Rotor assembly, motor, electric assembly and vehicle

Abstract

The utility model discloses a rotor assembly, a motor and a vehicle. The rotor assembly comprises a rotating shaft and a rotor iron core, the rotating shaft is of a hollow structure with a cavity, an oil guide hole is formed in the outer surface of the rotating shaft, and the oil guide hole is communicated with the cavity; the rotor core is sleeved outside the rotating shaft, an oil guide groove is arranged between the outer surface of the rotating shaft and the inner surface of the rotor core, and the oil guide groove is communicated with the oil guide hole. According to the rotor assembly provided by the embodiment of the invention, the oil guide groove is arranged between the outer surface of the rotating shaft and the inner surface of the rotor iron core, so that the linear speed of oil can be reduced, disturbance is reduced, and the cooling effect of the rotor assembly is improved.

Description

Technical Field

[0001] The present application relates to the technical field of driving devices, and more particularly, to a rotor assembly, an electric motor, and a vehicle. Background Art

[0002] With the continuous increase in the promotion of new energy vehicles in China, pure electric vehicles with green and environmental protection characteristics have become an inevitable trend in the development of the future automotive industry, and they will gradually replace traditional fuel buses as the daily travel means for ordinary people. In recent years, the improvement of various performances of new energy vehicles has always been the focus of attention in the industry.

[0003] Among them, the performance and power density of the electric motor are particularly important, and the heat dissipation of the electric motor plays a key role. In the prior art, there are still deficiencies in the cooling and heat dissipation of the electric motor rotor, which easily causes the rotor temperature to be too high, thereby affecting the performance and service life of the electric motor. Therefore, it is necessary to improve the cooling structure of the electric motor rotor. Utility Model Content

[0004] An object of the present application is to provide a new technical solution for a rotor assembly, an electric motor, and a vehicle.

[0005] According to the first aspect of the present application, a rotor assembly is provided, which includes:

[0006] A rotating shaft, the rotating shaft is a hollow structure with a cavity, and an oil guiding hole is provided on the outer surface of the rotating shaft, and the oil guiding hole communicates with the cavity;

[0007] A rotor core, the rotor core is sleeved outside the rotating shaft, and an oil guiding groove is provided between the outer surface of the rotating shaft and the inner surface of the rotor core, and the oil guiding groove communicates with the oil guiding hole.

[0008] Optionally, the oil guiding groove extends along the axial direction of the rotating shaft.

[0009] Optionally, the oil guiding hole includes a plurality of first oil guiding holes and a plurality of second oil guiding holes, the first oil guiding holes are arranged near the first end of the rotating shaft, and the second oil guiding holes are arranged near the second end of the rotating shaft;

[0010] Along the circumferential direction of the rotating shaft, the first oil guiding holes and the second oil guiding holes are arranged alternately.

[0011] Optionally, a plurality of the oil guiding grooves are provided, and the plurality of oil guiding grooves are distributed along the circumferential direction of the rotating shaft; each oil guiding groove communicates with only one of the first oil guiding holes or one of the second oil guiding holes.

[0012] Optionally, the plurality of oil guiding grooves are evenly distributed along the circumferential direction of the rotating shaft.

[0013] Optionally, the rotor assembly further includes a first baffle and a second baffle, both of which are sleeved outside the rotating shaft; the first baffle is disposed on the first end face of the rotor core, the first end face is disposed adjacent to the first end of the rotating shaft, the second baffle is disposed on the second end face of the rotor core, and the second end face is disposed adjacent to the second end of the rotating shaft.

[0014] Optionally, the first baffle is provided with a plurality of first oil guiding grooves, and the second baffle is provided with a plurality of second oil guiding grooves;

[0015] The first oil guiding grooves are in one-to-one correspondence and communication with a part of the oil guiding grooves, and the second oil guiding grooves are in one-to-one correspondence and communication with another part of the oil guiding grooves; the one part of the oil guiding grooves are respectively in one-to-one correspondence and communication with a plurality of the second oil guiding holes, and the other part of the oil guiding grooves are respectively in one-to-one correspondence and communication with a plurality of the first oil guiding holes.

