Stator assembly and disc motor

Abstract

This utility model discloses a stator assembly and a disc motor. The stator assembly includes a stator module, which comprises a stator assembly, an inner ring housing, an outer ring housing, an oil sealing plate, and multiple fastening components. The stator assembly includes multiple iron core blocks, multiple stator windings, and an injection-molded plate. Each iron core block and the injection-molded plate are integrally connected by injection molding. The inner ring housing is located within the ring of the stator assembly; the outer ring housing is located around the periphery of the stator assembly. The oil sealing plate has multiple channels corresponding to each iron core block, and the oil sealing plate is connected and fixed to the inner ring housing and the outer ring housing respectively. The fastening components connect and fix the oil sealing plate and the corresponding iron core block. The fastening components of this utility model help to transfer the unilateral magnetic pull force borne by the iron core block to the oil sealing plate, and then to the inner ring housing and the outer ring housing through the oil sealing plate. With the help of the relatively more stable inner ring housing and outer ring housing, the vibration caused by the unilateral magnetic pull force on the iron core block is reduced or eliminated as much as possible, thereby helping to improve the overall operating performance.

Description

Technical Field

[0001] This utility model relates to the field of disc motor technology, specifically to a stator assembly and a disc motor. Background Technology

[0002] The magnetic field inside a disc motor is axial, so the entire machine is generally flat. For disc motors, the core is usually made of silicon steel sheets, amorphous alloys, powder metallurgy, and other types of magnetic alloy materials.

[0003] Disc motor cores are divided into integral cores and segmented cores. For most disc motors with intermediate single stators, the stator core is segmented, meaning that the core unit for each tooth is separate, and the entire stator core is composed of many separate, independent cores.

[0004] A yokeless stator core design has been developed, which eliminates the stator yoke found in traditional stator cores. As an alternative, the segmented stator core with a yokeless design is typically injection molded with a composite matrix. When this yokeless stator core is applied to a disc motor, whether it's a single-rotor single-stator motor or a dual-rotor single-stator motor, the segmented core will experience magnetic pull on at least one side during operation. Taking unilateral magnetic pull as an example, this unilateral magnetic pull is positively correlated with the air gap eccentricity and magnetic flux density, and will induce stator core vibration through magneto-solid coupling. This vibration may be transmitted to the overall motor structure, exacerbating noise and mechanical wear. Utility Model Content

[0005] The main purpose of this utility model is to propose a stator assembly and a disc motor, which aims to solve the problem of adverse effects on the whole machine caused by magnetic pull in traditional motors.

[0006] To achieve the above objectives, this utility model proposes a stator assembly, including a stator module, wherein the stator module includes:

[0007] The stator assembly includes multiple iron core blocks, multiple stator windings, and an injection-molded plate arranged in a ring at one axial end of each iron core block. The iron core blocks are arranged sequentially at intervals along the circumference of the injection-molded plate and are integrally connected to the injection-molded plate by injection molding. Each stator winding is wound around the periphery of each iron core block in a corresponding manner.

[0008] The inner ring housing is located within the ring of the stator assembly;

[0009] The outer casing is arranged around the periphery of the stator assembly;

[0010] An oil sealing plate, arranged in a ring shape at the other axial end of each of the iron core blocks, and having multiple channels corresponding to each iron core block, the channels allowing the corresponding iron core blocks to pass through, thereby confining each stator winding between the oil sealing plate and the injection molding plate; the oil sealing plate respectively connects and fixes the inner ring housing and the outer ring housing; and...

[0011] Multiple fastening components are respectively disposed on at least one radial side of each of the iron core blocks, and the fastening components connect and fix the oil sealing plate and the corresponding iron core block.

[0012] Optionally, one of the fastening components and the corresponding iron core block has a locking protrusion, and the other has a locking groove, with the locking protrusion and the locking groove engaging and fixing.

[0013] Optionally, after being secured with the corresponding iron core block, the fastening component is supported on the oil sealing plate at the part exposed outside the iron core block and is bonded and fixed to the oil sealing plate.

