Motor and vehicle

Abstract

Provided are a motor and a vehicle. The motor comprises a first housing, an inner rotor, an inner stator, an outer stator, an outer rotor, a rotor shaft, and a stator support frame. The rotor shaft, the inner rotor, the inner stator, the outer stator, and the outer rotor are coaxial and are sequentially arranged outward in the radial direction of the rotor shaft; the inner rotor is coaxially connected to the rotor shaft; the first housing comprises an end plate; the stator support frame is located on the side of the inner stator and the outer stator facing away from the end plate; the inner stator and the outer stator are both connected between the end plate and the stator support frame by means of fasteners; and the rotor shaft is rotatably mounted on the end plate and the stator support frame.

Description

Electric machine and vehicle

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 2024215758444, filed on July 4, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of vehicles, in particular to an electric machine and a vehicle. BACKGROUND

[0004] A range-extending or hybrid vehicle needs to adopt a dual-motor system. In order to reduce the axial size of the dual-motor system, the stator and rotor of the two motors are usually arranged in a radial direction in a nested manner, that is, the stator and rotor of one motor are nested on the stator and rotor of the other motor, and the two stators are fixed on the motor housing through bolts. In the related art, in order to facilitate the protrusion of the outer rotor outside the motor housing, an end plate is usually arranged at one end of the motor housing, the two stators are connected to the end plate through bolts, and the end of the stator away from the end plate is not constrained. At this time, there are defects that the connection strength of the bolts and the end plate is high, and the support reliability of the housing to the two stators is poor. SUMMARY

[0005] The present disclosure aims to at least partially solve one of the technical problems in the related art.

[0006] To this end, an embodiment of the present disclosure provides an electric machine, which has the advantage of high support reliability of the inner stator and the outer stator.

[0007] The electric machine of the embodiment of the present disclosure comprises a first housing, an inner rotor, an inner stator, an outer stator, an outer rotor, a rotor shaft, and a stator support frame, the rotor shaft, the inner rotor, the inner stator, the outer stator, and the outer rotor are coaxial and arranged in the radial direction of the rotor shaft in sequence from inside to outside, the inner rotor is coaxially connected to the rotor shaft;

[0008] The first housing comprises an end plate, the stator support frame is located on the side of the inner stator and the outer stator away from the end plate, the inner stator and the outer stator are connected between the end plate and the stator support frame through fasteners, and the rotor shaft is rotatably installed on the end plate and the stator support frame.

[0009] The motor according to the embodiment of the present disclosure, the outer rotor and the outer stator constitute an outer motor, the rotor shaft, the inner rotor and the inner stator constitute an inner motor, and the outer motor and the inner motor realize the dual-motor use requirement of the extended-range and hybrid power driving vehicle. Wherein, the first end of the inner stator and the outer stator is connected with the end plate, and the second end of the inner stator and the outer stator is connected with the stator support frame at the same time, and the stator support frame is pivotally connected with the rotor shaft, at this time, the first shell supports the second end of the inner stator and the outer stator through the rotor shaft and the stator support frame, thereby effectively avoiding the bias of the inner stator and the outer stator, and the support reliability of the motor to the inner stator and the outer stator is high.

[0010] In some embodiments, the motor further comprises a rotor hub located in the first shell and coaxially connected with the outer rotor, at least part of the rotor hub is located on the side of the stator support frame away from the end plate, and the rotor hub is used to be connected with the crankshaft of the engine or the flange drive of the range extender.

[0011] In some embodiments, the motor further comprises a first bearing, the end plate is provided with a first stepped hole, at least part of the rotor shaft passes through the first stepped hole and is exposed outside the first shell, and the first bearing is fitted between the inner wall surface of the first stepped hole and the outer peripheral surface of the rotor shaft.

[0012] The motor further comprises a second bearing, the stator support frame is provided with a second stepped hole, and the second bearing is fitted between the inner wall surface of the second stepped hole and the outer peripheral surface of the rotor shaft.

[0013] In some embodiments, the motor further comprises a third bearing, the rotor hub is provided with a third stepped hole, the stator support frame comprises a support portion located in the third stepped hole, and the third bearing is fitted between the inner wall surface of the third stepped hole and the outer peripheral surface of the support portion.

