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 two axial end parts of the supporting shaft are respectively a first end part and a second end part, and the first end part is connected with the machine shell; the thrust part is an integrated part and is mounted at the second end part; 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 piece is installed on the supporting shaft, the thrust piece and the supporting shaft are not prone to relative deflection, the coaxiality of the thrust piece and the supporting shaft is improved, the limiting effect on the rotor assembly is good, the thrust piece is an integrated piece, the installation steps of the thrust piece are simplified, installation is convenient, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic water pump technical field more particularly, 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 the related art, the thrust washer of the electronic water pump is usually fixed on the pump cover by injection molding, the coaxiality of the thrust washer and the support shaft is difficult to guarantee, the limiting effect on the rotor assembly is poor, and a support column needs to be additionally arranged on the pump cover for mounting the thrust washer, the support column is easy to affect the fluid flow in the pump cavity, and the working efficiency of the electronic water pump is reduced. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art. To this end, one purpose of the utility model is to provide an electronic water pump, which is beneficial to improving the coaxiality of the thrust piece and the support shaft, has a better limiting effect on the rotor assembly, and the mounting structure of the thrust piece is not easy to block the fluid flow of the electronic water pump, so that the working efficiency of the electronic water pump is higher.

[0004] Another purpose of the utility model is to provide a thermal management system with the above-mentioned electronic water pump.

[0005] Another purpose of the utility model is to provide a vehicle with the above-mentioned thermal management system.

[0006] According to the electronic water pump of the utility model embodiment, the thrust piece is installed on the support shaft, so that the thrust piece and the support shaft are not easy to be relatively inclined, which is beneficial to improving the coaxiality of the thrust piece and the support shaft, has a better limiting effect on the rotor assembly, and the thrust piece is a unitary piece, which is beneficial to simplifying the mounting steps of the thrust piece, facilitating installation, and having high practicability.

[0007] According to the electronic water pump of the utility model embodiment, the thrust piece is installed on the support shaft, so that the thrust piece and the support shaft are not easy to be relatively inclined, which is beneficial to improving the coaxiality of the thrust piece and the support shaft, has a better limiting effect on the rotor assembly, and the thrust piece is a unitary piece, which is beneficial to simplifying the mounting steps of the thrust piece, facilitating installation, and having high practicability.

[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 utility model, the thrust piece comprises a sleeve body, the sleeve body has a through hole, and the second end portion is located in the through hole and is welded to the sleeve body.

[0010] According to some embodiments of the present application, the thrust piece is in threaded connection with the second end portion.

[0011] According to some embodiments of the present application, the thrust piece is in interference connection with the second end portion.

[0012] According to some embodiments of the present application, the end face of the second end portion is provided with a mounting hole, the thrust piece comprises a rod body and a limiting portion arranged on the outer circumferential surface of the rod body, the rod body extends into the mounting hole and is connected with the support shaft, the limiting portion is opposite to the end face of the second end portion, and the limiting portion at least partially extends outwardly along the radial direction beyond the outer circumferential surface of the second end portion, and the extending portion of the limiting portion is used for limiting the rotor assembly.

[0013] According to some embodiments of the present application, the extending portion of the limiting portion is an annular protrusion continuously extending along the circumferential direction of the support shaft.

[0014] According to some embodiments of the present application, the thrust piece comprises a sleeve body, the sleeve body is sleeved on the second end portion and connected with the second end portion, and the end face of the sleeve body towards the first end portion is used for limiting the rotor assembly.

[0015] According to some embodiments of the present application, the outer circumferential surface of the support shaft comprises a limiting face extending perpendicularly to the axial direction of the support shaft and located on the side of the second end portion close to the first end portion, and the sleeve body abuts against the limiting face; and / or, the thrust piece further comprises a limiting plate connected with the inner circumferential surface of the sleeve body, and the limiting plate abuts against the end face of the second end portion.

[0016] According to some embodiments of the present application, the casing has a containing cavity, one axial end of the containing cavity is open and the other axial end has a bottom wall, the bottom wall wraps the first end portion, the second end portion is located on the side of the first end portion close to the one axial end of the containing cavity, the electronic water pump further comprises a stator assembly, the casing 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 the side of the rotor assembly away from the first end portion, the impeller assembly is connected with the rotor assembly and can rotate under the driving of the rotor assembly.

[0017] According to some embodiments of the present application, the casing has a containing cavity, one axial end of the containing cavity is open and the other axial end has a bottom wall, the first end portion is arranged through the bottom wall and at least partially exposed.

[0018] According to some embodiments of the present application, the end face of the first end portion is provided with a positioning hole, and the positioning hole is a blind hole.

