Spliced stator and motor

Abstract

The utility model relates to a block-spliced stator and a motor, and the block-spliced stator comprises a stator seat which extends in a surrounding manner along a circumferential direction so as to form an accommodation cavity, and the cavity wall of the accommodation cavity comprises an annular supporting surface; the multiple splicing units are located in the containing cavity, the multiple splicing units are sequentially arranged in the circumferential direction of the stator base, the multiple splicing units abut against the cavity wall of the containing cavity in the radial direction of the stator base, and the ends, in the axial direction of the stator base, of the splicing units are supported on the annular supporting face; the annular pressing piece is tightly attached to and fixedly connected with one end, in the axial direction, of the stator base, and the annular pressing piece is pressed at one end, opposite to the annular supporting face, of the splicing unit in the axial direction of the stator base. According to the spliced stator, the plurality of splicing units are limited and fixed by using the stator seat and the annular pressing piece, and the adjacent splicing units do not need to be welded, so that the dimensional accuracy of the spliced stator can be improved.

Description

Technical Field

[0001] This application relates to the field of motor stator technology, and in particular to a modular stator and motor. Background Technology

[0002] Modular stators have advantages such as high slot fill factor, convenient and efficient winding, low coil end, low copper loss, low temperature rise, low cogging torque, and small torque fluctuation.

[0003] In related technologies, the production processes of modular stators mainly include winding, assembling, welding, wiring, binding, shaping, and impregnation. Among these, assembling refers to sequentially joining multiple modular stator units circumferentially to form a circular stator. After assembling, the seams between adjacent units are welded to ensure a secure fixation between the multiple units.

[0004] However, when welding the seams between adjacent splicing units, local temperature and stress changes may occur at the weld, which may cause deformation of the splicing stator at the weld and thus affect the dimensional accuracy of the splicing stator. Utility Model Content

[0005] Therefore, it is necessary to address the problem in the existing modular stator where welding at the joints between adjacent modular units during the production process can cause local temperature and stress changes at the weld joint, which can easily lead to deformation of the modular stator at the weld joint and thus affect the dimensional accuracy of the modular stator. A modular stator and motor should be provided as an example.

[0006] One embodiment of this application provides a modular stator, the modular stator comprising:

[0007] A stator base extends circumferentially to form a receiving cavity, the cavity wall of which includes an annular support surface facing the axial direction of the stator base;

[0008] Multiple splicing units are located within the receiving cavity and are arranged sequentially along the circumference of the stator base. Each splicing unit abuts against the cavity wall of the receiving cavity along the radial direction of the stator base, and one end of each splicing unit along the axial direction of the stator base is supported on the annular support surface.

[0009] An annular clamping member is tightly attached to and fixedly connected to one end of the stator base along the axial direction. The annular clamping member is pressed against one end of the splicing unit facing away from the annular support surface along the axial direction of the stator base.

[0010] In one embodiment, the annular clamping member includes:

[0011] Side ring, the side ring surrounding the outer periphery of the plurality of splicing units, one end of the side ring along the axial direction being fitted with the stator base; and,

[0012] An end ring is connected to the other end of the side ring along the axial direction, and the end ring protrudes radially inward from the side ring along the stator base, so that the end ring is pressed against the end of the splicing unit facing away from the annular support surface along the axial direction of the stator base.

[0013] In one embodiment, the side ring and the end ring are integrally formed.

[0014] In one embodiment, the annular clamping member is provided with a first fixing hole that extends through the axial direction; the stator seat is provided with a second fixing hole corresponding to the first fixing hole at one end facing the annular clamping member;

[0015] The modular stator also includes fasteners, which pass through the first fixing hole and the second fixing hole to fix the annular clamping member to the stator base.

[0016] In one embodiment, the splicing unit is bonded to the cavity wall of the receiving cavity by an adhesive.

[0017] In one embodiment, at least one of the splicing units is provided with a positioning groove on one radially outward side surface of the stator base; the cavity wall of the receiving cavity is provided with at least one positioning key; the positioning key cooperates with the positioning groove.

[0018] In one embodiment, each of the splicing units is provided with the positioning groove on one radially outward side surface of the stator base; the cavity wall of the receiving cavity is provided with a plurality of positioning keys, and the positioning keys are matched with the positioning grooves one by one.

