Casing assembly of electronic water pump, electronic water pump, thermal management system and vehicle

Abstract

The utility model discloses a casing assembly of electronic water pump, electronic water pump, thermal management system and vehicle, the casing assembly of electronic water pump includes: stator assembly, stator assembly includes stator core and insulation support, the insulation support is installed in the stator core, the insulation support has first positioning structure; and the casing wraps the stator assembly through injection molding and enables at least part of the first positioning structure to be exposed. According to the casing assembly of the electronic water pump, the casing wraps the stator assembly in an injection molding mode, the whole production process of the casing assembly is simple, the number of assembling times is small, and after the casing is subjected to injection molding, the stator iron core is wrapped in the insulation support and the casing and does not make direct contact with the outside. According to the stator core, adverse effects of external dust, water vapor and the like on the stator core can be reduced, protection on the performance of the stator core is enhanced, procedures and materials are reduced, 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 housing assembly, 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, the housing of an electric water pump is assembled with the stator assembly after being processed separately, and then sealed with a back cover. This process is complex and costly. Alternatively, after the stator assembly is injection molded, the stator core is fixed by the outer circle of the stator core, the housing is encapsulated, and then the mating area of ​​the stator core is sealed by methods such as potting, welding, or adding a back cover. This process is also complex and costly. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a housing assembly for an electronic water pump, wherein the housing and stator assembly are integrally machined without assembly, and no sealing operation is required on the outer circumference of the stator core after injection molding of the housing, resulting in a simple process and low cost.

[0004] Another objective of this invention is to provide an electronic water pump having the aforementioned housing assembly of an electronic water pump.

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

[0006] Another objective of this invention is to provide a vehicle having the aforementioned thermal management system.

[0007] The housing assembly of the 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 bracket, the insulating bracket being mounted on the stator core and having a first positioning structure; and a housing, the housing being injection molded to enclose the stator assembly and exposing at least part of the first positioning structure.

[0008] According to the embodiment of the present invention, the housing assembly of the electronic water pump is made by injection molding the housing to encapsulate the stator assembly. The entire production process of the housing assembly is simple, with fewer assembly steps. After the housing is injection molded, the stator core is encapsulated in the insulating bracket and the housing and does not come into direct contact with the outside world. This reduces the adverse effects of external dust, moisture, etc. on the stator core, strengthens the protection of the stator core's performance, and helps to reduce processes and materials, thereby reducing costs.

[0009] In addition, the housing assembly of the electronic water pump according to the above embodiments of the present invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the first positioning structure is disposed on the outer peripheral surface of the insulating bracket, and at least a portion of the outer peripheral surface of the first positioning structure is exposed outside the housing.

[0011] According to some embodiments of the present invention, the insulating support has at least two of the first positioning structures arranged at circumferential intervals along the insulating support.

[0012] According to some embodiments of the present invention, the central angle between any two adjacent first positioning structures in the circumferential direction about the center of the insulating bracket is less than 180°.

[0013] According to some embodiments of the present invention, at least one of the first positioning structures includes a first positioning groove.

[0014] According to some embodiments of the present invention, the cross-sectional profile of the first positioning groove perpendicular to the axial direction is arc-shaped.

[0015] According to some embodiments of the present invention, the insulating bracket includes a bracket body and a first positioning structure. The first positioning structure protrudes from the outer peripheral surface of the bracket body, and the housing at least covers the area of ​​the outer peripheral surface of the bracket body where the first positioning structure is not provided.

[0016] According to some embodiments of the present invention, the outer peripheral surface of the first positioning structure includes a first arc surface, and the first arc surfaces of multiple first positioning structures are circular.

[0017] According to some embodiments of the present invention, the outer peripheral surface of the first positioning structure is provided with at least one radially outward protruding reinforcing rib, and the housing at least partially covers the reinforcing rib; and / or, the outer peripheral surface of the first positioning structure is provided with at least one radially inward recessed groove, and the housing at least partially fills the groove.

[0018] According to some embodiments of the present invention, one axial end face of the first positioning structure is a positioning surface, and the positioning surface is exposed outside the housing.

[0019] According to some embodiments of the present invention, the housing assembly of the electronic water pump further includes a rotating shaft, the axial end wall of the housing is connected to the rotating shaft, and the positioning surface faces the axial end wall of the housing.

