Oil-proof assembly, oil-proof ventilation valve and device with oil tank

Abstract

The utility model discloses an oil-proof assembly, an oil-proof ventilation valve and a device with an oil tank. The oil-proof assembly comprises a valve body, the middle of the valve body is provided with a cavity penetrating through the two ends of the valve body, the valve body comprises a first end and a second end, the first end is provided with an oil passing opening communicating the cavity with the outside, and the second end of the cavity is configured to be communicated with an external ventilation channel; the first filtering piece is arranged in the cavity of the first end; the limiting piece is arranged in the cavity of the second end and is provided with a through hole for ventilation; the waterproof breathable film is arranged in the cavity of the second end and located between the limiting piece and the breathable channel. The elastic piece is arranged between the first filtering piece and the limiting piece; one side of the second pressing plate abuts against the first filtering part, the other side of the second pressing plate abuts against one end of the elastic part, and a plurality of second air holes are formed in the second pressing plate and are opposite to the first filtering part. According to the oil-proof assembly, the oil-proof ventilation valve and the device with the oil tank, the maintenance cost can be reduced, and the service life can be prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of oil prevention, and in particular to an oil prevention component, an oil prevention breathable valve, and a device with an oil tank. Background Art

[0002] Traditional devices with oil tanks, such as gearboxes (automotive reducers, transmissions, or three-in-one oil-cooled motors), usually require oil-proof breathable valves to balance the pressure difference between the inside and outside of the box and prevent contaminants from entering the box. Currently, oil-proof breathable products on the market usually use valve bodies with filter elements to filter the oil, gas, or oil mist inside the box, preventing oil and gas from accumulating on the surface of the waterproof breathable membrane and affecting the breathable performance of the waterproof breathable membrane.

[0003] However, over time, filter saturation can occur, leading to insufficient filtration and a decrease in permeability, impacting product performance and preventing oil-proof ventilation. To ensure effective filtration and ventilation, the filter element must be promptly replaced or actively drained. Both frequent maintenance and increased maintenance costs for the oil-proof ventilation valve can shorten the lifespan of the valve and even the end product. Utility Model Content

[0004] In order to solve the above-mentioned problems existing in the prior art, the present application provides an oil-proof component, an oil-proof breathable valve and a device with an oil tank, which can increase the service life of the oil-proof component.

[0005] This application provides the following technical solutions:

[0006] In a first aspect, the present application provides an oil-proof assembly, comprising:

[0007] A valve body, wherein a cavity is provided in the middle portion thereof and passes through both ends of the valve body. The valve body includes a first end and a second end. An oil port is provided at the first end to connect the cavity with the outside. The cavity is configured to communicate with an external air passage at the second end.

[0008] a first filter element disposed in the cavity of the first end;

[0009] a limiting member, disposed in the cavity of the second end, and provided with a through hole for ventilation;

[0010] a waterproof breathable membrane, disposed in the cavity of the second end and located between the limiting member and the breathable passage;

[0011] an elastic member disposed between the first filter element and the limiting member, wherein the elastic member is configured such that when the first filter element absorbs oil and expands, at least a portion of the oil absorbed in the first filter element can be squeezed out by a thrust force of the elastic member; and

[0012] The second pressing plate has one side in contact with the first filter element and the other side in contact with one end of the elastic element. The second pressing plate is provided with a plurality of second air holes, which are opposite to the first filter element.

[0013] In one embodiment, the oil-proof component further comprises:

[0014] a first pressing plate, one side of which abuts against the first filter element, the first pressing plate being provided with a plurality of first ventilation holes, the first ventilation holes being opposite to the first filter element; and

[0015] A plurality of steps are provided, wherein the steps abut against the other side of the first pressing plate, and a gap is formed between the oil port and the first pressing plate through the steps.

[0016] In one embodiment, guide grooves are provided between the steps and between the steps and the cavity wall of the cavity, and the first air vent is opposite to the guide grooves.

[0017] In one embodiment, the oil passage opening is a strip-shaped opening, one end of the guide groove is opposite to the strip-shaped opening, and a slope is provided between the guide groove and the oil passage opening.

[0018] In one embodiment, a first sealing ring is provided at the periphery of the first pressure plate, and the first pressure plate is in abutment and sealed against the cavity wall of the cavity through the first sealing ring.

[0019] In one embodiment, a positioning structure for positioning the elastic member is provided in the middle of the second pressing plate and the limiting member.

[0020] In one embodiment, a second sealing ring is provided at the periphery of the second pressure plate, and the second pressure plate is in abutment and sealed against the cavity wall of the cavity through the second sealing ring.

[0021] In one embodiment, the oil-proof component further comprises:

[0022] The partition plate has one side in contact with the second filter element and the other side in contact with one side of the waterproof breathable membrane. The partition plate is provided with a plurality of third air holes, and the third air holes are opposite to the second filter element.

