Motor and electric drive assembly

Abstract

The utility model provides a motor and an electric drive assembly. The motor comprises a shell, a stator, a cover plate and a storage part. The storage part is used for containing a cooling medium. A containing cavity is defined by the shell, and the stator is contained in the containing cavity. The cover plate is installed on the shell to block the containing cavity, the cover plate is provided with a first channel, the shell is provided with a second channel, the first channel is communicated with the storage part and the second channel, and a cooling medium flowing out of the second channel cools the stator. According to the motor provided by the invention, the cover plate is provided with the first channel, the shell is provided with the second channel, the cooling medium enters the first channel and the second channel from the storage part and flows out of the second channel to cool the stator, a cooling pipeline for conveying the cooling medium does not need to be additionally arranged, the structure is simple, the assembly process is saved, and miniaturization of the motor is facilitated.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular to a motor and an electric drive assembly. Background Art

[0002] With the development of new energy vehicles, the demand for miniaturized powertrains is increasing, and high-power-density motors are increasingly being used in new energy vehicles. As motor power density increases, the demand for motor heat dissipation capabilities also increases. If the motor is not cooled promptly, the stator will age prematurely, significantly shortening its service life. If the motor rotor is not cooled promptly, the rotor temperature will continue to rise, eventually leading to demagnetization of the rotor magnets due to overheating.

[0003] Most mainstream electric drive products currently on the market use an oil-cooling system. This involves storing cooling oil outside the motor housing, which is then piped into the motor to dissipate heat from the stator and rotor. However, the motor vibrates during operation, damaging the oil-cooling pipes. Furthermore, these pipes encroach on internal motor space, hindering motor miniaturization. Utility Model Content

[0004] The purpose of this application is to provide a motor and electric drive assembly with a simple structure.

[0005] The present application provides a motor, comprising: a housing, a stator, a cover plate, and a storage portion; the storage portion is used to accommodate a cooling medium; the housing forms a accommodating cavity, and the stator is accommodated in the accommodating cavity; the cover plate is installed on the housing to seal the accommodating cavity, the cover plate is provided with a first channel, and the housing is provided with a second channel, the first channel connects the storage portion and the second channel, and the cooling medium flowing out of the second channel cools the stator.

[0006] Furthermore, the motor includes a winding and a first oil guide ring; the winding includes a first end portion located on one side of the stator, and the first oil guide ring surrounds the outside of the first end portion; an oil guide groove is formed between the first oil guide ring and the housing, and the oil guide groove is connected to the second channel. The first oil guide ring is provided with a first through hole for the cooling medium in the oil guide groove to pass through to cool the first end portion.

[0007] Furthermore, the motor includes a second oil guide ring; the winding includes a second end located on the other side of the stator; the motor is provided with a third channel, which is connected to the oil guide groove so that the cooling medium in the oil guide groove can flow in to cool the stator; the second oil guide ring is provided with a second through-hole, which is connected to the third channel so that the cooling medium can pass through to cool the second end.

[0008] Furthermore, the motor includes a motor shaft and a rotor, the motor shaft forms a fourth channel, the fourth channel is connected to the first channel, the rotor is provided with a first cooling channel, and the motor shaft is provided with a first through hole connecting the fourth channel and the first cooling channel, so that the cooling medium flowing into the fourth channel through the first channel flows into the first cooling channel to cool the rotor.

[0009] Furthermore, the rotor is also provided with a second cooling channel, and the motor shaft is provided with a second through hole connecting the fourth channel and the second cooling channel, so that the cooling medium flowing into the fourth channel through the first channel can flow into the second cooling channel to cool the rotor; the first through hole and the second through hole are located at opposite ends of the motor shaft, and the first direction from the first inlet to the first outlet of the first cooling channel is opposite to the second direction from the second inlet to the second outlet of the second cooling channel.

[0010] Furthermore, the motor shaft includes a first end and a second end opposite to the first end, and the motor also includes a bearing rotatably connected to the first end; the motor shaft is provided with a third through-hole connected to the fourth channel to allow the cooling medium flowing into the fourth channel through the first channel to flow out to cool the bearing.

[0011] Furthermore, the second end is rotationally connected to the input shaft of the reducer, and the motor shaft is provided with a fourth through-hole connected to the fourth channel, so that the cooling medium flowing into the fourth channel through the first channel can flow out to the connection between the second end and the input shaft.

