Insulating shell, stator unit, stator and electric pump

Abstract

The invention provides an insulating shell which comprises a wire hanging part and a winding part, the wire hanging part is provided with a wire passing groove, the wall forming the wire passing groove comprises a first guide surface and a second guide surface, the second guide surface is located at the bottom of the wire passing groove, and the first guide surface is located on the side, relatively close to the winding part, of the second guide surface; the winding part is provided with a third guide surface, the third guide surface is located on the side, relatively close to the wire hanging part, of the winding part, the third guide surface and the first guide surface are in smooth transition, the end, close to the wire passing groove, of the third guide surface is defined as a first end, the end, away from the wire passing groove, of the third guide surface is defined as a second end, and the direction from the first end to the second end is a first direction; the first end, the end, close to the winding part, of the wire passing groove and the second end are sequentially arranged in the first direction, the first guide face, the second guide face and the third guide face are arranged, the wire can be tightly attached to the winding part and the wire blocking plate, the gap between the wire and the insulating shell is reduced, and therefore the groove fullness rate of winding is increased.

Description

Technical Field

[0001] This application relates to the technical field of fluid control, and particularly to an insulating housing, a stator unit, a stator, and an electric pump. Background Art

[0002] The electric pump in the related art includes an insulating skeleton, a stator core, and an enameled wire. The insulating skeleton is coated on the stator core and fixedly connected to the stator core, and the enameled wire is wound around the insulating skeleton. When assembling the stator of this type of electric pump, there is a gap between the enameled wire and the insulating skeleton, reducing the slot fill factor of the enameled wire winding. Summary of the Invention

[0003] The embodiments of this application provide an insulating housing, a stator unit, a stator, and an electric pump to improve the slot fill factor of the winding.

[0004] An insulating housing includes a wire-hanging portion and a winding portion. The wire-hanging portion is provided with a wire-passing groove. The wall forming the wire-passing groove includes a first guiding surface and a second guiding surface. The second guiding surface is located at the bottom of the wire-passing groove, and the first guiding surface is located on the side of the second guiding surface relatively closer to the winding portion. The winding portion is provided with a third guiding surface. The third guiding surface is located on the side of the winding portion relatively closer to the wire-hanging portion, and the third guiding surface is in smooth transition with the first guiding surface. Define the end of the third guiding surface close to the wire-passing groove as the first end, and the end of the third guiding surface far from the wire-passing groove as the second end. The direction from the first end to the second end is the first direction. The first end, the end of the wire-passing groove close to the winding portion, and the second end are arranged in sequence along the first direction.

[0005] The insulating housing provided by the embodiments of this application can limit the enameled wire by setting the first guiding surface, the second guiding surface, the third guiding surface, and the wire-passing groove, enabling the enameled wire to be closely attached to the winding portion, thereby reducing the gap in the winding portion and improving the slot fill factor.

[0006] A stator unit includes an insulating housing, an iron core, and an enameled wire. The insulating housing is fixedly connected to the iron core. The insulating housing includes a wire hanging portion and a winding portion. The wire hanging portion is provided with a wire passing groove. The wall forming the wire passing groove includes a first guiding surface and a second guiding surface. The second guiding surface is located at the bottom of the wire passing groove, and the first guiding surface is located on the side of the second guiding surface relatively closer to the winding portion. The winding portion is provided with a third guiding surface. The third guiding surface is located on the side of the winding portion relatively closer to the wire hanging portion, and the third guiding surface is smoothly transitioned with the first guiding surface. Define one end of the third guiding surface close to the wire passing groove as the first end, and the end of the third guiding surface far from the wire passing groove as the second end. The direction from the first end to the second end is the first direction. The first end, the end of the wire passing groove close to the winding portion, and the second end are arranged in sequence along the first direction. The enameled wire includes an inlet segment. At least part of the inlet segment is located in the wire passing groove. The inlet segment is in interference fit with the wire hanging portion forming the side wall of the wire passing groove. The inlet segment is in contact with the first guiding surface and the second guiding surface. Part of the inlet segment is wound around the winding portion, and part of the inlet segment is in contact with the third guiding surface.

