Electric machine and vehicle

Abstract

The application relates to an electric machine and a vehicle, the electric machine comprising a rotating shaft, a stator assembly, a rotor assembly, a first bearing and a first oil blocking piece; the rotating shaft is provided with an oil channel and a first oil outlet, one end of the first oil outlet being communicated with the oil channel; the stator assembly is annularly arranged on the outer periphery of the rotating shaft, an annular gap being formed between the stator assembly and the rotating shaft, the other end of the first oil outlet being communicated with the annular gap; the rotor assembly is sleeved on the rotating shaft; the first bearing is located in the annular gap and arranged between the rotating shaft and the stator assembly; and the first oil blocking piece is arranged at a magnetic gap between the stator assembly and the rotor assembly. According to the application, the first oil blocking piece is arranged at the magnetic gap, so that the lubricating oil flowing along the radial direction of the rotating shaft to the magnetic gap is blocked by the first oil blocking piece, thereby avoiding the lubricating oil flowing outward along the radial direction of the rotating shaft to the space between the stator assembly and the rotor assembly. In this way, the resistance of the lubricating oil to the rotation of the rotor assembly can be reduced, thereby reducing the oil stirring loss and improving the performance of the electric machine.

Description

Technical Field

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

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque, serving as a power source for various mechanical devices. An electric motor includes a housing, a rotating shaft rotatably mounted within the housing, a rotor assembly mounted within the housing and connected to the shaft, and a stator assembly fixed within the housing. When the stator assembly is energized, it generates a magnetic field. Under the influence of this magnetic field, the rotor assembly generates electromagnetic torque and rotates, thus outputting rotational power. Electric motors can be classified into axial flux motors and radial flux motors based on the direction of the magnetic field. In an axial flux motor, the stator and rotor assemblies are arranged radially spaced along the shaft.

[0003] In related technologies, bearings are required to support the stator assembly and rotor shaft of an axial flux motor. To improve bearing reliability, lubrication channels are provided. However, lubricating oil can easily enter the magnetic gap (also known as the air gap) between the stator and rotor assemblies. Once inside the magnetic gap, the rotor, due to friction, drives the lubricating oil to rotate. Since the lubricating oil is viscous and comes into contact with the stator assembly, it increases the resistance to rotor rotation, causing oil churning losses and ultimately reducing motor performance. Summary of the Invention

[0004] This application provides an electric motor that prevents lubricating oil from entering the magnetic gap between the stator assembly and the rotor assembly, thereby reducing the oil churning loss of the motor and at least solving the above-mentioned technical problems.

[0005] To achieve the above objectives, according to a first aspect of this application, an electric motor is provided, comprising a rotating shaft, a stator assembly, a rotor assembly, a first bearing, and a first oil baffle; the rotating shaft has an oil passage and a first oil outlet, one end of the first oil outlet communicating with the oil passage; the stator assembly is annularly disposed around the outer periphery of the rotating shaft, forming an annular gap between the stator assembly and the rotating shaft, the other end of the first oil outlet communicating with the annular gap; the rotor assembly is sleeved on the rotating shaft; the first bearing is located within the annular gap and disposed between the rotating shaft and the stator assembly; the first oil baffle is disposed at the magnetic gap between the stator assembly and the rotor assembly.

[0006] Optionally, in the radial direction of the rotating shaft, the first oil baffle is located at the radially inner opening of the magnetic gap.

[0007] Optionally, the rotor assembly includes a rotor core and rotor magnets; the rotor core is sleeved on the shaft; the rotor magnets are located on the side of the rotor core closer to the stator assembly; and the first oil baffle is located on the radially inner side of the rotor magnets.

[0008] Optionally, the first oil baffle is integrated with the rotor core.

[0009] Optionally, the stator assembly includes a stator core and a stator winding; the stator core is annularly disposed on the outer periphery of the rotating shaft, and an annular gap is formed between the stator core and the rotating shaft; the stator winding is disposed on the stator core and is disposed opposite to the rotor magnet along the axial direction of the rotating shaft.

[0010] Optionally, a receiving groove is provided on the side of the stator core facing the rotor core, and part of the first oil baffle is received in the receiving groove.

[0011] Optionally, there are two rotor assemblies and two first oil baffles. Along the axial direction of the shaft, the two rotor assemblies are located on both sides of the stator assembly, and the two first oil baffles are located on both sides of the stator assembly and between the stator assembly and the adjacent rotor assembly.

[0012] Optionally, there are two first bearings, which are spaced apart on the shaft along the axial direction of the shaft.

[0013] Optionally, the end of the first oil outlet furthest from the oil passage is located between the two first bearings.

[0014] Optionally, the motor further includes a second oil baffle; the first oil baffle is connected to the rotor assembly, and a first gap is formed between the first oil baffle and the stator assembly in the axial direction of the shaft; the second oil baffle is connected to the stator assembly, and a second gap is formed between the second oil baffle and the rotor assembly in the axial direction of the shaft; a third gap is formed between the first oil baffle and the second oil baffle in the radial direction of the shaft; wherein, in the axial direction of the shaft, the first gap and the second gap are spaced apart, and the two ends of the third gap are respectively connected to the first gap and the second gap.

[0015] Optionally, the second oil baffle is located at one axial end of the first bearing, and the first oil outlet is located at the other axial end of the first bearing. An oil outlet channel for lubricating oil to pass through is formed between the first oil baffle and the rotating shaft.

[0016] Optionally, the second oil baffle is an annular structure, the second oil baffle is disposed on the radial inner side of the stator assembly, the second oil baffle is attached to the outer ring of the first bearing, and the inner circumferential surface of the second oil baffle is flush with the inner circumferential surface of the outer ring.

[0017] Optionally, the motor also includes an inner ring body, which is sleeved on the rotating shaft. The second oil baffle and the inner ring body are opposite each other in the radial direction of the rotating shaft. The outer circumferential surface of the inner ring body is flush with the outer circumferential surface of the inner ring of the first bearing. The oil outlet channel is formed by the second oil baffle and the inner ring body.

[0018] Optionally, the inner ring body and the rotating shaft are integrated.

[0019] Optionally, the second oil stop component is integrated with the stator assembly.

[0020] Optionally, the motor also includes a housing and a second bearing. The housing has a mounting cavity and an oil return port communicating with the mounting cavity. The shaft, stator assembly and rotor assembly are disposed in the mounting cavity. The second bearing is disposed between the shaft and the housing. A second oil outlet is provided on the shaft. One end of the second oil outlet is communicating with an oil passage, and the other end is configured to discharge oil to the second bearing.

