Oilproof assembly, oilproof vent valve, and device with oil tank

Abstract

To provide an oilproof assembly which enables reduction of maintenance costs and extends a useful life, and to provide an oilproof vent valve and a device with an oil tank.SOLUTION: An oilproof assembly includes: a valve body 1 which is provided with a cavity located in the center and penetrating through both ends of the valve body, and includes a first end and a second end, and in which an oil passage port allowing communication between the cavity and the outside is provided at the first end and the cavity communicates with an external ventilation passage at the second end; a first filter element 2 provided in the cavity at the first end; a stopper member 3 provided in the cavity at the second end and provided with a through hole for ventilation; and an elastic member 4 provided between the first filter element and the stopper member. The elastic member is configured to apply a thrust to the filter element after the first filter element absorbs oil to swell, so that at least part of the oil absorbed in the first filter element can be extruded by the thrust of the elastic member.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present application relates to the field of oil protection technology, and in particular to an oil protection assembly, an oil protection vent valve, and an apparatus having an oil tank. [Background technology]

[0002] Conventional equipment with oil tanks, such as gearboxes (automobile reducers, transmissions, or three-in-one oil-cooled motors), generally require an oil-proof and ventilating valve to balance the pressure difference between the inside and outside of the housing and prevent contaminants from entering the housing. Currently available oil-proof and ventilating products generally use a valve body with a filter element to filter out oil, gas, or oil mist inside the housing, preventing the oil and gas from accumulating on the surface of the waterproof and ventilating membrane and affecting the breathability of the waterproof and ventilating membrane.

[0003] However, over time, the filter element will reach a state where its filtering is saturated, which not only reduces the filtering effect of the filter element but also reduces its breathability, affecting product performance and failing to meet the oil-proof and ventilating requirements. To ensure the filtering and venting effects of the filter element, it is necessary to replace the filter element in a timely manner or to actively drain oil from the filter element. Even if filter element replacement or active oil drainage is adopted, frequent maintenance is required, which increases the maintenance costs of the oil-proof and venting valve and, if maintenance is not carried out properly, will shorten the service life of the oil-proof and venting valve and ultimately the final product. Summary of the Invention [Problem to be solved by the invention]

[0004] In order to solve the above problems existing in the prior art, the present application provides an apparatus having an oil protection assembly, an oil protection vent valve, and an oil tank, which can improve the service life of the oil protection assembly.

[0005] This application provides the following technical solutions:

[0006] According to a first aspect, there is provided an oil protection assembly, the oil protection assembly comprising: a valve element having a cavity formed in a central portion thereof and penetrating both ends of the valve element, the valve element including a first end and a second end, the first end being provided with an oil passage port communicating the cavity with the outside, and the second end being configured so that the cavity communicates with an external ventilation passage; a first filter member disposed within the cavity at the first end; a stopper member provided in the cavity at the second end, the stopper member having a through hole for ventilation; The stopper member includes an elastic member provided between the first filtering member and the stopper member, and the elastic member is configured so that after the first filtering member absorbs oil and expands, at least a portion of the oil absorbed in the first filtering member is pushed out by the thrust of the elastic member.

[0007] In one embodiment, the oil protection assembly comprises: a first pressure plate, one side of which is in contact with the first filter member, the first pressure plate having a plurality of first vent holes formed therein, the first vent holes facing the first filter member; The oil passage hole may further include a plurality of steps that abut against the other side of the first pressure plate and form an empty space between the oil passage hole and the first pressure plate.

[0008] In one embodiment, flow guide grooves are provided between the steps and between the steps and the cavity wall of the cavity, and the first vent hole faces the flow guide grooves.

[0009] In one embodiment, the oil passage port is a belt-like port, one end of the guide groove faces the belt-like port, and a gradient is provided between the guide groove and the oil passage port.

[0010] In one embodiment, a first seal ring is provided on the periphery of the first pressure plate, and the first pressure plate abuts against the cavity wall of the cavity via the first seal ring to be sealed.

[0011] In one embodiment, the oil protection assembly comprises: a second pressure plate having one side contacting the first filter member and the other side contacting one end of the elastic member, the second pressure plate having a plurality of second vent holes formed therein, the second vent holes facing the first filter member; The second pressing plate and the stopper member are provided with a positioning structure at their central portions for positioning the elastic member.

[0012] In one embodiment, a second seal ring is provided on the periphery of the second pressing plate, and the second pressing plate abuts against the cavity wall of the cavity via the second seal ring to be sealed.

[0013] In one embodiment, the oil protection assembly comprises: a waterproof air-permeable membrane disposed within the cavity at the second end and positioned between the stopper member and the ventilation passage; In one embodiment, the oil protection assembly comprises: The fuel cell further includes a second filter member disposed between the stopper member and the ventilation passage. In one embodiment, the oil protection assembly comprises: a waterproof air-permeable membrane provided in the cavity at the second end and positioned between the stopper member and the ventilation passage; The waterproof air-permeable membrane further includes a partition plate having one side abutting the second filter member and the other side abutting one side of the waterproof air-permeable membrane, and the partition plate is provided with a plurality of third air vents, the third air vents facing the second filter member.

