Liquid-cooled electric machine and vehicle

Abstract

The utility model relates to motor field discloses liquid cooling motor and carrier. Liquid cooling motor includes: casing, has two opposite settings end cap, stator, establishes in the casing, rotor, rotatably sets up in the inside of stator, isolating bushing, is sleeved between stator and rotor, and the both ends of isolating bushing are connected with corresponding end cap respectively, at least one end cap is equipped with the annular groove of isolating bushing placement, sealing element, including first sealing part and second sealing part, first sealing part clamps and sets up between the outside wall of isolating bushing and the outer ring wall of annular groove, second sealing part clamps and sets up between the inside wall of isolating bushing and the inner ring wall of annular groove. First sealing part and second sealing part exert pressure from the inside and outside of isolating bushing, form radial clamping force, make sealing element and isolating bushing form sealing effect, the pressure of the inside and outside of isolating bushing can offset each other, need not isolating bushing deformation pressure tightly to realize the close adhesion of sealing part, avoid the problem that the thin wall leads to the poor sealing in traditional structure.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a liquid-cooled motor and its carrier. Background Technology

[0002] In the existing technology, motor cooling methods include air cooling, but air cooling has poor cooling performance and cannot meet the heat dissipation requirements of high torque and high speed motors, becoming one of the factors that limit the performance of motors.

[0003] To overcome the limitations of air cooling, related technologies have proposed a direct oil cooling method. This involves installing an isolation sleeve between the stator and rotor of the motor, separating them into independent spaces, and then circulating cooling oil into the space containing the stator to lower its temperature. The ends of the isolation sleeve need to form a seal with the motor's end covers; however, the sealing effect between the isolation sleeve and the end covers in these technologies is often poor. Utility Model Content

[0004] In view of this, the present invention provides a liquid-cooled motor and carrier to solve or improve the problem of poor sealing effect between the isolation sleeve and the end cover in the related art.

[0005] In a first aspect, this utility model provides a liquid-cooled motor, comprising: The housing has two oppositely positioned end caps; The stator is located inside the housing; The rotor is rotatably disposed inside the stator; An isolation sleeve is fitted between the stator and the rotor, and both ends of the isolation sleeve are respectively connected to the corresponding end caps. At least one end cap is provided with an annular groove for inserting the isolation sleeve. The sealing element includes a first sealing portion and a second sealing portion, wherein the first sealing portion is sandwiched between the outer side wall of the isolation sleeve and the outer ring wall of the annular groove, and the second sealing portion is sandwiched between the inner side wall of the isolation sleeve and the inner ring wall of the annular groove.

[0006] In one alternative embodiment, the seal further includes a connecting portion located at one end of both the first sealing portion and the second sealing portion near the bottom of the annular groove, and connecting the first sealing portion and the second sealing portion.

[0007] In one alternative embodiment, the connecting portion is an annular structure, and the connecting portion closes the annular opening formed by the first sealing portion and the second sealing portion.

[0008] In one optional embodiment, the first sealing portion has a plurality of axially arranged lips near the side wall of the isolation sleeve; And / or, the first sealing part has a plurality of axially arranged lips on the side wall opposite to the isolation sleeve.

[0009] In one optional embodiment, the second sealing portion has a plurality of axially arranged lips near the side wall of the isolation sleeve; And / or, the second sealing part has a plurality of axially arranged lips on the side wall opposite to the isolation sleeve.

[0010] In one optional embodiment, the stator is provided with stator slots, the slot openings of which face the rotor, and the outer peripheral wall of the isolation sleeve is provided with ribs, which are disposed within the stator slots.

[0011] In one optional embodiment, the stator slot has flanges extending towards each other and spaced apart on both sides of the slot opening. Along the direction from the bottom of the stator slot to the slot opening, the opposite end faces of the two flanges are close to each other. A rib is provided between the two flanges, and at least one side wall of the rib is inclined and adapted to the end face of the corresponding flange.