[0007] The stator unit provided by the embodiment of the present application can limit the enameled wire by setting the first guiding surface, the second guiding surface, the third guiding surface, and the wire passing groove, so that the inlet layer of the enameled wire can be closely attached to the winding portion, thereby reducing the gap of the winding portion and improving the slot fill factor.

[0008] A stator includes a plurality of stator units. Each stator unit includes an insulating housing, an iron core, and an enameled wire. The enameled wires of the plurality of stator units are electrically connected. The insulating housing includes a wire hanging portion and a winding portion. The wire hanging portion is provided with a wire passing groove. The wall forming the wire passing groove includes a first guiding surface and a second guiding surface. The second guiding surface is located at the bottom of the wire passing groove, and the first guiding surface is located on the side of the second guiding surface relatively closer to the winding portion. The winding portion is provided with a third guiding surface. The third guiding surface is located on the side of the winding portion relatively closer to the wire hanging portion, and the third guiding surface is smoothly transitioned with the first guiding surface. Define one end of the third guiding surface close to the wire passing groove as the first end, and the end of the third guiding surface far from the wire passing groove as the second end. The direction from the first end to the second end is the first direction. The first end, the end of the wire passing groove close to the winding portion, and the second end are arranged in sequence along the first direction. The enameled wire includes an inlet segment. At least part of the inlet segment is located in the wire passing groove. The inlet segment is in interference fit with the wire hanging portion forming the side wall of the wire passing groove. The inlet segment is in contact with the first guiding surface and the second guiding surface. Part of the inlet segment is wound around the winding portion, and part of the inlet segment is in contact with the third guiding surface.

[0009] The stator provided by the embodiment of the present application can limit the enameled wire by setting the first guiding surface, the second guiding surface, the third guiding surface, and the wire passing groove, so that the inlet layer of the enameled wire can be closely attached to the winding portion, thereby reducing the gap of the winding portion and improving the slot fill factor.

[0010] An electric pump includes a stator, a pump cover, and a rotor. The pump cover is rotatably connected to the rotor and fixedly connected to the stator. It includes a number of stator units. Each stator unit includes an insulating housing, an iron core, and an enameled wire. The enameled wires of the number of stator units are electrically connected. The insulating housing includes a wire-hanging portion and a wire-winding portion. The wire-hanging portion is provided with a wire-passing groove. The wall forming the wire-passing groove includes a first guiding surface and a second guiding surface. The second guiding surface is located at the bottom of the wire-passing groove, and the first guiding surface is located on the side of the second guiding surface relatively closer to the wire-winding portion. The wire-winding portion is provided with a third guiding surface. The third guiding surface is located on the side of the wire-winding portion relatively closer to the wire-hanging portion, and the third guiding surface smoothly transitions with the first guiding surface. Define the end of the third guiding surface close to the wire-passing groove as the first end, and the end of the third guiding surface far from the wire-passing groove as the second end. The direction from the first end to the second end is the first direction. The first end, the end of the wire-passing groove close to the wire-winding portion, and the second end are arranged in sequence along the first direction. The enameled wire includes an inlet segment. At least part of the inlet segment is located in the wire-passing groove. The inlet segment is in interference fit with the wire-hanging portion forming the side wall of the wire-passing groove. The inlet segment abuts against the first guiding surface and the second guiding surface. Part of the inlet segment is wound around the wire-winding portion, and part of the inlet segment abuts against the third guiding surface.

[0011] An electric pump provided by an embodiment of the present application can limit the enameled wire by setting the first guiding surface, the second guiding surface, the third guiding surface, and the wire-passing groove, so that the inlet layer of the enameled wire can be closely attached to the wire-winding portion, thereby reducing the gap of the wire-winding portion and increasing the slot fill factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application and used together with the specification to explain the principles of the present application.

[0013] Figure 1 It is a schematic structural diagram of the insulating housing in one embodiment;

[0014] Figure 2 It is a partial enlarged schematic diagram of part A;

[0015] Figure 3 It is a schematic structural diagram of the insulating housing aiming to show the wire-hanging plate;

[0016] Figure 4 It is a schematic structural diagram of the insulating housing in another embodiment;

[0017] Figure 5 It is a schematic structural diagram of the stator unit in one embodiment;

[0018] Figure 6 It is a schematic structural diagram of the stator unit in another embodiment;

[0019] Figure 7 It is a partial schematic diagram aiming to show the enameled wire;

[0020] Figure 8 is a schematic structural diagram of a stator in an embodiment;

[0021] Figure 9 is a schematic diagram designed to show the winding sequence of the stator;

[0022] Figure 10 is a schematic structural diagram of an electric pump in an embodiment.

