Filter, filtering device, gearbox and vehicle

Abstract

The utility model relates to the technical field of filtering devices, in particular to a filter, a filtering device, a gearbox and a vehicle. In the filter, a filtering layer is arranged at the first inlet and is used for filtering impurities in liquid flowing into the cavity from the first inlet; the on-off bypass valve is arranged at the second inlet; the adsorption part is arranged at the second inlet and at least used for adsorbing impurities in liquid flowing through the bypass valve from the second inlet and flowing into the cavity. The arrangement of the second inlet can realize short-time communication in special states such as flow reduction at the first inlet so as to effectively ensure the flow of the filter, the adsorption piece can realize impurity adsorption without influencing the liquid flow, a filter screen arranged at the second inlet can be saved, and the cost of the filter can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of filtration device technology, and in particular to a filter, filtration device, gearbox, and vehicle. Background Technology

[0002] A filter is a device that filters impurities from a liquid. During operation, impurities can become trapped on the filter layer, causing the filtration speed to slow down over time. This can significantly impact the normal operation of devices equipped with filters, such as gearboxes. Therefore, in addition to the conventional filtration channels, filters also include bypass channels to ensure liquid flow even if these channels become clogged. In related technologies, the cost of filters with bypass channels needs to be optimized. Utility Model Content

[0003] This utility model provides a filter, a filtering device, a transmission, and a vehicle to solve the technical problem that filters with bypass passages in the prior art are costly.

[0004] In a first aspect, embodiments of the present invention provide a filter having a cavity, the cavity having a first inlet and a second inlet; the filter includes:

[0005] A filter layer, disposed at the first inlet, is used to filter impurities in the liquid flowing into the cavity from the first inlet;

[0006] A switchable bypass valve is located at the second inlet;

[0007] An adsorption element, disposed at the second inlet, is used at least to adsorb impurities in the liquid flowing from the second inlet through the bypass valve into the cavity.

[0008] In some embodiments, the filter further includes:

[0009] A first cover is provided at the second inlet, and the bypass valve is provided on the first cover;

[0010] A fixed cover is disposed on the side of the first cover body opposite to the cavity, and the fixed cover is fixedly connected to the first cover body;

[0011] The adsorption element is disposed between the first cover and the fixed cover.

[0012] In some embodiments, the adsorption member and at least one of the first cover and the fixed cover surround a portion of the second inlet.

[0013] In some embodiments, the end wall of the first cover is provided with a plurality of ribs, the ribs are spaced apart from each other, and the ribs are in contact with the surface of the adsorption member facing the end wall;

[0014] The gaps between the first cover and the adsorption member, and between two adjacent ribs, are made

[0015] This refers to at least a portion of the second entry point.

[0016] In some embodiments, the ribs extend circumferentially along the first cover, and / or, a plurality of the ribs are spaced apart circumferentially on the first cover.

[0017] In some embodiments, a plurality of the raised ribs spaced apart in the circumferential direction of the first cover body form a rib group; the rib group includes a plurality of rib groups, which are arranged at intervals in the radial direction of the first cover body.

[0018] In some embodiments, the fixed cover is provided with a placement groove, the bottom of the placement groove is provided with a plurality of openings, the openings passing through the fixed cover along the axial direction of the filter; the adsorption element is disposed in the placement groove, the adsorption element is provided with a through hole, the through hole faces the bypass valve and communicates with the opening;

[0019] The opening structure is part of the second inlet, and the through hole structure is part of the second inlet.

[0020] In some embodiments, the opening includes a first opening located at the center of the bottom of the tank along the axial direction of the filter. The first opening, the through hole, and the bypass valve are arranged sequentially. The diameter of the first opening is larger than the diameter of the through hole, so that a portion of the adsorption element is exposed through the first opening; and / or, the diameter of the through hole is larger than the diameter of the valve inlet of the bypass valve.

[0021] In some embodiments, the bottom of the placement groove is provided with an abutment protrusion, which contacts the surface of the adsorption member facing the bottom of the groove, and the gap between the bottom of the groove and the adsorption member is constructed as part of the second inlet.

[0022] In some embodiments, the opening further includes a plurality of second openings that communicate the gap between the adsorption element and the bottom of the tank.

[0023] In some embodiments, the second opening extends circumferentially along the fixed cover, a plurality of the second openings are spaced apart circumferentially on the fixed cover, and the bottom of the groove between two adjacent second openings is provided with the abutting protrusion.

[0024] In some embodiments, a gap is formed between the sidewall of the placement groove and the radially outer side of the adsorption member, and the gap between the sidewall of the placement groove and the radially outer side of the adsorption member is configured as part of the second inlet.

[0025] In some embodiments, the adsorption element includes at least one of a magnet, activated carbon, and silica gel.

[0026] Secondly, this utility model embodiment also provides a filtering device, which includes a housing and a filter as described above, wherein the housing is provided with a receiving cavity and the filter is disposed in the receiving cavity.

