Stator core, motor and vehicle

Abstract

The present disclosure relates to a stator core, a motor and a vehicle, wherein the two ends of the stator core are respectively formed by laminating a plurality of first punching sheets arranged in an axial direction, and an oil injection hole is provided on the first punching sheet, and the oil injection holes of the plurality of first punching sheets overlap and form an oil injection channel, wherein the projections of at least part of the oil injection holes of any two adjacent first punching sheets in the axial direction of the stator core are arranged at an angle to each other. In the stator core provided by the present disclosure, the oil ring can be omitted, and the oil injection channel is directly integrated and designed on the stator core, so as to realize direct oil injection cooling of the stator core without an oil ring, reduce the number of parts, improve assembly efficiency and reduce costs. The oil injection holes of the two adjacent first punching sheets are arranged at an angle to each other, and the flow area at the oil injection channel is suddenly reduced, and the pressure is increased, so as to realize the oil injection effect, so as to cool the stator winding at the end and improve the heat dissipation effect of the stator winding.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular to a stator core, a motor and a vehicle. Background Art

[0002] As the core component of new energy vehicles, how to improve the motor's heat dissipation capacity has become a research direction in the industry in order to increase the continuous power of the motor. The cooling methods of the motor are mainly divided into oil cooling, air cooling, water cooling, etc. With the continuous improvement of the power density of the electric drive of new energy vehicles, the heat generation of the stator core has gradually increased, and oil cooling technology has shown obvious advantages. In related technologies, the mainstream structure of oil cooling is that the stator core and the oil ring work together to achieve the cooling of the stator core and the end stator winding, which requires more than two parts, affecting the assembly efficiency. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a stator core, a motor and a vehicle.

[0004] According to a first aspect of an embodiment of the present disclosure, a stator core is provided, wherein both ends of the stator core are respectively formed by stacking a plurality of first punching sheets stacked in an axial direction, the first punching sheets are provided with oil injection holes, and the oil injection holes of the plurality of first punching sheets overlap and form an oil injection channel, wherein the projections of at least part of the oil injection holes of any two adjacent first punching sheets in the axial direction of the stator core are arranged at angles to each other.

[0005] Optionally, the oil injection holes are multiple and spaced apart along the circumferential direction, wherein:

[0006] The distances between the centers of the plurality of oil injection holes and the central axis of the stator core are equal, and / or,

[0007] The distances between the outer ends of the plurality of oil injection holes and the central axis of the stator core are equal; and / or,

[0008] The distances between the inner ends of the plurality of oil injection holes and the central axis of the stator core are equal.

[0009] Wherein, at least some of the oil injection holes of any two adjacent first punching sheets partially overlap, so that the flow area of ​​the oil injection channel is reduced.

[0010] Optionally, the plurality of fuel injection holes are divided into a plurality of fuel injection hole groups, and in any two adjacent first punching sheets, the fuel injection holes in one fuel injection hole group are at least partially arranged crosswise with the fuel injection holes in the other fuel injection hole group.

[0011] Optionally, the oil injection holes are arranged to be inclined relative to the radial direction of the first punching sheet, and the oil injection holes of two adjacent first punching sheets have different inclination directions.

[0012] Optionally, the plurality of fuel injection hole groups are divided into a first fuel injection hole group and a second fuel injection hole group alternately arranged along the circumferential direction, each of the fuel injection hole groups includes at least two fuel injection holes at angles to each other, the two first fuel injection holes in the first fuel injection hole group are at a first angle to each other, the two second fuel injection holes in the second fuel injection hole group are at a second angle to each other, one of the first angle and the second angle has an opening facing outward, and the other has an opening facing inward, and the first fuel injection holes and the second fuel injection holes are cross-arranged.

[0013] Optionally, the oil injection holes are long strip holes with their major axes arranged radially, two first oil injection holes in the first oil injection hole group are respectively located on both sides of the stator core in the radial direction, and the distance between the inner ends of the two first oil injection holes is smaller than the distance between the outer ends;

[0014] The two second oil injection holes in the second oil injection hole group are respectively located on both sides of the stator core in the radial direction, and the distance between the inner ends of the two second oil injection holes is greater than the distance between the outer ends.

