Stator arrangement for an electric machine having a simplified assembly of a stator laminate core
By assembling and designing cooling channels in specific areas of the stator lamination core, the problem of debris during the assembly of the stator lamination core and the stator housing was solved, achieving motor safety and efficient cooling, and simplifying the manufacturing process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- VALEO NEW ENERGY VEHICLES GERMANY GMBH
- Filing Date
- 2024-08-02
- Publication Date
- 2026-04-24
AI Technical Summary
In the prior art, metal debris is easily generated when the stator lamination core is assembled with the stator housing, which can lead to motor damage or failure, especially when the stator lamination core is inserted at an angle, which is difficult to avoid.
The stator lamination core is assembled into the stator housing only in a specific area on its end face, leaving free space between the two areas. The first mounting base is further outward to avoid direct contact. Different fitting methods are used, such as loose fit, transition fit or interference fit, combined with the cooling channel design.
It reduces debris formation, lowers the risk of motor damage, simplifies the manufacturing process, improves cooling efficiency, and reduces the need for heating the stator housing.
Smart Images
Figure CN121925774A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a stator assembly for an electric motor, comprising a stator housing and a stator disposed within the stator housing and having a stator lamination core having a plurality of stator laminations axially stacked on top of each other, the stator lamination core being assembled into the stator housing. Furthermore, this invention relates to an electric motor having a stator assembly of the above type and a vehicle having such an electric motor. Finally, this invention also relates to a method for manufacturing a stator assembly of the aforementioned type. Background Technology
[0002] The types of stator assemblies, motors, vehicles, and manufacturing methods mentioned are known in principle from the prior art. Stator laminations are stacked on top of each other to form a stator lamination core, and then the stator lamination core or the completed stator is assembled into a stator housing.
[0003] A relatively tight fit between the stator lamination core and the stator housing is problematic because metal debris can be unintentionally pulled out, particularly from the inner contour of the stator housing, when the stator lamination core or stator is inserted or pushed into the stator housing. This debris can then unnoticed enter the motor interior, where it can cause damage or even motor failure during operation. This phenomenon occurs particularly (but not limited to) when the stator lamination core or stator is tilted, i.e., when the stator lamination core or stator is not precisely guided in the axial direction when inserted into the stator housing. Even with a very tight fit between the stator lamination core and the stator housing, debris formation is often not prevented, even if the stator lamination core or stator is precisely guided axially.
[0004] To prevent debris formation, the stator housing can be expanded by heating before the stator lamination core is inserted (a thermal bonding process). Then, as the stator housing shrinks due to cooling, the two components are assembled. However, this process is time-consuming and costly. Furthermore, this process cannot be used in cases where the stator housing is complex enough to house not only the motor but also the transmission and inverter, due to the risk of torsion. Summary of the Invention
[0005] Therefore, the object of the present invention is to provide an improved stator assembly, an improved electric motor, an improved vehicle, and an improved method of manufacturing a stator assembly for an electric motor. In particular, it is intended to avoid the formation of debris during the insertion or pushing of the stator lamination core or the stator into the stator housing without heating the stator housing before inserting the stator lamination core, thereby preventing damage to the motor or motor malfunction.
[0006] The object of the present invention is achieved by a stator device of the type mentioned at the beginning, wherein,
[0007] - The stator lamination core is assembled into the stator housing only at the first mounting base in the region of the first end face of the stator lamination core and at the second mounting base in the region of the second end face of the stator lamination core, and there is a free space between the first mounting base and the second mounting base.
[0008] - The first mounting base is radially further outward relative to the stator axis than the second mounting base.
[0009] Furthermore, the object of the present invention is achieved by an electric motor having a stator arrangement of the type described above. In particular, the stator lamination core may have a plurality of stator windings arranged therein. The electric motor may particularly include a rotor arranged in the stator and rotatably mounted in a housing about a rotor axis, the rotor having rotor windings or rotor magnets.
