Stator core, stator assembly, linear motor, suspension system and vehicle

Abstract

The utility model discloses a stator core, a stator assembly, a linear motor, a suspension system and a vehicle, the stator core comprises a stator tooth portion and a stator yoke portion, the stator tooth portion comprises a plurality of first laminations stacked along the axial direction of the stator core, the stator yoke portion forms an integrated piece, and the first laminations are stacked along the axial direction of the stator core. And the stator yoke part is connected with the stator tooth part. The stator core of the utility model can weaken the eddy current loss of the stator tooth part, thereby improving the thrust and efficiency of the linear motor.

Description

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 2023118701791, filed on December 29, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to the field of motor technology, and in particular to a stator core, stator assembly, linear motor, suspension system, and vehicle. Background Technology

[0004] In related technologies, during the operation of a linear motor, the stator core generates eddy current losses, thereby reducing the thrust and efficiency of the linear motor. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a stator core that can reduce eddy current losses in the stator teeth, thereby improving the thrust and efficiency of the linear motor.

[0006] According to an embodiment of the present invention, a stator core includes a stator tooth portion and a stator yoke portion. The stator tooth portion includes a plurality of first laminations stacked along the axial direction of the stator core. The stator yoke portion is formed as a single piece and is connected to the stator tooth portion.

[0007] According to an embodiment of the present invention, the stator core has stator teeth formed by multiple first laminations stacked axially to reduce eddy current losses in the stator teeth, thereby improving the working efficiency of the linear motor. Furthermore, the stator core is composed of a stator yoke and stator teeth, which further reduces eddy current losses. The stator yoke is formed as a single piece.

[0008] It helps improve the accuracy of the stator yoke and the assembly accuracy of the central shaft of the stator yoke and stator assembly, thus ensuring the stable thrust and efficiency of the linear motor.

[0009] According to some embodiments of the present invention, the stator core is provided with a stator yoke and a stator toothed part that are inserted into each other.

[0010] According to some embodiments of the present invention, the stator core has a plug-in portion formed on the stator yoke and a plug-in hole formed on the stator tooth portion.

[0011] According to some embodiments of the present invention, the stator core has multiple insertion holes and multiple insertion parts, and the multiple insertion parts and the multiple insertion holes are inserted and engaged in a one-to-one correspondence.

[0012] According to some embodiments of the present invention, the stator core has multiple insertion holes and multiple insertion parts, with each insertion part and insertion hole corresponding to the other, and the insertion parts are arranged at intervals along the circumference of the stator yoke.

[0013] According to some embodiments of the present invention, the stator core has the insertion portion formed on the side of the stator yoke facing the stator teeth.

[0014] According to some embodiments of the present invention, the stator core has a first mounting hole, and the inner wall of the first mounting hole is recessed outward in the radial direction of the first mounting hole to form the insertion hole.

[0015] According to some embodiments of the present invention, in the stator core, the size of the insertion hole gradually increases from the inside to the outside in the radial direction of the first mounting hole.

[0016] According to some embodiments of the present invention, in the stator core, the end of the insertion portion near the stator teeth is spaced apart from the inner wall of the insertion hole.

[0017] According to some embodiments of the present invention, the stator core has a first assembly part in the stator yoke and a second assembly part in the stator tooth part, and the first assembly part and the second assembly part are inserted into each other.

[0018] According to some embodiments of the present invention, in the stator core, the first assembly part is formed as a snap-fit ​​groove, and the second assembly part is formed as a snap-fit ​​protrusion, wherein the snap-fit ​​protrusion cooperates with the snap-fit ​​groove.

[0019] According to some embodiments of the present invention, the stator core has the snap-fit ​​groove penetrating the stator yoke along the axial direction (X).

[0020] According to some embodiments of the present invention, the stator core further includes a second lamination, which is disposed at the axial (X) end of a plurality of first laminations, and the second lamination and the stator yoke are integral parts.

[0021] According to some embodiments of the present invention, the stator core of the second lamination and the stator yoke are provided with an annular boss at the connection point, the boss protruding from the stator yoke.

[0022] According to some embodiments of the present invention, in the stator core, at least a portion of the structure of the stator yoke is located on one side of the stator teeth so that a winding groove is formed between the stator yoke and the stator teeth, the winding groove being used for winding a coil.

[0023] According to some embodiments of the present invention, at least one of the stator teeth and the stator yoke is provided with a positioning protrusion.

[0024] According to some embodiments of the present invention, the stator core has a through hole on the stator yoke, and the positioning protrusion is formed on the inner wall of the through hole.

[0025] According to some embodiments of the present invention, the stator core has a wire groove on the outer peripheral wall of the stator teeth.

[0026] According to some embodiments of the present invention, the stator core has a plurality of evenly spaced wire grooves on the outer peripheral wall of the stator teeth.

[0027] This utility model also proposes a stator assembly.

[0028] The stator assembly according to an embodiment of the present invention includes: a stator core, wherein the stator core is the stator core described in any of the above embodiments; and a stator winding, wherein the stator winding is placed on the stator teeth and sleeved on the stator yoke.

[0029] This utility model also proposes a linear motor.

