Electronic oil pump and vehicle

Abstract

The utility model provides an electronic oil pump and a vehicle, and the electronic oil pump comprises a pump shell which is provided with a flow inlet, a first cavity and a second cavity; the electric control board is arranged in the second cavity; the isolation plate is in sealed connection with the inner wall of the pump shell so as to isolate the first cavity from the second cavity; one part of the heat conduction assembly is arranged between the electric control board and the isolation board and connected with the electric control board in a heat conduction mode, the other part of the heat conduction assembly is embedded in the isolation board, and the side, away from the electric control board, of the heat conduction assembly is exposed out of the first cavity; the pump shaft is rotatably arranged on the pump shell and located in the first cavity, one end of the pump shaft communicates with the flow inlet, and the other end of the pump shaft communicates with the first cavity; the pump shaft is sleeved with the driving assembly, the driving assembly is electrically connected with the electric control board, and the driving assembly is used for driving fluid to flow into the first cavity from the fluid inlet through the pump shaft, so that the fluid exchanges heat with at least part of the driving assembly and exchanges heat with the electric control board through the heat conduction assembly. Heat exchange is conducted on the electric control board through the fluid and the heat conduction assembly, and the heat dissipation effect of the electric control board can be improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an electronic oil pump and a vehicle. Background Technology

[0002] In related technologies, finned heat sinks are typically used to dissipate heat from the electronic control board of an electronic oil pump. However, the heat dissipation capacity of finned heat sinks is greatly affected by ambient temperature and airflow conditions. Due to the relatively high power of electronic oil pumps and their relatively enclosed internal space, finned heat sinks cannot fully exert their heat dissipation function, resulting in poor heat dissipation of the electronic control board. Therefore, how to improve the heat dissipation effect of the electronic control board of an electronic oil pump is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0003] In view of the above problems, this application provides an electronic oil pump and a vehicle to improve the heat dissipation effect of the electronic control board of the electronic oil pump.

[0004] To solve the above-mentioned technical problems, the technical solution adopted in this application is conceived as follows:

[0005] In a first aspect, this application provides an electronic oil pump, comprising: a pump housing having an inlet, a first cavity, and a second cavity; an electronic control board disposed within the second cavity; an isolation plate sealed to the inner wall of the pump housing to isolate the first cavity from the second cavity; a heat-conducting component, partly disposed between the electronic control board and the isolation plate and thermally connected to the electronic control board, and the other part embedded within the isolation plate, with the side away from the electronic control board exposed in the first cavity; a pump shaft rotatably disposed in the pump housing and located within the first cavity, one end of the pump shaft connected to the inlet and the other end connected to the first cavity; and a drive assembly sleeved outside the pump shaft and electrically connected to the electronic control board, the drive assembly being used to drive fluid from the inlet through the pump shaft into the first cavity, so that the fluid exchanges heat with at least a portion of the drive assembly and with the electronic control board through the heat-conducting component.

[0006] In some embodiments, the electronic oil pump further includes a temperature sensing component electrically connected to an electronic control board. The temperature sensing component is used to detect the temperature of the electronic control board, and the electronic control board is used to control the rotational speed of the drive component in response to the temperature detected by the temperature sensing component, thereby controlling the flow rate of the fluid flowing into the first cavity via the pump shaft.

[0007] In some embodiments, the other end of the pump shaft is positioned opposite and spaced apart from the heat-conducting component.

[0008] In some embodiments, the heat-conducting component includes: a first heat-conducting element embedded in an isolation plate, the side of the first heat-conducting element away from the control board being exposed in the first cavity, and the side of the first heat-conducting element near the control board being flush with the side of the isolation plate near the control board; and a second heat-conducting element disposed between the isolation plate and the control board, with at least a portion of the second heat-conducting element in contact with the first heat-conducting element, wherein fluid flowing into the first cavity exchanges heat with the control board through the first heat-conducting element and the second heat-conducting element.

[0009] In some embodiments, the second thermal conductive element includes a thermal pad, thermally conductive silicone, or thermally conductive grease.

[0010] In some embodiments, the electronic oil pump further includes a first seal, which is disposed on the end face of the isolation plate facing the inner wall of the pump housing and is arranged circumferentially around the isolation plate.

[0011] In some embodiments, the drive assembly includes a first drive assembly and a second drive assembly; the first cavity includes a first motor chamber and a second motor chamber; the pump housing includes: a first end cap having an inlet; a first housing connected to the end of the first end cap away from the inlet, the first housing having a first motor chamber communicating with the inlet; and a second housing connected to the end of the first housing away from the first end cap, the second housing having a second motor chamber; wherein one end of the pump shaft is rotatably disposed at the bottom of the first end cap, and the other end extends through the first motor chamber into the second motor chamber; the first drive assembly is disposed in the first motor chamber and sleeved outside the pump shaft, and the second drive assembly is disposed in the second motor chamber and sleeved outside the pump shaft, the pump shaft being used to drive the first drive assembly to rotate under the drive of the second drive assembly, so that fluid flows from the inlet through the pump shaft into the second motor chamber and exchanges heat with the second drive assembly and the electronic control board.