[0023] 1. Insulating housing; 11. Wire hanging part; 111. Wire blocking plate; 1111. First blocking part; 1112. Second blocking part; 1113. Wire passing groove; 11131. First guiding surface; 11132. Second guiding surface; 112. Wire hanging plate; 1121. Wire hanging groove; 113. Plug-in part; 1131. Positioning column; 1132; Plug-in slot; 1133. Wire clamping groove; 1134. Wire clamping guiding surface; 12. Winding part; 121. Accommodating cavity; 122. Winding guiding part; 123. Wedge-shaped block; 1231. Limiting surface; 1232. Guiding surface; 1233. Supporting surface; 124. Third guiding surface; 125. Winding groove; 13. Inner supporting part; 2. Iron core; 3. Enameled wire; 31. Inlet wire segment; 32. First wire wrapping layer; 33. Second wire wrapping layer; 4. Stator unit; 5. Winding; 51. First winding; 52. Second winding; 53. Third winding; 6. Stator; 7. Pump cover; 8. Rotor.

[0024] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0025] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0026] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. The following several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in combination with the attached Figures 1-10 , and the embodiments of the present application will be described.

[0027] This embodiment of the present application first discloses an insulating housing 1, as Figure 1 shown, including a wire hanging part 11, a wire winding part 12 and an inner support part 13. The wire winding part 12 is provided with a receiving cavity 121 for receiving silicon steel sheets or a stator 2. The wire winding part 12 includes a first end and a second end. The first end of the wire winding part 12 is fixedly connected to the wire hanging part 11, and the second end of the wire winding part 12 is fixedly connected to the inner support part 13. Both the wire hanging part 11 and the inner support part 13 are provided with through holes communicating with the receiving cavity 121.

[0028] The wire hanging part 11 includes a wire blocking plate 111. The wire blocking plate 111 is located at one end in the length direction of the wire hanging part 11. The wire blocking plate 111 is provided with a wire passing groove 1113. The wire passing groove 1113 penetrates through the wire blocking plate 111 along the thickness direction of the wire blocking plate 111, and divides the wire blocking plate 111 into a first blocking part 1111 and a second blocking part 1112. The first blocking part 1111 and the second blocking part 1112 are respectively located on both sides of the wire passing groove 1113. The wall forming the wire hanging groove 1113 includes a first guiding surface 11131 and a second guiding surface 11132. The second guiding surface 11132 is located at the bottom of the wire passing groove 1113. The first guiding surface 11131 is located on the side relatively closer to the wire winding part 12 than the second guiding surface 11132. The wire winding part 12 is provided with a third guiding surface 124. The third guiding surface 124 is located at the end of the wire winding part 12 close to the wire hanging part 11, and the third guiding surface 124 is in smooth transition with the first guiding surface 11131. Define the end of the third guiding surface 124 close to the wire passing groove 1113 as the first end, and the end of the third guiding surface 124 far from the wire passing groove 1113 as the second end. The direction from the first end to the second end is the first direction. The first end, the end of the wire passing groove 1113 close to the wire winding part 12 and the second end are arranged in sequence along the first direction. The second guiding surface 11132 is inclined in a direction away from the third guiding surface 124 along a direction opposite to the first direction.

[0029] The wire winding part 12 is provided with a wire winding guiding member 122. The wire winding guiding member 122 is spirally or approximately spirally wound around the outside of the wire winding part 12, and the wire winding guiding member 122 and the wire winding part 12 are an integral part. A wire winding groove 125 is provided between two adjacent wire winding guiding members 122 located on the same side surface of the wire winding part 12.

[0030] The wire winding part 12 is provided with a wedge block 123. The wedge block 123 is provided with a limiting surface 1231, a guiding surface 1232 and a supporting surface 1233. The limiting surface 1231 is flush with the third guiding surface 124. The wire winding guiding member 122 located on the same side wall of the wire winding part 12 as the wedge block 123 is arranged parallel to the guiding surface 1232. The supporting surface 1233 is located on the side of the wedge block 123 far from the wire winding part 12.

