Guide device, motor, powertrain and vehicle

Abstract

The present application relates to a flow guide device, a motor, a powertrain and a vehicle, wherein the flow guide device includes a flow guide unit arranged at the end of a stator assembly; wherein the flow guide unit is formed with: a docking groove for docking to the stator assembly of the motor to form an infiltration space with the stator assembly of the motor; a flow guide channel for connecting the outside of the flow guide device with the infiltration space; wherein, in the radial direction of the motor, the first channel opening of the flow guide channel is arranged inside the second channel opening of the flow guide channel, so that the cooling medium flowing between the first channel opening of the flow guide channel and the stator oil groove of the motor passes through the end of the stator winding of the motor. The beneficial effect of the present application is to optimize the flow path of the cooling medium to effectively improve the heat dissipation of the winding end of the motor.

Description

Technical Field

[0001] The present application relates to the technical field of motor cooling, and in particular to a flow guide device, a motor, a power assembly and a vehicle. Background Art

[0002] In order to dissipate heat better, the motor usually adopts a flow guide device for the cooling medium (usually cooling oil) provided at both ends of the stator assembly.

[0003] Reference Figures 1A to 1C As shown, in the related art, the motor 100 generally includes a stator assembly 110 and a rotor assembly 120. The stator assembly 110 includes a stator core 111 and a plurality of stator windings 112; the stator core 111 has a plurality of stator teeth 111a; the stator windings 112 can be wound around the stator teeth 111a to form a corresponding magnetic field when powered on.

[0004] The rotor assembly 120 is disposed inside the stator assembly 110, and the rotor assembly 120 rotates around a central axis 101, that is, the rotor assembly 120 can be rotatably connected with the stator assembly 110 through a bearing (not shown in the figure) and the like; in order to prevent interference when the rotor assembly 120 and the stator assembly 110 are relative to each other, an air gap 102 is provided between the rotor assembly 120 and the stator assembly 110. The axial, radial, circumferential, etc. mentioned below are all based on the central axis 101.

[0005] Figures 1A to 1C The related technology shown uses concentrated winding, that is, one stator winding 112 is concentratedly wound around one stator tooth 111a. In some other related technologies, distributed winding can also be used, that is, one stator winding 112 can be wound around multiple stator teeth 111a. Regardless of whether it is concentrated winding or distributed winding, gaps will be formed between the stator windings 112, and the gaps can be used as channels for the cooling medium to flow from one side of the stator winding 112 to the other side in the axial direction. Generally speaking, these gaps are defined as inter-group channels 112a.

[0006] Refer to Figures 1A to 1C As shown, in the related art, in order to effectively cool the stator core 111, a plurality of channels extending axially and penetrating the stator core 111 are opened on the radial edge of the stator core 111. Generally, these channels are defined as stator oil grooves 111b.

[0007] Reference Figure 1DAs shown, in the related art, in order to effectively guide the cooling medium to the stator oil groove 111b and the component channel when the cooling medium enters the side of the stator assembly 110, and also prevent the cooling medium from entering the air gap 102, a guide device is provided on one side of the stator assembly 110, and the guide device is docked at the end of the stator assembly 110 to form a relatively closed infiltration space 131. The cooling medium entering the infiltration space 131 is as follows Figure 1D As shown, the oil flows into the stator oil groove 111b and the component channel respectively. The flow guide device 130 can be constructed to have an annular structure, so it is also called an oil collecting ring. Similarly, on the side where the coolant flows out to the stator component 110, the flow guide device 130 is responsible for guiding the coolant flowing out of the stator oil groove 111b and the component channel to the corresponding outlet.

[0008] Reference Figure 1D As shown, the flow path design of the flow guide device 130 in the related art often makes it impossible for the cooling medium to effectively dissipate the heat from the end of the stator winding 112 . Summary of the invention

[0009] The embodiments of the present application provide a flow guide device, a motor, a power assembly and a vehicle, which optimize the cooling medium flow path to at least partially solve the above-mentioned technical problems.

