Pole shoe, stator assembly, motor and vehicle

Abstract

The utility model discloses a pole shoe, a stator assembly, a motor and a vehicle, relates to the technical field of vehicles, and aims to solve the problem that the pole shoe is inconvenient to install. The pole shoe comprises a connecting part and a plurality of matching parts, the plurality of matching parts are arranged at intervals to form an annular shoe body, and the annular shoe body is used for being matched with stator teeth; and the plurality of matching parts are connected through the connecting parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a pole shoe, a stator assembly, a motor and a vehicle. BACKGROUND

[0002] With the development of science and technology and the improvement of environmental awareness, the performance of the motor is paid more and more attention.

[0003] The motor refers to an electromagnetic device that realizes electric energy conversion or transmission according to the electromagnetic induction law. Its main function is to generate driving torque as the power source of electric appliances or various machines. The pole shoe is arranged in the motor, which helps to improve the magnetic field distribution, thereby improving the performance of the motor.

[0004] In the prior art, the structure of the pole shoe is unstable, and the installation of the pole shoe with the motor stator is not convenient. Practical new type content

[0005] The purpose of the present application is to provide a pole shoe, a stator assembly, a motor and a vehicle, which aims to solve the problem of inconvenient installation of the pole shoe.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] In the first aspect, the present application provides a pole shoe, which can include a connecting portion and a plurality of cooperating portions. The plurality of cooperating portions are arranged at intervals to form a ring-shaped shoe body, and the ring-shaped shoe body is used to cooperate with the stator teeth. The plurality of cooperating portions are connected through the connecting portion.

[0008] The material of the pole shoe is a magnetic conductive material. By cooperating with the stator teeth, the magnetic field can be concentrated, so that the magnetic field can be uniformly distributed in the motor, thereby improving the stability of the motor. The plurality of cooperating portions are connected through the connecting portion, so that the plurality of cooperating portions are connected as a whole. In this way, when the ring-shaped shoe body cooperates with the stator teeth, the positioning is simpler and the installation is more convenient.

[0009] In some embodiments, the connecting portion can include a first connecting portion, and the first connecting portion is arranged on the outer circumferential side of the ring-shaped shoe body. The first connecting portion is connected with the plurality of cooperating portions.

[0010] In this way, the first connecting portion can connect the plurality of cooperating portions as a whole, which is convenient for installation. The first connecting portion is arranged on the outer circumferential side of the ring-shaped pole shoe, which can reduce the interference of the first connecting portion on the performance of the motor stator.

[0011] In some embodiments, the connecting portion can further include a second connecting portion, and the second connecting portion is arranged on the inner circumferential side of the ring-shaped shoe body. The plurality of cooperating portions are connected between the first connecting portion and the second connecting portion.

[0012] The second connecting portion is arranged on the inner circumferential side of the annular shoe body, and can reduce the interference of the second connecting portion on the performance of the motor stator. In addition, the first connecting portion and the second connecting portion can be used to connect the plurality of matching portions as a whole, so that the structure of the pole shoe is more stable.

[0013] In some embodiments, the plurality of matching portions extend in a direction in which the first connecting portion points to the second connecting portion. Since the matching portions are used to cooperate with the stator teeth to make the magnetic field distribution uniform, the matching portions extend in the direction in which the first connecting portion points to the second connecting portion, so that the first connecting portion and the second connecting portion can be in sufficient contact, thereby making the magnetic field on the stator uniformly distributed, and further improving the performance of the motor.

[0014] In some embodiments, the matching portion can include a first matching portion and a second matching portion adjacent to the first matching portion, a first gap is formed between the first matching portion and the second matching portion, and the first gap is used to accommodate the stator teeth; the distance between the first matching portion and the second matching portion gradually increases in a first direction, and the first direction is from the second connecting portion to the first connecting portion.

[0015] In this way, the first gap is used to accommodate the stator teeth, and the magnetic circuit of the stator teeth does not pass through the matching portion, so that the magnetic property of the matching portion does not interfere with the main magnetic field, and the performance of the motor is affected. The distance between the first matching portion and the second matching portion gradually increases in the first direction, so that the first matching portion and the second matching portion can cooperate with the stator teeth.