[0031] When winding the wire around the winding part 12, the wire passes through the wire groove 1113, passes through the wire blocking plate 111, and abuts against the wire blocking plate 111. The side of the wire close to the second guiding surface 11132 fits with the second guiding surface 11132. The side of the wire close to the first guiding surface 11131 fits with the first guiding surface 11131 and the third guiding surface 11133, and enters the space surrounded by the third guiding surface, the hanging wire part 11 and the winding guiding part 122 along the side wall of the hanging wire part 11 close to the winding part 12. Thus, the wire can closely fit with the first guiding surface 11131, the second guiding surface 11132, the third guiding surface 124 and the winding guiding part 122, reducing the gap between the wire and the winding part 12 and the hanging wire part 11 during winding and improving the space utilization rate.

[0032] The hanging wire part 11 further includes a hanging wire plate 112. The hanging wire plate 112 is arranged at one end of the hanging wire part 11 away from the wire blocking plate 111. The hanging wire plate 112 and the hanging wire part 11 are an integral part. The hanging wire plate 112 is provided with a hanging wire groove 1121, and the hanging wire groove 1121 is arranged on the side of the hanging wire plate 112 close to the wire passing groove 1113.

[0033] In another embodiment, as Figure 3 shown, the hanging wire part 11 further includes a plug-in part 113. The plug-in part 113 is located at one end of the hanging wire part 11 away from the wire blocking plate 111. The plug-in part 113 and the hanging wire part 11 are an integral part. The plug-in part 113 includes a positioning column 1131, a plug-in slot 1132 and a wire clamping groove 1133. The positioning column 1131 is located at one end of the plug-in part 113 in the length direction; the plug-in slot 1132 is opened on the plug-in part 113 and is located at the end of the plug-in part 113 away from the positioning column 1131. The wire clamping groove 1133 is opened on the plug-in part 113 forming the plug-in slot 1132, and the wire clamping groove 1133 communicates with the plug-in slot 1132; in this embodiment, the wire passing groove 1113 is opened on the plug-in part 113. The first guiding surface 11131 is located on the side of the wire passing groove 1113 close to the positioning column 1131. The third guiding surface 124 is located on the side of the winding part close to the wire passing groove 1113. The third guiding surface 124 is flush with the first guiding surface 11131. In this embodiment, the wedge-shaped block is located on the side wall of the winding part 12 close to the plug-in part 113.

[0034] The insulating housing 1 can be used to assist the plugging and electrical connection of the wound wire to the external circuit. Specifically, the plug-in member 113 provided on the wire hanging portion 11 is in plug-in cooperation with the external plug through the plug-in slot 1132. The width of the wire clamping groove 1133 is set to be less than or equal to the wire diameter of the wound wire. Thus, when the wire is pressed into the wire clamping groove 1133, the plug-in member 113 on the side wall of the wire clamping groove 1133 can fix the wire. The setting of the wire clamping guiding surface 1134 helps to reduce the degree of wire bending, so that the wire can be close to the side surface of the wire hanging portion 11 near the wire winding portion 12 and enter the wire winding groove 125 at the first end of the wire winding portion 12, thereby reducing the space occupied by the first turn of the coil formed by the wire on the wire winding portion 12, and further improving the space utilization rate of the wire winding on the wire winding portion 12. The setting of the wedge block 123 also helps the wire to continue winding along the approximately spiral wire winding groove 125 after the first turn of the coil is wound.

[0035] The embodiment of the present application also discloses a stator unit 4, as Figure 4 shown, including an insulating housing 1, an iron core 2, and an enameled wire 3. Part of the iron core 2 is located in the accommodation cavity 121 of the insulating housing 1. Specifically, the insulating housing 1 is injection-molded with the iron core 2 as an insert. Part of the enameled wire 3 is wound around the wire winding portion 12, and part of the enameled wire 3 on the side close to the wire winding portion 12 is located in the wire winding groove 125.

[0036] The enameled wire 3 includes an incoming wire segment 31, a first wire wrapping layer 32, and a second wire wrapping layer 33. At least part of the incoming wire segment 31 is located in the wire passing groove 1113. The first wire wrapping layer 32 is wound around the wire winding portion 12 and abuts against the wire winding guiding member 122. The second wire wrapping layer 33 is located on the side of the first wire wrapping layer 32 away from the wire winding portion 12 and abuts against the first wire wrapping layer 32.