[0010] In order to achieve the above-mentioned object, according to a first aspect of the present application, a flow guiding device is provided for guiding a cooling medium of a motor, wherein the flow guiding device comprises a flow guiding unit arranged at an end of a stator assembly;

[0011] Wherein, the guide unit is formed by:

[0012] A docking groove, used for docking to the stator assembly of the motor to form an infiltration space with the stator assembly of the motor;

[0013] A flow guiding channel, used for connecting the outside of the flow guiding device with the infiltration space;

[0014] Wherein, in the radial direction of the motor, the first channel opening of the guide channel is arranged on the inner side of the second channel opening of the guide channel, so that the cooling medium flowing between the first channel opening of the guide channel and the stator oil groove of the motor passes through the end of the stator winding of the motor.

[0015] Optionally, in some embodiments of the present application, the flow guide channel has:

[0016] The connecting section is used to enable the flow guide channel to extend from the outside to the inside of the stator winding of the motor in the radial direction of the motor.

[0017] Optionally, in some embodiments of the present application, the flow guide channel further comprises:

[0018] The avoidance section is used to make the guide channel avoid the stator winding of the motor in the axial direction of the motor.

[0019] Optionally, in some embodiments of the present application, the connecting section and the avoiding section extend at least in different directions so that the cooling medium in the guide channel changes its flow direction when flowing through the connecting section and the avoiding section.

[0020] Optionally, in some embodiments of the present application, the avoidance section is arranged between the second channel opening of the guide channel and the connecting section.

[0021] Optionally, in some embodiments of the present application, the flow guide channel further comprises:

[0022] The flow equalizing section is used to connect the flow guide channel in the circumferential direction of the motor.

[0023] Optionally, in some embodiments of the present application, the flow equalizing section is arranged between the second channel opening of the flow guiding channel and the avoidance section.

[0024] Optionally, in some embodiments of the present application, the guide unit includes: a surface cover body and a lining cover body;

[0025] Wherein, the guide channel is formed between the surface cover body and the lining cover body.

[0026] Optionally, in some embodiments of the present application, the flow guiding unit includes:

[0027] An external connector, arranged at the second channel opening of the flow guiding channel;

[0028] Wherein, the external connector is arranged between the surface cover and the lining cover.

[0029] Optionally, in some embodiments of the present application, the flow guiding unit includes:

[0030] An inner connector, arranged between the second channel opening and the first channel opening of the flow guiding channel;

[0031] Wherein, the inner connector is arranged between the surface cover and the lining cover.

[0032] Optionally, in some embodiments of the present application, the surface cover constitutes a groove wall of the docking groove.

[0033] Optionally, in some embodiments of the present application, the lining cover constitutes the groove wall and groove bottom of the docking groove.

[0034] Optionally, in some embodiments of the present application, the surface cover and the lining cover are both constructed to have an annular structure.

[0035] Optionally, in some embodiments of the present application, the flow guide unit is further formed with:

[0036] The cooling spray hole is used to spray the cooling medium in the guide unit toward the area where the bearing of the motor is located.

[0037] Optionally, in some embodiments of the present application, the cooling nozzle is connected to the guide channel.

[0038] Optionally, in some embodiments of the present application, the flow guiding unit includes:

[0039] An end stopper is arranged in the docking groove and stops between the ends of the two stator windings of the motor.

[0040] Optionally, in some embodiments of the present application, the end stop is constructed to have a wedge-shaped structure.

[0041] Optionally, in some embodiments of the present application, the flow guiding device further includes:

[0042] A plurality of anti-leakage baffles are used to prevent the cooling medium from leaking from between the teeth of the two stator assemblies of the motor.

[0043] Optionally, in some embodiments of the present application, two ends of the anti-leakage baffle are respectively connected to the two guide units.

[0044] Optionally, in some embodiments of the present application, the anti-leakage baffle is fixedly connected to the two guide units as a whole.

[0045] According to a second aspect of the present application, a motor is provided, comprising the above-mentioned flow guiding device.

