Stator assembly and electric machine thereof

Abstract

The application discloses a kind of stator assemblies, and discloses motor with stator assembly, wherein stator assembly, including stator core, first frame, stator winding and multiple insulated wires, first frame is located at the side of stator core axially, first frame has annular support part, wire fixing part and multiple winding parts, winding part is located inside annular support part and is arranged at annular support part circumferentially interval, wire fixing part is arranged outside annular support part, wire fixing part is provided with at least one wire fixing groove;Stator winding is arranged in winding part, and stator winding is provided with wire end;Insulated wire is provided with conductive wire core at one end;Wherein, conductive wire core and wire end form electric connection part, and electric connection part is placed in wire fixing groove.Wire fixing groove is used to accommodate electric connection part and ensure the electrical clearance and creepage distance between electric connection part, while facilitating further wire arrangement, avoid using plastic ribbon fixed.Effective reduction of material cost and labor cost, simplify production procedure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a stator assembly and an electric machine. BACKGROUND

[0002] When the electric machine is running, there are problems of high temperature rise of the stator winding, large vibration of the electric machine body and large noise. The related technology solves the above problems by injection molding the stator assembly into a whole body with resin, but there are problems of complex structure and high cost of the stator winding and the insulated wire connection, wire arrangement, connection protection, insulation at the connection, connection fixation, injection sealing at the connection, and injection impact protection structure at the connection, and many manufacturing processes. SUMMARY

[0003] The present application aims to at least solve one of the technical problems of high installation cost and many manufacturing processes of the stator winding and the insulated wire in the prior art. To this end, the present application provides a stator assembly, which can be low in cost and simple in production process.

[0004] The present application also provides an electric machine with the above stator assembly.

[0005] The stator assembly according to the first aspect of the present application comprises a stator core, a first frame, a stator winding and a plurality of insulated wires. The first frame is arranged on one side of the stator core in the axial direction. The first frame has an annular support portion, a wire fixing portion and a plurality of wire winding portions. The wire winding portions are arranged on the inner side of the annular support portion and spaced apart in the circumferential direction of the annular support portion. The wire fixing portion is arranged on the outer side of the annular support portion. The wire fixing portion is provided with at least one wire fixing groove. The stator winding is arranged in the wire winding portion. The stator winding is provided with a wire end. One end of the insulated wire is provided with a conductive wire core. The conductive wire core and the wire end form an electrical connection portion. The electrical connection portion is arranged in the wire fixing groove.

[0006] The stator assembly according to the present application has at least the following beneficial effects. The wire fixing groove is used to accommodate the electrical connection portion and ensure the electrical clearance and creepage distance between the electrical connection portions. At the same time, it is convenient to further arrange the wires and avoid the use of plastic cable ties for fixation. The material cost and labor cost are effectively reduced, and the production process is simplified.

[0007] According to some embodiments of the present application, a wire arrangement groove is arranged between the wire fixing groove and the annular support portion. The wire arrangement groove is in communication with the wire fixing groove.

[0008] According to some embodiments of the present application, the wire fixing portion is provided with a first recess. The first recess is arranged on the side of the wire fixing groove away from the annular support portion. The first recess is in communication with the wire fixing groove.

[0009] According to some embodiments of the present application, the electric connection part is placed in the wire fixing groove after being wrapped by a heat shrink tube.

[0010] According to some embodiments of the present application, the electric connection part further comprises a terminal which assembles the conductive wire core and the wire end into the electric connection part.

[0011] According to some embodiments of the present application, the stator assembly comprises a cover plate which is installed on the first frame away from the stator core.

[0012] According to some embodiments of the present application, the wire fixing part is provided with at least one first protruding part, the cover plate is provided with at least one second fixing hole, and the first protruding part is connected with the second fixing hole correspondingly; or the wire fixing part is provided with at least one first fixing hole, the cover plate is provided with at least one second protruding part, and the first fixing hole is connected with the second protruding part correspondingly.

