A filter of the multi-stage filtration type

Abstract

The application relates to a multi-stage filtering filter, and relates to the technical field of filters.The multi-stage filtering filter comprises a shell, a cover body arranged on the shell and provided with an oil inlet hole and an oil outlet hole, a filter element assembly arranged in the shell and forming an oil inlet channel and an oil outlet channel, oil in the oil inlet channel being filtered by the filter element assembly and then being sequentially output through the oil outlet channel and the oil outlet hole, a bypass valve located at a connection position of the oil inlet channel and the oil outlet channel, and a filtering assembly used for filtering oil input into the oil outlet channel after the bypass valve is opened. According to the application, the bypass valve is opened, the filtering element filters the input oil and then inputs the oil into the oil outlet channel, so that the oil can be filtered after the bypass valve is opened, and the filtering effect of the filter is further improved.

Description

Technical Field

[0001] This application relates to the technical field of filters, and more particularly to a multi-stage filtration filter. Background Technology

[0002] A filter is an accessory that filters impurities through a filter element. It is used to filter media in lubrication systems, combustion systems, and engine intake systems.

[0003] The oil filter includes a housing, a cover fixedly connected to the housing, and a filter element assembly disposed within the housing. The cover has an inlet and an outlet. An inlet channel communicating with the inlet is formed between the housing and the filter element assembly. An outlet channel communicating with the outlet is formed within the filter element assembly. The filter element assembly includes a filter element and a front end cover and a rear end cover disposed at both ends of the filter element. The inlet channel is located on the outside of the filter element, and the outlet channel is located on the inside of the filter element. A connection port communicating with the inlet channel and the outlet channel is provided on the rear end cover, and a bypass valve is provided at the connection port.

[0004] The principle is that unfiltered oil flows into the input channel from the input port, is filtered by the filter element, and then enters the output channel and flows out through the output port. However, after a long period of use, the filter element's filter holes are easily clogged by impurities and dirt, which increases the oil pressure inside the filter. This causes the bypass valve to open and flow directly into the output channel and out through the output port, resulting in the oil flowing out without being filtered, thus reducing the filter's filtration effect. Summary of the Invention

[0005] In order to improve the filtration effect of the filter, this application provides a multi-stage filtration filter.

[0006] This application provides a multi-stage filtration filter, which adopts the following technical solution: A multi-stage filtration filter, comprising: shell; The cover is detachably mounted on the outer shell and has an oil inlet and an oil outlet for oil input and output. The filter element assembly is disposed inside the housing and forms an oil inlet channel and an oil outlet channel respectively connected to the oil inlet hole and the oil outlet hole. The oil in the oil inlet channel is filtered by the filter element assembly and then output through the oil outlet channel and the oil outlet hole in sequence. The bypass valve is located at the connection between the oil inlet channel and the oil outlet channel; A filter assembly is used to filter the engine oil that enters after the bypass valve is opened before it enters the oil outlet channel. The filter assembly includes: A filter element is disposed on the filter element assembly and located in the oil outlet channel. The filter element has multiple filter holes on the side wall near the filter element assembly, and the bypass valve is located inside the filter element. The cap is placed on the end of the filter element away from the bypass valve and seals the filter element.

[0007] By adopting the above technical solution, engine oil enters the oil inlet channel through the oil inlet hole, is filtered by the filter element assembly, and then enters the oil outlet channel. Finally, the engine oil is output through the oil outlet hole. If impurities cause the filter element assembly to become clogged, the engine oil pushes the bypass valve to open, and then the engine oil enters the filter element. After being filtered by the filter element, the engine oil enters the oil outlet channel and is finally output through the oil outlet hole. Thus, even after the bypass valve is opened, engine oil filtration can still be achieved, thereby further improving the filtration effect of the filter.

[0008] Meanwhile, since no oil enters the oil outlet channel at the clogged part of the filter element assembly, when the oil passing through the filter element reaches this point, it can enter the filter element assembly and push the impurities blocking the filter element off. The oil passing through the filter holes moves towards the filter element assembly under the guidance of the filter holes, further improving the cleaning effect on the impurities blocking the filter element assembly. This allows the oil to continue to pass through the filter element assembly for filtration, thereby further improving the filtration effect of the filter. Moreover, the oil passing through the filter element assembly enters the oil outlet channel and enters the filter ring through multiple filter holes, which can cause the impurities blocking the filter ring to fall off. This maintains the filtration effect of the oil after the bypass valve is opened, thereby further improving the filtration effect of the filter and ensuring that the filter outputs sufficient oil for lubrication.

[0009] Optionally, the filter assembly includes: The filter element is detachably mounted on the mounting component, which has a connecting hole that connects the oil inlet channel and the oil outlet channel. The elastic element presses against the end of the mounting component away from the cover and the outer shell at both ends; The check valve, under the elastic force of the elastic element, abuts against the mounting part and the cover to position itself and block the oil in the oil inlet from entering the oil inlet hole. The oil inlet channel is formed by the cooperation between the outer wall of the filter element and the inner wall of the housing and extends to the side of the mounting part away from the cover. The oil outlet channel is formed through the inner side of the mounting part and allows the oil to enter the oil outlet channel after being filtered by the filter element. The bypass valve and the filter element are installed on the mounting part. The bypass valve controls the opening or blocking of the connection hole.