[0021] Optionally, the axis of the second oil outlet forms an acute angle with the axis of the rotating shaft.

[0022] Optionally, the housing has an oil return chamber located between the oil return port and the mounting cavity. The oil return chamber is connected to the oil return port, and the mounting cavity is connected to the oil return chamber through an oil return through hole.

[0023] Optionally, the housing includes a first end cover, a second end cover, and an annular housing; the first end cover is rotatably fitted to one end of a rotating shaft via a second bearing; the second end cover is rotatably fitted to the other end of a rotating shaft via a second bearing; both ends of the annular housing are connected to the first end cover and the second end cover respectively to define an installation cavity; the stator assembly is connected to the inner circumferential surface of the annular housing; wherein, at least one of the first end cover, the second end cover, and the annular housing is provided.

[0024] According to a second aspect of this application, a vehicle is provided that includes the aforementioned motor.

[0025] In this embodiment, by providing a first oil-blocking component in the magnetic gap, the lubricating oil flowing radially towards the magnetic gap along the shaft is blocked by the first oil-blocking component, thereby preventing the lubricating oil from flowing radially outward between the stator assembly and the rotor assembly. This reduces the resistance of the lubricating oil to the rotation of the rotor assembly, thereby reducing oil churning losses and improving motor performance.

[0026] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying 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.

[0028] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0029] Figure 1This is a schematic diagram of the internal structure of the motor provided in an exemplary embodiment of this disclosure;

[0030] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0031] Figure 3 yes Figure 2 Enlarged view of point B in the middle;

[0032] Figure 4 This is a schematic diagram of the longitudinal section structure of the rotating shaft provided in an exemplary embodiment of this disclosure;

[0033] Figure 5 This is a schematic diagram of the rotor assembly provided in an exemplary embodiment of this disclosure;

[0034] Figure 6 This is a schematic cross-sectional view of the rotor assembly provided in an exemplary embodiment of this disclosure;

[0035] Figure 7 This is a schematic diagram of the rotor core provided in an exemplary embodiment of this disclosure;

[0036] Figure 8 This is a schematic diagram of the structure of the magnetic ring provided in an exemplary embodiment of this disclosure;

[0037] Figure 9 yes Figure 8 Enlarged view of point C in the middle;

[0038] Figure 10 yes Figure 1 Enlarged diagram of point D in the middle.

[0039] Explanation of reference numerals in the attached figures:

[0040] 111-Second oil outlet, 112-Third oil outlet; 113-First oil outlet, 114-First through hole, 115-Second through hole, 116-Third through hole; 117-Flanged opening;

[0041] 2-Shaft;

[0042] 22-oil passage; 24-first inner cavity; 251-first intermediate hole;

[0043] 31-Rotor assembly;

[0044] 311-Rotor core; 3111-First annular groove; 3112-Annular track; 3113-Second intermediate hole; 3114-Protrusion;

[0045] 312-Magnetic guide ring; 3121-Mounting groove; 3122-Oil groove; 3123-Card slot;

[0046] 313 - Rotor magnet;

[0047] 4-Motor; 41-Second bearing; 411-Second inner ring; 412-Second outer ring; 413-Ring seal; 414-Ball bearing;

[0048] 42 - First bearing;

[0049] 43-Outer casing; 431-First end cap; 432-Second end cap; 433-Annular casing; 434-Mounting cavity; 435-Oil return port; 436-Oil return chamber; 438-Oil return through hole;

[0050] 44-Stator assembly; 441-Stator core; 442-Stator winding;

[0051] 45-Inner ring body; 46-Second oil baffle; 47-Intermediate inner ring; 471-Oil passage hole; 48-Intermediate outer ring; 491-Receiving groove; 492-First oil baffle;

[0052] 50 - Annular gap; 51 - First gap; 52 - Second gap; 53 - Third gap;

[0053] 60 - Magnetic gap. Detailed Implementation

[0054] The technical solutions of 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 them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0055] The following combination Figures 1 to 10 The present application provides a detailed description of an electric motor 4 and a vehicle according to embodiments thereof.

[0056] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the internal structure of the motor 4 provided in an exemplary embodiment of this disclosure. Figure 2 yes Figure 1 Enlarged diagram of point A in the middle. Figure 3 yes Figure 2Enlarged schematic diagram at point B. In a first aspect, embodiments of this application provide a motor 4. The motor 4 includes a rotating shaft 2, a stator assembly 44, a rotor assembly 31, a first bearing 42, and a first oil baffle 492. The rotating shaft 2 has an oil passage 22 and a first oil outlet 113. One end of the first oil outlet 113 communicates with the oil passage 22. The stator assembly 44 is arranged around the outer periphery of the rotating shaft 2, forming an annular gap 50 between the stator assembly 44 and the rotating shaft 2. The other end of the first oil outlet 113 communicates with the annular gap 50. The rotor assembly 31 is sleeved on the rotating shaft 2. The first bearing 42 is located within the annular gap 50 and is disposed between the rotating shaft 2 and the stator assembly 44. The first oil baffle 492 is disposed at a magnetic gap 60 between the stator assembly 44 and the rotor assembly 31. The other end of the first oil outlet 113 communicates with the annular gap 50.

[0057] It is understood that the first oil-blocking component 492 has a ring structure. The first oil-blocking component 492 can be connected to one of the stator assembly 44 and the rotor assembly 31, with the other having a clearance fit. Alternatively, the first oil-blocking component 492 can be connected to one of the stator assembly 44 and the rotor assembly 31, and have rolling or rotational contact with the other; for example, the first oil-blocking component 492 can be an oil seal.

[0058] It is understandable that the first oil stop component 492 is positioned close to the rotating shaft 2.

[0059] It is understandable that a first bearing 42 is fitted on the rotating shaft 2 to support the inner diameter side of the stator assembly 44 through the rotating shaft 2 and the first bearing 42, so as to avoid the problem of the stator assembly 44 shifting due to axial magnetic pull.

[0060] Specifically, the first bearing 42 is an angular contact ball bearing.

[0061] It is understood that this structural design in this embodiment can use lubricating oil to lubricate the first bearing 42. Compared with grease lubrication, oil lubrication has smoother flow within the gap of the first bearing 42 and is more effective in reducing the resistance of the first bearing 42. This is beneficial for increasing the rotational speed of the motor 4, thereby expanding the application range of the motor 4.