[0037] When winding the enameled wire 3 on the insulating housing 1, first pass the incoming wire segment 31 through the wire passing groove 1113 from the side of the wire hanging portion 11 away from the wire winding portion 12 through the wire blocking plate 111, and make the enameled wire 3 enter the wire winding groove 125 on the side of the wire winding portion 12 close to the wire passing groove 1113. Then, wind the first wire wrapping layer 31 along the approximately spiral wire winding groove 125 in the direction close to the inner support portion 13. When the first wire wrapping layer 31 is wound to the inner support portion 13, start winding the second wire wrapping layer 33 on the side of the enameled wire 3 that is partially located in the wire winding groove 125 and away from the wire winding groove 125. The winding direction of the second wire wrapping layer 33 is the same as that of the first wire wrapping layer 32, but the winding traveling direction is changed to the direction approaching from the inner support portion 13 to the wire hanging portion 11. The subsequent enameled wire 3 is wound in such an alternating manner of changing the winding traveling direction to reach the required number of turns of the coil. After that, pass the enameled wire 3 through the wire passing groove 1113 and through the wire blocking plate 111 again, or pass the enameled wire 3 through the wire hanging groove 1121 and through the wire hanging plate 112.

[0038] In another embodiment, as Figure 5 shown, a part of the enameled wire 3 is located in the wire clamping groove 1133. When winding the enameled wire 3, first pass the enameled wire 3 through the wire clamping groove 1133 and through the connector 113, and then make the enameled wire 3 in the wire clamping groove 1133 close to the wire clamping guiding surface 1134 and extend into the winding groove 125 near the wire hanging part 11. Then wind the enameled wire 3 along the approximately spiral winding groove 125 in the direction close to the inner support part 13. When the enameled wire 3 is wound to the inner support part 13, start the second layer of winding on the side of the part of the enameled wire 3 located in the winding groove 125 away from the winding groove 125. The winding direction of the second layer of winding is the same as that of the first layer of winding, but the winding advancing direction is changed to the direction close to the wire hanging part 11 from the inner support part 13. The subsequent enameled wire 3 is wound in such an alternating manner of changing the winding advancing direction to reach the required number of turns of the coil. After that, pass the enameled wire 3 through the wire groove 1113 and through the wire blocking plate 111 again.

[0039] The embodiment of the present application also discloses a stator 6, as Figure 6 and 7 shown, including a multi-phase winding 5. Each phase winding 5 includes several stator units 4. In this embodiment, the stator unit 4 includes a three-phase winding 5. The three-phase windings 5 are respectively a first winding 515, a second winding 525, and a third winding 535. The first winding 515 includes stator units 4a, 4d, and 4g; the second winding 525 includes stator units 4b, 4e, and 4h; the third winding 535 includes stator units 4c, 4f, and 4i; the nine stator units 4 are arranged in a surrounding manner and fixedly connected in the order of stator unit 4a, stator unit 4b, stator unit 4c, stator unit 4d, stator unit 4e, stator unit 4f, stator unit 4g, stator unit 4h, stator unit 4i, and stator unit 4a. Among them, the stator units 4a, 4b, and 4c are the stator units 4 as Figure 6 shown, and the stator units 4d, 4e, 4f, 4g, 4h, and 4i are the stator units 4 as Figure 5 shown.