[0020] According to some embodiments of the present invention, the insulating bracket is injection molded to wrap the stator core, and the outer peripheral surface of the stator core is provided with a second positioning structure, at least a portion of the outer peripheral surface of the second positioning structure being connected to the housing.

[0021] The electronic water pump according to an embodiment of the present invention includes a housing assembly of the electronic water pump according to an embodiment of the present invention.

[0022] 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.

[0023] The vehicle according to an embodiment of the present invention includes a thermal management system according to an embodiment of the present invention.

[0024] 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

[0025] 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:

[0026] Figure 1 This is a bottom view of the housing assembly of the electronic water pump according to an embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of the stator assembly according to an embodiment of the present utility model;

[0028] Figure 3 yes Figure 2 Top view;

[0029] Figure 4 yes Figure 1 Partial structural sectional view;

[0030] Figure 5 yes Figure 2 A sectional view;

[0031] Figure 6 yes Figure 1 A sectional view;

[0032] Figure 7 This is a schematic diagram of a vehicle according to an embodiment of the present utility model.

[0033] Figure label:

[0034] Vehicle 1000; Thermal management system 300; Electric water pump 200; Housing assembly 100;

[0035] Stator assembly 10;

[0036] Stator core 20; second positioning structure 21; second positioning slot 211; second arc surface 212; stator winding 22;

[0037] Insulating bracket 30; bracket body 31; first positioning structure 32; first positioning groove 321; first arc surface 322; reinforcing rib 323; positioning surface 324;

[0038] Housing 40; end wall 41; shaft 50; connector 60; terminal bracket 70. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In related technologies, the insulating bracket and housing of the electronic water pump are injection molded separately before being assembled with the stator core, a complex process. Furthermore, the positioning holes on the housing need to be sealed after assembly; otherwise, the stator core will be exposed, increasing sealing costs.

[0043] This application proposes a housing assembly 100 for an electronic water pump 200, in which the housing 40 is formed by enclosing the injection-molded stator assembly 10, reducing the assembly process between the housing 40 and the stator assembly 10, and eliminating the need to seal the housing 40, thus saving costs.

[0044] The housing assembly 100 of the electronic water pump 200 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0045] Reference Figures 1-6 As shown, the housing assembly 100 of the electronic water pump 200 according to an embodiment of the present invention may include: a stator assembly 10 and a housing 40.

[0046] Specifically, the stator assembly 10 includes a stator core 20 and an insulating support 30, with the insulating support 30 mounted on the stator core 20. The insulating support 30 provides insulation between the stator core 20 and other components, reducing the current in the stator core 20 and thus reducing the losses in the stator core 20.

[0047] In some embodiments, the stator assembly 10 further includes a stator winding 22, which is mounted on an insulating support 30. The insulating support 30 can achieve insulation between the stator core 20 and the stator winding 22, and stably mount the stator winding 22 on the stator core 20, such as stably winding it on the stator teeth of the stator core 20.

[0048] The housing 40 is injection molded to encapsulate the stator assembly 10. That is, the housing 40 can be formed by injection molding, and the connection and relative fixation between the housing 40 and the stator assembly 10 can be completed simultaneously during the injection molding process, so as to make the entire housing assembly 100 structurally stable.

[0049] In the process of manufacturing the housing assembly 100, the stator assembly 10 can be placed in the injection mold first, and then the housing 40 can be injection molded. After demolding, the housing assembly 100 can be obtained. The whole production process is simple, without the need for multiple injection molding, and also saves the assembly process between the stator assembly 10 and the housing 40, simplifying the design of parts and process assembly costs.

[0050] And, as Figures 1-2 As shown, the insulating bracket 30 has a first positioning structure 32, which is at least partially exposed after the housing 40 is injection molded. In other words, the first positioning structure 32 can be used to position the housing 40 during injection molding, without the need for the stator core 20 or other structures to position it. After the housing 40 is injection molded, the stator core 20 is enclosed within the insulating bracket 30 and the housing 40, preventing the stator core 20 from directly contacting the outside world. This strengthens the seal of the stator core 20, reduces the possibility of external dust and moisture contacting it, and minimizes the adverse effects of external factors on the performance of the stator core 20, thus enhancing its protection.

[0051] Furthermore, the insulating bracket 30 is not prone to corrosion or other adverse phenomena. Even without potting or sealing the exposed first positioning structure 32, the structure of the insulating bracket 30 will not be adversely affected. Therefore, depending on actual needs, it is not necessary to add additional sealing materials and sealing processes, resulting in lower costs and easier promotion. The insulating bracket 30 can be made of insulating materials such as plastic.

