Electronic water pump, thermal management system, and vehicle

Abstract

The utility model discloses a kind of electronic water pump, thermal management system and vehicle, electronic water pump includes: casing, casing has the installation cavity of end open, installation cavity is used to accommodate rotor assembly;Pump cover, pump cover cover is located at the open end of installation cavity, and pump cover is cooperated with casing and defines pump cavity, pump cavity is used to accommodate impeller assembly;Thrust structure, thrust structure is located at pump cover and includes thrust part and damping part, thrust part is used to with rotor assembly axial end close to impeller assembly Resists, damping part is at least partially located in the side of thrust part away from rotor assembly. According to the electronic water pump of the utility model embodiment, by setting thrust structure in pump cover, thrust part can be axially thrust limited for rotor assembly, damping part can increase vibration transmission damping, to reduce the transmission rate of the vibration of rotor assembly to pump cover through thrust structure, to reduce structural vibration and noise, improve the NVH performance of electronic water pump.

Description

Technical Field

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

[0002] With the rapid development of the new energy vehicle industry, electronic water pumps are gradually replacing traditional mechanical water pumps. When an electronic water pump operates, the flow of liquid, such as coolant, is controlled by the rotation of the impeller rotor assembly. As the impeller rotor assembly rotates, the liquid pressure on both sides of the impeller rotor assembly along its axial direction is uneven, causing the impeller rotor assembly to move axially, resulting in vibration and noise.

[0003] In related technologies, a thrust structure is used to suppress the axial movement of the impeller rotor assembly. However, this causes the vibration of the impeller rotor assembly to be transmitted to the thrust structure and then to the housing, affecting the NVH performance of the electric water pump. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide an electronic water pump that reduces the vibration transmission rate to the pump cover.

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

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

[0007] An electronic water pump according to an embodiment of the present invention includes: a housing having an open-end mounting cavity for accommodating a rotor assembly; a pump cover covering the open end of the mounting cavity and cooperating with the housing to define a pump chamber for accommodating an impeller assembly; and a thrust structure disposed on the pump cover and including a thrust portion and a vibration damping portion, the thrust portion abutting against one end of the rotor assembly axially close to the impeller assembly, and the vibration damping portion being at least partially located on the side of the thrust portion opposite to the rotor assembly.

[0008] According to the embodiment of the present invention, the electronic water pump has a thrust structure in the pump cover. The thrust part can axially thrust and limit the rotor assembly, and the vibration damping part can increase the vibration transmission damping to reduce the transmission rate of the rotor assembly vibration to the pump cover through the thrust structure, thereby reducing structural vibration and noise and improving the NVH performance of the electronic water pump.

[0009] In addition, the electronic water pump according to the above embodiments of this utility model may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the electronic water pump further includes a mounting shaft, which is fixed to the housing, the rotor assembly is rotatably sleeved on the mounting shaft, and the thrust structure is sleeved on the mounting shaft.

[0011] According to some embodiments of this utility model, the thrust structure is clearance-fitted, transition-fitted, or interference-fitted with the mounting shaft.

[0012] According to some embodiments of the present invention, the pump cover includes a cover body and a bracket. The cover body cooperates with the housing to define the pump cavity. The bracket is disposed on the cover body and passes through the liquid inlet channel of the impeller assembly. The thrust structure is installed on the bracket.

[0013] According to some embodiments of the present invention, the bracket has a mounting groove, and the thrust structure is inserted into the mounting groove, wherein the bracket and the thrust structure are integrally injection molded together; or, the thrust structure and the bracket are interference-fitted together.

[0014] According to some embodiments of the present invention, the outer peripheral surface of the thrust portion is provided with an anti-detachment portion, the bracket is provided with an anti-detachment mating portion, the anti-detachment portion is located in the mounting groove, and the anti-detachment mating portion stops the anti-detachment portion on the side near the rotor assembly.

[0015] According to some embodiments of the present invention, at least a portion of the thrust portion has a non-circular outer contour in the cross-sectional direction perpendicular to the axis, and at least a portion of the groove peripheral wall cross-section of the mounting groove is a non-circular shape that matches the shape of the thrust portion.