[0010] By adopting the above technical solution, the filter element can be replaced or cleaned after removing the cover. The elastic element is placed inside the housing, the filter element is installed on the mounting piece, and then the mounting piece is placed inside the housing and pressed against the elastic element. Next, the check valve is inserted, and finally the cover is fixedly installed on the housing. The check valve is positioned by pressing against the end of the mounting piece away from the elastic element and the cover under the elastic force of the elastic element. This facilitates the replacement or cleaning of the filter element, or the replacement of multiple structures of the filter. Moreover, the elastic element can dampen and buffer the filter during operation, making the filter more stable during filtration, thereby improving the filtration effect of the filter.

[0011] Optionally, the bypass valve includes: A fixed tube is installed on the mounting component, with the connection hole located inside the fixed tube and the fixed tube communicating with the oil inlet channel and the oil outlet channel. The sealing block is connected to the fixed tube by an elastic element and presses against the mounting part under the action of elasticity to seal the connection hole.

[0012] By adopting the above technical solution, the engine oil moves into the connecting hole through the oil inlet channel. The engine oil exerts a certain pressure on the sealing block. After the filter element assembly is blocked, the thrust of the engine oil on the sealing block increases, causing the sealing block to overcome the elastic force of the elastic element and detach from the mounting part. This allows the engine oil to enter the fixed pipe through the connecting hole. The engine oil overflows into the inside of the filter element through the top of the fixed pipe. After being filtered by the filter element, the engine oil moves towards the filter element assembly, which allows the engine oil to better clean the impurities blocking the filter element assembly and improve the filtration effect of the filter.

[0013] Optionally, the sealing block is provided with a guide component, the guide component comprising: Guide tube one, is installed on the outer casing; Guide tube 2 is set on the sealing block and slides through guide tube 1. Guide tube 2 coaxially passes through the connecting hole and forms an annular flow cavity with the connecting hole. The elastic element is sleeved on guide tube 1 at the end opposite to the mounting part for positioning.

[0014] By adopting the above technical solution, when installing the mounting components, the elastic element is fitted onto the first guide tube for positioning, and then the second guide tube slides through the first guide tube to position the mounting components. This improves the accuracy of the position of multiple structures in the filter after installation, enhances the stability of the filter after installation, and guides the movement of the mounting components and elastic elements, as well as the movement of the sealing block, making the movement of the sealing block more stable and accurate. This further improves the stability of the filter after installation, enhances the filtration effect, and ensures that the filter outputs sufficient oil for lubrication.

[0015] Optionally, the mounting component includes a mounting plate, a mounting tube, and a sealing plate. The mounting tube is coaxially mounted on the mounting plate. The filter element is sleeved on the mounting tube and abuts against the mounting plate for positioning. The sealing plate is inserted into the end of the mounting tube away from the mounting plate. The check valve is pressed against the sealing plate and the cover for positioning under the elastic force of the elastic element.

[0016] By adopting the above technical solution, it is easier to replace the filter element, and the convenience of installing or replacing multiple structures inside the filter is improved.

[0017] Optionally, it also includes a collection assembly for collecting impurities that fall onto the filter element, the collection assembly comprising: The collection component is detachably installed on the inner wall of the outer casing at the end opposite to the cover, near the oil inlet channel, and is in an open state. A guide member, disposed on the mounting member and extending to the collecting member, is annular in shape such that the connecting hole is located inside the guide member; The fixing element is installed at the opening of the collecting element and located inside the guide element; A positioning component is installed on the side wall of the fixing component away from the collecting component and presses against the guide component under the action of elasticity; the fixing component, the positioning component and the inner side of the fixing component form a guide chamber that communicates with the connecting hole; the fixing component has an installation hole that communicates with the inside of the collecting component and the guide chamber and has a diameter larger than the filter hole; the oil in the oil inlet channel enters the collecting component under the action of the guide component and changes its moving direction before entering the guide chamber through the installation hole.

[0018] By adopting the above technical solution, the fallen impurities flow towards the oil outlet channel with the engine oil. The impurities and engine oil move to the collection device through the outside of the guide and under the action of the guide. Then, the engine oil enters the guide chamber through the mounting hole under the guidance of the guide. Next, the engine oil enters the oil outlet channel through the connecting hole. Since the oil flows in opposite directions in the oil inlet and outlet channels, the movement direction of the oil changes at the collection device. This change in direction makes it easier for impurities to stay in the collection device, thereby reducing the risk of impurities continuing to move to the filter element assembly and causing blockage. Moreover, the mounting hole allows for the pre-filtration of large impurities in the engine oil. The engine oil then undergoes a second filtration through the filter element and is supported by the elastic positioning element against the guide, thereby positioning multiple structures simultaneously. This further improves the filtration effect and ensures that the filter outputs sufficient engine oil for lubrication.

[0019] Optionally, the filter element is telescopic and formed by multiple mutually sliding and nested filter rings. The outermost filter ring is connected to the mounting component, and the innermost filter ring is connected to the cover. The filter holes are located on the multiple filter rings. The oil in the bypass valve pushes the cover to extend the filter element. The oil entering the oil outlet channel through the filter element assembly pushes the filter element to retract and increases the space for oil flow in the oil outlet channel. When the filter element extends or retracts, it can scrape off impurities adhering to the filter rings.

