Electronic water pump, thermal management system and vehicle

Abstract

The utility model discloses an electronic water pump, a thermal management system and a vehicle, a stator assembly comprises a stator assembly, the stator assembly comprises a stator iron core and an insulation support, the insulation support comprises a support body and a positioning column, the support body wraps the stator iron core, the positioning column is arranged on the support body, and the positioning column is provided with a support positioning hole extending along the axial direction; the machine shell is an injection molding body and wraps the stator assembly in an injection molding mode, the machine shell comprises a first sealing part and a second sealing part which are connected, the first sealing part extends in the circumferential direction of the positioning column and is in sealing connection with at least part of the outer circumferential face of the positioning column, and the second sealing part is located outside the support positioning hole and is in sealing connection with the edge of an end opening of the support positioning hole. According to the electronic water pump provided by the embodiment of the utility model, the combination surface of the casing and the positioning column forms a zigzag sealing structure, so that the sealing performance at the positioning hole of the bracket is greatly enhanced, a subsequent sealing process is not needed after the casing is formed, the process is simplified, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electronic water pump technology, and more specifically, to an electronic water pump, a thermal management system, and a vehicle. Background Technology

[0002] Electric water pumps are widely used due to their advantages such as high efficiency and precise control. In related technologies, during the injection molding of the electric water pump housing, the stator assembly is placed in the mold, and the mold's positioning fixture contacts the stator assembly to support and position it. After the housing injection molding is completed, the mold positioning fixture is removed, leaving a hole or notch at its location. The seal at this hole or notch is prone to failure, allowing external moisture to easily enter and penetrate the housing through the mating surface, corroding the stator core or stator windings and causing reliability issues. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide an electronic water pump with good sealing performance at the joint surface between the housing and the bracket positioning hole, which helps to eliminate the need for subsequent sealing processes.

[0004] Another objective of this invention is to provide a thermal management system having the aforementioned electronic water pump.

[0005] Another objective of this invention is to provide a vehicle having the aforementioned thermal management system.

[0006] An electronic water pump according to an embodiment of the present invention includes: a stator assembly, the stator assembly including a stator core and an insulating support, the insulating support including a support body and a positioning post, the support body enclosing the stator core, the positioning post being disposed on the support body, the positioning post having a support positioning hole extending axially; and a housing, the housing being an injection molded body and injection molded to enclose the stator assembly, the housing including a first sealing part and a second sealing part connected together, the first sealing part extending circumferentially along the positioning post and sealingly connected to at least a portion of the outer peripheral surface of the positioning post, the second sealing part being located outside the support positioning hole and sealingly connected to the end opening edge of the support positioning hole.

[0007] According to the embodiment of the present invention, the electronic water pump is equipped with a positioning column by means of an insulating bracket. The first sealing part and the second sealing part of the housing are respectively sealed and connected to at least part of the outer peripheral surface of the positioning column and the opening edge of the positioning hole of the bracket, forming a tortuous sealing structure. This greatly enhances the sealing performance at the positioning hole of the bracket. Moreover, no subsequent sealing process is required after the housing is formed, which helps to simplify the process, reduce costs, and improve the sealing effect of the electronic water pump.

[0008] In addition, the electronic water pump according to the above embodiments of this utility model may also have the following additional technical features:

[0009] According to some embodiments of the present invention, the housing further includes a third sealing part connected to the second sealing part, the third sealing part extending along the inner circumferential surface of the bracket positioning hole and sealingly connected to at least a portion of the inner circumferential surface of the bracket positioning hole.

[0010] According to some embodiments of the present invention, the bracket positioning hole includes a first hole segment and a second hole segment. The second hole segment is located on the side of the first hole segment near the end opening of the bracket positioning hole, and the cross-sectional area of ​​the second hole segment perpendicular to the depth direction of the bracket positioning hole is greater than the cross-sectional area of ​​the first hole segment perpendicular to the depth direction of the bracket positioning hole. The third sealing part is located in the second hole segment and is connected to the inner circumferential surface of the second hole segment.

[0011] According to some embodiments of the present invention, the inner circumferential surface of the first hole segment and the inner circumferential surface of the second hole segment are connected by an annular connecting surface, wherein the connecting surface extends perpendicular to the depth direction of the bracket positioning hole, or the connecting surface is a conical surface, and the diameter of the conical surface increases along the direction closer to the second hole segment.

[0012] According to some embodiments of the present invention, the inner circumferential surface of the second hole segment is provided with a sealing groove, and part of the third sealing part is embedded in the sealing groove.

[0013] According to some embodiments of the present invention, the groove is an annular groove or a threaded groove extending circumferentially along the second hole segment.

[0014] According to some embodiments of the present invention, the bracket positioning holes are multiple and spaced apart along the circumference of the insulating bracket.