[0062] It is understandable that one end of the oil passage 22 is connected to the oil supply pipeline so that the lubricating oil in the oil tank can be sent into the oil passage 22 by the oil pump.

[0063] It is understandable that the rotation of the shaft 2 generates centrifugal force on the lubricating oil in the oil passage 22. Therefore, the lubricating oil entering the oil passage 22 flows into the annular gap 50 through the first oil outlet 113 under the action of centrifugal force, lubricating and cooling the first bearing 42 to reduce the resistance of the first bearing 42 to the rotation of the shaft 2, thereby ensuring that the first bearing 42 is in good working condition and facilitating the long-term stable rotation of the shaft 2. The lubricating oil flowing into the annular gap 50 moves along the relative surface between the stator assembly 44 and the shaft 2 towards the magnetic gap 60 between the stator assembly 44 and the rotor assembly 31.

[0064] In this embodiment, by providing a first oil-blocking component 492 in the magnetic gap 60, the lubricating oil flowing radially towards the magnetic gap 60 along the rotating shaft 2 is blocked by the first oil-blocking component 492, thereby preventing the lubricating oil from flowing radially outward along the rotating shaft 2 between the stator assembly 44 and the rotor assembly 31. This reduces the resistance of the lubricating oil to the rotation of the rotor assembly 31, thereby reducing oil churning losses and improving the performance of the motor 4, enabling it to operate stably at high speeds.

[0065] Please see Figures 1 to 3 In some embodiments, the first oil-blocking member 492 is located at the radially inner opening of the magnetic gap 60 in the radial direction of the rotating shaft 2. This arrangement, with the first oil-blocking member 492 positioned close to the rotating shaft 2, effectively prevents lubricating oil from entering the stator assembly 44 and the rotor assembly 31, further reducing oil churning losses.

[0066] Please see Figures 1 to 3 In some embodiments, the rotor assembly 31 includes a rotor core 311 and a rotor magnet 313. The rotor core 311 is sleeved on the shaft 2. The rotor magnet 313 is located on the side of the rotor core 311 closer to the stator assembly 44. A first oil baffle 492 is located on the radially inner side of the rotor magnet 313.

[0067] It is understandable that the rotor magnet 313 will generate magnetic field lines, which will pass through the magnetic gap 60.

[0068] Based on this, in this embodiment, the above-mentioned settings allow the first oil-blocking component 492 to block the lubricating oil on the side of the rotor magnet 313 near the rotating shaft 2, thereby preventing the lubricating oil from entering the magnetic gap 60 through which the magnetic field lines of the rotor magnet 313 pass, thus ensuring that the permeability of the magnetic gap 60 remains unchanged, thereby improving the uniformity of the magnetic field distribution and thus improving the performance of the motor 4.

[0069] Please see Figure 3In some embodiments, the first oil baffle 492 is integrally formed with the rotor core 311. This reduces the number of parts in the motor 4, thereby improving the assembly efficiency of the motor 4. In addition, connecting the first oil baffle 492 and the rotor core 311 as a single unit increases the strength of the connection between the first oil baffle 492 and the motor 4, thereby improving the reliability of the motor 4 structure.

[0070] Please see Figure 1 In some embodiments, the stator assembly 44 includes a stator core 441 and a stator winding 442. The stator core 441 is arranged around the outer periphery of the rotating shaft 2, and an annular gap 50 is formed between the stator core 441 and the rotating shaft 2. The stator winding 442 is disposed on the stator core 441 and is arranged opposite to the rotor magnet 313 along the axial direction of the rotating shaft 2. This makes the overall structure of the stator assembly 44 simple and easy to assemble.

[0071] It is understandable that the stator core 441 provides a low magnetic resistance channel for the magnetic field generated by the stator winding 442, so that the magnetic field generated by the stator winding 442 can pass through the magnetic gap 60 and act on the rotor magnet 313.

[0072] Please see Figure 3 In some embodiments, a receiving groove 491 is provided on the side of the stator core 441 facing the rotor core 311. A portion of the first oil baffle 492 is accommodated in the receiving groove 491.

[0073] It is understandable that the first oil-blocking component 492 and the receiving groove 491 are in clearance fit.

[0074] In this embodiment, through the above-described configuration, a tortuous channel is formed by the first oil-blocking component 492 and the receiving groove 491. This causes the lubricating oil to undergo multiple throttling processes as it flows within the gap between the first oil-blocking component 492 and the receiving groove 491. Each throttling process reduces the pressure and slows the flow rate of the lubricating oil, thus preventing it from bypassing the first oil-blocking component 492 and flowing into the magnetic gap 60. This improves the oil-blocking effect of the first oil-blocking component 492.

[0075] Please see Figure 1 In some embodiments, there are two rotor assemblies 31 and two first oil baffles 492. Along the axial direction of the shaft 2, the two rotor assemblies 31 are located on opposite sides of the stator assembly 44. The two first oil baffles 492 are located on opposite sides of the stator assembly 44, and between the stator assembly 44 and the adjacent rotor assembly 31. This makes the motor 4 a single-stator, dual-rotor structure.

[0076] Specifically, each first oil baffle 492 is located between the stator assembly 44 and the rotor assembly 31 adjacent to the first oil baffle 492.

[0077] In this embodiment, the above-described configuration allows the axial magnetic pull forces on the rotor assemblies 31 on both sides of the stator assembly 44 to cancel each other out, thereby solving the problem of axial force imbalance in a single rotor structure. This helps reduce the load on the motor 4 bearings, decrease wear and vibration, and improve the stability and reliability of the motor 4, thus extending its service life.

[0078] Please see Figure 1 and Figure 2 In some embodiments, there are two first bearings 42. The two first bearings 42 are spaced apart on the rotating shaft 2 along the axial direction of the rotating shaft 2. In this way, by supporting the stator assembly 44 with multiple first bearings 42, the stability of the support of the rotating shaft 2 on the stator assembly 44 can be improved, and the force distribution of the stator assembly 44 can be improved, which is beneficial to improving the performance of the motor 4.

[0079] Specifically, when the first bearing 42 is an angular contact ball bearing, the use of angular contact ball bearings in pairs enables it to withstand bidirectional axial loads, which is beneficial to improving the structural stability and reliability of the motor 4.

