Oil filter

Abstract

One end of a spring of a bypass valve of the engine oil filter is connected with a valve cover, the other end of the spring of the bypass valve is connected to the bottom face of a shell, a hollow filter screen ring is fixedly arranged above a valve port in a sleeved mode, the valve cover is tightly attached to the inner wall of the filter screen ring when passing through the filter screen ring, and the top end of the filter screen ring is lower than the maximum stroke height of the valve cover. The filter screen ring forms a buffering mechanism for opening the bypass valve, engine oil needs to penetrate through the filter screen ring to enter the center pipeline within a section of stroke when the valve cover starts to move upwards, the engine oil cannot be filtered immediately, and the situation that unfiltered engine oil enters the engine at will when too much engine oil is not needed immediately can be avoided. When a large amount of engine oil is actually needed to be supplied to the engine, the valve cover pulls the spring to continue to rise to the top end of the ultra-filtering net ring under the pressure effect, the engine oil is not blocked, rapid supply of the engine oil is not affected, and therefore the engine is buffered and protected on the premise that normal work of the engine oil filter is not affected.

Description

Technical Field

[0001] This utility model relates to the technical field of filters, and in particular to an oil filter. Background Technology

[0002] An oil filter is an essential component of a car engine. Its main function is to filter impurities and contaminants from the engine oil, maintaining its cleanliness. An oil filter typically consists of a filter element and a housing. The filter element is the key component; when engine oil flows through it, the filter paper blocks dust, metal fragments, and other impurities from the oil, preventing them from entering the engine. This protects various engine components, prevents wear and corrosion, and extends the engine's lifespan.

[0003] For traditional oil filters, when the oil is cold, too viscous, or under high engine load due to sudden acceleration and heavy throttle input, the oil may not easily pass through the filter element with its numerous pleated filter paper cartridges. In such cases, the bypass valve at the bottom of the oil filter opens under high pressure, allowing the oil to bypass the filter paper cartridges and enter the central pipe directly, maintaining oil supply and preventing engine damage due to insufficient oil. However, traditional bypass valves only have two states: open and closed. Often, if the oil flow is slow, the bypass valve will open completely, and all oil passing through it will be unfiltered. Not all of these situations require a large amount of oil to enter the engine immediately. For some drivers with poor driving habits, this can happen frequently, ultimately failing to effectively protect the engine, especially with oil filters that have bypass valve opening pressure thresholds set too low.

[0004] Therefore, it is necessary to propose new improvement plans to address the above problems. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an oil filter to solve the above problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides an oil filter, which includes a housing, a top cover, a filter element, and a bypass valve.

[0008] The opening at the top of the outer shell forms a cylindrical receiving space;

[0009] The top cover has a central pipe opening and oil inlet holes arranged around the central pipe opening. The top cover covers the outer shell and covers the openings of the outer shell.

[0010] The filter core is accommodated in the shell, and comprises an upper mounting plate, a filter paper cylinder and a lower mounting plate. The filter paper cylinder is fixed between the upper mounting plate and the lower mounting plate. A central shaft opening of the filter paper cylinder forms a central pipeline in communication with the central pipeline opening, so that the engine oil entering from the oil inlet hole can pass through the filter paper cylinder and enter the central pipeline, and then flow out from the central pipeline opening on the top cover.

[0011] The bypass valve comprises a valve cover and a spring. One end of the spring is connected to the valve cover, and the other end is connected to the bottom surface of the shell. The lower mounting plate is provided with a valve opening. The valve cover is blocked at the valve opening and can move upward from the valve opening under the action of oil pressure, so that the oil can flow into the central pipeline from between the valve cover and the valve opening. A hollow filter screen ring is fixed above the valve opening. When the valve cover moves, the central shaft inside the filter screen ring is located on the central shaft. When the valve cover passes through the filter screen ring, the valve cover is close to the inner wall of the filter screen ring. The top end of the filter screen ring is lower than the maximum stroke height of the valve cover pulling the spring to move upward.

