Filtering device, gearbox and vehicle

Abstract

The present disclosure provides a filtering device, a gearbox and a vehicle, and belongs to the technical field of automobile gearboxes. The filtering device comprises a shell, a filter element and a pump body. The shell has a cavity, a first through hole and a second through hole, and the first through hole and the second through hole are both in communication with the cavity. The filter element is arranged in the cavity, and comprises a first skeleton, a first filter element and a second filter element. The first skeleton has a first filter cavity, the first filter cavity is in communication with the first through hole, and the second filter cavity is formed between the first skeleton and the inner wall of the shell and is in communication with the second through hole. The first filter element is located in the first filter cavity and is connected with the first skeleton, and is used for filtering the liquid flowing through the first filter cavity. The second filter element is arranged in the second filter cavity and is used for filtering the liquid flowing through the second filter cavity. The pump body is located in the cavity and is connected with the inner wall of the shell, and has a first opening and a second opening. The first opening is in communication with the first filter cavity, and the second opening is in communication with the second filter cavity.

Description

Technical Field

[0001] This disclosure pertains to the field of automotive transmission technology, and particularly relates to a filtering device, transmission, and vehicle. Background Technology

[0002] In a vehicle's transmission, fluid lubricates and cools gears and bearings, and maintaining the cleanliness of the fluid is crucial for ensuring the transmission operates reliably.

[0003] To improve the filtration effect, two independent filtration devices can be installed in the gearbox. One filtration device is located upstream of the oil inlet of the pump body to perform the first filtration of the liquid drawn into the pump body, and the other filtration device is located downstream of the oil outlet of the pump body to perform the second filtration of the liquid discharged from the pump body.

[0004] However, two independent filter units usually need to be placed in two separate installation areas, which results in the filter units occupying more space in the transmission and increasing the complexity of the transmission's internal layout. Summary of the Invention

[0005] This disclosure provides a filtration device, a transmission, and a vehicle, which can solve the technical problems existing in related technologies. The technical solution is as follows: This disclosure provides a filtration device, which includes a housing, a filter element, and a pump body. The outer shell has a cavity, a first through hole and a second through hole, and both the first through hole and the second through hole are connected to the cavity; The filter element is disposed in the cavity. The filter element includes a first frame, a first filter element, and a second filter element. The first frame has a first filter cavity that communicates with the first through hole. A second filter cavity is formed between the first frame and the inner wall of the outer shell, and the second filter cavity communicates with the second through hole. The first filter element is located in the first filter cavity and connected to the first frame, and is used to filter the liquid flowing through the first filter cavity. The second filter element is disposed in the second filter cavity and is used to filter the liquid flowing through the second filter cavity. The pump body is located inside the cavity and connected to the inner wall of the outer shell. The pump body has a first opening and a second opening. The first opening communicates with the first filter cavity, and the second opening communicates with the second filter cavity.

[0006] In some possible implementations, the first through hole allows the liquid to flow in, and the second through hole allows the liquid to flow out; the first opening allows the liquid to enter the pump body from the first filter chamber, and the second opening allows the liquid to enter the second filter chamber from the pump body.

[0007] In some possible implementations, the second through-hole allows the liquid to flow in, and the first through-hole allows the liquid to flow out; the second opening allows the liquid to enter the pump body from the second filter chamber, and the first opening allows the liquid to enter the first filter chamber from the pump body.

[0008] In some possible implementations, both the first through hole and the second through hole are formed on the end face of the first end of the housing.

[0009] In some possible implementations, the first through hole is located at the middle position of the first end face.

[0010] In some possible implementations, the cavity extends through the second end of the housing along the central axis of the housing.

[0011] In some possible implementations, the housing has a first limiting surface located within the cavity and connected to the wall of the first through hole. The first limiting surface abuts against the first frame to limit the filter element in a first direction.

[0012] In some possible implementations, the housing has a second limiting surface located within the cavity and abutting against the first skeleton to limit the filter element in a second direction, which is perpendicular to the first direction.

[0013] This disclosure also provides a gearbox including the filtering device described above.

[0014] This disclosure also provides a vehicle including the gearbox as described above.

