Multi-filtering engine oil filter

Abstract

The utility model relates to a multi-filtering engine oil filter which comprises a bottom shell, a sealing cover, a check valve, a filter element, a bypass valve, a first filtering ring and a second filtering ring. A bypass pipe is arranged at one end of the filter element deviating from the sealing cover. And a first filtering hole is formed in the side wall of the bypass pipe. The bypass valve comprises a fixing piece, a first spring and a piston which are sequentially contained in the bypass pipe. The piston is located at the end, communicating with the lateral runner, of the bypass pipe. Second filtering holes are formed in the side wall of the first filtering ring. The second filter ring is located on the outer peripheral side of the first filter ring. Third filtering holes are formed in the side wall of the second filtering ring. The apertures of the third filtering hole, the second filtering hole and the first filtering hole are sequentially reduced. By improving the filter element and additionally arranging the first filter screen and the second filter screen, when the bypass valve is opened, engine oil around the filter element can be subjected to three-stage filtration, the risk that impurities enter an automobile engine along a center channel is greatly reduced, and the safety of the automobile engine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile accessories, in particular to a multi-filtering oil filter. BACKGROUND

[0002] The oil filter is a kind of filter commonly used in automobile, which is used to filter the oil entering the engine of automobile. 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, then seeps into the filter element from the outer peripheral side wall of the filter element to be filtered, and the filtered oil is guided to the engine of automobile from the central passage of the filter element. When the filter element is blocked or the supply of oil suddenly increases, the oil pressure in the oil filter increases, thereby forcing the bypass valve to be opened, and the oil can directly enter the central passage from the bypass valve, at this time, part of the oil can be directly introduced into the engine of automobile without filtering by the filter element.

[0003] In the conventional oil filter, when the bypass valve is opened, the unfiltered oil is directly introduced into the engine of automobile. At the same time, when the bypass valve is opened, the flow rate of the oil outside the filter element increases, which may flush down the impurities adhering to the outer surface of the filter element and carry them into the bypass valve, and finally the impurities enter the engine of automobile through the central passage, which seriously endangers the safety of the engine of automobile. SUMMARY

[0004] Therefore, the utility model provides a multi-filtering oil filter, which improves the filter element and adds a first filter screen and a second filter screen, so that when the bypass valve is opened, the oil bypassing the filter element can be filtered by three levels, greatly reducing the risk of impurities entering the engine of automobile through the central passage and improving the safety of the engine of automobile.

[0005] A multi-filtering oil filter, comprising:

[0006] a bottom shell;

[0007] a cover connected to the bottom shell, the center of the cover being provided with an outlet hole, and the cover being further provided with a plurality of inlet holes arranged around the outlet hole;

[0008] a check valve connected to the cover, the check valve being used to block the inlet holes;

[0009] a filter element located in the bottom shell, a lateral flow channel communicating with the inlet holes being formed between the outer peripheral side of the filter element and the inner wall of the bottom shell, a central flow channel communicating with the outlet hole being provided at the center of the filter element, a bypass pipe being provided at one end of the filter element away from the cover, the bypass pipe being located in the central flow channel, one end of the bypass pipe communicating with the lateral flow channel, and the side wall of the bypass pipe being provided with a first filter hole;

[0010] The bypass valve is installed on the filter element; the bypass valve comprises: a fixing member, a first spring and a piston which are sequentially accommodated in the bypass pipe; the piston is located at one end of the bypass pipe which is communicated with the side flow channel;

[0011] The first filter ring is located between the bottom shell and the filter element; the side wall of the first filter ring is provided with a second filter hole; and

[0012] The second filter ring is located between the bottom shell and the filter element; the second filter ring is located at the outer circumferential side of the first filter ring; the side wall of the second filter ring is provided with a third filter hole; the aperture of the third filter hole, the second filter hole and the first filter hole is sequentially reduced.

[0013] The above-mentioned multi-filtering oil filter, when the bypass valve is not opened, the oil seeps into the center flow channel from the outside of the filter element, thereby filtering the oil. When the bypass valve is opened, part of the oil bypasses the filter element, sequentially passes through the third filter hole of the second filter ring and the second filter hole of the first filter ring, enters the bypass pipe, and then enters the center flow channel after passing through the first filter hole. Moreover, the aperture of the third filter hole, the second filter hole and the first filter hole is sequentially reduced, so that although the oil does not pass through the filter element, it still needs to pass through three levels of filtration before entering the center flow channel, thereby achieving the filtration of the oil bypassing the filter element. Through the above design, by improving the filter element and adding the first filter screen and the second filter screen, when the bypass valve is opened, three levels of filtration can be realized for the oil bypassing the filter element, thereby greatly reducing the risk of impurities entering the automobile engine through the center channel and improving the safety of the automobile engine.