[0015] Optionally, the plurality of fuel injection holes are divided into a plurality of fuel injection hole groups arranged at intervals along the circumferential direction, each of the fuel injection hole groups includes a plurality of fuel injection holes of different shapes, and among the plurality of fuel injection holes,

[0016] The fuel injection hole No. I and the fuel injection hole No. II are arranged symmetrically with respect to the radial direction of the first punching plate, and / or,

[0017] The fuel injection hole No. III is arranged symmetrically with respect to the radial direction of the first punching plate;

[0018] The IV injection hole includes at least two single holes arranged radially symmetrically with respect to the first punching plate.

[0019] The oil injection holes of different shapes of two adjacent first punching plates are cross-arranged.

[0020] Optionally, the fuel injection hole No. I and the fuel injection hole No. II are respectively Z-shaped holes, the fuel injection hole No. III is a cross hole, and the single hole is a long hole. In two adjacent first punching sheets, the fuel injection hole No. III of one is located between the fuel injection hole No. I and the fuel injection hole No. II of the other, and the two single holes of the fuel injection hole No. IV of one intersect with the horizontal section of the fuel injection hole No. III of the other.

[0021] Optionally, the stator core has an oil inlet chamber located in the middle, an oil injection chamber located at both ends, and a cooling channel connecting the oil inlet chamber and the oil injection chamber, the oil injection hole is connected to the oil injection chamber, the cooling medium in the oil inlet chamber enters the oil injection chamber through the cooling channel, and is sprayed out from both ends through the oil injection hole.

[0022] Optionally, the stator core has multiple second punches and third punches stacked in the axial direction, the axial diameter of the second punch is smaller than the axial diameter of the third punch, multiple second punches are stacked to form the oil inlet chamber and the oil injection chamber respectively, the third punch is provided with an opening, multiple third punches are stacked and the openings are at least partially connected to form the cooling channel.

[0023] Optionally, two adjacent third punching sheets are rotated at a preset angle, and the opening portions are connected to form the inclined cooling channel.

[0024] Optionally, the axial diameter of the second punch is larger than the distance from the inner end of the oil injection hole to the central axis of the stator core and smaller than the distance from the outer end of the oil injection hole to the central axis of the stator core.

[0025] Optionally, a plurality of protrusions arranged at intervals in the circumferential direction are provided on the outer periphery of the second punching sheet, and the protrusions are provided with connecting flow channels extending in the axial direction.

[0026] Optionally, the axial width of the oil inlet chamber is greater than the axial width of the oil injection chambers on both sides.

[0027] According to a second aspect of an embodiment of the present disclosure, there is provided a motor comprising the above-mentioned stator core.

[0028] According to a third aspect of an embodiment of the present disclosure, a vehicle is provided, comprising the motor provided by the present disclosure.

[0029] The technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: in the stator core provided by the present disclosure, the oil ring may be omitted, and the oil injection channel may be directly integrated and designed on the stator core, thereby realizing direct oil injection cooling of the stator core without an oil ring, reducing the number of parts, improving assembly efficiency, and reducing costs. The oil injection holes of two adjacent first punching sheets are arranged at an angle to each other, and the flow area at the oil injection channel is suddenly reduced, and the pressure is increased, so as to realize the oil injection effect, cool the stator winding at the end, and improve the heat dissipation effect of the stator winding.

[0030] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0032] Figure 1 It is a schematic structural diagram of a stator core according to an exemplary embodiment.

[0033] Figure 2 and Figure 3 The figure is a flow diagram of a cooling medium in a stator core according to an exemplary embodiment.

[0034] Figure 4 It is a schematic structural diagram of a first punching sheet of a stator core according to an exemplary embodiment.

[0035] Figure 5 yes Figure 4 A partial enlarged view of part A.

[0036] Figure 6 and Figure 7 It is a schematic structural diagram of a second punching sheet of a stator core according to an exemplary embodiment.

[0037] Figure 8 and Fig. 9 It is a schematic structural diagram of a third punching sheet of a stator core according to an exemplary embodiment.

[0038] Fig.10 is a schematic structural diagram of a stator core according to another exemplary embodiment.

[0039] Fig.11 It is a schematic structural diagram of a single-piece first punching sheet in a stator core according to another exemplary embodiment.

