Impeller rotor assembly of an electric water pump and electric water pump, thermal management system and vehicle

Abstract

The utility model discloses a kind of impeller rotor assemblies of electronic water pump and electronic water pump, thermal management system and vehicle, the impeller rotor assembly of the electronic water pump includes: rotor body, the rotor body includes rotor core, permanent magnet and first injection body, the permanent magnet is installed in the rotor core, the first injection body injection molding is connected the rotor core with The permanent magnet;Shaft sleeve, the shaft sleeve is integrated and is worn in the rotor body;Second injection body, the second injection body includes the rotor portion and impeller portion connected, the rotor portion injection molding is connected the rotor body with The shaft sleeve.According to the impeller rotor assembly of the utility model embodiment electronic water pump, by making shaft sleeve and impeller portion together plastic, the coaxial degree of shaft sleeve and impeller portion is conveniently controlled, with the advantages such as improving the degree of smoothness of impeller portion operation, improving the performance of electronic water pump.

Description

Technical Field

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

[0002] In related technologies, the impeller rotor's bushing and impeller body are coated twice. The two coatings are positioned differently in the mold, making it difficult to unify the coaxiality of the bushing and impeller body. This affects the smooth operation of the impeller rotor and the working effect of the water pump. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes an impeller rotor assembly for an electronic water pump. By molding the shaft sleeve and the impeller together, the impeller rotor assembly facilitates the control of the coaxiality of the shaft sleeve and the impeller, and has the advantages of improving the smoothness of impeller operation and improving the performance of the electronic water pump.

[0004] This invention also proposes an electronic water pump having the impeller rotor assembly.

[0005] This utility model also proposes a thermal management system having the aforementioned electronic water pump.

[0006] This utility model also proposes a vehicle having the aforementioned thermal management system.

[0007] An impeller rotor assembly of an electronic water pump according to a first aspect embodiment of the present invention includes: a rotor body, the rotor body including a rotor core, a permanent magnet and a first injection molded body, the permanent magnet being mounted on the rotor core, and the first injection molded body injection molding connecting the rotor core and the permanent magnet; a bushing, the bushing being an integral piece and passing through the rotor body; and a second injection molded body, the second injection molded body including a connected rotor portion and an impeller portion, the rotor portion injection molding connecting the rotor body and the bushing.

[0008] The impeller rotor assembly of the electronic water pump according to the present invention, by molding the bushing and the impeller together, facilitates the control of the coaxiality of the bushing and the impeller, and has the advantages of improving the smoothness of the impeller operation and improving the performance of the electronic water pump.

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

[0010] According to some embodiments of the present invention, the rotor core is provided with an axially penetrating mounting groove, the permanent magnet is inserted into the mounting groove, and the rotor core also includes an air groove communicating with the mounting groove, the first injection molded body filling the air groove.

[0011] According to some embodiments of the present invention, at least one of the inner and outer circumferential surfaces of the rotor core is provided with a positioning groove, the positioning groove is exposed outside the first injection molding body, and the second injection molding body wraps the groove wall surface of the positioning groove.

[0012] According to some embodiments of the present invention, the outer peripheral surface of the rotor core is exposed to the first injection molded body, and the second injection molded body wraps around the axial end face and outer peripheral surface of the rotor core.

[0013] According to some embodiments of the present invention, the axial end of the first injection body is provided with a positioning protrusion, and the positioning protrusion is at least partially exposed outside the second injection body for positioning the rotor body during the injection molding of the second injection body.

[0014] According to some optional embodiments of the present invention, the positioning protrusion is provided at one end of the rotor portion facing away from the impeller portion.

[0015] According to some optional embodiments of the present invention, the first injection body is provided with a sealing part, the sealing part extends circumferentially along the positioning protrusion, and the second injection body wraps around the sealing part, wherein the sealing part is a protrusion or a groove.

[0016] According to some embodiments of the present invention, the axial end of the first injection molded body is provided with a positioning through hole, the rotor core and / or the permanent magnet are exposed through the positioning through hole in the first injection molded body, and the second injection molded body wraps the exposed portion of the rotor core and / or the permanent magnet.

[0017] According to some embodiments of the present invention, the axial end of the first injection molded body is provided with a reinforcing portion, the reinforcing portion extends circumferentially along the rotor core, and the second injection molded body wraps around the reinforcing portion.

[0018] According to some embodiments of the present invention, at least a portion of the outer peripheral surface of the bushing is a non-cylindrical surface, the second injection molded body wraps around at least a portion of the outer peripheral surface of the bushing, and the second injection molded body wraps around the non-cylindrical surface.

[0019] According to some embodiments of the present invention, the axial end faces of the bushing are provided with flow channel grooves, and the flow channel grooves are exposed outside the second injection molded body.