[0019] In one embodiment, the stator base includes an annular bottom wall and an annular side wall, one end of the annular side wall is connected to the annular bottom wall, and the annular side wall is arranged circumferentially around the annular bottom wall so that the annular side wall and the annular bottom wall together form the receiving cavity;

[0020] The inner circumferential surface of the annular sidewall includes a first segment and a second segment connected along the axial direction of the stator seat. The inner diameter of the first segment is larger than the inner diameter of the second segment. The first segment is connected to the outer circumferential edge of the annular support surface, and the second segment is connected to the inner circumferential edge of the annular support surface. The end of the second segment away from the annular support surface is connected to the annular bottom wall.

[0021] In one embodiment, the splicing unit includes:

[0022] A core assembly, the core assembly comprising a yoke and teeth connected to the yoke, the teeth being located inside the yoke along the radial direction of the stator base;

[0023] A coil, the coil being wound around the periphery of the teeth; and

[0024] An insulating structure is disposed between the coil and the iron core assembly;

[0025] Wherein, the yoke abuts against the cavity wall of the receiving cavity along the radial direction of the stator seat; one end of the yoke along the axial direction of the stator seat is supported on the annular support surface, and the annular clamping member is pressed against the other end of the yoke along the axial direction of the stator seat.

[0026] An embodiment of this application also provides an electric motor, including the modular stator of any of the above embodiments.

[0027] The aforementioned modular stator and motor have a stator base extending circumferentially to form a receiving cavity. Multiple splicing units are arranged sequentially along the circumference of the stator base. Since the multiple splicing units are located within the receiving cavity, they abut against the cavity wall along the radial direction of the stator base. This allows the stator base to circumferentially surround and hold the multiple splicing units, limiting their outer circumferential dimensions and ensuring good coaxiality. The cavity wall includes an annular support surface facing the axial direction of the stator base. Because one end of the splicing unit along the axial direction of the stator base is supported by the annular support surface, and an annular clamping member presses against the end of the splicing unit along the axial direction of the stator base facing away from the annular support surface, both ends of the splicing unit along the axial direction of the stator base are clamped by the annular clamping member and the annular support surface, thus limiting the splicing unit's position along the axial direction of the stator base. Because the annular clamping member is tightly attached and fixedly connected to one end of the stator base along the axial direction, the splicing unit is fixed between the annular clamping member and the annular support surface. This not only fixes the axial position of the splicing unit along the stator base but also limits its circumferential and radial position along the stator base, thus ensuring the accuracy of the position and dimensions of multiple splicing units. Therefore, the above-mentioned modular stator, by using the stator base and the annular clamping member to limit and fix multiple splicing units, can achieve good positioning and reliable fixation of multiple splicing units without the need for welding adjacent splicing units, thereby improving the dimensional accuracy of the modular stator.

[0028] Since there is no need to weld adjacent splicing units, the health hazards of glaring lasers and polluting gases caused by welding are avoided. At the same time, the stator scrapping problem caused by improper welding operation or unstable welding equipment is also avoided. Attached Figure Description

[0029] Figure 1This is a cross-sectional schematic diagram of a modular stator according to one embodiment.

[0030] Figure 2 for Figure 1 A schematic diagram of the stator base of the modular stator.

[0031] Figure 3 for Figure 2 A schematic diagram of the connection structure between the middle stator and multiple splicing units.

[0032] Figure 4 This is a schematic diagram of the structure of a splicing unit according to one embodiment.

[0033] Figure 5 This is a schematic diagram of the structure of a core assembly in one embodiment.

[0034] Figure 6 This is a schematic diagram of the connection structure between the iron core assembly and the plastic insulating frame in one embodiment.

[0035] Figure label:

[0036] 100, Stator base; 101, Receiving cavity; 102, Second fixing hole; 110, Annular sidewall; 110a, Annular support surface; 110b, First section; 110c, Second section; 111, Positioning key; 120, Annular bottom wall; 121, Inner hole;

[0037] 200. Splicing unit; 210. Iron core block; 211. Yoke; 211a. Groove; 211b. Protrusion; 212. Tooth; 220. Coil; 230. Insulation structure; 201. Positioning groove;

[0038] 300. Annular clamping element; 301. First fixing hole; 310. Side ring; 320. End ring;

[0039] 400. Fasteners. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "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 based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0042] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In this application, unless otherwise expressly 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.