[0040] When assembling the stator 6, the assembly is carried out by the method of winding first and then welding. Specifically, first arrange the nine stator units 4 of the three-phase winding 5 horizontally in the order of stator unit 4a, stator unit 4b, stator unit 4c, stator unit 4d, stator unit 4e, stator unit 4f, stator unit 4g, stator unit 4h, and stator unit 4i. Then wind the enameled wire 3 on the stator unit 4 to complete the winding step. The specific winding method is as Figure 8As shown, the winding of the first winding 515 is carried out in the order of the stator unit 4a, the stator unit 4d, and the stator unit 4g. When winding the first winding 515, first fixedly connect the enameled wire 3 with the connector 113 of the stator unit 4a, and make the enameled wire 3 enter the winding slot 125 of the stator unit 4a along the wire clamping guide surface 1134 to start winding. When the number of winding turns reaches the predetermined number of turns, pass the enameled wire 3 through the wire slot 1113 near the winding part 12 on one side and pass through the wire blocking plate 111, and bend it in the direction relatively close to the second blocking part 1112 so that the enameled wire 3 extends to the first blocking part 1111 of the stator unit 4d. The enameled wire 3 extending to the first blocking part 1111 of the stator unit 4d passes through the wire slot 1113 and passes through the wire blocking plate 111 and starts winding. After the winding is wound to the predetermined number of turns, pass the enameled wire 3 through the wire slot 1113 and out of the wire blocking plate 111 of the stator unit 4d, and then bend the enameled wire 3 in the direction of the second blocking part 1112 so that the enameled wire 3 extends to the first blocking part of the stator unit 4g. The enameled wire 3 extending to the first blocking part 1111 of the stator unit 4g passes through the wire slot 1113 and passes through the wire blocking plate 111 and starts winding. After the winding is wound to the predetermined number of turns, pass the enameled wire 3 through the wire hanging slot 1121 and out of the wire hanging plate 112 of the stator unit 4g, thereby completing the winding process of the first winding 515. After that, extend the enameled wire 3 along the side of the wire hanging plate 112 away from the inner support part 13 to the insertion part of the stator unit 4b, and then complete the winding of the second winding 525 and the third winding 535 in the same way. During the above winding process, the setting of the third blocking part can limit the enameled wire 3 in the wire slot 1113, thereby reducing the probability of the enameled wire 3 entering the gap between two adjacent stator units 4; after completing the winding, the 9 completed winding stator units 4 need to be bent into a ring shape, so that the side of the stator unit 4i away from the stator unit 4h is in contact with the side of the stator unit 4a away from the stator unit 4b, and then weld and fix each stator unit 4 with its two adjacent stator units 4, thereby completing the assembly of the stator 6.

[0041] During the actual winding process, the enameled wire 3 is clamped by the wire pay-off device. When passing through the wire baffle 111, the wire pay-off device needs to be moved to a height higher than that of the wire baffle 111 and then lowered, so that the wire pay-off device can drive the enameled wire 3 over the wire baffle 111 and make the enameled wire 3 fall into the wire groove 1113. Therefore, in this embodiment, the height relationship between the height H1 of the first baffle portion 1111 and the height H2 of the second baffle portion 1112 is set as H1 > H2, that is, the first baffle portion 1111 is higher than the second baffle portion 1112. Thus, when the winding of the previous stator unit 4 is completed and the winding of the next stator unit 4 starts, the wire pay-off device only needs to drive the enameled wire 3 to rise to a position higher than the second baffle portion 1112 and lower than the first baffle portion 1111, and then the subsequent action of driving the enameled wire 3 over the wire baffle 111 can be completed. During this process, since the first baffle portion 1111 is higher than the second baffle portion 1112, during the lifting process of the wire pay-off device, the first baffle portion 1111 can block the enameled wire 3 and prevent the enameled wire 3 between the previous stator unit 4 and this stator unit 4 from passing over the wire baffle 111 and entering the winding part 12, avoiding defects during the winding of the stator 6, and thus improving the yield rate.

[0042] An embodiment of the present application also discloses an electric pump, as Figure 9 shown. The electric pump includes a pump cover 7, a rotor 8, and a stator 6. The pump cover 7 is hermetically fixed to the stator 6 to prevent the leakage of the working medium. The rotor 8 is arranged inside the inner circle of the stator 6, and the rotor 8 is rotatably connected to the pump cover 7.

[0043] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An insulating housing (1), characterized in that, It includes a wire-hanging part (11) and a wire-winding part (12). The wire-hanging part (11) is provided with a wire-passing groove (1113). The wall forming the wire-passing groove (1113) includes a first guiding surface (11131) and a second guiding surface (11132). The second guiding surface (11132) is located at the bottom of the wire-passing groove (1113), and the first guiding surface (11131) is located on the side of the second guiding surface (11132) relatively closer to the wire-winding part (11). The wire-winding part (12) is provided with a third guiding surface (124). The third guiding surface (124) is located on the side of the wire-winding part (12) relatively closer to the wire-hanging part (11), and the third guiding surface (124) is in smooth transition with the first guiding surface (11131). Define one end of the third guiding surface (124) close to the wire-passing groove (1113) as the first end, and the other end of the third guiding surface (124) far from the wire-passing groove (1113) as the second end. The direction from the first end to the second end is the first direction. The first end, the end of the wire-passing groove (1113) close to the wire-winding part (12), and the second end are arranged in sequence along the first direction.