[0023] In one embodiment, the diameter of the limiting element on the side close to the second filter element is larger than the diameter of the side close to the first filter element, and the diameter of the second filter element is larger than the diameter of the first filter element.

[0024] In one embodiment, the first filter element is a filter structure formed by stacking multiple filter elements.

[0025] In a second aspect, the present application further provides an oil-proof breathable valve, the oil-proof breathable valve comprising:

[0026] Oil-resistant components; and

[0027] a protective cover, disposed at the second end of the valve body of the oil-proof assembly, and a venting passage disposed between the protective cover and the valve body;

[0028] Wherein, the oil-proof component is the oil-proof component described in any one of the above items.

[0029] In a third aspect, the present application further provides a device having a fuel tank, the device comprising:

[0030] fuel tank; and

[0031] An oil-proof breathable valve is installed on the oil tank, and the oil-proof breathable valve is the oil-proof breathable valve described above.

[0032] As can be seen from the above, the oil-proof assembly, oil-proof breathable valve, and device with an oil tank provided by the present application are provided with a waterproof breathable membrane, a first filter element, and a limiter, and a second pressure plate and an elastic member are provided between the limiter and the first filter element. When oil gas or oil mist enters the cavity of the valve body through the oil port, the first filter element expands in volume after absorbing the oil gas or oil mist, and the elastic member applies a thrust to the first filter element. When the first filter element expands to a certain extent, the elastic member can automatically squeeze out the excess oil in the first filter element through the second pressure plate, and the oil can flow back through the oil port of the valve body. The oil-proof assembly can avoid the problem of the first filter element being oversaturated and affecting its filtering and breathability performance, and does not require frequent maintenance, thereby reducing the maintenance cost of the oil-proof assembly, oil-proof breathable valve, and device with an oil tank. In addition, the provision of a waterproof breathable membrane can achieve good waterproof and breathable functions while achieving the oil-proof function, thereby extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic structural diagram of the explosion-proof component provided in an embodiment of the present application.

[0034] Figure 2 A schematic cross-sectional view of part of the structure of the oil-proof structure provided in an embodiment of the present application.

[0035] Figure 3 Another schematic cross-sectional view of a partial structure of the oil-proof structure provided in an embodiment of the present application.

[0036] Figure 4This is a schematic structural diagram from an exploded perspective of part of the structure of the oil-proof component provided in an embodiment of the present application.

[0037] Figure 5 This is a schematic cross-sectional view of the oil-proof structure according to an embodiment of the present application.

[0038] Figure 6 This is a schematic structural diagram of another explosion perspective of the oil-proof component provided in an embodiment of the present application. Figure 7 This is a schematic structural diagram of the oil-proof breathable valve provided in an embodiment of the present application.

[0039] Figure 8 A schematic structural diagram of a device with a fuel tank provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] To facilitate understanding of the present application, the present application will be described more fully below in conjunction with the accompanying drawings and specific examples. The accompanying drawings provide preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0041] Please refer to Figure 1 , Figure 1 The explosion perspective structure of the oil-proof component provided in an embodiment of the present application is shown in FIG.

[0042] like Figure 1 As shown, the oil-proof structure includes a valve body 1 , a first filter element 2 , a limiting element 3 and an elastic element 4 .

[0043] The middle part of the valve body 1 is provided with a cavity 11 that passes through both ends of the valve body 1. The valve body 1 includes a first end 1a and a second end 1b. The first end 1a is provided with an oil port 12 that connects the cavity 11 with the outside. The cavity 11 is configured to communicate with an external air passage at the second end 1b.

[0044] The valve body 1 can be made of metal or plastic to ensure its structural strength. The valve body 1 can be mounted on the fuel tank body by providing mounting structures at the first end 1a or the second end 1b. For example, the outer side of the first end 1a can be provided with threads for securing the valve body to the fuel tank body. Alternatively, the valve body 1 can be secured to the fuel tank body by providing screw holes at the second end 1b. The specific securing method is not limited in this application.

[0045] Among them, the first end 1a of the valve body 1 can be used to be installed on the tank body or inside the tank body, and the oil gas, oil mist or liquid oil inside the tank can enter the cavity 11 of the valve body 1 through the oil port 12 set at the first end 1a of the valve body 1, or re-enter the oil tank from the cavity 11 through the oil port 12.

[0046] The second end 1b of the valve body 1 can be disposed on or outside the fuel tank. The cavity 11 at the second end 1b of the valve body 1 can be connected to an external ventilation channel, thereby allowing gas inside the fuel tank to communicate with the external ventilation channel through the cavity 11. Specifically, the valve body 1 can be provided with an opening at the second end 1b, through which the cavity 11 communicates with the outside, thereby ensuring ventilation between the interior of the fuel tank and the outside through the cavity 11 of the valve body 1.

