Supporting shaft fixing structure of electronic water pump, electronic water pump, heat management system and vehicle

Abstract

The utility model discloses a supporting shaft fixing structure of an electronic water pump, the electronic water pump, a heat management system and a vehicle. The supporting shaft fixing structure comprises a supporting shaft and a machine shell, the machine shell comprises a mounting part used for mounting the supporting shaft, the supporting shaft comprises a mounting section and a fixing section which are arranged in the axial direction and connected, the mounting section is used for mounting a rotor assembly of the electronic water pump, the fixing section is wrapped by the mounting part, and the mounting section is used for mounting the rotor assembly of the electronic water pump. One of the mounting part and the fixed section is provided with a connecting hole, and the other one of the mounting part and the fixed section is provided with a connecting column connected in the connecting hole. According to the supporting shaft fixing structure of the electronic water pump, the supporting shaft and the installation portion of the machine shell are connected through the connecting column and the connecting hole, the contact area of the supporting shaft and the machine shell is increased, binding force and pulling-out force are increased, the supporting shaft is not prone to rotating or being pulled out, and connection reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps, and more specifically, to a support shaft fixing structure of an electronic water pump, an electronic water pump, a thermal management system and a vehicle. Background Art

[0002] Electronic water pumps are widely used due to their high efficiency and precise control. However, in related technologies, the housing and support shaft of electronic water pumps are typically secured using interference fit or threaded connections. These methods often lack sufficient strength to prevent rotation and shaft pull-off, resulting in low reliability and room for improvement. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a support shaft fixing structure for an electronic water pump, wherein the support shaft fixing structure increases the bonding force and pull-off force between the support shaft and the housing, making the support shaft less likely to rotate or be pulled off.

[0004] The utility model also provides an electronic water pump with the above-mentioned support shaft fixing structure.

[0005] The utility model also provides a thermal management system with the electronic water pump.

[0006] The utility model also provides a vehicle with the above thermal management system.

[0007] According to an embodiment of the utility model, the support shaft fixing structure of the electronic water pump includes: a support shaft and a casing, the casing includes a mounting portion for mounting the support shaft, the support shaft includes a mounting section and a fixing section arranged and connected along the axial direction, the mounting section is used to mount the rotor assembly of the electronic water pump, the mounting portion covers the fixing section, wherein one of the mounting section and the fixing section is provided with a connecting hole, and the other is provided with a connecting column connected to the connecting hole.

[0008] According to the support shaft fixing structure of the electronic water pump in the embodiment of the utility model, the support shaft and the mounting portion of the casing are connected through connecting columns and connecting holes, which increases the contact area between the support shaft and the casing, increases the bonding force and pull-off force, makes the support shaft less likely to rotate or be pulled off, and improves the connection reliability.

[0009] In addition, the support shaft fixing structure of the electronic water pump according to the above embodiment of the utility model may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the connecting hole includes a blind hole, the end opening of which is formed on an end surface of the fixing section away from the mounting section; and / or, the connecting hole includes a through hole, the end openings of which are both formed on the outer peripheral surface of the fixing section.

[0011] According to some embodiments of the present invention, the hole wall surface of the connecting hole is a concave-convex surface, and the column surface of the connecting column is a concave-convex mating surface that matches the hole wall surface of the connecting hole; and / or, the outer surface of the fixing section is a concave-convex surface, and the inner surface of the mounting portion is a concave-convex mating surface that matches the outer surface of the fixing section.

[0012] According to some embodiments of the present invention, the concave-convex surface has a thread groove, and the concave-convex mating surface has a thread protrusion embedded in the thread groove; or, the concave-convex surface has a reticulate groove, and the concave-convex mating surface has a reticulate protrusion embedded in the reticulate groove.

[0013] According to some embodiments of the present invention, at least part of the fixing section has an outer diameter at one end away from the mounting section that is larger than an outer diameter at one end close to the mounting section.

[0014] According to some embodiments of the present invention, the outer diameter of at least part of the fixed section gradually increases in the direction away from the mounting section; or, the fixed section includes multiple cylindrical sections arranged along the axial direction, and the outer diameters of the multiple cylindrical sections increase gradually in the direction away from the mounting section.