[0015] The technical solution provided in this disclosure includes at least the following beneficial effects: The filtration device disclosed herein has a filter element forming a first filter chamber, and the filter element is installed in the cavity of the housing to form a second filter chamber with the inner wall of the housing. The first filter element in the first filter chamber and the second filter element in the second filter chamber can filter the liquid twice. While ensuring that the liquid is filtered twice, the space occupied by the filtration device can be reduced. When applied to a gearbox, it can reduce the complexity of the internal layout of the gearbox.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. In the drawings: Figure 1 This is an exploded view of a filtering device provided in an embodiment of this disclosure; Figure 2 This is a cross-sectional view of a housing provided in an embodiment of this disclosure; Figure 3 This is a cross-sectional view of a filtration device provided in this disclosure, wherein liquid flows in through a first through-hole and liquid flows out through a second through-hole; Figure 4 This is a cross-sectional view of a filtration device provided in this embodiment, wherein liquid flows in through a second through-hole and liquid flows out through a first through-hole; Figure 5 This is a cross-sectional view of a filter element provided in an embodiment of this disclosure.

[0018] Legend 1. Filtration device; 10. Outer shell; 100. Cavity; 101. First through hole; 102. Second through hole; 103. First end; 104. Second end; 105. First limiting surface; 106. Second limiting surface; 107. Second transition groove; 11. Filter element; 110. First frame; 1101. First filter chamber; 1102. Second filter chamber; 1102a. Outer ring cavity; 1102b. Inner ring cavity; 1103. First cylindrical part; 1104. First limiting part; 1104a. First transition groove; 111. First filter element; 112. Second filter element; 113. Second frame; 1131. Seat part; 1131a. Transition cavity; 1131b. Third limiting surface; 1132. Second cylindrical part; 1132a. Third through hole; 12. Pump body; 121. First opening; 122. Second opening; 123. Second limiting part; 1231. Limiting cavity; 131. First seal; 132. Second seal; 133. Third seal; 134. Fourth seal.

[0019] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings.

[0021] The terminology used in the embodiments of this disclosure is for illustrative purposes only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used herein should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising,” “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0022] This disclosure provides a filtering device 1, with reference to... Figure 1 The filter device 1 includes a housing 10, a filter element 11, and a pump body 12. (Reference) Figure 2 The outer casing 10 has a cavity 100, a first through hole 101, and a second through hole 102, both of which communicate with the cavity 100. (Reference) Figure 3 A filter element 11 is disposed within a cavity 100. The filter element 11 includes a first frame 110, a first filter element 111, and a second filter element 112. The first frame 110 has a first filter cavity 1101, which communicates with a first through hole 101. A second filter cavity 1102 is formed between the first frame 110 and the inner wall of the outer shell 10, and communicates with a second through hole 102. The first filter element 111 is located within the first filter cavity 1101 and connected to the first frame 110, and is used to filter the liquid flowing through the first filter cavity 1101. The second filter element 112 is disposed within the second filter cavity 1102 and is used to filter the liquid flowing through the second filter cavity 1102. The pump body 12 is located inside the cavity 100 and connected to the inner wall of the outer shell 10. The pump body 12 has a first opening 121 and a second opening 122. The first opening 121 is connected to the first filter chamber 1101, and the second opening 122 is connected to the second filter chamber 1102.

[0023] The inner wall of the outer shell 10 forms a cavity 100.

[0024] Using the technical solution provided in this embodiment, the filter element 11 itself forms a first filter chamber 1101. At the same time, the filter element 11 is installed in the cavity 100 of the outer shell 10 and forms a second filter chamber 1102 between it and the inner wall of the outer shell 10. The first filter element 111 in the first filter chamber 1101 and the second filter element 112 in the second filter chamber 1102 can filter the liquid twice. That is, only one installation area of ​​the filter device 1 needs to be planned to filter the liquid twice, thereby reducing the space occupied by the filter device 1 while ensuring that the liquid is filtered twice.