[0027] In some embodiments, the accommodating cavity has an inlet and an outlet; the cavity also has a filter outlet, the filter outlet being connected to the outlet, and the first inlet and the second inlet being connected to the inlet respectively.

[0028] In some embodiments, the filter layer, the bypass valve, and the adsorption element are all spaced apart from the cavity wall of the accommodating cavity.

[0029] In some embodiments, the accommodating cavity has a cavity opening, and the filtering device further includes a third cover that seals the cavity opening. The third cover has a limiting rib; the limiting rib abuts against one end of the filter, and the other end of the filter abuts against the cavity wall of the accommodating cavity.

[0030] In some embodiments, the end of the third cover is provided with a sludge storage groove that is recessed away from the filter.

[0031] Thirdly, this utility model embodiment also provides a gearbox, the gearbox including the filtering device as described above, and the gearbox housing is the housing of the filtering device.

[0032] Fourthly, embodiments of the present invention also provide a vehicle, the vehicle including the filter as described above; and / or including the filtering device as described above; and / or including the gearbox as described above.

[0033] Compared with prior art, the present invention has the following advantages:

[0034] In this embodiment of the filter, the first inlet of the cavity is a conventional filtration channel. During normal use, liquid passes through the filter layer at the first inlet and enters the cavity. Impurities in the liquid are trapped on the filter layer, causing the filtration speed to slow down and the pressure difference between the liquid outside the filter and the liquid inside the cavity to increase. When the pressure difference reaches the threshold for the bypass valve to open, the bypass valve opens, and the liquid flows through the adsorbent at the second inlet and the bypass valve into the cavity, ensuring the filter's flow rate even when the first inlet is blocked. The second inlet allows for short-term connection under special conditions such as a decrease in flow rate at the first inlet, effectively maintaining the filter's flow rate. The adsorbent adsorbs impurities without affecting the liquid flow rate and eliminates the need for a filter screen at the second inlet, reducing the filter's cost.

[0035] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0037] Figure 1 This is a schematic diagram of the filter structure in an embodiment of this application;

[0038] Figure 2 yes Figure 1 Enlarged view of section A;

[0039] Figure 3 This is an exploded view of a portion of the filter structure in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the structure of the fixed cover in an embodiment of this application;

[0041] Figure 5 yes Figure 4 A structural schematic diagram of the BB cross-section;

[0042] Figure 6 This is a schematic diagram of the structure of the third cover in the embodiments of this application;

[0043] Figure 7 This is a structural schematic diagram of the third cover section view in the embodiments of this application;

[0044] Figure 8 This is a schematic diagram of the gearbox structure in an embodiment of this application;

[0045] Figure 9 This is a structural schematic diagram of a cross-sectional view of the filter in the gearbox in an embodiment of this application.

[0046] Figure label:

[0047] 1. Filter;

[0048] 11. First cover; 111. End wall; 112. Rib; 113. Snap-fit ​​part; 114. Snap-fit ​​protrusion; 12. Fixing cover; 121. Installation groove; 122. Opening; 123. First opening; 124. Second opening; 125. Abutment protrusion; 126. Snap-fit ​​groove; 127. Groove bottom; 13. Filter layer; 14. Second cover; 141. Filter outlet; 15. First O-ring; 16. Cavity; 17. First inlet; 18. Second inlet;

[0049] 20. Bypass valve; 21. Valve inlet; 22. Valve stem; 23. Spring; 24. Valve chamber;

[0050] 30. Adsorption element; 31. Through hole;

[0051] 40. Shell; 41. Receiving cavity; 42. Liquid outlet; 43. Liquid inlet; 44. Cavity opening;

[0052] 50. Third cover; 51. Sewage storage tank; 52. Limiting rib; 54. Second O-ring; 55. Cover skirt;

[0053] 61. Anti-loosening bolts. Detailed Implementation

[0054] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0055] Reference Figures 1 to 5 As shown, this application embodiment provides a filter 1, which has a cavity 16, a first inlet 17 and a second inlet 18. The filter 1 includes a filter layer 13, a bypass valve 20 that can be switched on and off, and an adsorption element 30. The filter layer 13 is disposed at the first inlet 17 and is used to filter impurities in the liquid flowing into the cavity 16 from the first inlet 17. The bypass valve 20 is disposed at the second inlet 18. The adsorption element 30 is disposed at the second inlet 18 and is used to adsorb impurities in the liquid flowing into the cavity 16 from the second inlet 18 through the bypass valve 20.

[0056] In this embodiment, the bypass valve 20 does not require any external power and opens when the pressure reaches the opening threshold. That is, when the filter 1 is in use, the bypass valve 20 opens when the pressure difference between the liquid pressure outside the filter 1 and the liquid pressure inside the cavity 16 reaches the opening threshold.

