An automobile gearbox oil filter

Abstract

The application discloses an oil filter for automobile gearbox, and relates to the technical field of filtration, which comprises a cylindrical oil filter and a cleaning mechanism. The cylindrical oil filter is hollow, is provided with a filter cartridge for filtering oil, and forms chambers indirectly connected by the filter cartridge on both sides of the filter cartridge. The flow path of the oil sequentially passes through the chambers on both sides of the filter cartridge. A bypass valve is movably arranged on the filter cartridge. According to the clogging state of the filter cartridge, the bypass valve has the ability to selectively connect the chambers on both sides of the filter cartridge. The oil inflow surface of the filter cartridge is provided with the cleaning mechanism, the cleaning mechanism is connected with the bypass valve, and the cleaning mechanism has the ability to clean the filter cartridge during movement. When the filter cartridge is not clogged, the bypass valve is in a static closed state. When the filter cartridge is clogged, the bypass valve is opened, and the cleaning mechanism cleans the filter cartridge. When the oil permeation flow of the filter cartridge is greatly reduced or directly clogged, the bypass valve is opened to drive the cleaning mechanism to scrape and clean the clogging substances on the surface of the filter cartridge.

Description

Technical Field

[0001] This invention relates to the field of filtration technology, specifically to an automotive transmission oil filter. Background Technology

[0002] During vehicle operation, the transmission transmits power via a hydraulic system to achieve gear shifting. While the transmission is working, the engine oil within it deteriorates, producing acidic, insoluble substances. These substances, along with impurities in the oil, accumulate and adhere to form sludge. To ensure the cleanliness of the engine oil, an oil filter is needed to remove these impurities. However, over long-term use, sludge can clog the oil filter, reducing the flow and pressure of filtered engine oil to the transmission. Meanwhile, the pressure of the oil flowing to the filter increases, causing delayed, jerky, or even impossible gear shifts. Furthermore, the high-pressure oil circuit on the filter's inlet side can negatively impact the transmission's performance and lifespan. Cleaning a clogged oil filter is troublesome, and prolonged operation under clogged and high-pressure conditions carries the risk of direct damage. Replacement or repair further disrupts the vehicle's normal operation. Summary of the Invention

[0003] In response to the problem mentioned in the background art that filter clogging affects vehicle use, an automotive transmission oil filter is proposed to achieve self-cleaning of the filter, avoid filter clogging affecting normal gear shifting, and prevent the filter from continuously operating under high oil pressure.

[0004] This invention discloses an automotive transmission oil filter, comprising a cylindrical oil filter and a cleaning mechanism. The cylindrical oil filter is hollow inside and has a filter cartridge for filtering oil. Chambers are formed on both sides of the filter cartridge, indirectly connected by the filter cartridge. The oil flows through the chambers on both sides of the filter cartridge sequentially. A bypass valve is movably mounted on the filter cartridge, and the bypass valve has the ability to selectively connect the chambers on both sides of the filter cartridge depending on the blockage state of the filter cartridge. A cleaning mechanism is provided on the oil inflow surface of the filter cartridge, connected to the bypass valve, and moves with the bypass valve, having the ability to clean the filter cartridge during movement. When the filter cartridge is not blocked, the bypass valve is in a stationary closed state; when the filter cartridge is blocked, the bypass valve opens, and the cleaning mechanism cleans the filter cartridge accordingly.

[0005] As a further improvement of the present invention, the cleaning mechanism includes a scraping mechanism and a linkage mechanism; the scraping mechanism is movably fitted onto the surface of the oil inflow filter cartridge; the linkage mechanism is fixedly connected to and driven by the bypass valve, and moves in accordance with the opening and closing of the bypass valve; the linkage mechanism and the scraping mechanism have a transmission connection and cooperation, and when the linkage mechanism moves in accordance with the bypass valve, it has the ability to drive the scraping mechanism to make a staggered displacement movement along the oil inflow surface of the filter cartridge.