[0019] According to some embodiments of the present invention, the first end is sealed to the bottom wall with sealant; and / or, the bottom wall covers the end face of the first end and at least a portion of the inner circumferential surface of the positioning hole, and the bottom surface of the positioning hole is at least partially exposed.

[0020] 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.

[0021] The vehicle according to an embodiment of the present invention includes a thermal management system according to an embodiment of the present invention.

[0022] 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

[0023] 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:

[0024] Figure 1 This is a cross-sectional view of an electronic water pump according to the first embodiment of the present invention, wherein the thrust member is welded to the support shaft;

[0025] Figure 2 This is a cross-sectional view of an electronic water pump according to the second embodiment of the present utility model, wherein the external thread of the thrust member is threadedly connected to the internal thread of the support shaft;

[0026] Figure 3 This is a cross-sectional view of an electronic water pump according to the third embodiment of the present utility model, wherein the internal thread of the thrust member is threadedly connected to the external thread of the support shaft.

[0027] Figure 4 This is a cross-sectional view of an electronic water pump according to the fourth embodiment of the present utility model, wherein the thrust member is interference-fitted with the support shaft and the sleeve abuts against the limiting surface;

[0028] Figure 5 This is a cross-sectional view of an electronic water pump according to the fifth embodiment of the present invention, wherein the thrust member is interference-fitted with the support shaft and the bottom wall of the receiving cavity covers the first end.

[0029] Figure 6 This is a cross-sectional view of an electronic water pump according to the sixth embodiment of the present utility model, wherein the thrust member is interference-fitted with the support shaft, and the first end is inserted through the bottom wall of the receiving cavity and is at least partially exposed.

[0030] Figure 7 This is a schematic diagram of a vehicle according to an embodiment of the present utility model.

[0031] Figure label:

[0032] Thermal management system 1000; Vehicles 2000;

[0033] Electric water pump 100; rotor assembly 110; inner shaft sleeve 111; stator assembly 120; impeller assembly 130;

[0034] Support shaft 10; First end 11; Positioning hole 101; Blind hole 102; Second end 12; Mounting hole 121; Limiting surface 13;

[0035] Casing 20; Receiving cavity 201; Bottom wall 202;

[0036] Thrust member 30; sleeve 31; through hole 311; weld 312; rod 32; limiting part 33; extended part 331; limiting plate 34. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] The electronic water pump 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0041] Reference Figures 1-6 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 110.

[0042] Specifically, the axial ends of the support shaft 10 are a first end 11 and a second end 12, respectively, with the first end 11 connected to the housing 20. The thrust member 30 is a single piece and is mounted on the second end 12. The rotor assembly 110 is located inside the housing 20 and rotatably sleeved on the support shaft 10, with the rotor assembly 110 positioned between the first end 11 and the thrust member 30.

[0043] 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.

[0044] The thrust member 30 can be installed on the second end 12 by means of welding, threaded connection, interference fit, etc. The installation method of the thrust member 30 is relatively flexible.

[0045] The thrust member 30 is a single piece, meaning it is an integral unit and its structure is not detachable. For example, the thrust member 30 can be manufactured through a single process (such as injection molding, casting, sheet metal work, etc.), or it can be manufactured into an inseparable unit through multiple processes. For instance, a metal cylinder can be cast from metal material and then encapsulated in plastic material to form the thrust member 30. The thrust member 30 can take various forms; for example, it can be a gasket.

[0046] 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.

[0047] The rotor assembly 110 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 110 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 110.

[0048] The reasons for axial movement of rotor assembly 110 include, but are not limited to: axial force generated at impeller assembly 130 of electric water pump 100 causing rotor assembly 110 to move axially, and high rotation speed of rotor assembly 110 causing it to move axially, etc.

[0049] For example, in some embodiments, such as Figure 1 As shown, the rotor assembly 110 includes an inner bushing 111, which is rotatably fitted onto the support shaft 10. The end of the inner bushing 111 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 111, thereby achieving axial limitation of the entire rotor assembly 110.

[0050] Here, the inner bushing 111 is opposite to the thrust member 30, meaning that the axial projections of the inner bushing 111 and the thrust member 30 at least partially overlap. The thrust member 30 can abut against the inner bushing 111 axially, or the thrust member 30 can be spaced apart from the inner bushing 111 axially by a small gap; the choice is flexible. In this application, the two opposing parts can be either abutted or spaced apart.

[0051] In some related technologies, the thrust washers of electronic water pumps are fixed to the pump cover by injection molding. This requires additional injection molding of support columns on the pump cover to house the thrust washers. The support columns can interfere with the fluid flow in the pump chamber, adversely affecting the liquid pumping function of the electronic water pump. Furthermore, when the relative position of the pump cover and the housing changes, such as when the pump cover shifts or tilts relative to the housing during installation, it affects the coaxiality of the thrust washers and the support shaft. This causes the limiting direction of the thrust washers on the rotor assembly to deviate, resulting in poor limiting effect on the rotor assembly, affecting the stable rotation of the rotor assembly, and reducing the mating area between the rotor assembly and the stator assembly.

