Electric water pump and vehicle
By forming a drainage section on the outer ring of the bearing sleeve, the problem of coolant not being able to drain is solved, thus achieving stable operation and extending the service life of the electric water pump.
Patent Information
- Application Number
- CN202520457492.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-03-17
AI Technical Summary
In existing electric water pumps, the coolant cannot be effectively discharged from the gap between the stator and rotor, resulting in heat accumulation and affecting operational stability.
A drain section is formed on the outer wall surface of the outer ring of the bearing sleeve, which is connected to the liquid passage gap. This drain section is used to discharge the coolant between the rotor and the bearing sleeve. The coolant is discharged through the drain section.
It effectively reduces the accumulation of coolant in the fluid passage, promptly removes absorbed heat, ensures the operational stability of the electric water pump, and extends its service life.
Smart Images
Figure CN223978517U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle water pump technology, and more specifically, to an electric water pump and a vehicle. Background Technology
[0002] Electric water pumps typically use a motor to drive an impeller to rotate, thereby guiding the liquid. To ensure the stable positioning and rotation of the motor and impeller, electric water pumps usually have a positioning shaft and a bearing sleeve. The bearing sleeve is mounted on the positioning shaft, and its outer ring is connected to the rotor of the motor, thus enabling the rotor to rotate relative to the positioning shaft.
[0003] However, since the rotor and bearing sleeve are not a single integrated structure, there are gaps between them, and there are also gaps between the stator and rotor. Therefore, the coolant absorbs heat emitted by the stator and the bottom circuit board as it passes through the gaps between the stator and rotor. But in the existing structure, the coolant cannot drain out through the gaps between the rotor and bearing sleeve, so the absorbed heat cannot be released, causing the internal temperature to rise and affecting the stable operation of the electric water pump.
[0004] Therefore, there is an urgent need to provide an electric water pump and vehicle to address the problems existing in the prior art to some extent. Utility Model Content
[0005] The purpose of this utility model is to provide an electric water pump and vehicle that can optimize the internal structure of the electric water pump to a certain extent, and avoid the problem of internal temperature accumulation caused by the inability of coolant entering the gap between the stator and rotor to be discharged, which affects the overall stable operation of the electric water pump.
[0006] The embodiments of this utility model can be implemented as follows:
[0007] In a first aspect, this utility model provides an electric water pump, including a drive assembly, a bearing sleeve, and a positioning part; the drive assembly includes a stator and a rotor, the positioning part is formed at the center position inside the drive assembly, the inner ring of the bearing sleeve is sleeved on the positioning part, and the bearing sleeve is rotatable relative to the positioning part, the rotor is sleeved on the outer ring of the bearing sleeve, and the inner ring of the rotor and the outer ring of the bearing sleeve form a liquid passage gap, the bearing sleeve forms a drain part communicating with the liquid passage gap, the drain part axially penetrates both ends of the outer wall of the outer ring of the bearing sleeve, so that the coolant in the liquid passage gap can be discharged from the drain part.
[0008] In an optional embodiment, there are multiple drainage sections distributed circumferentially along the bearing sleeve and capable of penetrating both ends of the outer wall of the outer ring of the bearing sleeve in the axial direction.
[0009] In an optional embodiment, the plurality of drainage portions are all drainage grooves, and the drainage grooves extend along the axial direction of the bearing sleeve and penetrate both ends of the outer wall surface of the outer ring of the bearing sleeve along the axial direction of the bearing sleeve.
[0010] In an optional embodiment, all of the draining parts are draining troughs, and the draining troughs have a spiral structure. The direction of rotation of the draining troughs is the same as that of the rotor, and the draining troughs can penetrate the outer wall surface of the outer ring of the bearing sleeve at both ends in the axial direction.
[0011] In an optional embodiment, the drive assembly further includes a housing having a first receiving cavity and a second receiving cavity, the stator being disposed in the first receiving cavity, the positioning part being located at the center of the second receiving cavity, and the bearing sleeve and the rotor being located in the second receiving cavity, with the rotor corresponding to the stator.
[0012] In an optional embodiment, an impeller is also included, which is connected to the rotor.