[0006] As a further improvement of the present invention, the scraping mechanism includes a plurality of scraping strips and a ring frame; the scraping strips are uniformly spaced and wrapped around the oil inflow surface of the filter cartridge, and all the scraping strips are connected and fixed together by the ring frame; the linkage mechanism includes a linkage cover fixedly connected to the bypass valve and a plurality of differential rods extending from the surface of the linkage cover, the ends of the differential rods being slidably engaged with the scraping strips; the differential rods are driven by the follow-up movement of the linkage cover about the bypass valve to perform translational movement along the axial direction of the filter cartridge; the sliding engagement between the scraping strips and the differential rods drives the axial movement of the differential rods to be converted into lateral deflection motion, so that the scraping strips perform staggered rotational movement on the oil inflow surface of the filter cartridge.

[0007] As a further improvement of the present invention, the scraper extends in a spiral shape and always maintains contact with the oil inflow surface of the filter cartridge; a differential groove is provided at the end of the scraper along the spiral extension direction, and the differential rod is at a spatially staggered angle with the end of the scraper and extends through the differential groove; the differential rod is provided with a pair of abutting parts with a width greater than the width of the differential groove, which slide against the two end faces of the scraper respectively.

[0008] As a further improvement of the present invention, an abutment ring is provided around the oil inflow surface of the filter cartridge, and the abutment ring is in sliding contact with the ring frame to limit the relative movement of the scraping mechanism along the axial direction of the filter cartridge.

[0009] As a further improvement of the present invention, the linkage cover is located between the filter cartridge end face with the bypass valve and the wall of the cylindrical oil filter. The outer periphery of the linkage cover is curved inward and gradually converges towards the wall of the cylindrical oil filter. A drain port that can be selectively opened is provided on the wall of the cylindrical oil filter corresponding to the converged protruding end.

[0010] As a further improvement of the present invention, a collection hole is provided on the arc-shaped curved surface of the linkage cover, and the collection hole is spaced at intervals corresponding to the contact points between the scraping strip and the oil inflow surface of the filter cartridge.

[0011] As a further improvement of the present invention, a bypass valve is disposed on the end face of the filter cartridge. The bypass valve has the ability to reciprocate along the axial direction of the filter cartridge to selectively connect the chambers on both sides of the filter cartridge.

[0012] As a further improvement of the present invention, the filter cartridge includes a filter layer for filtration and an overflow layer for collecting liquid flow, the filter layer being located on the oil inflow surface of the filter cartridge and the overflow layer being located on the oil outflow surface of the filter cartridge.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The automotive transmission oil filter of the present invention has a cleaning mechanism inside the cylindrical oil filter that is linked to the bypass valve. When the oil flow rate of the filter cartridge is greatly reduced or directly blocked, the bypass valve opens to drive the cleaning mechanism to scrape and clean the blockage on the surface of the filter cartridge. After the bypass valve closes, the filter cartridge regains its ability to filter oil, allowing the oil to pass through the filter cartridge smoothly, preventing the oil pressure from rising further, and protecting the oil filter and related components in the oil circuit.

[0015] 2. This invention has the function of collecting and storing blockages in the oil filter. The scraping strip of the cleaning mechanism is spirally coiled around the oil inflow surface of the filter cartridge. When scraping and cleaning the blockages, the scraped blockages will be guided by the spiral scraping strip and fall towards the linkage cover. The blockages will then be guided by the arc-shaped concave linkage cover, pass through the collection hole, and collect in the interlayer between the linkage cover and the cylindrical oil filter. By opening the drain port of the filter cartridge, the collected blockages can be directly discharged, making it more convenient for the operator to clean the inside of the oil filter. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the oil filter of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the cylindrical oil filter of the present invention after half-section.

[0018] Figure 3 This is a full cross-sectional structural diagram of the oil filter of the present invention in normal filtration state.

[0019] Figure 4 This is a schematic diagram of the internal structure of the cylindrical oil filter and the filter cartridge of the present invention after half-section.

[0020] Figure 5 This is a schematic diagram of the oil flow direction when the oil filter of the present invention is in normal filtration state;

[0021] Figure 6 This is a schematic diagram showing the positional relationship between the cleaning mechanism and the filter cartridge during normal filtration of the oil filter of the present invention;

[0022] Figure 7 This is a schematic diagram showing the oil flow direction when the cleaning mechanism operates in the case of a clogged oil filter according to the present invention.

