Motor, power assembly and vehicle

Abstract

The utility model relates to a motor, a power assembly and a vehicle. The motor comprises a shell, a stator assembly and a liquid blocking ring. The shell is provided with a containing cavity and a liquid inlet communicated with the containing cavity; the stator assembly is arranged in the accommodating cavity and comprises a stator and a winding arranged on the stator, and the winding is provided with a sub-part protruding out of the axial end part of the stator; the liquid blocking ring is arranged in the containing cavity and located at the axial end of the stator, a containing groove with an opening facing the stator is formed in the liquid blocking ring, the sub-part extends into the containing groove, a notch is formed in the radial inner side of the liquid blocking ring, and the containing groove is communicated with the containing cavity through the notch. Through the technology, the cooling effect of the motor can be improved, and the oil stirring loss can be reduced.

Description

Technical Field

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

[0002] Motor cooling methods include indirect cooling and direct cooling. Indirect cooling primarily uses a coolant jacket installed on the outer wall of the stator to cool the motor. This coolant jacket only directly contacts the stator yoke, resulting in poor cooling of the windings and other parts of the stator. Direct cooling, on the other hand, involves circulating insulating coolant into the motor's internal space. This directly cools the windings, significantly improving cooling efficiency. However, this method exposes the coolant to the high-speed rotating rotor, leading to substantial oil churning losses and reduced motor efficiency. Utility Model Content

[0003] This application provides an electric motor that improves the cooling effect of the motor, thereby at least partially solving the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, an electric motor is provided, comprising:

[0005] The housing has a receiving cavity and a liquid inlet communicating with the receiving cavity;

[0006] A stator assembly disposed within the receiving cavity and including a stator and a winding disposed on the stator, the winding having a sub-part protruding from the axial end of the stator;

[0007] A liquid-retaining ring is disposed within the receiving cavity and located at the axial end of the stator. The liquid-retaining ring has an opening facing the receiving groove of the stator. The sub-part extends into the receiving groove. A notch is provided on the radially inner side of the liquid-retaining ring. The receiving groove communicates with the receiving cavity through the notch.

[0008] Optionally, the liquid-blocking ring is also provided with an inflow hole that connects the receiving groove and the liquid inlet.

[0009] Optionally, a sealing cavity is formed between the radial outer side of the liquid-retaining ring, the housing, and the axial end of the stator. The receiving groove communicates with the sealing cavity through the inlet hole, and the sealing cavity communicates with the liquid inlet.

[0010] Optionally, a first protrusion is provided on the radially outer side of the liquid-retaining ring, and the sealing cavity is formed by the first protrusion, the radially outer side of the liquid-retaining ring, the housing, and the axial end of the stator.

[0011] Optionally, the housing has a boss located on the axial side of the first protrusion away from the sealing cavity, and a first sealing element is provided between the boss and the first protrusion.

[0012] Optionally, a second protrusion is further provided on the radially outer side of the liquid-blocking ring. The second protrusion is located between the first protrusion and the boss. The first seal has a first groove with an opening facing the liquid-blocking ring, and the second protrusion extends into the first groove.

[0013] Optionally, a second seal is provided between the liquid-retaining ring and the axial end of the stator.

[0014] Optionally, the motor further includes a rotor assembly, the stator assembly being located radially outward of the rotor assembly, the rotor assembly being rotatably disposed within the receiving cavity and located inside the stator assembly, the rotor assembly being provided with a first channel configured to supply liquid to the receiving tank through the notch.

[0015] Optionally, the rotor assembly includes a rotor and a shaft, the rotor being sleeved on the shaft, the first channel including a first sub-channel and a second sub-channel that are interconnected, the first sub-channel being disposed inside the shaft, the second sub-channel being disposed inside the rotor, the second sub-channel having a liquid outlet that is oriented toward the notch.

[0016] Optionally, the first sub-channel includes a first hole extending axially along the rotating shaft and a second hole extending radially along the rotating shaft, the first hole communicating with the second hole.

[0017] Optionally, the rotor includes a body and a magnetic shield, the magnetic shield being located at one axial end of the body, and the second sub-channel being at least partially enclosed by the magnetic shield and one axial end of the body.

[0018] Optionally, the radially outer end face of the magnetic shielding plate is the first end face, and the liquid outlet of the second sub-channel is located on the first end face.

[0019] Optionally, the second sub-channel includes a connected second groove and a third hole, the second groove also communicating with the first sub-channel, the second groove being formed by a partial indentation of the axial inner surface of the magnetic shielding plate, and the third hole being an oblique hole extending from the axial inner surface of the magnetic shielding plate to the first end face.

[0020] Optionally, the second sub-channel further includes a third groove formed by a partial indentation of the radially inner surface of the body, the third groove extending axially along the shaft and communicating with the first sub-channel and the second groove respectively.

[0021] Optionally, the liquid outlet of the second sub-channel is inclined to the radial direction of the rotating shaft.

[0022] Optionally, the radially inner side of the baffle ring is located on one axial side of the rotor assembly, and the notch is formed between the radially inner side of the baffle ring and the rotor assembly.

[0023] Optionally, the outlet of the first channel is connected to the notch.

[0024] Optionally, the inner radial side of the liquid-retaining ring is located on one axial side of the stator assembly, and the notch is formed between the inner radial side of the liquid-retaining ring and the stator assembly.

[0025] According to a second aspect of this application, a powertrain is provided, including the motor as described above.

[0026] According to a third aspect of this application, a vehicle is provided, including the electric motor or the powertrain described above.

[0027] In the motor of this application embodiment, through the above-described technical solution, the coolant outside the housing can sequentially enter the receiving groove of the baffle ring located in the receiving cavity through the inlet and notch. Since the baffle ring partially surrounds the winding assembly (i.e., the baffle ring partially surrounds the assembly), the lower part of the winding extends into the receiving groove. Thus, the coolant flowing into the receiving groove can directly contact the winding and provide concentrated cooling, improving the motor's cooling effect. Simultaneously, by controlling the amount of coolant flowing into the receiving groove, the coolant can accumulate in the receiving groove, ensuring that the winding is at least partially immersed in the coolant, further achieving immersion cooling of the winding, increasing the coolant coverage of the stator, significantly improving the motor's cooling effect, and increasing the motor's power density and torque density. Thanks to the baffle ring partially surrounding the assembly, this immersion cooling method does not require the coolant to fill the entire receiving cavity, thus facilitating the control of oil churning losses in the motor.

[0028] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0029] 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.

[0030] 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.

[0031] Figure 1 This is an internal sectional view of the motor provided in an exemplary embodiment of this application;

[0032] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0033] Figure 3 yes Figure 2 Enlarged schematic diagram of part B in the middle;

[0034] Figure 4 yes Figure 1 Left view of the middle stator;

[0035] Figure 5 yes Figure 1 Left view of the middle baffle ring;

[0036] Figure 6 This is a schematic diagram of the structure of the motor provided in an exemplary embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the powertrain provided in an exemplary embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the vehicle structure provided in an exemplary embodiment of this application. Figure 1 ;

[0039] Figure 9 This is a schematic diagram of the vehicle structure provided in an exemplary embodiment of this application. Figure 2 .

