Cooling structure, motor and vehicle

Abstract

The invention discloses a cooling structure, a motor and a vehicle, and solves the technical problem of poor cooling effect in the prior art. The cooling structure is applied to the stator comprising a tooth part and a yoke part sleeving the tooth part. The yoke part is provided with an oil guide groove and an oil inlet. The oil guide groove is located in the inner circumferential wall of the yoke part. The oil inlet penetrates through the side wall of the yoke part and communicates with the oil guide groove. At least one of the outer peripheral wall of the tooth part and the inner peripheral wall of the yoke part is provided with a cooling oil channel, and the length of the cooling oil channel is smaller than the axial length of the stator. One end of the cooling oil channel extends to the end face of the tooth part or the yoke part, and the cooling oil channel is communicated with the oil guide groove. According to the cooling structure disclosed by the invention, the cooling oil duct is arranged at the tooth part and / or the yoke part of the stator and is communicated with the oil guide groove, so that the interior of the stator is effectively cooled, the coolant can be directly sprayed to the end part of the winding, the temperature of the stator is remarkably reduced, and the operation efficiency and the stability of the motor are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of stator oil cooling, and specifically relates to a cooling structure, a motor and a vehicle. Background Art

[0002] The working principle of stator oil cooling technology is to inject special oil into the motor stator and use the oil system to cool and circulate the oil to achieve the purpose of stabilizing the operating temperature. During the operation of the motor, the temperature inside the stator will rise due to the generation of electric Joule heat, and the radiator inside the stator cannot completely dissipate the heat. At this time, by injecting special oil and using its heat conduction characteristics, the oil can be circulated inside the stator, distributing the heat evenly throughout the stator, thereby achieving the effect of lowering the temperature.

[0003] However, the existing cooling design can only allow the cooling oil to flow along the radial direction of the core for cooling, and the cooling effect is poor. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a cooling structure, a motor and a vehicle.

[0005] The technical solution adopted to achieve the purpose of the present application is that, in a first aspect of the present application, the present invention discloses a cooling structure applied to a stator including a tooth portion and a yoke portion sleeved outside the tooth portion;

[0006] The yoke is provided with an oil guide groove and an oil inlet, the oil guide groove is located on the inner peripheral wall of the yoke, and the oil inlet penetrates the side wall of the yoke and is communicated with the oil guide groove;

[0007] A cooling oil channel is provided on at least one of the outer circumferential wall of the tooth portion and the inner circumferential wall of the yoke portion, the length of the cooling oil channel is less than the axial length of the stator, one end of the cooling oil channel extends to the end surface of the tooth portion or the yoke portion, and the cooling oil channel is connected to the oil guide groove.

[0008] In some embodiments, the cooling oil channels are respectively provided at both ends of the tooth portion and / or the yoke portion, and the cooling oil channels located at both ends of the tooth portion and the yoke portion are respectively located at both sides of the oil guide groove.

[0009] In some embodiments, the cooling oil channels are respectively provided at both ends of the yoke;

[0010] A groove wall of the oil guide groove abuts against an outer peripheral wall of the tooth portion, and a projection of the groove wall of the oil guide groove along the axial direction of the stator is a closed circle.

[0011] In some embodiments, the oil guide groove is spiral-shaped.

[0012] In some embodiments, the cooling oil channels are respectively provided at both ends of the tooth portion;

[0013] The sum of the axial lengths of the cooling oil passages at both ends of the tooth portion is smaller than the axial length of the tooth portion; and / or

[0014] The cooling oil passages located at two ends of the tooth portion are staggeredly distributed along the circumference of the tooth portion.

[0015] In some embodiments, a plurality of cooling oil channels are provided, each of the cooling oil channels is distributed at intervals along the circumference of the tooth portion or the yoke portion, and an annular groove connected to the oil guide groove is provided on the outer circumferential wall of the tooth portion and / or the inner circumferential wall of the yoke portion, and the annular groove is connected between the oil guide groove and each of the cooling oil channels located on the same side.