[0046] According to a third aspect of the present application, a power assembly is provided, comprising the above-mentioned flow guide device or motor.

[0047] According to a fourth aspect of the present application, a vehicle is provided, comprising the above-mentioned flow guiding device or power assembly.

[0048] The beneficial effects of the present application are: providing a flow guide device, a motor, a power assembly and a vehicle that effectively improve the heat dissipation of the winding ends of the motor by optimizing the flow path of the cooling medium.

[0049] More specifically, some embodiments of the present application may produce the following specific beneficial effects:

[0050] By setting the positions of the inlet and the outlet of the guide channel, the cooling medium can always pass through the end of the stator winding, thereby enhancing the heat dissipation of the winding.

[0051] By setting the shape of the guide channel, the winding avoidance is achieved while reducing the space occupied by the guide device.

[0052] The bearings of the motor can be effectively cooled through the cooling spray holes.

[0053] The circulation is achieved through structures such as an external support body and an internal support body while ensuring the structural strength.

[0054] The structural adaptation of the winding and the stator is achieved through end blocks and anti-leakage bars, avoiding problems such as uneven distribution or leakage of the cooling medium.

[0055] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0057] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0058] Figure 1A It is a schematic diagram of the structure of a stator assembly and a rotor assembly in the related art;

[0059] Figure 1B yes Figure 1A A schematic cross-sectional view of the stator assembly and the rotor assembly shown;

[0060] Figure 1C yes Figure 1A An exploded schematic diagram of the stator assembly and the rotor assembly shown;

[0061] Figure 1D It is a structural schematic diagram of a flow guide device in the related art;

[0062] Figure 2 is a schematic structural diagram of a flow guiding device provided in an exemplary embodiment of the present application;

[0063] Figure 3 is a schematic structural diagram of another flow guiding device provided in an exemplary embodiment of the present application;

[0064] Figure 4A is a schematic structural diagram of a motor provided in an exemplary embodiment of the present application;

[0065] Figure 4B yes Figure 4A An exploded schematic diagram of the motor shown;

[0066] Figure 4C yes Figure 4A A schematic cross-sectional view of the motor shown;

[0067] Figure 4D yes Figure 4A A schematic diagram of a partial structure of a motor shown;

[0068] Figure 4E yes Figure 4A The schematic diagram of the structure of the flow guide device in the motor shown is longitudinally cut;

[0069] Figure 4F yes Figure 4A A schematic diagram of a partial structure of a flow guide device in a motor shown;

[0070] Figure 4G yes Figure 4A The schematic diagram of the structure of the flow guide device in the motor shown is cross-sectioned;

[0071] Figure 5A is a schematic structural diagram of another motor provided in an exemplary embodiment of the present application;

[0072] Figure 5B for Figure 5A The schematic diagram of the structure of the motor shown is observed from another perspective;

[0073] Figure 5C for Figure 5A The schematic diagram of the structure of the motor shown is longitudinally cut;

[0074] Fig. 6A This is a schematic structural diagram of another motor provided in an exemplary embodiment of the present application;

[0075] Figure 6B for Fig. 6A The schematic diagram of the structure of the motor shown is longitudinally cut;

[0076] Figure 7 It is a schematic structural diagram of a vehicle provided in an exemplary embodiment of the present application.

[0077] Description of reference numerals:

[0078] 100, motor; 101, central axis; 102, air gap; 110, stator assembly; 111, stator core; 111a, stator teeth; 111b, stator oil groove; 112, stator winding; 112a, intergroup channel; 120, rotor assembly; 130, flow guide device; 131, wetted space;

[0079] 200, motor; 211, stator core; 211a, intergroup channel; 211b, stator oil groove; 212, stator winding; 220, flow guide unit; 221, infiltration space; 222, flow guide channel; 222a, first channel opening; 222b, second channel opening;

[0080] 300, motor; 311, stator core; 311a, intergroup channel; 311b, stator oil groove; 312, stator winding; 320, guide unit; 321, infiltration space; 322, guide channel; 322a, first channel opening; 322b, second channel opening; 322c, connecting section; 322d, avoidance section; 322e, flow equalization section; 323, surface cover; 323a, turning section; 323b, inclined section; 324, lining cover;

