Electronic oil pump and vehicle

Abstract

The utility model provides an electronic oil pump and a vehicle, the electronic oil pump comprises a first driving assembly, a second driving assembly, a first shell and a second shell, a first cavity and a second cavity are formed in the first shell, the first cavity communicates with a flow inlet and a flow outlet, and the first driving assembly is arranged in the first cavity; the second shell is connected to the end, away from the flow inlet, of the first shell, a third cavity communicating with the second cavity is formed in the second shell, the second driving assembly is arranged in the second cavity and / or the third cavity, and the second driving assembly is used for driving the first driving assembly to rotate, so that fluid flows into the first cavity through the flow inlet and is pumped out through the flow outlet; wherein the first shell comprises a plastic shell, and the second shell comprises a metal shell. According to the electronic oil pump, the plastic shell serves as the first shell of the electronic oil pump, the metal shell serves as the second shell of the electronic oil pump, the overall weight of the electronic oil pump can be reduced, and then the overall weight of a vehicle is reduced.

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 the existing technology, the design of electronic fuel pumps usually focuses more on how to improve the stability of the electronic fuel pump operation. For example, the stability of the overall frame of the electronic fuel pump is usually improved by strengthening the structural strength of the electronic fuel pump housing, thereby improving the stability of the electronic fuel pump operation. Under this design concept, the electronic fuel pump housing is usually heavy, which leads to an increase in the overall weight of the vehicle, and consequently an increase in fuel consumption. Therefore, how to reduce the weight of electronic fuel pumps 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 reduce the weight 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 first drive assembly; a second drive assembly; a first housing having a first cavity and a second cavity, the first cavity communicating with an inlet and an outlet, the first drive assembly being disposed within the first cavity; a second housing connected to the end of the first housing away from the inlet, the second housing having a third cavity communicating with the second cavity, the second drive assembly being disposed within the second cavity and / or the third cavity, the second drive assembly being used to drive the first drive assembly to rotate, so that fluid flows into the first cavity through the inlet and is pumped out through the outlet; wherein, the first housing comprises a plastic housing and the second housing comprises a metal housing.

[0006] In some embodiments, the electronic oil pump further includes: an isolation plate disposed on the side of the second drive assembly away from the first drive assembly and sealed to the inner wall of the second cavity to seal the space on the side of the isolation plate facing the second drive assembly; an electronic control board disposed on the side of the isolation plate away from the second drive assembly; and a connecting terminal passing through the isolation plate, with one end of the connecting terminal electrically connected to the electronic control board and the other end electrically connected to the second drive assembly, the second drive assembly being electrically connected to the second housing, and the second housing being grounded.

[0007] In some embodiments, the electronic oil pump further includes: a first end cap, which is disposed on the end of the second housing away from the first housing, the first end cap forming a fourth cavity, an electronic control board disposed in the fourth cavity, and an isolation plate for isolating the third cavity and the fourth cavity; a second end cap, which is disposed on the end of the first housing away from the second housing, and the second end cap having an inlet and an outlet; wherein both the first end cap and the second end cap include plastic end caps.

[0008] In some embodiments, the first housing has a first flange portion at the end closest to the inlet and the second housing has a second flange portion at the end closest to the inlet; wherein the first flange portion has a first mounting hole and the second flange portion has a second mounting hole adapted to the first mounting hole, the first mounting hole and the second mounting hole are used to cooperate with a fixing component to fix the first housing and the second housing; or, one of the first flange portion and the second flange portion has a slot and the other of the first flange portion and the second flange portion has a locking block adapted to the slot, the locking block being embedded in the slot to fix the first housing and the second housing.

[0009] In some embodiments, the second drive assembly is disposed in the third cavity, and the second drive assembly extends at least partially into the second cavity; wherein the portion of the second drive assembly located in the second cavity is spaced apart from the first housing, and the portion of the second drive assembly located in the third cavity is interference-fitted with the second housing.

[0010] In some embodiments, the electronic oil pump further includes a pump shaft, one end of which is rotatably disposed at the bottom of the second end cover and communicates with the inlet, and the other end of which passes through the first cavity, the second cavity and the third cavity in sequence, extends toward the isolation plate and communicates with the third cavity, and the first drive assembly and the second drive assembly are sleeved on the pump shaft; wherein, the pump shaft is 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 third cavity and the second cavity, and exchanges heat with the second drive assembly.

[0011] In some embodiments, the isolation plate includes an isolation plate body and a first heat-conducting element. The first heat-conducting element is embedded in the isolation plate body, and the side of the first heat-conducting element away from the electronic control board is exposed in the third cavity. The side of the first heat-conducting element near the electronic control board is flush with the side of the isolation plate body near the electronic control board. The electronic oil pump also includes a second heat-conducting element, which is disposed between the first heat-conducting element and the electronic control board and is thermally connected to the first heat-conducting element and the electronic control board. The fluid flowing into the third cavity exchanges heat with the electronic control board through the first heat-conducting element and the second heat-conducting element.