[0016] Optionally, the first baffle is provided with a plurality of first oil throwing holes, and the first oil throwing holes are in one-to-one correspondence and communication with the first oil guiding grooves;

[0017] The outlet direction of the first oil throwing hole forms an acute angle with the radially outward direction of the rotating shaft, so that the outlet direction of the first oil throwing hole faces the first winding of the stator assembly in the motor to which the rotor assembly is applied;

[0018] The second baffle is provided with a plurality of second oil throwing holes, and the second oil throwing holes are in one-to-one correspondence and communication with the second oil guiding grooves;

[0019] The outlet direction of the second oil throwing hole forms an acute angle with the radially outward direction of the rotating shaft, so that the outlet direction of the second oil throwing hole faces the second winding of the stator assembly in the motor to which the rotor assembly is applied.

[0020] Optionally, the rotor assembly further includes a bearing, and the bearing is connected to the rotating shaft; the rotating shaft is provided with a third oil throwing hole, the third oil throwing hole is in communication with the cavity, and the third oil throwing hole is disposed corresponding to the bearing.

[0021] According to a second aspect of the present application, there is provided a motor, the motor includes the rotor assembly as described in the first aspect, and further includes a stator assembly, and the stator assembly is sleeved outside the rotor assembly.

[0022] Optionally, the stator assembly includes a stator core, a first winding and a second winding, the stator core is sleeved outside the rotor core, and both the first winding and the second winding are connected to the stator core;

[0023] The first winding is disposed on the first end face of the stator core, and the second winding is disposed on the second end face of the stator core.

[0024] According to a third aspect of the present application, there is provided an electric assembly, which includes the motor as described in the second aspect.

[0025] According to a fourth aspect of the present application, there is provided a vehicle, which includes the electric assembly as described in the third aspect.

[0026] The technical solution adopted in the present application can achieve the following beneficial effects:

[0027] In the rotor assembly provided in the embodiment of the present application, oil guiding grooves are formed on the outer surface of the rotating shaft and / or the inner surface of the rotor core, and the oil guiding grooves are communicated with oil guiding holes; therefore, the cooling oil ejected from the oil guiding holes flows into the oil guiding grooves to cool and dissipate heat from the outer surface of the rotating shaft and the inner surface of the rotor core, thereby effectively dissipating heat from the rotor assembly, reducing the temperature rise of the rotor assembly, avoiding irreversible demagnetization of the magnetic steel caused by too high temperature of the rotor assembly, and improving the performance and service life of the motor to which the rotor assembly is applied.

[0028] Compared with the case where the oil guiding grooves are formed on the rotor core, in the embodiment of the present application, the oil guiding grooves are arranged between the outer surface of the rotating shaft and the inner surface of the rotor core, which can reduce the linear velocity of the oil fluid, thereby reducing disturbance to improve the cooling effect of the rotor assembly.

[0029] Through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings, other features and advantages of the present application will become clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application.

[0031] Figure 1 is a schematic structural diagram of a rotor assembly according to an embodiment of the present application;

[0032] Figure 2a is a schematic structural diagram of the rotating shaft in the rotor assembly according to an embodiment of the present application Figure 1 ;

[0033] Figure 2b is a second schematic structural diagram of the rotating shaft in the rotor assembly according to an embodiment of the present application;

[0034] Figure 3 is a schematic structural diagram of the rotor core in the rotor assembly according to an embodiment of the present application;

[0035] Figure 4Schematic diagram of the first baffle in the rotor assembly according to an embodiment of the present application;

[0036] Figure 5 Schematic diagram of the motor according to an embodiment of the present application.

[0037] Explanation of reference numerals:

[0038] 1. Rotor assembly; 100. Oil guiding groove; 11. Rotating shaft; 110. Cavity; 111. First oil guiding hole; 112. Second oil guiding hole; 113. Third oil throwing hole; 12. Rotor core; 120. Weight reducing hole; 13. First baffle; 131. First oil guiding groove; 130. First oil throwing hole; 14. Second baffle; 141. Second oil guiding groove; 140. Second oil throwing hole; 15. Bearing;

[0039] 2. Stator assembly; 21. Stator core; 22. First winding; 23. Second winding. Detailed implementation manners

[0040] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0041] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present application, its application, or its use.

[0042] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0043] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0044] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0045] Refer to Figures 1 - 5As shown, according to an embodiment of the present application, a rotor assembly 1 is provided. The rotor assembly 1 includes a rotating shaft 11 and a rotor core 12. The rotating shaft 11 is a hollow structure with a cavity 110. An oil guiding hole is formed on the outer surface of the rotating shaft 11, and the oil guiding hole communicates with the cavity 110. The rotor core 12 is sleeved outside the rotating shaft 11. An oil guiding groove 100 is provided between the outer surface of the rotating shaft 11 and the inner surface of the rotor core 12, and the oil guiding groove 100 communicates with the oil guiding hole.