[0014] In one embodiment, the diameter of the stopper member on the side closer to the second filter member is larger than the diameter on the side closer to the first filter member, and the diameter of the second filter member is larger than the diameter of the first filter member.

[0015] In one embodiment, the first filter member is a filter structure formed by stacking a plurality of filter elements.

[0016] In one embodiment, the elastic member comprises: When the first filter member has not absorbed oil or has absorbed oil and expanded, and when the thrust force applied by the elastic member to the first filter member is smaller than a preset value, the oil in the first filter member is not pushed out by the elastic member, After the first filter member has absorbed oil and expanded, and when the thrust applied by the elastic member to the first filter member is equal to or greater than a predetermined value, at least a portion of the oil in the first filter member is pushed out by the elastic member.

[0017] According to a second aspect, the present application further provides an oil-proof and venting valve, the oil-proof and venting valve comprising: an oil-proof assembly; a protective cover provided on the second end of the valve body of the oil protection assembly, wherein a ventilation passage is provided between the protective cover and the valve body; Here, the oil protection assembly is the oil protection assembly described in any one of the above items.

[0018] According to a third aspect, the present application further provides an apparatus having an oil tank, said apparatus comprising: Oil tank and and an oil prevention and vent valve attached to the oil tank, the oil prevention and vent valve being the oil prevention and vent valve described above.

[0019] As can be seen from the above, the oil-prevention assembly, oil-prevention and vent valve, and oil tank apparatus according to the present application include a first filter member and a stopper member in the oil-prevention assembly, and an elastic member between the stopper member and the first filter member. When oil, gas, or oil mist enters the cavity of the valve body through the oil passage, the first filter member expands in volume after absorbing the oil, gas, or oil mist, and the elastic member applies a thrust to the first filter member. After the first filter member expands to a certain extent, the elastic member automatically pushes out the excess oil in the first filter member, which then flows back through the oil passage of the valve body. This oil-prevention assembly avoids the problem of the first filter member becoming oversaturated, which affects its filtering and ventilation performance, and does not require frequent maintenance. This reduces maintenance costs and extends the service life of the oil-prevention assembly, oil-prevention and vent valve, and oil tank apparatus. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a structural schematic diagram of an exploded view angle of an oil-proof assembly according to an embodiment of the present application; FIG. [Figure 2] 1 is a schematic cross-sectional view of a portion of an oil-proof structure according to an embodiment of the present application. FIG. [Figure 3] FIG. 2 is another cross-sectional schematic view of a partial structure of an oil-proof structure according to an embodiment of the present application. [Figure 4] 1 is a structural schematic diagram of an exploded view angle of a part of the structure of an oil-proof assembly according to an embodiment of the present application; FIG. [Figure 5] 1 is a schematic cross-sectional view of an oil-proof structure according to an embodiment of the present application; [Figure 6] FIG. 10 is a structural schematic diagram of another exploded view angle of the oil-proof assembly according to an embodiment of the present application. [Figure 7] 1 is a structural schematic diagram of an oil-proof and venting valve according to an embodiment of the present application; [Figure 8] 1 is a structural schematic diagram of an apparatus having an oil tank according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0021] To facilitate understanding of the present application, the present application will be described more comprehensively below in conjunction with drawings and specific examples. The drawings show preferred embodiments of the present application. However, the present application may be realized in many different forms and is not limited to the embodiments described herein. Rather, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and complete.

[0022] Referring to FIG. 1, FIG. 1 shows an exploded view angle structure of an oil-proof assembly according to an embodiment of the present application.

[0023] As shown in FIG. 1, the oil-proof structure includes a valve body 1, a first filtering member 2, a stopper member 3, and an elastic member 4.

[0024] A cavity 11 is provided in the center of the valve body 1, penetrating both ends of the valve body 1. The valve body 1 includes a first end 1a and a second end 1b. An oil passage port 12 is provided at the first end 1a, connecting the cavity 11 to the outside. The cavity 11 is configured to connect to an external ventilation passage at the second end 1b.

[0025] The valve disc 1 may be made of metal or plastic, thereby ensuring the structural strength of the valve disc 1. The valve disc 1 may be attached to the oil tank housing by providing a mounting structure at the first end 1a or the second end 1b. For example, the first end 1a may have a thread on the outside for connecting and fixing to the oil tank housing. Of course, the valve disc 1 may also be fixed to the oil tank housing by providing a screw hole at the second end 1b; the specific fixing method is not limited in this application.

[0026] Here, the first end 1a of this valve body 1 may be used to attach to the housing of an oil tank or the inside of the housing, and oil, gas, oil mist or liquid oil inside the oil tank can enter the cavity 11 of the valve body 1 through the oil passage 12 installed at the first end 1a of this valve body 1, or can re-enter the oil tank from the cavity 11 through this oil passage 12.

