CN115111154A

CN115111154A - Electronic oil pump

Info

Publication number: CN115111154A
Application number: CN202110860993.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2021-03-18
Filing date: 2021-07-29
Publication date: 2022-09-27

Abstract

An electronic oil pump includes a first housing having at least a portion of a first cavity and a first rotor assembly located in the first cavity; the electronic oil pump comprises a pump cover, the pump cover is fixedly connected with the first shell, at least part of the pump cover covers the first rotor assembly, and the electronic oil pump is provided with a flow inlet channel which is communicated with the first cavity; the electronic oil pump further comprises a filtering piece, the filtering piece is located at the upstream of the inflow channel or located at the inflow channel, and the filtering piece is fixedly connected with the pump cover, so that impurities can be filtered from a working medium entering the first cavity, and the influence of the impurities on the performance of the electronic oil pump is reduced.

Description

Electronic oil pump

Technical Field

The present application relates to the field of vehicles, and more particularly to components of a vehicle lubrication system and/or cooling system.

Background

The electronic oil pump mainly provides a power source for a lubricating system and/or a cooling system of a vehicle, the internal structure of the electronic oil pump generally comprises a rotor assembly, impurities can be accumulated on the rotor assembly when the electronic oil pump works, so that the working performance of the electronic oil pump is influenced, and therefore how to reduce the influence of the impurities on the performance of the electronic oil pump is the problem to be considered in the design process.

Disclosure of Invention

The application provides an electronic oil pump is favorable to reducing the influence that impurity caused to electronic oil pump performance.

In order to achieve the above purpose, one embodiment of the present application adopts the following technical solutions:

an electronic oil pump comprising a first housing having at least part of a first cavity and a first rotor assembly located in the first cavity; the electronic oil pump comprises a pump cover, the pump cover is fixedly connected with the first shell, at least part of the pump cover covers the first rotor assembly, the electronic oil pump is provided with a flow inlet channel, and the flow inlet channel is communicated with the first cavity; the electronic oil pump further comprises a filter element, the filter element is located at the upstream of the inflow channel or at the inflow channel, and the filter element is fixedly connected with the pump cover or in a limiting manner.

In this way, make to filter and can carry out impurity filtering to the working medium that flows into first chamber, thereby be favorable to reducing impurity and get into first chamber, because first rotor subassembly is located first chamber, be favorable to preventing impurity influence first rotor subassembly's rotation like this, thereby be favorable to preventing that first rotor subassembly can not normal operating because of piling up of impurity, and then be favorable to reducing the influence that impurity caused the electronic oil pump performance.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of an electronic oil pump of the present application;

FIG. 2 is a cross-sectional view of the first embodiment of the electronic oil pump of FIG. 1;

FIG. 3 is a schematic diagram of a top view of the electronic oil pump of FIG. 1 with the pump cover removed;

FIG. 4 is a schematic perspective view of a pump cover at two different viewing angles;

FIG. 5 is a cross-sectional schematic view of the pump cap of FIG. 4;

FIG. 6 is a schematic perspective view of the filter and pump cap combination;

FIG. 7 is a cross-sectional view of the filter and pump cap combination;

FIG. 8 is an enlarged view of a portion of the first embodiment of section A of FIG. 7;

FIG. 9 is an enlarged view of a portion of the second embodiment of section A of FIG. 7;

FIG. 10 is an enlarged view of a portion of the third embodiment of section A of FIG. 7;

FIG. 11 is an enlarged view of a portion of the fourth embodiment of section A of FIG. 7;

fig. 12 is a perspective view of the first embodiment of the filter element;

figure 13 is a schematic top view of the first embodiment of the filter pack;

FIG. 14 is a schematic cross-sectional view of the filter element of FIG. 13 taken along line A-A;

fig. 15 is a schematic sectional view of the second embodiment of the filter member.

Detailed Description

The present application is further described with reference to the following figures and specific examples:

the electronic oil pump in the following embodiments is mainly capable of providing flowing power for a working medium of a vehicle lubrication system and/or a cooling system, and particularly capable of providing flowing power for a working medium of a lubrication system and/or a cooling system in a vehicle transmission system.

