Motor, electric assembly and vehicle

Abstract

A vehicle, comprising an electric assembly or a motor. The electric assembly comprises a motor. The motor comprises a housing, a stator assembly, a rotor assembly, a first cooling pipeline and a second cooling pipeline. A cooling medium flowing through the first cooling pipeline is different from a cooling medium flowing through the second cooling pipeline, the first cooling pipeline is used for cooling the stator assembly, the second cooling pipeline is used for cooling the rotor assembly, and at least part of the second cooling pipeline is formed on the housing.

Description

Electric Motors, Electric Powertrains, and Vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on October 31, 2023, with application number 202322942518.4 and entitled “Motors, Electric Assemblies and Vehicles,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of vehicle technology, and in particular to an electric motor, an electric assembly, and a vehicle. Background Art

[0004] Motors in the related art typically use oil or water cooling to cool the stator and rotor assemblies. However, oil-cooled motors cannot ensure uniform oil flow to all parts, resulting in poor cooling uniformity. Water-cooled motors cannot cool the rotor, and the coolant cannot be sprayed to the main heat-generating areas of the stator or rotor assemblies, resulting in low heat dissipation efficiency.

[0005] Public content

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a motor that can cool the stator assembly and rotor assembly separately using different cooling media to improve the cooling efficiency of the stator assembly and the rotor assembly, thereby improving cooling uniformity and heat dissipation, and thus improving the output efficiency of the motor.

[0007] The present application also proposes an electric assembly having the above-mentioned motor.

[0008] The present application also proposes a vehicle having the above electric assembly.

[0009] In order to achieve the above-mentioned objectives, according to the first aspect embodiment of the present application, an electric motor is proposed, comprising: a housing; a stator assembly; a rotor assembly; a first cooling line; and a second cooling line, wherein the cooling media flowing through the first cooling line and the second cooling line are different, the first cooling line is used to cool the stator assembly, and the second cooling line is used to cool the rotor assembly, and at least a portion of the second cooling line is formed on the housing.

[0010] According to the first aspect of the present application, the motor can cool the stator assembly and the rotor assembly respectively through different cooling media to improve the cooling efficiency of the stator assembly and the rotor assembly, and the cooling uniformity and heat dissipation effect are better, which is conducive to improving the output efficiency of the motor.

[0011] According to some embodiments of the present application, the shell includes: a main shell; and an end cover, the main shell and the end cover form an accommodating cavity, the stator assembly and the rotor assembly are arranged in the accommodating cavity, and at least a portion of the second cooling pipeline is formed on the main shell and / or the end cover.

[0012] According to some embodiments of the present application, the rotor assembly includes: a rotor body; and a bearing, the rotor body is mounted on the main shell and the end cover through the bearing; wherein, the second cooling circuit includes a first cooling liquid channel formed on the main shell, a first spray hole is provided on the main shell, the first spray hole is connected to the first cooling liquid channel, and the first spray hole is used to spray coolant onto the bearing; and / or, a second spray hole is provided on the main shell, the second spray hole is connected to the first cooling liquid channel, and the second spray hole is used to spray coolant onto the rotor body.

[0013] According to some embodiments of the present application, the second cooling circuit also includes a second cooling liquid channel formed on the end cover, a third spray hole is provided on the end cover, the third spray hole is connected to the second cooling liquid channel, and the third spray hole is used to spray coolant onto the bearing; and / or, a fourth spray hole is provided on the end cover, the fourth spray hole is connected to the second cooling liquid channel, and the fourth spray hole is used to spray coolant onto the rotor body.

[0014] According to some embodiments of the present application, the rotor body includes: a rotating shaft; a first end ring; and a second end ring, the first end ring and the second end ring are respectively arranged at both ends of the rotating shaft, the second spray hole is used to spray coolant onto the first end ring, and the fourth spray hole is used to spray coolant onto the second end ring.

[0015] According to some embodiments of the present application, the rotating shaft is a hollow shaft.

[0016] According to some embodiments of the present application, the motor further includes a cooling jacket, the first cooling line is at least partially formed on the cooling jacket, and the cooling jacket is arranged on an outer peripheral side of the stator assembly.

[0017] According to some embodiments of the present application, a sealing ring is provided between the outer circumferential surface of the cooling jacket and the inner circumferential surface of the main shell.

[0018] According to some embodiments of the present application, the main housing includes: a ring portion, which surrounds the stator assembly, and the cooling jacket is located between the ring portion and the stator assembly; and an end portion, which is connected to one end of the ring portion and stops the stator assembly and the cooling jacket, the rotor assembly passes through the end portion, and the cooling jacket is connected to the end portion.

[0019] According to some embodiments of the present application, the motor further includes: a positioning pin, through which the cooling jacket and the end portion are positioned; and a fastener, which passes through the end portion and is connected to the cooling jacket.

[0020] According to some embodiments of the present application, the motor further includes: a radiator, which is arranged in the main housing; and a liquid inlet channel, which is arranged in the main housing, the inlet of the radiator is connected to the liquid inlet channel, and the outlet of the radiator is connected to the second cooling pipeline, and the radiator is used to exchange heat with the coolant flowing through the second cooling pipeline.

[0021] According to some embodiments of the present application, the liquid inlet channel includes: a first oil circuit, the lower end of the first oil circuit is provided with a rotor coolant inlet, and the first oil circuit gradually extends obliquely from bottom to top toward the interior of the main shell; a second oil circuit, the lower end of the second oil circuit is connected to the upper end of the first oil circuit, and the second oil circuit gradually extends obliquely from bottom to top toward the outside of the main shell; and a third oil circuit, the lower end of the third oil circuit is connected to the upper end of the second oil circuit, the upper end of the third oil circuit is connected to the radiator, and the third oil circuit gradually extends obliquely from bottom to top toward the interior of the main shell.

