Stator core, stator assembly and motor

Abstract

The utility model discloses a stator core, a stator assembly and a motor, and relates to the technical field of motor parts, the stator core comprises a first splicing member and a plurality of second splicing members; the first splicing piece is annular; the plurality of second splicing pieces are arranged on the inner sides of the first splicing pieces; wherein the first splicing piece is a first yoke part, the second splicing piece comprises a second yoke part and stator tooth parts, and a stator slot is formed between the opposite stator tooth parts; the first yoke part and the plurality of second yoke parts form a stator yoke part; the plurality of second splicing pieces are spliced along the circumferential direction of the first splicing piece, and the circumferential movement of the second yoke part relative to the first yoke part is limited through a limiting structure; and the stator tooth parts of the adjacent second splicing pieces are matched to limit the relative radial movement of the second splicing pieces. According to the technical scheme provided by the utility model, the risk of stress deformation of the stator core can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor components, and particularly relates to a stator core, a stator assembly and a motor. Background Art

[0002] The stator assembly of a motor is formed by winding windings around a stator core.

[0003] In the related art, a design of separating the stator yoke from the stator teeth is usually adopted to form the stator core by means of mutual splicing. When the stator teeth are subjected to an inward radial force, the stator teeth tend to move closer to the center and deform. When the stator teeth are subjected to a tangential force, the stator teeth tend to slide in the circumferential direction of the stator yoke and deform. Summary of the Utility Model

[0004] The main object of the utility model is to propose a stator core, a stator assembly and a motor, aiming at reducing the risk of deformation of the stator core under force.

[0005] To achieve the above object, a stator core proposed by the utility model includes:

[0006] A first splicing piece, the first splicing piece being annular;

[0007] A plurality of second splicing pieces, arranged inside the first splicing piece;

[0008] Wherein, the first splicing piece is a first yoke portion, the second splicing piece includes a second yoke portion and stator teeth, and a stator slot is formed between adjacent stator teeth;

[0009] The first yoke portion and the plurality of second yoke portions constitute a stator yoke;

[0010] The plurality of second yoke portions are spliced along the circumferential direction of the first yoke portion, and the second yoke portion is restricted from circumferential movement relative to the first yoke portion by a limiting structure;

[0011] The stator teeth of adjacent second splicing pieces cooperate to restrict the relative radial movement of the second splicing pieces.

[0012] In an embodiment, the connection surface between the first splicing piece and the second splicing piece is a plane structure, the plane structure is the limiting structure, and the connection surfaces of adjacent two second splicing pieces and the first splicing piece intersect.

[0013] In an embodiment, the symmetry line of the stator slot passes through the intersection point of the connection surfaces and is collinear.

[0014] In an embodiment, the second splicing piece includes two stator teeth, and the two stator teeth and the second yoke portion enclose to form the stator slot.

[0015] In one embodiment, among two adjacent second splicing pieces, two stator tooth portions close to each other abut against each other.

[0016] In one embodiment, a core coolant channel is formed at the junction of the first yoke portion and the second yoke portion.

[0017] In one embodiment, the core coolant channel is formed by enclosing between two adjacent second yoke portions and the first yoke portion.

[0018] In one embodiment, inclined surfaces are provided on both sides of the second yoke portion, and the core coolant channel is formed by enclosing between the inclined surfaces on two adjacent second yoke portions and the inner side surface of the first yoke portion.

[0019] The present utility model further provides a stator assembly, including:

[0020] The stator core as described above;

[0021] A rotor core, with the stator core sleeved on the periphery of the rotor core;

[0022] A winding, which includes three parts: a first side, an intermediate section, and a second side. Among them, the intermediate section is located in the stator slot.

[0023] In one embodiment, an insulating material is provided between the winding and the stator slot; a coolant channel in the slot is formed between the intermediate section and the insulating material.