[0010] Furthermore, the object of the present invention is achieved by a vehicle having a motor of the type described above, which is configured to drive the vehicle.
[0011] The object of the present invention is also achieved by a method for manufacturing a stator assembly for an electric motor, the method comprising the following steps:
[0012] - Provides a stator housing and a stator having a stator lamination core having a plurality of stator laminations stacked axially on top of each other.
[0013] - Insert the stator lamination core into the stator housing, wherein,
[0014] - The stator lamination core is assembled into the stator housing only at the first mounting seat in the region of the first end face of the stator lamination core and at the second mounting seat in the region of the second end face of the stator lamination core, and there is a free space between the first mounting seat and the second mounting seat.
[0015] - The first mounting base is radially further outward relative to the stator axis than the second mounting base.
[0016] The proposed measures prevent or at least reduce debris formation during the insertion or pushing of the stator lamination core or stator into the stator housing. This also prevents the risk of motor damage or malfunction. This is achieved, on the one hand, through the use of mounting bases of different sizes, and on the other hand, through the gaps between the mounting bases. As a result, contact between the stator lamination core and the stator housing outside the mounting base is effectively eliminated. Therefore, if debris formation does occur, it is minimized.
[0017] In summary, a stator with a helical connection or clamping can be provided, which is radially supported only on two axial sides. Furthermore, heating of the stator housing can be eliminated or minimized. As another advantage, the intermediate space between the stator housing and the stator lamination core, available due to the clearance, can be used as a cooling channel.
[0018] In the given context, the phrase "in the region of the end face" specifically refers to a region extending axially from the end face in the direction of the center of the stator lamination core, with an axial length of at most 25% of the total length of the stator lamination core. Specifically, this region may be directly adjacent to the end face. However, the region may also be slightly spaced from the end face and have a length less than 25% of the total length of the stator lamination core.
[0019] Further advantageous improvements and developments of the invention arise from the dependent claims and the description taken in conjunction with the accompanying drawings.
[0020] Advantageously, the stator laminations are directly assembled into the stator housing, for example, in direct radial contact with the stator housing, and have a greater radial extension in the region of the first end face of the stator lamination core than in the region of the second end face. Thus, the stator lamination core can, in principle, be inserted into the stator housing without any other components, which allows for a shorter list of parts used to construct the motor.
[0021] Another advantage is...
[0022] - All stator laminations have the same radial extension range.
[0023] - In the region of the first end face, the stator lamination core has a spacer ring, the stator laminations are assembled into the spacer ring, and the spacer ring is assembled into the stator housing, and
[0024] - In the region of the second end face, the stator laminations are directly assembled into the stator housing.
[0025] In this way, the stator lamination core can be constructed using the same or similar stator laminations, which makes the manufacturing of the stator lamination core particularly efficient.
[0026] Furthermore, it is advantageous that
[0027] - The spacer ring has a stop portion, and the end face stator lamination or the outermost stator lamination in the region of the first end face of the stator lamination core abuts against the stop portion, and
[0028] - The spacer ring is spirally connected to the stator housing in the axial direction.
[0029] This allows the spacer ring to be axially positioned on the stator lamination core in a simple manner.
[0030] Advantageously, the stator housing has a stop portion against which the second end face of the stator lamination core is supported. This allows the stator lamination core to be axially positioned in the stator housing in a simple manner.
[0031] In another implementation variation, the stator lamination core can be helically connected to the stator housing in the axial direction. This allows for the connection of the stator lamination core to the stator housing using readily available components.
[0032] In another implementation variation, the stator lamination core can be threaded to the spacer ring in the axial direction. This allows the stator lamination core to also be connected to the spacer ring using readily available components.
[0033] In addition, a first mounting base and / or a second mounting base can be configured:
[0034] - It is cylindrical, or
[0035] - It has a shape different from that of a cylinder.
