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, an insulation support and a positioning column, the insulation support wraps the stator iron core, and the positioning column is arranged on the insulation support; the motor comprises a stator assembly, a positioning column and a motor shell, the stator assembly is arranged in the motor shell, the motor shell is an injection molding body and wraps the stator assembly in an injection molding mode, at least part of the positioning column is located outside the motor shell, or at least part of the surface of the positioning column is exposed, and the positioning column is used for positioning the stator assembly when the motor shell is subjected to injection molding. According to the electronic water pump provided by the embodiment of the utility model, the stator assembly is positioned through the exposed surface or the exposed structure of the positioning column in the process of injection molding of the shell, so that a positioning tool does not cause adverse effects on the structure of the shell and a sealing structure between the shell and the stator assembly, and the sealing effect is improved; and a subsequent sealing process is not needed after the casing is formed, so that the process is simplified and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic water pump technical field, more specifically, relate to an electronic water pump, thermal management system and vehicle. BACKGROUND

[0002] Electronic water pump is widely used because of high efficiency, control precision and other advantages. In related technology, when the shell of the electronic water pump is injection molded, the stator assembly is placed in the mold, and the positioning tool of the mold is in contact with the stator assembly for supporting and positioning the stator assembly. After the shell is injection molded, the positioning tool is removed, and a hole or a notch will be formed at the position of the positioning tool. The seal at the hole or the notch is easy to fail, and external moisture is easy to enter from the hole or the notch and enter the shell through the bonding surface, corroding the stator core or the stator winding and causing reliability problems. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. Therefore, one purpose of the utility model is to provide an electronic water pump, which can save the subsequent sealing process and meet the sealing requirements.

[0004] The utility model further provides a thermal management system with the above-mentioned electronic water pump.

[0005] The utility model further provides a vehicle with the above-mentioned thermal management system.

[0006] According to the electronic water pump of the utility model embodiment, the positioning tool will not cause adverse effects on the structure of the shell and the sealing structure between the shell and the stator assembly, the sealing effect is improved, and the shell does not need subsequent sealing process after forming, which is beneficial to simplify the process and reduce the cost.

[0007] According to the electronic water pump of the utility model embodiment, the exposed surface or exposed structure of the positioning column is used to position the stator assembly during the injection molding of the shell, so that the positioning tool will not cause adverse effects on the structure of the shell and the sealing structure between the shell and the stator assembly, the sealing effect is improved, and the shell does not need subsequent sealing process after forming, which is beneficial to simplify the process and reduce the cost.

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

[0009] According to some embodiments of the present application, the positioning column comprises a first column segment and a second column segment connected in sequence, the first column segment is connected with the insulating support, the second column segment is connected with the shell, and the end surface of the second column segment away from the first column segment is coplanar with the end surface of one end of the shell in the axial direction.

[0010] According to some embodiments of the present application, the insulating support is provided with a positioning hole, and the positioning column is inserted into the positioning hole in an interference fit.

[0011] According to some embodiments of the present application, the insulating support is provided with a positioning hole, and the positioning column is connected to the positioning hole in an injection molding manner.

[0012] According to some embodiments of the present application, the positioning column is integrally formed on the insulating support.

[0013] According to some embodiments of the present application, the positioning column is sealingly connected with the insulating support, and the sealing surface is a concave-convex surface; and / or the positioning column is sealingly connected with the shell, and the sealing surface is a concave-convex surface.

[0014] According to some embodiments of the present application, the outer surface of the positioning column is provided with external threads, and the insulating support is provided with internal threads matched with the external threads; and / or the outer surface of the positioning column is provided with external threads, and the shell is provided with internal threads matched with the external threads.

[0015] According to some embodiments of the present application, the insulating support is provided with an annular groove, the annular groove extends around the positioning column, and part of the shell is filled in the annular groove.

[0016] According to some embodiments of the present application, the positioning column is a plurality of and is arranged at intervals along the circumference of the insulating support.

[0017] According to some embodiments of the present application, the positioning column is spaced apart from the stator core by a predetermined distance.

[0018] The heat management system according to the embodiments of the present application comprises the electronic water pump according to the embodiments of the present application.

