Rotor, electric machine, drive assembly and vehicle

Abstract

The application discloses a rotor, a motor, a driving assembly and a vehicle, relates to the technical field of motors, and aims to solve the problem of how to improve the cooling effect of the motor. The rotor can include a rotating shaft and a magnetic assembly, the magnetic assembly is sleeved on the outer circumferential surface of the rotating shaft, and the magnetic assembly is internally provided with a first cooling flow path and a second cooling flow path. When the first cooling flow path is in a conduction state or a disconnected state, the second cooling flow path can be switched between the conduction state and the disconnected state.

Description

Technical Field

[0001] This application relates to the field of electric motor technology, and more particularly to a rotor, an electric motor, a drive assembly, and a vehicle. Background Technology

[0002] The electric motor is a crucial component of a vehicle, driving the wheels to rotate. During operation, the internal rotor and stator generate a significant amount of heat, requiring cooling to maintain continuous operation.

[0003] In related technologies, a cavity is usually set inside the rotor shaft and filled with cooling oil. Cooling channels connected to the cavity are set inside the iron core located on the outer circumference of the rotor shaft and the stator. The cooling oil circulates under the action of the oil pump to absorb the heat of the rotor shaft, iron core and stator.

[0004] However, the motor rotor cooling methods in related technologies are limited and cannot be adapted to different operating conditions of the motor, resulting in poor cooling performance of the motor rotor. Summary of the Invention

[0005] The purpose of this application is to provide a rotor, motor, drive assembly, and vehicle that aims to solve the problem of how to improve the cooling effect of the motor rotor.

[0006] In a first aspect, a motor is provided, including a rotating shaft and a magnetic assembly. The magnetic assembly is sleeved on the outer peripheral surface of the rotating shaft, and a first cooling flow path and a second cooling flow path are provided within the magnetic assembly. When the first cooling flow path is in a conductive state or a disconnected state, the second cooling flow path can switch between a conductive state and a disconnected state.

[0007] In this way, the on / off state of the first cooling path does not affect the on / off state of the second cooling path, allowing the cooling media in both paths to independently cool the rotor. This enables the selective activation of both cooling paths based on different motor operating states, effectively improving rotor cooling performance.

[0008] Optionally, the motor has a first operating mode and a second operating mode. In the first operating mode, the motor is cooled by a cooling medium in a first cooling flow path. In the second operating mode, the motor is cooled by a cooling medium in a second cooling flow path.

[0009] Optionally, in the second operating mode, the motor is cooled by the cooling medium in the first cooling flow path and the second cooling flow path.

[0010] Optionally, in the first operating mode, the shaft rotates. In the second operating mode, the shaft remains stationary.

[0011] Optionally, the rotating shaft is provided with a first cavity and a second cavity that are isolated from each other. The first cavity is connected to a first cooling flow path, and the second cavity is connected to a second cooling flow path.

[0012] Optionally, the magnetic component includes an iron core, which is sleeved on the outer circumferential surface of the rotating shaft, and a first cooling flow path is formed inside the iron core.

[0013] Optionally, the core is provided with weight-reducing holes. The weight-reducing holes form the first cooling flow path.

[0014] Optionally, the iron core has at least one receiving groove. The magnetic assembly also includes a magnet assembly disposed within at least one receiving groove and connected to the iron core, wherein a second cooling flow path is defined between the magnet assembly and the inner wall surface of the receiving groove.

[0015] Optionally, the second cooling flow path is located on the side of the first cooling flow path away from the rotating shaft.

[0016] Optionally, the motor has a first operating mode and a second operating mode. In the first operating mode, the shaft rotates, and the motor is cooled only by the cooling medium in the first cooling flow path. In the second operating mode, the shaft is stationary, and the motor is cooled by both the first and second cooling flow paths.

[0017] Optionally, the rotating shaft has a first liquid inlet and a second liquid inlet. The rotating shaft also includes a separator disposed inside the rotating shaft to form a first cavity and a second cavity, the first liquid inlet being connected to the first cavity and the second liquid inlet being connected to the second cavity.

[0018] Optionally, the rotating shaft is provided with a first connecting channel and a second connecting channel. The first connecting channel connects the first cavity and the first cooling flow path, and the second connecting channel connects the second cavity and the second cooling flow path.

[0019] Optionally, the magnetic assembly further includes an iron core, a first magnetic shielding plate, and a second magnetic shielding plate. The iron core is sleeved on the outer circumferential surface of the rotating shaft, and a first cooling flow path and a second cooling flow path are formed inside the iron core. The first magnetic shielding plate is disposed on one axial end face of the iron core, and a third connecting flow channel is formed between the first magnetic shielding plate and the iron core. The first liquid inlet, the first cavity, the first connecting flow channel, the third connecting flow channel, and the first cooling flow path are sequentially connected. The second magnetic shielding plate is disposed on the other axial end face of the iron core, and a fourth connecting flow channel is formed between the second magnetic shielding plate and the iron core. The second liquid inlet, the second cavity, the second connecting flow channel, the fourth connecting flow channel, and the second cooling flow path are sequentially connected.

[0020] Optionally, the first magnetic shielding baffle has a first liquid outlet, and the second magnetic shielding baffle has a second liquid outlet. One end of the first liquid outlet is connected to the second cooling flow path, and the other end of the first liquid outlet is adapted to connect to the return liquid channel. One end of the second liquid outlet is connected to the first cooling flow path, and the other end of the second liquid outlet is adapted to connect to the return liquid channel.

[0021] Optionally, the motor includes a housing having a liquid supply port, a liquid supply channel, and a liquid return channel. One end of the liquid supply channel is adapted to connect to the liquid supply port, and the other end of the liquid supply channel is connected to the inlet of the first cooling flow path and the inlet of the second cooling flow path. One end of the liquid return channel is connected to the outlet of the first cooling flow path and the outlet of the second cooling flow path, respectively, and the other end of the liquid return channel is adapted to connect to the liquid supply port.

[0022] Optionally, the housing forms a motor cavity for accommodating the rotating shaft and magnetic components, one end of the return channel is connected to the motor cavity, the outlet of the first cooling flow path is connected to the motor cavity, and the outlet of the second cooling flow path is connected to the motor cavity.

