Stator assembly and electric machine

Abstract

The application provides a kind of stator assembly and motor, stator assembly includes stator core and insulation frame, stator core includes tooth part, and each insulation frame is connected to a tooth part;Insulation frame includes tooth part cover, yoke part cover and positioning body;Yoke part cover includes first cover part and two second cover parts, yoke part cover includes first cover part and second cover part, first cover part is used to cover the side surface of yoke part towards tooth part, and second cover part is used to cover the axial end surface of yoke part;Positioning body is connected to the side of second cover part towards yoke part and protrudes, motor includes the above-mentioned stator assembly.Insulation frame is not easy to move along the radial direction of yoke part, the fixing effect between insulation frame and stator core is good, insulation frame is not easy to loosen or fall off, and the running safety of stator assembly and motor is high.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator assembly and a motor. Background Art

[0002] The stator assembly typically consists of a stator core and windings. The windings are wound with enameled wire. During motor operation, the enameled wire may break. Direct contact between the damaged wire and the stator core can cause a short circuit. Therefore, direct contact between the enameled wire and the stator core must be avoided in the stator assembly to meet insulation requirements.

[0003] To meet insulation requirements, some stators are equipped with an insulating frame. This frame covers the stator core teeth and yoke, and the windings are then wound around it. Some existing insulating frames are prone to radial movement relative to the stator core, making them prone to loosening or even falling off, compromising the safety of the stator assembly during use. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a stator assembly in which an insulating frame is not easily displaced along the radial direction of the yoke, and the insulating frame is effectively fixed to the stator core, thereby improving the safety of the stator assembly.

[0005] The present invention also provides a motor having the stator assembly.

[0006] According to an embodiment of the first aspect of the present invention, a stator assembly includes: a stator core, including a yoke and a plurality of teeth, the yoke being annular, the teeth being connected to the yoke and protruding radially along the yoke; an insulating frame, each of the teeth being connected to an insulating frame, the insulating frame including a tooth covering body and a yoke covering body, the tooth covering body covering the teeth, the yoke covering body being connected to one end of the tooth covering body, the yoke covering body including at least one first covering body and at least one second covering body, the first covering body covering a side surface of the yoke facing the teeth, and the second covering body covering an axial end surface of the yoke; a positioning body, arranged on the second covering body, protruding axially toward the yoke, the positioning body abutting against the yoke to prevent the insulating frame from falling off the stator core.

[0007] According to the stator assembly provided by the embodiment of the first aspect of the present application, the stator assembly has the following beneficial effects: the stator assembly has the positioning body connected with the second covering part for covering the axial end surface of the yoke part, and the abutting between the positioning body and the stator core after the assembly of the insulating frame and the stator core can prevent the radial movement of the insulating frame along the yoke part, thereby preventing the loosening or falling off of the insulating frame. The insulating frame is not prone to the radial movement along the yoke part after the installation of the insulating frame, the fixing effect between the insulating frame and the stator core is good, and the safety of the stator assembly is high.

[0008] According to some embodiments of the present application, the length of the positioning body is L1, and 0.5mm≤L1≤2.5mm is satisfied.

[0009] According to some embodiments of the present application, the insulating frame further comprises a limiting body connected to one end of the tooth part covering body away from the yoke part covering body; the inner edge of the limiting body is connected to the outer surface of the yoke part covering body, and the outer edge of the limiting body protrudes relative to the outer surface of the yoke part covering body.

[0010] According to some embodiments of the present application, the outer edge of the limiting body has a wire passing notch.

[0011] According to some embodiments of the present application, the two oppositely arranged outer side surfaces of the tooth part covering body are each provided with a plurality of wire grooves.

[0012] According to some embodiments of the present application, the first covering part and the second covering part are each provided with two, the two first covering parts are arranged on the two sides of the tooth part covering body, the two second covering parts are arranged at the two ends of the first covering part along the axial direction of the yoke part, and the second covering part protrudes away from the tooth part covering body relative to the first covering part.

