Motor and vehicle with same

Abstract

The utility model provides a motor and a vehicle with the same. The motor comprises a housing, the housing comprises a housing body, and the interior of the housing body is provided with a cooling water channel; the stator iron core is arranged in the shell, a plurality of first grooves are formed in the periphery of the stator iron core, the first grooves extend in the axial direction of the stator iron core, and an oil channel is defined by the first grooves and the inner surface of the shell; wherein at least part of the cooling water channel is adjacent to the oil channel, and liquid in the cooling water channel exchanges heat with oil in the oil channel. The plurality of first grooves and the inner surface of the shell form an oil channel in a surrounding mode, an oil body in the oil channel directly cools the stator iron core, the oil channel is arranged adjacent to a cooling water channel in the shell body, liquid in the cooling water channel and the oil body in the oil channel directly exchange heat through the shell body, arrangement of a heat exchanger, a high-power oil pump and a high-power water pump is reduced, and heat exchange efficiency is improved. The problem that a heat exchange system of a motor in the prior art is high in cost is solved.

Description

Technical Field

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

[0002] At present, electric drives generally use independent heat exchangers to achieve heat exchange between the lubricating oil and water of oil-cooled electric drives, thereby taking away the heat of the lubricating oil and ensuring reliable lubrication of the reducer and heat dissipation of the reducer shaft teeth and motor.

[0003] However, independent heat exchangers are generally large in size, especially for high-power electric drives, and conventional heat exchangers are mostly rectangular in shape, which makes it difficult to arrange them along the shape of the electric drive, which is not conducive to miniaturization of the electric drive. In addition, additional oil inlet and outlet interfaces are required for the oil circuit, and water inlet and outlet interfaces for the heat exchange circuit. The increase in the number of connection interfaces increases the risk of oil and water leakage in the electric drive system. In addition, the cost of the electric drive system is increased due to the addition of independent heat exchangers, as well as the pipes, clamps, seals and fixing bolts connecting them.

[0004] In addition, a general external independent heat exchanger needs to introduce the reducer oil and cooling water into the independent heat exchanger for heat exchange. The liquid flow path is long, and the reducer oil and cooling water have large resistance when passing through the heat exchanger. It is necessary to use a larger capacity oil pump and water pump, which further increases the system cost.

[0005] Therefore, there is an urgent need for a low-cost, highly reliable, efficient heat dissipation, and highly integrated heat exchange solution. Utility Model Content

[0006] The main purpose of the utility model is to provide a motor and a vehicle having the same, so as to solve the problem of high cost of the heat exchange system of the motor in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a motor is provided, comprising: a shell, the shell comprising a shell body, a cooling water channel is arranged inside the shell body; a stator core, the stator core is arranged inside the shell, a plurality of first grooves are arranged on the outer periphery of the stator core, the plurality of first grooves extend along the axial direction of the stator core, and the plurality of first grooves and the inner surface of the shell are arranged to form an oil channel; wherein, at least part of the cooling water channel is arranged adjacent to the oil channel, and the liquid in the cooling water channel performs heat exchange with the oil in the oil channel.

[0008] Furthermore, at least one end of the stator core is circumferentially provided with a second groove, the inner surface of the shell and the second groove form an oil storage cavity, the oil storage cavity is connected to the oil channel, and at least part of the cooling water channel is adjacent to the oil storage cavity.

[0009] Furthermore, there are two second grooves, which are respectively arranged at two ends of the stator core, and the two second grooves are both arranged to be in communication with the oil channel.

[0010] Furthermore, the depth of the first groove is smaller than the depth of the second groove.

[0011] Furthermore, the second groove is provided with a plurality of oil injection holes along the circumferential direction.

[0012] Furthermore, one or more ribs are arranged in the cooling water channel.

[0013] Furthermore, the stator core and the housing are interference fitted.

[0014] Furthermore, a protrusion is arranged in the second groove along the circumferential direction of the stator core, and the protrusion is arranged at a distance from the inner surface of the stator core.

[0015] Further, the cooling water channel is arranged in a spiral shape along the axial direction of the stator core or in a U shape along the circumferential direction of the stator core.

[0016] According to another aspect of the present invention, a vehicle is provided, comprising the above-mentioned motor.

