BA that are spaced apart from each other. The fixing grooves BA are preferably used to position and / or fasten the sheet BL in a punching device (not shown).

[0054] The contour of the annular yoke JO is shown on the sheet. The contour of the stator teeth SZ can also be seen. In this embodiment, a total of 48 stator teeth SZ are arranged side by side in the circumferential direction of the yoke JO. The number of stator teeth SZ can vary depending on the stator design.

[0055] Figure 2 A detailed view of a punched-out stator tooth SZ is shown. In addition, a portion of the annular yoke JO can be seen. The yoke JO has an inner side IS on the inner side of the yoke JO in the radial direction. On the inner side IS, a plurality of connecting protrusions VV are formed at regular intervals in the circumferential direction of the yoke JO. The connecting protrusions VV are arranged at regular intervals. Figure 2Each connection projection VV comprises a shoulder ST protruding inwardly in the radial direction of the yoke JO and a connection pin VZ protruding inwardly in the radial direction of the yoke JO.

[0056] The stator tooth SZ comprises a tooth shank ZS and a tooth tip ZK adjoining the tooth shank. On the side facing away from the tooth tip ZK, the tooth shank ZS has an end side SS. On the end side SS of the tooth shank ZS, a connecting groove VA is formed facing the tooth tip ZK, which is formed corresponding to the contour of the connecting pin VZ. In other words, the connecting groove VA is the negative contour of the connecting pin VZ. In the present case, the connecting pin VZ and the connecting groove VA have a dovetail-shaped design.

[0057] The stator tooth SZ is punched out of the sheet metal BL such that the tooth shank ZS is arranged at least in sections between two connecting projections VV adjacent in the circumferential direction of the yoke JO. The end face SS of the tooth shank ZS faces the inner side IS of the yoke JO.

[0058] It can also be seen that the inner side is located on an imaginary first circle FEK. The shoulder ST is located on an imaginary second circle FZK, the diameter of which is smaller than the diameter of the imaginary first circle FEK. The outer side AS of the connecting pin VZ oriented in the radial direction of the yoke JO is located on an imaginary third circle FDK, the diameter of which is smaller than the diameter of the imaginary second circle FZK. It should be noted that the imaginary first circle, the imaginary second circle and the imaginary third circle all have the same center, which is also the center of the yoke JO. By slightly retracting the inner side IS, a stator tooth SZ can be punched out between two adjacent connecting pins VZ, so that the end side SS of the tooth shank ZS is located on the imaginary second circle FZK, and the bottom GR of the connecting groove VA is located on the imaginary third circle FDK.

[0059] The transition UEG between the end side SS and the side surface SF of the tooth shank ZS is designed in a stepped manner. The side surface SF of the tooth shank ZS extends from the end side SS to the tooth tip ZK. Due to the transition UEG designed in a stepped manner between the end side SS and the side surface SF of the stator tooth ZS, the width of the tooth shank ZS in the region of the end side SS can be locally reduced if the width of the tooth shank ZS in the region of the end side SS is greater than the width of the inner side IS between two adjacent connecting protrusions VV, so that for the stamping process for stamping the yoke JO and the stator tooth SZ, the stator tooth SZ can be arranged or punched out between two mutually adjacent connecting pins VZ.

[0060] It is conceivable that adjacent stator teeth SZ of a sheet metal layer have an interruption in the region of the tooth tips ZK. In the present case, adjacent tooth tips are connected to one another via connecting webs SG.

[0061] Figure 3The plan view shows a layer of a total of 48 stator teeth SZ, which are arranged spaced apart from one another in the circumferential direction, wherein the tooth tips ZK of adjacent stator teeth SZ are connected to one another via connecting webs SG.

[0062] Figure 4 A detailed view of two stator teeth SZ arranged side by side and connected to one another via a connecting web SG is shown. The stator tooth axis SZA runs through each stator tooth SZ. The tooth shank ZS is designed to taper over its entire length, starting from the end side SS or from the transition section UEG, toward the tooth tip ZK. The gap SP between the side faces SF of two adjacent tooth shanks ZS has a constant width. In this way, a stator winding (not shown) designed as a mat can be inserted into the gap SP between the stator teeth SZ from the side facing away from the connecting web SG.