[0012] In some embodiments, the first cavity includes a first sub-cavity communicating with an inlet and a second sub-cavity communicating with an outlet. The first housing includes a bottom plate for isolating the first cavity and the second cavity. The bottom plate has an opening. The second cavity, the opening, the first sub-cavity, and the second sub-cavity are sequentially connected. The first driving assembly and the second driving assembly are further used to drive fluid from the second cavity 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 cavity, the guide post connecting the first cavity and the second cavity, 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 first drive assembly, a second drive assembly, a first housing, and a second housing. The first housing forms a first cavity and a second cavity. The first cavity is connected to an inlet and an outlet. The first drive assembly is disposed in the first cavity. The second housing is connected to the end of the first housing away from the inlet. The second housing forms a third cavity that is connected to the second cavity. The second drive assembly is disposed in the second cavity and / or the third cavity. The second drive assembly is used to drive the first drive assembly to rotate so that fluid flows into the first cavity through the inlet and is pumped out through the outlet. The first housing includes a plastic housing, and the second housing includes a metal housing. By using a plastic housing as the first housing of the electronic fuel pump and a metal housing as the second housing, the advantages of both can be combined. Firstly, the metal housing has high strength and rigidity, which can enhance the overall structural strength of the electronic fuel pump housing, thereby improving the stability of the electronic fuel pump operation. Secondly, the plastic housing is lightweight and has relatively low processing costs, which can not only reduce the overall production cost of the electronic fuel pump, but also reduce the overall weight of the electronic fuel pump, thereby reducing the overall weight of the vehicle and thus reducing vehicle energy consumption and emissions. Thirdly, the plastic housing can absorb vibration and noise, reducing the noise and vibration generated when the first and second drive components rotate and transmitted to the vehicle, thereby effectively improving the NVH performance of the electronic fuel pump. 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 the structure 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 cross-sectional view of another embodiment of the electronic oil pump provided in this application;

[0020] Figure 4 This is a cross-sectional view of the third embodiment of the electronic oil pump provided in this application.

[0021] The reference numerals in the detailed embodiments are as follows:

[0022] Electronic oil pump 100, pump shaft 100a, first drive assembly 10, first rotor 11, second rotor 12, hydraulic chamber 13, second drive assembly 20, third rotor 21, stator 22, iron core 221, coil 222, first housing 30, first cavity 31, first sub-cavity 311, second sub-cavity 312, second cavity 32, first flange 33, first mounting hole 331, slot 332, base plate 34, guide post 341, opening 342, second housing 40, third... Cavity 41, second flange 42, clamping block 421, third flange 43, isolation plate 51, isolation plate body 511, first heat-conducting component 512, sealing component 52, second heat-conducting component 53, electrical control board 60, components 61, connecting terminal 70, main body 71, first connecting part 72, second connecting part 73, first end cover 80, fourth cavity 81, second end cover 90, inlet 91, outlet 92, buffer cavity 93, first inlet 94, second inlet 95, filter element 96. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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).

[0027] 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.

[0028] 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.

[0029] 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.

[0030] See also Figures 1 to 2 , Figure 1 This is a schematic diagram of the structure 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 transmissions such as an internal combustion engine, a fuel vehicle, or a hybrid vehicle, but is not limited thereto. The electronic fuel pump 100 includes a first drive assembly 10, a second drive assembly 20, a first housing 30, and a second housing 40. The first housing 30 has a first cavity 31 and a second cavity 32. The first cavity 31 connects to an inlet 91 and an outlet 92, and the first drive assembly 10 is disposed within the first cavity 31. The second housing 40 is connected to the end of the first housing 30 away from the inlet 91. The second housing 40 forms a third cavity 41 that communicates with the second cavity 32. The second drive assembly 20 is disposed in the second cavity 32 and / or the third cavity 41. The second drive assembly 20 is used to drive the first drive assembly 10 to rotate so that fluid flows into the first cavity 31 through the inlet 91 and is pumped out through the outlet 92.

[0031] 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.

[0032] In some embodiments, the electronic oil pump 100 further includes a pump shaft 100a, which sequentially passes through the first cavity 31, the second cavity 32, and the third cavity 41, and is rotatably connected to the first housing 30. A first drive assembly 10 and a second drive assembly 20 are sleeved outside the pump shaft 100a, and the second drive assembly 20 is driveably connected to the first drive assembly 10 via the pump shaft 100a. The first drive assembly 10 includes a first rotor 11 and a second rotor 12. The first rotor 11 is sleeved outside the pump shaft 100a for drive connection. The second rotor 12 is sleeved outside the first rotor 11. The first rotor 11 includes multiple external teeth, and the second rotor 12 includes multiple internal teeth adapted to the external teeth of the first rotor 11. The multiple external teeth and the multiple internal teeth mesh with a certain clearance, and there is a certain eccentricity between the first rotor 11 and the second rotor 12 to form a hydraulic chamber 13 between the first rotor 11 and the second rotor 12.

