Filtering device, oil pump assembly, motor assembly and vehicle

Abstract

The invention provides a filtering device, an oil pump assembly, a motor assembly and a vehicle, the filtering device comprises a support, the support is provided with an oil injection cavity, the support is provided with an oil inlet, the oil inlet is communicated with the oil injection cavity, the oil inlet is used for being communicated with an oil outlet of an oil pump, and the oil injection cavity is provided with an oil passing port; the filtering structure is arranged on the support and surrounds the oil injection cavity, and the threaded connection structure is arranged on the support and used for being detachably connected with an oil pump. In other words, before assembly, the oil pump and the filtering device are connected to form an assembly. Due to the fact that the filtering device is connected to the oil pump in advance, foreign matter cannot enter the connecting position of the oil pump and the filtering device in the transportation process, the cleanliness in the filtering device is guaranteed, the cleanliness of an oil way for oil circulation can be guaranteed in the follow-up assembling process, and the oil pump is prevented from being clamped.

Description

Technical Field

[0001] The present invention relates to the technical field of motor cooling, and particularly relates to a filtering device, an oil pump assembly, a motor assembly and a vehicle. Background Art

[0002] As a core component of new energy vehicles, the performance and reliability of the motor are particularly important. During operation, the motor needs to be maintained within a reasonable temperature range, and a large amount of heat is generated during the operation of the vehicle. Therefore, it is necessary to cool down the motor. At the same time, the motor also needs to be supplied with oil to ensure the smooth operation of each component. In the prior art, an oil pump is usually added to drive the oil circulation in the motor to achieve the functions of cooling and lubricating the motor. However, due to the difficulty in ensuring the cleanliness of each part of the motor itself during machining, and foreign matters such as metal chips are also generated during the operation of the motor itself, these foreign matters are likely to enter the gap between the inner and outer rotors of the oil pump, resulting in the oil pump being stuck. Once the oil pump fails, it will cause the motor temperature to be too high, restricting its power at best, and at worst, causing the motor to be scrapped or even leading to traffic accidents.

[0003] To solve the above problems, a filter screen is added to the oil circuit in the prior art, and the filter screen is separately assembled on the outer shell of the motor. However, during transportation, foreign matters are likely to enter the oil outlet of the motor or the filter screen, resulting in the presence of foreign matters in the oil circuit after the motor, the oil pump and the filter screen are assembled, that is, the above problems cannot be completely avoided. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that foreign matters are likely to enter the oil pump and the filter screen in the prior art, resulting in the oil pump being stuck during the operation of the motor, so as to provide a filtering device, an oil pump assembly, a motor assembly and a vehicle.

[0005] To solve the above problems, the present invention provides a filtering device, including: a bracket, the bracket has an oil injection cavity, an oil inlet is arranged on the bracket, the oil inlet is communicated with the oil injection cavity, and the oil inlet is used for being communicated with the oil outlet of the oil pump, and an oil passing port is arranged in the oil injection cavity; a filtering structure, arranged on the bracket and surrounding the oil injection cavity; a threaded connection structure, arranged on the bracket, and the threaded connection structure is used for detachably connecting with the oil pump.

[0006] Optionally, the bracket includes a cylindrical part and a first end part and a second end part arranged at both ends of the cylindrical part, the space inside the cylindrical part forms the oil injection cavity, the oil passing port is arranged on the side wall of the cylindrical part, and the filtering structure is arranged around the outside of the cylindrical part.

[0007] Optionally, a through hole is arranged on the first end part, the through hole is communicated with the first end of the cylindrical part, the through hole forms the oil inlet, the second end of the cylindrical part is connected with the second end part, and the second end part closes the second end of the cylindrical part.

[0008] Optionally, reinforcing ribs are provided on the first end portion, and the reinforcing ribs are located outside the through hole.

[0009] Optionally, the threaded connection structure is provided on the outer side wall of the first end portion.

[0010] Optionally, a sealing structure is provided on the outer side wall of the first end portion, and the sealing structure is used for sealing cooperation with the oil outlet of the oil pump.