Referring to fig. 1 and 2 in combination, the electronic oil pump 100 includes a pump housing, a first rotor assembly 2, a second rotor assembly 3, a stator assembly 4, and a circuit board assembly 6; the pump housing can form a pump inner cavity, the first rotor assembly 2, the second rotor assembly 3, the stator assembly 4 and the circuit board assembly 6 are disposed in the pump inner cavity, in this embodiment, the pump inner cavity includes a first cavity 70, a second cavity 80 and a third cavity 90, the first rotor assembly 2 is located in the first cavity 70, the second rotor assembly 3 and the stator assembly 4 are located in the second cavity 80, and the circuit board assembly 6 is located in the third cavity 90, wherein the first cavity 70 is disposed in communication with the second cavity 80, and the second cavity 80 is not in communication with the third cavity 90; the electronic oil pump 100 further has a flow inlet channel 11, the flow inlet channel 11 is communicated with the first cavity 70, and the working medium can enter the first cavity 70 through the flow inlet channel 11 and then enter the second cavity 80 from the first cavity 70, so that the first rotor assembly 2, the second rotor assembly 3 and the stator assembly 4 can work normally.

Specifically, the pump housing includes a pump cover 1, a first housing 7, and a second housing 8, and a portion of the pump cover 1 is located above the first housing 7 and a portion of the first housing 7 is located between the pump cover 1 and the second housing 8 in a height direction of the electronic oil pump 100, where in the present embodiment, the intake passage 11 is formed in the pump cover 1, and the first cavity 70 and the second cavity 80 are formed in the first housing 7, but of course, in other embodiments, the first cavity 70 and the second cavity 80 may also be formed in part in the first housing 7. Therefore, the intake passage 11 is located above the first chamber 70, the first chamber 70 is located above the second chamber 80, and the first rotor assembly 2 is located in the first chamber 70 in the height direction of the electronic oil pump 100, so that the pump cover 1 can cover the first rotor assembly 2, but of course, in other embodiments, the pump cover 1 may cover only a part of the first rotor assembly 2. The electronic oil pump 100 further includes a partition 708, a portion of the partition 708 is located between the first housing 7 and the second housing 8 along a height direction of the electronic oil pump 100, the second rotor assembly 3 and the stator assembly 4 are located on one side of the partition 708, the circuit board assembly 6 is located on the other side of the partition 708, and a cavity formed between the partition 708 and the second housing 8 includes the third cavity 90, as shown in fig. 2. Be provided with seal structure between separator 708 and the pump casing, the working medium in the second chamber 80 can not flow to third chamber 90 through separator 708, is favorable to preventing like this that the working medium from getting into circuit board assembly 6 place side to be favorable to preventing that the working medium from causing the influence to circuit board assembly 6's performance, and then influence the performance of electronic oil pump.

Referring to fig. 1 and fig. 2 in combination, the pump cover 1 and the first housing 7 are fixedly connected relatively, specifically, in the present embodiment, the pump cover 1 and the first housing 7 are connected by screws or bolts, which makes the electronic oil pump more convenient to disassemble and assemble, thereby facilitating the maintenance of the first rotor assembly 2, and of course, the pump cover 1 and the first housing 7 may also be connected by other manners, such as inserting, clamping, and the like; the first casing 7 and the second casing 8 are connected by screws or bolts, and specifically, in the present embodiment, a part of the spacer 708 is fixed between the first casing 7 and the second casing 8, and the screws or bolts sequentially pass through the first casing 7, the spacer 708 and the second casing 8, so that the first casing 7 and the second casing 8 are indirectly fixedly connected, as shown in fig. 1. Of course, in other embodiments, the first housing 7 and the second housing 8 may also be directly fixedly connected by screws or bolts, and the structure of the partition 708 may also be changed accordingly, for example, but not limited to, the partition 708 may be positioned and fixed by interference fit with the inner peripheral wall of the first housing 7; first casing 7 and second casing 8 are favorable to making the dismouting of electronic oil pump more convenient through the mode of screw or bolted connection, and in this embodiment, because circuit board assembly 6 is located the cavity between separator 708 and second casing 8, still be favorable to the maintenance of circuit board assembly 6 among the electronic oil pump like this, on the other hand can also make the connection of first casing 7 and second casing 7 more reliable.