[0036] Cylindrical mounts are particularly easy to manufacture. If the mount is cylindrical, the stator lamination core has a larger diameter in the region of the first end face than in the region of the second end face. If the first mount and / or the second mount has a shape other than that of a cylinder, this also achieves the function of torque support between the stator and the stator housing.
[0037] Furthermore, the assembly between the stator lamination core and the stator housing at the first and / or second mounting bases can be designed as a loose fit, transition fit, or interference fit. When a loose fit is used, the risk of chip formation is minimized, while an interference fit allows for good centering and fixation of the stator lamination core within the stator housing. The use of a transition fit provides a good compromise between loose and interference fits. It is also conceivable to use different fits for the two mounting bases. For example, the fit at the first mounting base can be designed as an interference fit, and the fit at the second mounting base can be designed as a loose fit, and vice versa. This also provides a good compromise between avoiding chip formation and ensuring good centering and fixation of the stator lamination core within the stator housing.
[0038] Another advantage is that the stator housing has cooling channels for the cooling medium. This design allows for efficient cooling of the stator. Liquids, such as water- or oil-based liquids, are particularly suitable as cooling media, but gaseous cooling media can also be considered.
[0039] In a particularly advantageous embodiment variant, the cooling channel is defined by the stator housing and stator laminations, wherein, when spacer rings are present, the cooling channel is additionally defined by spacer rings.
[0040] This enables particularly effective cooling of the stator.
[0041] In another advantageous embodiment variation, a cooling channel section can branch axially from the cooling channel, terminating inside the motor to cool components disposed there, such as the winding heads of the stator windings. For this purpose, the axial boundary of the cooling channel can be provided with an opening through which cooling medium flows from the cooling channel into the cooling channel section. Coolant flowing out of the cooling channel section can, for example, be directed as a coolant jet to the winding heads of the stator or rotor windings.
[0042] Another advantage is that the first and / or second mounting bases are liquid-tight. In this way, further sealing of the cooling channels can be eliminated.
[0043] Another advantage is that the spacer ring has an integrally formed end plate with a bearing housing for the motor's rotor shaft or for a bearing on the rotor shaft. In this way, the spacer ring achieves a dual function.
[0044] It is also particularly advantageous that the stator laminations are directly mounted into the stator housing and have a greater radial extension in the region of the first end face than in the region of the second end face, wherein the radial extension is reduced in the region of the second end face and / or the region of the gap by removing material. This allows the same or similar stator laminations to be used for the construction of the stator lamination core, since their radial extension is adjusted in further manufacturing steps. In particular, material can be removed by machining the stator lamination core. Attached Figure Description
[0045] Exemplary embodiments of the invention are illustrated by way of example in the accompanying drawings. In the drawings:
[0046] Figure 1 A first example of a motor is shown schematically in half-section;
[0047] Figure 2 Another exemplary motor with an axial stop for the stator lamination core is shown;
[0048] Figure 3 Another exemplary motor with a spacer ring is shown;
[0049] Figure 4 An exemplary motor is shown, wherein the spacer ring has a stop portion for the stator lamination core;
[0050] Figure 5 An exemplary motor is shown, wherein the spacer ring has an integrally formed end plate;
[0051] Figure 6 An exploded view of the stator assembly is shown, in which the mounting base has a contour that is not circular;
[0052] Figure 7 The view from the oblique view is shown Figure 6 The stator assembly is ready for assembly;
[0053] Figure 8 An alternative design for the stator assembly is shown, in which the mount has an off-circular profile; and
[0054] Figure 9 An exemplary vehicle with the proposed type of motor is shown. Detailed Implementation
[0055] By way of description, it is indicated that identical components in different embodiments are given the same reference numerals or the same component names, and may have different indexes where appropriate. The disclosure of a component in the specification can be similarly transferred to another component having the same reference numerals or the same component name. Furthermore, positional terms selected in the specification, such as "top," "bottom," "rear," "front," "side," etc., refer to the drawings that are directly described and shown, and should be similarly transferred to the new position if the position changes.
