Pressure regulating type oil filter

Abstract

The utility model relates to a pressure regulating type oil filter which comprises a shell, a check valve, a filter element and a bypass valve. The shell comprises a bottom shell and a top cover. The top cover is provided with a liquid outlet hole and a liquid inlet hole. A bypass ring is arranged at the end, away from the top cover, of the filter element. The bypass ring is located in the center flow channel and arranged in the axial direction of the center flow channel. The end, close to the top cover, of the bypass ring is provided with internal threads, and the end, away from the top cover, of the bypass ring communicates with the lateral flow channel and is provided with a drainage hole. The bypass valve comprises a piston, a first spring and a pressure adjusting rod which are sequentially installed on a bypass ring. One end of the pressure regulating rod is provided with an external thread matched with the internal thread, and the other end of the pressure regulating rod extends to the liquid outlet hole in the axial direction of the central flow channel. According to the engine oil filter, the filter element and the bypass valve are improved, the pressure adjusting rod is additionally arranged to adjust the compression amount of the first spring of the bypass valve, a user can adjust the leakage threshold value according to personal vehicle using habits, and the filtering function of the engine oil filter can be effectively achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts, in particular to a pressure regulating type oil filter. BACKGROUND

[0002] The automobile three filters refer to three filters applied on the automobile, which are air filter, gasoline filter and oil filter. Among them, the air filter is used for filtering the air entering the automobile engine, the gasoline filter is used for filtering the gasoline entering the automobile engine, and the oil filter is used for filtering the oil entering the automobile engine. The three all have important influence on the working efficiency and service life of the engine. Generally, the oil filter is provided with a check valve, a filter element and a bypass valve. In normal operation, the oil is driven by the oil pump to pass through the check valve and then seep into the filter element from the outer peripheral side wall of the filter element for filtration. The filtered oil is guided to the automobile engine from the central passage of the filter element. When too much dirt accumulates on the filter element, it will be difficult for the oil to seep into the filter element, resulting in insufficient oil supply. At this time, the oil continues to be input under the drive of the oil pump, so the oil pressure of the oil accumulated on the outer peripheral side of the filter element continues to rise. When the oil pressure reaches the preset relief threshold, the bypass valve at the bottom of the filter element is opened by the oil, so that the oil enters the central passage without filtering by the filter element and is guided to the automobile engine. Although this relief design sacrifices the filtering function, it ensures the oil supply of the automobile engine and is an indispensable structural design on the oil filter.

[0003] In the traditional oil filter, the relief threshold of the bypass valve is fixed after the product is shipped, and the user cannot adjust the relief threshold. In actual use, the use of the oil filter is closely related to the user's driving habits. For example, for users who like to step on the accelerator, the working state of the automobile engine will also be very fierce, and the oil supply of the oil pump will also become fierce. For such users, the relief threshold of the bypass valve needs to be set higher, otherwise the bypass valve will often be in the open state, and the oil filter will lose its filtering function. Since the traditional oil filter does not have the relief threshold adjustment function, the user cannot adjust it according to his own driving habits, resulting in that the oil filter cannot effectively play its filtering function. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model provides a pressure regulating type oil filter, which improves the filter element and the bypass valve and adds a pressure regulating rod to adjust the compression amount of the first spring of the bypass valve, so that the user can adjust the relief threshold according to his own driving habits, and the oil filter can effectively play its filtering function.

[0005] A pressure regulating type oil filter, comprising:

[0006] The shell comprises a bottom shell and a top cover connected to the bottom shell; the top cover is provided with an outlet hole and an inlet hole; the outlet hole is located at the center of the top cover; the inlet hole is multiple and uniformly distributed around the outlet hole on the outer periphery;

[0007] A check valve connected to the shell; the check valve is located at the bottom of the top cover and used to block the inlet hole;

[0008] A filter element located in the shell; a lateral flow channel is reserved between the outer peripheral side of the filter element and the inner wall of the bottom shell, and the lateral flow channel is communicated with the inlet hole; a central flow channel is provided at the central axis of the filter element and communicated with the outlet hole; a bypass ring is provided at the end of the filter element away from the top cover; the bypass ring is located in the central flow channel and arranged along the axial direction of the central flow channel; the end of the bypass ring close to the top cover is provided with an internal thread, and the end of the bypass ring away from the top cover is communicated with the lateral flow channel and provided with a leakage hole; and