[0013] According to some embodiments of the present application, along the circumferential direction of the yoke part, the end of one of the first covering parts has a receiving groove, and the end of the other first covering part has a shielding part; the shielding part of one of the two adjacent insulating frames can be accommodated in the receiving groove of the other insulating frame.

[0014] According to some embodiments of the present application, the yoke part has a positioning hole, and the positioning body is arranged in the positioning hole.

[0015] According to some embodiments of the present application, the depth of the positioning hole is L2, and the length of the positioning body is L1, and L1≤L2 is satisfied.

[0016] According to some embodiments of the present application, along the radial direction of the yoke part, the side edge of the yoke part away from the tooth part has a positioning groove, and the positioning body is arranged in the positioning groove.

[0017] According to some embodiments of the present invention, the axial length of the positioning groove along the yoke is L3, and the length of the positioning body is L1, satisfying L1≤L3.

[0018] According to some embodiments of the present invention, along the radial direction of the yoke, the positioning body abuts against a side of the yoke away from the tooth portion.

[0019] An electric motor according to an embodiment of a second aspect of the present invention includes the stator assembly of the embodiment of the first aspect.

[0020] The motor according to the embodiment of the third aspect of the present invention has at least the following beneficial effects: the insulating frame is not easy to move radially along the yoke, the fixing effect between the insulating frame and the stator core is good, the insulating frame is not easy to loosen or fall off, and the operating safety of the motor is relatively high.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of an insulating frame in one embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of an insulating frame in another embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of a stator assembly of the present invention;

[0025] Figure 4 yes Figure 3 Schematic diagram of the stator assembly without windings installed;

[0026] Figure 5 yes Figure 3 Schematic diagram of the stator core in;

[0027] Figure 6 yes Figure 4 A magnified schematic diagram of area A in the middle;

[0028] Figure 7 Schematic diagram of the matching relationship between the positioning body of the insulation frame and the positioning hole of the stator core in one embodiment;

[0029] Figure 8 Schematic diagram of the matching relationship between the positioning body of the insulating frame and the positioning hole of the stator core in another embodiment;

[0030] Figure 9 is a schematic diagram of punching sheets stacked to form a stator core in one embodiment;

[0031] Figure 10 This is a schematic diagram of a stator core with separated tooth shoes;

[0032] Figure 11 is a schematic diagram of a stator core provided with positioning slots;

[0033] Figure 12 This is a schematic diagram of the cooperation between the positioning groove and the positioning body.

[0034] Reference numerals:

[0035] 100 - Insulation frame, 101 - Tooth covering body, 102 - First covering part, 103 - Second covering part, 104 - Positioning body, 105 - Tooth penetration cavity, 106 - Limiting body, 107 - Blocking part, 108 - Yoke covering body, 109 - Yoke penetration cavity, 110 - Wire notch, 111 - Wire slot, 112 - Accommodation slot;

[0036] 200- stator assembly, 201- stator core, 202- yoke, 203- teeth, 204- positioning hole, 205- boot, 206- mounting body, 207- mounting slot, 208- stator slot, 209- positioning slot;

[0037] 301-winding;

[0038] 401-punch, 402-longitudinal portion, 403-transverse portion, 404-preset hole. DETAILED DESCRIPTION

[0039] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0040] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In the description of the present invention, "a plurality" refers to more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0043] The present invention provides a stator assembly 200, which includes an insulating frame 100 and a stator core 201. The insulating frame 100 can be made of an insulating material (such as plastic). Figure 1 The insulating frame 100 includes a tooth cover 101, a yoke cover 108, and a positioning body 104. The tooth cover 101 is used to cover the teeth 203 of the stator core 201, and the yoke cover 108 is used to cover the yoke 202 of the stator core 201. The stator assembly 200 also includes a winding 301, which is sleeved on the outside of the tooth cover 101.