[0046] In the rotor assembly provided by the embodiment of the present application, the rotating shaft 11 is arranged as a hollow structure. The hollow rotating shaft 11 not only helps to reduce the weight of the rotating shaft 11 and thus the weight of the rotor assembly, but also can hold cooling oil in the cavity 110 of the rotating shaft 11.

[0047] When the rotating shaft 11 rotates at a high speed, the cooling oil in the cavity 110 is thrown out through the oil guiding hole communicating with the cavity 110. And, since in the rotor assembly provided by the embodiment of the present application, an oil guiding groove 100 is provided between the outer surface of the rotating shaft 11 and the inner surface of the rotor core 12, and the oil guiding groove 100 communicates with the oil guiding hole. Therefore, the cooling oil thrown out from the oil guiding hole flows into the oil guiding groove 100 to cool and dissipate heat from the outer surface of the rotating shaft 11 and the inner surface of the rotor core 12, thereby effectively dissipating heat from the rotor assembly, reducing the temperature rise of the rotor assembly, avoiding irreversible demagnetization of the permanent magnet due to excessive temperature of the rotor assembly, and improving the performance and service life of the motor to which the rotor assembly is applied.

[0048] In the rotor assembly provided by the embodiment of the present application, referring to Figure 2b As shown, the oil guiding groove 100 can be only formed on the outer surface of the rotating shaft 11; referring to Figure 3 As shown, or the oil guiding groove 100 is only formed on the inner surface of the rotor core 12; or a first sub-groove is formed on the outer surface of the rotating shaft 11, and a second sub-groove is formed on the inner surface of the rotor core 12, and the first sub-groove and the second sub-groove are correspondingly spliced to form the oil guiding groove 100.

[0049] Since the rotor core 12 is sleeved outside the rotating shaft 11, the inner surface of the rotor core 12 is in close connection with the outer surface of the rotating shaft 11. Therefore, no matter which of the above situations is the case for the opening position of the oil guiding groove 100, it can effectively cool and dissipate heat from both the outer surface of the rotating shaft 11 and the inner surface of the rotor core 12.

[0050] Moreover, the rotor assembly provided by the embodiment of the present application arranges the oil guiding groove 100 between the outer surface of the rotating shaft 11 and the inner surface of the rotor core 12, which can reduce the linear velocity of the oil fluid, thereby reducing the disturbance to improve the cooling effect of the rotor assembly.

[0051] In addition, the opening of the oil guiding groove 100 also helps to reduce the weight of the rotor assembly, achieving the effect of lightweight of the rotor assembly, which is beneficial to the improvement of the vehicle's endurance. Moreover, weight-reducing holes 120 for weight reduction are also provided on the rotor core 12.

[0052] It can be understood that the outer surface of the rotating shaft 11 is the outer circumferential surface of the rotating shaft 11; the inner surface of the rotor core 12 is the corresponding surface when the rotor core 12 is sleeved on the rotating shaft 11.

[0053] Refer to Figure 2b As shown, in one embodiment, the oil guiding groove 100 extends along the axial direction of the rotating shaft 11.

[0054] In this specific example, the oil guiding groove 100 extends along the axial direction of the rotating shaft 11, which is beneficial to the flow of the cooling oil along the axial direction of the rotating shaft 11, thereby further improving the cooling effect.

[0055] Refer to Figure 2a 、 Figure 2b As shown, in one embodiment, the oil guiding holes include a plurality of first oil guiding holes 111 and a plurality of second oil guiding holes 112. The first oil guiding holes 111 are arranged near the first end of the rotating shaft 11, and the second oil guiding holes 112 are arranged near the second end of the rotating shaft 11;

[0056] Along the circumferential direction of the rotating shaft 11, the first oil guiding holes 111 and the second oil guiding holes 112 are arranged in an alternating manner.

[0057] In this specific example, the oil guiding holes include the first oil guiding holes 111 arranged near the first end of the rotating shaft 11 and the second oil guiding holes 112 arranged near the second end of the rotating shaft 11, and the first oil guiding holes 111 and the second oil guiding holes 112 are arranged in an alternating manner in the circumferential direction of the rotating shaft 11. That is, the connection line between any one of the first oil guiding holes 111 and any one of the second oil guiding holes 112 is inclined with respect to the axial direction of the rotating shaft 11 rather than parallel. This is beneficial to ensuring the dynamic balance when the rotating shaft 11 rotates at high speed and can improve the uniformity of oil throwing of the oil guiding holes, avoiding too much or too little oil in local areas.