[0012] In some embodiments, the first end cap further forms an outlet, the first motor chamber includes a first sub-cavity communicating with the inlet and a second sub-cavity communicating with the outlet, the first housing includes a bottom plate for isolating the first motor chamber and the second motor chamber, the bottom plate forms an opening, and the second motor chamber, the opening, the first sub-cavity and the second sub-cavity are sequentially connected; wherein, the first drive assembly and the second drive assembly are further used to drive fluid from the second motor chamber through the opening, the first sub-cavity and the second sub-cavity sequentially, and pump it out from the outlet.

[0013] In some embodiments, the base plate is provided with a guide post extending into the second motor chamber, the guide post connecting the first motor chamber and the second motor chamber, the pump shaft passing through the guide post and being rotatably connected to the guide post.

[0014] Secondly, this application provides a vehicle that includes the aforementioned electronic oil pump.

[0015] The beneficial effects of the embodiments of this application are as follows: This application provides an electronic oil pump and a vehicle. The electronic oil pump includes a pump housing, an electronic control board, an isolation plate, a heat-conducting component, a pump shaft, and a drive component. The pump housing forms an inlet, a first cavity, and a second cavity. The electronic control board is disposed in the second cavity. The isolation plate is sealed to the inner wall of the pump housing to isolate the first cavity from the second cavity. A portion of the heat-conducting component is disposed between the electronic control board and the isolation plate and is thermally connected to the electronic control board. Another portion is embedded in the isolation plate, and the side away from the electronic control board is exposed in the first cavity. The pump shaft is rotatably disposed in the pump housing and located in the first cavity. One end of the pump shaft is connected to the inlet, and the other end is connected to the first cavity. The drive component is sleeved on the outside of the pump shaft and electrically connected to the electronic control board. The drive component is used to drive fluid from the inlet through the pump shaft into the first cavity so that the fluid exchanges heat with at least a portion of the drive component and with the electronic control board through the heat-conducting component. By sealing the isolation plate to the inner wall of the pump casing to isolate the first chamber and the second chamber, and embedding part of the heat-conducting component, which is thermally connected to the electronic control board, in the isolation plate, with the side of the heat-conducting component away from the electronic control board exposed in the first chamber, the heat on the electronic control board can be transferred to the first chamber through the heat-conducting component. Simultaneously, one end of the pump shaft is connected to the inlet, and the other end is connected to the first chamber. The drive component, sleeved outside the pump shaft, can drive the fluid from the inlet into the first chamber through the pump shaft, so that heat exchange occurs between the heat-conducting component and the electronic control board. This allows the fluid flowing into the first chamber through the pump shaft to fall onto the... The fluid exchanges heat with the heat-conducting components on the isolation plate and heat-conducting components, thereby exchanging heat with the electronic control board through the fluid and heat-conducting components. The fluid flows directly into the first cavity through the inlet and pump shaft without passing through the drive components, which can reduce the influence of the drive components on the temperature of the fluid and improve the heat exchange effect of the fluid on the electronic control board, thereby improving the heat dissipation effect of the electronic control board. On the other hand, through heat exchange between the fluid and the electronic control board, the heat absorption capacity of the fluid is not affected by environmental factors and air flow conditions, and can stably absorb the heat of the electronic control board, so as to reduce the temperature of the electronic control board and further improve the heat dissipation effect of the electronic control board. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0017] Figure 1 This is a schematic diagram of an embodiment of the electronic oil pump provided in this application;

[0018] Figure 2 This is a cross-sectional view of an embodiment of the electronic oil pump provided in this application;

[0019] Figure 3 This is a schematic diagram of the fluid flow trajectory when the electronic oil pump provided in this application is working.

[0020] The reference numerals in the detailed embodiments are as follows:

[0021] Electronic oil pump 100, pump shaft 100a, pump housing 10, first chamber 10a, second chamber 10b, first end cover 11, inlet 111, outlet 112, buffer chamber 113, first inlet 114, second inlet 115, first housing 12, first motor chamber 121, first sub-chamber 121a, second sub-chamber 121b, base plate 122, opening 1221, guide post 1222, second housing 13, second motor chamber 131, second... Flange 132, second end cap 14, first flange 141, connecting part 142, electrical control board 20, component 21, filter 30, isolation plate 40, heat conduction assembly 50, first heat conduction component 51, second heat conduction component 52, drive assembly 60, first drive assembly 61, first rotor 611, second rotor 612, hydraulic chamber 61a, second drive assembly 62, third rotor 621, stator 622, first seal 71, second seal 72. Detailed Implementation