[0047] The first filter element 2 is disposed within the cavity 11 of the first end 1a. Specifically, the diameter of the first filter element 2 is adapted to the diameter of the cavity 11, thereby absorbing oil vapor, oil mist, or liquid oil that enters the cavity 11 through the oil port 12. This ensures that the gas discharged from the air permeable passage is substantially free of oil vapor, oil mist, or liquid oil, thereby achieving an oil-proof effect.

[0048] In some embodiments, the first filter element 2 can be made of an oil-absorbing material, such as sponge, fiber, or other single or composite materials. In order to improve the adsorption effect on oil gas, oil mist, or liquid oil, the first filter element 2 can adopt a filter structure formed by stacking filter elements made of multiple pieces of oil-absorbing materials. The oil gas, oil mist, or liquid oil in the gas will contact the outermost filter element, and the first filter element 2 will absorb them in a saturated manner in layers, so that the first filter element 2 can obtain a more uniform absorption effect. In addition, the stacked filter structure can greatly increase the contact area between the filter element and the substance to be filtered, and increase the adsorption area for oil gas, oil mist, or liquid oil. In addition, through the stacked setting, the first filter element 2 can improve the flow of fluid between layers, forming a flow channel or vortex, which is conducive to full contact between the fluid and the first filter element 2 and improving the adsorption efficiency.

[0049] Furthermore, the first filter element 2 can also incorporate an adsorbent specifically designed for oil vapor, oil mist, or liquid oil to enhance adsorption. Furthermore, the layered filter structure ensures a more uniform distribution of the adsorbent within the filter block. As the fluid flows between the layers, each portion of the adsorbent is ensured to fully exert its adsorption effect, preventing localized overuse or underuse of the adsorbent and thereby increasing adsorbent utilization within the entire filter block. It is understood that the adsorbent can be any known adsorbent specifically designed for oil vapor, oil mist, or liquid oil, and this application does not provide a comprehensive list of these.

[0050] It's relatively difficult to combine and optimize different adsorbents in a monolithic adsorption filter block. Often, only a single type of adsorbent can be used, making it difficult to simultaneously and efficiently adsorb multiple substances with different properties. In one embodiment, adsorbents of different types or properties can be placed in different layers based on different adsorption requirements. For example, the first layer can contain an adsorbent with good adsorption effects on larger particles, while the second layer can contain an adsorbent with high selectivity for specific chemical components. This combination allows for more targeted and efficient adsorption of complex mixtures, improving the filter block's overall adsorption performance.

[0051] The stopper 3 is disposed within the cavity 11 at the second end 1b and is provided with a through hole 31 for ventilation. The elastic member 4 is disposed between the first filter element 2 and the stopper 3. When the first filter element 2 expands after absorbing oil, the elastic member 4 applies a thrust to the filter element, thereby squeezing out at least a portion of the oil absorbed by the first filter element 2. In one embodiment, the elastic member 4 may be a spring or a material with elastic deformation properties, such as rubber, but this application is not limited thereto.

[0052] The stopper 3 abuts the wall of the cavity 11, confining the elastic member 4 within the space between the first filter element 2 and the stopper 3. When the first filter element 2 is not absorbing oil, the elastic member 4 can be set to a pre-compressed state or an uncompressed state. When the first filter element 2 expands after absorbing oil, its volume increases due to the absorption of oil vapor, oil mist, or liquid oil. At this time, the expanded first filter element 2 squeezes the elastic member 4, which in turn applies a certain thrust to the first filter element 2.

[0053] When the oil in the first filter element 2 is not saturated and the thrust applied by the elastic member 4 to the first filter element 2 is less than a preset value, the thrust of the elastic member 4 on the first filter element 2 is insufficient to offset the thrust applied by the expansion of the first filter element 2 on the elastic member 4. At this time, the oil in the first filter element 2 cannot be squeezed out by the elastic member 4, and the first filter element 2 continues to absorb oil gas, oil mist or liquid oil. The elastic member 4 continues to be further compressed, and the thrust of the elastic member 4 on the first filter element 2 continues to increase.

[0054] When the oil in the first filter element 2 reaches a certain level of saturation and the thrust exerted by the elastic member 4 on the first filter element 2 is greater than or equal to a preset value, the thrust exerted by the compressed elastic member 4 on the first filter element 2 is greater than or equal to the thrust exerted on the elastic member 4 by the expansion of the first filter element 2. At this time, the first filter element 2 cannot absorb oil further and expand, and at least part of the oil in the first filter element 2 will be squeezed out by the elastic member 4. In some cases, the squeezed oil can flow back into the oil tank through the oil port 12.