[0014] In one of the embodiments, the bypass pipe is provided with a first internal thread at the end facing the cover; the fixing member is provided with a first external thread matching the first internal thread. The threaded connection facilitates the assembly of the bypass valve into the bypass pipe.

[0015] In one of the embodiments, the filter element is provided with a first clamping groove and a second clamping groove at the end away from the cover; the first clamping groove clamps the first filter ring; and the second clamping groove clamps the second filter ring. Through the clamping, the positioning of the first filter ring and the second filter ring is realized, thereby improving the assembly precision and stability.

[0016] In one of the embodiments, the multi-filtering oil filter further comprises: a third filter ring located in the filter element; the third filter ring is located in the center channel and at the outer circumferential side of the bypass pipe; the third filter ring is provided with a fourth filter hole, and the aperture of the fourth filter hole is the same as that of the first filter hole. The third filter ring can intercept the fragments of the filter element, thereby reducing the risk of the fragments of the filter element entering the automobile engine.

[0017] In one of the embodiments, the multi-filtering oil filter further comprises: a filter cartridge connected to the cover; the filter cartridge is located at the end of the cover facing the filter element and inserted into the central flow channel; the outlet of the filter cartridge communicates with the outlet hole; the fifth filtering hole is formed in the side wall of the filter cartridge; the diameter of the fifth filtering hole is less than or equal to the diameter of the first filtering hole. The filter cartridge can filter the oil flowing out of the filter element, intercept the debris falling off the filter element, and reduce the risk of the debris of the filter element entering the automobile engine.

[0018] In one of the embodiments, the outer side of the filter cartridge is provided with a second external thread; the cover is provided with a second internal thread matched with the second external thread; the shape of the cross section of the outlet of the filter cartridge is a regular hexagon. During assembly, the filter cartridge can be inserted from the inlet hole, and then a hexagonal wrench is inserted into the outlet of the filter cartridge and rotated, so as to realize the installation of the filter cartridge.

[0019] In one of the embodiments, the side of the cover away from the filter element is provided with an identification for indicating the tightening direction of the filter cartridge. The identification facilitates the staff to identify the tightening direction of the filter cartridge. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A perspective view of the multi-filtering oil filter of one of the embodiments of the utility model;

[0021] Figure 2 A Figure 1 A semi-sectional view of the multi-filtering oil filter shown in the figure;

[0022] Figure 3 A Figure 1 An exploded view of the multi-filtering oil filter shown in the figure;

[0023] Figure 4 A Figure 1 A perspective view of the multi-filtering oil filter hidden bottom shell shown in the figure;

[0024] Figure 5 A Figure 4 A perspective view of the filter element in the multi-filtering oil filter shown in the figure;

[0025] Figure 6 A Figure 5 A semi-sectional view of the filter element shown in the figure.

[0026] The meanings of the reference signs in the drawings are as follows:

[0027] 100-multi-filtering oil filter;

[0028] 10-bottom shell;

[0029] 20-cover, 21-outlet hole, 22-inlet hole;

[0030] 30-check valve;

[0031] 40 - filter core, 41 - bypass pipe, 411 - first filter hole, 42 - first clamping groove, 43 - second clamping groove;

[0032] 50 - bypass valve, 51 - fixing piece, 52 - first spring, 53 - piston;

[0033] 60 - first filter ring, 61 - second filter hole;

[0034] 70 - second filter ring, 71 - third filter hole;

[0035] 80 - third filter ring, 81 - fourth filter hole;

[0036] 90 - filter cartridge, 91 - fifth filter hole. DETAILED DESCRIPTION

[0037] In order to make the above objectives, characteristics and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0038] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0039] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] like Figures 1 to 6 As shown, it is a multi-filtration oil filter 100 of this utility model.

[0044] like Figures 1 to 3As shown, the multi-filtration oil filter 100 includes: a base housing 10, a cover 20 connected to the base housing 10, a check valve 30 connected to the cover 20, a filter element 40 located inside the base housing 10, a bypass valve 50 mounted on the filter element 40, a first filter ring 60 located between the base housing 10 and the filter element 40, and a second filter ring 70 located between the base housing 10 and the filter element 40. The base housing 10 and the cover 20 share a cavity for housing the check valve 30, the filter element 40, the bypass valve 50, the first filter ring 60, and the second filter ring 70. The check valve 30 prevents oil from flowing back from the base housing 10 to the oil pump when the oil pump stops operating. The filter element 40 filters the oil. The bypass valve 50 allows oil to be directly introduced into the filter element 40 when the filter element 40 is clogged or the oil pressure inside the base housing 10 reaches a pressure relief threshold. Furthermore, when the bypass valve 50 is opened, the filter element 40, the first filter ring 60, and the second filter ring 70 perform triple filtration of the engine oil before the engine oil can enter the filter element 40.