[0015] According to some embodiments of the present invention, the fixed section includes a first shaft section and a second shaft section, the first shaft section connects the mounting section and the second shaft section, the first shaft section is a cylindrical section and the outer peripheral surface is a concave-convex surface, and the outer diameter of the second shaft section gradually increases in the direction away from the first shaft section.

[0016] According to some embodiments of the present invention, the housing has an accommodating cavity for accommodating the rotor assembly, and the mounting portion is integrally formed on the bottom wall of the accommodating cavity.

[0017] According to some embodiments of the present invention, the mounting portion is connected to the support shaft by injection molding.

[0018] The electronic water pump according to the embodiment of the present invention includes the support shaft fixing structure of the electronic water pump according to the embodiment of the present invention.

[0019] The thermal management system according to the embodiment of the present invention includes the electronic water pump according to the embodiment of the present invention.

[0020] A vehicle according to an embodiment of the present invention includes a thermal management system according to an embodiment of the present invention.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic structural diagram of a support shaft according to a first embodiment of the present utility model, wherein the connecting hole is a blind hole;

[0024] Figure 2 is a cross-sectional view of the support shaft fixing structure according to the first embodiment of the present utility model, wherein the hole wall surface of the connecting hole is a smooth surface;

[0025] Figure 3 is a cross-sectional view of a support shaft fixing structure according to a second embodiment of the present utility model, wherein the wall surface of the connecting hole is a concave-convex surface;

[0026] Figure 4 is a schematic structural diagram of a support shaft according to a third embodiment of the present utility model, wherein the connecting hole is a through hole;

[0027] Figure 5 is a cross-sectional view of a support shaft fixing structure according to a third embodiment of the present utility model, wherein the wall surface of the connecting hole is a smooth surface;

[0028] Figure 6 is a cross-sectional view of a support shaft fixing structure according to a fourth embodiment of the present utility model, wherein the hole wall surface of the connecting hole is a concave-convex surface;

[0029] Figure 7 is a schematic structural diagram of a support shaft according to a fifth embodiment of the present utility model, wherein the fixed section includes two shaft sections;

[0030] Figure 8 is a cross-sectional view of a support shaft fixing structure according to a fifth embodiment of the present utility model;

[0031] Figure 9 Schematic diagram of a vehicle according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] Thermal management system 1000; vehicle 2000;

[0034] Electronic water pump 100; support shaft fixing structure 110; stator assembly 120;

[0035] Support shaft 10; connecting hole 101; blind hole 102; through hole 103; concave-convex surface 104; mounting section 11; fixing section 12; first shaft section 121; second shaft section 122;

[0036] Housing 20 ; accommodating cavity 201 ; mounting portion 21 ; connecting column 22 . DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0039] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the 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 not being in direct contact but being in contact through another feature between them, the first feature "above", "above" and "above" the second feature include the first feature being directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0040] The support shaft fixing structure 110 of the electronic water pump 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0041] Reference Figure 1 and Figure 2 As shown, the support shaft fixing structure 110 of the electronic water pump 100 according to the embodiment of the present invention may include: a support shaft 10 and a housing 20 .

[0042] Specifically, the housing 20 includes a mounting portion 21 for mounting the support shaft 10. The support shaft 10 comprises a mounting section 11 and a fixed section 12, which are arranged axially and connected to each other, forming the support shaft 10 as a single, integral shaft. The mounting section 11 is used to mount the rotor assembly of the electronic water pump 100, and the mounting portion 21 covers the fixed section 12. One of the mounting portion 21 and the fixed section 12 has a connecting hole 101, and the other has a connecting post 22 that connects to the connecting hole 101.

[0043] In the present application, the connection relationship between the mounting portion 21 and other parts of the housing 20 is not limited. For example, the mounting portion 21 can be integrally formed with other parts of the housing 20, or the mounting portion 21 can be mounted to other parts of the housing 20 by means of a snap connection, a fastener connection, etc. Furthermore, the mounting section 11 and the fixing section 12 can be integrally formed, or they can be formed separately and then connected together by screw connection, a snap connection, etc., all of which are within the scope of protection of the present invention.