[0027] The second end 1b of the valve body 1 may be installed on the housing of the oil tank or outside the housing. The cavity 11 may be used to connect the second end 1b of the valve body 1 to an external ventilation passage, thereby communicating the gas inside the oil tank with the external ventilation passage through the cavity 11. Specifically, the valve body 1 may have an opening at the second end 1b, and the cavity 11 may communicate with the outside through the opening, thereby ensuring that the inside of the oil tank housing is ventilated with the outside through the cavity 11 of the valve body 1.

[0028] The first filter member 2 is installed in the cavity 11 of the first end 1a. Specifically, the diameter of the first filter member 2 matches the diameter of the cavity 11, so that it can absorb oil, gas, oil mist, or liquid oil that has entered the cavity 11 through the oil passage port 12, so that the gas discharged from the ventilation passage is substantially free of oil, gas, oil mist, or liquid oil, thereby achieving an oil-proof effect.

[0029] In some embodiments, the first filter element 2 may be made of an oil-absorbing material, such as sponge, fiber, or other single or composite material. To improve its adsorption effect against oil, gas, oil mist, or liquid oil, the first filter element 2 may have a filtering structure formed by stacking multiple filter elements made of oil-absorbing material. The oil, gas, oil mist, or liquid oil in the gas contacts the outermost filter element first, and the first filter element 2 absorbs it in a layered, sequentially saturated manner, thereby achieving a more uniform absorption effect. Furthermore, the layered filtering structure significantly increases the contact area between the filter elements and the material to be filtered, and also increases the adsorption area for oil, gas, oil mist, or liquid oil. The stacked configuration of the first filter element 2 can improve the flow of fluid between layers, forming channels or vortices, which favors sufficient contact between the fluid and the first filter element 2 and improves adsorption efficiency.

[0030] Furthermore, an adsorbent for oil / gas, oil mist, or liquid oil can be added to the first filter element 2 to improve the adsorption effect, and a layered filter structure can be used to more uniformly distribute the adsorbent throughout the filter block. As fluid flows between the layers, each portion of the adsorbent can fully exert its adsorption effect, avoiding the situation where the adsorbent is locally overused or underused, thereby improving the utilization rate of the adsorbent throughout the filter block. It is understood that the adsorbent may be any conventional adsorbent for oil / gas, oil mist, or liquid oil, and this application does not provide any examples thereof.

[0031] Filtration blocks that adsorb throughout the block have difficulty in combining and optimizing different adsorbents. Often, only a single type of adsorbent can be used, making it difficult to achieve high-efficiency simultaneous adsorption of multiple substances with different properties. In one embodiment, adsorbents of different types or performance can be placed in different layers to meet different adsorption needs. For example, an adsorbent with good adsorption effect for large particles can be placed in the first layer, and an adsorbent with high selectivity for specific chemical components can be placed in the second layer. This combination method allows for more targeted and efficient adsorption of complex mixtures of substances, improving the overall adsorption performance of the filtration block.

[0032] The stopper member 3 is provided in the cavity 11 of the second end 1b, and a ventilation through-hole 31 is provided in the stopper member 3. The elastic member 4 is provided between the first filtering member 2 and the stopper member 3, and is configured so that after the first filtering member 2 absorbs oil and expands, the elastic member 4 applies a thrust to the filtering member, thereby pushing out at least a portion of the oil absorbed in the first filtering member 2 by the thrust of the elastic member 4. In one embodiment, the elastic member 4 may be a spring or a material having an elastic deformation function, such as rubber, and the present application is not limited thereto.

[0033] Here, the stopper member 3 abuts against the cavity wall of the cavity 11 and restricts the elastic member 4 within a certain space between the first filtering member 2 and the stopper member 3. When the first filtering member 2 is in a state where it has not absorbed oil, the elastic member 4 may be set in a pre-compressed state or in an uncompressed state. After the first filtering member 2 absorbs oil and expands, its volume increases by absorbing oil-gas, oil mist, or liquid oil. At this time, the expanded first filtering member 2 presses against the elastic member 4, and the elastic member 4 also applies a certain thrust to the first filtering member 2.

[0034] When the oil in the first filtering member 2 is not saturated and the thrust that the elastic member 4 exerts on the first filtering member 2 is smaller than a preset value, the thrust of the elastic member 4 on the first filtering member 2 is insufficient to offset the thrust that the expansion of the first filtering member 2 exerts on the elastic member 4. At this time, the oil in the first filtering member 2 cannot be pushed out by the elastic member 4, and the first filtering member 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 filtering member 2 continues to increase.