[0016] According to some embodiments of the present invention, a portion of the thrust portion is located outside the mounting groove, and the exposed portion of the thrust portion is used to abut against the rotor assembly.

[0017] According to some embodiments of the present invention, the thrust portion is bonded to the vibration damping portion; and / or, the vibration damping portion is bonded to the pump cover.

[0018] According to some embodiments of the present invention, the thrust stop is made of ceramic; and / or the vibration damping part is made of rubber or a spring.

[0019] According to some embodiments of the present invention, the impeller assembly is connected to the rotor assembly, and when the rotor assembly abuts against the thrust structure, the impeller assembly is spaced apart from the pump cover by a predetermined gap.

[0020] The thermal management system according to an embodiment of the present invention includes an electronic water pump according to an embodiment of the present invention.

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

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is an exploded view of an electronic water pump according to some embodiments of the present invention;

[0025] Figure 2 This is a cross-sectional view of an electronic water pump according to some embodiments of the present invention;

[0026] Figure 3 This is a schematic diagram of the thrust portion according to some embodiments of the present invention;

[0027] Figure 4 This is a cross-sectional view of an electronic water pump according to other embodiments of the present invention;

[0028] Figure 5 This is a schematic diagram of a vehicle according to an embodiment of the present utility model.

[0029] Figure label:

[0030] 100 electronic water pumps; 200 thermal management systems; 300 vehicles;

[0031] Housing 10; Mounting cavity 101;

[0032] Pump cover 20; pump chamber 201; cover body 21; bracket 22; mounting groove 221; anti-detachment mating part 222;

[0033] Thrust structure 40; Thrust part 41; Anti-detachment part 411; Vibration damping part 42;

[0034] Impeller assembly 50; Liquid inlet channel 501;

[0035] Rotor assembly 60; mounting shaft 70; rear cover 80. Detailed Implementation

[0036] 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.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] In the description of this utility model, "first feature" and "second feature" may include one or more of the features, "multiple" means two or more, "first feature above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them, and "first feature above", "above" and "over" the second feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0039] With the rapid development of the new energy vehicle industry, electronic water pumps are gradually replacing traditional mechanical water pumps. When an electronic water pump operates, the flow of liquid, such as coolant, is controlled by the rotation of the impeller rotor assembly. As the impeller rotor assembly rotates, the liquid pressure on both sides of the axial direction is uneven, causing the impeller rotor assembly to move axially, resulting in vibration and noise.

[0040] In related technologies, a thrust structure is used to suppress the axial movement of the impeller rotor assembly. However, when the impeller rotor assembly moves axially, the thrust structure restricts this movement and transmits the vibration to the thrust structure, which in turn transmits it to the electric water pump housing. Therefore, it is necessary to design a thrust structure that can suppress the axial movement of the impeller rotor assembly and reduce the vibration transmission rate of the impeller rotor assembly, thereby reducing structural vibration noise and improving the NVH performance of the electric water pump.

[0041] In view of this, this application proposes an electronic water pump 100 that can reduce the transmission rate of vibration of rotor assembly 60 to pump cover 20 through thrust structure 40, thereby reducing structural vibration and noise and improving the NVH performance of electronic water pump 100.

[0042] The electronic water pump 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0043] Reference Figure 1 , Figure 2 and Figure 4 As shown, the electronic water pump 100 according to an embodiment of the present invention may include: a housing 10, a pump cover 20, and a thrust structure 40.

[0044] Specifically, the housing 10 has an open-end mounting cavity 101 for accommodating the rotor assembly 60. A pump cover 20 is disposed over the open end of the mounting cavity 101, and the pump cover 20 cooperates with the housing 10 to define a pump chamber 201 for accommodating the impeller assembly 50.

[0045] Therefore, the impeller assembly 50 is located on one axial side of the rotor assembly 60, and the rotor assembly 60 and the impeller assembly 50 can constitute an impeller-rotor assembly. The housing 10 and the pump cover 20 provide installation space for the impeller-rotor assembly and provide a flow path for the liquid. The rotor assembly 60 can drive the impeller assembly 50 to rotate within the pump chamber 201 to realize the pumping of fluid within the pump chamber 201.

