Stator structure, motor and vehicle

Abstract

The invention relates to the technical field of motors, and provides a stator structure, a motor and a vehicle, the stator structure comprises a stator iron core provided with an oil duct, an inlet of the oil duct is communicated with a shell, two oil outlet holes of the oil duct are formed in the two ends of the stator iron core in the axial direction, the oil duct is partially formed in the axial direction of the stator iron core, and the inlet of the oil duct is communicated with the shell. And the oil duct passes through the yoke part and the tooth part of the stator iron core. According to the technical scheme, the problem of insufficient cooling of the stator core can be solved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular, to a stator structure, a motor and a vehicle. Background Art

[0002] In a concentrated winding motor, there is sufficient space in the stator slot for cooling oil to flow, which is suitable for applying the stator slot cooling solution. However, in the prior art, the current concentrated winding motor oil cooling solution has the following problems: insufficient cooling of the stator core. Summary of the invention

[0003] The technical problem to be solved by the present application is to provide a stator structure, a motor and a vehicle, which can improve the cooling effect on the yoke and the tooth part of the stator core.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions:

[0005] In the first aspect, the present application provides a stator structure, including: a stator core, provided with an oil channel, wherein the inlet of the oil channel is connected to the shell, two oil outlet holes of the oil channel are respectively provided at both ends along the axial direction of the stator core, a part of the oil channel is opened along the axial direction of the stator core, and the oil channel passes through the yoke and tooth part of the stator core.

[0006] As an embodiment, the stator core includes a first core segment, a second core segment located at both ends of the first core segment, a third core segment bonded to the second core segment, and a fourth core segment bonded to the third core segment, the first core segment, the second core segment, the third core segment and the fourth core segment are all provided with an oil guiding part, a plurality of the oil guiding parts are interconnected to form the oil channel, and the structures of the plurality of the oil guiding parts are different.

[0007] As an embodiment, the oil guiding portion of the first core segment is a plurality of first oil guiding grooves arranged along the circumferential interval along the outer edge of the first core segment, the oil guiding portion of the second core segment is a plurality of second oil guiding grooves arranged, and the second oil guiding grooves are respectively connected with the first oil guiding grooves and the stator slots of the stator core; the oil guiding portion of the third core segment is a third oil guiding groove opened along the radial direction of the third core segment, and the third oil guiding groove is connected with the second oil guiding groove; the oil guiding portion of the fourth core segment is an oil outlet hole arranged along the axial direction of the fourth core segment, and the oil outlet hole is connected with the third oil guiding groove.

[0008] As an implementation manner, a winding is provided in the stator slot, and the oil outlet is arranged toward the winding.

[0009] As an embodiment, the second oil guide groove includes a first section connected to the first oil guide groove, a second section connected to the first section, and a third section connected to the second section, the first section and the third section both extend in a radial direction, and the third section is connected to the stator slot.

[0010] As an implementation manner, the third section is connected to the side of the stator slot farthest from the center of the circle.

[0011] As an implementation manner, the third oil guiding groove is opened along the tooth portion of the third core segment.

[0012] As an implementation manner, the stator slot is provided with a notch, and an oil blocking member is provided at the position of the notch.

[0013] In a second aspect, the present application provides a motor, comprising the stator structure provided in the first aspect, and also comprising a shell, wherein the shell is sleeved on the outer surface of the stator core, the shell is provided with a through hole, and the inner circumferential wall of the shell is provided with a circle of oil grooves, and the oil grooves are respectively connected to the through hole and the inlet of the oil channel.

[0014] In a third aspect, the present application provides a vehicle, comprising a motor provided in the second aspect.

[0015] The technical solution of this application has the following effects:

[0016] The stator core is provided with an oil channel, and the inlet of the oil channel is connected to the shell, which is used to guide the cooling oil into the oil channel. Two oil outlet holes of the oil channel are provided at both axial ends of the stator core, so that the cooling oil can be cooled along the axial direction of the stator core. At the same time, the oil channel passes through the yoke and tooth portion of the stator core, so as to cool the yoke and tooth portion of the stator core and reduce the axial thermal resistance of the stator core. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a motor provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of a stator structure provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the structure of the stator structure provided in the embodiment of the present application from different perspectives;

[0021] Figure 4 A schematic cross-sectional structural diagram of one position of a stator structure provided in an embodiment of the present application;