[0009] A bypass valve connected to the filter element; the bypass valve comprises a piston, a first spring and a pressure regulating rod which are sequentially mounted on the bypass ring; the pressure regulating rod is provided with an external thread matched with the internal thread at one end, and the other end of the pressure regulating rod extends to the outlet hole along the axial direction of the central flow channel; the piston is used to block the leakage hole; the first spring is used to provide a driving force to push the piston to block the leakage hole; and the pressure regulating rod is used to adjust the compression amount of the first spring.

[0010] When the above-mentioned pressure regulating type oil filter is in operation, the oil enters the lateral flow channel from the inlet hole of the top cover under the driving of the oil pump, penetrates into the central flow channel from the filter element to complete the filtration, and is then guided out from the outlet to flow to the automobile engine. When the oil pressure in the lateral flow channel reaches a preset pressure relief threshold, the oil pushes the piston to move, forcing the first spring to be compressed, so that the leakage hole is communicated with the lateral flow channel, achieving the purpose of pressure relief. When the user needs to adjust the pressure relief threshold according to personal driving habits, the end of the pressure regulating rod extending to the outlet hole is operated to force the pressure regulating rod to rotate, thereby adjusting the feeding depth of the pressure regulating rod in the bypass ring, adjusting the compression amount of the first spring, and achieving the purpose of adjusting the pressure relief threshold. Through the above design, the filter element and the bypass valve are improved, and the pressure regulating rod is added to adjust the compression amount of the first spring of the bypass valve, so that the user can adjust the pressure relief threshold according to personal driving habits, and the oil filter can effectively play its filtering function.

[0011] In one of the embodiments, the pressure regulating type oil filter further comprises a second spring located in the shell; one end of the second spring abuts against the bottom of the bottom shell, and the other end of the second spring abuts against the end of the filter element away from the top cover; and the second spring is used to push the filter element towards the top cover. The second spring provides a certain floating space for the installation of the filter element, and also forms an overhanging layer between the end of the filter element and the bottom of the bottom shell, ensuring the communication between the lateral flow channel and the bypass valve.

[0012] In one of the embodiments, the top cover comprises a cover plate, a fixing ring sleeved on the outer periphery of the cover plate, and a sealing ring located at the joint of the cover plate and the fixing ring; the liquid outlet hole and the liquid inlet hole are both arranged on the cover plate; and the fixing ring is connected to the bottom shell.

[0013] In one of the embodiments, the check valve is a silica gel ring.

[0014] In one of the embodiments, the pressure-regulating oil filter further comprises a cylindrical filter screen arranged on the filter element; and the cylindrical filter screen is located in the central flow channel. The cylindrical filter screen can intercept the filter paper fragments falling off when the filter paper on the filter element is damaged, so as to prevent the filter paper fragments from entering the automobile engine and achieve the purpose of protecting the automobile engine.

[0015] In one of the embodiments, the end of the pressure-regulating rod close to the liquid outlet hole is a hexagonal convex column. The end of the pressure-regulating rod can be rotated by using a hexagonal wrench or pliers, and the operation is simple.

[0016] In one of the embodiments, the end face of the end of the pressure-regulating rod close to the liquid outlet hole is provided with a cross-shaped groove or a straight-shaped groove. The end of the pressure-regulating rod can be rotated by using a cross-shaped screwdriver or a straight-shaped screwdriver, and the operation is simple.

[0017] In one of the embodiments, the bypass ring is provided with a plurality of oil permeation holes; and the oil permeation holes are used for guiding the oil in the central flow channel into the bypass ring to lubricate the piston and the first spring. The bypass ring is communicated with the central flow channel by using the oil permeation holes, and the piston and the first spring are lubricated by the oil. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application;

[0019] Figure 2 A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application; Figure 1

[0020] A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application; Figure 3 Figure 1 A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application;

[0021] A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application; Figure 4 Figure 1 A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application;

[0022] A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application; Figure 5 Figure 4 A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application;

[0023] A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application; Figure 6 Figure 4 A perspective view of the pressure-regulating oil filter according to one of the embodiments of the present application; ​

[0024] Figure 7 For Figure 6 A half sectional view of the filter element is shown.

