Motor assembly and vehicle

Abstract

The invention discloses a motor assembly and a vehicle, and the motor assembly comprises a motor housing which is internally provided with a stator installation cavity and a rotor installation cavity; the stator structure is mounted in the stator mounting cavity, the rotor structure is mounted in the rotor mounting cavity, and the rotor structure is nested in the stator structure and can rotate relative to the stator structure; the sealing structure is connected between the stator structure and the rotor structure in a sealing manner, and the stator mounting cavity and the rotor mounting cavity are separated by the sealing structure; wherein the axial end part of the rotor structure is provided with a driving fan blade, and the driving fan blade is suitable for driving airflow to flow to the sealing structure when the rotor structure rotates, so that the sealing structure tightly presses the stator structure. According to the motor assembly, the sealing structure is pressed towards the stator structure through air pressure generated by rotation of the rotor structure, the sealing performance of the joint of the stator structure and the rotor structure is improved, cooling oil in the stator installation cavity can be prevented from leaking, and the cooling effect of the stator structure is improved.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have been widely used. As a core component of new energy vehicles, the requirements for drive motors are becoming increasingly stringent. With the growing demand for motor miniaturization, the problem of motor heat dissipation has become more prominent. During motor operation, the motor winding coils are one of the main heat-generating components. To improve cooling efficiency, immersion cooling solutions have been proposed and validated in recent years. However, the stator sealing methods in various solutions still pose significant risks, especially given the small air gap between the stator and rotor in automotive motors, making the arrangement of seals on the inner diameter of the stator coils difficult and leaving room for improvement. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a motor assembly in which the air pressure generated by the rotation of the rotor structure presses the sealing structure toward the stator structure, improving the sealing performance at the connection between the stator and rotor structures. This prevents the cooling oil in the stator mounting cavity from leaking from the connection between the stator and rotor structures, thereby improving the cooling effect of the stator structure.

[0004] According to an embodiment of the present invention, a motor assembly includes: a motor housing having a stator mounting cavity and a rotor mounting cavity formed therein; a stator structure and a rotor structure, wherein the stator structure is mounted in the stator mounting cavity, the rotor structure is mounted in the rotor mounting cavity, the rotor structure is nested within the stator structure and is rotatable relative to the stator structure; and a sealing structure sealingly connecting the stator structure and the rotor structure, and the sealing structure separating the stator mounting cavity and the rotor mounting cavity; wherein, the axial end of the rotor structure is provided with a drive fan blade, the drive fan blade being adapted to drive airflow toward the sealing structure when the rotor structure rotates, so that the sealing structure presses against the stator structure.

[0005] According to the embodiment of the present invention, the motor assembly is configured such that the rotor structure drives the fan blades to drive the airflow toward the sealing structure while rotating. The air pressure allows the sealing structure to press the stator structure tightly, improving the sealing performance at the connection between the stator and rotor structures. This prevents the cooling oil in the stator mounting cavity from leaking from the connection between the stator and rotor structures, thereby improving the cooling effect of the stator structure. The overall structure is simple, has good sealing performance, and is effective in use.

[0006] According to some embodiments of the present invention, in the motor assembly, the axial end of the rotor structure is provided with a balance plate, the drive fan blade is disposed on the radially outer side of the balance plate, and the drive airflow flows radially outward when the rotor structure rotates.

[0007] According to some embodiments of the present invention, the motor assembly includes a plurality of drive fan blades, which are distributed at circumferential intervals along the balance plate.

[0008] According to some embodiments of the present invention, an airflow cavity is formed between two adjacent drive fan blades, the airflow cavity being open in a direction away from the centerline of the rotor structure and extending circumferentially along the rotor structure.

[0009] According to some embodiments of the present invention, the drive fan blades are configured to extend radially or to extend along an arc.

[0010] According to some embodiments of the present invention, the motor assembly includes a first seal and a second seal, wherein the first seal and the second seal are respectively installed at both axial ends of the stator structure.