[0044] The mounting portion 21 covers the fixing section 12 to secure the fixing section 12 to the mounting portion 21, thereby securing the support shaft 10 to the housing 20. The mounting section 11 is used to mount the rotor assembly of the electronic water pump 100. Specifically, the rotor assembly can be sleeved on the mounting section 11 and rotate around the mounting section 11 to achieve the liquid pumping function of the electronic water pump 100.

[0045] For example, in some specific embodiments. The electronic water pump 100 includes a housing 20, a pump cover, an impeller assembly, a rotor assembly and a stator assembly 120. The housing 20 is cylindrical and formed with a accommodating chamber 201. A pump cover is installed on the housing 20. The pump cover is arranged at the open end of the accommodating chamber 201 and is used to close the accommodating chamber 201. The pump cover defines a pump chamber. The stator assembly 120 is injection molded in the housing 20 and is arranged around the accommodating chamber 201. The support shaft 10 is located in the accommodating chamber 201 and is fixedly mounted on the bottom wall of the accommodating chamber 201. The rotor assembly is located in the accommodating chamber 201 and is rotatably sleeved on the support shaft 10. The impeller assembly is located in the pump chamber and is connected to the rotor assembly and can rotate under the drive of the rotor assembly to realize the pumping function of the liquid in the pump chamber.

[0046] In the related art, the housing 20 and the support shaft 10 are installed and fixed by interference fit, screw connection, etc., and the bonding force is poor. Under some harsh conditions, it is not enough to limit the rotation of the support shaft 10 and prevent the support shaft 10 from being pulled off, resulting in low fixing reliability of the support shaft 10.

[0047] In the present application, one of the mounting portion 21 and the fixing section 12 is provided with a connecting hole 101, and the other of the mounting portion 21 and the fixing section 12 is provided with a connecting post 22 connected to the connecting hole 101. Figures 1-8As shown, the fixing section 12 of the support shaft 10 is provided with a connecting hole 101 , and the mounting portion 21 of the housing 20 is provided with a connecting column 22 . The connecting column 22 is located in the connecting hole 101 and the outer surface of the connecting column 22 is connected to the inner surface of the connecting hole 101 .

[0048] The connecting hole 101 can be a cylindrical hole, a prismatic hole, an elliptical hole or an irregularly shaped cylindrical hole, etc., and the corresponding connecting column 22 can be a cylindrical hole, a prism hole, an elliptical hole or an irregularly shaped column, etc. It only needs to match the shape of the connecting column 22 with the connecting hole 101 to achieve the connection between the outer surface of the connecting column 22 and the inner surface of the connecting hole 101.

[0049] By providing the connecting column 22 and the connecting hole 101, the connection area between the mounting portion 21 and the fixed section 12 includes the sum of the connection area between the outer surface of the fixed section 12 and the mounting portion 21 and the connection area between the outer surface of the connecting column 22 and the connecting hole 101, thereby increasing the total connection area between the support shaft 10 and the housing 20, and increasing the bonding force and pull-off force.

[0050] Furthermore, the extension direction of the connecting column 22 and the connecting hole 101 (i.e., the length direction of the column, for example, the axial direction of the cylindrical connecting column 22) is not restricted by the axial direction of the support shaft 10. The connecting hole 101 can extend along the axial direction of the support shaft 10, perpendicular to the axial direction of the support shaft 10, or tilted relative to the axial direction of the support shaft 10. By adjusting the extension direction of the connecting hole 101 and the connecting column 22, the pull-off force between the support shaft 10 and the housing 20 can be further adjusted. For example, the pull-off force is more effectively increased when the connecting hole 101 extends perpendicular to the axial direction of the support shaft 10.

[0051] In addition, in the embodiment where the connecting hole 101 is provided on the support shaft 10, the support shaft 10 can improve the bonding strength and the pulling-off force between the support shaft 10 and the housing 20 without increasing additional material cost and processing cost, which is conducive to reducing costs.

[0052] According to the support shaft fixing structure 110 of the electronic water pump 100 of the embodiment of the present utility model, the support shaft 10 is connected to the mounting portion 21 of the housing 20 through the connecting column 22 and the connecting hole 101, which increases the contact area between the support shaft 10 and the housing 20, increases the bonding force and the pulling force, makes the support shaft 10 not easy to rotate or be pulled off, and improves the connection reliability.

