Stator assembly and motor

Abstract

The invention discloses a stator assembly and a motor. The stator assembly comprises an end plate which is provided with a first through hole and is configured to be connected with a housing; the laminated stator core is provided with a second through hole extending along the axial direction of the laminated stator core, and the end plate is arranged at the end part of the laminated stator core along the axial direction; the pull rod extends in the axial direction, part of the pull rod is located in the first through hole, and part of the pull rod is located in the second through hole; and at least part of the insulation sleeve is located in the second through hole, the pull rod is sleeved with the insulation sleeve, and the insulation sleeve is used for insulating the pull rod and the laminated stator iron core. In this way, the problem that the performance of the laminated stator core and the stator assembly is reduced due to stress and insulation problems can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a stator assembly and an electric machine. BACKGROUND

[0002] The conventional lamination stator core and the shell are usually fixed by interference fit or welding, but the interference fit will cause the lamination stator core to bear certain mechanical stress, thereby affecting its performance, and the welding will cause the lamination stator core to crack or local insulation loss, thereby affecting its performance. Moreover, the tight fit between the conventional lamination stator core and the shell will make the stator lamination form a conductive loop through the shell, thereby affecting its performance. These problems are particularly prominent on the lamination stator core of amorphous material. SUMMARY

[0003] The present application provides a stator assembly and an electric machine to improve the problem of performance degradation of the lamination stator core and the stator assembly caused by stress and insulation problems.

[0004] To solve the above technical problems, the present application provides a stator assembly. The stator assembly comprises: an end plate provided with a first through hole and configured to be connected with a shell; a lamination stator core provided with a second through hole extending along an axial direction of the lamination stator core, the end plate being arranged at an end of the lamination stator core along the axial direction; a pull rod extending along the axial direction and partially located in the first through hole and partially located in the second through hole; and an insulation sleeve at least partially located in the second through hole and sleeved on the pull rod, the insulation sleeve being configured to insulate the pull rod from the lamination stator core.

[0005] In some embodiments, along the axial direction, a size of a portion of the insulation sleeve in the second through hole is smaller than a size of a portion of the pull rod in the second through hole, and the pull rod is arranged in a spaced manner from the lamination stator core.

[0006] In some embodiments, the insulation sleeve is partially arranged in the first through hole.

[0007] In some embodiments, the insulation sleeve comprises a boss portion and a columnar portion arranged along the axial direction, the insulation sleeve is provided with a third through hole, the pull rod is partially arranged in the third through hole, and the third through hole penetrates through the boss portion and the columnar portion; an outer diameter of the boss portion is greater than an outer diameter of the columnar portion, the boss portion abuts against a side of the end plate away from the lamination stator core, and the columnar portion is arranged in the first through hole and the second through hole.

[0008] In some embodiments, the stator assembly further comprises a locking member, an end portion of the pull rod extends to an outside of the side of the end plate away from the lamination stator core, and is connected with the locking member.

[0009] In some embodiments, the insulating sleeve comprises a boss portion and a column portion arranged along the axial direction, the boss portion being arranged between the end plate and the locking member.

[0010] In some embodiments, a rod segment of the pull rod located outside the side of the end plate away from the lamination stator core is provided with a thread, and the locking member comprises a nut engaged with the thread.

[0011] In some embodiments, the stator assembly comprises two end plates, two insulating sleeves and two locking members, the end plates being respectively arranged at two ends of the lamination stator core along the axial direction, the insulating sleeves being respectively sleeved on two ends of the pull rod, and the locking members being respectively connected with the two ends of the pull rod.

[0012] In some embodiments, the lamination stator core comprises an amorphous lamination stator core.

[0013] In some embodiments, the stator assembly further comprises a housing sleeved outside the end plate and the lamination stator core and connected with the end plate, wherein the end plate and the lamination stator core are coaxially arranged, and the outer diameter of the end plate is greater than the outer diameter of the lamination stator core, so that the housing and the lamination stator core are arranged in a spaced manner.