[0011] According to some embodiments of the present invention, in the motor assembly, both the first seal and the second seal are constructed as sealing sleeves, a first limiting portion is formed on the inner circumference of the stator structure, and a second limiting portion is provided inside the motor housing. The first limiting portion and the second limiting portion are distributed opposite to each other along the axial direction of the stator structure. One axial end of the sealing sleeve is limited and engaged with the first limiting portion, and the other axial end is limited and engaged with the second limiting portion.

[0012] According to some embodiments of the present invention, the motor assembly has a liquid inlet and a liquid outlet in the motor housing, the liquid inlet and the liquid outlet being spaced apart along the axial direction of the stator structure, and the liquid inlet and the liquid outlet being respectively connected to the stator mounting cavity.

[0013] According to some embodiments of the present invention, the motor assembly has an oil pan in the motor housing, an oil storage chamber is formed in the oil pan, and the rotor mounting cavity has an oil drain port on the side near the oil pan, the oil drain port being in communication with the oil storage chamber.

[0014] The present invention also proposes a vehicle.

[0015] The vehicle according to embodiments of the present invention includes the motor assembly of any of the above embodiments.

[0016] The vehicle and the aforementioned motor assembly have the same advantages over the prior art, which will not be repeated here.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a cross-section of the motor assembly according to an embodiment of the present invention. Figure 1 ; Figure 2 This is an exploded view of the motor assembly according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the rotor structure of the motor assembly according to an embodiment of the present invention; Figure 4 This is a side view of the rotor structure of the motor assembly according to an embodiment of the present invention; Figure 5 This is a cross-section of the motor assembly according to an embodiment of the present invention. Figure 2 ; Figure 6 yes Figure 5 Enlarged view of point A in the middle; Figure 7 This is a cross-section of the motor assembly according to an embodiment of the present invention. Figure 3 ; Figure 8 This is a cross-sectional view of the stator structure of the motor assembly according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the stator structure of the motor assembly according to an embodiment of the present invention.

[0019] Figure label: Motor assembly 100, Motor housing 1, stator mounting cavity 11, rotor mounting cavity 12, second limiting part 13, liquid inlet 14, liquid outlet 15, oil pan 16, oil storage cavity 17, oil drain port 18, end cap 19. Stator structure 2, first limiting part 21, stator core 22, injection molded body 23, coil 24. Rotor structure 3, drive fan blade 31, balance plate 32, airflow chamber 33, rotor core 34, shaft 35, bearing 36. Sealing structure 4, first seal 41, second seal 42. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Unless otherwise specified, the front-back direction in this application refers to the longitudinal direction of the vehicle, i.e., the X direction; the left-right direction refers to the lateral direction of the vehicle, i.e., the Y direction; and the up-down direction refers to the vertical direction of the vehicle, i.e., the Z direction.

[0023] The following is for reference. Figures 1-9 The motor assembly 100 according to an embodiment of the present invention uses air pressure generated by the rotation of the rotor structure 3 to press the sealing structure 4 toward the stator structure 2, thereby improving the sealing performance at the connection between the stator structure 2 and the rotor structure 3 and preventing the cooling oil in the stator mounting cavity 11 from leaking from the connection between the stator structure 2 and the rotor structure 3, thus improving the cooling effect of the stator structure 2.

[0024] like Figures 1-9 As shown, the motor assembly 100 according to an embodiment of the present invention includes: a motor housing 1, a stator structure 2, a rotor structure 3, and a sealing structure 4.

[0025] The motor housing 1 has a stator mounting cavity 11 and a rotor mounting cavity 12. The stator structure 2 is mounted in the stator mounting cavity 11, and the rotor structure 3 is mounted in the rotor mounting cavity 12. The rotor structure 3 is nested in the stator structure 2 and is rotatable relative to the stator structure 2.