[0046] During the pumping process, the liquid enters the pump chamber 201 under the drive of the impeller assembly 50, is pressurized, and then discharged from the pump chamber 201, resulting in different liquid pressures on both sides of the impeller assembly 50 in the axial direction. Furthermore, because the mounting chamber 101 is connected to the pump chamber 201, the liquid pressures on both sides of the rotor assembly 60 in the axial direction are also different. This difference in liquid pressure causes the impeller assembly 50 and the rotor assembly 60 to move axially during rotation.

[0047] Therefore, in the embodiments of this application, a thrust structure 40 is provided, which is disposed on the pump cover 20 and includes a thrust portion 41 and a vibration damping portion 42. The thrust portion 41 is used to abut against the end of the rotor assembly 60 axially close to the impeller assembly 50, and the vibration damping portion 42 is at least partially located on the side of the thrust portion 41 facing away from the rotor assembly 60.

[0048] The thrust stop 41 can always abut against the rotor assembly 60 whether the rotor assembly 60 is rotating or not, so as to improve the axial thrust limiting effect; or, the thrust stop 41 can be spaced apart from the rotor assembly 60 when the rotor assembly 60 is not rotating, and abut against the rotor assembly 60 when the rotor assembly 60 is rotating. This can also achieve a good axial thrust effect and reduce the impact of assembly error and machining error.

[0049] The vibration damping section 42 is at least partially located on the side of the thrust section 41 facing away from the rotor assembly 60, allowing vibrations from the rotor assembly 60 to be further transmitted axially to the portion of the vibration damping section 42 located on the axial side of the thrust section 41 facing away from the rotor assembly 60 after being transmitted to the thrust section 41. The vibration damping section 42 can increase the damping of vibration transmission, thereby reducing the further axial transmission of vibration, thus reducing the vibration transmission rate of the rotor assembly 60 to the pump cover 20 through the thrust structure 40, thereby reducing structural vibration and noise.

[0050] Furthermore, by separating the damping part 42 from the rotor assembly 60 through the thrust part 41, the thrust part 41 can directly abut against the rotor assembly 60 to achieve limiting, thereby improving the stability of thrust limiting; and since the damping part 42 does not directly contact the rotor assembly 60, the damping part 42 is less likely to be worn during the rotation of the rotor assembly 60, thereby improving the service life of the thrust structure 40.

[0051] According to the embodiment of the present invention, the electronic water pump 100 has a thrust structure 40 provided on the pump cover 20. The thrust part 41 can axially thrust and limit the rotor assembly 60, and the vibration damping part 42 can increase the vibration transmission damping, thereby reducing the transmission rate of the vibration of the rotor assembly 60 to the pump cover 20 through the thrust structure 40, thereby reducing structural vibration and noise, and improving the NVH performance of the electronic water pump 100.

[0052] According to some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the electric water pump 100 also includes a mounting shaft 70, which is fixed to the housing 10. The rotor assembly 60 is rotatably sleeved on the mounting shaft 70, and the thrust structure 40 is sleeved on the mounting shaft 70. In other words, the rotor assembly 60, the thrust part 41, and the vibration damping part 42 are all sleeved on the mounting shaft 70 and arranged sequentially along the axial direction of the mounting shaft 70.

[0053] The mounting shaft 70 provides mounting support for the rotor assembly 60 and the thrust structure 40, and improves the coaxiality of the rotor assembly 60 and the thrust structure 40, thereby improving the axial thrust reliability of the thrust structure 40 on the rotor assembly 60, and ensuring that the vibration of the rotor assembly 60 is accurately transmitted to the vibration damping part 42 to improve the vibration damping effect.

[0054] In some embodiments, the thrust structure 40 and the mounting shaft 70 can be clearance-fitted, transition-fitted, or interference-fitted. A clearance-fit between the thrust structure 40 and the mounting shaft 70 reduces the interference of machining errors on assembly and makes assembly easier; transition-fitted and interference-fitted fits are more conducive to improving the coaxiality of the thrust structure 40 and the mounting shaft 70, and thus improve thrust reliability and vibration damping effect.

[0055] According to some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the pump cover 20 includes a cover body 21 and a bracket 22. The cover body 21 cooperates with the housing 10 to define the pump chamber 201. The bracket 22 is disposed on the cover body 21 and passes through the liquid inlet channel 501 of the impeller assembly 50. The thrust structure 40 is installed on the bracket 22.

