Stator assembly, driving motor and vehicle

Abstract

The utility model discloses a stator assembly, a driving motor and a vehicle. The stator assembly comprises a shell, a stator body and an oil guide device. A containing cavity and an oil inlet communicated with the containing cavity are formed in the shell. The stator body is contained in the containing cavity, an annular groove right opposite to the oil inlet is formed in the peripheral face of the stator body, the annular groove and the shell are matched to define a first oil channel, a second oil channel extending in the axial direction is formed in the stator body, and the second oil channel is communicated with the first oil channel. The oil guide device is arranged at at least one end of the stator body in the axial direction, a winding cavity used for containing the winding is defined between the oil guide device and the end of the shell, a third oil channel is formed in the oil guide device, and the second oil channel is communicated with the winding cavity through the third oil channel. According to the stator assembly, the second oil duct is arranged in the stator body, an additional sealing device is not needed, the overall structure is simple, the cost is low, and liquid leakage is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to a stator assembly, a drive motor and a vehicle. Background Art

[0002] The drive motor assembly is moving towards miniaturization and high power density. The water-cooled drive motor can no longer meet the heat dissipation requirements under high power density. The heat source of the drive motor is mainly the stator core and stator winding of the drive motor. One of the failure modes of the drive motor is that the temperature rise of the drive motor is too high, which leads to the performance reduction of the whole vehicle and the decline of user experience. Therefore, it is very important to cool the stator core and stator winding of the drive motor. In the prior art, a packaging device can be used to wrap the windings and block the stator slots. The slots on the inner surface of the packaging device and the stator slots together form a cooling channel to dissipate heat from the stator and windings. However, this solution requires the packaging device to be sealed with the stator core, which has a complex structure and high cost. In addition, due to the difficulty in controlling the manufacturing tolerances of the core, windings and packaging devices, it is difficult to ensure dimensional accuracy, and insufficient sealing may occur, resulting in coolant leakage. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a stator assembly. According to the stator assembly of the utility model, a second oil channel is arranged in the stator body, and the first oil channel on the outer periphery of the stator body and the third oil channel of the oil guide device are matched with the second oil channel, so that the coolant at the radial outer end of the stator body can be guided to the winding at the radial inner end, thereby improving the heat dissipation effect of the stator body and the winding, and no additional sealing device is required, the overall structure is simple, the cost is low, and it is not easy to leak.

[0004] The utility model also provides a driving motor comprising the stator assembly.

[0005] The utility model also provides a vehicle comprising the driving motor.

[0006] According to the utility model, the stator assembly includes a shell, a stator body and an oil guide device, wherein the shell is formed with a accommodating cavity and an oil inlet connected with the accommodating cavity; the stator body is accommodated in the accommodating cavity and an annular groove directly opposite to the oil inlet is formed on the outer peripheral surface of the stator body, the annular groove cooperates with the shell to define a first oil passage, a second oil passage extending in the axial direction is formed in the stator body, and the second oil passage is connected with the first oil passage; the oil guide device is arranged at at least one end of the stator body in the axial direction and defines a winding cavity for accommodating a winding between the stator body and the end of the shell, a third oil passage is formed in the oil guide device, and the third oil passage connects the second oil passage with the winding cavity.

[0007] According to the stator assembly of the utility model, a shell is provided, and the shell is a structure for protecting the stator. A housing cavity is formed in the shell, and an oil inlet connected to the housing cavity is formed on the shell. The stator body can be assembled into the housing cavity, and the stator assembly can be injected with coolant through the oil inlet. An annular groove facing the oil inlet is formed on the stator body, and a first oil channel can be defined between the annular groove and the shell. The coolant injected through the oil injection port can flow into the first cooling oil channel and flow in the first cooling oil channel to cool the stator body. A second oil channel extending in the axial direction is also provided in the stator body, and the second oil channel is connected to the first oil channel. The coolant in the first oil channel can flow into the second oil channel and cool the stator body in the axial direction of the stator body, thereby improving the cooling effect of the stator assembly to reduce its own temperature. The second oil channel is provided in the stator body, and there is no need to provide an additional sealing device, thereby reducing the complexity of the stator assembly structure and effectively reducing costs.