[0033] The first rotor 11 and the second rotor 12 can be plastic rotors. The first rotor 11 and the second rotor 12 can be integrally formed by injection molding, extrusion molding, milling, turning, or other methods. The material of the first rotor 11 and the second rotor 12 can be selected from thermosetting materials, polyetheretherketone (PEEK), polycarbonate (PC), or polyetherimide (PEI), but is not limited to these. Using plastic rotors for the first rotor 11 and the second rotor 12 not only reduces the overall weight of the electronic oil pump 100 but also improves the rotational efficiency of the first rotor 11 and the second rotor 12. Furthermore, plastic rotors have good wear resistance, which can extend the service life of the electronic oil pump 100 to a certain extent.

[0034] The second drive assembly 20 includes a third rotor 21 and a stator 22. The third rotor 21 is sleeved outside the pump shaft 100a for transmission connection with the pump shaft 100a. The stator 22 is sleeved outside the third rotor 21. The stator 22 includes an iron core 221 and a coil 222.

[0035] In some embodiments, the electronic oil pump 100 further includes an electronic control board 60. When the electronic oil pump 100 is working, the electronic control board 60 controls the current in the coil 222 of the stator 22 to change according to a predetermined pattern, thereby controlling the stator 22 to generate a changing excitation magnetic field. The third rotor 21 rotates under the action of the excitation magnetic field. When the third rotor 21 rotates, it can drive the pump shaft 100a to rotate, and through the pump shaft 100a, it drives the first rotor 11 to rotate. Since there is a certain eccentricity between the first rotor 11 and the second rotor 12, when the first rotor 11 rotates, some of the external teeth of the first rotor 11 mesh with some of the internal teeth of the second rotor 12, thereby driving the second rotor 12 to rotate. During the rotation of the first rotor 11 and the second rotor 12, the pressure in the hydraulic chamber 13 between the first rotor 11 and the second rotor 12 changes, so that fluid can flow into the first chamber 31 through the inlet 91 and be sucked into the hydraulic chamber 13, and pumped out through the outlet 92. Specifically, when the first rotor 11 and the second rotor 12 rotate to a certain angle, the volume of the hydraulic chamber 13 gradually increases, creating a partial vacuum. This allows fluid to flow into the first chamber 31 through the inlet 91 and be drawn into the hydraulic chamber 13. As the first rotor 11 and the second rotor 12 continue to rotate, the volume of the hydraulic chamber 13, which was originally filled with fluid, gradually decreases. The fluid is compressed, causing the fluid flowing into the hydraulic chamber 13 to be forced out to the outlet 92, thus generating flow power. The fluid pumped out from the outlet 92 can flow into the vehicle's fuel supply line to provide necessary fuel support for the vehicle's engine.

[0036] The first housing 30 includes a plastic housing, and the second housing 40 includes a metal housing. The plastic housing and the metal housing are fixedly connected to form a first cavity 31, a second cavity 32, and a third cavity 41 arranged sequentially along the axes of the first housing 30 and the second housing 40.

[0037] The first housing 30 can be integrally formed by injection molding, compression molding, or pressure injection molding, but is not limited to these methods. The material of the first housing 30 can be thermosetting material, polyetheretherketone material, polycarbonate material, or polyetherimide material, but is not limited to these methods.

[0038] The second housing 40 can be integrally formed by stamping, injection molding, or casting, but is not limited to these methods. The material of the second housing 40 can be aluminum alloy, sheet metal, stainless steel, steel, or cast iron, but is not limited to these methods.

[0039] By using a plastic housing as the first housing 30 of the electronic oil pump 100 and a metal housing as the second housing 40, the advantages of both can be combined. On the one hand, the metal housing has high strength and rigidity, which can enhance the overall structural strength of the electronic oil pump 100 housing, thereby improving the operational stability of the electronic oil pump 100. On the other hand, the plastic housing is lightweight and has relatively low processing costs, which can not only reduce the overall production cost of the electronic oil pump 100, but also reduce the overall weight of the electronic oil pump 100, thereby reducing the overall weight of the vehicle and thus reducing the vehicle's energy consumption and emissions. Thirdly, the plastic housing can absorb vibration and noise, reducing the noise and vibration generated when the first drive assembly 10 and the second drive assembly 20 rotate and transmitted to the vehicle, thereby effectively improving the NVH performance of the electronic oil pump 100.

[0040] NVH performance refers to noise, vibration, and acoustic roughness, and is an important indicator for measuring the comfort of vehicles and other means of transportation.

