Insulation framework, stator assembly, motor and water pump

Abstract

The water pump comprises the motor and an impeller assembly, the stator assembly comprises the insulating framework, an iron core and a winding, the insulating framework comprises a framework body and an inserting part, the framework body comprises a framework cylinder, framework tooth tips and a framework yoke part, the inserting part is connected to the framework body and located at one end of the framework cylinder, and the inserting part is connected with the iron core and located at the other end of the framework cylinder. The framework tooth tips and the framework yoke parts are arranged in a one-to-one correspondence mode, the framework yoke parts are arranged in the circumferential direction of the framework cylinder at intervals and extend in the radial direction of the framework cylinder, one end of each framework yoke part is connected with the inner wall of the framework cylinder, and the other end of each framework yoke part is connected with the corresponding second side face; the second side face comprises a straight face and two curved faces located on the two sides of the straight face and extending in the circumferential direction of the framework cylinder, and the framework tooth tip is thin in the middle and thick on the two sides. Through the arrangement, the extrusion force of the winding on the skeleton tooth tip is dispersed to the two sides, the middle stress of the skeleton tooth tip is reduced, the extrusion deformation is reduced, and the fracture probability is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump technical field especially relates to an insulation framework, stator assembly, motor and water pump. BACKGROUND

[0002] In the motor, the insulation framework can fix and arrange the enameled wire, and can block the enameled wire from sliding. The tooth tip side of the existing insulation framework is arc-shaped, and the tooth tip thickness is thin in the middle and thick on both sides, which makes the extrusion force of the wound enameled wire on the insulation framework at the middle position of the tooth tip. For the motor with thick wire diameter or too high number of winding turns, the insulation framework is easy to be extruded and deformed or even broken. After the deformation of the insulation framework, the insulation framework will contact the rotor, generate a large noise, even burn the motor, and affect the service life of the motor.

[0003] Therefore, an insulation framework, stator assembly, motor and water pump are needed to solve the above technical problems. SUMMARY

[0004] The first purpose of the utility model is to provide an insulation framework to solve at least one of the above problems.

[0005] To achieve the above purpose, the utility model provides an insulation framework, which comprises

[0006] The framework body comprises:

[0007] The framework cylinder;

[0008] The framework tooth tip, the number of which is multiple, each of the framework tooth tips has a first side and a second side, and the first side and the second side are oppositely arranged; and

[0009] The framework yoke part is arranged one-to-one corresponding to the framework tooth tip, and the multiple framework yoke parts extend inward along the radial direction of the framework cylinder respectively, and the multiple framework yoke parts are arranged at intervals along the circumferential direction of the framework cylinder. One end of each of the framework yoke parts is connected with the inner wall of the framework cylinder, and the other end is connected with the second side of the corresponding framework tooth tip;

[0010] The first side of the multiple framework tooth tips surrounds to form a first rotor cavity for the rotation of the rotor, the first side is a circular arc surface, the second side comprises a straight surface and two curved surfaces located on both sides of the straight surface and extending along the circumferential direction of the framework cylinder, and the thickness of the framework tooth tip is thin in the middle and thick on both sides;

[0011] The insertion part is connected to the framework body, and the insertion part is located at one end of the framework cylinder.

[0012] Further, the plug-in part comprises a plug-in body, an outer surface of the plug-in body is provided with a buckle, and the buckle is used for clamping with a clamping groove formed on the iron core.

[0013] Further, the plug-in body comprises an arc-shaped plate, a first side plate and a second side plate, the arc-shaped plate is connected with the inner wall of the skeleton cylinder and located between two adjacent skeleton yoke parts, the first side plate is arranged on the two sides of the arc-shaped plate along the radial direction of the skeleton cylinder, the end of each first side plate is connected with the second side plate, the two first side plates are connected with the two opposite side surfaces of the two adjacent skeleton yoke parts respectively, and the connecting ends of the two second side plates are connected with the two side surfaces of the two adjacent skeleton tooth tips arranged symmetrically.

[0014] Further, the free end of each second side plate is provided with a baffle, and the baffle is used for blocking the enameled wire from contacting the iron core.

[0015] Further, the connecting position of the skeleton yoke part and the second side surface is provided with a first fillet transition part, and the curvature radius of the first fillet transition part is 1mm-2.5mm.

[0016] Further, the curvature radius of the first fillet transition part is 2mm.