[0052] It is worth noting that "the housing 40 exposes at least part of the first positioning structure 32" means that the housing 40 itself will not cover the exposed part of the first positioning structure 32. However, according to actual needs, such as to improve the integrity of the outer surface of the housing 40, the exposed part of the first positioning structure 32 can be blocked or covered by other structures, which is also within the protection scope of this invention.

[0053] According to the embodiment of the present invention, the housing assembly 100 of the electronic water pump 200 is injection molded to encapsulate the stator assembly 10. The entire production process of the housing assembly 100 is simple, with fewer assembly steps. After the housing 40 is injection molded, the stator core 20 is encapsulated within the insulating bracket 30 and the housing 40 and does not directly contact the outside world. This reduces the adverse effects of external dust, moisture, etc., on the stator core 20, strengthens the protection of the stator core 20's performance, and helps to reduce processes and materials, thereby lowering costs.

[0054] In some embodiments, to prevent the insulating support 30 from melting due to high temperature or deforming due to injection pressure during the injection molding process of the housing 40, the insulating support 30 can be made of a high-strength material resistant to high temperatures. For example, the heat distortion temperature of the insulating support 30 can be greater than or equal to the injection molding temperature of the housing 40.

[0055] In some specific embodiments, the housing 40 is made of thermoplastic material, such as PPS, PPA, PA, etc. In some specific embodiments, the insulating support 30 is made of thermoplastic or thermosetting material, such as PPS, bakelite, etc. The material of the housing 40 and the insulating support 30 can be the same or different, as long as the insulating support 30 meets the requirements of high temperature resistance, impact resistance, and not easily melting or deforming during injection molding.

[0056] The first positioning structure 32 can be disposed on the end face, outer peripheral surface, etc. of the insulating bracket 30, and can be used to position the injection molding of the housing 40. For example, in some embodiments, such as Figures 1-3 As shown, the first positioning structure 32 is disposed on the outer peripheral surface of the insulating bracket 30, and at least part of the outer peripheral surface of the first positioning structure 32 is exposed outside the housing 40. This facilitates the clamping of the first positioning structure 32 and the radial, axial and circumferential positioning of the housing 40 along the outer peripheral surface of the insulating bracket 30 during injection molding. After the housing 10 is injection molded, the outer peripheral surface of the stator core 20 is sealed and wrapped in the housing 10 and the insulating bracket 30, which helps to strengthen the circumferential sealing of the stator core 20.

[0057] In some embodiments of this utility model, such as Figures 1-3 As shown, the insulating bracket 30 has at least two first positioning structures 32 arranged at intervals along the circumference of the insulating bracket 30. The at least two first positioning structures 32 can apply two clamping forces to the insulating bracket 30 to fix the position of the insulating bracket 30, which is beneficial to the subsequent injection molding of the housing 40.

[0058] In some embodiments, such as Figures 1-3 As shown, the insulating bracket 30 has at least three first positioning structures 32 arranged at intervals along its circumference. These at least three first positioning structures 32 allow for the application of at least three clamping forces to fix the position of the insulating bracket 30, making it easier and more stable to fix its position. Furthermore, based on the three-point plane principle, applying clamping forces to the insulating bracket 30 through the at least three first positioning structures 32 reduces the shaking of the insulating bracket 30, resulting in more accurate positioning and improved injection molding precision of the subsequent housing 40.

[0059] The different first positioning structures 32 need to have a certain positional relationship to meet the clamping requirements of the insulating support 30. For example, in some embodiments, such as Figure 3 As shown, the central angle between any two adjacent first positioning structures 32 in the circumferential direction about the center of the insulating bracket 30 is less than 180°. This ensures that if a radial straight line is drawn arbitrarily through the center of the insulating bracket 30, and both sides of this radial straight line are provided with first positioning structures 32, the clamping force applied by the multiple first positioning structures 32 can ultimately be concentrated on the insulating bracket 30, satisfying the clamping requirements of the insulating bracket 30.

[0060] For example, in some embodiments, such as Figure 3 As shown, the insulating support 30 has three first positioning structures 32, with the included angles between any two of the three first positioning structures 32 being a, b, and c, respectively, where a < 180°, b < 180°, and c < 180°, such that a + b > 180°, a + c > 180°, and b + c > 180°. This facilitates clamping the insulating support 30 and achieves radial and circumferential positioning of the insulating support 30. For example, a, b, and c are all 120°.