[0016] In some embodiments, the cooling oil passages are disposed on both the outer circumferential wall of the tooth portion and the inner circumferential wall of the yoke portion, and the cooling oil passages on the tooth portion are disposed opposite to the cooling oil passages on the yoke portion.

[0017] In some embodiments, the cooling oil channel is provided with a protruding structure protruding toward the inner cavity.

[0018] The technical solution adopted to achieve the purpose of the present application is that, in the second aspect of the present application, the present invention further discloses a motor, which includes a stator, and the stator is equipped with the cooling structure described in the first aspect above.

[0019] The technical solution adopted to achieve the purpose of the present application is that, in the third aspect of the present application, the present invention also discloses a vehicle, which includes the motor described in the second aspect above.

[0020] It can be known from the above technical scheme that the cooling structure disclosed in the present application is applied to a stator including a tooth portion and a yoke portion sleeved outside the tooth portion. The yoke portion is provided with an oil guide groove and an oil inlet. The oil guide groove is located on the inner circumferential wall of the yoke portion, and the oil inlet passes through the side wall of the yoke portion and is connected to the oil guide groove. A cooling oil channel is provided on at least one of the outer circumferential wall of the tooth portion and the inner circumferential wall of the yoke portion, and the length of the cooling oil channel is less than the axial length of the stator. One end of the cooling oil channel extends to the end face of the tooth portion or the yoke portion, and the cooling oil channel is connected to the oil guide groove.

[0021] The cooling structure disclosed in the present application realizes effective cooling of the inside of the stator by setting cooling oil channels on the teeth and / or yoke of the stator and connecting them with the oil guide grooves, and can allow the coolant to be sprayed directly onto the ends of the windings, thereby significantly reducing the stator temperature and improving the operating efficiency and stability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] Figure 1 An exploded schematic diagram of a cooling structure in one or more embodiments of the present application;

[0024] Figure 2 A schematic top view of a cooling structure in one or more embodiments of the present application;

[0025] Figure 3 for Figure 2 A local enlarged schematic diagram at A in FIG.

[0026] Figure 4 for Figure 2 Schematic diagram of the middle tooth section;

[0027] Figure 5 for Figure 2 Schematic diagram of the middle yoke;

[0028] Figure 6 for Figure 1 Schematic cross-sectional view of the middle yoke.

[0029] Description of reference numerals:

[0030] 100 - tooth portion, 200 - yoke portion, 210 - oil inlet, 220 - oil guide groove, 230 - ring groove, 300 - cooling oil channel, 310 - protrusion structure. DETAILED DESCRIPTION

[0031] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described 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, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0032] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0034] The embodiment of the present invention discloses a cooling structure, which can solve the technical problem of poor cooling effect in the prior art, thereby effectively improving the heat dissipation efficiency of the motor stator, reducing the stator temperature, and further improving the overall performance and operating stability of the motor.

[0035] The technical solution of the present application is described in detail below through specific embodiments:

[0036] See also Figure 1 , Figure 2 and Figure 6 In the first aspect embodiment of the present application, a cooling structure is provided, which is applied to a stator including a tooth portion 100 and a yoke portion 200 sleeved outside the tooth portion 100. The yoke portion 200 is provided with an oil guide groove 220 and an oil inlet 210. The oil guide groove 220 is located on the inner circumferential wall of the yoke portion 200, and the oil inlet 210 passes through the side wall of the yoke portion 200 and is connected to the oil guide groove 220. A cooling oil channel 300 is provided on at least one of the outer circumferential wall of the tooth portion 100 and the inner circumferential wall of the yoke portion 200, and the length of the cooling oil channel 300 is less than the axial length of the stator. One end of the cooling oil channel 300 extends to the end face of the tooth portion 100 or the yoke portion 200, and the cooling oil channel 300 is connected to the oil guide groove 220.

[0037] The cooling structure disclosed in this embodiment realizes effective cooling of the inside of the stator by providing a cooling oil channel 300 on the teeth 100 and / or the yoke 200 of the stator and connecting it with the oil guide groove 220, and enables the coolant to be sprayed directly onto the winding ends, thereby significantly reducing the stator temperature and improving the operating efficiency and stability of the motor.