[0023] Figure 8 This is a schematic diagram showing the positional relationship between the cleaning mechanism and the filter cartridge of the oil filter of the present invention during operation;

[0024] Figure 9 This is a schematic diagram of the scraping strip movement process of the oil filter of the present invention;

[0025] 1. Cylindrical oil filter; 10. End face; 101. Threaded connecting pipe; 102. Liquid inlet hole; 103. Annular liquid inlet separator; 11. Filter cartridge; 111. Filter layer; 1111. Abutment ring; 112. Overflow layer; 12. Bypass valve; 13. Drain outlet; 2. Cleaning mechanism; 21. Scraping mechanism; 211. Scraping strip; 2111. Differential groove; 212. Ring frame; 22. Linkage mechanism; 221. Linkage cover; 2211. Collection hole; 222. Differential rod; 2221. Abutment part. Detailed Implementation

[0026] Specific Implementation Example 1: Please refer to the appendix Figure 1 -Appendix Figure 9

[0027] An automotive transmission oil filter includes a cylindrical oil filter 1 and a cleaning mechanism 2.

[0028] The cylindrical oil filter 1 is a hollow cylindrical body, such as... Figure 2 and Figure 3 As shown, at the center of the end face 10 of the cylindrical oil filter 1, a threaded connection port is formed to connect to the inside of the cylinder. The threaded connection port at the center extends into the cylinder to form a threaded connection pipe 101. Eight liquid inlet holes 102 connecting to the inside of the cylinder are evenly spaced around the outer periphery of the threaded connection port on the end face 10. A sealing ring that protrudes from the end face 10 is embedded on the outer surface of the end face 10 where the liquid inlet holes 102 are located.

[0029] The cylindrical oil filter 1 has a coaxially arranged hollow cylindrical filter cartridge 11 inside. The filter cartridge 11 includes two coaxially stacked mesh layers, an outer mesh layer with a larger diameter (the outer layer) serving as the filter layer 111 for filtering the oil; and an inner mesh layer with a smaller diameter (the inner layer) serving as the overflow layer 112 for supporting the outer filter layer and allowing the filtered oil to collect into the internal cavity of the filter cartridge 11. The filter cartridge 11 divides the cylindrical hollow interior of the cylindrical oil filter 1 into two overlapping cavities. Figure 2 and Figure 3As shown, the outer diameter of the filter cartridge 11 is smaller than the diameter of the cylindrical oil filter 1. One end face of the filter cartridge 11 is connected and fixed to the end face 10 of the cylindrical oil filter 1, which has a threaded connection port. The diameter of the end wall of the filter cartridge 11 is between the threaded connection pipe 101 and the inlet hole 102. The threaded connection pipe 101 extends into the interior of the filter cartridge 11, allowing the interior of the filter cartridge 11 to communicate directly with the exterior of the cylindrical oil filter 1. The cavity formed by the outer side of the filter cartridge 11 and the inner side of the cylindrical oil filter 1 is connected to the exterior of the cylindrical oil filter 1 through eight inlet holes 102. During filtration, unfiltered oil flows from the eight inlet holes 102 into the cavity formed by the outer side of the filter cartridge 11 and the inner side of the cylindrical oil filter 1, passes through the filter cartridge 11, enters the interior of the filter cartridge 11, and flows out from the threaded connection pipe 101, forming an oil filtration circuit. An annular inlet separator 103 made of elastic material is provided above the outlet of the inlet hole 102 inside the cylindrical oil filter 1. The inner ring of the annular inlet separator 103 seals against the outer surface of the connection and fixing point between the filter cylinder 11 and the cylindrical oil filter 1. The ring body of the annular inlet separator 103 extends outward. When the annular inlet separator 103 is not subjected to external force (when the oil pressure on both sides of the annular inlet separator 103 is balanced), the outer end of the separator seals against the inner wall of the end face 10 of the cylindrical oil filter 1 with the inlet hole 102. The annular inlet separator 103 blocks and separates the outer cavity of the filter cartridge 11 from the external communication path of the cylindrical oil filter 1. When the oil pressure on the side of the annular inlet separator 103 with the inlet hole 102 is greater than the internal oil pressure of the cylindrical oil filter 1, the annular inlet separator 103 undergoes elastic deformation and bends towards the inside of the cylindrical oil filter 1, reconnecting the outer cavity of the filter cartridge 11 with the outside of the cylindrical oil filter 1. Figure 5 As shown, the oil outside the cylindrical oil filter 1 can flow into the cavity formed by the outer side of the filter cartridge 11 and the inner side of the cylindrical oil filter 1. After being filtered by the filter cartridge 11, the oil enters the interior of the filter cartridge 11 and finally flows out from the threaded connecting pipe 101. The filter layer 111 has an abutment ring 1111 fixedly provided on the outer peripheral wall near the annular inlet separator 103. The abutment ring 1111 is made of magnetic material and forms an outwardly convex annular step on the outer peripheral wall of the filter layer 111.