[0080] Please see Figure 1 and Figure 2 In some embodiments, the end of the first oil outlet 113 furthest from the oil passage 22 is located between the two first bearings 42. In this way, the two first bearings 42 can be lubricated simultaneously through the first oil outlet 113, which helps to improve the uniformity and consistency of lubrication of the two first bearings 42.

[0081] Please see Figure 3 In some embodiments, the motor 4 further includes a second oil baffle 46. A first oil baffle 492 is connected to the rotor assembly 31. A first gap 51 is formed between the first oil baffle 492 and the stator assembly 44 in the axial direction of the shaft 2. A second oil baffle 46 is connected to the stator assembly 44. A second gap 52 is formed between the second oil baffle 46 and the rotor assembly 31 in the axial direction of the shaft 2, and a third gap 53 is formed between the first oil baffle 492 and the second oil baffle 46. The first gap 51 and the second gap 52 are spaced apart in the axial direction of the shaft 2. The two ends of the third gap 53 communicate with the first gap 51 and the second gap 52 in the axial direction of the shaft 2, respectively.

[0082] In this embodiment, through the above-described configuration, a tortuous channel is formed by the first oil-blocking component 492 and the second oil-blocking component 46. This causes the lubricating oil to undergo multiple throttling processes as it flows within the first gap 51, the second gap 52, and the third gap 53. Each throttling process reduces the pressure and slows the flow rate of the lubricating oil, thus preventing it from bypassing the first oil-blocking component 492 and the second oil-blocking component 46 and flowing into the magnetic gap 60. This improves the oil-blocking effect, reducing oil churning losses and enhancing the performance of the motor 4.

[0083] Please see Figure 2 and Figure 3 In some embodiments, the second oil baffle 46 is disposed at one axial end of the first bearing 42. The first oil outlet 113 is located at the other axial end of the first bearing 42. An oil outlet channel for lubricating oil to pass through is formed between the first oil baffle 492 and the rotating shaft 2. In this way, during the process of lubricating the first bearing 42, the flow of lubricating oil to the magnetic gap 60 can also be hindered by the first bearing 42, thereby reducing the amount of lubricating oil flowing into the magnetic gap 60. This effectively prevents lubricating oil from bypassing the first oil baffle 492 and the second oil baffle 46 and flowing into the magnetic gap 60. This improves the oil blocking effect, which helps to reduce oil churning losses and improve the performance of the motor 4.

[0084] Please see Figure 2 and Figure 3 In some embodiments, the second oil baffle 46 is an annular structure. The second oil baffle 46 is disposed radially inside the stator assembly 44. The second oil baffle 46 is fitted against the outer ring of the first bearing 42. The inner circumferential surface of the second oil baffle 46 is flush with the inner circumferential surface of the outer ring. This ensures that the contact surfaces between the second oil baffle 46 and the outer ring of the first bearing 42 are of equal size, thereby improving the uniformity of force distribution between them and preventing stress concentration.

[0085] Specifically, one end face of the second oil baffle 46 is in contact with one end face of the outer ring of the first bearing 42.

[0086] Please see Figure 2 and Figure 3 In some embodiments, the motor 4 further includes an inner ring body 45. The inner ring body 45 is sleeved on the rotating shaft 2. The second oil baffle 46 and the inner ring body 45 are opposite each other in the radial direction of the rotating shaft 2. The outer peripheral surface of the inner ring body 45 is flush with the outer peripheral surface of the inner ring of the first bearing 42. The oil outlet channel is formed by the enclosing of the second oil baffle 46 and the inner ring body 45. In this way, the contact surface between the inner ring body 45 and the inner ring of the first bearing 42 can be made to be the same size, thereby improving the uniformity of force between the inner ring body 45 and the inner ring of the first bearing 42, and avoiding stress concentration.

[0087] In some embodiments, the inner ring 45 is integrally formed with the rotating shaft 2. This reduces the number of parts in the motor 4, thereby improving the assembly efficiency of the motor 4.

[0088] In some embodiments, the second oil baffle 46 is integrally formed with the stator assembly 44. This reduces the number of parts in the motor 4, thereby improving the assembly efficiency of the motor 4.

[0089] It is understood that the second oil baffle 46 and the inner ring 45 are also used to fix the first bearing 42. Specifically, when there are two first bearings 42, along the axial direction of the shaft 2, the end of the inner ring of the first bearing 42 away from the first oil baffle 492 abuts against the shaft 2. One end of the inner ring 45 abuts against the end of the inner ring of the adjacent first bearing 42, and the other end abuts against the adjacent rotor assembly 31. In this way, the first bearing 42 can be fixed along the axial direction of the shaft 2.

[0090] The two first bearings 42 can abut against each other or be abutted by other rings.

[0091] For example, the inner ring 45 is a heat-shrink ring.

[0092] One end of the second oil baffle 46 abuts against the end of the outer ring of the adjacent first bearing 42, and the outer peripheral surface of the second oil baffle 46 is connected to the inner peripheral surface of the stator assembly 44. The stator assembly 44 is fixed to the housing 43 of the motor 4. In this way, the first bearing 42 can be fixed along the axial direction of the shaft 2.

[0093] For example, the second oil stop 46 is a cold-pressed ring.

[0094] Please see Figure 2 In some embodiments, the motor 4 further includes an intermediate inner ring 47. The intermediate inner ring 47 is located between the two first bearings 42. The intermediate inner ring 47 is sleeved on the rotating shaft 2, and its two ends abut against the ends of the inner rings of the two first bearings 42, respectively. An oil passage hole 471 is provided on the intermediate inner ring 47, and the oil passage hole 471 communicates with the first oil outlet 113. In this way, the two first bearings 42 can be axially pressed together by adjusting the axial dimension of the intermediate inner ring 47, thereby solving the problem of difficult installation of the first bearings 42 due to machining and assembly.

[0095] For example, the middle inner ring 47 is a steel sleeve.

[0096] It is understandable that the lubricating oil thrown out through the first oil outlet 113 enters the end of the first bearing 42 through the oil passage 471 to lubricate the first bearing 42.

[0097] Please see Figure 2 The motor 4 also includes an intermediate outer ring 48, which is located between the two first bearings 42. The outer circumferential surface of the intermediate outer ring 48 is connected to the inner circumferential surface of the stator assembly 44. Both ends of the intermediate outer ring 48 abut against the ends of the outer rings of the two first bearings 42, respectively. Thus, by adjusting the axial dimensions of the intermediate inner ring 47 and the intermediate outer ring 48, the two first bearings 42 can be axially pressed together, thereby solving the problem of difficult installation of the first bearings 42 due to machining errors, assembly errors, etc.