[0012] In one optional embodiment, the housing is provided with a first oil port and a second oil port, the space between one end of the stator and the corresponding end cover is in communication with the first oil port, and the space between the other end of the stator and the corresponding end cover is in communication with the second oil port.

[0013] In one optional embodiment, the first oil port and the second oil port are provided on both sides of the rotation axis of the rotor; Alternatively, the stator may be provided with oil passages that extend along the axial direction of the stator.

[0014] Secondly, this utility model also provides a carrier, including the liquid-cooled motor as described above.

[0015] The liquid-cooled motor provided by this utility model, under the limiting action of the annular groove, the first sealing part and the second sealing part respectively apply pressure from the inner and outer sides of the isolation sleeve to form a radial clamping force, so that the sealing element and the isolation sleeve form a sealing effect. At the same time, the pressure on the inner and outer sides of the isolation sleeve can cancel each other out, and the tight fit of the sealing part can be achieved without the isolation sleeve being deformed and pressed.

[0016] Furthermore, since the sealing pressure comes from the clamping of the sealing parts on both sides rather than the deformation of the isolation sleeve itself, even if the isolation sleeve wall is thin, the sealing effect can be guaranteed by balancing the pressure on both sides, avoiding the problem of poor sealing caused by thin walls in traditional structures.

[0017] In addition, the first sealing part and the second sealing part form two radially spaced sealing barriers in space, which can improve the sealing effect on the one hand, and on the other hand, even if one sealing part leaks or fails, the other sealing part can still ensure the seal, thereby improving the sealing reliability.

[0018] The vehicle provided by this utility model incorporates the liquid-cooled motor provided by this utility model, and therefore also incorporates all the above-mentioned advantages of the liquid-cooled motor. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of a liquid-cooled motor provided in an embodiment of this utility model; Figure 2 for Figure 1 A magnified view of part A in the diagram; Figure 3 A schematic diagram of another liquid-cooled motor provided in this embodiment of the present invention; Figure 4 A cross-sectional view of the sealing element provided in an embodiment of this utility model; Figure 5 for Figure 4 A magnified view of part B in the diagram; Figure 6 An isometric view of the sealing element provided in an embodiment of this utility model; Figure 7 A schematic diagram of the structure of the isolation sleeve provided in an embodiment of this utility model; Figure 8 for Figure 7 A magnified view of part of C; Figure 9 A schematic diagram showing the relative positions of the stator, rotor, and isolation sleeve within the housing, provided for an embodiment of this utility model; Figure 10 for Figure 9 Enlarged schematic diagram of part D Figure 11 A schematic diagram of the stator structure provided in an embodiment of this utility model; Figure 12 This is a schematic diagram of the stator slot and flange provided in an embodiment of the present utility model.

[0021] Explanation of reference numerals in the attached figures: 1. Housing; 101. Main body; 102. End cover; 1021. Annular groove; 103. First oil port; 104. Second oil port; 2. Stator; 201. Stator slot; 202. Flange; 203. Oil passage; 3. Rotor; 4. Isolation sleeve; 401. Rib; 5. Seal; 501. First sealing part; 502. Second sealing part; 503. Connecting part; 504. Lip. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] To overcome the limitations of air cooling, related technologies have proposed a direct oil cooling method, which involves setting up an isolation sleeve between the stator and rotor of the motor to separate the stator and rotor into an independent space, and then circulating cooling oil into the space where the stator is located to cool the stator.

[0024] The isolation sleeve needs to form a seal with the motor's end cover at both ends. Specifically, the inner wall of the end cover usually has an annular boss, the isolation sleeve is fitted onto the outside of the annular boss, and a sealing ring is provided between the isolation sleeve and the annular boss. However, due to the space and weight requirements of the motor, the wall thickness of the isolation sleeve is relatively small, making it difficult to effectively compress the sealing ring, resulting in poor sealing between the isolation sleeve and the end cover.

[0025] In order to solve or improve the problem of poor sealing effect between the isolation sleeve and the end cap in related technologies, this utility model provides a liquid-cooled motor and carrier.