[0030] The end face 10 of the cylindrical oil filter 1 has an arc-shaped surface on both sides. A drain port 13, connecting to the outside, is located at the center of the arc-shaped surface. A screw plug is screwed onto the outside of the drain port 13 and sealed with a gasket. A bypass hole is located at the center of the opposite end face of the filter cartridge 11 and the cylindrical oil filter 1. Inside the filter cartridge 11, near the bypass hole, a truncated cone is located at its center. The truncated cone is fixedly connected to the inner wall of the overflow layer 112 of the filter cartridge 11 via a connecting column. A bypass valve 12 is installed between the truncated cone and the end face where the bypass hole is located. A spring is provided between the bypass valve 12 and the truncated cone. The bypass valve 12, under the spring force, abuts against and seals the bypass hole. When the filter layer 111 of the filter cartridge 11 becomes clogged with dirt, the oil flows out according to… Figure 5The flow rate discharged after filtration by filter cartridge 11 is reduced, or the oil cannot be discharged according to the method shown. Figure 5 As shown, the oil pressure in the cavity formed by the outer side of the filter cartridge 11 and the inner side of the cylindrical oil filter 1 continuously increases until the pressure generated by the oil pressure on the end face of the bypass valve 12 blocking the bypass hole is greater than the spring force on the bypass valve 12. The bypass valve 12 will then retract into the filter cartridge 11 along the axial direction, so that the cavity inside the filter cartridge 11 and the cavity outside the filter cartridge 11 are directly connected, and the high pressure oil in the cavity outside the filter cartridge 11 is depressurized.

[0031] The cleaning mechanism 2 is located in the cavity formed by the outer side of the filter cartridge 11 and the inner side of the cylindrical oil filter 1, and includes a scraping mechanism 21 and a linkage mechanism 22.

[0032] The scraping mechanism 21 is made of magnetic material and has the ability to attract magnetic impurities in the oil. It includes ten scraping strips 211, such as... Figure 4 As shown, ten scraping strips 211 are evenly spaced and arranged around the outer periphery of the filter layer 111 of the filter cartridge 11. Each scraping strip 211 has a rectangular cross-section and spirally coils around the outer periphery of the filter layer 111. The end face of the scraping strip 211 near the filter layer 111 always maintains sliding contact with the outer periphery of the filter layer 111. At the end of the scraping strip 211 near the bypass valve 12, a differential groove 2111 extending in the spiral coiling direction of the scraping strip 211 is formed in the middle of the scraping strip 211. Ring frames 212 are provided at the upper and lower ends of each scraping strip 211, and the ring frames 212 are fixedly connected to the ends of all ten scraping strips 211. Both ring frames 212 are coaxially positioned with the filter cartridge 11. The ring frame 212 near the end face 10 of the cylindrical oil filter 1 slides against the outer convex step surface of the abutment ring 1111, and both the ring frame 212 and the abutment ring 1111 are made of magnetic material, attracting each other to maintain the abutment and fit.