[0040] Fig.12 yes Fig.11 A partial enlarged view of part B.

[0041] Fig.13 The figure is a schematic diagram of assembling a plurality of first punching sheets in a stator core according to another exemplary embodiment.

[0042] Fig.14 yes Fig.13 A partial enlarged view of part C.

[0043] Description of Reference Numerals

[0044] 1-stator core; 11-first punching plate; 110-injection hole; 111-first injection hole group; 112-second injection hole group; 1110-first injection hole; 1120-second injection hole; 1100-injection hole group; 1111-I injection hole; 1112-II injection hole; 1113-III injection hole; 1114-IV injection hole; 100-oil inlet chamber; 120-injection chamber; 130-cooling channel; 12-second punching plate; 121-first lamination group; 122-second lamination group; 123-protrusion; 1230-connecting channel; 13-third punching plate; 131-opening. DETAILED DESCRIPTION

[0045] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0046] In the present disclosure, unless otherwise specified, directional words such as "axial" and "radial" are generally used relative to the central axis of the stator core in the motor provided by the present disclosure, and "inside" and "outside" may refer to the inside and outside of the corresponding component contour or the inside or outside of the environment in which it is located, depending on the specific context. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and have no order or importance.

[0047] In an exemplary embodiment of the present disclosure, Figure 1 and Figure 4 As shown, a stator core 1 is provided, which can be formed by stacking and laminating three kinds of punching sheets in the axial direction, and is formed by stacking and laminating a plurality of first punching sheets 11 arranged in the axial direction at both ends of the stator core 1, and an oil injection hole 110 is provided on the first punching sheet 11, and the oil injection holes 110 of the plurality of first punching sheets 11 overlap and form an oil injection channel, wherein the projections of at least part of the oil injection holes 110 of any two adjacent first punching sheets 11 in the axial direction of the stator core 1 are arranged at an angle to each other. It should be noted that in the embodiment where the oil injection holes 110 provided in the present disclosure are long strip holes, the "at an angle to each other" here can include that the oil injection holes 110 of one first punching sheet 11 are arranged in the radial direction, and the oil injection holes 110 of another first punching sheet 11 are randomly tilted, and can be crossed in the middle or at the end. Of course, the oil injection holes 110 of the two first punching sheets 11 can also be arranged with an inclination relative to the radial direction, which all belong to the protection scope of the present disclosure. The shapes of the oil injection holes 110 on different first punching sheets 11 may be the same or different. The former will be described in detail below using the long strip hole shown in the figure as an example.

[0048] In the stator core 1 provided by the present disclosure, the oil ring can be omitted, and the oil injection channel is directly integrated and designed on the stator core 1, so that the stator core 1 without the oil ring is directly sprayed with oil for cooling, which reduces the number of parts, improves the assembly efficiency, and reduces the cost. The oil injection holes 110 of the two adjacent first punching sheets 11 are arranged at an angle to each other, and the flow area at the oil injection channel is suddenly reduced, and the pressure is increased, so as to achieve the oil injection effect, so as to cool the stator winding at the end and improve the heat dissipation effect of the stator winding.

[0049] In an embodiment in which an oil injection hole 110 is provided on the first punching plate 11, Figure 5 As shown, the fuel injection holes 110 are arranged to be inclined relative to the radial direction of the first punching plate 11, and the inclination directions of the fuel injection holes 110 of two adjacent first punching plates 11 are different. The "inclination" here means that in the embodiment where the fuel injection hole 110 is a long hole, its long axis direction forms an angle with the radial direction of the first punching plate 11, and in fuel injection holes 110 of other shapes, its central axis may form an angle with the radial direction, which can be specifically designed according to the specific shape of the fuel injection hole 110. One of the two adjacent first punching plates 11 may be provided with a first fuel injection hole 1110, and the other may be provided with a second fuel injection hole 1120. When multiple first punching plates 11 are stacked together, the first fuel injection hole 1110 and the second fuel injection hole 1120 are arranged at an angle to each other, which will be Figure 5 The shaded area shown in the figure is connected, and the area where the oil injection is actually realized is significantly reduced. When the flow rate remains constant, the pressure increases rapidly, thereby realizing the oil injection effect on the stator winding.