[0038] In this embodiment, the cooling oil passage 300 may be provided only on the tooth portion 100 , or only on the yoke portion 200 , or both on the tooth portion 100 and the yoke portion 200 .

[0039] Different coolants may be used according to different situations. In this embodiment, cooling oil may be used to cool the teeth 100 and yoke 200 of the stator and the windings. The cooling oil can flow directly in the teeth 100 and yoke 200.

[0040] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment, cooling oil passages 300 are respectively provided at both ends of the tooth portion 100 and / or the yoke portion 200, and the cooling oil passages 300 at both ends of the tooth portion 100 and the yoke portion 200 are respectively located on both sides of the oil guide groove 220. By providing cooling oil passages 300 at both ends, the coolant can have a faster circulation speed and a larger contact area with the stator, thereby improving the cooling effect.

[0041] In the stator structure, the tooth 100 is the core part of electromagnetic conversion, and its surface is prone to heat accumulation; while the yoke 200 plays the role of supporting and protecting the tooth 100, and also requires effective cooling to maintain the overall temperature stability. Therefore, in this embodiment, cooling oil channels 300 are respectively arranged at both ends of the tooth 100 or the yoke 200. These cooling oil channels 300 ensure that the coolant can fully contact and take away the heat from the stator surface through a specific layout.

[0042] The cooling oil passages 300 located at both ends of the tooth portion 100 and the yoke portion 200 are designed to be located on both sides of the oil guide groove 220. The advantage of this layout is that it can promote the uniform distribution of the coolant inside the stator. After the coolant enters the oil guide groove 220 through the oil inlet 210, it can flow to the cooling oil passages 300 of the tooth portion 100 and the yoke portion 200 at the same time, thereby achieving comprehensive cooling of the stator as a whole. In addition, this layout also helps to reduce the resistance and pressure loss of the coolant during the flow process, thereby improving the efficiency of the cooling system.

[0043] In specific implementation, the number and position of the cooling oil passages 300 can be adjusted according to the size, shape and expected heat dissipation requirements of the stator. For example, one or more cooling oil passages 300 can be provided at each end of the tooth portion 100 and the yoke portion 200 to ensure sufficient cooling capacity. At the same time, the shape and size of the cooling oil passages 300 can also be optimized to further improve the heat dissipation efficiency.

[0044] See also Figure 6 In one embodiment, cooling oil channels 300 are respectively provided at both ends of the yoke 200. The groove wall of the oil guide groove 220 abuts against the outer peripheral wall of the tooth portion 100, so that the coolant can only enter the cooling oil channel 300 along the oil guide groove 220, and then spray onto the windings at both ends along the cooling oil channel 300, thereby improving the cooling effect. The projection of the groove wall of the oil guide groove 220 along the axial direction of the stator is a closed circle. In this way, it can be ensured that no cooling oil channel 300 directly penetrates the stator along the axial direction of the stator, thereby avoiding affecting the magnetic flux of the stator.

[0045] The oil guide groove 220 is the main channel for the flow of coolant, and its design is crucial to the efficiency of the entire cooling system. In the present invention, the groove wall of the oil guide groove 220 is designed to be in close contact with the outer peripheral wall of the tooth portion 100. This design method not only helps to ensure that the coolant can fully contact the surface of the tooth portion 100, thereby effectively taking away the heat generated by the tooth portion 100, but also can enhance the heat transfer efficiency between the tooth portion 100 and the yoke 200.

[0046] In one embodiment, the oil guide groove 220 is spiral. The spiral oil guide groove 220 can guide the coolant to flow along a longer path, thereby increasing the contact time and contact area between the coolant and the surface of the stator (including the tooth portion 100 and the yoke portion 200). This helps to more effectively remove the heat generated by the stator surface and improve the cooling efficiency. The spiral design allows the coolant to be more evenly distributed inside the stator during the flow process, avoiding local overheating or insufficient cooling. At the same time, this design also helps to reduce the resistance and pressure loss of the coolant during the flow process, further improving the efficiency of the cooling system.