[0014] In some embodiments, the outer stator is provided with a plurality of first through holes extending along the axial direction of the outer stator, the inner stator is provided with a plurality of second through holes extending along the axial direction of the inner stator, any one of the first through holes and any one of the second through holes are arranged at intervals along the circumferential direction of the inner rotor, the outer stator is connected with the end plate and the stator support frame through the first fasteners passing through the first through holes, and the inner stator is connected with the end plate and the stator support frame through the second fasteners passing through the second through holes.

[0015] In some embodiments, the outer stator includes an outer stator yoke, the inner stator includes an inner stator yoke, an inner circumferential surface of the outer stator yoke is provided with a plurality of first connecting portions extending towards the inner stator yoke, an outer circumferential surface of the inner stator yoke is provided with a plurality of second connecting portions extending towards the outer stator yoke, the plurality of first connecting portions and the plurality of second connecting portions are alternately and spacedly arranged along a circumferential direction of the inner rotor, each of the first connecting portions is provided with one of the first through holes, and each of the second connecting portions is provided with one of the second through holes.

[0016] In some embodiments, an inner circumferential surface of the outer stator yoke is provided with first grooves for accommodating at least part of the second connecting portions, and an outer circumferential surface of the inner stator yoke is provided with second grooves for accommodating at least part of the first connecting portions.

[0017] In some embodiments, the end plate is provided with a plurality of first threaded holes and a plurality of second threaded holes on a surface thereof facing the inner stator;

[0018] The stator support frame is provided with a plurality of third through holes corresponding to the first through holes and a plurality of fourth through holes corresponding to the second through holes;

[0019] The first fastener and the second fastener are both threaded members, the first fastener passes through the third through hole and the first through hole and is threadedly engaged with the first threaded hole, and the second fastener passes through the fourth through hole and the second through hole and is threadedly engaged with the second threaded hole.

[0020] In some embodiments, the motor further includes:

[0021] A second housing, which is integrally formed with the first housing, and an inner cavity of the second housing is in communication with the inner cavity of the first housing through the first stepped hole;

[0022] An input shaft, which is rotatably installed in the second housing and coaxially connected with the rotor shaft;

[0023] An output shaft and a gear transmission mechanism, the output shaft is rotatably installed on the second housing, and the output shaft is drivingly connected with the input shaft through the gear transmission mechanism.

[0024] In some embodiments, the rotor shaft, the inner rotor and the inner stator constitute a three-phase asynchronous motor; and / or

[0025] The outer rotor and the outer stator constitute a permanent magnet synchronous motor.

[0026] Embodiments of the present disclosure also propose a vehicle.

[0027] The vehicle according to embodiments of the present disclosure includes the motor according to any of the above embodiments.

[0028] The technical advantages of the vehicle according to the embodiments of the present disclosure are the same as those of the motor according to the above-described embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0029] FIG. 1 is a cross-sectional view of a motor according to an embodiment of the present disclosure.

[0030] FIG. 2 is another cross-sectional view of a motor according to an embodiment of the present disclosure.

[0031] Reference numerals: 1, first housing; 11, end plate; 111, threaded hole; 2, inner rotor; 3, inner stator; 31, inner stator yoke; 311, first connecting portion; 312, first slot; 313, first through hole; 4, outer stator; 41, outer stator yoke; 411, second connecting portion; 412, second slot; 413, second through hole; 5, outer rotor; 6, rotor shaft; 7, stator support frame; 71, support portion; 8, rotor hub; 9, first bearing; 10, second bearing; 110, third bearing; 120, second housing; 130, input shaft; 140, gear transmission mechanism; 150, engine; 160, rotor balance plate. DETAILED DESCRIPTION

[0032] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0033] A motor according to an embodiment of the present disclosure is described below with reference to FIGS. 1 and 2.