[0016] In some embodiments, the matching portion further includes a third matching portion, the second matching portion is arranged between the first matching portion and the third matching portion, and the distance between the third matching portion and the second matching portion gradually decreases in the first direction, or the third matching portion and the second matching portion are arranged in parallel.

[0017] Since the stator includes a plurality of stator teeth, the first matching portion and the second matching portion can be used to cooperate with two edges of one stator tooth, and the third matching portion can be used to cooperate with one edge of an adjacent stator tooth. If the gap between the adjacent edges of the adjacent stator teeth gradually increases in the first direction, the distance between the third matching portion and the second matching portion can gradually increase in the first direction. If the adjacent edges of the adjacent stator teeth are arranged in parallel, the third matching portion and the second matching portion are arranged in parallel.

[0018] In a second aspect, the application also provides a stator assembly, which can include the pole shoe described above.

[0019] In some embodiments, the stator assembly can further include a stator core, and the stator core includes a plurality of stator teeth arranged at intervals to form an annular tooth body, and the annular tooth body cooperates with the annular shoe body.

[0020] The plurality of stator teeth are arranged in a ring-shaped tooth body, which can keep the stator core uniform and stable during high-speed rotation, and is not prone to deformation or displacement. Meanwhile, the ring-shaped tooth body has a hollow region formed therein, which can increase the heat dissipation area of the stator core and improve the heat dissipation efficiency of the motor.

[0021] In some embodiments, the stator core can include a stator yoke connected between two adjacent stator teeth.

[0022] In this way, the stator core can be installed without assembling individual stator teeth, thereby ensuring uniform distribution of the stator teeth in the circumferential direction and improving the performance of the motor.

[0023] In some embodiments, the stator teeth can include a first stator tooth and a second stator tooth adjacent to the first stator tooth, and the stator yoke can include a first stator yoke disposed between the first stator tooth and the second stator tooth, and a first stator slot and a second stator slot can be formed between the first stator tooth and the second stator tooth, and the first stator slot, the first stator yoke, and the second stator slot can be arranged along the axial direction of the stator assembly.

[0024] In this way, windings can be arranged in the first stator slot and the second stator slot, thereby allowing the main magnetic flux of the motor to pass through the stator yoke, thereby reducing the iron loss of the motor and improving the efficiency of the motor.

[0025] In some embodiments, the pole shoes can include a first pole shoe and a second pole shoe, and the first pole shoe, the stator core, and the second pole shoe can be arranged along the axial direction of the stator assembly.

[0026] The first pole shoe and the second pole shoe have the same structure as the pole shoe described above, so that the stator teeth on both sides of the stator assembly can be matched with the first pole shoe and the second pole shoe, respectively, thereby ensuring uniform distribution of the magnetic field on both sides of the stator core to improve the performance of the motor.

[0027] In some embodiments, the edge of the first stator tooth close to the second stator tooth and the edge of the second stator tooth close to the first stator tooth are provided with a stepped structure, and the stepped structure is matched and connected with the matching part.

[0028] Since the stator slot is filled with cooling liquid, the stepped structure on the edge of the stator tooth can be tightly matched with the matching part to achieve axial sealing of the stator assembly, thereby reducing the leakage of the cooling liquid.

[0029] In some embodiments, the stepped structure includes two layers of steps. In this way, the sealing effect of the stator assembly can be better, and the leakage of the cooling liquid can be further reduced.

[0030] In some embodiments, the stator core includes a plurality of layers of magnetically conductive sheets, and the plurality of layers of magnetically conductive sheets constitute the stator teeth and the stator yoke.

[0031] The stator teeth and the stator yoke are formed by stacking the plurality of magnetically conductive sheets, so that the eddy current loss of the stator core is reduced, the heat generation of the stator core is reduced, and the efficiency of the motor is improved.

[0032] In some embodiments, the stator core is formed by winding the plurality of magnetically conductive sheets in a circumferential direction. The stator core is formed by continuously winding the plurality of magnetically conductive sheets to form a required annular structure, so that the processing procedure of the stator core is reduced, and the production efficiency is improved.

[0033] In some embodiments, the stator assembly further includes a winding disposed in the first stator slot and the second stator slot. The winding is used to transmit electric energy, and a magnetic field is generated when an electric current passes through the winding, so as to drive the motor to rotate.