[0012] Preferably, a valve filter paper and a fixed screen ring are sequentially sleeved on the filter screen ring. The valve filter paper is clamped between the filter screen ring and the fixed screen ring.

[0013] Preferably, the bottom outer periphery of the filter screen ring is outwardly expanded to form an outwardly extended edge, and the outwardly extended edge is adhesively fixed to the bottom of the lower mounting plate.

[0014] Preferably, the distance between the valve cover and the lower mounting plate when the valve cover pulls the spring to move upward to the maximum stroke height is equal to twice the distance between the top end of the filter screen ring and the lower mounting plate.

[0015] Preferably, a positioning frame is further fixed above the valve opening of the lower mounting plate. The positioning frame is sleeved on the outer periphery of the filter screen ring. The positioning frame is an open hollow cylindrical structure. A limiting baffle is arranged in the positioning frame to limit the maximum stroke height of the upward movement of the valve cover.

[0016] Preferably, a plurality of bearing columns are connected to the bottom of the lower mounting plate. The bottom ends of the bearing columns are fixed in the fixed grooves formed in the bottom surface of the shell. The bearing columns are used to support the lower mounting plate, so that the lower mounting plate is spaced apart from the bottom surface of the shell to form an oil inlet space.

[0017] Preferably, the diameter of the central pipeline is 23mm-27mm, and the diameter of the valve opening is 18mm-23.8mm.

[0018] Preferably, a plurality of filter paper mounting grooves are formed on the lower mounting plate. The filter paper mounting grooves are circumferentially arranged around the center of the lower mounting plate and extend in the radial direction of the lower mounting plate. The filter paper mounting grooves are used to clamp the filter paper folds on the filter paper cylinder.

[0019] Preferably, the oil filter further comprises a check gasket attached to the bottom of the top cover.

[0020] The technical effects achieved by the technical scheme of the utility model mainly include:

[0021] Based on the above-mentioned oil filter, the filter ring is sleeved above the valve port to provide a buffering mechanism for the opening of the bypass valve. When the valve cover starts to move upward under the action of oil pressure, the filter ring is sleeved outside the valve cover within a stroke after the valve cover starts to move. The oil needs to pass through the filter ring to enter the central pipeline, and the oil will not immediately enter the central pipeline without filtration. This can avoid the situation that all unfiltered oil is directly and randomly entered into the engine during the period of low temperature, too viscous oil or sudden start of deep throttle, etc. When a large amount of oil is really needed to supply the engine immediately, the valve cover will pull the spring to continue to rise until the top end of the filter ring is exceeded. The oil flowing beyond the top end of the filter ring will not be blocked, and the rapid supply of oil will not be affected at this time. Therefore, the buffering protection of the engine is achieved without affecting the normal operation of the oil filter, which is especially suitable for the oil filter with a too low opening pressure threshold of the bypass valve. Moreover, the structure is simple, easy to realize, and the required modification cost is small. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure split view of the oil filter provided by the utility model;

[0023] Figure 2 The schematic view of the bypass valve in the valve port closed state;

[0024] Figure 3 The schematic view of the bypass valve located in the filter ring in the valve port open state;

[0025] Figure 4 The schematic view of the bypass valve moving above the filter ring in the valve port open state;

[0026] Figure 5 The schematic view of the filter ring in the oil filter corresponding to one of the embodiments;

[0027] Figure 6 The schematic view of the lower mounting plate in the oil filter and the structure connected thereto.