[0017] According to the technical solution of the utility model, a shell and a stator core are provided, wherein the shell includes a shell body, and a cooling water channel is provided inside the shell body; the stator core is provided inside the shell, and a plurality of first grooves are provided on the outer periphery of the stator core, wherein the plurality of first grooves extend along the axial direction of the stator core, and the plurality of first grooves and the inner surface of the shell are surrounded to form an oil channel; wherein at least part of the cooling water channel is arranged adjacent to the oil channel, and the liquid in the cooling water channel performs heat exchange with the oil body in the oil channel, and by surrounding the plurality of first grooves and the inner surface of the shell to form an oil channel, the oil body in the oil channel directly cools the stator core, and the oil channel is arranged adjacent to the cooling water channel inside the shell body, and then the liquid in the cooling water channel performs heat exchange with the oil body in the oil channel directly through the shell body, replacing the solution in the prior art of separately providing a heat exchanger for the oil body and other cooling liquids for heat exchange, reducing the provision of a separate heat exchanger, a relatively high-power oil pump and a water pump, reducing the cost of the heat exchange system of the motor, and solving the problem of high cost of the heat exchange system of the motor in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a first embodiment of a motor according to the utility model is shown;

[0020] Figure 2 A schematic structural diagram of a second embodiment of a motor according to the utility model is shown;

[0021] Figure 3 A schematic structural diagram of a third embodiment of a motor according to the utility model is shown;

[0022] Figure 4 A structural schematic diagram of a fourth embodiment of a motor according to the utility model is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Shell; 100. Shell body; 11. Cooling water channel;

[0025] 20. stator core; 21. first groove; 22. second groove; 23. oil injection hole; 24. sealing ring groove;

[0026] 31. Oil channel; 32. Oil storage chamber. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0031] Combination Figures 1 to 4 As shown, according to a specific embodiment of the utility model, a motor is provided.

[0032] Specifically, the motor includes a shell 10 and a stator core 20, the shell 10 includes a shell body 100, and a cooling water channel 11 is arranged inside the shell body 100; the stator core 20 is arranged inside the shell 10, and a plurality of first grooves 21 are arranged on the outer periphery of the stator core 20, and the plurality of first grooves 21 extend along the axial direction of the stator core 20, and the plurality of first grooves 21 and the inner surface of the shell 10 are surrounded to form an oil channel 31; wherein, at least part of the cooling water channel 11 is arranged adjacent to the oil channel 31, and the liquid in the cooling water channel 11 performs heat exchange with the oil in the oil channel 31.

[0033] Combination Figures 1 to 3 As shown, in this embodiment, a housing 10 and a stator core 20 are provided, the housing 10 includes a housing body 100, and a cooling water channel 11 is provided inside the housing body 100; the stator core 20 is provided inside the housing 10, and a plurality of first grooves 21 are provided on the outer periphery of the stator core 20, and the plurality of first grooves 21 extend along the axial direction of the stator core 20, and the plurality of first grooves 21 and the inner surface of the housing 10 are surrounded to form an oil channel 31; wherein, at least part of the cooling water channel 11 is provided adjacent to the oil channel 31, and the liquid in the cooling water channel 11 performs heat exchange with the oil in the oil channel 31, and the plurality of first grooves 21 are provided to form an oil channel 31; The first groove 21 and the inner surface of the shell 10 are surrounded by an oil channel 31, so that the oil in the oil channel 31 directly cools the stator core 20. The oil channel 31 is arranged adjacent to the cooling water channel 11 inside the shell body 100, so that the liquid in the cooling water channel 11 and the oil in the oil channel 31 directly exchange heat through the shell body 100, replacing the solution of separately setting up a heat exchanger for the oil and other cooling liquids for heat exchange in the prior art, reducing the setting of a separate heat exchanger, a relatively high-power oil pump and a water pump, reducing the cost of the motor heat exchange system, and solving the problem of high cost of the motor heat exchange system in the prior art.

[0034] Furthermore, at least one end of the stator core 20 is circumferentially provided with a second groove 22, and the inner surface of the shell 10 and the second groove 22 enclose an oil storage cavity 32, the oil storage cavity 32 is connected to the oil channel 31, and at least part of the cooling water channel 11 is adjacent to the oil storage cavity 32.

