Motor and vehicle

Abstract

The utility model discloses a motor and a vehicle. The motor comprises a stator; the rotor is rotatably arranged in the stator, the rotor is provided with a first cooling flow channel, and the projection of the first cooling flow channel in the axial direction of the rotor extends in the axial direction; and the rotating shaft is arranged in the rotor, the rotating shaft is provided with a supply space, the supply space is provided with an exhaust port, and the exhaust port communicates with the first cooling flow channel so as to supply a cooling medium to the first cooling flow channel. According to the utility model, the first cooling flow channel extending along the axial direction is arranged in the rotor, so that the interior of the rotor is well cooled, the cooling range is enlarged, the cooling effect is improved, and the continuous large-current operation capability of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a motor and a vehicle. Background Art

[0002] In the related art, the rotor of the asynchronous motor has resistance. When current flows, the rotor becomes a heat source and generates a large amount of heat. In the related art, liquid cooling is used to cool the rotor, but the effect is poor. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a motor with improved cooling effect.

[0004] According to an embodiment of the utility model, the motor includes: a stator; a rotor, which is rotatably arranged in the stator, and the rotor is provided with a first cooling channel, and the projection of the first cooling channel in the axial direction of the rotor extends along the axial direction; a rotating shaft, which is arranged in the rotor, and the rotating shaft is provided with a supply space, and the supply space has a discharge port, and the discharge port is connected to the first cooling channel to supply cooling medium to the first cooling channel.

[0005] According to the motor of the embodiment of the utility model, by arranging a first cooling channel extending in the axial direction inside the rotor, the inside of the rotor is cooled better, the cooling range is increased, the cooling effect is improved, and the continuous high current operation capability of the motor is improved.

[0006] In some embodiments, the rotor is further provided with a second cooling channel, the second cooling channel extending in the radial direction of the rotor, the second cooling channel respectively connecting the exhaust port and the first cooling channel to supply the cooling medium to the first cooling channel.

[0007] In some embodiments, the rotor includes: a first punching plate group, the first punching plate group is composed of a plurality of stacked first punching plates, the first punching plates are provided with a flow channel groove, and the flow channel groove is configured as the second cooling flow channel; a second punching plate group, the second punching plate group is composed of a plurality of stacked second punching plates, the second punching plate group is stacked on the first punching plate group, the second punching plate is provided with a first through hole, the first through hole corresponds to the flow channel groove, and the first through hole is configured as the first cooling flow channel.

[0008] In some embodiments, the second punching sheet group is at least two groups, and the at least two groups of the second punching sheet group are arranged on opposite sides of the first punching sheet group.

[0009] In some embodiments, the motor also includes a guide bar, the first punching sheet is further provided with a second through hole, the second punching sheet is further provided with a third through hole, the third through hole corresponds to the second through hole, and the guide bar is passed through the second through hole and the third through hole; wherein, in the direction away from the center of the rotor, the width of the second through hole and / or the third through hole gradually increases.

[0010] In some embodiments, there are at least two second through holes, and the flow channel groove is disposed between two adjacent second through holes. There are at least two third through holes, and the first through hole is disposed between two adjacent third through holes.

[0011] In some embodiments, the motor further includes an end ring assembly, which is disposed at an end of the rotor, the stator includes a stator core and a stator winding, the stator winding is wound around the stator core, the rotor corresponds to the stator core, and the end ring assembly corresponds to the stator winding; wherein the end ring assembly is provided with an injection channel, the injection channel is connected to the first cooling channel, and the injection channel is directed toward the stator winding to spray the cooling medium toward the end of the stator winding.

[0012] In some embodiments, there are multiple injection channels, including a first injection channel and a second injection channel, and the end ring assembly includes: an end ring member, which is arranged at the end of the rotor, and the first injection channel is arranged on the end ring member, and an angle θ1 is set between the extension direction of the first injection channel and the central axis of the rotor; a cover plate, which is arranged on the end ring member, and the second injection channel is arranged on the cover plate, and an angle θ2 is set between the extension direction of the second injection channel and the central axis of the rotor, and θ2 is different from θ1.