[0034] In some embodiments, the stator assembly further includes a housing, and the housing defines an accommodating cavity in which the stator core, the winding and the pole shoes are disposed.

[0035] The accommodating cavity is used to fix the stator core, the winding and the pole shoes, so that the displacement of the stator core, the winding and the pole shoes during the rotation of the motor is prevented, and the normal operation of the motor is ensured.

[0036] In a third aspect, the present application provides a motor, which can include the stator assembly.

[0037] In some embodiments, the motor further includes a first rotor and a second rotor, and the first rotor and the second rotor are respectively disposed on two sides of the stator assembly. The first rotor and the second rotor are provided with a plurality of magnets, the directions of the magnetic flux paths in two adjacent magnets in the same rotor are opposite, and the directions of the magnetic flux paths in two magnets on two sides of the same stator tooth are the same.

[0038] In this way, the magnetic flux path of the motor passes through the stator tooth and does not pass through the stator yoke, so that the iron loss caused by the stator yoke is reduced, and the efficiency of the motor is improved.

[0039] In a fourth aspect, the present application provides a vehicle including the motor. It should be noted that the technical effects brought by the implementation manners of the second aspect, the third aspect and the fourth aspect can refer to the technical effects brought by the corresponding implementation manners of the first aspect, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0041] Figure 1A structure schematic diagram of a pole shoe provided by an embodiment of the present application;

[0042] Figure 2 A structure schematic diagram of a stator assembly provided by an embodiment of the present application;

[0043] Figure 3 Torque ripple diagrams of a motor in three working conditions with or without a pole shoe in an embodiment of the present application;

[0044] Figure 4 A structure schematic diagram of a stator assembly provided by an embodiment of the present application; Figure 2 A sectional view of the stator assembly shown in FIG. 1;

[0045] Figure 5 An exploded view of the stator assembly shown in FIG. 1; Figure 2 An exploded view of the stator assembly shown in FIG. 1;

[0046] Figure 6 A structure schematic diagram of a stator core provided by an embodiment of the present application;

[0047] Figure 7 A main magnetic flux schematic diagram of an axial motor in the prior art;

[0048] Figure 8 A main magnetic flux schematic diagram of a motor provided by an embodiment of the present application;

[0049] Figure 9 A structure schematic diagram of a magnetic conductive sheet provided by an embodiment of the present application;

[0050] Figure 10 A structure schematic diagram of a magnetic conductive sheet provided by an embodiment of the present application.

[0051] Reference signs: 1000, stator assembly;

[0052] 100, pole shoe; 100A, first pole shoe; 100B, second pole shoe; 110, connecting part; 111, first connecting part; 112, second connecting part; 110A, annular shoe body; 120, fitting part; 121, first fitting part; 122, second fitting part; 123, third fitting part; a, first curve; b, second curve; c, third curve; d, fourth curve; e, fifth curve; f, sixth curve;

[0053] 200, stator core; 210, stator tooth; 210A, annular tooth body; 211, first stator tooth; 212, second stator tooth; 220, stator yoke; 221, first stator yoke; 231, first stator slot; 232, second stator slot; 240, stepped structure; 250, magnetic conductive sheet;

[0054] 300, winding; 400, housing; 410, cover plate; 411, first cover plate; 412, second cover plate; 420, outer shell; 430, inner shell;

[0055] 500, first rotor; 600, second rotor; 700, magnet; 710, first magnet; 720, second magnet; 730, third magnet; 740, fourth magnet. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0057] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specified, the above directional description can be flexibly arranged in the actual application process under the condition of meeting the relative positional relationship shown in the drawings.

[0058] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0059] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connection", "communication" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] In the embodiments of the present application, the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, article or apparatus that comprises a list of elements not only includes those elements, but also includes other elements not expressly listed or inherent to such process, article or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, article or apparatus comprising the element.

[0061] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example or illustration. Any embodiment or design presented as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or advantageous than other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is merely intended to present a specific example or illustration.

[0062] With the development of technology and the improvement of environmental awareness, the utilization rate of energy can be improved by improving the performance of the motor, so the performance of the motor is paid more and more attention.

[0063] The motor refers to an electromagnetic device that realizes electric energy conversion or transmission according to electromagnetic induction law. Its main function is to generate driving torque as the power source of electric appliances or various machines. In many magnetic flux motors, pole shoes are often provided. The pole shoes help to improve the magnetic field distribution in the motor, thereby improving the performance of the motor.