[0040] Explanation of reference numerals in the attached figures:

[0041] 10. Electric motor;

[0042] 1. Shell; 101. Shell body; 102. Cover;

[0043] 11. Receiving cavity; 12. Liquid inlet; 13. Boss; 14. Third channel; 141. First sub-segment; 142. Second sub-segment; 143. Third sub-segment; 15. Fifth groove; 16. Liquid storage cavity; 17. Liquid outlet;

[0044] 2. Stator assembly; 21. Stator; 211. Stator yoke; 2111. Second channel; 212. Stator tooth; 22. Winding; 221. Sub-section;

[0045] 3. Liquid-retaining ring; 301. Base plate; 302. First side plate; 303. Second side plate;

[0046] 31. Receiving groove; 32. Inlet hole; 33. Sealing cavity; 331. First seal; 3311. First groove; 332. Second seal; 34. First protrusion; 35. Second protrusion; 36. Notch; 37. Outlet hole;

[0047] 4. Rotor assembly;

[0048] 401, First Passage;

[0049] 411, First sub-channel; 4111, First hole; 4112, Second hole;

[0050] 412, Second sub-channel; 4121, Second groove; 4122, Third hole; 4123, Third groove;

[0051] 41. Shaft;

[0052] 42. Rotor; 421. Body;

[0053] 422, Magnetic shielding plate; 4221, First end face;

[0054] 5. Reinforcing bars; 51. Fourth groove;

[0055] 6. Bearing; 61. First bearing; 62. Second bearing;

[0056] 7. Liquid guide plate; 71. First liquid passage hole; 72. Second liquid passage hole;

[0057] 20. Driving components;

[0058] 30. Connecting pipe;

[0059] 40. Cooler;

[0060] 100. Powertrain;

[0061] 1000, Vehicles. Detailed Implementation

[0062] 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.

[0063] According to the first aspect of this application, referring to Figures 1 to 6This application provides an electric motor 10, which includes a housing 1, a stator assembly 2, and a liquid-retaining ring 3. The housing 1 has a receiving cavity 11 and a liquid inlet 12 communicating with the receiving cavity 11; the stator assembly 2 is disposed in the receiving cavity 11 and includes a stator 21 and a winding 22 disposed on the stator 21, the winding 22 having a sub-part 221 protruding from the axial end of the stator 21; the liquid-retaining ring 3 is disposed in the receiving cavity 11 and located on the axial end of the stator 21, the liquid-retaining ring 3 has a receiving groove 31 with an opening facing the stator 21, the sub-part 221 extending into the receiving groove 31, and a notch 36 is provided on the radially inner side of the liquid-retaining ring 3, the receiving groove 31 communicating with the receiving cavity 11 through the notch 36.

[0064] The housing 1 has a receiving cavity 11, meaning the housing 1 defines the receiving cavity 11. The stator assembly 2 and the liquid-retaining ring 3 are both disposed within the housing 1, specifically within the receiving cavity 11. The housing 1 also has a liquid inlet 12, which communicates with the receiving cavity 11, allowing coolant from outside the housing 1 to enter the receiving cavity 11 through the liquid inlet 12. As an example, the coolant includes cooling oil. It should be noted that the number of liquid inlets 12 can be one or more.

[0065] The stator assembly 2 is the stationary part of the motor 10. The stator assembly 2 includes a stator 21 and windings 22, wherein the windings 22 are disposed on the stator 21, i.e., the windings 22 are connected to the stator 21. The stator 21 is also called the stator core; optionally, the stator core is made of laminated silicon steel sheets. The windings 22 are also called stator windings; optionally, the stator windings are made of high-strength enameled wire or flat copper wire. The stator assembly 2 has radial and axial dimensions. For an example, please refer to [reference needed]. Figure 1 The radial direction of stator assembly 2 is the X-axis direction, and the axial direction of stator assembly 2 is the Y-axis direction. When winding 22 is disposed on stator 21, a portion of winding 22 typically protrudes from the axial end of stator 21; this portion of winding 22 protruding from the axial end of stator 21 is called sub-part 221. Here, the axial end of stator 21 refers to the end of stator 21 in the axial direction of stator assembly 2. Typically, stator 21 has two opposing ends in the axial direction of stator assembly 2, thus stator 21 has two opposing axial ends. Optionally, a portion of winding 22 protrudes from both axial ends of stator 21.

[0066] The liquid-retaining ring 3 is located on the axial end of the stator 21, and the liquid-retaining ring 3 also forms a receiving groove 31. The opening of the receiving groove 31 faces the stator 21, so that a portion of the winding 22 provided on the stator 21 extends into the receiving groove 31, specifically, the sub-part 221 of the winding 22 extends into the receiving groove 31, thereby surrounding a portion of the winding 22 with the liquid-retaining ring 3. The liquid-retaining ring 3 also has a notch 36; specifically, the notch 36 is provided on the radially inner side of the liquid-retaining ring 3. The liquid-retaining ring 3 has two opposite sides in the radial direction of the stator assembly 2, namely a radially inner side and a radially outer side, wherein the radially inner side of the liquid-retaining ring 3 refers to the side of the liquid-retaining ring 3 closer to the center of the stator assembly 2, while the radially outer side of the liquid-retaining ring 3 is the side of the liquid-retaining ring 3 away from the center of the stator assembly 2. As an example, the radially outer side of the liquid-retaining ring 3 is closer to the housing 1 than the radially inner side of the liquid-retaining ring 3. The notch 36 on the liquid-retaining ring 3 connects the receiving groove 31 and the receiving cavity 11, so that the coolant can flow into the receiving groove 31 through the notch 36 and cool the sub-section 221 in the receiving groove 31.

[0067] With the above settings, the first flow path of the coolant in the motor 10 is specifically: inlet 12 → notch 36 → receiving tank 31.

[0068] Through the above technical solution, the coolant outside the housing 1 can sequentially enter the receiving groove 31 of the baffle ring 3 located in the receiving cavity 11 through the inlet 12 and the notch 36. Since the baffle ring 3 partially surrounds the winding 22 (i.e., the baffle ring 3 partially surrounds the winding 22), the sub-section 221 of the winding 22 extends into the receiving groove 31. In this way, the coolant flowing into the receiving groove 31 can directly contact the winding 22 and provide concentrated cooling to the winding 22, thereby improving the cooling effect of the motor 10. At the same time, by controlling the amount of coolant flowing into the receiving groove 31, the coolant can be made to accumulate in the receiving groove 31, so that the winding 22 is at least partially immersed in the coolant, further realizing immersion cooling of the winding 22, increasing the coolant coverage of the stator 21, significantly improving the cooling effect of the motor 10, and increasing the power density and torque density of the motor 10. Thanks to the partially enclosing liquid-retaining ring 3 around the winding 22, this immersion cooling method for the winding 22 does not require the coolant to fill the entire receiving cavity 11, thus facilitating the control of oil churning losses in the motor 10. Furthermore, the motor 10 has a simple structure, which helps reduce the assembly difficulty of the motor 10, thereby controlling the production cost of the motor 10.