[0025] The meanings of the various reference signs in the drawings are as follows:

[0026] 100 - pressure regulating oil filter;

[0027] 10 - housing, 11 - bottom shell, 12 - top cover, 121 - liquid outlet hole, 122 - liquid inlet hole, 123 - cover plate, 124 - fixing ring, 125 - sealing ring;

[0028] 20 - check valve;

[0029] 30 - filter element, 31 - lateral flow channel, 32 - central flow channel, 33 - bypass ring, 331 - internal thread, 332 - leakage hole, 34 - first abutting ring, 35 - second abutting ring;

[0030] 40 - bypass valve, 41 - piston, 42 - first spring, 43 - pressure regulating rod, 431 - external thread;

[0031] 50 - second spring;

[0032] 60 - cylindrical filter screen. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second", "third", etc. are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or an ordered sequence. Thus, features referring to "first", "second" etc. can include, explicitly or implicitly, one or more of such features. In the description of the application, the meaning of "a plurality of" is at least two, for example two, three, etc., unless specifically defined otherwise.

[0036] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0039] As shown in FIG. 1, it is a pressure regulating type oil filter 100 of an embodiment of the present application. Figures 1 to 7

[0040] As shown in FIG. 1, it is a pressure regulating type oil filter 100 of an embodiment of the present application. Figures 1 to 5 ​As shown, the pressure regulating oil filter 100 comprises a housing 10, a check valve 20 connected to the housing 10, a filter element 30 located in the housing 10, and a bypass valve 40 connected to the filter element 30. The housing 10 is used to form a flow channel structure with the filter element 30 for the oil to flow through, and also used to load the filter element 30. The filter element 30 is used to filter the oil entering the housing 10. The check valve 20 is used to block the inlet of the housing 10. When the oil pump is working, the oil pressure is used to force the check valve 20 to open. When the oil pump stops working, the check valve 20 can block the inlet of the housing 10. The bypass valve 40 is used to provide a channel for the oil to flow to the engine without passing through the filter element 30 when the oil cannot normally permeate the filter element 30, resulting in the oil pressure in the housing 10 being too high.

[0041] Hereinafter, the pressure regulating oil filter 100 will be further described in combination with Figures 1 to 7 the accompanying drawings.

[0042] As shown in Figure 1 and Figure 3 , the housing 10 comprises a bottom shell 11 and a top cover 12 connected to the bottom shell 11. As shown in Figure 4 , the top cover 12 is provided with an outlet hole 121 and an inlet hole 122. The outlet hole 121 is located at the center of the top cover 12, and the inlet hole 122 is a plurality of and evenly distributed around the outer periphery of the outlet hole 121. For example, in this embodiment, the number of inlet holes 122 is six and evenly distributed around the outer periphery of the outlet hole 121.

[0043] Further, as shown in Figure 3 , in this embodiment, the top cover 12 comprises a cover plate 123, a fixing ring 124 sleeved on the outer periphery of the cover plate 123, and a sealing ring 125 located at the connection between the cover plate 123 and the fixing ring 124. The outlet hole 121 and the inlet hole 122 are both provided on the cover plate 123, and the fixing ring 124 is connected to the bottom shell 11. In this embodiment, the cover plate 123 and the fixing ring 124 are welded together, and the fixing ring 124 is riveted on the bottom shell 11. The sealing ring 125 is fixed at the connection between the cover plate 123 and the fixing ring 124 by glue, and in use, the sealing ring 125 is used to strengthen the connection sealing between the top cover 12 and the oil supply pipeline.

[0044] As shown in Figure 3 and Figure 5 , the check valve 20 is located at the bottom of the top cover 12 and is used to block the inlet hole 122. In this scheme, the check valve 20 can be a rubber ring or a silicone ring. As preferred, in this embodiment, the check valve 20 is a silicone ring, which has better chemical stability and service life than rubber.