[0064] In the prior art, the pole shoe often adopts a multi-section structure, so that the structure of the pole shoe is unstable, and the positioning is relatively complex and inconvenient to install.

[0065] Therefore, the embodiments of the present application provide a pole shoe. The pole shoe can be connected into an integrated structure through the connecting part 110, so that the positioning of the pole shoe and the stator core is simpler and more convenient to install.

[0066] Please refer to Figure 1 and Figure 2 , Figure 1 a structure schematic view of a pole shoe 100 provided by the embodiments of the present application, Figure 2 a structure schematic view of a stator assembly provided by the embodiments of the present application, the pole shoe 100 can include a plurality of cooperating parts 120, the plurality of cooperating parts 120 are arranged at intervals to form a ring-shaped shoe body 110A, and the ring-shaped shoe body 110A can be used to cooperate with the stator teeth 210.

[0067] The material of the pole shoe 100 is a magnetic conductive material, and the pole shoe 100 is matched with the stator tooth 210 through the matching part 120, which can help to concentrate the magnetic field, so that the magnetic field can be uniformly distributed in the motor, and the stability of the motor can be improved. For example, the material of the pole shoe 100 can be a sheet molding compound (SMC) formed by pressing.

[0068] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 3 is a torque ripple diagram of the motor in three working conditions with or without the pole shoe in the embodiments of the present application. For example, the three working conditions are peak torque, rated torque and minimum torque, wherein the first curve a is the peak torque ripple of the motor without the pole shoe 100, the second curve b is the peak torque ripple of the motor with the pole shoe 100, and the fluctuation of the first curve a is greater than that of the second curve b, that is, the peak torque ripple of the motor without the pole shoe 100 is greater than that of the motor with the pole shoe 100.

[0069] The third curve c is the rated torque ripple of the motor without the pole shoe 100, and the fourth curve d is the rated torque ripple of the motor with the pole shoe 100. The fluctuation of the third curve c is greater than that of the fourth curve d, that is, the rated torque ripple of the motor without the pole shoe 100 is greater than that of the motor with the pole shoe 100.

[0070] The fifth curve e is the minimum torque ripple of the motor without the pole shoe 100, and the sixth curve f is the minimum torque ripple of the motor with the pole shoe 100. The fluctuation of the fifth curve e is greater than that of the sixth curve f, that is, the minimum torque ripple of the motor without the pole shoe 100 is greater than that of the motor with the pole shoe 100.

[0071] In summary, when the motor has the pole shoe 100, the torque ripple of the motor is smaller, and the stability is better.

[0072] Since the annular shoe body 110A is used to cooperate with the stator tooth 210, the annular shoe body 110A includes a plurality of matching parts 120, and the plurality of matching parts 120 are matched with the stator tooth 210. In this way, the plurality of matching parts 120 need to be positioned with the stator tooth 210, so as to be matched with the stator tooth 210, and the installation is more complex. Therefore, the pole shoe 100 provided in the embodiments of the present application can further include a connecting part 110, and the plurality of matching parts 120 are connected through the connecting part 110.

[0073] The plurality of matching parts 120 are connected through the connecting part 110, so that the plurality of matching parts 120 are connected as a whole. In this way, when the annular shoe body 110A is matched with the stator tooth 210, the positioning is simpler and the installation is facilitated.

[0074] In some embodiments of the present application, the connecting portion 110 can include a first connecting portion 111 disposed at the outer circumferential side of the annular shoe body 110A, and the first connecting portion 111 is connected with each of the plurality of engaging portions 120.

[0075] In this way, the first connecting portion 111 can connect the plurality of engaging portions 120 as a whole, facilitating installation, and the first connecting portion 111 is disposed at the outer circumferential side of the annular pole shoe 100, which can reduce the interference of the first connecting portion 111 to the performance of the motor stator.

[0076] In some embodiments of the present application, the connecting portion 110 can further include a second connecting portion 112 disposed at the inner circumferential side of the annular shoe body 110A, and each of the plurality of engaging portions 120 is connected between the first connecting portion 111 and the second connecting portion 112.