[0023] Optionally, the shaft has a second liquid inlet communicating with the second cooling flow path. The motor also includes a control valve located in the liquid supply channel and between the liquid supply hole and the second liquid inlet, controlling whether the liquid supply hole and the second liquid inlet are connected or disconnected.

[0024] Optionally, the shaft also has a first liquid inlet, a first connecting flow channel, and a second connecting flow channel. The magnetic assembly further includes an iron core, a first magnetic shielding baffle, and a second magnetic shielding baffle. The first magnetic shielding baffle has a first liquid outlet, and the second magnetic shielding baffle has a second liquid outlet. A third connecting flow channel is formed between the first magnetic shielding baffle and the iron core, and a fourth connecting flow channel is formed between the second magnetic shielding baffle and the iron core. The third connecting flow channel connects the first connecting flow channel and the first cooling flow path, and the fourth connecting flow channel connects the second connecting flow channel and the second cooling flow path.

[0025] Optionally, the liquid supply channel includes a main pipeline and a first liquid supply line. The main pipeline is connected to the liquid supply port. One end of the first liquid supply line is connected to the main pipeline, and the other end of the first liquid supply line is connected to the first liquid inlet.

[0026] Optionally, the liquid supply channel may also include a second liquid supply line, one end of which is connected to the main line and the other end of which can be connected to the second liquid inlet.

[0027] Secondly, a rotor is also provided, including a shaft and a magnetic assembly. The shaft has a first cavity and a second cavity that are isolated from each other. The magnetic assembly is sleeved on the outer peripheral surface of the shaft, and the magnetic assembly has a first cooling flow path and a second cooling flow path. The first cavity is connected to the first cooling flow path, and the second cavity is connected to the second cooling flow path.

[0028] Thirdly, a drive assembly is also provided, including the aforementioned motor.

[0029] Optionally, the drive assembly also includes a reducer housing and a reduction gear assembly. The motor includes a housing that encloses a motor cavity for accommodating the shaft and magnetic assembly. The reducer housing encloses a reducer cavity, and the reduction gear assembly is housed within the reducer cavity. The shaft is drively connected to the reduction gear assembly.

[0030] Optionally, the rotating shaft is provided with a first cavity and a second cavity arranged sequentially along the axial direction and isolated from each other. The second cavity is located between the reducer cavity and the first cavity, and the end of the second cavity facing away from the first cavity is connected to the reducer cavity. The first cavity is connected to the first cooling flow path, and the second cavity is connected to the second cooling flow path.

[0031] Optionally, the reduction assembly includes a main shaft, which is coaxially arranged with the rotating shaft. The main shaft extends from one end of the second cavity into the second cavity and is connected to the rotating shaft for transmission. The main shaft has a first internal flow path, which communicates with the second cavity. The housing has a first liquid supply line communicating with the first cavity, and the reducer housing has a third liquid supply line communicating with the first internal flow path.

[0032] Optionally, the housing also has a second liquid supply line, which is connected to the second cavity via a third liquid supply line.

[0033] Optionally, the reduction assembly also includes a drive shaft connected to the main shaft drive, and the drive shaft has a second internal flow path, a second liquid supply line, a second internal flow path, a third liquid supply line, a first internal flow path, and a second cavity connected in sequence.

[0034] Optionally, the housing also has a liquid supply port, and both the first liquid supply line and the second liquid supply line are connected to the liquid supply port.

[0035] Optionally, the number of motors, reducer housings, and reduction components are all two, and they correspond one-to-one. The shafts of the two motors are coaxially arranged, and the two reducer housings are spaced apart along the axial direction of the shafts. The two motors are located between the two reducer housings, and the motor housings and the adjacent reducer housings form a reducer cavity.

[0036] Optionally, the housing also includes a first main pipeline and a second main pipeline, located between the two motors, which are adapted to supply liquid to the two motors respectively. The first main pipeline and the second main pipeline are arranged opposite to each other along a first direction, and the extending directions of the first main pipeline and the second main pipeline are perpendicular to the first direction.

[0037] Fourthly, a vehicle is also provided, including the aforementioned motor, rotor, or drive assembly. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0040] Figure 2 for Figure 1 Schematic diagram of the drive assembly;

[0041] Figure 3 This is a schematic diagram of the structure of the motor provided in an embodiment of this application;

[0042] Figure 4 for Figure 3 Schematic diagram of the oil flow path.

[0043] Figure label:

[0044] 1000, vehicles;

[0045] 100. Drive assembly; 200. Wheels; 300. Body;

[0046] 10. Housing; 11. First motor; 12. Second motor; 13. First main pipeline; 14. Second main pipeline;

[0047] 20. Motor; 21. Motor cavity; 22. Reducer cavity; 23. Rotor; 231. Shaft; 2311. First cavity; 2312. Second cavity; 2313. First liquid inlet; 2314. Second liquid inlet; 2315. Separator; 2316. First connecting channel; 2317. Second connecting channel; 232. Magnetic assembly; 2321. First cooling path; 2322. Second cooling path; 2323. Iron core; 2324. Magnet assembly; 24. Stator; 25. Coil winding; 61. First magnetic shielding baffle; 2611. Third connecting channel; 2612. First liquid outlet; 262. Second magnetic shielding baffle; 2621. Fourth connecting channel; 2622. Second liquid outlet; 271. Liquid supply channel; 2711. Main pipeline; 2712. First liquid supply pipeline; 2713. Second liquid supply pipeline; 27131. Second shaft internal flow path; 27132. First shaft internal flow path; 27133. Reducer housing; 272. Return channel; 273. Liquid supply hole; 28. Control valve; 29. ​​Main shaft;

[0048] F1, First Direction. Detailed Implementation

[0049] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application are within the scope of protection of this application.

[0050] Figure 1 This is a schematic diagram of the vehicle structure provided in the embodiments of this application. Figure 1 This application provides a vehicle 1000, which includes a drive assembly 100, wheels 200 and a body 300. The drive assembly 100 can drive the wheels 200 to rotate, so that the body 300 moves relative to the road surface.