2. The insulating housing (1) according to claim 1, characterized in that, The second guiding surface (11132) is inclined in a direction away from the third guiding surface (124) along a direction opposite to the first direction.

3. The insulating housing (1) according to claim 2, characterized in that, The wire-winding part (12) is provided with a wire-winding guiding member (122). The wire-winding guiding member (122) is spirally or approximately spirally wound around the outside of the wire-winding part (12). A wire-winding groove (125) is provided between two adjacent wire-winding guiding members (122) on the same side of the wire-winding part (12).

4. The insulating housing (1) according to claim 3, characterized in that, The wire-winding part (12) is provided with a wedge block (123). The wedge block (123) is provided with a limiting surface (1231) and a guiding surface (1232). The limiting surface (1231) is flush with the third guiding surface (124). The wire-winding guiding member (122) on the same side wall of the wire-winding part (12) as the wedge block (123) is arranged parallel to the guiding surface (1232).

5. The insulating housing (1) according to any one of claims 1-4, characterized in that, The wire-hanging part (11) includes a wire-blocking plate (111), and at least part of the wire-passing groove (1113) is located in the wire-blocking plate (111). Or the wire-hanging part (11) includes a plug-in part (113), and at least part of the wire-passing groove (1113) is located in the plug-in part (113).

6. A stator unit (4), characterized in that, It includes an insulating housing (1), an iron core (2), and an enameled wire (3). The insulating housing (1) is fixedly connected to the iron core (2). The insulating housing (1) includes a wire hanging part (11) and a winding part (12). The wire hanging part (11) is provided with a wire passing groove (1113). The wall forming the wire passing groove (1113) includes a first guiding surface (11131) and a second guiding surface (11132). The second guiding surface (11132) is located at the bottom of the wire passing groove (1113), and the first guiding surface (11131) is located on the side of the second guiding surface (11132) relatively closer to the winding part (11). The winding part (12) is provided with a third guiding surface (124). The third guiding surface (124) is located on the side of the winding part (12) relatively closer to the wire hanging part (11), and the third guiding surface (124) is in smooth transition with the first guiding surface (11131). Define one end of the third guiding surface (124) close to the wire passing groove (1113) as the first end, and the other end of the third guiding surface (124) far from the wire passing groove (1113) as the second end. The direction from the first end to the second end is the first direction. The first end, the end of the wire passing groove (1113) close to the winding part (12), and the second end are arranged in sequence along the first direction. The enameled wire (3) includes an inlet wire segment (31). At least part of the inlet wire segment (31) is located in the wire passing groove (1113). The inlet wire segment (31) is in interference fit with the wire hanging part (11) forming the side wall of the wire passing groove (1113). The inlet wire segment (31) abuts against the first guiding surface (11131) and the second guiding surface (11132). Part of the inlet wire segment (31) is wound around the winding part (12), and part of the inlet wire segment (31) abuts against the third guiding surface (124).

7. The stator unit (4) according to claim 6, characterized in that, The winding part (12) is provided with a winding guiding member (122). The winding guiding member (122) is spirally or approximately spirally arranged around the outside of the winding part (12). A winding groove (125) is arranged between two adjacent winding guiding members (122) on the same side of the winding part (12). The enameled wire includes a first wire wrapping layer (32). At least part of the first wire wrapping layer (32) is located in the winding groove (125) and abuts against the winding guiding member (122) forming the inner wall of the winding groove (125).

8. The stator unit (4) according to claim 7, characterized in that, The winding part (12) is provided with a wedge block (123). The wedge block (123) is provided with a limiting surface (1231) and a guiding surface (1232). The limiting surface (1231) is flush with the third guiding surface (124). Part of the enameled wire (3) abuts against the limiting surface (1231). The first wire wrapping layer (32) close to the wedge block (123) abuts against the guiding surface.