[0008] According to one embodiment of the utility model, the stator body includes a first stator and a second stator, the first stator is constructed as two stators spaced from each other; the second stator is arranged between the two first stators and respectively connected to the two first stators; wherein the diameter of the second stator is smaller than the diameter of the first stator to define the annular groove.

[0009] According to an embodiment of the present utility model, the second oil passage is structured in a plurality and is arranged at intervals in the circumferential direction of the first stator, and the plurality of the second oil passages are respectively connected to the first oil passage.

[0010] According to an embodiment of the present utility model, the cross-section of the second oil channel is square or rhombus-shaped.

[0011] According to an embodiment of the utility model, the oil guide device includes a first plate and a second plate, the first plate is arranged at both ends of the stator body in the axial direction, and a first oil guide port connected to the second oil channel is provided on the first plate, and the first oil guide port extends in the radial direction; the second plate is arranged on the side of the first plate away from the stator body, and a second oil guide port is formed on the second plate, and the second oil guide port is connected to the radial inner side of the first oil guide port and jointly defines the third oil channel.

[0012] According to an embodiment of the present utility model, the first oil guide port and the second oil guide port are staggered in the radial direction.

[0013] According to an embodiment of the present invention, the first oil guide port and the second oil guide port are configured as a plurality of first oil guide ports corresponding to each other, and the plurality of first oil guide ports and the plurality of second oil guide ports are spaced apart in the circumferential direction of the first plate and the second plate, respectively.

[0014] According to an embodiment of the present invention, the first plate and the second plate are constructed as plastic parts or metal parts.

[0015] The drive motor according to the utility model is briefly described below.

[0016] The drive motor according to the utility model includes the stator assembly in the above-mentioned embodiment. Since the drive motor according to the utility model is provided with the stator assembly in the above-mentioned embodiment, when the stator assembly is assembled into the drive motor, the stator assembly can improve the cooling of the stator body and the winding through its own first oil channel, second oil channel and third oil channel, thereby improving the heat dissipation performance of the drive motor, and no additional sealing structure is required between the three oil channels, which can reduce the assembly cost of the drive motor and the complexity of the manufacturing process, thereby achieving cost reduction and efficiency improvement of the drive motor.

[0017] The vehicle according to the present utility model is briefly described below.

[0018] The vehicle according to the utility model includes the drive motor in the above-mentioned embodiment. Since the vehicle according to the utility model is provided with the drive motor in the above-mentioned embodiment, after the drive motor is assembled to the vehicle, the drive motor itself has good heat dissipation performance, which can improve the performance of the vehicle. At the same time, it can reduce the risk of damage to the vehicle due to overheating of the drive motor, thereby improving the safety of the vehicle.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a structural diagram of a stator assembly according to an embodiment of the utility model;

[0022] Figure 2 It is an assembly diagram of a stator body and an oil guide device according to an embodiment of the utility model;

[0023] Figure 3 is a structural diagram of a stator body according to an embodiment of the utility model;

[0024] Figure 4 is a structural diagram of a second plate according to an embodiment of the utility model;

[0025] Figure 5 It is a structural diagram of a first plate according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] Stator assembly 1;

[0028] Housing 11, oil inlet 111;

[0029] Stator body 12, first stator 121, second stator 122;

[0030] The oil guide device 13, the first plate 131, the first oil guide port 1311, the second plate 132, the second oil guide port 1321;

[0031] The first oil passage 101 , the second oil passage 102 , and the third oil passage 103 . DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the prior art, a packaging device can be used to wrap the winding and block the stator slots. The slots on the inner surface of the packaging device and the stator slots together form a cooling channel to dissipate heat from the stator and windings. However, this solution requires the packaging device to be sealed with the stator core, which has a complex structure and high cost. In addition, due to the difficulty in controlling the tolerance of the core, winding and packaging device, it is difficult to ensure dimensional accuracy, which may result in insufficient sealing and coolant leakage.

[0034] Reference below Figure 1-Figure 5 A stator assembly according to an embodiment of the present invention is described.