[0077] The second connecting portion 112 is disposed at the inner circumferential side of the annular shoe body 110A, which can reduce the interference of the second connecting portion 112 to the performance of the motor stator, and in addition, the first connecting portion 111 and the second connecting portion 112 can be used to connect the plurality of engaging portions 120 as a whole, thereby making the structure of the pole shoe 100 more stable.

[0078] In some embodiments of the present application, the plurality of engaging portions 120 extend in a direction from the first connecting portion 111 to the second connecting portion 112.

[0079] Since the engaging portion 120 is used to cooperate with the stator tooth 210 to make the magnetic field distribution uniform, the engaging portion 120 extends in a direction from the first connecting portion 111 to the second connecting portion 112, which can make the first connecting portion 111 and the second connecting portion 112 fully contact, thereby making the magnetic field on the stator uniformly distributed, and further improving the performance of the motor.

[0080] In some embodiments of the present application, the engaging portion 120 can include a first engaging portion 121 and a second engaging portion 122 adjacent to each other, and a first gap is formed between the first engaging portion 121 and the second engaging portion 122, and the first gap is used to accommodate the stator tooth 210.

[0081] In this way, the first gap is used to accommodate the stator tooth 210, and the magnetic circuit of the stator tooth 210 does not pass through the engaging portion 120, which can avoid the magnetic property of the engaging portion 120 interfering with the main magnetic field and affecting the performance of the motor.

[0082] Since the stator teeth 210 gradually increase in size along the first direction, in this embodiment, the distance between the first fitting part 121 and the second fitting part 122 gradually increases along the first direction, which is the direction from the second connecting part 112 to the first connecting part 111. In this way, the first fitting part 121 and the second fitting part 122 can be fitted with the stator teeth 210.

[0083] In some embodiments of the present application, the fitting part 120 can further include a third fitting part 123, the second fitting part 122 is arranged between the first fitting part 121 and the third fitting part 123, and the distance between the third fitting part 123 and the second fitting part 122 gradually decreases along the first direction, or the third fitting part 123 is arranged parallel to the second fitting part 122.

[0084] Since the stator includes a plurality of stator teeth 210, the first fitting part 121 and the second fitting part 122 can be used to fit two edges of one stator tooth 210, and the third fitting part 123 can be used to fit one edge of an adjacent stator tooth 210. If the gap between the adjacent edges of the adjacent stator teeth 210 gradually increases along the first direction, the distance between the third fitting part 123 and the second fitting part 122 can gradually increase along the first direction. If the adjacent edges of the adjacent stator teeth 210 are arranged in parallel, the third fitting part 123 is arranged parallel to the second fitting part 122.

[0085] Please refer to Figures 2 to 6 , Figure 3 for a structural schematic diagram of a stator assembly 1000 provided by an embodiment of the present application, Figure 4 for Figure 2 a sectional view of the stator assembly 1000 shown in FIG. 2, Figure 5 for Figure 2 an exploded view of the stator assembly 1000 shown in FIG. 3, Figure 6 for a structural schematic diagram of a stator core 200 provided by an embodiment of the present application, the present application also provides a stator assembly 1000, which can include the above-mentioned pole shoe 100.

[0086] In some embodiments of the present application, the stator assembly 1000 can further include a stator core 200, and the stator core 200 includes a plurality of stator teeth 210, which are arranged in a spaced manner to form a ring-shaped tooth body 210A, and the ring-shaped tooth body 210A is fitted with the ring-shaped shoe body 110A.

[0087] The plurality of stator teeth 210 are arranged in a spaced manner to form a ring-shaped tooth body 210A, which can make the stator core 200 maintain a uniform and stable structure during high-speed rotation, and is not prone to deformation or displacement. At the same time, a hollow region is formed inside the ring-shaped tooth body 210A, which can increase the heat dissipation area of the stator core 200 and improve the heat dissipation efficiency of the motor.

[0088] Since the plurality of stator teeth 210 are arranged in a ring-shaped tooth body 210A, the stator teeth 210 need to be accurately positioned when spliced to ensure good performance of the motor, and therefore, in some embodiments of the present application, the stator core 200 can further include a stator yoke 220 connected between two adjacent stator teeth 210.

[0089] In this way, when the stator core 200 is installed, it is not necessary to assemble individual stator teeth 210, so that the stator teeth 210 can be uniformly distributed in the circumferential direction, thereby ensuring the performance of the motor.

