Electronic water pump, thermal management system and vehicle

Abstract

The utility model discloses an electronic water pump, a heat management system and a vehicle. The first end part in the axial direction of the supporting shaft is connected with the machine shell, and a limiting groove is formed in the peripheral surface of the second end part in the axial direction of the supporting shaft; the thrust piece is at least partially arranged on the supporting shaft in a sleeving mode, and the thrust piece comprises a limiting protrusion embedded into the limiting groove; the rotor assembly is located in the machine shell and rotatably arranged on the supporting shaft in a sleeving mode, and the rotor assembly is located between the first end and the thrust piece. According to the electronic water pump, the thrust part is installed on the supporting shaft, the coaxiality of the thrust part and the supporting shaft can be improved, the thrust part and the supporting shaft are not prone to relative deflection, the limiting effect on the rotor assembly is good, the thrust part can be installed on the supporting shaft through the cooperation of the limiting protrusion and the limiting groove, and therefore the thrust part can be installed on the supporting shaft conveniently. Installation is convenient and fast, the installation structure and installation steps of the thrust part can be simplified, and practicability is high.

Description

Technical Field

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

[0002] Electric water pumps are widely used due to their advantages such as high efficiency and precise control. In related technologies, the thrust washers of electric water pumps are usually fixed to the pump cover by injection molding. However, it is difficult to ensure the coaxiality of the thrust washers and the support shaft, resulting in poor limiting effect on the rotor assembly. Furthermore, additional support columns need to be set on the pump cover to install the thrust washers. These support columns can easily affect the fluid flow in the pump chamber and reduce the working efficiency of the electric water pump. 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 an electronic water pump that improves the coaxiality of the thrust member and the support shaft, provides better limiting effect, and whose installation structure does not easily obstruct the fluid flow of the electronic water pump, resulting in higher working efficiency.

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

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

[0006] An electronic water pump according to an embodiment of the present invention includes: a housing; a support shaft, wherein a first axial end of the support shaft is connected to the housing, and a limiting groove is provided on the outer peripheral surface of a second axial end of the support shaft; a thrust member, wherein the thrust member is at least partially sleeved on the support shaft, and the thrust member includes a limiting protrusion embedded in the limiting groove; and a rotor assembly, wherein the rotor assembly is located inside the housing and rotatably sleeved on the support shaft, and the rotor assembly is located between the first end and the thrust member.

[0007] According to the embodiment of the present invention, the electronic water pump has a thrust member installed on the support shaft, which helps to improve the coaxiality between the thrust member and the support shaft, making it less likely for the thrust member and the support shaft to misalign. This provides a better limiting effect on the rotor assembly. Furthermore, the thrust member can be installed on the support shaft through the cooperation of the limiting protrusion and the limiting groove, making the installation more convenient. This simplifies the installation structure and steps of the thrust member, reduces manufacturing difficulty and cost, and makes it highly practical.

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

[0009] According to some embodiments of the present invention, the limiting groove is an annular groove that extends continuously along the circumference of the support shaft, and the thrust member extends along the circumference of the support shaft and has a break.

[0010] According to some embodiments of the present invention, the circumferential dimension of the disconnection opening along the support shaft is smaller than the outer diameter of the bottom wall of the limiting groove.

[0011] According to some embodiments of the present invention, the thrust member is an arc-shaped washer, the arc-shaped washer including the limiting protrusion and the limiting portion connected in sequence along the radial direction, and the end face of the limiting portion facing the first end is used to limit the rotor assembly.

[0012] According to some embodiments of the present invention, the thrust member includes a cylindrical body extending circumferentially along the support shaft, wherein a portion of the cylindrical body is deformed inward to form the limiting protrusion, and a recess opposite to the limiting protrusion is formed on the outer peripheral surface of the cylindrical body.

[0013] According to some embodiments of the present invention, the limiting groove is an annular groove that extends continuously in the circumferential direction along the support shaft, and the limiting protrusion is an annular protrusion that extends continuously in the circumferential direction along the support shaft.

[0014] According to some embodiments of the present invention, the end face of the cylinder facing the first end in the axial direction is used to limit the rotor assembly; and / or, the outer peripheral surface of the cylinder is provided with a limiting portion, and the end face of the limiting portion facing the first end is used to limit the rotor assembly.