[0050] In an exemplary embodiment of the present disclosure, Figure 4 As shown, the injection holes 110 can be multiple and spaced along the circumferential direction, the distances from the centers of the multiple injection holes 110 to the central axis of the stator core 1 are equal, the distances from the outer ends of the multiple injection holes 110 to the central axis of the stator core 1 are equal, and the distances from the inner ends of the multiple injection holes 110 to the central axis of the stator core 1 are equal. Here, "inner end" and "outer end" refer to the radial direction, the side close to the inner circumferential wall of the stator core 1 is the inner end, and the side away from the inner circumferential wall of the stator core 1 is the outer end, that is, the outer boundaries of the multiple injection holes 110 are located at the same radial height, and the inner boundaries of the multiple injection holes 110 are located at the same radial height, so that multiple first punching sheets 11 can form an injection channel by appropriate rotation. In the embodiment where the multiple injection holes 110 have the same shape, only one kind of punch and die for punching the first punching sheet 11 is required, which reduces the types of stamping dies and reduces manufacturing costs. In the embodiments of the multiple fuel injection holes 110 with different shapes described below, the centers of the multiple fuel injection holes 110 are located at the same radial height, and the punches and die for stamping different fuel injection holes 110 can be installed at the same position, which can realize the reuse of components and parts in the stamping die, thereby reducing manufacturing costs.

[0051] In an exemplary embodiment of the present disclosure, a plurality of injection holes 110 are divided into a plurality of injection hole groups, and the plurality of injection hole groups are divided into a first injection hole group 111 and a second injection hole group 112 arranged alternately along the circumferential direction. In any two adjacent first punching sheets 11, the first injection hole group 111 of one and the second injection hole group 112 of the other are arranged crosswise. The number and structure of the injection holes 110 in the first injection hole group 111 and the second injection hole group 112 can be the same or different, and of course are not limited to the first injection hole group 111 and the second injection hole group 112, and there can also be other forms of third injection hole groups, or even fourth injection holes. In the circumferential direction, a plurality of injection hole groups can be arranged continuously, and of course a blank area can be set between two adjacent injection hole groups. Of course, when it is necessary to increase the injection amount and improve the injection effect, a plurality of injection hole groups can be arranged continuously. The injection holes 110 in the first injection hole group 111 and the second injection hole group 112 can be tilted at will, as long as the two can be crossed.

[0052] In an embodiment where a plurality of first punching sheets 11 have the same structure and each first punching sheet 11 is provided with a plurality of oil injection holes 110, as shown in FIG. Figure 5 As shown, each fuel injection hole group includes at least two fuel injection holes 110 at an angle to each other, the two first fuel injection holes 1110 in the first fuel injection hole group 111 form a first angle to each other, and the two second fuel injection holes 1120 in the second fuel injection hole group 112 form a second angle to each other, and the opening of one of the first angle and the second angle faces outward, and the opening of the other faces inward. When multiple first punching sheets 11 are stacked and arranged, two adjacent first punching sheets 11 are rotated by a first preset angle, and the positions of the first fuel injection hole group 111 of one correspond to the positions of the second fuel injection hole group 112 of the other, and the first fuel injection holes 1110 of the first fuel injection hole group 111 and the second fuel injection holes 1120 of the second fuel injection hole group 112 are arranged crosswise to form the fuel injection channel mentioned above. Multiple first punching sheets 11 have the same structure and only need to be rotated by a predetermined angle in the circumferential direction, which can save the number of molds for forming punching sheets and reduce design costs. In the embodiment provided in the present disclosure, a blank area can be set between the three injection hole groups. When multiple first punches 11 are stacked, the second injection hole group 112 of the first punch of the sub-outer layer corresponds to the position of the first injection hole group 111 of the first punch of the outermost layer, and corresponds to the position of the first injection hole group 111 on the right side of the first punch 11 located on the inner side of the sub-outer layer. This can be achieved by adjusting the rotation angle between the multiple first punches 11.