[0020] According to some embodiments of the present invention, the impeller portion includes a first cover plate, and the impeller rotor assembly further includes a second cover plate and blades; or, the impeller portion includes a connected first cover plate and blades, and the impeller rotor assembly further includes a second cover plate; or, the impeller portion includes a connected first cover plate, a second cover plate, and blades; wherein, the first cover plate is connected to one axial end of the rotor portion, the second cover plate is located on the side of the first cover plate facing away from the rotor portion, and the blades are connected between the first cover plate and the second cover plate.

[0021] According to some optional embodiments of the present invention, at least one of the first cover plate and the second cover plate is provided with a welding groove, the groove wall of the welding groove is provided with a first welding rib, the blade is provided with a second welding rib, the second welding rib is inserted into the welding groove, the extension directions of the first welding rib and the second welding rib intersect, and at least one of the first cover plate and the second cover plate is welded to the blade through the first welding rib and the second welding rib.

[0022] According to a second aspect of the present invention, an electronic water pump is provided, the electronic water pump including the impeller rotor assembly described in the first aspect of the present invention.

[0023] The electronic water pump according to the embodiments of the present invention utilizes the impeller rotor assembly described in the first aspect of the present invention. By molding the bushing and the impeller together, the coaxiality of the bushing and the impeller can be easily controlled, which has the advantages of improving the smoothness of impeller operation and improving the performance of the electronic water pump.

[0024] A thermal management system is provided according to a third aspect of the present invention, the thermal management system including the electronic water pump described in the second aspect of the present invention.

[0025] The thermal management system according to the embodiments of the present invention utilizes the electronic water pump described in the second aspect of the present invention. By encapsulating the bushing and impeller together, the coaxiality of the bushing and impeller can be easily controlled, which has the advantages of improving the smoothness of impeller operation and improving the performance of the electronic water pump.

[0026] According to a fourth aspect of the present invention, a vehicle is provided, the vehicle including a thermal management system according to a third aspect of the present invention.

[0027] The vehicle according to the present invention utilizes the thermal management system described in the third aspect of the present invention, which, by molding the bushing and impeller together, facilitates the control of the coaxiality of the bushing and impeller, and has advantages such as improving the smoothness of impeller operation and improving the performance of the electric water pump.

[0028] 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

[0029] 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:

[0030] Figure 1 This is a structural cross-sectional view of the rotor body, the second injection molded body, and the bushing in one direction according to an embodiment of the present utility model;

[0031] Figure 2 yes Figure 1 Enlarged view of the central area;

[0032] Figure 3 This is a cross-sectional view of the rotor body, the second injection-molded body, and the bushing in another direction according to an embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of the rotor body in one direction according to an embodiment of the present utility model;

[0034] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0035] Figure 6 This is a schematic diagram of the rotor body in another direction according to an embodiment of the present utility model;

[0036] Figure 7 This is a cross-sectional view of the rotor body according to an embodiment of the present utility model;

[0037] Figure 8 This is a schematic diagram of the rotor core and permanent magnet according to an embodiment of the present utility model;

[0038] Figure 9 This is a structural schematic diagram of the bushing according to an embodiment of the present utility model;

[0039] Figure 10 This is a structural schematic diagram of the second cover plate and the second injection molded body according to an embodiment of the present utility model. The impeller part includes a first cover plate and blades.

[0040] Figure 11 This is a structural cross-sectional view of the impeller rotor assembly according to an embodiment of the present utility model in one direction;

[0041] Figure 12 This is a cross-sectional view of the impeller rotor assembly according to an embodiment of the present utility model in another direction;

[0042] Figure 13 This is a structural cross-sectional view of the second cover plate according to an embodiment of the present utility model;

[0043] Figure 14 This is a schematic diagram of the structure of the second cover plate according to an embodiment of the present utility model;

[0044] Figure 15 This is a structural schematic diagram of the second injection molded body according to an embodiment of the present utility model. The impeller portion includes a first cover plate and blades.

[0045] Figure 16 This is a structural schematic diagram of a vehicle according to an embodiment of the present utility model.

[0046] Reference numerals: 1000, vehicle; 1, impeller rotor assembly;

[0047] 10. Rotor body;

[0048] 11. Rotor core; 111. Mounting slot; 112. Air slot; 113. Positioning groove;

[0049] 12. Permanent magnet;

[0050] 13. First injection molded body; 131. Positioning protrusion; 132. Sealing part; 133. Positioning through hole; 134. Reinforcing part;

[0051] 20. Bushing; 21. Limiting groove; 22. Flow channel groove;

[0052] 30. Second injection molded part; 301. First part; 302. Second part; 303. Third part;

[0053] 31. Rotor section;

[0054] 32. Impeller section;

[0055] 41. First cover plate; 42. Second cover plate; 421. Welding groove; 422. First welding rib; 43. Blade; 431. Second welding rib. Detailed Implementation

[0056] 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.

[0057] The impeller rotor assembly 1 of an electronic water pump according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0058] like Figures 1-8 As shown, the impeller rotor assembly 1 of the electronic water pump according to an embodiment of the present invention includes a rotor body 10, a bushing 20, and a second injection-molded body 30.