[0020] By adopting the above technical solution, after the connection hole is opened, the engine oil enters the filter element. After being filtered through the filter hole, the engine oil enters the oil outlet channel. At the same time, the engine oil pushes the cover to move, causing the length of the filter element to extend. This allows the engine oil passing through the filter hole to cover a larger area of ​​the filter element assembly, enabling more engine oil to pass through the filter element assembly and dislodging the impurities clogging it. This further improves the cleaning effect on the impurities on the filter element assembly, allowing the engine oil to pass through the filter element assembly for filtration more quickly, further improving the filtration effect, and ensuring that the filter outputs sufficient engine oil for lubrication.

[0021] When the engine oil can pass through the filter assembly normally, it enters the oil outlet channel and pushes the cover back, reducing the pushing effect on the cover and causing the filter element to retract to its shortest state. This allows for more space for the engine oil to pass through the filter assembly, further improving the filtration effect. At the same time, the movement of multiple filter elements can scrape off impurities adhering to the filter elements, ensuring that more engine oil passes through the filter holes for filtration, thus further improving the filtration effect and ensuring that the filter outputs sufficient engine oil for lubrication.

[0022] Optionally, the cover is provided with a spherical arc surface protruding toward the oil outlet, which facilitates the movement of the filter element by the oil and causes the filter element to retract.

[0023] By adopting the above technical solution, the oil can more easily push the cap back, causing the filter element to retract to its shortest state, thereby further improving the filtration effect and ensuring that the filter outputs sufficient oil for lubrication.

[0024] Optionally, the mounting component is provided with a circumferential array of multiple collection components for collecting impurities that fall onto the filter element, the collection components including: A collection ring groove is installed on the mounting plate and is used to collect impurities that fall off the filter element; A baffle is rotatably mounted on the collection ring groove and connected to a bypass valve via a linkage assembly. When the bypass valve is open, the linkage assembly pushes the baffle to rotate and open the collection ring groove, allowing impurities falling from the filter element to pass through for collection. When the bypass valve is closed, the linkage assembly causes the baffle to block the collection ring groove and prevent impurities in the collection ring groove from moving out.

[0025] By adopting the above technical solution, when the bypass valve is opened, the baffle is driven to rotate by the linkage component to open the collection ring groove, so that the impurities falling on the filter element fall into the collection ring groove. When the bypass valve is closed, the baffle is driven to close by the linkage component, which reduces the risk of subsequent impurities moving out of the collection ring groove and clogging the filter holes. This can better maintain the filtration effect of the filter element, further improve the filtration effect of the filter, and ensure that the filter outputs sufficient oil for lubrication.

[0026] Optionally, the linkage component includes: The linkage rod is slidably mounted on the bypass valve; Two linkage blocks are mounted on the linkage rod; A linkage rod is installed on the baffle. When the bypass valve is opened or closed, it drives the linkage rod to move. The movement of the linkage rod drives the linkage rod and the baffle to rotate through two linkage blocks.

[0027] By adopting the above technical solution, when the bypass valve is opened or closed, the linkage rod is driven to move. The movement of the linkage rod drives the two linkage blocks to move. The movement of the two linkage blocks drives the linkage column and the baffle to rotate, thereby realizing the rotation of the baffle.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. After the bypass valve is opened, the filter element filters the incoming engine oil and then inputs it into the oil outlet channel. Thus, the engine oil can still be filtered even after the bypass valve is opened, thereby further improving the filtration effect of the filter.

[0029] 2. Guided by the filter holes, the oil enters the filter element assembly and pushes the impurities blocking the filter element off, improving the cleaning effect on the filter element assembly. This allows the oil to continue to pass through the filter element assembly for filtration, further improving the filter's filtration efficiency. Furthermore, the oil passing through the filter element assembly enters the oil outlet channel and passes through multiple filter holes into the filter ring, causing impurities blocking the filter ring to fall off. This maintains the filtration effect of the oil after the bypass valve opens, further improving the filter's filtration efficiency and ensuring that the filter outputs sufficient oil for lubrication.

[0030] 3. As the falling impurities move with the engine oil into the collection unit, the engine oil then sequentially enters the oil outlet channel through the mounting hole and guide chamber. Because the direction of movement of the engine oil changes at the collection unit, impurities are more likely to remain in the collection unit, thereby reducing the risk of impurities continuing to move to the filter element assembly and causing clogging. Moreover, the mounting hole allows for the pre-filtration of large impurities in the engine oil. The engine oil then undergoes a second filtration through the filter element, and the elastic positioning element abuts against the guide element, thereby simultaneously positioning multiple structures, which further improves the filtration effect and ensures that the filter outputs sufficient engine oil for lubrication. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural schematic diagram of filter embodiment 1; Figure 2 yes Figure 1 A cross-sectional schematic diagram of AA in the middle; Figure 3 yes Figure 2 Enlarged diagram of section B; Figure 4 yes Figure 2 Enlarged diagram of section C; Figure 5 This is a three-dimensional structural diagram of filter embodiment 2; Figure 6 yes Figure 5 A cross-sectional schematic diagram of DD; Figure 7 yes Figure 6 Enlarged schematic diagram of section E in the middle; Figure 8 yes Figure 6 Enlarged schematic diagram of section F in the middle.

