Oil filter and transmission

Abstract

The utility model belongs to filter technical field especially relates to an oil suction filter and transmission, the oil suction filter, its configuration is in transmission casing, include: shell, it has oil inlet and oil outlet, oil inlet communicates transmission casing, oil outlet communicates oil pump, filter screen, it sets up in the shell inside, separates oil inlet with oil outlet, check structure, sets up at oil inlet, check structure includes sealing sheet and elastic piece, when oil pump stops, elastic piece acts on sealing sheet to block up oil inlet, when oil pump starts, sealing sheet overcomes the force of elastic piece to open oil inlet. The automatic opening and closing of check structure under the start -stop state of oil pump, when oil pump starts again, the inside of oil suction filter has been full of lubricating oil, and oil pump can quickly establish oil pressure, to improve response efficiency.

Description

Technical Field

[0001] This utility model relates to the field of filtration technology, and in particular to an oil suction filter and a transmission. Background Technology

[0002] In mechanical transmission devices such as gearboxes, the lubrication system is crucial. It uses an oil pump to force lubricating oil to various moving parts to reduce friction and wear. As a key component of the lubrication system, the suction filter is usually located at the oil inlet of the oil pump and is immersed in the lubricating oil in the transmission housing. It is used to filter out impurities from the lubricating oil before it enters the oil pump, ensuring the cleanliness of the lubricating oil.

[0003] The oil suction filter needs to be used in conjunction with the oil pump. When the oil pump is working, it generates negative pressure, which causes the lubricating oil in the transmission housing to enter the oil suction filter from the inlet. After being filtered by the filter screen, the clean lubricating oil is pumped out from the outlet and finally delivered to the target location.

[0004] However, when the oil pump stops, the lubricating oil remaining inside the suction filter and in the connected oil passages will flow back into the transmission housing through the inlet under the influence of gravity or pressure balance. This results in the suction filter being in an "incomplete" state when the oil pump starts again. The oil pump needs to spend extra time refilling the suction filter before it can build up sufficient oil pressure, leading to slow pressure build-up and low response efficiency. Utility Model Content

[0005] To improve the pressure build-up speed and response efficiency of the oil pump, this utility model provides an oil suction filter and a transmission.

[0006] According to an embodiment of the present invention, a first aspect provides an oil suction filter disposed within a transmission housing, comprising: The housing has an oil inlet and an oil outlet, the oil inlet being connected to the transmission housing and the oil outlet being connected to the oil pump; A filter screen, disposed inside the housing, separates the oil inlet and the oil outlet; A check valve structure is provided at the oil inlet. The check valve structure includes a sealing plate and an elastic element. When the oil pump stops, the elastic element acts on the sealing plate to block the oil inlet. When the oil pump starts, the sealing plate overcomes the force of the elastic element to open the oil inlet.

[0007] In some embodiments, both the sealing sheet and the elastic element are disposed inside the housing.

[0008] In some embodiments, the upper end of the elastic element is fixed, the lower end of the elastic element is connected to the sealing sheet, and the elastic element pushes the sealing sheet downward to block the oil inlet.

[0009] In some embodiments, the upper end of the elastic element is fixed to the filter screen.

[0010] In some embodiments, the upper end of the elastic element is connected to the sealing sheet, the lower end of the elastic element is fixed to the outside of the housing, and the oil inlet is blocked by pulling the sealing sheet downward.

[0011] In some embodiments, the check structure further includes a central post, which passes through the inner side of the elastic member and is used to vertically limit the elastic member.

[0012] In some embodiments, the upper end of the central column is fixed to the filter screen, and there is a gap between the lower end of the central column and the sealing sheet.

[0013] In some embodiments, the lower end of the central column is connected to the sealing sheet, and the upper end of the central column has a gap with the filter screen.

[0014] In some embodiments, the housing includes an upper housing portion and a lower housing portion, and a groove structure is formed at the connection between the upper housing portion and the lower housing portion, and the filter screen is embedded in the groove structure.

[0015] According to an embodiment of the present invention, a second aspect provides a transmission in which the aforementioned oil filter is disposed within the transmission housing.

[0016] The oil suction filter of this invention works in conjunction with an oil pump. When the oil pump is operating, its operation creates a negative pressure inside the oil suction filter, resulting in an internal pressure significantly lower than that inside the transmission housing. This pressure difference pushes the sealing plate against the elastic element, opening the oil inlet and allowing lubricating oil to enter the oil suction filter and be pumped out by the oil pump. When the oil pump stops, the pressure difference between the oil suction filter and the transmission housing returns to equilibrium, and the elastic element pushes the sealing plate to re-seal the oil inlet, preventing the lubricating oil remaining inside the oil suction filter from flowing back. The check valve automatically opens and closes during oil pump start-stop operations. When the oil pump restarts, the oil suction filter is already filled with lubricating oil, allowing the oil pump to quickly build up oil pressure and improve response efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an oil suction filter installed inside the transmission housing according to one embodiment of the present invention; Figure 2 This is a cross-sectional structural diagram of an oil suction filter according to one embodiment of the present invention.