[0030] A linear motor according to an embodiment of the present invention includes: a stator assembly, wherein the stator assembly is the stator assembly described in any of the above embodiments; and a mover assembly, wherein the mover assembly is in movable cooperation with the stator assembly.

[0031] This utility model also proposes a suspension system including a linear motor as described in any of the above embodiments, wherein one of the stator assembly and the mover assembly is adapted to be connected to the vehicle body, and the other of the stator assembly and the mover assembly is adapted to be connected to a wheel.

[0032] This utility model also proposes a vehicle including the suspension system described in any of the above embodiments.

[0033] The vehicle, the suspension system, the linear motor, and the stator assembly have the same advantages as the stator core described above compared to the prior art, and will not be repeated here.

[0034] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0035] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0036] Figure 1This is a schematic diagram of the stator core according to the first embodiment of the present invention;

[0037] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0038] Figure 3 yes Figure 1 The exploded view of the stator core shown in the figure;

[0039] Figure 4 yes Figure 1 A cross-sectional view of the stator core shown;

[0040] Figure 5 This is a schematic diagram of the stator core according to the second embodiment of the present utility model;

[0041] Figure 6 yes Figure 5 The diagram shown is an exploded view of the stator core.

[0042] Figure label:

[0043] Stator core 10; Axial direction X; Stator tooth 1; First lamination 11; First mounting hole 12; Second assembly part 121; Insertion hole 13; Wire groove 14; Second lamination 15; Stator yoke 2; Yoke body 20; Insertion part 21; First sidewall 211; First assembly part 22; Through hole 3; Positioning protrusion 31; Boss 4; Winding groove 41. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0045] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0046] The following is for reference. Figures 1-6 The stator core 10 according to an embodiment of the present utility model is described.

[0047] like Figure 1 As shown, the stator core 10 according to an embodiment of the present invention includes: a stator tooth portion 1 and a stator yoke portion 2.

[0048] like Figure 2 As shown, the stator tooth section 1 includes a plurality of first laminations 11 stacked along the axial direction X of the stator core 10, and as... Figure 1 and Figure 3 As shown, the stator yoke 2 is formed as a single piece, and a through hole is formed on the single piece so that the stator yoke 2 is formed as a ring-shaped single piece, and the stator yoke 2 is connected to the stator tooth 1.

[0049] This facilitates the reduction of eddy current losses in stator teeth 1, thereby improving the thrust and efficiency of the linear motor. It also helps to improve the assembly accuracy of the stator yoke 2 and the central shaft of the stator assembly, ensuring the stable thrust and efficiency of the linear motor.

[0050] For example, the stator core 10 includes: stator teeth 1 and stator yoke 2.

[0051] like Figure 1 As shown, the stator tooth 1 and the stator yoke 2 are connected, wherein the connection method between the stator tooth 1 and the stator yoke 2 includes, but is not limited to, welding, plugging, or snap-fitting.

[0052] For example Figure 2 As shown, the stator tooth section 1 includes multiple first laminations 11, which can be silicon steel sheets. These multiple first laminations 11 are stacked along the axial direction X of the stator core 10. Compared to a structure where the stator tooth section 1 is a single conductor, the stator tooth section 1 formed by stacking multiple first laminations 11 can reduce eddy current losses. Furthermore, the stator core is composed of a stator yoke 22 and stator tooth sections 11, which further reduces eddy current losses.

[0053] Furthermore, the stator yoke 2 is formed as a single piece, which helps to improve the accuracy of the stator yoke 2 and the assembly accuracy of the stator yoke 2 and the central shaft of the stator assembly, thus ensuring the stable thrust and efficiency of the linear motor.

[0054] Optionally, part of the structure of the stator yoke 2 is located radially inside the stator tooth 1. It is worth noting that the radial direction in the above description refers to the direction toward the geometric center of the stator tooth 1 on the cross section perpendicular to the axial direction X.

[0055] For example, the outer peripheral wall of stator tooth 1 can be circular or annular, with stator yoke 2 located radially inside the annular structure. Alternatively, stator tooth 1 can be polygonal, with the direction towards the geometric center of the polygonal structure on the cross section perpendicular to the X-axis being radially inside. The outer peripheral wall of stator tooth 1 can also be other shapes, which are not limited here.

[0056] "Part of the structure of the stator yoke 2 is located on the radial inner side of the stator tooth 1" means that the stator yoke 2 is located on the side of the stator tooth 1 close to the first mounting hole 12. At least part of the stator yoke 2 may be located inside the first mounting hole 12, or the stator yoke 2 may be on the axial X side of the stator tooth 1 and located on the radial inner side of the stator tooth 1, which is not limited here.

[0057] The through hole of the stator yoke 2 and the first mounting hole 12 cooperate to define a through hole 3 extending along the axial direction X, so that the central shaft of the stator assembly can extend into the through hole 3 and movably cooperate with the through hole 3.

[0058] According to the embodiment of the present invention, the stator core 10 has a stator tooth 1 formed by stacking multiple first laminations 11 along the axial direction X, which helps to reduce the eddy current loss of the stator tooth 1 and thus improve the thrust and efficiency of the linear motor. The stator yoke 2 is formed as a single piece, which helps to improve the accuracy of the stator yoke 2 and the assembly accuracy of the stator yoke 2 and the central shaft of the stator assembly, thus ensuring the stable thrust and efficiency of the linear motor.