[0057] In this embodiment of the filter 1, the first inlet 17 of the cavity 16 is a conventional filtration channel. During normal use, liquid passes through the filter layer 13 located at the first inlet 17 and enters the cavity 16. Impurities in the liquid are trapped on the filter layer 13, causing the filtration speed of the filter 1 to gradually decrease, and increasing the pressure difference between the liquid pressure outside the filter 1 and the liquid pressure inside the cavity 16. When the pressure difference reaches the opening threshold of the bypass valve 20, the bypass valve 20 opens, and the liquid flows through the adsorption element 30 located at the second inlet 18 and the bypass valve 20 before entering the cavity 16. This ensures the flow rate of the filter 1 even when the first inlet 17 is blocked.

[0058] It is understandable that the second inlet 18 is a short-term connection under special conditions such as when the flow rate at the first inlet 17 drops, so as to effectively ensure the flow rate of the filter 1. The adsorption element 30 can adsorb impurities without affecting the liquid flow rate, and can save the need to install a filter screen at the second inlet 18, thereby reducing the cost of the filter 1.

[0059] In related technologies, an adsorption element is installed at the first inlet to delay filter clogging. Simultaneously, to ensure that liquid can enter through the second inlet when the flow rate decreases due to clogging at the first inlet, thus guaranteeing the required flow rate, a filter screen is installed at the second inlet to filter the liquid entering through it. However, on the one hand, the filter screen at the second inlet will still clog after prolonged operation, leading to insufficient flow or the need for premature filter replacement. On the other hand, since liquid only enters through the second inlet under specific operating conditions, its operating time over its entire lifespan is not long, making this setup uneconomical.

[0060] In this embodiment, the adsorption element 30 is disposed at the second inlet 18. Since the first inlet 17 and the second inlet 18 are connected, liquid entering from the outside can have impurities adsorbed by the adsorption element 30 and can then enter the cavity 16 through the first inlet 17, the second inlet 18, or both simultaneously. In other words, regardless of whether the liquid enters the cavity 16 through the first inlet 17 or the second inlet 18, impurities can be filtered by the adsorption element 30, ensuring the cleanliness of the liquid within the cavity 16. This application uses an adsorption element instead of a filter screen at the second inlet, effectively reducing the operating cost of the filter 1 by saving on component placement and extending the filter's lifespan.

[0061] In some embodiments, the bypass valve 20 includes a valve stem 22 and a spring 23. A valve inlet 21 is provided on the end wall 111 of the first cover 11, and a valve cavity 24 is provided on the side of the end wall 111 opposite to the adsorption member 30. The valve inlet 21 and the valve cavity 24 are selectively connected, and a valve outlet is provided on the side of the valve cavity 24 opposite to the valve inlet 21. The valve stem 22 is disposed within the valve cavity 24. One end of the spring 23 abuts against the valve stem 22, and the other end abuts against the first cover 11. The spring 23 provides a force to the valve stem 22 to block the valve inlet 21. When the bypass valve 20 is in use, the pressure at the valve inlet 21 exceeds the elastic force of the spring 23 (it is understood that, depending on the orientation of the filter 1, the pressure at the valve inlet 21 may also exceed the elastic force of the spring 23, the weight of the valve stem 22, or other forces before opening; this can be referred to in the prior art, and will not be elaborated upon in this embodiment). The liquid then pushes the valve stem 22 into the valve chamber 24, causing the valve inlet 21 to open. The liquid then flows sequentially through the valve inlet 21, the valve chamber 24, and the valve outlet into the cavity 16 within the filter 1. In this embodiment, integrating the first cover 11 and the bypass valve 20 makes the structure of the filter 1 more compact. The value that causes the bypass valve 20 to open is the force required to deform the spring 23 and move the valve stem 22.

[0062] In some embodiments, filter 1 includes a filter element, which serves as a filter layer 13.

[0063] In some embodiments, the filter 1 further includes a first cover 11 and a fixed cover 12. The first cover 11 is disposed at the second inlet 18 and a bypass valve 20 is provided on the first cover 11. The fixed cover 12 is disposed on the side of the first cover 11 away from the cavity 16 and is fixedly connected to the first cover 11. The adsorption member 30 is disposed between the first cover 11 and the fixed cover 12.

[0064] In this embodiment, a first cover 11 is disposed at one end of the filter 1 to protect that end. The first cover 11 has an end wall 111 and a side wall surrounding the outer periphery of the end wall 111. A gap exists between the side wall of the first cover 11 and the filter layer 13, allowing liquid to enter and increasing the filtration area of ​​the filter 1. The use of the first cover 11 and the fixing cover 12 to jointly fix the adsorption member 30 provides a reliable fixation.

[0065] In some embodiments, the adsorption member 30 and at least one of the first cover 11 and the fixed cover 12 surround a portion of the second inlet 18. Thus, when liquid flows in from the second inlet 18, the liquid flows through the adsorption member 30, causing the adsorption member 30 to adsorb impurities in the liquid flowing into the cavity 16 through the bypass valve 20, thereby ensuring the filtration effect of the filter 1 while maintaining the flow rate of the filter 1.