[0053] In the embodiment provided by the present disclosure, the two first oil injection holes 1110 in the first oil injection hole group 111 are respectively located on both sides of the radial direction of the stator core 1, and the distance between the inner ends of the two first oil injection holes 1110 is smaller than the distance between the outer ends; the two second oil injection holes 1120 in the second oil injection hole group 112 are respectively located on both sides of the radial direction of the stator core 1, and the distance between the inner ends of the two second oil injection holes 1120 is larger than the distance between the outer ends. Specifically, the distance between the two first oil injection holes 1110 and the distance between the two second oil injection holes 1120 can be adjusted and designed as needed.

[0054] In another exemplary embodiment of the present disclosure, Figures 10 to 14 As shown, the plurality of injection holes 110 are divided into a plurality of injection hole groups 1100 arranged at intervals along the circumferential direction, each injection hole group 1100 includes a plurality of injection holes 110 of different shapes, among the plurality of injection holes 110, the No. I injection hole 1111 and the No. II injection hole 1112 are arranged radially symmetrically with respect to the first punching plate 11, and / or the No. III injection hole 1113 itself is arranged radially symmetrically with respect to the first punching plate 11; the No. IV injection hole 1114 includes at least two single holes arranged radially symmetrically with respect to the first punching plate 11, and the injection holes 110 of different shapes of two adjacent first punching plates 11 are arranged crosswise. There is no limitation on the type and quantity of the injection holes 110 included in each injection hole group 1100, and the shapes of the plurality of injection holes 110 can be completely different or partially the same. The radially symmetrical arrangement ensures that when the positions of the oil injection holes 110 of different shapes correspond, they are at least partially connected, and the area of ​​the oil injection channel is constantly changing, achieving an effect of increasing pressure and spraying oil into the stator winding.

[0055] In an exemplary embodiment of the present disclosure, Fig.12 As shown, the No. I injection hole 1111 and the No. II injection hole 1112 can be Z-shaped holes, respectively, the No. III injection hole 1113 can be a cross hole, and the single hole can be a long hole, such as Fig.14As shown, in two adjacent first punching plates 11, the fuel injection hole 1113 of one is located between the fuel injection hole 1111 and the fuel injection hole 1112 of the other, and the overlapping area of ​​the two is the small square shown in the shaded part of the figure. The two single holes of the fuel injection hole 1114 of one intersect with the horizontal section of the fuel injection hole 1113 of the other, respectively, and the overlapping part of the two is the rectangular hole part on both sides of the cross hole, as shown in the shaded part of the figure, the area of ​​the connected part is reduced, the pressure is increased, and the fuel injection effect is improved. Here, the shape of the single hole in the fuel injection hole 1111, the fuel injection hole 1112, the fuel injection hole 1113 and the fuel injection hole 1114 is not limited, and can be any suitable shape such as a round hole, a square hole, a special-shaped hole, etc. The cross-section of the overlapping part can be understood as the shape of the flow area of ​​the fuel injection channel is not limited, and the shape design that can reduce the flow area of ​​the fuel injection channel belongs to the protection scope of the present disclosure.

[0056] There are many design methods for the source of the cooling medium in the oil injection hole. In an exemplary embodiment of the present disclosure, Figure 1 As shown, the stator core 1 has an oil inlet cavity 100 located in the middle, an oil injection cavity 120 located at both ends, and a cooling channel 130 connecting the oil inlet cavity 100 and the oil injection cavity 120. The oil inlet cavity 100 and the oil injection cavity 120 can be arranged along the circumferential direction, respectively, the cooling channel 130 extends along the axial direction, and the oil injection hole 110 is connected to the oil injection cavity 120. Figure 2 and Figure 3 As shown, the cooling medium in the oil inlet chamber 100 enters the oil injection chamber 120 through the cooling channel 130, and is sprayed out from both ends through the oil injection holes 110. The oil inlet chamber 100 can be connected to the oil inlet hole on the housing of the motor, and the oil enters the middle, flows from the middle toward the two ends and is sprayed. The cooling medium can cover the entire periphery of the stator core, which can not only ensure the cooling of the stator core 1, but also realize the cooling of the stator windings at both ends. In the present disclosure, the oil inlet chamber 100 and the oil injection chamber 120 can be grooves opened on the stator core 1 in between. Of course, the structure of the punching sheets that are stacked to form the stator core 1 can also be designed to form the above-mentioned oil inlet chamber 100, oil injection chamber 120 and cooling channel 130 structures respectively.