[0014] In some embodiments, the stator assembly further comprises a pressure tooth plate arranged along the axial direction on the side of the end plate close to the lamination stator core, and the outer edge of the pressure tooth plate is arranged between the end plate and the lamination stator core.

[0015] To solve the above technical problems, the application provides an electric machine. The electric machine comprises the above stator assembly, the lamination stator core is provided with a center through hole, and a rotor assembly is at least partially arranged in the center through hole.

[0016] Different from the prior art: the stator assembly provided by the application comprises an end plate, a lamination stator core, a pull rod and an insulating sleeve, wherein the end plate is provided with a first through hole; the lamination stator core is provided with a second through hole extending along the axial direction of the lamination stator core, and the end plate is arranged at the end of the lamination stator core along the axial direction; the pull rod extends along the axial direction and is partially located in the first through hole and partially located in the second through hole; and the insulating sleeve is at least partially located in the second through hole and is sleeved on the pull rod, and the insulating sleeve is used to insulate the pull rod from the lamination stator core. In this way, on the one hand, the end plate is arranged at the end of the lamination stator core, and the pull rod is used to pass through the end plate and the lamination stator core to connect the end plate and the lamination stator core, so that the coaxiality of the components can be improved, and the end plate can bear at least part of the stress from the shell, thereby improving the problems of damage to the lamination stator core and damage to the insulation due to stress; on the other hand, the pull rod is used to fasten the lamination stator core, without the shell, and the insulating sleeve is sleeved on the pull rod to insulate the pull rod from the lamination stator core, thereby solving the problem of conduction between the stator laminations in the lamination stator core through the pull rod. Therefore, the application can improve the problem of performance degradation of the lamination stator core and the stator assembly due to stress and insulation problems. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor. Figure 1 is a structural schematic diagram of an embodiment of the lamination stator core assembly of the application; Figure 2 is a structural schematic diagram of the lamination stator core of the embodiment; Figure 1 Figure 3 is an enlarged structural schematic diagram of structure A in the embodiment; Figure 2 Figure 4 is a structural schematic diagram of an embodiment of the insulating sleeve of the application; Figure 5 is a structural schematic diagram of an embodiment of the pull rod of the application. DETAILED DESCRIPTION

[0018] ​​The application will be described in further detail below with reference to the drawings and embodiments. It is particularly pointed out that the following embodiments are only for illustrating the application, but not for limiting the scope of the application. Similarly, the following embodiments are only some embodiments of the application, but not all embodiments of the application, and all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0019] In the description of the embodiments of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0020] In the embodiments of the application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is less than that of the second feature.

[0021] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the application. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0022] In some embodiments, as shown in Figures 1 to 3 , the structure of the laminated stator core assembly of an embodiment of the application is shown in Figure 1 , the structure of the laminated stator core of an embodiment of the application is shown in Figure 2 , the structure of the laminated stator core of an embodiment of the application is shown in Figure 1 , the structure of the laminated stator core of an embodiment of the application is shown in Figure 3 , the structure of the laminated stator core of an embodiment of the application is shown in Figure 2The structure of the stator assembly 10 in the embodiment is shown in the enlarged view of structure A. The stator assembly 10 in the embodiment includes an end plate 201, a lamination stator core 203, a tie rod 204, and an insulating sleeve 206. The end plate 201 is provided with a first through hole (not labeled in the figure) and is configured to be connected to the housing 100. The lamination stator core 203 is provided with a second through hole 207 extending along the axial direction z of the lamination stator core 203, and the end plate 201 is arranged at the end of the lamination stator core 203 along the axial direction z. The tie rod 204 extends along the axial direction z and is partially arranged in the first through hole and partially arranged in the second through hole 207. The insulating sleeve 206 is at least partially arranged in the second through hole 207 and is sleeved on the tie rod 204. The insulating sleeve 206 is configured to insulate the tie rod 204 from the lamination stator core 203.