[0098] For example, the middle outer ring 48 is a steel sleeve.

[0099] Please see Figure 1 In some embodiments, the motor 4 further includes a housing 43 and a second bearing 41. The housing 43 has a mounting cavity 434 and an oil return port 435 communicating with the mounting cavity 434. The rotating shaft 2, stator assembly 44, and rotor assembly 31 are disposed in the mounting cavity 434. The second bearing 41 is disposed between the rotating shaft 2 and the housing 43. A second oil outlet 111 is provided on the rotating shaft 2, one end of which communicates with the oil passage 22, and the other end is configured to discharge oil to the second bearing 41.

[0100] It is understood that the second bearing 41 is sleeved on the rotating shaft 2, and the inner ring of the second bearing 41 is interference-fitted with the rotating shaft 2, and the outer ring of the second bearing 41 is interference-fitted with the housing 43 of the motor 4.

[0101] There are two second bearings 41, which are respectively disposed at both ends of the rotating shaft 2. Correspondingly, a second oil outlet 111 is provided at both ends of the rotating shaft 2.

[0102] For example, the second oil outlet 111 can be a straight hole, an L-shaped hole, or a hole extending along a curve.

[0103] Specifically, the second bearing 41 is a deep groove ball bearing.

[0104] Specifically, the outer peripheral surface of the stator assembly 44 is fixedly fitted to the inner peripheral surface of the housing 43 by potting or interference fit, and the inner peripheral surface of the stator assembly 44 is fitted to the outer ring of the first bearing 42, the outer peripheral surface of the second oil baffle 46 and the outer peripheral surface of the intermediate outer ring 48.

[0105] It is understandable that after the lubricating oil enters the oil passage 22, it flows towards the circumference of the shaft 2 due to centrifugal force generated by the rotation of the shaft 2. Under the action of centrifugal force, part of the lubricating oil enters the annular gap 50 through the first oil outlet 113 to lubricate the first bearing 42, thereby reducing the resistance of the first bearing 42 to the rotation of the shaft 2. The other part enters the second oil outlet 111 and is thrown from the second oil outlet 111 to the second bearing 41 by centrifugal force to lubricate the second bearing 41, thereby reducing the resistance of the second bearing 41 to the rotation of the shaft 2.

[0106] In this embodiment, by providing a second oil outlet 111, the lubricating oil in the oil passage 22 can be guided to the second bearing 41 through the second oil outlet 111, thereby improving the lubrication effect of the second bearing 41, which is conducive to increasing the rotational speed of the motor 4, so that the motor 4 can meet the high-speed operation conditions.

[0107] Please see Figure 1In some embodiments, the axis of the second oil outlet 111 forms an acute angle α with the axis of the rotating shaft 2, that is, the second oil outlet 111 is an oblique hole provided on the rotating shaft 21.

[0108] For example, the included angle α is 15° to 60°.

[0109] It is understood that the second bearing 41 is located at the end of the rotating shaft 2, and the end of the rotating shaft 2 serves as the support for the rotating shaft 2, the first bearing 42, and the rotor assembly 31, thus requiring significant structural strength. Typically, the end of the rotating shaft 2 is made thicker to ensure its structural strength. Therefore, the second oil outlet 111 needs to be positioned away from the end of the rotating shaft 2 to avoid affecting its thickness. To ensure that the lubricating oil discharged from the second oil outlet 111 can contact the second bearing 41, the axis of the second oil outlet 111 needs to form an acute angle with the axis of the rotating shaft 2, so that one end of the second oil outlet 111 connects to the oil passage 22, and the other end faces the second bearing 41, facilitating the guidance of the lubricating oil in the oil passage 22 to the second bearing 41.

[0110] Please see Figure 1 In some embodiments, the housing 43 has an oil return chamber 436, which is located between the oil return port 435 and the mounting cavity 434. The oil return chamber 436 communicates with the oil return port 435, and the mounting cavity 434 communicates with the oil return chamber 436 through an oil return through hole 438. In this way, lubricating oil can be quickly collected through the oil return chamber 436, improving the oil return efficiency.

[0111] Please see Figure 1 In some embodiments, the housing 43 includes a first end cap 431, a second end cap 432, and an annular housing 433. The first end cap 431 is rotatably engaged with one end of the rotating shaft 2 via a second bearing 41. The second end cap 432 is rotatably engaged with the other end of the rotating shaft 2 via a second bearing 41. The two ends of the annular housing 433 are respectively connected to the first end cap 431 and the second end cap 432 to define a mounting cavity 434. The stator assembly 44 is connected to the inner circumferential surface of the annular housing 433. This makes the housing 43 a composite component, thereby reducing the manufacturing difficulty and cost of the housing 43 and improving its production efficiency.

[0112] The oil return port 435 is provided in at least one of the first end cover 431, the second end cover 432, and the annular housing 433.

[0113] Specifically, a portion of the oil return chamber 436 is located in the first end cover 431, a portion is located in the second end cover 432, and the remainder is located in the annular housing 433.

[0114] Please see Figure 4 , Figure 4This is a schematic diagram of the longitudinal section of the rotating shaft 2 provided in an exemplary embodiment of this disclosure. In some embodiments, the rotating shaft 2 further has a first inner cavity 24. The first inner cavity 24 is disposed around the oil passage 22. The first oil outlet 113 and the second oil outlet 111 are both connected to the first inner cavity 24. The first inner cavity 24 is connected to the oil passage 22 through a first intermediate hole 251. That is, the second oil outlet 111 is connected to the oil passage 22 in sequence through the first inner cavity 24 and the first intermediate hole 251.

[0115] In this way, after the lubricating oil enters the oil passage 22, it enters the first inner cavity 24 through the first intermediate hole 251 under the action of centrifugal force, and flows relatively evenly to both ends of the rotating shaft 2. This allows the lubricating oil to simultaneously enter the second oil outlets 111 located at both ends of the rotating shaft 2, so as to lubricate the two second bearings 41 at the same time, improve the consistency of lubrication of the two second bearings 41, and thus improve the performance consistency of the two second bearings 41. This not only helps to improve the working reliability of the motor 4, but also reduces the maintenance cost of the motor 4.

[0116] Please see Figure 4 In some embodiments, the second oil outlets 111 at both ends of the rotating shaft 2 are symmetrically distributed relative to the first intermediate hole 251. This improves the synchronicity and consistency of oil intake at the second oil outlets 111 at both ends of the rotating shaft 2, thereby improving the consistency of lubrication of the two second bearings 41.