[0035] Combination Figure 1 and Figure 2 As shown, in the present embodiment, at least one end of the stator core 20 is circumferentially provided with a second groove 22, and the inner surface of the housing 10 and the second groove 22 are arranged to form an oil storage chamber 32. Such an arrangement can increase the contact area between the oil body and the stator core 20, and better realize the heat dissipation of the stator core 20. The oil storage chamber 32 is arranged to be connected with the oil channel 31, so that the oil body in the oil storage chamber 32 and the oil channel 31 can flow and dissipate heat, and at least part of the cooling water channel 11 is arranged adjacent to the oil storage chamber 32, so that the oil body in the second groove 22 can exchange heat with the liquid in the cooling water channel 11, further improving the efficiency of heat exchange, replacing the solution of separately setting a heat exchanger to exchange heat between the oil body and other cooling liquids in the prior art, reducing the cost of the heat exchange system, and facilitating the miniaturization of the drive motor, thereby increasing the practicality of the motor.

[0036] Furthermore, there are two second grooves 22 , which are respectively disposed at two ends of the stator core 20 , and the two second grooves 22 are both disposed in communication with the oil passage 31 .

[0037] Combination Figure 1 As shown, there are two second grooves 22, which are respectively arranged at both ends of the stator core 20, and the inner surface of the shell 10 and the second grooves 22 are surrounded by an oil storage cavity 32. Such an arrangement can increase the contact area between the oil body and the stator core 20, and better realize the heat dissipation of the stator core 20. The two second grooves 22 are arranged in communication with the oil channel 31, so that the two oil storage cavities 32 and the oil body in the oil channel 31 can circulate, and at least part of the cooling water channel 11 is arranged adjacent to the oil storage cavity 32, so that the oil body in the second groove 22 and the liquid in the cooling water channel 11 can exchange heat, thereby enhancing the cooling effect of the oil body on the stator core 20, replacing the solution of separately setting a heat exchanger to exchange heat between the coolant and the oil body in the prior art, reducing the arrangement of the oil path inlet and outlet and the water path inlet and outlet, reducing the number of connection interfaces, reducing the leakage risk of the oil body and other cooling liquids in the electric drive system, and increasing the safety of the motor.

[0038] Furthermore, the depth of the first groove 21 is less than the depth of the second groove 22. Such a configuration is more conducive to the oil in the second groove 22 flowing along the circumferential direction of the stator core 20 to take away the heat of the stator core 20, and the oil in the first groove 21 moves along the axial direction of the stator core 20, so that the oil in the first groove 21 can directly exchange heat with the liquid in the cooling water channel 11 through the inner surface of the housing 10 as much as possible, quickly taking away the heat radiated from the motor winding to the motor housing 10, and realizing efficient heat dissipation of the motor.

[0039] Furthermore, the second groove 22 is provided with a plurality of oil injection holes 23 along the circumferential direction.

[0040] In this embodiment, the second groove 22 is provided with a plurality of oil injection holes 23 along the circumferential direction, and a closed pressure oil space is formed on both sides of the second groove 22 through a sealing ring. The oil is sprayed to the end of the motor winding through the plurality of oil injection holes 23 arranged along the circumferential direction, thereby directly cooling the end of the motor winding.

[0041] Furthermore, one or more ribs are arranged in the cooling water channel 11 .

[0042] In this embodiment, one or more convex ribs are arranged in the cooling water channel 11, and such arrangement can increase the heat exchange area between the shell 10 and the cooling liquid in the cooling water channel 11, thereby further improving the efficiency of heat exchange.

[0043] Furthermore, the stator core 20 and the housing 10 are interference fitted.

[0044] In this embodiment, the stator core 20 and the housing 10 are interference fitted. In the area where the stator core 20 is interference-fitted, the stator core 20 can also transfer heat through the inner wall of the housing 10 to the coolant in the cooling water channel 11 for cooling. Compared with the traditional independent radiator that only exchanges heat through the reducer oil and cooling water, the heat exchange efficiency is improved and the heat dissipation effect of the heat dissipation system of the motor is further optimized.

[0045] Furthermore, a protrusion is provided in the second groove 22 along the circumferential direction of the stator core 20 , and the protrusion is provided at a distance from the inner surface of the stator core 20 .