[0026] Specifically, the motor assembly 100 is an electromagnetic mechanical device that converts electrical energy into mechanical energy. Converting electrical energy into mechanical energy allows it to serve as a power source for electrical appliances or machinery, while converting mechanical energy into electrical energy provides energy to the power system. The motor assembly 100 includes a motor housing 1, which is the external protective structure of the motor assembly 100. The motor housing 1 is located on the outermost side of the motor assembly 100 and is used for the installation of internal components. It can protect internal components, assist in heat dissipation, provide mechanical support, and provide electromagnetic shielding, among other things.

[0027] The motor housing 1 includes a stator mounting cavity 11 for mounting the stator structure 2. The stator structure 2 is detachably mounted within the stator mounting cavity 11, facilitating installation, disassembly, and maintenance. The motor housing 1 also includes a rotor mounting cavity 12 for mounting the rotor structure 3. The rotor structure 3 is detachably mounted within the rotor mounting cavity 12, facilitating installation, disassembly, and maintenance. The rotor structure 3 is nested within the stator structure 2 and is rotatable relative to it, meaning it can be coaxially arranged with the stator structure 2. The stator structure 2 is fitted around the rotor structure 3, facilitating relative rotation between them. The stator structure 2 corresponds to the stator mounting cavity 11, and the rotor structure 3 corresponds to the rotor mounting cavity 12; the stator mounting cavity 11 is located radially outside the rotor mounting cavity 12. Furthermore, the rotor structure 3 can rotate relative to the stator structure 2. That is, the stator structure 2 can be a fixed part, and the rotor structure 3 is a rotating part. In this way, when the motor assembly 100 is used as a power source, by supplying power to the motor assembly 100, the stator structure 2 generates a magnetic field to drive the rotor structure 3 to rotate, and the power can be output through the rotor structure 3.

[0028] Furthermore, the sealing structure 4 is sealed between the stator structure 2 and the rotor structure 3. The sealing structure 4 has a sealing function. By placing the sealing structure 4 between the stator structure 2 and the rotor structure 3, the connection between the stator structure 2 and the rotor structure 3 can be sealed. The sealing structure 4 also separates the stator mounting cavity 11 and the rotor mounting cavity 12. That is, the sealing structure 4 can be located between the stator mounting cavity 11 and the rotor mounting cavity 12, which can separate the stator mounting cavity 11 and the rotor mounting cavity 12. The sealing structure 4 can seal between the stator mounting cavity 11 and the rotor mounting cavity 12, which can ensure the reliability of the seal between the stator mounting cavity 11 and the rotor mounting cavity 12.

[0029] The stator mounting cavity 11 serves two purposes: providing mounting space for the stator structure 2 and allowing coolant to circulate. The coolant can be cooling oil. During operation, the stator structure 2 generates heat. By introducing cooling oil into the stator mounting cavity 11, the stator structure 2 located inside can be immersed in the cavity for cooling. The sealing structure 4 reduces the flow of cooling oil from the stator mounting cavity 11 into the rotor mounting cavity 12, thereby reducing cooling oil leakage and improving the cooling stability and reliability of the stator structure 2.

[0030] The rotor structure 3 has a drive fan blade 31 at its axial end. The drive fan blade 31 is adapted to drive the airflow to the sealing structure 4 when the rotor structure 3 rotates so that the sealing structure 4 presses the stator structure 2.

[0031] Specifically, the drive fan blade 31 is located at the axial end of the rotor structure 3, which allows the drive fan blade 31 to drive the airflow towards the sealing structure 4 located between the rotor structure 3 and the stator structure 2 during the rotation of the rotor structure 3. The pressure applied by the gas pushes the sealing structure 4, so that the sealing structure 4 can press the stator structure 2, improve the sealing performance of the sealing structure 4 to the stator structure 2, and further improve the sealing performance of the sealing structure 4 at the connection between the stator structure 2 and the rotor structure 3.