[0026] The following is combined with Figures 1 to 12 This describes the liquid-cooled motor provided in the embodiments of the present invention.

[0027] Specifically, the motor includes a housing 1, a stator 2, a rotor 3, a cylinder, and an annular component.

[0028] The housing 1 has two oppositely arranged end caps 102. Optionally, the housing 1 also includes a main body 101, which has a cylindrical structure, and the two end caps 102 are respectively disposed at both ends of the main body 101. For example, both end caps 102 are screwed to the main body 101, or one of the two end caps 102 is screwed to the main body 101, and the other is integrally formed with the main body 101.

[0029] The stator 2 is disposed inside the housing 1. For example, the stator 2 can be interference-fitted, screwed or welded to the housing 1.

[0030] The rotor 3 is rotatably disposed inside the stator 2. Specifically, the rotor 3 is disposed inside the stator 2, and both ends of the rotor 3 are rotatably connected to the two end covers 102 respectively.

[0031] The isolation sleeve 4 is fitted between the stator 2 and the rotor 3, and both ends of the isolation sleeve 4 are connected to the corresponding end caps 102. At least one end cap 102 has an annular groove 1021 on its inner sidewall for inserting the isolation sleeve 4.

[0032] The sealing element 5 includes a first sealing portion 501 and a second sealing portion 502. The first sealing portion 501 is sandwiched between the outer wall of the isolation sleeve 4 and the outer annular wall of the annular groove 1021, and the second sealing portion 502 is sandwiched between the inner wall of the isolation sleeve 4 and the inner annular wall of the annular groove 1021. That is, both the first sealing portion 501 and the second sealing portion 502 are annular structures, with the first sealing portion 501 looping around the outer side of the isolation sleeve 4 and the second sealing portion 502 looping around the inner side of the isolation sleeve 4. Optionally, the sealing element 5 is made of rubber.

[0033] In this embodiment, under the limiting effect of the annular groove 1021, the first sealing part 501 and the second sealing part 502 apply pressure from the inner and outer sides of the isolation sleeve 4 respectively to form a radial clamping force, so that the sealing member 5 and the isolation sleeve 4 form a sealing effect. At the same time, the pressure on the inner and outer sides of the isolation sleeve 4 can cancel each other out, and the tight fit of the sealing part can be achieved without the isolation sleeve 4 being deformed and pressed.

[0034] Furthermore, since the sealing pressure comes from the clamping of the sealing parts on both sides rather than the deformation of the isolation sleeve 4 itself, even if the wall thickness of the isolation sleeve 4 is relatively thin, the sealing effect can be guaranteed by balancing the pressure on both sides, thus avoiding the problem of poor sealing caused by thin walls in traditional structures.

[0035] In addition, the first sealing part 501 and the second sealing part 502 form two sealing barriers that are radially spaced in space. On the one hand, this can improve the sealing effect, and on the other hand, even if one sealing part leaks or fails, the other sealing part can still ensure the seal, thereby improving the sealing reliability.

[0036] Optionally, refer to Figure 1 and Figure 3 As shown, both end caps 102 are provided with annular grooves 1021, and the two ends of the isolation sleeve 4 are respectively placed into the two annular grooves 1021, and each annular groove 1021 is provided with a sealing element 5.

[0037] In this embodiment, when both end caps 102 are provided with annular grooves 1021, and each annular groove 1021 is equipped with a sealing member 5 including a first sealing part 501 and a second sealing part 502, both ends of the isolation sleeve 4 can achieve double sealing and force balance, thereby ensuring the sealing performance between the two ends of the isolation sleeve 4 and the corresponding end caps 102, and reducing the risk of cooling oil leakage from either end of the isolation sleeve 4.

[0038] In addition, both ends of the isolation sleeve 4 are firmly clamped in the annular groove 1021 of the end cover 102, and the radial force is balanced, which can enhance the radial stability of the isolation sleeve 4, prevent the isolation sleeve 4 from shifting or vibrating in the radial direction, and improve the stability of the motor.