[0011] Optionally, the filtering structure includes filter paper. The filter paper is in a cylindrical shape and is disposed around the outside of the cylindrical portion. The two ends of the filter paper are respectively matched with the first end portion and the second end portion.

[0012] The present invention also provides an oil pump assembly, which includes an oil pump body and the above-mentioned filtering device. The oil pump body includes an oil outlet, and the filtering device is detachably connected to the oil outlet through the threaded connection structure.

[0013] The present invention also provides a motor assembly, which includes a motor body and the above-mentioned oil pump assembly. The motor body includes a cavity and an installation port communicated with the cavity. The oil pump assembly is installed at the installation port, and the filtering device is located in the cavity.

[0014] The present invention also provides a vehicle, which includes the above-mentioned motor assembly.

[0015] The present invention has the following advantages:

[0016] With the technical solution of the present invention, when the filtering device is in use, the oil outlet of the oil pump discharges the oil fluid, the oil fluid enters the oil injection cavity of the bracket, and then the oil fluid is discharged from the oil passing port. After the oil fluid is discharged from the oil passing port, it is filtered through the filtering structure, and the filtered oil fluid enters the motor, thereby playing a role in cooling and lubricating the motor. Further, a threaded connection structure is provided on the bracket, so the bracket can be connected to the oil pump through the threaded connection structure, that is, before assembly, the oil pump and the filtering device are connected to form an assembly. Since the filtering device is pre-connected to the oil pump, foreign matters cannot enter the connection position between the oil pump and the filtering device during transportation, that is, the cleanliness of the inside of the filtering device is ensured, and the cleanliness of the oil circulation oil path can also be ensured during the subsequent assembly process, preventing the oil pump from getting stuck. Therefore, the technical solution of the present invention solves the problem that foreign matters are likely to enter the oil pump and the filter screen in the prior art, resulting in the oil pump getting stuck during the operation of the motor. Description of the Drawings

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 The structural schematic diagram of the filtering device of the present invention is shown;

[0019] Figure 2 Shown is Figure 1 The schematic diagram of the filtering structure of the filtering device in

[0020] Figure 3 Shown is Figure 1 The structural schematic diagram of the bracket of the filtering device in

[0021] Figure 4 Shown is Figure 3 The cross-sectional view of the bracket in

[0022] Figure 5 The structural schematic diagram of the oil pump assembly of the present invention is shown;

[0023] Figure 6 Shown is Figure 5 The cross-sectional view of the oil pump assembly in

[0024] Figure 7 Shown is Figure 5 The structural schematic diagram of the oil pump body of the oil pump assembly in

[0025] Explanation of reference numerals:

[0026] 10, bracket; 11, oil injection chamber; 111, oil passing port; 12, oil inlet; 13, cylindrical part; 131, first end; 132, second end; 14, first end part; 141, through hole; 142, reinforcing rib; 15, second end part; 20, filtering structure; 30, threaded connection structure; 40, sealing structure; 50, oil pump body; 51, oil outlet. Specific embodiments

[0027] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] As Figures 1 to 4 shown, an embodiment of the filtering device according to the present application includes a bracket 10, a filtering structure 20, and a threaded connection structure 30. Among them, the bracket 10 has an oil injection cavity 11, and an oil inlet 12 is provided on the bracket 10. The oil inlet 12 communicates with the oil injection cavity 11. And the oil inlet 12 is used to communicate with the oil outlet of an oil pump, and an oil passing port 111 is provided in the oil injection cavity 11. The filtering structure 20 is provided on the bracket 10 and is arranged around the oil injection cavity 11. The threaded connection structure 30 is provided on the bracket 10, and the threaded connection structure 30 is used for detachably connecting with the oil pump.

