A fuel filter dismounting structure

Abstract

The utility model relates to a fuel filter dismounting structure, the utility model discloses a shell is provided with the accommodating cavity of one end opening, paper core part can be accommodated in the accommodating cavity, wherein, paper core part is towards the open end surface of accommodating cavity and has a plurality of force bearing parts along the central axis circumferential distribution, and the force bearing part is angle setting with paper core part end surface and has the pressure -bearing surface and the thrust surface of opposite setting, and the force bearing part has elasticity, upper cover cooperates with the open end of shell, and upper cover is towards the inside of shell and is provided with the force applying part corresponding with force bearing part, and the force applying part includes extrusion surface and push surface, the utility model can avoid the distortion of paper core part during assembling, and the filter is more convenient to take out paper core part when maintaining.

Description

Technical Field

[0001] This utility model relates to the field of fuel filter technology, and in particular to a fuel filter disassembly and assembly structure. Background Technology

[0002] The primary function of a fuel filter is to filter impurities in fuel, ensuring its cleanliness and thus guaranteeing the stable and reliable operation of the entire fuel injection system. However, some modular fuel filters on the market are prone to paper core component distortion and deformation during assembly, and removing the paper core component during maintenance is also difficult. These problems not only affect the product's lifespan but also cause inconvenience for paper core component replacement and routine maintenance. Summary of the Invention

[0003] Therefore, this utility model provides a fuel filter disassembly and assembly structure that can prevent twisting and deformation of the paper core component during assembly, making it more convenient to remove the paper core component during filter maintenance.

[0004] To solve the above-mentioned technical problems, this utility model provides a fuel filter disassembly and assembly structure, including:

[0005] The housing has a receiving cavity with an opening at one end;

[0006] A paper core component can be housed within the receiving cavity, wherein the paper core component has a plurality of load-bearing parts distributed circumferentially along its central axis on one end face facing the opening of the receiving cavity, the load-bearing parts are angled to the end face of the paper core component and have a pressure-bearing surface and a push-bearing surface arranged opposite to each other, and the load-bearing parts are elastic;

[0007] The top cover mates with the open end of the housing. The top cover has a force-applying part corresponding to the force-bearing part facing the inside of the housing. The force-applying part includes a pressing surface and a pushing surface.

[0008] When the top cover is rotated and assembled into the housing along the first rotation direction, the pressing surface can press the pressure bearing surface and provide an axial force for the paper core component to enter the housing; when the top cover is rotated and disassembled along the second rotation direction, the pushing surface can contact and cooperate with the pushing surface, so that the paper core component rotates together with the top cover and is taken out from the housing. One of the first rotation direction and the second rotation direction is clockwise and the other is counterclockwise.

[0009] In one embodiment of this utility model, the paper core component has a receiving groove on one end facing the opening of the receiving cavity and corresponding to the bearing part. One end of the bearing part is connected to the receiving groove, and the other end of the bearing part extends obliquely out of the receiving groove. When the pressing surface can press the pressing surface, the bearing part can be pressed into the receiving groove.

[0010] In one embodiment of this utility model, the extrusion surface and the pressure bearing surface, and the pushing surface and the push bearing surface are in planar contact.

[0011] In one embodiment of the present invention, the extrusion surface is constructed as a plane extending in an arc shape along the rotation center axis of the upper cover, and the load-bearing part is constructed as an elastic plate extending in an arc shape corresponding to the shape of the extrusion surface.

[0012] In one embodiment of this utility model, the pushing surface is constructed as an inclined plane that is angled to the extrusion surface.

[0013] In one embodiment of this utility model, the upper cover is connected to a connecting plate, and the force-applying part is disposed at the end of the connecting plate.

[0014] In one embodiment of this utility model, the upper cover and the housing are connected by a threaded connection.

[0015] In one embodiment of this utility model, the outer peripheral surface of the top cover is provided with an external thread, and the inner peripheral surface of the housing is provided with an internal thread that mates with the external thread.

[0016] In one embodiment of this utility model, an annular groove is provided on the outer peripheral surface of the top cover on one side of the external thread, and a sealing ring is provided in the annular groove. When the top cover is screwed into the housing, the sealing ring seals between the top cover and the housing.

[0017] In one embodiment of this utility model, the plurality of load-bearing parts are evenly distributed along the circumferential direction.

[0018] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0019] The fuel filter assembly and disassembly structure described in this utility model effectively simplifies the installation and disassembly of the paper core component by providing multiple elastic bearing parts circumferentially at the end of the paper core component, which cooperate with the force-applying parts on the upper cover. Through the cooperation between the bearing and force-applying parts, the paper core component receives axial clamping force during the rotational assembly of the upper cover, ensuring reliable installation, preventing twisting and deformation during assembly, and preventing loosening or detachment during use. Furthermore, the paper core component can be easily removed by rotation during disassembly, improving the convenience of filter maintenance. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1This is a schematic diagram of the overall structure of the fuel filter assembly and disassembly structure of this utility model.

[0022] Figure 2 This is a structural schematic diagram of the paper core component of this utility model.

[0023] Figure 3 This is a structural schematic diagram of the force-applying part of this utility model.