[0059] In some embodiments, a first connecting structure is formed on the stator yoke 2, and a second connecting structure is formed on the stator tooth 1. The first connecting structure and the second connecting structure cooperate to realize the connection between the stator tooth 1 and the stator yoke 2.

[0060] Therefore, the connection between the stator tooth 1 and the stator yoke 2 can be achieved through the cooperation of the first connection structure and the second connection structure, thereby reducing the difficulty of connecting the stator tooth 1 and the stator yoke 2 and improving the connection efficiency of the stator tooth 1 and the stator yoke 2.

[0061] The ways in which the first connecting structure and the second connecting structure cooperate include, but are not limited to, snap-fit, plug-in, bolt connection, welding, or bonding.

[0062] In some embodiments, such as Figure 1 and Figure 4 As shown, the first connecting structure and the second connecting structure are plugged into each other.

[0063] For example, the first connecting structure is a plug-in part 21 and the second connecting structure is a plug-in hole 13, or the first connecting structure is a plug-in hole 13 and the second connecting structure is a plug-in part 21.

[0064] This enhances the connection stability between the stator yoke 2 and the stator tooth 1, and simplifies the insertion and mating method, thus reducing costs.

[0065] In some embodiments, the first connection structure is formed as a plug portion 21, and the second connection structure is formed as a plug hole 13.

[0066] Therefore, the stator tooth 1 and stator yoke 2 can be connected and fixed by the insertion of the insertion part 21 and the insertion hole. The structure of the insertion part 21 and the insertion hole 13 is simpler, which reduces the difficulty of setting the first connection structure and the second connection structure, and also helps to reduce the setting cost.

[0067] In some embodiments, there are multiple insertion holes 13 and multiple insertion parts 21, with each insertion part 21 corresponding to one of the multiple insertion holes 13.

[0068] Thus, by interlocking multiple insertion parts 21 and multiple insertion holes 13 in a one-to-one manner, the connection and fixation of the stator tooth part 1 and the stator yoke part 2 are achieved, and the multiple insertions enhance the connection stability of the stator tooth part 1 and the stator yoke part 2.

[0069] For example, the insertion part 21 is located at one end of the stator yoke 2 along the axial direction X and is formed on the side of the stator yoke 2 facing the stator tooth 1. The insertion part 21 extends along the axial direction X and multiple insertion parts 21 can be distributed circumferentially spaced along the stator yoke 2. The insertion hole 13 is open at one end of the axial direction X and multiple insertion holes 13 can be distributed circumferentially spaced along the first mounting hole 12. In this way, the insertion part 21 can be inserted into the insertion hole 13 along the axial direction X to realize the assembly of the stator tooth 1 and the stator yoke 2, and it is beneficial to enhance the connection stability of the stator tooth 1 and the stator yoke 2 in the circumferential direction of the stator core 10.

[0070] Of course, the distribution direction of the insertion part 21 and the insertion hole 13 can also be axial X or other directions, which are not limited here.

[0071] In some embodiments, such as Figure 3 As shown, the stator yoke 2 includes a yoke body 20 and a plug-in part 21. Along the stacking direction of the plurality of first laminations 11, i.e. the axial direction, the yoke body 20 is disposed on one side of the stator tooth 1. Along the stacking direction of the plurality of first laminations 11, i.e. the axial direction, the plug-in part 21 is connected to the side of the yoke body 20 facing the stator tooth 1.

[0072] Thus, the yoke body 20 and the insertion part 21 are both located on the axial X side of the stator tooth part 1 on the stator core 10, and the insertion part 21 is located on the side of the yoke body 20 facing the stator tooth part 1. In this way, the stator yoke 2 can move along the axial X to realize the insertion of the insertion part 21 and the insertion hole 13.

[0073] In some embodiments, such as Figure 3 As shown, the stator tooth portion 1 is provided with a first mounting hole 12, and in the radial direction of the first mounting hole 12, the insertion hole 13 is recessed outward from the first mounting hole 12 to form the insertion hole 13.

[0074] Specifically, the side of the insertion hole 13 facing the first mounting hole 12 is open to the first mounting hole 12, so that the stamping process of the insertion hole 13 can be realized on the radially inner side, thereby reducing the processing difficulty of the insertion hole 13.

[0075] In some embodiments, such as Figure 3 As shown, the size of the insertion hole 13 gradually increases from the inside to the outside in the radial direction of the first mounting hole 12.

[0076] In this way, the width of the end of the insertion part 21 near the stator yoke 2 is smaller than the width of the end away from the stator yoke 2 in the radial direction. That is, the insertion hole 13 is a dovetail groove structure. This makes it difficult for the insertion part 21 to fall out after being inserted into the insertion hole 13, thereby enhancing the connection strength between the stator tooth part 1 and the stator yoke 2.

[0077] In some embodiments, such as Figure 4 As shown, in the circumferential direction of the stator yoke 2, the insertion part 21 has first sidewalls 211 arranged opposite to each other, and the ends of the two first sidewalls 211 adjacent to the stator teeth 1 are spaced apart from the inner wall of the insertion hole 13.