[0045] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0046] Please refer to Figure 1 One embodiment of this application provides a modular stator, which includes a stator base 100, a plurality of splicing units 200 and an annular clamping member 300.

[0047] refer to Figure 2 The stator base 100 extends around a circumference to form a receiving cavity 101. The cavity wall of the receiving cavity 101 includes an annular support surface 110a, which faces the axial direction of the stator base 100.

[0048] Combined Figure 3 Multiple splicing units 200 are located within the receiving cavity 101, and the multiple splicing units 200 are arranged sequentially along the circumference of the stator base 100. (Reference) Figure 1 and Figure 3 Multiple splicing units 200 abut against the cavity wall of the receiving cavity 101 along the radial direction of the stator base 100. One end of the splicing unit 200 along the axial direction of the stator base 100 is supported on the annular support surface 110a.

[0049] refer to Figure 1 The annular clamping member 300 is tightly attached to and fixedly connected to one end of the stator seat 100 along the axial direction. The annular clamping member 300 is pressed against one end of the splicing unit 200 along the axial direction of the stator seat 100, facing away from the annular support surface 110a.

[0050] The aforementioned modular stator has a stator base 100 extending circumferentially to form a receiving cavity 101. Multiple splicing units 200 are arranged sequentially along the circumference of the stator base 100. Since the multiple splicing units 200 are located within the receiving cavity 101, they abut against the cavity wall of the receiving cavity 101 radially from the stator base 100. This allows the stator base 100 to circumferentially surround and tightly hold the multiple splicing units 200, thus limiting the outer diameter of the multiple splicing units 200 and ensuring good coaxiality. The cavity wall of the receiving cavity 101 includes an annular support surface 110a, which faces the axial direction of the stator base 100. Since one end of the splicing unit 200 along the axial direction of the stator base 100 is supported on the annular support surface 110a, and the annular clamping member 300 is pressed against the end of the splicing unit 200 along the axial direction of the stator base 100 facing away from the annular support surface 110a, both ends of the splicing unit 200 along the axial direction of the stator base 100 are clamped by the annular clamping member 300 and the annular support surface 110a, thereby achieving the limitation of the splicing unit 200 along the axial direction of the stator base 100. Since the annular clamping member 300 is tightly attached to and fixedly connected to one end of the stator base 100 along the axial direction, the splicing unit 200 is fixed between the annular clamping member 300 and the annular support surface 110a. This not only achieves the fixation of the position of the splicing unit 200 along the axial direction of the stator base 100, but also limits the circumferential and radial position of the splicing unit 200 along the stator base 100, thereby fully ensuring the accuracy of the position and size of the multiple splicing units 200. Therefore, the above-mentioned modular stator, by using the stator base 100 and the annular clamping member 300 to limit and fix multiple splicing units 200, can achieve good positioning of multiple splicing units 200 and reliable fixation between them, without the need to weld adjacent splicing units 200, thereby improving the dimensional accuracy of the modular stator.

[0051] Please refer to Figure 1 In one embodiment, the annular clamping member 300 includes a side ring 310 and an end ring 320. The end ring 320 is connected to one axial end of the side ring 310.

[0052] The side ring 310 surrounds the outer periphery of the multiple splicing units 200, and the splicing unit 200 abuts against the inner circumferential surface of the side ring 310 along the radial direction of the stator base 100. The end of the side ring 310 away from the end ring 320 along the axial direction is fitted with the stator base 100. In this way, the side ring 310 and the stator base 100 together surround and hold the periphery of the multiple splicing units 200, realizing the positioning of the splicing unit 200 along the radial direction of the stator base 100.

[0053] The end ring 320 protrudes radially inward from the side ring 310 along the stator base 100, so that the end ring 320 can press against the end of the splicing unit 200 facing away from the annular support surface 110a along the axial direction of the stator base 100, thereby achieving axial positioning of the splicing unit 200.

[0054] Since the splicing unit 200 abuts against the inner circumferential surface of the side ring 310 along the radial direction of the stator seat 100, the side ring 310 can be accurately positioned by fitting it onto multiple splicing units 200, which facilitates the positioning of the annular clamping member 300.