[0024] In one embodiment, a first sealing ring is provided on the first side. The first sealing ring is provided with an oil inlet. The first sealing ring is sleeved on the outside of the first side and is hermetically connected to the end of the stator core, and isolates the first side from the rotor core.

[0025] In one embodiment, a core coolant channel is formed at the junction of the first yoke portion and the second yoke portion, and the first sealing ring communicates the coolant channel in the slot and the core coolant channel.

[0026] In one embodiment, a second sealing ring is provided on the second side. The second sealing ring is provided with an oil outlet. The second sealing ring is sleeved on the outside of the second side and is hermetically connected to the end of the stator core, and isolates the second side from the rotor core.

[0027] In one embodiment, a core coolant channel is formed at the junction of the first yoke portion and the second yoke portion. The middle part of the stator core has a radial oil inlet channel, and the oil inlet channel is arranged in parallel with the coolant channel in the slot and the core coolant channel.

[0028] The present utility model also provides a motor, which includes the stator assembly as described above.

[0029] In the technical solution of the present utility model, a first splicing part and a plurality of second splicing parts are spliced with each other to form a stator core. Among them, the first splicing part is a first yoke part, and the second splicing part includes a second yoke part and a stator tooth part. The first yoke part and a plurality of second yoke parts can form a stator yoke part. That is to say, the first yoke part and the second yoke part of the stator yoke part are designed to be separated. The plurality of second yoke parts can be spliced along the circumferential direction of the first yoke part to form an annular structure, and the second yoke part is restricted from circumferential movement relative to the second yoke part through a limiting structure. Moreover, the stator tooth parts of adjacent second splicing parts cooperate with each other to restrict the relative radial movement of the second splicing parts.

[0030] When the stator tooth part is subjected to an inward radial force, the stator tooth parts of two adjacent second splicing parts can restrict each other's movement in the radial direction through mutual cooperation, which can effectively offset the inward electromagnetic force; when the stator tooth part is subjected to an outward radial force, since the first splicing part is annular, it can protect the second splicing part to offset the outward electromagnetic force; when the stator tooth part is subjected to a tangential force, it can effectively restrict the circumferential movement of the second yoke part relative to the first yoke part under the action of the limiting structure. Therefore, whether the stator tooth part is subjected to a radial force or a tangential force, it can be well protected, thereby effectively reducing the risk of the stator core deforming due to force. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0032] Figure 1 It is a partial structural schematic diagram during the splicing process of an embodiment of the stator core provided by the present utility model;

[0033] Figure 2 It is a partial structural schematic diagram during the splicing process of another embodiment of the stator core provided by the present utility model;

[0034] Figure 3 It is a structural schematic diagram of an embodiment of the stator assembly provided by the present utility model;

[0035] Figure 4 For Figure 3 the cross-sectional view taken along line A-A in

[0036] Figure 5 For Figure 4Partial enlarged view at A' in the [Chinese context];

[0037] Figure 6 Cross-sectional view of an embodiment of the stator assembly provided by the present utility model;

[0038] Figure 7 Cross-sectional view of another embodiment of the stator assembly provided by the present utility model;

[0039] Figure 8 Cross-sectional view of yet another embodiment of the stator assembly provided by the present utility model.

[0040] Explanation of the reference numerals in the attached drawings:

[0041] 1000, stator assembly; 100, stator core; 10, first splicing member; a, first yoke portion; 11, planar structure; 20, second splicing member; 21, second yoke portion; 211, inclined surface; 22, stator tooth portion; 30, stator slot; 40, core coolant channel; 50, in-slot coolant channel; 200, winding; 210, first side; 220, intermediate section; 230, second side; 31a, first sealing ring; 31b, second sealing ring; 320, oil inlet; 330, oil outlet; 340, oil inlet channel.

[0042] The realization of the object, functional features and advantages of the present utility model will be further described in conjunction with the embodiments with reference to the attached drawings. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0044] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0046] The stator assembly of the motor is formed by winding windings around a stator core.