[0081] 400, motor; 401, central axis; 410, stator assembly; 411, stator core; 412, stator winding; 420, rotor assembly; 430, flow guide device; 431, flow guide unit; 432, flow guide channel; 432a, first channel opening; 432b, second channel opening; 432c, connecting section; 432d, avoidance section; 432e, flow equalization section; 432f, cooling spray hole; 433, wetting space; 434, docking groove; 435, surface cover; 435a, turning section; 435b, inclined section; 436, lining cover; 436a, end stopper; 437, anti-leakage stopper strip; 438, external connector; 439, internal connector;

[0082] 500, motor; 530, flow guide device; 531, flow guide unit; 532, flow guide channel; 532a, first channel opening; 532b, second channel opening; 532f, cooling spray hole;

[0083] 600, motor; 630, flow guiding device; 631, flow guiding unit; 632, flow guiding channel; 632a, first channel opening; 632b, second channel opening. DETAILED DESCRIPTION

[0084] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0085] Reference Figure 2 As shown, the present application provides a flow guide device (not shown in the figure), which includes a flow guide unit 220 arranged at the end of the stator assembly; wherein the flow guide unit 220 is formed with a docking groove (not shown in the figure, overlapping with the wetting space 221) and a flow guide channel 222.

[0086] The docking groove is used to dock with the stator assembly of the motor 200 to form a wetting space 221 with the stator assembly of the motor 200; the guide channel 222 is used to connect the outside of the guide device with the wetting space 221;

[0087] In which, in the radial direction of the motor 200, the first channel opening 222a of the guide channel 222 is arranged on the inner side of the second channel opening 222b of the guide channel 222, so that the cooling medium flowing between the first channel opening 222a of the guide channel 222 and the stator oil groove 211b of the motor 200 passes through the end of the stator winding 212 of the motor 200.

[0088] It should be noted that the axial, radial, circumferential directions and the axial, radial, and circumferential directions of the motor 200 appearing in the present application are all relative to the central axis of the motor 200, that is, the rotation axis of the rotor assembly.

[0089] Reference Figure 2 As shown, taking the introduction of cooling medium as an example, the guide channel 222 can make the cooling medium flow radially inwards close to the central axis ( Figure 2 After reaching the position (not shown), it enters the infiltration space 221, passes through the end of the stator winding 212, and then enters the stator oil groove 211b and / or the component channel. Figure 1D As shown, Figure 2 The solution shown can increase the cooling effect on the winding end by means of the flow path design of the flow guide channel 222 .

[0090] Reference Figure 3 As shown, the present application provides another flow guide device (not shown in the figure). Similarly, the flow guide device includes a flow guide unit 320 arranged at the end of the stator assembly; wherein the flow guide unit 320 is formed with a docking groove and a flow guide channel 322.

[0091] The docking groove is used to dock with the stator assembly of the motor 300 to form a wetting space 321 with the stator assembly of the motor 300; the guide channel 322 is used to connect the outside of the guide device with the wetting space 321;

[0092] In which, in the radial direction of the motor 300, the first channel opening 322a of the guide channel 322 is arranged on the inner side of the second channel opening 322b of the guide channel 322, so that the cooling medium flowing between the first channel opening 322a of the guide channel 322 and the stator oil groove 311b of the motor 300 passes through the end of the stator winding 312 of the motor 300.

[0093] Reference Figure 3 As shown, Figure 2 The difference between the illustrated solution and the illustrated solution is that the flow guiding channel 322 is no longer a straight channel.

[0094] Specifically, the guide unit includes a surface cover 323 and an inner lining cover 324, and a guide channel 322 is formed between the surface cover 323 and the inner lining cover 324. Relatively speaking, the surface cover 323 forms the outer side of the guide unit in the axial direction; and the inner lining cover 324 is arranged between the surface cover 323 and the stator assembly. As a more specific solution, the surface cover 323 constitutes the groove wall of the docking groove; and the inner lining cover 324 constitutes the groove wall and groove bottom of the docking groove.