[0013] In an optional embodiment, a pump volute is further included, wherein the pump volute is sealed to the housing to form a flow guide cavity, and the impeller is located within the flow guide cavity;
[0014] The pump casing has an inlet channel and an outlet channel that are connected to the flow guide cavity. The impeller draws coolant into the flow guide cavity through the inlet channel and directs the coolant to the outlet channel.
[0015] In an optional embodiment, a rear cover and a controller assembly are also included, wherein the rear cover is sealed to the housing to form a sealed cavity, and the controller assembly is disposed within the sealed cavity.
[0016] In an optional embodiment, a first sealing ring and a second sealing ring are also included, wherein the pump volute is sealed to the housing through the first sealing ring, and the rear cover is sealed to the housing through the second sealing ring.
[0017] Secondly, this utility model provides a vehicle including the electric water pump described in any of the foregoing embodiments.
[0018] The beneficial effects of the electric water pump and vehicle provided in this embodiment of the invention include:
[0019] By forming a drain section on the outer wall of the outer ring of the bearing sleeve that can communicate with the fluid passage gap, the coolant between the rotor and the bearing sleeve can be discharged, thereby reducing the accumulation of coolant in the fluid passage gap to a certain extent, and allowing the heat absorbed by the coolant to be dissipated in time, thus ensuring the stability of the electric water pump operation. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is an internal sectional view of the electric water pump provided in this embodiment;
[0022] Figure 2 This is a first-view structural schematic diagram of the rotor and impeller assembly in the electric water pump provided in this embodiment.
[0023] Figure 3 This is a second-view structural schematic diagram of the rotor and impeller assembly in the electric water pump provided in this embodiment.
[0024] Icons: 1-Housing; 2-Stator; 3-Rotor; 4-Positioning part; 5-Bearing sleeve; 501-Drainage tank; 6-Impeller; 701-Guide cavity; 7-Pump volute; 801-Sealing cavity; 8-Rear cover; 9-Controller assembly. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0026] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing the 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. Therefore, they should not be construed as limitations on the utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0028] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" 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.
[0029] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.
[0030] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device during use or operation.
[0031] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.
[0032] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.
[0033] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have various constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.
[0034] like Figures 1-3 As shown, this utility model provides an electric water pump, including a drive assembly, a bearing sleeve 5, and a positioning part 4. The drive assembly includes a stator 2 and a rotor 3. The positioning part 4 is formed at the center position inside the drive assembly. The inner ring of the bearing sleeve 5 is sleeved on the positioning part 4, and the bearing sleeve 5 can rotate relative to the positioning part 4. The rotor 3 is sleeved on the outer ring of the bearing sleeve 5, and the inner ring of the rotor 3 and the outer ring of the bearing sleeve 5 form a liquid passage gap. The bearing sleeve 5 has a drain part that communicates with the liquid passage gap. The drain part passes through both ends of the outer wall of the outer ring of the bearing sleeve 5 along the axial direction of the bearing sleeve 5, so that the coolant in the liquid passage gap can be discharged from the drain part.
[0035] This application enables the positioning of the bearing sleeve 5 by means of the positioning part 4 formed at the center position inside the drive assembly. Furthermore, since the bearing sleeve 5 in this application can rotate relative to the positioning part 4, it can drive the rotor 3 to rotate stably relative to the stator 2.
[0036] It is understood that the positioning part 4 in this application is a positioning shaft. Since the bearing sleeve 5 in this application can rotate relative to the positioning shaft, the bearing sleeve 5 can be integrally injection molded with the rotor 3 to form an integrated structure, making the connection between the two more reliable and ensuring operational stability. Furthermore, the drain section formed through the outer wall of the bearing sleeve 5, which extends axially through both ends of the outer ring of the bearing sleeve 5, allows for better drainage of the coolant.
[0037] In alternative implementations, such as Figure 2 Combination Figure 3 As shown, there are multiple drainage sections in this application, which are evenly distributed along the circumference of the bearing sleeve 5.