[0018] In the diagram: oil suction filter 10; housing 11; upper housing 111; lower housing 112; filter screen 12; oil inlet 13; oil outlet 14; sealing plate 15; elastic element 16; center column 17; transmission housing 20; oil pump 30. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figure 1 As shown, this embodiment provides an oil suction filter 10, which is disposed inside the transmission housing 20, specifically near the bottom of the transmission housing 20. See details... Figure 2 The oil suction filter 10 includes a housing 11 and a filter screen 12. The housing 11 has an oil inlet 13 on the lower side and an oil outlet 14 on the upper side. The filter screen 12 is disposed inside the housing 11, dividing the interior of the housing 11 into an oil inlet side and an oil outlet side, thereby separating the oil inlet 13 from the oil outlet 14. When lubricating oil in the transmission housing 20 flows through the oil suction filter 10, the lubricating oil first enters the interior of the housing 11 through the oil inlet 13, then flows through the filter screen 12 to remove impurities, and finally flows out through the oil outlet 14, thus ensuring the cleanliness of the lubricating oil.

[0023] In this embodiment, the oil inlet 13 of the suction filter 10 is connected to the interior of the transmission housing 20, while the oil outlet 14 is connected to the oil pump 30. When the oil pump 30 is working, it generates negative pressure to provide power for the flow of lubricating oil.

[0024] During the operation of the oil pump 30, the power provided by the oil pump 30 first fills the internal space of the suction filter 10 with lubricating oil, and then it is pumped to the target part. When the oil pump 30 stops, if no check structure is set, the lubricating oil in the suction filter 10 will flow back into the transmission housing 20 through the oil inlet 13. When the oil pump 30 is restarted, the lubricating oil needs to be refilled inside the suction filter 10, which results in a longer pressure build-up time and low response efficiency of the oil pump 30.

[0025] To address the aforementioned issues, the oil suction filter 10 of this embodiment further includes a check structure disposed at the oil inlet 13. The check structure includes a sealing plate 15 and an elastic element 16. When the oil pump 30 is stopped, the elastic element 16 acts on the sealing plate 15 to block the oil inlet 13; when the oil pump 30 is started, the sealing plate 15 overcomes the force of the elastic element 16 to open the oil inlet 13.

[0026] Specifically, when the oil pump 30 is operating, its operation creates a negative pressure inside the oil suction filter 10, resulting in a pressure significantly lower than that inside the transmission housing 20. This pressure difference pushes the sealing plate 15 to overcome the force of the elastic element 16 and open the oil inlet 13, allowing lubricating oil to enter the oil suction filter 10 through the inlet 13 and be pumped out by the oil pump 30. When the oil pump 30 stops, the pressure difference between the oil suction filter 10 and the transmission housing 20 returns to equilibrium, and the elastic element 16 pushes the sealing plate 15 to re-seal the oil inlet 13, preventing the lubricating oil remaining inside the oil suction filter 10 from flowing back. When the oil pump 30 restarts, the oil suction filter 10 is already filled with lubricating oil, allowing the oil pump 30 to quickly build up oil pressure, thereby improving response efficiency.

[0027] In this embodiment, the sealing plate 15 is disposed inside the housing 11, and the elastic element 16 can be a compression spring. The upper end of the elastic element 16 is fixed inside the housing 11, and the lower end is connected to the sealing plate 15. The oil inlet 13 is blocked by pushing the sealing plate 15 downward. By arranging the entire check valve structure inside the housing 11, interference with other components inside the transmission housing 20 can be effectively avoided. Preferably, the upper end of the elastic element 16 is fixed to the filter screen 12, which facilitates installation and simplifies the structure. In some embodiments, a dedicated positioning seat can also be provided inside the housing 11 to fix the upper end of the elastic element 16 according to actual structural requirements. In some embodiments, the elastic element 16 can also be a tension spring. The upper end of the elastic element 16 is connected to the sealing plate 15, and the lower end is fixed to the outside of the housing 11. The oil inlet 13 is blocked by pulling the sealing plate 15 downward by the elastic element 16.