[0044] Reference Figure 5 , Figure 5 The stator core 201 shown utilizes a bootless design. The stator core 201 includes a yoke 202 and multiple teeth 203. The yoke 202 is annular, and the teeth 203 are connected to the outer edge of the yoke 202 and protrude radially from the yoke 202. Stator slots 208 are formed between adjacent teeth 203. Generally speaking, the slot bottoms of the stator core 201 are insulated to prevent direct contact between the windings 301 and the portion of the yoke 202 that serves as the walls of the stator slots 208. The stator assembly 200 also includes multiple insulating frames 100, with the number of insulating frames 100 equal to the number of teeth 203, and each insulating frame 100 is connected to a tooth 203.

[0045] Reference Figure 1 or Figure 2 The tooth cover 101 has a tooth cavity 105 inside, which is used to accommodate the teeth 203 of the stator core 201. Once the tooth cover 101 is placed around the teeth 203, winding can be performed on the outside of the teeth 203, thereby installing the winding 301. The tooth cover 101 prevents direct contact between the teeth 203 and the winding 301.

[0046] Reference Figure 1The yoke covering body 108 is connected to one end of the tooth covering body 101. The yoke covering body 108 includes a first covering part 102 and a second covering part 103. There is at least one first covering part 102 and a second covering part 103. The first covering part 102 is used to cover the radial end surface of the yoke 202, and the first covering part 102 covers the surface of the yoke 202 facing the tooth 203. The second covering part 103 is used to cover the axial end surface of the yoke 202. The first covering part 102 can prevent the radial end surface of the yoke 202 from directly contacting the winding 301, and the second covering part 103 can cover the axial end surface of the yoke 202. The first covering part 102 and the second covering part 103 jointly prevent the yoke 202 from contacting the winding 301, thereby avoiding insulation failure.

[0047] During the process of installing the insulating frame 100 onto the stator core 201, it is necessary to move the insulating frame 100 radially relative to the tooth portion 203 along the yoke portion 202. In order to prevent the insulating frame 100 from falling off the stator core 201 due to radial movement of the yoke portion 202 after the insulating frame 100 is sleeved onto the tooth portion 203, a positioning body 104 can be provided in the insulating frame 100.

[0048] Reference Figure 1 The positioning body 104 is connected to the second covering portion 103, and the positioning body 104 protrudes relative to the second covering portion 103. The positioning body 104 protrudes axially toward the yoke portion 202. It is possible that only one of the second covering portions 103 is connected to one positioning body 104, or only one of the second covering portions 103 is connected to multiple positioning bodies 104, or each second covering portion 103 is connected to one positioning body 104 (e.g., Figure 1 As shown), each second covering portion 103 may be connected to a plurality of positioning bodies 104. The second covering portion 103 has an opposite surface, and the opposite surface refers to a side surface of the second covering portion 103 facing another second covering portion 103; for example, Figure 1 The second covering portion 103 is located above, and the opposite surface is the lower surface of the second covering portion 103; Figure 1 The second covering portion 103 at the lower middle portion has an opposite surface which is an upper surface of the second covering portion 103. The positioning body 104 is connected to the opposite surface and protrudes from the opposite surface.

[0049] Combine Figure 1 、 Figure 5 、 Figure 7 and Figure 8 The yoke 202 has a positioning hole 204 for the positioning body 104 to penetrate. The hole wall of the positioning hole 204 can abut against the outer surface of the positioning body 104, thereby preventing the insulating frame 100 from moving radially along the yoke 202 and separating from the stator core 201.

[0050] Or, refer to Figure 11 A positioning groove 209 can be provided on the edge of the yoke 202 away from the teeth 203. The insulating frame 100 can be fixed by snapping the positioning body 104 into the positioning groove 209. The wall of the positioning groove 209 abuts against the positioning body 104, thereby preventing the insulating frame 100 from moving radially along the yoke 202.