[0032] In this way, during the operation of the motor assembly 100, the rotation of the rotor structure 3 generates air pressure, which presses the sealing structure 4 toward the stator structure 2. At the same time, the stator mounting cavity 11 is filled with cooling oil to cool the stator structure 2. The air pushes the sealing structure 4 to seal the stator mounting cavity 11, which can prevent the cooling oil in the stator mounting cavity 11 from leaking from the sealing structure 4, ensuring the cooling effect of the stator structure 2, and preventing the rotor structure 3 from generating oil churning loss, thereby improving the efficiency of the motor assembly 100.

[0033] According to the embodiment of the present invention, the motor assembly 100 drives the fan blades 31 to drive the airflow toward the sealing structure 4 while the rotor structure 3 rotates. The air pressure allows the sealing structure 4 to press the stator structure 2 tightly, thereby improving the sealing performance at the connection between the stator structure 2 and the rotor structure 3. This prevents the cooling oil in the stator mounting cavity 11 from leaking from the connection between the stator structure 2 and the rotor structure 3, thus improving the cooling effect of the stator structure 2. The overall structure is simple, has good sealing performance, and has good performance.

[0034] In some embodiments, a balance plate 32 is provided at the axial end of the rotor structure 3, and the driving fan blade 31 is located on the radial outer side of the balance plate 32. When the rotor structure 3 rotates, the driving airflow flows radially outward.

[0035] Specifically, the balance plate 32 can adjust the mass distribution of the rotor structure 3, making the center of mass coincide with the rotation axis 35, thereby eliminating the centrifugal force caused by mass eccentricity, ensuring the stable operation of the motor assembly 100, reducing vibration and noise, and extending the equipment life. The balance plate 32 is located at the axial end of the rotor structure 3, connecting the rotor structure 3 to its outer axial end, and is used to balance the center of mass of the rotor structure 3.

[0036] And such as Figure 3 As shown, the balance plate 32 is connected to the axial end of the rotor structure 3, so that the balance plate 32 and the rotor structure 3 are connected as one unit, and the balance plate 32 can rotate with the rotor structure 3. The drive fan blade 31 is set on the radial outer side of the balance plate 32, so that the drive fan blade 31 is located at a position away from the rotation center of the rotor structure 3. In this way, when the rotor structure 3 rotates, the balance plate 32 and the drive fan blade 31 rotate with it, which can drive the airflow to flow radially outward, so that a large amount of gas forms a high-pressure area in the region of the rotor structure 3 near the sealing structure 4, so that the gas forms a gas wall in the region near the sealing structure 4. In this way, the sealing structure 4 is sealed to the stator mounting cavity 11 by the gas pressing the sealing structure 4.

[0037] In this way, the stator mounting cavity 11 is sealed by air pressure, thereby sealing the oil. At the same time, the high-pressure air pushes the sealing structure 4 and the stator structure 2 to make the connection tighter, which can enhance the original sealing performance.

[0038] Among them, such as Figure 3 and Figure 5 As shown, the rotor structure 3 includes a rotor core 34, a rotating shaft 35, and a bearing 36. The rotor core 34 is sleeved on the rotating shaft 35, and the rotor core 34 can drive the rotating shaft 35 to rotate together. The bearing 36 is rotatably supported between the two axial ends of the rotating shaft 35 and the motor housing 1, which can ensure the smoothness and accuracy of the rotation of the rotating shaft 35. A balance plate 32 is connected to each of the two axial ends of the rotor core 34. The rotor core 34 and the balance plate 32 can rotate together relative to the stator structure 2.

[0039] In some embodiments, there are multiple drive fan blades 31, which are distributed at intervals along the circumferential direction of the balance plate 32.

[0040] Specifically, multiple drive blades 31 are arranged at intervals along the circumference of the balance plate 32, so that the multiple drive blades 31 drive the gas radially outward at multiple positions in the circumference of the balance plate 32. This allows the gas in the circumference of the rotor structure 3 to flow radially outward during the rotation of the rotor structure 3, forming a high-pressure area in the circumference of the radially outer side of the balance plate 32. This applies a thrust to the sealing structure 4 in the circumference, ensuring that the sealing structure 4 presses against the circumference of the stator structure 2, thereby improving the sealing reliability and stability of the sealing structure 4 against the stator mounting cavity 11 and effectively improving the sealing performance of the oil.