[0028] Each reference sign in the above-mentioned drawings is as follows:

[0029] Housing 1, bottom surface 1a of the housing;

[0030] Top cover 2, central pipeline port 201, oil inlet hole 202;

[0031] Filter core 3, upper mounting plate 31, filter paper cylinder 32, central pipeline 320, lower mounting plate 33, valve port 330, positioning frame 331, limiting baffle 3311, bearing column 332, filter paper mounting groove 333;

[0032] Bypass valve 4, valve cover 41, spring 42;

[0033] Filter screen ring 5, outer extension edge 51, valve filter paper 52, fixed screen ring 53;

[0034] Check gasket 6. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the utility model more clear, the specific implementation of the utility model is described in detail below with reference to the drawings. The examples of these preferred implementations are illustrated in the drawings. The embodiments of the utility model shown in the drawings and described according to the drawings are merely exemplary, and the utility model is not limited to these embodiments.

[0036] In order to avoid obscuring the utility model due to unnecessary details, only the structures and / or processing steps closely related to the scheme according to the utility model are shown in the drawings, and other details that are not closely related are omitted.

[0037] As Figures 1 to 4 shown, the utility model embodiment provides a machine oil filter, which comprises a shell 1, a top cover 2, a filter core 3 and a bypass valve 4.

[0038] The upper opening of the shell 1 constitutes a cylindrical accommodating space;

[0039] The top cover 2 is provided with a central pipeline port 201 and an oil inlet hole 202 arranged around the central pipeline port 201, and the top cover 2 covers the shell 1 to shield the opening of the shell 1;

[0040] The filter core 3 is accommodated in the shell 1, and the filter core 3 comprises an upper mounting plate 31, a filter paper cylinder 32 and a lower mounting plate 33, the filter paper cylinder 32 is fixed between the upper mounting plate 31 and the lower mounting plate 33, and the central axis opening of the filter paper cylinder 32 constitutes a central pipeline 320 in communication with the central pipeline port 201, so that the machine oil entering from the oil inlet hole 202 can pass through the filter paper cylinder 32 and enter the central pipeline 320, and then flow out from the central pipeline port 201 on the top cover 2;

[0041] The bypass valve 4 comprises a valve cover 41 and a spring 42, one end of the spring 42 is connected to the valve cover 41, and the other end is connected to the bottom surface 1a of the shell 1, the lower mounting plate 33 is provided with a valve port 330, the valve cover 41 is blocked at the valve port 330 and can be moved upward from the valve port 330 under the action of oil pressure, so that the oil can flow into the central pipe 320 from between the valve cover 41 and the valve port 330, the valve port 330 is fixedly sleeved with a hollow filter screen ring 5, the valve cover 41 is located on the central axis inside the filter screen ring 5 when moving, and the valve cover 41 abuts against the inner wall of the filter screen ring 5 when passing through the filter screen ring 5, and the top end of the filter screen ring 5 is lower than the maximum stroke height of the valve cover 41 pulling the spring 42 upward.

[0042] In the oil filter, when the oil can normally pass through the filter paper cylinder 32 to enter the central pipe 320, the valve cover 41 is located at the valve port 330 and blocks the valve port 330, at this time the spring 42 is in the original length balance state, and the oil will not flow into the central pipe 320 through the valve port 330; when the oil has difficulty passing through the filter paper cylinder 32, the valve cover 41 will start to move upward under the action of oil pressure, a gap will appear between the valve cover 41 and the valve port 330, and the spring 42 will be pulled, because the filter screen ring 5 is sleeved outside the valve cover 41 in a stroke after the valve cover 41 starts to move upward, the oil needs to pass through the filter screen ring 5 to enter the central pipe 320, and the oil will not immediately enter the central pipe 320 without filtering, which provides a buffer stage for the complete opening of the bypass valve 4; when the pressure acting on the valve cover 41 is large enough, and a large amount of oil is indeed immediately needed to supply the engine, the valve cover 41 will pull the spring 42 to rise above the top end of the filter screen ring 5, and the oil flowing above the top end of the filter screen ring 5 will not be blocked, at this time the rapid supply of oil is not affected. Based on the above-mentioned setting of the filter screen ring 5, it can be avoided that during a period of time when the oil is in a low temperature state, the oil is too viscous or suddenly starts and deeply steps on the accelerator, and too much oil is often not immediately needed, and it can be avoided that the unfiltered oil enters at will, which plays a buffering protection role on the engine for some oil filters with a too low opening pressure threshold of the bypass valve. Moreover, as the filter paper cylinder 32 cannot normally pass through the oil for a long time with the use of the oil filter for a long time, the above-mentioned filter screen ring 5 can also delay the damage to the engine.