[0095] Comparison Figure 2 As shown, Figure 3 The shape of the wetting space 321 of the illustrated solution is more adapted to the shape of the end of the stator winding 312 , thereby reducing the cooling medium required to wet the end of the stator winding 312 .

[0096] Comparison Figure 2 In terms of Figure 3 The difference of the illustrated solution also lies in that the flow guide channel 322 has, from the outside to the inside in the radial direction: a flow equalizing section 322e, a avoiding section 322d and a connecting section 322c.

[0097] The current equalization is used to make the flow guide channel 322 connected in the circumferential direction of the motor 300. The avoidance section 322d is used to make the flow guide channel 322 avoid the stator winding 312 of the motor 300 in the axial direction of the motor 300. The connecting section 322c is used to make the flow guide channel extend from the outside of the stator winding 312 of the motor 300 to the inside in the radial direction of the motor 300.

[0098] More specifically, the connecting section 322c and the avoiding section extend at least in different directions so that the cooling medium in the flow guiding channel 322 changes its flow direction when flowing through the connecting section 322c and the avoiding section. The avoiding section is disposed between the second channel opening 322b of the flow guiding channel 322 and the connecting section 322c. The flow averaging section 322e is disposed between the second channel opening 322b of the flow guiding channel 322 and the avoiding section 322d.

[0099] Reference Figure 3 As shown, with respect to the introduction of cooling medium, such a scheme can be adopted to distribute the cooling medium along the circumference of the motor 300 in the flow equalizing section 322e; the avoidance section 322d is used to bypass the obstruction at the end of the stator winding 312, and the connecting section 322c transports the cooling medium to the radial inner side of the end of the stator winding 312.

[0100] Reference Figure 3 As shown, as an optional solution, the inner wall of the surface cover 323 at the first channel opening (the inner wall of the docking groove) forms a turning section 323a and an inclined section 323b that intersects the motor axial direction so as to change the flow direction of the cooling medium to cause it to flow back, that is, to form a flow from the inside to the outside in the radial direction.

[0101] Reference Figure 2 and Figure 3 As shown, as mentioned above, it can be understood that in some embodiments of the present application, the guide channel and the wetting space of the guide unit cause the flow path of the cooling medium to rotate and overlap.

[0102] Reference FIG. 4A to FIG. 4G As shown, the motor 400 includes a stator assembly 410, a rotor assembly 420 and a flow guide device 430. The specific structures of the stator assembly 410 and the rotor assembly can be referred to Figures 1A to 1D Similarly, the axial, radial and circumferential directions in the following description are based on the central axis 401 of the motor 400.

[0103] FIG. 4A to FIG. 4G The motor 400 shown is different from the above-mentioned solution in that the flow guide device 430 includes two flow guide units 431 and a plurality of anti-leakage baffles 437 connected therebetween. These anti-leakage baffles 437 are used to prevent the cooling medium from leaking from between the teeth of the two stator assemblies 410 of the motor 400. The plurality of anti-leakage baffles 437 are distributed at different circumferential positions, and they are mainly used to close the gaps between the stator teeth (not shown in the figure) to prevent the cooling medium in the assembly channel from entering the air gap from the gaps between the stator teeth. Specifically, the anti-leakage baffles 437 are fixedly connected to the two flow guide units 431 as a whole, and the anti-leakage baffles 437 can be formed into a whole with the flow guide units 431 by welding or the like. They can be connected after the stator assembly 410 is assembled.

[0104] FIG. 4A to FIG. 4G The motor 400 shown is different from the above scheme in that: the guide unit 431 is also formed with a plurality of cooling spray holes 432f. These cold spray holes are used to spray the cooling medium in the guide unit 431 to the area where the bearing of the motor 400 is located. As a specific scheme, the cooling spray hole 432f can be connected to the guide channel 432, and can also be connected to the infiltration space 433; as a more preferred scheme, the cooling spray hole 432f is provided with a turning section 435a of the surface cover 435, so that the pressure of the cooling medium sprayed from the cooling spray hole 432f can be increased to the maximum extent.