[0015] According to some embodiments of this utility model, the thrust member is made of a wear-resistant material.

[0016] According to some embodiments of this utility model, the thrust stop is a single piece.

[0017] According to some embodiments of the present invention, the housing has a receiving cavity, one axial end of the receiving cavity is open and the other axial end has a bottom wall, the bottom wall wraps around the first end, the second end is located on the side of the first end near the axial end of the receiving cavity, the electronic water pump further includes a stator assembly, the housing is injection molded to wrap the stator assembly and the stator assembly is arranged around the receiving cavity, and / or, the electronic water pump further includes an impeller assembly, the impeller assembly is located on the side of the rotor assembly away from the first end, the impeller assembly is connected to the rotor assembly and is rotatable under the drive of the rotor assembly.

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

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

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

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

[0022] Figure 1 This is a partial structural schematic diagram of an electronic water pump according to the first embodiment of the present utility model, wherein the thrust member is an arc-shaped gasket;

[0023] Figure 2 This is a partial structural cross-sectional view of an electronic water pump according to a second embodiment of the present invention, wherein the cylinder is used to limit the rotor assembly;

[0024] Figure 3 This is a partial structural cross-sectional view of an electronic water pump according to the third embodiment of the present utility model, wherein the limiting part on the outer peripheral surface of the cylinder is used to limit the rotor assembly;

[0025] Figure 4 This is a schematic diagram of a vehicle according to an embodiment of the present utility model.

[0026] Figure label:

[0027] Thermal management system 1000; Vehicle 2000; Electric water pump 100;

[0028] Support shaft 10; First end 11; Second end 12; Limiting groove 121;

[0029] Casing 20; Receiving cavity 201; Bottom wall 202;

[0030] Thrust member 30; arc-shaped washer 301; break opening 302; mating hole 303; limiting protrusion 31; limiting part 32; cylinder 33; recess 331. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] The electronic water pump 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0035] Reference Figures 1-3 As shown, the electronic water pump 100 according to an embodiment of the present invention may include: a housing 20, a support shaft 10, a thrust member 30, and a rotor assembly.

[0036] Specifically, the support shaft 10 has a first end 11 and a second end 12 at its two axial ends. The first end 11 is connected to the housing 20, and the outer circumferential surface of the second end 12 is provided with a limiting groove 121. The thrust member 30 is at least partially sleeved on the support shaft 10, and the thrust member 30 includes a limiting protrusion 31 that is embedded in the limiting groove 121. The rotor assembly is located inside the housing 20 and rotatably sleeved on the support shaft 10, and the rotor assembly is located between the first end 11 and the thrust member 30.

[0037] The connection relationship between the first end 11 and the housing 20 is not limited. For example, the first end 11 can be injection molded to the housing 20, or the first end 11 can be connected to the housing 20 by means of snap-fit, fastener connection, etc. Specifically, for example, in some embodiments, the housing 20 is injection molded to the support shaft 10. The housing 20 can be set as an injection molded part. During the injection molding process of the housing 20, the support shaft 10 is placed into the injection mold for casting. The raw material flows to the first end 11 of the support shaft 10 in the injection mold and solidifies, realizing the injection molding connection between the first end 11 and the housing 20, so that the support shaft 10 can be stably installed on the housing 20.

[0038] The thrust member 30 can be entirely sleeved on the support shaft 10 to improve the connection strength between the thrust member 30 and the support shaft 10. The thrust member 30 can also be partially sleeved on the support shaft 10 to facilitate the installation and removal of the thrust member 30 on the support shaft 10.

[0039] The thrust member 30 can take various forms, such as a washer. The thrust member 30 can be a separate component or a single piece. For example, in some embodiments, the thrust member 30 is a separate component to facilitate maintenance or partial replacement, such as replacing the more worn part of the thrust member 30 instead of replacing the entire thrust member 30, which is more economical. In some embodiments, the thrust member 30 is a single piece, which helps reduce the number of required parts. The integrated thrust member 30 can be directly installed on the support shaft 10, simplifying the installation steps, making it easier to install, and increasing its practicality.

[0040] The thrust member 30 can be made of plastic, metal, composite materials, etc. In some embodiments, the thrust member 30 can be made of a wear-resistant material, which can slow down the wear rate of the thrust member 30 and extend its service life. For example, the thrust member 30 can be made of high manganese steel, cast iron chromium alloy, etc.