[0066] In some embodiments, the end wall 111 of the first cover 11 is provided with a plurality of ribs 112, the ribs 112 are spaced apart from each other, and the ribs 112 are in contact with the surface of the adsorption member 30 facing the end wall 111; the gap between the first cover 11 and the adsorption member 30, and between two adjacent ribs 112, serves as at least part of the second inlet 18.

[0067] In this embodiment, the adsorption member 30 is disposed between the first cover 11 and the fixed cover 12, and there is a gap between the surface of the end wall 111 and the fixed cover 12.

[0068] When the filter 1 is in use, the liquid flows through the gap between the first cover 11 and the adsorption element 30, and the gap between two adjacent ribs 112, to the bypass valve 20, and then enters the cavity 16 through the bypass valve 20. During the liquid flow, the adsorption element 30 adsorbs impurities in the liquid. The liquid is in direct contact with the adsorption element 30, and the filter 1 also has the advantage of good impurity adsorption effect.

[0069] In some embodiments, the rib 112 extends circumferentially along the first cover 11 and has an arc-shaped structure, which can achieve relatively stable support for the adsorption member 30 and ensure the assembly effect of the adsorption member 30.

[0070] In some embodiments, a plurality of ribs 112 are spaced apart in the circumferential direction of the first cover 11, and the gap between two adjacent ribs 112 allows liquid to pass through. The plurality of ribs 112 spaced apart in the circumferential direction of the first cover 11 can form a ring structure, and the ring structure is in contact with the adsorption member 30, making the structure relatively stable and reliable.

[0071] In some embodiments, a plurality of ribs 112 are spaced apart in the circumferential direction of the first cover 11 to form a rib group; the rib group includes a plurality of rib groups, which are arranged at intervals in the radial direction of the first cover 11. In the above structure of the embodiments of this application, the plurality of rib groups are in contact with the adsorption member 30, which provides more stable support for the adsorption member 30, and the second inlet 18 is also formed more stably.

[0072] In some embodiments, the fixing cover 12 is provided with a placement groove 121, and the bottom 127 of the placement groove 121 is provided with a plurality of openings 122, the openings 122 penetrating the fixing cover 12 in the thickness direction of the fixing cover 12; the adsorption member 30 is provided in the placement groove 121, the adsorption member 30 is provided with a through hole 31, the through hole 31 faces the bypass valve 20 and communicates with the opening 122; the opening 122 is constructed as part of the second inlet 18, and the through hole 31 is constructed as part of the second inlet 18.

[0073] In the embodiments of this application, the second inlet 18 is formed by multiple structures, that is, the second inlet 18 includes multiple branches. Thus, liquid enters the cavity 16 through the adsorption element 30 from the multiple branches, allowing the liquid entering the cavity 16 from the second inlet 18 to have more thorough contact with the adsorption element 30, thereby improving the adsorption effect of the filter 1. Of course, as explained above, the adsorption element 30 also simultaneously adsorbs impurities in the liquid entering the cavity 16 from the first inlet 17.

[0074] In this embodiment, liquid outside the filter 1 flows into the bypass valve 20 through the opening 122 and the through hole 31, and then enters the interior of the filter 1 through the bypass valve 20. During the liquid flow, the adsorbent 30 adsorbs impurities in the liquid, and the liquid is in direct contact with the adsorbent 30, so the adsorbent 30 can effectively adsorb impurities.

[0075] In some embodiments, the opening 122 includes a first opening 123, which is located in the middle of the bottom 127 of the tank. Along the axial direction of the filter 1, the first opening 123, the through hole 31, and the bypass valve 20 are arranged in sequence. The diameter of the first opening 123 is larger than the diameter of the through hole 31 so that a portion of the adsorption member 30 is exposed in the first opening 123.

[0076] In this embodiment of the application, the fact that part of the adsorbent 30 is exposed in the first opening 123 means that part of the adsorbent 30 can be seen through the first opening 123 in the axial direction. In this way, the adsorbent 30 can contact the liquid with a larger area to better adsorb impurities in the liquid.

[0077] In some embodiments, the diameter of the through hole 31 is larger than the diameter of the valve inlet 21 of the bypass valve 20, so as to reduce the obstruction of the valve inlet 21 by the adsorption element 30 and allow sufficient liquid to quickly enter the cavity 16 through the valve inlet 21.

[0078] In some embodiments, the first opening 123 is located in the middle of the bottom of the tank 127; the through hole 31 is located in the middle of the adsorption member 30; and the bypass valve 20 is located in the middle of the end wall 111. Along the axial direction of the filter 1, the first opening 123, the through hole 31, and the bypass valve 20 are arranged in sequence.