[0012] Furthermore, the storage portion is located at one side of the motor and is provided with an upward opening to allow a portion of the cooling medium to flow back into the storage portion.

[0013] Furthermore, it also includes an oil pump and an oil cooler; the oil pump is used to drive the cooling medium to flow; the oil cooler forms a cooling cavity, the cooling cavity is connected to the storage part, and the cooling medium enters the cooling cavity and flows into the first channel after being cooled.

[0014] The present application also provides an electric drive assembly, including the above-mentioned motor.

[0015] The motor provided in the present application has a cover plate provided with a first channel and a shell provided with a second channel. The cooling medium enters the first channel and the second channel from the storage portion and flows out through the second channel to cool the stator. No additional cooling pipeline is required to transport the cooling medium. The structure is simple, the assembly process is saved, and it is conducive to the miniaturization of the motor.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0018] Figure 1 It is a cross-sectional view of the motor of the present application.

[0019] Figure 2 Schematic diagram of the motor of the present application, wherein only a portion of the motor is shown.

[0020] Figure 3 It is a schematic diagram of the housing of the motor of the present application.

[0021] Figure 4 This is another cross-sectional view of the motor of the present application.

[0022] Figure 5 yes Figure 4 An enlarged view of the dotted box A in the cross-sectional view is shown.

[0023] Figure 6 This is a schematic diagram of the first oil guide ring of the motor of the present application.

[0024] Figure 7 yes Figure 6 The cross-sectional view of the first oil guide ring is shown along line CC.

[0025] Figure 8 It is a schematic diagram of the stator of the motor of the present application.

[0026] Figure 9 yes Figure 8 An enlarged view of circle D of the stator is shown.

[0027] Figure 10 yes Figure 4 An enlarged view of the dotted box B in the cross-sectional view shown.

[0028] Figure 11 This is a side view of the first end plate of the motor of the present application.

[0029] Figure 12 This is a side view of the second end plate of the motor of the present application.

[0030] Figure 13 It is a side view of the rotor of the motor of the present application.

[0031] Figure 14 It is a schematic diagram of the oil pump of the motor of this application.

[0032] Figure 15 It is a schematic diagram of the oil cooler of the motor of the present application.

[0033] Figure 16 It is a schematic diagram of the oil filter of the motor of the present application.

[0034] Figure 17 It is a schematic diagram of the cover plate of the motor of the present application.

[0035] Figure 18 yes Figure 17 A cross-sectional view of the cover is shown.

[0036] Figure 19 yes Figure 17 Another cross-sectional view of the cover is shown.

[0037] Figure 20 It is a schematic diagram of the transmission tube of the motor of the present application.

[0038] Explanation of Reference Numerals: 1. housing; 101. accommodating chamber; 102. oil guide groove; 11. second channel; 12. oil return channel; 13. third channel; 14. interface; 15. mounting portion; 21. stator; 211. first oil groove; 22. winding; 221. first end portion; 222. second end portion; 23. first oil guide ring; 231. first through-hole; 24. second oil guide ring; 31. motor shaft; 3101. first end portion; 3102. second end portion; 311. fourth channel; 312. first through-hole; 313. second through-hole; 314. third through-hole; 315. fourth through-hole; 32. rotor; 321. first cooling channel; 322. second cooling channel; 33. first end plate; 331. Second oil groove; 332. Fifth through-hole; 34. Second end plate; 341. Third oil groove; 342. Sixth through-hole; 35. Bearing; 4. Cover plate; 401. First channel; 41. Third through-hole; 42. Fourth through-hole; 43. Fifth through-hole; 44. Oil injection chamber; 45. Oil injection port; 5. Storage unit; 6. Oil pump; 61. First oil inlet; 62. First oil outlet; 63. Transmission pipe; 631. Pipe inlet; 632. Pipe outlet; 633. Fixing unit; 7. Oil cooler; 71. Third oil inlet; 72. Third oil outlet; 73. Water inlet; 74. Water outlet; 8. Oil filter; 81. Second oil inlet; 82. Second oil outlet; 9. Reducer; 91. Input shaft. DETAILED DESCRIPTION

[0039] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0040] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.