[0047] In the related art, a design of separating the stator yoke from the stator teeth is usually adopted to form the stator core by means of splicing. When the stator teeth are subjected to an inward radial force, the stator teeth tend to move closer to the center and deform, and when the stator teeth are subjected to a tangential force, the stator teeth tend to slide circumferentially on the stator yoke and deform.

[0048] Based on the above problems, the present utility model proposes a stator core aimed at reducing the risk of deformation of the stator core under force.

[0049] Please refer to Figure 1 、 Figure 2 In an embodiment of the present utility model, the stator core 100 includes a first splicing member 10 and a plurality of second splicing members 20; the first splicing member 10 is annular; the plurality of second splicing members 20 are disposed inside the first splicing member 10; wherein, the first splicing member 10 is a first yoke portion a, the second splicing member 20 includes a second yoke portion 21 and stator teeth 22, and a stator slot 30 is formed between the opposite stator teeth 22; the first yoke portion a and the plurality of second yoke portions 21 constitute the stator yoke; the plurality of second yoke portions 21 are spliced along the circumference of the first yoke portion a, and the second yoke portion 21 is restricted from circumferential movement relative to the first yoke portion a by a limiting structure; the stator teeth 22 of adjacent second splicing members 20 cooperate to restrict the relative radial movement of the second splicing members 20.

[0050] The technical solution of the present utility model is to splice the first splicing member 10 and a plurality of second splicing members 20 with each other to form a stator core 100. Among them, the first splicing member 10 is the first yoke portion a, and the second splicing member 20 includes a second yoke portion 21 and a stator tooth portion 22. The first yoke portion a and a plurality of second yoke portions 21 can form a stator yoke portion. That is to say, the first yoke portion a and the second yoke portion 21 of the stator yoke portion are designed separately. The plurality of second yoke portions 21 can be spliced along the circumferential direction of the first yoke portion a into an annular structure, and the second yoke portion 21 is restricted from circumferential movement relative to the second yoke portion 21 through a limiting structure. Moreover, the stator tooth portions 22 of adjacent second splicing members 20 cooperate with each other to restrict the relative radial movement of the second splicing member 20.

[0051] When the stator tooth portion 22 is subjected to an inward radial force, the stator tooth portions 22 of two adjacent second splicing members 20 can restrict each other's movement in the radial direction through mutual cooperation, and can effectively counteract the inward electromagnetic force. When the stator tooth portion 22 is subjected to an outward radial force, since the first splicing member 10 is annular, it can protect the second splicing member 20 to counteract the outward electromagnetic force. When the stator tooth portion 22 is subjected to a tangential force, it can effectively restrict the circumferential movement of the second yoke portion 21 relative to the first yoke portion a under the action of the limiting structure. Therefore, whether the stator tooth portion 22 is subjected to a radial force or a tangential force, it can be well protected, thereby effectively reducing the risk of deformation of the stator core 100 due to force.

[0052] It should be noted that when the stator tooth portion 22 is subjected to an inward radial force, due to the cooperation of the stator tooth portions 22 of adjacent second splicing members 20, that is, the stator tooth portions 22 of two adjacent second splicing members 20 are in contact with each other to form a mutually extruded effect, thereby being able to prevent the second splicing member 20 from approaching the center, so as to prevent the stator tooth portion 22 from approaching the center, and the inward electromagnetic force can be effectively counteracted.

[0053] As some examples, in the two mutually cooperating stator tooth portions 22, a tooth-to-tooth cooperation structure can be provided at the cooperation portion between the two stator tooth portions 22 to effectively restrict the relative radial movement of the second splicing member 20.

[0054] In the actual application process, each second splicing member 20 can include one second yoke portion 21 and at least one stator tooth portion 22. For example, it can include one, two, three or more stator tooth portions 22.