[0079] In the above structure of this application embodiment, since the first opening 123 is located in the middle of the bottom of the tank 127; the through hole 31 is located in the middle of the adsorption member 30; and the bypass valve 20 is located in the middle of the end wall 111, and the first opening 123, the through hole 31, and the bypass valve 20 are arranged in sequence, the liquid can quickly pass through the first opening 123, the through hole 31, and the bypass valve 20 into the cavity 16, ensuring the amount of liquid entering the cavity 16, thereby ensuring the flow rate of the filter 1.

[0080] In some embodiments, the bottom 127 of the placement tank 121 is provided with an abutment protrusion 125, which contacts the surface of the adsorbent 30 facing the bottom 127. The gap between the bottom 127 and the adsorbent 30 is part of the second inlet 18. In use, the filter 1 of this embodiment allows the liquid to be located in the gap between the bottom 127 and the adsorbent 30, increasing the contact area between the adsorbent 30 and the liquid, thus allowing the adsorbent 30 to better adsorb impurities in the liquid.

[0081] In some embodiments, the opening 122 further includes a plurality of second openings 124, the second openings 124 communicating the gap between the adsorption member 30 and the bottom of the tank 127.

[0082] In this embodiment, the liquid can flow through the second opening 124 into the gap between the bottom of the tank 127 and the adsorption element 30 and come into contact with the adsorption element 30. The adsorption element 30 has a large contact area with the liquid, which can better adsorb impurities in the liquid.

[0083] In some embodiments, the second opening 124 extends circumferentially along the fixed cover 12, and a plurality of second openings 124 are spaced apart circumferentially on the fixed cover 12. The bottom 127 between two adjacent second openings 124 is provided with an abutment protrusion 125. In the above structure of the embodiments of this application, liquid can enter the gap between the adsorption member 30 and the bottom 127 through the plurality of second openings 124.

[0084] In this embodiment, one side of the adsorption member 30 contacts the rib 112 and the other side contacts the abutting protrusion 125. The adsorption member 30 is fixed between the end wall 111 and the bottom of the groove 127 and has gaps with the end wall 111 and the bottom of the groove 127 respectively.

[0085] In some embodiments, a plurality of second openings 124 are arranged to form at least one annular structure, the center of which is located at the center of the tank bottom 127. The tank bottom 127 between adjacent second openings 124 in the annular structure has abutment protrusions 125. This arrangement of the second openings 124 allows liquid to flow evenly through the second openings 124 into the gap between the tank bottom 127 and the adsorbent 30. The abutment protrusions 125 are evenly distributed along the second annular structure, providing relatively stable support for the adsorbent 30. Each second opening 124 can be configured as an arc-shaped structure.

[0086] In some embodiments, there is a gap between the sidewall of the placement groove 121 and the radial outer side of the adsorption member 30. The gap between the sidewall of the placement groove 121 and the radial outer side of the adsorption member 30 is configured as part of the second inlet 18, which can increase the contact area of ​​the adsorption member 30 with the liquid, so that impurities in the liquid flowing through the gap between the sidewall of the placement groove 121 and the radial outer side of the adsorption member 30 are adsorbed by the adsorption member 30, and the adsorption effect of the filter 1 on impurities is better.

[0087] In this embodiment, gaps are provided between the adsorption element 30 and the side wall of the placement tank 121 and between the tank bottom 127, and the first opening 123 and the second opening 124 are designed to allow as much liquid as possible to flow through and to ensure that the liquid is in full contact with the adsorption element 30 so that impurities are adsorbed. The design of the first opening 123 and the second opening 124 can also save materials and reduce costs.

[0088] In some embodiments, the end wall 111 is provided with a snap-fit ​​portion 113, and a snap-fit ​​protrusion 114 is provided on the radially outer side of the snap-fit ​​portion 113. A snap-fit ​​groove 126 is provided on the side wall of the mounting groove 121 in the fixed cover 12. When the first cover 11 and the fixed cover 12 are assembled, the snap-fit ​​protrusion 114 is engaged in the snap-fit ​​groove 126, thereby achieving the connection between the first cover 11 and the fixed cover 12, which has the advantages of simple and convenient connection.

[0089] It is understood that the first cover 11 and the fixed cover 12 can also be connected in other feasible ways, such as using fasteners such as bolts. This application embodiment does not limit the specific connection method of the first cover 11 and the fixed cover 12.

[0090] In some embodiments, the adsorption element 30 includes at least one of a magnet, activated carbon, and silica gel. The adsorption element 30 is suitable for use in the filter 1 and has a good adsorption effect on impurities.

[0091] When the adsorption component 30 is a magnet, the magnet can generate a magnetic field and attract ferromagnetic materials. For example, it can adsorb impurities contained in the liquid due to wear of gears, etc. The magnet can be a permanent magnet, a metal alloy magnet, etc.

[0092] In some embodiments, the magnet has a ring-shaped structure, which has the advantages of small space occupation, simple and convenient installation, large area and strong adsorption capacity, and can adsorb more impurities.