[0041] Please refer to Figures 1 to 3 As shown, the present application provides a motor comprising: a housing 1, a stator 21, a cover plate 4, and a storage portion 5. The storage portion 5 is used to store a cooling medium. The housing 1 defines a housing cavity 101, and the stator 21 is received within the housing cavity 101. The cover plate 4 is mounted on the housing 1 to seal the housing cavity 101. The cover plate 4 is provided with a first channel 401, and the housing 1 is provided with a second channel 11. The first channel 401 connects the storage portion 5 and the second channel 11, and the cooling medium flowing out of the second channel 11 cools the stator 21.

[0042] In the motor provided in the present application, the cover plate 4 is provided with a first channel 401, and the housing 1 is provided with a second channel 11. The cooling medium enters the first channel 401 and the second channel 11 from the storage portion 5, and flows out in the second channel 11 to cool the stator 21. No additional cooling pipeline is required to transport the cooling medium. The structure is simple, the assembly process is saved, and it is conducive to the miniaturization of the motor.

[0043] The motor provided in the present application has a cover plate provided with a first channel and a shell provided with a second channel. The cooling medium enters the first channel and the second channel from the storage portion and flows out through the second channel to cool the stator. No additional cooling pipeline is required to transport the cooling medium, which can save costs and improve the miniaturization of the motor.

[0044] In some embodiments, the cooling medium may be cooling oil, and the cooling oil may be mineral oil, synthetic oil, silicone oil, ester oil, etc., which is not limited in this application.

[0045] In other embodiments, the cooling medium may also be a cooling liquid or a cooling gas, etc., which is not limited in this application.

[0046] The storage portion 5 of the present application is surrounded by a portion of the shell 1 and is located in the accommodating cavity 101 .

[0047] In other embodiments, the storage portion 5 can also be molded independently from the shell 1, made of materials such as plastic or metal that do not react with the cooling oil, and arranged in the accommodating cavity 101 or arranged on the shell 1 and located outside the accommodating cavity 101. This application does not impose any restrictions on this.

[0048] Please refer to Figure 1 、 Figure 4 and Figure 5 As shown, the motor of the present application includes a winding 22, a first oil guide ring 23, and a second oil guide ring 24. The winding 22 includes a first end 221 located on one side of the stator 21, a second end 222 located on the other side of the stator 21, and a main body (not shown) surrounded by the stator 21.

[0049] The first oil guide ring 23 surrounds the outer side of the first end portion 221. An oil guide groove 102 is formed between the first oil guide ring 23 and the housing 1. The oil guide groove 102 is connected to the second channel 11. The first oil guide ring 23 is provided with a first through-hole 231 for the cooling medium in the oil guide groove 102 to pass through and cool the first end portion 221.

[0050] Please refer to Figures 5 to 7 As shown, the first oil guide ring 23 is provided with a plurality of first through-holes 231 extending through the first oil guide ring 23 . The plurality of first through-holes 231 are evenly arranged along the circumference of the first oil guide ring 23 . The oil guide groove 102 formed between the first oil guide ring 23 and the housing 1 is annular in shape. Under the action of gravity, the cooling medium drips through the plurality of first through-holes 231 onto the first end portion 221 of the winding 22 , thereby cooling the first end portion 221 of the winding 22 .

[0051] The motor is provided with a third channel 13, which communicates with the oil guide groove 102, allowing the cooling medium in the oil guide groove 102 to flow into and cool the stator 21. The second oil guide ring 24 is provided with a second through-hole (not shown), which communicates with the third channel 13, allowing the cooling medium to pass through and cool the second end portion 222.

[0052] The third channel 13 described in this application is a channel formed between the stator 21 and the housing 1 for the cooling medium to pass through. Figures 8 and 9 As shown, a plurality of first oil grooves 211 are distributed on the stator 21 , and the plurality of first oil grooves 211 constitute the third channel 13 of the present application, which is used for the flow of cooling medium, can increase the contact area between the cooling medium and the stator 21 , thereby improving the cooling effect of the cooling medium on the stator 21 .

[0053] In other embodiments, the first oil groove 211 may not be provided on the stator 21, and the third channel 13 may be provided on the housing 1; in other embodiments, a portion of the third channel 13 is provided on the housing 1, and the other portion is provided on the stator 21, and this application does not impose any restrictions on this.