[0013] In some embodiments, the end ring is integrally formed with the rotor, a circulation space is provided on the end ring, the circulation space is connected to the first cooling channel, the first injection channel is provided on the side of the end ring facing the stator winding, the first injection channel is connected to the circulation space, the cover plate is provided on the side of the circulation space away from the rotor to seal the circulation space, and the second injection channel is connected to the circulation space; wherein the end ring is connected to the cover plate by stir friction welding.

[0014] A vehicle according to an embodiment of the utility model includes the above-mentioned motor.

[0015] According to the vehicle of the embodiment of the utility model, a first cooling channel extending in the axial direction is provided inside the rotor, so that the inside of the rotor is cooled better, the cooling range is increased, the cooling effect is improved, and the continuous high current operation capability of the motor is improved.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 The cross-sectional view of the motor in the embodiment of the utility model Figure 1 ;

[0019] Figure 2 for Figure 1 The appearance of the transfer shaft;

[0020] Figure 3 A top view of the first punching sheet in the embodiment of the utility model;

[0021] Figure 4 A top view of the second punching sheet in the embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the positions of the first punching sheet and the second punching sheet in the embodiment of the utility model;

[0023] Figure 6 The cross-sectional view of the motor in the embodiment of the utility model Figure 2 ;

[0024] Figure 7 for Figure 6 The local enlarged view of point I in the middle;

[0025] Figure 8 It is a schematic diagram of the positions of the guide bars and the end rings in the embodiment of the utility model;

[0026] Fig. 9 It is a schematic diagram of the positions of the rotor, the end ring and the cover plate in the embodiment of the utility model;

[0027] Fig.10 This is an appearance diagram of the motor in the embodiment of the utility model;

[0028] Fig.11 It is a schematic diagram of the buffer space in the embodiment of the utility model.

[0029] Reference numerals:

[0030] 100. Motor;

[0031] 10. stator; 11. stator core; 12. stator winding;

[0032] 20. rotor; 21. first cooling channel; 22. second cooling channel; 23. first punching plate; 231. channel groove; 232. second through hole; 24. second punching plate; 241. first through hole; 242. third through hole;

[0033] 30. Rotating shaft; 31. Supply space; 32. Discharge port; 33. Oil inlet pipe; 34. Buffer space;

[0034] 40. End ring assembly; 41. Injection channel; 411. First injection channel; 412. Second injection channel; 42. End ring member; 421. Flow space; 43. Cover plate; 50. Guide strip. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Unless otherwise specified, the front-to-back direction in this application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0039] Reference below Figure 1-Figure 10 A motor 100 according to an embodiment of the present invention is described.

[0040] Reference Figure 1 , Figure 2 According to an embodiment of the present invention, a motor 100 includes a stator 10 , a rotor 20 and a rotating shaft 30 .

[0041] The rotor 20 is rotatably disposed in the stator 10. The rotor 20 is provided with a first cooling channel 21. The projection of the first cooling channel 21 in the axial direction of the rotor 20 extends in the axial direction. The rotating shaft 30 is disposed in the stator 10. The rotating shaft 30 is provided with a supply space 31. The supply space 31 has a discharge port 32. The discharge port 32 is connected to the first cooling channel 21 to supply cooling medium to the first cooling channel 21.

[0042] The stator 10 generates a rotating magnetic field, and the rotor 20 rotates in the rotating magnetic field to realize the operation of the motor 100. The rotating shaft 30 is installed in the rotor 20, and the rotating shaft 30 rotates synchronously with the rotor 20. The supply space 31 on the rotating shaft 30 has a discharge port 32 connected to the first cooling channel 21. The supply space 31 can discharge the cooling medium into the first cooling channel 21, and the cooling medium cools the rotor 20.