[0025] It is understood that the liquid can be oil or other types of liquid, and is not limited herein. For example, the filter device 1 provided in this embodiment can be applied to the transmission of a vehicle. The first filter element 111 in the first filter chamber 1101 and the second filter element 112 in the second filter chamber 1102 can filter the oil twice. Only one installation area for the filter device 1 needs to be planned in the transmission of the vehicle to filter the oil twice, thereby reducing the space occupied by the filter device 1 in the transmission and reducing the complexity of the layout in the transmission.

[0026] In some possible implementations, refer to Figure 3 ( Figure 3 (The dashed lines with arrows indicate the direction of liquid flow). The first through hole 101 allows liquid to flow in, and the second through hole 102 allows liquid to flow out. The first opening 121 allows liquid to enter the pump body 12 from the first filter chamber 1101, and the second opening 122 allows liquid to enter the second filter chamber 1102 from the pump body 12.

[0027] Specifically, under the suction action of the pump body 12, liquid can be drawn into the first filter chamber 1101 through the first through hole 101. During its flow within the first filter chamber 1101, the liquid passes through the first filter element 111, which performs the first filtration. The liquid after the first filtration is then drawn into the pump body 12 through the first opening 121. The pump body 12 then delivers the first-filtered liquid to the second filter chamber 1102 through the second opening 122. During its flow within the second filter chamber 1102, the first-filtered liquid passes through the second filter element 112, which performs the second filtration. The second-filtered liquid then flows out of the filter device 1 through the second through hole 102, thus achieving two filtrations of the liquid as it flows through the filter device 1.

[0028] The mesh area of ​​the first filter element 111 can be larger than that of the second filter element 112. Specifically, the first filter element 111 can perform coarse filtration during the first filtration of the liquid, meaning it can filter out large particulate impurities in the liquid to prevent them from flowing through the pump body 12 and causing damage, thus protecting the pump body 12. The second filter element 112 can perform fine filtration during the second filtration of the liquid, meaning it can filter out small particulate impurities in the liquid to ensure that the liquid after the second filtration meets quality requirements.

[0029] In some possible implementations, refer to Figure 4 ( Figure 4 (The dashed lines with arrows indicate the direction of liquid flow). The second through hole 102 allows liquid to flow in, and the first through hole 101 allows liquid to flow out. The second opening 122 allows liquid to enter the pump body 12 through the second filter chamber 1102, and the first opening 121 allows liquid to enter the first filter chamber 1101 through the pump body 12.

[0030] Specifically, under the suction action of the pump body 12, liquid can be drawn into the second filter chamber 1102 through the second through hole 102. During its flow within the second filter chamber 1102, the liquid passes through the second filter element 112, which performs a first filtration. The liquid after the first filtration is then drawn into the pump body 12 through the second opening 122. The pump body 12 then delivers the first-filtered liquid to the first filter chamber 1101 through the first opening 121. During its flow within the first filter chamber 1101, the liquid passes through the first filter element 111, which performs a second filtration. The second-filtered liquid then flows out of the filter device 1 through the first through hole 101, thus achieving two filtrations of the liquid as it flows through the filter device 1.

[0031] The mesh area of ​​the second filter element 112 can be larger than that of the first filter element 111. Specifically, the second filter element 112 can perform coarse filtration during the first filtration of the liquid, meaning it can filter out large particulate impurities in the liquid to prevent them from flowing through the pump body 12 and causing damage, thus protecting the pump body 12. The first filter element 111 can perform fine filtration during the second filtration of the liquid, meaning it can filter out small particulate impurities in the liquid to ensure that the liquid after both filtrations meets quality requirements.

[0032] In some possible implementations, the outer casing 10 may be a cylindrical structure.

[0033] Of course, the outer shell 10 can also be other shapes or structures such as a square tube, which are not limited here.

[0034] It is understandable that the cavity 100 can also be roughly cylindrical in shape to match the shape of the outer shell 10. Of course, the cavity 100 can also be other shapes such as a square tube, which is not limited here.

[0035] In some possible implementations, refer to Figure 2 Both the first through hole 101 and the second through hole 102 are opened on the end face of the first end 103 of the outer casing 10.

[0036] Both the first through hole 101 and the second through hole 102 are opened on the end face of the first end 103 of the housing 10, so that liquid can flow into and out of the filter device 1 from the end face of the first end 103 of the housing 10, which can make the structure more compact.