[0013] According to some embodiments of the present application, the wire fixing part has a first top surface, and the cover plate has a first bottom surface which is in contact with the first top surface.

[0014] According to some embodiments of the present application, the wire fixing part is provided with a first groove which is arranged on the side of the wire fixing groove away from the annular supporting part, the first groove is in communication with the wire fixing groove, the first bottom surface is provided with a second groove, and the insulating wire is arranged between the first groove and the second groove.

[0015] According to some embodiments of the present application, the stator assembly comprises a second frame which is arranged on the other side of the stator core in the axial direction, and the stator winding is wound around the first frame and the second frame.

[0016] According to some embodiments of the present application, the stator assembly comprises an injection molding body which integrally injects the stator core, the first frame, the second frame, the stator winding and the electric connection part.

[0017] The motor according to the second aspect of the embodiments of the present application comprises the stator assembly according to the first aspect of the embodiments of the present application and a rotor assembly which is arranged in the stator assembly.

[0018] The motor according to the embodiments of the present application has at least the following beneficial effects: by adopting the stator assembly according to the first aspect of the embodiments of the present application, the wire fixing groove is used to accommodate the electric connection part and ensure the electrical clearance and the creepage distance between the electric connection parts, and the wire is further conveniently arranged, thereby avoiding the use of plastic cable ties for fixing. The material cost and the labor cost are effectively reduced, and the production process is simplified.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of a stator assembly (stator windings and insulated wires omitted) according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the first frame is shown;

[0023] Figure 3 This is a schematic diagram of a stator assembly (including stator windings and insulated wires) according to an embodiment of the present invention;

[0024] Figure 4 for Figure 3 A schematic diagram of the electrical connection portion is shown;

[0025] Figure 5 for Figure 3 The diagram shown is a schematic of the stator assembly after the cover plate has been closed.

[0026] Figure 6 for Figure 5 A schematic diagram of the cover plate is shown;

[0027] Figure 7 for Figure 5 The diagram shown is a schematic of the stator assembly after it has been formed into an injection molded body.

[0028] Figure label:

[0029] 101. Stator core; 102. First frame; 103. Second frame;

[0030] 201. Annular support part; 202. Winding part; 203. Wire fixing part; 204. Wire fixing groove; 205. Wire management groove; 206. First groove; 207. First top surface; 208. First protrusion; 209. First fixing hole;

[0031] 301. Stator winding; 302. Insulated wire; 303. Wire end; 304. Electrical connection part;

[0032] 401. Terminal; 402. Conductive wire core; 403. Heat shrink tubing; 404. Enamelled wire;

[0033] 501. Cover plate;

[0034] 601. First bottom surface; 602. Second groove; 603. Second fixing hole; 604. Second protrusion;

[0035] 701. The injection molded body. DETAILED DESCRIPTION

[0036] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same or like elements or components. The embodiments described below are exemplary, and are not intended to be limiting.

[0037] In the description of the present application, if the orientation description, such as up, down, front, back, left, right, etc. is involved, the orientation or position relationship shown in the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0038] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If the first, second, etc. are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0039] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0040] Reference Figure 1 As shown in the drawings, it can be understood that the embodiments of the first aspect of the present application propose a stator assembly, which comprises a stator core 101, a first frame 102 and a second frame 103, and the first frame 102 and the second frame 103 are arranged along the axial direction of the stator core 101. Specifically, the first frame 102 is arranged on one side of the stator core 101 in the axial direction, and the second frame 103 is arranged on the other side of the stator core 101 in the axial direction.

[0041] It can be understood that in some embodiments, the first frame 102 and the second frame 103 are respectively mounted on the stator core 101, i.e. a separate structure is adopted, and by setting the positions of the first frame 102 and the second frame 103, the area of the stator winding 301 is ensured; while in some other embodiments, the first frame 102 and the second frame 103 are integrally injection molded with the stator core 101 by a resin material, and this mode can be adopted when the slot fill rate is not high.