[0051] Figure 2 for Figure 1 A schematic diagram of the drive assembly. Figure 3 This is a schematic diagram of the motor structure provided in an embodiment of this application. (See attached diagram.) Figure 2 and Figure 3 This application also provides a drive assembly 100, which further includes a housing 10 and two motors 20, namely a first motor 11 and a second motor 12, which are disposed opposite to each other within the housing 10 along a first direction F1. Thus, the first motor 11 can be used to drive the left wheel 200 of the vehicle 1000, and the second motor 12 can be used to drive the right wheel 200 of the vehicle 1000. The first motor 11 and the second motor 12 can be integrated into a single housing 10, making the drive assembly 100 compact.

[0052] Continue reading Figure 2 In some embodiments of this application, the housing 10 is further provided with a first main pipeline 13 and a second main pipeline 14, which are located between the first motor 11 and the second motor 12. The first main pipeline 13 is adapted to supply liquid to the first motor 11, and the second main pipeline 14 is adapted to supply liquid to the second motor 12. The first main pipeline 13 and the second main pipeline 14 are arranged opposite to each other along a first direction F1, and the extension direction of the first main pipeline 13 and the extension direction of the second main pipeline 14 are perpendicular to the first direction F1.

[0053] Understandably, the first motor 11 and the second motor 12 can be symmetrically arranged with the first main pipeline 13 and the second main pipeline 14 as the axis of symmetry, facilitating the supply of coolant from the first main pipeline 13 to the first motor 11 and from the second main pipeline 14 to the second motor 12. The coolant in the first main pipeline 13 and the coolant in the second main pipeline 14 are independent of each other, achieving separate cooling for the first motor 11 and the second motor 12, preventing a failure in one from affecting the cooling of the other. Furthermore, the layout of the cooling pipes and the motor 20 is relatively reasonable, further enhancing the compact structure of the drive assembly 100.

[0054] It should be noted that the coolant mentioned above can be oil, cooling water or other cooling media, and its specific physical state can be liquid or gas-liquid mixture, etc. The following explanation uses oil as an example.

[0055] In related technologies, there is usually only one oil circuit inside the motor rotor. The entire oil circuit can only switch between two states: fully oiled and completely oil-free. This makes the cooling method of the motor rotor singular and cannot be adjusted according to different operating conditions of the motor, resulting in poor cooling effect of the motor rotor.

[0056] To resolve the aforementioned technical issues, please refer to [link / reference needed]. Figure 3 The motor 20 provided in this application includes a rotor 23, which has multiple independent cooling flow paths.

[0057] In some embodiments of this application, the rotor 23 is provided with a first cooling flow path 2321 and a second cooling flow path 2322. When the first cooling flow path 2321 is in a conducting state or a disconnected state, the second cooling flow path 2322 can switch between a conducting state and a disconnected state.

[0058] In this way, the on / off state of the first cooling flow path 2321 does not affect the on / off state of the second cooling flow path 2322, thus allowing the cooling medium in both the first and second cooling flow paths 2321 to independently cool the rotor 23. This allows the first and second cooling flow paths 2321 and 2322 to be selectively activated according to different operating states of the motor 20, effectively improving the cooling effect on the rotor 23 of the motor 20.

[0059] It should be explained that the independent cooling of rotor 23 by the first cooling flow path 2321 and the second cooling flow path 2322 means that when cooling rotor 23, rotor 23 can be cooled only by the cooling medium in the first cooling flow path 2321 or only by the cooling medium in the second cooling flow path 2322. Of course, rotor 23 can also be cooled by the cooling medium in the first cooling flow path 2321 and the second cooling flow path 2322 at the same time.

[0060] Therefore, in some embodiments of this application, the motor 20 has a first operating mode and a second operating mode.

[0061] In the first operating mode, the rotor 23 is cooled by the cooling medium in the first cooling flow path 2321.

[0062] In the second operating mode, the rotor 23 is cooled by the cooling medium in the second cooling flow path 2322.

[0063] This allows the rotor 23 to switch between the first operating mode and the second operating mode to achieve the operating state of the first cooling flow path 2321 and the second cooling flow path 2322, thereby adjusting the cooling effect of the cooling medium in the first cooling flow path 2321 and the second cooling flow path 2322 on the motor.

[0064] In some embodiments, in the second operating mode, the rotor 23 is cooled by the cooling medium in the first cooling flow path 2321 and the second cooling flow path 2322. Of course, in some other embodiments, the first cooling flow path 2321 can also be disconnected to stop the cooling of the rotor 23 by the cooling medium in the first cooling flow path 2321.

[0065] This improves the coordination between the first cooling flow path 2321 and the second cooling flow path 2322, allowing the first cooling flow path 2321 and the second cooling flow path 2322 to be selectively opened according to different operating states of the motor 20, thereby further enhancing the cooling effect on the rotor 23.

[0066] In some embodiments, the rotor 23 may further include a shaft 231. In a first operating mode, the shaft 231 rotates. In a second operating mode, the shaft 231 remains stationary.

[0067] When motor 20 is in the first operating mode, vehicle 1000 is in drive mode. At this time, the rotor 23 of motor 20 rotates, driving shaft 231 to rotate and drive vehicle 1000 to move. At this time, the heat generated by rotor 23 is relatively small, and rotor 23 can be cooled only by the cooling medium in the first cooling flow path 2321.

[0068] When motor 20 is in the second operating mode, vehicle 1000 is in charging mode. At this time, shaft 231 is stationary. When vehicle 1000 is in parking charging mode, the charging current during high-power fast charging is large, which will intensify the changes in the electromagnetic field inside motor 20. The magnet assembly 2324 will generate more eddy current losses and hysteresis losses in the rapidly changing magnetic field, resulting in increased heat generation. If the magnet assembly 2324 on the iron core 2323 is indirectly cooled by the first cooling flow path 2321 through cooling the iron core 2323, the heat dissipation of the magnet assembly 2324 may be less than the heat generation, leading to excessively high temperature of the magnet assembly 2324. In this case, the rotor 23 can be cooled simultaneously by the cooling medium in the first cooling flow path 2321 and the second cooling flow path 2322 to improve the cooling effect of the rotor 23.