[0051] Alternatively, the positioning hole or positioning groove 209 is not provided on the stator core 201, and the positioning body 104 is directly clamped on the edge of the yoke 202 away from the tooth portion 203. That is, along the radial direction of the yoke 202, the surface of the positioning body 104 facing the tooth portion through-cavity 105 abuts against the side of the yoke 202 away from the tooth portion 203. It can also be understood that the positioning body 104 and the first covering portion 102 clamp the yoke 202 along the radial direction of the yoke 202. If Figure 10 or Figure 11 For example, the edge of the yoke 202 away from the teeth 203 refers to the rear edge of the yoke 202. It should be noted that in the motor, the stator assembly 200 needs to be mounted on a bracket (not shown). If the positioning body 104 is stuck on the edge of the yoke 202 away from the teeth 203, the positioning body 104 may interfere with the bracket. To avoid interference between the positioning body 104 and the bracket, a slot or hole needs to be provided on the bracket to allow for the positioning body 104 to pass through.

[0052] The positioning body 104 can be configured to be cylindrical, elliptical, prism, conical, spherical, triangular boss, trapezoidal boss, etc. Correspondingly, the shape of the positioning hole 204 or the positioning groove 209 matches the shape of the positioning body 104 .

[0053] The insulating frame 100 includes a positioning body 104, which is connected to a second covering portion 103, which covers the axial end surface of the yoke 202. After the insulating frame 100 is assembled with the stator core 201, the contact between the positioning body 104 and the stator core 201 prevents the insulating frame 100 from moving radially along the yoke 202, thereby preventing the insulating frame 100 from loosening or falling off. Once installed, the insulating frame 100 is not easily moved radially along the yoke 202, and the effective fixation between the insulating frame 100 and the stator core 201 is improved, which helps to improve the safety of the stator assembly 200.

[0054] It should be noted that the insulating frame 100 of the present invention is not only applicable to the stator core 201 without a shoe portion, but also applicable to the stator core 201 with a tooth shoe separation design.

[0055] In some embodiments, in order to increase the coverage area of ​​the stator core 201 by the insulating frame 100 and thus improve the safety of the stator assembly 200, two first covering parts 102 and two second covering parts 103 are provided. The two first covering parts 102 are respectively connected to the two sides of the tooth covering body 101, and the two second covering parts 103 are respectively connected to the two ends of the first covering part 102 and the two ends of the first covering part 102 along the axial direction of the yoke 202. The second covering part 103 protrudes relative to the first covering part 102 in the direction away from the tooth covering body 101. Figure 1 The two second covering parts 103 are spaced apart, and the space enclosed by the first covering part 102 and the two second covering parts 103 is a yoke through-hole 109. The yoke through-hole 109 is used to accommodate the yoke 202 of the stator core 201.

[0056] Reference Figure 10 In some embodiments, the stator core 201 has a boot 205 and adopts a tooth-shoe separation design. The boot 205 is connected to the end of the tooth 203 away from the yoke 202. More specifically, the mounting body 206 at the end of the tooth 203 can be embedded in the mounting groove 207 of the boot 205, thereby achieving the connection between the boot 205 and the tooth 203. If the insulating frame 100 is used for a stator core 201 without a boot 205, the insulating frame 100 can be directly put on the tooth 203. If the insulating frame 100 is used for a stator core 201 with a tooth-shoe separation design, during the process of assembling the stator core 201, it is necessary to first put the insulating frame 100 on the tooth 203, and then assemble the tooth 203 and the boot 205.