[0035] When the oil in the first filtering member 2 is saturated to a certain extent and the thrust exerted by the elastic member 4 on the first filtering member 2 is equal to or greater than a preset value, the thrust exerted by the compressed elastic member 4 on the first filtering member 2 is equal to or greater than the thrust exerted by the elastic member 4 due to the expansion of the first filtering member 2, and at this time the first filtering member 2 cannot absorb any more oil and expand, and the elastic member 4 pushes out at least some of the oil in the first filtering member 2. In some cases, the pushed-out oil may be returned to the oil tank via the oil passage 12.

[0036] This oil-proof assembly is equipped with an elastic member 4, which can apply a certain thrust to the first filtering member 2 when it reaches a certain degree of saturation, thereby pushing out excess oil from the first filtering member 2, preventing the first filtering member 2 from absorbing more oil and affecting its filtering and ventilation efficiency, and preventing the first filtering member 2 from becoming oversaturated, thereby ensuring the filtering and ventilation performance of the oil-proof assembly.

[0037] In one embodiment, this preset value may be set to 6-15 N. This preset value may be slightly lower than the thrust force on the elastic member 4 that is generated when the entire first filtering member 2 reaches a saturated state, so that the first filtering member 2 always remains unsaturated.

[0038] Of course, this preset value may also be set so that the oil in the first filtering member 2 is pushed out only when the thrust of the compressed elastic member 4 against the first filtering member 2 is greater than the thrust applied to the elastic member 4 by the expansion of the first filtering member 2. This preset value may be determined based on different filtering materials, and the elastic modulus of the elastic member 4 may be adjusted based on actual measurement results, so that when the first filtering member 2 reaches a certain saturation, the thrust exerted by the elastic member 4 can be greater than this preset value, and the elastic member 4 can smoothly push out the excess oil absorbed by the first filtering member 2.

[0039] 2 and 3, which show schematic cross-sectional views of a portion of an oil-proof structure according to an embodiment of the present application and another cross-sectional view.

[0040] As shown in FIGS. 2 and 3, this oil-proof structure further includes a first pressure plate 5 and a plurality of steps 13 in addition to the structure of FIG.

[0041] One side of the first pressure plate 5 abuts against the first filtering member 2, and the other side abuts against the step 13. A plurality of first vent holes 51 are formed in the first pressure plate 5, and the first vent holes 51 face the first filtering member 2. In addition, the step 13 forms an empty space between the oil passage port 12 and the first pressure plate 5.

[0042] The first pressure plate 5 abuts one side of the first filtering 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. The first vent holes 51 face the first filtering element 2, allowing oil, gas, oil mist, or liquid oil to enter the first filtering element 2 through the first vent holes 51, or allowing gas or oil in the first filtering element 2 to be discharged through the first vent holes 51, thereby improving the filtering performance of the oil-proof assembly. A step 13 forms an empty space between the oil passage opening 12 and the first pressure plate 5. Gas enters the empty space of the cavity 11 through the oil passage opening 12 and then enters the first filtering element 2 through the first vent holes 51, improving the ventilation performance of the oil-proof assembly. It should be understood that the number of first vent holes 51 may be multiple, and the specific number may be determined according to actual needs.

[0043] In one embodiment, guide grooves 14 are provided between the steps 13 and between the steps 13 and the cavity wall of the cavity 11, and the first vent holes 51 face the guide grooves 14. In addition to allowing gas to flow into the oil tank, the first vent holes 51 also allow oil pushed out by the elastic member 4 to flow out. The oil pushed out by the elastic member 4 flows into the guide grooves 14 through the first vent holes 51 and can then return to the oil tank through the oil passage 12. The design of the guide grooves 14 ensures a return flow of the pushed-out oil and prevents oil from accumulating in the cavity 11 and affecting its ventilation performance.

[0044] Furthermore, the oil passage port 12 is a strip-shaped port, and one end of the guide groove 14 faces the strip-shaped port. A slope 15 is provided between the guide groove 14 and the oil passage port 12. The oil passage port 12, which is provided in the strip-shaped port, prevents oil, gas, oil mist, or liquid oil from the oil tank from excessively entering the cavity 11 of the valve disc 1, thereby affecting the service life of the first filter element 2. The slope 15 provided between the guide groove 14 and the oil passage port 12 also allows the liquid oil in the guide groove 14 to be more efficiently discharged through the oil passage port 12, ensuring the filtering and ventilation performance of the oil-proof assembly and extending its service life. Of course, the shape of the oil passage port 12 is not limited to a strip-shaped one; it may be rectangular, triangular, circular, or other shapes, as long as it is effective in reducing the intrusion of oil, gas, oil mist, or liquid oil into the valve disc 1.

[0045] Referring to FIG. 4, the figure shows an exploded view angle structure of a part of the structure in the oil-proof assembly according to an embodiment of the present application.