[0052] The thrust member 30 of this application is a single piece and is installed on the support shaft 10. No additional parts or mating structures, such as screws or support columns, are needed for installing the thrust member 30. The integrated thrust member 30 can be directly installed on the support shaft 10, simplifying the installation process and making it more practical. Furthermore, the elimination of the need for additional support columns on the pump cover reduces interference with fluid flow within the electronic water pump 100, improving the liquid pumping effect and increasing the operating efficiency of the electronic water pump 100.

[0053] Furthermore, the coaxiality of the thrust member 30 and the support shaft 10 is not easily affected by other factors such as pump cover shaking, and the thrust member 30 and the support shaft 10 are not prone to relative misalignment. During the installation, transportation, and operation of the electronic water pump 100, the coaxiality of the thrust member 30 and the support shaft 10 is relatively high. The thrust member 30 can limit the rotor assembly 110 along the axial direction and the limiting direction is not prone to misalignment. The limiting effect of the rotor assembly 110 is good and it is easy to continuously limit the rotor assembly 110. The limiting stability is good, which makes it easy to achieve stable rotation of the rotor assembly 110 and make the mating area between the rotor assembly 110 and the stator assembly 120 larger.

[0054] 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 makes it less likely for the thrust member 30 and the support shaft 10 to be misaligned. This improves the coaxiality of the thrust member 30 and the support shaft 10, provides a better limiting effect on the rotor assembly 110, and the thrust member 30 is an integral piece, which simplifies the installation steps of the thrust member 30, makes it easy to install, and has high practicality.

[0055] In some related technologies, the thrust washer is fixed to the pump cover by a snap-fit ​​method, which requires manufacturing a relatively complex snap-fit ​​structure on the small thrust washer, resulting in high manufacturing difficulty and cost. However, the installation structure of the thrust member 30 in this application is relatively simple, eliminating the need for a complex snap-fit ​​structure, thus reducing the manufacturing difficulty and cost of the thrust member 30 and making it more practical.

[0056] For example, in some embodiments of this utility model, such as Figure 1 As shown, the thrust member 30 includes a sleeve 31 with a through hole 311. The second end 12 is located inside the through hole 311 and is welded to the sleeve 31. The end face of the second end 12 can be higher than the through hole 311 or located inside the through hole 311, so as to facilitate the welding operation between the second end 12 and the sleeve 31.

[0057] The thrust member 30 is fixedly installed on the second end 12 by welding, making it difficult for the two to separate. The connection is relatively strong, and the installation of the thrust member 30 on the second end 12 can be achieved by welding only the second end 12 and the sleeve 31. This simplifies the structure and operation steps of the thrust member 30, reduces the manufacturing difficulty and cost of the thrust member 30, and is easy to implement.

[0058] For example, in some specific embodiments, such as Figure 1 As shown, the thrust member 30 is welded to the outer peripheral surface of the second end 12 to form a weld seam 312, thereby achieving the welding of the thrust member 30 and the second end 12.

[0059] In some embodiments of this utility model, such as Figures 2-4As shown, the thrust member 30 is threadedly connected to the second end 12. The threaded connection securely mounts the thrust member 30 to the second end 12, making it difficult for the two to separate. The connection is relatively strong, with good coaxiality, and the installation structure is relatively simple and easy to manufacture. The installation of the thrust member 30 at the second end 12 can be achieved simply by turning the thread on either the thrust member 30 or the second end 12, which simplifies the operation steps and makes it easy to implement.

[0060] This application does not limit the shape, direction of rotation, or size of the thread in the threaded connection. For example, the thread can be a triangular thread, a rectangular thread, a circular arc thread, a trapezoidal thread, etc., and the thread can be a left-hand thread, a right-hand thread, etc., as long as the thrust member 30 is firmly connected to the second end 12, the selection is relatively flexible.

[0061] In some embodiments of this utility model, such as Figures 5-6 As shown, the thrust member 30 is interference-fitted to the second end 12. The interference fit securely mounts the thrust member 30 to the second end 12, making it difficult for the two to separate. The connection is relatively strong, and the installation structure is relatively simple and easy to manufacture. The thrust member 30 can be installed at the second end 12 simply by interference fitting it to the support shaft 10. This simplifies the operation steps, reduces processing costs, and is easy to implement.