[0022] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0026] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0027] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0028] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 heat exchange medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0029] Please see Figures 1 to 2 , Figure 1 This is a schematic diagram of an embodiment of the electronic oil pump provided in this application; Figure 2This is a cross-sectional view of an embodiment of the electronic fuel pump provided in this application. One aspect of this application provides an electronic fuel pump 100. The electronic fuel pump 100 can be used in a vehicle. The vehicle can be a new energy vehicle, which can be a sedan, van, bus, etc., but is not limited thereto. The vehicle can also be a vehicle with other transmission internal combustion engine, fuel vehicle, or hybrid vehicle, but is not limited thereto. The electronic fuel pump 100 includes a pump housing 10, an electronic control board 20, an isolation plate 40, a heat-conducting component 50, a pump shaft 100a, and a drive component 60. The pump housing 10 serves as the basic carrier of the electronic fuel pump 100, providing support and protection for components such as the electronic control board 20, isolation plate 40, heat-conducting component 50, pump shaft 100a, and drive component 60, preventing these components from being physically damaged or affected by environmental factors. Simultaneously, the pump housing 10 forms a relatively enclosed space to allow the drive component 60 to effectively draw in and pump out fluid. The fluid pumped from the electronic fuel pump 100 can flow into the vehicle's fuel supply line to provide necessary fuel support for the vehicle's engine. The fluid can be hydraulic oil. For example, HL type hydraulic oil, HM type hydraulic oil, HG type hydraulic oil, HV low temperature hydraulic oil, HS high temperature hydraulic oil, or HR synthetic hydraulic oil, but not limited to these.

[0030] The pump housing 10 has an inlet 111, a first cavity 10a, and a second cavity 10b. An isolation plate 40 is sealed to the inner wall of the pump housing 10 to isolate the first cavity 10a from the second cavity 10b. A portion of the heat-conducting assembly 50 is disposed between the control board 20 and the isolation plate 40 and is thermally connected to the control board 20; the other portion is embedded within the isolation plate 40, with its side away from the control board 20 exposed in the first cavity 10a. A pump shaft 100a is rotatably mounted on the pump housing 10 and located within the first cavity 10a. One end of the pump shaft 100a is connected to the inlet 111, and the other end is connected to the first cavity 10a. A drive assembly 60 is sleeved around the pump shaft 100a and is electrically connected to the control board 20. The drive assembly 60 is used to drive fluid from the inlet 111 into the first cavity 10a via the pump shaft 100a, so that the fluid exchanges heat with at least part of the drive assembly 60 and with the control board 20 through the heat conduction assembly 50.

[0031] By sealing the isolation plate 40 with the inner wall of the pump housing 10 to isolate the first cavity 10a and the second cavity 10b, fluid flowing into the first cavity 10a via the pump shaft 100a can be prevented from flowing into the second cavity 10b through the gap between the isolation plate 40 and the inner wall of the pump housing 10. There is no need to set a protective layer on the surface of the electronic control board 20, that is, there is no need to waterproof or dustproof the electronic control board 20. This not only reduces the manufacturing process of the electronic oil pump 100 and saves production time to improve the assembly process, but also reduces material costs.

[0032] The drive assembly 60 is located inside the first cavity 10a. The isolation plate 40 can be spaced apart from the drive assembly 60 to avoid damage to the isolation plate 40 and the second drive assembly 62 due to interference between the isolation plate 40 and the second drive assembly 62 when the electronic oil pump 100 is working, so that the second drive assembly 62 can work stably.

[0033] The heat-conducting component 50 has two parts that are in contact with each other. One part is located between the control board 20 and the isolation plate 40, and the other part is embedded in the isolation plate 40. The part of the heat-conducting component 50 located between the control board 20 and the isolation plate 40 is in contact with the control board 20 on the side facing the control board 20 for thermal connection. The part of the heat-conducting component 50 embedded in the isolation plate 40 is exposed in the first cavity 10a on the side away from the control board 20.

[0034] The fluid flowing into the electronic oil pump 100 through the inlet 111 has a relatively low temperature, which can be used to cool down the heat-generating components inside the electronic oil pump 100. One end of the pump shaft 100a is connected to the inlet 111, and the other end of the pump shaft 100a is connected to the first cavity 10a, so that the fluid flowing into the first cavity 10a through the pump shaft 100a can flow onto the isolation plate 40 and the heat-conducting component 50, and exchange heat with the electronic control board 20 through the heat-conducting component 50. The fluid flows directly into the first cavity 10a through the inlet 111 and the pump shaft 100a without passing through the drive component 60, which can reduce the influence of the drive component 60 on the temperature of the fluid, thereby improving the heat exchange effect of the fluid on the electronic control board 20, and thus improving the heat dissipation effect of the electronic control board 20. In addition, the fluid can pass through or immerse the drive component 60 and cool the drive component 60, which can prevent the material of the drive component 60 from deforming or being damaged due to high temperature, thereby effectively improving the service life of the drive component 60.

[0035] By sealing the isolation plate 40 to the inner wall of the pump housing 10 to isolate the first cavity 10a and the second cavity 10b, and embedding the heat-conducting component 50, which is thermally connected to the control board 20, in the isolation plate 40, with the side of the heat-conducting component 50 away from the control board 20 exposed in the first cavity 10a, the heat on the control board 20 can be transferred to the first cavity 10a through the heat-conducting component 50. At the same time, one end of the pump shaft 100a is connected to the inlet 111, and the other end is connected to the first cavity 10a. The drive component 60, which is sleeved outside the pump shaft 100a, can drive the fluid to flow from the inlet 111 into the first cavity 10a through the pump shaft 100a, so as to exchange heat with the control board 20 through the heat-conducting component 50. On the one hand, the fluid flowing into the first cavity 10a through the pump shaft 100a... The fluid in the first cavity 10a can fall onto the isolation plate 40 and the heat-conducting component 50 to exchange heat with the heat-conducting component 50, thereby exchanging heat with the control board 20 through the fluid and the heat-conducting component 50. Moreover, the fluid flows directly into the first cavity 10a through the inlet 111 and the pump shaft 100a without passing through the drive component 60, which can reduce the influence of the drive component 60 on the temperature of the fluid and improve the heat exchange effect of the fluid on the control board 20, thereby improving the heat dissipation effect of the control board 20. On the other hand, through the heat exchange between the fluid and the control board 20, the heat absorption capacity of the fluid is not affected by environmental factors and air flow conditions, and can stably absorb the heat of the control board 20, so as to reduce the temperature of the control board 20 and further improve the heat dissipation effect of the control board 20.