[0037] Of course, the first through hole 101 and the second through hole 102 may be provided on the end face of the first end 103 of the outer casing 10, and the other may be provided on the side of the outer casing 10, or both may be provided on the side of the outer casing 10, etc., which is not limited here.

[0038] In some possible implementations, the first through hole 101 is located at the middle position of the end face of the first end 103.

[0039] The central axis of the first through hole 101 can be approximately coincident with the central axis of the outer casing 10, so that the first through hole 101 is opened at the middle position of the end face of the first end 103.

[0040] It is understandable that the second through hole 102 is located on the end face of the first end 103 between the first through hole 101 and the edge of the end face.

[0041] In some possible implementations, refer to Figure 2 The cavity 100 passes through the second end 104 of the outer shell 10 along the central axis of the outer shell 10.

[0042] The cavity 100 extends through the second end 104 of the outer shell 10, allowing for easy installation and removal of the filter element 11 and the pump body 12 from the second end 104 of the outer shell 10.

[0043] Specifically, when installing the filter device 1, the filter element 11 is first inserted into the cavity 100 from the second end 104 of the outer casing 10. When the filter element 11 abuts against the first end 103, the first filter cavity 1101 communicates with the first through hole 101. Then, the pump body 12 is inserted into the cavity 100 from the second end 104 of the outer casing 10. When the pump body 12 abuts against the filter element 11, the first opening 121 of the pump body 12 communicates with the first filter cavity 1101 of the filter element 11. The pump body 12 is closer to the second end 104 of the outer casing 10 than the filter element 11. When disassembling the filter device 1, the pump body 12 is first removed from the cavity 100 from the second end 104 of the outer casing 10, and then the filter element 11 is removed from the cavity 100 from the second end 104 of the outer casing 10.

[0044] In some possible implementations, the pump body 12 may be snapped into the inner wall of the housing 10.

[0045] The side wall of the pump body 12 can be engaged with the inner wall of the housing 10, allowing the pump body 12 to move along the central axis of the housing 10, while limiting the pump body 12 in the radial direction of the housing 10.

[0046] In some possible implementations, refer to Figure 3 The pump body 12 and the inner wall of the outer casing 10 can be sealed by the first sealing element 131.

[0047] The pump body 12 is sealed to the inner wall of the housing 10 by a first seal 131, which can limit liquid leakage. In addition, the first seal 131 can enhance the stability of the engagement between the pump body 12 and the inner wall of the housing 10, and limit the movement of the pump body 12 in the central axis of the housing 10.

[0048] The first sealing element 131 can be a rubber sealing ring or other types of sealing elements, which are not limited here.

[0049] In some possible implementations, refer to Figure 2 The outer casing 10 has a first limiting surface 105, which is located inside the cavity 100 and connected to the wall of the first through hole 101, for reference. Figure 3 The first limiting surface 105 abuts against the first frame 110 and is used to limit the filter element 11 in the first direction.

[0050] Based on the cylindrical structure of the outer shell 10, the first direction can be the axial direction of the outer shell 10.

[0051] When installing the filter device 1, the filter element 11 is inserted into the cavity 100 from the second end 104 of the outer shell 10. When the first frame 110 of the filter element 11 abuts against the first limiting surface 105, the first limiting surface 105 limits the filter element 11 in the axial direction of the outer shell 10. After the filter element 11 is limited in the axial direction of the outer shell 10, the pump body 12 is inserted into the cavity 100 from the second end 104 of the outer shell 10. When the pump body 12 abuts against the first frame 110, the pump body 12 is limited in the axial direction of the outer shell 10.

[0052] The first limiting surface 105 may be perpendicular to the central axis of the outer shell 10 or inclined relative to the central axis of the outer shell 10, which is not limited here.

[0053] In some possible implementations, refer to Figure 2 and Figure 3The outer shell 10 has a second limiting surface 106, which is located inside the cavity 100 and abuts against the first frame 110. It is used to limit the filter element 11 in a second direction, which is perpendicular to the first direction.

[0054] Based on the cylindrical structure of the outer shell 10, the second direction can be the radial direction of the outer shell 10.