[0062] The cross-section of the connection between the thrust member 30 and the second end 12 can be circular or non-circular, such as a flat rectangle. Alternatively, the thrust member 30 and the second end 12 can be interference-fitted through a spline structure or the like. The interference amount between the thrust member 30 and the second end 12 can be determined according to the actual situation, such as the material of the thrust member 30, the material of the support shaft 10, and the size of the support shaft 10. It can be used for various electronic water pumps 100 of different materials and sizes, and has a wide range of applications.

[0063] In some embodiments, such as Figure 2 As shown, the end face of the second end 12 (i.e. the end face facing away from the first end 11) is provided with a mounting hole 121. The thrust member 30 includes a rod body 32 and a limiting part 33 provided on the outer peripheral surface of the rod body 32. The rod body 32 extends into the mounting hole 121 and is connected to the support shaft 10. The limiting part 33 is opposite to the end face of the second end 12, and the limiting part 33 extends radially outward beyond the outer peripheral surface of the second end 12. The extended part 331 of the limiting part 33 is used to limit the rotor assembly 110.

[0064] The connection between the rod 32 and the support shaft 10 can be a threaded connection, an interference fit, etc., allowing for flexible selection and ensuring a relatively secure connection. For example, in some embodiments, such as... Figure 2As shown, the outer circumferential surface of the rod 32 is provided with an external thread, and the wall surface of the mounting hole 121 is provided with an internal thread that matches the external thread of the rod 32. The rod 32 is screwed into the mounting hole 121 through the cooperation of the external thread and the internal thread, thereby realizing the connection between the thrust member 30 and the support shaft 10.

[0065] For example, in some embodiments, the rod 32 is cylindrical and its outer diameter is slightly larger than the inner diameter of the mounting hole 121. Pressing the rod 32 into the mounting hole 121 achieves an interference fit between the thrust member 30 and the support shaft 10. The difference between the outer diameter of the rod 32 and the inner diameter of the mounting hole 121 is the interference amount of the interference fit between the rod 32 and the support shaft 10. Adjusting the interference amount can adjust the strength of the interference fit between the thrust member 30 and the support shaft 10; for example, increasing the interference amount makes the connection between the thrust member 30 and the support shaft 10 more secure. Based on the principle of thermal expansion and contraction, when installing the rod 32 and the support shaft 10, the outer diameter of the rod 32 can be reduced or the inner diameter of the mounting hole 121 increased, allowing the rod 32 to be installed more smoothly in the mounting hole 121.

[0066] The limiting portion 33 can abut against the end face of the second end 12 or be spaced apart from the end face of the second end 12 axially by a small gap, so as to limit the relative position of the thrust member 30 and the support shaft 10. For example, in some embodiments, such as Figure 2 As shown, the limiting part 33 abuts against the end face of the second end 12, making it difficult for the thrust member 30 and the support shaft 10 to move relative to each other, making the connection more secure, which helps to improve the coaxiality of the thrust member 30 and the support shaft 10 during operation and improves the limiting effect of the thrust member 30 on the rotor assembly 110.

[0067] The extended portion 331 of the limiting part 33 can be axially opposed to at least a portion of the rotor assembly 110 (such as the inner bushing 111) to axially limit the rotor assembly 110 and reduce axial movement of the rotor assembly 110. Furthermore, the secure mounting of the rod 32 on the support shaft 10 improves the coaxiality of the thrust member 30 and the support shaft 10 during operation, resulting in a better limiting effect of the extended portion 331 of the limiting part 33 on the rotor assembly 110.

[0068] The extended portion 331 of the limiting part 33 can extend circumferentially along the support shaft 10 into a ring structure, an arc structure, an irregular shape structure, etc., to axially limit the rotor assembly 110. For example, in some embodiments, such as Figure 2As shown, the extended portion 331 of the limiting part 33 is an annular protrusion that extends continuously along the circumference of the support shaft 10. This increases the relative area between the limiting part 33 and the rotor assembly 110 along the axial direction, resulting in a better limiting effect on the rotor assembly 110. Furthermore, the limiting effect of the extended portion 331 of the limiting part 33 on each part of the rotor assembly 110 is more uniform along the circumference of the support shaft 10, making it less likely for the rotor assembly 110 to deviate during the limiting process and improving the overall limiting effect of the thrust member 30 on the rotor assembly 110.

[0069] In some embodiments of this utility model, such as Figure 3 As shown, the thrust member 30 includes a sleeve 31, which is sleeved on and connected to the second end 12. The end face of the sleeve 31 facing the first end 11 is used to limit the rotor assembly 110.

[0070] The connection between the sleeve 31 and the second end 12 can be a threaded connection, an interference fit, etc., allowing for flexible selection and ensuring a relatively secure connection. For example, in some embodiments, such as... Figure 3 As shown, the inner circumferential surface of the sleeve 31 is provided with an internal thread and the outer circumferential surface of the second end 12 is provided with an external thread that mates with the internal thread of the sleeve 31. The second end 12 is screwed into the sleeve 31 through the mating of the external thread and the internal thread, thereby realizing the connection between the thrust member 30 and the support shaft 10.