[0056] Figure 1 A half-section through the schematically shown motor 1a is shown. Motor 1a includes a rotor shaft 2 and a rotor lamination core 3 mounted on the rotor shaft, the rotor lamination core having a plurality of rotor laminations (not shown in detail) as part of a rotor 4. The rotor shaft 2 is rotatably mounted about a rotor axis or stator axis A by means of (roller) bearings 5a, 5b. Specifically, a first bearing 5a is located in a first front end plate 6a, and a second bearing 5b is located in a second rear end plate 7a. Furthermore, motor 1a includes a stator housing 8a, which connects the front end plate 6a and the rear end plate 7a and together with them forms the machine housing 9a of motor 1a.
[0057] The stator 10a or its stator lamination core 11a is assembled in the stator housing 8a. The stator lamination core 11a has a plurality of stator laminations 12 stacked axially on top of each other, and may also accommodate optional stator windings 13. The stator housing 8a and the stator 10a or the stator lamination core 11a form a stator assembly 14a or at least a part thereof.
[0058] The stator lamination core 11a is assembled into the stator housing 8a..8g only at the first mounting seat 15a in the first end face B1 region of the stator lamination core 11a and at the second mounting seat 15b in the second end face B2 region of the stator lamination core 11a, and is free to leave space between the two. The first mounting seat 15a is radially further outward relative to the stator axis A of the stator 10a than the second mounting seat 15b.
[0059] exist Figure 1 In the example shown, the stator lamination 12 is directly assembled into the stator housing 8a and has a larger radial extension in the region of the first end face B1 than in the region of the second end face B2. As a result, in this example, the stator lamination core 10a is assembled into the stator housing 8a without any other components, which keeps the list of components that can be used to construct the motor 1a relatively short.
[0060] exist Figure 1 In the example shown, the stator housing 8a has an optional cooling channel 16 for a (liquid or gaseous) cooling medium. This allows the motor 1a to be integrated into the cooling circuit and the stator 10a to be effectively cooled. Specifically, in the given example, the cooling channel 16 is formed between the stator housing 8a and the stator laminations 12 of the stator lamination core 11a, wherein the cooling channel 16 is directly adjacent to the stator laminations 12. This results in particularly high cooling efficiency. It is also advantageous in the given context if the first mounting base 15a and / or the second mounting base 15b are liquid-tight. In this way, further sealing of the cooling channel 16 can be omitted.
[0061] Typically, the assembly between the stator lamination core 11a and the stator housing 8a at the first mounting base 15a and / or the second mounting base 15b can be designed as a loose fit, transition fit, or interference fit. When a loose fit is used, the risk of chip formation is minimized, while an interference fit allows for good centering and fixation of the stator lamination core 11a within the stator housing 8a. The use of a transition fit provides a good compromise between loose and interference fits. It is also conceivable to use different fits for the two mounting bases 15a and 15b. For example, the fit at the first mounting base 15a can be designed as an interference fit, and the fit at the second mounting base 15b can be designed as a loose fit, and vice versa. This also provides a good compromise between avoiding chip formation and ensuring good centering and fixation of the stator lamination core 11a within the stator housing 8a.
[0062] Figure 2 An example of motor 1b is now shown, which is related to Figure 1 The motor 1a shown is very similar. In contrast, the stator housing 8b has a stop 17 on which the second end face B2 of the stator lamination core 11b rests. This allows the stator lamination core 11b to be axially positioned in the stator housing 8b in a simple manner. Furthermore, the stator lamination core 11b is threaded onto the stator housing 8b in the axial direction with screws 18, and is thus permanently fixed in the stator housing 8b.