[0041] The multiple drive fan blades 31 can be evenly spaced along the circumference of the balance plate 32, which improves the uniformity of the arrangement of the multiple drive fan blades 31 and the uniformity of the distribution of high-pressure gas around the circumference, thereby improving the uniformity of the high-pressure gas's compression of the sealing structure 4 around the circumference. The drive fan blades 31 can be configured as two, three, four, five, six, etc. Figure 4 and Figure 7 As shown, in this embodiment, the drive fan blades 31 are provided with eight blades.

[0042] In some embodiments, an airflow cavity 33 is formed between two adjacent drive blades 31. The airflow cavity 33 is open in a direction away from the centerline of the rotor structure 3 and extends circumferentially along the rotor structure 3.

[0043] Specifically, an airflow cavity 33 is provided between two adjacent drive blades 31 to provide a channel for gas flow, allowing gas to flow between the two drive blades 31. The airflow cavity 33 is open in a direction away from the centerline of the rotor structure 3, that is, the airflow cavity 33 is open radially outward. This facilitates the gas to flow out from the open side of the airflow cavity 33 when flowing radially. The radially open side of the airflow cavity 33 allows the open side of the airflow cavity 33 to be close to the sealing structure 4, making it easier to blow the gas toward the sealing structure 4. Furthermore, the airflow cavity 33 extends circumferentially along the rotor structure 3, allowing circumferentially distributed gas to flow toward the sealing structure 4 along the airflow cavity 33. The large area of ​​the airflow cavity 33 can reduce the gas flow resistance and increase the gas flow rate.

[0044] The balance plate 32 is constructed as a circular plate, and the number of airflow chambers 33 matches the number of drive fan blades 31. Multiple drive fan blades 31 correspond to multiple airflow chambers 33. In this way, when the rotor structure 3 rotates, the gas in the circumferential ring can flow radially outward from multiple airflow chambers 33, improving the uniformity of gas flow and allowing the gas to uniformly cover the circumferential ring of the sealing structure 4, thereby improving the uniformity of air pressure in the circumferential ring of the sealing structure 4.

[0045] In some embodiments, the drive blade 31 is configured to extend radially or along an arc. That is, the drive blade 31 can be configured to extend radially, i.e., to be a straight plate structure; or the drive blade 31 can be configured to extend along an arc, i.e., to be an arc-shaped structure. Both configurations enable the drive blade 31 to drive the gas to flow radially outward during the rotation of the rotor structure 3. The configuration is diverse and can be flexibly selected. Furthermore, the structure is simple, easy to manufacture, and has low manufacturing costs.

[0046] In some embodiments, the sealing structure 4 includes a first sealing element 41 and a second sealing element 42, which are respectively installed at both axial ends of the stator structure 2.

[0047] Specifically, such as Figure 5 As shown, the first seal 41 is installed at one axial end of the stator structure 2, and the second seal 42 is installed at the other axial end of the stator structure 2. The first seal 41 can seal between one axial end of the stator structure 2 and one axial end of the rotor structure 3, so that the first seal 41 can seal one axial end of the stator structure 2 and the rotor structure 3, and can seal the stator mounting cavity 11 and the rotor mounting cavity 12 at one axial end. The second seal 42 can seal between the other axial end of the stator structure 2 and the other axial end of the rotor structure 3, so that the second seal 42 can seal the other axial end of the stator structure 2 and the rotor structure 3, and can seal the stator mounting cavity 11 and the rotor mounting cavity 12 at the other axial end.

[0048] The rotor structure 3 has a balance plate 32 at both axial ends, and each balance plate 32 at both axial ends is equipped with a drive fan blade 31. This allows the airflow at both axial ends of the rotor structure 3 to flow to the sealing structure 4 through their respective drive fan blades 31, thereby improving the sealing performance at the connection between the stator structure 2 and the rotor structure 3.