[0014] Optionally, the fastening component includes a first fastening section disposed on the radially inner or radially outer side of the corresponding iron core block, and two second fastening sections respectively connected to the circumferential ends of the first fastening section. The second fastening sections extend radially toward the iron core block and abut against the circumferential sidewall of the iron core block.

[0015] Optionally, all the fastening components are uniformly arranged on the same radial side of each of the iron core blocks;

[0016] The two second fastening segments between each pair of adjacent fastening components abut against each other, such that the fastening components are sequentially connected in a circumferential ring.

[0017] Optionally, each of the fastening components includes:

[0018] Multiple first fastening components are respectively disposed on the radial outer side of each of the said iron core blocks; and,

[0019] Multiple second fastening components are arranged one-to-one on the radial inner side of each of the iron core blocks.

[0020] Optionally, the radial orthographic projections of the first fastening member and the second fastening member corresponding to the same core block at least partially overlap.

[0021] Optionally, the shaft end surface of the outer ring housing and / or the inner ring housing is recessed at a position radially close to the stator assembly, and the oil sealing plate is snapped and fixed to the step.

[0022] Optionally, there are two stator modules, and the oil sealing plates of the two stator modules are bonded and fixed along the axial direction.

[0023] In addition, to achieve the above objectives, this utility model also provides a disc motor, including the stator assembly as described above.

[0024] In the technical solution provided by this utility model, the stator assembly can achieve a yokeless design through injection molding of iron core blocks and injection plates, which helps to reduce material consumption and optimize magnetic circuit efficiency, enhance torque density, and reduce copper loss and iron loss to a certain extent, thereby optimizing the overall electromagnetic performance.

[0025] Further strengthening the connection between the oil sealing plate and the core block through fastening components makes the connection between the stator assembly, oil sealing plate, inner ring housing, and outer ring housing more stable, thereby improving the overall assembly strength of the stator assembly. In addition, the fastening components help transfer the unilateral magnetic pull force on the core block to the oil sealing plate, and then through the oil sealing plate to the inner and outer ring housings. The relatively more stable inner and outer ring housings help to minimize or eliminate the adverse vibration caused by the unilateral magnetic pull force on the core block, thus contributing to improved overall operating performance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 A perspective view of an embodiment of the stator assembly provided by this utility model;

[0028] Figure 2 for Figure 1 Exploded view of the main structure of the middle stator assembly;

[0029] Figure 3 for Figure 1 A schematic cross-sectional view of the middle stator assembly along the axial direction;

[0030] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0031] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0032] Figure 6 for Figure 2 A schematic diagram showing the main structural breakdown of the middle stator module;

[0033] Figure 7 for Figure 6 A three-dimensional schematic diagram of the middle stator group after the stator windings have been removed;

[0034] Figure 8 for Figure 7 A schematic cross-sectional view of the middle stator assembly along the axial direction;

[0035] Figure 9 for Figure 6 A three-dimensional schematic diagram of the first and second fastening components.

[0036] Explanation of icon numbers:

[0037] 1. Stator module; 100. Stator assembly; 110. Core block; 120. Stator winding; 130. Injection molded plate; 140. Injection molded outer shell; 141. First slot; 142. Second slot; 200. Inner ring shell; 300. Outer ring shell; 310. Step; 400. Oil sealing plate; 410. Channel; 501. First fastening component; 502. Second fastening component; 510. First fastening section; 511. Protrusion; 520. Second fastening section.

[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] Please see Figures 1 to 9 This utility model provides a stator assembly and an applicable disc motor thereof.

[0043] It should be noted that the stator assembly and the disc motors to which it is applied are generally configured to have uniform relative directions such as axial, circumferential, radial, and tangential. Among them, the axial direction generally refers to the extension direction of the spindle of the disc motor.

[0044] Disc motors generally also include a rotor assembly. Depending on the actual needs, a disc motor can be configured as a single-rotor, single-stator motor. In this case, the disc motor has a built-in stator assembly and a rotor assembly, which are arranged side by side along the axial direction.