[0055] The oil-proof component is provided with an elastic member 4, which can exert a certain thrust on the first filter element 2 when it reaches a certain saturation level, and can squeeze out the excess oil in the first filter element 2, so as to prevent the first filter element 2 from further absorbing oil and affecting the filtering and ventilation efficiency, so that the first filter element 2 will not be in an oversaturated state, thereby ensuring the filtering and ventilation performance of the oil-proof component.

[0056] In one embodiment, the preset value may be set to 6-15 N. The preset value may be slightly lower than the thrust on the elastic member 4 generated when the first filter element 2 is fully saturated, so that the first filter element 2 always remains in an unsaturated state.

[0057] Of course, the preset value can also be set so that the oil in the first filter element 2 is squeezed out only when the thrust exerted by the compressed elastic member 4 on the first filter element 2 is greater than the thrust exerted on the elastic member 4 by the expansion of the first filter element 2. The preset value can be determined based on different filter materials, and the elastic modulus of the elastic member 4 can be adjusted based on actual measurement results, so that when the first filter element 2 reaches a certain saturation level, the thrust exerted by the elastic member 4 on the first filter element 2 is greater than or equal to the preset value, allowing the elastic member 4 to smoothly squeeze out excess oil absorbed by the first filter element 2.

[0058] In this embodiment, to enhance the reliability of the oil-proof assembly's ventilation function, the assembly further includes a waterproof, breathable membrane 8. This membrane 8 is disposed within the cavity 11 at the second end, between the stopper 3 and the ventilation passage. This membrane 8 can be made of e-PTFE or other membrane materials that are both waterproof and breathable. The provision of this membrane 8 ensures the oil-proof function while preventing external dust or moisture from entering the valve body 1 and potentially affecting the filter element's oil absorption performance.

[0059] This embodiment may further include a second pressing plate 6, one side of which abuts the first filter element 2 and the other side of which abuts one end of the elastic member 4. The second pressing plate 6 is provided with a plurality of second air holes 61, which are opposite to the first filter element 2. The second air holes 61 of the second pressing plate 6 can guide the gas in the first filter element 2 to be discharged through the second air holes 61, or the gas at the second end can enter the first filter element 2 through the second air holes 61, thereby improving the filtering and air permeability performance of the first filter element 2.

[0060] In one embodiment, a positioning structure is provided in the middle of the second pressing plate 6 and the stopper 3 for positioning the elastic member 4. The positioning structure enables the elastic member 4 to act on the middle portion of the second pressing plate 6. This, combined with the abutment of the second pressing plate 6 against the first filter element 2, improves the uniformity of the thrust applied by the elastic member 4 to the first filter element 2 via the second pressing plate 6, thereby enhancing the oil extrusion effect on the first filter element 2.

[0061] See also Figure 2-3 The figure shows a partial structural cross-section of the oil-proof structure provided in an embodiment of the present application and a schematic diagram of another cross-section.

[0062] like Figure 2-3 As shown, the oil-proof structure has Figure 1 In addition to the structure in FIG, it also includes a first pressing plate 5 and a plurality of steps 13.

[0063] One side of the first pressure plate 5 abuts the first filter element 2, and the other side abuts the step 13. The first pressure plate 5 is provided with a plurality of first air holes 51, which face the first filter element 2. Furthermore, a gap is formed between the oil port 12 and the first pressure plate 5 by the step 13.

[0064] The first pressure plate 5 abuts one side of the first filter element 2, and its diameter matches the diameter of the cavity 11, allowing the periphery of the first pressure plate 5 to abut the inner wall of the cavity 11. Furthermore, the first air holes 51 are positioned opposite the first filter element 2, allowing oil gas, oil mist, or liquid oil to enter the first filter element 2 through the first air holes 51, or for the gas or oil in the first filter element 2 to be discharged through the first air holes 51, thereby improving the filtering performance of the oil-proof component. A step 13 forms a clearance area between the oil port 12 and the first pressure plate 5. After gas enters the clearance area of ​​the cavity 11 through the oil port 12, it enters the first filter element 2 through each first air hole 51, thereby improving the air permeability of the oil-proof component. It is understood that the number of first air holes 51 can be multiple, and the specific number can be determined according to actual needs.

[0065] In one embodiment, guide grooves 14 are provided between the steps 13 and between the steps 13 and the wall of the cavity 11. The first air vents 51 are opposite these guide grooves 14. In addition to allowing gas to flow into the fuel tank, the first air vents 51 also allow oil squeezed out by the elastic member 4 to flow out. The oil squeezed out by the elastic member 4 can flow into the guide grooves 14 through the first air vents 51 and ultimately flow back into the fuel tank through the oil port 12. The design of these guide grooves 14 ensures the return of the squeezed oil, preventing oil accumulation within the cavity 11 and affecting ventilation performance.