[0046] 1-3 , the oil-proof assembly may further include a second pressure plate 6, a first sealing ring 52, and a second sealing ring 62. One side of the second pressure plate 6 abuts against the first filtering member 2, and the other side abuts against one end of the elastic member 4. The second pressure plate 6 has a plurality of second ventilation holes 61 that face the first filtering member 2. Similar to the first pressure plate 5, the second ventilation holes 61 of the second pressure plate 6 can guide gas within the first filtering member 2 to be discharged through the second ventilation holes 61, or gas at the second end can enter the first filtering member 2 through the second ventilation holes 61, thereby improving the filtering and breathability of the first filtering member 2.

[0047] In one embodiment, the second pressure plate 6 and the stopper member 3 are provided with a positioning structure for positioning the elastic member 4 in their central portions. The positioning structure allows the elastic member 4 to act on the central portion of the second pressure plate 6, which, in conjunction with the abutment of the second pressure plate 6 against the first filtering member 2, improves the uniformity of the thrust applied by the elastic member 4 to the first filtering member 2 via the second pressure plate 6, thereby improving the oil-pushing effect of the first filtering member 2. Furthermore, when the first pressure plate 5 is provided in the oil drainage assembly, one side of the first pressure plate 5 abuts the bottom of the first end, and the second pressure plate 6 abuts against the elastic member 4. Therefore, when the elastic member 4 applies a thrust to the second pressure plate 6, the first filtering member 2 simultaneously receives the forces of the first pressure plate 5 and the second pressure plate 6, thereby effectively draining excess oil from the first filtering member 2.

[0048] In another embodiment, a first sealing ring 52 may be provided around the periphery of the first pressure plate 5, and the first pressure plate 5 abuts and seals against the cavity wall of the cavity 11 via the first sealing ring 52. Because of manufacturing errors, gaps are unavoidable between the first pressure plate 5 and the cavity wall of the cavity 11, and between the first filtering element 2 and the cavity wall of the cavity 11. The first sealing ring 52 prevents oil, gas, oil mist, or liquid oil from directly passing through and discharging the gaps between the first pressure plate 5 and the cavity wall of the cavity 11, and between the first filtering element 2 and the cavity wall of the cavity 11, thereby improving the filtering effect on gas entering the valve disc 1. Furthermore, if a waterproof, breathable membrane 8 is provided at the second end of the valve disc 1, the installation of the first sealing ring 52 can also extend the service life of the waterproof, breathable membrane 8, thereby improving the service life of the entire oil-proof, breathable valve.

[0049] In yet another embodiment, when the oil-proof assembly is provided with a second pressure plate 6, a second sealing ring 62 is provided around the periphery of the second pressure plate 6, and the second pressure plate 6 abuts and seals against the cavity wall of the cavity 11 via the second sealing ring 62. The function of the second sealing ring 62 can be referenced to that of the first sealing ring 52, and is used to extend the service life of the entire oil-proof vent valve. Of course, in actual applications, a sealing ring may be provided only on the first pressure plate 5 or the second pressure plate 6, or both on the first pressure plate 5 and the second pressure plate 6, and this can be determined according to actual needs.

[0050] 5 and 6, the drawings show the overall cross-sectional structure of the oil-proof structure according to the embodiment of the present application and another exploded view angle structure.

[0051] As shown in FIGS. 5 and 6, this oil-proof structure includes a valve body 1, a first filtering member 2, a stopper member 3, and an elastic member 4.

[0052] A cavity 11 is provided in the center of the valve disc 1, penetrating both ends of the valve disc 1. The valve disc 1 includes a first end and a second end, and an oil passage port 12 connecting the cavity 11 to the outside is provided at the first end, and the cavity 11 is configured to connect to an external ventilation passage at the second end. The first filtering member 2, elastic member 4, and stopper member 3 are all installed in this order within the cavity 11. Here, the elastic member 4 is configured so that after the first filtering member 2 absorbs oil and expands, the elastic member 4 applies a thrust to the filtering member, thereby pushing out at least a portion of the oil absorbed in the first filtering member 2 by the thrust of the elastic member 4.

[0053] Specifically, the oil-proof structure further includes a first pressure plate 5 and a second pressure plate 6. The first pressure plate 5 abuts against the cavity wall of the cavity 11 via a first seal ring 52, and the second pressure plate 6 abuts against the cavity wall of the cavity 11 via a second seal ring 62. When the first filtering member 2 absorbs oil and expands to a certain degree of saturation, and the thrust of the elastic member 4 on the first filtering member 2 via the second pressure plate 6 reaches a predetermined value, the excess oil in the first filtering member 2 is forced out and flows out through the first vent hole 51 and the oil passage hole 12 in the first pressure plate 5, thereby preventing the first filtering member 2 from becoming oversaturated and ensuring the filtering and breathability of the first filtering member 2 in this oil-proof assembly. Furthermore, a first seal ring 52 may be fitted around the periphery of the first pressure plate 5, and a second seal ring 62 may be fitted around the periphery of the second pressure plate 6, and the first seal ring 52 and the second seal ring 62 function to improve the filtering effect. Of course, either or both of the first seal ring 52 and the second seal ring 62 may be used as needed.