[0041] Please refer to the following: Figure 3 , Figure 3 This is a cross-sectional view of another embodiment of the electronic oil pump provided in this application. The electronic oil pump 100 also includes an isolation plate 51, an electronic control board 60, and connecting terminals 70. The isolation plate 51 is disposed on the side of the second drive assembly 20 away from the first drive assembly 10, and is sealed to the inner wall of the second cavity 32 to seal the space on the side of the isolation plate 51 facing the second drive assembly 20. The electronic control board 60 is disposed on the side of the isolation plate 51 opposite to the second drive assembly 20.

[0042] The isolation plate 51 is spaced apart from the second drive assembly 20, which can prevent the isolation plate 51 and the third rotor 21 of the second drive assembly 20 from being damaged due to interference when the electronic oil pump 100 is working, so that the third rotor 21 can rotate stably.

[0043] In some embodiments, the electronic oil pump 100 further includes a seal 52 disposed on the end face of the partition plate 51 facing the inner wall of the second housing 40 and arranged circumferentially around the partition plate 51. The seal 52 is used to abut against the inner wall of the second housing 40 to achieve a sealed connection between the partition plate 51 and the inner wall of the second cavity 32, thereby sealing the space of the partition plate 51 facing the second drive assembly 20.

[0044] The seal 52 can be an annular elastic seal 52. The seal 52 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 seal 52 is elastic, which on the one hand, acts as a buffer for the second housing 40, avoiding the risk of damage or cracking of the second housing 40 due to friction between the isolation plate 51 and the second housing 40; on the other hand, the seal 52 enhances the sealing effect between the isolation plate 51 and the inner wall of the second housing 40, preventing fluid flowing into the space of the isolation plate 51 facing the second drive assembly 20 from flowing into the side of the isolation plate 51 away from the second drive assembly 20 and corroding the electronic control board 60.

[0045] A connecting terminal 70 passes through the isolation plate 51, with one end of the connecting terminal 70 electrically connected to the electrical control board 60 and the other end electrically connected to the second drive assembly 20. The second drive assembly 20 is electrically connected to the second housing 40. The second housing 40 is grounded.

[0046] The connecting terminal 70 includes a main body 71, a first connecting part 72, and a second connecting part 73. The main body 71 is connected between the first connecting part 72 and the second connecting part 73. The main body 71 extends through both sides of the isolation plate 51 along the axial direction of the pump shaft 100a. The first connecting part 72 is connected to the end of the main body 71 near the control board 60 and is electrically connected to the control board 60. The second connecting part 73 is connected to the end of the main body 71 near the second drive assembly 20 and is electrically connected to the stator 22 of the second drive assembly 20. Specifically, the second connecting part 73 is inserted into the core slot 221a of the iron core 221 of the stator 22 to be electrically connected to the iron core 221. The stator 22 of the second drive assembly 20 is interference-fitted with the second housing 40 so that the iron core 221 of the stator 22 is interference-fitted with the second housing 40 for conduction, and the second housing 40 is grounded. During the operation of the electronic oil pump 100, the control board 60, connecting terminal 70, second drive assembly 20, and second housing 40 form a current path. The control board 60 supplies three-phase AC power to the stator 22 of the second drive assembly 20 through the connecting terminal 70 to control the rotation of the third rotor 21, thereby controlling the operation of the entire electronic oil pump 100. By making the iron core 221 of the second drive assembly 20 interference-fitted with the second housing 40, and grounding the second housing 40, the control board 60 and the second drive assembly 20 are grounded and connected. This method is faster and more efficient than wire-connected signal transmission, and has better electromagnetic compatibility.

[0047] In some embodiments, the electronic oil pump 100 further includes a first end cap 80 and a second end cap 90. The first end cap 80 is disposed on the end of the second housing 40 away from the first housing 30, and the first end cap 80 forms a fourth cavity 81. An electronic control board 60 is disposed in the fourth cavity 81, and an isolation plate 51 is used to isolate the third cavity 41 and the fourth cavity 81. The second end cap 90 is disposed on the end of the first housing 30 away from the second housing 40, and the second end cap 90 has an inlet 91 and an outlet 92.

[0048] The first end cap 80, the first housing 30, the second housing 40, and the second end cap 90 are connected in sequence to form the housing of the electronic oil pump 100. The isolation plate 51 is provided at the end of the second housing 40 away from the first housing 30 to isolate the third cavity 41 and the fourth cavity 81.

[0049] Both the first end cap 80 and the second end cap 90 are plastic end caps. Both the first end cap 80 and the second end cap 90 can be integrally formed by injection molding, compression molding, or pressure injection molding, but are not limited to these methods. The materials of both the first end cap 80 and the second end cap 90 can be thermosetting materials, polyetheretherketone materials, polycarbonate materials, or polyetherimide materials, but are not limited to these.

[0050] By using plastic end caps as the first end cap 80 and the second end cap 90, the overall production cost of the electronic oil pump 100 can be further reduced and the overall weight of the electronic oil pump 100 can be reduced. At the same time, the NVH performance of the electronic oil pump 100 can also be further improved.