[0056] By providing a bracket 22 on the cover body 21 for mounting the thrust structure 40, the thrust structure 40 can be located at any position in the pump chamber 201 or the mounting chamber 101, making the position setting more flexible and facilitating the adjustment of the relative position between the thrust structure 40 and the rotor assembly 60, which is more conducive to improving the thrust and vibration reduction effects.

[0057] Here, the specific structure of the bracket 22 can be flexibly set according to the actual situation, for example, it can be like this: Figure 2 and Figure 4 The device includes multiple arms, one end of which is connected to the cover body 21 and the other end is connected to each other. The thrust structure 40 can be installed on the connected ends of the multiple arms to improve installation stability.

[0058] The liquid inlet channel 501 of the impeller assembly 50 refers to the channel through which liquid entering the pump chamber 201 can enter the impeller assembly 50, so as to pressurize the liquid through the impeller assembly 50. For example Figure 2 and Figure 4 As shown, the impeller assembly 50 includes an upper cover plate, a lower cover plate, and multiple blades located between the upper cover plate and the lower cover plate. The upper cover plate is provided with a through hole for liquid inlet, and the multiple blades are arranged circumferentially along the through hole so that the area enclosed by the through hole and the multiple blades forms the liquid inlet channel 501 of the impeller assembly 50.

[0059] The connection between the bracket 22 and the thrust structure 40 can be, but is not limited to, injection molding, insertion, bonding, or snap-fit. For example, the bracket 22 can have a mounting groove 221, into which the thrust structure 40 is inserted. The groove wall of the mounting groove 221 can limit the position of the thrust structure 40, thereby stabilizing its position and enabling it to accurately achieve thrust and vibration damping effects.

[0060] In some embodiments, such as Figure 2 As shown, the bracket 22 and the thrust structure 40 are integrally injection molded together. During the production process, the bracket 22 can be formed by injection molding. During the injection molding process, the thrust structure 40 can be placed in the injection mold so that the connection between the bracket 22 and the thrust structure 40 can be applied at the same time as the bracket 22 is injection molded, without the need for subsequent assembly, and the connection between the thrust structure 40 and the bracket 22 is more secure.

[0061] In other embodiments, such as Figure 4 As shown, the thrust structure 40 is interference-fitted with the bracket 22. During production, the bracket 22, with a pre-reserved mounting groove 221, is processed using injection molding and other processes. Then, the thrust structure 40 is interference-fitted into the mounting groove 221, thus connecting the thrust structure 40 to the bracket 22. The material of the thrust structure 40 is not affected by factors such as temperature during the production of the bracket 22, allowing for more flexible material selection.

[0062] In some embodiments, such as Figure 2 and Figure 3 As shown, the outer peripheral surface of the thrust portion 41 is provided with an anti-detachment portion 411, and the bracket 22 is provided with an anti-detachment mating portion 222. The anti-detachment portion 411 is located in the mounting groove 221, and the anti-detachment mating portion 222 stops the anti-detachment portion 411 on the side near the rotor assembly 60.

[0063] By cooperating with the anti-detachment mating part 222 and the anti-detachment part 411 to form an anti-detachment structure, the thrust stop 41 can be stopped within the mounting groove 221, preventing the thrust stop 40 from coming out of the mounting groove 221, thus further improving the connection reliability between the thrust stop 40 and the bracket 22. Furthermore, in the embodiment where the bracket 22 and the thrust stop 40 are integrally injection molded, the injection molding process allows the insertion of the thrust stop 40 and the bracket 22 to be unrestricted by the anti-detachment structure, and the interference between the anti-detachment part 411 and the anti-detachment mating part 222 can be greater, thereby improving the anti-detachment effect.

[0064] Here, the anti-detachment part 411 and the anti-detachment mating part 222 can extend in a ring structure (circular ring, square ring, etc.) along the circumference of the thrust part 41, or they can extend in an arc structure along the circumference of the thrust part 41, or they can include a plurality of protrusions spaced apart along the circumference of the thrust part 41. All of these are within the protection scope of this utility model.