[0015] According to some embodiments of the present invention, the support body includes an iron core insulation part, a first baffle insulation part, and a second baffle insulation part. The iron core insulation part encloses the stator iron core. The first baffle insulation part and the second baffle insulation part are disposed at the axial ends of the iron core insulation part. The first baffle insulation part corresponding to the same stator tooth of the stator iron core is located radially inner to the second baffle insulation part. The positioning post is at least partially located radially outer to the second baffle insulation part. The first sealing part is sealed to the radially outer surface of the second baffle insulation part.

[0016] According to some embodiments of the present invention, in the axial direction of the stator core, the distance between the end face of the second baffle insulation portion away from the core insulation portion and the core insulation portion is H1, and the distance between the end face of the positioning post away from the core insulation portion and the core insulation portion is H2, wherein H1 and H2 are not equal or are equal.

[0017] According to some embodiments of the present invention, the wall surface of the positioning hole of the bracket is spaced apart from the stator core by a predetermined distance.

[0018] The thermal management system according to an embodiment of the present invention includes an electronic water pump according to an embodiment of the present invention.

[0019] The vehicle according to an embodiment of the present invention includes a thermal management system according to an embodiment of the present invention.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the structure of a stator assembly according to some embodiments of the present invention;

[0023] Figure 2 This is a partial cross-sectional view of an electronic water pump according to other embodiments of the present invention;

[0024] Figure 3 This is an axial view of an electronic water pump according to an embodiment of the present invention;

[0025] Figure 4 This is a partial cross-sectional view of an electronic water pump according to a specific embodiment of the present invention;

[0026] Figure 5 This is a partial cross-sectional view of an electronic water pump according to another specific embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of a vehicle according to an embodiment of the present utility model.

[0028] Figure label:

[0029] Vehicles 1000; Thermal management system 300; Electric water pump 200;

[0030] Stator assembly 100; stator core 10;

[0031] Housing 21; First sealing part 211; Second sealing part 212; Third sealing part 213;

[0032] Insulating bracket 30; bracket positioning hole 301; first hole section 302; second hole section 303; wiring gap 304; sealing groove 305; connecting surface 306; bracket body 31; iron core insulation part 311; first baffle insulation part 312; second baffle insulation part 313; positioning post 32; reinforcing part 34; limiting part 35;

[0033] Stator winding 40. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In the description of this utility model, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "first feature above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "first feature above", "above" and "over" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0037] In related technologies, during the injection molding of the electric water pump housing, the stator assembly is placed in the mold, and the mold's positioning fixture contacts the stator assembly to support and position it. After the housing injection molding is completed, the mold positioning fixture is removed, leaving a hole or gap at its location. The seal at this hole or gap is prone to failure, allowing external moisture to easily enter and penetrate the housing through the mating surface, corroding the stator core or stator windings and causing reliability issues. Some related technologies employ sealing methods such as applying adhesive, adding sealing plugs, or adding caps; however, these methods involve numerous materials, complex processes, and high costs.

[0038] Based on this, this application proposes an electronic water pump 200 in which the sealing structure between the positioning post 32 used for positioning during the injection molding process and the housing 21 forms a labyrinth-like sealing structure, which greatly increases the sealing performance at the bracket positioning hole 301 and can eliminate the need for subsequent sealing processes, simplifying the process and reducing costs.

[0039] Hereinafter, with reference to the accompanying drawings, an electronic water pump 200 according to an embodiment of the present invention will be described.

[0040] Reference Figures 1-3 As shown, the electronic water pump 200 according to an embodiment of the present invention includes a stator assembly 100 and a housing 21.

[0041] Specifically, the stator assembly 100 includes a stator core 10 and an insulating support 30. The insulating support 30 includes a support body 31 and a positioning post 32. The support body 31 is injection molded to enclose the stator core 10, and the positioning post 32 is disposed on the support body 31. The positioning post 32 has a support positioning hole 301 extending axially. The housing 21 is an injection molded body and is injection molded to enclose the stator assembly 100. The housing 21 includes a first sealing part 211 and a second sealing part 212 connected together. The first sealing part 211 extends circumferentially along the positioning post 32 and is sealed to at least a portion of the outer peripheral surface of the positioning post 32; the second sealing part 212 is located outside the support positioning hole 301 and is sealed to the end opening edge of the support positioning hole 301.

[0042] The insulating bracket 30 can be an injection-molded body that encapsulates the stator core 10. Alternatively, the insulating bracket 30 can be molded separately and then assembled with the stator core 10. Here, "injection-molded body" means that the insulating bracket 30 can be integrally injection-molded, i.e., the bracket body 31 and the positioning post 32 are obtained through a single injection molding process, simultaneously achieving the injection-molded connection between the insulating bracket 30 and the stator core 10. During the production of the stator assembly 100, the stator core 10 can be placed in a mold for injection molding the insulating bracket 30, then casting is performed, and after cooling, the mold is removed, resulting in the insulating bracket 30 encapsulating the stator core 10. The stator winding 40 of the stator assembly 100 can then be wound around the insulating bracket 30.