[0057] In an exemplary embodiment of the present disclosure, Figure 1 As shown, the stator core 1 has a plurality of second punching sheets 12 and third punching sheets 13 stacked and arranged in the axial direction, the axial diameter of the second punching sheet 12 is smaller than the axial diameter of the third punching sheet 13, and the plurality of second punching sheets 12 are stacked and arranged to form an oil inlet chamber 100 and an oil injection chamber 120 respectively. An opening 131 is provided on the third punching sheet 13, and the plurality of third punching sheets 13 are stacked and arranged and the opening 131 is at least partially connected to form a cooling channel 130.

[0058] In the middle of the stator core 1, multiple second punching sheets 12 are stacked and arranged, and an oil inlet cavity 100 connected to the oil inlet is formed between the motor housing. Multiple second punching sheets 12 are stacked and arranged at both ends of the stator core 1 and between the third punching sheet 13 and the first punching sheet 11 to form an oil injection cavity 120. Figure 6 As shown, the plurality of second punching sheets 12 forming the oil inlet cavity 100 constitute the first lamination group 121, and the plurality of second punching sheets 12 forming the oil injection cavity 120 constitute the second lamination group 122. The number of second punching sheets 12 in the first lamination group 121 can be greater than the number of second punching sheets 12 in the second lamination group 122, so that the axial width of the oil inlet cavity 100 is greater than the axial width of the oil injection cavity 120, and the oil inlet amount of the oil inlet cavity 100 can be increased to ensure that sufficient cooling medium can flow to both ends of the stator core 1. Figure 8 and Fig. 9 As shown, the opening 131 can be a square hole, a circular hole, etc. The shape and number of the openings 131 on the stacked multiple third punching sheets 13 can be the same or different. In the embodiment where the multiple third punching sheets 13 are designed to have the same structure, the openings 131 of two adjacent third punching sheets 13 can be arranged completely opposite to each other to form a straight-through cooling channel 130. Of course, the present disclosure also includes a preset angle between two adjacent third punching sheets 13, and the openings 131 are partially connected to form an inclined cooling channel 130. Here, the rotation angle between the two adjacent third punching sheets 13 can be equal to the angle between the two adjacent stator teeth of the stator core 1, which can slow down the flow speed of the cooling medium in the axial direction, better exchange heat with the stator core 1, and improve the heat dissipation effect of the stator core 1.

[0059] In the present disclosure, the axial diameter of the second punching sheet 12 is larger than the distance from the inner end of the oil injection hole 110 to the central axis of the stator core 1 and smaller than the distance from the outer end of the oil injection hole 110 to the central axis of the stator core 1. The second punching sheet 12 can block the unconnected portion of two adjacent first punching sheets 11, which will not affect the oil injection effect. At the same time, the size difference between the second punching sheet 12 and the first punching sheets 11 and the third punching sheets 13 on both sides will not be too large to affect the structural strength of the entire stator core 1.

[0060] In this disclosure, Figure 6 and Figure 7 As shown, the outer periphery of the second punching sheet 12 is provided with a plurality of protrusions 123 arranged at intervals in the circumferential direction, the positions of the protrusions 123 of two adjacent second punching sheets 12 correspond to each other, and the protrusions 123 are provided with a connecting flow channel 1230 extending in the axial direction. At the position of the oil inlet cavity 100, the plurality of protrusions 123 can enhance the structural strength of the oil inlet cavity 100, and at the same time, part of the cooling medium in the oil inlet cavity 100 can pass through the connecting flow channel 1230 to the cooling flow channel 130, which will not affect the flow of the cooling medium in the oil inlet cavity 100.

[0061] According to a second aspect of the present disclosure, a motor is provided, comprising the stator core 1 described above. The motor has all the beneficial effects of the stator core 1 described above, and no further elaboration is given here.

[0062] According to a third aspect of the present disclosure, a vehicle is provided, including the motor provided by the present disclosure. The vehicle has all the beneficial effects of the above-mentioned stator core 1 and motor, which will not be described in detail here.