[0017] The second object of the utility model is to provide a stator assembly to at least solve one of the above problems.

[0018] In order to achieve the above object, the utility model provides a stator assembly, which comprises:

[0019] An iron core, wherein a lip is formed on the iron core;

[0020] The insulation skeleton according to any one of the above schemes, wherein the plug-in part is plugged into the lip;

[0021] A winding formed by winding an enameled wire on the skeleton yoke part and the iron core.

[0022] The third object of the utility model is to provide a motor to at least solve one of the above problems.

[0023] In order to achieve the above object, the utility model provides a motor, which comprises the stator assembly according to any one of the above schemes.

[0024] The fourth object of the utility model is to provide a water pump to at least solve one of the above problems.

[0025] In order to achieve the above object, the utility model provides a water pump, which comprises:

[0026] A impeller assembly;

[0027] The motor of any one of the above solutions drives the rotation of the impeller assembly.

[0028] The utility model discloses the beneficial effect that:

[0029] The utility model provides a water pump includes motor and impeller component, motor drives the rotation of impeller component, and motor includes stator component, and stator component includes insulating framework, iron core and winding, is provided with the lip on the iron core, and insulating framework includes framework body and plug -in part, and framework body includes framework cylinder, framework tooth tip and framework yoke part, and plug -in part is connected in framework body, and plug -in part is located one end of framework cylinder, and plug -in part is inserted in the lip, and the enameled wire is wound on framework yoke part and iron core and forms winding, and the number of framework tooth tip is a plurality, and every framework tooth tip has first side and second side, and first side and second side are oppositely arranged, and framework tooth tip is set up one to one with framework yoke part, and a plurality of framework yoke parts are spaced apart along the circumference of framework cylinder respectively, and a plurality of framework yoke parts extend inward along the radial direction of framework cylinder respectively, and one end of every framework yoke part is connected with the inner wall of framework cylinder, and the other end is connected with the second side on the corresponding framework tooth tip, wherein, the first side of a plurality of framework tooth tips surrounds and forms the first rotor cavity for the rotation of rotor, and the first side is arc surface, and the second side includes straight surface and two curved surfaces located on both sides of straight surface and extending along the circumference of framework cylinder, and the thickness of framework tooth tip is thin in the middle and thick on both sides. The second side of framework tooth tip is combined through straight surface and curved surface, and the thickness of framework tooth tip is thin in the middle and thick on both sides, increase the strength of framework tooth tip, make the extrusion force of winding to framework tooth tip not concentrate in the middle of framework tooth tip, can be dispersed to both sides of framework tooth tip, reduce the stress in the middle of framework tooth tip, reduce the extrusion deformation of insulating framework, reduce the probability of insulating framework fracture, further reduce the risk of contact with rotor due to the deformation of insulating framework, reduce noise, avoid burning motor, prolong the service life of motor, further prolong the service life of water pump. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the structure schematic diagram of the first angle of insulating framework provided by the utility model embodiment;

[0031] Figure 2 It is the structure schematic diagram of the second angle of insulating framework provided by the utility model embodiment;

[0032] Figure 3 It is the structure schematic diagram of the third angle of insulating framework provided by the utility model embodiment;

[0033] Figure 4 It is Figure 3 It is the local enlarged view of A in middle;

[0034] Figure 5 It is the structure schematic diagram when installing insulating framework and iron core provided by the utility model embodiment;

[0035] Figure 6 is Figure 5 is a local enlarged view at B in figure 1;

[0036] Figure 7 is an exploded view of the insulation framework and the iron core provided by the embodiment of the present application;

[0037] Figure 8 is a structural schematic view of the iron core provided by the embodiment of the present application;

[0038] Figure 9 is a stress nephogram of simulation analysis of the insulation framework in the prior art;

[0039] Figure 10 is a stress nephogram of simulation analysis of the framework tooth tip of the insulation framework in the first fillet transition part with a curvature radius of 2mm and an intermediate thickness of 3.18mm provided by the embodiment of the present application;

[0040] Figure 11 is a stress nephogram of simulation analysis of the framework tooth tip of the insulation framework in the first fillet transition part with a curvature radius of 0.5mm and an intermediate thickness of 3.18mm provided by the embodiment of the present application;

[0041] Figure 12 is a stress nephogram of simulation analysis of the framework tooth tip of the insulation framework in the first fillet transition part with a curvature radius of 2mm and an intermediate thickness of 2.68mm provided by the embodiment of the present application;

[0042] Figure 13 is a stress nephogram of simulation analysis of the framework tooth tip of the insulation framework in the first fillet transition part with a curvature radius of 2mm and an intermediate thickness of 5.18mm provided by the embodiment of the present application.