[0043] The cooling medium may be cooling oil.

[0044] In the related art, the rotor of the asynchronous motor has resistance. When current flows, the rotor becomes a heat source and generates a large amount of heat. In the related art, liquid cooling is used to cool the rotor, but the effect is poor.

[0045] Especially in the case of high current, the rotor will heat up seriously, which may cause irreversible plastic deformation of the rotor outer diameter under high temperature and high speed. In severe cases, it may result in "sweeping" of the rotor inner diameter with the stator, and eventually the motor will burn out.

[0046] In the embodiment of the utility model, the first cooling channel 21 is arranged inside the rotor 20. The cooling medium flowing in the first cooling channel 21 can better cool the inside of the rotor 20, and the projection of the first cooling channel 21 in the axial direction of the rotor 20 extends along the axial direction. That is to say, the cooling range of the first cooling channel 21 is not limited to a single plane perpendicular to the axial direction. The cooling range of the first cooling channel 21 extends in the axial direction to increase the cooling range. For example, the first cooling channel 21 can pass through the entire rotor 20 in the axial direction, thereby cooling the rotor 20 as a whole and improving the cooling effect.

[0047] It should be noted that the projection of the first cooling channel 21 in the axial direction of the rotor 20 extends in the axial direction, that is, the first cooling channel 21 can extend strictly in the axial direction, or can be set to have an angle with the axial direction, or the first cooling channel 21 extends along a curve to increase the cooling range of the first cooling channel 21 in the axial direction.

[0048] According to the motor 100 of the embodiment of the utility model, by setting a first cooling channel 21 extending in the axial direction inside the rotor 20, the inside of the rotor 20 is better cooled, the cooling range is increased, the cooling effect is improved, and the continuous high current operation capability of the motor 100 is improved.

[0049] In some embodiments, the stator 10 includes a stator core 11 and a stator winding 12 , and the stator winding 12 is wound in stator slots of the stator core 11 .

[0050] Reference Figure 1 In some embodiments, the rotor 20 is further provided with a second cooling channel 22 , which extends in the radial direction of the rotor 20 , and the second cooling channel 22 is respectively connected to the exhaust port 32 and the first cooling channel 21 to supply cooling medium to the first cooling channel 21 .

[0051] The second cooling channel 22 is disposed between the first cooling channel 21 and the discharge port 32 , and the second cooling channel 22 extends along the radial direction of the rotor 20 , thereby increasing the cooling range in the radial direction.

[0052] In the above solution, by providing the second cooling channel 22 extending in the radial direction, the cooling range of the cooling medium is further increased, and the overall cooling effect is improved.

[0053] Specifically, the second cooling channel 22 may extend strictly in the radial direction, or may be arranged to have an angle with the radial direction, or the second cooling channel 22 may extend along a curve to increase the cooling range of the second cooling channel 22 in the radial direction.

[0054] Reference Figure 3 , Figure 4 and Figure 5 In some embodiments, the rotor 20 includes: a first punching sheet 23 and a second punching sheet 24 .

[0055] The first punching plate 23 is provided with a channel groove 231, which is configured as the second cooling channel 22. The second punching plate 24 is stacked on the first punching plate 23, and is provided with a first through hole 241, which corresponds to the channel groove 231 and is configured as the first cooling channel 21.

[0056] Among them, the first punching sheet 23 and the second punching sheet 24 are stacked to construct the rotor 20, the flow channel groove 231 corresponds to the discharge port 32, the space inside the flow channel groove 231 is the space inside the second cooling flow channel 22, the first through hole 241 corresponds to the flow channel groove 231, and the space inside the first through hole 241 is the space inside the first cooling flow channel 21.

[0057] In the above scheme, by stacking the first punching sheet 23 and the second punching sheet 24 , and providing the flow channel groove 231 on the first punching sheet 23 and the first through hole 241 on the second punching sheet 24 , the overall structure is simple and the reliability is improved.

