An oil suction filter

Abstract

This utility model provides an oil suction filter, including a housing and a filter assembly disposed within the housing. The housing includes a bottom shell and a cover plate, the cover plate being a light-transmitting element and the bottom shell being a light-absorbing element. The filter assembly includes a filter screen frame and a filter screen disposed within the filter screen frame. The edges of the bottom shell and the cover plate are laser-welded together to form a sealed connection along the edges, and the edges of the filter screen frame and the cover plate are laser-welded together to form a sealed connection along the edges. In this utility model, the laser-welded structure and double seals achieve good positioning and support, ensuring a tight fit between the cover plate, frame, and housing, effectively preventing dust and impurities from entering the filter interior.

Description

Technical Field

[0001] This utility model belongs to the field of filter technology, and specifically relates to an oil suction filter. Background Technology

[0002] Current oil suction filters on the market are manufactured using ultrasonic welding, adhesive sealing, mechanical pressing, and conventional laser welding. Under high temperatures, the plastic filter housing is prone to deformation, leading to micropore blockage of the filter element (especially for heat-sensitive materials like PA66). Adhesives used in bonding may dissolve and fail if in prolonged contact with oily media. Mechanically pressed structures are prone to micro-gaps under oil pressure pulses (especially pressures reaching 1.6 MPa), resulting in leakage. When the weld porosity is >5%, the IP67 sealing standard is difficult to achieve (a leakage rate of <1×10⁻⁻⁻⁶ is required). 9 [Pa·m³ / s] Conventional laser welding involves welding the bottom shell, cover plate, and filter screen frame separately, with a lack of support between the filter screen frame and the bottom shell. This can easily lead to problems such as incomplete welds, weak welds, and unstable sealing strength.

[0003] It is evident that the current oil suction filter structures all suffer from instability and unreliability. Utility Model Content

[0004] The purpose of this utility model is to provide an oil suction filter that uses laser welding to form two seals to improve product reliability and extend service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an oil suction filter, comprising a housing and a filter assembly disposed within the housing, the housing comprising a bottom shell and a cover plate, the cover plate being a light-transmitting element and the bottom shell being a light-absorbing element; the filter assembly comprising a filter screen frame and a filter screen disposed within the filter screen frame;

[0006] The edges of the bottom shell and the cover plate are laser-welded to form a sealed and fixed connection along the edges. The edge of the filter mesh skeleton is fixed between the edges of the bottom shell and the cover plate and is laser-welded to the edge of the cover plate to form a sealed and fixed connection along the edges.

[0007] Furthermore, the bottom shell has a first horizontal portion along the edge and a first vertical portion on the first horizontal portion; the cover plate has a second horizontal portion along the edge and a second vertical portion on the second horizontal portion; the first vertical portion is laser welded to the second horizontal portion, and the second vertical portion is located outside the first vertical portion.

[0008] Furthermore, the filter frame has a third horizontal portion along the edge and a third vertical portion disposed on the third horizontal portion; the third horizontal portion is located between the first horizontal portion and the second horizontal portion, the third vertical portion is laser-welded to the second horizontal portion, and the third vertical portion is located inside the first vertical portion.

[0009] Furthermore, the first horizontal portion is also provided with a fourth vertical portion, which is located inside the first vertical portion and abuts against the third horizontal portion.

[0010] Furthermore, the cover plate is provided with an inlet, and the bottom shell is provided with an outlet.

[0011] Furthermore, the outlet is located at one end of the side of the bottom shell, and the bottom shell is provided with guide ribs that also serve a supporting function.

[0012] Furthermore, the end of the bottom shell is also provided with a bolt fixing part with a bushing.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, the bottom shell edge supports the edge of the filter frame, and the two seals formed by laser welding achieve good positioning support, ensuring that the cover plate, frame and shell fit tightly together, effectively preventing dust and impurities from entering the filter element.

[0015] 2. In this utility model, the welded structure is realized through existing injection molding and machining technologies, without the need for complex processes, making it easy to mass-produce and applicable to all suction filter structures, thus having higher application value. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural view of a preferred embodiment of the present invention;

[0017] Figure 2 for Figure 1 Top view of the structure of the embodiment shown;

[0018] Figure 3 for Figure 2 Structural sectional view along the AA direction;

[0019] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0020] Figure 5 for Figure 1 A three-dimensional view of the bottom shell structure in the embodiment shown.

[0021] Figure label:

[0022] 1. Housing; 2. Filter assembly; 3. Bottom shell; 4. Cover plate; 5. Filter screen frame; 6. Filter screen; 7. First horizontal section; 8. First vertical section; 9. Second horizontal section; 10. Second vertical section; 11. Third horizontal section; 12. Third vertical section; 13. Fourth vertical section; 14. Inlet; 15. Outlet; 16. Guide rib; 17. Bolt fixing part. Detailed Implementation

[0023] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figures 1 to 5 As shown, this utility model discloses an oil suction filter, including a housing 1 and a filter assembly 2 disposed within the housing 1. The housing 1 is a rectangular structure. As an improvement, the housing 1 is made of plastic and includes a bottom shell 3 and a cover plate 4. The cover plate 4 is a light-transmitting component, and the bottom shell 3 is a light-absorbing component. An inlet 14 is provided on the cover plate 4, and an outlet 15 is provided on the bottom shell 3.