[0058] Refer to Figure 2b As shown, in one embodiment, a plurality of the oil guiding grooves 100 are provided, and the plurality of the oil guiding grooves 100 are distributed along the circumferential direction of the rotating shaft 11; each of the oil guiding grooves 100 is only communicated with one of the first oil guiding holes 111 or one of the second oil guiding holes 112.

[0059] In this specific example, for any oil guiding groove 100, it is only correspondingly connected to one first oil guiding hole 111 or correspondingly connected to one second oil guiding hole 112; this can ensure that the cooling oil ejected from the oil guiding hole can be evenly distributed in each oil guiding groove 100, thereby further ensuring that the cooling oil can uniformly and efficiently cool and dissipate heat from the outer surface of the rotating shaft 11 and the inner surface of the rotor core 12.

[0060] Preferably, some of the oil guiding grooves 100 are arranged in one-to-one correspondence with a plurality of first oil guiding holes 111, and the other part of the oil guiding grooves 100 are arranged in one-to-one correspondence with a plurality of second oil guiding holes 112, so that after the oil enters each oil guiding hole, it can enter the corresponding oil guiding groove 100 along each oil guiding hole and flow out to cool the rotor core 12 and the rotating shaft 11.

[0061] Refer to Figure 2b As shown, in one embodiment, a plurality of the oil guiding grooves 100 are evenly distributed along the circumferential direction of the rotating shaft 11.

[0062] In this specific example, a plurality of oil guiding grooves 100 are evenly distributed along the circumferential direction of the rotating shaft 11, which can increase the heat dissipation area of the rotor assembly and make the heat dissipation effect more uniform.

[0063] Refer to Figure 1 、 Figure 4 As shown, in one embodiment, the rotor assembly further includes a first baffle 13 and a second baffle 14, and both the first baffle 13 and the second baffle 14 are sleeved outside the rotating shaft 11; and the first baffle 13 is arranged on the first end face of the rotor core 12, the first end face is arranged near the first end of the rotating shaft 11, the second baffle 14 is arranged on the second end face of the rotor core 12, and the second end face is arranged near the second end of the rotating shaft 11.

[0064] In this specific example, the rotor assembly further includes a first baffle 13 and a second baffle 14, and both the first baffle 13 and the second baffle 14 are sleeved outside the rotating shaft 11. The first baffle 13 is arranged on the first end face of the rotor core 12, while the second baffle 14 is arranged on the second end face of the rotor core 12. This setting method helps to fix the rotor core 12 and prevent the cooling oil from leaking from the end faces of the rotor core 12.

[0065] Refer to Figure 1 、 Figure 4 As shown, in one embodiment, the first baffle 13 is provided with a plurality of first oil guiding grooves 131, and the second baffle 14 is provided with a plurality of second oil guiding grooves 141;

[0066] The first oil guiding groove 131 is in one-to-one correspondence and communication with a part of the oil guiding grooves 100, and the second oil guiding groove 141 is in one-to-one correspondence and communication with another part of the oil guiding grooves 100; the part of the oil guiding grooves 100 are respectively in one-to-one correspondence and communication with a plurality of the second oil guiding holes 112, and the other part of the oil guiding grooves 100 are respectively in one-to-one correspondence and communication with a plurality of the first oil guiding holes 111.

[0067] In this specific example, the first oil guiding groove 131 formed in the first baffle 13 is in one-to-one correspondence and communication with a part of the oil guiding grooves 100, and the part of the oil guiding grooves 100 are respectively in one-to-one correspondence and communication with a plurality of the second oil guiding holes 112; the second oil guiding groove 141 formed in the second baffle 14 is in one-to-one correspondence and communication with another part of the oil guiding grooves 100, and the other part of the oil guiding grooves 100 are respectively in one-to-one correspondence and communication with a plurality of the first oil guiding holes 111; in this way, an interleaved oil path can be formed, thereby increasing the heat dissipation area of the rotor assembly and improving the heat dissipation effect.

[0068] Refer to Figure 1 、 Figure 2a and Figure 2b As shown in, in one embodiment, the rotor assembly further includes a bearing 15, and the bearing 15 is connected to the rotating shaft 11; the rotating shaft 11 is provided with a third oil slinging hole 113, the third oil slinging hole 113 is in communication with the cavity 110, and the third oil slinging hole 113 is arranged corresponding to the bearing 15.