[0045] Or such as Figures 1 to 5 As shown, the disc motor can be configured as a single-stator dual-rotor motor. In this case, the disc motor has a built-in stator assembly and two rotor units. The two rotor units are located on opposite sides of the stator assembly along the axial direction, and the three are arranged side by side along the axial direction.

[0046] Therefore, please combine the specific details. Figures 4 to 9 The stator assembly provided by this utility model includes a stator module 1. The stator module 1 includes a stator assembly 100, an inner ring housing 200, an outer ring housing 300, an oil sealing plate 400, and multiple fastening components.

[0047] The stator assembly 100 includes multiple core blocks 110, multiple stator windings 120, and an injection-molded plate 130 arranged in a ring at one axial end of each core block 110. The core blocks 110 are arranged sequentially at intervals along the circumference of the injection-molded plate 130 and are integrally connected to the injection-molded plate 130 via injection molding. Each stator winding 120 is wound around the periphery of each core block 110 in a corresponding manner.

[0048] It is understood that the stator core in this application features a yokeless design. That is, the core block 110 of this application constitutes the stator teeth of a conventional stator core, but no additional stator yoke is designed. This simplifies the overall structure of the stator assembly and reduces the overall machining difficulty of the motor. Furthermore, it facilitates winding, saves core material, reduces motor weight, and increases torque density.

[0049] Each core block 110 is generally arranged in a fan shape or trapezoidal shape. The core blocks 110 are arranged sequentially at intervals around the circumference of the injection-molded plate 130. The gaps between every two adjacent core blocks 110 form a slot structure. The material used to make a single core block 110 can be, but is not limited to, silicon steel sheet, soft magnetic powder SMC, or magnetically conductive solid iron.

[0050] The injection molding plate 130 is disposed on the same side of the axial direction of each iron core block 110. Depending on the actual needs, the material of the injection molding plate 130 can be, but is not limited to, high-performance engineering plastics such as PPS (polyphenylene sulfide), PPA (high-temperature nylon), and PBT (polybutylene terephthalate); thermosetting resin composite materials such as epoxy resin / unsaturated polyester resin; injection molded ferrite (PA + magnetic powder) or PEEK (polyether ether ketone), etc.

[0051] In this application, the injection molding plate 130 can be injection molded. Generally, an insulating layer can first be provided on the outer side of each core block 110. For example, insulating paper can be wrapped around the outer side of each core block 110. Then, an injection molding operation is performed, so that each core block 110 is firmly connected to the injection molding plate 130. At this time, an injection-molded outer shell 140 integral with the injection molding plate 130 is formed on the outer periphery of each core block 110. Specifically, as shown... Figure 8 As shown, the injection-molded outer shell 140 and the injection-molded plate 130 are basically injection-molded as one piece. Moreover, the injection-molded outer shell 140 and the injection-molded plate 130 together cover almost the entire outer surface of the iron core block 110.

[0052] The inner ring housing 200 is disposed within the stator assembly 100. The outer ring housing 300 is disposed around the periphery of the stator assembly 100. The inner ring housing 200, the outer ring housing 300, and the injection molded plate 130 can be fastened together by means of screws, for example.

[0053] The oil sealing plate 400 is arranged in a ring at the other end of the axial direction of each iron core block 110. That is, the oil sealing plate 400 and the injection molded plate 130 are respectively arranged at the two ends of the axial direction of each iron core block 110 and each stator winding 120.

[0054] Each oil sealing plate 400 has multiple channels 410 corresponding to each iron core block 110. The shape and size of the channels 410 are adapted to the iron core blocks 110. Thus, during assembly, the channels 410 allow the corresponding iron core blocks 110 to pass through, thereby enabling basic limiting and positioning of the iron core blocks 110.