[0055] When installing the filter device 1, the filter element 11 is inserted into the cavity 100 from the second end 104 of the outer shell 10. Before the first frame 110 of the filter element 11 abuts against the first limiting surface 105, the first frame 110 can first abut against the second limiting surface 106 to limit the filter element 11 in the radial direction of the outer shell 10. Then the first frame 110 abuts against the first limiting surface 105 to limit the filter element 11 in the axial direction of the outer shell 10.

[0056] The second limiting surface 106 may be parallel to the central axis of the outer shell 10, or it may be inclined relative to the central axis of the outer shell 10 (that is, intersecting with the central axis of the outer shell 10), which is not limited here.

[0057] In some possible implementations, refer to Figure 3 The first frame 110 and the second limiting surface 106 can be sealed by the second sealing element 132.

[0058] The first frame 110 of the filter element 11 is sealed to the second limiting surface 106 by the second seal 132, which can limit liquid leakage. In addition, the second seal 132 can enhance the stability of the contact between the filter element 11 and the housing 10, and limit the movement of the filter element 11 in the central axis of the housing 10.

[0059] The second seal 132 can be a rubber sealing ring or other types of seals, which are not limited here.

[0060] In some possible implementations, refer to Figure 5 The first frame 110 includes a first cylindrical portion 1103 and a first limiting portion 1104. The inner wall of the first cylindrical portion 1103 can form a first filter cavity 1101, which extends through both ends of the first cylindrical portion 1103. (Refer to...) Figure 3 The outer wall of the first cylindrical portion 1103 can form a second filter cavity 1102 between it and the inner wall of the outer shell 10. The first limiting portion 1104 is connected to the outer wall of the first cylindrical portion 1103 and is disposed around the first cylindrical portion 1103, and the first limiting portion 1104 is used to abut against the first limiting surface 105 and the second limiting surface 106.

[0061] The first cylindrical portion 1103 can be a cylindrical structure to match the shape of the cavity 100. Of course, the first cylindrical portion 1103 can also be other shapes such as a square cylinder, which is not limited here.

[0062] The first limiting part 1104 may be adjacent to one end of the first cylindrical part 1103. (See reference) Figure 3 The side of the first limiting part 1104 can abut against the second limiting surface 106 to limit the first frame 110 in the radial direction of the outer shell 10, and the end face of the first limiting part 1104 can abut against the first limiting surface 105 to limit the first frame 110 in the axial direction of the outer shell 10.

[0063] refer to Figure 3 When the first frame 110 is limited in both the radial and axial directions of the outer shell 10, one end of the first cylindrical part 1103 can be inserted into the first through hole 101 so that the first filter chamber 1101 communicates with the first through hole 101. At the same time, the part of the first cylindrical part 1103 inserted into the first through hole 101 can abut against the hole wall of the first through hole 101, and the part of the first cylindrical part 1103 inserted into the first through hole 101 and the hole wall of the first through hole 101 can be sealed by the third sealing member 133 to limit liquid overflow.

[0064] The third sealing element 133 can be a rubber sealing ring or other types of sealing elements, which are not limited here.

[0065] When the first frame 110 is limited in both the radial and axial directions of the outer shell 10, the central axis of the first cylindrical part 1103 can be approximately coincident with the central axis of the first through hole 101. When the shape of the first cylindrical part 1103 is approximately matched with the shape of the cavity 100, the second filter cavity 1102 formed between the outer wall of the first cylindrical part 1103 and the inner wall of the outer shell 10 can surround the first cylindrical part 1103.

[0066] In some possible implementations, the first filter element 111 is connected to the inner wall of the first cylindrical portion 1103. (See reference...) Figure 3 The second filter element 112 can be arranged around the first cylindrical part 1103, and a gap is formed between the second filter element 112 and the outer wall of the first cylindrical part 1103 and between the second filter element 112 and the inner wall of the outer shell 10, thus dividing the second filter cavity 1102 into an outer ring cavity 1102a and an inner ring cavity 1102b. The outer ring cavity 1102a is connected to the second opening 122, and the inner ring cavity 1102b is connected to the second through hole 102.