[0069] Since the two motors 20 in the drive assembly provided in this application have the same structure, the following will take one of the motors 20 as an example, first briefly introduce the overall structure of the motor 20, and then elaborate on the improved structure of the rotor 23 in the motor 20 and its related parts.

[0070] See Figure 3 In some embodiments of this application, the motor 20 includes a housing 10, the housing 10 having a motor cavity 21 for accommodating the motor body.

[0071] The motor 20 also includes a reducer housing and a reducer assembly. The reducer housing encloses a reducer cavity 22, and the reducer assembly is housed within the reducer cavity 22. The rotating shaft 231 is connected to the reducer assembly in a transmission manner.

[0072] Oil can be supplied between the motor cavity 21 and the reducer cavity 22 via an oil pipe. Understandably, the motor body and the reduction gear assembly of this application are integrated to form a geared motor. This allows for a more compact structure of the drive assembly 100, easier installation and maintenance, and better matching of the performance of the motor body 20 and the reduction gear assembly, thereby improving the efficiency and reliability of the entire drive assembly 100.

[0073] In some embodiments, the number of motor 20, reducer housing, and reduction assembly are all two and correspond one-to-one.

[0074] The two motor shafts 231 are coaxially arranged, and the two reducer housings are spaced apart along the axial direction of the shafts 231. The two motors are located between the two reducer housings, and the motor housing 10 of the motors and the adjacent reducer housings form a reducer cavity 22. In this way, the two motors and the two adjacent reduction assemblies can form a geared motor. This allows for a more compact structure of the drive assembly 100 and provides stable driving for the vehicle 1000.

[0075] Continue reading Figure 3 In some embodiments of this application, the motor 20 may further include a stator 24 and a coil winding 25. The stator 24 is disposed on the outer peripheral surface of the rotor 23, and the coil winding 25 is wrapped around the stator 24. When three-phase alternating current is applied to the coil, a rotating magnetic field is generated. The rotor 23 itself can also generate a magnetic field. The two magnetic fields interact to generate an electromagnetic force, thereby driving the rotor 23 to rotate.

[0076] Figure 4 for Figure 3 Schematic diagram of oil flow path, see reference. Figure 3 and Figure 4 In some embodiments of this application, the rotor 23 may further include a magnetic component 232. A first cavity 2311 and a second cavity 2312 are provided within the rotating shaft 231. The magnetic component 232 is sleeved on the outer peripheral surface of the rotating shaft 231, and a first cooling flow path 2321 and a second cooling flow path 2322 are provided within the magnetic component 232. The first cavity 2311 is connected to the first cooling flow path 2321, and the second cavity 2312 is connected to the second cooling flow path 2322.

[0077] Understandably, the heat generated within the magnetic component 232 and the temperature of the magnetic component 232 will differ depending on the operating state of the motor 20. This application constructs two oil chambers, a first cavity 2311 and a second cavity 2312, inside the shaft 231, and correspondingly constructs two cooling flow paths within the magnetic component 232 outside the shaft 231. One of the oil chambers inside the shaft 231 is connected to the first cooling flow path 2321 in the magnetic component 232, and the other oil chamber inside the shaft 231 is connected to the second cooling flow path 2322 in the magnetic component 232.

[0078] Thus, when the temperature of the magnetic component 232 is low, the second cooling flow path 2322 can be disconnected, and the basic cooling requirements of the rotor 23 can be met only by the first cooling flow path 2321. When the temperature of the magnetic component 232 is high, the oil in the other oil chamber can be controlled to flow into the second cooling flow path 2322. At this time, the second cooling flow path 2322 and the first cooling flow path 2321 can work together to cool the magnetic component 232, thereby improving the cooling effect of the rotor 23.

[0079] It should be noted that the term "disconnection" as used above should be interpreted to include all situations where the oil in the second cavity 2312 no longer enters the second cooling flow path 2322. For example, this could mean that the second cavity 2312 is actually connected to the second cooling flow path 2322, but the oil fails to flow from the second cavity 2312 into the second cooling flow path 2322 due to other factors. For instance, if the oil level in the second cavity 2312 is low or the oil pressure is low, the oil cannot flow from the second cavity 2312 into the second cooling flow path 2322.

[0080] Continue reading Figure 3 In some embodiments of this application, the magnetic component 232 includes an iron core 2323 and a magnet assembly 2324. The iron core 2323 is sleeved on the outer peripheral surface of the rotating shaft 231, and a first cooling flow path 2321 is formed inside the iron core 2323. In this way, the rotor 23 can be cooled by cooling the iron core 2323.

[0081] In some embodiments, the iron core 2323 is provided with weight-reducing holes, which form a first cooling flow path 2321. In this way, the weight-reducing holes can be used as the flow path for the cooling medium, eliminating the need to separately machine the flow path on the iron core 2323, thus facilitating the machining of the iron core 2323.

[0082] In some embodiments, the iron core 2323 is provided with at least one receiving slot. The magnetic assembly 232 further includes a magnet assembly 2324, which is disposed in at least one receiving slot and connected to the iron core 2323. The magnet assembly 2324 cooperates with the coil winding 25 to drive the rotor 23 to rotate relative to the stator 24.

[0083] The magnet assembly 2324 defines a second cooling flow path 2322 between itself and the inner wall of the receiving tank.

[0084] The magnet assembly 2324 is connected to the iron core 2323, and a second cooling flow path 2322 is formed inside the magnet assembly 2324.

[0085] For ease of explanation, the following description will take the connection between the first cavity 2311 and the first cooling flow path 2321, and the connection between the second cavity 2312 and the second cooling flow path 2322 as an example.

[0086] When the vehicle 1000 is in motion, the oil in the second chamber 2312 can be controlled to prevent it from entering the second cooling flow path 2322. At this time, only the oil in the first chamber 2311 enters the first cooling flow path 2321 to cool the iron core 2323. Understandably, since no oil is injected into the second cooling oil path, the rotor 23 only needs to rotate with the oil in the first cooling flow path 2321. The load on the rotor 23 is small, thereby reducing oil churning losses.