[0069] In this specific example, when the rotating shaft 11 rotates at a high speed, the cooling oil in the cavity 110 is slung out through the third oil slinging hole 113 communicated with the cavity 110, thereby cooling and dissipating heat from the bearing 15. In addition, the cooling oil can also play a role in lubricating the bearing 15.

[0070] In one embodiment, the third oil slinging hole 113 forms an angle with the radial direction of the rotating shaft 11.

[0071] In this specific example, the third oil slinging hole 113 has a certain inclination angle and is inclined along the oil inlet direction, so as to facilitate the oil film distributed inside the rotating shaft 11 to be slung out from the third oil slinging hole 113 and then effectively cool the bearing 15.

[0072] Refer to Figure 5 As shown in, according to another embodiment of the present application, there is provided an electric motor, the electric motor includes the rotor assembly 1 as described above, and further includes a stator assembly 2, and the stator assembly 2 is sleeved outside the rotor assembly 1.

[0073] Since the electric motor provided by the embodiment of the present application includes the above-mentioned rotor assembly 1, the electric motor has strong cooling and heat dissipation capabilities, and its performance and service life are relatively high.

[0074] The stator assembly 2 includes a stator core 21, a first winding 22, and a second winding 23. The stator core 21 is sleeved outside the rotor core 12, and both the first winding 22 and the second winding 23 are connected to the stator core 21;

[0075] The first winding 22 is disposed on the first end face of the stator core 21, and the second winding 23 is disposed on the second end face of the stator core 21.

[0076] In this specific example, when the motor is operating, current can generate a magnetic field through the first winding 22 and the second winding 23, interact with the magnetic field of the rotor assembly, thereby achieving the conversion of electrical energy.

[0077] Referring to Figure 5 As shown, in one embodiment, the first baffle 13 is provided with a plurality of first oil slinging holes 130, and the first oil slinging holes 130 are in one-to-one correspondence and communication with the first oil guiding groove 131; the outlet direction of the first oil slinging hole 130 forms an acute angle with the radially outward direction of the rotating shaft 11, so that the outlet direction of the first oil slinging hole 130 is arranged towards the first winding 22;

[0078] The second baffle 14 is provided with a plurality of second oil slinging holes 140, the second oil slinging holes 140 are in one-to-one correspondence and communication with the second oil guiding groove 141, and the outlet direction of the second oil slinging hole 140 forms an acute angle with the radially outward direction of the rotating shaft 11, so that the outlet direction of the second oil slinging hole 140 is arranged towards the second winding 23.

[0079] In this specific example, in order to further improve the heat dissipation performance of the motor, a plurality of first oil slinging holes 130 and second oil slinging holes 140 are respectively provided on the first baffle 13 and the second baffle 14 of the rotor assembly. The first oil slinging holes 130 are in one-to-one correspondence and communication with the first oil guiding groove 131, and form a first predetermined angle with the radial direction of the rotating shaft 11. In this way, when the rotating shaft 11 rotates, the cooling oil can be slung out through the first oil slinging holes 130 and sprayed towards the first winding 22 to cool and dissipate heat from the first winding 22. Similarly, the second oil slinging holes 140 are in one-to-one correspondence and communication with the second oil guiding groove 141, and form a second predetermined angle with the radial direction of the rotating shaft 11 to achieve the cooling and heat dissipation of the second winding 23.

[0080] Referring to Figure 5 As shown, in one embodiment, the acute angle is 30 - 60°.

[0081] In this specific example, the acute angle formed by the first oil slinging hole 130 and the radially outward direction of the rotating shaft 11 and the acute angle formed by the second oil slinging hole 140 and the radially outward direction of the rotating shaft 11 are both set to 30 - 60°, so as to ensure that the cooling oil can be slung to the middle part of the winding, and the winding dissipates heat more evenly.

[0082] According to still another embodiment of the present application, an electric assembly is provided, and the electric assembly includes the motor as described above.

[0083] According to yet another embodiment of the present application, a vehicle is provided, and the vehicle includes the electric assembly as described above. Due to the inclusion of the above electric assembly, the vehicle has a high endurance capacity.

[0084] In the above embodiments, the differences between the embodiments are mainly described. As long as the different optimization features between the embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0085] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A rotor assembly, characterized in that: include: A rotating shaft (11), the rotating shaft (11) being a hollow structure having a cavity (110), an oil guide hole being provided on the outer surface of the rotating shaft (11), the oil guide hole being in communication with the cavity (110); A rotor core (12) is sleeved on the outside of the rotating shaft (11), an oil guide groove (100) is provided between the outer surface of the rotating shaft (11) and the inner surface of the rotor core (12), and the oil guide groove (100) is communicated with the oil guide hole.