[0063] Figure 5 A section through a stator tooth SZ in the longitudinal direction of the stator ST is shown. In the longitudinal direction of the stator ST, a plurality of individual sheet metal sheets BL of the stator tooth SZ are arranged one behind the other and connected to one another via a stamped connection PV. It can be seen that in some sheet metal layers, the tooth tips ZK of adjacent stator teeth SZ are connected to one another via connecting webs SG, while in other sheet metal layers there are no connecting webs SG or the tooth tips ZK of adjacent stator teeth SZ are not connected to one another, i.e. are constructed without webs.

[0064] Figure 6 An annular punched yoke JO is shown, which has connecting projections VV formed spaced apart from one another on the inner side IS of the yoke JO in the circumferential direction of the yoke JO. The 48 connecting projections VV are spaced apart from one another at regular intervals. The center point MP of the annular yoke JO is also shown.

[0065] Figure 7 A detailed view of the yoke JO is shown in the region of two adjacently arranged connecting projections VV. On the outer side of the yoke JO, which faces outwards in the radial direction of the yoke JO, an indexing groove IN is formed so that the orientation of the yoke JO can be clearly selected or determined at a later moment. The connecting projection VV is passed through the projection axis VSA, which extends in the radial direction of the yoke JO. The shoulder ST and the connecting pin VZ are formed mirror-symmetrically with respect to the projection axis VSA.

[0066] Figure 8 A three-dimensional view of an annular yoke JO is shown, which has a plurality of yoke layers arranged one behind the other. The individual layers are arranged one behind the other so that the connecting projections VV are aligned in the longitudinal direction of the stator or the yoke JO. In other words, the connecting projections VV extend parallel to the stator axis or the yoke axis over the entire length of the stator. The individual yoke layers are connected to one another via a stamped connection and / or an adhesive connection.

[0067] Fig. 9A detailed view of a stator tooth SZ connected in a form-fitting manner to the yoke JO is shown. The stator tooth SZ is pushed onto the connecting projection VV in the longitudinal direction of the yoke JO so that the connecting pin VZ of the yoke JO engages in the connecting recess VA of the stator tooth SZ. The end side SS of the tooth shank ZS rests against the shoulder ST of the yoke JO. The projection axis VSA of the yoke JO is aligned with the stator tooth axis SZA of the stator tooth SZ.

[0068] Fig.10 A top view of a stator ST is shown, wherein a plurality of stator teeth SZ are connected to a yoke JO in a form-fitting manner. Before the stator teeth SZ are connected to the yoke JO, a stator winding (not shown) is placed in the gaps SP between the tooth shanks ZS.

[0069] Fig.11 An at least partially electrically driven motor vehicle KFZ is shown, which has an electric machine EM with a stator ST. The electric machine EM is located in the drive train of the motor vehicle KFZ. The electric machine is a component of a traction drive.

[0070] exist Fig.12 A method for manufacturing a stator ST is shown in FIG.

[0071] In a first step 100 , a sheet metal BL is provided and fed to a punching device.

[0072] In a second step 110 , the annular yoke JO is punched out by means of a first punching process.

[0073] In a third step 120, at least one stator tooth SZ is punched out by means of a second punching process, wherein the stator tooth SZ is punched out on the sheet BL so that the stator tooth faces the inner side IS of the yoke JO with its end side SS and is arranged adjacent to and / or offset to the connecting protrusion VV and / or the connecting pin VZ in the circumferential direction of the yoke JO.

[0074] In a fourth step 130 , the yoke JO and the stator teeth SZ are connected in a form-fitting manner.