[0066] Furthermore, the oil passage port 12 is a strip-shaped port, one end of the guide groove 14 is opposite to the strip-shaped port, and a slope 15 is provided between the guide groove 14 and the oil passage port 12. The oil passage port 12, which is set as a strip-shaped port, can prevent excessive oil gas, oil mist or liquid oil in the oil tank from entering the cavity 11 of the valve body 1, thereby affecting the service life of the first filter element 2. In addition, a slope 15 is provided between the guide groove 14 and the oil passage port 12, which can better discharge the liquid oil in the guide groove 14 through the oil port 12, ensure the filtering and air permeability of the oil-proof component, and extend its service life. Of course, the shape of the oil passage port 12 is not only a strip, but can also be set to a rectangular, triangular or circular shape, which can play the role of reducing the entry of oil gas, oil mist or liquid oil into the interior of the valve body 1.

[0067] See also Figure 4 , the figure shows the explosion perspective structure of part of the structure of the oil-proof component provided in an embodiment of the present application.

[0068] like Figure 4 As shown, the oil-proof component Figure 1-3 In addition to the structure shown, the second pressure plate 6 may also include a first sealing ring 52 and a second sealing ring 62. One side of the second pressure plate 6 abuts the first filter element 2, and the other side abuts one end of the elastic member 4. The second pressure plate 6 is provided with a plurality of second air holes 61, which are opposite to the first filter element 2. Similar to the first pressure plate 5, the second air holes 61 of the second pressure plate 6 can guide the gas in the first filter element 2 to be discharged through the second air holes 61, or the gas at the second end can enter the first filter element 2 through the second air holes 61, thereby improving the filtering and ventilation performance of the first filter element 2.

[0069] In one embodiment, the second pressure plate 6 and the stopper 3 are provided with a positioning structure in the middle for positioning the elastic member 4. By providing the positioning structure, the elastic member 4 can act on the middle portion of the second pressure plate 6, and in conjunction with the abutment of the second pressure plate 6 against the first filter element 2, the uniformity of the thrust applied by the elastic member 4 to the first filter element 2 via the second pressure plate 6 can be improved, thereby enhancing the oil extrusion effect on the first filter element 2. Furthermore, if the oil drain assembly is provided with a first pressure plate 5, one side of the first pressure plate 5 abuts the bottom of the first end, and the second pressure plate 6 abuts the elastic member 4, so that when the elastic member 4 applies thrust to the second pressure plate 6, the first filter element 2 is simultaneously subjected to the forces of the first and second pressure plates 5, 6, thereby achieving a better effect of draining excess oil from the first filter element 2.

[0070] In another embodiment, a first sealing ring 52 may be provided at the periphery of the first pressure plate 5, and the first pressure plate 5 is sealed against the cavity wall of the cavity 11 by the first sealing ring 52. Due to manufacturing errors, gaps will inevitably exist between the first pressure plate 5 and the cavity wall of the cavity 11, and between the first filter element 2 and the cavity wall of the cavity 11. The first sealing ring 52 can prevent oil gas, oil mist, or liquid oil from directly passing through the gaps between the first pressure plate 5 and the cavity wall of the cavity 11, and between the first filter element 2 and the cavity wall of the cavity 11 for discharge, thereby improving the filtering effect of the gas entering the valve body 1. Furthermore, if a waterproof breathable membrane 8 is provided on the second end of the valve body 1, the provision of the first sealing ring 52 can also increase the service life of the waterproof breathable membrane 8, thereby increasing the service life of the oil-proof breathable valve as a whole.

[0071] In yet another embodiment, if the oil-proof assembly includes a second pressure plate 6, a second sealing ring 62 is provided around the periphery of the second pressure plate 6. This sealing ring 62 seals the second pressure plate 6 against the wall of the cavity 11. The function of the second sealing ring 62 can be analogous to that of the first sealing ring 52, extending the service life of the oil-proof breathable valve. In practice, however, a sealing ring may be provided on only the first pressure plate 5 or the second pressure plate 6, or on both, depending on actual needs.

[0072] Please refer to 5-6, which shows the overall cross-sectional structure of the oil-proof structure provided in an embodiment of the present application and another explosion-view structure.

[0073] like Figure 5-6 As shown, the oil-proof structure includes a valve body 1 , a first filter element 2 , a limiting element 3 and an elastic element 4 .