[0045] The following text, combined with Figures 1 to 6 The above three-stage filtration oil filter 100 will be further explained.

[0046] like Figure 1 As shown, the cover 20 has a liquid outlet 21 at its center, and the cover 20 also has a plurality of liquid inlets 22 arranged around the liquid outlet 21. For example, in this embodiment, the number of liquid inlets 22 is six and they are evenly distributed around the outer periphery of the liquid outlet 21.

[0047] like Figure 2 As shown, the check valve 30 is used to block the inlet port 22. In this embodiment, the check valve 30 is a horn-shaped silicone ring. In other embodiments, the check valve 30 may also be a horn-shaped rubber ring.

[0048] like Figure 2 As shown, a lateral flow channel connecting the inlet hole 22 is formed between the outer periphery of the filter element 40 and the inner wall of the bottom shell 10, while a central flow channel connecting the outlet hole 21 is provided at the center of the filter element 40. Figure 2 and Figure 6 As shown, the filter element 40 has a bypass pipe 41 at the end opposite to the cover 20. The bypass pipe 41 is located in the central flow channel, and one end of the bypass pipe 41 is connected to the lateral flow channel. A first filter hole 411 is opened on the side wall of the bypass pipe 41.

[0049] like Figure 2 and Figure 3 As shown, the bypass valve 50 includes: a fixing member 51, a first spring 52, and a piston 53, which are sequentially housed within the bypass pipe 41. The piston 53 is located at one end of the bypass pipe 41 that connects to the lateral flow channel. Figure 2As shown, as the piston 53 is pushed in to a greater depth, the bypass valve 50 will open more, allowing oil to be quickly directed into the center flow passage, achieving rapid pressure relief and oil supply.

[0050] In this embodiment, as shown in Figure 6 The bypass pipe 41 is provided with a first internal thread at one end facing the cover 20. As shown in Figure 3 The fixing member 51 is provided with a first external thread matching the first internal thread. The threaded connection facilitates assembly of the bypass valve 50 into the bypass pipe 41. In addition, before the filter leaves the factory, the fixing member 51 can be rotated to adjust the compression of the first spring 52, thereby adjusting the pressure relief threshold of the bypass valve 50.

[0051] As shown in Figures 2 to 3 The side wall of the first filter ring 60 is provided with a second filter hole 61. The second filter ring 70 is located on the outer circumferential side of the first filter ring 60, and the side wall of the second filter ring 70 is provided with a third filter hole 71. The diameters of the third filter hole 71, the second filter hole 61, and the first filter hole 411 decrease in turn. As shown in Figure 2 In this embodiment, the first filter ring 60 and the second filter ring 70 are both clamped between the end of the filter element 40 and the bottom of the bottom shell 10.

[0052] Further, as shown in Figure 2 , Figure 4 , and Figure 6 In this embodiment, the filter element 40 is provided with a first clamping groove 42 and a second clamping groove 43 at one end facing away from the cover 20. The first clamping groove 42 clamps the first filter ring 60. The second clamping groove 43 clamps the second filter ring 70. Through clamping, the positioning of the first filter ring 60 and the second filter ring 70 is achieved, improving the precision and stability of assembly.

[0053] Brief working principle:

[0054] As shown in Figure 2 When the bypass valve 50 is not opened, oil seeps from the outside of the filter element 40 into the center flow passage, thereby filtering the oil. When the bypass valve 50 is opened, part of the oil bypasses the filter element 40, passes through the third filter hole 71 of the second filter ring 70 and the second filter hole 61 of the first filter ring 60 in turn, enters the bypass pipe 41, and then enters the center flow passage through the first filter hole 411. Moreover, the diameters of the third filter hole 71, the second filter hole 61, and the first filter hole 411 decrease in turn, so although the oil has not been filtered by the filter element 40, it still needs to pass through three levels of filtration before entering the center flow passage, thereby achieving filtration of the oil that bypasses the filter element 40.

[0055] In view of the fact that the main filtering component of the filter element 40 is currently a fiber filter paper, which has the risk of falling off in pieces or fibers during use, targeted improvements can be made.

[0056] For example, the multi-stage filtering oil filter 100 further comprises a third filter ring 80 located in the filter element 40. The third filter ring 80 is located in the central passage and on the outer peripheral side of the bypass pipe 41. The third filter ring 80 is provided with fourth filter holes 81, and the fourth filter holes 81 have the same hole diameter as the first filter holes 411. The third filter ring 80 can intercept the debris falling off from the filter element 40, reducing the risk of the debris of the filter element 40 entering the automobile engine.