[0023] The lamination stator core 203 is formed by stacking a plurality of stator laminations along the axial direction z. After the core material is subjected to surface insulation treatment, the stator laminations (core laminations) are cut by stamping, laser cutting, or wire cutting, and then are assembled by stacking to form the lamination stator core 203. The stator core is formed by stacking the stator laminations, thereby obtaining the lamination stator core 203. The purpose is to divide the eddy current path by using inter-lamination insulation to limit the eddy current within a single stator lamination, thereby suppressing large-scale eddy current caused by alternating magnetic field and reducing the eddy current loss of the lamination stator core 203.

[0024] The insulating sleeve 206 is sleeved on the tie rod 204, which means that at least part of the insulating sleeve 206 is sleeved on at least part of the tie rod 204 to achieve insulation between the tie rod 204 and the lamination stator core 203.

[0025] In the embodiment, on the one hand, the end plate 201 is arranged at the end of the lamination stator core 203, and the tie rod 204 is arranged through the end plate 201 and the lamination stator core 203 to connect the end plate 201 and the lamination stator core 203 by the tie rod 204, so that the end plate 201 can bear at least part of the stress from the housing 100, thereby reducing the problems of damage to the lamination stator core 203 and damage to the insulation caused by stress. On the other hand, the lamination stator core 203 is fastened by the tie rod 204 without the housing, and the tie rod 204 is insulated from the lamination stator core 203 by the insulating sleeve 206 sleeved on the tie rod 204, thereby solving the problem of conduction between the stator laminations in the lamination stator core 203 through the tie rod 204. Therefore, the embodiment can improve the problem of performance degradation of the lamination stator core 203 caused by stress and insulation problems.

[0026] Further, the tie rod 204 in the embodiment can improve the coaxiality of the end plate 201, the lamination stator core 203, and the insulating sleeve 206. The end plate 201 is used to press the lamination stator core 203 to reduce the inter-lamination gap and reduce the volume of the lamination stator core 203.

[0027] In some embodiments, the end plate 201 may be made of materials such as carbon steel or stainless steel.

[0028] The insulating sleeve 206 is non-conductive and can be made of non-conductive non-metallic insulating material, without any specific limitation.

[0029] In some embodiments, such as Figure 3 As shown, along the axial direction z, the size of the portion of the insulating sleeve 206 inside the second through hole 207 is smaller than the size of the portion of the pull rod 204 inside the second through hole 207, and the pull rod 204 is spaced apart from the laminated stator core 203.

[0030] The insulating sleeve 206 is only fitted over a portion of the pull rod 204. Because the insulating sleeve 206 has a certain thickness, the portion of the pull rod 204 within the second through hole 207 that is not covered by the insulating sleeve 206 is spaced apart from the inner wall of the second through hole 207, i.e., spaced apart from the laminated stator core 203. This achieves insulation between the pull rod 204 and the laminated stator core 203. Furthermore, this method saves insulation material and reduces weight.

[0031] In some embodiments, the insulating sleeve 206 may also cover the entire inner wall of the second through hole 207 to increase the stability of the pull rod 204 within the second through hole 207.

[0032] In some embodiments, such as Figure 3 As shown, the insulating sleeve 206 is partially disposed within the first through hole.

[0033] In this embodiment, the insulating sleeve 206 not only insulates the pull rod 204 from the laminated stator core 203, but also insulates the pull rod 204 from the end plate 201, which improves the problem of the laminated stator core 203 being conductive to the pull rod 204 through the end plate 201. Furthermore, it facilitates the assembly of the pull rod 204 and the insulating sleeve 206 on the side of the end plate 201 away from the laminated stator core 203 after the end plate 201 is placed at the end of the laminated stator core 203, simplifying assembly and improving assembly efficiency and accuracy.

[0034] The insulating sleeve 206 is located at one end of the second through hole 207 near the end plate 201.

[0035] In some embodiments, different insulating elements may be provided in the first through hole and the second through hole 207 to respectively achieve insulation between the tie rod 204 and the end plate 201 and between the tie rod 204 and the laminated stator core 203.