[0071] For example, in some embodiments, the inner diameter of the sleeve 31 is smaller than the outer diameter of the second end 12. The sleeve 31 is fitted onto the outer circumference of the second end 12 to connect the thrust member 30 and the support shaft 10. The difference between the inner diameter of the sleeve 31 and the outer diameter of the second end 12 is the interference fit between the sleeve 31 and the second end 12. Based on the principle of thermal expansion and contraction, when installing the sleeve 31 and the second end 12, the outer diameter of the second end 12 can be reduced or the inner diameter of the sleeve 31 can be increased to allow the sleeve 31 to be fitted onto the second end 12 more smoothly.

[0072] The end face of the sleeve 31 facing the first end 11 can be axially opposed to at least a portion of the rotor assembly 110 to axially limit the rotor assembly 110 and reduce axial movement of the rotor assembly 110. Furthermore, the secure mounting of the sleeve 31 on the support shaft 10 improves the coaxiality of the thrust member 30 and the support shaft 10 during operation, resulting in a better limiting effect of the end face of the sleeve 31 facing the first end 11 on the rotor assembly 110.

[0073] In some embodiments, such as Figure 4As shown, the outer peripheral surface of the support shaft 10 includes a limiting surface 13. The limiting surface 13 extends perpendicularly to the axial direction of the support shaft 10 and is located on the side of the second end 12 near the first end 11. The sleeve 31 abuts against the limiting surface 13. The limiting surface 13 can limit the end face of the sleeve 31 facing the first end 11. During the installation of the sleeve 31, when the end face of the sleeve 31 facing the first end 11 abuts against the limiting surface 13, it indicates that the sleeve 31 is installed in place on the support shaft 10, which facilitates the installation of the sleeve 31 on the support shaft 10 and improves the limiting effect of the sleeve 31 on the rotor assembly 110 during operation. Moreover, the sleeve 31 has a relatively simple structure, low processing difficulty, and is easy to process.

[0074] In this application, "installed in place" can refer to an installation position where the axial distance between the thrust member 30 and the rotor assembly 110 is small. For example, after the thrust member 30 is installed in place, the sleeve 31 and the inner bushing 11 abut against each other or are separated by a small gap along the axial direction, which provides a better axial limiting effect on the rotor assembly 110.

[0075] In some embodiments, such as Figure 3 As shown, the thrust member 30 also includes a limiting plate 34, which is connected to the inner circumferential surface of the sleeve 31 and abuts against the end face of the second end 12. The end face of the second end 12 can limit the end face of the limiting plate 34 facing the support shaft 10. During the installation of the thrust member 30, when the end face of the limiting plate 34 facing the support shaft 10 abuts against the end face of the second end 12, it indicates that the thrust member 30 is installed in place on the support shaft 10, which facilitates the installation of the thrust member 30 on the support shaft 10 and improves the limiting effect of the thrust member 30 on the rotor assembly 110 during operation.

[0076] Meanwhile, the limiting plate 34 is connected to the inner circumferential surface of the sleeve 31, which can improve the overall consistency of the sleeve 31, make the force on both sides of the sleeve 31 along the axial direction of the support shaft 10 more uniform, and make the rotor assembly 110 less prone to deflection during the limiting process, thus improving the overall limiting effect of the thrust member 30 on the rotor assembly 110.

[0077] The limiting plate 34 can be located at the upper end, middle, etc. of the sleeve 31 in the vertical direction. For example, in some embodiments, such as... Figure 3 As shown, the limiting plate 34 is located at the upper end of the sleeve 31, which helps to reduce the volume of the sleeve 31 to reduce the installation space required for the thrust member 30, improve the space compactness, and also helps to reduce the interference of the thrust member 30 on the fluid flow inside the electronic water pump 100.

[0078] In some embodiments of this utility model, such as Figure 5As shown, 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 covers 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.

[0079] 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 110 and other components, provides better protection for the electronic water pump 100, and makes it less likely for liquids and impurities to enter the connection gap between the first end 11 and the housing 20, resulting in a more secure connection between the first end 11 and the housing 20.

[0080] 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.

[0081] In some embodiments, the electric water pump 100 further includes a stator assembly 120, which is injection molded to enclose the stator assembly 120 and is disposed around the receiving cavity 201. For example, the housing 20 can be integrally injection molded and assembled with the stator assembly 120, which simplifies the assembly process and makes the installation of the stator assembly 120 within the housing 20 more secure, thereby improving the working stability of the stator assembly 120.