[0087] When the vehicle 1000 is in the parking charging state, the oil in the second cavity 2312 can be controlled to enter the second cooling flow path 2322 in the magnet assembly 2324, so that the oil comes into direct contact with the magnet assembly 2324, so as to fully cool the magnet.

[0088] Thus, the rotor 23 of this application can adapt and adjust its internal oil circuit distribution according to different working conditions, which can ensure sufficient cooling of the iron core 2323 and the magnet assembly 2324, and reduce oil churning losses.

[0089] Continue reading Figure 3 In some embodiments of this application, the first cooling flow path 2321 and the second cooling flow path 2322 are parallel to the axial direction of the iron core 2323, and the second cooling flow path 2322 is located on the side of the first cooling flow path 2321 away from the rotating shaft 231.

[0090] Thus, the rotation radius of the oil in the second cooling flow path 2322 is larger than that of the oil in the first cooling flow path 2321. When the vehicle 1000 is in motion, the motor 20 is in the first operating mode, with oil flowing through the first cooling flow path 2321 and not flowing through the second cooling flow path 2322. According to the centrifugal force calculation formula, compared to the structure where the first cooling flow path 2321 is located on the side away from the rotating shaft 231, the centrifugal force generated by the oil is smaller when the first cooling flow path 2321 is located closer to the rotating shaft 231, which is beneficial to the stable operation of the rotating shaft 231.

[0091] In some embodiments of this application, the magnet assembly 2324 includes a magnet body, which is arranged radially along and connected to the iron core 2323, forming a second cooling flow path 2322 between the magnet body and the iron core 2323. In this way, after the oil enters the second cooling flow path 2322, it can directly contact the magnet body and the iron core 2323, absorbing heat from them, and cooperating with the first cooling flow path 2321 to achieve sufficient cooling of the rotor 23.

[0092] Continue reading Figure 3 and Figure 4 In some embodiments of this application, the rotating shaft 231 has a first liquid inlet 2313 and a second liquid inlet 2314 at opposite ends. The rotating shaft 231 also includes a separator 2315 disposed within the rotating shaft 231 to form a first cavity 2311 and a second cavity 2312. The first liquid inlet 2313 is connected to the first cavity 2311, and the second liquid inlet 2314 is connected to the second cavity 2312.

[0093] It should be noted that the aforementioned separator 2315 can be a sealing block, and the specific material can be rubber, silicone, or asbestos fiber, etc., so that the first cavity 2311 and the second cavity 2312 are not electrically connected to each other.

[0094] In this way, external oil enters the first cooling flow path 2321 through the first inlet 2313 via the first cavity 2311 to form an oil path, and enters the second cooling flow path 2322 through the second inlet 2314 via the second cavity 2312 to form another oil path. The two oil paths can operate independently, and the two oil paths can be controlled separately according to the different operating conditions of the rotor 23, thereby improving the utilization rate of cooling oil and the cooling effect.

[0095] Continue reading Figure 4 In some embodiments of this application, the rotating shaft 231 is further provided with a first connecting channel 2316 and a second connecting channel 2317 arranged axially at intervals. The first connecting channel 2316 connects the first cavity 2311 and the first cooling flow path 2321, and the second connecting channel 2317 connects the second cavity 2312 and the second cooling flow path 2322. It can be understood that the oil in the first cavity 2311 and the oil in the second cavity 2312 can, under the action of centrifugal force, enter the first cooling flow path 2321 through the first connecting channel 2316 and the second cooling flow path 2322 through the second connecting channel 2317, respectively.

[0096] Continue reading Figure 4In some embodiments of this application, the motor 20 further includes a first magnetic shielding baffle 261 and a second magnetic shielding baffle 262. The first magnetic shielding baffle 261 is disposed on one axial end face of the iron core 2323. A third connecting flow channel 2611 is formed between the first magnetic shielding baffle 261 and the iron core 2323. The first liquid inlet 2313, the first cavity 2311, the first connecting flow channel 2316, the third connecting flow channel 2611 and the first cooling flow path 2321 are connected in sequence.

[0097] The second magnetic shielding plate 262 is disposed on the other end face of the iron core 2323 along the axial direction. A fourth connecting flow channel 2621 is formed between the second magnetic shielding plate 262 and the iron core 2323. The second liquid inlet 2314, the second cavity 2312, the second connecting flow channel 2317, the fourth connecting flow channel 2621 and the second cooling flow path 2322 are connected in sequence.

[0098] Understandably, the first magnetic shielding baffle 261 and the second magnetic shielding baffle 262 are respectively set at opposite ends of the magnetic steel body along the axial direction, which can reduce the magnetic leakage phenomenon of the magnetic steel body, so that the magnetic field generated by the magnetic steel body can be concentrated on the effective working area of ​​the motor 20, thereby improving the magnetic field utilization rate and the electromagnetic conversion efficiency of the motor 20.

[0099] Furthermore, after the oil in the first cavity 2311 flows through the first connecting channel 2316 into the magnetic component 232, it can enter the first cooling path 2321 through the third connecting channel 2611. Similarly, after the oil in the second cavity 2312 flows through the second connecting channel 2317 into the magnetic component 232, it can enter the second cooling path 2322 through the fourth connecting channel 2621.

[0100] In some embodiments of this application, a control valve 28 can be provided in either the second connecting channel 2317 or the fourth connecting channel 2621 to control the connection or disconnection between the second cavity 2312 and the second cooling flow path 2322, thereby controlling whether the oil in the second cavity 2312 is injected into the second cooling flow path 2322.

[0101] In some other embodiments of this application, a control valve 28 can be provided outside the second oil inlet to control whether oil enters the second cavity 2312 and whether oil in the second cavity 2312 is injected into the second cooling flow path 2322. When oil no longer enters the second cavity 2312, the oil pressure in the second cavity 2312 is low and insufficient to force oil into the second cooling flow path 2322. At this time, the second cavity 2312 and the second cooling flow path 2322 can be considered disconnected. Conversely, when oil can enter the second cavity 2312 through the control valve 28 and the second oil inlet, the oil pressure in the second cavity 2312 is high and can force oil into the second cooling flow path 2322. At this time, the second cavity 2312 and the second cooling flow path 2322 can be considered connected. The specific location of the control valve 28 will be described in detail later in conjunction with other components in the motor 20.