[0078] Therefore, when the insertion part 21 is inserted into the insertion hole 13, interference between the first side wall 211 and the inner wall of the insertion hole 13 can be avoided, making it easier for the insertion part 21 to be inserted into the insertion hole 13, thereby improving the assembly efficiency of the two.

[0079] In other embodiments, such as Figure 5 As shown, the stator yoke 2 is embedded in the first mounting hole 12.

[0080] Therefore, the space within the first mounting hole 12 can be used to arrange the stator yoke 2, thereby reducing the space occupied by the stator yoke 2, which is conducive to improving space utilization and reducing the overall structural size of the stator core 10, thus realizing the miniaturization design of the stator core 10.

[0081] In other embodiments, such as Figure 5 and Figure 6 As shown, the stator tooth portion 1 also includes a second lamination 15, which is disposed at the axial X end of a plurality of first laminations 11. The second lamination 15 and the stator yoke portion 2 are integral parts.

[0082] Therefore, by setting a second lamination 15, and the second lamination 15 and the stator yoke 2 being an integral part, it is easier to connect and fix the stator yoke 2 and the stator tooth 1. Furthermore, the fact that the second lamination 15 and the stator yoke 2 are an integral part makes it easier to reduce the difficulty of connecting the stator yoke 2 and the stator tooth 1.

[0083] For example Figure 2 As shown, the second lamination 15 is stacked on the lower end of the axial direction X of the plurality of first laminations 11, and the second lamination 15 and the first laminations 11 have the same shape and size. The stator yoke 2 passes through the first mounting hole 12, that is, the first mounting hole 12 is sleeved on the radial outer side of the stator yoke 2, so as to realize the design of the stator yoke 2 being embedded in the first mounting hole 12.

[0084] Therefore, by stacking the second lamination 15 and multiple first laminations 11, the eddy current loss of the stator tooth 1 is reduced. The stator yoke 2, passing through the first mounting hole 12, provides limiting support for the stator yoke 2, thereby ensuring the structural stability of the stator yoke 2. Figure 6 As shown, the stator tooth 1 can be directly assembled above the second lamination 15 along the axial direction X to complete the assembly of the stator tooth 1 and the stator yoke 2, thereby simplifying the assembly steps and improving the assembly efficiency.

[0085] In other embodiments, an annular boss 4 is provided at the connection between the second lamination 15 and the stator yoke 2, and the boss 4 protrudes from the stator yoke 2.

[0086] Therefore, by setting the boss 4, the mechanical strength of the connection between the second lamination 15 and the stator yoke 2 is enhanced, and the problem of breakage at the connection between the second lamination 15 and the stator yoke 2 is avoided, thereby improving the service life of the stator core 10. In particular, the boss 4 is constructed in a ring shape, which can enhance the mechanical strength of the connection between the second lamination 15 and the stator yoke 2 in the circumferential direction.

[0087] In other embodiments, the stator yoke 2 is provided with a first assembly part 22, and the stator tooth part is provided with a second assembly part 121. The first assembly part 22 and the second assembly part 121 are inserted and engaged to realize the insertion and engagement of the stator yoke 2 and the stator tooth part 1 and to restrict the circumferential rotation of the stator yoke 2.

[0088] Therefore, by setting the first assembly part 22 and the second assembly part 121, the relative fixation between the stator tooth part 1 and the stator yoke part 2 is achieved, the stator tooth part 1 is prevented from rotating in the circumferential direction of the stator yoke part 2, and the connection stability between the stator tooth part 1 and the stator yoke part 2 is guaranteed.

[0089] In this configuration, one of the first assembly part 22 and the second assembly part 121 can be a snap-fit ​​groove, and the other can be a snap-fit ​​protrusion, for example... Figure 6As shown, the first assembly part 22 is a snap-fit ​​groove, and the second assembly part 121 is a snap-fit ​​protrusion. The snap-fit ​​protrusion is provided on the inner wall of the first mounting hole 12. The snap-fit ​​protrusion protrudes radially inward from the first mounting hole 12 and extends along the axial direction X of the stator tooth part 1. The snap-fit ​​groove and the snap-fit ​​protrusion are designed to conform to the shape. The snap-fit ​​groove penetrates the outer peripheral wall of the stator yoke part 2 along the axial direction X.

[0090] In this way, when the stator tooth 1 is directly assembled above the second lamination 15 along the axial direction X, the snap-fit ​​protrusion snaps into the snap-fit ​​groove, so that the stator tooth 1 and the stator yoke 2 are limited by the snap-fit ​​protrusion and the snap-fit ​​groove, thereby preventing the stator tooth 1 from rotating in the circumferential direction of the stator yoke 2, and thus ensuring the connection stability of the stator tooth 1 and the stator yoke 2.

[0091] In some embodiments, such as Figure 1 As shown, at least a portion of the structure of the stator yoke 2 is located on one side of the stator tooth 1 so that a winding groove 41 is formed between the stator yoke 2 and the stator tooth 1, the winding groove 41 being used for winding a coil.

[0092] For example, at least a portion of the structure of the stator yoke 2 is located on one axial side of the stator tooth 1 to define the winding groove 41. Thus, the coil can be wound in the winding groove 41 defined between the stator yoke 2 and the stator tooth 1, thereby making full use of the space between the stator yoke 2 and the stator tooth 1 and improving space utilization.