[0036] In some embodiments, such as Figure 3 and Figure 4As shown, the insulating sleeve 206 includes a boss portion 216 and a column portion 226 arranged along the axial direction z, the insulating sleeve 206 is provided with a third through hole 236, the pull rod 204 is partially arranged in the third through hole 236, and the third through hole 236 penetrates the boss portion 216 and the column portion 226; the boss portion 216 has an outer diameter greater than that of the column portion 226, the boss portion 216 abuts against the side of the end plate 201 away from the lamination stator core 203, and the column portion 226 is arranged in the first through hole and the second through hole 207.

[0037] The column portion 226 of the insulating sleeve 206 is used to realize insulation between the pull rod 204 and the end plate 201 and between the pull rod 204 and the lamination stator core 203; the boss portion 216 of the insulating sleeve 206 is used to abut against the side of the end plate 201 away from the lamination stator core 203, so as to improve or avoid movement of the insulating sleeve 206 along the axial direction z in the first through hole and the second through hole 207, thereby improving insulation performance.

[0038] In some embodiments, the boss portion 216 and the column portion 226 are integrally arranged, so that the boss portion 216 and the column portion 226 form an integral whole that cannot be disassembled without violent intervention, which is also referred to as a “one-piece integral whole”, and can improve structural strength and insulation reliability of the insulating sleeve 206.

[0039] In some embodiments, as shown in Figure 3 and Figure 2 The stator assembly 10 further includes a locking member 205, an end portion of the pull rod 204 extends to the side of the end plate 201 away from the lamination stator core 203 and is connected with the locking member 205. In this embodiment, the pull rod 204 is locked with the end plate 201 by the locking member 205, which can improve structural stability of the stator assembly 10 and can concentrate more stress on the lamination stator core 203 to the end plate 201.

[0040] In some embodiments, the insulating sleeve 206 includes a boss portion 216 and a column portion 226 arranged along the axial direction z, the boss portion 216 is arranged between the end plate 201 and the locking member 205. The column portion 226 of the insulating sleeve 206 is used to realize insulation between the pull rod 204 and the end plate 201 and between the pull rod 204 and the lamination stator core 203; the boss portion 216 of the insulating sleeve 206 is locked between the end plate 201 and the locking member 205, so as to improve or avoid movement of the insulating sleeve 206 along the axial direction z in the first through hole and the second through hole 207, thereby improving insulation performance.

[0041] In some embodiments, as shown in Figure 3 and Figure 5As shown, the rod segment of the pull rod 204 located outside the end plate 201 away from the laminated stator core 203 is provided with a thread, and the locking member 205 includes a nut (not marked in the figure) which is in engagement with the thread. Through the threaded connection mode, not only the connection stability can be improved, but also the detachable connection between the pull rod 204 and the locking member 205 can be realized.

[0042] In some embodiments, the connection between the pull rod 204 and the end plate 201 can also be realized through welding or other ways.

[0043] In some embodiments, as shown in Figure 2 The stator assembly 10 includes two end plates 201, two insulation sleeves 206 and two locking members 205, the end plates 201 are respectively located at the two ends of the laminated stator core 203 along the axial direction z, the two insulation sleeves 206 are respectively sleeved on the two ends of the pull rod 204, and the two locking members 205 are respectively connected with the two ends of the pull rod 204. In this embodiment, the laminated stator core 203, the end plate 201 and the insulation sleeve 206 are fastened from the two ends of the locking member 205, which can improve the structural stability, and the two ends of the laminated stator core 203 are both provided with the end plate 201, which can improve the stress transfer effect.

[0044] In some embodiments, the laminated stator core 203 includes an amorphous laminated stator core.

[0045] The amorphous stator punching sheet of the amorphous laminated stator core can be made of amorphous or nanocrystalline material, and there is an insulating paint film between the sheets, which is made by stamping or wire cutting, and the amorphous laminated stator core can be whole or split.

[0046] Since the amorphous material is sensitive to electromagnetic performance such as loss and mechanical stress and inter-sheet insulation performance, the above-mentioned scheme of the present application has obvious improvement effect on the performance decline problem of the amorphous laminated stator core caused by stress and insulation.

[0047] In other embodiments, the stator laminations in the laminated stator core 203 can also include silicon steel laminations or be combined with amorphous stator punching sheets and silicon steel laminations.