[0043] In the figure:

[0044] 100, insulation framework; 200, iron core; 201, lip; 202, iron core tooth part; 203, iron core yoke part; 204, iron core body; 205, clamping groove; 206, second rotor cavity; 207, second fillet transition part; 300, rotor cavity;

[0045] 1, framework cylinder; 2, framework tooth tip; 3, framework yoke part; 4, baffle; 5, first fillet transition part; 6, plug-in part; 7, first rotor cavity;

[0046] 21, straight surface; 22, curved surface; 23, arc surface; 24, tooth tip bottom surface; 31, yoke part bottom surface; 61, arc plate; 62, first side plate; 63, second side plate; 64, buckle. DETAILED DESCRIPTION

[0047] The technical solutions of the utility model are further illustrated below in combination with the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are merely used to explain the utility model, and do not limit the utility model. In addition, it should be noted that, for the convenience of description, only parts related to the utility model are shown in the drawings, not all.

[0048] Some orientation words are limited in the utility model, and the orientation words such as 'up', 'down', 'left', 'right', 'inner', 'outer' are used for the convenience of understanding without making the opposite description, thus not constituting the limitation of the protection scope of the utility model.

[0049] In the utility model, unless explicitly specified and limited, the 'upper' or 'lower' of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the 'upper', 'upper side' and 'upper surface' of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The 'lower', 'lower side' and 'lower surface' of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0050] In the description of the utility model, unless explicitly specified and limited, the terms 'connected', 'connected', 'fixed' should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0051] As Figures 1-4As shown, the embodiment provides an insulation framework 100, which comprises a framework body and a plug-in part 6. The framework body comprises a framework cylinder 1, framework tooth tips 2 and framework yoke parts 3. The plug-in part 6 is connected to the framework body and is located at one end of the framework cylinder 1. The number of the framework tooth tips 2 is multiple. Each framework tooth tip 2 has a first side and a second side, which are oppositely arranged. The framework tooth tips 2 are arranged in one-to-one correspondence with the framework yoke parts 3. The multiple framework yoke parts 3 are respectively arranged along the circumference of the framework cylinder 1 and respectively extend inwardly along the radial direction of the framework cylinder 1. One end of each framework yoke part 3 is connected to the inner wall of the framework cylinder 1, and the other end is connected to the second side of the corresponding framework tooth tip 2. The first sides of the multiple framework tooth tips 2 surround to form a first rotor cavity 7 for the rotation of the rotor. The first side is a circular arc surface 23. The second side comprises a straight surface 21 and two curved surfaces 22 located on both sides of the straight surface 21 and extending along the circumference of the framework cylinder 1. The thickness of the framework tooth tip 2 is thin in the middle and thick on both sides. The second side of the framework tooth tip 2 is combined through the straight surface 21 and the curved surfaces 22, and the thickness of the framework tooth tip 2 is thin in the middle and thick on both sides, which increases the strength of the framework tooth tip 2, so that the extrusion force of the winding on the framework tooth tip 2 is no longer concentrated in the middle of the framework tooth tip 2, but is dispersed to both sides of the framework tooth tip 2, reducing the stress in the middle of the framework tooth tip 2, reducing the extrusion deformation of the insulation framework 100, reducing the probability of fracture of the insulation framework 100, thereby reducing the risk of contact with the rotor due to the deformation of the insulation framework 100, reducing noise, avoiding burning out of the motor, prolonging the service life of the motor, and further prolonging the service life of the water pump.

[0052] In the embodiment, the middle thickness of the framework tooth tip 2 is 3-5 mm, and the thickness on both sides is 4-6 mm. When the size of the framework tooth tip 2 is within the above range, the extrusion force of the framework tooth tip 2 by the enameled wire is reduced to prevent the deformation or fracture of the framework tooth tip 2.

[0053] Preferably, the middle thickness of the framework tooth tip 2 is 3.18 mm.

[0054] Further, the plug-in part 6 comprises a plug-in body, and the outer surface of the plug-in body is provided with a buckle 64 for clamping with a clamping groove 205 formed on the iron core 200.