[0093] In some embodiments, at least one of the stator tooth portion 1 and the stator yoke portion 2 is provided with a positioning protrusion 31.

[0094] It should be noted that the positioning protrusion 31 is suitable for positioning and engaging with the central shaft of the stator assembly. Thus, the positioning protrusion 31 can play a positioning and guiding role for the central shaft of the stator assembly, thereby reducing the assembly difficulty of the central shaft of the stator assembly and improving the assembly accuracy of the central shaft of the stator assembly.

[0095] For example Figure 1 and Figure 3 As shown, in the first embodiment, both the stator tooth portion 1 and the stator yoke portion 2 are provided with positioning protrusions 31. The two positioning protrusions 31 are spliced ​​together to facilitate their positioning and engagement with the central shaft of the stator assembly, thereby enhancing its assembly accuracy, or as shown in the figure. Figure 5 As shown, in the second embodiment, the stator yoke 2 is provided with a positioning protrusion 31, which is adapted to be positioned and engaged with the central shaft of the stator assembly, thereby enhancing its assembly accuracy.

[0096] In some embodiments, such as Figure 1 As shown, the positioning protrusion 31 is formed on the inner wall of the through hole of the stator yoke 2.

[0097] In this way, the stator yoke 2 can be positioned and engaged with the central axis of the stator assembly by the positioning protrusion 31, so as to play a limiting role in the circumferential direction of the stator yoke 2, thereby ensuring the motion stability of the central axis of the stator assembly.

[0098] In some embodiments, such as Figure 1 As shown, the outer peripheral wall of the stator tooth section 1 is provided with a wire groove 14.

[0099] Therefore, by setting the wire groove 14, the three-phase wires of the stator core 10 can be arranged in the wire groove 14. For example, the wire groove 14 is set on the outer peripheral wall of the stator tooth 1 and extends along the axial direction X, so as to avoid interference between the three-phase wires and the stator yoke 2, and to reduce the processing difficulty of the wire groove 14.

[0100] The wire groove 14 can be made by stamping and stacking the first lamination 11. The wire groove 14 is open to the radial outer side of the stator tooth 1 so that the three-phase wires can be installed into the wire groove 14 along the opening of the wire groove 14, and at least part of the three-phase wires can be arranged along the axial direction X to reduce the difficulty of arranging the three-phase wires.

[0101] In some embodiments, the outer peripheral wall of the stator tooth portion 1 is provided with a plurality of evenly spaced wire grooves 14.

[0102] Therefore, by providing the wire guide slots 14, the three-phase wires of the stator core 10 can be arranged within the wire guide slots 14. For example, there can be three wire guide slots 14, which are evenly spaced along the circumference of the stator teeth 1. This facilitates the installation of the three-phase wires of the stator core 10. In particular, after the positioning protrusion 31 is positioned and engaged with the central shaft of the stator assembly, it can be ensured that the three wire guide slots 14, which are evenly spaced along the circumference of the stator teeth 1, are aligned.

[0103] The wire groove 14 can be made by stamping and stacking the first lamination 11. The wire groove 14 is open to the radial outer side of the stator tooth 1 so that the three-phase wires can be installed into the wire groove 14 along the opening of the wire groove 14, and at least part of the three-phase wires can be arranged along the axial direction X to reduce the difficulty of arranging the three-phase wires.

[0104] The following is in conjunction with the appendix Figures 1-6 Some specific embodiments of the stator core 10 of this utility model are described below:

[0105] The stator core 10 can be used in a three-phase permanent magnet synchronous linear motor, and it consists of a stator tooth section 11 and a stator yoke section 22.

[0106] Specifically, this utility model discloses two types of stator cores 10, such as... Figures 1-4 For the first type of stator core 10, such as Figure 5 and Figure 6 The second type of stator core is 10.

[0107] Both types of stator cores 10 have stator teeth 1 composed of first laminations 11 of silicon steel sheets stacked axially X-axis. The stator yoke 2 is a single piece, i.e., a solid material, and both stator yoke 2 are composed of a single piece of soft magnetic material. The stator yoke 2 is installed on the stator teeth 1 to form the stator core 10.

[0108] The assembled stator core 10 can significantly reduce eddy current losses. Both the stamping and lamination processes and the machining processes for solid materials are very mature; therefore, the structure of the stator teeth 1 composed of silicon steel sheets in the first lamination 11 along the X-axis and the stator yoke 2 made of solid material in this utility model is highly feasible. While significantly reducing eddy current losses, it can ensure accuracy, as well as the motor's thrust and efficiency.

[0109] In the first embodiment:

[0110] The inner peripheral wall of the through hole 3 is provided with a positioning protrusion 31. When the stator core 10 and the central shaft of the stator assembly are in an interference fit, the positioning protrusion 31 can be embedded in the groove of the central shaft to prevent the stator core 10 from rotating, and also ensure that the three-phase wire slots 14 on the stator tooth 1 are aligned.

[0111] The stator yoke 2 inserts the connector 21 into the connector hole 13 of the stator tooth 1 made of stacked silicon steel sheets and fixes it to the stator tooth 1. At the same time, laser welding is used to further strengthen the connection strength between the stator tooth 1 and the stator yoke 2. This structure enables the stator tooth 1, composed of the first stack of silicon steel sheets stacked in the axial X direction, to significantly reduce the eddy current loss in the stator core 10, thereby improving the thrust and efficiency of the motor.