[0063] Figure 3 An example of motor 1c is shown, which is related to Figure 2The motor 1b shown is very similar. In contrast, in the region of the first end face B1, the stator lamination core 11c of the motor 1c has a spacer ring 19c, into which some of the stator laminations 12 are fitted. The spacer ring 19c is fitted into the stator housing 8c in itself. On the other hand, in the region of the second end face B2, the stator laminations 12 are directly fitted into the stator housing 8c. Advantageously, in this example, all the stator laminations 12 have the same radial extension, thereby allowing for efficient manufacturing of the stator laminations.
[0064] In this example, an optional cooling channel 16 is formed between the stator housing 8c, the spacer ring 19c, and the stator lamination core 11c, wherein the cooling channel 16 is directly adjacent to the stator lamination 12 and is therefore able to cool the stator 10c particularly effectively.
[0065] It is generally conceivable that cooling channel 16 is hydraulically connected to an axially extending channel leading into the interior of motor 1a..1c, or hydraulically connected to an outlet opening facing the stator axis A and leading into the interior of motor 1a..1c. In this way, other parts of motor 1a..1c can also be cooled. For example, coolant jets can be directed to the winding heads of rotor 4 and / or stator 10a..10c.
[0066] Figure 4 An example of motor 1d is shown, which is compared with Figure 3 The motor 1c shown is very similar. In contrast, the spacer ring 19d has a stop 20 against which the outermost stator lamination 12 in the region of the first end face B1 of the stator lamination core 11d is supported. This allows the spacer ring 19d to be axially positioned on the stator lamination core 11d in a simple manner. To secure the spacer ring 19d to the stator lamination core 11d, the spacer ring 19d is threaded axially onto the stator housing 8d using screws 18.
[0067] Figure 5 Another example of motor 1e is shown, which is similar to Figure 4 The motor 1d shown is very similar. In contrast, the spacer ring 19e has an integrally formed end plate 6e, which has a bearing housing for the rotor shaft 2 or a bearing housing for the bearing 5a. In this way, the spacer ring 19e achieves a dual function.
[0068] The method for manufacturing the stator assembly 14a..14e for the motor 1a..1e may particularly include the following steps:
[0069] - Provides stator housings 8a..8e and stator 10a..10e, the stator having a stator lamination core 11a..11e of the type described above, and
[0070] - The stator lamination core 11a..11e is inserted into the stator housing 8a..8e, wherein the stator lamination core 11a..11e is pushed into the stator housing 8a..8e with the second mounting base 15b in front.
[0071] The proposed measures prevent or at least reduce debris formation during the insertion or pushing of the stator lamination cores 11a..11e or the stator 10a..10e into the stator housing 8a..8e. This also prevents the risk of damage to or failure of the motor 1a..1e. Due to the different sizes of the mounting seats 15a, 15b and the gap between them, contact between the stator lamination cores 11a..11e and the stator housing 8a..8e outside the mounting seats 15a, 15b can be practically prevented. Therefore, if debris formation occurs, it is minimized. To largely prevent the formation of debris at the mounting bases 15a, 15b, it may also be specified that the stator housing 8a..8e is heated relative to the stator lamination core 11a..11e and / or cooled relative to the stator housing 8a..8e before the stator lamination core 11a..11e is pushed into the stator housing 8a..8e.
[0072] In particular, such as Figure 1 and Figure 2 As shown, the stator laminations 12 can be directly assembled into the stator housings 8a, 8b, and can have a larger radial extension in the region of the first end face B1 than in the region of the second end face B2. The reduction in the radial extension in the region of the second end face B2 and / or the gap region can be advantageously achieved by removing material. This allows the same or similar stator laminations 12 to be used for the construction of the stator lamination cores 11a, 11b, since their radial extension is adjusted in further manufacturing steps. In particular, material can be removed by machining the stator lamination cores 11a, 11b.