[0090] Please refer to Figure 7 , Figure 7 for a schematic diagram of the main magnetic flux of an axial motor in the prior art, Figure 7 The magnetic circuit of the motor passes through the stator yoke 220, which can cause the motor iron loss to increase, thereby resulting in low motor efficiency.

[0091] Please refer to Figures 1 to 8 , Figure 8 for a schematic diagram of the main magnetic flux of a motor according to an embodiment of the present application, in some embodiments of the present application, the stator teeth 210 can include a first stator tooth 211 and an adjacent second stator tooth 212, the stator yoke 220 includes a first stator yoke 221 disposed between the first stator tooth 211 and the second stator tooth 212, a first stator slot 231 and a second stator slot 232 are formed between the first stator tooth 211 and the second stator tooth 212, and the first stator slot 231, the first stator yoke 221 and the second stator slot 232 are arranged along the axial direction of the stator assembly 1000.

[0092] In this way, the first stator slot 231 and the second stator slot 232 can each be provided with a winding 300, so that the main magnetic flux of the motor does not pass through the stator yoke 220, thereby reducing the iron loss of the motor and improving the efficiency of the motor.

[0093] In some embodiments of the present application, the pole shoe 100 can include a first pole shoe 100A and a second pole shoe 100B, and the first pole shoe 100A, the stator core 200 and the second pole shoe 100B are arranged along the axial direction of the stator assembly 1000.

[0094] The structure of the first pole shoe 100A and the second pole shoe 100B is the same as that of the above-mentioned pole shoe 100, in this way, the stator teeth 210 can be matched with the first pole shoe 100A and the second pole shoe 100B on both sides of the stator assembly 1000 in the axial direction, so that the magnetic field on both sides of the stator core 200 is uniformly distributed to improve the performance of the motor.

[0095] In addition, a stator slot is formed between two adjacent stator teeth 210, the first pole shoe 100A and the second pole shoe 100B are matched with the stator core 200, and the matching part 120 can also prevent the winding 300 in the stator slot from being separated, so that the motor performance is more stable.

[0096] Please refer to Figures 1 to 9 , Figure 9 One of the structure schematic diagrams of the magnetic conductive sheet 250 provided in the embodiments of the present application, in some embodiments of the present application, the edge of the first stator tooth 211 close to the second stator tooth 212 and the edge of the second stator tooth 212 close to the first stator tooth 211 are both provided with a stepped structure 240, and the stepped structure 240 is matched and connected with the matching part 120.

[0097] Since the stator slot is filled with cooling liquid, the edge of the stator tooth 210 is provided with the stepped structure 240, which can be tightly matched with the matching part 120 to realize the axial sealing of the stator assembly 1000, so that the leakage of the cooling liquid can be reduced.

[0098] In some embodiments of the present application, the stepped structure 240 includes two layers of steps. In this way, the sealing effect of the stator assembly 1000 can be better, and the leakage of the cooling liquid can be further reduced.

[0099] In some embodiments of the present application, the stator core 200 can include a plurality of layers of magnetic conductive sheets 250, and the plurality of layers of magnetic conductive sheets 250 constitute the stator teeth 210 and the stator yoke 220.

[0100] Using a plurality of layers of magnetic conductive sheets 250 to stack to constitute the stator teeth 210 and the stator yoke 220 can reduce the eddy current loss of the stator core 200, thereby reducing the heating of the core and improving the efficiency of the motor.

[0101] For example, the material of the magnetic conductive sheet 250 can be silicon steel sheet, soft magnetic alloy, iron-aluminum-silicon alloy or amorphous alloy, which is not limited in the present application.

[0102] Please refer to Figures 1 to 10 , Figure 10 The second structure schematic diagram of the magnetic conductive sheet 250 provided in the embodiments of the present application, in some embodiments of the present application, the stator core 200 is circumferentially wound by the magnetic conductive sheet 250. The stator core 200 is formed into a required annular structure by continuous winding of the magnetic conductive sheet 250, which can reduce the processing procedure of the stator core 200 and improve the production efficiency.

[0103] In some embodiments of the present application, the stator assembly 1000 can also include a winding 300, and the winding 300 is arranged in the first stator slot 231 and the second stator slot 232.