Referring to fig. 2 and 3 in combination, the first rotor assembly 2 includes a first rotor 21 and a second rotor 22, the first rotor assembly 21 includes a plurality of internal teeth, the second rotor assembly 22 includes a plurality of external teeth, a hydraulic pressure chamber 701 is provided between the internal teeth of the first rotor assembly 21 and the external teeth of the second rotor assembly 22, in this embodiment, the hydraulic pressure chamber 701 is also a part of the first chamber 70, and the first rotor 21 is sleeved on the outer periphery of the second rotor 22. The electronic oil pump 100 further comprises an outflow channel 12, working medium can enter the hydraulic cavity 701 through the inflow channel 11, and the working medium can leave the hydraulic cavity 701 through the outflow channel 12; because a certain eccentricity exists between the first rotor 21 and the second rotor 22, when the second rotor 22 rotates, part of external teeth of the second rotor 22 are meshed with part of internal teeth of the first rotor 21, so as to drive the first rotor 21 to rotate, during one rotation of the first rotor 21 and the second rotor 22, the volume of the hydraulic chamber 701 changes, specifically, when the first rotor assembly 2 rotates to a certain angle from the beginning, the volume in the hydraulic chamber 701 gradually increases, so as to form a partial vacuum, the working medium is sucked into the hydraulic chamber 701 from the inflow channel 11, and when the first rotor 21 and the second rotor 22 continue to rotate, the volume of the hydraulic chamber 701 originally filled with the working medium gradually decreases, the working medium is squeezed, so that the working medium entering the hydraulic chamber 701 is squeezed out to the outflow channel 12, so as to generate flowing power.

Referring to fig. 2 in combination, the stator assembly 4 includes a stator core 41, an insulating frame 42 and a winding 43, the insulating frame 42 at least covers at least a part of the surface of the stator core 41, and the winding 43 is wound around the insulating frame 42; the circuit board assembly 6 has a control function, when the electronic oil pump 100 works, the circuit board assembly 6 controls the current passing through the winding 43 of the stator assembly 4 to change according to a predetermined rule, so as to control the stator assembly 4 to generate a changing excitation magnetic field, the second rotor assembly 3 has a magnetic pole, the second rotor assembly 3 rotates under the action of the excitation magnetic field, the second rotor assembly 3 can directly or indirectly drive the first rotor assembly 2 to rotate, specifically, in the present embodiment, the electronic oil pump 100 further includes a pump shaft 15, the pump shaft 15 is fixedly connected or in a limit connection with the second rotor assembly 3, the pump shaft 15 can rotate along with the second rotor assembly 3, the pump shaft 15 can drive a part of the first rotor assembly 2 to rotate, the pump shaft 15 can specifically drive the second rotor 22 to rotate, one end of the pump shaft 15 is connected with the second rotor assembly 22 along the axial direction of the pump shaft 15, and the other opposite end of the pump shaft 15 is connected with the second rotor assembly 3, the second rotor assembly 3 rotates the second rotor 22 through the pump shaft 15, thereby achieving rotation of the first rotor assembly 2. In this embodiment, at least a portion of the working medium in the first cavity 70 can flow into the second cavity 80, and since the stator assembly 4 is located in the second cavity 80, the working medium located in the second cavity 80 can cool the stator assembly 4, thereby facilitating heat dissipation from the stator assembly 4.

Referring to fig. 4 and 5 in combination, the pump cover 1 has an accommodating cavity 10, in this embodiment, an inlet channel 11 and an outlet channel 12 are formed in the pump cover 1, the accommodating cavity 10 is located above the inlet channel 11, the accommodating cavity 10 communicates with the outside of the electronic oil pump and the inlet channel 11, and the inlet channel 11 communicates with the accommodating cavity 10 and the first cavity 70. Specifically, in the height direction of the pump cover 1, the accommodation chamber 10 is formed with an opening on the upper wall of the pump cover 1, and the accommodation chamber 10 is recessed with respect to the upper wall of the pump cover 1; the inlet channel 11 is formed as a through hole, and along the height direction of the pump cover 1, one end of the inlet channel 11 is provided with an opening on the bottom wall of the accommodating cavity 10, and the other end of the inlet channel 11 is provided with an opening on the lower wall of the pump cover 1; the outlet channel 12 does not extend through the pump cap 1, and the outlet channel 12 is recessed with respect to the lower wall of the pump cap 1 and the side wall of the pump cap 1. The inlet channel 11 is located between the accommodating cavity 10 and the first cavity 70, and the inlet channel 11 communicates the accommodating cavity 10 with the first cavity 70, so that the accommodating cavity 10 is located upstream of the inlet channel 11, the working medium entering the electronic oil pump 100 can firstly enter the electronic oil pump 100 through the accommodating cavity 10, part of the working medium enters the first cavity 70 through the inlet channel 11, and then part of the working medium flows out of the first cavity 70 through the outlet channel 12.