[0093] In some embodiments, the filter 1 includes a filter element, a first cover 11, and a second cover 14. The filter element serves as the sidewall of the filter 1 and as the filter layer 13, and the filter element surrounds a cavity 16. The first cover 11 is located at one end of the filter element and is connected to a bypass valve 20 and an adsorption element 30. The second cover 14 is located at the other end of the filter element and has a filter outlet 141 communicating with the cavity 16.

[0094] In this embodiment, the first cover 11 protects one end of the filter element, and the second cover 14 protects the other end. The filter element is cylindrical with openings at both ends. The sidewall of the filter element forms the first inlet 17 of the filter, and the hollow part of the filter element forms the cavity 16 of the filter. A bypass valve 20 is installed at one opening of the filter element, allowing liquid to enter the interior of the filter element through the bypass valve 20. The other opening of the filter element is connected to the filter outlet 141. Liquid enters the cavity 16 through the filter element, which is the first inlet 17. The filter element filters the liquid. After impurities are adsorbed by the adsorbent 30 at the second inlet 18, the liquid then enters the cavity 16 through the bypass valve 20. The liquid in the cavity 16 flows out through the filter outlet 141.

[0095] The second cover 14 has a sidewall surrounding the outer periphery of the filter element, and there is a gap between the sidewall of the second cover 14 and the sidewall of the filter element for liquid to enter, thereby increasing the filtration area of ​​the filter 1.

[0096] The filter 1 of this embodiment has a normal state and a special state. In the normal state, the first inlet 17 of the cavity 16 is a conventional filtration channel, and the liquid enters the cavity 16 after passing through the filter layer 13 located at the first inlet 17. At this time, impurities in the liquid are trapped on the filter layer 13, causing the filtration speed of the filter 1 to slow down and the pressure difference between the liquid pressure outside the filter 1 and the liquid pressure inside the cavity 16 to increase. In the special state, when the pressure difference reaches the value at which the bypass valve 20 opens, the bypass valve 20 opens, and the liquid flows into the cavity 16 after passing through the adsorbent 30 located at the second inlet 18 and the bypass valve 20. The adsorbent 30 and the second inlet 18 in the filter 1 are designed to effectively ensure the flow rate of the filter 1. The adsorbent 30 can adsorb impurities without affecting the liquid flow rate, and it saves the need to install a filter screen at the second inlet 18, thereby reducing the cost of the filter 1.

[0097] Reference Figures 1 to 9 As shown in the illustration, this application provides a filtration device, which includes a housing 40 and a filter 1. The housing 40 has a receiving cavity 41, and the filter is disposed within the receiving cavity 41. The filtration device includes the filter 1, and also has the characteristic of the filter 1 that it can be used in both normal and special states. That is, through the setting of the adsorption element 30 and the second inlet 18, short-term connection can be achieved in special states such as when the flow rate drops at the first inlet 17, effectively ensuring the flow rate of the filter 1. The adsorption element 30 can adsorb impurities without affecting the liquid flow rate, and can also reduce the cost of the filter 1.

[0098] In some embodiments, the accommodating cavity 41 has an inlet 43 and an outlet 42; the cavity 16 also has a filter outlet 141, which is connected to the outlet 42, and the first inlet 17 and the second inlet 18 are respectively connected to the inlet 43.

[0099] In this embodiment of the filtration device, liquid enters the receiving cavity 41 through the inlet 43. If the filter element is not clogged, the liquid passes through the filter element located at the first inlet 17 and enters the interior of the filter element, then flows out through the filter outlet 141 and the outlet 42. The adsorbent 30 actively adsorbs impurities. After prolonged use, impurities accumulate on the filter element, causing blockage and reducing the filtration capacity of the filter 1. A pressure difference exists between the external liquid pressure of the filter 1 and the internal liquid pressure of the cavity 16. Under this pressure difference, the bypass valve 20 opens, allowing liquid to flow through the adsorbent 30 located at the second inlet 18. After being adsorbed by the adsorbent 30, impurities are adsorbed and the liquid enters the cavity 16 through the bypass valve 20. This embodiment of the filtration device achieves short-term connection under special conditions such as a decrease in flow rate at the first inlet 17, effectively ensuring the flow rate of the filter 1. The adsorbent 30 can adsorb impurities without affecting the liquid flow rate.

[0100] In some embodiments, the filter layer 13, the bypass valve 20, and the adsorption element 30 are all spaced apart from the cavity wall of the receiving cavity 41. This prevents the cavity wall of the receiving cavity 41 from obstructing the flow of liquid.

[0101] In some embodiments, the end wall of the third cover 50 is provided with a sludge storage tank 51 that is recessed away from the filter 1. In this embodiment, when the filter device is vertically arranged and the third cover 50 is located below the filter 1, large particles of impurities in the liquid will automatically fall into the sludge storage tank 51 due to gravity, and the sludge storage tank 51 can collect large particles of impurities.