[0048] In some embodiments, as shown in Figure 1 and Figure 2 The stator assembly further includes: a shell 100 which is sleeved outside the end plate 201 and the laminated stator core 203 and is connected with the end plate 201; wherein the end plate 201 and the laminated stator core 203 are coaxially arranged, and the outer diameter of the end plate 201 is greater than the outer diameter of the laminated stator core 203, so that the shell 100 is arranged in a spaced manner with the laminated stator core 203.

[0049] Since the outer diameter of the end plate 201 is larger than the outer diameter of the lamination stator core 203, there is a certain gap between the lamination stator core 203 and the casing 100, so that the lamination stator core 203 is not in contact with the casing 100 in the radial direction, so that the stator lamination sheets of the lamination stator core 203 will not be short-circuited through the casing 100, and the influence of the back short circuit on the performance can be improved.

[0050] Further, since the outer diameter of the end plate 201 is larger than the outer diameter of the lamination stator core 203, the end plate 201 can be interference fit with the casing 100, and when the two are fit, the radial force is mainly loaded on the end plate 201, and the lamination stator core 203 is not subjected to or has small radial force, thereby reducing the influence of stress on the performance of the lamination stator core 203.

[0051] In some embodiments, the end plate 201 and the casing 100 can also or further be connected in cooperation by spot welding, keyway, locking piece and other ways.

[0052] In some embodiments, as shown in Figure 1 The stator assembly 10 further includes a pressure tooth plate 202 arranged in the axial direction z on the side of the end plate 201 close to the lamination stator core 203, and the outer edge of the pressure tooth plate 202 is arranged between the end plate 201 and the lamination stator core 203. In this embodiment, the pressure tooth plate 202 improves the protection and positioning of the lamination stator core 203.

[0053] In some embodiments, the pressure tooth plate 202 can be made of non-magnetic stainless steel or other materials. Since the single stator lamination is very thin and easy to warp, the pressure tooth plate 202 can be used to fix the lamination stator core 203 and other components.

[0054] The multi-layer stator lamination, the pressure tooth plate 202, the end plate 201 and other components are positioned by a tool, and then pre-tightened in the axial direction z by a press machine to ensure the stacking factor of the lamination stator core 203, and then the insulating sleeve 206 is installed, the pull rod 204 is put on, and the locking piece 205 is used for axial z fastening.

[0055] The insulating sleeve 206 is placed between the pull rod 204 and the end plate 201, the pressure tooth plate 202 and the lamination stator core 203, which can not only insulate the pull rod 204 from these components, but also limit the tangential and radial positions of these components, thereby ensuring the coaxiality of each component.

[0056] In some embodiments, the end plate 201, the lamination stator core 203, the pressure tooth plate 202 and the insulating sleeve 206 are annularly arranged. The end plate 201 is provided with a plurality of first through holes arranged in the circumferential direction of the lamination stator core 203, the lamination stator core 203 is provided with a plurality of second through holes 207 corresponding to the first through holes, the stator assembly includes a plurality of pull rods 204, and each pull rod 204 is provided with corresponding insulating sleeves 206 at both ends.

[0057] In some embodiments, such as Figure 1 As shown, the motor (not shown) includes a stator assembly 10 and a rotor assembly (not shown). The laminated stator core 203 has a central through hole 209; the rotor assembly is at least partially disposed within the central through hole 209. Of course, the motor also includes components such as windings, which will not be described in detail here.

[0058] The stator assembly provided in this application includes: an end plate, a laminated stator core, a tie rod, and an insulating sleeve. The end plate has a first through hole; the laminated stator core has a second through hole extending axially along the laminations of the laminations of the stator core, and the end plate is axially disposed at the end of the laminations of the stator core; the tie rod extends axially and is partially located within the first through hole and partially within the second through hole; the insulating sleeve is at least partially located within the second through hole and is sleeved over the tie rod, and the insulating sleeve is used to insulate the tie rod from the laminations of the stator core. In this way, on the one hand, by setting end plates at the ends of the laminated stator core and using tie rods to pass through the end plates and the laminated stator core respectively, the connection between the end plates and the laminated stator core is achieved through the tie rods. This improves the coaxiality of the components and allows the end plates to bear at least part of the stress from the housing, thereby reducing problems such as damage to the laminated stator core and insulation failure due to stress. On the other hand, the laminated stator core is fastened by the tie rods without passing through the housing, and the tie rods are insulated from the laminated stator core by using an insulating sleeve, which solves the problem of conduction between the stator laminations in the laminated stator core through the tie rods. Therefore, this application can improve the problem of performance degradation of the laminated stator core and stator assembly caused by stress and insulation problems.