[0065] In some embodiments, such as Figure 2 and Figure 3 As shown, at least a portion of the thrust portion 41 has a non-circular outer profile in the cross-sectional direction perpendicular to the axis, and at least a portion of the groove peripheral wall cross-section of the mounting groove 221 is non-circular and matches the shape of the thrust portion 41.

[0066] The non-circular portion of the outer contour of the thrust portion 41 matches the non-circular portion of the groove wall of the mounting groove 221, so that the groove wall can play a role in preventing the thrust portion 41 from rotating in the circumferential direction. As a result, the thrust portion 41 will not rotate with the rotor assembly 60. Wear is not likely to occur between the thrust portion 41 and the vibration damping portion 42, or between the thrust portion 41 and the bracket 22. The thrust structure 40 has good structural stability, which is conducive to improving thrust and vibration damping stability.

[0067] For example, in some embodiments where the thrust portion 41 is provided with the anti-detachment portion 411, such as Figure 3 As shown, the outer contour shape of the anti-slip part 411 can be adjusted to be non-circular, thus making part of the outer contour of the thrust part 41 non-circular. Of course, the outer contour shape of the anti-slip part 411 can be, but is not limited to, […]. Figure 3 The diagram shows a structure that includes both arc surfaces and planes.

[0068] In some embodiments, the end face of the thrust portion 41 may be flush with the opening of the mounting groove 221, and the end face may be used to abut against the rotor assembly 60; or, the thrust portion 41 may be completely located within the mounting groove 221, and when axial movement occurs, a portion of the rotor assembly 60 may extend into the mounting groove 221 and abut against the thrust portion 41.

[0069] In other embodiments, such as Figure 2 and Figure 4 As shown, part of the thrust portion 41 is located outside the mounting groove 221, and the exposed portion of the thrust portion 41 is used to abut against the rotor assembly 60. The exposed portion of the thrust portion 41 provides axial thrust limiting for the rotor assembly 60, making it less likely for the rotor assembly 60 to directly contact the bracket 22, reducing wear on the bracket 22, improving the service life of the bracket 22 and the installation stability of the thrust structure 40, and also helping to reduce the transmission of vibration to the pump cover 20, thus reducing the vibration transmission rate.

[0070] According to some embodiments of this utility model, the thrust portion 41 and the vibration damping portion 42 can be bonded together. Bonding prevents the thrust portion 41 and the vibration damping portion from moving or rotating relative to each other, facilitating the transmission of vibration from the thrust portion 41 to the vibration damping portion 42, improving the vibration damping effect, and reducing wear on both the thrust portion 41 and the vibration damping portion 42.

[0071] According to some embodiments of this utility model, the vibration damping part 42 and the pump cover 20 can be bonded together. Bonding prevents the vibration damping part 42 and the pump cover 20 from moving or rotating relative to each other, which helps reduce wear on the pump cover 20 and the vibration damping part 42.

[0072] In some embodiments of this utility model, the hardness of the thrust-stopping part 41 is greater than that of the vibration-damping part 42, so that the thrust-stopping part 41 can play a good thrust-stopping effect and the vibration-damping part 42 can play a good vibration-damping effect.

[0073] In some embodiments, the thrust portion 41 can be made of ceramic material, which has high hardness and is not easily worn, so that when the thrust portion 41 and the rotor assembly 60 rotate relative to each other, the thrust portion 41 is not easily worn and thus does not affect the thrust accuracy.

[0074] In some embodiments, the damping part 42 can be made of rubber or an elastic material such as a spring. Both rubber and springs can increase damping and achieve a good vibration reduction effect.

[0075] According to some embodiments of this utility model, such as Figure 2 and Figure 4As shown, the impeller assembly 50 is connected to the rotor assembly 60. With the rotor assembly 60 abutting against the thrust structure 40, the impeller assembly 50 is spaced apart from the pump cover 20 by a predetermined gap. Thus, the thrust and vibration damping are integrated at the thrust structure 40, eliminating the need for contact between the impeller assembly 50 and the pump cover 20, preventing relative friction, and reducing the resistance to rotation of the impeller assembly 50 and minimizing wear.