[0022] Figure 5 A schematic cross-sectional structural diagram of another position of the stator structure provided in an embodiment of the present application;

[0023] Figure 6 A schematic cross-sectional structural diagram of another position of the stator structure provided in an embodiment of the present application;

[0024] Figure 7 A schematic diagram of an exploded structure of a stator structure provided in an embodiment of the present application;

[0025] Figure 8 A schematic cross-sectional structural diagram of another position of the stator structure provided in an embodiment of the present application;

[0026] Fig. 9 A schematic diagram of the structure of a first stator punching sheet provided in an embodiment of the present application;

[0027] Fig.10 A schematic diagram of the structure of a second stator punching sheet provided in an embodiment of the present application;

[0028] Fig.11 A schematic diagram of the structure of a third stator punching sheet provided in an embodiment of the present application;

[0029] Fig.12 A schematic structural diagram of a fourth stator punching sheet provided in an embodiment of the present application;

[0030] Fig.13 A schematic diagram of the structure of a shell provided in an embodiment of the present application.

[0031] Icons: 1- stator core; 11- oil channel; 12- first core section; 121- first oil guide groove; 122- notch; 13- second core section; 131- second oil guide groove; 1311- first section; 1312- second section; 1313- third section; 132- channel; 14- third core section; 141- third oil guide groove; 142- long through hole; 15- fourth core section; 151- oil outlet hole; 152- hole; 16- stator slot; 17- winding; 18- oil retaining member; 19- housing; 191- through hole; 192- oil groove. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0033] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] like Figure 1 , 2 As shown in FIG. 7 , in a first aspect, an embodiment of the present application provides a stator structure, including a stator core 1, wherein the stator core 1 is provided with an oil passage 11, wherein the inlet of the oil passage 11 is communicated with the housing 19, thereby enabling cooling oil outside the housing 19 to be guided into the oil passage 11 through the inlet of the oil passage 11, and at the same time, two oil outlet holes 151 of the oil passage 11 are respectively provided at both ends along the axial direction of the stator core 1, thereby increasing the oil outlet and improving the cooling efficiency, and a part of the oil passage 11 is opened along the axial direction of the stator core 1, thereby enabling cooling along the axial direction of the stator core 1 and improving the cooling efficiency, and the oil passage 11 passes through the yoke and tooth portion of the stator core 1, thereby enabling cooling of the yoke and tooth portion of the stator core 1 and reducing the axial thermal resistance of the stator core 1.

[0035] like Figure 2 As shown, as an embodiment, the stator core 1 includes a first core segment 12, a second core segment 13 located at both ends of the first core segment 12, a third core segment 14 bonded to the second core segment 13, and a fourth core segment 15 bonded to the third core segment 14. The first core segment 12, the second core segment 13, the third core segment 14 and the fourth core segment 15 are all provided with oil guide parts, and the multiple oil guide parts are interconnected to form an oil channel 11. The structures of the multiple oil guide parts are different, so that the cooling oil passed by each oil guide part can cool each part, cool each core segment, increase the cooling area, and improve the cooling effect.

[0036] Optionally, the first core segment 12 is disposed in the middle of the stator core 1 so that the cooling oil can be cooled in two directions from the middle to the end, thereby improving the cooling effect.

[0037] Optionally, one first core segment 12 is provided, and two second core segments 13 , three third core segments 14 and four fourth core segments 15 are provided.

[0038] like Figure 3 , 4, 6 to 8, as an embodiment, the oil guide portion of the first core segment 12 is a plurality of first oil guide grooves 121 arranged along the outer edge of the first core segment 12 along the circumferential interval, and the plurality of first oil guide grooves 121 are arranged on the outer edge of the first core segment 12, so that the cooling oil outside the housing 19 can be guided into the oil passage 11, and the oil guide portion of the second core segment 13 is a plurality of second oil guide grooves 131, and the second oil guide grooves 131 are respectively connected to the first oil guide grooves 121 and the stator slots 16 of the stator core 1, so that the winding 17 in the stator slot 16 can be cooled, thereby improving the winding 17 has a heat dissipation capacity; the oil guiding portion of the third core segment 14 is a third oil guiding groove 141 opened along the radial direction of the third core segment 14, the third oil guiding groove 141 is connected to the second oil guiding groove 131, and the third oil guiding groove extends radially, thereby increasing the cooling area of ​​the third core segment 14 and improving the cooling effect; the oil guiding portion of the fourth core segment 15 is an oil outlet hole 151 arranged along the axial direction of the fourth core segment 15, and the oil outlet hole 151 is connected to the third oil guiding groove 141, so that the cooling oil flows out along the axial direction of the stator core 1, which is convenient for collection, and at the same time, it can also reduce the problem of cooling oil splashing.