[0075] Since the connecting protrusion VV is not formed on the stator tooth SZ but on the yoke JO, during the stamping process for punching out the yoke JO and the stator tooth SZ from the sheet BL, the stator tooth SZ can be arranged adjacent to the connecting protrusion VV and / or the connecting pin VZ without weakening the yoke. Therefore, one or more stator teeth SZ can be punched out from the inner sheet part of the annular yoke JO. The manufacturing costs of the stator ST are thus reduced because the sheet waste is reduced. In addition, since the yoke JO and one or more stator teeth SZ are punched out from areas very close to each other, the influence of thickness tolerances caused by the sheet BL can be reduced.

Claims

1. A stator (ST) for an electric machine (EM) of an at least partially electrically driven motor vehicle (KFZ), the stator comprising: a yoke (JO) of annular configuration, the yoke having an inner side (IS) facing inwards in a radial direction; and A stator tooth (SZ) connected in a form-fitting manner to the yoke (JO), the stator tooth having a tooth shank (ZS) and a tooth tip (ZK) adjoining the tooth shank (ZS), characterized in that: A connecting protrusion (VV) is formed on the inner side (IS) of the yoke (JO) and points inward in the radial direction, and A connecting groove (VA) is formed on an end face (SS) of the tooth shank (ZS) on a side facing away from the tooth tip (ZK), and For a positive connection, the connecting projection (VV) engages at least partially and / or in sections into the connecting recess (VA).

2. The stator according to claim 1, characterized in that: The connecting projection (VV) has a connecting pin (VZ) and a shoulder (ST) protruding inwardly in the radial direction.

3. The stator according to claim 2, characterized in that: The end face (SS) of the toothed shank (ZS) bears against the shoulder (ST), and the connecting pin (VZ) engages in the connecting groove (VA).

4. The stator according to claim 3, characterized in that: The connecting pin (VZ) is designed in a dovetail shape and the connecting groove (VA) is designed corresponding to the connecting pin (VZ).

5. A stator according to any one of the preceding claims, characterized in that The transition (UEG) between the end face (SS) and the side face (SF) of the pole tooth (PZ) is designed to be inclined or stepped.

6. A stator according to any one of the preceding claims, characterized in that A plurality of stator teeth (SZ) are provided, which are arranged spaced apart from one another in the circumferential direction of the yoke (JO) and are connected to the yoke (JO) in a form-fitting manner.

7. A stator according to any one of the preceding claims, characterized in that The respective tooth tips (ZK) of stator teeth (SZ) adjacent in the circumferential direction are connected to one another via connecting webs (SG).

8. The stator according to claim 7, characterized in that: The connecting web (SG) is designed integrally with the tooth tip (ZK).

9. A method for producing a stator (ST) according to any one of the preceding claims, characterized in that A sheet (BL) is provided, from which a yoke (JO) of annular configuration is punched out in a first punching process, and In a second stamping process, at least one stator tooth (SZ) is punched out, wherein the stator tooth (SZ) is punched out on the sheet (BL) so that the stator tooth is directed with its end side (SS) toward the inner side (IS) of the yoke (JO) and is arranged adjacent to and / or offset to a connecting protrusion (VV) and / or a connecting pin (VZ) in a circumferential direction of the yoke (JO).

10. The method according to claim 9, characterized in that A plurality of first punching processes are carried out in succession, wherein after a first punching process the first punching tool and / or the sheet metal (BL) are rotated relative to one another by a defined angle before carrying out the next first punching process.

11. The method according to claim 9 or 10, characterized in that: A plurality of second punching processes are carried out in succession, wherein after a second punching process the second punching tool and / or the sheet metal (BL) are rotated relative to one another by a defined angle before carrying out the next second punching process.

12. The method according to any one of claims 9 to 11, characterized in that The first punching tool and the second punching tool are rotated by the same angle between two punching processes.

13. The method according to any one of claims 9 to 12, characterized in that The first punching process and the second punching process are performed simultaneously or synchronously.

14. The method according to any one of claims 9 to 13, characterized in that The first punching process and the second punching process are carried out sequentially in time and / or offset in time.

15. The method according to claim 14, characterized in that The second punching process is performed before the first punching process.

16. An electric machine (EM) having a stator (ST) according to any one of claims 1 to 8.

17. A motor vehicle (KFZ) having an electric machine (EM) according to claim 16.

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