[0055] Optionally, the side ring 310 and the end ring 320 are integrally formed.

[0056] Please refer to Figure 1 In one embodiment, the annular clamping member 300 is provided with a first fixing hole 301 extending axially. Please refer to... Figure 2 and Figure 3 The stator seat 100 has a second fixing hole 102 at one end facing the annular clamping member 300, which corresponds to the first fixing hole 301.

[0057] The modular stator also includes a fastener 400, which passes through the first fixing hole 301 and the fixing hole to fix the annular clamping member 300 to the stator base 100.

[0058] Specifically, the fastener 400 can be a bolt. The second fixing hole 102 can be a threaded hole. The bolt is inserted into the first fixing hole 301 and the second fixing hole 102 in sequence, and is threaded into the second fixing hole 102.

[0059] In this embodiment, fasteners 400 are inserted through the first fixing hole 301 and the second fixing hole 102 to facilitate the fixed connection of the annular clamping member 300 and the stator seat 100.

[0060] In one embodiment, the splicing unit 200 is bonded to the cavity wall of the receiving cavity 101 by an adhesive.

[0061] Specifically, before the splicing unit 200 is placed into the receiving cavity 101, an adhesive can be pre-applied to the cavity wall of the receiving cavity 101 or to the splicing unit 200. After the splicing unit 200 is placed into the corresponding position in the receiving cavity 101, the splicing unit 200 can be bonded to the cavity wall of the receiving cavity 101 using the adhesive.

[0062] In this way, the position of the splicing unit 200 can be further fixed, thereby further ensuring the positional and dimensional accuracy between multiple splicing units 200, and avoiding welding of the splicing unit 200.

[0063] Please combine Figures 2 to 4In one embodiment, the cavity wall of the receiving cavity 101 is provided with at least one positioning key 111. At least one splicing unit 200 is provided with a positioning groove 201 on one radially outward side surface of the stator base 100. The positioning key 111 cooperates with the positioning groove 201.

[0064] The extension direction of the positioning groove 201 and the extension direction of the positioning key 111 are both along the axial direction of the stator base 100. Specifically, the positioning groove 201 passes through the yoke 211 along the axial direction of the stator base 100. Thus, by moving the splicing unit 200 along the axial direction of the stator base 100, the positioning key 111 can be moved into the positioning groove 201.

[0065] By cooperating with the positioning key 111 and the positioning groove 201, the splicing unit 200 can be positioned along the circumference of the stator base 100, further ensuring the positional reliability of the splicing unit 200.

[0066] Please combine Figures 2 to 4 In one embodiment, each splicing unit 200 is provided with a positioning groove 201 on one radially outward side surface of the stator base 100. The cavity wall of the receiving cavity 101 is provided with a plurality of positioning keys 111, which are matched one-to-one with the positioning grooves 201.

[0067] In this way, multiple positioning keys 111 and positioning slots 201 on multiple splicing units 200 can be used to position multiple splicing units 200 separately, thus fully ensuring the positional reliability of the splicing units 200.

[0068] In other embodiments, only one positioning key 111 may be provided on the cavity wall of the receiving cavity 101, and a positioning groove 201 may be provided on only one side surface of the splicing unit 200 along the radially outward side of the stator base 100. During splicing, the splicing unit 200 can be positioned by first engaging the positioning groove 201 with the positioning key 111. Then, the other splicing units 200 can be arranged sequentially along the circumference of the stator base 100, which can also ensure the circumferential positional accuracy among multiple splicing units 200.

[0069] In other embodiments, positioning grooves 201 may be provided on a portion of the splicing units 200, and positioning keys 111 of the same number as the portion may be provided on the cavity wall of the receiving cavity 101. Since the multiple splicing units 200 are arranged sequentially along the circumference of the stator base 100, the positioning of only a portion of the splicing units 200 through the cooperation of the positioning grooves 201 and the positioning keys 111 can still ensure the circumferential positional accuracy among all the splicing units 200.