[0076] like Figure 5 As shown, the thermal management system 200 according to an embodiment of the present invention includes an electronic water pump 100 according to an embodiment of the present invention. Since the electronic water pump 100 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the thermal management system 200 according to an embodiment of the present invention, by providing a thrust structure 40 on the pump cover 20, the thrust portion 41 can axially thrust and limit the rotor assembly 60, and the vibration damping portion 42 can increase the vibration transmission damping, thereby reducing the transmission rate of vibration of the rotor assembly 60 to the pump cover 20 through the thrust structure 40, thereby reducing structural vibration and noise, and improving the NVH performance of the electronic water pump 100.

[0077] The thermal management system 200 can be used to regulate the automotive cabin environment (temperature, humidity, etc.) and the working environment of other components. In some embodiments, the thermal management system 200 mainly includes: valves, heat exchangers, compressors, and pumps, such as an electric water pump 100 or other water pumps. The thermal management system 200 has a circulating working medium, which can be carbon dioxide refrigerant, coolant, etc.

[0078] like Figure 5 As shown, the vehicle 300 according to an embodiment of the present invention includes a thermal management system 200 according to an embodiment of the present invention. Since the thermal management system 200 according to an embodiment of the present invention has the aforementioned beneficial technical effects, the vehicle 300 according to an embodiment of the present invention, by providing a thrust structure 40 on the pump cover 20, can have the thrust portion 41 axially thrust-limit the rotor assembly 60, and the vibration damping portion 42 can increase the vibration transmission damping, thereby reducing the transmission rate of vibration of the rotor assembly 60 to the pump cover 20 through the thrust structure 40, thereby reducing structural vibration and noise, and improving the NVH performance of the electric water pump 100.

[0079] In this embodiment, vehicle 300 can be a new energy vehicle. In some embodiments, the new energy vehicle can be a pure electric vehicle with an electric motor as the main driving force. In other embodiments, the new energy vehicle can also be a hybrid vehicle with both an internal combustion engine and an electric motor as the main driving force. Regarding the internal combustion engine and electric motor mentioned in the above embodiments that provide driving power for the new energy vehicle, the internal combustion engine can use gasoline, diesel, hydrogen, etc. as fuel, and the way to provide electrical energy to the electric motor can be a power battery, hydrogen fuel cell, etc., without special limitations. It should be noted that this is merely an exemplary description of the structure of new energy vehicles, etc., and is not intended to limit the scope of protection of this utility model.

[0080] The following describes in detail an electronic water pump 100 according to a specific embodiment of the present invention with reference to the accompanying drawings. It is to be understood that the following description is merely illustrative and should not be construed as limiting the present invention.

[0081] like Figures 1-3 As shown, an electronic water pump 100 according to a specific embodiment of the present invention includes a housing, an impeller rotor assembly, a stator assembly, and a thrust structure 40. The housing includes a casing 10, a pump cover 20, and a rear cover 80. The casing 10 is injection molded to enclose the stator assembly and defines a mounting cavity 101; the cover body 21 of the pump cover 20 is disposed on one axial end of the casing 10 to define a pump cavity 201; the rear cover 80 is disposed on the other axial end of the casing 10 to define a receiving cavity for accommodating control components. The pump cover 20 has an inlet and an outlet.

[0082] The impeller rotor assembly includes an impeller assembly 50 and a rotor assembly 60 connected sequentially along the axial direction, and the two are connected by injection molding. The impeller assembly 50 is located in the pump chamber 201 and is used to pressurize the liquid flowing into the pump chamber 201 through the inlet; the rotor assembly 60 is located in the mounting chamber 101, and a mounting shaft 70 is fixed inside the housing 10. The rotor assembly 60 has a mounting hole in the center for assembly with the mounting shaft 70.

[0083] The pump cover 20 includes a bracket 22 integrally injection molded with the cover body 21, and the bracket 22 has a mounting groove 221. The thrust structure 40 includes a thrust portion 41 and a damping portion 42, both of which are sleeved on the mounting shaft 70 and fixed by integrally molding with the bracket 22. The bracket 22 and the mounting shaft 70, the thrust portion 41 and the mounting shaft 70, and the damping portion 42 and the mounting shaft 70 are all clearance fits. The thrust portion 41 has a stepped structure along the axial direction, with the axially protruding part extending out of the mounting groove 221 to limit the axial displacement of the rotor assembly 60. The radially protruding outer edge serves as an anti-detachment part 411 that engages with the mounting groove 221 to fix the thrust structure 40 and limit its axial displacement. The two sides of the anti-detachment part 411 are flattened to limit the rotation of the thrust portion 41 and reduce wear.