[0117] Specifically, each end of the rotating shaft 2 is provided with a plurality of second oil outlets 111. The plurality of second oil outlets 111 at each end of the rotating shaft 2 are symmetrically distributed around the axis of the rotating shaft 2.

[0118] Specifically, along the axial direction of the rotating shaft 2, the first intermediate hole 251 is disposed in the middle of the first inner cavity 24.

[0119] Please see Figure 4 In some embodiments, there are multiple first intermediate holes 251. The multiple first intermediate holes 251 are symmetrically distributed along the axis of the rotating shaft 2. In this way, the flow rate of lubricating oil between the oil passage 22 and the first inner cavity 24 can be increased, and the uniformity of lubricating oil flowing into the first inner cavity 24 can be improved.

[0120] Please see Figure 1 and Figure 4 In some embodiments, a third oil outlet 112 is provided on the rotating shaft 2. One end of the third oil outlet 112 is connected to the oil passage 22, and the other end faces the rotor assembly 31 and is connected to the internal flow channel of the rotor assembly 31. In this way, the lubricating oil in the oil passage 22 can be introduced into the rotor assembly 31 through the third oil outlet 112 to cool the rotor assembly 31, thereby improving the performance of the motor 4.

[0121] It is understood that when there are two rotor assemblies 31, a third oil outlet 112 is provided on the part of the rotating shaft 2 opposite to each rotor assembly 31, so that the two rotor assemblies 31 can be cooled through the third oil outlet 112 respectively.

[0122] Please see Figures 5 to 8 , Figure 5 This is a schematic diagram of the structure of the rotor assembly 31 provided in an exemplary embodiment of this disclosure. Figure 6 This is a schematic cross-sectional view of the rotor assembly 31 provided in an exemplary embodiment of this disclosure. Figure 7 This is a schematic diagram of the rotor core 311 provided in an exemplary embodiment of this disclosure. Figure 8 This is a schematic diagram of the structure of the magnetic ring 312 provided in an exemplary embodiment of this disclosure. In some embodiments, the rotor assembly 31 includes a rotor core 311, a magnetic ring 312, and a plurality of rotor magnets 313. The rotor core 311 is sleeved on the rotating shaft 2. A first annular groove 3111 is provided on the rotor core 311. The first annular groove 3111 is arranged around the rotating shaft 2. The magnetic ring 312 is sleeved on the rotating shaft 2 and fixed in the first annular groove 3111. A plurality of mounting grooves 3121 are provided on the magnetic ring 312. The plurality of mounting grooves 3121 are spaced apart along the circumference of the rotating shaft 2. The plurality of rotor magnets 313 are respectively installed in the plurality of mounting grooves 3121.

[0123] Among them, the magnetic ring 312 has high permeability, which can provide a good path for the magnetic field of the motor 4, enabling the motor 4 to efficiently convert electrical energy into mechanical energy. Specifically, the material of the magnetic ring 312 can be silicon steel, soft magnetic ferrite, electrical pure iron, amorphous alloy, etc.

[0124] The rotor magnet 313 can interact with the magnetic field of the motor 4, enabling the rotor assembly 31 to generate torque and rotate. Specifically, the rotor magnet 313 can be made of magnets, winding coils, squirrel cage bars, etc.

[0125] It is understandable that multiple mounting slots 3121 are symmetrically distributed along the axis of the rotating shaft 2.

[0126] In this embodiment, the rotor magnet 313 provides a constant magnetic field, while the magnetic ring 312, with its excellent magnetic permeability, guides and concentrates the magnetic field generated by the rotor magnet 313, ensuring the magnetic field strength around the rotor assembly 31. This helps to improve the electromagnetic torque of the motor 4, thereby enhancing its output power and operating efficiency. Furthermore, the magnetic ring 312 provides support and protection for the rotor magnet 313, strengthening the overall mechanical strength of the rotor assembly 31. When the motor 4 rotates at high speed, it can withstand greater centrifugal force and mechanical stress, ensuring the stability and reliability of the rotor and preventing the rotor magnet 313 from cracking or shifting due to excessive force.

[0127] By setting multiple mounting slots 3121 and multiple rotor magnets 313, the magnetic field can be evenly distributed in the air gap of the motor 4, reducing magnetic field distortion and leakage, improving the utilization rate of the magnetic field, and thus improving the performance of the motor 4.

[0128] Please see Figures 5 to 8 In some embodiments, a first through hole 114 is provided on the inner circumference of the rotor core 311. The two ends of the first through hole 114 are respectively connected to the mounting groove 3121 and the third oil outlet 112 provided on the rotating shaft 2. The other end of the third oil outlet 112 is connected to the oil passage 22. A second through hole 115 is provided on the outer circumferential surface of the rotor core 311. One end of the second through hole 115 is connected to the mounting groove 3121. Thus, lubricating oil entering the oil passage 22 can enter the mounting groove 3121 through the first oil outlet 113 and the first through hole 114 to cool the rotor magnet 313 and the magnetic ring 312. Lubricating oil entering the mounting groove 3121 can be discharged through the second through hole 115, enter the mounting cavity 434, and flow to the return oil cavity 436 by gravity, and then be discharged through the return oil port 435.

[0129] Specifically, the number of first through holes 114 is the same as the number of mounting slots 3121, and multiple first through holes 114 are set in a one-to-one correspondence with multiple mounting slots 3121.

[0130] Please see Figures 5 to 9 In some embodiments, an oil passage groove 3122 is provided on the inner wall of the mounting groove 3121. One end of the oil passage groove 3122 communicates with the first through hole 114, and the other end communicates with the second through hole 115. In this way, the flow area of ​​lubricating oil in the mounting groove 3121 can be increased to improve the smoothness of lubricating oil flow, thereby improving the heat dissipation efficiency of the rotor assembly 31.

[0131] In addition, an oil passage groove 3122 is provided on the inner wall of the mounting groove 3121, which can effectively utilize the rotor magnet 313 to cover the groove opening of the oil passage groove 3122, so that the oil passage groove 3122 forms a flow channel 22 for lubricating oil, thereby reducing damage to the rotor core 311 and improving the overall strength of the rotor assembly 31.

[0132] Specifically, an oil groove 3122 is provided on a pair of opposite groove walls of each mounting groove 3121.