[0036] In addition, since the fluid has a good heat dissipation effect on the control board 20, it can reduce the damage of high temperature to the components 21 on the control board 20, slow down the aging rate of the components 21 on the control board 20, thereby extending the service life of the components 21 and reducing the maintenance cost of the electronic oil pump 100. Furthermore, in terms of the selection of components 21, lower-cost components such as high resistance and low temperature resistance can be selected. For example, lower-cost MOSFETs, main control chips, electrolytic capacitors and inductors with high resistance and low temperature resistance can be selected, but not limited to these, which can reduce the overall production cost of the electronic oil pump 100.

[0037] In some embodiments, the electronic oil pump 100 further includes a temperature sensing component (not shown). The temperature sensing component is electrically connected to the electronic control board 20. The temperature sensing component is used to detect the temperature of the electronic control board 20, and the electronic control board 20 is used to control the rotational speed of the drive component 60 in response to the detected temperature of the temperature sensing component, thereby controlling the flow rate of the fluid flowing into the first cavity 10a via the pump shaft 100a.

[0038] When the temperature sensing component detects that the temperature of the electronic control board 20 is high, the electronic control board 20 controls the drive component 60 to increase its rotation speed, thereby increasing the flow rate of the fluid flowing into the first cavity 10a via the pump shaft 100a. When the temperature sensing component detects that the temperature of the electronic control board 20 is low, the electronic control board 20 controls the drive component 60 to decrease its rotation speed, thereby reducing the flow rate of the fluid flowing into the first cavity 10a via the pump shaft 100a. This achieves precise temperature control of the electronic control board 20 by controlling the flow rate of the fluid flowing into the first cavity 10a according to the temperature of the electronic control board 20, enabling the electronic control board 20 to operate within its optimal temperature range. This not only avoids performance degradation or damage to the components 21 on the electronic control board 20 due to excessive temperature, but also provides just the right fluid supply, thus saving energy.

[0039] In some embodiments, the other end of the pump shaft 100a is opposite to and spaced apart from the heat-conducting component 50.

[0040] By positioning the other end of the pump shaft 100a away from the inlet 111 opposite to and spaced apart from the heat-conducting component 50, the fluid can directly flow from the inlet 111 onto the heat-conducting component 50 via the pump shaft 100a under the drive of the drive component 60. This allows the fluid to exchange heat with the control board 20 through the heat-conducting component 50. This not only shortens the flow path of the fluid from the other end of the pump shaft 100a to the heat-conducting component 50, thereby improving the heat dissipation efficiency of the control board 20, but also reduces the influence of the temperature of the drive component 60 and the ambient temperature within the first cavity 10a on the fluid temperature, thus improving the heat exchange effect between the fluid and the control board 20, further enhancing the heat dissipation effect of the control board 20.

[0041] In some embodiments, the heat-conducting assembly 50 includes a first heat-conducting element 51 and a second heat-conducting element 52. The first heat-conducting element 51 is embedded within the isolation plate 40. The side of the first heat-conducting element 51 away from the control board 20 is exposed in the first cavity 10a. The side of the first heat-conducting element 51 near the control board 20 is flush with the side of the isolation plate 40 near the control board 20. The second heat-conducting element 52 is disposed between the isolation plate 40 and the control board 20, and at least a portion of the second heat-conducting element 52 is in contact with the first heat-conducting element 51. Fluid flowing into the first cavity 10a exchanges heat with the control board 20 through the first heat-conducting element 51 and the second heat-conducting element 52.

[0042] The first heat-conducting element 51 and the second heat-conducting element 52 are arranged opposite to each other to improve the heat conduction effect of the heat-conducting assembly 50. The area of ​​the first heat-conducting element 51 along the axial direction perpendicular to the pump shaft 100a can be equal to the area of ​​the second heat-conducting element 52 along the axial direction perpendicular to the pump shaft 100a; or the area of ​​the second heat-conducting element 52 along the axial direction perpendicular to the pump shaft 100a can be greater than the area of ​​the first heat-conducting element 51 along the axial direction perpendicular to the pump shaft 100a. That is, the orthogonal projection of the first heat-conducting element 51 toward the electronic control board 20 falls completely on the second heat-conducting element 52, so as to ensure that the second heat-conducting element 52 can transfer the cold energy of the first heat-conducting element 51 to the electronic control board 20 as much as possible or completely, avoid the loss of cold energy on the first heat-conducting element 51, thereby improving the heat dissipation efficiency and heat dissipation effect of the electronic control board 20.