[0082] In some embodiments of this utility model, such as Figure 6 As shown, the housing 20 has a receiving cavity 201, which is open at one axial end and has a bottom wall 202 at the other axial end. A first end 11 passes through the bottom wall 202 and is at least partially exposed. The exposed portion of the first end 11 can be used to position the support shaft 10, which helps to fix the position of the support shaft 10 in the housing 20, reduces the possibility of the support shaft 10 shifting downward or tilting relative to the housing 20, and improves the reliability of the connection between the support shaft 10 and the housing 20. Furthermore, the first end 11 can be directly pressed against to position the support shaft 10, which can reduce the possibility of the support shaft 10 shifting downward and damaging the housing 20, thus protecting the housing 20.

[0083] For example, by using a positioning fixture to hold the exposed portion of the first end 11 in place, the potential axial movement and radial tilting of the support shaft 10 can be overcome, reducing the relative movement of the support shaft 10 relative to the housing 20 and improving the coaxiality between the support shaft 10 and the housing 20. Reasons for the downward movement or tilting of the support shaft 10 relative to the housing 20 include, but are not limited to: the support shaft 10 moving under force when the thrust member 30 is installed, and the axial movement of the rotor assembly 110 causing the support shaft 10 to move axially, etc.

[0084] In some embodiments, the housing 20 is injection molded to the support shaft 10. When the housing 20 is injection molded, the exposed part of the first end 11 can be held in place by a positioning fixture, so that the support shaft 10 is not easy to move in the injection mold, thereby positioning the position of the support shaft 10 relative to the housing 20, improving the injection molding accuracy of the housing 20 and the coaxiality of the support shaft 10 and the housing 20.

[0085] In some embodiments, the thrust member 30 is interference-fitted with the second end 12. During the process of pressing the thrust member 30 downward toward the second end 12 to achieve the interference fit, the support shaft 10 is subjected to a downward impact force and is prone to downward movement or uneven force distribution, resulting in tilting. However, at least a portion of the first end 11 is exposed outside the housing 20. By using a positioning fixture to push the exposed portion of the first end 11 upward, the downward pressure on the support shaft 10 can be overcome and the force on the support shaft 10 can be made uniform. This can reduce the downward movement and tilting of the support shaft 10, making the positioning of the support shaft 10 more reliable and reducing the risk of the support shaft 10 moving downward and damaging the housing 20, thus protecting the housing 20.

[0086] In some embodiments, such as Figure 6 As shown, the end face of the first end 11 is provided with a positioning hole 101, which is a blind hole 102, that is, a non-through hole with a bottom surface. The blind hole 102 allows for simultaneous positioning of the support shaft 10 along both the axial and radial directions, resulting in better positioning. For example, inserting a positioning fixture into the blind hole 102 and pressing it against the inner circumferential surface and bottom surface of the blind hole 102 can achieve more precise positioning of the support shaft 10.

[0087] In some embodiments, such as Figure 6 As shown, the first end 11 and the bottom wall 202 are sealed with sealant, so that external liquids, impurities, etc. are not easy to seep into the receiving cavity 201 through the connection gap between the first end 11 and the housing 20, which helps to protect the electronic water pump 100.

[0088] In some embodiments, the bottom wall 202 covers the end face of the first end 11 and at least part of the inner circumferential surface of the positioning hole 101, and at least part of the bottom surface of the positioning hole 101 is exposed. This can increase the area of ​​the housing 20 covering the first end 11, extend the connection gap between the first end 11 and the housing 20, and make the connection gap more tortuous, so that external liquids, impurities, etc. are less likely to pass through the connection gap between the first end 11 and the housing 20 and seep into the receiving cavity 201, which is beneficial to protecting the electronic water pump 100.

[0089] For example, in some specific embodiments, the bottom wall 202 covers the end face of the first end 11 and part of the inner circumferential surface of the positioning hole 101, and the bottom surface of the positioning hole 101 is completely exposed. This allows for simultaneous positioning using both the inner circumferential surface and the bottom surface of the positioning hole 101, resulting in a stronger positioning effect on the support shaft 10. In some embodiments, the bottom wall 202 covers the end face of the first end 11 and the entire inner circumferential surface of the positioning hole 101, and the bottom surface of the positioning hole 101 is completely exposed. This allows for positioning using the entire bottom surface of the positioning hole 101, resulting in a stronger positioning effect on the support shaft 10 and extending the connection gap between the first end 11 and the housing 20, thus providing a stronger sealing effect on the connection gap between the first end 11 and the housing 20. In some embodiments, the bottom wall 202 covers the end face of the first end 11, the entire inner circumferential surface of the positioning hole 101, and part of the bottom surface of the positioning hole 101, extending the connection gap between the first end 11 and the housing 20, resulting in a stronger sealing effect on the connection gap between the first end 11 and the housing 20.