[0053] In some embodiments, as Figure 1-Figure 3 As shown, the connecting hole 101 includes a blind hole 102, and the end opening of the blind hole 102 is formed on the end surface of the fixing section 12 away from the installation section 11. The blind hole 102 is a non-through hole with one end opening.

[0054] The end opening of the blind hole 102 is formed on the end face of the fixed section 12, so that the blind hole 102 can extend roughly along the axial direction of the fixed section 12, and the extension length of the blind hole 102, that is, the depth of the blind hole 102, can be flexibly set according to the requirements of the bonding force and pull-off force, thereby helping to meet the requirements of anti-rotation and anti-pull-off of the support shaft 10.

[0055] It should be noted that the blind hole 102 can be as follows Figure 2 and Figure 3 The shown extension parallel to the axial direction of the fixing section 12 may also be extended in a curve, a broken line, or be inclined relative to the axial direction of the fixing section 12 .

[0056] In some embodiments, as Figure 4-Figure 6 As shown, the connection hole 101 includes a through hole 103, and the end openings of the through hole 103 are formed on the outer peripheral surface of the fixing section 12. The through hole 103 refers to a through hole with at least two end openings. For example, the through hole 103 can be as shown in FIG. Figure 4-Figure 6 The through hole shown is a cylindrical through hole, and the through hole 103 can also be a three-way hole with three end openings or a multi-way hole with more end openings.

[0057] The end openings of through-holes 103 are both formed on the outer circumferential surface of fixing section 12, so that the through-holes 103 and connecting posts 22 extend generally radially along fixing section 12. This effectively prevents support shaft 10 from being pulled out in the axial direction and also effectively prevents support shaft 10 from rotating. Furthermore, when a certain pull-out force is required, the required diameter of through-holes 103 and the outer diameter of connecting posts 22 can be smaller, thereby reducing the impact on the structural strength of support shaft 10.

[0058] In some embodiments, in order to further improve the bonding strength and pull-off strength between the support shaft 10 and the mounting portion 21, as shown in FIG. Figure 3 and Figure 6 As shown, the hole wall surface of the connecting hole 101 may be a concave-convex surface 104 , and the column surface of the connecting column 22 may be a concave-convex matching surface matching the hole wall surface of the connecting hole 101 .

[0059] The concave-convex mating surface matches the concave-convex surface 104, meaning that the concave-convex mating surface and the concave-convex surface 104 can be in surface-to-surface contact. For example, a concave area on the concave-convex surface 104 corresponds to a convex area on the concave-convex mating surface, and a convex area on the concave-convex surface 104 corresponds to a concave area on the concave-convex mating surface. The convex area is located within the concave area, and the outer surface of the convex area contacts the inner surface of the concave area, thereby increasing the contact area between the connecting column 22 and the connecting hole 101, further improving the bonding strength and pull-off force.

[0060] In some embodiments, in order to further improve the bonding strength and pull-off strength between the support shaft 10 and the mounting portion 21, as shown in FIG. Figures 1-6As shown, the outer surface of the fixing section 12 is a concave-convex surface 104 , and the inner surface of the mounting portion 21 is a concave-convex matching surface that matches the outer surface of the fixing section 12 .

[0061] The concave-convex matching surface and the concave-convex surface 104 form surface-to-surface contact and connection, which can further increase the contact area between the fixing section 12 and the mounting portion 21 , and can also further increase the bonding force and the pull-off force.

[0062] The specific structure of the concave-convex surface 104 and the concave-convex matching surface can be flexibly set. In some embodiments, Figures 1-8 As shown, the concave-convex surface 104 has a thread groove, and the concave-convex matching surface has a thread protrusion embedded in the thread groove.

[0063] For example, the thread groove provided in the connecting hole 101 can be provided on the peripheral wall of the connecting hole 101, extending spirally around the axis of the connecting hole 101. When the threaded protrusion is embedded in the thread groove, the pulling force in the axial direction of the connecting hole 101 can be significantly increased, thereby preventing the connecting column 22 from being dislodged from the connecting hole 101 and improving the bonding force and pulling force between the support shaft 10 and the mounting portion 21. Similarly, when the threaded groove provided on the outer peripheral surface of the fixing section 12 cooperates with the threaded protrusion, it can significantly increase the pulling force in the axial direction of the fixing section 12, thereby improving the effect of preventing the support shaft 10 from being pulled off.