[0057] Providing the positioning body 104 on the insulating frame 100 and the positioning hole 204 (or positioning slot 209) on the stator core 201 reduces the manufacturing process complexity and helps reduce costs. Furthermore, the insulating frame 100 is fixed by snapping the positioning body 104 into the positioning hole 204, which simplifies the process and is highly convenient, which helps improve the production efficiency of the stator assembly 200. Furthermore, the wall of the positioning hole 204 or the wall of the positioning slot 209 not only hinders the radial movement of the positioning body 104 along the yoke 202, but also has a certain hindering effect on the circumferential movement of the positioning body 104 along the yoke 202. Relatively speaking, providing the positioning hole 204 on the stator core 201 effectively constrains the circumferential movement of the insulating frame 100. Providing the positioning slot 209 on the stator core 201 reduces the hollowed-out area of ​​the stator core 201, thereby enhancing the structural strength of the stator core 201.

[0058] The lengths of the positioning bodies 104 connected to different second covering portions 103 may be the same or different. The length of the positioning body 104 herein refers to the maximum protruding distance of the positioning body 104 relative to the second covering portion 103 .

[0059] Reference Figure 7 and Figure 8 When both second covering portions 103 are connected to positioning bodies 104, the positioning holes 204 can be configured as counterbores or through-holes. The length of the positioning bodies 104 is denoted as L1, and the depth of the positioning holes 204 is denoted as L2. In some embodiments, L1 ≤ L2 can be set to prevent the second covering portions 103 from warping.

[0060] Taking the case where the positioning hole 204 is a countersunk hole as an example, if L2 <L1,则定位体104的凸出端会与定位孔204的最深处的壁面抵持,定位体104无法完全嵌入至定位孔204中,与定位体104连接的第二覆盖部103也会处于弯曲、翘起的状态。这样容易造成第二覆盖部103或者绝缘框架100损坏,同时翘起的第二覆盖部103与轭部202的轴向端面之间具有一定的间隙,这样的话存在一个可以让漆包线进入并与定子铁芯201接触的间隙,存在一定的绝缘失效风险。因此,设置L1≤L2,可以避免第二覆盖部103翘起,避免绝缘框架100损坏,以及降低绝缘失效的风险。

[0061] Similarly, if the stator core 201 is provided with a positioning groove 209, the axial length of the positioning groove 209 along the yoke 202 can be made not less than the length of the positioning body 104, thereby avoiding damage to the insulating frame 100 and reducing the risk of insulation failure. Figure 12 The length of the positioning groove 209 along the axial direction of the yoke 202 is L3, and L1≤L3.

[0062] In addition, in some embodiments, the length of the positioning body 104 satisfies 0.5mm≤L1≤2.5mm. If the length of the positioning body 104 is less than 0.5mm, the side area of ​​the positioning body 104 is too small, and it is difficult to achieve the positioning effect between the positioning body 104 and the stator core 201. Since the positioning body 104 will press against the surface of the tooth portion 203 or the yoke portion 202 during the installation of the insulating frame 100, if the length of the positioning body 104 is greater than 2.5mm, the second covering portion 103 connected to the positioning body 104 will need to be deformed to a large extent during the installation process. In the case that the elasticity of the insulating frame 100 itself is poor, this can easily cause damage to the insulating frame 100. Therefore, setting 0.5mm≤L1≤2.5mm can reduce the risk of damage to the insulating frame 100 while ensuring the positioning effect.

[0063] In some embodiments, along the circumferential direction of the yoke portion 202, one end of the first covering portion 102 has the accommodating groove 112, and the other end of the first covering portion 102 has the shielding portion 107 (the second covering portion 103 is connected to the end of the first covering portion 102 along the axial direction of the yoke portion 202). Referring to Figures 3 to 5 The stator assembly 200 includes the stator core 201 and a plurality of insulation frames 100, and each insulation frame 100 is connected with a tooth portion 203. Along the circumferential direction of the yoke portion 202, any two adjacent insulation frames 100 are spliced with each other. Referring to Figure 6 For two adjacent insulation frames 100, the shielding portion 107 of one insulation frame 100 is arranged in the accommodating groove 112 of the other insulation frame 100 and shields the wall surface of the accommodating groove 112.