[0112] The insertion hole 13 can be a dovetail groove. A trapezoidal punch is used to punch a dovetail groove shape into the stator tooth 1, which becomes wider as it approaches the outer edge. When the insertion part 21 of the stator yoke 2 is inserted into the dovetail groove of the stator tooth 1, because the width of the opening of the dovetail groove is smaller than the width of the bottom of the dovetail groove, the insertion part 21 is guaranteed not to slip out in the insertion hole 13, thus strengthening the fixation of the stator tooth 1 and the stator yoke 2.

[0113] Optionally, the bottom of the insertion hole 13 can be rounded to avoid interference between the insertion part 21 and the inner wall of the insertion hole 13 during assembly. The insertion hole 13 with rounded corners is formed by a punch with rounded corners, which improves the service life of the punch.

[0114] Furthermore, when the insertion part 21 is inserted into the insertion hole 13 of the stator tooth part 1, there is a risk that the bottom end face of the insertion part 21 may not fit properly with the end face of the stator tooth part 1 due to the rounded corners formed by the side and bottom end faces of the insertion part 21. By using a trapezoidal punch to form a certain angle towards the center line of the insertion part 21 between the bottom end face and the side face of the insertion part 21, it is possible to ensure that the stator yoke part 2 and the stator tooth part 1 can fit properly even when there are rounded corners on the bottom end face of the insertion part 21, thus ensuring the reliability of the structure.

[0115] In the second embodiment:

[0116] The maximum outer diameter of the stator yoke 2 is the same as the maximum inner diameter of the first mounting hole 12. The stator tooth 1 is fitted on the outside of the central stator yoke 2. The inner peripheral wall of the through hole 3 is provided with a positioning protrusion 31. When the stator core 10 and the central shaft of the stator assembly are interference-fitted, the positioning protrusion 31 is embedded in the groove of the central shaft to prevent the stator core 10 from rotating, and also to ensure that the three-phase wire slots 14 on the stator tooth 1 are aligned.

[0117] like Figure 6 As shown, the first assembly part 22 of the stator yoke 2 is a snap-fit ​​groove, and the second assembly part 121 of the stator tooth 1 is a snap-fit ​​protrusion. The snap-fit ​​protrusion is provided on the inner wall of the first mounting hole 12. The snap-fit ​​protrusion protrudes radially inward toward the first mounting hole 12 and extends along the axial direction X of the stator tooth 1. The snap-fit ​​groove and the snap-fit ​​protrusion are designed to conform to the shape. When the stator tooth 1 is fitted onto the stator yoke 2 along the axial direction X, the snap-fit ​​protrusion snaps into the snap-fit ​​groove, so that the stator tooth 1 and the stator yoke 2 are limited by the snap-fit ​​protrusion and the snap-fit ​​groove, thereby preventing the stator tooth 1 from rotating in the circumferential direction of the stator yoke 2, and thus ensuring the connection stability of the stator tooth 1 and the stator yoke 2.

[0118] Meanwhile, combined with the setting of the positioning protrusion 31, it can further ensure the alignment of the three-phase wire passage slots 14 on the stator tooth 1. While the stator yoke 2 and the stator tooth 1 are mechanically connected, laser welding is used to further strengthen the connection strength between the stator yoke 2 and the stator tooth 1. This structure enables the stator tooth 1, which is made of the first lamination 11 (silicon steel sheet) stacked axially in the X direction, to significantly reduce the eddy current loss in the stator core 10. At the same time, it can ensure the assembly tolerance of the stator core 10, and also ensure the thrust and efficiency of the motor.

[0119] Furthermore, the stator tooth portion 1 also includes a second lamination 15, for example... Figure 2 As shown, the second lamination 15 is stacked on the lower end of the axial direction X of the plurality of first laminations 11, and the second lamination 15 and the first laminations 11 have the same shape and size. The stator yoke 2 passes through the first mounting hole 12, that is, the first mounting hole 12 is sleeved on the radial outer side of the stator yoke 2, so as to realize the design of the stator yoke 2 being embedded in the first mounting hole 12.

[0120] Therefore, the stacked second laminations 15 and multiple first laminations 11 reduce the eddy current losses of the stator teeth 1, while the stator yoke 2 passes through the first mounting hole 12, which provides limiting support for the stator yoke 2, thereby ensuring the structural stability of the stator yoke 2. Figure 6 As shown, the stator tooth 1 can be directly assembled above the second lamination 15 along the axial direction X to complete the assembly of the stator tooth 1 and the stator yoke 2, thereby simplifying the assembly steps and improving the assembly efficiency.

[0121] It should be noted that during the installation of the stator core 10, the second lamination 15 is stacked with the first lamination 11 located on the lower side of the axial direction X, and the bottom plane of the stator yoke 2 is pressed and fixed together with the first lamination 11 located on the upper side of the axial direction X. During motor operation, the second lamination 15 and multiple first laminations 11 are simultaneously subjected to electromagnetic forces. Due to the thinner thickness of the second lamination 15, there is a risk of it breaking off from the center of the stator yoke 2.