[0043] In some embodiments, the second thermal conductive element 52 includes a thermal pad, thermally conductive silicone, or thermally conductive grease.

[0044] The thermal pad can be a soft silicone thermal pad, a rubber thermal pad, an asbestos thermal pad, or a polytetrafluoroethylene (PTFE) thermal pad, but is not limited to these.

[0045] In some embodiments, the first heat-conducting element 51 may be a metal heat-conducting element. For example, the first heat-conducting element 51 may be a silver heat-conducting element, a copper heat-conducting element, an aluminum heat-conducting element, a brass heat-conducting element, etc., but is not limited thereto.

[0046] Thermal pads, thermally conductive silicone, and thermally conductive grease all possess high thermal conductivity, enabling the second thermally conductive element 52 to increase the coupling between the first thermally conductive element 51 and the electronic control board 20. This allows for more effective transfer of the fluid's cooling capacity to the electronic control board 20, thereby improving its heat dissipation. Furthermore, the second thermally conductive element 52 is made of insulating material, preventing short circuits between the first thermally conductive element 51 and the electronic control board 20, thus enhancing the reliability of the electronic oil pump 100.

[0047] In some embodiments, the electric oil pump 100 further includes a first seal 71. The first seal 71 is disposed on the end face of the isolation plate 40 facing the inner wall of the pump housing 10 and is arranged circumferentially around the isolation plate 40.

[0048] The first seal 71 is used to abut against the inner wall of the pump housing 10 to achieve a sealed connection between the isolation plate 40 and the inner wall of the first cavity 10a. The first seal 71 can be an annular elastic seal. The first seal 71 can be made of rubber, silicone, sponge, or wool felt, but is not limited to these. Rubber, silicone, sponge, and wool felt all have good elasticity and long service life. The elasticity of the first seal 71 serves two purposes: firstly, it acts as a buffer for the pump housing 10, preventing damage or cracking of the pump housing 10 due to friction between the isolation plate 40 and the pump housing 10; secondly, the first seal 71 enhances the sealing effect between the isolation plate 40 and the inner wall of the pump housing 10, preventing fluid flowing into the first cavity 10a from flowing into the second cavity 10b through the space between the isolation plate 40 and the inner wall of the pump housing 10, thus preventing corrosion of the electronic control board 20.

[0049] In some embodiments, the pump housing 10 includes a first end cap 11, a first housing 12, and a second housing 13. The first end cap 11 has an inlet 111, the first housing 12 is connected to the end of the first end cap 11 away from the inlet 111, and the second housing 13 is connected to the end of the first housing 12 away from the first end cap 11. The first end cap 11 and the first housing 12, as well as the first housing 12 and the second housing 13, can be fixedly connected together by means of bolts, screws, or snap-fit ​​connections, but are not limited to these methods.

[0050] In some embodiments, the pump housing 10 further includes a second end cap 14. The second end cap 14 covers the end of the second housing 13 away from the first housing 12. A second cavity 10b is formed in the second end cap 14, and an electronic control board 20 is disposed in the second cavity 10b. The second end cap 14 and the second housing 13 can be fixedly connected together by means of bolts, screws, or snap-fit ​​connections, but are not limited thereto.

[0051] In some embodiments, the second end cap 14 includes a first flange portion 141 and a connecting portion 142. The first flange portion 141 extends from the edge of the second end cap 14 toward the direction away from the second cavity 10b and is circumferentially disposed around the second end cap 14. The connecting portion 142 is disposed on the side of the first flange portion 141 near the second cavity 10b and extends toward the second housing 13, and is inserted into the second housing 13. The end of the second housing 13 away from the first housing 12 abuts against the side of the first flange portion 141 away from the second cavity 10b, and the inner wall of the second housing 13 abuts against the outer wall of the connecting portion 142.

[0052] In some embodiments, the electronic oil pump 100 further includes a second seal 72. The second seal 72 is disposed on the side of the connecting portion 142 facing away from the second cavity 10b and is arranged circumferentially around the connecting portion 142. The second seal 72 is used to abut against the inner wall of the second housing 13 to improve the sealing performance of the connection between the second end cap 14 and the second housing 13. The second seal 72 can be an annular elastic seal. The second seal 72 can be made of rubber, silicone, sponge, or wool felt, but is not limited to these. The second seal 72 is elastic. On the one hand, the second seal 72 acts as a buffer for the second housing 13, which can avoid the risk of damage or cracking of the second housing 13 due to friction between the connecting portion 142 and the second housing 13; on the other hand, the arrangement of the second seal 72 can enhance the sealing effect between the second housing 13 and the second end cap 14, and prevent the fluid flowing into the second housing 13 from flowing into the second cavity 10b from between the second housing 13 and the second end cap 14, which could corrode the electronic control board 20 or leak to the outside of the electronic oil pump 100.

[0053] In some embodiments, the second end cap 14 and the second housing 13 can be connected by threads. For example, the connecting portion 142 has an external thread on the side facing away from the second cavity 10b, and the inner surface of the end of the second housing 13 away from the first housing 12 has an internal thread that mates with the external thread of the connecting portion 142. The second end cap 14 and the second housing 13 are screwed together by the internal and external threads to form an integral unit.