[0049] Thus, through the cooperation of the two sets of drive fan blades 31 with the first seal 41 and the second seal 42, the axial ends of the stator structure 2 and the rotor structure 3 can be sealed respectively, which can improve the overall sealing characteristics of the motor assembly 100 and ensure the operational reliability and safety of the motor assembly 100.

[0050] In some embodiments, the first seal 41 and the second seal 42 are both constructed as sealing sleeves. A first limiting portion 21 is formed on the inner circumference of the stator structure 2, and a second limiting portion 13 is provided inside the motor housing 1. The first limiting portion 21 and the second limiting portion 13 are distributed opposite to each other along the axial direction of the stator structure 2. One axial end of the sealing sleeve is limited and engaged with the first limiting portion 21, and the other axial end is limited and engaged with the second limiting portion 13.

[0051] Specifically, such as Figure 6 and Figure 8 As shown, the inner circumference of the stator structure 2 is provided with a first limiting part 21. One axial end of the sealing sleeve is limited and engaged with the first limiting part 21, so that the axial end of the sealing sleeve can be installed with the stator structure 2. The first limiting part 21 can be constructed as a limiting groove. The outer circumferential wall of the sealing sleeve is pressed and engaged with the limiting groove, so that the axial end of the sealing sleeve can be installed and the sealing sleeve can seal the stator structure 2 at the limiting groove. The limiting groove is constructed to extend along the circumference of the stator structure 2, so that the axial end of the sealing sleeve is pressed against the limiting groove in the circumferential direction, thereby improving the sealing reliability between the sealing sleeve and the stator structure 2.

[0052] And such as Figure 6 As shown, a second limiting part 13 is provided inside the motor housing 1. The other axial end of the sealing sleeve is limited and engaged with the second limiting part 13, allowing the other axial end of the sealing sleeve to be installed with the motor housing 1. The second limiting part 13 can be constructed as a limiting boss. The inner circumferential wall of the sealing sleeve abuts against the limiting boss, enabling the installation of the other axial end of the sealing sleeve. The limiting boss extends circumferentially along the stator structure 2, allowing the other axial end of the sealing sleeve to abut against the limiting boss around the circumference, improving the installation reliability of the sealing sleeve and the motor housing 1. Furthermore, the limiting boss protrudes from the inner wall of the motor housing 1, allowing the inner wall of the motor housing 1 to abut against the other axial end of the sealing sleeve, achieving axial limitation of the sealing sleeve. A limiting groove forms a limiting surface in the direction away from the limiting boss, which can abut against one axial end of the sealing sleeve, achieving axial limitation of the sealing sleeve. Thus, the installation reliability of the sealing sleeve can be ensured.

[0053] Meanwhile, the first limiting part 21 and the second limiting part 13 are distributed relative to each other along the axial direction of the stator structure 2, so that the first limiting part 21 is distributed corresponding to one end of the axial direction of the sealing sleeve, which facilitates the limiting cooperation between the two, and the second limiting part 13 is distributed corresponding to the other end of the axial direction of the sealing sleeve, which facilitates the limiting cooperation between the two.

[0054] Thus, one axial end of the sealing sleeve is nested inside the stator structure 2 and the other axial end is sleeved outside the second limiting part 13, which can realize the installation of the sealing sleeve between the stator mounting cavity 11 and the rotor mounting cavity 12. The installation process is simple and convenient.

[0055] There are two sealing sleeves, which are connected to the two axial ends of the stator structure 2 and are arranged symmetrically along the axial direction of the stator structure 2, as follows: Figure 8 and Figure 9 As shown, the stator structure 2 includes a stator core 22, an injection-molded body 23, and a coil 24. The inner ring of the injection-molded body 23 is provided with two first limiting parts 21. The two first limiting parts 21 are located at the two axial ends of the injection-molded body 23 respectively, and are respectively limited to one axial end of the two sealing sleeves. Two second limiting parts 13 can be provided on the inner peripheral wall of the motor housing 1. The two second limiting parts 13 are spaced apart and are respectively limited to the other axial end of the two sealing sleeves.