[0105] Ginseng FIG. 4A to FIG. 4G , and the above Figure 3 Similar to the figure, the flow guiding channel 432 has: a first channel opening 432a, a second channel opening 432b; and the flow guiding channel 432 also has a connecting section 432c, a avoiding section 432d and a flow balancing section 432e.

[0106] FIG. 4A to FIG. 4G In the scheme, a plurality of second channel openings 432b may be provided in the circumferential direction; that is, the scheme may introduce the cooling medium from a plurality of circumferential positions or may export the cooling medium from a plurality of circumferential positions.

[0107] FIG. 4A to FIG. 4G In the scheme, a plurality of first channel openings 432a may be provided in the circumferential direction; that is, the scheme may distribute or recover the cooling medium in a plurality of stator oil grooves (not shown in the figure) or component channels (not shown in the figure) corresponding to a plurality of circumferential positions.

[0108] Reference FIG. 4A to FIG. 4G As shown, the air guide unit 431 further includes: a plurality of external connectors 438 and a plurality of internal connectors 439. The function of the external connectors 438 and the internal connectors 439 is to make the surface cover 435 and the lining cover 436 form a whole.

[0109] That is, the external connector 438 is disposed between the surface cover 435 and the inner lining cover 436 ; the internal connector 439 is disposed between the surface cover 435 and the inner lining cover 436 .

[0110] Since both the surface cover 435 and the lining cover 436 can be constructed as an annular structure, multiple outer connectors 438 and multiple inner connectors 439 are provided at multiple circumferential positions, and in the radial direction, the outer connector 438 is farther away from the central axis 401 than the inner connector 439. As a more specific solution, the outer connector 438 can be provided with a flow balancing section 432e, and the inner connector 439 can be provided with a connecting section 432c.

[0111] Reference FIG. 4A to FIG. 4GAs shown, the surface cover 435 constitutes the groove wall of the docking groove 434; the lining cover 436 constitutes the groove wall and the groove bottom of the docking groove 434; the guide unit 431 includes an end stopper 436a. The end stopper 436a is arranged in the docking groove 434 and stops between the ends of the two stator windings 412 of the motor 400, and the end stopper 436a is constructed to have a wedge-shaped structure. The end stopper 436a can both guide the cooling medium and compensate for the excess space formed between the ends of the two stator windings 412, so that the thickness (axial dimension) of this part of the flow channel is relatively uniform.

[0112] Reference FIG. 5A to FIG. 5C As shown, the motor 500 and FIG. 4A to FIG. 4G The difference between the embodiments shown is that the second channel opening 532b of the flow guide channel 532 of the flow guide unit 531 is only arranged at certain positions in the circumferential direction, that is, a centralized way of introducing and exporting the cooling medium is adopted. In this solution, the cooling spray hole 532f is arranged in the circumferential direction at a position corresponding to the second channel opening 532b.

[0113] Reference FIG. 6A to FIG. 6B As shown, the motor 600 and FIG. 5A to FIG. 5C The difference between the solutions shown is that the second channel opening 632b of one of the two flow guide units 631 is opened in the radial direction, while the second channel opening 632b of the other one is opened in the axial direction, which can provide more expansibility of the external flow path.

[0114] Based on the foregoing description, a second aspect of the present application further provides a motor, comprising: a stator assembly, a rotor assembly and the above-mentioned flow guide device.

[0115] According to the third aspect of the present application, the present application also provides a powertrain including the above-mentioned motor or flow guide device.

[0116] According to the fourth aspect of the present application, referring to Figure 7 As shown, a vehicle 1 is provided, which includes the above-mentioned motor or powertrain. The vehicle 1 has the above-mentioned beneficial effects, which will not be described in detail in this application.