[0047] The spiral oil guide groove 220 can achieve a longer cooling path within the limited stator space, thereby improving the compactness of the cooling structure. This is of great significance for reducing the size of the motor and improving the power density. The spiral oil guide groove 220 can guide the coolant to form eddy currents or turbulence inside the stator, thereby enhancing the heat transfer effect. This flow state helps to more effectively transfer the heat inside the stator to the coolant and accelerate the heat dissipation.

[0048] Of course, setting the oil guide groove 220 in a spiral shape is only one implementation in this embodiment. In other implementations, setting the oil guide groove 220 in other shapes is also possible.

[0049] In one embodiment, one oil guide groove 220 is provided. One oil guide groove 220 is already able to guide the coolant well, but in other embodiments, multiple oil guide grooves 220 are provided, and then an annular connecting groove is designed to connect the oil guide grooves 220, and the annular connecting groove is connected to the oil inlet 210, so that the coolant can flow in multiple oil guide grooves 220 at the same time.

[0050] See also Figure 1 In one embodiment, cooling oil channels 300 are respectively provided at both ends of the tooth portion 100. The sum of the axial lengths of the cooling oil channels 300 at both ends of the tooth portion 100 is less than the axial length of the tooth portion 100; and / or the cooling oil channels 300 at both ends of the tooth portion 100 are staggered along the circumference of the tooth portion 100.

[0051] In this embodiment, there may be a variety of implementations to ensure that the cooling oil channel 300 on the tooth portion 100 does not penetrate the tooth portion 100 along the axial direction of the tooth portion 100 .

[0052] The first arrangement: the sum of the axial lengths of the cooling oil passages 300 located at both ends of the tooth portion 100 is smaller than the axial length of the tooth portion 100, and the cooling oil passages 300 located at both ends of the tooth portion 100 are arranged opposite to each other;

[0053] The second arrangement mode: the sum of the axial lengths of the cooling oil passages 300 located at both ends of the tooth portion 100 is smaller than the axial length of the tooth portion 100 , and the cooling oil passages 300 located at both ends of the tooth portion 100 are staggered;

[0054] The third arrangement: the sum of the axial lengths of the cooling oil passages 300 located at both ends of the tooth portion 100 is greater than or equal to the axial length of the tooth portion 100 , and the cooling oil passages 300 located at both ends of the tooth portion 100 are staggered.

[0055] In order to allow the coolant to be sprayed directly onto the windings, the existing stator is directly provided with a cooling oil channel that penetrates the stator along the axial direction of the stator. Such a cooling oil channel will affect the magnetic flux of the stator, thereby affecting the working performance of the motor.

[0056] The cooling structure disclosed in this embodiment ensures that the coolant can be sprayed onto the windings at both ends while avoiding the cooling oil channel 300 directly penetrating the yoke 200 along the axial direction of the yoke 200 through the above-mentioned arrangement method. The cooling oil channels 300 located at both ends of the yoke 200 are also separated by the groove wall of the oil guide groove 220, thereby avoiding affecting the magnetic flux of the stator.

[0057] In one embodiment, the oil inlet 210 is disposed at the middle position of the yoke 200 in the axial direction, so as to ensure that the coolant flows from the oil inlet 210 to the oil guide groove 220 at equal distances to the two ends of the yoke 200. In addition, the diameter of the oil inlet 210 can be made larger than the width of the oil guide groove 220, so as to ensure that sufficient coolant can flow in the oil guide groove 220 in different directions after entering the oil guide groove 220, thereby ensuring that sufficient coolant can be sprayed on the windings at both ends of the stator.

[0058] See also Figure 1 and Figure 6 In one embodiment, a plurality of cooling oil passages 300 are provided, and each cooling oil passage 300 is distributed at intervals along the circumference of the tooth portion 100 or the yoke portion 200. By rationally arranging the cooling oil passages 300, the heat dissipation capacity of the coolant can be maximized while avoiding unnecessary influence on the structural strength of the tooth portion 100 or the yoke portion 200.

[0059] An annular groove 230 communicating with the oil guide groove 220 is provided on the outer circumferential wall of the tooth portion 100 and / or the inner circumferential wall of the yoke portion 200 . The annular groove 230 communicates between the oil guide groove 220 and each cooling oil passage 300 located on the same side.