[0056] And such as Figure 2 , Figure 5 and Figure 6 As shown, the motor housing 1 is also provided with an end cover 19. The end cover 19 can be detachably connected to the motor housing 1. One of the second limiting parts 13 can be provided on the end cover 19. In this way, after the stator structure 2, rotor structure 3, and sealing structure 4 are installed on the motor housing 1, the end cover 19 is connected to the motor housing 1 to seal the various structures inside the motor housing 1 and limit the sealing sleeve.

[0057] In some embodiments, the motor housing 1 is provided with a liquid inlet 14 and a liquid outlet 15, which are spaced apart along the axial direction of the stator structure 2, and are respectively connected to the stator mounting cavity 11.

[0058] Specifically, the inlet 14 is used for the inflow of cooling oil, and the outlet 15 is used for the outflow of cooling oil. The inlet 14 and the outlet 15 are spaced apart along the axial direction of the stator structure 2, so that the inlet 14 and the outlet 15 form a certain distance in the axial direction of the stator structure 2. The distance between the inlet 14 and the outlet 15 can be greater than the axial length of the stator structure 2, so that the cooling oil can enter the motor housing 1 from one end of the axial direction of the stator structure 2 and can flow out of the motor housing 1 from the other end of the axial direction of the stator structure 2. The inlet 14 and the outlet 15 are respectively connected to the stator mounting cavity 11 and are respectively connected to the external flow path. That is, external cooling oil can be introduced into the stator mounting cavity 11 through the inlet 14, and the cooling oil in the stator mounting cavity 11 can be discharged from the stator mounting cavity 11 through the outlet 15.

[0059] In actual use, cooling oil flows into the stator mounting cavity 11 from the inlet 14, and after the cooling oil cools the stator structure 2, it flows out of the stator mounting cavity 11 from the outlet 15.

[0060] In some embodiments, the motor housing 1 is provided with an oil pan 16, and an oil storage chamber 17 is formed inside the oil pan 16.

[0061] Specifically, an oil storage chamber 17 is formed inside the oil pan 16 for storing cooling oil. The oil pan 16 is located on the motor housing 1, so that the motor housing 1 can store cooling oil through the oil pan 16. The oil pan 16 can be detachably connected to the motor housing 1 for easy disassembly and maintenance. The oil pan 16 can also be integrally formed with the motor housing 1. The setting method is not limited and can be set according to the actual situation.

[0062] Among them, such as Figure 1 and Figure 5 As shown, the rotor mounting cavity 12 is provided with an oil drain port 18 on the side near the oil pan 16. The oil drain port 18 is connected to the oil storage cavity 17. The oil drain port 18 has the function of draining oil. The oil drain port 18 is located in the rotor mounting cavity 12, which allows the oil in the rotor mounting cavity 12 to be discharged. The oil drain port 18 is distributed on the side near the oil pan 16, which allows the oil to be discharged towards the oil pan 16 through the oil drain port 18. The oil drain port 18 is connected to the oil storage cavity 17, which allows the oil at the oil drain port 18 to flow into the oil storage cavity 17 for storage.

[0063] In actual use, when the rotor structure 3 operates at high speed, it generates high air pressure. This air pressure presses against the sealing structure 4, effectively sealing the stator mounting cavity 11. At this time, the cooling oil in the stator mounting cavity 11 has good sealing performance and will not leak into the rotor mounting cavity 12. However, when the rotor structure 3 operates at low speed or is stationary, the sealing performance of the sealing structure 4 on the stator mounting cavity 11 is poor, and the cooling oil in the stator mounting cavity 11 may enter the rotor mounting cavity 12. Figure 5 As shown, when the rotor structure 3 rotates, an airflow in the direction of the arrow is formed in the rotor mounting cavity 12. The cooling oil in the rotor mounting cavity 12 can be quickly discharged from the oil drain port 18 to the oil pan 16 through the airflow of the rotor structure 3 itself, so as to avoid the accumulation of oil in the rotor mounting cavity 12 and prevent the rotor structure 3 from generating oil churning loss.