[0039] Of course, the isolation sleeve 4 is not limited to having both ends inserted into the annular groove 1021. For example, in some embodiments not shown, one end of the isolation sleeve 4 is inserted into the annular groove 1021, and an annular member is provided on the end face of the other end of the isolation sleeve 4. The annular member is arranged around the circumference of the isolation sleeve 4 and is designed as an elastic structure, such as a rubber member. The annular member abuts against the end cap 102 to form an axial seal.

[0040] In this embodiment, the annular component is arranged circumferentially along the end face of the isolation sleeve 4. During assembly, the axial clamping force between the end cap 102 and the isolation sleeve 4 causes the annular component to undergo elastic deformation, filling the gap between them to form a seal. In addition, the elastic design of the annular component can also take into account assembly error tolerance. For example, even if there is an axial dimensional deviation or parallelism deviation between the isolation sleeve 4 and the end cap 102, the sealing effect can be ensured through elastic compression, reducing the requirements for processing and assembly accuracy.

[0041] Alternatively, the annular component may be bonded, welded, or vulcanized to the isolation sleeve 4.

[0042] In some embodiments provided by this utility model, the sealing member 5 further includes a connecting portion 503. The connecting portion 503 is located at one end of both the first sealing portion 501 and the second sealing portion 502 near the bottom of the annular groove 1021, and connects the first sealing portion 501 and the second sealing portion 502.

[0043] In this embodiment, the connecting portion 503 makes the sealing member 5 have a U-shaped structure in cross-section, and the isolation sleeve 4 is placed inside the U-shaped structure. The isolation sleeve 4 can axially limit the connecting portion 503. For example, during the operation of the motor, under the limiting effect of the isolation sleeve 4, the sealing member 5 will not move axially or fall out of the annular groove 1021 due to vibration or oil pressure.

[0044] In some embodiments provided by this utility model, the connecting part 503 is an annular structure, and the connecting part 503 closes the annular opening formed by the first sealing part 501 and the second sealing part 502.

[0045] In this embodiment, the closed annular structure has high circumferential stiffness and compressive stability, which can improve the overall structural stability of the seal 5.

[0046] In addition, the isolation sleeve 4 can apply axial pressure to the connecting part 503, that is, the isolation sleeve 4 and the bottom of the annular groove 1021 squeeze the connecting part 503, causing the connecting part 503 to undergo elastic deformation and form an axial seal, thereby further improving the sealing reliability of the seal 5.

[0047] In addition, the connecting part 503 is elastic, which can take into account the assembly tolerance. For example, even if there is an axial dimension deviation or parallelism deviation between the isolation sleeve 4 and the end cover 102, the sealing effect can be ensured by elastic compression, reducing the requirements for processing and assembly accuracy.

[0048] In some embodiments provided by this utility model, the first sealing part 501 is provided with a plurality of lip bodies 504 arranged axially near the side wall of the isolation sleeve 4.

[0049] In this embodiment, the multiple lips 504 between the first sealing part 501 and the isolation sleeve 4 form a multi-stage seal, progressively reducing pressure and significantly minimizing leakage. Furthermore, the sealing force between the first sealing part 501 and the isolation sleeve 4 is shared by multiple lips 504, resulting in minimal wear on individual lips 504. Moreover, even with slight eccentricity or vibration of the isolation sleeve 4, some lips 504 remain in contact, reducing the likelihood of oil leakage and thus improving the reliability of the seal.

[0050] In some embodiments provided by this utility model, the first sealing part 501 is provided with a plurality of axially arranged lips 504 on the side wall away from the isolation sleeve 4.

[0051] In this embodiment, the multiple lips 504 between the first sealing part 501 and the outer annular wall of the annular groove 1021 can form a multi-stage seal, gradually reducing pressure and significantly decreasing leakage. Furthermore, the sealing force between the first sealing part 501 and the annular groove 1021 is shared by multiple lips 504, resulting in minimal wear on individual lips 504. In addition, even if the isolation sleeve 4 experiences slight eccentricity or vibration, some lips 504 remain in contact, reducing the likelihood of oil leakage and thus improving the reliability of the seal.