[0090] All three scenarios described above can achieve a strong positioning effect on the support shaft 10, and also provide a strong sealing effect on the connection gap between the first end 11 and the housing 20. The appropriate scenario can be chosen flexibly according to the requirements.

[0091] In some embodiments of this utility model, such as Figures 1-6 As shown, the electronic water pump 100 also includes an impeller assembly 130, which is located on the side of the rotor assembly 110 away from the first end 11. The impeller assembly 130 is connected to the rotor assembly 110 and can rotate under the drive of the rotor assembly 110. When the impeller assembly 130 rotates, it is prone to generating axial force and axial movement, which in turn causes axial movement of the rotor assembly 110 connected to the impeller assembly 130. However, by using the thrust member 30 to axially limit the rotor assembly 110, the impeller assembly 130 can be axially limited, reducing the axial movement of the impeller assembly 130 and the rotor assembly 110, which is beneficial to improving the working stability of the electronic water pump 100.

[0092] 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.

[0093] 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 120, a rotor assembly 110, an impeller assembly 130, 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 120 and the first end 11 of the support shaft 10 are injection molded together. The stator assembly 120 is arranged around the receiving cavity 201, and the first end 11 is injection molded to the bottom wall 202 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 thrust member 30 is an integral piece and is installed on the second end 12. The rotor assembly 110 is located between the first end 11 and the thrust member 30 and is rotatably sleeved on the support shaft 10.

[0094] The impeller assembly 130 is located inside the pump chamber and connected to the rotor assembly 110. The impeller assembly 130 rotates under the drive of the rotor assembly 110 to pump the liquid in the pump chamber. The impeller assembly 130 may experience axial movement due to the impact of the fluid in the pump chamber, which could cause it to collide with the pump casing. The thrust member 30 restricts the axial movement of the rotor assembly 110 and the impeller assembly 130, reducing wear and sway caused by the collision between the pump casing and the impeller assembly 130. This makes the rotation of the rotor assembly 110 and the impeller assembly 130 more stable, which helps to extend the service life of the electric water pump 100 and improve its working efficiency.

[0095] The thrust member 30 includes a sleeve 31, which is welded to the second end 12. The connection is relatively strong, and the connection between the thrust member 30 and the support shaft 10 can be achieved by welding only. The manufacturing process is relatively simple, the manufacturing cost is low, and it is easy to implement.

[0096] The bottom wall 202 of the axially lower end of the receiving cavity 201 wraps around the first end 11, making it difficult for external impurities to penetrate into the receiving cavity 201, thus providing good sealing.

[0097] 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 end face of the second end 12 is provided with a mounting hole 121, and the thrust member 30 includes a rod 32 and a limiting part 33 provided on the outer peripheral surface of the rod 32. The extended portion 331 of the limiting part 33 is used to limit the rotor assembly 110. The outer peripheral surface of the rod 32 is provided with an external thread, and the wall surface of the mounting hole 121 is provided with an internal thread that matches the external thread of the rod 32. The rod 32 is threadedly connected to the second end 12, and the connection is relatively firm. Moreover, the connection between the thrust member 30 and the support shaft 10 can be achieved simply by screwing the rod 32 into the mounting hole 121 according to the matching of the internal and external threads, which is easy to implement.

[0098] like Figure 3As 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 thrust member 30 includes a sleeve 31 and a limiting plate 34. The inner circumferential surface of the sleeve 31 is provided with an internal thread, and the outer circumferential surface of the second end 12 is provided with an external thread that matches the internal thread of the sleeve 31. The sleeve 31 and the second end 12 are threadedly connected, and the connection is relatively firm. Moreover, the connection between the thrust member 30 and the support shaft 10 can be achieved simply by fitting the sleeve 31 into the outer circumference of the second end 12 according to the matching of the internal thread and the external thread. This is easy to implement.

[0099] The limiting plate 34 is connected to the inner circumferential surface of the sleeve 31. When the end face of the limiting plate 34 facing the support shaft 10 abuts against the end face of the second end 12, it indicates that the thrust member 30 is installed on the support shaft 10, which facilitates the installation of the thrust member 30 on the support shaft 10.

[0100] like Figure 4 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 sleeve 31 is interference-fitted with the second end 12, the connection is relatively firm, and the connection between the thrust member 30 and the support shaft 10 can be achieved simply by pressing the sleeve 31 into the outer periphery of the second end 12, which has a lower manufacturing cost and is easy to implement.

[0101] The outer peripheral surface of the support shaft 10 includes a limiting surface 13. The sleeve 31 abuts against the limiting surface 13. During the installation of the sleeve 31, when the end face of the sleeve 31 facing the first end 11 abuts against the limiting surface 13, it indicates that the thrust member 30 is installed in place on the support shaft 10, which facilitates the installation of the thrust member 30 on the support shaft 10.