[0019] The vehicle according to the embodiments of the present application comprises the heat management system according to the embodiments of the present application.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

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

[0022] Figure 1 is a structural schematic view of a stator assembly according to some embodiments of the present utility model, wherein the positioning column is not shown;

[0023] Figure 2 is a structural schematic view of a stator assembly according to some embodiments of the present utility model;

[0024] Figure 3 is a structural schematic view of an electronic water pump according to some embodiments of the present utility model;

[0025] Figure 4 is a sectional view of an electronic water pump according to a first embodiment of the present utility model, wherein the positioning column is interference fit with the insulating support;

[0026] Figure 5 is a partial sectional view of an electronic water pump according to a second embodiment of the present utility model, wherein the positioning column is injection molded with the insulating support;

[0027] Figure 6 is a partial sectional view of an electronic water pump according to a third embodiment of the present utility model, wherein the positioning column is injection molded with the insulating support;

[0028] Figure 7 is a sectional view of an electronic water pump according to a fourth embodiment of the present utility model, wherein the positioning column is integrally formed with the insulating support;

[0029] Figure 8 is a partial sectional view of an electronic water pump according to a fifth embodiment of the present utility model, wherein the positioning column is integrally formed with the insulating support;

[0030] Figure 9 is a partial sectional view of an electronic water pump according to a sixth embodiment of the present utility model, wherein the positioning column is integrally formed with the insulating support;

[0031] Figure 10 is a partial sectional view of an electronic water pump according to a seventh embodiment of the present utility model, wherein the positioning column is integrally formed with the insulating support;

[0032] Figure 11 is a partial sectional view of an electronic water pump according to an eighth embodiment of the present utility model, wherein the positioning column is integrally formed with the insulating support;

[0033] Figure 12 is a schematic view of a vehicle according to an embodiment of the present utility model.

[0034] Reference signs:

[0035] Thermal management system 1000; vehicle 2000;

[0036] Electronic water pump 100; positioning tool 200;

[0037] Stator assembly 10; stator core 11; insulating support 12; positioning hole 121; annular groove 122; positioning column 13; first column segment 131; second column segment 132; third column segment 133; concave-convex surface 14; stator winding 15;

[0038] Casing 20; accommodating cavity 201; sink 202; boss 203;

[0039] Support shaft 30. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0041] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0042] In the description of the present application, "first feature" and "second feature" can include one or more features, and "multiple" means two or more, and "above" or "below" of the first feature to the second feature can include direct contact of the first and second features, or can include indirect contact of the first and second features through another feature therebetween, and "above", "over" and "on" of the first feature to the second feature include directly above and obliquely above of the first feature to the second feature, or only indicate that the first feature is higher than the second feature in horizontal height.

[0043] In the related art, when the shell of the electronic water pump is injection molded, the stator assembly is placed in a mold, and a positioning tool of the mold is in contact with the stator assembly for supporting and positioning the stator assembly. After the shell is injection molded, the mold positioning tool is removed, and a hole or a notch is formed at the position of the positioning tool. The sealing at the hole or the notch is easy to fail, external water vapor is easy to enter from the hole or the notch, and enter the inside of the shell through the bonding surface, corrode the stator core or the stator winding, and cause reliability problems. In some related technologies, a sealing method such as gluing, adding a sealing plug, or adding a lid is used, and the above sealing methods have many materials, complex process, and high cost.

[0044] Therefore, the electronic water pump 100 is proposed in the present application. The exposed surface or exposed structure of the positioning column 13 is used to position the stator assembly 10 during the injection molding of the shell 20, so that the positioning tool 200 does not adversely affect the structure of the shell 20 and the sealing structure between the shell 20 and the stator assembly 10, improves the sealing effect, and eliminates the need for subsequent sealing processes after the shell 20 is formed, which is beneficial to simplify the process and reduce the cost.

[0045] Next, the electronic water pump 100 according to the embodiments of the present application is described with reference to the accompanying drawings.

[0046] Referring to Figures 1-4 The electronic water pump 100 according to the embodiments of the present application includes a stator assembly 10 and a shell 20.

[0047] Specifically, the stator assembly 10 includes a stator core 11, an insulating support 12, and a positioning column 13. The insulating support 12 wraps the stator core 11, and the positioning column 13 is arranged on the insulating support 12. The shell 20 is an injection molded body and injection molded to wrap the stator assembly 10. At least part of the positioning column 13 is located outside the shell 20, or at least part of the surface of the positioning column 13 is exposed, and the positioning column 13 is used to position the stator assembly 10 during the injection molding of the shell 20.