[0034] The motor according to an embodiment of the present disclosure includes a first housing 1, an inner rotor 2, an inner stator 3, an outer stator 4, an outer rotor 5, a rotor shaft 6, and a stator support frame 7. The rotor shaft 6, the inner rotor 2, the inner stator 3, the outer stator 4, and the outer rotor 5 are coaxially arranged in sequence outward in a radial direction of the rotor shaft 6, and the inner rotor 2 is connected coaxially with the rotor shaft 6. The first housing 1 includes an end plate 11, and the stator support frame 7 is located on a side of the inner stator 3 and the outer stator 4 away from the end plate 11. The inner stator 3 and the outer stator 4 are connected between the end plate 11 and the stator support frame 7 by fasteners, and the rotor shaft 6 is rotatably installed on the end plate 11 and the stator support frame 7.

[0035] The motor according to the embodiment of the present disclosure, the outer rotor 5 and the outer stator 4 constitute an outer motor, the rotor shaft 6, the inner rotor 2 and the inner stator 3 constitute an inner motor, and the outer motor and the inner motor realize the dual-motor use requirement of the extended-range and hybrid power driving vehicle. Wherein, the first end of the inner stator 3 and the outer stator 4 is connected with the end plate 11, and the second end of the inner stator 3 and the outer stator 4 is connected with the stator support frame 7, and the stator support frame 7 is pivotally connected with the rotor shaft 6, at this time, the first shell 1 supports the second end of the inner stator 3 and the outer stator 4 through the rotor shaft 6 and the stator support frame 7, thereby effectively avoiding the inner stator 3 and the outer stator 4 from being biased, and the support reliability of the motor to the inner stator 3 and the outer stator 4 is high.

[0036] It should be noted that the inner stator 3 and the outer stator 4 are spaced apart along the radial direction of the inner rotor 2, thereby avoiding electromagnetic interference between the two, and ensuring the working reliability of the inner motor and the outer motor. The inner rotor 2 is connected to the rotor shaft 6 in a key connection manner. The outer rotor 5 is coaxially fixed with rotor balance plates 160 on both axial sides thereof, so as to ensure the dynamic performance and stability of the outer rotor 5. The rotor laminations constituting the inner rotor 2, the stator laminations constituting the inner stator yoke 31, the stator laminations constituting the outer stator yoke 41 and the rotor laminations constituting the outer rotor 5 are all punched from the same set of lamination dies, at this time, the waste rate of raw materials is low, and the utilization rate of raw materials is high.

[0037] In some embodiments, as shown in FIG. 1, the motor further comprises a rotor hub 8, the rotor hub 8 is located in the first shell 1 and is coaxially connected with the outer rotor 5, at least part of the rotor hub 8 is located on the side of the stator support frame 7 away from the end plate 11, and is used to be connected with the crankshaft of the engine 150 or the flange drive of the range extender.

[0038] At this time, the first shell 1 can be provided with an opening at the end away from the end plate 11, and the rotor hub 8 can shield the outer rotor 5, the outer stator 4, the inner stator 3 and the inner rotor 2 after being connected with the outer rotor 5, and the part of the rotor hub 8 located on the side of the stator support frame 7 away from the end plate 11 is connected with the crankshaft of the engine 150 or the flange drive of the range extender, so as to realize the start-stop of the engine 150 or the range extender, without the need for a support bearing, thereby effectively reducing the manufacturing cost of the motor.

[0039] Specifically, the end surface of the first shell 1 away from the end plate 11 is provided with a mounting hole for being connected with the shell of the engine 150 or the range extender, so as to ensure that the shell of the engine 150 or the range extender is fixedly connected with the first shell 1. The rotor hub 8 is provided with an assembly hole with an opening facing the end plate 11, and the outer rotor 5 is fitted in the assembly hole in an interference fit.

[0040] In some embodiments, as shown in FIG. 1, the motor further comprises a first bearing 9, the end plate 11 is provided with a first stepped hole, at least part of the rotor shaft 6 passes through the first stepped hole and is exposed outside the first housing 1, and the first bearing 9 is fitted between the inner wall surface of the first stepped hole and the outer circumferential surface of the rotor shaft 6. The motor further comprises a second bearing 10, the stator support frame 7 is provided with a second stepped hole, and the second bearing 10 is fitted between the inner wall surface of the second stepped hole and the outer circumferential surface of the rotor shaft 6. The motor further comprises a third bearing 110, the rotor hub 8 is provided with a third stepped hole, and the stator support frame 7 comprises a support portion 71 located in the third stepped hole, and the third bearing 110 is fitted between the inner wall surface of the third stepped hole and the outer circumferential surface of the support portion 71.