[0064] The gap between the two adjacent insulation frames 100 is mainly the gap between the end edge of the shielding portion 107 and the wall surface of the accommodating groove 112. Even if the enameled wire extends into this gap, the enameled wire can only contact the wall surface of the accommodating groove 112 and cannot directly contact the stator core 201. From another perspective, the wall surface of the accommodating groove 112 is relatively tortuous, which can increase the creepage distance between the winding 301 and the radial end surface of the yoke portion 202, thereby improving the safety of the stator assembly 200.

[0065] Referring to Figure 1 Or Figure 2 In some embodiments, the insulation frame 100 further includes a limiting body 106 connected to the end of the tooth portion covering body 101 away from the yoke portion covering body 108. The inner edge of the limiting body 106 is connected with the tooth portion covering body 101, and the outer edge of the limiting body 106 protrudes relative to the outer surface of the tooth portion covering body 101. The side surface of the limiting body 106 facing the yoke portion covering body 108 can abut against the winding 301, thereby limiting the winding 301 and avoiding the winding 301 from falling off the tooth portion covering body 101. In addition, for the stator core 201 adopting the tooth-shoe separation design, the limiting body 106 can also avoid the winding 301 from contacting the side surface of the shoe portion 205 facing the yoke portion 202, thereby meeting the insulation requirement between the winding 301 and the stator core 201. Referring to Figure 1 Or Figure 2 In some embodiments, the outer edge of the limiting body 106 further has a wire passing notch 110, and the enameled wire can be clamped into the wire passing notch 110, and the wall surface of the wire passing notch 110 can fix the end of the enameled wire (including the beginning winding end and the end winding end of the enameled wire).

[0066] Referring to Figure 2 In some embodiments, the outer surface of the tooth portion covering body 101 has a plurality of wire grooves 111 arranged on the opposite sides of the tooth portion covering body 101 (for example Figure 2 The wire groove 111 can be used to accommodate the enameled wire. The wall surface of the wire groove 111 can abut against the enameled wire, thereby positioning the enameled wire, improving the neatness of the enameled wire, and increasing the slot fill rate of the enameled wire.

[0067] The stator core 201 can be formed by laminating a plurality of punching sheets 401 (punching sheets 401 are stamped from silicon steel sheets), or by casting, CNC machining of magnetic conductive materials, etc. Forming the stator core 201 by laminating punching sheets 401 is relatively easy and less expensive.

[0068] For Figure 5 The shape of the stator core 201 and the punching sheet 401 can be as follows: Figure 9 As shown. The punching sheet 401 includes a transverse portion 403 and a plurality of longitudinal portions 402, and the longitudinal portions 402 are spaced apart. The transverse portion 403 corresponds to the yoke portion 202 in the stator core 201, and the longitudinal portion 402 corresponds to the tooth portion 203 in the stator core 201. If the positioning hole 204 is provided on the yoke portion 202 of the stator core 201, then the transverse portion 403 also needs to be provided with a corresponding hole. Figure 9 The transverse portion 403 has a preset hole 404 . After the multiple punching sheets 401 are stacked on each other, the multiple preset holes 404 are interconnected to form the positioning hole 204 .

[0069] It should be noted that if the positioning hole 204 is a through hole, the shapes of all the punching sheets 401 forming the stator core 201 can be set to be the same. If the positioning hole 204 is a countersunk hole, only a part of the punching sheets 401 should be set to be Figure 9 In the shape shown, the other portion of the punching sheet 401 also has a transverse portion 403 and a longitudinal portion 402 , but is not provided with a preset hole 404 .

[0070] When stamping a silicon steel sheet and punching out a plurality of punching sheets 401, the method can be used. Figure 9 The arrangement in the middle is to improve the material utilization. The distance between adjacent longitudinal parts 402 is not less than 0.5mm (L4≥0.5mm) to ensure the accuracy of the shape of the punching sheet 401. Figure 9 After punching the sheet 401 as shown, the sheet 401 needs to be wound on a mold to bend the sheet 401 into a ring shape, and then the sheet 401 is stacked.