[0042] Referring to Figure 2 As shown in the figure, it can be understood that the first frame 102 has a ring-shaped support portion 201, a wire fixing portion 203, and a plurality of wire winding portions 202. Among them, the wire winding portion 202 is located on the inner side of the ring-shaped support portion 201, and the plurality of wire winding portions 202 are arranged at intervals around the circumference of the ring-shaped support portion 201. The wire fixing portion 203 is arranged on the outer side of the ring-shaped support portion 201, and the wire fixing portion 203 is provided with at least one wire fixing groove 204. The wire fixing groove 204 is a blind hole structure, which is recessed in the wire fixing portion 203 along the axial direction of the stator core 101, so that the bottom wall of the wire fixing groove 204 is lower than the outer plane of the wire fixing portion 203.

[0043] It should be noted that the ring-shaped support portion 201, the plurality of wire winding portions 202, and the wire fixing portion 203 can be an integral structure or a split structure.

[0044] Referring to Figure 3 and Figure 4 As shown in the figure, it can be understood that the stator assembly further includes a stator winding 301 and a plurality of insulated wires 302. Among them, the stator winding 301 is arranged in the wire winding portion 202, and the stator winding 301 is provided with a wire end 303, which is placed towards the direction close to the wire fixing groove 204. The main body of the insulated wire 302 is located on the outer circumferential side of the ring-shaped support portion 201, and one end of the insulated wire 302 is provided with a conductive wire core 402, which is placed towards the direction close to the wire fixing groove 204. Thus, the conductive wire core 402 of the insulated wire 302 and the wire end 303 of the stator winding 301 are connected to form an electrical connection portion 304, which is placed in the wire fixing groove 204 of the wire fixing portion 203. In other words, the wire fixing groove 204 is used to accommodate the part connected by the stator winding 301 and the insulated wire 302. When the wire fixing groove 204 has a plurality of wire fixing grooves 204, a plurality of electrical connection portions 304 can be placed in the plurality of wire fixing grooves 204, respectively. The plurality of wire fixing grooves 204 are arranged at intervals, and after the electrical connection portion 304 is placed in the wire fixing groove 204, the wire fixing groove 204 can ensure the electrical clearance and creepage distance between the electrical connection portions 304.

[0045] It can be understood that the opening of the wire fixing groove 204 is arranged upwards, which facilitates the machining of the wire fixing groove 204 and the placement of the electrical connection portion 304 in the wire fixing groove 204.

[0046] Meanwhile, the use of the cable tray 204 facilitates further cable management, avoiding the need for plastic cable ties. In related technologies, stator windings 301 and insulated wires 302 are typically secured manually with plastic cable ties, sometimes even requiring additional tubing for fixation and insulation. However, with the cable tray 204, the conductive core 402 of the insulated wire 302 can be directly crimped to the wire end 303 of the stator winding 301 by machine, and the resulting electrical connection 304 directly enters the cable tray 204, reducing manual intervention and the use of plastic cable ties. Furthermore, the tight fit between the electrical connection 304 and the cable tray 204 also provides some protection for the electrical connection 304.

[0047] In other words, the cable tray 204 can simultaneously meet the needs of fixing the insulated wire 302 and the stator winding 301. This enriches the functionality of the first frame 102, reduces material input, simplifies the wire management process, improves assembly efficiency, and reduces product production costs. It effectively solves the problems of complex and costly structures and numerous manufacturing processes related to the connection, wire management, connection point protection, connection point insulation, connection point fixing, connection point injection molding sealing, and connection point injection molding impact protection between the stator winding 301 and the insulated wire 302.

[0048] It is understandable that since the wire fixing groove 204 is located on the outside of the annular support 201, while ensuring the effectiveness and feasibility of fixing the electrical connection part 304 with the wire fixing groove 204, it will not interfere with the rotor assembly of the motor, thus ensuring the normal use of the stator assembly.