[0032] Reference numerals: 1. Outer shell; 11. Cover; 12. Oil inlet; 13. Oil outlet; 14. Oil inlet channel; 15. Oil outlet channel; 16. Connection hole; 2. Filter element assembly; 21. Filter element body; 22. Elastic element; 23. Check valve; 3. Mounting component; 31. Mounting plate; 32. Mounting pipe; 33. Sealing plate; 34. Sealing pipe; 35. Positioning part; 36. Positioning groove; 4. Filter assembly; 41. Filter element; 42. Cover; 44. Limiting protrusion; 45. Spherical arc surface; 46. Filter ring; 5. Bypass valve; 51. Fixed... 52. Fixed pipe; 53. Sealing block; 54. Socket part; 55. Fixing part; 56. Elastic part; 6. Storage assembly; 61. Collecting part; 62. Guide part; 63. Fixing part; 64. Positioning part; 65. Positioning ring; 66. Positioning hole; 67. Guide chamber; 68. Mounting hole; 7. Guide assembly; 71. Guide tube one; 72. Guide tube two; 73. Flow chamber; 8. Collection assembly; 81. Collection ring groove; 82. Baffle; 9. Linkage assembly; 91. Linkage rod; 92. Linkage block; 93. Linkage column. Detailed Implementation

[0033] The following provides a further detailed description of this application.

[0034] This application discloses a multi-stage filtration filter.

[0035] Example 1, referring to Figure 1 The multi-stage filtration filter includes a housing 1, a cover 11, a filter element assembly 2, a bypass valve 5, and a filter assembly 4. The housing 1 is in the shape of a cylindrical tube with one end sealed and the other end open. The cover 11 is threaded to the open end of the housing 1 for sealing. The cover 11 and the housing 1 are coaxially arranged. The cover 11 has an oil outlet hole 13 coaxially opened on it, and multiple oil inlets 12 are arranged in a circumferential array around its own axis.

[0036] The filter element assembly 2 is disposed inside the housing 1. An oil inlet channel 14 is formed between the outer side of the filter element assembly 2 and the inner sidewall of the housing 1, communicating with multiple oil inlet holes 12. An oil outlet channel 15 is formed on the inner side of the filter element assembly 2, communicating with an oil outlet hole 13. The oil inlet channel 14 and the oil outlet channel 15 are arranged along the axis of the housing 1. A bypass valve 5 is disposed at the connection between the oil inlet channel 14 and the oil outlet channel 15. The filter assembly 4 is disposed inside the oil outlet channel 15. Engine oil enters the oil inlet channel 14 through the oil inlet hole 12, is filtered by the filter element assembly 2, and then enters the oil outlet channel 15. Finally, the engine oil is output through the oil outlet hole 13. If the filter element assembly 2 is blocked, the thrust on the bypass valve 5 is increased, causing the bypass valve 5 to open, and the engine oil is filtered by the filter assembly 4 before being output from the oil outlet hole 13.

[0037] Reference Figures 2-4The filter element assembly 2 includes a filter element body 21, an elastic element 22, and a check valve 23. The filter element is detachably mounted on the mounting component 3. The mounting component 3 includes a mounting plate 31, a mounting tube 32, and a sealing plate 33. The mounting plate 31 is horizontal and coincides with the axis of the outer shell 1. The mounting plate 31 is located inside the outer shell 1 and at the end away from the cover 11. The mounting tube 32 is coaxially fixedly mounted on the mounting plate 31. The mounting tube 32 is coaxially arranged with the outer shell 1. The filter element body 21 is sleeved on the mounting tube 32 and its bottom end abuts against the mounting plate 31 for positioning. The mounting tube 32 has multiple passage holes evenly opened for oil to pass through. The sealing plate 33 is coaxially arranged with a sealing tube 34. The sealing tube 34 extends to the upper and lower sides of the sealing plate 33 and is coaxially arranged with the mounting tube 32. The sealing tube 34 extends to the inside of the mounting tube 32, and the sealing plate 33 abuts against the top of the mounting tube 32 and presses against the end of the filter element body 21 near the cover 11 for positioning.

[0038] The elastic element 22 is a spring. The mounting plate 31 has a recessed positioning part 35 on the side wall opposite to the cover 11. The inner side wall of the outer shell 1 opposite to the cover 11 has a positioning surface parallel to the positioning part 35. One end of the elastic element 22 presses against the positioning surface, and the other end of the elastic element 22 presses against the positioning part 35. The positioning part 35 and the positioning surface are used to position the elastic element 22. The check valve 23 is located between the sealing plate 33 and the cover 11. The sealing plate 33 has an annular positioning groove 36 on the side wall near the check valve 23. Under the elastic force of the elastic element 22, the check valve 23 presses against the cover 11 and the positioning groove 36. The positioning groove 36 positions the sealing plate 33. The check valve 23 is used to prevent the oil in the oil inlet channel 14 from entering the oil inlet hole 12 and flowing back. The check valve 23 is a structure in the prior art and will not be described in detail here.

[0039] The filter element 21 is fitted onto the mounting tube 32 and positioned against the mounting plate 31. Then, the elastic element 22, filter element 21, sealing plate 33, and check valve 23 are sequentially placed into the outer casing 1. The cover 11 is then threaded onto the outer casing 1, so that the elastic element 22 presses against the positioning part 35 and the positioning surface, and the check valve 23 presses against the cover 11 and the sealing plate 33 for positioning, thereby realizing the installation of multiple structures of the filter.