[0025] The filter assembly 2 includes a filter frame 5 and a filter screen 6 disposed in the filter frame 5. The filter frame 5 is also made of plastic, and the filter screen 6 is fixed in the filter frame 5 by injection molding.

[0026] The edges of the bottom shell 3 and the cover plate 4 are laser-welded together to form a sealed connection along the edges. The edges of the filter mesh frame 5 and the cover plate 4 are also laser-welded together to form a sealed connection along the edges. By forming two sealed connections through two laser welding processes, not only is a sealed connection between the filter mesh frame 5 and the shell 1 achieved, but the connection also has high strength, can withstand high-temperature environments, and is not easily damaged or failed.

[0027] As a preferred embodiment, the bottom shell 3 has a first horizontal portion 7 running along its edge and a first vertical portion 8 disposed on the first horizontal portion 7. The cover plate 4 has a second horizontal portion 9 running along its edge and a second vertical portion 10 disposed on the second horizontal portion 9. When the bottom shell 3 and the cover plate 4 are connected, the second vertical portion 10 is located outside the first vertical portion 8, thereby enclosing the first vertical portion 8, while the first vertical portion 8 abuts against the second horizontal portion 9, thus achieving positioning between the bottom shell 3 and the cover plate 4. The first vertical portion 8 and the second horizontal portion 9 are laser welded to achieve a sealed connection between the two components.

[0028] In a preferred embodiment, the filter frame 5 has a third horizontal portion 11 running around its edge and a third vertical portion 12 disposed on the third horizontal portion 11. The third horizontal portion 11 is located between the first horizontal portion 7 and the second horizontal portion 9, that is, the third horizontal portion 11 is fixed between the edges of the bottom shell 3 and the cover plate 4, and the third vertical portion 12 is located inside the first vertical portion 8, thereby positioning the filter frame 5 on the bottom shell 3. The third vertical portion 12 abuts against the second horizontal portion 9, and the two components are sealed together by laser welding.

[0029] As a preferred embodiment, the first horizontal portion 7 is further provided with a fourth vertical portion 13, which is located inside the first vertical portion 8 and abuts against the third horizontal portion 11. The abutment between the fourth vertical portion 13 and the third horizontal portion 11 provides support for the third horizontal portion 11, which helps to establish a contact force between the third vertical portion 12 and the second horizontal portion 9 after welding, thereby improving the connection strength.

[0030] As a preferred embodiment, the outlet 15 is located at one side end of the bottom shell 3, and the bottom shell 3 is provided with a guide rib 16 that also serves as a support. The guide rib 16 can guide the filtered oily medium to flow towards the outlet 15. At the same time, the guide rib 16 can also provide some support for the filter screen 6, preventing it from detaching from the filter screen frame 5 due to the impact of the oily medium.

[0031] As a preferred embodiment, the end of the bottom shell 3 is further provided with a bushinged bolt fixing part 17. The bolt fixing part 17 is located at the other end opposite the end where the outlet 15 is located, thereby facilitating installation on the corresponding opposite part by bolt.

[0032] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0033] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An oil suction filter, comprising a housing (1) and a filter assembly (2) disposed within the housing (1), characterized in that: The housing (1) includes a bottom shell (3) and a cover plate (4), the cover plate (4) being a light-transmitting element and the bottom shell (3) being a light-absorbing element; the filter assembly (2) includes a filter frame (5) and a filter (6) disposed in the filter frame (5). The edge of the bottom shell (3) and the edge of the cover plate (4) are formed by laser welding to form a sealed and fixed connection along the edge. The edge of the filter mesh skeleton (5) is fixed between the edge of the bottom shell (3) and the edge of the cover plate (4) and is formed by laser welding to the edge of the cover plate (4) to form a sealed and fixed connection along the edge.

2. The oil suction filter according to claim 1, characterized in that: The bottom shell (3) has a first horizontal part (7) along the edge and a first vertical part (8) on the first horizontal part (7); the cover plate (4) has a second horizontal part (9) along the edge and a second vertical part (10) on the second horizontal part (9); the first vertical part (8) is laser welded to the second horizontal part (9), and the second vertical part (10) is located outside the first vertical part (8).

3. An oil suction filter according to claim 2, characterized in that: The filter frame (5) has a third horizontal part (11) around the edge and a third vertical part (12) on the third horizontal part (11); the third horizontal part (11) is located between the first horizontal part (7) and the second horizontal part (9), the third vertical part (12) is laser welded to the second horizontal part (9), and the third vertical part (12) is located inside the first vertical part (8).

4. An oil suction filter according to claim 3, characterized in that: The first horizontal part (7) is also provided with a fourth vertical part (13), which is located inside the first vertical part (8) and abuts against the third horizontal part (11).

5. An oil suction filter according to claim 1, characterized in that: The cover plate (4) is provided with an inlet (14), and the bottom shell (3) is provided with an outlet (15).

6. An oil suction filter according to claim 5, characterized in that: The outlet (15) is located at one end of the side of the bottom shell (3), and the bottom shell (3) is provided with a guide rib (16) that also serves as a support.

7. An oil suction filter according to claim 1, characterized in that: The bottom shell (3) is also provided with a bushing bolt fixing part (17) at its end.

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