[0067] The projection of the first filter element 111 in the axial direction of the first cylindrical portion 1103 can completely cover the first filter cavity 1101, so as to fully filter the liquid flowing from one end of the first filter cavity 1101 to the other end.

[0068] The second filter element 112 forms an outer annular cavity 1102a between itself and the inner wall of the outer shell 10, and the second filter element 112 forms an inner annular cavity 1102b between itself and the outer wall of the first cylindrical part 1103, thereby forming a structure in which the outer annular cavity 1102a surrounds the inner annular cavity 1102b and the inner annular cavity 1102b surrounds the first cylindrical part 1103.

[0069] In some possible examples, refer to Figure 3 Under the suction action of the pump body 12, the liquid can be drawn into the first filter chamber 1101 through the first through hole 101. During the flow of the liquid in the first filter chamber 1101, it flows through the first filter element 111, which performs the first filtration. The liquid after the first filtration is drawn into the interior of the pump body 12 through the first opening 121. The pump body 12 then sends the liquid after the first filtration to the outer ring chamber 1102a through the second opening 122. The liquid after the first filtration flows from the outer ring chamber 1102a to the inner ring chamber 1102b, where it is filtered a second time by the second filter element 112. The liquid after the second filtration flows from the inner ring chamber 1102b to the second through hole 102 and out of the filter device 1, thus achieving two filtrations of the liquid as it flows through the filter device 1.

[0070] In some possible examples, refer to Figure 4 Under the suction of the pump body 12, the liquid can be drawn into the inner annular cavity 1102b through the second through hole 102. The liquid flows from the inner annular cavity 1102b to the outer annular cavity 1102a, and during the flow, the liquid is first filtered by the second filter element 112. The liquid filtered in the first step is drawn into the interior of the pump body 12 through the second opening 122, and the pump body 12 sends the liquid after the first step to the first filter cavity 1101 through the first opening 121. During the flow of the liquid after the first step in the first filter cavity 1101, the liquid is second filtered by the first filter element 111. The liquid after the second step flows out of the filter device 1 through the first through hole 101, thus realizing that the liquid undergoes two filtrations when flowing through the filter device 1.

[0071] In some possible implementations, refer to Figure 5 The first limiting part 1104 may have a first transition groove 1104a, see reference. Figure 3 One end of the first transition groove 1104a can be connected to the inner ring cavity 1102b, and the other end of the first transition groove 1104a can be connected to the second through hole 102.

[0072] By providing the first transition groove 1104a, liquid can flow conveniently between the inner annular cavity 1102b and the second through hole 102. For example, when liquid flows into the first through hole 101 and out of the second through hole 102, the liquid flows from the inner annular cavity 1102b through the first transition groove 1104a to the second through hole 102; when liquid flows into the second through hole 102 and out of the first through hole 101, the liquid flows from the second through hole 102 through the first transition groove 1104a to the inner annular cavity 1102b.

[0073] In some possible examples, the first transition groove 1104a may be provided around the first cylindrical portion 1103.

[0074] In some possible implementations, refer to Figure 2 A second transition groove 107 can be formed at the first end 103 of the outer casing 10, as shown in the reference. Figure 3 The second transition groove 107 is arranged around the first through hole 101, and the second transition groove 107 is connected to the first transition groove 1104a and the second through hole 102.

[0075] refer to Figure 3 When liquid flows into the first through-hole 101 and out of the second through-hole 102, the liquid flows in the direction of the inner annular cavity 1102b, the first transition groove 1104a, the second transition groove 107, and the second through-hole 102; (Reference) Figure 4 When liquid flows in through the second through hole 102 and liquid flows out through the first through hole 101, the liquid flows in the direction of the second through hole 102, the second filter tank, the first transition tank 1104a, and the inner ring cavity 1102b.