[0059] The rotor body 10 includes a rotor core 11, a permanent magnet 12, and a first injection molded body 13. The permanent magnet 12 is mounted on the rotor core 11. The first injection molded body 13 is injection molded to connect the rotor core 11 and the permanent magnet 12. The bushing 20 is an integral piece and passes through the rotor body 10. The second injection molded body 30 includes a connected rotor part 31 and an impeller part 32. The rotor part 31 is injection molded to connect the rotor body 10 and the bushing 20.

[0060] In this way, the bushing 20 is made into a single piece. When the second injection molded part 30 is used to encapsulate the bushing 20, it is easier to reduce the gap between the second injection molded part 30 and the bushing 20, thereby improving the firmness of the connection between the second injection molded part 30 and the bushing 20.

[0061] When the permanent magnet 12 is rotated by the applied force, the permanent magnet 12 can drive the rotor core 11 and the first injection molded body 13 to rotate. The first injection molded body 13 drives the rotor part 31 and the bushing 20 to rotate, which in turn drives the impeller part 32 to rotate. When the impeller part 32 rotates, it can drive the water flow.

[0062] The bushing 20 is used to be fitted onto the mounting shaft of the electric water pump. The mounting shaft is used to limit the position of the bushing 20. Specifically, when the rotor body 10 rotates, it will drive the bushing 20 to rotate relative to the mounting shaft. By limiting the position of the bushing 20, the position of the rotor body 10 and the second injection molded body 30 can be limited, and the swaying amplitude of the rotor body 10 and the second injection molded body 30 can be limited so that the rotor body 10 and the second injection molded body 30 can rotate smoothly, and then the impeller part 32 on the second injection molded body 30 can drive the water flow.

[0063] The bushing 20 provided between the rotor body 10 and the mounting shaft can prevent the rotor body 10 from directly contacting the mounting shaft, thereby reducing wear on the rotor body 10.

[0064] When manufacturing the impeller rotor assembly 1, the rotor core 11 and the permanent magnet 12 are first placed in the first mold, and then the first injection molded body 13 is formed by injection molding. The first injection molded body 13 connects the rotor core 11 and the permanent magnet 12 together. Then the rotor body 10 and the bushing 20 are placed in the second mold, and the second injection molded body 30 is formed by injection molding. The second injection molded body 30 connects the rotor body 10 and the bushing 20 together, and the rotor part 31 on the second injection molded body 30 is formed by injection molding.

[0065] During this process, when the first injection molded body 13 is formed, it is not necessary to place the bushing 20 in the first mold for operation. Instead, the bushing 20 is inserted into the rotor body 10 when the second injection molded body 30 is finally formed. The bushing 20 is inserted into the rotor body 10 and placed in the second mold. This makes it easier to reduce the movement and operation of the bushing 20, thereby reducing the risk of damage to the bushing 20.

[0066] Specifically, the bushing 20 has a relatively brittle structure. Repeatedly placing the bushing 20 in the mold and exposing it to the injection molding liquid increases the risk of cracking and damage. Therefore, this embodiment reduces the number of times the bushing 20 is moved and manipulated, thereby reducing the risk of cracking and damage.

[0067] Furthermore, after placing the bushing 20 in the second mold, a second injection molded body 30 is formed by injection molding, the second injection molded body 30 including the impeller portion 32. That is, during manufacturing, both the bushing 20 and the impeller portion 32 are located within the second mold to encapsulate the bushing 20 and the impeller portion 31 together. This facilitates control over the coaxiality of the bushing 20 and the impeller portion 32, thereby ensuring the smooth operation of the impeller portion 32 and improving the performance of the electric water pump.

[0068] Therefore, the impeller rotor assembly 1 of the electronic water pump according to the present utility model, by molding the bushing 20 and the impeller part 32 together, facilitates the control of the coaxiality of the bushing 20 and the impeller part 32, and has the advantages of improving the smoothness of the impeller part 32 operation and improving the performance of the electronic water pump.

[0069] The impeller rotor assembly 1 of an electronic water pump according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0070] In some specific embodiments of this utility model, such as Figures 1-8 As shown, the impeller rotor assembly 1 of the electronic water pump includes a rotor body 10, a bushing 20, and a second injection-molded body 30.

[0071] In some embodiments of this utility model, the rotor core 11 can be preheated before the first injection molded body 13 is formed, so as to avoid the temperature difference between the rotor core 11 and the injection liquid being too large and affecting the injection molding effect.

[0072] In this application, the first injection-molded body 13 is not connected to the bushing 20. This way, the rotor core 11 is preset so that the bushing 20 does not need to be preheated, thereby reducing the operation of the bushing 20 and making it easier to reduce the risk of the bushing 20 cracking and being damaged.