[0022] According to some embodiments of the present application, the first cooling liquid channel includes: a fourth oil circuit, which gradually extends from top to bottom in an inclined manner toward the outside of the main shell; and a fifth oil circuit, the upper end of the fifth oil circuit is connected to the lower end of the fourth oil circuit, and the fifth oil circuit gradually extends from top to bottom in an inclined manner toward the inside of the main shell.

[0023] According to a second aspect of the present application, an electric assembly is provided, comprising a reducer and the motor according to the first aspect of the present application, wherein the output shaft of the reducer is coaxially arranged with the rotating shaft of the motor.

[0024] According to the electric assembly of the second aspect embodiment of the present application, by utilizing the motor according to the first aspect embodiment of the present application, the stator assembly and the rotor assembly can be cooled separately through different cooling media to improve the cooling efficiency of the stator assembly and the rotor assembly, and the cooling uniformity and heat dissipation effect are better, which is conducive to improving the output efficiency of the motor.

[0025] According to a third aspect embodiment of the present application, a vehicle is proposed, comprising the motor according to the first aspect embodiment of the present application or the electric assembly according to the second aspect embodiment of the present application.

[0026] According to the vehicle of the third aspect embodiment of the present application, by utilizing the motor according to the first aspect embodiment of the present application or the electric assembly according to the second aspect embodiment of the present application, the stator assembly and the rotor assembly can be cooled respectively to improve the cooling efficiency of the stator assembly and the rotor assembly, so as to improve the cooling uniformity and heat dissipation effect, and help improve the output efficiency of the motor.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] FIG1 is a cross-sectional view of a motor according to an embodiment of the present application;

[0030] FIG2 is a schematic structural diagram of a housing of a motor according to an embodiment of the present application;

[0031] FIG3 is a structural schematic diagram of a housing of a motor according to an embodiment of the present application from another perspective;

[0032] FIG4 is a schematic structural diagram of an end cover of a motor according to an embodiment of the present application;

[0033] FIG5 is a cross-sectional view of a liquid cooling radiator of a motor according to an embodiment of the present application;

[0034] FIG6 is a schematic structural diagram of a cooling jacket of a motor according to an embodiment of the present application;

[0035] FIG7 is a schematic structural diagram of a cooling jacket of a motor according to an embodiment of the present application from another perspective;

[0036] FIG8 is a schematic structural diagram of a positioning pin and a fastener of a motor according to an embodiment of the present application;

[0037] FIG9 is a schematic block diagram of an electric powertrain according to an embodiment of the present application;

[0038] FIG10 is a schematic block diagram of a vehicle according to an embodiment of the present application;

[0039] FIG11 is another schematic block diagram of a vehicle according to an embodiment of the present application.

[0040] Reference numerals:

[0041] Vehicle 2000,

[0042] Electric assembly 1000,

[0043] Motor 1, reducer 2,

[0044] Housing 700, main housing 100, second cooling pipeline 110, liquid inlet channel 120, first oil channel 121, rotor coolant inlet 122, second oil channel 123, third oil channel 124, first coolant channel 130, fourth oil channel 131, fifth oil channel 133, second rotor coolant outlet 134, first spray hole 135, second spray hole 136, stator coolant inlet 140, stator coolant outlet 150, ring portion 160, return liquid channel 161, end portion 170, first channel 171, return liquid hole 173, second positioning pin hole 174, second fastener hole 175,

[0045] stator assembly 200,

[0046] Rotor assembly 300, rotor body 301, shaft 310, bearing 323, first bearing 320, second bearing 330, first end ring 340, second end ring 350,

[0047] Cooling jacket 400, first cooling pipe 410, first positioning pin hole 420, first fastener hole 430, sealing groove 440, sealing ring 450,

[0048] Radiator 500, heat dissipation cavity 510, cooling inlet 520, first cooling outlet 530, second cooling outlet 540, inlet 501, outlet 502,

[0049] End cover 600, second cooling liquid channel 610, third liquid spray hole 612, fourth liquid spray hole 613, liquid return groove 620, accommodating cavity 601,

[0050] Positioning pin 800 and fastener 900 . DETAILED DESCRIPTION

[0051] The following describes in detail embodiments of the present application, and the embodiments described with reference to the accompanying drawings are exemplary.

[0052] In the description of the present application, it should be understood 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0054] In the description of this application, “plurality” means two or more.

[0055] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0056] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0057] The motor 1 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0058] As shown in FIG. 1 to FIG. 7 , the motor 1 according to the embodiment of the present application includes a housing 700 , a stator assembly 200 , a rotor assembly 300 , a first cooling line 410 , and a second cooling line 110 .

[0059] The first cooling line 410 and the second cooling line 110 flow through different cooling media. The first cooling line 410 is used to cool the stator assembly 200 , and the second cooling line 110 is used to cool the rotor assembly 300 . At least a portion of the second cooling line 110 is formed on the housing 700 .

[0060] For example, the cooling medium in the first cooling line 410 may be water or other liquids, and the coolant in the second cooling line 110 may be oil.

[0061] The cooling medium can flow continuously in the first cooling pipe 410, and the heat generated by the stator winding of the stator assembly 200 can be transferred to the cooling medium in the first cooling pipe 410, so that the heat of the stator assembly 200 can be taken away by the flow of the cooling medium in the first cooling pipe 410, thereby achieving cooling of the stator assembly 200 and helping to improve the uniformity of cooling the stator assembly 200, so as to ensure that multiple parts of the stator assembly 200 can be evenly cooled, which is beneficial to improving the cooling effect of the stator assembly 200.

[0062] In addition, the motor 1 can guide the cooling medium through the second cooling pipe 110, and the cooling medium can flow along the second cooling pipe 110 and then be sprayed onto the rotor assembly 300, directly cooling the main heating area of ​​the rotor assembly 300 through the cooling medium, which is beneficial to improving the heat dissipation efficiency of the rotor assembly 300 and achieving better cooling effect.