[0055] After assembly, the oil sealing plate 400, inner ring housing 200, and outer ring housing 300 can be securely connected. They can then be further secured using, for example, screws. Thus, the oil sealing plate 400, injection molded plate 130, inner ring housing 200, and outer ring housing 300 together enclose and define an annular mounting space. This annular mounting space can accommodate each core block 110 and each stator winding 120. Furthermore, this annular mounting space allows for the flow of, for example, oil. During the oil flow, it carries away heat concentrated at the core block 110 and stator winding 120, achieving cooling of the stator assembly.

[0056] As can be seen from the above, there is no direct connection between the oil sealing plate 400 and the core block 110. Therefore, in a further embodiment, multiple fastening components are correspondingly arranged on at least one radial side of each core block 110. The fastening components connect and fix the oil sealing plate 400 and the corresponding core block 110. The fastening components thus establish a direct connection between the oil sealing plate 400 and the stator assembly 100. This allows for a more direct connection between the outer ring housing 300, the oil sealing plate 400, the fastening components, and the core block 110.

[0057] In the technical solution provided by this utility model, the stator assembly 100 can achieve a yokeless design through the injection molding of the iron core block 110 and the injection plate 130, which helps to reduce material consumption and optimize magnetic circuit efficiency, enhance torque density, and reduce copper loss and iron loss to a certain extent, thereby optimizing the overall electromagnetic performance.

[0058] Furthermore, by strengthening the direct connection between the oil sealing plate 400 and the core block 110 through fastening components, the stator assembly 100, oil sealing plate 400, inner ring housing 200, and outer ring housing 300 are more firmly connected, thereby improving the overall assembly strength of the stator assembly. In addition, the fastening components help to transfer the unilateral magnetic pull force borne by the core block 110 to the oil sealing plate 400, and then through the oil sealing plate 400 to the inner ring housing 200 and outer ring housing 300. With the relatively more stable inner ring housing 200 and outer ring housing 300, the adverse vibration caused by the unilateral magnetic pull force on the core block 110 is reduced or eliminated as much as possible, thereby helping to improve the overall operating performance.

[0059] As can be seen from the above, the fastening components and the iron core blocks 110 are correspondingly provided. That is, it can be understood that each iron core block 110 is provided with at least one fastening component. In this way, it can be ensured that each iron core block 110 and the oil sealing plate 400 form a direct and more secure connection.

[0060] The fastening component can be located at any suitable position on the core block 110. For example, it can be located on at least one side of the core block 110 in the circumferential direction. However, obviously, in order to prevent the fastening component from causing too much interference to the winding of the stator winding 120, the fastening component is more preferably located on at least one side of the core block 110 in the radial direction. That is, the fastening component can be located on the radial inner side and / or the radial outer side of the core block 110.

[0061] For ease of understanding, in the following embodiments, each fastening component located on the radially outer side of the core block 110 is designated as a first fastening component 501. Each fastening component located on the radially inner side of the core block 110 is designated as a second fastening component 502.

[0062] So if Figures 3 to 9 As shown, the first fastening component 501 and the second fastening component 502 can be provided simultaneously. Each first fastening component 501 corresponds to each core block 110. The shape and size of the first fastening component 501 are specifically designed and adjusted to suit the radial outer end of the core block 110. Each second fastening component corresponds to each core block 110. The shape and size of the second fastening component 502 are specifically designed and adjusted to suit the radial inner end of the core block 110.

[0063] Of course, the axial thicknesses of the first fastening component 501 and the second fastening component 502 can be set to be the same or nearly the same. Alternatively, depending on actual needs, the axial thicknesses of the first fastening component 501 and the second fastening component 502 can be set to be different. For example, when it is necessary to form different connection strengths at the radial ends of the core block 110 using the first fastening component 501 and the second fastening component 502 respectively, it is possible to choose to set the axial thicknesses of the first fastening component 501 and the second fastening component 502 to be different.

[0064] Similarly, the first fastening component 501 and the second fastening component 502 can be made of the same or nearly the same material. Alternatively, depending on actual needs, the first fastening component 501 and the second fastening component 502 can be made of different materials. Different materials may result in different structural strengths and different force transmission methods.