[0070] Please refer to Figure 1 and Figure 2In one embodiment, the stator base 100 includes an annular bottom wall 120 and an annular side wall 110. One end of the annular side wall 110 is connected to the annular bottom wall 120, and the annular side wall 110 is arranged circumferentially around the annular bottom wall 120 so that the annular side wall 110 and the annular bottom wall 120 together form a receiving cavity 101. The splicing unit 200 abuts against the annular side wall 110 radially along the stator base 100.

[0071] When multiple splicing units 200 are placed into the receiving cavity 101, the inner hole 121 of the annular bottom wall 120 can be fitted onto the positioning mandrel. By keeping the positioning mandrel fixed, the annular bottom wall 120 can be positioned, that is, the stator seat 100 can be positioned, thereby facilitating the assembly of multiple splicing units 200.

[0072] Understandably, the positioning key 111 in the foregoing embodiments can be disposed on the inner circumferential surface of the annular sidewall 110. The second fixing hole 102 can be disposed on the end face of the annular sidewall 110. The annular clamping member 300 can be tightly attached to the end of the annular sidewall 110 away from the annular bottom wall 120.

[0073] Please refer to Figure 1 and Figure 2 In one embodiment, the inner circumferential surface of the annular sidewall 110 includes a first segment 110b and a second segment 110c connected axially along the stator seat 100. The inner diameter of the first segment 110b is larger than the inner diameter of the second segment 110c. The first segment 110b is connected to the outer periphery of the annular support surface 110a, and the second segment 110c is connected to the inner periphery of the annular support surface 110a. One end of the second segment 110c away from the annular support surface 110a is connected to the annular bottom wall 120.

[0074] In this embodiment, since the inner circumferential surface of the annular sidewall 110 includes a first segment 110b and a second segment 110c with different inner diameters, a stepped surface is formed at the connection between the first segment 110b and the second segment 110c, namely the annular support surface 110a.

[0075] Since one end of the yoke 211 along the axial direction of the stator base 100 is supported on the annular support surface 110a, the end of the second segment 110c of the yoke 211 away from the annular support surface 110a is connected to the annular bottom wall 120. Therefore, it can be understood that the yoke 211 is located within the space surrounded by the first segment 110b. The space surrounded by the second segment 110c can be used to accommodate part of the structure of the coil 220 wound on the toothed portion 212, as well as part of the structure of the insulation structure 230.

[0076] Please combine Figure 4 and Figure 5 In one embodiment, the splicing unit 200 includes: iron core block 210, coil 220 and insulation structure 230.

[0077] The core assembly 210 includes a yoke 211 and a toothed portion 212 connected to the yoke 211. The toothed portion 212 is located on the inner side of the yoke 211 along the radial direction of the stator base 100. Specifically, the yoke 211 extends in an arc shape, one end of the toothed portion 212 is connected to the inner surface of the yoke 211 along the radial direction of the stator base 100, and the other end of the toothed portion 212 faces the center of the core assembly stator.

[0078] The coil 220 is wound around the periphery of the toothed portion 212. An insulation structure 230 is disposed between the coil 220 and the core assembly 210 to achieve insulation between the coil 220 and the core assembly 210.

[0079] like Figure 1 As shown, one end of the yoke 211 along the axial direction of the stator base 100 is supported on the annular support surface 110a, and the annular clamping member 300 is clamped to the other end of the yoke 211 along the axial direction of the stator base 100.

[0080] In this embodiment, the core assembly 210 includes a yoke 211 and a toothed portion 212 connected to the yoke 211, since the coil 220 is wound around the toothed portion 212. The yoke 211 is located on the outer side of the toothed portion 212 along the radial direction of the stator base 100. Therefore, the yoke 211 can abut against the cavity wall of the receiving cavity 101 along the radial direction of the stator base 100, and the yoke 211 can be clamped between the annular clamping member 300 and the annular support surface 110a.

[0081] In some embodiments, the insulation structure 230 includes an insulation frame and insulating paper, with the insulating paper located between the insulation frame and the core assembly 210. This enables good insulation between the core assembly 210 and the coil 220.

[0082] Please refer to Figure 6 In other embodiments, the insulating structure 230 may also cover the plastic insulating skeleton of the core module 210. The plastic insulating skeleton is covered onto the surface of the core module 210 by processes such as injection molding or overmolding.