[0043] For example, in some specific embodiments, the support body 31 is provided with tooth positioning holes, and a portion of the axial end face of the stator tooth of the stator core 10 is opposite to and exposed through the tooth positioning holes; the axial end face of the tooth shoe of the stator core 10 is at least partially exposed to the insulating support 30. During the injection molding of the insulating support 30, the positioning fixture of the mold can be supported on the axial end face of the stator tooth and the axial end face of the tooth shoe to achieve axial, radial and circumferential positioning of the stator core 10; after injection molding and demolding, the positioning fixture is removed, forming the exposed end face of the tooth and the exposed end face of the tooth shoe.

[0044] By cooperating with the exposed end face of the toothed part and the exposed end face of the toothed shoe, the positioning of the injection molding insulation bracket 30 does not rely on the outer peripheral surface of the stator core 10. As a result, the outer peripheral surface of the stator core 10 does not need to be exposed on the insulation bracket 30, thereby reducing the exposed area of ​​the stator core 10 and improving the sealing effect of the housing 21 after injection molding.

[0045] The positioning post 32 is disposed on the bracket body 31, and the positioning post 32 has a bracket positioning hole 301 extending axially. Here, the positioning post 32 can be disposed on one axial side of the bracket body 31, or on the radially outer side of the bracket body 31, etc., as long as the positioning post 32 is connected to the bracket body 31. Here, the bracket positioning hole 301 can be a through hole or a blind hole.

[0046] The bracket positioning hole 301 extends axially along the stator core 10, allowing the mold positioning fixture to be inserted into the bracket positioning hole 301 during the injection molding process of the housing 21. This fixture engages with the hole wall to achieve axial, radial, and circumferential positioning of the stator assembly 100, ensuring stable positioning of the stator assembly 100. The insulating bracket 30 integrates the functions of supporting and positioning the stator assembly 100 during the injection molding process of the housing 21, eliminating the need for positioning via structures on the stator core 10.

[0047] Furthermore, the housing 21 is an injection-molded body that encapsulates the stator assembly 100. The housing 21 includes a first sealing portion 211 and a second sealing portion 212 connected together. The first sealing portion 211 extends circumferentially along the positioning post 32 and is sealingly connected to at least a portion of the outer peripheral surface of the positioning post 32. The second sealing portion 212 is located outside the bracket positioning hole 301 and is sealingly connected to the end opening edge of the bracket positioning hole 301. The first sealing portion 211 and the second sealing portion 212 can also be used to connect with other parts of the housing 21.

[0048] Therefore, at the positioning post 32, the mating surface between the housing 21 and the positioning post 32 can form at least an L-shaped seal with a cross-section (parallel to the axial direction of the positioning post 32), forming a labyrinth-like seal structure. This increases the path for external water vapor to flow into the stator assembly 100. Even if the seal fails at the joint between the housing 21 and the positioning post 32 (i.e., the joint gap between the outer surface of the positioning post 32 and the housing 21), external liquid is unlikely to penetrate through the L-shaped seal to the stator winding 40 and the stator core 10, thus improving the reliability of the seal.

[0049] Compared to related technologies that use methods such as applying glue, adding glue plugs, and adding caps for sealing, this application eliminates the need for additional processes after injection molding the housing 21. Reliable sealing can be achieved simply by improving the structure of the housing 21 and the insulating support 30, simplifying the production process and reducing production costs. Furthermore, in related technologies where the stator core 10 positions the injection molding housing 21, the gap between the outer circumference of the stator core 10 and the insulating support 30 and the housing 21 is relatively long. In contrast, the positioning post 32 in this application can be smaller, thus reducing the gap between it and the housing 21. This further reduces the risk of injection molding seal failure of the housing 21 and moisture penetration from the gap into the stator core 10, improving sealing reliability.

[0050] According to the embodiment of the present invention, the electronic water pump 200 is provided with a positioning post 32 by means of an insulating bracket 30. The first sealing part 211 and the second sealing part 212 of the housing 21 are respectively sealed and connected to at least part of the outer peripheral surface of the positioning post 32 and the opening edge of the bracket positioning hole 301, forming a tortuous sealing structure, which greatly enhances the sealing performance at the bracket positioning hole 301. Moreover, after the housing 21 is formed, no subsequent sealing process is required, which is conducive to simplifying the process, reducing costs, and improving the sealing effect of the electronic water pump 200.

[0051] In some embodiments, such as Figure 2 , Figures 4-5 As shown, the wall of the bracket positioning hole 301 is spaced apart from the stator core 10 by a predetermined distance. In other words, the bracket positioning hole 301 will not expose the stator core 10. The positioning post 32 serves to isolate the external moisture environment from the stator core 10, and the insulating bracket 30 integrates the functions of support, positioning, and sealing.

[0052] In some embodiments, continue to refer to Figure 2 , Figure 4 and Figure 5As shown, the housing 21 may further include a third sealing part 213 connected to the second sealing part 212. The third sealing part 213 extends along the inner circumferential surface of the bracket positioning hole 301 and is sealed to at least a portion of the inner circumferential surface of the bracket positioning hole 301. The first sealing part 211, the second sealing part 212, and the third sealing part 213 form a U-shaped seal. When a seal failure occurs at the joint between the housing 21 and the positioning post 32, external liquid is less likely to penetrate through the U-shaped seal to the stator winding 40 and the stator core 10, further improving the sealing effect.