[0041] The rotor assembly is sleeved on the support shaft 10 and rotatable around the support shaft 10 to realize the liquid pumping function of the electronic water pump 100. The rotor assembly is located between the first end 11 and the thrust member 30, and the thrust member 30 can limit the possible axial movement of the rotor assembly. The reasons for the axial movement of the rotor assembly include, but are not limited to: the impeller assembly of the electronic water pump 100 generating axial force, causing the rotor assembly connected to the impeller assembly to move axially; the rotor assembly rotating at a high speed causing itself to move axially, etc.

[0042] For example, in some embodiments, the rotor assembly includes an inner bushing that is rotatably fitted onto the support shaft 10, and one end of the inner bushing that is axially close to the second end 12 is opposite to the thrust member 30, so that the thrust member 30 can limit the axial movement of the inner bushing, thereby achieving axial limitation of the entire rotor assembly.

[0043] Here, the inner bushing and the thrust member 30 are opposite each other, meaning that their axial projections at least partially overlap. The thrust member 30 can abut against the inner bushing along the axial direction, or the thrust member 30 can be spaced apart from the inner bushing by a small gap along the axial direction; the choice is flexible. In this application, the two opposing parts can be abutted or spaced apart.

[0044] In some related technologies, the thrust washers of electronic water pumps are fixed to the pump cover via injection molding or snap-fit ​​methods. This requires additional injection molding of support pillars on the pump cover to house the thrust washers. These support pillars can interfere with fluid flow within the pump chamber, negatively impacting the pumping function of the electronic water pump. Furthermore, changes in the relative position of the pump cover and the housing, such as during installation where the pump cover shifts or tilts relative to the housing, affect the coaxiality of the thrust washers and support shafts. This causes the thrust washers to deviate in their limiting direction on the rotor assembly, resulting in poor axial movement control of the rotor assembly, affecting stable rotation, and reducing the mating area between the rotor and stator assemblies. For snap-fit ​​methods, a complex snap-fit ​​structure needs to be manufactured on the relatively small thrust washers, increasing both manufacturing difficulty and cost.

[0045] The thrust member 30 of this application is installed on the support shaft 10, eliminating the need for additional injection-molded support columns on the pump cover. This reduces interference with fluid flow within the pump chamber, improves the liquid pumping effect of the electronic water pump 100, and increases the operating efficiency of the electronic water pump 100. Furthermore, the coaxiality of the thrust member 30 and the support shaft 10 is less susceptible to influence from factors such as pump cover swaying, and relative misalignment between the thrust member 30 and the support shaft 10 is less likely. During installation, transportation, and operation of the electronic water pump 100, the coaxiality between the thrust member 30 and the support shaft 10 remains high. The thrust member 30 can axially limit the rotor assembly, and the limiting direction is less prone to misalignment. This provides good limiting effect on the rotor assembly and facilitates continuous limiting, resulting in good limiting stability and stable rotation of the rotor assembly. This also allows for a larger mating area between the rotor assembly and the stator assembly.

[0046] Furthermore, the thrust member 30 of this application is installed on the support shaft 10 through the cooperation of the limiting protrusion 31 and the limiting groove 121, which is relatively convenient for installation. No additional parts or mating structures, such as screws or support columns, are required for installing the thrust member 30. The thrust member 30 can be directly embedded into the limiting groove 121 of the support column, simplifying the installation steps and making it easy to install, thus increasing its practicality. Moreover, the mating structure of the limiting protrusion 31 and the limiting groove 121 has low complexity, simplifying the installation structure of the thrust member 30, resulting in low manufacturing difficulty and cost, and making it easy to implement.

[0047] According to the embodiment of the present invention, the electronic water pump 100 has a thrust member 30 installed on the support shaft 10, which helps to improve the coaxiality between the thrust member 30 and the support shaft 10, making it less likely for the thrust member 30 and the support shaft 10 to be misaligned. This provides a better limiting effect on the rotor assembly. Furthermore, the installation of the thrust member 30 on the support shaft 10 can be achieved through the cooperation of the limiting protrusion 31 and the limiting groove 121, making the installation more convenient. This simplifies the installation structure and steps of the thrust member 30, reduces manufacturing difficulty and cost, and has high practicality.