[0051] The first housing 30 has a first flange 33 at the end near the inlet 91, and the second housing 40 has a second flange 42 at the end near the inlet 91.

[0052] In some embodiments, please continue reading Figure 1 The first flange portion 33 is provided with a first mounting hole 331, and the second flange portion 42 is provided with a second mounting hole (not shown) that matches the first mounting hole 331. The first mounting hole 331 and the second mounting hole are used to mate with a fixing component to fix the first housing 30 and the second housing 40 together. The fixing component can be sequentially inserted into the first mounting hole 331 and the second mounting hole and threadedly connected to the first mounting hole 331 and the second mounting hole to unite the first housing 30 and the second housing 40 into one piece. The fixing component can be a screw, bolt, stud, etc., but is not limited to these.

[0053] Please refer to the following: Figure 4 , Figure 4 This is a cross-sectional view of the third embodiment of the electronic oil pump provided in this application. In some embodiments, one of the first flange portion 33 and the second flange portion 42 is provided with a groove 332, and the other of the first flange portion 33 and the second flange portion 42 is provided with a locking block 421 adapted to the groove 332. The locking block 421 is embedded in the groove 332 to fix the first housing 30 and the second housing 40 together. The groove 332 may be provided on the end face of one of the first flange portion 33 and the second flange portion 42 facing the other of the first flange portion 33 and the second flange portion 42, and the groove 332 is circumferentially arranged around one of the first flange portion 33 and the second flange portion 42. The locking block 421 can be provided on the end face of the other of the first flange 33 and the second flange 42 facing the other of the first flange 33 and the second flange 42, and the locking block 421 is arranged circumferentially around the other of the first flange 33 and the second flange 42, so that after the first housing 30 and the second housing 40 are fixedly connected, their connection surfaces can fit tightly together, thereby improving the sealing performance of the electronic oil pump 100.

[0054] The slot 332 can have a rectangular cross-section along the axial direction of the pump shaft 100a, and the block 421 can have a rectangular cross-section along the axial direction of the pump shaft 100a; alternatively, the slot 332 can have a T-shaped slot, and the block 421 can have a T-shaped block; or the slot 332 can have a dovetail slot, and the block 421 can have a dovetail block, but these are not limited to these. The structure of the slot 332 and the block 421 can be selected according to the actual situation.

[0055] In some embodiments, the second housing 40 has a third flange 43 at the end away from the inlet 91. The second flange 42 and / or the third flange 43 can be grounded so that during the operation of the electronic oil pump 100, the control board 60, the connection terminal 70, the stator 22 of the second drive assembly 20, and the second housing 40 form a current path. Since both the second flange 42 and the third flange 43 extend in a direction away from the third cavity 41, grounding the second flange 42 and / or the third flange 43 can improve the connection efficiency of the second housing 40 to the ground wire, thereby improving the overall assembly efficiency of the electronic oil pump 100.

[0056] In some embodiments, the second housing 40 and the first end cap 80 can be fixedly combined into one unit by means of a fixing component; or, the second housing 40 and the first end cap 80 can also be combined into one unit by means of a locking block and a locking slot.

[0057] In some embodiments, the second end cap 90 and the first housing 30 can be fixedly combined into one body by means of a fixing component; or, the second end cap 90 and the first housing 30 can also be combined into one body by means of a locking block and a locking slot.

[0058] In some embodiments, please continue reading Figure 2 and Figure 4 The second drive assembly 20 is disposed within the third cavity 41, and the second drive assembly 20 extends at least partially into the second cavity 32. The portion of the second drive assembly 20 located within the second cavity 32 is spaced apart from the first housing 30, and the portion of the second drive assembly 20 located within the third cavity 41 is interference-fitted with the second housing 40.

[0059] During the manufacturing process of the electronic oil pump 100, the second drive assembly 20 can be fixed inside the second housing 40 by heat fitting. That is, the second housing 40 is heated to expand, and then a part of the second drive assembly 20 is pressed into the third cavity 41 of the second housing 40. After the second housing 40 cools and shrinks, the second drive assembly 20 and the second housing 40 can fit tightly together, thereby completing the assembly of the second drive assembly 20. The second drive assembly 20 is fixed inside the second housing 40 by a heat-shrink fitting. On the one hand, this significantly improves the assembly efficiency of the second drive assembly 20 and effectively positions it, ensuring the coaxiality between the second drive assembly 20 and the second housing 40 and preventing the second drive assembly 20 from tilting relative to the axis of the second housing 40, thereby improving the coaxiality between the second drive assembly 20 and the first drive assembly 10. On the other hand, the second housing 40 exerts a certain clamping force on the second drive assembly 20, which ensures that the second drive assembly 20 is fixed in position inside the second housing 40, preventing displacement of the second drive assembly 20 during transportation or operation of the electronic oil pump 100, thus ensuring the normal operation of the electronic oil pump 100.