[0061] In some embodiments where the insulating support 30 has at least three first positioning structures 32, such as Figures 1-3As shown, at least one first positioning structure 32 includes a first positioning groove 321, which is used to achieve circumferential positioning of the insulating bracket 30, reduce the possibility of the insulating bracket 30 rotating in the circumferential direction when clamping the insulating bracket 30, and finally fix the relative position between the stator assembly 10 and the mold of the injection molding machine housing 40 in the circumferential and radial directions, thereby enhancing the reliability of injection molding.

[0062] The cross-sectional profile of the first positioning groove 321 perpendicular to the axial direction can be arc-shaped, polygonal, or irregular. For example, in some embodiments, such as Figures 1-3 As shown, the cross-sectional profile of the first positioning groove 321 perpendicular to the axial direction is arc-shaped, which can reduce sharp corners to reduce stress concentration, reduce the possibility of defects such as fracture at the first positioning groove 321, improve the mechanical strength of the insulating bracket 30, and facilitate the molding and demolding of the first positioning groove 321, making it easier to form.

[0063] The first positioning groove 321 can be parallel to the axial direction or at a certain angle to the axial direction. For example, in some embodiments, such as Figure 2 As shown, the first positioning groove 321 extends axially to facilitate injection molding.

[0064] In some embodiments of this utility model, such as Figures 1-3 As shown, the insulating support 30 includes a support body 31 and a first positioning structure 32. The first positioning structure 32 protrudes from the outer peripheral surface of the support body 31, which can increase the thickness of the insulating support 30 at the first positioning structure 32 to improve mechanical strength.

[0065] The housing 40 covers at least the area on the outer periphery of the support body 31 where the first positioning structure 32 is not provided. The exposed area on the outer periphery of the stator core 20 in the stator assembly 10 is located in this area. The housing 40 covers at least this area, so that the housing 40 and the insulating support 30 seal and enclose the stator core 20, which is beneficial to protect the stator core 20.

[0066] In some specific embodiments, the housing 10 may also partially enclose the first positioning structure 32 to improve the connection strength between the housing 10 and the insulating support 30.

[0067] In some embodiments, such as Figures 1-3 As shown, the outer peripheral surface of the first positioning structure 32 includes a first arc surface 322, and the first arc surfaces 322 of the multiple first positioning structures 32 are concentric. That is, the radii of the first arc surfaces 322 of the multiple first positioning structures 32 are equal and their centers coincide, so that when clamping the first positioning structure 32, the resultant force of the clamping force of the multiple first positioning structures 32 points to the same center, which can more stably clamp the insulating bracket 30, reduce the possibility of the insulating bracket 30 shaking when the injection molding machine housing 40 is used, and improve the reliability of fixing the insulating bracket 30.

[0068] For example, in some specific embodiments, such as Figure 3 As shown, the insulating bracket 30 has three first positioning structures 32, and the radii of the first arc surfaces 322 of the three first positioning structures 32 are equal, and the center of each arc surface is the center of the insulating bracket 30. This makes the resultant force of clamping the three first positioning structures 32 point towards the center of the insulating bracket 30, making the clamping more stable.

[0069] In some embodiments, such as Figures 2-4 As shown, the outer peripheral surface of the first positioning structure 32 is provided with at least one radially outward protruding reinforcing rib 323. The housing 40 at least partially covers the reinforcing rib 323, which helps to increase the contact area between the housing 40 and the insulating support 30, reduce the possibility of cracking at the joint surface between the housing 40 and the insulating support 30 under harsh working conditions such as thermal shock, and improve the structural strength of the housing assembly 100.

[0070] The reinforcing rib 323 can be provided at the end, middle, or other locations on the outer peripheral surface of the first positioning structure 32. For example, in some embodiments, such as... Figures 1-3 As shown, a reinforcing rib 323 is provided at both ends of the outer peripheral surface of the first positioning structure 32, which helps to further increase the contact area between the housing 40 and the insulating bracket 30, and also helps to protect the strength of the edge joint surface between the housing 40 and the first positioning structure 32, thus improving the structural strength of the housing assembly 100.