[0032] Using the technical solution of this embodiment, when the filtering device is in use, the oil outlet of the oil pump discharges oil fluid, and the oil fluid enters the oil injection cavity 11 of the bracket 10, and then the oil fluid discharges from the oil passing port 111. After the oil fluid discharges from the oil passing port 111, it is filtered through the filtering structure 20, and the filtered oil fluid enters the motor, thereby playing a role in cooling and lubricating the motor. Further, a threaded connection structure 30 is provided on the bracket 10, so that the bracket 10 can be connected to the oil pump through the threaded connection structure 30, that is, before assembly, the oil pump and the filtering device are connected to form an assembled part. Since the filtering device is pre-connected to the oil pump, foreign matters cannot enter the connection position between the oil pump and the filtering device during transportation, that is, the cleanliness inside the filtering device is ensured, and the cleanliness of the oil circulation oil path can also be ensured during the subsequent assembly process, preventing the oil pump from getting stuck. Therefore, the technical solution of this embodiment solves the problem in the prior art that foreign matters easily enter the oil pump and the filter screen, resulting in the oil pump getting stuck during the operation of the motor.

[0033] As Figure 3 and Figure 4 shown, the function of the bracket 10 is to support the filtering structure 20 and install the filtering structure 20 on the oil pump. Further, an oil injection cavity 11 is provided inside the bracket 10, and an oil passing port 111 is also provided on the bracket 10, and the oil passing port is connected to the oil outlet of the oil pump. When the oil pump is working, the oil fluid discharges from the oil outlet and enters the oil injection cavity 11 through the oil passing port 111.

[0034] Further, a filtering structure 20 is also provided on the bracket 10. The filtering structure 20 is arranged around the oil injection cavity 11. After the oil fluid in the oil injection cavity 11 discharges from the oil passing port 111, it is filtered through the filtering structure 20, and the filtered oil fluid enters the motor to lubricate or cool the motor.

[0035] Further, a threaded connection structure 30 is also provided on the bracket. The threaded connection structure 30 is used to connect to the oil pump. In this way, the filtering device and the oil pump can be connected as an assembled part before assembly. During transportation, foreign matters cannot enter the connection between the oil pump and the filtering device, that is, the oil outlet of the oil pump and the inside of the filtering device are kept clean. During the subsequent assembly process, this assembled part (oil pump plus filtering device) is directly assembled on the motor, so it can be ensured that there are no foreign matters during transportation in the circulating oil path, preventing the oil pump from getting stuck during the subsequent operation process.

[0036] In addition, when the filtering structure 20 fails and needs to be maintained and replaced, the threaded connection structure 30 also facilitates the removal of the filtering structure 20 from the oil pump and the installation of the filtering structure 20 on the oil pump.

[0037] Optionally, the threaded connection structure 30 can be an external thread or an internal thread.

[0038] like Figure 3 and Figure 4 As shown, in the technical solution of this embodiment, the bracket 10 includes a barrel 13 and a first end 14 and a second end 15 arranged at both ends of the barrel 13. The space inside the barrel 13 forms an oil filling chamber 11, the oil port 111 is arranged on the side wall of the barrel 13, and the filtering structure 20 is arranged around the outside of the barrel 13.

[0039] Specifically, from Figure 3 It can be seen that the first end 14 and the second end 15 are both in a pancake-shaped structure, and both are in a round pancake-shaped structure. The barrel 13 is a hollow barrel-shaped structure, and the internal space of the barrel 13 forms the above-mentioned oil injection cavity 11, and the two ends of the barrel are respectively connected to the first end 14 and the second end 15. Figure 3 It can also be seen that the above-mentioned oil passage port 111 is provided on the side wall of the cylinder portion 13 .

[0040] Furthermore, the oil passage opening 111 is a through hole formed on the side wall of the barrel 13, that is, the oil passage opening 111 passes through the inner space and the outer space of the barrel 13. The oil passage opening 111 is arranged in multiple groups, and the multiple groups of oil passage openings 111 are distributed along the circumference of the barrel 13 at intervals, and each group of oil passage openings 111 includes multiple oil passage openings 111 distributed along the axial direction of the barrel 13. That is, the multiple oil passage openings 111 are distributed in a horizontal and vertical array.

[0041] Of course, the specific number and arrangement of the oil ports 111 can be adaptively adjusted by those skilled in the art according to actual needs.