[0069] In some implementations, refer to Figures 1 to 5 The liquid-blocking ring 3 is also provided with an inflow hole 32 that connects the receiving groove 31 and the liquid inlet 12.

[0070] The baffle ring 3 is also provided with an inflow hole 32, which connects to the receiving groove 31, allowing coolant to flow into the receiving groove 31 through the inflow hole 32. Furthermore, the inflow hole 32 also connects to the inlet 12, allowing coolant outside the housing 1 to enter the baffle ring 3 located in the receiving cavity 11, specifically into the receiving groove 31 on the baffle ring 3, through the inlet 12 and the inflow hole 32. It should be noted that the number of inflow holes 32 can be one or more. As an example, the inflow hole 32 is a through hole extending through the baffle ring 3.

[0071] Thus, the second flow path of the coolant in the motor 10 is specifically: inlet 12 → inlet hole 32 → receiving tank 31.

[0072] By providing the inlet hole 32, the amount of coolant flowing into the receiving tank 31 can be increased, thereby improving the efficiency of cooling the sub-section 221.

[0073] In some implementations, refer to Figures 2 to 4 The outer radial side of the liquid-retaining ring 3, the housing 1 and the axial end of the stator 21 form a sealing cavity 33. The receiving groove 31 is connected to the sealing cavity 33 through the inflow hole 32, and the sealing cavity 33 is connected to the liquid inlet 12.

[0074] Here, the sealed cavity 33 refers to the fact that, except for a specific inlet and outlet, the other parts of the sealed cavity 33 are sealed, which makes it easy to adjust the pressure inside the sealed cavity 33 by adjusting the amount of coolant flowing into and out of the sealed cavity 33.

[0075] Typically, the sealing cavity 33 is located outside the liquid-retaining ring 3, with the radially outer side of the liquid-retaining ring 3 forming the cavity wall of the sealing cavity 33. The receiving groove 31 is located inside the liquid-retaining ring 3, with the inner surface of the liquid-retaining ring 3 forming the groove wall of the receiving groove 31. The sealing cavity 33 and the receiving groove 31 are independent of each other. Specifically, the sealing cavity 33 is also connected to the inlet hole 32 and the liquid inlet 12, respectively, and the receiving groove 31 is connected to the liquid inlet 12 through the sealing cavity 33.

[0076] Thus, the second flow path of the coolant in the motor 10 is specifically: inlet 12 → sealing cavity 33 → inlet hole 32 → receiving groove 31.

[0077] Through the above technical solution, the pressure inside the sealing cavity 33 can be adjusted by regulating the amount of coolant flowing into and into the sealing cavity 33. For example, increasing the amount of coolant flowing into the sealing cavity 33 can increase the pressure inside the sealing cavity 33. Under the action of greater pressure, the coolant inside the sealing cavity 33 can be sprayed into the receiving groove 31 through the inflow hole 32, thereby spraying and cooling the sub-section 221 inside the receiving groove 31, improving the coolant coverage of the winding 22, and improving the cooling effect of the motor 10.

[0078] In some implementations, refer to Figures 2 to 4The outer radial side of the liquid-retaining ring 3 is provided with a first protrusion 34, and the sealing cavity 33 is formed by the first protrusion 34, the outer radial side of the liquid-retaining ring 3, the housing 1 and the axial end of the stator 21.

[0079] The liquid-retaining ring 3 has a first protrusion 34 protruding on its radially outer side. The first protrusion 34 abuts against the housing 1, and the liquid-retaining ring 3 abuts against the axial end of the stator 21. As an example, the first protrusion 34 is a convex ring.

[0080] Through the above technical solution, the sealing cavity 33 is defined by the liquid-blocking ring 3, the first protrusion 34, the housing 1 and the axial end of the stator 21. In particular, the setting of the first protrusion 34 is beneficial to increasing the volume of the sealing cavity 33 on the one hand, and to improving the sealing effect of the sealing cavity 33 on the other hand.

[0081] In some implementations, refer to Figures 1 to 4 The stator 21 includes a stator yoke 211 and a stator tooth 212 connected together. The winding 22 is disposed on the stator tooth 212. The stator yoke 211 is connected to the housing 1. The liquid baffle ring 3 is connected to the housing 1 and the stator yoke 211 and together defines the sealing cavity 33. The receiving groove 31 communicates with the sealing cavity 33 through the inlet hole 32. The sealing cavity 33 communicates with the liquid inlet 12.

[0082] For example, see Figure 4 The stator 21 is cylindrical, and the stator yoke 211 and stator teeth 212 are distributed sequentially along the radial direction of the stator assembly 2. There are multiple stator teeth 212, and all stator teeth 212 are distributed circumferentially along the inner side of the stator yoke 211, with stator slots defined between two adjacent stator teeth 212.

[0083] The winding 22 is disposed on the stator 21, specifically on the stator teeth 212. As an example, the winding 22 is wound on the stator teeth 212, with a portion of the winding 22 located inside the stator slot and a portion of the winding 22 located outside the stator slot. The portion of the winding 22 located outside the stator slot is typically formed as a sub-section 221 and exposed at both ends of the stator 21.

[0084] The stator yoke 211 is connected to the housing 1 to fix the position of the stator 21. As an example, the stator yoke 211 is bonded, plugged in or interference-fitted to the housing 1.

[0085] The liquid-retaining ring 3 is connected to the housing 1, and also to the stator yoke 211. Together, they define the sealing cavity 33. By using the stator yoke 211 of the stator 21 as the cavity wall of the sealing cavity 33, the stator teeth 212 are avoided, reducing the sealing difficulty of the sealing cavity 33.

[0086] In some implementations, refer to Figures 1 to 5The stator yoke 211 has a second channel 2111, which passes through the stator yoke 211 along the axial direction of the stator 21. The winding 22 has two sub-parts 221 protruding from both ends of the axial direction of the stator 21. There are two liquid-retaining rings 3, which are respectively set on two opposite axial ends of the stator 21. The sub-parts 221 and the liquid-retaining rings 3 are arranged in a one-to-one correspondence. There are two sealing cavities 33, which are connected by the second channel 2111. One of the sealing cavities 33 is connected to the liquid inlet 12.