[0064] In some embodiments, the concave-convex surface 104 comprises an anvil groove, and the concave-convex mating surface comprises an anvil protrusion that fits into the anvil groove. Compared to a threaded groove, the anvil groove has a more complex structure. Specifically, the anvil groove can be composed of a combination of intersecting straight grooves or spiral grooves. When the anvil protrusion is embedded in the anvil groove, it can effectively increase not only the axial pullout force of the connecting hole 101 but also the axial rotational resistance of the connecting hole 101, further preventing the support shaft 10 from rotating and being pulled off. Similarly, the anvil grooves provided on the outer circumference of the fixing section 12, when mated with the anvil protrusion, can significantly increase the axial pullout force and circumferential rotational resistance of the fixing section 12, further preventing the support shaft 10 from rotating and being pulled off.

[0065] In some specific embodiments, Figure 1 As shown, the anilox grooves include a first spiral groove and a second spiral groove. The first spiral groove and the second spiral groove have opposite spiral directions in the circumferential direction, so that the first spiral groove and the second spiral groove cooperate in the circumferential direction to effectively prevent the support shaft 10 from rotating. Taking the anilox grooves provided in the connecting hole 101 as an example, from one axial end to the other end of the connecting hole 101, the first spiral groove extends in a clockwise spiral along the circumference of the connecting hole 101, and the second spiral groove extends in a counterclockwise spiral along the circumference of the connecting hole 101.

[0066] In the embodiment where the groove structure including a screw groove, an anilox groove or the like is used to form the concave-convex surface 104 , the cross-sectional shape of the groove structure perpendicular to the extension direction includes but is not limited to a triangle, a rectangle, an arc or the like.

[0067] According to some embodiments of the present invention, Figure 7 and Figure 8 As shown, at least part of the fixing section 12 has an outer diameter at one end away from the mounting section 11 that is larger than an outer diameter at one end close to the mounting section 11 .

[0068] Thus, the outer diameter of the fixing section 12 is partially enlarged, which is similar to setting a boss on the outer circumference of the cylindrical structure. The boss cooperates with the mounting portion 21 to significantly increase the pulling force and prevent the support shaft 10 from being pulled off.

[0069] For example, in some embodiments, Figure 7 and Figure 8 As shown, the outer diameter of at least part of the fixing section 12 gradually increases in the direction away from the installation section 11, so that the fixing section 12 is formed into a frustum structure with a certain taper. The fixing section 12 has a simple structure and is easy to process.

[0070] For another example, in some embodiments, the fixing segment 12 comprises multiple cylindrical segments arranged along the axial direction, with the outer diameters of the multiple cylindrical segments increasing in the direction away from the mounting segment 11. In other words, the outer diameter of each cylindrical segment is equal throughout, while the outer diameters of the multiple cylindrical segments are unequal and increase in the direction away from the mounting segment 11. As a result, for any two connected cylindrical segments, the outer diameter of the fixing segment 12 at the end away from the mounting segment 11 is greater than the outer diameter of the end closer to the mounting segment 11. Furthermore, the connection between the two connected cylindrical segments forms a stepped surface perpendicular to the axial direction of the cylindrical segments, which effectively increases the axial pull-out force.

[0071] In some specific embodiments, Figure 7 and Figure 8 As shown, the fixing section 12 includes a first shaft section 121 and a second shaft section 122. The first shaft section 121 connects the mounting section 11 and the second shaft section 122. The first shaft section 121 is a cylindrical section with a concave-convex surface 104 on its outer circumference. The outer diameter of the second shaft section 122 gradually increases in a direction away from the first shaft section 121.

[0072] Among them, the connection between the concave-convex surface 104 of the first shaft segment 121 and the concave-convex matching surface of the mounting portion 21 can increase the connection area between the support shaft 10 and the mounting portion 21, thereby improving the bonding force; the second shaft segment 122 is located on the side of the first shaft segment 121 away from the mounting segment 11, so that the boss of the second shaft segment 122 cooperates with the mounting portion 21, which can prevent the support shaft 10 from moving from the second shaft segment 122 to the first shaft segment 121 relative to the mounting portion 21, thereby improving the pull-out force between the support shaft 10 and the mounting portion 21.