[0055] In the actual application process, the limiting structure can be a structure in which a protrusion cooperates with a groove, or a structure of planar limitation, as long as the second yoke portion 21 can be restricted from circumferential movement relative to the first yoke portion a through the limiting structure.

[0056] Please refer to Figure 1 、 Figure 2, in an embodiment of the present utility model, the connection surface between the first splicing member 10 and the second splicing member 20 is a planar structure 11, and the planar structure 11 is a limiting structure, and the connection surfaces of two adjacent second splicing members 20 and the first splicing member 10 intersect.

[0057] With such a setting, by setting the connection surface between the first splicing member 10 and the second splicing member 20 as the planar structure 11, so that a plurality of planar structures 11 can enclose to form a structure with a polygonal cross-sectional shape. In this way, by arranging the second yoke portion 21 on the planar structure 11, when the stator tooth portion 22 is subjected to a tangential force, each second yoke portion 21 can be circumferentially limited by the planar structures 11 on both sides thereof, and thus the circumferential movement of the second yoke portion 21 relative to the first yoke portion a can be effectively restricted. Therefore, there is no need to provide an additional structure to restrict the circumferential movement of the second yoke portion 21 relative to the first yoke portion a, making the structure simpler.

[0058] Please refer to Figure 1 , Figure 2 , in an embodiment of the present utility model, the symmetry line of the stator slot 30 passes through the intersection point of the connection surfaces.

[0059] With such a setting, each second yoke portion 21 can be better circumferentially limited by the planar structures 11 on both sides thereof, so as to improve the effect of restricting the circumferential movement of the second yoke portion 21 relative to the first yoke portion a. At the same time, each second splicing member 20 can be a structure with the same shape and size, which can play an anti-fooling role during the splicing process.

[0060] It should be noted that the symmetry line of the stator slot 30 passes through the splicing seam between the stator tooth portions 22 of two adjacent second splicing members 20. The intersection point of the connection surfaces refers to the intersection point between two adjacent planar structures 11.

[0061] Please refer to Figure 1 , Figure 2 , in an embodiment of the present utility model, the second splicing member 20 includes two stator tooth portions 22, and the two stator tooth portions 22 and the second yoke portion 21 enclose to form a stator slot 30.

[0062] With such a setting, the stator core 100 can be separated into second splicing members 20 each including one second yoke portion 21 and two stator tooth portions 22, so as to avoid the length of the second yoke portion 21 of the separated second splicing member 20 being too long or too short; when the second splicing member 20 includes three or more stator tooth portions 22, the length of the second yoke portion 21 will be relatively long, and when subjected to an inward radial force, the adjacent two second yoke portions 21 will be squeezed against each other, causing the second yoke portion 21 to deform; while when the second splicing member 20 includes one stator tooth portion 22, the length of the second yoke portion 21 will be relatively short, and then the stator core 100 needs to be separated into a relatively large number of second splicing members 20, resulting in a long splicing time.

[0063] Please refer to Figure 1 、 Figure 2 In an embodiment of the present utility model, among two adjacent second splicing members 20, two stator tooth portions 22 close to each other are in abutment with each other.

[0064] With such a setting, when an inward radial force is applied, the second splicing member 20 can be respectively pressed against the stator tooth portions 22 of the second splicing members 20 on both sides through the two stator tooth portions 22, which can increase the area of mutual extrusion between two adjacent second splicing members 20 and can better counteract the inward electromagnetic force.

[0065] Please refer to Figure 2 In an embodiment of the present utility model, a core coolant channel 40 is formed at the junction of the first yoke portion a and the second yoke portion 21.

[0066] With such a setting, the core coolant channel 40 can be arranged close to the stator tooth portion 22 and the stator slot 30. When the cooling medium flows through the core coolant channel 40, it can effectively carry away the heat of the stator yoke portion, the stator tooth portion 22 and the winding 200 in the stator slot 30, so as to improve the cooling effect.