Referring to fig. 2 in combination, the electronic oil pump 100 includes a filter element 5, the filter element 5 is capable of filtering impurities in a fluid, in this embodiment, the filter element 5 is fixedly connected or limited to the pump cover 1, and the filter element 5 is located upstream of the inlet channel 11 along the height direction of the pump cover 1, so that a working medium entering the inlet channel 11 is filtered by the filter element 5 and then enters the first cavity 70 of the electronic oil pump through the inlet channel 11, which is beneficial to reducing impurities in the working medium entering the first cavity 70 and affecting the operation of the first rotor assembly 2, and furthermore, because the first cavity 70 is communicated with the second cavity 80, it is beneficial to reducing impurities in the working medium entering the second cavity 80 and affecting the operation of the second rotor 3, thereby improving the working performance of the electronic oil pump 100.

With combined reference to fig. 6 and fig. 7, in the present embodiment, the filtering element 5 is located in the accommodating cavity 10 of the pump cover 1, and the filtering element 5 is matched and connected in a limiting manner with the inner peripheral wall corresponding to the accommodating cavity 10, so that the filtering element 5 and the pump cover 1 are relatively fixed; of course, in other embodiments, the filter element 5 may be only partially located in the accommodating cavity 10 of the pump cover 1, and a part of the outer peripheral wall of the filter element 5 is disposed to match with a part of the inner peripheral wall corresponding to the accommodating cavity 10, which will not be described in detail herein. Because the accommodating cavity 10 is arranged at the upstream of the inlet channel 11, the working medium can firstly pass through the accommodating cavity 10 before passing through the inlet channel 11, and therefore, impurities in the working medium can be filtered by the filtering piece 5 arranged in the accommodating cavity 10, the impurities in the working medium passing through the accommodating cavity 10 can be reduced to enter the inlet channel 11 and then enter the first cavity 70, and the operation influence of the first rotor assembly 2 arranged in the first cavity 70 can be improved.

Referring to fig. 8 in combination, in an embodiment, the filter element 5 is connected to the pump cap 1 by interference fit or transition fit, specifically, the outer peripheral wall of the filter element 5 is tightly fitted with the inner peripheral wall of the accommodating cavity 10, where "tight fit" refers to that tight connection is achieved by interference fit or transition fit of the two, and of course, in other embodiments, part of the outer peripheral wall of the filter element 5 may be tightly fitted with part of the inner peripheral wall of the accommodating cavity 10, which is not described in detail here.

Referring to fig. 9 in combination, in other embodiments, the filter element 5 is fixedly connected with the pump cover 1 through a thread fit mode, specifically, the outer peripheral wall of the filter element 5 is provided with an external thread 591, the inner peripheral wall corresponding to the accommodating cavity 10 is provided with an internal thread 191, and the filter element 5 is fixedly connected with the pump cover 1 through the thread fit of the external thread 591 and the internal thread 191.

Referring to fig. 10 in combination, in other embodiments, the filter member 5 is fixedly connected with the pump cover 1 in a snap fit manner, specifically, the filter member 5 includes a first convex portion 592, the pump cover 1 has a first concave portion 192, wherein the first convex portion 592 is formed on the peripheral wall of the filter member 5, and the first convex portion 592 is convex relative to the peripheral wall of the filter member 5; the first recess 192 is formed in the inner peripheral wall corresponding to the accommodation chamber 10, and the first recess 192 is recessed with respect to the inner peripheral wall corresponding to the accommodation chamber 10. The first protrusion 592 is located in the cavity of the first recess 192, and the first protrusion 592 is engaged with the first recess 192, so that the filter member 5 is fixedly connected to the pump cap 1. In the present embodiment, the first protrusions 592 are disposed along the outer peripheral wall of the filter member 5 in a discrete distribution, and the first recesses 192 are disposed along the inner peripheral wall of the receiving cavity 10 in a discrete distribution, but in other embodiments, the first protrusions 592 and the first recesses 192 may be disposed along the respective peripheral walls in a continuous distribution, and will not be described in detail herein.