[0063] Thus, the motor 1 of the embodiment of the present application can spray a cooling medium, such as oil, onto the rotor assembly 300 through the second cooling line 110 to cool the main heating area of ​​the rotor assembly 300, thereby ensuring a cooling effect on the rotor assembly 300. At the same time, the cooling medium in the first cooling line 410 can be used to exchange heat with the stator assembly 200 to achieve water cooling of the stator assembly 200, thereby improving the uniformity of cooling the stator assembly 200, thereby meeting the requirements of sufficient cooling of the stator assembly 200 and the rotor assembly 300, taking into account both cooling uniformity and high heat dissipation efficiency, which not only reduces the risk of overheating of the motor 1, but also effectively reduces the heat loss of the motor 1, which is conducive to improving the output efficiency of the motor 1.

[0064] In this way, the motor 1 according to the embodiment of the present application can cool the stator assembly 200 and the rotor assembly 300 respectively through different cooling media, so as to improve the cooling efficiency of the stator assembly 200 and the rotor assembly 300, make the cooling uniformity and heat dissipation effect better, and help improve the output efficiency of the motor 1.

[0065] In some specific embodiments of the present application, as shown in Figures 1-4, the shell 700 includes a main shell 100 and an end cover 600, the main shell 100 and the end cover 600 form an accommodating cavity 601, the stator assembly 200 and the rotor assembly 300 are arranged in the accommodating cavity 601, and at least a portion of the second cooling pipeline 110 is formed on the main shell 100 and / or the end cover 600.

[0066] That is, a portion of the second cooling pipe 110 can be constructed on the main housing 100, and another portion of the second cooling pipe 110 can be constructed on the end cover 600; alternatively, the second cooling pipe 110 can be constructed only on the main housing 100; or further, the second cooling pipe 110 can be constructed only on the end cover 600. This arrangement allows the second cooling pipe 110 to be more evenly distributed on the housing 700, allowing the cooling medium to flow through the second cooling pipe 110 to multiple locations on the motor 1, thereby allowing the cooling medium to more effectively cool the rotor assembly 300, further improving the cooling efficiency of the rotor assembly 300.

[0067] In some specific embodiments of the present application, as shown in FIG. 1 , the rotor assembly 300 includes a rotor body 301 and a bearing 323 .

[0068] The rotor body 301 is mounted on the main housing 100 and the end cover 600 via bearings 323 .

[0069] In which, the second cooling pipeline 110 includes a first cooling liquid channel 130 formed on the main shell 100, and a first spray hole 135 is provided on the main shell 100, the first spray hole 135 is connected to the first cooling liquid channel 130, and the first spray hole 135 is used to spray coolant onto the bearing 323; and / or, a second spray hole 136 is provided on the main shell 100, the second spray hole 136 is connected to the first cooling liquid channel 130, and the second spray hole 136 is used to spray coolant onto the rotor body 301.

[0070] The first liquid spraying hole 135 may extend in a radial direction of the main housing 100 , and the second liquid spraying hole 136 may extend in an axial direction of the main housing 100 .

[0071] In this way, a portion of the cooling medium can flow from the first cooling liquid channel 130 to the first spray hole 135 and be sprayed onto the bearing 323 through the first spray hole 135 to cool the bearing 323, while another portion of the cooling medium can flow from the first cooling liquid channel 130 to the second spray hole 136 and be sprayed onto the rotor body 301 through the second spray hole 136 to cool the rotor body 301. In this way, the cooling medium can be sprayed onto multiple parts of the rotor assembly 300, further improving the cooling efficiency of the rotor assembly 300.

[0072] Furthermore, as shown in Figure 4, the second cooling pipeline 110 also includes a second cooling liquid channel 610 formed on the end cover 600, and a third spray hole 612 is provided on the end cover 600, and the third spray hole 612 is connected to the second cooling liquid channel 610, and the third spray hole 612 is used to spray coolant onto the bearing 323; and / or, a fourth spray hole 613 is provided on the end cover 600, and the fourth spray hole 613 is connected to the second cooling liquid channel 610, and the fourth spray hole 613 is used to spray coolant onto the rotor body 301.

[0073] The third liquid spray hole 612 may extend in a radial direction of the main housing 100 , and the fourth liquid spray hole 613 may extend in an axial direction of the main housing 100 .

[0074] In this way, a portion of the cooling medium can flow from the second cooling liquid channel 610 to the third spray hole 612 and be sprayed onto the bearing 323 through the third spray hole 612 to cool the bearing 323, while another portion of the cooling medium can flow from the second cooling liquid channel 610 to the fourth spray hole 613 and be sprayed onto the rotor body 301 through the fourth spray hole 613 to cool the rotor body 301. In this way, the cooling medium can be sprayed onto multiple parts of the rotor assembly 300, further improving the cooling efficiency of the rotor assembly 300.

[0075] For example, there can be multiple bearings 323. For example, the bearings 323 include a first bearing 320 and a second bearing 330. The two ends of the rotor body 301 are supported on the main shell 100 and the end cover 600 through the first bearing 320 and the second bearing 330 respectively. The first spray hole 135 is used to spray the cooling medium onto one of the first bearing 320 and the second bearing 330, and the third spray hole 612 is used to spray the cooling medium onto the other of the first bearing 320 and the second bearing 330. In this way, the first cooling liquid channel 130 and the second cooling liquid channel 610 can respectively control the cooling medium to cool the first bearing 320 and the second bearing 330, avoiding the cooling medium concentrating on one bearing, resulting in less cooling medium sprayed on the other bearing, so as to ensure that the heat dissipation effect of the first bearing 320 and the second bearing 330 is equivalent and the heat dissipation is more uniform.

[0076] In some specific embodiments of the present application, as shown in FIG. 1 , the rotor body 301 includes a rotating shaft 310 , a first end ring 340 , and a second end ring 350 .