[0071] The present invention also provides a motor, which includes the stator assembly 200 in the above embodiment. In addition to the stator assembly 200, the motor also includes a rotor assembly. If the stator assembly 200 in the motor is as Figure 3As shown, the motor is an outer rotor motor, and the rotor assembly is arranged on the periphery of the stator assembly 200. If the teeth 203 of the stator core 201 of the winding 301 are arranged on the inner side of the yoke 202, then the motor is an inner rotor motor, and the stator assembly 200 is arranged on the periphery of the rotor assembly. The inner side of the yoke 202 refers to the side of the yoke 202 that is closer to its own center along the radial direction of the yoke 202. In the motor provided by the present invention, the insulating frame 100 is not easy to move along the radial direction of the yoke 202, the fixing effect between the insulating frame 100 and the stator core 201 is good, the insulating frame 100 is not easy to loosen or fall off, and the operation safety of the motor is relatively high.

[0072] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. Stator assembly, characterized in that, include: The stator core includes a yoke and a plurality of teeth, wherein the yoke is annular, and the teeth are connected to the yoke and protrude radially from the yoke. An insulating frame, wherein each tooth portion is connected to an insulating frame, the insulating frame includes a tooth portion covering body and a yoke portion covering body, the tooth portion covering body covers the tooth portion, the yoke portion covering body is connected to one end of the tooth portion covering body, the yoke portion covering body includes two first covering parts and at least one second covering part, the first covering part covers a side surface of the yoke portion facing the tooth portion, and the second covering part covers an axial end surface of the yoke portion; the two first covering parts are placed on both sides of the tooth portion covering body, along the circumference of the yoke portion, the end of one of the first covering parts has a receiving groove, and the end of the other first covering part has a shielding part; in two adjacent insulating frames, the shielding part of one insulating frame can be received in the receiving groove of the other insulating frame; A positioning body is provided on the second covering portion and protrudes axially toward the yoke portion. The positioning body abuts against the yoke portion to prevent the insulating frame from falling off the stator core.

2. The stator assembly according to claim 1, characterized in that The length of the positioning body is L1, which satisfies: 0.5mm≤L1≤2.5mm.

3. The stator assembly according to claim 1, characterized in that The insulating frame also includes a limiter connected to one end of the tooth covering body away from the yoke covering body; the inner edge of the limiter is connected to the outer surface of the tooth covering body, and the outer edge of the limiter protrudes relative to the outer surface of the tooth covering body.

4. The stator assembly according to claim 3, characterized in that The outer edge of the limiting body is provided with a line notch.

5. The stator assembly according to claim 1, characterized in that Two oppositely disposed outer surfaces of the tooth covering body are each provided with a plurality of wire grooves.

6. The stator assembly according to claim 1, characterized in that Two second covering parts are provided. The two second covering parts are placed at both ends of the first covering part along the axial direction of the yoke part. The second covering parts protrude relative to the first covering part in a direction away from the tooth covering body.

7. The stator assembly according to claim 1, characterized in that The yoke has a positioning hole, and the positioning body is arranged in the positioning hole.

8. The stator assembly according to claim 7, characterized in that The depth of the positioning hole is L2, and the length of the positioning body is L1, satisfying: L1≤L2.

9. The stator assembly according to claim 1, wherein: Along the radial direction of the yoke, a side edge of the yoke away from the tooth portion has a positioning groove, and the positioning body is arranged in the positioning groove.

10. The stator assembly according to claim 9, characterized in that The axial length of the positioning groove along the yoke is L3, and the length of the positioning body is L1, satisfying L1≤L3.

11. The stator assembly according to claim 1, wherein: Along the radial direction of the yoke, the positioning body abuts against a side of the yoke away from the tooth portion.

12. The motor is characterized in that Comprising the stator assembly according to any one of claims 1 to 11.

Images