[0122] Therefore, in this utility model, an annular boss 4 is provided at the connection between the second lamination 15 and the stator yoke 2 to prevent the connection between the second lamination 15 and the stator yoke 2 from breaking during motor operation. At the same time, in order to meet the tolerance, the upper and lower end faces of the stator core 10 will be ground during processing, and the second lamination 15 will become thinner. Therefore, the boss 4 can further strengthen the mechanical strength of the connection.

[0123] In addition, the upper end face and the lower end face of the stator yoke 2 are the upper and lower end faces of the stator yoke 2, which are made of a single piece of soft magnetic material. The processing technology of this single piece of material is relatively mature, which can ensure that the stator core 10 meets the tolerance requirements.

[0124] In summary, this utility model has at least the following advantages over the prior art:

[0125] 1. The structure of the stator tooth section 1 consisting of multiple first laminations 11 can significantly reduce the eddy current loss of the stator core 10, while ensuring high motor thrust and efficiency.

[0126] 2. The stator yoke 2 of the integral part and the stacked stator teeth 1 have high process feasibility.

[0127] 3. In addition to mechanical connection, the connection between stator tooth 1 and stator yoke 2 can be strengthened by laser welding, which can make the structure more robust and reliable.

[0128] 4. The stator yoke 2 is machined from solid material, which has the characteristics of high precision and can form a precise fit with the central shaft.

[0129] 5. The inner circumference of the stator tooth 1 (i.e. the inner circumferential wall of the first mounting hole 12) is formed by stamping, which has the characteristics of high precision and can form a precise fit with the central shaft.

[0130] 6. The positioning protrusions 31 formed by stamping on the inner peripheral wall of the stator yoke 2 can improve the assembly accuracy with the central shaft and ensure the stable thrust and efficiency of the motor.

[0131] 7. The positioning protrusion 31 formed by stamping on the inner circumference of the stator tooth 1 (i.e. the inner circumferential wall of the first mounting hole 12) can improve the assembly accuracy with the central shaft, ensuring the stable thrust and efficiency of the motor, while also ensuring the alignment of the three-phase wire slots 14 of the stator core 10.

[0132] 8. High utilization rate of stator core 10.

[0133] This utility model also proposes a stator assembly.

[0134] The stator assembly according to the present utility model includes: a stator core 10 and a stator winding, wherein the stator core 10 is the stator core 10 of any of the above embodiments, and the stator winding is placed on the stator tooth portion 1 and sleeved on the stator yoke portion 2.

[0135] This allows the stator tooth 1 to support the stator winding, and the stator yoke 2 to limit the stator winding, thereby enhancing the structural stability of the stator winding. At the same time, the stator winding is sleeved on the stator yoke 2, which can prevent interference between the stator winding and the moving part of the motor assembly.

[0136] In addition, the stator winding can make full use of the space between the stator tooth section 1 and the stator yoke section 2, thereby improving the space utilization rate and reducing the overall structural size of the stator assembly, which is conducive to realizing the miniaturization design of the stator assembly.

[0137] In particular, when the linear motor is running, the magnetic lines of force mainly extend along the radial direction in the stator tooth section 1 and the axial direction X in the stator yoke section 2. The first lamination 11 stacked in the axial direction X can significantly reduce the eddy current losses generated in the stator tooth section 1.

[0138] According to the stator assembly of this utility model embodiment, the stator tooth 1 is formed by stacking multiple first laminations 11 along the axial direction X, so as to reduce the eddy current loss of the stator tooth 1 and thereby improve the thrust and efficiency of the linear motor. The stator yoke 2 is formed as a single piece, which is beneficial to improve the accuracy of the stator yoke 2 and the assembly accuracy of the stator yoke 2 and the central axis of the stator assembly, thus ensuring the stable thrust and efficiency of the linear motor.

[0139] This utility model also proposes a linear motor.

[0140] The linear motor according to an embodiment of the present invention includes: a stator assembly and a mover assembly, wherein the stator assembly is the stator assembly of any of the above embodiments, and the mover assembly is in movable cooperation with the stator assembly.

[0141] According to the embodiment of the present invention, the stator tooth 1 of the linear motor is formed by stacking multiple first laminations 11 along the axial direction X, so as to reduce the eddy current loss of the stator tooth 1 and thereby improve the thrust and efficiency of the linear motor. The stator yoke 2 is formed as a single piece, and a through hole is formed on the single piece, which helps to improve the accuracy of the stator yoke 2 and the assembly accuracy of the stator yoke 2 and the central shaft of the stator assembly, thus ensuring the stable thrust and efficiency of the linear motor.

[0142] This utility model also proposes a suspension system including a linear motor of any of the above embodiments, one of the stator assembly and the mover assembly being adapted to be connected to the vehicle body, and the other of the stator assembly and the mover assembly being adapted to be connected to the wheel.

[0143] Therefore, a linear motor can be used to transmit the force and torque acting between the wheels and the vehicle body, and to buffer the impact force transmitted to the vehicle body from uneven road surfaces, thereby playing a role in vibration reduction and ensuring that the vehicle can drive smoothly.

[0144] According to the suspension system of this utility model embodiment, the stator teeth 1 of the stator assembly is formed by stacking multiple first laminations 11 along the axial direction X, so as to reduce the eddy current loss of the stator teeth 1, thereby improving the thrust and efficiency of the linear motor, while the stator yoke 2 is formed as a single piece.