[0054] In some embodiments, the second housing 13 includes a second flange portion 132, which is located at the end of the second housing 13 away from the first housing 12. When the connecting portion 142 of the second end cap 14 is inserted into the second housing 13, the second flange portion 132 of the second housing 13 can fit against the first flange portion 141 of the second end cap 14. The second flange portion 132 and the first flange portion 141 can be connected by means of bolts, rivets, or snap-fit ​​connections, but are not limited thereto.

[0055] The drive assembly 60 includes a first drive assembly 61 and a second drive assembly 62. The first cavity 10a includes a first motor chamber 121 and a second motor chamber 131. The first motor chamber 121 is formed in the first housing 12 and communicates with the inlet 111. The second motor chamber 131 is formed in the second housing 13. One end of the pump shaft 100a is rotatably disposed at the bottom of the first end cover 11, and the other end extends through the first motor chamber 121 into the second motor chamber 131. The first drive assembly 61 is disposed in the first motor chamber 121 and sleeved on the outside of the pump shaft 100a. The second drive assembly 62 is located inside the second motor chamber 131 and sleeved outside the pump shaft 100a. The pump shaft 100a is used to drive the first drive assembly 61 to rotate under the drive of the second drive assembly 62, so that fluid flows from the inlet 111 through the pump shaft 100a into the second motor chamber 131 and exchanges heat with the second drive assembly 62 and the electronic control board 20.

[0056] During the manufacturing process of the electronic oil pump 100, the second drive assembly 62 can be fixed inside the second housing 13 by means of heat fitting. That is, the second housing 13 is heated to expand it, and then the second drive assembly 62 is pressed into the second motor chamber 131 of the second housing 13. After the second housing 13 cools and shrinks, the second drive assembly 62 and the second housing 13 can fit tightly together, thereby completing the assembly of the second drive assembly 62. The second drive assembly 62 is fixed inside the second housing 13 by a heat fitting. On the one hand, this can significantly improve the assembly efficiency of the second drive assembly 62 and effectively position the second drive assembly 62, ensuring the coaxiality between the second drive assembly 62 and the second housing 13, preventing the second drive assembly 62 from tilting relative to the axis of the second housing 13, thereby improving the coaxiality between the second drive assembly 62 and the first drive assembly 61. On the other hand, the second housing 13 will generate a certain clamping force on the second drive assembly 62. This clamping force can ensure that the second drive assembly 62 is fixed in position inside the second housing 13, preventing the second drive assembly 62 from shifting during transportation or operation of the electronic oil pump 100, thereby ensuring the normal operation of the electronic oil pump 100.

[0057] In some embodiments, the first drive assembly 61 includes a first rotor 611 and a second rotor 612. The first rotor 611 is sleeved outside the pump shaft 100a for transmission connection with the pump shaft 100a. The second rotor 612 is sleeved outside the first rotor 611. The first rotor 611 includes a plurality of external teeth, and the second rotor 612 includes a plurality of internal teeth adapted to the external teeth of the first rotor 611. The plurality of external teeth and the plurality of internal teeth are in clearance engagement, and there is a certain eccentricity between the first rotor 611 and the second rotor 612 to form a hydraulic chamber 61a between the first rotor 611 and the second rotor 612.

[0058] The first rotor 611 and the second rotor 612 can be plastic rotors. The first rotor 611 and the second rotor 612 can be integrally formed by injection molding, extrusion molding, milling, turning, etc., but are not limited to these methods. The material of the first rotor 611 and the second rotor 612 can be selected from thermosetting materials, polyetheretherketone (PEEK), polycarbonate (PC), or polyetherimide (PEI), etc., but are not limited to these methods. Using plastic rotors for the first rotor 611 and the second rotor 612 not only reduces the overall weight of the electronic oil pump 100, but also improves the rotational efficiency of the first rotor 611 and the second rotor 612. At the same time, plastic rotors have good wear resistance, which can extend the service life of the electronic oil pump 100 to a certain extent.

[0059] The second drive assembly 62 includes a third rotor 621 and a stator 622. The third rotor 621 is sleeved outside the pump shaft 100a for drive connection with the pump shaft 100a. The stator 622 is sleeved outside the third rotor 621.

[0060] Please also refer to Figure 3 , Figure 3 This is a schematic diagram of the fluid flow trajectory during the operation of the electronic oil pump provided in this application. When the electronic oil pump 100 is working, the electronic control board 20 controls the current in the coil of the stator 622 to change according to a predetermined pattern, thereby controlling the stator 622 to generate a changing excitation magnetic field. The third rotor 621 rotates under the action of the excitation magnetic field. When the third rotor 621 rotates, it can drive the pump shaft 100a to rotate, and through the pump shaft 100a, it drives the first rotor 611 to rotate. Since there is a certain eccentricity between the first rotor 611 and the second rotor 612, when the first rotor 611 rotates, some of the external teeth of the first rotor 611 mesh with some of the internal teeth of the second rotor 612, thereby driving the second rotor 612 to rotate. During the rotation of the first rotor 611 and the second rotor 612, the pressure in the hydraulic chamber 61a between the first rotor 611 and the second rotor 612 changes, which can drive the fluid to enter the inlet 111. At the same time, under the action of the second drive assembly 62, it flows into the pump shaft 100a and flows into the second motor chamber 131 along the pump shaft 100a. The fluid flowing from the pump shaft 100a into the second motor chamber 131 can fall onto the isolation plate 40 and the heat-conducting component 50, and exchange heat with the control board 20 through the heat-conducting component 50.