[0040] The oil inlet channel 14 is formed by the cooperation between the sealing plate 33, the filter element 21 and the mounting plate 31 and the inner wall of the outer shell 1. The oil outlet channel 15 is formed through the inner side of the mounting pipe 32. A connecting hole 16 is formed on the positioning part 35 to connect the oil inlet channel 14 and the oil outlet channel 15. The bypass valve 5 is fixedly installed on the mounting plate 31 and located in the oil outlet channel 15. The connecting hole 16 is connected to the bypass valve 5.

[0041] Engine oil enters the oil inlet channel 14 through the oil inlet hole 12, then is filtered through the filter element 21 before entering the oil outlet channel 15 through multiple passage holes. Simultaneously, the oil moves through the oil inlet channel 14 to the connection hole 16, where the bypass valve 5, under its elastic force, blocks the connection hole 16. If the filter element 21 is blocked, less oil enters the oil outlet channel 15, while the amount entering through the oil inlet hole 12 remains unchanged. This increases the thrust of the bypass valve 5, causing it to open the connection hole 16. Some oil then passes through the connection hole 16 and the bypass valve 5 into the filter assembly 4 for filtration before moving to the oil outlet channel 15. The oil in the oil outlet channel 15 is then output sequentially through the sealing pipe 34, the check valve 23, and the oil outlet hole 13. This ensures sufficient oil is output through the oil outlet hole 13, reduces impurities in the output oil, improves the filter's filtration effect, and guarantees adequate oil output for lubrication.

[0042] Reference Figures 2-4 The filter assembly 4 includes a filter element 41 and a cover 42. The filter element 41 is annular and is fixedly installed on the side wall of the mounting plate 31 away from the elastic member 22. The filter element 41 is located inside the mounting tube 32 and is coaxially arranged with the mounting tube 32. The outer diameter of the filter element 41 is smaller than the inner diameter of the mounting tube 32. Multiple filter holes are spaced apart along the axis and circumference of the filter element 41 on the side wall of the filter element 41 near the mounting tube 32. The diameter of the filter holes is larger than the diameter of the filter holes in the filter element body 21. The cover 42 is fixedly installed on the end of the filter element 41 away from the mounting plate 31 and is used to seal the top of the filter element 41.

[0043] The bypass valve 5 includes a fixed pipe 51 and a sealing block 52. The fixed pipe 51 is fixedly installed on the side wall where the mounting plate 31 connects to the filter element 41. The fixed pipe 51 is located inside the filter element 41 and communicates with the connection hole 16 inside. The top of the fixed pipe 51 is coaxially rolled inward to form a fixing part 55. The sealing block 52 includes a sealing part 53 and a sleeve part 54 coaxially arranged. The outer diameter of the sleeve part 54 is smaller than the outer diameter of the sealing part 53. An elastic member 56 is sleeved on the sleeve part 54. The elastic member 56 is a spring. The two ends of the elastic member 56 press against the fixing part 55 and the sealing part 53, so that the sealing part 53 presses against the mounting plate 31 and seals the connection hole 16.

[0044] The oil in the oil inlet channel 14 exerts pressure on the sealing part 53 through the connecting hole 16. The elastic element 56 overcomes the pressure of the oil. When the filter element 21 is blocked, the pressure increases and becomes greater than the elasticity of the elastic element 56. The oil pushes the sealing part 53 to separate from the mounting plate 31, thereby opening the connecting hole 16. The oil enters the fixed pipe 51 through the gap between the sealing part 53 and the mounting plate 31. Then, the oil enters the inside of the filter element 41 through the top of the fixed pipe 51. After being filtered through the filter hole, the oil enters the oil outlet channel 15 and is output through the oil outlet channel 15. Since there is no oil output at the blocked part of the filter element 21, some oil can push the impurities blocked on the filter element 21 to fall off through the passage hole, so that the oil can continue to pass through the filter element 21, thereby improving the filtration effect of the filter.

[0045] The working principle of this application embodiment is as follows: Engine oil enters the oil inlet channel 14 through the oil inlet hole 12. After being filtered by the filter element body 21, the engine oil enters the oil outlet channel 15. At the same time, the engine oil moves to the connection hole 16 to maintain a certain pressure on the bypass valve 5. The engine oil in the oil outlet channel 15 is output through the oil outlet hole 13. When the filter element body 21 is blocked, the pressure on the bypass valve 5 increases, pushing the sealing part 53 to open the connection hole 16, allowing the engine oil to enter the filter element 41 through the bypass valve 5. After being filtered by the filter hole, the engine oil enters the oil outlet channel 15 for output. At the same time, some engine oil can push the impurities blocked on the filter element body 21 to fall off, allowing the engine oil to continue to pass through the filter element body 21. This improves the filtration effect of the filter and ensures that the filter outputs sufficient engine oil for lubrication.

[0046] Example 2, refer to Figures 5-8 The difference between this embodiment and embodiment 1 is that it also includes a collection component 6 for collecting impurities that fall off the filter element 21, a guide component 7 is provided on the sealing block 52, and multiple collection components 8 for collecting impurities that fall off the filter element 41 are provided on the mounting plate 31; the filter element 41 is in a retractable state. When the bypass valve 5 is opened, the oil entering the filter element 41 can push the filter element 41 to extend, increasing the area of ​​the oil passing through the filter holes. At the same time, when the oil normally passes through the filter element 21 and enters the oil outlet channel 15, the oil pushes the filter element 41 to retract to its original length.