[0077] The first end ring 340 and the second end ring 350 are respectively provided at both ends of the rotating shaft 310 . The second spray hole 136 is used to spray the cooling liquid onto the first end ring 340 , and the fourth spray hole 613 is used to spray the cooling liquid onto the second end ring 350 .

[0078] Specifically, a punching sheet assembly is connected to the rotating shaft 310, and the punching sheet assembly includes multiple punching sheets stacked along the axial direction of the rotating shaft 310. The punching sheet assembly is installed with a first end ring 340 and a second end ring 350 at both axial ends of the rotating shaft 310 for limiting and fixing the multiple punching sheets.

[0079] With this arrangement, the first cooling liquid channel 130 and the second cooling liquid channel 610 can respectively control the cooling medium to cool the first end ring 340 and the second end ring 350, avoiding the cooling medium being concentrated on one end ring, resulting in less cooling medium being sprayed on the other end ring, so as to ensure that the heat dissipation effect of the first end ring 340 and the second end ring 350 is equivalent and the heat dissipation is more uniform.

[0080] In some specific embodiments of the present application, as shown in FIG1 , the rotating shaft 310 is a hollow shaft. This allows for a cooling pipeline to be disposed within the rotating shaft 310 , allowing a cooling medium to flow within the rotating shaft 310 . This allows the cooling medium to directly exchange heat with the rotating shaft 310 to cool the rotor assembly 300 . Furthermore, the cooling medium can be ejected during the rotation of the rotating shaft 310 , distributing the cooling medium to multiple components of the rotor assembly 300 , such as the end rings and bearings, further improving the cooling efficiency of the rotor assembly 300 .

[0081] In some specific embodiments of the present application, as shown in FIG6 and FIG7 , the motor 1 further includes a cooling jacket 400 , the first cooling line 410 is at least partially formed on the cooling jacket 400 , and the cooling jacket 400 is disposed on the outer peripheral side of the stator assembly 200 .

[0082] By providing a cooling jacket 400, the cooling jacket 400 can be sleeved on the outer peripheral side of the stator assembly 200. The cooling jacket 400 can cool the stator assembly 200 through the cooling medium flowing in the first cooling pipe 410. Moreover, the cooling jacket 400 can fit tightly with the outer peripheral surface of the stator assembly 200. The stator assembly 200 can transfer heat to the cooling jacket 400 through the part that fits with the cooling jacket 400, which is beneficial to improving the uniformity of cooling the stator assembly 200, so as to ensure that multiple parts of the stator assembly 200 can be evenly cooled, further improving the cooling effect of the stator assembly 200.

[0083] For example, the first cooling pipe 410 spirals around the circumference of the cooling jacket 400 and extends along the axial direction of the cooling jacket 400. Thus, the first cooling pipe 410 can be distributed at multiple locations of the cooling jacket 400 along the axial direction of the cooling jacket 400, and the cooling medium in the first cooling pipe 410 can flow in a spiral manner. This can increase the length of the first cooling pipe 410, which is beneficial to increasing the heat exchange efficiency between the cooling medium and the stator assembly 200, so that the cooling jacket 400 has a higher heat dissipation efficiency for the stator assembly 200 and a better cooling effect.

[0084] In which, the main housing 100 can be provided with a stator coolant inlet 140 and a stator coolant outlet 150, and the stator coolant inlet 140 and the stator coolant outlet 150 are arranged at intervals along the axial direction of the stator assembly 200, the stator coolant inlet 140 is connected to one end of the first cooling pipeline 410, and the stator coolant outlet 150 is connected to the other end of the first cooling pipeline 410.

[0085] In this way, when the main housing 100 and the cooling jacket 400 are assembled and fixed, the stator coolant inlet 140 and the stator coolant outlet 150 are respectively connected to the two ends of the first cooling pipeline 410, and the stator coolant inlet 140 and the stator coolant outlet 150 can be connected to the inlet and outlet of the water pump respectively, thereby forming a circulating cooling medium flow path, so that the cooling medium can circulate in the first cooling pipeline 410 to effectively cool the stator assembly 200.

[0086] Furthermore, by arranging the stator coolant inlet 140 and the stator coolant outlet 150 in the axial direction of the stator assembly 200 at intervals, that is, arranging the stator coolant inlet 140 and the stator coolant outlet 150 in the axial direction of the cooling jacket 400 at intervals, the stator coolant inlet 140 and the stator coolant outlet 150 can be placed at a greater distance, and the length of the first cooling line 410 can also be set longer, so that the first cooling line 410 can spiral around the circumference of the cooling jacket 400 and extend in the axial direction of the cooling jacket 400, thereby further improving the heat exchange efficiency of the cooling jacket 400 and the stator assembly 200.

[0087] In some specific embodiments of the present application, as shown in FIG1 , a sealing ring 450 is provided between the outer circumference of the cooling jacket 400 and the inner circumference of the shell 700 .

[0088] It is understandable that in the prior art, the cooling jacket and the main housing are sealed using an adhesive process. This adhesive structure is easily damaged during secondary repair, resulting in a greater risk of water leakage. In the embodiment of the present application, however, the main housing 100 and the cooling jacket 400 are sealed using a sealing ring 450. This ensures excellent sealing after secondary disassembly and assembly, preventing damage to the sealing structure between the main housing 100 and the cooling jacket 400 and improving the sealing effect.

[0089] Moreover, the cooling sleeve 400 in the present application is a separate component. When repairing the motor 1, the cooling sleeve 400 can be removed separately without the need for overall repair, which is beneficial to reducing repair and replacement costs and effectively reducing manpower and material costs.

[0090] Furthermore, there may be multiple sealing rings 450, which are disposed on both sides of the first cooling pipe 410 in the axial direction of the cooling jacket 400. That is, at least one sealing ring 450 is disposed on the cooling jacket 400 adjacent to one axial end thereof, and at least one sealing ring 450 is disposed on the cooling jacket 400 adjacent to the other axial end thereof. Thus, the multiple sealing rings 450 can respectively seal the axial ends of the cooling jacket 400 and the space between the main housing 100, preventing water seepage between the cooling jacket 400 and the main housing 100.