[0076] In some possible implementations, refer to Figure 3 and Figure 5 The filter element 11 may also include a second frame 113, which includes a seat portion 1131 and a second cylindrical portion 1132. The seat portion 1131 is connected to the end of the first cylindrical portion 1103 away from the first limiting portion 1104, and the seat portion 1131 has a transition cavity 1131a that extends through both ends of the seat portion 1131 to connect the first filter cavity 1101 and the first opening 121. The second cylindrical part 1132 is connected to the base part 1131. The second cylindrical part 1132 is arranged around the first cylindrical part 1103, and a gap is formed between the inner wall of the second cylindrical part 1132 and the outer wall of the first cylindrical part 1103, and between the outer wall of the second cylindrical part 1132 and the inner wall of the outer shell 10. The second cylindrical part 1132 is used to connect the second filter element 112, and the second cylindrical part 1132 is provided with a plurality of third through holes 1132a, which allow liquid to flow between the outer ring cavity 1102a and the inner ring cavity 1102b.

[0077] The end of the second cylindrical part 1132 that is away from the seat part 1131 can be engaged with the limiting part.

[0078] In some possible examples, refer to Figure 3 Under the suction action of the pump body 12, the liquid can be drawn into the first filter chamber 1101 through the first through hole 101. During the flow of the liquid in the first filter chamber 1101, it flows through the first filter element 111, which performs the first filtration. The liquid after the first filtration is drawn into the interior of the pump body 12 through the first opening 121. The pump body 12 then sends the liquid after the first filtration to the outer ring chamber 1102a through the second opening 122. The liquid after the first filtration flows from the outer ring chamber 1102a through the third through hole 1132a into the inner ring chamber 1102b. During the flow, the liquid after the first filtration is filtered a second time by the second filter element 112. The liquid after the second filtration flows from the inner ring chamber 1102b to the second through hole 102 and then out of the filter device 1, thus achieving two filtrations of the liquid as it flows through the filter device 1.

[0079] In some possible examples, refer to Figure 4 Under the suction of the pump body 12, the liquid can be drawn into the inner annular cavity 1102b through the second through hole 102. The liquid flows from the inner annular cavity 1102b to the outer annular cavity 1102a through the third through hole 1132a, and is filtered for the first time by the second filter element 112 during the flow. The liquid filtered for the first time is drawn into the interior of the pump body 12 through the second opening 122, and the pump body 12 sends the liquid filtered for the first time to the first filter cavity 1101 through the first opening 121. During the flow of the liquid filtered for the first time in the first filter cavity 1101, it is filtered for the second time by the first filter element 111. The liquid filtered for the second time flows out of the filter device 1 through the first through hole 101, thus realizing that the liquid is filtered twice when flowing through the filter device 1.

[0080] In some possible implementations, the second filter element 112 may be disposed around the second cylindrical portion 1132 and fitted to the second cylindrical portion 1132; in other words, the second filter element 112 may cover the outer wall of the second cylindrical portion 1132. Alternatively, the second cylindrical portion 1132 may also be disposed around the second filter element 112 and fitted to the second cylindrical portion 1132; in other words, the second filter element 112 may cover the inner wall of the second cylindrical portion 1132.

[0081] The second cylindrical part 1132 can provide a certain support for the second filter element 112, preventing the second filter element 112 from being deformed and damaged under the impact of liquid flow, and extending the service life of the second filter element 112.

[0082] The second filter element 112 can be detachably connected to the second cylindrical part 1132, so that the second filter element 112 can be directly replaced when it needs to be replaced.

[0083] In some possible implementations, refer to Figure 5 The base portion 1131 and the first cylindrical portion 1103 can be connected by threads.

[0084] Specifically, the inner wall of the seat portion 1131 forming the transition cavity 1131a can be provided with internal threads, and the end of the first cylindrical portion 1103 can be provided with external threads. The end of the first cylindrical portion 1103 extends into the transition cavity 1131a and is connected to the seat portion 1131 by threads, enabling a detachable connection between the first frame 110 and the second frame 113. If the second filter element 112 and the second cylindrical portion 1132 are connected in a non-detachable manner, when the second filter element 112 needs to be replaced, the second frame 113 with the new second filter element 112 can be directly replaced. If the second filter element 112 covers the inner wall of the second cylindrical portion 1132, when the second filter element 112 needs to be replaced, the second frame 113 can be separated from the first frame 110 first, increasing the space in the middle of the second frame 113 to facilitate the installation and removal of the second filter element 112.