[0024] Figure 4 This is a half-sectional structural diagram of the top cover of this utility model.

[0025] Explanation of reference numerals in the instruction manual:

[0026] 1. Housing; 11. Receiving cavity; 12. Internal thread;

[0027] 2. Paper core component; 21. Load-bearing part; 211. Pressure-bearing surface; 212. Push-bearing surface; 22. Receiving groove;

[0028] 3. Top cover; 31. Force application part; 311. Extrusion surface; 312. Pushing surface; 34. Connecting plate; 35. External thread;

[0029] 4. Sealing ring. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0031] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0032] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0033] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0034] Reference Figures 1 to 4 As shown, the present invention provides a fuel filter disassembly and assembly structure, comprising:

[0035] The housing 1 has a receiving cavity 11 with an opening at one end;

[0036] The paper core component 2 can be housed in the receiving cavity 11. The paper core component 2 has a plurality of load-bearing parts 21 distributed circumferentially along its central axis on one end face facing the opening of the receiving cavity 11. The load-bearing parts 21 are set at an angle to the end face of the paper core component 2 and have a pressure-bearing surface 211 and a push-bearing surface 212 arranged opposite to each other. The load-bearing parts 21 are elastic.

[0037] The upper cover 3 is fitted with the open end of the housing 1. The upper cover 3 is provided with a force-applying part 31 corresponding to the force-bearing part 21 facing the inside of the housing 1. The force-applying part 31 includes a pressing surface 311 and a pushing surface 312.

[0038] When the upper cover 3 is rotated and assembled into the housing 1 along the first rotation direction, the pressing surface 311 can press the pressure bearing surface 211 and provide an axial force for the paper core component 2 to enter the housing 1; when the upper cover 3 is rotated and disassembled along the second rotation direction, the pushing surface 312 can contact and cooperate with the pushing surface 212, so that the paper core component 2 rotates together with the upper cover 3 and is taken out from the housing 1. One of the first rotation direction and the second rotation direction is clockwise and the other is counterclockwise.

[0039] By providing multiple elastic bearing portions 21 circumferentially at the ends of the paper core component 2, and cooperating with the force-applying portions 31 on the upper cover 3, the installation and disassembly of the paper core component 2 can be effectively simplified. Through the cooperation between the bearing portions 21 and the force-applying portions 31, the paper core component 2 can obtain axial clamping force during the rotational assembly of the upper cover 3, ensuring reliable installation of the paper core component 2, preventing twisting and deformation during assembly, and preventing loosening or detachment during use. Simultaneously, the paper core component 2 can be easily removed by rotation during disassembly, improving the convenience of filter maintenance.

[0040] In one embodiment, the paper core component 2 has a receiving groove 22 on one end facing the opening of the receiving cavity 11, corresponding to the load-bearing part 21. One end of the load-bearing part 21 is connected to the receiving groove 22, and the other end of the load-bearing part 21 extends obliquely out of the receiving groove 22. When the pressing surface 311 can press the pressing surface 211, the load-bearing part 21 can be pressed into the receiving groove 22.

[0041] In addition, multiple load-bearing parts 21 are evenly distributed along the circumference, and the number and position of the force-applying parts 31 correspond to the load-bearing parts 21. Under the action of the extrusion surface 311, the load-bearing parts 21 can enter the receiving groove 22, so that the pressure-bearing surface 211 is flush with the end face and the force is evenly distributed, thereby reducing the deformation and damage of the load-bearing parts 21 during the assembly process and improving the re-assembly and service life of the paper core component 2.

[0042] In one embodiment, the pressing surface 311 and the bearing surface 211, and the pushing surface 312 and the pushing surface 212, are in planar contact. This planar contact helps to disperse stress during force transmission, reduces wear and damage caused by localized stress concentration, extends the service life of structural components, and ensures mechanical stability during assembly and disassembly.

[0043] Specifically, the extrusion surface 311 is configured as a plane extending in an arc shape along the rotation center axis of the upper cover 3, and the load-bearing part 21 is configured as an elastic plate extending in an arc shape corresponding to the shape of the extrusion surface 311. This facilitates more uniform force distribution and better fit, improves clamping reliability, and reduces assembly difficulty and damage risk.

[0044] The elastic plate can repeatedly deform and spring back during assembly and disassembly, ensuring that the paper core component 2 can always be installed and disassembled smoothly, maintaining a reliable sealing and clamping effect. The elastic plate can be made of plastic sheets, fiber-reinforced composite materials, or polymer elastic materials, or it can be made of metal materials with excellent elasticity and corrosion resistance, preferably stainless steel or spring steel. These materials have good resilience, maintaining shape stability under repeated stress, and possess strong corrosion resistance, meeting the long-term working requirements in fuel environments.

[0045] Specifically, the pushing surface 312 is configured as an inclined plane at an angle to the pressing surface 311. This helps to transfer the disassembly force to the supporting surface 212, allowing the paper core component 2 to smoothly rotate out of the housing 1 with the top cover 3, thus improving disassembly efficiency.