[0067] In the actual application process, the core coolant channel 40 can be formed at the junction of the middle part of the second yoke portion 21 and the first yoke portion a, or can be formed between two adjacent second yoke portions 21 and the first yoke portion a.

[0068] Please refer to Figure 2 In an embodiment of the present utility model, a core coolant channel 40 is formed by enclosing between two adjacent second yoke portions 21 and the first yoke portion a.

[0069] With such a setting, by forming the core coolant channel 40 between two adjacent second yoke portions 21 and the first yoke portion a, the core coolant channel 40 can be arranged closer to the stator tooth portion 22 and the stator slot 30. When the cooling medium flows through the core coolant channel 40, it can better carry away the heat of the stator yoke portion, the stator tooth portion 22 and the winding 200 in the stator slot 30, so as to further improve the cooling effect.

[0070] In addition, since the junction is the main channel of the stator magnetic circuit, the oil hole cannot be set too large, otherwise it will increase the magnetic resistance of the stator magnetic circuit and reduce the motor torque output. Therefore, the oil hole at the junction needs to be smaller. However, small oil hole stamping is not friendly to the die life. In order to avoid small oil hole stamping, in this solution, a core coolant channel 40 is formed by enclosing between two adjacent second yoke portions 21 and the first yoke portion a to be used as a small oil hole, so that there is no need to form a small oil hole by stamping.

[0071] In the actual application process, structures such as inclined surfaces 211 and slotted openings can be provided on at least one side of the second yoke 21. After splicing, a core coolant channel 40 can be formed between two adjacent second yokes 21 and the first yoke a.

[0072] Please refer to Figure 2 , in an embodiment of the present utility model, inclined surfaces 211 are provided on both sides of the second yoke 21. The inclined surfaces 211 on two adjacent second yokes 21 and the inner side surface of the first yoke a enclose to form a core coolant channel 40.

[0073] With such a setting, the inclined surfaces 211 are directly provided on both sides of the second yoke 21. After splicing, the inclined surfaces 211 on two adjacent second yokes 21 and the inner side surface of the first yoke a can enclose to form a core coolant channel 40. When the cooling medium flows through the core coolant channel 40, the setting of the inclined surfaces 211 can increase the heat conduction contact area between the cooling medium and the stator yoke, so as to improve the cooling effect.

[0074] Please refer to Figures 3 to 8 , the present utility model further proposes a stator assembly 1000. The stator assembly 1000 includes a winding 200, a rotor core, and a stator core 100. The specific structure of the stator core 100 refers to the above embodiment. Since this stator assembly 1000 adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. Among them, the stator core 100 is sleeved outside the rotor core; the winding 200 includes three parts: a first side 210, an intermediate section 220, and a second side 230. Among them, the intermediate section 220 is located in the stator slot 30.

[0075] In this embodiment, the intermediate section 220 of the winding 200 is wound in the stator slot 30 of the stator core 100.

[0076] It should be noted that the first side 210 of the winding 200 is the part extending to one end of the stator core 100, and the second side 230 of the winding 200 is the part extending to the other end of the stator core 100. Among them, the second side 230 is the welding side, and its outer diameter is larger than that of the first side 210.

[0077] Please refer to Figure 5 , in an embodiment of the present utility model, an insulating material (not shown in the figure) is provided between the winding 200 and the stator slot 30; a coolant channel 50 in the slot is formed between the intermediate section 220 and the insulating material.

[0078] With such a setting, when the cooling medium flows through the coolant channel 50 in the groove, it can directly contact the stator tooth portion 22 and the middle section 220 of the winding 200 in the stator slot 30, and can directly cool the stator tooth portion 22 and the middle section 220 of the winding 200 to improve the cooling effect.