[0052] In some embodiments provided by this utility model, the second sealing part 502 is provided with a plurality of axially arranged lips 504 on the side wall near the isolation sleeve 4.

[0053] In this embodiment, the multiple lips 504 between the second sealing part 502 and the isolation sleeve 4 form a multi-stage seal, progressively reducing pressure and significantly minimizing leakage. Furthermore, the sealing force between the second sealing part 502 and the isolation sleeve 4 is shared by multiple lips 504, resulting in minimal wear on individual lips 504. Moreover, even with slight eccentricity or vibration of the isolation sleeve 4, some lips 504 remain in contact, reducing the likelihood of oil leakage and thus improving the reliability of the seal.

[0054] In some embodiments provided by this utility model, the second sealing part 502 is provided with a plurality of axially arranged lips 504 on the side wall away from the isolation sleeve 4.

[0055] In this embodiment, the multiple lips 504 between the second sealing part 502 and the inner annular wall of the annular groove 1021 can form a multi-stage seal, gradually reducing pressure and significantly reducing leakage. Furthermore, the sealing force between the second sealing part 502 and the annular groove 1021 is shared by multiple lips 504, resulting in less wear on individual lips 504. In addition, even if the isolation sleeve 4 experiences slight eccentricity or vibration, some lips 504 remain in contact, reducing the likelihood of oil leakage and thus improving the reliability of the seal.

[0056] Optionally, refer to Figure 2 As shown, the axial section of the lip 504 can be arc-shaped. An arc-shaped lip 504 increases the contact area between the lip 504 and the contact surface, thereby improving the sealing effect. Of course, the axial section of the lip 504 can also be triangular, trapezoidal, or rectangular. The axial section refers to the cutting surface arranged along the axis of the isolation sleeve 4.

[0057] In some embodiments of this invention, the isolation sleeve 4 is a plastic tube. For example, the material of the plastic tube includes, but is not limited to, oil-resistant plastics such as polytetrafluoroethylene, polyoxymethylene, and reinforced polypropylene.

[0058] In this embodiment, using a plastic cylinder can significantly reduce the weight of the isolation sleeve 4 itself, thereby reducing the overall weight of the motor. For weight-sensitive applications, such as new energy vehicles and drones, this helps improve the vehicle's energy efficiency, range, or load capacity.

[0059] In addition, plastic has electrical insulation properties, and as a separator between stator 2 and rotor 3, the plastic cylinder can avoid electromagnetic interference or short circuit risks.

[0060] refer to Figure 9 and Figure 10 As shown, in some embodiments provided by this utility model, the stator 2 is provided with a stator slot 201, the opening of the stator slot 201 faces the rotor 3, and the outer peripheral wall of the isolation sleeve 4 is provided with a rib 401, which is located inside the stator slot 201. Optionally, the rib 401 can be formed by extrusion or injection molding.

[0061] In this embodiment, the slot opening of the stator slot 201 faces the rotor 3, and the isolation sleeve 4 is fitted between the stator 2 and the rotor 3. The protruding rib 401 is embedded in the stator slot 201 to form a circumferential limiting structure, which can restrict the rotation of the isolation sleeve 4 in the circumferential direction and prevent the isolation sleeve 4 from being displaced relative to the stator 2 due to factors such as vibration and electromagnetic force during motor operation, thus ensuring the relative position of the isolation sleeve 4 and the stator 2 is stable.

[0062] In addition, the rib 401 can enhance the deformation resistance of the isolation sleeve 4 itself, and at the same time, it can obtain external support through cooperation with the stator slot 201, thereby improving the rigidity of the isolation sleeve 4.

[0063] Optionally, the number of ribs 401 is less than or equal to the number of stator slots 201.