[0035] According to the utility model, the stator assembly 1 includes a shell 11, a stator body 12 and an oil guide device 13. The shell 11 is formed with an accommodating cavity and an oil inlet 111 connected with the accommodating cavity; the stator body 12 is accommodated in the accommodating cavity and an annular groove facing the oil inlet 111 is formed on the outer peripheral surface of the stator body 12. The annular groove cooperates with the shell 11 to define a first oil passage 101. A second oil passage 102 extending in the axial direction is formed in the stator body 12, and the second oil passage 102 is connected with the first oil passage 101; the oil guide device 13 is arranged at least one end of the stator body 12 in the axial direction and defines a winding cavity for accommodating the winding between the end of the shell 11, and a third oil passage 103 is formed in the oil guide device 13, and the third oil passage 103 connects the second oil passage 102 with the winding cavity.

[0036] According to the stator assembly 1 of the utility model, a housing 11 is provided. The housing 11 is a structure for protecting the stator. An accommodating cavity is formed in the housing 11. An oil inlet 111 communicating with the accommodating cavity is formed on the housing 11. The stator body 12 can be assembled into the accommodating cavity. The stator assembly 1 can be injected with coolant through the oil inlet 111. An annular groove facing the oil inlet 111 is formed on the stator body 12. A first oil channel 101 can be defined between the annular groove and the housing 11. The coolant injected through the oil injection port can flow into the first cooling oil channel and flow in the first cooling oil channel to cool the stator body 12. A second oil passage 102 extending in the axial direction is also provided in the stator body 12. The second oil passage 102 is communicated with the first oil passage 101. The coolant in the first oil passage 101 can flow into the second oil passage 102 and cool the stator body 12 in the axial direction of the stator body 12, thereby improving the cooling effect of the stator assembly 1 itself. The second oil passage 102 is provided in the stator body 12, and no additional sealing device is required, thereby reducing the complexity of the structure of the stator assembly 1 and effectively reducing the cost. The inside of the stator body 12 here can be understood as the inside of the physical structure of the stator body 12.

[0037] The stator assembly 1 is also provided with an oil guide device 13, which is provided at both ends of the stator body 12 in the axial direction. After assembly, a winding cavity is defined between the oil guide device 13 and the housing 11. The winding can be accommodated in the winding cavity after being assembled with the stator body 12. The provision of the winding cavity facilitates the assembly of the winding and improves the compactness of the stator assembly 1. A third oil passage 103 is formed in the oil guide device 13, and the third oil passage 103 connects the second oil passage 102 with the winding cavity. After the coolant is injected into the oil inlet 111, the coolant in the second oil passage 102 can flow into the winding cavity through the third oil passage 103 to cool the winding. The provision of the oil guide device 13 enables the stator assembly 1 to cool the winding. The oil guide device 13 cooperates with the stator body 12 to connect the second oil passage 102 and the third oil passage 103, and the second oil passage 102 and the third oil passage 103 can achieve cooling of the stator body 12 and the winding without setting an additional sealing structure, thereby reducing the cost of the stator assembly 1 and the process complexity of the stator assembly 1.

[0038] According to one embodiment of the utility model, the stator body 12 includes a first stator 121 and a second stator 122, the first stator 121 is constructed as two spaced apart from each other; the second stator 122 is arranged between the two first stators 121 and respectively connected to the two first stators 121; wherein the diameter of the second stator 122 is smaller than the diameter of the first stator 121 to define an annular groove.

[0039] Specifically, the stator body 12 is provided with two first stators 121 spaced from each other, and a second stator 122 is provided between the two first stators 121. The first stator 121 and the second stator 122 are stacked in sequence in the axial direction. During assembly, the diameter of the second stator 122 can be smaller than the diameter of the first stator 121, so that an annular groove appears at the position of the second stator 122 in the stacked stator body 12. No additional processing steps are required, which simplifies the construction process of the stator body 12 and reduces the processing difficulty.

[0040] In some embodiments, the first stator 121 and the second stator 122 may be formed by stacking a plurality of stator laminations of corresponding sizes.

[0041] According to an embodiment of the utility model, the second oil passage 102 is constructed as a plurality of passages and is arranged at intervals in the circumferential direction of the first stator 121, and the plurality of second oil passages 102 are respectively connected to the first oil passage 101. During processing, the second oil passage 102 can be processed inside the first stator 121, and the second oil passage 102 can be a plurality of passages arranged at intervals in the axial direction of the first stator 121, each of the second oil passages 102 is connected to the first oil passage 101, and the coolant in the first oil passage 101 can flow to the plurality of second oil passages 102 at the same time, and the arrangement of the plurality of second oil passages 102 improves the heat dissipation performance of the stator assembly 1.