[0071] In some embodiments, the outer circumferential radius of the portion of the housing 40 that encloses the first positioning structure 32 is greater than the outer circumferential radius of the portion of the housing 40 that does not enclose the first positioning structure 32, which helps to make the wall thickness of the housing 40 more uniform and improve the injection molding reliability of the housing 40.

[0072] In some embodiments, the outer peripheral surface of the first positioning structure 32 is provided with at least one radially inwardly recessed groove, and the housing 40 at least partially fills the groove. During injection molding of the housing 40, the material fills the space between the mold and the stator assembly 10 to form the housing 40. The material filling the groove forms a reinforcing structure of the housing 40, which helps to increase the contact area between the housing 40 and the insulating support 30, protects the strength of the edge joint surface between the housing 40 and the first positioning structure 32, reduces the possibility of cracking of the joint surface between the housing 40 and the insulating support 30 under harsh working conditions such as thermal shock, and improves the structural strength of the housing assembly 100.

[0073] In some embodiments, the outer peripheral surface of the first positioning structure 32 is provided with at least one radially outward protruding reinforcing rib 323, the housing 40 at least partially covers the reinforcing rib 323, and the outer peripheral surface of the first positioning structure 32 is provided with at least one radially inward recessed groove, the housing 40 at least partially fills the groove, which is beneficial to further increase the contact area between the housing 40 and the insulating support 30 and improve the structural strength of the housing assembly 100.

[0074] In some embodiments of this utility model, such as Figure 1 and Figures 5-6 As shown, one axial end face of the first positioning structure 32 is a positioning surface 324, which is exposed outside the housing 40. The positioning surface 324 can be used to position the stator assembly 10 during injection molding of the housing 40, thereby fixing the relative position between the stator assembly 10 and the mold of the injection molding housing 40 and improving the relative position accuracy between the injection-molded housing 40 and the stator assembly 10.

[0075] It should be noted that when the injection molding machine housing is 40mm, the material is usually transported from one end of the axial direction to the other (e.g., ...). Figure 6 The material is poured from top to bottom or from the side inwards, ensuring uniform filling of the injection mold and reducing the possibility of weld lines on the wall of the housing 40, thus improving the strength of the housing 40 and the electric water pump 200. Therefore, under the impact of the material, the axial degree of freedom of the stator assembly 10 at the other end can be constrained, eliminating the need for positioning fixtures to constrain the stator assembly 10 towards the other axial end (e.g., during injection molding). Figure 6 The middle direction is used for auxiliary positioning (upper end).

[0076] In some embodiments, such as Figure 1 and Figure 6 As shown, during injection molding of the housing 40, the material is poured from top to bottom. The lower positioning surface 324 can be supported and positioned by an axial positioning fixture, which can constrain the axial downward degree of freedom of the stator assembly 10. The part that mates with the axial positioning fixture is exposed in the housing 40 after the housing 10 is injection molded. Furthermore, the first positioning groove 321 and the first arc surface 322 can mate with the fixture to constrain the radial and circumferential degrees of freedom of the stator assembly 10. Therefore, the first positioning groove 321, the first arc surface 322, and the positioning surface 324 can constrain the circumferential, radial, and axial downward degrees of freedom of the stator assembly 10, reducing the possibility of relative movement and relative rotation between the stator assembly 10 and the mold of the injection molding housing 40, improving the relative positional accuracy of the stator assembly 10 and the housing 40, and providing a strong constraint effect.

[0077] In some embodiments, such as Figure 6 As shown, the housing assembly 100 also includes a rotating shaft 50. One axial end wall 41 of the housing 40 is connected to the rotating shaft 50, and the positioning surface 324 faces the axial end wall 41 of the housing 40. The part where the end wall 41 is connected to the rotating shaft 50 can fix the rotating shaft 50, which helps to improve the installation stability between the rotating shaft 50 and the housing 40.

[0078] During the injection molding process of housing 40, stator assembly 10 and shaft 50 can be placed into the injection mold together. After the injection molding of housing 40 is completed, housing 40 and stator assembly 10 can be injection molded into one piece, and housing 40 and shaft 50 can also be injection molded into one piece, further reducing assembly steps and costs.

[0079] In some embodiments of this utility model, such as Figures 2-3 and Figure 5 As shown, the insulating bracket 30 is injection molded to encapsulate the stator core 20. That is, the insulating bracket 30 can be formed by injection molding, and the connection between the insulating bracket 30 and the stator core 20 can be completed simultaneously during the injection molding process, without having to form the insulating bracket 30 separately and then assemble it, which simplifies the production process and reduces assembly costs.