[0065] However, in order to facilitate the forming of the first fastening component 501 and the second fastening component 502, the first fastening component 501 and the second fastening component 502 are generally set to have the same or nearly the same structural parameters, except for the structural parameters related to the adaptation and connection with the iron core block 110.

[0066] When the first fastening component 501 and the second fastening component 502 are provided simultaneously as described above, for the same core block 110, the radial orthogonal projections of the first fastening component 501 and the second fastening component 502 can be completely misaligned. Specifically, for example, the axial heights of the parts where the oil sealing plate 400 connects to the first fastening component 501 and the parts where the oil sealing plate 400 connects to the second fastening component 502 are inconsistent. This results in the first fastening component 501 and the second fastening component 502 having different axial heights.

[0067] However, ideally, for the same core block 110, the radial orthographic projections of the first fastening member 501 and the second fastening member 502 should at least partially overlap. Preferably, the radial orthographic projections of the first fastening member 501 and the second fastening member 502 should completely overlap. This ensures that the transmission of force on both radial sides of the core block 110 is as balanced and consistent as possible.

[0068] Based on one or more of the above embodiments, the fastening component and the corresponding iron core block 110 are connected and fixed. The connection method between the two is not limited; it can be, but is not limited to, a detachable or non-detachable connection. The detachable connection method can be one or more of the following: screw fastening, snap-fit ​​fastening, adhesive fastening, etc.

[0069] Specifically, such as Figures 1 to 9 In the structure shown, one of the fastening components and the corresponding iron core block 110 has a latching protrusion 511, and the other has a latching groove. The latching protrusion 511 and the latching groove are engaged and fixed. That is, the fastening component and the corresponding iron core block 110 can be engaged and fixed by a convex-concave fitting.

[0070] Next, after being secured to the corresponding iron core block 110, the fastening component, exposed outside the iron core block 110, rests on the oil sealing plate 400 and is connected and secured to the oil sealing plate 400. Similarly, the connection method between the fastening component and the oil sealing plate 400 is not limited; it can be, but is not limited to, a detachable or non-detachable connection. The detachable connection method can be one or more of the following: screw fastening, snap-fit ​​fastening, adhesive fastening, etc.

[0071] In one specific solution, after the fastening component and the corresponding iron core block 110 are held and fixed by the snap-fit ​​protrusion 511 and the snap-fit ​​groove, the fastening component exposed outside the iron core block 110 can be further glued and fixed to the oil sealing plate 400 by adhesive, making the entire stator assembly easier to manufacture and form.

[0072] At this point, the protrusion 511 and the slot can be securely fastened by a size-matched fit. That is, at least a portion of the protrusion 511 is slightly larger than the corresponding portion of the slot, allowing for a secure connection primarily through an interference fit, supplemented by adhesive. Alternatively, the protrusion 511 and the slot can be roughly positioned and limited by an insertion, ensuring the fastening components and the iron core block 110 are roughly accurately positioned, and then further secured by adhesive.

[0073] In practical applications, the fastening components can be specifically configured with a locking protrusion 511, and the core block 110 can be provided with a locking groove. When both the first fastening component 501 and the second fastening component 502 are provided as described above, a first locking groove 141 can be formed at the radially outer end of the core block 110. The first locking groove 141 and the locking protrusion 511 of the first fastening component 501 are engaged and fixed. A second locking groove 142 is formed at the radially inner end of the core block 110. The second locking groove 142 and the locking protrusion 511 of the second fastening component 502 are engaged and fixed.

[0074] Based on this, specifically, such as Figure 5 , Figure 8 and Figure 9 As shown, the fastening component includes a first fastening section 510 disposed on the radially inner or radially outer side of the corresponding core block 110, and two second fastening sections 520 respectively connected to the circumferential ends of the first fastening section 510. The second fastening sections 520 extend radially toward the core block 110 and abut against the circumferential sidewall of the core block 110. That is, the fastening component roughly forms a U-shaped structure through one first fastening section 510 and two second fastening sections 520. The U-shaped design allows the fastening component to not only be inserted into the radially inner or radially outer end of the core block 110, but also to a certain extent to properly wrap around the circumference of the core block 110, thereby ensuring a stable connection between the fastening component and the core block 110.