[0102] In some embodiments, the control valve 28 may be connected to the housing 10 for easy securing of the control valve 28.

[0103] Continue reading Figure 4 In some embodiments of this application, the first magnetic shielding baffle 261 is provided with a first liquid outlet 2612, and the second magnetic shielding baffle 262 is provided with a second liquid outlet 2622. One end of the first liquid outlet 2612 is connected to the second cooling flow path 2322, and the other end of the first liquid outlet 2612 is adapted to connect to the return liquid channel 272; one end of the second liquid outlet 2622 is connected to the first cooling flow path 2321, and the other end of the second liquid outlet 2622 is adapted to connect to the return liquid channel 272.

[0104] In this way, the oil in the first cooling flow path 2321 flows from right to left, absorbing heat from the iron core 2323 during the flow, and is discharged into the return channel 272 through the second outlet 2622 on the second magnetic shielding baffle 262; the oil in the second cooling flow path 2322 flows from left to right, absorbing heat from the magnet body during the flow, and is discharged into the return channel 272 through the first outlet 2612 on the first magnetic shielding baffle 261.

[0105] Continue reading Figure 4 In some embodiments of this application, the housing 10 includes a liquid supply hole 273, a liquid supply channel 271, and a liquid return channel 272. One end of the liquid supply channel 271 is adapted to connect to the liquid supply hole 273, and the other end of the liquid supply channel 271 can be connected to the first liquid inlet 2313 and the second liquid inlet 2314. One end of the liquid return channel 272 is connected to the first liquid outlet 2612 and the second liquid outlet 2622, respectively, and the other end of the liquid return channel 272 is adapted to connect to the liquid supply hole 273.

[0106] Thus, the oil can flow into the supply channel 271 through the supply hole 273 on the housing 10, and then flow into the first inlet 2313 and the second inlet 2314 through the supply channel 271. After that, the oil flows in the rotor 23 along the above route to the first outlet 2612 and the second outlet 2622, and then collects again at the supply hole 273 through the return channel 272, forming a complete oil circuit circulation.

[0107] In some embodiments, one end of the return channel 272 is connected to the motor cavity 21, the outlet of the first cooling flow path 2321 is connected to the motor cavity 21, and the outlet of the second cooling flow path 2322 is connected to the motor cavity 21, so that one end of the return channel 272 is connected to the outlet of the first cooling flow path 2321 and the outlet of the second cooling flow path 2322 respectively.

[0108] It should be noted that the circulation of oil within the motor 20 can be powered by a power pump, which can be a centrifugal pump, gear pump, or vortex pump, etc.

[0109] Continue reading Figure 4 In some embodiments of this application, the motor 20 further includes a control valve 28, which is disposed in the liquid supply channel 271 and located between the liquid supply hole 273 and the second liquid inlet 2314, and controls the connection or disconnection between the liquid supply hole 273 and the second liquid inlet 2314.

[0110] In this way, when control valve 28 is open, oil cannot enter the second chamber 2312 through the supply channel 271 and the second inlet 2314. The oil pressure in the second chamber 2312 is low, and oil cannot be injected into the second cooling flow path 2322. When control valve 28 is open, oil can enter the second chamber 2312 through the supply channel 271 and the second inlet 2314. The oil pressure in the second chamber 2312 is high, which can force oil into the second cooling flow path 2322. Thus, whether to inject oil into the second cooling flow path 2322 can be selected according to different operating conditions of the motor 20, ensuring the cooling effect of the motor 20.

[0111] Continue reading Figure 4 In some embodiments of this application,

[0112] The fluid supply channel 271 includes a main pipe 2711, a first fluid supply line 2712, and a second fluid supply line 2713. The main pipe 2711 is connected to the fluid supply port 273. One end of the first fluid supply line 2712 is connected to the main pipe 2711, and the other end is connected to the first fluid inlet 2313. One end of the second fluid supply line 2713 is connected to the main pipe 2711, and the other end can be connected to the second fluid inlet 2314. Thus, the oil at the fluid supply port 273 can first enter the main pipe 2711, and then flow into the first fluid inlet 2313 through the first fluid supply line 2712 and into the second fluid inlet 2314 through the second fluid supply line 2713.

[0113] Continue reading Figure 4 In some embodiments of this application, the second cavity 2312 is located between the reducer cavity 22 and the first cavity 2311, and one end of the second cavity 2312 away from the first cavity 2311 is connected to the reducer cavity 22.

[0114] One of the first cavity 2311 and the second cavity 2312 is connected to the first cooling flow path 2321, and the other of the first cavity 2311 and the second cavity 2312 is connected to the second cooling flow path 2322. In this way, the cooling medium can flow between the reducer cavity 22 and the second cavity 2312 to cool the rotor 23 and the reduction assembly simultaneously.

[0115] Continue reading Figure 4 In some embodiments, the reduction assembly includes a main shaft 29, which is coaxially arranged with a rotating shaft 231. The main shaft 29 extends from one end of the second cavity 2312 into the second cavity 2312 and is drive-connected to the rotating shaft 231 (the part of the main shaft 29 that is drive-connected to the rotating shaft 231 is not shown in the figure). The main shaft 29 is provided with a first internal flow path 27132, which is connected to the second cavity 2312. In this way, the connection between the reducer cavity 22 and the second cavity 2312 can be realized through the first internal flow path 27132 without the need for additional connecting pipes, which facilitates the installation of the motor 20.

[0116] The housing 10 has a first liquid supply line 2712 connected to the first cavity 2311, and the reducer housing has a third liquid supply line connected to the first shaft internal flow path 27132. In this way, flow paths can be set on the housing 10 and the reducer housing without the need for additional connecting pipes, saving the space occupied by the motor 20 and facilitating the installation of the motor 20.