[0073] Through the synergistic effect of the connection between the concave-convex surface 104 of the first shaft segment 121 and the concave-convex mating surface of the mounting part 21, and the cooperation between the boss of the second shaft segment 122 and the mounting part 21, the bonding force and pull-off force between the support shaft 10 and the mounting part 21 can be more effectively improved, meeting the requirements of limiting the rotation and pulling-off of the support shaft 10 under harsh conditions.

[0074] According to some embodiments of the present invention, Figure 2 As shown, the housing 20 has a housing cavity 201 for accommodating the rotor assembly, and a mounting portion 21 is integrally formed on the bottom wall of the housing cavity 201. The bottom wall of the housing cavity 201 refers to the end wall at one axial end of the housing cavity 201 in the axial direction of the rotor assembly. The mounting portion 21 is integrally formed with the bottom wall of the housing cavity 201, eliminating the need to install the mounting portion 21 with other components of the housing 20 and reducing installation gaps, thereby improving the overall sealing and structural strength of the housing 20.

[0075] In some embodiments, the mounting portion 21 is injection-molded to the support shaft 10. For example, the housing 20 can be configured as an injection-molded body, and the support shaft 10 can be connected to the mounting portion 21 of the housing 20 during the injection molding of the housing 20, allowing the support shaft 10 to be stably mounted on the housing 20. This facilitates the connection of the connecting post 22 within the connecting hole 101, eliminating the need for separate molding and subsequent assembly. Furthermore, the connection between the connecting post 22 and the connecting hole 101, as well as the connection between the mounting portion 21 and the fixing section 12, can be accommodated in more complex shapes, resulting in a more reliable connection.

[0076] For example, Figure 2 and Figure 3 As shown, the connecting hole 101 is a blind hole 102 provided in the fixed section 12 and extends along the axial direction of the fixed section 12. During the process of injection molding the housing 20, the support shaft 10 can be placed in the injection mold and cast. The raw material flows into the blind hole 102 of the support shaft 10 and solidifies to form a connecting column 22, while realizing the connection with the inner surface of the connecting hole 101, and the raw material covers the fixed section 12 of the support shaft 10 to form a mounting portion 21 connected to the connecting column 22.

[0077] For example, Figure 5 and Figure 6 As shown, the connecting hole 101 is a through hole 103 provided in the fixed section 12 and passes through the fixed section 12 radially. During the process of injection molding the housing 20, the support shaft 10 can be placed in the injection mold and cast. The raw material flows into the through hole 103 of the support shaft 10 and solidifies to form a connecting column 22, while realizing the connection with the inner surface of the connecting hole 101, and the raw material covers the fixed section 12 of the support shaft 10 to form a mounting portion 21 connected to the connecting column 22.

[0078] For example, Figure 3 and Figure 6 As shown, in an embodiment where the inner wall surface of the connecting hole 101 and the outer surface of the fixing section 12 include a concave-convex surface 104, the concave-convex mating surface of the mounting portion 21 can be automatically formed into a shape matching the concave-convex surface 104 through injection molding connection, thereby achieving a surface-to-surface fitting connection between the concave-convex surface 104 and the concave-convex mating surface, and the connection process is not restricted by the complex surface structure.

[0079] In addition, during the injection molding process of the casing 20, the connection between the connecting hole 101 and the connecting column 22 can improve the bonding force and pull-out force between the fixing section 12 and the mounting portion 21, thereby preventing the support shaft 10 from rotating or being pulled off in the casing 20, and improving the accuracy of fixing the support shaft 10 in the casing 20 without increasing additional material costs and processing costs.

[0080] The electronic water pump 100 according to the embodiment of the present invention includes the support shaft fixing structure 110 of the electronic water pump 100 according to the embodiment of the present invention. Since the support shaft fixing structure 110 of the electronic water pump 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, according to the electronic water pump 100 according to the embodiment of the present invention, the support shaft 10 is connected to the mounting portion 21 of the housing 20 via the connecting column 22 and the connecting hole 101, thereby increasing the contact area between the support shaft 10 and the housing 20, increasing the bonding force and the pull-off force, making the support shaft 10 less likely to rotate or be pulled off, and improving the connection reliability.