[0102] In some embodiments, the accommodating cavity 41 is provided with a cavity opening 44, and the filter device further includes a third cover 50, which covers the cavity opening 44. The third cover 50 is provided with a limiting rib 52; the limiting rib 52 abuts against one end of the filter, and the other end of the filter abuts against the cavity wall of the accommodating cavity 41.

[0103] In this embodiment of the application, the end wall 111 of the third cover 50 is provided with a plurality of limiting ribs 52, which are arranged around the sludge storage tank 51 and are spaced apart from each other.

[0104] The filter 1 is positioned between the limiting rib 52 and the cavity wall of the receiving cavity 41, which has the advantages of simple and convenient assembly and prevents the filter 1 from moving up and down in the receiving cavity 41.

[0105] In some embodiments, one end of the second cover 14 is inserted into the liquid outlet 42, and the first O-ring 15 is disposed between one end of the second cover 14 and the liquid outlet 42 to prevent leakage.

[0106] One end of the third cover 50 is screwed into the receiving cavity 41 via an external thread. The second O-ring 54 is located between one end of the third cover 50 and the cavity wall of the receiving cavity 41 to prevent leakage. After the third cover 50 is installed in place, the anti-loosening bolt 61 is installed in the groove of the cover skirt 55 of the third cover 50 to prevent the third cover 50 from loosening and leaking oil during vibration.

[0107] The filtering device in this embodiment is located in the gearbox, and the usage process of the filtering device is as follows:

[0108] Under normal conditions, the dust holding capacity of the filter element of filter 1 is within its service life. The liquid in the gearbox enters the receiving cavity 41 through the inlet 43. Some impurities are filtered out as the liquid passes through the filter element of filter 1. The clean liquid after the impurities are removed enters the cavity 16 and flows to the filter outlet 141. It enters the gearbox through the outlet 42 to cool and lubricate the various components. Some impurities are actively adsorbed by the adsorption element 30 installed on filter 1. If filter 1 is in a vertical working position, some larger particles of impurities can automatically fall into the sludge storage tank 51 on the third cover 50 due to gravity.

[0109] Under special conditions, the dust holding capacity of filter element 1 exceeds its service life, and the pressure drop increases. Liquid in the gearbox enters the accommodating cavity 41 through inlet 43. Some impurities are filtered out as they pass through filter element 1. Since the dust holding capacity of filter element exceeds its service life, the pressure drop increases and bypass valve 20 opens. Some impurities are actively adsorbed and removed by adsorption element 30 as they pass through adsorption element 30 at second inlet 18. The liquid and the clean liquid that passed through filter element earlier merge in cavity 16 and enter gearbox through filter outlet 141 and outlet 42 to cool and lubricate various components. Some larger particles of impurities fall automatically into the sludge storage tank 51 on third cover 50 due to gravity.

[0110] This application embodiment also provides a gearbox, which includes the filtering device as described above, and the gearbox housing is the housing 40 of the filtering device.

[0111] In this embodiment, when the gearbox housing is the housing 40 of the filter device, the filter device is integrated inside the gearbox, providing filtered cooling and lubrication flow to the gearbox. Compared to placing the filter device on the outside of the housing, this avoids the filter device's own volume affecting the gearbox layout. Furthermore, during vehicle operation, compared to a separately protruding filter device, the probability of failure due to collision is reduced. Even if the filter element of filter 1 in this embodiment becomes clogged, the second inlet 18 and the adsorption element 30 ensure that a certain amount of liquid enters the cavity 16 of filter 1, thereby guaranteeing the amount of liquid entering the gearbox and preventing overheating and other problems caused by insufficient liquid supply. Moreover, the liquid entering the interior of filter 1 through the bypass valve 20 is also adsorbed with impurities, resulting in cleaner liquid entering the interior of filter 1.

[0112] This application also provides a vehicle, which includes the filter 1 as described above; and / or, the vehicle includes the filtration device as described above; and / or, includes the gearbox as described above.

[0113] In this embodiment, filter 1, filter device, gearbox and vehicle can be referenced to each other and have the same or similar beneficial effects as any of the aforementioned filter 1 and filter device. To avoid repetition, they will not be described again here.

[0114] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0115] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0116] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A filter, characterized in that, A cavity (16) is provided, the cavity (16) having a first inlet (17) and a second inlet (18); The filter includes: A filter layer (13) is provided at the first inlet (17) for filtering impurities in the liquid flowing into the cavity (16) from the first inlet (17); A switchable bypass valve (20) is provided at the second inlet (18); An adsorption element (30) is provided at the second inlet (18) and is used at least to adsorb impurities in the liquid flowing from the second inlet (18) through the bypass valve (20) into the cavity (16).

2. The filter according to claim 1, characterized in that, The filter also includes: A first cover (11) is provided at the second inlet (18), and the bypass valve (20) is provided on the first cover (11); A fixed cover (12) is provided on the side of the first cover body (11) away from the cavity (16), and the fixed cover (12) is fixedly connected to the first cover body (11); The adsorption element (30) is disposed between the first cover (11) and the fixed cover (12).