[0048] The insulating support 12 can be an injection molded body and injection molded to wrap the stator core 11, or the insulating support 12 can be separately formed and then assembled with the stator core 11. The injection molded body means that the insulating support 12 can be integrally injection molded, that is, the entire insulating support 12 is obtained by one-time injection molding, and the injection molding connection of the insulating support 12 and the stator core 11 is realized at the same time. During the production of the stator assembly 10, the stator core 11 can be placed in a mold for injection molding of the insulating support 12, then pouring is performed, and after cooling, demolding is performed to obtain the insulating support 12 injection molded to wrap the stator core 11. Then, the stator winding 15 of the stator assembly 10 can be wound on the insulating support 12.

[0049] For example, in some embodiments, the insulating support 12 is provided with a tooth positioning hole, a part of the axial one end surface of the stator tooth of the stator core 11 is opposite to the tooth positioning hole and exposed through the tooth positioning hole; the axial one end surface of the tooth shoe of the stator core 11 is at least partially exposed to the insulating support 12, and at least part of the inner circumferential surface of the tooth shoe is exposed to the insulating support 12. During the process of injection molding the insulating support 12, the positioning tooling of the mold can be supported on the axial one end surface of the stator tooth, the axial one end surface of the tooth shoe and the inner circumferential surface of the tooth shoe to realize the axial, radial and circumferential positioning of the stator core 11; after demolding, the positioning tooling is removed, and the exposed end surface of the tooth and the exposed end surface of the tooth shoe are formed.

[0050] Through the cooperation of the exposed end surface of the tooth and the exposed end surface of the tooth shoe, the positioning during the process of injection molding the insulating support 12 is not dependent on the outer circumferential surface of the stator core 11, so that the outer circumferential surface of the stator core 11 can not be exposed to the insulating support 12, thereby reducing the exposed area of the stator core 11 and improving the sealing effect after the injection molding of the casing 20.

[0051] Of course, according to actual needs, in some embodiments, the outer circumferential surface of the stator core 11 can also be at least partially exposed for positioning during the process of injection molding the insulating support 12, which is within the protection scope of the present application.

[0052] The positioning column 13 is arranged on the insulating support 12. Here, the positioning column 13 can be arranged on the axial side of the insulating support 12, or on the radial outer side of the insulating support 12, etc., as long as the positioning column 13 is connected with the insulating support 12.

[0053] The casing 20 is an injection molded body and injection molded to wrap the stator assembly 10, so that the casing 20 can wrap the stator winding 15 and the position of the stator core 11 which is not wrapped by the insulating support 12, etc., to realize the insulation and sealing of the stator winding 15 and the stator core 11 from the outside, so that the water vapor in the outside is not easy to cause corrosion to the stator assembly 10.

[0054] In addition, at least part of the positioning column 13 is located outside the casing 20, or at least part of the surface of the positioning column 13 is exposed. Here, at least part of the positioning column 13 can be at least one section in the height direction (such as the axis direction of the cylindrical positioning column 13) of the positioning column 13 which is located outside the casing 20, or at least one part perpendicular to the height direction, etc.; at least part of the surface of the positioning column 13 can be at least one part of the end surface of the positioning column 13 in the height direction, or at least one part of the side surface perpendicular to the height direction, etc.

[0055] The exposed surface or structure of the positioning post 13 is not interfered with by the housing 20. Therefore, during the injection molding of the housing 20, the positioning fixture 200 can cooperate with the exposed surface or structure of the positioning post 13 to achieve the positioning of the stator assembly 10, so that the stator assembly 10 is positioned stably. During the injection molding of the housing 20, the stator assembly 10 is less likely to shift or tilt, which would affect the effect of the housing 20 wrapping the stator assembly 10.

[0056] Furthermore, since the positioning fixture 200 and the positioning post 13 are located outside the housing 20, there is no connection between the positioning fixture 200 and the housing 20. After the housing 20 is injection molded, there is no need to separate the positioning fixture 200 from the housing 20. This avoids adverse effects on the structure of the housing 20 and the connection structure between the housing 20 and the stator assembly 10 caused by separating the positioning fixture 200, and helps to improve the sealing effect of the housing 20 on the stator assembly 10.