[0033] The linkage mechanism 22 includes a linkage cover 221 and a differential rod 222. The linkage cover 221 is disposed between the arc surface of the cylindrical oil filter 1 and the end face of the filter cylinder 11 where the bypass valve 12 is located. The linkage cover 221 is arc-shaped, and its outer periphery gradually tapers towards the center in an arc-shaped curved structure. At the center of the curve, it is tapered and convex, with the tapered and convex central part facing the drain port 13 and forming a spaced interlayer. The outer ring of the linkage cover 221 has collection holes 2211 around the center. The collection holes 2211 are evenly spaced and radially distributed on the surface of the linkage cover 221. The ends of the collection holes 2211 are spaced along the axis of the filter cylinder 11 and have differential grooves 2111 at intervals corresponding to the scraping strips 211. A connecting plate extends from the center surface of the linkage cover 221 adjacent to the bypass valve 12. The connecting plate is fixedly connected to the valve body of the bypass valve 12 and moves in linkage with the extension and retraction of the bypass valve 12. Ten differential rods 222 extend from the outer periphery of the linkage cover 221 toward the differential groove 2111 of the scraping strip 211. All ten differential rods 222 are spatially parallel to the central axis of the filter cartridge 11 and extend into the differential groove 2111. The portion of the differential rod 222 with the portion of the scraping strip 211 having the differential groove 2111 forms an acute spatial angle. Fixed abutment portions 2221 are provided on the rods of the differential rods 222 located on both sides of the scraping strip 211. The abutment portions 2221 are spherical with a diameter larger than the width of the differential groove 2111. The abutment portion 2221 on each differential rod 222 maintains sliding contact with the surface of the adjacent scraping strip 211.

[0034] Cleaning action principle:

[0035] like Figures 6-9 As shown, when the outer surface of the filter layer 111 of the filter cartridge 11 is blocked, the bypass valve 12 opens under oil pressure and retracts into the filter cartridge 11. The linkage cover 221, which is fixedly connected to the bypass valve 12, moves closer to the filter cartridge 11 (e.g., ...). Figure 9 As shown in Figure 221(a) moving to Figure 221(b), the differential rod 222 is driven by the linkage cover 221 and simultaneously extends into the differential groove 2111 of the scraper strip 211. The abutment portion 2221 of the differential rod 222 near the linkage cover 221 abuts against the surface of the scraper strip 211. The abutment direction of the two has a spatial angle with the axial direction of the differential rod 222, so that part of the force along the axial direction of the differential rod 222 is converted into a lateral deflection component force deflected towards the inclined surface of the scraper strip 211. The force applied to the scraper strip 211 along the axial direction of the differential rod 222 is canceled by the abutment of the ring frame 212 and the abutment ring 1111. The scraper strip 211 is pushed by the lateral deflection component force and rotates relative to the filter cylinder 11 with its end in contact with the filter layer 111 (e.g., Figure 9As shown in Figure 211(a) moving to position 211(b), during this relative differential rotational motion, the blockages on the surface of the filter layer 111 are scraped off by the scraper strip 211, and magnetic impurities on it are adsorbed, achieving an automatic cleaning effect in the blocked state. After the surface of the filter layer 111 is cleaned, the bypass valve 12 closes, and the oil flow is restored. Figure 5 In the flow path, the contact portion 2221 on the differential rod 222, away from the linkage cover 221, abuts against the surface of the scraper strip 211, driving the differential strip 211 to rotate in the opposite direction to the initial position. Furthermore, the spiral structure of the scraper strip 211 guides and pushes the scraped dirt along the axial direction of the filter cartridge 11. Non-magnetically adsorbed blockages move along the spiral extension direction of the scraper strip 211 until they fall from the side with the differential groove 2111 and pass through the collection hole 2211 of the linkage cover 221, entering the sandwich space formed by the center of the linkage cover 221 and the arc of the cylindrical oil filter 1, forming a collection. Simply opening the screw plug of the drain port 13 can drain the collected blockages.

[0036] The above description is merely a preferred embodiment of the present invention and is only intended to illustrate the principles and effects of the present invention. It is not intended to limit the present invention. All variations, modifications, and substitutions within the spirit and principles of this design are within the protection scope of the present invention.