[0060] By positioning the portion of the second drive assembly 20 located within the second cavity 32 at a distance from the first housing 30, damage to the first housing 30 caused by interference between the second drive assembly 20 and the first housing 30 can be avoided, thereby protecting the first housing 30.

[0061] In some embodiments, please continue reading Figure 2 and Figure 4 The first housing 30 includes a base plate 34 for isolating the first cavity 31 and the second cavity 32. The base plate 34 is provided with a guide post 341 extending into the second cavity 32, and the guide post 341 connects the first cavity 31 and the second cavity 32. One end of the pump shaft 100a is rotatably disposed at the bottom of the second end cover 90, and the other end of the pump shaft 100a passes through the guide post 341, so as to extend towards the isolation plate 51 by sequentially passing through the first cavity 31, the second cavity 32 and the third cavity 41. The pump shaft 100a is rotatably connected to the guide post 341.

[0062] By rotatably mounting the pump shaft 100a at the bottom of the second end cover 90 and passing through and rotatably connecting it to the guide post 341, the second end cover 90 and the guide post 341 form a double support structure for supporting the pump shaft 100a. This not only improves the structural strength of the pump shaft 100a and reduces the risk of loosening or falling off during the operation of the electronic oil pump 100, but also improves the concentricity of the first drive assembly 10 and the second drive assembly 20, thereby improving the transmission efficiency and rotational stability of the first drive assembly 10 and the second drive assembly 20, and ultimately improving the stability and reliability of the electronic oil pump 100.

[0063] One end of the pump shaft 100a is connected to the inlet 91, and the other end is spaced apart from the isolation plate 51 and connected to the third cavity 41. Since the first drive assembly 10 and the second drive assembly 20 are sleeved outside the pump shaft 100a, the pump shaft 100a is used to drive the first drive assembly 10 to rotate under the drive of the second drive assembly 20, so that the fluid flows from the inlet 91 through the pump shaft 100a into the third cavity 41 and the second cavity 32, and exchanges heat with the second drive assembly 20.

[0064] By allowing the fluid to flow directly from the inlet 91 into the third chamber 41 and the second chamber 32 via the pump shaft 100a and exchange heat with the second drive assembly 20, on the one hand, the fluid flows directly into the third chamber 41 and the second chamber 32 through the inlet 91 and the pump shaft 100a without passing through the first drive assembly 10, which can reduce the influence of the first drive assembly 10 on the fluid temperature and improve the heat exchange effect of the fluid on the second drive assembly 20, thereby improving the heat dissipation efficiency of the second drive assembly 20. This can prevent the material deformation or damage of the second drive assembly 20 due to high temperature, thus effectively improving the service life of the second drive assembly 20. On the other hand, the fluid can wet the second drive assembly 20, thereby improving the lubrication between the third rotor 21 of the second drive assembly 20 and the pump shaft 100a, reducing friction and wear, and thus further extending the service life of the second drive assembly 20.

[0065] In some embodiments, please continue reading Figure 2 The isolation plate 51 includes an isolation plate body 511 and a first heat-conducting element 512. The isolation plate body 511 is sealed to the inner wall of the second cavity 32. The first heat-conducting element 512 is embedded in the isolation plate body 511, and the side of the first heat-conducting element 512 away from the electronic control board 60 is exposed in the third cavity 41. The side of the first heat-conducting element 512 near the electronic control board 60 is flush with the side of the isolation plate body 511 near the electronic control board 60. The electronic oil pump 100 also includes a second heat-conducting element 53, which is disposed between the first heat-conducting element 512 and the electronic control board 60, and is thermally connected to both the first heat-conducting element 512 and the electronic control board 60. The fluid flowing into the third cavity 41 exchanges heat with the electronic control board 60 through the first heat-conducting element 512 and the second heat-conducting element 53.

[0066] The first heat-conducting component 512 can be a metal heat-conducting component. For example, the first heat-conducting component 512 can be a silver heat-conducting component, a copper heat-conducting component, an aluminum heat-conducting component, a brass heat-conducting component, etc., but is not limited to these. The second heat-conducting component 53 can be a thermal pad, thermal silicone, or thermal grease, etc., but is not limited to these. Among them, the thermal pad can be a soft silicone thermal pad, a rubber thermal pad, an asbestos thermal pad, or a polytetrafluoroethylene (PTFE) thermal pad, etc., but is not limited to these.

[0067] Thermal pads, thermally conductive silicone, and thermally conductive grease all possess high thermal conductivity, enabling the second thermally conductive element 53 to increase the coupling between the first thermally conductive element 512 and the electronic control board 60. This allows for more effective transfer of the fluid's cooling capacity to the electronic control board 60, thereby improving its heat dissipation. Furthermore, the second thermally conductive element 53 is made of insulating material, preventing short circuits between the first thermally conductive element 512 and the electronic control board 60, thus enhancing the reliability of the electronic oil pump 100.