[0054] In this embodiment, to improve the reliability of the oil-protection assembly's ventilation function, the oil-protection assembly further includes a second filter member 7 and a waterproof, breathable membrane 8. This waterproof, breathable membrane 8 is disposed within the second end cavity 11 and is located between the stopper member 3 and the ventilation passage. This waterproof, breathable membrane 8 may be made of e-PTFE or other membrane material that is both waterproof and breathable. The provision of the waterproof, breathable membrane 8 prevents external dust or water vapor from entering the valve body 1 and affecting the oil absorption performance of the filter member, while still ensuring oil-protection.

[0055] The second filter member 7 is disposed between the stopper member 3 and the external ventilation passage, and between the stopper member 3 and the waterproof, breathable membrane 8. The second filter member 7 can further filter and absorb oil, gas, oil mist, or liquid oil in the gas filtered by the first filter member 2, thereby ensuring an oil-proof effect and preventing the oil, gas, oil mist, or liquid oil from affecting the waterproof, breathable membrane 8, thereby extending the service life of the waterproof, breathable membrane 8.

[0056] In one embodiment, the diameter of the stopper member 3 on the side closer to the second filtering member 7 is larger than the diameter of the side closer to the first filtering member 2, and the diameter of the second filtering member 7 is larger than the diameter of the first filtering member 2. The design of the stopper member 3 allows oil / gas, oil mist, or liquid oil remaining after filtering by the first filtering member 2 to come into contact with the second filtering member 7 as much as possible, preventing the second filtering member 7 from leaking out through the gap between the second filtering member 7 and the cavity wall of the cavity 11, which would affect the oil-proofing effect. In addition, the through holes 31 in the stopper member 3 may both face the second filtering member 7, thereby improving the filtering effect of the second filtering member 7 against oil / gas, oil mist, and liquid oil.

[0057] Similarly, the diameter of the second filtering member 7 is also larger than that of the first filtering member 2, thereby further improving the filtering effect of the second filtering member 7. It can be understood that the diameter between the first filtering member 2 and the second filtering member 7 can be determined according to actual needs, and the present application does not limit the same.

[0058] In order to further improve the service life of the waterproof breathable membrane 8, a partition plate 9 is provided between the waterproof breathable membrane 8 and the second filtering member 7. One side of the partition plate 9 abuts the second filtering member 7 and the other side abuts one side of the waterproof breathable membrane 8. The partition plate 9 has a plurality of third ventilation holes that face the second filtering member 7. The partition plate 9 separates the waterproof breathable membrane 8 and the second filtering member 7, preventing oil absorbed by the second filtering member 7 from contaminating the waterproof breathable membrane 8. Furthermore, the third ventilation holes in the partition plate 9 may be set to have a relatively large ratio of holes, thereby minimizing the effect of the third ventilation holes on the breathability.

[0059] A protective cover 10 is further provided on the outside of the second end of this valve body 1, and the protective cover 10 forms a waterproof, breathable membrane 8 inside the valve body 1 and is used to prevent external dust and earth and sand from entering the inside of the valve body 1, thereby improving the service life of the waterproof, breathable membrane 8 and other internal structures. A gap or groove may be left between this protective cover 10 and the valve body 1, thereby forming a ventilation passage between the protective cover 10 and the valve body 1, and this ventilation passage can provide the oil-proof structure with an oil-proof and breathable effect.

[0060] At the same time, the first filter member 2 and the second filter member 7 each adopt a filtering structure formed by stacking multiple filter elements. The filtering structure formed by stacking can improve filtering performance. Of course, the first filter member 2 and the second filter member 7 may adopt a single filtering material or may be determined according to actual needs, and this application is not limited thereto.

[0061] An external thread and mounting seal 16 may be further installed on the outside of this valve body 1, which can ensure a tight seal between the valve body 1 and the oil tank when the valve body 1 is installed in the oil tank, and is convenient for installation, removal, and use.

[0062] With the above design, substances such as oil, gas, or oil mist-carrying gas, liquid oil, etc. in the oil tank enter the cavity 11 through the oil passage hole of the valve body 1, and are subsequently filtered secondarily by the first filter member 2 and the second filter member 7, thereby achieving the oil-proof function. At the same time, the installed waterproof and breathable membrane 8 can cooperate with the first filter member 2 and the second filter member 7 to achieve the ventilation function of the oil-proof assembly.