[0087] As an example, there are two sub-parts 221 on a single winding 22, referred to as the first sub-part and the second sub-part, respectively. The first sub-part protrudes from one axial end of the stator 21, and the second sub-part protrudes from the other axial end of the stator 21. There are two liquid-retaining rings 3, referred to as the first liquid-retaining ring and the second liquid-retaining ring, respectively. The first liquid-retaining ring corresponds to the first sub-part, and the first sub-part is received in the receiving groove 31 (i.e., the first receiving groove) on the first liquid-retaining ring. The second liquid-retaining ring corresponds to the second sub-part, and the second sub-part is received in the receiving groove 31 (i.e., the second receiving groove) on the second liquid-retaining ring. One liquid-retaining ring 3, together with the housing 1 and the stator yoke 211, defines a sealing cavity 33. That is, there are also two sealing cavities 33. Specifically, the first liquid-retaining ring, together with one end of the housing 1 and the stator yoke 211, defines the first sealing cavity, and the second liquid-retaining ring, together with the other end of the housing 1 and the stator yoke 211, defines the second sealing cavity. The first sealing cavity is connected to the first receiving tank through the inflow hole 32 (i.e., the first inflow hole) on the first liquid-blocking ring. The second sealing cavity is connected to the second receiving tank through the inflow hole 32 (i.e., the second inflow hole) on the second liquid-blocking ring. The first sealing cavity and the second sealing cavity are connected through the second channel 2111 on the stator yoke 211. The first sealing cavity is connected to the liquid inlet 12.

[0088] Thus, the second flow path of the coolant in the motor 10 can be divided into two sub-flow paths. One sub-flow path is: inlet 12 → first sealing cavity → first inlet hole → first receiving groove; the other sub-flow path is: inlet 12 → first sealing cavity → second channel 2111 → second sealing cavity → second inlet hole → second receiving groove.

[0089] Through the above technical solution, the coolant can further flow through the second channel 2111 on the stator yoke 211, thereby cooling the stator yoke 211.

[0090] The number of second channels 2111 can be one or more. Optionally, there can be multiple second channels 2111, all of which are distributed circumferentially on the stator yoke 211, thereby improving the cooling effect on the stator yoke 211. The second channel 2111 can be a through hole provided on the stator yoke 211, or it can be a groove formed by the recess of the surface of the stator yoke 211 that contacts the housing 1.

[0091] Of course, in other embodiments, the second channel 2111 may not be provided, the two sealing cavities 33 may not be connected, and the two sealing cavities 33 may be connected to the liquid inlet 12 respectively.

[0092] In some embodiments, the stator yoke 211 and the stator teeth 212 are integrally formed, and the stator yoke 211 is interference-fitted with the housing 1.

[0093] In some implementations, refer to Figure 2 and Figure 3 The housing 1 has a boss 13, which is located on the axial side of the first protrusion 34 away from the sealing cavity 33, and a first sealing member 331 is provided between the boss 13 and the first protrusion 34.

[0094] By utilizing the above technical solution, the boss 13 and the first protrusion 34 limit the first seal 331, further reducing the risk of displacement of the first seal 331 and improving the reliability of sealing the sealing cavity 33. The first seal 331 is located outside the sealing cavity 33, reducing the risk of contact between the first seal 331 and the coolant.

[0095] In some implementations, refer to Figure 2 and Figure 3 The outer radial side of the liquid-blocking ring 3 is also provided with a second protrusion 35, which is located between the first protrusion 34 and the boss 13. The first sealing member 331 has a first groove 3311 with an opening facing the liquid-blocking ring 3, and the second protrusion 35 extends into the first groove 3311.

[0096] It is understood that the first protrusion 34, the second protrusion 35, and the boss 13 are distributed sequentially along the direction away from the sealing cavity 33. By extending the second protrusion 35 into the first groove 3311 on the first seal 331, the first seal 331 is further limited.

[0097] In some implementations, refer to Figure 2 and Figure 3 A second seal 332 is provided between the liquid-retaining ring 3 and the axial end of the stator 21.

[0098] Through the above technical solution, the setting of the second sealing element 332 can effectively improve the sealing performance of the sealing cavity 33, thereby better regulating the pressure inside the sealing cavity 33.

[0099] In some embodiments, the second seal 332 is a silicone or rubber component, and the first seal 331 is a silicone or rubber component.

[0100] In some implementations, refer to Figure 1 The motor 10 also includes a rotor assembly 4, and a stator assembly 2 is located on the radial outer side of the rotor assembly 4. The rotor assembly 4 is rotatably disposed in the receiving cavity 11 and located inside the stator assembly 2. The rotor assembly 4 is provided with a first channel 401, which is configured to supply liquid to the receiving groove 31 through a notch 36.

[0101] The rotor assembly 4 is the rotating part of the motor 10. The rotor assembly 4 also has radial and axial aspects; typically, the radial direction of the rotor assembly 4 coincides with the radial direction of the stator assembly 2, and the axial direction of the rotor assembly 4 coincides with the axial direction of the stator assembly 2. In the motor 10, the rotor assembly 4 is rotatably disposed within the receiving cavity 11, arranged from the center to the edge of the motor 10. The rotor assembly 4 and the stator assembly 2 are distributed sequentially, with the stator assembly 2 located radially outside the rotor assembly 4, and the rotor assembly 4 located radially inside the stator assembly 2.

[0102] The rotor assembly 4 is provided with a first channel 401, which is configured to supply coolant to the receiving tank 31 through the notch 36. Thus, the first flow path of the coolant in the motor 10 is more specifically: inlet 12 → first channel 401 → notch 36 → receiving tank 31.

[0103] With the above technical solution, when the rotor assembly 4 rotates, the coolant flows through the first channel 401 under the action of centrifugal force. It can not only cool the rotor assembly 4, but also throw the coolant out of the rotor assembly 4 through the first channel 401. The thrown-out coolant can splash into the receiving groove 31 through the notch 36 and cool the winding 22 in the receiving groove 31, thereby forming a composite cooling structure of semi-enclosed cooling of stator 21 plus liquid throwing of rotor assembly 4.

[0104] In some implementations, refer to Figure 1 The rotor assembly 4 specifically includes a rotating shaft 41 and a rotor 42. The rotor 42 is sleeved on the rotating shaft 41. The first channel 401 includes a first sub-channel 411 and a second sub-channel 412 that are interconnected. The first sub-channel 411 is disposed inside the rotating shaft 41, and the second sub-channel 412 is disposed inside the rotor 42. The second sub-channel 412 has a liquid outlet, and the liquid outlet of the second sub-channel 412 is disposed toward the notch 36.

[0105] As an example, the rotating shaft 41 extends into the receiving cavity 11 and is rotatably mounted on the housing 1. The rotor 42 is mounted on the rotating shaft 41 and located within the receiving cavity 11. The stator assembly 2 is fixedly connected to the housing 1, and the stator 21 corresponds to the rotor 42 and is located on the side of the rotor 42 away from the rotating shaft 41. In this way, the rotor assembly 4 can rotate relative to the stator assembly 2, and the rotor assembly 4 and the stator assembly 2 cooperate with each other to realize the conversion of electrical energy into mechanical energy.