[0039] Optional, such as Fig. 9 As shown, the first core segment 12 is formed by axially stacking a plurality of first stator core punching sheets, and a plurality of notches 122 are provided on the outer edge of each first stator core punching sheet, and the plurality of notches 122 are evenly arranged along the circumferential direction, and the notches 122 of the plurality of first stator core punching sheets on the same axis are axially connected to form a first oil guide groove 121; Fig.10 As shown, the second core segment 13 is formed by axially stacking a plurality of second stator core punching sheets, and each second stator core punching sheet is provided with a plurality of through-going channels 132, each channel 132 is connected to the stator slot 16, and the channels 132 of the plurality of second stator core punching sheets on the same axis are axially connected to form a second oil guide groove 131; Fig.11 As shown, the third core segment 14 is formed by axially stacking a plurality of third stator core punching sheets, and each third stator core punching sheet is provided with a plurality of through-going long through holes 142, each of the long through holes 142 extends in the radial direction of the third stator core punching sheet, and the long through holes 142 are provided on the tooth portion of the third stator core punching sheet, and the long through holes 142 of the plurality of third stator core punching sheets on the same axis are axially connected to form a third oil guide groove 141; Fig.12 As shown, the fourth core segment 15 is formed by axially stacking a plurality of fourth stator core punching sheets, and each tooth portion of each fourth stator core punching sheet is provided with at least one hole 152, the holes 152 of the plurality of fourth stator core punching sheets on the same axis are axially connected to form at least one oil outlet hole 151, and at least one oil outlet hole 151 is arranged toward the winding 17.

[0040] Optionally, the first stator punching sheet, the second stator punching sheet, the third stator punching sheet and the fourth stator punching sheet are all provided with stator slots 16 .

[0041] like Figure 7 As shown, as an implementation mode, a winding 17 is provided in the stator slot 16, and the oil outlet 151 is arranged toward the winding 17, so that the winding 17 can be cooled and the heat dissipation capacity of the winding 17 is improved; at the same time, the cooling oil flows out from the third oil guide groove 141 to the oil outlet 151, the cross-section is reduced, and the pressure increases when the oil is discharged, so that the cooling oil is sprayed to the winding 17 in a jet effect, thereby improving the cooling efficiency of the winding 17.

[0042] Optionally, a plurality of oil outlet holes 151 may be provided on the same tooth portion in the same direction, and the plurality of oil outlet holes 151 may all face the winding 17 , or at least one of the plurality of oil outlet holes 151 may be provided facing the winding 17 .

[0043] like Figure 3 and 5 As shown, as an embodiment, the second oil guide groove 131 includes a first section 1311 connected to the first oil guide groove 121, a second section 1312 connected to the first section 1311, and a third section 1313 connected to the second section 1312. The first section 1311 and the third section 1313 both extend in the radial direction, and the third section 1313 is connected to the stator slot 16. The first section 1311 and the third section 1313 extend in the radial direction, so that the cooling area of ​​the second core segment 13 can be increased, and the cooling effect of the stator core 1 is further improved. The second section 1312 connects the first section 1311 and the third section 1313, which also increases the cooling area of ​​the second core segment 13, and also guides the cooling oil into the third section 1313. The cooling oil of the third section 1313 can flow into the stator slot 16 to cool the winding 17.

[0044] As an embodiment, the third section 1313 is connected to the side of the stator slot 16 farthest from the center of the circle, so that the position where the third section 1313 is connected to the stator slot 16 is located between the two windings 17 of the same stator slot 16, so that the cooling oil enters the stator slot 16 and can cool the two windings 17 at the same time.

[0045] like Figure 6 As shown, as an implementation mode, the third oil guide groove 141 is opened along the teeth of the third core segment 14 , so as to cool the teeth of the stator core 1 and reduce the axial thermal resistance of the stator core 1 .