[0041] That is, the rotor shaft 6 is rotatably mounted on the end plate 11 and the stator support frame 7 through the first bearing 9 and the second bearing 10 respectively, thereby ensuring the rotation accuracy of the inner rotor 2 and the rotor shaft 6 relative to the inner stator 3 and the first housing 1. On this basis, the rotor hub 8 is rotatably mounted on the stator support frame 7 through the third bearing 110, thereby ensuring the coaxiality of each of the outer rotor 5 and the inner rotor 2 with each of the inner stator 3 and the outer stator 4. On the basis that the rotor hub 8 and the first housing 1 are connected to the crankshaft and the housing of the engine 150 respectively, the stator support frame 7 and the end plate 11 better realize reliable support of the two ends of the inner stator 3 and the outer stator 4, and the operation reliability of the motor is higher.

[0042] In some embodiments, as shown in FIG. 1 and FIG. 2, the outer stator 4 is provided with a plurality of first through holes 313 extending along the axial direction of the outer stator 4, the inner stator 3 is provided with a plurality of second through holes 413 extending along the axial direction of the inner stator 3, any one of the first through holes 313 and any one of the second through holes 413 are arranged in the circumferential direction of the inner rotor 2, the outer stator 4 is connected to the end plate 11 and the stator support frame 7 through first fasteners passing through the first through holes 313, and the inner stator 3 is connected to the end plate 11 and the stator support frame 7 through second fasteners passing through the second through holes 413.

[0043] At this time, the part of the outer stator 4 provided with the first through hole 313 and the part of the inner stator 3 provided with the second through hole 413 are opposite in the circumferential direction of the rotor shaft 6 rather than arranged in the radial direction of the rotor shaft 6, thereby effectively reducing the radial dimension occupied by the inner stator 3 and the outer stator 4, the inner stator 3 and the outer stator 4 occupy less internal space of the first housing 1, and the volume and weight of the motor are lighter.

[0044] Specifically, the number of the first through holes 313 and the second through holes 413 is equal, and the plurality of first through holes 313 and the plurality of second through holes 413 are alternately and spacedly arranged in the circumferential direction of the inner rotor 2.

[0045] In some embodiments, as shown in FIG. 2, the outer stator 4 comprises an outer stator yoke 41, and the inner stator 3 comprises an inner stator yoke 31. The inner circumferential surface of the outer stator yoke 41 is provided with a plurality of first connecting portions 311 extending towards the inner stator yoke 31. The outer circumferential surface of the inner stator yoke 31 is provided with a plurality of second connecting portions 411 extending towards the outer stator yoke 41. The plurality of first connecting portions 311 and the plurality of second connecting portions 411 are alternately and spacedly arranged along the circumference of the inner rotor 2. Each first connecting portion 311 is provided with a first through hole 313. Each second connecting portion 411 is provided with a second through hole 413.

[0046] In this way, the first through holes 313 and the second through holes 413 are spacedly arranged along the circumference of the inner rotor 2, and the inner stator yoke 31 and the outer stator yoke 41 do not need to be thickened as a whole, thereby further reducing the space occupied by the inner stator 3 and the outer stator 4, and further reducing the total weight of the motor.

[0047] In some embodiments, as shown in FIG. 2, the inner circumferential surface of the outer stator yoke 41 is provided with at least part of the second connecting portions 411 fitting into the first slots 312. The outer circumferential surface of the inner stator yoke 31 is provided with at least part of the first connecting portions 311 fitting into the second slots 412.

[0048] In this way, the distance between the inner circumferential surface of the inner stator yoke 31 and the outer circumferential surface of the outer stator yoke 41 is further reduced, thereby further reducing the radial dimension of the motor, making the structure of the motor more compact, smaller in size and stronger in weight.

[0049] Specifically, the cross-sectional shape of the first connecting portions 311 and the second connecting portions 411 is generally semicircular, and the first slots 312 and the second slots 412 are generally semicircular slots.