[0058] Specifically, the first punching sheet 23 and the second punching sheet 24 are overlapped and welded, or the first punching sheet 23 and the second punching sheet 24 are riveted into a whole.

[0059] Reference Figure 3 , Figure 4 and Figure 5 In some embodiments, the rotor 20 includes: a first punching group and a second punching group. The first punching group is formed by stacking a plurality of first punchings 23, and the first punchings 23 are provided with a flow channel groove 231. When the plurality of first punchings 23 are stacked, the flow channel grooves 231 arranged on the first punchings 23 are also interconnected, and the mutually interconnected flow channel grooves 231 are configured as the second cooling flow channel 22. The width of the second cooling flow channel 22 is greater than the diameter of the discharge port 32, so that the cooling medium can fully enter the second cooling flow channel 22. The second punching group is formed by stacking a plurality of second punchings 24, and the second punching group is stacked on the first punching group. The second punching 24 is provided with a first through hole 241, and the first through hole 241 corresponds to the flow channel groove 231. When the plurality of second punchings 24 are stacked, the first through holes 241 arranged on the second punchings 24 are interconnected to form the first cooling flow channel 21.

[0060] In the above scheme, the first punching sheet group and the second punching sheet group are stacked, and the flow channel groove 231 is set on the first punching sheet 23, and the first through hole 241 is set on the second punching sheet 24. The flow channel groove 231 and the first through hole 241 are correspondingly connected, so that the second cooling channel 22 formed by the flow channel groove 231 and the first cooling channel 21 formed by the first through hole 241 are connected to each other, thereby ensuring the connection of the cooling medium in the rotor and ensuring the cooling effect of the rotor. Specifically, the first punching sheet group and the second punching sheet group are stacked and welded, or the first punching sheet group and the second punching sheet group are riveted as a whole.

[0061] Reference Figure 3 , Figure 4 and Figure 5 In some embodiments, the second punching sheet group is at least two groups, and the at least two groups of second punching sheet groups are arranged on opposite sides of the first punching sheet group.

[0062] The second lamination group is placed on opposite sides of the first lamination group, and the second lamination group is stacked with the first lamination group, that is, the rotor 20 includes a structure of second lamination group-first lamination group-second lamination group, and the first cooling channel 21 extends to both sides.

[0063] In the above scheme, by arranging the second punching sheet group on the opposite sides of the first punching sheet group, a structure of the second punching sheet group-the first punching sheet group-the second punching sheet group is formed. The overall structure is simple, and the cooling medium flows to both sides of the first punching sheet group. The cooling effect on the second punching sheet groups on both sides is more balanced, and the overall cooling effect of the rotor 20 is more uniform.

[0064] Reference Fig.11 In some embodiments, a buffer space 34 is provided between the rotating shaft 30 and the rotor 20 , and there are multiple discharge ports 32 . The multiple discharge ports 32 are respectively connected to the buffer space 34 , and the buffer space 34 is respectively connected to the multiple second cooling channels 22 .

[0065] Reference Figure 3 , Figure 4 , Figure 5 and Figure 8 In some embodiments, the motor 100 further includes a guide bar 50, the first punching sheet 23 further includes a second through hole 232, the second punching sheet 24 further includes a third through hole 242, the third through hole 242 corresponds to the second through hole 232, and the guide bar 50 is passed through the second through hole 232 and the third through hole 242. In the direction away from the center of the rotor 20, the width of the second through hole 232 gradually increases.

[0066] The guide bar 50 is inserted into the second through hole 232 and the third through hole 242, with a portion of the guide bar 50 located in the third through hole 242 and another portion located in the second through hole 232. In the radial direction, the portion of the second through hole 232 that is farther from the center of the rotor 20 has a larger width, and the opening of the second through hole 232 is larger, thereby meeting the needs of the guide bar 50.