[0046] In this embodiment, a protrusion is arranged in the second groove 22 along the circumferential direction of the stator core 20, and the protrusion is arranged at a distance from the inner surface of the stator core 20. This arrangement is to play a pressurizing role when a closed pressure oil space is formed by a sealing ring on both sides of the second groove 22, so that the multiple oil injection holes 23 arranged along the circumference can spray the oil to the end of the motor winding, thereby directly cooling the end of the motor winding.

[0047] Furthermore, the cooling water channel 11 is disposed in a spiral shape along the axial direction of the stator core 20 or in a U shape along the circumferential direction of the stator core 20 .

[0048] In this embodiment, the cooling water channel 11 is spirally arranged along the axial direction of the stator core 20, increasing the flow area of ​​the cooling liquid in the cooling water channel 11, so that the cooling water channel 11 and the oil in the first groove 21 and the second groove 22 transfer heat to the coolant in the cooling water channel 11 through the inner wall of the shell 10 for cooling, thereby improving the heat exchange efficiency and increasing the degree of integration of the motor.

[0049] Combination Figure 2 As shown, in one embodiment of the present application, the cooling water channel 11 is arranged in a U shape along the circumferential direction of the stator core 20, so that the cooling water channel 11 and the oil in the first groove 21 and the second groove 22 transfer heat to the coolant in the cooling water channel 11 through the inner wall of the shell 10 for cooling, thereby improving the heat exchange efficiency, increasing the degree of integration of the motor, and reducing the cost of the heat exchange system of the motor.

[0050] In another embodiment of the present application, the heat exchange effect can be adjusted by controlling the flow rate of the cooling liquid in the cooling water channel 11. When the oil temperature is low, the supply of cooling liquid can be reduced or stopped to quickly increase the oil temperature to the efficient operating temperature range of the motor; when the oil temperature and the motor temperature are high, the flow rate of cooling liquid is increased to quickly achieve temperature exchange between the oil and the cooling liquid, thereby achieving effective heat dissipation of the motor stator core 20 and the oil.

[0051] According to another aspect of the present invention, a vehicle is provided, comprising the above-mentioned motor.

[0052] Specifically, the motor includes a shell 10 and a stator core 20, the shell 10 includes a shell body 100, and a cooling water channel 11 is arranged inside the shell body 100; the stator core 20 is arranged inside the shell 10, and a plurality of first grooves 21 are arranged on the outer periphery of the stator core 20, and the plurality of first grooves 21 extend along the axial direction of the stator core 20, and the plurality of first grooves 21 and the inner surface of the shell 10 are surrounded to form an oil channel 31; wherein, at least part of the cooling water channel 11 is arranged adjacent to the oil channel 31, and the liquid in the cooling water channel 11 performs heat exchange with the oil in the oil channel 31.

[0053] Combination Figures 1 to 3As shown, in this embodiment, a housing 10 and a stator core 20 are provided, the housing 10 includes a housing body 100, and a cooling water channel 11 is provided inside the housing body 100; the stator core 20 is provided inside the housing 10, and a plurality of first grooves 21 are provided on the outer periphery of the stator core 20, and the plurality of first grooves 21 extend along the axial direction of the stator core 20, and the plurality of first grooves 21 and the inner surface of the housing 10 are surrounded to form an oil channel 31; wherein, at least part of the cooling water channel 11 is provided adjacent to the oil channel 31, and the liquid in the cooling water channel 11 performs heat exchange with the oil in the oil channel 31, and the plurality of first grooves 21 are provided to form an oil channel 31; The first groove 21 and the inner surface of the shell 10 are surrounded by an oil channel 31, so that the oil in the oil channel 31 directly cools the stator core 20. The oil channel 31 is arranged adjacent to the cooling water channel 11 inside the shell body 100, so that the liquid in the cooling water channel 11 and the oil in the oil channel 31 directly exchange heat through the shell body 100, replacing the solution of separately setting up a heat exchanger for the oil and other cooling liquids for heat exchange in the prior art, reducing the setting of a separate heat exchanger, a relatively high-power oil pump and a water pump, reducing the cost of the motor heat exchange system, and solving the problem of high cost of the motor heat exchange system in the prior art.