[0053] According to some embodiments of this utility model, such as Figure 2 , Figure 4 and Figure 5 As shown, the bracket positioning hole 301 includes a first hole segment 302 and a second hole segment 303. The second hole segment 303 is located on the side of the first hole segment 302 near the end opening of the bracket positioning hole 301, and the cross-sectional area of ​​the second hole segment 303 perpendicular to the depth direction of the bracket positioning hole 301 is greater than the cross-sectional area of ​​the first hole segment 302 perpendicular to the depth direction of the bracket positioning hole 301.

[0054] The first hole segment 302 and the second hole segment 303 can be cylindrical holes with a cross-section centered on a circle, or holes with a cross-section of any shape such as triangle, polygon, or ellipse.

[0055] The cross-sectional area of ​​the second hole segment 303 perpendicular to the depth direction of the bracket positioning hole 301 (i.e., the arrangement direction of the first hole segment 302 and the second hole segment 303) is greater than the cross-sectional area of ​​the first hole segment 302 perpendicular to the depth direction of the bracket positioning hole 301, so that the inner circumferential surfaces of the first hole segment 302 and the second hole segment 303 include a stepped structure. For example Figure 2 , Figure 4 and Figure 5 The first hole segment 302 and the second hole segment 303 shown are cylindrical holes with different diameters and arranged coaxially, so that the bracket positioning hole 301 is formed as a stepped hole, and the inner circumferential surfaces of the first hole segment 302 and the second hole segment 303 are connected by an annular connecting surface 306.

[0056] The stepped structure allows the positioning fixture of the mold to cooperate with the hole wall of the first hole section 302 with a smaller cross-sectional area to position the stator assembly 100 during the injection molding process of the housing 21. The positioning fixture can be spaced apart from at least part of the hole wall of the second hole section 303 with a larger cross-sectional area, so that the rubber material enters between the hole wall of the second hole section 303 and the positioning fixture. The housing 21 formed can be partially located in the second hole section 303 and connected to the hole wall of the second hole section 303. For example, the third sealing part 213 of the housing 21 can be located in the second hole section 303 and connected to the inner circumferential surface of the second hole section 303, which is beneficial to further improve the sealing performance of the connection between the insulating bracket 30 at the positioning post 32 and the housing 21.

[0057] In some embodiments, the inner circumferential surface of the first hole segment 302 and the inner circumferential surface of the second hole segment 303 are connected by an annular connecting surface 306, which can be circular or square. Thus, the entire inner circumferential surface of the second hole segment 303 can be spaced apart from the positioning fixture during the injection molding process of the housing 21. The third sealing part 213 can be formed as a cylinder and connected to the entire inner circumferential surface of the second hole segment 303, thereby improving the sealing effect at different positions circumferentially of the positioning post 32. Furthermore, the annular connecting surface 306 can be connected to the end face of one axial end of the third sealing part 213 to form a seal.

[0058] Among them, the connecting surface 306 can be as follows Figure 2 , Figures 4-5 The hole extends perpendicular to the depth direction of the bracket positioning hole 301, which simplifies the structure of the bracket positioning hole 301. The first hole segment 302 and the second hole segment 303 are directly connected.

[0059] Alternatively, the connecting surface 306 can be a conical surface, with the diameter of the conical surface increasing in the direction closer to the second hole segment 303. The conical surface is formed as an inwardly inclined surface that moves away from the second hole segment 303. Even if the seal between the connecting surface 306 and the third sealing part 213 fails, external moisture is less likely to flow outward radially along the conical surface, thus improving the effect of blocking external moisture. Furthermore, the first hole segment 302 and the second hole segment 303 are connected by the conical space defined by the conical surface. During the injection molding of the insulating bracket 30, the inner wall of the bracket positioning hole 301 is easier to demold, and it is less likely to form debris, wrinkles, etc. at the connecting surface 306, affecting the seal with the housing 21.

[0060] In some embodiments, such as Figure 1 , Figure 4 and Figure 5 As shown, the inner circumferential surface of the second hole section 303 can be provided with a sealing groove 305, and part of the third sealing part 213 is embedded in the sealing groove 305. This not only increases the connection area 306 between the housing 21 and the positioning post 32, but also makes the joint surface between the housing 21 and the positioning post 32 more tortuous and meandering, increasing the difficulty for water vapor to diffuse into the stator assembly 100 through the joint surface, thereby further improving the sealing effect.