[0117] In some embodiments, the housing 10 further includes a second liquid supply line 2713. Specifically, the liquid supply channel 271 further includes a second liquid supply line 2713, which is connected to the second cavity 2312 via a third liquid supply line.

[0118] In this way, cooling medium can be introduced into the third supply pipe through the second supply pipe 2713, and then the cooling medium can enter the second cavity 2312 through the first shaft internal flow path 27132.

[0119] In some embodiments, the deceleration assembly further includes a drive shaft that is connected to the main shaft 29. The drive shaft has a second internal flow path 27131, and a second liquid supply pipe 2713, a second internal flow path 27131, a third liquid supply pipe, a first internal flow path 27132, and a second cavity 2312 are connected in sequence.

[0120] In this way, the cooling medium will flow through the drive shaft, reducer housing, main shaft 29 and second cavity 2312, thereby fully cooling the reduction assembly and improving the cooling effect of the reduction assembly.

[0121] In the embodiments of this application, the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0122] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0123] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0124] In this application embodiment, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, said acceptable deviation range being determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range for approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity may also be, for example, a deviation within 5°; "equal" includes absolute equality and approximate equality, wherein the acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0125] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0126] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electric motor, characterized in that, include: Shaft (231); as well as A magnetic component (232) is sleeved on the outer peripheral surface of the rotating shaft (231), and the magnetic component (232) is provided with a first cooling flow path (2321) and a second cooling flow path (2322); when the first cooling flow path (2321) is in a conducting state or a disconnected state, the second cooling flow path (2322) can switch between a conducting state and a disconnected state.

2. The motor according to claim 1, characterized in that, The motor has a first operating mode and a second operating mode; In the first operating mode, the motor is cooled by the cooling medium in the first cooling flow path (2321); In the second operating mode, the motor is cooled by the cooling medium in the second cooling flow path (2322).

3. The motor according to claim 2, characterized in that, In the second operating mode, the motor is cooled by the cooling medium in the first cooling flow path (2321) and the second cooling flow path (2322).

4. The motor according to claim 3, characterized in that, In the first working mode, the rotating shaft (231) rotates; in the second working mode, the rotating shaft (231) remains stationary.

5. The motor according to claim 1, characterized in that, The rotating shaft (231) is provided with a first cavity (2311) and a second cavity (2312) that are isolated from each other; The first cavity (2311) is connected to the first cooling flow path (2321), and the second cavity (2312) is connected to the second cooling flow path (2322).

6. The motor according to claim 5, characterized in that, The magnetic component (232) includes: The iron core (2323) is sleeved on the outer circumferential surface of the rotating shaft (231), and the first cooling flow path (2321) is formed inside the iron core (2323).

7. The motor according to claim 6, characterized in that, The iron core (2323) is provided with weight reduction holes; the weight reduction holes form the first cooling flow path (2321).

8. The motor according to claim 6, characterized in that, The iron core (2323) is provided with at least one receiving slot; The magnetic component (232) further includes a magnet component (2324), which is disposed in at least one of the receiving grooves and connected to the iron core (2323). The magnet component (2324) and the inner wall surface of the receiving groove define a second cooling flow path (2322).

9. The motor according to claim 1, characterized in that, The second cooling flow path (2322) is located on the side of the first cooling flow path (2321) away from the rotating shaft (231).

10. The motor according to claim 9, characterized in that, The motor has a first operating mode and a second operating mode; In the first working mode, the rotating shaft (231) rotates, and the motor is cooled only by the cooling medium in the first cooling flow path (2321); In the second working mode, the rotating shaft (231) is stationary, and the motor is cooled by the first cooling flow path (2321) and the second cooling flow path (2322).

11. The motor according to claim 5, characterized in that, The rotating shaft (231) has a first liquid inlet (2313) and a second liquid inlet (2314); the rotating shaft (231) further includes: A separator (2315) is disposed within the rotating shaft (231) to form a first cavity (2311) and a second cavity (2312). A first liquid inlet (2313) is connected to the first cavity (2311), and a second liquid inlet (2314) is connected to the second cavity (2312).

12. The motor according to claim 5, characterized in that, The rotating shaft (231) is provided with a first connecting channel (2316) and a second connecting channel (2317). The first connecting channel (2316) connects the first cavity (2311) and the first cooling flow path (2321), and the second connecting channel (2317) connects the second cavity (2312) and the second cooling flow path (2322).

13. The motor according to claim 12, characterized in that, The rotating shaft (231) has a first liquid inlet (2313) and a second liquid inlet (2314); the magnetic assembly (232) further includes: An iron core (2323) is sleeved on the outer circumferential surface of the rotating shaft (231), and a first cooling flow path (2321) and a second cooling flow path (2322) are formed inside the iron core (2323); A first magnetic shielding plate (261) is disposed on one axial end face of the iron core (2323). A third connecting flow channel (2611) is formed between the first magnetic shielding plate (261) and the iron core (2323). The first liquid inlet (2313), the first cavity (2311), the first connecting flow channel (2316), the third connecting flow channel (2611) and the first cooling flow path (2321) are connected in sequence. The second magnetic shielding plate (262) is disposed on the other side end face of the iron core (2323) along the axial direction. The second magnetic shielding baffle (262) and the iron core (2323) form a fourth connecting flow channel (2621). The second liquid inlet (2314), the second cavity (2312), the second connecting flow channel (2317), the fourth connecting flow channel (2621) and the second cooling flow path (2322) are connected in sequence.

14. The motor according to claim 13, characterized in that, The first magnetic shielding baffle (261) is provided with a first liquid outlet (2612), and the second magnetic shielding baffle (262) is provided with a second liquid outlet (2622); One end of the first liquid outlet (2612) is connected to the second cooling flow path (2322), and the other end of the first liquid outlet (2612) is adapted to be connected to the return liquid channel (272); one end of the second liquid outlet (2622) is connected to the first cooling flow path (2321), and the other end of the second liquid outlet (2622) is adapted to be connected to the return liquid channel (272).

