Double-filtration quick-insertion oil filter element structure

Abstract

The utility model discloses a double-filtration quick-insertion oil filter element structure, which relates to the technical field of oil filter elements, and comprises two quick-insertion connectors, an outer filter element, an inner filter element and a spring, the size of the inner filter element is smaller than that of the outer filter element, the outer filter element comprises a connecting ring I and a filter screen I fixed on the connecting ring I, the inner filter element comprises a second connecting ring and a second filter screen fixed to the second connecting ring, the inner filter element is connected to the quick-plug connector on one side through the second connecting ring, the inner filter element is sleeved with the outer filter element, the outer filter element is connected to the quick-plug connector on the same side through the first connecting ring, and a gap is formed between the outer filter element and the inner filter element. A plurality of filter holes are formed in the first filter screen and the second filter screen in a staggered mode, one end of the spring sleeves the surface of the first filter screen of the outer filter element and is connected with the first connecting ring, the other end of the spring is connected with the quick-plug connector on the other side, and a transparent shell is installed between the quick-plug connectors on the two sides. The filter is compact in structure, good in filtering effect and not easy to block due to the adoption of the double filter elements; and the filter element is prevented from falling off by adopting close-fitting processing and spring abutting.

Description

Technical Field

[0001] This utility model relates to the field of oil filter element technology, and in particular to a dual-filtration quick-connect oil filter element structure. Background Technology

[0002] The oil filter in a model aircraft is a key component used to filter fuel, which is essential for ensuring the normal operation of the model aircraft engine.

[0003] Currently, some model aircraft oil filters are made of all-plastic one-piece molding, with a plastic filter element injected into it. Plastic filter elements are easily damaged and can only filter once. Others use metal oil filters, with the filter element inserted into the metal and threaded connections on both sides. Metal filter elements are single filter elements, and the filtration effect is generally poor. Therefore, we propose a dual-filtration quick-insertion oil filter element structure. Utility Model Content

[0004] The purpose of this invention is to provide a dual-filtration quick-connect oil filter element structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A dual-filter quick-connect oil filter element structure includes two quick-connect fittings, an outer filter element, an inner filter element, and a spring. The inner filter element is smaller than the outer filter element. The outer filter element includes a connecting ring 1 and a filter screen 1 fixed on the connecting ring 1. The inner filter element includes a connecting ring 2 and a filter screen 2 fixed on the connecting ring 2. The inner filter element is connected to a quick-connect fitting on one side via the connecting ring 2. The outer filter element is fitted onto the inner filter element and connected to a quick-connect fitting on the same side via the connecting ring 1. There is a gap between the outer filter element and the inner filter element. The filter screen 1 and the filter screen 2 are provided with a plurality of filter holes alternately. One end of the spring is fitted onto the surface of the filter screen 1 of the outer filter element and connected to the connecting ring 1. The other end of the spring is connected to the quick-connect fitting on the other side. A transparent outer shell is installed between the two quick-connect fittings.

[0007] Preferably, the quick-connect fitting includes an end cap, a first tapered tube, and a second tapered tube connected in sequence. The end cap is provided with an oil pipe interface. The second tapered tube is connected to an annular boss, and the first annular boss is connected to an annular boss. The outer diameter of the first annular boss is smaller than that of the second tapered tube, and the outer diameter of the second annular boss is smaller than that of the first annular boss. The second annular boss is provided with an oil inlet and outlet. The oil pipe interface passes through the end cap, the first tapered tube, the second tapered tube, the first annular boss, and the second annular boss in sequence and is connected to the oil inlet and outlet. The connection between the first tapered tube and the second tapered tube forms a connecting ring surface. The connection between the first annular boss and the second tapered tube forms an annular plane. The connection between the second annular boss and the first annular boss forms an annular plane.

[0008] Preferably, the inner filter element is sleeved on the annular boss two via a connecting ring two and fits into the annular plane two, and the outer filter element is sleeved on the annular boss one via a connecting ring and fits into the annular plane one.

[0009] Preferably, the outer surface of the filter screen and the connection point of the connecting ring form an annular plane three. One end of the spring is sleeved on the filter screen and connected to the annular plane three, and the other end is connected to the annular plane one of the quick-connect connector on the other side.

[0010] Preferably, the transparent outer shell is a cylindrical body with a through hole in the middle, and the two quick-connect connectors are respectively inserted into the through hole through the tapered tubes so that they are located on both sides of the transparent outer shell, and the two ends of the transparent outer shell are in contact with the connecting ring surface.

