Stator assembly and disc type motor

Abstract

The utility model provides a stator assembly and a disc type motor, the stator assembly comprises a stator assembly, a winding assembly and an insulation assembly, and the stator assembly comprises a plurality of stator teeth in an annular array; the winding assembly comprises a coil which is independently wound on the periphery of each stator tooth; the insulation assembly comprises an axial insulation part and a radial insulation part, the axial insulation part is arranged on the stator teeth in a sleeving mode and attached to the axial end face of the coil, and the radial insulation part is attached to the radial surface of the stator teeth so as to insulate the inner side surface of the coil from making contact with the stator teeth. According to the coil framework, the axial insulating part and the radial insulating part are combined and can be separated, interference of the axial insulating part on assembling of the preformed coil is effectively avoided, and compared with a coil framework in the prior art, the design scheme improves flexibility and efficiency of coil installation while maintaining insulating performance.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a stator assembly and a disc-type motor. Background Art

[0002] Axial magnetic field motors, also known as disc motors, have the advantages of small axial size, high torque density, high power density and high efficiency, and are widely used in electric vehicles, general industry, household appliances and other fields. The stator of an axial magnetic field motor is generally composed of an iron core, a coil and a coil frame. For example, the application number is CN202210211378.0, and the patent name is an invention patent for an axial magnetic field motor and its stator, wherein the iron core includes a plurality of stator teeth arranged at circumferential intervals, and a stator tooth slot is formed between two adjacent stator teeth. The coil frame with the coil wound is sleeved on the stator teeth to keep the coil wound by copper wire in the stator tooth slot.

[0003] The coil frame is made of insulating material to insulate the coil and the stator teeth to prevent the coil from contacting the stator teeth and causing an electrical short circuit. However, the coil frame occupies the space of the stator tooth slots. When the sleeve thickness of the coil frame is thicker, the space of the stator tooth slots is reduced, limiting the size and number of turns of the coil. In addition, the coil frame cannot be surrounded by a pre-formed copper coil due to the limitations of the baffles at both ends of the axial direction. Utility Model Content

[0004] Based on this, the purpose of the present utility model is to provide a stator assembly and a disc motor to solve the technical problems mentioned in the above background technology.

[0005] On one hand, the utility model provides a stator assembly, comprising:

[0006] a stator assembly comprising a plurality of stator teeth in an annular array;

[0007] A winding assembly, the winding assembly comprising a coil individually wound around the periphery of each stator tooth;

[0008] The insulating component includes an axial insulating member and a radial insulating member. The axial insulating member is sleeved on the stator teeth and affixed to the axial end surface of the coil. The radial insulating member is affixed to the radial surface of the stator teeth to insulate the inner surface of the coil from contacting the stator teeth.

[0009] Furthermore, in the stator assembly, the axial insulating member includes an inner ring, an outer ring, and a plurality of connecting segments connecting the inner ring and the outer ring, the plurality of connecting segments are arranged circumferentially at intervals, and a positioning hole for cooperating with the stator teeth is formed between two adjacent connecting segments.

[0010] Furthermore, the stator assembly further comprises an inner shell, an outer shell and a stator plate connecting the two, a stator cavity is formed between the inner shell and the outer shell, a plurality of stator teeth are arranged on the stator plate and located in the stator cavity, an inner insulating ring is provided on the surface of the inner shell located in the stator cavity, and an outer insulating ring is provided on the surface of the outer shell located in the stator cavity.

[0011] Furthermore, the stator assembly, wherein the inner peripheral surface of the shell is concave to form a drainage channel, the outer insulating ring is provided with a plurality of liquid outlets connected to the drainage channel, and the outer peripheral surface of the shell is provided with a first inlet and a second inlet and a second inlet connected to the drainage channel.

[0012] Furthermore, in the stator assembly, the liquid outlet holes are arranged in a one-to-one correspondence with the stator teeth.

[0013] Furthermore, in the stator assembly, pole shoes are respectively provided at both axial ends of the stator teeth, and the stator plate is provided with slots that cooperate with the pole shoes. The pole shoes cooperate with the slots to fix the stator teeth on the stator plate.

[0014] Furthermore, in the stator assembly, the axial insulating member comprises a plurality of axial insulator plates arranged in sequence along the circumferential direction of the inner shell, and the axial insulator plates are provided with one or more positioning holes that cooperate with the stator teeth.

[0015] Furthermore, in the stator assembly, the radial insulating member is insulating paper attached to the radial surface of the stator teeth.