[0073] In some embodiments of this utility model, such as Figure 8As shown, the rotor core 11 is provided with an axially penetrating mounting groove 111, and the permanent magnet 12 is inserted into the mounting groove 111. The rotor core 11 also includes an air groove 112 that communicates with the mounting groove 111. The first injection molded body 13 fills the air groove 112 so that the first injection molded body 13 itself is a whole. The first injection molded body 13 includes two parts located in the axial direction of the rotor core 11.

[0074] The first injection molded body 13 is filled with air groove 112, which can reduce the risk of injection bulge and improve the injection success rate.

[0075] Specifically, in existing technology, the bushing is coated during the first coating process. When coating the bushing and rotor core, the position of the rotor core needs to be limited by air grooves on the rotor core. After demolding, the high-temperature, high-pressure air generated during the first coating process easily enters the air grooves. During the second coating process, the high-temperature, high-pressure gas generated at the filling end of the mold during the coating process easily enters between the rotor core and the first injection molded body through the air grooves and acts on the first injection molded body. After demolding, without the support of the mold, the high-pressure gas between the rotor core and the first injection molded body may expand, causing the first injection molded body to bulge.

[0076] In this embodiment, the plastic-coated bushing 20 is not required during the first plastic coating. The positioning groove 113 on the inner or outer circumferential surface of the rotor core 11 can be used to limit the position of the rotor core 11. In this way, the air groove 112 is not required during the first plastic coating. The first injection molded body 13 can directly fill the air groove 112, which improves the injection molding yield and reduces the risk of cracking of the rotor core 11 during long-term operation.

[0077] Furthermore, in some embodiments, in order to reduce the radial dimension of the rotor body 10, the outer periphery and inner shaft of the rotor core 11 are exposed to the first injection molded body 13. That is, the first injection molded body 13 only covers the axial ends of the rotor core 11. In other words, the first injection molded body 13 includes two parts located in the axial direction of the rotor core 11, so that the first injection molded body 13 fills the air groove 112, so that the part of the first injection molded body 13 located in the air groove 112 can be connected to the parts of the first injection molded body 13 located at both ends in the axial direction of the rotor core 11, thereby enabling the injection molding of the first injection molded body 13.

[0078] In some embodiments, the mounting groove 111 may be a groove provided on the outer surface of the rotor core 11 or it may be provided inside the rotor core 11, and the circumferential direction of the mounting groove 111 is closed, without much limitation here.

[0079] In some embodiments of this utility model, such as Figure 6 , Figure 8As shown, at least one of the inner and outer peripheral surfaces of the rotor core 11 is provided with a positioning groove 113. The positioning groove 113 is exposed outside the first injection molded body 13 so as to position the rotor core 11 and the permanent magnet 12, thereby forming the first injection molded body 13 connecting the rotor core 11 and the permanent magnet 12.

[0080] The second injection molded body 30 wraps around the groove wall of the positioning groove 113 to increase the mating area between the second injection molded body 30 and the rotor core 11, thereby making the second injection molded body 30 and the rotor core 11 more firmly connected together, avoiding excessive gaps between the second injection molded body 30 and the rotor core 11, which would affect the connection strength between the second injection molded body 30 and the rotor core 11.

[0081] Specifically, before the first injection molded body 13 is formed, the rotor core 11 and the permanent magnet 12 need to be placed in the first mold. The first mold cooperates with the positioning groove 113 on the rotor core 11 to limit the radial direction of the rotor core 11 and limit the rotation of the rotor core 11, so that after the injection liquid is added into the first mold, the first injection molded body 13 connecting the rotor core 11 and the permanent magnet 12 can be formed smoothly.

[0082] In some embodiments, such as Figure 8 As shown, the inner circumferential surface of the rotor core 11 is provided with multiple positioning grooves 113. The multiple positioning grooves 113 are arranged along the circumference of the rotor core 11. The positioning grooves 113 penetrate through the two ends of the rotor core 11 in the axial direction. The first mold has multiple limiting rods, which cooperate with the positioning grooves 113.

[0083] Before the first injection molded body 13 is formed, the rotor core 11 and the permanent magnet 12 are placed in the first mold. The limiting rod in the first mold cooperates with the positioning groove 113 to limit the radial movement of the rotor core 11 and limit the circumferential rotation of the rotor core 11. In this way, when the injection liquid is added into the first mold, the movement of the rotor core 11 can be limited to ensure the smooth progress of injection molding.

[0084] In some embodiments of this utility model, such as Figure 2 As shown, the outer peripheral surface of the rotor core 11 is exposed on the first injection molding body 13, and the second injection molding body 30 wraps the axial end face and outer peripheral surface of the rotor core 11. This facilitates increasing the mating area between the second injection molding body 30 and the rotor core 11, thereby improving the firmness of the connection between the second injection molding body 30 and the rotor core 11 and reducing the possibility of the second injection molding body 30 separating from the rotor core 11.