[0057] For another example, as shown in Figure 2 and Figure 3 In this embodiment, the multi-stage filtering oil filter 100 can further comprise a filter cartridge 90 connected to the cover 20. The filter cartridge 90 is located at the end of the cover 20 facing the filter element 40 and is inserted into the central flow passage. The outlet of the filter cartridge 90 communicates with the outlet hole 21. The side wall of the filter cartridge 90 is provided with fifth filter holes 91. The fifth filter holes 91 have a hole diameter less than or equal to that of the first filter holes 411. The filter cartridge 90 can filter the oil flowing out of the filter element 40, intercept the debris falling off from the filter element 40, and reduce the risk of the debris of the filter element 40 entering the automobile engine.

[0058] As shown in Figure 2 and Figure 3 In this embodiment, the outer side of the filter cartridge 90 is provided with a second external thread. The cover 20 is provided with a second internal thread matching the second external thread. The shape of the cross section of the outlet of the filter cartridge 90 is a regular hexagon. During assembly, the filter cartridge 90 can be inserted from the inlet hole 22, and then a hexagonal wrench is inserted into the outlet of the filter cartridge 90 and rotated to achieve the installation of the filter cartridge 90.

[0059] Further, as shown in Figure 1 and Figure 2 In this embodiment, the side of the cover 20 away from the filter element 40 is provided with an identification for indicating the tightening direction of the filter cartridge 90. The identification facilitates the identification of the tightening direction of the filter cartridge 90 by the staff.

[0060] The above multi-stage filtering oil filter 100, by improving the filter element 40 and adding the first filter screen and the second filter screen, can realize three-stage filtering of the oil bypassing the filter element 40 when the bypass valve 50 is opened, greatly reduce the risk of impurities entering the automobile engine through the central passage, and improve the safety of the automobile engine.

[0061] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combination of the technical features does not exist contradiction, it should be considered as the scope of the description.

[0062] The above embodiments only express the preferred embodiments of the utility model, 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 multi-stage filtration oil filter, characterized in that, include: Bottom shell; A cover is connected to the bottom shell; the cover has a liquid outlet hole at its center; the cover also has multiple liquid inlet holes arranged around the liquid outlet hole; A check valve connected to the cap; the check valve is used to block the liquid inlet. A filter element is located inside the bottom shell; a lateral flow channel connecting the liquid inlet is formed between the outer periphery of the filter element and the inner wall of the bottom shell; a central flow channel connecting the liquid outlet is provided at the center of the filter element; a bypass pipe is provided at one end of the filter element away from the cover; the bypass pipe is located inside the central flow channel, and one end of the bypass pipe is connected to the lateral flow channel; a first filter hole is opened on the side wall of the bypass pipe; A bypass valve is installed on the filter element; the bypass valve includes: a fixing member, a first spring, and a piston, which are sequentially housed in the bypass pipe; the piston is located at one end of the bypass pipe that communicates with the lateral flow channel; A first filter ring is located between the bottom shell and the filter element; a second filter hole is formed on the side wall of the first filter ring; and A second filter ring is located between the bottom shell and the filter element; the second filter ring is located on the outer periphery of the first filter ring; a third filter hole is provided on the side wall of the second filter ring; the diameters of the third filter hole, the second filter hole, and the first filter hole decrease sequentially.

2. The multi-filtration oil filter according to claim 1, characterized in that, The bypass pipe has a first internal thread at one end facing the cap; the fastener has a first external thread that matches the first internal thread.

3. The multi-filtration oil filter according to claim 1, characterized in that, The filter element has a first slot and a second slot at the end opposite to the cover; the first slot engages with the first filter ring; the second slot engages with the second filter ring.

4. The multi-filtration oil filter according to claim 1, characterized in that, Also includes: A third filter ring is located within the filter element; the third filter ring is located within the central flow channel and on the outer periphery of the bypass pipe; The third filter ring is provided with a fourth filter hole, and the fourth filter hole has the same diameter as the first filter hole.

5. The multi-filtration oil filter according to claim 1, characterized in that, Also includes: The filter cartridge connected to the cap; The filter cartridge is located at the end of the cover facing the filter element and is inserted into the central flow channel; The outlet of the filter cartridge is connected to the liquid outlet hole; The filter cartridge has a fifth filter hole on its side wall; the diameter of the fifth filter hole is less than or equal to the diameter of the first filter hole.

6. The multi-filtration oil filter according to claim 5, characterized in that, The filter cartridge has a second external thread on its outer side; the cover has a second internal thread that matches the second external thread; the outlet of the filter cartridge has a cross-section that is a regular hexagon.

7. The multi-filtration oil filter according to claim 5, characterized in that, The side of the cap facing away from the filter element has a marking to indicate the tightening direction of the filter cartridge.

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