[0075] The locking protrusion 511 is mainly located at the first fastening section 510. Specifically, the locking protrusion 511 can be formed on the side of the first fastening section 510 facing the iron core block 110. Alternatively, the entire first fastening section 510 can be used as the locking protrusion 511.

[0076] In practical applications, the fastening components can be located on different sides of different core blocks 110. For example, a second fastening component 502 is provided on the radially inner side of some core blocks 110, and a first fastening component 501 is provided on the radially outer side of the remaining core blocks 110.

[0077] However, when, as described above, a first fastening member 501 is uniformly provided on the radially outer side of each core block 110; and / or a second fastening member 502 is uniformly provided on the radially inner side of each core block 110: the two adjacent second fastening segments 520 between every two adjacent first fastening members 501 abut against each other, so that each first fastening member 501 abuts against each other sequentially in the circumferential direction and is assembled to form a complete ring structure. Similarly, the two adjacent second fastening segments 520 between every two adjacent second fastening members 502 abut against each other, so that each second fastening member 502 abuts against each other sequentially in the circumferential direction and is assembled to form a complete ring structure.

[0078] In this way, the various first fastening components 501 and / or the various second fastening components 502 can abut against each other in the circumferential direction, forming a structural support. Ultimately, this contributes to a more secure connection between the overall fastening components, the core block 110, and the sealing plate 400.

[0079] Furthermore, given the above, the oil sealing plate 400 directly abuts against the outer ring housing 300, and / or the oil sealing plate 400 directly abuts against the inner ring housing 200. Taking the oil sealing plate 400 and the outer ring housing 300 as an example, the outer radial edge of the oil sealing plate 400 and the inner radial edge of the outer ring housing 300 can abut face-to-face. Alternatively, the shaft end surface of the outer ring housing 300 can be recessed with a step 310 at a radial position close to the stator assembly 100. The outer radial section of the oil sealing plate 400 overlaps this step 310 and achieves a concave-convex fit with it. This means that after assembly, the shaft end surface of the oil sealing plate 400 and the shaft end surface of the outer ring housing 300 are approximately flush and on the same plane.

[0080] Similarly, for the oil sealing plate 400 and the inner ring housing 200, the inner radial edge of the oil sealing plate 400 and the outer radial edge of the inner ring housing 200 can be in direct contact. Alternatively, the shaft end surface of the inner ring housing 200 can be recessed with a step 310 at a radial position near the stator assembly 100. The inner radial section of the oil sealing plate 400 overlaps this step 310 and achieves a concave-convex fit with it. This means that after assembly, the shaft end surface of the oil sealing plate 400 and the shaft end surface of the inner ring housing 200 are approximately flush and on the same plane.

[0081] Thus, the structure of step 310 ensures a more stable contact between the oil sealing plate 400 and the outer ring housing 300, and between the oil sealing plate 400 and the inner ring housing 200. It also helps to transfer, for example, unilateral magnetic pull forces experienced at the stator assembly 100 to the outer ring housing 300 and / or the inner ring housing 200 via step 310. The more stable structural features of the outer ring housing 300 and / or the inner ring housing 200 themselves ensure smooth operation of the stator assembly 100.

[0082] It should be noted that when the stator assembly is applied to a disc motor, the stator assembly in any of the above embodiments may include only one stator module 1.

[0083] Alternatively, depending on actual needs, the stator assembly in any of the above embodiments may include two stator modules 1. Each of the two stator modules 1 may independently have an inner ring housing 200 and an outer ring housing 300. That is, after assembly, the two outer ring housings 300 of the two stator modules 1 are axially connected. The two inner ring housings 200 of the two stator modules 1 are axially connected.

[0084] Of course, the two stator modules 1 can also share the same inner ring housing 200 and outer ring housing 300. That is, after assembly, the same inner ring housing 200 is assembled within the ring of the two stator assemblies 100. The same outer ring housing 300 surrounds the outer periphery of the two stator assemblies 100.