[0083] In other embodiments, the insulation structure 230 may be an insulating coating applied to the core assembly 210.

[0084] Please combine Figures 3 to 5 In one embodiment, the yoke 211 has a groove 211a on one side of the stator base 100 along the circumferential direction, and a protrusion 211b on the other side of the stator base 100 along the circumferential direction.

[0085] In any two adjacent splicing units 200, the protrusion 211b of one splicing unit 200 engages with the groove 211a of the other splicing unit 200.

[0086] In this way, the protrusion 211b and the groove 211a can be used to position two adjacent splicing units 200, further ensuring the positional and dimensional accuracy between multiple splicing units 200.

[0087] An embodiment of this application also provides an electric motor, including the modular stator of any of the above embodiments.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A modular stator, characterized in that, The modular stator includes: A stator base extends circumferentially to form a receiving cavity, the cavity wall of which includes an annular support surface facing the axial direction of the stator base; Multiple splicing units are located within the receiving cavity and are arranged sequentially along the circumference of the stator base. Each splicing unit abuts against the cavity wall of the receiving cavity along the radial direction of the stator base, and one end of each splicing unit along the axial direction of the stator base is supported on the annular support surface. An annular clamping member is tightly attached to and fixedly connected to one end of the stator base along the axial direction. The annular clamping member is pressed against one end of the splicing unit facing away from the annular support surface along the axial direction of the stator base.

2. The modular stator according to claim 1, characterized in that, The annular clamping element includes: Side ring, the side ring surrounding the outer periphery of the plurality of splicing units, one end of the side ring along the axial direction being fitted with the stator base; and, An end ring is connected to the other end of the side ring along the axial direction, and the end ring protrudes radially inward from the side ring along the stator base, so that the end ring is pressed against the end of the splicing unit facing away from the annular support surface along the axial direction of the stator base.

3. The modular stator according to claim 2, characterized in that, The side ring and the end ring are integrally formed.

4. The modular stator according to claim 1, characterized in that, The annular clamping member is provided with a first fixing hole that extends through the axial direction; the stator seat is provided with a second fixing hole corresponding to the first fixing hole at one end facing the annular clamping member; The modular stator also includes fasteners, which pass through the first fixing hole and the second fixing hole to fix the annular clamping member to the stator base.

5. The modular stator according to claim 1, characterized in that, The splicing unit is bonded to the cavity wall of the receiving cavity by an adhesive.

6. The modular stator according to claim 1, characterized in that, At least one of the splicing units is provided with a positioning groove on one radially outward side surface of the stator base; the cavity wall of the receiving cavity is provided with at least one positioning key; the positioning key cooperates with the positioning groove.

7. The modular stator according to claim 6, characterized in that, Each of the splicing units has a positioning groove on one radially outward side surface of the stator base; the cavity wall of the receiving cavity has a plurality of positioning keys, and the positioning keys are matched with the positioning grooves one by one.

8. The modular stator according to claim 1, characterized in that, The stator base includes an annular bottom wall and an annular side wall. One end of the annular side wall is connected to the annular bottom wall. The annular side wall is arranged around the annular bottom wall in a circumferential manner so that the annular side wall and the annular bottom wall together form the receiving cavity. The inner circumferential surface of the annular sidewall includes a first segment and a second segment connected along the axial direction of the stator seat. The inner diameter of the first segment is larger than the inner diameter of the second segment. The first segment is connected to the outer circumferential edge of the annular support surface, and the second segment is connected to the inner circumferential edge of the annular support surface. The end of the second segment away from the annular support surface is connected to the annular bottom wall.

9. The modular stator according to claim 1, characterized in that, The splicing unit includes: A core assembly, the core assembly comprising a yoke and teeth connected to the yoke, the teeth being located inside the yoke along the radial direction of the stator base; A coil, the coil being wound around the periphery of the teeth; and An insulating structure is disposed between the coil and the iron core assembly; Wherein, the yoke abuts against the cavity wall of the receiving cavity along the radial direction of the stator seat; one end of the yoke along the axial direction of the stator seat is supported on the annular support surface, and the annular clamping member is pressed against the other end of the yoke along the axial direction of the stator seat.

10. An electric motor, characterized in that, Includes the modular stator as described in any one of claims 1-9.

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