[0074] The valve body 1 has a cavity 11 in its center, extending through both ends. The valve body 1 includes a first end and a second end. An oil port 12 is provided at the first end, connecting the cavity 11 with the outside. The cavity 11 is configured to communicate with an external air passage at its second end. The first filter element 2, elastic member 4, and retaining member 3 are sequentially disposed within the cavity 11. The elastic member 4 is configured to exert a thrust on the first filter element 2 when it expands upon absorbing oil, thereby allowing at least some of the oil absorbed within the first filter element 2 to be squeezed out by the thrust of the elastic member 4.

[0075] Specifically, the oil-proof structure also includes a first pressure plate 5 and a second pressure plate 6. The first pressure plate 5 abuts against the cavity wall 11 via a first sealing ring 52, and the second pressure plate 6 abuts against the cavity wall 11 via a second sealing ring 62. When the first filter element 2 absorbs oil and expands to a certain saturation level, and the thrust exerted by the elastic member 4 on the first filter element 2 via the second pressure plate 6 reaches a predetermined value, excess oil in the first filter element 2 is squeezed out. The squeezed oil flows out through the first air vent 51 and the oil outlet 12 in the first pressure plate 5, thereby preventing the first filter element 2 from becoming oversaturated and ensuring the filtering and air permeability performance of the first filter element 2 in the oil-proof assembly. Furthermore, the first sealing ring 52 can be sleeved around the periphery of the first pressure plate 5, and the second sealing ring 62 can be sleeved around the periphery of the second pressure plate 6. The first and second sealing rings 52 and 62 enhance the filtering effect. Of course, the first and second sealing rings 52 and 62 can be used alone or together as needed.

[0076] In this embodiment, to enhance the reliability of the oil-proof assembly's ventilation function, the assembly further includes a second filter element 7 and a waterproof, breathable membrane 8. The waterproof, breathable membrane 8 is disposed within the cavity 11 at the second end, between the stopper 3 and the ventilation passage. The waterproof, breathable membrane 8 can be made of e-PTFE or other membrane materials that are both waterproof and breathable. The provision of the waterproof, breathable membrane 8 ensures the oil-proof function while preventing external dust or moisture from entering the valve body 1 and potentially affecting the filter element's oil absorption performance.

[0077] The second filter element 7 is disposed between the stopper 3 and the external air passage, and between the stopper 3 and the waterproof breathable membrane 8. The second filter element 7 further filters and absorbs oil vapor, oil mist, or liquid oil in the gas filtered by the first filter element 2, ensuring oil-proofing effectiveness. It also prevents the oil vapor, oil mist, or liquid oil from affecting the waterproof breathable membrane 8, thereby extending the service life of the waterproof breathable membrane 8.

[0078] In one embodiment, the diameter of the stopper 3 on the side closest to the second filter element 7 is larger than the diameter on the side closest to the first filter element 2, and the diameter of the second filter element 7 is also larger than the diameter of the first filter element 2. This design of the stopper 3 ensures that any remaining oil vapor, oil mist, or liquid oil after filtration by the first filter element 2 is able to come into contact with the second filter element 7 as much as possible, preventing it from flowing out of the second filter element 7 through the gap between the second filter element 7 and the wall of the cavity 11, thereby affecting the oil-proofing effect. Furthermore, the through holes 31 in the stopper 3 can all face the second filter element 7, thereby enhancing the second filter element 7's filtering effect on oil vapor, oil mist, or liquid oil.

[0079] Similarly, the diameter of the second filter element 7 will be larger than that of the first filter element 2, thereby further improving the filtering effect of the second filter element 7. It is understandable that the diameters of the first filter element 2 and the second filter element 7 can be determined according to actual needs, and this application does not limit this.

[0080] To further extend the service life of the waterproof breathable membrane 8, a partition 9 is provided between the membrane 8 and the second filter element 7. One side of the partition 9 abuts the second filter element 7, and the other side abuts one side of the membrane 8. The partition 9 is provided with a plurality of third air holes, which face the second filter element 7. This partition 9 separates the membrane 8 from the second filter element 7, preventing contamination of the membrane 8 by oil absorbed by the second filter element 7. Furthermore, the third air holes of the partition 9 can be configured as relatively large holes to minimize their impact on ventilation performance.

[0081] A protective cap 10 is also provided on the exterior of the second end of the valve body 1. The protective cap 10 positions the waterproof breathable membrane 8 within the interior of the valve body 1, preventing external dust and sand from entering the valve body 1. This improves the service life of the waterproof breathable membrane 8 and other internal structures. A gap or slot may be left between the protective cap 10 and the valve body 1, thereby forming a breathable passage between the protective cap 10 and the valve body 1. This breathable passage ensures that the oil-proof structure has an oil-proof and breathable effect.

[0082] Furthermore, both the first filter element 2 and the second filter element 7 utilize a filtration structure formed by stacking multiple filter elements. This stacked filtration structure can enhance filtration performance. Of course, the first filter element 2 and the second filter element 7 can also utilize a single piece of filter material, depending on actual needs and not limited in this application.