[0085] Apart from the inner ring housing 200 and outer ring housing 300, the two stator modules 1 generally have two components each. That is, the stator assembly 100, the oil sealing plate 400, and the fastening components are generally set in two sets. The assembly between the two stator modules 1 can be finally achieved by bonding and fixing the two oil sealing plates 400 of the two stator modules 1 axially.

[0086] At this point, the two oil sealing plates 400 can serve as oil sealing structures for the two annular empty areas in the two stator modules 1. This means that cooling oil can circulate independently within the two annular empty areas. Furthermore, a connecting oil passage can be defined between the two oil sealing plates 400, which extends radially and connects the two annular empty areas.

[0087] It is understandable that the above-mentioned two stator modules 1 constitute a double-layer stator group 100 for the same disc motor. This helps to minimize the difficulty of core fabrication and stator winding 120 winding within a limited space, ultimately contributing to the optimization of the overall performance of the disc motor.

[0088] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A stator assembly characterized by, Includes a stator module, the stator module comprising: The stator assembly includes multiple iron core blocks, multiple stator windings, and an injection-molded plate arranged in a ring at one axial end of each iron core block. The iron core blocks are arranged sequentially at intervals along the circumference of the injection-molded plate and are integrally connected to the injection-molded plate by injection molding. Each stator winding is wound around the periphery of each iron core block in a corresponding manner. The inner ring housing is located within the ring of the stator assembly; The outer casing is arranged around the periphery of the stator assembly; An oil sealing plate, arranged in a ring shape at the other axial end of each of the iron core blocks, and having multiple channels corresponding to each iron core block, the channels allowing the corresponding iron core blocks to pass through, thereby confining each stator winding between the oil sealing plate and the injection molding plate; the oil sealing plate respectively connects and fixes the inner ring housing and the outer ring housing; and... Multiple fastening components are respectively disposed on at least one radial side of each of the iron core blocks, and the fastening components connect and fix the oil sealing plate and the corresponding iron core block.

2. The stator assembly of claim 1, wherein, One of the fastening components and the corresponding iron core block has a locking protrusion, and the other has a locking groove. The locking protrusion and the locking groove are locked and fixed.

3. The stator assembly of claim 2, wherein, After being secured with the corresponding iron core block, the fastening component, located outside the iron core block, is supported on the oil sealing plate and is bonded and fixed to the oil sealing plate.

4. The stator assembly of claim 1, wherein, The fastening component includes a first fastening section disposed on the radially inner or radially outer side of the corresponding iron core block, and two second fastening sections respectively connected to the circumferential ends of the first fastening section. The second fastening sections extend radially toward the iron core block and abut against the circumferential sidewall of the iron core block.

5. The stator assembly of claim 4, wherein, All of the fastening components are uniformly arranged on the same radial side of each of the iron core blocks; The two second fastening segments between each pair of adjacent fastening components abut against each other, such that the fastening components are sequentially connected in a circumferential ring.

6. The stator assembly of any one of claims 1 to 5, wherein, Each of the fastening components includes: Multiple first fastening components are respectively disposed on the radial outer side of each of the said iron core blocks; and, Multiple second fastening components are arranged one-to-one on the radial inner side of each of the iron core blocks.

7. The stator assembly of claim 6, wherein, The radial orthogonal projections of the first fastening component and the second fastening component corresponding to the same iron core block at least partially overlap.

8. The stator assembly of claim 1, wherein, The shaft end surfaces of the outer ring housing and / or the inner ring housing are recessed with a step at a position close to the stator assembly in the radial direction, and the oil sealing plate is snapped and fixed to the step.

9. The stator assembly of any one of claims 1 to 8, wherein, The stator module is provided in two parts, and the oil sealing plates of the two stator modules are bonded and fixed along the axial direction.

10. A disc-type motor characterized by comprising: Includes the stator assembly as described in any one of claims 1 to 9.

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