[0038] Preferably, there are three drainage sections in this application, which are evenly distributed along the circumference of the outer ring of the bearing sleeve 5, thereby ensuring that the bearing sleeve 5 is subjected to uniform force and ensuring the stability of the rotor 3 rotation.
[0039] In alternative implementations, such as Figure 2 Combination Figure 3As shown, the multiple drainage parts in this application are all drainage grooves 501, and the drainage grooves 501 extend along the axial direction of the bearing sleeve 5 and penetrate through both ends of the outer wall surface of the outer ring of the bearing sleeve 5 along the axial direction of the bearing sleeve 5.
[0040] This application Figure 2 and Figure 3 The invention provides a drain trough 501 structure that is easy to process and has direct guiding capability. In this embodiment, the drain trough 501 extends along the axial direction of the bearing sleeve 5 and is a straight groove structure, thereby enabling the rapid discharge of coolant from one end to the other.
[0041] In an optional embodiment, this application further provides another structure for the drain trough 501, namely, the drain trough 501 is a spiral structure, the direction of rotation of the drain trough 501 is the same as the direction of rotation of the rotor 3, and the drain trough 501 can penetrate the outer wall surface of the outer ring of the bearing sleeve 5 at both ends in the axial direction.
[0042] In this method, since the spiral drainage groove 501 can also pass through both ends of the bearing sleeve 5 in the axial direction, it can also guide the coolant and make the coolant flow from the bottom to the top of the bearing sleeve 5, thereby realizing the discharge of the coolant.
[0043] It should be noted that, since the bearing sleeve 5 and the rotor 3 are an integral structure in this application, they rotate synchronously. Therefore, in this embodiment, the spiral direction of the drain groove 501 needs to be consistent with the rotation direction of the rotor 3 in order to ensure the smooth discharge of coolant.
[0044] In alternative implementations, such as Figure 1 As shown, the drive assembly provided in this application also includes a housing 1, which has a first receiving cavity and a second receiving cavity. The stator 2 is disposed in the first receiving cavity, the positioning part 4 is located at the center of the second receiving cavity, and the bearing sleeve 5 and the rotor 3 are both located in the second receiving cavity, with the rotor 3 corresponding to the stator 2.
[0045] The housing 1 provides a stable installation space for the stator 2 and rotor 3, thereby ensuring the service life of the overall electric water pump.
[0046] In alternative implementations, such as Figure 1 As shown, the electric water pump provided in this application also includes a water pump volute 7, which is sealed to the housing 1 to form a flow guide cavity 701, and an impeller 6 is located in the flow guide cavity 701. The water pump volute 7 has an inlet channel and a outlet channel that are connected to the flow guide cavity 701. The impeller 6 draws coolant into the flow guide cavity 701 through the inlet channel and guides the coolant to the outlet channel.
[0047] In alternative implementations, such as Figure 1As shown, the electric water pump provided in this application also includes a rear cover 8 and a controller assembly 9. The rear cover 8 is sealed to the housing 1 to form a sealed cavity 801, and the controller assembly 9 is disposed in the sealed cavity 801.
[0048] Accordingly, the electric water pump provided in this application also includes a first sealing ring and a second sealing ring. The water pump volute 7 is sealed to the housing 1 through the first sealing ring, and the rear cover 8 is sealed to the housing 1 through the second sealing ring.
[0049] The first sealing ring achieves a sealed connection between the housing 1 and the water pump volute 7. Since the water pump volute 7 has an inlet channel and a outlet channel, external coolant can enter the guide cavity 701 formed by the water pump volute 7 and the housing 1. After being guided and pressurized by the impeller 6, it is discharged through the outlet channel, thus realizing the function of an electric water pump.
[0050] The second sealing ring achieves a sealed connection between the housing 1 and the rear cover 8. Since a sealing cavity 801 is formed, the controller assembly 9 can be stably installed.
[0051] Accordingly, since the coolant in this application passes through the gap between the stator 2 and the rotor 3, and before entering the liquid passage gap, it also passes through the corresponding position of the sealing cavity 801 in the second receiving cavity, it will not only absorb the heat generated by the stator 2, but also absorb the heat generated by the controller assembly 9. After that, the coolant is pressurized into the drain tank 501, and under the action of pressure, it returns to the low-pressure area at the center of the impeller 6, and is finally discharged under the guidance of the impeller 6, thus realizing the heat dissipation function of the stator 2 and the controller assembly 9.