[0016] Another aspect of the utility model provides a disc-type motor, comprising the stator assembly described in the above technical solution.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. By adopting a combination of axial insulating parts and radial insulating parts and making them separable, the interference of the axial insulating parts on the assembly of the preformed coil is effectively avoided. Compared with the coil frame in the prior art, this design scheme improves the flexibility and efficiency of coil installation while maintaining the insulation performance.

[0019] 2. The radial insulation is the insulating paper attached to the radial surface of the stator teeth, which takes up almost no space in the stator tooth slots, so that the stator teeth can accommodate coils of larger size or more turns, which effectively guarantees the electromagnetic performance design of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the stator assembly in the first embodiment of the utility model;

[0021] Figure 2 A cross-sectional view of a stator tooth in the first embodiment of the utility model;

[0022] Figure 3 It is an assembly diagram between the axial insulating member and the stator teeth in the first embodiment of the utility model;

[0023] Figure 4 It is an assembly diagram between the radial insulating member and the stator teeth in the first embodiment of the utility model;

[0024] Figure 5 This is a structural diagram of the axial insulating member in the first embodiment of the utility model;

[0025] Figure 6 This is an assembly diagram of the stator teeth in the stator cavity in the first embodiment of the utility model;

[0026] Figure 7 This is an assembly diagram of the outer insulating ring and the outer shell in the first embodiment of the utility model;

[0027] Figure 8 This is a schematic diagram of the specific structure of the stator teeth in the first embodiment of the utility model;

[0028] Fig. 9 It is an assembly diagram between the axial insulating member and the stator teeth in the second embodiment of the utility model;

[0029] Fig.10 This is a structural diagram of the axial insulating member in the second embodiment of the utility model;

[0030] Fig.11 This is a structural diagram of the axial insulating member in the second embodiment of the utility model;

[0031] Description of main component symbols:

[0032] 10. stator teeth; 20. coils; 31. axial insulators; 32. radial insulators; 311. inner ring; 312. outer ring; 313. connecting section; 314. positioning hole; 41. inner shell; 42. outer shell; 43. stator plate; 431. slot; 44. inner insulating ring; 45. outer insulating ring; 51. liquid outlet; 52. first inlet and outlet; 53. second inlet and outlet; 11. pole shoe; 60. axial insulator plate.

[0033] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] See also Figure 1 to Figure 4 The stator assembly in the first embodiment of the utility model includes a stator component, a winding component and an insulation component.

[0038] The stator assembly includes a plurality of stator teeth 10 in an annular array, and the plurality of stator teeth 10 are independently arranged from each other;

[0039] The winding assembly includes a coil 20 individually arranged around the periphery of each stator tooth 10;

[0040] The insulating assembly includes an axial insulating member 31 and a radial insulating member 32. The axial insulating member 31 is sleeved on the stator tooth 10 and is attached to the axial end surface of the coil 20. The radial insulating member 32 is attached to the radial surface of the stator tooth 10 to insulate the inner surface of the coil 20 from contacting the stator tooth 10.

[0041] By adopting a combination of an axial insulating part 31 and a radial insulating part 32 and making them separable, the axial insulating part 31 can be effectively prevented from interfering with the assembly of the pre-formed coil 20. Compared with the coil frame in the prior art, this design scheme improves the flexibility and efficiency of the installation of the coil 20 while maintaining the insulation performance.

[0042] For details, see Figure 4In this embodiment, the radial insulating member 32 is an insulating paper attached to the radial surface of the stator tooth 10, which hardly occupies the space of the stator tooth slot, so that the stator tooth 10 can accommodate a coil 20 of a larger size or more turns, which effectively guarantees the electromagnetic performance design of the motor. The axial insulating member 31 includes but is not limited to insulating paper, epoxy glass fiber board or heat-resistant and oil-resistant plastic.

[0043] like Figure 5 As shown, the axial insulating member 31 includes an inner ring 311, an outer ring 312 and a plurality of connecting segments 313 connecting the two. The plurality of connecting segments 313 are arranged circumferentially at intervals, and a positioning hole 314 for cooperating with the stator tooth 10 is formed between two adjacent connecting segments 313. In this embodiment, the shape of the positioning hole 314 matches the contour of the stator tooth 10, and the two cooperate to achieve the assembly between the stator tooth 10 and the axial insulating member 31. The axial insulating member 31 serves to insulate the coil 20 in the axial direction, while the radial insulating member 32 serves to insulate the coil 20 in the radial direction. The combination of the two achieves the same insulation effect as the coil frame in the prior art. In addition, the axial insulating member 31 can also limit the position of the coil 20 in the axial direction, and limit the position of the plurality of stator teeth 10 in the radial direction, to ensure that the coil 20 and the stator teeth 10 maintain a stable position during the operation of the motor. For the assembly relationship between the axial insulating member 31 and the stator tooth 10, please refer to FIG. Figure 3 .