[0079] In the actual application process, the first splicing piece 10 and the second splicing piece 20 can be spliced into the stator core 100 first, and then the middle section 220 of the winding 200 is wound in the stator slot 30; or, the middle section 220 of the winding 200 can be wound in the stator slot 30 of the second splicing piece 20 first, and then the first splicing piece 10 and the second splicing piece 20 are spliced.

[0080] It should be noted that the insulating material can be an insulator or an insulating injection molding material, as long as it can block the conduction between the stator tooth portion 22 and the middle section 220.

[0081] Please refer to Figure 6 and Figure 7 , in an embodiment of the present utility model, a first sealing ring 31a is provided on the first side 210. The first sealing ring 31a is provided with an oil inlet 320. The first sealing ring 31a is sleeved outside the first side 210 and is hermetically connected to the end of the stator core 10, and isolates the first side 210 from the rotor core.

[0082] With such a setting, when the cooling medium enters the first sealing ring 31a from the oil inlet 320, it can fully cool the first side 210 located in the first sealing ring 31a by means of immersion.

[0083] Please refer to Figure 6 , in an embodiment of the present utility model, a core coolant channel 40 is formed at the junction of the first yoke portion a and the second yoke portion 21. The first sealing ring 31a communicates with the coolant channel 50 in the groove and the core coolant channel 40.

[0084] With such a setting, when the cooling medium enters the first sealing ring 31a from the oil inlet 320, it can fully cool the first side 210 located in the first sealing ring 31a by means of immersion. The cooling medium then flows through the coolant channel 50 in the groove and the core coolant channel 40 to fully take away the heat of the stator core 100 and the middle section 220 of the winding 200.

[0085] Please refer to Figure 6 , in an embodiment of the present utility model, a second sealing ring 31b is provided on the second side 230. The second sealing ring 31b is provided with an oil outlet 330. The second sealing ring 31b is sleeved outside the second side 230 and is hermetically connected to the end of the stator core 10, and isolates the second side 230 from the rotor core.

[0086] With such a setting, after the cooling medium flows out from the coolant channels 50 in the groove and the core coolant channels 40, it can flow towards the second sealing ring 31b to cool the second side 230 located within the second sealing ring 31b, and the cooled coolant finally discharges outward from the oil outlet 330.

[0087] Please refer to Figure 7 , in another embodiment of the present utility model, the use of the second sealing ring 31b can be cancelled, and after the cooling medium flows out from the coolant channels 50 in the groove and the core coolant channels 40, it can also be directly sprayed onto the second side 230 to perform spray cooling on the second side 230.

[0088] Please refer to Figure 8 , in yet another embodiment of the present utility model, a core coolant channel 40 is formed at the junction of the first yoke portion a and the second yoke portion 21, and a radial oil inlet channel 340 is provided in the middle of the stator core 10. The oil inlet channel 340 is arranged in parallel with the coolant channels 50 in the groove and the core coolant channel 40.

[0089] With such a setting, when the cooling medium enters the coolant channels 50 in the groove and the core coolant channels 40 from the oil inlet channel 340, it can flow towards both ends of the coolant channels 50 in the groove and the core coolant channels 40 to fully take away the heat of the stator core 100 and the winding 200. Among them, after the cooling medium flows towards one end of the coolant channels 50 in the groove and the core coolant channels 40, it sprays towards one end of the winding 200 to cool one end of the winding 200 by means of spraying, while after the cooling medium flows towards the other end of the coolant channels 50 in the groove and the core coolant channels 40, it sprays towards the other end of the winding 200, and also cools the other end of the winding 200 by means of spraying. In this way, sufficient cooling of the stator assembly 1000 can also be achieved.

[0090] In addition, by arranging the oil inlet channel 340 in parallel with the coolant channels 50 in the groove and the core coolant channel 40, the cooling medium can enter the coolant channels 50 in the groove and the core coolant channel 40 simultaneously, which can improve the cooling efficiency and cooling effect.

[0091] In the actual application process, the oil inlet channel 340 can be arranged in the middle of the stator core 100, or can be arranged at a position of the stator core 100 close to one of its ends.