[0060] The annular groove 230 is used to allow multiple cooling oil channels 300 to be connected to the oil guide groove 220 at the same time, so that the coolant in the oil guide groove 220 can be sprayed out from the multiple cooling oil channels 300, thereby making the coolant spray more evenly on the winding. The annular groove 230 acts as a bridge, allowing the coolant to flow smoothly between the oil guide groove 220 and the cooling oil channel 300.

[0061] Since the yoke 200 and the tooth 100 are tightly matched, the annular groove 230 is provided on one of the yoke 200 and the tooth 100 so that the slide groove is connected with the oil guide groove 220 on both the tooth 100 and the yoke 200 .

[0062] Since the cooling oil passage 300 can be provided on the yoke 200 or the tooth portion 100, the distribution of the annular groove 230 and the cooling oil passage 300 in this embodiment has the following several modes:

[0063] The first distribution mode: the annular groove 230 is only provided on the yoke 200 , and the cooling oil channel 300 is only provided on the yoke 200 ;

[0064] The second distribution mode: the annular groove 230 is provided only on the yoke 200 , and the cooling oil passage 300 is provided only on the tooth portion 100 ;

[0065] The third distribution mode: the annular groove 230 is only provided on the tooth portion 100 , and the cooling oil passage 300 is only provided on the tooth portion 100 ;

[0066] The fourth distribution mode: the annular groove 230 is provided only on the tooth portion 100 , and the cooling oil channel 300 is provided only on the yoke portion 200 ;

[0067] The fifth distribution mode: the annular groove 230 is only provided on the yoke 200 , and the cooling oil passages 300 are provided on both the tooth portion 100 and the yoke 200 ;

[0068] The sixth distribution mode: the annular groove 230 is provided only on the tooth portion 100 , and the cooling oil passage 300 is provided on both the tooth portion 100 and the yoke portion 200 ;

[0069] The seventh distribution mode: the annular groove 230 is provided on both the yoke 200 and the yoke 200 , and the cooling oil channel 300 is provided only on the tooth 100 ;

[0070] An eighth distribution mode: an annular groove 230 is provided on both the yoke 200 and the yoke 200 , and a cooling oil passage 300 is provided only on the yoke 200 ;

[0071] Ninth distribution mode: an annular groove 230 is provided on both the tooth portion 100 and the yoke portion 200 , and a cooling oil passage 300 is provided on both the tooth portion 100 and the yoke portion 200 .

[0072] The setting of the annular groove 230 enables the coolant to be quickly dispersed into each cooling oil channel 300 after flowing through the oil guide groove 220, thereby achieving a more uniform cooling effect. At the same time, the annular groove 230 can also guide the coolant to form a more complex flow path inside the tooth portion 100 or the yoke 200, thereby enhancing the heat transfer effect. By increasing the contact area and contact time between the coolant and the surface of the tooth portion 100 or the yoke 200, the annular groove 230 can significantly improve the cooling efficiency. This helps to more effectively remove the heat generated by the stator surface, reduce the stator temperature, and improve the operating stability and reliability of the motor.

[0073] In one embodiment, cooling oil channels 300 are provided on both the outer peripheral wall of the tooth portion 100 and the inner peripheral wall of the yoke portion 200, and the cooling oil channels 300 on the tooth portion 100 are arranged opposite to the cooling oil channels 300 on the yoke portion 200. The cooling oil channels 300 on the outer peripheral wall of the tooth portion 100 are distributed at intervals along the circumference of the tooth portion 100 to ensure that the coolant can evenly contact and take away the heat generated on the surface of the tooth portion 100. The cooling oil channels 300 on the inner peripheral wall of the yoke portion 200 are also distributed at intervals along the circumference of the yoke portion 200 and are arranged opposite to the cooling oil channels 300 on the outer peripheral wall of the tooth portion 100.