[0102] like Figure 5 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 first embodiment in that the sleeve 31 is interference-fitted with the second end 12, the connection is relatively firm, and the connection between the thrust member 30 and the support shaft 10 can be achieved simply by pressing the sleeve 31 into the outer periphery of the second end 12, which has a lower manufacturing cost and is easy to implement.

[0103] It should be noted that the difference between the electronic water pump 100 of the fifth embodiment of this utility model and the electronic water pump 100 of the fourth embodiment is that the outer peripheral surface of the support shaft 10 does not include the limiting surface 13.

[0104] like Figure 6As shown, the electronic water pump 100 according to the sixth embodiment of the present invention differs from the electronic water pump 100 of the fifth embodiment in that the first end 11 passes through the bottom wall 202 and is at least partially exposed. The end face of the first end 11 is provided with a blind hole 102, which can achieve precise positioning of the support shaft 10, making the support shaft 10 less likely to move downward or tilt, and improving the connection reliability between the support shaft 10 and the housing 20.

[0105] like Figure 7 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 to the support shaft 10, makes it less likely for the thrust member 30 and the support shaft 10 to misalign, which is beneficial for improving the coaxiality of the thrust member 30 and the support shaft 10, providing a better limiting effect on the rotor assembly 110. Furthermore, the thrust member 30 is a single piece, which simplifies the installation steps of the thrust member 30, making it easy to install and highly practical.

[0106] 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.

[0107] like Figure 7 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 to the support shaft 10, makes it less likely for the thrust member 30 and the support shaft 10 to misalign, which is beneficial for improving the coaxiality of the thrust member 30 and the support shaft 10, providing a better limiting effect on the rotor assembly 110. Furthermore, the thrust member 30 is a single piece, which simplifies the installation steps of the thrust member 30, making it easy to install and highly practical.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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, axial two ends of the support shaft are respectively a first end and a second end, the first end is connected with the housing; a thrust piece, the thrust piece is an integral piece and is installed on the second end; a rotor assembly, the rotor assembly is located in the housing and is rotatably sleeved on the support shaft, and the rotor assembly is located between the first end and the thrust piece.

2. The electronic water pump of claim 1, wherein, The thrust piece comprises a sleeve body, the sleeve body has a through hole, the second end is located in the through hole and is welded with the sleeve body.

3. The electronic water pump of claim 1, wherein, The thrust piece is threadedly connected with the second end.

4. The electronic water pump of claim 1, wherein, The thrust piece is interference connected with the second end.

5. The electronic water pump according to claim 3 or 4, characterized in that An end surface of the second end is provided with a mounting hole, the thrust piece comprises a rod body and a limiting portion provided on an outer circumferential surface of the rod body, the rod body extends into the mounting hole and is connected with the support shaft, the limiting portion is opposite to the end surface of the second end, and the limiting portion at least partially extends outward along a radial direction and exceeds an outer circumferential surface of the second end, and the exceeding portion of the limiting portion is used for limiting the rotor assembly.

6. The electronic water pump of claim 5, wherein, The exceeding portion of the limiting portion is an annular protrusion which continuously extends along a circumferential direction of the support shaft.

7. The electronic water pump according to claim 3 or 4, characterized in that, The thrust piece comprises a sleeve body, the sleeve body is sleeved on the second end and is connected with the second end, and an end surface of the sleeve body towards the first end is used for limiting the rotor assembly.

8. The electronic water pump according to claim 7, wherein an outer circumferential surface of the support shaft comprises a limiting surface, the limiting surface extends perpendicularly to an axial direction of the support shaft and is located on a side of the second end close to the first end, and the sleeve body abuts against the limiting surface; and / or the thrust piece further comprises a limiting plate, the limiting plate is connected with an inner circumferential surface of the sleeve body, and the limiting plate abuts against the end surface of the second end.

9. 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 the driving of the rotor assembly.

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 first end penetrates through the bottom wall and is at least partially exposed.

11. The electronic water pump of claim 10, wherein, An end surface of the first end is provided with a positioning hole, the positioning hole is a blind hole.

12. The electronic water pump according to claim 11, wherein the first end and the bottom wall are sealed by a sealing glue; and / or the bottom wall wraps an end surface of the first end and at least part of an inner circumferential surface of the positioning hole, and a bottom surface of the positioning hole is at least partially exposed.

13. A thermal management system, characterized by, The electronic water pump comprises the electronic water pump according to any one of claims 1-12.

14. A vehicle characterized by comprising: The thermal management system comprises the electronic water pump according to claim 13.

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