[0050] In some embodiments, the surface of the end plate 11 facing the inner stator 3 is provided with a plurality of first threaded holes 111 and a plurality of second threaded holes 111. The stator support frame 7 is provided with a plurality of third through holes corresponding to the first through holes 313 and a plurality of fourth through holes corresponding to the second through holes 413. The first fastener and the second fastener are both threaded fasteners. The first fastener passes through the third through hole and the first through hole 313 and is screwed into the first threaded hole 111. The second fastener passes through the fourth through hole and the second through hole 413 and is screwed into the second threaded hole 111.

[0051] In this way, the connection of each of the inner stator 3 and the outer stator 4 with the stator support frame 7 and the end plate 11 is convenient and reliable, and the motor assembly efficiency is high.

[0052] Specifically, the first fastener and the second fastener are both bolts. The end plate 11 is thickened at the first threaded hole 111 and the second threaded hole 111 to effectively ensure the connection strength of the bolts and the end plate 11.

[0053] In some embodiments, as shown in FIG. 1, the motor further comprises a second housing 120, an input shaft 130, an output shaft and a gear transmission mechanism 140. The second housing 120 is integrally formed with the first housing 1, and the inner cavity of the second housing 120 is in communication with the inner cavity of the first housing 1 through the first stepped hole. The input shaft 130 is rotatably installed in the second housing 120 and coaxially connected with the rotor shaft 6. The output shaft is rotatably installed on the second housing 120, and the output shaft is drivingly connected with the input shaft 130 through the gear transmission mechanism 140.

[0054] The input shaft 130, the gear transmission mechanism 140, the output shaft and the second housing 120 constitute a speed reducer, i.e., a speed reducer integrated with the motor for increasing torque. The output shaft can be directly connected with the wheels of the vehicle, and the structure of the motor is more compact. Moreover, the design of the first housing 1 and the second housing 120 being integrally formed further improves the assembly efficiency of the motor.

[0055] Specifically, the part of the rotor shaft 6 protruding from the first housing 1 is located in the second housing 120 and is coaxially connected with the input shaft 130 through the spline. The gear transmission mechanism 140 can be a helical gear transmission mechanism 140, one of the helical gears of which is coaxially fixed on the input shaft 130, and one of the helical gears of which is coaxially fixed on the output shaft. In addition, the second housing 120 is open at the end away from the end plate 11, and the input shaft 130, the gear transmission mechanism 140 and the output shaft are assembled in the second housing 120 through the opening. The motor further comprises an end cover connected with the second housing 120 to close the opening.

[0056] In some embodiments, the rotor shaft 6, the inner rotor 2 and the inner stator 3 constitute a three-phase asynchronous motor. That is, the inner rotor 2 does not have permanent magnet material, and the inner rotor 2 has simple structure, low cost and convenient maintenance, thereby effectively reducing the manufacturing cost and maintenance cost of the motor.

[0057] The outer rotor 5 and the outer stator 4 constitute a permanent magnet synchronous motor. By providing that the outer rotor 5 comprises permanent magnet material, the volume of the outer rotor 5 can be reduced while the capacity is the same, thereby further reducing the volume and weight of the motor.

[0058] The vehicle according to the embodiments of the present disclosure comprises the motor according to any one of the above embodiments.

[0059] The technical advantages of the vehicle according to the embodiments of the present disclosure are the same as those of the motor according to the above embodiments.

[0060] In the description of the present disclosure, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0061] In addition, the terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0062] In the present disclosure, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0063] In the present disclosure, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature 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", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0064] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic being described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the description herein of various embodiments or examples of the disclosure can be combined with each other, and with different embodiments or examples of the disclosure, to form further embodiments or examples of the disclosure, without departing from the scope of the disclosure.

[0065] Although the above-mentioned embodiments have been shown and described, it is to be understood that the above-mentioned embodiments are exemplary, and are not to be construed as limiting the disclosure, and the changes, modifications, replacements, and variations of the above-mentioned embodiments made by those skilled in the art are within the protection scope of the disclosure.