[0067] In the above solution, by providing the second through hole 232 and the third through hole 242 to accommodate the conductive bar 50 , the width of the second through hole 232 is gradually increased, and the cooperation between the conductive bar 50 and the second through hole 232 is more stable.

[0068] Reference Figure 3 , Figure 4 , Figure 5 and Figure 8 In other embodiments, the motor 100 further includes a guide bar 50, the first punching sheet 23 further includes a second through hole 232, the second punching sheet 24 further includes a third through hole 242, the third through hole 242 corresponds to the second through hole 232, and the guide bar 50 is passed through the second through hole 232 and the third through hole 242. In the direction away from the center of the rotor 20, the width of the third through hole 242 gradually increases.

[0069] The guide bar 50 is inserted into the second through hole 232 and the third through hole 242, with a portion of the guide bar 50 located in the third through hole 242 and another portion located in the second through hole 232. In the radial direction, the portion of the third through hole 242 that is farther from the center of the rotor 20 has a larger width, and the opening of the third through hole 242 is larger, thereby meeting the needs of the guide bar 50.

[0070] In the above solution, by providing the second through hole 232 and the third through hole 242 to accommodate the conductive bar 50 , the width of the third through hole 242 is gradually increased, and the cooperation between the conductive bar 50 and the third through hole 242 is more stable.

[0071] Reference Figure 3 , Figure 4 , Figure 5 and Figure 8 In some other embodiments, the motor 100 further includes a guide bar 50, the first punching sheet 23 further includes a second through hole 232, the second punching sheet 24 further includes a third through hole 242, the third through hole 242 corresponds to the second through hole 232, and the guide bar 50 is passed through the second through hole 232 and the third through hole 242. In the direction away from the center of the rotor 20, the widths of the second through hole 232 and the third through hole 242 gradually increase.

[0072] The guide bar 50 is inserted into the second through hole 232 and the third through hole 242, a part of the guide bar 50 is located in the third through hole 242, and the other part is located in the second through hole 232. In the radial direction, the width of the part of the second through hole 232 and the third through hole 242 that is farther from the center of the rotor 20 is larger, and the opening of the second through hole 232 and the third through hole 242 is larger, so as to meet the needs of the guide bar 50.

[0073] In the above solution, by providing the second through hole 232 and the third through hole 242 to accommodate the conductive bar 50 , the widths of the second through hole 232 and the third through hole 242 gradually increase, and the cooperation between the conductive bar 50 and the second through hole 232 and the third through hole 242 is more stable.

[0074] Reference Figure 3 , Figure 4 , Figure 5 In some specific embodiments, there are multiple flow channel grooves 231 , and the multiple flow channel grooves 231 are evenly spaced along the circumferential direction of the first punching sheet 23 .

[0075] Reference Figure 3 , Figure 4 , Figure 5 In some specific embodiments, there are a plurality of second through holes 232 , and the plurality of second through holes 232 are evenly spaced apart along the circumferential direction of the first punching sheet 23 .

[0076] Reference Figure 3, Figure 4 , Figure 5 In some specific embodiments, there are multiple first through holes 241 , and the multiple first through holes 241 are evenly spaced apart along the circumferential direction of the second punching sheet 24 .

[0077] Reference Figure 3 , Figure 4 , Figure 5 In some specific embodiments, there are a plurality of third through holes 242 , and the plurality of third through holes 242 are evenly spaced apart along the circumferential direction of the second punching sheet 24 .

[0078] Reference Figure 3 , Figure 4 , Figure 5 In some embodiments, there are at least two second through holes 232 , and the flow channel groove 231 is disposed between two adjacent second through holes 232 .

[0079] The second through holes 232 are respectively disposed on two opposite sides of the flow channel groove 231 , and the flow channel groove 231 is located between the two second through holes 232 .

[0080] In the above solution, by arranging the flow channel groove 231 between two adjacent second through holes 232 , the structure is more compact and the overall structure has better balance.