[0117] The vehicle 1 may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0118] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0119] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0120] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0121] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A flow guide device for guiding the cooling medium of a motor, characterized in that: The flow guiding device comprises a flow guiding unit arranged at the end of the stator assembly; Wherein, the guide unit is formed by: A docking groove, used for docking to the stator assembly of the motor to form an infiltration space with the stator assembly of the motor; A flow guiding channel, used for connecting the outside of the flow guiding device with the infiltration space; Wherein, in the radial direction of the motor, the first channel opening of the guide channel is arranged inside the second channel opening of the guide channel, so that the cooling medium flowing between the first channel opening of the guide channel and the stator oil groove of the motor passes through the end of the stator winding of the motor; The flow guiding channel has: A connecting section, used to enable the flow guide channel to extend from the outside of the stator winding of the motor to the inside in the radial direction of the motor; The avoidance section is used to make the guide channel avoid the stator winding of the motor in the axial direction of the motor.

2. The flow guiding device according to claim 1, characterized in that: in, The connecting section and the avoiding section extend at least in different directions so that the flow direction of the cooling medium in the flow guide channel changes when flowing through the connecting section and the avoiding section.

3. The flow guiding device according to claim 2, characterized in that: in, The avoidance section is arranged between the second channel opening of the guide channel and the connecting section.

4. The flow guiding device according to claim 2, characterized in that: in, The flow guide channel also has: The flow equalizing section is used to connect the flow guide channel in the circumferential direction of the motor.

5. The flow guiding device according to claim 4, characterized in that: in, The flow balancing section is arranged between the second channel opening of the flow guiding channel and the avoidance section.

6. The flow guiding device according to any one of claims 1 to 5, characterized in that: The guide unit comprises: a surface cover body and an inner lining cover body; Wherein, the guide channel is formed between the surface cover body and the lining cover body.

7. The flow guiding device according to claim 6, characterized in that: The flow guiding unit comprises: An external connector, arranged at the second channel opening of the flow guiding channel; Wherein, the external connector is arranged between the surface cover and the lining cover.

8. The flow guiding device according to claim 6, characterized in that: The flow guiding unit comprises: An inner connector, arranged between the second channel opening and the first channel opening of the flow guiding channel; Wherein, the inner connector is arranged between the surface cover and the lining cover.

9. The flow guiding device according to claim 6, characterized in that: in, The surface cover forms a groove wall of the docking groove.

10. The flow guiding device according to claim 6, characterized in that: in, The lining cover body forms the groove wall and groove bottom of the docking groove.

11. The flow guiding device according to claim 6, characterized in that: in, The surface cover body and the lining cover body are both constructed to have an annular structure.

12. The flow guiding device according to any one of claims 1 to 5, characterized in that: in, The flow guide unit is also formed with: The cooling spray hole is used to spray the cooling medium in the guide unit toward the area where the bearing of the motor is located.

13. The flow guiding device according to claim 12, characterized in that: in, The cooling spray hole is communicated with the guide channel.

14. The flow guiding device according to any one of claims 1 to 5, characterized in that: in, The flow guiding unit comprises: An end stopper is arranged in the docking groove and stops between the ends of the two stator windings of the motor.

15. The flow guiding device according to claim 14, characterized in that: in, The end stop is configured to have a wedge-shaped structure.

16. The flow guiding device according to any one of claims 1 to 5, characterized in that: The flow guiding device further comprises: A plurality of anti-leakage baffles are used to prevent the cooling medium from leaking from between the teeth of the two stator assemblies of the motor.

17. The flow guiding device according to claim 16, characterized in that: in, Two ends of the anti-leakage baffle are respectively connected to the two flow guide units.

18. The flow guiding device according to claim 17, characterized in that: in, The anti-leakage baffle strip is fixedly connected to the two flow guide units to form a whole.

19. A motor, characterized in that: The electric motor comprises a flow guiding device as claimed in any one of claims 1 to 18.

20. A powertrain, characterized in that: It comprises the flow guiding device according to any one of claims 1 to 18 or the motor according to claim 19.

21. A vehicle, characterized in that: Comprising the motor as claimed in claim 19 or the powertrain as claimed in claim 20.

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