[0085] In some possible implementations, refer to Figure 1 The pump body 12 is connected to a second limiting part 123, the second limiting part 123 having a limiting cavity 1231, and the first opening 121 communicating with the limiting cavity 1231. (Reference) Figure 3 and Figure 5 At least one end of the seat portion 1131 is embedded in the limiting cavity 1231, and the transition cavity 1131a is connected to the limiting cavity 1231. The seat portion 1131 has a third limiting surface 1131b, which abuts against the end face of the second limiting portion 123.

[0086] The third limiting surface 1131b abuts against the end face of the second limiting part 123, thereby defining the relative position between the filter element 11 and the pump body 12 in the axial direction of the housing 10.

[0087] refer to Figure 3 The portion of the seat 1131 embedded in the limiting cavity 1231 is sealed to the cavity wall of the limiting cavity 1231 by a fourth seal 134, which can limit liquid leakage. In addition, the seat 1131 embedded in the limiting cavity 1231 can define the relative position between the filter element 11 and the pump body 12 in the radial direction of the housing 10.

[0088] The fourth sealing element 134 can be a rubber sealing ring or other types of sealing elements, which are not limited here.

[0089] This disclosure also provides a gearbox including the filter device 1 as described above.

[0090] This disclosure also provides a vehicle including the gearbox as described above.

[0091] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A filtration device (1), characterized in that, The filtration device (1) includes a housing (10), a filter element (11), and a pump body (12). The outer shell (10) has a cavity (100), a first through hole (101) and a second through hole (102), and the first through hole (101) and the second through hole (102) are both connected to the cavity (100); The filter element (11) is disposed in the cavity (100). The filter element (11) includes a first frame (110), a first filter element (111), and a second filter element (112). The first frame (110) has a first filter cavity (1101) which communicates with the first through hole (101). A second filter cavity (1102) is formed between the first frame (110) and the inner wall of the outer shell (10). The second filter cavity (1102) communicates with the second through hole (102). The first filter element (111) is located in the first filter cavity (1101) and connected to the first frame (110), and is used to filter the liquid flowing through the first filter cavity (1101). The second filter element (112) is disposed in the second filter cavity (1102) and is used to filter the liquid flowing through the second filter cavity (1102). The pump body (12) is located inside the cavity (100) and connected to the inner wall of the outer shell (10). The pump body (12) has a first opening (121) and a second opening (122). The first opening (121) communicates with the first filter chamber (1101), and the second opening (122) communicates with the second filter chamber (1102).

2. The filtration device (1) according to claim 1, characterized in that, The first through hole (101) allows the liquid to flow in, and the second through hole (102) allows the liquid to flow out; the first opening (121) allows the liquid to enter the pump body (12) from the first filter chamber (1101), and the second opening (122) allows the liquid to enter the second filter chamber (1102) from the pump body (12).

3. The filtration device (1) according to claim 1, characterized in that, The second through hole (102) allows the liquid to flow in, and the first through hole (101) allows the liquid to flow out; the second opening (122) allows the liquid to enter the pump body (12) from the second filter chamber (1102), and the first opening (121) allows the liquid to enter the first filter chamber (1101) from the pump body (12).

4. The filtration device (1) according to claim 1, characterized in that, The first through hole (101) and the second through hole (102) are both opened on the end face of the first end (103) of the outer shell (10).

5. The filtration device (1) according to claim 4, characterized in that, The first through hole (101) is located at the middle position of the end face of the first end (103).

6. The filtration device (1) according to claim 4, characterized in that, The cavity (100) extends through the second end (104) of the outer shell (10) along the central axis of the outer shell (10).

7. The filtration device (1) according to claim 1, characterized in that, The outer shell (10) has a first limiting surface (105), which is located inside the cavity (100) and connected to the wall of the first through hole (101). The first limiting surface (105) abuts against the first skeleton (110) and is used to limit the filter element (11) in a first direction.

8. The filtration device (1) according to claim 7, characterized in that, The outer shell (10) has a second limiting surface (106) located inside the cavity (100) and abuts against the first skeleton (110) for limiting the filter element (11) in a second direction, which is perpendicular to the first direction.

9. A gearbox, characterized in that, Includes the filtration device (1) as described in any one of claims 1-8.

10. A vehicle, characterized in that, Including the gearbox as described in claim 9.

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