[0080] In some related technologies, the insulating bracket consists of two brackets, an upper bracket and an lower bracket. The two brackets need to be injection molded separately using two sets of injection molds, and then paired and installed, resulting in high material and installation costs.

[0081] In some embodiments of this application, during the injection molding of the stator assembly 10, the stator core 20 can be placed in the injection mold first, and then the insulating bracket 30 can be injection molded. After demolding, the stator assembly 10 can be obtained. The whole production process is simple, requiring only one set of injection molds for the insulating bracket 30. Multiple injection moldings are not required, and the assembly process between the various parts of the stator assembly 10 is eliminated, reducing material costs and installation costs.

[0082] And, as Figures 2-3 As shown, the stator core 20 has a second positioning structure 21 on its outer peripheral surface, and at least a portion of the outer peripheral surface of the second positioning structure 21 is connected to the housing 40. That is, after the insulating bracket 30 is injection molded, the second positioning structure 21 is at least partially exposed. During the injection molding process, the second positioning structure 21 can position the insulating bracket 30. After the housing 40 is injection molded, it encloses the second positioning structure 21 exposed on the insulating bracket 30. The insulating bracket 30 and the housing 40 achieve a sealed enclosure of the stator core 20, reducing the impact of the external environment on the stator core 20 and strengthening its protection.

[0083] In some embodiments, the second positioning structure 21 includes a second positioning groove 211 and a second arc surface 212. The second positioning groove 211 and the second arc surface 212, in conjunction with the fixture, can constrain the degrees of freedom of the stator core 20 in the radial and circumferential directions, reducing the possibility of relative movement and rotation between the stator core 20 and the mold of the injection-molded insulating support 30, and improving the relative positional accuracy between the stator core 20 and the insulating support 30.

[0084] The cross-sectional profile of the second positioning groove 211 perpendicular to the axial direction can be arc-shaped, polygonal, or irregular, etc. The second positioning groove 211 can be parallel to the axial direction or at a certain angle to the axial direction. This utility model does not limit this.

[0085] The housing assembly 100 of an electronic water pump 200 according to a specific embodiment of the present invention is described in detail below with reference to the accompanying drawings. It should be understood that the following description is merely illustrative and should not be construed as limiting the present invention.

[0086] like Figures 1-6 As shown, according to a specific embodiment of the present invention, the housing assembly 100 includes a stator assembly 10, a housing 40, and a rotating shaft 50.

[0087] The housing 40 is integrally connected to the stator assembly 10 and the shaft 50 by injection molding. The stator assembly 10 includes a stator core 20, an insulating support 30, and a stator winding 22. The insulating support 30 is injection molded to wrap the stator core 20, and the stator winding 22 is wound around the insulating support 30.

[0088] The outer circumferential surface of the stator core 20 is provided with three second positioning structures 21, each including a second positioning groove 211 and a second arc surface 212. The function of the second positioning structure 21 is to position the stator core 20 for the subsequent injection molding of the insulating bracket 30, preventing positional movement and rotation. The second positioning groove 211 can prevent the stator core 20 from rotating.

[0089] The insulating support 30 includes a support body 31 and three first positioning structures 32. The first positioning structures 32 protrude radially outward on the outer peripheral surface of the support body 31. The included angles between each pair of the three first positioning structures 32 are a, b, and c, respectively, where a, b, and c are all 120°. The first positioning structure 32 includes a first positioning groove 321 and a first arc surface 322. The two ends of the outer peripheral surface of the first positioning structure 32 are respectively provided with radially outward protruding reinforcing ribs 323. The lower end surface of the first positioning structure 32 is a positioning surface 324.

[0090] The function of the first positioning structure 32 is to position the subsequent injection molding housing 40 process and prevent positional movement and rotation. Among them, a, b, and c are all 120°, which can clamp the stator assembly 10 during injection molding of the housing 40. The first positioning groove 321 and the first arc surface 322 can cooperate with the fixture to constrain the degrees of freedom of the stator assembly 10 in the radial and circumferential directions. The positioning surface 324 can constrain the degrees of freedom of the stator assembly 10 in the axial downward direction. The reinforcing rib 323 can reduce the possibility of cracking at the joint surface between the housing 40 and the insulating support 30.