2. The rotor assembly according to claim 1, characterized in that The oil guide groove (100) is arranged to extend along the axial direction of the rotating shaft (11).

3. The rotor assembly according to claim 1 or 2, characterized in that: The oil guide holes include a plurality of first oil guide holes (111) and a plurality of second oil guide holes (112), wherein the first oil guide holes (111) are arranged close to the first end of the rotating shaft (11), and the second oil guide holes (112) are arranged close to the second end of the rotating shaft (11); Along the circumferential direction of the rotating shaft (11), the first oil guide holes (111) and the second oil guide holes (112) are arranged alternately.

4. The rotor assembly according to claim 3, characterized in that: A plurality of the oil guide grooves (100) are provided, and the plurality of the oil guide grooves (100) are distributed along the circumference of the rotating shaft (11); each of the oil guide grooves (100) is connected to only one of the first oil guide holes (111) or one of the second oil guide holes (112).

5. The rotor assembly according to claim 4, characterized in that: The plurality of oil guide grooves (100) are evenly distributed along the circumference of the rotating shaft (11).

6. The rotor assembly according to claim 4, characterized in that: The rotor assembly further comprises a first baffle (13) and a second baffle (14), wherein the first baffle (13) and the second baffle (14) are both sleeved on the outside of the rotating shaft (11); and the first baffle (13) is arranged on a first end surface of the rotor core (12), wherein the first end surface is arranged close to the first end of the rotating shaft (11), and the second baffle (14) is arranged on a second end surface of the rotor core (12), wherein the second end surface is arranged close to the second end of the rotating shaft (11).

7. The rotor assembly according to claim 6, characterized in that The first baffle plate (13) is provided with a plurality of first oil guide grooves (131), and the second baffle plate (14) is provided with a plurality of second oil guide grooves (141); The first oil guide groove (131) is connected to a portion of the oil guide grooves (100) in a one-to-one correspondence, and the second oil guide groove (141) is connected to another portion of the oil guide grooves (100) in a one-to-one correspondence; the portion of the oil guide grooves (100) is connected to a plurality of the second oil guide holes (112) in a one-to-one correspondence, and the other portion of the oil guide grooves (100) is connected to a plurality of the first oil guide holes (111) in a one-to-one correspondence.

8. The rotor assembly according to claim 7, characterized in that The first baffle (13) is provided with a plurality of first oil-spinning holes (130), and the first oil-spinning holes (130) are connected to the first oil-guiding grooves (131) in a one-to-one correspondence; The outlet direction of the first oil-slinging hole (130) forms an acute angle with the radial outward direction of the rotating shaft (11), so that the outlet direction of the first oil-slinging hole (130) is arranged toward the first winding of the stator assembly in the motor used by the rotor assembly; The second baffle (14) is provided with a plurality of second oil-slinging holes (140), and the second oil-slinging holes (140) are connected to the second oil-guiding grooves (141) in a one-to-one correspondence; The outlet direction of the second oil-slinging hole (140) forms an acute angle with the radial outward direction of the rotating shaft (11), so that the outlet direction of the second oil-slinging hole (140) is arranged toward the second winding of the stator assembly in the motor used by the rotor assembly.

9. The rotor assembly according to claim 1, characterized in that: The rotor assembly further comprises a bearing (15), wherein the bearing (15) is connected to the rotating shaft (11); the rotating shaft (11) is provided with a third oil-swinging hole (113), wherein the third oil-swinging hole (113) is communicated with the cavity (110), and the third oil-swinging hole (113) is arranged corresponding to the bearing (15).

10. A motor, characterized in that: The motor comprises a rotor assembly (1) as claimed in any one of claims 1 to 9, and further comprises a stator assembly (2), wherein the stator assembly (2) is sleeved on the outside of the rotor assembly (1).

11. The motor according to claim 10, characterized in that The stator assembly (2) comprises a stator core (21), a first winding (22) and a second winding (23); the stator core (21) is sleeved on the outside of the rotor core (12); and the first winding (22) and the second winding (23) are both connected to the stator core (21); The first winding (22) is arranged on a first end surface of the stator core (21), and the second winding (23) is arranged on a second end surface of the stator core (21).

12. An electric assembly, characterized in that: The electric assembly comprises the electric machine according to any one of claims 10-11.

13. A vehicle, characterized in that: The vehicle includes the electric powertrain of claim 12 .

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