[0048] In some embodiments of this utility model, such as Figure 1 As shown, the limiting groove 121 is an annular groove that extends continuously along the circumference of the support shaft 10. The thrust member 30 extends along the circumference of the support shaft 10 and has a break opening 302. The break opening 302 extends circumferentially and penetrates the thrust member 30 axially, facilitating the installation of the thrust member 30 on the support shaft 10 or the removal of the thrust member 30 from the support shaft 10. Furthermore, the limiting groove 121 is an annular groove extending circumferentially along the support shaft 10, allowing the thrust member 30 to be installed on or removed from the support shaft 10 regardless of the location of the break opening 302 within the circumferential direction of the support shaft 10. This achieves the cooperation between the limiting protrusion 31 and the limiting groove 121, making the installation and removal of the thrust member 30 from the support shaft 10 more convenient and quick.

[0049] For example, in some embodiments, the thrust member 30 is an elastic element, allowing it to deform elastically under force. Applying force to the thrust member 30 enlarges the break opening 302, facilitating its assembly on the support shaft 10. This makes installation convenient. After installation, the thrust member 30 is fixed to the second end 12 by the cooperation of the limiting protrusion 31 and the limiting groove 121, as well as the elasticity of the thrust member 30 itself, reducing the risk of it falling off and ensuring reliable installation. Similarly, the elastic deformation of the thrust member 30 facilitates its removal from the second end 12, making disassembly convenient. For example, the thrust member 30 can be an elastic retaining spring.

[0050] In some embodiments, such as Figure 1 As shown, both ends of the breakout 302 are provided with mating holes 303, which facilitates the insertion of a positioning tool into the mating holes 303 and the application of force to the thrust member 30 to enlarge the breakout 302, so as to realize the assembly of the thrust member 30 on the support shaft 10 or to remove the thrust member 30 from the support shaft 10, which is convenient for disassembly and assembly.

[0051] In some embodiments, such as Figure 1As shown, the circumferential dimension of the thrust member 30 along the support shaft 10 is smaller than the outer diameter of the bottom wall of the limiting groove 121. The circumferential dimension of the thrust member 30 along the support shaft 10 refers to the distance between the two ends of the break 302. The smaller break 302 on the thrust member 30 results in a larger solid area, which helps to increase the uniformity of force distribution on the thrust member 30, making it less prone to skewing on the support shaft 10 and improving the limiting effect of the thrust member 30 on the rotor assembly. Furthermore, it increases the circumferential dimension of the limiting protrusion 31 on the thrust member 30 to increase the mating area between the limiting protrusion 31 and the limiting groove 121, making it less likely for the thrust member 30 mounted on the support shaft 10 to fall off, improving the connection strength between the thrust member 30 and the support shaft 10, and making the connection between the thrust member 30 and the support shaft 10 more secure and with better coaxiality.

[0052] In some embodiments, such as Figure 1 As shown, the thrust member 30 is an arc-shaped washer 301. The arc-shaped washer 301 includes a limiting protrusion 31 and a limiting portion 32 connected sequentially in a radially outward direction. The end face of the limiting portion 32 facing the first end 11 is used to limit the rotor assembly. The limiting portion 32 can be axially opposite to at least a part of the rotor assembly (such as the inner bushing) to axially limit the rotor assembly, reducing axial movement of the rotor assembly. Furthermore, the cooperation between the limiting protrusion 31 and the limiting groove 121 allows the arc-shaped washer 301 to be stably installed on the support shaft 10, improving the coaxiality of the arc-shaped washer 301 and the support shaft 10 during operation, thus enhancing the limiting effect of the limiting portion 32 on the rotor assembly. Simultaneously, the limiting protrusion 31 and the limiting portion 32 are connected, ensuring good consistency between the installation and limiting functions of the arc-shaped washer 301. For example, the limiting protrusion 31 and the limiting portion 32 can be a single piece or connected by welding or other methods.