[0068] The first heat-conducting element 512 can be arranged opposite to the pump shaft 100a, so that the fluid flowing out from the other end of the pump shaft 100a can directly fall onto the first heat-conducting element 512 and exchange heat with the electronic control board 60 through the first heat-conducting element 512 and the second heat-conducting element 53. This not only shortens the flow path of the fluid from the pump shaft 100a to the first heat-conducting element 512, thereby improving the heat dissipation efficiency of the electronic control board 60, but also reduces the influence of the temperature of the second drive component 20 and the ambient temperature in the third cavity 41 on the temperature of the fluid, thereby improving the heat exchange effect of the fluid on the electronic control board 60, and thus improving the heat dissipation effect of the electronic control board 60.

[0069] By using fluid to dissipate heat from the control board 60, on the one hand, the damage to the components 61 on the control board 60 caused by high temperatures can be reduced, the aging rate of the components 61 on the control board 60 can be slowed down, thereby extending the service life of the components 61 and reducing the maintenance cost of the electronic oil pump 100. On the other hand, in the selection of components 61, lower-cost components such as high-resistance and low-temperature-resistance components 61 can be selected. For example, lower-cost components such as high-resistance and low-temperature-resistance MOSFETs, main control chips, electrolytic capacitors and inductors can be selected, but not limited to these, thereby further reducing the overall cost of the electronic oil pump 100.

[0070] In some embodiments, the electronic oil pump 100 further includes a temperature sensing component (not shown) for detecting the temperature of the electronic control board 60, and the electronic control board 60 for controlling the rotational speed of the second drive component 20 in response to the temperature detected by the temperature sensing component, thereby controlling the flow rate of the fluid flowing into the third cavity 41.

[0071] When the temperature sensing component detects that the temperature of the control board 60 is high, the control board 60 controls the rotation speed of the second drive component 20 to increase the flow rate of the fluid flowing into the third chamber 41 via the pump shaft 100a; when the temperature sensing component detects that the temperature of the control board 60 is low, the control board 60 controls the rotation speed of the second drive component 20 to decrease the flow rate of the fluid flowing into the third chamber 41 via the pump shaft 100a. This achieves precise temperature control of the control board 60 by controlling the flow rate of the fluid flowing into the third chamber 41 according to the temperature of the control board 60, enabling the control board 60 to operate within the optimal temperature range. This not only avoids performance degradation or damage to the components 61 on the control board 60 due to excessive temperature, but also provides just the right fluid supply, saving energy.

[0072] In some embodiments, please continue reading Figure 2 and Figure 4 The first cavity 31 includes a first sub-cavity 311 connected to the inlet 91 and a second sub-cavity 312 connected to the outlet 92. The bottom plate 34 of the first housing 30 has an opening 342. The second cavity 32, the opening 342, the first sub-cavity 311, and the second sub-cavity 312 are sequentially connected. The first drive assembly 10 and the second drive assembly 20 are also used to drive fluid from the second cavity 32 through the opening 342, the first sub-cavity 311, and the second sub-cavity 312 in sequence, and pump it out from the outlet 92.

[0073] In some embodiments, the second end cap 90 further includes a buffer cavity 93, a first inlet 94, and a second inlet 95. The buffer cavity 93 is connected to the inlet 91, the first inlet 94 is connected to the buffer cavity 93 and the first cavity 31, and the second inlet 95 is connected to the buffer cavity 93 and the pump shaft 100a.

[0074] The buffer chamber 93 serves to temporarily store fluid, which can reduce the impact force of fluid flowing into the first chamber 31 and pump shaft 100a, thereby protecting the first drive assembly 10 in the first chamber 31 and the second drive assembly 20 in the third chamber 41. Furthermore, the buffer chamber 93 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 electronic oil pump 100.

[0075] Please continue reading. Figure 4The fluid in the buffer chamber 93 has two flow paths. One flow path is as follows: under the drive of the first drive assembly 10, the fluid in the buffer chamber 93 flows into the first sub-chamber 311 of the first chamber 31 through the first inlet 94 and is sucked into the hydraulic chamber 13. Under the drive of the first drive assembly 10, the fluid flows from the hydraulic chamber 13 into the second sub-chamber 312 and is pumped out from the outlet 92. The other flow path is as follows: under the drive of the second drive assembly 20, the fluid flows into the pump shaft 100a from the second inlet 95 and flows along the pump shaft 100a into the third chamber 41 and the second chamber 32 to cool the second drive assembly 20 and the electronic control board 60. Under the drive of the first drive assembly 10, the fluid flows into the first sub-chamber 311 from the opening 342 on the bottom plate 34 of the first housing 30 and is sucked into the hydraulic chamber 13. Under the drive of the first drive assembly 10, the fluid flows from the hydraulic chamber 13 into the second sub-chamber 312 and is pumped out from the outlet 92.