[0081] Reference Figure 3 , Figure 4 , Figure 5 In some embodiments, there are at least two third through holes 242 , and the first through hole 241 is disposed between two adjacent third through holes 242 .

[0082] The third through holes 242 are respectively disposed on two opposite sides of the first through hole 241 , and the first through hole 241 is located between the two third through holes 242 .

[0083] In the above solution, by arranging the first through hole 241 between two adjacent third through holes 242 , the structure is more compact and the overall structure has better balance.

[0084] Reference Figure 3 , Figure 4 , Figure 5 In some embodiments, there are at least two second through holes 232 , and the flow channel 231 is disposed between two adjacent second through holes 232 . Also, there are at least two third through holes 242 , and the first through hole 241 is disposed between two adjacent third through holes 242 .

[0085] The second through holes 232 are respectively disposed on opposite sides of the flow channel groove 231 , and the flow channel groove 231 is located between the two second through holes 232 . The third through holes 242 are respectively disposed on opposite sides of the first through hole 241 , and the first through hole 241 is located between the two third through holes 242 .

[0086] In the above solution, by arranging the flow channel groove 231 between two adjacent second through holes 232 and arranging the first through hole 241 between two adjacent third through holes 242, the structure is more compact and the overall structure has better balance.

[0087] Reference Figures 6 to 9 In some embodiments, the motor 100 further includes an end ring assembly 40, which is disposed at the end of the rotor 20. The stator 10 includes a stator core 11 and a stator winding 12, and the stator winding 12 is wound around the stator core 11. The rotor 20 corresponds to the stator core 11, and the end ring assembly 40 corresponds to the stator winding 12. The end ring assembly 40 is provided with a spray channel 41, which is connected to the first cooling channel 21, and the spray channel 41 faces the stator winding 12 to spray the cooling medium to the end of the stator winding 12.

[0088] The end ring assembly 40 is arranged at the end of the rotor 20 , and the injection channel 41 on the end ring assembly 40 faces the stator winding 12 . The cooling medium in the first cooling channel 21 flows toward the injection channel 41 , and then is injected toward the end of the stator winding 12 through the injection channel 41 .

[0089] In the above scheme, by providing the injection channel 41 on the end ring assembly 40, the cooling medium is sprayed toward the stator winding 12 on the stator 10 by utilizing the injection channel 41, thereby further increasing the cooling range of the cooling medium and improving the cooling effect.

[0090] Specifically, the end ring assembly 40 is located below the stator winding 11 .

[0091] Reference Figures 6 to 9 In some embodiments, there are multiple injection channels 41 , and the multiple injection channels 41 include a first injection channel 411 and a second injection channel 412 . The end ring assembly 40 includes: an end ring member 42 and a cover plate 43 .

[0092] The end ring 42 is provided at the end of the rotor 20, the first injection channel 411 is provided at the end ring 42, and an angle θ1 is provided between the extension direction of the first injection channel 411 and the central axis of the rotor 20. The cover plate 43 is provided at the end ring 42, the second injection channel 412 is provided at the cover plate 43, and an angle θ2 is provided between the extension direction of the second injection channel 412 and the central axis of the rotor 20, and θ2 is different from θ1.

[0093] The extension direction of the first injection channel 411 is the injection direction of the first injection channel 411 , and the extension direction of the second injection channel 412 is the injection direction of the second injection channel 412 . The injection directions of the first injection channel 411 and the second injection channel 412 are different, so the cooling medium is sprayed in different directions.

[0094] In the above scheme, by setting θ2 to be different from θ1, the injection direction of the first injection channel 411 is different from the injection direction of the second injection channel 412, so that the cooling medium can be sprayed to different parts of the end of the stator winding 12. The injection direction of the first injection channel 411 is opposite to the inner side of the end of the stator winding 12, and the injection direction of the second injection channel 412 corresponds to the outer side of the end of the stator winding 12, which increases the cooling range of the cooling medium and reduces the probability of cooling dead corners.