[0053] In some embodiments of this utility model, such as Figures 2-3 As shown, the thrust member 30 includes a cylindrical body 33 extending circumferentially along the support shaft 10. A portion of the cylindrical body 33 is deformed inward to form a limiting protrusion 31, and a recess 331 opposite to the limiting protrusion 31 is formed on the outer circumferential surface of the cylindrical body 33. This allows the cylindrical body 33 to be first fitted onto the support shaft 10, and then deformed to form the limiting protrusion 31 that mates with the limiting groove 121. This helps reduce the axial interaction force between the thrust member 30 and the support shaft 10 during installation, facilitating installation, reducing potential axial movement of the support shaft 10, lowering installation costs, and ensuring a tighter connection between the limiting protrusion 31 and the limiting groove 121, thereby improving the connection strength between the thrust member 30 and the support shaft 10.

[0054] A clamping force toward the support shaft 10 can be applied to the outer peripheral surface of the cylinder 33 in the radial direction by means of riveting, clamping, etc., so that the cylinder 33 deforms inward to form a limiting protrusion 31. At the same time, the outer peripheral surface of the cylinder 33 will form a recess 331 that is radially opposite to the limiting protrusion 31 under the influence of the clamping force and the inward deformation of the cylinder 33.

[0055] In some embodiments, the inner diameter of the cylinder 33 can be slightly larger than the outer diameter of the support shaft 10, so that the cylinder 33 can be fitted onto the support shaft 10. Then, the cylinder 33 can be partially deformed by riveting to form a limiting protrusion 31 that is embedded in the limiting groove 121, making installation more convenient.

[0056] In some embodiments, the limiting groove 121 is an annular groove that extends continuously along the circumference of the support shaft 10, and the limiting protrusion 31 is an annular protrusion that extends continuously along the circumference of the support shaft 10, so that the limiting protrusion 31 and the limiting groove 121 are subjected to more uniform force along the circumference, making the thrust member 30 less prone to deflection, which is beneficial to improving the limiting effect of the thrust member 30 on the rotor assembly.

[0057] In some embodiments, such as Figure 2 As shown, the end face of the cylinder 33 facing the first end 11 in the axial direction is used to limit the rotor assembly. The cylinder 33 can be axially opposite to at least part of the rotor assembly to limit the rotor assembly in the axial direction. The structure of the cylinder 33 is relatively simple, the processing difficulty is low, and it is easy to process.

[0058] In some embodiments, such as Figure 3 As shown, the outer circumferential surface of the cylinder 33 is provided with a limiting portion 32, the end face of which faces the first end 11 and is used to limit the rotor assembly. The limiting portion 32 can be axially opposed to at least a portion of the rotor assembly to axially limit the rotor assembly, and the limiting portion 32 can increase the limiting area of ​​the rotor assembly, resulting in a better limiting effect. The limiting portion 32 also helps to reduce the wall thickness of the cylinder 33, making it easier to deform the cylinder 33 to form the limiting protrusion 31, and facilitating the installation of the thrust member 30 on the support shaft 10.

[0059] In some embodiments of the present invention, the housing 20 has a receiving cavity 201, one axial end of the receiving cavity 201 is open and the other axial end has a bottom wall 202, the bottom wall 202 wraps around the first end 11, and the second end 12 is located on the side of the first end 11 near the axial end of the receiving cavity 201.

[0060] Enclosing the first end 11 within the bottom wall 202 provides a better seal for the first end 11, making it less likely for external liquids and impurities to seep into the receiving cavity 201 through the connection gap between the first end 11 and the housing 20. This helps reduce external erosion damage to the rotor assembly and provides better protection for the electronic water pump 100. Furthermore, the connection between the first end 11 and the housing 20 is more secure because liquids and impurities are less likely to enter the connection gap.

[0061] The second end 12 is located on one side of the first end 11 near the axial end of the receiving cavity 201, that is, the second end 12 is located at the open end of the receiving cavity 201, which facilitates the installation of the thrust member 30 on the second end 12 at the open end, making operation convenient.

[0062] In some embodiments, the electric water pump 100 further includes a stator assembly, with the housing 20 injection-molded to enclose the stator assembly and the stator assembly disposed around the receiving cavity 201. For example, the housing 20 can be integrally injection-molded and assembled with the stator assembly, which simplifies the assembly process and makes the installation of the stator assembly within the housing 20 more secure, thereby improving the working stability of the stator assembly.