[0074] By relatively arranging the cooling oil passages 300 on the tooth portion 100 and the yoke portion 200, it is possible to ensure that the coolant can form a more direct heat transfer path when flowing through the tooth portion 100 and the yoke portion 200. This helps to more effectively remove the heat generated inside the stator and improve the cooling efficiency. The relatively arranged cooling oil passages 300 can guide the coolant to form a more complex flow path inside the stator, thereby increasing the contact area and contact time between the coolant and the stator surface. This helps to further improve the heat dissipation efficiency and reduce the stator temperature. By rationally arranging the cooling oil passages 300 on the tooth portion 100 and the yoke portion 200, a more efficient cooling effect can be achieved within a limited stator space. This helps to reduce the size of the motor, increase the power density, and meet the requirements of modern motors for compactness and high performance.

[0075] Of course, setting the cooling oil channel 300 on the tooth portion 100 and the cooling oil channel 300 on the yoke 200 relative to each other is only one implementation in the present embodiment. In other implementations, the cooling oil channel 300 on the tooth portion 100 and the cooling oil channel 300 on the yoke 200 may also be staggered.

[0076] In one embodiment, a plurality of protruding structures for winding are provided on the tooth portion 100, and the plurality of protruding structures are arranged at intervals along the circumference of the tooth portion 100, so that the cooling oil channel 300 can be arranged opposite to the protruding structures. In this way, the coolant sprayed from the cooling oil channel 300 can directly fall on the winding, avoiding the coolant falling into the gap between adjacent windings, which can further improve the cooling effect.

[0077] See also Figure 3 In one embodiment, the cooling oil channel 300 is provided with a protruding structure 310 protruding toward the inner cavity. These protruding structures 310 can be in various shapes, such as ribs, fins, corrugations, etc., depending on the structural design and cooling requirements of the motor. The main function of the protruding structure 310 is to increase the contact area between the coolant and the stator surface, and at the same time guide the coolant to form a more complex flow path inside the stator to enhance the heat transfer effect.

[0078] The raised structure 310 can significantly increase the contact area between the coolant and the stator surface, thereby improving the heat transfer efficiency. This helps to more effectively remove the heat generated inside the stator and reduce the stator temperature. The raised structure 310 can guide the coolant to form eddies or turbulence inside the stator, increasing the flow rate and flow range of the coolant. This complex flow path helps to further improve the heat dissipation efficiency and ensure that the coolant can flow evenly through all parts of the stator. In some cases, the raised structure 310 can also serve to enhance the structural strength of the stator. By increasing the support structure inside the stator, the raised structure 310 can improve the deformation resistance and durability of the stator.

[0079] In order to further optimize the effect of the protrusion structure 310, the present invention can also adjust the shape, quantity, distribution, etc. of the protrusion structure 310. For example, the position and quantity of the protrusion structure 310 can be reasonably arranged according to the heat distribution and cooling requirements of the stator to ensure that the coolant can take away the heat more effectively. At the same time, the shape and size of the protrusion structure 310 can also be adjusted to optimize the flow path and flow rate of the coolant to further improve the heat dissipation efficiency.

[0080] In one embodiment, the cross section of the cooling oil channel 300 can be set to be semicircular, and the cross section of the protrusion structure 310 can also be set to be semicircular, so that the shape of the cooling oil channel 300 is as follows: Figure 3 Of course, setting the shapes of the cooling oil channel 300 and the protruding structure 310 to be semicircular is only one implementation in this embodiment, and the semicircular shape has a better effect of expanding the area, but in other implementations, setting the shapes of the cooling oil channel 300 and the protruding structure 310 to be elliptical or polygonal is also possible.

[0081] Through the above embodiments, the present application has the following beneficial effects or advantages: the cooling structure disclosed in the present application achieves efficient cooling of the stator by optimizing the settings of the cooling oil channel 300, the oil guide groove 220 and the protruding structure 310, thereby improving the structural compactness, reliability and performance of the motor. At the same time, this cooling structure also provides strong support for improving the overall performance of the vehicle. By setting the cooling oil channel 300 on the teeth 100 and / or the yoke 200 of the stator and connecting it with the oil guide groove 220, effective cooling of the inside of the stator is achieved, and the coolant can be directly sprayed onto the winding end, significantly reducing the stator temperature and improving the operating efficiency and stability of the motor. The cooling oil channel 300 will not penetrate the stator along the axial direction of the stator, which can effectively avoid affecting the magnetic flux of the stator. The protruding structure 310 protruding toward the inner cavity provided on the cooling oil channel 300 increases the contact area between the cooling oil and the stator surface, reduces the flow resistance of the coolant, and further improves the heat transfer efficiency. The design of the cooling structure allows the coolant to be as close to the stator winding as possible, and the coolant fully cools the stator core and the winding part. By separating the stator teeth 100 and the yoke 200, the iron loss of the motor stator core can be reduced, thereby further improving the working efficiency of the motor.