[0045] As shown in Figure 5As shown, a lateral flow channel 31 is reserved between the outer periphery of the filter element 30 and the inner wall of the bottom shell 11, and the lateral flow channel 31 connects to the liquid inlet hole 122. Combined with... Figure 5 , Figure 6 ,as well as Figure 7 As shown, the filter element 30 has a central flow channel 32 at its central axis, which connects to the liquid outlet 121. A bypass ring 33 is provided at the end of the filter element 30 facing away from the top cover 12. The bypass ring 33 is located in the central flow channel 32 and is arranged along the axial direction of the central flow channel 32. The end of the bypass ring 33 near the top cover 12 has an internal thread 331, and the end of the bypass ring 33 facing away from the top cover 12 connects to the lateral flow channel 31 and has a drain hole 332.

[0046] like Figure 3 and Figure 5 As shown, the bypass valve 40 includes a piston 41, a first spring 42, and a pressure regulating rod 43, which are sequentially mounted on the bypass ring 33. One end of the pressure regulating rod 43 has an external thread 431 that matches the internal thread 331, and the other end of the pressure regulating rod 43 extends axially along the central flow channel 32 to the outlet hole 121. The piston 41 is used to block the drain hole 332. The first spring 42 is used to provide the driving force to push the piston 41 to block the drain hole 332. The pressure regulating rod 43 is used to adjust the compression of the first spring 42.

[0047] like Figure 3 and Figure 5 As shown, in this embodiment, the end of the pressure regulating rod 43 near the liquid outlet 121 is a regular hexagonal protrusion. The end of the pressure regulating rod 43 can be rotated using an external hex wrench or pliers, making operation simple.

[0048] In other embodiments, the pressure regulating rod 43 can also adopt other designs. For example, the end face of the pressure regulating rod 43 near the liquid outlet 121 is provided with a cross-shaped groove or a flat-head groove. The end of the pressure regulating rod 43 can be rotated with a Phillips screwdriver or a flat-head screwdriver, making operation simple.

[0049] Furthermore, considering that friction will also occur between the piston 41 and the first spring 42 during mechanical operation, in order to improve the service life of the bypass valve 40, in some embodiments, the bypass ring 33 may be provided with multiple oil seepage holes. The oil seepage holes are used to guide the oil in the central flow channel 32 into the bypass ring 33 to lubricate the piston 41 and the first spring 42. The oil seepage holes allow the bypass ring 33 to communicate with the central flow channel 32, and the oil lubricates the piston 41 and the first spring 42.

[0050] For ease of assembly, such as Figure 3 and Figure 5As shown, in this embodiment, the pressure-regulating oil filter 100 further includes a second spring 50 located inside the housing 10. One end of the second spring 50 abuts against the bottom of the bottom housing 11, and the other end of the second spring 50 abuts against the end of the filter element 30 facing away from the top cover 12. The second spring 50 is used to push the filter element 30 towards the top cover 12. The second spring 50 provides a certain floating space for the installation of the filter element 30, and also forms a gap between the end of the filter element 30 and the bottom of the bottom housing 11, ensuring the continuity between the lateral flow channel 31 and the bypass valve 40.

[0051] Furthermore, such as Figure 6 As shown, in this embodiment, one end of the filter element 30 is provided with a first mating ring 34, and the other end of the filter element 30 is provided with a second mating ring 35. Figure 5 As shown, the first docking ring 34 is used to dock the top cover 12 and the check valve 20, while the second docking ring 35 is used to dock the second spring 50 and to limit the second spring 50.

[0052] Considering the risk of filter paper on filter element 30 breaking and falling off after long-term use, if these detached filter paper fragments enter the car engine, they could cause serious damage. Therefore, if... Figure 3 and Figure 5 As shown, in this embodiment, the pressure-regulating oil filter 100 further includes a columnar filter screen 60 passing through the filter element 30. The columnar filter screen 60 is located in the central flow channel 32. The function of the columnar filter screen 60 is to intercept the detached filter paper fragments when the filter paper on the filter element 30 is damaged, preventing the filter paper fragments from entering the car engine and thus protecting the car engine.