[0054] Please refer to Figure 1 and Figure 5As shown, in an embodiment of the present application, a cooling branch includes: the second channel 11 is connected to the oil guide groove 102, part of the cooling medium flows through the oil guide groove 102 through the second channel 11, and passes through the first through-hole 231 to cool the first end 221; part of the cooling medium enters the third channel 13 through the oil guide groove 102 to cool the stator 21; the cooling medium flowing out of the third channel 13 passes through the second through-hole to cool the second end 222.

[0055] In other embodiments, the oil guide groove 102 may not be provided, the second channel 11 is connected to the third channel 13, and a cooling branch includes: the cooling medium enters the third channel 13 through the second channel 11 to cool the stator 21; part of the cooling medium flowing along the third channel 13 flows in the direction of the first end 221, and then passes through the first through-hole 231 to cool the first end 221; part of the cooling medium flowing along the third channel 13 flows in the direction of the second end 222, and then passes through the second through-hole to cool the second end 222.

[0056] Please refer to Figure 4 and Figure 5 As shown, in the embodiment of the present application, the storage portion 5 is located on one side of the motor and has an upward opening to allow a portion of the cooling medium to flow back into the storage portion 5. Specifically, the storage portion 5 is located directly below the second end portion 222, and the opening of the storage portion 5 faces the second end portion 222. The cooling medium that passes through the second through-hole to cool the second end portion 222 eventually drips into the storage portion 5 under the action of gravity.

[0057] The housing 1 is provided with an oil return channel 12 , which is in communication with the storage portion 5 . The cooling medium passing through the first through-hole 231 to cool the first end portion 221 drops into the oil return channel 12 and flows toward the storage portion 5 .

[0058] The oil return channel 12 is tilted downward from the first end 221 toward the second end 222 , so that the cooling medium can flow to the storage portion 5 under the action of gravity without additional driving.

[0059] In other embodiments, the storage portion 5 can be arranged below the second end 222 and between the first end 221 and the second end 222, and the return oil channel 12 is arranged on both sides of the storage portion 5 and is connected to the storage portion 5. The cooling medium drips from the first end 221 and the second end 222 to the return oil channel 12 and flows to the storage portion 5. This application does not impose any restrictions on this.

[0060] Please refer to Figure 1 and Figures 10 to 13As shown, the motor includes a motor shaft 31 and a rotor 32. The motor shaft 31 forms a fourth channel 311, which is connected to the first channel 401, so that the cooling medium can flow through the first channel 401 to the fourth channel 311 to cool the motor shaft 31.

[0061] The rotor 32 is provided with a first cooling channel 321 . The motor shaft 31 is provided with a first through hole 312 connecting the fourth channel 311 and the first cooling channel 321 , so that the cooling medium flowing into the fourth channel 311 through the first channel 401 can flow into the first cooling channel 321 to cool the rotor 32 .

[0062] Rotor 32 includes a rotor core and magnets. The rotor core is formed by stacking six iron sheets. The rotor core and magnets of rotor 32 are cooled by a cooling medium, effectively controlling their temperature and preventing overheating and demagnetization of the magnets.

[0063] In other embodiments, the rotor core may also be formed by stacking more than six iron sheets or less than six iron sheets, and this application does not impose any limitation on this.

[0064] The motor includes a first end plate 33, which is arranged at one end of the motor shaft 31. The first end plate 33 is provided with a second oil groove 331, which connects the first through hole 312 and the first cooling channel 321. The cooling medium passes through the first through hole 312 into the second oil groove 331 and flows to the first cooling channel 321 through the second oil groove 331.

[0065] The rotor 32 is further provided with a second cooling channel 322 . The motor shaft 31 is provided with a second through hole 313 connecting the fourth channel 311 and the second cooling channel 322 , so that the cooling medium flowing into the fourth channel 311 through the first channel 401 can flow into the second cooling channel 322 to cool the rotor 32 .

[0066] The motor also includes a second end plate 34. The first through-hole 312 and the second through-hole 313 are located at opposite ends of the motor shaft 31. The second end plate 34 is located at the other end of the motor shaft 31 opposite the first end plate 33. A third oil groove 341 is provided on the second end plate 34. The third oil groove 341 connects the second through-hole 313 with the second cooling channel 322. The cooling medium passes through the second through-hole 313 into the third oil groove 341 and flows through the third oil groove 341 to the second cooling channel 322.