[0044] For details, see Figure 1 , Figure 6 and Figure 7 The stator assembly further includes an inner shell 41, an outer shell 42 and a stator plate 43 connecting the two. A stator cavity is formed between the inner shell 41 and the outer shell 42. A plurality of stator teeth 10 are arranged on the stator plate 43 and located in the stator cavity. An inner insulating ring 44 is provided on the surface of the inner shell 41 located in the stator cavity, and an outer insulating ring 45 is provided on the surface of the outer shell 42 located in the stator cavity. It can be understood that the inner insulating ring 44 is used for electrical isolation between the radial inner edge surface of the coil 20 and the inner shell 41, and the outer insulating ring 45 is used for electrical isolation between the radial outer edge surface of the coil 20 and the outer shell 42. Thus, the combination of the axial insulating member 31, the radial insulating member 32, the inner insulating ring 44 and the outer insulating ring 45 constitutes all-round insulation of the coil 20, greatly reducing the risk of electrical failure of the coil 20 and ensuring the stable operation of the motor under various working conditions.

[0045] It should be noted that, in the present embodiment, a stator plate 43 is provided on both axial sides of the inner shell 41 and the outer shell 42, respectively. During the actual assembly process, one of the stator plates 43 can be removed to expose the stator cavity, and then a plurality of stator teeth 10 are fixed to another stator plate 43 connected to the inner shell 41 and the outer shell 42, ensuring that each stator tooth 10 is aligned with the positioning hole 314 on the axial insulating member 31, and then the axial insulating member 31, the coil 20 and the axial insulating member 31 are sequentially sleeved on the stator tooth 10, and finally the stator plate 43 is covered and fixed by bolts, thereby completing the assembly of the stator assembly.

[0046] For further information, see Figure 7 The inner peripheral surface of the shell 42 is concave to form a drainage channel, the outer insulating ring 45 is provided with a plurality of liquid outlets 51 connected to the drainage channel, and the outer peripheral surface of the shell 42 is provided with a first inlet and outlet 52 and a second inlet and outlet 53 connected to the drainage channel.

[0047] It can be understood that the first inlet and outlet 52 is used to supply cooling oil into the stator cavity, and the second inlet and outlet 53 is used to discharge the cooling oil after heat exchange in the stator cavity. The stator teeth 10 and the coils 20 are fully immersed in the circulating oil for cooling, which effectively prevents local overheating and ensures the stable operation and performance output of the motor.

[0048] In this embodiment, the liquid outlet holes 51 are arranged in one-to-one correspondence with the stator teeth 10. This design allows the cooling oil to be sprayed directly onto the radial surface of each stator tooth 10 when it is sprayed out from the liquid outlet holes 51, and to flow into the gaps between the stator teeth 10 after fully contacting the radial surface of the stator teeth 10, and finally fill the entire stator cavity. This flow path allows the oil to be in uniform and sufficient contact with the stator teeth 10 and the coils 20, which improves the heat exchange efficiency and helps to maintain the consistency of the internal temperature of the motor and reduce the thermal stress caused by uneven temperature.

[0049] For further information, see Figure 1 , Figure 6 and Figure 8 The stator teeth 10 are provided with pole shoes 11 at both axial ends, and the stator plate 43 is provided with a slot 413 that matches the pole shoe 11. The pole shoe 11 matches the slot 413 to fix the stator teeth 10 on the stator plate 43. In addition, the pole shoe 11 is used to form a semi-open slot to improve the electromagnetic performance of the stator core.

[0050] In one of the implementations of this embodiment, both pole shoes 11 are fixed to the stator teeth 10 by glue. When the pole shoes 11 are fixed on the axial end faces of the stator teeth 10, the pole shoes 11 can limit the axial insulating member 31 to a certain extent, thereby preventing the axial insulating member 31 from separating from the stator teeth 10.

[0051] In another implementation of the present embodiment, one of the pole shoes 11 is integrally formed with the stator tooth 10, and the other pole shoe 11 is fixed to the stator tooth 10 by glue. This design simplifies the bonding step of the pole shoe 11 to a certain extent and does not affect the installation of the coil 20 and the axial insulation 31 on the stator tooth 10.