[0073] In the previous example, the first mounting base 15a and the second mounting base 15b are preferably cylindrical. However, this is not the only foreseeable option. Rather, it is also conceivable that the first mounting base 15a and / or the second mounting base 15b have a shape that deviates from a cylinder, as shown in reference... Figures 6 to 8 shown. Specifically, Figure 6 and Figure 7 A first example of this stator device 14f is shown, which in Figure 6 The diagram is shown in the exploded view and in Figure 7 The stator assembly 14f, ready for assembly, is shown in a perspective view. Figure 8 An alternative design for the stator assembly 14g is shown, in which the mounts 15a and 15b have slightly different profiles and deviate from a circular shape.
[0074] Typically, cylindrical assemblies are particularly easy to manufacture. In this case, the stator lamination cores 11a..11e have a larger diameter in the region of the first end face B1 than in the region of the second end face B2. If the first assemblies 15a and / or the second assemblies 15b have a shape different from that of a cylinder, this also achieves the function of torque support between the stators 10a..10g and the stator housings 8a..8g.
[0075] Figure 9 Finally, the motor 1 installed in vehicle 21 is shown. Vehicle 21 has two axles, one of which is driven. Specifically, motor 1 is connected to the half-shaft 23 of either the rear or front axle via an optional transmission 22. Finally, driven wheel 24 is mounted on half-shaft 23. Motor 1, transmission 22, and half-shaft 23 are here part of the drivetrain of vehicle 21. Vehicle 21 is driven at least partially or temporarily by motor 1. This means that motor 1 can be used as the sole drive of vehicle 21, or, for example, can be combined with an internal combustion engine (hybrid drive).
[0076] In summary, it should be noted that the scope of protection is determined by the claims. However, the specification and drawings should be used to interpret the claims. Features included in the drawings may be interchanged and combined with each other as needed. In particular, it should also be noted that the illustrated device may actually include even more or even fewer components than shown. In some cases, the illustrated device or its components may also be shown out of scale and / or at an enlarged and / or reduced scale.
[0077] List of reference numerals
[0078] 1. 1a..1e Electric Machines
[0079] 2 rotor shafts
[0080] 3-laminated rotor core
[0081] 4 rotors
[0082] 5a and 5b (roller) bearings
[0083] 6a..6e front-end board
[0084] 7a..7e Rear end plate
[0085] 8a..8g stator housing
[0086] 9a..9e machine casing
[0087] 10a..10g stator
[0088] 11a..11e Stator laminated core
[0089] 12 stator laminations
[0090] 13 stator windings
[0091] 14a..14g stator assembly
[0092] 15a and 15b assembly bases
[0093] 16 cooling channels
[0094] 17 Stop section
[0095] 18 screws
[0096] 19c..19g spacer ring
[0097] 20 Stop Sections
[0098] 21 vehicles
[0099] 22 Transmission device
[0100] 23 half-shaft
[0101] 24 wheels
[0102] Stator axis
[0103] B1 and B2 end faces
Claims
1. A stator assembly (14a..14g) for an electric motor (1, 1a..1e), comprising: - Stator housing (8a..8g). - A stator (10a..10g), the stator being arranged in the stator housing (8a..8g) and having a stator lamination core (11a..11e), the stator lamination core having a plurality of stator laminations (12) axially stacked on top of each other, the stator lamination core (11a..11e) being assembled into the stator housing (8a..8g), Its features are, The stator lamination core (11a..11e) is assembled into the stator housing (8a..8g) only at the first mounting base (15a) in the region of the first end face (B1) of the stator lamination core (11a..11e) and at the second mounting base (15b) in the region of the second end face (B2) of the stator lamination core (11a..11e), and there is a free space between the first mounting base and the second mounting base. - The first mounting base (15a) is radially outward relative to the stator axis (A) of the stator (10a..10g) than the second mounting base (15b).
2. The stator device (14a..14g) according to claim 1, characterized in that, The stator laminations (12) are directly assembled into the stator housing (8a..8g) and have a greater radial extension in the region of the first end face (B1) than in the region of the second end face (B2).