[0057] For example Figure 5 As shown, a section of the positioning post 13 in the height direction is located outside the housing 20. During the injection molding process of the housing 20, the positioning fixture 200 can be positioned as follows: Figure 5 The exposed portion of the positioning post 13 shown is either abutted against the end face of the exposed portion of the positioning post 13, or simultaneously cooperates with the end face and circumferential surface of the exposed portion of the positioning post 13, so as to realize the positioning of the positioning post 13, and thereby realize the positioning of the stator assembly 10, so that the stator assembly 10 is not easily offset or tilted during the injection molding process of the injection molding machine housing 20.

[0058] It is worth noting that at least a portion of the surface of the positioning post 13 is exposed. This exposed surface can be a positioning surface for mating with the positioning fixture 200, or it can be a surface formed after the positioning post 13 has been cut or otherwise processed after the housing 20 has been injection molded. For example... Figures 4-10 As shown, after the housing 20 is injection molded, the positioning post 13 is not switched or otherwise processed, so that a section of the positioning post 13 in the height direction remains outside the housing 20, reducing processing steps; for example... Figure 11 As shown, before the housing 20 is injection molded, a section of the positioning post 13 in the height direction is located outside the housing 20 and is used to cooperate with the positioning fixture 200 for positioning. After the housing 20 is injection molded, the exposed section of the positioning post 13 can be cut off so that only one end face of the positioning post 13 in the height direction is coplanar with the surface of the housing 20, so that the positioning post 13 does not protrude from the surface of the housing 20 and avoids interference with other structures.

[0059] Compared with the sealing methods in related technologies, such as applying glue, adding glue plugs and adding caps, this application does not require an additional sealing process after the injection molding machine housing 20. Reliable sealing can be achieved by changing the positioning position of the stator assembly 10 during the injection molding process of the machine housing 20, which simplifies the production process and reduces production costs.

[0060] The electronic water pump 100 according to the embodiment of the present application positions the stator assembly 10 through the exposed surface or exposed structure of the positioning column 13 in the process of injection molding the machine shell 20, so that the positioning tool 200 does not adversely affect the structure of the machine shell 20 and the sealing structure between the machine shell 20 and the stator assembly 10, improves the sealing effect, and after the machine shell 20 is formed, no subsequent sealing process is required, which is beneficial to simplify the process and reduce the cost.

[0061] In the embodiment of the present application, the connection mode of the positioning column 13 and the insulating support 12 can be flexibly set.

[0062] For example, in some embodiments, as shown in Figure 4 The insulating support 12 is provided with a positioning hole 121, and the positioning column 13 is interference-fitted in the positioning hole 121. In the production process, the insulating support 12 and the positioning column 13 can be separately processed and formed, for example, after the insulating support 12 is injection-molded to wrap the stator core 11, the insulating support 12 is formed with the positioning hole 121, and then the positioning column 13 is interference-fitted at the positioning hole 121 of the insulating support 12 to realize reliable connection of the positioning column 13 and the insulating support 12, and better sealing between the positioning column 13 and the insulating support 12 can be realized. The materials of the positioning column 13 and the insulating support 12 do not affect each other, for example, the insulating support 12 can be made of plastic or other insulating materials, and the positioning column 13 can be made of plastic or other materials with higher strength.

[0063] For another example, in some embodiments, as shown in Figures 5-6 The insulating support 12 is provided with a positioning hole 121, and the positioning column 13 is injection-molded and connected in the positioning hole 121. In the production process, the positioning column 13 can be processed and formed first, and then placed in the mold for injection-molding the insulating support 12, so that the injection-molding of the insulating support 12 realizes the injection-molding connection with the positioning column 13, and the subsequent assembly process is saved, and the sealing of the injection-molding connection of the insulating support 12 and the positioning column 13 is better, and the injection-molding connection is not affected by the shape and surface smoothness of the positioning column 13, for example, the surface of the positioning column 13 can be a smooth cylindrical surface, or can be provided with a threaded or concave-convex structure. Moreover, the materials of the positioning column 13 and the insulating support 12 do not affect each other, and the same material can be used, or different materials can be selected as needed.

[0064] For another example, in some embodiments, as shown in Figures 7-11 The positioning column 13 is integrally formed on the insulating support 12. In the production process, the insulating support 12 and the positioning column 13 can be obtained by injection molding through an injection mold at the same time, so that the subsequent assembly process is saved, the connection is reliable, and the production efficiency is improved. Moreover, the positioning between the positioning column 13 and the insulating support 12 is more accurate

[0065] In some embodiments of the utility model, as shown in Figures 4-10 Positioning column 13 includes first column section 131, second column section 132 and third column section 133 that are connected in sequence.