[0076] In some embodiments, the electric oil pump 100 further includes a filter element 96. The filter element 96 is disposed at the inlet 91 and is used to filter the fluid flowing into the buffer chamber 93 through the inlet 91. The filter element 96 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 10 and the second drive assembly 20 in the electric oil pump 100 by impurities.

[0077] In another aspect of this application, a vehicle is provided. The vehicle includes the electronic oil pump 100 of any of the above embodiments.

[0078] 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.

[0079] 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: First driving component; Second drive component; The first housing has a first cavity and a second cavity, the first cavity being connected to an inlet and an outlet, and the first drive assembly being disposed within the first cavity; A second housing is connected to the end of the first housing away from the inlet. The second housing forms a third cavity that communicates with the second cavity. The second drive assembly is disposed in the second cavity and / or the third cavity. The second drive assembly is used to drive the first drive assembly to rotate so that fluid flows into the first cavity through the inlet and is pumped out through the outlet. The first housing includes a plastic housing, and the second housing includes a metal housing.

2. The electronic oil pump according to claim 1, characterized in that, The electronic oil pump also includes: An isolation plate is disposed on the side of the second drive assembly away from the first drive assembly and is sealed to the inner wall of the second cavity to seal the space on the side of the isolation plate facing the second drive assembly. An electronic control board is located on the side of the isolation plate facing away from the second drive assembly; A connection terminal is provided through the isolation plate, and one end of the connection terminal is electrically connected to the electronic control board, and the other end is electrically connected to the second drive component. The second drive component is electrically connected to the second housing, and the second housing is grounded.

3. The electronic oil pump according to claim 2, characterized in that, The electronic oil pump also includes: A first end cap is disposed on the end of the second housing away from the first housing. The first end cap forms a fourth cavity. The electronic control board is disposed in the fourth cavity. The isolation plate is used to isolate the third cavity and the fourth cavity. A second end cap is provided on the end of the first housing away from the second housing, and the second end cap is provided with the inlet and the outlet. Both the first end cap and the second end cap include plastic end caps.

4. The electronic oil pump according to claim 1, characterized in that, The first housing has a first flange at the end closest to the inlet, and the second housing has a second flange at the end closest to the inlet; The first flange portion is provided with a first mounting hole, and the second flange portion is provided with a second mounting hole adapted to the first mounting hole. The first mounting hole and the second mounting hole are used to cooperate with a fixing component so that the first housing and the second housing are fixedly connected. Alternatively, one of the first flange portion and the second flange portion may be provided with a slot, and the other of the first flange portion and the second flange portion may be provided with a locking block adapted to the slot. The locking block is embedded in the slot to fix the first housing and the second housing in a fixed connection.

5. The electronic oil pump according to claim 1, characterized in that, The second drive assembly is disposed within the third cavity, and the second drive assembly extends at least partially into the second cavity; The portion of the second drive assembly located within the second cavity is spaced apart from the first housing, and the portion of the second drive assembly located within the third cavity is interference-fitted with the second housing.

6. The electronic oil pump according to claim 3, characterized in that, The electronic oil pump also includes a pump shaft. One end of the pump shaft is rotatably disposed at the bottom of the second end cover and communicates with the inlet. The other end of the pump shaft passes through the first cavity, the second cavity and the third cavity in sequence, extends toward the isolation plate and communicates with the third cavity. The first drive assembly and the second drive assembly are sleeved on the outside of 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 into the third cavity and the second cavity through the pump shaft, and exchanges heat with the second drive assembly.

7. The electronic oil pump according to claim 6, characterized in that, The isolation plate includes an isolation plate body and a first heat-conducting component. The first heat-conducting component is embedded in the isolation plate body, and the side of the first heat-conducting component away from the electronic control board is exposed in the third cavity. The side of the first heat-conducting component close to the electronic control board is flush with the side of the isolation plate body close to the electronic control board. The electronic oil pump also includes a second heat-conducting component, which is disposed between the first heat-conducting component and the electronic control board, and is thermally connected to the first heat-conducting component and the electronic control board. The fluid flowing into the third cavity exchanges heat with the electronic control board through the first heat-conducting component and the second heat-conducting component.

8. The electronic oil pump according to claim 6, characterized in that, The first cavity includes a first sub-cavity connected to the inlet and a second sub-cavity connected to the outlet. The first housing includes a bottom plate for isolating the first cavity and the second cavity. The bottom plate has an opening. The second cavity, the opening, the first sub-cavity and the second sub-cavity are connected in sequence. The first driving component and the second driving component are further configured to drive the fluid from the second cavity through the opening, the first sub-cavity and the second sub-cavity 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 cavity. The guide post connects the first cavity and the second cavity. 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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