[0106] The first flow path of the coolant in the motor 10 is more specifically: inlet 12 → first sub-channel 411 → second sub-channel 412 → notch 36 → receiving tank 31.

[0107] Thus, when the rotating shaft 41 drives the rotor 42 to rotate, the coolant flows through the first sub-channel 411 and the second sub-channel 412 under the action of centrifugal force, which can cool the rotating shaft 41 and the rotor 42. Moreover, the coolant can be thrown out of the rotor 42 through the second sub-channel 412, and the thrown coolant can splash into the receiving tank 31 and cool the winding 22 in the receiving tank 31.

[0108] In some implementations, refer to Figure 1 The first sub-channel 411 includes a first hole 4111 extending axially along the shaft 41 and a second hole 4112 extending radially along the shaft 41, with the first hole 4111 and the second hole 4112 communicating with each other.

[0109] It can be understood that the first sub-channel 411 includes a first hole 4111 and a second hole 4112, and the flow path of the coolant in the first sub-channel 411 is specifically from the first hole 4111 to the second hole 4112.

[0110] As an example, a first hole 4111 extends from one end face of the rotating shaft 41 along the axial direction of the rotating shaft 41 into the interior of the rotating shaft 41, and a second hole 4112 extends from the outer peripheral surface of the rotating shaft 41 along the radial direction of the rotating shaft 41 into the interior of the rotating shaft 41 and communicates with the first hole 4111. Optionally, there is one first hole 4111 and multiple second holes 4112, all of which communicate with the first hole 4111.

[0111] In some implementations, refer to Figure 1 The rotor 42 includes a body 421 and a magnetic shielding plate 422. The magnetic shielding plate 422 is located on one axial end of the body 421. The second sub-channel 412 is at least partially formed by the magnetic shielding plate 422 and one axial end of the body 421.

[0112] As an example, the magnetic shielding plate 422 is disposed on the rotating shaft 41 and cooperates with the axial end of the body 421. A first sub-channel 411 communicating with the liquid inlet 12 is formed on the rotating shaft 41, and a second sub-channel 412 communicating with the first sub-channel 411 is formed on the rotor 42.

[0113] In some implementations, refer to Figure 1 The outer radial end face of the magnetic shielding plate 422 is the first end face 4221, and the outlet of the second sub-channel 412 is located on the first end face 4221. This arrangement allows the outlet of the second sub-channel 412 to be closer to the notch 36 on the stator assembly 2, facilitating the flow of coolant into the receiving groove 31. The outer radial end face of the magnetic shielding plate 422 refers to the surface of the magnetic shielding plate 422 near the stator assembly 2 in the radial direction of the rotor assembly 4.

[0114] In some implementations, refer to Figure 1 The second sub-channel 412 includes a connected second groove 4121 and a third hole 4122. The second groove 4121 is also connected to the first sub-channel 411. The second groove 4121 is formed by a partial indentation of the axial inner surface of the magnetic shielding plate 422, and the third hole 4122 is an oblique hole extending from the axial inner surface of the magnetic shielding plate 422 to the first end face 4221.

[0115] The axial inner surface of the magnetic shielding plate 422 refers to the side surface of the magnetic shielding plate 422 closest to the body 421 in the axial direction of the rotor assembly 4. The second sub-channel 412 includes a communicating second groove 4121 and a third hole 4122. The second groove 4121 communicates with the first sub-channel 411, and the outlet of the third hole 4122 faces the notch 36. The second groove 4121 is formed by a partial indentation of the axial inner surface of the magnetic shielding plate 422, and the third hole 4122 is an oblique hole that penetrates the magnetic shielding plate 422 through the axial inner surface of the magnetic shielding plate 422 and extends to the first end face 4221.

[0116] It is understood that the second sub-channel 412 includes a second groove 4121 and a third hole 4122. The flow path of the coolant in the second sub-channel 412 is specifically from the second groove 4121 to the third hole 4122. The third hole 4122 is an oblique hole, which throws the coolant into the receiving groove 31, thereby allowing the coolant to better coat the winding 22.

[0117] In some implementations, refer to Figure 1 The second sub-channel 412 also includes a third groove 4123 formed by a partial indentation of the radial inner surface of the body 421. The third groove 4123 extends along the axial direction of the rotating shaft 41 and communicates with the first sub-channel 411 and the second groove 4121 respectively.

[0118] That is, the second sub-channel 412 also includes a third groove 4123, which is formed by a partial indentation of the radially inner surface of the body 421, and the third groove 4123 communicates with the first sub-channel 411. As an example, the third groove 4123 extends along the axial direction of the rotating shaft 41 and communicates with the second hole 4112.

[0119] The body 421 is fitted onto the rotating shaft 41. The radial inner surface of the body 421 refers to the surface closer to the rotating shaft 41 in the radial direction of the rotor assembly 4.

[0120] It is understood that the second sub-channel 412 includes a third groove 4123, which is connected to the first sub-channel 411, such as the second hole 4112. Usually, the number of third grooves 4123 is equal to the number of second holes 4112. When there are multiple second holes 4112, there are also multiple third grooves 4123.

[0121] It should be noted that the third groove 4123 may or may not penetrate the main body 421. As an example, when there is one magnetic shielding plate 422, one end of the third groove 4123 extends to one end face of the main body 421 and communicates with the second groove 4121 on the magnetic shielding plate 422, while the other end of the third groove 4123 is located inside the main body 421. When there are two magnetic shielding plates 422, both ends of the third groove 4123 extend to both end faces of the main body 421 and communicate with the second groove 4121 on different magnetic shielding plates 422.

[0122] When the first sub-channel 411 includes a first hole 4111 and a second hole 4112, and the second sub-channel 412 includes a second groove 4121, a third hole 4122 and a third groove 4123, the first flow path of the coolant in the motor 10 is specifically as follows: inlet 12 → first hole 4111 → second hole 4112 → third groove 4123 → second groove 4121 → third hole 4122 → notch 36 → receiving groove 31.

[0123] In some implementations, please refer to Figure 1 The outlet of the second sub-channel 412 is inclined in the radial direction of the rotating shaft 41. This facilitates the throwing of coolant into the receiving tank 31 through the notch 36. As an example, the angle between the outlet of the second sub-channel 412 and the radial direction of the rotating shaft 41 is 30° to 60°, such as 30°, 35°, 40°, 45°, 50°, 55° or 60°.

[0124] In some implementations, please refer to Figure 1 When there are two liquid-blocking rings 3, there are also two magnetic shielding plates 422. The two magnetic shielding plates 422 are respectively set at both ends of the axial direction of the body 421. The two magnetic shielding plates 422 cooperate with both ends of the axial direction of the body 421 to form two second grooves 4121 and two third holes 4122. The two second grooves 4121 are connected to the receiving grooves 31 on different liquid-blocking rings 3 through the two third holes 4122.