[0061] Here, the shape of the sealing groove 305 can be flexibly set. For example, the sealing groove 305 can be an annular groove or a threaded groove extending circumferentially along the second hole section 303. The annular groove and the threaded groove can block external water vapor from different positions circumferentially of the second hole section 303, thereby improving the sealing effect. Among them, the continuous extension of the threaded groove has a more significant effect in increasing the path required for external water vapor to flow into the stator assembly 100, and it also facilitates the discharge of gas in the threaded groove during the injection molding process of the housing 21, so that the third sealing part 213 can fully fill the space in the threaded groove, reduce sealing defects, and improve the connection strength of the mating surface.

[0062] Furthermore, the cross-sectional shape of the sealing groove 305 parallel to the axial direction of the positioning post 32 is not limited, and can be as follows: Figure 4 The diagram shows a triangle, as shown below. Figure 5 The shape shown is trapezoidal, but it can also be arc-shaped, rectangular, or other shapes. The thread groove can be either a left-hand thread or a right-hand thread.

[0063] In some embodiments of this utility model, such as Figure 1 As shown, there are multiple bracket positioning holes 301, and the multiple bracket positioning holes 301 are evenly spaced along the circumference of the stator core 10.

[0064] It is worth noting that the multiple bracket positioning holes 301 can be formed on multiple positioning posts 32, or multiple bracket positioning holes 301 can be set on one positioning post 32. For example, there can be two, three, or four bracket positioning holes 301. The multiple bracket positioning holes 301 are evenly spaced along the circumference of the stator core 10. This should be interpreted in a general sense, that is, in the circumference of the stator core 10, the included angle between any two adjacent bracket positioning holes 301 about the center line of the stator core 10 is equal; or, the number of bracket positioning holes 301 is even and they are symmetrical about the center line of the stator core 10 in pairs.

[0065] By setting multiple evenly arranged bracket positioning holes 301, the stability of the support and positioning of the stator assembly 100 during the injection molding process can be improved, achieving a good positioning effect. The stator assembly 100 is less likely to deviate, thereby improving the precision of the injection molding connection between the housing 21 and the stator assembly 100 and improving the performance of the electronic water pump 200.

[0066] In some embodiments of this utility model, such as Figures 1-2 and Figures 4-5As shown, the support body 31 includes a core insulation portion 311, a first baffle insulation portion 312, and a second baffle insulation portion 313. The core insulation portion 311 encloses (e.g., through injection molding) the stator core 10. The first baffle insulation portion 312 and the second baffle insulation portion 313 are located at the axial ends of the core insulation portion 311, and the first baffle insulation portion 312, corresponding to the same stator tooth portion of the stator core 10, is located radially inside the second baffle insulation portion 313. The first baffle insulation portion 312 is formed as an inner baffle, and the second baffle insulation portion 313 is formed as an outer baffle. The stator winding 40 can be wound around the core insulation portion 311 and located between the first baffle insulation portion 312 and the second baffle insulation portion 313 to realize the installation and positioning of the stator winding 40 on the insulating support 30.

[0067] Furthermore, the positioning post 32 is at least partially located radially outside the insulation portion 313 of the second baffle, thus increasing the distance between the positioning post 32 and the center line of the insulation support 30. During the injection molding process of the housing 21, when the positioning fixture cooperates with the positioning post 32, it can support and position the stator assembly 100 at a position with a greater distance from the center of the insulation support 30, thereby improving the stability of the stator assembly 100 in terms of support and positioning.

[0068] like Figure 2 , Figure 4 and Figure 5 As shown, the first sealing part 211 is sealed to the radially outer surface of the second baffle insulating part 313. In other words, the first sealing part 211 connects the second baffle insulating part 313 and the positioning post 32. A U-shaped seal can also be formed between the second baffle insulating part 313, the first sealing part 211, and the positioning post 32, which can cooperate with the U-shaped seal between the housing 21 and the positioning post 32 to further improve the sealing effect and reduce the risk of external moisture spreading to the stator winding 40.

[0069] For example, the positioning post 32 and the second baffle insulation portion 313 are radially spaced apart to form a wiring gap 304 between the positioning post 32 and the second baffle insulation portion 313. At least a portion of the lead wire of the stator winding 40 of the stator assembly 100 is located within the wiring gap 304. In other words, the stator winding 40 can pass through the wiring gap 304, and the lead wire is positioned by the second baffle insulation portion 313 and the positioning post 32, making it less likely for the lead wire to interfere with or wobble with other structures, thus improving the stability of the lead wire. Furthermore, after the injection molding housing 21, the first sealing portion 211 can fill the wiring gap 304 and cover the lead wire located within the wiring gap 304, improving the insulation and waterproofing effect of the lead wire.

[0070] In some embodiments, such as Figure 1 and Figure 2As shown, a reinforcing part 34 is provided within the wiring gap 304. The reinforcing part 34 connects to the positioning post 32 and the insulating part 313 of the second baffle, and the lead wire is supported by the reinforcing part 34. The reinforcing part 34 can enhance the supporting effect, reduce the deformation of the positioning post 32, and make the axial position of the lead wire more reasonable, facilitating wire exit.