[0046] In one embodiment, the upper cover 3 is connected to a connecting plate 34, and the force-applying part 31 is disposed at the end of the connecting plate 34. The connecting plate 34 also has an arc-shaped structure.

[0047] In one embodiment, the upper cover 3 and the housing 1 are connected by a threaded connection. Specifically, the outer circumferential surface of the upper cover 3 is provided with an external thread 35, and the inner circumferential surface of the housing 1 is provided with an internal thread 12 that mates with the external thread 35. This allows for quick assembly and disassembly, improving maintenance efficiency, while ensuring a tight fit and connection stability.

[0048] In one embodiment, an annular groove is provided on the outer peripheral surface of the upper cover 3 on one side of the external thread 35, and a sealing ring 4 is provided in the annular groove. When the upper cover 3 is screwed into the housing 1, the sealing ring 4 seals between the upper cover 3 and the housing 1. This improves sealing performance and safety.

[0049] In actual use, the elastic plate serves as the load-bearing part 21 of the paper core component 2. One end of the elastic plate is connected to the receiving groove 22 of the paper core component 2, and the other end extends obliquely. When the paper core component 2 needs to be installed in the housing 1 and tightened by the upper cover 3, the pressing surface 311 of the upper cover 3 will generate axial pressing force on the elastic plate, causing the elastic plate to be partially pressed into the receiving groove 22 under the force, thereby ensuring that the paper core component 2 is tightly pressed into the housing 1. During disassembly, the upper cover 3 is rotated, and the pushing surface 312 of the upper cover 3 cooperates with the pushing surface 212 of the elastic plate, causing the paper core component 2 to be rotated out of the housing 1 together.

[0050] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fuel filter disassembly and assembly structure, characterized in that, include: The housing (1) is provided with a receiving cavity (11) with an opening at one end; The paper core component (2) can be housed in the receiving cavity (11), wherein the paper core component (2) has a plurality of load-bearing parts (21) circumferentially distributed on one end face of the receiving cavity (11) facing the opening and along its central axis. The load-bearing parts (21) are set at an angle to the end face of the paper core component (2) and have a pressure-bearing surface (211) and a push-bearing surface (212) arranged opposite to each other. The load-bearing parts (21) are elastic. The upper cover (3) is fitted with the opening end of the housing (1). The upper cover (3) is provided with a force-applying part (31) corresponding to the force-bearing part (21) facing the inside of the housing (1). The force-applying part (31) includes a pressing surface (311) and a pushing surface (312). When the upper cover (3) is rotated and assembled into the housing (1) along the first rotation direction, the pressing surface (311) can press the bearing surface (211) and provide the paper core component (2) with an axial force to enter the housing (1); when the upper cover (3) is rotated and disassembled along the second rotation direction, the pushing surface (312) can contact and cooperate with the pushing surface (212) so that the paper core component (2) rotates together with the upper cover (3) and is taken out from the housing (1). One of the first rotation direction and the second rotation direction is clockwise and the other is counterclockwise.

2. The fuel filter disassembly and assembly structure according to claim 1, characterized in that, The paper core component (2) has a receiving groove (22) on one end facing the opening of the receiving cavity (11) and corresponding to the bearing part (21). One end of the bearing part (21) is connected to the receiving groove (22), and the other end of the bearing part (21) extends obliquely out of the receiving groove (22). When the pressing surface (311) can press the pressing surface (211), the bearing part (21) can be pressed into the receiving groove (22).

3. A fuel filter disassembly and assembly structure according to claim 1 or 2, characterized in that, The extrusion surface (311) and the pressure bearing surface (211) are in planar contact, as are the pushing surface (312) and the pushing surface (212).

4. The fuel filter disassembly and assembly structure according to claim 3, characterized in that, The extrusion surface (311) is configured as a plane extending in an arc along the rotation center axis of the upper cover (3), and the load-bearing part (21) is configured as an elastic plate extending in an arc corresponding to the shape of the extrusion surface (311).

5. The fuel filter disassembly and assembly structure according to claim 4, characterized in that, The pushing surface (312) is configured as an inclined plane that is angled to the pressing surface (311).

6. The fuel filter disassembly and assembly structure according to claim 1, characterized in that, The upper cover (3) is connected to a connecting plate (34), and the force-applying part (31) is located at the end of the connecting plate (34).

7. The fuel filter disassembly and assembly structure according to claim 1, characterized in that, The upper cover (3) and the housing (1) are connected by threads.

8. The fuel filter disassembly and assembly structure according to claim 7, characterized in that, The outer circumferential surface of the top cover (3) is provided with an external thread (35), and the inner circumferential surface of the housing (1) is provided with an internal thread (12) that mates with the external thread (35).

9. A fuel filter disassembly and assembly structure according to claim 8, characterized in that, The outer circumferential surface of the upper cover (3) is provided with an annular groove on one side of the external thread (35), and a sealing ring (4) is provided in the annular groove. When the upper cover (3) is screwed into the housing (1), the sealing ring (4) seals between the upper cover (3) and the housing (1).

10. The fuel filter disassembly and assembly structure according to claim 1, characterized in that, The multiple load-bearing parts (21) are evenly distributed along the circumference.

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