[0091] In the process of injection molding the stator assembly 10, the second positioning structure 21 is first clamped and the stator core 20 is placed into the injection mold. Then, the insulating bracket 30 is injection molded. After demolding, the stator assembly 10 is obtained. At this time, the outer periphery of the stator core 20, except for the second positioning structure 21, is completely covered by the insulating bracket 30, and the second positioning structure 21 is exposed outside the insulating bracket 30. The injection molded stator assembly 10 only requires one set of injection molds and does not require further assembly of the insulating bracket 30 and the stator core 20, which simplifies the production process and reduces assembly costs.

[0092] During the injection molding of the housing assembly 100, the first positioning structure 32 is first clamped to place the stator assembly 10 into the injection mold, and the rotating shaft 50 is also placed into the injection mold. Then, the housing 40 is injection molded. After demolding, the housing assembly 100 is obtained. At this time, the part of the outer surface of the stator core 20 that is not covered by the insulating support 30 (such as the second positioning structure 21, the inner circumferential surface of the teeth of the stator core 20), the gap between the stator winding 22 and the insulating support 30, etc. are all covered by the housing 40. The first positioning groove 321, part of the first arc surface 322 and part of the positioning surface 324 are exposed.

[0093] After the housing assembly 100 is injection molded, the housing 40 is injection molded to wrap the reinforcing rib 323 to connect with the insulating bracket 30, thus achieving a sealed enclosure of the stator core 20. This reduces the adverse effects of external factors on the performance of the stator core 20 and strengthens its protection. Furthermore, the injection molding of the reinforcing rib 323 onto the housing 40 helps reduce the possibility of cracking at the interface between the housing 40 and the insulating bracket 30 under harsh conditions such as thermal shock, thereby improving the structural strength of the housing assembly 100.

[0094] like Figure 7 As shown, the electronic water pump 200 according to an embodiment of the present invention includes a housing assembly 100. Since the housing assembly 100 of the electronic water pump 200 according to the present invention has the aforementioned beneficial technical effects, the entire production process of the electronic water pump 200 according to the present invention, which involves injection molding the housing 40 to encapsulate the stator assembly 10, resulting in the housing assembly 100, is simple, involves fewer assembly steps, and after injection molding, the stator core 20 is encapsulated within the insulating support 30 and the housing 40 without direct contact with the outside world. This reduces the adverse effects of external dust and moisture on the stator core 20, strengthens the protection of the stator core 20's performance, and helps reduce processes and materials, thus lowering costs.

[0095] In some embodiments, the housing assembly 100 includes a terminal bracket 70, which is integrally injection molded with the insulating bracket 30. The electric water pump 200 includes a connector 60, which has connection terminals. The terminal bracket 70 has a terminal slot, and the connection terminals can be inserted into the terminal slot and connected to the stator winding 22 to realize the electrical connection of the stator winding 22.

[0096] In some embodiments, the position of the stator core 20 is fixed by the second positioning structure 21, which enables the relative positions of the insulating support 30 and the terminal support 70 to be positioned during the injection molding of the insulating support 30. The position of the stator assembly 10 is fixed by the first positioning structure 32, which enables the relative positions of the stator assembly 10 and the housing 40 to be fixed during the injection molding of the housing 40. This satisfies the relative positional requirements between the terminal support 70 and the stator winding 22, and between the terminal support 70 and the housing 40, allowing the connector 60 to accurately insert into the terminal support 70 during assembly with the housing 40, thus achieving accurate electrical connection with the stator winding 22.

[0097] In some embodiments, the electric water pump 200 further includes a rotor assembly, an end cover, a pump housing, and an impeller. The rotor assembly is mounted within the stator assembly 10 and sleeved on the shaft 50. The end cover seals one end of the housing assembly 100 (e.g., Figure 6 The lower end of the middle housing assembly 100), and the other end of the pump housing cover housing assembly 100 (e.g., the lower end of the middle housing assembly 100). Figure 6 The upper end of the housing assembly 100 defines the pump chamber. The impeller is located inside the pump chamber and is connected to the rotor assembly, rotating under the drive of the rotor assembly to drive the fluid.