[0066] The connection mode of first column section 131 and insulating support 12 includes but is not limited to interference fit, injection molding and integral molding, etc. Second column section 132 is injection molded with casing 20. Third column section 133 is located outside casing 20, so that third column section 133 can be used to cooperate with positioning tooling 200 (for example as shown in Figure 5 Positioning tooling 200 can be located outside casing 20, and the connection between casing 20 and second column section 132, the connection between casing 20 and insulating support 12, and the connection between insulating support 12 and first column section 131 will not cause adverse effects, so that the sealing structure at each location is not easily damaged due to the removal of positioning tooling 200, and the sealing reliability is improved.

[0067] In some other embodiments of the utility model, as shown in Figure 11 Positioning column 13 includes first column section 131 and second column section 132 that are connected in sequence. First column section 131 is connected with insulating support 12, and second column section 132 is connected with casing 20. The end surface of second column section 132 opposite to first column section 131 is coplanar with the end surface of one axial end of casing 20.

[0068] The connection mode of first column section 131 and insulating support 12 includes but is not limited to interference fit, injection molding and integral molding, etc. Second column section 132 is injection molded with casing 20.

[0069] The end surface of second column section 132 opposite to first column section 131 can be abutted with positioning tooling 200 during the injection molding of casing 20 to realize the positioning of stator assembly 10, or the end surface of second column section 132 can be exposed by cutting off third column section 133 after the injection molding of casing 20 is completed. By making the end surface of second column section 132 opposite to first column section 131 coplanar with the end surface of one axial end of casing 20, positioning column 13 does not protrude from the outer surface of casing 20, so that interference with other structures is avoided. Furthermore, the axial end of casing 20 can cooperate with positioning column 13 to position stator assembly 10, and the positioning effect of the rotational direction and axial support of stator assembly 10 is better.

[0070] In some embodiments of the utility model, as shown in Figure 5 , Figure 6 and Figure 8As shown, the positioning post 13 is sealed to the insulating bracket 12, and the sealing surface is a concave-convex surface 14. For example, a concave-convex structure can be provided on the surface of the positioning post 13 to form a concave-convex surface 14. Then, the insulating bracket 12 is injection molded to connect with the positioning post 13, and the insulating bracket 12 forms a concave-convex surface 14 that fits tightly with the concave-convex surface 14 of the positioning post 13, thus forming a sealing surface with a concave-convex surface 14. As another example, a threaded structure can be provided on the surface of the positioning post 13, and a matching threaded structure can be provided on the insulating bracket 12. After completion, the positioning post 13 is screwed onto the insulating bracket 12 to form a threaded connection, and the sealing surface formed is a concave-convex surface 14.

[0071] Compared to a smooth surface, the uneven surface 14 can increase the surface area, making the sealing surface extension path between the positioning post 13 and the insulating support 12 more curved and varied, which is more conducive to improving the sealing effect between the positioning post 13 and the insulating support 12, reducing the risk of external moisture entering the stator assembly 10 through the space between the positioning post 13 and the insulating support 12, and reducing the risk of seal failure.

[0072] In some specific embodiments, reference continues to be made to... Figure 5 , Figure 6 and Figure 8 As shown, the outer surface of the positioning post 13 is provided with external threads, and the insulating bracket 12 is provided with internal threads that match the external threads. The internal and external threads can be connected by screwing, which facilitates assembly; the internal and external threads can also be connected by injection molding, which results in a tighter connection. Furthermore, the thread structure allows for smoother material flow during injection molding, ensuring more complete filling of the positioning hole 121, reducing air bubbles and other voids, and improving the sealing effect between the positioning post 13 and the insulating bracket 12.

[0073] The cross-sectional shape of the thread structure perpendicular to the helical extension direction is not limited; for example, the cross-section can be triangular, trapezoidal, circular arc, rectangular, etc. The thread can be clockwise or counterclockwise along the circumference of the positioning post 13.

[0074] In some embodiments where the positioning post 13 and the insulating bracket 12 are interference-fitted, the surface of the positioning post 13 can be a smooth surface, and the sealing surface between the positioning post 13 and the insulating bracket 12 can be a smooth surface, which can reduce the damage to the sealing surface during the installation of the positioning post 13 onto the insulating bracket 12.