[0104] The winding 300 is used for transmitting electric energy, and a magnetic field can be generated when electric current passes through the winding 300 to drive the motor to rotate.

[0105] In some embodiments, the winding 300 can be a concentrated winding 300, which can be installed into the stator slot after being shaped on a winding mold to increase the slot fill factor.

[0106] In some embodiments of the present application, the stator assembly 1000 can further include a housing 400, and an accommodation cavity is formed in the housing 400, and the stator core 200, the winding 300 and the pole shoe 100 are arranged in the accommodation cavity.

[0107] The accommodation cavity can be used to fix the stator core 200, the winding 300 and the pole shoe 100, so as to prevent the stator core 200, the winding 300 and the pole shoe 100 from being displaced during the rotation of the motor, thereby ensuring that the motor can operate normally.

[0108] In embodiments of the present application, the accommodation cavity can be a sealed chamber, and cooling liquid is arranged in the sealed chamber, thereby helping the stator assembly 1000 to dissipate heat and ensuring good performance of the motor.

[0109] In some embodiments, the housing 400 can include a first cover plate 411 and a second cover plate 412, and the first cover plate 411 and the second cover plate 412 are arranged on two sides of the stator core 200, respectively, and the first cover plate 411, the first pole shoe 100A, the stator core 200, the second pole shoe 100B and the second cover plate 412 are arranged in sequence along the axial direction of the stator assembly 1000.

[0110] At least part of the first cover plate 411 and the second cover plate 412 is in contact with the stator tooth 210, and the first cover plate 411 and the second cover plate 412 are both sealed and bonded to the stator tooth 210 by sealing glue. In this way, the axial sealing of the stator tooth 210 can be achieved, and the cooling liquid in the stator slot can be prevented from leaking through the axial opening of the stator core 200.

[0111] In some embodiments, the housing 400 can further include an inner shell 430 and an outer shell 420 which are arranged at a radial interval along the stator assembly 1000, the outer shell 420 is arranged on the outer circumferential surface of the stator core 200, and the inner shell 430 is arranged on the inner circumferential surface of the stator core 200, and the first cover plate 411 and the second cover plate 412 are connected to the inner shell 430 and the outer shell 420 to form a closed accommodation cavity, thereby preventing the cooling liquid from leaking.

[0112] In some embodiments, the inner shell 430 is bolted to the first cover plate 411 and the second cover plate 412, and the outer shell 420 is also bolted to the first cover plate 411 and the second cover plate 412, so that the inner shell 430 and the outer shell 420 are fastened to the first cover plate 411 and the second cover plate 412, preventing the inner shell 430 and the outer shell 420 from deviating during rotation of the motor, thereby ensuring that the cooling liquid in the stator assembly 1000 does not leak, and further ensuring the heat dissipation performance of the motor.

[0113] The embodiments of the present application also provide an electric motor, which can include the stator assembly 1000 described above.

[0114] In some embodiments of the present application, the electric motor can further include a first rotor 500 and a second rotor 600, which are respectively arranged on two sides of the stator assembly 1000; the first rotor 500 and the second rotor 600 are both provided with a plurality of magnets 700, wherein the first rotor 500 is provided with adjacent first magnets 710 and second magnets 720, the magnetic flux directions of the first magnets 710 and the second magnets 720 are opposite, the second rotor 600 is provided with adjacent third magnets 730 and fourth magnets 740, the magnetic flux directions of the third magnets 730 and the fourth magnets 740 are opposite; the first magnets 710 and the third magnets 730 are located on two sides of the same stator tooth 210, the magnetic flux directions of the first magnets 710 and the third magnets 730 are the same, the second magnets 720 and the fourth magnets 740 are located on two sides of the same stator tooth 210, the magnetic flux directions of the second magnets 720 and the fourth magnets 740 are the same.

[0115] In this way, the magnetic flux of the motor passes through the stator tooth 210 without passing through the stator yoke 220, thereby reducing the iron loss that the stator yoke 220 can bring, and further improving the efficiency of the motor.

[0116] The embodiments of the present application also provide a vehicle, which can include the electric motor described above. In this way, the efficiency of the motor is improved, thereby increasing the endurance of the vehicle.

[0117] In the description of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0118] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A pole piece, characterized in that The connecting portion (110) comprises a first connecting portion (111) arranged on the outer circumferential side of the annular shoe body (110A), and the first connecting portion (111) is connected with the plurality of cooperating portions (120).