[0046] like Figure 1 and 3As shown, as an implementation mode, the stator slot 16 is provided with a notch, and an oil baffle 18 is provided at the position of the notch. By providing the oil baffle 18, the cooling oil can flow out along the axial direction of the stator slot 16. At the same time, the winding 17 can be axially cooled to increase the cooling area of ​​the winding 17. At the same time, it can also prevent the cooling oil from flowing out radially directly along the notch of the stator slot 16.

[0047] Optionally, the oil retaining member 18 includes an overlapping portion and an inserting portion, the inserting portion is inserted into the notch, and the overlapping portion abuts against the end positions of the two teeth.

[0048] Optionally, in some cases, an oil-isolating sleeve may be provided on the inner ring of the stator core 1 so that the oil-isolating sleeve blocks the slot openings of each stator slot 16. Of course, a stator core 1 without slot openings in the stator slot 16 may also be used.

[0049] like Figure 1 and 13 As shown, in the second aspect, an embodiment of the present application provides a motor, which includes the stator structure provided in the first aspect, and also includes a shell 19, the shell 19 is sleeved on the outer surface of the stator core 1, and a through hole 191 is provided on the shell 19. The inner peripheral wall of the shell 19 is provided with a circle of oil grooves 192, and the oil grooves 192 are respectively connected to the through hole 191 and the entrance of the oil channel 11, so that cooling oil can enter through the through hole 191 of the shell 19, and enter into each entrance of the oil channel 11 along the oil grooves 192, so as to comprehensively cool the stator core 1.

[0050] Optionally, the through hole 191 on the housing 19 may be connected to the oil pool through a pipeline.

[0051] In a third aspect, an embodiment of the present application provides a vehicle, on which is installed a motor provided by the second aspect, thereby improving the cooling efficiency of the motor in the vehicle and saving cooling oil.

[0052] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0053] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A stator structure, characterized in that: include: The stator core is provided with an oil passage, wherein the inlet of the oil passage is connected to the shell, two oil outlet holes of the oil passage are respectively provided at both ends along the axial direction of the stator core, a part of the oil passage is opened along the axial direction of the stator core, and the oil passage passes through the yoke and tooth part of the stator core.

2. The stator structure according to claim 1, characterized in that: The stator core includes a first core segment, a second core segment located at both ends of the first core segment, a third core segment bonded to the second core segment, and a fourth core segment bonded to the third core segment. The first core segment, the second core segment, the third core segment, and the fourth core segment are all provided with an oil guiding portion, and a plurality of the oil guiding portions are interconnected to form the oil passage, and the structures of the plurality of the oil guiding portions are different.

3. The stator structure according to claim 2, characterized in that: The oil guiding portion of the first core segment is a plurality of first oil guiding grooves arranged along the outer edge of the first core segment at intervals in the circumferential direction; the oil guiding portion of the second core segment is a plurality of second oil guiding grooves arranged, and the second oil guiding grooves are respectively connected with the first oil guiding grooves and the stator slots of the stator core; the oil guiding portion of the third core segment is a third oil guiding groove opened along the radial direction of the third core segment, and the third oil guiding groove is connected with the second oil guiding groove; the oil guiding portion of the fourth core segment is an oil outlet hole arranged along the axial direction of the fourth core segment, and the oil outlet hole is connected with the third oil guiding groove.

4. The stator structure according to claim 3, characterized in that: A winding is arranged in the stator slot, and the oil outlet is arranged toward the winding.

5. The stator structure according to claim 4, characterized in that: The second oil guide groove includes a first section communicating with the first oil guide groove, a second section communicating with the first section, and a third section communicating with the second section, the first section and the third section both extend in a radial direction, and the third section communicates with the stator slot.

6. The stator structure according to claim 5, characterized in that: The third section is connected to the side of the stator slot farthest from the center of the circle.

7. The stator structure according to claim 6, characterized in that: The third oil guide groove is opened along the tooth portion of the third core segment.

8. The stator structure according to claim 3, characterized in that: The stator slot is provided with a notch, and an oil blocking member is provided at the position of the notch.

9. A motor, characterized in that: The motor comprises a stator structure as claimed in any one of claims 1 to 8, and further comprises a shell, wherein the shell is sleeved on the outer surface of the stator core, the shell is provided with a through hole, and the inner circumferential wall of the shell is provided with a circle of oil grooves, and the oil grooves are respectively connected to the through hole and the inlet of the oil channel.

10. A vehicle, characterized in that: The vehicle is equipped with the motor according to claim 9.

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