[0125] In some implementations, refer to Figure 1 The inner radial side of the baffle ring 3 is located on one axial side of the rotor assembly 4, and a notch 36 is formed between the inner radial side of the baffle ring 3 and the rotor assembly 4.

[0126] In this configuration, the radially inner side of the baffle ring 3 extends to one axial side of the rotor assembly 4; that is, the radially inner side of the baffle ring 3 corresponds to the rotor assembly 4 axially. A notch 36 is formed between the radially inner side of the baffle ring 3 and the rotor assembly 4. As an example, the radially inner side of the baffle ring 3 is spaced apart from the rotor assembly 4, thus forming the notch 36.

[0127] With the above configuration, on the one hand, the baffle ring 3 can be placed closer to the rotor assembly 4, making it easier to collect the coolant flowing out of the first channel 401 on the rotor assembly 4. On the other hand, since the radially inner side of the baffle ring 3 extends to one axial side of the rotor assembly 4, the receiving groove 31 on the baffle ring 3 can be made larger, thereby accommodating a larger volume sub-section 221. Furthermore, with the above configuration, a seal is not required between the radially inner side of the baffle ring 3 and the stator 21, reducing process requirements while ensuring cooling performance. The coolant located in the receiving groove 31 can also flow out of the receiving groove 31 through the notch 36.

[0128] In some implementations, refer to Figure 1 The outlet of the first channel 401 is connected to the notch 36. In this way, the coolant flowing out of the outlet of the first channel 401 can flow completely or almost completely into the receiving tank 31 through the notch 36, ensuring the cooling effect.

[0129] In some implementations, refer to Figure 1 The inner radial side of the liquid-retaining ring 3 is located on one axial side of the stator assembly 2, and a notch 36 is formed between the inner radial side of the liquid-retaining ring 3 and the stator assembly 2.

[0130] In this configuration, the radially inner side of the baffle ring 3 extends to one axial side of the stator assembly 2; that is, the radially inner side of the baffle ring 3 corresponds to the stator assembly 2 in the axial direction of the stator assembly 2. A notch 36 is formed between the radially inner side of the baffle ring 3 and the stator assembly 2. As an example, the radially inner side of the baffle ring 3 is spaced apart from the stator assembly 2, thereby forming the notch 36.

[0131] As an example, refer to Figure 1The liquid-retaining ring 3 includes an integrally formed base plate 301, a first side plate 302, and a second side plate 303. Along the radial direction of the stator assembly 2, the first side plate 302 and the second side plate 303 are sequentially spaced on the same side surface of the base plate 301 and together with the base plate 301 define a receiving groove 31. The length of the second side plate 303 is greater than the length of the first side plate 302. The second side plate 303 is connected to the stator 21. The first side plate 302 is spaced apart from the stator 21 and defines a notch 36.

[0132] The base plate 301, the first side plate 302, and the second side plate 303 are integrally formed. The first side plate 302 and the second side plate 303 can be welded to the base plate 301, or they can be integrally molded. The base plate 301, the first side plate 302, and the second side plate 303 together define a receiving groove 31. The base plate 301 forms the bottom wall of the receiving groove 31, and the first side plate 302 and the second side plate 303 form the side walls of the receiving groove 31. The second side plate 303 is connected to the stator 21. As an example, the free end of the second side plate 303 away from the base plate 301 abuts against the stator yoke 211 on the stator 21.

[0133] In some embodiments, the liquid-retaining ring 3 is spaced apart from the magnetic shielding plate 422 to prevent interference between the liquid-retaining ring 3 and the magnetic shielding plate 422 during the rotation of the shaft 41. Optionally, one end of the magnetic shielding plate 422 with a first end face 4221 extends into or is close to the notch 36. As an example, the magnetic shielding plate 422 is configured to correspond to the notch 36, specifically, the first end face 4221 of the magnetic shielding plate 422 is configured to correspond to the notch 36.

[0134] In some implementations, please refer to Figure 1 There are two liquid-retaining rings 3, located at opposite axial ends of the stator 21. One liquid-retaining ring 3 has its radially inner side located on one axial side of the rotor assembly 4, forming a notch 36 between its radially inner side and the rotor assembly 4. The other liquid-retaining ring 3 has its radially inner side located on one axial side of the stator assembly 2, also forming a notch 36 between its radially inner side and the stator assembly 2. Correspondingly, the winding 22 has two sub-parts 221 protruding from both axial ends of the stator 21. One sub-part 221 is a welding part, and the other sub-part 221 is a hairpin part. The welding part and the hairpin part have different sizes. The larger of the two parts is located in the receiving groove 31 of the liquid-retaining ring 3 on the radially inner side of the rotor assembly 4, and the smaller of the two parts is located in the receiving groove 31 of the liquid-retaining ring 3 on the radially inner side of the stator assembly 2.

[0135] In some implementations, refer to Figure 1The motor 10 also includes a surrounding rib 5 protruding from the housing 1 and located in the receiving cavity 11. The surrounding rib 5 is arranged around the rotating shaft 41 and spaced apart from the rotating shaft 41. The surrounding rib 5, the housing 1 and the rotating shaft 41 together define the fourth groove 51. The motor 10 also includes a bearing 6, which is sleeved on the rotating shaft 41 and received in the fourth groove 51. The fourth groove 51 is connected to the liquid inlet 12.

[0136] Thus, the third flow path of the coolant in the motor 10 is specifically: inlet 12 → fourth groove 51.

[0137] Through the above technical solution, the coolant outside the housing 1 can flow into the fourth groove 51 through the inlet 12 and cool the bearing 6 located in the fourth groove 51.

[0138] In some implementations, refer to Figures 1 to 5 A third channel 14, independent of the receiving cavity 11, is formed on the shell 1. The third channel 14 connects the liquid inlet 12 and the receiving cavity 11, and the inlet hole 32 is also connected to the third channel 14.

[0139] In other words, the receiving cavity 11 is connected to the liquid inlet 12 through the third channel 14, and the inlet hole 32 is also connected to the liquid inlet 12 through the third channel 14. By setting the third channel 14, the restriction on the position of the liquid inlet 12 can be reduced.

[0140] In some implementations, refer to Figure 1 The housing 1 includes a housing body 101 and a cover 102. The cover 102 is connected to the housing body 101 and defines a receiving cavity 11.

[0141] By connecting the shell body 101 and the cover body 102 to form the shell 1, the manufacturing difficulty of the shell 1 can be reduced on the one hand, and the difficulty of installing the stator assembly 2 and the liquid baffle ring 3 inside the shell 1 can be reduced on the other hand, thus reducing the production cost of the motor 10.

[0142] In some implementations, refer to Figure 1 The stator 21 and the liquid-retaining ring 3 are connected to the shell body 101.