[0082] Based on the same inventive concept, a second aspect of the present application discloses a motor, which includes a stator, and the stator is configured with a cooling structure of any embodiment of the first aspect.

[0083] The motor using the cooling structure of the present invention can operate stably for a long time because the stator is effectively cooled, reducing failures and downtime caused by overheating. At the same time, due to the improvement of cooling efficiency, the heat dissipation performance of the motor is also significantly improved, which helps to improve the overall performance and efficiency of the motor.

[0084] Based on the same inventive concept, a third aspect of the present application discloses a vehicle having the motor of the second aspect.

[0085] The vehicle equipped with the motor of the present invention has significantly improved power, economy and reliability due to the improved motor performance. In addition, due to the improved motor heat dissipation performance, the running stability of the vehicle in a high temperature environment is also enhanced.

[0086] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described above in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0087] Therefore, the above detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0088] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0089] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0090] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, 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 higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0092] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0093] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A cooling structure, applied to a stator including a tooth portion and a yoke portion sleeved outside the tooth portion, characterized in that: The yoke is provided with an oil guide groove and an oil inlet, the oil guide groove is located on the inner peripheral wall of the yoke, and the oil inlet penetrates the side wall of the yoke and is communicated with the oil guide groove; A cooling oil channel is provided on at least one of the outer circumferential wall of the tooth portion and the inner circumferential wall of the yoke portion, the length of the cooling oil channel is less than the axial length of the stator, one end of the cooling oil channel extends to the end surface of the tooth portion or the yoke portion, and the cooling oil channel is connected to the oil guide groove.

2. The cooling structure according to claim 1, characterized in that: The cooling oil passages are respectively arranged at both ends of the tooth portion and / or the yoke portion, and the cooling oil passages located at both ends of the tooth portion and the yoke portion are respectively located at both sides of the oil guide groove.

3. The cooling structure according to claim 2, characterized in that: The cooling oil channels are respectively arranged at both ends of the yoke; A groove wall of the oil guide groove abuts against an outer peripheral wall of the tooth portion, and a projection of the groove wall of the oil guide groove along the axial direction of the stator is a closed circle.

4. The cooling structure according to claim 3, characterized in that: The oil guide groove is spiral-shaped.

5. The cooling structure according to claim 2, characterized in that: The cooling oil channels are respectively arranged at two ends of the tooth portion; The sum of the axial lengths of the cooling oil passages at both ends of the tooth portion is smaller than the axial length of the tooth portion; and / or The cooling oil passages located at two ends of the tooth portion are staggeredly distributed along the circumference of the tooth portion.

6. The cooling structure according to claim 2, characterized in that: There are multiple cooling oil channels, each of which is distributed at intervals along the circumference of the tooth portion or the yoke portion. An annular groove connected to the oil guide groove is provided on the outer circumferential wall of the tooth portion and / or the inner circumferential wall of the yoke portion. The annular groove is connected between the oil guide groove and each of the cooling oil channels located on the same side.

7. The cooling structure according to any one of claims 1 to 6, characterized in that: The cooling oil passages are arranged on both the outer peripheral wall of the tooth portion and the inner peripheral wall of the yoke portion, and the cooling oil passages on the tooth portion are arranged opposite to the cooling oil passages on the yoke portion.

8. The cooling structure according to any one of claims 1 to 6, characterized in that: The cooling oil channel is provided with a protruding structure protruding toward the inner cavity.

9. A motor, characterized in that: It comprises a stator, wherein the stator is provided with the cooling structure according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the motor as claimed in claim 9.

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