[0095] Specifically, the upper portion of the end ring 42 is configured as a dynamic balancing portion to achieve dynamic balancing of the rotor 20 .

[0096] Reference Figure 7 In some embodiments, the end ring 42 is integrally formed with the rotor 20, and a circulation space 421 is provided on the end ring 42, and the circulation space 421 is connected to the first cooling channel 21, and a first injection channel 411 is provided on the inner side of the end ring 42 facing the end of the stator winding 12, and the first injection channel 411 is connected to the circulation space 421, and a cover plate 43 is provided on a side of the circulation space 421 away from the rotor 20 to block the circulation space 421, and the second injection channel 412 is connected to the circulation space 421. The end ring 42 and the cover plate 43 are connected by stir friction welding.

[0097] Among them, the circulation space 421 is connected to the first cooling channel 21 on the side facing the rotor 20, and the first cooling channel 21 supplies cooling medium to the circulation space 421. A cover plate 43 is installed on the side of the circulation space 421 away from the rotor 20. The cover plate 43 is used to block the circulation space 421 to prevent leakage of the cooling medium. The circulation space 421 is respectively connected to the first injection channel 411 and the second injection channel 412, and the circulation space 421 supplies cooling medium to the first injection channel 411 and the second injection channel 412.

[0098] The end ring 42 is integrally formed with the rotor 20 , and during the manufacturing process, the flow space 421 is open, thereby facilitating production and manufacturing.

[0099] In the above scheme, by arranging the end ring 42 and the cover plate 43 to be connected by stir friction welding, the wall thickness of the end ring assembly 40 is effectively reduced, and the probability of defects such as cracks and holes in the end ring assembly 40 is reduced.

[0100] Among them, the end ring assembly 40 is divided into an end ring part 42 and a cover plate 43, so that the end ring can be cast with the rotor 20, and stir friction welding is used to connect the end ring part 42 and the cover plate 43. Stir friction welding (Friction Stir Welding, referred to as FSW) is a solid phase connection technology. A rotating tool is used to generate heat by friction at the joint of the workpiece to put the material in a plastic state, and then mechanical stirring is performed to achieve joining, thereby avoiding pores, cracks and deformation.

[0101] Specifically, the first punching sheet 23 and the second punching sheet 24 are connected as a whole, and then placed in a casting mold, and molten material is injected into the casting mold, and the guide vane and the end ring 42 are integrally formed on the rotor 20.

[0102] Specifically, the cover plate 43 is made of aluminum alloy and is constructed as an annular structure. The wall thickness of the annular structure is 12 mm, which is half of the difference between the outer diameter and the inner diameter. The thickness of the cover plate 43 is 3 mm.

[0103] Reference Figure 1 In some embodiments, the supply space 31 is provided with an oil inlet pipe 33 , which may also be connected to a transmission input shaft to supply cooling medium to the supply space 31 .

[0104] In some embodiments, the motor 100 is configured as an asynchronous motor.

[0105] A vehicle according to an embodiment of the present invention includes the motor 100 described above.

[0106] According to the vehicle of the embodiment of the utility model, by setting the first cooling channel 21 extending in the axial direction inside the rotor 20, the inside of the rotor 20 is better cooled, the cooling range is increased, the cooling effect is improved, and the continuous high current operation capability of the motor 100 is improved.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0108] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that: include: stator (10); A rotor (20), the rotor (20) being rotatably disposed in the stator (10), the rotor (20) being provided with a first cooling channel (21), the projection of the first cooling channel (21) in the axial direction of the rotor (20) extending along the axial direction; A rotating shaft (30), wherein the rotating shaft (30) is disposed in the rotor (20), and the rotating shaft (30) is provided with a supply space (31), wherein the supply space (31) has a discharge port (32), and the discharge port (32) is connected to the first cooling channel (21) to supply a cooling medium to the first cooling channel (21).