[0085] Specifically, such as Figure 11 , Figure 12As shown, the second injection molded body 30 includes a first part 301, a second part 302 and a third part 303. The first part 301 wraps one axial end of the rotor core 11, the second part 302 wraps the other axial end of the rotor core 11, and the third part 303 wraps the outer circumferential surface of the rotor core 11. The third part 303 connects the first part 301 and the second part 302.

[0086] The outer circumferential surface of the rotor core 11 has a large area, so the surface area of ​​the third part 303 is also large. This allows the two ends of the third part 303 in the axial direction to be connected to the first part 301 and the second part 302 respectively, so that the third part 303 with a large area is a whole, so that there are no seams on the third part 303, thereby ensuring that the third part 303 with a large area can be more firmly connected to the outer circumferential surface of the rotor core 11 with a large area.

[0087] Since the second injection molded body 30 will directly contact the air and matter outside the impeller rotor assembly 1, the seam on the second injection molded body 30 is prone to detach from the first injection molded body 13 or the rotor core 11. Making the larger third part 303 a whole reduces the risk of the second injection molded body 30 detaching from the first injection molded body 13 or the rotor core 11, and improves the firmness of the connection between the second injection molded body 30 and the rotor core 11.

[0088] Furthermore, by exposing the outer circumferential surface of the rotor core 11 to the first injection molded body 13, it is easier to reduce the radial dimension of the first injection molded body 13. On the one hand, this facilitates the reduction of the overall radial dimension of the impeller rotor assembly 1, and on the other hand, it reduces the obstruction between the permanent magnet 12 and the stator assembly in the electric water pump, which facilitates the coupling between the permanent magnet 12 and the stator assembly and improves the coupling force between the permanent magnet 12 and the stator assembly.

[0089] In some embodiments, the electric water pump includes a stator assembly fitted over a rotor core 11. The stator assembly is capable of generating a rotating magnetic field. When the permanent magnet 12 is attracted by the magnet, it rotates and drives the rotor core 11, the first injection molded body 13, and the second injection molded body 30 to rotate, thereby driving the impeller portion 32 to rotate and thus driving the flow of water.

[0090] In some embodiments of this utility model, such as Figure 1 , Figure 2 As shown, the axial end of the first injection body 13 is provided with a positioning protrusion 131, which is at least partially exposed outside the second injection body 30, so as to position the rotor body 10 during the injection molding of the second injection body 30, so as to smoothly form the second injection body 30.

[0091] Specifically, before the second injection molded body 30 is formed, the rotor body 10 is placed in the second mold so that the positioning protrusion 131 cooperates with the second mold to restrict the radial movement of the rotor body 10 and restrict the axial rotation of the rotor body 10 so that the second injection molded body 30 can be formed smoothly.

[0092] In some optional embodiments of this utility model, such as Figure 1 As shown, the positioning protrusion 131 is provided at one end of the rotor portion 31 facing away from the impeller portion 32, so that after the second injection molded body 30 is formed, the positioning protrusion 131 is still exposed outside the second injection molded body 30, thereby facilitating the subsequent use of the positioning protrusion 131 to limit the position of the impeller rotor assembly 1.

[0093] For example, when magnetizing the permanent magnet 12, the position of the impeller rotor assembly 1 can be limited by the positioning protrusion 131 to prevent the impeller rotor assembly 1 from moving or rotating radially, thereby facilitating the smooth magnetization process.

[0094] In some embodiments, such as Figure 4 , Figure 5 As shown, the first injection molded body 13 has a plurality of positioning protrusions 131 at its axial end. The plurality of positioning protrusions 131 are arranged along the circumference of the rotor core 11. When the rotor body 10 is placed in the second mold, the positioning protrusions 131 cooperate with the grooves in the second mold to restrict the radial movement of the rotor body 10 and restrict the axial rotation of the rotor body 10 so as to smoothly form the second injection molded body 30.

[0095] In some optional embodiments of this utility model, such as Figure 2 , Figure 4 and Figure 5 As shown, the first injection molded body 13 is provided with a sealing part 132, which extends circumferentially along the positioning protrusion 131. The second injection molded body 30 covers the sealing part 132. The sealing part 132 is a protrusion or a groove, which facilitates increasing the mating area between the second injection molded body 30 and the first injection molded body 13, thereby improving the firmness of the connection between the second injection molded body 30 and the first injection molded body 13.

[0096] Meanwhile, by having the second injection molded body 30 wrap around the sealing part 132, compared to forming a flat contact surface between the second injection molded body 30 and the first injection molded body 13, the second injection molded body 30 and the sealing part 132 are fitted by a curved surface, which helps to reduce the risk of liquid flowing to the rotor core 11 through the gap between the first injection molded body 13 and the second injection molded body 30.

[0097] In some embodiments, such as Figure 2As shown, the sealing part 132 is a protrusion. When water enters the gap between the first injection molded body 13 and the second injection molded body 30, it makes it difficult for the liquid to pass through the sealing part 132 and reach the rotor core 11, thereby reducing the risk of liquid flowing to the rotor core 11.