[0047] The guide assembly 7 includes a guide tube 1 71 and a guide tube 2 72. The guide tube 1 71 is fixedly installed on the positioning surface, and the elastic element 22 is sleeved on the guide tube 1 71 to achieve guidance and positioning. The guide tube 2 72 is fixedly installed on the side wall of the sealing part 53 near the mounting plate 31. The guide tube 2 72 passes through the connecting hole 16 coaxially and slides through the guide tube 1 71. The guide tube 2 72 and the connecting hole 16 cooperate to form a flow cavity 73 for oil to pass through.

[0048] First, the elastic element 22 is fitted onto the guide tube 2 72 and positioned against the outer shell 1. Then, the mounting part 3 is placed inside the outer shell 1, and the guide tube 1 71 and the guide tube 2 72 are slidably connected to position the mounting part 3 and the filter element 21. This greatly improves the accuracy of multiple structural positions after the filter is installed and improves the filtration effect of the filter.

[0049] The storage component 6 includes a collecting component 61, a guide component 62, a fixing component 63, and a positioning component 64. A positioning ring 65 is coaxially fixedly installed on the bottom wall of the inner shell 1, and the bottom end of the elastic component 22 is located inside the positioning ring 65. The collecting component 61 is annular and has a positioning hole 66 coaxially formed on the positioning ring 65. The collecting component 61 is positioned against the bottom wall of the inner shell 1, thereby realizing the detachable installation of the collecting component 61 on the outer shell 1, so as to facilitate the removal of the collecting component 61 for replacement or cleaning. The end of the collecting component 61 near the mounting plate 31 and the oil inlet channel 14 is open. The guide component 62 is annular and has an arc cross-section. The guide component 62 is coaxially fixedly installed on the side wall of the mounting plate 31 near the collecting component 61. The guide component 62 protrudes towards the collecting component 61 and extends into the inner side of the collecting component 61.

[0050] The fixing member 63 is annular and coaxially fixedly installed on the inner wall of the collecting member 61, and the fixing member 63 is located inside the guide member 62; the positioning member 64 is coaxially fixedly installed on the outer wall of the mounting member 3, the positioning member 64 is elastic and presses against the inner wall of the guide member 62 for positioning under the action of elastic force, and at the same time, the positioning member 64 and the fixing member 63 together form a guide chamber 67 communicating with the connecting hole 16 on the side near the mounting plate 31 and the inner side of the guide member 62; the fixing member 63 is evenly provided with a plurality of mounting holes 68 communicating with the inside of the collecting member 61 and the guide chamber 67, and the diameter of the mounting holes 68 is larger than the diameter of the filter holes.

[0051] When the bypass valve 5 is opened, the oil in the guide chamber 67 enters the oil outlet channel 15 through the connection hole 16 and the filter hole. Some of the oil pushes the impurities on the filter element 21 to fall off. The impurities move with the mechanism and are guided by the guide 62 to the collection element 61. Since the oil flow direction in the oil inlet channel 14 and the oil outlet channel 15 is opposite, the movement direction of the oil when it enters the collection element 61 changes from the movement direction of the oil when it moves to the guide chamber 67 through the mounting hole 68. The change in movement direction causes the impurities to stay in the collection element 61, reducing the risk of the impurities continuing to move and blocking the filter element 21. At the same time, the mounting hole 68 can block larger impurities in the collection element 61, reducing the filtration pressure of the filter element 41. This greatly improves the filtration effect of the filter and ensures that the filter outputs enough oil for lubrication.

[0052] The filter element 41 is telescopic and is formed by multiple filter rings 46 that slide and fit together. The multiple filter rings 46 are coaxially arranged and their diameters gradually change. The outermost filter ring 46 has the largest diameter and is fixedly connected to the mounting plate 31, while the innermost filter ring 46 is fixedly connected to the cover 42. The filter holes are located on the multiple filter rings 46. Limiting protrusions 44 are fixedly installed on the filter rings 46 to position the filter rings 46 when they slide, ensuring that the multiple filter rings 46 do not detach from each other when they slide.

[0053] The oil flowing through the bypass valve 5 pushes the cover 42 to extend the filter element 41; the oil flowing through the filter element body 21 into the oil outlet channel 15 pushes the filter element 41 to retract, increasing the space for oil flow within the oil outlet channel 15. Both the extension and retraction of the filter element 41 scrape off impurities adhering to the filter rings 46, causing them to fall off. The cover 42 is a hemispherical thin-shell structure, with a protruding spherical arc surface 45 at the end away from the filter element 41 and mounting plate 31. This reduces the weight of the cover 42 and facilitates the oil pushing multiple filter rings 46 closer to the mounting plate 31. Specifically, the oil first pushes the spherical arc surface 45 and the connected filter rings 46 back, then after the filter rings 46 retract, they push another filter ring 46 back through the limiting protrusion 44, and so on, until multiple filter rings 46 return to their original positions, thereby shortening the filter element 41 to its original length.