9. The stator unit (4) according to claim 8, characterized in that, The wedge-shaped block (123) further includes a support surface (1233), the support surface (1233) is located on a side of the wedge-shaped block (123) away from the winding portion (12), the enameled wire (3) includes a second wire coating layer (33), the second wire coating layer (33) is located on a side of the first wire coating layer (32) away from the winding portion (12), a side of the second wire coating layer (33) close to the wire hanging portion (11) abuts against the support surface (1233), and a part of the second wire coating layer (33) is located on a side of the incoming wire segment (31) away from the third guiding surface (124) and abuts against the incoming wire segment (31).

10. A stator (6), characterized in that, It includes a plurality of stator units (4), the stator units (4) include an insulating housing (1), an iron core (2) and an enameled wire (3), the insulating housing (1) is fixedly connected to the iron core (2), the enameled wires (3) of the plurality of stator units (6) are electrically connected, the insulating housing (1) includes a wire hanging portion (11) and a winding portion (12), the wire hanging portion (11) is provided with a wire passing groove (1113), the wall forming the wire passing groove (1113) includes a first guiding surface (11131) and a second guiding surface (11132), the second guiding surface (11132) is located at the bottom of the wire passing groove (1113), and the first guiding surface (11131) is located on a side of the second guiding surface (11132) relatively close to the winding portion (11); the winding portion (12) is provided with a third guiding surface (124), the third guiding surface (124) is located on a side of the winding portion (12) relatively close to the wire hanging portion (11), and the third guiding surface (124) is in smooth transition with the first guiding surface (11131). Define one end of the third guiding surface (124) close to the wire passing groove (1113) as the first end, and one end of the third guiding surface (124) away from the wire passing groove (1113) as the second end, and the direction from the first end to the second end is the first direction. The first end, one end of the wire passing groove (1113) close to the winding portion (12) and the second end are arranged in sequence along the first direction; the enameled wire (3) includes an incoming wire segment (31), at least a part of the incoming wire segment (31) is located in the wire passing groove (1113), the incoming wire segment (31) is in interference fit with the wire hanging portion (11) forming the side wall of the wire passing groove (1113), the incoming wire segment (31) abuts against the first guiding surface (11131) and the second guiding surface (11132), a part of the incoming wire segment (31) is wound around the winding portion (12), and a part of the incoming wire segment (31) abuts against the third guiding surface (124).

11. An electric pump, characterized in that, It includes a stator (6), a pump cover (7) and a rotor (8). The pump cover (7) is rotatably connected to the rotor (8), and the pump cover (7) is fixedly connected to the stator (6). The stator includes a plurality of stator units (4). Each stator unit (4) includes an insulating housing (1), an iron core (2) and an enameled wire (3). The insulating housing (1) is fixedly connected to the iron core (2). The enameled wires (3) of a plurality of the stator units (6) are electrically connected. The insulating housing (1) includes a wire hanging part (11) and a wire winding part (12). The wire hanging part (11) is provided with a wire passing groove (1113). The wall forming the wire passing groove (1113) includes a first guiding surface (11131) and a second guiding surface (11132). The second guiding surface (11132) is located at the bottom of the wire passing groove (1113), and the first guiding surface (11131) is located on the side of the second guiding surface (11132) relatively closer to the wire winding part (11). The wire winding part (12) is provided with a third guiding surface (124). The third guiding surface (124) is located on the side of the wire winding part (12) relatively closer to the wire hanging part (11), and the third guiding surface (124) is in smooth transition with the first guiding surface (11131). Define the end of the third guiding surface (124) close to the wire passing groove (1113) as the first end, and the end of the third guiding surface (124) far from the wire passing groove (1113) as the second end. The direction from the first end to the second end is the first direction. The first end, the end of the wire passing groove (1113) close to the wire winding part (12) and the second end are arranged in sequence along the first direction. The enameled wire (3) includes an inlet wire segment (31). At least part of the inlet wire segment (31) is located in the wire passing groove (1113). The inlet wire segment (31) is in interference fit with the wire hanging part (11) forming the side wall of the wire passing groove (1113). The inlet wire segment (31) abuts against the first guiding surface (11131) and the second guiding surface (11132). Part of the inlet wire segment (31) is wound around the wire winding part (12), and part of the inlet wire segment (31) abuts against the third guiding surface (124).

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