[0067] The first end plate 33 further defines a fifth through-hole 332 , and the second end plate 34 further defines a sixth through-hole 342 . The storage portion 5 is located below the second end plate 34 , with an opening on the storage portion 5 facing the second end plate 34 .

[0068] The fifth through hole 332 is used for the cooling medium in the second cooling channel 322 to pass through and drip into the oil return channel 12 and flow from the oil return channel 12 to the storage portion 5. The sixth through hole 342 is used for the cooling medium in the first cooling channel 321 to pass through and drip into the storage portion 5.

[0069] The first direction X1 from the first inlet to the first outlet of the first cooling channel 321 is opposite to the second direction X2 from the second inlet to the second outlet of the second cooling channel 322. The rotor 32 is provided with two cooling channels with opposite flow directions, thereby improving the cooling effect on the rotor 32.

[0070] The present application provides four first through holes 312 , which are evenly distributed along the circumferential direction of the motor shaft 31 . The present application also provides four second oil grooves 331 , which are connected to the first through holes 312 in a one-to-one correspondence.

[0071] There are four second through holes 313 , which are evenly distributed along the circumferential direction of the motor shaft 31 . There are four third oil grooves 341 , which are connected to the second through holes 313 in a one-to-one correspondence.

[0072] The rotor 32 is provided with eight cooling channels, including four first cooling channels 321 and four second cooling channels 322 . The four first cooling channels 321 are connected to the four second oil grooves 331 in a one-to-one correspondence, and the four second cooling channels 322 are connected to the four third oil grooves 341 in a one-to-one correspondence.

[0073] The present application does not limit the number of the first through hole 312, the second through hole 313, the first cooling channel 321, the second cooling channel 322, the second oil groove 331 and the third oil groove 341. In other embodiments, a different number of the first through hole 312, the second through hole 313, the first cooling channel 321, the second cooling channel 322, the second oil groove 331 and the third oil groove 341 from that of the present application may also be set, all of which are within the protection scope of the present application.

[0074] The motor shaft 31 includes a first end 3101 and a second end 3102 opposite the first end 3101. The motor also includes a bearing 35 rotatably connected to the first end 3101. The motor shaft 31 has a third through-hole 314 connected to the fourth channel 311. This allows the cooling medium that flows into the fourth channel 311 via the first channel 401 to flow out to cool the bearing 35. After cooling the bearing 35, the cooling medium flows into the oil return channel 12 and ultimately flows back to the reservoir 5 through the oil return channel 12.

[0075] The second end 3102 of the motor shaft 31 is rotationally connected to the input shaft 91 of the reducer 9. The motor shaft 31 is provided with a fourth through-hole 315 connected to the fourth channel 311, so that the cooling medium flowing into the fourth channel 311 through the first channel 401 can flow out to the connection between the second end 3102 and the input shaft 91, thereby cooling and lubricating the reducer 9; after cooling the reducer 9, it enters the channel in the housing 1 and finally returns to the storage portion 5.

[0076] The reducer 9 , the stator 21 , the rotor 32 and the like of the present application are all disposed in the accommodating cavity 101 surrounded by the housing 1 .

[0077] In other embodiments, the reducer 9 and the stator 21 , the rotor 32 , etc. may be respectively arranged in an accommodating cavity 101 surrounded by two independent shells 1 , and this application does not impose any limitation on this.

[0078] There are two third through-holes 314 , which are evenly distributed along the circumferential direction of the motor shaft 31 . There are four fourth through-holes 315 , which are evenly distributed on the motor shaft 31 .

[0079] In other embodiments, the number of the third through-holes 314 may be greater than two or less than two, and the number of the fourth through-holes 315 may be greater than four or less than four, which is not limited in the present application.

[0080] Please refer to Figures 1 to 3 and Figures 14 to 20 As shown, the motor provided in this application also includes an oil pump 6 and an oil cooler 7. The oil pump 6 is used to drive the flow of the cooling medium. The oil pump 6 is disposed on the housing 1 and is located outside the accommodating cavity 101. The oil pump 6 includes a first oil inlet 61 and a first oil outlet 62. The first oil inlet 61 is connected to the storage portion 5, and the first oil outlet 62 is connected to the first channel 401.

[0081] Driven by the oil pump 6 , the cooling medium enters the first oil inlet 61 from the storage portion 5 and flows out from the first oil outlet 62 to the first channel 401 , where it is divided into two paths to cool the stator 21 and the rotor 32 respectively.