3. The filter according to claim 2, characterized in that, The adsorption element (30) and at least one of the first cover (11) and the fixed cover (12) surround a portion of the second inlet (18).

4. The filter according to claim 3, characterized in that, The end wall (111) of the first cover (11) is provided with a plurality of ribs (112), the ribs (112) are spaced apart from each other, and the ribs (112) are in contact with the surface of the adsorption member (30) facing the end wall (111); The gaps between the first cover (11) and the adsorption member (30), and between two adjacent ribs (112), constitute at least a portion of the second inlet (18).

5. The filter according to claim 4, characterized in that, The ribs (112) extend circumferentially along the first cover (11), and / or, a plurality of the ribs (112) are spaced apart circumferentially in the first cover (11).

6. The filter according to claim 4, characterized in that, A plurality of the raised ribs (112) spaced apart in the circumferential direction of the first cover (11) form a rib group; The rib group includes multiple rib groups, which are arranged at intervals in the radial direction of the first cover (11).

7. The filter according to claim 3, characterized in that, The fixed cover (12) is provided with a mounting groove (121), and the bottom (127) of the mounting groove (121) is provided with multiple openings (122), and the openings (122) penetrate the fixed cover (12) along the axial direction of the filter; The adsorption element (30) is disposed in the placement groove (121), and the adsorption element (30) is provided with a through hole (31). The through hole (31) faces the bypass valve (20) and communicates with the opening (122). The opening (122) is configured as part of the second inlet (18), and the through hole (31) is configured as part of the second inlet (18).

8. The filter according to claim 7, characterized in that, The opening (122) includes a first opening (123), which is located in the middle of the bottom of the tank (127). Along the axial direction of the filter, the first opening (123), the through hole (31), and the bypass valve (20) are arranged sequentially. The diameter of the first opening (123) is larger than the diameter of the through hole (31) so that a portion of the adsorption element (30) is exposed through the first opening (123); and / or, The diameter of the through hole (31) is larger than the diameter of the valve inlet (21) of the bypass valve (20).

9. The filter according to claim 7, characterized in that, The bottom (127) of the placement groove (121) is provided with an abutment protrusion (125), which contacts the surface of the adsorption member (30) facing the bottom (127). The gap between the bottom (127) and the adsorption member (30) is constructed as part of the second inlet (18).

10. The filter according to claim 9, characterized in that, The opening (122) also includes a plurality of second openings (124), which connect the gap between the adsorption element (30) and the bottom of the tank (127).

11. The filter according to claim 10, characterized in that, The second opening (124) extends circumferentially along the fixed cover (12), and a plurality of second openings (124) are spaced apart circumferentially on the fixed cover (12). The groove bottom (127) between two adjacent second openings (124) is provided with the abutting protrusion (125).

12. The filter according to claim 7, characterized in that, There is a gap between the sidewall of the placement groove (121) and the radial outer side of the adsorption member (30), and the gap between the sidewall of the placement groove (121) and the radial outer side of the adsorption member (30) is constructed as part of the second inlet (18).

13. The filter according to any one of claims 1-12, characterized in that, The adsorption element (30) includes at least one of magnet, activated carbon, and silica gel.

14. A filtration device, characterized in that, The device includes a housing (40) and a filter as claimed in any one of claims 1-13, wherein the housing (40) is provided with a receiving cavity (41) and the filter is disposed within the receiving cavity (41).

15. The filtration device according to claim 14, characterized in that, The accommodating cavity (41) has a liquid inlet (43) and a liquid outlet (42); The cavity (16) also has a filter outlet (141) which is connected to the liquid outlet (42), and the first inlet (17) and the second inlet (18) are respectively connected to the liquid inlet (43).

16. The filtration device according to claim 14, characterized in that, The filter layer (13), the bypass valve (20), and the adsorption element (30) are all spaced apart from the cavity wall of the accommodating cavity (41).

17. The filtration device according to claim 14, characterized in that, The accommodating cavity (41) is provided with a cavity opening (44), and the filtering device further includes a third cover (50), which covers the cavity opening (44), and the third cover (50) is provided with a limiting rib (52). The limiting rib (52) abuts against one end of the filter, and the other end of the filter abuts against the cavity wall of the receiving cavity (41).

18. The filtration device according to claim 17, characterized in that, The end of the third cover (50) is provided with a sludge storage tank (51) that is recessed away from the filter.

19. A gearbox, characterized in that, The gearbox includes a filter device as described in any one of claims 14-18, and the gearbox housing is the housing (40) of the filter device.

20. A vehicle, characterized in that, The vehicle includes a filter as claimed in any one of claims 1-13; and / or includes a filter device as claimed in any one of claims 14-18; and / or includes a transmission as claimed in claim 19.

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