[0071] In some embodiments, such as Figure 4 As shown, in the axial direction of the stator core 10, the distance between the end face of the second baffle insulation portion 313 away from the core insulation portion 311 and the core insulation portion 311 is H1, and the distance between the end face of the positioning post 32 away from the core insulation portion 311 and the core insulation portion 311 is H2. H1 and H2 may be unequal or equal. In embodiments where H1 and H2 are equal, the structure of the insulation support 30 is simpler. In embodiments where H1 and H2 are unequal, in the axial direction, the second baffle insulation portion 313 and the positioning post 32 can form a certain height difference. For example, if H1 is greater than H2, the second baffle insulation portion 313 is higher than the positioning post 32; if H1 is less than H2, the positioning post 32 is higher than the second baffle insulation portion 313. The height difference facilitates the routing of lead wires within the wiring gap 304. When the lead wires are arranged within the wiring gap 304, they can move along the higher side of the positioning post 32 and the insulation part of the second baffle 313 into the wiring gap 304, making the routing of lead wires more convenient and faster.

[0072] In some specific embodiments, such as Figure 1 As shown, a limiting part 35 is provided on the radially outer side of the second baffle insulation part 313. The limiting part 35 is at least partially offset from the positioning post 32 in the circumferential direction, and the lead wire part is located between the limiting part 35 and the iron core insulation part 311. The limiting part 35 can limit the lead wire in the axial direction, so that the lead wire is limited within the wire routing gap 304 and is not easy to come out, which improves the stability of the lead wire, especially the stability during the injection molding process of the housing 21.

[0073] It is worth noting that in embodiments where there are multiple second baffle insulating portions 313 and multiple positioning posts 32, one or more of the second baffle insulating portions 313 corresponding to the positioning posts 32 may be provided with limiting portions 35, or multiple second baffle insulating portions 313 may all be provided with limiting portions 35.

[0074] In the embodiments of this application, the location and depth of the bracket positioning hole 301 can be flexibly set.

[0075] For example, in some embodiments, such as Figure 2 , Figure 4 and Figure 5As shown, the bracket positioning hole 301 is located on one side of the stator core 10 along its axial direction. In other words, the projections of the bracket positioning hole 301 and the stator core 10 perpendicular to the axial direction do not overlap, so the outer diameter of the stator core 10 will not interfere with the setting position of the bracket positioning hole 301. Therefore, adding the positioning post 32 and the bracket positioning hole 301 to the insulating bracket 30 does not require any modification to the structure of the stator core 10, which can reduce the production cost of the stator core 10. Furthermore, the bracket positioning hole 301 is unlikely to have an adverse effect on the performance of the stator core 10, and it can be matched with stator cores 10 of different sizes, showing strong adaptability.

[0076] It should be noted that in the embodiment where the bracket positioning hole 301 is located on one axial side of the stator core 10, the positioning post 32 can be located on one axial side of the bracket body 31; the positioning post 32 can also be located on the radially outer side of the bracket body 31 and partially extend to one axial side of the bracket body 31. The depth of the bracket positioning hole 301 is less than the axial length of the positioning post 32. All of these are within the protection scope of this utility model.

[0077] For example, in other embodiments, a portion of the bracket positioning hole 301 is located radially outward of the stator core 10, and another portion of the bracket positioning hole 301 is located on one axial side of the stator core 10.

[0078] A portion of the bracket positioning hole 301 is located on the radial outer side of the stator core 10, meaning that the radial projection of this portion of the bracket positioning hole 301 overlaps with that of the stator core 10; another portion of the bracket positioning hole 301 is located on one axial side of the stator core 10, meaning that the radial projection of this portion of the bracket positioning hole 301 does not overlap with that of the stator core 10; wherein, the radial projection refers to the projection of the centerline of the bracket positioning hole 301 onto the direction of the arrangement of the centerline of the stator core 10.

[0079] In the above embodiment, the axial length of the bracket positioning hole 301 is relatively long, allowing for a larger mating dimension with the positioning fixture during the injection molding process of the housing 21, which is beneficial for improving positioning reliability. Furthermore, the portion of the bracket positioning hole 301 located radially outward of the stator core 10 can be reinforced with the stator core 10, resulting in stronger support and positioning capabilities, making it suitable for injection molding schemes with higher impact forces.

[0080] In some specific embodiments, the outer peripheral surface of the stator core 10 is provided with a clearance groove, and some of the bracket positioning holes 301 are located within the clearance groove. Correspondingly, the hole wall of these bracket positioning holes 301 is located within the clearance groove, that is, some of the positioning posts 32 are located within the clearance groove. This not only improves the strength of the positioning posts 32 by utilizing the stator core 10, but also reduces the radial space occupied by the positioning posts 32 and the overall radial dimension of the insulating bracket 30, which is beneficial for miniaturizing the electronic water pump 200.

[0081] The following describes in detail an electronic water pump 200 according to a specific embodiment of the present invention with reference to the accompanying drawings. It is to be understood that the following description is merely illustrative and should not be construed as limiting the present invention.