[0084] In the above embodiments, the thrust structure 40 can limit the axial movement of the impeller rotor assembly, thereby reducing structural vibration and noise. Furthermore, by providing a damping section 42 between the thrust section 41 and the support 22, damping can be increased, reducing the vibration transmission rate of the impeller rotor assembly vibration to the pump cover 20 through the thrust structure 40, thereby reducing structural vibration and noise and improving the NVH performance of the electric water pump 100.

[0085] like Figure 4 As shown, according to another specific embodiment of the present invention, the electronic water pump 100 is, with Figure 2 The difference in the illustrated embodiment is that the thrust portion 41 does not have an anti-detachment portion 411, and the bracket 22 does not have an anti-detachment mating portion 222. The bracket 22 is interference-fitted with the thrust structure 40, and after the bracket 22 is injection molded, the thrust structure 40 is then assembled into the reserved mounting groove 221.

[0086] Other configurations and operations of the electronic water pump 100, thermal management system 200, and vehicle 300 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0087] 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.

[0088] In the description of this specification, the references to terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electronic water pump, characterized in that, include: A housing having an end-open mounting cavity for accommodating a rotor assembly; A pump cover is disposed on the open end of the mounting cavity, and the pump cover cooperates with the housing to define a pump cavity for accommodating the impeller assembly; A thrust structure is provided on the pump cover and includes a thrust portion and a vibration damping portion. The thrust portion is used to abut against one end of the rotor assembly axially close to the impeller assembly, and the vibration damping portion is at least partially located on the side of the thrust portion opposite to the rotor assembly.

2. The electronic water pump according to claim 1, characterized in that, It also includes a mounting shaft, which is fixed to the housing, the rotor assembly is rotatably sleeved on the mounting shaft, and the thrust structure is sleeved on the mounting shaft.

3. The electronic water pump according to claim 2, characterized in that, The thrust structure is fitted with the mounting shaft with a clearance fit, transition fit, or interference fit.

4. The electronic water pump according to claim 1, characterized in that, The pump cover includes a cover body and a bracket. The cover body cooperates with the housing to define the pump chamber. The bracket is disposed on the cover body and passes through the liquid inlet channel of the impeller assembly. The thrust structure is installed on the bracket.

5. The electronic water pump according to claim 4, characterized in that, The bracket has a mounting groove, and the thrust structure is inserted into the mounting groove, wherein... The bracket and the thrust structure are integrally injection molded together; or, the thrust structure and the bracket are interference-fitted together.

6. The electronic water pump according to claim 5, characterized in that, The outer peripheral surface of the thrust portion is provided with an anti-detachment portion, and the bracket is provided with an anti-detachment mating portion. The anti-detachment portion is located in the mounting groove, and the anti-detachment mating portion stops the anti-detachment portion on the side near the rotor assembly.

7. The electronic water pump according to claim 5, characterized in that, At least a portion of the thrust portion has a non-circular outer profile in the cross-sectional direction perpendicular to the axis, and at least a portion of the groove peripheral wall cross-section of the mounting groove is non-circular and matches the shape of the thrust portion.

8. The electronic water pump according to claim 5, characterized in that, Part of the thrust portion is located outside the mounting groove, and the exposed portion of the thrust portion is used to abut against the rotor assembly.

9. The electronic water pump according to claim 1, characterized in that, The thrust portion is bonded to the vibration damping portion; and / or, the vibration damping portion is bonded to the pump cover.

10. The electronic water pump according to claim 1, characterized in that, The thrust stop is made of ceramic; and / or the damping part is made of rubber or a spring.

11. The electronic water pump according to any one of claims 1-10, characterized in that, The impeller assembly is connected to the rotor assembly. When the rotor assembly is in contact with the thrust structure, the impeller assembly is spaced apart from the pump cover by a predetermined gap.

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

13. A vehicle, characterized in that, Includes the thermal management system according to claim 12.

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