[0055] Furthermore, the insertion body includes an arc-shaped plate 61, a first side plate 62, and a second side plate 63. The second side plate 63 has a connecting end and a free end. The arc-shaped plate 61 is connected to the inner wall of the skeleton cylinder 1 and is located between two adjacent skeleton yokes 3. The first side plates 62 are respectively arranged on both sides of the arc-shaped plate 61 along the radial direction of the skeleton cylinder 1. The end of each first side plate 62 is connected to a second side plate 63. The two first side plates 62 are respectively connected to the two opposite sides of the two adjacent skeleton yokes 3. The connecting ends of the two second side plates 63 are respectively connected to the two symmetrically arranged sides of the two adjacent skeleton tooth tips 2.

[0056] Specifically, the skeleton cylinder 1 has a cylindrical bottom surface, and the edge connecting the cylindrical bottom surface and the inner wall of the skeleton cylinder 1 is an arc-shaped edge. An arc-shaped plate 61 is connected to the arc-shaped edge. The skeleton yoke 3 has a yoke bottom surface 31. The edges connecting the two opposite sides of two adjacent skeleton yokes 3 to the corresponding yoke bottom surface 31 are all first edges. Two first side plates 62 are connected to the corresponding first edges. The skeleton tooth tip 2 has a tooth tip bottom surface 24. The edge connecting the tooth tip bottom surface 24 to the second side surface is a second edge. There are two second edges, which are respectively disposed on both sides of the skeleton yoke 3. Two second edges symmetrically disposed on two adjacent skeleton tooth tips 2 are respectively connected to two second side plates 63 to form an insertion body.

[0057] In this embodiment, the buckle 64 is disposed on the arc-shaped plate 61.

[0058] Furthermore, each of the second side plates 63 is provided with a baffle 4 at its free end. The baffle 4 is used to prevent the enameled wire from contacting the iron core 200. The baffle 4 can prevent insufficient creepage distance between the enameled wire and the iron core 200, or even direct contact between the enameled wire and the iron core 200, due to the large diameter of the enameled wire or the excessive number of turns of the winding, thereby preventing damage to the motor.

[0059] like Figures 5-8 As shown, this embodiment also provides a stator assembly, which includes an insulating frame 100, an iron core 200, and windings. The iron core 200 has a lip 201, and a plug-in part 6 is plugged into the lip 201. Enamelled wire is wound around the frame yoke 3 and the iron core 200 to form windings. The straight surface 21 and curved surface 22 on the frame tooth tip 2 of the insulating frame 100 disperse the compressive force of the winding on the frame tooth tip 2 to both sides of the frame tooth tip 2, reducing the force on the middle of the frame tooth tip 2, reducing the compressive deformation of the insulating frame 100, reducing the probability of the insulating frame 100 breaking, thereby reducing the risk of contact with the rotor caused by the deformation of the insulating frame 100, reducing noise, avoiding motor burnout, extending the service life of the motor, and thus extending the service life of the water pump.

[0060] Further, the iron core 200 comprises the iron core tooth portion 202, the iron core yoke portion 203, and the iron core body 204, the iron core body 204 is in a circular ring shape, along the circumferential direction of the iron core body 204, a plurality of iron core yoke portions 203 are arranged on the inner wall of the iron core body 204 at intervals, each iron core yoke portion 203 is connected with the iron core tooth portion 202, the connecting position of the iron core tooth portion 202 and the iron core yoke portion 203 is provided with a second round corner transition portion 207, the curvature radius of the first round corner transition portion 5 is greater than the curvature radius of the second round corner transition portion 207. Such a setting makes that the enameled wire can also be wound on the first round corner transition portion 5, increases the wire arranging distance and the winding length of the enameled wire, increases the slot fill factor, at the same time, reduces the extrusion force of the winding on the insulation skeleton 100, reduces the extrusion deformation of the insulation skeleton 100, and reduces the probability of the insulation skeleton 100 breaking.

[0061] Further, the inner wall of the lip 201 is provided with a clamping groove 205, and the buckle 64 is clamped in the clamping groove 205. When the insertion portion 6 of the insulation skeleton 100 is inserted into the lip 201 of the iron core 200, the iron core yoke portion 203 and the skeleton yoke portion 3 are arranged opposite to each other, the enameled wire is wound on the iron core yoke portion 203 and the skeleton yoke portion 3, the wire arranging direction of the enameled wire is along the length direction of the iron core yoke portion 203 and the skeleton yoke portion 3, the length direction of the iron core yoke portion 203 and the skeleton yoke portion 3 is the radial direction of the skeleton cylinder 1, and the wire arranging is performed between the second side surface and the inner wall of the skeleton cylinder 1.