[0063] In some embodiments of this utility model, the electronic water pump 100 further includes an impeller assembly located on the side of the rotor assembly away from the first end 11. The impeller assembly is connected to the rotor assembly and can rotate under the drive of the rotor assembly. When the impeller assembly rotates, it is prone to generating axial force and axial movement, which in turn causes axial movement of the rotor assembly connected to the impeller assembly. However, by using the thrust member 30 to axially limit the rotor assembly, the impeller assembly can be axially limited, reducing the axial movement of the impeller assembly and the rotor assembly, and thus improving the working stability of the electronic water pump 100.

[0064] The following describes in detail an electronic water pump 100 according to a specific embodiment of the present invention with reference to the accompanying drawings. It is to be understood that the following description is merely illustrative and should not be construed as limiting the present invention.

[0065] like Figure 1As 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, a rotor assembly, an impeller assembly, a support shaft 10, and a thrust member 30. The housing 20 has a receiving cavity 201, and the pump cover has a pump cavity and seals the end opening of the receiving cavity 201. The housing 20 is an injection molded body, and the stator assembly and the first end 11 of the support shaft 10 are injection molded together. The stator assembly is arranged around the receiving cavity 201, and the first end 11 is injection molded to the end wall of the axially lower end of the receiving cavity 201. The second end 12 of the support shaft 10 is located inside the receiving cavity 201, and the outer peripheral surface of the second end 12 is provided with a limiting groove 121. The thrust member 30 includes a limiting protrusion 31 embedded in the limiting groove 121. The rotor assembly is located between the first end 11 and the thrust member 30 and is rotatably sleeved on the support shaft 10.

[0066] The impeller assembly is located inside the pump chamber and connected to the rotor assembly. Driven by the rotor assembly, the impeller assembly rotates to pump the liquid within the pump chamber. The impeller assembly may experience axial movement due to the impact of the fluid in the pump chamber, potentially causing it to collide with the pump casing. The thrust member 30 restricts the axial movement of the rotor assembly and impeller assembly, reducing wear and vibration caused by the impact between the pump casing and the impeller assembly. This results in more stable rotation of the rotor assembly and impeller assembly, extending the service life of the electronic water pump 100 and improving its operating efficiency.

[0067] The limiting groove 121 is an annular groove that extends continuously along the circumference of the support shaft 10. The thrust member 30 extends along the circumference of the support shaft 10 and has a break 302. The thrust member 30 is an arc-shaped washer 301 and includes a limiting protrusion 31 and a limiting portion 32 connected in sequence along the radial direction. The circumferential dimension of the thrust member 30 along the support shaft 10 is smaller than the outer diameter of the bottom wall of the limiting groove 121. The circumferential break 302 of the arc-shaped washer 301 facilitates the installation and removal of the arc-shaped washer 301 on the support shaft 10, and the arc-shaped washer 301 is not easy to fall off the support shaft 10, making the installation more secure.

[0068] like Figure 2 As shown, the electronic water pump 100 according to the second embodiment of this utility model differs from the electronic water pump 100 of the first embodiment in that the thrust member 30 is a cylindrical body 33 extending circumferentially along the support shaft 10. The wall thickness of the cylindrical body 33 is relatively thick, and the end face area of ​​the cylindrical body 33 facing the first end 11 in the axial direction is large enough to meet the requirements for limiting the rotor assembly. During the installation of the cylindrical body 33 on the support shaft 10, the cylindrical body 33 is first fitted onto the outer circumference of the support shaft 10, and then the outer circumferential surface of the cylindrical body 33 is riveted radially inward, causing the cylindrical body 33 to deform inward to form a limiting protrusion 31 to cooperate with the limiting groove 121. This facilitates the installation of the thrust member 30 on the support shaft 10, reduces installation costs, and provides high connection strength. Furthermore, the structure of the cylindrical body 33 is relatively simple and easy to process.

[0069] like Figure 3 As shown, the electronic water pump 100 according to the third embodiment of this utility model differs from the electronic water pump 100 of the second embodiment in that the thrust member 30 includes a cylindrical body 33 extending circumferentially along the support shaft 10 and a limiting portion 32 provided on the outer circumferential surface of the cylindrical body 33. The end face of the limiting portion 32 facing the first end 11 is used to limit the rotor assembly, which can increase the limiting area of ​​the rotor assembly and improve the limiting effect. Furthermore, it can reduce the wall thickness of the cylindrical body 33, making the process of deforming the cylindrical body 33 to form the limiting protrusion 31 easier, thus facilitating the installation of the thrust member 30 on the support shaft 10.