[0054] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0055] 1. A highly integrated motor heat exchange system solution is provided. The housing 10 includes a housing body 100. A cooling water channel 11 is arranged inside the housing body 100. A plurality of first grooves 21 arranged on the outer periphery of the stator core 20 and the inner surface of the housing 10 are arranged to form an oil channel 31. Second grooves 22 arranged along the circumferential direction at both ends of the stator core 20 and the inner surface of the housing 10 are arranged to form an oil storage cavity 32. The inner wall of the motor housing 10 is used as a heat exchange medium to realize heat exchange of cooling water in the heat exchange system integrated with the oil body, the stator core 20 and the motor housing 10.

[0056] 2. The heat exchange area can be adjusted to meet different heat exchange requirements by adjusting the flow area of ​​the cooling water channel 11 in the housing 10 or adding ribs in the cooling water channel 11. There is no need to set up an additional independent heat exchanger for heat exchange, which reduces the number of connecting components, reduces the cost of the heat exchange system of the motor, reduces the risk of leakage of the oil and coolant, and improves the reliability of the electric drive system. In addition, the flow path of the oil and coolant is greatly shortened, and the reducer oil and cooling water resistance is reduced compared to using an external heat exchanger, and the pressure requirements for the oil pump and water pump are reduced, which is conducive to reducing system costs.

[0057] 3. There is no need to set up an additional independent heat exchanger for heat exchange, which is conducive to realizing the heat exchanger solution of miniaturized electric drive design. Compared with the traditional oil-cooled motor housing, the motor housing stiffness and strength are improved, which is conducive to improving the NVH level and structural reliability of the motor housing.

[0058] 4. A second groove 22 is circumferentially arranged at at least one end of the stator core 20. The inner surface of the housing 10 and the second groove 22 are arranged to form an oil storage cavity 32. Such an arrangement can increase the contact area between the oil and the stator core 20, thereby better realizing the heat dissipation of the stator core 20. The oil in the first groove 21 and the second groove 22 can directly exchange heat with the liquid in the cooling water channel 11 through the inner surface of the housing 10, quickly taking away the heat radiated from the motor winding to the motor housing 10, thereby realizing efficient heat dissipation of the motor.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present utility model.

[0061] 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.

[0062] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A motor, characterized in that: include: A housing (10), the housing (10) comprising a housing body (100), wherein a cooling water channel (11) is provided inside the housing body (100); A stator core (20), the stator core (20) being arranged inside the housing (10), a plurality of first grooves (21) being arranged on the outer periphery of the stator core (20), the plurality of first grooves (21) extending along the axial direction of the stator core (20), and the plurality of first grooves (21) and the inner surface of the housing (10) forming an oil passage (31); At least part of the cooling water channel (11) is arranged adjacent to the oil channel (31), and the liquid in the cooling water channel (11) performs heat exchange with the oil in the oil channel (31).

2. The motor according to claim 1, characterized in that At least one end of the stator core (20) is provided with a second groove (22) along the circumferential direction, the inner surface of the housing (10) and the second groove (22) are arranged to form an oil storage cavity (32), the oil storage cavity (32) is arranged to communicate with the oil channel (31), and at least part of the cooling water channel (11) is arranged adjacent to the oil storage cavity (32).

3. The motor according to claim 2, characterized in that There are two second grooves (22), the two second grooves (22) are respectively arranged at two ends of the stator core (20), and the two second grooves (22) are both arranged to communicate with the oil passage (31).

4. The motor according to claim 2 or 3, characterized in that: The depth of the first groove (21) is smaller than the depth of the second groove (22).

5. The motor according to claim 2 or 3, characterized in that: The second groove (22) is provided with a plurality of oil injection holes (23) along the circumferential direction.

6. The motor according to claim 1, characterized in that One or more convex ribs are arranged in the cooling water channel (11).

7. The motor according to claim 1, characterized in that The stator core (20) and the housing (10) are interference fitted.

8. The motor according to claim 2 or 3, characterized in that: A protrusion is arranged in the second groove (22) along the circumferential direction of the stator core (20), and the protrusion is arranged at a distance from the inner surface of the stator core (20).

9. The motor according to claim 1, characterized in that The cooling water channel (11) is arranged in a spiral shape along the axial direction of the stator core (20) or in a U shape along the circumferential direction of the stator core (20).

10. A vehicle comprising an electric motor, characterized in that: The motor is the motor according to any one of claims 1 to 9.

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