[0083] The exterior of the valve body 1 may also be provided with external threads and a mounting seal 16 , which can ensure that the valve body 1 and the oil tank are in a sealed state when the valve body 1 is installed on the oil tank, and are easy to disassemble and use.

[0084] Through this design, substances such as gas, liquid oil, and oil vapor carried in the fuel tank enter cavity 11 through the oil hole of valve body 1 and are subsequently filtered through first filter element 2 and second filter element 7, thereby achieving oil-proofing. Furthermore, the waterproof and breathable membrane 8 cooperates with first and second filters 2 and 7 to achieve the ventilation function of the oil-proof assembly.

[0085] During operation, when the oil in the first filter element 2 is not saturated and the thrust exerted by the elastic member 4 on the first filter element 2 is less than a preset value, the thrust exerted by the elastic member 4 on the first filter element 2 is insufficient to offset the thrust exerted by the expansion of the first filter element 2 on the elastic member 4. At this point, the oil in the first filter element 2 cannot be squeezed out by the elastic member 4, and the first filter element 2 continues to absorb oil vapor, oil mist, or liquid oil. The elastic member 4 continues to be further compressed, and the thrust exerted by the elastic member 4 on the first filter element 2 continues to increase. When the oil in the first filter element 2 reaches a certain level of saturation and the thrust exerted by the elastic member 4 on the first filter element 2 is greater than or equal to the preset value, the thrust exerted by the compressed elastic member 4 on the first filter element 2 is greater than or equal to the thrust exerted by the expansion of the first filter element 2 on the elastic member 4. At this point, the first filter element 2 cannot absorb oil further and expand, and at least part of the oil in the first filter element 2 is squeezed out by the elastic member 4. In some cases, the squeezed oil can flow back into the oil tank through the oil port 12.

[0086] From the above, it can be seen that the design of the oil-proof component can avoid the problem of the first filter element 2 being over-saturated and affecting its filtering and breathability performance, while meeting the oil-proof and breathability requirements of the equipment, without the need for frequent maintenance, reducing the maintenance cost of the oil-proof component, oil-proof breathable valve and device with an oil tank, and extending its service life.

[0087] See also Figure 7 , the figure shows the structure of the oil-proof breathable valve provided in an embodiment of the present application.

[0088] like Figure 7 As shown, the oil-proof breathable valve includes an oil-proof assembly 20 and a protective cover 10. The protective cover 10 is mounted on the second end of the valve body of the oil-proof assembly 20, and a breathable passage is provided between the protective cover 10 and the valve body. The protective cover 10 places a waterproof breathable membrane inside the valve body to prevent external dust and sand from entering the valve body, thereby increasing the service life of the valve body's internal structure. A gap or groove can be left between the protective cover 10 and the valve body to form a breathable passage between the protective cover 10 and the valve body. This breathable passage ensures that the oil-proof structure has an oil-proof and breathable effect.

[0089] The oil-proof component 20 may include a valve body, a first filter element, a limiter and an elastic element. After the first filter element expands to a certain extent, the elastic element can automatically squeeze out excess oil in the first filter element, and the oil can flow back through the oil outlet of the valve body, thereby avoiding the problem of the first filter element being oversaturated and affecting its filtering and breathable performance. Frequent maintenance is not required, thereby reducing the maintenance cost of the oil-proof breathable valve. In addition, the provision of a waterproof and breathable membrane can ensure good waterproof and breathable functions while achieving the oil-proof function, thereby extending its service life.

[0090] In addition, the oil-proof breathable valve may also include external threads 17 and a mounting seal 16. These external threads 17 and mounting seal 16 ensure a seal between the valve body and the fuel tank when the valve body is mounted on the fuel tank, and facilitate assembly and disassembly. Of course, the oil-proof breathable valve may also include other structures, which are not further limited here.

[0091] The specific structure of the oil-proof component 20 can be referred to Figure 1-6 The specific structure of the oil-proof component 20 will not be described in detail in any embodiment.

[0092] See also Figure 8 , the figure shows the structure of the device with an oil tank provided in an embodiment of the present application.

[0093] Among them, the device 100 with an oil tank may include an oil tank and an oil-proof breathable valve 200. The device 100 with an oil tank may be a gearbox, such as an automobile reducer, a transmission, or an oil tank of a three-in-one oil-cooled motor, etc., or it may be other oil tanks loaded with oil liquids. This application does not limit the type of the oil tank and the oil liquid it contains.

[0094] Furthermore, the device 100 having a fuel tank may include, in addition to the fuel tank, a gear, a rack, or other mechanical mechanism that utilizes the oil in the fuel tank. The specific mechanical structure type is not limited. Of course, the device 100 having a fuel tank may also be a car, a ship, or other device 100 having a fuel tank and its power system.