15. The motor according to any one of claims 1-14, characterized in that, Includes a housing (10), the housing (10) having: Liquid supply port (273); A liquid supply channel (271) is provided, one end of which is adapted to connect to the liquid supply hole (273), and the other end of which is connected to the inlet of the first cooling flow path (2321) and the inlet of the second cooling flow path (2322). as well as The return channel (272) is connected at one end to the outlet of the first cooling flow path (2321) and the outlet of the second cooling flow path (2322), and at the other end to the supply hole (273).

16. The motor according to claim 15, characterized in that, The housing (10) forms a motor cavity (21) for housing the rotating shaft (231) and the magnetic component (232). One end of the return channel (272) is connected to the motor cavity (21), the outlet of the first cooling flow path (2321) is connected to the motor cavity (21), and the outlet of the second cooling flow path (2322) is connected to the motor cavity (21).

17. The motor according to claim 15, characterized in that, The rotating shaft (231) has a second liquid inlet (2314) communicating with the second cooling flow path (2322); the motor further includes: A control valve (28) is provided in the liquid supply channel (271) and located between the liquid supply hole (273) and the second liquid inlet (2314), controlling the liquid supply hole (273) and the second liquid inlet (2314) to be connected or disconnected.

18. The motor according to claim 17, characterized in that, The rotating shaft (231) also has a first liquid inlet (2313), a first connecting flow channel (2316), and a second connecting flow channel (2317); the magnetic component (232) also includes an iron core (2323), a first magnetic shielding baffle (261), and a second magnetic shielding baffle (262); the first magnetic shielding baffle (261) is provided with a first liquid outlet (2612), and the second magnetic shielding baffle (262) is provided with a second liquid outlet (2622); A third connecting channel (2611) is formed between the first magnetic shielding baffle (261) and the iron core (2323), and a fourth connecting channel (2621) is formed between the second magnetic shielding baffle (262) and the iron core; the third connecting channel (2611) connects the first connecting channel (2316) and the first cooling channel (2321), and the fourth connecting channel (2621) connects the second connecting channel (2317) and the second cooling channel (2322).

19. The motor according to claim 18, characterized in that, The liquid supply channel (271) includes: Main pipeline (2711), which is connected to the liquid supply port (273); The first liquid supply line (2712) is connected at one end to the main line (2711) and at the other end to the first liquid inlet (2313).

20. The motor according to claim 19, characterized in that, The liquid supply channel (271) also includes: The second liquid supply line (2713) is connected at one end to the main line (2711) and at the other end to the second liquid inlet (2314).

21. A rotor, characterized in that, include: A rotating shaft (231) having a first cavity (2311) and a second cavity (2312) that are isolated from each other; as well as A magnetic component (232) is sleeved on the outer peripheral surface of the rotating shaft (231), and the magnetic component (232) is provided with a first cooling flow path (2321) and a second cooling flow path (2322). The first cavity (2311) is connected to the first cooling flow path (2321), and the second cavity (2312) is connected to the second cooling flow path (2322).

22. A drive assembly, characterized in that, Includes the motor as described in any one of claims 1-20.

23. The drive assembly according to claim 22, characterized in that, It also includes a reducer housing (27133) and a reduction gear assembly; The motor includes a housing (10), which forms a motor cavity (21) for housing the rotating shaft (231) and the magnetic component. The reducer housing (27133) forms a reducer cavity (22), and the reducer component is housed in the reducer cavity (22). The rotating shaft (231) is connected to the reducer component in a transmission connection.

24. The drive assembly according to claim 23, characterized in that, The rotating shaft (231) is provided with a first cavity (2311) and a second cavity (2312) arranged sequentially along the axial direction and isolated from each other. The second cavity (2312) is located between the reducer cavity (22) and the first cavity (2311). The end of the second cavity (2312) away from the first cavity (2311) is connected to the reducer cavity (22). The first cavity (2311) is connected to the first cooling flow path (2321), and the second cavity (2312) is connected to the second cooling flow path (2322).

25. The drive assembly according to claim 24, characterized in that, The deceleration assembly includes a main shaft (29), which is coaxially arranged with the rotating shaft (231). The main shaft (29) extends from one end of the second cavity (2312) into the second cavity (2312) and is connected to the rotating shaft (231) in a transmission manner. The main shaft (29) is provided with a first internal flow path (27132), which is connected to the second cavity (2312). The housing (10) has a first liquid supply line (2712) communicating with the first cavity (2311), and the reducer housing (27133) has a third liquid supply line communicating with the first shaft internal flow path (27132).

26. The drive assembly according to claim 25, characterized in that, The housing (10) also has: The second liquid supply line (2713) is connected to the second cavity (2312) through the third liquid supply line.

27. The drive assembly according to claim 26, characterized in that, The deceleration assembly also includes a drive shaft that is connected to the main shaft (29). The drive shaft has a second internal flow path (27131). The second liquid supply pipe (2713), the second internal flow path (27131), the third liquid supply pipe, the first internal flow path (27132), and the second cavity (2312) are connected in sequence.

28. The drive assembly according to claim 26, characterized in that, The housing (10) also has: Liquid supply hole (273), the first liquid supply line (2712) and the second liquid supply line (2713) are both connected to the liquid supply hole (273).

29. The drive assembly according to claim 23, characterized in that, The number of the motor, the reducer housing (27133), and the reduction assembly are all two and correspond one-to-one; The two motor shafts (231) are coaxially arranged, and the two reducer housings (27133) are spaced apart along the axial direction of the shafts (231). The two motors are located between the two reducer housings (27133), and the motor housing (10) and the adjacent reducer housing (27133) form the reducer cavity (22).

30. The drive assembly according to claim 23, characterized in that, The housing (10) is also provided with: The first main pipeline (13) and the second main pipeline (14) are located between the two motors, and the first main pipeline (13) and the second main pipeline (14) are adapted to supply liquid to the two motors respectively; The first main road (13) and the second main road (14) are arranged opposite each other along a first direction, and the extension direction of the first main road (13) and the extension direction of the second main road (14) are perpendicular to the first direction.

31. A vehicle, characterized in that, It includes the motor according to any one of claims 1-20, the rotor according to claim 21, or the drive assembly according to any one of claims 22-30.

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