[0091] Of course, it is understandable that one end of the cooling jacket 400 can be provided with multiple sealing rings 450, and the other end of the cooling jacket 400 can also be provided with multiple sealing rings 450, so that multiple sealing rings 450 can simultaneously seal one end of the cooling jacket 400, and multiple sealing rings 450 can simultaneously seal the other end of the cooling jacket 400. Even if one of the multiple sealing rings 450 fails to seal, the remaining sealing rings 450 can also ensure the seal between the cooling jacket 400 and the main shell 100, effectively avoiding the failure of the seal between the main shell 100 and the cooling jacket 400.

[0092] The outer circumferential surface of the cooling jacket 400 may be provided with a plurality of sealing grooves 440, and a plurality of sealing rings 450 may be provided in the plurality of sealing grooves 440. In this way, the plurality of sealing rings 450 may be installed in a one-to-one correspondence within the plurality of sealing grooves 440. On the one hand, the sealing grooves 440 may be used to pre-position the sealing rings 450, which helps to simplify the assembly steps between the sealing rings 450 and the cooling jacket 400 and facilitates installation. On the other hand, the sealing grooves 440 may be used to fix the position of the sealing rings 450, which may prevent the sealing rings 450 from being offset, twisted, or deformed. This allows the sealing rings 450 to fit tightly against the cooling jacket 400 and the main housing 100, respectively, further improving the sealing effect of the sealing rings 450.

[0093] In some specific embodiments of the present application, as shown in FIG. 3 , the main housing 100 includes a ring portion 160 and an end portion 170 .

[0094] The ring portion 160 surrounds the stator assembly 200 , the cooling jacket 400 is located between the ring portion 160 and the stator assembly 200 , the end portion 170 is connected to one end of the ring portion 160 and stops the stator assembly 200 and the cooling jacket 400 , the rotor assembly 300 passes through the end portion 170 , and the cooling jacket 400 is connected to the end portion 170 .

[0095] In this way, the cooling jacket 400, the stator assembly 200 and the rotor assembly 300 can all be arranged in the main housing 100, and the ring portion 160 can radially position the cooling jacket 400, the stator assembly 200 and the rotor assembly 300, and the end portion 170 can axially position the cooling jacket 400, the stator assembly 200 and the rotor assembly 300 from one axial end of the main housing 100, so that the cooling jacket 400, the stator assembly 200 and the rotor assembly 300 can be fixed in the main housing 100.

[0096] Moreover, by connecting the cooling jacket 400 and the end portion 170, the relative position of the cooling jacket 400 and the main housing 100 can be fixed, the cooling jacket 400 and the main housing 100 will not rotate relative to each other, and the cooling jacket 400 is not easy to separate from the main housing 100. In addition, the relative position of the stator assembly 200 and the main housing 100 can be fixed to avoid relative displacement between the stator assembly 200 and the main housing 100.

[0097] Furthermore, it will be appreciated that the end portion 170 is connected to one end of the ring portion 160 and can stop the stator assembly 200. The rotor assembly 300 passes through the end portion 170, wherein the ring portion 160 is primarily used to create a space for mounting the rotor assembly 300 and the stator assembly 200. To prevent the motor 1 from being too large, the wall thickness of the ring portion 160 is typically thin, while the wall thickness of the end portion 170 can be thicker. This facilitates the construction of a portion of the second cooling duct 110 within the end portion 170, which not only facilitates processing and facilitates the flow of the cooling medium within the second cooling duct 110, but also prevents the structural strength of the end portion 170 from being too low.

[0098] In some specific embodiments of the present application, as shown in FIG. 2 , the end portion 170 is provided with a liquid return hole 173 . The liquid return hole 173 is located at the lower side of the end portion 170 and passes through the end portion 170 along the axial direction of the end portion 170 .

[0099] It is understood that after the motor 1 is assembled and fixed, the position of the main housing 100 is also relatively fixed. The location of the return hole 173 on the lower side of the end portion 170 means that after the motor 1 is assembled and fixed, the return hole 173 is located on the lower side of the end portion 170 in the vertical direction of the vehicle. In this way, the cooling medium sprayed onto the rotor assembly 300 by the first and second spray holes 135, 136 can naturally flow to the return hole 173 under the action of gravity and flow out of the main housing 100 through the return hole 173, thereby realizing the recycling of the cooling medium and preventing excessive accumulation of cooling medium in the main housing 100, so that the motor 1 can operate normally.

[0100] In addition, there can be one or more liquid return holes 173, and the multiple liquid return holes 173 can be arranged at intervals along the circumference of the end portion 170, so that the multiple liquid return holes 173 return liquid at the same time, and the liquid return speed is faster.

[0101] In some specific embodiments of the present application, as shown in Figures 1 and 4, a liquid return groove 620 is provided on the lower side of the end cover 600 facing the main shell 100, and the main shell 100 is provided with a liquid return channel 161, which extends along the axial direction of the rotor assembly 300 and is connected to the liquid return groove 620.

[0102] After the end cap 600 and the main housing 100 are assembled, the liquid return groove 620 of the end cap 600 communicates with the liquid return channel 161 of the main housing 100. A portion of the liquid return channel 161 extends axially along the ring portion 160 and penetrates the side of the ring portion 160 facing the end cap 600. Another portion of the liquid return channel 161 is located at the end portion 170 and penetrates the side of the end portion 170 facing away from the ring portion 160. In this way, the cooling medium flowing out of the third rotor coolant outlet 611 can naturally flow to the liquid return groove 620 under the action of gravity and flow out of the main housing 100 through the liquid return channel 161, thereby achieving the recycling of the cooling medium and preventing excessive accumulation of cooling medium in the main housing 100, thereby ensuring the normal operation of the motor 1.