[0095] The oil-proof breathable valve 200 can be referred to as Figure 1-7 The description of the oil-proof component in any embodiment and the oil-proof breathable valve 200 it constitutes, for example, includes components such as the valve 200 body, the first filter element, the limit element and the elastic element, so as to achieve the oil-proof breathable effect through the above-mentioned oil-proof component, and no further limitations are made here.

[0096] When the device 100 with an oil tank utilizes the oil-proof breathable valve 200 of the embodiment of the present application, it can also reduce maintenance costs and enhance the technical effectiveness of oil-proof and breathable properties. The provision of a waterproof and breathable membrane ensures excellent waterproof and breathable properties while maintaining oil-proof properties, thereby extending its service life. Furthermore, the oil-proof and breathable valve 200 can utilize its oil-proof and breathable properties to reduce the risk of equipment explosion, thereby enhancing the reliability of the device 100.

[0097] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0098] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0099] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0100] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0101] The above content is merely an example and illustration of the structure of this application. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the concept of this application, and these obvious alternative forms are all within the scope of protection of this application.

Claims

1. An oil-proof component, characterized in that: The oil-proof component comprises: A valve body, wherein a cavity is provided in the middle portion thereof and passes through both ends of the valve body. The valve body includes a first end and a second end. An oil port is provided at the first end to connect the cavity with the outside. The cavity is configured to communicate with an external air passage at the second end. a first filter element disposed in the cavity of the first end; a limiting member, disposed in the cavity of the second end, and provided with a through hole for ventilation; a waterproof breathable membrane, disposed in the cavity of the second end and located between the limiting member and the breathable passage; an elastic member disposed between the first filter element and the limiting member, wherein the elastic member is configured such that when the first filter element absorbs oil and expands, at least a portion of the oil absorbed in the first filter element can be squeezed out by a thrust force of the elastic member; and The second pressing plate has one side in contact with the first filter element and the other side in contact with one end of the elastic element. The second pressing plate is provided with a plurality of second air holes, which are opposite to the first filter element.

2. The oil-proof assembly according to claim 1, wherein: The oil-proof component also includes: a first pressing plate, one side of which abuts against the first filter element, the first pressing plate being provided with a plurality of first ventilation holes, the first ventilation holes being opposite to the first filter element; and A plurality of steps are provided, wherein the steps abut against the other side of the first pressing plate, and a gap is formed between the oil port and the first pressing plate through the steps.

3. The oil-proof assembly according to claim 2, characterized in that Guide grooves are provided between the steps and between the steps and the cavity wall of the cavity, and the first air vents are opposite to the guide grooves.

4. The oil-proof assembly according to claim 3, characterized in that The oil passage port is a strip-shaped port, one end of the guide groove is opposite to the strip-shaped port, and a slope is provided between the guide groove and the oil passage port.

5. The oil-proof assembly according to claim 2, wherein: A first sealing ring is provided at the periphery of the first pressing plate, and the first pressing plate is in contact and sealed with the cavity wall of the cavity through the first sealing ring.

6. The oil-proof assembly according to claim 1, wherein: The second pressing plate and the limiting member are provided with a positioning structure in the middle for positioning the elastic member.

7. The oil-proof assembly according to claim 1, wherein: A second sealing ring is provided at the periphery of the second pressing plate, and the second pressing plate is in contact and sealed with the cavity wall of the cavity through the second sealing ring.

8. The oil-proof assembly according to claim 1, wherein: The oil-proof component also includes: a second filter element, disposed between the stopper and the air permeable passage, and between the stopper and the waterproof breathable membrane; and The partition plate has one side in contact with the second filter element and the other side in contact with one side of the waterproof breathable membrane. The partition plate is provided with a plurality of third air holes, and the third air holes are opposite to the second filter element.

9. The oil-proof assembly according to claim 8, wherein: The diameter of the limiting element at the side close to the second filter element is larger than the diameter at the side close to the first filter element, and the diameter of the second filter element is larger than the diameter of the first filter element.

10. The oil-proof component according to any one of claims 1 to 9, characterized in that: The first filter element is a filter structure formed by stacking multiple filter elements.

11. An oil-proof breathable valve, characterized in that: The oil-proof breathable valve comprises: Oil-resistant components; and a protective cover, disposed at the second end of the valve body of the oil-proof assembly, and a venting passage disposed between the protective cover and the valve body; Wherein, the oil-proof component is the oil-proof component according to any one of claims 1-10.

12. A device having a fuel tank, characterized in that: The device comprises: fuel tank; and An oil-proof breathable valve is installed on the oil tank, and the oil-proof breathable valve is the oil-proof breathable valve according to claim 11.

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