[0133] Specifically, such as Figure 6As shown, an annular channel 3112 is provided inside the rotor core 311. The end of the first through hole 114 facing away from the rotating shaft 2 communicates with the annular channel 3112. The annular channel 3112 communicates with the mounting groove 3121 through a second intermediate hole 3113. Two second intermediate holes 3113 are provided at the location of the rotor core 311 opposite to each mounting groove 3121. Two oil passage grooves 3122 of each mounting groove 3121 correspond one-to-one with and communicate with the two second intermediate holes 3113. Correspondingly, two second through holes 115 are provided at the location of the outer circumference of the rotor core 311 opposite to each mounting groove 3121. Two oil passage grooves 3122 of each mounting groove 3121 correspond one-to-one with and communicate with the two second through holes 115.

[0134] Please see 5 to Figure 9 The width of the opening of the mounting groove 3121 is smaller than the width of the bottom of the mounting groove 3121. The shape and dimensions of the mounting groove 3121 are consistent with the shape and dimensions of the rotor magnet 313. In this way, by making the width of the opening of the mounting groove 3121 smaller than the width of the bottom of the mounting groove 3121, the axial movement of the rotor magnet 313 along the rotating shaft 2 can be restricted, thereby improving the positional stability of the rotor magnet 313 within the mounting groove 3121.

[0135] It is understandable that the mounting slot 3121 is a sector-shaped slot and the rotor magnet 313 is a sector-shaped structure.

[0136] Please refer to 7 to Figure 9 In some embodiments, a slot 3123 is provided on the side of the magnetic ring 312 facing the bottom wall of the first annular groove 3111. A protrusion 3114 is provided on the bottom wall of the first annular groove 3111. The protrusion 3114 engages with the slot 3123. In this way, the mating area between the magnetic ring 312 and the rotor core 311 can be increased, which is beneficial to improving the synchronization of their rotation.

[0137] Please see Figure 1 and Figure 5 In some embodiments, a third through hole 116 is provided on the side of the rotor core 311 near the shaft 2. The third through hole 116 extends axially along the shaft 2 and communicates with the annular gap 50. A flared end 117 is provided at the end of the third through hole 116 away from the annular gap 50. The flared end 117 is located at the end of the rotor assembly 31 opposite to the first bearing 42. Thus, by providing the flared end 117, the suction force on the lubricating oil for lubricating the first bearing 42 can be increased, thereby allowing the lubricating oil in the oil passage 22 to enter the annular gap 50 more quickly through the first intermediate hole 251, the first inner cavity 24, and the first oil outlet 113, thereby improving the efficiency of lubrication of the first bearing 42.

[0138] Specifically, there are multiple third through holes 116, and the multiple third through holes 116 are symmetrically distributed along the axis of the rotating shaft 2.

[0139] Specifically, the flared opening 117 is a tapered hole provided on the rotor core 311. The rotor core 311 is provided with multiple third through holes 116, all of which are connected to the small-diameter end of the tapered hole. It can be understood that the small-diameter end of the tapered hole is located close to the first bearing 42, and the large-diameter end of the tapered hole is located away from the first bearing 42.

[0140] Specifically, lubricating oil flows into oil passage 22 from the oil supply line. The rotation of the shaft 2 generates centrifugal force, and the lubricating oil, under the action of centrifugal force, enters the first inner cavity 24 through the first intermediate hole 251. The lubricating oil flows evenly to both ends of the shaft 2 within the first inner cavity 24. Then, the lubricating oil in the first inner cavity 24 is mainly divided into three parts. The first part of the lubricating oil enters the annular gap 50 through the first oil outlet 113 to lubricate and cool the first bearing 42. Then, the first part of the lubricating oil flows out through the third through hole 116 and flows to the return oil port 435 under gravity. The second part of the lubricating oil is thrown towards the second bearing 41 through the second oil outlet 111 to lubricate and cool the second bearing 41. Then, the second part of the lubricating oil flows to the return oil port 435 under gravity. The third part of the lubricating oil flows sequentially through the third oil outlet 112, the first through hole 114, the annular passage 3112, and the second intermediate hole 3113 before flowing into the oil trough 3122 to cool components such as the rotor magnet 313. Then the third part of the lubricating oil flows out from the second through hole 115 and flows to the return oil port 435 under the action of gravity.

[0141] Please see Figure 10 , Figure 10 yes Figure 1 Enlarged schematic diagram at point D. In some embodiments, the second bearing 41 includes a second inner ring 411, a second outer ring 412, an annular cover 413, and a plurality of balls 414. The second inner ring 411 is fitted onto the rotating shaft 2 and is interference-fitted with the rotating shaft 2. The second outer ring 412 is fitted onto the second inner ring 411. The plurality of balls 414 are rotatably disposed between the second inner ring 411 and the second outer ring 412, and the plurality of balls 414 are arranged sequentially along the circumference of the second inner ring 411. The annular cover 413 is disposed between the second inner ring 411 and the second outer ring 412, and is located on the side of the balls 414 away from the rotor assembly 31. The annular cover 413 is connected to one of the second inner ring 411 and the second outer ring 412, and is clearance-fitted to the other.

[0142] This design makes the second bearing 41 open at one end near the second oil outlet 111 and closed at the other end. This facilitates the second bearing 41 in receiving lubricating oil while preventing lubricant leakage.

[0143] It is understandable that, in order to improve the sealing performance of the end of the second bearing 41 away from the second oil outlet 111, an oil seal can be provided between the ring seal cover 413 and the second inner ring 411 and the second outer ring 412.

[0144] It is understood that in the motor 4 provided in this application embodiment, the flow rate of lubricating oil can be reasonably adjusted according to the thermal load of the stator and rotor assembly 31. That is, the diameter and number of the first oil outlet 113, the second oil outlet 111, and the third oil outlet 112 can be adjusted. The stator assembly 44 and the rotor assembly 31 can be cooled. The cooling of the stator assembly 44 can be achieved by water cooling of the outer casing 43 or by providing oil channels 22 inside the stator.

[0145] According to a third aspect of this application, a vehicle is also provided, the vehicle including the aforementioned motor 4.

[0146] It is understood that the vehicle includes the aforementioned motor 4. The vehicle possesses all the beneficial effects of motor 4, which will not be elaborated upon here.

[0147] The vehicles may be gasoline-powered vehicles, plug-in hybrid electric vehicles, or new energy vehicles, etc., and this disclosure does not make specific limitations in this regard.