[0082] like Figure 1 , Figure 3 and Figure 5 As shown, an electronic water pump 200 according to some embodiments of the present invention includes a housing 21, a stator assembly 100, and a rotor assembly. The stator assembly 100 includes a stator core 10, an insulating support 30, and a stator winding 40. The insulating support 30 includes a support body 31 and positioning posts 32 partially embedded in the outer circumferential surface of the support body 31. There are three positioning posts 32, evenly spaced along the circumference of the support body 31. The support body 31 includes a core insulating portion 311, a first baffle insulating portion 312, and a second baffle insulating portion 313. The core insulating portion 311 covers the stator core 10, and the first baffle insulating portion 312 and the second baffle insulating portion 313 are located on both axial sides of the core insulating portion 311.

[0083] The positioning post 32 is connected to the core insulation part 311, and one axial end of the positioning post 32 extends beyond the end face of the core insulation part 311. The extended portion is radially outward from and spaced apart from the second baffle insulation part 313 to form a wiring gap 304. The extended portion of the positioning post 32 is provided with a bracket positioning hole 301, which includes a first hole section 302 with a smaller diameter and a second hole section 303 with a larger diameter. The inner circumferential surface of the second hole section 303 is provided with a threaded groove extending circumferentially. The stator winding 40 is wound on the core insulation part 311 and located between the first baffle insulation part 312 and the second baffle insulation part 313. At least part of the lead wire of the stator winding 40 is located within the wiring gap 304.

[0084] During the injection molding process of the housing 21, the end opening of the bracket positioning hole 301 can be facing downwards, and the stator assembly 100 can be placed in the injection mold. The positioning fixture of the mold extends into the bracket positioning hole 301. The positioning fixture is supported on the bottom wall surface of the first hole section 302 and contacts and engages with the inner circumferential surface of the first hole section 302, thereby achieving axial, radial and circumferential support and positioning of the stator assembly 100.

[0085] The injection-molded housing 21 encloses the stator assembly 100 and seals the stator core 10. The housing 21 includes a first sealing part 211, a second sealing part 212, and a third sealing part 213 connected together. The first sealing part 211 is sealed to the outer circumferential surface of the portion extending beyond the positioning post 32, and a portion of the first sealing part 211 is located within the wiring gap 304. The second sealing part 212 is sealed to the edge of the end opening of the bracket positioning hole 301, i.e., sealed to one axial end face of the positioning post 32. The third sealing part 213 is located within the second hole section 303 and is sealed to the inner circumferential surface of the second hole section 303, with a portion of the third sealing part 213 embedded in a threaded groove.

[0086] In the above embodiment, the insulating bracket 30 is further equipped with a positioning post 32, which is used to support and position the stator assembly 100 in the subsequent injection molding housing 21 process. The wall surface of the positioning hole 301 of the bracket does not contact the stator core 10. Thus, after injection molding, the stator core 10 is not exposed at the positioning point. The positioning post 32 isolates the stator core 10 from the external moisture environment, eliminating the need for a subsequent sealing process. Furthermore, the insulating bracket 30 can wrap around the outer circumference of the stator core 10. The stator assembly 100 is supported and positioned in the injection molding housing 21 process solely through the positioning post 32, reducing the exposed area of ​​other areas of the stator core 10. This reduces the direct contact area between the housing 21 and the stator core 10, helping to lower the risk of moisture contact between the stator core 10 and the housing 21 due to sealing failure.

[0087] Furthermore, the connection between the positioning post 32 and the first sealing part 211, the second sealing part 212, and the third sealing part 213 can form a U-shaped sealing structure. A threaded sealing structure is formed between the third sealing part 213 and the positioning post 32. The combination of the U-shaped seal and the threaded seal greatly enhances the sealing performance at the bracket positioning hole 301. An exposed splicing gap is formed between the positioning post 32 and the third sealing part 213. This splicing gap has a short extension length, which helps reduce the risk of seal failure. Moreover, the U-shaped sealing structure has a bend in its path, so even if the seal at the splicing gap fails, moisture is less likely to flow through the U-shaped path to the stator core 10 or the stator winding 40, further improving the sealing effect.

[0088] like Figure 6As shown, the thermal management system 300 according to an embodiment of the present invention includes an electronic water pump 200 according to an embodiment of the present invention. Since the electronic water pump 200 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the thermal management system 300 according to an embodiment of the present invention, by setting a positioning post 32 through an insulating bracket 30, and sealing the first sealing part 211 and the second sealing part 212 of the housing 21 with at least a portion of the outer peripheral surface of the positioning post 32 and the opening edge of the bracket positioning hole 301 respectively, forms a tortuous sealing structure, which greatly enhances the sealing performance at the bracket positioning hole 301. Furthermore, after the housing 21 is formed, no subsequent sealing process is required, which simplifies the process, reduces costs, and improves the sealing effect of the electronic water pump 200.