3. The stator device (14a..14g) according to claim 1, characterized in that, - All of the stator laminations (12) have the same radial extension range. - In the region of the first end face (B1), the stator lamination core (11a..11e) has a spacer ring (19c..19g), the stator lamination (12) is assembled into the spacer ring and the spacer ring is assembled into the stator housing (8a..8g), and - In the region of the second end face (B2), the stator laminations (12) are directly assembled into the stator housing (8a..8g).
4. The stator device (14a..14g) according to claim 3, characterized in that, - The spacer ring (19c..19g) has a stop (20), and the end face stator laminations (12) are supported against the stop (20), and - The spacer ring (19c..19g) is threaded to the stator housing (8a..8g) in the axial direction.
5. The stator device (14a..14g) according to any one of the preceding claims, characterized in that, The stator housing (8a..8g) has a stop portion (17), and the second end face (B2) of the stator lamination core (11a..11e) is supported against the stop portion (17).
6. The stator device (14a..14g) according to any one of the preceding claims, characterized in that, The first mounting base (15a) and / or the second mounting base (15b) - It is cylindrical, or - It has a shape different from that of a cylinder.
7. The stator device (14a..14g) according to any one of the preceding claims, characterized in that, The assembly of the stator lamination core (11a..11e) and the stator housing (8a..8g) at the first mounting base (15a) and / or at the second mounting base (15b) is designed as a loose fit, transition fit, or interference fit.
8. The stator device (14a..14g) according to any one of the preceding claims, characterized in that, The stator housing (8a..8g) has cooling channels (16) for cooling medium.
9. The stator assembly (14a..14g) according to claim 8, wherein, The cooling channel (16) is defined by the stator housing (8a..8g) and the stator laminations (12) of the stator lamination core (11a..11e), wherein, when the spacer ring (19c..19g) according to claim 3 is present, the cooling channel (16) is additionally defined by the spacer ring (19c..19g).
10. The stator device (14a..14g) according to claim 8 or 9, characterized in that, The first mounting base (15a) and / or the second mounting base (15b) are liquid-tight.
11. The stator device (14a..14g) according to any one of the preceding claims, characterized in that, The spacer ring (19c..19g) has an integrally formed end plate (6e) with a bearing housing for the rotor shaft (2) of the motor (1, 1a..1e) or for the bearing (5a) of the rotor shaft (2).
12. An electric motor (1, 1a..1e) having a stator assembly (14a..14g) according to any one of the preceding claims.
13. A vehicle (21) having an electric motor (1, 1a...1e) according to claim 12, the electric motor being configured to drive the vehicle (21).
14. A method for manufacturing a stator assembly (14a.14g) for an electric motor (1, 1a...1e), comprising the following steps: - Provides a stator housing (8a..8g) and a stator (10a..10g), the stator having a stator lamination core (11a..11e), the stator lamination core having a plurality of stator laminations (12) axially stacked on top of each other, and - The stator lamination core (11a..11e) is inserted into the stator housing (8a..8g), wherein, - The stator lamination core (11a..11e) is assembled into the stator housing (8a..8g) only at the first mounting seat (15a) in the region of the first end face (B1) of the stator lamination core (11a..11e) and at the second mounting seat (15b) in the region of the second end face (B2) of the stator lamination core (11a..11e), and there is a free space between the first mounting seat (15a) and the second mounting seat (15b), and the first mounting seat (15a) is radially outward relative to the stator axis (A) of the stator (10a..10g) than the second mounting seat (15b).
15. The method according to claim 14, wherein, The stator laminations (12) are directly assembled into the stator housing (8a, 8b) and have a larger radial extension in the region of the first end face (B1) than in the region of the second end face (B2), wherein the radial extension is reduced in the region of the second end face (B2) and / or in the region of the gap by material removal.