[0064] refer to Figure 10 As shown, in some embodiments of this utility model, the stator slot 201 has flanges 202 extending towards each other and spaced apart on both sides of the slot opening. Along the direction from the bottom of the stator slot 201 to the slot opening, the opposing end faces of the two flanges 202 are close to each other. A rib 401 is disposed between the two flanges 202, and at least one sidewall of the rib 401 is inclined and adapted to the end face of the corresponding flange 202. That is, a conical groove is formed between the end faces of the two flanges 202, the rib 401 is a conical block, and the conical block is embedded in the conical groove.

[0065] Optionally, both sidewalls of the rib 401 are inclined and adapted to the end face of the corresponding flange 202.

[0066] In this embodiment, when inserting the isolation sleeve 4 into the stator 2, the isolation sleeve 4 is aligned with the inner hole of the stator 2, and the protruding rib 401 on the surface of the isolation sleeve 4 is aligned with the corresponding conical groove, and then the isolation sleeve 4 is pushed into the stator 2.

[0067] When the rib 401 is fully embedded between the two flanges 202, the side wall of the rib 401 fits tightly with the end face of the flange 202, forming a radial limit, which can effectively prevent the isolation sleeve 4 from deforming inward under the action of oil pressure, and ensure a safe clearance between the inner side of the isolation sleeve 4 and the rotor 3.

[0068] refer to Figure 1 and Figure 3 As shown, in some embodiments provided by this utility model, the housing 1 is provided with a first oil port 103 and a second oil port 104. The space between one end of the stator 2 and the corresponding end cover 102 is connected to the first oil port 103, and the space between the other end of the stator 2 and the corresponding end cover 102 is connected to the second oil port 104.

[0069] In this embodiment, by providing a first oil port 103 and a second oil port 104 at both ends of the stator 2, the cooling oil can be contacted at both ends of the stator 2, thereby ensuring the cooling effect on the stator 2.

[0070] Optionally, the first oil port 103 or the second oil port 104 can be provided on the main body 101 of the housing 1 or on the end cover 102.

[0071] refer to Figure 3 As shown, in some embodiments provided by this utility model, a first oil port 103 and a second oil port 104 are provided on both sides of the rotation axis of the rotor 3.

[0072] Specifically, a first oil port 103 is provided on both sides of the rotation axis of the rotor 3, with the first oil port 103 on one side serving as the oil inlet and the first oil port 103 on the other side serving as the oil outlet. A second oil port 104 is provided on both sides of the rotation axis of the rotor 3, with the second oil port 104 on one side serving as the oil inlet and the second oil port 104 on the other side serving as the oil outlet.

[0073] For example, one end of the rotor 3 is provided with two first oil ports 103, which are distributed on both sides of the rotation axis of the rotor 3. One of the two first oil ports 103 is an oil inlet, and the other is an oil outlet. The other end of the rotor 3 is provided with two second oil ports 104, which are distributed on both sides of the rotation axis of the rotor 3. One of the two second oil ports 104 is an oil inlet, and the other is an oil outlet.

[0074] In this embodiment, the cooling oil at both ends of the rotor 3 can circulate independently. When the motor is running, the heat intensity at both ends of the stator 2 may be different, and the oil circuits with independent circulation at both ends can control the oil flow rate, flow rate, and oil temperature respectively. For example, for the end with more severe heat generation, cooling can be enhanced by increasing the oil flow rate and lowering the oil temperature on that side; while for the end with less heat generation, the flow rate can be reduced to reduce energy consumption, achieving "on-demand heat dissipation".

[0075] Of course, the motor is not limited to setting the first oil port 103 and the second oil port 104 in the above manner, for example, refer to Figure 1 As shown, in other embodiments provided by this utility model, the stator 2 is provided with an oil passage 203, which is arranged to run through the axial direction of the stator 2.

[0076] In this embodiment, one of the first oil port 103 and the second oil port 104 serves as an oil inlet and the other as an oil outlet. Cooling oil enters one end of the stator 2 through the oil inlet, passes through the oil passage 203 of the stator 2, enters the other end of the stator 2, and is discharged through the oil outlet.