[0092] As some examples, the oil inlet channel 340 can be arranged on at least one of the stator iron sheets of the stator core 10.

[0093] Of course, in other embodiments, the coolant channels 50 in the groove and the core coolant channel 40 can also be arranged in series.

[0094] The present utility model further provides a motor, which includes a stator assembly 1000. The specific structure of the stator assembly 1000 refers to the above embodiments. Since this motor adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0095] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A stator core, characterized in that: include: A first splicing piece, wherein the first splicing piece is ring-shaped; A plurality of second assembling pieces, arranged on the inner side of the first assembling piece; Wherein, the first splicing piece is a first yoke, the second splicing piece includes a second yoke and a stator tooth, and a stator slot is formed between the opposite stator teeth; The first yoke part and the plurality of the second yoke parts constitute a stator yoke part; A plurality of the second yoke parts are spliced ​​along the circumferential direction of the first yoke part, and the second yoke part is limited in circumferential movement relative to the first yoke part by a limiting structure; The stator teeth of adjacent second splicing pieces cooperate with each other to limit the relative radial movement of the second splicing pieces.

2. The stator core according to claim 1, characterized in that: The connection surface between the first assembling piece and the second assembling piece is a plane structure, the plane structure is the limiting structure, and the connection surfaces between two adjacent second assembling pieces and the first assembling piece intersect.

3. The stator core according to claim 2, characterized in that: The symmetry line of the stator slot passes through the intersection point of the connection surfaces.

4. The stator core according to any one of claims 1 to 3, characterized in that: The second splicing piece includes two stator teeth, and the two stator teeth and the second yoke are combined to form the stator slot.

5. The stator core according to claim 4, characterized in that: In two adjacent second splicing pieces, two stator teeth portions close to each other abut against each other.

6. The stator core according to any one of claims 1 to 3, characterized in that: An iron core coolant channel is formed at the junction of the first yoke and the second yoke.

7. The stator core according to claim 6, characterized in that: The core coolant channel is formed between two adjacent second yokes and the first yoke.

8. The stator core according to claim 7, characterized in that: Both sides of the second yoke are provided with inclined surfaces, and the inclined surfaces on two adjacent second yokes and the inner side surface of the first yoke are combined to form the core coolant channel.

9. A stator assembly, characterized in that: include: The stator core according to any one of claims 1 to 8; A rotor core, wherein the stator core is sleeved on the outer periphery of the rotor core; The winding comprises three parts: a first side, a middle section and a second side, wherein the middle section is located in the stator slot.

10. The stator assembly according to claim 9, characterized in that An insulating material is provided between the winding and the stator slot; and an in-slot cooling liquid channel is formed between the middle section and the insulating material.

11. The stator assembly according to claim 10, characterized in that A first sealing ring is provided on the first side. The first sealing ring is provided with an oil inlet. The first sealing ring is sleeved outside the first side and is sealed and connected to the end of the stator core, and isolates the first side from the rotor core.

12. The stator assembly according to claim 11, characterized in that An iron core coolant channel is formed at the junction of the first yoke and the second yoke, and the first sealing ring communicates the coolant channel in the groove with the iron core coolant channel.

13. The stator assembly according to any one of claims 11 to 12, characterized in that: A second sealing ring is provided on the second side. The second sealing ring is provided with an oil outlet. The second sealing ring is sleeved outside the second side and is sealed and connected to the end of the stator core, isolating the second side from the rotor core.

14. The stator assembly according to claim 10, characterized in that An iron core coolant channel is formed at the junction of the first yoke and the second yoke. A radial oil inlet channel is provided in the middle of the stator iron core. The oil inlet channel is arranged in parallel with the coolant channel in the slot and the iron core coolant channel.

15. A motor, characterized in that: Comprising a stator assembly as claimed in any one of claims 9 to 14.

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