[0054] Multiple collection components 8 are arranged in a circumferential array around the axis of the fixed tube 51. The collection components 8 include a collection ring groove 81 and a baffle 82. The collection ring groove 81 is fixedly installed on the side wall where the mounting plate 31 is connected to the filter element 41, and the end of the collection ring groove 81 facing away from the mounting plate 31 is open. The collection ring groove 81 is annular and its axis coincides with the axis of the fixed tube 51. The baffle 82 is rotatably installed on the side wall of the collection ring groove 81 facing away from the mounting plate 31. The baffle 82 is used to block or open the collection ring groove 81. The fixed tube 51 is located inside the collection ring groove 81.

[0055] The baffle 82 is connected to the sleeve part 54 via the linkage assembly 9. When the oil pushes the sealing part 53 and the sleeve part 54 to move and open the connection hole 16, the movement of the sleeve part 54 pushes the baffle 82 to rotate via the linkage assembly 9, thereby opening the collection ring groove 81 for collecting impurities that fall from the filter element 41. When the sealing part 53 and the sleeve part 54 move back to close the connection hole 16 under the elastic force of the elastic member 56, the baffle 82 blocks the collection ring groove 81 via the linkage assembly 9, preventing impurities in the collection ring groove 81 from moving out.

[0056] The linkage assembly 9 includes a linkage rod 91, two linkage blocks 92, and a linkage column 93. The linkage rod 91 is vertically slidably installed on the inner or outer wall of the fixed tube 51. One end of the linkage rod 91 is fixedly connected to the sleeve part 54, and the other end passes through the fixed tube 51 and extends to the inner side of the collection ring groove 81. The two linkage blocks 92 are fixedly installed at intervals along the axis of the fixed tube 51 on the end of the linkage rod 91 near the collection ring groove 81. The linkage column 93 is fixedly installed on the end of the baffle 82 near the fixed tube 51 and is located between the linkage blocks 92. The movement of the linkage rod 91 drives the two linkage blocks 92 to move. The movement of the two linkage blocks 92 pushes the linkage column 93 and the baffle 82 to rotate. The linkage column 93 can move between the two linkage blocks 92, so as to facilitate the movement of the linkage column 93 when the baffle 82 rotates and drives it to rotate. At the same time, the baffle 82 can block or open the collection ring groove 81.

[0057] The working principle of this application embodiment is as follows: The connection hole 16 is opened, allowing the engine oil to pass through the filter hole for filtration. Then, some of the engine oil enters the filter element body 21 and pushes the impurities clogging the filter element body 21 off. The impurities move with the engine oil and enter the collection part 61. The engine oil changes direction and passes through the mounting hole 68 and the guide chamber 67 into the connection hole 16, causing the impurities to remain in the collection part 61. At the same time, the mounting hole 68 is set to pre-filter larger impurities, reducing the pressure of the filter element 41 in filtering impurities and the risk of impurities continuing to clog the filter element body 21. This improves the filtration effect of the filter and ensures that the filter outputs sufficient engine oil for lubrication.

[0058] The engine oil pushes the sealing part 53 and the sleeve part 54 to move, opening the connection hole 16. The engine oil enters the filter element 41 through the connection hole 16, pushing the filter ring 46 to move. The movement of the filter ring 46 causes impurities adhering to the filter ring 46 to fall off. At the same time, the movement of the sleeve part 54 drives the baffle 82 to open the collection ring groove 81, allowing the impurities that have fallen off the filter ring 46 to fall into the collection ring groove 81 for collection. When the sealing part 53 and the sleeve part 54 move back to seal the connection hole 16 under the action of the elastic member 56, the baffle 82 seals the collection ring groove 81. At the same time, the engine oil enters the oil outlet channel 15 through the filter element body 21, pushing multiple filter rings 46 back to their original positions, thereby collecting the impurities on the filter rings 46, further improving the filtration effect of the filter, and ensuring that the filter outputs sufficient engine oil for lubrication.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-stage filtration filter, characterized in that: include: Outer shell (1); The cover (11) is detachably mounted on the outer shell (1) and has an oil inlet (12) and an oil outlet (13) for oil input and output. The filter element assembly (2) is disposed inside the housing (1) and forms an oil inlet channel (14) and an oil outlet channel (15) respectively connected to the oil inlet hole (12) and the oil outlet hole (13). The oil in the oil inlet channel (14) is filtered by the filter element assembly (2) and then output through the oil outlet channel (15) and the oil outlet hole (13) in sequence. A bypass valve (5) is located at the connection between the oil inlet channel (14) and the oil outlet channel (15); The filter assembly (4) is used to filter the oil entering after the bypass valve (5) is opened and then enter the oil outlet channel (15). The filter assembly (4) includes: The filter element (41) is disposed on the filter element assembly (2) and located in the oil outlet channel (15). The filter element (41) has multiple filter holes on the side wall near the filter element assembly (2) and the bypass valve (5) is located inside the filter element (41). A cap (42) is placed on the end of the filter element (41) away from the bypass valve (5) and blocks the filter element (41).