[0143] The stator 21 and the liquid-retaining ring 3 are connected to the housing 1 specifically to the housing body 101 in the housing 1. In this way, when assembling the motor 10, the stator 21 and the liquid-retaining ring 3 can be assembled together with the housing body 101 first, and then the cover 102 can be placed on the housing body 101.

[0144] In some implementations, refer to Figure 1The liquid inlet 12 is opened on the cover 102. The third channel 14 includes a first sub-segment 141 and a second sub-segment 142 that are connected. The first sub-segment 141 is formed on the cover 102, and the second sub-segment 142 is formed on the shell body 101. The first sub-segment 141 is connected to the liquid inlet 12, and the second sub-segment 142 is connected to the receiving cavity 11 and the inflow hole 32.

[0145] When the cover 102 is placed on the shell body 101, the first sub-segment 141 and the second sub-segment 142 are connected. Thus, the liquid inlet 12 → inflow hole 32 in the second flow path is specifically: liquid inlet 12 → first sub-segment 141 → second sub-segment 142 → inflow hole 32.

[0146] In some implementations, refer to Figure 1 In the case where the motor 10 also includes a rotating shaft 41 and bearings 6, there are two bearings 6, namely a first bearing 61 and a second bearing 62. One end of the rotating shaft 41 is rotatably connected to the cover 102 through the first bearing 61, and the other end is rotatably connected to the shell body 101 through the second bearing 62. The third channel 14 also includes a third sub-section 143, which is formed on the shell body 101 and communicates with the second sub-section 142. The third sub-section 143 is used to supply coolant to the second bearing 62.

[0147] It is understood that in the above configuration, the first bearing 61 is located on the cover 102, and the second bearing 62 is located on the shell body 101. The third flow path includes at least one sub-flow path that supplies coolant to the second bearing 62, and the sub-flow path is specifically: inlet 12 → first sub-segment 141 → second sub-segment 142 → third sub-segment 143 → fourth groove 51.

[0148] In some implementations, refer to Figure 1 The cover 102 has a fifth groove 15 with its opening facing the receiving cavity 11. The fifth groove 15 is close to the first bearing 61. The liquid inlet 12 is connected to the first sub-segment 141 through the fifth groove 15. The motor 10 also includes a liquid guide plate 7. The liquid guide plate 7 is disposed on the cover 102 to close the opening of the fifth groove 15. The liquid guide plate 7 has a first liquid passage hole 71 corresponding to the first bearing 61. The first liquid passage hole 71 is used to supply coolant to the first bearing 61.

[0149] It is understood that the third flow path includes at least one sub-flow path supplying coolant to the first bearing 61. This sub-flow path is specifically: inlet 12 → fifth groove 15 → first through hole 71 → fourth groove 51. Furthermore, the fifth groove 15 allows the inlet 12 → first sub-segment 141 in both the second and third flow paths to specifically be: inlet 12 → fifth groove 15 → first sub-segment 141. Therefore, this arrangement allows the second and third flow paths to share the same inlet 12 and fifth groove 15, reducing the number of inlets 12 and simplifying the design of the motor 10.

[0150] In some implementations, refer to Figure 1 The rotating shaft 41 is provided with a first sub-channel 411, and the liquid guide plate 7 is provided with a second liquid passage hole 72, which is connected to the first sub-channel 411.

[0151] Thus, the liquid inlet 12 → first sub-channel 411 in the first flow path is specifically: liquid inlet 12 → fifth groove 15 → second liquid passage 72 → first sub-channel 411. Therefore, by setting it up as described above, the second flow path, the first flow path, and the third flow path can all share the same liquid inlet 12 and the fifth groove 15, reducing the number of liquid inlets 12 and reducing the design difficulty of the motor 10.

[0152] As an example, the central region of the liquid guide plate 7 is formed into a funnel-shaped structure, and the second liquid passage 72 is located at the lowest point of the funnel-shaped structure, thereby guiding the coolant to flow to the second liquid passage 72.

[0153] In some implementations, refer to Figure 1 and Figure 5 The liquid-retaining ring 3 is also provided with an outflow hole 37 that connects the receiving groove 31 and the receiving cavity 11.

[0154] By setting the outflow hole 37, the coolant in the receiving tank 31 can flow out of the receiving tank 31 and into the receiving cavity 11, thereby carrying away the heat on the winding 22 and achieving cooling of the winding 22.

[0155] For example, see Figure 5 The liquid-retaining ring 3 includes a base plate 301, a first side plate 302, and a second side plate 303, with an outlet hole 37 formed on the base plate 301. The number of outlet holes 37 can be one or more.

[0156] In some implementations, refer to Figure 1 The housing 1 is also provided with a liquid storage chamber 16 that communicates with the receiving cavity 11. When the motor 10 is in normal working condition, the liquid storage chamber 16 is located below the gravity of the receiving cavity 11.

[0157] It can be understood that the liquid storage chamber 16 being located below the gravity of the receiving chamber 11 means that the liquid storage chamber 16 is closer to the ground than the receiving chamber 11. In this way, the coolant flowing out of the receiving tank 31 and into the receiving chamber 11 can further flow into the liquid storage chamber 16 under the action of gravity.

[0158] In addition, the coolant flowing into the fourth groove 51 can also flow into the receiving cavity 11 through the slot of the fourth groove 51, and further into the liquid storage cavity 16.

[0159] In some implementations, refer to Figure 1 and Figure 6 The housing 1 is provided with an outlet 17 that connects to the liquid storage chamber 16. The motor 10 also includes a drive component 20, a connecting pipe 30 and a cooler 40 provided on the housing 1. The connecting pipe 30 connects the outlet 17 and the inlet 12. The drive component 20 is configured to drive the coolant to flow from the outlet 17 to the inlet 12. The cooler 40 is configured to cool the coolant flowing through the connecting pipe 30.

[0160] As an example, drive unit 20 includes a pump, such as an oil pump. Cooler 40 can be a liquid-cooled cooler or an air-cooled cooler.

[0161] With the above configuration, the coolant can circulate within the motor 10 and continuously cool the motor 10, effectively controlling the temperature of the motor 10 during operation. Specifically, the coolant flowing into the reservoir 16 is transferred to the inlet 12 through the connecting pipe 30 under the action of the drive component 20. During the transfer process, the cooler 40 exchanges heat with the coolant, causing the coolant temperature to decrease. This allows the coolant to continue cooling the motor 10 in the next circulation cycle and remove heat from the motor 10.

[0162] In other words, the first, second, and third flow paths of the coolant are all circulating cooling paths.

[0163] As an example, the first flow path is as follows: inlet 12 → fifth groove 15 → second through hole 72 → first hole 4111 → second hole 4112 → third groove 4123 → second groove 4121 → third hole 4122 → notch 36 → receiving groove 31 → outflow hole 37 (or notch 36) → receiving cavity 11 → storage cavity 16 → outlet 17 → connecting pipe 30 → inlet 12.