[0042] Further, from Figure 3 It can also be seen that the outer diameters of the first end 14 and the second end 15 are both larger than the outer diameter of the barrel 13, and along the axial direction of the stent 10, the length of the barrel 13 is larger than the lengths of the first end 14 and the second end 15. The first end 14, the second end 15 and the barrel 13 are coaxially arranged, so the first end 14, the second end 15 and the barrel 13 form a similar "I"-shaped structure.

[0043] Furthermore, the filtering structure 20 mentioned above surrounds the outer side of the cylinder 13 , so the oil discharged from the oil outlet 111 is filtered by the filtering structure 20 and then discharged from the side of the filtering device.

[0044] like Figure 4 and Figure 5 As shown, in the technical solution of this embodiment, a through hole 141 is provided on the first end 14, the through hole 141 is connected to the first end 131 of the barrel 13, the through hole 141 forms the oil inlet 12, the second end 132 of the barrel 13 is connected to the second end 15, and the second end 15 closes the second end 132 of the barrel 13.

[0045] As Figure 4 shown, the first end 131 of the cylindrical portion 13 is the Figure 4 upper end in the direction shown, and the second end 132 of the cylindrical portion 13 is the Figure 4 lower end in the direction shown. A through hole 141 is provided on the first end portion 14. The through hole 141 penetrates through two opposite surfaces of the first end portion 14, and the through hole 141 communicates with the space inside the cylindrical portion 13. Therefore, the through hole 141 forms the above-mentioned oil inlet 12.

[0046] From Figure 4 it can also be seen that no through hole structure is provided on the second end portion 15. Therefore, the second end portion 15 closes the second end 132 of the cylindrical portion 13, that is, the cylindrical portion 13 is a hollow cylindrical structure with one end open.

[0047] Furthermore, the above-mentioned first end portion 14 is connected to the oil outlet of the oil pump. Therefore, the through hole 141 is connected to the oil outlet of the oil pump, that is, the oil outlet of the oil pump is directly communicated with the space inside the cylindrical portion 13. When the oil pump works, the oil flowing out from the oil outlet directly flows into the cylindrical portion 13, that is, into the oil injection cavity 11, and then the oil flows outwards from the oil passing hole 111 on the side wall of the cylindrical portion 13.

[0048] As Figure 3 and Figure 4 shown, in the technical solution of this embodiment, a reinforcing rib 142 is provided on the first end portion 14, and the reinforcing rib 142 is located outside the through hole 141.

[0049] Specifically, an annular recess is provided on the surface of the first end portion 14 facing away from the second end portion 15. The inner side of the annular recess forms the hole wall of the through hole 141, and the outer side of the annular recess forms the outer wall of the first end portion 14. Such a setting can reduce the weight of the first end portion 14, thereby reducing the overall weight of the filtering device.

[0050] Furthermore, the above-mentioned reinforcing rib 142 is provided in the annular recess, and both ends of the reinforcing rib 142 are respectively connected to two opposite inner walls of the annular recess. Thereby, the structure of the hole wall of the through hole 141 is strengthened.

[0051] Furthermore, the above-mentioned reinforcing rib 142 is provided in multiple numbers, and the multiple reinforcing ribs 142 are arranged at intervals in a radial pattern along the circumference of the through hole 141. The specific number of the reinforcing ribs 142 can be determined by those skilled in the art according to actual needs.

[0052] Furthermore, from Figure 4 it can be seen that the outer surface of the second end portion 15 has a stepped structure, which includes a large-diameter section and a small-diameter section. The small-diameter section is located on the side of the large-diameter section facing away from the first end portion 14. The second end 132 of the above-mentioned cylindrical portion 13 is connected to the large-diameter section.

[0053] Furthermore, there are depressions on the surface of the small-diameter section, which can further reduce the weight of the second end portion 15, thereby reducing the overall weight of the filtering device.

[0054] As Figure 4 shown, in the technical solution of this embodiment, the threaded connection structure 30 is arranged on the outer side wall of the first end portion 14.