[0098] It needs to be explained here that when the rotor body 10 is placed in the second mold, the positioning protrusion 131 cooperates with the groove in the second mold. Therefore, the second injection molded body 30 cannot completely wrap the first injection molded body 13 beyond the positioning protrusion 131. This results in a seam between the second injection molded body 30 and the first injection molded body 13. By setting the sealing part 132, the risk of the second injection molded body 30 falling off from the first injection molded body 13 is reduced, and the firmness of the connection between the second injection molded body 30 and the first injection molded body 13 is improved.

[0099] In some embodiments of this utility model, such as Figure 4 As shown, the first injection molded body 13 has a positioning through hole 133 at its axial end. The rotor core 11 and / or permanent magnet 12 are exposed through the positioning through hole 133 to the first injection molded body 13. The second injection molded body 30 wraps the exposed part of the rotor core 11 and / or permanent magnet 12 to prevent the rotor core 11 and permanent magnet 12 from being directly exposed, thereby protecting the rotor core 11 and permanent magnet 12.

[0100] In some embodiments, such as Figure 4 As shown, the first injection molded body 13 has multiple positioning through holes 133 at its axial end. The multiple positioning through holes 133 are arranged along the circumference of the rotor core 11. Before the first injection molded body 13 is formed, the rotor core 11 and the permanent magnet 12 are placed in the first mold. The first mold has a protrusion, which is used to limit the position of the rotor core 11 in the axial direction. After the first injection molded body 13 is formed, the positioning through holes 133 are formed at the position where the first injection molded body 13 and the protrusion stop.

[0101] In some embodiments of this utility model, such as Figure 6 As shown, the first injection molded body 13 has a reinforcing part 134 at its axial end. The reinforcing part 134 extends circumferentially along the rotor core 11 to increase the overall strength of the first injection molded body 13. The second injection molded body 30 wraps around the reinforcing part 134, which increases the connection area between the first injection molded body 13 and the second injection molded body 30, thereby increasing the firmness of the connection between the first injection molded body 13 and the second injection molded body 30.

[0102] In some embodiments of this utility model, such as Figure 9As shown, at least a portion of the outer peripheral surface of the bushing 20 is a non-cylindrical surface. The second injection body 30 wraps around at least a portion of the outer peripheral surface of the bushing 20, and the second injection body 30 wraps around the non-cylindrical surface so that the non-cylindrical surface is connected to the second injection body 30 to restrict the rotation of the bushing 20 relative to the second injection body 30.

[0103] In some embodiments, such as Figure 9 As shown, the outer peripheral surface of the bushing 20 is provided with a limiting groove 21 to form a part of a non-cylindrical surface on the outer peripheral surface of the bushing 20. The second injection molded body 30 wraps the outer peripheral surface of the bushing 20 and the groove wall of the limiting groove 21 to restrict the rotation of the bushing 20 relative to the second injection molded body 30.

[0104] In some embodiments of this utility model, such as Figure 9 As shown, the axial end faces of the bushing 20 are provided with flow channel grooves 22. The flow channel grooves 22 are exposed outside the second injection body 30. The flow channel grooves 22 store lubricating oil. When the permanent magnet 12 drives the first injection body 13, the second injection body 30 and the bushing 20 to rotate, the lubricating oil in the flow channel grooves 22 is used to lubricate the axial end faces of the bushing 20 and other components.

[0105] Specifically, in order to limit the axial position of the bushing 20, a limiting ring is provided at the axial end of the bushing 20 to limit the axial position of the bushing 20. When the permanent magnet 12 drives the first injection molding body 13, the second injection molding body 30 and the bushing 20 to rotate, the bushing 20 rotates relative to the limiting ring. The lubricating oil in the flow channel groove 22 is used to lubricate the relative friction between the bushing 20 and the limiting ring, thereby reducing the wear between the limiting ring and the bushing 20.

[0106] Furthermore, when the bushing 20 has a tendency to move axially in the vertical direction, the lubricating oil in the flow channel groove 22 can lubricate the collision between the bushing 20 and the limiting ring, reducing the wear between the limiting ring and the bushing 20.

[0107] Among them, flow channel grooves 22 are provided on both ends of the bushing 20 in the axial direction, so that there is no need to distinguish the direction of the bushing 20 when using it, which facilitates the improvement of processing efficiency.

[0108] In some embodiments of this utility model, the impeller portion 32 includes a first cover plate 41, and the impeller rotor assembly 1 also includes a second cover plate 42 and blades 43. That is, the second injection molded body 30 defines the first cover plate 41, the first cover plate 41 is connected to one axial end of the rotor portion 31, the second cover plate 42 is located on the side of the first cover plate 41 facing away from the rotor portion 31, and the blades 43 are connected between the first cover plate 41 and the second cover plate 42.