[0049] Reference Figure 2 As shown, it can be understood that the first frame 102 is also provided with a cable management groove 205, which is located between the cable fixing groove 204 and the annular support part 201, and is connected to the cable fixing groove 204. The end of the cable management groove 205 facing the cable fixing groove 204 has a smaller width, while the end of the cable management groove 205 facing the winding part 202 has a larger width, thus forming a guide structure.

[0050] Understandably, without the cable management groove 205, if part of the enameled wire 404 of the stator winding 301 were to be routed from the winding section 202 to the cable fixing groove 204, this part of the enameled wire 404 would directly enter the cable fixing groove 204 from the annular support section 201. That is, it would be placed directly from a structure with a larger diameter into a structure with a smaller diameter. At the intersection of the structure with the larger diameter and the structure with the smaller diameter, a region of abrupt size change would be formed. In this region of abrupt size change, this part of the enameled wire 404 would tend to spread outward, and the wiring would be more messy. This would increase the difficulty of connecting, managing, protecting, insulating, fixing, and sealing the connection with the insulated wire 302.

[0051] And by setting the wire arrangement groove 205, the wire arrangement groove 205 is a gradual transition area, which can guide part of the enameled wire 404 from the annular support part 201 to the wire fixing groove 204. In this process, the arrangement path of the enameled wire 404 is gradually changed, which can reasonably distribute the positions of each enameled wire 404, so that the enameled wire 404 is arranged in order, and it is also more convenient to connect, arrange, protect, insulate, fix, and injection seal at the connection place of the insulated wire 302.

[0052] Referring to Figures 1 to 3 It can be understood that the wire fixing part 203 is provided with a first recess 206 for placing the insulated wire 302. The first recess 206 is located on the side of the wire fixing groove 204 away from the annular support part 201, and the first recess 206 is in communication with the wire fixing groove 204. Specifically, one end of the first recess 206 is in communication with the wire fixing groove 204, and the other end penetrates the edge of the wire fixing part 203. So that the insulated wire 302 can enter the first recess 206 from outside the first frame 102, and then be placed in the wire fixing groove 204. By placing the insulated wire 302 through the first recess 206, the insulated wire 302 is prevented from moving around, which can effectively limit the position of the insulated wire 302, making it more convenient to arrange, connect, fix, and injection seal at the connection place of the insulated wire 302.

[0053] Referring to Figure 4 It can be understood that the electrical connection part 304 further includes a terminal 401, which assembles the conductive wire core 402 and the wire end 303 into the electrical connection part 304. Specifically, the terminal 401 wraps and extrudes the conductive wire core 402 of the insulated wire 302 and the wire end 303 of a stator winding 301 or multiple stator windings 301 together to form the electrical connection part 304, thereby effectively fixing the insulated wire 302 and the stator winding 301, so that the electrical connection part 304 composed of the conductive wire core 402 and the wire end 303 is more secure and less likely to come loose. The terminal 401 has an opening, and after the conductive wire core 402 of the insulated wire 302 and the wire end 303 of the stator winding 301 are placed in the opening of the terminal 401, the terminal 401 is extruded by a machine to wrap the wire end 303 and the conductive wire core 402, thereby fixing the connection between the wire end 303 and the conductive wire core 402. Compared with manually winding the wire end 303 and the conductive wire core 402, the machine extruding the terminal 401 to wrap the wire end 303 and the conductive wire core 402 is more efficient, has higher reliability of connection, and reduces the involvement of manual labor, thereby reducing labor costs.

[0054] Referring to Figure 4As shown, it can be understood that the stator assembly further comprises a heat shrink tube 403, which wraps the wire end 303 and the conductive wire core 402, and wraps the insulated wire 302 and the stator winding 301 connected with the electrical connection part 304. The heat shrink tube 403 is a special polyolefin material heat shrink sleeve. The outer layer is made of high-quality soft cross-linked polyolefin material and the inner layer is hot melt glue composite processing. The outer layer material has the characteristics of insulation, corrosion resistance, wear resistance, etc., and the inner layer has the advantages of low melting point, waterproof sealing and high adhesion. When producing, the heat shrink tube is heated to a high elastic state, a load is applied to expand it, and it is quickly cooled while maintaining expansion, so that it enters a glass state. This state is fixed. When used, it will return to a high elastic state, but at this time the load is gone, and it will shrink.