[0055] Specifically, the threaded connection structure 30 is an external thread arranged on the outer side wall of the first end portion 14, and an internal thread is arranged on the inner wall of the oil outlet of the oil pump. During assembly, the entire first end portion 14 is located inside the oil outlet, and through the cooperation of the external thread and the internal thread, the first end portion 14 is fixed inside the oil outlet of the oil pump, that is, the filtering device is fixed on the oil pump.

[0056] In this embodiment, by rotating the filtering device, the installation and disassembly of the filtering device on the oil pump can be achieved, making the overall installation and disassembly of the filtering device simple.

[0057] As Figure 4 shown, in the technical solution of this embodiment, a sealing structure 40 is arranged on the outer side wall of the first end portion 14, and the sealing structure 40 is used for sealing cooperation with the oil outlet of the oil pump.

[0058] Specifically, the sealing structure 40 is a sealing ring, the sealing ring is sleeved on the outer side wall of the first end portion 14, and the sealing ring is located on the side of the threaded connection structure 30 facing the second end portion 15. During assembly, the sealing ring is squeezed between the first end portion 14 and the oil outlet of the oil pump, thereby sealing the gap between the first end portion 14 and the oil outlet of the oil pump.

[0059] Furthermore, an annular groove is arranged on the outer side wall of the first end portion 14, the annular groove is located on the side of the threaded connection structure 30 facing the second end portion 15, and the sealing ring is arranged in the annular groove, thereby facilitating the positioning of the sealing ring.

[0060] As Figure 1 and Figure 2 shown, in the technical solution of this embodiment, the filtering structure 20 includes filter paper, the filter paper is in a cylindrical shape, the filter paper is arranged around the outside of the cylindrical portion 13, and both ends of the filter paper are respectively matched with the first end portion 14 and the second end portion 15.

[0061] Specifically, the filter paper is formed by folding non-woven fabric, its cross-section is approximately circular, and the overall is a cylindrical structure. The oil discharged from the oil passing port 111 is filtered by the filter paper and then discharged from the surface of the filter paper facing away from the cylindrical portion.

[0062] Optionally, the filter paper has wavy folds, thereby increasing the filtering area of the filter paper.

[0063] Of course, the filtering structure 20 can also be in other forms, for example, formed by bending a wire mesh structure made of metal, or made of other materials with filtering functions.

[0064] Further, one end of the filter paper is in interference fit with the first end portion 14, thereby preventing the oil from leaking through the gap between the filter paper and the first end portion 14. The other end of the filter paper is in interference fit with the second end portion 15, thereby preventing the oil from leaking through the gap between the filter paper and the second end portion 15.

[0065] As Figures 5 to 7 shown, the present application also provides an oil pump assembly. According to an embodiment of the oil pump assembly of the present application, it includes an oil pump body 50 and the above-mentioned filtering device. Wherein, the oil pump body 50 includes an oil outlet 51, and the filtering device is detachably connected to the oil outlet 51 through a threaded connection structure 30.

[0066] Specifically, the bracket 10 of the filtering device can be connected to the oil outlet 51 of the oil pump through the threaded connection structure 30, that is, before assembly, the oil pump body 50 and the filtering device are connected to form an assembled part. Since the filtering device is pre-connected to the oil pump body 50, foreign objects cannot enter the connection position between the oil pump body 50 and the filtering device during transportation, that is, the cleanliness inside the filtering device is ensured, and the cleanliness of the oil circulation oil path can also be ensured during subsequent assembly, preventing the oil pump from getting stuck.

[0067] Further, from Figure 7 it can be seen that the oil pump body 50 is generally in a cylindrical structure, and the oil outlet 51 is arranged at the central position of the end of the oil pump body 50. From Figure 7 it can also be seen that an annular boss is provided at the end of the oil pump body 50, the annular boss surrounds the outer side of the oil outlet 51, and an internal thread is provided on the inner surface of the annular boss.