[0061] In some embodiments, the first end cap 11 further forms an outlet 112. The first motor chamber 121 includes a first sub-chamber 121a communicating with the inlet 111 and a second sub-chamber 121b communicating with the outlet 112. The first housing 12 includes a base plate 122 for isolating the first motor chamber 121 from the second motor chamber 131. The base plate 122 forms an opening 1221. The second motor chamber 131, the opening 1221, the first sub-chamber 121a, and the second sub-chamber 121b are sequentially connected. The first drive assembly 61 and the second drive assembly 62 are further configured to drive fluid from the second motor chamber 131 sequentially through the opening 1221, the first sub-chamber 121a, and the second sub-chamber 121b, and pump it out from the outlet 112.

[0062] Specifically, as the first rotor 611 and the second rotor 612 of the first drive assembly 61 rotate, the pressure in the hydraulic chamber 61a between the first rotor 611 and the second rotor 612 changes, causing a negative pressure to be formed in the first motor chamber 121. Under the action of the negative pressure, the fluid in the second motor chamber 131 can flow towards the opening 1221 and flow into the first sub-chamber 121a through the opening 1221 and be sucked into the hydraulic chamber 61a. As the first rotor 611 and the second rotor 612 continue to act, the volume of the originally fluid-filled hydraulic chamber 61a gradually decreases, the fluid is squeezed into the second sub-chamber 121b and pumped out from the outlet 112, thereby generating the power of flow.

[0063] In some embodiments, the first end cap 11 further includes a buffer cavity 113, a first inlet 114, and a second inlet 115. The buffer cavity 113 is connected to the inlet 111, the first inlet 114 is connected to the buffer cavity 113 and the first motor chamber 121, and the second inlet 115 is connected to the buffer cavity 113 and the pump shaft 100a.

[0064] The buffer chamber 113 serves to temporarily store fluid, which can reduce the impact force of fluid flowing into the first motor chamber 121 and pump shaft 100a, thereby protecting the first drive assembly 61 in the first motor chamber 121 and the second drive assembly 62 in the second motor chamber 131. Furthermore, the buffer chamber 113 helps to improve the fluid intake conditions, especially in the initial stage of fluid start-up or when the fluid viscosity is high, making it easier to establish the initial fluid flow and improve the working efficiency of the electric oil pump 100.

[0065] The first inlet 114 connects the buffer chamber 113 and the first sub-chamber 121a of the first motor chamber 121.

[0066] Driven by the first drive assembly 61 and the second drive assembly 62, fluid can flow into the buffer chamber 113 through the inlet 111. The fluid in the buffer chamber 113 has two flow paths. One flow path is as follows: under the drive of the first drive assembly 61, the fluid in the buffer chamber 113 flows into the first sub-chamber 121a through the first inlet 114. When the first rotor 611 and the second rotor 612 rotate to a certain angle, the volume of the hydraulic chamber 61a gradually increases, thereby forming a partial vacuum, so that the fluid can be drawn into the hydraulic chamber 61a. When the first rotor 611 and the second rotor 612 continue to rotate, the volume of the hydraulic chamber 61a, which was originally full of fluid, gradually decreases, and the fluid is squeezed into the second sub-chamber 121b and pumped out from the outlet 112. Another flow path is as follows: Under the drive of the second drive assembly 62, the fluid in the buffer chamber 113 flows into the pump shaft 100a through the second inlet 115, and flows into the second motor chamber 131 along the pump shaft 100a to cool the second drive assembly 62 and the electronic control board 20. Under the drive of the first drive assembly 61, the fluid flows into the first sub-chamber 121a through the opening 1221 on the bottom plate 122 of the first housing 12 and is sucked into the hydraulic chamber 61a. Under the drive of the first drive assembly 61, the fluid flows from the hydraulic chamber 61a into the second sub-chamber 121b and is pumped out from the outlet 112.

[0067] In some embodiments, the electric oil pump 100 further includes a filter element 30. The filter element 30 is disposed at the inlet 111 and is used to filter the fluid flowing into the buffer chamber 113 through the inlet 111. The filter element 30 can filter out impurities in the fluid, ensuring the purity and quality of the fluid. This not only improves the working efficiency of the electric oil pump 100, but also reduces the risk of damage to the first drive assembly 61 and the second drive assembly 62 in the electric oil pump 100 by impurities.

[0068] In some embodiments, the base plate 122 is provided with a guide post 1222 extending into the second motor chamber 131. The guide post 1222 connects the first motor chamber 121 and the second motor chamber 131. The pump shaft 100a passes through the guide post 1222 and is rotatably connected to the guide post 1222. The guide post 1222 can fix the pump shaft 100a and prevent the pump shaft 100a from falling off during the operation of the electric oil pump 100.