[0055] It can be understood that the heat shrink tube 403 can protect the wire end 303 of the electrical connection part 304 from being easily broken. Because the wire end 303 is the bare wire on the enameled wire 404 of the stator winding 301, and if it is exposed after being assembled with the conductive wire core 402, it is easy to be hit or rubbed with the inner wall of the wire fixing groove 204 and broken. Especially when the terminal 401 is used to wrap and press the conductive wire core 402 of the insulated wire 302 and the wire end 303 of one stator winding 301 or the wire ends 303 of multiple stator windings 301 together to form the electrical connection part 304, the electrical connection part 304 after being pressed forms a flat structure, the edges are more sharp and sharp, and the wire end 303 of the stator winding 301 is more likely to be broken. By sleeving the heat shrink tube 403 outside the electrical connection part 304, the heat shrink tube 403 can play the role of a protective sleeve, so that the wire end 303 of the electrical connection part 304 is not easy to break. In addition, the heat shrink tube 403 has the characteristic of insulation, and after the heat shrink tube 403 is sleeved on the electrical connection part 304, it can prevent the conductive wire core 402 of the insulated wire 302 and the wire end 303 of the stator winding 301 from being exposed, and play the role of insulation protection. And when the material of some insulated wire 302 conductive wire core 402 and stator winding 301 wire end 303 is aluminum, the heat shrink tube 403 wrapping the electrical connection part 304 can also prevent the aluminum from oxidizing.

[0056] Referring to Figure 5As shown, it can be understood that in some embodiments, the stator assembly further comprises a cover plate 501, which is installed on the first frame 102 and located on the side of the first frame 102 away from the stator core 101. Specifically, the cover plate 501 covers the wire fixing part 203, and the cover plate 501 can cover the wire fixing groove 204, so as to be used for protecting and fixing the electrical connection part 304 in the wire fixing groove 204, thereby improving the quality of the connection between the insulated wire 302 and the stator winding 301. At the same time, the cover plate 501 can also cover part of the insulated wire 302 and the stator winding 301, so as to further fix the insulated wire 302 and the stator winding 301, and prevent the insulated wire 302 and the stator winding 301 from loosening due to impact or vibration. When the stator assembly is integrally injection molded with resin, the cover plate 501 can also cooperate with the wire fixing groove 204 to prevent the injection molded body 701 from impacting the electrical connection part 304 during injection molding.

[0057] Referring to Figure 1 and Figure 2 As shown, it can be understood that the wire fixing part 203 has a first top surface 207, which is located on the same side of the wire fixing part 203 as the wire fixing groove 204. Figure 6 As shown, it can be understood that the cover plate 501 has a first bottom surface 601, which is located at the bottom of the cover plate 501, and the first bottom surface 601 is in contact with the first top surface 207 when the cover plate 501 is covered on the first frame 102.

[0058] It should be noted that in other embodiments, the first bottom surface 601 can also not be in contact with the first top surface 207 when the cover plate 501 is covered on the first frame 102. For example, the cover plate 501 is installed on the annular support part 201, and there is a gap between the first bottom surface 601 and the first top surface 207. The advantage of the scheme in which the first bottom surface 601 is in contact with the first top surface 207 is that when the stator assembly is integrally injection molded with resin, the cover plate 501 can cooperate with the wire fixing part 203 of the first frame 102 to achieve sealing, preventing the injection molded body 701 from overflowing, thereby improving the injection molding quality.