[0075] In some embodiments of this utility model, such as Figure 5 As shown, the positioning post 13 is sealed to the housing 20, and the sealing surface is a concave-convex surface 14. For example, a concave-convex structure can be provided on the surface of the positioning post 13 so that the surface of the positioning post 13 is formed as a concave-convex surface 14. Then, the injection molded housing 20 is connected to the positioning post 13, and the housing 20 forms a concave-convex surface 14 that fits tightly with the concave-convex surface 14 of the positioning post 13, thereby forming a sealing surface 14.

[0076] Compared to a smooth surface, the uneven surface 14 can increase the surface area, making the sealing surface extension path between the positioning post 13 and the housing 20 more curved and varied, which is more conducive to improving the sealing effect between the positioning post 13 and the housing 20, reducing the risk of external moisture entering the stator assembly 10 through the space between the positioning post 13 and the housing 20, and reducing the risk of seal failure.

[0077] In some specific embodiments, reference continues to be made to... Figure 5 As shown, the outer surface of the positioning post 13 is provided with external threads, and the housing 20 is provided with internal threads that match the external threads. During the injection molding process of the housing 20, the material can flow along the external threads of the positioning post 13 and fully wrap the surface of the positioning post 13, reducing the gap between the housing 20 and the positioning post 13, improving the sealing effect, and reducing the risk of later sealing failure.

[0078] In some embodiments of this utility model, such as Figures 4-11 As shown, the insulating bracket 12 is provided with an annular groove 122, which extends around the positioning post 13, and part of the housing 20 is filled in the annular groove 122.

[0079] Thus, the bottom surface of the annular groove 122, the opposing inner groove wall surface and the outer groove wall surface can generally form a U-shaped sealing surface. For example, the outer surface of the positioning post 13, the part of the housing 20 filled in the annular groove 122 and the insulating support 12 generally form a U-shaped sealing surface, which extends the sealing path and makes the sealing path more tortuous, which is more conducive to reducing the risk of external moisture entering the positioning component.

[0080] In some embodiments, the insulating support 12 includes a column with a positioning hole 121 and an annular groove 122. The annular groove 122 surrounds and communicates with the positioning hole 121, and the first column segment 131 of the positioning column 13 is located within the positioning hole 121. Thus, the outer surface of the second column segment 132, the bottom surface of the annular groove 122, the outer groove wall of the annular groove 122, the end face of one axial end of the column, and the outer peripheral surface of the column can all be sealed to the housing 20, generally forming an S-shaped sealing surface, further improving the sealing effect.

[0081] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, there are multiple positioning posts 13, and the multiple positioning posts 13 are evenly spaced along the circumference of the insulating bracket 12.

[0082] By setting multiple evenly arranged positioning posts 13, the stability of the support and positioning of the stator assembly 10 during the injection molding process can be improved, achieving a good positioning effect. The stator assembly 10 is less likely to deviate, thereby improving the precision of the injection molding connection between the housing 20 and the stator assembly 10 and improving the performance of the electronic water pump 100.

[0083] In some embodiments, such as Figures 4-7 As shown, the positioning post 13 is spaced apart from the stator core 11 by a predetermined distance. In other words, the positioning post 13 is designed to prevent the stator core 11 from being exposed. In embodiments where the positioning post 13 is plugged into or injection molded to the insulating bracket 12, the wall of the positioning hole 121 of the insulating bracket 12 is spaced apart from the stator core 11 by a predetermined distance, so that the stator core 11 is not exposed at the positioning hole 121. The insulating bracket 12 can effectively isolate the external moisture environment from the stator core 11.

[0084] The electronic water pump 100 according to some specific embodiments of the present invention is described in detail below with reference to the accompanying drawings. It is worth understanding that the following description is merely illustrative and should not be construed as limiting the present invention.

[0085] like Figures 1-4 As shown, the electronic water pump 100 according to the first embodiment of the present invention includes a housing 20, a pump cover, a stator assembly 10, a rotor assembly, an impeller assembly, and a support shaft 30. The housing 20 has a receiving cavity 201, and the pump cover has a pump chamber and covers the end opening of the receiving cavity 201. The housing 20 is an injection-molded body, and the stator assembly 10 and one end of the support shaft 30 are injection-molded and encapsulated. The stator assembly 10 is arranged around the receiving cavity 201, and one end of the support shaft 30 is injection-molded and connected to the end wall of one axial end of the receiving cavity 201. The support shaft 30 is partially located inside the receiving cavity 201. The rotor assembly is located inside the receiving cavity 201 and is rotatably sleeved on the support shaft 30. The impeller assembly is located inside the pump chamber and connected to the rotor assembly. The impeller assembly rotates under the drive of the rotor assembly to realize the pumping of liquid in the pump chamber.