[0064] There are two oil drain ports 18, which are located at both ends of the rotor mounting cavity 12. The cooling oil at both ends of the rotor mounting cavity 12 can be discharged to the oil pan 16 through the two oil drain ports 18, so that the oil in the rotor mounting cavity 12 can be discharged quickly.

[0065] The present invention also proposes a vehicle.

[0066] The vehicle according to the present invention includes the motor assembly 100 of any of the above embodiments. The motor assembly 100 can be used as a power source in the vehicle to provide power to the transmission structure and other components in the vehicle. The motor assembly 100 includes: a motor housing 1, a stator structure 2, a rotor structure 3, and a sealing structure 4. By setting the rotor structure 3 to drive the fan blades 31 to drive the airflow toward the sealing structure 4 while rotating, the air pressure allows the sealing structure 4 to press the stator structure 2 tightly, improving the sealing performance at the connection between the stator structure 2 and the rotor structure 3. This prevents the cooling oil in the stator mounting cavity 11 from leaking from the connection between the stator structure 2 and the rotor structure 3, thereby improving the cooling effect of the stator structure 2. The overall structure is simple, has good sealing performance, and good performance.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A motor assembly, characterized in that, include: An electric motor housing, wherein a stator mounting cavity and a rotor mounting cavity are formed within the electric motor housing; The stator structure and the rotor structure are provided, wherein the stator structure is installed in the stator mounting cavity, the rotor structure is installed in the rotor mounting cavity, and the rotor structure is nested within the stator structure and is rotatable relative to the stator structure. A sealing structure is provided, which is sealed between the stator structure and the rotor structure, and the sealing structure separates the stator mounting cavity and the rotor mounting cavity. The rotor structure is provided with a drive fan blade at its axial end. The drive fan blade is adapted to drive the airflow to the sealing structure when the rotor structure rotates so that the sealing structure presses against the stator structure.

2. The motor assembly according to claim 1, characterized in that, The rotor structure has a balance plate at its axial end, and the drive fan blades are located on the radial outer side of the balance plate. When the rotor structure rotates, the drive airflow flows radially outward.

3. The motor assembly according to claim 2, characterized in that, The driving fan blades are multiple, and the multiple driving fan blades are distributed at intervals along the circumference of the balance plate.

4. The motor assembly according to claim 3, characterized in that, An airflow cavity is formed between two adjacent drive blades, the airflow cavity is open in a direction away from the centerline of the rotor structure, and the airflow cavity extends circumferentially along the rotor structure.

5. The motor assembly according to claim 2, characterized in that, The drive fan blade is configured to extend radially or to extend along an arc.

6. The motor assembly according to claim 2, characterized in that, The sealing structure includes a first sealing element and a second sealing element, which are respectively installed at both axial ends of the stator structure.

7. The motor assembly according to claim 6, characterized in that, Both the first and second sealing elements are constructed as sealing sleeves. A first limiting portion is formed on the inner circumference of the stator structure, and a second limiting portion is provided inside the motor housing. The first limiting portion and the second limiting portion are distributed opposite to each other along the axial direction of the stator structure. One axial end of the sealing sleeve is limited and engaged with the first limiting portion, and the other axial end is limited and engaged with the second limiting portion.

8. The motor assembly according to claim 1, characterized in that, The motor housing is provided with a liquid inlet and a liquid outlet, which are spaced apart along the axial direction of the stator structure, and are respectively connected to the stator mounting cavity.

9. The motor assembly according to claim 8, characterized in that, The motor housing is provided with an oil pan, and an oil storage chamber is formed inside the oil pan. The rotor mounting cavity is provided with an oil drain port on the side near the oil pan, and the oil drain port is connected to the oil storage chamber.

10. A vehicle, characterized in that, The motor assembly included in any one of claims 1-9.

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