[0028] To further improve the operational stability of the check valve structure, this embodiment also includes a central post 17, which passes through the inner side of the elastic element 16. In this embodiment, the upper end of the central post 17 is fixed to the filter screen 12, and the lower end maintains a preset distance from the sealing sheet 15. In some embodiments, the upper end of the central post 17 maintains a preset distance from the filter screen 12, while the lower end is connected to the sealing sheet 15. The distance is set to avoid interfering with the displacement of the sealing sheet 15 during movement. At the same time, the central post 17 can limit the elastic element 16 vertically to prevent it from tilting and ensure the accuracy of the movement of the sealing sheet 15.

[0029] In this embodiment, the outer shell 11 specifically includes an upper shell portion 111 and a lower shell portion 112. A groove structure is formed at the connection between the upper shell portion 111 and the lower shell portion 112, and the filter screen 12 is embedded in the groove structure, thereby achieving reliable installation of the filter screen 12. The oil outlet 14 is located in the upper shell portion 111, and the oil inlet 13 is located in the lower shell portion 112. The upper shell portion 111 and the lower shell portion 112 can be integrated by welding to ensure a firm connection.

[0030] The principle of the oil suction filter 10 in this embodiment is as follows: When the oil pump 30 starts working, a negative pressure is generated inside the oil suction filter 10, creating a pressure difference with the transmission housing 20. This pressure difference causes the sealing plate 15 of the check valve structure to move upward against the force of the elastic element 16, thereby opening the oil inlet 13. At this time, the lubricating oil in the transmission housing 20 flows sequentially through the oil inlet 13, the open check valve structure, the filter screen 12, and the oil outlet 14, and is finally drawn in by the oil pump 30 and pumped to the target location.

[0031] When the oil pump 30 stops, the negative pressure inside the oil suction filter 10 disappears, and the pressure difference returns to equilibrium. The elastic element 16 of the check valve pushes the sealing plate 15 downward to reset, tightly sealing the oil inlet 13. This action cuts off the return path of the lubricating oil, preventing the lubricating oil from flowing back to the transmission housing 20 through the oil inlet 13.

[0032] The check valve automatically opens and closes during the start-up and shutdown of the oil pump 30. The oil suction filter 10 ensures that the oil pump 30 is filled with lubricating oil when it is restarted, thereby achieving rapid pressure build-up and efficient response of the oil pump 30.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An oil suction filter disposed within a transmission housing (20), characterized in that, include: The housing (11) has an oil inlet (13) and an oil outlet (14), the oil inlet (13) being connected to the transmission housing (20) and the oil outlet (14) being connected to the oil pump (30). A filter screen (12) is disposed inside the housing (11) to separate the oil inlet (13) and the oil outlet (14); A check valve structure is provided at the oil inlet (13). The check valve structure includes a sealing plate (15) and an elastic element (16). When the oil pump (30) stops, the elastic element (16) acts on the sealing plate (15) to block the oil inlet (13). When the oil pump (30) starts, the sealing plate (15) overcomes the force of the elastic element (16) to open the oil inlet (13).

2. The oil suction filter according to claim 1, characterized in that: Both the sealing sheet (15) and the elastic element (16) are disposed inside the outer casing (11).

3. The oil suction filter according to claim 2, characterized in that: The upper end of the elastic element (16) is fixed, and the lower end of the elastic element (16) is connected to the sealing plate (15). The elastic element (16) pushes the sealing plate (15) downward to block the oil inlet (13).

4. The oil suction filter according to claim 3, characterized in that: The upper end of the elastic element (16) is fixed to the filter screen (12).

5. The oil suction filter according to claim 1, characterized in that: The upper end of the elastic element (16) is connected to the sealing sheet (15), and the lower end of the elastic element (16) is fixed to the outside of the housing (11), and the oil inlet (13) is blocked by pulling the sealing sheet (15) downward.

6. The oil suction filter according to any one of claims 1-5, characterized in that: The check structure also includes a central post (17), which passes through the inner side of the elastic member (16) and is used to vertically limit the elastic member (16).

7. The oil suction filter according to claim 6, characterized in that: The upper end of the central column (17) is fixed to the filter screen (12), and there is a gap between the lower end of the central column (17) and the sealing sheet (15).

8. The oil suction filter according to claim 6, characterized in that: The lower end of the central column (17) is connected to the sealing sheet (15), and there is a gap between the upper end of the central column (17) and the filter screen (12).

9. The oil suction filter according to claim 1, characterized in that: The outer shell (11) includes an upper shell portion (111) and a lower shell portion (112). A groove structure is formed at the connection between the upper shell portion (111) and the lower shell portion (112). The filter screen (12) is embedded in the groove structure.

10. A transmission, characterized in that, The transmission housing (20) is provided with an oil suction filter (10) as described in any one of claims 1-9.

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