[0053] Brief description of working principle:

[0054] like Figure 5 As shown, during operation, the engine oil, driven by the oil pump, enters the side flow channel 31 from the inlet hole 122 of the top cover 12, permeates through the filter element 30 to the central flow channel 32 for filtration, and is then discharged from the outlet to flow to the car engine. When the oil pressure in the side flow channel 31 reaches the preset pressure relief threshold, the oil pushes the piston 41 to move, forcing the first spring 42 to be compressed, thereby making the drain hole 332 connected to the side flow channel 31, achieving the purpose of pressure relief. When the user needs to adjust the pressure relief threshold according to personal driving habits, the pressure adjusting rod 43 is operated to extend to one end of the outlet hole 121, forcing the pressure adjusting rod 43 to rotate (e.g., Figure 4 As shown, in this embodiment, the top cover 12 may be provided with arrows and markers to indicate the direction of pressure adjustment to the user, thereby adjusting the feed depth of the pressure adjusting rod 43 in the bypass ring 33, thereby adjusting the compression amount of the first spring 42 to achieve the purpose of adjusting the pressure relief threshold.

[0055] The above-mentioned pressure regulating type oil filter 100 improves the filter element 30 and the bypass valve 40, and adds a pressure regulating rod 43 to adjust the compression amount of the first spring 42 of the bypass valve 40, so that the user can adjust the threshold according to the personal driving habit, so that the oil filter can effectively play its filtering function.

[0056] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0057] The above embodiments only express the preferred embodiments of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A pressure-regulated oil filter, characterized by, The utility model relates to a filter element, comprising: a housing; the housing comprises a bottom shell and a top cover connected to the bottom shell; the top cover is provided with a liquid outlet hole and a liquid inlet hole; the liquid outlet hole is located at the center of the top cover; the liquid inlet hole is multiple and uniformly distributed around the liquid outlet hole on the outer periphery; a check valve connected to the housing; the check valve is located at the bottom of the top cover and is used for plugging the liquid inlet hole; a filter element located in the housing; a lateral flow channel is reserved between the outer peripheral side of the filter element and the inner wall of the bottom shell, and the lateral flow channel communicates with the liquid inlet hole; a central flow channel communicating with the liquid outlet hole is arranged at the central axis of the filter element; a bypass ring is arranged at one end of the filter element away from the top cover; the bypass ring is located in the central flow channel and is arranged along the axial direction of the central flow channel; one end of the bypass ring close to the top cover is provided with an internal thread, and the other end of the bypass ring away from the top cover communicates with the lateral flow channel and is provided with a leakage hole; and a bypass valve connected to the filter element; the bypass valve comprises a piston, a first spring and a pressure regulating rod which are sequentially mounted on the bypass ring; one end of the pressure regulating rod is provided with an external thread matched with the internal thread, and the other end of the pressure regulating rod extends to the liquid outlet hole along the axial direction of the central flow channel; the piston is used for plugging the leakage hole; the first spring is used for providing a driving force for pushing the piston to plug the leakage hole; and the pressure regulating rod is used for adjusting the compression amount of the first spring.

2. The pressure regulated oil filter of claim 1, wherein Further comprising: a second spring located in the housing; one end of the second spring abuts against the bottom of the bottom shell, and the other end of the second spring abuts against one end of the filter element away from the top cover; the second spring is used for pushing the filter element towards the top cover.

3. The pressure regulated oil filter of claim 1, wherein, the top cover comprises a cover plate, a fixing ring sleeved on the outer periphery of the cover plate and a sealing ring located at the connection between the cover plate and the fixing ring; the liquid outlet hole and the liquid inlet hole are arranged on the cover plate; and the fixing ring is connected to the bottom shell.

4. The pressure regulated oil filter of claim 1, wherein, the check valve is a silica gel ring.

5. The pressure regulated oil filter of claim 1, wherein Further comprising: a columnar filter screen penetrating the filter element; the columnar filter screen is located in the central flow channel.

6. The pressure regulated oil filter of claim 1, wherein, one end of the pressure regulating rod close to the liquid outlet hole is a regular hexagonal convex column.

7. The pressure regulated oil filter of claim 1, wherein, the end face of one end of the pressure regulating rod close to the liquid outlet hole is provided with a cross-shaped groove or a linear groove.

8. The pressure regulated oil filter of claim 1, wherein, the bypass ring is provided with multiple oil permeation holes; the oil permeation holes are used for guiding the engine oil in the central flow channel into the bypass ring to lubricate the piston and the first spring.

Images