[0148] In the description 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0149] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0150] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0151] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An electric motor (4), characterized in that, include: The rotating shaft (2) has an oil passage (22) and a first oil outlet (113), one end of which is connected to the oil passage (22); A stator assembly (44) is arranged around the outer periphery of the rotating shaft (2), and an annular gap (50) is formed between the stator assembly (44) and the rotating shaft (2). The other end of the first oil outlet (113) is connected to the annular gap (50). The rotor assembly (31) is sleeved on the rotating shaft (2); The first bearing (42) is located within the annular gap (50) and disposed between the rotating shaft (2) and the stator assembly (44); as well as The first oil baffle (492) is disposed at the magnetic gap (60) between the stator assembly (44) and the rotor assembly (31).

2. The motor (4) according to claim 1, characterized in that, In the radial direction of the rotating shaft (2), the first oil baffle (492) is located at the radially inner opening of the magnetic gap (60).

3. The motor (4) according to claim 1, characterized in that, The rotor assembly (31) includes: The rotor core (311) is sleeved on the rotating shaft (2); and The rotor magnet (313) is located on the side of the rotor core (311) near the stator assembly (44); The first oil baffle (492) is located on the radial inner side of the rotor magnet (313).

4. The motor (4) according to claim 3, characterized in that, The first oil baffle (492) is integrally formed with the rotor core (311).

5. The motor (4) according to claim 3, characterized in that, The stator assembly (44) includes: A stator core (441) is arranged around the outer periphery of the rotating shaft (2), and the annular gap (50) is formed between the stator core (441) and the rotating shaft (2); and The stator winding (442) is disposed on the stator core (441) and is disposed opposite to the rotor magnet (313) along the axial direction of the shaft (2).

6. The motor (4) according to claim 5, characterized in that, The stator core (441) has a receiving groove (491) on the side facing the rotor core (311), and part of the first oil baffle (492) is accommodated in the receiving groove (491).

7. The motor (4) according to any one of claims 1-6, characterized in that, The number of rotor assemblies (31) and the number of first oil baffles (492) are both two. Along the axial direction of the rotating shaft (2), the two rotor assemblies (31) are located on both sides of the stator assembly (44), and the two first oil baffles (492) are located on both sides of the stator assembly (44) and between the stator assembly (44) and the adjacent rotor assembly (31).

8. The motor (4) according to any one of claims 1-6, characterized in that, The number of the first bearings (42) is two, and the two first bearings (42) are arranged at intervals along the axial direction of the rotating shaft (2) on the rotating shaft (2).

9. The motor (4) according to claim 8, characterized in that, The end of the first oil outlet (113) away from the oil passage (22) is located between the two first bearings (42).

10. The motor (4) according to any one of claims 1-6, characterized in that, The motor (4) also includes a second oil baffle (46); The first oil baffle (492) is connected to the rotor assembly (31), and a first gap (51) is formed between the first oil baffle (492) and the stator assembly (44) in the axial direction of the rotating shaft (2); The second oil baffle (46) is connected to the stator assembly (44), and a second gap (52) is formed between the second oil baffle (46) and the rotor assembly (31) in the axial direction of the rotating shaft (2); A third gap (53) is formed between the first oil baffle (492) and the second oil baffle (46) in the radial direction of the rotating shaft (2); In the axial direction of the rotating shaft (2), the first gap (51) and the second gap (52) are spaced apart, and the two ends of the third gap (53) are respectively connected to the first gap (51) and the second gap (52).

11. The motor (4) according to claim 10, characterized in that, The second oil baffle (46) is disposed at one axial end of the first bearing (42), and the first oil outlet (113) is located at the other axial end of the first bearing (42). An oil outlet channel for lubricating oil to pass through is formed between the first oil baffle (492) and the rotating shaft (2).

12. The motor (4) according to claim 11, characterized in that, The second oil baffle (46) has an annular structure and is disposed on the radial inner side of the stator assembly (44). The second oil baffle (46) is attached to the outer ring of the first bearing (42), and the inner circumferential surface of the second oil baffle (46) is flush with the inner circumferential surface of the outer ring.

13. The motor (4) according to claim 12, characterized in that, The motor (4) also includes an inner ring body (45), which is sleeved on the rotating shaft (2). The second oil baffle (46) and the inner ring body (45) are opposite each other in the radial direction of the rotating shaft (2). The outer circumferential surface of the inner ring body (45) is flush with the outer circumferential surface of the inner ring of the first bearing (42). The oil outlet channel is formed by the second oil baffle (46) and the inner ring body (45).

14. The motor (4) according to claim 13, characterized in that, The inner ring (45) is integrally formed with the rotating shaft (2).

15. The motor (4) according to claim 12, characterized in that, The second oil baffle (46) is integrally disposed with the stator assembly (44).

16. The motor (4) according to any one of claims 1-6, characterized in that, The motor (4) also includes a housing (43) and a second bearing (41), the housing (43) having a mounting cavity (434) and an oil return port (435) communicating with the mounting cavity (434); The rotating shaft (2), the stator assembly (44) and the rotor assembly (31) are disposed in the mounting cavity (434); The second bearing (41) is disposed between the rotating shaft (2) and the housing (43); A second oil outlet (111) is provided on the rotating shaft (2). One end of the second oil outlet (111) is connected to the oil passage (22), and the other end is configured to discharge oil to the second bearing (41).

17. The motor (4) according to claim 16, characterized in that, The axis of the second oil outlet (111) forms an acute angle with the axis of the rotating shaft (2).

18. The motor (4) according to claim 16, characterized in that, The outer casing (43) has an oil return chamber (436) located between the oil return port (435) and the mounting cavity (434). The oil return chamber (436) is connected to the oil return port (435), and the mounting cavity (434) is connected to the oil return chamber (436) through an oil return through hole (438).

19. The motor (4) according to claim 16, characterized in that, The outer casing (43) includes: The first end cap (431) is rotatably engaged with one end of the rotating shaft (2) via the second bearing (41); The second end cap (432) is rotatably engaged with the other end of the rotating shaft (2) via the second bearing (41); and The annular housing (433) is connected at both ends to the first end cover (431) and the second end cover (432) respectively, to define the mounting cavity (434); the stator assembly (44) is connected to the inner circumferential surface of the annular housing (433); The oil return port (435) is provided at least in one of the first end cover (431), the second end cover (432), and the annular housing (433).

20. A vehicle, characterized in that, Includes the motor (4) as described in any one of claims 1-19.

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