[0089] In some embodiments, the thermal management system 300 is an important component for regulating the automotive cabin environment (temperature, humidity, etc.) and the working environment of other parts. The thermal management system 300 mainly includes valves, heat exchangers, compressors, and pumps. The pumps include, for example, an electric water pump 200 or other water pumps. The thermal management system 300 contains a circulating refrigerant, which may be liquid antifreeze or carbon dioxide refrigerant, etc.

[0090] like Figure 6 As shown, the vehicle 1000 according to an embodiment of the present invention includes a thermal management system 300 according to an embodiment of the present invention. Since the thermal management system 300 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the vehicle 1000 according to an embodiment of the present invention, by setting a positioning post 32 through an insulating bracket 30, and sealing the first sealing part 211 and the second sealing part 212 of the housing 21 with at least a portion of the outer peripheral surface of the positioning post 32 and the opening edge of the bracket positioning hole 301 respectively, forms a tortuous sealing structure, which greatly enhances the sealing performance at the bracket positioning hole 301. Furthermore, after the housing 21 is formed, no subsequent sealing process is required, which simplifies the process, reduces costs, and improves the sealing effect of the electronic water pump 200.

[0091] In this embodiment, vehicle 1000 can be a new energy vehicle. In some embodiments, the new energy vehicle can be a pure electric vehicle with an electric motor as the main driving force. In other embodiments, the new energy vehicle can also be a hybrid vehicle with both an internal combustion engine and an electric motor as the main driving force. Regarding the internal combustion engine and electric motor mentioned in the above embodiments that provide driving power for the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide electrical energy to the electric motor can be a power battery, hydrogen fuel cell, etc., without special limitation. It should be noted that this is merely an exemplary description of the structure of new energy vehicles, etc., and is not intended to limit the protection scope of this utility model.

[0092] Other configurations and operations of the thermal management system 300 and vehicle 1000 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0093] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0094] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic water pump characterized by, The stator assembly comprises a stator core and an insulation support, the insulation support comprises a support body and a positioning column, the support body wraps the stator core, and the positioning column is arranged on the support body and is provided with a support positioning hole extending in the axial direction. The shell is an injection body and wraps the stator assembly, the shell comprises a first sealing part and a second sealing part connected with each other, the first sealing part extends along the circumferential direction of the positioning column and is in sealing connection with at least part of the outer circumferential surface of the positioning column, and the second sealing part is located outside the support positioning hole and is in sealing connection with the opening edge of the end part of the support positioning hole. The shell further comprises a third sealing part connected with the second sealing part, the third sealing part extends along the inner circumferential surface of the support positioning hole and is in sealing connection with at least part of the inner circumferential surface of the support positioning hole.

2. The electronic water pump of claim 1, wherein The support positioning hole comprises a first hole section and a second hole section, the second hole section is located on one side of the first hole section close to the opening of the end part of the support positioning hole, and the cross-sectional area of the second hole section perpendicular to the depth direction of the support positioning hole is greater than the cross-sectional area of the first hole section perpendicular to the depth direction of the support positioning hole, and the third sealing part is located in the second hole section and is connected with the inner circumferential surface of the second hole section.

3. The electronic water pump of claim 2, wherein, The inner circumferential surface of the first hole section and the inner circumferential surface of the second hole section are connected by an annular connecting surface, wherein 4. The electronic water pump of claim 3, wherein, The connecting surface extends in the depth direction of the support positioning hole, or the connecting surface is a tapered surface, and the diameter of the tapered surface increases in the direction close to the second hole section. The inner circumferential surface of the second hole section is provided with a sealing groove, and part of the third sealing part is embedded in the sealing groove.

5. The electronic water pump of claim 3, wherein, The groove is an annular groove or a threaded groove extending in the circumferential direction of the second hole section.

6. The electronic water pump of claim 5, wherein, The support positioning hole is a plurality of holes and is arranged at intervals in the circumferential direction of the insulation support.

7. The electronic water pump of claim 1, wherein, The support body comprises a core insulation part, a first baffle insulation part and a second baffle insulation part, the core insulation part wraps the stator core, the first baffle insulation part and the second baffle insulation part are arranged at the axial end parts of the core insulation part, the first baffle insulation part is located radially inside the second baffle insulation part corresponding to the stator core and the stator tooth part, the positioning column is at least partially located radially outside the second baffle insulation part, and the first sealing part is in sealing connection with the radially outer surface of the second baffle insulation part.

8. The electronic water pump of claim 1, wherein, In the axial direction of the stator core, the distance between the end surface of the second baffle insulation part away from the core insulation part and the core insulation part is H1, the distance between the end surface of the positioning column away from the core insulation part and the core insulation part is H2, and H1 and H2 are not equal or equal.

9. The electronic water pump of claim 8, wherein, The hole wall surface of the support positioning hole is spaced apart from the stator core by a predetermined distance.

10. The electronic water pump according to any one of claims 1 to 9, characterized in that The electronic water pump comprises any one of the electronic water pumps according to claims 1-10.

11. A thermal management system, characterized by, The thermal management system comprises the electronic water pump according to claim 11.

12. A vehicle characterized by comprising: ​

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