[0042] According to an embodiment of the present invention, the cross-section of the second oil passage 102 is square or rhombus-shaped. During processing, the cross-section of the second oil passage 102 can be processed into a square or rhombus-shaped shape, etc. Compared with the solution of processing the cross-section of the second oil passage 102 into a circle, the second oil passage 102 with a square or rhombus-shaped cross-section can increase the heat exchange area between the coolant and the first stator 121, thereby improving the heat dissipation effect of the stator assembly 1.

[0043] According to one embodiment of the utility model, the oil guide device 13 includes a first plate 131 and a second plate 132, the first plate 131 is arranged at both ends of the stator body 12 in the axial direction, and the first plate 131 is provided with a first oil guide port 1311 connected to the second oil passage 102, and the first oil guide port 1311 extends in the radial direction; the second plate 132 is arranged on the side of the first plate 131 away from the stator body 12, and a second oil guide port 1321 is formed on the second plate 132, and the second oil guide port 1321 is connected to the radial inner side of the first oil guide port 1311 and jointly defines the third oil passage 103.

[0044] Since the oil guide device 13 is a structure that guides the coolant in the second oil passage 102 to the winding, the structure of the oil guide device 13 will affect the flow of the coolant. Specifically, the oil guide device 13 is provided with a first plate 131 and a second plate 132, wherein the first plate 131 is provided with a first oil guide port 1311, and the second plate 132 is provided with a second oil guide port 1321. During assembly, the first plate 131 is constructed into two and is respectively disposed at the two ends of the stator body 12, and the second plate 132 can also be constructed into two and is respectively disposed on the side of the two first plates 131 away from the stator body 12. After the first plate 131 and the second plate 132 are assembled, the first oil guide port 1311 and the second oil guide port 1321 are connected to define the third oil passage 103, and one end of the third oil passage 103 is connected to the stator body 12. The second oil channel 102 is connected, and the other end of the third oil channel 103 is connected to the winding cavity, so that the coolant in the second oil channel 102 can enter the winding cavity through the guidance of the third oil channel 103 and then cool the winding. In this process, it is worth noting that the first oil guide port 1311 extends in the radial direction of the stator body 12, and the second oil guide port 1321 is connected to the radial inner side of the first oil guide port 1311. Such a connection method can make the coolant in the second oil channel 102 located at the radial outer end of the stator body 12 flow toward the radial inner end of the stator body 12 and then soak the winding, thereby improving the efficiency of cooling the winding by the coolant.

[0045] According to an embodiment of the utility model, the first oil guide port 1311 and the second oil guide port 1321 are radially staggered. During assembly, the first oil guide port 1311 and the second oil guide port 1321 can be radially staggered to extend the radial length of the third oil passage 103, so that the coolant in the second oil passage 102 can directly act on the inside of the winding, thereby improving the heat dissipation effect of the stator assembly 1 on the winding.

[0046] In some embodiments, the first oil guide port 1311 may extend from the radial outer end toward the radial inner end of the first plate 131 , and the second oil guide port 1321 may extend from the radial inner end toward the radial outer end of the second plate 132 .

[0047] According to an embodiment of the utility model, the first oil guide port 1311 and the second oil guide port 1321 are configured as a plurality of one-to-one corresponding ones, and the plurality of first oil guide ports 1311 and the plurality of second oil guide ports 1321 are respectively arranged at intervals in the circumferential direction of the first plate 131 and the second plate 132. Specifically, the first oil guide port 1311 and the second oil guide port 1321 are configured as a plurality of one-to-one corresponding ones, and the number is the same as the second oil passage 102. The plurality of first oil guide ports 1311 and the plurality of second oil guide ports 1321 are matched to form a plurality of third oil passages 103. The plurality of third oil passages 103 and the plurality of second oil passages 102 are connected to each other in correspondence, so that the coolant can enter the winding cavity from the plurality of third oil passages 103 at the same time to cool the winding, further improving the heat dissipation effect of the stator assembly 1.