[0059] Referring to Figure 6As shown, it can be understood that the first bottom surface 601 is provided with a second groove 602, and the second groove 602 is located on the side of the cover plate 501 away from the annular support portion 201. When the cover plate 501 is installed on the first frame 102, the position of the second groove 602 corresponds to the position of the first groove 206, that is, the second groove 602 is located directly above the first groove 206. In this way, the first groove 206 and the second groove 602 can form a wiring channel, and the wiring channel can accommodate the insulated wire 302. In other words, the insulated wire 302 is arranged between the first groove 206 and the second groove 602, and the first groove 206 and the second groove 602 can further fix the insulated wire 302 and protect the insulated wire 302. Moreover, the insulated wire 302 fills the wiring channel between the first groove 206 and the second groove 602, so that there is little space between the extension side of the insulated wire 302 and the wire fixing groove 204, which can be used for sealing the injection body 701, so that the injection body 701 does not overflow to the extension side of the insulated wire 302. Among them, the extension side of the insulated wire 302 refers to the side of the insulated wire 302 away from the annular support portion 201, and is the side of the insulated wire 302 extending out of the first groove 206.

[0060] Referring to Figures 1 to 3 As shown, it can be understood that the wire fixing portion 203 is provided with two first protruding portions 208. Referring to Figure 6 As shown, it can be understood that the cover plate 501 is provided with two second fixing holes 603. The first protruding portion 208 cooperates with the second fixing hole 603, that is, the first protruding portion 208 is inserted into the second fixing hole 603, which is used for positioning and fixing the cover plate 501 and the first frame 102, and ensures the turnover of the stator assembly and the positioning of the injection body 701 mold.

[0061] It should be noted that in other embodiments, the wire fixing portion 203 can also be provided with only one first protruding portion 208, and the cover plate 501 is also provided with only one second fixing hole 603. In this way, the number of first protruding portions 208 and second fixing holes 603 can also be more than three.

[0062] Referring to Figures 1 to 3 As shown, it can be understood that the wire fixing portion 203 is provided with two first fixing holes 209. Referring to Figure 6 As shown, it can be understood that the cover plate 501 is provided with two second protruding portions 604. The first fixing hole 209 cooperates with the second protruding portion 604, that is, the second protruding portion 604 is inserted into the first fixing hole 209, which is used for positioning and fixing the cover plate 501 and the first frame 102, and ensures the turnover of the stator assembly and the positioning of the injection body 701 mold.

[0063] It should be noted that in other embodiments, the fixed wire part 203 can also be provided with only one first fixing hole 209, and the cover plate 501 is correspondingly provided with only one second protruding part 604. In this way, the number of the first fixing hole 209 and the second protruding part 604 can also be more than three.

[0064] It should be noted that referring to FIG. 6, it can be understood that the fixed wire part 203 is provided with two first protruding parts 208 and two first fixing holes 209. Figures 1 to 3 It should be noted that referring to FIG. 6, it can be understood that the fixed wire part 203 is provided with two first protruding parts 208 and two first fixing holes 209. Figure 6 It should be noted that referring to FIG. 6, it can be understood that the fixed wire part 203 is provided with two first protruding parts 208 and two first fixing holes 209.

[0065] It should be noted that referring to FIG. 6, it can be understood that the fixed wire part 203 is provided with two first protruding parts 208 and two first fixing holes 209. Figure 7 It should be noted that referring to FIG. 6, it can be understood that the fixed wire part 203 is provided with two first protruding parts 208 and two first fixing holes 209.

[0066] It can be understood that when the resin is used to integrally injection mold the stator assembly, the resin solidifies to form the injection molded body 701. During the injection molding process, the injection pressure can reach 10 Mpa. When the resin is injected, the injection molded body 701 impacts the electrical connection part 304, which can easily cause the electrical connection part 304 to loosen. By providing the fixed wire groove 204, the electrical connection part 304 is placed in the fixed wire groove 204, and the fixed wire groove 204 can protect the electrical connection part 304 from being directly impacted by the injection molded body 701. Therefore, compared with the scheme of using a plastic strap or a wire buckle, the scheme of using the fixed wire groove 204 can better protect the electrical connection part 304. Furthermore, by adding the cover plate 501 on the basis of the fixed wire groove 204, the injection molded body 701 can be further prevented from impacting the electrical connection part 304 during injection molding. In addition, the cover plate 501 in cooperation with the fixed wire part 203 can also be used to seal the injection molded body 701, thereby reducing the overflow of the injection molded body 701.