[0062] Further, the side surface of each iron core tooth portion 202 surrounds to form a second rotor cavity 206, when the insertion portion 6 of the insulation skeleton 100 is inserted into the lip 201 of the iron core 200, the first rotor cavity 7 and the second rotor cavity 206 are arranged opposite to each other, and together form a rotor cavity chamber 300, the rotor cavity chamber 300 provides space for the rotation of the rotor.

[0063] Further, the embodiment also provides an electric machine, the electric machine comprises the above-mentioned stator assembly and a rotor, and the rotor is rotatably arranged in the rotor cavity chamber 300. The arrangement of the stator assembly can reduce the risk of contact with the rotor caused by the deformation of the insulation skeleton 100, reduce noise, avoid burning the electric machine, and prolong the service life of the electric machine.

[0064] Further, the embodiment also provides a water pump, the water pump comprises the above-mentioned electric machine and an impeller assembly, and the electric machine drives the rotation of the impeller assembly. The arrangement of the electric machine can prolong the service life of the water pump.

[0065] Figure 9 The stress cloud diagram for the simulation analysis of the existing insulation skeleton 100 in the prior art, the skeleton tooth tip side surface of the existing insulation skeleton is in a circular arc shape, and the thickness of the skeleton tooth tip is thin on both sides and thick in the middle. As shown from the stress cloud diagram, the maximum extrusion stress of the winding on the insulation skeleton is 116.06 MPa, and the extrusion stress of the winding on the insulation skeleton is concentrated on the middle position of the skeleton tooth tip. Figure 10The stress nephogram of the skeleton tooth tip 2 of the insulation skeleton 100 provided in the embodiment is simulated and analyzed when the curvature radius of the first fillet transition part 5 is 2mm and the intermediate thickness is 3.18mm. As can be known from the stress nephogram, the maximum extrusion stress of the winding on the insulation skeleton 100 is 67.335MPa, and the extrusion stress of the winding on the insulation skeleton 100 is partially dispersed to the two sides of the skeleton tooth tip 2 of the insulation skeleton 100, and the extrusion stress of the two sides of the skeleton tooth tip 2 is 9.8449MPa-29.008MPa. Figure 9 and Figure 10 By comparison, it can be known that the insulation skeleton 100 provided in the embodiment can reduce the extrusion stress of the winding, so as to verify the effectiveness of the stress analysis of the insulation skeleton 100 provided in the embodiment.

[0066] Further, the connection position of the skeleton yoke part 3 and the second side surface is provided with the first fillet transition part 5, and the curvature radius of the first fillet transition part 5 is 1mm-2.5mm.

[0067] Preferably, the curvature radius of the first fillet transition part 5 is 2mm.

[0068] Figure 11 The stress nephogram of the skeleton tooth tip 2 of the insulation skeleton 100 provided in the embodiment is simulated and analyzed when the curvature radius of the first fillet transition part 5 is 0.5mm and the intermediate thickness is 3.18mm. As can be known from the stress nephogram, the maximum extrusion stress of the winding on the insulation skeleton 100 is 100.95MPa. Figure 10 and Figure 11 By comparison, it can be verified that the extrusion stress of the insulation skeleton 100 is smaller when the curvature radius of the first fillet transition part 5 of the insulation skeleton 100 provided in the embodiment is 2mm.

[0069] Figure 12 The stress nephogram of the skeleton tooth tip 2 of the insulation skeleton 100 provided in the embodiment is simulated and analyzed when the curvature radius of the first fillet transition part 5 is 2mm and the intermediate thickness is 2.68mm. As can be known from the stress nephogram, the maximum extrusion stress of the winding on the insulation skeleton 100 is 72.045MPa. Figure 13 The stress nephogram of the skeleton tooth tip 2 of the insulation skeleton 100 provided in the embodiment is simulated and analyzed when the curvature radius of the first fillet transition part 5 is 2mm and the intermediate thickness is 5.18mm. As can be known from the stress nephogram, the maximum extrusion stress of the winding on the insulation skeleton 100 is 71.258MPa. Figure 12 and Figure 13 respectively, Figure 10 By comparison, it can be verified that the extrusion stress of the insulation skeleton 100 is smaller when the intermediate thickness of the skeleton tooth tip 2 of the insulation skeleton 100 provided in the embodiment is 3.18mm.