[0048] According to an embodiment of the utility model, the first plate 131 and the second plate 132 are constructed as plastic parts or metal parts. During processing, the first plate 131 and the second plate 132 can be corrosion-resistant and high-temperature resistant plastic parts. Constructing the first plate 131 and the second plate 132 as plastic parts can reduce the weight of the stator assembly 1; the first plate 131 and the second plate 132 can also be used for the metal parts of the same specifications as the stator body 12, so as to facilitate the assembly between the first plate 131 and the second plate 132 and the stator body 12. Both of the above processing methods can be selected, and the specific materials can be determined according to the actual manufacturing requirements of the stator assembly 1.

[0049] The drive motor according to the utility model is briefly described below.

[0050] The drive motor according to the utility model includes the stator assembly 1 in the above embodiment. Since the drive motor according to the utility model is provided with the stator assembly 1 in the above embodiment, when the stator assembly 1 is assembled into the drive motor, the stator assembly 1 can improve the cooling of the stator body 12 and the winding through its own first oil channel 101, the second oil channel 102 and the third oil channel 103, thereby improving the heat dissipation performance of the drive motor, and no additional sealing structure is required between the three oil channels, which can reduce the assembly cost of the drive motor and the complexity of the manufacturing process, thereby achieving cost reduction and efficiency improvement of the drive motor.

[0051] The vehicle according to the present utility model is briefly described below.

[0052] The vehicle according to the utility model includes the drive motor in the above-mentioned embodiment. Since the vehicle according to the utility model is provided with the drive motor in the above-mentioned embodiment, after the drive motor is assembled to the vehicle, the drive motor itself has good heat dissipation performance, which can improve the performance of the vehicle. At the same time, it can reduce the risk of damage to the vehicle due to overheating of the drive motor, thereby improving the safety of the vehicle.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0055] In the description of the present invention, "plurality" means two or more.

[0056] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0057] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that: include: A housing, wherein a receiving cavity and an oil inlet communicating with the receiving cavity are formed in the housing; a stator body, the stator body being received in the accommodating cavity and having an annular groove formed on the outer peripheral surface of the stator body facing the oil inlet, the annular groove cooperating with the housing to define a first oil passage, a second oil passage extending in the axial direction being formed in the stator body, the second oil passage being communicated with the first oil passage; An oil guiding device is arranged at at least one end of the stator body in the axial direction and defines a winding cavity for accommodating the winding between the oil guiding device and the end of the shell, and a third oil channel is formed in the oil guiding device, and the third oil channel connects the second oil channel with the winding cavity.

2. The stator assembly according to claim 1, characterized in that The stator body comprises: A first stator, wherein the first stator is configured as two stators spaced apart from each other; A second stator, wherein the second stator is disposed between the two first stators and is respectively connected to the two first stators; The second stator has a diameter smaller than that of the first stator to define the annular groove.

3. The stator assembly according to claim 2, characterized in that: The second oil passages are structured in a plurality and are arranged at intervals in the circumferential direction of the first stator. The plurality of second oil passages are respectively communicated with the first oil passages.

4. The stator assembly according to claim 3, characterized in that: The cross section of the second oil passage is square or rhombus-shaped.

5. The stator assembly according to claim 1, characterized in that: The oil guiding device comprises: A first plate, the first plate being disposed at two axial ends of the stator body, the first plate being provided with a first oil guide port communicating with the second oil passage, the first oil guide port extending in a radial direction; The second plate is arranged on a side of the first plate away from the stator body, and a second oil guide port is formed on the second plate. The second oil guide port is communicated with the radial inner side of the first oil guide port and together define the third oil channel.

6. The stator assembly according to claim 5, characterized in that The first oil guide port and the second oil guide port are staggered in radial direction.

7. The stator assembly according to claim 6, characterized in that The first oil guide ports and the second oil guide ports are configured to be a plurality of ports corresponding to each other, and the plurality of the first oil guide ports and the plurality of the second oil guide ports are respectively arranged at intervals in the circumferential direction of the first plate and the second plate.

8. The stator assembly according to claim 5, characterized in that The first plate and the second plate are configured as plastic parts or metal parts.

9. A driving motor, characterized in that: The stator assembly comprises the stator assembly according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Includes the drive motor as described in claim 9.

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