[0103] In addition, it should be noted that the return liquid channel 161 and the return liquid hole 173 are not connected. The return liquid hole 173 can be arranged on the radial inner side of the return liquid channel 161, so that the cooling medium flowing out of the second rotor coolant outlet 134 and the cooling medium flowing out of the third rotor coolant outlet 611 can be diverted and refluxed through the return liquid hole 173 and the return liquid channel 161 respectively, so that the cooling medium can flow out of the main shell 100 more smoothly, further improving the return speed of the cooling medium.

[0104] In some specific embodiments of the present application, as shown in FIG. 3 and FIG. 7 , the motor 1 further includes a positioning pin 800 and a fastener 900 , as shown in FIG. 8 .

[0105] The cooling jacket 400 and the end portion 170 are positioned by a positioning pin 800 , and a fastener 900 passes through the end portion 170 and is connected to the cooling jacket 400 .

[0106] For example, the end of the cooling jacket 400 facing the end portion 170 may be provided with a first locating pin hole 420 and a first fastener hole 430, and the side of the end portion 170 facing the cooling jacket 400 may be provided with a second locating pin hole 174 and a second fastener hole 175. When assembling the cooling jacket 400 and the main housing 100, the locating pins 800 may be inserted into the first locating pin hole 420 and the second locating pin hole 174 to position the cooling jacket 400 and the end portion 170 of the main housing 100, and then the fasteners 900 may be inserted into the first fastener hole 430 and the second fastener hole 175 to connect and secure the cooling jacket 400 and the end portion 170 of the main housing 100.

[0107] Furthermore, as shown in Figures 3, 7, and 8, there are multiple positioning pins 800 disposed on opposite radial sides of the cooling jacket 400, and multiple fasteners 900 disposed on opposite radial sides of the cooling jacket 400. In this way, the multiple positioning pins 800 can simultaneously pre-position the cooling jacket 400 and the main housing 100, thereby improving the positioning accuracy between the cooling jacket 400 and the main housing 100 and preventing the cooling jacket 400 and the main housing 100 from rotating relative to each other, so as to facilitate connection of the cooling jacket 400 and the main housing 100 via the fasteners 900. The fasteners 900 can connect and secure the cooling jacket 400 and the main housing 100 on opposite radial sides, further improving the connection stability between the cooling jacket 400 and the main housing 100 and more effectively preventing the cooling jacket 400 and the main housing 100 from rotating relative to each other.

[0108] In some specific embodiments of the present application, as shown in FIG1 , a clearance fit is provided between the ring portion 160 and the cooling jacket 400. It is understood that a sealing ring 450 needs to be installed between the ring portion 160 of the main housing 100 and the cooling jacket 400. By providing a clearance fit between the ring portion 160 and the cooling jacket 400, a reserved space is provided for the installation of the sealing ring 450, facilitating assembly. Furthermore, the outer diameter of the cooling jacket 400 can be smaller than the inner diameter of the ring portion 160, making it easier for the cooling jacket 400 to be assembled into the ring portion 160. This helps to simplify the assembly steps of the cooling jacket 400 and the main housing 100, making assembly more convenient and quick.

[0109] In some specific embodiments of the present application, as shown in Figures 2 and 3, the motor 1 further includes a radiator 500 and a liquid inlet channel 120. The radiator 500 is an oil-cooled radiator.

[0110] As shown in Figure 5, the liquid inlet channel 120 is arranged in the main shell 100, and the radiator 500 is arranged in the main shell 100. The inlet 501 of the radiator 500 is connected to the liquid inlet channel 120, and the outlet 502 of the radiator 500 is connected to the second cooling pipeline 110. The radiator 500 is used to exchange heat with the coolant flowing through the second cooling pipeline 110.

[0111] That is, the liquid inlet channel 120 is in communication with the second cooling line 110 through the radiator 500 .

[0112] By arranging the radiator 500 in the main housing 100 , that is, integrating the radiator 500 and the main housing 100 together, it is beneficial to reduce the overall volume of the radiator 500 and the main housing 100 , thereby reducing the volume of the motor 1 .

[0113] For example, a cooling water channel may be provided inside the radiator 500, and the cooling water channel and the second cooling pipe 110 are not connected, that is, the cooling water channel and the second cooling pipe 110 are in different spaces, or the cooling water channel and the second cooling pipe 110 are located in different layers. The cooling water channel may be connected to a water pump to drive water to circulate in the cooling water channel through the water pump. When the cooling medium in the second cooling pipe 110 flows through the radiator 500, it can exchange heat with the water in the cooling water channel, thereby cooling the cooling medium.

[0114] For example, the cooling medium in the second cooling pipeline 110 is oil. When the oil passes through the radiator 500 , the temperature of the oil can be reduced, thereby improving the cooling effect of the oil on the rotor assembly 300 .

[0115] Thus, the cooling medium can enter the main shell 100 through the liquid inlet channel 120, and then the cooling medium dissipates heat through the radiator 500, and is then sprayed to the rotor assembly 300 through the first cooling liquid channel 130 of the second cooling pipeline 110. Then, the low-temperature cooling medium can be directly sprayed onto the outer surface of the rotor assembly 300 to directly dissipate heat to the rotor assembly 300, thereby achieving a better cooling effect on the rotor assembly 300.

[0116] In which, the radiator 500 can be arranged on the ring portion 160, and the end portion 170 is provided with a first channel 171 and a second channel passing through it axially, the liquid inlet channel 120 is connected to the radiator 500 through the first channel 171, and the first cooling liquid channel 130 is connected to the radiator 500 through the second channel.

[0117] Specifically, the radiator 500 can be installed on the outer peripheral surface of the ring portion 160, and one end of the radiator 500 is close to the end portion 170, so that it is convenient to connect the first channel 171 and one end of the radiator 500, and to connect the second channel and one end of the radiator 500. The cooling medium for cooling the rotor assembly 300 can flow through the liquid inlet channel 120, the first channel 171, the radiator 500, the second channel and the first cooling liquid channel 130 in sequence, and then flow to the rotor assembly 300.