[0043] As Figure 5As shown, as an embodiment of the filter ring 5, a valve filter paper 52 and a fixed ring 53 are sequentially sleeved on the filter ring 5, the valve filter paper 52 is clamped between the filter ring 5 and the fixed ring 53, and the fixed ring 53 needs to be consistent with the distribution of the mesh holes of the filter ring 5. Since the filter ring 5 is generally temporarily used in the case of a short burst of engine oil passing through the filter paper cylinder 32, the valve filter paper 52 is much thinner than the filter paper cylinder 32, and the engine oil relatively having more folded surfaces is more easily passed through the valve filter paper 52, and the flow rate is less affected.

[0044] Exemplarily, an outer extension edge 51 is formed on the bottom outer periphery of the filter ring 5, and the outer extension edge 51 is adhesively fixed on the bottom of the lower mounting plate 33, facilitating the mounting and fixing of the filter ring 5. Of course, the mounting mode of the filter ring 5 still has many embodiments, which are not limited here.

[0045] In this embodiment, the valve cover 41 is pulled up to the maximum stroke height, and the distance between the valve cover 41 and the lower mounting plate 33 is equal to twice the distance between the top end of the filter ring 5 and the lower mounting plate 33.

[0046] In combination Figure 1 and Figure 6 As shown, in order to limit the movement path of the valve cover 41 and facilitate the sleeving of the filter paper cylinder 32, the lower mounting plate 33 is further provided with a positioning frame 331 above the valve port 330, the positioning frame 331 is sleeved on the outer periphery of the filter ring 5, the positioning frame 331 is an open hollow cylindrical structure, and a limiting baffle 3311 is arranged in the positioning frame 331 for limiting the maximum stroke height of the upward movement of the valve cover 41. The positioning frame 331 is made of plastic, and a protruding structure abutting against the filter paper cylinder 32 can be arranged on the positioning frame 331 to increase the friction between the positioning frame 331 and the filter paper cylinder 32.

[0047] When the valve cover 41 moves, the valve port 330 needs to be fixed, and there needs to be a large enough space between the lower mounting plate 33 and the bottom surface 1a of the shell 1 for the engine oil to pass through to enter the valve port 330. Therefore, in this embodiment, the bottom of the lower mounting plate 33 is connected with a plurality of bearing columns 332, the bottom end of the bearing column 332 is fixed in the fixed groove opened in the bottom surface 1a of the shell 1, and the bearing column 332 is used to support the lower mounting plate 33, so that the lower mounting plate 33 is spaced apart from the bottom surface 1a of the shell 1 to form an oil inlet space.

[0048] Exemplarily, the diameter of the center pipeline 320 is 23mm-27mm, and the diameter of the valve port 330 is 18mm-23.8mm.

[0049] To further fix the filter paper cylinder 32, a plurality of filter paper mounting grooves 333 are arranged on the lower mounting plate 33 in a circumferential direction around the center of the lower mounting plate 33, each filter paper mounting groove 333 extends in a radial direction of the lower mounting plate 33 and is used to clamp the folded surface of the filter paper cylinder 32. The filter paper mounting grooves 333 are used to limit the folded surfaces of the filter paper cylinder 32 and facilitate uniform arrangement of the folded surfaces of the filter paper cylinder 32.

[0050] Further, the oil filter further comprises a check gasket 6 attached to the bottom of the top cover 2. The check gasket 6 can block the oil inlet hole 202 by its own elastic force, so as to avoid the entry of excess oil under the action of no oil pressure.