[0098] like Figure 7 As shown, the thermal management system 300 according to an embodiment of the present invention includes an electronic water pump 200. Since the electronic water pump 200 according to the present invention has the aforementioned beneficial technical effects, the thermal management system 300 according to the present invention simplifies the entire production process of injection molding the housing 40 around the stator assembly 10 to obtain the housing assembly 100, reduces the number of assembly steps, and ensures that after injection molding, the stator core 20 is encased within the insulating support 30 and the housing 40 without direct contact with the outside environment. This reduces the adverse effects of external dust and moisture on the stator core 20, strengthens the protection of the stator core 20's performance, and helps reduce processes and materials, thus lowering costs.

[0099] 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 components. The thermal management system 300 mainly includes valves, heat exchangers, compressors, and pumps, such as an electric water pump 200 or other water pumps. The thermal management system 300 contains a circulating refrigerant.

[0100] like Figure 7 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 entire production process of the vehicle 1000 according to an embodiment of the present invention, which involves injection molding the housing 40 to encapsulate the stator assembly 10 to obtain the housing assembly 100, is simple, involves fewer assembly steps, and after injection molding, the stator core 20 is encapsulated within the insulating bracket 30 and the housing 40 without direct contact with the outside world. This reduces the adverse effects of external dust, moisture, etc., on the stator core 20, strengthens the protection of the stator core 20's performance, and helps reduce processes and materials, thus lowering costs.

[0101] 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 primary 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 primary driving force. Regarding the internal combustion engine and electric motor mentioned in the above embodiments that provide driving power to the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc., as fuel, and the method of providing electrical energy to the electric motor can use a power battery, hydrogen fuel cell, etc., without special limitations. It should be noted that this is merely an illustrative description of the structure of new energy vehicles, etc., and is not intended to limit the scope of protection of this invention.

[0102] Other configurations and operations of the electronic water pump 200, 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.

[0103] 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.

[0104] 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.

[0105] 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 electronics water pump housing assembly, characterized by, The stator assembly comprises a stator core and an insulation support mounted on the stator core, the insulation support having a first positioning structure. The casing is injection molded to wrap the stator assembly and expose at least part of the first positioning structure. The first positioning structure is arranged on the outer circumferential surface of the insulation support, and at least part of the outer circumferential surface of the first positioning structure is exposed to the casing.

2. The electronic water pump housing assembly of claim 1, wherein, The insulation support has at least two first positioning structures arranged at intervals along the circumferential direction of the insulation support.

3. The electronic water pump housing assembly of claim 1, wherein, Any two circumferentially adjacent first positioning structures have a central angle with respect to the center of the insulation support less than 180°.

4. The electronic water pump housing assembly of claim 3, wherein, At least one of the first positioning structures comprises a first positioning groove.

5. The electronic water pump housing assembly of claim 3, wherein, The cross-sectional profile of the first positioning groove perpendicular to the axial direction is arc-shaped.

6. The electronic water pump housing assembly of claim 5, wherein, The insulation support comprises a support body and the first positioning structure, the first positioning structure being protrudingly arranged on the outer circumferential surface of the support body, and the casing at least wrapping the outer circumferential surface of the support body excluding the region where the first positioning structure is arranged.

7. The electronic water pump housing assembly of claim 3, wherein, The outer circumferential surface of the first positioning structure comprises a first arc surface, and the first arc surfaces of multiple first positioning structures share a common circle.

8. The electronic water pump housing assembly of claim 7, wherein, The outer circumferential surface of the first positioning structure is provided with at least one radially outward protruding reinforcing rib, and the casing at least partially wraps the reinforcing rib.

9. The electronic water pump housing assembly of claim 7, wherein, And / or, The outer circumferential surface of the first positioning structure is provided with at least one radially inward recessed groove, and the casing at least partially fills the groove. One end surface of the first positioning structure in the axial direction is a positioning surface, and the positioning surface is exposed to the casing.

10. The electronic water pump housing assembly of claim 3, wherein, Further comprising a rotating shaft, one end wall of the casing in the axial direction is connected to the rotating shaft, and the positioning surface faces the one end wall of the casing in the axial direction.

11. The electronic water pump housing assembly of claim 10, wherein, The insulation support is injection molded to wrap the stator core, the outer circumferential surface of the stator core is provided with a second positioning structure, and at least part of the outer circumferential surface of the second positioning structure is connected to the casing.

12. The electronic water pump enclosure assembly of any one of claims 1-11, wherein, The casing assembly of the electronic water pump according to any one of claims 1-12.

13. An electronic water pump characterized by The electronic water pump according to claim 13.

14. A thermal management system characterized by, The thermal management system according to claim 14.

15. A vehicle characterized by comprising: ​

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