[0109] In some embodiments, the second cover plate 42 and the blade 43 are integrally injection molded, and the blade 43 is welded to the first cover plate 41.

[0110] In other embodiments, the blade 43 is welded to the first cover plate 41 and the second cover plate 42, respectively.

[0111] In some embodiments of this utility model, such as Figure 11 , Figure 12 As shown, the impeller portion 32 includes a connected first cover plate 41 and blades 43, i.e., the second injection molded body 30 defines an integral first cover plate 41 and blades 43. The impeller rotor assembly 1 also includes a second cover plate 42. The first cover plate 41 is connected to one axial end of the rotor portion 31, and the second cover plate 42 is located on the side of the first cover plate 41 facing away from the rotor portion 31. The blades 43 are connected between the first cover plate 41 and the second cover plate 42.

[0112] In some embodiments, the blade 43 is welded to the second cover plate 42.

[0113] In some embodiments of this utility model, the impeller portion 32 includes a first cover plate 41, a second cover plate 42 and a blade 43 connected together. That is, the second injection molded body 30 defines an integral first cover plate 41, second cover plate 42 and blade 43. The first cover plate 41 is connected to one axial end of the rotor portion 31, the second cover plate 42 is located on the side of the first cover plate 41 facing away from the rotor portion 31, and the blade 43 is connected between the first cover plate 41 and the second cover plate 42.

[0114] In some optional embodiments of this utility model, such as Figure 14 , Figure 15 As shown, at least one of the first cover plate 41 and the second cover plate 42 is provided with a welding groove 421. The groove wall of the welding groove 421 is provided with a first welding rib 422, and the blade 43 is provided with a second welding rib 431. The second welding rib 431 is inserted into the welding groove 421. The extension directions of the first welding rib 422 and the second welding rib 431 intersect. At least one of the first cover plate 41 and the second cover plate 42 is welded to the blade 43 through the first welding rib 422 and the second welding rib 431, so as to firmly weld and fix the blade 43 to at least one of the first cover plate 41 and the second cover plate 42.

[0115] Specifically, the extension directions of the first welding rib 422 and the second welding rib 431 intersect. In this way, when the first welding rib 422 and the second welding rib 431 melt during welding, the first cover plate 41 and / or the second cover plate 42 can be uniformly welded and fixed together with the blade 43, which facilitates the improvement of the strength of the welded connection.

[0116] In some embodiments, such as Figure 14 , Figure 15As shown, the welding groove 421 is provided with a plurality of first welding ribs 422, which are arranged at intervals along the extension direction of the second welding ribs 431, so that the plurality of first welding ribs 422 and the second welding ribs 431 are uniformly and firmly welded together.

[0117] The following describes an electronic water pump according to an embodiment of the present invention. The electronic water pump according to an embodiment of the present invention includes an impeller rotor assembly 1 according to the above-described embodiment of the present invention.

[0118] Since the impeller rotor assembly 1 according to the present utility model has the above-mentioned beneficial technical effects, the electronic water pump according to the present utility model has the advantages of improving the smoothness of the operation of the impeller part 32 and improving the performance of the electronic water pump.

[0119] In some embodiments, an electric water pump can be used in the thermal management system of a vehicle 1000. The thermal management system is an important component for regulating the automotive cabin environment (temperature, humidity, etc.) and the working environment of other parts. The thermal management system of the vehicle 1000 mainly includes valves, heat exchangers, compressors, and pumps. The pumps include, for example, electric water pumps or other water pumps. The thermal management system has a circulating refrigerant, which can be liquid coolant or carbon dioxide refrigerant, etc.

[0120] The following describes a thermal management system according to an embodiment of the present invention. The thermal management system according to an embodiment of the present invention includes an electronic water pump according to the above-described embodiment of the present invention.

[0121] Since the electronic water pump according to the present invention has the above-mentioned beneficial technical effects, the thermal management system according to the present invention has the advantages of improving the smoothness of the operation of the impeller section 32 and improving the performance of the electronic water pump.

[0122] In some embodiments, the thermal management system is an important component for regulating the automotive cabin environment (temperature, humidity, etc.) and the working environment of other parts. The thermal management system mainly includes valves, heat exchangers, compressors, and pumps, such as electric water pumps or other water pumps. The thermal management system contains a circulating refrigerant, which may be carbon dioxide refrigerant, etc.

[0123] The vehicle 1000 according to an embodiment of the present invention is described below. The vehicle 1000 according to an embodiment of the present invention includes a thermal management system according to the above embodiment of the present invention.

[0124] Since the thermal management system according to the present utility model has the above-mentioned beneficial technical effects, the vehicle 1000 according to the present utility model has advantages such as improving the smoothness of the operation of the impeller section 32 and improving the performance of the electric water pump.

[0125] In this embodiment, vehicle 1000 can be a new energy vehicle. In some embodiments, the new energy vehicle can be a pure electric vehicle with an electric motor as the 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 limitation. 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 protection scope of this utility model.