[0081] An electronic water pump 100 according to a specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the following description is merely illustrative and should not be construed as limiting the present invention.

[0082] like Figure 1 and Figure 2 As shown, the electronic water pump 100 according to the first embodiment of the present invention includes a housing 20, a pump cover, a stator assembly 120, a rotor assembly, an impeller assembly and a support shaft 10. The housing 20 has a accommodating chamber 201, and the pump cover has a pump cavity and covers the end opening of the accommodating chamber 201. The housing 20 is an injection molded body and is injection molded to cover the stator assembly 120 and the fixed section 12 of the support shaft 10, wherein the stator assembly 120 is arranged around the accommodating chamber 201, the fixed section 12 of the support shaft 10 is injection molded to the end wall of one axial end of the accommodating chamber 201, and the mounting section 11 of the support shaft 10 is located in the accommodating chamber 201. The rotor assembly is located in the accommodating chamber 201 and is rotatably mounted on the mounting section 11 of the support shaft 10. The impeller assembly is located in the pump cavity and is connected to the rotor assembly. The impeller assembly rotates under the drive of the rotor assembly to achieve pumping of the liquid in the pump cavity.

[0083] The end surface of the fixed section 12 of the support shaft 10 is provided with an axially extending connection hole 101. This connection hole 101 is a smooth-walled blind hole 102, and the outer circumference of the fixed section 12 is provided with a mesh-like groove. During the injection molding of the housing 20, the raw material is inserted into the blind hole 102 to form a connection post 22, which connects to the wall of the connection hole 101. The raw material also wraps around the outer surface of the connection post, creating a larger contact area between the support shaft 10 and the housing 20 and enhancing the bonding strength.

[0084] like Figure 3 As shown, the electronic water pump 100 according to the second embodiment of the present invention is different from the electronic water pump 100 of the first embodiment in that the connection hole 101 of the support shaft 10 is a threaded hole, which can effectively increase the contact area between the support shaft 10 and the housing 20, thereby increasing the bonding force and the pull-off force.

[0085] like Figure 4 and Figure 5 As shown, the electronic water pump 100 according to the third embodiment of the present invention is different from the electronic water pump 100 of the first embodiment in that the connecting hole 101 of the fixed section 12 of the support shaft 10 passes through the fixed section 12 perpendicular to the axial direction, and the raw material entering the connecting hole 101 when the housing 20 is injection molded forms a connecting column 22, which can effectively prevent the support shaft 10 from rotating under force, and can also increase the pull-out force of the shaft.

[0086] like Figure 6 As shown, the electronic water pump 100 according to the fourth embodiment of the present invention is different from the electronic water pump 100 of the third embodiment in that the connection hole 101 of the support shaft 10 is a threaded hole, which can further increase the contact area between the support shaft 10 and the housing 20.

[0087] like Figure 7 and Figure 8 As shown, the electronic water pump 100 according to the fifth embodiment of the present invention is different from the electronic water pump 100 of the first embodiment in that the fixed section 12 includes a first shaft section 121 and a second shaft section 122, the outer circumferential surface of the first shaft section 121 is provided with a mesh groove, and the outer diameter of the second shaft section 122 gradually increases in the direction away from the first shaft section 121 to form a frustum structure, which has a certain taper and can increase the pull-off force.

[0088] like Figure 9As shown, a 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, in the thermal management system 1000 according to an embodiment of the present invention, the support shaft 10 is connected to the mounting portion 21 of the housing 20 via the connecting column 22 and the connecting hole 101. This increases the contact area between the support shaft 10 and the housing 20, increases the bonding force and the pull-off force, and makes the support shaft 10 less likely to rotate or be pulled off, thereby improving connection reliability.

[0089] In some embodiments, the thermal management system 1000 is an important component for regulating the vehicle cabin environment (temperature, humidity, etc.) and the working environment of other components. The thermal management system 1000 mainly includes: valves, heat exchangers, compressors and pumps, such as electronic water pumps 100 or other water pumps. The thermal management system 1000 has a circulating refrigerant, which can be carbon dioxide refrigerant, etc.