[0082] The motor provided in the present application can adjust the flow rate of the cooling medium in real time according to the actual temperature of the motor by setting an independent oil pump 6, thereby achieving real-time control of the motor temperature and saving energy.

[0083] The motor provided herein also includes an oil filter 8, which is disposed between the reservoir 5 and the oil pump 6. The oil filter 8 includes a second oil inlet 81 and a second oil outlet 82. The second oil outlet 82 communicates with the first oil inlet 61 of the oil pump 6. The cooling medium within the reservoir 5 is first filtered through the oil filter 8, thereby preventing impurities in the cooling medium from damaging the stator 21 and rotor 32 during the cooling process.

[0084] The oil pump 6 provided herein also includes a transmission pipe 63. The housing 1 is provided with a port 14, a mounting portion 15, and a cooling medium passage (not shown). The transmission pipe 63 includes a pipe inlet 631, a pipe outlet 632, and a fixing portion 633. The pipe inlet 631 communicates with the first oil outlet 62 of the oil pump 6. The port 14 connects the pipe outlet 632 and the cooling medium passage, which in turn communicates with the oil cooler 7.

[0085] The fixing portion 633 is provided with a mounting hole, and the mounting portion 15 is provided with a through hole that matches the mounting hole of the fixing portion 633. The bolt passes through the mounting hole and the through hole, thereby fixing the fixing portion 633 and the mounting portion 15 to fix one end of the transmission tube 63 to the shell 1.

[0086] The cooling medium enters the transmission pipe 63 from the first oil outlet 62 of the oil pump 6 through the pipe inlet 631 , and enters the cooling medium channel from the pipe outlet 632 in the transmission pipe 63 and is transported to the oil cooler 7 .

[0087] The oil cooler 7 forms a cooling chamber that communicates with the storage portion 5. The oil cooler 7 is mounted on the housing 1 outside the accommodating chamber 101 and near the storage portion 5. The proximity of the oil cooler 7 and the oil pump 6 reduces the length of the path between them, thereby saving energy and improving efficiency. Furthermore, since both the oil cooler 7 and the oil pump 6 are located outside the accommodating chamber 101, the volume of the accommodating chamber 101 enclosed by the housing 1 can be designed to be smaller, thereby reducing the size of the motor and improving its miniaturization.

[0088] The oil cooler 7 includes a third oil inlet 71 and a third oil outlet 72. The third oil inlet 71 connects the cooling medium channel with the cooling chamber, while the third oil outlet 72 connects the cooling chamber with the first channel 401. The cooling medium stored in the storage unit 5 has a higher temperature due to cooling the motor. Before returning to the first channel 401, the cooling medium enters the cooling chamber for cooling and then flows into the first channel 401, thereby forming a cooling cycle for the motor.

[0089] The housing 1 is provided with a fifth channel (not shown), which connects the third oil outlet 72 and the first channel 401 . The cooled cooling medium enters the fifth channel of the housing 1 from the third oil outlet 72 and flows into the first channel 401 .

[0090] The cover plate 4 includes a third through-hole 41, a fourth through-hole 42, and a fifth through-hole 43. The third through-hole 41 connects the first channel 401 with the second channel 11. The fourth through-hole 42 connects the first channel 401 with the fourth channel 311. The fifth through-hole 43 connects the fifth channel with the first channel 401. The cooled cooling medium passes from the fifth channel through the fifth through-hole 43 into the first channel 401 and is divided into two branches within the first channel 401: one is the stator cooling path, in which the cooling medium passes through the third through-hole 41 into the second channel 11 and flows out from the second channel 11, thereby cooling the stator 21; the other is the rotor cooling path, in which the cooling medium passes through the fourth through-hole 42 into the fourth channel 311 and then enters the cooling channel within the rotor 32 from the fourth channel 311, thereby cooling the rotor 32.

[0091] The cover plate 4 defines an oil injection cavity 44 and an oil injection port 45. The oil injection port 45 faces the motor shaft 31. A fourth through hole 42 connects the oil injection cavity 44 with the first channel 401. Cooling medium in the first channel 401 passes through the fourth through hole 42 into the oil injection cavity 44, and is ejected from the oil injection port 45 into the fourth channel 311 formed by the motor shaft 31, thereby cooling the motor shaft 31.