[0077] The main heat sources of stator 2 are the iron core and windings. The axially penetrating oil passage 203 can directly pass through the inside of the iron core or the gap between the windings, allowing the cooling oil to come into zero-distance contact with the heat-generating components. This makes heat exchange more direct and efficient, and avoids the problem of insufficient heat dissipation in the middle of stator 2. Especially for high power density motors, this can significantly reduce the maximum temperature of stator 2 and avoid performance degradation caused by local overheating.

[0078] This utility model embodiment also provides a vehicle, including but not limited to vehicles, ships and aircraft.

[0079] Specifically, the vehicle includes the motors described above.

[0080] It should be noted that the vehicle includes the motor, and therefore also includes all the advantages of the motor mentioned above, so this will not be elaborated further.

[0081] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A liquid-cooled motor, characterized in that, include: The housing (1) has two oppositely arranged end caps (102); The stator (2) is located inside the housing (1); The rotor (3) is rotatably disposed inside the stator (2); An isolation sleeve (4) is fitted between the stator (2) and the rotor (3), and the two ends of the isolation sleeve (4) are respectively connected to the corresponding end caps (102). At least one end cap (102) is provided with an annular groove (1021) for the isolation sleeve (4) to be inserted. The sealing element (5) includes a first sealing part (501) and a second sealing part (502). The first sealing part (501) is sandwiched between the outer side wall of the isolation sleeve (4) and the outer ring wall of the annular groove (1021), and the second sealing part (502) is sandwiched between the inner side wall of the isolation sleeve (4) and the inner ring wall of the annular groove (1021).

2. The liquid-cooled motor according to claim 1, characterized in that, The sealing element (5) further includes a connecting part (503), which is located at one end of the first sealing part (501) and the second sealing part (502) near the bottom of the annular groove (1021) and connects the first sealing part (501) and the second sealing part (502).

3. The liquid-cooled motor according to claim 2, characterized in that, The connecting part (503) has an annular structure, and the connecting part (503) closes the annular opening formed by the first sealing part (501) and the second sealing part (502).

4. The liquid-cooled motor according to claim 1, characterized in that, The first sealing part (501) has a plurality of lip bodies (504) arranged axially on the side wall near the isolation sleeve (4). And / or, the first sealing part (501) has a plurality of axially arranged lips (504) on the side wall away from the isolation sleeve (4).

5. The liquid-cooled motor according to claim 1, characterized in that, The second sealing part (502) has a plurality of lip bodies (504) arranged axially on the side wall near the isolation sleeve (4). And / or, the second sealing part (502) has a plurality of axially arranged lips (504) on the side wall away from the isolation sleeve (4).

6. The liquid-cooled motor according to any one of claims 1-5, characterized in that, The stator (2) is provided with a stator slot (201), the slot opening of the stator slot (201) faces the rotor (3), and the outer peripheral wall of the isolation sleeve (4) is provided with a rib (401), the rib (401) is provided in the stator slot (201).

7. The liquid-cooled motor according to claim 6, characterized in that, The stator slot (201) has flanges (202) extending towards each other and spaced apart on both sides of the slot opening. Along the direction from the bottom of the stator slot (201) to the slot opening, the opposite end faces of the two flanges (202) are close to each other. The rib (401) is located between the two flanges (202). At least one side wall of the rib (401) is inclined and adapted to the end face of the corresponding flange (202).

8. The liquid-cooled motor according to any one of claims 1-5, characterized in that, The housing (1) is provided with a first oil port (103) and a second oil port (104). The space between one end of the stator (2) and the corresponding end cover (102) is connected to the first oil port (103), and the space between the other end of the stator (2) and the corresponding end cover (102) is connected to the second oil port (104).

9. The liquid-cooled motor according to claim 8, characterized in that, The first oil port (103) and the second oil port (104) are provided on both sides of the rotation axis of the rotor (3). Alternatively, the stator (2) may be provided with an oil passage (203) which is provided to run through the stator (2) along its axial direction.

10. A vehicle, characterized in that, Including the liquid-cooled motor as described in any one of claims 1-9.

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