[0059] Furthermore, since the outer diameter of the end plate is larger than that of the laminated stator core, the end plate can be interference-fitted with the housing. When the two are fitted together, the radial force is mainly applied to the end plate, and the laminated stator core is not subjected to radial force, thereby reducing the influence of stress on the performance of the laminated stator core.

[0060] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A stator assembly characterized by, The stator assembly comprises: an end plate provided with a first through hole and configured to be connected with the housing; a lamination stator core provided with a second through hole extending along an axial direction of the lamination stator core, the end plate being arranged at an end of the lamination stator core along the axial direction; a pull rod extending along the axial direction and partially located in the first through hole and partially located in the second through hole; an insulating sleeve at least partially located in the second through hole and sleeved on the pull rod, the insulating sleeve being configured to insulate the pull rod from the lamination stator core.

2. The stator assembly of claim 1, wherein, Along the axial direction, a dimension of the portion of the insulating sleeve located in the second through hole is smaller than a dimension of the portion of the pull rod located in the second through hole, and the pull rod is arranged in a spaced manner from the lamination stator core.

3. The stator assembly of claim 1, wherein, The insulating sleeve is partially arranged in the first through hole.

4. The stator assembly of claim 3, wherein, The insulating sleeve comprises a boss portion and a column portion arranged along the axial direction, the insulating sleeve is provided with a third through hole, the pull rod is partially arranged in the third through hole, and the third through hole penetrates through the boss portion and the column portion. An outer diameter of the boss portion is greater than an outer diameter of the column portion, the boss portion abuts against a side of the end plate away from the lamination stator core, and the column portion is arranged in the first through hole and the second through hole.

5. The stator assembly of claim 1, wherein, The stator assembly further comprises a locking member, an end portion of the pull rod extends out of the side of the end plate away from the lamination stator core and is connected with the locking member.

6. The stator assembly of claim 5, wherein, The insulating sleeve comprises a boss portion and a column portion arranged along the axial direction, the boss portion is arranged between the end plate and the locking member.

7. The stator assembly of claim 6, wherein, A rod segment of the pull rod located out of the side of the end plate away from the lamination stator core is provided with a thread, and the locking member comprises a nut engaged with the thread.

8. The stator assembly of claim 5, wherein, The stator assembly comprises two end plates, two insulating sleeves and two locking members, the end plates are respectively arranged at two ends of the lamination stator core along the axial direction, the two insulating sleeves are respectively sleeved on two ends of the pull rod, and the two locking members are respectively connected with the two ends of the pull rod.

9. The stator assembly of claim 1, wherein, The lamination stator core comprises an amorphous lamination stator core.

10. A stator assembly according to any one of claims 1 to 9, characterised in that, The stator assembly further comprises: a housing sleeved on an outer side of the end plate and the lamination stator core and connected with the end plate; wherein the end plate and the lamination stator core are coaxially arranged, and an outer diameter of the end plate is greater than an outer diameter of the lamination stator core, so that the housing is arranged in a spaced manner from the lamination stator core.

11. A stator assembly according to any one of claims 1 to 9, characterised in that, The stator assembly further comprises: a pressure tooth plate arranged on a side of the end plate close to the lamination stator core along the axial direction, and an outer edge of the pressure tooth plate is arranged between the end plate and the lamination stator core.

12. An electric machine characterized by The motor comprises: the stator assembly of any one of claims 1 to 11, the lamination stator core being provided with a center through hole; a rotor assembly at least partially arranged in the center through hole.

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