[0063] In addition, the word "exemplary" is used herein to indicate serving as an example, instance, or diagram. Any aspect or design described as "exemplary" in this article is not necessarily understood to be advantageous compared to other aspects or designs. On the contrary, the use of the word exemplary is intended to present concepts in a specific way. As used herein, the term "or" is intended to represent an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to represent any one of the natural inclusive arrangements. That is, if X applies A; X applies B; or X applies both A and B, "X applies A or B" is satisfied under any of the aforementioned examples. In addition, unless otherwise specified or clearly pointed to a singular form from the context, the articles "one" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0064] Likewise, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art after reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if the structure is not equivalent to the disclosed structure. In addition, although specific features of the present disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and beneficial to any given or specific application. In addition, with respect to "including", "having", "having", "having", or variations thereof used in a specific embodiment or claim, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0065] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0066] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0067] In the above detailed description, reference is made to the accompanying drawings, which illustrate specific aspects of the present disclosure that can be practiced by way of illustration. In this regard, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating directions or representing positional relationships, can be used with reference to the orientation of the described figures. Since the components of the described device can be positioned in a plurality of different orientations, directional terms can be used for illustrative purposes rather than restrictive. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concepts of the present disclosure. Therefore, the following detailed description should not be considered in a limiting sense.

[0068] It should be understood that, unless otherwise specifically noted, the features of some embodiments of the various present disclosures described herein may be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more; similarly, "at least one of . . . " includes any one of the related listed items and any combination of any two or more.

[0069] It should be understood that, unless otherwise clearly specified and limited, the terms "joining", "attaching", "installing", "connecting", "connecting", "fixing" and the like used in the embodiments of the present disclosure should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; 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, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0070] In addition, the term "above" used in relation to a component, element or material layer formed "above" or located "above" a surface may be used herein to indicate that the component, element or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements or layers are arranged between the surface and the component, element or material layer. However, the term "above" used in relation to a component, element or material layer formed "above" or located "above" a surface may also optionally have a specific meaning: the component, element or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, such as in direct contact with the surface.

[0071] Although terms such as "first", "second" and "third" can be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, component, region, layer or section from another component, component, region, layer or section. Therefore, without departing from the teachings of each example, the first component, component, region, layer or section mentioned in the examples described herein may also be referred to as the second component, component, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may expressly or implicitly include at least one of the features. In the description herein, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] It should be understood that spatially relative terms such as "above", "upper", "below", and "lower" are used herein to describe the relationship of one element to another element shown in the figures. In addition to the orientation depicted in the drawings, such spatially relative terms are also intended to include different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the element described as being "above" or "upper" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" includes both upper and lower orientations. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

Claims

1. A stator core, characterized in that: The two ends of the stator core are respectively formed by laminating a plurality of first punching sheets stacked in the axial direction, the first punching sheets are provided with oil injection holes, the oil injection holes of the plurality of first punching sheets overlap and form an oil injection channel, wherein the projections of at least part of the oil injection holes of any two adjacent first punching sheets in the axial direction of the stator core are arranged at an angle to each other; The oil injection holes are arranged in a plurality at intervals along the circumferential direction, and the distances between the centers of the plurality of oil injection holes and the central axis of the stator core are equal; The stator core has an oil spray chamber located at both ends, and the oil spray chamber is connected to the oil spray hole; The plurality of the fuel injection holes are divided into a plurality of fuel injection hole groups, and in any two adjacent first punching sheets, the fuel injection holes in one fuel injection hole group and the fuel injection holes in the other fuel injection hole group are at least partially arranged crosswise; The plurality of fuel injection hole groups are divided into a first fuel injection hole group and a second fuel injection hole group which are alternately arranged along the circumferential direction, each of the fuel injection hole groups includes at least two fuel injection holes which are angled to each other, the two first fuel injection holes in the first fuel injection hole group are angled to each other, the two second fuel injection holes in the second fuel injection hole group are angled to each other, one of the first angle and the second angle has an opening facing outward, and the other has an opening facing inward, and the first fuel injection holes and the second fuel injection holes are arranged crosswise.

2. The stator core according to claim 1, characterized in that: The oil injection holes are arranged obliquely relative to the radial direction of the first punching sheet, and the oil injection holes of two adjacent first punching sheets have different inclination directions.