Claims

1. An automotive transmission oil filter, characterized in that: Includes a cylindrical oil filter (1) and a cleaning mechanism (2); The cylindrical oil filter (1) is hollow inside and has a filter cartridge (11) for filtering oil. The filter cartridge (11) forms chambers on both sides of the filter cartridge (11) that are indirectly connected. The flow path of the oil passes through the chambers on both sides of the filter cartridge (11) in sequence. A bypass valve (12) is movably installed on the filter cartridge (11). Depending on the blockage state of the filter cartridge (11), the bypass valve (12) has the ability to selectively connect the chambers on both sides of the filter cartridge (11). A cleaning mechanism (2) is provided on the oil inflow surface of the filter cartridge (11). The cleaning mechanism (2) is connected to the bypass valve (12) and moves with the bypass valve (12), thus having the ability to clean the filter cartridge (11) during the movement. When the filter cartridge (11) is not blocked, the bypass valve (12) is in a static closed state; when the filter cartridge (11) is blocked, the bypass valve (12) is opened and the cleaning mechanism (2) cleans the filter cartridge (11) accordingly. The cleaning mechanism (2) includes a scraping mechanism (21) and a linkage mechanism (22); the scraping mechanism (21) is movably fitted onto the surface of the oil inflow filter cartridge (11); the linkage mechanism (22) is fixedly connected to and driven by the bypass valve (12), and moves in sync with the opening and closing of the bypass valve (12); the linkage mechanism (22) and the scraping mechanism (21) have a transmission connection and when the linkage mechanism (22) moves in sync with the bypass valve (12), it has the ability to drive the scraping mechanism (21) to make a staggered displacement movement along the oil inflow surface of the filter cartridge (11); The scraping mechanism (21) includes several scraping strips (211) and a ring frame (212); the scraping strips (211) are evenly spaced around the oil inflow surface of the filter cartridge (11), and all the scraping strips (211) are connected and fixed together by the ring frame (212); the linkage mechanism (22) includes a linkage cover (221) fixedly connected to the bypass valve (12) and several differential rods (222) extending from the surface of the linkage cover (221), the differential rods (222) The end of the scraper (211) is slidably connected to the scraper (211); the differential rod (222) moves along the axial direction of the filter cartridge (11) under the following motion of the linkage cover (221) about the bypass valve (12); the sliding engagement between the scraper (211) and the differential rod (222) drives the differential rod (222) to convert the axial motion of the differential rod (222) into a lateral deflection motion, so that the scraper (211) moves around the oil inflow surface of the filter cartridge (11).

2. The automotive transmission oil filter according to claim 1, characterized in that: The scraping strip (211) extends in a spiral shape and always keeps in contact with the oil inflow surface of the filter cartridge (11); the scraping strip (211) has a differential groove (2111) at the end along the spiral extension direction, and the differential rod (222) forms a spatial staggered angle with the end of the scraping strip (211) and extends through the differential groove (2111); the differential rod (222) has a pair of abutting parts (2221) with a width greater than the width of the differential groove (2111), which slide against the two end faces of the scraping strip (211) respectively.

3. The automotive transmission oil filter according to claim 1, characterized in that: The oil inflow surface of the filter cartridge (11) is surrounded by an abutment ring (1111), which slides against the ring frame (212) to limit the relative movement of the scraping mechanism (21) along the axial direction of the filter cartridge (11).

4. The automotive transmission oil filter according to claim 1, characterized in that: The linkage cover (221) is located between the end face of the filter cartridge (11) equipped with the bypass valve (12) and the wall of the cylindrical oil filter (1). The outer periphery of the linkage cover (221) is curved inward and gradually closes and protrudes towards the wall of the cylindrical oil filter (1). A drain port (13) that can be selectively opened is provided on the wall of the cylindrical oil filter (1) corresponding to the closed protruding end.

5. The automotive transmission oil filter according to claim 4, characterized in that: A collection hole (2211) is provided on the curved surface of the linkage cover (221). The collection hole (2211) is spaced at the point where the oil flows into the filter cartridge (11) and the scraping strip (211) are in contact with each other.

6. The automotive transmission oil filter according to claim 1, characterized in that: A bypass valve (12) is provided on the end face of the filter cartridge (11). The bypass valve (12) has the ability to move back and forth along the axial direction of the filter cartridge (11) to selectively connect the chambers on both sides of the filter cartridge (11).

7. The automotive transmission oil filter according to claim 1, characterized in that: The filter cartridge (11) includes a filter layer (111) for filtration and an overflow layer (112) for collecting liquid flow. The filter layer (111) is located on the oil inflow surface of the filter cartridge (11), and the overflow layer (112) is located on the oil outflow surface of the filter cartridge (11).

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