[0070] like Figure 4 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, by mounting the thrust member 30 on the support shaft 10, facilitates the improvement of the coaxiality between the thrust member 30 and the support shaft 10, making it less likely for the thrust member 30 and the support shaft 10 to misalign, thus providing a better limiting effect on the rotor assembly. Furthermore, the installation of the thrust member 30 on the support shaft 10 can be achieved through the cooperation of the limiting protrusion 31 and the limiting groove 121, making installation relatively convenient. This simplifies the installation structure and steps of the thrust member 30, reduces manufacturing difficulty and cost, and enhances its practicality.

[0071] 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.

[0072] like Figure 4 As 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, by mounting the thrust member 30 on the support shaft 10, facilitates the improvement of the coaxiality between the thrust member 30 and the support shaft 10, making it less prone to relative misalignment between the thrust member 30 and the support shaft 10, providing a better limiting effect on the rotor assembly. Furthermore, the installation of the thrust member 30 on the support shaft 10 can be achieved through the cooperation of the limiting protrusion 31 and the limiting groove 121, making installation relatively convenient. This simplifies the installation structure and steps of the thrust member 30, reduces manufacturing difficulty and cost, and has high practicality.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic water pump characterized by, The electronic water pump comprises: a housing; a support shaft, a first end of which is connected to the housing in an axial direction, and an outer circumferential surface of a second end of the support shaft is provided with a limiting groove; a thrust piece, which is at least partially sleeved on the support shaft, and comprises a limiting protrusion embedded in the limiting groove; a rotor assembly, which is located in the housing and is rotatably sleeved on the support shaft, and is located between the first end and the thrust piece.

2. The electronic water pump of claim 1, wherein, The limiting groove is an annular groove continuously extending in a circumferential direction of the support shaft, and the thrust piece extends in the circumferential direction of the support shaft and has a discontinuous opening.

3. The electronic water pump of claim 2, wherein, A size of the discontinuous opening in the circumferential direction of the support shaft is smaller than an outer diameter of a groove bottom wall of the limiting groove.

4. The electronic water pump of claim 2, wherein, The thrust piece is an arc-shaped gasket, which comprises the limiting protrusion and a limiting portion connected in sequence in a radial direction outward, and an end surface of the limiting portion facing the first end is used for limiting the rotor assembly.

5. The electronic water pump of claim 1, wherein, The thrust piece comprises a cylinder body extending in the circumferential direction of the support shaft, the cylinder body is partially deformed inward to form the limiting protrusion, and a recess opposite to the limiting protrusion is formed on an outer circumferential surface of the cylinder body.

6. The electronic water pump of claim 5, wherein, The limiting groove is an annular groove continuously extending in a circumferential direction of the support shaft, and the limiting protrusion is an annular protrusion continuously extending in the circumferential direction of the support shaft.

7. The electronic water pump according to claim 5, wherein an end surface of the cylinder body facing the first end in an axial direction is used for limiting the rotor assembly; and / or an outer circumferential surface of the cylinder body is provided with a limiting portion, and an end surface of the limiting portion facing the first end is used for limiting the rotor assembly.

8. The electronic water pump of claim 1, wherein, The thrust piece is made of wear-resistant material.

9. The electronic water pump of claim 1, wherein, The thrust piece is an integral piece.

10. The electronic water pump of claim 1, wherein, The housing has a containing cavity, an axial one end of the containing cavity is open, and an axial other end of the containing cavity has a bottom wall, the bottom wall wraps the first end, the second end is located on a side of the first end close to the axial one end of the containing cavity, the electronic water pump further comprises a stator assembly, the housing injection-molds the stator assembly, and the stator assembly is arranged around the containing cavity, and / or the electronic water pump further comprises an impeller assembly, the impeller assembly is located on a side of the rotor assembly away from the first end, the impeller assembly is connected with the rotor assembly and is rotatable under driving of the rotor assembly.

11. A thermal management system, characterized by, The electronic water pump according to any one of claims 1-10.

12. A vehicle characterized by comprising: The thermal management system according to claim 11.

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