[0092] The oil cooler 7 further includes a water inlet 83 and a water outlet 84 for supplying coolant into the cooling cavity of the oil cooler 7 to cool the cooling medium in the cooling cavity.

[0093] The motor of the present application is mounted on a vehicle, and the vehicle includes a thermal management system. The oil cooler 7 of the present application is connected to the thermal management system of the vehicle. The housing 1 is provided with a coolant channel (not shown) for the flow of coolant. The coolant in the thermal management system enters the cooling channel and enters the cooling cavity from the water inlet 83 in the oil cooler 7 to cool the cooling medium. The cooled coolant returns to the cooling channel from the water outlet 84 and returns to the thermal management system from the cooling channel.

[0094] The motor provided in the present application can realize closed circulation of the cooling medium through the oil pump 6 and the oil cooler 7, thereby improving the cooling efficiency of the cooling medium.

[0095] The present application also provides an electric drive assembly, including the above-mentioned motor.

[0096] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.

Claims

1. A motor, characterized in that: include: A shell, a stator, a cover plate and a storage portion; the storage portion is used to accommodate a cooling medium; the shell forms an accommodating cavity, and the stator is accommodated in the accommodating cavity; the cover plate is installed on the shell to block the accommodating cavity, the cover plate is provided with a first channel, and the shell is provided with a second channel, the first channel connects the storage portion and the second channel, and the cooling medium flowing out of the second channel cools the stator.

2. The motor according to claim 1, characterized in that The motor includes a winding and a first oil guide ring; the winding includes a first end portion located on one side of the stator, and the first oil guide ring surrounds the outside of the first end portion; an oil guide groove is formed between the first oil guide ring and the housing, and the oil guide groove is connected to the second channel. The first oil guide ring is provided with a first through-hole for the cooling medium in the oil guide groove to pass through to cool the first end portion.

3. The motor according to claim 2, characterized in that The motor includes a second oil guide ring; the winding includes a second end located on the other side of the stator; the motor is provided with a third channel, which is connected to the oil guide groove so that the cooling medium in the oil guide groove can flow in to cool the stator; the second oil guide ring is provided with a second through-hole, which is connected to the third channel so that the cooling medium can pass through to cool the second end.

4. The motor according to claim 1, characterized in that The motor includes a motor shaft and a rotor, the motor shaft encloses a fourth channel, the fourth channel is connected to the first channel, the rotor is provided with a first cooling channel, and the motor shaft is provided with a first through hole connecting the fourth channel and the first cooling channel, so that the cooling medium flowing into the fourth channel through the first channel flows into the first cooling channel to cool the rotor.

5. The motor according to claim 4, characterized in that The rotor is further provided with a second cooling channel, and the motor shaft is provided with a second through hole connecting the fourth channel and the second cooling channel, so that the cooling medium flowing into the fourth channel through the first channel can flow into the second cooling channel to cool the rotor; the first through hole and the second through hole are located at opposite ends of the motor shaft, and a first direction from the first inlet to the first outlet of the first cooling channel is opposite to a second direction from the second inlet to the second outlet of the second cooling channel.

6. The motor according to claim 4, characterized in that The motor shaft includes a first end and a second end opposite to the first end, and the motor also includes a bearing rotatably connected to the first end; the motor shaft is provided with a third through-hole connected to the fourth channel to allow the cooling medium flowing into the fourth channel through the first channel to flow out to cool the bearing.

7. The motor according to claim 6, characterized in that The second end is rotatably connected to the input shaft of the reducer, and the motor shaft is provided with a fourth through-hole connected to the fourth channel, so that the cooling medium flowing into the fourth channel through the first channel can flow out to the connection between the second end and the input shaft.

8. The motor according to claim 1, characterized in that The storage portion is located at one side of the motor and is provided with an upward opening for allowing a portion of the cooling medium to flow back into the storage portion.

9. The motor according to any one of claims 1 to 8, characterized in that It also includes an oil pump and an oil cooler; the oil pump is used to drive the cooling medium to flow; the oil cooler forms a cooling cavity, the cooling cavity is connected to the storage part, and the cooling medium enters the cooling cavity and flows into the first channel after being cooled.

10. An electric drive assembly, characterized in that: The method comprises the motor according to any one of claims 1 to 9.

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