[0086] The stator assembly 10 includes a stator core 11, an insulating support 12, a stator winding 15, and positioning posts 13. Three positioning posts 13 are evenly spaced along the circumference of the insulating support 12. The insulating support 12 includes a core insulating portion, a first baffle insulating portion, and a second baffle insulating portion. The core insulating portion covers the stator core 11, and the first and second baffle insulating portions are located on opposite axial sides of the core insulating portion. The core insulating portion has three axially extending posts, and the three positioning posts 13 are respectively interference-fitted into the positioning holes 121 of the three posts.

[0087] The positioning hole 121 of the column is spaced apart from the stator core 11, greatly reducing the possibility of the stator core 11 surface coming into contact with the external environment. The first column segment 131 of the positioning column 13 is interference-fitted into the positioning hole 121, while the second column segment 132 and the third column segment 133 of the positioning column 13 are exposed on the insulating bracket 12. During injection molding of the housing 20, the third column segment 133 serves as a clamping part. Through the cooperation of the positioning fixture 200 and the third column segment 133, the stator assembly 10 is supported and positioned, and the housing 20 can be injection molded and connected to the second column segment 132. After the housing 20 is injection molded, the positioning fixture 200 is removed, and the third column segment 133 is exposed on the surface of the housing 20.

[0088] In the above embodiments, the stator assembly 10 is supported and positioned to achieve reliable sealing, while eliminating the sealing processes such as potting, adding glue plugs or caps in related technologies, thus reducing costs.

[0089] like Figure 5 As shown, the electronic water pump 100 according to the second embodiment of the present invention differs from the electronic water pump 100 of the first embodiment in that the outer peripheral surfaces of the first column segment 131 and the second column segment 132 of the positioning column 13 are provided with threads. The positioning column 13 is injection molded to the insulating bracket 12. When the insulating bracket 12 and the housing 20 are injection molded, the material enters the threads of the corresponding column segment, increasing the bonding force between the insulating bracket 12 and the housing 20 and the positioning column 13 respectively, increasing the path of external water vapor flowing into the stator assembly 10, and greatly enhancing the sealing performance.

[0090] The thread only serves a sealing function and can be designed in different shapes as needed, such as triangle, rectangle, arc, left-hand thread, right-hand thread, etc.

[0091] like Figure 6 As shown, the electronic water pump 100 according to the third embodiment of the present invention differs from the electronic water pump 100 of the first embodiment in that the outer peripheral surface of the first column segment 131 of the positioning column 13 is provided with threads, and the positioning column 13 is injection molded to the insulating bracket 12. When the insulating bracket 12 is injection molded, the material enters the thread of the corresponding column segment to greatly enhance the sealing performance.

[0092] like Figure 7 As shown, the electronic water pump 100 according to the fourth embodiment of the present invention differs from the electronic water pump 100 of the first embodiment in that the positioning post 13 is integrally formed on the insulating bracket 12, which saves the assembly process of the positioning post 13 and the insulating bracket 12.

[0093] like Figure 8 As shown, the electronic water pump 100 according to the fifth embodiment of the present invention differs from the electronic water pump 100 of the fourth embodiment in that the outer peripheral surface of the second column section 132 of the positioning column 13 is provided with threads, and the material enters the threads when the injection molding machine housing 20 is used to greatly enhance the sealing performance.

[0094] like Figure 9 As shown, the electronic water pump 100 according to the sixth embodiment of the present invention differs from the electronic water pump 100 of the fourth embodiment in that the end face of the housing 20 at one axial end is provided with a sink 202, and the positioning post 13 passes through the bottom surface of the sink 202.

[0095] like Figure 10 As shown, the electronic water pump 100 according to the seventh embodiment of the present invention differs from the electronic water pump 100 of the fourth embodiment in that a boss 203 is provided on the end face of one axial end of the housing 20, and a positioning post 13 passes through the end face of the boss 203.

[0096] like Figure 11 As shown, the electronic water pump 100 according to the eighth embodiment of the present invention differs from the electronic water pump 100 of the fourth embodiment in that, after the housing 20 is injection molded, the third column segment 133 of the positioning column 13 is cut off so that the positioning column 13 does not protrude from the surface of the housing 20 and is less likely to interfere with other structures.