[0164] As an example, the second flow path is as follows: inlet 12 → fifth groove 15 → first sub-segment 141 → second sub-segment 142 → sealing cavity 33 → inlet hole 32 → receiving groove 31 → outlet hole 37 (or notch 36) → receiving cavity 11 → storage cavity 16 → outlet 17 → connecting pipe 30 → inlet 12.

[0165] As an example, the third flow path is as follows: inlet 12 → fifth groove 15 → first sub-segment 141 → second sub-segment 142 → third sub-segment 143 → fourth groove 51 → receiving cavity 11 → storage cavity 16 → outlet 17 → connecting pipe 30 → inlet 12.

[0166] According to a second aspect of this application, a powertrain 100 is provided, with reference to... Figure 7 The powertrain 100 includes the motor 10 as described above. The powertrain 100 has all the beneficial effects of the motor 10 described above, which will not be repeated here.

[0167] According to a third aspect of this application, a vehicle 1000 is provided, with reference to... Figure 8 and Figure 9 The vehicle 1000 includes the motor 10 as described above or the powertrain 100 as described above. The vehicle 1000 has all the beneficial effects of the motor 10 or the powertrain 100 described above, which will not be repeated here.

[0168] The vehicle 1000 can be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions on it.

[0169] 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.

[0170] 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.

[0171] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0172] 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 (10), characterized in that, include: The housing (1) has a receiving cavity (11) and a liquid inlet (12) communicating with the receiving cavity (11); A stator assembly (2) is disposed within the receiving cavity (11) and includes a stator (21) and a winding (22) disposed on the stator (21), the winding (22) having a sub-part (221) protruding from the axial end of the stator (21); A liquid-retaining ring (3) is disposed in the receiving cavity (11) and located on the axial end of the stator (21). The liquid-retaining ring (3) forms a receiving groove (31) with an opening facing the stator (21). The sub-part (221) extends into the receiving groove (31). A notch (36) is provided on the radial inner side of the liquid-retaining ring (3). The receiving groove (31) communicates with the receiving cavity (11) through the notch (36).

2. The motor (10) according to claim 1, characterized in that, The liquid-blocking ring (3) is also provided with an inflow hole (32) that connects the receiving groove (31) and the liquid inlet (12).

3. The motor (10) according to claim 2, characterized in that, A sealing cavity (33) is formed between the radial outer side of the liquid-blocking ring (3), the housing (1), and the axial end of the stator (21). The receiving groove (31) communicates with the sealing cavity (33) through the inlet hole (32). The sealing cavity (33) communicates with the liquid inlet (12).

4. The motor (10) according to claim 3, characterized in that, The liquid-blocking ring (3) has a first protrusion (34) on its radial outer side, and the sealing cavity (33) is formed by the first protrusion (34), the radial outer side of the liquid-blocking ring (3), the housing (1), and the axial end of the stator (21).

5. The motor (10) according to claim 4, characterized in that, The housing (1) has a boss (13) located on the axial side of the first protrusion (34) away from the sealing cavity (33), and a first seal (331) is provided between the boss (13) and the first protrusion (34).

6. The motor (10) according to claim 5, characterized in that, The outer radial side of the liquid-blocking ring (3) is also provided with a second protrusion (35), which is located between the first protrusion (34) and the boss (13). The first sealing member (331) has a first groove (3311) with an opening facing the liquid-blocking ring (3), and the second protrusion (35) extends into the first groove (3311).

7. The motor (10) according to claim 3, characterized in that, A second seal (332) is provided between the liquid-retaining ring (3) and the axial end of the stator (21).

8. The motor (10) according to any one of claims 1 to 7, characterized in that, The motor (10) further includes a rotor assembly (4), the stator assembly (2) is located on the radially outer side of the rotor assembly (4), the rotor assembly (4) is rotatably disposed in the receiving cavity (11) and located inside the stator assembly (2), the rotor assembly (4) is provided with a first channel (401), the first channel (401) is configured to supply liquid to the receiving groove (31) through the notch (36).

9. The motor (10) according to claim 8, characterized in that, The rotor assembly (4) includes a rotor (42) and a rotating shaft (41). The rotor (42) is sleeved on the rotating shaft (41). The first channel (401) includes a first sub-channel (411) and a second sub-channel (412) that are interconnected. The first sub-channel (411) is disposed inside the rotating shaft (41), and the second sub-channel (412) is disposed inside the rotor (42). The second sub-channel (412) has a liquid outlet, and the liquid outlet of the second sub-channel (412) is disposed facing the notch (36).

10. The motor (10) according to claim 9, characterized in that, The first sub-channel (411) includes a first hole (4111) extending axially along the shaft (41) and a second hole (4112) extending radially along the shaft (41), the first hole (4111) and the second hole (4112) communicating with each other.

11. The motor (10) according to claim 9, characterized in that, The rotor (42) includes a body (421) and a magnetic shielding plate (422), the magnetic shielding plate (422) being located on one axial end of the body (421), and the second sub-channel (412) being formed by at least part of the magnetic shielding plate (422) and one axial end of the body (421).

12. The motor (10) according to claim 11, characterized in that, The radially outer end face of the magnetic shielding plate (422) is the first end face (4221), and the liquid outlet of the second sub-channel (412) is located on the first end face (4221).

13. The motor (10) according to claim 12, characterized in that, The second sub-channel (412) includes a connected second groove (4121) and a third hole (4122). The second groove (4121) is also connected to the first sub-channel (411). The second groove (4121) is formed by a partial indentation of the axial inner surface of the magnetic shielding plate (422). The third hole (4122) is an oblique hole extending from the axial inner surface of the magnetic shielding plate (422) to the first end face (4221).

14. The motor (10) according to claim 13, characterized in that, The second sub-channel (412) further includes a third groove (4123) formed by a partial indentation of the radially inner surface of the body (421), the third groove (4123) extending axially along the shaft (41) and communicating with the first sub-channel (411) and the second groove (4121) respectively.

15. The motor (10) according to claim 9, characterized in that, The liquid outlet of the second sub-channel (412) is inclined to the radial direction of the rotating shaft (41).

16. The motor (10) according to claim 8, characterized in that, The inner radial side of the liquid-retaining ring (3) is located on one axial side of the rotor assembly (4), and the notch (36) is formed between the inner radial side of the liquid-retaining ring (3) and the rotor assembly (4).

17. The motor (10) according to claim 16, characterized in that, The outlet of the first channel (401) is connected to the notch (36).

18. The motor (10) according to any one of claims 1 to 7, characterized in that, The inner radial side of the liquid-retaining ring (3) is located on one axial side of the stator assembly (2), and the notch (36) is formed between the inner radial side of the liquid-retaining ring (3) and the stator assembly (2).

19. A powertrain (100), characterized in that, Includes the motor (10) as described in any one of claims 1 to 18.

20. A vehicle (1000), characterized in that, Includes the motor (10) as described in any one of claims 1 to 18 or the powertrain (100) as described in claim 19.

Images