Claims

1. An electric machine characterized in that, The motor comprises a first shell, an inner rotor, an inner stator, an outer stator, an outer rotor, a rotor shaft and a stator support frame, the rotor shaft, the inner rotor, the inner stator, the outer stator and the outer rotor are coaxial and arranged in sequence along the radial direction of the rotor shaft, the inner rotor is coaxially connected with the rotor shaft; The first shell comprises an end plate, the stator support frame is located on the side of the inner stator and the outer stator away from the end plate, the inner stator and the outer stator are connected between the end plate and the stator support frame through fasteners, and the rotor shaft is rotatably installed on the end plate and the stator support frame.

2. The electric machine of claim 1, wherein, The motor further comprises a rotor hub, the rotor hub is located in the first shell and coaxially connected with the outer rotor, at least part of the rotor hub is located on the side of the stator support frame away from the end plate, and the rotor hub is used for being connected with the flange drive of the crankshaft of an engine (150) or a range extender.

3. The electric machine of claim 2, wherein, The motor further comprises a first bearing, the end plate is provided with a first stepped hole, at least part of the rotor shaft passes through the first stepped hole and is exposed outside the first shell, and the first bearing is matched between the inner wall surface of the first stepped hole and the outer circumferential surface of the rotor shaft. The motor further comprises a second bearing, the stator support frame is provided with a second stepped hole, and the second bearing is matched between the inner wall surface of the second stepped hole and the outer circumferential surface of the rotor shaft.

4. The electric machine of claim 2, wherein, The motor further comprises a third bearing, the rotor hub is provided with a third stepped hole, the stator support frame comprises a support portion located in the third stepped hole, and the third bearing is matched between the inner wall surface of the third stepped hole and the outer circumferential surface of the support portion.

5. The electric machine of any one of claims 1 to 4, characterized in that, The outer stator is provided with a plurality of first through holes extending along the axial direction of the outer stator, the inner stator is provided with a plurality of second through holes extending along the axial direction of the inner stator, any one of the first through holes and any one of the second through holes are arranged in interval along the circumferential direction of the inner rotor, the outer stator is connected with the end plate and the stator support frame through first fasteners passing through the first through holes, and the inner stator is connected with the end plate and the stator support frame through second fasteners passing through the second through holes.

6. The electric machine of claim 5, wherein, The outer stator comprises an outer stator yoke, the inner stator comprises an inner stator yoke, the inner circumferential surface of the outer stator yoke is provided with a plurality of first connecting portions extending towards the inner stator yoke, the outer circumferential surface of the inner stator yoke is provided with a plurality of second connecting portions extending towards the outer stator yoke, a plurality of the first connecting portions and a plurality of the second connecting portions are alternately and interval arranged along the circumferential direction of the inner rotor, one of the first through holes is arranged on each of the first connecting portions, and one of the second through holes is arranged on each of the second connecting portions.

7. The electric machine of claim 6, wherein, The inner circumferential surface of the outer stator yoke is provided with a first groove for matching at least part of the second connecting portions, and the outer circumferential surface of the inner stator yoke is provided with a second groove for matching at least part of the first connecting portions.

8. The electric machine of any one of claims 5-7, wherein, The surface of the end plate facing the inner stator is provided with a plurality of first threaded holes and a plurality of second threaded holes; The stator support frame is provided with a plurality of third through holes corresponding to the first through holes and a plurality of fourth through holes corresponding to the second through holes; The first fastener and the second fastener are both screws, the first fastener passes through the third through hole and the first through hole and is screwed with the first threaded hole, and the second fastener passes through the fourth through hole and the second through hole and is screwed with the second threaded hole.

9. The electric machine of claim 3, wherein, The motor further comprises: a second housing which is integrally formed with the first housing, an inner cavity of the second housing being communicated with the inner cavity of the first housing through the first stepped hole; an input shaft which is rotatably installed in the second housing and coaxially connected with the rotor shaft; an output shaft and a gear transmission mechanism, the output shaft being rotatably installed on the second housing, and the output shaft being drivingly connected with the input shaft through the gear transmission mechanism.

10. The electric machine of any of claims 1-9, wherein, The rotor shaft, the inner rotor and the inner stator constitute a three-phase asynchronous motor; and / or The outer rotor and the outer stator constitute a permanent magnet synchronous motor.

11. A vehicle characterized by comprising: A motor comprising any one of the features of claims 1-10.

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