2. The motor according to claim 1, characterized in that The rotor (20) is also provided with a second cooling channel (22), the second cooling channel (22) extending in the radial direction of the rotor (20), the second cooling channel (22) respectively connecting the discharge port (32) and the first cooling channel (21) to supply the cooling medium to the first cooling channel (21).

3. The motor according to claim 2, characterized in that The rotor (20) comprises: A first punching sheet group, wherein the first punching sheet group is composed of a plurality of first punching sheets (23) stacked together, the first punching sheets (23) are provided with flow channel grooves (231), and the flow channel grooves (231) are configured as the second cooling flow channels (22); A second punching sheet group, wherein the second punching sheet group is composed of a plurality of second punching sheets (24) stacked together, the second punching sheet group is stacked on the first punching sheet group, a first through hole (241) is provided on the second punching sheet (24), the first through hole (241) corresponds to the flow channel groove (231), and the first through hole (241) is configured as the first cooling flow channel (21).

4. The motor according to claim 3, characterized in that The number of the second punching sheet groups is at least two, and the at least two second punching sheet groups are arranged on two opposite sides of the first punching sheet group.

5. The motor according to claim 3, characterized in that It also includes a guide bar (50), the first punching sheet (23) is further provided with a second through hole (232), the second punching sheet (24) is further provided with a third through hole (242), the third through hole (242) corresponds to the second through hole (232), and the guide bar (50) is passed through the second through hole (232) and the third through hole (242); wherein, In a direction away from the center of the rotor (20), the width of the second through hole (232) and / or the third through hole (242) gradually increases.

6. The motor according to claim 5, characterized in that There are at least two second through holes (232), and the flow channel groove (231) is arranged between two adjacent second through holes (232). There are at least two third through holes (242), and the first through hole (241) is arranged between two adjacent third through holes (242).

7. The electric machine according to any one of claims 1 to 6, characterized in that The invention also comprises an end ring assembly (40), wherein the end ring assembly (40) is arranged at an end of the rotor (20), the stator (10) comprises a stator core (11) and a stator winding (12), the stator winding (12) is wound around the stator core (11), the rotor (20) corresponds to the stator core (11), and the end ring assembly (40) corresponds to the stator winding (12); wherein: The end ring assembly (40) is provided with a spray channel (41), the spray channel (41) is connected to the first cooling channel (21), and the spray channel (41) is directed toward the stator winding (12) so as to spray the cooling medium toward the end of the stator winding (12).

8. The motor according to claim 7, characterized in that There are a plurality of injection channels (41), wherein the plurality of injection channels (41) include a first injection channel (411) and a second injection channel (412), and the end ring assembly (40) includes: An end ring (42), the end ring (42) being arranged at an end of the rotor (20), the first injection channel (411) being arranged at the end ring (42), and an angle θ1 being arranged between an extension direction of the first injection channel (411) and a central axis of the rotor (20); A cover plate (43), wherein the cover plate (43) is arranged on the end ring (42), the second injection channel (412) is arranged on the cover plate (43), and an angle θ2 is arranged between an extension direction of the second injection channel (412) and a central axis of the rotor (20), and θ2 is different from θ1.

9. The motor according to claim 8, characterized in that The end ring (42) is integrally formed with the rotor (20); a circulation space (421) is provided on the end ring (42); the circulation space (421) is connected to the first cooling channel (21); the first injection channel (411) is provided on a side of the end ring (42) facing the stator winding (12); the first injection channel (411) is connected to the circulation space (421); the cover plate (43) is provided on a side of the circulation space (421) away from the rotor (20) to block the circulation space (421); the second injection channel (412) is connected to the circulation space (421); wherein, The end ring (42) is connected to the cover plate (43) by friction stir welding.

10. A vehicle, characterized in that: The invention comprises the electric machine (100) according to any one of claims 1 to 9.

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