3. The stator core according to claim 1, characterized in that: The oil injection holes are arranged with their major axes radially in the form of long strip holes, the two first oil injection holes in the first oil injection hole group are respectively located on both sides of the stator core in the radial direction, and the distance between the inner ends of the two first oil injection holes is smaller than the distance between the outer ends; The two second oil injection holes in the second oil injection hole group are respectively located on both sides of the stator core in the radial direction, and the distance between the inner ends of the two second oil injection holes is greater than the distance between the outer ends.

4. A stator core, characterized in that: The two ends of the stator core are respectively formed by laminating a plurality of first punching sheets stacked in the axial direction, the first punching sheets are provided with oil injection holes, the oil injection holes of the plurality of first punching sheets overlap and form an oil injection channel, wherein the projections of at least part of the oil injection holes of any two adjacent first punching sheets in the axial direction of the stator core are arranged at an angle to each other; The oil injection holes are arranged in a plurality at intervals along the circumferential direction, and the distances between the centers of the plurality of oil injection holes and the central axis of the stator core are equal; The stator core has an oil spray chamber located at both ends, and the oil spray chamber is connected to the oil spray hole; The plurality of injection holes are divided into a plurality of injection hole groups arranged at intervals along the circumferential direction, each of the injection hole groups includes a plurality of injection holes of different shapes, and among the plurality of injection holes, The No. I injection hole and the No. II injection hole are arranged symmetrically with respect to the radial direction of the first punching plate, and / or, The fuel injection hole No. III is arranged symmetrically with respect to the radial direction of the first punching plate; The IV injection hole includes at least two single holes arranged radially symmetrically with respect to the first punching plate. The oil injection holes of different shapes of two adjacent first punching plates are cross-arranged.

5. The stator core according to claim 4, characterized in that: The fuel injection hole No. I and the fuel injection hole No. II are respectively Z-shaped holes, the fuel injection hole No. III is a cross hole, and the single hole is a long hole. In two adjacent first punching sheets, the fuel injection hole No. III of one is located between the fuel injection hole No. I and the fuel injection hole No. II of the other, and the two single holes of the fuel injection hole No. IV of one intersect with the horizontal section of the fuel injection hole No. III of the other.

6. The stator core according to claim 1 or 4, characterized in that: The distances between the outer ends of the plurality of oil injection holes and the central axis of the stator core are equal; and / or, The distances between the inner ends of the plurality of oil injection holes and the central axis of the stator core are equal. Wherein, at least some of the oil injection holes of any two adjacent first punching sheets partially overlap, so that the flow area of ​​the oil injection channel is reduced.

7. The stator core according to claim 1 or 4, characterized in that: The stator core has an oil inlet cavity located in the middle and a cooling channel connecting the oil inlet cavity and the oil injection cavity. The cooling medium in the oil inlet cavity enters the oil injection cavity through the cooling channel and is sprayed out from both ends through the oil injection holes.

8. The stator core according to claim 7, characterized in that: The stator core comprises a plurality of second punching sheets and a third punching sheet stacked and arranged in the axial direction, the axial diameter of the second punching sheet is smaller than the axial diameter of the third punching sheet, a plurality of the second punching sheets are stacked and arranged to form the oil inlet chamber and the oil injection chamber respectively, an opening is provided on the third punching sheet, a plurality of the third punching sheets are stacked and arranged and the opening is at least partially connected to form the cooling channel.

9. The stator core according to claim 8, characterized in that: Two adjacent third punching sheets are rotated at a preset angle, and the opening portions are connected to form the inclined cooling channel.

10. The stator core according to claim 8, characterized in that: The axial diameter of the second punching sheet is larger than the distance from the inner end of the oil injection hole to the central axis of the stator core and smaller than the distance from the outer end of the oil injection hole to the central axis of the stator core.

11. The stator core according to claim 8, characterized in that: The outer periphery of the second punching sheet is provided with a plurality of protrusions arranged at intervals in the circumferential direction, and the protrusions are provided with connecting flow channels extending in the axial direction.

12. The stator core according to claim 7, characterized in that: The axial width of the oil inlet chamber is greater than the axial width of the oil injection chambers on both sides.

13. A motor, characterized in that: The invention comprises the stator core according to any one of claims 1 to 12.

14. A vehicle, characterized in that: Including the motor as claimed in claim 13.

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