[0051] It should be noted that the relational terms herein such as first and second and the like are used only to differentiate one entity or action from another, and do not necessarily require or imply that any such actual relationship or order exists between or among the entities or actions. Also, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0052] The above description is merely one specific implementation of the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as falling within the scope of protection of the present application.

Claims

1. An oil filter, characterized in that, include: The outer shell (1) has an opening at the top, forming a cylindrical receiving space; Top cover (2), the top cover (2) has a central pipe opening (201) and an oil inlet hole (202) arranged around the central pipe opening (201), the top cover (2) covers the outer shell (1) and covers the opening of the outer shell (1); The filter element (3) is housed in the outer casing (1). The filter element (3) includes an upper mounting plate (31), a filter paper cylinder (32), and a lower mounting plate (33). The filter paper cylinder (32) is fixed between the upper mounting plate (31) and the lower mounting plate (33). The central shaft opening of the filter paper cylinder (32) forms a central pipe (320) that communicates with the central pipe opening (201). This allows the oil entering from the oil inlet (202) to pass through the filter paper cylinder (32) into the central pipe (320) and flow out from the central pipe opening (201) on the top cover (2). A bypass valve (4) includes a valve cover (41) and a spring (42). One end of the spring (42) is connected to the valve cover (41), and the other end is connected to the bottom surface (1a) of the housing (1). The lower mounting plate (33) has a valve port (330). The valve cover (41) seals the valve port (330) and can move upward from the valve port (330) under the action of oil pressure, allowing oil to flow from the valve cover (41). 41) The fluid flows into the central pipe (320) between the valve port (330) and the valve port (330). A hollow filter ring (5) is fixedly fitted above the valve port (330). When the valve cover (41) moves, it is located on the central axis inside the filter ring (5). When the valve cover (41) passes through the filter ring (5), it is in close contact with the inner wall of the filter ring (5). The top of the filter ring (5) is lower than the maximum stroke height of the valve cover (41) pulling spring (42) moving upward.

2. The oil filter according to claim 1, characterized in that, A valve filter paper (52) and a fixing mesh ring (53) are sequentially fitted on the filter ring (5), and the valve filter paper (52) is fixed between the filter ring (5) and the fixing mesh ring (53).

3. The oil filter according to claim 1, characterized in that, The bottom outer periphery of the filter ring (5) expands outward to form an outer edge (51), which is bonded and fixed to the bottom of the lower mounting plate (33).

4. The oil filter according to claim 1, characterized in that, The distance between the valve cover (41) tension spring moving upward to its maximum stroke height and the lower mounting plate (33) is equal to twice the distance between the top of the filter ring (5) and the lower mounting plate (33).

5. The oil filter according to claim 1, characterized in that, The lower mounting plate (33) is also fixed with a positioning frame (331) above the valve port (330). The positioning frame (331) is fitted around the outer periphery of the filter ring (5). The positioning frame (331) is an open hollow cylindrical structure. A limit stop (3311) is provided inside the positioning frame (331) to limit the maximum stroke height of the valve cover (41) moving upward.

6. The oil filter according to claim 1, characterized in that, The bottom of the lower mounting plate (33) is connected to a plurality of bearing columns (332). The bottom end of the bearing column (332) is fixed in a fixing groove opened on the bottom surface (1a) of the outer shell (1). The bearing column (332) is used to support the lower mounting plate (33), so that the lower mounting plate (33) and the bottom surface (1a) of the outer shell (1) form an oil inlet space.

7. The oil filter according to claim 1, characterized in that, The diameter of the central pipe (320) is 23mm to 27mm, and the diameter of the valve port (330) is 18mm to 23.8mm.

8. The oil filter according to claim 1, characterized in that, The lower mounting plate (33) has multiple filter paper mounting grooves (333) arranged circumferentially around its center. Each filter paper mounting groove (333) extends radially upward along the lower mounting plate (33) to secure the filter paper folds on the filter paper cylinder (32).

9. The oil filter according to claim 1, characterized in that, The oil filter also includes a check gasket (6), which is attached to the bottom of the top cover (2).

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