2. The multi-stage filtration filter according to claim 1, characterized in that: The filter element assembly (2) includes: The filter element body (21) is detachably mounted on the mounting part (3), and the mounting part (3) is provided with a connecting hole (16) that connects the oil inlet channel (14) and the oil outlet channel (15). The elastic element (22) presses against the end of the mounting element (3) away from the cover (11) and the outer shell (1) at both ends; The check valve (23) is positioned against the mounting part (3) and the cover (11) under the elastic force of the elastic element (22) and blocks the oil in the oil inlet channel (14) from entering the oil inlet hole (12). The oil inlet channel (14) is formed by the cooperation between the outer side wall of the filter element (21) and the mounting part (3) and the inner side wall of the outer shell (1) and extends to the side of the mounting part (3) away from the cover (11). The oil outlet channel (15) is formed through the inner side of the mounting part (3) and allows the oil to enter the oil outlet channel (15) after being filtered by the filter element (21). The bypass valve (5) and the filter element (41) are set on the mounting part (3). The bypass valve (5) controls the opening or blocking of the connection hole (16).

3. The multi-stage filtration filter according to claim 2, characterized in that: The bypass valve (5) includes: The fixed tube (51) is installed on the mounting part (3) such that the connecting hole (16) is located inside the fixed tube (51) and the fixed tube (51) is connected to the oil inlet channel (14) and the oil outlet channel (15); The sealing block (52) is connected to the fixed tube (51) through the elastic element (56) and presses against the mounting part (3) under the action of elasticity to seal the connection hole (16).

4. The multi-stage filtration filter according to claim 3, characterized in that: The sealing block (52) is provided with a guide component (7), the guide component (7) comprising: Guide tube 1 (71) is installed on the outer casing (1); The second guide tube (72) is set on the sealing block (52) and slides through the first guide tube (71). The second guide tube (72) passes through the connecting hole (16) coaxially and forms an annular flow cavity (73) with the connecting hole (16). The elastic element (22) is positioned on the first guide tube (71) with one end away from the mounting part (3).

5. A multi-stage filtration filter according to claim 3, characterized in that: The mounting component (3) includes a mounting plate (31), a mounting tube (32), and a sealing plate (33). The mounting tube (32) is coaxially mounted on the mounting plate (31). The filter element (21) is sleeved on the mounting tube (32) and abuts against the mounting plate (31) for positioning. The sealing plate (33) is inserted into the mounting tube (32) at the end away from the mounting plate (31). The check valve (23) is pressed against the sealing plate (33) and the cover (11) for positioning under the elastic force of the elastic element (22).

6. A multi-stage filtration filter according to claim 2, characterized in that: It also includes a collection assembly (6) for collecting impurities that fall onto the filter element body (21), the collection assembly (6) comprising: The collection component (61) is detachably installed on the inner wall of the outer shell (1) at the end away from the cover (11) and is open near the oil inlet channel (14); A guide (62) is provided on the mounting (3) and extends to the collecting member (61), the guide (62) being annular and such that the connecting hole (16) is located inside the guide (62); The fixing member (63) is set at the opening of the collecting member (61) and located inside the guide member (62); The positioning component (64) is set on the side wall of the fixing component (63) away from the collecting component (61) and presses against the guide component (62) under the action of elasticity; the fixing component (63), the positioning component (64) and the inner side of the fixing component (63) form a guide chamber (67) that communicates with the connecting hole (16); the fixing component (63) is provided with an installation hole (68) that communicates with the inside of the collecting component (61) and the guide chamber (67) and has a hole diameter larger than the filter hole; the oil in the oil inlet channel (14) enters the collecting component (61) under the action of the guide component (62) and changes its moving direction before entering the guide chamber (67) through the installation hole (68).

7. A multi-stage filtration filter according to claim 1, characterized in that: The filter element (41) is telescopic and is formed by multiple mutually sliding filter rings (46). The outermost filter ring (46) is connected to the mounting part (3), and the innermost filter ring (46) is connected to the cover (42). The filter holes are located on the multiple filter rings (46). The oil from the bypass valve (5) pushes the cover (42) to extend the filter element (41). The oil entering the oil outlet channel (15) through the filter element assembly (2) pushes the filter element (41) to retract and increases the space for oil to flow in the oil outlet channel (15). When the filter element (41) extends or retracts, it can scrape off the impurities adhering to the filter rings (46).

8. A multi-stage filtration filter according to claim 7, characterized in that: The cover (42) is provided with a spherical arc surface (45) protruding toward the oil outlet (13). The spherical arc surface (45) facilitates the movement of the oil through the filter element (21) and causes the filter element (41) to retract.

9. A multi-stage filtration filter according to claim 7, characterized in that: The mounting component (3) is provided with a circumferential array of multiple collection components (8) for collecting impurities that fall onto the filter element (41), the collection components (8) including: A collection ring groove (81) is provided on the mounting plate (31) and is used to collect impurities that fall off the filter element (41); A baffle (82) is rotatably mounted on the collection ring groove (81) and connected to the bypass valve (5) via a linkage assembly (9). When the bypass valve (5) is opened, the linkage assembly (9) pushes the baffle (82) to rotate and open the collection ring groove (81) so that impurities falling from the filter element (41) can pass through for collection. When the bypass valve (5) is closed, the baffle (82) is blocked by the linkage assembly (9) and the impurities in the collection ring groove (81) are prevented from moving out.

10. A multi-stage filtration filter according to claim 9, characterized in that: The linkage component (9) includes: The linkage rod (91) is slidably mounted on the bypass valve (5); Two linkage blocks (92) are set on the linkage rod (91); The linkage column (93) is set on the baffle (82). When the bypass valve (5) is opened or closed, it drives the linkage rod (91) to move. The movement of the linkage rod (91) drives the linkage column (93) and the baffle (82) to rotate through the two linkage blocks (92).

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