[0118] In some specific embodiments of the present application, as shown in FIG. 2 , the liquid inlet channel 120 includes a first oil path 121 , a second oil path 123 , and a third oil path 124 .

[0119] A rotor coolant inlet 122 is provided at the lower end of the first oil circuit 121, and the first oil circuit 121 gradually extends obliquely toward the interior of the main housing 100 from bottom to top. The lower end of the second oil circuit 123 is connected to the upper end of the first oil circuit 121, and the second oil circuit 123 gradually extends obliquely toward the outside of the main housing 100 from bottom to top. The lower end of the third oil circuit 124 is connected to the upper end of the second oil circuit 123, and the upper end of the third oil circuit 124 is connected to the radiator 500, and the third oil circuit 124 gradually extends obliquely toward the interior of the main housing 100 from bottom to top.

[0120] A first process hole is provided on the outer peripheral surface of the end portion 170 , and the upper end of the second oil passage 123 and the lower end of the third oil passage 124 are respectively connected to the first process hole.

[0121] Among them, the lower end of the first oil circuit 121 is far away from the center of the end portion 170, and the upper end of the first oil circuit 121 is close to the center of the end portion 170, the lower end of the second oil circuit 123 is close to the center of the end portion 170, and the upper end of the second oil circuit 123 is far away from the center of the end portion 170, and the lower end of the third oil circuit 124 is far away from the center of the end portion 170, and the upper end of the third oil circuit 124 is close to the center of the end portion 170.

[0122] With this arrangement, the liquid inlet channel 120 can be divided into multiple oil circuits, the length of each oil circuit can be shorter, and the upper end of the second oil circuit 123 and the lower end of the third oil circuit 124 can be close to the outer peripheral surface of the end portion 170. This makes it convenient to process the second oil circuit 123 and the third oil circuit 124 in different directions through the first process hole, which is beneficial to simplifying the processing technology of processing the liquid inlet channel 120 in the end portion 170, making the processing more convenient.

[0123] In some specific embodiments of the present application, as shown in FIG. 2 , the first cooling liquid channel 130 includes a fourth oil channel 131 and a fifth oil channel 133 .

[0124] The fourth oil passage 131 extends gradually and obliquely from top to bottom toward the exterior of the main housing 100. The upper end of the fifth oil passage 133 is connected to the lower end of the fourth oil passage 131. The fifth oil passage 133 extends gradually and obliquely from top to bottom toward the interior of the main housing 100. The lower end of the fifth oil passage 133 is provided with a first spray hole 135 and a second spray hole 136. One of the fourth oil passage 131 and the fifth oil passage 133 is connected to the second passage. The first spray hole 135 and the second spray hole 136 are located below the second passage. The outer circumference of the end portion 170 is provided with a second process hole, and the lower end of the fourth oil passage 131 and the upper end of the fifth oil passage 133 are respectively connected to the second process hole.

[0125] The upper end of the fourth oil passage 131 is close to the center of the end portion 170, and the lower end of the fourth oil passage 131 is away from the center of the end portion 170. The upper end of the fifth oil passage 133 is away from the center of the end portion 170, and the lower end of the fifth oil passage 133 is close to the center of the end portion 170. In this way, the first coolant channel 130 can be divided into multiple oil passages, each of which can be shorter, and the lower end of the fourth oil passage 131 and the upper end of the fifth oil passage 133 can be close to the outer circumferential surface of the end portion 170. This facilitates the machining of the fourth oil passage 131 and the fifth oil passage 133 in different directions through the second process hole, which helps to simplify the machining process of the first coolant passage 130 in the end portion 170, making the machining process more simple.

[0126] Specifically, the fourth oil circuit 131 can be connected to the second channel, and the cooling medium flowing out of the second channel can flow to the rotor assembly 300 through the fourth oil circuit 131, the fifth oil circuit 133, the first spray hole 135 and the second spray hole 136 to cool the rotor assembly 300.

[0127] The following describes an electric assembly 1000 according to an embodiment of the present application with reference to the accompanying drawings. As shown in Figure 9, the electric assembly 1000 includes a reducer 2 and a motor 1 according to the above-mentioned embodiment of the present application. The output shaft of the reducer 2 is coaxially arranged with the rotating shaft 310 of the motor 1.

[0128] According to the electric assembly 1000 of the embodiment of the present application, by utilizing the motor 1 according to the above-mentioned embodiment of the present application, different cooling media can be used to cool the stator assembly 200 and the rotor assembly 300 respectively, so as to improve the cooling efficiency of the stator assembly 200 and the rotor assembly 300, and the cooling uniformity and heat dissipation effect are better, which is conducive to improving the output efficiency of the motor 1.

[0129] The following describes a vehicle 2000 according to an embodiment of the present application with reference to the accompanying drawings. As shown in Figures 10 and 11, the vehicle 2000 includes the motor 1 according to the above embodiment of the present application or the electric assembly 1000 according to the above embodiment of the present application.

[0130] According to the vehicle 2000 of the embodiment of the present application, by utilizing the motor 1 according to the above-mentioned embodiment of the present application or the electric assembly 1000 according to the above-mentioned embodiment of the present application, the stator assembly 200 and the rotor assembly 300 can be cooled respectively to improve the cooling efficiency of the stator assembly 200 and the rotor assembly 300, so as to make the cooling uniformity and heat dissipation effect better, which is conducive to improving the output efficiency of the motor 1.

[0131] Other structures and operations of the motor 1 , the electric assembly 1000 , and the vehicle 2000 according to the embodiment of the present application are well known to those skilled in the art and will not be described in detail here.