[0011] Preferably, the transparent outer shell is a plastic transparent tube, the quick-connect fitting is made of plastic, and the outer and inner filter elements are made of metal. The quick-connect fitting is heat-fitted to the transparent outer shell using an interference fit, and the outer and inner filter elements are heat-fitted to the quick-connect fitting using an interference fit.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention features a finely designed quick-connect fitting that ensures a tight fit with the two filter elements, preventing them from easily falling off and ensuring the two filter elements do not interfere with each other. The outer filter element is spring-loaded for added security and to prevent loosening or detachment. The two filter elements are nested together, with the inner and outer elements responsible for coarse and fine filtration respectively, achieving the filtration effect of multiple filters in a very small space. This invention boasts a compact structure, excellent dual-filter performance, and is less prone to clogging; the tight fit and spring-loaded connection further prevent filter element detachment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 Filter element disassembly of this utility model Figure 1 ;

[0016] Figure 3 Filter element disassembly of this utility model Figure 2 ;

[0017] Figure 4 Filter element disassembly of this utility model Figure 3 ;

[0018] Figure 5 This is a perspective view of the filter element of this utility model;

[0019] Figure 6 This is a structural plan view of the present utility model;

[0020] Figure 7 This is a perspective view of the outer shell structure of this utility model.

[0021] Figure Labels

[0022] 1. Quick-connect fitting; 11. End cap; 12. Oil pipe interface; 13. Tapered tube one; 14. Tapered tube two; 15. Connecting ring surface; 16. Annular boss one; 17. Annular boss two; 18. Annular plane one; 19. Annular plane two; 20. Oil inlet / outlet; 2. External filter element; 21. Filter screen one; 22. Connecting ring one; 23. Annular plane three; 3. Internal filter element; 31. Filter screen two; 32. Connecting ring two; 4. Spring; 5. Transparent outer shell. Detailed Implementation

[0023] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0024] like Figure 1-7 As shown, a dual-filter quick-connect oil filter element structure includes two quick-connect connectors 1, an outer filter element 2, an inner filter element 3, and a spring 4.

[0025] The quick-connector 1 includes an end cap 11, a tapered tube 13, and a tapered tube 14 connected in sequence. The end cap 11 is provided with an oil pipe interface 12. The tapered tube 14 is connected with an annular boss 16 and an annular boss 17. The outer diameter of the annular boss 16 is smaller than that of the tapered tube 14, and the outer diameter of the annular boss 17 is smaller than that of the annular boss 16. The annular boss 17 is provided with an oil inlet / outlet port 20. The oil pipe interface 12 passes through the end cap 11, the tapered tube 13, the tapered tube 14, the annular boss 16, and the annular boss 17 in sequence and is connected to the oil inlet / outlet port 20. The end cap 11 is movably mounted on the tapered tube 13. The end cap 11 is provided with a retaining spring for fixing the oil pipe. The internal structure and principle of the quick-connector 1 are existing technologies and will not be described in detail here.

[0026] The connection point of tapered tube 13 and tapered tube 2 14 forms a connecting annular surface 15, the connection point of annular boss 16 and tapered tube 2 14 forms an annular plane 18, and the connection point of annular boss 2 17 and annular boss 16 forms an annular plane 2 19.

[0027] The inner filter element 3 is smaller than the outer filter element 2. The outer filter element 2 includes a connecting ring 22 and a filter screen 21 fixed on the connecting ring 22. The inner filter element 3 includes a connecting ring 32 and a filter screen 31 fixed on the connecting ring 32. The inner filter element 3 is connected to a quick-connect connector 1 on one side through the connecting ring 32. The outer filter element 2 is fitted on the inner filter element 3 and connected to the quick-connect connector 1 on the same side through the connecting ring 22. The inner filter element 3 is fitted on the annular boss 17 through the connecting ring 32 and fits against the annular plane 19. The outer filter element 2 is fitted on the annular boss 16 through the connecting ring 22 and fits against the annular plane 18.

[0028] There is a gap between the outer filter element 2 and the inner filter element 3. Several filter holes are staggered on the filter screen 21 and the filter screen 31 to facilitate better filtration of fuel.

[0029] One end of the spring 4 is fitted onto the surface of the filter screen 21 of the outer filter element 2 and connected to the connecting ring 22. The other end of the spring 4 is connected to the quick-connect connector 1 on the other side. The outer surface of the filter screen 21 and the connecting ring 22 form an annular plane 3 23. One end of the spring 4 is fitted onto the filter screen 21 and connected to the annular plane 3 23. The other end is connected to the annular plane 18 of the quick-connect connector 1 on the other side. This is used to hold the filter element in place and prevent it from falling off.