[0070] In the embodiment, the middle thickness of the skeleton tooth tip 2 refers to the minimum distance between the straight surface 21 and the first side surface. Although the utility model has been described in detail above with general description, specific embodiments and experiments, it is obvious for those skilled in the art to make some modifications or improvements on the basis of the utility model. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model all belong to the scope of protection required by the utility model.

Claims

1. An insulating frame, characterized in that, The skeleton body includes a frame body and a connector (6), wherein the frame body includes: Skeleton cylinder (1); Multiple skeleton tooth tips (2) are provided, each having a first side surface and a second side surface, the first side surface and the second side surface being disposed opposite to each other; and The skeleton yoke (3) is provided in a one-to-one correspondence with the skeleton tooth tip (2). The multiple skeleton yokes (3) extend radially inward along the skeleton cylinder (1) and are spaced apart circumferentially along the skeleton cylinder (1). One end of each skeleton yoke (3) is connected to the inner wall of the skeleton cylinder (1), and the other end is connected to the second side surface on the corresponding skeleton tooth tip (2). The first side of the plurality of skeleton tooth tips (2) surrounds the first rotor cavity (7) for the rotor to rotate. The first side is an arc surface (23). The second side includes a straight surface (21) and two curved surfaces (22) located on both sides of the straight surface (21) extending circumferentially along the skeleton cylinder (1). The thickness of the skeleton tooth tips (2) is thin in the middle and thick at both sides. The plug-in part (6) is connected to the skeleton body, and the plug-in part (6) is located at one end of the skeleton cylinder (1).

2. The insulating frame according to claim 1, characterized in that, The plug-in part (6) includes a plug-in body, and the outer surface of the plug-in body is provided with a buckle (64), which is used to engage with the slot (205) opened on the iron core (200).

3. The insulating frame according to claim 2, characterized in that, The plug-in body includes an arc-shaped plate (61), a first side plate (62), and a second side plate (63). The arc-shaped plate (61) is connected to the inner wall of the skeleton cylinder (1) and is located between two adjacent skeleton yokes (3). The arc-shaped plate (61) has first side plates (62) extending radially along the skeleton cylinder (1) on both sides. The ends of each first side plate (62) are connected to second side plates (63). The two first side plates (62) are connected to the opposite sides of the two adjacent skeleton yokes (3), and the connecting ends of the two second side plates (63) are connected to the symmetrically arranged sides of the two adjacent skeleton tooth tips (2).

4. The insulating frame according to claim 3, characterized in that, Each of the second side plates (63) has a baffle (4) on its free end, the baffle (4) being used to prevent the enameled wire from contacting the iron core (200).

5. The insulating frame according to claim 1, characterized in that, The connection position between the skeleton yoke (3) and the second side is provided with a first rounded transition part (5), and the radius of curvature of the first rounded transition part (5) is 1mm-2.5mm.

6. The insulating frame according to claim 5, characterized in that, The radius of curvature of the first rounded transition portion (5) is 2 mm.

7. A stator assembly, characterized in that, include: Iron core (200), on which a lip (201) is provided; The insulating frame (100) as described in any one of claims 1-6, wherein the plug-in portion (6) is plugged into the lip (201); The winding is formed by winding enameled wire around the skeleton yoke (3) and the iron core (200).

8. The stator assembly according to claim 7, characterized in that, When the connection position of the skeleton yoke (3) and the second side is connected by the first rounded corner transition part (5); The iron core (200) includes iron core teeth (202), iron core yoke (203) and iron core body (204). The iron core body (204) is annular. Along the circumference of the iron core body (204), a plurality of iron core yokes (203) are spaced apart on the inner wall of the iron core body (204). Each iron core yoke (203) is connected to the iron core teeth (202). A second rounded corner transition (207) is provided at the connection position between the iron core teeth (202) and the iron core yoke (203). The radius of curvature of the first rounded corner transition (5) is greater than the radius of curvature of the second rounded corner transition (207).

9. An electric motor, characterized in that, Includes the stator assembly as described in any one of claims 7-8.

10. A water pump, characterized in that, include: Impeller assembly; The motor of claim 9 drives the impeller assembly to rotate.

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