Referring to fig. 11 in combination, in other embodiments, the filter member 5 and the pump cover 1 are fixedly connected by means of thermal fusion, specifically, the pump cover 1 is made of a non-metal material, a material corresponding to a portion of the filter member 5 used for being connected with the pump cover 1 is also made of a non-metal material, the outer peripheral wall of the filter member 5 has a first mating surface 593, the inner peripheral wall corresponding to the accommodating cavity 10 has a second mating surface 193, the first mating surface 593 and the second mating surface 193 are heated to a molten state to mate the first mating surface 593 and the second mating surface 193 together and be cooled, so that the outer peripheral wall of the filter member 5 and the inner peripheral wall corresponding to the accommodating cavity 10 are connected into a whole, the two complete thermal fusion, and the filter member 5 and the pump cover 1 are fixedly connected.

Referring to fig. 12, 13 and 14 in combination, the filter element 5 includes a filter portion 51 and a support portion 52, in this embodiment, the filter portion 51 is a filter net for filtering impurities in the working medium, the support portion 52 is an injection molded part, in this embodiment, the support portion 52 is formed by insert molding the filter portion 51 formed by the filter net, and the peripheral wall of the support portion 52 forms the peripheral wall of the filter element 5, of course, in other embodiments, part of the support portion 52 may be formed by insert molding the filter portion 51 formed by the filter net, and the support portion 52 may include a non-injection molded part, and similarly, only part of the peripheral wall of the support portion 52 may form the peripheral wall of the filter element 5, which will not be described in detail herein. In the present embodiment, the support portion 52 is used for fixedly supporting the filter screen on the one hand and connecting the pump cover 1 on the other hand, so that the filter element 5 is more conveniently fixed in the accommodating cavity 10 due to the support portion 52.

With reference to fig. 12, 13 and 14, in particular, in the present embodiment, the support portion 52 includes a main body 521 and a connecting portion 522, the connecting portion 522 is located on an inner periphery of the main body 521, the main body 521 and the connecting portion 522 are connected into a whole, and the connecting portions 522 are continuously distributed along an inner peripheral wall of the main body 521, in this embodiment, a height of the main body 521 is greater than a height of the connecting portion 522, and an outer peripheral wall of the main body 521 forms an outer peripheral wall of the filter element 5, which is beneficial to increasing an area of the outer peripheral wall of the filter element 5, and is further beneficial to increasing a matching area of the filter element 5 and the inner peripheral wall corresponding to the accommodating cavity 10, so that the fixed connection of the filter element 5 and the accommodating cavity 10 is more stable; with reference to fig. 12 and 13, the lower end of the main body 521 abuts against the bottom wall of the accommodation chamber 10, which facilitates the positioning of the filter member 5 in the height direction during installation. In the present embodiment, the connection portion 522 is disposed around the filter portion 51, or a part of the connection portion 522 is disposed around the filter portion 51, and it can also be understood that the connection portions 522 are disposed continuously along the circumferential direction of the filter portion 51, and a part of the filter portion 51 is embedded in the connection portion 522, so that the filter portion 51 is fixedly connected to the connection portion 522, as shown in fig. 14. Of course, in other embodiments, the support portion 52 may not include the main body portion 521, and the outer peripheral wall of the connecting portion 522 may form the outer peripheral wall of the filter member 5, as shown in fig. 15, which is advantageous in reducing the structural weight of the filter member 5. As shown in fig. 14, the broken line in the figure is a man-made division of the main body 521 and the connecting portion 522, and is intended to understand the structural relationship between the main body 521 and the connecting portion 522.