[0052] In summary, the stator assembly in the above-mentioned embodiment of the utility model adopts a combination of an axial insulating part 31 and a radial insulating part 32 and makes them separable, thereby effectively avoiding interference of the axial insulating part 31 with the assembly of the pre-formed coil 20. Compared with the coil frame in the prior art, this design scheme improves the flexibility and efficiency of the installation of the coil 20 while maintaining the insulation performance.

[0053] Please refer to Figures 9 to 11 The stator assembly in the second embodiment of the utility model is different from the stator assembly in the first embodiment in that the axial insulating member 31 includes a plurality of axial insulator plates 60 arranged in sequence along the circumferential direction of the inner shell 41, and the axial insulator plates 60 are provided with one or more positioning holes 314 that cooperate with the stator teeth 10. Specifically, in this embodiment, each of the axial insulator plates 60 is fan-shaped, and when all the axial insulator plates 60 are combined into one, the shape is similar to the axial insulator 31 in the first embodiment.

[0054] Specific reference Fig.10 , which is a schematic diagram of a structure in which a positioning hole 314 is opened on the axial insulator plate 60. In practical applications, each stator tooth 10 can be independently assembled with the coil 20, the axial insulator plate 60 and the pole shoe 11 to form a separate whole. Fig. 9 As shown, this design provides greater flexibility after being assembled on the stator plate 43 . When a certain stator tooth 10 needs to be maintained or replaced, it can be disassembled and repaired separately without affecting other stator teeth 10 .

[0055] Specific reference Fig.11 , which is a schematic diagram of a structure in which four positioning holes 314 are opened on the axial insulator plate 60, so that the four stator teeth 10 form a single whole, which can reduce the time and labor required for individually assembling each stator tooth 10 on the stator plate 43, thereby improving assembly efficiency. Of course, the number of positioning holes 314 can also be 2 or 3. Fig.11 This is for example only and not limiting.

[0056] The third embodiment of the present utility model further provides a disc-type motor, comprising the stator assembly described in the above technical solution.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0058] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A stator assembly, characterized in that: include: a stator assembly comprising a plurality of stator teeth in an annular array; A winding assembly, the winding assembly comprising a coil individually wound around the periphery of each stator tooth; The insulating component includes an axial insulating member and a radial insulating member. The axial insulating member is sleeved on the stator teeth and affixed to the axial end surface of the coil. The radial insulating member is affixed to the radial surface of the stator teeth to insulate the inner surface of the coil from contacting the stator teeth.

2. The stator assembly according to claim 1, characterized in that: The axial insulating member comprises an inner ring, an outer ring and a plurality of connecting segments connecting the inner ring and the outer ring. The plurality of connecting segments are arranged at intervals around the circumference, and a positioning hole for cooperating with the stator teeth is formed between two adjacent connecting segments.

3. The stator assembly according to claim 1, characterized in that: The stator assembly also includes an inner shell, an outer shell and a stator plate connecting the two, a stator cavity is formed between the inner shell and the outer shell, a plurality of stator teeth are arranged on the stator plate and located in the stator cavity, an inner insulating ring is provided on the surface of the inner shell located in the stator cavity, and an outer insulating ring is provided on the surface of the outer shell located in the stator cavity.

4. The stator assembly according to claim 3, characterized in that: The inner peripheral surface of the shell is concave to form a drainage channel, the outer insulating ring is provided with a plurality of liquid outlets connected to the drainage channel, and the outer peripheral surface of the shell is provided with a first inlet and a second inlet and a second inlet connected to the drainage channel.

5. The stator assembly according to claim 4, characterized in that: The liquid outlet holes are arranged in one-to-one correspondence with the stator teeth.

6. The stator assembly according to claim 3, characterized in that: Pole shoes are respectively provided at both axial ends of the stator teeth, and slots matched with the pole shoes are provided on the stator plate. The pole shoes match with the slots to fix the stator teeth on the stator plate.

7. The stator assembly according to claim 3, characterized in that: The axial insulating member comprises a plurality of axial insulator plates sequentially arranged along the circumferential direction of the inner shell, and one or more positioning holes matched with the stator teeth are formed on the axial insulator plates.

8. The stator assembly according to claim 1, characterized in that: The radial insulating member is insulating paper attached to the radial surface of the stator teeth.

9. A disc motor, characterized in that: The invention comprises a stator assembly as claimed in any one of claims 1 to 8.

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