[0069] Since the end of the pump shaft 100a used to connect to the inlet 111 is rotatably disposed at the bottom of the first end cover 11, and the pump shaft 100a is rotatably connected to the guide post 1222 on the bottom plate 122 of the first housing 12, the first end cover 11 and the guide post 1222 form a double support structure to support the pump shaft 100a. This not only improves the structural strength of the pump shaft 100a and reduces the risk of the pump shaft 100a loosening or falling off during the operation of the electronic oil pump 100, but also improves the concentricity of the first drive assembly 61 and the second drive assembly 62, thereby improving the transmission efficiency and rotational stability of the first drive assembly 61 and the second drive assembly 62, and thus improving the stability and reliability of the electronic oil pump 100.

[0070] In another aspect of this application, a vehicle is provided, which includes the electronic oil pump 100 of any of the above embodiments.

[0071] In the technical solutions of this application embodiment, the specific structure of the electronic oil pump 100 refers to the above embodiments. Since the vehicle provided by this application adopts all the technical solutions of all the above embodiments of the electronic oil pump 100, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electronic oil pump, characterized in that, The electronic oil pump includes: The pump casing has an inlet, a first chamber, and a second chamber. The electronic control board is located inside the second cavity; An isolation plate is sealed to the inner wall of the pump casing to isolate the first cavity from the second cavity; A heat-conducting component is provided in part between the electronic control board and the isolation plate and is thermally connected to the electronic control board, and another part is embedded in the isolation plate, with the side away from the electronic control board exposed in the first cavity; A pump shaft is rotatably mounted on the pump housing and located within the first cavity. One end of the pump shaft is connected to the inlet, and the other end is connected to the first cavity. A drive assembly is sleeved outside the pump shaft and electrically connected to the electronic control board. The drive assembly is used to drive fluid from the inlet through the pump shaft into the first cavity, so that the fluid exchanges heat with at least a portion of the drive assembly and with the electronic control board through the heat-conducting assembly.

2. The electronic oil pump according to claim 1, characterized in that, The electronic oil pump also includes a temperature measuring component, which is electrically connected to the electronic control board. The temperature measuring component is used to detect the temperature of the electronic control board, and the electronic control board is used to control the rotation speed of the drive component in response to the detected temperature of the temperature measuring component, thereby controlling the flow rate of the fluid flowing into the first cavity via the pump shaft.

3. The electronic oil pump according to claim 1, characterized in that, The other end of the pump shaft is opposite to and spaced apart from the heat-conducting component.

4. The electronic oil pump according to claim 1, characterized in that, The thermally conductive component includes: A first heat-conducting element is embedded in the isolation plate. The side of the first heat-conducting element away from the electronic control board is exposed in the first cavity. The side of the first heat-conducting element close to the electronic control board is flush with the side of the isolation plate close to the electronic control board. The second heat-conducting element is disposed between the isolation plate and the electronic control board, and at least part of the second heat-conducting element is in contact with the first heat-conducting element. The fluid flowing into the first cavity exchanges heat with the electronic control board through the first heat-conducting element and the second heat-conducting element.

5. The electronic oil pump according to claim 4, characterized in that, The second thermal conductive component includes a thermal pad, thermally conductive silicone, or thermally conductive grease.

6. The electronic oil pump according to claim 1, characterized in that, The electronic oil pump also includes a first seal, which is disposed on the end face of the isolation plate facing the inner wall of the pump housing and is arranged circumferentially around the isolation plate.

7. The electronic oil pump according to claim 1, characterized in that, The drive assembly includes a first drive assembly and a second drive assembly; the first cavity includes a first motor chamber and a second motor chamber; the pump housing includes: The first end cap has the aforementioned inlet. A first housing is connected to the end of the first end cap away from the inlet, and the first housing forms the first motor chamber, which is in communication with the inlet. The second housing is connected to the end of the first housing away from the first end cap, and the second housing forms the second motor chamber; One end of the pump shaft is rotatably disposed at the bottom of the first end cover, and the other end extends through the first motor chamber into the second motor chamber. The first drive assembly is disposed in the first motor chamber and sleeved outside the pump shaft, and the second drive assembly is disposed in the second motor chamber and sleeved outside the pump shaft. The pump shaft is used to drive the first drive assembly to rotate under the drive of the second drive assembly, so that the fluid flows from the inlet through the pump shaft into the second motor chamber and exchanges heat with the second drive assembly and the electronic control board.

8. The electronic oil pump according to claim 7, characterized in that, The first end cap also forms an outlet. The first motor chamber includes a first sub-chamber communicating with the inlet and a second sub-chamber communicating with the outlet. The first housing includes a bottom plate for isolating the first motor chamber and the second motor chamber. The bottom plate forms an opening. The second motor chamber, the opening, the first sub-chamber and the second sub-chamber are sequentially connected. The first driving component and the second driving component are further configured to drive the fluid from the second motor chamber through the opening, the first sub-chamber and the second sub-chamber in sequence, and pump it out from the outlet.

9. The electronic oil pump according to claim 8, characterized in that, The base plate is provided with a guide post extending into the second motor chamber. The guide post connects the first motor chamber and the second motor chamber. The pump shaft passes through the guide post and is rotatably connected to the guide post.

10. A vehicle, characterized in that, The vehicle includes an electronic oil pump as described in any one of claims 1 to 9.

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