With reference to fig. 12, 13 and 14, in this embodiment, the support portion 52 further includes a reinforcing rib 523, the reinforcing rib 523 is located on the inner periphery of the connecting portion 522, the reinforcing rib 523 has two end portions, and the two end portions of the reinforcing rib 523 are connected with the inner peripheral wall of the connecting portion 522 by injection molding, so that the reinforcing rib 523 can support the inner periphery of the connecting portion 522, which is beneficial to improving the overall structural strength of the injection-molded part support portion 52. In the present embodiment, the reinforcing ribs 523 are supported on both the upper surface and the lower surface of the filter part 51, and the reinforcing rib defining one surface is the first reinforcing rib 5231 and the reinforcing rib on the other surface is the second reinforcing rib 5232, or in the height direction of the filter member 5, the first reinforcing rib 5231 and the second reinforcing rib 5232 are respectively positioned on the upper and lower sides of the filter part 51, as shown in fig. 12. In this embodiment, the reinforcing ribs 523 include two first reinforcing ribs 5231 and two second reinforcing ribs 5232, which are arranged to cross each other, but it should be understood that the reinforcing ribs 523 may be supported on one of the upper and lower surfaces of the filter part 551 in other embodiments, and the structural form and number of the reinforcing ribs 523 may be variously modified. In this embodiment, the stability of the structure of the filter part 51 is improved by the arrangement of the reinforcing ribs, so that the filter part 51 is not easy to fall off due to the impact of the working medium in the filtering process.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features of the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. An electronic oil pump comprising a first housing having at least part of a first cavity and a first rotor assembly located in the first cavity; the electronic oil pump comprises a pump cover, the pump cover is fixedly connected with the first shell, at least part of the pump cover covers the first rotor assembly, the electronic oil pump is provided with a flow inlet channel, and the flow inlet channel is communicated with the first cavity; the electronic oil pump is characterized by further comprising a filtering piece, wherein the filtering piece is located at the upstream of the inflow channel or at the inflow channel, and the filtering piece is fixedly connected with the pump cover or in a limiting manner.

2. The electronic oil pump of claim 1, wherein: and at least taking the filter element as an insert to form the pump cover through injection molding.

3. The electronic oil pump according to claim 1 or 2, characterized in that the pump cover has an accommodation chamber that has an opening at an upper wall of the pump cover, the accommodation chamber being recessed relative to the upper wall of the pump cover in a height direction of the pump cover; the inlet channel is formed in the pump cover, the inlet channel is communicated with the accommodating cavity and the first cavity, and at least part of the filtering piece is positioned in the accommodating cavity.

4. The electronic oil pump of claim 3, wherein at least a portion of the outer peripheral wall of the filter member is engaged with and in limited connection with at least a portion of the inner peripheral wall of the accommodating chamber.

5. The electronic oil pump according to claim 4, wherein at least a portion of an outer peripheral wall of the filter member is in interference fit or transition fit with at least a portion of an inner peripheral wall of the accommodating cavity so that the filter member is fixedly connected with the pump cover.

6. The electronic oil pump according to claim 4, wherein an outer peripheral wall of the filter member has an external thread, and an inner peripheral wall corresponding to the accommodation chamber has an internal thread; the external thread and the internal thread are matched through threads, so that the filter piece is fixedly connected with the pump cover.

7. The electronic oil pump according to claim 4, wherein the filter member includes a first protrusion protruding from an outer peripheral wall of the filter member, the first protrusion being continuously or discretely distributed along the outer peripheral wall of the filter member; the pump cover is provided with a first concave part, the first concave part is sunken relative to the inner peripheral wall corresponding to the accommodating cavity, and the first concave part is continuously or discretely distributed along the inner peripheral wall corresponding to the accommodating cavity; at least part of the first convex part is positioned in the cavity of the first concave part, and the first convex part is tightly matched with the first concave part so that the filter element is connected with the pump cover.

8. The electronic oil pump of claim 4, wherein the pump cover is made of a non-metallic material, and the filter element is made of a non-metallic material at a portion thereof to be connected to the pump cover; at least part of the outer peripheral wall of the filter element is in hot melt connection with at least part of the inner peripheral wall corresponding to the accommodating cavity.

9. The electronic oil pump according to any one of claims 1 to 8, wherein the filter member includes a filter portion and a support portion, the filter member is a filter mesh, the support portion is an injection-molded member, and the support portion is formed by injection-molding at least the filter portion as an insert; at least part of the outer peripheral wall of the support portion constitutes the outer peripheral wall of the filter member.

10. The electronic oil pump according to claim 9, wherein the support portion includes a main body portion and a connecting portion, the connecting portion is located on an inner periphery of the main body portion, the connecting portion is integrally connected to the main body portion, and the connecting portions are continuously distributed along an inner peripheral wall of the main body portion;

at least part of the connecting part is arranged around the filter part, and part of the filter part is embedded into the connecting part.

11. The electronic oil pump according to claim 9 or 10, wherein the support portion includes a reinforcing rib located at an inner periphery of the connecting portion, the reinforcing rib having two end portions, the two end portions of the reinforcing rib being integrally connected to an inner peripheral wall of the connecting portion;

the reinforcing rib is supported on at least one of the upper surface and the lower surface of the filter part.