[0090] like Figure 9 As shown, vehicle 2000 according to an embodiment of the present invention includes thermal management system 1000 according to an embodiment of the present invention. Because thermal management system 1000 according to an embodiment of the present invention has the aforementioned beneficial technical effects, in vehicle 2000 according to an embodiment of the present invention, support shaft 10 is connected to mounting portion 21 of housing 20 via connecting column 22 and connecting hole 101. This increases the contact area between support shaft 10 and housing 20, enhances both the bonding and pull-off forces, and prevents support shaft 10 from rotating or being pulled off, thereby improving connection reliability.

[0091] Among them, 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 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 use power batteries, hydrogen fuel cells, etc., and there is no special limitation here. It should be noted that this is only an exemplary description of the structure of new energy vehicles, etc., and it does not limit the scope of protection of this utility model.

[0092] Other structures and operations of the electronic water pump 100 , the thermal management system 1000 and the vehicle 2000 according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0093] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0094] Throughout this specification, reference to terms such as "embodiment," "specific embodiment," and "example" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

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

Claims

1. A support shaft fixing structure for an electronic water pump, characterized in that: include: A support shaft and a housing, wherein the housing includes a mounting portion for mounting the support shaft, the support shaft includes a mounting section and a fixed section arranged and connected along the axial direction, the mounting section is used to mount the rotor assembly of the electronic water pump, and the mounting portion covers the fixed section, wherein, One of the mounting portion and the fixing section is provided with a connecting hole, and the other is provided with a connecting column connected to the connecting hole.

2. The support shaft fixing structure of the electronic water pump according to claim 1, characterized in that: The connecting hole comprises a blind hole, and an end opening of the blind hole is formed on an end surface of the fixing section away from the mounting section; and / or, The connecting hole comprises a through hole, and the end openings of the through hole are both formed on the outer peripheral surface of the fixing section.

3. The support shaft fixing structure of the electronic water pump according to claim 1, characterized in that: The wall surface of the connecting hole is a concave-convex surface, and the column surface of the connecting column is a concave-convex matching surface matching the wall surface of the connecting hole; and / or, The outer surface of the fixing section is a concave-convex surface, and the inner surface of the mounting portion is a concave-convex matching surface that matches the outer surface of the fixing section.

4. The support shaft fixing structure of the electronic water pump according to claim 3, characterized in that: The concave-convex surface has a thread groove, and the concave-convex matching surface has a thread protrusion embedded in the thread groove; or, The concave-convex surface has an anilox groove, and the concave-convex matching surface has an anilox protrusion embedded in the anilox groove.

5. The support shaft fixing structure of the electronic water pump according to any one of claims 1 to 4, characterized in that: The outer diameter of at least part of the fixing section at one end away from the installation section is larger than the outer diameter of the end close to the installation section.

6. The support shaft fixing structure of the electronic water pump according to claim 5, characterized in that: The outer diameter of at least part of the fixing section gradually increases in a direction away from the mounting section; or, The fixing section includes a plurality of cylindrical sections arranged along the axial direction, and the outer diameters of the plurality of cylindrical sections increase gradually in a direction away from the mounting section.

7. The support shaft fixing structure of the electronic water pump according to claim 5, characterized in that: The fixed section includes a first shaft section and a second shaft section, the first shaft section connects the mounting section and the second shaft section, the first shaft section is a cylindrical section and the outer peripheral surface is a concave-convex surface, and the outer diameter of the second shaft section gradually increases in the direction away from the first shaft section.

8. The support shaft fixing structure of the electronic water pump according to claim 1, characterized in that: The housing has an accommodating cavity for accommodating the rotor assembly, and the mounting portion is integrally formed on the bottom wall of the accommodating cavity.

9. The support shaft fixing structure of the electronic water pump according to claim 1, characterized in that: The mounting portion is connected to the support shaft by injection molding.

10. An electronic water pump, characterized in that: A support shaft fixing structure comprising the electronic water pump according to any one of claims 1-9.

11. A thermal management system, characterized in that: Comprising the electronic water pump according to claim 10.

12. A vehicle, characterized in that: Comprising the thermal management system of claim 11.

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