[0126] In some embodiments, an electric water pump can be used in the thermal management system of a vehicle 1000. The thermal management system is an important component for regulating the automotive cabin environment (temperature, humidity, etc.) and the working environment of other parts. The thermal management system of the vehicle 1000 mainly includes valves, heat exchangers, compressors, and pumps. The pumps include, for example, electric water pumps or other water pumps. The thermal management system has a circulating refrigerant, which can be liquid coolant or carbon dioxide refrigerant, etc.

[0127] The electronic water pump, thermal management system, and other components and operations of the vehicle 1000 according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0128] 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," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not 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. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0129] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature 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.

[0130] 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.

[0131] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., 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.

[0132] 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 impeller rotor assembly of an electronic water pump, characterized by, include: The rotor body includes a rotor core, a permanent magnet, and a first injection molded body. The permanent magnet is mounted on the rotor core, and the first injection molded body is injection molded to connect the rotor core and the permanent magnet. A bushing, which is a single piece and passes through the rotor body; The second injection molded body includes a connected rotor portion and an impeller portion, wherein the rotor portion is injection molded to connect the rotor body and the bushing.

2. The impeller-rotor assembly of an electronic water pump according to claim 1, characterized in that, The rotor core is provided with an axially penetrating mounting groove, and the permanent magnet is inserted into the mounting groove. The rotor core also includes an air groove communicating with the mounting groove, and the first injection molded body fills the air groove.

3. The impeller-rotor assembly of an electronic water pump according to claim 1, characterized in that, At least one of the inner and outer circumferential surfaces of the rotor core is provided with a positioning groove, the positioning groove is exposed outside the first injection molded body, and the second injection molded body wraps the groove wall of the positioning groove.

4. The impeller-rotor assembly of an electronic water pump according to claim 1, characterized in that, The outer peripheral surface of the rotor core is exposed to the first injection molded body, and the second injection molded body wraps around the axial end face and outer peripheral surface of the rotor core.

5. The impeller-rotor assembly of an electronic water pump according to claim 1, wherein The first injection body has a positioning protrusion at its axial end, and the positioning protrusion is at least partially exposed outside the second injection body to position the rotor body during the injection molding of the second injection body.

6. The impeller-rotor assembly of an electronic water pump according to claim 5, characterized in that, The positioning protrusion is located at one end of the rotor portion opposite to the impeller portion.

7. The impeller-rotor assembly of an electronic water pump according to claim 5, wherein The first injection molded body has a sealing part that extends circumferentially along the positioning protrusion, and the second injection molded body wraps around the sealing part, wherein the sealing part is a protrusion or a groove.

8. The impeller-rotor assembly of an electronic water pump according to claim 1, wherein The first injection molded body has a positioning through hole at its axial end. The rotor core and / or the permanent magnet are exposed through the positioning through hole in the first injection molded body. The second injection molded body covers the exposed portion of the rotor core and / or the permanent magnet.

9. The impeller-rotor assembly of an electronic water pump according to claim 1, wherein The first injection molded body has a reinforcing part at its axial end, the reinforcing part extends circumferentially along the rotor core, and the second injection molded body wraps around the reinforcing part.

10. The impeller-rotor assembly of an electronic water pump according to claim 1, wherein At least a portion of the outer peripheral surface of the bushing is a non-cylindrical surface, and the second injection molded body wraps around at least a portion of the outer peripheral surface of the bushing, and the second injection molded body wraps around the non-cylindrical surface.

11. The impeller-rotor assembly of an electronic water pump according to claim 1, characterized in that, The bushing has flow channel grooves on both axial end faces, and the flow channel grooves are exposed outside the second injection molded body.

12. The impeller-rotor assembly of an electronic water pump according to claim 1, characterized in that, The impeller portion includes a first cover plate, and the impeller rotor assembly further includes a second cover plate and blades; or, the impeller portion includes a connected first cover plate and blades, and the impeller rotor assembly further includes a second cover plate; or, the impeller portion includes a connected first cover plate, second cover plate, and blades. The first cover plate is connected to one axial end of the rotor, the second cover plate is located on the side of the first cover plate facing away from the rotor, and the blade is connected between the first cover plate and the second cover plate.

13. The impeller-rotor assembly of an electronic water pump according to claim 12, characterized in that, At least one of the first cover plate and the second cover plate is provided with a welding groove, the wall of the welding groove is provided with a first welding rib, the blade is provided with a second welding rib, the second welding rib is inserted into the welding groove, the extension directions of the first welding rib and the second welding rib intersect, and at least one of the first cover plate and the second cover plate is welded to the blade through the first welding rib and the second welding rib.

14. An electronic water pump characterized by Includes the impeller rotor assembly of the electronic water pump according to any one of claims 1-13.

15. A thermal management system, characterized by, Including the electronic water pump according to claim 14.

16. A vehicle characterized by comprising: Includes the thermal management system according to claim 15.

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