[0052] It should be further explained here that, since there is also a gap between the bearing sleeve 5 and the positioning part 4, the coolant will also enter the gap between the bearing sleeve 5 and the positioning part 4 during actual operation. However, since the drain groove 501 in this application is formed on the outer ring of the bearing sleeve 5, the coolant in the gap between the bearing sleeve 5 and the positioning part 4 will not be discharged. This part of the coolant can also form a water film to protect the bearing sleeve 5 and the positioning part 4, thereby improving the service life and stable operation of the electric water pump.
[0053] In addition, this utility model provides a vehicle that includes an electric water pump according to any of the foregoing embodiments.
[0054] Vehicles using the electric water pump provided in this application have a longer service life because the electric water pump operates more stably, does not generate heat accumulation, and does not damage the water film between the bearing sleeve 5 and the positioning part 4. This reduces the overall maintenance cost of the vehicle and improves the user experience.
[0055] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An electric water pump characterized by comprising: The drive assembly, the bearing sleeve and the positioning part are included. The drive assembly includes a stator and a rotor, the positioning part is formed at the center of the drive assembly, the inner ring of the bearing sleeve is sleeved on the positioning part and can rotate relative to the positioning part, the rotor is sleeved on the outer ring of the bearing sleeve, and the inner ring of the rotor and the outer ring of the bearing sleeve form a liquid gap, the bearing sleeve is formed with a liquid discharge part in communication with the liquid gap, and the liquid discharge part penetrates the outer wall of the outer ring of the bearing sleeve at both ends in the axial direction of the bearing sleeve, so that the cooling liquid in the liquid gap can be discharged by the liquid discharge part.
2. The electric water pump of claim 1, wherein The liquid discharge part is a plurality of liquid discharge grooves, and the liquid discharge grooves are uniformly distributed in the circumferential direction of the bearing sleeve.
3. The electric water pump of claim 1, wherein The liquid discharge part is a liquid discharge groove, and the liquid discharge groove extends in the axial direction of the bearing sleeve and penetrates the outer wall surface of the outer ring of the bearing sleeve at both ends in the axial direction of the bearing sleeve.
4. The electric water pump of claim 2, wherein, The liquid discharge part is a plurality of liquid discharge grooves, and the liquid discharge grooves are helical structures, the rotation direction of the liquid discharge grooves is the same as that of the rotor, and the liquid discharge grooves can penetrate the outer wall surface of the outer ring of the bearing sleeve at both ends in the axial direction.
5. The electric water pump of claim 1, wherein, The drive assembly further includes a housing, the housing is formed with a first accommodating cavity and a second accommodating cavity, the stator is arranged in the first accommodating cavity, the positioning part is located at the center of the second accommodating cavity, and the bearing sleeve and the rotor are located in the second accommodating cavity, and the rotor corresponds to the stator.
6. The electric water pump of claim 5, wherein Further comprising an impeller connected with the rotor.
7. The electric water pump of claim 6, wherein Further comprising a water pump volute sealingly connected with the housing to form a flow guide cavity, and the impeller is located in the flow guide cavity. The water pump volute is formed with a liquid inlet channel and a liquid discharge channel in communication with the flow guide cavity, the impeller sucks the cooling liquid from the liquid inlet channel into the flow guide cavity, and guides the cooling liquid to the liquid discharge channel.
8. The electric water pump of claim 7, wherein Further comprising a rear cover and a controller assembly, the rear cover is sealingly connected with the housing to form a sealed cavity, and the controller assembly is arranged in the sealed cavity.
9. The electric water pump of claim 8, wherein, Further comprising a first sealing ring and a second sealing ring, the water pump volute is sealingly connected with the housing through the first sealing ring, and the rear cover is sealingly connected with the housing through the second sealing ring.
10. A vehicle characterized by comprising: The electric water pump includes any one of claims 1-9.