[0067] The motor of the second aspect embodiment of the present application comprises the stator assembly of the first aspect embodiment of the present application and the rotor assembly, and the rotor assembly is arranged in the stator assembly. By using the stator assembly of the first aspect embodiment of the present application, the fixed wire groove 204 is used to accommodate the electrical connection part 304 and ensure the electrical clearance and creepage distance between the electrical connection parts 304, and further facilitates wire arrangement, thereby avoiding the use of a plastic strap for fixation. The material cost and labor cost are effectively reduced, and the production process is simplified.

[0068] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A stator assembly, characterized by, The stator assembly comprises: a stator core; a first frame arranged on one side of the stator core in the axial direction, the first frame comprising an annular support portion, a wire fixing portion, and a plurality of wire winding portions, the wire winding portions being arranged on the inner side of the annular support portion and spaced apart in the circumferential direction of the annular support portion, the wire fixing portion being arranged on the outer side of the annular support portion, the wire fixing portion being provided with at least one wire fixing groove; a stator winding arranged in the wire winding portions, the stator winding being provided with wire ends; a plurality of insulated wires, each of the insulated wires being provided with a conductive wire core at one end; wherein the conductive wire core and the wire end form an electrical connection portion, the electrical connection portion being arranged in the wire fixing groove, the wire fixing portion being provided with a first recess, the first recess being arranged on the side of the wire fixing groove away from the annular support portion, one end of the first recess being in communication with the wire fixing groove, and the other end of the first recess penetrating through the edge of the wire fixing portion, and the electrical connection portion further comprising a terminal, the terminal being wrapped around the conductive wire core and the wire end to form the electrical connection portion.

2. The stator assembly of claim 1, wherein, A wire arranging groove is arranged between the wire fixing groove and the annular support portion, and the wire arranging groove is in communication with the wire fixing groove.

3. The stator assembly of claim 1, wherein, The electrical connection portion is wrapped by a heat shrink tube and arranged in the wire fixing groove.

4. The stator assembly of claim 1, wherein, The stator assembly comprises a cover plate, the cover plate being arranged on the side of the first frame away from the stator core.

5. The stator assembly of claim 4, wherein, The wire fixing portion is provided with at least one first protrusion, and the cover plate is provided with at least one second fixing hole, the first protrusion being connected to the second fixing hole in correspondence; or the wire fixing portion is provided with at least one first fixing hole, and the cover plate is provided with at least one second protrusion, the first fixing hole being connected to the second protrusion in correspondence.

6. The stator assembly of claim 4, wherein, The wire fixing portion has a first top surface, and the cover plate has a first bottom surface, the first bottom surface being in contact with the first top surface.

7. The stator assembly of claim 6, wherein, The wire fixing portion is provided with a first recess, the first recess being arranged on the side of the wire fixing groove away from the annular support portion, the first recess being in communication with the wire fixing groove, the first bottom surface being provided with a second recess, and the insulated wires being arranged between the first recess and the second recess.

8. The stator assembly of claim 1, wherein, The stator assembly comprises a second frame arranged on the other side of the stator core in the axial direction, and the stator winding is wound around the first frame and the second frame.

9. The stator assembly of claim 8, wherein, The stator assembly comprises an injection body, the injection body being integrally formed with the stator core, the first frame, the second frame, the stator winding, and the electrical connection portion.

10. An electric machine characterized by The stator assembly comprises: any one of claims 1 to 9; a rotor assembly arranged in the stator assembly.

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