2. The pole shoe according to claim 1, characterized in that The connecting portion (110) further comprises a second connecting portion (112) arranged on the inner circumferential side of the annular shoe body (110A), and the plurality of cooperating portions (120) are connected between the first connecting portion (111) and the second connecting portion (112).

3. The pole piece of claim 2, wherein The plurality of cooperating portions (120) extend in the direction of the first connecting portion (111) pointing to the second connecting portion (112).

4. The pole piece of claim 3, wherein The cooperating portion (120) comprises a first cooperating portion (121) and a second cooperating portion (122) adjacent to each other, and a first gap is formed between the first cooperating portion (121) and the second cooperating portion (122) for accommodating the stator tooth (210).

5. The pole shoe according to claim 4, characterized in that The distance between the first cooperating portion (121) and the second cooperating portion (122) gradually increases in a first direction, and the first direction is from the second connecting portion (112) to the first connecting portion (111). The cooperating portion (120) further comprises a third cooperating portion (123), and the second cooperating portion (122) is arranged between the first cooperating portion (121) and the third cooperating portion (123), and the distance between the third cooperating portion (123) and the second cooperating portion (122) gradually decreases in the first direction, or the third cooperating portion (123) is arranged in parallel with the second cooperating portion (122).

6. The pole piece of claim 5, wherein The stator assembly comprises a stator core (200), and the stator core (200) comprises a plurality of stator teeth (210) arranged at intervals to form an annular tooth body, and the annular tooth body cooperates with the annular shoe body (110A).

7. A stator assembly characterized by, The stator core (200) comprises a stator yoke (220) connected between two adjacent stator teeth (210).

8. The stator assembly of claim 7, wherein, ​ 9. The stator assembly of claim 8, wherein, ​ 10. The stator assembly of claim 9, wherein, The stator tooth (210) comprises a first stator tooth (211) and a second stator tooth (212) adjacent to the first stator tooth (211), the stator yoke (220) comprises a first stator yoke (221) arranged between the first stator tooth (211) and the second stator tooth (212), a first stator slot (231) and a second stator slot (232) are formed between the first stator tooth (211) and the second stator tooth (212), and the first stator slot (231), the first stator yoke (221) and the second stator slot (232) are arranged in an axial direction of the stator assembly.

11. The stator assembly of claim 10, wherein, The pole shoe (100) comprises a first pole shoe (100A) and a second pole shoe (100B), and the first pole shoe (100A), the stator core (200) and the second pole shoe (100B) are arranged in the axial direction of the stator assembly.

12. The stator assembly of claim 10, wherein, The first stator tooth (211) is provided with a stepped structure (240) near an edge of the second stator tooth (212), and the second stator tooth (212) is provided with a stepped structure (240) near an edge of the first stator tooth (211), and the stepped structure (240) is connected to the matching part (120).

13. The stator assembly of claim 12, wherein, The stepped structure (240) comprises two layers of steps.

14. The stator assembly of claim 10, wherein, The stator core (200) comprises a plurality of layers of magnetically conductive sheets (250), and the plurality of layers of magnetically conductive sheets (250) form the stator tooth (210) and the stator yoke (220).

15. The stator assembly of claim 14, wherein, The stator core (200) is formed by winding the magnetically conductive sheets (250) in a circumferential direction.

16. The stator assembly of claim 15, wherein, The winding (300) is arranged in the first stator slot (231) and the second stator slot (232).

17. The stator assembly of claim 16, wherein, The housing (400) is provided with a receiving cavity, and the stator core (200), the winding (300) and the pole shoe (100) are arranged in the receiving cavity.

18. An electric machine characterized by The stator assembly (1000) of any one of claims 7-17 is provided.

19. The electric machine of claim 18, wherein, The first rotor (500) and the second rotor (600) are arranged on two sides of the stator assembly respectively, the first rotor (500) and the second rotor (600) are provided with a plurality of magnets (700), the directions of magnetic flux in two adjacent magnets (700) in the same rotor are opposite, and the directions of magnetic flux in two magnets (700) on two sides of the same stator tooth (210) are the same.

20. A vehicle characterized by The motor of claim 18 or 19 is provided.

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