[0030] A transparent outer shell 5 is installed between the two quick-connect connectors 1. The transparent outer shell 5 is a cylindrical body with a through hole in the middle. The transparent outer shell makes it easy to observe the oil stains on the filter element. The two quick-connect connectors 1 are inserted into the through hole through the tapered tube 14 so that they are located on both sides of the transparent outer shell 5, and the two ends of the transparent outer shell 5 are in contact with the connecting ring surface 15.

[0031] The transparent outer shell 5 is a plastic transparent tube, the quick-connect fitting 1 is made of plastic, and the outer filter element 2 and inner filter element 3 are made of metal. The quick-connect fitting 1 is tightly fitted and heat-sealed with the transparent outer shell 5 using an interference fit method, and the outer filter element 2 and inner filter element 3 are tightly fitted and heat-sealed with the quick-connect fitting 1 using an interference fit method.

[0032] This invention features a finely designed quick-connect fitting 1 that ensures a tight fit with the two filter elements, preventing them from falling off and ensuring the two filter elements do not interfere with each other. The outer filter element 2 is held in place by a spring 4, providing a secondary protection against loosening and detachment. By nesting two filter elements together, the inner and outer elements respectively handle coarse and fine filtration, achieving the filtration effect of multiple filter elements in a very small space. This invention boasts a compact structure, excellent dual-filter filtration, and is less prone to clogging; furthermore, the tight fit and spring 4 prevent the filter elements from falling off.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A dual filtration quick plug oil filter cartridge construction characterized by: The device includes two quick-connect fittings, an outer filter element, an inner filter element, and a spring. The inner filter element is smaller than the outer filter element. The outer filter element includes a connecting ring 1 and a filter screen 1 fixed on the connecting ring 1. The inner filter element includes a connecting ring 2 and a filter screen 2 fixed on the connecting ring 2. The inner filter element is connected to a quick-connect fitting on one side via the connecting ring 2. The outer filter element is fitted onto the inner filter element and connected to a quick-connect fitting on the same side via the connecting ring 1. There is a gap between the outer filter element and the inner filter element. The filter screen 1 and the filter screen 2 have a plurality of filter holes staggered on them. One end of the spring is fitted onto the surface of the filter screen 1 of the outer filter element and connected to the connecting ring 1. The other end of the spring is connected to the quick-connect fitting on the other side. A transparent outer shell is installed between the two quick-connect fittings.

2. The double filtration quick plug oil filter cartridge structure of claim 1 wherein: The quick-connect connector includes an end cap, a first tapered tube, and a second tapered tube connected in sequence. The end cap has an oil pipe interface. The second tapered tube has an annular boss connected to it, and the first annular boss has an annular boss connected to it. The outer diameter of the first annular boss is smaller than that of the second tapered tube, and the outer diameter of the second annular boss is smaller than that of the first annular boss. The second annular boss has an oil inlet and outlet. The oil pipe interface passes through the end cap, the first tapered tube, the second tapered tube, the first annular boss, and the second annular boss in sequence and is connected to the oil inlet and outlet. The connection between the first tapered tube and the second tapered tube forms a connecting ring surface. The connection between the first annular boss and the second tapered tube forms an annular plane. The connection between the second annular boss and the first annular boss forms an annular plane.

3. The double filtration quick plug oil filter cartridge arrangement of claim 2 wherein: The inner filter element is sleeved on the annular boss two through the second connecting ring and fits into the annular plane two. The outer filter element is sleeved on the annular boss one through the first connecting ring and fits into the annular plane one.

4. The double filtration quick plug oil filter cartridge arrangement of claim 2 wherein: The outer surface of the filter screen and the connection point of the connecting ring form an annular plane three. One end of the spring is sleeved on the filter screen and connected to the annular plane three, and the other end is connected to the annular plane one of the quick-connect connector on the other side.

5. The double filtration quick plug oil filter cartridge arrangement of claim 3 wherein: The transparent outer shell is a cylindrical body with a through hole in the middle. The two quick-connect connectors are inserted into the through hole through tapered tubes and positioned on both sides of the transparent outer shell. The two ends of the transparent outer shell are in contact with the connecting ring surface.

6. The double filtration quick plug oil filter cartridge arrangement of claim 5 wherein: The transparent outer shell is a plastic transparent tube, the quick-connect fitting is made of plastic, and the outer and inner filter elements are made of metal. The quick-connect fitting is heat-fitted and tightly fitted to the transparent outer shell using an interference fit, and the outer and inner filter elements are heat-fitted and tightly fitted to the quick-connect fitting using an interference fit.

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