[0063] When operating, if the oil in the first filtering member 2 is not saturated and the thrust exerted by the elastic member 4 on the first filtering member 2 is less than a preset value, the thrust of the elastic member 4 on the first filtering member 2 is insufficient to offset the thrust exerted by the expansion of the first filtering member 2 on the elastic member 4, so that the oil in the first filtering member 2 cannot be pushed out by the elastic member 4, and the first filtering member 2 continues to absorb oil / gas, oil mist, or liquid oil, so that the elastic member 4 continues to be further compressed, and the thrust of the elastic member 4 on the first filtering member 2 continues to increase. If the oil in the first filtering member 2 is saturated to a certain extent and the thrust exerted by the elastic member 4 on the first filtering member 2 is equal to or greater than a preset value, the thrust exerted by the compressed elastic member 4 on the first filtering member 2 exceeds the thrust exerted by the expansion of the first filtering member 2 on the elastic member 4, so that the first filtering member 2 cannot absorb any more oil and expand, and the elastic member 4 pushes out at least some of the oil in the first filtering member 2. Optionally, the forced oil may be returned to the oil tank via the oil passage 12.

[0064] As can be seen from the above, the design of the oil protection assembly can avoid the problem of the first filtering element 2 becoming too saturated, which would affect its filtering and ventilation performance, and at the same time meets the oil protection and ventilation needs of the equipment, eliminating the need for frequent maintenance. This can reduce the maintenance costs of the equipment including this oil protection assembly, oil protection and vent valve, and oil tank, and extend its service life.

[0065] Referring to FIG. 7, the figure shows the structure of an oil-proof and venting valve according to an embodiment of the present application.

[0066] As shown in Figure 7, this oil-proof and venting valve includes an oil-proof assembly 20 and a protective cover 10. The protective cover 10 is installed on the second end of the valve body of the oil-proof assembly 20, and a ventilation passage is provided between the protective cover 10 and the valve body. The protective cover 10 forms a waterproof and breathable membrane inside the valve body to prevent external dust and soil from entering the inside of the valve body, thereby improving the service life of the internal structure of the valve body. A gap or groove may be left between the protective cover 10 and the valve body, thereby forming a ventilation passage between the protective cover 10 and the valve body, and this ventilation passage provides the oil-proof structure with an oil-proof and breathable effect.

[0067] The oil protection assembly 20 may include a valve body, a first filtering member, a stopper member, and an elastic member. After the first filtering member is expanded to a certain extent, the elastic member can automatically push out excess oil in the first filtering member, and the oil can be returned through the oil passage port of the valve body. This avoids the problem of the first filtering member becoming too saturated, which affects its filtering and ventilation performance. It does not require frequent maintenance, reduces the maintenance cost of the oil protection and vent valve, and extends its service life.

[0068] In addition, this oil-proof and venting valve may further include a male thread 17 and a mounting seal 16, which can ensure a tight seal between the valve body and the oil tank when the valve body is installed in the oil tank, and also facilitate installation, removal, and use. Of course, this oil-proof and venting valve may further include other structures, and no further limitations are imposed here.

[0069] For the specific structure of the oil-proof assembly 20, please refer to the description in any of the embodiments of FIGS. 1-6, and the present application will not further describe the specific structure of the oil-proof assembly 20.

[0070] Referring to FIG. 8, the figure shows the structure of a device with an oil tank according to an embodiment of the present application.

[0071] Here, the device with an oil tank 100 may include an oil tank and an oil-proof vent valve 200, and the device with an oil tank 100 may be a gearbox, for example, an oil tank for an automobile reducer, transmission, or three-in-one oil-cooled motor, or may even be an oil tank filled with other oil-based liquids, and the present application does not limit the type of the oil tank and the oil-based liquid contained therein.

[0072] In addition, the device 100 with an oil tank may further include gears, racks, or other mechanical mechanisms for oil-based liquids that use the oil tank, and the specific mechanical structure type is not limited. Of course, the device 100 with an oil tank may be an automobile, a ship, or other device 100 with an oil tank and its power system.

[0073] This oil-proof and venting valve 200 can refer to the description of the oil-proof assembly and the oil-proof and venting valve 200 constituted by it in any of the embodiments shown in Figures 1-7, and includes components such as the valve 200 body, the first filter member, the stopper member, and the elastic member, and the effect of oil-proof and venting is achieved by the oil-proof assembly, and the specifics are not limited here.

[0074] After adopting the oil-proof and venting valve 200 in the embodiment of the present application, the apparatus 100 with an oil tank can also achieve the technical effects of reducing maintenance and cutting maintenance costs, and improving oil-proof and venting properties. In addition, the oil-proof and venting valve 200 can further utilize its oil-proof and venting properties to reduce the risk of equipment disassembly, thereby improving the reliability of the apparatus 100.

[0075] It should be understood that when an element is referred to as "fixed to" another element, it may be directly connected to the other element, or there may be intervening elements. When an element is referred to as "connected" to another element, it may be directly connected to the other element, or there may also be intervening elements.

[0076] It should be understood that the orientations or positional relationships indicated by the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. are orientations or positional relationships shown based on the drawings, and are merely for the convenience and simplification of the description of this application, and do not indicate or imply that the referred-to devices or elements must have a particular orientation or be configured and operated in a particular orientation, and therefore should not be understood as limitations on this application.