[0068] From Figure 6 and Figure 7 it can be seen that when the oil pump body 50 and the filtering device are assembled, the first end portion 14 of the bracket 10 is integrally installed inside the annular boss, and by rotating the bracket 10, the threaded connection structure 30 (external thread) of the first end portion 14 is engaged with the internal thread of the annular boss, realizing the reliable connection between the oil pump body 50 and the filtering device. After assembly, the through hole 141 of the first end portion 14 is axially aligned with the oil outlet 51 of the oil pump body 50, and the oil can enter the oil injection cavity 111 through the through hole 141 after being discharged from the oil pump 50.

[0069] When it is necessary to disassemble the filtering device, just rotate the bracket 10 in the reverse direction.

[0070] The present application also provides a motor assembly. An embodiment of the motor assembly according to the present application includes a motor body and the above-mentioned oil pump assembly. The motor body includes a cavity and an installation opening communicating with the cavity. The oil pump assembly is installed at the installation opening, and the filtering device is located in the cavity.

[0071] Specifically, during assembly, the assembly formed by connecting the oil pump and the filtering device is directly assembled on the motor body, thereby preventing foreign objects from entering the connection position between the oil pump and the filtering device during transportation, that is, ensuring the cleanliness inside the filtering device, and also ensuring the cleanliness of the oil circuit for the oil circulation of the motor assembly during subsequent assembly processes, preventing the oil pump from getting stuck, and ensuring the normal operation of the motor assembly.

[0072] The present application also provides a vehicle. An embodiment of the vehicle according to the present application includes the above-mentioned motor assembly.

[0073] Optionally, the vehicle is a new energy electric vehicle.

[0074] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. A filtering device, characterized in that: include: A bracket (10), the bracket (10) having an oil injection chamber (11), the bracket (10) being provided with an oil inlet (12), the oil inlet (12) being in communication with the oil injection chamber (11), and the oil inlet (12) being used to be in communication with an oil outlet of an oil pump, the oil injection chamber (11) being provided with an oil outlet (111); A filtering structure (20) is arranged on the support (10) and surrounds the oil injection cavity (11). A threaded connection structure (30) is arranged on the bracket (10), and the threaded connection structure (30) is used for detachable connection with the oil pump.

2. The filtering device according to claim 1, characterized in that: The bracket (10) comprises a barrel (13) and a first end (14) and a second end (15) arranged at both ends of the barrel (13); the space inside the barrel (13) forms the oil injection cavity (11); the oil passage port (111) is arranged on the side wall of the barrel (13); and the filtering structure (20) is arranged around the outside of the barrel (13).

3. The filtering device according to claim 2, characterized in that: The first end portion (14) is provided with a through hole (141), the through hole (141) is communicated with the first end (131) of the barrel portion (13), the through hole (141) forms the oil inlet (12), the second end (132) of the barrel portion (13) is connected to the second end portion (15), and the second end portion (15) closes the second end (132) of the barrel portion (13).

4. The filtering device according to claim 3, characterized in that: A reinforcing rib (142) is provided on the first end portion (14), and the reinforcing rib (142) is located outside the through hole (141).

5. The filtering device according to claim 2, characterized in that: The threaded connection structure (30) is arranged on the outer side wall of the first end portion (14).

6. The filtering device according to claim 2, characterized in that: A sealing structure (40) is provided on the outer side wall of the first end portion (14), and the sealing structure (40) is used for sealingly cooperating with the oil outlet of the oil pump.

7. The filtering device according to any one of claims 2 to 6, characterized in that: The filtering structure (20) comprises filter paper, which is in a cylindrical shape and is arranged around the outside of the cylindrical portion (13), and the two ends of the filter paper are respectively matched with the first end portion (14) and the second end portion (15).

8. An oil pump assembly, characterized in that: It comprises an oil pump body (50) and a filter device as claimed in any one of claims 1 to 7, wherein the oil pump body (50) comprises an oil outlet (51), and the filter device is detachably connected to the oil outlet (51) via the threaded connection structure (30).

9. A motor assembly, characterized in that: It comprises a motor body and an oil pump assembly as claimed in claim 8, wherein the motor body comprises a cavity and a mounting port connected to the cavity, the oil pump assembly is mounted at the mounting port, and the filter device is located in the cavity.

10. A vehicle, characterized in that: Comprising the motor assembly as claimed in claim 9.

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