[0132] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0133] Although the embodiments of the present application 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 intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A motor (1), characterized in that: include: Housing (700); stator assembly (200); A rotor assembly (300); A first cooling line (410); and A second cooling pipeline (110), wherein the cooling medium flowing through the first cooling pipeline (410) and the second cooling pipeline (110) is different, the first cooling pipeline (410) is used to cool a given subassembly (200), and the second cooling pipeline (110) is used to cool a rotor assembly (300), and at least a portion of the second cooling pipeline (110) is formed on the housing (700).

2. The electric machine (1) according to claim 1, characterized in that The housing (700) comprises: a main housing (100); and The main housing (100) and the end cover (600) form a receiving cavity (601), the stator assembly (200) and the rotor assembly (300) are arranged in the receiving cavity (601), and at least a portion of the second cooling pipeline (110) is formed on the main housing (100) and / or the end cover (600).

3. The electric machine (1) according to claim 2, characterized in that The rotor assembly (300) comprises: a rotor body (301); and A bearing (323), wherein the rotor body (301) is mounted on the main housing (100) and the end cover (600) via the bearing (323); Wherein, the second cooling pipeline (110) comprises a first cooling liquid channel (130) formed on the main housing (100), the main housing (100) is provided with a first liquid spray hole (135), the first liquid spray hole (135) is connected to the first cooling liquid channel (130), and the first liquid spray hole (135) is used to spray cooling liquid onto the bearing (323); and / or The main housing (100) is provided with a second liquid spray hole (136), the second liquid spray hole (136) is connected to the first cooling liquid channel (130), and the second liquid spray hole (136) is used to spray cooling liquid onto the rotor body (301).

4. The electric machine (1) according to claim 3, characterized in that The second cooling pipeline (110) further comprises a second cooling liquid channel (610) formed on the end cover (600), the end cover (600) being provided with a third liquid spray hole (612), the third liquid spray hole (612) being in communication with the second cooling liquid channel (610), the third liquid spray hole (612) being used to spray cooling liquid onto the bearing (323); and / or The end cover (600) is provided with a fourth liquid spray hole (613), the fourth liquid spray hole (613) is in communication with the second cooling liquid channel (610), and the fourth liquid spray hole (613) is used to spray cooling liquid onto the rotor body (301).

5. The electric machine (1) according to claim 4, characterized in that The rotor body (301) comprises: A rotating shaft (310); a first end ring (340); and The second end ring (350), the first end ring (340) and the second end ring (350) are respectively arranged at two ends of the rotating shaft (310), the second spray hole (136) is used to spray coolant onto the first end ring (340), and the fourth spray hole (613) is used to spray coolant onto the second end ring (350).

6. The electric machine (1) according to claim 5, characterized in that The rotating shaft (310) is a hollow shaft.

7. The electric machine (1) according to any one of claims 2 to 6, characterized in that: The motor (1) further comprises: A cooling jacket (400), wherein the first cooling pipeline (410) is at least partially formed on the cooling jacket (400), and the cooling jacket (400) is arranged on the outer peripheral side of the stator assembly (200).

8. The electric machine (1) according to claim 7, characterized in that A sealing ring (450) is provided between the outer circumferential surface of the cooling jacket (400) and the inner circumferential surface of the main housing (100).

9. The electric machine (1) according to claim 7 or 8, characterized in that The main housing (100) comprises: a ring portion (160), the ring portion (160) surrounding the stator assembly (200), the cooling jacket (400) being located between the ring portion (160) and the stator assembly (200); and An end portion (170), the end portion (170) is connected to one end of the ring portion (160) and stops the stator assembly (200) and the cooling jacket (400), the rotor assembly (300) passes through the end portion (170), and the cooling jacket (400) is connected to the end portion (170).

10. The electric machine (1) according to claim 9, characterized in that Also includes: A positioning pin (800), wherein the cooling jacket (400) and the end portion (170) are positioned by the positioning pin (800); and A fastener (900) passes through the end portion (170) and is connected to the cooling jacket (400).

11. The electric machine (1) according to any one of claims 2 to 10, characterized in that: Also includes: A radiator (500), wherein the radiator (500) is disposed on the main housing (100); and A liquid inlet channel (120), wherein the liquid inlet channel (120) is arranged on the main shell (100), the inlet (501) of the radiator (500) is connected to the liquid inlet channel (120), the outlet (502) of the radiator (500) is connected to the second cooling pipeline (110), and the radiator (500) is used to exchange heat with the coolant flowing through the second cooling pipeline (110).

12. The electric machine (1) according to claim 11, characterized in that The liquid inlet channel (120) comprises: A first oil circuit (121), wherein a rotor cooling liquid inlet (122) is provided at a lower end of the first oil circuit (121), and the first oil circuit (121) gradually extends obliquely from bottom to top toward the inside of the main housing (100); a second oil passage (123), the lower end of the second oil passage (123) being connected to the upper end of the first oil passage (121), the second oil passage (123) gradually extending obliquely from bottom to top toward the outside of the main housing (100); and A third oil circuit (124), wherein the lower end of the third oil circuit (124) is connected to the upper end of the second oil circuit (123), the upper end of the third oil circuit (124) is connected to the radiator (500), and the third oil circuit (124) gradually extends from bottom to top in an inclined manner toward the interior of the main housing (100).

13. The electric machine (1) according to any one of claims 3 to 6, characterized in that: The first cooling liquid channel (130) comprises: a fourth oil passage (131), the fourth oil passage (131) gradually extending obliquely from top to bottom toward the outside of the main housing (100); and A fifth oil circuit (133), the upper end of the fifth oil circuit (133) is connected to the lower end of the fourth oil circuit (131), and the fifth oil circuit (133) gradually extends obliquely from top to bottom toward the inside of the main housing (100).

14. An electric assembly (1000), characterized in that: It comprises a reducer (2) and a motor (1) according to any one of claims 1 to 13, wherein the output shaft of the reducer (2) is coaxially arranged with the rotating shaft (310) of the motor (1).

15. A vehicle (2000), characterized in that: The method comprises the electric machine (1) according to any one of claims 1 to 13 or the electric assembly (1000) according to claim 14.

Images