[0077] It should be noted that the terms "first" and "second" are merely descriptive and should not be understood as indicating or implying the relative importance or the number of the technical features indicated. A feature qualified by "first" or "second" may thereby explicitly or implicitly include one or more of said features. In the description of this application, unless otherwise expressly and specifically limited, "plurality" means two or more.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0079] The above content is merely an example and description of the structure of the present application, and although the description is more specific and detailed, it should not be understood as limiting the patent scope of the present application. It should be noted that those skilled in the art can make some modifications and improvements without departing from the concept of the present application, and all of these obvious alternatives belong to the protection scope of the present application.

Claims

1. An oil protection assembly, the oil protection assembly comprising: a valve element having a cavity formed in a central portion thereof and penetrating both ends of the valve element, the valve element including a first end and a second end, the first end being provided with an oil passage port communicating the cavity with the outside, and the second end being configured so that the cavity communicates with an external ventilation passage; a first filter member disposed within the cavity at the first end; a stopper member provided in the cavity at the second end, the stopper member having a through hole for ventilation; an elastic member provided between the first filtering member and the stopper member, wherein the elastic member is configured such that after the first filtering member absorbs oil and expands, at least a portion of the oil absorbed in the first filtering member is pushed out by the thrust of the elastic member.

2. The oil protection assembly comprises: a first pressure plate, one side of which is in contact with the first filter member, the first pressure plate having a plurality of first vent holes formed therein, the first vent holes facing the first filter member; 2. The oil-proof assembly according to claim 1, further comprising a plurality of steps abutting against the other side of the first pressure plate and forming an empty space between the oil passage port and the first pressure plate.

3. 3. The oil-proof assembly according to claim 2, wherein a guide groove is provided between the steps and between the steps and a cavity wall of the cavity, and the first vent hole faces the guide groove.

4. 4. The oil-proof assembly according to claim 3, wherein the oil passage opening is a belt-like opening, one end of the guide groove faces the belt-like opening, and a slope is provided between the guide groove and the oil passage opening.

5. 3. The oil-proof assembly according to claim 2, wherein a first seal ring is provided on a peripheral edge of the first pressure plate, and the first pressure plate abuts against the cavity wall of the cavity via the first seal ring to be sealed.

6. The oil protection assembly comprises: a second pressure plate having one side contacting the first filter member and the other side contacting one end of the elastic member, the second pressure plate having a plurality of second vent holes formed therein, the second vent holes facing the first filter member; 2. The oil-proof assembly according to claim 1, wherein the second pressure plate and the stopper member are provided with a positioning structure at the center for positioning the elastic member.

7. 7. The oil-proof assembly according to claim 6, wherein a second seal ring is provided on the periphery of the second pressure plate, and the second pressure plate abuts against the cavity wall of the cavity via the second seal ring to be sealed.

8. The oil protection assembly comprises:

2. The oil-proof assembly according to claim 1, further comprising a waterproof, breathable membrane disposed within the cavity at the second end and positioned between the stopper member and the ventilation passage.

9. The oil protection assembly comprises:

2. The oil protection assembly according to claim 1, further comprising a second filter member disposed between the stopper member and the ventilation passage.

10. The oil protection assembly comprises: a waterproof air-permeable membrane provided in the cavity at the second end and positioned between the stopper member and the ventilation passage; 10. The oil-proof assembly according to claim 9, further comprising a partition plate having one side abutting the second filtering member and the other side abutting one side of the waterproof breathable membrane, wherein the partition plate has a plurality of third ventilation holes formed therein, the third ventilation holes facing the second filtering member.

11. 9. An oil protection assembly according to claim 8, wherein the diameter of the stopper member on the side closer to the second filter member is larger than the diameter of the side closer to the first filter member, and the diameter of the second filter member is larger than the diameter of the first filter member.

12. 2. The oil protection assembly according to claim 1, wherein the first filtering member has a filtering structure formed by stacking a plurality of filter elements.

13. The elastic member is When the first filter member has not absorbed oil or has absorbed oil and expanded, and when the thrust force applied by the elastic member to the first filter member is smaller than a preset value, the oil in the first filter member is not pushed out by the elastic member, 2. The oil-proof assembly according to claim 1, wherein after the first filtering member has absorbed oil and expanded, and when a thrust force applied by the elastic member to the first filtering member is equal to or greater than a predetermined value, at least a portion of the oil in the first filtering member is pushed out by the elastic member.

14. An oil-proof and venting valve, the oil-proof and venting valve comprising: an oil-proof assembly; a protective cover provided on the second end of the valve body of the oil protection assembly, wherein a ventilation passage is provided between the protective cover and the valve body; An oil-proof vent valve, characterized in that the oil-proof assembly is an oil-proof assembly according to any one of claims 1 to 13.

15. 1. An apparatus having an oil tank, the apparatus comprising: Oil tank and and an oil vent valve attached to the oil tank, wherein the oil vent valve is the oil vent valve according to claim 14.

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