[0097] like Figure 12 As shown, the thermal management system 1000 according to an embodiment of the present invention includes an electronic water pump 100 according to an embodiment of the present invention. Since the electronic water pump 100 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the thermal management system 1000 according to an embodiment of the present invention positions the stator assembly 10 during the injection molding process of the housing 20 by means of the exposed surface or exposed structure of the positioning post 13. This ensures that the positioning fixture 200 does not adversely affect the structure of the housing 20 or the sealing structure between the housing 20 and the stator assembly 10, thus improving the sealing effect. Furthermore, no subsequent sealing process is required after the housing 20 is molded, which simplifies the process and reduces costs.

[0098] In some embodiments, the thermal management system 1000 is an important component for regulating the automotive cabin environment (temperature, humidity, etc.) and the working environment of other parts. The thermal management system 1000 mainly includes valves, heat exchangers, compressors, and pumps. The pumps include, for example, an electric water pump 100 or other water pumps. The thermal management system 1000 contains a circulating refrigerant, which may be carbon dioxide refrigerant, etc.

[0099] like Figure 12As shown, the vehicle 2000 according to an embodiment of the present invention includes a thermal management system 1000 according to an embodiment of the present invention. Since the thermal management system 1000 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the vehicle 2000 according to an embodiment of the present invention positions the stator assembly 10 during the injection molding process of the housing 20 via the exposed surface or structure of the positioning post 13. This prevents the positioning fixture 200 from adversely affecting the structure of the housing 20 and the sealing structure between the housing 20 and the stator assembly 10, thus improving the sealing effect. Furthermore, no subsequent sealing process is required after the housing 20 is molded, which simplifies the process and reduces costs.

[0100] In this embodiment, vehicle 2000 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 limitations. 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 scope of protection of this utility model.

[0101] Other configurations and operations of the electronic water pump 100, thermal management system 1000, and vehicle 2000 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0102] 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.

[0103] 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.

[0104] 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 in that, include: A stator assembly, comprising a stator core, an insulating support, and a positioning post, wherein the insulating support encloses the stator core, and the positioning post is disposed on the insulating support; A housing, wherein the housing is an injection-molded body and the stator assembly is injection-molded, wherein at least a portion of the positioning post is located outside the housing, or at least a portion of the surface of the positioning post is exposed, the positioning post being used to position the stator assembly during the injection molding of the housing.

2. The electronic water pump according to claim 1, characterized in that, The positioning post includes a first post segment and a second post segment connected in sequence. The first post segment is connected to the insulating bracket, and the second post segment is connected to the housing. The end face of the second post segment facing away from the first post segment is coplanar with the end face of one axial end of the housing; or... The positioning column includes a first column segment, a second column segment, and a third column segment connected in sequence. The first column segment is connected to the insulating bracket, the second column segment is connected to the housing, and the third column segment is located outside the housing.

3. The electronic water pump according to claim 1, characterized in that, The insulating bracket is provided with a positioning hole, and the positioning post is interference-fitted into the positioning hole.

4. The electronic water pump according to claim 1, characterized in that, The insulating bracket is provided with a positioning hole, and the positioning post is injection molded into the positioning hole.

5. The electronic water pump according to claim 1, characterized in that, The positioning post is integrally formed into the insulating bracket.

6. The electronic water pump according to claim 1, characterized in that, The positioning post is sealed to the insulating bracket, and the sealing surface is a concave-convex surface; and / or, The positioning post is sealed to the housing, and the sealing surface is concave and convex.

7. The electronic water pump according to claim 6, characterized in that, The outer surface of the positioning post is provided with external threads, and the insulating bracket is provided with internal threads that match the external threads; and / or, The outer surface of the positioning post is provided with external threads, and the housing is provided with internal threads that match the external threads.

8. The electronic water pump according to claim 1, characterized in that, The insulating bracket has an annular groove that extends around the positioning post, and part of the housing is filled in the annular groove.

9. The electronic water pump according to claim 1, characterized in that, The positioning posts are multiple and spaced apart along the circumference of the insulating bracket.

10. The electronic water pump according to any one of claims 1-9, characterized in that, The positioning post is spaced apart from the stator core by a predetermined distance.

11. A thermal management system, characterized in that, Includes the electronic water pump according to any one of claims 1-10.

12. A vehicle, characterized in that, Including the thermal management system according to claim 11.

Images