[0145] This helps improve the accuracy of the stator yoke 2 and the assembly accuracy of the stator yoke 2 and the central shaft of the stator assembly, thus ensuring the stable thrust and efficiency of the linear motor.

[0146] This utility model also proposes a vehicle including the suspension system of any of the above embodiments.

[0147] According to the vehicle of this utility model embodiment, the stator teeth 1 of the stator assembly is formed by stacking multiple first laminations 11 along the axial direction X, so as to reduce the eddy current loss of the stator teeth 1, thereby improving the thrust and efficiency of the linear motor, while the stator yoke 2 is formed as a single piece.

[0148] This helps improve the accuracy of the stator yoke 2 and the assembly accuracy of the stator yoke 2 and the central shaft of the stator assembly, thus ensuring the stable thrust and efficiency of the linear motor.

[0149] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0150] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0151] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0152] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0153] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0154] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator core (10), characterized in that, include: Stator teeth (1), the stator teeth (1) comprising a plurality of first laminations (11) stacked along the axial (X) direction of the stator core (10); The stator yoke (2) is formed as a single piece and is connected to the stator tooth (1).

2. The stator core (10) according to claim 1, characterized in that, The stator yoke (2) and the stator tooth (1) are inserted into each other.

3. The stator core (10) according to claim 2, characterized in that, The stator yoke (2) has a plug-in portion (21), and the stator tooth portion (1) has a plug-in hole (13).

4. The stator core (10) according to claim 3, characterized in that, The insertion holes (13) are provided in multiple ways, and the insertion parts (21) are provided in multiple ways. The multiple insertion parts (21) and the multiple insertion holes (13) are arranged in a one-to-one correspondence. The multiple insertion parts are arranged at intervals along the circumference of the stator yoke (2).

5. The stator core (10) according to claim 3, characterized in that, The insertion portion is formed on the side of the stator yoke (2) facing the stator teeth (1).

6. The stator core (10) according to claim 3, characterized in that, The stator tooth (1) is provided with a first mounting hole (12), and the inner wall of the first mounting hole (12) is recessed outward in the radial direction of the first mounting hole (12) to form the insertion hole (13).

7. The stator core (10) according to claim 6, characterized in that, In the radial direction of the first mounting hole (12), the size of the insertion hole (13) gradually increases from the inside to the outside.

8. The stator core (10) according to claim 7, characterized in that, The end of the insertion part near the stator teeth is spaced apart from the inner wall of the insertion hole (13).

9. The stator core (10) according to claim 2, characterized in that, The stator yoke (2) is provided with a first assembly part (22), and the stator tooth part (1) is provided with a second assembly part (121). The first assembly part (22) and the second assembly part (121) are inserted into each other.

10. The stator core (10) according to claim 9, characterized in that, The first assembly part (22) is formed as a snap-fit ​​groove, and the second assembly part (121) is formed as a snap-fit ​​protrusion, wherein the snap-fit ​​protrusion engages with the snap-fit ​​groove.

11. The stator core according to claim 10, characterized in that, The snap-fit ​​groove extends through the stator yoke (2) along the axial direction (X).

12. The stator core (10) according to claim 1, characterized in that, The stator tooth portion (1) further includes a second lamination (15), which is disposed at the axial (X) end of a plurality of first laminations (11), and the second lamination (15) and the stator yoke portion (2) are integral parts.

13. The stator core (10) according to claim 12, characterized in that, An annular boss (4) is provided at the connection between the second lamination (15) and the stator yoke (2), and the boss (4) protrudes from the stator yoke (2).

14. The stator core (10) according to claim 1, characterized in that, At least a portion of the structure of the stator yoke (2) is located on one side of the stator tooth (1) such that a winding groove (41) is formed between the stator yoke (2) and the stator tooth (1), the winding groove (41) being used for winding a coil.

15. The stator core (10) according to claim 1, characterized in that, At least one of the stator teeth (1) and the stator yoke (2) is provided with a positioning protrusion (31).

16. The stator core (10) according to claim 15, characterized in that, The stator yoke (2) is provided with a through hole, and the positioning protrusion (31) is formed on the inner wall of the through hole.

17. The stator core (10) according to claim 1, characterized in that, The outer peripheral wall of the stator tooth section (1) is provided with a wire groove (14).

18. The stator core (10) according to claim 1, characterized in that, The outer peripheral wall of the stator tooth section (1) is provided with a plurality of evenly spaced wire grooves (14).

19. A stator assembly, characterized in that, include: Stator core (10), wherein the stator core (10) is the stator core (10) according to any one of claims 1-18; The stator winding is placed on the stator tooth portion (1) and sleeved on the stator yoke portion (2).

20. A linear motor, characterized in that, include: A stator assembly, said stator assembly being the stator assembly according to claim 19; A mover assembly that is in movable cooperation with the stator assembly.

21. A suspension system, characterized in that, The linear motor according to claim 20 includes one of the stator assembly and the mover assembly adapted to be connected to a vehicle body, and the other of the stator assembly and the mover assembly adapted to be connected to a wheel.

22. A vehicle, characterized in that, Includes the suspension system according to claim 21.

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